JPS6360854A - Taking-up device - Google Patents

Abstract

PURPOSE:To improve durability and reliability by installing two pairs of taking-up units and an input member which is used in common and cooperates with the taking-up units and permitting a tape material wound onto the output member of each unit to be taken up in the normal and reverse directions free from time loss. CONSTITUTION:Two gears 5 and 6 having different diameters are installed on the inner edge side of an input shaft 3 which can remove freely and has a pulley 2 at the outer edge, and taking-up units A and B are arranged on the right and left sides of the input shaft 3. In each taking-up unit A, B, a clutch spring 12 is wound onto the bosses 10 and 11 which are projectingly installed oppositely at the center parts of the third gear 8 and an output gear 9 which are fitted onto an intermediate shaft 7, and a ratchet member 13 is fitted so as to surround the clutch spring 12. The fourth gear 14 meshed with the gear 6 is fitted onto the outer periphery of the boss 11, and the second clutch spring 17 is wound between the ratchet member 13. An output member 21 having a clutch 21a engaged with a tape reel is fitted onto an fixed output shaft 19, and the revolution of the gear 9 can be transmitted.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to magnetic tape, recording paper, printing paper, packaging paper,
This invention relates to a device for winding up long tape-like objects such as rolled materials and wires.

<Prior art> For example, in VTRs, tape recorders, etc., a planetary gear or a pinion gear is pressed against a gear fixed to a member connected to one of two reels depending on the direction in which the deso is wound. , one reel is driven in the winding direction, and the other reel is driven]? By applying vibration force, the tape is loosened and wound up. however,
=$” The engagement of Ii7 is not necessarily carried out smoothly,
There is a time loss associated with avoiding moving the tape, and not only is it an office job to quickly reverse drive the tape to the desired position, but there are also cases where the tape may become loose or excessive tension may be applied to the tape. there were. Also, a structure using rubber rollers is known, but it is not possible to avoid the time loss mentioned above, and there are disadvantages such as the mechanism becomes complicated and the number of parts increases.

<Problems to be Solved by the Invention> In view of these shortcomings of the prior art, the main object of the present invention is to provide a device for winding a long member that can perform forward and reverse rotations without substantial time loss. Action 1! According to the present invention, it is an object of the present invention to provide a winding device for a long eel member. unit and a common input member cooperating with the winding unit, the input member having a first gear and a second gear coaxially and integrally therebetween, the winding unit and a common input member cooperating with the winding unit; ] -Ninira~ are respectively meshed with the first gear;
an output member coaxially connected to the third gear via a first gangway spring; a release part that engages the first clutch spring and is normally driven by the third gear; a fourth gear meshing with the second gear and connected to the release member via a second clutch spring;
and a gear A, which winds the loop-shaped object wound around the output horn members of the winding units 1 to 1 of both sets in forward and reverse directions depending on the driving direction of the input member. This is achieved by providing the length of the outfit [B] for the purpose.

In particular, loading arms such as VTRs, etc.
- When it is necessary to pull out the tube, the protruding horn member
a first part directly connected to the third gear via the first clutch spring; and a third part connected to the first part via a third clutch spring, which directly connects the tape personal object It is preferable to have a fourth clutch spring connecting the second part to be wound up, a fourth clutch spring connecting the two parts, and a control member for releasing the third clutch spring.

<Operation> In this way, for example, the third gear on the side of the first winding unit is driven in a direction to engage the first clutch spring, and the tape etc. connected to the output section H is driven. It is possible to wind up the driven object. In this case, the third gear on the second winding unit side will be driven to rotate in the direction that releases the first clutch spring, and the tape, etc. will be wound up without being subjected to excessive tension. It happens. Moreover, since the second gear is connected to the release member via the fourth gear and the second clap spring, the winding diameter of the winding unit 1 on the winding side becomes smaller, and Accordingly, even if the corresponding output member rotates at high speed, the input member will not be reversely driven.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show an embodiment of a winding device according to the present invention. An input shaft 3 is rotatably supported by a bearing 4 made of synthetic resin screwed onto a frame 1 made of a metal plate, and a pulley 2 is provided at the outer end of this rotating shaft. A small-diameter first gear 5 and a relatively large-diameter second gear 6 are each integrally attached to the inner end of the rotating shaft 3 by pins. Two sets of winding units 1 to A and B are constructed on the left and right sides of this input shaft 3, but since each has a substantially symmetrical structure, only one winding unit A will be explained below. do.

An intermediate shaft 7 is fixed to the frame 1 on the side of the human power shaft 3 so as to be parallel to the input shaft 3. A third gear 8 and an output gear 9 are rotatably fitted to the intermediate shaft 7, and annular bosses 10111 protruding from the centers of these two gears are concentric with each other. They form a diameter and abut each other. A first clutch spring 12 is wound around both bosses 1o and 11. Furthermore, a ratchet member 13 is rotatably fitted around the outer periphery of the boss 10 so as to surround the clutch spring 12, and one end 12a of the clutch spring 12 is engaged with the ratchet member 13. Ratchet member 13
Lovette teeth 13a are carved on the outer periphery of the ring. Further, a fourth gear 14 is rotatably fitted on the outer periphery of the boss 11, and the fourth gear 14 and the boss-shaped portions 15, 16 of the ratchet member 13 are concentric with each other and have the same diameter, so that they are in contact with each other. I'm right. A second clutch spring 17 is wound around both boss-shaped portions 15,16. The third gear 8 meshes with the first gear 5, and the fourth gear 14 meshes with the second gear 6.

Further, on the side of the intermediate shaft 7, a fixed output shaft 19 is erected on the frame 1 in parallel with the intermediate shaft 7. An output member 21 having a claw 21a that engages with a tape reel is rotatably fitted onto the fixed output shaft 19. Furthermore,
On the outer periphery of the output member 21, there is also a second plate made of synthetic resin.
An output gear 20 is rotatably fitted in the second output gear 20.
The output gear 20 meshes with the first output gear 9 described above. In addition, for the purpose of making it easier to insert the tape reel,
A coil spring 22 is interposed between the output member 21 and the second output gear 20. Furthermore, the leaf spring 1B is in contact with the outer circumferential surface 20a of the second output gear 20 with a predetermined pressing force.

Incidentally, reference numeral 23 denotes a band brake for applying a required braking force to the second output gear 20 on the winding unit B side.

Next, the operation of the above embodiment will be explained.

The pulley 2 is rotationally driven, for example, in the direction indicated by a solid arrow P in FIG. 1 by a motor (not shown) or the like. Then, since the first gear 5 and the third gear 8 are in mesh with each other, the third gear 8 and the boss 10 are rotated counterclockwise in FIG. 1. As a result, a frictional force is applied to the clutch spring 12 in the direction of tightening it, and the rotational force of the third gear 8 is transmitted to the output member 21 via the first output gear 9 and the second output gear 20. 2
1 rotates clockwise, for example, to wind up the tape on the winding unit A side.

At this time, the rotational force of the second gear 6 is transmitted to the fourth gear A714 at a speed ratio higher than that described above, but the fourth gear! l? 14 exerts a frictional force in the direction of winding and unwinding the second clutch spring 17, and the fourth gear 14 only rotates freely and does not interfere with the movement of the output gear 9.20. do not have.

If it is desired to quickly stop this winding device, it is sufficient to engage a locking pawl (not shown) with the lovette tooth 13a. That is, since the engagement of the clutch spring 12 is released and the frictional braking force by the leaf spring 18 is applied to the second output gear 20, the output member 21 immediately stops.

Next, a case will be described in which the pulley 2 is rotated in the opposite direction and the tape is wound onto the winding unit B side.

In this case, it is necessary to unwind the tape from the side toward the take-up unit without exerting excessive resistance.

That is, the pulley 2 is driven to rotate counterclockwise as indicated by the broken line arrow Q in FIG.
is rotated at a lower speed than the third gear 8 depending on the winding diameter of the tape, the first clutch spring 1
A frictional force is applied to the gear 2 in the winding/unwinding direction, allowing the third gear 8 to rotate freely, and the first output gear 9
does not interfere with the movement of

When the first output gear 9 that is interlocked with the tape being fed out is driven at a higher rotational speed than the third gear 8 depending on the winding diameter of the tape, the first clutch spring 12
A frictional force is exerted in the direction of tightening the third gear 8, and the movement of the third gear 8 may interfere with the movement of the first output gear 9, that is, the output member 21. , since the fourth gear r14 is rotationally driven by the second gear t6, the second clutch spring 1
Since a frictional force is exerted on the member 7 to tighten it, the member 13 is rotationally driven. 3. This rotational driving force exerts a force in the direction of winding and loosening the clutch spring 12. Therefore, the first
When the output gear A9 is rotated at a higher speed than the second gear 8, the reflatch spring 12 is forcibly released by the action of the ratchet member 13, and the third gear A9 is also rotated at a higher speed than the second gear A9. can rotate freely.

In VTRs, etc., the tape is pulled toward the head by a loading arm during recording and playback, but in order to perform suitable editing, the tape is moved toward the winding side in the forward direction, for example. It is necessary to pull the tape toward the head in one direction while applying a braking force to the winding side. There is no problem if the material of the tape can withstand considerable tension = 1:), but if the tape is too thin to withstand such tension, special measures are required. . At this time, a force is applied to the output member 21 in the direction of feeding out the tape, but this is because the force acts on the output member 21 in the direction of tightening the clutch spring 12. Figures 3 and 4 show examples that solve such problems.
A detailed explanation of the wrinkles will be omitted.

In the case of this embodiment, the part corresponding to the second output gear 20 directly meshes with the first part 24 and the protruding horn part 21 via the coil spring 22. and a second portion 25 connected to. Both of these parts have boss portions 26 and 27 that abut against each other and are concentric and have the same diameter, and a third clutch spring 2B is wound around the outer periphery of both of these boss portions. One end of the clutch spring 28 is engaged with a first control gear 29 that is rotatably fitted to both parts so as to surround the clutch spring 28.

Further, on the side of the fixed output shaft 19, a control @ 30 is provided upright on the frame 1 so as to be parallel to the fixed output shaft 19. A second control gear 1 - 31 is rotatably fitted on the outer periphery of the control shaft 30 , and an annular boss 32 surrounds the control shaft 30 at the center of the second control gear 1 - 31 . A coil spring 33 is loosely wound around the outer periphery of this boss 32, and one end 33a of the coil spring 33 is connected to a boss 35 surrounding this coil spring 32 (which engages with the boss 35). Further, the other end 33b of the coil spring 33 is engaged with a third control gear 34 rotatably fitted to the control shaft 30.

The operation of this embodiment is similar to that of the previous embodiment, but if you want to pull out the razo with a loading arm (not shown) before winding the tape in the forward direction,
The control gear 34 rotates in conjunction with a loading arm (not shown), and rotationally drives the second control gear 31 via the rotation spring 33. Furthermore, the first control gear 34 drives the clutch spring 28 in the direction of winding and unwinding, and the output member 21 rotates almost freely. Therefore, even when the output member 21 of the winding unit Δ is fixed, it is possible to pull out the tape from the output member 21 of the winding units 1 to B.

Furthermore, when the loading arm returns to the non-operating position,]
When the coil spring 33 idles in the loosening direction and the winding operation is performed by the winding V: c position, the rotational force is transmitted to the third control gear 34 and the loading arm (not shown) moves in the loading direction. In order to avoid being driven, the coil spring 33 has a gap with respect to the boss 32, so that even if the boss 32 is rotated in the loading direction, it cannot rotate the third control gear. do not have. Conversely, when the third control gear A734 is rotationally driven in the loading direction, the friction J between the boss 33 and the plate spring 36 causes the boss 35 to
3a is engaged, the coil spring 33 is wound around the boss 32 and the second control gear 31 can be rotationally driven.

<Effects of the Invention> As described above, according to the present invention, a tape, etc. can be driven in forward and reverse rotation with a relatively compact structure without any time loss, and there is no need to move a special power transmission member. Therefore, high durability and reliability can be ensured, and great effects can be achieved as various magnetic tape winding devices.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a winding device according to the present invention. FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1. FIG. 3 is a plan view showing a second embodiment of the winding device according to the present invention. FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3. 1...Frame 2...Pulley 3...Input shaft 4...Bearing 5.6...Gear 7
...Intermediate shaft 8.9...Gear 10.11...
・Boss 12...Clutch spring 12a...-@ 13...Radiet member 1
3a...Ratchet tooth 14...Gear 15.16...
・Boss-shaped part 17...Clutch spring 18...Leaf spring 19...Fixing nozzle J-shaft 20
...Gear 20a...Outer peripheral surface 21...Output member 21a...Claw 22...Coil spring
23...Brake 24.25...Part 26.2
7...Boss 28...Clutch spring

Claims (2)

[Claims] (1) It has two sets of winding units and a common input member that cooperates with the winding units, and the input member has a first gear and a second gear coaxially and integrally with each other. and a third gear in which the winding unit meshes with the first gear, an output member coaxially connected to the third gear via a first clutch spring, and the first gear. a release member that engages the clutch spring and is normally driven by the third gear; and a fourth gear that engages the second gear and is connected to the release member via the second clutch spring. A device for winding up the tape-shaped object wound around the output members of both sets of winding units in forward and reverse directions depending on the driving direction of the input member. (2) The output member is connected to a first portion directly connected to the third gear via the first clutch spring, and connected to the first portion via a third clutch spring. and a second part that directly winds the tape-like object, a fourth clutch spring that connects the two parts, and a control member that releases the third clutch spring. A winding device according to claim 1.