Prevent taking off formula elevator with door sword device

The utility model relates to a prevent taking off formula elevator with door sword device. Present door sword device need come the switch latch hook through the sedan -chair door for the sedan -chair door does not lock the function. The utility model discloses a door knife tackle spare, door knife tackle spare include bottom plate, first connecting rod, latch hook and establish the hasp, receive a quick -witted belt gearing's first connecting rod preventing taking off switching between station and unblock station through transform structure realization latch hook. The direct AND gate knife tackle spare linkage of the quick -witted belt of door prevents that the sedan -chair door from opening because of the exogenic action, still plays an effect that drives sedan -chair door and layer door synchronization action, shortened the sedan -chair door with a layer door synchro switch time, saved the required space of switch door. The latch hook improves the mode that is passing -through door machine belt switch by or