JPH07205331A - Tire outside diameter holding device - Google Patents

Abstract

PURPOSE:To provide a tire outside diameter holding device which can hold a tire reliably without deforming it, simultaneously with holding the tire, centering can be performed and a holding condition of the green tire can be changed to an arbitrary position, in the case where especially a green tire is raised by holding. CONSTITUTION:In an outside diameter holding device 11, the central parts, which are confronted with each other, of a hollow and square-shaped (almost octagon) handframe 22 are fitted turnably to the inside of a portal frame 20 suspended elevatably through a turning shaft 21, the hand frame 22 is constituted so that it can be turned at an arbitrary angle (for example, 90 deg.) through a turning and driving device 23 such as an air cylinder set up between the portal frame 20 and hand frame 22. In the turning and driving device 23, a base end part 23a of the air cylinder is fixed to the side of the portal frame 20 and the rod 23b is connected with the hand frame 22 through a bracket 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire outer diameter gripping device, and more particularly to a tire outer diameter gripping device capable of reliably gripping a green tire in a centered state without deforming it. Is.

[0002]

2. Description of the Related Art Conventionally, it has been known to apply a release agent to the inner surface of a molded green tire (unvulcanized tire) in order to improve the releasability from a mold and a bladder. As an apparatus for applying the release agent and the like, for example, as shown in Japanese Patent Publication No. 51-3754 and FIGS. 9 and 10 proposed by the applicant of the present application, the inner diameter of the green tire W placed in a horizontal state. The plurality of chucking claws 2 that can be opened and closed via the link mechanism 1 are inserted into the portion from above, and the plurality of chucking claws 2 are expanded to open the green tire W.
Hold several places of the bead Wa from inside. Then, after lifting the green tire W from that state, the release agent spray gun 3 is pressed from the center of the lower inner diameter of the green tire W.
And the mold release agent Q is applied to the inner surface of the green tire W while the green tire W is being rotated.

[0003]

By the way, in the above-mentioned device, while the chucking claw 2 holds several parts of the inner diameter bead portion Wa of the green tire W, the green gun W is rotated by the spray gun 3 in a fixed state while being rotated. Since it is configured to apply the mold release agent Q, the release mold release agent Q is caught on the chucking claw 2, and the residue of the release mold release agent Q may be attached.
There is a problem that uneven coating of the release agent Q occurs.

When gripping the green tire W,
Since the bead portion Wa on one side of the green tire W is grasped and hung by the chucking claw 2, the side portion of the green tire W is stretched and deformed due to the weight of the green tire W, or is gripped by the chucking claw 2. There was a problem that the part would be deformed. Further, when it is attempted to apply the release agent Q uniformly and evenly to the inner diameter bead portion Wa of the green tire W, as shown in FIG. There was a problem of scattering and causing product failure.

The present invention has been devised in view of such conventional problems, and particularly when gripping and lifting a green tire or the like, the tire can be securely gripped without being deformed, and the green tire can be gripped. It is an object of the present invention to provide a tire outer diameter gripping device capable of centering at the same time as gripping, and changing the gripped state of the green tire to an arbitrary position.

[0006]

In order to achieve the above object, the present invention has a hollow hand which can be swung at a predetermined angle through a swivel drive means inside a portal frame suspended so as to be lifted and lowered. The gist of the invention is to attach a frame and to provide a plurality of tire outer diameter gripping members provided with a pressing cylinder at a predetermined interval inside the hand frame.

[0007]

The present invention is constructed as described above and lowers the portal frame provided with the hand frame with respect to the green tire placed at a predetermined position in an arbitrary state,
With the target green tire located inside the tire outer diameter gripping member of the hand frame, the pressing cylinder is operated to move the plurality of tire outer diameter gripping members toward the tire center side, and the number of outer diameters of the green tire Grip with a predetermined pressure while centering the place.

After that, the portal frame provided with the hand frame holding the green tire is raised, and the hand frame is turned to a predetermined angle through the turning drive means. As a result, the green tire can grip the outer diameter portion of the tire without being deformed, is centered, and can be further swung at an arbitrary angle to proceed to the work of the next step.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a schematic configuration diagram of a release agent applying apparatus 10 embodying the present invention, and FIG. 2 shows a fixed state green tire W whose outer diameter is gripped by a tire outer diameter gripping device 11 by a rotatable spray gun 3. Release agent Q
The schematic block diagram of the release agent coating device 10 showing the step of coating is shown.

The green tire W includes closing plates 12a and 12b for closing both inner diameter hollow portions of the green tire W inside the green tire W whose outer diameter is gripped by an outer diameter gripping device 11, which will be described later, and a release agent. Dust collector 1 for collecting dust
The spray gun 3 equipped with the spray gun 3 is inserted up to the center of the green tire W, and the spray gun shaft 1 is rotated while rotating through the rotary drive motor 14 and the rotary joint 15.
The air A and the release agent Q are supplied from the communication passage 17 provided in the nozzle 6, and the mixture of the air A and the release agent Q is sprayed from the nozzle 19.

Next, the configurations of the outer diameter gripping device 11 and the spray gun 3 as described above will be specifically described below. As shown in FIGS. 4 to 6, the outer diameter gripping device 11 includes a swivel shaft 21 inside a portal frame 20 suspended so as to be able to move up and down.
Hollow square-shaped (approximately octagonal) hand frame 22 through
The hand frames 22 are mounted so as to be pivotable at opposite center portions thereof.
Revolving drive means 2 such as an air cylinder installed between and
It is configured so that it can be swung at an arbitrary angle (for example, 90 °) via the switch 3. In the turning drive means 23, a base end portion 23a of an air cylinder is fixed to a side surface of the gate frame 20, and a rod 23b is connected to the hand frame 22 via a bracket 24.

Further, inside the hand frame 22,
A plurality of tire outer diameter gripping members 26 each provided with a press cylinder 25 are provided at predetermined intervals (four points at 90 ° intervals in this embodiment). Is formed in an arc shape with a radius of curvature that can correspond to the maximum diameter of the green tire W. Therefore, the gate-shaped frame 20 including the hand frame 22 is lowered with respect to the green tire W placed at a predetermined position in an arbitrary state, and the target is placed inside the tire outer diameter gripping member 26 of the hand frame 22. In a state where the green tire W is located, the pressing cylinders 25 are extended to move the plurality of tire outer diameter gripping members 26 toward the tire center side, and predetermined positions while centering several points of the outer diameter of the green tire W. Grip with pressure.

Thereafter, the portal frame 20 having the hand frame 22 holding the green tire W is raised,
The hand frame 22 is turned by a turning drive means 23 at a predetermined angle. As a result, the green tire W can be gripped at the outer diameter portion of the tire without being deformed, centered, and further swung at an arbitrary angle to proceed to the work of the next step.

Next, as shown in FIGS. 1, 7 and 8, the structure of the spray gun 3 is that of a spray gun shaft 16 having a communication passage 17 through which a mixture of air A and a release agent Q flows. The base end portion is connected to the rotary joint 15, and the spray gun shaft 16 has at its base end portion two annular grooves 27a formed in the rotary joint 15.
A plurality of communication holes 28a and 28b communicating with 27b are provided. The annular grooves 27a, 27b formed in the rotary joint 15 are connected to the supply paths 29a, 29b for the air A and the release agent Q, and the spray gun shaft 16
It is configured so that the mixture of the air A and the release agent Q can be sprayed from the nozzle 19 even when the roller rotates.

The rotary drive motor 14 is connected to the lower end of the spray gun shaft 16 through the rotary joint 15 via a transmission means 35 such as a gear mechanism, and the nozzle 19 is provided at the tip of the spray gun shaft 16. It is connected. Further, the tire outer diameter gripping device 11
As shown in FIG. 2, the closing plates 12a, 12b for closing the inner diameter hollow portions of the green tire W gripped by the pair of left and right cylinders 31a installed on the supporting plate 30 for supporting the tire outer diameter gripping device 11 are shown in FIG. , 31b and the holding plate 32, and the cylinders 31a, 31b.
Of the green tire W gripped by the tire outer diameter gripping device 11 by the synchronous operation of the above, and the spray gun 3 is attached to one of the closing plates 12a and 12b. .

Also, the above-mentioned closing plates 12a, 12b.
A pipe 13a of a dust collecting device 13 that collects the release agent Q inside the green tire W is connected to the above to prevent the release agent Q from scattering to the outside at the time of applying the release agent Q. ing. As described above, in this embodiment, the green tire W in the fixed state whose outer diameter is gripped by the tire outer diameter gripping device 11 is fixed.
Insert the rotatable spray gun 3 into the
Since the release agent Q is applied to the inner surface of the green tire W while rotating the spray gun 3, the application of the release agent Q becomes uniform and the release agent can be applied efficiently.

Further, by attaching the closing plates 12a and 12b for closing the inner diameter hollow portions of the green tire W and the dust collecting device 13 for collecting the release agent Q, the release agent Q is scattered to the outside of the tire. Product failure can be prevented in advance, and since the tire rotation drive device is not used as in the prior art, the device does not increase in size and can be easily installed even in a narrow space.

In this embodiment, the outer diameter gripping device 11
However, the present invention is not limited to this example, and may be carried out in the tire forming step and the conveying step such as the tire conveying and centering device.

[0019]

As described above, according to the present invention, a hollow hand frame which can be swung at a predetermined angle through a swivel drive means is attached to the inside of the portal frame suspended so that it can be lifted and lowered. Since a plurality of tire outer diameter gripping members provided with a pressing cylinder at predetermined intervals are provided inside the frame, especially when gripping and lifting a green tire etc., it is possible to securely grip the tire without deforming it. In addition, the green tire can be gripped and centered at the same time, and the gripped state of the green tire can be changed to an arbitrary position.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a release agent coating apparatus embodying the present invention.

FIG. 2 is a schematic configuration diagram of a release agent applying apparatus showing a step of applying a release agent to a fixed green tire whose outer diameter is held by a tire outer diameter holding apparatus by a rotatable spray gun.

FIG. 3 is a cross-sectional view showing a state in which a release agent is applied to the inner surface of a green tire.

FIG. 4 is a perspective view of a tire outer diameter gripping device.

FIG. 5 is a front view of a tire outer diameter gripping device.

FIG. 6 is a side view of a tire outer diameter gripping device.

FIG. 7 is a sectional view of a rotary joint to which a spray gun is connected.

FIG. 8 is a front view showing a mounted state of the spray gun shaft.

FIG. 9 is a schematic configuration diagram of a conventional release agent coating device.

FIG. 10 is an explanatory view of a chucking claw of a conventional green tire.

FIG. 11 is a perspective view showing a state where a release agent is applied to the inner surface of a conventional green tire.

[Explanation of symbols]

20 portal frame 21 turning shaft 22 hand frame 23 turning drive means 25 pressing cylinder 26 tire outer diameter gripping member W green tire Q release agent

Claims (1)

[Claims] 1. A hollow hand frame which can be swung at a predetermined angle via a swivel drive means is attached to the inside of a portal frame suspended so as to be able to move up and down, and a predetermined space is provided inside the hand frame. A tire outer diameter gripping device provided with a plurality of tire outer diameter gripping members that are separated from each other and that are provided with a pressing cylinder.