| 摘要 |
A fuel tank opening and closing device is equipped with a flap valve mechanism having an opening and closing member for opening and closing an inlet inside a tank opening forming member. The nozzle positioning guide mechanism has a first support mechanism of an opening peripheral edge of an introduction port of an insertion path of a tank opening forming member, a second support mechanism having an introduction guide surface formed on the top surface of the pressing member of the opening and closing member, and a positioning ridge line that has a curvature almost the same but slightly larger than the outer diameter of the fueling nozzle and which touches by line contact on the outer peripheral surface of the fueling nozzle at the insertion completion position, and a third support mechanism having a valve positioning member which regulates the degree of openness of the opening and closing member by touching the inner wall of the tank opening forming member.
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