JP2013036514A - Pilot type solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a valve body from becoming large in the width direction, for securing a flow rate of pressure fluid flowing between respective ports through a valve hole.SOLUTION: The valve body 11 is formed with a one end side sliding hole 18a and an other end side sliding hole 20a through which a one end side seal valve part 19a and an other end side seal valve part 19b slide, and hole diameters of the one end side sliding hole 18a and the other end side sliding hole 20a are made smaller than a hole diameter of the valve hole 18. Further, on sides of the one end side sliding hole 18a and the other end side sliding hole 20a along the width direction of the valve body 11, insertion holes 12a, 20g are formed through which respective attaching screws 25, 26 can penetrate.

Description

  The present invention relates to a pilot-type solenoid valve.

  As a type of pilot-type solenoid valve, for example, one disclosed in Patent Document 1 is known. As shown in FIG. 5, the pilot-type solenoid valve 50 of Patent Document 1 includes a main valve 51 assembled with a solenoid-driven pilot valve 52. A plurality of pilot-type solenoid valves 50 are used in series on a manifold base (not shown). The valve body 53 of the main valve 51 is installed on the manifold base. The valve body 53 includes a pressure fluid supply port, a pair of output ports, a pair of discharge ports, a pilot supply port and a pilot discharge port (none of which are shown), and these ports are open and the shaft of the valve body 53 is opened. A valve hole 54 extending in the direction is formed. A rod-like valve body 55 extending along the axial direction of the valve hole 54 is slidably inserted into the valve hole 54. The valve body 55 is formed with a plurality of valve portions 55 a that are separated from each other in the axial direction of the valve body 55. The diameter of each valve portion 55a is the same. A packing 551a that seals between the valve hole 54 is mounted on the outer peripheral surface of each valve portion 55a.

  In the valve body 53, a bulging portion 60 that bulges in a width direction (arrow X <b> 1 shown in FIG. 5) orthogonal to the axial direction of the valve body 53 is formed on the side surface facing the adjacent pilot-type solenoid valve 50. , 61 are formed. The bulging portions 60 and 61 are formed with mounting screw insertion holes 60a and 61a through which mounting screws (not shown) for mounting the manifold base and the valve body 53 can be inserted.

  A piston box 56 is attached to one end face of the valve body 53, and an end plate 57 is attached to the other end face. A cylinder chamber 56a is formed in a space defined by the piston box 56 and one end face of the valve body 53, and a drive piston 58 is slidably accommodated in the cylinder chamber 56a. A return chamber 57a is formed in a space defined by the end plate 57 and the other end face of the valve body 53, and a return piston 59 is slidably accommodated in the return chamber 57a. A pilot valve 52 is attached to the piston box 56. The pilot valve 52 is formed with a pilot output port, a pilot supply port, and a pilot discharge port (all not shown). The pilot output port communicates with the cylinder chamber 56a.

  When a solenoid (not shown) of the pilot valve 52 is excited, pilot fluid is supplied from the pilot output port to the cylinder chamber 56a, and the valve body 55 moves in one direction, so that one of the supply port, the output port, and the output port And the other of the discharge ports communicate with each other. When the solenoid is de-energized, the pilot fluid in the cylinder chamber 56a is discharged from the pilot discharge port, so that the valve body 55 moves in the other direction, and the other of the supply port, the output port, one of the output ports, and the discharge port. One side communicates.

Japanese Utility Model Publication No. 7-41165

  By the way, in the pilot-type solenoid valve 50 as in Patent Document 1, the diameters of the valve portions 55a and the valve holes 54 are increased in order to ensure the flow rate of the pressure fluid flowing between the ports via the valve holes 54. There is a tendency. However, when the diameters of the valve portions 55a and the valve holes 54 are increased, the attachment screw insertion holes 60a and 60b are formed so as to avoid the valve hole 54. Therefore, as in Patent Document 1, the attachment screw insertion holes 60a and 60b are formed. The bulging portions 60 and 61 for forming the valve body 53 must be formed, and the valve body 53 is enlarged in the width direction.

  The present invention provides a pilot-type solenoid valve capable of preventing the valve body from becoming large in the width direction in order to ensure the flow rate of the pressure fluid flowing between the ports via the valve holes. is there.

  In order to achieve the above object, according to the first aspect of the present invention, a valve body having a plurality of ports through which pressure fluid is supplied and discharged is provided with a valve hole extending in the axial direction, and the valve body is provided in the valve hole. Is accommodated in a reciprocating manner by a pilot fluid supplied from a pilot valve, and the valve body is separated from each other in the axial direction and a plurality of valve portions for switching communication between the ports are slidable with respect to the valve hole A pilot-type solenoid valve in which the valve body is mounted on a manifold base by a mounting member, and in the valve body, a sliding hole is provided axially outside the valve hole, The diameter of the sliding hole is smaller than the diameter of the valve hole. The sliding hole slides on the valve body, and between the valve hole and the outer side in the axial direction than the sliding hole. The A sealing valve portion is provided, and the diameter of the sealing valve portion is smaller than the diameter of each valve portion. In the valve body, the sliding hole along the width direction orthogonal to the axial direction of the valve body is provided. The gist is that an insertion hole through which the mounting member can be inserted is formed on the side.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first valve portion of the plurality of valve portions is seated in the valve hole when the valve body moves to the most end side. And a second valve seat on which a second valve portion of the plurality of valve portions is seated when the valve body moves to the other end side. And

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the valve body has a hole diameter larger than the diameter of each valve portion and the valve body can be inserted into the valve hole. An essential opening is provided, and the valve body has a press-fitting part that is press-fitted into the opening.

  According to this invention, in order to ensure the flow volume of the pressure fluid which flows between each port via a valve hole, it can prevent that a valve main body enlarges in the width direction.

The fragmentary sectional view which shows the pilot type solenoid valve in embodiment. The fragmentary sectional view of a pilot type solenoid valve. (A) is a fragmentary sectional view which shows the state which the spool valve moved to the other end side, (b) is a fragmentary sectional view which shows the state which the spool valve moved to the one end side. The fragmentary sectional view which shows a part of pilot type solenoid valve in another embodiment. The fragmentary sectional view which shows the pilot type solenoid valve in a prior art example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the valve main body 11 of the pilot type solenoid valve 10 is mounted on the manifold base B. A first pilot valve 31 and a second pilot valve 32 as pilot valves are attached to both ends of the valve body 11. The first pilot valve 31 and the second pilot valve 32 incorporate an electromagnetic drive unit (not shown) that drives the first pilot valve 31 and the second pilot valve 32 in order to control positive pressure air as a pilot fluid. Has been. The electromagnetic drive unit includes a solenoid coil and various electronic components necessary for energizing the solenoid coil.

  The valve body 12 of the valve body 11 is formed in a substantially cylindrical shape. The valve body 12 includes a first exhaust port 13, a first output port 14, an air supply port 15, a second output port 16, and a second exhaust port 17 extending from one end side to the other end side in the axial direction of the valve body 12. Formed in order. A valve hole 18 extending in the axial direction is formed in the valve body 12, and a spool valve 19 as a valve body is accommodated in the valve hole 18 so as to be reciprocally movable. Each port 13, 14, 15, 16, 17 communicates with the valve hole 18.

  The spool valve 19 includes first to fourth valve portions 19c, 19d, 19a, 19d, 19c, 19d, which are separated from each other in the axial direction and switch a flow path of compressed air as pressure fluid flowing between the ports 13, 14, 15, 16, and 17. 19e and 19f are formed. Further, in the spool valve 19, the one end side seal valve portion 19a as the seal valve portion is formed at the most one end side in the axial direction, and the other end side seal valve as the seal valve portion is formed at the other end side. A portion 19b is formed. The first valve portion 19c is located next to the one end side seal valve portion 19a, and the second valve portion 19d is located next to the other end side seal valve portion 19b. The third valve portion 19e is located between the first valve portion 19c and the second valve portion 19d and next to the first valve portion 19c, and the fourth valve portion 19f is the first valve portion 19c. Between the first valve portion 19d and the second valve portion 19d.

  The diameter of each valve portion 19a, 19b, 19c, 19d, 19e, 19f is set larger than the diameter of the shaft portion 191 of the spool valve 19. The diameters of the one end side seal valve portion 19a and the other end side seal valve portion 19b are smaller than the diameters of the first to fourth valve portions 19c, 19d, 19e, and 19f. The first to fourth valve portions 19c, 19d, 19e, 19f all have the same diameter. Packing 191a, 191b, 191c, 191d, 191e, 191f is mounted on the outer peripheral surface of each valve portion 19a, 19b, 19c, 19d, 19e, 19f.

  In the valve body 12, one end side sliding hole 18 a as a sliding hole through which the one end side seal valve portion 19 a slides is formed at one end side from the valve hole 18. One end side of the one end side sliding hole 18 a is opened from one end surface of the valve body 12, and the other end side communicates with the valve hole 18. Further, on the inner peripheral surface of the valve hole 18 on the one end side of the first exhaust port 13, the first valve seat 18b on which the first valve portion 19c is seated when the spool valve 19 is moved to the most end side is one end. It is formed so as to continue to the side sliding hole 18a. The hole diameter of the first valve seat 18b is larger than the hole diameter of the one end side sliding hole 18a. Further, a third valve seat 18c is formed on the inner peripheral surface of the valve hole 18 between the first exhaust port 13 and the first output port 14, and the first output port 14 and the air supply port in the valve hole 18 are also formed. A fourth valve seat 18 d is formed on the inner peripheral surface between the second valve seat 18 and the inner peripheral surface 15. A fifth valve seat 18e is formed on the inner peripheral surface of the valve hole 18 between the air supply port 15 and the second output port 16, and the second output port 16 and the second exhaust port in the valve hole 18 are formed. A sixth valve seat 18 f is formed on the inner peripheral surface between the first valve seat 17 and the inner valve 17. The hole diameters of the third to sixth valve seats 18c, 18d, 18e, and 18f are the same as the hole diameter of the first valve seat 18b.

  At the other end of the valve hole 18, an opening 18g having a hole diameter larger than the diameters of the first to fourth valve parts 19c, 19d, 19e, 19f is formed. Therefore, the spool valve 19 can be inserted into the valve hole 18 through the opening 18g from the one end side seal valve portion 19a side.

  A thin plate-like press-fitting member 20 constituting a part of the valve body 11 is attached to the other end side of the valve body 12. The press-fitting member 20 has a main body 20 h that extends linearly in the thickness direction (vertical direction) of the valve body 12. The length in the width direction (direction of arrow Y1 shown in FIG. 2) orthogonal to the axial direction of the valve body 12 is the same as the length in the width direction of the main body portion 20h. The main body portion 20h is formed with the other end side sliding hole 20a as a sliding hole through which the other end side seal valve portion 19b of the spool valve 19 slides. The other end side sliding hole 20 a is formed on the other end side from the valve hole 18. One end side of the other end side sliding hole 20 a communicates with the valve hole 18, and the other end side is opened from the other end surface of the press-fitting member 20. The other end side sliding hole 20a has the same hole diameter as the one end side sliding hole 18a, and is smaller than the hole diameters of the first and third to sixth valve seats 18b, 18c, 18d, 18e, and 18f.

  The main body portion 20h is formed with an annular press-fit portion 20b extending in the axial direction from around the other end side sliding hole 20a. The press-fitting portion 20b is press-fitted inside the opening 18g of the valve hole 18, and the press-fitting member 20 is integrated with the valve body 12 by press-fitting the opening 18g in the press-fitting portion 20b. At this time, the main body portion 20 h of the press-fitting member 20 is supported by a support portion 12 c that is formed to protrude from the other end surface of the valve body 12. A seal member 20c is disposed between the press-fit portion 20b and the opening 18g of the valve hole 18, and a state between the press-fit portion 20b and the opening 18g of the valve hole 18 is sealed by the seal member 20c. It is sealed with.

  A second valve seat 20e on which the second valve portion 19d is seated when the spool valve 19 moves to the other end side is formed on the inner peripheral surface of the press-fit portion 20b. The hole diameter of the second valve seat 20e is larger than the hole diameter of the other end side sliding hole 20a, and is the same as the hole diameters of the first and third to sixth valve seats 18b, 18c, 18d, 18e, and 18f. ing. The second valve seat 20 e is located on the other end side with respect to the second exhaust port 17.

  A rectangular box-shaped first piston chamber forming body 21 is connected to one end face of the valve body 12, and a rectangular box-shaped second piston chamber forming body 22 is connected to the other end face of the press-fitting member 20. The first piston chamber forming body 21 and the second piston chamber forming body 22 constitute a part of the valve body 11. Between the one end surface of the valve body 12 and the first piston chamber forming body 21, a first piston chamber 21a is formed which is positioned on the axially outer side (one end side) than the one end side sliding hole 18a. The 1st piston 21b is accommodated in the 1 piston chamber 21a so that a movement is possible. Between the other end surface of the press-fitting member 20 and the second piston chamber forming body 22, a second piston chamber 22a is formed which is positioned on the outer side in the axial direction (the other end side) than the other end side sliding hole 20a. The second piston 22b is movably accommodated in the second piston chamber 22a.

  The first piston chamber forming body 21 is formed with a first output passage 21c having one end communicating with a first output hole (not shown) of the first pilot valve 31, and the other end of the first output passage 21c is It opens in the site | part facing the 1st pilot valve 31 side of the 1st piston 21b in the inner surface of the 1st piston chamber 21a. Then, when positive pressure air is supplied into the first piston chamber 21a through the first output hole and the first output passage 21c, the first piston 21b moves to the other end side, and the one end surface of the spool valve 19 is moved. It moves to the other end side integrally with the spool valve 19 while pressing. The first piston chamber forming body 21 is provided with a first air supply passage (not shown) whose one end communicates with a first supply hole (not shown) of the first pilot valve 31. Positive pressure air is supplied to the other end of the one air supply passage from a positive pressure supply device (not shown). Further, the first piston chamber forming body 21 is formed with a first exhaust passage (not shown) having one end communicating with a first exhaust hole (not shown) of the first pilot valve 31 and a first exhaust. An exhaust pipe (not shown) is connected to the other end of the passage.

  The second piston chamber forming body 22 is formed with a second output passage 22c having one end communicating with a second output hole (not shown) of the second pilot valve 32, and the other end of the second output passage 22c is It opens in the site | part facing the 2nd pilot valve 32 side of the 2nd piston 22b in the inner surface of the 2nd piston chamber 22a. When positive pressure air is supplied into the second piston chamber 22a through the second output hole and the second output passage 22c, the second piston 22b moves to one end side and presses the other end surface of the spool valve 19. However, it moves to one end side integrally with the spool valve 19. The second piston chamber forming body 22 is provided with a second air supply passage (not shown) whose one end communicates with a second supply hole (not shown) of the second pilot valve 32. Positive pressure air is supplied to the other end of the two air supply passages from a positive pressure supply device (not shown). The second piston chamber forming body 22 is formed with a second exhaust passage (not shown) whose one end communicates with a second exhaust hole (not shown) of the second pilot valve 32, and the second exhaust. An exhaust pipe (not shown) is connected to the other end of the passage.

  As shown in FIG. 2, in the valve body 12, a circular insertion hole 12a is formed on the side of the one end side sliding hole 18a (one end side seal valve portion 19a) along the width direction. . The insertion hole 12 a is formed so as to extend linearly in the thickness direction of the valve body 12. An attachment screw 25 as an attachment member can be inserted into the insertion hole 12a.

  In the press-fitting member 20, a circular insertion hole 20 g is formed on the side of the other end side sliding hole 20 a (the other end side seal valve portion 19 b) along the width direction of the valve body 12. . The insertion hole 20g is formed to extend linearly in the thickness direction of the press-fitting member 20. Furthermore, as shown in FIG. 1, a circular insertion hole 12 b is formed in the support portion 12 c of the valve body 12. The insertion hole 12 b is formed so as to extend linearly in the thickness direction of the valve body 12. The insertion hole 12b of the valve body 12 and the insertion hole 20g of the press-fitting member 20 communicate with each other and have the same diameter. As shown in FIG. 2, an attachment screw 26 as an attachment member can be inserted into the insertion hole 20 g of the press-fitting member 20 and the insertion hole 12 b of the valve body 12.

  As shown in FIG. 1, a female screw hole 12 e is formed in the support portion 12 c of the valve body 12. As shown with a broken line in FIG. 2, the female screw hole 12e is formed in the center part of the support part 12c. An anti-rotation screw 12f is screwed into the female screw hole 12e. The front end surface 121f of the anti-rotation screw 12f is formed into a flat surface, and the front end surface 121f is in contact with the lower surface of the main body portion 20h.

  Then, the mounting screw 25 is inserted into the insertion hole 12a, and the mounting screw 25 is screwed into a female screw hole (not shown) formed in the manifold base B. Further, the mounting screw 26 is inserted into the insertion hole 20 g of the press-fitting member 20 and the insertion hole 12 b of the valve body 12, and the mounting screw 26 is screwed into a female screw hole (not shown) formed in the manifold base B. At this time, since the front end surface 121f of the anti-rotation screw 12f is in contact with the lower surface of the main body portion 20h, the press-fitting member 20 is inclined when the mounting screw 26 is screwed into the female screw hole of the manifold base B. Is prevented. The valve body 12 is mounted on the manifold base B by screwing the mounting screws 25 and 26 into the female screw holes of the manifold base B.

Next, the operation of this embodiment will be described.
As shown in FIG. 3A, when positive pressure air is supplied to the first piston chamber 21a via the first output hole of the first pilot valve 31 and the first output passage 21c, the first piston 21b It moves to the other end side integrally with the spool valve 19 while moving to the end side and pressing one end surface of the spool valve 19. Then, the first valve portion 19c is seated on the third valve seat 18c, the space between the first valve portion 19c (packing 191c) and the third valve seat 18c is sealed, and the third valve portion 19e is It is located between the valve seat 18d and the fifth valve seat 18e. Further, the fourth valve portion 19f is seated on the fifth valve seat 18e, and the space between the fourth valve portion 19f (packing 191f) and the fifth valve seat 18e is sealed. 3A, the second valve portion 19d is seated on the second valve seat 20e, and a seal is provided between the second valve portion 19d (packing 191d) and the second valve seat 20e. Is done. Thus, the first output port 14 and the air supply port 15 and the second output port 16 and the second exhaust port 17 are communicated with each other.

  As shown in FIG. 3B, after the supply of the positive pressure air to the first piston chamber 21a via the first output hole of the first pilot valve 31 and the first output passage 21c is stopped, the second pilot Positive pressure air is supplied to the second piston chamber 22a through the second output hole of the valve 32 and the second output passage 22c. Then, the second piston 22b moves to one end side and moves to one end side integrally with the spool valve 19 while pressing the other end surface of the spool valve 19. Then, the second valve portion 19d is detached from the second valve seat 20e and seated on the sixth valve seat 18f, and the space between the second valve portion 19d (packing 191d) and the sixth valve seat 18f is sealed. The fourth valve portion 19f is separated from the fifth valve seat 18e and is positioned between the fourth valve seat 18d and the fifth valve seat 18e. Further, the third valve portion 19e is seated on the fourth valve seat 18d, and the space between the third valve portion 19e (packing 191e) and the fourth valve seat 18d is sealed. 3B, the first valve portion 19c is detached from the third valve seat 18c and is seated on the first valve seat 18b, and the first valve portion 19c (packing 191c) and The space between the first valve seat 18b is sealed. As a result, the first exhaust port 13 and the first output port 14 and the air supply port 15 and the second output port 16 communicate with each other.

  The hole diameter of each valve seat 18b, 18c, 18d, 18e of the valve hole 18 in which the first to fourth valve portions 19c, 19d, 19e, 19f slide is set to an upper limit value that can be formed in the valve body 12. Therefore, when the first to fourth valve portions 19c, 19d, 19e, 19f are separated from the valve seats 18b, 18c, 18d, 18e, the ports 13, 14, 15, 16, 17 through the valve holes 18 are used. It is possible to secure a flow path area of the compressed air flowing between them.

In the above embodiment, the following effects can be obtained.
(1) One end side sliding hole 18a and the other end side sliding hole 20a in which the one end side seal valve portion 19a and the other end side seal valve portion 19b slide are formed in the valve body 11, and one end side sliding is performed. The hole diameters of the hole 18 a and the other end side sliding hole 20 a were made smaller than the hole diameter of the valve hole 18. And the insertion holes 12a, 12b, and 20g which can insert each attachment screw 25 and 26 can be formed in the side of the one end side sliding hole 18a and the other end side sliding hole 20a along the width direction of the valve main body 11. A width of just minutes was secured. Therefore, unlike the prior art, it is not necessary to form the bulging portions 60 and 61 in the valve body 11 in order to secure the width for forming the insertion holes of the mounting screws 25 and 26. In order to ensure the flow rate of the compressed air flowing between the respective ports 13, 14, 15, 16 and 17, it is possible to prevent the valve body 11 from being enlarged in the width direction.

  (2) When the spool valve 19 is moved to the one end side in the valve hole 18, the first valve seat 18 b on which the first valve portion 19 c is seated is provided, and the spool valve 19 is moved to the other end side. The second valve seat 20e on which the second valve portion 19d is seated is provided. For example, when the spool valve 19 moves to the other end side, the compressed air flowing between the second output port 16 and the second exhaust port 17 via the valve hole 18 is caused by the second valve portion 19d. Leakage to the 22a side is prevented. Further, the fourth valve portion 19 f prevents the compressed air flowing between the second output port 16 and the second exhaust port 17 through the valve hole 18 from leaking to one end side of the valve hole 18. Accordingly, since the second valve portion 19d and the fourth valve portion 19f are formed with the same diameter, the pressure receiving area of the second valve portion 19d with respect to the pressure in the valve hole 18 and the fourth valve with respect to the pressure in the valve hole 18 It is possible to prevent the spool valve 19 from malfunctioning due to the difference in pressure receiving area of the portion 19f due to the difference in pressure receiving area. In addition, also when the spool valve 19 moves to one end side, the same effect as when the spool valve 19 moves to the other end side can be obtained.

  (3) At the other end of the valve hole 18, an opening 18g having a hole diameter larger than the diameters of the first to fourth valve portions 19c, 19d, 19e, 19f is formed, and the spool valve 19 is connected to the one end side seal valve portion. It inserted into the valve hole 18 from the 19a side through the opening part 18g. Then, the press-fitting portion 20b of the press-fitting member 20 was press-fitted into the opening 18g. Therefore, the spool valve 19 in which the valve portions 19a, 19b, 19c, 19d, 19e, and 19f having different diameters are formed can be easily inserted into the valve hole 18 through the opening 18g. It can be easily closed by the press-fit portion 20b.

  (4) The diameters of the one end side seal valve portion 19a and the other end side seal valve portion 19b are made smaller than the diameters of the first to fourth valve portions 19c, 19d, 19e, and 19f. Therefore, for example, one end side seal valve part 19a and the other end side seal valve part 19b have one end side seal valve part compared to the case where the diameters of the first to fourth valve parts 19c, 19d, 19e, and 19f are the same. The sliding resistance with respect to the one end side sliding hole 18a and the other end side sliding hole 20a of 19a (packing 191a) and the other end side seal valve portion 19b (packing 191b) can be reduced. As a result, the spool valve 19 can be moved smoothly, and the responsiveness of the spool valve 19 can be improved.

  (5) The seal member 20c is disposed between the press-fit portion 20b and the opening 18g. Therefore, it can seal in the state sealed between the press-fit part 20b and the opening part 18g by the sealing member 20c.

In addition, you may change the said embodiment as follows.
In the embodiment, the press-fitting member 20 is formed of the main body portion 20h and the annular press-fit portion 20b extending along the axial direction from the other end side sliding hole 20a of the main body portion 20h. Alternatively, the main body 20h may be deleted. For example, as shown in FIG. 4, a press-fitting member 41 is press-fitted into the opening 18g. The press-fitting member 41 is formed with the other end side sliding hole 41a as a sliding hole through which the other end side seal valve portion 19b of the spool valve 19 slides. Further, the press-fitting member 41 is formed with an annular press-fit portion 41b extending in the axial direction from around the other end side sliding hole 41a. A second valve seat 20e on which the second valve portion 19d is seated when the second valve portion 19d moves to the other end side is formed on the inner peripheral surface of the press-fit portion 41b. The press-fitting portion 41b is press-fitted inside the opening 18g of the valve hole 18, and the press-fitting member 41 is integrated with the valve body 12 by press-fitting the opening 18g in the press-fitting portion 41b. A seal member 20 c is disposed between the press-fit portion 41 b and the opening 18 g of the valve hole 18. A rectangular box-shaped second piston chamber forming body 22 is connected to the other end surface of the valve body 12.

In the embodiment, the first valve seat 18b and the second valve seat 20e may be deleted.
In the embodiment, the hole diameter of the opening portion 18g of the valve hole 18 is formed larger than the diameter of each valve portion 19c, 19d, 19e, 19f, and the spool valve 19 is opened from the one end side seal valve portion 19a side to the opening portion 18g. However, the present invention is not limited to this. For example, the diameter of the opening on one end side of the valve hole 18 is formed larger than the diameter of each valve portion 19c, 19d, 19e, 19f, and the spool valve 19 is connected to the valve hole 18 from the other end side seal valve portion 19b side. You may insert in the valve hole 18 through the opening part of one end side.

  In the embodiment, the first pilot valve 31 or the second pilot valve 32 may be deleted.

  B ... Manifold base, 10 ... Pilot type solenoid valve, 11 ... Valve body, 12a, 12b, 20g ... Insertion hole, 13 ... First exhaust port, 14 ... First output port, 15 ... Air supply port, 16 ... Second Output port, 17 ... second exhaust port, 18 ... valve hole, 18a ... one end side sliding hole as a sliding hole, 18b ... first valve seat, 18g ... opening, 19 ... spool valve as valve body, 19a ... one end side sealing valve part as a sealing valve part, 19b ... other end side sealing valve part as a sealing valve part, 19c ... first valve part, 19d ... second valve part, 19e ... third valve part, 19f ... first 4 valve parts, 20a, 41a ... the other end side sliding hole as a sliding hole, 20b, 41b ... press-fitting part, 20e ... second valve seat, 25, 26 ... mounting screw as mounting member, 31 ... pilot valve 1st pilot valve, 32 ... as pilot valve The second pilot valve.

Claims (3)

A valve body extending in the axial direction is provided in a valve body having a plurality of ports through which pressure fluid is supplied and discharged, and a valve body is accommodated in the valve hole so as to be capable of reciprocating by a pilot fluid supplied from a pilot valve, The valve body is provided with a plurality of valve portions that are separated from each other in the axial direction and switch communication between the ports so as to be slidable with respect to the valve hole, and the valve body is mounted on the manifold base by a mounting member. A pilot type solenoid valve to be attached,
In the valve body, a sliding hole is provided on the axially outer side than the valve hole, and a hole diameter of the sliding hole is smaller than a hole diameter of the valve hole,
The valve body is provided with a seal valve portion that slides between the slide hole and seals between the valve hole and the outer side in the axial direction than the slide hole. It is smaller than the diameter of the part,
The pilot-type solenoid valve, wherein an insertion hole into which the attachment member can be inserted is formed on a side of the sliding hole along a width direction orthogonal to the axial direction of the valve body.   The valve hole is provided with a first valve seat on which the first valve portion of the plurality of valve portions is seated when the valve body moves to the most end side, and the valve body is located on the other end side. 2. The pilot-type solenoid valve according to claim 1, further comprising a second valve seat on which a second valve portion of the plurality of valve portions is seated when moved to the position. The valve main body has a hole diameter larger than the diameter of each valve portion and an opening through which the valve body can be inserted into the valve hole.
The pilot-type solenoid valve according to claim 1 or 2, wherein the valve body has a press-fitting portion that is press-fitted into the opening.

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