JP2607614Y2 - Fuel tank valve - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a fuel tank valve,
For example, the present invention relates to a structure of a seal ring of a switching valve which is attached to a filler tube and operates at the time of refueling to shut off a fluid flow path.

[0002]

2. Description of the Related Art FIG. 6 shows an example of such a valve, in which a line between a fuel tank and a canister is normally communicated, and this line is cut off during refueling to form an air chamber in the fuel tank. The valve. In FIG. 6, 1
Is a valve mechanism, which allows the valve body 2 with a spring interposed to slide in the valve chamber 4 inside the inner case 3.
On the side wall of the inner case 3, two ventilation holes 5 communicating with the valve chamber 4 are formed, which are open in the state. Outside the inner case 3, there are arranged outer cases 7 to which nipples 6 are welded at positions facing the air holes 5, respectively. A seal ring 8 is fitted around the ventilation hole 5 to seal between the inner case 3 and the outer case 7. The outer case 7 includes the valve mechanism 1
Is fixed to the substrate 9 supporting the substrate, and the substrate 9 is fixed to the filler tube.

[0003] The operation of this valve will be described. Normally, since the two ventilation holes 5 are not closed by the valve body 2, the evaporative gas in the fuel tank connected to one nipple 6 is discharged from the valve chamber 4. To the canister connected to the other nipple 6, and is stored in the canister. The canister sends the stored fuel gas to the engine together with air when the engine is started. At the time of refueling, the valve body 2 is raised by the shutter valve in the filler tube pushed open by the refueling gun to close the ventilation hole 5, so that the line to the canister is closed, and an air chamber is formed between the canister and the fuel tank. As a result, fuel supercharging is prevented.

[0004]

In such a fuel tank valve, the conventional seal ring 8 is provided in an annular groove 10 provided around the ventilation hole 5 of the inner case 3 as shown in FIG. When the inner case 3 is installed in the outer case 7, the seal ring 8 mounted in the annular groove 10 is pulled by the outer case 7 and falls off from the annular groove 10 when the inner case 3 is incorporated into the outer case 7, or the seal is not uniformly tightened. However, there is a problem in that a margin is generated, the insertion resistance becomes high, the work becomes difficult, and the inner case 3 is deformed.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a valve for a fuel tank without a seal ring falling off.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an inner case having a valve mechanism therein,
Place the piping nipple facing the fluid passage hole in the inner case.
The outer case provided and the inside of the peripheral portion of the fluid passage hole.
A seal ring that seals between the case and the outer case
In the fuel tank valve provided, the seal ring,
The reinforcement ring is formed integrally with the inner or outer periphery of the reinforcement ring.
Is, in a seal portion made of a rubber-like elastic body having one or more lip portions in contact with the inner case and outer case
Wherein the reinforcing ring is provided on a side wall of the inner case.
The annular groove is fitted to the inner peripheral surface, the annular wall, or the annular projection . Instead of the above configuration,
Ring is formed integrally with the reinforcing ring and the inner periphery of the reinforcing ring,
One or more parts that contact the inner and outer cases
Composed of rubber-like elastic body with lip
And the reinforcing ring is provided on the side wall of the outer case.
You may make it fit on a wall . Also seal ring
Is formed integrally with the reinforcing ring and the outer periphery of the reinforcing ring,
At least one lip is attached to the case and
And a seal portion made of a rubber-like elastic body having a
So that the nipple extends inside the outer case
And the end of the nipple located inside the outer case
A reinforcement ring may be fitted to the outer periphery of the rim.

[0007]

According to the present invention, the seal ring can be securely fixed by the above structure, so that the seal ring does not fall off or shift, improving the sealing performance and increasing the efficiency of the assembling work. Can be.

[0008]

FIG. 1 shows a first embodiment of the present invention.
The seal ring 11 is fitted in an annular groove 14 formed around the ventilation hole 13 of the inner case 12. The seal ring 11 includes a reinforcing ring 15 fitted to the inner peripheral surface of the annular groove 14 of the inner case 12 and a seal portion 16 made of a rubber-like elastic body integrally formed on the outer peripheral portion of the reinforcing ring 15. Have been. The reinforcing ring 15 is formed of a metal material, preferably a resin material, which does not damage the inner peripheral surface of the annular groove 14. The seal portion 16 includes a lip 16a that contacts the bottom of the annular groove 14, a lip 16b that contacts the outer case 17, and an annular groove 1 provided on the outer peripheral surface in a circumferential direction.
6c. The outer case 17 has a cylindrical wall 18 formed by burring at a position facing the air hole 13 of the inner case, and a base of a nipple 19 is fixed to the cylindrical wall 18 by welding.

In the first embodiment, since the seal ring 11 is fitted on the inner peripheral surface of the annular groove 14 formed around the ventilation hole 13 of the inner case 12, the inner case 12 is When the seal ring 11 is incorporated into the housing 17, the seal ring 11 does not fall off or shift, and the insertion resistance does not increase, making it difficult to work, and the inner case 12 is not deformed. In addition, the sealing portion 1
Since the circumferential groove 16c is provided on the outer peripheral surface of the inner case 6, when the inner case 12 is incorporated into the outer case 17, the lips 16a and 16b are easily bent, and the insertion resistance can be further reduced.

In the first embodiment, the reinforcing ring 15 of the seal ring 11 is
4, the reinforcing ring 15 of the seal ring 11 may be fitted to an annular wall or an annular projection similar to the inner peripheral surface. In each of the following embodiments, the groove in which the reinforcing ring is fitted can be replaced with a wall or a projection.

FIG. 2 shows a second embodiment of the present invention. The seal ring 21 is provided with a ventilation hole 23 of the inner case 22.
Is fitted in an annular wall 24 formed around the periphery of the rim. The seal ring 21 includes a reinforcing ring 25 fitted to the annular wall 24 of the inner case 22 and a sealing portion 26 made of a rubber-like elastic body integrally formed on the inner peripheral portion of the reinforcing ring 25. . The reinforcing ring 25 is formed of a metal material that does not damage the annular wall 24, preferably a resin material. The sealing portion 26 includes a lip 26a that contacts the bottom of the annular wall 24 and a lip 26b that contacts the outer case 27.
And an annular groove 26c provided in the inner peripheral surface in the circumferential direction. The outer case 27 has a cylindrical wall 28 formed by burring at a position facing the ventilation hole 23 of the inner case,
The base of the nipple 29 is fixed thereto by welding. The operation and effect of this embodiment are the same as those of the first embodiment.

FIG. 3 shows a third embodiment of the present invention, which is different from the first embodiment in that a seal ring 11 is provided.
Seal portion 16 has two lips 16a and 16d that contact the bottom of annular groove 14 and two lips 16a that contact outer case 17.
And two lips 16b and 16e to further improve the sealing performance. The other configuration, operation and effect are the same as those of the first embodiment.

FIG. 4 shows a fourth embodiment of the present invention. The difference from the second embodiment is that a seal ring 21 is provided.
Is mounted on the annular wall 30 provided on the outer case 27, not on the annular wall 24 of the inner case 22, and the other configuration, operation and effect are the same as those of the second embodiment. Is the same as

FIG. 5 shows a fifth embodiment of the present invention, which differs from the first and second embodiments in that the nipple 31 is welded to the inside of the annular wall 28 of the outer case 27 and The nipple 31 extends to the inside of the case 27, and the reinforcing ring 15 of the seal ring 11 is fitted around the outer periphery of the end of the nipple 31. The structure of the seal ring 11 is the same as that of the first embodiment, and the structure of the inner case 22 is the second embodiment.
This embodiment has the same functions and effects as those of these embodiments.

[0015]

As described above, according to the present invention, the seal ring is attached to the reinforcing ring and the inner or outer peripheral portion of the reinforcing ring.
And a seal portion made of a rubber-like elastic body having at least one lip at a portion contacting the inner case and the outer case, and the reinforcing ring is fitted to the above-described portion.
The structure allows the seal ring to be fixed securely, and when the inner case is incorporated into the outer case,
The seal ring does not fall off or slip,
The tightness is uniformed to improve the sealing performance, and the insertion resistance is reduced to improve the workability, and the inner case is not deformed. Furthermore, by providing a circumferential annular groove on the outer peripheral surface of the seal portion, the lip is easily bent, so that the insertion resistance can be further reduced,
The assembly workability can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a seal portion showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a seal portion showing a second embodiment of the present invention.

FIG. 3 is a sectional view of a seal portion showing a third embodiment of the present invention.

FIG. 4 is a sectional view of a seal portion showing a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a seal portion showing a fifth embodiment of the present invention.

FIG. 6 (a) is a plan view showing an example of a conventional fuel tank valve. (b) A sectional view showing an example of a conventional fuel tank valve.

FIG. 7 is a sectional view of a seal portion of a conventional fuel tank valve.

[Explanation of symbols]

 Reference Signs List 11 seal ring 12 inner case 13 vent hole 14 annular groove 15 reinforcing ring 16 seal portion 16a, 16b, 16d, 16e lip 16c annular groove 17 outer case 18 cylindrical wall 19 nipple 21 seal ring 22 inner case 23 vent hole 24 annular wall 25 Reinforcing ring 26 Seal portion 26a, 26b Lip 26c Annular groove 27 Outer case 28 Cylindrical wall 29 Nipple 30 Annular wall 31 Nipple

Continuation of the front page (72) Inventor Taiki Aoyama 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (56) References JP-A-61-291217 (JP, A) JP-A-59-34932 (JP) , A) Japanese Utility Model 528732 (JP, U) Japanese Utility Model 63-19499 (JP, U) Japanese Utility Model 576841 (JP, U) Japanese Utility Model 2-127600 (JP, U) Japanese Utility Model 63-193183 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 15/00-15/06 F15D 1/06 F16J 15/10

Claims (4)

(57) [Scope of request for utility model registration] An inner case having a valve mechanism therein, an outer case having a piping nipple opposed to the fluid passage hole of the inner case, and an inner case and an outer case surrounding the fluid passage hole. A seal ring for sealing between the seal ring, the seal ring, a reinforcing ring, and an inner peripheral portion of the reinforcing ring
Or a seal portion formed of a rubber-like elastic body having one or more lips at a portion that is integrally formed on the outer peripheral portion and that contacts the inner case and the outer case , wherein the reinforcing ring is
Inner peripheral surface of annular groove provided on side wall of inner case, annular wall
Or a fuel tank valve fitted to the annular projection . An inner case having a valve mechanism therein;
Place the piping nipple facing the fluid passage hole in the inner case.
The outer case provided and the inside of the peripheral portion of the fluid passage hole.
A seal ring that seals between the case and the outer case
Wherein the seal ring comprises a reinforcing ring, and an inner peripheral portion of the reinforcing ring.
Molded into one piece and contacts the inner and outer cases
From a rubber-like elastic body with one or more lips
And the reinforcing ring is provided on the outer case.
For fuel tank fitted to the annular wall provided on the side wall
valve. An inner case having a valve mechanism therein;
Place the piping nipple facing the fluid passage hole in the inner case.
The outer case provided and the inside of the peripheral portion of the fluid passage hole.
A seal ring that seals between the case and the outer case
Wherein the seal ring comprises a reinforcing ring, and an outer peripheral portion of the reinforcing ring.
Molded into one piece and contacts the inner and outer cases
From a rubber-like elastic body with one or more lips
A nipple of the outer case.
Extending to the interior, wherein the reinforcing ring is of the nipple,
It is fitted around the outer periphery of the end located inside the outer case.
Fuel tank valve. 4. A fuel tank according to any one of claims 1 provided a circumferential annular groove in the outer or inner circumferential surface of which is not fixed to the reinforcing ring of the sealing portion to the 3 valve.