JP2002168389A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin saddle joint in which an insert part is hard to separate from a resin part even when bending force is applied to an inserted metal connecting member. SOLUTION: A flange part 16 is formed to the insert part to the resin part of the metal connecting member 1, a dovetail groove-like recess 21 is formed at the flange part 16, and a through hole 22 communicating with inside and outside is formed to a side surface of the recess.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a metal pipe, a water faucet,
The present invention relates to a metal fitting or other metal connecting member for connecting a metal part or a resin pipe fitting into which the above metal part itself is inserted.

[0002]

2. Description of the Related Art In recent years, resin pipes having excellent lightness and flexibility have become widespread in the fields of water and sewage pipes, gas pipes, hot water supply pipes, sprinkler pipes, and the like.
A metal pipe is also used, and a metal part such as a water faucet may be incorporated in the pipe.

[0003] In order to connect a resin pipe to a metal pipe or a metal part, a pipe joint for that purpose is required. Conventionally, such a pipe joint is provided with an external thread or an internal thread, and is provided with a metal pipe, a water pipe, a metal joint, and the like. 2. Description of the Related Art A resin pipe joint in which a metal connecting member for connecting a metal part is inserted has been used.

Since metal and resin are inherently difficult to bond,
In order to prevent the metal connecting member from peeling off from the resin-made pipe joint, there is known a metal connecting member provided with a recess or a convex portion into which the resin enters, and a portion of the metal connecting member inserted into the resin. Are also known (Japanese Utility Model Laid-Open No. 2-22491, 4-138193).
issue).

FIG. 1 shows an example of a resin saddle joint 2 in which a metal connecting member 1 is inserted. An inner screw 3 is cut in the metal connecting member 1 and a concave portion 4 is formed in a connecting portion with the resin. Are formed. FIG. 2 shows an example in which a through hole 8 is formed in an insert portion 6a of the metal connecting member 6 into the resin portion 7.

[0006]

In the saddle joint shown in FIG. 1, when a bending force is applied to the metal connecting member 1, for example, in a direction indicated by an arrow in FIG. The portion having the concave portion 4 of the member 1 is separated from the resin portion having the flange portion 5 which has entered the concave portion 4 and the metallic connecting member 1
May come off from the resin part.

In the example shown in FIG. 2, the metal connecting member 6 has an effect of preventing the metal connecting member 6 from rotating or detaching from the resin portion 7.
The resin portion 7b in the through-hole receives a shearing force acting when a tensile force is applied in the direction of the arrow in FIG. 2 so that the metal connecting member 6 is broken by the resin portion 7b. There is a risk of escape. SUMMARY OF THE INVENTION An object of the present invention is to provide a resin-made pipe joint that can prevent a metal connecting member inserted from coming off.

[0008]

The invention according to claim 1 is a resin pipe joint in which a metal connecting member for connecting a metal pipe, a water faucet or other metal parts or a metal part itself is inserted. It is characterized in that a dovetail-shaped concave portion is formed in an insert portion of a resin-made connecting member or a metal component into a resin.

The operation of the present invention will be described with reference to FIG. 4 corresponding to FIG. 3. FIG. 4 shows that a dovetail-shaped recess 13 is formed at a proper position of a metal member 12 inserted into a resin portion 11,
Although resin is introduced into the recess 13, even when a bending force is applied in the direction indicated by the arrow as shown in FIG. 1, the recess 13 has a dovetail shape as shown in FIG. 3. It does not come off from the flange portion 14 of the resin portion.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, a hole is formed in the metal part inserted into the resin so as to communicate inside and outside. According to the present invention, it is possible to further enhance the effect of preventing the metal connecting member from coming off from the resin portion.

According to a third aspect of the invention, there is provided a resin pipe joint in which a metal connecting member for connecting a metal pipe, a water faucet or other metal parts or a metal part itself is inserted. A metal connection member or a metal component is provided with a flange formed in a direction intersecting the direction in which the metal component is pulled out, and the flange is formed with a through hole in the drawing direction, and the hole is filled with resin. It is characterized by having.

The operation of the present invention will be described with reference to FIG. 5. When a tensile force is applied in the direction of the arrow, the flange portion 16 is dispersed into the force pressing the resin portion 17 and the shearing force at the portion a, and the through hole 18 The burden on the resin inside is reduced. Each of the above-mentioned inventions is not limited to the saddle joint as shown in FIG. 1 and can be applied to other joints in general.

[0013]

FIG. 6 shows an example in which the present invention is applied to the saddle joint shown in FIG. 1. The concave portion 21 formed in the insert portion of the metal connecting member 1 into the resin has a dovetail shape. And a through-hole 22 communicating inward and outward on the side surface of the concave portion. A heating wire (not shown) is buried in the resin-made saddle portion 23 on the contact surface with the resin tube, and Are to be electrofused.

According to this embodiment, a dovetail-shaped recess 21 is provided.
The through-hole 22 prevents the metal connecting member 1 from being detached from the resin portion even when a bending force is applied to the metal connecting member 1 in the direction indicated by the arrow in FIG.
The resin in the through hole is integrated with the resin in the other portions, so that the retaining effect is further enhanced and the rotation is stopped. The dovetail-shaped concave portion 21 and the through hole 22 are simply formed in the metal connecting member 1. By simply forming the metal connection member, the metal connection member is easily processed because the shape is not complicated.

The above embodiment shows an example in which the present invention is applied to a saddle joint. In another embodiment, a socket joint in which a metal part such as a metal connecting member or a water faucet is inserted, and other various joints are shown. Applied to

[0016]

According to the first aspect of the present invention, even when a bending force is applied to a metal connecting member or a metal component inserted into a resin joint, separation from the resin portion is prevented,
It can be used for retaining. According to the second aspect of the present invention, the retaining can be more reliably performed.
According to the third aspect of the present invention, the load on the resin in the through hole when pulling out the metal connecting member or the metal part is reduced, and breakage due to the pulling force can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional saddle joint in which a metal connecting member is inserted.

FIG. 2 is a sectional view of a conventional example in which a metal connecting member is inserted.

FIG. 3 is a schematic view of an insert portion when a bending force is applied to a metal connecting member.

FIG. 4 is a schematic view of an insert portion according to the present invention when a bending force is applied to a metal connecting member.

FIG. 5 is a cross-sectional view in which a through hole is formed in an insert portion.

FIG. 6 is a cross-sectional view of a saddle joint according to the present invention in which a metal connecting member is inserted.

[Explanation of symbols]

 1, 6, metal connection member 2, saddle joint 3, internal screw 4, recess 5, 14, 16, flange 7, resin joint 7a, insert part 7b, 17, resin part 8, through hole 11, resin part 12, metal part 13, 21, dovetail-shaped concave part 18, 22, through hole 23, saddle part

Claims (3)

[Claims] 1. A resin pipe joint in which a metal connecting member or a metal part itself for connecting a metal pipe, a water faucet or other metal parts is inserted, wherein the metal connecting member or the resin of the metal part is inserted. A pipe joint characterized in that a dovetail-shaped concave portion is formed in an insert portion of the pipe joint. 2. The pipe joint according to claim 1, wherein a hole communicating with the inside and outside is formed in a metal portion inserted into the resin. 3. A resin pipe joint in which a metal connecting member or a metal part itself for connecting a metal pipe, a water faucet or other metal parts is inserted. A flange formed in a direction intersecting with the direction in which the connecting member or the metal component is pulled out is provided, and a through-hole in the pulling-out direction is formed in the flange, and the hole is filled with resin. Pipe fittings.