JPH10110858A - Pressure detecting method in electrical control directional control valve, electrical control directional control valve and electrical control valve manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect fluid pressure in a port without taking out a fluid in either port from a port opening face to which each port is opened in a valve body. SOLUTION: A lower face 25a to which ports 30-34 of an electromagnetic directional control valve 5, of a valve body 21 is opposed to an upper face 2b to which passages 17, 18 from a plurality of output ports 13, 14 provided at a manifold base 2, and passages 10-12 communicated with a common supply passage 7 and common exhaust passages 8, 9 are opened. The valve body 21 is provided with a first lead-out passage 35 communicated with a first output port 33 and opened to the upper face 25b, and the valve body 21 is integrally provided with a pressure detecting part 24 communicated with the first lead-out passage 35 so as to lead air into a pressure sensor 56 from the first output port 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting pressure in an electrically operated directional control valve, an electrically operated directional control valve, and an electrically operated valve manifold.

[0002]

2. Description of the Related Art As shown in FIG. 7, in an electromagnetic valve manifold in which a plurality of electromagnetic direction control valves 91 are mounted on a manifold base 90, an output port pair 92 is provided for each electromagnetic direction control valve 91. Each output port pair 92 is a pipe 93
Are connected to an actuator such as an air cylinder 94, and the air cylinder 94 reciprocates by switching the electromagnetic direction control valve 91 alternately. Each electromagnetic direction control valve 91 is connected to a control device 95 such as a programmable controller, and is sequentially controlled by a control signal output from the control device 95 according to a preset control program.

When the control device 95 outputs a control signal to a certain electromagnetic directional control valve 91, the control device 95 recognizes whether or not the electromagnetic directional control valve 91 has operated based on the control signal.
Next, a control signal is output to the electromagnetic direction control valve 91 to be operated. A pressure switch 96 for detecting the air pressure supplied from the output port pair 92 is provided for each electromagnetic direction control valve 91 so that the control device 95 checks the operation of the electromagnetic direction control valve 91. . Each of the pressure switches 96 is connected to a control device 95 via a signal line 97.

The pressure switch 96 is connected to a pipe 93 connecting each output port pair 92 to an air cylinder 94.
8 are connected. However, the pressure switch 9
Reference numeral 6 denotes a branch pipe 9 connected to a pipe 93 connected to the output port pair 92.
Since the work of connecting and assembling 8 is required, the assembling work is troublesome. Further, since the pressure switch 96 is provided in a state separated from the electromagnetic direction control valve 91, the size of the entire electromagnetic valve manifold including the pressure switch 96 becomes large, and the pressure switch 96 is connected to the control device 95 by the control device 95.
And the maintenance and management of the signal lines 97 are very difficult.

In order to solve such a problem, Japanese Utility Model Application Laid-Open No.
Japanese Patent Publication No. -30378 proposes a method of interposing a pressure sensor between a manifold base of an electromagnetic valve manifold and each electromagnetic directional control valve. According to this method,
As described above, it is not necessary to provide a pressure sensor in the pipe 93 connected to the output port 92.

[0006]

However, in the solenoid valve manifold disclosed in the above publication, in order to provide a pressure sensor, the electromagnetic direction control valve must be once removed from the manifold base, and then the pressure sensor must be attached to the manifold base. The installation work was troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to take out fluid of any one of ports from a port opening surface in which each port is opened in a valve body. It is an object of the present invention to provide a pressure detection method in an electrically operated directional control valve and an electrically operated directional control valve which can detect the pressure of a fluid in the port without the pressure.

A second object is to control the pressure of the fluid at each port of the electrically operated directional control valve without providing a pressure sensor in a pipe connected to an output port provided on the manifold base. Is to provide an electrically operated valve manifold that can detect the valve without removing it from the manifold base.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 includes a plurality of ports communicating with a spool chamber of a valve body, and each port is connected to one of the valve bodies. In a pressure detection method for an electrically operated directional control valve that opens a side surface to form a port opening surface and switches a flow path by operating a spool housed in the spool chamber with an electric actuator, An outlet passage communicating with any one of the ports is formed in the valve body so as to open on a surface other than the port opening surface, and a fluid is introduced from the port to the pressure sensor through the outlet passage. The pressure at the port was detected.

According to a second aspect of the present invention, there are provided a plurality of ports communicating with the spool chamber of the valve body, and each of the ports is opened on one side of the valve body to form a port opening surface.
In an electric operation direction control valve for switching a flow path by operating a spool housed in the spool chamber with an electric actuator, an outlet flow path communicating with any one of the ports is provided with the port opening. The valve body is formed integrally with the valve body so as to open to a surface other than the surface, and a pressure detection unit that communicates with the outlet channel and introduces fluid from the port to the pressure sensor is provided integrally with the valve body.

According to a third aspect of the present invention, in the second aspect, the surface is a surface of the valve body opposite to the port opening surface, and the pressure detecting portion is provided on the surface. Was.

According to a fourth aspect of the present invention, in the second aspect, the surface is a surface of the valve body where the axis of the spool intersects, and the pressure detecting portion is provided on the surface. Was.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the surface is provided with an attaching means capable of attaching a lid for closing the outlet channel. Was.

According to a sixth aspect of the present invention, there is provided a manifold base in which a common air supply passage and a common exhaust passage are formed and a plurality of output ports are provided. Providing a supply air flow path, an exhaust flow path, and an output flow path respectively communicating with the common air supply flow path, the common exhaust flow path, and the output port, and providing a flow path opening surface through which the respective flow paths are opened; An air supply port, an exhaust port, and an output port that are communicated with the spool chamber of the air supply port. The exhaust port is communicated with the exhaust flow path, and the output port is communicated with the output flow path. An electric directional control valve corresponding to each of the output ports, the electric directional control valve being configured to switch communication between the respective supply / exhaust passages through the common port and the common air supply passage and the common exhaust passage to be selectively connected to the output port. In the operation valve manifold, each of the electric operation direction control valves has an outlet passage communicating with any one of the ports formed in the valve body so as to open on a surface other than the port opening surface. And
A pressure detecting unit communicating with the outlet channel and introducing a fluid from the port to the pressure sensor is provided integrally with the valve body.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the pressure detection is performed on a surface of the manifold base parallel to a direction in which the common air supply passage and the common exhaust passage extend. Introduce the signal line connected to the section,
A signal line guide section is provided at the end of the manifold base to form a guide path for guiding.

(Operation) According to the first aspect of the present invention,
The pressure of the fluid at any one of the ports of the valve body whose flow path is switched by the electric actuator is:
The port is communicated with the port and detected by a pressure sensor through an outlet channel that opens on a surface other than the port opening surface where each port opens in the valve body. Therefore, the pressure of the fluid at any of the ports is detected without introducing the fluid from the port that opens to the port opening surface.

According to the second aspect of the present invention, the pressure of the fluid at any one of the ports of the valve main body whose flow path is switched by the electric actuator is detected by a pressure detection unit provided integrally with the valve main body. The port is connected to the port and detected through an outlet channel that opens to a surface other than the port opening surface where each port opens. Therefore, the pressure of the fluid at any of the ports is detected by the pressure detection unit provided integrally with the valve body.

According to the invention described in claim 3, according to claim 2,
In addition to the effect of the invention described in the above, the pressure of the fluid in any one of the ports is detected by the pressure detecting portion provided on the surface of the valve body opposite to the port opening surface.

According to the invention described in claim 4, according to claim 2,
In addition to the operation of the invention described in (1), the pressure of the fluid in any one of the ports is detected by a pressure detector provided on the side surface of the valve body where the axis of the spool intersects. Therefore, the pressure detectors are provided so as to be arranged in the longitudinal direction of the valve body.

According to the invention set forth in claim 5, according to claim 2,
In addition to the effect of the invention described in any one of the fourth to fourth aspects, when the lid is attached to the surface by the attaching means, the outlet channel is closed.

According to the sixth aspect of the present invention, any one of the ports of each of the electrically operated directional control valves is controlled by the pressure detecting unit integrally provided on each of the electrically operated directional control valves provided on the manifold base. The fluid pressure at the port is detected through an outlet channel that communicates with the port and opens on a surface other than the port opening surface where each port opens. Accordingly, the pressure of the fluid at any port of the electric operation direction control valve is detected by the pressure detection unit provided integrally with the electric operation direction control valve.

According to the invention of claim 7, according to claim 6,
In addition to the operation of the invention described in the above, the signal line connected to each pressure detection unit is introduced into the guide passage formed by the signal line guide unit, and is shielded from the outside to the end of the manifold base. You will be guided.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 shows the entire solenoid valve manifold 1, and FIG. 1 shows a cross section thereof. As shown in FIGS. 1 and 2, the solenoid valve manifold 1 includes a manifold base 2, an air supply / exhaust end block 3, a connector end block 4, a plurality of electromagnetic direction control valves 5 as electric operation direction control valves, and the like. I have. A plurality of output port pairs 6 are provided side by side on the right side surface 2a (the right side surface in FIG. 1) of the manifold base 2 in correspondence with each electromagnetic directional control valve 5.

As shown in FIG. 1, the manifold base 2
, A common air supply passage 7, a first common exhaust passage 8 and a second common exhaust passage 9 are formed to extend in the longitudinal direction. From each of the common flow paths 7, 8, and 9, a flow path that opens at a position facing the lower surface of each of the electromagnetic directional control valves 5 on the upper surface 2b (the upper surface in FIG. 1) of the manifold base 2 as a flow path opening surface. 10, 11, and 12 are respectively extended. That is, the air supply passage 10 is provided from the common air supply passage 7, and the first exhaust passage 11 is provided from the first common exhaust passage 8.
However, a second exhaust passage 12 extends from the second common exhaust passage 9.

Each of the output port pairs 6 is a first output port 1
3 and a second output port 14. The two output ports 13 and 14 are configured by connecting a port joint 16 to a joint adapter 15 attached to the right side surface 2 a of the manifold base 2. Each output port 13, 14 is connected to each electromagnetic directional control valve 5 on the upper surface 2 b of the manifold base 2.
The flow paths 17 and 18 which open at positions opposed to each other are communicated with the lower surface of the. That is, the first output port 13
The output flow path 17 communicates with the second output port 14,
The output flow path 18 is connected.

Therefore, in the portion where the lower surface of one electromagnetic directional control valve 5 is opposed to the upper surface 2b, the air supply flow path 10,
The first exhaust channel 11 and the second exhaust channel 12 are opened, and the first output channel 17 and the second output channel 1 are opened.
8 are each opened.

As shown in FIG. 2, the manifold base 2
The air supply / exhaust end block 3 is attached to the rear end of the vehicle. The supply / exhaust end block 3 has a centralized supply port 19.
And a centralized exhaust port 20. The centralized air supply port 19 communicates with the common air supply passage 7 and introduces high-pressure working air from an external pressure source (not shown). The centralized exhaust port 20 communicates with the first common exhaust channel 8 and the second supply / exhaust channel 9 and is open to the outside air.

In the present embodiment, the electromagnetic directional control valve 5 is a pilot-driven 2-position 5-port single-acting solenoid type. As shown in FIG.
1, an electromagnetic solenoid section 22, a manual operation section 23, and a pressure detection section 24.

The valve body 21 has a body 25A and an end piece 25B. As shown in FIG. 1, a spool chamber 26 is formed inside the body 25A. A spool 27 is accommodated in the spool chamber 26. Spool room 2
6, the flow paths 10-1
Port 30 for communicating 2, 17, 18 with spool chamber 26
Lower surface 2 as a port opening surface of body 25A
It is provided so as to open to 5a. And the trunk 2
When the lower surface 25a of the 5a contacts the upper surface 2b of the manifold base 2, the air supply port 30
However, a first exhaust port 31 is provided in the first exhaust channel 11, a second exhaust port 32 is provided in the second exhaust channel 12, and a first output channel 17 is provided in the first exhaust channel 11.
The first output port 33 and the second output port 34 are connected to the second output flow path 18, respectively.

In the body 25A, the first output port 33 communicates with the first output port 33 above the spool chamber 26 and opens to the upper surface 25b of the body 25A as a surface. Second lead-out flow paths 36 communicating with the second output port 34 and opening to the upper surface 25b of the body 25A are formed. In addition, the upper side of the spool chamber 26 in the trunk 25A communicates with the air supply port 30 and the trunk 25A.
An air supply lead-out channel 37 is formed in the upper surface 25b. The air supply outlet channel 37 is formed by a body
And to the right end of the trunk 25A in the flow path 47.

A manual operation section 23 is attached to the left end of the body section 25A via a packing. A first piston chamber 40 adjacent to the spool chamber 26 is provided at a right end of the manual operation unit 23, and a first piston 41 abutting on a left end of the spool 27 is accommodated in the piston chamber 40. In the first piston chamber 40, a left pressure chamber is formed on the left side (left side in FIG. 1) of the first piston 41 by the first piston 41, and a right pressure chamber is formed on the right side (right side in FIG. 1). ing. The right pressure chamber is connected to the first
It is always in communication with the common exhaust passage 8.

An electromagnetic solenoid section 22 as an electric actuator is attached to the left side of the manual operation section 23.
The electromagnetic solenoid section 22 includes a flow path 44 communicating with the air supply lead-out flow path 37 and a flow path 4 communicating with the first common exhaust flow path 8.
5 are communicated with each other via the manual operation unit 23. The electromagnetic solenoid section 22 is connected to the supply pressure outlet passage 3 through the passage 44 in the left pressure chamber of the first piston chamber 40 when excited.
The first common exhaust passage 8 communicates with the left pressure chamber via the passage 45 when not excited.

On the other hand, an end piece 25B is attached to the right end of the body 25A. A second piston chamber 42 adjacent to the spool chamber 26 is provided on the left surface of the end piece 25B, and the second piston chamber 42 accommodates a second piston 43 abutting on the right end of the spool 27. The pressure receiving area of the second piston 43 is formed smaller than that of the first piston 41. In the second piston chamber 42, a left side of the second piston 42 (FIG.
A left pressure chamber is formed on the left side of FIG. 1, and a right pressure chamber is also formed on the right side (right side in FIG. 1). The left pressure chamber is connected to the second common exhaust passage 9 through a passage 46a.
Is always in communication. The right pressure chamber communicates with the air supply passage 37 via a passage 46b. A compression coil spring 48 for urging the second piston 43 toward the spool chamber 26 is accommodated in the right pressure chamber.

Then, in the second piston chamber 42, the second
When the piston 43 is located at the left end of the second piston chamber 42, the first piston 4
1 is disposed at the left end of the first piston chamber 40 (the position of the spool 27 at this time is defined as a left position). Conversely,
In the first piston chamber 40, the first piston 41
When disposed at the right end of the piston chamber 40, the second piston 43 in the second piston chamber 42
2 (the position of the spool 27 at this time is the right position).

When the spool 27 is disposed at the left position, the air supply port 30 and the second output port 34 communicate with the spool 27, and the first output port 33 communicates with the first exhaust port 31. Is done. Conversely, spool 2
7 is arranged at the right side position so that the supply port 30 and the first output port 33 communicate with the spool 27 and the second output port 34 and the second exhaust port 32 communicate with each other. Has become.

The pressure detector 24 is attached to the upper surface 25b of the body 25A, that is, the surface opposite to the lower surface 25a which is the port opening surface. As shown in FIG. 3, the pressure detecting section 24 is fixed to a plurality of screw holes 25c as mounting means provided on the upper surface 25b with respect to the upper surface 25b with screws 69.

The pressure detecting section 24 includes a base 50, a sensor body 51, and a connecting section 52. The base 50 is the trunk 2
The upper surface 25b of 5A is mounted via a packing 53, and the lower surface thereof is provided with an introduction channel 54 communicating with the first outlet channel 35. The introduction flow passage 54 is provided in the sensor mounting hole 5 provided in the upper surface of the base 50.
5 is opened. The base 50 is the second
The outlet channel 36 and the air supply outlet channel 37 are formed to be sealed.

The sensor body 51 is detachable on the upper side of the base 50, and accommodates therein a pressure sensor 56 and a circuit board 57. The pressure sensor 56 is fixed in a state of being engaged with an engagement groove provided in the sensor mounting hole 55 from an opening (not shown), and the introduction channel 54 is connected to a detection unit (not shown). The pressure sensor 56 detects the air pressure in the first outlet channel 35, that is, the inside of the first output port 33 via the inlet channel 54, and outputs a detection signal corresponding to the air pressure to the circuit board 57.

The circuit board 57 is provided with a known reference voltage generating circuit, a comparator and the like. With this configuration, the circuit board 57 converts the detection signal output by the pressure sensor 56 into a reference voltage corresponding to a predetermined reference pressure value. A high-potential or low-potential binary detection signal based on the comparison result is output. Here, the reference pressure value is for determining whether each of the output ports 33 and 34 is connected to the common supply passage 7 or the common exhaust passages 8 and 9.

The connection portion 52 is fixed to the sensor main body 51 to lock a connector 59 of a signal line 58 connected to the circuit board 57 and to connect the signal line 58 to the circuit board 57.
To connect to.

The upper surface 25b of the body 25A of the valve body 21
, A cover (not shown) can be attached in place of the pressure detecting section 24. This lid is a known one, and the electromagnetic directional control valve 5 is closed in a state where the first outlet channel 35, the second outlet channel 36, and the air supply outlet channel 37 are sealed and the pressure detector 24 is not attached. Operate normally.

Further, a joint adapter (not shown) similar to the joint adapter 15 can be fixed to the upper surface 25b of the body 25A instead of the pressure detector 24. An output port can be formed by connecting the port joint 16 to this joint adapter. The output port provided on the upper surface 25b of the valve body 25 in this manner is used when the electromagnetic directional control valve 5 is mounted on a manifold base of a type in which the output flow paths 17 and 18 are not provided to form a solenoid valve manifold. used.

A step is formed along the upper end of the right side surface 2a as the surface of the manifold base 2, and a first engagement groove 60 extending along the step is provided at the back of the step. In the first engagement groove 60, a first wiring cover 61 as a signal line guide provided for each electromagnetic directional control valve 5 is provided.
Are engaged. Each of the first wiring covers 61 introduces a signal line 58 extending from the corresponding electromagnetic directional control valve 5 to a corresponding one of the joint adapters 15 and a connector end block connected to the front end of the manifold base 2. A first guide passage 62 is formed as a guide passage for guiding to the fourth guide passage 4. Each signal line 58 passes through the first guide passage 62 and is connected to the pressure sensor connector 63 of the connector end block 4.
(Shown in FIG. 2).

The left side surface 2c of the manifold base 2 (FIG. 1)
Is formed along the upper side thereof, and a second engaging groove 64a extending along the step is provided at the back of the step. The left side surface 2c is provided with a second engagement groove 64b extending along the lower side thereof. On the left side surface 2c, a second wiring cover 65 that engages with both the second engagement grooves 64a and 64b is provided for each electromagnetic directional control valve 5. Each of the second wiring covers 65 introduces a power supply line 66 extending from the corresponding electromagnetic directional control valve 5 into the inside thereof to the connector end block 4 (shown in FIG. 2) connected to the front end of the manifold base 2. A second guide passage 67 for guiding is formed. Each feed line 66 is connected to the second guide passage 6
7, and is connected to a solenoid valve connector 68 (shown in FIG. 2) of the connector end block 4.

Next, the operation of the solenoid valve manifold 1 configured as described above will be described. In each of the electromagnetic direction control valves 5, when the electromagnetic solenoid section 22 is not excited, the left pressure chamber of the first piston chamber 40 is communicated with the first common exhaust passage 8, so that the spool 27 is connected to the second piston chamber 41. Is left at the left position by the urging force of the compression coil spring 48 in the right pressure chamber and the pressure of the working air. At this time, the first output port 33 is in communication with the first exhaust port 31, and the first outlet channel 35 is in communication with the first common exhaust channel 8. As a result, the pressure detector 24
Since the air pressure in the introduction passage 54 becomes lower than the reference pressure value, the pressure detection unit 24 outputs a detection signal based on the low pressure.

When the electromagnetic solenoid 22 is excited and high-pressure operating air is introduced into the left pressure chamber of the first piston chamber 40, the spool 27 is attached to the compression coil spring 48 by the pressure difference between the two pistons 41 and 43. It is driven to the right against the power and placed at the right position. Then, since the air supply port 30 is communicated with the first output port 33, the common air supply passage 7 is communicated with the first outlet passage 35. As a result, the working air having a pressure higher than the reference pressure value is introduced into the introduction flow passage 54 of the pressure detecting unit 24, so that the pressure detecting unit 24 outputs a detection signal based on the pressure of the high-pressure working air.

Accordingly, a change in air pressure in the first output port 33 based on the operation of the electromagnetic solenoid unit 22 is detected by the pressure detection unit 24 provided integrally with the electromagnetic direction control valve 5.

The pressure detector 24 of each electromagnetic directional control valve 5
Are connected to the first wiring cover 61.
Is guided to the connector end block 4 by the first guide passage 62 formed by the above, so that each signal line 58 introduced into the first guide passage 62 is introduced into the connector end block 4 in a state of being shielded from the outside. Is done.

As described in detail above, according to the solenoid valve manifold 1 of the present embodiment, the following effects can be obtained. (A) The valve main body 21 of the electrically operated directional control valve (electromagnetic directional control valve 5) having the ports 30 to 34 opened on the lower surface 25a is communicated with any one of the ports.
An outflow channel (first outflow channel 35) that opens to an upper surface 25b as a surface different from 5a is provided. Further, the valve main body 21 is integrally provided with a pressure detecting section 24 for introducing a fluid to the pressure sensor 56 from a port communicating with the outlet flow path. Therefore, it is possible to detect the pressure of the fluid in any one of the ports without taking out the fluid of any of the ports from the port opening surface where each port is opened in the valve body.

(B) The pressure detecting section 24 is integrally provided on the valve body 21 of the electrically operated directional control valve (electromagnetic directional control valve 5) mounted on the manifold base 2,
The pressure of the fluid at any one of the ports 30 to 34 opening to the port a can be detected.

As a result, in order to confirm the operation of the electromagnetic directional control valve 5 based on a control signal from a programmable controller or the like based on a change in air pressure, a branch pipe is provided in the pipe connected to the output ports 13 and 14 so as to reduce the pressure. There is no need to connect a sensor. When the pressure sensor 56 is unnecessary, the cover can be attached to the upper surface 25b of the body 25A with the screw hole 25c instead of the pressure detection unit 24, so that the electromagnetic directional control valve 5 is connected to the manifold base 2. There is no need to remove it from.

(C) An outlet channel (first outlet channel 3) is provided on the surface (upper surface 25b) opposite to the port opening surface (lower surface 25a).
5), and a pressure detector 24 was provided on the surface. Therefore, a plurality of electric operation direction control valves can be mounted close to the manifold base 2.

(D) Attachment means (25) provided on the surface (upper surface 25b) where the outlet channel (first outlet channel 35) opens.
In c), a lid for closing the outlet channel can be attached. Therefore, the pressure detection unit 24 can be provided as needed. As a result, the valve main body 21 can be commonly used regardless of the presence or absence of the pressure detection unit 24.

Further, a joint adapter is attached to the surface (upper surface 25b) in place of the pressure detecting section 24, and an output port can be attached with the joint adapter. Therefore,
An output port can be provided directly on the electrically operated directional control valve (electromagnetic directional control valve 5) and mounted on the manifold base 2.

(E) A connector end block for connecting the signal line 58 of each pressure detecting section 24 to the front end of the manifold base 2 with the first wiring cover 61 attached along the longitudinal direction of the manifold base 2. 1st to guide to 4
A guide passage 62 was formed. Accordingly, since each signal line 58 introduced into the first guide passage 62 is guided to the connector end block 4 in a state where it is shielded from the outside, each signal line 5
8 can be easily maintained and managed, and the appearance can be improved.

The first wiring cover 61 is provided for each electric operation direction control valve. Therefore, the same first wiring cover 61 can be used regardless of the number of electric operation direction control valves mounted on the manifold base 2.

(F) The pressure detecting section 24 has a pressure sensor 56
Output a binary detection signal based on the result of comparing the detected pressure value with a preset reference pressure value. Therefore, it is possible to clearly determine which of the first supply port 33 and the first common exhaust path 8 is communicated with.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. still,
This embodiment is different from the first embodiment in that the valve body 25 and the pressure detector 24 of the electromagnetic control valve 5 are replaced by a valve body 71.
And a pressure detecting unit 72. Therefore,
The configurations of the valve body 71 and the pressure detection unit 72 will be described in detail, and the same reference numerals will be used for other identical configurations, and description thereof will be omitted.

FIG. 4 shows a cross section of the solenoid valve manifold 1. The electromagnetic direction control valve 70 includes a valve main body 71, an electromagnetic solenoid unit 22, a manual operation unit 23, and a pressure detection unit 72.

The valve body 71 does not include the end piece 25B of the valve body 25 of the first embodiment, and
Only the trunk 73 having the same configuration as that of A is provided. The trunk portion 73 includes the second lead-out channel 36 and each of the channels 3
The third outlet channel 74 is not provided with the upper surface 25b as a surface on which the openings 5, 36, and 37 are opened, but is instead connected to the first outlet channel 35 and opened on the right end surface 73a as the port opening surface.
It has.

The pressure detecting section 7 is provided on the right end face 73a of the body 73.
2 are attached. The pressure detecting section 72 has basically the same configuration as the pressure detecting section 24 of the first embodiment, but differs in form. The pressure detecting section 72 includes the base 7
5, a pressure sensor 76, a circuit board 77, a cover 78 and the like.

The base 75 is attached to the right end face 73a via packing. The base 75 forms a second piston chamber 42 adjacent to the right opening of the spool chamber 26 and accommodating the second piston 43 in place of the end piece 25B in the first embodiment. In addition, the base 75 connects the flow path 47 communicating with the air supply derivation flow path 37 to the second flow path.
A guide channel 79 that communicates with the piston chamber 42 is provided.

The base 75 has a mounting hole 75a for fixing the pressure sensor 76, and also has an introduction channel 80 for communicating the third lead-out channel 74 to the bottom surface of the mounting hole 75a.

A circuit board 77 and a cover 78 for covering the circuit board 77 and the pressure sensor 76 are mounted on the side of the base 75 on which the pressure sensor 76 is mounted. The cover 78 is provided with a connection portion (not shown) to which the connector 59 is connected.

Next, the operation of the solenoid valve manifold 1 configured as described above will be described. When the spool 27 is disposed at the left position, the first output port 33 and the first exhaust port 31 communicate with each other, and the third outlet channel 74 communicates with the first common exhaust channel 8. Therefore, a low pressure in the first common exhaust passage 8 is introduced into the pressure sensor 76 through the introduction passage 80, and the pressure is detected by the pressure sensor 76.

When the spool 27 is located at the right position,
The first output port 33 and the air supply port 30 communicate with each other, and the third
The common supply channel 7 is communicated with the outlet channel 74. Therefore,
The high pressure of the common air supply passage 7 is introduced into the pressure sensor 76 via the introduction passage 80, and the pressure is detected by the pressure sensor 76.

As described in detail above, according to the solenoid valve manifold 1 of the present embodiment, each effect described in (a), (b), (e), and (f) of the first embodiment. In addition to the above, the following effects can be obtained.

(A) The spool 27 in the valve body 71
The pressure detector 7 is provided on the side (right end face 73a) where the axes of
2, the pressure detecting sections 72 are arranged so as to be arranged in the longitudinal direction of the valve main body 71. Therefore, the pressure detection unit 27 can be provided so that the electric operation direction control valve 70 does not become large around the axis of the spool 27. As a result, the electric operation valve manifold 1 on which the electric operation direction valve 70 is mounted can be flattened.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. still,
In the present embodiment, the electromagnetic directional control valve 5 of the first embodiment is a double-acting solenoid double-acting electromagnetic directional control valve 81, and the end piece 25B of the first embodiment is an electromagnetic directional control valve. In addition to replacing the solenoid unit 22 and the manual operation unit 23, the second piston chamber 42 and the second piston 43 have the same size as the first piston chamber 40 and the first piston 41, respectively, and the compression coil spring 48 is eliminated. Further, in the present embodiment, the pressure detector 2
4 is replaced by a pressure detection unit 82. Therefore, the configuration of the pressure detection unit 82 will be described in detail, and the same reference numerals will be used for other same configurations, and description thereof will be omitted.

FIG. 5 shows a cross section of the solenoid valve manifold 1. As shown in FIG. 5, the body 25A of the valve body 21
A manual operation unit 23 is attached to the right side surface of the camera. In place of the end piece 25B of the first embodiment, a second piston chamber 42 that is adjacent to the right opening of the spool chamber 26 and accommodates the second piston 43 is formed on the left side surface of the manual operation unit 23. Have been. An electromagnetic solenoid 22 as an electric actuator is attached to the right side of the manual operation unit 23.

The body 25A has an upper surface 25 as its surface.
The pressure detection unit 82 is attached to b. Pressure detector 82
Is basically the same as the pressure detecting section 24 of the first embodiment, and is different in that the connecting section 52 is replaced with a connecting section 83. The connection portion 83 locks the connector 59 in the axial direction of the spool 27. This is because the electromagnetic solenoid 23 is provided below the connector 59.

Next, the operation of the solenoid valve manifold 1 configured as described above will be described. When the spool 27 is disposed at the left position, the first output port 33 and the first exhaust port 31 communicate with each other, and the first common exhaust channel 8 communicates with the first outlet channel 35. Therefore, a low pressure in the first common exhaust passage 8 is introduced into the pressure sensor 56 via the introduction passage 54, and the pressure is detected by the pressure sensor 56.

When the spool 27 is located at the right position,
The first output port 33 communicates with the air supply port 30 and the first
The common air supply passage 7 communicates with the outlet passage 35. Therefore,
The high pressure of the common air supply passage 7 is introduced into the pressure sensor 56 via the introduction passage 54, and the pressure is detected by the pressure sensor 56.

As described in detail above, according to the solenoid valve manifold 1 of the present embodiment, the following effects are obtained in addition to the effects (a) to (f) of the first embodiment. be able to.

(A) An electric operation direction control valve in which the spool 27 is driven in both directions by electric actuators (electromagnetic solenoids 22) provided on the respective sides of the valve body 21 where the axis of the spool 27 intersects, Torso 25
An outlet channel (first outlet channel 35) was opened in the upper surface 25b of A, and the pressure detector 82 was attached to the upper surface 25b. Therefore, in the both-side solenoid type electric operation direction control valve,
The fluid pressure at each port opened on the lower surface of the valve body 21 can be detected by the pressure detection unit 82 provided integrally with the valve body 21.

The embodiments are not limited to the above embodiments, but may be modified as follows. (1) In the first embodiment, the pressure detector 24
The air pressure at the second output port 34 may be detected by providing an introduction flow passage 54 communicating with the second outflow passage 36 instead of the first outflow passage 35 in the base 50. Similarly, in the second and third embodiments, the second
An introduction channel 54 communicating with the outlet channel 36 may be provided.

(2) In the first embodiment, when the pressure detecting section 24 is rotated by 180 degrees in the horizontal plane, that is, when the connecting section 52 is arranged on the left side (in FIG. 1), the pressure detecting section 24 detects the pressure. The portion 54 may be fixed to the upper surface 25b of the body 25A so that the introduction flow passage 54 can be communicated with the second outgoing flow passage 36. In this case, the first output port 3
The user can select a pressure detection port out of the third and second output ports 34.

Similarly, in the third embodiment, the pressure detector 82 may be reversibly attached to the upper surface 25b of the valve body 21. In each case, the signal line 58 of each of the pressure detectors 24 and 82 is connected to the second
It is guided to the connector end block 4 by the guide passage 67. (3) In the first embodiment, the pressure detection unit 24 outputs a binary detection signal based on a comparison result between the detected air pressure and a preset reference pressure value. Alternatively, an analog signal may be output. In this case, a change in the air pressure of each of the output ports 33 and 34 based on the operation of the electromagnetic direction control valve 5 can be detected. Note that the second and third embodiments may be similarly configured.

(4) In the first embodiment, two pressure sensors 56 are provided in the sensor main body 24, and the base 50 is connected to the introduction flow passage 54 communicating with the first discharge flow passage 35, and the second discharge flow An introduction flow path communicating with the path 36 is provided. The pressure sensors 56 may detect the air pressure at the first output port 33 and the air pressure at the second output port 34, respectively. In this case, each output port 3 based on the operation of the electromagnetic directional control valve 5
The changes in the air pressures of 3, 34 can be reliably detected.

Similarly, in the second and third embodiments, 2
Pressure detectors 72, 8 having two pressure sensors 56, 76
The air pressure at both output ports 33 and 34 may be detected simultaneously.

(5) In the first embodiment, the base 50
May be provided with an introduction flow path communicating with the air supply derivation flow path 37, and the air pressure in the air supply port 30 may be detected via the air supply derivation flow path 37. In this case, it is possible to detect a change in air pressure in the common air supply passage 7 based on the operation of the electromagnetic solenoid unit 22.

Similarly, in the second and third embodiments, the pressure of the air at the air supply port 30 may be detected by providing the bases 50 and 75 with an introduction flow path communicating with the air supply derivation flow path 37. Good.

In the first embodiment, an outlet passage communicating with the first exhaust port 31 or the second exhaust port 32 is formed above the body 25A, and the outlet passage communicates with the base 50. By providing an introduction flow path, the air pressure at the first exhaust port 31 or the second exhaust port 32 may be detected. In this case, a change in air pressure in the first common exhaust passage 8 or the second common exhaust passage 9 based on the operation of the electromagnetic solenoid unit 22 can be detected.

Similarly, in the second and third embodiments, an outlet passage communicating with the first exhaust port 31 or the second exhaust port 32 may be provided in the body. (6) As shown in FIG.
1 is provided in the axial direction of the spool 27, and the base 85 of the pressure detector 84 is formed to extend to the upper surface 25b as the port opening surface of the body 25A. The base 85 has an introduction flow path 8 that guides the flow path (first flow path 35) opened to the upper surface 25 b to the pressure sensor 76.
6 is provided. In this case, the pressure detecting section 84 is provided so that the electric operation direction control valve does not become larger around the axis of the spool 27 while using the valve body 21 having the outlet channel opened on the upper surface 25 of the body 25A. be able to.

(7) The electric operation direction control valve in each embodiment is not limited to the electromagnetic position control valve 5 having two positions and five ports, but may have other positions, ports, and solenoids. . For example, a two-position three-port valve having one output port may be used.

Further, a double-acting type may be used. The type of the valve is not limited to the pilot-driven directional control valve, and may be a type directly driven by an electric actuator such as an electromagnetic solenoid. (8) In the first embodiment, the pressure detector 24 may be formed such that the base 50 and the sensor main body 51 cannot be disassembled. Similarly, in the second and third embodiments, the bases 75 and 50 and the sensor main body side may be formed so as not to be disassembled.

(9) In each embodiment, instead of the electromagnetic solenoid 22, an electric operation direction control valve using an electric actuator such as a linear motor or a rotary motor may be used.

(10) In each embodiment, instead of forming the first guide passage 62 by arranging a plurality of first wiring covers 61 formed of the respective electromagnetic directional control valves 5, the length of the manifold base 2 is integrated. The guide passage may be formed by the wiring cover formed by the above. Also in this case, the signal lines of each pressure detection unit can be put together.

(11) In each embodiment, the electromagnetic directional control valve 5 constituting the electromagnetic valve manifold 1 may be replaced with a single electromagnetic directional control valve. Also in this case, it is not necessary to attach a pressure sensor using a branch pipe or the like to the electromagnetic directional control valve, and the overall size of the electromagnetic directional control valve including the pressure sensor can be made compact.

The technical ideas other than the claims which can be grasped from the embodiment will be described below together with their effects. (1) The electric operation direction control valve according to claim 3, wherein the electric actuator is an electromagnetic solenoid, and the spool is bidirectionally moved by an electromagnetic solenoid provided on each surface of the valve body where the axis of the spool intersects. Drive. According to such a configuration, in a double-sided solenoid type electromagnetic directional control valve having electromagnetic solenoids on both sides in the longitudinal direction of the valve body, any one of the valve bodies is provided by a pressure detection unit provided integrally with the valve body. The pressure of the fluid at one of the ports can be detected.

(2) The electrically operated directional control valve according to any one of claims 1 to 5, or the electrically operated valve manifold according to claim 6 or 7 is used for air control. According to such a configuration, for the electrically operated directional control valve performing the air control, the pressure of the fluid at the port is detected without taking out the fluid at any of the ports from the port opening surface where each port is opened in the valve body. can do.

[0093]

As described above in detail, according to the first to fifth aspects of the present invention, the fluid of any one of the ports is removed from the surface other than the port opening surface where each port is opened in the valve body. It can be taken out and its pressure can be detected.

According to the third aspect of the present invention, the pressure detector can be provided on the surface opposite to the port opening surface.
According to the fourth aspect of the present invention, the pressure detecting section can be provided so that the dimension of the spool around the axis does not increase.

According to the fifth aspect of the present invention, a pressure detecting section can be provided if necessary. According to the invention as set forth in claim 6 or 7, without providing a pressure sensor in a pipe connected to an output port provided in the manifold base, and without removing the electric operation direction control valve from the manifold base. The pressure of the fluid can be detected.

According to the seventh aspect of the present invention, signal lines connected to the respective pressure detecting sections can be collected.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a solenoid valve manifold according to a first embodiment.

FIG. 2 is a perspective view showing the entire solenoid valve manifold.

FIG. 3 is an exploded perspective view of a pressure detector.

FIG. 4 is a sectional view showing a solenoid valve manifold according to a second embodiment.

FIG. 5 is a sectional view showing a solenoid valve manifold according to a third embodiment.

FIG. 6 is a sectional view showing another example of a solenoid valve manifold.

FIG. 7 is a schematic diagram in which a pressure sensor is provided in a conventional solenoid valve manifold.

[Explanation of symbols]

2 ... Manifold base, 2a ... Right side as surface, 2
b: Upper surface as a passage opening surface, 5: Electromagnetic directional control valve as an electric operation direction control valve, 7: Common air supply passage, 8: First common exhaust passage as a common exhaust passage, 9 ... 2 common exhaust passage, 10 air supply passage as passage, 11 similarly first exhaust passage, 12 similarly second exhaust passage, 13 first output port as output port, 14 similarly second exhaust passage Output port, 17: first output channel, 18: second output channel, 21: valve body, 22: electromagnetic solenoid as electric actuator, 24: pressure detector, 25a
Lower surface as a port opening surface, upper surface as a 25b ... surface,
25c: screw hole as attachment means; 26: spool chamber;
Reference numeral 30 denotes an output port as a port, 31 denotes a first exhaust port, 32 denotes a second exhaust port, 33 denotes a first output port, 34 denotes a second output port, and 35 denotes a second exhaust port.
A first outlet channel as an outlet channel, 56 ... a pressure sensor, 5
Reference numeral 8: signal line, 61: first wiring cover as a signal line guide, 62: first guide passage as a guide passage, 70: electromagnetic directional control valve as an electric operation directional control valve, 71: valve body, 72 ... Pressure detecting section 73a: right end face as plane, 8
1. Electromagnetic directional control valve as electric directional control valve, 82
... Pressure detector.

Claims (7)

[Claims] 1. A spool chamber (2) of a valve body (21, 71).
6) a plurality of ports (30-34) communicating with each other;
Each of the ports (30 to 34) is connected to the valve body (21, 71).
A port opening surface (25a) is formed in one side of the spool (2), and the spool (2) accommodated in the spool chamber (26) is opened.
7) A pressure detection method for an electrically operated directional control valve that switches a flow path by operating an electric actuator (22), wherein the port is connected to any one of the ports (33). Outlet passages (35, 74) are formed in the valve body (21, 71) so as to open on surfaces (25b, 73a) other than the port opening surface (25a). A pressure detecting method for an electrically operated directional control valve for detecting a pressure of the port (33) by introducing a fluid from the port (33) to the pressure sensor (56, 76) through the port (74). 2. A spool chamber (2) of a valve body (21, 71).
6) a plurality of ports (30-34) communicating with each other;
Each of the ports (30 to 34) is connected to the valve body (21, 71).
A port opening surface (25a) is formed in one side of the spool (2), and the spool (2) accommodated in the spool chamber (26) is opened.
7) An electric operation direction control valve for switching a flow path by operating an electric actuator (22), wherein an outgoing flow path communicating with any one of the ports (33) among the ports (30 to 34). (35, 74) is formed in the valve body (21, 71) so as to open on a surface (25b, 73a) other than the port opening surface (25a), and communicates with the outlet channel (35, 74). An electrically operated directional control valve, wherein a pressure detecting portion (24, 72) for introducing a fluid from the port (33) to the pressure sensor (56, 76) is provided integrally with the valve body (21, 71). 3. The valve body (21) wherein the surface (25b) is provided on the valve body (21).
At the side opposite to the port opening surface (25a) (2).
5b), and the pressure detection unit (2) is provided on the surface (25b).
The electrically operated directional control valve according to claim 2, wherein 4) is provided. 4. The surface (73a) is provided on the valve body (71).
At the plane (7) where the axis of the spool (27) intersects.
3a), wherein the pressure detecting section (7) is provided on the surface (73a).
The electrically operated directional control valve according to claim 2, further comprising (2). 5. The outlet channel (3) is provided on the surface (25b).
Attachment means (25) to which a lid for closing 5) can be attached.
The electrically operated directional control valve according to claim 2, wherein c) is provided. 6. A common air supply passage (7) and a common exhaust passage (8, 9) are formed and a plurality of output ports (1) are formed.
(3), a manifold base (2) provided with the common air supply passage (7) corresponding to each of the output ports (13, 14);
Common exhaust passages (8, 9) and output ports (13, 14)
Air supply passage (10) and exhaust passage (1
1, 12) and an output flow path (17, 18), and a flow path opening surface (2b) in which the flow paths (10, 12, 17, 18) are opened, and a valve body (21, 71). And a supply port (30), an exhaust port (31, 32) and an output port (33, 34) communicating with the spool chamber (26).
The port opening surface (25a) where the opening 34) opens is brought into contact with the flow path opening surface (2a) so that the air supply port (30) is in the air supply flow path (10) and the exhaust ports (31, 32).
To the exhaust passages (11, 12) and the output port (3).
3, 34) are communicated with the output flow paths (17, 18), respectively, and a spool (27) housed in the spool chamber (26) is operated by an electric actuator (22).
The respective supply / discharge passages (10-12, 17, 18) are switched and communicated via the respective ports (30-34), and the common supply passage (7) is connected to the output ports (13, 14). And an electric directional control valve (5, 70, 81) for switching communication between the common exhaust passages (8, 9) and the output ports (13, 1).
4) In the electrically operated valve manifold provided corresponding to (4), each of the electrically operated direction control valves (5, 70, 81) has one of the ports (30 to 34).
3) A discharge channel (35, 74) communicating with 3) is formed in the valve body (21, 71) so as to open to a surface (25b, 73a) other than the port opening surface (25a). A pressure detecting portion (24, 72) communicating with a passage (35, 74) and introducing a fluid from the port (33) to the pressure sensor (56, 76) is provided integrally with the valve body (21, 71). Electrically operated valve manifold. 7. The electrically operated valve manifold according to claim 6, wherein a surface of the manifold base (2) is parallel to a direction in which the common air supply passage (7) and the common exhaust passage (8, 9) extend. (2a) includes the pressure detection units (24, 7).
2), and a guide passage (6) for introducing a signal line (58) to an end of the manifold base (2).
An electrically operated valve manifold provided with a signal line guide (61) forming 2).