Tokyo Metropolitan Government

Taisei Kiko Co., Ltd.

Fumiyoshi Miyazaki

Mitsuhiro Mori

Go Horikawa

Go Waterworks Technology Development Org Horikawa

A lock member capable of contacting an engaging projection of an inserted pipe section from a direction of the pipe axis and relatively rotatably attachable between an annular wall portion of a receiving pipe section and the engaging projection of the inserted pipe section includes engaging stopper portions projecting therefrom for contacting an inward surface of the annular wall portion from the direction of the pipe axis. The annular wall portion has attachment/detachment recesses formed therein for allowing inserting and removing movements of the engaging stopper portions in the direction of the pipe axis. An elastic urging member is provided between an extending portion projecting from the lock member to the outside of the pipe through an inner peripheral surface of the annular wall portion and the outer peripheral surface of the inserted pipe section, and an outward surface of the annular wall portion.

Pipe joint construction

A pipe joint construction comprising an elastic seal member () for hermetically sealing between an inner circumferential surface of a receiving pipe section () and an outer circumferential surface of an inserted pipe section () inserted into and connected to the receiving pipe section in a pipe axis direction (X), and a lock member () provided in the inner circumferential surface of the receiving pipe section () adjacent a receiving opening thereof for preventing separation of the pipe sections by contacting an engaging projection () protruding from the outer circumferential surface of the inserted pipe section () in the pipe axis direction, wherein the construction further comprises an attachment/detachment control device (A) for attaching and detaching the lock member () to/from the receiving pipe section () by rotating the lock member () about the pipe axis direction (X) relative to the receiving pipe section () and by moving, in the pipe axis direction (X), the lock member () placed in a specific position in a passage of rotation.

Growing community of inventors

Toride, Japan

Fumiyoshi Miyazaki