JPH11248020A - Gasket fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the pressure withstand performance of a gasket without enlarging the fastening torque for securing the gasket to a solenoid valve in such a condition as pinched by a base for piping. SOLUTION: A gasket 24 to seal the joining part between a passage in a solenoid valve 11 and a passage 16 in a manifold base 12 is joined with a plate 20A, which is secured to the solenoid valve 11 in such a condition as pinched by the solenoid valve and the manifold base 12. Thereby the gasket 24 is fixed to the valve 11 in such a condition as pinched by the solenoid valve and the manifold base 12, and it is possible to seal the joining part between the passage in the valve 11 and the passage 16 in the manifold base 12. At this time, the gasket 24 is integrated with the plate 20A, so that the pressure widthstand calculation of the gasket 24 can be performed not on the basis of the strength of the material of gasket 24 but on the material strength of stainless steel plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasket fixing structure for sealing a connecting portion between a flow path of an electromagnetic valve and a flow path of a piping base.

[0002]

2. Description of the Related Art Conventionally, in a solenoid valve, as shown in FIG. 7, when a solenoid valve 101 is mounted on a piping base 102, a connecting portion between a flow path 103 of the solenoid valve 101 and a flow path 104 of the piping base 102 is formed. Gasket 10 for sealing
5 was fixed while being sandwiched between the solenoid valve 101 and the piping base 102.

The electromagnetic valve 101 and the piping base 102
Is provided with a concave groove into which the gasket 105 is inserted. Therefore, when the solenoid valve 101 is attached to the piping base 102, the gasket 105 is displaced (different from the positional deviation in paragraph (0008) described later). Could be prevented.

FIG. 8 shows a pipe base 102 when a gasket 105 is inserted into a groove provided in the pipe base 102.
Is shown. The gasket 105 is connected to the flow path 10 of the solenoid valve 101.
Since this seals the connection between the pipe 3 and the flow path 104 of the pipe base 102, as shown in FIG.
No. 02 has a mesh-like outer shape surrounding each flow path 104.
Therefore, the piping base 10 into which the gasket 105 is inserted
The two concave grooves are also processed into a mesh shape surrounding each flow path 104 of the pipe base 102.

Incidentally, such a fixing structure of the gasket 105 is disclosed in detail in Japanese Patent Application Laid-Open No. Hei 8-93942.

[0006]

However, in the conventional structure for fixing the gasket 105, the gasket 105 is inserted into a groove provided in the solenoid valve 101 or the piping base 102, but the gasket 105 is not fixed to the solenoid valve 101. Therefore, the pressure resistance of the gasket 105 has to be calculated based on the strength of the material of the gasket 105 because the gasket 105 is only fixed while being sandwiched between the gasket 105 and the pipe base 102.

Therefore, in order to improve the pressure resistance of the gasket 105, the material of the gasket 105 may be changed. However, the gasket 105 is made of a thin elastic body having a thickness of about several mm. The material of the gasket 105 is restricted depending on the fixing structure of the gasket 105 and the use environment such as the type, properties and temperature of the fluid used, so that the pressure resistance of the gasket 105 cannot be further improved.

Therefore, the gasket 105 is connected to the solenoid valve 101.
Gasket 1 by increasing the tightening torque of mounting screws and the like that are fixed while being sandwiched between
05 withstand pressure performance was further improved. However, there is a limit in increasing the tightening torque.
It cannot withstand the fluid pressure leaking from the connecting portion between the first flow path 103 and the flow path 104 of the pipe base 102, so that the gasket 105 is displaced (different from the above-described paragraph (0003)) or broken. Occurred, and the required pressure resistance performance could not be sufficiently secured.

Accordingly, the present invention has been made to solve the above-mentioned problems, and has been made without increasing the tightening torque for fixing the gasket in a state sandwiched between the solenoid valve and the piping base. It is an object of the present invention to provide a gasket fixing structure that can further improve the pressure resistance performance of a gasket.

[0010]

According to a first aspect of the present invention, there is provided a gasket fixing structure for sealing a connecting portion between a flow path of a solenoid valve and a flow path of a piping base. A gasket fixing structure fixed between the solenoid valve and the pipe base in a state where the gasket is fixed to the plate fixed between the solenoid valve and the pipe base.

According to a second aspect of the present invention, there is provided the gasket fixing structure according to the first aspect, wherein the electromagnetic valve is provided with a convex portion provided on the plate and a concave portion into which the convex portion is press-fitted. Alternatively, it is provided on the pipe base. A gasket fixing structure according to a third aspect is the gasket fixing structure according to the second aspect, wherein the convex portion is made of an elastic body.

A gasket fixing structure according to a fourth aspect is the gasket fixing structure according to the first aspect, wherein the plate is provided with a pawl portion, and the pawl portion is engaged with the plate. A part is provided on the solenoid valve or the piping base.

In the gasket fixing structure of the present invention having such a configuration, a gasket for sealing a connecting portion between the flow path of the electromagnetic valve and the flow path of the piping base is joined to a plate, and this plate is connected to the electromagnetic valve. It is fixed while being sandwiched by the piping base. Thus, the gasket is fixed while being sandwiched between the solenoid valve and the pipe base, and can seal a connecting portion between the flow path of the solenoid valve and the flow path of the pipe base. At this time, since the gasket is integrated with the plate, the pressure resistance of the gasket can be calculated based on the strength of the material of the plate.

[0014] The material of the plate can be adapted to the use environment such as the type, properties and temperature of the fluid used.
Any material can be used as long as the gasket can be joined. For example, stainless steel, steel, phosphor bronze, copper, plastic, and the like are used. Further, the thickness of the plate is desirably small as long as the gasket satisfies the pressure resistance performance, from the viewpoint of preventing the solenoid valve from being enlarged and the ease of handling of the plate.

The positioning of the gasket is performed by press-fitting a convex portion provided on a plate to which the gasket is joined into a concave portion provided on the solenoid valve or the piping base. Alternatively, the engagement is provided by engaging an engaging portion provided on the plate to which the gasket is joined with an engaging portion provided on the solenoid valve or the pipe base. Further, when the press-fitting or the engagement is performed, the gasket keeps attached to the solenoid valve or the pipe base via the plate. Therefore, when attaching the solenoid valve to the pipe base, the displacement of the gasket is considered. No need. Thereby, a positioning function and a holding function for the gasket are secured.

That is, in the gasket fixing structure of the present invention, the gasket for sealing the connecting portion between the flow path of the solenoid valve and the flow path of the piping base is joined to the plate, so that the gasket is integrated with the plate. Withstand pressure calculation can be performed based on the strength of the plate, so it is possible to further improve the withstand pressure performance of the gasket without increasing the tightening torque for fixing the gasket between the solenoid valve and the piping base. it can.

In order to secure the positioning function and the holding function of the gasket by press-fitting the convex portion provided on the plate into the concave portion provided on the electromagnetic valve or the piping base, a concave portion is provided on the electromagnetic valve or the piping base. Only simple processing is required, and it is not necessary to process grooves formed around the solenoid valve or the pipe base in the solenoid valve or the pipe base. And the shape of the gasket corresponding to the arrangement can be designed without being restricted by the limit of the groove processing.

Further, if the convex portion provided on the plate is made of an elastic material, the concave portion provided on the solenoid valve or the pipe base will not be expanded even if the convex portion is press-fitted or removed many times. By replacing the plate to which the gasket is joined, the function of positioning and holding the gasket is not lost even if the gasket is replaced many times. In addition, as the material of the elastic body, nitrile rubber (NBR), hydrogenated rubber, fluorine rubber, silicon rubber, or the like is used according to the use environment such as the type, properties, and temperature of the fluid used.

Further, when the engaging function provided on the plate is engaged with the engaging means provided on the solenoid valve or the pipe base to secure the function of positioning and holding the gasket,
Only a simple process of providing an engaging portion for the solenoid valve or the pipe base is required, and it is not necessary to process a groove formed to surround the flow path of the solenoid valve or the pipe base in the solenoid valve or the pipe base. In addition, the arrangement of the flow path of the solenoid valve and the flow path of the pipe base and the shape of the gasket corresponding to the arrangement can be designed without being restricted by the limit of the groove processing.
The material of the hook portion is the same as the material of the plate, and for example, stainless steel, steel, phosphor bronze, copper, plastic, or the like is used.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view when the solenoid valve 11 is assembled by being fixed to a manifold base 12 which is a piping base, and shows a method of attaching the solenoid valve 11 to the manifold base 12. To attach the solenoid valve 11 to the manifold base 12, as shown in FIG.
1 through the mounting hole 14 of the manifold base 1
This is performed by screwing into the second mounting hole 15. In addition, 16
Is a flow path of the manifold base 12.

At this time, the plate 20A is fixed between the solenoid valve 11 and the manifold base 12 with the plate 20A interposed therebetween. Thus, the plate 20A will be described based on the perspective view of FIG. The plate 20A has a thickness of 0.
It is made of a stainless steel plate 21 of 2 mm to 0.7 mm, and has an opening 22 and a mounting hole 23. Also,
NBR which is a rubber material so as to surround the opening 22
The gasket 24 is joined to the plate 20A by vulcanization bonding. The gasket 24 has a thickness of about 0.3 mm to 0.5 mm and a width of about 0.5 mm, and is joined to both surfaces of the plate 20A.
The cross section of the gasket 24 has a shape similar to a rectangle.

Further, convex portions 25 are provided at the corners of the plate 20A by vulcanizing and bonding NBR which is a rubber material. The convex portion 25 is press-fitted into a concave portion (not shown) provided in the electromagnetic valve 11, whereby the plate 20 </ b> A can be brought into a state of being attached to the electromagnetic valve 11. When attaching to the manifold base 12, the plate 20A can be easily handled and the gasket 24 can be positioned via the plate 20A. At this time,
The mounting hole 23 of the plate 20A is the mounting hole 1 of the solenoid valve 11.
4, the mounting screw 13 inserted through the mounting hole 14 of the solenoid valve 11 also inserts through the mounting hole 23 of the plate 20A, and then screwed into the mounting hole 15 of the manifold base 12.

Further, when the electromagnetic valve 11 is mounted on the manifold base 12, a connecting portion between the flow path (not shown) of the electromagnetic valve 11 and the flow path 16 of the manifold base 12 is provided in the opening 22 of the plate 20A. Since the gasket 24 is present, the gaskets 24 joined to both surfaces of the plate 20A so as to surround the opening 22 can surround the connecting portion between the flow path (not shown) of the solenoid valve 11 and the flow path 16 of the manifold base 12. .

Therefore, in the present embodiment, the gaskets 24 joined to both surfaces of the plate 20A are positioned while being pressed by the projections 25 of the plate 20A into the recesses (not shown) of the solenoid valve 11 while the electromagnetic force is applied. Valve 11
Is fixed between the solenoid valve 11 and the manifold base 12 with a tightening torque of a mounting screw 13 for mounting the solenoid valve 11 to the manifold base 12.

As described in detail above, in the fixing structure of the gasket 24 according to the present embodiment, the gasket 24 for sealing the connecting portion between the flow path (not shown) of the solenoid valve 11 and the flow path 16 of the manifold base 12. Is fixed to the plate 20A while the plate 20A is sandwiched between the solenoid valve 11 and the manifold base 12. As a result, the gasket 24 is fixed while being sandwiched between the electromagnetic valve 11 and the manifold base 12, and the flow path (not shown) of the electromagnetic valve 11 and the flow path 16 of the manifold base 12 are fixed.
Can be sealed. At this time, since the gasket 24 is integrated with the plate 20A, it is possible to calculate the pressure resistance of the gasket 24 based on the strength of the stainless steel that is the material of the stainless steel plate 21 instead of the strength of the NBR that is the material of the gasket 24. it can.

The positioning of the gasket 24 is performed by press-fitting a convex portion 25 provided on the plate 20A to which the gasket 24 is joined into a concave portion (not shown) provided in the solenoid valve 11. Further, when this press-fitting is performed, the gasket 24 continues to be attached to the solenoid valve 11 via the plate 20A. Therefore, when attaching the solenoid valve 11 to the manifold base 12, the displacement of the gasket 24 is considered. No need. Thereby, a positioning function and a holding function for the gasket 24 are secured.

That is, the gasket 24 of the present embodiment
The gasket 24 is integrated with the plate 20A by joining a gasket 24 that seals a connecting portion between the flow path (not shown) of the solenoid valve 11 and the flow path 16 of the manifold base 12 to the plate 20A. Since the pressure resistance calculation of the gasket 24 can be performed based on the strength of stainless steel, which is the material of the stainless steel plate 21,
Gasket 24 is connected to solenoid valve 11 and manifold base 12
The pressure resistance of the gasket 24 can be further improved without increasing the tightening torque of the mounting screw 13 for fixing the gasket 24 between the gaskets.

When the positioning function and the holding function of the gasket 24 are secured by press-fitting the projection 25 provided on the plate 20A into a recess (not shown) provided on the solenoid valve 11, On the other hand, a simple process of providing a concave portion (not shown) is sufficient, and a groove formed so as to surround the flow path (not shown) of the electromagnetic valve 11 or the flow path 16 of the manifold base 12 is formed by the electromagnetic valve 11 or the manifold base. 1
2, the arrangement of the flow path (not shown) of the electromagnetic valve 11 and the flow path 16 of the manifold base 12 and the shape of the gasket 24 corresponding to the arrangement are restricted by the limit of the groove processing. It can be designed without having to.

Further, the protrusion 25 provided on the plate 20A is provided.
Is made of rubber NBR, which is an elastic body, so that no matter how many times the protrusion 25 is press-fitted or removed, the recess (not shown) provided in the solenoid valve 11 is not expanded. By replacing the plate 20A to which the gasket 24 is joined, the positioning function and the holding function with respect to the gasket 24 are not lost even if the gasket 24 is replaced with a new one.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention.

For example, in the fixing structure of the gasket 24 of the present embodiment, as shown in FIG. 2, the positioning of the gasket 24 is performed by joining the gasket 24 to a concave portion (not shown) provided in the solenoid valve 11. 6 is press-fitted to the plate 20A. As shown in FIG. 6, the positioning of the gasket 24 is performed by the electromagnetic valve 11.
Gasket 24 with respect to an engaging portion (not shown) provided in
May be engaged by engaging a pawl portion 26 provided on the plate 20B to which is joined.

Even in such a case, only a simple process of providing an engaging portion (not shown) for the solenoid valve 11 is required, and the flow path (not shown) of the solenoid valve 11 or the manifold base 12 is required.
Since it is not necessary to form a groove formed to surround the flow path 16 of the electromagnetic valve 11 or the manifold base 12, the flow path (not shown) of the electromagnetic valve 11 and the flow path 16 of the manifold base 12 are formed. The arrangement and the shape of the gasket 24 corresponding to the arrangement can be designed without being restricted by the limit of the groove processing.

In the fixing structure of the gasket 24 according to the present embodiment, the cross section of the gasket 24 has a shape similar to a rectangle. However, as shown in FIG. In this case, the shape of the gasket 24 is easily deformed elastically, and the tightening torque of the mounting screw 13 acts intensively at the center of the gasket 24, so that the solenoid valve 11 and the manifold base 12 The gasket 24 is easily pressed against this. Further, the one shown in FIGS. 4 and 5 may be used. Also in these cases, the shape of the gasket 24 is easily elastically deformed, and the tightening torque of the mounting screw 13 acts on a part of the gasket 24, so that the solenoid valve 11 and the manifold base It is easy to press the gasket 24 against 12.

In the fixing structure of the gasket 24 of the present embodiment, the projection 25 provided on the plate 20A has a cubic shape, but is pressed into a recess (not shown) provided on the solenoid valve 11. It may have any shape as long as it can be formed.

Further, in the fixing structure of the gasket 24 of the present embodiment, the solenoid valve 11 has a concave portion (not shown) into which the convex portion 25 of the plate 20A is press-fitted. Good. Similarly, the above-described engaging portion (not shown) of the plate 20 </ b> B may be provided on the manifold base 12.

Further, the convex portions 25 are provided on both surfaces of the plate 20A, and the concave portions (not shown) into which the convex portions 25 of the plate 20A are press-fitted also include the solenoid valve 11 and the manifold base 1.
2, the projections 2 of the plate 20A are provided.
Gasket 2 is inserted into one of the recesses (not shown) into which
When the electromagnetic valve 11 is fixed to the manifold base 12 at the other side of the concave portion (not shown) into which the convex portion 25 of the plate 20A is press-fitted, the electromagnetic valve 11 A guide function for guiding the mounting position may be provided. Further, the same applies to the case where the projection 25 is provided on one surface of the plate 20A, and the hook 26 is provided on the other surface of the plate 20A. These facts are based on the engaging portion 26 of the plate 20B and the engaging portion (not shown) with which the engaging portion 26 of the plate 20B is engaged.
Can also be said against.

In the gasket 24 fixing structure of the present embodiment, the manifold base 1 is used as a piping base.
Although the description is made using 2, a single unit may be used.

[0038]

According to the gasket fixing structure of the present invention, the gasket for sealing the connecting portion between the flow path of the solenoid valve and the flow path of the piping base is joined to the plate, so that the gasket is integrated with the plate. Withstand pressure calculation can be performed based on the strength of the plate, so it is possible to further improve the withstand pressure performance of the gasket without increasing the tightening torque for fixing the gasket between the solenoid valve and the piping base. it can.

When the positioning function and the holding function of the gasket are secured by press-fitting the convex portion provided on the plate into the concave portion provided on the solenoid valve or the piping base, a concave portion is provided on the solenoid valve or the piping base. Only simple processing is required, and it is not necessary to process grooves formed around the flow path of the piping base into the piping base. The shape of the corresponding gasket can be designed without being restricted by the limitations of the groove processing.

Furthermore, if the convex portion provided on the plate is made of an elastic material, the concave portion provided on the solenoid valve or the piping base will not be expanded even if the convex portion is press-fitted or removed many times. By replacing the plate to which the gasket is joined, the function of positioning and holding the gasket is not lost even if the gasket is replaced many times.

Further, when the engaging function provided on the plate is engaged with the engaging means provided on the solenoid valve or the piping base to secure the function of positioning and holding the gasket,
Only a simple process of providing an engaging portion for the solenoid valve or the pipe base is required, and it is not necessary to process a groove formed to surround the flow path of the solenoid valve or the pipe base in the solenoid valve or the pipe base. In addition, the arrangement of the flow path of the solenoid valve and the flow path of the pipe base and the shape of the gasket corresponding to the arrangement can be designed without being restricted by the limit of the groove processing.

[Brief description of the drawings]

FIG. 1 is a perspective view when an electromagnetic valve is assembled by being fixed to a manifold base, showing a method of attaching the electromagnetic valve to the manifold base.

FIG. 2 is a perspective view showing an example of a plate.

FIG. 3 is a diagram showing an example of a cross section of a gasket joined to a plate.

FIG. 4 is a diagram showing an example of a cross section of a gasket joined to a plate.

FIG. 5 is a diagram showing an example of a cross section of a gasket joined to a plate.

FIG. 6 is a perspective view showing an example of a plate.

FIG. 7 is a cross-sectional view when a solenoid valve is attached to a piping base in the related art.

FIG. 8 is a view showing a pipe base when a gasket is inserted into a concave groove provided in the pipe base in a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Solenoid valve 12 Manifold base 16 Channel of manifold base 20A, 20B Plate 24 Gasket 25 Convex part 26 Engagement part

Claims (4)

[Claims] 1. A gasket fixing structure for fixing a gasket for sealing a connecting portion between a flow path of a solenoid valve and a flow path of a pipe base while sandwiching the gasket between the solenoid valve and the pipe base. A gasket fixing structure, wherein the gasket is joined to a plate fixed while being sandwiched between bases. 2. The gasket fixing structure according to claim 1, wherein a convex portion is provided on the plate, and a concave portion into which the convex portion is press-fitted is provided on the solenoid valve or the pipe base. Fixed structure. 3. The gasket fixing structure according to claim 2, wherein the convex portion is made of an elastic material. 4. The gasket fixing structure according to claim 1, wherein a hook portion is provided on the plate, and an engaging portion with which the hook portion engages is provided on the solenoid valve or the pipe base. A gasket fixing structure characterized by the following.