solenoid valve block

Abstract

The present application provides a kind of solenoid valve valve group, with: solenoid valve, with output port;Valve group base, with output flow path;And gasket, between valve group base and solenoid valve between.Gasket has: gasket block, with shaft hole;And manual shaft, is housed in shaft hole.Gasket block has with the output communication flow path of shaft hole communication and makes output flow path and output port each other intercommunication.Manual shaft is configured: by manual operation, so as to be switched to the 1st switching position and the 2nd switching position, the 1st switching position is the position that allows the intercommunication of output flow path and output port via output communication flow path, and the 2nd switching position is the position that blocks the intercommunication of output flow path and output port via output communication flow path.

Description

Technical Field

[0001] This disclosure relates to solenoid valve assemblies. Background Technology

[0002] The solenoid valve assembly includes a solenoid valve and a valve assembly base 3 housing the solenoid valve. A supply flow path, an output flow path, and a discharge flow path are formed in the valve assembly base. The solenoid valve has a valve housing and a valve body. A valve orifice, a supply port, an output port, and a discharge port are formed in the valve housing. The supply port, output port, and discharge port communicate with the valve orifice. The supply port communicates with the supply flow path of the valve assembly base. The output port communicates with the output flow path of the valve assembly base. The discharge port communicates with the discharge flow path of the valve assembly base. The valve body is movably housed in the valve orifice. Movement of the valve body within the valve orifice switches the communication state between the ports, thereby actuating the fluid pressure device connected to the output flow path through the fluid flowing in the output flow path.

[0003] For example, Japanese Utility Model Application Publication No. 61-197364 discloses a solenoid valve assembly with a stop valve between the valve assembly base and the solenoid valve. The stop valve has a valve core that can be switched to a first switching position and a second switching position. When the valve core is switched to the first switching position, communication between the supply port and the supply flow path, between the output port and the output flow path, and between the discharge port and the discharge flow path are permitted. When the valve core is switched to the second switching position, communication between the supply port and the supply flow path and between the discharge port and the discharge flow path are blocked. When the valve core is in the second switching position, communication between the output port and the output flow path is permitted. When the valve core is in the second switching position, since communication between the discharge port and the discharge flow path is blocked, fluid in the output flow path is not discharged to the outside through the output port and the discharge port from the discharge flow path. As a result, the fluid pressure between the output flow path and the fluid pressure device is maintained, and the operation of the fluid pressure device is stopped. With this type of solenoid valve assembly, for example, when an operator is performing maintenance work, the operation of the fluid pressure equipment can be stopped by switching the valve core to the second switching position. Therefore, the operator can safely perform maintenance work. Summary of the Invention

[0004] The problem that the invention aims to solve

[0005] In the solenoid valve assembly described in the aforementioned publication, when the valve core of the stop valve is in the second switching position, communication between the output port and the output flow path is permitted. Therefore, even if the valve core is in the second switching position, the path from the output port to the fluid pressure device is not interrupted. However, when the valve core is in the second switching position, for example, if the solenoid valve body malfunctions, the fluid pressure between the output flow path and the fluid pressure device may also change due to the change in fluid pressure at the output port. When this change in fluid pressure occurs between the output flow path and the fluid pressure device, the fluid pressure between them will not be maintained, and the fluid pressure device may malfunction. As described above, even if the valve core is switched to the second switching position, there is still a possibility of the fluid pressure device malfunctioning; therefore, there is room for improvement in reliability.

[0006] Methods for solving problems

[0007] One aspect of this disclosure is a solenoid valve assembly comprising: a solenoid valve; a valve assembly base on which the solenoid valve is mounted and has a supply flow path, an output flow path, and a discharge flow path; and a gasket disposed between the valve assembly base and the solenoid valve. The solenoid valve comprises: a valve housing having a valve orifice; a valve body movably housed in the valve orifice; and a supply port, an output port, and a discharge port formed in the valve housing and respectively communicating with the valve orifice. The gasket comprises: a gasket block having a shaft hole; and a manual shaft movably housed in the shaft hole. The gasket block comprises: a supply communication flow path communicating with the supply port; a discharge communication flow path communicating with the discharge port; and an output communication flow path communicating with the shaft hole and communicating with the output port. The output flow path is configured such that fluid flowing within the output flow path actuates a fluid pressure device connected to the output flow path. The manual axis is configured to be able to be manually switched to a first switching position and a second switching position. The first switching position is a position that allows the output path through the output connection path to connect with the output port, and the second switching position is a position that blocks the connection between the output path through the output connection path and the output port. Attached Figure Description

[0008] Figure 1 This is a perspective view showing the solenoid valve assembly in the embodiment.

[0009] Figure 2 Is Figure 1 A cross-sectional view of the fluid flow in the solenoid valve assembly is shown when the manual shaft is in the first switching position.

[0010] Figure 3 Is Figure 1 In the solenoid valve assembly, an enlarged cross-sectional view of the gasket is shown when the manual shaft is in the first switching position.

[0011] Figure 4 Is Figure 1 A cross-sectional view of the fluid flow is shown in the solenoid valve assembly when the manual shaft is in the second switching position.

[0012] Figure 5 Is Figure 1 In the solenoid valve assembly, an enlarged cross-sectional view of the gasket is shown when the manual shaft is in the second switching position.

[0013] Figure 6 Is Figure 1 A perspective view of a portion of the gasket is shown in the solenoid valve assembly.

[0014] Figure 7 Is Figure 1 A perspective view schematically showing the padlock mounted on the gasket in the solenoid valve assembly.

[0015] Figure 8 This is a perspective view showing a solenoid valve assembly in another embodiment. Detailed Implementation

[0016] The following is based on Figures 1 to 7 One embodiment of the specific solenoid valve assembly will be described.

[0017] <Overall Structure of Solenoid Valve Assembly 10>

[0018] like Figure 1 As shown, the solenoid valve assembly 10 includes multiple solenoid valves 11, a square block-shaped valve assembly base 20, and multiple gaskets 30. The solenoid valves 11 are arranged side by side in a row. Each gasket 30 is located between the valve assembly base 20 and one solenoid valve 11. With each gasket 30 positioned between its corresponding solenoid valve 11 and the valve assembly base 20, the gaskets 30 are arranged side by side in the same direction as the solenoid valves 11. In the following description, the side-by-side direction of the gaskets 30 will be referred to as "side-by-side direction Y1".

[0019] Each solenoid valve 11 is mounted on the mounting surface 20a of the valve assembly base 20 via a corresponding gasket 30. Therefore, the valve assembly base 20 mounts each solenoid valve 11. The solenoid valve 11, together with the valve assembly base 20 and the corresponding gasket 30, constitute the solenoid valve assembly 10.

[0020] <Structure of Solenoid Valve 11>

[0021] like Figure 2As shown, each solenoid valve 11 has an elongated rectangular block-shaped valve body 12. The valve body 12 has an elongated rectangular block-shaped housing body 13, a first connecting block 14, and a second connecting block 15. The housing body 13 is, for example, made of aluminum alloy. The first connecting block 14 and the second connecting block 15 are, for example, made of synthetic resin material. The housing body 13 has a body-facing surface 13a that faces the gasket 30. The first connecting block 14 is connected to a first end of the housing body 13 in the longitudinal direction. The second connecting block 15 is connected to a second end of the housing body 13 in the longitudinal direction.

[0022] <Regarding valve hole 16>

[0023] A circular valve hole 16 is formed in the housing body 13. Therefore, a valve hole 16 is formed in the valve housing 12. The valve hole 16 extends along the length of the housing body 13. A first end of the valve hole 16 opens to a first end face along the length of the housing body 13. A second end of the valve hole 16 opens to a second end face along the length of the housing body 13. Thus, the valve hole 16 penetrates the housing body 13 along its length. A slide valve 17, serving as a valve body, is housed within the valve hole 16 in a state where it can reciprocate within the valve hole 16. Therefore, the slide valve 17 is movably housed within the valve hole 16.

[0024] The housing body 13 has a supply port P1, a first output port A1, a second output port A2, a first discharge port R1, and a second discharge port R2, each communicating with the valve port 16. Therefore, the solenoid valve 11 has a supply port P1, a first output port A1, a second output port A2, a first discharge port R1, and a second discharge port R2 formed in the valve housing 12 and communicating with the valve port 16. The first output port A1 and the second output port A2 are output ports formed in the valve housing 12. The first discharge port R1 and the second discharge port R2 are discharge ports formed in the valve housing 12. The solenoid valve 11 of this embodiment is a 5-port solenoid valve.

[0025] The first discharge port R1, the first output port A1, the supply port P1, the second output port A2, and the second discharge port R2 are arranged in this order from the first end to the second end along the length of the housing body 13. The first end of each of the supply port P1, the first output port A1, the second output port A2, the first discharge port R1, and the second discharge port R2 communicates with the valve port 16. The second end of each of the supply port P1, the first output port A1, the second output port A2, the first discharge port R1, and the second discharge port R2 opens into the main body opposing surface 13a of the housing body 13.

[0026] <Regarding Piston 18 and Piston 29>

[0027] Each solenoid valve 11 has a first piston 18 and a second piston 19. The first piston is in the shape of a circular plate. The first piston 18 is connected to the first end of the slide valve 17. The first piston 18 moves integrally with the slide valve 17. The second piston 19 is in the shape of a circular plate. The second piston 19 is connected to the second end of the slide valve 17. The second piston 19 moves integrally with the slide valve 17.

[0028] <Regarding Pilot Chamber 14c and Pilot Chamber 2 15c>

[0029] A first piston receiving recess 14b, shaped like a circular hole, is formed in the first connecting block 14. The first piston 18 is reciprocally housed in the first piston receiving recess 14b. The first pilot pressure chamber 14c is separated from the first piston 18 by the first piston receiving recess 14b. Pilot fluid is supplied to the first pilot pressure chamber 14c.

[0030] A second piston receiving recess 15b, shaped like a circular hole, is formed in the second connecting block 15. The second piston 19 is reciprocally housed in the second piston receiving recess 15b. The second pilot pressure chamber 15c is separated from the second piston 19 by the second piston receiving recess 15b. Pilot fluid is supplied to the second pilot pressure chamber 15c.

[0031] Solenoid valve 11 has a first pilot valve V1 and a second pilot valve V2. Therefore, solenoid valve 11 is a double-spindle type pilot-operated solenoid valve. The voltage applied to the first pilot valve V1 and the second pilot valve V2 is, for example, performed by an external control device such as a programmable logic controller (PLC) not shown.

[0032] <Regarding the first and second positions of slide valve 17>

[0033] The slide valve 17 can be switched between a first position and a second position. For example, voltage is applied to the first pilot valve V1, and voltage application to the second pilot valve V2 is stopped. In this case, the first pilot valve V1 supplies compressed fluid from a fluid supply source (not shown) as pilot fluid to the first pilot pressure chamber 14c. On the other hand, the second pilot valve V2 discharges the pilot fluid in the second pilot pressure chamber 15c to the atmosphere. As a result, the slide valve 17 moves toward the second piston receiving recess 15b. Consequently, the slide valve 17 switches to the first position, connecting the supply port P1 with the first output port A1 and connecting the second output port A2 with the second discharge port R2. In addition, when the slide valve 17 is switched to the first position, the supply port P1 and the second output port A2 are blocked from each other, and the first output port A1 and the first discharge port R1 are blocked from each other. Figure 2 In the image, fluid flow is indicated by dotted lines.

[0034] Alternatively, for example, suppose that the voltage applied to the first pilot valve V1 is stopped, and the voltage is applied to the second pilot valve V2. In this case, the second pilot valve V2 supplies compressed fluid from the fluid supply source as pilot fluid to the second pilot pressure chamber 15c. On the other hand, the first pilot valve V1 discharges the pilot fluid in the first pilot pressure chamber 14c to the atmosphere. As a result, the slide valve 17 moves toward the first piston receiving recess 14b. As a result, the slide valve 17 switches to a second position that connects the supply port P1 with the second output port A2 and connects the first output port A1 with the first discharge port R1. In addition, when the slide valve 17 switches to the second position, the supply port P1 and the first output port A1 are blocked from each other, and the second output port A2 and the second discharge port R2 are blocked from each other.

[0035] Thus, by supplying and discharging pilot fluid to the first pilot pressure chamber 14c via the first pilot valve V1, and by supplying and discharging pilot fluid to the second pilot pressure chamber 15c via the second pilot valve V2, the slide valve 17 reciprocates between the first and second positions in the valve port 16. Switching the slide valve 17 to the first and second positions switches the connection state between the ports.

[0036] <Structure of Valve Assembly Base 20>

[0037] A supply flow path 21, a first output flow path 22, a second output flow path 23, a first discharge flow path 24, and a second discharge flow path 25 are formed on the valve assembly base 20. The first output flow path 22 and the second output flow path 23 are output flow paths formed on the valve assembly base 20. The first discharge flow path 24 and the second discharge flow path 25 are discharge flow paths formed on the valve assembly base 20. The supply flow path 21, the first output flow path 22, the second output flow path 23, the first discharge flow path 24, and the second discharge flow path 25 have a first end that opens into the mounting surface 20a.

[0038] The second end of the supply flow path 21 is connected, for example, via a piping to a fluid supply source (not shown). The second end of the first output flow path 22 is connected via a first piping T1 to an actuator X1, which is a fluid pressure device. The first piping T1 is connected to the valve assembly base 20 via a first connector T10. The second end of the second output flow path 23 is connected to the actuator X1 via a second piping T2. The second piping T2 is connected to the valve assembly base 20 via a second connector T20. The second ends of the first output flow path 22 and the second output flow path 23 open to one side 20b of the valve assembly base 20. The second ends of the first discharge flow path 24 and the second discharge flow path 25 are respectively connected to the atmosphere.

[0039] Actuator X1 includes cylinder X2. Piston X3 is reciprocally housed within cylinder X2. Piston rod X4 is connected to piston X3. Piston rod X4 can move in and out of cylinder X2. Cylinder X2 is divided into a first pressure chamber X5 and a second pressure chamber X6 by piston X3. First output flow path 22 is connected to first pressure chamber X5 via first piping T1. Second output flow path 23 is connected to second pressure chamber X6 via second piping T2.

[0040] <Structure of Pad 30>

[0041] like Figure 3 As shown, each gasket 30 has a gasket block 31. The gasket block 31 is rectangular. The gasket block 31 has a first opposing surface 31a opposite to the valve housing 12 and a second opposing surface 31b opposite to the valve assembly base 20. The length direction of the gasket block 31 is consistent with the length direction of the valve housing 12.

[0042] A circular shaft hole 37 is formed in the gasket block 31. The shaft hole 37 extends along the length direction of the gasket block 31. The first end of the shaft hole 37 opens into the first end face 31c, which is the end face of the gasket block 31 in the length direction. Therefore, the shaft hole 37 has an opening 37a that opens into the end face of the gasket block 31. The first end face 31c of the gasket block 31 is located on the side opposite to one side 20b of the valve assembly base 20.

[0043] The liner block 31 has a supply connection path 32, a first output connection path 33, a second output connection path 34, a first discharge connection path 35, and a second discharge connection path 36. The first output connection path 33 and the second output connection path 34 are output connection paths formed in the liner block 31. The first discharge connection path 35 and the second discharge connection path 36 are discharge connection paths formed in the liner block 31.

[0044] <Regarding Supply Connectivity Path 32>

[0045] The first end of the supply connection flow path 32 opens toward the first opposing surface 31a and communicates with the supply port P1. The second end of the supply connection flow path 32 opens toward the second opposing surface 31b and communicates with the supply flow path 21. Therefore, the supply connection flow path 32 connects the supply flow path 21 and the supply port P1. Thus, the supply flow path 21 and the supply port P1 are interconnected via the supply connection flow path 32. The supply connection flow path 32 extends between the first opposing surface 31a and the second opposing surface 31b in a manner that avoids the shaft hole 37.

[0046] <Regarding the first output connection path 33>

[0047] The first output connection flow path 33 includes a first flow path 33a and a second flow path 33b. The first end of the first flow path 33a opens toward the first opposing surface 31a and communicates with the first output port A1. The second end of the first flow path 33a communicates with the shaft hole 37. Thus, the first flow path 33a opens toward the inner circumferential surface of the shaft hole 37, making the first output port A1 communicate with the shaft hole 37.

[0048] The first end of the second flow path 33b opens toward the second opposing surface 31b and communicates with the first output flow path 22. The second end of the second flow path 33b communicates with the shaft hole 37. Thus, the second flow path 33b opens toward the inner circumferential surface of the shaft hole 37, allowing the first output flow path 22 to communicate with the shaft hole 37. Furthermore, the first output communication flow path 33 communicates with the shaft hole 37, allowing the first output flow path 22 to communicate with the first output port A1. Therefore, the first output flow path 22 and the first output port A1 are interconnected via the first output communication flow path 33.

[0049] <Regarding the second output connection path 34>

[0050] The second output connection flow path 34 includes a first flow path 34a and a second flow path 34b. The first end of the first flow path 34a opens toward the first opposing surface 31a and communicates with the second output port A2. The second end of the first flow path 34a communicates with the shaft hole 37. Thus, the first flow path 34a opens toward the inner circumferential surface of the shaft hole 37, allowing the second output port A2 to communicate with the shaft hole 37.

[0051] The first end of the second flow path 34b opens toward the second opposing surface 31b and communicates with the second output flow path 23. The second end of the second flow path 34b communicates with the shaft hole 37. Thus, the second flow path 34b opens toward the inner circumferential surface of the shaft hole 37, allowing the second output flow path 23 to communicate with the shaft hole 37. Furthermore, the second output communication flow path 34 communicates with the shaft hole 37, allowing the second output flow path 23 to communicate with the second output port A2. Therefore, the second output flow path 23 and the second output port A2 are interconnected via the second output communication flow path 34.

[0052] <Regarding the first discharge connecting flow path 35>

[0053] The first end of the first discharge connecting flow path 35 opens toward the first opposing surface 31a and communicates with the first discharge port R1. The second end of the first discharge connecting flow path 35 opens toward the second opposing surface 31b and communicates with the first discharge flow path 24. Therefore, the first discharge connecting flow path 35 connects the first discharge flow path 24 and the first discharge port R1. Thus, the first discharge flow path 24 and the first discharge port R1 are interconnected via the first discharge connecting flow path 35. The first discharge connecting flow path 35 extends between the first opposing surface 31a and the second opposing surface 31b in a manner that avoids the shaft hole 37.

[0054] <Regarding the second discharge connecting flow path 36>

[0055] The first end of the second discharge connecting flow path 36 opens toward the first opposing surface 31a and communicates with the second discharge port R2. The second end of the second discharge connecting flow path 36 opens toward the second opposing surface 31b and communicates with the second discharge flow path 25. Therefore, the second discharge connecting flow path 36 connects the second discharge flow path 25 and the second discharge port R2. Thus, the second discharge flow path 25 and the second discharge port R2 are interconnected via the second discharge connecting flow path 36.

[0056] <Structure of shaft hole 37>

[0057] The shaft hole 37 has a first shaft hole 38, a second shaft hole 39, a third shaft hole 40, a fourth shaft hole 41, and a fifth shaft hole 42. The first shaft hole 38, the second shaft hole 39, the third shaft hole 40, the fourth shaft hole 41, and the fifth shaft hole 42 are arranged in this order from the first end to the second end of the shaft hole 37. The first shaft hole 38 is continuous with the opening 37a of the shaft hole 37.

[0058] The second shaft hole 39 is continuous with the first shaft hole 38. A first flow path 33a, containing a first output connecting flow path 33, is opened in the second shaft hole 39. The first flow path 33a has an opening H1 that opens into the inner circumferential surface of the second shaft hole 39. The second shaft hole 39 is the first hole opening into the first flow path 33a. The inner diameter of the second shaft hole 39 is smaller than the inner diameter of the first shaft hole 38.

[0059] The third shaft hole 40 is continuous with the second shaft hole 39. The third shaft hole 40 is continuous with the opening H1 of the first flow path 33a. A second flow path 33b, which is an opening in the third shaft hole 40, is a first output connecting flow path 33. The second flow path 33b has an opening H2 that opens into the inner circumferential surface of the third shaft hole 40. The third shaft hole 40 is a second hole that is continuous with the opening H1 of the first flow path 33a and the second flow path 33b. The inner diameter of the third shaft hole 40 is smaller than the inner diameter of the second shaft hole 39. A valve seat is formed in the portion of the inner circumferential surface of the third shaft hole 40 between the opening H1 of the first flow path 33a and the opening H2 of the second flow path 33b, specifically forming a first valve seat 44.

[0060] The fourth shaft hole 41 is continuous with the third shaft hole 40. A first flow path 34a, containing a second output connecting flow path 34, is opened in the fourth shaft hole 41. The first flow path 34a has an opening H3 that opens into the inner circumferential surface of the fourth shaft hole 41. The fourth shaft hole 41 is the first hole opening into the first flow path 34a. The inner diameter of the fourth shaft hole 41 is smaller than the inner diameter of the third shaft hole 40.

[0061] The fifth shaft hole 42 is continuous with the fourth shaft hole 41. The fifth shaft hole 42 is continuous with the opening H3 of the first flow path 34a. A second flow path 34b, which is an opening in the fifth shaft hole 42, is a second output connecting flow path 34. The second flow path 34b has an opening H4 that opens into the inner circumferential surface of the fifth shaft hole 42. The fifth shaft hole 42 is a second hole that is continuous with the opening H3 of the first flow path 34a and the second flow path 34b. The inner diameter of the fifth shaft hole 42 is smaller than the inner diameter of the fourth shaft hole 41. A valve seat is formed in the portion of the inner circumferential surface of the fifth shaft hole 42 between the opening H3 of the first flow path 34a and the opening H4 of the second flow path 34b, specifically forming a second valve seat 46.

[0062] <Structure of Manual Shaft 50>

[0063] The gasket 30 has a manual shaft 50 movably housed in the shaft hole 37. The manual shaft 50 is cylindrical. The manual shaft 50 has a first valve portion 51, a second valve portion 52, a third valve portion 53, and a fourth valve portion 54 that are separated from each other in the axial direction of the manual shaft 50. The first valve portion 51, the second valve portion 52, the third valve portion 53, and the fourth valve portion 54 are arranged in this order from the first end to the second end of the manual shaft 50. The outer diameter of the first valve portion 51 is larger than the outer diameter of the second valve portion 52, the outer diameter of the second valve portion 52 is larger than the outer diameter of the third valve portion 53, and the outer diameter of the third valve portion 53 is larger than the outer diameter of the fourth valve portion 54.

[0064] A first annular sealing member 51a is installed on the outer peripheral surface of the first valve portion 51. The first sealing member 51a is made of rubber. Before elastic deformation, the outer diameter of the first sealing member 51a is smaller than the inner diameter of the first shaft hole 38 and larger than the inner diameter of the second shaft hole 39. When the first valve portion 51 is located inside the second shaft hole 39, the first sealing member 51a undergoes elastic deformation between the inner peripheral surfaces of the first valve portion 51 and the second shaft hole 39. Furthermore, the first sealing member 51a is in close contact with the inner peripheral surface of the second shaft hole 39. Thus, the inner peripheral surface of the second shaft hole 39 and the manual shaft 50 are sealed by the first sealing member 51a.

[0065] The second valve portion 52 can be seated on the first valve seat 44. Therefore, the second valve portion 52 is a valve portion that can be seated on the first valve seat 44, and the first valve seat 44 is a valve seat on which the second valve portion 52 can be seated. Specifically, an annular second sealing member 52a is installed on the outer peripheral surface of the second valve portion 52. The second sealing member 52a is made of rubber. Before elastic deformation, the outer diameter of the second sealing member 52a is smaller than the inner diameter of the second shaft hole 39 and larger than the inner diameter of the third shaft hole 40. When the second valve portion 52 is seated on the first valve seat 44, the second sealing member 52a undergoes elastic deformation between the second valve portion 52 and the first valve seat 44. Furthermore, the second sealing member 52a is in close contact with the first valve seat 44. Thus, the first valve seat 44 and the manual shaft 50 are sealed by the second sealing member 52a.

[0066] A circular third sealing member 53a is installed on the outer peripheral surface of the third valve portion 53. The third sealing member 53a is made of rubber. Before elastic deformation, the outer diameter of the third sealing member 53a is smaller than the inner diameter of the third shaft hole 40 and larger than the inner diameter of the fourth shaft hole 41. When the third valve portion 53 is located inside the fourth shaft hole 41, the third sealing member 53a undergoes elastic deformation between the inner peripheral surface of the third valve portion 53 and the fourth shaft hole 41. Furthermore, the third sealing member 53a is in close contact with the inner peripheral surface of the fourth shaft hole 41. Thus, the inner peripheral surface of the fourth shaft hole 41 and the manual shaft 50 are sealed by the third sealing member 53a.

[0067] The fourth valve portion 54 can be seated on the second valve seat 46. Therefore, the fourth valve portion 54 is a valve portion that can be seated on the second valve seat 46, and the second valve seat 46 is a valve seat on which the fourth valve portion 54 can be seated. Specifically, an annular fourth sealing member 54a is installed on the outer peripheral surface of the fourth valve portion 54. The fourth sealing member 54a is made of rubber. Before elastic deformation, the outer diameter of the fourth sealing member 54a is smaller than the inner diameter of the fourth shaft hole 41 and larger than the inner diameter of the fifth shaft hole 42. When the fourth valve portion 54 is seated on the second valve seat 46, the fourth sealing member 54a undergoes elastic deformation between the fourth valve portion 54 and the second valve seat 46. Furthermore, the fourth sealing member 54a is in close contact with the second valve seat 46. Thus, the second valve seat 46 and the manual shaft 50 are sealed by the fourth sealing member 54a.

[0068] <Regarding the first and second switch positions>

[0069] The manual shaft 50 is manually operated via the opening 37a. The manual shaft 50 can be manually switched to a first switching position and a second switching position. In the first switching position, the manual shaft 50 allows communication between the first output flow path 22 via the first output communication flow path 33 and the first output port A1, and between the second output flow path 23 via the second output communication flow path 34 and the second output port A2. Specifically, when the manual shaft 50 is in the first switching position, the second valve portion 52 is located inside the second shaft hole 39, thereby allowing communication between the first flow path 33a and the second flow path 33b via the shaft hole 37. Furthermore, when the manual shaft 50 is in the first switching position, the fourth valve portion 54 is located inside the fourth shaft hole 41, thereby allowing communication between the first flow path 34a and the second flow path 34b via the shaft hole 37.

[0070] like Figure 4 and Figure 5As shown, in the second switching position, the manual shaft 50 cuts off the connection between the first output flow path 22 via the first output connection flow path 33 and the first output port A1, and the connection between the second output flow path 23 via the second output connection flow path 34 and the second output port A2. Specifically, when the manual shaft 50 is in the second switching position, the second valve part 52 sits on the first valve seat 44, thereby cutting off the connection between the first flow path 33a and the second flow path 33b via the shaft hole 37. Furthermore, when the manual shaft 50 is in the second switching position, the fourth valve part 54 sits on the second valve seat 46, thereby cutting off the connection between the first flow path 34a and the second flow path 34b via the shaft hole 37.

[0071] <Structure of fixing pin 55 and spring 56>

[0072] like Figure 3 As shown, the gasket 30 has a retaining pin 55 as an insertion member and a spring 56 as a spring-loaded member. The retaining pin 55 is an elongated cylindrical shape. The retaining pin 55 protrudes into the inner side of the shaft hole 37.

[0073] The spring 56 is housed within the shaft hole 37. The spring 56 is positioned between the pad block 31 and the manual shaft 50. The first end of the spring 56 is supported by the pad block 31. The second end of the spring 56 is supported by the manual shaft 50. The spring 56 applies a spring force to the manual shaft 50, pushing it towards the first switching position.

[0074] <Structure of non-locking hole 57 and locking hole 58>

[0075] The manual shaft 50 has a non-locking hole 57 and a locking hole 58. The non-locking hole 57 opens to the outer peripheral surface of the manual shaft 50. The non-locking hole 57 extends in the axial direction of the manual shaft 50. The depth of the non-locking hole 57 is slightly larger than the outer diameter of the retaining pin 55. The depth of the non-locking hole 57 is the dimension of the non-locking hole 57 in the radial direction of the manual shaft 50.

[0076] The manual shaft 50 has an axis L1. With the retaining pin 55 inserted in the non-locking hole 57, the non-locking hole 57 allows the manual shaft 50 to move relative to the shaft hole 37 along the axis L1 and restricts the rotation of the manual shaft 50 about the axis L1 within the shaft hole 37.

[0077] The locking hole 58 opens to the outer peripheral surface of the manual shaft 50. The locking hole 58 extends circumferentially towards the manual shaft 50. The non-locking hole 57 has a first end near the first end of the manual shaft 50. The locking hole 58 continues from the first end of the non-locking hole 57. With the retaining pin 55 inserted in the non-locking hole 57, when the manual shaft 50 moves from the first switching position to the second switching position against the spring force of the spring 56, the locking hole 58 is positioned in the same direction as the retaining pin 55 along the axial direction of the manual shaft 50. In this state, the locking hole 58 and the retaining pin 55 cooperate to allow the manual shaft 50 to rotate about the axis L1. That is, the retaining pin 55 is inserted into the locking hole 58 in a manner that allows the manual shaft 50 to rotate about the axis L1 within the shaft hole 37. With the retaining pin 55 inserted in the locking hole 58, the movement of the manual shaft 50 to the first switching position is restricted by the spring force of the spring 56. In this embodiment, the circumferential length of the locking hole 58 is set such that the manual shaft 50 can rotate 90° around the axis L1.

[0078] <Regarding the first through hole 47 and the second through hole 48>

[0079] like Figure 6 As shown, the shim block 31 has a pair of first through holes 47 and a pair of second through holes 48. Therefore, the shim block 31 has two sets of pairs of through holes. The pair of first through holes 47 penetrate the shim block 31 in a manner communicating with the shaft hole 37. Figure 5 As shown, a pair of first through holes 47 are positioned near the opening 37a along the axial direction of the manual shaft 50, relative to the manual shaft 50 in the second switching position. The pair of first through holes 47 are located on opposite sides of the axis clamping the shaft hole 37. The axes of the pair of first through holes 47 are aligned. The axes of the pair of first through holes 47 are orthogonal to the axis of the shaft hole 37. The pair of first through holes 47 penetrate the shim block 31 in a direction orthogonal to the parallel arrangement direction Y1.

[0080] A pair of second through holes 48 penetrate the pad block 31 in a manner communicating with the shaft hole 37. The pair of second through holes 48 are positioned relative to the manual shaft 50 in the second switching position, near the opening 37a, along the axial direction of the manual shaft 50. The pair of second through holes 48 are located on opposite sides of the axis clamping the shaft hole 37. The axes of the pair of second through holes 48 are aligned. The axes of the pair of second through holes 48 are orthogonal to the axis of the shaft hole 37. The pair of second through holes 48 penetrate the pad block 31 in a parallel arrangement direction Y1. All the second through holes 48 of the pads 30 are arranged on a straight line extending in the parallel arrangement direction Y1. The axes of the pair of second through holes 48 are orthogonal to the axes of the pair of first through holes 47.

[0081] <Structure of slot 1, 59 and slot 2, 60>

[0082] like Figure 3 and Figure 6 As shown, two grooves, namely a first groove 59 and a second groove 60, are formed on the end face 50a of the first end of the manual shaft 50. The first groove 59 and the second groove 60 traverse the end face 50a of the manual shaft 50. The first groove 59 and the second groove 60 extend radially in the manual shaft 50. The first groove 59 and the second groove 60 are orthogonal to each other.

[0083] When the manual shaft 50 is in the first switching position, the first groove 59 extends along the axis of the second through hole 48. When the manual shaft 50 is in the second switching position and its movement to the first switching position is restricted by the retaining pin 55 engaging with the locking hole 58, the first groove 59 extends along the axis of the first through hole 47. Therefore, when the manual shaft 50 is in the second switching position and its movement to the first switching position is restricted, the first groove 59 extends the end face 50a of the manual shaft 50 in a direction orthogonal to the parallel setting direction Y1.

[0084] When the manual shaft 50 is in the first switching position, the second groove 60 extends along the axis of the first through hole 47. When the manual shaft 50 is in the second switching position and its movement towards the first switching position is restricted, the second groove 60 extends along the axis of the second through hole 48. Therefore, when the manual shaft 50 is in the second switching position and its movement towards the first switching position is restricted, the second groove 60 extends the end face 50a of the manual shaft 50 in the parallel orientation direction Y1.

[0085] <About Padlocks 61>

[0086] like Figure 4 and Figure 7 As shown, with the manual shaft 50 in the second switching position, a padlock 61, serving as a locking component, can be installed on the pad block 31. The padlock 61 has a main body 62 and an arm 63. The arm 63 is U-shaped. In this embodiment, the padlock 61 is fitted to the pad block 31 by inserting the arm 63 through a pair of first through holes 47. The padlock 61 is fitted to the portion of the pad block 31 opposite to the first connector T10 and the second connector T20. The padlock 61 is locked to prevent manual operation of the manual shaft 50. The arm 63 cuts across the opening 37a of the shaft hole 37. In other words, the arm 63 blocks a portion of the opening 37a of the shaft hole 37. Therefore, when the manual shaft 50 is in the second switching position, the arm 63 of the padlock 61 can be inserted through a pair of first through holes 47 while blocking a portion of the opening 37a. The arm 63 engages with the first groove 59. Therefore, the first groove 59 is the locked part that engages with the arm 63 of the closed opening 37a.

[0087] When the manual shaft 50 is in the second switching position and its movement to the first switching position is restricted, the arm 63 engages with the first groove 59, thereby restricting the rotation of the manual shaft 50. Thus, when the manual shaft 50 is in the second switching position and its movement to the first switching position is restricted, the first groove 59 is a groove extending along the axis of a pair of first through holes 47.

[0088] <Function>

[0089] Next, the function of this embodiment will be explained.

[0090] like Figure 2 As shown, for example, assuming a voltage is applied to the first pilot valve V1 and the voltage application to the second pilot valve V2 is stopped, the slide valve 17 is in the first position. At this time, for example, as... Figure 2 and Figure 3 As shown, when the manual shaft 50 is switched to the first switching position, fluid from the fluid supply source is supplied to the first pressure chamber X5 of the actuator X1 via piping, supply flow path 21, supply connecting flow path 32, supply port P1, first output port A1, first output connecting flow path 33, first output flow path 22, and first piping T1. When fluid is supplied to the first pressure chamber X5, piston X3 is pressed into the second pressure chamber X6, and piston rod X4 moves in the direction protruding from cylinder X2. Furthermore, fluid in the second pressure chamber X6 is discharged to the atmosphere via second piping T2, second output flow path 23, second output connecting flow path 34, second output port A2, second discharge port R2, second discharge connecting flow path 36, second discharge flow path 25, and piping. As described above, the actuator X1 connected to the first output connection flow path 33 and the second output connection flow path 34 is operated by the fluid flowing through the first output connection flow path 33 and the second output connection flow path 34.

[0091] During maintenance, it is necessary to stop the operation of actuator X1. To do this, the manual shaft 50 is manually switched from the first switching position to the second switching position. In the manual operation, firstly, until the manual shaft 50 has moved to the second switching position, the operator presses the manual shaft 50 into the opening 37a of the shaft hole 37. At this time, with the retaining pin 55 inserted into the non-locking hole 57, the manual shaft 50 is pressed in against the spring force of the spring compression spring 56. Then, after moving the manual shaft 50 from the first switching position to the second switching position, the manual shaft 50 is rotated 90° so that the retaining pin 55 is inserted into the locking hole 58. This restricts the movement of the manual shaft 50 to the first switching position based on the spring force of the spring compression spring 56. In other words, the manual shaft 50 is held in the second switching position by the locking hole 58 and the retaining pin 55 engaging with the locking hole 58.

[0092] like Figure 4 and Figure 5 As shown, in the second switching position, the connection between the first output path 22 via the first output connection path 33 and the first output port A1, and the connection between the second output path 23 via the second output connection path 34 and the second output port A2, are blocked. Therefore, the paths from the first output port A1 to the actuator X1 and from the second output port A2 to the actuator X1 are blocked.

[0093] Therefore, when the manual shaft 50 switches from the first switching position to the second switching position, the connection between the first output flow path 22 via the first output connection flow path 33 and the first output port A1 is cut off. Thus, when the manual shaft 50 is in the second switching position, even if, for example, the slide valve 17 of the solenoid valve 11 malfunctions, causing a change in the fluid pressure at the first output port A1, the fluid pressure between the first output flow path 22 and the actuator X1 will not change. Therefore, the fluid pressure between the first output flow path 22 and the actuator X1 is maintained. Therefore, the operation of the actuator X1 is reliably stopped. As a result, maintenance work can be performed safely.

[0094] <Effect>

[0095] The following effects can be obtained from the above implementation methods.

[0096] (1) The manual axis 50 can be switched to a first switching position and a second switching position. When the manual axis 50 is switched to the second switching position, the connection between the first output flow path 22 via the first output connection flow path 33 and the first output port A1 is cut off, as is the connection between the second output flow path 23 via the second output connection flow path 34 and the second output port A2. Therefore, the path from the first output port A1 to the actuator X1 and the path from the second output port A2 to the actuator X1 can be cut off. Thus, when the manual axis 50 is in the second switching position, even if, for example, the slide valve 17 of the solenoid valve 11 malfunctions, causing a change in the fluid pressure at the first output port A1 or the second output port A2, the fluid pressure between the first output flow path 22 and the actuator X1, and the fluid pressure between the second output flow path 23 and the actuator X1, will not change when the manual axis 50 is in the second switching position. As a result, the fluid pressure between the first output flow path 22 and the actuator X1, and the fluid pressure between the second output flow path 23 and the actuator X1 are maintained. Therefore, by switching the manual shaft 50 to the second switching position, the operation of the actuator X1 can be reliably stopped. Thus, reliability can be improved.

[0097] (2) The padlock 61 can be fitted onto the pad block 31 while the manual shaft 50 is in the second switching position. By fitting the padlock 61 onto the pad block 31, manual operation of the manual shaft 50 in the second switching position can be prevented. Therefore, it is possible to prevent the operator from unintentionally moving the manual shaft 50 from the second switching position to the first switching position. In addition, by locking the padlock 61 fitted onto the pad block 31, the operator can prevent a third party from manually operating the manual shaft 50 against the operator's will. Therefore, reliability can be further improved.

[0098] (3) When the manual shaft 50 is in the second switching position, the arm 63 of the padlock 61 is inserted into a pair of first through holes 47 with a portion of the opening 37a closed. When the padlock 61 is assembled to the pad block 31, the arm 63 of the padlock 61 is inserted into a pair of first through holes 47 respectively, thus stabilizing the assembly of the padlock 61 to the pad block 31. Furthermore, the padlock 61 is assembled to the pad block 31 with the arm 63 of the padlock 61 closing a portion of the opening 37a of the shaft hole 37. The arm 63 of the padlock 61 cuts across the opening 37a. Therefore, the padlock 61 prevents manual operation of the manual shaft 50 in the second switching position through the opening 37a of the shaft hole 37.

[0099] (4) With the retaining pin 55 inserted into the non-locking hole 57, after the manual shaft 50 moves from the first switching position to the second switching position against the spring force of the spring compression spring 56, the retaining pin 55 is inserted into the locking hole 58 to allow rotation of the manual shaft 50. By inserting the retaining pin 55 into the locking hole 58, the movement of the manual shaft 50 to the first switching position is restricted, and the manual shaft 50 is held in the second switching position. Furthermore, when the manual shaft 50 is in the second switching position, the arm 63 of the padlock 61 engages with the first groove 59 of the manual shaft 50. Thus, rotation of the manual shaft 50 at the second switching position is restricted. Therefore, it is possible to prevent the manual shaft 50 from rotating in the second switching position against the operator's intention. Thus, it is possible to prevent the manual shaft 50 from moving from the second switching position to the first switching position against the operator's intention by the spring force of the spring compression spring 56. As a result, it is possible to prevent the manual shaft 50 from arbitrarily switching to the first switching position. Therefore, reliability can be further improved.

[0100] (5) The axes of the pair of first through holes 47 are aligned. The first groove 59 extends along the axis of the first through hole 47 when the manual shaft 50 is in the second switching position. Therefore, the arm 63 of the padlock 61, which is inserted into the pair of first through holes 47 and cuts through the opening 37a of the shaft hole 37, can easily engage with the first groove 59.

[0101] (6) When the manual shaft 50 moves from the first switching position to the second switching position, the second valve section 52 can be seated in the first valve seat 44 without getting stuck in the opening H1 of the first flow path 33a. Therefore, the manual operation of the manual shaft 50 is improved because the movement of the manual shaft 50 is smooth. Furthermore, when the manual shaft 50 moves from the first switching position to the second switching position, the fourth valve section 54 can be seated in the second valve seat 46 without getting stuck in the opening H3 of the first flow path 34a. Therefore, the manual operation of the manual shaft 50 is improved because the movement of the manual shaft 50 is smooth.

[0102] (7) The manual shaft 50 has a first groove 59 and a second groove 60, and the pad 30 has a first through hole 47 and a second through hole 48. Thus, the operator can choose to insert the arm of the padlock into the first through hole 47 or into the second through hole 48.

[0103] (8) The padlock 61 is assembled in the portion of the pad block 31 opposite to the first connector T10 and the second connector T20. Therefore, when the arm 63 of the padlock 61 is inserted into a pair of first through holes 47 of the pad 30 and engaged in the first groove 59 of the manual shaft 50, the padlock 61 is less likely to interfere with the first connector T10, the second connector T20, the first pipe T1, and the second pipe T2. Thus, the ease of assembly of the padlock 61 with the pad block 31 is improved.

[0104] <Variation Example>

[0105] Furthermore, the above embodiments can be modified as described below. The above embodiments and the following variations can be combined to implement the embodiments to a degree that does not contradict each other technically.

[0106] ·like Figure 8 As shown, a common padlock 70 arm 71 can also be used for all pads 30. The arm 71 of the padlock 70 inserts into the second through hole 48 of all pads 30 and engages with the second slot 60 of all manual shafts 50. Therefore, for example, it is not necessary to operate multiple padlocks prepared for each pad 30. Thus, the operation process can be simplified.

[0107] • In an embodiment, the manual shaft 50 may also not have the second groove 60, and the liner 30 may also not have a pair of second through holes 48.

[0108] • In this embodiment, the pad 30 may also not have a spring 56. In this case, for example, it may be structured such that the manual shaft 50 is spring-pressed to the first switching position by fluid pressure, and the manual shaft 50 switches to the first switching position by fluid pressure.

[0109] • In one embodiment, the padlock 61 may not be inserted into the pair of first through holes 47 while the arm 63 is partially blocking the opening 37a. Alternatively, the padlock 61 may be fitted onto the pad block 31 such that manual operation of the manual shaft 50 is impossible when the manual shaft 50 is in the second switching position.

[0110] • In an embodiment, for example, the axes of the pair of first through holes 47 may not be aligned. Even in this case, it is acceptable as long as the arm 63 of the padlock 61 inserted into the first through hole 47 engages with a portion of the manual shaft 50.

[0111] • In some implementations, the padlock 61 may not be installed on the pad block 31.

[0112] In one embodiment, the solenoid valve 11 may be, for example, a four-port solenoid valve that omits the second discharge port R2. As long as the solenoid valve 11 has at least one discharge port, it is acceptable. Alternatively, the solenoid valve 11 may be a three-port solenoid valve having a supply port, an output port, and a discharge port.

Claims

1. A solenoid valve assembly, comprising: Solenoid valve; A valve assembly base, which mounts the solenoid valve, and has a supply flow path, an output flow path, and a discharge flow path; and A gasket, located between the valve assembly base and the solenoid valve, is provided. The solenoid valve has the following characteristics: Valve housing, which has a valve orifice; Valve body, which is movably housed in the valve orifice; and The valve includes a supply port, an output port, and a discharge port, which are formed in the valve housing and communicate with the valve orifice, respectively. The gasket has: A liner block having a shaft hole; and A manual shaft, which can be movably housed in the shaft hole, The gasket block has: A supply flow path is provided, which connects the supply flow path to the supply port; A discharge flow path is provided that connects the discharge flow path to the discharge port; and An output flow path is provided, which communicates with the shaft hole and connects the output flow path to the output port. The output flow path is configured such that the fluid flowing within the output flow path causes the fluid pressure device connected to the output flow path to operate. The manual axis is configured to be able to be manually switched to a first switching position and a second switching position. The first switching position is a position that allows the output path through the output connection path to connect with the output port, and the second switching position is a position that blocks the connection between the output path through the output connection path and the output port.

2. The solenoid valve assembly according to claim 1, wherein, The pad block is configured to mount the locking component on the pad block so that manual operation of the manual shaft in the second switching position is disabled.

3. The solenoid valve assembly according to claim 2, wherein, The shaft hole has an opening that opens to the end face of the liner block. The manual shaft is configured to be manually operated via the opening. The liner has a pair of through holes communicating with the shaft hole. The pair of through holes are located closer to the opening on the axial direction of the manual shaft than the manual shaft in the second switching position. The pair of through holes are located on both sides of the axis that sandwiches the shaft hole. The locking component is a padlock. The pair of through holes are configured such that when the manual shaft is in the second switching position, the arm of the padlock is inserted into the pair of through holes in a state that partially blocks the opening.

4. The solenoid valve assembly according to claim 3, wherein, The gasket has: An insertion component that protrudes into the inner side of the shaft hole; and A spring-loaded component, housed within the shaft hole, applies a spring force to the manual shaft, pressing it toward the first switching position. The manual shaft has a non-locking hole and a locking hole that allow insertion of the insertion component. The non-locking hole is configured such that, with the insertion member inserted into the non-locking hole, the manual shaft is allowed to move relative to the shaft hole in the axial direction while restricting the rotation of the manual shaft about the axis within the shaft hole. The locking hole is configured such that, when the manual shaft is in the second switching position and the insertion member is inserted into the locking hole, the manual shaft is allowed to rotate around the axis within the shaft hole and the movement of the manual shaft to the first switching position is restricted.

5. The solenoid valve assembly according to claim 4, wherein, The manual shaft has a locking portion, which is configured such that the arm portion, which blocks a portion of the opening, engages with the locking portion to restrict the rotation of the manual shaft. The manual shaft is configured such that when the manual shaft is in the second switching position and the movement of the manual shaft towards the first switching position is restricted by the locking hole, the arm engages with the locked portion.

6. The solenoid valve assembly according to claim 5, wherein, The axes of the pair of through holes are aligned with each other. The locking portion is a groove formed on the end face of the manual shaft. When the manual shaft is in the second switching position and the movement of the manual shaft to the first switching position is restricted by the locking hole, the groove extends along the axis of the pair of through holes.

7. The solenoid valve assembly according to any one of claims 1 to 6, wherein, The output connectivity path includes: A first flow path having a first opening that opens into the inner circumferential surface of the shaft hole and communicates with the output port of the shaft hole; and The second flow path has a second opening that opens into the inner circumferential surface of the shaft hole and communicates with the output flow path and the shaft hole. The shaft hole includes: The first hole of the first flow path opening; and The second opening of the second flow path has a second hole that is continuous with the first opening. The inner diameter of the second hole is smaller than the inner diameter of the first hole. The manual shaft has a valve section. The portion between the first opening and the second opening on the inner circumferential surface of the second hole forms a valve seat in which the valve part can sit. When the manual shaft is in the first switching position, the valve section is located inside the first hole to allow communication between the first flow path and the second flow path via the shaft hole. When the manual shaft is in the second switching position, the valve falls onto the valve seat to block the communication between the first flow path and the second flow path via the shaft hole.

8. The solenoid valve assembly according to claim 6, wherein, Multiple solenoid valves are arranged in parallel. Multiple gaskets are arranged side-by-side in the same direction as the solenoid valves, with each gasket positioned between the corresponding solenoid valve and the valve assembly base. The pair of through holes penetrate the pad block in a direction orthogonal to the parallel arrangement direction of the pad. When the manual shaft is in the second switching position, the groove extends in a direction orthogonal to the parallel arrangement direction of the gasket.

9. The solenoid valve assembly according to claim 6, wherein, Multiple solenoid valves are arranged in parallel. Multiple gaskets are arranged side-by-side in the same direction as the solenoid valves, with each gasket positioned between the corresponding solenoid valve and the valve assembly base. The pair of through holes penetrate the pad block in the parallel arrangement direction of the pad. The through holes of all the gaskets are arranged on a straight line extending in the parallel arrangement direction of the gaskets. When the manual shaft is in the second switching position, the groove extends in the parallel arrangement direction of the gasket.

10. The solenoid valve assembly according to claim 6 or 8, wherein, The pair of through holes are a pair of first through holes. The gasket block also includes a pair of second through holes having an axis orthogonal to the axis of the pair of first through holes. The slot is the first slot. The manual shaft also has a second groove formed on the end face of the manual shaft. When the manual shaft is in the second switching position and the movement of the manual shaft to the first switching position is restricted by the locking hole, the second groove extends along the axis of the pair of second through holes.

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