| 主权项 |
1. A fuel tank opening-closing device that opens and closes a fuel passage for supplying fuel discharged by a fueling nozzle to a fuel tank, the fuel tank opening-closing device comprising:
a tank opening-forming member that includes (i) the fuel passage, a cover member extending around a periphery of the fuel passage, (ii) a first opening-forming member disposed in the fuel passage and having a first opening, and (iii) a second opening-forming member disposed inside the fuel passage and below the first opening-forming member, and the second opening-forming member having a second opening, a first flap valve mechanism that includes a first opening-closing member for opening and closing the first opening, and a second flap valve mechanism that includes (i) a second opening-closing member for opening and closing the second opening and (ii) a gasket that seals between the second opening and the second opening-closing member, wherein the tank opening-forming member includes: an insertion passage forming member including (i) a passage forming main body forming an insertion passage that connects the first opening and the second opening together for guiding the fueling nozzle from the first opening to the second opening, and (ii) the insertion passage forming member including a vent hole formed in the passage forming main body, and the vent hole is formed in the insertion passage forming member adjacent the first flap valve mechanism, a vent forming member forming a gap between the cover member and the insertion passage forming member and extending along an outer periphery of the insertion passage forming member and disposed facing the vent hole, a vent passage connecting the insertion passage with the outside through the gap and the vent hole, the vent passage including an annular passage and a side wall, the annular passage being formed between the side wall and the second opening-forming member, and the side wall covering an outer peripheral part of the insertion passage, and the vent passage including a maze of interconnected pathways, wherein the fuel passage includes a pipe main body extending downward from the second opening-forming member, a gap passage is formed between an outer face of the pipe main body and the side wall adjacent an opening side of the second flap valve mechanism, and the vent hole is formed on an opposite side of the gap passage relative to a center axis of the fuel passage. |
