JP2018075726A - A tire conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the tire conveyor device which can alleviate interference between a holding portion that holds the periphery of an upper bead portion of a green tire and a vulcanized bladder, and which can extend service life of the vulcanized bladder, when the green tire is set in a vulcanizer.SOLUTION: In the tire conveyor device, a holding section 3 extending downward from a body frame 2 is formed in an arc shape extending downward and curved outward with respect to an annular bead portion Bd on an upper side of the laterally tilted green tire G, a periphery of an upper annular bead part Bd is held by the holding section 3 from the inside of the tire when the holding section 3 is moved to the holding position, and the holding section 3 is moved in the arcuate extending direction to release the holding by the holding section 3 with respect to the upper annular bead portion Bd of the green tire G held from the inside by an inflated vulcanization bladder 10 when the holding section 3 is moved to a releasing position.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a tire conveying device, and more particularly, when a green tire is set in a vulcanizing device, the vulcanizing bladder is relaxed while reducing interference between a holding portion that holds the periphery of the upper bead portion of the green tire and the vulcanizing bladder. The present invention relates to a tire conveying device capable of extending the useful life of a sulfur bladder.

  In order to manufacture a tire, a green tire formed of unvulcanized rubber or the like is vulcanized with a vulcanizer. When this green tire is set in a vulcanizing device, generally, a conveying device having a claw-like portion that holds the periphery of the upper bead portion of a horizontally laid green tire is used (see, for example, Patent Document 1). .

  The green tire in which the periphery of the upper bead portion is held by the claw-like portion is placed on a lower mold installed in the vulcanizing apparatus. Next, after the vulcanizing bladder is inflated to some extent to hold the green tire, the nail-like portion is separated from the green tire by moving upward with the nail-like portion moved inward in the tire radial direction. In the process of separating the claw-shaped portion from the green tire, if the vulcanization bladder is left as it is, it will strongly interfere with the moving claw-shaped portion. Therefore, interference between the vulcanization bladder and the claw-like portion is avoided by positioning the upper clamp portion holding the upper end portion of the vulcanization bladder slightly below the predetermined position. Thereafter, the mold is closed and the vulcanization bladder is further expanded to vulcanize the green tire for a predetermined time.

  The upper clamp part that has been moved slightly downward during vulcanization is set at a predetermined position. Therefore, the periphery of the upper end portion of the vulcanization bladder is forcibly moved in a state where the bladder internal pressure is high, and local compression deformation occurs. As a result, the periphery of the upper end of the vulcanization bladder is more easily damaged than the periphery of the lower end, which contributes to a shortened life of the vulcanization bladder.

JP 60-264209 A

  An object of the present invention is to extend the useful life of a vulcanization bladder while mitigating interference between a holding portion that holds the periphery of the upper bead portion of the green tire and a vulcanization bladder when the green tire is set in a vulcanizer. An object of the present invention is to provide a tire transport device that can perform the above-described process.

  In order to achieve the above object, a tire transport device according to the present invention includes a holding portion extending downward from a main body frame, the holding portion being set to be movable between a holding position and a release position, and the holding In the position, the periphery of the upper circular bead portion of the green tire in a laid-down state is held by the holding portion from the inner side of the tire, and in the release position, the upper side of the green tire is held from the inner side by an expanding vulcanizing bladder In the tire conveyance device configured to release the holding by the holding portion with respect to the periphery of the annular bead portion, the holding portion curves downward and extends outward with respect to the upper annular bead portion. And the holding portion moves in the arc extending direction so that the holding position and the release position are Characterized in that the structure to move to and.

  According to the present invention, the holding portion is formed in an arc shape that is curved and extends toward the outer peripheral side with respect to the annular bead portion on the upper side of the green tire, and is moved in the extending direction of the arc shape. Therefore, the space required for the holding unit to move between the holding position and the release position can be minimized. Therefore, when the holding part is moved from the holding position to the release position, even if the upper clamp part holding the upper end part of the vulcanizing bladder is in the predetermined position when vulcanizing, the periphery of the upper bead part of the green tire Can be moved by sliding smoothly with respect to the vulcanizing bladder that is expanding. Therefore, the interference between the holding part and the vulcanization bladder is alleviated. Further, when the holding portion is moved from the holding position to the release position, it is not necessary to move the upper clamp portion downward from the predetermined position, or the downward movement amount from the predetermined position can be reduced as compared with the conventional case. Along with this, the amount of upward movement around the upper end of the vulcanization bladder is reduced while the green tire is set in the vulcanizer and then vulcanized. Therefore, it is advantageous to extend the service life of the vulcanization bladder by suppressing the occurrence of a problem that the periphery of the upper end portion of the vulcanization bladder is locally compressed and deformed.

It is explanatory drawing which illustrates the conveyance apparatus of the tire of this invention by a front view. It is explanatory drawing which illustrates the conveyance apparatus of FIG. 1 by planar view. It is explanatory drawing which illustrates the left half of the vulcanization | cure apparatus with which the green tire was thrown in using the conveying apparatus of FIG. 1 by a longitudinal cross-sectional view. It is explanatory drawing which illustrates the state which expanded the vulcanization bladder of FIG. 3, and hold | maintained the green tire. FIG. 5 is an explanatory view illustrating a state in which the holding unit of FIG. 4 is separated from the green tire. It is explanatory drawing which illustrates the vulcanization | cure apparatus which vulcanizes the green tire by a longitudinal cross-sectional view.

  Hereinafter, a tire transport device of the present invention will be described based on the embodiments shown in the drawings.

  As illustrated in FIG. 6, when the green tire G is vulcanized by the vulcanizer 8, the vulcanization bladder disposed inside the green tire G is expanded with the mold 11 closed. The vulcanizing device 8 includes a central mechanism 9 disposed inside the mold 11. An upper clamp portion 9 b and a lower clamp portion 9 c that are spaced apart from each other are attached to the center post 9 a that constitutes the center mechanism 9. The center post 9a is inserted in the vulcanization bladder 10, and the upper clamp portion 9b and the lower clamp portion 9c hold the upper end portion and the lower end portion of the vulcanization bladder 10, respectively.

  The mold 11 includes a disk-shaped upper mold 11 a and a disk-shaped lower mold 11 b, and a plurality of sector molds 11 c arranged in an annular shape on the outer peripheral side of the vulcanizing bladder 10. The upper mold 11a moves up and down, and each sector mold 11c moves toward and away from the center post 9a. As each sector mold 11c moves close to the center post 9a, these sector molds 11c are assembled in an annular shape.

  The tire conveying device 1 of the present invention illustrated in FIGS. 1 and 2 conveys the green tire G to the vulcanizing device 8 in a suspended state when the green tire G is vulcanized. The transport device 1 includes a main body frame 2 and a holding portion 3 that extends downward from the main body frame 2. In this embodiment, the transport device 1 includes four holding units 3.

  The main body frame 2 has a disc-shaped central portion 2a and an annular outer peripheral portion 2b arranged on the outer peripheral side of the central portion 2a extending radially from the center in plan view of the central portion 2a toward the outer peripheral portion 2b. It has a shape integrated through four existing connection portions 2c. The main body frame 2 may have other shapes.

  One moving arm 2d extending upward is erected at the center of the central portion 2a in plan view. A one-dot chain line CL in the figure indicates a central axis of the main body frame 2 (central portion 2a) in plan view. On the outer peripheral side of the moving arm 2d, four guide rods 7 extend upward from the central portion 2a so as to surround the moving arm 2d. The number of guide bars 7 is, for example, 2-4. Since the moving arm 2a moves up and down and back and forth and back and forth, the transfer device 1 can move to an arbitrary position.

  A disc-shaped moving body 6 that moves up and down is provided above the main body frame 2. The moving body 6 has a through hole 6a penetrating vertically, and the moving arm 2d and the guide rod 7 are inserted through the through hole 6a.

  In the moving body 6, connecting pin portions 5 a are arranged at positions corresponding to the respective holding portions 3. The connecting pin portion 5 a is engaged with an engaging portion 6 b formed on the moving body 6. The engaging portion 6 b extends in the horizontal direction toward the central axis CL of the main body frame 2. In this embodiment, a long hole is employed as the engaging portion 6b.

  A plurality of holding portions 3 are arranged at intervals in the circumferential direction around the central axis CL of the main body frame 2. To stably hold the green tire G, the holding portions 3 are equally spaced in the circumferential direction in plan view. At least three may be arranged. Each holding part 3 has substantially the same specification.

  The holding portion 3 has a circular arc shape extending in a curved manner toward the outer peripheral side with respect to the central axis CL of the main body frame 2 downward. The holding part 3 is formed of metal, resin or the like. The arcuate outer surface 3a of the holding part 3 can be subjected to a low friction process for lowering the friction coefficient relative to the other parts of the holding part 3, or can be formed of a low friction member. Specifically, the arc-shaped outer surface 3a of the holding portion 3 is subjected to a fluororesin coating process, or the arc-shaped outer surface of the holding portion is formed of a fluororesin. The entire holding unit 3 can be subjected to a low friction process, or the entire holding unit 3 can be formed of a low friction member.

  A rotation shaft 4 is fixed at a position corresponding to each holding portion 3 of the main body frame 2 (outer peripheral portion 2b). One end of a connecting portion 5 is rotatably connected to the rotating shaft 4, and the connecting portion 5 is pivotally supported on the main body frame 2 via the rotating shaft 4. The other end portion of the connecting portion 5 and the upper end portion of the holding portion 3 are fixed to the connecting pin portion 5a.

  As the moving body 6 moves up and down, the connecting pin portion 5a moves horizontally along the engaging portion 6b. Along with this, the holding unit 3 rotates around the rotation shaft 4 and moves up and down. The movement trajectory of the holding unit 3 that rotates and moves up and down substantially coincides with the arc-shaped extending direction of the holding unit 3.

  Hereinafter, a procedure for setting the green tire G in the vulcanizing device 8 using the conveying device 1 will be described.

  As illustrated in FIG. 3, the conveying device 1 holding the green tire G is moved to convey the green tire G to the vulcanizing device 8. After positioning the center axis CL of the main body frame 2 so as to substantially coincide with the center axis of the center post 9a, the conveying device 1 is moved downward so that the shrinking vulcanization bladder 10 is inserted into the green tire G. To do.

  At this time, the moving body 6 is moving downward with respect to the main body frame 2, and the holding portion 3 is in the holding position. The holding portion 3 in the holding position holds the periphery of the annular bead portion Bd on the upper side of the green tire G lying down from the inside of the tire. Each holding portion 3 extends curvedly toward the outer peripheral side with respect to the annular bead portion Bd on the upper side of the green tire G. The green tire G conveyed to the vulcanizing device 8 is placed on the lower mold 11b while being held by the holding unit 3.

  Next, as illustrated in FIG. 4, the vulcanization bladder 10 is inflated to some extent and brought into contact with the inner wall of the green tire G, and the green tire G is shaped with the vulcanization bladder 10 holding the green tire G. At this time, the upper clamp part 9b is substantially at the same vertical position as a predetermined position when the mold is closed and vulcanized (position of the upper clamp part 9b illustrated in FIG. 6).

  Next, as illustrated in FIG. 5, the moving body 6 is moved upward with respect to the main body frame 2, and the holding unit 3 is rotated about the rotation shaft 4 and moved upward. As a result, the holding unit 3 moves from the holding position to the release position. By moving to the release position, the holding part 3 moves away from the green tire G held from the inside by the vulcanizing bladder 10 that is expanding, and the holding part 3 is around the annular bead part Bd on the upper side of the green tire G. 3 is released.

  Next, the transport device 1 is moved from directly above the green tire G to another position. Next, the upper mold 11a is moved downward, and each sector mold 11c is moved closer to the center post 9a and assembled in an annular shape, and the mold 11 is closed as shown in FIG. Next, the vulcanization bladder 10 is further expanded to vulcanize the green tire G for a predetermined time.

  In the present invention, the holding portion 3 moves in the arc-shaped extending direction, thereby moving to the holding position and the release position. Therefore, it is possible to minimize the space necessary for the holding unit 3 to move between both positions. Accordingly, when the holding unit 3 is moved from the holding position to the release position, even when the upper clamp portion 9b is in a predetermined position (a predetermined height position illustrated in FIG. 4) when vulcanized, The holding portion 3 that holds the periphery of the upper bead portion Bd of the green tire G can be smoothly slid and moved with respect to the outer surface of the expanding vulcanizing bladder 10. Therefore, there is no problem that the moving holding unit 3 is stuck into the vulcanizing bladder 10 or is rubbed strongly, and the interference between the holding unit 3 and the vulcanizing bladder 10 is alleviated.

  In the conventional conveying device, when the nail-like portion holding the periphery of the upper bead portion Bd of the green tire G is released from the green tire G and released, the predetermined position when the upper clamp portion 9b is vulcanized Therefore, interference between the vulcanizing bladder 10 and the claw-shaped portion is avoided. However, in the present invention, when the holding portion 3 is moved from the holding position to the release position, interference between the holding portion 3 and the vulcanization bladder 10 is alleviated, and therefore it is necessary to move the upper clamp portion 9b downward from the predetermined position. Or the amount of downward movement from the predetermined position can be reduced as compared with the prior art.

  Along with this, while the green tire G is set in the vulcanizing device 8 and vulcanized, the periphery of the upper end of the vulcanizing bladder 10 does not move to a predetermined position with a high bladder internal pressure, or The upward movement amount is reduced. Thereby, generation | occurrence | production of the malfunction which the upper end part periphery of the vulcanization bladder 10 compresses and deforms locally can be suppressed. As a result, damage around the upper end, which was damaged earlier than the lower end of the vulcanization bladder 10, is less likely to occur, which is advantageous for extending the useful life of the vulcanization bladder 10. Further, the replacement frequency of the vulcanization bladder 10 is reduced, and the use of the vulcanization bladder 10 which is unintentionally deformed is eliminated, which contributes to improvement of tire productivity and tire quality.

  When the arcuate outer surface 3a of the holding part 3 is subjected to low friction processing or formed of a low friction member, the holding part 3 that moves from the holding position to the release position and the outside of the vulcanizing bladder 10 Friction with the surface is further reduced. Therefore, it becomes more and more advantageous to prevent the vulcanization bladder 10 from being damaged.

  The structure in which the holding unit 3 is moved in the arc-shaped extending direction to move to the holding position and the release position is not limited to the structure illustrated in the embodiment, and various structures can be adopted. For example, the movement of each holding unit 3 can be individually controlled, and each can be independently moved to the holding position and the release position. In this embodiment, by moving the moving body 6 up and down with respect to the main body frame 2, there is an advantage that all the holding portions 3 can be moved uniformly between the holding position and the release position.

DESCRIPTION OF SYMBOLS 1 Transfer apparatus 2 Main body frame 2a Center part 2b Outer peripheral part 2c Connection part 2d Moving arm 3 Holding part 4 Rotating shaft 5 Connection part 5a Connection pin part 6 Moving body 6a Through hole 6b Engagement part 7 Guide rod 8 Vulcanization apparatus 9 Center Mechanism 9a Center post 9b Upper clamp part 9c Lower clamp part 10 Vulcanized bladder 11 Mold 11a Upper mold 11b Lower mold 11c Sector mold G Green tire Bd Bead part

Claims (4)

A holding portion extending downward from the main body frame, the holding portion being set so as to be movable between a holding position and a release position, and around the annular bead portion on the upper side of the green tire lying sideways at the holding position Is held by the holding portion from the inside of the tire and held by the holding portion with respect to the periphery of the upper annular bead portion of the green tire that is held from the inside by the vulcanizing bladder expanding at the release position. In the tire transport device configured as follows:
The holding portion has an arc shape extending in a curved manner toward the outer peripheral side with respect to the upper annular bead portion downward, and the holding portion moves in the extending direction of the arc shape, A tire transporting device configured to move between the holding position and the release position.   The tire conveyance device according to claim 1, wherein the arc-shaped outer surface of the holding portion is subjected to a low friction process or is formed of a low friction member.   The tire conveyance device according to claim 1 or 2, wherein at least three of the holding portions are arranged on the main body frame at intervals in the circumferential direction in plan view.   A rotating shaft fixed to the main body frame, a rod having one end rotatably connected to the rotating shaft, a connecting pin portion in which the rod and the upper end portion of the holding portion are connected, and the connecting pin portion A movable body that has an engaging portion that extends in the horizontal direction and that moves up and down, and the connecting pin portion moves horizontally along the engaging portion by the vertical movement of the movable body. The tire conveyance according to any one of claims 1 to 3, wherein the holding portion is rotated about the rotation axis by the horizontal movement of the connecting pin portion to move in the arc-shaped extending direction. apparatus.

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