JP7088982B2 - Pilot solenoid valve - Google Patents

Description

The present invention relates to a pilot solenoid valve.

The pilot solenoid valve has a spool valve body that switches communication between each port by reciprocating in a casing having a plurality of ports. In the casing, a first pilot pressure acting chamber and a second pilot pressure acting chamber are provided on both ends of the spool valve body, respectively. Further, the pilot solenoid valve includes a first pilot valve that supplies and discharges the pilot fluid to the first pilot pressure action chamber, and a second pilot valve that supplies and discharges the pilot fluid to the second pilot pressure action chamber. have. Then, the spool valve body reciprocates by supplying and discharging the pilot fluid to the first pilot pressure acting chamber in the first pilot valve and supplying and discharging the pilot fluid to the second pilot pressure acting chamber in the second pilot valve. Then, the communication between each port is switched.

By the way, as a wiring structure for supplying electric power to the solenoids provided in the first pilot valve and the second pilot valve, respectively, a plug-in structure has been conventionally known. In the plug-in structure, for example, the first pilot valve and the second pilot valve are assembled to the manifold block, and at the same time, the connection terminal of the first pilot valve and the connection terminal of the second pilot valve are mainly provided in the manifold block. It is designed to be connected to the connection terminal connected to the power supply. Such a plug-in structure is aesthetically pleasing because the wiring is not exposed to the outside, and it is possible to simplify the wiring work.

Further, as disclosed in Patent Document 1, for example, a pilot solenoid valve in which a first pilot valve and a second pilot valve are arranged in a state of being connected to each other is conventionally known. The pilot type solenoid valve of Patent Document 1 is a one-sided solenoid type solenoid valve in which the first pilot valve and the second pilot valve are arranged close to one side with respect to the casing. When a plug-in structure is adopted in such a one-sided solenoid type solenoid valve, there is an advantage that the feeding structure such as the connection terminal of the manifold block can be easily integrated in one place.

German Patented Invention No. 102007040929

By the way, in the case of a one-sided solenoid type solenoid valve as in Patent Document 1, the first pilot valve and the second pilot valve have a rectangular block shape having a first surface and a second surface opposite to the first surface. Each has a body. Each body is arranged so that the first surface of the body of the first pilot valve and the second surface of the body of the second pilot valve are in contact with each other, and the first surface of the body of the second pilot valve is in contact with the casing. ing. Here, consider a case where the flow path formed in the body of the first pilot valve and through which the pilot fluid flows is open to the second surface of the body of the first pilot valve. In this case, it is necessary to block the flow path that opens to the second surface of the body of the first pilot valve. At this time, the pilot fluid that flows through the flow path that opens to the second surface of the body of the first pilot valve is opened to the second surface of the body of the first pilot valve while ensuring high sealing performance so that the pilot fluid does not leak to the outside. It is desired to block the flow path.

Further, it is desired to expand the cross-sectional area of the flow path formed in each body. For example, when the first pilot valve and the second pilot valve are fixed to the casing by using screws, the first pilot valve and the second pilot valve are fixed to each body. Needs to form a screw insertion hole through which the screw is inserted. Therefore, when an attempt is made to increase the cross-sectional area of the flow path of each body, the screw insertion hole obstructs the expansion of the cross-sectional area of the flow path of the flow path.

The present invention has been made to solve the above problems, and an object thereof is to suppress leakage of the pilot fluid to the outside while ensuring high sealing performance and to expand the cross-sectional area of the flow path. The purpose is to provide a pilot solenoid valve.

In a pilot solenoid valve that solves the above problems, a spool valve body that switches communication between the ports by reciprocating in a casing having a plurality of ports, and a spool valve body in the casing on both ends of the spool valve body. For the first pilot pressure action chamber and the second pilot pressure action chamber, the first pilot valve for supplying and discharging the pilot fluid to the first pilot pressure action chamber, and the second pilot pressure action chamber, respectively. A second pilot valve for supplying and discharging a pilot fluid is provided, and the first pilot valve and the second pilot valve are arranged in a state of being connected to each other, and the first pilot valve and the second pilot valve are the first. Each has a rectangular block-shaped body having one surface and a second surface opposite to the first surface, and each of the bodies is the first surface and the second surface of the body of the first pilot valve. The second surface of the body of the pilot valve is in contact with the second surface, and the first surface of the body of the second pilot valve is in contact with the casing, and the pilot fluid flows through each body. A pilot solenoid valve in which a plurality of flow paths are formed, and the plurality of flow paths include a flow path that opens on the second surface of each of the bodies, the first pilot valve and the first pilot valve. 2 The fixing clip for fixing the pilot valve to the casing is provided, and the fixing clip has a pair of extension portions fixed to the casing and the casing by fixing the pair of extension portions to the casing. A closed portion that closes the flow path that opens to the second surface of the body of the first pilot valve with the first pilot valve and the second pilot valve sandwiched in cooperation with each other, and the closed portion. The first pilot valve has an urging portion that imparts an urging force toward the second surface of the body of the first pilot valve, the closing portion, and the second surface of the body of the first pilot valve. A sealing member for sealing between the closing portion and the second surface of the body of the first pilot valve is arranged between the two.

In the pilot solenoid valve, the fixing clip has a connecting portion for connecting the pair of extending portions, and the urging portion is bent from the connecting portion to between the pair of extending portions. The closed portion is a bent portion to be formed, and the closed portion extends from an end portion of the bent portion opposite to the connecting portion toward the pair of extending portions and is arranged between the pair of extending portions. The first state is the state before the fixing clip is fixed to the casing, and the second state is the state in which the first pilot valve and the second pilot valve are fixed to the casing by the fixing clip. Then, at least in the first state, the closed portion is separated from the connecting portion, and in the second state, the closed portion is closer to the connecting portion than in the first state. It is good.

In the pilot solenoid valve, the casing of the casing connected to each of the pair of side surfaces connecting the first surface and the second surface of each body and the pair of side surfaces of the body of the second pilot valve. It is preferable that each side surface is provided with a guide wall for guiding a portion of the pair of extending portions where the closing portion is located on the side opposite to the direction extending from the bent portion.

In the pilot solenoid valve, the bent portion may be bent in an arc shape.
In the pilot solenoid valve, the connecting portion has a plate shape, and the connecting portion has a screw that presses the closing portion against the second surface of the body of the first pilot valve in the second state. Is screwed so as to penetrate the connection portion in the plate thickness direction.

In the pilot solenoid valve, the connecting portion has a flat plate shape, and the bent portion is more than a virtual surface extending along a plate surface located on the opposite side of the pair of extending portions in the connecting portion. It is preferable that they are arranged on the side of the pair of extension portions.

In the pilot solenoid valve, the closing portion is in the shape of a plate connecting the pair of extending portions to each other, and the urging portion is provided in each of the pair of extending portions, and the pair of extending portions is provided. It is a spring portion that extends in a wavy shape with respect to the extending direction of the setting portion, and the state before fixing the fixing clip to the casing is set as the first state, and the first pilot valve and the first pilot valve and the first are provided by the fixing clip. 2 Assuming that the state in which the pilot valve is fixed to the casing is the second state, it is preferable that the spring portion is extended more than the first state in the second state.

In the pilot solenoid valve, the pair of extending portions may be flat plate-shaped.
In the pilot solenoid valve, the extended portion has a locked portion that is locked to the locking portion of the casing, and the locked portion penetrates in the plate thickness direction of the extended portion. It is a circular hole-shaped through hole, and the locking portion is a columnar locking projection that protrudes from the side surface of the casing and is fitted into the through hole. The portion of the surface opposite to the body may have an arc shape that follows the inner surface of the through hole.

In the pilot solenoid valve, the portion of the outer surface of the locking projection on the body side of the second pilot valve is tapered so that the amount of protrusion of the locking projection increases as the distance from the closed portion increases. It should be a surface.

According to the present invention, it is possible to suppress leakage of the pilot fluid to the outside while ensuring high sealing performance, and it is possible to expand the cross-sectional area of the flow path.

The cross-sectional view which shows the solenoid valve manifold in 1st Embodiment. FIG. 5 is an enlarged sectional view showing a casing and a manifold block. The cross-sectional view which shows the 1st pilot valve and the 2nd pilot valve. The perspective view which shows typically the 1st pilot valve and the 2nd pilot valve. A cross-sectional view of the flow path forming block as viewed from the first surface side. A cross-sectional view of the flow path forming block as viewed from the second surface side. Sectional drawing of the 1st pilot valve and the 2nd pilot valve. The perspective view of the fixing clip in 1st Embodiment. The perspective view which shows the 1st pilot valve and the 2nd pilot valve partially. Side view of the locking projection of the casing. The perspective view which shows the state which the 1st pilot valve and the 2nd pilot valve are fixed to a casing. (A) is a cross-sectional view showing the distance between the bent portion and the connecting portion in the first state, which is the state before fixing the fixing clip to the casing, and (b) is the first pilot valve and the second using the fixing clip. FIG. 3 is a cross-sectional view showing the distance between the bent portion and the connecting portion in the second state in which the pilot valve is fixed to the casing. The perspective view of the fixing clip in 2nd Embodiment. The perspective view which shows the state which the 1st pilot valve and the 2nd pilot valve are fixed to the casing by the fixing clip in 2nd Embodiment. An exploded perspective view of the pilot solenoid valve according to the third embodiment. The perspective view of the fixing clip in 4th Embodiment. (A) is a cross-sectional view showing the distance between the bent portion and the connecting portion in the first state, which is the state before fixing the fixing clip of the fourth embodiment to the casing, and (b) is the fourth embodiment. FIG. 3 is a cross-sectional view showing the distance between the bent portion and the connecting portion in the second state in which the fixing clip of the form is fixed to the casing.

<First Embodiment>
Hereinafter, an embodiment in which the pilot solenoid valve is embodied will be described with reference to FIGS. 1 to 12. The pilot solenoid valve of the present embodiment constitutes a solenoid valve manifold together with a manifold block.

As shown in FIG. 1, the pilot solenoid valve 10 is mounted on the mounting surface B1 of the manifold block MB. The pilot solenoid valve 10 includes a main valve portion V1, a first pilot valve 41, and a second pilot valve 42. The casing 11 of the main valve portion V1 has an elongated square block shape mounted on the mounting surface B1 of the manifold block MB.

The casing 11 is connected to a casing main body 12 having an elongated square block shape, a first connecting block 13 connected to a first end in the longitudinal direction of the casing main body 12, and a second end connected to the second end in the longitudinal direction of the casing main body 12. It has two casing blocks 14. The casing main body 12, the first connecting block 13, and the second connecting block 14 are made of, for example, a synthetic resin material. The casing main body 12 has a main body facing surface 12a facing the mounting surface B1 of the manifold block MB. The first connecting block 13 has a first facing surface 13a facing the mounting surface B1 of the manifold block MB. The second connecting block 14 has a second facing surface 14a facing the mounting surface B1 of the manifold block MB.

The first connecting block 13 has a first block main body 131 and a first adapter 132. The first block main body 131 is connected to the first end in the longitudinal direction of the casing main body 12. The first adapter 132 is connected to the surface of the first block main body 131 opposite to the casing main body 12. The second connecting block 14 has a second block main body 141 and a second adapter 142. The second block main body 141 is connected to the second end in the longitudinal direction of the casing main body 12. The second adapter 142 is connected to the surface of the second block main body 141 opposite to the casing main body 12.

As shown in FIG. 2, the casing main body 12 is formed with a circular valve hole 16 in which the spool valve body 15 is housed. The valve hole 16 extends in the longitudinal direction of the casing body 12. The first end of the valve hole 16 opens to the first end surface in the longitudinal direction of the casing main body 12, and the second end of the valve hole 16 opens to the second end surface in the longitudinal direction of the casing main body 12. Therefore, the valve hole 16 penetrates in the longitudinal direction of the casing main body 12. The spool valve body 15 is housed in the valve hole 16 so as to be reciprocally movable in the valve hole 16.

The casing main body 12 is formed with a supply port 17, a first output port 18, a second output port 19, a first discharge port 20, and a second discharge port 21. Therefore, the casing 11 has a plurality of ports. The pilot solenoid valve 10 of the present embodiment is a 5-port solenoid valve.

The supply port 17, the first output port 18, the second output port 19, the first discharge port 20, and the second discharge port 21 are first as they are directed from the first end to the second end in the longitudinal direction of the casing body 12. The discharge port 20, the first output port 18, the supply port 17, the second output port 19, and the second discharge port 21 are formed in the casing main body 12 in this order. The first ends of each of the supply port 17, the first output port 18, the second output port 19, the first discharge port 20, and the second discharge port 21 communicate with the valve hole 16. The second ends of each of the supply port 17, the first output port 18, the second output port 19, the first discharge port 20, and the second discharge port 21 are open to the main body facing surface 12a of the casing main body 12.

On the inner peripheral surface of the valve hole 16, a first valve seat portion 22 is provided between the supply port 17 and the first output port 18. Further, on the inner peripheral surface of the valve hole 16, a second valve seat portion 23 is provided between the first output port 18 and the first discharge port 20. Further, on the inner peripheral surface of the valve hole 16, a third valve seat portion 24 is provided between the supply port 17 and the second output port 19. Further, on the inner peripheral surface of the valve hole 16, a fourth valve seat portion 25 is provided between the second output port 19 and the second discharge port 21. The first valve seat portion 22, the second valve seat portion 23, the third valve seat portion 24, and the fourth valve seat portion 25 are annular shapes forming a part of the inner peripheral surface of the valve hole 16.

Further, the valve hole 16 has a first hole portion 16a that communicates with the first discharge port 20 and forms the first end portion of the valve hole 16 located on the side opposite to the second valve seat portion 23. .. Further, the valve hole 16 has a second hole portion 16b that communicates with the second discharge port 21 and forms the second end portion of the valve hole 16 located on the side opposite to the fourth valve seat portion 25. .. The inner diameters of the first valve seat portion 22, the second valve seat portion 23, the third valve seat portion 24, the fourth valve seat portion 25, the first hole portion 16a, and the second hole portion 16b are the same.

The spool valve body 15 has a first valve portion 151, a second valve portion 152, a third valve portion 153, a fourth valve portion 154, a fifth valve portion 155, and a first valve portion 151, which are separated from each other in the axial direction of the spool valve body 15. It has 6 valve portions 156. The first valve portion 151, the second valve portion 152, the third valve portion 153, the fourth valve portion 154, the fifth valve portion 155, and the sixth valve portion 156 are from the first end in the axial direction of the spool valve body 15. The fifth valve portion 155, the second valve portion 152, the first valve portion 151, the third valve portion 153, the fourth valve portion 154, and the sixth valve portion 156 are arranged in this order toward the second end. The first valve portion 151 has the same outer diameters of the second valve portion 152, the third valve portion 153, the fourth valve portion 154, the fifth valve portion 155, and the sixth valve portion 156.

The spool valve body 15 includes a first shaft portion 15a that connects the first valve portion 151 and the third valve portion 153, a second shaft portion 15b that connects the first valve portion 151 and the second valve portion 152, and the spool valve body 15. It has a third shaft portion 15c that connects the third valve portion 153 and the fourth valve portion 154. Further, the spool valve body 15 has a fourth shaft portion 15d that connects the second valve portion 152 and the fifth valve portion 155, and a fifth shaft portion 15e that connects the fourth valve portion 154 and the sixth valve portion 156. And have.

The spool valve body 15 has a columnar first protruding portion 15f protruding from an end surface of the fifth valve portion 155 opposite to the fourth shaft portion 15d. The first protruding portion 15f is the first end portion of the spool valve body 15 in the axial direction. Further, the spool valve body 15 has a columnar second protruding portion 15g that protrudes from the end surface of the sixth valve portion 156 opposite to the fifth shaft portion 15e. The second protruding portion 15g is a second end portion in the axial direction of the spool valve body 15.

The outer diameters of the first shaft portion 15a, the second shaft portion 15b, the third shaft portion 15c, the fourth shaft portion 15d, the fifth shaft portion 15e, the first protruding portion 15f, and the second protruding portion 15g are the same. The outer diameters of the first valve portion 151, the second valve portion 152, the third valve portion 153, the fourth valve portion 154, the fifth valve portion 155, and the sixth valve portion 156 are the first shaft portion 15a and the second shaft portion. It is larger than the outer diameter of the portion 15b, the third shaft portion 15c, the fourth shaft portion 15d, the fifth shaft portion 15e, the first protruding portion 15f, and the second protruding portion 15g.

On the outer peripheral surface of the first valve portion 151, a first spool packing 26 in which the first valve portion 151 sits on the first valve seat portion 22 and seals between the supply port 17 and the first output port 18 is attached. ing. On the outer peripheral surface of the second valve portion 152, a second spool packing 27 in which the second valve portion 152 sits on the second valve seat portion 23 and seals between the first output port 18 and the first discharge port 20 is provided. It is installed. On the outer peripheral surface of the third valve portion 153, a third spool packing 28 is mounted on which the third valve portion 153 sits on the third valve seat portion 24 and seals between the supply port 17 and the second output port 19. ing. On the outer peripheral surface of the fourth valve portion 154, there is a fourth spool packing 29 in which the fourth valve portion 154 sits on the fourth valve seat portion 25 and seals between the second output port 19 and the second discharge port 21. It is installed. The first spool packing 26, the second spool packing 27, the third spool packing 28, and the fourth spool packing 29 are made of rubber and have an annular shape.

The first block main body 131 of the first connecting block 13 is formed with a circular hole-shaped first piston accommodating recess 31 communicating with the first hole portion 16a. The first protruding portion 15f of the spool valve body 15 can appear and disappear from the first hole portion 16a into the first piston accommodating recess 31. A disc-shaped first piston 32 is housed in the first piston accommodating recess 31 so as to be reciprocating. The first piston 32 is attached to the tip of the first protruding portion 15f of the spool valve body 15. A first lip packing 33 is attached to the outer peripheral surface of the first piston 32. The first lip packing 33 seals between the first piston 32 and the inner peripheral surface of the first piston accommodating recess 31. Then, the first piston pressure acting chamber 34 is partitioned in the first piston accommodating recess 31 by the first piston 32. Pilot fluid is supplied and discharged to the first pilot pressure action chamber 34.

The second block main body 141 of the second connecting block 14 is formed with a circular hole-shaped second piston accommodating recess 35 communicating with the second hole portion 16b. The inner diameter of the second piston accommodating recess 35 is the same as that of the first piston accommodating recess 31. The second protruding portion 15g of the spool valve body 15 can appear and disappear from the second hole portion 16b into the second piston accommodating recess 35. A disc-shaped second piston 36 is housed in the second piston accommodating recess 35 so as to be reciprocating. The second piston 36 is attached to the tip of the second protruding portion 15g of the spool valve body 15. The outer diameter of the second piston 36 is the same as the outer diameter of the first piston 32. A second lip packing 37 is attached to the outer peripheral surface of the second piston 36. The second lip packing 37 seals between the second piston 36 and the inner peripheral surface of the second piston accommodating recess 35. Then, the second piston pressure acting chamber 38 is partitioned in the second piston accommodating recess 35 by the second piston 36. Pilot fluid is supplied and discharged to the second pilot pressure action chamber 38. Therefore, the first pilot pressure acting chamber 34 and the second pilot pressure acting chamber 38 are provided on both ends of the spool valve body 15 in the casing 11, respectively. Pilot fluid is supplied and discharged to the second pilot pressure action chamber 38.

Since the outer diameter of the first piston 32 and the outer diameter of the second piston 36 are the same, the pressure receiving area that receives the pressure of the pilot fluid in the first pilot pressure acting chamber 34 in the first piston 32 and the second piston 36. It is the same as the pressure receiving area that receives the pressure of the pilot fluid in the second pilot pressure action chamber 38 in.

A first sealing member 39a that seals between the fifth valve portion 155 and the first hole portion 16a is mounted on the outer peripheral surface of the fifth valve portion 155. The first seal member 39a is made of annular rubber. The first seal member 39a suppresses the leakage of fluid from the first discharge port 20 to the first piston accommodating recess 31 via the first hole portion 16a.

A second sealing member 39b that seals between the sixth valve portion 156 and the second hole portion 16b is mounted on the outer peripheral surface of the sixth valve portion 156. The second seal member 39b is made of annular rubber. The second seal member 39b suppresses the leakage of fluid from the second discharge port 21 to the second piston accommodating recess 35 via the second hole portion 16b.

As shown in FIG. 3, the first pilot valve 41 and the second pilot valve 42 have the same configuration. The first pilot valve 41 and the second pilot valve 42 each have a rectangular block-shaped body 60. Each body 60 has a bottomed square cylindrical solenoid case 43 and a square block-shaped flow path forming block 44 connected to the solenoid case 43, respectively. The solenoid case 43 and the flow path forming block 44 are made of, for example, a synthetic resin material. Therefore, the solenoid case 43 and the flow path forming block 44 are made of non-magnetic material.

The solenoid case 43 has a square plate-shaped bottom wall 43a and a peripheral wall 43b extending in a square cylinder shape from the outer peripheral portion of the bottom wall 43a. The flow path forming block 44 is connected to an end of the peripheral wall 43b, which is an end opposite to the bottom wall 43a. The flow path forming block 44 closes the opening of the peripheral wall 43b. A magnetic frame 45 made of a magnetic material is fixed to the solenoid case 43. The magnetic frame 45 has a plate-shaped bottom portion 45a extending along the inner surface of the bottom wall 43a of the solenoid case 43, and a cylindrical extension extending along the inner peripheral surface of the peripheral wall 43b of the solenoid case 43 from the peripheral edge portion of the bottom portion 45a. It has a portion 45b.

The first pilot valve 41 and the second pilot valve 42 each include a solenoid 46. Each solenoid 46 has a coil 47, a fixed iron core 48, a plunger 49, and a plunger spring 50. The fixed iron core 48 and the plunger 49 are made of a magnetic material. A cylindrical bobbin 51 around which a coil 47 is wound is housed in the solenoid case 43. The axis of the bobbin 51 coincides with the axis of the extending portion 45b of the magnetic frame 45.

The fixed iron core 48 is housed in the solenoid case 43. The fixed iron core 48 is columnar. The fixed iron core 48 is fixed to the bobbin 51 in a state of being inserted inside the bobbin 51. The axis of the fixed iron core 48 coincides with the axis of the bobbin 51. The axial length of the fixed iron core 48 is shorter than the axial length of the bobbin 51. The end surface 48e of the fixed iron core 48 opposite to the bottom portion 45a of the magnetic frame 45 has a flat surface shape. The end face 48e of the fixed iron core 48 is located inside the bobbin 51.

The plunger 49 is a columnar shape inserted inside the bobbin 51. The plunger 49 is located closer to the flow path forming block 44 than the fixed iron core 48. The axis of the plunger 49 coincides with the axis of the fixed iron core 48. The end face 49e on the fixed iron core 48 side in the plunger 49 has a flat surface shape. The end face 49e of the plunger 49 is in surface contact with the end face 48e of the fixed iron core 48. The end of the plunger 49 opposite to the fixed core 48 protrudes from the bobbin 51. An annular flange portion 49f projects from the end portion of the outer peripheral surface of the plunger 49 opposite to the fixed iron core 48.

A cylindrical magnetic core 52 is arranged inside the end portion of the extending portion 45b of the magnetic frame 45 opposite to the bottom portion 45a. The magnetic core 52 is located closer to the flow path forming block 44 than the bobbin 51. The outer peripheral surface of the magnetic core 52 is in contact with the inner peripheral surface of the extending portion 45b of the magnetic frame 45. The plunger 49 passes inside the magnetic core 52.

The plunger spring 50 is interposed between the magnetic core 52 and the flange portion 49f of the plunger 49. The first end of the plunger spring 50 is supported by the end face of the magnetic core 52, and the second end of the plunger spring 50 is supported by the flange portion 49f of the plunger 49. The plunger spring 50 urges the plunger 49 in a direction in which the end surface 49e of the plunger 49 is separated from the end surface 48e of the fixed iron core 48.

A bottomed circular hole-shaped accommodating hole 44h is formed on the end surface of the flow path forming block 44 on the opposite side of the solenoid case 43. The axis of the accommodating hole 44h coincides with the axis of the plunger 49. Each body 60 has a columnar plug 54 attached to the accommodating hole 44h. Each plug 54 is attached to each accommodating hole 44h via a sealing member 53, respectively. The plug 54 closes the opening of the accommodating hole 44h. The plug 54 divides the valve chamber 55 in cooperation with the accommodating hole 44h.

A pilot valve body 56 is housed in the valve chamber 55. A first valve seat 57 on which the pilot valve body 56 is seated is formed on the end surface of the plug 54 facing the valve chamber 55. Further, a second valve seat 58 on which the pilot valve body 56 is seated is formed on the bottom surface of the accommodating hole 44h. The pilot valve body 56 can be attached to and detached from the first valve seat 57 and the second valve seat 58. Therefore, the pilot valve body 56 is movably housed in the valve chamber 55 between the first valve seat 57 and the second valve seat 58. The first valve seat 57 and the second valve seat 58 are arranged so as to face each other in the moving direction of the pilot valve body 56 in the valve chamber 55.

In the valve chamber 55, a valve body spring 59 is interposed between the pilot valve body 56 and the plug 54. The valve body spring 59 urges the pilot valve body 56 in a direction in which the pilot valve body 56 is separated from the first valve seat 57. The urging force of the valve body spring 59 is smaller than the urging force of the plunger spring 50.

The plunger 49 has a pair of long plate-shaped valve pressing portions 49a. The pair of valve pressing portions 49a project from the end faces of the plunger 49 opposite to the fixed iron core 48. The pair of valve pressing portions 49a penetrate the flow path forming block 44 and project into the valve chamber 55. The tips of the pair of valve pressing portions 49a are in contact with the pilot valve body 56.

As shown in FIGS. 3 and 4, each flow path forming block 44 has a supply flow path 61, a first output flow path 62, a second output flow path 63, a first discharge flow path 64, and a second discharge flow path. Each has 65. The supply flow path 61 is formed by a first hole 611, a second hole 612, a third hole 613, a groove 614, and a through hole 615. The first hole 611 has a first end opened in the first surface 441 of the flow path forming block 44 and a second end opened in the accommodating hole 44h. The first hole 611 extends straight from the first surface 441 of the flow path forming block 44 toward the accommodating hole 44h and penetrates the flow path forming block 44. The first end of the second hole 612 is opened in the second surface 442 on the side opposite to the first surface 441 in the flow path forming block 44, and the second end is opened in the accommodating hole 44h. The first surface 441 and the second surface 442 extend in parallel with each other. The second hole 612 extends straight from the second surface 442 of the flow path forming block 44 toward the accommodating hole 44h and penetrates the flow path forming block 44.

The groove 614 is formed over the entire circumference of the outer peripheral surface of the plug 54. The first hole 611 and the second hole 612 communicate with each other in the groove 614. The through hole 615 communicates with the groove 614 and extends in the radial direction of the plug 54 to penetrate the plug 54. The third hole 613 has a first end opened in the through hole 615 and a second end opened at the tip of the first valve seat 57. The third hole 613 extends straight from the through hole 615 toward the tip of the first valve seat 57 and penetrates the plug 54. The third hole 613 communicates with the valve chamber 55. Therefore, the supply flow path 61 opens to the first surface 441 and the second surface 442 of the flow path forming block 44 and communicates with the valve chamber 55.

The first discharge flow path 64 is formed by the first hole 641 and the second hole 642. The first hole 641 has a first end opened in the first surface 441 of the flow path forming block 44 and a second end extends to the inside of the flow path forming block 44. The first end of the second hole 642 communicates with the second end of the first hole 641, and the second end opens at the tip of the second valve seat 58. The second hole 642 communicates with the valve chamber 55. Therefore, the first discharge flow path 64 opens to the first surface 441 of the flow path forming block 44 and communicates with the valve chamber 55.

As shown in FIG. 5, the supply flow path 61, the first output flow path 62, and the first discharge flow path 64 are arranged side by side in this order in the moving direction of the pilot valve body 56, respectively. The opening of the supply flow path 61 with respect to the first surface 441 and the opening of the first discharge flow path 64 with respect to the first surface 441 of the pilot valve body 56 with respect to the opening with respect to the first surface 441 of the first output flow path 62. It is located on both sides in the direction of movement.

As shown in FIGS. 4 and 5, in the second output flow path 63, the first end is opened to the first surface 441 of the flow path forming block 44, and the second end is the second surface 442 of the flow path forming block 44. It is formed in the flow path forming block 44 so as to extend toward. The second output flow path 63 extends straight from the first surface 441 toward the second surface 442. The extending direction of the second output flow path 63 is a direction orthogonal to the first surface 441 and the second surface 442. As shown in FIG. 5, the second output flow path 63 and the first surface 441 of the flow path forming block 44 in a direction orthogonal to the moving direction of the pilot valve body 56 with respect to the first discharge flow path 64. It is located on one side of a pair of side surfaces 443 connecting the second surface 442.

As shown in FIGS. 4 and 5, in the second discharge flow path 65, the first end is opened to the first surface 441 of the flow path forming block 44, and the second end is the second surface 442 of the flow path forming block 44. It is formed in the flow path forming block 44 so as to extend toward. The second discharge flow path 65 extends straight from the first surface 441 toward the second surface 442. The extension direction of the second discharge flow path 65 is a direction orthogonal to the first surface 441 and the second surface 442. The second discharge flow path 65 extends in parallel with the second output flow path 63. As shown in FIG. 5, the second discharge flow path 65 is located on the other side of the pair of side surfaces 443 with respect to the first discharge flow path 64.

As shown in FIGS. 4, 6 and 7, each flow path forming block 44 has an output flow path communication recess 66, respectively. The output flow path communication recess 66 overlaps the portion of the second surface 442 of the flow path forming block 44 that overlaps the opening region Z1 that opens in the first surface 441 of the first output flow path 62, and the second output flow path 63. It is recessed in the part including the part. The output flow path communication recess 66 communicates with the second end of the second output flow path 63.

Further, the flow path forming block 44 has a discharge flow path communication recess 67. The discharge flow path communication recess 67 overlaps the portion of the second surface 442 of the flow path forming block 44 that overlaps the opening region Z2 that opens in the first surface 441 of the first discharge flow path 64 and the second discharge flow path 65. It is recessed in the part including the part. The discharge flow path communication recess 67 communicates with the second end of the second discharge flow path 65.

As shown in FIG. 3, the first pilot valve 41 and the second pilot valve 42 are arranged with respect to the casing 11 in a state where the first pilot valve 41 and the second pilot valve 42 are adjacent to each other. The second pilot valve 42 is arranged closer to the first connecting block 13 of the casing 11 than the first pilot valve 41. The first pilot valve 41 and the second pilot valve 42 are arranged close to the first connecting block 13 on the side opposite to the casing main body 12. Therefore, the pilot solenoid valve 10 of the present embodiment is a one-sided solenoid valve in which the first pilot valve 41 and the second pilot valve 42 are arranged close to one side with respect to the casing 11.

The second pilot valve 42 has a state in which the first surface 441 of the flow path forming block 44 of the second pilot valve 42 abuts on the surface of the first connecting block 13 opposite to the casing main body 12 of the first adapter 132. Is arranged for the first adapter 132. Further, the first pilot valve 41 and the second pilot valve 42 have a first surface 441 of the flow path forming block 44 of the first pilot valve 41 and a second surface 442 of the flow path forming block 44 of the second pilot valve 42. Are placed against each other in a state where they are butted against each other. Therefore, the body 60 of the first pilot valve 41 and the body 60 of the second pilot valve 42 have the first surface 441 of the body 60 of the first pilot valve 41 and the second surface 442 of the body 60 of the second pilot valve 42. The first surface 441 of the body 60 of the second pilot valve 42 is arranged so as to be in contact with the casing 11.

Then, as shown in FIG. 4, the supply flow path 61 of the first pilot valve 41 and the supply flow path 61 of the second pilot valve 42 communicate with each other. Further, the output flow path communication recess 66 of the flow path forming block 44 of the second pilot valve 42 communicates with the first output flow path 62 of the first pilot valve 41. Therefore, the first output flow path 62 of the first pilot valve 41 communicates with the second output flow path 63 of the second pilot valve 42 via the output flow path communication recess 66 of the second pilot valve 42. Further, the discharge flow path communication recess 67 of the flow path forming block 44 of the second pilot valve 42 communicates with the first discharge flow path 64 of the first pilot valve 41. Therefore, the first discharge flow path 64 of the first pilot valve 41 communicates with the second discharge flow path 65 of the second pilot valve 42 via the discharge flow path communication recess 67 of the second pilot valve 42. Therefore, a plurality of flow paths through which the pilot fluid flows are formed in the body 60 of the first pilot valve 41 and the body 60 of the second pilot valve 42. The plurality of flow paths include a flow path that opens on the second surface 442 of the body 60 of the first pilot valve 41 and the body 60 of the second pilot valve 42.

As shown in FIG. 3, the portion of the supply flow path 61 of the first pilot valve 41 that opens to the second surface 442, the output flow path communication recess 66 and the discharge flow path communication recess 67 of the first pilot valve 41 are fixed clips. It is blocked by 70. The portion of the supply flow path 61 of the first pilot valve 41 that opens to the second surface 442, the output flow path communication recess 66 and the discharge flow path communication recess 67 of the first pilot valve 41 are outside the pilot solenoid valve 10. It is a flow path of the pilot fluid that opens in.

As shown in FIG. 8, the fixing clip 70 is made of metal. The fixing clip 70 has a pair of extending portions 70a, a closing portion 70b, a connecting portion 70c, and a bent portion 70d. The connecting portion 70c has a long square flat plate shape. The pair of extending portions 70a have an elongated thin plate shape extending in parallel with each other. The connecting portion 70c is in the shape of a thin plate that connects the first ends of the pair of extending portions 70a located in the longitudinal direction. The first end of the pair of extending portions 70a located in the longitudinal direction is connected to the end portion of the connecting portion 70c located in the longitudinal direction. The connecting portion 70c is connected to the pair of extending portions 70a so as to be orthogonal to the pair of extending portions 70a. The direction in which the pair of extension portions 70a extends from the connection portion 70c is defined as the first direction A, the direction in which the connection portion 70c extends between the pair of extension portions 70a is defined as the second direction B, and the first direction A and the second direction. The direction orthogonal to B is defined as the third direction C. Locking holes 70h as locked portions are provided at the ends of each extending portion 70a on the opposite side of the connecting portion 70c. The locking hole 70h is a circular hole-shaped through hole that penetrates the extending portion 70a in the plate thickness direction.

The length of the connecting portion 70c extends in the second direction B, and the short end extends in the third direction C. The bent portion 70d has a curved plate shape. The bent portion 70d extends from the first end of the connecting portion 70c in the third direction C. The bent portion 70d partially protrudes from the virtual surface Vp extending along the plate surface 70i located on the opposite side of the pair of extending portions 70a in the connecting portion 70c to the side opposite to the pair of extending portions 70a. Is formed in. The bent portion 70d is bent toward between the pair of extending portions 70a. The bent portion 70d is bent in an arc shape. The closed portion 70b has a plate shape. The closed portion 70b extends from the end portion of the bent portion 70d opposite to the connecting portion 70c toward between the pair of extending portions 70a. The closing portion 70b is arranged between the pair of extending portions 70a. The tip of the closed portion 70b is located outside the second end of the connecting portion 70c in the third direction C. Note that FIG. 8 shows a first state in which the fixing clip 70 is in a state before being fixed to the casing 11.

As shown in FIG. 9, a first guide groove 71a is formed on each of the pair of side surfaces 443 of each flow path forming block 44. The pair of first guide grooves 71a extend in parallel with each other. The pair of first guide grooves 71a extend from the first surface 441 to the second surface 442. A second guide groove 71b connected to each first guide groove 71a is formed on each side surface of the first adapter 132 connected to each of the pair of side surfaces 443 of the flow path forming block 44 of the second pilot valve 42. The first guide groove 71a and the second guide groove 71b are located on the same plane as each other.

As shown in FIG. 5, the pair of first guide grooves 71a with respect to the opening for the first surface 441 in the supply flow path 61 and the first surface 441 in the first output flow path 62 when viewed from the first surface 441. It is located across the opening.

As shown in FIG. 9, each second guide groove 71b is provided with a columnar locking projection 71f as a locking portion to be locked to the locking hole 70h. The portion of the outer surface of the locking projection 71f opposite to the body 60 of the second pilot valve 42 has an arc shape that follows the inner surface of the locking hole 70h.

As shown in FIG. 10, the portion of the outer surface of the locking projection 71f on the body 60 side of the second pilot valve 42 has a tapered surface 71g. The tapered surface 71g is inclined so that the amount of protrusion of the locking projection 71f increases toward the first adapter 132 from the body 60 side of the second pilot valve 42.

As shown in FIG. 11, with the first pilot valve 41 and the second pilot valve 42 adjacent to each other, the pair of extending portions 70a have a pair of second guide grooves via the pair of first guide grooves 71a. Guided by 71b, each locking hole 70h is locked to each locking projection 71f. That is, the first guide groove 71a and the second guide groove 71b form a guide groove for guiding the pair of extending portions 70a. In this way, each locking hole 70h is locked to each locking projection 71f, and the pair of extending portions 70a are fixed to the first adapter 132, whereby the fixing clip 70 is fixed to the casing 11.

As shown in FIG. 5, the pair of extending portions 70a have an opening for the first surface 441 in the supply flow path 61 and a first surface 441 in the first output flow path 62 when viewed from the first surface 441. It is located across the opening.

As shown in FIG. 3, the closing portion 70b of the fixing clip 70 is in contact with the second surface 442 of the flow path forming block 44 of the first pilot valve 41. The closing portion 70b closes the supply flow path 61, the output flow path communication recess 66, and the discharge flow path communication recess 67 that open in the second surface 442 of the flow path forming block 44 of the first pilot valve 41. The first pilot valve 41 and the second pilot valve 42 are sandwiched between the closing portion 70b of the fixing clip 70 and the first adapter 132 by fixing the pair of extending portions 70a to the first adapter 132. In this state, it is fixed to the first adapter 132 by the fixing clip 70. Therefore, the fixing clip 70 fixes the first pilot valve 41 and the second pilot valve 42 to the casing 11. Further, the closing portion 70b is a state in which the first pilot valve 41 and the second pilot valve 42 are sandwiched in cooperation with the casing 11 by fixing the pair of extending portions 70a to the casing 11. The flow path that opens to the second surface 442 of the body 60 of the body 60 is closed. Note that FIG. 3 shows a second state in which the first pilot valve 41 valve and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70.

Next, the first state and the second state of the fixed clip 70 will be described.
As shown in FIG. 12A, in the first state, the closing portion 70b of the fixing clip 70 is separated from the connecting portion 70c. In the first state, the distance D1 between the closed portion 70b and the connecting portion 70c gradually increases as the distance D1 separates from the bent portion 70d in the third direction C. That is, in the first state, the closed portion 70b is in an inclined state.

As shown in FIG. 12B, in the second state, the closing portion 70b of the fixing clip 70 is closer to the connecting portion 70c than in the first state. Further, even in the second state, the closed portion 70b is separated from the connecting portion 70c. That is, in the second state, the distance D2 between the closed portion 70b and the connecting portion 70c is smaller than the distance D1 between the closed portion 70b and the connecting portion 70c in the first state. In the second state, the closed portion 70b and the connecting portion 70c are parallel to each other. That is, the distance between the closing portion 70b and the connecting portion 70c is constant over the entire space between the closing portion 70b and the connecting portion 70c.

As shown in FIGS. 12 (a) and 12 (b), the closing portion 70b of the fixing clip 70 is located on the side opposite to the connecting portion 70c of the bent portion 70d in the transition from the first state to the second state. Since it is deformed starting from the end portion, a restoring force for returning to the first state acts on the closed portion 70b. Therefore, since the spring structure is formed by the bent portion 70d, the closing portion 70b is pressed against the second surface 442 of the body 60 of the first pilot valve 41 in the second state. Therefore, the bent portion 70d functions as an urging portion that imparts an urging force for urging the closing portion 70b toward the second surface 442 of the body 60 of the first pilot valve 41.

As shown in FIG. 3, the second surface 442 of the flow path forming block 44 of the first pilot valve 41, the first surface 441 of the flow path forming block 44 of the first pilot valve 41, and the flow path forming of the second pilot valve 42. Gaskets 72 are arranged between the second surface 442 of the block 44 and between the first surface 441 of the flow path forming block 44 of the second pilot valve 42 and the casing 11.

The gasket 72 arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 is pressed against the flow path forming block 44 of the first pilot valve 41 by the closing portion 70b of the fixing clip 70. Therefore, the surface of the closing portion 70b of the fixing clip 70 on the side of the pair of extending portions 70a is a pressing surface for pressing the gasket 72 against the flow path forming block 44 of the first pilot valve 41. The gasket 72 provided between the closing portion 70b and the second surface 442 of the body 60 of the first pilot valve 41 is the second surface 442 of the closing portion 70b and the body 60 of the first pilot valve 41. It is a sealing member that seals between.

As shown in FIGS. 5 and 6, the gasket 72 has a first gasket hole 72a, a second gasket hole 72b, a third gasket hole 72c, a fourth gasket hole 72d, and a fifth gasket hole 72e. The first gasket hole 72a surrounds the opening of the supply flow path 61 when the first surface 441 is viewed in a plan view. The second gasket hole 72b surrounds the opening of the first output flow path 62 when the first surface 441 is viewed in a plan view. The third gasket hole 72c surrounds the opening of the first discharge flow path 64 when the first surface 441 is viewed in a plan view. The fourth gasket hole 72d surrounds the opening of the second output flow path 63 when the first surface 441 is viewed in a plan view. The fifth gasket hole 72e surrounds the opening of the second discharge flow path 65 when the first surface 441 is viewed in a plan view.

The gasket 72 arranged between the first surface 441 of the flow path forming block 44 of the second pilot valve 42 and the casing 11 is the supply flow path 61 and the first of the second pilot valve 42 on the first surface 441 side. Seal between the output flow path 62, the second output flow path 63, the first discharge flow path 64, and the second discharge flow path 65, respectively. The gasket 72 arranged between the first surface 441 of the flow path forming block 44 of the first pilot valve 41 and the second surface 442 of the flow path forming block 44 of the second pilot valve 42 is on the first surface 441 side. Seals between the supply flow path 61, the first output flow path 62, the second output flow path 63, the first discharge flow path 64, and the second discharge flow path 65 of the first pilot valve 41. Further, the gasket 72 arranged between the first surface 441 of the flow path forming block 44 of the first pilot valve 41 and the second surface 442 of the flow path forming block 44 of the second pilot valve 42 has a second surface. On the 442 side, seal between the supply flow path 61, the output flow path communication recess 66, and the discharge flow path communication recess 67 of the second pilot valve 42. The gasket 72 arranged between the second surface 442 of the flow path forming block 44 of the first pilot valve 41 and the closing portion 70b of the fixing clip 70 is the supply flow of the first pilot valve 41 on the second surface 442 side. Seal between the path 61, the output flow path communication recess 66, and the discharge flow path communication recess 67, respectively.

As shown in FIG. 1, the casing 11 is formed with a pilot fluid supply flow path 73 that communicates with the supply port 17 via the valve hole 16. The pilot fluid supply flow path 73 is opened in the valve hole 16 at a position communicating with the supply port 17 regardless of the position of the spool valve body 15. The pilot fluid supply flow path 73 is connected to the supply flow path 61 of the second pilot valve 42.

Further, the casing 11 is formed with a pilot fluid output flow path 74 that connects the first output flow path 62 of the second pilot valve 42 and the second pilot pressure action chamber 38. For convenience of illustration, the specific path of the pilot fluid output flow path 74 is not shown. Further, the casing 11 is formed with a pilot fluid discharge flow path 75 that communicates with the first discharge flow path 64 of the second pilot valve 42. The flow path of the pilot fluid discharge flow path 75 opposite to the second pilot valve 42 is a flow path that opens to the end surface of the first connecting block 13 on the casing body 12 side and a first facing surface of the first connecting block 13. It branches into a flow path that opens in 13a.

As shown in FIGS. 1 and 7, the casing 11 is formed with a pilot fluid output flow path 76 that connects the second output flow path 63 of the second pilot valve 42 and the first pilot pressure action chamber 34. .. Further, the casing 11 is formed with a pilot fluid discharge flow path 77 that communicates with the second discharge flow path 65 of the second pilot valve 42. The end of the pilot fluid discharge flow path 77 opposite to the second discharge flow path 65 of the second pilot valve 42 communicates with the pilot fluid discharge flow path 75. For convenience of illustration, the specific paths of the pilot fluid output flow path 76 and the pilot fluid discharge flow path 77 are not shown.

As shown in FIG. 1, a pilot fluid discharge flow path 78 is formed in the second connecting block 14 of the casing 11. The pilot fluid discharge flow path 78 is branched into a flow path that opens at the end surface of the second connecting block 14 on the casing body 12 side and a flow path that opens at the second facing surface 14a of the second connecting block 14. In the pilot fluid discharge flow path 78, for example, the first pilot valve 41 and the second pilot valve 42 are arranged so as to be opposite to the casing main body 12 with respect to the second connecting block 14, and the second pilot valve is arranged. When the 42 is arranged closer to the second connecting block 14 than the first pilot valve 41, it communicates with the first discharge flow path 64 of the second pilot valve 42.

As shown in FIGS. 1 and 2, the manifold block MB includes a block supply flow path 81, a first block output flow path 82, a second block output flow path 83, a first block discharge flow path 84, and a second block. The discharge flow path 85 is formed. The block supply flow path 81, the first block output flow path 82, the second block output flow path 83, the first block discharge flow path 84, and the second block discharge flow path 85 are open to the mounting surface B1. The end of the block supply flow path 81 that opens to the mounting surface B1 communicates with the supply port 17. The end of the first block output flow path 82 that opens to the mounting surface B1 communicates with the first output port 18. The end of the second block output flow path 83 that opens to the mounting surface B1 communicates with the second output port 19. The end of the first block discharge flow path 84 that opens to the mounting surface B1 communicates with the first discharge port 20. The end of the second block discharge flow path 85 that opens to the mounting surface B1 communicates with the second discharge port 21.

The end of the block supply flow path 81 opposite to the mounting surface B1 is connected to a fluid supply source (not shown) via, for example, a pipe. The end of the first block output flow path 82 opposite to the mounting surface B1 and the end of the second block output flow path 83 opposite to the mounting surface B1 are shown, for example, via piping or the like. Not connected to fluid pressure equipment. The end of the first block discharge flow path 84 opposite to the mounting surface B1 and the end of the second block discharge flow path 85 opposite to the mounting surface B1 are connected to the atmosphere, for example, via piping or the like. Communicate with.

Further, the manifold block MB is formed with a first block side pilot fluid discharge flow path 86 and a second block side pilot fluid discharge flow path 87. The first end of the pilot fluid discharge flow path 86 on the first block side opens in a portion of the mounting surface B1 facing the first facing surface 13a of the first connecting block 13 and communicates with the pilot fluid discharge flow path 75. ing. The second end of the first block side pilot fluid discharge flow path 86 communicates with the first block discharge flow path 84. The first end of the pilot fluid discharge flow path 87 on the second block side opens at a portion of the mounting surface B1 facing the second facing surface 14a of the second connecting block 14 and communicates with the pilot fluid discharge flow path 78. is doing. The second end of the second block side pilot fluid discharge flow path 87 communicates with the second block discharge flow path 85.

A block-side gasket 88 is provided between the mounting surface B1 of the manifold block MB and the casing main body 12. The block-side gasket 88 seals between the mounting surface B1 of the manifold block MB and the casing main body 12.

A first check valve 89a is attached to the first end of the pilot fluid discharge flow path 86 on the first block side. The first check valve 89a opens when the pressure in the first check valve 89a reaches a predetermined pressure, and the flow of fluid flowing from the pilot fluid discharge flow path 75 toward the first block side pilot fluid discharge flow path 86. Tolerate. Further, the first check valve 89a is closed when the pressure in the first check valve 89a is smaller than a predetermined pressure, and the fluid from the first block side pilot fluid discharge flow path 86 to the pilot fluid discharge flow path 75. Block the flow of.

A second check valve 89b is attached to the first end of the pilot fluid discharge flow path 87 on the second block side. The second check valve 89b opens when the pressure in the second check valve 89b reaches a predetermined pressure, and the flow of fluid flowing from the pilot fluid discharge flow path 78 toward the second block side pilot fluid discharge flow path 87. Tolerate. Further, the second check valve 89b is closed when the pressure in the second check valve 89b is smaller than a predetermined pressure, and the fluid from the second block side pilot fluid discharge flow path 87 to the pilot fluid discharge flow path 78. Block the flow of.

As shown in FIG. 1, the first pilot valve 41 has a first connection terminal 91. The first connection terminal 91 is electrically connected to the coil 47 of the solenoid 46 of the first pilot valve 41. The first connection terminal 91 projects from the end surface of the solenoid case 43 of the first pilot valve 41 opposite to the flow path forming block 44. Further, the second pilot valve 42 has a second connection terminal 92. The second connection terminal 92 is electrically connected to the coil 47 of the solenoid 46 of the second pilot valve 42. The second connection terminal 92 projects from the end surface of the solenoid case 43 of the second pilot valve 42 opposite to the flow path forming block 44.

The manifold block MB has a circuit board 93, a first terminal 94, and a second terminal 95. Power is supplied to the circuit board 93 from an external control device such as a programmable logic controller (PLC). The first terminal 94 and the second terminal 95 are electrically connected to the circuit board 93. The first connection terminal 91 is configured such that the pilot solenoid valve 10 is mounted on the mounting surface B1 of the manifold block MB and at the same time connected to the first terminal 94. Further, in the second connection terminal 92, the pilot solenoid valve 10 is mounted on the mounting surface B1 of the manifold block MB, and at the same time, is connected to the second terminal 95. In the solenoid valve manifold of the present embodiment, the first pilot valve 41 and the second pilot valve 42 are assembled to the manifold block MB, and at the same time, the first connection terminal 91 of the first pilot valve 41 and the second pilot valve 42 are second. The connection terminal 92 has a plug-in structure in which the connection terminal 92 is connected to the first terminal 94 and the second terminal 95 of the manifold block MB, respectively.

Next, the operation of this embodiment will be described.
As shown in FIG. 3, for example, the supply of electric power from the circuit board 93 to the coil 47 of the solenoid 46 of the first pilot valve 41 via the first terminal 94 and the first connection terminal 91 is cut off, and the circuit It is assumed that electric power is supplied from the substrate 93 to the coil 47 of the solenoid 46 of the second pilot valve 42 via the second terminal 95 and the second connection terminal 92.

In this case, the coil 47 of the second pilot valve 42 is excited, and a magnetic flux passing through the magnetic frame 45, the fixed iron core 48, the plunger 49, and the magnetic core 52 is generated around the coil 47. Then, an attractive force is generated in the fixed iron core 48 by the exciting action of the coil 47, the plunger 49 is attracted to the fixed iron core 48 against the urging force of the plunger spring 50, and the pilot valve body 56 of the second pilot valve 42 The urging force of the valve body spring 59 moves in a direction away from the first valve seat 57 and is seated on the second valve seat 58.

As a result, the supply flow path 61 and the first output flow path 62 of the second pilot valve 42 communicate with each other via the valve chamber 55, and the first output flow path 62 and the first discharge flow path via the valve chamber 55. Communication with 64 is cut off. Then, the compressed fluid from the fluid supply source passes through the pilot fluid supply flow path 73, the supply flow path 61 of the second pilot valve 42, the valve chamber 55, the first output flow path 62, and the pilot fluid output flow path 74. Is supplied as a pilot fluid to the second pilot pressure action chamber 38.

On the other hand, power is not supplied to the coil 47 of the solenoid 46 of the first pilot valve 41, and in the first pilot valve 41, the attractive force of the fixed iron core 48 due to the exciting action of the coil 47 is extinguished. As a result, the plunger 49 moves in a direction away from the fixed iron core 48 due to the urging force of the plunger spring 50. Then, the pilot valve body 56 of the first pilot valve 41 is pressed toward the first valve seat 57 against the urging force of the valve body spring 59 by the pair of valve pressing portions 49a of the plunger 49, and the first valve is pressed. Sit on the seat 57.

As a result, the first output flow path 62 and the first discharge flow path 64 of the first pilot valve 41 communicate with each other via the valve chamber 55, and the supply flow path 61 and the first output flow path via the valve chamber 55. Communication with 62 is cut off. The pilot fluid in the first pilot pressure action chamber 34 is the pilot fluid output flow path 76, the second output flow path 63 of the second pilot valve 42, the output flow path communication recess 66, and the first output flow of the first pilot valve 41. It is discharged to the pilot fluid discharge flow path 77 via the passage 62, the valve chamber 55, the first discharge flow path 64, the discharge flow path communication recess 67 of the second pilot valve 42, and the second discharge flow path 65. The pilot fluid discharged to the pilot fluid discharge flow path 77 is sent to the atmosphere via the pilot fluid discharge flow path 75, the first check valve 89a, the first block side pilot fluid discharge flow path 86, and the first block discharge flow path 84. Is discharged to.

In this way, the pilot fluid is discharged from the first pilot pressure acting chamber 34 by the first pilot valve 41, and the pilot fluid is supplied to the second pilot pressure acting chamber 38 by the second pilot valve 42. The spool valve body 15 moves toward the first piston accommodating recess 31. As a result, the supply port 17 and the second output port 19 communicate with each other, and the first output port 18 and the first discharge port 20 communicate with each other. Further, the supply port 17 and the first output port 18 are sealed by the first spool packing 26 of the first valve portion 151, and the fourth valve is between the second output port 19 and the second discharge port 21. It is sealed by the fourth spool packing 29 of the portion 154.

When the spool valve body 15 moves toward the first piston accommodating recess 31, the pilot fluid is discharged into the space of the first piston accommodating recess 31 opposite to the first piston pressure acting chamber 34. The fluid in the flow path 75 flows in between the first connecting block 13 and the casing main body 12. Further, when the spool valve body 15 moves toward the first piston accommodating recess 31, the fluid in the space on the side opposite to the second pilot pressure acting chamber 38 from the second piston 36 in the second piston accommodating recess 35 becomes available. It flows into the pilot fluid discharge flow path 78 through the space between the second connecting block 14 and the casing main body 12.

Then, the fluid from the fluid supply source is supplied to the fluid pressure device via the block supply flow path 81, the supply port 17, the second output port 19, and the second block output flow path 83. Further, the fluid from the fluid pressure device is discharged to the atmosphere through the first block output flow path 82, the first output port 18, the first discharge port 20, and the first block discharge flow path 84.

For example, power is supplied from the circuit board 93 to the coil 47 of the solenoid 46 of the first pilot valve 41 via the first terminal 94 and the first connection terminal 91, and the second terminal from the circuit board 93. It is assumed that the power supply to the coil 47 of the solenoid 46 of the second pilot valve 42 via the 95 and the second connection terminal 92 is cut off.

In this case, the coil 47 of the first pilot valve 41 is excited, and a magnetic flux passing through the magnetic frame 45, the fixed iron core 48, the plunger 49, and the magnetic core 52 is generated around the coil 47. Then, an attractive force is generated in the fixed iron core 48 by the exciting action of the coil 47, the plunger 49 is attracted to the fixed iron core 48 against the urging force of the plunger spring 50, and the pilot valve body 56 of the first pilot valve 41 is attracted. The urging force of the valve body spring 59 moves in a direction away from the first valve seat 57 and is seated on the second valve seat 58.

As a result, the supply flow path 61 and the first output flow path 62 of the first pilot valve 41 communicate with each other via the valve chamber 55, and the first output flow path 62 and the first discharge flow path via the valve chamber 55. Communication with 64 is cut off. The compressed fluid from the fluid supply source is the pilot fluid supply flow path 73, the supply flow path 61 of the second pilot valve 42, the supply flow path 61 of the first pilot valve 41, the valve chamber 55, and the first output flow path 62. , The pilot fluid is supplied to the first pilot pressure action chamber 34 via the output flow path communication recess 66 of the second pilot valve 42, the second output flow path 63, and the pilot fluid output flow path 76.

On the other hand, power is not supplied to the coil 47 of the solenoid 46 of the second pilot valve 42, and in the second pilot valve 42, the attractive force of the fixed iron core 48 due to the exciting action of the coil 47 is extinguished. As a result, the plunger 49 moves in a direction away from the fixed iron core 48 due to the urging force of the plunger spring 50. Then, the pilot valve body 56 of the second pilot valve 42 is pressed toward the first valve seat 57 against the urging force of the valve body spring 59 by the pair of valve pressing portions 49a of the plunger 49, and the first valve is pressed. Sit on the seat 57.

As a result, the first output flow path 62 and the first discharge flow path 64 of the second pilot valve 42 communicate with each other via the valve chamber 55, and the supply flow path 61 and the first output flow path via the valve chamber 55. Communication with 62 is cut off. The pilot fluid in the second pilot pressure action chamber 38 is the pilot fluid output flow path 74, the first output flow path 62 of the second pilot valve 42, the valve chamber 55, the first discharge flow path 64, and the pilot fluid discharge flow path 75. , The first check valve 89a, the first block side pilot fluid discharge flow path 86, and the first block discharge flow path 84 are discharged to the atmosphere.

In this way, the pilot fluid is supplied to the first pilot pressure action chamber 34 by the first pilot valve 41, and the pilot fluid in the second pilot pressure action chamber 38 is discharged by the second pilot valve 42. The spool valve body 15 moves toward the second piston accommodating recess 35. As a result, the supply port 17 and the first output port 18 communicate with each other, and the second output port 19 and the second discharge port 21 communicate with each other. Further, the supply port 17 and the second output port 19 are sealed by the third spool packing 28 of the third valve portion 153, and the second valve is between the first output port 18 and the first discharge port 20. It is sealed by the second spool packing 27 of the portion 152.

When the spool valve body 15 moves toward the second piston accommodating recess 35, the fluid in the space opposite the first piston 32 to the first pilot pressure acting chamber 34 in the first piston accommodating recess 31 becomes the first. It flows into the pilot fluid discharge flow path 75 through between the connecting block 13 and the casing main body 12. Further, when the spool valve body 15 moves toward the second piston accommodating recess 35, the pilot in the space on the second piston accommodating recess 35 opposite to the second pilot pressure acting chamber 38 than the second piston 36. The fluid in the fluid discharge flow path 78 flows in between the second connecting block 14 and the casing main body 12.

Then, the fluid from the fluid supply source is supplied to the fluid pressure device via the block supply flow path 81, the supply port 17, the first output port 18, and the first block output flow path 82. Further, the fluid from the fluid pressure device is discharged to the atmosphere through the second block output flow path 83, the second output port 19, the second discharge port 21, and the second block discharge flow path 85.

Therefore, the first pilot valve 41 supplies and discharges the pilot fluid to and from the first pilot pressure acting chamber 34. The second pilot valve 42 supplies and discharges the pilot fluid to and from the second pilot pressure acting chamber 38. The first output flow path 62 and the second output flow path 63 supply and discharge the pilot fluid to the first pilot pressure action chamber 34 or the second pilot pressure action chamber 38. Further, the first discharge flow path 64 and the second discharge flow path 65 discharge the pilot fluid of the first pilot pressure action chamber 34 or the second pilot pressure action chamber 38.

The pilot solenoid valve 10 of the present embodiment is an internal pilot type that supplies a part of the fluid supplied to the supply port 17 to the first pilot pressure action chamber 34 and the second pilot pressure action chamber 38. Then, in the pilot solenoid valve 10, the spool valve body 15 reciprocates in the casing 11 by the pilot fluid, so that the communication between the ports is switched.

By the way, the supply flow path 61, the output flow path communication recess 66 and the discharge flow path communication recess 67 of the first pilot valve 41 are in a state of being open to the second surface 442 of the first pilot valve 41. Therefore, in the present embodiment, the portion of the supply flow path 61 of the first pilot valve 41 that opens to the second surface 442 by the closing portion 70b of the fixing clip 70, the output flow path communication recess 66 of the first pilot valve 41, and the discharge flow. The road communication recess 67 is closed. The bent portion 70d of the fixing clip 70 is in a state where the closing portion 70b is pressed against the second surface 442 of the flow path forming block 44 of the first pilot valve 41 by using its own restoring force as an urging force. Therefore, the flow path opened to the second surface 442 of the first pilot valve 41 is blocked by the closing portion 70b of the fixing clip 70, and the flow path is formed between the closing portion 70b and the first pilot valve 41 by the urging force of the bent portion 70d. The gasket 72 is in a compressed state with the second surface 442 of the block 44.

The effect of this embodiment will be described.
(1-1) The flow path that opens to the second surface 442 of the body 60 of the first pilot valve 41, which is the flow path that opens to the outside of the pilot solenoid valve 10, is blocked by the closing portion 70b of the fixing clip 70, and The bent portion 70d presses the closing portion 70b against the second surface 442 of the body 60 of the first pilot valve 41. Therefore, the gasket 72 is compressed between the closing portion 70b and the second surface 442 of the flow path forming block 44 of the first pilot valve 41, so that the pilot fluid can be sent to the outside while ensuring high sealing performance. Leakage can be suppressed. Further, the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70. According to this, for example, as in the case where the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 using screws, a screw insertion hole through which the screw is inserted is formed in the flow path forming block 44. There is no need. Therefore, since the space for forming the screw insertion hole in the flow path forming block 44 can be omitted, the cross-sectional area of the flow path of each flow path can be expanded accordingly. Therefore, it is possible to suppress leakage of the pilot fluid to the outside while ensuring high sealing performance, and it is possible to expand the cross-sectional area of the flow path.

(1-2) The bent portion 70d of the fixing clip 70 has a spring structure. Therefore, in the second state in which the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70, the body of the first pilot valve 41 uses the restoring force acting on the bent portion 70d as an urging force. The closed portion 70b is in close contact with the flow path opened in the second surface 442 of 60. That is, the flow path opened to the second surface 442 of the body 60 of the first pilot valve 41 can be closed more firmly. Therefore, the sealing property of the first pilot valve 41 by the fixed clip 70 can be improved.

(1-3) In order for the closing portion 70b to be pressed against the second surface 442 of the body 60 of the first pilot valve 41, the end of the bent portion 70d located on the opposite side of the connecting portion 70c. It is preferable that the closed portion 70b is deformed so as to rotate from the portion as a starting point.

In that respect, in the present embodiment, since the bent portion 70d is bent in an arc shape, the closed portion 70b tends to rotate when the fixed clip 70 transitions from the first state to the second state. As a result, the restoring force is likely to be generated in the bent portion 70d, so that the flow path opened to the second surface 442 of the body 60 of the first pilot valve 41 can be firmly closed by the closing portion 70b.

(1-4) Since the pair of extending portions 70a have a flat plate shape, the rectangular block-shaped bodies 60 can be brought into surface contact with each body 60 when sandwiched by the pair of extending portions 70a. .. That is, the first pilot valve 41 and the second pilot valve 42 can be stably fixed to the casing 11.

(1-5) Each side surface of the first adapter 132, which is the side surface of the casing 11 connected to each of the pair of side surfaces 443 of each body 60 and the pair of side surface 443s of the body 60 of the second pilot valve 42, has a second surface. A guide groove composed of a guide groove 71a and a second guide groove 71b is provided. Therefore, the pair of extending portions 70a makes it easy to fix the first pilot valve 41 and the second pilot valve 42 to the casing 11.

(1-6) When the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70, the pair of extending portions 70a of the fixing clip 70 and the locking projection 71f of the casing 11 are positioned. It may be in a misaligned state. In that case, even if the locking projection 71f is not fitted in the desired position of the circular locking hole 70h formed in the pair of extending portions 70a, the inner surface of the locking hole 70h of the pair of extending portions 70a is engaged. Since the locking projection 71f moves along the arcuate outer surface of the stop projection 71f, the locking projection 71f moves relatively to a desired position of the locking hole 70h. That is, since the pair of extending portions 70a move to a desired position, the fixed state of the first pilot valve 41 and the second pilot valve 42 with respect to the casing 11 can be stabilized by the fixing clip 70.

(1-7) Of the outer surface of the locking projection 71f, the portion of the second pilot valve 42 on the body 60 side has a tapered surface 71g, so that the locking hole 70h of the pair of extending portions 70a of the fixing clip 70 When the locking projection 71f of the casing 11 is fitted to the casing 11, the pair of extending portions 70a expands so as to be guided by the tapered surface 71g of the locking projection 71f. When the locking projection 71f reaches a position where it overlaps with the locking hole 70h, the locking projection 71f is fitted into the locking hole 70h, and the pair of extending portions 70a are fixed to the casing 11. That is, it is not necessary to expand the pair of extending portions 70a of the fixing clip 70 by itself to fit the locking projection 71f into the locking hole 70h, and the fixing clip 70 can be easily fixed to the casing 11.

(1-8) Since the space for forming the screw insertion hole in the flow path forming block 44 can be omitted, the first pilot valve 41 and the second pilot valve 42 can be miniaturized accordingly.

(1-9) Each flow path forming block 44 of the first pilot valve 41 and the second pilot valve 42 has the same flow path structure. Therefore, in order to supply and discharge the pilot fluid to the first pilot pressure action chamber 34 and to supply and discharge the pilot fluid to the second pilot pressure action chamber 38, two types of flow path forming blocks having different flow path structures are prepared. There is no need to do so, and the production efficiency of the pilot solenoid valve 10 can be improved.

(1-10) When the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 using screws, local strain is generated in the flow path forming block 44 of the first pilot valve 41 due to the fastening force of the screws. This may occur and the sealing performance of the gasket 72 arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 may not be stable.

In that respect, in the present embodiment, since the first pilot valve 41 receives the urging force of the fixing clip 70 on a flat surface by the closing portion 70b, distortion of the flow path forming block 44 of the first pilot valve 41 can be suppressed. Therefore, the sealing property of the gasket 72 arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 is stable.

<Second embodiment>
Hereinafter, a second embodiment in which the pilot solenoid valve is embodied will be described with reference to FIGS. 13 and 14. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 13, unlike the first embodiment, the fixing clip 70 is composed of a pair of extending portions 70a, a connecting portion 70c, and a spring portion 70g. The connecting portion 70c extends in the third direction C. The connecting portion 70c has the same shape as the second surface 442 of the flow path forming block 44 when viewed in a plan view.

The spring portion 70g is provided in each of the pair of extending portions 70a. The spring portions 70g are provided at positions facing each other in the second direction B. The spring portion 70 g extends so as to form a wave shape with respect to the first direction A. The spring portion 70g has a wavy shape by being configured to meander between the first edge portion and the second edge portion of the extension portion 70a in the second direction B. In the first state before the fixing clip 70 is fixed to the casing 11, the interval of the wave of the spring portion 70g in the first direction A is always constant. That is, the spring portion 70g has a portion extending parallel to the third direction C.

As shown in FIG. 14, in the second state in which the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70, the connecting portion 70c of the fixing clip 70 is the first pilot valve 41. It is in contact with the entire surface of the second surface 442 of the flow path forming block 44. The connection portion 70c closes the flow path that opens to the second surface 442 of the flow path forming block 44 of the first pilot valve 41. That is, the connecting portion 70c is a closing portion that closes the flow path that opens to the second surface 442 of the flow path forming block 44 of the first pilot valve 41 in the second state. The first pilot valve 41 and the second pilot valve 42 are sandwiched between the connecting portion 70c of the fixing clip 70 and the first adapter 132 by fixing the pair of extending portions 70a to the first adapter 132. In this state, it is fixed to the first adapter 132 by the fixing clip 70. Therefore, the fixing clip 70 fixes the first pilot valve 41 and the second pilot valve 42 to the casing 11. The gasket 72 arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 is pressed against the flow path forming block 44 of the first pilot valve 41 by the connecting portion 70c of the fixing clip 70.

Further, in the second state, the interval of the wave of the spring portion 70 g in the first direction A is larger than the interval of the spring portion 70 g in the first state.
As shown in FIGS. 13 and 14, in the second state, the interval of the wave of the spring portion 70 g in the first direction A is larger than the interval of the spring portion 70 g in the first state, so that the spring portion 70 g in the second state The length L2 of is longer than the length L1 of the spring portion 70 g in the first state. That is, in the second state, the spring portion 70 g is longer than in the first state.

The operation of this embodiment will be described.
A restoring force that contracts to return to the first state acts on the spring portion 70 g. Therefore, the connecting portion 70c is pressed against the second surface 442 of the flow path forming block 44 of the first pilot valve 41 by the restoring force of the spring portion 70g of the fixing clip 70. That is, the spring portion 70g functions as an urging portion that imparts an urging force for urging the connecting portion 70c to the second surface 442 of the flow path forming block 44 of the first pilot valve 41. Therefore, while the flow path opened to the second surface 442 of the first pilot valve 41 is blocked by the connection portion 70c of the fixing clip 70, the flow path is formed between the closing portion 70b and the first pilot valve 41 by the urging force of the spring portion 70g. The gasket 72 is in a compressed state with the second surface 442 of the block 44.

The effect of this embodiment will be described.
(2-1) The spring portion 70 g of the fixing clip 70 has a spring structure. Therefore, in the second state in which the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70, the body of the first pilot valve 41 uses the restoring force acting on the spring portion 70g as an urging force. The connecting portion 70c is in close contact with the flow path opened in the second surface 442 of 60. That is, the flow path opened to the second surface 442 of the body 60 of the first pilot valve 41 can be closed more firmly. Therefore, the sealing property of the first pilot valve 41 by the fixed clip 70 can be improved.

<Third embodiment>
Hereinafter, a third embodiment in which the pilot solenoid valve is embodied will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 15, a first guide wall 71c is provided on the pair of side surfaces 443 of each body 60 of the first pilot valve 41 and the second pilot valve 42. The first guide wall 71c projects from the edge of each body 60 in the third direction C. The first guide wall 71c has a rectangular plate shape extending in the first direction A. The first guide wall 71c is arranged so as to form a part of the first guide groove 71a. The first guide wall 71c is provided along a portion of the pair of extending portions 70a where the closing portion 70b is located on the side opposite to the direction extending from the bent portion 70d. A second guide wall 71d extending so as to be connected to the first guide wall 71c is provided on each side surface connected to each of the pair of side surfaces 443 of the flow path forming block 44 of the second pilot valve 42 in the first adapter 132. ing. The second guide wall 71d projects from the edge of the first adapter 132 in the third direction C. The second guide wall 71d has a rectangular plate shape extending in the first direction A. The second guide wall 71d is arranged so as to form a part of the second guide groove 71b. The second guide wall 71d is provided along a portion of the pair of extending portions 70a where the closing portion 70b is located on the side opposite to the direction extending from the bent portion 70d. In a state where the first guide wall 71c and the second guide wall 71d are connected, the inner surface of the first guide wall 71c and the inner surface of the second guide wall 71d are flush with each other. Therefore, on each side surface of the casing 11 connected to each of the pair of side surfaces 443 of each body 60 and the pair of side surfaces 443 of the body 60 of the second pilot valve 42 by the first guide wall 71c and the second guide wall 71d. A guide wall is configured to guide a portion of the pair of extending portions 70a where the closing portion 70b is located on the side opposite to the direction extending from the bent portion 70d.

The operation of this embodiment will be described.
Consider the case where the fixing clip 70 is fixed to the casing 11. The pair of extension portions 70a of the fixing clip 70 is guided by the first guide wall 71c and the second guide wall 71d at a portion of the pair of extension portions 70a on the side opposite to the direction in which the closing portion 70b extends from the bent portion 70d. To. Before the locking holes 70h of the pair of extending portions 70a of the fixing clip 70 are fitted into the locking projection 71f, the end of the closing portion 70b of the fixing clip 70 opposite to the bent portion 70d is the first pilot valve 41. Abuts against the second surface of the body 60 of. When the fixing clip 70 is moved to the casing 11 side in this state, the closing portion 70b is deformed so as to approach the connecting portion 70c. At this time, the closed portion 70b is deformed so as to rotate starting from the end portion of the bent portion 70d opposite to the connecting portion 70c. Along with this, the pair of extending portions 70a are given a rotational force that rotates from the closing portion 70b to the side opposite to the direction in which the closing portion 70b extends from the bent portion 70d. Here, even if the rotational force is applied to the pair of extending portions 70a, the portion of the pair of extending portions 70a where the closing portion 70b is located on the opposite side of the bending portion 70d is the first portion. It abuts on the guide wall 71c and the second guide wall 71d, and restricts the rotation of the pair of extending portions 70a.

The effect of this embodiment will be described.
(3-1) The rotation of the pair of extending portions 70a due to the restoring force acting on the closing portion 70b can be regulated by the first guide wall 71c and the second guide wall 71d. Therefore, the fixing clip 70 can be more accurately fixed to the casing 11.

(3-2) When the pair of extension portions 70a are guided by the guide wall, the pair of extension portions 70a rotate due to the restoring force acting on the closing portion 70b, and the pair of extension portions 70a with respect to the first direction A. Even if it is in an inclined state, when the locking projection 71f is fitted into the locking hole 70h, the inner surface of the locking hole 70h of the pair of extending portions 70a becomes the arcuate outer surface of the locking projection 71f. Since it moves along, the locking projection 71f moves relatively to the desired position of the locking hole 70h. That is, since the pair of extension portions 70a move to a desired position, when the pair of extension portions 70a are fixed to the casing 11, the inclination of the pair of extension portions 70a with respect to the first direction A can be corrected. can. Therefore, the first guide wall 71c and the second guide wall 71d, the locking projection 71f, and the locking hole 70h improve the mounting accuracy of the fixing clip 70 to the casing 11.

<Fourth Embodiment>
Hereinafter, a fourth embodiment in which the pilot solenoid valve is embodied will be described with reference to FIGS. 16 and 17. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 16, the length of the connecting portion 70c extends in the third direction C, and the short side extends in the second direction B in the shape of a long square plate. At both ends of the connecting portion 70c located in the second direction B, a pair of extending portions 70a are connected to the portions of the connecting portion 70c near the first end located in the third direction C. The second end of the connecting portion 70c located in the third direction C is arranged at a position separated from the pair of extending portions 70a in the third direction C.

In the portion of the connecting portion 70c sandwiched between the pair of extending portions 70a, the plate surface 70i of the connecting portion 70c is formed with a recess 70e recessed in the plate thickness direction of the connecting portion 70c. A screw hole 70f is formed on the bottom surface of the recess 70e. The screw hole 70f penetrates the connection portion 70c in the plate thickness direction. A screw 80 is screwed into the screw hole 70f. The screw 80 has a shaft portion 811 having a columnar shape and having a male screw 811a formed on the outer peripheral surface thereof, and a head portion 812 provided on the first end side of the shaft portion 811.

As shown in FIG. 17A, the screw 80 has an incompletely threaded portion 813. The incompletely threaded portion 813 is integrally formed at the first end of the shaft portion 811. The head 812 is integrally formed with the incompletely threaded portion 813. The incompletely threaded portion 813 has a conical trapezoidal shape. No male screw is formed on the outer peripheral surface of the incompletely threaded portion 813. The outer peripheral surface of the incompletely threaded portion 813 is inclined so as to increase in diameter from the shaft portion 811 toward the head portion 812.

A bent portion 70d is provided at the second end of the connecting portion 70c located in the third direction C. The bent portion 70d is provided on the pair of extending portions 70a side of the virtual surface Vp extending along the plate surface 70i of the connecting portion 70c. That is, the bent portion 70d is bent in an arc shape so as not to protrude from the virtual surface Vp on the side opposite to the pair of extending portions 70a.

The tip of the closed portion 70b is arranged at the same position as the first end of the connecting portion 70c in the third direction C. Note that FIG. 16 shows a first state in which the fixing clip 70 is in a state before being fixed to the casing 11.

As shown in FIG. 17A, in the first state, the closing portion 70b of the fixing clip 70 is separated from the connecting portion 70c. In the first state, the distance D1 between the closed portion 70b and the connecting portion 70c gradually increases as the distance D1 separates from the bent portion 70d in the third direction C. That is, in the first state, the closed portion 70b is in an inclined state.

As shown in FIG. 17B, in the second state, the closing portion 70b of the fixing clip 70 is closer to the connecting portion 70c than in the first state. Further, even in the second state, the closed portion 70b is separated from the connecting portion 70c. That is, in the second state, the distance D2 between the closed portion 70b and the connecting portion 70c is smaller than the distance D1 between the closed portion 70b and the connecting portion 70c in the first state. In the second state, the closed portion 70b and the connecting portion 70c are parallel to each other. That is, the distance between the closing portion 70b and the connecting portion 70c is constant over the entire space between the closing portion 70b and the connecting portion 70c.

As shown in FIGS. 17 (a) and 17 (b), the closed portion 70b of the fixing clip 70 is located on the opposite side of the bent portion 70d from the connecting portion 70c in the transition from the first state to the second state. Since it is deformed starting from the end portion, a restoring force for returning to the first state acts on the closed portion 70b. Therefore, since the spring structure is formed by the bent portion 70d, the closing portion 70b is pressed against the second surface 442 of the body 60 of the first pilot valve 41 in the second state. Therefore, the bent portion 70d functions as an urging portion that imparts an urging force for urging the closing portion 70b toward the second surface 442 of the body 60 of the first pilot valve 41. Further, in the second state, the shaft portion 811 of the screw 80 is inserted into the screw hole 70f. When the shaft portion 811 is inserted into the screw hole 70f, the male screw 811a of the shaft portion 811 is screwed into the screw hole 70f. At this time, the incompletely threaded portion 813 of the screw 80 enters the recess 70e of the connecting portion 70c. That is, the recess 70e functions as a space for the incompletely threaded portion 813 of the screw 80 to escape. When the second end of the shaft portion 811 is in contact with the closed portion 70b, the shaft portion 811 is screwed into the screw hole 70f, so that the axial force of the screw 80 is transmitted to the second surface 442 via the closed portion 70b. Will be done. That is, the axial force of the screw 80 is an urging force that presses the closing portion 70b against the second surface 442.

The operation and effect of this embodiment will be described below.
(4-1) In addition to the urging force of the bent portion 70d, the closing portion 70b can be pressed against the second surface 442 of the body 60 of the first pilot valve 41 by the axial force of the screw 80, so that the pilot fluid Leakage to the outside can be further suppressed.

(4-2) Since the bent portion 70d is configured so as not to protrude from the plate surface on the side opposite to the pair of extending portions 70a of the connecting portion 70c, the fixing clip 70 can be miniaturized and the pilot solenoid valve 10 can be miniaturized. It is possible to suppress the increase in physique.

(4-3) When the screw 80 is inserted into the screw hole 70f, the incomplete screw portion 813 enters the inside of the recess 70e, so that the incomplete screw portion 813 does not interfere with the plate surface 70i of the connection portion 70c and is screwed. 80 can be screwed into the screw hole 70f. Therefore, the axial force of the screw 80 is easily transmitted to the closing portion 70b, and the urging force is easily transmitted to the second surface 442. Therefore, leakage of the pilot fluid to the outside can be further suppressed.

Each of the above embodiments can be modified and implemented as follows. Each of the above embodiments and the following modification examples can be implemented in combination with each other within a technically consistent range.

In the first embodiment, the bent portion 70d functions as an urging portion, and in the second embodiment, the spring portion 70 g functions as an urging portion. For example, the bent portion 70d and the spring portion 70 g function as an urging portion. It may function as a part. In this case, the spring structure is configured by the bent portion 70d and the spring portion 70g of the fixing clip 70. Therefore, in the second state in which the first pilot valve 41 and the second pilot valve 42 are fixed to the casing 11 by the fixing clip 70, the first pilot uses the restoring force acting on the bent portion 70d and the spring portion 70g as an urging force. The closed portion 70b is in close contact with the flow path that opens to the second surface 442 of the body 60 of the valve 41. That is, the flow path opened to the second surface 442 of the body 60 of the first pilot valve 41 can be closed more firmly. Therefore, the sealing property of the first pilot valve 41 by the fixed clip 70 can be improved.

In each of the above embodiments, the tapered surface 71g of the locking projection 71f may be changed to, for example, a vertical surface orthogonal to the side surface of the first adapter 132 of the casing 11. That is, the locking projection 71f may be changed to form a half moon shape when viewed from the third direction C. When this modification is adopted, the protrusion amount of the locking projection 71f may be changed so that the pair of extending portions 70a of the fixing clip 70 can be easily fixed to the casing 11.

-In each of the above embodiments, the locking projection 71f may be changed to a columnar shape. In this case, the portion of the outer surface of the locking projection 71f opposite to the body 60 of the second pilot valve 42 may be arcuate to follow the inner surface of the locking hole 70h, or the inner surface of the locking hole 70h. It may be an arc shape that does not follow. That is, the shape of the locking projection 71f may be changed in any way as long as the fixing clip 70 can be fixed to the casing 11 when the locking projection 71f is fitted into the locking hole 70h.

In each of the above embodiments, if the fixing clip 70 can be fixed to the casing 11 when the locking projection 71f is fitted into the locking hole 70h, the shape of the locking hole 70h is not limited to the circular hole shape. It may be changed to such a shape, for example, it may have a rectangular hole shape.

-In each of the above embodiments, the pair of extending portions 70a have a flat plate shape, but may have a rod shape, for example. Further, the connecting portion 70c has a long square flat plate shape, but in the fourth embodiment, it may have a plate shape. Further, in the first to third embodiments, the connecting portion 70c may have a rod shape. Further, in each of the above embodiments, the bent portion 70d may have a rod shape.

-In each of the above embodiments, the guide groove composed of the first guide groove 71a and the second guide groove 71b may be omitted. In this case, the pair of extending portions 70a of the fixing clip 70 are the pair of side surfaces 443 of the body 60 of the first pilot valve 41 and the second pilot valve 42, and each side surface of the first adapter 132 connected to the pair of side surface 443s. And can be attached to. Further, the locking projection 71f is changed so as to be provided on each side surface connected to the pair of side surface 443s of the first adapter 132.

-In the first embodiment and the third embodiment, the bent portion 70d is bent in an arc shape, but the present invention is not limited to this. For example, the bent portion 70d has a first extending portion extending outward in the third direction C from one of both edges located in the third direction C of the connecting portion 70c, and a connecting portion 70c of the first extending portion. A pair of a second extending portion extending from an end located on the opposite side to the connecting portion 70c toward the opposite side and an end located on the opposite side of the first extending portion of the second extending portion. It may be composed of a third extending portion which is bent toward between the extending portions 70a of the above. That is, the bent portion 70d may be configured to have a U-shaped cross section when viewed from the second direction B. Further, the shape of the bent portion 70d may be changed to any shape as long as it can generate an urging force for pressing the closing portion 70b toward the second surface 442 of the body 60 of the first pilot valve 41. good.

-In the first embodiment and the third embodiment, the closed portion 70b is separated from the connecting portion 70c even in the second state, but the present invention is not limited to this. For example, the closed portion 70b may be changed to come into contact with the connecting portion 70c in the second state. In short, in at least the first state of the first state and the second state, the closed portion 70b may be separated from the connecting portion 70c.

-In the third embodiment, the guide wall may be composed of only the first guide wall 71c. Further, for example, the guide wall may be formed by the first guide wall 71c provided on the pair of side surfaces 443 of the first pilot valve 41 and the second guide wall 71d.

In each of the above embodiments, the flow path forming blocks 44 of the first pilot valve 41 and the second pilot valve 42 have a first discharge flow path 64, a second discharge flow path 65, and a discharge flow path communication recess 67. It may not be configured. The first pilot valve 41 and the second pilot valve 42 each have a flow path forming block 44 having a discharge flow path that opens to the first surface 441 and the second surface 442 and communicates with the valve chamber 55. It may be a configuration.

In each of the above embodiments, for example, the gasket 72 arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 is the first surface 441 of the flow path forming block 44 of the first pilot valve 41. It may be a gasket having a different shape from the gasket 72 arranged between the second surface 442 of the flow path forming block 44 of the second pilot valve 42. In short, the gasket arranged on the second surface 442 of the flow path forming block 44 of the first pilot valve 41 is the supply flow path 61, the output flow path communication recess 66, and the discharge flow path communication recess on the second surface 442 side. 67 Any shape may be used as long as it can seal between each of them.

-In each of the above embodiments, the fixing clip 70 may be made of, for example, resin.
-In each of the above embodiments, the flow path forming blocks 44 of the first pilot valve 41 and the second pilot valve 42 have the same flow path structure, but the present invention is not limited to this, and the first pilot valve 41 and the second pilot valve 42 are not limited to this. Each flow path forming block 44 of the pilot valve 42 may have a different flow path structure. Even with this change, for example, if there is a flow path that opens on the second surface 442 of the body 60 of the first pilot valve 41, it can be closed by the fixing clip 70 in each of the above embodiments and the above modification. ..

In each of the above embodiments, the main valve portion V1 of the pilot solenoid valve 10 may be, for example, a dual 3-port type directional control valve in which two spool valve bodies are housed in a valve hole 16. .. The two spool valve bodies are independent of each other by supplying and discharging the pilot fluid to the first pilot pressure acting chamber 34 in the first pilot valve 41 and supplying and discharging the pilot fluid to the second pilot pressure acting chamber 38 in the second pilot valve 42. And work.

10 ... pilot type electromagnetic valve, 11 ... gasket, 15 ... spool valve body, 17 ... port supply port, 18 ... port first output port, 19 ... port second output port, 20 ... port. 1st discharge port, 21 ... 2nd discharge port, 34 ... 1st pilot pressure action chamber, 38 ... 2nd pilot pressure action chamber, 41 ... 1st pilot valve, 42 ... 2nd pilot valve, 55 ... valve Chamber, 56 ... pilot valve body, 57 ... first valve seat, 58 ... second valve seat, 60 ... body, 61 ... supply flow path, 62 ... first output flow path, 63 ... second output flow path, 64 ... 1st discharge flow path, 65 ... 2nd discharge flow path, 66 ... Output flow path communication recess, 67 ... Discharge flow path communication recess, 70 ... Fixed clip, 70a ... Extension part, 70b ... Closure part, 70c ... Connection part , 70d ... Bent part, 70g ... Spring part, 70h ... Locking hole, 70i ... Plate surface, 71c ... First guide wall, 71d ... Second guide wall, 71f ... Locking protrusion, 71g ... Tapered surface, 72 ... Gasket , 80 ... screw, 441 ... first surface, 442 ... second surface, 443 ... side surface, Z1, Z2 ... opening area, A ... first direction, B ... second direction, C ... third direction, Vp ... virtual surface ..

Claims (10)

A spool valve body that switches communication between the ports by reciprocating in a casing having multiple ports.
A first pilot pressure action chamber and a second pilot pressure action chamber provided on both end sides of the spool valve body in the casing, respectively.
The first pilot valve that supplies and discharges the pilot fluid to the first pilot pressure action chamber,
A second pilot valve for supplying and discharging the pilot fluid to and from the second pilot pressure acting chamber is provided.
The first pilot valve and the second pilot valve are arranged in a state of being connected to each other.
The first pilot valve and the second pilot valve each have a rectangular block-shaped body having a first surface and a second surface opposite to the first surface.
Each of the above bodies
The first surface of the body of the first pilot valve and the second surface of the body of the second pilot valve are in contact with each other, and the first surface of the body of the second pilot valve is attached to the casing. Arranged to abut,
A plurality of flow paths through which the pilot fluid flows are formed in each of the bodies.
The plurality of flow paths are pilot solenoid valves including a flow path that opens to the second surface of each of the bodies.
A fixing clip for fixing the first pilot valve and the second pilot valve to the casing is provided.
The fixing clip is
A pair of extension portions fixed to the casing,
By fixing the pair of extending portions to the casing, the second pilot valve and the second pilot valve are sandwiched between the first pilot valve and the second pilot valve in cooperation with the casing. A closed portion that closes the flow path that opens to the surface, and a closed portion that closes the flow path.
It has an urging portion that imparts an urging force that urges the closing portion toward the second surface of the body of the first pilot valve.
A sealing member for sealing between the closed portion and the second surface of the body of the first pilot valve is arranged between the closed portion and the second surface of the body of the first pilot valve. A pilot solenoid valve characterized by being. The fixing clip is
It has a connecting portion that connects the pair of extending portions to each other, and has a connecting portion.
The urging part
A bent portion that is bent from the connecting portion to the space between the pair of extending portions.
The closed portion has a plate shape extending from an end portion of the bent portion opposite to the connecting portion toward the pair of extending portions and arranged between the pair of extending portions.
When the state before fixing the fixing clip to the casing is the first state and the state where the first pilot valve and the second pilot valve are fixed to the casing by the fixing clip is the second state, at least the first state. The claim is characterized in that, in one state, the closed portion is separated from the connecting portion, and in the second state, the closed portion is closer to the connecting portion than in the first state. Item 1. The pilot solenoid valve according to Item 1. The pair of side surfaces connecting the first surface and the second surface of each body and the pair of sides of the casing connected to each of the pair of side surfaces of the body of the second pilot valve. The pilot solenoid valve according to claim 2, wherein a guide wall is provided to guide a portion of the extension portion of the extension portion to guide a portion of the closure portion located on the side opposite to the direction extending from the bent portion. .. The pilot solenoid valve according to claim 2 or 3, wherein the bent portion is bent in an arc shape. The connection portion is plate-shaped and has a plate shape.
A screw that presses the closed portion against the second surface of the body of the first pilot valve in the second state is screwed into the connecting portion so as to penetrate the connecting portion in the plate thickness direction. The pilot solenoid valve according to any one of claims 2 to 4, wherein the solenoid valve is provided. The connection portion has a flat plate shape and has a flat plate shape.
A claim characterized in that the bent portion is arranged on the side of the pair of extension portions with respect to a virtual surface extending along a plate surface located on the side opposite to the pair of extension portions in the connection portion. Item 5. The pilot solenoid valve according to Item 5. The closed portion has a plate shape that connects the pair of extended portions to each other.
The urging part
A spring portion provided in each of the pair of extension portions and extending so as to form a wave shape with respect to the extension direction of the pair of extension portions.
When the state before fixing the fixing clip to the casing is the first state and the state where the first pilot valve and the second pilot valve are fixed to the casing by the fixing clip is the second state, the second state. The pilot solenoid valve according to claim 1, wherein in the state, the spring portion is extended from the first state. The pilot solenoid valve according to any one of claims 1 to 7, wherein the pair of extending portions have a flat plate shape. The extended portion has a locked portion that is locked to the locking portion of the casing.
The locked portion is a circular hole-shaped through hole penetrating in the plate thickness direction of the extended portion.
The locking portion is a columnar locking projection that protrudes from the side surface of the casing and is fitted into the through hole.
The pilot type according to claim 8, wherein the portion of the outer surface of the locking projection opposite to the body of the second pilot valve has an arc shape that imitates the inner surface of the through hole. solenoid valve. The portion of the outer surface of the locking projection on the body side of the second pilot valve is a tapered surface that is inclined so that the amount of protrusion of the locking projection increases as the distance from the closed portion increases. The pilot solenoid valve according to claim 9.

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