JP2001301432A - Disc tool for mounting and demounting device of tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc tool mounted on a mounting and demounting device of a tire, used for separating a tire bead fixed to the bead surface of a wheel, and not damaging the wheel surface when the tire bead is separated. SOLUTION: This disc tool 1 is formed in a disc shape, thinned and sharpened in the outer circumference, rotatably pivoted to the tip of an arm 2 extending from a moving table 6 of the mounting and demounting device, and made of resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk tool attached to a tire attaching / detaching device.

[0002]

2. Description of the Related Art Various types of tire attachment / detachment devices are known. Basically, a wheel is attached to a main shaft and a bead roller is pressed against a tire side surface and a bead surface while rotating. . FIG. 4 shows a specific example of a conventional tire attaching / detaching device, in which a base (a) is attached to a body (b)
And a mounting plate that secures the wheel to the body (b)
The main shaft (d) with (c) fixed to the tip is mounted horizontally.

Then, guide rails (e) and (e) on the base
Are provided in parallel with the main shaft (d), the guide rail (e),
A moving table (f) is slidably attached to (e) via a feeding device, and bead rollers (g) and (g) that can be adjusted to expand and contract by operating a handle are mounted on the moving table. A wheel is fixed to the mounting board (c), and the tire mounted on the wheel can be removed from the wheel while rotating the tire while pressing the bead roller from the side.

FIG. 5 shows a case in which the bead roller (g) is pressed against the side of the tire to remove the tire (h). The bead surface (R) is the bead surface (R) of the wheel (N)
May not be separated from each other. Therefore, simply pressing the side of the tire as shown in the figure only deforms the tire and does not come off the wheel.

Therefore, a bead roller as shown in FIG.
(E), this bead roller (E) has a conical tip, and its outer diameter is increased.
Is pressed. However, even if you use a bead roller (e) with a large tip,
The firmly fixed bead (R) is the bead surface of the wheel (R)
Hard to peel off from If the bead portion (r) is brought closer to the wheel (nu) in order to press it, there is a risk that the tip of the bead roller (e) comes into contact with the ear (wa) and is scratched.

[0006] For example, in the case of an aircraft tire, it is said that when the aircraft lands, a high temperature of about 400 ° C is reached by frictional heat with the road surface. Therefore, the bead portion of the tire is seized by this heat and firmly adheres to the bead surface. And since the radial tire with steel wire embedded is used to reduce the strength and weight of the tire, the whole tire is soft and the tire is deformed just by pressing the tire side surface with the conventional bead roller The bead cannot be peeled off alone.

[0007]

As described above, when the tire is detached from the wheel, there is a problem as described above. The problems to be solved by the present invention are these problems, and the tire bead portion fixed to the bead surface of the wheel can be separated to easily remove the tire. Provided is a disk tool for a tire attaching / detaching device that does not scratch the surface.

[0008]

The disk tool according to the present invention is not a substantially cylindrical type as shown in FIGS.
It has a disk shape. The outer shape is thin and sharp because of the disk shape, and it is shaped so that it can enter obliquely between the bead portion of the tire and the bead surface of the wheel. And in the present invention, the material of this disc tool is not steel,
It is made of resin. Therefore, when the disc tool enters between the tire bead portion and the wheel bead surface, the disc tool is not scratched even if it comes into contact with the wheel surface. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0009]

FIG. 1 is an embodiment showing a disk tool according to the present invention, and the material is a disk type using resin. The disk tool 1 is rotatably supported at the tip of an arm 2 and has a thin and sharp outer periphery. FIG. 2 is a specific example showing a tire attaching / detaching apparatus to which the disk tool 1 is attached. The basic operation for attaching / detaching the tire is the same as that of the conventional one.

A wheel 4 is attached to the main shaft 3 and rotates. The disk tool 1 attached to the tip of an arm 2 extending from a moving table 6 which moves along a guide rail 5 hits a tire 7. The tire bead portion 8 can be separated from the bead surface 9. The tire 7 is removed from the wheel 4 in a state where the bead portions 8 on both sides are separated from the bead surfaces 9, 9. The tire 7 is removed by pressing the same disk tool 1 against the tire side surface while rotating the tire. Or a conventional bead roller can be used.

In the case of an aircraft tire, since the wheels are of a mating type, after separating the two bead portions 8, 8 from the bead surfaces 9, 9, the wheel 4 is separated into two. The tire 7 can be removed. FIG. 3 shows a case where the tire bead portion 8 is separated from the bead surface 9 by using the disk tool 1 of the present invention.

Since the disk tool 1 is of a disk type, it can enter between the bead portion 8 and the bead surface 9 of the wheel, and the disk tool 1 that has entered can move along the bead surface 9 of the wheel. In addition, the tire bead portion 8 can be forcibly separated. After the bead portion 8 on one side is peeled off, the other bead portion 8 is peeled off, and the tire 7 is removed in a state where the bead portions 8 are separated from the bead surfaces 9. As shown in the figure, the disk tool 1 moves close to the wheel surface, and at this time, even if the disk tool 1 comes into contact with the wheel surface, the disk tool 1 is made of resin, so that the wheel 4 is scratched. Will not be attached.

The tire 7 from which both the bead portions 8 are peeled off easily from the wheel 4. However, in the case of a split-type wheel for an aircraft, the tire can be removed by separating the wheel, so that a truck or bus can be removed. In the case of a tire for a large vehicle such as the one described above, the tire can be rotated and removed while pressing the tire side surface using the same disk tool 1. Alternatively, a conventional bead roller may be used.

The disk tool 1 of the present invention has a disk shape, has a thin and sharp outer periphery, and is rotatably supported at the tip of an arm. The following effects can be obtained.

[0015]

The disk tool of the present invention is disk-shaped and has a thin and sharp outer periphery. Therefore, when the tire is removed from the wheel, the disc tool can be inserted between the bead portion of the tire and the bead surface of the wheel to separate the bead portion fixed to the bead surface. In particular, in the case of an aircraft wheel, the tire bead portion is seized on the bead surface due to heat generated at the time of landing, but the seized bead portion can be separated from the bead surface by using the disc tool of the present invention. Since the disc tool is made of resin, it does not scratch even if it comes into contact with the wheel when entering between the tire bead portion and the bead surface.

[Brief description of the drawings]

FIG. 1 is a disc tool of a tire mounting / dismounting device according to the present invention.

FIG. 2 is a tire attaching / detaching device on which a disk tool is mounted.

FIG. 3 shows a case where a disc tool separates a tire bead portion from a bead surface.

FIG. 4 is a tire attaching / detaching device equipped with a bead roller.

FIG. 5 shows a case where a bead roller presses a tire side surface.

FIG. 6 shows a case where a bead roller presses a tire side surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc tool 2 Arm 3 Main shaft 4 Wheel 5 Guide rail 6 Moving table 7 Tire 8 Bead section 9 Bead surface

Claims (2)

[Claims] 1. A tool mounted on a tire attachment / detachment device for separating a bead portion of a tire from a wheel bead surface, wherein the tool has a disk shape and has a thin and sharp outer periphery. A disc tool for a tire mounting / dismounting device, characterized in that the disc tool is rotatably supported by a tip of an arm extending from a moving table and is made of resin. 2. A disc tool for a tire mounting and dismounting device according to claim 1, wherein one side of the outer periphery is inclined to form a substantially frustoconical disk.