| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent fuel from permeating through a resin member in an opening part, relating to a fuel tank formed of a resin member having a plurality of layers. SOLUTION: A fuel tank main unit 1 is formed by blow molding a resin member having a plurality of layers, and an opening part 1h is integrally formed. A tubular part 1e extended outward the fuel tank main unit in the opening part and an overlapped part 1d extending a bending part 1b in a direction diametrically spreading the opening part from a tip end of this tubular part to have an external surface in parallel to an opening surface of the opening part are formed. A compression part 1c is formed by compressing partly the overlapped part 1d. This compression part 1c, by generating a smooth surface while thickness of the resin member is thinned by compression, can ensure good seal performance. In addition, in the case that the compression part 1c constitutes an annular groove, a seal member 3 can be arranged. |
