JPS63214586A - Passage switching valve - Google Patents

Abstract

PURPOSE:To obtain a valve with a simple structure and having no sliding portion and operating reliably by pinching an elastic pipe between an electromagnetic core and a magnetic body, controlling the polarities of the electromagnetic core, and repulsing or adsorbing the magnetic body to open or close a passage in the elastic pipe. CONSTITUTION:A movable electromagnetic core 52 changing the polarities of both ends in response to the direction of the current fed to a coil 51 is arranged between switching valves 23, 33. Permanent magnets 53, 54 are buried facing the movable electromagnetic core 52 on the outsides of the switching valves 23, 33. When the exciting direction of the coil 51 is changed and the upper end of the movable electromagnetic core 52 is set to an N pole and the lower end is set to an S pole, the movable core 52 is moved upward by the magnetic action with the permanent magnets 53, 54, the valve 23 is pressed and closed, and the valve 33 is opened. When the exciting direction is reversed, the valve 23 is opened, and the valve 33 is closed. Accordingly, a passage switching valve with a simple structure and having no sliding portion and reliable operating can be obtained.

Description

[Detailed description of the invention] "Technical field" The present invention relates to a flow path opening/closing valve.

"Prior art and its problems" For example, the simplest air cylinder device has one side of a piston as a pressure chamber, and a spring means that urges the piston to move in a direction against the pressure of the pressure chamber. It is composed of This air cylinder device uses a first on-off valve that controls supply of compressed air from a compressed air source to a pressure chamber, and a second on-off valve that controls discharge of compressed air from the pressure chamber. These two on-off valves are used in a manner such that when one is closed, the other is open. Conventionally, such on-off valves have been used that are functionally satisfactory depending on the spool valve, but
Spool valves have sliding parts and require high machining accuracy, resulting in the unavoidable problem of high costs.

``Object of the Invention'' Based on this awareness of the problem, the present invention aims to provide an inexpensive flow path opening/closing valve that has a simple structure, has no sliding parts, and operates reliably. shall be.

"Summary of the Invention" The present invention provides a pair of flow channels to be opened and closed in parallel, and in each of the pair of flow channels, an on-off valve made of a soft elastic body and having a lip for opening and closing the flow channel is disposed. At the same time, an electromagnetic core that can control the polarity at both ends is provided between the pair of on-off valves, and a magnetic core is provided on the outside of the pair of on-off valves, each magnetically cooperating with the electromagnetic core. It is characterized by the provision of a magnetic body that controls the opening and closing of the on-off valve.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. 1 to M6 show a first embodiment of the present invention. A valve body 10 has a pair of first flow passages 20 and second flow passages 30 bored in parallel. The first flow path 20 includes a compressed air source 21,
Injection channel 22 connecting to pressure chamber 41 of air cylinder device 40
The second flow path 30 is provided in a return flow path 32 that connects the same pressure chamber 41 and the discharge boat 31. The air cylinder device f40 defines a pressure chamber 41 by a piston 43 fitted in a cylinder 42, and the piston 43 is urged to move in a direction against the pressure inside the pressure chamber 41 by a compression spring 44. There is.

Opening/closing valves 23 and 33 made of soft elastic bodies are inserted into the first flow path 20 and the second flow path 30, respectively. This opening/closing valve 23.33 has substantially tapered flow path reduced diameter portions 24.25 and 34.35 on its left and right sides, respectively, and between the left and right reduced diameter portions is a lip 26.35 that opens and closes the flow path. 27 and lips 36.37. These lips 26.27 and 36.37 have slits 28.
38, and are installed in parallel with the pair of channels 20 and 30.

Since the on-off valve 23.33 is made of a soft elastic body, in a free state, the flow path diameter reduction portion 24.25 or the flow path diameter reduction portion 34.35
When the pressure of compressed air is applied to the lips 26 and 27 or the lips 36 and 37 open, compressed air flows.

In the illustrated example, the cross section of the on-off valve 23 (first flow path 20) is circular, and the cross section of the on-off valve 33 (second flow path 30) is square; however, this is due to the deformation of the cross section of the flow path. This is to show an example, not the purpose of asking these shapes.
The same applies to factors such as the material, wall thickness, and eccentricity of the slit of the on-off valves 23 and 33 themselves.

Behind this on-off valve 23 and on-off valve 33 is a solenoid 50.
is installed. This solenoid 50 has a coil 51
An electromagnetic core 52 is fitted in the center of the coil 51 so as to be movable in the axial direction.The movable electromagnetic core 52 moves as shown in FIGS. It changes the polarity at both ends and moves in the direction shown by the arrow in the figure.

On the other hand, this solenoid 5 is installed on the outside of the on-off valves 23 and 33.
Permanent magnets 53 and 54 located on both sides of o are embedded and fixed. As shown in the figure, the polarity of the permanent magnets 53 and 54 is such that they attract the polarity of the movable electromagnetic core 52 when moving close to it.

The main flow path opening/closing valve having the above configuration includes the coil 5 of the solenoid 50.
By changing the direction of energization to 1, on-off valves 23 and 3
3 can be opened and the other closed.

In other words, when the coil 51 is energized from one direction, polarity as shown in FIGS. 3 and 5 occurs at both ends of the movable electromagnetic core 52, which moves toward the on-off valve 23, and the movable electromagnetic core 52 is attracted to the permanent magnet 53. In order to
Press to the 6 side to open/close valve 231! close. At this time, the movable electromagnetic core 52 separates from the lip 36 of the on-off valve 33, so the on-off valve 33 opens due to fluid pressure.

On the other hand, when the direction of energization to the coil 51 is reversed, polarities as shown in FIGS. 4 and 6 occur at both ends of the movable electromagnetic core 52, and the movable electromagnetic core 52 moves toward the on-off valve 33 side. Therefore, since the movable electromagnetic core 52 attracts the permanent magnet 54, it presses the lip 368 toward the lip 37 side with a strong force to close the on-off valve 33. At this time, the movable electromagnetic core 52 separates from the lip 27 of the on-off valve 23, so the on-off valve 23 opens due to fluid pressure.

7 and 8 show another embodiment of the solenoid 50a. In this embodiment, the coil 51 is divided into two coils 51a, 511) divided in the axial direction of the movable electromagnetic core 52,
By selectively energizing one of them, it is possible to give the movable electromagnetic core 52 the polarity and movement shown in the figure without changing the direction of the current.

The ON and OFF states attached to the coils 51a and 51b in the figure, the polarity and moving direction of the movable electromagnetic core 52 are examples thereof. The opening and closing of the on-off valves 23 and 33 is the same as in the first embodiment.

Next, FIG. 9 and FIG. 10 show a third embodiment of the present invention.
is a fixed core, and on the outside of the on-off valve 23.33, there is a movable permanent magnet 55 that opens and closes the on-off valve 23.33 based on the polarity and spring force f of the fixed electromagnetic core 52a when energized.
．． The feature is that 56 is provided. Moving permanent magnet 55.5
The polarity at both ends of the moving permanent magnet 55 is different from the polarity at both ends of the fixed electromagnetic core 52a when the coil 51 is energized.
The movable permanent magnet 56 is set as shown in the figure so that it is attracted to the fixed electromagnetic core 52a, and the moving permanent magnet 56 is repelled by the fixed electromagnetic core 52a. The movable permanent magnet 55 is urged away from the lip 26 of the normally open/close valve 23 by the normally open spring 55a, and the movable permanent magnet 56 (by the normally closed spring 56a)
It is urged to move in the direction of pressing the lip 37 of the normally open/close valve 33.

This on-off valve operates as follows. When the coil 51 is de-energized, the movable permanent magnets 55 and 56 open the on-off valve 23 and close the on-off valve 33 by the forces of the normally open spring 55a and the normally closed spring 56a, respectively. On the other hand, when the coil 51 is energized, due to the polarity generated in the fixed electromagnetic core 52a,
The movable permanent magnet 55 is pulled toward the fixed electromagnetic core 52a against the force of the normally open spring 55a. As a result, lip 26
is pressed toward the fixed electromagnetic core 52a, and the on-off valve 23 is closed. At this time, the fixed electromagnetic core 52a and the movable permanent magnet 56 have opposing polarities, and the movable permanent magnet 56 moves in a direction away from the on-off valve 33 against the force of the normally closed spring 58a. Therefore, the on-off valve 33 is closed by fluid pressure.

``Effects of the Invention'' As described above, the flow path on-off valve of the present invention includes an electromagnetic core that is provided between the pair of on-off valves and can control the poles at both ends, and an electromagnetic core that can control the poles at both ends. Since the opening and closing of the pair of on-off valves is controlled by a magnetic body that magnetically cooperates with this electromagnetic core provided in the magnet core and controls the opening and closing of the on-off valve, the magnetic force can be used to control the opening and closing of the flow path. An on-off valve that can be opened and closed is obtained.

And even if the electromagnetic core or magnetic material moves,
Since the movement does not require a precise sliding structure like a spool valve, an on-off valve with a simple structure can be obtained.

[Brief explanation of the drawing]

1 to 6 show a first embodiment of the flow path opening/closing valve of the present invention, FIG. 1 is a longitudinal sectional view of the flow path opening/closing valve, and FIG.
The figure is the right side view of Figure 1, and Figures 3 and 4 are the ■ of Figure 1.
5 and 6 are cross-sectional views along line -■ in the operating state, and are diagrams showing the relationship between the polarity of the electromagnetic core and the polarity of the fixed electromagnet, which correspond to FIGS. 3 and 4, respectively. . 7 and 8 are diagrams showing the relationship between the polarity and movement direction of the electromagnetic core and the permanent magnet, showing a second embodiment of the present invention. 9 and 10 are a vertical sectional view and a polar diagram showing a third embodiment of the present invention. 10--Valve body, 20--First flow path, 21-Compressed air source, 22--Outgoing flow path, 23--Opening/closing valve, 24.25
-...Flow path reduced diameter part, 26.27-Lip, 28-Slit, 30-Second flow path, 31-Discharge port, 32-Return flow path, 33-Opening/closing valve, 34.35--・Flow path reduced diameter part, 3
6.37--lip, 38--slit, 40--second cylinder device, 41--pressure chamber, 42--cylinder,
43--piston, 44--compression spring, 50.50a
-Solenoid, 51.51a, 51b-': ]il, 5
2.52a-Electromagnetic core, 53.54--Permanent magnet (magnetic material), 55.56--Moving permanent magnet (magnetic material), 5
5a--normally open spring, 56a--normally closed spring. Q of ○ (') 0 -～~ 0's 4th figure 3rd figure 9th figure - 10th figure 'logo 54 figure 5 figure 7 mouth] 54 figure 6 figure 8

Claims (1)

[Claims] (1) A pair of flow channels to be opened and closed are arranged in parallel, and in each of the pair of flow channels, an on-off valve made of a soft elastic body and having a lip for opening and closing the flow channel is disposed, and this pair of flow channels is arranged in parallel. An electromagnetic core capable of controlling the polarity of both ends of the valve is provided between the valves, and further magnetically cooperates with the electromagnetic core on the outside of the pair of on-off valves to control the opening and closing of the on-off valve. A flow path opening/closing valve characterized by being provided with a magnetic material.