Patent ID: 6089778
Filing Date: 2000-07-18
Classification: G09F,Y10T

Abstract:
A joint, in which a plurality of synthetic resin hollow tubes are inserted which are a plurality of resin-coated steel pipes which are formed by applying a coating resin on a surface of a thin wall steel pipe and are formed with at least one pair of fitting ribs extending in an axial direction on said coating resin for holding an edge of a partitioning body, in order to connect said resin-coated steel pipes in an intersecting fashion, comprising a combination of said joint and said resin- coated steel pipes;said joint having slits, permitting a pair of fitting ribs of said resin-coated steel pipes to pass therethrough, and formed on reentrant side of at least adjacent two hollow tubes among a plurality of hollow tubes at positions in one plane extending across respective axes of said hollow tubes and extending over the entire length;said joint having covering ribs formed integrally with said hollow tubes and extending along both sides of the entire length of said slits for covering outer side surfaces of a pair of fitting ribs of said resin-coated steel pipe; anda small diameter portion is formed on an intersecting portion side of one of said adjacent hollow tubes with locating a stepped shoulder portion corresponding to a tip end portion of said covering rib of the other hollow tube, an auxiliary rib formed by extending a pair of covering ribs of said other hollow tube is extended at least to the center portion and one of said auxiliary ribs is connected to a reinforcement plate on an opening end side, anda tip end portion of said covering rib is formed with a covering portion covering the tip end face of said fitting ribs of said resin-coated steel pipe.