JPS6254491B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fitting device for a hose joint and a connecting pipe, such as a hose joint provided at the end of a hose of a vacuum cleaner, and a device rotatably attached to the hose joint. We aim to improve the means for preventing air leakage at the fitting part with the connecting pipe, and in particular, use elastic soft materials such as rubber, soft vinyl chloride, and soft polyethylene, which are used to prevent air leakage at the fitting part. This invention relates to a fitting device for a hose joint and a connecting pipe, which is an improvement to a packing made of a material.

In order to prevent air leakage at the rotating part of the fitting part between the hose joint and the connecting pipe rotatably attached to it, it is made of soft and elastic material such as rubber, soft vinyl chloride, and soft polyethylene. When using a made packing, this packing is
Generally, it consists of a fixed part that is press-fitted or fixed by other means to the inner circumference of the hose joint or the outer circumference of the connecting pipe, and a deformable lip part that is slidably pressed against the outer circumference of the connecting pipe or the inner circumference of the hose joint. However, this method has the following drawbacks.

When fixing the fixed part of the seal to the inner circumference of the hose joint and slidingly press the lip part to the outer circumference of the connecting pipe, it is difficult to fix the fixing part because the seal itself is made of a soft material. For example, by adhering to the inner surface of the hose joint, or by using a separate fixing part such as a ring-shaped seal holder made of a hard material to maintain the shape of the seal, as shown in Fig. 5 of the conventional example described later. This has disadvantages in that it requires means, is difficult to manufacture, and increases the number of parts.

In addition, when the fixed part of the packing is fixed to the outer circumference of the connecting pipe and the lip part is slidably pressed against the inner circumference of the hose joint, the fixing of the packing can be easily done by press-fitting the fixed part into the connecting pipe. However, when press-fitting, the fixing part does not necessarily stretch uniformly over the entire circumference, and the lip part, which is press-fitted with a certain amount of tightness in order to press it against the inner circumference of the hose joint, is made of soft material. Because it is deformable, it is not possible to uniformly shrink in the circumferential direction by the amount of change in the outer diameter dimension of the lip part due to press fitting, and the cause is that the change in outer diameter dimension is absorbed by partial deformation in the radial direction. As shown in FIG. 7 of the conventional example, which will also be described later, the tip of the lip part is wavy and has the disadvantage that gaps are created at each part, and air leaks from these gaps. be.

Regarding the above point, FIG. 5 is a cross-sectional view of an exemplary configuration according to the prior art.

That is, the fixed part 15A of the packing 13A is fixed to the inner surface of the hose joint 8A related to the hose 6A with a ring-shaped packing holder 20A made of a hard material, and the lip part 21A is slidable on the outer periphery of the connecting pipe 9A. 12A is the cover, 1
8A is a stopper, and 19A is a gap.

However, such a conventional structure has the above-mentioned drawbacks.

Furthermore, FIG. 6 is a cross-sectional view of another exemplary configuration according to the prior art, and FIG. 7 is a cross-sectional view taken along the Y--Y line in FIG. 6.

That is, the fixing portion 15B of the gasket 13B is press-fitted into the gasket mounting portion 14B of the connecting pipe 9B, and
The lip part 21B is attached to the hose joint 8 related to the hose 6B.
It is slidably pressed against the inner circumference of B, and is 12
B is a cover, 18B is a stopper, and 19B is a gap.

22B is a gap created as follows.

When the fixing part 15B of the packing 13B is press-fitted into the packing attachment part 14B of the connecting pipe 9B, the fixing part 15B does not necessarily stretch uniformly over the entire circumference, and the lip part 21B is made of a soft material and is deformable. Therefore, it is not possible to uniformly contract in the circumferential direction by the amount of change in the outer diameter dimension due to press-fitting into the hose 8B, and it is difficult to absorb the amount of change in the outer diameter dimension by partial deformation in the radial direction. This gap is caused by the wave-shaped tip of the lip portion 21B.

As mentioned above, this gap 22B is
This causes air leakage and has the above-mentioned drawbacks.

The present invention eliminates the drawbacks of the prior art as described above, is easy to manufacture, and can almost completely prevent air leakage.
It is an object of the present invention to provide a fitting device for a hose joint and a connecting pipe, which has means for preventing air leakage.

A feature of the present invention is that the fixing part of the packing, which is made of a soft and elastic material and has a thick fixing part and a relatively thick sliding part connected by a thin lip part, is attached to the hose joint. This fitting device for a hose joint and a connecting pipe is constructed by press-fitting and fixing a seal mounting part provided on the outer periphery of a rotatably mounted connecting pipe, and pressing the sliding part of the seal into contact with the inner periphery of the hose joint.

Next, one embodiment of the present invention will be described based on FIGS. 1 to 4.

Here, FIG. 1 is a front view of a vacuum cleaner equipped with an embodiment device according to the present invention, FIG. 2 is a sectional view of essential parts of the embodiment device, and FIG. 3 is a front view of a vacuum cleaner equipped with an embodiment device according to the present invention. Figure 4 is an exploded sectional view of each part of
FIG. 3 is a cross-sectional view taken along the X-ray.

In the figure, 1 is a main body of a vacuum cleaner (hereinafter referred to as the main body of the vacuum cleaner) which has a built-in electric blower, a dust collector (not shown), etc., and has handles 2 and 3 on the top for transportation. The lower part is equipped with casters 4 and wheels 5 for running.

6 is a flexible hose, 7 is a hose 6
Hose joint B, 8 provided at the tip of the vacuum cleaner main body 1 side for connecting the hose 6 to the vacuum cleaner main body 1
is a hose joint provided at the suction side end of the hose 6 for attaching a connecting pipe 9 having a circular cross section.

The connecting pipe 9 is rotatably attached to the hose joint 8 in order to prevent the hose 6 from twisting during use of the vacuum cleaner.

10 is an extension pipe connected to the connecting pipe 9;
Reference numeral 1 denotes a suction body attached to the tip of this extension tube 10.

12 is a cover for protecting the joints between the hose 6, the hose joint B7, and the hose joint 8.

Reference numeral 13 denotes a gasket made of a soft and elastic material such as rubber, soft vinyl chloride, and soft polyethylene, which has a thickness that is press-fitted and fixed to the gasket mounting portion 14 provided on the outer periphery of the connecting pipe 9. A solid fixed part 15, a relatively thick sliding part 16 that is slidably pressed against the inner surface of the hose joint 8, and a thin lip part for communicating the fixed part 15 and the sliding part 16. 17.

In addition, as shown in FIG. 3, in the packing 13, the inner diameter dimension d ₁ of the fixing part 15 is smaller than the outer diameter dimension D ₁ of the packing mounting part 14, and the outer diameter dimension D ₂ of the sliding part 16 is smaller than the outer diameter dimension D 1 of the packing part 14. is the inner diameter dimension d ₂ of the hose joint 8
The dimensions are set to be almost the same.

Then, when the fixed part 15 is press-fitted into the seal mounting part 14 with a tightening margin of (D ₁ - _{d 1} ) as shown by the broken line in FIG. 3, the outer diameter dimension of the sliding part 16 is D ₂
It becomes slightly larger from D3 to _D3 .

Therefore, the sliding portion 16 is attached to the hose joint 8,
It is press-fitted with a tightness of (D ₃ - _{d 2} ).

Note that the outer diameter dimension D ₂ of the sliding portion 16 is set to be approximately the same as the inner diameter dimension d ₂ of the hose joint 8, as mentioned earlier, so the sliding portion 16 in the assembled state is The amount of change in the outer diameter dimension becomes almost zero.

18 is a stopper for rotatably attaching the connecting pipe 9 to the hose joint 8, and 19 is a gap formed between the hose joint 8 and the connecting pipe 9.

As described above, in the packing 13 according to the above embodiment, since the change in the outer diameter of the sliding portion 16 in the assembled state is almost zero, the change in the outer diameter at the time of press fitting causes The sliding portion 16 does not have a wave shape.

Moreover, the sliding part 16 is made relatively thick, and the fixed part 1
5 was connected with the thin lip part 17,
When press-fitting the fixing part 15, even if the elongation is not uniform over the entire circumference, the non-uniform elongation may be caused by the relatively thin and relatively thick sliding part 1.
6, which is absorbed by the lip portion 17 which can be more easily deformed, and the sliding portion 16 is deformed due to the non-uniform elongation of the fixed portion 15, causing air leakage, for example as shown in FIG. This does not create a gap 22B.

Furthermore, the above-described packing 13 can be easily assembled by simply press-fitting the fixing portion 15 into the packing attachment portion 14 of the connecting pipe 9.

Although the above embodiment relates to a fitting device for a vacuum cleaner, the present invention is not limited to such applications, and can be broadly applied to a fitting device for a hose joint and a connecting pipe. It can be used for general purposes.

Taking all the above into account, the present invention provides a fitting between a hose joint and a connecting pipe rotatably attached to the hose joint, which is easy to manufacture and can almost completely prevent air leakage. This invention can provide a fitting device for a hose joint and a connecting pipe that has means for preventing air leakage at the joint, and can be said to be an invention with excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a vacuum cleaner equipped with an embodiment device according to the present invention, Fig. 2 is a sectional view of main parts of the embodiment device, and Fig. 3 is an exploded view of various parts of the embodiment device. 4 is a sectional view taken along line X--X in FIG. 2, FIG. 5 is a sectional view of an exemplary configuration according to the prior art, and FIG. 6 is a sectional view of another exemplary configuration according to the prior art. The cross-sectional view of Fig. 7 is the Y-
It is a sectional view along the Y line. 1... Vacuum cleaner main body, 6... Hose, 8... Hose joint, 9... Connection pipe, 13... Packing, 14... Packing mounting part, 15... Fixed part, 16... Sliding part, 17
...Rip section.

Claims (1)

[Scope of Claims] 1. The fixed part of the packing is made of a soft and elastic material and has a thick fixed part connected by a thin lip part and a relatively thick sliding part, and the fixed part is connected to a hose joint. A fitting between a hose fitting and a connecting pipe, characterized in that the fitting is press-fitted into a gasket fitting part provided on the outer periphery of a connecting pipe which is rotatably attached to the hose fitting, and the sliding part is pressed into contact with the inner periphery of the hose fitting. combining device. 2. In what is stated in claim 1,
A fitting device for a hose joint and a connecting pipe, in which the outer diameter of the sliding part of the seal is almost the same as the inner diameter of the hose joint. 3 In what is stated in claim 1,
A hose in which a hose joint is attached to the end of a hose that is connected to a main body of a vacuum cleaner with a built-in electric blower and dust collector, and a connecting tube is rotatably attached to the hose joint. A fitting device between a joint and a connecting pipe.