Patent ID: 8651597

Claim:
A retracting device, comprising: a retracting main body including a case placed on an enclosure side, a hook comprising an axis portion protruding laterally from the hook, a protrusion situated adjacent to the axis portion and protruding laterally from the hook, and a concave portion, an urging member urging the hook in a longitudinal direction of the case, a braking device, a guide groove formed in the case along the longitudinal direction of the case, and another guide groove formed in the case parallel to the guide groove, wherein the hook, the urging member and the braking device are disposed in the case; and a protruding portion placed on a moving body side, and engaging with and disengaging from the concave portion of the hook in a middle of a movement of a moving body relative to an enclosure, wherein the axis portion is held in the guide groove to slidably move therein, and the hook is switched between a retracting position allowing the moving body to move in an engaged state with the protruding portion, and a standby position prohibiting the moving body to move in a disengaged state, the protrusion is held in the another guide groove to slidably guide the protrusion therein, and switching the hook from the standby position to the retracting position, the braking device includes a piston damper having a cylinder and a piston rod, and either one of the cylinder or the piston rod is fixed in the case, and the other is slidably disposed and the hook is pivotally supported on an end side thereof, and the hook is in the standby position in which the hook is disengaged from the protruding portion in a state wherein the piston rod is entered with respect to the cylinder to reduce a protruding dimension, and is switchable to the retracting position from the standby position when the piston rod increases the protruding dimension relative to the cylinder.