JP2001176149A - Tape device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape device which is reduced in its size and cost even if the device uses selectively plural cassettes. SOLUTION: A reel drive means is engaged with a reel and drives this reel that is usually kept at a position where the moving action of the reel is never prevented on a chassis and then set at a position corresponding to each of plural cassettes when a tape is taken up in an emergency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tape device capable of selectively recording and reproducing a plurality of tape cassettes having different reel positions.

[0002]

2. Description of the Related Art In recent years, with the digitization and high quality of broadcasting, a huge amount of recording capacity is required in order to record signals such as video images. Despite advances in signal compression technology, tape drives that are inexpensive, record in large quantities, and have high operation reliability still form a large market for recording and reproducing devices.

[0003] In a helical scan type tape device such as a video tape recorder (hereinafter abbreviated as VTR), in order to record and reproduce signals, a cassette is first mounted on a mechanical chassis, and then the tape is rotated by a pull-out post. It is necessary to wind the cylinder on a predetermined angle. An actuator such as a motor is generally used for the tape loading operation and the reverse operation of the tape unloading operation from the viewpoint of tape protection and the like.

Therefore, in the event of an emergency when power supply to the apparatus is stopped during recording and reproduction, unloading means different from the actuator is required to quickly and safely take out the cassette from the apparatus.

[0005] On the other hand, devices that can selectively use a plurality of cassettes having different sizes according to the intended use even with the same recording format have been put on the market by various companies. As an example, there is a method of realizing the function by moving a pair of reels for a large / small cassette having substantially the same opening shape on the front surface of the cassette.

Hereinafter, a conventional tape device will be described with reference to the drawings.

FIG. 19 is a plan view showing a tape traveling path and a reel moving path of a conventional tape device, and FIG. 20 is a plan view showing an emergency tape winding configuration of the conventional tape device. A drawer post 101 for pulling out the tape in the cassette is housed in an opening 100 on the front surface of the cassette. Each drawer post 101 can be reciprocated between a storage position shown by a broken line and a drawer position shown by a solid line via a unique path by a manual driving means (not shown). After the tape is pulled out, signals are recorded and reproduced by winding a tape at a predetermined angle around a rotary head cylinder 103 mounted on the chassis 102. The chassis 102 is provided with a supply-side reel motor 104 and a take-up-side reel motor 105.
The tape is fed at a constant speed by a capstan 106 and a pinch roller 107 on the tape 02 and plays a role of giving a predetermined back tension. In addition, both reel motors can be moved with respect to the chassis 102 as shown by arrows so as to be able to handle two types of cassettes having different reel positions.

On the other hand, as shown in FIG.
A take-up rod 108 is provided slidably with respect to 2 and is urged in the direction of arrow A by a return spring 109. A relay gear 110 provided adjacent to the left side of the supply-side reel motor 104 is engaged with the winding rod 108 and the tape winding gear 111. When the winding rod 108 slides against the urging force of the return spring 109, the tape winding gear 111 revolves around the rotation axis of the relay gear 110, and rotates after contacting the outer periphery of the supply-side reel motor 104. Thus, the supply-side reel motor 104 can be rotated counterclockwise. A drive gear (not shown) is configured to perform reciprocal movement of the winding rod 108 and movement of the drawer post 101 from the drawn position to the storage position while synchronizing the movement. In addition, the drive gear (not shown) is not a special motor but can be manually driven from outside the apparatus.

In the tape device constructed as described above, when the supply of power is cut off and it is necessary to take up the tape in the cassette urgently, first, a drive gear (not shown) is operated manually to take up the take-up rod. Activate 108.
When the take-up rod 108 moves in the direction of arrow B, the tape take-up gear 111 moves to the supply side reel motor 1 as described above.
04 in the counterclockwise direction, while the winding rod 108
Is moved in the direction of arrow A by the urging force of the return spring 109, the tape winding gear 111
Separate more. Therefore, each time the winding rod 108 reciprocates by a driving member (not shown), the tape winding gear 11
At the same time as the winding of the tape by 1 is performed, the pull-out post 101 moves from the pull-out position to the storage position in synchronization with this, and the tape is wound into the cassette.

[0010]

However, the above conventional structure has the following problems.

In other words, when the tape take-up gear 111 is at the position shown in FIG. 20 when it is not operated, when the large cassette shown by the two-dot chain line is used, it is at a position where the movement operation of the supply side reel motor 104 is not hindered. Since it is necessary to evacuate, special evacuation means and evacuation space must be secured. In addition, when a large cassette is to be wound, a special tape winding means or a winding rod 108 is required.
Therefore, there is a problem that an evacuation space including the above is required, which is an obstacle to downsizing and cost reduction.

The present invention solves the above-mentioned conventional problems, and provides a tape device which has a function of manually winding a tape in a plurality of cassettes in an emergency, and which can be reduced in size and cost. The purpose is to do.

[0013]

In order to solve the above-mentioned conventional problems, a tape device according to the present invention comprises a retracting position in which a tape winding gear does not hinder the movement of a reel and a reel position corresponding to a plurality of cassettes. And a reciprocating mechanism.

With this configuration, a tape device having an emergency tape winding function suitable for miniaturization and cost reduction can be realized even if the device selectively uses a plurality of cassettes.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applicable to a plurality of cassettes, a chassis, a reel which can reciprocate on the chassis at a position corresponding to the plurality of cassettes, a retracted position which does not hinder the movement of the reels. And a reel driving means for reciprocating to a plurality of operating positions for driving the reel by engaging the reel taking the position.With such a configuration, only the reel driving means performs the reel moving operation. The operation is performed without hindrance, and the number of parts can be reduced and the size can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is a plan view showing a chassis configuration when the tape device of the present invention is at a loading completed position.
2 is a plan view showing the configuration of the chassis when the unloading is completed, FIG. 3 is an exploded sectional view of FIG. 1 when emergency tape winding is not performed, and FIG. 4 is a view when emergency tape winding is performed. 5, FIG. 5 is an exploded sectional view of FIG. 1 showing a tension post driving means described later, FIG. 6 is a plan view showing a main driving means of the tension post at a loading completed position, and FIG. 7 is an unloading completed position. FIG. 8 is a plan view of a later-described emergency relay gear, FIG. 9 is a cross-sectional view taken along the line Z-Z of FIG. 8, and FIG. 10 is a first relay gear of FIG. X
11 to 13 are plan views showing a tape winding operation, FIGS. 14 and 15 are plan views showing an operation at the time of a tape winding erroneous operation, and FIGS. 16 and 17 show operations of an idler arm described later. FIG. 5 is a view taken in the direction of the arrow V in FIG. 4.

Since the tape running path is the same as that of the conventional example, the description thereof is omitted, and a tension post is used as a representative example for explaining the tape pulling-out operation.

As shown in FIG. 1, a pair of reel motors of a supply-side reel motor 2 and a take-up side reel motor 3 provided on a chassis 1 are adapted to selectively mount a large cassette, a standard cassette and a small cassette on the apparatus. To be able to move, they are movably supported at three positions of two-dot chain line, solid line and one-dot chain line, respectively. When the power is supplied, the supply-side reel motor 2 rotates counterclockwise during the tape unloading operation so that the tape can be wound up by a predetermined amount. Note that a description of specific moving mechanisms and positioning mechanisms of the supply-side reel motor 2 and the take-up reel motor will be omitted.

As shown in FIG. 3, the worm 5 pressed into the rotating shaft of the loading motor 4 provided on the chassis 1 meshes with a worm wheel 6 rotatable with respect to a shaft 50 set on the chassis 1. are doing. Here, since the advance angle of the worm 5 is appropriately set so that the worm 5 is not rotated by the worm wheel 6, the loading motor 4 cannot be rotated even if various gears described later are rotated. .

The first relay gear 7 meshing with the worm wheel 6 at the large gear portion 7a is connected to a rotating shaft 5 provided on the chassis 1.
The collar 8 is rotatably supported by a collar 8 which can be moved up and down in the axial direction. The first relay gear 7 has a two-stage configuration including a large gear portion 7a and a small gear portion 7b. The large gear portion 7a is provided with an input gear 9 rotatably supported by a shaft 53 implanted in the chassis 1.
Is also engaged. On the other hand, the small gear portion 7b meshes with the second relay gear 10 supported by the chassis 1. Color 8
Is always urged in the direction of arrow A in FIG. 3 by the urging spring 11, so that when the first relay gear 7 receives a thrust force in the direction of arrow B in FIG. It can be lowered integrally with the relay gear 7.
At this time, when the first relay gear 7 descends, the engagement with the worm wheel 6 can be released as shown in FIG. In addition, the collar 8 is restricted in the ascending limit position by the cut washer 12 for retaining. Since the distance s from the upper surface of the collar 8 to the thrust receiving portion of the first relay gear 7 is set slightly longer than the bearing length t of the first relay gear 7, the first relay gear 7 is It can rotate without receiving a load torque based on the urging force of the urging spring 11.

As shown in FIG. 8, the emergency relay gear 13 connected to the first relay gear 7 via the collar 8, the urging spring 11, and the rotating shaft 51 has a small size. Two internal gear portions 13a that can mesh with the gear portion 7b are formed. Incidentally, as shown in FIGS. 9 and 10, the tips of the gears of the small gear portion 7b and the internal gear portion 13a are tapered, and the tip of the internal gear portion 13a is located at a position protruding as compared with other portions. It has been set. Therefore,
When the first relay gear 7 descends, the emergency relay gear 1
Regardless of the phase of the first relay gear 7 with respect to 3,
It can be securely engaged. In addition, the first relay gear 7 is set to have such a movement stroke that the first relay gear 7 can mesh with the emergency relay gear 13 after the engagement with the worm wheel 6 is completely released.

On the other hand, a main rod 14 guided by an elongated hole 1a and a guide pin 1b provided in the chassis 1 is provided so as to be reciprocally movable.
Is constantly urged in the direction of arrow B in FIG. further,
As shown in FIGS. 1 and 11, a sub-rod 16 is provided slidably with respect to the main rod 14, and the sub-rod 16 is constantly urged in the direction of arrow A by a torsion coil spring 17 provided between the main rod 14 and the torsion coil spring 17. ing. That is, when no external force other than the torsion coil spring 17 acts on the sub-rod 16, the position of the sub-rod 16 with respect to the main rod 14 is uniquely determined. Further, a projection 13 b provided on the back surface of the emergency relay gear 13 can be brought into contact with the bent portion 16 a of the sub rod 16. Therefore, as shown in FIGS. 1 and 11, when the emergency relay gear 13 rotates clockwise, the main rod 14 can move in the arrow A direction via the sub rod 16 against the urging force of the extension spring 15. It has become. On the other hand, when the emergency relay gear 13 rotates counterclockwise, only the sub-rod 16 slides in the direction of arrow B against the biasing force of the torsion coil spring 17 while the main rod 14 remains stationary. The protrusions 13b are formed at three locations on the same circumference at a pitch of about 120 degrees.
As shown in FIGS. 11 to 13, when one of the protrusions 13 b moves in the direction of arrow A while abutting on the bent portion 16 a and separates from the bent portion 16 a,
The main rod 14 and the sub-rod 16 move integrally in the direction of arrow B by the urging force of the tension spring 15. Immediately after this, one of the other projections 13b can be brought into contact with the bent portion 16a of the sub rod 16.

That is, the clockwise continuous rotational movement of the emergency relay gear 13 is converted into a substantially continuous reciprocating movement of the main rod 14 integrated with the sub rod 16, and the counterclockwise movement of the emergency relay gear 13 Is converted only into a continuous reciprocating motion of the sub-rod 16.

In addition, an idler arm 18 is provided rotatably with respect to the idler shaft 1c erected on the chassis 1. Further, the boss 4 formed integrally with the idler arm 18 is provided.
An idler center gear 19 is provided rotatably with respect to 0, and meshes with the rack portion 14a of the main rod 14. The idler center gear 19 is connected to an idler clutch gear 21 via an idler relay gear 20 pivotally supported on the idler arm 18. The idler clutch gear 21 is connected via a felt 22 to an idler pulley 23 containing a rubber belt portion 23a, and is provided with a clutch spring 24 for generating a predetermined clutch torque. The idler pulley 23 comes into contact with the outer peripheral portion of the supply-side reel motor 2. Therefore, when the load torque of the supply-side reel motor 2 increases, that is, when the tape tension in the supply-side reel increases to a predetermined value or more, the idler clutch gear 2
1, the idler pulley 23 is configured to prevent the tape from being over-tensioned by slipping.

As shown in FIG. 1, the initial position of the idler arm 18 is set at a position that does not intersect the movement path of the reel position corresponding to each cassette in a plane, and is set on the idler arm 18. The pin 18a can be positioned so that the idler arm 18 cannot be rotated in the counterclockwise direction in FIG. 1 from the initial position. When the idler arm 18 revolves, FIG.
As shown by the one-dot chain line in FIG.
The main rod 1 is configured to be able to contact the outer periphery of the supply-side reel motor 2 corresponding to the type of cassette.
The stroke of 4 is set to a value sufficient to rotate the supply-side reel motor 2 after the idler arm 18 revolves to the reel position corresponding to the large cassette. Also,
As shown in FIGS. 16 and 17, an arm engaging portion 19 a is provided on the back surface of the idler center gear 19,
Usually, an arc-shaped long hole 18b formed in the idler arm 18
Abuts on the end face 18c of the rim. Then, as shown in FIG. 17, the arm engaging portion 19a is connected to the end face 18c of the arc-shaped long hole 18b.
When the idler center gear 19 rotates clockwise from a more separated state, the idler arm 18 can be forcibly rotated clockwise by the arm engagement portion 19a abutting against the end face 18c of the arc-shaped long hole 18b. It has a configuration that can be used. In addition, the clutch spring 2 is driven so that the driving force of the main rod 14 by the tension spring 15 becomes sufficiently large with respect to the load caused by the clutch torque.
4 and the urging force of the tension spring 15 are appropriately set.

Next, the driving configuration of the tension post 25, which is one of the drawing posts, will be described.

As shown in FIGS. 1 and 5, a cam gear 26 meshing with the second relay gear 10 is rotatably supported around a cam gear shaft 1d on the chassis 1, and has a cam groove 2
6a. A follower arm 27 rotatably provided around an axis erected on the chassis 1 is engaged with a cam groove 26a and is provided in a slot 28a of a drive rod 28 provided slidably with respect to the chassis 1. The driving rod 28 can be driven by the engagement. The cam gear 26 is formed with a cam groove 26a so that it can rotate clockwise around the cam gear shaft 1d and rotate the follower arm 27 counterclockwise during tape winding, that is, unloading. Also,
A sector arm 29 rotatably supported around a sector shaft 1e erected on the chassis 1 is provided with a sector pin 29a.
Can be driven by engaging a drive cam portion 28b formed on the drive rod 28. As shown in FIGS. 6 and 7, the drive cam portion 28b is composed of three portions, a first flat portion 28c, a lift portion 28d, and a second flat portion 28e. Accordingly, when the drive rod 28 slides leftward from the position shown in FIG. 2, the sector arm 29 can rotate counterclockwise. A gear portion 29b provided on the outer periphery of the sector arm 29
Are meshed with a tension post drive gear 30 which is rotatably supported by an arm shaft 1f erected on the chassis 1. Further, a sector spring 31 is stretched between the sector pin 29a and the chassis 1. Here, the sector spring 3
Numeral 1 is provided at a position where a rotational moment counterclockwise around the sector axis 1e is applied at the position shown in FIG. 7 and a rotational moment clockwise around the sector axis 1e is provided at the position shown in FIG. Therefore, when the sector pin 29a engages with the first flat portion 28c and the second flat portion 28e, each comes into contact with the side shown by oblique lines. In other words, the sector spring 31 has a function of absorbing backlash existing between the gear portion 29b formed on the sector arm 29 and the tension post driving gear 30, and a function of absorbing backlash caused by the looseness between the sector pin 29a and the driving cam portion 28b. Have.

On the other hand, as shown in FIG. 2, the tension arm 32 having the tension post 25
It is rotatably supported above and is connected to a tension post drive gear 30 via a tension spring. The tension spring constantly urges the tension arm 32 counterclockwise around the arm axis 1f. The torque of the supply reel motor 2 can be controlled by the position of the tension arm 32.

The operation of the tape device configured as described above will be described below.

First, the operation of winding the tape by driving the motor from the tape pull-out position shown in FIG. 1 will be described.

The sector arm 29 is stopped by the sector spring 31 in contact with the end face of the second flat portion 28e on the oblique line side, and the tension arm 32 is stopped at a predetermined position where the tape is pulled out. The loading motor 4 and the supply-side reel motor 2 start rotating in response to a tape unloading command such as an ejection.
The supply-side reel motor 2 rotates counterclockwise to take up the tape in the cassette.

On the other hand, when the loading motor 4 rotates, the driving force of the loading motor 4 is transmitted to the first relay gear 7 via the worm 5 and the worm wheel 6.
Here, as shown in FIG. 3, the urging force of the urging spring 11 separates the first relay gear 7 and the emergency relay gear 13 so that the emergency relay gear 13 does not rotate. Accordingly, the first relay gear 7 is connected to the second gear by the small gear portion 7b.
At the same time that the input gear 9 is rotated by the large gear portion 7a of the relay gear 10, the main rod 14, the sub rod 16, the idler arm 18, and various gears on the idler arm 18 are stationary with respect to the chassis 1. . In conjunction with the rotation of the second relay gear 10, the cam gear 26 rotates clockwise around the cam gear shaft 1d to rotate the follower arm 27 counterclockwise. The drive rod 28 engaged with the follower arm 27 slides rightward. Sector pin 2
9a moves the engagement point from the second flat portion 28e to the lift portion 28d, so that the sector arm 29
Rotates counterclockwise around the sector axis 1e. In conjunction with this operation, the tension arm 32 on which the tension post 25 is mounted starts rotating clockwise via the tension post drive gear 30 meshing with the sector arm 29.

Thereafter, the sector spring 31 is moved to the lift 28
When the drive rod 28 further moves rightward by the follower arm 27 after being slightly bent in the middle of d, the sector pin 29a engages with the first flat portion 28c.
Accordingly, the tension arm 32 linked to the sector arm 29 further rotates clockwise to reach the position shown in FIG. At this time, since the sector arm 29 is urged counterclockwise around the sector axis 1e by the sector spring 31, the tension arm 32 is urged clockwise, that is, in the unloading direction, and stops.
Thus, during driving by the loading motor 4,
Only the posts involved in the tape withdrawal will move.

Next, the operation of manually winding the tape without using electric power will be described.

In FIG. 3, first, the input gear 9 is moved
Move in the direction. Then, the first relay gear 7 releases the meshing of the large gear portion 7a with the worm wheel 6.
Here, even if the input gear 9 is erroneously bidirectionally rotated at the height shown in FIG. 3, the first relay gear 7 cannot be rotated because it is locked between the worm 5 and the worm wheel 6. After the engagement with the worm wheel 6 is released, the first
The small gear portion 7b of the relay gear 7 abuts on the internal gear portion 13a of the emergency relay gear 13 while maintaining meshing with the second relay gear 10. Further, when the first relay gear 7 is pushed in the direction of arrow B by the input gear 9, a rotational moment is generated between the two gears due to the tapered shape of the two gears, so that at least one of the gears slightly rotates. The first relay gear 7 is completely meshed with the emergency relay gear 13 at the time when the tooth tip and the tooth bottom are engaged. Further, when the tooth tip of the small gear portion 7b and the tooth bottom of the internal gear portion 13a substantially coincide with each other, the first relay gear 7 meshes with the emergency relay gear 13 without depending on the tapered shape. I do. Thus, the input gear 9 and the emergency relay gear 13 are connected.

When the input gear 9 is rotated counterclockwise in FIG. 1 with the first relay gear 7 and the emergency relay gear 13 shown in FIG. 4 meshing with each other, the first relay gear 7 and the emergency relay gear 13 Rotate in the direction. Focusing on the drive system to the tension post 25, the first relay gear 7
The cam gear 26 rotates clockwise via the second relay gear 10 always meshing with the cam gear 26. In synchronization with this rotation of the cam gear 26, the follower arm 27 also rotates counterclockwise to slide the drive rod 28 rightward with respect to the chassis 1. Further, the sector pin 29a is moved from the second flat portion 28e to the first flat portion 28 via the lift portion 28d.
c, the sector arm 29 rotates counterclockwise around the sector axis 1e.
Stand still. In conjunction with this operation, the tension post 25
The tension arm 32 equipped with the sector arm 29
The clockwise rotation is carried out via the tension post drive gear 30 meshing with the, and is urged in the unloading direction by the urging force of the sector spring 31 to stand still.

On the other hand, attention will be paid to the transmission system after the emergency relay gear 13. When the emergency relay gear 13 rotates clockwise by the input gear 9 moved in the direction of arrow B by a predetermined amount, as shown in FIG.
Is in contact with the bent portion 16a of the sub rod 16. Therefore, the sub rod 16 and the main rod 14 start sliding in the direction of the arrow A integrally. When the emergency relay gear 13 further rotates against the urging force of the extension spring 15, the projection 13b starts to separate from the bent portion 16a of the sub-rod 16 through the state shown in FIG. At the moment when the engagement between them is released, the main rod 14 and the sub-rod 16 return quickly in the direction of arrow B by the urging force of the tension spring 15. And immediately after that, Figure 1
As shown in FIG. 3, the next projection 13b is bent at the bent portion 16a.
The sub rod 16 and the main rod 1 again
4 is integrally moved in the direction of arrow A. As described above, when the emergency relay gear 13 rotates continuously, the sub rod 16 and the main rod 14 integrally and substantially reciprocate in synchronization with the operation.

Next, the operation of the idler arm 18 and the various gears provided thereon when the main rod 14 makes such a continuous reciprocating motion will be described. In FIG. 11, the idler center gear 19 meshing with the rack portion 14a of the main rod 14
When it moves in the direction, it starts rotating clockwise around the idler shaft 1c. Then, the idler arm 18 rotates clockwise around the idler shaft 1c by the clutch action. When the main rod 14 further moves in the direction of arrow A after the idler pulley 23 contacts the outer periphery of the supply-side reel motor 2, the idler relay gear 20 rotates counterclockwise in conjunction with the idler center gear 19. At the same time, the idler clutch gear 21 rotates clockwise. Therefore,
The supply-side reel motor 2 rotates counterclockwise through the idler pulley 23 to wind up the tape. When the supply-side reel motor 2 starts rotating, the idler arm 1
8 is stationary at the position shown in FIG. 13 or FIG. 17, and the arm engagement portion 19a of the idler center gear 19 is in the arc-shaped long hole 1 of the idler arm 18 as shown in FIG.
8b is separated from the end face 18c. Thereafter, when the main rod 14 is quickly returned in the direction of arrow B by the urging force of the tension spring 15, the idler center gear 19 in FIG.
Is given a clockwise rotational moment, and the idler arm 18 starts rotating clockwise around the idler shaft 1c due to the load action by the clutch torque.
3, idler clutch gear 21 and idler relay gear 2
0 revolves. Here, during the rotation of the idler arm 18, the idler center gear 19, the idler relay gear 20, the idler clutch gear 21 and the idler pulley 23 are stationary with respect to the idler arm 18. Therefore, the arm engaging portion 19a of the idler center gear 19
Remains separated from the end face 18c of the arc-shaped long hole 18b. Thereafter, when the idler arm 18 reaches the initial position outside the movable range of the supply-side reel motor 2 as shown in FIG. 16, and is positioned by the pin 18a, the rotation of the idler arm 18 ends. Further, the idler center gear 19 is connected to the main rod 14 as shown in FIG.
When rotated clockwise, the idler pulley 23 rotates clockwise via the idler relay gear 20 and the idler clutch gear 21, but does not slack the tape because it is already separated from the supply-side reel motor 2. Then, since the idler arm 18 is already stationary, the arm engagement portion 19a of the idler center gear 19 rotates toward the end face 18c of the arc-shaped long hole 18b, and thereafter, both come into contact with each other and stop.

As described above, the idler arm 18 is rotated by the reciprocating motion of the main rod 14, and after the supply-side reel motor 2 is rotated in the tape winding direction by a predetermined amount, the reel movement is prevented without sagging the tape. It will be retracted to the initial position where it does not exist. Moreover, since the idler center gear 19 and the rack portion 14a of the main rod 14 are always engaged, even if a counterclockwise moment in FIG. 17 acts on the idler arm 18, the idler arm 18 is forcibly moved to the initial position. It can be moved reliably. The reciprocating motion of the main rod 14 occurs every time the projection 13b of the emergency relay gear 13 engages with the bent portion 16a of the sub-rod 16, and as described above, a specific projection 13b is separated from the bent portion 16a. Then, immediately after the main rod 14 is quickly returned by the tension spring 15, another protruding portion 13b can be brought into contact with the bent portion 16a of the sub rod 16. Therefore, while the input gear 9 is being rotated at the pushing position shown in FIG. 4, the tape winding operation by the idler arm 18 and the retreat of the idler arm 18 are repeated almost continuously via the emergency relay gear 13. become. In this way, the tape can be gradually taken up by the reciprocating rotation of the idler arm 18 while passing through the initial position many times. Although the tape tension on the supply reel changes according to the tape winding diameter on the supply reel, an appropriate clutch torque is set, so that when the tape tension exceeds a predetermined value, the idler pulley 23 The supply side reel motor 2 is driven while slipping with respect to the clutch gear 21.

Even if the position of the reel differs depending on the cassette to be used, the above-described series of operations is basically the same, and therefore the operation when another cassette is used will be omitted.

Next, the operation when the input gear 9 is reversed by mistake will be described.

As shown in FIG. 4, the input gear 9 is pushed in the direction of arrow B, and the input gear 9 is rotated clockwise in FIG. 14 in a state where the engagement between the worm wheel 6 and the first relay gear 7 is released. Then, the emergency relay gear 13
Is rotated counterclockwise, and the projection 13b is
Abut on the bent portion 16a. Since the main rod 14 is urged in the direction of arrow B by the tension spring 15 and is stationary, it remains stopped even if it receives a force in the direction of arrow B such as a frictional force from the sub-rod 16. Accordingly, the idler center gear 19 meshing with the main rod 14 is also stopped, and the above-described supply side reel motor 2 is not driven. As shown in FIG. It moves in the direction of arrow B against the urging force of the spring 17. The projection 13b is bent at the bent portion 16a.
When the torsion coil spring 17 is further released, it returns to the original position shown in FIG. 14 by the urging force of the torsion coil spring 17, and this series of operations is repeated each time the projection 13b comes into contact.

On the other hand, focusing on the tension post drive system after the second relay gear 10, the operation reverse to the operation described above is performed. That is, in FIG. 2, the cam gear 26 rotates counterclockwise, the follower arm 27 rotates clockwise, and the drive rod 28 slides leftward. The sector arm 29 rotates clockwise around the sector shaft 1e in conjunction with this, and the tension arm 32 rotates counterclockwise via the tension post drive gear 30.
Therefore, the tape is pulled out, but the tape is not wound up, and no excessive tape tension is generated. In this way, the protection of the tape in the event of a malfunction can also be guaranteed.

In this embodiment, the clutch mechanism is used in a substantial part for driving the supply-side reel motor 2, but the present invention is not limited to this. For example, when the moving distance between the pair of reels is extremely small and the rotation angle of the idler arm 18 does not greatly differ depending on the cassette used, or when the change in the tape diameter is small, as shown in FIG. The pulley 23 and the idler clutch gear 21 may be integrated. At this time, the spring force of the clutch spring 24 is
Can be set to the minimum necessary to rotate the input gear 9 and the urging force of the tension spring 15 can be reduced accordingly, so that the input gear 9 can be rotated with a lower load than in the present embodiment. There is an advantage that can be.
When the tape winding diameter on the supply side is large, the tape winding amount is large. However, the arm connected to the drive system by a spring, such as the tension arm 32, has a difference in the tape winding amount due to the difference in the winding diameter. Can be absorbed, and the function of the clutch mechanism can be complemented.

In this embodiment, the input gear 9 always meshes with the first relay gear 7, but this is not always limited to this. For example, when the post drive system is normally driven by the loading motor 4, the input gear 9 and the first relay gear 7 may be separated from each other, and may be engaged for the first time at the time of manual operation. For example, there is an advantage that the device is made quieter due to the reduction in the number of meshing portions.

Further, in this embodiment, the input gear 9 is provided as a manually operated gear. However, a configuration in which the first relay gear 7 is directly driven may be used.

[0048]

As described above, the first invention comprises a chassis, a reel capable of reciprocating on a chassis at a position corresponding to a plurality of cassettes, a retracted position which does not hinder the reel moving operation, and a plurality of retractable positions. A reel driving unit that reciprocates between a plurality of operating positions capable of driving the reel by engaging with a reel taking a position corresponding to the cassette, so that the only reel driving unit does not hinder the reel moving operation. Since it operates, it is not necessary to provide a reel driving means independently for the cassette to be used, and a high cost performance apparatus can be provided. Moreover, since there is no need to retreat the reel driving means when using another cassette, the apparatus can be downsized, and its practical effect is great.

[Brief description of the drawings]

FIG. 1 is a plan view showing a chassis configuration of a tape device according to an embodiment of the present invention at a loading completed position.

FIG. 2 is a plan view showing a chassis configuration when the chassis is at an unloading completed position.

FIG. 3 is an expanded sectional view of FIG. 1 when the emergency tape winding is not performed.

FIG. 4 is an expanded sectional view of FIG. 1 when the emergency tape winding is performed.

FIG. 5 is an expanded sectional view of FIG. 1 showing a driving means of the tension post.

FIG. 6 is a plan view showing main driving means of the tension post at the loading completion position.

FIG. 7 is a plan view showing the main driving means of the tension post at the unloading completed position.

FIG. 8 is a plan view of the emergency relay gear.

9 is a sectional view taken along the line ZZ in FIG.

FIG. 10 shows a tape device according to the embodiment of the present invention;
Of the 1st relay gear in FIG.

FIG. 11 is a plan view showing the tape winding operation.

FIG. 12 is a plan view showing the tape winding operation.

FIG. 13 is a plan view showing the tape winding operation.

FIG. 14 is a plan view showing the operation when the tape winding operation is erroneous.

FIG. 15 is a plan view showing an operation when the tape winding operation is erroneous.

FIG. 16 is a view showing the operation of the idler arm as viewed from the direction indicated by an arrow V in FIG. 4;

FIG. 17 is a view taken in the direction of the arrow V in FIG. 4, showing the operation of the idler arm.

FIG. 18 is a developed sectional view of the idler arm.

FIG. 19 is a plan view showing a tape traveling path and a reel moving path of a conventional tape device.

FIG. 20 is a plan view showing an emergency tape winding configuration of a conventional tape device.

[Explanation of symbols]

 Reference Signs List 1 chassis 2 supply side reel motor 7 first relay gear 9 input gear 13 emergency relay gear 14 main rod 16 sub rod 18 idler arm 19 idler center gear 23 idler pulley 25 tension post 26 cam gear 28 drive rod 29 sector arm 31 sector spring 32 Tension arm

Claims (1)

[Claims] 1. A tape device for selectively using a plurality of tape cassettes having different reel positions, comprising: a chassis; a reel reciprocally movable on the chassis to a position corresponding to the plurality of cassettes; Reel movement means for reciprocating between a retracted position which does not hinder the movement of the reel and a plurality of operating positions for driving the reel by engaging with the reel taking a position corresponding to the plurality of cassettes. A tape device characterized by the above-mentioned.