摘要 |
AN ELEVATOR There is disclosed an elevator comprising a hoistway (H); an elevator car (1) vertically movable in the hoistway (H); a plurality of ropes (3) connected to the car (1); a rotatable traction member (6) comprising a circumferential traction surface area for each of the several ropes (3a, 3b, 3c); each rope (3a,3b,3c) being arranged to pass around the rotatable traction member (6) resting against a circumferential traction surface area (1 la,1 lb,1 Ic) of the traction member (6); drive machinery (M) for controlling rotation of the rotatable traction member (6). The elevator comprises means for detecting displacement of each of the ropes (3a,3b,3c) over a first limit position (Lia,Llb,Lic) of the rope in the first axial direction (Xi) of the rotatable traction member (6), and over a second limit position (L2a,L2b,L2c) of the rope in the second axial direction (X2) of the traction member (6); and in that displacement of one or more of said ropes (3a,3b,3c) in axial direction of the rotatable traction member (6) over the first or second limit position (LIa,L2a;Lib,L2b;Lic,L2c) is arranged to trigger the drive machinery (M) to stop the rotation of the rotatable traction member (6). Fig. 1a Fig. 1b 63c 10, 30, 50 301 3a 3b Fig. 1c 3a 3 b 3c 2 H 1a 11b 11c Lv/I Lo X1 -------- - -- X2 -60 Fig. 2 6 63 100 7 100b 14 15, 36, 51 10, 30,0 62 [[61 - 60 |