JPH0681990A - Tube joint - Google Patents

Abstract

PURPOSE:To perform connection through one action and to perform reliable connection by locking the resilient lock part of a spring ring to the lock groove part of a plug inserted in a socket and bringing a lock tool into its locking impossibility in an incomplete connection state. CONSTITUTION:In connection of a plug 1 to a socket 2, a lock groove 5 formed in the rear part of the plug 1 is first inserted in the socket 2. A U-shaped spring ring 7 is then inserted in the cut groove 6 formed in the wall part of the socket 2 and openable to the inside and the outside. Consecutively, the part, inserted in the cut groove 6, of the spring ring 7 is protruded in the socket 2 to form a resilient lock part 8. Only is a state that the resilient lock part 8 is locked to a lock groove part 5, a lock tool 30 is joined in a screwed-in state with the screw part 36 of the socket 2. This constitution enables connection to be corried out through one action, makes the lock tool 30 impossible to act its locking a peration to under any incomplete connection state, and accomplishes reliable connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for connecting water pipes in a vanity or sink.

[0002]

2. Description of the Related Art Conventionally, copper pipes are often used as water pipes in vanities and sinks. As the pipe joint at that time, a pipe is inserted into the pipe joint as shown in FIG. The structure is such that a cap nut 41 is screwed onto the outer periphery of the joint body 40, and a packing 42 and a washer 4 are provided inside.
3. A pipe fixing ring 45 having an inner diameter slightly larger than the outer diameter of the pipe 44 is arranged. The pipe 44 is inserted into the joint body 40 and the cap nut 41 is tightened to move the packing 42 toward the center of the pipe 44. The pipe 44 is fixed by pressing the pipe fixing ring 45 toward the center at the same time as bulging to seal.

[0003]

However, in the above-mentioned conventional example, it is necessary to tighten the cap nut 41 with a tool, but since the working place is inside the vanity or sink, there is a sufficient working space. There was a problem that it was not easy to remove, it was very difficult to do, and it took time to work.

The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is that the connection can be made by one touch with a simple structure, and the work is easy and requires a long working time. In addition, it is to provide a pipe joint that can be surely connected despite the one-touch connection.

[0005]

In order to solve the problems of the above-mentioned conventional examples and to achieve the object of the present invention, in the pipe joint of the present invention, a tubular plug 1 is fitted in a tubular socket 2. In a pipe joint to be connected, a locking groove portion 5 is provided at a rear portion of a tubular plug 1, and a socket 2 is provided at a wall portion of the tubular socket 2.
Is provided with a kerf 6 that opens inside and outside, and a substantially U-shaped spring ring 7 that is inserted into the kerf 6 from the outside of the socket 2 straddling the socket 2 is provided in the kerf 6 of the spring ring 7. The inserted portion is made to project from the cut groove 6 into the socket 2 to form the elastic locking portion 8, and the elastic locking portion 8 of the spring ring 7 is locked to the locking groove portion 5 of the plug 1 inserted in the socket 2. When the plug 1 is fitted in the socket 2 and the elastic locking portion 8 of the spring ring 7 is locked in the locking groove portion 5 of the plug 1, the plug 1 is engageable and the plug 1 is fitted in the socket 2 and the spring ring is engaged. The elastic locking portion 8 of the plug 7 is provided with a locking tool 30 that cannot be engaged with the plug 2 when the plug 1 is shallowly fitted into the socket 2 so that the elastic locking portion 8 cannot be locked in the locking groove portion 5 of the plug 1.

[0006]

According to the present invention having the above-described structure, the locking groove 5 is provided in the rear portion of the cylindrical plug 1 and the wall of the cylindrical socket 2 is opened inside and outside the socket 2. A cut groove 6 is provided, and a substantially U-shaped spring ring 7 that is inserted into the cut groove 6 from the outside of the socket 2 is provided, and a portion of the spring ring 7 inserted into the cut groove 6 is provided. The elastic locking portion 8 is made to protrude from the cut groove 6 into the socket 2
Since the elastic locking portion 8 of the spring ring 7 is locked in the locking groove portion 5 of the plug 1 inserted into the socket 2, when the plug 1 is inserted into the socket 2, the elasticity of the spring ring 7 is reduced. The plug 1 is fitted into the socket 2 while pushing the locking portion 8 open, and when the elastic locking portion 8 reaches the locking groove portion 5, the elastic locking portion 8 elastically locks in the locking groove portion 5. Connection is made. Further, according to the present invention, when such a one-touch connection is made, the cut groove 6 is formed in the cylindrical socket 2 and the spring ring 7 is inserted from the outside of the socket 2, so that the assembly can be easily configured. It has become. In addition, the plug 1 is fitted in the socket 2 so that the elastic locking portion 8 of the spring ring 7 is locked in the locking groove portion 5 of the plug 1 even though the connection is easily made with one touch. With a shallow fitting depth of the plug 1 into the socket 2, the plug 1 can be engaged with the socket 2 and the elastic locking portion 8 of the spring ring 7 cannot be locked in the locking groove portion 5 of the plug 1. Since the engagement tool 30 that cannot be engaged is provided, in the event that the plug 1 is not deeply inserted until the elastic engagement portion 8 of the spring ring 7 is engaged with the engagement groove portion 5 of the plug 1, the engagement is performed. The stopper 30 cannot be locked, and it can be easily confirmed that the elastic locking portion 8 of the spring ring 7 is not locked in the locking groove portion 5 of the plug 1.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. As shown in FIG. 1, a tubular plug 1 is connected to an end of a flexible pipe 12 made of copper. As shown in FIGS. 1, 2, and 5, the cylindrical plug 1 has a small-diameter portion 13 having a non-tapered tip portion.
A guide taper portion 4 whose diameter increases toward the rear side is provided at the rear portion, and a locking groove portion 5 is provided around the rear portion of the guide taper portion 4 of the plug 1. A protrusion 31 is provided on the outer surface of the rear portion of the plug 1, and a locking tool 30 is movably fitted on the flexible pipe 12 side of the protrusion 31. The locking tool 30 is formed by providing an insertion hole 34 in a rear wall 35 of a rotary cylinder 33 having an internal thread portion 32 on its inner peripheral surface. When the rotary cylinder 33 is moved forward, the protrusion 31 is formed.
The rear wall 35 hits against and moves further forward so that it cannot be pulled out.

As shown in FIGS. 2 and 6, the cylindrical socket 2 has a male screw portion 14 engraved on the outer periphery of the front portion, and the inner peripheral portion of the rear portion has a small diameter hole portion 15 and a small diameter hole portion. The rear part of the hole 15 is larger than the hole 15. A groove 18 is provided in the inner peripheral portion of the small diameter hole portion 15, and an O-ring 19 is formed in the groove 18.
It is inset. Then, on both sides of the wall portion of the cylindrical socket 2, cut grooves 6 that open to the inside and the outside of the socket 2 are provided, and the cut grooves 6 open inside the socket 2 at the large-diameter hole portion 16 portion. . And the kerf 6 is shown in FIG.
As shown in FIG. 5, the cylindrical socket 2 is notched long in the direction orthogonal to the axial direction. Then, the socket 2 having the above structure
Is connected to other tubing. A male screw portion 36 is provided on the outer periphery of the rear end portion of the socket 2, and this male screw portion 36 serves as an engaging portion 37.

As shown in FIG. 1, the spring ring 7 is formed by bending a wire material having elasticity into a substantially U shape, and has a base portion 11
The leg portions 9 are formed so as to extend from both end portions of the base portion 11 at substantially right angles to the base portion 11, and each leg portion 9 has an arc shape in which opposing portions of the opposing leg portions 9 are concave. An elastic locking portion 8 is provided. The tip portions of both leg portions 9 are bent inward in a substantially V shape, and the tip bending portion 1
7, the bending corners of the tip bending part 17 are close to each other, and the distance between the bending corners of the tip bending part 17 is shorter than the distance between the kerfs 6. The spring ring 7 having such a shape is to be inserted into the cut groove 6 from the outside of the socket 2 while straddling the socket 2.
The elastic locking portion 8 of the above is inserted into the inside of the socket 2 through the cut groove 6. Further, the spring ring 7 has a base portion 11 and a leg portion 9
The configuration is such that it is bent in a substantially U-shape in a direction substantially perpendicular to.

When connecting the plug 1 and the socket 2, the plug 1 is inserted into the socket 2,
In this case, the plug 1 is fitted into the socket 2 while being pushed open by the elastic taper portion 8 of the spring ring 7 while being guided by the guide taper portion 4, and when the elastic taper portion 8 reaches the locking groove portion 5. As shown in FIG. 2, the elastic locking portion 8 is elastically locked in the locking groove portion 5 for connection. Further, in this state, the small diameter portion 13 at the tip of the plug 1 is fitted into the small diameter hole portion 15 of the socket 2 and the O-ring 19 is provided at the small diameter portion 1.
The outer periphery of 3 is elastically intimately adhered to provide a seal. By the way, in this case, when the plug 1 is not completely fitted in the socket 2 and the fitting depth is shallow, the elastic locking portion 8 is not elastically locked in the locking groove portion 5. However, the elastic locking portion 8 is locked from the outside by the locking groove portion 5.
It is not possible to confirm whether or not it is elastically locked to the, and if the elastic locking portion 8 is not elastically locked to the locking groove portion 5, a poor connection will result. In the state where the plug 1 is fitted in the socket 2 and the elastic locking portion 8 of the spring ring 7 is locked in the locking groove portion 5 of the plug 1, the plug 1 is fitted in the socket 2 and the spring is engaged. Since the elastic locking portion 8 of the ring 7 cannot be locked in the locking groove portion 5 of the plug 1 by providing the locking tool 30 which cannot be engaged with the socket 2 in the shallow fitting depth of the plug 1,
If the plug 1 is not inserted deeply until the elastic locking portion 8 of the spring ring 7 is locked in the locking groove portion 5 of the plug 1, the locking tool 30 cannot be locked and the spring ring 7 It can be easily confirmed that the elastic locking portion 8 is not locked in the locking groove portion 5 of the plug 1. That is, in the embodiment shown in FIGS. 1, 2, and 3, the engagement is not performed until the elastic engagement portion 8 of the spring ring 7 is elastically engaged with the engagement groove portion 5 of the plug 1 at the insertion depth of the plug 1. The stopper 30 is moved forward so that the female screw portion 32 can be screwed into the female screw portion 36 of the socket 2. Thus, the locking tool 30 is the engaging portion 37 and the female screw portion 36 of the socket 2. It can be confirmed that the elastic locking portion 8 of the spring ring 7 is elastically locked in the locking groove portion 5 of the plug 1 as shown in FIG. When 30 cannot be engaged by being screwed into the female screw portion 36 of the socket 2 which is the engaging portion 37,
As shown in FIG. 3, it can be seen that the elastic locking portion 8 of the spring ring 7 is not locked in the locking groove portion 5 of the plug 1, and the operator understands that the plug 12 needs to be pushed all the way in again. To be done.

On the other hand, when the plug 1 is detached from the socket 2, the engagement by the locking tool 30 is released, and the base portion 11 which is one end portion of the spring ring 7 is further removed with a tool such as fingers, pliers or pliers. pull. Then, the bent corner of the tip bent portion 17 at the tip of both legs 9 of the spring ring 7 rides on the edge of the lower end of the kerf 6, and the both legs 9 spread, whereby the elastic locking portion 8 is locked. Since it is disengaged from the groove 5, the plug 1 can be easily pulled out from the socket 2 by pulling out the plug 1 in this state. In this case, the spring ring 7 may be pulled out completely.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the locking tool 30 is formed by forming an insertion hole 40 in the rear wall 39 of the tubular body 38, and the tubular body 38 is formed.
When is moved forward, the rear wall 35 hits the projection 31 and moves further forward so as not to come off. The engagement claw 41 is projected from the front end of the tubular body 38. On the other hand, an engaging groove 42 is provided on the outer surface of the rear end portion of the socket 2, and the engaging groove 42 serves as the engaging portion 37. Then, the locking tool 30 is moved forward only at the insertion depth of the plug 1 where the elastic locking portion 8 of the spring ring 7 is elastically locked in the locking groove portion 5 of the plug 1 to move the locking claw portion 41. Is set so that it can be screwed into the engagement groove 42 of the socket 2.

In any of the above-mentioned embodiments, the rotary cylinder 33 or the cylindrical body 38 serves as a cap for covering the connecting portion between the plug 1 and the socket 2.

[0014]

As described above, according to the present invention, the locking groove is provided in the rear portion of the cylindrical plug, and the wall of the cylindrical socket is provided with the cut groove that opens inside and outside the socket. A substantially U-shaped spring ring that is inserted into the cut groove from the outside of the socket across the socket is provided, and the portion of the spring ring inserted into the cut groove is inserted into the socket from the cut groove and elastically locked. Since the elastic locking part of the spring ring is locked in the locking groove part of the plug inserted in the socket, the elastic locking part is elastic in the locking groove part just by inserting the plug in the socket. The connection is made by locking to, and one-touch connection is possible. Moreover, such a structure for one-touch connection is a structure in which the groove is formed in the cylindrical socket and the spring ring is inserted from the outside of the socket, and the structure is simple and the assembly is simplified. Is. Also, it can be engaged when the plug is fitted in the socket and the elastic locking part of the spring ring is locked in the locking groove part of the plug. Since there is a locking tool that cannot be engaged at a shallow fitting depth of the plug into the socket that cannot be locked in the locking groove, the elastic locking part of the spring ring should be locked in the locking groove of the plug. If the plug is not inserted deeply until it is inserted, the locking tool cannot be locked and it is easy to confirm that the elastic locking part of the spring ring is not locked in the locking groove part of the plug. As a result, the plug can be reliably connected to the socket.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a drawing showing a connection state between the plug and the socket of the same, in which (a) is a partially cutaway front view showing the connection state and (b) is a side view showing the connection state of the same.

FIG. 3 is a partially cutaway front view showing a connection failure state of the above.

FIG. 4 is a partially cutaway front view showing another embodiment of the above.

FIG. 5 is a partially cutaway front view of the above plug.

FIG. 6 is a drawing showing the socket of the same, in which (a) is a partially broken front view and (b) is a side view.

FIG. 7 is a partially cutaway front view of a locking tool used in the above.

FIG. 8 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug 2 Socket 4 Guide taper part 5 Locking groove part 6 Cutting groove 7 Spring ring 8 Elastic locking part 9 Leg part 11 Base part 30 Locking tool

Claims (1)

[Claims] 1. A pipe joint in which a tubular plug is fitted into a tubular socket for connection, wherein a locking groove portion is provided at a rear portion of the tubular plug, and a wall portion of the tubular socket opens inside and outside the socket. Is provided, and a substantially U-shaped spring ring that is inserted into the cut groove across the socket from the outside of the socket is provided, and the portion inserted into the cut groove of the spring ring is inserted from the cut groove to the inside of the socket. The elastic locking part of the spring ring is inserted into the socket, and the elastic locking part of the spring ring is locked in the locking groove part of the plug inserted into the socket. It can be engaged in the state of being locked in the stop groove, and with a shallow fitting depth of the plug into the socket where the elastic locking part of the spring ring cannot be locked in the locking groove of the plug by fitting the plug into the socket. Unengageable A pipe joint provided with a locking tool.