JPS63190981A - Flow passage opening and closing valve - Google Patents

Abstract

PURPOSE:To secure the actuation of a valve without having any sliding part, by installing an armature, capable of contacting or separating to or from a lip of the opening and closing valve consisting of a soft elastic body, and closing a passage at time of pressure, in a shiftable manner. CONSTITUTION:Each of opening and closing valves 23 and 33, consisting of a soft elastic body, is inserted each into a first passage 20 and a second passage 30, while there are provided with almost taper-form passage contracted diametral parts 24, 25 and 34, 35 in both directions each, and in an interval between these symmetrical contracted diametral parts, also there are provided with lips 26, 27 and 36, 37 opening or closing these passages. And, a solenoid 50 is set up in space between these opening and closing valves 23 and 33, and the plunger 51 presses the lip 27 of the valve 23 or the lip 36 of the valve 33 in an alternative manner.

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 made up 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 that when one is closed, the other is open. Conventionally, such on-off valves 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 such an awareness of the problem, the present invention aims to provide an inexpensive flow path opening/closing valve that has a simple structure, does not have any sliding parts, operates reliably, and is operated reliably.

"Summary of the Invention" The present invention basically provides an on-off valve made of a soft elastic body, which has a lip for opening and closing the flow path, in a flow path to be opened and closed, and the lip of the on-off valve approaches and separates from the lip of the on-off valve. It is characterized by a movable armature that closes the flow path when pressed.

This channel opening/closing valve is a switching valve made of a soft elastic body, which has a pair of channels that are to be selectively opened and closed in parallel, and has a lip in the pair of channels that opens and closes the channels. By providing a movable armature between the pair of on-off valves that can selectively press the lip of both on-off valves and closing the flow path when pressed, one of the pair of flow paths can be closed. ,
It can be used as a channel opening/closing valve (switching valve) that opens the other channel. The armature can be composed of, for example, a solenoid plunger, and can control the moving direction of the piston of the air cylinder device by energizing or de-energizing the solenoid coil.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. 1 to 4 show an embodiment of the present invention, in which a pair of first passages 20 and second passages 30 are bored in a valve body 10 in parallel. The first flow path 20 is a flow path 2 that connects the compressed air source 21 and the pressure chamber 41 of the 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 port 31. The air cylinder device 40 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 lip 36, lip 37 yen! have. This lip 26
．． 27 and lips 36.37 are formed by inserting slits 28.38 in the flow path blockage,
A pair of channels 20.3o are installed in parallel.

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 lip 26, 27 or 36, 37 opens, and the 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 rectangular, but this is due to the deformation of the cross section of the flow path. This is to show an example, and is not intended to question 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.

A solenoid 50 is disposed between the on-off valves 23 and 33, and its plunger (armature) 51 is connected to the on-off valve 23.
27 or the lip 36 of the on-off valve 33. That is, the plunger 51 is movably provided in a moving hole 52 that communicates orthogonally with the first flow path 20 and the second flow path 30, and is normally moved in the direction in which the upper end of the figure presses the lip 278 by the compression spring 53. It is energized to move. On the other hand, when the coil 54 is energized, the plunger 51 is retracted against the force of the compression spring 53, and the lower end of the plunger 510 presses the lip 36 of the on-off valve 33. The on-off valves 23 and 33 each close the flow path when the lips 27, 36 are pressed with a force above a certain level.

Therefore, the main flow path opening/closing valve with the above configuration has the solenoid 50
When the coil 54 is de-energized, the plunger 51 rises and presses the lip 27, closing the flow path between the lips 27 and 26. Therefore, no compressed air is sent to the pressure chamber 41 of the air cylinder unit N40, and the piston 43 is at the return end due to the force of the compression spring 44. In this state, the coil 54
When energized, the plunger 51 is retracted, so that the pressing force on the lip 27 is released. Therefore lip 2
7 is opened by the force of compressed air from the compressed air source 21 as shown in FIG. 3, compressed air is sent to the pressure chamber 41, and the piston 43 moves. At this time, the lower end of the plunger 51 in the drawing presses the lip 36 of the on-off valve 33 to close the second flow path 30. In other words, the compressed air introduced into the pressure chamber 41 does not leak from the second flow path 30.

After moving the piston 43, when the coil 54 is de-energized, the plunger 51 closes the first flow path 20. Also, as the lower end of the brush jar 5 separates from the lip 36 of the on-off valve 33, the lip 36 opens as shown in FIG. to be discharged. Therefore, the piston 43 returns to the return end by the compression spring 44.

The above embodiment shows an example in which the present invention is applied to a flow path switching valve that closes one of a pair of flow paths and opens the other. This can also be applied to cases in which an on-off valve is provided and the valve is opened and closed by an armature that approaches and separates it from the lip.

Further, in the above embodiment, the plunger (armature) 51 is moved by the solenoid 5o, but the present invention does not limit the moving means.

Most simply, the plunger 51 can also be moved by a manual lever. Roughly speaking, by using two sets of flow path opening/closing valves of the above embodiments in combination, a control valve that controls the supply and discharge of compressed air to and from the pressure chambers on both sides of the piston can be constructed.

"Effects of the Invention" As described above, the flow path on-off valve of the present invention is provided with an on-off valve made of a soft elastic body and having a lip for opening and closing the flow path in the flow path to be opened and closed. The flow path opening/closing valve has a simple structure, no sliding parts, is inexpensive, and operates reliably because the flow path is closed by pressing the lip with an armature and opened by opening the lip. is obtained.

In particular, a simple flow path switching valve can be obtained by providing this on-off valve in a pair of flow paths to be selectively opened and closed, and by selectively pressing the lip of the valve by an armature.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the flow path opening/closing valve of the present invention;
2 is a right side view of FIG. 1, and FIGS. 3 and 4 are sectional views taken along the line DI-nl of FIG. 1 in different operating states. 10...Valve body, 20...-first flow path, 21...
・Compressed air source, 22... Outgoing flow path, 23... Open/close valve,
24.25... Channel diameter reduction part, 26.27... Lip, 28... Slit, 30... Second channel, 31...
・Discharge boat, 32... return flow path, 33... on-off valve,
34.35... Channel diameter reduction part, 36.37... Lip, 38... Slit, 40... Air cylinder device,
41-... Pressure chamber, 42... Cylinder, 43... Piston, 44... Compression spring, 50... Solenoid,
51--Plunger (amateur), 53--Compression spring, 54--Coil. Act 8

Claims (3)

[Claims] (1) An on-off valve made of a soft elastic body and having a lip for opening and closing the flow path is provided in the flow path to be opened and closed, and an armature that can come into contact with and separate from the lip of the on-off valve and closes the flow path when pressed is provided. A channel opening/closing valve characterized by being movably provided. (2) In claim 1, a pair of channels to be opened and closed are arranged in parallel, and each channel has a lip for opening and closing the channel, and is made of a soft elastic body. A channel opening/closing valve in which valves are respectively disposed, and an armature is movably provided between the pair of opening/closing valves so as to selectively press the lip of both opening/closing valves. (3) In claim 1 or 2, the armature is a flow path opening/closing valve comprising a solenoid plunger.