JP2975281B2 - solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve for supplying and discharging a fluid.

[0002]

2. Description of the Related Art In recent years, a blood circulation promoting device has been widely known, in which compressed air is supplied to and exhausted from, for example, a jacket-shaped air bag worn on the body to expand and contract to repeatedly compress and relax the body, thereby promoting blood circulation. ing. In this blood circulation enhancer, the supply of compressed air to the air bag is gradually performed, the compression force is gradually increased, and when the pressure reaches a predetermined pressure value, the air is rapidly exhausted and relaxed to increase the blood circulation promotion effect. Because of the above requirement, this exhaust is performed using a quick exhaust valve. However, the quick exhaust valve is separate from a supply / exhaust valve for supplying / exhausting air, and both are connected by an A / E tube.

[0003] In addition, in a chair-type air massage machine which is widely used, a massage of a calf portion of a leg is recently performed by using a supply / exhaust valve and a rapid exhaust valve in the same manner as in the above-mentioned blood circulation promoter, and gradually supplies compressed air. In this chair type air massage machine, the supply / exhaust valve and the quick exhaust valve are separate, and both are connected by an air tube.

As described above, the solenoid valve which requires the supply / exhaust valve and the quick exhaust valve used in the blood circulation promoting device, the chair type air massage machine and the like is separate from each other. The number of parts such as the quick exhaust valve and the air tube for connecting the two parts increases, resulting in an increase in the number of assembling steps required for assembling these parts and an increase in cost due to an increase in the number of parts and the number of assembling steps. There is a problem that the supply and exhaust efficiency is reduced due to an increase in road resistance.

In order to facilitate understanding, a specific example in which a supply / exhaust valve and a quick exhaust valve are used separately will be described with reference to FIG. 5 for a conventional blood circulation enhancer. As shown in FIG. 5, reference numeral 51 denotes a supply / exhaust valve formed of an electromagnetic valve. The supply / exhaust valve 51 includes a housing 52 of a main body, an electromagnet 53 attached to one end of the housing 52, and a housing 52. It comprises a lid 54 attached to the other end. And the housing 5
2 is provided with a sleeve 55 formed in a cylindrical shape. Inside the sleeve 55, a cylindrical spool 56 which is movable in an airtight state in the axial direction is constantly urged in one direction by a spring S. A flow path 57 is formed at one end of the spool 56 between the outer periphery thereof and the inner wall of the sleeve 55. The housing 52 is provided with an inlet 58, a supply port 59, and an outlet 60, which are generally called ports, penetrating the inner peripheral wall of the sleeve 55. The inlet 58 is connected to an air tube 58a.
And the supply port 59 is connected to a quick exhaust valve 80 via an air tube 59a, and the quick exhaust valve 80 is worn on the body via an air tube 59b. Connected to an air bag 90 to be used.

The flow path 57 formed in the spool 56 closes the discharge port 60 when the intake port 58 communicates with the supply port 59, and closes the discharge port 60 when the supply port 59 communicates with the discharge port 60. It is formed so as to close the intake 58.

The quick exhaust valve has a housing 84 formed in a hollow cylindrical body having bottom walls 82 and 83 vertically opposed to each other as shown in a closed figure, and the inside of the housing 84 has both bottom walls. And a disc-shaped valve body 85 slidably disposed on the inner wall of the housing 84 in the direction
2 is formed with a connecting pipe 82a, which is connected to the air tube 59a, and is connected to the bottom wall 83a.
Is formed with a connecting pipe 83a and a plurality of exhaust holes 83b located around the connecting pipe 83a, and the air tube 59b is connected to the connecting pipe 83a. Further, the valve body 85 has a vent hole 85a formed at the center thereof,
The ventilation hole 85a is provided with a valve 85b made of an elastic member which normally closes the ventilation hole 85a and opens toward the bottom wall 83 when compressed air is supplied.

The electromagnet 53 comprises a coil 63 provided in a case 62 and a plunger 64 provided inside the coil 63. The plunger 64 is energized and cut off by energizing the coil 63. Spool 5
6 is moved in the sleeve 55 so that the intake port 58 and the supply port 59, and the supply port 59 and the
0 is alternately communicated to supply and exhaust fluid.

When the air bag 90 is inflated, the compressed air from the compressed air supply device 70 is supplied to the intake 58 of the supply / exhaust valve 51, the flow path 57, the supply port 59, the air tube 59a, and the quick exhaust valve 80. Air bag 9 through
When the pressure reaches a predetermined value, the supply / exhaust valve 51 is controlled, and the flow path 57 of the spool 56 connects the intake 59 and the exhaust 60. As a result, the supply of the compressed air is stopped, and at the same time, the air tube 59a or the air pressure becomes equal to the atmospheric pressure, and depending on the air pressure in the air bag 90, the valve 85b of the valve body 85 of the quick exhaust valve 80 closes the ventilation hole 85a. Moves to the bottom wall 82 side, the exhaust port 83b of the bottom wall 83 opens, and the air in the air bag is rapidly exhausted, and the pressing force applied to the body is almost instantaneously released to make the body relaxed.

[0010]

As described above, the supply / exhaust valve 51 and the quick exhaust valve 80 are conventionally provided separately and connected to each other by an air tube. Since the supply / exhaust valve 51, the air tube 59a, and the quick exhaust valve 80 are separated, the number of parts increases, and it is necessary to connect and attach each part at the time of assembly and to prevent air leakage from the increased number of connection points. As a result, the assembling work becomes complicated, which leads to an increase in the number of assembling steps and an increase in cost. In addition, there is a problem that the flow resistance due to the air tube 59a is increased, and the supply / exhaust efficiency is reduced.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a housing formed by connecting at least two divided cases to each other, and an inlet at one of the opposed chamber walls. On the other hand, a discharge port is formed so as to be opposed to each other, and has a supply port which is provided on the chamber wall so as to be separated from the intake port and the discharge port, and has a connection portion formed at an edge portion of the chamber wall. A path conversion chamber, a quick exhaust valve provided in the housing via the supply port and the communication path, and a valve body disposed in the flow path conversion chamber to open and close the inlet and the discharge port; According to another aspect of the present invention, there is provided an electromagnetic valve including an electromagnet provided in a housing and operating the valve body to selectively open and close the inlet and the outlet.

[0012]

According to the present invention, as described above, the supply / exhaust valve and the quick exhaust valve are integrally provided on the solenoid valve, so that the number of parts and the number of assembling steps can be reduced, and the resulting cost can be reduced. In addition, the supply / exhaust efficiency can be improved because the supply / exhaust flow path resistance can be reduced.

[0013]

1 to 4 show an embodiment of the present invention.
It will be described based on.

In FIG. 1, reference numeral 1 denotes an electromagnetic valve main body (hereinafter, simply referred to as a main body), 2 denotes a housing of the main body 1, and the housing 2 has two divided cases of an upper case 3 and a lower case 4. It is constituted by. The upper case 3 has a recess 5 formed in the center thereof, and a continuous rib 7 is formed to project from the center of the lower end surface of the outer peripheral wall 6 surrounding the recess 5. A concave portion 8 formed at the center of the lower case 4 so as to correspond to the concave portion 5 formed in the upper case 3.
A concave groove 10 formed to receive the rib 7 is formed at the center of the upper end surface of the outer peripheral wall 9 surrounding the concave portion 8. Then, after the packing 11 is attached to the concave groove 10, the lower case 4 and the upper case 3 are integrally connected to each other by a fixing tool such as a screw (not shown) with the concave portions 5 and 8 facing each other. The upper case 3 and the lower case 4 are integrally connected to each other, so that the recess 5 and the recess 8 form a flow path conversion chamber 12. When the two cases 4 and 5 are connected to each other, the rib 7 is pressed against the packing 11 to keep the flow path conversion chamber 12 and the outside airtight.

The compressed air supplied from a compressed air supply device such as an air compressor (not shown) is provided on the inner wall of the upper case 3, that is, the bottom wall 13 of the concave portion 5, which is one chamber wall of the flow path conversion chamber 12. Is formed. The upper outer wall 16 of the upper case 3 has a communication hole 17 a communicating with the inlet 14.
Is formed. The connection pipe 17 is connected to a compressed air supply device (not shown) by an air tube (not shown).

Next, in the lower case 4, the inner wall serving as the other chamber wall of the flow path conversion chamber 12 facing the bottom wall 13 of the upper case 3, that is, the bottom wall 19 of the concave portion 8, is provided with the inlet 1.
An outlet 20 for discharging the compressed air is formed opposite to the outlet 4. The bottom wall 19 is provided with a supply port 15 for supplying to a supply section formed of an air bag or the like. The supply port 15 communicates with one end of a communication path 18. Of the lower case 4 is bent in a direction perpendicular to the paper surface in the drawing,
The side is open. The communication passage 18 is formed on the side wall 4.
a.

An electromagnet storage chamber 21 is formed below the lower case 4 in the drawing, and an upper part of the electromagnet storage chamber 21 communicates with the discharge port 20 and a lower part of the opening 22 communicates with the outside air. Is provided. An electromagnet 23 is housed in the electromagnet storage chamber 21 by being attached to a side wall perpendicular to the plane of the drawing by screws 24. Also, the electromagnet 23 is stored in the electromagnet storage room 21.
Is stored, a gap G is formed between the left and right side walls of the electromagnet 23 and the inner wall of the electromagnet storage chamber 21 in the figure, and the gap G connects the discharge port 20 and the opening 22. A plunger 25 of the electromagnet 23 penetrates the outlet 20 and a valve 26 is attached to a tip end of the plunger 25. When the drive current is supplied to the electromagnet 23, it is attracted against the urging force of the coil spring 27 and moves downward in the drawing, and as a result, the valve element 26
Open the inlet 14 and close the outlet 20.

The valve body 26 is made of a soft elastic member such as rubber, and is formed at a flat columnar portion 26a as a columnar portion and at a lower portion of the columnar portion 26a, that is, at the discharge port 20 side. And a thin annular flange 26b that comes into contact with and separates from the bottom wall 19 around the edge of the outlet 20. The valve body 26 opens and closes the inlet 14 at the end face, that is, the upper surface of the columnar portion 26a, and opens and closes the outlet 20 by the annular flange 26b. The annular flange 26b that opens and closes the discharge port 20 is a soft elastic member and is formed to be thin, so that when compressed air compressed from an air compressor or the like flows into the flow path conversion chamber 12, Since the pressure of the compressed air is pressed against the chamber wall 19 around the rim of the outlet 20,
Leakage of compressed air from the outlet 20 can be reliably prevented.

A quick exhaust valve 30 is attached to the side wall 4a of the lower case 4 so as to communicate with the communication passage 18. As shown in FIG. 2, the quick exhaust valve 30 has a cylindrical wall 31 formed on the side wall 4a of the lower case 4 so as to surround the end side opening 18a of the communication passage 18, and an outer peripheral surface of the cylindrical wall 31. A case body 34 having a bottomed cylindrical shape having a large-diameter cylindrical wall 32 so as to form a gap between the cylindrical wall 32 and an upper bottom wall 33 at the top, and sliding inside the cylindrical wall 31 Vent hole 36a movably provided in the center
And a valve body 36 provided with a valve 36b provided so as to be normally closed. Then, the case body 34
A connection pipe 37 is formed at the center of the upper bottom wall 33, and a plurality of exhaust holes 38 are formed around the connection pipe.
In addition, a pair of mounting flanges 39a, 39a are provided on the edge of the cylindrical wall 32 of the case body 34.

A valve element 36 is disposed in the cylindrical wall 31 and a sealing packing 40 is interposed in a gap between the cylindrical wall 31 and the cylindrical wall 32 to mount the mounting flange 39a, 39a is screwed on the side wall 4a of the lower case 4.
1a, 41a to fix the quick exhaust valve 3
0 is assembled.

A connection portion 44 is provided around the supply port 15 by forming an annular groove 43 in the chamber wall 19 of the flow path conversion chamber 12. As shown in FIG. 3, the connection portion 44 connects the air tube 45 to the connection portion 44 before the main body 1 is completely assembled, that is, at least with the quick exhaust valve 30 attached to the lower case 4, and pressurizes compressed air. It is used to supply / exhaust and check whether or not the quick exhaust valve 30 operates normally. As described above, it is possible to confirm whether or not the operation of the quick exhaust valve 30 is normal before the main body 1 is completely assembled. Therefore, a malfunction of the quick exhaust valve 30 is found after the main body 1 is assembled, and it is possible to prevent a situation in which the main body 1 is disassembled and a new quick exhaust valve 30 is attached again, thereby improving the assembling efficiency. is there.

Next, the operation of the solenoid valve configured as described above will be described. First, when a drive current is supplied to the electromagnet 23, the plunger 25 is sucked and moved downward as shown in the figure, and the valve body 26 opens the inlet 14 and closes the outlet 20. As shown by arrows in the drawing, compressed air flows into the channel conversion chamber 12 from the inlet 14, and then the supply port 15 and the communication path 18.
Is supplied to the quick exhaust valve 30 via the When the compressed air flows into the quick exhaust valve 30, the valve body 36 moves toward the upper bottom wall 33 by the pressure of the compressed air, and the exhaust hole 38 is closed.
Then, the valve 36b opens the ventilation hole 36a, and the compressed air is supplied to the air bag, that is, the supply destination, via an air tube (not shown).

Next, when a predetermined amount of compressed air is supplied to the supply section and the air pressure reaches a predetermined value, the drive current of the electromagnet 23 is cut off, the suction of the plunger 25 is released, and the coil spring 27 applies the current. The valve 26 opens the outlet 20 and closes the inlet 14 as shown by a two-dot chain line in FIG. When the inflow of the compressed air from the inlet 14 is cut off and the outlet 20 is opened, the flow path conversion chamber 12 and the flow path 18 become equal to the atmospheric pressure, and the valve 36 b of the valve body 36 of the quick exhaust valve 30. Returns to the original state and closes the ventilation hole 36a, so that the valve body 36 moves away from the upper bottom wall 33, the exhaust hole 38 is released, and the compressed air in the supplied portion is rapidly exhausted from the exhaust hole 38. Is done. Then, the above-described supply / exhaust operation is repeated.

In the above embodiment, the connecting portion 44 is formed by forming the annular groove 43 around the supply port 15, but this forms the annular wall 46 around the supply port 15 as shown in FIG. By doing so, the connecting portion 47 may be formed.

[0025]

According to the present invention, since the supply / exhaust valve and the quick exhaust valve are integrally provided on the solenoid valve as described above, the number of parts and the number of assembling steps can be reduced, resulting in cost reduction. It is possible to achieve an effect that the supply / exhaust efficiency can be improved because the flow resistance of the supply / exhaust can be reduced. In addition, it is possible to easily confirm the operation of the quick exhaust valve before the completion of the assembly of the solenoid valve.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a solenoid valve according to an embodiment of the present invention.

FIG. 2 is a sectional view of a quick exhaust valve of the solenoid valve of the embodiment.

FIG. 3 is a sectional view showing an operation check of the quick exhaust valve of the solenoid valve of the embodiment.

FIG. 4 is a partial sectional view showing another embodiment of the connection part of the quick exhaust valve of the solenoid valve of the embodiment.

FIG. 5 is a partial cross-sectional view showing a configuration of a blood circulation enhancer using a conventional electromagnetic valve.

[Explanation of symbols]

 2 housing 12 flow path conversion chamber 13 room wall 19 room wall 14 intake 15 supply port 20 discharge port 23 electromagnet 26 valve body 26a columnar portion 26b annular flange portion 44 connection portion

Claims (1)

(57) [Claims] 1. A housing formed by connecting at least two divided cases to each other, an inlet formed on one of the opposing chamber walls, and a discharge port formed on the other with the discharge port facing the other. A flow path conversion chamber provided in the housing, having a supply port formed on the chamber wall and having a connection portion formed at an edge thereof, provided on the chamber wall; and A provided quick exhaust valve, a valve body disposed in the flow path conversion chamber for opening and closing the inlet and the outlet, and selecting the valve body provided in the housing from the inlet and the outlet. An electromagnetic valve comprising: an electromagnet that operates to open and close in a closed manner.