| 摘要 |
PROBLEM TO BE SOLVED: To easily perform the first installation, removal and reinstallation of a branch pipe, and completely seal a connecting part by firmly connecting them to each other by bringing an end part of a screwing-in type socket having an inserting hole of a branch pipe end part communicated with and connected to a connecting hole of a fuel distributing pipe into contact with an outer peripheral surface of the fuel distributing pipe. SOLUTION: An inside diameter of an inserting hole 15 coaxially extending with a connecting hole 5 of a screwing-in type socket 12, is set almost equal to the largest diameter of an external part 9 of the connecting hole 5 expanding in a conical shape. Therefore, a space into which a pressure contact sealing surface 16 arranged on the connecting end of a branch pipe 3 can be inserted up to an outer peripheral surface of the conical external part 9 to function as a sealing surface 18 of the connecting hole 5 from the free end of the screwing-in type socket 12, is formed in the inserting hole 15. Therefore, an injection pipe connecting nut 22 screw-fitted to a male screw formed on the free end of the screwing-in type socket 12, can be made to act on a pressure- proof surface 24 of a diametrically expansive part 25 of the branch pipe 3 by a pressure contact surface 23 of its inner wall end. |
