JPH102433A - Manifold - Google Patents

Abstract

(57) [Problem] To provide a manifold capable of changing the flow paths of NO type and NC type with the same three-port valve without increasing the size of the manifold. SOLUTION: The manifold 1 is constituted by a combination of a pilot type solenoid valve 30 for controlling pilot air, an air pressure switching valve body 32 containing a poppet valve driven by pilot air, and a connection plate 31. NO type 3 port solenoid valve 4 and NC type 3 port solenoid valve 5
Are attached to the manifold base 1 from the same direction, the distance to the outside of the NO type 3 port solenoid valve 4 and the outside of the NC type 3 port solenoid valve 5 is constant. This is performed by rotating the pneumatic switching valve body 32 by 180 degrees.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic switching valve in a pneumatic device, and more particularly to a manifold in which a pilot type three-port valve of NO type and NC type is mounted.

[0002]

2. Description of the Related Art Conventionally, pneumatic equipment has been inexpensive,
It is used in various industries because it enables labor saving and automation. In addition, air pressure has recently been used in semiconductor production lines to keep the environment clean. Especially in pneumatic equipment for automatic control,
Since a plurality of pneumatic switching valves, which are important components, are used for one working device, space saving, piping saving,
Manifolds are used for ease of management.

[0003] Therefore, the first type of manifold that can mount NO-type and NC-type three-port valves in a space-saving and piping-saving manner is available.
FIGS. 20, 21 and 22 show conventional examples. Here, the NO type indicates a flow path shape in which a normal air supply port and an output port communicate with each other, and the NC type indicates a flow path shape in which a normal output port and an exhaust port communicate with each other. For example, in the case of a solenoid valve,
A type in which the supply port and the output port communicate with each other when the power is not supplied is a NO type, and a type in which the output port and the exhaust port communicate with each other is the NC type. 20 is a plan view of the manifold, FIG. 21 is a cross-sectional view of the NO type 3-port valve portion of the manifold, and FIG. 22 is a cross-sectional view of the NC type 3-port valve portion of the manifold. In FIG. 20, the manifold 100 includes a manifold base 101, a NO type 3-port valve 102, and an NC type 3-port valve 103.

As shown in FIG. 21 or 22, the manifold base 101 has a supply port 109a, an exhaust port 108a, and an output port 1 connected to a three-port valve.
07a is formed. In addition, manifold base 1
01, an air supply channel 104 and an exhaust channel 105 are formed in a direction orthogonal to the air supply port 109b and the exhaust port 108b of the three-port valve.
09b and the exhaust port 108b communicate with the air supply passage 104 and the exhaust passage 105, respectively. In this way, supply and exhaust are intensively processed. The pilot exhaust is discharged from a pilot exhaust port 106 provided in the three-port valve. Further, when a clean environment such as the semiconductor industry is required, the size of the manifold becomes large, but the pilot exhaust is also concentrated exhaust.

On the other hand, the air supply port 1 is provided on the connection side of the three-port valves 102 and 103 with the manifold base 101.
09b, the exhaust port 108b, and the output port 107b
Are formed. The NO-type three-port valve 102 and the NC-type three-port valve 103 have differently shaped spools 110 and 111, respectively, and are divided into NC-type flow paths and NC-type flow paths according to the shapes of the spools.

Here, a method of attaching the three-port valves 102 and 103 to the manifold base 101 will be described. The supply port 109a, exhaust port 108a, and output port 107a formed on the connection surface of the manifold base 101 are connected to the supply port 109b, exhaust port 108 formed on the connection surface of the three-port valves 102 and 103.
b and the output port 107b are joined, and the three-port valves 102 and 103 are mounted on the manifold base 101. Further, a seal gasket 112 is attached to a connection portion of each port so that air does not leak from the connection surface.

The manifold 10 configured as described above
0 output port 107a, various unillustrated pneumatic actuators and the like are attached.
By supplying air at a predetermined pressure to the air supply passage 104 and operating each air pressure switching valve, various air pressure operated devices and the like are operated.

However, the above-described manifold 100 has the following problems. By changing the shape of the spool in the 3-port valve, NO type 3-port valves and NC type 3-port valves are manufactured. Therefore, in the manufacturing process, the number of components is increased, which leads to an increase in cost. In addition, the user must own two types of three-port valves in order to change the flow path between the NO type and the NC type.
Extra cost was required for storing the unused three-port valve, and the economic burden was increased.

FIG. 23 shows a second conventional example of a three-port valve manifold devised to solve the problems of the first conventional example. By changing the direction of the valve with a spool having the same shape, that is, the same three-port valve, the flow path can be changed from the NO type to the NC type.
That is, in FIG. 23, the three-port valves 120a and 12a
0b is the same product, 120a is used as an NC type 3 port valve, and 120b is used as a NO type 3 port valve. The air supply port and the exhaust port when used as the NO type function as the exhaust port and the air supply port when used as the NC type, respectively. Therefore, the problem of the first conventional example is solved by this manifold.

[0010]

However, the second prior art three-port valve manifold has the following problems. That is, in order to change the flow path between the NO type and the NC type using the same three-port valve, the direction of the entire valve is changed by 180 degrees. For this reason, there is a problem that the position of the pilot air control valve is reversed and the size of the manifold is increased. Further, when performing manifold centralized pilot air supply, two pilot air supply ports are required in a three-port valve. The problem of the second conventional example can be solved by the first conventional example. That is, the problems of the conventional examples are in conflict with each other.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned contradictory problems at the same time, and the same three-port valve can be used for both the NO type and the NC type without increasing the size of the manifold. The purpose is to provide a manifold.

[0012]

To achieve this object, a three-port valve manifold of the present invention comprises a pilot air control valve for controlling pilot air, and a poppet valve or spool driven by the pilot air. A NO type 3-port valve with a normal air supply port and an output port communicating with each other and an NC type 3-port valve with a normal output port and an exhaust port communicating with each other are mounted on a manifold base. When the NO type 3 port valve and the NC type 3 port valve are mounted on the manifold base in the same direction, the NO type 3 port valve and the NC type 3 port valve from the manifold base are mounted. The distance to the outside of the valve is constant, and the NO type 3 port valve and the NC type 3 port valve are composed of the same structural parts. Characterized in that it is.

The three-port valve manifold according to the present invention is characterized in that the poppet valve or the spool valve is rotated in the vertical direction by 180 degrees in the above-mentioned manifold, so that N
It is characterized in that the flow path can be changed between the O type and the NC type.

[0014] In the three-port valve manifold of the present invention, in the above-mentioned manifold, the supply / exhaust ports formed on the respective connection surfaces of the three-port valve and the manifold base are arranged point-symmetrically with respect to the output port. It is characterized by having been done.

A three-port valve manifold according to the present invention, in the aforementioned manifold, is disposed between the pilot air control valve and the poppet valve or the spool valve, and forms two or more layers of pilot air flow paths. Characterized in that it has a plate that is provided. For example, the plate constitutes a plurality of flow paths for pilot air, and the plurality of flow paths are formed in layers so that the flow paths do not intersect in the plate.

The three-port valve manifold having the above structure operates as follows. That is, in the three-port valve, by rotating the poppet valve or the spool valve, which is the main valve, by 180 degrees, the flow paths of the NO type and the NC type can be changed using the same shape poppet or spool. Therefore, by configuring the NO-type and NC-type three-port valves with the same structural parts, it is possible to reduce costs by using common parts in terms of manufacturing. In addition, maintenance management becomes easy for the user. Furthermore, by arranging the supply / exhaust ports formed on the respective connection surfaces of the 3-port valve and the manifold base symmetrically with respect to the output port, the main valve, which is a component of the 3-port valve, is vertically moved. By rotating by 180 degrees in the direction, the flow paths of the NO type and the NC type can be changed, so that the manifold dimension does not increase. In addition, for users, NO type and N
It is not necessary to have two types of three-port valves for changing the flow path from the C type, and the economic burden is reduced. Further, the connection plate enables centralized processing of pilot air with only one pilot supply / exhaust port.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a manifold according to the present invention will be described in detail with reference to the drawings, taking concrete embodiments. FIG. 1 is a perspective view showing a manifold in which a NO type 3-port solenoid valve and an NC type 3-port solenoid valve according to an embodiment of the present invention are mixedly mounted. In FIG. 1, a manifold 1 includes a manifold base 2, a NO type 3 port solenoid valve 4 and an NC type 3 port solenoid valve 5.
Each solenoid valve and the manifold base 2 are attached by a fixing bracket 25 and a fixing screw 26. The manifold base 2 has a rectangular parallelepiped shape, and a common air supply channel 6 and a common exhaust channel 7, and an external pilot channel 13 and a pilot exhaust channel 14 penetrate through the inside of the manifold base 2 in the longitudinal direction. . In addition, the output port 8 does not cross the common air supply passage 6 and the common exhaust passage 7 and the external pilot passage 13 and the pilot exhaust passage 14 in the direction perpendicular to the longitudinal direction without crossing the respective passages. It is formed through the inside of the manifold base 2. Furthermore, 3 in the longitudinal direction
For connection with the port solenoid valve, connection recesses 9a, 10
a is formed.

FIGS. 2 and 3 show the NC type 3 of the manifold 1.
It is the figure which extracted the part of the port solenoid valve 5. FIG. 2 shows N
FIG. 3 is a top view of the C-type 3-port solenoid valve 5, and FIG. As shown in FIG. 2, the NC three-port solenoid valve 5 includes a pilot solenoid valve 30, an air pressure switching valve body 32, and a plate-like connection plate 31 for connecting them.
A seal gasket is attached to each connection surface to prevent air from leaking. Also, as shown in FIG.
At the connection portion with the manifold base 2, a connection protrusion 9 b,
10b are formed.

FIGS. 4 and 5 show the manifold base 2 and the NC.
3 shows a connection surface of the 3-port solenoid valve 5. 4 is a front view of the connection surface on the manifold base 2 side, and FIG. 5 is a front view of the connection surface on the NC type 3 port solenoid valve 5 side. As shown in FIG. 4, an air supply port 2 is provided on the connection surface of the manifold base 2 side.
0a, an exhaust port 21a, an output port 22a, a pilot air supply port 23a, a pilot exhaust port 24a,
Further, connection pins 25a are formed. On the other hand, N
As shown in FIG. 5, the connection surface on the side of the C-type 3-port solenoid valve 5 also has an air supply port 20b, an exhaust port 21b, an output port 22b, a pilot air supply port 23b, a pilot exhaust port 24b, and a connection port. A pin receiving port 25b is formed. Further, a seal gasket 26 is provided to seal each port.

Here, a method of attaching the NC type three-port solenoid valve 5 to the manifold base 2 will be described. When mounting the manifold base 2 and the NC type 3 port solenoid valve 5, first, the connection projection 10 b of the NC type 3 port solenoid valve 5 is engaged with the connection recess 10 a of the manifold base 2.
Next, the pin socket 25b of the NC type 3 port solenoid valve 5 and the connecting pin 25a of the manifold base 2 are fitted.
Then, the connection projection 9b of the NC type 3 port solenoid valve 5 and the connection recess 9a of the manifold base 2 are connected to the connection fitting 25.
Then, the connection is completed. At this time, each port formed on the connection surface between the manifold base 2 and the NC type three-port solenoid valve 5 is kept airtight by a seal gasket 26.

The NO type 3-port solenoid valve 4 is also mounted on the manifold base 2 in the same manner as the above mounting method. Thus, a large number of three-port valves are attached to the manifold base 2 to form the manifold 1.

The structure of the NC three-port solenoid valve 5, which is a part of the manifold 1, will be described. As previously mentioned,
The NC type 3 port solenoid valve 5 includes a pilot type solenoid valve 30,
It is composed of a pneumatic switching valve body 32 and a connection plate 31. Therefore, each structure will be described.

First, the structure of the air pressure switching valve body 32 will be described with reference to FIGS. 6, 7, and 8. FIG. FIG. 6 is a perspective view of the pneumatic switching valve body 32, and FIGS. 7 and 8 are sectional views of the same. 7 shows a state in which the solenoid valve is not energized, and FIG. 8 shows a state in which the solenoid valve is energized.

As shown in FIG. 6, the pneumatic switching valve body 32 is formed with a pilot supply port 35, a pilot exhaust port 36, and pilot output ports 38 and 39 communicating with the respective air chambers. I have. Further, as shown in FIG. 7, the pneumatic switching valve body 32 incorporates a poppet valve 42, and the poppet valve 42 is
3 is pressed upward. The pilot exhaust port 39 communicates with the air chamber 41, and the pilot output port 38 communicates with the air chamber 40.

Next, the structure of the connection plate 31 will be described with reference to FIGS. 9 is a front view of the connection plate 31 as viewed from the pilot solenoid valve 30 side, FIG. 10 is a front view of the connection plate 31 viewed from the pneumatic switching valve body 32 side, and FIG. 11 is a sectional view thereof. The sectional views of the respective sections shown in FIG. 10 are as follows. FIG. 12 is a sectional view taken along the line AA, and FIG.
Is a cross-sectional view taken along the line BB, and FIG. 14 is a cross-sectional view taken along the line CC.

The pilot type solenoid valve 3 of the connection plate 31
On the 0 side, as shown in FIG. 9, two screw holes 60 for connection to the air pressure switching valve body 32, a pilot air supply port 61, a pilot exhaust port 62, and a pilot output port 63 are formed. 31. A notch 65 is formed around the screw hole 60 so that the connection screw does not protrude from the connection surface.
Are formed. Further, a female screw 64 for connection with the pilot type solenoid valve 30 is cut at two places.

On the other hand, as shown in FIG. 10, a pilot air supply groove 66, pilot exhaust grooves 67, 68, 69, 70 and pilot output grooves 71, 72, 73 are formed on the connection plate 31 on the side of the air pressure switching valve body 32. Are formed. Grooves 66, 71, 68 provided on the upper part of the connection plate 31
Will be described. As shown in the figure, the pilot air supply groove 66 penetrates the connection plate 31 and communicates with the pilot air supply port 61. The pilot exhaust groove 68 and the pilot output groove 71 have the same depth, and the pilot exhaust groove 68 communicates with the communication passage 74, and the pilot output groove 71 communicates with the communication passage 77. Further, the communication passage 77 communicates with the pilot output port 63.

Next, the grooves 69, 72 and 67 provided in the middle of the connection plate 31 will be described. As shown in FIG. 10, these grooves have a vertically long shape, and grooves 69 and 67 are arranged on the left and right with the groove 72 at the center. As shown in FIGS. 11 and 13, the pilot output groove 72 has a shallow depth so as to avoid the communication passage 75 and communicates with the communication passages 77 and 78. The pilot exhaust groove 67 communicates with the pilot exhaust port 62 in the middle of the groove, the communication passage 74 above the groove, and the communication passage 75 below the groove. Further, the pilot exhaust groove 69
The communication passage 75 above the groove and the communication passage 7 below the groove.
And 6. The pilot exhaust grooves 69 and 67 communicate with each other through a communication passage 75.

Finally, the grooves 70 and 73 provided below the connection plate 31 will be described. As shown in FIG. 14, the pilot exhaust groove 70 has a structure with a depth of two. The depth of the deepest portion of the pilot exhaust groove 70 and the depth of the pilot output groove 73 are the same. Also,
As shown in FIG. 11, the pilot exhaust groove 70 communicates with the communication passage 76, and the pilot output groove 73 communicates with the communication passage 78.

As described above, in the connection plate 31
Form three flow paths. That is, the pilot air supply is performed by the pilot supply port 61 and the pilot supply groove 66, the exhaust is performed by the pilot discharge port 62 and the pilot discharge grooves 68 and 70, and the output is performed by the pilot output port 63 and the pilot output grooves 71 and 73. Communicating.

Finally, the structure of the pilot type solenoid valve 30 will be described with reference to FIGS. FIG.
5, FIG. 16 is a sectional view of the pilot solenoid valve 30,
FIG. 15 shows a state where power is not supplied, and FIG. 16 shows a state where power is supplied. FIG. 17 is an exploded perspective view of the movable portion.

As shown in FIG. 15, the pilot solenoid valve 30 includes a valve body 80, a coil 81, and an electrical unit 82. First, the configuration of the movable portion including the valve body portion 80 and the coil portion 81 will be described with reference to FIG. The movable portion includes a switch for manual operation at an upper portion and a switching valve portion at a lower portion with the valve block 83 as a center. The manual switch is configured by inserting a manual button 86 into the valve block 80 via a manual pin 84 and a spring 85 and mounting a lid 87. The switching valve portion is configured such that the valve 53, the valve guide 90, and the valve seat 89 are integrated into a valve block 83 from below through a spring 88. Then, the coil portion 81 configured by inserting the plunger 54 into the electromagnet 91 via the spring 57 is connected to the valve body portion 80 configured as described above, thereby forming a movable portion. Further, as shown in FIG. 15, a flow path for pilot air, that is, a pilot air supply port 50, a pilot exhaust port 51, and a pilot output port 52 are formed in the valve body block 83.

The movable section constructed as described above operates as follows. First, when the coil 55 is not energized, the plunger 54 is pressed upward by the spring 57 as shown in FIG. At this time, since the force from the plunger 54 is stronger than the force of the spring 88, the valve guide 90 and the valve 53 are pressed upward by the plunger 54. Therefore, the pilot output port 52 and the pilot exhaust port 51 communicate as a pilot air flow path.

Here, when the coil 55 is energized, FIG.
The plunger 54 overcomes the force of the spring 57 and moves downward as shown in FIG. Then, the valve 53 and the valve guide 90 are moved downward by the spring 88. Accordingly, the flow path of the pilot air is switched, and the pilot air supply port 50 and the pilot output port 52 communicate with each other. In the operation by the manual button, when the manual button 86 is pressed, the valve 53 moves via the manual pin 84, and the flow path of the pilot air is switched.

The N constituted by the components described above
The flow path of the working air in the C-type three-port solenoid valve 5 will be described. First, the case where the coil 55 is not energized will be described. As for the main flow path, as shown in FIG. 7, the output port 22b and the exhaust port 21b of the air pressure switching valve main body 32 communicate with each other. The air supplied to the pilot air supply port 13 of the manifold base 2 is
The air flows through the pilot air supply port 35 of the air pressure switching valve main body 32, the pilot air supply groove 66 of the connection plate 31, and the pilot air supply port 61 to the pilot air supply port 50 of the pilot solenoid valve 30. At this time, FIG.
As shown in FIG.
Is closed, so pilot air stays here.

Next, a case where the coil 55 is energized will be described. When the coil 55 is energized as described above, FIG.
As shown in FIG. 6, when the plunger 54 moves downward by the suction force of the coil 55, the valve 53 also moves downward. When the valve 53 moves downward, the pilot air supply port 5
0 and the pilot output port 52 communicate with each other. Then, the pilot air flows from the pilot output port 52 to the pilot output port 63 of the connection plate 31. Then, in the connection plate 31, as shown in FIG. 11, the air flows from the pilot output port 63 to the pilot output groove 71 via the communication passage 77, and from there to the pilot output port 38 of the air pressure switching valve body 32. Since the pilot output port 38 communicates with the air chamber 40, pilot air is supplied to the air chamber 40.
As a result, the air pressure overcomes the force of the spring 43 and moves the poppet valve 42. Therefore, as shown in FIG. 8, the air supply port 20b and the output port 22b communicate with each other, and the main flow path is switched. On the other hand, the air in the air chamber 41 passes from the pilot output port 39 through the pilot exhaust groove 70 of the connection plate 31, passes through the pilot exhaust port 36 of the air pressure switching valve body 32, and exits from the pilot exhaust passage 14 of the manifold base 2. Is discharged.

When the energization of the coil 55 is stopped,
The pilot air supply is stopped at the pilot air supply port 50 by the valve 53 in the pilot solenoid valve 30. Therefore, the supply of the pilot air to the air chamber 40 in the air pressure switching valve main body 32 is stopped, the poppet valve 42 is returned to the original position by the force of the spring 43, the main flow path is switched again, and the output port 22b And exhaust port 2
1b communicates.

On the other hand, the pilot air remaining in the air chamber 40 is exhausted to the outside through the following path. First,
The pilot air flows through the pilot output port 38 into the pilot output groove 71 of the connection plate 31. Then, the fluid flows from the pilot output port 63 into the pilot-type solenoid valve 30 through a flow path formed in the connection plate 31. In the pilot type solenoid valve 30,
Pilot output port 52 to pilot exhaust port 5
1 and returns to the connection plate 31 again. Thereafter, the air flows into the pilot exhaust port 36 of the air pressure switching valve main body 32 through a flow path formed in the connection plate 31, and is discharged outside through the pilot exhaust flow path 14 of the manifold base 2.

Next, a method for changing from the NC type to the NO type flow path will be described. First, from manifold base 2 to N
Remove the C type 3 port solenoid valve 5. Next, the NO type 3 port solenoid valve 4 is connected to the pilot solenoid valve 30 and the connection plate 3.
1 and disassembled into a pneumatic switching valve body 32. Then, only the air pressure switching valve body 32 is
Rotate it 0 degrees and combine again. Then, it is attached to the manifold base 2. This completes the flow change from the NC type to the NO type. Therefore, the NO type 3-port solenoid valve 4 whose flow path has been changed in this way will be described.
The difference between the NC type 3 port solenoid valve 5 and the NO type 3 port solenoid valve 4 is that the arrangement of the air pressure switching valve main body 32 is inverted up and down by 180 degrees. Further, as shown in FIGS. 4 and 5, the supply / exhaust ports formed on the respective connection surfaces of the air pressure switching valve 32 and the manifold base 2 are arranged point-symmetrically with respect to the respective output ports. The air pressure switching valve 32 and the supply / exhaust ports of the manifold base 2 communicate with each other as follows. Manifold base 2
Air supply port 20a and pilot air supply port 23a
The exhaust port 21b and the pilot exhaust port 24b of the air pressure switching valve 32 communicate with the exhaust port 21a and the pilot exhaust port 24a of the manifold base 2 and the air supply port 20b and the pilot air supply port 23b of the air pressure switching valve 32. In other words, the air supply port of the NC type is used as an exhaust port in the NO type, and the exhaust port of the NC type is used as an air supply port in the NO type.

Here, the operation of the NO type 3-port solenoid valve 4 and the flow of pilot air will be described. The air supplied to the pilot air supply port 13 of the manifold base 2 is supplied to the pilot exhaust port 3 of the air pressure switching valve body 32.
6, and the pilot supply groove 66 of the connection plate 31,
It flows through the pilot air supply port 61 to the pilot air supply port 50 of the pilot solenoid valve 30. At this time,
As shown in FIG. 15, since the pilot air supply port 50 is closed by the valve 53, the pilot air remains there.

Next, when the coil 55 is energized, the valve 53 in the pilot solenoid valve 30 moves downward, so that the pilot air supply port 50 and the pilot output port 52 communicate. Then, the pilot air goes to the pilot output port 5
2 to the pilot output port 63 of the connection plate 31. Then, in the connection plate 31, as shown in FIG.
7, and flows through the pilot output groove 72 to the pilot output groove 73, and from there to the pilot output port 38 of the air pressure switching valve body 32. As a result, the poppet valve 42 moves, and the main flow path is switched as shown in FIG. On the other hand, the air in the air chamber 41 flows from the pilot output port 39 to the pilot exhaust groove 68 of the connection plate 31. Then, the air flows into the pilot exhaust groove 70 by the flow path formed in the connection plate 31, and flows into the pilot air supply port 35 of the air pressure switching valve body 32.
Through the pilot exhaust passage 1 of the manifold base 2
It is discharged from 4.

When the power supply to the coil 55 is stopped,
The pilot air supply is stopped at the pilot air supply port 50 by the valve 53 in the pilot solenoid valve 30. Therefore, the supply of the pilot air to the air chamber 40 in the air pressure switching valve main body 32 is stopped, and the poppet valve 42 is returned to the original position by the force of the spring 43, and the main flow path is switched again.

On the other hand, the pilot air remaining in the air chamber 40 is exhausted to the outside through the following path. First,
The pilot air flows through the pilot output port 38 into the pilot output groove 73 of the connection plate 31. Then, the fluid flows from the pilot output port 63 into the pilot-type solenoid valve 30 through a flow path formed in the connection plate 31. In the pilot type solenoid valve 30,
Pilot output port 52 to pilot exhaust port 5
1 and returns to the connection plate 31 again. Thereafter, the air flows into the pilot air supply port 35 of the air pressure switching valve main body 32 through a flow path formed in the connection plate 31, and is discharged outside through the pilot exhaust flow path 14 of the manifold base 2.

That is, the respective supply / exhaust ports formed on the respective connection surfaces of the air pressure switching valve 32 and the manifold base 2 are arranged point-symmetrically with respect to the respective output ports, and the connection plate 31 makes it easy. NO
The flow path can be changed between NC and NC

As described above, according to the manifold of the present embodiment, since the same constituent parts constitute the NO type and NC type three-port valves, the parts can be shared in the manufacturing process and the cost can be reduced. to enable. Further, by arranging the supply / exhaust ports formed on the respective connection surfaces of the pneumatic switching valve and the manifold base symmetrically with respect to the respective output ports, the pneumatic switching valve is 18
By rotating it 0 degrees, NO and N
The user can change the flow path to the C type,
It is not necessary to own a three-port valve of the type, and the economic burden is reduced. Further, since the pneumatic switching valve body and the pilot type solenoid valve are separate bodies, maintenance management becomes easy. In addition, since the connection plate is independent of the flow path switched by the poppet valve or the spool valve, the air supply flow path and the exhaust flow path for the pilot air control valve can be concentrated on the pilot air. .

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various applications are possible. That is, for example, in the present embodiment, the air pressure switching valve is a poppet valve, but the present invention is naturally applicable to a spool valve. In addition, although solenoid valves are used to control pilot air,
It is also applicable to control valves using air.

[0047]

According to the manifold of the present invention, when the NO type 3 port valve and the NC type 3 port valve are mounted on the manifold base from the same direction, the NO type 3 port valve and the NC type 3 from the manifold base are provided. Since the distance to the outside of the port valve is constant, and the NO type 3 port valve and the NC type 3 port valve are formed of the same structural parts, the size of the manifold is not increased, and the pilot air control valve is provided. Without changing the arrangement direction of the manifolds, a manifold can be configured that can easily change the flow path from the NC type to the NO type or from the NO type to the NC type.

[Brief description of the drawings]

FIG. 1 is a perspective view of a manifold according to the present invention.

FIG. 2 is a plan view of an NC type three-port solenoid valve which is a part of the manifold according to the present invention.

FIG. 3 is a side view of an NC type three-port solenoid valve which is a part of the manifold according to the present invention.

FIG. 4 is a front view of a connection surface on a manifold base side of an NC type 3-port solenoid valve portion of the manifold according to the present invention.

FIG. 5 is a front view of a connection surface on the NC type 3 port solenoid valve side of the NC type 3 port solenoid valve portion of the manifold according to the present invention.

FIG. 6 is a perspective view of a pneumatic switching valve body which is a component of the NC type three-port solenoid valve according to the present invention.

FIG. 7 is a sectional view of a pneumatic switching valve body which is a component of the NC type three-port solenoid valve according to the present invention, showing a state where power is not supplied to an electromagnetic coil.

FIG. 8 is a cross-sectional view of a pneumatic switching valve body which is a component of the NC type three-port solenoid valve according to the present invention, and shows a state in which an electromagnetic coil is energized.

FIG. 9 is a front view of a connection plate, which is a component of the three-port solenoid valve according to the present invention, as viewed from a pilot solenoid valve side.

FIG. 10 is a front view of a connection plate, which is a component of the three-port solenoid valve according to the present invention, as viewed from the pneumatic switching valve body side.

FIG. 11 is a cross-sectional view of FIG.

FIG. 12 is a sectional view taken along the line AA shown in FIG. 10;

13 is a cross-sectional view taken along a line BB shown in FIG.

FIG. 14 is a cross-sectional view taken along the line CC shown in FIG. 10;

FIG. 15 is a cross-sectional view of a pilot-type solenoid valve that is a component of the three-port solenoid valve according to the present invention, showing a state where power is not supplied to an electromagnetic coil.

FIG. 16 is a cross-sectional view of a pilot-type solenoid valve which is a component of the three-port solenoid valve according to the present invention, showing a state in which an electromagnetic coil is energized.

FIG. 17 is an exploded perspective view of a movable portion of a pilot-type solenoid valve which is a component of the three-port solenoid valve according to the present invention.

FIG. 18 is a cross-sectional view of a pneumatic switching valve body which is a component of the NO type three-port solenoid valve according to the present invention, showing a state where power is not supplied to an electromagnetic coil.

FIG. 19 is a cross-sectional view of a pneumatic switching valve body which is a component of the NO-type three-port solenoid valve according to the present invention, showing a state in which an electromagnetic coil is energized.

FIG. 20 is a plan view of a manifold according to a first conventional example.

FIG. 21: NO type 3 of the manifold according to the first conventional example
It is sectional drawing of a port valve part.

FIG. 22 shows an NC type 3 of the manifold according to the first conventional example.
It is sectional drawing of a port valve part.

FIG. 23 is a plan view of a manifold according to a second conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manifold 2 Manifold base 4 NO type 3 port solenoid valve 5 NC type 3 port solenoid valve 6 Common air supply passage 7 Common exhaust passage 8 Output port 13 External pilot passage 14 Pilot exhaust passage 30 Pilot type solenoid valve 31 Connection plate 32 Pneumatic switching valve body

Claims (4)

[Claims] 1. A pilot switching valve comprising a combination of a pilot air control valve for controlling pilot air and a poppet valve or a spool valve driven by the pilot air. A manifold in which an NO type 3-port valve having an output port communicating therewith and an NC type 3-port valve having a normal output port communicating with an exhaust port are mounted on a manifold base in a mixed manner. When the NC type 3 port valve is attached to the manifold base from the same direction, the NO type 3 port valve and the N
A manifold wherein the distance to the outside of the C-type three-port valve is constant, and the NO-type three-port valve and the NC-type three-port valve are formed of the same structural parts. 2. The manifold according to claim 1, wherein the NO-type flow path and the NC-type flow path can be changed by rotating the poppet valve or the spool valve by 180 degrees. 3. The manifold according to claim 1, wherein each of the supply / exhaust ports formed on the respective connection surfaces of the three-port valve and the manifold base is point-symmetric with respect to the output port. A manifold characterized by being arranged. 4. The manifold according to claim 2, wherein two or more pilot air flow paths are formed between the pilot air control valve and the poppet valve or the spool valve. A manifold having a plate.