JPH09123717A - Tire mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a soft tubeless tire to be smoothly attached and removed by mounting a tire rotation assisting device in the position of a tire mounting device which is opposite to a main body via a stud, and causing a pressing piece at the end of an arm provided at the assisting device to be pressed against the tire. SOLUTION: To attach a tire to a wheel 5, it is fitted around the wheel 5 as its side face is pressed by a bead roller 8a attached to a moving base 7. In this case, to prevent one side of the tire 16 from being disconnected from the wheel 5 by pressing the opposite side, the side of the tire is held by the roller of a pushing device 13. However, the tire 16 pressed has its bead part on one side fitted around the wheel but the bead part on the opposite side is not easily fitted. Therefore a tire rotation assisting device 14 is attached and rotated together with the tire 16 as it is pressed by an arm 24 so that the tire 16 fitted around the wheel 5 is not disconnected from the wheel when separated from the bead roller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for more efficiently attaching and detaching a tire.

[0002]

2. Description of the Related Art There are various types of tire attaching / detaching devices, but basically, a bead roller is configured to be pressed against a side surface of a tire and a bead portion while a wheel is attached to a main shaft and rotated. There is. FIG. 8 is a specific example showing a conventional tire attaching / detaching device.

This tire attaching / detaching device has a main body on the base (a).
(B) is installed upright, and the main shaft (d) with the mounting board (c) that fastens the wheel to the main body (b) fixed to the tip is mounted horizontally,
The guide rails (e) and (e) are provided on the base in parallel with the main shaft (d), and the guide rails (e) and (e) are provided with a moving table (e)
Is slidably attached via a feeding device, and a bead roller (g) that can be expanded and contracted by a handle operation on the moving table.
(G) is attached and an elevating device (h) is attached, and two supporting rollers (n) and (n) are attached to the main shaft (n) on the elevating table (l) that moves up and down by the elevating device (h). ), And symmetrically with respect to a vertical plane including the center of the main axis, and the operation part for controlling the device is of a pedal type, and the pedal is the main body (b) with the lifting table (li) in the middle. It is located on the side opposite to.

By the way, this tire attaching / detaching device is provided with two bead rollers (g) and (g). When the tire is attached, the left bead roller is used and when the tire is attached, the bead roller is attached. Use the right bead rollers respectively. Basically, these bead rollers enable the tires to be attached and detached. However, in recent tubeless type soft tires, it is not easy to attach and detach by simply pressing the tire side faces with the bead rollers. Since the tire will be damaged if it is pressed and operated forcibly, an auxiliary device for assisting the attachment / detachment is required in addition to the bead roller.

[0005]

As described above, the conventional tire attaching / detaching device has the above-mentioned problems. The problem to be solved by the present invention is this problem, and provides a tire attaching / detaching device capable of smoothly performing an attaching / detaching operation even with a soft, cheveless tire.

[0006]

The tire attaching / detaching machine of the present invention is provided with a tire pushing device and a tire rotation assisting device, and smoothly installs and removes the tire. That is, since the tubeless tire is soft and cannot enter the wheel only by the conventional bead roller, the tire pushing device presses the tire side surface and the tire bead portion. Further, a tire rotation assisting device that rotates while pressing the tire side surface is provided so that the tire fitted into the wheel by the bead roller does not come off the wheel again.

Here, the tire pushing device is arranged so as to face a mounting tool for mounting a wheel, and its height can be adjusted. Then, it is slid by the cylinder and pressed against the side surface of the tire. The tire is provided with a roller at its tip so as not to hinder the rotation of the tire while being pressed for rotation. In the pushing device, rollers may be attached to both sides of a pressing plate which is arcuate and curved, and the protruding positions of both rollers in this case are different.

One of the tire rotation assisting devices also presses the side surface of the tire, but unlike the above-mentioned pushing device, it can rotate with the tire while pressing the tire. That is, the swingable arm is extended around the axis, and the tip of the arm abuts against the side surface of the tire and presses it. Of course, the axes can be slid horizontally by cylinders provided in parallel. By the way, the swing of the arm is rotationally driven according to the rotation of the tire.

[0009]

As described above, the tire attaching / detaching device of the present invention is equipped with the tire pushing device and the tire rotation assisting device, and the tire attaching / detaching operation can be carried out without forcing the tire. That is, when the tire is removed from the wheel, the side surface of the tire is pressed by the bead roller, and the opposite side surface of the tire is pressed by the roller of the tire pushing device to drop the bead portion into the drop portion of the wheel. Therefore, the tire is removed without difficulty.

On the contrary, when the tire is mounted on the wheel, the bead roller presses the side surface of the tire, and further the roller of the tire pushing device is pressed against the side surface of the tire to rotate. One bead portion can be fitted into the wheel by this method, the other bead portion is pressed by the bead roller, and the arm of the tire rotation assist device is brought into contact with the side surface of the tire to swing with rotation of the tire. Therefore, the tire bead portion once fitted into the wheel can be easily mounted without coming off. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 show a tire attaching / detaching device of the present invention, which is equipped with a tire pushing device and a tire rotation assisting device. Except for these devices, the basic structure is the same as the conventional tire attaching / detaching device. That is,
A main body 2 is erected from the base 1, a main shaft 3 is horizontally attached to an upper end portion of the main body 2, and an attachment tool 4 for holding a wheel 5 is provided at a tip end of the main shaft. Unlike the mounting board shown in FIG. 8, the mounting tool 4 has a structure in which the tip claw is opened and closed by a link mechanism to chuck the wheel.

Two guide rails 6 and 6 are horizontally arranged on the base 1, and a movable table 7 can be placed on the guide rails 6 and 6 to slide on the movable table 7. Two bead rollers 8a and 8b are attached. The bead roller 8 is provided at the tip of a roller shaft that is axially supported by the moving table 7. The roller shaft can be reversed in a direction perpendicular to the guide rail 6, and can be expanded and contracted in a stepwise manner in the axial direction. Has become.

An elevating device 9 is mounted on the moving table, and the elevating device 9 is provided with an elevating table 11 which is moved up and down by a cylinder 10. Two support rollers 12a and 12b are horizontally attached to the tip of the lift table 11 with a predetermined space therebetween, and the tire is mounted on the support rollers 12a and 12b and lifted up to be attached to the fixture 4. To be

By the way, reference numeral 13 in the figure denotes a tire pushing device, and 14 denotes a tire rotation assisting device. Both of these devices are attached to the upper end of a stud 15 arranged at a position facing the main body 2 and play an auxiliary role during the tire attaching / detaching operation, so that the tire can be attached / detached efficiently.

FIGS. 4 (a) and 4 (b) show how the pushing device is used. FIG. 4 (a) shows the case where a tire is mounted on the wheel 5, and the wheel is pressed while pressing the side surface with the bead roller 8a. Fit in 5. Here, the wheel 5 is attached to the fixture 4, and one tire 16
Is mounted on the lift table 11 and is supported at a predetermined height. The tire 16 is mounted on the support rollers 12a and 12b while being rotated together with the wheel 5 by being pressed by the bead roller 8a. Then, pressing one side of the tire 16 causes the other side to be disengaged from the wheel 5. Therefore, in order to prevent the disengagement, the pushing device of the present invention presses the tire side surface.

A roller 17 is attached to the tire pushing device 13 and presses the rotating tire 16 through the roller 17. FIG. 5 is a specific example of the tire pushing device 13, in which the pressing plate 18 is curved in an arc shape and rollers 17a and 17b are provided on both sides. And roller 1
The protrusion amount of 7b is larger than the protrusion amount of the roller 17a,
It is possible to press the tire 16 in an inclined state during the mounting process with both rollers 17a and 17b. The holding plate 18 is guided by a guide shaft 19 so as to be slidable, and is pressed by a cylinder 20.

However, the tire 16 pressed by the roller 17 of the pushing device 13 has the bead portion 2 on one side thereof.
1a is fitted into the wheel, but the bead part 2 on the opposite side
1b is hard to fit. That is, when the bead portion 21a on one side is fitted to the wheel 5, the bead roller 8a and the roller 17 of the pushing device 13 are pressed against the tire side surface to fit the bead portion 21b on the opposite side. Cannot follow the rotation of the wheel, and the wheel 5 spins idle.

In the prior art, the bead portion 21 once pushed by the bead roller 8a by the operator manually pressing the side surface of the tire.
Rotate with the wheel with b not to come off. In the present invention, the tire rotation assist device 14 is used instead of this. FIG. 6 is a specific example showing a tire rotation assisting device, in which the holding plate 22 slides while being guided by the guide shafts 23, 23, and the arm 24 is swingably attached to the holding plate 22. . The size of the swing angle θ of the arm 24 is not particularly limited, but the position near the bead roller 8a is the start position a and the position b is the end point. Therefore, the arm 2 is prevented so that the tire 16 fitted into the wheel 5 due to the pressing of the bead roller 8b does not come off the wheel by being separated from the bead roller 8a.
It rotates with the tire 16 while pressing at 4.

As shown in FIG. 7, a pushing piece 25 is provided at the tip of the arm 24, and the pushing piece 25 hits the tire bead and pushes it. By the way, the arm 26 is extended to one side of the pressing plate 22, and the rack cylinder 27 is attached to the end of the arm. A rack 28 is connected and extends to the piston rod of the rack cylinder 27, and meshes with a pinion 29 attached to the holding plate 22. The arm 24 is attached to the tip of the pinion 29.
The pinion 29 can rotate if the rack 28 slides due to the operation of the rack cylinder 27 because the rack is attached.

Therefore, the pressing piece 25 is applied to the tire bead and the rack cylinder 27 is driven to drive the tire 1
Rotate with 6. When returning the arm 24 rotated from the starting point a to the ending point b to the original starting position a, the rack cylinder 27 is driven to slide the rack 28 to the original position. In this case, the tire 16 is pressed by the cylinder. Here, the tire pushing device and the tire rotation assist device are generally mounted on the tire attaching / detaching machine at the same time, but sometimes only one of them is used.

FIG. 4B shows the case where the tire 16 mounted is removed from the wheel 5. In this case, the bead roller 8b on the opposite side is used to press the side surface of the tire. At the same time, the pushing device 13 presses the opposite side surface of the tire 16 to drop the bead portion 21b into the drop of the wheel 5. By dropping the bead portion 21b, the tire 16 can be removed from the wheel 5 without forcing. Once one of the bead portions 21b has come off, the other bead portion 21a can come off relatively easily.

By the way, this tire attaching / detaching machine is provided with a centering device. The centering device is a device that allows the tire mounted on the lift 11 to be accurately lifted to a required height and easily attached to the fixture 4. In the past, the lifting height was visually determined, but this inevitably caused variations in height, which hindered wheel mounting and tire mounting.

The centering device 30 has a main body 31 that can slide in the horizontal direction. A guide rod 33 is attached to the support pieces 32a and 32b of the main body 31, and a slider 34 is attached to the tip of the guide rod 33. Is attached so that it can slide vertically. The arm 35 extends horizontally from the slider 34, and a contact portion 36 is formed at the tip. Therefore, if the main body 31 is moved by the operation of the air cylinder 37, the contact part 36 may move to the lift table 11.
Contact the inner surface of the tire wheel on the. In this case, the slider 34 is pushed up to set the position of the wheel in the height direction, and the height is detected to detect the height of the lift table 11.
Find the climb distance of. As described above, the tire attaching / detaching device of the present invention includes the tire pushing device or the tire rotation assisting device, and can obtain the following effects.

[0024]

Since the tire attaching / detaching device of the present invention is provided with the tire pushing device, the bead portion of the tire is pressed by the bead roller so that the side surface of the tire is pushed by the bead roller and the opposite side is pushed by the roller of the pushing device. It can be removed easily by dropping it on the drop without damaging the tire. Of course, there is no problem even with tubeless tires that are soft in recent years.

On the other hand, when the tire is mounted on the wheel, the side surface of the tire is pressed by the bead roller and
By pressing the roller of the pushing device to the side of the tire, one bead part fits on the wheel, and when the other bead is fitted, the arm end of the tire rotation assist device is pressed against the side of the tire and rocks as the tire rotates. Can be installed by That is, since the tire bead portion once fitted into the wheel by the bead roller rotates while being pressed by the pressing piece at the arm end, it cannot be separated from the wheel even if it is moved away from the bead roller.

Further, if the tire attaching / detaching machine is provided with a centering device, the height positions of the tires and wheels mounted on the elevator are determined, and the distance for lifting the elevator is calculated. Therefore, the wheel can be easily attached to the attachment, and the tire can be easily attached.

[Brief description of the drawings]

FIG. 1 is a front view of a tire attaching / detaching device of the present invention.

FIG. 2 is a plan view of the tire attaching / detaching device of the present invention.

FIG. 3 is a side view of the tire attaching / detaching device of the present invention.

FIG. 4 is a state of using the tire pushing device.

FIG. 5 is a front end portion of a tire pushing device.

FIG. 6 is a tire rotation assist device.

FIG. 7 is a detailed view of a tire rotation assist device.

FIG. 8 is a conventional example of a tire attaching / detaching device.

[Explanation of symbols]

 1 Base 2 Main Body 3 Spindle 4 Fixture 5 Wheel 6 Guide Rail 7 Moving Platform 8 Bead Roller 9 Lifting Device 10 Cylinder 11 Lifting Platform 12 Support Roller 13 Tire Pushing Device 14 Tire Rotation Assist Device 15 Stud 16 Tire 17 Roller 18 Presser Plate 19 Guide Shaft 20 Cylinder 21 Bead 22 Presser plate 23 Guide shaft 24 Arm 25 Pressing piece 26 Arm 27 Rack cylinder 28 Rack 29 Pinion 30 Centering device 31 Main body 32 Support piece 33 Guide rod 34 Slider 35 Arm 36 Contact part 37 Air cylinder

Claims (4)

[Claims] 1. A main body is erected on a base, and a main shaft having a mounting tool for attaching a wheel to the main body is horizontally provided on the base, and a guide rail is provided on the base parallel to the main shaft. A movable table is slidably attached to the movable table through a feeder, and a bead roller is mounted on the movable table. In a tire attaching / detaching device, a stud is erected at a position facing the main body and an upper end of the stud is attached. A tire rotation assisting device is attached to the tire rotation assisting device, and the tire rotation assisting device is provided with an arm that swings within a predetermined angle on a holding plate that slides horizontally along a guide shaft. A tire attaching / detaching device comprising a rotation driving device, a pressing piece formed at the tip of an arm, and a cylinder for pressing the pressing piece by hitting the tire. 2. The tire attachment / detachment according to claim 1, wherein a pinion is attached to the arm shaft as a rotation drive device for swinging the arm, and a rack reciprocally slid by a rack cylinder is engaged with the pinion. apparatus. 3. A main body is erected on a base, and a main shaft having a mounting tool for attaching a wheel to the main body is horizontally provided on the base, and a guide rail is provided on the base in parallel with the main shaft. A movable table is slidably attached to the movable table through a feeder, and a bead roller is mounted on the movable table. In a tire attaching / detaching device, a stud is erected at a position facing the main body and an upper end of the stud is attached. A tire pushing device and a tire rotation assisting device are attached to the tire pushing device, and the tire pushing device has a rotating roller at its tip to push the side surface of the tire, and the roller is attached to the holding plate and moves in the horizontal direction. Equipped with a cylinder for pressing,
One of the tire rotation assisting devices is provided with an arm that swings within a predetermined angle on a holding plate that slides horizontally along a guide shaft, a rotation drive device that swings the arm, and a tip end of the arm. Is a press-fitting piece, and the press-fitting piece is equipped with a cylinder for hitting and pressing the tire. 4. A main body is provided upright on a base, and a main shaft having a mounting tool for attaching a wheel to the main body is horizontally provided on the base, and a guide rail is provided on the base in parallel with the main shaft. A movable table is slidably attached to the movable table through a feeder, and a bead roller is mounted on the movable table. In a tire attaching / detaching device, a stud is erected at a position facing the main body and an upper end of the stud is attached. A tire pushing device and a tire rotation assisting device are attached to the tire pushing device, and the tire pushing device has a rotating roller at its tip to push the side surface of the tire, and the roller is attached to the holding plate and moves in the horizontal direction. Equipped with a cylinder for pressing,
One of the tire rotation assisting devices is provided with an arm that swings within a predetermined angle on a holding plate that slides horizontally along a guide shaft, a rotation drive device that swings the arm, and a tip end of the arm. Forming a pressing piece, which is provided with a cylinder for pressing the pressing piece against the tire, and further provided with a centering device for measuring the height of the tire wheel mounted on the lift, the centering device sliding horizontally. A tire attaching / detaching device characterized in that it has a slider that moves in the vertical direction, and an arm is extended to the slider, and a contact portion that contacts the inner peripheral surface of the wheel or the inner peripheral surface of the tire bead is formed at the tip. .