TW201732181A - Electromagnetic valve for allowing a manual shaft to be manually operated before the manual shaft reaches a predetermined amount of operation - Google Patents

Abstract

The technical issue to be resolved with the present invention is to suppress the amount of electricity supplied to a coil. In view of this, the present invention provides an electromagnetic valve (10), which comprises an elastic portion (41). During a manual operation of a manual shaft (42), even if a movable iron core (33) abuts against a fixed iron core (32), the elastic portion (41) allows the manual shaft (42) to be manually operated before the manual shaft (42) reaches a predetermined amount of operation. Thus, it is not necessary to increase a stroke of the movable iron core (33) in advance in order to prevent the movable iron core (33) from being in contact with the fixed iron core (32) during an operation in which an operator manually operates the manual shaft (42).

Description

The electromagnetic valve

The present invention relates to solenoid valves.

The solenoid valve generally includes a valve body that switches a flow path formed in the body, and an electromagnetic portion that moves the valve body. The electromagnetic unit includes: a fixed iron core; a movable iron core for adsorbing to the fixed iron core; and a spring push spring that pushes the movable iron core in a direction away from the fixed iron core. Further, when electric power is supplied to the coil of the electromagnetic portion, the movable iron core is attracted to the fixed iron core against the elastic thrust of the spring push spring. As the movable iron core is attracted to the fixed iron core, the spool moves to switch the flow path.

Such a solenoid valve, for example, as disclosed in Patent Document 1, has a state in which a manual shaft is provided (the manual shaft can be manually operated by an operator from a push operation or a rotary operation). Further, when the operator manually operates the manual shaft, the movable iron core acts on the movable iron core against the spring force of the spring push spring to urge the movable iron core against the fixed iron core, and the movable iron core moves toward the fixed iron core. Thereby, the spool is moved to switch the flow path. With this configuration, for example, the operation of the solenoid valve can be confirmed without supplying electric power to the coil. Further, in the manual shaft, there is a case in which the manual shaft holds (locks) by itself when the operator manually operates the operation amount such as the amount of pressing or the amount of rotation predetermined by the manual shaft from the initial state. Thereby, the state of switching the flow path can be maintained, and the operation of the solenoid valve can be easily confirmed. <Prior Art Document> <Patent Document> [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 1-168079.

<Technical problems to be solved by the invention>

However, when the movable core is in contact with the fixed iron core while the operator manually operates the manual shaft, the manual operation of the manual shaft from the initial state cannot be manually performed. As a result, the manual shaft cannot be held by itself and cannot maintain the state of the switching flow path. Therefore, in order to prevent the movable iron core from coming into contact with the fixed iron core while the operator manually operates the manual shaft, it is necessary to lengthen the stroke of the movable iron core in advance. However, the longer the stroke of the movable iron core is, the more the power supply to the coil required for the movable iron core to be adsorbed to the fixed iron core is increased.

The present invention has been made to solve the above problems, and an object of the invention is to provide an electromagnetic valve capable of suppressing the amount of electric power supplied to a coil.

<Technical solution to solve the problem>

A solenoid valve for solving the above problem includes a valve body for switching a flow path formed in the body, an electromagnetic portion for moving the valve body, a manual shaft capable of being manually operated, and the electromagnetic portion having: a coil a fixed iron core; the movable iron core is adsorbed to the fixed iron core by supplying electric power to the coil; and a spring push spring that pushes the movable iron core in a direction separating from the fixed iron core, by manually operating the manual shaft When the pressing force against the movable iron core against the fixed thrust core of the spring push spring acts on the movable iron core, the movable iron core moves toward the fixed iron core, and the valve core moves to switch the flow passage. The manual shaft is held by itself when the predetermined amount of operation of the manual shaft is manually operated from the initial state. The solenoid valve further includes an elastically deformable elastic portion, and the elastically deformable elastic portion can abut the fixed amount in the middle of manually operating the manual shaft, and the movable shaft can reach the operation amount Manual operation of the aforementioned manual shaft is permitted.

Preferably, the solenoid valve further includes: a plug column which is divided with the body to accommodate a valve chamber of the valve body and has a valve seat for the valve core to be seated; a cylindrical valve guide member is accommodated in the foregoing a valve chamber disposed around the spool and guiding the spool, and abutting the movable core in a moving direction of the spool; and an adapter disposed in a relative direction of movement of the spool The plug is movable on the opposite side of the movable core and can be moved in the moving direction of the valve body by the manual operation of the manual shaft; the adapter has a valve member capable of abutting against the valve guide. In the abutting portion, one of the manual shaft and the adapter has the elastic portion.

Preferably, the adapter has the elastic portion, and the elastic portion includes a transmitting surface and a flat surface, the transmitting surface is inclined with respect to a spring pushing direction of the spring, and is manually operated by the manual shaft. Transmitting the pressing force to the movable iron core; the flat surface continuing in the direction of the manual shaft from the initial state in the conveying surface, and orthogonal to the spring pushing direction of the spring spring, and manually from the initial state When the operation amount of the manual shaft is operated, the spring force of the spring is transmitted, and the manual shaft includes a pressing surface and a contact surface, and the pressing surface extends along the communication surface and slides on the communication surface toward the valve. The guide member pushes the adapter; the contact surface continues on the opposite side of the pressing surface from the initial state in which the manual shaft is operated, and extends along the flat surface to be manually operated from the initial state When the manual shaft has the aforementioned operation amount, the flat surface is brought into contact with the flat surface.

Preferably, the adapter has a plurality of the abutting portions, and at least two of the plurality of abutting portions are capable of abutting the valve guide in a moving direction with respect to the valve body. The two sides of the aforementioned valve core are sandwiched in the orthogonal direction.

Preferably, the solenoid valve further includes a manual spring that pushes the adapter toward a side opposite to the plug and the valve guide in a moving direction of the spool, and is in the manual shaft In the initial state, the adapter is pushed toward the opposite side of the plug and the valve guide by the spring force of the manual spring, and the abutting portion is separated from the valve guide.

Preferably, the solenoid valve further includes a housing that is mounted on the plug, and the housing holds the manual shaft to be movable back and forth in a direction orthogonal to a moving direction of the spool.

<Effects of invention>

According to the present invention, it is possible to suppress the amount of electric power supplied to the coil.

(First embodiment)

Hereinafter, a first embodiment of a specific electromagnetic valve will be described with reference to Figs. 1 to 6 .

As shown in FIG. 1, the solenoid valve 10 is provided with a body 11 made of a non-magnetic material (made of a synthetic resin material). Further, the solenoid valve 10 includes a valve body 20 that switches a flow path formed in the body 11 and an electromagnetic portion 30 that moves the valve body 20. A connection portion CN for supplying electric power to the electromagnetic portion 30 through an external control unit is attached to the main body 11.

On one of the side surfaces on the bottom side of the body 11, a supply port 11a, an output port 11b, and a discharge port 11c are formed. A plug 12 is attached to an end portion of one end of the main body 11 in the longitudinal direction via a sealing portion 12s composed of a gasket or an O-ring. The plug 12 and the body 11 together divide the valve chamber 13 that houses the spool 20.

In the body 11 and the plug 12, a supply passage 14a that communicates with the supply port 11a is formed. Further, an output passage 14b communicating with the output port 11b and a discharge passage 14c communicating with the discharge port 11c are formed in the body 11. The supply port 11a communicates with the valve chamber 13 through the supply passage 14a. The output port 11b communicates with the valve chamber 13 through the output passage 14b. The discharge port 11c communicates with the valve chamber 13 through the discharge passage 14c.

In the plug column 12, a valve seat 12e on the supply side where the valve body 20 is seated is formed around the opening of the valve passage 13 in the end surface of the supply passage 14a facing the valve chamber 13. Further, in the main body 11, a valve seat 11e on the discharge side where the valve body 20 is seated is formed around the opening of the valve chamber 13 in the end surface of the discharge passage 14c facing the valve chamber 13. The spool 20 is engageable and disengageable for the two valve seats 11e, 12e. In the valve chamber 13, a spool spring 15 is interposed between the spool 20 and the plug 12.

A valve guide 21 having a bottomed cylindrical shape is accommodated in the valve chamber 13, and the valve guide 21 is disposed around the spool 20 and guides the spool 20. The valve guide 21 has a cylindrical portion 21a and a bottom portion 21b disposed around the valve body 20; the bottom portion 21b continues on the valve seat 11e side in the cylindrical portion 21a and extends in a moving direction with respect to the spool 20 Orthogonal directions. In the bottom portion 21b, an avoidance hole 21h for avoiding contact with the valve seat 11e is formed. The spool 20 abuts against the periphery of the avoidance hole 21h in the bottom portion 21b.

On the bottom portion 21b of the valve guide 21, a guide portion 21f that is inserted through the guide groove 11h formed in the body 11 is protruded. The valve guide 21 is guided by the guide portion 21f in the guide groove 11h, and is movable integrally with the valve body 20 in a state where the restriction is restricted with respect to the moving direction of the valve body 20. The spool 20 is pushed by the spring force of the spool spring 15 together with the valve guide 21 in a direction separating from the valve seat 12e. Therefore, the spool 20 moves together with the valve guide 21 in a state where the inclination of the valve guide 21 is suppressed.

The core chamber 16 is recessed in an end surface on the opposite side of the plug column 12 in the longitudinal direction of the body 11. In the body 11, a cylindrical magnetic frame 17 is extended from the periphery of the core chamber 16 to a position beyond the end surface on the opposite side to the plug 12. Therefore, the magnetic frame 17 is embedded in the body 11 on the side of the plug 12, and protrudes from the end surface of the body 11 opposite to the plug 12 on the opposite side of the plug 12.

The electromagnetic unit 30 includes a coil 31 disposed inside the magnetic frame 17, a columnar fixed iron core 32 fixed to the inner side of the coil 31, and a movable iron core 33 housed in the core chamber 16 by the pair of coils 31. The electric power is supplied to the fixed iron core 32; the spring push spring 34 pushes the movable iron core 33 in a direction separating from the fixed iron core 32. The poppet spring 34 is interposed between the fixed core 32 and the movable core 33. The movable iron core 33 is pushed toward the valve chamber 13 by the spring force of the spring force spring 34. The coil 31 is wound around the fixed core 32 via a resin reel 31a.

As shown in FIG. 2, the movable iron core 33 includes a pair of valve pressing portions 33a that extend toward the valve guide 21. The valve guide 21 abuts against a pair of valve pressing portions 33a which are a part of the movable iron core 33 in the moving direction of the valve body 20. Further, in a state where the movable iron core 33 is pushed by the poppet spring 34 toward the valve chamber 13, the valve pressing portion 33a presses the valve guide 21 to press the valve body 20 to the valve seat 12e.

As shown in FIGS. 3 and 4, when electric power is supplied to the coil 31, the coil 31 is excited, and magnetic flux passing through the magnetic frame 17, the fixed core 32, and the movable core 33 is generated around the coil 31. Then, the fixed iron core 32 generates suction force by the exciting action of the coil 31, and the movable iron core 33 is attracted to the fixed iron core 32 against the elastic thrust of the spring push spring 34, and the valve core 20 is moved toward the valve seat by the spring force of the spool spring 15. The 12e moves in the direction of separation and is seated on the valve seat 11e. Thereby, the supply passage 14a is opened and the discharge passage 14c is closed, and the supply port 11a and the output port 11b communicate via the supply passage 14a, the valve chamber 13 and the output passage 14b, and block the output port 11b and the discharge port 11c via the output passage 14b, the valve The communication between the chamber 13 and the discharge passage 14c.

As shown in FIG. 1 and FIG. 2, when the supply of electric power to the coil 31 is stopped, the attraction force of the fixed iron core 32 due to the exciting action of the coil 31 is lost, and the movable iron core 33 is fixed by the elastic thrust of the spring push spring 34. The core 32 moves in the direction of separation. Then, the valve pressing portion 33a of the movable iron core 33 presses the valve guide 21 and the valve body 20 toward the valve seat 12e against the spring force of the valve core spring 15, so that the valve body 20 is seated on the valve seat 12e. Thereby, the supply passage 14a is closed and the discharge passage 14c is opened, and the output port 11b and the discharge port 11c communicate via the output passage 14b, the valve chamber 13 and the discharge passage 14c, and block the supply port 11a and the output port 11b via the supply passage 14a, the valve The communication between the chamber 13 and the output passage 14b.

A mounting recess 12a is formed in an end surface of the plug 12 opposite to the electromagnetic portion 30. On the bottom surface of the mounting recess 12a, a pair of insertion holes 12b extending in the moving direction of the spool 20 are formed. A pair of insertion holes 12b are opened in the valve chamber 13 and disposed around the valve seat 12e.

An adapter 40 is mounted in the mounting recess 12a. The adapter 40 is disposed on the opposite side of the spool 20 from the movable core 33 in the moving direction of the spool 20. The adapter 40 has a flat body portion 40a and a pair of abutting portions 40b housed in the mounting recess 12a; the pair of abutting portions 40b protrude from the body portion 40a and are respectively inserted into A pair of insertion holes 12b. As described above, the adapter 40 has a plurality of abutments 40b. Each of the abutting portions 40b is inserted into each of the insertion holes 12b and protrudes into the valve chamber 13.

Each of the abutting portions 40b of the adapter 40 is guided by each of the insertion holes 12b, and is movable in the moving direction of the spool 20. The front end portion of each abutting portion 40b is disposed to face the tubular portion 21a of the valve guide 21 in the moving direction of the valve body 20. The pair of abutting portions 40b may abut against both sides of the valve body 20 in a direction orthogonal to the moving direction of the spool 20 with respect to the valve guide 21. Between the bottom surface of the mounting recess 12a and the body portion 40a of the adapter 40, there is a manual spring 40c that urges the adapter 40 relative to the plug 12 and the valve guide in the moving direction of the spool 20. The opposite side of the 21 is pushed.

As shown enlarged in FIG. 1, the body portion 40a of the adapter 40 has an elastic portion 41. The elastic portion 41 is a plate shape formed by bending, and is made of an elastically deformable resin. The elastic portion 41 has a plate-shaped inclined portion 41a and a plate-shaped flat portion 41b which continues from the end surface of the main body portion 40a opposite to the abutting portion 40b and is opposed to the spring of the spring spring 34. The plate-like flat portion 41b continues in the inclined portion 41a and on the opposite side of the main body portion 40a and extends in a direction orthogonal to the spring pushing direction of the poppet spring 34. The inclined portion 41a linearly extends in such a manner as to gradually separate from the movable iron core 33 in the moving direction of the valve body 20 from the end edge of the main body portion 40a toward the central portion of the main body portion 40a; the flat portion 41b is in the moving direction of the spool 20 The upper portion is disposed opposite to the central portion of the main body portion 40a.

As shown in FIGS. 1 and 2, the solenoid valve 10 includes a manually operable manual shaft 42 and a housing 43 attached to the plug 12. The outer casing 43 is attached to one side surface on the bottom side of the body 11 on the end surface of the plug 12 opposite to the electromagnetic portion 30. The outer casing 43 has a facing wall 43a that is disposed opposite to the flat portion 41b of the elastic portion 41 in the moving direction of the valve body 20. An insertion portion 42e of the manual shaft 42 is inserted between the flat portion 41b and the opposing wall 43a. Further, the outer casing 43 holds the manual shaft 42 so as to be movable back and forth in a direction orthogonal to the moving direction of the spool 20. The manual shaft 42 is held by the outer casing 43 such that its insertion portion 42e can enter between the flat portion 41b and the opposite wall 43a.

The state in which the insertion portion 42e of the manual shaft 42 protrudes most between the flat portion 41b and the opposing wall 43a is an initial state before the operator manually operates the manual shaft 42. When the user manually operates the manual shaft 42 so as to be pressed toward the outer casing 43 in a direction orthogonal to the moving direction of the valve body 20, the insertion portion 42e of the manual shaft 42 is immersed in the flat portion 41b and the pair. Between the walls 43a. Therefore, the operation direction of the manual shaft 42 is directed toward the direction in which the outer casing 43 is pressed into the manual shaft 42 in a direction orthogonal to the moving direction of the valve body 20. The insertion portion 42e of the manual shaft 42 is most immersed in the state between the flat portion 41b and the opposing wall 43a, and is a state in which the operator manually operates the predetermined amount of operation (the amount of pressing) of the manual shaft 42 from the initial state.

As shown enlarged in Fig. 1, the insertion portion 42e of the manual shaft 42 has a pressing surface 42a which extends along the outer surface of the inclined portion 41a and is slidably attached to the outer surface of the inclined portion 41a to be an adapter. 40 is urged toward the valve guide 21. Further, the insertion portion 42e of the manual shaft 42 has a contact surface 42b which continues from the opposite side of the pressing surface 42a from the initial state in which the manual shaft 42 is operated, and extends along the outer surface of the flat portion 41b. When the manual shaft 42 is manually operated by a predetermined amount of operation, the outer surface of the flat portion 41b is lifted to come into contact with the outer surface of the flat portion 41b. Therefore, the adapter 40 can be moved in the moving direction of the spool 20 as the manual shaft 42 is manually pressed by the manual shaft 42.

As shown in FIGS. 2 and 4, when the manual shaft 42 is in the initial state, the adapter 40 is pushed by the spring force of the manual spring 40c toward the opposite side of the plug 12 from the valve guide 21, and a pair of The joint 40b is separated from the valve guide 21.

Next, the action of the first embodiment will be described.

As shown in FIGS. 5 and 6, when the manual shaft 42 is manually operated from the initial state, the pressing surface 42a is slidably contacted with the outer surface of the inclined portion 41a, and the adapter 40 is pressed toward the valve guide 21. As a result, the adapter 40 moves against the spring force of the manual spring 40c toward the valve guide 21, and the pair of abutting portions 40b abut against the valve guide 21 in the direction of movement with respect to the spool 20. The both sides of the direction sandwiching valve body 20 urge the valve guide 21 and the movable iron core 33 against the fixed iron core 32 against the elastic thrust of the spring push spring 34. At this time, since the pair of abutting portions 40b abut against both sides of the valve body 20 in a direction orthogonal to the moving direction of the valve body 20 with respect to the valve guide 21, the valve guide 21 and the movable iron core are opposed to each other. When the pressing is performed, the valve guide 21 and the movable iron core 33 are hardly inclined with respect to the moving direction of the valve body 20.

Therefore, by manually operating the manual shaft 42, the pressing force against the movable iron core 33 against the elastic thrust of the spring push spring 34 acts on the movable iron core 33. Further, as the valve guide 21 moves toward the fixed core 32, the spool 20 switches the flow path by the elastic thrust of the spool spring 15. Therefore, the outer surface of the inclined portion 41a serves as the conveying surface 41c which is inclined with respect to the spring pushing direction of the poppet spring 34, and the movable iron core 33 is urged toward the fixed iron core 32 by the manual operation of the manual shaft 42. The pressing force of the movable iron core 33.

Further, even when the manual shaft 42 is manually operated, the movable iron core 33 abuts against the fixed iron core 32, and the elastic portion 41 is elastically deformed to allow the manual operation of the manual shaft 42 when the manual shaft 42 reaches a predetermined operation amount. Further, when the operation amount of the manual shaft 42 is manually operated, the contact surface 42b is placed on the outer surface of the flat portion 41b to be in surface contact with the outer surface of the flat portion 41b. Thereby, the elastic force of the poppet spring 34 is transmitted to the outer surface of the flat portion 41b and is received by the contact surface 42b. Therefore, the outer surface of the flat portion 41b is a flat surface 41d for conveying the spring force of the poppet spring 34 when the operation amount predetermined by the manual shaft 42 is manually operated. At this time, since the spring force of the spring spring 34 does not act on the transmission surface 41c, the manual shaft 42 does not act on the direction in which the manual shaft 42 is operated in the opposite direction from the initial state by the spring force of the spring spring 34. Back to force. Therefore, when the operation amount predetermined by the manual shaft 42 is manually operated from the initial state, the manual shaft 42 holds (locks) by itself, maintaining the state of switching the flow path. In this way, the operation of the solenoid valve 10 can be confirmed without supplying electric power to the coil 31.

According to the first embodiment, the following effects can be obtained.

(1) The solenoid valve 10 is provided with an elastic portion 41 that abuts against the fixed core 32 even when the manual shaft 42 is manually operated, and allows the manual shaft before the manual shaft 42 reaches a predetermined operation amount. 42 manual operation. Therefore, in the middle of the manual operation of the manual shaft 42 by the operator, it is not necessary to prevent the movable iron core 33 from coming into contact with the fixed iron core 32, and the stroke of the movable iron core 33 is increased in advance. As a result, the amount of electric power supplied to the coil 31 required for sucking the movable core 33 toward the fixed core 32 can be suppressed.

(2) The solenoid valve 10 includes the plug 12, the valve guide 21, and the adapter 40, and the adapter 40 includes an abutting portion 40b that can abut against the valve guide 21. The adapter 40 has an elastic portion 41. Such a configuration is suitable as a configuration of the electromagnetic valve 10 that can check the operation of the electromagnetic valve 10 without supplying electric power to the coil 31.

(3) The elastic portion 41 has a transmitting surface 41c and a flat surface 41d. The manual shaft 42 has a pressing surface 42a and a contact surface 42b. When the adapter 40 is provided with the elastic portion 41, the manual movement of the manual shaft 42 causes the pressing surface 42a to push the transmission surface 41c, and the movable iron core 33 is urged toward the movable iron core 33 to push the movable iron core 33. The pressure causes the movable core 33 to move toward the fixed core 32, moving the spool 20 and switching the flow path. Further, when the operation amount of the manual shaft 42 is manually operated, the spring force of the spring force spring 34 is transmitted to the flat surface 41d and is received by the contact surface 42b. Thereby, the force which is pressed against the manual shaft 42 in the opposite direction to the direction in which the manual shaft 42 is operated from the initial state due to the spring force of the manual shaft 42 spring spring 34 is not acted upon, and the manual operation of the manual shaft 42 is determined in advance from the initial state. The manual shaft 42 maintains itself while maintaining the state of switching the flow path.

(4) The adapter 40 has a pair of abutting portions 40b, and the pair of abutting portions 40b can abut against the valve guide 21 in a direction orthogonal to the moving direction of the spool 20 On both sides. Thereby, compared with, for example, only one abutting portion 40b is provided on the adapter 40, and only one abutting portion 40b abuts against the valve guide 21, the valve guide 21 and the movable iron core can be provided. It is difficult to tilt with respect to the moving direction of the spool 20 by 33. Therefore, since it is not necessary to increase the stroke of the movable iron core 33 with respect to the portion where the valve guide 21 and the movable iron core 33 are inclined, the amount of electric power supplied to the coil 31 required for sucking the movable iron core 33 toward the fixed iron core 32 can be further suppressed.

(5) If the pair of abutting portions 40b abut against the valve guide 21 when the manual shaft 42 is in the initial state, the pair of abutting portions 40b block the movement of the valve guide 21 toward the valve seat 12e, so that the spool The 20 is not seated on the valve seat 12e, and there is a concern that the sealing is poor. Therefore, when the manual shaft 42 is in the initial state, the adapter 40 is pushed by the spring force of the manual spring 40c toward the opposite side of the plug 12 from the valve guide 21, and the pair of abutting portions 40b are from the valve guide. 21 separation. Since the pair of abutting portions 40b does not block the movement of the valve guide 21 toward the valve seat 12e, the valve body 20 can be surely seated on the valve seat 12e while maintaining good sealing.

(6) The outer casing 43 holds the manual shaft 42 so as to be movable back and forth in a direction orthogonal to the moving direction of the spool 20. Thereby, the manual shaft 42 can be prevented from being detached from the solenoid valve 10, and the manual shaft 42 and the solenoid valve 10 can be integrated.

(7) Since the elastic portion 41 is elastically deformed, the manual operation of the manual shaft 42 is allowed, and in the middle of manually operating the manual shaft 42, excess force does not act on the manual shaft 42, the adapter 40, the valve guide 21, and the like. Therefore, the durability of each component can be improved.

(8) In the present embodiment, when the manual shaft 42 is manually operated, since the valve guide 21 is less likely to be inclined with respect to the moving direction of the valve body 20, the valve body 20 can be surely seated on the valve seat 11e while maintaining good performance. Sealing.

(9) The operation direction of the manual shaft 42 is a direction orthogonal to the moving direction of the spool 20. Thereby, the configuration of the solenoid valve 10 along the moving direction of the spool 20 can be miniaturized as compared with, for example, the direction in which the operation direction of the manual shaft 42 is along the moving direction of the spool 20.

(Second embodiment)

Hereinafter, a second embodiment of the specific electromagnetic valve will be described with reference to FIGS. 7 and 8. In the embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. Further, the solenoid valve according to the second embodiment is different from the first embodiment in that the adapter does not have an elastic portion, but the manual shaft has an elastic portion. As described above, it is sufficient that one of the manual shaft and the adapter has an elastic portion.

As shown in FIG. 7 and FIG. 8, the end surface on the opposite side of the contact portion 40b of the main body portion 40a of the adapter 40 has a first surface 50a and a second surface 50b, and the first surface 50a is pushed relative to the spring. The spring direction of the spring 34 is inclined; the second surface 50b continues from the first surface 50a and extends in a direction orthogonal to the spring pushing direction of the spring spring 34.

The manual shaft 42 has an elastic portion 51. The elastic portion 51 is formed in a curved plate shape and is made of an elastically deformable resin. The elastic portion 51 has a pressing surface 51a that extends along the first surface 50a and is slidably contacted with the first surface 50a to press the adapter 40 against the valve guide 21. Further, the elastic portion 51 has a contact surface 51b which continues from the opposite side of the pressing surface 51a from the initial state in which the manual shaft 42 is operated, and extends along the second surface 50b and is manually operated on the manual shaft 42. When the predetermined amount of operation is performed, the second surface 50b is placed on the surface and is in surface contact with the second surface 50b. The elastic portion 51 is inserted between the adapter 40 and the opposing wall 43a.

Next, the action of the second embodiment will be described.

When the manual shaft 42 is manually operated from the initial state, the pressing surface 51a is pressed against the first surface 50a, and the adapter 40 is pressed toward the valve guide 21. As a result, the adapter 40 moves toward the valve guide 21 against the spring force of the manual spring 40c; the pair of abutting portions 40b abut against the valve guide 21 in a direction orthogonal to the moving direction of the spool 20. Both sides of the valve body 20 are sandwiched in the direction, and the valve guide 21 and the movable iron core 33 are pressed against the fixed iron core 32 against the elastic thrust of the spring push spring 34.

Therefore, by manually operating the manual shaft 42, the pressing force against the movable iron core 33 against the elastic force of the spring pushing spring 34 acts on the movable iron core 33. Further, as the valve guide 21 moves toward the fixed core 32, the spool 20 is switched by the elastic thrust of the spool spring 15 to switch the flow path. Therefore, the pressing surface 51a of the elastic portion 51 functions as a transmission surface which is inclined with respect to the spring pushing direction of the spring spring 34, and conveys toward the movable iron core 33 toward the fixed iron core 32 by manual operation of the manual shaft 42. The pressing force of the movable iron core 33 is pushed.

Further, even when the manual shaft 42 is manually operated, the movable iron core 33 abuts against the fixed iron core 32, and the elastic portion 51 is elastically deformed to allow the manual operation of the manual shaft 42 when the manual shaft 42 reaches a predetermined operation amount. Then, when the operation amount determined in advance by the manual shaft 42 is manually operated, the contact surface 51b is placed on the second surface 50b and is in surface contact with the second surface 50b. Thereby, the elastic force of the poppet spring 34 is transmitted to the second surface 50b and is received by the contact surface 51b. Therefore, the contact surface 51b of the elastic portion 51 becomes a flat surface that transmits the spring force of the spring force spring 34 when the operation amount of the manual shaft 42 is manually operated. At this time, since the spring force of the poppet spring 34 does not act on the pressing surface 51a, it does not act on the manual shaft 42 by the spring force of the spring spring 34 to be pressed back in the opposite direction to the direction of operation from the initial state. The force of the shaft 42. Therefore, when the operation amount predetermined by the manual shaft 42 is manually operated from the initial state, the manual shaft 42 holds (locks) by itself, and maintains the state of switching the flow path. According to the second embodiment, the same effects as those described in (1), (2), and (4) to (9) of the first embodiment can be obtained.

(Third embodiment)

Hereinafter, a third embodiment of the specific electromagnetic valve will be described with reference to Figs. 9 and 10 .

As shown in FIGS. 9 and 10, the solenoid valve 60 is provided with a body 61 made of a non-magnetic material (made of a synthetic resin material). The main body 61 has a first body 611 that forms a flow path and houses the valve body 70, a second body 612 that houses the electromagnetic portion 80, and an intermediate body 613 that is disposed between the first body 611 and the second body 612. The spool 70 switches the flow path. The electromagnetic portion 80 moves the spool 70.

The first body 611 is formed with an air supply port 61a and an output port 61b. Further, a valve chamber 62 that accommodates the valve body 70 is formed in the first body 611. The valve chamber 62 is in communication with the air supply port 61a and the output port 61b. In the first body 611, a valve seat 61e for seating the valve body 70 is formed around the opening of the valve chamber 62 in the end surface facing the valve chamber 62. The spool 70 can be detached from the valve seat 61e.

A magnetic frame 63 is embedded in the second body 612. The electromagnetic unit 80 includes a coil 81 disposed inside the magnetic frame 63, a columnar fixed iron core 82 fixed to the inner side of the coil 81, and a movable iron core 83 which is adsorbed and fixed by supplying electric power to the coil 81. The core 82; a spring pusher 84 that pushes the movable iron core 83 in a direction separating from the fixed iron core 82. The fixed core 82 is disposed closer to the first body 611 than the movable core 83 and protrudes from the inside of the second body 612 into the intermediate body 613. An end surface of the fixed core 82 on the side of the intermediate body 613 is fitted to an open end of the first body 611 on the side of the intermediate body 613. The valve chamber 62 is divided by the first body 611 and the fixed core 82.

The valve chamber 62 houses a bottomed cylindrical valve guide 71 disposed around the spool 70 and guiding the spool 70. The valve guide 71 has a columnar projecting portion 71a that penetrates the fixed iron core 82 and abuts against the movable iron core 83. A restriction ring 64 is attached to the inner surface of the valve chamber 62 formed in the first body 611. The poppet spring 84 is present between the restricting ring 64 and the valve guide 71, and pushes the movable iron core 83 in a direction separating from the fixed iron core 82 via the valve guide 71.

Between the valve guide 71 and the spool 70, there is a spool spring 65 that pushes the spool 70 toward the valve seat 61e. Further, the valve guide 71 has a restricting projection 71f that restricts the movement of the spool 70 to the valve seat 61e.

When electric power is supplied to the coil 81, the coil 81 is excited, and magnetic flux passing through the magnetic frame 63, the fixed core 82, and the movable core 83 is generated around the coil 81. Then, the iron core 82 is fixed by the excitation action of the coil 81, and the movable iron core 83 is attracted to the fixed iron core 82 against the spring force of the spring force spring 84, and the valve guide 71 is pushed by the movable iron core 83 to the fixed iron core 82. Move in the direction of separation. Further, the valve body 70 is moved to the valve seat 61e by the spring force of the spool spring 65, and is seated on the valve seat 61e. Thereby, the output port 61b is closed, and the communication of the air supply port 61a and the output port 61b via the valve chamber 62 is blocked.

When the power supply to the coil 81 is stopped, the attraction force of the fixed iron core 82 generated by the exciting action of the coil 81 is extinguished, and the movable iron core 83 is moved in the direction of being separated from the fixed iron core 82 by the spring force of the spring force spring 84. At this time, although the valve core spring 65 pushes the valve body 70 toward the valve seat 61e, the restriction projection 71f restricts the movement of the valve body 70 to the valve seat 61e, and maintains the valve body 70 in a state of being separated from the valve seat 61e. Thereby, the output port 61b is opened, and the air supply port 61a and the output port 61b are allowed to communicate via the valve chamber 62.

An attachment recess 61c is formed in an end surface of the second body 612 opposite to the first body 611. The adapter recessed portion 61c is mounted with an adapter 85. The adapter 85 abuts against the end surface of the movable core 83 opposite to the fixed core 82. The adapter 85 is movable in the moving direction of the spool 70 in the mounting recess 61c.

An end surface of the adapter 85 opposite to the movable iron core 83 has a first surface 85a that is inclined with respect to a spring pushing direction of the spring spring 84, and a second surface 85b that extends from the first surface 85a and extends to The direction orthogonal to the direction in which the poppet spring 84 is pushed.

The solenoid valve 60 includes a manually operable manual shaft 86 and a housing 87 attached to the second body 612. The outer casing 87 has a facing wall 87a that is disposed opposite the adapter 85 in the moving direction of the spool 20. Further, the manual shaft 86 has an elastic portion 91. The elastic portion 91 is formed in a curved plate shape and is made of an elastically deformable resin. The elastic portion 91 has a pressing surface 91a that extends along the first surface 85a and is slidably contacted with the first surface 85a to press the adapter 85 against the valve guide 71. Further, the elastic portion 91 has a contact surface 91b which continues in the pressing surface 91a on the side opposite to the direction in which the manual shaft 86 is operated from the initial state, and extends along the second surface 85b and manually operates the manual shaft 86. When the predetermined amount of operation is performed, the second surface 85b is placed on the surface and is in surface contact with the second surface 85b. The elastic portion 91 is inserted between the adapter 85 and the opposing wall 87a.

The outer casing 87 holds the manual shaft 86 so as to be movable back and forth in a direction orthogonal to the moving direction of the spool 70. The manual shaft 86 is held in the elastic portion 91 by the outer casing 87 to be able to enter and exit between the adapter 85 and the opposite wall 87a.

Next, the action of the third embodiment will be described.

When the manual shaft 86 is manually operated from the initial state, the pressing surface 91a is slidably attached to the first surface 85a while the adapter 85 is pressed against the valve guide 71. As a result, the adapter 85 and the movable iron core 83 move toward the fixed iron core 82 against the spring force of the spring force spring 84, and the valve guide 71 is pressed by the movable iron core 83 to move in a direction separating from the fixed iron core 82. Further, the valve body 70 is moved to the valve seat 61e by the spring force of the spool spring 65 to switch the flow path.

Therefore, by manually operating the manual shaft 86, the pressing force against the movable iron core 83 against the elastic thrust of the spring pusher 84 acts on the movable iron core 83. Therefore, the pressing surface 91a of the elastic portion 91 functions as a transmission surface that is inclined with respect to the spring pushing direction of the spring spring 84, and conveys the movable iron core 83 toward the fixed iron core 82 by manual operation of the manual shaft 86. The pressing force of the movable iron core 83 is pushed.

Further, even in the middle of manually operating the manual shaft 86, the movable iron core 83 abuts against the fixed iron core 82, and the elastic portion 91 is elastically deformed to allow the manual operation of the manual shaft 86 when the manual shaft 86 reaches a predetermined operation amount. When the operation amount of the manual shaft 86 is manually operated, the contact surface 91b is placed on the second surface 85b and is in surface contact with the second surface 85b. Thereby, the spring force of the spring spring 84 is transmitted to the second surface 85b and is received by the contact surface 91b. Thereby, the contact surface 91b of the elastic portion 91 becomes a flat surface that transmits the spring force of the spring force spring 84 when the operation amount of the manual shaft 86 is manually operated. At this time, since the spring force of the spring spring 84 does not act on the pressing surface 91a, it does not act on the manual shaft 86 by the spring force of the spring spring 84, and is pressed back in the opposite direction to the direction of operation from the initial state. The force of the manual shaft 86. Therefore, when the operation amount predetermined by the manual shaft 86 is manually operated from the initial state, the manual shaft 86 holds (locks) by itself, and maintains the state of switching the flow path. According to the third embodiment, the same effects as those described in (1) of the first embodiment can be obtained.

(Fourth embodiment)

A fourth embodiment of the specific electromagnetic valve will be described below with reference to Figs. 11 to 14 .

As shown in FIGS. 11 to 14, the manual shaft 95 extends in a direction orthogonal to the moving direction of the valve body 20 with the rotation axis, and is held by the outer casing 43 so that the rotation axis is rotated about the rotation center. Therefore, the operation direction of the manual shaft 95 is a rotation direction in which the rotation axis extending in a direction orthogonal to the moving direction of the spool 20 is the center of rotation. The manual shaft 95 has a cylindrical operation portion 96; and a facing portion 97 that continues from the operation portion 96 and is partially disposed opposite to the elastic portion 98. As shown in FIG. 11 and FIG. 13, the opposing portion 97 has a pressing surface 97a which is disposed to face the elastic portion 98 when the manual shaft 95 is in an initial state, and a contact surface 97b which is initially provided by the operator. In the state manual operation, the predetermined amount of operation (rotation amount) of the manual shaft 95 is applied to the elastic portion 98 to be in surface contact with the elastic portion 98. The pressing surface 97a and the contact surface 97b extend in mutually orthogonal directions.

As shown in FIGS. 12(a) and 14(a), the operation portion 96 is formed with a groove portion 96a into which the rotation restricting pin 99 is inserted. The rotation restricting pin 99 is fixed to the outer casing 43, for example. The groove portion 96a has a first rotation regulating surface 961a that faces the outer circumference of the rotation restricting pin 99 when the manual shaft 95 is in the initial state, and the second rotation regulating surface 962a that manually operates the manual shaft 95 from the initial state. The predetermined amount of operation is placed facing the outer circumference of the rotation restricting pin 99. The first rotation restricting surface 961a and the second rotation restricting surface 962a extend in mutually orthogonal directions.

Further, when the predetermined operation amount of the manual shaft 95 is manually operated as shown in FIG. 14(b) in the initial state of FIG. 12(b), the second rotation restricting surface 962a faces the outer circumference of the rotation restricting pin 99. To the configuration. Further, when the operator further manually operates the manual shaft 95, the second rotation restricting surface 962a comes into contact with the outer peripheral surface of the rotation restricting pin 99, restricts the manual operation of the manual shaft 95, and restricts the rotation of the manual shaft 95.

Further, when the manual shaft 95 is to be returned to the initial state in a state where the amount of operation determined in advance by the manual operation of the manual shaft 95 is to be performed, the manual shaft 95 must be manually operated from the initial state by the manual operation of the manual shaft 95. Manual operation in the opposite direction of the operating direction. In this way, the first rotation restricting surface 961a is placed on the outer peripheral surface of the rotation restricting pin 99. Further, when the operator further manually operates the manual shaft 95, the first rotation restricting surface 961a comes into contact with the outer peripheral surface of the rotation restricting pin 99, restricts the manual operation of the manual shaft 95, and restricts the rotation of the manual shaft 95. In this embodiment, the rotation of the manual shaft 95 is performed within a range in which the rotation axis is 90 degrees from the center of rotation.

When the manual shaft 95 is manually operated from the initial state, the pressing surface 97a pushes the elastic portion 98. As a result, the adapter 40 moves toward the valve guide 21 against the spring force of the manual spring 40c; the pair of abutting portions 40b abut against the moving direction of the spool 20 with respect to the valve guide 21. The both sides of the valve body 20 are sandwiched in the direction, and the valve guide 21 and the movable iron core 33 are pressed against the fixed iron core 32 against the spring force of the spring force spring 34. Further, as the valve guide 21 moves toward the fixed core 32, the spool 20 switches the flow path by the elastic thrust of the spool spring 15.

Even in the middle of manually operating the manual shaft 95, the movable iron core 33 abuts against the fixed iron core 32, and the elastic portion 98 is elastically deformed to allow the manual operation of the manual shaft 95 when the manual shaft 95 reaches a predetermined operation amount. Further, when the operation amount of the manual shaft 95 is manually operated, the contact surface 97b is placed on the elastic portion 98 to be in surface contact with the elastic portion 98. Thereby, the spring force of the spring force spring 34 is transmitted to the contact surface 97b and is received by the contact surface 97b, so that the force of the spring force of the spring force spring 34 being pressed back to the manual shaft 95 in the opposite direction from the initial state operation is difficult to act on Manual shaft 95. Therefore, when the operation amount predetermined by the manual shaft 95 is manually operated from the initial state, the manual shaft 95 holds (locks) by itself, and maintains the state of switching the flow path. According to the fourth embodiment, the same effects as those described in (1) of the first embodiment can be obtained.

Further, the above embodiments may be modified as described below.

In the first and second embodiments, the number of the contact portions 40b may be one or three or more. For example, when the contact portion 40b is three or more, at least two of the plurality of abutting portions 40b can abut against the valve guide 21 in a direction orthogonal to the moving direction of the valve body 20. Both sides of the valve body 20 can be sandwiched.

In the first and second embodiments, for example, when the manual shaft 42 is in the initial state, the pair of abutting portions 40b may abut against the valve guide 21.

In the above embodiments, the operation directions of the manual shafts 42 and 86 may be, for example, the rotation center in the direction of rotation along the movement direction of the valve body 20.

10, 60‧‧‧ solenoid valve
11, 61‧‧‧ ontology
12‧‧‧ 塞柱
12e‧‧‧ valve seat
13‧‧‧Valve room
20, 70‧‧ ‧ spool
21, 71‧‧‧ valve guides
30, 80‧‧ ‧Electromagnetic Department
31, 81‧‧‧ coil
32, 82‧‧‧ Fixed iron core
33, 83‧‧‧ movable iron core
34, 84‧‧‧ Bouncing spring
40, 85‧‧‧ Adapter
40b‧‧‧Apartment
40c‧‧‧Manual spring
41, 51, 91, 98‧‧‧ Elastic Department
41c‧‧‧Transfer face
41d‧‧‧flat surface
42, 86, 95‧‧‧ manual axes
42a‧‧‧ Pushing surface
42b‧‧‧Contact surface
43‧‧‧Shell
51a, 91a‧‧‧ as the driving surface for the function of the communication surface
51b, 91b‧‧‧ as the contact surface of the flat surface.

Fig. 1 is a cross-sectional view showing a solenoid valve in the first embodiment. Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1. Fig. 3 is a cross-sectional view showing a state in which electric power is supplied to a coil of an electromagnetic unit. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3. Fig. 5 is a cross-sectional view showing a state in which the manual shaft is manually operated at a predetermined operation amount. Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5. Fig. 7 is a cross-sectional view showing the electromagnetic valve in the second embodiment. Fig. 8 is a cross-sectional view showing a state in which the manual shaft is manually operated at a predetermined operation amount. Fig. 9 is a cross-sectional view showing a solenoid valve in a third embodiment. Fig. 10 is a cross-sectional view showing a state in which the manual shaft is manually operated at a predetermined operation amount. Fig. 11 is a cross-sectional view showing a solenoid valve in a fourth embodiment. Fig. 12 (a) is a cross-sectional view taken along line 12-12 of Fig. 11; and Fig. 12 (b) is a cross-sectional view of the periphery of the rotation restricting pin. Fig. 13 is a cross-sectional view showing a state in which the manual shaft is manually operated at a predetermined operation amount. Fig. 14 (a) is a cross-sectional view taken along line 14-14 of Fig. 13; and Fig. 14 (b) is a cross-sectional view of the periphery of the rotation restricting pin.

CN‧‧‧Connecting Department

10‧‧‧ solenoid valve

11‧‧‧Ontology

11a‧‧‧Supply port

11b‧‧‧Output port

11c‧‧‧Drain port

11e‧‧‧ valve seat

11h‧‧‧ guiding groove

12‧‧‧ 塞柱

12a‧‧‧Installation recess

12e‧‧‧ valve seat

12s‧‧‧Seal Department

13‧‧‧Valve room

14a‧‧‧Supply access

14b‧‧‧Output pathway

14c‧‧‧Drainage path

15‧‧‧Spool spring

16‧‧‧ iron core room

17‧‧‧ Magnetic frame

20‧‧‧Spool

21‧‧‧ valve guides

21a‧‧‧ Tube

21b‧‧‧ bottom

21h‧‧‧ avoidance hole

21f‧‧‧Director

30‧‧‧Electromagnetic Department

31‧‧‧ coil

31a‧‧‧Reel

32‧‧‧Fixed core

33‧‧‧ movable iron core

34‧‧‧Bouncing spring

40‧‧‧Adapter

40a‧‧‧ Body Department

40c‧‧‧Manual spring

41‧‧‧Flexible Department

41a‧‧‧ inclined section

41b‧‧‧flat

41c‧‧‧Transfer face

41d‧‧‧flat surface

42‧‧‧Manual axis

42a‧‧‧ Pushing surface

42b‧‧‧Contact surface

42e‧‧‧ Insertion Department

43‧‧‧Shell

43a‧‧‧ opposite wall

Claims (6)

A solenoid valve comprising: a valve core for switching a flow path formed in the body; an electromagnetic portion for moving the valve body; a manual shaft capable of being manually operated, the electromagnetic portion having: a coil; a fixed iron core; a core that is attracted to the fixed core by supplying electric power to the coil; and a spring push spring that pushes the movable iron core in a direction separating from the fixed iron core, and manually operates the manual shaft to resist the foregoing When the biasing force of the spring of the spring pushes against the fixed iron core and the pressing force of the movable iron core acts on the movable iron core, the movable iron core moves toward the fixed iron core, and the valve core moves to switch the flow path from the initial state. When the operation amount of the manual shaft is manually operated, the manual shaft is held by itself, and an elastically deformable elastic portion is provided. The elastically deformable elastic portion abuts on the middle of manually operating the manual shaft, and the movable iron core abuts In the fixed iron core, the manual shaft can be allowed until the manual shaft reaches the aforementioned operation amount. Manual operation. The solenoid valve according to claim 1, further comprising: a plug column which is divided into a valve chamber for accommodating the valve body together with the main body and has a valve seat for the valve body to be seated; a cylindrical valve guide a member that is housed in the valve chamber and disposed around the valve body and guides the valve body, and abuts the movable iron core in a moving direction of the valve body; and an adapter that is in the valve core The movement direction is disposed on the opposite side of the plunger from the movable iron core, and can be moved by the manual shaft by the manual operation of the manual shaft to move in the moving direction of the valve body; the adapter has abutment In the abutting portion of the valve guide, one of the manual shaft and the adapter has the elastic portion. The solenoid valve according to claim 2, wherein the adapter has the elastic portion, and the elastic portion includes a transmitting surface and a flat surface, and the transmitting surface is inclined with respect to a spring pushing direction of the spring push spring by The manual operation of the manual shaft transmits the pressing force to the movable iron core; the flat surface continues in a direction in which the manual shaft is operated from the initial state in the conveying surface, and is orthogonal to a spring pushing direction of the spring spring. The manual thrust of the spring spring is transmitted when the manual shaft operation amount is manually operated from the initial state, and the manual shaft includes a pressing surface and a contact surface that extends along the communication surface and is slidably coupled to the aforementioned Transmitting the surface to urge the adapter toward the valve guide; the contact surface continues on the opposite side of the pressing surface from the initial state in which the manual shaft is operated, and extends along the flat surface When the aforementioned operation amount of the manual shaft is manually operated from the initial state, the flat surface is brought into contact with the flat surface. The solenoid valve according to claim 2 or claim 3, wherein the adapter has a plurality of the abutting portions, and at least two of the plurality of abutting portions are capable of abutting the valve guide Both sides of the valve body are sandwiched in a direction orthogonal to the moving direction of the valve body. The solenoid valve according to claim 2 or claim 3, further comprising: a manual spring that urges the adapter to the plug and the valve guide in a moving direction of the spool The opposite side is pushed, and when the manual shaft is in an initial state, the adapter is pushed toward the opposite side of the plug and the valve guide by the spring force of the manual spring, and the abutting portion Separated from the aforementioned valve guide. The solenoid valve according to claim 2 or claim 3, further comprising: a casing mounted on the plug, and the casing holding the manual shaft to be movable in a direction relative to the spool Move back and forth in orthogonal directions.