TWI668388B - The electromagnetic valve - Google Patents

Abstract

The technical problem to be solved by the present invention is to suppress the power supply to the coil. In view of this, the present invention provides a solenoid valve (10) including an elastic portion (41). Even when the manual portion (42) is manually operated, the movable core (33) abuts against the fixed core ( 32) The manual operation of the manual shaft (42) is allowed until the manual shaft (42) reaches a predetermined operation amount. Therefore, it is not necessary to lengthen the stroke of the movable iron core (33) in advance in order to avoid the movable iron core (33) from abutting against the fixed iron core (32) during the manual operation of the manual shaft (42) by the operator.

Description

The electromagnetic valve

The present invention relates to a solenoid valve.

The solenoid valve generally includes a valve element that switches a flow path formed in the body, and an electromagnetic portion that moves the valve element. The electromagnetic part includes: a fixed iron core; a movable iron core for attracting the fixed iron core; and a spring for pushing the movable iron core in a direction away from the fixed iron core. In addition, when electric power is supplied to the coil of the electromagnetic portion, the movable iron core is attracted toward the fixed iron core against the elastic pushing force of the elastic spring. As the movable iron core is attracted to the fixed iron core, the valve core moves to switch the flow path.

Such a solenoid valve is, for example, disclosed in Patent Document 1, and has a configuration including a manual shaft (the manual shaft can be manually operated by an operator such as a pushing operation or a rotating operation from the outside). In addition, when the operator manually operates the manual shaft, a force acting on the movable core from the manual shaft against the elastic pushing force of the elastic spring to push the movable core toward the fixed core causes the movable core to move toward the fixed 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 power to the coil. In addition, the manual shaft includes a state in which the manual shaft is held (locked) by the operator when the operator manually operates an operation amount such as a pressing amount or a rotation amount determined in advance by the manual shaft from an initial state. Thereby, the state of the switching 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 Unexamined Patent Publication No. 1-168079.

<Technical problems to be solved by the invention>

However, if the movable iron core comes into contact with the fixed iron core during the manual operation of the manual shaft by the operator, the predetermined operation amount cannot be manually operated on the manual shaft from the initial state. In this way, the manual shaft cannot maintain itself and cannot maintain the state of switching the flow channel. Therefore, in order to avoid the abutment of the movable core and the fixed core during the manual operation of the manual shaft by the operator, it is necessary to lengthen the stroke of the movable core in advance. However, as the stroke of the movable iron core becomes longer, the power supply to the coil required for the movable iron core to adsorb to the fixed iron core increases accordingly.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide a solenoid valve capable of suppressing the power supply to a coil.

<Technical solution to solve the problem>

A solenoid valve for solving the above problems includes a valve element for switching a flow path formed in the body, an electromagnetic part for moving the valve element, and a manual shaft for manual operation. The electromagnetic part includes: a coil A fixed iron core; a movable iron core that is attracted to the fixed iron core by supplying power to the coil; and a spring that pushes the movable iron core in a direction separated from the fixed iron core and manually operates the manual shaft When the pushing force of the movable iron core against the elastic pushing force of the elastic spring toward the fixed iron core is applied to the movable iron core, the movable iron core moves toward the fixed iron core, so that the valve core moves to switch the flow path. , And the manual axis is held by itself when the manual operation amount of the manual axis is manually operated from the initial state. The solenoid valve is further provided with an elastically deformable elastic portion. Even if the elastically deformable elastic portion is in the middle of manually operating the manual shaft, the movable iron core can be in contact with the fixed iron core until the manual shaft reaches the operation amount. Allows manual operation of the aforementioned manual axis.

Preferably, the solenoid valve further includes: a plunger which, together with the body, divides a valve chamber accommodating the valve element and has a valve seat on which the valve element is seated; and a cylindrical valve guide which is accommodated in the valve element. A valve chamber, which is arranged around the valve element and guides the valve element, and abuts the movable iron core in a moving direction of the valve element; and an adapter, which is disposed opposite to the moving direction of the valve element The plunger is on the side opposite to the movable iron core and can be moved in the moving direction of the valve core by the manual shaft in accordance with the manual operation of the manual shaft; the adapter has a mechanism capable of abutting the valve guide. One of the contact portion, the manual shaft, and the adapter has the elastic portion.

In the solenoid valve, it is preferable that 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 an elastic pushing direction of the elastic spring, and is manually operated by the manual shaft. Transmitting the pushing force to the movable iron core; the flat surface continues the direction of operating the manual shaft from the initial state in the transmitting surface, and is orthogonal to the pushing direction of the pushing spring and is manually operated from the initial state When the manual shaft is operated, the elastic force of the elastic spring is transmitted. The manual shaft includes a pressing surface and a contact surface. The pressing surface extends along the transmission surface and slides on the transmission surface to face the valve. The guide pushes the adapter; the contact surface continues from the opposite side to the direction in which the manual shaft is operated from the initial state, and extends along the flat surface to be manually operated from the initial state When the manual operation amount of the manual shaft reaches the flat surface, the flat surface comes into contact with the flat surface.

In the solenoid valve, preferably, the adapter has a plurality of the abutting portions, and at least two of the plurality of abutting portions can abut the valve guide in a moving direction with respect to the valve element. Both sides of the valve core are sandwiched in an orthogonal direction.

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

Preferably, the solenoid valve further includes a housing mounted on the plug post, and the housing holds the manual shaft so as to be able to move back and forth in a direction orthogonal to a moving direction of the valve body.

<Effects of Invention>

According to the present invention, the amount of power supplied to the coil can be suppressed.

(First Embodiment)

Hereinafter, a first embodiment of a concrete solenoid valve will be described with reference to FIGS. 1 to 6.

As shown in FIG. 1, the solenoid valve 10 includes a main body 11 made of a non-magnetic material (made of a synthetic resin material). In addition, 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. The main body 11 is provided with a connection portion CN for supplying power to the electromagnetic portion 30 through an external control unit.

On one surface of 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 in the longitudinal direction in the body 11 with a sealing portion 12s made of a gasket or an O-ring interposed therebetween. The plunger 12 and the body 11 together define a valve chamber 13 accommodating the spool 20.

A supply passage 14a is formed in the body 11 and the plug 12 so as to communicate with the supply port 11a. Further, the main body 11 is formed with an output passage 14b communicating with the output port 11b and a discharge passage 14c communicating with the discharge port 11c. The supply port 11a communicates with the valve chamber 13 through a supply passage 14a. The output port 11b communicates with the valve chamber 13 through an output passage 14b. The discharge port 11c communicates with the valve chamber 13 through a discharge passage 14c.

In the plug 12, a valve seat 12 e on the supply side where the valve body 20 is seated is formed around the opening of the supply passage 14 a to the valve chamber 13 in the end face facing the valve chamber 13. Further, in the body 11, a valve seat 11 e on the discharge side where the valve body 20 is seated is formed around the opening of the discharge passage 14 c to the valve chamber 13 in an end surface facing the inside of the valve chamber 13. The valve body 20 can be engaged and disengaged with respect to the two valve seats 11e, 12e. In the valve chamber 13, a valve core spring 15 is interposed between the valve core 20 and the plug 12.

A valve guide 21 having a bottomed cylindrical shape is housed in the valve chamber 13, and the valve guide 21 is arranged around the valve body 20 and guides the valve body 20. The valve guide 21 has a cylinder portion 21 a and a bottom portion 21 b. The cylinder portion 21 a is arranged around the valve element 20. The bottom portion 21 b extends from the valve seat 11 e side of the cylinder portion 21 a and extends in the direction of movement relative to the valve element 20. Orthogonal direction. An escape hole 21h is formed in the bottom portion 21b to avoid contact with the valve seat 11e. The valve body 20 abuts around the avoidance hole 21h in the bottom portion 21b.

On the bottom portion 21 b of the valve guide 21, a guide portion 21 f protruding through a guide groove 11 h formed in the body 11 is protruded. The valve guide 21 is guided in the guide groove 11h by the guide portion 21f, and can move integrally with the valve body 20 in a state in which the valve guide 21 is restricted from being inclined with respect to the moving direction of the valve body 20. The valve body 20 is urged in a direction separated from the valve seat 12 e by the spring force of the valve body spring 15 together with the valve guide 21. Therefore, the valve body 20 moves with the valve guide 21 in a state where the valve guide 21 is prevented from tilting.

In the longitudinal direction of the main body 11, an iron core chamber 16 is recessed on an end surface opposite to the plug 12. In the main body 11, a cylindrical magnetic frame 17 extends from the periphery of the core chamber 16 to a position over an end surface on the side opposite to the plug 12. Therefore, the magnetic frame 17 is embedded in the body 11 on the side of the plug 12; on the opposite side of the plug 12, it protrudes from the end surface of the body 11 on the side opposite to the plug 12.

The electromagnetic section 30 includes a coil 31 disposed inside the magnetic frame 17, a columnar fixed core 32 fixedly disposed inside the coil 31, and a movable core 33 accommodated in the core chamber 16 and opposed to the coil 31. Power is supplied to the fixed iron core 32, and the spring 34 is elastically urged to move the movable iron core 33 in a direction separated from the fixed iron core 32. The spring spring 34 is interposed between the fixed iron core 32 and the movable iron core 33. The movable iron core 33 is urged toward the valve chamber 13 by the urging force of the urging spring 34. The coil 31 is wound around the fixed iron core 32 via a resin winding device 31a.

As shown in FIG. 2, the movable iron core 33 includes a pair of valve pressing portions 33 a extending toward the valve guide 21. The valve guide 21 abuts on a pair of valve pressing portions 33 a as a part of the movable iron core 33 in the moving direction of the valve body 20. In a state where the movable iron core 33 is urged toward the valve chamber 13 by the urging spring 34, the valve pressing portion 33a presses the valve guide 21, thereby pressing the valve element 20 to the valve seat 12e.

As shown in FIGS. 3 and 4, when power is supplied to the coil 31, the coil 31 is excited, and a magnetic flux passing through the magnetic frame 17, the fixed iron core 32, and the movable iron core 33 is generated around the coil 31. Then, the fixed core 32 is attracted by the exciting action of the coil 31, the movable core 33 is attracted to the fixed core 32 against the elastic thrust of the elastic spring 34, and the valve core 20 is driven from the valve seat by the elastic thrust of the core spring 15. 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, the supply port 11a and the output port 11b are communicated through the supply passage 14a, the valve chamber 13, and the output passage 14b, and the output port 11b and the discharge port 11c are blocked through the output passage 14b and 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 power to the coil 31 is stopped, the attractive force of the fixed core 32 generated by the exciting action of the coil 31 disappears, and the movable core 33 is fixed by the elastic force of the elastic spring 34. The core 32 moves in the direction of separation. In addition, the valve pressing portion 33a of the movable iron core 33 pushes the valve guide 21 and the valve body 20 toward the valve seat 12e against the elastic pushing force of the valve body 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, the output port 11b and the discharge port 11c are communicated through the output passage 14b, the valve chamber 13, and the discharge passage 14c, and the supply port 11a and the output port 11b are blocked through the supply passage 14a and the valve. The communication between the chamber 13 and the output path 14b.

A mounting recess 12 a is formed in the end face of the plug 12 on the side opposite to the electromagnetic portion 30. A pair of insertion holes 12 b extending in the moving direction of the valve body 20 are formed on the bottom surface of the mounting recess 12 a. A pair of insertion holes 12b are opened in the valve chamber 13 and are arranged around the valve seat 12e.

An adapter 40 is mounted in the mounting recess 12a. The adapter 40 is disposed on the side opposite to the movable iron core 33 with respect to the plug 12 in the moving direction of the valve body 20. The adapter 40 has a flat plate-shaped body portion 40a and a pair of abutment portions 40b. The flat plate-shaped body portion 40a is received in the mounting recess 12a; the pair of abutment portions 40b protrude from the body portion 40a and are respectively inserted in A pair of insertion holes 12b. As described above, the adapter 40 has a plurality of abutment portions 40b. Each abutment portion 40 b is inserted into each of the insertion holes 12 b and protrudes into the valve chamber 13.

Each abutment portion 40 b of the adapter 40 is guided by each insertion hole 12 b and is movable in the moving direction of the valve body 20. The front end portion of each abutment portion 40 b is arranged to face the cylindrical portion 21 a of the valve guide 21 in the moving direction of the valve body 20. The pair of abutment portions 40 b may abut on the valve guide 21 and abut on both sides of the valve body 20 in a direction orthogonal to the moving direction of the valve body 20. A manual spring 40c exists between the bottom surface of the mounting recess 12a and the main body portion 40a of the adapter 40. The manual spring 40c moves the adapter 40 with respect to the plug 12 and the valve guide in the moving direction of the valve core 20. The opposite side of 21 bounced.

As shown in FIG. 1, the body portion 40 a of the adapter 40 includes an elastic portion 41. The elastic portion 41 is a plate shape formed by bending, and is made of a resin that can be elastically deformed. The elastic portion 41 includes a plate-shaped inclined portion 41 a and a plate-shaped flat portion 41 b. The plate-shaped inclined portion 41 a continues to the end surface of the main body portion 40 a on the side opposite to the abutting portion 40 b and is resilient to the elasticity of the elastic spring 34. The pushing direction is inclined; the plate-shaped flat portion 41 b continues in the inclined portion 41 a and is opposite to the main body portion 40 a and extends in a direction orthogonal to the pushing direction of the pushing spring 34. The inclined portion 41 a extends linearly from the edge of the main body portion 40 a toward the central portion of the main body portion 40 a so as to gradually separate from the movable core 33 in the moving direction of the spool 20; the flat portion 41 b extends in the moving direction of the spool 20 The upper portion is arranged to face the central portion of the main body portion 40a.

As shown in FIGS. 1 and 2, the solenoid valve 10 includes a manual shaft 42 that can be manually operated, and a housing 43 attached to the plug 12. The housing 43 is mounted on an end surface of the plug 12 on the side opposite to the electromagnetic portion 30 on a side surface close to the bottom side of the main body 11. The housing 43 includes an opposing wall 43 a that faces the flat portion 41 b 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 facing wall 43a. The housing 43 holds the manual shaft 42 so as to be able to move back and forth in a direction orthogonal to the moving direction of the valve body 20. The manual shaft 42 is held by the housing 43 so that its insertion portion 42 e can be moved in and out between the flat portion 41 b and the facing wall 43 a.

The state where the insertion portion 42e of the manual shaft 42 protrudes most between the flat portion 41b and the facing wall 43a is an initial state before the manual operation of the manual shaft 42 by the operator. In addition, when the user manually operates the manual shaft 42 by pressing it toward the housing 43 in a direction orthogonal to the moving direction of the valve body 20 from the initial state, the insertion portion 42e of the manual shaft 42 is submerged into the flat portion 41b and opposed to the flat portion 41b. Towards the wall 43a. Therefore, the operating direction of the manual shaft 42 is a direction in which the manual shaft 42 is pressed toward the housing 43 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 between the flat portion 41b and the facing wall 43a, and is a state in which an operator manually operates an operation amount (pressing amount) predetermined by the manual shaft 42 from an initial state.

As shown in FIG. 1, the insertion portion 42 e of the manual shaft 42 has a pressing surface 42 a which extends along the outer surface of the inclined portion 41 a and slides on the outer surface of the inclined portion 41 a to connect the adapter. 40 is pushed toward the valve guide 21. In addition, the insertion portion 42e of the manual shaft 42 has a contact surface 42b which continues from the side opposite to the direction in which the manual shaft 42 is operated from the initial state among the pressing surfaces 42a, and extends along the outer surface of the flat portion 41b. When the manual operation of the manual shaft 42 is performed on a predetermined amount of operation, the outer surface of the flat portion 41 b is mounted on the outer surface of the flat portion 41 b and comes into surface contact with the outer surface of the flat portion 41 b. Therefore, the adapter 40 can move in the moving direction of the spool 20 as the manual operation of the manual shaft 42 is pushed by the manual shaft 42.

As shown in FIG. 2 and FIG. 4, when the manual shaft 42 is in an initial state, the adapter 40 is elastically pushed to the opposite side of the plug 12 and the valve guide 21 by the elastic pushing force of the manual spring 40 c, and a pair of the The connection portion 40 b is separated from the valve guide 21.

Next, the operation 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 42 a is in sliding contact with the outer surface of the inclined portion 41 a and presses the adapter 40 toward the valve guide 21. In this way, the adapter 40 moves toward the valve guide 21 against the spring force of the manual spring 40c, and the pair of abutment portions 40b abut against the valve guide 21 in a direction orthogonal to the movement direction of the valve core 20. The two sides of the valve core 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 pushing force of the elastic spring 34. At this time, the pair of abutment portions 40b abut the valve guide 21 and both sides of the valve core 20 in the direction orthogonal to the moving direction of the valve core 20, and thus the valve guide 21 and the movable iron core 33 is pushed, the valve guide 21 and the movable iron core 33 are difficult to incline with respect to the moving direction of the valve element 20.

Therefore, by manually operating the manual shaft 42, the pressing force that presses the movable iron core 33 toward the fixed iron core 32 against the elastic pushing force of the elastic spring 34 acts on the movable iron core 33. Then, as the valve guide 21 moves toward the fixed iron core 32, the valve element 20 moves by the spring force of the valve element spring 15 to switch the flow path. Therefore, the outer surface of the inclined portion 41 a becomes a transmission surface 41 c which is inclined with respect to the direction of the elastic pushing of the elastic spring 34 and transmits the movable iron core 33 to the fixed iron core 32 by manual operation of the manual shaft 42. The pressing force of the movable iron core 33.

In addition, 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 until the manual shaft 42 reaches a predetermined operation amount to allow manual operation of the manual shaft 42. When the manual operation amount of the manual shaft 42 is manually operated, the contact surface 42 b is placed on the outer surface of the flat portion 41 b and comes into surface contact with the outer surface of the flat portion 41 b. Thereby, the urging force of the urging spring 34 is transmitted to the outer surface of the flat portion 41b and received by the contact surface 42b. Therefore, the outer surface of the flat portion 41b becomes a flat surface 41d for transmitting the elastic force of the elastic spring 34 when the manual operation amount of the manual shaft 42 is manually operated. At this time, since the elastic pushing force of the elastic spring 34 does not act on the transmission surface 41c, it does not act on the manual shaft 42. The elastic force of the elastic spring 34 pushes the manual shaft 42 in a direction opposite to the direction in which the manual shaft 42 is operated from the initial state. Back force. Therefore, when the manual operation amount of the manual shaft 42 is manually operated from the initial state, the manual shaft 42 is held (locked) by itself, and the state of switching the flow path is maintained. In this way, the operation of the solenoid valve 10 can be confirmed without supplying power to the coil 31.

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

(1) The solenoid valve 10 includes an elastic portion 41. Even when the manual shaft 42 is manually operated, the movable iron core 33 abuts against the fixed iron core 32, and the manual shaft 42 can be tolerated until the manual shaft 42 reaches a predetermined operation amount. 42 manual operation. Therefore, during the manual operation of the manual shaft 42 by the operator, it is not necessary to prevent the movable iron core 33 from abutting against the fixed iron core 32 and to increase the stroke of the movable iron core 33 in advance. As a result, the power supply to the coil 31 required to attract the movable core 33 toward the fixed core 32 can be suppressed.

(2) The solenoid valve 10 includes a plug 12, a valve guide 21, and an adapter 40, and the adapter 40 includes a contact portion 40 b capable of contacting the valve guide 21. The adapter 40 includes an elastic portion 41. Such a configuration is suitable as a configuration of the solenoid valve 10 capable of confirming the operation of the solenoid valve 10 without supplying power to the coil 31.

(3) The elastic portion 41 includes a transmitting surface 41c and a flat surface 41d. The manual shaft 42 includes a pressing surface 42 a and a contact surface 42 b. Therefore, when the adaptor 40 is provided with the elastic portion 41, by manually operating the manual shaft 42, the pressing surface 42a presses the transmitting surface 41c, and the pressing of the movable iron core 33 toward the fixed iron core 32 is transmitted toward the movable iron core 33. The pressure causes the movable iron core 33 to move toward the fixed iron core 32 to move the valve core 20 and switch the flow path. In addition, when the manual operation amount of the manual shaft 42 is manually operated, the urging force of the urging spring 34 is transmitted to the flat surface 41d and received by the contact surface 42b. Thereby, the force which pushes the manual shaft 42 in the opposite direction to the direction in which the manual shaft 42 is operated from the initial state is not caused by the spring force of the manual shaft 42 by the spring force of the spring 34 of the manual shaft. When the operation amount of the manual shaft 42 is maintained, the state of switching the flow path is maintained.

(4) The adapter 40 has a pair of abutment portions 40b, and the pair of abutment portions 40b can abut on the valve guide 21 to sandwich the valve body 20 in a direction orthogonal to the moving direction of the valve body 20 On both sides. Therefore, compared with the case where only one abutment portion 40b is provided on the adapter 40 and only one abutment portion 40b abuts on the valve guide 21, the valve guide 21 and the movable iron core can be made. 33 is difficult to incline with respect to the moving direction of the spool 20. Therefore, since it is not necessary to increase the stroke of the movable iron core 33 in advance for the inclined portion of the valve guide 21 and the movable iron core 33, it is possible to further suppress the amount of power supplied to the coil 31 required to attract the movable iron core 33 toward the fixed iron core 32.

(5) If the pair of abutment portions 40b are in contact with the valve guide 21 when the manual shaft 42 is in an initial state, the pair of abutment portions 40b will prevent the valve guide 21 from moving toward the valve seat 12e, so that the valve element 20 is not seated on the valve seat 12e, and there is a possibility of causing poor sealing. Therefore, when the manual shaft 42 is in an initial state, the adaptor 40 is urged to the opposite side with respect to the plug 12 and the valve guide 21 by the elastic pushing force of the manual spring 40c, and the pair of abutment portions 40b are removed from the valve guide 21 separation. Since the pair of abutment portions 40b does not block the movement of the valve guide 21 toward the valve seat 12e, the valve body 20 can be seated on the valve seat 12e reliably, and good sealing performance can be maintained.

(6) The housing 43 holds the manual shaft 42 so as to be able to move back and forth in a direction orthogonal to the moving direction of the valve body 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) Due to the elastic deformation of the elastic portion 41, manual operation of the manual shaft 42 is allowed. During the manual operation of the manual shaft 42, excess force will not act on the manual shaft 42, the adapter 40, the valve guide 21, etc. Therefore, the durability of each component can be improved.

(8) In the present embodiment, when the manual shaft 42 is manually operated, the valve guide 21 is difficult to tilt with respect to the moving direction of the valve element 20, so that the valve element 20 can be reliably seated on the valve seat 11e, and a good Tightness.

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

(Second Embodiment)

Hereinafter, a second embodiment embodying the solenoid valve will be described with reference to FIGS. 7 and 8. In the embodiments described below, the same components as those of the first embodiment described above are denoted by the same reference numerals, and redundant descriptions are omitted or abbreviated. The solenoid valve of 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, one of the manual shaft and the adapter may have an elastic portion.

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

The manual shaft 42 includes 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 51 a that extends along the first surface 50 a and slides into contact with the first surface 50 a to press the adapter 40 toward the valve guide 21. In addition, the elastic portion 51 has a contact surface 51 b that continues from the pressing surface 51 a on the opposite side from the initial operation of the manual shaft 42, and extends along the second surface 50 b and is manually operated on the manual shaft 42. When a predetermined operation amount is reached, the second surface 50b is brought into contact with the second surface 50b. The elastic portion 51 is inserted between the adapter 40 and the facing wall 43a.

Next, an effect of the second embodiment will be described.

When the manual shaft 42 is manually operated from the initial state, the pressing surface 51 a slides the adapter 40 toward the valve guide 21 while slidingly contacting the first surface 50 a. In this way, the adapter 40 moves toward the valve guide 21 against the spring force of the manual spring 40c; the pair of abutment portions 40b abut on the valve guide 21 in a direction orthogonal to the moving direction of the valve core 20 The two sides of the valve core 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 pushing force of the elastic spring 34.

Therefore, by manually operating the manual shaft 42, the pressing force pressing the movable iron core 33 toward the fixed iron core 32 against the elastic pushing force of the elastic spring 34 acts on the movable iron core 33. Then, as the valve guide 21 moves toward the fixed iron core 32, the valve element 20 moves by the spring force of the valve element spring 15 to switch the flow path. Accordingly, the pressing surface 51 a of the elastic portion 51 functions as a transmitting surface which is inclined with respect to the direction of the elastic pushing of the elastic 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 pressed.

In addition, 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 until the manual shaft 42 reaches a predetermined operation amount to allow manual operation of the manual shaft 42. Then, when the manual operation amount of the manual shaft 42 is manually operated, the contact surface 51b comes up on the second surface 50b and comes into contact with the second surface 50b. Thereby, the urging force of the urging spring 34 is transmitted to the second surface 50b and received by the contact surface 51b. Therefore, the contact surface 51b of the elastic portion 51 becomes a flat surface, and the flat surface is transmitted with the elastic pushing force of the elastic spring 34 when the manual operation amount of the manual shaft 42 is manually operated. At this time, since the elastic pushing force of the elastic spring 34 does not act on the pressing surface 51a, it does not act on the manual shaft 42. The elastic force of the elastic spring 34 pushes back to the manual direction opposite to the direction of operation from the initial state The force of the shaft 42. Therefore, when the manual operation amount of the manual shaft 42 is manually operated from the initial state, the manual shaft 42 is held (locked) by itself, and the state of switching the flow path is maintained. 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 embodying the solenoid valve will be described with reference to FIGS. 9 and 10.

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

The first body 611 is formed with an air supply port 61a and an output port 61b. A valve chamber 62 that houses the valve body 70 is formed in the first body 611. The valve chamber 62 communicates with the air supply port 61a and the output port 61b. In the first body 611, a valve seat 61e is formed around the opening of the output port 61b toward the valve chamber 62 in the end surface facing the valve chamber 62, and the valve body 70 is seated thereon. The valve body 70 is detachable from the valve seat 61e.

A magnetic frame 63 is embedded in the second body 612. The electromagnetic unit 80 includes a coil 81 that is disposed inside the magnetic frame 63, a columnar fixed iron core 82 that is fixedly provided inside the coil 81, and a movable iron core 83 that is adsorbed and fixed by supplying power to the coil 81 Iron core 82; an elastic spring 84 that urges the movable iron core 83 in a direction separated 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 second body 612 into the intermediate body 613. The end surface on the intermediate body 613 side of the fixed core 82 is fitted to the open end on the intermediate body 613 side of the first body 611. The valve chamber 62 is divided by a first body 611 and a fixed iron core 82.

A valve guide 71 having a bottomed cylindrical shape is housed in the valve chamber 62, and is arranged around the valve core 70 to guide the valve core 70. The valve guide 71 has a columnar projecting portion 71 a that penetrates the fixed iron core 82 and abuts the movable iron core 83. A restriction ring 64 is attached to an inner surface of the valve chamber 62 formed in the first body 611. The spring spring 84 exists between the restriction ring 64 and the valve guide 71, and urges the movable iron core 83 in a direction separated from the fixed iron core 82 via the valve guide 71.

A valve core spring 65 exists between the valve guide 71 and the valve core 70, and it urges the valve core 70 toward the valve seat 61e. In addition, the valve guide 71 has a restricting protrusion 71f that restricts the movement of the valve body 70 toward the valve seat 61e.

When power is supplied to the coil 81, the coil 81 is excited, and a 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 fixed iron core 82 is attracted by the exciting action of the coil 81, the movable iron core 83 is attracted to the fixed iron core 82 against the elastic force of the elastic spring 84, and the valve guide 71 is pushed by the movable iron core 83 toward the fixed iron core 82 Move in the direction of separation. The valve body 70 is moved toward the valve seat 61e by the elastic force of the valve body spring 65, and is seated on the valve seat 61e. Thereby, the output port 61 b is closed, and communication between the air supply port 61 a and the output port 61 b via the valve chamber 62 is blocked.

When the supply of power to the coil 81 is stopped, the attractive force of the fixed core 82 caused by the exciting action of the coil 81 will disappear, and the movable core 83 will move in a direction separated from the fixed core 82 due to the elastic force of the elastic spring 84. At this time, although the valve body spring 65 urges the valve body 70 toward the valve seat 61e, the restriction protrusion 71f restricts the movement of the valve body 70 to the valve seat 61e, thereby maintaining the valve body 70 in a state 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.

A mounting recess 61 c is formed in an end surface of the second body 612 opposite to the first body 611. An adapter 85 is attached to the attachment recess 61 c. The adapter 85 is in contact with an end surface on the opposite side of the movable iron core 83 from the fixed iron core 82. The adapter 85 is movable in the moving direction of the valve body 70 in the mounting recess 61 c.

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

The solenoid valve 60 includes a manual shaft 86 that can be manually operated, and a housing 87 attached to the second body 612. The housing 87 has a facing wall 87 a which is arranged to face the adapter 85 in the moving direction of the valve body 20. The manual shaft 86 includes an elastic portion 91. The elastic portion 91 is formed in a curved plate shape and is made of a resin that can be elastically deformed. The elastic portion 91 has a pressing surface 91 a which extends along the first surface 85 a and slides into contact with the first surface 85 a to press the adapter 85 toward the valve guide 71. In addition, the elastic portion 91 has a contact surface 91b that continues from 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 operates the manual shaft 86 manually. When a predetermined operation amount is reached, the second surface 85b is brought into contact with the second surface 85b. The elastic portion 91 is inserted between the adapter 85 and the facing wall 87a.

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

Next, an effect of the third embodiment will be described.

When the manual shaft 86 is manually operated from the initial state, the pressing surface 91 a slides onto the first surface 85 a and simultaneously presses the adapter 85 toward the valve guide 71. In this way, the adapter 85 and the movable iron core 83 move toward the fixed iron core 82 against the elastic pushing force of the elastic spring 84, and the valve guide 71 is pushed by the movable iron core 83 and moves in a direction separated from the fixed iron core 82. The valve body 70 is moved to the valve seat 61e by the elastic force of the valve body spring 65 to switch the flow path.

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

In addition, even during the manual operation of the manual shaft 86, the movable iron core 83 abuts against the fixed iron core 82, and until the manual shaft 86 reaches a predetermined operation amount, the elastic portion 91 is elastically deformed to allow manual operation of the manual shaft 86. In addition, when a predetermined operation amount of the manual shaft 86 is manually operated, the contact surface 91b comes on the second surface 85b and comes into contact with the second surface 85b. Thereby, the urging force of the urging spring 84 is transmitted to the second surface 85b and received by the contact surface 91b. Thereby, the contact surface 91b of the elastic portion 91 becomes a flat surface, and the flat surface is transmitted with the elastic pushing force of the elastic spring 84 when the manual operation amount of the manual shaft 86 is manually operated. At this time, since the elastic pushing force of the elastic spring 84 does not act on the pressing surface 91a, it does not act on the manual shaft 86 to be pressed back by the elastic pushing force of the elastic spring 84 in the direction opposite to the direction of operation from the initial state. Force of manual shaft 86. Therefore, when the predetermined amount of operation of the manual shaft 86 is manually operated from the initial state, the manual shaft 86 is held (locked) by itself to maintain the state of switching the flow path. According to the third embodiment, the same effect as the effect described in (1) of the first embodiment can be obtained.

(Fourth Embodiment)

Hereinafter, a fourth embodiment embodying the solenoid valve will be described 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 spool 20 with the rotation axis and is held on the housing 43 so as to be rotatable with the rotation axis as the rotation center. Therefore, the operation direction of the manual shaft 95 is a rotation direction with a rotation axis extending in a direction orthogonal to the moving direction of the spool 20 as a rotation center. The manual shaft 95 includes a cylindrical operation portion 96 and a facing portion 97 that continues from the operation portion 96 and is partially disposed to face the elastic portion 98. As shown in FIG. 11 and FIG. 13, the facing portion 97 includes a pressing surface 97 a which is arranged to face the elastic portion 98 when the manual shaft 95 is in an initial state, and a contact surface 97 b which is provided by an operator from an early stage. State Manual Operation When the manual operation amount (rotation amount) of the manual shaft 95 is predetermined, the elastic portion 98 is mounted on the elastic portion 98 and comes into 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 96 a into which the rotation restriction pin 99 is inserted. The rotation restricting pin 99 is fixed to the case 43, for example. The groove portion 96a has a first rotation restricting surface 961a which is arranged to face the outer periphery of the rotation restricting pin 99 when the manual shaft 95 is in an initial state, and a second rotation restricting surface 962a which manually operates the manual shaft 95 from an initial state by an operator The predetermined operation amount is arranged to face the outer periphery of the rotation restriction pin 99. The first rotation restriction surface 961a and the second rotation restriction surface 962a extend in directions orthogonal to each other.

When the predetermined operation amount of the manual shaft 95 is manually operated from the initial state shown in FIG. 12 (b) as shown in FIG. 14 (b), the second rotation restriction surface 962 a and the outer periphery of the rotation restriction pin 99 face each other.向 Configure. 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 manual operation of the manual shaft 95, and restricts rotation of the manual shaft 95.

In addition, when returning the manual shaft 95 to the initial state from the state where the manual operation amount of the manual shaft 95 is predetermined to be manually operated, it is necessary to manually operate the manual shaft 95 from the initial state to the predetermined operation amount. Manual operation is performed in the opposite direction to the operation direction of. In this way, the first rotation restricting surface 961 a faces the outer peripheral surface of the rotation restricting pin 99. 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, thereby restricting the manual operation of the manual shaft 95 and restricting the rotation of the manual shaft 95. In this embodiment, the rotation of the manual shaft 95 is performed within a range of 90 degrees with the rotation axis as the rotation center.

When the manual shaft 95 is manually operated from the initial state, the pressing surface 97a presses the elastic portion 98. In this way, the adapter 40 moves toward the valve guide 21 against the spring force of the manual spring 40c; the pair of abutment portions 40b abut on the valve guide 21 in a direction orthogonal to the moving direction of the valve core 20 The two sides of the valve core 20 are sandwiched in the direction of the direction, and the valve guide 21 and the movable iron core 33 are pushed toward the fixed iron core 32 against the elastic pushing force of the elastic spring 34. Then, as the valve guide 21 moves toward the fixed iron core 32, the valve element 20 moves by the spring force of the valve element spring 15 to switch the flow path.

Even when the manual shaft 95 is manually operated, the movable iron core 33 abuts against the fixed iron core 32, and until the manual shaft 95 reaches a predetermined operation amount, the elastic portion 98 is elastically deformed to allow manual operation of the manual shaft 95. When the manual operation amount of the manual shaft 95 is determined in advance, the contact surface 97 b comes up on the elastic portion 98 and comes into surface contact with the elastic portion 98. Thereby, the elastic pushing force of the elastic spring 34 is transmitted to the contact surface 97b and received by the contact surface 97b. Therefore, the force of the elastic force of the elastic spring 34 pushing the manual shaft 95 in a direction opposite to the direction of operation from the initial state is difficult to act on On the manual shaft 95. Therefore, when the manual operation amount of the manual shaft 95 is manually operated from the initial state, the manual shaft 95 is held (locked) by itself, and the state of switching the flow path is maintained. According to the fourth embodiment, the same effect as the effect described in (1) of the first embodiment can be obtained.

In addition, each of 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 there are three or more abutting portions 40b, as long as at least two of the plurality of abutting portions 40b, the valve guide 21 can be abutted in a direction orthogonal to the moving direction of the valve body 20. The two sides of the spool 20 may be clamped.

In the first and second embodiments, for example, when the manual shaft 42 is in an initial state, the pair of abutment portions 40 b may be in contact with the valve guide 21.

In each of the above embodiments, the operating directions of the manual shafts 42 and 86 may be, for example, a rotation direction in which the rotation center is along the moving direction of the spool 20.

10, 60‧‧‧ Solenoid valve

11, 61‧‧‧ Ontology

12‧‧‧ plug

12e‧‧‧Valve seat

13‧‧‧valve

20, 70‧‧‧ spool

21, 71‧‧‧ valve guide

30, 80‧‧‧ Electromagnetic Department

31, 81‧‧‧ coil

32, 82‧‧‧Fixed iron core

33, 83‧‧‧movable iron core

34, 84‧‧‧ spring

40, 85‧‧‧ adapter

40b‧‧‧ abutment department

40c‧‧‧Manual spring

41, 51, 91, 98‧‧‧ Elastic section

41c‧‧‧ Communication

41d‧‧‧ flat surface

42, 86, 95‧‧‧ manual shaft

42a‧‧‧Pressing surface

42b‧‧‧contact surface

43‧‧‧Shell

51a, 91a ‧ ‧ ‧ Pushing surfaces that function as communication surfaces

51b, 91b ‧‧‧ are contact surfaces that are flat surfaces.

FIG. 1 is a sectional view showing a solenoid valve in a first embodiment. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1. FIG. 3 is a cross-sectional view showing a state where power is supplied to a coil of an electromagnetic unit. FIG. 4 is a sectional view taken along line 4-4 in FIG. 3. FIG. 5 is a sectional view showing a state where a manual shaft is manually operated with a preset operation amount. FIG. 6 is a sectional view taken along line 6-6 in FIG. 5. 7 is a cross-sectional view showing a solenoid valve in a second embodiment. FIG. 8 is a cross-sectional view showing a state where a manual shaft is manually operated with a preset operation amount. FIG. 9 is a cross-sectional view showing a solenoid valve in a third embodiment. FIG. 10 is a sectional view showing a state where a manual shaft is manually operated with a preset 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 in FIG. 11; FIG. 12 (b) is a cross-sectional view around the rotation restricting pin. FIG. 13 is a cross-sectional view showing a state where a manual shaft is manually operated with a preset operation amount. FIG. 14 (a) is a cross-sectional view taken along line 14-14 in FIG. 13; FIG. 14 (b) is a cross-sectional view around the rotation restricting pin.

Claims (6)

A solenoid valve is provided with a valve core for switching a flow path formed in a body, an electromagnetic part for moving the valve core, and a manual shaft for manual operation. The electromagnetic part includes: a coil; a fixed iron core; An iron core that is attracted to the fixed iron core by supplying power to the coil; and an elastic spring that pushes the movable iron core in a direction separated from the fixed iron core and manually operates the manual shaft to resist the foregoing When the elastic pushing force of the elastic spring pushes the movable iron core toward the fixed iron core and acts on the movable iron core, the movable iron core moves toward the fixed iron core, so that the valve core moves to switch the flow path, and from an initial state When the manual shaft is manually operated with a predetermined operation amount, the manual shaft is held by itself and is provided with an elastically deformable elastic portion. Even when the elastically deformable elastic portion is manually operated, the movable iron core abuts on The fixed iron core can also allow the manual shaft until the manual shaft reaches the operation amount. Moving operation. The solenoid valve according to claim 1, further comprising: a plunger which, together with the main body, divides a valve chamber accommodating the valve element and has a valve seat on which the valve element seats; a cylindrical valve guide, It is housed in the valve chamber, is arranged around the valve element, guides the valve element, and abuts the movable core in the moving direction of the valve element; and an adapter in the moving direction of the valve element. The upper part is disposed on the opposite side of the plug post and the movable iron core and can be moved in the moving direction of the valve core by the manual shaft in accordance with the manual operation of the manual shaft; the adapter has abutment against the foregoing One of the contact portion of the valve guide, 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, the transmitting surface is inclined with respect to an elastic pushing direction of the elastic spring, and is manually adjusted by the manual operation. The manual operation of the shaft transmits the pressing force to the movable iron core; the flat surface continues the direction of operating the manual shaft from the initial state among the transmitting surfaces, and is orthogonal to the direction of the spring pushing by the spring, In the initial state, the manual force of the manual shaft is transmitted when the manual operation of the manual shaft is performed. The manual shaft includes a pressing surface and a contact surface. The pressing surface extends along the transmission surface and slides on the transmission surface. While pushing the adapter toward the valve guide, the contact surface continues from the side opposite to the direction in which the manual shaft is operated from the initial state, and extends along the flat surface and extends from the In the initial state, when the manual shaft is manually operated, the operation amount is mounted on the flat surface and comes into contact with the flat surface. The solenoid valve according to claim 2 or claim 3, wherein the adapter has a plurality of the contact portions, and at least two of the plurality of contact portions can abut the valve guide against the valve guide. The two sides of the valve element are sandwiched in a direction orthogonal to the moving direction of the valve element. The solenoid valve according to claim 2 or claim 3, further comprising: a manual spring that moves the adapter in a direction in which the valve element is moved to an opposite side from the plug post and the valve guide. When the manual shaft is in an initial state, the adapter is elastically pushed to the opposite side of the plunger and the valve guide by the manual pushing force of the manual spring, and the abutting portion is pushed from the foregoing The valve guide is separated. The solenoid valve according to claim 2 or claim 3, further comprising: a housing mounted on the plunger, and the housing holding the manual shaft so as to be orthogonal to a moving direction of the spool. Move back and forth in the direction.