JPH1096404A - Pressure regulating valve for switching valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure regulation valve for a switching valve to simplify constitution of a flow passage and prevent a decrease in the sectional area of a flow passage. SOLUTION: A pressure regulation valve 1 comprises a flow passage member provided with a valve hole 22 in a vale casing 15 and a pressure regulation passage 23; feed passages 24a and 24b to communicate the feed port of a base to the feed port of a switching valve through the valve hole 22; output passages 19a and 19b and discharge passages 20a and 20b, running between the valve casing and the flow passage member and individually communicating the output port and the discharge port of the base with the output port and the discharge port of the switching valve; a valve stem 26 provided with a first valve element 27 to effect and cut off communication of the feed passage and inserted in a flow passage gap provided at a valve hole; a pressure regulation part 18 arranged at one end of the valve casing; and a return spring 44 situated at the other end thereof. Since the output passage and the discharge passage are arranged between the valve casing and the flow passage member, the sectional areas of the flow passages is prevented from decrease.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure control valve for a switching valve for adjusting a supply fluid pressure and an output fluid pressure of the switching valve.

[0002]

2. Description of the Related Art In some hydraulic equipment, it is necessary to adjust a supply fluid pressure supplied to the hydraulic equipment depending on a set pressure and an operation state of the equipment. It is necessary to install a pressure control valve such as a pressure reducing valve in a pipe connecting the output port of the switching valve and the fluid pressure device.
However, when the pressure control valve is attached to the pipe, there is a problem that a large space is required and the cost is increased. In order to solve the above space problem, it is most effective to provide a pressure control valve between the switching valve and a base on which the switching valve is installed. If a pressure regulating valve is provided between the base and the switching valve, the flow path cross-sectional area between the base and the switching valve becomes small.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure control valve for a switching valve which has a simple structure of a flow passage and does not reduce the cross-sectional area of the flow passage.

[0004]

In order to solve the above-mentioned problems, a pressure control valve for a switching valve according to the present invention comprises: a base having at least a supply port and a discharge port for a pressure fluid; A switching valve having a second output port and a discharge port, and switching the first and second output ports between a supply port and a discharge port to communicate with each other; The pressure regulating valve communicates a supply port with a supply port via a valve hole, a valve hole provided in the valve case and having a valve hole and a pressure regulating path that are open at both ends in the axial direction. A supply passage, a discharge passage communicating the discharge port and the discharge port formed between the valve box and the flow path member,
A valve stem that is movably inserted with a flow passage gap in the valve hole, a pressure regulator that is provided on one side in the axial direction of the valve box, and a valve stem that is contracted in a return chamber that communicates with the pressure regulating path. Return means for biasing the supply passage, and wherein the valve stem seals a flow path gap between the supply passage and the return chamber, and a first valve body that cuts off communication with the supply passage. A supply fluid, comprising a sealing member, wherein the pressure adjusting section includes a pressure adjusting member urged toward the valve stem by an urging means capable of adjusting an urging force, and acts against the pressure adjusting member. Adjusting the supply fluid pressure by the sum of the acting force of the pressure and the urging force of the return means and the set urging force of the urging means; or the valve stem of the pressure regulating valve is provided instead of the first seal member. It is characterized in that it has a second seal member for sealing the passage and the passage gap on the side of the pressure regulator.

[0005] In order to solve the same problem, the pressure regulating valve includes a valve case, a flow passage member having a valve hole and a pressure regulating passage which are installed in the valve case and whose both ends in the axial direction are open. A supply passage communicating the supply port with the supply port through the valve hole, a discharge passage communicating the discharge port formed between the valve box and the flow path member with the discharge port, and a second passage opening the first output port to the valve hole. (1) an output passage, a valve stem movably inserted with a passage gap provided in a valve hole, and a pressure regulator provided on one axial side of a valve box;
A return means for urging a valve rod contracted to a return chamber communicating with the pressure regulating path toward the pressure adjusting portion, wherein the valve rod cuts off communication with the supply passage; A first seal member for sealing a flow passage gap between the passage and the first output passage; and a second seal member for sealing a flow passage gap between the supply passage and the pressure adjusting unit side, wherein the pressure adjustment is performed. A pressure adjusting member urged toward the valve stem by an urging means capable of adjusting an urging force, wherein the force acting on the output fluid pressure of the first output port acts against the pressure adjusting member. Further, the output fluid pressure of the first output port is adjusted by the sum of the urging forces of the return means and the set urging force of the urging means.

Further, in order to solve the same problem, a pressure regulating valve is provided in a valve case, a flow path member having a valve hole and a pressure regulating passage installed in the valve case and having both ends opened in the axial direction. A supply passage having an opening communicating with the supply port through the valve hole, a discharge passage communicating the discharge port formed between the valve box and the flow path member with the discharge port, and a second passage opening the second output port to the valve hole.
An output passage, a valve stem movably inserted with a passage gap in the valve hole, a pressure regulator provided on one axial side of the valve box, and a valve contracted in a return chamber communicating with the pressure regulating passage. A return means for urging the rod toward the pressure adjusting section, wherein the valve rod seals a first valve body passing through the supply passage and a flow passage gap between the supply passage and the return chamber. 1 seal member, and a second seal member for sealing a flow passage gap between the supply passage and the second output passage, wherein the pressure adjusting section is directed toward the valve stem by an urging means capable of adjusting an urging force. A sum of the acting force of the output fluid pressure of the second output port and the urging force of the return means, and a setting urging force of the urging means. Thus, the output fluid pressure of the second output port is adjusted.

In order to discharge the residual pressure, the first seal member of each of these pressure regulating valves is replaced with a Y-shaped valve having a supply passage opening.
Or V-shaped packing.

Further, in order to reduce the residual pressure and to reduce the sliding resistance of the valve rod, the first and second seal members of these pressure regulating valves are provided with a Y-shaped or V-shaped packing whose supply passage side is open. It is characterized by doing.

[0009]

1 to 4 show a first embodiment of the present invention for adjusting a supply air pressure supplied to a switching valve. This pressure adjusting valve 1 is installed between a base 2 and a switching valve 3. FIG. These members are integrally assembled by appropriate mounting means such as mounting screws (not shown). The base 2 is provided with a supply port 5 for a pressure fluid that opens on one surface.
And first and second discharge ports 6A and 6B, and first and second output ports 7A and 7B opened on the opposite surfaces, and these openings are individually formed on the upper surface of the base 2 by passages. It is open to. However, the base can be connected in a known manner, having a supply passage and a discharge passage for the pressure fluid penetrating in the connecting direction, and two output ports opened on one side surface orthogonal to the connecting surface. Can be base.

The switching valve 3 has a main valve 9 and a pilot solenoid valve 10. The main valve 9 includes a pressure fluid supply port P, first and second output ports A and B, and first and second discharge ports EA and EB that open on the lower surface (the surface on the base side).
And an axial valve hole 11 in which these ports are open. A valve body 12 is inserted into the valve hole 11 so as to be slidable in an airtight manner. When the pilot fluid is output from the pilot solenoid valve 10 to the main valve 9 by the excitation of the solenoid, the switching valve 3 moves the valve body 12 rightward in the drawing to supply the supply port P, the first output port A, and the second output port. When the port B communicates with the second discharge port EB and the excitation of the solenoid is released, the main valve 9 is released.
Is discharged, the valve body 12 returns to the illustrated state by the internal pilot fluid supplied to the chamber opposite to the pilot solenoid valve, and the supply port P, the second output port B, and the first The output port A and the first discharge port EA communicate with each other, and are configured as a single pilot type switching valve.

However, the switching valve 3 is not limited to the illustrated single pilot switching valve, but may be a double pilot switching valve, a direct acting switching valve, or the like. In the illustrated switching valve, the first and second output ports A and B are opened only on the lower surface of the main valve 9, but these output ports are connected to the lower surface of the main valve 9 and the upper surface of the main valve 9. Alternatively, the main valve 9 can be opened to both the pilot solenoid valve 10 and the opposite surface, and in these cases, the output ports 7A and 7B of the base 2 can be eliminated.

The pressure regulating valve 1 shown in detail in FIG. 2 has a valve box 15 having substantially the same width and axial length as the base 2 and the switching valve 3, and a gap provided in the valve box 15 in the width direction. It has a flow path member 16 formed in the axial direction, a holding lid 17 attached to one axial side of the valve box 15, and a pressure adjusting section 18 attached to the other side. In the meantime, the first and second output ports 7A and 7B and the first and second discharge ports 6A and 6B of the base 2 are connected to the output ports A and B and the discharge ports EA and EB of the switching valve 3, respectively. , The second output passages 19a, 19b and the first and second discharge passages 20a, 20b.
(See FIG. 4C). If the base 2 does not have the output ports 7A and 7B, the output passages 19a and 19b
Are connected to the output ports A and B, respectively.

The flow path member 16 has an axial valve hole 22 and a pressure regulating path 23 disposed in parallel in the vertical direction, and both ends of these flow paths communicate with the inside of the valve box 15. In the valve box 15, a first supply passage 24 a for communicating the supply port 5 with the valve hole 22 and a second supply passage 24 a for communicating the valve hole 22 with the supply port P are provided.
The supply passages 24b are formed with a slight interval in the axial direction, and the first valve seat 2 is provided in the valve hole 22 between these supply passages.
5 are formed (see FIGS. 3 and 4A and 4B). A valve stem 26 is movably inserted into the valve hole 22 with a flow path gap provided between the valve stem 26 and the valve hole 22. This valve stem 26 is
A first valve body 27 that opens and closes a valve seat 25 to cut off communication between the first supply passage 24a and the second supply passage 24b;
7, a first seal member 28 that seals a flow path gap between the first supply passage 24a and the presser lid 17 side, which is attached to the first valve body 27. The first valve seat 25 is related to be closed when the forces acting on the left and right sides are equal.

The pressure adjusting section 18 includes a pressure adjusting case 30.
A pressure adjusting screw 31 screwed to the tip of the pressure adjusting case;
A spring seat 32 that is axially movable and non-rotatably inserted into the pressure adjustment case 30, and a pressure adjustment member that is larger in diameter than the spring seat 32 and is airtightly slidably inserted into one end opening of the valve box 15. A pressure adjusting piston 33, which is an example, and a pressure adjusting spring 35 that constitutes a biasing means and is provided in a pressure adjusting chamber 34 between the spring seat 32 and the pressure adjusting piston 33 are provided. Pressure adjusting piston 33
Has a second valve body 37 on the flow path member 16 side, and communicates a pressure regulating piston 33 and the second valve body 37 with a pressure regulating piston chamber 38 between the pressure regulating piston 33 and the valve box 15 with the pressure regulating chamber 34. The pressure regulating chamber 34 communicates with the outside through a breathing hole 40.

The holding lid 17 has a concave portion 42 for communicating the valve hole 22 and the pressure regulating passage 23, and a detection port 43 for attaching a pressure gauge (not shown) communicating with the concave portion. A return spring (return means) 44 having a smaller biasing force than the pressure regulating spring 35, which is provided in the return chamber 45 on the side of the holding lid 17 of the valve hole 22, is urged toward the pressure regulating piston 33.

In the first embodiment, the pressure adjusting screw 31 is moved forward and backward with respect to the pressure adjusting case 30, the urging force of the pressure adjusting spring 35 is set to a desired urging force, and the position of the pressure adjusting screw 31 is locked. Locked by the nut 36. When the compressed air is not supplied to the supply port 5 of the base 2, the pressure adjusting piston 33 and the valve rod 26 move leftward in the drawing due to the set urging force of the pressure adjusting spring 35 to open the first valve seat 25. Base 2
The supply port 5 of the switching valve 3 and the supply port P of the switching valve 3
a, 24b and the valve hole 22 communicate with each other. When compressed air is supplied to the supply port 5, the supply passage 24a and the return chamber 4
5 is sealed by the first seal member 28, flows into the pressure adjustment piston chamber 38 through the pressure adjustment section 18 side flow path gap, and further passes through the pressure adjustment path 23. And flows into the return chamber 45.

The pneumatic force of the pressure adjusting piston chamber 38 acting against the pressure adjusting piston 33 and the return spring 4
When the sum with the urging force of No. 4 is larger than the set urging force of the pressure adjusting spring 35, the pressure adjusting piston 33 moves rightward in the drawing to open the discharge hole 39. Thereby, the pressure adjustment piston chamber 38
Is discharged to the outside through the discharge hole 39, the pressure regulating chamber 34 and the breathing hole 40, so that the acting force of the air pressure acting on the pressure regulating piston 33 decreases, and this acting force and the urging force of the return spring 44 The pressure adjustment piston 33 and the valve rod 26 move leftward in the figure until the sum of the pressure adjustment spring 35 and the set urging force of the pressure adjustment spring 35 becomes substantially equal to each other.
5, the communication between the supply passages 24a and 24b is interrupted (see FIG. 2), so that the supply air pressure at the supply port P of the switching valve 3 is adjusted to the pressure set by the pressure adjusting spring 35,
This supply air pressure can be detected by a pressure gauge attached to the detection port 43. In this case, the supply air pressure can be adjusted by moving the pressure adjusting screw 31 forward and backward to adjust the urging force of the pressure adjusting spring 35.

In the first embodiment, the output port 7 of the base 2 is used.
A, 7B and output passages 19a, 19b for communicating between the output ports A, B of the switching valve 3, and the discharge ports 6A,
As shown in FIG. 4C, the discharge passages 20a and 20b for connecting the discharge ports 6A and the discharge ports EA and EB of the switching valve 3 are formed by the space between the valve box 15 and the flow path member 16 as shown in FIG. Since the structure of the passage is simple and the width of the switching valve 3 can be used to the maximum, it is possible to prevent the cross-sectional area of these passages from decreasing even if the switching valve is small.

In the first embodiment, since the first seal member 28 is an O-ring, even if the supply air pressure of the supply port 5 is released, the supply air of the return chamber 45 may remain without being discharged to the outside. And the first valve body 2
7 may not release the first valve seat 25. FIG. 5 shows a first modification of the first embodiment in which this problem is solved, and a first seal member 4 provided on a valve stem 26A of the pressure control valve 1A.
6 is formed of a Y-shaped or V-shaped packing in which the first valve body 27 side is opened. The other configuration of the pressure control valve 1A is the same as that of the pressure control valve 1 described above. When the supply air pressure is acting on the supply port 5, the pressure control valve 1A
The flow path gap between the first supply passage 24a and the return chamber 45 is sealed by the lip of the first seal member 46. When the air pressure in the supply port 5 is released, the air in the return chamber 45 side becomes the first air.
Since the lip of the seal member 46 is deformed and discharged to the supply port 5, the influence of the residual pressure of the supply port P can be eliminated.

FIG. 6 shows a second modification of the first embodiment. A first valve seat 2 is provided on a valve rod 26B of the pressure control valve 1B.
5, a first valve member 27 that opens and closes the first valve member 27, a first seal member 46 that is a Y-shaped or V-shaped packing that opens on the first valve member 27 side, and a space between the second supply passage 24b and the pressure regulating piston chamber 38. O-ring for sealing the gap of the flow path of the second
Seal members 47 are fitted respectively. An inlet 48 communicating with the pressure regulating passage 23 is provided in a concave portion of the valve box 15 that communicates the second supply passage 24 b with the supply port P of the switching valve 3. Therefore, in the second modification, when the first valve body 27 opens the first valve seat 25, the compressed air of the supply port 5 is supplied to the supply port P of the switching valve 3 through the supply passages 24a and 24b. , Flows into the pressure adjusting passage 23 through the inlet 48, and the compressed air is output to the pressure adjusting piston chamber 38 and the return chamber 45. Pressure control valve 1B
Since other configurations and operations are the same as those of the pressure control valve 1A, the same reference numerals are given to the same main parts in the figure, and the description is omitted.

FIG. 7 shows a third modification of the first embodiment. In this pressure regulating valve 1C, the first supply passage 24a is located on the pressure regulating piston chamber 38 side, and the second supply passage 24b is located on the return chamber side 45. Is formed. The first valve body 27 for opening and closing the first valve seat 25 and the first supply passage 24
Only a second sealing member 47a, which is a Y-shaped or V-shaped packing and has an opening on the first valve body 27 side, which seals a flow passage gap between the pressure regulating piston chamber 38 and the pressure regulating piston chamber 38 is fitted. Therefore, in the third modified example, the first valve body 27 is connected to the first valve seat 25.
Is released, the compressed air in the supply port 5 flows into the return chamber 45 through the flow path gap on the return chamber side, and is further output to the pressure adjustment piston chamber 38 through the pressure adjustment path 23. Pressure control valve 1C
Since other configurations and operations are the same as those of the first embodiment, the same reference numerals are given to the same main parts in the drawing, and the description is omitted.

FIGS. 8 and 9 show a second embodiment of the present invention for adjusting the output air pressure of the first output port A. As shown in FIG. A first output passage 51 that communicates with the first output port 7 </ b> A communicates with the valve hole 22 through a first introduction passage 52 formed in the flow path member 16. Further, the valve stem 53 includes the first valve body 27.
And a first seal member 28 for sealing a flow path gap between the first supply passage 24a and the first introduction path 52, and a flow path gap between the second supply path 20b and the pressure regulating piston chamber 38 side. A second sealing member 54 for sealing is attached to each. Since the other configuration of the second embodiment is the same as that of the first embodiment, the same reference numerals are given to the same main parts in the drawing, and the description will be omitted. In the first embodiment and the first modification thereof, the first seal member 28 or 46 is replaced with the first valve body 2.
7, the valve stems 26 and 53 can be common.

In the second embodiment, the compressed air output from the first output port A passes through the first introduction passage 52 and passes through the valve hole 22.
Flows into the pressure adjustment piston chamber 38 through the flow path gap on the return chamber 45 side and the pressure adjustment path 23, so that the output air pressure of the first output port A acts on the pressure adjustment piston 33. . When the sum of the acting force of the output air pressure acting on the pressure adjusting piston 33 and the biasing force of the return spring 44 becomes equal to the set biasing force of the pressure regulating spring 35, the first valve body 27 closes the first valve seat 25. The air pressure at the first output port A of the switching valve 3 is adjusted to the pressure set by the pressure adjusting spring 35. In the illustrated example, since the output ports 7A and 7B are provided in the base 2, the first output passage 51 communicates with the output port A and the first output port 7A. , 7
If there is no B, the first output path 51 is connected to the first output port A
Is in communication with

FIG. 10 shows a first modified example of the second embodiment in which the effect of the residual pressure at the first output port A is eliminated. This pressure regulating valve 50A has a first valve body, like the pressure regulating valve 1A. There is provided a first seal member 46 which is a Y-shaped or V-shaped packing whose 27 side is open. The other configuration of the pressure control valve 50A is the same as that of the pressure control valve 50, and thus the description is omitted. When the supply air pressure acts on the supply port 5, the pressure regulating valve 50A seals the flow path gap between the first supply passage 24a and the first introduction path 52 with the lip of the first seal member 46. You. When the supply air pressure of the supply port 5 is released, the air of the first output port A on the return chamber 45 side is discharged to the supply port 5 by deforming the lip of the first seal member 46.
The effect of the residual pressure at the first output port A can be eliminated.

FIG. 11 shows a second modification of the second embodiment.
In the pressure control valve 50B, the first seal member 46 and the second seal member 57 attached to the valve rod 56 are both formed by Y-shaped or V-shaped packing in which the first valve body 27 side is open. The other configuration of the pressure control valve 50B is the same as that of the pressure control valve 50, and thus the description is omitted. The pressure control valve 50B is provided with a first seal member 46 and a second seal member 5
7 is a Y-shaped or V-shaped packing in which the first valve body 27 side is opened, so that the residual pressure can be discharged similarly to the pressure regulating valve 50A and the sliding resistance of the valve rod 56 can be reduced.

FIG. 12 shows a third embodiment of the present invention for adjusting the output air pressure of the second output port B. In the third embodiment, the pressure control valve 60 includes a second output port B and a second output port 7B. A second output passage 61 that communicates with the valve hole 22 is communicated with the valve hole 22 by a second introduction passage 62 formed in the flow passage member 16 (see FIG. 9). In addition, the valve stem 63 includes the first valve body 27,
A first seal member 28 for sealing a flow passage gap between the first supply passage 24a and the return chamber 45, and a second seal for sealing a flow passage gap between the second supply passage 20b and the second introduction passage 62. Members 64 are respectively attached. Since the other configuration of the third embodiment is the same as that of the first embodiment, the same reference numerals are given to the same main parts in the drawing, and the detailed description is omitted.

In the third embodiment, the compressed air output from the second output port B passes through the second introduction passage 62 to the valve hole 22.
The air flows into the pressure adjusting piston chamber 38 through the flow passage gap on the pressure adjusting unit 18 side, and flows into the pressure adjusting piston 33.
To the output fluid pressure of the second output port,
It flows into the return chamber 45 through the pressure adjustment path 23. The adjusting action of the output fluid pressure of the second output port B in the third embodiment is as follows.
Since the operation is substantially the same as the adjustment operation of the first output port A in the second embodiment, the description is omitted.

FIG. 13 shows a first modification of the third embodiment in which the effect of the residual pressure at the second output port B has been eliminated. There is provided a first seal member 46 which is a Y-shaped or V-shaped packing whose 27 side is open. The other configuration of the pressure control valve 60A is the same as that of the pressure control valve 60, and thus the description is omitted. The operation of discharging the residual pressure in the pressure control valve 60A is the same as that of the pressure control valve 1A.

FIG. 14 shows a second modification of the third embodiment.
In the pressure control valve 60B, the first seal member 46 and the second seal member 67 attached to the valve rod 66 are both formed of Y-shaped or V-shaped packing in which the first valve body 27 side is open. The other configuration of the pressure control valve 50B is the same as that of the pressure control valve 50, and thus the description is omitted. This pressure control valve 60
B can discharge the residual pressure similarly to the pressure control valve 60A, and can reduce the sliding resistance of the valve rod 66.

FIG. 15 shows another modification common to the above-described embodiments and modifications thereof, and a valve stem 70 according to this modification.
The pressure regulating piston 33 has, at its tip end, an annular contact surface 70a that contacts the end surface of the pressure regulating piston, and a protruding portion 70b that projects from the contact surface and opens and closes the second valve body 37. In this modification, when the valve stem 70 moves to the right in the figure and the projection 70b closes the second valve body 37, the annular contact surface 7
Since 0a is in contact with the end face of the pressure adjusting piston 33, it is possible to prevent the second valve body 37 from being excessively deformed due to the pressing of the valve stem.

[0031]

The switching valve pressure control valve of the present invention is provided between the base and the switching valve, but communicates the supply port and the discharge port of the base with the supply port and the discharge port of the switching valve. Since the supply passage and the discharge passage to be formed are formed by the space between the valve box and the flow path member in the valve box, the configuration of these passages is simple, and even if the switching valve is downsized, the flow path cross-sectional area is reduced. There is no decrease. Also, when the pressure regulating valve is provided with first and second output passages for communicating the first and second output ports of the switching valve with the first and second output ports of the base, the configuration of these output passages It is also simple, and there is no reduction in the flow path cross-sectional area. Further, the adjustment of the supply fluid pressure and the first and second output fluid pressures is
Since it can be performed by making slight changes to the common parts, the pressure control valve can be made inexpensive. Further, a first seal member for sealing a flow passage gap between the supply passage and the return chamber or the first output passage, and / or a second seal member for sealing a flow passage gap between the supply passage and the pressure adjustment section. Is a Y-shaped or V-shaped packing having an opening on the supply passage side, so that the influence of residual pressure of air can be eliminated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a use mode of a first embodiment.

FIG. 2 is a longitudinal sectional view of the first embodiment.

FIG. 3 is a longitudinal sectional view of a main part.

4A to 4C are AA, BB, CC of FIG.
It is sectional drawing.

FIG. 5 is a diagram of a first modification of the first embodiment.

FIG. 6 is a diagram of a second modified example.

FIG. 7 is a diagram of a third modified example of the first embodiment.

FIG. 8 is a longitudinal sectional view of the second embodiment.

FIG. 9 is a sectional view taken along line DD of FIG. 8;

FIG. 10 is a diagram of a first modification of the second embodiment.

FIG. 11 is a diagram of a second modification of the second embodiment.

FIG. 12 is a longitudinal sectional view of a main part of the third embodiment.

FIG. 13 is a diagram of a first modification of the third embodiment.

FIG. 14 is a diagram of a second modification of the third embodiment.

FIG. 15 is a diagram of another modification.

[Explanation of symbols]

1, 1A, 1B, 1C, pressure control valve 50, 50A, 50B, 60, 60A, 60B pressure control valve 2 base 3 switching valve 5 supply port 6A, 6B discharge port 7A, 7B output port 15 valve box 16 flow path member 18 Pressure regulator 19a, 19b, 51, 61 Output passage 20a, 20b Discharge passage 22 Valve hole 23 Pressure regulating passage 24a, 24b Supply passage 26, 26A, 26B, 26C Valve stem 53, 56, 63, 66, 70 Valve stem 27 first valve body 28, 46 first seal member 33 pressure adjustment piston 35 pressure adjustment spring 44 return spring 45 return chamber 47, 47a, 54, 57, 64, 67 second seal member P, A, B, EA, EB port

Claims (6)

[Claims] A base having at least a pressure fluid supply port and a discharge port; a pressure fluid supply port, first and second output ports, and a discharge port, wherein the first and second output ports are supply ports. A switching valve for switching between and communicating with the discharge port; and a pressure regulating valve for a switching valve, the pressure regulating valve comprising: a valve box; and both ends in the axial direction provided in the valve box. A flow path member having a valve hole and a pressure regulating path that opens,
A supply passage that connects the supply port to the supply port via the valve hole, a discharge passage that connects the discharge port formed between the valve box and the flow path member to the discharge port, and a flow path gap in the valve hole that can be moved. A valve stem inserted into the valve case, a pressure adjusting portion provided on one side in the axial direction of the valve box, and return means for urging the valve stem contracted in a return chamber communicating with the pressure regulating path toward the pressure adjusting portion. Wherein the valve stem comprises: a first valve body that cuts off the communication of the supply passage; and a first seal member that seals a flow passage gap between the supply passage and the return chamber. A pressure adjusting member urged toward the valve stem by an urging means capable of adjusting the urging force, wherein the acting force of the supply fluid pressure and the urging force of the return means act against the pressure regulating member. A pressure regulating valve for a switching valve, wherein the supply fluid pressure is adjusted by the sum and a set urging force of the urging means. 2. The valve system according to claim 1, wherein the valve stem includes a second seal member for sealing a flow passage gap between the supply passage and the pressure adjusting portion, instead of the first seal member. Pressure control valve described in the above. 3. A pressure regulating valve comprising: a valve box; a flow path member provided in the valve box and having a valve hole and a pressure regulating path open at both axial ends; and a supply port supplied through the valve hole. A supply passage communicating with the port, a discharge passage communicating the discharge port formed between the valve box and the flow path member with the discharge port, a first output passage opening the first output port to the valve hole, and a flow passage flowing through the valve hole. A valve stem movably inserted with a passage gap, a pressure adjusting part provided on one side in the axial direction of the valve box, and a valve stem contracted in a return chamber communicating with the pressure regulating path, facing the pressure regulating part. A first valve element for interrupting communication of the supply passage, a first seal member for sealing a flow passage gap between the supply passage and the first output passage, A second seal member for sealing a flow path gap between the supply passage and the pressure adjustment unit side, wherein the pressure adjustment unit adjusts the urging force. A pressure regulating member urged toward the valve stem by a possible urging means, wherein the force acting on the output fluid pressure of the first output port and the urging force of the return means act against the pressure regulating member. 2. The pressure control valve for a switching valve according to claim 1, wherein the output fluid pressure of the first output port is adjusted by the sum and the set urging force of the urging means. 4. A pressure regulating valve comprising: a valve box; a flow path member provided in the valve box and having a valve hole and a pressure regulating path opened at both axial ends; and a supply port supplied through the valve hole. A supply passage communicating with the port, a discharge passage communicating between a discharge port formed between the valve box and the flow path member and the discharge port, a second output passage opening the second output port to the valve hole, and a flow passage flowing through the valve hole. A valve stem movably inserted with a passage gap, a pressure adjusting part provided on one side in the axial direction of the valve box, and a valve stem contracted in a return chamber communicating with the pressure regulating path, facing the pressure regulating part. A return valve for urging the valve, wherein the valve stem is configured to pass through the supply passage, a first seal member sealing a flow path gap between the supply passage and the return chamber, and a supply passage. A second sealing member for sealing a flow path gap between the second output passage and the second output passage; A pressure adjusting member urged toward the valve stem by the step; a sum of the acting force of the output fluid pressure of the second output port and the urging force of the return means, acting against the pressure regulating member; 2. The pressure control valve for a switching valve according to claim 1, wherein the output fluid pressure of the second output port is adjusted by the setting urging force of the urging means. 5. The switching valve according to claim 1, wherein the first sealing member is a Y-shaped or V-shaped packing having an opening on the supply passage side. Pressure regulating valve. 6. The pressure regulating valve for a switching valve according to claim 2, wherein the second sealing member is a Y-shaped or V-shaped packing having an opening on the supply passage side.