SYNTHETIC RESIN CORRUGATED PIPE AND JOINT PART STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a synthetic resin corrugated pipe to simplify connection during intercoupling of pipes and prevent the occurrence of engagement between the waves of sheath pipes when the pipes are pulled one by one in a single laying space. SOLUTION: A spiral corrugated part 1a where a groove part 10 and a crest part 11 are spirally formed on an outer periphery and an independent corrugated part 1b where the groove parts 12 and the crest parts 13 are independently paralleled and alternately formed on an outer periphery are formed in a mixed state. The outside diameter of the outer periphery of each of the crest parts 13 at the independent corrugated part 1b is decreased to a value lower than the outside diameter R1 of the outer periphery of the crest part 10 of the spiral corrugated part 1a. In a joint, a packing 2 is fitted in the groove 12 of the independent corrugated part 1b of an end part, a joint sleeve 3 is mounted in a watertight state on the outer periphery thereof, and slip out of the sheath pipe 1 from the joint sleeve 3 is prevented from occurring by a slip-out protection tool 4.