JP2018015829A - Tire polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To polish the whole area of an inner peripheral surface of a tire without requiring a labor.SOLUTION: A tire polishing device includes a holding jig 2 for holding the tire T rotatably, a polishing tool 3 capable of polishing at least a half part in the tire axial direction leaving a residue y, on an inner peripheral surface TS of the tire T held by the holding jig 2, and an inversion jig 4 capable of inverting the tire T as much as 180 degrees in order to polish the residue y.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a polishing apparatus that is suitable for manufacturing a sealant tire, for example, and can efficiently polish the inner peripheral surface of a tire over a wide range.

  In recent years, a sealant tire having a sealant layer on the inner peripheral surface of a tire is known as a pneumatic tire having a puncture prevention function. In this sealant tire, the hole formed at the time of puncture is automatically closed by the sealant agent, so that air escape can be prevented.

  The sealant layer is formed, for example, by adhering a sealant agent discharged in a string form from a twin-screw kneading extruder to the inner peripheral surface of a rotating tire in a spiral and tightly wound manner. However, since the release agent and oil are attached to the inner peripheral surface of the tire after vulcanization, the sealant agent cannot be sufficiently adhered (adhered).

  Therefore, Patent Document 1 below proposes a polishing apparatus that can remove a release agent and oil by polishing an inner peripheral surface of a tire. As shown in FIG. 7A, this device includes, for example, a disk-shaped rotating brush a and an insertion angle changing mechanism (not shown) that can change the insertion angle α of the rotating brush a. Thereby, since the rotating brush a can be put to the tread end of one side (insertion side), the width | variety of a grinding | polishing area | region can be increased.

  However, as shown in FIG. 7B, since the holding portion b of the rotating brush a comes into contact with the tire t (particularly the bead portion) with respect to the other side (non-insertion side), the rotating brush a The tire cannot reach the inner periphery of the tire. For this reason, a remaining polishing portion y is generated on the other side, which causes a problem that the entire inner peripheral surface of the tire cannot be polished.

  In order to polish the remaining polishing portion y, it is conceivable that the tire is lifted by an operator and inverted 180 degrees, but in this case, a lot of labor is required.

JP, 2006-078232, A

  Then, this invention makes it a subject to provide the tire grinding | polishing apparatus which can grind | polish the inner peripheral surface whole area of a tire, without requiring labor based on providing the inversion tool which can invert a tire 180 degree | times. .

The present invention provides a holder for rotatably holding a tire;
Of the inner peripheral surface of the tire held by the holder, a polishing tool capable of polishing at least half of the tire axial direction leaving the remainder,
In order to polish the remaining portion of the inner peripheral surface of the tire with the polishing tool, the tire has a reversing tool capable of reversing the tire by 180 degrees.

  In the tire polishing apparatus according to the present invention, the reversing tool includes elevating means that can raise and lower the tire held by the holding tool with respect to the holding tool, and a reversing machine that reverses the tire in the raised state.

  In the tire polishing apparatus according to the present invention, the elevating means supports an engaging means having an engaging claw that can be engaged with and disengaged from a bead hole of the tire, and supports the engaging means to be raised and lowered via an elevator. Including lifting body

  In the tire polishing apparatus according to the present invention, the holding tool includes a tire holding unit having a pair of holding rollers for holding the tire across the tire, and a pressing unit having a pressing roller for pressing the held tire against the holding roller from above. It is preferable that the pressing means is supported by the elevating body so as to be movable up and down via an elevator.

  The tire polishing apparatus of the present invention is configured as described above. Therefore, after polishing at least a half portion in the tire axial direction of the inner peripheral surface of the tire with the polishing tool, leaving the remaining part, the tire can be inverted 180 degrees with the reverse tool. As a result, the remaining portion that remains as a polishing residue can be polished by the polishing tool, and the entire inner peripheral surface of the tire can be polished without requiring labor.

1 is a side view conceptually showing one embodiment of a tire polishing apparatus of the present invention. It is a front view which abbreviate | omits a grinding | polishing tool and shows a tire polisher. It is a side view which expands and shows the principal part of an abrasive | polishing tool. It is a perspective view which shows notionally the principal part of an inversion tool. (A) and (B) are the schematic side view and the schematic plan view which show inversion of the tire by the inversion tool. It is a conceptual diagram which shows operation | movement of an inversion tool. (A), (B) is sectional drawing explaining the grinding | polishing state by the conventional tire grinding | polishing apparatus.

Hereinafter, embodiments of the present invention will be described in detail.
As shown in FIGS. 1 and 2, the tire polishing apparatus 1 of the present embodiment polishes a holder 2 that rotatably holds a tire T and an inner peripheral surface Ts of the tire T that is held by the holder 2. And a reversing tool 4 capable of reversing the tire T by 180 degrees.

  The holder 2 has a tire holding means 5 having a pair of holding rollers 5A for holding the tire T across the tire T, and a pressing means 6 having a pressing roller 6A for pressing the held tire T against the holding roller 5A from above. Including.

  The pair of holding rollers 5A are pivotally supported by the main frame 7 in parallel and horizontally. One holding roller 5A is connected to a motor (illustrated) that is attached to the main frame 7. Therefore, the tire holding means 5 can hold the tire T in an upright state across the holding rollers 5A, and the motor. Thus, the tire T can be driven to rotate.

  The main frame 7 of this example is composed of a vertically long rectangular parallelepiped frame body connected by four vertical frame members 7c passing through each corner, for example, between an upper frame portion 7a and a lower frame portion 7b of a rectangular frame shape, The tire T can be taken in and out from the gap between the adjacent vertical frame members 7c and 7c. The main frame 7 includes a middle frame portion 7m disposed between the upper frame portion 7a and the lower frame portion 7b, and the pair of holding rollers 5A are supported on the middle frame portion 7m.

  As shown in FIG. 4, the pressing means 6 includes a pair of pressing rollers 6 </ b> A that are pivotally supported in parallel and horizontally with a roller holder 10. The roller holder 10 is supported by the elevating body 11 through an elevator 12 so as to be movable up and down. That is, the roller holder 10 (pressing means 6) can be moved up and down with respect to the lifting body 11.

  As shown in FIG. 2, the elevating body 11 is supported, for example, on a subframe 13 provided adjacent to the main frame 7 so as to be capable of elevating. A guide rail L <b> 1 extending vertically is arranged on the side surface of the sub frame 13.

  In this example, the elevating body 11 is formed of a substantially L-shaped frame, and includes a base portion 11A guided by the guide rail L1 and a horizontal arm portion 11B extending from the upper end to the main frame 7 side. The distal end portion 11E of the arm portion 11B reaches the upper portion of the tire T through the gap between the vertical frame members 7c and 7c. The elevating body 11 is connected to a driving means (not shown) having, for example, a ball screw mechanism, and includes a raised position PU at which the pressing means 6 can stand by above the tire T, and a pressing roller 6A of the pressing means 6. The tire T can be freely moved up and down between the lowered position PL where the tire T can be pressed.

  As shown in FIG. 4, the elevator 12 is a cylinder with a guide in this example, and is attached to the distal end portion 11 </ b> E of the elevator 11 via a reversing machine 14. As the reversing machine 14, for example, a rotary actuator such as a vane type or a rack and pinion type can be suitably employed. The elevator 12 is attached to the lower end of the output shaft 14 j of the reversing machine 14 via a mounting plate 15. The pressing means 6 of this example is attached to the lower end of the rod 12A of the elevator 12 via, for example, a columnar relay member 16 extending downward.

  Next, the reversing tool 4 comprises lifting means 20 that can lift and lower the tire T held by the holding tool 2 with respect to the holding tool 2, and the reversing machine 14 that reverses the tire T in the raised state. Yeah.

  The lifting / lowering means 20 includes a pair of locking means 23 having a locking claw 22 detachably engageable with the bead hole Th of the tire T, and supports each locking means 23 to be lifted / lowered via the elevator 12. The elevating body 11.

  In this example, each locking means 23 is attached to an arm portion 24 extending from the relay member 16 to both sides in the tire axial direction. Therefore, the locking means 23 can be moved up and down with respect to the lifting body 11. Further, since the locking means 23 and the pressing means 6 are supported by the lifting body 11 through the same elevator 12, the locking means 23 and the pressing means 6 can be moved up and down integrally.

  The locking means 23 of the present example includes a second elevator 25 that is, for example, a cylinder with a guide that is attached to the tip of the arm portion 24, and a rotating machine 26 that is, for example, a rotary actuator that is attached to the lower end of the rod 25A. At the lower end of the output shaft 26A of the rotating machine 26, the locking claw 22 is approximately 90 between a first state Y1 facing inward in the tire axial direction and a second state Y2 in a direction orthogonal to the tire axial direction. It is supported so that it can pivot horizontally at an angle of degrees. Therefore, the locking claw 22 can lock the bead hole Th of the tire T in the first state Y1, and the locking is released in the second state Y2. Further, since the locking means 23 includes the second elevator 25, the tire T can be sandwiched between the locking claw 22 and the pressing means 6 by the rising of the locking claw 22 by the second elevator 25. The holding can be released by the lowering of the claw 22.

  5A and 5B show the operation of the reversing tool 4. In the reversing tool 4 of the present example, the tire T sandwiched between the pressing roller 6A and the locking claw 22 is lifted from the holding tool 2 by the raising and lowering body 11, and then rotated by the reversing machine 14 to rotate the tire center. 180 degrees around a vertical axis J passing through.

  Next, as shown in FIG. 3, the polishing tool 3 includes a polishing means 30 having a disc-shaped brush 30A at a front end, a vertical movement means 31 for moving the polishing means 30 up and down, and the polishing means 30. And a forward / backward moving means 32 for moving the tire axially back and forth.

  The polishing means 30 includes the brush 30A and a brush rotating machine 30B that holds the brush 30A so as to be rotatable about its axis. As the brush 30A, for example, a metal or synthetic resin filament planted around a cylindrical core can be used. For example, a motor or the like can be used as the brush rotating machine 30B.

  The brush rotating machine 30B is supported by the holder 30C so as to be tiltable up and down around an axis i in a direction orthogonal to the tire axial direction. Thereby, the insertion angle α of the brush 30A can be freely changed. The insertion angle α is defined by the angle between the axis of the brush 30A and the tire axis. In addition to manual operation, the insertion angle α can be automatically changed by a mechanism such as a motor, a jack, an encoder, or an inverter.

  The vertical moving means 31 includes a first moving base 36 that is guided so as to be vertically movable by a guide rail L2 provided on the frame 35, for example. The first moving table 36 is connected to a driving means (not shown) having, for example, a ball screw mechanism so that the brush 30A can be inserted through the bead hole Th, and the brush 30A can polish the inner peripheral surface TS. It can freely move up and down between different height positions. A guide rail L3 extending in the tire axial direction is disposed at the upper end of the first moving table 36.

  The front-rear moving means 32 includes a second moving table 37 that is guided by the guide rail L3 so as to be movable in the tire axial direction. The second moving table 37 is connected to a driving means (not shown) having, for example, a ball screw mechanism, and freely moves between a forward position where the brush 30A is inside the tire lumen and a retracted position outside the tire lumen. Can move back and forth.

  Then, the furnace 30C of the polishing means 30 is supported on the second moving table 37.

  Such a polishing tool 3 can polish at least a half portion in the tire axial direction of the inner peripheral surface TS of the tire T by leaving the remaining portion y by changing the insertion angle α. The half portion means a range from one outer end of the inner peripheral surface TS in the tire axial direction to the tire equator position. Then, the remaining portion y, which is a polishing residue, can be polished by the polishing tool 3 by the reversal of the tire T by the reversing tool 4.

  FIG. 6 shows the operation of the reversing tool 4. First, in state (1), the tire T is carried in. In this state (1), the elevating body 11 stands by at the raised position PU, and the pressing means 6 and the locking means 23 are raised by the elevator 12. The locking claw 22 of the locking means 23 is raised by the second elevator 25 and is in the second state Y2 by the rotating machine 26.

  This state (2) is obtained after the tire is loaded. In the state (2), the elevating body 11 is lowered to the lowered position PL, and the pressing means 6 and the locking means 23 are lowered by the elevator 12. As a result, the tire T can be pressed against the holding roller 5A, and the tire T can be driven to rotate. Further, in this state (2), at least a half portion in the tire axial direction of the inner peripheral surface TS of the tire is polished leaving a remaining portion y.

  After polishing, the state (3) is obtained. In this state (3), the locking claw 22 is lowered by the second elevator 25 and turned by the rotating machine 26 to be in the first state Y1. Thereafter, as shown in the state (4), the locking claw 22 is raised by the second elevator 25, and the tire T is pinched between the locking claw 22 and the pressing roller 6A.

  As shown in the state (5), the elevating body 11 rises to the ascending position PU in the sandwiched state, and then the tire T is inverted 180 degrees by the reversing machine 14 as shown in the state (6). Let Thereafter, the state (5) → the state (4) → the state (3) → the state (2) is returned, and the remaining portion y is polished.

  The reversing tool 4 may be, for example, a reversible horizontal turntable (not shown) supported by the middle frame portion 7m or the like, and the tire holding means 5 is supported on this turntable. . In this case, there is no need to lift the tire. Therefore, the lifting means 20 that can lift and lower the tire T and the reversing device 14 that reverses the tire in the raised state can be eliminated.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 1 Tire grinding | polishing apparatus 2 Holding tool 3 Polishing tool 4 Inversion tool 5 Tire holding means 5A Holding roller 6 Pressing means 6A Pressing roller 11 Lifting body 14 Reverse machine 20 Lifting means 22 Locking claw 23 Locking means T Tire Th In bead hole TS Circumference y remaining

Claims (4)

A holder for rotatably holding the tire;
Of the inner peripheral surface of the tire held by the holder, a polishing tool capable of polishing at least half of the tire axial direction leaving the remainder,
A tire polishing apparatus comprising: a reversing tool capable of reversing the tire by 180 degrees in order to polish the remaining portion of the inner peripheral surface of the tire with the polishing tool.   2. The tire according to claim 1, wherein the reversing tool includes lifting / lowering means that can lift and lower the tire held by the holding tool with respect to the holding tool, and a reversing machine that reverses the tire in the raised state. Polishing equipment.   The elevating means includes an engaging means having an engaging claw that can be engaged with and disengaged from a bead hole of a tire, and an elevating body that supports the engaging means so as to be raised and lowered via an elevator. The tire polishing apparatus according to claim 2.   The holding tool includes tire holding means having a pair of holding rollers for holding the tire across the tire, and pressing means having a pressing roller for pressing the held tire against the holding roller from above, the pressing means being The tire polishing apparatus according to any one of claims 1 to 3, wherein the tire polishing apparatus is supported by the elevating body so as to be movable up and down via the elevator.

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