JPH07127784A - Gas pipe connector - Google Patents

Abstract

PURPOSE:To prevent a ball from falling between the outer half part of the forward end surface of a plug and the forward end surface of an inner cylinder and being caught at the time of fitting the plug to a main body cylinder of a socket, and to prevent gas leakage even if the external force for prizing a connecting part is applied. CONSTITUTION:An inner cylinder 7 elastically energized toward the plug 3 side is disposed in such a manner as to freely move in the main cylinder 2 of a socket 1. A packing 10 is provided on the forward end part of the inner cylinder 7. An operating ring 11 for receiving a ball 5 when the plug 3 is not fitted in the main cylinder 2 is provided on the outer peripheral surface part of the inner cylinder 7 in such a manner as to move freely and in such a manner that the forward end part is freely projected in front of the packing 10. At the initial time when a packing contact part 9 projected on the inner half part of the forward end surface part of the plug 3 presses the packing 10 to move the inner cylinder 7, the operating ring 11 keeps the condition of supporting the ball 5 on the outer peripheral surface thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pipe connector which is connected by mounting a plug on a socket.

[0002]

2. Description of the Related Art Conventionally, as this type of gas pipe connector,
There is one as shown in FIGS. That is, the gas pipe connector shown in FIGS. 5 to 7 includes the socket 1 and the plug 3 that is detachably mounted in the body tube 2 of the socket 1.
It consists of and. The body tube 2 of the socket 1 is provided with a hole 4 penetrating in and out, and a ball 5 is loosely fitted in the hole 4. On the outer periphery of the plug 3, the main body tube 2
An engaging recess 6 is formed so that the ball 5 can be engaged with the plug 3 fitted therein. An inner cylinder 7 is provided in the main body cylinder 2 so as to be movable in the axial direction.
Is elastically urged toward the plug 3 side. A packing fitting recess 16 is provided inside the front end of the inner cylinder 7, and a packing 10 for elastically contacting the packing contact recess 16 provided on the packing contact portion 9 projecting from the inner half of the front end surface of the plug 3. It is fitted and fitted and fixed. Here, the tip end surface of the inner cylinder 7 and the packing 10 are flush with each other. A sliding ring 12 is mounted on the outer periphery of the body tube 2 so as to be slidable in the axial direction of the body tube 2.
The inner periphery of 2 is provided with an escape recess 13 adjacent to each other in the axial direction, through which the ball 5 escapes, and a ball contact surface 14 during lock with which the ball 5 abuts in a state where the ball 5 is fitted in the locking recess 6. There is. The sliding ring 12 is provided with a spring 15 for applying a spring force that causes the ball contact surface 14 to move to a position corresponding to the ball 5 when locked.

In the gas pipe connector having the above structure, the inner cylinder 7 is elastically pushed by the spring member 8 as shown in FIG. 6 when the plug 3 is not fitted in the main cylinder 2 of the socket 1. Then, the ball 5 hits the outer peripheral surface of the tip of the inner cylinder 7, and the upper part of the ball 5 is the recess 5 of the ball 5 of the sliding ring 12.
Is located in. When the plug 3 is fitted into the body cylinder 2 of the socket 1 in this state, the packing contact portion 9 projecting from the inner half of the tip surface of the plug 3 hits the packing 10 and presses the inner cylinder 7 against the spring member 8. And move it to the back. FIG. 7 shows a state where the inner cylinder 7 starts to move to the back. When the inner cylinder 7 moves to the back, the balls 5 move to the outer peripheral surface of the tip of the inner cylinder 7 and the outer circumference of the tip of the plug 3. It is supported so as to straddle the surface through a gap. When the plug 3 is further pushed from this state to move the inner cylinder 7 to the inner side, the outer peripheral surface of the tip of the inner cylinder 7 separates from the ball 5, and the ball 5 is supported by hitting the outer peripheral surface of the plug 3 further. When is pressed to move the inner cylinder 7 further inward, the lower part of the ball 5 fits into the locking recess 6 as shown in FIG. 5, and the lower part of the ball 5 fits into the locking recess 6 in this way. The ball 5 is moved inward by the spring 15, the sliding ring 12 is moved by the spring 15, and the ball contact surface 14 when the sliding ring 12 is locked.
The ball 5 hits and is supported by the ball 5, so that the plug 3 and the socket 1 are joined while the ball 5 holds the locked state.

[0004]

However, in the above-mentioned conventional example, since the tip end surface of the inner cylinder 7 and the packing 10 are flush with each other, the plug 3 is attached to the main body cylinder 2 of the socket 1. In the state of FIG. 7 in the middle of fitting, a gap is formed between the outer half of the tip end surface portion of the plug 3 and the tip end surface of the inner cylinder 7, and the ball 5 may fall into this gap and become caught. was there. In order to prevent this catching, for example, as shown in FIGS. 8 and 9, the tip end surface of the inner cylinder 7 is projected toward the plug 3 side from the packing 10 to form the protruding portion 30 so that the above-mentioned gap is not generated. Is possible, but after connecting the plug 3 to the socket 1 as shown in FIG.
When an external force for twisting the connecting portion between the plug 3 and the socket 1 as shown by the arrow in FIG.
The projecting portion 30 of the tip surface of the plug 3 abuts on the outer half of the tip surface of the plug 3 and tries to pry it as a fulcrum as shown by the arrow in FIG.
The pressing force of 0 may be weakened or a slight gap may be generated to cause gas leakage from this portion. Therefore, as shown in FIG. 8 and FIG.
It is also difficult to adopt a structure in which the plug 3 is protruded from 0.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide an outer half portion of the tip end surface of the plug when the plug is fitted into the body tube of the socket. A gas pipe connection that prevents balls from falling and catching with the tip surface of the inner cylinder, and that prevents gas leakage from the connection part even if an external force that tries to pry the connection part acts after the connection. It is in providing the ingredients.

[0006]

A gas pipe connector of the present invention comprises a socket 1 and a plug 3 which is detachably fitted in a body tube 2 of the socket 1, and penetrates the body tube 2 in and out. A ball 5 is loosely fitted in the hole 4 provided as described above, and a locking recess 6 for locking the ball 5 is formed on the outer periphery of the plug 3 in a state where the plug 3 is fitted into the main body tube 2. An inner cylinder 7 elastically biased toward the plug 3 by a spring member 8 is movably provided at the end of the inner cylinder 7 and a packing contact portion 9 is provided on the inner half of the tip end surface of the plug 3 at the tip of the inner cylinder 7. A packing 10 for elastically contacting the inner cylinder 7 is provided so as to elastically contact the outer cylinder of the inner cylinder 7 when the plug 3 is not fitted into the main body cylinder 2. It is provided so that it can project further forward than the Sliding ring in the axial direction of the body tube 2 1
2 is slidably mounted, and an escape recess 13 axially adjacent to the inner circumference of the slide ring 12 to allow the ball 5 to escape,
A locking ball contact surface 14 is provided on which the ball 5 abuts when the ball 5 is fitted in the locking recess 6, and the sliding ring 12 has a locking ball contact surface 14 at a position corresponding to the ball 5. Spring 1 that gives the spring force to move
5 is provided, and by adopting such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved.

[0007]

According to the present invention as described above, when the plug 3 is fitted into the body tube 2 of the socket 1, the packing contact portion 9 projecting from the inner half of the tip end surface portion of the plug 3 hits the packing 10. Even if the inner cylinder 7 is pressed and starts moving inward against the spring member 8, the actuating ring 11 holds the ball 5 on the outer peripheral surface. And plug 3
When the outer half of the tip end surface of the plug hits the actuating ring body 11, the actuating ring body 11 moves to the rear side and the outer peripheral surface of the tip end portion of the plug 3 supports the ball 5, and the plug 3 is further pushed in. Then, the inner cylinder 7 and the actuating ring 11 move to the inner side, the lower part of the ball 5 fits into the locking recess 6, and the lower part of the ball 5 fits into the locking recess 6 in this way. 5 moves inward and the sliding ring 12 is moved by the spring 15 so that the ball 5 abuts against the ball contact surface 14 of the sliding ring 12 when the sliding ring 12 is locked, thereby supporting the plug 3 and the socket 1. Joining will be performed. Then, during the connecting operation, the support of the ball 5 is continuously transferred from the outer peripheral surface of the actuating ring 11 to the outer peripheral surface of the plug 3, whereby the ball 5 falls into the gap and is caught, thereby hindering the fitting of the plug 3. There is nothing to do. Also, after connecting, plug 3 and socket 1
Even if an external force such as a prying force is applied to the connecting portion with or even if the outer half of the tip surface of the plug 3 pushes the operating ring body 11, the operating ring body 11 moves to the inner side with respect to the inner cylinder 7. Thus, the packing contact portion 9 at the tip of the plug 3 presses the packing 10 more strongly, and it is possible to prevent gas leakage at the connecting portion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. The gas pipe connector is composed of a socket 1 and a plug 3 which is detachably mounted in a body tube 2 of the socket 1. The body tube 2 of the socket 1 is provided with a hole 4 penetrating in and out, and a ball 5 is loosely fitted in the hole 4. An inner cylinder 7 is provided in the main body cylinder 2 so as to be movable in the axial direction, and the inner cylinder 7 is elastically biased toward the plug 3 side by a spring member 8 made of a coil spring.
A packing 10 is integrally fixed to the tip of the inner cylinder 7. A slide groove 18 is provided on the outer peripheral portion of the packing 10 or the outer peripheral portion of the inner cylinder 7. A plug 3 is provided on the outer periphery of the inner cylinder
An operating ring 11 for receiving the ball 5 when it is not fitted in the main body cylinder 2 is fitted movably in the axial direction. As shown in FIG. 4, a projection 19 is provided on the inner peripheral surface of the operating ring body 11 so as to project inward. The projection 19 is slidably fitted in the slide groove 18, The body 11 is configured to be movable with respect to the inner cylinder 7 within a range in which the protrusion 19 can move in the slide groove 18. When the body 11 is moved to the plug 3 side, the distal end portion of the actuating ring body 11 is the inner cylinder. 7 protrudes from the packing 10 provided at the tip end of 7 and moves to the side opposite to the plug 3, the operating ring 11
The range of movement is set so that the tip end of the is substantially flush with or retracted from the packing 10 provided at the tip of the inner cylinder 7. A slide ring 12 is mounted on the outer periphery of the main body cylinder 2 so as to be slidable in the axial direction of the main body cylinder 2. On the inner circumference of the sliding ring 12, there are escape recesses 13 which are adjacent to each other in the axial direction and through which the balls 5 escape, and when the balls 5 are in engagement with the engagement recesses 6, the balls 5 come into contact with each other. And are provided. The sliding ring 12 is provided with a spring 15 for applying a spring force that causes the ball contact surface 14 to move to a position corresponding to the ball 5 when locked. A stopper projection 20 is provided on the outer peripheral portion of the tip end of the main body cylinder 2, and when the ball 5 is in contact with the ball contact surface 14 at the time of locking, the spring force of the spring 15 causes the inner wall 21 of the escape recess 13 to be extended.
However, the sliding ring 12 does not move further by hitting the stopper projection 20 and the ball 5 is kept in contact and held by the ball contact surface 14 when locked. Body tube 2
Further, an outer cylinder 22 is fitted and fixed to the outer cylinder 22, and a large diameter groove portion 23 into which the sliding ring 12 is slidably fitted and a small diameter groove portion 24 in which the spring 15 is disposed are attached to the inner peripheral portion of the outer cylinder 22. Are continuously formed, the sliding ring 12 is slidably fitted in the large-diameter groove portion 23, and the spring 15 is interposed between the groove inner wall of the small-diameter groove portion 24 and the end surface of the sliding ring 12. I am doing it.
An operating projection 25 is provided on the outer peripheral portion of the other end of the sliding ring 12.

On the other hand, an outer peripheral portion of the plug 3 is formed with an engaging concave portion 6 with which the ball 5 can be engaged in a state where the plug 3 is fitted into the main body cylinder 2, and the inside of the tip surface portion of the plug 3 is formed. A packing contact portion 9 is provided in a protruding manner on the half portion, and the outer surface of the packing contact portion 9 is an inclined surface that is located closer to the inside toward the tip. Thus, in the gas pipe connector having the above-described configuration, in the state where the plug 3 is not fitted in the main body tube 2 of the socket 1, as shown in FIG.
Is elastically pushed by the spring member 8, and the ball 5 hits and supports the outer peripheral surface of the actuating ring 11. In this state, the tip of the actuating ring 11 is substantially flush with the tip of the packing 10. Further, in this state, the upper portion of the ball 5 projects above the hole 4 and is located in the escape recess 13 of the sliding ring 12.

Next, when the plug 3 is fitted into the main body tube 2 of the socket 1, the packing contact portion 9 projecting from the inner half of the tip end surface portion of the plug 3 hits the packing 10 and is pressed, so that the inner cylinder 7 is spring material 8. It starts moving to the back against. At the time of disclosure of the movement of the inner cylinder 7 to the back side, the ball 5 is placed on the outer peripheral surface.
Since the working ring body 11 in contact with is not pushed by the outer half of the tip end surface part of the opposing plug 3, only the inner cylinder 7 moves and the operating ring body 11 does not slide and the ball 5 is placed on the outer peripheral surface. Is held in contact with and supported. Then, the outer half of the front end surface of the plug 3 hits the front end of the actuating ring 11, so that the actuating ring 11 starts to move to the back side and the supporting point of the ball 5 is moved to the actuating ring as shown in FIG. The outer peripheral surface of the tip portion 11 of the plug 3 continuously moves to the outer peripheral surface of the tip portion of the plug 3, and therefore, the ball 5 is smoothly fitted into the main body tube 2 without falling into the gap and being caught. . By further pushing in the plug 3 from the state of FIG. 3, the inner cylinder 7 and the operating ring body 11 are moved to the inner side, and the ball 5
The lower part of the ball fits in the locking recess 6 and the ball 5
When the ball 5 moves inward by fitting the lower part of the ball into the locking recess 6, the sliding ring 12 is moved by the spring,
When the sliding ring 12 is locked, the balls 5 contact the ball contact surface 14.
Is hit and supported, whereby the plug 3 and the socket 1 are joined.

When the plug 3 and the socket 1 are connected as shown in FIG. 1, a twisting force as shown by an arrow in FIG. 1 acts on the connecting portion so that the outer half of the tip surface of the plug 3 is an operating ring. Even if 11 is pressed, the actuating ring 11 moves to the inner side with respect to the inner cylinder 7, so that the packing contact portion 9 at the tip of the plug 3 presses the packing 10 more strongly,
It prevents gas leakage at the connection.

On the other hand, in order to release the connection between the socket 1 and the plug 3, the operating projection 25 of the sliding ring 12 is operated to move the sliding ring 12 against the spring force of the spring 15. At the time of locking, the ball contact surface 14 moves along the ball 5, and the ball 5 comes to a position facing the escape recess 13. In this way, when the ball 5 is located in the escape recess 13, the ball 5 becomes free toward the outside, and the inner cylinder 7 provided with the packing 10 at the tip end by the spring member 8 pushes the plug 3 to move it in the direction of removal. By doing so, the upper part of the ball 5 that has become free toward the outside fits into the escape recess 13, and the lower end of the ball 5 moves from the locking recess 6 of the plug 3 to the outer peripheral surface of the plug 3, Since the inner cylinder 7 is pressed by the spring material 8, the ball 5 is slidable from the outer peripheral surface of the plug 3 to the outer periphery of the inner cylinder 7 by moving the plug 3 in the direction in which the plug 3 comes out and moving the inner cylinder 7. The object to be supported is continuously transferred to the outer peripheral surface portion of the actuating ring body 11 that has been fitted. In this way, the plug 3 is pulled out, but in this case, the actuating ring 11 does not move at the beginning of the movement of the inner cylinder 7 to the plug 3 side, and the protrusion 19 is located at one end of the slide groove 18. When hit, the actuating ring 11 moves to the plug 3 side together with the inner cylinder 7, and supports the ball 5 as shown in FIG.

[0013]

As described above, according to the present invention, the inner cylinder, which is elastically biased toward the plug side by the spring member, is movably provided in the main body cylinder, and the plug is provided at the tip of the inner cylinder. A packing is provided in the inner half of the tip end of the plug to make elastic contact with the contact part of the packing, and the operating ring that receives the ball when the plug is not fitted into the main cylinder moves to the outer peripheral surface of the inner cylinder. The tip of the inner cylinder can be freely attached and the tip can be projected further forward than the packing, so that the plug can be fitted into the body cylinder of the socket and the packing abutment that protrudes from the inner half of the tip surface of the plug Even if the inner cylinder is moved to the back side by pressing the packing provided on the, the outer half of the tip surface of the plug does not touch the tip of the operating ring, so the state where the ball is supported by the outer peripheral surface of the operating ring is Keep the tip of the plug The operating ring moves to the back side with the outer half of the part hitting the tip of the operating ring, but at the same time, the ball is continuously supported from the outer peripheral surface of the operating ring to the outer peripheral surface of the plug. As a result, during the fitting operation of the plug, the ball is prevented from falling and getting caught between the outer half part of the tip end surface of the plug and the tip end surface of the inner cylinder. Since it is movable with respect to the socket, the actuating ring moves against the inner cylinder even if an external force that tries to pry the connection part is applied after connecting the plug to the socket, and the packing contact part pushes against the packing more strongly. In this case, the gas can be prevented from leaking from the connecting portion.

[Brief description of drawings]

FIG. 1 is a half sectional view of a connected state of a plug to a socket of the present invention.

FIG. 2 is a half cross-sectional view of the socket in a state where the above plug is not connected.

FIG. 3 is a half sectional view showing a state in which a plug is being connected to the socket of the above.

FIG. 4 is a sectional view of an inner cylinder fitted with an actuating ring used in the above.

FIG. 5 is a half sectional view of a connection state of a plug to a socket of a conventional example.

FIG. 6 is a half cross-sectional view of the socket in a state in which the above plug is not connected.

FIG. 7 is a half cross-sectional view showing a state where the plug is being connected to the socket of the above.

FIG. 8 is a half cross-sectional view of a connection state of a plug to a socket of another conventional example.

FIG. 9 is a half sectional view showing a state where the plug is being connected to the socket of the above.

[Explanation of symbols]

 1 Socket 2 Main Body 3 Plug 4 Hole 5 Ball 6 Locking Recess 7 Inner Cylinder 8 Spring Material 9 Packing Contact Part 10 Packing 11 Actuating Ring 12 Sliding Ring 13 Escape Recess 14 Relief Ball Contact Surface 15 Spring

Claims (1)

[Claims] 1. A socket comprising a socket and a plug which is removably fitted into the body barrel of the socket. A ball is loosely fitted in a hole provided in the body barrel so as to penetrate the body barrel, and the plug is fitted into the body barrel. In this state, a locking recess for locking the ball is formed on the outer periphery of the plug, and an inner cylinder elastically urged by a spring material is provided in the main body cylinder toward the plug side so as to be movable. A packing is provided at the tip for elastically contacting the packing contact portion protruding from the inner half of the tip end surface of the plug, and the actuating ring for receiving the ball when the plug is not fitted into the body cylinder is The outer peripheral surface is movable and the tip is provided so as to project forward of the packing, and a slide ring is slidably mounted on the outer circumference of the main body cylinder in the axial direction of the main body cylinder. The balls run side by side in the axial direction There is a relief recess and a ball contact surface when locked that contacts the ball when it is fitted into the locking recess.The sliding ring will move to the position where the ball contact surface when locked corresponds to the ball. A gas pipe connector, characterized in that a spring for applying a spring force is provided.