TWI524021B - Electromagnetic valve - Google Patents

Description

The electromagnetic valve

The present invention relates to a solenoid valve that utilizes a flow path for energizing an excitation coil to switch fluid.

In the past, the electromagnetic valve of the switchable fluid flow path is, for example, a solenoid valve described in Patent Document 1, which is configured such that the movable iron core is relatively moved by the energizing of the exciting coil, thereby switching the movable iron. The position of the core-connected valve body relative to the valve seat is used to switch the flow path of the fluid. The electromagnetic valve described in Patent Document 1 is configured such that the movable iron core moves along the guide shaft by the attraction force toward the fixed iron core. When the movable iron core moves along the guide shaft, a portion integrally extended from the movable iron core has a function as a guide portion for guiding the movement.

In addition, the electromagnetic valve described in Patent Document 2 is a solenoid valve in which the above-described guide portion and the movable iron core are integrated. In the electromagnetic valve described in Patent Document 2, the guide portion is formed of a resin material, and the arm portion extending from the guide portion covers the engagement groove of the movable iron core and is directly connected. The movable iron core is used to integrate the guide portion and the movable iron core. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-275811. [Patent Document 2] Japanese Laid-Open Patent Publication No. 2003-172472.

[Problems to be solved by the invention]

However, by energizing the exciting coil, the magnetic path acting on the magnetic force that attracts the movable iron core toward the fixed iron core is formed in the movable iron core outside the movable iron core. Therefore, in the electromagnetic valve described in Patent Document 2, the arm portion of the guide portion made of a resin material may be formed so as to be shielded from the outside of the movable iron core through the movable iron core. The doubts about the magnetic circuit. Further, in particular, in the connection portion between the guide portion and the movable iron core, loosening may occur, and further, it may be difficult to ensure the movement stroke of the movable iron core.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a solenoid valve which can secure a magnetic path and can ensure a moving stroke of a movable iron core. [Method for solving the problem]

A solenoid valve that solves the above-described problems includes a fixed iron core housed in a magnetic frame, and a movable iron core disposed coaxially with the fixed iron core, and the movable iron core pair is fixed by energizing the exciting coil The iron core is relatively moved, and the position of the valve body connected to the movable iron core with respect to the valve seat is switched, and the flow path of the fluid is switched; wherein the movable iron core is provided with a guiding portion formed of a resin material inside. For guiding the movement of the movable iron core, the guiding portion is integrally formed with the movable iron core so that the movable iron core cannot move relative to each other.

Further, in the solenoid valve of such a configuration, the guide portion has a protruding portion that protrudes from the movable iron core in the axial direction, and guides the movable iron via a slide of the protruding portion when the movable iron core moves. The movement of the core.

Further, the protruding portion protrudes from both sides in the axial direction from the movable iron core, and among the protruding portions, the first protruding portion that protrudes from the movable iron core toward the fixed iron core is inserted into the fixed iron core. Inserting a hole and guiding the movement of the movable iron core by sliding between the movable iron core and the fixed iron core, and the movable iron core is opposite to the first protruding portion among the protruding portions The second projecting portion that protrudes on the side is inserted into the insertion hole formed in the body in which the valve body is housed, and guides the movement of the movable iron core by sliding between the movable iron core and the body.

Further, in the solenoid valve having such a configuration, it is preferable that the movable iron core and the guide portion are integrally formed by insert molding.

Further, in the solenoid valve of such a configuration, preferably, the movable iron core and the guide portion are integrated via a stop rotation means for restricting the guide portion from opposing the movable iron core. Rotate. [Effects of the Invention]

According to the present invention, it is possible to secure the magnetic circuit and to secure the moving stroke of the movable iron core.

Hereinafter, an embodiment of the solenoid valve will be described.

As shown in Fig. 1, the solenoid valve is provided with a connector CN for supplying power through an external control unit. Further, the solenoid valve is composed of a valve portion 10 having a valve body 21 for switching a fluid flow path, and an electromagnetic portion 30 for moving the valve body 21.

First, the valve portion 10 will be described with reference to Figs. 1 and 2 .

The valve portion 10 is provided with a body 11 made of a non-magnetic material such as a resin material. A supply port P, an output port A, and a discharge port R are formed on the bottom surface (lower side in FIG. 1) of the body 11. The supply port P is a supply source connected to a fluid (for example, compressed air) via a pipe, and the output port A is connected to the fluid pressure device via a pipe. Further, a discharge pipe or the like is connected to the discharge port R.

Further, the main body 11 is formed with a first accommodating portion 12 which is formed in a circular shape on one side (right side in FIG. 1) orthogonal to the bottom surface, and a second accommodating portion 13 is formed. It is opened in a circular shape on the other side (the left side in FIG. 1) on the opposite side to the first housing portion 12. Each of the accommodating portions 12 and 13 is formed coaxially, and the partition wall 14 between the first accommodating portion 12 and the second accommodating portion 13 is formed with a guide passage 15 that communicates with the portions. On the partition wall, the guide passage 15 is formed to avoid the position corresponding to the discharge port R.

In the main body 11, the one side surface, that is, the opening side of the first housing portion 12 is a plug member 17 interposed therebetween via a sealing member 16 such as an O-ring, and is interposed between the partition wall 14 and the plug member 17. A valve chamber 18 is formed in the partition. Further, the valve chamber 18 is connected to the supply port P, the output port A, and the discharge port R, respectively.

In the valve chamber 18, the plug member 17 is formed with a plug protruding portion 19 projecting toward the inside of the valve chamber 18. An end surface of the plug portion 19 on the side of the valve chamber 18 is formed with a supply valve seat 19a which is a valve seat for switching the communication and non-communication between the valve chamber 18 and the supply port P, that is, as The function of the valve seat when the supply port P is connected to the output port A and is not connected is switched.

Further, in the valve chamber 18, a body protrusion 20 projecting toward the inside of the valve chamber 18 is formed in the partition wall 14, that is, on the body 11. A discharge valve seat 20a is formed on the end surface of the main body projecting portion 20 on the side of the valve chamber 18, which is a valve seat for switching the communication and non-communication between the valve chamber 18 and the discharge port R, that is, as a switch port. The function of the valve seat when R is connected to the output 埠A and is not connected.

In the valve chamber 18, the supply valve seat 19a and the discharge valve seat 20a are formed to face each other. In the valve chamber 18, between the supply valve seat 19a and the discharge valve seat 20a, a cylindrical valve body 21 that can be in contact with or separated from the supply valve seat 19a and the discharge valve seat 20a is housed. Further, in the valve chamber 18, a valve spring 22 such as a coil spring is housed between the plug member 17 and the valve body 21 for additional potential energy in the direction in which the valve body 21 is away from the supply valve seat 19a, that is, additional potential energy. On the side of the discharge valve seat 20a. Further, in the valve chamber 18, between the partition wall 14 and the valve body 21, a valve guide 23 that can support the valve body 21 and is integrally movable is housed.

The valve guide 23 has a cylindrical support portion 23a that supports the valve body 21 from the outer peripheral side, and a valve body guide portion 23b that guides the movement of the valve body 21. The valve body guide portion 23b is inserted into the guide passage 15 of the partition wall 14, and is formed to have a length such that its front end can be accommodated in the guide passage 15. Therefore, the movement of the contact and separation with respect to the supply valve seat 19a and the discharge valve seat 20a of the valve body 21 can be guided by sliding with the guide passage 15 of the valve body guide portion 23b.

As shown in the upper half of Fig. 1 and Fig. 2, in a state in which the valve body 21 is pressed against the supply valve seat 19a, the valve chamber 18 and the supply port P are disconnected (closed state). And the discharge port R is communicated with the output port A via the valve chamber 18 (open state).

On the other hand, as shown in the lower half of FIGS. 1 and 2, in a state where the valve body 21 is pressed against the discharge valve seat 20a, the valve chamber 18 and the discharge port R are disconnected ( In the locked state), the supply port P is communicated with the output port A via the valve chamber 18 (open state).

Next, the electromagnetic unit 30 will be described with reference to FIGS. 1 and 2 .

The electromagnetic portion 30 is provided with a magnetic frame 31 formed of a magnetic material. The magnetic frame 31 is fixed so as to cover the outer circumference of the section from the opening side of the second housing portion 13 in the main body 11 to the partition wall 14. A substantially cylindrical fixed iron core 32 formed of a magnetic material such as iron is fixed to the inner side of the magnetic frame 31. In the fixed iron core 32, an insertion hole 32a is recessed in the axial direction from the second housing portion 13 side of the main body 11 in the radial center.

Further, an excitation coil 34 wound around the outer circumference of the fixed iron core 32 via the insulating portion 33 is fixed to the inner side of the magnetic frame 31. In the insulating portion 33, the gap between the second housing portion 13 side and the main body 11 is sealed by a sealing member 35 such as an O-ring.

Further, inside the magnetic frame 31, in the second housing portion 13 of the main body 11, the movable iron core 36 is disposed on the same axis as the fixed iron core 32, and is separable from the fixed iron core 32. The way is contained. The movable iron core 36 is provided with a substantially cylindrical core portion 36a formed of a magnetic material such as iron. The core portion 36a is formed such that its inner diameter gradually decreases from the partition wall 14 of the body 11 toward the minimum inner diameter portion 36b, and the fixed core 32 is lifted from the minimum inner diameter portion 36b, and the inner diameter is kept constant once expanded . Further, the outer diameter of the core portion 36a is set to be slightly smaller than the inner diameter of the second housing portion 13, and is set to allow the movable iron core 36 to move in the second housing portion 13.

In the movable core 36, a guide portion 37 made of a non-magnetic material such as a resin material is integrally housed inside the core portion 36a, that is, in the radial direction inner side, and the core portion 36a. The guide portion 37 is formed by integrating the core portion 36a with the forged core portion 36a and then insert molding. By this insert molding, the minimum inner diameter portion 36b of the core portion 36a is fitted into the inner surface of the guide portion 37 to be integrated.

In particular, as shown in FIG. 2, a projection portion capable of moving and supporting the movable iron core 36 is formed in the guide portion 37, that is, a plurality of projections capable of guiding the movement of the movable iron core 36 are formed (in the present embodiment). There are a total of three) protruding portions 37a and 37b.

A pair of (two) valve body side protruding portions 37a are formed in the guide portion 37, and protrude from the movable iron core 36 toward the valve body 21 (valve guide 23) on the one end side in the axial direction. A pair of valve body side projections 37a are respectively inserted into the guide passages 15 as the insertion holes of the body 11, and are formed longer than the guide passages 15, respectively. In other words, when the movable iron core 36 moves relative to the fixed iron core 32 in relation to the contact separation, the valve body side protruding portion 37a slides in the guide passage 15. Further, the pair of valve body side protruding portions 37a are configured such that when the movable iron core 36 is closest to the fixed iron core 32, the valve body 21 is moved to a position attachable to the discharge valve seat 20a, and When the movable iron core 36 is farthest from the fixed iron core 32, the valve guide 23 is pressed to move the valve body 21 to a position attachable to the supply valve seat 19a. Thereby, the movable iron core 36 and the valve body 21 can be coupled via the pair of valve body side protrusions 37a and the valve guide 23. In the present embodiment, the pair of valve body side protruding portions 37a have the function as the second protruding portion.

Further, the guide portion 37 is formed with one fixed core side protruding portion 37b which protrudes from the movable iron core 36 on the side of the fixed iron core 32 on the other end side in the axial direction. The fixed core side protruding portion 37b is inserted into the insertion hole 32a of the fixed iron core 32, and when the movable iron core 36 is moved with respect to the contact separation with respect to the fixed iron core 32, it becomes slipped in the insertion hole 32a. . In the present embodiment, the fixed iron core side protruding portion 37b has a function as a first protruding portion.

Further, in the guide portion 37, a spring receiving portion 37c that spans the radial direction from the base portion protruding from the fixed core side protruding portion 37b is formed. Further, on the inner side of the magnetic frame 31, between the fixed iron core 32 and the spring receiving portion 37c of the guiding portion 37, a direction for attaching potential energy to the self-fixing iron core 32 away from the movable iron core 36 is also accommodated. That is, the plunger spring 38 such as a coil spring on the valve body 21 side.

Next, the outer shape of the movable iron core 36 will be described with reference to Figs. 1 to 3 .

In the guide portion 37 (the core portion 36a), the opening portion 37d on the valve body 21 side has an elliptical shape in which the opening diameter R1 is a long diameter (long axis) and the opening diameter R2 is a short diameter (short axis), and The portion of the guide portion 37 on the side of the valve body 21 is formed into an elliptical cross section as compared with the smallest inner diameter portion 36b of the core portion 36a. Therefore, the core portion 36a and the guide portion 37 are integrally formed so that the guide portion 37 cannot be rotated in the radial direction with respect to the core portion 36a. That is, the outer shape of the guide portion 37 and the inner peripheral shape of the core portion 36a have a function as a means for stopping the rotation, and the stop rotation means is for restricting the guide portion 37 toward the radial direction with respect to the core portion 36a. Rotate.

Further, the pair of valve body side projections 37a are formed in an arc shape along the curve drawn by the guide passage 15, respectively. On the other hand, the fixed iron core side protruding portion 37b is formed in a rod shape that protrudes from the opposite side of the pair of valve body side protruding portions 37a and is insertable into the insertion hole 32a.

Next, the function of the solenoid valve of the present embodiment configured as described above will be described.

As shown in the lower half of FIGS. 1 and 2, when energizing the exciting coil 34, the movable iron core 36 is adsorbed to the side of the fixed iron core 32 against the additional potential of the plunger spring 38, and the valve body 21 Then, the valve spring 22 is pressed to the discharge valve seat 20a by adding potential energy. At this time, the magnetic circuit X acting on the magnetic force that causes the movable iron core 36 to be attracted to the fixed iron core 32 is formed to pass through the magnetic core 31 and pass through the movable iron core 36 from the outer side of the movable iron core 36. (iron core portion 36a).

That is, since the guide portion 37 is provided on the inner side in the radial direction of the movable iron core 36, the guide portion 37 is not shielded: the magnetic body formed in the movable iron core 36 from the outer side of the movable iron core 36 Road X.

Since the shield is formed so as to pass through the magnetic path X in the movable core 36 from the outside of the movable core 36, the guide portion 37 can be formed of a resin material.

Further, since the movable iron core 36 and the guide portion 37 are integrally formed by insert molding, even when the core portion 36a and the guide portion 37 are formed of different materials, they can be integrated. The gap is formed without any gap therebetween, and the guide portion 37 is fitted with the minimum inner diameter portion 36b of the core portion 36a.

By such insert molding, relative movement in the axial direction or the radial direction of the core portion 36a can be prevented, and in particular, loosening of the joint portion between the core portion 36a and the guide portion 37 can be suppressed.

Further, between the upper half and the lower half of FIG. 1 and FIG. 2, the movement of the movable iron core 36 due to the switching of energization and stop energization of the exciting coil 34 is via the valve body side with the pair The protruding portion 37a is guided by sliding between the guide passages 15 and sliding of the fixed core side protruding portion 37b between the insertion holes 32a.

In other words, when the movable iron core 36 is moved, it is possible to move without moving the core portion 36a of the movable iron core 36 in the body 11.

Since the movable iron core 36 can be moved in this manner, the wear of the core portion 36a can be suppressed, and the selection range of the material for sliding the opposing members 37a, 37b of the guide portion 37 can be expanded. .

Further, between the upper half and the lower half of FIG. 1 and FIG. 2, the movement of the movable iron core 36 caused by the energization of the exciting coil 34 and the stop of the energization is performed by a pair of valves. The body side protruding portion 37a and the fixed core side protruding portion 37b are guided to both sides of the movable iron core 36 in the axial direction.

That is, when the movable iron core 36 is moved, the lateral suction force due to factors such as inclination with respect to the body 11 can be suppressed. Therefore, when the movable iron core 36 moves, it is possible to suppress the inclination of the movable iron core 36 due to the lateral suction force generated, and it is possible to suppress the occurrence of a movement stroke in which the movable iron core 36 cannot be secured.

As described above, according to the present embodiment, the effects described below can be obtained.

(1) Even if the guide portion 37 made of a resin material is integrated with the movable iron core 36, the magnetic path X can be secured and the moving stroke of the movable iron core 36 can be ensured.

(2) From the viewpoint of considering the movement of the movable iron core 36, it is not necessary to consider the sliding between the element having a higher hardness of the movable iron core 36 formed of iron or the like, thereby realizing a kind of In particular, the solenoid valve can be constructed with a material that can be used in accordance with the use or condition to form a solenoid valve with respect to the opposing members of the projections 37a and 37b of the guide portion 37 that slides.

(3) Since it is possible to suppress the lateral absorbing force when the movable iron core 36 moves, it is possible to suppress that the movement stroke of the movable iron core 36 cannot be ensured, and that the valve body 21 cannot be switched with respect to the respective valve seats 19a and 20a. The situation of the location.

(4) Even if the core portion 36a and the guide portion 37 are made of different materials, they can be integrated by insert molding so that there is no gap therebetween. Therefore, it is possible to suppress the occurrence of looseness between the core portion 36a and the guide portion 37.

(5) Even if the guide portion 37 is rotated in the radial direction with respect to the movable iron core 36, it can be further suppressed. Therefore, it is possible to further suppress an event that may have an influence on the loosening situation by the integration of the core portion 36a and the guide portion.

(6) When the movable iron core 36 moves, even if the plunger spring 38 expands and contracts, the guide portion 37 is not affected by the inclination of the movable iron core 36 due to the lateral suction force. Therefore, it is possible to suppress that the desired additional potential capability cannot be obtained due to the inclination of the plunger spring 38 or the like during the movement of the movable iron core 36.

(7) When the movable core 36 is moved, the core portion 36a of the movable core 36 can be moved without slipping in the body 11, so that the wear of the core portion 36a can be suppressed. Helps extend the life.

(8) Since the guide portion 37 is provided on the radially inner side of the movable iron core 36, the movable iron core can be made in comparison with the case where the guide portion 37 is provided on the radially outer side of the movable iron core 36. The suction area of 36 is further increased, and the attraction force for attracting the movable iron core 36 to the fixed iron core 32 can be further increased.

Further, the above-described embodiment can also be implemented in the form described below as appropriate.

The opening portion 37d may also be formed in a perfect circular shape. In this case, one or more convex portions may be formed on the periphery of the opening portion 37d so as to have a stop rotation for restricting the rotation of the guiding portion 37 in the radial direction of the core portion 36a. The function of the means. Further, such a means for stopping the rotation can also be achieved by locking with a screw or the like.

The core portion 36a and the guiding portion 37 may be fixed by being formed by different processes after being separately formed by different processes. Further, such an attachment means can also be achieved by locking with a screw or the like.

The core portion 36a and the guide portion 37 may be insert-molded, and the minimum inner diameter portion 36b may not have the inner surface of the insertion guide portion 37.

When the core portion 36a and the guide portion 37 are integrated, the recessed portion may be provided on the inner surface of the core portion 36a in order to embed the guide portion 37 in the core portion 36a.

In the above-described embodiment, the valve body side protruding portion 37a and the fixed core side protruding portion 37b are formed to guide the movement of the movable iron core 36. However, it may be guided by at least any protruding portion. mobile. For example, as shown in FIG. 4, when the movement of the movable iron core 36 is guided by only the valve body side protruding portion 37a, it is not necessary to set the fixed iron core side protruding portion 37b enough to be accommodated in the core portion 36a. The length is not required to form the insertion hole 32a of the fixed iron core 32. According to this example, the construction can be more simplified. Further, such a valve body side protruding portion 37a may be formed with one or three or more projections.

As long as the sufficient magnetic path X for sucking the movable iron core 36 to the fixed iron core 32 is ensured, the size of the core portion 36a of the movable iron core 36 can be reduced, and in particular, the length in the axial direction can be shortened. In other words, it can also contribute to miniaturization of the solenoid valve.

The length of the valve body guide portion 23b of the valve guide 23 may be set such that the tip end thereof protrudes from the guide passage 15 to the inside of the movable iron core 36, that is, the distance from the guide portion 37. Further, the valve body side guide portion for guiding the movement of the movable iron core 36 can be formed inside the guide portion 37 by inserting the valve body guide portion 23b.

In the insertion hole 32a of the fixed iron core 32, a rod-shaped projecting portion for replacing the fixed core side protruding portion 37b can be inserted and fixed, and the movable iron core 36 can be guided by inserting the protruding portion. The moving fixed core side guide portion is formed inside the guide portion 37.

In terms of fluid, it is not limited to a compressed gas, and may be a compressed liquid or the like, and other fluids.

The above embodiment can also be applied to a configuration in which the number of turns is two or four.

The above embodiment can also be applied to a solenoid valve that switches a flow path of a fluid, and the movable iron core 36 is separated from the fixed iron core 32 by energizing the exciting coil 34, thereby switching the movable iron core 36. The position of the connected valve body 21 with respect to each of the valve seats 19a, 20a.

10‧‧‧ Valve Department
11‧‧‧Ontology
12‧‧‧1st Containment Department
13‧‧‧2nd Department of Housing
14‧‧‧ partition wall
15‧‧‧Guided access
16‧‧‧ Sealing members
17‧‧‧Embedded pieces
18‧‧‧Valves
19‧‧ ‧ embolization protrusion
19a‧‧‧Supply valve seat
20‧‧‧ Body protrusion
20a‧‧‧discharge valve seat
21‧‧‧ valve body
22‧‧‧Valve spring
23‧‧‧Valve Guides
23a‧‧‧Cylindrical support
30‧‧‧Electromagnetic Department
31‧‧‧ Magnetic frame
32‧‧‧Fixed core
32a‧‧‧ insertion hole
33‧‧‧Insulation
34‧‧‧Exciting coil
35‧‧‧ Sealing members
36‧‧‧ movable iron core
36a‧‧‧ core
36b‧‧‧Minimum inner diameter
37‧‧‧Guide
37a‧‧‧ Body side projections
37b‧‧‧Fixed core side projections
37c‧‧·Spring bearing department
37d‧‧‧ openings
38‧‧‧Plunger spring
R1, R2‧‧‧ opening diameter
X‧‧‧ Magnetic Circuit

Fig. 1 is a cross-sectional view showing a height direction of a solenoid valve. Figure 2 is a cross-sectional view showing the width direction of the solenoid valve. Fig. 3 is a perspective view showing a movable iron core. Fig. 4 is a cross-sectional view showing the width direction of the solenoid valve in another example.

10‧‧‧ Valve Department

11‧‧‧Ontology

12‧‧‧1st Containment Department

13‧‧‧2nd Department of Housing

14‧‧‧ partition wall

15‧‧‧Guided access

16‧‧‧ Sealing members

17‧‧‧Embedded pieces

18‧‧‧Valves

19‧‧ ‧ embolization protrusion

19a‧‧‧Supply valve seat

20‧‧‧ Body protrusion

20a‧‧‧discharge valve seat

21‧‧‧ valve body

22‧‧‧Valve spring

23‧‧‧Valve Guides

23a‧‧‧Cylindrical support

30‧‧‧Electromagnetic Department

31‧‧‧ Magnetic frame

32‧‧‧Fixed core

32a‧‧‧ insertion hole

33‧‧‧Insulation

34‧‧‧Exciting coil

35‧‧‧ Sealing members

36‧‧‧ movable iron core

36a‧‧‧ core

36b‧‧‧Minimum inner diameter

37‧‧‧Guide

37a‧‧‧ Body side projections

37b‧‧‧Fixed core side projections

37c‧‧·Spring bearing department

37d‧‧‧ openings

38‧‧‧Plunger spring

R2‧‧‧ opening diameter

X‧‧‧ Magnetic Circuit

Claims (6)

A solenoid valve comprising: a movable iron core housed in a magnetic frame and disposed on a same axis as a fixed iron core, and moving the movable iron core relative to the fixed iron core by energizing the excitation coil By switching the position of the valve body connected to the movable iron core with respect to the valve seat and switching the flow path of the fluid, the inner side of the movable iron core is provided with a guide portion formed of a resin material, which is used for In order to guide the movement of the movable iron core, the guide portion is integrally formed with the movable iron core so that the movable iron core cannot move relative to each other. The electromagnetic valve according to claim 1, wherein the guide portion has a protruding portion that protrudes from the movable iron core in the axial direction, and when the movable iron core moves, it is guided by sliding of the protruding portion. The movement of the movable iron core. The solenoid valve according to claim 2, wherein the protruding portion protrudes from both sides of the movable iron core from the axial direction; and the first protruding portion of the protruding iron core protruding from the fixed iron core a part inserted into an insertion hole formed in the fixed iron core, and guiding the movement of the movable iron core via sliding with the fixed iron core when the movable iron core moves; The second protruding portion that protrudes from the movable iron core toward the side opposite to the first protruding portion is inserted into an insertion hole formed in the body in which the valve body is housed, and when the movable iron core moves The movement of the movable iron core is guided via sliding with the aforementioned body. The solenoid valve according to any one of claims 1 to 3, wherein the movable iron core and the guide portion are integrally formed by insert-molding. The solenoid valve according to any one of claims 1 to 3, wherein the movable iron core and the guiding portion are integrated via a stopping rotation means for restricting the pair of guiding portions The movable iron core is relatively rotated. The solenoid valve according to claim 4, wherein the movable iron core and the guiding portion are integrated via a stopping rotation means for restricting relative rotation of the movable iron core by the guiding portion.