JPH09329266A - Seal structure between members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal structure between members to have excellent pressure resistance and cost properties and facilitate manufacture. SOLUTION: A gasket 21 is located between the jointing faces 19e and 20a of a plurality of members 19 and 20. Flow passage forming holes 29 and 30 are opened at the two faces 19e and 20a. A flow passage forming holes 29 and 30 are opened to the two joints 19e and 20a. A flow passage consists of the flow passage forming holes 29 and 30 and the communication hole 81 of the gasket 21. A chamfer part 49 is formed at the opening edges of the flow passage forming holes 29 and 30. An engaging part 82 engageable with the chamfer part 49 is arranged at the peripheral edge of the communication hole 81. As a result, sealing between the members 19 and 20 is effected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure between members, and more particularly, to a seal structure in which a gasket is interposed between a solenoid valve and a valve block constituting a solenoid valve manifold.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic valve manifold is known in which a large number of manifold blocks each including an electromagnetic valve and a valve block are connected in series. The solenoid valve used in this type usually has a plurality of flow passage forming holes. On the other hand, in the valve block joined to this solenoid valve, a plurality of flow passage forming holes are formed at positions corresponding to the flow passage forming holes on the solenoid valve side. Therefore, when the solenoid valve and the valve block are joined, a flow path is formed so as to penetrate them. Further, a gasket having a communication hole is interposed between the joint surface of the solenoid valve and the joint surface of the valve block, thereby improving the sealing property of the interface. Hereinafter, some conventional seal structures between the solenoid valve 102 and the valve block 101 will be illustrated.

In the first prior art shown in FIG. 13, a gasket fitting groove 103 is formed in the joint surface 101a on the valve block 101 side, and a gasket 104 having a substantially elliptical cross section is fitted in the groove 103. There is.

In the second prior art shown in FIG. 14, the joint surface 101a on the valve block 101 side and the joint surface 102a on the solenoid valve 102 side are both kept flat. However, in this conventional technique, a gasket 105 having a modified cross section having a thick portion is used.

In addition to these two examples, for example, one using a mesh-shaped and flat gasket is known (third prior art).

[0006]

However, when the solenoid valve manifold is used under high pressure, in the second conventional technique and the third conventional technique, the gasket 105 may be displaced during or after the assembling. , The sealing property is easily damaged. Therefore, it is hard to say that these are seal structures having excellent pressure resistance.

The first conventional technique having the gasket fitting groove 103 has a structure in which the displacement of the gasket 105 is unlikely to occur, and therefore is superior in pressure resistance to the above two conventional techniques. However, the first conventional technique also has the following drawbacks.

That is, in order to secure a large flow passage forming hole in the solenoid valve manifold, the wall partitioning the flow passage forming hole 106 of the valve block 101 must be formed thin.
Then, the width of the opening edge of the adjacent flow path forming hole 106 also becomes narrow. Therefore, even if the valve block 101 is manufactured by a die molding method such as die casting, simultaneous molding of the gasket fitting groove 103 becomes extremely difficult. Further, even if the groove processing is performed after the die-cast molding, the difficulty of manufacturing is still unsolved. In addition, the cost is increased due to the additional groove processing required.

The present invention has been made to solve the above problems, and an object thereof is to provide a seal structure between members which is excellent in pressure resistance and cost and is easy to manufacture.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 forms a flow path in which a gasket is interposed between the joint surfaces of a plurality of members and the joint surfaces are open. In a seal structure in which a flow path is formed by a hole and a communication hole of the gasket, a chamfered portion is formed at an opening edge of the flow channel formation hole, and a chamfered portion is engageable with a peripheral edge of the communication hole. The gist is a seal structure between members, which is characterized in that a joint portion is provided.

According to a second aspect of the present invention, in the first aspect, the member is a die-molded product manufactured by die-molding, and the chamfered portion is formed simultaneously with the die-molding of the member. And

According to a third aspect of the present invention, in the first or second aspect, the engaging portion is a convex engaging portion projecting over the entire periphery of the communicating hole. The invention according to claim 4 is the method according to any one of claims 1 to 3,
The gasket is provided with a misalignment prevention part in addition to the engagement part.

According to a fifth aspect of the present invention, in the fourth aspect, the positional deviation prevention portion is an engagement projection that is provided to project from a base portion of the gasket in a thickness direction, and the joint surface of the member has It is assumed that an engagement hole with which the engagement protrusion engages is provided.

According to a sixth aspect of the present invention, in the fourth aspect, the position shift prevention portion is an engaging protrusion protruding from the base of the gasket in the outer peripheral direction, and the engaging protrusions are adjacent to each other. It is supposed to be engaged with a part of the gasket.

The operation of the invention described in each of the above claims will be described below. According to the invention described in claims 1 to 6, since the chamfered portion is provided at the opening edge of the flow path forming hole that is opened in the member, the flat surface on the joint surface of the member, that is, the surface for tightening the gasket is It decreases relatively. as a result,
The tightening force of the gasket per unit area becomes strong and high sealing performance is secured. Further, with such a seal structure in which the engaging portion engages with the chamfered portion, displacement of the gasket is reliably prevented even when used under high pressure. Therefore, since the gasket is held at a fixed position, a suitable sealing property is maintained, and the pressure resistance is also improved. Since the gasket is held in place not only after the assembling but also during the assembling, the gasket is prevented from slipping and falling off, and the assembling can be performed easily and surely. Further, with such a seal structure, unlike the conventional case, the groove processing is not required, so that the manufacturing of the member is facilitated and the cost increase is avoided.

According to the second aspect of the present invention, since the chamfered portion is also formed at the time of molding the member with the die, the chamfering process is temporarily performed after the die molding, as compared with the case where the chamfering process is performed. The number of man-hours surely decreases. Therefore, it is possible to further facilitate the manufacturing and reduce the cost.

According to the third aspect of the invention, when the engaging portion is present over the entire periphery of the communication hole, the gasket is unlikely to be displaced in any direction during and after the assembling. . Therefore, the pressure resistance and the assembling property are further improved. Further, since the engagement portion is convex, the gasket can be manufactured relatively easily.

According to the fourth aspect of the present invention, the presence of the position deviation prevention portion can prevent the position deviation of the gasket during and after assembly more reliably. Therefore, the pressure resistance and the assembling property are further improved.

According to the fifth aspect of the present invention, the engagement protrusion of the gasket engages with the engagement hole provided in the joint surface, so that the gasket is more reliably displaced during and after assembly. To be prevented. Therefore, the gasket is held in place.

According to the invention described in claim 6, the engaging projection is engaged with a part of the adjacent gaskets,
The position shift of the gasket can be more reliably prevented during and after the assembling. Therefore, the gasket is held in place.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS. For convenience of explanation, the front side of FIG.
In the following description, the right side is the right side and the left side is the left side.

1 and 2 show a solenoid valve manifold 1. As shown in FIG. 3, the solenoid valve manifold 1
Is configured by connecting the supply / discharge end block 2, the wiring block 3, the plurality of manifold blocks 4 and the end block 5. The supply / discharge end block 2, the wiring block 3, each manifold block 4, and the end block 5 are connected to each other by a connecting member 7 with a gasket 6 interposed therebetween. An integrated wiring cover 8 is attached to the rear side of the solenoid valve manifold 1.

The supply / discharge end block 2 is provided with a central air supply port 9, a central first exhaust port 10, a central second exhaust port 11, a central pilot exhaust port 12 and a central pilot air supply port 13.

The wiring block 3 has a central air supply passage 1
4, a first central exhaust passage 15, a second central exhaust passage 16, a central pilot exhaust passage 17, and a central pilot air supply passage 18. The centralized flow paths 14 to 18 communicate with the centralized ports 9 to 13 of the supply / discharge end block 2. That is, the central air supply passage 14 is communicated with the central air supply port 9. Further, the first concentrated exhaust passage 15 communicates with the first concentrated exhaust port 10, and the second concentrated exhaust passage 16 communicates with the second concentrated exhaust port 11. The centralized pilot exhaust passage 17 communicates with the centralized pilot exhaust port 12, and the centralized pilot air supply passage 18 communicates with the centralized pilot air supply port 13.

The manifold block 4 includes a valve block 19 and an electromagnetic directional control valve (hereinafter simply referred to as an electromagnetic valve) 2
It is composed of 0 and. The valve block 19 and the solenoid valve 20 are connected via a gasket 21.

The valve block 19 has a central air supply passage 2
2, a first concentrated exhaust passage 23, a concentrated second exhaust passage 24, a concentrated pilot exhaust passage 25, and a concentrated pilot air supply passage 26. Each flow path 22 to 26 of the valve block 19
Are communicated with the respective concentrated flow paths 14 to 18 of the wiring block 3. That is, the centralized air supply passage 22 communicates with the centralized air supply passage 14. The first concentrated exhaust passage 23 communicates with the first concentrated exhaust port 15, and the second concentrated exhaust passage 24 communicates with the second concentrated exhaust port 16.
The centralized pilot exhaust passage 25 communicates with the centralized pilot exhaust passage 17, and the centralized pilot air supply passage 26 communicates with the centralized pilot air supply passage 18, respectively.

As shown in FIG. 1, the valve block 19 has an output A port 27 and an output B port 2 on its front side.
8 is provided. Both output ports 2 of each valve block 19
7, 28 are connected in a pair to an external actuator (not shown).

Further, as shown in FIGS. 3, 5 and 8, the valve block 19 includes an air supply hole 29, a first exhaust hole 30,
The second exhaust hole 31, the output A hole 32, the output B hole 33, the pilot exhaust hole 50, and the pilot air supply hole 51 are provided. These holes 29 to 33, 50 as flow path forming holes,
51 is open on the upper side surface 19 e of the valve block 19. The upper side surface 19e will be referred to as the joint surface 19e of the valve block 19. Each hole 30-33,
The valves 50 and 51 are in communication with the centralized flow passages 22 to 26 inside the valve block 19, respectively. That is, the air supply hole 29 is in the central air supply flow path 22, the first exhaust hole 30 is in the first exhaust flow path 23, the second exhaust hole 31 is in the second exhaust flow path 24, and the output A hole 32 is the output. The A port 27 and the output B hole 33 are connected to the output B port 28, respectively. Further, the pilot exhaust hole 50 communicates with the centralized pilot exhaust passage 25, and the pilot air supply hole 51 communicates with the centralized pilot air supply passage 26.

The solenoid valve 20 is a pilot-driven 5-port 2-position or 3-position solenoid directional control valve. Solenoid valve 20
Has seven flow path forming holes (not shown). Each of these flow path forming holes opens on the lower surface of the solenoid valve 20 and serves as seven ports (not shown). Further, these seven ports are provided with the air supply hole 29, the first exhaust hole 30,
It is formed at a position corresponding to the second exhaust hole 31, the output A hole 32, the output B hole 33, the pilot exhaust hole 50, and the pilot air supply hole 51. Therefore, at the time of connection, the ports and the holes 29 to 33, 50, and 51 are aligned with each other and are in communication with each other, thereby forming a plurality of flow paths. In addition, such a lower side surface 20a will be referred to as a joint surface 20a of the solenoid valve 20.

The end block 5 is similar to the end block 2 in that each of the central flow passages 22 to 2 of each valve block 4 is connected.
It is equipped with a port communicating with 6. Each solenoid valve 20 of each manifold block 4 is connected to the wiring block 3 and a feeder line with connectors on both sides (hereinafter, simply referred to as a feeder line) 34. The solenoid valve 20 is connected to the solenoid valve side connector 35 of the power supply line 34.

The wiring block 3 inputs a drive signal corresponding to each solenoid valve 20 from an external sequencer or the like. The wiring block 3 outputs each drive signal to each solenoid valve 20 via the power supply line 34 connected to the corresponding solenoid valve 20.

Each solenoid valve 20 outputs the air supply hole 29 of the valve block 19 connected by the drive signal to the output A hole 32.
And the output B hole 33 communicates with the second exhaust hole 31. Further, the solenoid valve 20 connects the air supply hole 29 to the output B hole 33 by the drive signal and outputs the output A hole 32.
To the first exhaust hole 30.

Therefore, the solenoid valve manifold 1 supplies the air supplied from the centralized air supply port 9 to each valve block 19.
Introduced into the central air supply passage 22 of. Then, the air is led to the outside from one of the output A port 27 and the output B port 28 of each valve block 19. At the same time, the solenoid valve manifold 1 introduces air from the other output port 27, 28. Then, the air is supplied to the first central exhaust passage 23 or the second central exhaust passage 24 of each valve block 19 from the first central exhaust passage 23.
It is led to the central exhaust port 10 or the second central exhaust port 11.

Next, the structure of the valve block 19 will be described with reference to FIGS.
Details will be described with reference to FIG. The valve block 19 is a mold-molded product manufactured by die casting, which is a type of mold molding. As shown in FIG. 6, each hole 2 that is a flow path forming hole
A chamfered portion 49 is provided on the opening edges of 9 to 33, 50, and 51. The chamfered portion 49 is formed over the entire circumference of the opening edge. In the case of the present embodiment, the chamfered portion 4
9 is formed at the same time when the valve block 19 as a member is molded.

Here, the inclination angle of the chamfered portion 49 with respect to the joint surface 19e is 20 ° to 70 °, preferably 30 ° to.
It is 60 °, particularly preferably 40 ° to 50 °. Also,
The width d of the flat portion located between the adjacent chamfered portions 49 on the joint surface 19e is 0.5 mm to 1.5 mm, preferably 0.7 mm to 1 mm. In this embodiment, the inclination angle is set to 45 ° and the width d is set to 0.9 mm.

As shown in FIG. 5, the valve block 19
At the outer periphery of the portion in which the holes 29 to 33, 50, 52 are provided, the oblique chamfered portion 19c is also provided. An engagement hole 19d is formed in the joint surface 19e of the valve block 19. A first engagement structure, which will be described later, which is a position shift prevention portion, can be engaged with these engagement holes 19d. Further, the valve block 19 is provided with a pair of female screw holes 52 on the upper side surface thereof for connecting the solenoid valve 20. Further, the joint surface 19e of the valve block 19 is provided with a pair of female screw holes 53 for connecting a spacer (not shown).
Is provided separately from the female screw hole 52. This spacer is interposed between the valve block 19 and the solenoid valve 20 as required, and each of the holes 2 of the valve block 19 is
It has a function of externally restricting communication between 9 to 33 and each port of the solenoid valve 20.

Here, the connecting structure by the connecting portions 54 and 55 and the connecting member 7 will be described in detail. As shown in FIG. 8, the connecting portion 55 includes a connecting plate accommodating portion 62, a connecting piece 63, and a connecting plate holding portion 64. As shown in FIG. 7A, when the pair of valve blocks 19 are connected, the connecting plate accommodating portion 62 of each adjacent valve block 19 forms a recess.
Further, each connecting piece 63 of the adjacent valve blocks 19 forms a bolt hole at the center and also forms a holding chamber communicating with the bolt hole. On the other hand, the connecting portion 54 is composed of only the connecting piece 63 and the connecting plate holding portion 64.

As shown in FIGS. 3 and 8, the connecting member 7
Is composed of an outer connecting plate 65 having an insertion hole in the center, an inner connecting plate 66, and a connecting bolt 67. A female screw hole is formed in the center of the inner connecting plate 66. The connecting bolt 67 is inserted through the insertion hole of the outer connecting plate 65 and screwed into the female screw hole of the inner connecting plate 66. When the two valve blocks 19 are connected, the inner connecting plate 66 is held by the holding chamber formed by the adjacent connecting plate holding portions 64. Further, the outer connecting plate 65 is housed in the recess formed by the adjacent connecting plate housings 62. At this time, the pair of connecting pieces 63 is sandwiched by both locking pieces of the outer connecting plate 65. Then, when the outer connecting plate 65 and the inner connecting plate 66 are connected by the connecting bolt 67, the both connecting pieces 63 are tightly connected to each other. Therefore, the adjacent valve blocks 19 are connected to each other.

Next, the structure of the gasket 21 interposed between the valve block 19 and the solenoid valve 20 is shown in FIGS.
According to. As shown in FIG. 9, the gasket 21
Has a plate-shaped base portion 80. The base 80 has a communication hole 8
1 is formed. The communication hole 81 is plural,
The valve block 19 is formed at positions corresponding to the holes 29 to 33, 50, and 51. The gasket 21 has an engaging portion 82. As shown in FIG. 10, the engaging portion 82 has a convex shape and is provided so as to project from the base portion 80 of the gasket 21 in the thickness direction. These convex engaging portions 82 are provided so as to project over the entire periphery of each communication hole 81.

The gasket 21 is provided with a plurality of convex engaging portions 82a in addition to the convex engaging portions 82. These convex engaging portions 82a project from the base 80,
It engages with the chamfered portion 19c of the joint surface 19e. Further, the gasket 21 is provided with the engagement protrusion 8 as the first engagement structure.
2b is provided separately from the convex engagement portion 82. A plurality of the engaging projections 82b are provided and project from the base 80 in the thickness direction. These engagement protrusions 82b can be engaged with the engagement holes 19d. As shown in FIG. 10, the protrusion amount from the base portion 80 is the largest in the engagement protrusion 82b, and the largest in the convex engagement portion 82.

As shown in FIG. 11, the gasket 21 is
When the communication holes 81 are arranged so as to face the corresponding holes 29 to 33, 50, and 51, the convex engaging portion 82 is provided in the holes 29.
The chamfered portions 49 of 33, 50 and 51 are engageable. At the same time, each convex engaging portion 82a engages with the chamfered portion 19c, and each engaging protrusion 82b engages with each engaging hole 19d. At this time, the flat surface portion between the opening edges of the holes 29 to 33 comes into contact with the base portion 80 of the gasket 21, whereby a tightening force is applied to the gasket 21.
For this reason, the gasket 21 is held in a fixed position regardless of whether it is assembled or not. In addition, in the gasket 21 of FIG. 11, there is some play between the convex engagement portion 82 and the chamfered portion 49. Therefore, in the gasket 21, the convex engaging portion 82 moves a little in the horizontal direction to come into contact with the chamfered portion 49. This amount of movement is sufficiently smaller than the amount of movement at the time of displacement. Figure 12
In addition, a gasket 21A obtained by slightly modifying the gasket 21 of the embodiment is shown for reference. This gasket 21
Then, no play is provided between the convex engaging portion 82 and the chamfered portion 49. Therefore, the convex engaging portion 82 is immovable and is always in contact with the chamfered portion 49. In this respect, the gasket 21A is structurally advantageous.

When the gasket 21 is interposed between the joint surfaces 19e and 20a as described above, the valve block 1
A plurality of flow paths are formed between the solenoid valve 9 and the solenoid valve 20. That is, a fluid such as air is supplied to the valve block 19 side or the solenoid valve 20 through the communication hole 81 of the gasket 21.
It becomes a state that can be distributed to the side.

Now, the characteristic effects of the present embodiment will be enumerated below. (A) In the seal structure between members of the present embodiment, the chamfered portion 49 is formed at the opening edge of each of the holes 29 to 33, 50, 51 of the valve block 19. Further, a convex engaging portion 82 that can engage with the chamfered portion 49 is provided on the peripheral edge of the communication hole 81 of the gasket 21. Therefore, the chamfered portion 4
Compared with the configuration in which 9 is not formed, the flat surface on the joint surface 19e of the valve block 19, that is, the surface for tightening the gasket 21 is relatively reduced. As a result, the tightening force of the gasket 21 per unit area becomes strong, and the valve block 1
A high sealing property is secured between the joint surface 19e of 9 and the joint surface 20a of the solenoid valve 20.

Further, with such a seal structure in which the convex engaging portion 82 engages with the chamfered portion 49, the displacement of the gasket 21 is surely prevented even when used under high pressure. It That is, even if the gasket 21 tries to largely move in the horizontal direction with respect to the joint surface 19e due to the high pressure, the convex engaging portion 82 comes into contact with the chamfered portion 49 with only a slight movement. Therefore, further movement is restricted, and the displacement does not occur. Therefore, the gasket 21 is held in a fixed position after the assembling, and the preferable sealing property is maintained. And, with this, the pressure resistance is also improved. Also, with such a seal structure,
Even when assembled, the gasket 21 keeps the valve block 1
There is an advantage that it is difficult to shift from the fixed position of 9. Therefore, the gasket 21 can be easily and surely assembled, and the assemblability is improved. Comparing the gasket 21 of FIG. 11 with the gasket 21A of FIG. 12, it can be said that the latter is more suitable for improving the pressure resistance and the assembling property.

Furthermore, with such a seal structure,
Since only die-cast molding is sufficient for manufacturing, groove processing is not required unlike the conventional method. Therefore, the valve block 19 can be easily manufactured, and high cost can be avoided.

(B) In this embodiment, the chamfered portion 49 is also formed at the same time when the valve block 19 is die cast.
Therefore, the number of man-hours is surely reduced as compared with the case where the procedure of separately performing chamfering after die-cast molding is adopted. Therefore, further manufacturing simplification and cost reduction are achieved.

Further, the holes 29 to 33 of the valve block 19,
If the opening edges of 50 and 51 become the chamfered portions 49, burrs due to die-cast molding are less likely to occur at the opening edges. Therefore, deburring after die casting is not necessary, which also reduces man-hours.

(C) In the gasket 21 of this embodiment,
The convex engaging portion 82 exists over the entire periphery of the communication hole 81. Therefore, the gasket 21 is unlikely to be displaced in any direction during and after the assembling, so that the pressure resistance and the assembling property are further improved. Further, since the convex engaging portion 82 is used, the gasket 21 is relatively easy to manufacture as compared with, for example, a concave engaging portion. Therefore, further facilitation of manufacturing is achieved.

(D) In this embodiment, the engaging projection 82b as a position shift preventing portion is provided on the gasket 21 and the engaging hole 19d is provided on the joint surface 19e of the valve block 19. Therefore, by engaging the engaging protrusions 82b with the engaging holes 19d, it is possible to more reliably prevent the displacement of the gasket 21 during and after the assembling. Therefore, the gasket 21 is held in a fixed position, and the pressure resistance and the assembling property are further improved.

(E) In this embodiment, the convex engaging portion 82a that engages with the chamfered portion 19c of the valve block 19 is provided. Then, such a convex engaging portion 82 a is provided with the chamfered portion 19.
By engaging with c, the displacement can be prevented to some extent. This contributes to improvement of pressure resistance and assembling property.

(F) In this embodiment, female screw holes 5 for bolts for fixing the solenoid valve 20 are provided on the upper surface of the valve block 19.
In addition to 2, a female screw hole 53 for fixing the spacer is provided. Therefore, when the spacer is provided between the solenoid valve 20 and the valve block 19, the solenoid valve 20 can be replaced without removing the spacer. As a result, for example, when the air supply hole 29 is sealed by a spacer, the air supply hole 2 is replaced by the spacer even when the solenoid valve 20 is replaced.
The sealed state of 9 can be maintained. Therefore, the exchange can be performed in a state where the solenoid valves 20 other than the solenoid valve 20 to be exchanged are still operated.

When the spacer is not provided, the female screw hole 53 may be used as an engaging hole for engaging the engaging protrusion 82b. That is, the female screw hole 53
Can be used not only for fixing the spacers but also for preventing displacement of the gasket 21. Therefore, the number of holes formed in the joint surface 19e can be reduced.

The present invention is not limited to the above embodiment, but may be configured as follows. ◎ In place of the embodiment in which the chamfered portion 49 is simultaneously molded at the time of molding the valve block 19, the chamfered portion 49 is formed, for example, by chamfering the opening edge after molding the mold. May be.

The convex engagement portion 82 of the gasket 21 does not necessarily have to project over the entire circumference of the opening edge, but may partially project. The structure corresponding to the engagement hole 19d may be provided on the gasket 21 side, and the structure corresponding to the engagement protrusion 82b may be provided on the valve block 19 side. Alternatively, the engaging projection 82b may be a ridge and the engaging hole 19d may be groove-shaped.

The convex engagement portion 82 protruding from the gasket 21 is not limited to the one in the non-contact state when no fluid is supplied and the one in the fluid supply state as in the embodiment. is not. Therefore, it may be in the contact state even when the fluid is not supplied.

The displacement prevention section may be configured as follows. That is, the engaging protrusion is provided so as to protrude from the base of the gasket 21 in the outer peripheral direction. Then, the engaging projection piece is engaged with the outer peripheral portion of another adjacent gasket 21. In this case, an engaged recess or the like may be provided on the outer peripheral portion. With this configuration, the engaging protrusion is engaged with a part of the gasket 21, so that the gasket 21
The position shift of is reliably prevented. Therefore, the gasket 21 can be held in a fixed position without the engagement protrusion 82b and the like shown in the above embodiment. In addition,
The convex engagement portion 82a provided on the gasket 21 of the above-described embodiment may be used as the position shift prevention portion here.

In the above-described embodiment, the present invention is an electromagnetic valve manifold 1 including an internal pilot-driven electromagnetic valve 20.
It is a materialized form of. However, the present invention may be embodied in an external pilot-driven solenoid valve or a solenoid valve manifold including a direct-drive solenoid valve.

◎ The convex engaging portion 8 provided on the gasket 21
2a and the engaging projection 82b may be omitted, and only the convex engaging portion 82 may be provided. Even in this case, when the gasket 21 is assembled to the valve block 19, the gasket 2
1 can be held in place.

The solenoid valve manifold 1 is not limited to air as in the embodiment, but may be a gas other than air, and may be a liquid such as water. That is, it can be used for various fluids.

The present invention is not only applied to the seal structure between the two members as exemplified in the embodiment, but is, for example, three or more (3,4,5,6,7,8,9 ...). It can be applied to a seal structure between members.

The technical ideas other than the claims that can be understood from the above-described embodiment will be described below along with their effects. (1) In claim 4, the displacement prevention portion is a first engagement structure provided on a base portion of the gasket,
A seal structure between members, wherein a second engaging structure for engaging the first engaging structure is provided on the joint surface of the member. With this structure, the displacement of the gasket can be more surely prevented by the engagement between the engagement structures, and thus the gasket can be held at the fixed position.

(2) In claim 5, the engagement hole is a female screw hole, and a fastener for attaching a spacer interposed between the members together with the gasket can be screwed into the female screw hole. Sealing structure between members. With this structure, both the attachment of the spacer and the prevention of the displacement of the gasket can be achieved even if the number of holes formed in the joint surface is small.

(3) Claims 1 to 6, technical ideas 1 and 2
In, the width of the flat portion located between the adjacent chamfered portions on the joint end surface is 0.5 mm to 1.5 mm.
(Preferably 0.7 mm to 1 mm) A sealing structure between members. Within such a range, the tightening force of the gasket can be strengthened by reliably reducing the surface pressure, and high sealing performance can be secured.

(4) Claims 1 to 6, technical ideas 1 to 3
In above, one of the members is a solenoid valve having a plurality of flow passage forming holes, and the other is a valve block having a flow passage forming hole at a position corresponding to each flow passage forming hole of the solenoid valve. Sealing structure between members.

The technical terms used in this specification are defined as follows. "Fluids: nitrogen, oxygen, argon, carbon dioxide, hydrogen,
In addition to gas such as air which is a mixture of them,
For example, liquids such as water, alcohol, oil, and so-called critical fluids are also included. "

[0066]

As described above in detail, according to the inventions described in claims 1 to 6, there is provided a seal structure between members which is excellent in pressure resistance, assembling property and cost and is easy to manufacture. You can

According to the second aspect of the present invention, the number of man-hours is surely reduced at the time of manufacturing the member, so that the manufacturing can be further facilitated and the cost can be further reduced. Claim 3
According to the invention described in 1), further facilitation of manufacturing,
It is possible to improve pressure resistance and assemblability.

According to the invention described in claims 4, 5, and 6,
Since the positional displacement of the gasket during and after the assembling is more reliably prevented, the pressure resistance and the assembling property can be further improved.

[Brief description of drawings]

FIG. 1 is a front view of a solenoid valve manifold according to an embodiment.

FIG. 2 is a perspective view of the solenoid valve manifold when viewed from the rear.

FIG. 3 is an exploded perspective view of the solenoid valve manifold when viewed from the rear.

FIG. 4 is a side view of the other side surface of the valve block.

FIG. 5 is a plan view of the same.

FIG. 6 is a partial cross-sectional view showing an opening edge of each hole of the valve block.

7A is a front view of the valve block, and FIG. 7B is a rear view of the same.

FIG. 8 is a perspective view of the valve block when viewed from the front.

FIG. 9 is a front view of the gasket.

10 is a cross-sectional view taken along the line CC of FIG.

FIG. 11 is a cross-sectional view of a valve block equipped with the gasket of the embodiment.

FIG. 12 is a cross-sectional view of a valve block equipped with a slightly modified gasket of the embodiment.

FIG. 13 is a cross-sectional view of a mounted valve block equipped with a conventional gasket.

FIG. 14 is a cross-sectional view of a mounted valve block equipped with a conventional gasket.

[Explanation of symbols]

19 ... Valve block as member, 19d ... Engagement hole, 19
e ... Joining surface, 20 ... Solenoid valve as member, 20a ... Joining surface 21,21A ... Gasket, 49 ... Chamfered portion, 29,
30, 31, 32, 33, 50, 51 ... Flow path forming holes, 8
0 ... Base part of gasket, 81 ... Communication hole, 82 ... Convex engaging part as engaging part, 82b ... Engaging protrusion as position deviation preventing part.

Claims (6)

[Claims] 1. A seal structure in which a gasket is interposed between the joint surfaces of a plurality of members, and a flow passage is formed by a passage forming hole opened in both joint surfaces and a communication hole of the gasket, A seal structure between members, wherein a chamfered portion is formed at an opening edge of the forming hole, and an engaging portion engageable with the chamfered portion is provided at a peripheral edge of the communication hole. 2. The member according to claim 1, wherein the member is a mold-molded product manufactured by mold-molding, and the chamfered portion is formed at the same time when the member is mold-molded. Seal structure between. 3. The seal structure between members according to claim 1, wherein the engagement portion is a convex engagement portion that is provided so as to project over the entire periphery of the communication hole. 4. The seal structure between members according to any one of claims 1 to 3, wherein the gasket is provided with a position shift prevention portion in addition to the engagement portion. 5. The position deviation prevention portion is an engagement projection that is provided so as to project from a base portion of the gasket in a thickness direction, and an engagement hole with which the engagement projection is engaged is provided on the joint surface of the member. The seal structure between members according to claim 4, wherein the seal structure is provided. 6. The position shift prevention portion is an engaging projection protruding from the base of the gasket in an outer peripheral direction, and the engaging projection is engaged with a part of an adjacent gasket. The seal structure between members according to claim 4, which is characterized.