JPH081357Y2 - Pipe fitting - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a pipe joint.

[0002]

2. Description of the Related Art For example, when connecting a pipe of a cooling device for an automobile and a pipe of a refrigerant charging device, a pipe having an annular groove formed in an outer peripheral portion of an end is used as the pipe of the cooling device. There is.

As a pipe joint connected to a pipe in which an annular groove is formed on the outer peripheral portion of the end, there is a pipe joint having the following construction. That is, both ends are opened and the tip opening communicates with the pipe, the connecting pipe is connected to the base end opening, and the main cylinder having the valve seat formed in the internal hole, and the axial movement in the internal hole of the main cylinder. A valve body that is arranged and seats on the valve seat to close the inner hole of the main body cylinder, a valve body urging body that applies a force toward the valve seat to the valve body, and a shaft on the outer periphery of the tip of the main body cylinder. A connecting cylinder fitted so as to be movable in a direction and having a distal end fitted to the outer peripheral portion of the end of the pipe and an annular ring groove formed in the outer peripheral portion; An engagement hole that has a connection cylinder stop portion that prevents movement toward the tip of the main body cylinder and that penetrates between the inner hole and the outer peripheral portion at a position facing the annular groove of the pipe when fitted to the pipe. And a connection tube having a connection tube that holds the connection tube in a radial direction so that the connection tube can move in the radial direction. Reciprocal engagement body, a connecting cylinder biasing body that applies a force toward the tip of the main body cylinder to the connecting cylinder and a force toward the base end of the main body cylinder, and an axial direction on the outer peripheral portion of the connecting cylinder. The engaging body is movably provided so as to project toward the inner peripheral side of the connecting cylinder when moved toward the distal end of the main body cylinder, and the engaging body connects to the connecting body when moving toward the base end of the main body cylinder. The operating sleeve is configured to allow the inner sleeve to project toward the inner peripheral side, and the operating sleeve urging body applies a force to the operating sleeve toward the tip of the main body barrel.

In this pipe joint, the connecting cylinder is normally displaced toward the base end of the main body cylinder by the connecting cylinder urging body, and the engaging body provided in the engaging hole formed in the connecting cylinder is attached to the main body cylinder. It is pushed and displaced to the outer peripheral portion of the connecting tube. Further, the operation sleeve is displaced toward the front end side of the main body cylinder by the operation sleeve biasing body, but the displacement is prevented by the engaging body.

When the pipe joint is connected to a pipe, the pipe is inserted from the tip of the connecting cylinder to the tip of the main body cylinder, and the engaging body provided in the engaging hole is pushed by the connecting cylinder so that the pipe Engage in the annular groove. Piping opens the passage by pushing the valve body of the main body. Since the operating sleeve is displaced toward the front end side of the main body cylinder by the urging body, the engagement body maintains the state of being engaged with the annular groove of the pipe. This can lock the connection between the pipe and the joint.

[0006]

However, even in the above-mentioned pipe joint, when the connecting cylinder is accidentally moved toward the base end of the main body cylinder, the engagement body is engaged with the annular groove of the pipe. In some cases, the engagement body is released and the engagement body becomes free, and the connection between the pipe and the joint is released. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe joint that can reliably lock the joint state with a pipe by a simple operation.

[0007]

In order to achieve the above-mentioned object, a pipe joint of the present invention is a pipe joint connected to a pipe having an annular groove formed in the outer peripheral portion of the end portion, in which both ends are open and the tips are A main body cylinder communicating with the pipe, having a base end connected to a connection pipe, an inner hole provided with a valve seat, and an outer peripheral portion provided with a rotation lock body receiving portion, and a shaft in the inner hole of the main body cylinder. Is movably arranged and seated on the valve seat to close the inner hole of the main body cylinder, and when the main body cylinder and the pipe communicate with each other, the pipe prevents movement toward the tip of the main body cylinder. A valve body, a valve body biasing body that applies a force toward the valve seat to the valve body, both ends of which are open and axially movable and liquid-tightly fitted to the outer periphery of the tip of the main body cylinder. The tip is fitted to the outer peripheral portion of the tip of the pipe and A first connecting cylinder having an annular groove formed in the peripheral portion, and a force is applied to the first connecting cylinder toward the tip of the main body cylinder and a force is applied to the main body cylinder toward the base end thereof. A first connecting-cylinder urging body, both ends of which are open, are provided on the outer periphery of the first connecting cylinder so as to be movable in the axial direction, and the tip and the base end project from the tip and the base end of the first connecting cylinder. A connection tube stopping portion that is fitted to the outer peripheral portion of the portion of the pipe where the annular groove is formed and that prevents the first connection tube from coming into contact with the internal hole and moving in a direction approaching the tip of the main body tube. Further having a first engaging hole penetrating between the inner hole and the outer peripheral portion at a position facing the annular groove of the pipe when the tip is fitted to the pipe, and Second engagement at a position opposed to the annular groove of the first connection cylinder when moved toward the base end A second connecting cylinder, a first engaging body movably held in the first engaging hole of the second connecting cylinder in the radial direction of the second connecting cylinder, and the second connecting cylinder. A second engaging body, which is held in an engaging hole so that the second connecting cylinder is movable in the radial direction, and the first engaging hole and the second engaging body are provided in an outer peripheral portion of the second connecting cylinder.
Is provided so as to be movable in the axial direction within a range capable of simultaneously covering the engaging holes, and when the inner peripheral portion is moved toward the tip of the main body cylinder, the first engaging body and the second engaging body are pushed to respectively The second connecting cylinder has an engaging body pressing portion that projects toward the inner peripheral side, and when the second connecting cylinder moves toward the base end of the main body cylinder, the second engaging body of the first engaging body and the second engaging body An operation sleeve having an engagement body escape portion that allows the connection cylinder to project to the outer peripheral portion, an operation sleeve biasing body that applies a force to the operation sleeve toward the tip of the main body cylinder, and the second connection cylinder. The distal end is screwed to the base end of the internal hole, the tip abuts on the body cylinder base end side surface of the rotation lock body receiving portion of the outer peripheral portion of the body cylinder, and the base end projects outward from the base end of the second connection cylinder. A rotation operation part is formed there, and it is possible to rotate this rotation operation part. A rotation lock body that moves in the axial direction of the main body cylinder and pushes the main body cylinder in the same direction when moving toward the tip of the main body cylinder to separate the valve seat from the valve body. Is characterized by.

[0008]

The pipe is inserted from the tip of the second connecting tube to the tip of the main body tube through the first connecting tube. The first engagement body of the first engagement hole is pushed by the operation sleeve and engages with the annular groove of the pipe. The second engagement body of the second engagement hole is pushed by the operation sleeve and engages with the annular groove of the first connection cylinder. Piping opens the passage by pushing the valve body of the main body. Since the operating sleeve is displaced toward the front end side of the main body cylinder by the urging body, the engagement body maintains the state of being engaged with the annular groove of the pipe.

Then, the rotation lock body is rotated to move to the tip end side of the main body cylinder, and the second connecting cylinder prevents movement toward the front end of the main body cylinder. This ensures that the connection between the pipe and the joint can be locked.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This embodiment is intended for a pipe joint used when connecting a pipe of a cooling device for an automobile and a pipe of a refrigerant charging device.

As shown in FIG. 1, reference numeral 1 is a pipe of a cooling device, and this pipe 1 has an annular projection 2 on the outer peripheral portion of the end from the tip side.
And the annular groove 3 are formed side by side. A stopper 4 is provided inside the pipe 1. The pipe 1 is connected to a cooling device (not shown).

Next, the structure of the pipe joint will be described. 1
Reference numeral 1 is a main body cylinder. Both ends of the main body cylinder 11 are open, the front end communicates with the pipe 1, and the base end is connected with a connection pipe connected to a refrigerant charging device (not shown). Further, the main body cylinder 11 is provided with a valve seat 12 in an inner hole and a rotation lock body receiving portion 13 on an outer peripheral portion.

Reference numeral 14 is a valve body. The valve body 14 includes a rod portion 14a and a valve body portion 1 formed at the base end of the rod portion 14a.
4b and. Then, the rod-shaped portion 1 of the valve body 14
4a is arranged in the inner hole of the main body cylinder 11 so as to be movable in the axial direction, and when the rod-shaped portion 14a moves toward the tip of the main body cylinder 11, the valve body portion 14b is seated on the valve seat 12 and While the internal hole is closed, when the main body cylinder 11 and the pipe 1 communicate with each other, the rod-shaped portion 14a comes into contact with the stopper 4 of the pipe 1 to prevent the main body cylinder 11 from moving toward the tip.

Reference numeral 15 is a valve element urging spring composed of a compression coil spring, and this spring 15 applies a force to the valve element 14 toward the valve seat 12. Reference numeral 16 is a first connecting cylinder. Both ends of the first connecting cylinder 16 are open, and an annular groove 17 is formed in the outer peripheral portion.
Are formed. It is fitted to the outer peripheral portion of the tip of the main body cylinder 11 so as to be movable in the axial direction, and has an O-ring 1 in the inner hole.
9 is provided to provide airtightness with the outer peripheral portion of the main body cylinder 11. The tip of the first connecting cylinder 16 is adapted to be fitted to the outer circumference of the pipe 1, and the O-ring 18 is provided at the tip of the internal hole.

Reference numeral 20 is a first connecting cylinder biasing spring which is a compression coil spring. The spring 20 is provided in the first connecting cylinder 16
In addition to applying a force toward the tip of the main body cylinder 11, a force is applied toward the base end of the main body cylinder 11.

Reference numeral 21 is a second connecting cylinder. Both ends of the second connecting cylinder 21 are open, and the first connecting cylinder 1 is inserted into the inner hole.
6 has a connecting cylinder stopping portion 22 that prevents the movement of 6 toward the tip of the main body cylinder 11.

The second connecting cylinder 21 is provided on the outer peripheral portion of the first connecting cylinder 16 so as to be movable in the axial direction, and the front end and the base end project in the axial direction from the front end and the base end of the first connecting cylinder 16.
The tip is fitted to the outer peripheral portion of the portion of the pipe 1 where the annular groove 3 is formed.

Furthermore, the second connecting cylinder 21 has a first end penetrating between the inner hole and the outer peripheral portion at a position facing the annular groove 3 of the pipe 1 when the tip thereof is fitted into the pipe 1. Engagement hole 23
Is formed, and when it moves toward the base end of the main body cylinder 11, the second groove is formed at a position facing the annular groove 17 of the first connection cylinder 16.
Engaging holes 24 are formed. In addition, each engagement hole 23,
Reference numeral 24 is a tapered hole whose diameter gradually increases from the inner hole side of the second connection cylinder 21 toward the outer peripheral side.

Reference numeral 25 is a first engaging body made of a spherical body.
The first engagement body 25 is held in the first engagement hole 23 of the second connection cylinder 21 so that the second connection cylinder 21 can move in the radial direction, and is prevented from slipping out to the inner hole side. It has been blocked.

Reference numeral 26 is a second engaging body made of a sphere.
The second engagement body 26 is held in the second engagement hole 24 of the second connection cylinder 21 so that the second connection cylinder 21 can move in the radial direction, and is prevented from slipping out to the inner hole side. It has been blocked.

27 is an operating sleeve. The operation sleeve 27 is provided on the outer peripheral portion of the second connection cylinder 21 so as to be axially movable within a range capable of simultaneously covering the first engagement hole 23 and the second engagement hole 24.

Further, the operating sleeve 27 pushes the first engaging body 25 and the second engaging body 26, respectively, when the operating sleeve 27 moves toward the tip of the main body cylinder 11 in the inner peripheral portion, and the inner peripheral surface of the second connecting cylinder 21. It has a pair of engaging body pressing portions 28 and 29 which are projected to the side, and when moved toward the base end of the main body cylinder 11, the first
Second connecting cylinder 2 of the engaging body 25 and the second engaging body 26 of
1. A pair of engaging body escape portions 3 that allow the protrusion of 1 to the outer peripheral portion.
It has 0 and 31.

Reference numeral 32 is a spring for urging the operating sleeve which is a compression coil spring. This spring 32 is used for the operating sleeve 27.
The force is applied to the tip of the main body cylinder 11. Three
Reference numeral 3 is a rotation lock body. The rotation lock body 33 has a threaded portion 33a formed on the outer peripheral portion thereof, and the threaded portion 33a is formed at the base end of the internal hole of the second connection cylinder 21 and is threaded 21a.
It is screwed to. The end of the rotation lock body 33 abuts on the side surface of the main body cylinder of the rotation lock body receiving portion 13 on the outer peripheral portion of the main body cylinder 11, and the base end of the rotation lock body 33 projects outward from the base end of the second connection cylinder. The rotation operation part 34 is formed. Therefore, the rotation lock body 33 is moved in the axial direction of the main body cylinder 11 while being rotated by the rotation of the rotation operation portion 34.

The rotation lock body 33 is composed of the main body cylinder 11
When moving toward the distal end of the valve body 12, the main body cylinder 11 is pushed and moved in the same direction to separate the valve seat 12 from the valve body portion 14b of the valve body 14.

In the figure, reference numeral 35 is a long hole formed in the second connecting cylinder 21 along the axial direction, reference numeral 36 is a guide pin attached to the main body cylinder 11 and inserted into the long hole 35. The operation of the pipe joint thus configured, which guides the main body cylinder 11 to move in the axial direction, will be described.

The case where the pipe joint is not connected to the pipe will be described with reference to FIG. In this case, the first connecting cylinder 16 is displaced toward the tip end side of the main body cylinder 11 by the connecting cylinder biasing spring 20, and the first engaging hole 25 of the second connecting cylinder 21 is moved to the first engagement hole 25.
The engaging body 25 of the second connecting cylinder 21 is displaced to the outer peripheral portion of the second connecting cylinder 21, and the second engaging hole 24 of the second connecting cylinder 21 is
The engaging body 26 is displaced toward the outer peripheral portion of the second connecting cylinder 21.

The operating sleeve 27 is displaced toward the tip of the main body cylinder 11 by the operating sleeve biasing spring 32. At this time, the operating sleeve 27 has the engagement body escape portions 3
Nos. 1 and 0 located on the outer peripheral side of the second connecting cylinder 21
The first engaging body 25 of the engaging hole 25 and the second engaging body 26 of the second engaging hole 24 are received. As a result, the movement of the operation sleeve 27 toward the tip of the main body cylinder 11 is restricted. The valve body 14 is pushed by the spring 15 and the valve body portion 14b is seated on the valve seat 12 to close the inner hole of the main body cylinder 11.

The case of connecting the pipe joint to the pipe will be described with reference to FIG. 2. The pipe 1 is inserted from the tip of the second connecting cylinder 21 to the tip of the main body cylinder 11 via the first connecting cylinder 16. At this time, the ring-shaped protrusion 2 of the pipe 1 is attached to the first connecting cylinder 16
Push the tip of the toward the base side. The first connecting cylinder 16 moves toward the base end side in this way by the spring force of the biasing spring 20, and the first engaging body 25 of the first engaging hole 25 of the second connecting cylinder 21.
And the state in which the second engagement body 26 of the second engagement hole 24 is displaced toward the outer peripheral portion of the second connection cylinder 21 is released.

At the same time, the second connecting cylinder 21 is pushed by the biasing spring 32 and moves toward the tip of the main body cylinder 11. This time,
The engaging body pressing portions 28 and 29 are the first engaging holes 25 of the first engaging hole 25.
The engaging body 25 and the second engaging body 26 of the second engaging hole 24 are pressed from the outer peripheral side, respectively, and the state of being displaced toward the inner hole of the second connecting cylinder 21 is maintained.

Then, the second engaging body 26 of the second engaging hole 24 is pushed by the holding portion 29 of the operating sleeve 27 and engages with the annular groove 17 of the first connecting cylinder 16. Further, the first engagement body 25 of the first engagement hole 23 is pushed by the operation sleeve 27 and engages with the annular groove 32 of the pipe 1.

Further, the stopper 4 provided on the pipe 1 pushes the rod portion 14a of the valve body 14 of the main body cylinder 11 to push the valve body portion 14
b is separated from the valve seat 12. As a result, the internal hole of the main body 11 is opened, the pipe 11 is connected to the main body tube 11 and the connection pipe connected to the main body tube 11, and the refrigerant of the refrigerant charging device is supplied to the piping 11.

In this state, as shown in FIG.
It is possible to lock the state in which is connected to the pipe joint. However, the main body cylinder 11 and the rotation lock body 33 are in the positions shown in FIG. However, the operation sleeve 27 is mistakenly inserted into the main body cylinder 1.
When the first and second engaging bodies 25 and 26 are moved toward the base end of 1, the annular groove 3 of the pipe 1 and the first connecting tube 1 are moved.
The state in which it is engaged with the annular groove 17 of 6 is released, the engagement body becomes free, and the first connection cylinder 16 is pushed by the spring 20 and moves toward the tip side of the main body cylinder 11, The connection between the and the joint may be released.

Therefore, as shown in FIG.
Thus, the rotation lock body 33 is rotated. Rotation lock body 33
Moves toward the tip of the main body cylinder 11 while rotating with the combination of the screw portion 33a and the screw portion 21a of the second connection cylinder 21.

Then, the tip of the rotation lock body 33 comes into contact with the main body base end side surface of the rotation lock body stopping portion 13 of the body cylinder 11, and the body cylinder 11 is moved toward the tip. As a result, the main body cylinder 11 moves toward the tip thereof, and the main body cylinder 1
The outer peripheral surface of No. 1 and the inner peripheral surface of the first connection cylinder 16 overlap and the length in the axial direction in which they come into contact with each other increases.
When the operation sleeve 27 is moved toward the base end of the main body cylinder 11 due to the frictional resistance caused by the contact between the outer peripheral surface of the first connection cylinder 16 and the inner peripheral surface of the first connection cylinder 16, the first and second engagement bodies 25, 2
Even when the state in which 6 is engaged with the annular groove 3 of the pipe 1 and the annular groove 17 of the first connecting tube 16 is released and the engaging body is freed, the spring 20 is attached to the first connecting tube 16. The first connecting cylinder 16 stops the movement applied toward the tip of the main body cylinder 11 against the force applied toward the front end side of the main body cylinder 11. In particular, the O-ring 18 provided on the first connecting cylinder 16 increases the frictional resistance with the main body cylinder 11.

Therefore, the first connecting cylinder 16 is prevented from being pushed by the spring 20 and moving toward the tip end side of the main body cylinder 11 to release the connection between the pipe and the joint, and the pipe 1 The connection between and can be locked securely.

Moreover, this lock operation is performed by the rotation lock body 3
It's as simple as rotating 3 It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with various modifications.

[0037]

As described above, according to the present invention, it is possible to obtain a pipe joint which can securely lock the joint state with the pipe by a simple operation.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a pipe joint according to an embodiment of the present invention is not connected to a pipe.

FIG. 2 is a cross-sectional view showing a state in which the pipe joint of the embodiment is connected to a pipe.

[Explanation of symbols]

1 ... Piping, 11 ... Main body tube, 14 ... Valve body,
16 ... 1st connection cylinder, 21 ... 2nd connection cylinder, 27 ... Operation sleeve, 33 ... Rotation lock body.

Claims (1)

[Scope of utility model registration request] 1. A pipe joint connected to a pipe in which an annular groove is formed on an outer peripheral portion of an end, both ends of which are open, a tip communicates with the pipe, a connecting pipe is connected to a base end, and an internal hole is formed. A main body cylinder provided with a valve seat and a rotation lock body receiving portion formed on an outer peripheral portion thereof, and an internal hole of the main body cylinder arranged so as to be movable in the axial direction. With closing the hole,
A valve body that is prevented from moving toward the tip of the main body cylinder by the pipe when the main body cylinder and the pipe communicate with each other; and a valve body biasing body that applies a force toward the valve seat to the valve body. , Both ends of which are axially movable and liquid-tightly fitted to the outer circumference of the tip of the main body cylinder, and the tip is fitted to the outer circumference of the tip of the pipe and an annular ring groove is formed on the outer circumference. And a first connecting-cylinder urging body that applies a force to the first connecting cylinder toward the distal end of the main body cylinder and applies a force to the main body cylinder toward the base end thereof. , Both ends of which are open and provided on the outer periphery of the first connecting cylinder so as to be movable in the axial direction, and the distal end and the proximal end project from the distal end and the proximal end of the first connecting cylinder, and the distal end forms an annular groove of the pipe. The first connecting cylinder is fitted into the outer peripheral portion of the portion and contacts the inner hole, The body cylinder has a connecting cylinder stopping portion for preventing the movement toward the tip, and further penetrates between the inner hole and the outer peripheral portion at a position facing the annular groove of the pipe when the tip is fitted into the pipe. A second connection cylinder having a first engagement hole and having a second engagement hole at a position facing the annular groove of the first connection cylinder when moved toward the base end of the main body cylinder; , A first engaging body held in the first engaging hole of the second connecting cylinder so as to be movable in the radial direction of the second connecting cylinder and the second engaging hole in the second engaging hole. A second engagement body that is held so as to be movable in the radial direction of the connecting cylinder, and a range in which the outer periphery of the second connecting cylinder can simultaneously cover the first engaging hole and the second engaging hole. Is provided so as to be movable in the axial direction, and when the inner peripheral portion is moved toward the tip of the main body cylinder, the first engaging body and the The first engagement body and the second engagement body have an engagement body pressing portion that pushes each of the two engagement bodies to project toward the inner peripheral side of the second connection cylinder, and moves toward the base end of the main body cylinder. An operation sleeve having an engagement body escape portion that allows the engagement body of the above to project to the outer peripheral portion of the second connection cylinder; and an operation sleeve biasing body that applies a force to the operation sleeve toward the tip of the main body cylinder. A second end of the second connecting tube is screwed into a proximal end of an inner hole of the second connecting tube, and a tip of the second connecting tube abuts a side surface of a main body tube of a rotation lock body receiving portion of an outer peripheral portion of the main tube. A rotation operation part is formed protruding from the base end of the body to the outside, and the rotation operation of the rotation operation part moves in the axial direction of the body cylinder and pushes the body cylinder when moving toward the tip of the body cylinder. Move in the same direction to separate the valve seat from the valve body Pipe joint, characterized by comprising: a rotation lock member, the to.