Title:
DOUBLE-PIPE TYPE BURIED PIPE FOR BORING
Document Type and Number:
Japanese Patent JP3500371
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To obtain a double-pipe type buried pipe for boring by connecting a plurality of buried pipe units with high strength through simple work.
SOLUTION: This buried pipe comprises: a male pipe part 102M which is provided at an end of the buried pipe unit 10A1 and female pipe parts 102F which are provided at opposed ends of the buried pipe unit 10A2; and a plurality of tooth-shaped male protrusive strips 104M and a plurality of tooth-shaped female protrusive strips 104F, which are engaged with one another in a state in which the pipe parts 102M and 102F are fitted into each other. These protrusive stripes 104 are provided at intervals in a circumferential direction; one of the male and female protrusive strips 104 passes circumferentially between the other protrusive strips 104, so that the pipe parts 102M and 102F can be fitted into each other; and after that, the pipe parts 102M and 102F are relatively rotated so that the tooth-shaped protrusive strips 104 can be engaged with one another.
Inventors:
Kawamorita, Masaomi
Application Number:
JP2001000330597
Publication Date:
December 05, 2003
Filing Date:
October 29, 2001
Export Citation:
Assignee:
SHINNIKKO KK
International Classes:
E21B17/08; E21D9/04; F16L1/024; E21B17/02; E21D9/04; F16L1/024; (IPC1-7): E21D9/04; E21B17/08
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