BRANCH PIPE USING ELECTRO-FUSION TYPE BRANCH JOINT FOR RESIN PIPE

摘要

PROBLEM TO BE SOLVED: To bury a synthetic resin pipe in the ground more shallowly than usual without projecting an electro-fusion type branch joint made of synthetic resin from the upper surface of the buried pipe by fusing the branch joint to the side of the buried pipe except for the upper surface thereof in a vertical direction and by joining a branch pipe for piping to a place to be supplied to a branch hole. ;SOLUTION: In an electro-fusion type branch joint, the curvature of the inner peripheral surface is nearly equal to that of the synthetic resin pipe 20 to be joined and a heating wire is buried near the inner peripheral surface. The branch joint is fused to the side of a buried pipe in use except for the upper surface thereof in a vertical direction. The branch joint has a through hole 13 which is open in the center of the inner peripheral surface and doubles as a cutter drilling hole and a hole is drilled into the outer surface of the synthetic resin pipe 20 through the hole 13 and then the end of the though hole 13 is closed by a cap 14. A branch hole 15 communicating with the through hole 13 is projected in a direction parallel to the synthetic resin pipe 20. When a branch pipe 30 is made, an elbow 16 is fused to the branch hole 15, for example, to make the branch pipe 30 in a direction orthogonal to the branch hole 15 for piping to a place to be supplied.;COPYRIGHT: (C)1997,JPO