JP2000249277A - Separation preventing joint for pipes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation preventing joint for pipes, which enables simple and speedy connection without a tool such as a wrench or the like even in a narrow installation space and enables necessary connection and fixing. SOLUTION: This joint is formed with a connecting part 2 of the end of one pipe 1, a flange-like stopper part 3 at the rear end thereof, a midway O-ring groove 4, an O-ring 5 inserted therein, a collar member 6 which is a collar member 6 removably fitted to the sleeve 8 of the other pipe 7 removably fitted to the connecting part 2 and has the rear end locked on the flange-like stopper part 3, a sleeve 8 at the end of the other pipe 7, a spring member 9 which is a spring member 9 fitted to the rear end of the sleeve and formed by projecting and extending four locking plate springs 9b at intervals of constant angle of 90 deg. toward the tip of the sleeve 8, and a locking part 9c which is a locking part 9a at the tip of the locking plate spring 9b and is locked on the rear end when the collar member 6 is externally fitted to the sleeve 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various kinds of pipes, for example, air-conditioner pipes, oil pipes, water supply pipes, various medical equipment pipes, and refrigerator pipes. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubing separation prevention joint for preventing a tubing joint used therein from slipping out of a pipe at a portion where it does not overlap.

[0002]

2. Description of the Related Art In a conventional pipe of this type, for example, a sleeve at the end of the other pipe is provided on the outer periphery of a connecting portion of one pipe used therein, and the sleeve is connected to the sleeve of the other pipe. There is a type in which a collar member arranged at an end is screwed and connected and fixed. Needless to say,
A male screw is formed on the outer periphery of the sleeve, and a female screw corresponding to the male screw is formed on the inner periphery of the collar member. The collar member is disposed so as to be able to advance and retreat to the other tube, but at the same time, is configured so that the collar member does not come out beyond a certain portion by a stopper member disposed in the middle. An O-ring groove is formed on the outer periphery of the connecting portion, and an O-ring is inserted in the groove, and the O-ring is pressed against the inner periphery of the sleeve provided on the connecting portion to hold the seal. It has become.

[0003] According to the conventional joint as described above, the connection of the pipes constituting the pipe is made by connecting the connection part of one pipe with the sleeve of the other pipe, and then attaching the sleeve of the one pipe to the sleeve. It is performed by screwing the collar member, but usually such pipes are often installed in a narrow space, and it is necessary to operate a tool such as a wrench there for screwing. However, there are many restrictions such as colliding with the surrounding articles, which is troublesome and troublesome.

[0004] Even in the case of other pipe joints, screwing work is required in many cases, and an operation with a spanner or the like is required, which has the same problems as described above.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in connection work in conventional joints, and is used for piping to which strong external force is not applied in the longitudinal direction or the orthogonal direction. It is an object of the present invention to provide a tubing detachment prevention joint which can be easily connected and fixed only by a connection operation in a length direction of the pipe with respect to a joint to be provided.

[0006]

According to one aspect of the present invention, a connecting portion extending from an end of one pipe to be connected;
An O-ring groove formed on the outer periphery of the connection portion, an O-ring inserted in the O-ring groove, a flange-shaped stopper portion formed behind the connection portion, and an outer package detachably mounted on the connection portion. And a collar member to which the rear end loose fitting portion engages with the flange-shaped stopper portion while being detachably mounted on the sleeve described later, and formed at the end of the other pipe to be connected. A spring member having a sleeve detachably mounted on a connection portion of the one tube and a plurality of locking plate springs extending in a direction in which a distal end of the sleeve is extended from near a rear outer periphery of the sleeve; A leading end of each locking leaf spring is detachably engaged with a rear end of the collar member which is detachably mounted on the sleeve, and a spring member adapted to prevent the detachment. It is a joint for preventing detachment of the constructed tubing.

[0007] The tube is not limited to a particular one. It may be all of the joints of the tubing where a strong external force is not applied at the connection portion. For example, pipes for air conditioners used in automobiles, homes, offices, etc., oil pipes in various facilities, water supply pipes, various medical equipment pipes, refrigerator pipes, etc. It can be used for the connection part.

The structure of the O-ring, the O-ring groove for disposing the O-ring, and the connecting portion constituting the O-ring can be the same as that conventionally used.

The spring member extends each locking leaf spring from any part of the outer periphery of the rear part of the sleeve, for example, from the rear end in the direction in which the tip of the sleeve extends. As described above, any configuration can be adopted as long as it can be locked to the rear end of the collar member provided on the sleeve to prevent the collar member from coming off.

The spring member has, for example, an annular base portion, which can be engaged with a step provided at the rear end of the sleeve, and a constant angular interval from the annular base portion. For example, three locking leaf springs at an angular interval of 120 degrees, or four locking leaf springs at an angular interval of 90 degrees, each of which once rises outward and extends in the extension direction of the sleeve. What is necessary is just to make it the structure extended. The leading ends of the locking leaf springs are bent inward, so that they can be locked to the rear end of the collar member. When it is necessary to remove the collar member from the rear end, the collar member can be bent slightly so as to spread outward. When locking, if the tip part is spread outward like that, slide the outer periphery of the collar member and move it to the rear end, the tip part will return inside and lock with the force of the spring It becomes something.

[0011] Therefore, according to the pipe separation prevention joint of one aspect of the present invention, first, one end of the pipe to be connected and the end of the other pipe,
After each of the necessary configurations has been applied, the ends of the tubes are abutted with each other, the sleeve of the other tube is sheathed at the connecting portion of one tube, and then, this time, it is laid down behind the one tube. The placed collar member is moved to the other tube side, and this is covered with the sleeve. At this time, the distal end of each locking leaf spring of the spring member whose base is fixed to the outer periphery of the rear portion of the sleeve slides on the outer periphery of the collar member while slightly expanding outward, and relatively toward the rear. When the collar member moves and advances to a required position, the collar member returns to the inside by a spring force at the rear end, and is locked to the rear end of the collar member.

Thus, without using a tool such as a spanner or a wrench, the two pipes to be connected are simply butted against each other, and one connection portion is inserted into the other sleeve.
Furthermore, the collar members are connected to each other only by a simple operation of externally covering the sleeve, and the fixing of the connection state by the spring member can also be completed. Therefore, the operation is extremely simple and the connection operation can be performed very quickly.

The fixing (removal prevention) of the connection state by the spring member cannot be said to be strong, but there is no inconvenience for use in a pipe to which no special external force is applied.
The connection can be securely fixed.

A second aspect of the present invention is the pipe separation preventing joint according to the first aspect of the present invention, wherein the sleeve is configured to extend while enlarging the end of the other pipe. The sleeve can be easily formed.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings based on embodiments. FIG.
FIG. 2 is a side sectional view of a joint of one embodiment in a connected state, FIG. 2 is a side sectional view of a joint of one embodiment in a detached state, and FIG.
2 is a sectional view taken along line AA, and FIG. 4 is a view taken along line BB in FIG.

FIG.
As shown in FIG. 4, basically, a connecting portion 2 formed by extending an end of one of the tubes 1, a flange-shaped stopper portion 3 which protrudes in a flange shape on the outer periphery of the rear end of the connecting portion 2, and The O-ring groove 4 formed in the middle of the connecting portion 2 in the longitudinal direction, the O-ring 5 inserted into the O-ring groove 4, and the rear end of the flange-shaped stopper portion 3 are loosely fitted at the rear end. A collar member 6 in which the portion 6a is loosely fitted, wherein the loosely fitted portion 6a is locked to the flange-shaped stopper member 3 so that the collar member 6 cannot further advance in the tube end direction; A sleeve 8 fixed to the end of the other tube 7; and a spring member 9 having a base 9a fixed to a step 8a provided on the outer periphery of the rear end of the sleeve 8. The four locking leaf springs 9b, 9b,... Having the locking portions 9c are once radiated outward at regular angle intervals of 90 degrees. On the, which is constituted by a spring member 9 made by extending distally of the sleeve 8.

The connecting portion 2, the flange-shaped stopper portion 3 and the O-ring groove 4 can be formed by molding an end of one tube 1. As the O-ring 5, a commonly used O-ring is used. The collar member 6 is configured such that the distal end side of the loose fitting portion 6 a has an appropriate inner diameter that can be externally provided on the sleeve 8.

The sleeve 8 is formed to have an appropriate inner diameter so as to cover the connecting portion 2 of the one tube 1. The spring member 9 has a base 9a formed in an annular shape, which is fixed to a step 8a provided on the outer periphery of the rear end of the sleeve 8 as described above and as shown in FIGS. . The locking leaf springs 9b are radiated outward from the base 9a at a constant angular interval of 90 degrees as shown in FIGS. 3 and 4, and shown in FIGS. As described above, the sleeve 8 extends in the length direction, and a locking portion 9c is formed at the distal end. The length of the locking leaf spring is
In particular, as shown in FIG.
c is determined to be an appropriate one that can be locked to the rear end of the collar member 6. Each locking portion 9c is, as shown in FIGS.
Each is folded back toward the inside.
Needless to say, the spring member 9 is made of a spring material.

Therefore, according to the pipe separation prevention joint of this embodiment, first, as shown in FIG. 2, the mutual ends of one pipe 1 and the other pipe 7 constituting this joint are faced to each other. The connecting portion 2 of one tube 1 is covered with the sleeve 8 of the other tube 7. This is done, for example, by pushing the connecting part 2 of one tube 1 into the sleeve 8 and inserting it. The insertion of the connecting portion 2 or the exterior of the sleeve 8 is performed until the end of the sleeve 8 contacts the front surface of the flange-shaped stopper portion 3.

Then, this time, as shown in FIG. 2, the collar member 6 which has been kept behind the one tube 1 is moved to the other tube 7 side, and the collar member 6 is sheathed in the connecting portion 2 and Armored sleeve 8. The movement of the collar member 6
As shown in FIG. 1, the operation is performed until the loose fitting portion 6 a at the rear end contacts the rear side of the flange-shaped stopper portion 3.

At this time, that is, when the collar member 6 is externally mounted on the sleeve 8, the base 9a is
.. Of the locking member springs 9b, 9b,... Of the spring member 9 fixed to the step 8a at the rear end. When the collar member 6 moves to the required position, the collar member 6 returns to the inside by a spring force at the rear end, and as shown in FIGS.
At the rear end.

According to the joint for preventing the detachment of tubing of this embodiment, the two pipes 1 and 7 to be connected are simply butted against each other without using a tool such as a spanner or a wrench. With the simple operation of inserting the part 2 into the other sleeve 8 and further covering the collar member 6 on the sleeve 8, the connection is established and the fixing of the connection state by the spring member 9 is also completed. Can be done. Therefore, the connection operation can be performed extremely easily and speedily.

The fixing (removal prevention) of the connection state by the spring member 9 cannot be said to be strong, but is surely performed without any inconvenience when used in piping to which no special external force is applied. The connection can be fixed.

[0024]

Therefore, according to the one pipe detachment prevention joint of the present invention, both pipes to be connected are simply butted against each other without using a tool such as a spanner or a wrench, and one of the connecting sections is connected. Can be inserted into the other sleeve, and then the collar members can be connected to each other only by a simple operation of externally covering the sleeve, and the fixing of the connected state by the spring member can also be completed,
Therefore, the operation is extremely simple and can be performed very quickly.

Although the connection member is prevented from coming off by the spring member, it cannot be said that the connection member is particularly strong. However, there is no inconvenience when the connection member is used in piping to which no special external force is applied. Can be fixed.

A second aspect of the present invention is the tubing disengagement prevention joint according to the first aspect of the present invention, wherein the sleeve is extended while enlarging the end of the other pipe. The sleeve can be easily formed.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a connection state of a joint according to an embodiment.

FIG. 2 is a side sectional view of the joint of one embodiment in a detached state.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 2;

[Explanation of symbols]

 1, 7 tube 2 connecting portion 3 flange-shaped stopper portion 4 O-ring groove 5 O-ring 6 collar member 6a loose fitting portion 8 sleeve 8a step 9 spring member 9a base 9b locking plate spring 9c locking portion

Claims (2)

[Claims] In one of the pipes to be connected, a connecting portion extending from an end thereof and an O formed on the outer periphery of the connecting portion are provided.
A groove for a ring, an O-ring inserted in the groove for the O-ring, a flange-shaped stopper formed behind the connecting portion, and an outer package detachably mounted on a sleeve described later detachably mounted on the connecting portion. A collar member to which a rear end loose fitting portion is engaged with the flange-shaped stopper portion, and a sleeve formed at the end of the other tube to be connected, wherein the one tube is And a spring member having a plurality of locking leaf springs extending in the direction of extension of the distal end from the vicinity of the rear periphery of the sleeve, the distal end of each of the locking leaf springs, A detachable joint for tubing comprising a spring member detachably engaged with a rear end of the collar member which is detachably mounted on the sleeve to prevent the collar member from coming off. 2. The detachable joint for tubing according to claim 1, wherein said sleeve is extended while enlarging an end of said other pipe.