JPH0664884A - Automatic centering tire lifting method and device therefor - Google Patents

Abstract

PURPOSE:To provide an automatic centering type tire lifting method and device therefor which hold, lift, and convey a green tire without deforming the tire. CONSTITUTION:A vertically and horizontally movable guide plate 4 is placed on a horizontally movable base plate 2, horizontally supported by a support frame 1, through a guide device 3. An elevating cylinder 11 and a plurality of guide rods 12 arranged to the periphery of the elevating cylinder are vertically erected on a guide plate 4. A support plate 14 is horizontally mounted on the lower ends of the rod 11a of the elevating cylinder 11 and the guide rod 12 through a support plate 13. A plurality of chucking claws 16 being almost an L-shape expandable around a fulcrum 15 are rockably mounted on the peripheral edge part of the support plate 14. An L-shaped lock part 17 engaged with the bore Wa of the upper bead part of a green tire W is attached to the tip of each chucking claw 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-centering type tire lifting method and apparatus thereof, and more particularly, to a center of a conveyed green tire, which is held by centering the tire lifting device. The present invention relates to a self-centering type tire hoisting method and apparatus capable of holding, hoisting and transferring without deformation.

[0002]

2. Description of the Related Art Conventionally, when pre-vulcanized (unvulcanized) green tires are stored on a free roller conveyor, the green tires are placed one by one on a pallet to prevent deformation of the green tires. A tire lifting device is used for lifting while holding the inner diameter of the bead portion of a green tire.

[0003]

When the inner diameter of the bead portion of the green tire is held by the chucking claws of the tire lifting device as described above, the tire lifting device and the green tire are used for the purpose of preventing deformation of the green tire. It is necessary to center the green tire with the centering device at the installation position of the tire lifting device.

However, the centering device for a green tire has a problem in that it is difficult to perform centering unless it has a fairly complicated mechanism, depending on the relationship between the front and rear systems, and the structure is complicated and expensive. The present invention has been devised in view of such conventional problems, and is an automatic centering type capable of holding and lifting and transporting a green tire with a simple mechanism and structure without deforming the green tire. An object of the present invention is to provide a tire lifting method and a tire lifting method.

[0005]

In order to achieve the above-mentioned object, the present invention mounts a guide plate movable in the front-rear direction and the left-right direction on a horizontally movable base plate through a guide device. A device for centering the guide plate is installed, and a support plate that can be lifted and lowered is hung from the guide plate through a lift cylinder, and a plurality of chuckings that can be expanded and contracted around a fulcrum are provided around the support plate. A claw is provided, a locking portion that engages with the inner diameter of the upper bead portion of the green tire is provided at the tip of the chucking claw, and the rear end is connected to the expansion / contraction cylinder installed on the support plate. It is what

[0006]

The present invention is constructed as described above, and is provided in the inner diameter portion of the green tire which has been conveyed and is stationary.
Insert multiple chucking claws that can be expanded and contracted from above,
Expand the chucking claw and at the tip of the chucking claw,
The inner diameter of the upper bead portion of the green tire is locked, and the support center of the chucking claw is moved forward and backward and left and right by the reaction force at the time of locking to center the center of the green tire. In a state where the green tire is held by the king claw, the green tire is lifted together with the chucking claw, and then the green tire can be centered at the center of the apparatus and transferred to a predetermined position.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial front view of a self-centering type tire lifting device embodying the present invention, and FIG. 2 is A of FIG.
FIG. 2A is an enlarged plan view as seen from the direction of arrow A, in which a guide plate 4 movable in the front-rear and left-right directions via a guide device 3 is placed on a horizontally movable base plate 2 supported horizontally by a support frame 1. Has been done.

The guide device 3 includes a guide rail 5 for guiding the guide plate 4 in the left-right direction in FIG. 1, a block base 7 having an X block 6 engaged with the guide rail 5, and a block base 7 on the block base 7. 1, a guide rail 8 for guiding in the front-back direction and a Y block 9 that is attached to the bottom of the guide plate 4 and engages with the guide rail 8 are provided in the center of the base plate 2 and the block base 7. A rectangular hollow portion 10 is formed.

On the guide plate 4, an elevating cylinder 11 and a plurality of guide rods 12 are vertically installed upright around the elevating cylinder 11, and the elevating cylinder 11 has a rod 11a.
The guide rod 12 penetrates through the hollow portion 10 formed at the center of the base plate 2 and the block base 7 and is suspended vertically downward. The lifting cylinder 1
A support plate 14 is horizontally attached to the lower end of the rod 11a and the lower end of the guide rod 12 by means of a plate 13, and the support plate 14 can be expanded and contracted around a fulcrum 15 such as a shaft at the peripheral edge thereof. A plurality of substantially L-shaped chucking claws 16 are swingably attached. An L-shaped locking portion 17 that engages with the inner diameter Wa of the upper bead portion of the green tire W is attached to the tip of the chucking claw 16, and the rear end of each chucking claw 16 has a pin 1
It is rotatably attached to the holding member 19 via 8.

The central portion of the holding member 19 is connected to the rod 20a of the expansion / contraction cylinder 20 installed on the support plate 14, and the chucking claw 16 is moved about the fulcrum 15 by the expansion / contraction operation of the expansion / contraction cylinder 20. Is expanded and contracted as indicated by the chain double-dashed line and arrow in FIG. Reference numeral 21 in FIG. 2 denotes a moving cylinder (centering device) for centering the guide plate 4 by moving the guide plate 4 left and right and back and forth. The guide plate 4 is positioned at the center of the device when the cylinder 21 is out. It is placed in a fixed position.

As the guide device 3 of the above embodiment,
Although it is composed of an X block 6 that engages with the guide rail 5 and a Y block 9 that engages with the guide rail 8 and the like, the present invention is not limited to this embodiment, and a plurality of blocks may be provided between the base plate 2 and the guide plate 4. The guide plate 4 may be movable back and forth and left and right by interposing a free roller or the like.

Next, a method of hoisting the green tire W will be described with reference to FIGS. First, as shown in FIG. 3, the green tire W that has been conveyed and stands still.
With respect to the center OO of the green tire W, the chucking claw 16 is lowered via the elevating cylinder 11 from a position where the center XX of the self-centering type tire lifting device is eccentric, and the chucking claw 16 is expanded and contracted within the inner diameter portion of the green tire W. Possible multiple chucking claws 1
Insert 6 from above. Next, as shown in FIG. 4, the expansion / contraction cylinder 20 is actuated to expand the chucking claw 16, and the L-shaped engaging portion 17 provided at the tip of the chucking claw 16 is used to move the upper part of the green tire W. Bead inner diameter W
While a is locked, the supporting center of the chucking claw 16 is moved forward and backward and left and right through the guide device 3 with respect to the center XX of the self-centering type tire lifting device by the reaction force at the time of locking. It is moved and centered at the center of the green tire W (center OO of the green tire W).

Then, while the green tire W is held by the centering chucking claw 16, the green tire W is raised together with the chucking claw 16.
After the cylinder 21 is taken out and centered at the center XX of the device (see FIG. 5), it is transferred to a predetermined position, and the chucking claw 16 is lowered at the predetermined position to chuck as shown in FIG. The green tire W is opened by contracting the claws 16.

By repeating the above operation, the green tire W can be held by the chucking claws 16 without being centered with respect to the self-centering type tire lifting device. Therefore, the green tire W can be reliably held and lifted by a simple mechanism and structure, centered at a target position, and then transferred.

[0015]

As described above, according to the present invention, when the green tire is held by the chucking claws, the reaction force causes the tire lifting device side to move to perform centering, thereby applying an unreasonable force to the green tire. Can be held without hanging,
With a simple mechanism and structure, the green tire can be reliably held and lifted, centered at a target position, and then transferred, and the structure is simple, so that there is an effect that it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a partial front view of a self-centering type tire lifting device embodying the present invention.

FIG. 2 is an enlarged plan view taken along the line AA of FIG.

FIG. 3 is an operation explanatory view showing a state in which a plurality of expandable and contractible chucking claws are inserted from above into the inner diameter portion of the green tire.

[Fig. 4] Fig. 4 shows that the chucking claw is expanded in the inner diameter portion of the green tire to lock the inner diameter of the upper bead portion of the green tire with the L-shaped locking portion, and the reaction force at the time of this locking FIG. 7 is an operation explanatory view showing a state in which the support center of the chucking claw is moved in the front-rear direction and the left-right direction via the guide device and centered at the center of the green tire.

FIG. 5 is an operation explanatory view showing a state in which the cylinder is operated and the chucking claw and the green tire are centered on the center of the apparatus after the green tire is lifted.

FIG. 6 is an explanatory diagram showing a state in which the green tire is transferred to a predetermined position and the green tire is released from the chucking claw.

[Explanation of symbols]

1 Support Frame 2 Base Plate 3 Guide Device 4 Guide Plate 11 Elevating Cylinder 12 Guide Rod 13 Plate 14 Support Plate 15 Support Point 16 Chucking Claw 17 Locking Part 18 Pin 19 Holding Member 20 Expansion / Collision Cylinder 21 Moving Cylinder (Centering Device) W Green Tire Wa Upper bead part inner diameter

Claims (2)

[Claims] 1. A plurality of chucking claws that can be expanded and contracted are inserted from above into the inner diameter portion of a green tire that has been conveyed and is stationary, and the chucking claws are expanded to open at the tip of the chucking claws. The inner diameter of the upper bead portion of the green tire is locked, and the support center of the chucking claw is moved forward and backward and left and right by the reaction force at the time of locking to center the center of the green tire. A method for lifting a self-aligning tire, comprising raising a green tire together with a chucking claw while holding the green tire by a king claw, then centering the green tire and moving it to a predetermined position. 2. A guide plate, which is movable in the front-rear direction and the left-right direction, is placed on a horizontally movable base plate via a guide device, and a device for centering the guide plate is installed. Suspend a support plate that can be raised and lowered via a lift cylinder, and at the peripheral edge of the support plate, arrange a plurality of chucking claws that can be expanded and contracted around a fulcrum, and at the tip of the chucking claw, A self-centering type tire lifting device, characterized in that a locking portion that engages with an inner diameter of an upper bead portion of a green tire is provided, and a rear end of the green tire is connected to an expansion / contraction cylinder installed on the support plate.