JP2002205867A - Roller support structure for spreader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure capable of keeping tension constant by sliding a delivering roller relatively to a rotary shaft even when the tape winding diameters of the delivering roller and a winding roller are changed. SOLUTION: This spreader 10 is provided with the delivering roller 12 arranged in a case 11, the rotary shaft 16 provided rotatably together with the delivering roller 12, and the winding roller 13 winding a spread tape T in sequence. A contact pressure adjusting means 17 is provided on the outer peripheral side of the rotary shaft 16. The contact pressure adjusting means 17 is provided with a curved face member 34 to be kept in contact with the inner peripheral face of the delivering roller 12, and the curved face member 34 is cantilever-supported at interval positions of 120 deg. along the peripheral direction of the rotary shaft 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller support structure for a transfer device, and more particularly, to a smooth rotation following a change in the tape diameter of each of a pay-out roller and a take-up roller. The present invention relates to a roller support structure in a transfer device as described above.

[0002]

2. Description of the Related Art In recent years, transposers capable of concealing characters, symbols, and the like for correction have been widely used. The transfer device includes a case, a dispensing roller disposed around the case, and a tape provided with a transfer agent such as a white film that can be peeled off on one side, and a dispensing roller including the dispensing roller inside the case. A rotary shaft rotatably supported by the head, a head for transferring the transfer agent to the portion to be corrected, and a winding roller for sequentially winding the tape after the transfer has been performed at the tip of the head. It is configured. An interlocking mechanism such as a gear is provided between the feeding roller and the take-up roller. When a tape pull-out force is applied to the feeding roller, the take-up roller rotates at the same time to transfer the roller. Later tape winding is possible.

[0003]

However, in the transfer device, as the tape consumption increases, the tape winding diameter of the feeding roller becomes relatively smaller than the tape winding diameter of the winding roller. Unnecessary tension is generated in the tape between the winding roller and the tape. Therefore, a transfer device provided with contact pressure adjusting means for causing relative sliding between the rotating shaft and the feeding roller is known as a means for relaxing the unnecessary tension to a constant tension.

As a transfer device employing the contact pressure adjusting means, for example, a configuration shown in FIGS. 6 and 7 is known. The transfer device 50 includes a feed roller 52 formed by winding a tape T including a transfer agent in a case 51, a take-up roller 53 provided at a position adjacent to the feed roller 52, and a case 51. A rotation shaft 56 rotatably mounted around a support member 55 located inside and supporting the feed roller 52, a support member 57 rotatably supporting the take-up roller 53, a feed roller 52 and a take-up roller And a head 58 for reversing the tape T extending between the tape 53 and the transfer agent on a predetermined surface to be adhered.

The rotary shaft 56 is provided with four contact pressure adjusting means 60 on the outer peripheral side thereof in contact with the inner peripheral surface of the feed roller 52, and the four connecting pieces 6 extending in the radial direction.
2 and a gear 63 is provided. The contact pressure adjusting means 60 protrudes from the outer peripheral surface of the rotating shaft 56, and is connected to the flaky connecting portions 64 provided at approximately 90-degree intervals along the circumferential direction, and to each end of the flaky connecting portions 64. It is composed of an arc-shaped piece 65. Also,
The gear 63 is provided so as to mesh with teeth (not shown) provided on the take-up roller 53, whereby the rotating shaft 56
When is rotated, the take-up roller 53 is simultaneously rotatable. In addition, among the four connecting pieces 62, one connecting piece 62 is provided on the inner peripheral side of the gear 63 with the gear 63
Is provided with an arc-shaped inversion prevention piece 67 along the inner periphery of the case 51. The tip of the inversion prevention piece 67 engages with a tooth 68 formed on the inner surface of the case 51 in a counterclockwise direction and is fed out. Only the clockwise rotation of the roller 52 is allowed.

The contact pressure adjusting means 60 of the transfer device 50 includes an arcuate piece 65 which is in contact with the inner peripheral surface 52A of the feeding roller 52.
4, the arc-shaped piece 65
Cannot fully demonstrate its elasticity. That is,
The arc-shaped piece portion 65 is positioned on the inner peripheral surface of
While applying a contact pressure that allows the rotating shaft 56 and the feeding roller 52 to rotate simultaneously, the feeding roller 52 is slid clockwise with respect to the rotating shaft 56 when a predetermined tension or more is applied to the tape T. This makes it difficult to provide a flexible elasticity, which causes an inconvenience that the feeding roller 52 is not smoothly slid and an excessive tension is generated in the tape T. On the other hand, if slipping is performed to reduce the tension to a certain level, the feeding roller 52 may slip with respect to the rotating shaft 56 even when the tension is constant. Roller 53
This causes another inconvenience that the tape T between them is loosened to cause poor transfer.

[0007]

SUMMARY OF THE INVENTION The present invention was devised in view of such inconvenience, and an object of the present invention is to change the tape winding diameter between a feeding roller and a take-up roller to change the tape between them. It is an object of the present invention to provide a roller support structure in a transfer device in which a feeding roller can slide with respect to a rotating shaft in order to reduce the tension to an appropriate constant tension when a predetermined tension or more is generated. . Further, the present invention provides a roller in which the contact pressure between the feeding roller and the rotating shaft side is difficult to be uniform, especially when they are made of resin, so that an appropriate contact pressure can be obtained to complement this. It is to provide a support structure.

[0008]

In order to achieve the above-mentioned object, the present invention provides a case, and a feeding roller which is disposed in the case and is provided with a tape provided with a transfer agent on one surface thereof, A transfer shaft including a rotation shaft rotatably supporting the feeding roller in a case, and a winding roller rotatably provided at the same time as the feeding roller and sequentially winding the transferred tape. A contact pressure adjusting means which is located between the rotating shaft and the rotating shaft and rotates the feeding roller at the same time as the rotating shaft, and which causes relative slip between the feeding roller and the rotating shaft when a constant tension is applied to the tape. Provided, the contact pressure adjusting means is supported at one end at predetermined intervals along the circumferential direction of the rotating shaft,
The configuration is adopted. According to such a configuration, it is possible to secure a large elasticity on the free end side of the contact pressure adjusting means, and the feeding roller rotates simultaneously with the rotating shaft while the tape tension is appropriate, while the tension is reduced. It becomes possible to smoothly carry out the relative sliding of the feeding roller when it exceeds a certain value. The contact pressure adjusting means may be provided integrally with the rotary shaft on the outer peripheral side of the rotary shaft, or may be provided integrally with the feed roller on the inner peripheral side of the feed roller.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, it is preferable to provide a convex contact portion on the free end side of the contact pressure adjusting means.
By providing such a convex contact portion, the contact area between the feeding roller and the rotating shaft is reduced, and it is possible to obtain an appropriate contact pressure in combination with the elasticity of the cantilever structure. In addition, when the tape is applied with a predetermined tension or more, the relative slip is smoothly performed.

[0010] Further, a configuration may be adopted in which a convex contact portion is provided on the free end side of the contact pressure adjusting means, and the convex contact portion extends along the axial direction of the rotating shaft.

Further, the contact pressure adjusting means comprises a plurality of curved surface members extending in a circumferential direction substantially concentric with the rotating shaft, and these curved surface members are provided at 120-degree intervals along the circumferential direction. It is good to take. This allows
The contact pressure adjusting means is provided at three places in the circumferential direction, so that a contact pressure uniformly distributed in the circumferential direction can be obtained, and the rotation operation of the feeding roller when the relative slip occurs can be made smooth.

Incidentally, regarding the tape in this specification,
"Constant tension" is used for a tension suitable for transferring a transfer agent provided on a tape to a transfer surface.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of the transfer device according to the present embodiment, and FIG. 2 is an enlarged plan view of a main part thereof. In these figures, the transfer device 10 is a case 1
And a feeding roller 12 which is disposed in a case 11 and is wound with a tape T provided with a transfer agent on one side.
A take-up roller 13 provided at a position adjacent to the feed roller 12; and a take-up roller 12 rotatably mounted around a support member 15 located in the case 11.
, A contact pressure adjusting means 17 provided between the rotating shaft 16 and the feeding roller 12, and a supporting member 18 for rotatably supporting the winding roller 13.
And a head 19 for reversing the tape T extending between the feeding roller 12 and the take-up roller 13 to transfer a transfer agent to a predetermined adherend surface.

The case 11 is formed by fitting a two-part dish-shaped member to each other so as to close the same. In FIG. 1, the support members 15, 17 and the like are integrally provided on the inner surface side. Are only shown. The dish-shaped member includes a flat portion 11A, a peripheral wall 11B connected to the outer periphery of the flat portion, and rising from the flat portion 11A;
By not providing B partially, the head 19 is constituted by an open portion 11C that allows the tip end side to protrude to the outside.

The feed roller 12 is shown in FIGS.
As shown in FIG. 1, an inner cylinder 21 and an outer cylinder 23 provided with a connecting portion 22 extending radially from the outer periphery of the inner cylinder 21 and having a tape T wound around the outer periphery thereof, And a flange 2 provided on one end side of the outer cylinder 23
4 is provided. The winding roller 13
Similarly, an inner cylinder 26, an outer cylinder 28 provided via a connecting portion 27 extending radially from the outer periphery of the inner cylinder 26,
Flange 2 provided on one end side of inner cylinder 26 and outer cylinder 28
9 is provided.

The rotary shaft 16 is provided on a cylindrical portion 31 having a hole 30 that can be fitted into the support member 15 in the case 11, and provided on the outer peripheral side of the cylindrical portion 31 at an interval of 120 degrees in the circumferential direction. And a rib 33 provided along the axial direction of the cylindrical portion 31 to have a length substantially equal to the length of the cylindrical portion 31. Here, the length connecting the tip of the rib 33 and the center of the cylindrical portion 31 is set to be slightly smaller than the length connecting the center of the inner cylinder 21 of the feeding roller 12 and the inner peripheral surface.

At the lower side of each of the ribs 33 in the figure, a cylindrical portion 3 is provided.
The curved surface members 34 constituting the contact pressure adjusting means 17 extending substantially along the circumferential direction are provided integrally and continuously,
Thus, each curved surface member 34 is supported at one end at intervals of 120 degrees substantially along the circumferential direction. This curved member 34 has a convex contact portion 35 on its outer surface on the free end side to slightly raise the outer surface position of the curved member 34 outward.
It is provided in the shape provided with. The convex contact portion 35 is provided so as to be able to contact the inner peripheral surface of the inner cylinder 21 of the feed roller 12, and the contact pressure, that is, the elasticity of the curved surface member 34 applies a pulling force to the tape T wound around the feed roller 12. When the rotation shaft 1 is rotated,
6 is rotated at the same time, and when a predetermined tension or more is applied to the take-up roller 13, the feeding roller 12 is set to slide with respect to the rotating shaft 16 so as to return to a constant tension.

A gear 41 is provided concentrically on the rotary shaft 16 via three connecting pieces 40 extending radially from the lower end of the rib 33. One connecting piece 40 has a gear 41 An inversion prevention piece 43 is provided at the inner peripheral side and extends along the direction in which the gear 41 extends. The reversing prevention piece 43 meshes with a knurled tooth 44 formed on the flat portion 11A of the case 11 to allow the rotation of the rotating shaft 16 only in the clockwise direction in FIG. Further, the gear 41 can mesh with teeth (not shown) formed on the lower end surface of the winding roller 13 in FIG. 3 so that when the rotating shaft 16 rotates, the winding roller 13 also rotates at the same time. It is possible.

Next, the operation of the transfer device 10 according to the present embodiment will be described.

The tape T wound around the feeding roller 12
The tape T is pulled out from the feeding roller 12 by horizontally moving while pressing the tip of the head 19 against the transfer surface while the lead end is fixed to the take-up roller 13 in a state where the tape T is inverted at the position of the head 19. Then, a predetermined transfer is performed. When the feeding roller 12 rotates, the curved member 34 is in contact with the inner cylinder 21 of the feeding roller 12 at a predetermined contact pressure, and the rotating shaft 16 also rotates simultaneously.
The take-up roller 13 meshing with the gear 41 located on the outer peripheral side thereof also rotates at the same time to sequentially take up the tape T after the transfer is performed.

When the transfer progresses and a relative change occurs in the winding diameter of the tape T, that is, when the tape winding diameter on the winding roller 13 side relatively increases, the feeding roller 12 and the winding roller 13 The tape T in between will gradually increase the tension for an appropriate constant tension. Then, the feeding roller 12 slides relatively to the rotating shaft 16, that is, the curved surface member 34, and maintains a constant tension, whereby the tape T can be smoothly fed and the transfer agent is transferred. It becomes possible to wear.

Therefore, according to this embodiment, since the contact pressure adjusting member 17 is constituted by the curved member 34 supported at one end, the curved member 34 exerts a flexible elasticity, While the simultaneous rotation with the rotating shaft 16 is ensured, there is an effect that the transfer can be performed while maintaining the tension of the tape T constant by exerting relative slip according to the change in the tension.

In the above embodiment, the curved member 34
Is provided in a shape extending in the circumferential direction from the lower side of the rib 33 so as to be in a cantilevered posture, but may extend from the entire length of the rib 33. Further, the curved surface members 34 are provided at three places, but may be increased or decreased as necessary.

In the above embodiment, the contact pressure adjusting means 17 is provided integrally on the rotating shaft 16 side.
Even in a configuration in which the contact pressure adjusting means 17 is provided on the inner peripheral surface of the second embodiment, substantially the same operation and effect as those of the above embodiment can be obtained.

[0026]

As described above, according to the present invention,
Since the contact pressure adjusting means supported at one end at predetermined intervals along the circumferential direction of the rotating shaft is provided between the feeding roller and the rotating shaft, a large elasticity of the contact pressure adjusting means on the free end side is secured. As a result, the feeding roller rotates simultaneously with the rotating shaft while the tape tension is appropriate. On the other hand, it is possible to smoothly slide the feeding roller when the tension becomes equal to or more than a certain value, and it is possible to smoothly transfer the transfer agent.

In addition, according to the configuration in which the convex contact portion is provided on the free end side of the contact pressure adjusting means, the contact area between the feeding roller and the rotating shaft is reduced, and the elasticity due to the cantilever structure is appropriate. It is possible to perform accurate contact pressure adjustment with high accuracy.

Further, the contact pressure adjusting means is constituted by a curved surface member, and the curved surface member is formed along a circumferential direction of the rotating shaft.
In the configuration provided at the 0-degree interval position, the contact pressure adjusting means is provided at three places in the circumferential direction, and it is possible to obtain a contact pressure evenly distributed in the circumferential direction. The rotation operation of the feeding roller can be made smooth.

[Brief description of the drawings]

FIG. 1 is a plan view showing the internal structure of a transfer device.

FIG. 2 is an enlarged plan view of a feeding roller in FIG. 1;

FIG. 3 is an exploded perspective view of FIG. 1;

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG. 2;

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 6 is a plan view showing the internal structure of a conventional transfer device.

FIG. 7 is an enlarged plan view of a feeding roller in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transferring device 11 Case 12 Feeding roller 13 Take-up roller 16 Rotating shaft 17 Contact pressure adjusting means 19 Head T tape

Claims (5)

[Claims] 1. A case, a feed roller disposed in the case and wound with a tape provided with a transfer agent on one side, and a rotating shaft rotatably supporting the feed roller in the case. A winding roller, which is provided rotatably at the same time as the feeding roller and sequentially winds the transferred tape, wherein the winding roller is positioned between the feeding roller and a rotating shaft to rotate the feeding roller. Along with rotating the shaft, contact pressure adjusting means for causing relative slippage between the feeding roller and the rotating shaft when a constant tension is applied to the tape is provided, and the contact pressure adjusting means is arranged in a circumferential direction of the rotating shaft. A roller support structure in the transfer device, which is supported at one end side at predetermined intervals along the roller. 2. A case, a feed roller disposed in the case and wound with a tape provided with a transfer agent on one side, and a rotating shaft rotatably supporting the feed roller in the case. A winding roller, which is provided rotatably at the same time as the feeding roller and sequentially winds the transferred tape, wherein the rotating shaft is in contact with an inner peripheral surface of the feeding roller and the feeding roller And a contact pressure adjusting means for causing relative slippage between the tape and a feeding roller when a constant tension is applied to the tape, wherein the contact pressure adjusting means extends along a circumferential direction of the rotating shaft. A roller support structure in a transfer device, which is supported at one end side at predetermined intervals. 3. A convex contact portion is provided on a free end side of said contact pressure adjusting means.
A roller support structure in the transfer device described in the above. 4. A convex contact portion is provided on a free end side of said contact pressure adjusting means, and said convex contact portion extends along an axial direction of said rotating shaft. 4. A roller support structure in the transfer device according to 3. 5. The contact pressure adjusting means comprises a plurality of curved surface members extending in a circumferential direction substantially concentric with the rotation axis,
The curved surface members are provided at 120-degree intervals along the circumferential direction.
A roller support structure in the transfer device described in the above.