管継手およびその製造方法

Pipe joint and manufacture thereof

Abstract

PROBLEM TO BE SOLVED: To attain pipe end corrosion proofing more completely by inserting a reinforcing ring consisting of a rigid material with corrosion resistance inside a resin layer, and forcing the resin layer to joint body side at the outer periphery of the reinforcing ring, in a pipe joint formed with the resin layer along a joint body inner wall surface. SOLUTION: This pipe joint 1a is provided with a joint body 2, a resin layer 3, and a resin core 4, and the joint body 2 is provided with pipe connection parts 21, 22 at both ends of it. The resin layer 3 is formed so as to cover the inner periphery surface of the joint body 2. The resin core 4, which is of a cylindrical shape so as to come into close contact with the inner periphery surface of a pipe to be connected, is formed integrally with the resin layer 3 to pipe connection part 21 side. A ring 51 consisting of a corrosion-resistant metal material is provided as a reinforcing ring 5, and is fitted in the inside of the resin layer 3 by extending its diameter mechanically after inserting it from pipe connection part 22 side, the inner periphery surface of the end part 31 of the resin layer 3 is energized to the joint body 2 side at its outer periphery surface. It is thus possible to bring the resin layer 3 into close contact with the joint body 2 completely for prevention of pipe end corrosion.
(57)【要約】 【課題】より確実な管端防食を図ることができる管継手 およびその製造方法を提供することを目的としている。 【解決手段】両端に管接続部を有する金属製の継手本体 と、管接続部を除く継手本体内壁面に沿って設けられた 樹脂層とを有し、一方の管接続部に樹脂コアが設けられ た継手の、樹脂コアが設けられていない側の樹脂層端部 で、樹脂層内側に耐蝕性を有する剛性材からなる補強リ ングをはめ込み、この補強リングの外周面を樹脂層内周 面に圧接して樹脂層と継手本体とを水密に密着させるよ うにした。

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    JP-2005240890-ASeptember 08, 2005San-Ei Faucet Mfg Co Ltd, 株式会社三栄水栓製作所樹脂パイプ用継手構造および樹脂パイプ用継手を用いた樹脂パイプ接続方法