SEPARATION PREVENTION STRUCTURE OF PIPE CONNECTING PART

Japanese Patent JP2019108939

A

To provide a separation prevention structure of a pipe connecting part for suppressing the leakage of fluid by maintaining a bent state between a spigot and a joint ring on one end side within a proper range while surely regulating separation movement which is equal to or larger than that at the separation of the spigot and a socket from each other.SOLUTION: A joint ring 30 having a divided structure for surrounding a fitment connecting part 20 between a spigot 1A and a socket 2A in a sealing state is externally fit over both pipe parts, separation movement prohibition means 40 for prohibiting, by abutment, a constant amount or lager of relative separation movement of the socket and the joint ring is arranged in a region in which the joint ring and the socket side relatively oppose each other, and there is arranged, at one pipe part, reinforcing fixing means 50 having a divided structure having a connecting part 52 which is fixed and connected to a pipe support part 30d on one end side in a pipe axial core direction of the joint ring which is externally fit thereto, and a withdrawal stop part 55 in which withdrawal resistance between an external peripheral face of the spigot and itself is increased accompanying the separation movement of the spigot with respect to the pipe support part on one end side of the joint ring.SELECTED DRAWING: Figure 4

JP2001241579	CONNECTION METHOD OF MECHANICAL PIPE JOINT
JP2016056840	INNER SURFACE CONNECTING COUPLER AND ITS CONNECTING METHOD

MORI MITSUHIRO
SAKAI DAISUKE
KUMAKI YOSHIHIRO

JP2017242477A

July 04, 2019

December 19, 2017

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WATERWORKS TECHNOLOGY DEV ORG
KANBE ICHI

F16L21/04; F16L21/06; F16L21/08; F16L27/12

JP2001187996A	2001-07-10
JP2016138637A	2016-08-04
JPH10122466A	1998-05-15
JP2008082418A	2008-04-10

Masahiro Miyaji

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