Patent ID: 9102228
Filing Date: 2015-08-11
Classification: B60K,Y10T

Abstract:
1. A fuel-filling aperture opening-closing device provided in one end of a filler pipe communicating with a fuel tank, comprising: a tube member internally forming a pathway, and connected to one end of the filler pipe; a first flap valve device provided inside the pathway, and opening a first valve by pressing a fuel-filling nozzle inserted from an outer end side of the pathway, the first flap valve device having a first torsion spring urging the first valve so as to close the first valve; and a second flap valve device provided on the outer end side more than the first flap valve device inside the pathway, and opening a second valve by pressing the fuel-filling nozzle inserted from the outer end side of the pathway so as to allow the fuel-filling nozzle to pass through, the second flap valve device having a second torsion spring urging the second valve so as to close the second valve, wherein the first torsion spring has a first predetermined spring constant, the second torsion spring has a second predetermined spring constant, the first predetermined spring constant and the second predetermined spring constant are adjusted such that the first flap valve device opens by a load smaller than that of the second flap valve device, the first flap valve device and the second flap valve device are disposed closely in an axis line direction of the pathway within a range not disturbing a valve-opening movement and a valve-closing movement, the first flap valve device further includes: the first valve comprises a seal member on a peripheral edge thereof, a first circular plate on a side facing the second flap type valve device, and a second circular plate mutually overlapping with the first circular plate, the first circular plate has a concave surface which increases a thickness towards outer end sides thereof, and the second valve does not have any seal member.