Winding conveying device and winding conveying method

Abstract

To provide a winding conveying device which prevents a workpiece from sliding when changing a direction during conveyance and maintains tension.SOLUTION: A feeding roller 22 of a conveying part 20 has: multiple small rollers 26 that are arranged in a circumferential direction on one surface of a body part; multiple cam rollers 28 that are arranged at positions eccentric to shafts of the small rollers 26 in a circumferential direction on the other surface of the body part; and multiple rotation restricting parts 27. The cam rollers 28 are guided by a cam guide in a non-rotation range, wherein a radial distance from the center of the feeding roller 22 is restricted. The rotation restricting parts 27 each include an eccentric support part that supports the shaft of the cam roller 28, and a connecting part that penetrates the body part and is connected to the shaft of the small roller 26, wherein the self-rotation of the small rollers 26 is restricted via the connecting part by restricting a position of the cam roller 28. In a rotatable range, the small rollers 26 are self-rotatable. In the non-rotation range, a workpiece W is conveyed by being interposed between the small rollers 26 whose self-rotation is restricted, and chain rollers 72.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a winding and conveying device and a winding and conveying method.

Background Art

[0002] Conventionally, a winding and conveying device that winds a long workpiece while applying tension thereto is known. For example, Patent Document 1 discloses a winding device that includes a workpiece feeding device, a tension device, a winding device, etc., and maintains tension by adjusting the feeding speed.

[0003] Also conventionally, a feed roller is provided between the workpiece feeding device and the tension device, and a mechanism is adopted in which a urethane rubber pressing roller presses the workpiece to increase the contact area with the workpiece and facilitate tension holding.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the configuration of Patent Document 1 assuming a coil copper wire, it cannot be directly applied depending on the type of workpiece. For example, a CFRP (carbon fiber reinforced plastic) workpiece contains resin, and the adhesive component adheres to the rotating roller, and the fibers are likely to break when peeled off. Also, the urethane rubber wears and fragments adhere to the surface, which may become foreign matter.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a winding and conveying device and a winding and conveying method that prevent workpiece slippage during direction change during conveyance and maintain a constant tension.

Means for Solving the Problems

[0007] The winding and conveying device (1) of the present invention includes a winding part (10) for winding a workpiece (W), a conveying part (20), a cam guide (76), and a chain device (70).

[0008] The conveying part changes the direction of the workpiece and sends it to the winding part side by a feed roller (22) whose part of the outer circumference in the circumferential direction is defined as a non-rotating range and the range other than the non-rotating range is defined as a rotatable range. The cam guide is provided along the outer circumference of the non-rotating range of the feed roller.

[0009] The chain device drives a double-speed chain (71) to which a plurality of chain rollers (72) contacting the non-rotating range of the feed roller are connected, while pressing it in the radially inner direction by a pressing part (75), along the rotation direction of the feed roller.

[0010] The feed roller has a disk-shaped main body part (25), a plurality of small rollers (26), a plurality of cam rollers (28), and a plurality of rotation restricting parts (27). The plurality of small rollers are arranged in the circumferential direction on one surface of the main body part. The plurality of cam rollers are arranged at positions eccentric with respect to the axes of the small rollers in the circumferential direction on the other surface of the main body part, are guided by the cam guide in the non-rotating range, and the radial distance from the center of the feed roller is restricted.

[0011] The plurality of rotation restricting parts include an eccentric support part (271) that supports the axis of the cam roller and a connecting part (272) that penetrates the main body part and is connected to the axis of the small roller. By restricting the position of the cam roller, the rotation of the small roller is restricted via the connecting part.

[0012] In the rotatable range, the small roller can rotate freely. In the non-rotating range, the workpiece is sandwiched between the small roller whose rotation is restricted and the chain roller and conveyed.

[0013] Thereby, the winding and conveying device (1) prevents the workpiece from slipping during conveyance and keeps the tension constant.

[0014] The winding and conveying method of the present invention is a winding and conveying method using the above-described winding and conveying device. In this winding and conveying method, within the rotatable range, the cam roller and the small roller can rotate integrally, and within the non-rotatable range, the workpiece is sandwiched and conveyed between the small roller with restricted rotation and the chain roller.

[0015] The winding and conveying device and the winding and conveying method of the present invention can prevent workpiece slippage during direction change and maintain a constant tension regardless of the type of workpiece.

Brief Description of the Drawings

[0016]

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Embodiments for Carrying Out the Invention

[0017] (One Embodiment) Hereinafter, a winding conveyance device and a winding conveyance method according to the present invention will be described with reference to the drawings. The winding conveyance device 1 of one embodiment is shown in FIGS. 1 to 13. As shown in FIG. 1, the winding conveyance device 1 includes a winding unit 10, a conveyance unit 20, a cam guide 76, and a chain device 70. The winding unit 10 winds the workpiece W around the core 12 by driving the winding motor 11. The workpiece W is, for example, CFRP (carbon fiber reinforced plastic) and is formed in a linear shape. The workpiece W may be made of a material other than CFRP. Also, the workpiece W may have a shape that can be wound, for example, a relatively wide tape shape or the like.

[0018] The conveyance unit 20 redirects the workpiece W by a feed roller 22 whose circumferential part on the outer periphery is defined as a non-rotating range and the part other than the non-rotating range is defined as a rotatable range, and sends it to the winding unit 10 side. The cam guide 76 is provided along the outer periphery of the non-rotating range of the feed roller 22. The chain device 70 drives a double-speed chain 71 to which a plurality of chain rollers 72 that contact the non-rotating range of the feed roller 22 are connected, while pressing it in the radially inward direction by a pressing portion 75, along the rotation direction of the feed roller 22.

[0019] As shown in FIGS. 2 to 7, the feed roller 22 includes a disk-shaped main body portion 25, a plurality of small rollers 26, a plurality of cam rollers 28, and a plurality of rotation restricting portions 27. The plurality of small rollers 26 are arranged in the circumferential direction on one surface of the main body portion 25. The plurality of cam rollers 28 are arranged at positions eccentric with respect to the axes of the small rollers 26 in the circumferential direction on the other surface of the main body portion 25, are guided by the cam guide 76 in the non-rotation range, and the radial distance from the center of the feed roller 22 is restricted. The plurality of rotation restricting portions 27 include an eccentric support portion 271 that supports the axes of the cam rollers 28 and a connecting portion 272 that penetrates the main body portion 25 and is connected to the axes of the small rollers 26. By restricting the position of the cam rollers 28, the rotation of the small rollers 26 is restricted via the connecting portion 272. In the present embodiment, both the small rollers 26 and the cam rollers 28 are cam followers.

[0020] The two cam rollers 28 are symmetrically arranged about the rotation axis X of the small roller 26. That is, the two cam rollers 28 erected on the eccentric support portion 271 can rotate about their respective eccentric axes, and at the same time, are connected to the rotation axis X of the small roller 26 via the connecting portion 272. The rotation restricting portion 27 on which the two cam rollers 28 are erected on the eccentric support portion 271 itself can also rotate (integrally with the small roller 26) about the rotation axis X. Note that the workpiece W is wound around each of the small rollers 26 on the small roller 26 side of the main body portion 25 and does not contact the rotation restricting portion 27 side of the main body portion 25.

[0021] With this configuration, as will be described later, the two cam rollers 28 can be guided by the cam guide 76 of the chain device 70 (FIG. 4). While being guided by the cam guide 76, the two cam rollers 28 maintain a state of being arranged side by side in the circumferential direction along the outer periphery of the main body portion 25 and cannot rotate about the rotation axis X. Therefore, the small roller 26 also cannot rotate about the rotation axis X and remains stationary along the outer periphery of the cam guide 76.

[0022] On the other hand, since the two cam rollers 28 can rotate while being guided by the cam guide 76, even when the main body 25 of the feed roller 22 is rotated by the feed motor 21, it abuts against the outer periphery of the cam guide 76 and moves along the outer periphery while rotating, so that friction with the outer periphery of the cam guide 76 is unlikely to occur and wear is suppressed.

[0023] As shown in FIGS. 2 to 4, the chain device 70 includes a double-speed chain 71 including chain rollers 72, a plurality of chain feed rollers 73, a drive unit 74, a pressing unit 75, and a cam guide 76, and the double-speed chain 71 is stretched over each chain feed roller 73. The chain feed roller 73 is a rotating body, and is driven by the drive unit 74 to rotate the double-speed chain 71 stretched thereover. In the present embodiment, the movement path of the double-speed chain 71 is defined by four chain feed rollers 73, and the chain feed rollers 73 are connected to the drive unit 74 (lower left in FIG. 2) to obtain a driving force.

[0024] In the present embodiment, since the diameter of the chain feed roller 73 is smaller than the diameter of the feed roller 22, the chain feed roller 73 rotates at a higher rotational speed than the feed roller 22 so as to advance the double-speed chain 71 in accordance with the peripheral speed of the feed roller 22.

[0025] As shown in FIGS. 8 and 9, the workpiece W is conveyed along the workpiece conveyance direction Wd while being sandwiched and fixed between the small rollers 26 of the feed roller 22 and the chain rollers 72 of the chain device 70. The inner peripheral portion of the cam guide 76 is indicated by a cam guide guide surface 76L (FIG. 9).

[0026] Here, the circumferential range of the feed roller 22 in which the small roller 26 can rotate is defined as the "rotatable range". Further, the circumferential range of the feed roller 22 in which the rotation of the small roller 26 is restricted is defined as the "non-rotatable range". The non-rotatable range is set along the path of the workpiece that changes direction, and the rotatable range is set inside the path of the workpiece that changes direction.

[0027] At this time, as shown in FIG. 10, within the rotatable range (double-arrowed broken line), the cam roller 28 of the rotation restricting portion 27 is not subject to the rotation restriction of the cam guide 76 (FIG. 9). At this time, even if the small roller 26 comes into contact with the adhesive surface of the workpiece W, it is pulled and rotates by itself at the moment of adhesion, so that the sticking and peeling phenomena of the workpiece W to the small roller 26 are suppressed. The connecting line of the rotation axes X of the small rollers 26 and the eccentric support portion 271 arranged along the outer periphery of the feed roller 22 is indicated by the rotation axis line Xn (dashed-dotted line).

[0028] On the other hand, as shown in FIG. 11, within the non-rotatable range (double-arrowed solid line), each cam roller 28 is subject to the rotation restriction of the cam guide 76, and aligns circumferentially along the cam guide guide surface 76L (dashed-dotted line, see FIG. 9) and the outer periphery of the feed roller 22 to become non-rotatable. The small roller 26 interlocked therewith also becomes non-rotatable. In the non-rotatable range, the small roller 26 and the chain roller 72 mesh with each other alternately to fix the workpiece W. At this time, further, the pressing portion 75 presses the chain roller 72 in the direction of the small roller 26 to make the fixed state of the workpiece W stronger.

[0029] As shown in FIG. 11, by forming the meshing state between each small roller 26 and each chain roller 72, a large number of contact regions (hereinafter, holding portion AA) between these two and the workpiece W sandwiched between these two are ensured. Thereby, slippage of the workpiece W is less likely to occur, and the tension is held high. Note that FIG. 10 corresponds to the rotatable range of FIGS. 8 to 9, and FIG. 11 corresponds to the non-rotatable range of FIGS. 8 to 9.

[0030] The tension adjusting portion 30 includes an adjusting roller 31, a slider 32, a tension motor 35 (tension actuator), and the like. The adjusting roller 31 has the workpiece W wound therearound between the conveying portion 20 and the winding portion 10. The adjusting roller 31 is fixed to the slider 32, and the slider 32 is movably provided on the rail 33. Hereinafter, the direction in which the slider 32 approaches the winding portion 10 is referred to as the approaching direction, and the direction in which they are separated is referred to as the separating direction.

[0031] The tension motor 35 is provided so as to be able to pull the slider 32 in the separating direction via a wire 36 (tension member). The wire 36 is wound around a pulley 361 fixed to the adjusting roller 31, one end is provided so as to be pullable by the tension motor 35, and the other end is fixed to a fixing portion 362.

[0032] That is, the tension motor 35 applies tension to the work W spanned from the winding portion 10 to the conveying portion 20 by pulling the slider 32 in the separating direction. The tension sensor 46 detects the tension of the work spanned from the winding portion 10 to the conveying portion 20 via the tension adjusting portion 30.

[0033] The tension control unit 50 controls the operation of the tension motor 35 based on the detected value of the tension sensor 46 so that the tension of the work W becomes a desired value. Accordingly, the slider 32 moves on the rail 33.

[0034] As shown in FIGS. 12 and 13, the adjusting roller 31 has a plurality of sub-rollers 312 which are cam followers provided in the circumferential direction of the holding portions 311 between the plurality of disk-shaped holding portions 311, and the work W is wound around each sub-roller 312. In the present embodiment, a large number of sub-rollers 312 are rotatably fixed between two disk-shaped holding portions 311, respectively.

[0035] The work W spanned over a large number of sub-rollers 312 has an adhesive surface containing resin. However, with this configuration, at the moment when the adhesive surface of the work W comes into contact with the sub-roller 312 and adhesion occurs, the sub-roller 312 rotates and follows by being pulled at that location, so that the adhered portion is not likely to increase. Therefore, fiber breakage of the work W is reduced.

[0036] In the winding and conveying method according to the present embodiment, in the rotatable range, the cam roller 28 and the small roller 26 are integrally rotatable, and in the non-rotatable range, the work W is sandwiched and conveyed between the small roller 26 whose rotation is restricted and the chain roller 72.

[0037] With the above configuration, the winding and conveying device 1 and the winding and conveying method can prevent the workpiece from slipping during direction change regardless of the type of workpiece, and can keep the tension constant. In addition, it is possible to reduce the adhesion of the adhesive workpiece to the roller and improve the peelability.

[0038] (Comparative Example) Here, in order to explain the features of this embodiment by comparing it with a comparative example (prior art), the comparative example and its problems will be described. For convenience of explanation, the same reference numerals are used for the configurations common to this embodiment (FIG. 1), and reference numerals with "_c" appended at the end are used for the configurations different from this embodiment for distinction.

[0039] As shown in FIG. 15, in the winding and conveying device 1_c of the comparative example, in the conveying unit 20_c, the tension of the workpiece W is maintained by pressing the workpiece W between two pressing parts 23_c and 24_c toward the feed roller 22_c side. Also, in the comparative example, in the tension adjustment unit 30_c, a simple disc-shaped adjustment roller 31_c is used.

[0040] Here, the contact area between the pressing parts 23_c and 24_c and the feed roller 22_c (with the workpiece W_c sandwiched therebetween) is defined as the holding part AA_c. At this time, as shown in FIG. 16(a), when both the pressing part 23_c and the feed roller 22_c are metal rollers, they contact only at the tangent of the cylindrical surface, so the area of the holding part AA_c is extremely small. For this reason, slippage occurred between the pressing part 23_c and the feed roller 22_c, and it was difficult to maintain a high tension.

[0041] Therefore, in the comparative example, in order to increase the area of the holding part AA_c and surely maintain the tension, as shown in FIG. 16(b), a flexible urethane rubber was used on the surfaces of the pressing parts 23_c and 24_c to increase the area of the holding part AA_c, thereby solving this problem. However, when a workpiece W such as CFRP having an adhesive surface was used, there were the following problems.

[0042] (1) Wear of the rubber roller In the urethane rubber roller of the comparative example, as the roller surface (urethane rubber) comes into contact with the adhesive surface of the workpiece W, the former gradually wears. Due to the fine urethane rubber scraped off from the roller surface by wear sticking to the surface of the workpiece W as foreign matter and causing the quality of the workpiece W to deteriorate, operations for removing foreign matter and removing the workpiece W with deteriorated quality were required. In addition, since cleaning and replacement operations of the urethane rubber roller were required in a short period for production maintenance, it was a factor causing a decrease in productivity.

[0043] (2) Attachment of Workpiece to Metal Roller On the other hand, since the surface of the cylindrical part of the feed roller 22_c and the adjustment roller 31_c is made of metal, an adhesive surface such as CFRP is likely to stick to the roller surface. That is, as shown in FIG. 17, (a) it sticks to the roller surface as the roller rotates, and (b) then, the workpiece W pulled by the winding part 10 peels off from the roller surface, so the workpiece W is likely to be disconnected (× mark), or even if it does not reach disconnection, the fibers near the surface are likely to be partially broken.

[0044] (Comparison) The winding and conveying device 1 solves these problems associated with the comparative example.

[0045] (1) Since wear during use occurs as long as a rubber roller is used, it is necessary to abolish the rubber roller itself to solve this problem. In the comparative example, the reason why the rubber roller was indispensable was that it was necessary to enlarge the holding part AA_c. Therefore, an alternative means for maintaining the holding part AA_c at the same level as the rubber roller is required. In the winding and conveying device 1, by using a feed roller 22 having a configuration completely different from that of the comparative example, the holding part AA is secured together with the chain device 70.

[0046] As described above, the feed roller 22 includes a large number of small rollers 26 and rotation restricting portions 27 that are integrally rotatable on both sides of the main body portion 25 along the circumferential direction of the main body portion 25. While each small roller 26 abuts against the workpiece W, the rotation of each small roller 26 is restricted by two cam rollers 28 and the cam guide 76 of the chain device 70. Further, in the winding and conveying device 1, the pressing portion 75 presses each double-speed chain 71 in the radially inner direction to make the rotation restriction more reliable.

[0047] (2) In order to avoid using rubber rollers that are inevitably worn, it is necessary to be composed only of metal rollers. Therefore, in the winding and conveying device 1, whether it is the feed roller 22 or the adjustment roller 31, by using a large number of cam followers (small rollers 26, sub-rollers 312) as a structural unit, the adhesion of the workpiece W having an adhesive surface is suppressed as much as possible, and the peelability is ensured. Ideally, the larger the number of each cam follower, the higher the effect of preventing adhesion and improving peelability is expected, but it can be appropriately changed according to the properties of the workpiece W.

[0048] (Other Embodiments) In the above embodiment, the tension actuator is composed of a motor. In other embodiments, the tension actuator may be an actuator other than a motor as long as it can pull the slider 32. Also, in the above embodiment, the tension motor is configured to drive the slider 32 by means of a wire 36 with a pulley. In other embodiments, as shown in FIG. 14, it may be configured to drive the slider 32 by means of a single wire 37. Also, in the above embodiment, the cam follower is configured as a structural unit of the feed roller and the adjustment roller. In other embodiments, it may be any rotatable member, not limited to the cam follower.

[0049] As described above, the present invention is not limited to the above embodiments, and can be implemented in various forms without departing from the spirit of the invention.

Explanation of Reference Numerals

[0050] 1... Winding and conveying device, 10... Winding part, 20... Conveying part 22... Feed roller, 25... Main body part, 26... Small roller 27... Rotation restricting part, 271... Eccentric support part, 272... Connecting part 28... Cam roller, 70... Chain device, 71... Double - speed chain 72... Chain roller, 73... Chain feed roller, 75... Pressing part 76... Cam guide, W... Workpiece

Claims

1. A winding part (10) for winding a workpiece (W); A conveying part (20) for changing the direction of the workpiece and sending it to the winding part side by a feed roller (22) whose part of the outer circumference in the circumferential direction is defined as a non-rotating range and the range other than the non-rotating range is defined as a rotatable range; A cam guide (76) provided along the outer circumference of the non-rotating range of the feed roller; A chain device (70) that drives a double-speed chain (71) to which a plurality of chain rollers (72) contacting the non-rotating range of the feed roller are connected, while pressing it in the radially inner direction by a pressing part (75) along the rotation direction of the feed roller. A winding and conveying device (1) comprising:

2. The feed roller is A disk-shaped main body part (25); A plurality of small rollers (26) arranged in the circumferential direction on one surface of the main body part; A plurality of cam rollers (28) arranged at positions eccentric with respect to the axes of the small rollers in the circumferential direction on the other surface of the main body part, guided by the cam guide in the non-rotating range, and the radial distance from the center of the feed roller is regulated; Including an eccentric support part (271) for supporting the axis of the cam roller and a connecting part (272) that penetrates the main body part and is connected to the axis of the small roller, and a plurality of rotation regulating parts (27) that regulate the rotation of the small roller via the connecting part by regulating the position of the cam roller. The winding and conveying device according to claim 1, wherein In the rotatable range, the small roller is rotatable; In the non-rotating range, the workpiece is sandwiched and conveyed between the small roller whose rotation is regulated and the chain roller. The winding and conveying device according to claim 1.

3. An adjusting roller (31) around which the workpiece is wound is attached between the conveying part and the winding part, and further includes a slider (32) that is pulled by a tension actuator (35) and is movable. The adjusting roller is Two disk-shaped holding parts (311); A plurality of rotatable sub-rollers (312) provided in the circumferential direction between the holding parts around which the workpiece is wound. The winding and conveying device according to claim 2.

4. A winding part (10) for winding a workpiece (W); A conveying part (20) for changing the direction of the workpiece and sending it to the winding part side by a feed roller (22) whose part of the outer circumference in the circumferential direction is defined as a non-rotating range and the range other than the non-rotating range is defined as a rotatable range; ​ ​ A cam guide (76) provided along the outer periphery of the non-rotating range of the feed roller; A chain device (70) that drives a double-speed chain (71) to which a plurality of chain rollers (72) contacting the non-rotating range of the feed roller are connected, while pressing it in the radially inward direction by a pressing portion (75), along the rotation direction of the feed roller. A winding and conveying method using a winding and conveying device (1).

5. In the winding and conveying device, The feed roller includes A disk-shaped main body portion (25); A plurality of small rollers (26) arranged in the circumferential direction on one surface of the main body portion; A plurality of cam rollers (28) arranged at positions eccentric with respect to the axes of the small rollers in the circumferential direction on the other surface of the main body portion, guided by the cam guide in the non-rotating range, and having the radial distance from the center of the feed roller regulated; An eccentric support portion (271) that supports the axes of the cam rollers, and a connecting portion (272) that penetrates the main body portion and is connected to the axes of the small rollers, and a plurality of rotation regulating portions (27) that regulate the rotation of the small rollers via the connecting portion by regulating the positions of the cam rollers; In the rotatable range, the small rollers are rotatable; The winding and conveying method according to claim 5, wherein in the non-rotating range, the workpiece is sandwiched and conveyed between the small rollers with rotation restricted and the chain rollers.

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