The retaining device piping

摘要

PROBLEM TO BE SOLVED: To provide a pipe slipping-out preventive device for easily attaching-detaching a stopper without fixing by welding, and easily attaching-detaching an inner pipe and an outer pipe.;SOLUTION: This pipe slipping-out preventive device has a projection part 14 projecting outside in the radial direction of the outer pipe 12, a recessed part 32 recessed inside in the radial direction of the inner pipe 30, and a stopper 40 installed in the outer pipe 12 in response to the projection part 14. The projection part 14 has a low projection part 16, an insertion hole 18, a high projection part 24, a projection part side engaging part (an engaging hole 20), and a running-on part 22 projecting higher than the low projection part 16. The stopper 40 has the outer side 42, the inner side 52, a first engaging part (an engaging part 58) and a second engaging part (the engaging side 48). When the inner pipe 30 moves in the direction for extracting the inner pipe 30 from the outer pipe 12 in a state of sandwiching the projection part 14 by the outer side 42 and the inner side 52, the first engaging part (the engaging part 58) engages the recessed part 32 of the inner pipe 30, and the second engaging part (the engaging side 48) engages with the projection part side engaging part of the projection part 14, to thereby check extraction.;COPYRIGHT: (C)2010,JPO&INPIT