JPH0571557U - Exhaust valve - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide an exhaust valve that can be easily connected to a pipe made of a flexible non-metallic material such as vinyl without changing the pipe direction. To do. [Structure] An exhaust valve 30 is provided with a first port 8 and a second port 10 linearly on a body 32, and both the ports 8 and 1 are provided.
The valve seat 36 and the lip packing 2 are provided in the hole communicating between the zeros.
2 is provided. The second port 10 is connected to the third port 14 via a rotatable L-shaped tube 43. The first
Ports 8 to 3 are one-touch type pipe fittings 3.
4 is forming. Therefore, a vinyl tube or the like can be easily attached and detached, and when connecting to the first port 8 and the second port 10, the connection can be made without changing the piping direction. Further, by rotating the L-shaped tube 43, the direction of the third port 14 can be changed so that the vinyl tube is not bent.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an exhaust valve capable of rapidly exhausting fluid in a cylinder or compressed air in a pneumatic tank, for example.

[0002]

[Prior Art]

 A conventional exhaust valve is shown in FIG. The exhaust valve 2 is composed of a first body 4 and a second body 6. The first body 4 is formed with first and second ports 8 and 10 each having a threaded portion, and a hole 12 communicates with both the ports 8 and 10. The second body 6 is formed with a third port 14 having a threaded portion, and the hole portion 16 of the tip end portion 18 communicates with the third port 14. At the bottom of the hole 12 of the first body 4, a lip packing 22 having a sleeve 20 is arranged and a second body 6 is fitted.

In the exhaust valve 2 configured as described above, when the fluid is supplied from the first port 8, the lip packing 22 is displaced rightward in the figure and seated on the tip portion 18 of the second body 6, The hole 16 of the second body 6 and the hole 12 of the first body 4 are blocked. Further, the fluid pressure from the first port 8 opens the sleeve 20 of the lip packing 22, and the fluid supplied from the first port 8 is supplied to the second port 10. On the other hand, when the fluid supply from the first port 8 is stopped and the fluid is supplied from the second port 10, the fluid pressure acts on the sleeve 20 of the lip packing 22, and the lip packing 22 is moved from the tip portion 18 to the tip end portion 18. Separate. Therefore, the fluid supplied from the second port 10 is supplied to the third port 14.

When the exhaust valve 2 configured as described above is provided in a pipe such as a cylinder, the first port 8 is connected to a fluid supply source, the second port 10 is connected to the cylinder, and the third port is connected. Open 14 to the atmosphere. With this connection, when the fluid is supplied to the cylinder, the fluid flows from the first port 8 to the second port 10, and when the fluid is discharged from the cylinder, the second port 10 to the third port 14. The fluid is discharged to the atmosphere via the.

By connecting the exhaust valve 2 in this way when piping to the cylinder, the effective cross-sectional area of the pipe is increased, and the piping distance to the exhaust is shortened to expedite the exhaust of the cylinder. The responsiveness can be improved. Also, since the piping distance leading to exhaust is shortened, the amount of water adhering that accompanies the operation of the cylinder will be reduced as much as possible.

[0006]

[Problems to be solved by the device]

 However, the second port 10 that communicates with equipment such as a cylinder and is used for both supply and discharge of the fluid is provided at a right angle to the first port 8 and is like a so-called L-shaped pipe. It is limited to piping. Therefore, there is a problem in that the pipe direction must be changed when connecting the exhaust valve 2 in the portion where the pipe is linearly connected. In addition, there is a disadvantage that the direction of piping for the third port 14 is also limited. Further, when the piping is made of a non-metallic material such as vinyl, it cannot be connected to the first port 8 to the third port 14 which are formed to be connected by screws, or the connection work is complicated. There's a problem.

The present invention has been made in order to solve this kind of problem, and does not need to change the direction of piping, and even for piping made of a flexible non-metallic material such as vinyl. It is an object to provide an exhaust valve that can be easily connected.

[0008]

[Means for Solving the Problems]

 To achieve the above object, the present invention has a first port to which a fluid is supplied and a second port that is provided substantially parallel to the axial direction of the first port and supplies the fluid to another device. By the main body part, the rotating part having the third port for discharging the fluid, and the fluid pressure supplied from the first port, the first port and the second port are communicated with each other, or the fluid pressure supplied from the second port is used. A switching valve for switching the second port and the third port so as to communicate with each other, and the rotating portion is configured by an L-shaped tube rotatably connected to the main body portion. To do.

Further, according to the present invention, the first to third ports are provided in a cylindrical hole portion forming each port, and a plurality of claw portions each of which is a cylindrical body and is bent with its tip end directed inward. A chuck member having an inner peripheral surface of the hole of the port for supporting the chuck member, and an inner peripheral surface of the chuck member abutting the inner peripheral surface of the chuck member. And a release bush arranged so that the tip end portion comes into contact with the claw portion which is bent in a directed manner.

[0010]

[Action]

 In the exhaust valve of the present invention, since the axial directions of the first port and the second port are substantially parallel to each other, it is possible to install them in the middle of straight piping without changing the piping direction. Further, since the rotating portion composed of the L-shaped pipe provided with the third port is configured to be rotatable with respect to the main body portion provided with the first port and the second port, the rotating portion is directed in the pipe direction. It can be rotated. Further, since the chuck member supported by the guide member is provided at the first to third ports, even if the pipe to the cylinder is a vinyl tube, for example, the claw portion of the chuck member is inserted into the tube. However, the tube can be prevented from being pulled out and connected to the port.

[0011]

【Example】

 The exhaust valve according to the present invention will be described below in detail with reference to the accompanying drawings by way of preferred embodiments.

First, an exhaust valve according to the present embodiment will be described with reference to FIG. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

The exhaust valve 30 has a cylindrical body 32 made of a resin body, and a first port 8, a second port 10, and a third port 14 each having a one-touch type pipe joint 34 described later, and the first port. 8 and the second port 10 are formed such that their axial directions substantially coincide with each other. In addition, making the axial directions of the both ports 8 and 10 substantially coincide means that the axial lines are made to be parallel, or the axial direction of the first port 8 is the second port 10 in addition to making the axial lines coincide. Including a slight angle with respect to the axial direction of. Further, a hole portion 35 that communicates with the first port 8 and the second port 10 at a right angle from the outer peripheral surface of the body 32 is provided in the substantially central portion of the body 32.

A valve seat 36 is provided at the center of the hole 35, and a connecting member 40 having a hole 38 therein is fitted to a protrusion formed on the outer peripheral surface of the body 32. Has been done. The tip end 42 of the connecting member 40 faces a passage connecting the first port 8 and the second port 10, and a lip packing 22 is arranged between the valve seat 36 and the tip end 42. Further, an L-shaped tube 43 which is rotatable in the axial direction of the hole 38 with an O-ring 41 interposed is provided in the enlarged portion of the hole 38 of the connecting member 40. The third port 14 is connected to the tip of the L-shaped tube 43.

The one-touch type pipe joint 34 is formed so that one end of a vinyl tube or the like for supplying fluid pressure from an external device (not shown) can be inserted. Specifically, the one-touch type pipe joint 34 has a release bush 44, and a guide member 46, a chuck member 48, and a seal member 50 are sequentially arranged outside the release bush 44.

A seal member 50 is installed on the bottom surface of the hole of the first port 8. The seal member 50 is a ring body, the inner peripheral surface of which is inclined at a constant angle.

The chuck member 48 is a ring-shaped elastic metal flat plate. The side surface of the chuck member 48 has a plurality of slits at equal intervals. The claw portion 52 is formed into a curved shape and bent inward.

The guide member 46 has a recessed portion that circulates, the recessed portion is fitted into the tip end portion of the body 32, and abuts against the side surface portion of the chuck member 48.

The release bush 44 is formed in a substantially cylindrical shape, and has an edge 54 formed at its tip end that abuts against the claw portion 52 of the chuck member 48 at the time of mounting, and has a slit (not shown) on its side surface. It is defined at intervals.

A meter-in circuit including the exhaust valves 30a and 30b according to the present embodiment will be described with reference to FIG. The exhaust valves 30a and 30b have the same configuration as the exhaust valve 30, and the constituent elements will be described with reference to FIG. The meter-in circuit is configured to switch the air from the compressed air supply source 62 by the switching valve 64 and supply the compressed air to the cylinder 60 via the exhaust valves 30a and 30b and the flow rate control valves 66a and 66b.

First, the tip of a vinyl tube or the like communicating with the switching valve 64 is inserted into the first port 8 of the exhaust valves 30a and 30b. After inserting the vinyl tube lightly after inserting it to the bottom of the hole of the first port 8, the claw portion 52 of the chuck member 48 of the one-touch type pipe joint 34 pierces the vinyl tube, Prevent withdrawal. Therefore, the vinyl tube and the first port 8 are surely connected. Similarly, the second port 10 is also connected to the vinyl tube communicating with the flow rate control valves 66a and 66b, and the third port 14 is also connected to the vinyl tube communicating with the exhaust port. In this case, since the L-shaped tube 43 is rotatable with respect to the connecting member 40, the third port 14 may be rotated in a direction in which the vinyl tube is not bent and connected to the vinyl tube.

After the above work, first, compressed air is supplied from the compressed air supply source 62 to the exhaust valve 30b via the switching valve 64. The compressed air that has flowed into the exhaust valve 30b from the first port 8 reaches the hole 35, displaces the lip packing 22 upward in the drawing, and abuts the tip 42 of the connecting member 40. Further, pressure is applied to the lip packing 22 from the compressed air to open the sleeve 20 so that the first port 8 and the second port 10 communicate with each other. As a result, compressed air is supplied from the exhaust valve 30b to the cylinder 60 via the flow rate control valve 66b. Due to the displacement of the piston of the cylinder 60, the air from the other chamber reaches the second port 10 1 of the exhaust valve 30a via the flow control valve 66a. In the exhaust valve 30a, the lip packing 22 is displaced downward in the drawing by the pressure of the air reaching the second port 10, and is seated on the valve seat 36 to shut off the second port 10 and the first port 8. Since the lip packing 22 is separated from the tip portion 42 of the connecting member 40, the second port 10 and the hole portion 38 of the connecting member 40 communicate with each other. Therefore, the air that has reached the second port 10 is discharged to the outside through the hole 38, the L-shaped tube 43, and the third port 14 through the exhaust port.

In the exhaust valve according to the present embodiment, since the first port 8 and the second port 10 are formed in a substantially straight line, they can be connected without changing the piping direction even if they are incorporated in the middle of the piping. Further, since the L-shaped pipe 43 is fitted to the body 32 so as to be rotatable in the direction perpendicular to the body 32 and the third port 14 is provided at the tip of the L-shaped pipe 43, the third port 14 is connected to the L-shaped pipe 43. It can be connected to the third port 14 so that the vinyl tube is not bent by being rotated through. Further, in the fluid circuit to the cylinder 60, the exhaust valves 30a and 30b are provided in front of the switching valve 64 to substantially shorten the piping distance to the exhaust of the cylinder 60, so that the displacement of the piston of the cylinder 60 is reduced. By doing so, it is possible to reduce the amount of water that is generated during piping and the amount of water that adheres to the inside of the pipe. Further, when the amount of water adhering to the inside of a non-metallic pipe such as a vinyl tube becomes large, the tube or the like is cut midway, and the exhaust valve 30 is cut by the one-touch fitting 34. It is possible to reduce the generation of water by interposing on the inside.

A fluid supply source such as a compressed air supply source 62 is connected to each of the first port 8 and the third port 14 of the exhaust valve 30 so that the fluid is supplied from the second port 10 to another device. It is also possible to use the exhaust valve 30 as a shuttle valve that supplies fluid to the second port 10 from the higher pressure side of the first port 8 or the third port 14 by connecting to the exhaust port 30.

[0025]

[Effect of the device]

 According to the exhaust valve of the present invention, the following effects can be obtained.

That is, since the first port and the second port are provided substantially parallel to each other, it is possible to install them in the middle of the pipe without changing the pipe direction. In addition, since the rotating part consisting of the L-shaped pipe provided with the third port is configured to be rotatable with respect to the main body part provided with the first port and the second port, the rotating part is rotated in the direction of the piping. By doing so, the direction of the third port can be suitably changed. Further, since chuck members supported by the guide members are provided at the first to third ports, for example, in the case of piping using a vinyl tube, a part of the vinyl tube or the like is cut and the portion is cut. The tube is locked by the claw portion of the chuck member by simply inserting the tube into the exhaust valve, and connection can be easily performed. Furthermore, by incorporating the exhaust valve into the fluid circuit to the cylinder in this way, it is possible to shorten the piping distance to the exhaust and reduce the amount of water adhering to the inside of the piping.

[Submission date] November 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

[0005] Upon pipe to the cylinder, by connecting the exhaust valve 2 in this way, to shorten the piping distance to exhaust, performed quickly exhaust, it is possible to improve the responsiveness of the cylinder. Further, since the pipe distance leading to exhaust is shortened, the amount of water adhering to the cylinder that is generated by the operation of the cylinder is reduced as much as possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an exhaust valve according to the present invention.

FIG. 2 is a meter-in circuit diagram of a cylinder incorporating an exhaust valve according to the present invention.

FIG. 3 is a vertical cross-sectional view of an exhaust valve according to a conventional example.

[Explanation of symbols]

 2, 30, 30a, 30b ... Exhaust valve 8 ... First port 10 ... Second port 14 ... Third port 22 ... Lip packing 32 ... Body 43 ... L-shaped tube 44 ... Release bush 48 ... Chuck member 52 ... Claw portion

Claims (2)

[Scope of utility model registration request] 1. A body part having a first port to which a fluid is supplied and a second port which is provided substantially parallel to an axial direction of the first port and supplies the fluid to another device, and a body to discharge the fluid The rotating portion having the third port and the fluid pressure supplied from the first port communicate the first port and the second port, or the fluid pressure supplied from the second port causes the second port and the third port. An exhaust valve, wherein the rotating portion is composed of an L-shaped pipe rotatably connected to the main body portion. 2. The exhaust valve according to claim 1, wherein each of the first to third ports is bent inside a cylindrical hole portion forming the port, and a tip end of the cylindrical body is directed inward. A chuck member having a plurality of claw portions, a guide member provided on the inner peripheral surface of the hole portion of the port to support the chuck member, and the chuck member contacting the inner peripheral surface of the chuck member. An exhaust valve, comprising: a release bush arranged such that a tip end portion thereof comes into contact with a claw portion bent toward the inside of the member.