| 摘要 |
A connection structure of a branch pipe is provided to prevent water leakage at a contact part between a support protrusion of a socket section and an inner diameter section of a main pipe. A connection structure of a branch pipe comprises a washer section(500), and a rubber section(410). The washer section is positioned below a screw section. An inner diameter section of a branch pipe(110) and an outer diameter section of a main pipe are in contact with the washer section. The rubber section is positioned in a support protrusion(320) of a socket section(300). A bisected molding product(400) is integrally formed with the rubber section. The socket suction moves up when a fixing nut(330) is fastened so that water leakage is prevented at a contact part between an upper portion of the support protrusion and an inner diameter section of the main pipe.
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