JP3086710U - Gas injection tube connector - Google Patents

Abstract

(57) [Problem] To prevent a detachment of a working tube by forming a locking ring claw at an end of a connecting tube of a female connector into which a male connector is inserted,
The clearance between the connecting pipe and the working pipe is minimized so that the inflow of foreign matter is blocked. An inner peripheral wall of an operating tube (20) having an inner diameter formed so that a female connector (A) of a set of male and female connectors for connecting a gas injection tube (10) is fitted almost completely on an outer peripheral surface of a connection tube (10). At the end, a ball guide groove 22 having a recessed wall surface is provided so that a half surface of the fixed ball 12 can be accommodated, and the outer peripheral surface of the connecting pipe 10 is overlapped with and joined to the end face of the working pipe 20. The locking ring claws 14 projecting in the direction are provided by forging.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a connector for a gas injection pipe, and more specifically, a locking ring claw is formed at an end of a connection pipe body of a female connector into which a male connector is inserted to prevent detachment of a working pipe. The present invention relates to a gas injection pipe connector configured to minimize the gap between a connection pipe and a working pipe so that inflow of foreign matter is blocked, and to realize accurate pipe connection and reliable operation.

[0002]

[Prior art]

 Generally, as shown in FIG. 5, a conventional gas injection pipe connector has fixed ball holes formed in a plurality of connection holes 11 formed in an opening of a connection pipe body 10 of a female connector into which a male connector is inserted. 12 are accommodated therein, and an operating tube 20 urged toward the open end by a spring 21 is fitted on the outer peripheral edge of the connecting tube 10 in a sliding manner in the axial direction. A locking ring 16 is connected to the locking groove 15 on the outer peripheral edge, and a receiving claw 23 formed on the inner wall surface of the working tube 20 is engaged with the locking ring 16, whereby the working tube 20 is connected to the connecting pipe. It is configured not to be separated from the body 10. Then, the movement in the radial direction is restricted by contacting the working tube 20, and the end face of the fixed ball 12 protruding inward from the connecting hole 11 into the working tube 20 is attached to the male connector inserted into the female connector. The two connectors are integrally connected by engaging with the outer peripheral surface.

However, the locking ring 16 coupled to the outer peripheral edge of the connecting pipe body 10 is merely fitted in the locking groove 15, and the operating pipe 20 is slid to engage with the locking ring 16. At this time, the locking ring 16 may be detached, and the working tube 20 may be detached from the connection tube 10. Further, in a state where the male and female connectors are connected, a gap is formed between the outer periphery of the connection pipe body 10 and the receiving claw 23 of the working pipe 20, and foreign matter such as dirt, dust, and oil enters the gap. In some cases, the fluid may accumulate and hinder the operation of sliding the working tube 20.

[0004]

[Problems to be solved by the invention]

 According to the present invention, in order to solve such a problem, an outer protruding portion that overlaps and joins an end surface of the working tube is provided on a peripheral portion of an opening end of the connecting tube of the female connector in which the working tube is fitted. Accordingly, the working tube is prevented from being detached from the connecting tube, and the space between the two tubes is minimized to prevent foreign matter from entering.

[0005]

[Means for Solving the Problems]

 The present invention is a set of male and female connectors for connecting a gas injection pipe. A female connector A has a fixed ball 12 accommodated in a connection hole 11 formed in a peripheral wall of an opening of a connection pipe body 10. The operating pipe 20 is mounted on the outer circumference of the connecting pipe body 10 so as to be slidable in the axial direction and resiliently biased to the open end side by the spring 21 so that the operating pipe 20 comes into contact with the operating pipe in the radial direction. In a gas injection pipe connector, the fixed ball 12 whose movement is restricted is engaged with the outer peripheral surface of the male connector B inserted into the female connector A so that the two connectors A and B are integrally connected. A ball guide groove 22 formed by recessing a wall surface so that a half surface of the fixed ball 12 can be accommodated at an end portion of an inner peripheral wall of a working tube 20 having an inner diameter formed to fit substantially completely on an outer peripheral surface of the connection pipe body 10. And the open end of the connection pipe 10 An outwardly protruding locking ring claw 14 is provided at the edge to overlap and join the end surface of the working tube 20, and the fixed ball 12 is moved into the ball guide groove 22 while the working tube 20 is slid toward the base side of the connecting tube 10. When the working tube 20 is slid toward the open end of the connecting tube 10, the fixed ball 12 is connected to the working tube 20 adjacent to the ball guide groove 22. The connector engages with the outer peripheral surface of the male connector B inserted into the female connector A while being in contact with the inner wall, and the engaging ring pawl 14 is joined to the end surface of the working tube 20 urged by the spring 21 to resiliently press the connector. The above-mentioned problem was solved by configuring to maintain the connected state of the above. In the above configuration, the locking ring pawl 14 can be formed by fitting the working tube 20 to the connecting tube 10 and then forging the peripheral edge of the opening end of the connecting tube 10.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 4, the connector of the present invention comprises a female connector A for connecting a gas injection pipe and a male connector B.

The female connector A includes a connection tube 10 into which the male connector B is inserted, and an operation tube 20 slidably mounted on the outer periphery of the connection tube 10 in an axial direction. More specifically, a plurality of connection holes 11 are formed in the peripheral wall of the opening of the connection pipe 10 so that the inside diameter is smaller than the outside of the pipe and penetrate through the inside and outside of the wall. Have been. The working tube 20 is fitted to the outer periphery of the connection tube 10 so as to cover the connection hole 11 in which the fixed ball 12 is housed, and is also connected by a spring 21 wound around the connection tube 10. Elastic pressure is applied to the opening end side of 10.

The working tube 20 is formed to have an inside diameter that fits almost completely on the outer peripheral surface of the connection tube body 10, and has an inner peripheral wall end portion having a size enough to accommodate a half surface of the fixed ball 12. A ball guide groove 22 having a recessed wall surface is formed. Further, on the periphery of the opening end of the connecting pipe body 10, an outwardly protruding locking ring claw 14 which is overlapped with and joined to the end face of the working pipe 20 is formed. In the drawing, reference numeral 30 denotes an operating valve, 31 denotes a spring, and 32 denotes a connecting pipe.

As shown in FIG. 1, the female connector A has a connection tube 10 having a projection 13 formed in advance on the periphery of the open end, and a fixed ball 12 and a spring 21 mounted on the connection tube 10. It is constituted by fitting the working tube 20 and then forging the projection 13 outward to form a locking ring claw 14 to be joined to the end surface of the working tube 20. The female connector A thus configured can prevent the working tube 20 from being detached by engaging the end face of the operating tube 20 with the locking ring claw 14. Since it overlaps with and is closely joined to the end face of the working tube 20, a gap between the connection pipe 10 and the working tube 20 can be minimized, and foreign matter can be prevented from entering the gap.

In the gas injection connector of the present invention configured as described above, when the operating tube 20 is pulled downward to insert the male connector B into the connection tube 10 of the female connector A, the spring 21 is compressed. As a result, the working tube 20 slides toward the base side of the connection tube body 10, and in this state, the fixed ball 12 is immersed in the ball guide groove 22, so that the male connector B can be mounted on the female connector A. When the operating tube 20 is released after the male connector A is mounted, the operating tube 20 is slid toward the open end of the connecting tube 10 by the elastic force of the spring 2. In this state, the fixed ball 12 is moved into the ball guide groove 22. The end face of the fixed ball 12 which comes into contact with the inner wall of the lower working tube 20 and protrudes inwardly of the working tube 20 from the connection hole 11 is engaged with the outer peripheral surface of the male connector B, and both connectors are integrally connected. Further, in this state, the engagement ring pawl 14 is engaged in close contact with the end face of the working tube 20 so that the connection state of the connectors A and B is maintained. The gap between the outer peripheral surface of the connection pipe 10 and the inner peripheral surface of the working tube 20 is blocked by the locking ring claws 14, and foreign matter is prevented from entering the gap. it can.

[0011]

[Effect of the invention]

 As described above, the connector for gas injection according to the present invention has no risk that the working tube fitted on the outer periphery of the connecting tube body will be detached, and that foreign matter enters the gap between the connecting tube body and the working tube and accumulates. This has the practical effect of preventing the occurrence of such problems and ensuring accurate pipe connection and reliable operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a gas injection pipe connector according to an embodiment of the present invention, in a state before an operation pipe is coupled to a connection pipe body of a female connector.

FIG. 2 is a sectional view of a female connector.

FIG. 3 is a sectional view showing a state before a male connector is connected to a female connector.

FIG. 4 is a cross-sectional view showing a state where a male connector is connected to a female connector.

FIG. 5 is a cross-sectional view of a female connector constituting a conventional gas injection tube connector.

[Explanation of symbols]

 Reference Signs List A Female connector B Male connector 10 Connection tube 11 Connection hole 12 Fixed ball 13 Projection 14 Lock ring claw 15 Lock groove 20 Working tube 21 Spring 22 Ball guide groove

Claims (2)

[Utility model registration claims] 1. A set of male and female connectors for connecting a gas injection pipe, wherein a female connector A has a fixed ball 12 housed in a connection hole 11 formed in a peripheral wall of an opening of a connection pipe body 10. The operating pipe 20 is mounted on the outer circumference of the connecting pipe body 10 so as to be slidable in the axial direction and resiliently biased toward the open end side by the spring 21, and is restricted from moving in the radial direction by contacting the operating pipe. The fixed ball 12 engages with the outer peripheral surface of the male connector B inserted into the female connector A, so that the connectors A and B are integrally connected. A ball guide groove 22 formed by recessing a wall surface so that a half surface of the fixed ball 12 can be accommodated at an end of an inner peripheral wall of a working tube 20 formed to have an inner diameter substantially completely fitted on an outer peripheral surface of the operation tube 20.
And an outwardly protruding locking ring claw 14 that overlaps and joins the end face of the working tube 20 is provided on the periphery of the open end of the connecting tube 10, and the working tube 20 is moved toward the base of the connecting tube 10. When the fixed ball 12 is slid, the fixed ball 12 is immersed in the ball guide groove 22 so that the male connector B can be attached and detached. The inner wall of the working tube 20 adjacent to the groove 22 is engaged with the outer peripheral surface of the male connector B inserted into the female connector A while being engaged with the end surface of the working tube 20 urged by the spring 21. A connector for a gas injection pipe configured such that the claws 14 are joined to maintain a connected state of the connector. 2. After fitting the working tube 20 into the connecting tube body 10,
2. The connector for a gas injection pipe according to claim 1, wherein the locking ring claws 14 are formed by forging a peripheral edge of an opening end of the connection pipe body 10.