JPS6032473Y2 - pipe fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe joint in which a plug is removably connected to a cylindrical body by operating a sleeve and using a lock ball provided on the cylindrical body.

Conventionally, in this type of pipe joint, when a plug is attached to or removed from the cylindrical body, the sleeve is usually manually operated to release the locked state by the lock ball provided on the cylindrical body. When removing the plug from the cylinder when the inside of the pipe is in a vacuum state, even if you operate the sleeve to release the lock by the lock ball, the plug remains strongly attracted to the cylinder, and the cylinder It takes a lot of force to remove the plug from the body, making it difficult.

In view of the above-mentioned points, the present invention provides a pipe joint that can be easily removed without requiring any human effort at least in the work of removing the plug from the cylinder, and furthermore, allows the work of removing the plug from the cylinder to be performed by remote control. Its gist is that it consists of an outer cylinder, a middle cylinder, and an inner cylinder whose positions do not change with each other,
The inner cylinder is equipped with a lock ball that removably connects the inserted plug, and a lock ball holding sleeve, and between the outer cylinder and the middle cylinder, the lock ball holding sleeve of the lock ball holding sleeve is released. The sleeve operating tube is installed in an axially movable and airtight manner, and a plug extrusion tube that pushes out the inserted plug is installed between the middle tube and the inner tube in an axially movable and airtight manner. Furthermore, the outer cylinder is provided with an air inlet for blowing compressed air for moving the sleeve operating cylinder toward the lock ball holding sleeve and moving the plug pushing cylinder toward the plug.

An embodiment of the present invention will be described in detail below with reference to the drawings.

The present invention consists of an outer tube 1, a middle tube 2, and an inner tube 3 whose positions do not change with each other, and the outer tube 1, middle tube 2, and inner tube 3 constitute a pipe joint body 4.

In the middle cylinder 2, one end serves as an insertion opening 6 for the plug 5, and small taper holes 7 are formed in the circumferential direction at appropriate intervals on the outer periphery of the tip on the side of the plug insertion opening 6, and each of these holes - Loosely fit the lock ball 8 into the tapered small hole 7 so that a part of it protrudes from the tapered small hole 7 into the middle cylinder 2, and then place it on the outer periphery of the tip of the middle cylinder 2 inside the outer cylinder 1. A lock ball holding sleeve 10 having a lock ball holding part 9 on the inner surface is attached so as to be movable in the axial direction. energized.

The inner cylinder 3 has an adapter part 12 at the end opposite to the plug insertion opening 6 of the middle cylinder 2, and has a valve mechanism 13 built therein.

Between the outer cylinder 1 and the inner cylinder 2, a sleeve operating cylinder 14 for pressing the lock ball holding sleeve 10 and releasing the lock ball holding is installed axially freely and airtightly, and the sleeve operating cylinder 14 is airtightly mounted. The end portion on the side of the lock ball holding sleeve 10 is brought into contact with the lock ball holding sleeve 10, and serves as a pressing part 15 that moves the sleeve 10 in a direction to release the holding of the lock ball 8.

This sleeve operating cylinder 14 is always urged in the opposite direction with respect to the lock ball holding sleeve 10 by a spring 16.

Further, between the middle cylinder 2 and the inner cylinder 3, there is a plug extrusion cylinder 1 for pushing out the plug 5 inserted into the plug insertion opening 6 of the middle cylinder 2.
7 in an axially freely and airtight manner, and the plug extrusion tube 17
The end facing the plug 5 is defined as a plug extrusion part 18.

This plug extrusion cylinder 17 is urged in the opposite direction to the plug insertion opening 6 by a spring 19.

Further, the sleeve operating cylinder 14 is moved in the outer cylinder 1 in the direction of the lock ball holding sleeve 10, that is, in the direction of releasing the holding of the lock ball 8, and the plug pushing cylinder 17 is moved in the direction of the plug 5, that is, in the direction of releasing the holding of the lock ball 8. A blow-in port 20 is formed for blowing compressed air for moving in the extrusion direction to the outside.

The compressed air blown from the air inlet 20 is sent to the end a of the sleeve operation cylinder 14 opposite to the pressing part 15 through a compressed air guide groove 21 formed on the outer periphery of the middle cylinder 2, and is sent to the end a of the sleeve operation cylinder 14 opposite to the pressing part 15. The extrusion tube 17 is fed to the end opposite to the extrusion section 18.

Reference numeral 22 denotes an auxiliary groove formed in the circumferential direction on the outer periphery of the middle cylinder 2 so as to intersect with the guide groove 21. Even if the compressed air guide groove 21 does not match up with the compressed air guide groove 21, the auxiliary groove 22 formed in the circumferential direction and the air inlet 20 can be made to match with each other at any rotational position, so that the compressed air guide groove 21 can be reliably aligned with the compressed air guide groove 21. It is designed to send compressed air.

Reference numeral 23 designates an operating tube for the lock ball holding sleeve 10 made of an inward flange tube, and this operating tube 23 is inserted between the lock ball holding sleeve 10 and the outer tube 1 from the plug insertion opening 6 side of the middle tube 2. It fits freely in the axial direction between them.

The spring 11 that springs in the axial direction is provided between the lock ball holding sleeve 10 and the operating barrel 23, and the operating barrel 23 has a snap ring to prevent the lock ball holding sleeve 10 from coming off. 24 are provided.

Also, the operation tube 23 is connected to the plug insertion port 6 by the spring 25.
A protrusion 26 is formed on the outer periphery of the operation tube 23, and this protrusion 26 is engaged with a stop ring 27 provided at the end of the outer tube 1, so that the operation tube 23 is biased outwardly. In addition, the inner hole 29 of the flange of the inward flange pipe forming the operating cylinder 23 has a larger diameter than the plug insertion opening 6 of the middle cylinder 2, and allows the insertion part 28 of the plug 5 to freely pass through. The plug 5 is formed to have a diameter that can be adjusted, and its flange surface serves as a pressing receiving portion 31 that comes into contact with a pressing portion 30 formed on the plug 5.

32 is a fixing body 33 that integrally fixes the outer cylinder 1 and the inner cylinder 3.
34 is a seal ring, 34 is a valve of the valve mechanism built into the inner cylinder 3, 35 is a backing of the valve 34, 36 is a spring, and 37 is an engagement groove for engaging the lock ball 8 formed in the insertion portion 28 of the plug 5. , 38 are valves built into the plug 5.

Next, the operation of the present invention will be explained.

The locking ball holding sleeve 10 attached to the outer periphery of the plug insertion hole 6 of the middle cylinder 2 is moved toward the outside of the plug insertion hole 6 by the movement of the operating tube 23 toward the outside of the plug insertion hole 6 due to the spring 25. The lock ball holding part 9 is removed from the lock ball 8, that is, from above the tapered small hole 7 of the middle cylinder 2, and the lock ball 8 is in a state of play, and the plug insertion port 6 of the middle cylinder 2 in this state is When the insertion part 28 of the plug 5 is inserted, first, the insertion part 28 of the plug 5 pushes out the lock ball 8, which partially protrudes inside the middle cylinder 2, toward the outer circumference of the middle cylinder 2.

On the other hand, the pressing part 30 formed on the plug 5 contacts the pressing receiving part 31 of the operation cylinder 23, and moves this in the direction opposite to the plug insertion hole 6 against the spring force of the spring 25.

Due to this movement of the operation tube 23, the lock ball holding sleeve 10 is pushed via the spring 11 toward the lock ball 8 side, that is, in the direction of holding down the lock ball 8, but is pushed toward the outer circumference of the middle tube 2 by the insertion portion 28 of the plug 5. A part of the lock ball 8 is brought into contact with the lock ball 8 protruding from the outer periphery of the middle cylinder 2, and movement of the presser is prevented.

(See Figure 3).

Furthermore, when the insertion part 28 of the plug 5 is inserted into the middle cylinder 2 and the engagement groove 37 formed in the insertion part 28 reaches the position of the button pole 8, the lock ball 8 is engaged into the engagement groove 37. At this time, the lock ball holding sleeve 10, whose movement was blocked by the lock ball 8, is released from the block and moves in the direction of holding the lock ball 8 due to the elasticity of the spring 11, and the lock ball holding part 9 is moved. The opening of the tapered small hole 7 is closed, and the lock ball 8 is inserted into the plug 5.
The plug '5 is inserted and fixed into the inner cylinder 2 in such a way as to prevent it from coming off from the engagement groove 37 formed in the insertion part 28 (
(See Figure 4).

To remove the plug 5 inserted and fixed in this manner from the inner cylinder 2, appropriate piping is connected to the air inlet 20 formed in the outer cylinder 1, and compressed air is sent through the air inlet 20.

The compressed air sent from the air inlet 20 is passed through the compressed air guide groove 21 formed on the outer periphery of the middle cylinder 2 to the sleeve operating cylinder 14, which is installed freely in the axial direction and airtight between the outer cylinder 1 and the middle cylinder 2. The compressed air is guided to the opposite end a of the pressing part 15, and the sleeve operation cylinder 14 is moved in the side direction of the lock pole holding sleeve 10 by this compressed air. The compressed air guides the plug extrusion tube 17 to the opposite end of the extrusion part 18 of the plug extrusion tube 17 installed airtightly and freely in the axial direction between the inner tube 3 and the inserted plug 5 side. First, by the movement of the sleeve operation cylinder 14, the lock ball holding sleeve 10 is pressed and moved by its pressing part 15 against the spring 11, and the lock ball 8 is moved by the lock ball holding part 9. When the lock ball 8 is released, the inserted plug 5 is pushed outward from the middle cylinder 2 by the pushing movement of the plug push-out cylinder 17, and is pushed into the insertion portion 28 of the lock ball 8. The lock ball 8 engaged with the formed retaining groove 37 is pushed out of the middle cylinder 2 to the outside of the inner cylinder 2 (see FIG. 6).

Note that the pressure of the compressed air sent from the air inlet 20 of the outer cylinder 1 must be sufficient to move the sleeve operation cylinder 14 and the plug push-out cylinder 17, and especially when the inside of the pipe is in a vacuum state, the suction due to this vacuum is Requires air pressure that overcomes the force applied.

As described above, the present invention consists of an outer cylinder, a middle cylinder, and an inner cylinder whose positions do not change with respect to each other, and the middle cylinder includes a lock ball and a lock ball retainer to which the inserted plug is detachably connected. A sleeve operating sleeve for releasing the lock ball holding sleeve of the lock ball holding sleeve is installed airtightly and freely in the axial direction between the outer cylinder and the inner cylinder. A plug extrusion cylinder for pushing the inserted plug out of the bay is installed between the cylinder and the sleeve in an axially freely and airtight manner, and the sleeve operation cylinder is moved in the sleeve side direction and a plug extrusion cylinder is installed between the cylinder and the cylinder. Since we have provided an inlet for blowing compressed air to move the tube toward the plug, removing the inserted plug can be done by simply blowing compressed air through the inlet formed in the outer tube without requiring any manual effort. Since the inserted plug can be removed reliably by means of the method, it is easy to remove the inserted plug, and furthermore, the inserted plug can be removed by remote control of the pneumatic circuit, making the work easier. Even if the installation location is in a bad environment, it can be easily removed from a distance, increasing work safety, etc., making it the most convenient pipe joint, and the range of its use has also increased significantly. It has the effect of enlarging.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a vertical side view, Fig. 2 is a perspective view of the inner cylinder, and Figs. 3 to 6 are partial longitudinal sections showing the procedure for attaching and removing the plug. It is a diagram. 1... Outer cylinder, 2... Middle cylinder, 3...
... Inner cylinder, 5 ... Plug, 8 ... Lock ball, 10 ... Sleeve for holding lock ball, 14 ... Sleeve operation tube, 17.・・・・・・
・Plug extrusion tube, 20...Inlet.

Claims (1)

[Scope of utility model registration request] It consists of an outer cylinder, a middle cylinder, and an inner cylinder whose positions do not change with each other, and the middle cylinder is equipped with a lock ball that connects the inserted plug in a detachable manner and a sleeve for holding the lock ball. Between the outer cylinder and the middle cylinder, a sleeve operating cylinder for releasing the lock ball holding sleeve of the lock ball holding sleeve is installed in an axially movable and airtight manner.A plug is inserted between the waist middle cylinder and the inner cylinder. A plug extrusion cylinder for pushing out the sleeve is installed in an axially movable and airtight manner, and compressed air is supplied to the outer cylinder to move the sleeve operation cylinder toward the sleeve side and also to move it toward the plug side. A pipe joint characterized by having an inlet for blowing air into the pipe.