SEALING DEVICE FOR JACKING PIPE, AND JACKING PIPE

摘要

PROBLEM TO BE SOLVED: To provide a sealing device for a jacking pipe capable of preventing turning-up of a seal when fitted between the outer peripheral surface of a joint part of one jacking pipe body and the inner peripheral surface of a joint collar projected from the rear end of the other jacking pipe body.

SOLUTION: In this sealing device 24 for the jacking pipe, a plurality of annular lip parts 35 coming in close contact with the inner peripheral surface of a joint collar 25a of the other jacking pipe 21a are provided projecting from the outer peripheral part of an annular seal body 31 fitted and bonded to a seal groove 28 of the one jacking pipe body 22, and an annular enlarged part 36 fitted and bonded to the outer peripheral surface of the joint part 23 of the one jacking pipe body 22 is provided projecting from the tip of the seal body 31 toward the tip of the jacking pipe body 22.

COPYRIGHT: (C)2006,JPO&NCIPI