JP6650698B2 - Actuator for solenoid valve and solenoid valve - Google Patents

Description

The present invention relates to an electromagnetic valve actuator capable of latching a movable core with a permanent magnet (restricting the sliding of the movable core) , and an electromagnetic valve including such an electromagnetic valve actuator.

  As a solenoid valve provided with this type of solenoid valve actuator, a latch-type solenoid valve (hereinafter, also simply referred to as “solenoid valve”) is disclosed in Patent Document 1 below. In this solenoid valve, a guide pipe is inserted into a center hole of a bobbin around which an exciting coil is wound, and a fixed core (core member) is inserted into one end of the guide pipe, and a movable core to which a valve body is attached. (Plunger) is inserted into the other end of the guide pipe. Further, in this solenoid valve, a permanent magnet for latching is disposed on one end side of the guide pipe so as to be in contact with the fixed core, and the yoke member and the seat member are integrated so that the bobbin and the permanent magnet are integrated. It is arranged. In the following description, a magnetic path forming element including a yoke member and a sheet member is also referred to as a “yoke”. Further, a linear motion mechanism including a bobbin, an exciting coil, a guide pipe, a fixed core, a movable core, a permanent magnet, and a yoke is also referred to as an “actuator”.

  On the other hand, Patent Literature 2 below discloses a self-holding linear motion actuator (hereinafter, also simply referred to as “actuator”) that can be used as a linear motion mechanism for an electromagnetic valve. In this actuator, an excitation coil (electromagnetic coil) wound around a coil bobbin (hereinafter, also simply referred to as a “bobbin”), a fixed core (fixed iron core) inserted at one end of a bobbin center hole, and a bobbin A movable core (movable iron core: plunger) inserted at the other end of the center hole, a latch permanent magnet disposed at the other end of the bobbin, and a bobbin and the permanent magnet are arranged so as to surround the bobbin and the permanent magnet. And a valve body is attached to the lower end of the movable core.

  In an actuator having a permanent magnet for latching as in the above two actuators, current is supplied to the exciting coil only when the movable core is moved with respect to the fixed core, and the movable core is separated from the fixed core. When the movable core is maintained in a state where the movable core is in contact with the fixed core, the movement of the movable core can be restricted by the magnetic force of the permanent magnet. As a result, in the solenoid valve provided with this type of actuator, it is possible to maintain the valve closed state and the valve open state without continuously supplying current to the exciting coil.

JP-A-2007-40389 (pages 4 to 5, FIG. 1-3) JP-A-2003-21256 (pages 4-6, FIG. 1-6)

  However, the actuators disclosed in the above patent documents have the following problems. That is, in the actuator in the solenoid valve disclosed in Patent Document 1, the bobbin around which the exciting coil is wound and the permanent magnet for latch provided at the end of the bobbin on the fixed core side are integrated. A yoke is provided. In the actuator disclosed in Patent Document 2, the bobbin around which the exciting coil is wound and the permanent magnet for latch provided at the end of the bobbin on the movable core side are integrated (bobbin and A yoke is arranged (to accommodate a permanent magnet).

  In this case, in the solenoid valve including the latch type actuator, as described above, the movement of the movable core is regulated (latched) by the magnetic force of the permanent magnet in the valve open state and the valve closed state. For this reason, for example, in an environment in which it is necessary to always switch to the valve-closed state when power is lost, an actuator that does not have a permanent magnet for latching (hereinafter referred to as a “latch-type actuator (electromagnetic valve)” It is necessary to use an electromagnetic valve configured to include an “unlatched actuator (solenoid valve)”.

  However, in the solenoid valve provided with the actuator disclosed in the above-mentioned patent documents, the yoke is provided so as to integrate the bobbin and the permanent magnet for the latch. Therefore, in order to manufacture a non-latch type solenoid valve, in order to manufacture a non-latch type actuator having no permanent magnet for latch by modifying the configuration of both actuators, it is necessary to eliminate the permanent magnet. It is necessary to change the size and shape of the bobbin and yoke in consideration of the space. Therefore, in the actuators disclosed in the above-mentioned patent documents, a design work is newly performed when manufacturing a non-latch type actuator, and the shape and size are different from the bobbin and the yoke in the latch type actuator. Since it is necessary to prepare the bobbin and the yoke separately, there is a problem that it is difficult to reduce the manufacturing cost.

  The present invention has been made in view of such problems, and includes an electromagnetic valve actuator that can reduce the manufacturing cost of a latch-type electromagnetic valve and a non-latch-type electromagnetic valve, and includes such an electromagnetic valve actuator. The main purpose is to provide a solenoid valve.

In order to achieve the above object, an actuator for an electromagnetic valve according to claim 1, wherein a conducting wire is wound around a cylindrical portion to form an exciting coil, and the bobbin is inserted into one end of the cylindrical portion to form the exciting coil. A fixed core that is restricted from sliding with respect to the bobbin, a movable core that is slidable with respect to the bobbin, and that is inserted into the other end of the cylindrical portion, and an insertion through which the other end of the cylindrical portion can be inserted. And a yoke integrated with the bobbin to form a magnetic path in a state where the cylindrical portion is inserted through the insertion hole, and an end of the movable core opposite to the fixed core. an actuator solenoid valve that is configured to be able to mount the valve body part, the supply of current to the exciting coil is stopped in a state in which the movable core has been slid to a position away from the stationary core Come, and the movable core is a permanent magnet for regulating the sliding of the movable core in said cylindrical portion when the supply of current to the exciting coil is stopped in a state of being slid to a position in contact with the stationary core An outer surface of the yoke is detachably attached around the insertion hole.

  Also, in the actuator for an electromagnetic valve according to the second aspect, in the actuator for an electromagnetic valve according to the first aspect, the movable core is fixed by being excited by the excitation coil when the permanent magnet is attached to the yoke. When the inside of the cylindrical portion is slid to a position away from the core, the end opposite to the fixed core side is opposite to the yoke side with respect to the back surface of the surface of the permanent magnet contacting the yoke. The length between the end portion on the fixed core side and the end portion on the opposite side to the fixed core side is defined so as to be located at the position.

Furthermore, in the actuator for a solenoid valve according to the third aspect, in the actuator for the solenoid valve according to the first or second aspect, when the permanent magnet is attached to the yoke, the permanent magnet is any one of a surface that contacts the yoke and a back surface thereof. It is composed of a ring magnet magnetized such that one surface is an S pole and the other surface is an N pole .

Further, in the actuator for an electromagnetic valve according to the fourth aspect , in the actuator for the electromagnetic valve according to any one of the first to third aspects, an urging member for urging the movable core in a direction to separate the movable core from the fixed core. It has.

According to a fifth aspect of the present invention, there is provided an electromagnetic valve including the electromagnetic valve actuator according to any one of the first to fourth aspects, and a valve body attached to the movable core.

In the actuator for an electromagnetic valve according to the first aspect, the movable core in the cylindrical portion is latched around the insertion hole on the outer surface of the yoke (the slide of the movable core is restricted in a state where the current supply to the exciting coil is stopped). Permanent magnet) is removably mounted. According to a fifth aspect of the present invention, there is provided an electromagnetic valve including the above-described actuator for an electromagnetic valve and a valve body attached to a movable core. Therefore, according to the solenoid valve actuator of the first aspect and the solenoid valve of the fifth aspect, unlike the solenoid valve actuator in which the latching permanent magnet is disposed inside the yoke, the permanent magnet is used. With the exception that each component is shared and a permanent magnet is attached to the yoke, it can be used as a latch-type solenoid valve actuator, and a non-latching type can be used by not attaching a permanent magnet to the yoke. It can be used as an actuator for a solenoid valve. For this reason, in the solenoid valve actuator and the solenoid valve, it is not necessary to newly perform design work when manufacturing the non-latching type actuator, and the shape and size are common to the bobbin and the yoke in the latching type actuator. As a result of using the bobbin and the yoke, the manufacturing costs of the latch type solenoid valve and the non-latch type solenoid valve can be sufficiently reduced.

  According to the solenoid valve actuator according to claim 2 and the solenoid valve provided with the solenoid valve actuator, the end portion opposite to the fixed core side when slid to a position away from the fixed core. Between the fixed core side end of the movable core and the fixed core side opposite to the end opposite to the yoke side with respect to the back surface of the surface in contact with the yoke in the permanent magnet. By defining the length, the movable core slid to a position separated from the fixed core can be reliably latched by the magnetic force of the permanent magnet.

Further, the actuator solenoid valve according to claim 3 Symbol placement, and according to the solenoid valve with an actuator for the solenoid valve, the surface and either side of the back surface in contact with the yoke and the other surface at the S pole N Since the permanent magnet is constituted by the ring magnet magnetized to be a pole, the magnetic force of the permanent magnet is almost equally applied to each part of the movable core, so that the movable core can be suitably latched.

According to the actuator for an electromagnetic valve according to claim 4 and the electromagnetic valve including the actuator for an electromagnetic valve, the urging member for urging the movable core in a direction to separate the movable core from the fixed core is provided. Since the valve attached to the movable core can be reliably pressed against the valve port, the solenoid valve can be reliably maintained in the closed state.

FIG. 2 is an external perspective view of the solenoid valve 1. FIG. 3 is an external perspective view of an actuator 3. FIG. 2 is a sectional view of the solenoid valve 1. FIG. 3 is a partial cross-sectional view of the solenoid valve 1 in a closed state. FIG. 3 is a partial cross-sectional view of the solenoid valve 1 in an open state. FIG. 3 is an external perspective view of the actuator 3 with a magnet 28 removed. It is sectional drawing of actuator 3A.

  Hereinafter, embodiments of a solenoid valve actuator and a solenoid valve according to the present invention will be described with reference to the accompanying drawings.

  The solenoid valve 1 shown in FIG. 1 is an example of a “pilot-type solenoid valve” which is an example of an “electromagnetic valve”, and an actuator 3 shown in FIG. It is configured such that passage of tap water) can be regulated / permitted. As shown in FIG. 3, the valve body 2 includes a first block 11, a second block 12, a main valve 13, and a pilot valve 14.

  The first block 11 is a member that forms an upstream space Si into which a liquid to be restricted / allowed to flow flows and a downstream space So into which a liquid allowed to pass flows. A pipe connected to the supply source (hereinafter, also referred to as “supply source side pipe”: not shown) is connected to an inlet port Hi (a pipe connection port communicating with the upstream space Si), and a liquid supply destination is provided. (Hereinafter, also referred to as “supply-side pipe”: not shown) connected to a discharge port Ho (a pipe connection port communicating with the downstream space So). I have. The second block 12 is a member that forms a pressure chamber Sp for controlling the opening and closing of the main valve 13 in cooperation with the first block 11 and the main valve 13. 11, and the actuator 3 with the pilot valve 14 attached thereto can be attached.

  The main valve 13 is a “valve body (diaphragm)” that restricts / allows the passage of the liquid flowing into the upstream space Si in the first block 11, and includes a main body 13a, a valve membrane 13b, and a spring 13c. . In this case, in the solenoid valve 1 of the present embodiment, the small hole 13h (the orifice serving as the starting point of the pilot line) for allowing the liquid to flow from the upstream space Si into the pressure chamber Sp is provided in the valve membrane portion 13b integrated with the main body portion 13a. ) Is formed. Further, in the solenoid valve 1 of the present embodiment, the spring 13c is attached so as to urge the main body 13a and the valve membrane 13b toward the valve port 11h (the inlet of the downstream space So) of the first block 11, and One end of the spring 13c is inserted into the small hole 13h of the valve membrane 13b to clean the inside of the small hole 13h when the main body 13a and the valve membrane 13b are opened and closed. The pilot valve 14 is an example of a “valve element”, and is attached to the actuator 3 and opens / closes a small hole 12 h of the second block 12.

  The actuator 3 is an example of an “electromagnetic valve actuator”, and as shown in FIGS. 3 to 5, a bobbin 21, an exciting coil 22, a mold case 23, a fixed core 24, a movable core 25, a spring 26, a yoke 27, It is provided with a magnet 28. The bobbin 21 is a “winding frame” for forming the excitation coil 22, and includes a tube portion 21 a, which is an example of a “tube portion”, and flange portions 21 b, 21 b formed integrally. The excitation coil 22 is configured by winding a conductive wire around a cylindrical portion 21 a of the bobbin 21. In this case, both ends of the above-mentioned conductor constituting the excitation coil 22 are connected to a signal line 22a (see FIGS. 1 to 3), and are connected to a control device (not shown) via the signal line 22a. The mold case 23 seals the excitation coil 22 together with the bobbin 21 by insert molding in which the bobbin 21 in a state where the excitation coil 22 (conductive wire) is wound is inserted (ensures insulation and excites the excitation). This prevents the coil 22 from getting wet or damaged).

  The fixed core (fixed iron core: plug nut) 24 is formed in a substantially cylindrical shape and inserted into one end side (upper end side in FIGS. 3 to 5) of the cylindrical portion 21 a of the bobbin 21. The yoke 27 is integrated with the bobbin 21 so that the slide with respect to the bobbin 21 is regulated. The movable core (movable iron: plunger) 25 is formed in a substantially columnar shape having substantially the same diameter as the fixed core 24, and is slidable with respect to the bobbin 21 so as to be slidable with respect to the other end of the cylindrical portion 21a (the lower end in FIGS. Part). In this case, in the solenoid valve 1 (actuator 3) of the present example, the pilot valve 14 as a “valve element” is provided at the end (the lower end in FIGS. 3 to 5) of the movable core 25 opposite to the fixed core 24 side. The structure which can be attached is adopted. The spring 26 is an example of an “biasing member”, and is disposed between the fixed core 24 and the movable core 25 and biases the movable core 25 away from the fixed core 24.

  The yoke 27 forms a magnetic path around the mold case 23 (a magnetic path extending from one end of the cylinder 21a to the other end) connecting the fixed core 24 and the movable core 25 inserted into the cylinder 21a. The bobbin is formed by fixing a U-shaped member and a flat plate-shaped member to each other by crimping so as to sandwich the bobbin 21 and the exciting coil 22 molded by the mold case 23. 21, the excitation coil 22, the mold case 23, and the fixed core 24. In this case, in the yoke 27 of the present example, an insertion hole 27a through which a portion of the bobbin 21 on the other end side (the side where the movable core 25 is inserted) of the cylindrical portion 21a is inserted has one end surface (in this example, a flat plate-like shape). And a through hole 27b through which the positioning protrusion of the fixed core 24 inserted into the one end of the cylindrical portion 21a can be inserted is provided at another end surface (in this example, a U-shaped front view). Member).

  The magnet 28 is a “ring magnet”, which is an example of a “permanent magnet” for latching the movable core 25 (restricting the sliding of the movable core 25), and a cylindrical portion protruding from the insertion hole 27 a of the yoke 27. It is detachably attached around the insertion hole 27a on the outer surface (the lower surface in each figure) of the yoke 27 so as to surround the 21a. In this case, in the solenoid valve 1 (actuator 3) of the present embodiment, a ring magnet (a magnet magnetized such that one of the surface in contact with the yoke 27 and the back surface thereof has an S pole and the other surface has an N pole). The magnet 28 is composed of a magnet magnetized in the thickness direction), and as an example, a configuration is adopted in which the magnet 28 is attached to the yoke 27 so that the surface serving as the S pole is brought into contact.

  In addition, in the solenoid valve 1 (actuator 3) of the present embodiment, as shown in FIGS. 3 and 4, when the magnet 28 is attached to the yoke 27, it is movable to a position separated from the fixed core 24 by excitation by the excitation coil 22. When the core 25 is slid in the cylindrical portion 21a, the end (lower end) of the movable core 25 opposite to the fixed core 24 side is the back surface of the magnet 28 in contact with the yoke 27 (both sides). The end (upper end) of the movable core 25 on the fixed core 24 side and the fixed core 24 are located on the opposite side to the yoke 27 side (lower than the lower surface of the magnet 28) with respect to the yoke 27 side. The length between the side and the opposite end (lower end) is defined.

  In the actuator 3 of the present example, a convex portion for attaching the pilot valve 14 is formed at the lower end of the movable core 25, but the “movable” to be positioned “below the lower surface of the magnet 28” described above. The end (lower end) of the core 25 on the opposite side to the fixed core 24 side does not mean the protruding end (lower end) of the convex portion for mounting the pilot valve 14, but is one of the “magnetic path”. It means an end (lower end) in the “body portion of the movable core” for forming the portion, that is, an end (lower end) in a portion having the same diameter as the inner diameter of the cylindrical portion 21a.

  The actuator 3 is provided with a magnet 28 attached to the yoke 27 as shown in FIG. 2 or a magnet 28 removed from the yoke 27 as shown in FIG. Each component other than the magnet 28 can be used as either a "latch type actuator" or a "non-latching type actuator" without any change. Therefore, when manufacturing the solenoid valve 1 as a “latch-type solenoid valve”, as shown in FIG. 2, the magnet 28 is attached to the yoke 27 so as to surround the movable core 25 in the cylindrical portion 21a, The pilot valve 14 is attached to the tip (lower end) of the pilot valve 25. At this time, the magnet 28 is attracted to the yoke 27 by its own magnetic force.

  Subsequently, the valve body 2 is assembled. Specifically, first, the first block 11 is integrated with the main body 13a, and one end of the spring 13c sandwiches the outer peripheral portion of the valve leaflet 13b inserted through the small hole 13h. 12 is fitted. Next, the actuator 3 is fixed to the valve body 2 (the second block 12) by screwing a fixing screw (see FIGS. 4 and 5) through which the flat member of the yoke 27 penetrates into the first block 11. Thereby, as shown in FIGS. 1 and 3, the latch type solenoid valve 1 is completed.

  When using the solenoid valve 1, first, the supply source side pipe is connected to the inlet port Hi of the valve body 2, and the supply destination side pipe is connected to the discharge port Ho. In this case, in this electromagnetic valve 1, the main body 13a and the valve membrane 13b are pressed toward the valve port 11h (the entrance of the downstream space So) in the first block 11 by the spring 13c, and the valve port 11h is pressed by the valve membrane 13b. It is in a closed state. Therefore, the liquid that has flowed into the upstream space Si from the inlet Hi through the supply-side pipe is in a state where passage of the liquid from the upstream space Si to the downstream space So is regulated by the main valve 13.

  Note that, in practice, when the pilot valve 14 is opened and closed a plurality of times to serve as an operation test after the connection of the two pipes, the liquid flowing from the upstream space Si through the small holes 13h of the valve membrane portion 13b. As a result, the air in the pressure chamber Sp is discharged from the small holes 12h of the second block 12 to the downstream space So of the first block 11, and the pressure chamber Sp is filled with liquid. In order to facilitate understanding, a detailed description of the air bleeding operation in the pressure chamber Sp at the time of connecting the piping (at the start of using the electromagnetic valve 1) will be omitted.

  In this case, in the equipment provided with the solenoid valve 1, a current is supplied from a control device (not shown) to the excitation coil 22 of the actuator 3, and as shown in FIG. 4, the excitation coil 22 separates from the fixed core 24 by excitation by the excitation coil 22. When the movable core 25 is slid to the position, the pilot valve 14 attached to the movable core 25 closes the small hole 12h of the valve body 2 (the second block 12). In this state, the sliding of the movable core 25 in the cylindrical portion 21a is restricted (the movable core 25 is latched) by the urging force of the spring 26 and the magnetic force of the magnet 28 attached to the yoke 27. Therefore, even when the supply of current from the control device is stopped, the state where the small hole 12h is closed by the pilot valve 14 is maintained.

  For this reason, as shown in FIG. 3, the liquid flowing into the upstream space Si from the inlet Hi flows into the pressure chamber Sp from the small hole 13h of the main valve 13 as shown by the arrow Lp1, thereby forming the upstream space Si. The hydraulic pressure in the Si and the hydraulic pressure in the pressure chamber Sp become substantially equal. Therefore, the state in which the valve membrane 13b is pressed against the valve port 11h by the urging force of the spring 13c in the main valve 13 and the valve port 11h is closed is maintained. Thus, in a state where the movable core 25 is latched as described above and the small hole 12h is closed by the pilot valve 14, the passage of the liquid supplied to the valve body 2 (the inlet Hi of the first block 11). Is maintained in a regulated state.

  On the other hand, when supplying the liquid to the supply destination, a current having a polarity opposite to that when the movable core 25 is separated from the fixed core 24 as described above is supplied to the exciting coil 22. At this time, as shown in FIG. 5, the movable core 25 is slid to a position in contact with the fixed core 24 by excitation by the excitation coil 22 so that the pilot valve 14 attached to the movable core 25 is The small hole 12h is opened away from the small hole 12h of the (second block 12). In this state, the sliding of the movable core 25 in the cylindrical portion 21a is restricted by the magnetic force of the magnet 28 (the state in which the movable core 25 is latched). Therefore, even if the supply of the current from the control device is stopped. The state in which the small holes 12h are opened is maintained.

  When the small hole 12h is opened, the liquid in the pressure chamber Sp flows out of the small hole 12h into the downstream space So as shown by an arrow Lp2 in FIG. It becomes lower than the liquid pressure in the side space Si. For this reason, the main valve 13 (the main body 13a and the valve membrane 13b) is pushed up to the pressure chamber Sp side against the urging force of the spring 13c by the liquid pressure in the upstream space Si, and as a result, the valve membrane 13b is moved to the valve port 11h. And the valve port 11h is opened. As a result, the liquid in the upstream space Si flows between the first block 11 (the edge of the valve port 11h) and the main valve 13 (valve film portion 13b) as shown by an arrow Lm1 in FIG. After passing through the opening 11h, it flows out into the downstream space So as indicated by the arrow Lm2. Thus, the liquid in the downstream space So is supplied from the outlet Ho to the supply destination via the supply destination pipe.

  When the small holes 12h of the valve body 2 (the second block 12) are open, the liquid flows from the upstream space Si into the downstream space So in parallel with the flow of the liquid into the downstream space So as indicated by arrows Lm1 and Lm2. The liquid in the upstream space Si flows into the pressure chamber Sp from the small hole 13h of the main valve 13 as shown by the arrow Lp1, and the liquid in the pressure chamber Sp flows downstream from the small hole 12h as shown by the arrow Lp2. It flows out into the space So. Therefore, in the state where the movable core 25 is latched and the small hole 12h is opened as described above, the state where the hydraulic pressure in the pressure chamber Sp is lower than the hydraulic pressure in the upstream space Si is maintained. As a result, the state in which the liquid supplied to the valve body 2 (the inlet Hi of the first block 11) is allowed to pass is maintained.

  Further, in order to stop the supply of the liquid to the supply destination, the movable core 25 is slid to a position away from the fixed core 24 by supplying a current to the excitation coil 22 of the actuator 3 from the control device, and the pilot valve 14 The small hole 12h of the main body 2 (the second block 12) is closed. At this time, as described above, the hydraulic pressure in the upstream space Si and the hydraulic pressure in the pressure chamber Sp become substantially equal, and the valve membrane portion 13b is pressed against the valve port 11h by the urging force of the spring 13c. The mouth 11h is closed. Thereby, the passage of the liquid supplied to the valve main body 2 (the inlet Hi of the first block 11) is restricted.

  On the other hand, when manufacturing the solenoid valve 1 as a “non-latching solenoid valve”, as shown in FIG. 6, the magnet 28 is removed from the yoke 27 (the magnet 28 is not mounted), and the tip of the movable core 25 is Attach the pilot valve 14 (at the lower end). In this case, the actuator 3 without the magnet 28 is used (hereinafter, the actuator 3 without the magnet 28 is also referred to as “actuator 3x” to distinguish it from the actuator 3 with the magnet 28 attached). When manufacturing a non-latch type solenoid valve, a "valve body" different from the valve body 2 for the latch type solenoid valve 1 can be prepared and manufactured. By adopting the method, the actuator 3x is attached to the valve body 2 for the latch type solenoid valve 1, and the non-latch type solenoid valve 1 The valve 1 is also referred to as an “electromagnetic valve 1x”.

  Specifically, after assembling the valve body 2 in the same procedure as when manufacturing the solenoid valve 1, instead of the magnet 28, the spacer 29 (for example, as an example) is attached to the cylindrical portion 21 a protruding from the insertion hole 27 a of the yoke 27. An actuator 3x to which a washer made of a non-magnetic material having the same size and the same shape as the magnet 28, for example, a resin washer such as polyacetal resin) is attached to the valve body 2. Thereby, the solenoid valve 1x is completed. The operation of the “non-latch type electromagnetic valve” is known, and therefore detailed description is omitted.

  As described above, in the actuator 3, the magnet 28 for latching the movable core 25 in the cylindrical portion 21a is detachably attached around the insertion hole 27a on the outer surface of the yoke 27. The solenoid valve 1 includes the actuator 3 described above and the pilot valve 14 attached to the movable core 25. Therefore, according to the actuator 3 and the solenoid valve 1, unlike the “electromagnetic valve actuator” in which the “permanent magnet” for the latch is arranged inside the “yoke”, each component except the magnet 28 is used. The actuator 3 can be used as a "latch-type solenoid valve actuator" by sharing the magnet 28 with the yoke 27, and the actuator 3 can be used by not attaching the magnet 28 to the yoke 27. Can be used as a “non-latching solenoid valve actuator”. Therefore, with the actuator 3 and the solenoid valve 1, it is not necessary to newly perform a design work when manufacturing the non-latch type actuator 1 x, and the bobbin 21 and the yoke 27 of the latch type actuator 1 are different from the shape and size. Can use the common bobbin 21 and yoke 27, and as a result, the manufacturing cost of the latch-type solenoid valve 1 and the non-latch-type solenoid valve 1x can be sufficiently reduced.

  Further, according to the actuator 3 and the solenoid valve 1, when the slider is slid to a position away from the fixed core 24, the end of the magnet 28 on the side opposite to the fixed core 24 side is in contact with the yoke 27. By defining the length between the end of the movable core 25 on the fixed core 24 side and the end of the movable core 25 on the opposite side to the fixed core 24 so as to be located on the opposite side to the yoke 27 side from the back surface. The movable core 25 slid to a position separated from the fixed core 24 can be reliably latched by the magnetic force of the magnet 28.

  Further, according to the actuator 3 and the electromagnetic valve 1, a “ring magnet” magnetized so that one of the surface in contact with the yoke 27 and the back surface thereof is an S pole and the other surface is an N pole. With the configuration of the magnet 28 as a “permanent magnet”, the magnetic force of the magnet 28 is almost equally applied to each part of the movable core 25, so that the movable core 25 can be suitably latched.

  Further, according to the actuator 3 and the solenoid valve 1, the provision of the spring 26 for urging the movable core 25 away from the fixed core 24 allows the pilot valve 14 attached to the movable core 25 to be moved. Since the state can be reliably pressed against the small hole 12h of the main body 2, the solenoid valve 1 can be reliably maintained in the closed state.

  Note that the configurations of the “electromagnetic valve actuator” and the “electromagnetic valve” are not limited to the examples of the configurations of the actuator 3 and the electromagnetic valve 1 described above. For example, although the example of the actuator 3 in which the magnet 28 formed of a “ring magnet” is attached as a “permanent magnet” has been described, the shape of the “permanent magnet” is not limited to this, and as an example, the actuator 3A shown in FIG. As in (another example of “electromagnetic valve actuator”), a plurality of square (flat) magnets 28A (for example, two magnets 28A) can be detached near the insertion hole 27a in the yoke 27. The "actuator for solenoid valve" can be configured by attaching.

  The configuration of the solenoid valve 1 (1x), which is an example of the “pilot-type solenoid valve”, has been described as an example. However, the configuration of the “solenoid valve” is not limited to this, and the “direct-acting solenoid valve” ( (Not shown), the actuator 3 (3x) or the actuator 3A can be assembled as an “electromagnetic valve actuator”.

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Valve main body 3, 3A actuator 11 1st block 11h Valve port 12 2nd block 12h, 13h Small hole 13 Main valve 13a Main part 13b Valve film part 13c Spring 14 Pilot valve 21 Bobbin 21a Tube part 21b Flange part 22 Excitation Coil 22a Signal line 23 Mold case 24 Fixed core 25 Movable core 26 Spring 27 Yoke 27a, 27b Insertion hole 28, 28A Magnet 29 Spacer Hi Inlet Ho Outlet Si Upstream space So Downstream space Sp Pressure chamber

Claims (5)

A bobbin in which an exciting coil is formed by winding a conductive wire around a cylindrical portion; a fixed core that is inserted into one end of the cylindrical portion to regulate the sliding with respect to the bobbin; A movable core inserted into the other end of the tubular portion, and an insertion hole through which the other end of the tubular portion can be inserted is provided so that the tubular portion is inserted into the insertion hole. An actuator for a solenoid valve, comprising: a yoke integrated with the bobbin to form a magnetic path; and a valve body attached to an end of the movable core opposite to the fixed core. ,
When the supply of current to the exciting coil is stopped in a state where the movable core is slid to a position away from the fixed core, and in a state where the movable core is slid to a position in contact with the fixed core. A permanent magnet for restricting sliding of the movable core in the cylindrical portion when supply of current to the exciting coil is stopped is detachably mounted around the insertion hole on the outer surface of the yoke. Actuator.   The movable core is opposite to the fixed core when the movable core is slid in the cylindrical portion to a position separated from the fixed core by excitation by the excitation coil in a state where the permanent magnet is attached to the yoke. The end of the fixed core side and the opposite side of the fixed core side so that the end of the permanent magnet is located on the opposite side to the yoke side from the back surface of the surface in contact with the yoke in the permanent magnet. The actuator for a solenoid valve according to claim 1, wherein a length between the ends is defined.   The permanent magnet is formed of a ring magnet that is magnetized such that one surface of the surface contacting the yoke and the back surface thereof when attached to the yoke has an S pole and the other surface has an N pole. The actuator for a solenoid valve according to claim 1 or 2, wherein: The actuator for a solenoid valve according to any one of claims 1 to 3 , further comprising: a biasing member that biases the movable core in a direction to separate the movable core from the fixed core. An electromagnetic valve, comprising: the actuator for an electromagnetic valve according to any one of claims 1 to 4 ; and a valve body attached to the movable core.

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