ユニオンナット管継手の管離脱防止装置

Japanese Patent JP7283837

B2

Provided is a pipe detachment preventing device for a union nut pipe fitting that can keep a temporarily-assembled state and enables tightening work to be performed uniformly, while having a simple structure. A protruding portion has at least a flange portion 75 having a through hole 76 through which tightening means penetrates, and a wall portion 77 extending from the flange portion 75. An end portion 77a of the wall portion 77 opposed to another divisional component is formed so as to protrude toward the other divisional component relative to an end portion 73a of an arm 73 and a hook 72 opposed to the other divisional component. A retaining ring 7 has a compressively-deformable held member 8 through which the tightening means is inserted and which is held between the flange portions 75 opposed to each other. The compressively-deformable held member 8 forms a gap S between the end portions 77a of the wall portions 77 when a pair of divisional components are coupled by the tightening means and latched to a union nut 4 in a loose-fit state. The tightening means is tightened until the end portions 77a of the wall portions 77 come into contact with each other, thus tightening and fixing the pair of divisional components to an outer-peripheral surface of a pipe.

Hideto Kawanishi
Akira Tsurumi

JP2022573565A

May 30, 2023

December 24, 2021

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Kawanishi Water Works Co., Ltd.

F16L19/03; F16L21/04; F16L21/08

JP2013204736A
JP2007537414A
JP58005585A
JP2015158273A

US4966395
US20190086006

Koji Kitamura
Toshio Takao

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