JP5793520B2 - solenoid valve - Google Patents

Description

  The present invention relates to a solenoid valve.

  2. Description of the Related Art Conventionally, an electromagnetic valve that switches a fluid flow path by contacting or separating a valve body from a valve seat is widely known. Among such solenoid valves, there are those equipped with a manual operation device that allows the valve body to be opened from the valve seat by manual operation when the valve body closes the valve seat due to an accident such as a power failure (for example, Patent Document 1).

  That is, as shown in FIG. 5A, the valve block portion 101 constituting the valve housing in the electromagnetic valve 100 has a valve block portion 101 that is directed from the outer surface of the valve block portion 101 toward the inner back side of the valve block portion 101. An extending supply port 117, an output port 118, and a discharge port 119 are formed. Further, a through hole 122 facing the end of the movable core 120 opposite to the fixed core 121 is formed on the outer surface of the valve block 101, and a manual operation as an example of a manual operation device is formed in the through hole 122. A pin 123 is inserted. Furthermore, a tapered inclined surface 124 that is widened from the distal end side to the proximal end side of the manual operation pin 123 is formed at the distal end portion of the manual operation pin 123 that is inserted inside the through hole 122.

  As shown in FIG. 5B, when the manual operation pin 123 is inserted inside the through hole 122, the inclined surface 124 of the manual operation pin 123 is different from the fixed core 121 in the movable core 120. The movable core 120 is moved in a direction approaching the fixed core 121 by pressing the opposite end. As a result, the supply port 117 and the output port are opened by opening the valve body 111A in conjunction with the movable core 120 from the open end of the valve block 101 in the supply port 117 without energizing the exciting coil 154. 118 is in a communication state.

JP-A-11-125357

  In the electromagnetic valve 100 described above, when the manual operation pin 123 is inserted into the through hole 122, the inclined surface 124 of the manual operation pin 123 causes the movable core 120 to move with respect to the moving direction of the movable core 120. It is pressed in a direction perpendicular to the inclined surface 124 in a direction crossing obliquely. Therefore, the valve element 111 </ b> B is pressed against the opening end on the inner back side of the valve block portion 101 in the discharge port 119 in an inclined state in conjunction with the tilting of the movable core 120. As a result, the valve body 111B cannot sufficiently close the opening end of the discharge port 119, and a part of the fluid supplied from the supply port 117 to the output port 118 is a gap between the valve body 111B and the opening end. There was a risk of leakage through the discharge port 119.

  The present invention has been made in view of such circumstances, and its purpose is to allow fluid supplied from the supply port to the output port to leak through the discharge port when the supply port and the output port are communicated by manual operation. An object of the present invention is to provide an electromagnetic valve capable of suppressing the operation.

  A solenoid valve that solves the above problems is accommodated in a valve chamber, a supply port that communicates with the valve chamber, an output port that communicates with the valve chamber, and a discharge port that communicates with the valve chamber; And abutting against a supply valve seat formed at the fluid inlet from the supply port in the valve chamber and a discharge valve seat formed at the fluid outlet to the discharge port in the valve chamber Alternatively, the valve body that switches the communication state between the ports via the valve chamber by being separated from each other, the fixed iron core on which the excitation coil is disposed on the outer periphery, and the valve body are configured to be movable together, A movable iron core that moves the valve body away from the supply valve seat and contacts the discharge valve seat by moving in a direction approaching the fixed iron core with energization of the excitation coil, and the discharge port Through the valve A pressing member that can regulate the outflow of fluid from the valve, and that presses the movable iron core in a direction in which the movable iron core approaches the fixed iron core in a state where the outflow of fluid from the valve chamber is regulated by the regulating unit; It has.

  In the electromagnetic valve, an insertion portion into which the pressing member is inserted from a direction intersecting a moving direction of the movable iron core is further formed at a position on the extension line of the center line of the discharge port in the body, It is preferable that the restricting portion is disposed at a distal end portion of the pressing member in the insertion direction with respect to the inserted portion, and is capable of airtightly contacting the inner peripheral surface of the discharge port.

  In the above-described electromagnetic valve, the pressing member has an inclined surface that expands from the distal end side to the proximal end side in the insertion direction into the inserted portion, and the fluid from the valve chamber through the discharge port by the restricting portion. It is preferable that the inclined surface is slid in the insertion direction of the pressing member with respect to a portion of the movable core opposite to the fixed core in a state where the outflow of the pressing member is restricted.

  It is preferable that the electromagnetic valve further includes a lock member that locks the pressing member in a state where the outflow of fluid from the valve chamber through the discharge port is restricted by the restriction portion.

  ADVANTAGE OF THE INVENTION According to this invention, when connecting a supply port and an output port by manual operation, it can suppress that the fluid supplied to an output port from a supply port leaks through an exhaust port.

Sectional drawing of the solenoid valve of 1st Embodiment. Sectional drawing which is a solenoid valve of the embodiment, and shows the state which opened the valve body from the supply valve seat by manual operation. Sectional drawing of the solenoid valve of 2nd Embodiment. Sectional drawing which is a solenoid valve of the embodiment, and shows the state which opened the valve body from the supply valve seat by manual operation. It is drawing which shows the conventional solenoid valve, Comprising: (a) is sectional drawing which shows the state before releasing a valve body from a valve seat by manual operation, (b) is after opening a valve body from a valve seat by manual operation. Sectional drawing which shows the state.

(First embodiment)
Hereinafter, a first embodiment of a solenoid valve will be described with reference to the drawings.
As shown in FIG. 1, the electromagnetic valve 10 includes a valve portion 12 having a valve body 11 for switching a fluid flow path, and a solenoid portion 13 for driving the valve portion 12.

  The valve portion 12 has a body 14 made of a nonmagnetic material such as resin and having both ends opened. A circular first recess 15 is provided on one end side (right side in FIG. 1) of the body 14 in the axial direction, and a circular shape is formed on the other end side (left side in FIG. 1) of the body 14 in the axial direction. The second recess 16 is recessed coaxially with the first recess 15.

  The body 14 is formed with a supply port 17, an output port 18, and a discharge port 19 in this order from one end side in the axial direction toward the other end side. A supply source (not shown) of fluid (for example, compressed air) is connected to the supply port 17. A fluid compressor (not shown) such as an air cylinder is connected to the output port 18. An exhaust pipe (not shown) is connected to the discharge port 19.

  Each of the ports 17, 18, and 19 has a circular shape, and extends in a direction orthogonal to the axial direction of the body 14 from the outer surface 14 a (the lower surface in FIG. 1) toward the inner back side of the body 14. Yes. In addition, end portions on the inner back side of the body 14 in the supply port 17 and the output port 18 communicate with the first recess 15. On the other hand, the discharge port 19 is interposed between the first recess 15 and the second recess 16 in the axial direction of the body 14, and has a circular communication hole 20 formed on the bottom surface of the first recess 15 in the body 14. And communicated with the first recess 15. A cylindrical discharge valve seat 21 is formed around the communication hole 20 serving as a fluid outlet to the discharge port 19 on the bottom surface of the first recess 15.

  A through hole 22 as an example of an insertion portion connected to the discharge port 19 is formed on an extension of the center line of the discharge port 19 in the body 14. The inner diameter of the through-hole 22 is larger than the inner diameter of the discharge port 19, and the end of the through-hole 22 opposite to the end connected to the discharge port 19 is an outside where the ports 17, 18, 19 open in the body 14. It opens to the outer side surface 14b (upper surface in FIG. 1) opposite to the side surface 14a. Further, the portion of the through hole 22 on the discharge port 19 side passes through the bottom surface of the second recess 16, and the second recess 16 and the discharge port 19 communicate with each other through the through hole 22. In addition, a columnar protrusion 24 is vertically provided on a surface portion located at the center of the diameter of the bottom surface of the second recess 16.

  A plug 30 having a substantially cylindrical shape with a bottom is fitted into the first recess 15. A valve chamber 32 is defined between the recess 31 formed at the tip of the plug 30 and the first recess 15. The discharge port 19 communicates with the valve chamber 32 through the communication hole 20. Further, between the outer peripheral surface of the plug 30 and the side surface of the first recess 15, the space between the supply port 17 and the opening end of the first recess 15 and the space between the supply port 17 and the output port 18 are airtight. Sealing members 33 and 34 such as O-rings to be sealed are respectively disposed.

  A supply passage 35 that connects the supply port 17 and the valve chamber 32 is formed in the plug 30. The end of the supply passage 35 on the valve chamber 32 side opens to the bottom surface of the recess 31, and a cylindrical supply valve is provided around the supply passage 35 serving as a fluid inlet from the supply port 17 on the bottom surface of the recess 31. A seat 36 is formed. In the valve chamber 32, the supply valve seat 36 and the discharge valve seat 21 are arranged to face each other in the axial direction of the body 14. A gap S is interposed between the tip of the plug 30 and the bottom surface of the first recess 15, and the output port 18 and the valve chamber 32 communicate with each other through the gap S.

  In the valve chamber 32, a substantially cylindrical valve body 11 is accommodated so as to be able to contact and separate from the supply valve seat 36 and the discharge valve seat 21. Further, the valve chamber 32 accommodates a valve spring 38 that urges the valve body 11 in a direction away from the supply valve seat 36. The valve spring 38 is configured by, for example, a coil spring. Further, the valve chamber 32 accommodates a holding portion 40 of a valve guide 39 that holds the valve body 11. From the holding portion 40 of the valve guide 39, a plurality of (two in this embodiment, only one is shown in FIG. 1) foot portions 41 are formed in the second recess 16 through through holes (not shown) formed in the body 14. It is extended to the side. And the tip of each foot portion 41 protrudes from the bottom surface of the second recess 16 in the axial direction of the body 14.

  When the valve body 11 is in contact with the discharge valve seat 21, the valve body 11 is released from the supply valve seat 36, so that the supply port 17 and the output port 18 communicate with each other through the valve chamber 32. . On the other hand, when the valve body 11 is in contact with the supply valve seat 36, the valve body 11 is released from the discharge valve seat 21, so that the output port 18 and the discharge port 19 communicate with each other through the valve chamber 32. . That is, in the valve part 12, the flow path of the fluid is switched by switching the communication state between the ports 17, 18, and 19 via the valve chamber 32.

  The solenoid part 13 has a cylindrical magnetic cover 50 made of a magnetic material fixed to the side surface of the body 14 where the second recess 16 opens. Inside the magnetic cover 50, a substantially cylindrical fixed iron core 51 made of a magnetic material such as iron, and an exciting coil 54 wound around the outer periphery of the fixed iron core 51 via an insulating material 52 and an insulating tape 53. And are fixed. Moreover, the solenoid part 13 has the movable iron core 55 accommodated so that it can move in the axial direction of the body 14 so that it may approach or leave | separate with respect to the fixed iron core 51 in the 2nd recessed part 16 of the body 14. FIG. In this case, the discharge port 19 is disposed closer to the movable core 55 than the output port 18 in the moving direction of the movable core 55, and the output port 18 is closer to the movable core 55 than the supply port 17 in the same direction. Has been placed.

  The movable iron core 55 is made of a magnetic material such as iron, and has a concave portion 56 opened to the fixed iron core 51 side. A through-hole 57 that penetrates in the moving direction of the movable iron core 55 is formed on the bottom surface of the recess 56, and the projection 24 formed on the body 14 is slidable in the projecting direction of the projection 24. Is inserted. In addition, an iron core spring 58 that urges the movable iron core 55 in a direction away from the fixed iron core 51 is interposed between the bottom surface of the recess 56 and the fixed iron core 51. The urging force of the iron core spring 58 is set larger than the urging force of the valve spring 38. Therefore, the movable iron core 55 always presses the valve element 11 against the supply valve seat 36 via the valve guide 39 based on the urging force from the iron core spring 58 to be in contact therewith. In addition, a corner 55 </ b> A located at the end of the movable iron core 55 opposite to the fixed iron core 51 protrudes inside the through hole 22 formed in the body 14.

  On one surface side (upper side in FIG. 1) of the valve part 12 and the solenoid part 13, an electrical cover 60 having a box shape with one side (lower side in FIG. 1) opened is fixed. A cylindrical bearing cylinder 61 is formed on the extension line of the center line of the through hole 22 formed in the body 14 of the valve portion 12 in the electrical cover 60. A rod-like manual shaft 62 is inserted into and supported by the bearing tube 61 so as to be movable in the axial direction.

  The manual shaft 62 has a columnar base end portion 63 inserted into the bearing tube 61 and a columnar tip end portion 64 inserted into the discharge port 19 through the through hole 22. The distal end portion 64 of the manual shaft 62 is inserted into the discharge port 19 through the through hole 22 from the direction intersecting the moving direction of the movable core 55 relative to the fixed core 51. In this case, the insertion direction of the manual shaft 62 into the discharge port 19 through the through hole 22 is coincident with the axial direction of the manual shaft 62. Note that the distal end portion 64 has a smaller cross-sectional diameter perpendicular to the axial direction of the manual shaft 62 than the proximal end portion 63. Further, the connecting portion 65 that connects the base end portion 63 and the tip end portion 64 in the manual shaft 62 has a semi-conical truncated cone shape, and its outer surface extends from the tip end side in the axial direction of the manual shaft 62 to the base end side. An expanded inclined surface 66 is formed. The inclined surface 66 is inclined obliquely with respect to the axial direction of the manual shaft 62.

  The base end portion 63 of the manual shaft 62 has a diameter of a cross-sectional shape orthogonal to the axial direction of the manual shaft 62 set to be approximately the same as the inner diameter of the through hole 22 formed in the body 14. An annular concave groove 67 is formed on the outer peripheral surface of the base end portion 63 of the manual shaft 62, and a sealing member 68 such as an O-ring is fitted into the concave groove 67. Therefore, the seal member 68 is interposed between the outer peripheral surface of the base end portion 63 of the manual shaft 62 and the inner surface of the through hole 22 of the body 14, so that the seal member 68 in the axial direction of the manual shaft 62 in the through hole 22. The space between the two sides with a gap between them is hermetically sealed.

  The distal end portion 64 of the manual shaft 62 has a cross-sectional diameter perpendicular to the axial direction of the manual shaft 62 set to be approximately the same as the inner diameter of the discharge port 19 formed in the body 14. An annular groove 69 is formed on the outer peripheral surface of the distal end portion 64 of the manual shaft 62, and a seal member 70 such as an O-ring as an example of a restricting portion is fitted into the groove 69. . The seal member 70 is interposed between the outer peripheral surface of the distal end portion 64 of the manual shaft 62 and the inner surface of the discharge port 19, so that both sides of the discharge port 19 sandwiching the seal member 70 in the axial direction of the manual shaft 62. The space between them is hermetically sealed.

  In addition, an annular portion 71 having a diameter larger than that of other portions of the base end portion 63 of the manual shaft 62 is formed at an intermediate position in the axial direction of the base end portion 63 of the manual shaft 62. A manual shaft spring 72 for biasing the manual shaft 62 toward the bearing tube 61 is interposed between the annular portion 71 of the manual shaft 62 and the outer surface 14b of the body 14.

Next, the operation of the electromagnetic valve 10 configured as described above will be described.
When the valve body 11 is released from the supply valve seat 36 by manual operation, the base end portion 63 of the manual shaft 62 exposed from the electrical cover 60 via the bearing cylinder 61 is resisted against the urging force of the manual shaft spring 72. Then, the manual shaft 62 is pressed in the axial direction.

  Then, as shown in FIG. 2, the proximal end portion 63 and the connecting portion 65 of the manual shaft 62 increase the amount of entry into the through hole 22, and the distal end portion 64 of the manual shaft 62 passes through the through hole 22. Increases the amount of entry. The seal member 70 fitted to the distal end portion 64 of the manual shaft 62 is disposed on the opening end 19 </ b> A side on the outer surface 14 a of the body 14 in the discharge port 19 with respect to the communication hole 20. Therefore, the seal member 70 is interposed between the outer peripheral surface of the distal end portion 64 of the manual shaft 62 and the inner peripheral surface of the discharge port 19, so that the space between the communication hole 20 and the open end 19A in the discharge port 19 is airtight. Sealed.

  Thereafter, the inclined surface 66 formed on the connecting portion 65 of the manual shaft 62 slides in the axial direction of the manual shaft 62 with respect to the corner portion 55A of the movable iron core 55, and the corner portion 55A of the movable iron core 55 moves along the inclined surface 66. Get on. Then, a pressing force acts on the corner portion 55 </ b> A of the movable iron core 55 from the inclined surface 66 in a direction perpendicular to the inclined surface 66. Since the inclined surface 66 is inclined obliquely with respect to the axial direction of the manual shaft 62, the inclined surface 66 and the corner 55 </ b> A of the movable iron core 55 are obliquely intersected with the axial direction of the manual shaft 62. A pressing force acts.

  The movable iron core 55 moves in a direction approaching the fixed iron core 51 based on a component orthogonal to the axial direction of the manual shaft 62 in the pressing force. Then, on the basis of the urging force from the valve spring 38, the valve guide 39 is integrated with the movable core 55 in a state where the foot 41 is in contact with the end of the movable core 55 opposite to the fixed core 51. Move. Then, the valve body 11 held by the holding portion 40 of the valve guide 39 moves in a direction to be released from the supply valve seat 36 together with the movable iron core 55 and the valve guide 39. As a result, the supply port 17 and the output port 18 communicate with each other via the valve chamber 32. Further, the valve body 11 abuts against the discharge valve seat 21 disposed in the valve chamber 32 so as to face the supply valve seat 36.

  Here, based on the component along the axial direction of the manual shaft 62 in the pressing force, the movable iron core 55 is inclined obliquely. In this case, the valve guide 39 in a state where the foot 41 is in contact with the end of the movable iron core 55 opposite to the fixed iron core 51 is also tilted, and the valve body 11 held by the holding portion 40 of the valve guide 39 is also the valve. Tilt with the guide 39 in an oblique manner.

  In this respect, in the present embodiment, when the inclined surface 66 of the manual shaft 62 slides on the corner portion 55A of the movable iron core 55, the outer peripheral surface of the distal end portion 64 of the manual shaft 62 and the inner peripheral surface of the discharge port 19 are in contact. By interposing the seal member 70 therebetween, the space between the communication hole 20 and the opening end 19 </ b> A in the discharge port 19 is sealed in an airtight manner. Therefore, even if the valve body 11 is tilted, the fluid that flows into the discharge port 19 from the valve chamber 32 is restricted from flowing out of the electromagnetic valve 10 through the open end 19A of the discharge port 19.

  After that, as shown in FIG. 1, when the manual operation on the manual shaft 62 is canceled, the manual shaft 62 has an annular portion 71 at the inner end of the electrical cover 60 in the bearing tube 61 according to the urging force of the manual shaft spring 72. Locked. After the pressing force from the inclined surface 66 of the manual shaft 62 to the corner portion 55 </ b> A of the movable iron core 55 is released, the seal member 70 fitted to the distal end portion 64 of the manual shaft 62 is discharged from the communication hole 20. 19 is disposed on the end side that is continuous with the through hole 22. Therefore, the space between the communication hole 20 and the opening end 19 </ b> A in the discharge port 19 is not sealed airtight by the seal member 70. Therefore, the output port 18 and the discharge port 19 are in communication with each other via the valve chamber 32.

According to the first embodiment, the following effects can be obtained.
(1) In a direction in which the movable iron core 55 approaches the fixed iron core 51 in a state where the outflow of the fluid from the valve chamber 32 through the discharge port 19 is restricted by the seal member 70 fitted to the front end portion 64 of the manual shaft 62. Pressed. The valve body 11 that moves integrally with the movable iron core 55 is separated from the supply valve seat 36 and communicates between the supply port 17 and the output port 18 via the valve chamber 32. Therefore, when the supply port 17 and the output port 18 are communicated by manual operation, even if the valve body 11 is tilted in conjunction with the tilt of the movable core 55, the fluid supplied from the supply port 17 to the output port 18 is discharged from the discharge port. Leakage through 19 can be suppressed.

  (2) When the manual shaft 62 is inserted into the through hole 22 of the body 14 from the direction intersecting the moving direction of the movable iron core 55, the seal member 70 fitted to the distal end portion 64 of the manual shaft 62 is connected to the discharge port 19. Abuts against the inner peripheral surface in an airtight manner. Therefore, the supply port 17 and the output port 18 are manually operated while suppressing the fluid supplied from the supply port 17 to the output port 18 from leaking through the discharge port 19 by the insertion operation of the manual shaft 62 into the through hole 22. Can communicate.

  (3) When the manual shaft 62 is inserted into the through hole 22, the inclined surface 66 of the manual shaft 62 is moved into the movable iron core 55 in a state where the outflow of fluid from the valve chamber 32 through the discharge port 19 is restricted by the seal member 70. Is slid in the insertion direction of the manual shaft 62 with respect to the movable iron core 55 so as to ride up. For this reason, the manual operation of the supply port 17 and the output port 18 is suppressed while preventing the fluid supplied from the supply port 17 to the output port 18 from leaking through the discharge port 19 by the operation of inserting the manual shaft 62 into the through hole 22. Can communicate smoothly.

  (4) Even if the valve body 11 is tilted, the fluid supplied from the supply port 17 to the output port 18 is prevented from leaking through the discharge port 19. Therefore, it is not necessary to set a large amount of movement of the movable core 55 relative to the fixed core 51 so that the valve body 11 can be seated on the discharge valve seat 21 even when the valve body 11 is tilted. Therefore, it is possible to suppress an increase in the amount of power supplied to the exciting coil 54 in order to move the movable iron core 55.

(Second Embodiment)
Next, a second embodiment of the electromagnetic valve 10 will be described with reference to the drawings. The second embodiment is mainly different from the first embodiment in that the inclined surface 66 of the manual shaft 62 presses the movable iron core 55 via the adapter 80. Therefore, in the following description, a configuration that is different from the first embodiment will be mainly described, and a configuration that is the same as or equivalent to that of the first embodiment will be denoted by the same reference numeral, and redundant description will be omitted.

  As shown in FIG. 3, a through hole 81 communicating with the supply passage 35 is opened on the bottom surface 30 </ b> A (right surface in FIG. 3) of the plug 30, and the opening of the bottom surface 30 </ b> A of the plug 30 in the through hole 81 is formed. A flat lid member 82 is fixed so as to be closed. An annular groove 83 is provided in the bottom surface 30 </ b> A of the plug 30, and a seal member 84 such as an O-ring is fitted in the groove 83. Therefore, the seal member 84 is interposed between the bottom surface 30A of the plug 30 and the lid member 82, whereby the opening of the bottom surface 30A of the plug 30 in the through hole 81 is sealed in an airtight manner.

  A through hole 22 connected to the discharge port 19 is formed on an extension of the center line of the discharge port 19 in the body 14. The through hole 22 has a first hole portion 22A that is continuous with the discharge port 19 and a second hole portion 22B that is wider than the first hole portion 22A. The end of the through hole 22 opposite to the discharge port 19 in the second hole 22 </ b> B is open to the bottom surface of the recess 85 provided in the outer surface 14 b of the body 14.

  Further, an insertion hole 86 penetrating in the direction orthogonal to the center line of the through hole 22 is formed in the vicinity of the opening of the second hole 22 </ b> B of the through hole 22 in the body 14. The manual shaft 62 is locked in the axial direction of the manual shaft 62 by passing through a pin hole (not shown) formed in the manual shaft 62 in a direction orthogonal to the axial direction of the manual shaft 62. A lock pin 87 is detachably disposed.

  The inner diameter of the first hole portion 22A of the through hole 22 is equal to the inner diameter of the discharge port 19, and the inner surface of the first hole portion 22A of the through hole 22 and the inner surface of the discharge port 19 are continuous with each other. . The through hole 22 does not penetrate the bottom surface of the second recess 16, and the second recess 16 and the discharge port 19 communicate with each other via a communication hole 88 formed on the bottom surface of the second recess 16. Yes. An adapter 80 is movably inserted into and supported by the communication hole 88.

  An end portion of the adapter 80 on the through hole 22 side has a truncated cone shape, and an outer surface thereof is a tapered inclined surface 90 along the inclined surface 66 of the manual shaft 62. Further, the end of the adapter 80 on the second recess 16 side has a flat surface shape and can come into contact with the outer peripheral portion of the end of the movable iron core 55 that is located on the side opposite to the fixed iron core 51. .

  The movable iron core 55 has a bottomed cylindrical shape opened to the opposite side to the fixed iron core 51, and an outward flange portion 91 having an annular shape is formed at the end opposite to the fixed iron core 51. Yes. A cylindrical bobbin 92 around which an exciting coil 54 is wound is disposed inside the magnetic cover 50, and the fixed iron core 51 is accommodated inside the bobbin 92. The exciting coil 54 is disposed on the outer periphery of the fixed iron core 51. The bobbin 92 accommodates almost the entire area of the movable iron core 55 except for the end on the flange portion 91 side. An iron core spring 58 is provided between the bobbin 92 and the flange portion 91 of the movable iron core 55 to urge the movable iron core 55 in a direction away from the fixed iron core 51.

  The proximal end portion 63A farthest from the discharge port 19 in the proximal end portion 63 of the manual shaft 62 has a larger cross-sectional diameter perpendicular to the axial direction of the manual shaft 62 than other portions in the proximal end portion of the manual shaft 62. . The proximal end portion 63A of the manual shaft 62 can be locked by the bottom surface of the recess 85 in which the through hole 22 is opened.

  The distal end portion 64 of the manual shaft 62 has a first portion 64A that is continuous with the connecting portion 65, and a second portion 64B that is located on the distal end side (the discharge port 19 side) with respect to the first portion 64A. The second portion 64B has a larger cross-sectional diameter perpendicular to the axial direction of the manual shaft 62 than the first portion 64A. An annular groove 69 is formed on the outer peripheral surface of the second portion 64B, and a sealing member 70 such as an O-ring is fitted in the groove 69. Therefore, the seal member 70 is interposed between the outer peripheral surface of the second portion 64 </ b> B of the manual shaft 62 and the inner surface of the discharge port 19, thereby sandwiching the seal member 70 in the axial direction of the manual shaft 62 in the discharge port 19. The space between both sides is hermetically sealed.

  The manual shaft 62 is separated from the discharge port 19 between the step formed by the difference in inner diameter between the first hole portion 22A and the second hole portion 22B in the through hole 22 and the annular portion 71 of the manual shaft 62. A manual shaft spring 72 that biases in the direction is interposed.

  When the valve body 11 is released from the supply valve seat 36 by manual operation, the base end portion 63 of the manual shaft 62 exposed from the body 14 through the recess 85 is resisted against the urging force of the manual shaft spring 72. Press in the axial direction of the manual shaft 62.

  Then, as shown in FIG. 4, the inclined surface 66 formed on the connecting portion 65 of the manual shaft 62 slides in the axial direction of the manual shaft 62 with respect to the inclined surface 90 of the adapter 80, and the inclined surface 90 of the adapter 80. Rides on the inclined surface 66 of the manual shaft 62. Since a pressing force acts on the inclined surface 90 of the adapter 80 in a direction perpendicular to the inclined surface 66 from the inclined surface 66 of the manual shaft 62, the pressing force is based on a component orthogonal to the axial direction of the manual shaft 62. Thus, the adapter 80 moves in the communication hole 88 toward the second recess 16 side.

  Then, the end of the adapter 80 opposite to the manual shaft 62 presses the movable iron core 55. Then, the movable iron core 55 moves in a direction approaching the fixed iron core 51 based on the pressing force acting from the adapter 80. Then, on the basis of the urging force from the valve spring 38, the valve guide 39 is integrated with the movable core 55 in a state where the foot 41 is in contact with the end of the movable core 55 opposite to the fixed core 51. Move. Then, the valve body 11 held by the holding portion 40 of the valve guide 39 moves in a direction to be released from the supply valve seat 36 together with the movable iron core 55 and the valve guide 39. As a result, the supply port 17 and the output port 18 communicate with each other via the valve chamber 32. Further, the valve body 11 abuts against the discharge valve seat 21 disposed in the valve chamber 32 so as to face the supply valve seat 36.

  In this case, since the adapter 80 abuts on the outer peripheral portion where the flange portion 91 is formed in the movable core 55, the movable core 55 is inclined obliquely. Then, the valve guide 39 in a state where the foot 41 is in contact with the end of the movable iron core 55 opposite to the fixed iron core 51 is also tilted, and the valve body 11 held by the holding portion 40 of the valve guide 39 is also the valve guide. Tilt diagonally together with 39. A slight gap is formed between the valve body 11 and the discharge valve seat 21. Therefore, a part of the fluid flowing from the supply port 17 to the output port 18 through the valve chamber 32 can flow into the discharge port 19 side through the gap between the valve body 11 and the discharge valve seat 21.

  In this regard, in the present embodiment, when the inclined surface 66 of the manual shaft 62 slides on the adapter 80, the seal member 70 fitted to the distal end portion 64 of the manual shaft 62 is located in the discharge port 19 rather than the communication hole 20. It arrange | positions at the opening end 19A side. Therefore, the seal member 70 is interposed between the outer peripheral surface of the distal end portion 64 of the manual shaft 62 and the inner peripheral surface of the discharge port 19, so that the space between the communication hole 20 and the open end 19A in the discharge port 19 is airtight. Sealed. Therefore, the fluid that flows into the discharge port 19 from the valve chamber 32 through the gap between the valve body 11 and the discharge valve seat 21 is restricted from flowing out of the electromagnetic valve 10 through the opening end 19A of the discharge port 19.

  Further, when the lock pin 87 passes through the manual shaft 62 in a direction orthogonal to the axial direction of the manual shaft 62, the manual shaft 62 is locked in the axial direction of the manual shaft 62. Therefore, the state in which the seal member 70 fitted to the distal end portion 64 of the manual shaft 62 seals between the communication hole 20 and the opening end 19A in the discharge port 19 in an airtight manner is maintained with high reliability.

According to the second embodiment, in addition to the effects (1) to (4) of the first embodiment, the following effects can be obtained.
(5) The lock pin 87 locks the manual shaft 62 in the axial direction of the manual shaft 62. Therefore, it is possible to reliably maintain the state in which the supply port 17 and the output port 18 are communicated by manual operation while suppressing the fluid supplied from the supply port 17 to the output port 18 from leaking through the discharge port 19. it can.

  (6) The manual shaft 62 presses the movable iron core 55 via the adapter 80. Therefore, unlike the first embodiment, there is no need to dispose the inclined surface 66 of the manual shaft 62 and the movable iron core 55 so as to face each other in the axial direction of the manual shaft 62, and the movable surface is movable with the inclined surface 66 of the manual shaft 62. It is not necessary to arrange the iron core 55 so as to overlap in the axial direction of the movable iron core 55. As a result, the entire axial direction of the movable iron core 55 can be covered with the magnetic cover 50. Therefore, compared with the first embodiment, magnetism can be efficiently applied from the exciting coil 54 to the movable iron core 55.

In addition, you may change said each embodiment into another embodiment as follows.
In each of the above embodiments, the discharge port 19, the output port 18, and the supply port 17 may be sequentially formed from one end side in the axial direction of the body 14 toward the other end side. In this case, the discharge port 19 is arranged farther from the movable core 55 than the output port 18 in the moving direction of the movable core 55, and the output port 18 is farther from the movable core 55 than the supply port 17 in the same direction. Be placed.

  In the second embodiment, the manual shaft 62 may be locked by locking the lock pin 87 in the axial direction of the manual shaft 62 with respect to the base end surface of the manual shaft 62. Alternatively, the manual shaft 62 may be rotated about the center line of the manual shaft 62 to lock the proximal end surface of the manual shaft 62 with respect to a part of the body 14 in the axial direction of the manual shaft 62. .

In the second embodiment, the configuration may be such that the lock member that locks the manual shaft 62 is omitted.
-In the said 1st Embodiment, it is good also as a structure provided with the locking member which locks the manual axis | shaft 62. FIG.

  -In the said 1st Embodiment, it is good also as a structure which chamfered the corner | angular part 55A located in the edge part on the opposite side to the fixed iron core 51 in the movable iron core 55 in inclination. In this case, the manual shaft 62 does not have the inclined surface 66 that expands from the distal end side to the proximal end side in the axial direction, and the cross-sectional shape orthogonal to the axial direction is a constant shape over the entire axial direction. It is good.

In each of the above embodiments, the through hole 22 into which the manual shaft 62 is inserted may be formed so as to extend from the valve chamber 32 in a direction intersecting the center line of the discharge port 19.
In the above embodiments, the shape of the manual shaft 62 is not limited to a substantially cylindrical shape, and other shapes such as a substantially elliptical column shape and a substantially polygonal column shape may be employed.

  In each of the above embodiments, the number of ports 17, 18, and 19 formed in the body 14 is not limited to three, and may be an electromagnetic valve having two or four or more ports.

  DESCRIPTION OF SYMBOLS 10 ... Solenoid valve, 11 ... Valve body, 14 ... Body, 17 ... Supply port, 18 ... Output port, 19 ... Discharge port, 21 ... Discharge valve seat, 22 ... Through-hole as an example of insertion part, 32 ... Valve Chamber, 36 ... Supply valve seat, 51 ... Fixed iron core, 54 ... Excitation coil, 55 ... Movable iron core, 62 ... Manual shaft as an example of a pressing member, 66 ... Inclined surface, 70 ... Seal member as a regulating part, 87 ... A lock pin as an example of a lock member.

Claims (4)

A body formed with a valve chamber, a supply port communicating with the valve chamber, an output port communicating with the valve chamber, and a discharge port communicating with the valve chamber;
A supply valve seat that is housed in the valve chamber and formed at the fluid inlet from the supply port in the valve chamber, and a discharge valve seat formed at the fluid outlet to the discharge port in the valve chamber A valve body that switches the communication state between the ports via the valve chamber by abutting or separating from,
A fixed iron core with an excitation coil arranged on the outer periphery;
The valve body is configured to be movable integrally with the excitation coil, and moves in a direction approaching the fixed iron core with energization to the excitation coil, thereby separating the valve body from the supply valve seat. A movable iron core abutting on the discharge valve seat;
A restricting portion capable of restricting the outflow of fluid from the valve chamber through the discharge port, and the movable iron core approaches the fixed iron core in a state in which the outflow of fluid from the valve chamber is restricted by the restricting portion. An electromagnetic valve, comprising: a pressing member that presses in a direction to be pressed. In the body, at a position on the extension line of the center line of the discharge port, an insertion portion into which the pressing member is inserted from a direction intersecting the moving direction of the movable iron core is further formed,
2. The restricting portion is disposed at a distal end portion of the pressing member in an insertion direction into the insertion portion, and can be brought into airtight contact with an inner peripheral surface of the discharge port. The solenoid valve described in 1.   The pressing member has an inclined surface that widens from the distal end side to the proximal end side in the insertion direction to the insertion portion, and the regulating portion regulates the outflow of fluid from the valve chamber through the discharge port. 3. The solenoid valve according to claim 2, wherein the inclined surface is slid in an insertion direction of the pressing member with respect to a portion of the movable core opposite to the fixed core in the state.   The lock member that locks the pressing member in a state in which the outflow of fluid from the valve chamber through the discharge port is regulated by the regulating portion is further provided. The solenoid valve according to one item.