To solve the problem of occasionally losing a slipping-out preventive member of a conventional pipe connection member due to a constitution for separating from a pipe in assembling and maintenance work.
A first pipe 1 is inserted into a through-hole 3e of the pipe connection member, and a plurality of claw parts 3b are arranged in an opposed position inside an annular body 3a elastically deformable in the radial direction, and an operation part 3c arranged on the outer periphery of the annular body 3a in the orthogonal direction to a line segment of connecting the plurality of claw parts 3b. is picked in the body center direction of a pipe joining member, and locking on an engaging object part 5a engageable with the claw parts 3b of the annular body 3a is released from a second pipe 2 being a connection object by expanding a distance of the plurality of claw parts 3b, to thereby provide the constitution for preventing the loss of the pipe connection member in assembling and maintenance work of a connection part, requiring no space of the connection part periphery and not slipping out a joint part of the pipe.
SANO HIDEJI
Daisuke Nagano
Kentaro Fujii