JP2015110301A - Transportation vehicle of green tire, and transportation method of green tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deliver a green tire concentrically between a transportation vehicle and a transfer tool.SOLUTION: A transportation vehicle includes a travel carriage, a pedestal, alignment means and restoration means. The travel carriage includes a center shaft part which projects on a support plane. The pedestal has a ring-shape which surrounds the radial direction outer side of the center shaft part and can move freely on the support plane. The pedestal has an annular receiving surface which concentrically holds a green tire. The alignment means guides the pedestal to the alignment position to be concentric with the green tire gripped by a transfer tool. The restoration means energizes the pedestal toward a reference position where the receiving surface becomes concentric with the center shaft part to restore the pedestal to the reference position.

Description

  The present invention provides a vehicle for transporting a raw tire that can receive and deliver a raw tire while being aligned with each other between the first transfer tool and the second transfer tool. The present invention relates to a tire conveyance method.

  In a tire manufacturing factory, generally, a raw vehicle stored in a storage place is automatically transported to a vulcanizer using a transport vehicle (eg, “AGV”). At this time, on the storage location side, the raw tire is delivered to the transport vehicle by the first transfer tool (for example, “loader”). On the vulcanizer side, the green tires on the transported transported vehicle are received by the second transfer tool and put into the vulcanizing mold (see, for example, Patent Document 1). In addition, the thing of the following patent documents 2 and 3 is known as a 1st, 2nd transfer tool, and the thing of the following patent document 4 is known as a receiving stand holding a raw tire.

  However, when a transport vehicle is used, it is difficult to accurately stop the transport vehicle at a predetermined position. For example, as shown in FIG. 9, the axis Ti of the stopped raw tire T and the raw tire gripping portion of the transfer tool a A positional deviation occurs between the center bi of b. When the raw tire T is gripped in this state, a misalignment or deformation of the raw tire T is caused between the transfer tool a and the gripped raw tire T, so that the raw tire T is inserted into the vulcanization mold. At the time of input, there is a problem that the raw tire T is not set correctly and the tire quality is deteriorated.

JP 2004-122407 A Japanese Utility Model Publication No. 3-44485 Japanese Utility Model Publication No. 7-7911 Japanese Patent Laid-Open No. 9-156639

  Therefore, the invention can automatically align the cradle of the transport vehicle in accordance with the transfer tool even when the stop position of the transport vehicle is deviated, and transfer the raw tires concentrically with the transfer tool. It is an object of the present invention to provide a raw tire transport vehicle and a raw tire transport method that can improve tire quality.

In the first invention of the present application, the first position of the first transfer tool for transferring the horizontally placed raw tire in which the tire axis is vertical at the first position, and the horizontally placed raw tire in the second position. A raw tire transport vehicle for transporting a raw tire to and from the second position of the second transfer tool received by
A traveling carriage capable of traveling between the first position and the second position and having a support plane and a central shaft portion protruding on the support plane;
It forms a ring shape that surrounds the outside of the central shaft in the radial direction, and is supported on the support plane so as to be freely movable around the central shaft, and holds the horizontally placed raw tire concentrically. A cradle having an annular bearing surface,
Alignment means for guiding the cradle to an alignment position where the receiving surface is concentric with the raw tire delivered from the first transfer tool or the raw tire received by the second transfer tool,
And a return means for urging the receiving surface toward a reference position concentric with the central shaft portion, and for returning the receiving table from the alignment position to the reference position.

  In the raw tire conveyance vehicle according to the present invention, the alignment means includes a roller group including a plurality of guide rollers that are rotatably supported by the cradle with a circumferential interval. In transferring and receiving the tire, it is preferable that the roller group is guided to the alignment position by contacting the bead hole of the raw tire.

  In the raw tire conveyance vehicle according to the present invention, it is preferable that the receiving surface receives a lower tire side surface of the horizontally placed raw tire.

  In the raw tire transport vehicle according to the present invention, it is preferable that the return means includes a plurality of spring bodies that radially connect the outer periphery of the central shaft portion and the inner periphery of the cradle.

  In the raw tire conveyance vehicle according to the present invention, it is preferable that the cradle includes a ball caster that can roll on the support plane in any direction on the lower surface.

  In the raw tire conveyance vehicle according to the present invention, it is preferable that the traveling carriage includes separation preventing means for preventing the cradle from being lifted upward from the support plane.

A second invention of the present application is a raw tire transport method for transporting a raw tire using the transport vehicle of the first invention,
A delivery step of delivering the horizontally placed raw tire from the first transfer tool to the cradle of the transport vehicle at the first position; and the delivered raw tire from the first position to the second position by the transport vehicle. A transport step for transporting to a position;
A receiving step for causing the second transfer tool to receive the conveyed raw tire from the cradle at the second position;
In the delivery step and the receiving step, the cradle is provided with a raw tire having a receiving surface of the cradle delivered from the first transfer tool and a raw tire received by the second transfer tool by means of alignment means. It is characterized by being guided to a concentric alignment position.

  Since the present invention is configured as described above, even if the stop position of the transport vehicle is misaligned, the cradle of the transport vehicle can be automatically aligned based on the transfer tool. It becomes possible to deliver the raw tire concentrically with the mounting tool.

It is sectional drawing which shows one Example of the conveyance vehicle of the raw tire of this invention. FIG. It is a fragmentary sectional view showing guidance to a cradle by alignment means. It is a front view which shows a guide roller. It is a top view which shows the cradle in the alignment state. (A), (B) is sectional drawing which shows delivery of the raw tire by a 1st transfer tool. (A), (B) is sectional drawing which shows reception of the raw tire by a 2nd transfer tool. It is a conceptual diagram which shows the conveyance method of the raw tire by a conveyance vehicle. It is sectional drawing explaining the conventional problem.

Hereinafter, embodiments of the present invention will be described in detail.
As conceptually shown in FIG. 8, the raw tire conveyance vehicle 1 (hereinafter referred to as “conveyance vehicle 1”) of the present embodiment includes a raw tire T in a horizontally placed state Y in which the tire axis Ti is vertical. Transport from the first position P1 to the second position P2. Hereinafter, the raw tire T is assumed to be in a horizontally placed state Y, and is not particularly described as “a horizontally placed state Y”.

  The first position P1 is a position where the first transfer tool 2 transfers the raw tire T to the transport vehicle 1, and the second position P2 is a position where the second transfer tool 3 transfers the raw tire T from the transport vehicle 1. It is the receiving position.

  The first and second transfer tools 2 and 3 are loaders for transferring raw tires, and those having a conventional well-known structure can be employed. The first and second transfer tools 2 and 3 of the present example can detachably hold the raw tire T attached to the tip of the arm 5 and the arm 5 supported so as to be movable up and down and turnable on the support column, respectively. A grip 6. The grip portion 6 includes a chuck 7 capable of expanding and contracting the diameter of the bead portion Ta on the upper side of the green tire T. The chuck 7 has a plurality (four in this example) of chuck claws 7A distributed in the circumferential direction, and a hook portion 7A1 projects outwardly at the lower end of each chuck claw 7A. The chuck claw 7A can move inward and outward in the radial direction between a reduced diameter state capable of passing through the bead hole and a diameter expanded state in which the hook portion 7A1 engages the inner surface of the bead portion Ta.

  And in the 1st transfer tool 2, the holding part 6 raises / lowers in the position where the center 6i of the holding part 6 becomes the 1st position P1, and delivers the raw tire T to the conveyance vehicle 1. Further, in the second transfer tool 3, the gripping part 6 moves up and down at a position where the center 6 i of the gripping part 6 becomes the second position P <b> 2 and receives the raw tire T from the transport vehicle 1.

  As shown in FIGS. 1 and 2, the transport vehicle 1 includes a traveling carriage 8, a cradle 9, an alignment means 10, and a return means 11.

  The traveling carriage 8 is an automatic conveyance vehicle used for, for example, AGV, and can travel between the first position P1 and the second position P2. The traveling carriage 8 includes a smooth support plane 12 on its upper surface, and a cylindrical central shaft portion 13 in this example that protrudes upward from the support plane 12.

  The cradle 9 has a ring-shaped base body 9A surrounding the outer side of the central shaft portion 13 in the radial direction, and the base body 9A moves on the support plane 12 in any direction around the central shaft portion 13. Supported as possible. As shown in FIG. 3, in this example, a plurality of ball casters 14 that can roll on the support plane 12 in any direction are attached to the lower surface of the base 9 </ b> A, and can move in any direction. A ball caster 14 may be disposed on the support plane 12 over the entire surface.

  9 A of said base | substrates are provided with the annular | circular shaped receiving surface 15 which hold | maintains the said raw tire T concentrically on the upper surface. The receiving surface 15 of this example is formed of a cone surface that is inclined downward toward the center of the base body 9A, and holds the raw tire T concentrically by receiving the lower tire side surface TS of the raw tire T. The receiving surface 15 does not need to receive the entire surface of the lower tire side surface TS, and preferably receives at least a part thereof, preferably a surface portion on the tread side with little deformation.

  The alignment means 10 may be referred to as a raw tire T delivered from the first transfer tool 2 or a raw tire T received by the second transfer tool 2 (hereinafter referred to as a “raw / delivered raw tire T”). The cradle 9 is guided to the alignment position PA. As shown in FIGS. 6B and 7B, the alignment position PA is a position where the receiving surface 15 is concentric with the raw tire T at the time of receiving / delivering. The guide 9 is guided at the time of receiving / delivering, and the center 15i of the receiving surface 15 is made to coincide with the axial center Ti of the raw tire T at the time of receiving / delivering.

  Specifically, as shown in FIG. 2, the alignment means 10 includes a roller group 16 </ b> G composed of a plurality of (four or more, four in this example) guide rollers 16 pivotally supported by the cradle 9. . Each guide roller 16 is arranged on a circumferential line concentric with the receiving surface 15 with an interval (preferably equal interval) in the circumferential direction. Each guide roller 16 is pivotally supported via a roller holder 17 so as to be rotatable around an axis 16i oriented in a direction perpendicular to the radial direction centering on the center 15i.

  As shown in FIG. 4, the contour shape of the outer peripheral surface 16 </ b> S of the guide roller 16 is a convex arc shape having a curvature radius r. Preferably, the radius of curvature r is equal to or less than a radius R (shown in FIG. 2) of a circle circumscribing the roller group 16G around the center 15i, and particularly preferably smaller than the radius R. The roller group 16G comes into contact with the bead hole Th of the raw tire T at the time of receiving / delivering, thereby guiding the cradle 9 to the alignment position PA. The radius of the bead hole Th and the radius R are substantially equal.

  The return means 11 urges the cradle 9 toward the reference position PB where the receiving surface 15 is concentric with the central shaft portion 13, thereby causing the cradle 9 to move from the alignment position PA to the reference position PB. Return to.

  Specifically, the return means 11 includes a plurality of spring bodies 18 that radially connect the outer periphery of the central shaft portion 13 and the inner periphery of the cradle 9. The spring body 18 of this example is a compression coil spring, and as shown in FIG. 3, both ends of the spring body 18 protrude from the outer peripheral surface of the central shaft portion 13, and the inside of the cradle 9. It is attached by extrapolating the locking pin portion 9p protruding from the peripheral surface. In a normal state where no external force is applied to the cradle 9, each spring body 18 biases toward the center 13 i of the central shaft portion 13 to return the cradle 9 to the reference position PB. When receiving / delivering an external force applied to the cradle 9, as shown in FIG. 5, each spring body 18 can be freely deformed by the external force, thus preventing the cradle 9 from moving to the alignment position PA. Must not. As the spring body 18, a tension coil spring can be used.

  As shown in FIGS. 1 and 2, the transport vehicle 1 of the present example includes separation preventing means 20 that prevents the cradle 9 from being lifted upward from the support plane 12. The separation preventing means 20 of the present example is formed of an overhanging plate portion 20A that projects horizontally from the outer peripheral surface of the cradle 9 and a suppression plate 20B that is attached to the traveling carriage 8 and suppresses the lifting of the overhanging plate portion 20A. . Such separation preventing means 20 prevents the cradle 9 from being lifted together when the second transfer tool 3 receives the raw tire T from the transport vehicle 1 due to the adhesion between the raw tire T and the receiving surface 15. .

Next, in the raw tire transport method using the transport vehicle 1, as shown in FIG.
A delivery step S1 for delivering the raw tire T from the first transfer tool 2 to the cradle 9 at the first position P1,
A transport step S2 for transporting the delivered raw tire T from the first position P1 to the second position P2 by the transport vehicle 1;
-The receiving step S3 which makes the 2nd transfer tool 3 receive the conveyed raw tire T from the receiving stand 9 in the 2nd position P2.

  FIG. 6A shows a case where the stop position of the transport vehicle 1 and the delivery position of the raw tire T in the first transfer tool 2 are misaligned in the delivery step S1. That is, the center 13i of the transport vehicle 1 at the time of stop and the first position P1 of the first transfer tool 2 are displaced. When the chuck tool 7 is lowered in this misalignment state, as shown in FIG. 6B, when the bead hole Th of the gripped raw tire T passes through the roller group 16G (alignment means 10), the roller Contact group 16G. Thereby, the cradle 9 receives an external force and moves from the reference position PB to the alignment position PA. That is, the raw tire T can be transferred concentrically with the receiving surface 15.

  In the conveying step S2, the cradle 9 is returned from the alignment position PA to the reference position PB by the urging force by the return means 11.

  FIG. 7 (A) shows a case in which the stopping position of the transport vehicle 1 and the receiving position of the raw tire T in the second transfer tool 3 are misaligned in the receiving step S3. That is, the center 13i of the transport vehicle 1 at the time of stop and the second position P2 of the second transfer tool 3 are displaced. When the chuck tool 7 descends and expands in this misalignment state, the bead hole Th of the gripped raw tire T contacts the roller group 16G (alignment means 10) as shown in FIG. 7B. Then, the cradle 9 is moved from the reference position PB to the alignment position PA. Thereby, the raw tire T can be received concentrically with the grip part 6.

  The alignment means 10 can be configured such that each guide roller 16 is supported so as to be movable inward and outward in the radial direction about the center 15i, and the radius R of a circle circumscribing the roller group 16G can be adjusted. In this case, it is not necessary to replace the alignment means 10 in accordance with the size of the raw tire T to be conveyed, and versatility can be improved.

  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 Conveyance vehicle 2 1st transfer tool 3 2nd transfer tool 8 Traveling carriage 9 Receiving base 10 Centering means 11 Restoring means 12 Support plane 13 Central shaft part 14 Ball caster 15 Receiving surface 16 Guide roller 16G Roller group 18 Spring body 20 Separation prevention means P1 First position P2 Second position PA Alignment position PB Reference position S1 Delivery step S2 Conveyance step S3 Reception step T Raw tire Th Bead hole Ti Tire axis TS Tire side surface Y Sideways state

Claims (7)

The first position of the first transfer tool for transferring the horizontally placed raw tire with the tire axis perpendicular to the first position, and the second transfer of receiving the horizontally placed raw tire at the second position. A raw tire transport vehicle for transporting a raw tire to and from the second position of the tool,
A traveling carriage capable of traveling between the first position and the second position and having a support plane and a central shaft portion protruding on the support plane;
It forms a ring shape that surrounds the outside of the central shaft in the radial direction, and is supported on the support plane so as to be freely movable around the central shaft, and holds the horizontally placed raw tire concentrically. A cradle having an annular bearing surface,
Alignment means for guiding the cradle to an alignment position where the receiving surface is concentric with the raw tire delivered from the first transfer tool or the raw tire received by the second transfer tool,
And a return means that urges the receiving surface toward a reference position that is concentric with the central shaft portion and returns the receiving table from the alignment position to the reference position. vehicle.   The aligning means includes a roller group composed of a plurality of guide rollers pivotally supported on the cradle with a circumferential interval, and the roller group is generated when the raw tire is delivered and received. 2. The vehicle according to claim 1, wherein the cradle is guided to an alignment position by contacting a bead hole of the tire.   The vehicle according to claim 1 or 2, wherein the receiving surface receives a lower tire side surface of the horizontally placed raw tire.   The said return means is provided with the some spring body which connects radially between the outer periphery of the said center axis | shaft part, and the inner periphery of the said receiving stand, The raw material in any one of Claims 1-3 characterized by the above-mentioned. Tire transport vehicle.   5. The raw tire transport vehicle according to claim 1, wherein the cradle includes a ball caster on a lower surface thereof that can roll in any direction on the support plane.   6. The vehicle for transporting raw tires according to claim 1, wherein the traveling carriage includes separation preventing means for preventing the cradle from being lifted upward from the support plane. A raw tire transport method for transporting a raw tire using the transport vehicle according to claim 1,
A delivery step of delivering the horizontally placed raw tire from the first transfer tool to the cradle of the transport vehicle at the first position; and the delivered raw tire from the first position to the second position by the transport vehicle. A transport step for transporting to a position;
A receiving step for causing the second transfer tool to receive the conveyed raw tire from the cradle at the second position;
In the delivery step and the receiving step, the cradle is provided with a raw tire having a receiving surface of the cradle delivered from the first transfer tool and a raw tire received by the second transfer tool by means of alignment means. A raw tire conveying method, wherein the tire is guided to a concentric alignment position.

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