JP2788504B2 - Jig for inflating tubeless tires - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method and a jig for injecting air into a tubeless tire, and more particularly, to easily inject air even if there is an air leak due to the collapse of the tire of the tubeless tire. The present invention relates to a method and a jig for injecting air into a tubeless tire.

[Conventional technology]

In general, tubeless tires frequently used in motorcycles and the like perform air injection when they are replaced. Since such replacement tubeless tires are usually piled up vertically and stocked in many cases, the side surface of the tire is crushed by receiving a load from above, and there may be places where the tire beads come off from the ears of the rim. In such a case, if air is injected by an air gun, the air leaks from the gap between the wheel rim and the tire bead, and the leak gap is further increased, so that the tire bead does not adhere to the wheel rim, which is a problem. For this reason, conventionally, air injection has been performed while devising, for example, pressing a leak location from the outside or applying a plate to the location.

[Problems to be solved by the invention]

However, in the above-mentioned conventional method, since it is not possible to accurately close the leak gap, in practice, for a tubeless tire having such tire bead peeling,
There was a problem that it took an extremely long time.

The present invention focuses on the above-mentioned conventional problems, and makes it possible to easily inject air into a tubeless tire by simply bringing the ear into close contact with the tire bead and the wheel rim to eliminate leakage gaps. An object is to provide an injection method and a jig.

[Means for solving the problem]

In order to achieve the above object, a jig for injecting air into a tubeless tire according to the present invention is provided with a winding means wound around the outer peripheral surface of the tubeless tire, and a frame to which one end of the winding means is attached so as to be rotatable. A winding roller provided with a winding roller for winding the other end of the winding means and a handle for rotating the winding roller; and applying a braking force to the winding roller, and releasing the winding means. And a brake means for enabling the winding roller to rotate in the unwinding direction in accordance with the expansion of the tubeless tire.

[Action]

According to the above configuration, the winding means such as a belt is wound around the outer peripheral surface of the tubeless tire, and this is fastened by the fastening means. Although the tightened tire reduces the outer diameter, the inner diameter side is supported by the wheel rim, so that the tire is deformed flat so as to expand the side surface of the tire due to its elastic deformation. For this reason, the tire bead is pressed against the ear of the wheel rim, and the air leakage gap is closed. When air is injected in this state, a force is generated to oppose the tightening deformation of the wrapping means around the tire, but the tightening force is gradually reduced by the brake means. For this reason, sudden unwinding is eliminated and air can be safely injected into the tubeless tire, and the tire bead due to sudden unwinding is prevented from coming off the rim ear again. Therefore, even if there is partial peeling between the tire bead and the wheel rim, a large amount of air can be injected by the air gun while minimizing air leakage, and the air injection operation can be performed quickly.

〔Example〕

Hereinafter, specific examples of a method for injecting air into a tubeless tire and a jig according to the present invention will be described in detail with reference to the drawings.

1 and 2 show a jig for injecting air into a tubeless tire according to an embodiment. As shown in the figure, the jig 10 includes a belt 12 as a winding means wound around the outer periphery of the tubeless tire, and a ratchet buckle 14 for winding the belt 12 around.

The ratchet buckle 14 includes a fixed shaft 16 to which one end of the belt 12 is fixed, and a frame 20 provided with a winding roller 18 arranged in parallel with the fixed shaft 16 so as to wind the other end of the belt 12. The winding roller 18 is formed by dividing a cylindrical body into two parts, and is rotated while being wound around the belt 12 in a gap between the two, thereby enabling winding of the belt. Further, a ratchet mechanism for rotating the winding roller 18 is attached to the frame 20. This is a ratchet gear attached to both ends of the winding roller 18 projecting from the side plate of the frame 20.
A half-moon-shaped hole is formed in the center of the ratchet gear 22, and the winding roller 18 is inserted so that the ratchet gear 22 can rotate integrally with the winding roller 18. Further, a lever 24 for free rotation with respect to the winding roller 18 and rotating the ratchet gear 22 is provided. The lever 24 is bifurcated so as to be pivotally attached to both ends of the winding roller 18, and a feed pawl 26 that engages with the pawl of the ratchet gear 22 is passed over the lever 24. The feed claw 26 is attached by being urged by a spring 28 in the direction of engagement with the ratchet gear 22,
While the ratchet gear 22 is rotationally fed by the swinging operation of the lever, the feed pawl 26 can get over the gear pawl by returning the lever 24. Further, the feed pawl 26 can be disengaged from the ratchet gear 22 by an arbitrary operation, and is attached to the lever 24 so as to be movable against the spring 28 by a handle 26A. The winding roller 18 divided into two parts is connected by a connecting pin 18A at a protruding portion of the outer lever 24 from the cam 24A so as not to be separated.

On the other hand, a stopper plate 30 for holding the ratchet gear 22 rotated by the lever 24 in a fixed position is attached to the frame 20 side, and the ratchet gear 22 is
Are biased in the direction of engagement. This stopper plate 30
Is a cam 24 formed on the boss plate portion of the lever 24.
A separates the ratchet gear 22 from the ratchet gear 22 so that the ratchet gear 22 and the winding roller 18 can rotate freely.

Further, the belt 12 wound around the winding roller 18 by the operation of the lever 24 is attached to the ratchet buckle 14,
Brake means 34 is attached so that the lever cam 24A does not suddenly loosen by the release operation. This brake means 34 presses the side of the winding roller 18 around which the belt 12 is wound in the axial direction,
This prevents the belt 12 from becoming loose due to the frictional force. For this purpose, as shown in FIG. 2, a pressing pin 36 is provided which is inserted into the central hole of the winding roller 18 from both ends of the roller and faces the ratchet gear 22. This pressing block 36 has a relief groove 36A for the connecting pin 18A formed on the surface to be inserted into the winding roller 18, and a circular hole 36B formed at the center of the opposite surface, set at a height that can protrude from the end of the winding roller 18. Have been. On the other hand, the winding roller 18
There is provided a gate-shaped body 38 sized so as to straddle both ends of the body, and a screw hole 38A is formed in a leg portion thereof, and a bolt 40 is screwed and penetrated. The bolt 40 fits into the circular hole 36B of the pressing frame 36, presses the pressing frame 36 by screwing in the bolt 40, and applies a pressing force along the axial direction of the winding roller 18 as shown by an arrow in FIG. The belt 12 wound around the roller 18 can be prevented from being unwound.

A method for injecting air into a tubeless tire using the jig 10 for injecting air into a tubeless tire according to such a configuration is as follows. Although the target tubeless tire 42 has a circular outer peripheral surface as shown in FIG. 3, a gap may be generated at a joint portion with the wheel rim 44. For this reason, the belt 12 of the jig 10 is
The tire 42 is wound around the outer peripheral surface of the tire 42 and fastened by the ratchet buckle 14 to deform the tire 42 flat as shown in FIG. This can be easily performed by operating the lever 24 of the ratchet buckle 14 and winding the belt 12 of the winding roller 18. By such an operation, the tubeless tire 42 is deformed as shown in FIG. 4 (2). Due to this deformation action, the tire bead of the tubeless tire 42
42A is pressed against the ear 44A of the wheel rim 44 by the elastic action. As a result, as shown by the imaginary line in FIG. 3 (2), even if the tire bead 42A and the ear 44A are separated from each other and a gap is generated, the gap is closed by the flat fastening of the jig 10. It is. By performing air injection from the injection valve with an air gun in this state, leakage from the gap due to peeling of the tire bead 42A is eliminated, and the air injection operation can be performed quickly.

When air injection is started, internal pressure is applied to the tubeless tire 42 so as to eliminate flat deformation. At this time, it is necessary to release the stopper plate 30 of the ratchet buckle 14 and loosen the tightening force according to the inflation of the tire. In this embodiment, the brake means 34 is used at the time of starting the injection of air,
An appropriate braking force is applied to the winding roller 18. As a result, even if the stopper plate 30 is released, the winding roller 18 is prevented from rapidly rewinding and rotating, and the tightening force is gradually reduced in accordance with the expansion of the tire. When air is supplied to the tubeless tire 42 in this manner, even if there is a gap between the tire bead 42A and the wheel rim 44, it is possible to effectively prevent air from leaking from that location. Can be sent, and the work can be speeded up.

In the above embodiment, the tubeless tire 42 is tightened by the belt 12.However, a bendable band plate or the like may be used, and a tightening force may be applied other than the ratchet buckle 14 as the tightening means. If possible, a screw-type fastening tool or the like can be used. Further, the braking means may not only press the belt 12 from the side edge but also perform a braking action by a frictional force so as to press against the winding roller 18. Of course, if another fastening means is used, it is sufficient to use a braking means according to the means, and it is sufficient if it has a function of gradually releasing the fastening force.

〔The invention's effect〕

As described above, according to the present invention, air is injected while the tire bead and the ear of the rim are brought into close contact with each other by rolling down and flattening the outer peripheral surface of the tubeless tire. Since the rolling deformation of the tire can be gradually released, an excellent effect of greatly improving the workability of the air injection can be obtained while minimizing the air leakage from the tire bead portion of the tubeless tire. Can be

[Brief description of the drawings]

FIG. 1 is a perspective view of a jig for injecting air into a tubeless tire according to an embodiment, FIG. 2 is a cross-sectional view of an essential part of the jig, FIG.
(2) is a perspective view and a cross-sectional view of the tubeless tire, and FIGS. 4 (1) and (2) are a perspective view and a cross-sectional view of a tire tightened state. 10 Jig, 12 Belt, 14 Ratchet buckle, 34 Brake means, 42 Tubeless tire,
42A ... tire bead, 44 ... wheel rim, 44A ... ear.

Claims (1)

(57) [Claims] 1. A winding means wound around the outer peripheral surface of a tubeless tire; a winding roller rotatably provided on a frame to which one end of the winding means is attached, and winding the other end of the winding means; A winding means having a handle for rotating the winding roller, and applying a braking force to the winding roller and, when the winding means is released, moving the winding roller in the unwinding direction in accordance with the expansion of the tubeless tire. A jig for injecting air into a tubeless tire, comprising: a brake means enabling rotation.