CN1107948C - Magnetic recording and reproducing apparatus - Google Patents

Abstract

A magnetic recording and reproducing apparatus has a supply reel and a take-up reel around which a magnetic tape is to be wound. A first tape guide is provided in the vicinity of a rotary head at the supply reel side and a second tape guide in the vicinity of the rotary head at the take-up reel side. The first and second tape guides are movable in directions of a width of the magnetic tape. A detector detects a height of each of the first and second tape guides. A count value corresponding to the detected height of at least either the first or the second tape guide is obtained by a counter. The height of at least either the first or the second tape guide is adjusted so that the count value becomes equal to a reference value. The count value is set to a specific value when the detected height becomes a reference height corresponding to the reference value after the magnetic tape has been wound around the supply and take-up reels.

Description

Magnetic recording and replay device

Technical field

The present invention relates to have the magnetic recording and the replay device of the mechanism of the height that is used for adjusting guidepost (tape guidance pin), guidepost is arranged on for band and take-up spool side.

Background technology

As everyone knows, the track pattern that is formed on the tape according to magnetic rotation rotary head rotational trajectory differs from one another.Because admissible mechanical deflection, even the track pattern that the magnetic recording system of identical recordings and playback standard forms also can this thing happens.

This destroys sometimes by the data of resetting with other magnetic recording system that writes down the magnetic recording system compatibility of these data.The track pattern of high density recording is narrow more, and serious more problem may take place.

For example, W-VHS video tape recorder (VTR) is suggested, and is used for record and playback high-definition image (high vision-image) data, and these high-definition image data are three parallel track patterns that write down simultaneously, and each track pattern is that 19 μ m are wide.In three parallel track patterns two are used to video signal recording and reset by having rightabout azimuthal two rotating magnetic heads.On the other hand, remaining track pattern be used to audio signal record and by one can trailer record the playback of audio frequency rotating magnetic head.

The permissible variation of the curve in W-VHS VTR on track pattern is about 7 μ m.When the 2nd W-VHS VTR finishes trailer record, this deviation may cause W-VHS VTR record tape track pattern and and the rotational trajectory of the rotating magnetic head of the 2nd W-VHS VTR of a W-VHS VTR compatibility between the skew of the most about 14 μ m.

If produce the deviation of 14 μ m, the audio frequency rotating magnetic head that is used for the trailer record of the 2nd W-VHS VTR will be departed from 14 μ m to the adjacent video track pattern that each has 19 μ m width by the audio track pattern from tape.This just causes being used for having at each the audio recording of the trailer record on the video track pattern 14 μ m width segments of 19 μ m width.

Therefore, be used for vision signal owing to only kept one 5 μ m width segments, the signal of playback will be lowered.

Summary of the invention

The object of the present invention is to provide a kind of magnetic recording and replay device, this device can be eliminated the difference of the allowed mechanical deflection that will influence track pattern on the tape.

The invention provides a kind of magnetic recording and replay device, comprising: tape is around a supply reel and a take-up spool of its winding; Be arranged near first tape guidance pin of supply reel sideway swivel magnetic head; Be arranged near second tape guidance pin of take-up spool sideway swivel magnetic head, first and second tape guidance pins can move on the tape width direction; Be used to detect first detecting device of the height of each first and second tape guidance pin; Be used to obtain counter corresponding to the count value that detects height; Being used to regulate is the regulator of the first or second tape guidance pin height at least, makes count value equal reference value; And when detect highly become be wrapped in for band and take-up spool corresponding to tape on the time the reference altitude of reference value the time, be used for count value is set to the device of setting.

Further, the invention provides a kind of magnetic recording and replay device, comprising: the take-up spool that tape is reeled around the supply reel and the tape of its winding; Be arranged near the tape guidance pin of supply reel and take-up spool sideway swivel magnetic head, these tape guidance pins can move on the tape width direction; Be used to drive the driver that tape guidance pin moves on the tape width direction; Be used to detect the detecting device of the height of each tape guidance pin, and this detecting device produces first reference signal when any one tape guidance pin is moved to first reference altitude on first direction at least, and this detecting device produces second reference signal when any one tape guidance pin is moved to second reference altitude on the second direction opposite with the first direction of tape width at least; The counter that is used for accumulative total umber of pulse of generation when any one tape guidance pin is moved at least; And storer, being used to store first umber of pulse of when first reference value produces, calculating and second umber of pulse of when second reference value produces, calculating, driver moves any tape guidance pin at least based at least the first difference between first and second umber of pulses.

Further, the invention provides a kind of magnetic recording and replay device, comprising: tape is around a supply reel and a take-up spool of its winding; Be arranged near the tape guidance pin of supply reel and take-up spool sideway swivel magnetic head, these tape guidance pins can move on the tape width direction; Be used to drive the driver that tape guidance pin moves on the tape width direction; The counter that is used for accumulative total umber of pulse of generation when any one tape guidance pin is moved at least; Be moved a counting of pulse when stopping then with being used to detect when any one tape guidance pin at least with fixing speed, driver moves any tape guidance pin at least based on the step-by-step counting that detects.

Description of drawings

Fig. 1 is a block scheme according to magnetic recording of the present invention and replay device;

Fig. 2 A is the diagrammatic sketch that is used to explain the defective of traditional magnetic recording and replay device to 2C;

Fig. 3 is at the magnetic recording of dress during the tape and the stereographic map of an embodiment of replay device according to the present invention;

Fig. 4 is pack into the stereographic map of an embodiment of magnetic recording when finishing and replay device of tape according to the present invention;

Fig. 5 is at the magnetic recording of dress during the tape and the stereographic map of another embodiment of replay device according to the present invention;

Fig. 6 A is arranged on the diagrammatic sketch of the guidepost on the base for post to 6C;

Fig. 7 A is the diagrammatic sketch of gearing mesh to 7C;

Fig. 8 A and 8B are the diagrammatic sketch that is used for the operation of explanation reference position transducer;

Fig. 9 A and 9B are arranged on the diagrammatic sketch of the guidepost on the base for post;

Figure 10 A is the process flow diagram that is used to explain according to the operation of magnetic recording of the present invention and replay device to 10C;

Figure 11 A is the process flow diagram that is used to explain according to other operation of magnetic recording of the present invention and replay device to 11C;

Figure 12 is the chronogram that is used to explain according to the operation of magnetic recording of the present invention and replay device;

Figure 13 A and 13B are respectively a planimetric map and sectional views of base for post;

Figure 14 A is to be used to the diagrammatic sketch of explaining that base for post moves to 14C;

Figure 15 A is to be used to other diagrammatic sketch of explaining that base for post moves to 15C;

Figure 16 A is to be used to other diagrammatic sketch of explaining that base for post moves to 16C;

Figure 17 is the diagrammatic sketch that is used to explain the operation of height control cam;

Figure 18 A and 18B be used to explain tape pack into during the diagrammatic sketch that moves of guide roller;

Figure 19 is a cut-open view of guide roller;

Figure 20 is another cut-open view of guide roller;

Figure 21 is another cut-open view of guide roller;

Figure 22 A and 22B are arranged on the diagrammatic sketch of a guidepost on the base for post;

Figure 23 A is arranged on the diagrammatic sketch of another guidepost on the base for post to 23C;

Figure 24 A and 24B are arranged on the diagrammatic sketch of another guidepost on the base for post;

Figure 25 A is arranged on the diagrammatic sketch of another guidepost on the base for post to 25C;

Figure 26 A is arranged on the diagrammatic sketch of another guidepost on the base for post to 26C;

Figure 27 be according to the present invention during tape is packed into the stereographic map of another embodiment of magnetic recording and replay device;

Figure 28 A is arranged on the diagrammatic sketch of the guidepost on the base for post to 28C;

Figure 29 is arranged on the diagrammatic sketch of another guidepost on the base for post;

Figure 30 is the stereographic map at a height adjustable structure of the fixed part of magnetic recording according to the present invention and replay device;

Figure 31 is the stereographic map at another height adjustable structure of the fixed part of magnetic recording according to the present invention and replay device;

Figure 32 A and 32B are arranged on guidepost sectional view and the planimetric map on the base for post respectively;

Figure 33 is the diagrammatic sketch of guide roller and tape cassete opening;

Figure 34 A and 34B are the diagrammatic sketch of guide roller.

Embodiment

With reference to the accompanying drawings, will be described according to a preferred embodiment of the invention.In the accompanying drawings, mutually the same or similar element is marked by identical reference marker and label among the embodiment.

In Fig. 1, the signal that be recorded is input to record and replay processor 4 through input end 1.This signal is handled and is rotated magnetic head 3 by processor 4 and is recorded on the tape (not shown).

In playback, the signal of record is reset from tape through rotating magnetic head 3.Replay signal is handled and is exported through output terminal 2 through record and replay processor 4.

Playback duration, record and replay processor 4 provide frequency modulated signal to envelope curve detecting device 5, and envelope curve detecting device 5 is to controller 6 output envelope curve signals.

The record of controller 6 control charts 1 and the repertoire of replay device are provided to a control signal with response through input end 17 there.Controller 6 can comprise CPU, ROM, RAM, counter, on/following counter etc.

The magnetic tracks that the envelope curve signal indication is recorded in the signal on the tape is bent degree.And this envelope curve signal is used to adjust first and second guideposts (tape guidance pin) that are installed in supply reel side and take-up spool side respectively, along the tape operating path, controls automatically by closed loop, makes track part meet the rotational trajectory of rotating magnetic head.

Controller 6 provides control data to magnetic drum controller (MDC) 13 and tape operation controller 14.Magnetic drum controller (MDC) 13 is with predetermined rotational speed and phase place rotary head drum CD-ROM drive motor (will be described in the back).Tape operation controller 14 control tapes are with predetermined travelling speed and phase place operation.As hereinafter described, controller 6 is further controlled the controller 15 of packing into.

Reference position sensor 7, rotary encoder 8 and control motor 9 constitute first height adjustable structure, are used to adjust the height of first guidepost that is arranged on the supply reel side.

On the other hand, reference position sensor 10, rotary encoder 11 and control motor 12 constitute second height adjustable structure, are used to adjust the height of second guidepost that is arranged on the take-up spool side.

To 2C the first and second height control mechanisms are described with reference to figure 2A.

Fig. 2 C shows drum Du, following drum Dd and the basic Db of drum.Also be arranged in the loading mechanism at the first and second base for post PB1 and the PB2 shown in Fig. 2 C.

Be arranged on base for post PB1 and the PB2 is respectively the first guidepost GP1 and the first tilt column SP1 and the second guidepost GP2 and the second tilt column SP2.Guidepost GP1 and GP2 are removable on the direction perpendicular to base for post PB1 and PB2 respectively.Finish when operation of packing into when loading mechanism, guidepost GP1 and GP2 will be moved to the precalculated position for band and take-up spool side respectively.

Fig. 2 A is a planimetric map, shows and go up the state of drum and marginal portion thereof when the operation of packing into is finished.

When Du and Dd operation is roused on tape T edge up and down, the bulging up and down Du of tape winding and Dd180 ° (drum central angle) or more, when a tape T by at the continuous straight path identifying recording layer that resembles straight line tape (the reference tape that is used to adjust), and when the height of guidepost GP1 and GP2 all is a predetermined reference height, the envelope curve that is rotated a playback frequency-modulation signal of magnetic head 3 playbacks will have a rectangular shape.

But, if the height of guidepost GP1 and GP2 is not a reference altitude, though tape T by at continuous straight path identifying recording layer, the envelope curve of playback frequency modulated signal will have the waveform of shape shown in Fig. 2 B, this waveform depends on the height of GP1 and GP2.

In addition, even the height of guidepost GP1 and GP2 is the predetermined reference height, when tape T by the time at the curvilinear path identifying recording layer shown in Fig. 2 C, an envelope curve of the frequency modulated signal of playback also will have a waveform that resembles the shape shown in Fig. 2 B.

The invention provides a closed loop automatic guide post height control system, this system produces a track part that meets the rotational trajectory of rotating magnetic head on tape.

In more detail, the closed-loop control system basis produces height control signal from the envelope curve change-detection curve data of the frequency modulated signal of magnetic tape reproducing.Curve data is represented the degree of crook at the two ends of data recording track.The height quilt of guidepost is based on the height control signal adjustment, thereby the frequency modulated signal of resetting will have a rectangular shape.

In Fig. 3,4 and 5, rouse up and down Du and Dd on the drum base constitute a bulging body assembly DA.The basic DB of drum is installed in a fixed part of record and replay device.Being arranged on drum among the Du is a bulging CD-ROM drive motor Md, and its rotor is installed to bulging Du.As described below, upward rousing Du is a rotary head drum.

A flat board 18 is set on the solid DA, and the stator of magnetic drum CD-ROM drive motor Md is fixed on dull and stereotyped 18 by screw rod 20 and 21.The central shaft 19 of drum body MA is fixed on down the core of drum Dd, and following drum Dd is fixed on the basic DB of drum.The basic DB of drum further is provided with two basic pawl BC (only illustrating for brevity).

Rouse Du and Dd up and down and be installed into have a clearance G between them, rotating magnetic head 3 is set on the clearance G just.Rotating magnetic head 3 will be at the precalculated position of the record and the fixed part of replay device formation rotational trajectory.

According to the record and the replay device method of magnetic recording and replay device use, a plurality of magnetic rotation magnetic heads can be set up.

Loading mechanism is provided with two the first guidepost GP1 and the first tilt column SP1 and two the second guidepost GP2 and second tilt column SP2 that all are installed on the second base for post PB2 of all being installed on the first base for post PB1.

In the operation of packing into, loading mechanism is pulled out tape from tape cassete.When tape is finished the predetermined outside surface that is wrapped in bulging up and down Du and Dd in the operation of packing into, base for post PB1 is moved, thereby guidepost GP1 and tilt column SP1 are placed in the supply reel side along the tape operating path, on the other hand, base for post PB2 is moved, thereby guidepost GP2 and tilt column SP2 are placed in the take-up spool side along the tape operating path.

The first and second base for post PB1 and PB2 for example are fixed on the connector of loading mechanism (not shown), and can move along the guide rail (not shown).

In finishing the operation of packing into, base for post PB1 and PB2 will mesh with basic pawl BC1 and BC2 respectively.Therefore, in finishing the operation of packing into, base for post PB1 and PB2 will be fixed on to have about about magnetic recording and replay device and in the die cavity of the predetermined location relationship of above-below direction.

To this, in Fig. 3,4 and 5,, only show the second guidepost GP2, tilt column SP2 and base for post PB2 for for simplicity.The first guidepost GP1, tilt column SP1 and base for post PB1 are positioned at the opposite side of bulging body DA.

Fig. 6 A shows the structure of guidepost GP1 to 6C, and still, it is common to guidepost GP1 and GP2.

An end of axle 22 is inserted in the hole 55 that is formed on the base for post PB1, and it will limit the direction of transfer of axle 22.A lower limb 23 is fixed on around the axle 22, and gear 23g is at the following outside surface of lower limb 23.In addition, screw with external thread 23a is formed on the hub outside surface of gear 23g.Gear 23g is a secondary gears with elementary (driving) gearing mesh of first elevation control mechanism therefor of the fixed part that is arranged on magnetic recording and replay device, and as described below, gear 23g will rotate with the rotation of primary pinion.

Screw with external thread 23a is screwed in the internal thread 24 that is arranged on the base for post PB1.Internal thread 24 is longer than external thread 23a, thereby when axle 22 when being rotated, guidepost GP1 will be along being moved on the direction of the centre line L of axle 22.External thread 23a can be formed on the external surface peripheral of axle 22.

Be arranged on around the axle 22 and between the upper end 25 of gear 23g and base for post PB1, be resilient ring 26, for example a rubber ring.Resilient ring 26 always upwards pushes away gear 23g, thus external thread 23a and internal thread 24 tight engagement each other.Therefore, gear 23g is with the power rotation that only be applied by the primary pinion of first elevation control mechanism therefor.

Being arranged on the lower limb 23 is a coboundary 27 with projection 27a, and projection 27a is fixed on around the axle 22.A roller 28 is set between edge 23 and 27, and its length equals the width of tape.Be installed in by screw 30 projection 27a a upper surface be a semicircle barricade 29.

In Fig. 3,4 and 5, an interpretation device (photointerrupter) 31 is set up, and cooperates with semicircle barricade 29, as partial reference position transducer 7 (10).

Rotary encoder 8 (11) is loaded with generation the pulse of data in Fig. 3,4 and 5, the sense of rotation and the revolution of the axle 32 of this data representation control motor 9 (12).Rotary encoder 8 (11) is made of a shielding wing plate 33 and the interpretation device 34 around the axle 32 that is arranged on control motor 9 (10).

Be arranged on equally axle around 32 be one with gear 36 meshed gears 35, gear 36 has the turning axle 38 of power delivery system.A gear 37 is installed on the gear 36 and with gear 39 and meshes, and gear 39 has a turning axle 40.Gear 39 is arranged on the primary pinion of fixation side height control mechanism of the fixed part of magnetic recording and replay device.

In the operation of packing into, base for post PB1 (2) moves to bulging body DA side along a predetermined transfer path from tape cassete.Then, when finishing when operation of packing into, the end of base for post PB1 (2) meshes the secondary gears 23g of first (the second) the height control mechanism that is arranged on the base for post side and the primary pinion 39 of fixation side height control mechanism with basic pawl BC1 (2) engagement.

The summit of gear 23g and each tooth of 39 does not form plate part, thereby helps their engagement fully and engagement base for post PB1 (2) and basic pawl BC1 (2), shown in Fig. 7 B and 7C, thereby has avoided incomplete engagement shown in Fig. 7 A.

Fig. 8 A and 8B have explained the reference position of reference position sensor 7 (10) detections with barricade 29 and interpretation device 31.Sensor 7 also is provided with photocell 41 and light receiving element 42.When semicircle barricade 29 enter that light transmits and receives between element 41 and 42 and when coming out therefrom sensor 7 will produce a position signalling.

Semicircle barricade 29 can be a reflection-type, is received by light receiving element 42 by its light from photocell 41 emissions.In addition, reference position sensor 7 (10) can be the magnetic type, has a permanent magnet and a magnetic detecting element, as Hall effect element, replaces optical position sensor, shown in Fig. 8 A and 8B.

Shown in Fig. 6 B, semicircle barricade 29 is fixed on by screw 30 on the upper surface of projection 27a of coboundary 27 of guidepost GP1 (2).More particularly, when the guide surface (lower surface of the upper surface of lower limb 23 or coboundary 27) of guidepost GP1 (2) is fixed on a predetermined reference height that is used for realizing writing down with the high degree of compatibility of replay operations magnetic recording and replay device, semicircle barricade 29 is conditioned to be positioned on the position, the moment that this position is received by light receiving element 42 corresponding to photocell 41 emitted light beams is shown in Fig. 8 B.Here, Fig. 8 B shows semicircle barricade 29 and enters interpretation device 31 reference position of dark state.

The umber of pulse that signal that the guide surface of guidepost GP1 (2) produces by reference position sensor 7 (10) and rotary encoder 8 (11) produce is detected.Specifically, the reference rotatable phase of barricade 29 is decided to be its a certain position, the moment that this position is received by light receiving element 42 corresponding to photocell 41 emitted light beams.And when barricade 29 was positioned in reference to rotatable phase, the reference position of the guide surface of guidepost GP1 (2) was decided to be the height of guidepost GP1 (2).So, the guide surface of guidepost GP1 (2) is from the offset of reference position in the vertical direction, or height tolerance, by a pulse accumulative total acquisition of reference position and rotary encoder 8 (11).The pulse accumulative total is provided by a up-down counter, and this impulse meter is used subtraction at guidepost GP1 (2) when offseting downward with addition when upwards being offset.

By with the rotation of gear 39 meshed gears 23g, guidepost GP1 (2) but in the vertical direction move.And it moves up or down sometimes by external force thus, even gear 23g does not mesh with gear 39.And if guidepost GP1 (2) has been conditioned back guidepost GP1 (2) rotation one or many, thereby barricade 29 is fixed on reference to rotatable phase, will not correspond to the height of the guide surface of guidepost GP1 (2) with reference to rotatable phase.

For fear of these defectives, the resilient ring of describing with reference to figure 6B and 6C 26 (or spring) is applied thereto also non-rotary guidepost GP1 (2) even be preferred for external force.And, a detent can be set along the operating path of barricade 29, guidepost GP1 (2) is rotated once at most.In addition, can on barricade 29, form a groove, be used for after barricade 29 is adjusted in reference to rotatable phase by a screw thread fixed mask plate 29.

As mentioned above, in finishing the tape fitting operation, the predetermined height that the guide surface of the first and second guidepost GP1 and GP2 is adjusted to record and resets.And, in playback, guide surface is further regulated by height control signal by height adjustment mechanism, height control signal is to produce by the crooked data that representative is closed into the track of the first and second guidepost GP1 and GP2, be based on and obtain from the signal of magnetic tape reproducing, thereby make track on it meet the rotational trajectory on the rotary head drum, to obtain preferable replaying effect.

On this point, the track major part on the tape is bent imaging letter " U " or " S ".Under the situation of alphabetical serpentine bending, the height of the guide surface of the first and second guidepost GP1 and GP2 will be regulated in the opposite direction, that is to say, one higher, another is lower, thereby as previously mentioned, utilize the control signal that obtains based on curve data, offset the influence of serpentine track replay signal by elevation control mechanism therefor.

Will be from the envelope curve of the frequency modulated signal of magnetic tape reproducing for wavy, corresponding to the alphabetical serpentine bending of track.After the amplitude demodulation of the frequency modulated signal of resetting, the envelope curve signal is sampled to extract front end envelope curve signal section, middle envelope curve signal section and terminal envelope curve signal section, the continuous path that this envelope curve signal is reset corresponding to amplitude demodulation.

Based on leading section and middle envelope curve signal section, controller 6 produces one first height control signal, and the size and Orientation of height of the lower limb 23 of the first guidepost GP1 that is located at the supply reel side is regulated in its expression.

In addition, based on terminal and middle envelope curve signal section, controller 6 produces one second height control signal, and its expression adjusting is located at the size and Orientation of height of lower limb 23 of the second guidepost GP2 of take-up spool side.

First and second height control signals are provided to the control motor 9 and 12 of the elevation control mechanism therefor of the first and second guidepost GP1 and GP2 respectively.

The amplitude of middle envelope curve signal section will be not can bigger variation, even the height of the first and second guidepost GP1 and GP2 is conditioned.By relatively obtaining highly to regulate data corresponding to the sequential sampling value on the same position of the envelope curve signal of the frequency modulated signal of magnetic tape reproducing.On normal direction or reverse direction, by the drive signal corresponding to first and second height control signals, control motor 9 and 12 corresponds respectively to first and second height control signals with the revolution that is rotated.

Control motor 9 and 12 applies power with gear 35 and gear 36, gear 37 through being fixed on turning axle 32 to primary pinion 39.This power will further be delivered to the secondary gears 23g that meshes with secondary gears 39, and gear 23g will be rotated on normal direction or reverse direction.Guidepost GP1 and GP2 will be moved by the center line along axle 22, and therefore the lower limb 23 of axle 22 will be moved vertically.

In magnetic recording and replay device shown in Figure 5, guidepost GP1 and GP2 are separately positioned on base for post PB1 and the PB2, thereby they can slide about the predetermined reference height in the scope of predetermined top and the bottom under the help of resilient ring 26 vertically, with the highly compatible of magnetic recording and replay device in acquisition record and the replay operations.

By carrying out the location of base for post PB1 and PB2 respectively with the engagement of basic pawl BC1 and BC2.More particularly, engagement by 43 and parts 44 of concave surface shown in Figure 5 (V-notch), position in the horizontal direction, and position by projection 45 and being engaged on the vertical direction of localization part (not shown) that is arranged on each base for post PB1 and the PB2.

Guidepost GP1 and GP2 are separately positioned on base for post PB1 and the PB2, as mentioned above.The engagement of the engagement by each base for post and basic pawl and other element of elevation control mechanism therefor, the guide surface height of each guidepost is adjusted to the determined height of elevation control mechanism therefor of fixed part side and base for post side.

In Fig. 9 A and 9B, mate 46a is formed on the lower limb 46 of the axle 22 of guidepost GP1 (2).Mate 46a can mesh with an engaging groove 47b, and engaging groove 47b is formed on the wheel hub of the gear 47 of fixation side elevation control mechanism therefor.

In addition, concave surface 49 is formed on the top of base for post DB1 (2).Spring 50 is wrapped on the lower surface and the guiding axis of a cylinder 22 between the concave surface 49 of lower limb 46.Spring 50 is always upwards pushed to lower limb 46 and 27 and therebetween roller 28 is set.

Packing ring 52 is fixed on axle 22 lower end by a screw thread 53 in the dimple 51, stretches out from the lower end of axle 22.This defines the upwards skew of guidepost GP1 (2).On axle 48 lower external face of gear 47, form a screw thread 48g.Screw thread 48g and the screw thread 54g engagement that is formed on the projection 54 of rousing basic DB.

Fig. 5 shows the intermediateness of the operation of packing into.When the operation of packing into by when middle state is finished, be formed on the engaging groove 47b engagement on mate 46a and the wheel hub that is formed on gear 47 of front portion of lower limb 46 among Fig. 9 A.

Lower limb 46 is in the parts of base for post side formation height adjustment mechanism.On the other hand, gear 47 is one that constitutes in the parts of fixation side elevation control mechanism therefor.

The section of mate 46a that is formed on the head of lower limb 46 is letter " V " shape, shown in Fig. 9 B.The section of engaging groove 47b that is formed on the wheel hub of gear 47 also is letter " V " shape, thus with mate 46a engagement, up to finishing the operation of packing into.

Based on pack among Fig. 5 the operation finish, the record or replay operations begins and controller 6 to control motor 9 (12) height control signal is provided.Control motor 9 (12) is by the gear 35,36 and 37 swing pinions 47 of power delivery system.The rotation of gear 47 causes the rotation of screw thread 48g, meshes with screw thread 54g simultaneously.This just makes the axle 48 of gear 47 move according to its sense of rotation in the vertical direction.

When the axle 48 of gear 47 was rotated, the barricade 29 of reference position sensor 7 (10) also was rotated, and made position signalling of interpretation device 24 outputs of reference position sensor 7.And axle 48 rotations and in the vertical direction move, and the mate 46a that meshes with engaging groove 46b also will be moved up at Nogata.Therefore guidepost GB1 (2) will be moved by in the vertical direction, with the rotation of response control motor 9 (12).

How the reference altitude of guidepost GP1 and GP2 is set when making record shown in Fig. 3,4 and 5 and replay device, will make an explanation to this to 10C with reference to figure 10A.

In being used in the process flow diagram that the height of loading (manufacturing) is regulated shown in Figure 10 A, at first, at step a1, control motor 9 (12) is actuated in the vertical direction mobile guide post GP1 (2), by surveying instrument, its guide surface is adjusted in predetermined height.Here, guide surface is the upper surface of lower limb, the lower surface or the roller surface of coboundary.Predetermined altitude be intended for realizing writing down with replay operations in the reference altitude of highly compatible of magnetic recording and replay device.Next, in step a2, the count value of counter is stored in the external persistent memory 16 of Fig. 1.

In being used in another process flow diagram that the height of loading (manufacturing) is regulated shown in Figure 10 B, at first, at step b1, control motor 9 (12) is driven, acquisition is from a flat envelope curve of the frequency modulated signal of reference magnetic tape reproducing, with in the vertical direction mobile guide post GP1 (2), regulate its guide surface at a predetermined height.

In detail, in step b1, the reference tape of no sweep is loaded into record and replay device on track.

The control motor 9 of first elevation control mechanism therefor of supply reel side guidepost GP1 is rotated on normal direction or reverse direction, up to reference position signal corresponding to the reference rotatable phase of barricade 29 of reference position sensor 7 outputs, the counter (not shown) of controller 6 calculates the umber of pulse of rotary encoder 8 outputs simultaneously.Umber of pulse is indicated a period of time up to reference position signal is output.Counter is preset at a predetermined number then, for example, is zero when reference position signal is output.

Then, the control motor 12 of second elevation control mechanism therefor of the guidepost GP2 of take-up spool side is rotated on normal direction or reverse direction, up to reference position signal corresponding to the reference rotatable phase of barricade 29 of reference position sensor 10 outputs, another counter (not shown) of controller 6 calculates the umber of pulse of rotary encoder 11 outputs simultaneously.Counter is preset at a predetermined number then, for example, is zero when reference position signal is output.

Then, be transmitted, stablizing under the delivery status, detect the frequency modulated signal of resetting by envelope curve detecting device 5 with reference to tape.Detecting device 5 provides each envelope curve signal of the frequency modulated signal that samples playback and with reference to a track of the correspondence on the tape, to extract envelope curve signal section and a terminal envelope curve signal section in the middle of the anterior envelope curve signal section, one.The signal section that extracts is converted into digital signal and is provided to controller 6.

Controller 6 is regulated the height of the supply reel side first guidepost GP1 by control motor 9 in an adjustable extent, and detect the envelope curve signal.Controller 6 further calculates the size (envelope curve value) of the envelope curve signal that the height change (variation of counter calculated value) according to guidepost GP1 changes.The value of calculating is stored in the storer (not shown) of controller 6.

Controller 6 reads the envelope curve value that has obtained from storer in adjustable extent, and they are compared to each other, and finds out one corresponding to first count value of indication with reference to the envelope curve value of plate rail mark on the tape.First count value of guidepost GP1 is stored in external persistent memory 16.

Next, controller 6 is regulated the height of the take-up spool side second guidepost GP2 by control motor 12 in an adjustable extent, and detect the envelope curve signal.Controller 6 further calculates the size (envelope curve value) of the envelope curve signal that the height change (variation of counter calculated value) according to guidepost GP2 changes.The value of calculating is stored in the storer (not shown) of controller 6.

Controller 6 reads the envelope curve value that has obtained from storer in adjustable extent, and they are compared to each other, and finds out one corresponding to second count value of indication with reference to the envelope curve value of plate rail mark on the tape.Second count value of guidepost GP2 is stored in external persistent memory 16.

Be stored in the calibrated altitude that corresponds respectively to guidepost GP1 and GP2 in the storer 16 as reference altitude data first and second count values of the first and second guidepost GP1 and GP2.Calibrated altitude is scheduled, is used for obtaining writing down the highly compatible with replay operations magnetic recording and replay device.

Therefore, thus the height of regulating the first and second guidepost GP1 and GP2 makes the height of guidepost GP1 and GP2 be adjusted to calibrated altitude corresponding to first and second count values.

Next, with reference to figure 10C, to be described in tape by the adjusting of guidepost height according to the record of magnetic recording system of the present invention and in resetting, and another tape that is recorded data by another magnetic recording system by magnetic recording system according to the present invention playback in the adjusting of guidepost height.

At first, according to the present invention by magnetic recording system at the record of tape with in resetting, in the step c1 of Figure 10 C, a tape is loaded into according to magnetic recording system of the present invention.

Next; at step c2; the control motor 9 of first height adjustment mechanism of supply reel side guidepost GP1 is rotated on normal or reverse direction, and the umber of pulse that the rotary encoder 8 that calculates up to counter produces equals to be stored in the count value in the external persistent memory 16.When umber of pulse equaled storing value, control motor 9 was stopped.

In addition; at step c2; the control motor 12 of second height adjustment mechanism of take-up spool side guidepost GP2 is rotated on normal or reverse direction, and the umber of pulse that the rotary encoder 11 that calculates up to counter produces equals to be stored in the count value in the external persistent memory 16.When umber of pulse equaled storing value, control motor 12 was stopped.

Program among the step c2 is regulated the guide surface of guidepost GP1 and GP2, thereby corresponding to standard guidepost height.Then, behind the completing steps c2, the height of guidepost GP1 and GP2 becomes calibrated altitude.

Next, at step c3, whether the decision operation pattern is playback.If not, or operator scheme is record, handling procedure finishes.

On the other hand, if operator scheme is playback, handling procedure proceeds to step c4.From the magnetic tape reproducing frequency modulated signal.And the envelope curve signal is detected by envelope curve detecting device 5.Then, each envelope curve signal is sampled, extract a front end envelope curve signal section, a middle envelope curve signal section and a terminal envelope curve signal section.The signal section that extracts is converted into digital signal and is provided to controller 6 as crooked data.Controller 6 is regulated the height of guidepost GP1 and GP2, with the serpentine track on the compensation tape according to crooked data drive controlling motor 9 and 12 on normal and reverse direction.Then, EOP (end of program).

In addition, will be described according to the situation in the playback of magnetic recording of the present invention and replay device at another tape that is recorded data by another magnetic recording system.

By step c1 same as described above and c2, guidepost GP1 and GP2 are adjusted to calibrated altitude.Therefore, when by a tape of another magnetic recording and replay device record during by the magnetic recording of the guidepost with adjusting of the present invention and replay device record, this tape can preferably be reset by another magnetic recording and replay device.

Next, at step c3, the tape of another magnetic recording and replay device record is reset.And in step c4 same as described above, controller 6 is regulated the height of guidepost GP1 and GP2, with the serpentine track on the compensation tape according to crooked data drive controlling motor 9 and 12 on normal and reverse direction.

Therefore, even the tape of record has crooked track, the stable signal of can resetting out, identical with from magnetic tape reproducing with straight path.

When the guide surface of guidepost GP1 (GP2) was adjusted to calibrated altitude, as above with reference to shown in figure 8A and the 8B, the barricade 29 of reference position sensor 7 (10) transmitted and received element with the light of interpretation device 31 and has positioning relation.

But barricade 29 is provided in the operation of packing into and will be moved, and the device of interpretation simultaneously 31 is set at fixed part.Because vibrations, collision etc. cause the rotational trajectory of interpretation device 31 to be offset from the reference rotational trajectory sometimes.

For fear of this situation; based on finishing of the operation of packing into; control motor 9 (12) can be rotated on normal or reverse direction, and with mobile guide post GP1 (GP2) vertically in predetermined scope, thereby the reference position of guidepost GP1 (GP2) is corresponding to the count value of counter.

As mentioned above, in magnetic recording shown in Fig. 3,4 and 5 and replay device, the reference position sensor 7 and 10 that is separately positioned on first and second height adjustment mechanisms that supply band and take-up spool side produces the reference position signal that is provided to controller 6.And, rotary encoder 8 and 11 pulses that produce the data that are loaded with sense of rotation and amount, this pulse also is provided for controller 6.In addition, envelope curve detecting device 5 produces the envelope curve signal according to the frequency modulated signal from magnetic tape reproducing, and the envelope curve signal is offered controller 6.

Controller 6 produces the height control signal of the height of guidepost GP1 and GP2 then, drives the control motor 9 and 12 of first and second height adjustment mechanisms respectively, regulates the height of guidepost GP1 and GP2.

Here, first (the second) height adjustment mechanism is the automatic height control system of closed loop, and comprise control motor 9 (12), reference position sensor 7 (10), rotary encoder 8 (11), control motor 9 (12), the gear 23g among Fig. 3 and 4,35 to 37 and 39 or Fig. 5 in gear 35 to 37 and 47, guidepost GP1 (GP2) and controller 6.

As guidepost GP1 (GP2) when being adjusted to reference altitude, it is represented that by a count value of up-down counter this counter calculates the umber of pulse that rotary encoder 8 (11) produces.On the other hand, count value that is to say, reference altitude is stored in the external persistent memory 16 in advance.Therefore, the height of guidepost GP1 (GP2) can be detected from the skew of reference altitude, as the count value of up-down counter be stored in the difference between the count value in the external persistent memory 16 in advance.

Therefore, according to magnetic recording and the replay device shown in Fig. 3,4 and 5, by the count value of counter, the guide surface of guidepost GP1 and GP2 can be adjusted to their reference altitude by automatic height control system, also can accurately be changed.

Figure 11 A is respectively the process flow diagram that the operation of the gear recoil amount of measuring power delivery system is explained in help to 11C.Figure 11 B is the process flow diagram of an Interrupt Process of execution in the section 1 of Figure 11 A.Figure 11 C is the process flow diagram of another Interrupt Process of execution in the section 2 of Figure 11 A.

" beginning " in the process flow diagram of Figure 11 A located, and controller 6 at first reads in " in S1 (S4) " of step a1 from the reference position signal S1 (S4) of reference position sensor 7 (10) outputs, and carries out the processing " S1 (S4)=0 " of step a2.In step a2, judge whether the reference position signal S1 (S4) that reads is " 0 " or " 1 " in step a1.

Reference position signal S1 (S4) appears in the light path between photocell 41 and the light receiving element 42 for the barricade 29 of the state representation reference position sensor 7 (10) of " 0 ", shown in Fig. 8 B, photocell 41 and light receiving element 42 are arranged in the interpretation device 31 of reference position sensor 7 (10).

On the other hand, reference position signal S1 (S4) appears at outside the light path between photocell 41 and the light receiving element 42 for the state representation barricade 29 of " 1 ".

At step a2, when judging that reference position signal S1 (S4) is " 0 ", handling procedure advances to " CNT=0 " of step a8, the operation of the gear recoil amount of the measurement power delivery system of carrying out in the subsequent step of beginning behind step a8.On the other hand, at step a2, when judging that reference position signal S1 (S4) be " 1 ", this represents that a rotatable phase of the barricade 29 of reference position sensor 7 (10) is unsuitable for measuring the state of the gear recoil amount of power translator unit.Therefore, handling procedure advances to " the OUT REVDRV " of step a3, and control motor 9 (12) here is inverted, and handling procedure advances to step a4 " in S1 (S4) ".

In step a4, the reference position signal S1 (S4) that exports from reference position sensor 7 (10) is read, and handling procedure advances to step a5.At step a5, judge whether the reference position signal S1 (S4) that reads at step a4 is " 0 " or " 1 ".When reference position signal was " 1 ", handling procedure returned step a4.Then, the operation of the operation of step a4 and step a5 is repeated, up to the judged result of the reference position signal that obtains by the judgement among the step a5 to read at step a4 for " 1 ".

In step a5, when judging that reference position signal S1 (S4) is " 0 ", handling procedure advances to " TIMER " of step a6, and timer is here through after a while.Then, handling procedure advances to " the OUT STPDRV " of step a7, and control motor 9 (12) here is stopped.Handling procedure advances to " CNT1=0 " among the step a8, begins to measure the operation of the gear recoil amount of the power translator unit of carrying out in the subsequent step behind step a8.

At step a8 " CNT=0 ", the count value that is located at the counter in the controller 6 is set to 0, and handling procedure advances to " the OUT FORDRV " of step a9 then.At step a9, control motor 9 (12) is by driven.The state representation of the time t0 in timetable shown in Figure 12 began to have passed through a period of time after its normal rotation at control motor 9 (12) in this time.In the section 1 of step a12, the pulse S2 (S5) that produces by rotary encoder 8 (11) carries out Interrupt Process at step a8.The content of Interrupt Process is shown in Figure 11 B.

In " in S1 (S4) " of the step b1 of Figure 11 B, reference position signal S1 (S4) is read.At " S4=0 " of step b2, judge whether the reference position signal S4 that reads at step b1 is " 0 " or " 1 ".In " the inc CNT1 " of step b3, the count value that is arranged on counter 1 (not shown) in the controller 6 is increased " 1 ".

That is to say that when the pulse S2 (S5) that produces by the rotary encoder in the section 18 (11) carried out interruption, reference position signal S1 (S4) was read in step b1.Handling procedure advances to step (b2), judges here whether the reference position signal S1 (S4) that reads in step b1 is " 0 " or " 1 ".Under the situation of S1 (S4)=0, handling procedure returns, and under the situation of S1 (S4)=1, handling procedure advances to step b3, and the count value of counter 1 is increased " 1 " here, and handling procedure returns.

In the operation of the gear recoil amount of the measurement power delivery system that starts from step a8, the barricade 29 of reference position sensor 7 (10) of (time t0 is to t1 among Figure 12) appears in the light path between photocell 41 and the light receiving element 42 during the beginning measuring operation, and photocell 41 and light receiving element 42 are arranged in the interpretation device 31 of reference position sensor 7 (10).Therefore, in Figure 12 time t0 during the t1, aforementioned during the reference position signal S1 (S4) that produces of reference position sensor 7 (10) be in " 0 " state.

Therefore, among Figure 12 among the aforementioned time t0 pulse S2 (S5) that rotary encoder 8 (11) produces during the t1 P1 be not counted device 1 counting to P5, guidepost GP1 (GP2) keeps up mobile still (to see S3 among Figure 12 (S6)) during aforementioned.

When the time in Figure 12, t1 judged, the reference position signal S1 (S4) that produces from reference position sensor 7 (10) was changed to " 1 " among the step b2 of Interrupt Process, begin among the step b3 of the counting operation of counter 1 in Interrupt Process.

In the master routine shown in Figure 11 A, control motor 9 (12) is stopped in " the OUT STDRV " of step a12.In step a10 in the master routine shown in Figure 12 A " in S1 (S4) ", reference position signal S1 (S4) is read.In " S1 (S4)=0 " of step a11, judge whether the reference position signal S1 (S4) that reads at step a11 is " 0 " or " 1 ".

In " TIMER " of step a13, the time is waited for, present complete halted state up to control motor 9 (12), and handling procedure is advanced to step a14 " CNT2=0 ".In " CNT2=0 " of step a14, the count value that is arranged on counter 2 (not shown) in the controller 6 is set to 0, and handling procedure advances to step a15 " OUT REVDRV ".In step a15, control motor 9 (12) is inverted by a motor drive signal S3 (S6).

The section 2 from step (a14) to step (a18), by the pulse S2 (S5) that rotary encoder 8 (11) produces, Interrupt Process is performed.The content of Interrupt Process is illustrated in Figure 11 C.

In step c1 in Figure 11 C " in S1 (S4) ", reference position signal S1 (S4) is read.In " S1 (S4)=0 " of step c2, judge that the reference position signal S1 (S4) that reads is " 0 " or " 1 " in step c1.In " incCNT2 " of step c3, a count value that is arranged on the counter c (not shown) in the controller 6 is increased " 1 ".

That is to say that when the pulse S2 (S5) that produces by rotary encoder in the section 28 (11) realized interrupting, reference position signal S1 (S4) was read at step c1.Handling procedure advances to step c2, judges that the reference position signal S1 (S4) that reads at step c1 is " 0 " or " 1 ".Under the situation of S1 (S4)=0, handling procedure returns, and under the situation of S1 (S4)=1, handling procedure advances to step c3, and the count value of counter 1 is increased " 1 " here, and handling procedure returns.

The barricade 29 of reference position sensor PS in start time in section 2 (the time t2 among Figure 12 is to t3) is in the state outside the light path between photocell 41 and the light receiving element 42, and photocell 41 and light receiving element 42 are arranged in the interpretation device 31 of reference position sensor 7 (10).Therefore, the reference position signal S1 (S4) that produces from reference position sensor 7 (10) in the aforementioned time period is in the state of " 1 ", as shown in figure 12.Therefore, the P6 among the pulse S2 (S5) of 8 (11) generations of the rotary encoder from Fig. 1 is counted device 2 countings to P17.

Time t3 in Figure 12 is during the t4, and control motor 9 (12) is rotated, but because the existence that recoils in the gear of power delivery system, rotating force is not sent to guidepost GP1 (GP2) for some time here.During this period, the height of guidepost GP1 (GP2) does not change.Yet the end points of the time that the rotating force that causes in the existence owing to recoil is not transmitted can not be detected.

Time t4 in Figure 12, the barricade 29 of reference position sensor 7 (10) enters photocell 41 in the interpretation device 31 that is arranged on reference position sensor 7 (10) and the light path between the light receiving element 42, thereby reference position signal S1 (S4) is changed to the state of " 0 " by the state from " 1 ".

At time t4, the counting operation of the interrupt routine interrupt counter 2 in the section 2 shown in Figure 11 C.Thereby, pulse P18, P19 behind the time t5 outside the pulse S2 (S5) that rotary encoder 8 (11) produces ... be not counted device 2 countings.

And in the master routine shown in Figure 11 A, control motor 9 (12) is stopped by step a18 " OUTSTDRV ".In step a16 in the master routine shown in Figure 11 A " in S1 (S4) ", reference position signal S1 (S4) is read.In " S1 (S4)=0 " of step (a17), judge that the reference position signal S1 (S4) that reads is " 0 " or " 1 " in step a11.

In " BRA=CNT2-CNT1 " of step a19, the count value of counter 2 is deducted by the count value from counter 1, obtains the measurement result of the gear recoil amount of power delivery system.

Next, the measurement result of the gear recoil amount of the power delivery system that obtains by step (a19) will be explained by timetable shown in Figure 12 in the back.In example shown in Figure 12, the number of the pulse S2 (S5) that rotary encoder 8 (11) produces is 2, promptly, a pulse P6 and a pulse P7, and the count value of counter 1 is 2 during from time t1 point to the time period that time t3 is ordered, the reference position signal S1 (S4) that reference position sensor 7 (10) produces is changed to " 1 " at time t1 point from " 0 ", at time t3 point, controls motor 9 (12) and is inverted through stopping from normal rotation.

The number of the pulse S2 (S5) that rotary encoder 8 (11) is produced from pulse P8 to pulse P17 is 10, in the count value from time t3 point to the time period inside counting device 2 that time t4 is ordered is 10, control motor 9 (12) is at time t3 point, and the reference position signal S1 (S4) that produces from reference position sensor 7 (10) is changed to " 0 " at time t4 point from " 1 ".

The count value 2 of counter 1 is corresponding to the height and position of the guidepost GP1 (GP2) that is much higher than the reference position.

Therefore, along with the count value 2 that deducts counter 1 by the count value 10 from counter 2 obtains the gear recoil amount that a 8-segment pulse obtains power delivery system, counter 2 calculates the pulse S2 (S5) that rotary encoder 8 (11) produces.

The gear recoil amount of the power translator unit of Huo Deing is stored in the external persistent memory 16 as mentioned above, and the recoil amount that is stored in wherein was read before aforesaid record and replay operations.Then, the count value of the pulse S2 (S5) that rotary encoder 8 (11) produces is corrected, proofreading and correct the positional fault that recoil causes, thereby the height and position of guidepost GP1 (GP2) can be set to a calibrated altitude (be used to guarantee to write down with the compatibility of replay operations and a predetermined calibrated altitude) in record and the replay operations.

To be described in another pattern that the recoil positional fault is proofreaied and correct below.For example, under the state that guidepost GP1 (GP2) is moved in a predetermined direction, a counter of controller 6 count value that calculate, that be used for the output pulse of rotary encoder 8 (11) is used to positioning guide column GP1 (GP2).And, at guidepost GP1 (GP2) under the state that is moved on the direction opposite with aforementioned moving direction, drive part is increased an amount corresponding to the count value of storage as the rotation amount of control motor 9 (12), and the count value of this storage is corresponding to the recoil amount of power delivery system.

For example, control motor 9 (12) is rotated in the rotation amount corresponding to the quantitative value of (A+B), quantitative value (A+B) is by the count value A corresponding to a storage of the recoil amount in the power delivery system is added what a quantitative value B obtained, quantitative value B is less than count value A, upwards the object height position of the state that is moved in a predetermined direction up to guidepost GP1 (GP2).In addition, control motor 9 (12) is rotated in the rotation amount corresponding to the quantitative value of (A-B).

Even stop to supply with drive signals at time t2 after some time of process to control motor 9 (12) from time t1, the barricade 29 of reference position sensor 7 (10) is changed to the photocell 41 that is in the interpretation device 31 that is arranged on reference position sensor 7 (10) and the state outside the light path between the light receiving element 42 at time t1, thereby the reference position signal S1 (S4) that produces from reference position sensor 7 (10) is changed to one state from " 0 " state, as shown in figure 12, pulse P6 and the P7 that changes the line of production living based on the mistake of control motor 9 (12) exported from rotary encoder 8 (11).

The time that is changed to one state at the reference position signal S1 (S4) that produces from reference position sensor as shown in figure 12 7 (10) from " 0 " state to 9 (12) beginnings of control motor in the time period of the time that the direction opposite with previous sense of rotation rotated, the mistake from the base of the output pulse S2 (S5) of rotary encoder 8 (11) outputs in control motor 9 (12) then generation.

Therefore, the count value of the number of output umber of pulse S2 (S5) can be used as the data of crossing the commentaries on classics amount of control motor 9 (12).When control motor 9 (12) rotates on the direction opposite with aforementioned sense of rotation, cross the commentaries on classics amount and produce equally, and therefore, for the normal rotation and despining mutually of control motor 9 (12), cross commentaries on classics amount data and measured separately, it is stored in the external persistent memory 16.

When carrying out in magnetic recording and replay device, being used for the height and position of guidepost GP1 (GP2) is set to the calibrated altitude adjusting operation of (being used to guarantee to write down preassigned height) with the replay operations compatibility, or at record be used to during replay operations to control in the operation of height and position of guidepost GP1 (GP2), the commentaries on classics amount of the crossing data that are stored in the external persistent memory 16 are utilized, thereby when the true altitude position of guidepost GP1 (GP2) is conditioned, the object height position is set up by umber of pulse, in this umber of pulse, from the number of the output pulse S2 (S2 (S5)) of rotary encoder 8 (11) output less than the height and position that makes guidepost GP1 (GP2), the object height position by as data storage externally the umber of pulse in the permanent storage 16 by the necessary umber of pulse of actual set.

Figure 13 A and 13B show base for post PB1 (PB2) and the base for post PB of guidepost GP1 (GP2) and the embodiment of guide roller GR (guidepost) who corresponds respectively to as shown in Figure 5.Guide roller GR has a coboundary UF and lower limb LF who is fixed to a Sf, sandwich therebetween be a rotatable roller R.Lower limb LF has the operating rod LF1 and the back of the body braking door bolt LF2 that point to working direction.

The downside Sf1 of axle Sf embeds among the hole PB1a of base for post PB smoothly, is formed in the level and smooth guiding parts that moves on the short transverse.A spring SP a is set between lower limb LF and the base for post PB, always upwards pushes away guide roller GR.Hook St1 and St2 braking that the braking door bolt LF2 of lower limb LF is gone up detent St by base for post PB, and guide roller GR is maintained at constant altitude HL.The root LF3 of braking door bolt LF2 is loaded into slit PB3a of a retained part PB2a of base for post PB, constitutes a rotation brake device.

Figure 14 A shows the mode of operation of the base for post PB of Figure 13 A and 13B to 16C.For for simplicity, in these accompanying drawings, only to the direct relevant element designated with numeral of base for post mode of operation.

Figure 14 A shows the tape state of back record and normal playback of being done of packing into to 14C.The plane of the operating rod LF1 adjustment cam Ca of contact (its details will be described below) of lower limb LF, guide roller GR is lower than half height of packing into.This highly is the normal height that record and normal playback state are shown.

Figure 15 A shows state when guide roller GR is moved upward to 15C.Adjustment cam Ca rotates in the counterclockwise direction, and guide roller GR moves up along cam face at high height Hu.

Figure 16 A shows state when guide roller GR is moved downward to 16C.Adjustment cam Ca rotates in the clockwise direction, and guide roller GR moves down along cam face at lower height Hd.

The height of adjustment cam Ca is regulated and will be described with reference to figure 14B.A cam wheel Cg is roused the axle L1 of basic DB by rotatably packing into, and always by upwards skew of a spring CSP.The distal-most end of axle L1 forms a screw thread, and the height of cam wheel Cg can be conditioned by nutting Cn.After the height of nut Cn is conditioned, by stopping one screw S1 is set, nut Cn is locked.Because therefore nut Cn and screw S1 is set can be conditioned from the top can easily carry out height adjusting by an automechanism.The normal position is a plane and has a specific width, thereby the position of sensor does not need precision.

Figure 17 is the diagrammatic sketch of explanation height adjustment cam Ca.The whole height of the adjustment cam Ca X that rules on one point is adjustable in the scope of two dot-and-dash line Y.In detail, when it contacted the plane of adjustment cam Ca in a scope Zf, the whole adjustable height of adjustment cam Ca made the summit LF1a of operating rod LF1 of the lower limb LF height (normal position) shown in the online N-N that is positioned.The summit LF1a that scope Zd and Zu show operating rod LF1 contacts the rising that the solid line M of adjustment cam Ca represents and the situation of decline surface portion respectively.

Rouse down Dd around it, be provided with one leading, it has a gap in its head and end portion, thereby when the curvature correction of decline guide roller GR is carried out, an excessive power will can not be applied on the tape, this tape by with another magnetic reproducing device record of magnetic reproducing device compatibility of the present invention.

The height of base for post PB will be explained with reference to figure 18A and 18B when tape is packed into.In these accompanying drawings, only to the direct relevant element designated with numeral of base for post PB height change.

When packing beginning into, guide roller GR rises by spring CSP, and stops by detent St, shown in Figure 18 A (height H 10 of packing into).On the other hand, owing to can move up and down at the height of the entopic guide roller GR when finishing that packs into, the height of lower limb LF is lower than the hook St1 of detent St.Naturally, from base for post PB, the height of guide roller GR is lower than the height when packing beginning into, shown in Figure 18 B (normal height H n).

The height of base for post PB is changed (Hi), thereby the height of tape T can not change before tape is packed end into immediately.This has just been avoided when beginning from packing into to the mutually simultaneous destruction to tape of height of finishing to make guide roller GR.In the case, tape T is edge UF or lower limb LF running on top, or descends.

Figure 19 shows another embodiment of guide roller GR1.Adjustment cam Ca1 has the structure of a coboundary UF1 who is used for pushing away guide roller GR1 downwards.Except coboundary UF1 than Figure 13 A to coming to a point more shown in the 16C, this structure is identical to 16C with Figure 13 A, the adjustment cam Ca1 on it is conditioned, thereby guide roller GR1 is moved up and down by coboundary UF1.

Figure 20 shows another embodiment of guide roller GR2.In this embodiment, detent STa is laterally put into the less part of diameter of axle Sf1 wherein.

Figure 21 shows another embodiment of guide roller GR3.A spring SP b is set under the base for post PBa, is used for always pushing away the guide roller GR3 between base for post PBa and the split holder SH downwards, and split holder SH is pressed into the lower end of a Sf2.The root SHa of split holder SH is loaded into the slit of base for post PBa, constitutes a rotation brake device.Moving direction on the short transverse is opposite with previously described direction with the base for post height when packing into.In Figure 19 to 21, for for simplicity, element designated with numeral only to playing an important role among the embodiment.

Other embodiment that is arranged on the guidepost (tape guide) that supplies band and take-up side will be described to 26B with reference to figure 22A.

Base for post GPa shown in Figure 22 A and the 22B is provided with a lower limb 700 and gear 70g.After being adjusted to predetermined phase place, by a screw 270 that passes the slit 280 of barricade 130, barricade 130 is installed on the position of gear 70g.Lower limb 700 is fixing around axle 500, and axle 500 passes guidepost GPa and is formed with the base for post PBa of internal thread 800.An external thread 70a with the hub outside surface that is formed in gear 70g of internal thread 800 engagement.Internal thread 800 is longer than external thread 70a, thereby when rotation guidepost GPa will be displaced to the center line of axle 500.

A bolt 290 is arranged in the groove 310 of axle 500 bottoms.Spring 300 is arranged between the upper wall portion of the upper surface of bolt 290 and groove 310.Spring 300 always pushes away guidepost GPa downwards, to realize the engagement fully of external thread 70a and internal thread 800.Therefore, at the height adjustment mechanism place of base for post side as the gear 70g of secondary gear never by any external force rotation.Gear 70g is only by rotating with a gear meshing at the height adjustment mechanism place that is arranged on fixed part.

Next, shown in Figure 23 A and 23B, guidepost GPb is provided with a coboundary 111.A barricade 131 is installed on the projection 111a of coboundary 111.Guidepost GPb further is provided with a detent 321, thereby a working portion 321a of detent 321 is fixed in the track of barricade 131.Moving of detent 321 restriction barricades 131, thus rotation is no more than once.

Shown in Figure 24 A and 24B, a guidepost GPc is provided with a lower limb 702.Barricade 13 is installed on the lower surface of a gear 72g who is formed on lower limb 702.In addition, a detent 332 is set in the track of barricade 132.Detent 332 also limits moving of barricade 132, thereby rotation is no more than once.

Next as Figure 25 A to shown in the 25C, guidepost GPd is provided with an external thread 73a, be formed on around the lower process of lower limb 703, lower limb 703 be formed on the axle 503 around.External thread 73a meshes with an internal thread (not shown) of the center pit that is formed on gear 373g.After being adjusted to predetermined rotatable phase, be installed on the gear 373g by 273, one barricades 133 of screw that pass the slit 283 of barricade 133.Axle 503 passes lower limb 703 and a coboundary 113, and is provided with a bolt 353 at its end portion.Bolt 353 is provided with projection 353a and 353b, as the rotation brake device.The bottom and the bolt 353 of axle 503 stretch out in the groove 383 of base for post PBd.Projection 353a and 353b are not closely inserted slit 393 and 403 respectively.

Spring 363 is arranged between the upper wall portions in the upper surface of bolt 353 and the hole 383 among the base for post PBd.Spring 363 always pushes away guidepost GPd downwards, to realize the engagement fully of the external thread 73a and the internal thread of the center pit that is formed at gear 373g.Therefore, the gear 373g that is used as the secondary gear of base for post side height adjustment mechanism never rotates by any external force.Gear 373g is only by rotating with gear meshing of the height adjustment mechanism that is arranged on fixed part.

Next, be provided with an axle 504 as Figure 26 A to the guidepost GPe shown in the 26C.Stretch out from base for post PBe bottom the bottom of axle 504.Form a gear 54a around axle 504 bottoms, an internal thread (not shown) engagement in gear 54a and the center pit that is formed on gear 374g.After being adjusted to predetermined rotatable phase, by a screw 274 that passes the slit of barricade 134, barricade 134 is installed on the gear 374g.Axle 504 passes a lower limb 704 and a coboundary 114.A rotation brake device 444 is set among the hole 74b of the lower surface that is formed at lower limb 704, also is arranged in the hole 454 among the base for post PBe.

Spring 434 is set between the lower surface of the bottom of a convex surface 424 that is formed on base for post PBe top and lower limb 704.Spring 434 always upwards pushes away guidepost GPe, to realize the engagement fully of the external thread 54a and the internal thread of the center pit that is formed on gear 374g.Therefore, the gear 374g that is used as the secondary gear of base for post side height adjustment mechanism never rotates by any external force.Gear 374g is only by rotating with gear meshing of the height adjustment mechanism that is arranged on fixed part.

To 26C, only the element that plays an important role at embodiment is described with reference to figure 22A.

Figure 27 shows another embodiment according to magnetic recording of the present invention and replay device.This embodiment and Fig. 3 are that the former has one and gear 185 and 195 meshed gears 515 to the difference of 5 illustrated embodiments.

Figure 28 A shows a base for post PBf in magnetic recording shown in Figure 27 and the replay device to 28C.The bottom of the axle 125 of guidepost GPf is inserted in the hole that is formed among the base for post PBf, and axle 12 can be moved slidably, is led by the wall surface in hole on moving direction simultaneously.

A coboundary 115 is fixed to axle 125, and a roller 135 has a length that equals the width of tape.A lower limb 545 is formed with the mate 55b of the distal portions of an engageable screw thread 525g, and screw thread 525g is arranged near the upper end of turning axle 525 of gear 465 of Figure 27.

In the operation of packing at tape, being arranged near the upper end of turning axle 535 of gear 535g far-end can be easily and the lower surface engagement of the mate 55b of lower limb 545, and mate 55b is provided with a sloping portion 55b1.An axle collar 605 is fixed to the lower end of axle 125.The axle collar 605 is provided with projection 65a and 65b, as the rotation brake device.

Axle 125 lower end and the detent 605 of guidepost GPf stretch in the groove 595 that is arranged among the base for post PBf, and projection 65a and 65b are not closely embedded respectively in the slit 615 and 625 among the base for post PBf.Spring 565 is located between the upper wall of the upper surface of detent 605 and groove 595.Guidepost GPf always is offset, thereby is pulled down by spring 565.A screw thread 525g and an internal thread 535g engagement that is formed in the projection 535 of rousing among the basic DBf.

When magnetic recording and replay device by the state variation that proceeds to half from the operation of packing into shown in Figure 27 during to state (not shown) that the operation of packing into is finished, the far-end of base for post PBf is connected to a basic pawl BCf, thereby base for post PBf is set to a groove position, and the fixed part of this position and magnetic recording and replay device has a preposition relation.

When magnetic recording and replay device were in the state that the operation of packing into is done, present state was: the far-end that is formed on the screw thread 525g in the top of lower surface and the turning axle 525 of gear 465 of mate 55b of far-end of lower limb 545 meshes.Here, lower limb 545 is used as parts, and these parts are as a part that is arranged on the component parts on the base for post side in the elevation control mechanism therefor.On the other hand, gear 465 is used as parts, and these parts are as a component parts that is arranged on fixation side in the elevation control mechanism therefor.

In magnetic recording of the present invention and replay device as shown in figure 27, record and replay operations have been finished pack into operation opening entry and replay operations afterwards at loading mechanism.Then, when motor Mg rotated, gear 465 was rotated by the gear 185,195 and 205 of power delivery system.When gear 465 rotation, be formed on the screw thread 535g engagement in screw thread 525g and the projection 535 that is formed among the basic DBf of drum in turning axle 525 tops of gear 465.Therefore, the turning axle 525 of gear 465 moves up and down according to sense of rotation.

When turning axle 525 rotations, be installed in a barricade 135 rotations of the position transducer PSf on turning axle 525 bottoms, and a position signalling is by interpretation device 245 outputs from position transducer PBf.And, when turning axle 525 moves up and down when rotating simultaneously, be formed on mate 55b in the far-end of lower limb 545 and also move up and down and move up and down with turning axle 525.Therefore, guidepost GPf moves up and down by the rotation of motor Mgf.

To explain embodiment shown in Figure 29 now.The magnetic recording that can be applied to Figure 27 shown in Figure 29 and the guidepost GPg of replay device have a structure, and an inclined surface 116b is formed in the upper surface of a coboundary 116 among the guidepost GPg in this structure.In structure shown in Figure 29, when the magnetic recording of Figure 27 and replay device have been finished when packing operation into, an engaged tapered surfaces 636g engagement of the inclined surface 116b of the upper surface of the coboundary 116 among the guidepost GPg and a meshing part 636, meshing part 636 is arranged on the turning axle 476 of gear 466, gear 466 is as parts, and these parts are as a component parts that is arranged on fixation side in the height adjustment mechanism.

When record with replay operations begins and the motor Mgf of Figure 27 when being rotated, rotated by gear shown in Figure 27 185,515,195 and 205 by power delivery system corresponding to the gear 466 of the gear 465 of Figure 27.Then, be formed on the internal thread 536g engagement in the projection 536 among screw thread 476g and the basic DBf of drum that is formed on Figure 27 in the bottom of turning axle 476, be used for its rotation.Therefore, the meshing part 636 that is arranged on the turning axle 525 of gear 466 moves up and down according to sense of rotation.Thereby move up and down with meshing part 636, guidepost GPg moves up and down by the rotation of motor Mgf.

Next, Figure 30,31A and 31B show the example that is arranged on the component parts on the fixed part in the height adjustment mechanism.Component parts is used to the height of control chart 28A to the guidepost GPf shown in the 28C.

At first, Figure 30 shows a projection 536 and L bracket 646 that is formed among the basic DB of drum.The hole 656 that is arranged on L bracket 646 bottoms be arranged on the basic DB of drum in projection 536 in hole 706 and 716 communicate, and L bracket 646 combines with projection 536 among the bulging basic DB.A pin 696 is inserted into hole 706 and 656 and 716.Therefore, L bracket 646 is rotatably connected to the projection 536 among the basic DB of drum, and pin 696 is as a turning axle.

In Figure 30, a barricade 136 among the reference position sensor PS is fixed to an end of the turning axle 476 of gear 466.The other end at turning axle 476 forms a screw thread 476g.Screw thread 476g is inserted into spring, then with an internal thread 686 engagements that are formed in the projection 536 of rousing among the basic DB.

When the screw thread 476g of the turning axle 476 of gear 466 the former with the projection 536 that is formed among the basic DB of drum in the state of internal thread 686 engagements under when being rotated, the L bracket 646 that is rotatably connected to the projection 536 among the basic DB of drum is around pin 696 rotations, thereby a far-end 646a of L bracket 646 laterally moves.

When being in, magnetic recording and replay device pack into when operating completion status, be formed on the surface engaged of the far-end 646a of the lower surface of mate 55b of far-end of the lower limb 545 of Figure 28 A in the 28C and L bracket 646, L bracket 646 is used as parts, and these parts are as a component parts that is arranged on fixation side in the elevation control mechanism therefor.

After loading mechanism has been finished the operation of packing into, when record and replay operations when beginning rotation motor Mgf, the gear 185,515,195 and 205 of the power delivery system by Figure 27, as mentioned above, gear 46 is rotated.When the screw thread 476g of the turning axle 476 of gear 466 with the projection 536 that is formed among the basic DB of drum in internal thread 686 engagements in when being rotated, contact, be formed on Figure 28 A with the surface of the far-end 646a of L bracket 646 and also move up and down to the mate 55b of the far-end of the lower limb 545 of 28C.Thereby by the rotation of motor Mgf, guidepost GPf moves up and down.In addition, when gear 465 rotations, turning axle 525 rotations of gear 465.Then, be installed in barricade 135 rotations of the reference position sensor PSf of turning axle 525 bottoms, and export a position signalling from the interpretation device 246 of position transducer PSf.

Next, Figure 31 A and 31B show a projection 537 and frame plate 737 that is formed among the basic DB of drum.A frame 77L is arranged on the frame plate 737.The barricade 137 of reference position sensor PS also is installed on the frame plate 737.On an end of frame plate 737, constitute an inclined surface 747.The upper surface of frame plate 737 is as a component parts that is arranged on fixation side in the control gear.Also be provided with the interpretation device 247 of position transducer PS.Frame plate 737 is slidably mounted in the groove 757.The frame 77L interlock of transmission gear 727 and frame plate 737.A gear 197 is installed on the turning axle 217 of transmission gear 727.

Gear 187 interlocks on gear 197 and the turning axle 157 that is installed in motor Mg.A barricade 167 that constitutes the part of rotary encoder RE also is installed on the turning axle 157 of motor Mg.An interpretation device 177 constitutes the part of rotary encoder RE.

When being in, magnetic recording and replay device finish when packing mode of operation into, be formed on the upper surface engagement of Figure 28 A to lower surface and the frame plate 737 of the mate 55b of lower limb 545 far-ends of 28C, frame plate 737 is as parts, and these parts are as a component parts that is arranged on fixation side in the elevation control mechanism therefor.

After loading mechanism has been finished the operation of packing into, when record and replay operations when beginning rotation motor Mg, as mentioned above, the gear 185 and 195 of the power transfer mechanism by Figure 27, transmission gear 727 is rotated, thereby moves up and down with the frame plate 737 of transmission gear 727 interlocks.Thus, the mate 55b that contacts with frame plate 737 upper surfaces, be formed on lower limb 545 far-ends also moves up and down.Thereby by the rotation of motor Mg, guidepost GP moves up and down.In addition, thereby when the frame plate 737 of transmission gear 727 rotation and transmission gear 727 interlocks moved up and down, the barricade 137 that is installed in the position transducer PS on the frame plate 737 also moved, and from position signalling of interpretation device 247 outputs of position transducer PS.

According to the present invention, the embodiment of guide roller (guidepost) GR will be described.

Shown in Figure 32 A and 32B, barricade 158 is Unitarily molded by resin.A lower limb 168 and an axle 508 are pressed into.After the phase place relevant with reference position sensor was conditioned, the mounting portion 158a of barricade 508 was loaded into the far-end 58a of axle 508.A major diameter part of barricade 158 is less than the overall diameter of upper and lower edge 168 and 178.The overall diameter of gear 188 is also less than the overall diameter of upper and lower edge 168 and 178.

Figure 33 is the opening of guide roller GR of key diagram 32A and 32B and the view of a tape cassete Ct.

Here show tape cassete Ct, a tape T, side opening Msup, a side opening Mtu and a bulging Dd.Also show a unloading position UL and the completing place LE that packs into of guide roller GR.

When tape cassete was mounted, guide roller GR entered opening Msup and the Mtu of tape cassete Ct, had some gaps between the wall of last lower limb 168 and 178, tape cassete Ct and tape T.

If the overall diameter of the gear 188 of the major diameter of barricade 158 part and Figure 32 A and 32B is greater than the overall diameter of last lower limb 168 and 178, their will rub sometimes wall and tape T of tape cassete Ct.But as mentioned above, they are less than the overall diameter of last lower limb 168 and 178, and friction does not produce.

After finishing the operation of packing into, a reference position sensor of fixed part is fixed near barricade 158 test sides of guide roller GR, and it will be a normal position.

Figure 34 A shows the embodiment of the guide roller GR shown in Figure 32 A and the 32B, and wherein, the mounting portion 159a of barricade 158 is pressed into a small diameter portion 169 of the coboundary 168 of Figure 32 A.Figure 34 B shows an embodiment, and in this embodiment, the mounting portion 159a of barricade 158 is pressed into an inside diameter part 169 of coboundary 168.

Except resin, barricade 158 can be formed by stamped sheet metal or other material with a resin fixed part and a metal plate sections.

According to aforementioned the present invention, according at record and the reference altitude data of the tape guidance device (guidepost or guide roller) that compatible calibrated altitude obtains in resetting be stored in the storer.Height adjustment mechanism is measured when the tape tape guidance height of devices when being done of packing into, and with reference to the data of storing their height is adjusted to calibrated altitude.Thereby can in magnetic recording with identical recordings and playback standard and replay device, realize the record and the replay device of highly compatible.

In addition, according to the present invention, the tape guidance height of devices that is separately positioned on supply reel and take-up spool side can be conditioned by the closed loop automaton under the control signal, and control signal is based on that crooked data on the recording track on the standard reference tape produce.Only, realize automatic tape guidance height control by the standard reference tape of in loading adjusting, resetting.

In addition, according to the present invention, the recoil amount of a gear of the power delivery system of magnetic recording and replay device is used as the umber of pulse of rotary encoder generation and measures, and is used to proofread and correct the tape guidance height of devices.This has realized accurate tape guidance height adjusting.

In addition, according to the present invention, the tape guidance device that is separately positioned on supply reel and take-up spool side in height is moved, to proofread and correct the track bending, wherein when record and normal playback, a position that is used for the travel mechanism of mobile tape guide piece on short transverse can be conditioned, and when record and normal playback, this position always is held.Because adjustment cam has the plane of certain width, the position of sensor need not be limited.

Thereby, by solving the problem of common magnetic recording and replay device, the present invention has realized a kind of magnetic recording and replay device that is used to proofread and correct the track bending, the problem that is solved is as (1) detection degree of accuracy and the change after experience a period of time owing to sensor, and the record of tape guidance device and normal playback position may change; (2) owing to the running and the recoil of driven wheel, the play capability of record and normal playback position is with destroyed; (3) under a rotation detection dish was installed in situation on the tape guidance device, if the rotation of tape guidance device surpasses once, record and normal playback position can not be detected.

In addition, according to the present invention, the major diameter part and being used to of barricade that is used to measure the position of tape guidance device drives the overall diameter of gear of tape guidance device less than the diameter of the last lower limb of tape guidance device.This structure can be avoided the destruction to tape guidance device or tape cassete that may take place when tape cassete is inserted into or take out, barricade or driven wheel will contact the tape cassete wall.

In addition, according to the present invention, a mounting portion of barricade that is used to measure the position of tape guidance device is formed by an elastic body, and by being pressed into and a small diameter portion of the coboundary of the tape guidance device of packing into or be pressed into and the axle of the extend through coboundary of packing into, this mounting portion is locked.This structure can solve the problem of common magnetic recording and replay device, as the increase of trip bolt number of steps; Head of screw protrudes on barricade; And, can't consider the tolerance that is pressed into of coboundary and axle because threaded hole is had in the edge.

Claims (17)

1. magnetic recording and replay device comprise:

Tape is around a supply reel and a take-up spool of its winding;

Be arranged near the tape guidance device of rotating magnetic head of supply reel and take-up spool side,

It is characterized in that,

Described tape guidance device can move on the tape width direction;

Described magnetic recording and replay device also comprise:

A driver that is used for mobile tape guide piece on the tape width direction;

One has an interpretation Device Testing device that matches with the barricade of each tape guidance device, described detecting device is used to detect each tape guidance height of devices, and this detecting device produces one first reference signal when any one tape guidance device is moved to first reference altitude on first direction at least, and this detecting device produces one second reference signal when any one tape guidance device is moved to second reference altitude on the second direction opposite with the first direction of tape width at least;

A counter that is used to calculate the umber of pulse that when any one tape guidance device is moved at least, produces; With

A storer, be used to store first umber of pulse of when first reference signal produces, calculating, with second umber of pulse of calculating when second reference signal produces, driver moves one of them tape guidance device at least based at least one first difference between first and second umber of pulses.

2. according to the device of claim 1, it is characterized in that driver is moved upward to few one of them tape guidance device based on first and second umber of pulses in first party, be moved upward to few one of them tape guidance device based on first difference in second party simultaneously.

3. according to the device of claim 1, it is characterized in that, driver is moved upward to few one of them tape guidance device based on the number less than a regulation of first difference in first party, is moved upward to few tape guidance device based on second difference between the number of first difference and regulation in second party simultaneously.

4. according to the device of claim 1, it is characterized in that, also has a regulator, described regulator has an offset assembly and a detent, the former is used for being offset in one direction each tape guidance device, and the latter is used for each tape guidance device is remained on a fixing height.

5. according to the device of claim 1, it is characterized in that, each tape guidance device is set on the base for post, one of them tape guidance height of devices of first time changing that regulator is packed at the beginning tape, also pack into stop before the height of the second time changing base for post of moment, thereby be carved into the specified altitude that second moment kept tape from first o'clock.

6. according to the device of claim 1, it is characterized in that, regulator has an inclined surface and a plane, two surfaces all contact the part of each tape guidance device, be used to regulate each tape guidance height of devices, also contact the part of each tape guidance device at record and playback midplane.

7. according to the device of claim 1, it is characterized in that each tape guidance device is set on the base for post, base for post has a detent, is no more than once to limit each tape guidance device rotation.

8. according to the device of claim 1, it is characterized in that each tape guidance device is provided with a turning axle, this turning axle is formed by a screw thread with a gearing mesh of regulator, and this device further comprises the device of the recoil that is used to prevent screw thread.

9. according to the device of claim 1, it is characterized in that each tape guidance device can be in its axial adjusted on one and on lower part.

10. according to the device of claim 9, it is characterized in that each tape guidance device is by a spring scalable on the upper and lower part.

11. the device according to claim 1 is characterized in that, each tape guidance device is formed with one to be gone up and a lower limb, and the diameter of barricade is less than the diameter at upper and lower edge.

12. device according to claim 1, it is characterized in that, each tape guidance device is provided with a turning axle, this turning axle is formed with a screw thread with a gearing mesh of regulator, and each tape guidance device is formed with one to be gone up and a lower limb, and the diameter of gear is less than the diameter at upper and lower edge.

13. device according to claim 1, it is characterized in that, each tape guidance device is provided with a barricade, this barricade is formed by an elastic body that cooperates with an interpretation device of first detecting device, first detecting device is used to detect each tape guidance height of devices, each tape guidance device is formed with one to be gone up and a lower limb, and barricade is pressed into and a specified diameter part of the coboundary of packing into.

14. device according to claim 1, it is characterized in that, each tape guidance device is provided with a turning axle and a barricade, this barricade is formed by an elastic body that cooperates with an interpretation device of first detecting device, first detecting device is used to detect each tape guidance height of devices, each tape guidance device is formed with one to be gone up and a lower limb, barricade be pressed into and the part axle of the extend through coboundary of packing in.

15. device according to claim 1, it is characterized in that each tape guidance device is provided with a barricade, this barricade cooperates with an interpretation device of first detecting device, first detecting device is used to detect each tape guidance height of devices, and barricade is formed by resin.

16. device according to claim 1, it is characterized in that each tape guidance device is provided with a barricade, this barricade cooperates with an interpretation device of first detecting device, first detecting device is used to detect each tape guidance height of devices, and barricade is formed by metal.

17. device according to claim 1, it is characterized in that, each tape guidance device is provided with a barricade, this barricade cooperates with an interpretation device of first detecting device, first detecting device is used to detect each tape guidance height of devices, and this barricade has fixed part and plate part that metal forms that a resin forms.

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