JP2000025431A - Auxiliary jig for fitting tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an inserted bead section from being removed by fitting one end to the center axis section of the wheel fixing section of a chuck, and bringing the other end into contact with the lug section of a wheel, inserting the bead section into the wheel while partially pressing it to a bead roller, putting the other end of an auxiliary tool on the wheel, and rotating the wheel by about one rotation. SOLUTION: A fitting section 1 is inserted and fitted into the hole of a pipe 6 horizontally extending from the center of a chuck base section 7, and multiple pawls 8 can be opened or closed around the chuck base section 7. The rubber plate 5 of a contact section 2 formed at the other end of an auxiliary tool fitted to the chuck base section 7 is kept in contact with the lug section 10 of a wheel 9. The contact section 2 is pressed by a bead roller 12 and arranged near the place where a bead section 13 is inserted, and the wheel 9 is rotated by about one rotation. A tire 11 is pressed by the contact section 2 and is not removed from the lug section 10 of the wheel 9 when it is separated from a bead roller 12, and the tire 11 is completely fitted to the wheel 9 via about one rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire mounting aid which can be easily mounted on a tire by attaching the same to a tire attaching / detaching device.

[0002]

2. Description of the Related Art There are various types of tire attachment / detachment devices. FIG. 6 shows the most typical tire attachment / detachment device.
The tire can be attached or detached while the tire (a) is standing upright, and the device has an arm (c) for supporting the wheel (b), and the arm (c) is provided at an end of the arm (c). Is the wheel
The tire (a) which has a chuck (d) for gripping (b) and is rolled and transported to a predetermined position is clamped by the chuck (d) and lifted in that state. The chuck (d) has a plurality of claws, and each of the claws expands to clamp the wheel (b). The lifting of the tire (a) is performed by the swing of the arm (c). The tire (a) is rotated in the lifted state, and a bead roller (e) is pressed from the side.

FIG. 1 shows a case where a bead roller (e) is located on a chuck (d) side and a tire (a) is removed from a wheel (b).
Pressing (e) releases the tire (b) from the wheel (b). Conversely, when mounting the tire (a) on the wheel (b), the bead roller (e) must be located on the opposite side (opposite to the chuck) and the side surface of the tire (a) must be pressed.

In this case, the tire bead portion on one side can be relatively easily fitted simply by rotating while being pressed by a bead roller, while the tire bead portion on the other side is rotated while being pressed by the bead roller (e). It is hard to fit on the wheel just by doing. That is, the tire inner diameter is the wheel
(B) may be smaller than the outer diameter of the ear, and the tire bead on one side may be fitted and constrained by the bead on the wheel. Also, if the tire rotates and separates from the bead roller (e), it will come off again.

[0005] Therefore, in the prior art, the worker manually puts the tire bead portion pressed once by the bead roller (e) so that the tire bead portion once fitted and separated from the bead roller (e) with the rotation of the tire does not come off the wheel (b) again. While holding down the tire (a)
Is turning. In fact, such an operation is extremely labor intensive and requires skill.

[0006]

As described above, the tire attaching / detaching device has the above-mentioned problems. The problem to be solved by the present invention is this problem. An object of the present invention is to provide a tire mounting aid which prevents a tire bead portion fitted and pressed by a bead roller from coming off.

[0007]

SUMMARY OF THE INVENTION A tire mounting aid of the present invention is pressed by a bead roller to press a tire bead portion fitted on a wheel so as not to come off again. When mounting the tire, the tire bead part on one side can be fitted to the wheel just by pressing while rotating the tire with a bead roller without using this auxiliary tool, but the tire bead part on the other side is a bead roller This assisting tool is used because even if it is pressed and fitted, it will come off again by separating from the bead roller.

The auxiliary tool has a substantially L-shape, one end of which is attached to the center shaft of a wheel fixing portion such as a chuck, and the other end of which is in contact with the ear of the wheel. Therefore, a part of the tire bead portion is fitted to the wheel while being pressed by the bead roller, and the other end of the assisting tool is attached to this portion. If the tire is rotated about one turn while being pressed by the auxiliary tool so that this portion does not come off the wheel, the entire circumference of the tire bead portion will fit on the wheel.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The auxiliary tool of the present invention has a substantially L-shape, one end of which is attached to a chuck center shaft, and the other end of which is in contact with or close to a wheel ear. It can turn with rotation. Therefore, the assisting device is provided with a torque transmitting means so that the assisting device can turn in synchronization with the fixed portion such as the chuck and the wheel. As a method, one end of the assisting device has a detent function such as a polygonal cross section. It has a cross-section, and a fitting hole having the same cross-sectional shape is provided in the center shaft portion of the chuck or the like. In the case of a circular cross section, an arm that locks to a chuck or the like is provided,
The torque may be transmitted via the arm.

[0010] On the other hand, the other end of the wheel, which corresponds to the ear, is provided with rubber or resin so that the wheel is not scratched. Furthermore, the turning means of the auxiliary tool is not limited to transmitting the torque when the fixed part such as the chuck rotates, but it can be configured to turn in synchronization with the wheel by providing its own motor. It is. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0011]

FIG. 1 shows an embodiment of a tire mounting aid according to the present invention. The auxiliary tool has an L-shape as shown in the figure, and one end forms a mounting portion 1 and the other end forms a contact portion 2. The mounting portion 1 has a circular cross-section, and has an arm 3 attached to a predetermined position from the tip, and the arm 3 can swing through a shaft 4. A rubber plate 5 is provided on the contact portion 2 at the other end.

FIG. 2 shows a state in which the auxiliary tool is mounted on the chuck A, and the mounting portion 1 is mounted by fitting into a hole of a pipe 6 extending horizontally from the center of the chuck base 7. A plurality of claws 8, 8 are provided around the chuck base 7.
Are mounted so that they can be opened and closed, but the tip of the arm 3 provided in the auxiliary tool can be locked to the claw 8. Therefore, the rotation of the chuck A causes the wheel 9 to rotate.
Rotates, and at the same time, the auxiliary tool can turn at the same speed.

The auxiliary tool attached to the chuck base 7 is formed at the other end.
Abuts or is close to the ear 10. When the tire 11 is mounted on the wheel 9, the tire bead 13 is pressed by the bead roller 12 and fits on the ear 10.
The tire bead portion 13 once fitted is pressed by the contact portion 2 of the auxiliary tool so as not to come off the ear portion 10 again.

Here, the contact portion 2 includes the tire bead portion 1
The force is exerted when the wheel 3 is disengaged from the wheel, but the auxiliary tool does not fall out of the pipe 6. The mounting portion 1 is merely fitted in the hole, but the tire bead portion 1
The pressing force of the detachment 3 acts on the auxiliary tool, and a bending moment is generated in the attachment portion 1 so that the attachment portion 1 does not come out of the hole.

The assisting tool is arranged such that the contact portion 2 is pressed by the bead roller 12 near the tire bead portion 13 and the wheel 9 rotates about one revolution. Since the tire 11 is pressed by the contact portion 2, it does not come off the ear 10 of the wheel even when it is separated from the bead roller 12, and the tire 11 is completely mounted on the wheel by making one rotation.

By the way, the auxiliary tool of the present invention presses the portion fitted to the wheel by being pressed by the bead roller 12 so as not to come off again. There are various mounting modes of the auxiliary tool, and the auxiliary tool is limited to the case shown in FIG. do not do. FIG. 3 shows a state in which the arm 3 is fitted to the round hole of the pipe 6 and is attached to the claw 8 as a means for transmitting rotational torque.
The arm 3 is not required if the hole is formed in a square cross section as shown in FIG. Similarly, the key groove 14 may be formed on the inner periphery of the hole as shown in FIG.

On the other hand, FIG. 2 shows a case in which an auxiliary tool is attached to the base 7, but such an auxiliary tool may not be attached to the chuck. In such a tire attaching / detaching device, the auxiliary tool can be attached to another member. FIG. 5 shows an embodiment in which the auxiliary tool is attached to the main shaft of a motor 16 provided at the tip of another arm 15. This arm 15 can swing in the same manner as the arm (c) shown in FIG. 6, and the distance from the swing axis to the motor is the same as the distance to the chuck A. By matching the angles, the pivot axis of the assisting tool and the chuck center axis match.

A socket 17 is attached to the main shaft of the motor 16, and a square hole or a hole having a key groove is formed in the socket 17 as shown in FIG. By doing so, you can rotate in synchronization with the rotation speed of the wheel. Further, the mounting portion 1 is not limited to the case where it is fitted in the hole, and may be provided with a flange at the tip and screwed. As described above, the auxiliary tool of the present invention has a substantially L-shape, one end of which is a mounting portion, and the other end of which is a contact portion, and the following effects can be obtained.

[0019]

The assisting tool of the present invention has a substantially L-shape. The attaching portion at one end is attached to the rotating portion, and the contact portion at the other end can contact the ear of the wheel. Therefore, the tire bead portion is pressed by the bead roller and the auxiliary tool of the present invention is attached in a state where the tire bead is partially fitted to the wheel, and the tire bead portion is pressed by the contact portion, and the wheel and the tire are rotated about one turn in this state. Thus, the tire bead portion once fitted can be mounted on the tire without coming off the wheel. The auxiliary tool according to the present invention has a substantially L-shape, and is simply attached to a pipe provided at the base of the chuck, so that the mounting method and the removing method are very simple.

[Brief description of the drawings]

FIG. 1 is an embodiment showing a tire mounting aid of the present invention.

FIG. 2 is a use state in which an auxiliary tool is attached to a chuck.

FIG. 3 is a cross-sectional view in which an auxiliary tool is fitted to a pipe at a chuck base.

FIG. 4 is a specific example of a pipe hole into which a mounting portion of an auxiliary tool fits.

FIG. 5 is another form in which an auxiliary tool is attached.

FIG. 6 shows a tire attaching / detaching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting part 2 Contact part 3 Arm 4 Axis 5 Rubber plate 6 Pipe 7 Base 8 Claw 9 Wheel 10 Ear part 11 Tire 12 Bead roller 13 Tire bead part 14 Key groove 15 Arm 16 Motor 17 Socket

Claims (3)

[Claims] 1. A tire attachment / detachment tool used in an apparatus for attaching / detaching a tire by fixing a wheel to a tip of an arm swinging up and down and pressing a bead roller against a tire side or a tire bead portion. The tool has a generally L-shape, one end of which is a mounting portion, and the other end of which is a hitting portion. The mounting portion is attached to a rotating portion which rotates in synchronization with the rotation of the wheel, and the hitting portion is the ear of the wheel fixed to the arm. A tire mounting aid, wherein a tire bead portion which is in contact with or close to a portion and which is pressed and fitted by a bead roller does not come off from an ear portion. 2. A tire attachment / detachment tool for use in an apparatus for attaching / detaching a tire by fixing a wheel to a tip of an arm swinging up and down and pressing a bead roller against a tire side or a tire bead portion. The tool is roughly L-shaped, one end is a mounting part, the other end is a contact part, and an arm is swingably mounted near the mounting part, so that it fits into the pipe hole provided in the base where the wheel is fixed. At the same time, the arm is locked by a claw or the like so as to rotate with the wheel, and the abutment comes into contact with or close to the ear of the wheel fixed to the arm, and the tire bead pressed by the bead roller and fitted from the ear. A tire mounting aid characterized in that it does not come off. 3. The tire mounting aid according to claim 1, wherein the contact portion is provided with a rubber plate or a resin plate so as not to scratch the ears of the wheel.