| 摘要 |
PURPOSE:To secure replacement action and to perform the certain repairing of a pipe joint part, by parallelly providing a resin filling groove and a resin replacing groove in a phase shifted state and mounting a member for preventing groove deformation to the replacing groove. CONSTITUTION:Resin introducing grooves 17 and resin replacing grooves 18 are alternately provided to the left and right peripheral wall positions of a pig 3 in parallel in a phase shifted state and a shape holding member, which is made of a metal or hard synthetic resin having a channel shaped cross-sectional area and has large notches 43a formed at both corners thereof, is formed in the replacing groove 18. By this structure, no influence is exerted on the replacing groove even if filling pressure is applied to the resin filling groove and the expansion of the groove is generated while the opening width of the replacing groove is held to a predetermined one and the repairing of a pipe joint part is made accurate.
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