| 摘要 |
PROBLEM TO BE SOLVED: To provide a fireproof bimetallic tube joint for wastewater riser capable of coping with various wastewater pipeline designs, manufacturable at low cost, and installable easily. SOLUTION: This fireproof bimetallic tube joint for a wastewater riser formed by covering the outer peripheral surface of a synthetic resin inner tube with a mortar comprises a tip joint tube member 2 having, at its one end, a female type connection port in which the wastewater riser is inserted and having, at the other end, a male type connection port inserted into the other joint tube member, and having a rubber ring fitted to the female type connection port, a converging joint tube member 3 having, at its intermediate part, a female type converging connection port, formed, at its one end, in a female type connection port in which the other joint tube member is inserted, and formed, at the other end, in a male type connection port allowed to be inserted into the joint tube member, and a revolving guide joint tube member 4 having, at its one end, a female type connection port in which the other joint tube member is inserted, having, at its other end, a male type connection port allowed to be inserted into the other joint tube member, and a revolving guide joint tube member 4 having a swing guide in the inner tube. COPYRIGHT: (C)2006,JPO&NCIPI
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