JPH06185654A - Solenoid valve - Google Patents

Abstract

PURPOSE:To realize the thinning of a solenoid valve by, in the solenoid valve having an electromagnetic coil and a movable iron core within a rectangular casing, pressing the above coil in between the casing and an attaching member in a direction rectangular to the axial direction of the above coil and thereby fixing it. CONSTITUTION:In a pilot valve 10 used for a valve manifold, a casing 16 formed into a rectangular parallelepiped whose length in the direction of depth is shorter than the length of each side on both its side faces is arraragedly provided with an electromagnetic coil 104 including a coil winding 128 and yokes 122, 124 so that the axis of the coil 104 may be parallel to both the side faces of the casing 16 In addition, a movable iron core 106 which can move back and forth in the axial direction of the coil 104 is provided in the coil 104. The coil 104 is pressed in between the casing 16 and/or an attaching member 18 fixed its the casing 16 in a direction which is rectangular to both the side faces of the casing 16 and moreover to the axial direction of the coil 104 and fixed by a pin 38 threadedly engaged on the casing 16.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to solenoid valves.

[0002]

2. Description of the Related Art First, the structure of a solenoid valve will be described. A pilot valve used in the valve manifold shown in FIG. 6 will be described as an example of the solenoid valve. The pilot valve 100 has a casing 102 formed by using a resin material in a rectangular parallelepiped whose length in the thickness direction A is shorter than the length of each side on both sides.
And an electromagnetic coil 104 which is built in the casing 102 and is arranged so that the axis B is parallel to both side surfaces of the casing 102, and the electromagnetic coil 104 which is built in the casing 102 and
The movable coil core 106 is provided so as to be movable back and forth in the direction of the axis B of the electromagnetic coil 104, and is driven by controlling energization of the electromagnetic coil 104.

In more detail, the casing 10
2 is a main body 108, a bottom plate 110, and a cover (not shown)
The main body 108 is provided with an accommodating portion 112 for accommodating the electromagnetic coil 104. Further, a screw hole 116 is formed in a surface 114 of the housing portion 112 facing the bottom plate 110.
Is provided. The bottom plate 110 also has an opposing surface 114.
A through hole 118 is provided at a position corresponding to the screw hole 116. The electromagnetic coil 104 is formed in a U shape and has a first yoke 122 having a cylindrical fixed core 120 projectingly provided in a central portion thereof and a square plate-shaped outer shape.
A second yoke 124 attached to both ends of the first yoke 122 to form a magnetic path together with the first yoke 122; and a tubular body having flanges formed at both ends, the second yoke being inserted into the first yoke 122. A bobbin 126 formed to be wearable,
The coil winding 128 is formed by winding a wire around the bobbin 126. The outer diameter of the fixed core 120 is
The fixed core 120 is formed so that it can be inserted into the bobbin 126. In addition, the first yoke 122, the fixed core 120,
The second yoke 124 is made of a magnetic material. The movable iron core 106 is formed in a cylindrical shape, and the bobbin 1
It has a diameter that can be inserted into the inside of 26. A spring 130 is attached to the tip portion. A pilot valve (not shown) driven by the movable iron core 106 is provided in a part of the main body 108, and the electromagnetic coil 104 is provided.
A pilot type solenoid valve is formed together with the movable iron core 106.

Next, the procedure for assembling the pilot valve 100 will be described. First, a wire rod is wound around the bobbin 126 to form a coil winding 128, and the fixed core 120 is inserted from one end of the bobbin 126 to form the bobbin 126.
Is attached to the first yoke 122. Also, bobbin 126
The movable iron core 106 is inserted from the other end of the above, and the second yoke 124 is attached to the main body 108 in a state of being attached to both ends of the first yoke 122. Finally, the main body 108
A cover on the bottom plate 110, and a bolt 132 penetrates the bottom plate 110.
Screw it on. By tightening the bolt 132,
The electromagnetic coil 104 is sandwiched between the bottom plate 110 and the facing surface 114 of the main body 108 and fixed inside the main body 108.

The structure of the valve manifold 134 using the pilot valve 100 described above will be described. As shown in FIG. 4, the valve manifold 134 generally includes a plurality of manifold units 136, which are a pair of support blocks 1.
It is structured so as to be clamped from both sides by 38. An inflow port 140 is provided on the front wall surface of each support block 138, and an outflow port 142 is provided on the upper surface. The manifold unit 136 includes a valve 144 and a manifold 146. The valve 144 is formed by connecting the pilot valve 100 and the main valve 148 described above, and the manifold 146 is provided with two pipe joints 150. It should be noted that the lengths of the sides in the thickness direction A of the above-mentioned members constituting the manifold unit 136 are formed to have the same dimension, and the manifold unit 136 has a uniform thickness. In addition, the plurality of manifolds 146 are sandwiched by screws (not shown) that are laterally penetrated between the pair of support blocks 138, and the valve 144 is a screw provided on the surface of the manifold 146 on which the pipe joint 150 is projected. It is formed to be removable by loosening (not shown).

More specifically, a flow path (not shown) is formed inside each support block 138 to connect the inflow port 140 and the outflow port 142 to the manifold 146. A flow path (not shown) communicating with the manifold 146 is formed in the main valve 148.
Further, an insertion hole (not shown) communicating with the flow path is provided, and the inflow port 140 is moved in the insertion hole by moving in the axial direction.
A spool (not shown) for switching the fluid supplied from the above and supplying it to either one of the pipe joints 150 of the manifold 146 is inserted. In addition, the pilot valve 100
To communicate with the pilot valve and the main valve 148,
An operation flow path (not shown) for operating the spool in the main valve 148 is formed.

Due to this structure, the valve manifold 134
Flows in through the inflow port 140, and each manifold unit 13
The pilot type solenoid valve in the pilot valve 100 of each manifold unit 136 is controlled by the fluid supplied to 6 to move the spool in the axial direction.
It has a function of switching the flow path in 48 and supplying it to either one of the two pipe joints 150 formed in each manifold 146. Therefore, the pair of support blocks 138
By increasing the number of manifold units 136 sandwiched by, the fluid can be distributed to more places via the tube. The fluid discharged from each manifold unit 136 is discharged from the outlet 142. The flow rate that can be switched by the single manifold 136 is influenced by the diameter of the spool, that is, the thickness of the valve 144. The flow rate that can be switched can be increased by increasing the thickness, and the flow rate can be decreased by decreasing the flow rate.

[0008]

However, in the solenoid valve described above, the bolt for attaching the electromagnetic coil must be inserted in the main body in parallel with the moving direction of the movable iron core, so that the length of the side in the thickness direction is reduced. There is a problem that it needs to be long. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a solenoid valve having a short side length in the thickness direction.

[0009]

The present invention has the following constitution in order to achieve the above object. That is, the casing is formed in a rectangular parallelepiped whose length in the thickness direction is shorter than the length of each side of both sides, and the casing is built in the casing and arranged so that its axis is parallel to both sides of the casing. Solenoid valve that is installed in the casing and is movable in the axial direction of the electromagnetic coil and is driven by controlling energization to the electromagnetic coil. In the electromagnetic coil, between the electromagnetic coil and the casing and / or a mounting member fixed in the casing, from a direction perpendicular to the both side surfaces of the casing and orthogonal to the axial direction of the electromagnetic coil. It is characterized in that it is fixed to the casing by fixing means that is press-fitted or screwed.

[0010]

[Function] An electromagnetic coil arranged so that its axis is parallel to both sides of the casing is fixed in a casing formed in a rectangular parallelepiped whose length in the thickness direction is shorter than the length of each side of both sides. In doing so, the fixing means is press-fitted between the casing and / or the mounting member fixed in the casing and the electromagnetic coil from a direction perpendicular to both side surfaces of the casing and perpendicular to the axial direction of the electromagnetic coil, Or screw it in and fix it. Therefore, the length of the casing in the thickness direction can be shortened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. A pilot valve used in a valve manifold will be described as an example of the solenoid valve according to the present invention. The same components as those in the conventional example described above are designated by the same reference numerals, and the description thereof will be omitted. FIG. 1 is a perspective view showing a structure of a pilot valve as an embodiment of a solenoid valve according to the present invention,
(A) is an exploded perspective view of an essential part showing a structure of an electromagnetic coil,
(B) is a principal part exploded perspective view showing the structure of the casing. FIG. 2 is a perspective view showing a structure of a manifold alone using the pilot valve of FIG. 1, (a) is an exploded perspective view of a main part, and (b) is a perspective view after connection. Figure 3
[Fig. 3] is a partially cutaway side view showing the internal structure of the manifold alone in Fig. 2. FIG. 4 is a perspective view of a general valve manifold configured by using a plurality of manifolds alone. FIG. 5 is an explanatory diagram when a valve manifold is assembled using the manifold alone of FIG.

First, referring to FIG. 1, the pilot valve 10
The configuration of will be described. The pilot valve 10 has a casing 12 formed by using a resin material in a rectangular parallelepiped whose length in the thickness direction A is shorter than the length of each side on both sides.
And the electromagnetic coil 1 built in the casing 12 and arranged so that the axis B is parallel to both side surfaces of the casing 12.
04, and a movable iron core 106 that is built in the casing 12, is provided so as to be able to move back and forth in the direction of the axis B of the electromagnetic coil 104, and is driven by controlling the energization of the electromagnetic coil 104. Further, 14 is a control board, and the control board 14 is provided in the casing 12 and controls the current to the coil winding 128.

In more detail, the casing 12
A plate-shaped mounting member 18 for mounting the electromagnetic coil 104 is integrally formed on the main body portion 16. The mounting member 18 and the first side wall 20 of the main body portion 16 facing the mounting member 18 are integrally formed. A first through hole 22 is provided in each. In addition, the second wall surface 2 orthogonal to the first side wall 20.
The distance between the inner surfaces of the first and second yokes 122 and 124 is the same as the width of the first and second yokes 122 and 124. In addition, an engaging hole 28 that can be engaged with an engaging portion of a cover mounting pin described later is provided in the main body portion 16. In addition, at both ends of the U-shaped first yoke 122 mounted in the main body portion 16, at the positions corresponding to the first through holes 22, the second through holes having the same inner diameter as the first through holes 22 are provided. Through holes 30 are provided respectively. In addition, the bottom plate 32 is formed with a connector part 34 having a square outer shape integrally with the bottom plate 32.
When the pilot valve 10 is completely assembled, the connector 36 is provided with a terminal 36 formed in an L-angle protruding from the control board 14. Reference numeral 38 denotes a cylindrical pin as an example of a fixing means, the length of which is slightly shorter than the plate thickness of the first yoke 122 and the plate thickness of the main body portion 16, and the outer diameter of the first through hole 22 and It is formed so as to be press-fitted into the second through hole 30. A screw may be used as another example of the fixing means. At this time, the second through hole 30 provided in the first yoke 122 is formed as a screw hole. Reference numeral 40 denotes a cover, and a third through hole 42 corresponding to the engagement hole 28 of the main body portion 16 is provided on the upper surface thereof. Further, the control board 14 is provided with a fourth through hole 44 at a position corresponding to the third through hole 42. Reference numeral 46 denotes a cover mounting pin, and a first large diameter portion 48, a second large diameter portion 50, and an engaging portion 52 are formed from the pin head portion to the pin tip portion.

Next, the procedure for assembling the pilot valve 10 will be described. First, a wire is wound around the bobbin 126 to form a coil winding 128, and the fixed core 120 is inserted from one end of the bobbin 126 to mount the bobbin 126 on the first yoke 122. Further, the movable iron core 106 is inserted from the other end of the bobbin 126, and the second yoke 124 is attached to both ends of the first yoke 122 and attached to the main body 16. When the electromagnetic coil 104 is attached to the main body 16, the first through hole 22 and the second through hole 22 are attached.
The holes 30 are attached so that the positions of the through holes 30 are the same. Next, the pin 38 is press-fitted into the first through hole 22 from a direction perpendicular to the mounting member 18. As a result, the electromagnetic coil 104 is fixed in the casing 12. Subsequently, the control board 14 is arranged in the main body portion 16, the cover 40 is covered on the main body portion 16 from above the control board 14, and the cover mounting pin 46 is press-fitted into the third through hole 42 of the cover 40. This allows
Engaging portion 52 formed at the tip of the cover mounting pin 46
Engages with the engaging hole 28 of the body portion 16, the second large diameter portion 50 fixes the control board 14 to the body portion 16, and the first large diameter portion 48 engages with the cover 40. Then, the control board 14 and the cover 40 are fixed to the main body 16. Finally, the bottom plate 32 is fixed to the main body portion 16 and the cover 40 by means such as bonding so that the terminals 36 of the control board 14 are arranged in the connector portion 34, and the pilot valve 10 is completed.

Next, a procedure for assembling the valve 144 by connecting the main valve 148, the fixed cap 54 and the pilot valve 10 described above will be described. The outline of the structure of each member will be described with reference to FIGS. 2 and 3. The main valve 148 is formed in a rectangular parallelepiped shape using a resin material, and has a plurality of flow paths 56 inside and a spool for switching the flow paths 56. A mounting hole 60 for mounting 58 is formed. Further, a first engaging portion 64 having a through hole having a rectangular cross section is provided in a central portion on a surface connected to the pilot valve 10 in a protruding manner. Further, the mounting hole 60 is opened, and two screw holes 62 are provided on the surface to which the fixing cap 54 for closing the mounting hole 60 is mounted. In the pilot valve 10, a second engaging portion 66 that can be fitted into the through hole of the first engaging portion 64 is projectingly provided at one end portion of the surface that is connected to the main valve 148, and the other end thereof is provided. An engaging groove 68 is formed in the portion. Fixed cap 54
Is a rectangular parallelepiped made of a resin material, and one end of the connecting surface with the main valve 148 is engaged with the rear surface of the connecting surface of the main valve 148 with the pilot valve 10. A piece 70 is formed, and a second engagement piece 72 that engages with the engagement groove 68 of the pilot valve 10 is formed at the other end. Further, two through holes 74 are provided.

Next, the assembling procedure will be described. First, the second engaging portion 66 of the pilot valve 10 is fitted into the through hole of the first engaging portion 64 of the main valve 148 and the first engagement is performed. Engage the mating portion 64 and the third engaging portion 52,
The pilot valve 10 is brought into close contact with the main valve 148. Next, while engaging the second engaging piece 72 of the fixed cap 54 with the engaging groove 68 of the main valve 148, and further with the first engaging piece 70 with the back surface of the main valve 148, the fixing cap 54 Is brought into close contact with the main valve 148. Finally, the bolts 76 are inserted through the two through holes 74 of the fixed cap 54 to insert the screw holes 62 of the main valve 148.
The fixing cap 54 is fixed to the main valve 148 by screwing it into the main valve 148, and the pilot valve 10, the main valve 148 and the fixing cap 54 are connected.

Further, as shown in FIG. 2B, the assembled valve 106 is connected to a plurality of manifolds 146 which are previously held in parallel between the support blocks 138 to form a single manifold 136 (FIG. 2). 5).
As a result, the valve manifold 13 as shown in FIG.
4 is completed.

As described above, the pilot valve is easy to manufacture because the bolt is not required when the pin is used as the fixing means when the electromagnetic coil is mounted inside. Further, even if the fixing means is a pin or a screw, the length of the pilot valve and the side of the manifold alone in the thickness direction can be shortened, and the valve manifold can be miniaturized.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

[0020]

EFFECTS OF THE INVENTION When the solenoid valve according to the present invention is used, the axis of the casing is formed in a rectangular parallelepiped whose length in the thickness direction is shorter than the length of each side of both side surfaces. The electromagnetic coils arranged so as to be parallel to each other are perpendicular to both side surfaces of the casing and perpendicular to the axial direction of the electromagnetic coil between the casing and / or the mounting member fixed in the casing and the electromagnetic coil. Since it can be fixed by the fixing means that is pressed in or screwed in from the direction, the length of the casing in the thickness direction can be shortened. Therefore, the length of the casing in the thickness direction can be shortened, so that the solenoid valve can be made thinner.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a pilot valve as an embodiment of a solenoid valve according to the present invention,
(A) is an exploded perspective view of an essential part showing a structure of an electromagnetic coil,
(B) is a principal part exploded perspective view showing the structure of the casing.

FIG. 2 is a perspective view showing a structure of a manifold alone using the pilot valve of FIG. 1, (a) is an exploded perspective view of a main part, and (b) is a perspective view after connection.

FIG. 3 is a partially cutaway side view showing the internal structure of the manifold alone of FIG.

FIG. 4 is a perspective view of a general valve manifold configured by using a plurality of manifolds alone.

5 is an explanatory diagram when a valve manifold is assembled by using the single manifold shown in FIG. 2. FIG.

FIG. 6 is an exploded perspective view of essential parts showing the structure of a pilot valve as an example of a conventional solenoid valve.

[Explanation of symbols]

 12 casing 18 mounting member 38 pin 104 electromagnetic coil 106 movable core

Claims (1)

[Claims] 1. A casing formed in a rectangular parallelepiped whose length in the thickness direction is shorter than the length of each side of both side surfaces, and a casing incorporated in the casing and having its axis parallel to both side surfaces of the casing. An electromagnetic coil disposed in such a manner, and a movable iron core that is built in the casing, is movable in the axial direction of the electromagnetic coil, and is driven by controlling energization to the electromagnetic coil. In the solenoid valve described above, the electromagnetic coil is perpendicular to the both side surfaces of the casing and perpendicular to the axial direction of the electromagnetic coil between the electromagnetic coil and the casing and / or a mounting member fixed in the casing. Solenoid valve characterized in that it is fixed to the casing by fixing means that is press-fitted or screwed in from various directions.