The deviation from cord position detection display null in conveyance

摘要

PURPOSE:To speedily grasp the degree of trouble of a lift device by installing a slip-off detecting means which outputs the response pulse into a network circuit according to the operation state of a slip-off detector installed at each supporting position of a cable and permitting the slip-off position and the number of slip-off to be displayed on a monitor panel. CONSTITUTION:Each slip-off detecting means 7 for detecting the slip-off in a pulley device is constituted of a slip-off detector 11 installed at each supporting position of a cable, and a slip-off signal output device 12 which outputs the response pulse into a network circuit 10 according to the detection signal. Each output device 12 is constituted of a response timing judging part 13 which judges the response timing for the existence of slip-off and an output part 14 which receives the judgement signal and outputs the response pulse. While, a slip-off detection control means 8 which outputs the pulse signal into the network circuit 10 is constituted of a sending-out part 15 which calls the output device 12, network signal read-out part 16 which receives the response pulse and reads out the existence of the slip-off, and an anomaly judging part 17 which judges the existence of slip-off and a slip-off position, and the result of the judgement is displayed on a display means 9.