| 摘要 |
The fueling device includes a casing main body with an inlet opening. The casing main body is mountable in the fuel passage of the fuel filler pipe. A cap main body for opening and closing the inlet opening is engageable with the casing main body. A shutter is disposed in the fuel passage on the fuel tank side and is urged closed by a biasing member. A seal ring is mounted on the shutter, which is seated on a seat surface of the casing main body so as to seal the interior of the fuel tank in an air-tight manner against the outside by compression of the seal ring between the shutter and the seat surface. Engagement catches that fasten the cap main body to the casing main body operate to connect the cap main body and the shutter in such a manner that rotational force of the cap main body is converted into force in the direction in which the seal component is pressed to the seat surface to compress the sealing ring therebetween.
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