SYSTEM AND METHOD FOR DRIVING ELEVATOR DOORS

摘要

A drive system for an elevator door includes at least two subassemblies (20, 30) and a releasable engagement device between the subassemblies. A first subassembly (20), which includes a first panel (21) affixed to a first trolley (22), moves between first and second stops (41, 44) along a track (40) that extends across a doorway (50). A second subassembly (30), which includes a second panel (31) affixed to a second trolley (32), also moves along the track (40). The releasable engagement device between the subassemblies (20, 30) includes a first engagement member (24, 60) affixed to the first trolley (22) and a second engagement member (35, 36, 70) affixed to the second trolley (32). The engagement members are configured to be coupled by a force of mutual attraction and/or mechanical interaction of such first and second engagement members when the trolleys (22, 32) are impelled against each other. The engagement members are configured to be decoupled by a force that is configured to overcome the force of mutual attraction and/or mechanical interaction.