Abstract: When a bicycle is removed, a hook is first removed from a hooking ring and a rubber string built from a rim side of a wheel is removed from the wheel. Next, the wheel is removed from the space between a first rack member and a second rack member, thereby the second rack member is automatically and forcibly folded toward a base member and the first rack member through the forcible power of a spring hinge. At that time, although the second rack member collides with the base member or the first rack member, collision shock at the time of collision is relieved by a cushion member. After the bicycle is removed, based on that a seat of a flip-up seat is moved downward, the retaining space for the bicycle can be restored to passenger's seat.

Abstract: When a bicycle is removed, a hook is first removed from a hooking ring and a rubber string built from a rim side of a wheel is removed from the wheel. Next, the wheel is removed from the space between a first rack member and a second rack member, thereby the second rack member is automatically and forcibly folded toward a base member and the first rack member through the forcible power of a spring hinge. At that time, although the second rack member collides with the base member or the first rack member, collision shock at the time of collision is relieved by a cushion member. After the bicycle is removed, based on that a seat of a flip-up seat is moved downward, the retaining space for the bicycle can be restored to passenger's seat.