JP6866103B2 - Electromagnetic switching valve - Google Patents

Description

The present invention relates to an electromagnetic switching valve in which a valve body is operated by an electromagnet to switch and communicate between a plurality of flow paths.

In the conventional electromagnetic switching valve, a spool-shaped valve body is slidably inserted into the valve body in the axial direction, and one of the electromagnets provided on both sides of the valve body is energized and attracted to the fixed iron core. Press the valve body toward one switching position with, or press the valve body toward the other switching position with a movable iron core that is attracted to the fixed iron core by energizing the other electromagnet. The roads are switched and communicated (see, for example, Patent Document 1).

JP-A-2015-68459 (Fig. 1)

However, in the electromagnetic switching valve disclosed in Patent Document 1, when the stroke of the valve body is lengthened to increase the opening amount between the valve body and the flow path in order to increase the flow rate, the valve body has a flow path. The fluid force acting in the direction of closing the opening between the spaces becomes large, and an electromagnet that generates a large attractive force that overcomes this fluid force is required, resulting in an increase in power consumption.

An object of the present invention is to provide an electromagnetic switching valve capable of suppressing an increase in power consumption and increasing a flow rate.

In order to achieve such a problem, the present invention has taken the following measures. That is,
The valve body is slidably inserted into the valve body in the axial direction, and the side part of the valve body is equipped with an electromagnet that operates the valve body by energizing, and the valve body operates to switch between multiple flow paths through which fluid flows. In the communicating electromagnetic switching valve, the electromagnet is configured by connecting the second electromagnet part outward in the axial direction of the first electromagnet part adjacent to the valve body, and the first electromagnet part is the first by the attractive force generated by energization. The first fixed core that sucks the movable core is fixed to the side surface of the valve body, the first movable core is fitted to the tubular member so as to face the first fixed core and slidably in the axial direction, and the first movable core is fitted. The second fixed iron core engages with the valve body via a first pin member penetrating the first fixed iron core, and the second electromagnet portion attracts the second movable iron core by the attractive force generated by energization. 1 The movable iron core is fixed to the tubular member outward in the axial direction, the second movable iron core is fitted to the tubular member so as to be slidable in the axial direction facing the second fixed iron core, and the second movable iron core and the second movable iron core are fitted. 1 The movable iron core is engaged with the second pin member penetrating the second fixed iron core, and the first electromagnet part and the second electromagnet part are switched between a plurality of flow paths by a valve body with a large attractive force. It has a switching state for communicating, and a holding state for holding the switching state with a small suction force from switching state, a first electromagnet portion and the second electromagnet unit, a stroke for sucking a first movable iron core to the first fixed iron core It is an electromagnetic switching valve characterized in that the amount and the stroke amount for attracting the second movable iron core to the second fixed iron core are substantially the same.

In this case, the first electromagnet unit and the second electromagnet unit may energize both electromagnet units in the switching state and may energize any one electromagnet unit in the holding state. Further, the first electromagnet part and the second electromagnet part energize one of the electromagnet parts in the switching state, and de-energize one of the electromagnet parts energized in the switching state in the holding state. Either one of the electromagnets may be energized . Also, it may be energized said first electromagnet portion in the holding state.

As described in detail above, in the invention according to claim 1, the electromagnet is configured by continuously providing a second electromagnet portion outward in the axial direction of the first electromagnet portion adjacent to the valve body, and the first electromagnet portion is configured. The first fixed iron core that sucks the first movable iron core by the suction force generated by energization is fixed to the side surface of the valve body, and the first movable iron core faces the first fixed iron core and is slidable in the axial direction. The first movable iron core and the valve body are engaged with each other via a first pin member penetrating the first fixed iron core, and the second electromagnet portion is engaged with the second movable iron core by the attractive force generated by energization. The second fixed iron core for sucking is fixed to the tubular member on the outer side in the axial direction of the first movable iron core, and the second movable iron core is fitted into the tubular member so as to be slidable in the axial direction facing the second fixed iron core. The second movable iron core and the first movable iron core are engaged with each other via a second pin member penetrating the second fixed iron core, and the first electromagnet portion and the second electromagnet portion are valved with a large attractive force. It had a switching state in which switching and communication was performed between a plurality of flow paths depending on the body, and a holding state in which the switching state was held with a suction force smaller than that in the switching state. Therefore, in the holding state, the power is supplied with a smaller suction force than in the switching state, so that an increase in power consumption can be suppressed. Then, in the switching state, since the power is applied with a large suction force, the opening amount between the valve body and the flow path can be increased by overcoming the large fluid force, and the flow rate can be increased. Further, in the first electromagnet portion and the second electromagnet portion, the stroke amount for attracting the first movable iron core to the first fixed iron core and the stroke amount for attracting the second movable iron core to the second fixed iron core are substantially the same. Therefore, a large suction force can be obtained over the entire stroke.

Further, in the invention according to claim 2, the first electromagnet part and the second electromagnet part energize both electromagnet parts in the switching state and energize any one of the electromagnet parts in the holding state. Therefore, in the holding state, since any one of the electromagnets is energized, an increase in power consumption can be suppressed. Then, in the switching state, since both electromagnets are energized, a large attractive force can be obtained, the large fluid force can be overcome, the opening amount between the valve body and the flow path can be increased, and the flow rate can be increased. Can be increased.

Further, in the invention according to claim 3, the first electromagnet part and the second electromagnet part energize one of the electromagnet parts having a large attractive force in the switching state and energize in the switching state in the holding state. One of the electromagnets was de-energized and the other electromagnet with a smaller attractive force than the switching state was energized. Therefore, in the holding state, the electromagnet portion having an attractive force smaller than that in the switching state is energized, so that an increase in power consumption can be suppressed. Then, in the switching state, since the electromagnet portion having a large attractive force is energized, the opening amount between the valve body and the flow path can be increased by overcoming the large fluid force, and the flow rate can be increased.

Further, in the invention according to claim 4 , the first electromagnet portion is energized in the holding state. Therefore, since the second electromagnet portion is de-energized in the holding state, there is no problem even if the second movable iron core is disengaged from the first movable iron core via the second pin member, and it is appropriate depending on the application. The stroke amount can be shortened.

It is a vertical sectional view of the electromagnetic switching valve which showed one Embodiment of this invention. It is an electric circuit diagram of one Embodiment. It is a graph which showed the relationship between the attractive force, fluid force, spring force, power consumption of one embodiment and energization, de-energization of both electromagnets. It is a graph which showed the relationship between the attractive force, fluid force, spring force, power consumption of another embodiment and energization, de-energization of both electromagnets.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 1 denotes a valve body, which has a substantially rectangular parallelepiped shape and has a fitting / insertion hole 3 in which a spool-shaped valve body 2 is slidably fitted in the axial direction to be formed through the inside of the valve body. Female threaded portions are threaded on both ends of the fitting and insertion holes 3 opened on both side surfaces of 1. A supply flow path P for supplying a pressure fluid is opened at a substantially central portion in the axial direction of the fitting hole 3, and a fluid actuator (shown) has gaps on both sides in the axial direction at the connection point of the supply flow path P. The two load flow paths A and B connected to each other are opened, and the discharge flow paths R1 and R2 connected to the low pressure side with a gap outward in the axial direction of both load flow paths A and B, respectively. It is open. The valve body 2 is provided with land portions 2A and 2B, and is held in a neutral position by springs 4A and 4B accommodated at both ends of the fitting hole 3, and in the neutral position, the supply flow path P is cut off and the load flow path A is provided. The load flow path B is communicated with the discharge flow path R1 and the load flow path B is communicated with the discharge flow path R2. Further, in the valve body 2, at one of the switching positions shown in the upper half of FIG. 1 against the spring force of the spring 4A, the supply flow path P is switched and communicated with the load flow path A, and the load flow path B is discharged. Switching communication to R2. Further, the valve body 2 switches and communicates the supply flow path P with the load flow path B and the load flow path A with the discharge flow path at the other switching position shown in the lower half of FIG. 1 against the spring force of the spring 4B. Switching communication with R1.

5A and 5B are electromagnets provided on both sides of the valve body 1, and are composed of first electromagnet parts 6A and 6B and second electromagnet parts 7A and 7B.
Hereinafter, since the electromagnets 5A and 5B have the same configuration, the electromagnets 5A will be described as a representative, and the electromagnets 5B will be referred to and the description thereof will be omitted.
In the electromagnet 5A, the first electromagnet portion 6A is adjacent to the valve body 1, and the second electromagnet portion 7A is continuously provided outward in the axial direction of the first electromagnet portion 6A. In the first electromagnet portion 6A, the first fixed iron core 8A is screwed into the female screw portion of the fitting hole 3 to be fixed to the side surface of the valve body 1, and the first fixed iron core 8A is attracted by the attractive force generated by energization. The movable iron core 9A is fitted to the tubular member 10A so as to be slidable in the axial direction so as to face the first fixed iron core 8A. The tubular member 10A is fixed to the first fixed iron core 8A by welding. Reference numeral 11A is a first pin member, which penetrates the first fixed iron core 8A, engages the valve body 2 and the first movable iron core 9A, and is sucked into the first fixed iron core 8A by the first movable iron core 9A. Press. Further, the first electromagnet portion 6A has a coil bobbin 12A, a cylindrical yoke 13A, and a disk-shaped yoke 14A. The coil bobbin 12A is fitted onto the tubular member 10A on the radial outer side of the first fixed iron core 8A and the first movable iron core 9A, and the coil 15A is wound between the flanges at both ends in the axial direction. The coil bobbin 12A extends the flange portion on the valve body 1 side outward in the radial direction, and three connecting pins 16A, 17A, 18A (the connecting pins 17A and 18A are shown in FIG. 2) are provided in the extending portion. It protrudes in the axial direction toward the valve body 1 side. The two connection pins 16A and 17A are electrically connected to the coil 15A, and the connection pins 17A are common negative common terminals. The yoke 13A covers the outer circumference of the coil bobbin 12A, and a part of the valve body 1 side is cut out so that the extending portion of the coil bobbin 12A can extend outward in the radial direction. The yoke 14A is fitted on the tubular member 10A adjacent to the coil bobbin 12A and the yoke 13A on the outer side in the axial direction.

The second electromagnet portion 7A has substantially the same configuration as the first electromagnet portion 6A, and the second fixed iron core 19A is fixed to the tubular member 10A outward in the axial direction of the first movable iron core 9A, and the attractive force generated by energization causes the first. 2 The second movable iron core 20A sucked into the fixed iron core 19A is fitted to the tubular member 10A so as to be slidable in the axial direction facing the second fixed iron core 19A. 21A is a second pin member, which is a second movable iron core 20A that penetrates the second fixed iron core 19A, engages the first movable iron core 9A and the second movable iron core 20A, and is sucked into the second fixed iron core 19A. 1 The valve body 2 is pressed via the movable iron core 9A and the first pin member 11A. The stroke amount for sucking the second movable iron core 20A to the second fixed iron core 19A is substantially the same as the stroke amount for sucking the first movable iron core 9A to the first fixed iron core 8A.

The second electromagnet portion 7A has a coil bobbin 22A, a cylindrical yoke 23A, and a disk-shaped yoke 24A. The coil bobbin 22A is fitted onto the tubular member 10A on the outer side in the radial direction of the second fixed iron core 19A and the second movable iron core 20A, and the coil 25A is wound between the flanges at both ends in the axial direction. The coil bobbin 22A extends the flange portion on the valve body 1 side outward in the radial direction, and the extending portion has two connecting pins 26A and 27A (the connecting pins 27A are shown in FIG. 2) which are electrically connected to the coil 25A. ) Protrudes outward in the axial direction. The connection pin 26A is electrically connected to the connection pin 18A which is not electrically connected to the coil 15A of the first electromagnet portion 6A by the lead wire 28A. The connection pin 27A is electrically connected to the connection pin 17A electrically connected to the coil 15A of the first electromagnet portion 6A as a common minus common by a lead wire 29A (shown in FIG. 2). The yoke 23A covers the outer circumference of the coil bobbin 22A, and a part of the valve body 1 side is cut out so that the extending portion of the coil bobbin 22A can extend outward in the radial direction. The yoke 24A is fitted on the tubular member 10A adjacent to the coil bobbin 22A and the yoke 23A on the outer side in the axial direction.

The tubular member 10A has a lid member 30A fixed to an end portion on the outer side in the axial direction to close the opening. The lid member 30A is provided with a pressing pin member 31A that is manually pressed from the outside. The pressing pin member 31A is provided so that the valve body 2 can be pressed via the second movable iron core 20A, the second pin member 21A, the first movable iron core 9A, and the first pin member 11A. The first electromagnet part 6A and the second electromagnet part 7A are coil bobbins 12A, 22A, cylindrical yokes 13A, 23A, disc-shaped yokes 14A, 24A, coils 15A, 25A, connection pins 16A, 17A, 18A, 26A, 27A. , Lead wires 28A and 29A are integrally molded with a resin mold to form a coil block 32A. The coil block 32A is fitted onto the tubular member 10A, and is sandwiched between the coil block 32A and the valve body 1 by a nut 33A screwed into the lid member 30A.

Reference numeral 34 denotes a terminal box, which is placed and fixed on the valve body 1, and electromagnets 5A and 5B provided on both sides of the valve body 1 are electrically connected to an external power source (not shown). The terminal box 34 has an insertion portion 35A for inserting the connection pins 16A, 17A, 18A of the electromagnet 5A on one side, and inserts the connection pins 16B, 17B, 18B of the electromagnet 5B on the other side facing the one side. It has an insertion portion 35B to be inserted. The terminal box 34 is provided with a connector 39A that is electrically connected to the insertion portion 35A by the internal wirings 36A, 37A, and 38A on one side above the insertion portion 35A. Further, the terminal box 34 is provided with a connector 39B which is electrically connected to the insertion portion 35B by the internal wirings 36B, 37B, and 38B on the other side portion above the insertion portion 35B. The connectors 39A and 39B are detachably attached with electrical wiring from an external power source (not shown).

FIG. 3 shows the relationship between the attractive force K, K1, the fluid force F, the spring force S, S1, the power consumption W, W1 and the first electromagnet section 6A and the second electromagnet section 7A, with or without energization.
When the first electromagnet portion 6A and the second electromagnet portion 7A are energized at the same time, an attractive force K is generated. The suction force K is larger than the sum of the fluid force F and the spring force S of the spring 4B, and the valve body 2 is pressed toward the other switching position shown in the lower half of FIG. 1 to enter the switching state. In the switching state, power consumption W is generated.

Then, at the suction point E in FIG. 3 in which both the movable iron cores 9A and 20A of both electromagnet portions 6A and 7A abut on both fixed iron cores 8A and 19A, the second electromagnet portion 7A is de-energized and the first electromagnet portion 6A is energized. If this is continued, the holding state of holding the switching state is reached. In the holding state, the attractive force K1 is reduced to about half of the switching state by only the first electromagnet portion 6A, and becomes substantially constant. The spring force S1 of the spring 4B has a maximum value and is substantially constant. The suction force K1 is larger than the spring force S1 and continues in the holding state. The fluid force F does not occur and becomes zero because the valve body 2 has completed the switching between the flow paths. In the holding state, the second electromagnet portion 7A is de-energized, so that the power consumption W1 is about half that of the switching state.

Next, the operation of such a configuration will be described.
The upper half of the valve body 2 in FIG. 1 shows a holding state in which the valve body 2 is held in a switching state in which the valve body 2 is switched to one switching position, and the electromagnet 5B energizes the first electromagnet section 6B and the second electromagnet section 7B. The electromagnet 5A de-energizes both the first electromagnet portion 6A and the second electromagnet portion 7A, and the valve body 2 switches and communicates the supply flow path P to the load flow path A and discharges the load flow path B. Switching communication is connected to the road R2.

When the first electromagnet portion 6B of the electromagnet 5B is de-energized in this holding state, the valve body 2 is urged to the right in FIG. 1 by the spring force of the spring 4A to be in the neutral position and shuts off the supply flow path P. At the same time, the load flow path A is communicated with the discharge flow path R1 and the load flow path B is communicated with the discharge flow path R2.

When both the first electromagnet part 6A and the second electromagnet part 7A of the electromagnet 5A are energized in this neutral position, the valve body 2 has both movable iron cores 9A and 20A of both electromagnet parts 6A and 7A, and both fixed iron cores 8A and 19A. With the suction force sucked into the valve body 2, it is pressed to the right in FIG. 1 against the fluid force acting on the valve body 2 and the spring force of the spring 4B, and switches to the other switching position shown in the lower half of FIG. In the switching state, the supply flow path P is switched and communicated with the load flow path B, and the load flow path A is switched and communicated with the discharge flow path R1.

In this switching state, when the second electromagnet portion 7A of the electromagnet 5A is de-energized and the energization of the first electromagnet portion 6A is maintained, the valve body 2 has an attractive force in which the first movable iron core 9A is attracted to the first fixed iron core 8A. Then, the holding state is set to hold the switching state against the spring force of the spring 4B, and the other switching position shown in the lower half of FIG. 1 is held.

When the first electromagnet 6A of the electromagnet 5A is de-energized in this holding state, the valve body 2 is urged to the left in FIG. 1 by the spring force of the spring 4B to be in the neutral position.

By this operation, the electromagnets 5A and 5B are configured by connecting the second electromagnets 7A and 7B outward in the axial direction of the first electromagnets 6A and 6B adjacent to the valve body 1, and the first electromagnets 6A and 6B. Fixes the first fixed cores 8A and 8B that suck the first movable cores 9A and 9B with the suction force generated by energization to the side surface of the valve body 1, and the first movable cores 9A and 9B are the first fixed cores 8A and 8B. A first pin that is fitted to the tubular members 10A and 10B so as to be slidable in the axial direction and penetrates the first fixed cores 8A and 8B between the first movable cores 9A and 9B and the valve body 2. The second electromagnet portions 7A and 7B are engaged via the members 11A and 11B, and the second fixed iron cores 19 and 19B that attract the second movable iron cores 20A and 20B by the attractive force generated by energization are the first movable iron cores 9A and The second movable iron cores 20A and 20B are fixed to the tubular members 10A and 10B outward in the axial direction of 9B, and the second movable iron cores 20A and 20B are slidably slidable in the axial direction to the tubular members 10A and 10B facing the second fixed cores 19A and 19B. It is fitted and engaged between the second movable iron cores 20A and 20B and the first movable iron cores 9A and 9B via the second pin members 21A and 21B penetrating the second fixed iron cores 19A and 19B, and the first electromagnet. The parts 6A and 6B and the second electromagnet parts 7A and 7B have a large attractive force K, and a switching state in which the valve body 2 switches and communicates between a plurality of flow paths P, A, B, R1 and R2, and a suction smaller than the switching state. It had a holding state in which the switching state was held by the force K1. Therefore, in the holding state, the power is supplied with a suction force K1 smaller than that in the switching state, so that an increase in power consumption W1 can be suppressed. Then, in the switching state, since the power is supplied with a large suction force K, the opening amount between the valve body 2 and the flow paths P, A, B, R1 and R2 can be increased by overcoming the large fluid force F. The flow rate can be increased.

Further, the first electromagnet parts 6A and 6B and the second electromagnet parts 7A and 7B energize both electromagnet parts 6A, 6B and 7A and 7B in the switching state, and the first electromagnet parts 6A and 6B in the holding state. It was energized. Therefore, in the holding state, since the first electromagnet portions 6A and 6B are energized as any one of the electromagnet portions, an increase in power consumption W1 can be suppressed. Then, in the switching state, since both electromagnet portions 6A, 6B and 7A, 7B are energized, a large attractive force K can be obtained, and the valve body 2 and the flow path P, overcoming the large fluid force F, The amount of opening between A, B, R1 and R2 can be increased, and the flow rate can be increased.

Further, the first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B have a stroke amount for attracting the first movable iron cores 9A and 9B to the first fixed iron cores 8A and 8B and the second movable iron cores 20A and 20B. The stroke amount sucked into the second fixed iron cores 19A and 19B was made substantially the same. Therefore, a large suction force can be obtained over the entire stroke.

Further, the first electromagnet portions 6A and 6B were energized in the holding state. Therefore, since the second electromagnet portions 7A and 7B are de-energized in the holding state, the second movable iron cores 20A and 20B are disengaged from the first movable iron cores 9A and 9B via the second pin members 21A and 21B. However, there is no problem, and the stroke amount can be shortened as appropriate according to the application.

Further, the first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B have substantially the same configuration. Therefore, it is sufficient to prepare two electromagnet parts having substantially the same configuration, and it is possible to reduce the complexity of management as compared with the case where the electromagnet parts having different configurations are specially prepared.

FIG. 4 shows another embodiment of the present invention.
The first electromagnet parts 6A and 6B and the second electromagnet parts 7A and 7B have different configurations, and the attraction force K1 of the first electromagnet part is specified to obtain about half of the attraction force K of the second electromagnet parts 7A and 7B. As a result, the power consumption W1 of the first electromagnet units 6A and 6B becomes about half of the power consumption W of the second electromagnet units 7A and 7B. The spring 4B is the same as that of one embodiment, and the spring force S is obtained in the switching state, and the spring force S1 is obtained in the holding state, and the maximum value is substantially constant.
In the switching state, the second electromagnet units 7A and 7B are energized and the first electromagnet units 6A and 6B are de-energized. The large attractive force K of the second electromagnet portions 7A and 7B is larger than the sum of the fluid force F and the spring force S of the spring 4B, and switches and communicates between the plurality of flow paths P, A, B, R1 and R2.
In the holding state, the second electromagnet portions 7A and 7B are de-energized and the first electromagnet portions 6A and 6B are energized. The attractive force K1 of the first electromagnet portions 6A and 6B is about half of the switching state, and the holding state is continued by this small attractive force K1.

In the operation, the second electromagnets 7A and 7B are energized in the switching state to switch and communicate between the plurality of flow paths P, A, B, R1 and R2, and the first electromagnets 6A and 6B are energized in the holding state. Holds the switching state.
In this operation, substantially the same as in one embodiment, in the holding state, electricity is supplied with a suction force K1 smaller than that in the switching state, so that an increase in power consumption W1 can be suppressed. Then, in the switching state, since the power is supplied with a large suction force K, the opening amount between the valve body 2 and the flow paths P, A, B, R1 and R2 can be increased by overcoming the large fluid force F. The flow rate can be increased.

Further, the first electromagnet parts 6A and 6B and the second electromagnet parts 7A and 7B energize the second electromagnet parts 7A and 7B having a large attraction force K in the switching state, and the attraction force K1 smaller than that in the switching state in the holding state. The first electromagnet portions 6A and 6B of the above were energized. Therefore, in the holding state, the first electromagnets 6A and 6B having the attractive force K1 smaller than those in the switching state are energized, so that the increase in the power consumption W1 can be suppressed. Then, in the switching state, since the second electromagnet portions 7A and 7B having a large attractive force K are energized, the valve body 2 and the flow paths P, A, B, R1 and R2 overcome the large fluid force F. The amount of opening between them can be increased, and the flow rate can be increased.

Further, as in substantially the same manner as in one embodiment, since the first electromagnet portions 6A and 6B are energized in the holding state, the second electromagnet portions 7A and 7B are de-energized, and the second movable iron cores 20A and 20B are the second pin members 21A. There is no problem even if the engagement with the first movable iron cores 9A and 9B via the 21B is released, and the stroke amount can be appropriately shortened according to the application.

In each of the above-described embodiments, the three-position electromagnetic switching valve is provided with electromagnets 5A and 5B on both sides of the valve body 1, but the two-position electromagnetic with electromagnets 5A or 5B on any one side. It may be a switching valve. Further, although the first electromagnet portions 6A and 6B and the second electromagnet portions 7A and 7B have the connection pins 17A and 17B as common minus commons, they may be common plus commons. Further, the minus common of the electromagnet 5A and the minus common of the electromagnet 5B may be shared as one minus common. Further, although the terminal box 34 for electrically connecting the electromagnets 5A and 5B to an external power source (not shown) is placed and fixed on the valve body 1, DIN terminal boxes are provided on the electromagnets 5A and 5B, and the electromagnets 5A and 5B are provided. Of course, it may be electrically connected to an external power source with a lead wire.

1: Valve body 2: Valve body 5A, 5B: Electromagnet 6A, 6B: First electromagnet part 7A, 7B: Second electromagnet part 8A, 8B: First fixed iron core 9A, 9B: First movable iron core 10A, 10B: Cylinder Shaped members 11A, 11B: 1st pin member 19A, 19B: 2nd fixed core 20A, 20B: 2nd movable core 21A, 21B: 2nd pin member

Claims (4)

The valve body is slidably inserted into the valve body in the axial direction, and the side part of the valve body is equipped with an electromagnet that operates the valve body by energizing, and the valve body operates to switch between multiple flow paths through which fluid flows. In the communicating electromagnetic switching valve, the electromagnet is configured by connecting the second electromagnet part outward in the axial direction of the first electromagnet part adjacent to the valve body, and the first electromagnet part is the first by the attractive force generated by energization. The first fixed core that sucks the movable core is fixed to the side surface of the valve body, the first movable core is fitted to the tubular member so as to face the first fixed core and slidably in the axial direction, and the first movable core is fitted. The second fixed iron core engages with the valve body via a first pin member penetrating the first fixed iron core, and the second electromagnet portion attracts the second movable iron core by the attractive force generated by energization. 1 The movable iron core is fixed to the tubular member outward in the axial direction, the second movable iron core is fitted to the tubular member so as to be slidable in the axial direction facing the second fixed iron core, and the second movable iron core and the second movable iron core are fitted. 1 The movable iron core is engaged with the second pin member penetrating the second fixed iron core, and the first electromagnet part and the second electromagnet part are switched between a plurality of flow paths by a valve body with a large attractive force. It has a switching state for communicating, and a holding state for holding the switching state with a small suction force from switching state, a first electromagnet portion and the second electromagnet unit, a stroke for sucking a first movable iron core to the first fixed iron core An electromagnetic switching valve characterized in that the amount and the stroke amount for attracting the second movable iron core to the second fixed iron core are substantially the same. The first electromagnet unit and the second electromagnet unit are characterized in that both electromagnet units are energized in the switching state and any one electromagnet unit is energized in the holding state. Electromagnetic switching valve. The first electromagnet part and the second electromagnet part energize one of the electromagnet parts having a large attractive force in the switching state, and energize one of the electromagnet parts in the switching state in the holding state. The electromagnetic switching valve according to claim 1, wherein the electromagnet portion of any one of the attractive forces smaller than the switching state is energized as de-energized. The electromagnetic switching valve according to any one of claims 1 to 3 , wherein the first electromagnet portion is energized in the holding state.

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