Valves for fluid pressure equipment

Abstract

A valve for a fluid pressure device comprises a housing, a first valve body, a second valve body, a valve seat forming body, a first force spring, a second force spring, a manual shaft and an operating member. The manual shaft comprises a first shaft portion, a second shaft portion, a storage recess and a through hole. An insertion member is provided in the housing. The operating member is stored in the storage recess. The operating member comprises: a non-locking hole, which allows the manual shaft to move relative to the housing and restricts the operating member from rotating in the storage recess with the axis of the operating member as the rotation center when the insertion member is inserted into the non-locking hole; and a locking hole, which allows the manual shaft to move relative to the housing when the insertion member is inserted into the locking hole and allows the operating member to rotate in the storage recess with the axis of the operating member as the rotation center after the manual shaft is moved to a position where the first valve body and the second valve body are respectively in the valve-opening state, and restricts the movement of the manual shaft relative to the housing after the operating member rotates.

Description

Technical Field

[0001] The present invention relates to a valve for fluid pressure equipment. Background Art

[0002] As a valve for a fluid pressure device, a valve disclosed in Japanese Utility Model Publication No. 6-28433 is known. Such a valve for a fluid pressure device is sometimes used, for example, to discharge the fluid remaining in the fluid pressure device to the outside. For example, in order to maintain the fluid output to the two cylinder chambers of the fluid pressure device so that the position of the piston of the fluid pressure device stops at the middle position, a pilot-operated check valve disclosed in Japanese Patent Publication No. 7-293511 is used. In this case, for example, during maintenance, it is necessary to discharge the fluid in each cylinder chamber maintained by the pilot-operated check valve to the outside.

[0003] Therefore, the housing of the valve for fluid pressure equipment has a first inlet, a second inlet, a discharge port, a first valve chamber, and a second valve chamber. The first valve body is accommodated in the first valve chamber. The second valve body is accommodated in the second valve chamber. In addition, the valve for fluid pressure equipment has a valve seat forming body. The valve seat forming body has a first valve hole, a second valve hole, a first valve seat, and a second valve seat. The first valve hole is connected to the first valve chamber. The second valve hole is connected to the second valve chamber. The first valve seat is formed around the first valve hole, and the first valve body contacts or separates from the first valve seat. The second valve seat is formed around the second valve hole, and the second valve body contacts or separates from the second valve seat. In addition, the valve for fluid pressure equipment has a first force spring and a second force spring. The first force spring applies force to the first valve body toward the first valve seat. The second force spring applies force to the second valve body toward the second valve seat.

[0004] The valve for fluid pressure equipment is provided with a manual shaft. The manual shaft is movable relative to the housing. The manual shaft has a first shaft portion and a second shaft portion. The first shaft portion presses the first valve body in a direction away from the first valve seat against the force of the first force spring, thereby putting the first valve body into an open valve state. The second shaft portion presses the second valve body in a direction away from the second valve seat against the force of the second force spring, thereby putting the second valve body into an open valve state.

[0005] Furthermore, when discharging the fluid in each cylinder chamber held by the pilot-operated check valve to the outside, the manual shaft is moved relative to the housing until the first shaft portion presses the first valve body and the first valve body is in the valve-opening state, and the second shaft portion presses the second valve body and the second valve body is in the valve-opening state. Thus, for example, the fluid in one of the two cylinder chambers is discharged to the outside from the discharge port through the first inlet, the first valve chamber, and the first valve hole, and the fluid in the other of the two cylinder chambers is discharged to the outside from the discharge port through the second inlet, the second valve chamber, and the second valve hole.

[0006] In this type of valve for fluid pressure equipment, it is desirable to maintain the position of the manual shaft after the manual shaft is moved relative to the housing to positions where the first valve body and the second valve body are respectively in the valve-opening state. However, when the valve for fluid pressure equipment is made into a locking specification that can maintain the position of the manual shaft after the manual shaft is moved relative to the housing to positions where the first valve body and the second valve body are respectively in the valve-opening state, there is a concern that the position of the manual shaft may not be maintained intentionally even when it is not necessary to maintain the position of the manual shaft. Therefore, it is also desirable to use the valve for fluid pressure equipment as a non-locking specification that does not maintain the position of the manual shaft even if the manual shaft is moved relative to the housing to positions where the first valve body and the second valve body are respectively in the valve-opening state. Thus, it is desirable to be able to easily separate and use the valve for fluid pressure equipment as a locking specification and a non-locking specification. Summary of the invention

[0007] A valve for a fluid pressure device that solves the above-mentioned problems, a housing having a first inlet, a second inlet, a discharge port, a first valve chamber, and a second valve chamber; a first valve body housed in the first valve chamber; a second valve body housed in the second valve chamber; a valve seat forming body having a first valve hole communicating with the first valve chamber, a second valve hole communicating with the second valve chamber, a first valve seat formed around the first valve hole and in contact with or separated from the first valve body, and a second valve seat formed around the second valve hole and in contact with or separated from the second valve body; a first biasing spring , which applies force to the first valve body toward the first valve seat; a second force spring, which applies force to the second valve body toward the second valve seat; and a manual shaft, which has: a first shaft portion, which presses the first valve body in a direction away from the first valve seat against the force of the first force spring, so that the first valve body is in a valve-opening state; and a second shaft portion, which presses the second valve body in a direction away from the second valve seat against the force of the second force spring, so that the second valve body is in a valve-opening state, and the manual shaft is movable relative to the housing. The valve for fluid pressure equipment further includes a cylindrical operating member integrally provided with the manual shaft. The manual shaft has: a circular hole-shaped receiving recess, in which the operating member is received; and an insertion hole, which is connected to the inner side of the receiving recess and extends in the moving direction of the manual shaft relative to the housing. An insertion member is provided in the housing, and the insertion member protrudes toward the inner side of the receiving recess via the insertion hole. The operating member is housed in the housing recess in a state where the axial direction of the operating member is consistent with the moving direction of the manual shaft relative to the housing. The operating member has: a non-locking hole, which allows the manual shaft to move relative to the housing and restricts the operating member from rotating around the axis of the operating member in the housing recess when the insertion member is inserted into the non-locking hole; and a locking hole, which allows the manual shaft to move relative to the housing when the insertion member is inserted into the locking hole and allows the operating member to rotate around the axis of the operating member in the housing recess after the manual shaft is moved to a position where the first valve body and the second valve body are respectively in the valve-opening state, and restricts the movement of the manual shaft relative to the housing after the operating member rotates.

[0008] Preferably, in the above-mentioned valve for fluid pressure equipment, the manual shaft has a main body portion which is an oblong shape when viewed from above, the storage recess is formed in the main body portion, and the first shaft portion and the second shaft portion protrude from the main body portion in a state of being arranged side by side in the direction in which the long axis of the main body portion extends.

[0009] Preferably, in the above-mentioned valve for fluid pressure equipment, a third force spring is arranged between the main body and the valve seat forming body, and the third force spring applies force to the manual shaft in the direction of separation of the first shaft portion relative to the first valve body and in the direction of separation of the second shaft portion relative to the second valve body.

[0010] Preferably, in the above-mentioned valve for fluid pressure equipment, the valve seat forming body has a locking piece, and the locking piece is locked to the discharge port.

[0011] Preferably, in the above-mentioned valve for fluid pressure equipment, an operating portion is provided on the first end face of the operating member, which is used to rotate the operating member in the storage recess around the axis of the operating member, and a conical recess is formed in the central part of the second end face of the operating member.

[0012] Preferably, in the above-mentioned valve for fluid pressure equipment, the operating portion is a slit groove formed on the first end surface of the operating member.

[0013] Preferably, in the above-mentioned valve for fluid pressure equipment, the shell has a storage hole for accommodating the valve seat forming body, and the shell has an operating opening portion, which extends from the opening edge of the storage hole toward the moving direction of the manual shaft relative to the shell and is connected to the interior of the storage hole.

[0014] Preferably, in the above-mentioned valve for fluid pressure equipment, the valve for fluid pressure equipment is integrated with a pilot-operated one-way valve which maintains fluid output to two cylinder chambers of the fluid pressure equipment respectively so that the piston of the fluid pressure equipment stops at an intermediate position.

[0015] Effects of the Invention

[0016] According to the present invention, it is possible to provide a fluid pressure equipment valve that can be easily used in a locking specification and a non-locking specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a diagram schematically showing the structure of a solenoid valve manifold equipped with a valve for a fluid pressure device in an embodiment.

[0018] Figure 2 It is a cross-sectional view showing a pilot-operated check valve and a valve for a fluid pressure device.

[0019] Figure 3 It is a cross-sectional view showing a pilot-operated check valve and a valve for a fluid pressure device.

[0020] Figure 4 This is an exploded perspective view of a valve for fluid pressure equipment.

[0021] Figure 5 This is a cross-sectional view of a valve for fluid pressure equipment.

[0022] Figure 6 This is a cross-sectional view of a valve for fluid pressure equipment.

[0023] Figure 7 This is a perspective view of the operating member as viewed from the first end surface side.

[0024] Figure 8 This is a perspective view of the operating member as viewed from the second end surface side.

[0025] FIG. 9( a ) is a plan view of the valve for fluid pressure equipment, and FIG. 9( b ) is a cross-sectional view of the valve for fluid pressure equipment.

[0026] FIG. 10( a ) is a top view of a valve for a fluid pressure device.

[0027] FIG10( b ) is a cross-sectional view of the valve for fluid pressure equipment.

[0028] FIG. 11( a ) is a top view of a valve for a fluid pressure device.

[0029] FIG11( b ) is a cross-sectional view of the valve for fluid pressure equipment. DETAILED DESCRIPTION

[0030] Below, according to Figure 1 to Figure 11(b) An embodiment of a fluid pressure device valve will be described. The fluid pressure device valve of this embodiment is mounted on a solenoid valve manifold. The solenoid valve manifold is used to supply or discharge fluid to the fluid pressure device.

[0031] like Figure 1 As shown, the solenoid valve manifold 10 includes a solenoid valve 11, a pilot check valve 12, a manifold base 13, and a fluid pressure device valve 14. The solenoid valve 11 has a supply port P, a first output port A, a second output port B, a first discharge port R1, and a second discharge port R2. Therefore, the solenoid valve 11 of this embodiment is a five-way solenoid valve.

[0032] The solenoid valve 11 has a first pilot valve V1 and a second pilot valve V2. The first pilot valve V1 and the second pilot valve V2 are well-known pilot valves. For example, a voltage is applied to the first pilot valve V1, and a voltage is stopped from being applied to the second pilot valve V2. Then, the solenoid valve 11 is switched to a first switching state in which the supply port P is connected to the first output port A, and the second output port B is connected to the second discharge port R2. When the solenoid valve 11 is in the first switching state, the first output port A is not connected to the first discharge port R1, and the supply port P is not connected to the second output port B.

[0033] For example, the voltage application to the first pilot valve V1 is stopped, and the voltage application to the second pilot valve V2 is performed. Then, the solenoid valve 11 is switched to the second switching state in which the supply port P is connected to the second output port B, and the first output port A is connected to the first discharge port R1. When the solenoid valve 11 is in the second switching state, the second output port B is not connected to the second discharge port R2, and the supply port P is not connected to the first output port A.

[0034] For example, the voltage application to both the first pilot valve V1 and the second pilot valve V2 is stopped. Then, the solenoid valve 11 is switched to the third switching state in which the first output port A is connected to the first discharge port R1, and the second output port B is connected to the second discharge port R2. When the solenoid valve 11 is in the third switching state, the supply port P is not connected to the first output port A, and the supply port P is not connected to the second output port B.

[0035] As described above, the solenoid valve 11 of this embodiment is a pilot operated three-position switching valve capable of switching to three switching states: a first switching state, a second switching state, and a third switching state. This pilot operated three-position switching valve is a well-known switching valve, and thus detailed description of the structure is omitted.

[0036] The manifold base 13 has a supply flow path 13a, a first output flow path 13b, a second output flow path 13c, a first exhaust flow path 13d, and a second exhaust flow path 13e. The supply flow path 13a is connected to the fluid supply source 15, for example, via a pipe or the like. The compressed fluid is supplied to the supply flow path 13a from the fluid supply source 15. The first output flow path 13b is connected to the first cylinder chamber 16a of the fluid pressure device 16, for example, via a pipe or the like. The second output flow path 13c is connected to the second cylinder chamber 16b of the fluid pressure device 16, for example, via a pipe or the like. The first exhaust flow path 13d and the second exhaust flow path 13e are respectively connected to the outside, for example, via a pipe or the like.

[0037] The pilot-operated check valve 12 is interposed between the solenoid valve 11 and the manifold base 13. The pilot-operated check valve 12 has a spacer 20 and a housing 21. The housing 21 is rectangular. The spacer 20 is rectangular. The spacer 20 is connected to a first end surface located on one side of the housing 21 in the longitudinal direction.

[0038] The fluid pressure equipment valve 14 is integrated with the pilot check valve 12. The fluid pressure equipment valve 14 is integrated with the pilot check valve 12 by connecting the housing 50 of the fluid pressure equipment valve 14 to the second end surface located on the other side of the housing 21 in the longitudinal direction.

[0039] like Figure 2 and Figure 3As shown, the housing 21 has a slide valve hole 22. The slide valve hole 22 is a circular hole. The slide valve hole 22 extends in the length direction of the housing 21. One end of the slide valve hole 22 opens at the first end surface of the housing 21. The other end of the slide valve hole 22 opens at the second end surface of the housing 21.

[0040] A columnar slide valve 23 is accommodated in the slide valve hole 22. The slide valve 23 can reciprocate in the slide valve hole 22 in the axial direction of the slide valve hole 22. The slide valve 23 includes a large diameter portion 24, a first small diameter portion 25, and a second small diameter portion 26. The large diameter portion 24 is cylindrical. The outer diameter of the large diameter portion 24 is slightly smaller than the hole diameter of the slide valve hole 22. An annular sealing member 27 is attached to the outer peripheral surface of the large diameter portion 24. The sealing member 27 seals between the large diameter portion 24 and the slide valve hole 22.

[0041] The first small diameter portion 25 is cylindrical. The outer diameter of the first small diameter portion 25 is smaller than the outer diameter of the large diameter portion 24. The first small diameter portion 25 protrudes from the first end surface of the large diameter portion 24. The second small diameter portion 26 is cylindrical. The outer diameter of the second small diameter portion 26 is smaller than the outer diameter of the large diameter portion 24. The second small diameter portion 26 protrudes from the second end surface of the large diameter portion 24. The outer diameter of the first small diameter portion 25 is the same as the outer diameter of the second small diameter portion 26. The axis of the large diameter portion 24, the axis of the first small diameter portion 25, and the axis of the second small diameter portion 26 are respectively consistent.

[0042] A first valve seat forming body 28 is provided at the first end of the slide valve hole 22. The first valve seat forming body 28 is cylindrical. The first valve seat forming body 28 is fixed to the slide valve hole 22 by being pressed into the inner peripheral surface of the slide valve hole 22, for example. The first end surface located at one end in the axial direction of the first valve seat forming body 28 is opposed to the large diameter portion 24 of the slide valve 23 in the axial direction of the slide valve 23. The second end surface located at the other end in the axial direction of the first valve seat forming body 28 is adjacent to the first end of the slide valve hole 22.

[0043] The first valve seat forming body 28 has a first axial hole 29, a first axial path 30, and a first path 31. The first axial hole 29 is in the shape of a circular hole. The first axial hole 29 opens at the first end surface of the first valve seat forming body 28. The hole diameter of the first axial hole 29 is slightly larger than the outer diameter of the first small diameter portion 25. The first axial path 30 is connected to the first axial hole 29. The first axial path 30 extends in the axial direction of the first valve seat forming body 28 from the first axial hole 29 toward the second end surface of the first valve seat forming body 28. The end of the first axial path 30 on the opposite side to the first axial hole 29 opens at the second end surface of the first valve seat forming body 28. The first axial path 30 is in the shape of a circular hole. The hole diameter of the first axial path 30 is larger than the hole diameter of the first axial hole 29. The first path 31 extends in the radial direction of the first valve seat forming body 28. One end of the first path 31 is connected to the first axial path 30. The other end of the first passage 31 opens at the outer peripheral surface of the first valve seat forming body 28. The first valve seat forming body 28 has an annular first check valve seat 32. The first check valve seat 32 protrudes from the second end surface of the first valve seat forming body 28 around the first axial passage 30.

[0044] A second valve seat forming body 33 is provided at the second end of the slide valve hole 22. The second valve seat forming body 33 is cylindrical. The second valve seat forming body 33 is fixed to the slide valve hole 22 by being pressed into the inner peripheral surface of the slide valve hole 22, for example. The first end surface located at one end in the axial direction of the second valve seat forming body 33 is opposed to the large diameter portion 24 of the slide valve 23 in the axial direction of the slide valve 23. The second end surface located at the other end in the axial direction of the second valve seat forming body 33 is adjacent to the second end of the slide valve hole 22.

[0045] The second valve seat forming body 33 has a second axial hole 34, a second axial path 35, and a second path 36. The second axial hole 34 is in the shape of a circular hole. The second axial hole 34 opens at the first end surface of the second valve seat forming body 33. The aperture of the second axial hole 34 is slightly larger than the outer diameter of the second small diameter portion 26. The second axial path 35 is connected to the second axial hole 34. The second axial path 35 extends in the axial direction of the second valve seat forming body 33 from the second axial hole 34 toward the second end surface of the second valve seat forming body 33. The end of the second axial path 35 on the opposite side to the second axial hole 34 opens at the second end surface of the second valve seat forming body 33. The second axial path 35 is in the shape of a circular hole. The aperture of the second axial path 35 is larger than the aperture of the second axial hole 34. The second path 36 extends in the radial direction of the second valve seat forming body 33. One end of the second path 36 is connected to the second axial path 35. The other end of the second passage 36 opens on the outer peripheral surface of the second valve seat forming body 33. The second valve seat forming body 33 has an annular second check valve seat 37. The second check valve seat 37 protrudes from the second end surface of the second valve seat forming body 33 around the second axial passage 35.

[0046] The first small diameter portion 25 of the slide valve 23 protrudes into the first axial path 30 through the first axial hole 29. A first return spring 38 is interposed between the first end surface of the large diameter portion 24 and the first end surface of the first valve seat forming body 28. The first return spring 38 urges the large diameter portion 24 in a direction away from the first valve seat forming body 28.

[0047] The second small diameter portion 26 of the slide valve 23 protrudes into the second axial path 35 through the second axial hole 34. A second return spring 39 is interposed between the second end surface of the large diameter portion 24 and the first end surface of the second valve seat forming body 33. The second return spring 39 urges the large diameter portion 24 in a direction away from the second valve seat forming body 33. The spring force of the first return spring 38 and the spring force of the second return spring 39 are set to be the same.

[0048] The spacer 20 has a first check valve chamber 40. The first check valve chamber 40 is provided to be recessed on the surface of the spacer 20 that is opposite to the first end surface of the housing 21. The first check valve chamber 40 is in the shape of a circular hole. The aperture of the first check valve chamber 40 is larger than the aperture of the first axial path 30. A first check valve body 41 is accommodated in the first check valve chamber 40. The first check valve body 41 can contact or separate from the first check valve seat 32. A first check valve urging spring 42 is accommodated in the first check valve chamber 40. The first check valve urging spring 42 urges the first check valve body 41 toward the first check valve seat 32.

[0049] The housing 50 has a second check valve chamber 43. The second check valve chamber 43 is provided to be recessed on the surface of the housing 50 that is opposite to the second end surface of the shell 21. The second check valve chamber 43 is in the shape of a circular hole. The aperture of the second check valve chamber 43 is larger than the aperture of the second axial path 35. A second check valve body 44 is accommodated in the second check valve chamber 43. The second check valve body 44 can contact or separate from the second check valve seat 37. A second check valve urging spring 45 is accommodated in the second check valve chamber 43. The second check valve urging spring 45 urges the second check valve body 44 toward the first check valve seat 32.

[0050] like Figure 4 , Figure 5 as well as Figure 6As shown, the housing 50 of the fluid pressure device valve 14 has a first inlet 51, a second inlet 52, a first valve chamber 53, and a second valve chamber 54. One end of the first inlet 51 is connected to the first valve chamber 53, and the other end of the first inlet 51 is opened on the surface of the housing 50 opposite to the second end surface of the shell 21. One end of the second inlet 52 is connected to the second valve chamber 54, and the other end of the second inlet 52 is opened on the surface of the housing 50 opposite to the second end surface of the shell 21. The first valve chamber 53 is in the shape of a circular hole. The second valve chamber 54 is in the shape of a circular hole. In addition, the housing 50 has a first discharge port 55 and a second discharge port 56 as discharge ports. Therefore, the fluid pressure device valve 14 of this embodiment has two discharge ports.

[0051] The housing 50 has a storage hole 57. The storage hole 57 is in an oval shape in a plan view. The storage hole 57 is continuous with the first valve chamber 53 and the second valve chamber 54. The first valve chamber 53 and the second valve chamber 54 are open to the storage hole 57 while being aligned in the direction in which the long axis of the storage hole 57 extends.

[0052] The fluid pressure equipment valve 14 includes a first valve body 58 and a second valve body 59 . The first valve body 58 is accommodated in the first valve chamber 53 , and the second valve body 59 is accommodated in the second valve chamber 54 .

[0053] The fluid pressure equipment valve 14 includes a valve seat forming body 60. The valve seat forming body 60 includes a valve seat main body 61, a first protrusion 62, and a second protrusion 63. The valve seat main body 61 is in an oblong shape when viewed from above. The valve seat main body 61 is in a flat plate shape. The outer peripheral edge of the valve seat main body 61 extends along the inner peripheral surface of the storage hole 57. The valve seat main body 61 is arranged on the inner side of the storage hole 57.

[0054] The first protrusion 62 and the second protrusion 63 are cylindrical and protrude from the first surface located on one side in the thickness direction of the valve seat body 61. The first protrusion 62 and the second protrusion 63 extend parallel to each other. The axial direction of the first protrusion 62 and the axial direction of the second protrusion 63 coincide with each other in the thickness direction of the valve seat body 61. The first protrusion 62 and the second protrusion 63 are arranged side by side in the direction in which the long axis of the valve seat body 61 extends.

[0055] The valve seat forming body 60 has a first valve hole 64, a second valve hole 65, a first valve seat 66, and a second valve seat 67. The first valve hole 64 passes through the first protrusion 62 and the valve seat main body 61. The axis of the first valve hole 64 coincides with the axis of the first protrusion 62. The second valve hole 65 passes through the second protrusion 63 and the valve seat main body 61. The axis of the second valve hole 65 coincides with the axis of the second protrusion 63. The first valve seat 66 is formed around the first valve hole 64 on the front end surface of the first protrusion 62. The first valve seat 66 is annular. The second valve seat 67 is formed around the second valve hole 65 on the front end surface of the second protrusion 63. The second valve seat 67 is annular.

[0056] In a state where the first protrusion 62 is inserted into the first valve chamber 53 and the second protrusion 63 is inserted into the second valve chamber 54, the valve seat forming body 60 is arranged inside the receiving hole 57. Therefore, the receiving hole 57 receives the valve seat forming body 60. The first valve hole 64 communicates with the first valve chamber 53, and the second valve hole 65 communicates with the second valve chamber 54. The first valve body 58 contacts or separates from the first valve seat 66. The second valve body 59 contacts or separates from the second valve seat 67.

[0057] A first sealing member 68 is mounted on the outer peripheral surface of the first protrusion 62. The first sealing member 68 is annular. The first sealing member 68 seals between the first valve chamber 53 and the storage hole 57. A second sealing member 69 is mounted on the outer peripheral surface of the second protrusion 63. The second sealing member 69 is annular. The second sealing member 69 seals between the second valve chamber 54 and the storage hole 57.

[0058] The valve seat forming body 60 has a pair of retaining pieces 70. Each retaining piece 70 is in the shape of a slender column extending from the edge of the second surface located on the other side of the valve seat main body 61 in the thickness direction in the valve seat main body 61. The two retaining pieces 70 are respectively arranged at positions opposite to each other in the direction in which the long axis of the valve seat main body 61 extends. The front end of each retaining piece 70 is hook-shaped. The front ends of the two retaining pieces 70 are respectively retained by the first discharge port 55 and the second discharge port 56. In addition, the valve seat forming body 60 is assembled to the housing 50 by retaining the two retaining pieces 70 at the first discharge port 55 and the second discharge port 56.

[0059] The fluid pressure device valve 14 includes a first biasing spring 71 and a second biasing spring 72. The first biasing spring 71 is accommodated in the first valve chamber 53. The first biasing spring 71 biases the first valve body 58 toward the first valve seat 66. The second biasing spring 72 is accommodated in the second valve chamber 54. The second biasing spring 72 biases the second valve body 59 toward the second valve seat 67. The spring force of the first biasing spring 71 and the spring force of the second biasing spring 72 are set to be the same.

[0060] The valve 14 for fluid pressure equipment includes a manual shaft 75 and a cylindrical operating member 81 integrally provided with the manual shaft 75. The manual shaft 75 includes a main body 76, a first shaft portion 77 and a second shaft portion 78. The main body 76 is in an oblong shape when viewed from above. The outer peripheral edge of the main body 76 extends along the inner peripheral surface of the storage hole 57. The first shaft portion 77 and the second shaft portion 78 protrude from the main body 76 in a state of being arranged side by side in the direction in which the long axis of the main body 76 extends. The first shaft portion 77 and the second shaft portion 78 are in the shape of an elongated cylinder. The first shaft portion 77 and the second shaft portion 78 extend parallel to each other. In a state in which the first shaft portion 77 is inserted into the first valve hole 64 and the second shaft portion 78 is inserted into the second valve hole 65, the manual shaft 75 is arranged in the storage hole 57. The manual shaft 75 can move relative to the housing 50. The moving direction of the manual shaft 75 relative to the housing 50 is the direction in which the first shaft portion 77 and the second shaft portion 78 extend.

[0061] A third biasing spring 73 is provided between the main body 76 and the valve seat forming body 60. The third biasing spring 73 biases the manual shaft 75 in a direction in which the first shaft 77 is separated from the first valve body 58 and in a direction in which the second shaft 78 is separated from the second valve body. The third biasing spring 73 is disposed between the first shaft 77 and the second shaft 78 in a direction in which the major axis of the main body 76 extends.

[0062] like Figure 6 As shown, for example, it is assumed that the manual shaft 75 moves in a direction in which the first shaft portion 77 approaches the first valve body 58 and in a direction in which the second shaft portion 78 approaches the second valve body 59 by the biasing force of the third biasing spring 73. Then, the first shaft portion 77 overcomes the biasing force of the first biasing spring 71 and presses the first valve body 58 in a direction away from the first valve seat 66, so that the first valve body 58 is in a valve-opening state. Furthermore, the second shaft portion 78 overcomes the biasing force of the second biasing spring 72 and presses the second valve body 59 in a direction away from the second valve seat 67, so that the second valve body 59 is in a valve-opening state.

[0063] like Figure 5 As shown, for example, it is assumed that the manual shaft 75 moves in the direction in which the first shaft portion 77 is separated from the first valve body 58 and in the direction in which the second shaft portion 78 is separated from the second valve body 59 by the force of the third force spring 73. Then, the first valve body 58 moves in the direction close to the first valve seat 66 by the force of the first force spring 71 and is seated on the first valve seat 66, and the first valve body 58 is in the valve closed state. Moreover, the second valve body 59 moves in the direction close to the second valve seat 67 by the force of the second force spring 72 and is seated on the second valve seat 67, and the second valve body 59 is in the valve closed state.

[0064] like Figure 4 , Figure 5 as well as Figure 6As shown, the manual shaft 75 has a storage recess 79 and an insertion hole 80. The storage recess 79 is provided to be recessed on the end surface of the main body 76 located on the side opposite to the protruding portion of the first shaft portion 77 and the second shaft portion 78. The storage recess 79 is in the shape of a circular hole. An operating member 81 is stored in the storage recess 79. The operating member 81 is stored in the storage recess 79 in a state where the axial direction of the operating member 81 is consistent with the moving direction of the manual shaft 75 relative to the housing 50.

[0065] The insertion hole 80 is connected to the inner side of the storage recess 79. The insertion hole 80 is a rectangular hole extending in the moving direction of the manual shaft 75 relative to the housing 50. The insertion hole 80 passes through the manual shaft 75 in a direction orthogonal to the moving direction of the manual shaft 75 relative to the housing 50. The insertion hole 80 is open at the side of the storage recess 79.

[0066] The housing 50 is provided with a fixing pin 90 as an insertion member. The housing 50 is formed with a circular hole 50h for holding the fixing pin 90. The holding hole 50h passes through the housing 50 and opens at the inner peripheral surface of the storage hole 57. The fixing pin 90 is in the shape of an elongated column. The fixing pin 90 protrudes from the holding hole 50h to the inner side of the storage hole 57. Furthermore, the fixing pin 90 protrudes to the inner side of the storage recess 79 through the insertion hole 80. The outer diameter of the fixing pin 90 is slightly smaller than the circumferential width of the storage recess 79 in the insertion hole 80.

[0067] like Figure 7 and Figure 8 As shown, the operating member 81 has a non-locking hole 82 and a locking hole 83. Figure 8 As shown, the non-locking hole 82 is open on the outer peripheral surface of the operating member 81. The non-locking hole 82 is a rectangular hole extending in the moving direction of the manual shaft 75 relative to the housing 50. The length direction of the non-locking hole 82 is consistent with the axial direction of the operating member 81. Therefore, the length direction of the non-locking hole 82 is consistent with the moving direction of the manual shaft 75 relative to the housing 50. The width of the non-locking hole 82 in the circumferential direction of the operating member 81 is slightly larger than the outer diameter of the fixing pin 90. The width of the non-locking hole 82 in the circumferential direction of the operating member 81 is the same as the width of the circumferential direction of the storage recess 79 in the insertion hole 80. In addition, the non-locking hole 82 allows the manual shaft 75 to move relative to the housing 50 and restricts the operating member 81 from rotating around the axis of the operating member 81 in the storage recess 79 when the fixing pin 90 is inserted into the non-locking hole 82 to a position that does not reach the axis of the operating member 81.

[0068] like Figure 7As shown, the locking hole 83 has a first hole 84 and a second hole 85. The first hole 84 is a rectangular hole extending in the moving direction of the manual shaft 75 relative to the housing 50. The length direction of the first hole 84 is consistent with the axial direction of the operating member 81. Therefore, the length direction of the first hole 84 is consistent with the moving direction of the manual shaft 75 relative to the housing 50. The first hole 84 is opened on the outer peripheral surface of the operating member 81 at a position separated by 180 degrees in the circumferential direction of the operating member 81 relative to the opening position of the non-locking hole 82. In the present embodiment, the first hole 84 and the non-locking hole 82 are respectively a part of the hole penetrating in the radial direction of the operating member 81. Therefore, the first hole 84 is continuous with the non-locking hole 82. In the present embodiment, the non-locking hole 82 is connected to a part of the locking hole 83. The width of the first hole 84 in the circumferential direction of the operating member 81 is the same as the width of the non-locking hole 82 in the circumferential direction of the operating member 81. Therefore, the circumferential width of the operation member 81 in the first hole 84 is slightly larger than the outer diameter of the fixing pin 90 .

[0069] The second hole 85 is continuous with the first hole 84 and extends in the circumferential direction of the operating member 81. The second hole 85 extends 90 degrees from the first hole 84 in the circumferential direction of the operating member 81. The axial width of the operating member 81 in the second hole 85 is slightly larger than the outer diameter of the fixing pin 90. The surface of the second hole 85 located on the first end face 81a side of the operating member 81 is set on the same surface as the surface of the first hole 84 located on the first end face 81a side of the operating member 81. The surface of the second hole 85 located on the second end face 81b side of the operating member 81 is set closer to the first end face 81a of the operating member 81 than the surface of the first hole 84 located on the second end face 81b side of the operating member 81. Therefore, in the lock hole 83 , a stepped surface 86 extending in the axial direction of the operation member 81 is formed between a surface of the first hole 84 located on the second end surface 81 b side of the operation member 81 and a surface of the second hole 85 located on the second end surface 81 b side of the operation member 81 .

[0070] The lock hole 83 allows the manual shaft 75 to move relative to the housing 50 in a state where the fixing pin 90 is inserted into the first hole 84 of the lock hole 83 to a position that does not reach the axis of the operating member 81. In addition, after the manual shaft 75 is moved to a position where the first valve body 58 and the second valve body 59 are respectively in the valve open state, the lock hole 83 allows the operating member 81 to rotate around the axis of the operating member 81 in the storage recess 79 through the second hole 85. Furthermore, after the rotation of the operating member 81, the lock hole 83 allows the manual shaft 75 to move relative to the housing 50 through the second hole 85.

[0071] like Figure 7As shown in FIG. 1 , a slit groove 87 is formed on the first end face 81a of the operating member 81. The slit groove 87 extends in the radial direction of the operating member 81. In addition, a first mark 88a is provided on the first end face 81a of the operating member 81. The first mark 88a is arranged at a position overlapping with the first hole 84 in the axial direction of the operating member 81. Therefore, the first mark 88a is arranged at a position corresponding to the first hole 84 in the circumferential direction of the operating member 81.

[0072] like Figure 8 As shown in FIG. 1 , a conical recess 89 is formed on the second end face 81b of the operating member 81. The recess 89 is formed in the central portion of the second end face 81b of the operating member 81. In addition, a second mark 88b is provided on the second end face 81b of the operating member 81. The second mark 88b is arranged at a position overlapping with the non-locking hole 82 in the axial direction of the operating member 81. Therefore, the second mark 88b is arranged at a position corresponding to the non-locking hole 82 in the circumferential direction of the operating member 81.

[0073] like Figure 4 As shown, the housing 50 has an operation opening 50a. The operation opening 50a is connected to the inside of the storage hole 57. The operation opening 50a extends from the opening edge of the storage hole 57 to the moving direction of the manual shaft 75 relative to the housing 50. In addition, two screw insertion holes 50b are formed in the housing 50. Screws B1 for fixing the housing 50 to the housing 21 are respectively inserted into each screw insertion hole 50b. And, each screw B1 inserted into each screw insertion hole 50b is screwed into the housing 21, so that the housing 50 is fixed to the housing 21.

[0074] like Figure 1 As shown, the solenoid valve manifold 10 has a first communication flow path 91, a second communication flow path 92, and a third communication flow path 93 that penetrate the partition 20. The first communication flow path 91 connects the supply port P with the supply flow path 13a. The second communication flow path 92 connects the first discharge port R1 with the first discharge flow path 13d. The third communication flow path 93 connects the second discharge port R2 with the second discharge flow path 13e.

[0075] In addition, the solenoid valve manifold 10 has a fourth communication flow path 94, a fifth communication flow path 95, a sixth communication flow path 96, and a seventh communication flow path 97 that penetrate the spacer 20 and the housing 21. The fourth communication flow path 94 communicates the first output port A with the first path 31 of the first valve seat forming body 28. The fifth communication flow path 95 communicates the first check valve chamber 40 with the first output flow path 13b. In addition, the fifth communication flow path 95 communicates with the first introduction port 51. The sixth communication flow path 96 communicates the second output port B with the second path 36 of the second valve seat forming body 33. The seventh communication flow path 97 communicates the second introduction port 52 with the second output flow path 13c. In addition, the housing 50 is formed with an eighth communication flow path 98 that communicates the second valve chamber 54 with the second check valve chamber 43.

[0076] For example, consider the case where the first valve body 58 and the second valve body 59 of the fluid pressure device valve 14 are in the closed valve state, and the solenoid valve 11 is in the first switching state. At this time, the fluid from the fluid supply source 15 is output to the first axial path 30 via the supply flow path 13a, the first communication flow path 91, the supply port P, the first output port A, the fourth communication flow path 94, and the first path 31. Here, as Figure 3 As shown, the pressure of the fluid output to the first axial path 30 overcomes the force of the first check biasing spring 42, so that the first check valve body 41 is separated from the first check valve seat 32. In addition, the fluid output to the first axial path 30 is output to the first cylinder chamber 16a of the fluid pressure device 16 via the first check valve chamber 40, the fifth communication flow path 95, and the first output flow path 13b.

[0077] In addition, the fluid output to the first axial path 30 flows out between the first end surface of the large diameter portion 24 and the first end surface of the first valve seat forming body 28 through the first axial hole 29. And, due to the fluid pressure received by the large diameter portion 24 and the force of the first return spring 38, the slide valve 23 moves toward the second check valve body 44, and the second small diameter portion 26 presses the second check valve body 44, so that the second check valve body 44 is separated from the second check valve seat 37.

[0078] Furthermore, the fluid in the second cylinder chamber 16b of the fluid pressure device 16 is discharged to the outside via the second output flow path 13c, the seventh communication flow path 97, the second introduction port 52, the second valve chamber 54, the eighth communication flow path 98, the second check valve chamber 43, the second axial path 35, the second path 36, the sixth communication flow path 96, the second output port B, the second discharge port R2, the third communication flow path 93, and the second discharge flow path 13e. Thus, the position of the piston 17 of the fluid pressure device 16 is switched to the first piston position, which is the state in which the piston rod 17a is most sunken.

[0079] For example, consider the case where the first valve body 58 and the second valve body 59 of the fluid pressure device valve 14 are in the closed valve state, and the solenoid valve 11 is in the second switching state. At this time, the fluid from the fluid supply source 15 is output to the second axial path 35 via the supply flow path 13a, the first communication flow path 91, the supply port P, the second output port B, the sixth communication flow path 96, and the second path 36. Here, the pressure of the fluid output to the second axial path 35 overcomes the biasing force of the second check biasing spring 45, and the second check valve body 44 is separated from the second check valve seat 37. In addition, the fluid output to the second axial path 35 is output to the second cylinder chamber 16b of the fluid pressure device 16 via the second check valve chamber 43, the eighth communication flow path 98, the second valve chamber 54, the second introduction port 52, the seventh communication flow path 97, and the second output flow path 13c.

[0080] In addition, the fluid output to the second axial path 35 flows out between the second end face of the large diameter portion 24 and the first end face of the second valve seat forming body 33 through the second axial hole 34. And, due to the fluid pressure received by the large diameter portion 24 and the force of the second return spring 39, the slide valve 23 moves toward the first check valve body 41, and the first small diameter portion 25 presses the first check valve body 41, so that the first check valve body 41 is separated from the first check valve seat 32.

[0081] Furthermore, the fluid in the first cylinder chamber 16a of the fluid pressure device 16 is discharged to the outside via the first output flow path 13b, the fifth communication flow path 95, the first check valve chamber 40, the first axial path 30, the first path 31, the fourth communication flow path 94, the first output port A, the first discharge port R1, the second communication flow path 92, and the first discharge flow path 13d. Thus, the position of the piston 17 of the fluid pressure device 16 is switched to the second piston position, for example, in which the piston rod 17a is most protruding.

[0082] For example, consider the case where the first valve body 58 and the second valve body 59 of the fluid pressure device valve 14 are in the closed valve state, and the solenoid valve 11 is in the third switching state. At this time, the fluid of the first output port A is discharged to the outside through the first discharge port R1, the second communication flow path 92, and the first discharge flow path 13d, and the fluid of the second output port B is discharged to the outside through the second discharge port R2, the third communication flow path 93, and the second discharge flow path 13e. In addition, the first check valve body 41 moves toward the first check valve seat 32 by the force of the first check force spring 42 and sits on the first check valve seat 32, and the second check valve body 44 moves toward the second check valve seat 37 by the force of the second check force spring 45 and sits on the second check valve seat 37. As a result, the fluids output to the first cylinder chamber 16a and the second cylinder chamber 16b are maintained, and the piston 17 stops at the intermediate position. As described above, the pilot-operated check valve 12 holds the fluids respectively output to the two cylinder chambers of the fluid pressure device 16, namely, the first cylinder chamber 16a and the second cylinder chamber 16b, so that the piston 17 of the fluid pressure device 16 stops at the intermediate position. In addition, since the pressure does not act on the large-diameter portion 24, the slide valve 23 is held at a position in which the force of the first return spring 38 and the force of the second return spring 39 are balanced.

[0083] The fluid in the second cylinder chamber 16b is introduced into the second introduction port 52 from the seventh communication flow path 97. In addition, the fluid in the first cylinder chamber 16a is introduced into the first introduction port 51 from the fifth communication flow path 95, for example.

[0084] Next, the operation of this embodiment will be described.

[0085] For example, during maintenance, it is necessary to discharge the fluid remaining in the first cylinder chamber 16 a and the second cylinder chamber 16 b of the fluid pressure device 16 to the outside through the fluid pressure device valve 14 .

[0086] like Figure 5 and Figure 6 As shown, it is assumed that the operating member 81 is stored in the storage recess 79 in such a manner that the fixing pin 90 is inserted into the non-locking hole 82 and the second end surface 81b of the operating member 81 is adjacent. In addition, at this time, when the operating member 81 is stored in the storage recess 79, it is stored in such a manner that the second mark 88b corresponds to the position of the insertion hole 80 in the circumferential direction of the operating member 81. As a result, the operating member 81 is stored in the storage recess 79 in a state where the non-locking hole 82 and the insertion hole 80 are connected. In addition, during maintenance, the operator inserts, for example, a tool with a pointed tip into the conical recess 89 formed in the center of the second end surface 81b of the operating member 81, and presses the operating member 81 with the tool.

[0087] like Figure 6As shown in FIG. 1 , when the operation member 81 is pushed in, the manual shaft 75 overcomes the biasing force of the third biasing spring 73 and moves in the direction in which the first shaft portion 77 approaches the first valve body 58 and in the direction in which the second shaft portion 78 approaches the second valve body 59. Furthermore, the first shaft portion 77 overcomes the biasing force of the first biasing spring 71 and presses the first valve body 58 in the direction away from the first valve seat 66, so that the first valve body 58 is in the valve-opening state. Furthermore, the second shaft portion 78 overcomes the biasing force of the second biasing spring 72 and presses the second valve body 59 in the direction away from the second valve seat 67, so that the second valve body 59 is in the valve-opening state. Thus, the fluid introduced into the first inlet 51 flows into the receiving hole 57 via the first valve chamber 53 and the first valve hole 64, and is discharged from the receiving hole 57 to the outside via the first discharge port 55 and the second discharge port 56. In addition, the fluid introduced into the second inlet 52 flows into the receiving hole 57 via the second valve chamber 54 and the second valve hole 65, and is discharged to the outside from the receiving hole 57 via the first discharge port 55 and the second discharge port 56. Thus, the fluid remaining in the first cylinder chamber 16a and the second cylinder chamber 16b of the fluid pressure device 16 is discharged to the outside.

[0088] like Figure 5 As shown in the figure, when the pressing of the operating member 81 by the operator is released, the manual shaft 75 returns to the original position before being pressed by the operator due to the force of the third force spring 73. In addition, the first valve body 58 moves toward the direction close to the first valve seat 66 by the force of the first force spring 71 and sits on the first valve seat 66, and the first valve body 58 is in a closed valve state. In addition, the second valve body 59 moves toward the direction close to the second valve seat 67 by the force of the second force spring 72 and sits on the second valve seat 67, and the second valve body 59 is in a closed valve state.

[0089] As shown in Fig. 9 (a) and Fig. 9 (b), it is assumed that the operating member 81 is stored in the storage recess 79 in such a manner that the fixing pin 90 is inserted into the first hole 84 of the locking hole 83 and the first end surface 81a of the operating member 81 is adjacent. In addition, at this time, when the operating member 81 is stored in the storage recess 79, it is stored in such a manner that the first mark 88a corresponds to the position of the insertion hole 80 in the circumferential direction of the operating member 81. Thus, the operating member 81 is stored in the storage recess 79 in a state where the first hole 84 of the locking hole 83 is connected to the insertion hole 80. In addition, during maintenance, the operator inserts the front end of a tool such as a horizontal screwdriver into the slit groove 87 formed on the first end surface 81a of the operating member 81, and presses the operating member 81 with the tool.

[0090] As shown in Fig. 10(a) and Fig. 10(b), when the operation member 81 is pressed in, the manual shaft 75 overcomes the biasing force of the third biasing spring 73 and moves in the direction in which the first shaft portion 77 approaches the first valve body 58 and in the direction in which the second shaft portion 78 approaches the second valve body 59. Furthermore, the first shaft portion 77 overcomes the biasing force of the first biasing spring 71 and presses the first valve body 58 in the direction away from the first valve seat 66, so that the first valve body 58 is in the valve-opening state. Furthermore, the second shaft portion 78 overcomes the biasing force of the second biasing spring 72 and presses the second valve body 59 in the direction away from the second valve seat 67, so that the second valve body 59 is in the valve-opening state. Thus, the fluid introduced into the first inlet 51 flows into the receiving hole 57 via the first valve chamber 53 and the first valve hole 64, and is discharged from the receiving hole 57 to the outside via the first discharge port 55 and the second discharge port 56. In addition, the fluid introduced into the second inlet 52 flows into the receiving hole 57 via the second valve chamber 54 and the second valve hole 65, and is discharged to the outside from the receiving hole 57 via the first discharge port 55 and the second discharge port 56. Thus, the fluid remaining in the first cylinder chamber 16a and the second cylinder chamber 16b of the fluid pressure device 16 is discharged to the outside.

[0091] As shown in Fig. 11 (a) and Fig. 11 (b), the operator inserts the front end of the tool into the slit groove 87, and rotates the operating member 81 in the storage recess 79 with the axis of the operating member 81 as the center through the tool. Then, the fixing pin 90 is guided from the first hole 84 to the second hole 85, so that the operating member 81 rotates in the storage recess 79 with the axis of the operating member 81 as the center. Therefore, the slit groove 87 is an operating part for rotating the operating member 81 in the storage recess 79 with the axis of the operating member 81 as the center. Thus, the slit groove 87 is provided as an operating part on the first end face 81a of the operating member 81. Therefore, the operating part of the present embodiment is the slit groove 87 formed on the first end face 81a of the operating member 81. When the tip of the tool is removed from the slit groove 87 after the operation member 81 is rotated and the operation member 81 is pressed by the operator, the manual shaft 75 attempts to return to its original position before being pressed by the operator due to the urging force of the third urging spring 73 .

[0092] At this time, the fixing pin 90 contacts the surface of the second hole 85 on the second end surface 81b side of the operating member 81, thereby maintaining the position of the manual shaft 75. Therefore, after the manual shaft 75 is moved relative to the housing 50 to the position where the first valve body 58 and the second valve body 59 are respectively in the valve open state, even if the operating member 81 is pressed in by the operator, the first valve body 58 and the second valve body 59 are respectively maintained in the valve open state.

[0093] The following effects can be obtained in the above-mentioned embodiment.

[0094] (1) The locking hole 83 allows the manual shaft 75 to move relative to the housing 50 in a state where the fixing pin 90 is inserted into the locking hole 83, so that the manual shaft 75 moves to a position where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state. Thereafter, the operating member 81 is allowed to rotate about the axis of the operating member 81 in the storage recess 79, and the movement of the manual shaft 75 relative to the housing 50 after the operating member 81 rotates is restricted. Therefore, after the manual shaft 75 is moved relative to the housing 50 to a position where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state, the position of the manual shaft 75 can be maintained. That is, the valve 14 for fluid pressure equipment can be used as a locking specification that can maintain the position of the manual shaft 75 after the manual shaft 75 is moved relative to the housing 50 to a position where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state.

[0095] On the other hand, the non-locking hole 82 allows the manual shaft 75 to move relative to the housing 50 in a state where the fixing pin 90 is inserted into the non-locking hole 82, and restricts the operation member 81 from rotating about the axis of the operation member 81 in the storage recess 79. Thus, for example, after the manual shaft 75 is moved relative to the housing 50 to positions where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state, the operation member 81 is restricted from rotating about the axis of the operation member 81 in the storage recess 79. Therefore, even if it is not necessary to maintain the position of the manual shaft 75 after the manual shaft 75 is moved relative to the housing 50 to positions where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state, the problem of unintentionally maintaining the position of the manual shaft 75 can be avoided. That is, even if the manual shaft 75 is moved relative to the housing 50 to positions where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state, the valve for fluid pressure equipment 14 can be used as a non-locking specification in which the position of the manual shaft 75 is not maintained. As described above, it is possible to provide the fluid pressure equipment valve 14 which can be easily used separately as a locking specification and a non-locking specification.

[0096] (2) The manual shaft 75 includes a main body 76 that is in an oblong shape when viewed from above, a housing recess 79 is formed in the main body 76, and the first shaft 77 and the second shaft 78 protrude from the main body 76 in a state of being arranged side by side in the direction in which the long axis of the main body 76 extends. Thus, for example, compared with a case where the main body 76 is in a perfect circular shape when viewed from above, the manual shaft 75 can be made compact.

[0097] (3) When the first valve body 58 is seated on the first valve seat 66 and the first valve body 58 is in the valve-closed state, and the second valve body 59 is seated on the second valve seat 67 and the second valve body 59 is in the valve-closed state, the manual shaft 75 is urged by the urging force of the third urging spring 73 in the direction in which the first shaft portion 77 is separated from the first valve body 58 and in the direction in which the second shaft portion 78 is separated from the second valve body 59. Therefore, when the first valve body 58 is in the valve-closed state, the first shaft portion 77 can be separated from the first valve body 58, and when the second valve body 59 is in the valve-closed state, the second shaft portion 78 can be separated from the second valve body 59. As a result, the first valve body 58 can be reliably placed in the valve-closed state, and the second valve body 59 can be reliably placed in the valve-closed state, and reliability can be improved.

[0098] (4) The valve seat forming body 60 has two locking pieces 70, and the two locking pieces 70 are respectively locked with the first discharge port 55 and the second discharge port 56. Therefore, since the first discharge port 55 and the second discharge port 56 can be used as holes in which the locking pieces 70 of the valve seat forming body 60 are locked, it is not necessary to form holes in which the locking pieces 70 are locked separately in the housing 50, and the structure of the housing 50 can be simplified.

[0099] (5) The first end surface 81a of the operating member 81 is provided with a slit groove 87 for rotating the operating member 81 around the axis of the operating member 81 in the storage recess 79, and a conical recess 89 is formed in the center of the second end surface 81b of the operating member 81. And, for example, the operating member 81 is stored in the storage recess 79 in such a manner that the fixing pin 90 is inserted into the locking hole 83 and the first end surface 81a of the operating member 81 is close. Thus, the operator can know that the manual shaft 75 is locked after being moved relative to the housing 50 to the position where the first valve body 58 and the second valve body 59 are respectively in the valve open state. And, after the operator moves the manual shaft 75 to the position where the first valve body 58 and the second valve body 59 are respectively in the valve open state, the operator rotates the operating member 81 around the axis of the operating member 81 in the storage recess 79 using the slit groove 87. Thus, after the manual shaft 75 is moved relative to the housing 50 to the position where the first valve body 58 and the second valve body 59 are respectively in the valve open state, the position of the manual shaft 75 can be maintained.

[0100] On the other hand, for example, the operating member 81 is stored in the storage recess 79 in such a manner that the fixing pin 90 is inserted into the non-locking hole 82 and the second end surface 81b of the operating member 81 is close. Thus, the operator can be informed that the non-locking specification is achieved, and the position of the manual shaft 75 is not maintained even if the manual shaft 75 is moved relative to the housing 50 to the positions where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state. In addition, the operator inserts, for example, a tool with a pointed tip into the conical recess 89 formed in the center of the second end surface 81b of the operating member 81, and presses the operating member 81 with the tool, so that the manual shaft 75 can be moved relative to the housing 50 to the positions where the first valve body 58 and the second valve body 59 are respectively in the valve-opening state.

[0101] As described above, the locking specification and the unlocking specification can be easily used by simply selecting whether to store the operating member 81 in the storage recess 79 with the first end surface 81a of the operating member 81 close to the housing recess 79 or to store the operating member 81 in the storage recess 79 with the second end surface 81b of the operating member 81 close to the housing recess 79.

[0102] (6) The slit groove 87 is formed on the first end surface 81a of the operating member 81. Thus, for example, the front end of a tool such as a horizontal screwdriver can be inserted into the slit groove 87, and the operating member 81 can be rotated around the axis of the operating member 81 in the storage recess 79 by the tool, so that the operating member 81 can be easily rotated.

[0103] (7) The housing 50 has an operation opening 50a, which extends from the opening edge of the storage hole 57 in the direction in which the manual shaft 75 moves relative to the housing 50 and communicates with the interior of the storage hole 57. Thus, since the manual shaft 75 can be operated from the operation opening 50a, the operability of the manual shaft 75 can be improved.

[0104] (8) The pilot-operated one-way valve 12 that maintains the fluid output to the first cylinder chamber 16a and the second cylinder chamber 16b of the fluid pressure device 16 so that the piston 17 of the fluid pressure device 16 stops at the middle position is suitable as an object for integrating the valve 14 for the fluid pressure device.

[0105] (9) Since a portion of the manual shaft 75 is interposed between the operating member 81 and the third biasing spring 73, even if the operating member 81 is rotated around the axis of the operating member 81 in the storage recess 79, the spring force of the third biasing spring 73 does not affect the rotation of the operating member 81. Therefore, the operating member 81 can be smoothly rotated around the axis of the operating member 81 in the storage recess 79.

[0106] In addition, the above-mentioned embodiment can be implemented with modifications as described below. The above-mentioned embodiment and the following modifications can be implemented in combination with each other within the scope of no technical contradiction.

[0107] In the embodiment, for example, the main body 76 of the manual shaft 75 may be a perfect circle in a plan view. Alternatively, the shape of the main body 76 of the manual shaft 75 from which the first shaft 77 and the second shaft 78 protrude is not particularly limited.

[0108] In the embodiment, the fluid pressure equipment valve 14 may be configured not to include the third biasing spring 73 .

[0109] In the embodiment, the two locking pieces 70 of the valve seat forming body 60 may not be locked to the first discharge port 55 and the second discharge port 56 , respectively, and holes for locking the locking pieces 70 may be separately formed in the housing 50 .

[0110] In the embodiment, the valve seat forming body 60 is attached to the housing 50 by being locked to the first discharge port 55 and the second discharge port 56 by the two locking pieces 70, but the present invention is not limited thereto. For example, the valve seat forming body 60 may be attached to the housing 50 by screws.

[0111] In the embodiment, the operating portion for rotating the operating member 81 in the storage recess 79 around the axis of the operating member 81 is not limited to the slit groove 87, and may be, for example, a columnar protrusion protruding from the first end surface 81a of the operating member 81. Furthermore, the operator may also rotate the operating member 81 in the storage recess 79 around the axis of the operating member 81 by holding the protrusion with a tool, for example, using a tool.

[0112] In the embodiment, the slit groove 87 may not be formed on the first end surface 81 a of the operation member 81 . In addition, the recessed portion 89 may not be formed on the second end surface 81 b of the operation member 81 .

[0113] In the embodiment, the non-locking hole 82 may not communicate with a part of the locking hole 83. For example, the non-locking hole 82 and the locking hole 83 may be separate holes.

[0114] In the embodiment, the housing 50 may include an operation opening 50 a .

[0115] In the embodiment, the fixing pin 90 is used as the insertion member provided in the housing 50 and protruding into the inner side of the storage recess 79 via the insertion hole 80, but the present invention is not limited thereto. Alternatively, the insertion member may be any member provided in the housing 50 and protruding into the inner side of the storage recess 79 via the insertion hole 80 and capable of being inserted into the non-locking hole 82 or the locking hole 83.

[0116] In the embodiment, the fluid pressure equipment valve 14 may be configured such that only one discharge port is formed in the housing 50. Alternatively, the number of discharge ports formed in the housing 50 is not particularly limited.

[0117] In the embodiment, for example, the locking specification may be achieved by inserting the fixing pin 90 into the locking hole 82 while the operation member 81 is housed in the housing recess 79 with the first end surface 81 a of the operation member 81 adjacent thereto.

[0118] In the embodiment, the fluid pressure equipment valve 14 may be used for purposes other than discharging the fluid in the first cylinder chamber 16 a and the second cylinder chamber 16 b held by the pilot-operated check valve 12 to the outside during maintenance, for example.

[0119] Description of Reference Numerals

[0120] 12…Pilot operated check valve

[0121] 14…Valves for fluid pressure equipment

[0122] 16…Fluid pressure equipment

[0123] 16a ... the first cylinder chamber as the cylinder chamber

[0124] 16b…Second cylinder chamber as cylinder chamber

[0125] 17…Piston

[0126] 50…Housing

[0127] 50a ...operation opening

[0128] 51…1st inlet

[0129] 52…2nd inlet

[0130] 53…1st valve chamber

[0131] 54…2nd valve chamber

[0132] 55…1st outlet as outlet

[0133] 56… Second discharge outlet as discharge outlet

[0134] 57… Storage hole

[0135] 58…1st valve body

[0136] 59…2nd valve body

[0137] 60…valve seat forming body

[0138] 64…1st valve hole

[0139] 65…Second valve hole

[0140] 66…1st valve seat

[0141] 67…Second valve seat

[0142] 70…Stop piece

[0143] 71…1st biasing spring

[0144] 72…Second biasing spring

[0145] 73…Third biasing spring

[0146] 75…Manual axis

[0147] 76…Main body

[0148] 77…1st shaft

[0149] 78…Second shaft

[0150] 79…Storage recess

[0151] 80…Through hole

[0152] 81…Operation components

[0153] 82…Non-locking hole

[0154] 83…Locking hole

[0155] 87…Slit slot as operating part

[0156] 89…concave

[0157] 90... as a fixing pin for the insert member

Claims

1. A valve for fluid pressure equipment, comprising: A housing having a first inlet, a second inlet, a discharge port, a first valve chamber, and a second valve chamber; a first valve body housed in the first valve chamber; a second valve body housed in the second valve chamber; a valve seat forming body having a first valve hole communicating with the first valve chamber, a second valve hole communicating with the second valve chamber, a first valve seat formed around the first valve hole and in contact with or separated from the first valve body, and a second valve seat formed around the second valve hole and in contact with or separated from the second valve body; a first biasing spring for biasing the first valve body toward the first valve seat; a second biasing spring that biases the second valve body toward the second valve seat; and The manual shaft comprises: a first shaft portion, which overcomes the force of the first force spring to press the first valve body in a direction away from the first valve seat, so that the first valve body is in a valve-opening state; and a second shaft portion, which overcomes the force of the second force spring to press the second valve body in a direction away from the second valve seat, so that the second valve body is in a valve-opening state, and the manual shaft is movable relative to the housing. The fluid pressure equipment valve includes a cylindrical operating member provided integrally with the manual shaft. The manual shaft has: a circular hole-shaped housing recess in which the operating member is housed; and an insertion hole that communicates with the inner side of the housing recess and extends in a moving direction of the manual shaft relative to the housing. The housing is provided with an insertion member, the insertion member protruding toward the inner side of the storage recess through the insertion hole, The operating member is housed in the housing recess in a state where the axial direction of the operating member coincides with the moving direction of the manual shaft relative to the housing. The operating member has: a non-locking hole that allows the manual shaft to move relative to the housing and restricts the operating member from rotating about the axis of the operating member in the housing recess when the insertion member is inserted into the non-locking hole; and A locking hole allows the manual shaft to move relative to the housing when the insertion member is inserted into the locking hole and allows the operating member to rotate around the axis of the operating member in the storage recess after the manual shaft is moved to positions where the first valve body and the second valve body are respectively in an open valve state, and limits the movement of the manual shaft relative to the housing after the operating member is rotated.

2. The valve for fluid pressure equipment according to claim 1, wherein: The manual shaft has a main body portion that is in an oblong shape when viewed from above, and the housing recess is formed in the main body portion. The first shaft portion and the second shaft portion protrude from the main body portion in a state of being arranged side by side in a direction in which the major axis of the main body portion extends.

3. The valve for fluid pressure equipment according to claim 2, wherein: A third biasing spring is provided between the main body and the valve seat forming body, and biases the manual shaft in a direction in which the first shaft portion separates from the first valve body and in a direction in which the second shaft portion separates from the second valve body.

4. The valve for fluid pressure equipment according to any one of claims 1 to 3, wherein: The valve seat forming body has a locking piece, The locking piece is locked with the discharge port.

5. The valve for fluid pressure equipment according to any one of claims 1 to 3, wherein: An operating portion is provided on the first end surface of the operating member, and the operating portion is used to rotate the operating member in the housing recessed portion around the axis of the operating member. A conical recessed portion is formed at a central portion of the second end surface of the operation member.

6. The valve for fluid pressure equipment according to claim 5, wherein: The operating portion is a slit groove formed on the first end surface of the operating member.

7. The valve for fluid pressure equipment according to any one of claims 1 to 3, wherein: The housing has a receiving hole for receiving the valve seat forming body. The housing has an operation opening that extends from an opening edge of the storage hole in a moving direction of the manual shaft relative to the housing and communicates with the interior of the storage hole.

8. The valve for fluid pressure equipment according to any one of claims 1 to 3, wherein: The fluid pressure device valve is integrated with a pilot-operated check valve that holds fluids respectively output to two cylinder chambers of the fluid pressure device so that a piston of the fluid pressure device stops at an intermediate position.

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