JPH0214184B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching a rubber sleeve to the outer peripheral surface of a component.

As shown in FIGS. 1 and 2, when a rubber sleeve 2 with a diameter equal to or smaller than the diameter of the component 1 is attached to the component 1, there is a drawback that the rubber sleeve 2 cannot be attached properly due to the large frictional force of the rubber. ,
Even if the rubber sleeve is attached, the conventional technology is such that the rubber sleeve is twisted or not stretched out evenly.

Furthermore, it is even more difficult to bond the component 1 and the rubber sleeve 2 with adhesive, as the adhesive applied to the component 1 is squeezed by the inner surface of the rubber sleeve 2 when it is attached, causing the adhesive to harden. It has the disadvantage that it sways and causes unevenness on the adhesive surface.

The present invention aims to solve the above-mentioned drawbacks, and includes a rubber sleeve placed inside a pipe having a diameter larger than the diameter of the rubber sleeve, and both ends of the sleeve tightly attached to the pipe.
Forming a sealed space between the rubber sleeve and the pipe, reducing the pressure in this space to uniformly extend the diameter of the rubber sleeve, and inserting a part into the space to return the diameter of the rubber sleeve. The present invention is characterized in that it is possible to correctly attach a rubber sleeve to a component.

Embodiments of the present invention will be described below with reference to the drawings.

3 to 5 show an embodiment of the present invention,
Fig. 3 is a cross-sectional view, Fig. 4 is a vertical cross-sectional view, and Fig. 5 is a longitudinal cross-sectional view of a state in which parts are inserted. A protrusion 4 is formed on the inner peripheral surface of this pipe 3, and a connection port 6 for a decompression hose 5 is provided so as to open into this inner peripheral surface.

Both ends of the rubber sleeve 2 housed inside the pipe 3 are folded back to the outside of both ends of the pipe 3, and the periphery is fixed with a band 7, so that the outer periphery of the rubber sleeve 2 and the pipe 3 are fixed as shown in FIG. A sealed space 8 is formed between the inner circumferential surface of the

Next, as shown in FIG.
The diameter of the rubber sleeve 2 is expanded by reducing the pressure with the pressure reducing hose 5 connected to the connection port 6 of the pipe 3 and pulling the rubber sleeve 2 evenly toward the inner peripheral surface of the pipe 3. The rubber sleeve 2 is attached to the outer peripheral surface of the component 1 by inserting the component 1 into the rubber sleeve 2 and determining the position, and then returning the inside of the space 8 to atmospheric pressure. Then, by returning the folded portion to its original position, the rubber sleeve 2 is fully attached to the component 1 and becomes an integral part.

The function of the protrusions 4 on the inner circumferential surface of the pipe 3 in the above embodiment is such that when the air in the space 8 is removed, the pressure in the space 8 is evenly reduced and the rubber sleeve 2 is expanded uniformly. The state of the protrusion is not specified; for example, the protrusion may be formed by providing grooves in a lattice pattern on the inner surface of the pipe, and the opening of the connection port may be provided in this groove.

6 and 7 show other embodiments, FIG. 6 is a plan view, and FIG. 7 is a vertical sectional view. In the above embodiment, the rubber sleeve is relatively thin and both ends can be folded back. It is possible, but some rubber sleeves are thick and cannot be folded back. This example can be applied to such a rubber sleeve.
In the figure, 2 is a rubber sleeve, and 3 is a pipe having an inner diameter larger than that of the rubber sleeve 2. A projection 4 is formed on the inner circumferential surface similar to that of the above embodiment, and the protrusion 4 is opened in the inner circumferential surface. A connection port 6 for a decompression hose 5 is provided at the bottom.

Reference numeral 9 designates an annular ring having a locking portion 10 with a tapered outer periphery, and the end of the rubber sleeve 2 is attached to the locking portion 10 and is secured to the inside of the open end of the pipe 3 with a screw 11 or the like. be done.

12 is a band that locks the rubber sleeve 2 to the locking portion 10, and 13 is an O-ring.

According to the above configuration, both ends of the rubber sleeve 2 are attached to the locking portions 10 of the ring 9 and fixed with the band 12. Next, this ring 9 is fixed to the inner periphery of both openings of the pipe 3 with screws 11 or the like so that the ring 9 is integrally formed, thereby forming a sealed space 8 between the rubber sleeve 2 and the inner periphery of the pipe 3.

The inside of the space 8 thus created is connected to the connecting port 6 of the pipe 3.
The diameter of the rubber sleeve 2 is expanded by reducing the pressure with the decompression hose 5 connected to the pipe 3 and evenly pulling the rubber sleeve 2 toward the inner circumferential surface of the pipe 3, and inserting the component 1 into the rubber sleeve 2 to determine its position. By returning the inside of the space 8 to atmospheric pressure after
attached to the outer circumferential surface of the Then, by removing the ring 9 from the pipe 3, removing the band 12, and removing the ring 9 from between the rubber sleeve 2 and the component 1, the rubber sleeve 2 is fully attached to the component 1 and becomes integral.

Note that in both of the above embodiments, the rubber sleeve is an example of a sleeve made of an elastic body, and other sleeves made of synthetic resin may also be used. Moreover, various cylindrical shapes are possible.

According to the present invention having the above structure and operation, a rubber sleeve is housed in a pipe having a diameter larger than that of the pipe and provided with protrusions at regular intervals over almost the entire inner peripheral surface, and both ends of the rubber sleeve are connected to the pipe. A sealed space is formed between the inner peripheral surface of the pipe and the rubber sleeve by making close contact with the open end, and by reducing the pressure in this space, the diameter of the rubber sleeve is expanded, and parts are inserted and positioned within the space. By doing this and returning the space to atmospheric pressure, the rubber sleeve can be attached to the component. Therefore, when the pressure is reduced, the entire inner circumferential surface of the pipe contacts the protrusions evenly, allowing the rubber sleeve to spread evenly, allowing parts to be inserted without contacting the rubber sleeve, and allowing the parts to be inserted in the reduced pressure state. When the pressure is returned to atmospheric pressure, air can pass between the protrusions and circulate around the rubber sleeve evenly, thereby eliminating kinks and uneven stretching of the rubber sleeve. . Therefore, it is possible to attach the rubber sleeve with it stretched out evenly in the correct position, and even when adhesive is applied, the rubber sleeve will not be squeezed, so the entire surface will be attached evenly. It happens.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a state in which a conventional rubber sleeve is installed, Fig. 2 is a longitudinal sectional view, Fig. 3 is a transverse sectional view showing an embodiment of the present invention, Fig. 4 is a longitudinal sectional view, and Fig. 5 is a longitudinal sectional view.
The figure is a longitudinal sectional view of a state in which parts are inserted, FIG. 6 is a plan view of another embodiment, and FIG. 7 is a longitudinal sectional view. 1...Parts, 2...Rubber sleeve, 3...Pipe, 4...Protrusion, 6...Connection port, 8...Space.

Claims (1)

[Scope of Claims] 1. A pipe having a connection port connected to a decompression hose and having a larger diameter than a rubber sleeve; protrusions provided at regular intervals over almost the entire inner peripheral surface of the pipe; It consists of fixing means that directly or indirectly fixes both ends of the rubber sleeve arranged on the pipe in close contact with the pipe, and a sealed space formed between the rubber sleeve fixed by this fixing means and the pipe. The rubber sleeve is characterized in that the rubber sleeve is spread evenly by reducing the pressure through the pressure reducing hose, and after inserting the component into the rubber sleeve, the space is returned to atmospheric pressure and the rubber sleeve is attached to the component. mounting device.