Processing device for tire tread

Abstract

To provide a processing device for tire tread capable of forming a sipe on a surface of the tire tread.SOLUTION: A processing device for a tire tread according to the present invention forms a sipe on a surface of the tire tread, where the processing device includes a cutting part that forms the sipe and a support part that supports the tire, the cutting part being movable so to reciprocate in a tire radial direction of the tire supported by the support part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tire tread processing device. [Background technology]

[0002] 2. Description of the Related Art As a technique for improving the wear resistance required for tires, it is known to provide sipes on the tread surface of new tires or retreaded tires (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 60-240507 Summary of the Invention [Problem to be solved by the invention]

[0004] As a result, there is a need for an apparatus for providing sipes in the tread surface of a vulcanized tire.

[0005] SUMMARY OF THE PRESENT DISCLOSURE OF THE PRESENT DISCLOSURE An object of the present invention is to provide a tire tread processing device capable of forming sipes on the tire tread surface. [Means for solving the problem]

[0006] The gist and configuration of the present invention are as follows. (1) A tire tread processing device for forming sipes on a tire tread surface, comprising: A blade portion that forms the sipe; a support portion that supports the tire, A tire tread processing device, characterized in that the blade portion is movable back and forth in a radial direction of the tire supported by the support portion.

[0007] (2) The processing apparatus according to (1), wherein the support portion rotatably supports the tire.

[0008] (3) The processing device according to (1) or (2), wherein the blade portion is movable in a tire width direction of the tire supported by the support portion.

[0009] (4) The processing device according to any one of (1) to (3) above, which has a plurality of the blades.

[0010] (5) The processing device described in (4), wherein the plurality of blade portions are arranged in a tire width direction or a tire circumferential direction of the tire supported by the support portion.

[0011] (6) The processing device according to any one of (1) to (5), wherein an extension length of the blade portion is smaller than a tread width of the tire.

[0012] (7) The processing device described in any one of (1) to (6), wherein the blade portion is configured to be rotatable about an axis in the tire radial direction so that an inclination angle of the tire supported by the support portion with respect to the tire width direction is changed. Effect of the Invention

[0013] According to the present invention, it is possible to provide a tire tread processing device capable of forming sipes on a tire tread surface. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic front view showing a tire tread processing device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing a direction perpendicular to the tread surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0016] 1 is a schematic front view showing an apparatus 1 for processing a tread 11 of a tire 10 according to one embodiment of the present invention. The apparatus 1 is an apparatus for processing a tread 11 of a tire 10, which forms sipes on a tread surface 11a of the tire 10. As shown in FIG. 1, the apparatus 1 includes a blade section 2 for forming sipes and a support section 4 for supporting the tire 10.

[0017] In the illustrated example, the blade portion 2 is fixed by the fixing portion 3. In this example, a part of the blade portion 2 protrudes from the fixing portion 3, and the protruding part forms a sipe, while the other part is embedded in a recess of the fixing portion 3.

[0018] Since the blade portion 2 forms the sipes, its width (length in the depth direction in FIG. 1) can be set to a width corresponding to the sipe width of the sipe to be formed.

[0019] The extension length of the blade portion 2 (the length in the left-right direction in FIG. 1) corresponds to the extension length of the sipe, but as shown in the figure, it can be made larger than the tread width of the tire 10, in which case sipes can be formed simultaneously in multiple land portions, improving processing efficiency. On the other hand, it is also preferable that the extension length of the blade portion 2 is made smaller than the tread width of the tire 10, in which case, for example, it is advantageous when forming sipes for each land portion of the tire 10. For example, the pitch length in the tire circumferential direction with respect to the tire width direction can be made different for each land portion.

[0020] Moreover, the blade portion 2 is slidable in a protruding direction (a direction perpendicular to the width and extension direction of the blade portion 2) so that the protruding height from the fixed portion 3 can be changed. Such sliding can be achieved by any known sliding portion 91. Thereby, for example, when the sipe depth of the sipe to be formed is to be deepened, the blade portion 2 can slide so that the protruding height increases.

[0021] Here, the blade portion 2 is movable so as to reciprocate in the tire radial direction (in other words, in a direction perpendicular to a plane parallel to the tire axis passing through the tread surface 11a forming the sipes, as shown in Fig. 2). As one example, since the fixing portion 3 is movable so as to reciprocate in the tire radial direction, the blade portion 2 fixed by the fixing portion 3 can also be movable so as to reciprocate in the tire radial direction.

[0022] It is preferable that the blade portion 2 is movable in the tire width direction of the tire 10 supported by the support portion 4. This is because, for example, when the extension length of the blade portion 2 is smaller than the tread width of the tire 10, the blade portion 2 can be moved between land portions to form sipes in each land portion. Any known slide portion 92 can be used as a mechanism for moving the fixing portion 3 back and forth in the tire radial direction or a mechanism for moving the fixing portion 3 in the tire width direction.

[0023] The blade portion 2 is preferably configured to be rotatable about an axis in the tire radial direction so that the inclination angle of the tire 10 supported by the support portion 4 with respect to the tire width direction can be changed. This is because the inclination angle of the sipes to be formed with respect to the tire width direction can be changed. This rotation mechanism can be any known rotating portion 93.

[0024] The device 1 may have only one blade portion 2, or may have multiple blade portions 2. When multiple blade portions 2 are provided, sipes can be formed simultaneously at multiple locations on the tread surface 11a, thereby improving processing efficiency.

[0025] The multiple blade portions 2 are preferably aligned in the tire width direction or tire circumferential direction of the tire 10 supported by the support portion 4. This is because sipes are usually arranged in the tire width direction or tire circumferential direction of the tire 10.

[0026] The blade 2 can be any known cutter.

[0027] The fixing portion 3 is preferably made of a material that can withstand external damage caused by the blade portion 2, for example, a metal material.

[0028] In the illustrated example, the support portion 4 is an axle portion. In this example, the tire 10 rotates as the axle portion rotates (for example, by a motor 94 or the like). In addition, the tire 10 can be fixed by stopping the rotation of the tire 10 with a fixing portion (lock mechanism) 95. The operation and effect of the tire tread processing device of this embodiment will be described below.

[0029] In the tire tread processing device 1 of the present embodiment, the blade portion 2 is movable so as to reciprocate in the tire radial direction of the tire 10 supported by the support portion 4. As a result, the blade portion 2 is moved inward in the tire radial direction (the direction in which the blade portion 2 approaches the tire 10) until the protruding height of the blade portion 2 corresponding to the desired sipe depth is dug into the tread 11 from the tread surface 11a, thereby forming the sipe in the tread 11. When the formation is completed, the blade portion 2 is moved outward in the tire radial direction (the direction in which the blade portion 2 moves away from the tire 10) to pull the blade portion 2 out of the tread 11. In this manner, the device 1 of this embodiment can form sipes in the tread surface 11a of the tire 10.

[0030] In this embodiment, the support portion 4 supports the tire 10 so as to be rotatable. Therefore, by rotating the tire 10 and fixing the tire 10 again at the rotated position (by the fixing portion 95), the tire circumferential position of the tread 11 relative to the blade portion 2 and the fixing portion 3 can be moved. Therefore, after forming the sipes as described above, the blade portion 2 is pulled out from the tread 11, the tire 10 is rotated by the desired sipe interval (circumferential interval between the sipes) and fixed, the blade portion 2 is again moved inward in the tire radial direction to form the sipes in the tread 11, and when the formation is completed, the blade portion 2 is moved outward in the tire radial direction to pull out the blade portion 2 from the tread 11. By repeating this, a plurality of sipes can be formed in the circumferential direction on the tread surface 11a of the tire 10. This can also be achieved by fixing the tire 10 by the fixing portion 95 and making the blade portion 2 and the fixing portion 3 movable along the tire circumferential direction.

[0031] When the extension length of the blade portion 2 is greater than or equal to the tread width as in this embodiment, sipes can be formed all over the width of the tread 11 (for example, over a plurality of land portions) at once. On the other hand, when the extension length of the blade portion 2 is smaller than the tread width, it is preferable that the blade portion 2 is movable in the tire width direction of the tire 10 supported by the support portion 4 as described above. Therefore, after forming the sipes as described above, the blade portion 2 is pulled out from the tread 11, moved in the width direction so as to move between land portions, and fixed, and the blade portion 2 is again moved inward in the tire radial direction to form the sipes in the tread 11, and when the formation is completed, the blade portion 2 is moved outward in the tire radial direction to pull out the blade portion 2 from the tread 11. By repeating this, a plurality of sipes can be formed in the width direction on the tread surface 11a of the tire 10.

[0032] It is preferable to have a plurality of blade portions 2, which allows sipes to be formed at a plurality of locations at once. It is preferable that the plurality of blade portions 2 are arranged in the tire width direction or tire circumferential direction of the tire 10 supported by the support portion 4. This is because it allows sipes to be formed at a plurality of locations in the tire width direction or tire circumferential direction at once.

[0033] The extension length of the blade portion 2 is preferably smaller than the tread width of the tire 10. This is because the formation mode of the sipes (for example, the inclination angle with respect to the tire width direction and the pitch interval between the sipes in the tire circumferential direction) can be made different between the land portions.

[0034] The blade portion 2 is preferably configured to be rotatable about an axis in the tire radial direction so that the inclination angle of the tire 10 supported by the support portion 4 with respect to the tire width direction can be changed. This is because the inclination angle of the sipes to be formed with respect to the tire width direction can be changed. The blade portion 2 can be configured to reciprocate in a direction inclined with respect to a plane parallel to the tire axis passing through the tread surface 11a that forms the sipes. In this case, it is preferable that the blade portion 2 is disposed so as to extend along the reciprocating direction.

[0035] Here, the sipes may be pin-shaped sipes (for example, sipes with an opening on the tread surface having a diameter of about several millimeters), and in this case, the blade portion 2 may be a pin-shaped blade.

[0036] When the device 1 has a plurality of blade portions 2 in the tire circumferential direction, the interval between adjacent blade portions 2 in the tire circumferential direction is preferably 30° or more around the tire axis. This is because, when a sipe is formed by one blade portion 2, the blade portions 2 are prevented from affecting each other in terms of deformation of the tread surface 11a, thereby improving the processing accuracy.

[0037] While the sipes are being formed, the tire 10 is preferably fixed by the fixing portion 95. [Explanation of symbols]

[0038] 1: Tire tread processing equipment, 2: Blade part, 3: Fixed part, 4: Support part, 10: Tires, 11: Tread, 11a: tread surface, 91: Slide section, 92: Slide section, 93: Rotating part, 94: Motor, 95: Fixed part

Claims

1. A tire tread processing device for forming sipes on a tire tread surface, comprising: A blade portion that forms the sipe; a support portion that supports the tire, A tire tread processing device, characterized in that the blade portion is movable back and forth in a radial direction of the tire supported by the support portion.

2. The processing device according to claim 1 , wherein the support portion rotatably supports the tire.

3. The processing device according to claim 1 or 2, wherein the blade portion is movable in a tire width direction of the tire supported by the support portion.

4. The processing device according to claim 1 or 2, comprising a plurality of the blade portions.

5. The processing device according to claim 4 , wherein the plurality of blade portions are arranged in a tire width direction or a tire circumferential direction of the tire supported by the support portion.

6. The processing device according to claim 1 or 2, wherein an extension length of the blade portion is smaller than a tread width of the tire.

7. 3. The processing device according to claim 1, wherein the blade portion is configured to be rotatable about an axis in a radial direction of the tire such that an inclination angle of the blade portion with respect to a width direction of the tire supported by the support portion is changed.

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