| 摘要 |
[Problem] To provide a fuel tank check valve such that the occurrence of flap failure caused when part of a coil portion of a torsion coil spring is stuck on a stepped portion of a pivot can be prevented. [Solution] This fuel tank check valve (2) is provided with: a tubular body (6) that defines a flow path for fluid fuel; a flap (8) that is pivotally supported by a pivot (40) on the tubular body (6); and a torsion coil spring (10) that biases the flap (8) in a closing direction. The pivot (40) includes: a large diameter part (48) around which a coil portion (50) of the torsion coil spring (10) is wound; and a first small diameter part (44) and second small diameter part (46) coaxial with each other, each projecting through an axis hole (60) created in the tubular body (6) or the flap (8). The first small diameter part (44) is adjacent to the large diameter part (48) and is off-centered from the large diameter part (48) toward the side where the torsion coil spring (10) presses against the pivot (40). |
