JP7244259B2 - solenoid valve - Google Patents

Description

The present invention relates to an electromagnetic valve that electromagnetically switches a flow path.

2. Description of the Related Art A solenoid valve including a valve portion that constitutes a three-way valve and a solenoid for driving the valve portion is known (for example, Patent Document 1). The valve portion of the solenoid valve of Patent Document 1 includes three ports, an input port, an output port, and a supply port, a valve chamber that communicates the three ports, and a valve body housed in the valve chamber. When a current is passed through the solenoid, the magnetic force generated by the solenoid drives the valve body, changes the connection state of the port, and switches the flow path.

The valve portion is provided with a pair of mounting holes on both sides of the valve chamber, and the electromagnetic valve is mounted on the mounting target using screws inserted into the mounting holes.

Japanese Patent No. 4026112

In the solenoid valve of Patent Document 1, the valve chamber is arranged between a pair of mounting holes. Therefore, the valve chamber cannot be expanded due to the obstruction by the mounting hole, and it is difficult to enlarge the flow path connecting the ports.

A problem to be solved by the present invention is to enable expansion of a valve chamber in a solenoid valve without being obstructed by a mounting hole.

A solenoid valve (1) according to one embodiment of the present invention has a generally rectangular parallelepiped shape, and includes a valve chamber (13) having a circular cross section extending horizontally inside and a bottom surface extending downward from the valve chamber (13). a valve housing (7) having a plurality of ports (5) opening at and slidably disposed within said valve chamber for cooperation with valve seats (12, 20) provided in said valve chamber; and a valve body (6) provided on one side in the axial direction of the valve chamber of the valve housing, the valve body being positioned at a first position and on the other side in the axial direction of the first position. a solenoid device (1B) for displacing between a second position and a solenoid device (1B) for moving both sides of the axial line of the valve chamber up and down on the other side of the axial direction relative to the second position; A pair of attachment holes (8) for fastening are provided therethrough.

According to this configuration, the mounting hole is arranged outside the movable range of the valve body in the axial direction of the valve chamber. As a result, the diameter of the valve chamber can be expanded in the portion corresponding to the movable range of the valve body without being obstructed by the mounting hole.

In the above solenoid valve, preferably, a retainer recess (26) having a reduced diameter and a circular cross-section recessed toward the other side in the axial direction is provided at the end of the valve chamber, and the valve body is inserted into the retainer recess. A compression coil spring (27) is received for biasing toward the side of the solenoid device, and the mounting holes extend vertically through both sides of the retainer recess.

According to this configuration, since the retainer recess is formed by reducing the diameter so as to pass between the mounting holes, it is not necessary to increase the size of the solenoid valve on both sides of the axis in order to provide the recess.

In the electromagnetic valve, the valve body (14) preferably has a valve body (14) that can move toward and away from an annular valve seat formed coaxially with the valve chamber in the axial direction.

According to this configuration, the valve body functions as a so-called poppet valve, which is a valve that moves in a direction orthogonal to a plane including the annular valve seat. Since the port is switched by moving the valve body toward and away from the valve seat, the structure of the valve body and the valve chamber is simplified.

In the solenoid valve, preferably, a circuit board (60) is mounted on the upper part of the solenoid device and extends horizontally toward the valve housing, and a circuit board (60) is positioned between the valve housing and the circuit board. and a connector (65) attached to the bottom surface of the circuit board.

According to this configuration, the connector is provided at a position overlapping the valve housing when viewed from the top, so the size of the solenoid valve when viewed from the top can be reduced. Furthermore, by providing the connector on the lower surface of the circuit board, the size of the solenoid valve in the vertical direction can be made smaller than when the connector is provided on the upper surface of the circuit board.

In the electromagnetic valve, preferably, an electronic component (61) is arranged on the lower surface of the circuit board so as to be positioned between the upper surface of the solenoid device and the lower surface of the circuit board.

According to this configuration, the electronic components are not exposed and can be protected by the circuit board, as compared with the case where the electronic components are arranged on the upper surface of the circuit board.

In the solenoid valve, preferably, the circuit board is attached to an extension (50) extending upward from the coil bobbin (42) in the solenoid device, and is connected to a coil wire (53) wound around the coil bobbin. and the circuit board is electrically connected to the coil wire and attached to the coil bobbin through pins (52) fixed to the coil bobbin.

According to this configuration, by connecting the circuit board to the pins, the circuit board can be electrically connected to the coil wire and attached to the solenoid device.

In the above solenoid valve, preferably, the connector is configured such that a plug (66) fitted to the connector is inserted and removed parallel to the axial direction.

According to this configuration, the plug can be inserted/extracted even when there is an obstacle on the upper front side of the connector.

In the electromagnetic valve, preferably, a plug arrangement space (95) in which the plug fitted to the connector is arranged is defined by the other end surface of the connector in the axial direction and the upper surface of the valve housing. , the mounting hole is provided below the plug arrangement space.

According to this configuration, the mounting hole is arranged substantially below the connector of the cable to be connected to the connector. This prevents the user from accidentally loosening the fastener.

According to the solenoid valve of the present invention, the valve chamber can be expanded without being obstructed by the mounting hole.

1 is a perspective view of a solenoid valve according to the invention; Longitudinal cross-sectional view of solenoid valve and manifold block fastened to manifold block Cross section of solenoid valve (A) Enlarged view of the IVA portion of FIG. 2 when the valve disc is in the rear position, and (B) Enlarged view of the IVB portion of FIG. 2 when the valve disc is in the forward position.

An embodiment of an electromagnetic valve according to the present invention will be described below with reference to FIGS. 1 to 4. FIG. In the following description, the up-down, front-rear, and left-right directions are defined for convenience according to the arrows shown in FIG.

The solenoid valve 1 is used to electromagnetically switch the connection state of a plurality of ports that respectively define flow paths, and is a so-called three-way valve that switches the connection state of three ports in this embodiment. For example, the solenoid valve 1 has a state in which the output port A is connected to a supply port P to which fluid such as compressed air is supplied, and a state in which the output port A is connected to an exhaust port R which is open to the atmosphere in order to release the pressure in the output port A is used to switch between connected and connected states.

As shown in FIG. 1, a solenoid valve 1 is attached to a manifold block 2 made of metal. The manifold block 2 is provided with a plurality of block through-holes 3 penetrating inside. Each block through-hole 3 defines a flow path inside the manifold block 2 . A horizontal mounting surface 4 is provided on the upper surface of the manifold block 2 .

As shown in FIG. 2, the solenoid valve 1 includes a valve portion 1A that constitutes a three-way valve, and a solenoid device 1B that is coupled to the front side surface of the valve portion 1A and switches the connection state of the port 5 inside the valve portion 1A. I'm in.

The valve portion 1</b>A includes a rectangular parallelepiped valve housing 7 that defines a plurality of ports 5 and houses a valve body 6 . The valve housing 7 is made of metal, and is preferably formed by cutting out aluminum, for example. A pair of mounting holes 8 for fastening are provided in the valve housing 7 vertically and a pair of screw holes 4A are provided in the mounting surface 4 at positions aligned with the mounting holes 8 . The valve housing 7 is arranged on the upper side of the mounting surface 4, and the valve housing 7 is fastened to the mounting surface 4 by inserting the screw 9 into the mounting hole 8 and tightening it into the screw hole 4A. The solenoid valve 1 is thereby fixed to the manifold block 2 .

As shown in FIG. 2, the valve housing 7 has a bottomed cylindrical shape with a valve housing recess 10 that is a recess. The valve housing recess 10 is a horizontally extending recess having a circular cross section centered on the axis X. The valve housing recess 10 is opened at the front surface of the valve housing 7 and is recessed rearward.

The ports 5 (see FIG. 3) are each holes extending downwardly from the valve housing recess 10 and opening at the bottom. The valve housing 7 is provided with three ports 5 , and the three ports 5 are formed side by side in the valve housing 7 . Hereinafter, as shown in FIG. 2, the most forward port 5 is referred to as a front port 5F, the central port 5 is referred to as a middle port 5M, and the most rearward port 5 is referred to as a rear port 5R.

A large-diameter portion 10A having the same diameter is provided at the front portion of the valve housing concave portion 10, and a small-diameter portion 10B having an inner diameter smaller than that of the large-diameter portion 10A is provided at the rear portion. An annular stepped portion 10C facing forward is formed between the large diameter portion 10A and the small diameter portion 10B. The stepped portion 10C is positioned between the front port 5F and the middle port 5M in the front-rear direction. A rear valve seat 12 which forms an annular shape centering on the axis X and protrudes forward is provided on the inner peripheral edge of the stepped portion 10C.

The valve body 6 is slidably arranged along the axis X inside the valve housing recess 10 . That is, a valve chamber 13 that accommodates the valve body 6 is formed in the valve housing concave portion 10 . The valve body 6 includes an annular valve body 14 coaxial with the axis X and a valve support 15 extending rearward along the axis X from the rear surface of the valve body 14 . The valve body 14 is arranged in front of the step portion 10C. The valve main body 14 includes an annular first annular member 14A centered on the axis X, an annular elastic member 14B provided along the outer periphery of the first annular member 14A and centered on the axis X, and an elastic member 14B. and a second annular member 14C having an annular shape centered on the axis X and provided along the outer periphery of the .

A cylindrical member 16 coaxial with the axis X is housed in the front side of the valve body 14 of the valve housing recess 10 . An annular rubber sealing member 17 is provided between the outer circumference of the cylindrical member 16 and the inner peripheral wall surface of the valve housing recess 10 . A flange 18 extending radially outward is provided on the front edge of the cylindrical member 16 over the entire circumference. An annular front valve seat 20 is provided at the rear end edge of the tubular member 16, forming an annular shape centered on the axis X and protruding rearward. The front valve seat 20 is located on the front side of the elastic member 14B over the entire circumference. By providing the front valve seat 20 , the valve body 6 is prevented from falling forward, and the portion behind the front valve seat 20 of the valve housing concave portion 10 becomes the valve chamber 13 . In this embodiment, the front edge of the valve housing 7 is provided with a housing extension portion 21 that extends upward along the flange 18 .

The valve support 15 has a cylindrical shape (pincushion shape) coaxial with the axis X. As shown in FIG. A valve support recess 24 that is recessed radially inward is provided on the outer peripheral surface of the valve support 15 at approximately the center in the front-rear direction. The rear portion of the valve support 15 is in contact with the inner peripheral wall surface of the valve housing concave portion 10 via a seal member 25 between the middle port 5M and the rear port 5R. This prevents the middle port 5M and the rear port 5R from being connected to each other regardless of the position of the valve body 6 in the front-rear direction.

As shown in FIG. 2, the rear end portion of the valve housing recess portion 10, that is, the rear end portion of the valve chamber 13, is provided with a retainer recess portion 26 recessed rearward. Retainer recess 26 extends rearwardly along axis X with a circular cross section. The inner diameter of the retainer recess 26 is equal in the front-rear direction, and the inner diameter is smaller than the inner diameter of the small-diameter portion 10B. That is, the retainer concave portion 26 is recessed rearward with a smaller diameter than the small diameter portion 10B. A rear compression coil spring (hereinafter referred to as a rear spring 27 ) extending along the axis X is received and held in the retainer recess 26 . The front end of the rear spring 27 abuts against the rear end surface of the valve support 15 and biases the valve body 6 forward.

As shown in FIG. 2, the mounting holes 8 penetrate the valve housing 7 vertically. As shown in FIG. 3, the mounting holes 8 are provided symmetrically about the axis X on both left and right sides of the retainer recess 26 . As shown in FIG. 2 (more specifically, FIG. 4A), the mounting hole 8 at least partially overlaps the rear port 5R in a side view.

A rod-shaped drive member 30 extending back and forth along the axis X is arranged in front of the valve body 6 . A drive member recess 30A recessed forward along the axis X is formed in the rear end surface of the drive member 30 . The drive member recess 30A extends linearly in a direction perpendicular to the axis X and reaches the outer peripheral surface of the drive member 30, and both ends of the drive member recess 30A are open on the outer peripheral surface of the drive member 30, respectively.

A front compression coil spring (hereinafter referred to as a front spring 32 ) is provided between the tubular member 16 and the drive member 30 to bias the drive member 30 rearward with respect to the tubular member 16 . More specifically, an annular front spring seat 34 extending radially inward is provided at the front end of the cylindrical member 16 , and a rear spring seat 35 extending radially outward is provided at the rear end of the drive member 30 . is provided. The front spring 32 contacts the rear surface of the front spring seat 34 at its front end, and contacts the front surface of the rear spring seat 35 at its rear end. The outer diameter of the driving member 30 is larger than the inner diameter of the valve body 14 , and when no external force is applied to the driving member 30 , the front spring 32 brings the driving member 30 into contact with the front end surface of the valve body 14 . backwards. The rearward biasing force from the front spring 32 is set to be greater than the forward biasing force from the rear spring 27 .

The solenoid device 1B includes a tubular resin bobbin 42 (coil bobbin), a solenoid 43 provided on the outer periphery of the bobbin 42, an iron yoke 44 forming a part of the magnetic circuit, and an inner hole of the bobbin 42. and a plunger 46 (movable core) that is spaced behind the fixed core 45 inside the bobbin 42 . The bobbin 42 has a rectangular tubular shape with the axis X as the center. The fixed iron core 45 has a prismatic shape that is substantially the same as the inner hole of the bobbin 42 . The stationary core 45 is inserted into the bore of the bobbin 42 and fixed to the front portion of the bore.

The front and rear edges of the bobbin 42 are provided with square ring-shaped flanges 42A extending radially outward. As shown in FIG. 3, the solenoid 43 is formed by winding a wire 53 (coil wire, winding wire) that is a conductive wire coated along the outer peripheral surface of the bobbin 42 . As shown in FIG. 2, the yoke 44 has a plate-like front wall 44A along the front surface of the bobbin 42, a plate-like rear wall 44B along the rear surface of the bobbin 42, and a lateral wall connecting the lower end of the front wall and the lower end of the rear wall. 44C and has a U-shape opening upward. A yoke recess 44D recessed downward is formed in the yoke 44 by a front wall 44A, a rear wall 44B, and a lateral wall 44C, and the bobbin 42 is received and fixed in the yoke recess 44D. Between the rear wall 44B of the yoke 44 and the rear collar portion 42A of the bobbin 42, and between the front wall 44A of the yoke 44 and the front collar portion 42A of the bobbin 42, square annular rings centered on the axis X are formed. A rubber sealing member 47 is provided.

The plunger 46 has a substantially prismatic shape and is received in the inner hole of the bobbin 42 so as to be slidable in the longitudinal direction along the axis X. As shown in FIG. A rear wall 44B of the yoke 44 is provided with a through hole 44E extending along the axis X. As shown in FIG. The drive member 30 extends forward through the through hole 44E and is fastened to the plunger 46 at its front end. Between the flange 18 and the rear wall 44B of the yoke 44, a square annular rubber seal member 48 centering on the axis X is provided.

As shown in FIG. 2, extension portions 50 extending upward are provided at the upper ends of the front and rear collar portions 42A. Pins 52 are inserted from above and fixed to the upper ends of the extensions 50 . As a result, the pin 52 is positioned above the solenoid device 1B and protrudes upward from the extension 50. As shown in FIG. The pin 52 is a square bar made of metal, and both ends of the wire 53 forming the solenoid 43 are connected to different pins 52 .

A circuit board 60 is attached to the upper portion of the solenoid device 1B. The circuit board 60 is a so-called printed board in which copper wiring is applied to the surface of a plate material made of epoxy resin, and electronic components 61 are mounted on the surface. Electronic component 61 may be a resistor, capacitor, diode, or the like.

The circuit board 60 is arranged so that its surface faces downward, and is fixed to the upper ends of the solenoid device 1B, that is, the upper ends of the two pins 52, respectively. More specifically, the circuit board 60 is provided with through-holes 62 which penetrate in the thickness direction and whose inner holes are plated with copper at positions aligned with the respective pins 52 . Pins 52 are inserted into through holes 62 and soldered to circuit board 60 . Thereby, the wiring provided on the surface of the circuit board 60 and the wire 53 are electrically connected. Further, the circuit board 60 is positioned with respect to the bobbin 42 by connecting the circuit board 60 to the bobbin 42 via the pins 52 .

When the circuit board 60 is coupled to the bobbin 42 , the electronic component 61 is positioned between the pins 52 in the front-rear direction and between the upper surface of the solenoid device 1B and the lower surface of the circuit board 60 . In this manner, the bobbin 42 is provided with the extension portion 50 that extends upward, and the circuit board 60 is coupled to the pins 52 provided on the extension portion 50, so that the upper surface of the solenoid device 1B and the lower surface of the circuit board 60 are connected to each other. A space 63 for accommodating the electronic component 61 is secured between the . By housing the electronic component 61 in the space 63, the electronic component 61 does not protrude upward from the circuit board 60, and the electronic component 61 can be protected against impact from above.

The circuit board 60 extends horizontally rearward from the upper side of the extension portion 50 of the solenoid device 1B and reaches above the valve housing 7 . The rear end of the circuit board 60 is positioned rearward of the front end of the valve housing 7 and forward of the rear end of the valve housing 7 . A connector 65 is provided between the upper end of the valve housing 7 and the surface of the circuit board 60 . As shown in FIG. 2, the connector 65 is a so-called surface mount type power jack mounted by soldering to the surface of the circuit board 60 (that is, the bottom surface of the circuit board 60 in FIG. 2). That is, the power cable connected to the power source is provided with a connector (hereinafter referred to as a plug 66) that fits into the connector 65 at the end thereof, and power is supplied to the solenoid device 1B by inserting the plug 66 into the connector 65. . In this embodiment, the connector 65 has a resin connector shell 65A that opens toward the rear, and an electrode 65B that is soldered to the circuit board 60 at one end and protrudes rearward through the connector shell 65A at the other end. and As a result, the connector 65 is configured so that the plug 66 of the power cable can be inserted and removed parallel to the axial direction. As shown in FIG. 2, when connected to the connector 65, the plug 66 at its rear end is sized to generally align with the rear end of the valve housing 7 in the front-rear direction. In this embodiment, the connector 65 is provided with two electrodes 65B, and the electrodes 65B are electrically connected to the corresponding pins 52 via wires provided on the surface of the circuit board 60, respectively.

As shown in FIG. 2, the solenoid valve 1 has a metal first case 71 in the shape of a square cylinder. The solenoid device 1B is inserted into the inside of the first case 71, and a plate-like cap 73 having a main surface facing in the front-rear direction is provided in the opening on the front side thereof. The cap 73 and the flange 18 of the tubular member 16 are provided with a pair of through holes 73A and 18A penetrating back and forth. The two through holes 73A are arranged symmetrically about the axis X when viewed from the front, and are formed at diagonal positions in the vertical and horizontal directions. The two through holes 18A are formed at matching positions behind the corresponding through holes 73A.

The valve housing 7 is provided with screw holes 7A behind the through holes 18A. Two screws 74 are passed through the through holes 73A and 18A from the front of the cap 73 and coupled to the screw holes 7A, whereby the solenoid device 1B and the valve housing 7 are integrated. In this embodiment, the housing extending portion 21 of the valve housing 7 is provided with an upper screw hole 7A.

As shown in FIG. 1, on the rear side of the first case 71, there is provided a second resin case 75 having a U-shaped cross section and extending forward and backward. The second case 75 has an upper wall 75A that extends forward and backward, and side walls 75B that extend downward from the left and right edges of the upper wall 75A. A portion of the circuit board 60 behind the rear end of the first case 71 is covered with a second case 75 from above.

A manifold block 2 is provided with three block through holes 3 . The block through-holes 3 are open on the mounting surface 4 at one end side. Opening portions of the block through hole 3 are provided at positions corresponding to the front port 5F, middle port 5M and rear port 5R of the solenoid valve 1, respectively. The block through-holes 3 are opened at predetermined positions on the left and right side surfaces of the manifold block 2 at the other end side, respectively, and are connected to predetermined devices such as a vacuum device and a fluid supply device. However, the other end side of the block through hole 3 may be opened at a predetermined position on the front and rear side surfaces or the bottom surface of the manifold block 2 and connected to a predetermined device. The mounting surface 4 is further provided with screw holes 4</b>A at positions corresponding to the two mounting holes 8 .

After the electromagnetic valve 1 is arranged so that the openings of the ports 5 are aligned with the openings of the mounting surface 4 of the block through hole 3, screws 9, which are fasteners, are inserted into the mounting holes 8 from above. is fixed to the manifold block 2 by tightening it into the screw hole 4A. At this time, as shown in FIG. 2, the block through holes 3 are connected to the corresponding ports 5, respectively. In order to prevent fluid from leaking between the lower surface of the valve housing 7 and the mounting surface 4, ring-shaped rubber seals are formed in the openings of the front port 5F, the middle port 5M and the rear port 5R on the bottom surface of the valve housing 7, respectively. A sealing member 86 is provided. In this embodiment, compressed air as a fluid is supplied to the block through-hole 3M connected to the middle port 5M, and the fluid is also supplied to the middle port 5M connected to the block through-hole 3M. Function. The block through hole 3R corresponding to the rear port 5R is open to the atmosphere, and the rear port 5R connected to the block through hole 3R is also open to the atmosphere and functions as an exhaust port R for releasing pressure above atmospheric pressure.

Next, operation of the solenoid valve 1 will be described. When the current flowing through the solenoid 43 is zero, the forward biasing force of the front spring 32 is greater than the forward biasing force of the rear spring 27, so that the valve body 14 is closed as shown in FIG. is a position where the elastic member 14B and the rear valve seat 12 abut, that is, a position where the valve body 14 is seated on the rear valve seat 12 (hereinafter referred to as a rear position (second position)). When the valve body 6 is in the rear position, the cooperation of the elastic member 14B and the rear valve seat 12 blocks communication between the front port 5F and the middle port 5M. Further, when the valve body 6 is at the rear position, the elastic member 14B and the front valve seat 20 are separated, and the front port 5F is connected to the inner hole of the cylindrical member 16, the drive member recess 30A, the inner hole of the valve main body 14, and the valve. It communicates with the rear port 5R through the inner holes of the support 15 in order. As a result, the front port 5F and the rear port 5R are connected and opened to the atmosphere, and the pressure in the front port 5F becomes the atmospheric pressure.

Next, when the solenoid 43 is energized, the solenoid 43 is excited and the fixed core 45 is magnetized. Due to the magnetization of the fixed core 45 , a magnetic force is applied to the plunger 46 in the direction toward the fixed core 45 , that is, forward. When the resultant force of the magnetic force and the forward urging force from the rear spring 27 exceeds the rearward urging force from the front spring 32, the plunger 46 moves forward as shown in FIG. The member 30 leaves the valve body 6 . As a result, the urging force from the front spring 32 is no longer applied to the valve body 6 , and the valve body 6 moves forward according to the forward urging force from the rear spring 27 , so that the valve body 14 moves toward the elastic member 14</b>B and the front valve seat 20 . , that is, the position where the valve body 14 is seated on the front valve seat 20 (hereinafter referred to as the front position (first position)). When the valve body 6 is in the front position, the elastic member 14B and the front valve seat 20 cooperate to close the passage connecting the front port 5F and the inner hole of the tubular member 16, thereby connecting the front port 5F and the rear port 5R. Communication is cut off. Further, when the valve body 14 is in the front position, the elastic member 14B and the rear valve seat 12 are separated, and the front port 5F and the middle port 5M communicate with each other through the valve support concave portion 24 . As a result, the front port 5F and the middle port 5M are connected, the fluid is supplied from the middle port 5M to the front port 5F, and the pressure inside the front port 5F is increased.

After that, when the current flowing through the solenoid 43 becomes zero, the magnetic field generated by the solenoid 43 becomes zero. As a result, the valve body 6 moves rearward in accordance with the rearward biasing force of the front spring 32 and displaces from the front position to the rear position. As a result, the communication between the front port 5F and the middle port 5M is cut off, and the front port 5F and the rear port 5R are connected and released to the atmosphere. As a result, the pressure inside the front port 5F drops and returns to atmospheric pressure.

In this manner, the electromagnetic valve 1 switches between a state in which the front port 5F is connected to the middle port 5M functioning as the supply port P and a state in which the front port 5F is connected to the rear port 5R functioning as the exhaust port R. and the front port 5F functions as the output port A. The block through-hole 3F located on the frontmost side is connected to the front port 5F, and is switched between a state in which the solenoid 43 is energized, and a state in which compressed air is supplied.

Also, the valve body 14 moves in the front-rear direction to move closer to and away from the front valve seat 20 and the rear valve seat 12, thereby closing and opening the ports 5. As shown in FIG. The valve body 14 has a surface including the front valve seat 20, more specifically a surface including the tip edge of the front valve seat 20, and a surface including the rear valve seat 12, more specifically a surface including the tip edge of the rear valve seat 12. It functions as a valve that moves in a direction perpendicular to the Since the connection state between the ports 5 can be switched by moving the valve body 14 in the front-rear direction in this way, the configurations of the valve body 6 and the valve chamber 13 are simple.

Next, a method for assembling the solenoid valve 1 will be described. The rear spring 27 is inserted into the valve housing 7 through the opening of the valve housing recess 10 and received in the retainer recess 26 . After that, the valve body 6 is inserted through the opening of the valve housing concave portion 10 . Next, the drive member 30 and the plunger 46 are joined while sandwiching the front spring 32 and the tubular member 16 , and then the tubular member 16 is inserted into the valve housing recess 10 . A bobbin 42, on which a solenoid 43 is formed by winding a wire 53, is accommodated in the yoke recess 44D and fixed to the yoke 44. As shown in FIG. Furthermore, after inserting and fixing the fixed core 45 into the inner hole of the bobbin 42 , the plunger 46 is inserted into the inner hole of the bobbin 42 so that the pin 52 provided on the extended portion 50 of the bobbin 42 is inserted into the through hole of the circuit board 60 . 62 and soldered. After that, the bobbin 42 and the yoke 44 are inserted into the inner hole of the first case 71 from the rear side, and the screws 74 are passed through the through holes 73A and 18A from the front of the cap 73 and fastened to the screw holes 7A of the valve housing 7 . After that, the second case 75 is arranged on the front side of the first case 71, and the lower end of the side wall 75B is locked to the valve housing 7, thereby completing the assembly of the electromagnetic valve 1. As shown in FIG.

Next, the effects of the solenoid valve 1 configured in this manner will be described. As shown in FIG. 4A, the mounting hole 8 is located behind the valve body 6 at the rear position. That is, the mounting hole 8 is positioned outside the range of motion defined between the front position and the rear position of the valve body 6 in a side view. Therefore, the diameter of the valve chamber 13 can be expanded in the direction perpendicular to the axis X in the movable range of the valve body 6 without being obstructed by the mounting hole 8 . More specifically, the inner holes of the valve body 14 and the valve support 15 can be enlarged to increase the flow path between the front port 5F and the rear port 5R. Furthermore, the valve support recess 24 can be enlarged to increase the flow path between the front port 5F and the middle port 5M. In this way, by enlarging the passage connecting each port 5, the time required to reach the atmospheric pressure in the front port 5F and the time required for the pressure in the front port 5F to reach the desired pressure after the compressed air is supplied becomes shorter. That is, the electromagnetic valve 1 can change and switch the internal pressure of the output port A (front port 5F) at a higher speed. For example, in a surface mounter for surface-mounting electronic components on a printed circuit board, the solenoid valve 1 connects the front port 5F to a port that vacuum-sucks the electronic components in order to detach the electronic components. Used to supply compressed air to detach electronic components. By using the solenoid valve 1 capable of enlarging the flow path connecting each port 5, the pressure of the vacuum suction port can be changed at high speed, and the surface mounter can operate at high speed.

As shown in FIG. 3 , mounting holes 8 are arranged on both left and right sides of the rear spring 27 . That is, since the retainer recess 26 is provided so as to pass between the mounting holes 8 , it is not necessary to increase the size of the solenoid valve 1 in the lateral direction in order to provide the retainer recess 26 . Furthermore, the length of the electromagnetic valve 1 in the front-rear direction can be reduced compared to the case where the mounting hole 8 is provided behind the rear spring 27 . Since the mounting holes 8 are arranged on both left and right sides of the axis X, the valve housing 7 and the manifold block 2 can be evenly tightened left and right using the screws 9 . Moreover, since the mounting hole 8 overlaps the rear port 5R at least in part when viewed from the side, good sealing between the valve housing 7 and the manifold block 2 is possible.

As shown in FIG. 2, the connector 65 overlaps the valve housing 7 in top view. This reduces the size of the solenoid valve 1 when viewed from above.

In order to provide a screw hole 7A for fastening the solenoid device 1B and the valve housing 7, the front end portion of the valve housing 7 is provided with a housing extension portion 21 extending upward. The housing extension 21 simultaneously lowers the rear end portion of the valve housing 7 relative to the front end portion and serves to form a space 90 in which the connector 65 is arranged above the rear portion of the valve housing 7 . By providing the housing extension 21 in this manner, it becomes possible to fasten the solenoid device 1B and the valve housing 7 and to provide the connector 65 on the lower surface of the circuit board 60 . By providing the connector 65 on the lower surface of the circuit board 60 , the vertical size of the solenoid valve 1 , that is, the height can be reduced compared to the case where the connector 65 is provided on the upper surface of the circuit board 60 .

A circuit board 60 extends rearward from the upper side of the solenoid device 1</b>B and reaches above the valve housing 7 , and a connector 65 is provided between the circuit board 60 and the valve housing 7 . Furthermore, since the connector 65 is configured so that the plug 66 of the power cable can be inserted and removed in parallel to the axial direction, that is, in the horizontal direction, there is no need to provide a space for inserting and removing the plug 66 in the vertical direction. Therefore, the plug 66 can be pulled out and inserted even when there is an obstacle on the upper front side of the connector 65 . As a result, the solenoid valve 1 can be arranged in a space with a smaller width in the vertical direction.

When connected to connector 65 , plug 66 is positioned behind connector 65 and above valve housing 7 . That is, the rear end surface of the connector 65 and the upper surface of the valve housing 7 define a plug arrangement space 95 in which the plug 66 is arranged. As shown in FIG. 2, the rear end of the plug 66 is sized to generally align with the rear end of the valve housing 7 in the front-rear direction. Thereby, the head of the screw 9 inserted into the mounting hole 8 is arranged below the plug arrangement space 95, and more preferably, the plug arrangement space 95 and the mounting hole 8 overlap when viewed from above. That is, the electromagnetic valve 1 is notched downward at the upper end of its rear end to form a plug arrangement space 95 for arranging the plug 66, and a mounting hole 8 is provided below the plug arrangement space 95 so as to penetrate vertically. good. In this way, the head of the screw 9 is positioned below the plug arrangement space 95, and more preferably, the plug arrangement space 95 and the mounting hole 8 overlap when viewed from above. Loosening of the screw 9 that fastens the solenoid valve 1 can be prevented.

Although the present invention has been described in terms of its preferred embodiments, it should be readily apparent to those skilled in the art that the present invention is not limited to such embodiments and that departures from the spirit of the invention are not intended to be construed as limiting the scope of the invention. It can be changed appropriately as long as it does not occur. The present invention is not limited to the orientation of the mounting surface 4 to which the solenoid valve 1 is mounted. For example, the mounting surface 4 may be vertically upward, vertically downward, or may be a slope inclined with respect to the vertical direction.

Although the solenoid valve 1 has the valve body 14 functioning as a poppet valve, it is not limited to this aspect, and has a valve chamber 13 provided in a horizontal direction and a plurality of ports 5 communicating with the valve chamber 13. Any solenoid valve such as a spool valve or an on-off valve may be used as long as it switches the connection state of 5 . In the above embodiment, the valve housing 7 is made of metal, but it is not limited to this aspect, and the valve housing 7 may be made of resin, for example.

Moreover, all of the components shown in the above embodiments are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

1: Solenoid valve 1A: Valve portion 1B: Solenoid device 2: Manifold block 3: Block through hole 3F: Block through hole 3M: Block through hole 3R: Block through hole 4: Mounting surface 4A: Screw hole 5: Port 5F: Front Port 5M: Middle port 5R: Rear port 6: Valve element 7: Valve housing 7A: Screw hole 8: Mounting hole 9: Screw 10: Valve housing concave portion 10A: Large diameter portion 10B: Small diameter portion 10C: Stepped portion 12: Rear valve Seat 13 : Valve chamber 14 : Valve body 14A : First annular member 14B : Elastic member 14C : Second annular member 15 : Valve support 16 : Cylindrical member 17 : Seal member 18 : Flange 18A : Through hole 20 : Front valve Seat 21 : Housing extension 24 : Valve support recess 25 : Seal member 26 : Retainer recess 27 : Rear spring 30 : Drive member 30A : Drive member recess 32 : Front spring 34 : Front side spring seat 35 : Rear side spring seat 42 : Bobbin 42A : Collar 43 : Solenoid 44 : Yoke 44A : Front wall 44B : Rear wall 44C : Side wall 44D : Yoke recess 44E : Through hole 45 : Fixed iron core 46 : Plunger 47 : Seal member 48 : Seal member 50 : Extension 52 : Pin 53 : Wire 60 : Circuit board 61 : Electronic component 62 : Through hole 63 : Space 65 : Connector 65A : Connector shell 65B : Electrode 66 : Plug 71 : First case 73 : Cap 73A : Through hole 74 : Screw 75 : Second case 75A : Upper wall 75B : Side wall 86 : Seal member 90 : Space 95 : Plug arrangement space A : Output port P : Supply port R : Exhaust port X : Axis line

Claims (8)

A solenoid valve,
a valve housing having a substantially rectangular parallelepiped shape and having a valve chamber with a circular cross section extending horizontally therein and a plurality of ports extending downward from the valve chamber and opening at the bottom;
a valve body slidably disposed within the valve chamber to cooperate with a valve seat provided in the valve chamber;
provided on one side in the axial direction of the valve chamber of the valve housing, displacing the valve body between a first position and a second position positioned on the other side in the axial direction of the first position; a solenoid device that causes
The valve housing is provided with a pair of mounting holes for fastening vertically penetrating both sides of the axial line of the valve chamber on the other side of the axial direction relative to the second position ,
A retainer recess having a reduced diameter and a circular cross section recessed toward the other side in the axial direction is attached to the end of the valve chamber,
a compression coil spring is received in the retainer recess for biasing the valve body toward the solenoid device;
The mounting holes are provided on both sides of the retainer recess,
The solenoid valve, wherein the mounting hole is positioned between the one side end of the retainer recess and the other side end of the retainer recess in the axial direction. 2. The solenoid valve according to claim 1, wherein said valve body has a valve body which can move toward and away from an annular valve seat formed coaxially with said valve chamber in said axial direction. a circuit board mounted on the top of the solenoid device and extending horizontally toward the valve housing;
3. The solenoid valve according to claim 1, further comprising a connector attached to the lower surface of said circuit board so as to be positioned between said valve housing and said circuit board. 4. The electromagnetic valve according to claim 3 , wherein electronic components are arranged on the lower surface of the circuit board so as to be positioned between the upper surface of the solenoid device and the lower surface of the circuit board. The circuit board is attached to an extension extending upward from the coil bobbin in the solenoid device, connected to a coil wire wound around the coil bobbin, and connected to the circuit board through a pin fixed to the coil bobbin. 5. The solenoid valve according to claim 3, wherein the solenoid valve is electrically connected to the coil wire and attached to the coil bobbin. The solenoid valve according to any one of claims 3 to 5, wherein the connector is configured such that a plug fitted to the connector can be pulled out and inserted in parallel with the axial direction. A plug arrangement space in which the plug fitted to the connector is arranged is defined by the end surface of the connector on the other side in the axial direction and the upper surface of the valve housing,
7. The solenoid valve according to claim 6, wherein the mounting hole is provided below the plug arrangement space. A solenoid valve,
a valve housing having a substantially rectangular parallelepiped shape and having a valve chamber with a circular cross section extending horizontally therein and a plurality of ports extending downward from the valve chamber and opening at the bottom;
a valve body slidably disposed within the valve chamber to cooperate with a valve seat provided in the valve chamber;
provided on one side in the axial direction of the valve chamber of the valve housing, displacing the valve body between a first position and a second position positioned on the other side in the axial direction of the first position; a solenoid device that causes
The valve housing is provided with a pair of mounting holes for fastening vertically penetrating both sides of the axial line of the valve chamber on the other side of the axial direction relative to the second position,
a circuit board mounted on the top of the solenoid device and extending horizontally toward the valve housing;
A solenoid valve, further comprising a connector attached to the lower surface of the circuit board so as to be positioned between the valve housing and the circuit board.

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