Solenoid valve and distributor solenoid valve assembly

Abstract

A solenoid valve (2, 2A, 2B, 2C) to be mounted on a manifold base (1) using fixing screws such that a plurality of the solenoid valves (2, 2A, 2B, 2C) are arranged in a row, the solenoid valve (2, 2A, 2B, 2C) comprising: a valve body (18) having a longitudinal direction, a transverse direction and a height direction; a slide valve opening (19) extending through the valve body (18) in the longitudinal direction; and a slider (16) which is slidably inserted into the slider sliding opening (19), wherein the valve body (18) has a first side surface (32) and a second side surface (33) which extend in the longitudinal direction of the valve body (18) and which run parallel to each other, wherein a first rib (41) extending in the height direction of the valve body (18) and a first recessed groove (43) extending parallel to the first rib (41) are formed on and in the first side surface (32), and wherein a second rib (42) and a second recessed groove (44) are formed on and in the second side surface (33), wherein the second rib (42) extends in the height direction of the valve body (18) at a position associated with the first recessed groove (43), wherein the second recessed groove (44) extends parallel to the first rib (41) at a position associated with the first rib (41), wherein the first recessed groove (43) is formed such that it is capable of receiving the second rib (42) of another solenoid valve (2, 2A, 2B, 2C) arranged adjacent to the first side surface (32) of the solenoid valve (2, 2A, 2B, 2C), and wherein the second recessed groove (44) is formed such that it is capable of receiving the first rib (41) of another solenoid valve (2, 2A, 2B, 2C) arranged adjacent to the second side surface (33) of the solenoid valve (2, 2A, 2B, 2C), wherein the valve body (18) has a first insertion hole (45) formed along the first rib (41) and allowing the insertion of one of the fastening screws through the first insertion hole (45), and a second insertion hole (46) formed along the second rib (42) and allowing the insertion of one of the fastening screws through the second insertion hole (46), wherein the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a manner that a portion of the first insertion hole (45) extends in a diametrical direction through the interior of the first rib (41) and a portion of the second insertion hole (46) extends in a diametrical direction through the interior of the second rib (42), and characterized in that the first and second insertion holes (45, 46) and the first and second recessed grooves (43, 44) are formed such that, in a plane (P) which is perpendicular to the first side surface (32) and the second side surface (33) and which contains an axis (L1) of the slider sliding opening (19), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (45a) of the first insertion hole (45), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (46a) of the second insertion hole (46), the distance (D2) from the axis (L1) of the slider sliding opening (19) to a bottom wall surface (43a) of the first recessed groove (43) and the distance (D2) from the axis (L1) of the Slider sliding opening (19) to a bottom wall surface (44a) of the second recessed (44) groove are equal to each other, and in the plane (P) at a position where supply (20), output (21a, 21b) and outlet connection ports (22a, 22b) communicate with the slide gate opening (19), a radius of the slide gate opening (19) is greater than the distance (D2) from the axis (L1) of the slide gate opening (19) to the bottom wall surfaces (43a, 44a) of the first and second recessed grooves (43, 44).

Description

Technical area

[0001] The present invention relates to a solenoid valve mounted on a mounting surface of a manifold base using mounting screws such that a plurality of solenoid valves are arranged in a row, and to a manifold solenoid valve assembly formed by mounting the plurality of solenoid valves on the manifold base. State of the art

[0002] In the prior art described in PTL 1, a switching valve is known that is mounted on a mounting surface of a manifold base using mounting screws such that a plurality of switching valves are arranged in a row. The switching valve has rib portions and grooves formed on and in side surfaces of a body with a sliding opening, and insertion holes formed along the rib portions through which the mounting screws are to be inserted.

[0003] The rib portions and the grooves extend in a top-down direction relative to the mounting surface of the manifold base and are each shaped to have a semicircular cross-section, wherein the cross-sectional diameter of each of the rib portions and the cross-sectional diameter of each of the grooves are substantially the same. Accordingly, the positioning of the switching valve can be performed by inserting the rib portions of the switching valve into the grooves of one of the other switching valves arranged adjacent to the switching valve. Furthermore, the plurality of switching valves can be efficiently attached to the manifold base by inserting screws or clamping members (hereinafter referred to as screws or the like) through the insertion holes, so that the switching valves are screwed onto the manifold base.

[0004] However, in the switching valve described in PTL 1, the outer diameter of the equal orifice is determined according to the distance from the axis of the sliding orifice to the bottom of each of the grooves, and therefore, it cannot be said that the thickness between a mounting orifice and the sliding orifice is efficiently utilized.

[0005] On the other hand, there is a need to reduce this type of switching valve in size and achieve a large flow rate, and it is therefore desired that the hole diameter of a sliding orifice is effectively increased relative to the width of a body.

[0006] PTL 2 discloses a power supply system for a solenoid valve assembly to achieve power supply to the solenoid valve and through manifold bases. A wiring box with a power supply terminal is mounted at one end of a manifold base. A solenoid terminal is provided, allowing direct power supply to the solenoid valve. A relay base with a relay terminal is provided for connecting the solenoid terminal to the power supply terminal. When the solenoid valve is installed on the manifold base, the pressure fluid passages communicate with each other, and the relay terminal is connected to the power supply terminal, allowing power supply through the manifold bases.

[0007] PTL 3 discloses a solenoid valve manifold, wherein a second side surface of a valve body is formed such that one end side in an axial direction of a spool valve element is farther away from a valve port than another end side in the axial direction, while a first side surface of the valve body is formed such that the other end side in the axial direction is farther away from the valve port than an end side in the axial direction of the spool valve element. An opening on a mating surface of a first output port, which is connected to a first output flow path opening to a front surface of a manifold base, is formed in a shape expanding toward the first side surface side as an opening on the mating surface of a first outlet port.

[0008] PTL4 provides a pilot-operated solenoid valve. A sliding bore is formed on both sides of a valve body, through which a sealing valve part slides. The bore diameters of the sliding bores are smaller than the bore diameter of the valve bore. Furthermore, insertion holes are formed on the sides of the sliding bores along the width direction of the valve body, through which fastening screws can penetrate.

[0009] PTL 5 discloses a manifold-type solenoid valve assembly in which a solenoid valve with an output port and a solenoid valve without an output port are mixedly mounted on a common manifold base. On a valve mounting part of the manifold base having a plurality of valve mounting parts of the same type, a first solenoid valve equipped with an output port for external piping connection is mounted, and a second solenoid valve not equipped with an output port is indirectly mounted via an intermediate block indirectly equipped with an output port for the second solenoid valve.

[0010] PTL 6 relates to a valve assembly comprising multiple valve banks designed for different nominal flow rates. Each valve bank contains a valve carrier equipped with valve units. The valve units each have a control section connected to internal signal transmission means of the valve carrier via electrical interface means. List of citationsPatent literature PTL 1: JPS 55-74876 U PTL 2: US 5 664 604 A PTL 3: JP 2013- 83 323 A PTL 4: JP 2013- 36 514 A PTL 5: US 2006 / 0283509 A1 PTL 6: EP 2 047 111 B1 Summary of the inventionTechnical problem

[0011] It is an object of the present invention to provide a solenoid valve and a manifold solenoid valve assembly each having a design structure in which the relationship between the hole diameter of a sliding port and the width of a body is further rationalized. Solution to the problem

[0012] This object is achieved by a solenoid valve according to one of claims 1 or 2 and by a distributor solenoid valve arrangement according to one of claims 7 or 8. Advantageous embodiments are the subject of the subclaims.

[0013] To solve the above-described problem, an electromagnetic valve according to one aspect of the present invention is an electromagnetic valve to be mounted on a manifold base using fastening screws in such a manner that a plurality of the electromagnetic valves are arranged in a row, the electromagnetic valve comprising a valve body having a longitudinal direction, a transverse direction, and a height direction, and in which a spool sliding hole extending through the valve body in the longitudinal direction is formed, and a spool (piston, spool) slidably fitted into the spool sliding hole. The valve body has a first side surface and a second side surface extending in the longitudinal direction of the valve body and parallel to each other.A first rib extending in the height direction of the valve body and a first recessed groove extending parallel to the first rib are formed on and in the first side surface, and a second rib and a second recessed groove are formed on and in the second side surface, wherein the second rib extends in the height direction of the valve body at a position corresponding to the first recessed groove, wherein the second recessed groove extends parallel to the second rib at a position corresponding to the first rib.The first recessed groove is shaped to receive the second rib of another solenoid valve disposed adjacent to the first side surface of the solenoid valve, and the second recessed groove is shaped to receive the first rib of another solenoid valve disposed adjacent to the second side surface of the solenoid valve. The valve body has a first insertion hole formed along the first rib and allowing insertion of one of the fastening screws through the first insertion hole, and a second insertion hole formed along the second rib and allowing insertion of one of the fastening screws through the second insertion hole.The first insertion hole and the second insertion hole are formed in the valve body such that a portion of the first insertion hole and a portion of the second insertion hole extend in a diametrical direction through the inside of the first rib and the inside of the second rib, respectively.The first and second insertion holes and the first and second recessed grooves are formed such that, in a plane perpendicular to the first side surface and the second side surface and including an axis of the slider sliding hole, the shortest distance from the axis of the slider sliding hole to a hole wall surface of the first insertion hole, the shortest distance from the axis of the slider insertion hole to a hole wall surface of the second insertion hole, the distance from the axis of the slider sliding hole to a bottom wall surface of the first recessed groove, and the distance from the axis of the slider sliding hole to a bottom wall surface of the second recessed groove are equal to each other.In the plane, at a position where supply, output, and outlet communication ports communicate with the spool slide port, a radius of the spool slide port is larger than the distance from the axis of the spool slide port to the bottom wall surfaces of the first and second recessed grooves.

[0014] Furthermore, the electromagnetic valve according to another aspect of the present invention is an electromagnetic valve to be fixed to a manifold base using fixing screws such that a plurality of electromagnetic valves are arranged in a row, the electromagnetic valve comprising a valve body having a longitudinal direction, a transverse direction, and a height direction, and in which a spool sliding hole extending through the valve body in the longitudinal direction is formed, and a spool (piston, spool) slidably fitted into the spool sliding hole. The valve body has a first side surface and a second side surface extending in the longitudinal direction of the valve body and parallel to each other.A first rib extending in the height direction of the valve body and a first recessed groove extending parallel to the first rib are formed on and in the first side surface, and a second rib and a second recessed groove are formed on and in the second side surface, wherein the second rib extends in the height direction of the valve body at a position associated with the first recessed groove, and wherein the second recessed groove extends parallel to the second rib at a position associated with the first rib.The first recessed groove is configured to receive the second rib of another solenoid valve disposed adjacent to the first side surface of the solenoid valve, and the second recessed groove is configured to receive the first rib of another solenoid valve disposed adjacent to the second side surface of the solenoid valve. The valve body includes a first insertion hole formed along the first rib and allowing insertion of one of the fastening screws through the first insertion hole, and a second insertion hole formed along the second rib and allowing insertion of the fastening screws through the second insertion hole.The first insertion hole and the second insertion hole are formed in the valve body such that a portion of the first insertion hole and a portion of the second insertion hole extend in a diametrical direction through the inside of the first rib and the inside of the second rib, respectively.When a height from the first side surface to an upper surface of the first rib and a height from the second side surface to an upper surface of the second rib are denoted by h1, a depth from the first side surface to a bottom wall surface of the first recessed groove and a depth from the second side surface to a bottom wall surface of the second recessed groove are each denoted by h2, a minimum wall thickness between a hole wall surface of the first insertion hole and the upper surface of the first rib and a minimum wall thickness between a hole wall surface of the second insertion hole and the upper surface of the second rib are each denoted by c, and a diameter of the first insertion hole and a diameter of the second insertion hole are each denoted by d, the size relationship between these values satisfies the following equations:. c+d−h1=h2 and h1>h2.

[0015] In a plane perpendicular to the first side surface and the second side surface and including an axis of the spool sliding hole, at a position where supply, output, and outlet communication holes communicate with the spool sliding hole, a radius of the spool sliding hole is larger than the distance from the axis of the spool sliding hole to the bottom wall surfaces of the first and second recessed grooves.

[0016] A cross-sectional shape of the spool sliding hole in a direction perpendicular to the axis of the spool sliding hole may be an elongated hole shape having a long axis oriented in the height direction of the valve body and a short axis oriented in the transverse direction of the valve body.

[0017] As an example of the cross-sectional shape, there is provided a shape having left and right hole side walls extending linearly in a direction in which the long axis extends and which are parallel to each other, upper and lower hole end walls, the upper hole end wall connecting the first ends of the left and right hole side walls and the lower hole end wall connecting the second ends of the left and right hole side walls, or an elliptical shape.

[0018] A manifold solenoid valve assembly according to another aspect of the present invention is a manifold solenoid valve assembly including a solenoid valve having a valve body with a longitudinal direction, a transverse direction, and a height direction, in which a spool sliding hole extending through the valve body in the longitudinal direction is formed, and a spool slidably inserted into the spool sliding hole, and a manifold base having a plurality of valve mounting surfaces on which a plurality of the solenoid valves are mounted using mounting screws in such a manner as to be arranged in a row. A first mounting hole and a second mounting hole, which allow the mounting screws to be inserted through the first mounting hole and the second mounting hole, are formed in the valve body in a pair and extend in the height direction of the valve body.A plurality of first mounting holes and a plurality of second mounting holes are formed in the valve mounting surfaces such that the first mounting holes and an associated second mounting hole are each paired with each other, and the first mounting holes are each associated with the first insertion hole and allow the electromagnetic valve to be mounted on a corresponding valve mounting surface by screwing one of the mounting screws into the first mounting hole, and the second mounting holes are each associated with the first insertion hole and allow the electromagnetic valve to be mounted on an associated valve mounting surface by screwing one of the mounting screws into the second mounting hole. The valve body has a first side surface and a second side surface that extend in the longitudinal direction of the valve body and are parallel to each other.A first rib extending along the first insertion hole and a first recessed groove extending parallel to the first rib are formed on and in the first side surface, and a second rib and a second recessed groove are formed on and in the second side surface, wherein the second rib extends along the second insertion hole at a position associated with the first recessed groove, wherein the second recessed groove extends parallel to the second rib at a position associated with the first rib.The first recessed groove is configured to receive the second rib of another solenoid valve disposed adjacent to the first side surface of the solenoid valve, and the second recessed groove is configured to receive the first rib of another solenoid valve disposed adjacent to the second side surface of the solenoid valve. The first insertion hole and the second insertion hole are formed in the valve body such that a portion of the first insertion hole and a portion of the second insertion hole extend in a diametrical direction through the interior of the first rib and the interior of the second rib, respectively.The first and second insertion holes and the first and second recessed grooves are formed such that, in a plane perpendicular to the first side surface and the second side surface and including an axis of the slider sliding hole, the shortest distance from the axis of the slider sliding hole to a hole wall surface of the first insertion hole, the shortest distance from the axis of the slider sliding hole to a hole wall surface of the second insertion hole, the distance from the axis of the slider sliding hole to a bottom wall surface of the first recessed groove, and the distance from the axis of the slider sliding hole to a bottom wall surface of the second recessed groove are equal to each other.In the plane, at a position where supply, output, and outlet communication ports communicate with the spool slide port, a radius of the spool slide port is larger than the distance from the axis of the spool slide port to the bottom wall surfaces of the first and second recessed grooves.

[0019] Furthermore, a manifold type solenoid valve assembly according to another aspect of the present invention is a manifold type solenoid valve assembly including a solenoid valve having a valve body having a longitudinal direction, a transverse direction, and a height direction and in which a spool sliding hole extending through the valve body in the longitudinal direction is formed, and a spool (piston, spool) slidably fitted into the spool sliding hole, and a manifold base having a plurality of valve mounting surfaces on which a plurality of the solenoid valves are mounted by means of mounting screws so as to be arranged in a row.A first insertion hole and a second insertion hole, which allow the fastening screws to be inserted through the first insertion hole and the second insertion hole, are formed in the valve body in such a manner that they are provided as a pair and extend in the height direction of the valve body.A plurality of first mounting holes and a plurality of second mounting holes are formed in the valve mounting surfaces such that each of the first mounting holes and an associated second mounting hole are provided as a pair, and each of the first mounting holes is associated with the first insertion hole and enables attachment of the solenoid valve to a corresponding valve mounting surface by screwing one of the mounting screws into the first mounting hole, and each of the second mounting holes is associated with the second insertion hole and enables attachment of the solenoid valve to a corresponding valve mounting surface by screwing one of the mounting screws into the second mounting hole. The valve body has a first side surface and a second side surface that extend in the longitudinal direction of the valve body and are parallel to each other.A first rib extending along the first insertion hole and a first recessed groove extending parallel to the first rib are formed on and in the first side surface, and a second rib and a second recessed groove are formed on and in the second side surface, wherein the second rib extends along the second insertion hole at a position associated with the first recessed groove, wherein the second recessed groove extends parallel to the second rib at a position associated with the first rib.The first recessed groove is configured to receive the second rib of another solenoid valve disposed adjacent to the first side surface of the solenoid valve, and the second recessed groove is configured to receive the first rib of another solenoid valve disposed adjacent to the second side surface of the solenoid valve. The first insertion hole and the second insertion hole are formed in the valve body such that a portion of the first insertion hole and a portion of the second insertion hole extend in a diametrical direction through the interior of the first rib and the interior of the second rib, respectively.When a height from the first side surface to a top surface of the first rib and a height from the second side surface to a top surface of the second rib are denoted by h1, a depth from the first side surface to a bottom wall surface of the first recessed groove and a depth from the second side surface to a bottom wall surface of the second recessed groove are each denoted by h2, a minimum wall thickness between a hole wall surface of the first insertion hole and the top surface of the first rib and a minimum wall thickness between a hole wall surface of the second insertion hole and the top surface of the second rib are each denoted by c, and a diameter of the first insertion hole and a diameter of the second insertion hole are each denoted by d, a size relationship between these values satisfies the following equations:. c+d−h1=h2 and h1>h2.

[0020] In a plane perpendicular to the first side surface and the second side surface and including an axis of the spool sliding hole, at a position where supply, output, and outlet communication holes communicate with the spool sliding hole, a radius of the spool sliding hole is larger than the distance from the axis of the spool sliding hole to the bottom wall surfaces of the first and second recessed grooves.

[0021] A cross-sectional shape of the spool sliding opening in a direction perpendicular to the axis of the spool sliding opening may have the shape of an elongated hole having a long axis oriented in the height direction of the valve body and a short axis oriented in the transverse direction of the valve body.

[0022] As an example, the cross-sectional shape is a shape having left and right hole side walls that extend linearly in a direction in which the long axis extends and that are parallel to each other, upper and lower hole end walls, the upper hole end wall connecting the first ends of the left and right hole side walls, and the lower hole end wall connecting the second ends of the left and right hole side walls, or an elliptical shape. Advantageous effects of the invention

[0023] According to the present invention, in a plane perpendicular to a first side surface and a second side surface and including the axis of a sliding hole, the shortest distance from the axis of the spool sliding hole to a hole wall surface of a first insertion hole, the shortest distance from the axis of the spool sliding hole to a hole wall surface of a second insertion hole, the distance from the axis of the spool sliding hole to a bottom wall surface of a first recessed groove, and the distance from the axis of the spool sliding hole to a bottom wall surface of a second recessed groove are equal to each other, and thus the opening diameter of the spool sliding hole can be effectively increased relative to the width of a valve body. Short description of the drawings Fig. 1 is a plan view of a manifold solenoid valve assembly incorporating solenoid valves according to the present invention. Fig. 2 is a section through Fig. 1. Fig. 3 is a side view of the distributor solenoid valve assembly, the side view showing the cross section of one of the Fig. 1 shows the solenoid valves. Fig. 4 is a plan view of the manifold solenoid valve assembly in a state in which the solenoid valves have been removed therefrom. Fig. 5 is a sectional view showing the adjacent solenoid valves in a state in which a spool is removed from one of the solenoid valves. Fig. 6 is a diagram illustrating another shape of first and second insertion holes extending through first and second ribs. Fig. 7 is a diagram showing the cross-sectional shapes of gate valve sliding holes each formed with an elongated shape. Description of embodiments

[0024] A solenoid valve and a manifold solenoid valve assembly according to an embodiment of the present invention will be described in detail below.

[0025] As in the Fig. As shown in Figures 1 to 5, a solenoid valve 2 according to the present invention includes a main valve section 14 having a spool (piston, spool) 16 installed therein, the spool being used to switch flow paths, and an electromagnetically controlled pilot valve 15 that actuates the spool 16. A plurality of solenoid valves 2 are mounted on a manifold base 1 in such a manner as to be arranged in a row, thereby forming the above-mentioned manifold solenoid valve assembly 50.

[0026] The above-mentioned manifold base 1 is formed by a block that is long in one direction and whose cross-section has a rectangular or similar shape. The solenoid valves 2 are mounted on a plurality of flat valve mounting surfaces 3 (see Fig. 4) formed on the upper surface of the distributor base 1. In the distributor base 1, as shown in Fig. 2, fluid flow paths 6, 7A, and 7B, which are used for the collective supply and collective discharge of a pressurized fluid, are formed such that they extend through the distributor base 1 from one end to the other end of the distributor base 1 in the longitudinal direction of the distributor base 1. Branch openings 6a branching from the fluid flow path 6, branch openings 7a branching from the fluid flow path 7A, and branch openings 7b branching from the fluid flow path 7B open to the above-mentioned mounting surfaces 3. In Fig. 2, the first fluid flow path 6, positioned at the center of the fluid flow paths, is used to collectively supply the pressurized fluid, and the second and third fluid flow paths 7A and 7B, located on both sides of the first fluid flow path 6, are used to collectively discharge the pressurized fluid. The above-mentioned first fluid flow path 6 extends in a direction parallel to the direction in which the electromagnetic valves 2 are arranged in a row, in a central portion of the manifold base 1 in the longitudinal direction of the manifold base 1. The above-mentioned second and third fluid flow paths 7A and 7B are located on both sides of the first fluid flow path 6 and extend parallel to the first fluid flow path 6. In the present embodiment, the above-mentioned pressurized fluid is compressed air.

[0027] As shown in Fig. 4, a pair of first and second mounting holes 9a and 9b are formed in each of the above-mentioned valve mounting surfaces 3 so as to correspond to first and second insertion holes 45 and 46 described later. The pair of first and second mounting holes 9a and 9b are constituted by threaded holes into which mounting screws 47 for attaching the electromagnetic valve 2 can be screwed. Mounting holes 4, which are used for installing the manifold base 1 to a peripheral device, for example, by means of bolts or screws, are formed in the manifold base 1.

[0028] As can be seen from the Fig. 1 to 3, a valve body 18 of the above-mentioned main valve portion 14 is formed into a substantially rectangular parallelepiped shape having a longitudinal direction, a transverse direction, and a height direction. Furthermore, a spool sliding hole 19, in which the spool 16 is slidably received, is received in the valve body 18 so as to extend through the valve body in the longitudinal direction. The cross-sectional shape of the spool sliding hole 19 in a direction perpendicular to an axis L1 of the spool sliding hole 19 is circular.

[0029] A fluid supply connection port 20, two output connection ports 21a and 21b located on both sides of the fluid supply connection port 20, and two outlet connection ports 22a and 22b located adjacent to the output connection ports 21a and 21b, respectively, open to the spool sliding port 19. Flow paths between the corresponding connection ports 20 to 22b are switched by the above-mentioned spool 16. In the valve body 18, a pilot or control path 23, which allows the flow of a pilot or control fluid for driving the corresponding spool 16, is formed to run parallel to the spool sliding port 19 in the longitudinal direction of the valve body 18. The pilot path 23 communicates with the connection port 20.

[0030] With reference to Fig. 5, the above-mentioned valve body 18 has a first side surface 32, a second side surface 33, a bottom surface 34 and an upper surface 35 ( Fig. 2), each extending along the axis L1 of the slider sliding opening 19, wherein the first side surface 32 and the second side surface 33 run parallel to each other and wherein the bottom surface 34 and the upper surface 35 run parallel to each other.

[0031] The above-mentioned bottom surface 34 is formed to have a substantially rectangular shape and be substantially flat for mounting on one of the valve mounting surfaces 3 of the above-mentioned manifold base 1. The supply connection port 20 opens at the center of the bottom surface 34. The outlet connection ports 22a and 22b open at positions on both sides of the connection port 20 so as to be substantially symmetrical to each other relative to the connection port 20. The positions at which the connection ports 20, 22a, and 22b open are positions at which the connection ports 20, 22a, and 22b communicate with the associated branch holes 6a, 7a, and 7b when the electromagnetic valve 2 is mounted on one of the valve mounting surfaces 3.

[0032] Pairs of first and second output ports A and B used for discharging the pressure fluid from the above-mentioned solenoid valves 2 are formed on a side surface 1a of the above-mentioned manifold base 1 in the transverse direction of the manifold base 1, the number of the pairs of first and second output ports A and B being the same as the number of the above-mentioned solenoid valves 2. In addition, the above-mentioned first output ports A and the above-mentioned second output ports B are provided with output communication holes 8a and 8b, respectively.Output connection ports 8b communicate, and the output connection ports 8a and 8b open to the above-mentioned mounting surfaces 3 in such a manner that each of the output ports 8a is located between one of the branch ports 6a and a corresponding branch port 7a, and that each of the output connection ports 8b is located between one of the branch ports 6a and a corresponding branch port 7b. When the above-mentioned electromagnetic valves 2 are mounted on the above-mentioned mounting surfaces 3, the output connection ports 8a communicate with the above-mentioned output connection ports 21b, and the output connection ports 8b communicate with the above-mentioned output connection ports 21a.

[0033] A first piston cover 28a and a second piston cover 28b are attached to the end portions of the valve body 18 in the longitudinal direction of the valve body 18, that is, the first piston cover 28a and the second piston cover 28b are positioned at a first end and a second end of the spool sliding hole 19, respectively, in a direction in which the axis L1 of the spool sliding hole 19 extends. A piston chamber 29a is formed between the first piston cover 28a and the spool 16, and a piston 29, which is brought into contact with a first end portion 16a of the spool 16, is arranged in the piston chamber 29a. A pressure chamber 30a is formed on one side of the piston 29. A pressure chamber 30b, to which the pilot fluid used to return the above-mentioned spool 16 to its original position is constantly supplied, is formed between the second piston cover 28b and the spool 16.The pressure chamber 30b communicates with the above-mentioned communication port 20 via the pilot path 23. No piston is provided in the above-mentioned pressure chamber 30b, and a second end portion 16b of the above-mentioned spool 16 serves as a piston.

[0034] Note that the reference numeral 24 in Fig. 2 denotes an actuating element for manual operation and that the actuating element is used for manually restoring the state in which current is supplied to the above-mentioned pilot valve 15.

[0035] First and second ribs 41 and 42 and first and second recessed grooves 43 and 44 are formed on and in the valve body 18 and will be described below. The first rib 41, which extends in the height direction of the valve body 14, and the first recessed groove 43, which extends parallel to the first rib 41, are formed on and in the first side surface 32 of the above-mentioned valve body 14. The second rib 42 and the second recessed groove 44 are formed on and in the second side surface 33 of the above-mentioned valve body 14, wherein the second rib 42 extends in the height direction of the valve body 14 at a position corresponding to the first recessed groove 43, and the second recessed groove 44 extends parallel to the second rib 42 at a position corresponding to the first rib 41.

[0036] The first and second ribs 41 and 42 and the first and second recessed grooves 43 and 44 each have a transverse cross-sectional shape resembling an isosceles trapezoid from which the lower base thereof has been removed. Upper surfaces 41a and 42a of the first and second ribs 41 and 42 and bottom wall surfaces 43a and 44a of the first and second recessed grooves 43 and 44 are flat and parallel to the first and second side surfaces 32 and 33. The height of the first and second ribs 41 and 42 is slightly higher than the depth of the first and second recessed grooves 43 and 44, respectively. Thus, when the plurality of electromagnetic valves 2 are mounted on the manifold base in such a manner as to be arranged in a row, the second rib 42 and the first rib 41 of each of the electromagnetic valves 2 are respectively disposed in the first recessed groove 43 and the first recessed groove 44.the second recessed groove 44 of one of the other solenoid valves 2, which is arranged next to the solenoid valve 2, and a narrow gap is created between two associated adjacent solenoid valves 2 and 2.

[0037] In the valve body 18, the first and second insertion holes 45 and 46, into which the fastening screws 47 can be screwed, are formed along the first and second ribs 41 and 42, respectively. The first insertion hole 45 is formed to extend to both the first rib 41 and a frame body portion 18a of the valve body 18, and the second insertion hole 46 is formed to extend to both the second rib 42 and the frame body portion 18a of the valve body 18.In other words, the first insertion hole 45 and the second insertion hole 46 are shaped such that, in the diametrical direction of the first insertion hole 45, half of the first insertion hole 45 extends through the interior of the first rib 41, while the other half of the first insertion hole 45 extends through the interior of the frame body portion 18a of the valve body 18 excluding the above-mentioned first rib 41, and that half of the second insertion hole 46 extends through the interior of the second rib 42 in the diametrical direction of the second insertion hole 46, while the other half of the second insertion hole 46 extends through the interior of the frame body portion 18a of the valve body 18 excluding the above-mentioned second rib 42.

[0038] The positional relationship between the first and second ribs 41 and 42, the first and second recessed grooves 43 and 44, and the first and second insertion holes 45 and 46 of the solenoid valve 2 will now be explained. In a plane P which is perpendicular to the first side surface 32 and the second side surface 33 and which contains the axis L1 of the spool sliding hole 19, the first and second recessed grooves 43 and 44 and the first and second insertion holes 45 and 46 are formed in the valve body 18, wherein the positional relationship in which the above-mentioned distances D1 and D2 are equal to each other is maintained when the distance between a portion of a hole wall surface 45a of the first insertion hole 45, the portion being closest to the spool sliding hole, and the axis L1 and the distance between a portion of a hole wall surface 46a of the second insertion hole 46, the portion being closest to the spool sliding hole 19,and the axis L1 are each designated D1, and the distance between the bottom wall surface 43 of the first recessed groove 43 and the above-mentioned axis L1 and the distance between the bottom wall surface 44a of the second recessed groove 44 and the above-mentioned axis L1 are each designated D2.

[0039] In the case of forming the spool sliding hole 19 in the valve body 18, if the above-mentioned distances D1 and D2 are different from each other, the diameter of the spool sliding hole 19 must be selected to correspond to one of the distances that is shorter. Accordingly, if the distance D1 is not longer than the distance D2, the thickness between a side wall 19a of the spool sliding hole 19 and each of the hole wall surfaces 45a and 46a of the first and second insertion holes 45 and 46 becomes unnecessarily large. If the distance D2 is longer than the distance D1, the thickness between the side wall 19a of the spool sliding hole 19 and each of the bottom wall surfaces 43a and 44a of the first and second recessed grooves 43 and 44 becomes unnecessarily large. Therefore, by choosing the above-mentioned distances D1 and D2 to be equal to each other, it can be avoided that the above-mentioned thickness becomes unnecessarily large.As a result, the hole diameter of the slide opening 19 can be effectively increased relative to the width H of the valve body 18.

[0040] If, in the above-mentioned plane P, the distance between the side wall 19a of the spool sliding hole 19 and each of the bottom wall surfaces 43a and 44a of the first and second recessed grooves 43 and 44 and the distance between the side wall 19a and each of the hole wall surfaces 45a and 46a of the first and second insertion holes 45 and 46 are respectively denoted by c2, a diameter h3 of the spool sliding hole 19 can be expressed by the following equation (1). h3=2×(D1*c2)=2x(D2*c2)

[0041] Note that even if the first insertion hole 45, which is in Fig. 5, is formed at a position spaced from the upper surface 41a of the first rib 41 by the distance c2, and the second insertion hole 46 shown in Fig. 5, is formed at a position spaced from the upper surface 42a of the first rib 42 by the distance c2, the first and second insertion holes 45 and 46 are not necessarily formed at these positions. As shown in Fig. For example, as shown in Fig. 6, the first insertion hole 45 may be formed at a position where a portion of the hole wall surface 45a opens to the above-mentioned upper surface 41a, and the second insertion hole 46 may be formed at a position where a portion of the hole wall surface 46a opens to the above-mentioned upper surface 42a. In this case, it is desirable that the transverse cross-sectional area of each of the first and second insertion holes 45 and 46 has a larger arc shape.

[0042] When, in the above-mentioned plane P, the distance between the first side surface 32 and the upper surface 41a of the first rib 41 and the distance between the second side surface 33 and the upper surface 42a of the second rib 42 (the height of each of the first and second ribs 41 and 42) are respectively denoted by h1, the distance from the first side surface 32 to the bottom wall surface 43 of the first recessed groove 43 and the distance from the second side surface 33 to the bottom wall surface 44a of the second recessed groove 44 (the size of each of the first and second recessed grooves 43 and 44) are respectively denoted by h2, the distance between the above-mentioned upper surface 41a and the hole wall surface 45a of the first insertion hole 45 and the distance between the above-mentioned upper surface 42a and the hole wall surface 46a of the second insertion hole 46 are respectively denoted by c, and the diameter of each of the first and second insertion holes 45 and 46 are designated d,the following equation (2) is also fulfilled. c+dh1=h2

[0043] Here, the groove depth h2 of each of the first and second recessed grooves 43 and 44 is selected to be smaller than the height h1 of each of the first ribs 41 and 42 by a value α. Thus, the following equation (3) can be obtained by substituting h2 = h1-α into the equation (2). d1=(α+c+d) / 2

[0044] As described above, the electromagnetic valve 2 according to the present embodiment is configured to satisfy the above equation (1), or to satisfy the above equation (2) or the above equation (3). Thus, the diameter of the spool sliding hole 19 can be increased relative to the width of the valve body 13.

[0045] The distributor solenoid valve assembly 50 according to the present invention will now be described. As shown in Fig. 3, the manifold solenoid valve assembly 50 according to the present invention includes a plurality of the above-described solenoid valves 2 and the above-described manifold base 1. The solenoid valves 2 are mounted on the valve mounting surfaces 3 of the manifold base 1 by means of the mounting screws 47. Since all the solenoid valves 2 included in the manifold solenoid valve assembly 50 have a configuration the same as the configuration of the above-described solenoid valve 2, and since the manifold base 1 included in the manifold solenoid valve assembly 50 has a configuration the same as the configuration of the above-described manifold 1, the description of these configurations will be omitted.

[0046] In addition, although in the above-described solenoid valve 2 and the above-described distributor solenoid valve assembly 50, the cross-sectional shape of the spool sliding hole 19 in the direction perpendicular to the axis L1 is a circular shape, the cross-sectional shape may also be an elongated hole shape as shown in Fig.7, with a long axis oriented in the height direction of the valve body 18 and a short axis oriented in the transverse direction. Examples of this long hole shape include a rectangular shape such as that shown in an electromagnetic valve 2A, an elliptical shape such as that shown in an electromagnetic valve 2B, and a racetrack-like shape such as that shown in an electromagnetic valve 2C, having left and right hole side walls 19b that extend linearly in the long axis direction and are parallel to each other, an upper hole end wall 19c that connects first ends of the left and right hole side walls 19b to each other, and a lower hole end wall 19d that connects second ends of the left and right hole side walls 19b to each other. In this case, the cross-sectional shape of a land portion provided on the spool 16 is the same as the cross-sectional shape of the spool sliding hole 19.

[0047] Also, in the case of the spool sliding hole 19 whose cross section has an elongated hole shape as described above, by forming the electromagnetic valves 2A to 2C satisfying the above equation (1) or the above equation (2) or (3), the hole diameter of the spool sliding hole relative to the width of the body can be effectively increased compared with the case where the spool sliding hole 19 has a circular cross section.

[0048] Although the solenoid valve and the manifold solenoid valve assembly according to the embodiment of the present invention have been described in detail, the present invention is not limited to the above-described embodiment. Various design changes can be made without departing from the scope of the present invention. Although, in the above-described embodiment, the cross-sectional shapes of the first and second ribs 41 and 42 in the transverse direction and the groove shapes of the first and second recessed grooves 43 and 44 are each trapezoidal, these shapes may be, for example, an annular U-shape having two short sides and one long side of a rectangle or a V-shape having two slanted sides of a triangle, as long as the shapes are similar to each other, so that the positioning of the solenoid valve 2 to be mounted on the manifold base 1 can be performed. List of reference symbols 1 distribution base 2, 2A, 2B, 2C solenoid valve 3 Valve mounting surface 9a first mounting hole 9b second mounting hole 16 slides (piston, coil) 18 valve body 19 Slider opening 19b left and right perforated side walls 19c upper hole end wall 19d lower hole end wall 32 first side surface 33 second side surface 41 first rib 42 second rib 43 first recessed groove 43a Floor wall area 44 second recessed groove 44a Floor wall area 45 first insertion hole 45a Perforated wall surface 46 second insertion hole 46a Perforated wall surface 50 Distributor solenoid valve assembly L1 axis (of the slider opening) P Level D1, D2 distance

Claims

[1] A solenoid valve (2, 2A, 2B, 2C) to be mounted on a manifold base (1) using fixing screws such that a plurality of the solenoid valves (2, 2A, 2B, 2C) are arranged in a row, the solenoid valve (2, 2A, 2B, 2C) comprising: a valve body (18) having a longitudinal direction, a transverse direction and a height direction; a slide opening (19) extending through the valve body (18) in the longitudinal direction; and a slider (16) which is slidably inserted into the slider opening (19), wherein the valve body (18) has a first side surface (32) and a second side surface (33) which extend in the longitudinal direction of the valve body (18) and which run parallel to each other, wherein a first rib (41) extending in the height direction of the valve body (18) and a first recessed groove (43) extending parallel to the first rib (41) are formed on and in the first side surface (32), and wherein a second rib (42) and a second recessed groove (44) are formed on and in the second side surface (33), wherein the second rib (42) extends in the height direction of the valve body (18) at a position associated with the first recessed groove (43), wherein the second recessed groove (44) extends parallel to the first rib (41) at a position associated with the first rib (41), wherein the first recessed groove (43) is formed such that it is capable of receiving the second rib (42) of another solenoid valve (2, 2A, 2B, 2C) arranged adjacent to the first side surface (32) of the solenoid valve (2, 2A, 2B, 2C), and wherein the second recessed groove (44) is formed such that it is capable of receiving the first rib (41) of another solenoid valve (2, 2A, 2B, 2C) arranged adjacent to the second side surface (33) of the solenoid valve (2, 2A, 2B, 2C), wherein the valve body (18) has a first insertion hole (45) formed along the first rib (41) and allowing the insertion of one of the fastening screws through the first insertion hole (45), and a second insertion hole (46) formed along the second rib (42) and allowing the insertion of one of the fastening screws through the second insertion hole (46), wherein the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a manner that a portion of the first insertion hole (45) extends in a diametrical direction through the interior of the first rib (41) and a portion of the second insertion hole (46) extends in a diametrical direction through the interior of the second rib (42), and characterized by , that the first and second insertion holes (45, 46) and the first and second recessed grooves (43, 44) are formed such that, in a plane (P) which is perpendicular to the first side surface (32) and the second side surface (33) and which contains an axis (L1) of the slider sliding opening (19), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (45a) of the first insertion hole (45), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (46a) of the second insertion hole (46), the distance (D2) from the axis (L1) of the slider sliding opening (19) to a bottom wall surface (43a) of the first recessed groove (43) and the distance (D2) from the axis (L1) of the Slider sliding opening (19) to a bottom wall surface (44a) of the second recessed (44) groove are equal to each other, and in the plane (P) at a position where supply (20), output (21a, 21b) and outlet connection ports (22a, 22b) communicate with the spool slide port (19), a radius of the spool slide port (19) is greater than the distance (D2) from the axis (L1) of the spool slide port (19) to the bottom wall surfaces (43a, 44a) of the first and second recessed grooves (43, 44). [2] A solenoid valve (2, 2A, 2B, 2C) to be mounted on a manifold base (1) by means of fixing screws such that a plurality of the solenoid valves (2, 2A, 2B, 2C) are arranged in a row, the solenoid valve (2, 2A, 2B, 2C) comprising: a valve body (18) having a longitudinal direction, a transverse direction and a height direction; a slide opening (19) extending through the valve body (18) in the longitudinal direction; and a slider (16) which is slidably inserted into the slider opening (19), wherein the valve body (18) has a first side surface (32) and a second side surface (33) which extend in the longitudinal direction of the valve body (18) and which run parallel to each other, wherein a first rib (41) extending in the height direction of the valve body (18) and a first recessed groove (43) extending parallel to the first rib (41) are formed on and in the first side surface (32), and wherein a second rib (42) and a second recessed groove (44) are formed on and in the second side surface (33), wherein the second rib (42) extends in the height direction of the valve body (18) at a position associated with the first recessed groove (43), wherein the second recessed groove (44) extends parallel to the second rib (42) at a position associated with the first rib (41), wherein the first recessed groove (43) is shaped such that it is capable of receiving the second rib (42) of another solenoid valve (2, 2A, 2B, 2C) which is arranged adjacent to the first side surface (32) of the solenoid valve (2, 2A, 2B, 2C), and wherein the second recessed groove (44) is shaped such that it is capable of receiving the first rib (41) of another solenoid valve (2, 2A, 2B, 2C) which is arranged adjacent to the second side surface (33) of the solenoid valve (2, 2A, 2B, 2C), wherein the valve body (18) has a first insertion hole (45) formed along the first rib (41) and allowing the insertion of the fastening screws through the first insertion hole (45), and a second insertion hole (46) formed along the second rib (42) and allowing the insertion of one of the fastening screws through the second insertion hole (46), wherein the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a manner that a portion of the first insertion hole (45) extends in a diametrical direction through the interior of the first rib (41) and a portion of the second insertion hole (46) extends in a diametrical direction through the interior of the second rib (42), and characterized by , that then, when a height from the first side surface (32) to an upper surface of the first rib (41) and a height from the second side surface (33) to an upper surface of the second rib (42) are each denoted by h1, a depth from the first side surface (32) to a bottom wall surface (43a) of the first recessed groove (43) and a depth from the second side surface (33) to a bottom wall surface (44a) of the second recessed groove (44) are each denoted by h2, a minimum wall thickness between a hole wall surface (45a) of the first insertion hole (45) and the upper surface of the first rib (41) and a minimum wall thickness between a hole wall surface (46a) of the second insertion hole (46) and the upper surface of the second rib (42) are each denoted by c, and a diameter of the first insertion hole (45) and a diameter of the second insertion hole (46) are each denoted by d are designated,a size relationship between these values satisfies the following equations:, c+d−h1=h2 and h1>h2, and in a plane (P) which is perpendicular to the first side surface (32) and the second side surface (33) and which includes an axis (L1) of the spool sliding opening, at a position where supply (20), output (21a, 21b) and outlet connection ports (22a, 22b) communicate with the spool sliding opening (19), a radius of the spool sliding opening (19) is greater than the distance (D2) from the axis (L1) of the spool sliding opening (19) to the bottom wall surfaces (43a, 44a) of the first and second recessed grooves (43, 44). [3] The electromagnetic valve (2, 2A, 2B, 2C) according to claim 1, wherein a cross-sectional shape of the spool sliding hole (19) in a direction perpendicular to the axis (L1) of the spool sliding hole (19) is an elongated hole shape having a long axis oriented in the height direction of the valve body (18) and a short axis oriented in the transverse direction of the valve body (18). [4] The electromagnetic valve (2, 2A, 2B, 2C) according to claim 2, wherein a cross-sectional shape of the spool sliding hole (19) in a direction perpendicular to the axis (L1) of the spool sliding hole (19) is an elongated hole shape having a long axis oriented in the height direction of the valve body (18) and a short axis oriented in the transverse direction of the valve body (18). [5] The electromagnetic valve (2, 2A, 2B, 2C) according to claim 3, wherein the cross-sectional shape is a shape having left and right hole side walls (19b) which extend linearly in a direction in which the long axis extends and which are parallel to each other, upper and lower hole end walls (19c, 19d), the upper hole end wall (19c) connecting first ends of the left and right hole side walls (19b) to each other, the lower hole end wall (19d) connecting second ends of the left and right hole side walls (19b) to each other, or an elliptical shape. [6] The electromagnetic valve (2, 2A, 2B, 2C) according to claim 4, wherein the cross-sectional shape is a shape having left and right hole side walls (19b) extending linearly in a direction in which the long axis extends and which are parallel to each other, upper and lower hole end walls (19c, 19d), the upper hole end wall (19c) connecting first ends of the left and right hole side walls (19b) to each other, the lower hole end wall (19d) connecting second ends of the left and right hole side walls (19b) to each other, or an elliptical shape. [7] A distributor solenoid valve assembly (50) comprising: a solenoid valve (2, 2A, 2B, 2C) having a valve body (18) having a longitudinal direction, a transverse direction and a height direction and in which a spool sliding opening (19) is formed which extends through the valve body (18) in the longitudinal direction, and having a spool (16) which is slidably inserted into the spool sliding opening (19); and a manifold base (1) having a plurality of valve mounting surfaces (3) on which a plurality of electromagnetic valves (2, 2A, 2B, 2C) are mounted using mounting screws in such a way that they are arranged in a row, wherein a first insertion hole (45) and a second insertion hole (46) allowing the mounting screws to be inserted through the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a way that they are provided in pairs and extend in the height direction of the valve body (18), wherein a plurality of first fastening holes (9a) and a plurality of second fastening holes (9b) are formed in the valve fastening surfaces (3) in such a manner that each of the first fastening holes (9a) and a corresponding second fastening hole (9b) are paired with each other and that each of the first fastening holes (9a) is associated with the first insertion hole (45) and enables the attachment of the electromagnetic valve (2, 2A, 2B, 2C) to a corresponding valve mounting surface (3) by screwing one of the fastening screws into the first fastening hole (9a), and that each of the second fastening holes (9b) is associated with the second insertion hole (46) and enables the attachment of the electromagnetic valve (2, 2A, 2B, 2C) to a corresponding valve mounting surface (3) by screwing one of the fastening screws into the second fastening hole (9b), wherein the valve body (18) has a first side surface (32) and a second side surface (33) which extend in the longitudinal direction of the valve body (18) and which run parallel to each other, wherein a first rib (41) extending along the first insertion hole (45) and a first recessed groove (43) extending parallel to the first rib (41) are formed on and in the first side surface (32), and wherein a second rib (42) and a second recessed groove (44) are formed on and in the second side surface (33), wherein the second rib (42) extends along the second insertion hole (46) at a position associated with the first recessed groove (43), wherein the second recessed groove (44) extends parallel to the second rib (42) at a position associated with the first rib (41), wherein the first recessed groove (43) is formed in such a way that it is capable of receiving the second rib (42) of another electromagnetic valve (2, 2A, 2B, 2C) arranged adjacent to the first side surface (32) of the electromagnetic valve (2, 2A, 2B, 2C), and wherein the second recessed groove (44) is formed in such a way that it is capable of receiving the first rib (41) of another electromagnetic valve (2, 2A, 2B, 2C) arranged adjacent to the second side surface (33) of the electromagnetic valve (2, 2A, 2B, 2C), wherein the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a manner that a portion of the first insertion hole (45) extends in a diametrical direction through the interior of the first rib (41) and a portion of the second insertion hole (46) extends in a diametrical direction through the interior of the second rib (42), and characterized by , that the first and second insertion holes and the first and second recessed grooves (44) are formed in such a manner that in a plane (P), which is perpendicular to the first side surface (32) and the second side surface (33) and which contains an axis (L1) of the slider sliding opening (19), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (45a) of the first insertion hole (45), the shortest distance (D1) from the axis (L1) of the slider sliding opening (19) to a hole wall surface (46a) of the second insertion hole (46), the distance (D2) from the axis (L1) of the slider sliding opening (19) to a bottom wall surface (43a) of the first recessed groove (43) and the distance (D2) from the axis (L1) of the slider sliding opening (19) to a bottom wall surface (44a) of the second recessed groove (44) are equal to each other, and in the plane (P) at a position where supply (20), output (21a, 21b) and outlet connection ports (22a, 22b) communicate with the slide gate opening (19), a radius of the slide gate opening (19) greater than the distance (D2) from the axis (L1) of the slide gate opening (19) to the bottom wall surfaces (43a, 44a) of the first and second recessed grooves (43, 44). [8] A distributor solenoid valve assembly (50) comprising: a solenoid valve (2, 2A, 2B, 2C) having a valve body (18) having a longitudinal direction, a transverse direction and a height direction and in which a spool sliding opening (19) extending in the longitudinal direction through the valve body (18) is formed, and having a spool (16) slidably inserted into the spool sliding opening (19); and a manifold base (1) having a plurality of valve mounting surfaces (3) on which a plurality of the electromagnetic valves (2, 2A, 2B, 2C) are mounted using mounting screws in such a way that they are arranged in a row, wherein a first insertion hole (45) and a second insertion hole (46), which allow the insertion of the fastening screws through the first insertion hole (45) and the second insertion hole (46), are formed in the valve body (18) in such a manner that they are paired with each other and extend in the height direction of the valve body (18), wherein a plurality of first mounting holes (9a) and a plurality of second mounting holes (9b) are formed in the valve mounting surfaces (3) in such a way that each of the first mounting holes (9a) and a corresponding second mounting hole (9b) are provided as a pair, and that each of the first mounting holes (9a) is associated with the first insertion hole (45) and allows the attachment of the electromagnetic valve (2, 2A, 2B, 2C) to a corresponding valve mounting surface (3) by screwing one of the mounting screws into the first mounting hole (9a), and that each of the second mounting holes (9b) is associated with the second insertion hole (46) and allows the attachment of the electromagnetic valve (2, 2A, 2B, 2C) to a corresponding valve mounting surface (3) by screwing one of the mounting screws into the second mounting hole (9b), wherein the valve body (18) has a first side surface (32) and a second side surface (33) which extend in the longitudinal direction of the valve body (18) and which run parallel to each other, wherein a first rib (41) extending along the first insertion hole (45) and a first recessed groove (43) extending parallel to the first rib (41) are formed on and in the first side surface (32), and wherein a second rib (42) and a second recessed groove (44) are formed on and in the second side surface (33), wherein the second rib (42) extends along the second insertion hole (46) at a position associated with the first recessed groove (43), wherein the second recessed groove (44) extends parallel to the second rib (42) at a position associated with the first rib (41), wherein the first recessed groove (43) is formed in such a way that it is capable of receiving the second rib (42) of another electromagnetic valve (2, 2A, 2B, 2C) arranged adjacent to the first side surface (32) of the electromagnetic valve (2, 2A, 2B, 2C), and wherein the second recessed groove (44) is formed in such a way that it is capable of receiving the first rib (41) of another electromagnetic valve (2, 2A, 2B, 2C) arranged adjacent to the second side surface (33) of the electromagnetic valve (2, 2A, 2B, 2C), wherein the first insertion hole (45) and the second insertion hole (46) are formed in the valve body (18) in such a manner that a portion of the first insertion hole (45) extends in a diametrical direction through the interior of the first rib (41) and a portion of the second insertion hole (46) extends in a diametrical direction through the interior of the second rib (42), and characterized by , that then, when a height from the first side surface (32) to an upper surface of the first rib (41) and a height from the second side surface (33) to an upper surface of the second rib (42) are each denoted by h1, a depth from the first side surface (32) to a bottom wall surface (43a) of the first recessed groove (43) and a depth from the second side surface (33) to a bottom wall surface (44a) of the second recessed groove (44) are each denoted by h2, a minimum wall thickness between a hole wall surface (45a) of the first insertion hole (45) and the upper surface of the first rib (41) and a minimum wall thickness between a hole wall surface (46a) of the second insertion hole (46) and the upper surface of the second rib (42) are each denoted by c, and a diameter of the first insertion hole (45) and a diameter of the second insertion hole (46) are each denoted by d a size relationship between these values,satisfies the following equations:, c+d−h1=h2 and h1>h2, and in a plane (P) which is perpendicular to the first side surface (32) and the second side surface (33) and which includes an axis (L1) of the spool sliding opening, at a position where supply (20), output (21a, 21b) and outlet connection ports (22a, 22b) communicate with the spool sliding opening (19), a radius of the spool sliding opening (19) is greater than the distance (D2) from the axis (L1) of the spool sliding opening (19) to the bottom wall surfaces (43a, 44a) of the first and second recessed grooves (43, 44). [9] The manifold solenoid valve assembly (50) according to claim 7, wherein a cross-sectional shape of the spool sliding hole (19) in a direction perpendicular to the axis (L1) of the spool sliding hole (19) is an elongated hole shape having a long axis oriented in the height direction of the valve body (18) and a short axis oriented in the width direction of the valve body (18). [10] The manifold solenoid valve assembly (50) according to claim 8, wherein a cross-sectional shape of the spool sliding hole (19) in a direction perpendicular to the axis (L1) of the spool sliding hole (19) is an elongated hole shape having a long axis oriented in the height direction of the valve body (18) and a short axis oriented in the width direction of the valve body (18). [11] The manifold solenoid valve assembly (50) according to claim 9, wherein the cross-sectional shape is a shape having left and right hole side walls (19b) extending linearly in a direction in which the long axis extends and which are parallel to each other, upper and lower hole end walls (19c, 19d), the upper hole end wall (19c) connecting first ends of the left and right hole side walls (19b) to each other, the lower hole end wall (19d) connecting second ends of the left and right hole side walls (19b) to each other, or an elliptical shape. [12] The manifold solenoid valve assembly (50) according to claim 10, wherein the cross-sectional shape is a shape having left and right hole side walls (19b) extending linearly in a direction in which the long axis extends and which are parallel to each other, upper and lower hole end walls (19c, 19d), the upper hole end wall (19c) connecting first ends of the left and right hole side walls (19b) to each other, the lower hole end wall (19d) connecting second ends of the left and right hole side walls (19b) to each other, or an elliptical shape.

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