JP2001105815A - Tire removal method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire removal method suitable to remove a tire from a wheel. SOLUTION: In this method for inserting a tire lever 16 between a tire bead 20 and a rim flange of a wheel and removing a tire from the wheel, the tire bead 20 in a nearly opposite position to an insertion position of the tire lever 16 is dropped into a drop center of the wheel while pressing the side face of the tire in that position and pressing the travel surface of the tire. In that state, the tire lever 16 inserted between the tire bead 20 and the rim flange of the wheel is raised, and the tire is removed from the wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire removing method suitable for removing a tire from a wheel and a tire removing device used in the method.

[0002]

2. Description of the Related Art An operation of removing a tire from a wheel using a conventionally known tire changer will be briefly described with reference to the drawings. First, the configuration of a conventional tire changer will be described with reference to FIG. 5. In the figure, 1 is a mounting head, 2 is a set screw, 3 is a swing arm, 4 is a spindle lock lever, 6 is a mast, and 7 is a tire cream. Holder, 8A is a wheel mounting table,
8 is a clamping jaw and slide shoe, 9 is a tire lever, 9a is a tire break rubber pad, 10 is a drive pedal, 11 is a clamping pedal, 12 is a bead break pedal, 13 is a body frame, 14 is a bead break arm, and 15 is a bead break arm. These are bead break shoes, which are assembled as shown in the illustration.They are widely used at tire stores to remove tires from wheels or to install new tires on wheels. It is used.

In this tire changer, in order to replace a tire, a so-called bead dropping operation for separating a tire bead in close contact with a rim flange of a wheel is first performed. This bead dropping is performed by stabilizing the tire by applying the wheel to the tire break rubber pad 9a of the tire changer with the air in the tire being evacuated, and then operating the bead break arm 14 to remove the bead break shoe 15 (not shown). Inserted between the bead of the tire and the rim flange of the wheel, the operator presses the bead break arm 14 to operate the bead breaker air cylinder by pedal operation, and the bead break shoe 15
The tire bead and the rim flange are separated while being inserted between the rim flange and the tire bead.

[0004] Next, the bead-dropped wheel is mounted on a wheel mounting table 8A of a tire changer and fixed with clamping jaws 8, and the position of the mounting head 1 is adjusted with respect to the fixed tire, as shown in FIG. Tire lever 16 on the nose of mounting hend 1
The upper bead 20 of the tire is lifted while raising the tire bead 2 from the rim flange 18a of the wheel.
Remove 0. At this time, in order to facilitate the lifting of the tire bead, as shown in FIG. 6, the side surface of the tire on the opposite side of the mounting head 1 is pressed by upper pressing means 21 (not shown in FIG. 1) such as a roller. The tire bead 20 is pushed down to drop the tire bead 20 into the drop center 19 of the wheel, and the tire is removed from the wheel by the mounting head 1 while rotating the tire in this state.

[0005] By the way, recent tires have a large flatness and extremely high rigidity on the side surfaces of the tire.
By simply pressing the side of the tire on the opposite side of the mounting head downward by the upward pressing means 21 as shown in FIG.
The tire is not deformed, and the tire bead 20 cannot be easily dropped into the drop center 19 of the wheel.
For this reason, even if the tire lever 16 is hooked to the tire bead 20 and raised, the tire bead on the opposite side hits the wheel and cannot be lifted upward.
It was difficult to remove the tire from the wheel.

Accordingly, the present invention provides a method for pressing a tire side surface, which is substantially opposite to a tire lever insertion portion, with an upward pressing portion and pressing a tire running surface with a lateral pressing portion when removing a tire from a wheel with a tire lever. Thus, the tire bead portion on the side opposite to the tire lever side is dropped into the drop center of the wheel, and a tire removing method and an apparatus therefor that can easily remove the tire from the wheel by the tire lever are provided, and the above problem is solved. The purpose is to:

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for removing a tire from a wheel by inserting a tire lever between a tire bead and a rim flange of a wheel, the method comprising: While pressing the side of the tire and pressing the running surface of the tire, the tire bead at that position is dropped into the drop center of the wheel, and the tire lever inserted between the tire bead and the rim flange of the wheel is raised in this state. A tire removal method characterized in that the tire is removed from the wheel by removing the tire from the wheel, and in a tire changer that detaches the tire from the rim of the wheel, the tire changer includes a mounting head, and an upper pressing unit that presses a side surface of the tire, It is characterized by having lateral pushing means capable of pushing the running surface of the tire. A tire removing device, wherein the upward pushing means and the lateral pushing means are a tire removing apparatus characterized by having a flat pressing portion, wherein the upward pushing means comprises a roller, The lateral pushing means is a tire removing device characterized by being constituted by a band, and these are means for solving the problem.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a tire removing device according to the present invention; FIG. 2 is a plan view of the lateral pushing device, FIG. 3 is a side view of the lateral pushing device, and FIG. 4 is a perspective view of a main part of the lateral pushing device.

In FIG. 1, a clamping jaw 8 for fixing a wheel of a tire 30 is arranged on a conventionally known wheel mounting table 8A as in the prior art. Mounting table 8
Above A, a conventionally known mounting head 1 and a tire upward pressing device 21 (an upward pressing means including a roller or the like) are arranged. This tire pushing device 21
It is attached to a support member such as a mast 6 shown in FIG. 5 by appropriate means, and is configured to be movable between a position above the tire and a retracted position. In addition, upper pushing device 2
1 is provided with a driving means (not shown) for pressing the side surface of the tire 30 downward in the drawing (b). The upper pressing device is not limited to the roller as described above, but may be a flat pressing member as long as it has a function of pressing the tire. Note that the upward pushing device is the same as that provided in a conventionally known tire changer, and is not a feature of the present invention, and thus detailed description is omitted.

The tire changer is provided with a lateral pushing device (lateral pushing means) for pushing the running surface of the tire in addition to the above pushing device. This lateral pushing device 31
A includes a roller 31 for pressing the running surface of the tire 30 and an arm 32 for supporting the roller as shown in the figure, and the end of the arm 32 has a hinge 3 with a lock as shown in FIG.
3 pivotally attached to the first operating member 34a,
The operating member 34a is, as shown in FIG.
b is connected with a pin 35. Second operating member 3
4b is formed in a U-shape as shown in the figure, and is formed so as to be able to sandwich the first operating member 34a therein. If such a connecting mechanism has the same function, for example, the second operating member 34a is formed. The operating member 34b can adopt various forms such as being formed on only one side. Further, if necessary, the first operating member 34a and the second operating member 34b can be formed integrally.

The second operating member 34b is slidably held on a support member 36 on which the wheel mounting table is appropriately fixed by means of an alligator. The second operating member 34b is disposed between the second operating member 34b and the support member 36. Is provided with a driving means 37 such as an air cylinder. The arm 32 is attached so as to be swingable up and down in FIG. 2 around the hinge 33 with the lock. For this reason, the pressing roller 31 can move to a position for pressing the running surface of the tire and a position for retracting from the pressing position.
The operating member and the first operating member move rightward in FIG. 2, whereby the arm 32 moves and the pressing roller 31 can press the tire running surface. The lateral pressing device is not limited to the roller as described above, and a flat pressing member may be used as long as it has a function of pressing the tire.

The operation of the above tire removing device will be described. The bead-dropped wheel is placed on the tire mounting table 8A as shown in FIG. 1 (a), and the upper pushing means 21 (upward pushing roller) faces the side of the tire. Then, the arm 32 is swung to make the lateral pushing means 31 (lateral pushing roller) attached to the arm 32 face the running surface. Thereafter, when the upper side pushing roller 21 is lowered by using the driving means and the cylinder side of the lateral pushing roller 31 is operated to press the tire side surface and the running surface, as shown in FIG. Falls into the drop center 19. When the upper bead 20 of the tire 30 is lifted by using the tire lever 16 at the nose portion of the mounting head 1 in this state, the tire bead 20 opposite to the tire lever 16 is dropped into the drop center 19 of the wheel. Since the bead 20 can be easily lifted, the tire 30 can be easily removed from the wheel. The pressing force of the upper pressing roller 21 and the pressing force of the lateral pressing roller can be appropriately adjusted as needed.

As described above, according to the present invention, when the tire is removed, the tire side surface opposite to the tire lever insertion portion and the tire running surface are simultaneously pressed, and the tire bead portion opposite to the tire lever side is dropped on the wheel. Since the tire can be dropped into the center, the tire lever can be easily raised, and the tire can be easily removed from the wheel.

In the above embodiment, the cylinder is used as the driving device of the lateral pushing device. However, if the lateral pushing force can be applied, a screw rod may be used instead of the cylinder, or a band surrounding the tire may be used. A suitable mechanism such as a mechanism can be used, and the pressing force can be appropriately adjusted by operating means (not shown) including manual operation. In addition, the present invention can be embodied in other various forms without departing from the spirit or main features thereof, and the above-described embodiments are merely exemplifications in all respects, and Not be.

[0015]

As described in detail above, according to the present invention,
When removing the tire from the wheel using a conventionally known tire changer, the tire bead portion can be dropped into the drop center of the wheel by pressing the tire side surface and the tire running surface opposite to the tire lever insertion portion. Thus, the tire lever can be easily caused, and the tire can be easily removed from the wheel, which is an excellent effect.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a tire removing device according to the present invention and an explanatory diagram when a tire is removed.

FIG. 2 is a plan view of the lateral pushing device.

FIG. 3 is a side view of the lateral pushing device.

FIG. 4 is a perspective view of a main part of the lateral pushing device.

FIG. 5 is a configuration diagram of a conventional tire changer.

FIG. 6 is an explanatory view of a conventional tire removal.

[Explanation of symbols]

 8A Wheel mounting table 16 Tire lever 19 Drop center 20 Upper bead 21 Tire pushing device 30 Tire 31A Tire lateral pushing device 31 Roller 32 Arm 33 Locked hinge 34 First operating member 35 Second operating member 36 Supporting member 37 Drive means

Claims (4)

[Claims] 1. A method of inserting a tire lever between a tire bead and a rim flange of a wheel and removing the tire from the wheel, wherein a side of the tire substantially opposite to a position where the tire lever is inserted is pressed, and The tire bead at that position is dropped into the drop center of the wheel while pressing the running surface, and in this state, the tire lever inserted between the tire bead and the rim flange of the wheel is raised to remove the tire from the wheel. Tire removal method. 2. A tire changer for attaching and detaching a tire to and from a rim of a wheel, wherein the tire changer includes a mounting head, an upper pressing means for pressing a side surface of the tire, and a lateral pressing means for pressing a running surface of the tire. A tire removing device, comprising: 3. The tire removing device according to claim 2, wherein said upper pushing means and said lateral pushing means have a flat pressing portion. 4. The tire removing device according to claim 2, wherein said upper pushing means is constituted by a roller, and said lateral pushing means is constituted by a band.