WARNING SYSTEM FOR MECHANICS IN ELEVATOR HOISTWAYS

摘要

A warning system for mechanics working in elevator hoistways (HW1 , HW2, HW3, HWN) detects elevator cab position within the hoistway and senses the presence of a mechanic on the top of an elevator cab (12) or in the pit at the bottom of the hoistway or overhead at the top. A mechanic whose presence has been sensed will receive a voice-based warning message of approaching danger. The verbal content of the warning message is based on positions of the cab (12) in the hoistway (HW1 , HW2, HW3, HWN), as well as cab position within adjacent hoistways, so that the mechanic can notice approaching danger caused by a moving cab (12) or counterweight (16).