DERAILMENT PREVENTING DEVICE OF ELEVATOR COUNTERWEIGHT

PROBLEM TO BE SOLVED: To provide a counterweight's derailment preventing device that is able to prevent interference with a fastener or the like for locking a guide rail, and also to reduce the cost of production, and besides, it is applicable even in the case where individual sizes of the guide rail are varied. SOLUTION: This derailment preventing device consists of a pair of supporting members 11 being formed into a nearly C-shaped form, and their one end is attached to a frame body 3, and another pair of engaging members 12 being supported by the paired supporting members 11, and coming into slidingly contact with the backside of a pair of guide rails 1, in this constitution, this supporting member 11 is equipped with a nearly L-shaped fixed body 14 whose one side 14a is locked to the frame body 3, and a nearly L-shaped movable body 15 shiftably installed in this fixed body 14, respectively. In the case where a fastener securing the guide rail 1 is situated in the vicinity of a counterweight, the paired supporting members 11 are set up at the opposite side of this fastener with the counterweight as the border, and the movable body 15 is displaced in a direction orthogonal to the back face of the guide rail 1 according to each size of the rail 1.