Unvulcanized rubber sheet material winding device and method

Abstract

To provide a winding device and method for unvulcanized rubber sheet members and liners that enable smooth winding onto a winding shaft while suppressing the occurrence of wrinkles and slack.SOLUTION: The drive shaft 8 and the winding shaft 4 are arranged with their outer peripheral surfaces facing each other. The winding shaft 4 comprises a shaft portion 5 and a cylindrical winding cell 6 fitted over the shaft portion 5, with the outer peripheral surface of the winding cell 6 made capable of oscillating to approach and retract relative to the outer peripheral surface of the drive shaft 8, starting from a protrusion 5a extending outward from the longitudinal center of the shaft portion 5. By rotationally driving the drive shaft 8, a liner L is superimposed and wound onto the unvulcanized rubber sheet member S supplied to the winding cell 6. and by rotating the winding cell 6 via the rotationally driven drive shaft 8 through the wound sheet member S and liner L, the sheet member S is wound onto the winding cell 6 with the liner L interposed.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a winding device and method for unvulcanized rubber sheet materials, and more specifically to a winding device and method for unvulcanized rubber sheet materials that can smoothly wind up an unvulcanized rubber sheet material around a winding shaft with a liner interposed therebetween while suppressing wrinkles and slack that occur in the unvulcanized rubber sheet material and liner. [Background technology]

[0002] In manufacturing sites for rubber products such as tires, a long unvulcanized rubber sheet material extruded by an extruder or the like is sometimes temporarily stored by being wound around a winding shaft with a liner interposed therebetween. When needed, the wound long unvulcanized rubber sheet material is unwound from the winding shaft and cut to a specified length for use. In this winding process, the winding shaft and a drive shaft are arranged with their outer peripheral surfaces facing each other. The unvulcanized rubber sheet material supplied by the rotating drive shaft passes between the winding shaft and the drive shaft together with the liner unwound from the winding core, and the two are wound onto the winding shaft in an overlapping state. The winding shaft is rotated by the rotational driving force imparted from the drive shaft via the unvulcanized rubber sheet material and the liner wound around the winding shaft. In other words, the winding shaft is rotated not by a direct rotational drive system but by a so-called surface system.

[0003] Because unvulcanized rubber sheet members are relatively prone to deformation, their thickness may vary slightly across the width of the sheet. Furthermore, due to insufficient parallelism adjustment of the winding shaft or the drive shaft, the unvulcanized rubber sheet member or the liner may be pressed unevenly across the width of the sheet against the winding shaft. As a result, wrinkles or slack may occur in the unvulcanized rubber sheet member or the liner wound around the winding shaft, preventing smooth winding.

[0004] Various methods have been proposed for preventing wrinkles and other problems in resin film sheets and metal film sheets when they are wound up (see, for example, Patent Documents 1 and 2). These proposals employ a system in which the winding shaft is directly driven to rotate, and measures are taken to address the problem of wrinkles occurring in the sheet due to bending of the winding shaft. However, as described above, the cause of wrinkles and slack in unvulcanized rubber sheet members and liners is not due to bending of the winding shaft. Therefore, these proposed methods cannot fully prevent wrinkles and slack in unvulcanized rubber sheet members and liners. Therefore, there is room for improvement in smoothly winding unvulcanized rubber sheet members and liners while suppressing wrinkles and slack. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-277168 [Patent Document 2] Japanese Patent Application Publication No. 10-175755 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide a winding device and method for unvulcanized rubber sheet materials that can be smoothly wound around a winding shaft with a liner interposed therebetween while suppressing wrinkles and sagging that occur in the unvulcanized rubber sheet material and liner. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the winding device for unvulcanized rubber sheet materials of the present invention has a drive shaft and a winding shaft arranged with their outer surfaces facing each other, and by rotating the drive shaft, the supplied unvulcanized rubber sheet material is wound around the winding shaft together with a liner, and by rotating the winding shaft using the rotationally driven drive shaft, the unvulcanized rubber sheet material and the liner wound around the winding shaft are wound around the winding shaft with the liner interposed therebetween, and is characterized in that the winding device for unvulcanized rubber sheet materials is equipped with a swinging mechanism that swings the outer surface of the winding shaft towards and away from the outer surface of the drive shaft, starting from the longitudinal center of the winding shaft.

[0008] The method for winding an unvulcanized rubber sheet member of the present invention involves positioning a drive shaft and a winding shaft with their outer peripheral surfaces facing each other, rotating the drive shaft to supply an unvulcanized rubber sheet member and winding it around the winding shaft together with a liner, and rotating the winding shaft via the unvulcanized rubber sheet member and the liner wound around the winding shaft, thereby winding the unvulcanized rubber sheet member around the winding shaft with the liner interposed between them.The method is characterized in that the outer peripheral surface of the winding shaft is made movable towards and away from the outer peripheral surface of the drive shaft, starting from the longitudinal center of the winding shaft, and the unvulcanized rubber sheet member is wound around the winding shaft with the liner interposed between them. [Effects of the Invention]

[0009] According to the present invention, when the unvulcanized rubber sheet member is wound around the winding shaft with the liner interposed therebetween, if the thickness of the unvulcanized rubber sheet member varies in the sheet width direction, the outer peripheral surface of the winding shaft oscillates toward and away from the outer peripheral surface of the drive shaft, starting from the longitudinal center of the winding shaft, in accordance with the variation in thickness in the sheet width direction. This prevents the unvulcanized rubber sheet member and the liner from being strongly pressed against one side in the sheet width direction between the outer peripheral surfaces of the winding shaft and the drive shaft. As a result, localized tension is suppressed from acting on the unvulcanized rubber sheet member and the liner wound around the winding shaft, which is advantageous for smooth winding while suppressing wrinkles and slack in the unvulcanized rubber sheet member and the liner. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an explanatory diagram illustrating an embodiment of a winding device as seen from the side; [Figure 2] 2 is an explanatory diagram illustrating the winding device of FIG. 1 as seen from the front. FIG. [Figure 3] 2 is an explanatory diagram illustrating the winding shaft of FIG. 1 in axial cross section. FIG. [Figure 4] 4 is an explanatory diagram illustrating the winding shaft and the pivot support portion of the frame in FIG. 3 in a separated state as seen from the side. FIG. [Figure 5] 10A and 10B are explanatory diagrams illustrating a swing state of the winding shaft in a schematic cross-sectional view. [Figure 6] 2 is an explanatory view illustrating a state in which an unvulcanized rubber sheet member is being wound around the winding shaft of FIG. 1 with a liner interposed therebetween. FIG. [Figure 7] 10 is an explanatory diagram illustrating a cross-sectional view of a state in which an unvulcanized rubber sheet member and a liner pass between a winding shaft and a drive shaft. FIG. [Figure 8] 10A and 10B are explanatory diagrams illustrating modified examples of the winding shaft in a schematic cross-sectional view. [Figure 9] FIG. 10 is an explanatory diagram showing a schematic cross-sectional view of another modified example of the winding shaft. [Figure 10]FIG. 10 is an explanatory diagram showing a schematic cross-sectional view of yet another modified example of the winding shaft. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

[0012] The embodiment of the winding device 1 for an unvulcanized rubber sheet member shown in Figures 1 and 2 includes a winding shaft 4, a drive shaft 8, and a liner stock section 9. This winding device 1 winds a long unvulcanized rubber sheet member S (hereinafter referred to as sheet member S) onto the winding shaft 4 with a liner L interposed therebetween. The sheet member S is used as a material for manufacturing various rubber products such as tires.

[0013] The sheet material S is supplied to the drive shaft 8 from a rubber extrusion device, a rolling device, or similar device. In other words, the sheet material S is transported and supplied to the winding device 1 by the rotationally driven drive shaft 8. Examples of the sheet material S include various known types of material, such as tire tread rubber and side rubber made only of unvulcanized rubber, and carcass material made of unvulcanized rubber and reinforcing cords. In this embodiment, the sheet material S is stretched around a rotating roller 10 before being supplied to the drive shaft 8. An appropriate number of rotating rollers 10 can be installed at appropriate positions.

[0014] The size of the sheet member S varies depending on the type, but the thickness is, for example, 0.6 mm to 1.3 mm. The sheet member S contains unvulcanized rubber, so it is prone to adhesion and is relatively prone to deformation. Therefore, when the sheet member S is wound around the winding shaft 4, a liner L is inserted between the sheet members S to prevent them from sticking together.

[0015] The liner L is made of various known resin films that prevent adhesion between the sheet members S. The thickness of the liner L is, for example, 0.145 mm to 0.77 mm. A liner L that is wider than the width of the sheet member S is used.

[0016] The winding shaft 4 is journaled to the frame 2. The frame 2 is formed with a pair of recessed journal support portions 2a and a pair of recessed journal support portions 2b. The winding shaft 4 is rotatably supported by one of the journal support portions 2a, 2a, and the winding core 9a is rotatably supported by the other journal support portions 2b, 2b. The winding shaft 4 is restricted from moving in the axial direction by the journal support portions 2a, 2a, so that it does not move substantially in the axial direction. The winding core 9a is restricted from moving in the axial direction by the journal support portions 2b, 2b, so that it does not move substantially in the axial direction. The winding shaft 4 and the winding core 9a are detachable from the frame 2 (the journal support portions 2a, 2b) and can be easily attached and detached. The winding shaft 4 and the winding core 9a are arranged substantially parallel to each other, and as shown in FIG. 1, the winding shaft 4 is installed diagonally below the winding core 9a.

[0017] A liner L is wound around the winding core 9a, forming a liner stock section 9. The liner L unwound from the liner stock section 9 is wound around a rotating roller 10 installed on the frame 2 on the way to being supplied to the winding shaft 4. Any number of rotating rollers 10 can be installed at any desired positions.

[0018] The frame 2 is supported by a pivot shaft 2c on an upright support 3 and can pivot up and down about the pivot shaft 2c. Therefore, the winding shaft 4 and the liner stock section 9 can pivot up and down together about the pivot shaft 2c.

[0019] The winding shaft 4 and the drive shaft 8 are arranged with their outer peripheral surfaces facing each other. Therefore, the drive shaft 8 and the winding shaft 4 are arranged substantially parallel, and in this embodiment, the drive shaft 8 is arranged below the winding shaft 4. The opposing outer peripheral surfaces of the winding shaft 4 and the drive shaft 8 each have a constant outer diameter. The drive shaft 8 is driven to rotate by a known drive source such as a drive motor. The drive shaft 8 is installed at a predetermined fixed position and driven to rotate, without rotating integrally with the winding shaft 4 and the liner stock section 9 around the pivot axis 2c. The drive shaft 8 is, for example, a cylindrical body made of a highly rigid metal. The rotational speed of the drive shaft 8 is set to an appropriate rotational speed depending on the specifications of the sheet material S, etc.

[0020] The outer peripheral surface of the winding shaft 4 swings toward and away from the outer peripheral surface of the drive shaft 8, starting from the longitudinal center of the winding shaft 4 (a region including the longitudinal center). More specifically, as shown in FIGS. 3 and 4, in this embodiment, the winding shaft 4 has a shaft portion 5 and a cylindrical winding cell 6. The shaft portion 5 is made of a rigid material such as metal, and the main portion of the winding cell 6 is also made of a rigid material such as metal. The outer peripheral surface of the winding cell 6 can also be made of resin or other materials.

[0021] A through hole 7 extending in the axial direction is formed in the winding cell 6, and the shaft portion 5 is inserted into and passes through the through hole 7. A protrusion is provided in the longitudinal center of the surface of the shaft portion 5 as a protrusion 5a that protrudes more radially outward than other positions in the longitudinal direction of the shaft portion. The protrusion 5a is formed, for example, from a rigid material similar to the metal that forms the shaft portion 5 or the winding cell 6. The protrusion 5a abuts against the inner circumferential surface of the through hole 7 at the longitudinal center of the through hole 7. The protrusion 5a may be formed in a continuous ring shape on the surface of the shaft portion 5 in the circumferential direction, or may be formed intermittently in the circumferential direction.

[0022] The shaft portion 5 includes a central axis 5b, an outer cylinder 5c through which the central axis 5b passes, and annular bearings 5d, 5d located at both longitudinal ends of the outer cylinder 5c between the central axis 5b and the outer cylinder 5c. The outer cylinder 5c is a cylindrical body with constant inner and outer diameters. Both longitudinal ends of the central axis 5b are held and fixed by the bearing supports 2a, 2a. Therefore, in this embodiment, the outer cylinder 5c rotates around the central axis 5b. The protrusion 5a protrudes from the longitudinal center of the outer cylinder 5c, and the winding cell 6 rotates around the central axis 5b together with the protrusion 5a and the outer cylinder 5c. In other words, the rotation of the protrusion 5a together with the winding cell 6 and the outer cylinder 5c is advantageous in preventing wear of the protrusion 5a due to this rotation.

[0023] In this embodiment, the cross sections of the shaft portion 5 (outer cylinder 5c) and the through hole 7 are square, and the protrusions 5a are provided on each of the four sides of the square cross section of the shaft portion 5 (outer cylinder 5c). The cross sections of the shaft portion 5 (outer cylinder 5c) and the through hole 7 are not limited to square, and may be circular, triangular, pentagonal, or other polygonal shapes.

[0024] 5, the outer peripheral surface of the winding shaft 4 (winding cell 6) oscillates with the protrusion 5a as the starting point. Therefore, the protrusion 5a functions as a oscillating mechanism that oscillates the outer peripheral surface of the winding shaft 4 (winding cell 6) so as to approach and move away from the outer peripheral surface of the drive shaft 8.

[0025] The axial length W1 of the protrusion 5a is set, relative to the axial length W of the winding shaft 4 (winding cell 6), so as to satisfy, for example, 1.67W≦100W1≦6.7W. Furthermore, the protrusion height h of the protrusion 5a from the outer peripheral surface of the shaft portion 5 is set, for example, so as to satisfy, for example, 16.7H≦100h≦46.7H. Here, H = inner diameter D of the through hole 7 - outer diameter D1 of the shaft portion 5 (H = D - D1). By setting the axial length W1 and protrusion height h of the protrusion 5a in this manner, the outer peripheral surface of the winding shaft 4 (winding cell 6) can be swung toward and away from the outer peripheral surface of the drive shaft 8, starting from the protrusion 5a.

[0026] Next, an example of a procedure for winding the sheet member S onto the winding shaft 4 with the liner L interposed therebetween will be described.

[0027] As shown in FIGS. 1 and 2, the sheet material S is hung on the drive shaft 8, and the liner L is paid out from the liner stock section 9. Then, the sheet material S and the liner L are passed in an overlapping state between the winding shaft 4 and the drive shaft 8. The overlapping sheet material S and liner L are pressed against the winding shaft 4 and the drive shaft 8. The sheet material S and liner L that have passed between the winding shaft 4 and the drive shaft 8 are wound around the winding shaft 4.

[0028] In this state, by driving and rotating the drive shaft 8, the sheet material S continues to be supplied to the winding device 1. Furthermore, the rotational driving force from the drive shaft 8 is applied to the winding shaft 4 via the sheet material S and liner L wound around the winding shaft 4, causing the winding shaft 4 to rotate. In other words, the winding shaft 4 is rotated by the so-called surface method. The overlapping sheet material S and liner L pass between the winding shaft 4 and the drive shaft 8 and continue to be wound around the winding shaft 4. As a result, the sheet material S is wound around the winding shaft 4 with the liner L interposed therebetween.

[0029] 6, as the sheet material S is wound around the winding shaft 4 with the liner L therebetween, the outer diameter of the sheet material S and liner L wound around the winding shaft 4 gradually increases. As a result, the winding shaft 4 pivots upward about the pivot axis 2c, and the axial distance between the winding shaft 4 and the drive shaft 8 increases. Note that the winding shaft 4 (the winding shaft 4 around which the sheet material S and liner L are wound) is always trying to move downward due to gravity, so the sheet material S and liner L passing between the winding shaft 4 and the drive shaft 8 are always pressed from above by the winding shaft 4 (the winding shaft 4 around which the sheet material S and liner L are wound).

[0030] In this winding device 4, when the thickness of the sheet material S varies in the sheet width direction as illustrated in Fig. 7, the outer peripheral surface of the winding shaft 4 (winding cell 6) swings from the protrusion 5a as a starting point so as to approach and move away from the outer peripheral surface of the drive shaft 8 in accordance with the variation in thickness in the sheet width direction. In other words, the outer peripheral surface of the winding shaft 4 (winding cell 6) tilts relative to the axial direction from the protrusion 5 as a starting point.

[0031] This swinging function of the protrusions 5a prevents the sheet material S and the liner L from being pressed strongly on one side in the sheet width direction between the outer circumferential surface of the winding shaft 4 (winding cell 6) and the outer circumferential surface of the drive shaft 8. For example, if one side in the sheet width direction of the sheet material S and the liner L is pressed strongly on one side, the outer circumferential surface of the winding shaft 4 (winding cell 6) tilts with the protrusions 5a as the starting point, and the one side in the sheet width direction of the outer circumferential surface of the winding shaft 4 (winding cell 6) swings so that it moves away from the outer circumferential surface of the drive shaft 8 and the other side in the sheet width direction of the outer circumferential surface of the winding shaft 4 (winding cell 6) approaches the outer circumferential surface of the drive shaft 8. When the other side of the sheet width direction of the sheet material S and the liner L is pressed strongly in a biased manner, the outer peripheral surface of the winding shaft 4 (winding cell 6) tilts from the protrusion 5 as a starting point, and the other side of the outer peripheral surface of the winding shaft 4 (winding cell 6) in the sheet width direction moves away from the outer peripheral surface of the drive shaft 8, while one side of the outer peripheral surface of the winding shaft 4 (winding cell 6) in the sheet width direction swings closer to the outer peripheral surface of the drive shaft 8. As a result, localized tension is suppressed from acting on the sheet material S and the liner L, which is advantageous for smooth winding while suppressing wrinkles and slack in the sheet material S and the liner L.

[0032] When the winding shaft 4 is configured to have protrusions (projections) 5a on the outer peripheral surface of the shaft portion 5, the work of forming the protrusions (projections) 5a becomes easier. For example, the protrusions (projections) 5a can be integrated with the outer peripheral surface of the shaft portion 5 by joining the protrusions (projections) 5a to the outer peripheral surface of the shaft portion 5 by welding or the like. Alternatively, the protrusions (projections) 5a can be provided integrally with the outer peripheral surface of the shaft portion 5 by cutting the outer peripheral surface of the shaft portion 5 so as to leave the protrusions (projections) 5a.

[0033] When the protrusion (projection) 5a is worn out, maintenance is improved by simply joining a new protrusion (projection) 5a by welding or the like to the outer circumferential surface of the shaft portion 5. Alternatively, when the protrusion (projection) 5a is worn out, the shaft portion 5 can be replaced with a new shaft portion 5 as a consumable item.

[0034] As described above, by setting the axial length W1 and protrusion height h of the protrusions 5a, it is possible to appropriately oscillate the outer peripheral surface of the winding shaft 4 (winding cell 6), which is even more advantageous for smooth winding while suppressing wrinkles and slack in the sheet material S and liner L. Note that the optimal values ​​for the axial length W1 and protrusion height h of the protrusions 5a vary slightly depending on the specifications of the sheet material S and liner L, so it is preferable to determine appropriate values ​​by conducting a preliminary test or the like. Note that by setting the axial length W1 and protrusion height h of the protrusions 5a as described above, it is possible to practically accommodate a variety of sheet material S and liner L specifications.

[0035] The above-described rocking mechanism is not limited to the configuration of this embodiment, and various other configurations can be adopted. Other configurations of the rocking mechanism are shown in Figures 8 to 10. Note that the various arrangements described for the winding shaft 4 of this embodiment can also be adopted for the winding shaft 4 shown in Figures 8 to 10.

[0036] The winding shaft 4 illustrated in FIG. 8 differs from the winding shaft 4 illustrated in FIG. 5 only in the protrusion (projection) 5a. In this winding shaft 4, the protrusion 5a is formed by gradually increasing the outer diameter of the shaft portion 5 from both longitudinal ends toward the longitudinal center. The outer diameter of the shaft portion 5 is outer diameter D1 at both ends of the winding cell 6, but gradually increases toward the longitudinal center. The protrusion 5a is the portion of the shaft portion 5 that protrudes most outward from the longitudinal center and constitutes a swing mechanism. The protrusion 5a has an axial length W1, and the amount by which the outer diameter D1 of the shaft portion 5 protrudes from the outer peripheral surface at both ends of the winding cell 6 is a protrusion height h of the protrusion 5a.

[0037] 5, the protrusion (projection) 5a is formed as a step, but the protrusion 5a is not a step on this winding shaft 4. Therefore, even if the shaft portion 5 is repeatedly inserted and removed from the through-hole 7, the protrusion 5a is less likely to wear out, which is advantageous for extending the life of the protrusion 5a.

[0038] The winding shaft 4 illustrated in Fig. 9 differs from the winding shaft 4 illustrated in Fig. 5 only in that, instead of the protrusion (projection) 5a provided on the shaft portion 5 of the winding shaft 4, a protrusion 7a is provided on the through hole 7 formed in the cylindrical winding cell 6. In this winding shaft 4, a protrusion is provided in the longitudinal center of the through hole 7 as the protrusion 7a that protrudes more inward than other positions in the longitudinal direction of the through hole 7.

[0039] The protrusion 7a is the part that protrudes most inward from the longitudinal center of the through hole 7, and constitutes the swing mechanism. This protrusion 7a abuts against the outer peripheral surface of the shaft portion 5 at the longitudinal center of the through hole 7. The protrusion 7a may be formed in a continuous ring shape in the circumferential direction on the surface of the through hole 7, or may be formed intermittently in the circumferential direction.

[0040] The protrusion 7a has an axial length W1, and the amount by which the protrusion 7a protrudes from the inner peripheral surface of the inner diameter D of the through-hole 7 is a protrusion height h. In the winding shaft 4 of FIG. 5, the protrusions (protrusions) 5a are formed as steps on the outer peripheral surface of the shaft portion 5, but with this winding shaft 4, the outer diameter of the shaft portion 5 can be made constant, and machining of the shaft portion 5 is also easier.

[0041] The winding shaft 4 illustrated in FIG. 10 differs from the winding shaft 4 illustrated in FIG. 9 only in the protrusion (projection) 7a. In this winding shaft 4, the protrusion 7a is formed by gradually decreasing the inner diameter of the through-hole 7 from both longitudinal ends toward the longitudinal center. The inner diameter of the through-hole 7 is inner diameter D at both ends of the winding cell 6, but gradually decreases toward the longitudinal center. The protrusion 7a is the portion of the through-hole 7 that protrudes most inward from the longitudinal center and constitutes a swing mechanism. The protrusion 7a has an axial length W1, and the amount by which the protrusion 7a protrudes from the inner circumferential surface of the through-hole 7, which has inner diameter D at both ends of the winding cell 6, is protrusion height h.

[0042] 9, the protrusion (projection) 7a is formed as a step, but the protrusion 7a is not a step on this winding shaft 4. Therefore, even if the shaft portion 5 is repeatedly inserted and removed from the through-hole 7, the protrusion 7a is less likely to wear out, which is advantageous for extending the life of the protrusion 7a.

[0043] The present invention can be applied to the manufacturing process of pneumatic tires, various types of tires, and various other rubber products. [Explanation of symbols]

[0044] 1 Winding device 2 frames 2a, 2b shaft support 2c Swivel axis 3 pillars 4 Winding shaft 5 Shaft section 5a Projection (protrusion) 5b Center axis 5c Outer barrel 5d bearing 6 Winding Cell 7 through holes 7a Projection (protrusion) 8 drive shaft 9 Liner Stock Section 9a winding core 10 rotating rollers S Unvulcanized rubber sheet material L Liner

Claims

1. A winding device for an unvulcanized rubber sheet member has a drive shaft and a winding shaft arranged with their outer peripheral surfaces facing each other, and by rotating the drive shaft, a supplied unvulcanized rubber sheet member is wound around the winding shaft together with a liner, and by rotating the winding shaft with the drive shaft rotating, the unvulcanized rubber sheet member and the liner wound around the winding shaft are wound around the winding shaft with the liner interposed therebetween, A winding device for an unvulcanized rubber sheet member, comprising a swinging mechanism that swings the outer surface of the winding shaft toward and away from the outer surface of the drive shaft, starting from the longitudinal center of the winding shaft.

2. the winding shaft has a shaft portion and a cylindrical winding cell having a through hole extending in an axial direction and through which the shaft portion passes, and the unvulcanized rubber sheet member is wound around the winding cell with the liner interposed therebetween, A winding device for an unvulcanized rubber sheet member as described in claim 1, wherein the shaft portion has a protrusion at the longitudinal center that protrudes more radially outward than other positions in the longitudinal direction of the shaft portion, and the protrusion constitutes the swinging mechanism.

3. 3. The winding device for an unvulcanized rubber sheet member according to claim 2, wherein the protrusion is a projection disposed at the center of the shaft in the longitudinal direction.

4. 3. The winding device for an unvulcanized rubber sheet member according to claim 2, wherein the protrusion is formed by gradually increasing the outer diameter of the shaft portion from both longitudinal ends toward the longitudinal center.

5. the winding shaft has a shaft portion and a cylindrical winding cell having a through hole extending in an axial direction and through which the shaft portion passes, and the unvulcanized rubber sheet member is wound around the winding cell with the liner interposed therebetween, A winding device for an unvulcanized rubber sheet member as described in claim 1, wherein a protrusion is provided in the longitudinal center of the through hole that protrudes more inward than other positions in the longitudinal direction of the through hole, and the protrusion constitutes the swinging mechanism.

6. 6. The winding device for an unvulcanized rubber sheet member according to claim 5, wherein the protrusion is a projection disposed at the center of the through hole in the longitudinal direction.

7. 6. The winding device for an unvulcanized rubber sheet member according to claim 5, wherein the protrusions are formed by gradually decreasing the inner diameter of the through hole from both longitudinal ends toward the longitudinal center.

8. A method for winding an unvulcanized rubber sheet member, comprising: arranging a drive shaft and a winding shaft with their outer peripheral surfaces facing each other; rotating the drive shaft to supply an unvulcanized rubber sheet member and wind it together with a liner around the winding shaft; and rotating the winding shaft via the unvulcanized rubber sheet member and the liner wound around the winding shaft, thereby winding the unvulcanized rubber sheet member onto the winding shaft with the liner interposed therebetween, A method for winding an unvulcanized rubber sheet member, in which the unvulcanized rubber sheet member is wound onto the winding shaft with the liner interposed therebetween, while allowing the outer surface of the winding shaft to swing toward and away from the outer surface of the drive shaft, starting from the longitudinal center of the winding shaft.

Images