JPH11153272A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel one-push joint for pipe. SOLUTION: A pipe joint is provided with a socket 10, and a small diameter stepped part 11 and a large diameter stepped part 12 where a pipe 40 is inserted in the socket 10 from a deeper part side, and a holding ring 14, a back-up ring 15, and an O-ring 16 are successively arranged in the large diameter stepped part 12 from the deeper part side, a core 30 provided with a corner part sliding inside each ring is pushed in by a tip of the pipe 40, and the length of the pipe joint is the distance where the corner part reaches the surface of an inner circumference of the O-ring 16 in the large diameter stepped part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint, and more particularly to a new one-push type joint for a pipe.

[0002]

2. Description of the Related Art In recent years, resin pipes have been widely used not only in multi-dwelling houses but also in detached houses around water, and accordingly, resin pipes are frequently connected to each other. However, it is highly demanded that these joints around water are not allowed to generate any water leakage and that the connection is simple. For this reason, many proposals have been made, but at present, no satisfactory joint has yet emerged.

Here, an example of a conventional pipe joint will be described.
An O-ring as a measure against water leakage and a retaining ring for complete connection of the pipe are inserted into a socket serving as a main body of the pipe joint, and the pipe is inserted into the socket and is clawed by the retaining ring. The outer surface is bitten and connected, and an O-ring is interposed between the outer surface of the pipe and the inner surface of the socket to prevent water leakage.

However, one cause of the water leakage is the imperfect insertion of the pipe, and there are two touches (impacts) with the hand when passing through the holding ring and the O-ring when inserting the pipe. However, an illusion that the insertion is completed by one touch is likely to occur. Therefore, it is only necessary to be able to confirm the position of the tip of the pipe, but it is not possible to do this. Even at the time of imperfect insertion, there was a small amount of water leakage at the beginning, and in some cases, this was not found in the water pressure test immediately after construction.

[0005]

SUMMARY OF THE INVENTION The present invention aims to improve the above-mentioned drawbacks of the conventional pipe joint.
The problem is to provide a new pipe joint structure in which if the pipe is incompletely inserted into the socket, a large amount of water leaks due to the water pressure test after construction, and this makes it possible to easily detect insufficient insertion. And

[0006]

According to the present invention, there is provided a pipe joint comprising:
In order to solve the above problem, the following structure is adopted. That is, a socket that allows insertion of a pipe, a small-diameter step portion and a large-diameter step portion into which the pipe is inserted from the deep side into the socket, and a holding ring, a backup ring, and an O-ring are inserted into the large-diameter step from the deep side. -A pipe joint in which rings are sequentially arranged, wherein a core having a corner which slides inside each ring is pushed in at the tip of the pipe, and the corner is formed in an O-ring in a large-diameter step portion. This is a pipe joint characterized by having a length reaching the peripheral surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe joint according to the present invention is one in which claws of a holding ring arranged in a socket bite into the outer surface of the pipe and are fixed, and in particular, a core having a corner is pushed in at the tip of the pipe. If the pushing is incomplete, the corner is in the large-diameter step, and the O-
Because it stays across the corner at the inner circumference of the ring,
A large gap is formed between the O-ring and the pipe, and as a result of the water pressure test, the degree of water leakage is large, and the insufficient insertion of the pipe can be immediately confirmed,
In this case, the pipe has to be pushed further deeper.

[0008] Therefore, unlike the conventional art, there is no longer a problem of insufficient insertion of the pipe due to a wrong feel at the time of insertion, and there is no occurrence of water leakage due to insufficient insertion of the pipe. In addition, it is preferable that a plurality of corners are provided for the core, so that the core is pressed in a well-balanced manner. Will be improved.

The sockets and caps constituting the pipe joint of the present invention are usually made of gunmetal, but may be made of a resin such as polybutene or polyvinylidene fluoride which is less thermally degraded. Although it does not matter, for example, those made of the above resin are preferable.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the pipe joint of the present invention will be described in more detail with reference to specific examples. FIG. 1 is a half cut diagram showing an example of the pipe joint of the present invention, in which the pipe is inserted halfway. Conversely, this figure shows a case where the pipe is not completely inserted. FIG. 2 is a half cut diagram when the insertion with the pipe is completed.

The socket 10 made of metal which permits the insertion of a pipe is provided with a small-diameter step portion 11 and a large-diameter step portion 12 into which the pipe is inserted from the deep side. This is a structure in which a holding ring 14 provided with 13, a backup ring 15, and an O-ring 16 are sequentially arranged, and a cap 18 is screwed into a male screw 17 engraved in the socket 10 to support them. Things.

The portion 31 is the O-ring 16 in the large-diameter step portion 12.
Is the length that reaches the inner peripheral surface of the. Incidentally, in the relationship between the retaining ring 14 and the corner portion 31 often it is given sliding the slit 14 in ₀ that constitutes the pawl 13, in the relationship between the backup ring 15 and the corner portion 31,
In some cases, a recess is provided on the inner peripheral side, and
One can slide.

When the pipe 40 with the sleeve 41 inserted into the tip is inserted into the socket 10, the core 30 is pushed into the socket 10 by the tip of the pipe 40, and the corner 31 is thereby formed. Each ring 14, 1
The insertion is completed by sliding the inside of 5 and 16. Of course, when the pipe 40 is completely inserted into the socket 10, the outer peripheral surface of the pipe 40 is bitten and fixed by the claw 13 formed inside the holding ring 14, and the backup ring 15 holds this biting. It is for. The O-ring 16 is preferably sprayed with a lubricant, for example, but is preferably coated with silicon.

The pipe joint according to the present invention has a socket 1
The claw 13 of the holding ring 14 disposed in the inner portion 0 is fixed by cutting into the outer surface of the pipe 40, and in particular, the core 30 having the corner portion 31 is pushed in at the tip of the pipe 40. If incomplete, corner 31 is sealed
Since the O-ring 16 stays on the inner periphery of the O-ring 16 with the corner 31 interposed therebetween, a large gap is formed between the O-ring 16 and the pipe 40. Is large, and the insufficient insertion of the pipe 40 can be immediately confirmed. In this case, the pipe 40 may be pushed further deeper.

Although the cap 18 is shown as being screwed into the male screw 17 of the socket 10, it is needless to say that the present invention is not limited to this.
A female screw may be provided inside the leading end and screwed to the female screw, or may be fixed with a stop ring or the like, and the fixing method is not limited.

FIGS. 3 to 5 are perspective views showing the relationship between the core and the sleeve and the pipe. Flange 41 ₁ with Sri - Bed 41 is intended to be fitted to the tip of the pipe 40, which together with the plugging in securely in the socket the tip of the pipe 40, the pawl 13 of the retaining ring 14 is securely on the outer surface of the pipe 40 This is because it is bitten and fixed.

[0017] Now, in the FIG. 3, Sri - those having a corner portion 31 substantially into the core 30 of the same diameter as the flange 41 ₁ of the probe 41, which was fitted to the tip of the pipe 40 Sri - Bed It is pushed into the deep part of the socket by 41.

In FIG. 4, the order of the sleeve 41 and the core 30 shown in FIG. 3 is changed.
This is an example in which 0 is incorporated at the tip of the pipe 40.

FIG. 5 shows a structure in which the sleeve 41 and the core 30 are integrally formed. A flange 32 is formed on the core 30 to have the same shape as the sleeve 41. The flange 32 has a corner 31. This is an example.

In the example shown in the drawings, an example is shown in which one corner 31 is provided for the core 30. However, the present invention is not limited to this, and a plurality of corners 31 may be provided.

[0021]

According to the pipe joint of the present invention, the presence of the corners provided in the core makes it possible to confirm the insufficient insertion of the pipe, and to perform more reliable construction.

[Brief description of the drawings]

FIG. 1 is a half cut diagram showing one example of a pipe joint of the present invention.

FIG. 2 is a half cut diagram when insertion with a pipe is completed.

FIG. 3 is a perspective view of a first example showing a relationship between a core, a sleeve, and a pipe.

FIG. 4 is a perspective view of a second example showing the relationship between the core, sleeve and pipe.

FIG. 5 is a perspective view of a third example showing a relationship between a core, a sleeve, and a pipe.

[Explanation of symbols]

 10 ‥‥ socket, 11 ‥‥ socket small diameter step, 12 ‥‥ socket large diameter step, 13 ‥‥ retaining ring claw, 14 ‥‥ retaining ring, 15 ‥‥ backup ring, 16 ‥‥ O-ring , 17 ‥‥ male thread engraved on the socket, 18 ‥‥ cap, 30 ‥‥ core, 31 角 core corner, 32 ‥‥ core flange, 40 ‥‥ pipe, 41 ‥‥ sleeve, 42リ Sleeve flange.

Claims (1)

[Claims] 1. A socket for allowing insertion of a pipe, a small-diameter step portion and a large-diameter step portion into which the pipe is inserted from a deep side, and a holding ring and a backup in the large-diameter step from the deep side. A pipe joint in which a ring and an O-ring are sequentially arranged, wherein a core having a corner portion that slides inside each ring is pushed in at the tip of the pipe, and the corner portion is an O in the large diameter step portion. A pipe joint characterized in that it has a length reaching the inner peripheral surface of the ring;