MANHOLE HAVING TIGHTLY COUPLING STRUCTURE FOR DRAIN PIPE CONNECTER

摘要

A manhole having a coupling structure of a branch pipe with improved watertightness is provided to couple a branch pipe connector to an inlet and an outlet of a manhole simply, to improve watertightness between each branch pipe connector and a branch pipe, to produce and to construct a manhole effectively by coupling components simply and to fix a branch pipe to a branch pipe connector strongly and safely without separation. A manhole having a coupling structure of a branch pipe with improved watertightness comprises: a branch pipe connector(100) having a fixing ring(140) projected outward and coupled to an inlet and an outlet of a manhole not to be separated forward and backward and to prevent the leakage of waste water or rainwater, a coupling ring(160) projected inward and adhered closely to the outside of a branch pipe(10) to prevent the leakage of waste water or rainwater, and a clamping piece(180) widened outward and adhered closely to an inlet and an outlet of each manhole and the outside of the branch pipe to improve watertightness; a manhole(200) having an inlet and an outlet formed to couple the branch pipe connector, a fixing groove(220) formed in a ring shape to couple the fixing ring of the branch pipe connector, a hanging projection(240) formed to adhere closely to the end of the branch pipe via the branch pipe connector, a watertight projection(260) formed to adhere the clamping piece closely to the inside, and a pair of bolt coupling holes(280) formed on the outside of a flange(120) of the branch pipe connector; and a pair of branch pipe fixing members(300) fixing a branch pipe coupled to the branch pipe connector to the manhole and having bolt coupling holes(340) formed to penetrate coupling bolts(360), bolt fixing holes(320) coupled with fixing bolts(320a) and fixing nuts(320b), and skid-proof projections(380) formed on the inside to prevent the branch pipe from slipping.