JPH01226409A - Assembly method for tubeless tyre - Google Patents

Abstract

PURPOSE:To enable automation of assembly and to allow reduction of the number of processes by a method wherein a tubeless tyre is mounted to a rim to fill the tyre with air having a specified pressure, the tyre is contained in a sealing container, and through reduction of a pressure in the sealing container, the tyre is inflated to force a bead part into adhesion to the rim. CONSTITUTION:After a tyre 12 is mounted to a rim 11, the tyre is filled with air having a specified pressure. The tyre is placed in a sealing container 20, and a pressure in the container 20 is reduced with the aid of a vacuum pump 21. Thus, the tyre 12 is inflated externally, a bead part 13 is adhered to the rim 11, and is brought into an adapted state. The pressure in the container is restored to an atmospheric pressure and the tyre 12 is taken out. This constitution automates assembly, and enables reduction of the number of processes.

Description

[Detailed description of the invention] Industrial type 2■ and standing! The present invention relates to a wheel to which a tubeless tire is mounted, and to a method for properly assembling the tire by automatically bringing the rim of the wheel and the bead of the tubeless tire into close contact with each other during tire assembly.

For wheels equipped with tubeless tires (hereinafter simply referred to as tires) that do not have built-in tubes, the tires should be placed on the rim (2) of the wheel (1) as shown in Figure 3 to maintain airtightness. When (3) is assembled, the rim (2) and tire (3)
It is necessary to fit the bead part (4) of

Conventionally, in order to properly assemble the tire (3) by making the rim (2) and the end portion (4) fit together, the tire (3) was attached to the rim (
2), as shown in Figure 4, attach the jig (6) to the valve (5) provided on the rim (2), and connect the air supply circuit (7) to the jig (6). Supply air from
Raise the pressure inside the tire (3) to above the specified level, and then
Stretch it to make the bead part (4) fit into the rim (2).

Thereafter, air is removed from the valve (5) via the jig (6) to lower the pressure inside the tire (3) to a specified level.

According to the conventional assembly method, it was difficult to automatically attach the jig (6) to the valve (5), making automation difficult.

That is, the valve (5) is usually covered with a cap (8), and in order to attach the jig (6) to the valve (5), the circumferential position and installation angle of the cap (5) must be constant. Therefore, the position of valve (5) is detected and the position of valve (5) is
It was difficult to automatically attach the jig (6) because the relative positions of the jig (6) and the jig (6) had to be aligned so that the relative positional relationship was constant. Therefore, the installation of the jig (6) has to be done manually, and the work of attaching the film to the cap (8) and the jig (6) have to be done manually.
) took a lot of man-hours to attach and detach, and the workability was very poor.

In addition, the air was slowly escaping, and it took a long time to return to normal.

The present invention aims to provide an assembly method that requires fewer man-hours and is easy to automate.

- The assembly method of this invention is to attach a tubeless tire to the rim of a wheel, fill the inside with air at a specified pressure, and then store it in a sealed container, and then reduce the pressure in the sealed container. The tubeless tire is then inflated to bring the end of the tubeless tire into close contact with the rim.

False - With the method of this invention, when a combination of a tire and a wheel filled with air at a specified pressure is placed in a sealed container and the pressure is reduced, the tire inflates due to the pressure difference between the inside and outside of the tire, causing the bead of the tire to bulge. fits closely to the rim and blends in. Once removed from the sealed container, the tire will naturally return to its original state.

The assembly of the tire according to this invention is as shown in Fig. 2.
First, the tire (12) is attached to the rim (11) of the wheel (1o), and then the combined body (14) is attached to the air filling machine (15). The air filling machine (15) is
Press the peripheral edge of the tire (12) with a pusher (16) at a constant pressure to separate the bead (13) of the tire (12) and the rim (1).
A gap (17) is formed between the tires (1) and 1), and air at a specified pressure is filled into the tire (12) through the gap (17). When the air is filled to a specified pressure, the tire (12) inflates and pushes up the pusher (16), closing the gap (17).
(18) is a stand, and (19) is a fixing metal fitting.

After filling with air, the air filling machine (15) sends the combined body (14) to the air filling machine (15).
) is removed and placed in a sealed container (20) as shown in Fig. 1. After storing, the vacuum pump (21) provided in the sealed container (20) is operated to reduce the pressure inside the sealed container (20). do. Then, due to the pressure difference between the inside and outside of the tire (12), the tire (12) expands outward, causing the bead (13) of the tire (12) to touch the rim (1).
After that, the sealed container (20) is returned to atmospheric pressure, and the combined body (14) is taken out from the sealed container (20). When taken out from the sealed container (20), the tire (
12) returns to its original state filled with air at the specified pressure,
Tire (12) M assembly work is completed.

In addition, the number of tires (12) housed in the sealed container (20) may be one, or a plurality of tires, for example, five tires, may be housed to perform work on a plurality of tires at the same time.

33IB Takumi This invention attaches a tire to a wheel, fills it with air at a specified pressure, and then inflates the tire in a sealed container using the pressure difference between the inside and outside of the tire to blend the bead of the tire with the rim. It is no longer necessary to attach a jig to the valve to inject or remove air as in the past, and there is no need to attach or remove a cap to the valve or attach a film to the jig on the valve, reducing the number of man-hours. This greatly reduces the amount of work required, enables automation, and allows multiple assembly operations to be performed at the same time.
Productivity is greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view for explaining the main operations of the assembly method of the present invention, Fig. 2 is a schematic illustration of an air filling machine, and Fig. 3 is a sectional view showing a general tire mounting state. , FIG. 4 is a partial sectional view for explaining a conventional assembly method. (10) --- Wheel, (11) --- Rim, (12) --- Tire, (13) --- Bead section, (20) --- Sealed container, (21) --- Vacuum pump. Patent applicant Dino Hits Kogyo Co., Ltd.; Agent Gangwon Province
I: Figure 2

Claims (1)

[Claims] (1) Attach tubeless tires to the wheel rims,
The tubeless tire is characterized by filling the inside with air at a specified pressure, storing it in a sealed container, and then reducing the pressure in the sealed container to inflate the tubeless tire so that the bead of the tubeless tire comes into close contact with the rim. How to assemble tubeless tires.