Rubber member winding device and rubber member winding method

Abstract

To provide a rubber member winding device and a rubber member winding method suppressing deformation of the rubber member caused by winding tightening of a liner.SOLUTION: A rubber member winding device has a winding body for winding the continuously supplied tabular rubber member, a liner supply part supplying the liner wound to the winding body together with the rubber member, and a liner tension adjusting part for loosening the tension of the liner according to winding length increase of the rubber member. A rubber member winding method winding the liner together with the continuously supplied tabular rubber member controls to loosen the tension of the liner, according to winding length increase of the rubber member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a rubber member winding device and a rubber member winding method. [Background technology]

[0002] Patent Document 1 discloses a rubber material winding device that includes a winding body for winding up a rubber material and a liner interposed between the rubber material, and the liner is constantly under tension to prevent wrinkles, etc. However, with this rubber material winding device, if the wound length of the rubber material becomes large, back tension may occur, causing the liner to tighten, which may deform the rubber material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-20005 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present disclosure is to provide a rubber member winding device and a rubber member winding method that suppress deformation of a rubber member due to tightening of a liner. [Means for solving the problem]

[0005] The rubber material winding device of the present disclosure includes a winding body for winding a continuously supplied plate-shaped rubber material, a liner supply unit for supplying a liner to be wound onto the winding body together with the rubber material, and a liner tension adjustment unit for loosening the tension of the liner as the winding length of the rubber material increases.

[0006] The rubber material winding method disclosed herein involves winding a liner onto a winding body along with a continuously supplied plate-shaped rubber material, and controls the tension of the liner to be relaxed as the winding length of the rubber material increases. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a plan view of a rubber member winding device according to an embodiment of the present invention; [Figure 2] FIG. 10 is a side view of the rubber member winding device according to the embodiment. [Figure 3] FIG. 10 is a diagram showing the relationship between the winding length of the rubber member and the braking pressure of the brake device. DETAILED DESCRIPTION OF THE INVENTION

[0008] <Embodiment 1> Hereinafter, embodiments of a rubber member winding device and a rubber member winding method according to the present disclosure will be described with reference to Figures 1 to 3. Note that in each figure, the dimensional ratios in the drawing do not necessarily match the actual dimensional ratios, and the dimensional ratios between the drawings do not necessarily match either.

[0009] First, the rubber member winding device will be described with reference to FIGS.

[0010] As shown in Figures 1 and 2, the rubber material winding device 1 includes a winding body 2 for winding a continuously supplied plate-shaped rubber material M1, a drive unit 3 and a first rotating shaft 4 for rotating the winding body 2, and a liner supply unit 5 for supplying a liner L1 to be wound onto the winding body 2 together with the rubber material M1.

[0011] The rubber member M1 is formed in a long plate shape. In this embodiment, the rubber member M1 is used as a tread rubber that constitutes a tire, but is not limited to this. For example, the rubber member M1 can be used as a sidewall rubber, an inner liner rubber, or the like that constitutes a tire.

[0012] The winding body 2 is formed in a cylindrical shape. In this embodiment, the winding body 2 is formed in a bobbin shape including a cylindrical first cylindrical portion 21 and a pair of first flanges 22, 22 disposed on both side ends of the first cylindrical portion 21, but is not limited to this.

[0013] The diameter D1 of the first cylindrical portion 21 is preferably 500 mm to 1000 mm. When the diameter D1 is 500 mm or more, the winding thickness of the rubber member M1 wound around the winding body 2 is reduced, and deformation of the rubber member M1 due to load can be suppressed. When the diameter D1 is 1000 mm or less, a winding allowance for the rubber member M1 around the winding body 2 can be secured and an increase in the size of the winding body 2 can be suppressed.

[0014] In this embodiment, the drive unit 3 includes a drive motor 31 and a reducer 32, but is not limited to this. For example, the drive unit 3 may be configured without the reducer 32. For example, a servo motor or a stepping motor may be used as the drive motor 31. In this embodiment, the reducer 32 is a worm reducer of an orthogonal axis type, but it may also be a reducer of a parallel axis type, for example.

[0015] In this embodiment, the drive unit 3 includes a first connecting shaft 33 that is attached to the reducer 32 and can be connected to the first rotating shaft 4, but is not limited to this. For example, the drive motor 31 or the reducer 32 may be attached directly to the first rotating shaft 4. The first connecting shaft 33 is a rotating shaft that extends in the axial direction SD1 of the first rotating shaft 4 and transmits the driving force of the drive motor 31 to the first rotating shaft 4.

[0016] The first connecting shaft 33 includes a first connecting portion 331 that can be connected to the first rotating shaft 4. The first connecting portion 331 is disposed at the end of the first connecting shaft 33 on the first rotating shaft 4 side. In this embodiment, the first connecting portion 331 includes a plurality of first protrusions 331a that protrude toward the first rotating shaft 4 side.

[0017] The drive unit 3 may be configured to include, for example, a drive roller for rotating the first flange 22 of the winding body 2. In such a configuration, the winding body 2 is rotated by rotating the first flange 22 with the drive roller.

[0018] The first rotating shaft 4 includes a first connected part 41 that is connected to the first connecting part 331. In this embodiment, the first connected part 41 is formed in a disk shape and is arranged at the end of the first rotating shaft 4 on the first connecting part 331 side. The first connected part 41 includes a plurality of first fitting holes 411 that can fit the first protrusions 331a. The first connecting part 331 is connected to the first connected part 41 by fitting the first protrusions 331a into the first fitting holes 411. Note that the connection structure between the first connecting part 331 and the first connected part 41 is not limited to the above.

[0019] The liner supply section 5 includes a liner supply body 51 around which the liner L1 is wound, a second rotation shaft 52 for rotating the liner supply body 51, and a guide roller 53 for guiding the supply of the liner L1. Note that the guide roller 53 is not shown in FIG. 1.

[0020] The liner L1 is a long member that is wider than the rubber member M1. The liner supply body 51 is formed in a cylindrical shape. In this embodiment, the liner supply body 51 is formed in a bobbin shape that includes a cylindrical second cylindrical portion 511 and a pair of second flanges 512, 512 disposed on both side ends of the second cylindrical portion 511, but is not limited to this. A diameter D2 of the second cylindrical portion 511 is smaller than a diameter D1 of the first cylindrical portion 21.

[0021] The second rotating shaft 52 extends along the axial direction SD1 and is disposed adjacent to the first rotating shaft 4 at a position where the winding body 2 and the liner supply body 51 do not interfere with each other. In this embodiment, the second rotating shaft 52 is disposed adjacent to the lateral side of the first rotating shaft 4, but this is not limiting. For example, the second rotating shaft 52 may be disposed adjacent to the upper side of the first rotating shaft 4.

[0022] A portion of the liner L1 is wound around the winding body 2 before the rubber member M1 is wound. As a result, by rotating the winding body 2, the liner L1 wound around the liner supplier 51 is wound onto the winding body 2. In other words, the liner supplier 51 rotates in conjunction with the winding body 2 to supply the liner L1.

[0023] In this embodiment, a plurality of guide rollers 53 are arranged above the liner supplier 51. The number and positions of the guide rollers 53 are appropriately determined depending on the positions of the winding body 2 and the liner supplier 51, the rubber member supply position P1 (described later), etc. Note that, for example, the liner supplier 5 may be configured without the guide rollers 53.

[0024] The rubber material winding device 1 includes a liner tension adjusting unit 6 that relaxes the tension of the liner L1 as the winding length of the rubber material M1 increases. In this embodiment, the liner tension adjusting unit 6 includes a brake device 61 for adjusting the tension of the liner L1, and a second connecting shaft 62 to which the brake device 61 is attached and which is connectable to the second rotating shaft 52, but is not limited to this. For example, the brake device 61 may be attached directly to the second rotating shaft 52.

[0025] The second connecting shaft 62 is a rotating shaft extending in the axial direction SD1. The second connecting shaft 62 includes a second connecting portion 621 that can be connected to the second rotating shaft 52. The second connecting portion 621 is disposed at the end of the second connecting shaft 62 on the second rotating shaft 52 side. In this embodiment, the second connecting portion 621 includes a plurality of second protrusions 621a that protrude toward the second rotating shaft 52 side.

[0026] The second rotating shaft 52 includes a second connected portion 521 connected to the second connecting portion 621. In this embodiment, the second connected portion 521 is formed in a disk shape and is arranged at the end of the second rotating shaft 52 on the second connecting portion 621 side. The second connected portion 521 includes a second fitting hole 521a into which the second protrusion 621a can be fitted. The second connecting portion 621 is connected to the second connected portion 521 by fitting the second protrusion 621a into the second fitting hole 521a. Note that the connection structure between the second connecting portion 621 and the second connected portion 521 is not limited to the above.

[0027] In this embodiment, the brake device 61 is an air caliper brake, and the brake disc 611 is attached to the second connecting shaft 62, but is not limited to this. For example, the brake device 61 may be a hydraulic brake or the like.

[0028] By providing the brake device 61, the rotational resistance of the second rotating shaft 52 changes due to the braking pressure of the brake device 61, and the tension of the liner L1 wound around the winding body 2 changes. Specifically, the tension of the liner L1 increases by increasing the braking pressure of the brake device 61, and decreases by decreasing the braking pressure of the brake device 61. This allows the liner tension adjustment unit 6 to adjust the tension of the liner L1.

[0029] The liner tension adjusting unit 6 may be configured to include, for example, only the brake device 61, and the brake device 61 may apply a brake pressure to the second flange 512 of the liner supplier 51.

[0030] The rubber material winding device 1 includes a first support base 7 that supports at least the winding body 2 and the liner supplier 51. The first support base 7 includes a substantially rectangular base portion 71 and a pair of support portions 72, 72 that are erected on the base portion 71. Note that the support portions 72 are not shown in FIG. 2.

[0031] The support part 72 includes a first bearing part 721 that rotatably supports the first rotating shaft 4, a second bearing part 722 that rotatably supports the second rotating shaft 52, and a rotating shaft fixing part (not shown) (for example, a clutch) that fixes the first rotating shaft 4 and the second rotating shaft 52 so that they do not rotate. In this embodiment, the support part 72 includes a roller receiving part (not shown) that rotatably supports the guide roller 53.

[0032] In this embodiment, the first support base 7 includes a plurality of casters 73 for transporting the rubber material M1 wound around the winding body 2, and a pull handle (not shown) for pulling the first support base 7 with a transport vehicle, but is not limited to this. For example, the first support base 7 may be configured without the casters 73. The casters 73 are arranged at the four corners of the lower side of the base portion 71.

[0033] The drive unit 3 and the liner tension adjustment unit 6 are supported by a second support base X3 fixed to the floor X2. The second support base X3 includes a third bearing X31 that rotatably supports the first connecting shaft 33 and a fourth bearing X32 that rotatably supports the second connecting shaft 62. Note that, for example, the drive unit 3 and the liner tension adjustment unit 6 may be supported by the first support base 7. The second support base X3 includes a support base fixing portion (not shown) for fixing the first support base 7. The support base fixing portion fixes the first support base 7 by clamping the base portion 71 and / or the support portion 72.

[0034] The rubber material M1 supplied to the rubber material winding device 1 is supplied from a rubber material supplying device X4. The rubber material supplying device X4 includes an extrusion device X41 that continuously extrudes the rubber material M1 into a plate shape, a conveying device X42 that supplies the rubber material M1 to the rubber material winding device 1, and a cutting unit (not shown) that cuts the rubber material M1 to a set winding length. The cutting unit is disposed on the conveying device X42. Note that the rubber material supplying device X4 is not shown in FIG. 1.

[0035] The extrusion device X41 continuously extrudes the plate-shaped rubber material M1 from a die X41a toward the conveyance device X42. The conveyance device X42 is, for example, a conveyor, and conveys the rubber material M1 extruded from the extrusion device X41. A rubber material supply position P1, which supplies the rubber material M1 to the rubber material winding device 1, is disposed at the downstream end of the conveyance device X42.

[0036] In this embodiment, the rubber material supply position P1 is located above between the winding body 2 and the liner supplier 51. According to this configuration, the rubber material M1 is supplied onto the liner L1 from above between the winding body 2 and the liner supplier 51, and is taken up onto the winding body 2 together with the liner L1. Note that the rubber material supply position P1 is not limited to the above position, and may be set appropriately depending on the size of the facility X1 in which the rubber material winding device 1 is installed, etc.

[0037] From the viewpoint of suppressing deformation of the rubber material M1, it is preferable that the conveying device X42 controls the conveying speed in accordance with the winding speed of the rubber material M1 on the winding body 2. Furthermore, from the viewpoint of suppressing deformation of the rubber material M1 extruded from the extrusion device X41, it is preferable that the speed fluctuation of the conveying speed be within 10%.

[0038] The rubber material winding device 1 includes a rubber material tension adjusting unit 8 for adjusting the tension of the rubber material M1 supplied from the rubber material supplying device X4. The rubber material tension adjusting unit 8 is disposed between the rubber material supply position P1 and the winding body 2. In this embodiment, the rubber material tension adjusting unit 8 is disposed at a position where the rubber material M1 can be merged with the liner L1 before the rubber material M1 is wound onto the winding body 2. Note that the position of the rubber material tension adjusting unit 8 is not limited to the above position and can be set as appropriate depending on the rubber material supply position P1, etc.

[0039] In this embodiment, the rubber member tension adjustment unit 8 is a dancer roller that urges the rubber member M1 toward the liner supplier 51 by an urging member (not shown), such as a leaf spring or a coil spring. When the tension of the rubber member M1 is large, the dancer roller moves in the opposite direction to the urging direction to reduce the tension of the rubber member M1, and when the tension of the rubber member M1 is small, the dancer roller moves in the urging direction to increase the tension of the rubber member M1. In this way, the tension of the rubber member M1 can be adjusted by the rubber member tension adjustment unit 8. Note that the rubber member tension adjustment unit 8 is not limited to a dancer roller, and other adjustment structures may be used.

[0040] In this embodiment, the rubber member tension adjusting unit 8 is supported by a support unit (not shown) together with the transport device X42 and the like, but is not limited to this. For example, the rubber member tension adjusting unit 8 may be supported by the first support base 7.

[0041] The rubber material winding device 1 includes a control unit (not shown) that controls the drive unit 3 and the liner tension adjustment unit 6. The control unit preferably controls the rotation speed of the drive motor 31 so that it slows as the winding length of the rubber material M1 increases. As the winding of the rubber material M1 progresses, the thickness of the rubber material M1 wound around the winding body 2 increases, and the circumferential speed of the winding body 2, i.e., the winding speed of the rubber material M1, increases. This is because there is a risk that the tension of the rubber material M1 will increase and the rubber material M1 will be deformed. It is more preferable that the control unit controls the rotation speed of the drive motor 31 so that the winding speed of the rubber material M1 will be constant.

[0042] The control unit calculates the winding length of the rubber member M1 from the diameter D1 of the first cylindrical portion 21 and the rotation speed of the drive motor 31, and stops the drive motor 31 when the set winding length of the rubber member M1 has been wound by the winding body 2.

[0043] The control unit controls the liner tension adjusting unit 6 to loosen the tension of the liner L1 as the winding length of the rubber member M1 increases. Specifically, the control unit reduces the brake pressure of the brake device 61 as the winding length of the rubber member M1 increases.

[0044] In this embodiment, as shown in FIG. 3, the control unit reduces the brake pressure of the brake device 61 in a stepped manner (for example, dividing the period from the start of winding to the end of winding into 10 stages). This makes it easier for the control unit to control the brake device 61. As shown in FIG. 2, the amount of reduction in the brake pressure is set appropriately depending on the set winding length of the rubber member M1, the diameter D1 of the first tubular portion 21 of the winding body 2, etc. Note that the control unit is not limited to the above control, and may, for example, reduce the brake pressure of the brake device 61 linearly.

[0045] Next, a method for winding up the rubber member will be described with reference to FIGS.

[0046] 1, the first support base 7, on which the winding body 2 and the liner supplier 51 are supported, is moved to the rubber material winding position P2. Next, the first rotating shaft 4 is connected to the first connecting shaft 33 to connect the winding body 2 to the drive unit 3, and the second rotating shaft 52 is connected to the second connecting shaft 62 to connect the liner supplier 51 to the liner tension adjusting unit 6. Then, the base portion 71 and / or the support portion 72 of the first support base 7 are fixed by the support base fixing portion of the second support base X3, and the fixing of the first rotating shaft 4 and the second rotating shaft 52 by the rotating shaft fixing portion is released.

[0047] Next, the rubber material M1 is continuously extruded by the extrusion device X41, and the extruded rubber material M1 is transported by the transport device X42 and supplied to the rubber material winding device 1 from the rubber material supply position P1. Then, the drive unit 3 is driven to rotate the winding body 2, and the liner L1 supplied from the liner supply unit 5 is wound onto the winding body 2. The rubber material M1 is supplied from above (rubber material supply position P1) between the winding body 2 and the liner supply unit 5. Then, the rubber material M1 merges with the liner L1 before being wound onto the winding body 2 by the rubber material tension adjustment unit 8, and is wound onto the winding body 2 together with the liner L1. At this time, the tension of the rubber material M1 is adjusted by the rubber material tension adjustment unit 8.

[0048] The tension of the liner L1 being wound by the winding body 2 is adjusted by the liner tension adjusting unit 6 so that the tension decreases as the wound length of the rubber material M1 increases. The rubber material M1 extruded from the extrusion device X41 is cut to a set winding length by a cutting unit.

[0049] Thereafter, when the winding length of the rubber material M1 wound by the winding body 2 reaches the set winding length, the drive unit 3 is stopped and the rotation of the winding body 2 is stopped. This makes it possible to wind the rubber material M1 by the winding body 2 while suppressing deformation of the rubber material M1.

[0050] As described above in the above embodiment, it is preferable that the rubber material winding device 1 is configured to include a winding body 2 for winding the continuously supplied plate-shaped rubber material M1, a liner supply section 5 for supplying the liner L1 to be wound onto the winding body 2 together with the rubber material M1, and a liner tension adjustment section 6 for loosening the tension of the liner L1 as the winding length of the rubber material M1 increases.

[0051] Furthermore, as in the above embodiment, in the rubber material winding method in which the liner L1 is wound by the winding body 2 together with the continuously supplied plate-shaped rubber material M1, it is preferable to control the tension of the liner L1 to be relaxed as the winding length of the rubber material M1 increases.

[0052] According to such a configuration and method, the back tension of the liner L1, which increases as the winding length of the rubber member M1 increases, can be suppressed by loosening the tension of the liner L1 with the liner tension adjusting unit 6. This makes it possible to suppress deformation of the rubber member M1 due to tightening of the liner L1.

[0053] As in the above embodiment, in the rubber material winding device 1, it is preferable that the rubber material M1 is supplied between the winding body 2 and the liner supply section 5 from above.

[0054] As in the above embodiment, the rubber material winding method is preferably a method in which the rubber material M1 is supplied from above between the winding body 2 and the liner supply section 5 that supplies the liner L1.

[0055] According to such a configuration and method, by stacking the conveying device X42 of the rubber material supplying device X4 above the rubber material winding device 1, the size of the equipment X1 for winding the rubber material M1 around the winding body 2 can be reduced.

[0056] Furthermore, as in the above embodiment, the rubber material winding device 1 is preferably configured to include a rubber material tension adjusting unit 8 for adjusting the tension of the rubber material M1, and the rubber material tension adjusting unit 8 merges the rubber material M1 with the liner L1 before the rubber material M1 is wound onto the winding body 2.

[0057] Furthermore, as in the above embodiment, the rubber material winding method is preferably such that the rubber material tension adjusting unit 8 for adjusting the tension of the rubber material M1 merges the rubber material M1 with the liner L1 before the rubber material M1 is wound onto the winding body 2.

[0058] Such a configuration and method can prevent the rubber member M1 from being directly wound onto the winding body 2. This can prevent an increase in tension of the rubber member M1 due to direct winding onto the winding body 2, and suppress deformation of the rubber member M1.

[0059] The rubber material winding device 1 and the rubber material winding method are not limited to the configurations of the above-described embodiments, and are not limited to the above-described effects. Furthermore, the rubber material winding device 1 and the rubber material winding method can, of course, be modified in various ways without departing from the spirit of the present invention. For example, it is of course possible to arbitrarily select one or more of the configurations and methods according to the various modified examples described below and employ them in the configurations and methods according to the above-described embodiments.

[0060] In this embodiment, the liner tension adjusting unit 6 is configured to include a brake device 61 for adjusting the tension of the liner L1, but is not limited to this configuration. For example, the liner tension adjusting unit 6 may be configured to include a drive motor for rotating the liner supplier 51 independently of the winding body 2.

[0061] In this configuration, the control unit controls the drive motor 31 of the drive unit 3 and the drive motor of the liner tension adjustment unit 6 to adjust the tension of the liner L1 by creating a difference in rotation speed between the winding body 2 and the liner supply body 51. Specifically, the tension of the liner L1 can be relaxed by making the rotation speed of the liner supply body 51 faster than the rotation speed of the winding body 2. The tension of the liner L1 can be increased by making the rotation speed of the liner supply body 51 slower than the rotation speed of the winding body 2. [Explanation of symbols]

[0062] 1...rubber material winding device, 2...winding body, 21...first cylindrical portion, 22...first flange, 3...drive portion, 31...drive motor, 32...reduction gear, 33...first connecting shaft, 331...first connecting portion, 331a...first protruding portion, 4...first rotating shaft, 41...first connected portion, 411...first fitting hole, 5...liner supply portion, 51...liner supply body, 511...second cylindrical portion, 512...second flange, 52...second rotating shaft, 521...second connected portion, 521a...second fitting hole, 53...guide roller, 6...liner tension adjustment portion, 61...brake device, 62... Second connecting shaft, 611...brake disc, 621...second connecting portion, 621a...second protrusion, 7...first support base, 71...base portion, 72...support portion, 721...first bearing portion, 722...second bearing portion, 73...caster, 8...rubber material tension adjustment portion, M1...rubber material, P1...rubber material supply position, P2...rubber material winding position, L1...liner, X1...equipment, X2...floor, X3...second support base, X31...third bearing portion, X32...fourth bearing portion, X4...rubber material supply device, X41...extrusion device, X41a...mouthpiece, X42...conveyor device

Claims

1. a winding body for winding up the continuously supplied plate-shaped rubber member; a liner supply unit that supplies a liner to be wound onto the winding body together with the rubber member; a liner tension adjusting unit for loosening the tension of the liner as the winding length of the rubber member increases; a rubber member tension adjusting unit for adjusting the tension of the rubber member, The rubber member tension adjusting section causes the rubber member to join the liner before the rubber member is wound onto the winding body.

2. A method for winding a rubber member in which a liner is wound on a winding body together with a continuously supplied plate-shaped rubber member, comprising: controlling the tension of the liner to be relaxed as the winding length of the rubber member increases; A rubber member winding method, wherein a rubber member tension adjusting section for adjusting the tension of the rubber member causes the rubber member to join the liner before the rubber member is wound onto the winding body.

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