Patent ID: 7051842

Claim:
An emergency moving device of an elevator, comprising a main moving gear disposed on a top of a car member of the elevator; a reduction gear fixed on top of said car member and coupled to said main moving gear; a plurality of gears coupled to a shaft of said reduction gear for imparting a turning movement to said shaft of said reduction gear and thereby drive said main moving gear; a first connecting member releasably coupled to the car member, said first connecting member being coupled to steel ropes of the elevator used for vertically displacing the car member; a second connecting member affixed to the car member and releasably coupled to said first connecting member; a plurality of chains respectively being connected on one end thereof to said first connecting member and respectively engaging said plurality of gears; a braking switch releasably engageable with said main moving gear for blocking and unblocking rotation of said moving gear; a hydraulic governor coupled to said main moving gear; and, a fall prevention device releasably coupling said first connecting member to said second connecting member; whereby when the car member is stopped between floors by a power failure, said fall prevention device is operable to uncouple said first connecting member from said second connecting member in correspondence with release of said braking switch from engagement with said main moving gear to thereby lower the car member relative to said first connecting member responsive to displacement of said plurality of chains at a rate controlled by said hydraulic governor, said displacement of said plurality of chains driving said plurality of gears to rotate, said main moving gear being driven to rotate against a resistance provided by said hydraulic governor through rotation of said shaft of said reduction gear responsive to side rotation of said plurality of gears.