JP2011190010A - Feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeding device in a simple construction which attains stable feed speed, and prevents meandering of a feed medium. <P>SOLUTION: The feeder 1 includes a pair of rollers and a guide member 13. At least one of the pair of rollers has a tapered shape. At least one of the pair of rollers is energized toward the other roller. Further, when the pair of rollers hold therebetween a seal mount 106, the separation distance between the outer peripheral surfaces of the two rollers becomes constant in the axial direction of the rollers. The pair of rollers are formed so that friction occurs between the outer peripheral surfaces of the individual rollers and the seal pasteboard 106. When the seal pasteboard 106 held between the pair of rollers is fed while being moved in a width direction, with respect to the pair of rollers, a guide member 13 is disposed on the side to which the seal pasteboard 106 is moved, and an end portion of the seal pasteboard 106 is brought into contact therewith. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a feeding device, and more particularly to a feeding device that feeds a thin body.

  When a thin body is fed by a roller, such as a paper feed of a printer or a tape feed of a cassette tape, there arises a problem that the thin body snakes. In order to prevent the meandering of the thin body, a mechanism is used in which guides are arranged in accordance with the width of the thin body before and after the roller. However, in such a mechanism, the difference in the width of the thin body cannot be accommodated unless the position of the guide is adjusted according to the width of the thin body.

  In order to solve such a problem, a mechanism has been proposed in which the roller is formed in a crown shape and the thin body is moved to the center of the roller. Further, there has been proposed a mechanism (for example, Patent Document 1) in which a roller is formed in a tapered shape, a thin body is brought closer to a roller having a larger outer diameter, and a guide is provided at an end portion having a larger roller outer diameter. The technique described in Patent Document 1 is based on the principle that, as shown in Non-Patent Document 1, a difference occurs in the stress distribution of the thin body depending on the roller shape, and the thin body is directed toward the thicker roller outer diameter. (See FIG. 11).

  On the other hand, Patent Document 2 discloses a technique in which a roller pair including a tapered roller having a flange at one end and a linear roller is provided before and after a main roller that feeds paper. By reversing the taper shape in front of and behind the main roller, the recording medium approaches one end of the taper roller before and after the main roller. Therefore, the recording medium can be prevented from meandering.

  On the other hand, Patent Document 3 discloses a technique in which a pair of flat rollers and a pair of rollers each composed of a flat roller and a tapered roller are alternately provided on a pair of roller shafts.

JP 2000-57660 A Japanese Utility Model Publication No.59-68744 JP-A-61-18652

Osamu Nonaka, Shigeo Kayaba, Yoshio Hayashi, "Aerospace Technology Laboratory Materials TM-724 Moving Belt Type Ground Effect Test Device", Aerospace Technology Laboratory, February 1998, p14-15

  However, since the technique described in Patent Document 1 is based on the stress distribution of a thin body, sufficient tension before and after the roller and a sufficient winding angle of the thin body with respect to the roller (in Patent Document 1, 20 ° to 90 °). For this reason, when the mechanism described in Patent Document 1 is used, there are limitations on the configuration of the entire mechanism and the handling of the thin body.

  Further, since the technique described in Patent Document 2 expects only movement in the width direction by a tapered roller (driven roller), the linear roller (driving roller) paired with the tapered roller does not have friction. . Therefore, it is necessary to separately arrange a main roller for feeding, and the entire apparatus becomes complicated.

  Furthermore, in the technique described in Patent Document 3, the outer peripheral surface of the flat roller is pressed against the roller end on the large-diameter side of the tapered roller. Therefore, the roller end of the taper roller may be crushed and the feeding speed may change.

  The present invention has been made in order to solve such a problem, and has a simple configuration that realizes a stable feeding speed and prevents meandering of a feeding medium. It is intended to provide.

  In the feeding device according to the present invention, at least one roller has a tapered shape, both rollers are arranged to face each other, are rotatable in the circumferential direction, and at least one roller is driven to rotate. When the feeding medium sandwiched between the pair of rollers is fed while moving in the width direction, the feeding medium is arranged on the side where the feeding medium moves with respect to the pair of rollers, and the feeding medium A guide member that abuts the end of the pair of rollers, and one of the pair of rollers is urged toward the other roller, and when the pair of rollers sandwich the feeding medium, The separation distance between the outer peripheral surfaces of both rollers is constant in the roller axial direction, and the pair of rollers are formed so that friction occurs between the outer peripheral surface of each roller and the feeding medium. .

  According to the present invention, it is possible to provide a feeding device that has a simple configuration, realizes a stable feeding speed, and prevents meandering of a feeding medium.

It is a figure which shows the structural example of the seal peeling machine concerning Embodiment 1. FIG. FIG. 2 is a diagram illustrating a configuration example of a feeding device according to a first embodiment. FIG. 2 is a diagram illustrating a configuration example of a feeding device according to a first embodiment. FIG. 3 is a diagram illustrating a rotation direction of a roller according to the first embodiment. FIG. 6 is a diagram for explaining a force applied to a sticker mount according to the first exemplary embodiment. It is a figure which shows the modification of the seal peeling machine concerning Embodiment 1. FIG. It is a figure which shows the structural example of the feeder concerning Embodiment 2. FIG. FIG. 10 is a diagram illustrating a modification of the feeding device according to the second embodiment. It is a figure for demonstrating the modification of a taper roller. It is a figure for demonstrating the modification of a taper roller. It is a figure which shows the stress distribution of a related belt.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. First, an application example of the feeding device according to the present invention will be described. FIG. 1 is a diagram illustrating a configuration example of a seal peeling machine 101 equipped with a feeding device 1 according to the present embodiment. The seal peeling machine 101 includes a main body 102 and a reel-like seal mount 103 set on the main body 102. A plurality of stickers 104 are attached to the surface of the reel-like sticker mount 103.

  The main body 102 includes a feeding device 1 according to the present invention and a peeling shaft 105. The feeding device 1 feeds the sticker mount 106 in the arrow direction. Then, the sticker mount 106 is pulled out from the reel-like sticker mount 103 and folded back by the peeling shaft 105. As a result, the sticker 104 attached to the sticker mount 106 is peeled off.

  Next, a specific configuration example of the feeding device 1 according to the present embodiment will be described. FIG. 2 is a diagram illustrating a configuration example of the feeding device 1. The feeding device 1 includes a taper roller 11, a flat roller 12, and a guide member 13.

  The taper roller 11 has a tapered rubber roller 111 and a rotation shaft 112 that passes through the central axis of the taper roller 11. The flat roller 12 has a linear rubber roller 121 and a rotation shaft 122 that passes through the central axis of the flat roller 12. The outer peripheral surfaces of the taper roller 11 and the flat roller 12 are made of rubber. Therefore, a frictional force is generated on the contact surface between the outer peripheral surfaces of both rollers and the seal mount 106 serving as a feeding medium. As a method of forming the taper of the rubber roller 111, the rubber roller 111 may be integrally formed from the beginning in a tapered shape, or a part of the rotating shaft 112 is formed in a tapered shape, and a flat rubber roller is wound around it. Also good. The central axis of the roller means the central axis of the rubber rollers 111 and 121 themselves. The central axis of the roller is indicated by a dashed line in FIG.

  The separation distance between the outer peripheral surface of the taper roller 11 and the outer peripheral surface of the flat roller 12 is disposed so as to be constant in the roller axial direction when the seal mount 106 is sandwiched. More specifically, the central axis of the taper roller 11 and the central axis of the flat roller 12 are arranged on the same plane. And on the said plane, the separation distance of the outer peripheral surface of the taper roller 11 and the outer peripheral surface of the flat roller 12 is constant in the roller axial direction. In order to make the separation distance constant, for example, as shown in FIG. 3, the angle formed by the rotation shaft 112 of the taper roller 11 and the rotation shaft 122 of the flat roller 12 is fixed to be equal to the taper angle θ. That's fine.

  At this time, the flat roller 12 is urged toward the taper roller 11. For example, a biasing member such as a spring is used as the biasing means. As shown in FIG. 3, the spring 14 is connected to the rotating shaft 122 of the flat roller 12, and the spring 14 biases the flat roller 12 toward the taper roller 11. As a result, the taper roller 11 and the flat roller 12 sandwich the seal mount 106.

  The taper roller 11 is a drive roller that is driven to rotate by driving a motor (not shown) connected to the rotary shaft 112. The sticker mount 106 is fed by the rotational drive of the taper roller 11. On the other hand, the flat roller 12 is a driven roller that rotates when the seal mount 106 in contact with the flat roller 12 is fed.

  The guide member 13 is provided at the end portion on the large diameter side of the taper roller 11. When the seal mount 106 is fed, the seal mount 106 is brought close to the end of the taper roller 11 on the large diameter side. Therefore, the guide member 13 comes into contact with the end portion in the width direction of the seal mount 106 that has been brought close. In FIG. 2, the guide member 13 is a flange provided at the end of the tapered roller 11 on the large diameter side, but is not limited thereto. The guide member 13 may be provided on the flat roller 12 side. Further, a guide member 13 for contacting the seal mount 106 before and after the pair of rollers in the feeding direction of the seal mount 106 may be provided.

  Subsequently, an operation example of the feeding device 1 according to the present embodiment will be described. First, the principle of feeding the sticker mount 106 will be described. FIG. 4 is a diagram illustrating the rotation directions of the taper roller 11 and the flat roller 12. When the taper roller 11 is rotationally driven in the arrow 202 direction, the flat roller 12 biased toward the taper roller 11 rotates (follows) in the arrow 201 direction. Then, the sticker mount 106 held between the taper roller 11 and the flat roller 12 advances in the front direction 203 on the paper surface. That is, the seal mount 106 is fed by a frictional force generated between the taper roller 11 and the flat roller 12 and the seal mount 106. Specifically, the seal mount 106 is fed by the rolling friction force received from the taper roller 11 and the flat roller 12. Here, the rolling frictional force FR is generally expressed by the following equation (1), where R is the roller radius, 1 is the contact width between the roller and the seal, W is the contact load of the roller, and α is the elastic hysteresis loss coefficient of the roller. Is calculated by

    FR = αWl / 3πR (1)

  That is, in order to eliminate slippage due to the rolling frictional force FR of the roller and efficiently feed the seal mount 106, the roller radius R is reduced, the roller material is soft (α is increased), and the seal mount is biased to the roller. What is necessary is just to enlarge the force W to do.

  Next, the principle that the seal mount 106 is brought close to the end of the taper roller 11 on the large diameter side will be described. FIG. 5 shows a view of FIG. 4 as viewed from above. At this time, the central axis of the taper roller 11 is parallel to the paper surface, but the seal mount 106 and the flat roller 12 are inclined with respect to the paper surface. Since the taper roller 11 is hidden under the seal mount 106, it is indicated by a broken line. As shown in FIG. 5, the speed direction of the seal mount 106 on the contact surface between the taper roller 11 and the seal mount 106 is indicated by an arrow 204. On the other hand, the speed direction of the seal mount on the contact surface between the flat roller 12 and the seal mount 106 is an arrow 205. That is, speeds are generated in different directions on both sides of the sticker mount 106. This is because an angular difference is provided between the rotating shaft of the taper roller 11 and the rotating shaft of the flat roller 12.

  As described above, since speeds are generated in different directions on both surfaces of the sticker mount 106, a sliding frictional force is generated on the sticker mount 106 in a direction in which these arrows 204 and 205 are added (arrow 206). When the sliding frictional force is decomposed into the traveling direction component and the width direction component of the seal mount 106, the frictional force acting in the traveling direction is an arrow 207, and the frictional force acting in the width direction is an arrow 208. Due to the frictional force in the width direction (arrow 208) received from the flat roller 12, the seal mount 106 is brought close to the guide member 13 (not shown) disposed at the end on the large diameter side of the taper roller 11.

  Here, when the taper angle of the taper roller 11 is θ, the sliding friction coefficient between the flat roller 12 and the seal mount 106 is μ, and the contact load of the roller is W, the sliding friction force FS is expressed by the following equation (2). Calculated.

    FS = μW sin θ (2)

  That is, in order to move the seal mount 106 in the width direction, the taper angle θ is increased and the force W for urging the seal mount 106 to the roller is increased. In the configuration example shown in FIG. 3, in order to obtain sufficient rolling friction force FR and sliding friction force FS, a roller diameter of 10 mm, a taper angle of 1 °, a rubber roller hardness Shore A30, and a tension spring strength of 5N are desirable.

  As described above, according to the configuration of the feeding device 1 according to the present embodiment, each of the pair of rollers is formed so that friction is generated between the rollers and the seal mount 106. Therefore, the seal mount 106 can be fed by the rolling frictional force FR provided by the pair of rollers without providing a separate feeding roller. That is, the sticker mount 106 can be fed only by the feeding device 1 having a simple configuration.

  In addition, since at least one of the pair of rollers in the feeding device 1 has a tapered shape, an angular difference occurs between the central axes of the rollers. Therefore, the directions of the rolling frictional forces FR1 and FR2 of the respective rollers are different. As a result, a sliding frictional force FS including a force in the width direction component is generated on the seal mount 106. Due to the force in the width direction, the seal mount 106 is fed while always contacting the guide member 13 provided on the taper roller 11. Therefore, the seal mount 106 can be prevented from meandering. In addition, since only one side of the sticker mount 106 is regulated by the guide member 13, there is no limit in the width direction of the sticker mount 106 as long as the roller size permits.

  Further, in the feeding device 1, the separation distance between the taper roller 11 and the flat roller 12 is constant. Therefore, no force is applied only to the end of the taper roller 11 on the large diameter side. As a result, a change in the feeding speed due to the crushing of the tip of the taper roller 11 does not occur. Therefore, the sticker mount 106 can be fed at a stable feeding speed.

  In addition, it is good also as a structure as shown in FIG. 6 instead of the structure of the seal peeling machine shown in FIG. The seal peeling machine shown in FIG. 6 further includes a take-up reel 107 that winds the seal mount 106 sent out from the feeding device 1. Thereby, the collection process of the sticker mount 106 after the sticker 104 is peeled does not become complicated.

Embodiment 2
A second embodiment according to the present invention will be described. FIG. 7 shows a configuration example of the feeding device 2 according to the present embodiment. In the feeding device 2, the flat roller 12 has a hollow cylindrical shape, and the inner diameter is larger than the outer diameter of the rotating shaft 122. Since other configurations are the same as those of the feeding device 1, description thereof is omitted.

  Since the inner diameter of the flat roller 12 is larger than the outer diameter of the rotating shaft 122, the central axis (the dashed line in FIG. 7) of the flat roller 12 is not limited in the radial direction of the rotating shaft 122. That is, the central axis of the flat roller 12 can be tilted. Therefore, even when the taper angle of the taper roller 11 is changed, the separation distance between the outer peripheral surface of the flat roller 12 and the outer peripheral surface of the taper roller 11 is always constant in the roller axial direction. That is, when the seal mount 106 is sandwiched by a pair of rollers, the outer peripheral surface of the taper roller 11 and the outer peripheral surface of the flat roller 12 and the seal mount 106 are always in contact with each other without a gap. Accordingly, the rolling friction force FR and the sliding friction force FS are generated in the entire width direction of the seal mount 106 on the contact surface between the taper roller 11 and the flat roller 12 and the seal mount 106. As a result, a stable feeding operation can be realized. In addition, as shown in FIG. 8, the same effect can be acquired even if it is the structure reversed left and right. In this embodiment, when the pair of rollers does not sandwich the seal mount 106, the distance between the outer peripheral surface of the flat roller 12 and the outer peripheral surface of the taper roller 11 is not necessarily constant in the roller axial direction. Absent.

  Next, a modification according to this embodiment will be described. As shown in FIG. 9, the tapered roller 11 may include a tapered member 113 and a fastener 114 in addition to the rubber roller 111, the rotating shaft 112, and the guide member 13.

  The tapered member 113 can be stroked in the axial direction of the rotating shaft 112. That is, as indicated by a broken line, the inside of the rubber roller 111 is hollow. Therefore, as shown in FIG. 10, the taper angle of the rubber roller 111 can be increased or decreased by pushing the tapered member 113 into the rubber roller 111 to an arbitrary position. At this time, the end portion on the small diameter side of the rubber roller 111 is fixed to the rotating shaft 112. Further, the fastener 114 can fix the position of the end portion on the large diameter side of the tapered member 113 with respect to the rotating shaft 112. Therefore, the positional relationship between the rubber roller 111 and the tapered member 113 inserted into the rubber roller 111 can be fixed. That is, the taper angle can be fixed to an arbitrary angle.

  Thus, according to the configuration of the modified example of the present embodiment, the taper angle of the taper roller 11 can be adjusted to an arbitrary angle. Therefore, the sliding frictional force FS received by the sticker mount 106 can be adjusted (see formula (2)). As a result, the magnitude of the force for bringing the seal mount 106 into contact with the guide member 13 can be adjusted according to the material of the seal mount 106 and the return speed required from the meandering state required for the feeding device 2. Of course, in the present embodiment, since the central axis of the flat roller 12 is tiltable, the taper roller 11 and the flat roller 12 are in contact with the seal mount 106 without a gap. That is, even when the taper angle changes, a stable feeding operation can be realized.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed and combined without departing from the spirit of the present invention. For example, in the above embodiment, the taper roller 11 is a drive roller and the flat roller 12 is a driven roller. However, the reverse may be used, or both may be driven. Further, even if both rollers are tapered rollers and are arranged so that the directions of the end portions on the large diameter side match, the same effect can be obtained.

  In the above embodiment, the rubber rollers 111 and 121 are used to obtain a sufficient frictional force, but the present invention is not limited to this. For example, even when a roller made of another material is used, sufficient frictional force may be secured by subjecting the roller surface to sandblasting, winding sandpaper, or knurling.

  Further, although the tension spring is used as a means for urging the pair of rollers in the mutual direction, the rotating shaft 122 of the flat roller 12 may be pressed from above with a torsion spring, a leaf spring, or the like. The mass may be pressed as a sufficiently large one. With respect to the means for allowing the flat roller 12 to tilt freely, the inner diameter of the rubber roller 121 and the diameter of the rotating shaft 122 may be substantially the same, and the rotating shaft 122 may be formed of an elastic material. Thereby, the rotation shaft 122 is bent by the mass of the rubber roller 121, and the central axis of the flat roller 12 is tilted.

  Furthermore, in the above embodiment, the seal peeling machine is assumed, but the present invention is not limited to this. For example, the present invention can also be applied to feeding thin sheets such as plain paper, tape, and belt. The feeding apparatus according to the present invention can be applied to a thin body supply method even for a strip shape, a long roll shape, a reel-to-reel format, and the like.

DESCRIPTION OF SYMBOLS 1, 2 Feed device 11 Taper roller 12 Flat roller 13 Guide member 14 Spring 101 Seal peeling machine 102 Main body 103 Reel-like seal mount 104 Seal 105 Release shaft 106 Seal mount 107 Take-up reel 111, 121 Rubber roller 112, 122 Rotating shaft 113 Taper Shape member 114 Fastener

Claims (6)

At least one roller has a tapered shape, both rollers are arranged to face each other and are rotatable in the circumferential direction; and at least one roller is driven to rotate;
When the feeding medium sandwiched between the pair of rollers is fed while moving in the width direction, the feeding medium is arranged on the side where the feeding medium moves with respect to the pair of rollers, and the feeding medium A guide member with which the end abuts,
With
Of the pair of rollers, one roller is biased toward the other roller, and when the pair of rollers sandwich the feeding medium, the distance between the outer peripheral surfaces of the two rollers is the roller axial direction. And the pair of rollers is formed so that friction is generated between the outer peripheral surface of each roller and the feeding medium.   The feeding device according to claim 1, wherein one of the pair of rollers is provided such that a central axis of the one roller is tiltable with respect to a central axis of the other roller.   The feeding device according to claim 1 or 2, wherein a taper angle of the pair of rollers can arbitrarily adjust a taper angle.   The feeding device according to any one of claims 1 to 3, wherein the pair of rollers is a roller having at least a surface layer formed of a rubber layer.   The feeding device according to any one of claims 1 to 4, wherein the guide member is a flange provided at a large-diameter roller end portion of the tapered roller among the pair of rollers.   The biasing member which is provided in the rotating shaft of at least one roller among the pair of rollers, and biases the rotating shaft of the one roller toward the rotating shaft of the other roller. The feeding device according to any one of the above.

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