JPS59176107A - Equipment for dismounting tyre - Google Patents

Abstract

PURPOSE:To prevent an aluminum wheel from being damaged when a tyre is dismounted by forming a supporting shaft having a turning roller which makes contact with the external fringe of a rim and a roller which makes contact with the internal part of a tyre bead, at one end of a shaft part which is inserted between the rim and the tyre. CONSTITUTION:By separating a tyre bead part 31 from the retaining part 21 of a rim 2 by means by a tyre mounting and dismounting equipment 4, a gap is formed between the rim 2 and a tyre 3, and rollers 13 and 14 are thrusted into the gap. With the roller 13 in contact with the external fringe of the rim, a shaft part 11 is raised pivotally to the center of the rim until a longitudinal hole 17 makes engagement with the square shaft part 44 of a driving shaft 43. The internal fringe 31 of the tyre bead part is thereby mounted on the roller 14 and brought outside of the rim 2 to make engagement with a flange 15 so that the roller 13 is urged against the external peripheral part of the rim 2. Even if the dismounting equipment 1 may be turned along the external periphery of the rim company with turning of the driving shaft 43, the rollers 13 and 14 will turn to lessen wear against the rim face, hence preventing the aluminum wheel from damage.

Description

[Detailed Description of the Invention] Is the present invention a tire attachment/detachment machine? This invention relates to a tire removal tool that is used when attaching or manually removing a tire from a rim.

When removing the tire from the rim, first place the side of the tire on the board near the rim in the axial direction. By suppressing this and removing the tire bead from the locking part of the rim, a gap e is created.

Insert an iron spatula with a flat tip from the outer circumference,
By pulling this spatula toward the center of the rim, a part of the tire bead is pulled out to the outside of the rim, and then the spatula is slid in the circumferential direction of the rim to move the tire bead around the entire circumference to the outside of the rim. make them leave.

However, as aluminum wheels are being used quite a lot these days, when the spatula is slid by scraping the locking part of the rim, the contact resistance with the rim increases due to the pressing force of the tire bead. Because it is large, the rim surface wears out too much and there is a risk of damaging the aluminum wheel.

Replacing tires may damage the appearance of the rim surface.

There are disadvantages such as shortening the life of the rim.

The present invention improves these points, and an embodiment shown in FIG. P will be described.

The figure shows an example in which the present invention is installed in a tire attachment/detachment machine to remove a tire from a rim. / is the tire removal tool of the present invention; The rollers 3 and 1 are made to protrude, and the rollers 3 and 1 are fitted together so that they can rotate freely. 15 is the 2 flange provided on the /4t, /B is the retaining ring, /7 is the shaft body //e, the elongated hole is provided, 2 is the rim, 2/ is the locking part of the rim, and 3 is the tie. 3/ is the tire bead part.

This shows a part of the Kuha tire attachment/detachment machine, where ri/ is its board, 2 is a rim support piece, 113 is a drive shaft, 11 is a square shaft at the tip of the drive shaft, and 113 is a rotation stopper.

llB is the holding plate.

Insert the drive shaft 3e of the tire attachment/detachment machine, place the rim 2 on the rim support piece 2, fit the port insertion hole [・Kowari stopper 4tS, and fix it with the presser plate ≠ B. By a bead dropping device (not shown).

Peel off the tire bead portion 3/ from the locking portion 2/ of the rim 2.

Insert the gap formed between the rim 2 and the tire 3 by removing the bead and inserting the roller/3.
3 against the outer circumferential edge of the rim and raise the shaft body // to the center side of the rim, and insert the long hole /7 into the square shaft portion 4t11 of the drive shaft 4t3.
to fit. Therefore, the inner edge of the tire bead in this area rides on the roller/g and is pulled out to the outside of the rim, and is engaged and held at 7 lunge/S so as not to fall off, and the roller/3 is applied to the outer peripheral surface of the rim. eThis is pressure-welded. When the drive shaft 11.3 is rotated at a low speed in this state, the roller /3 is moved to the rim 2.
The rollers/gears rotate along the inner edge of the tire 3 in the opposite direction to the rollers 3, while sequentially lifting the tire bead portion 3/ to separate it from the rim 2.

In addition, use the tire removal tool in the tire attachment/detachment machine either manually or by hitting it with a hammer to move the shaft body in the circumferential direction P of the rim.
It can be used in the same way when moving and removing it.

In this way, when a tire is to be removed from a rim, the present invention provides a roller and a roller that are freely rotatably fitted to the shaft end of a tire removal tool that is inserted between the tire and the rim. The roller moves on the outer edge of the rim, and as the roller rotates in the opposite direction, it sequentially lifts the tire bead around the entire circumference and separates it from the rim. The contact surfaces of the tire removal tool, rim, and tire make rotating contact, significantly reducing mutual wear, and preventing damage to the rim and tire. In particular, the rollers and rollers are made of synthetic resin. It is effective. In addition, since it is a 9-turn contact, there is little resistance when rotating the tire removal tool, and the operation can be performed smoothly with a small amount of force.It is also easy to replace the rollers, which greatly improves the efficiency of tire removal work. Furthermore, even when using a tire attachment/detachment machine, the power of the rotating shaft is small and the size can be made smaller.

[Brief explanation of the drawing]

Therefore, it is a side view showing the shape part in use. // is a shaft body, /2 is a support shaft, /3 is a roller, /g is a roller, 2 is a rim, 3 is a tire, and g is a tire attachment/removal machine.

Claims (1)

[Claims] 1. A shaft inserted between the rim and the tire is pulled toward the center of the rim, a part of the tire bead is detached to the outside of the rim, and the shaft is moved along the outer periphery of the rim. The tire removal tool, which is used to remove the tire from the rim by rotating the tool, is set aside, and one end of the shaft is protruded from the support shaft e, and the support shaft e is
Tire removal device 2 characterized in that a roller that contacts the outer edge of the rim and rotates, and a roller that rotates while contacting the inner side of the tire bead portion are respectively supported by freely rotatable fitting. The tire removal tool according to claim 1, wherein the rollers and rollers are made of synthetic resin.