Locking elevator car frame to building during loading/unloading horizontally moveable cab
AssigneeOtis Elevator Company
InventorsAnthony Cooney, Frederick H. Barker, Bruce A. Powell, Samuel C. Wan, Paul Bennett, Richard C. McCarthy, Joseph Bittar
Life of this patent
Estimating the term…
Abstract
To prevent elevator rope stretch effects when a horizontally transferable elevator cab (18) is rolled onto and off of an elevator car frame (10), an elevator car/floor lock (31) includes a bolt (37) which extends across the interface between the car frame and the building and engages a strike (39). Jack screw (44) and solenoid (60) embodiments are shown. The bolt may extend from the car frame to the building (FIGS. 1-4) or from the building to the car frame (FIG. 5).
Claims21
A car floor lock for locking an elevator car frame to a floor landing of a building when said car frame is disposed at said landing, said lock spanning an interface having two sides between said car frame and a structure in an elevator hoistway at said landing, said lock comprising:
- a bolt disposed to extend horizontally from a first side of said interface to span said interface;
- a strike on the other side of said interface for receiving said bolt when it is extended, engagement of said bolt with said strike preventing relative vertical motion between said elevator car frame and said structure;
- means for selectively extending said bolt into said strike or, alternatively, retracting said bolt so as to be clear of interface;
- and
- means for sensing upward or downward force exerted between said bolt and said strike and providing a signal indicative of the magnitude and direction thereof.
A lock according to claim 6 wherein said means for selectively extending comprises:
- a jack screw operable in either one of two horizontal directions, having a threaded shaft connected to said bolt, operation of said jack screw in a first one of said directions extending said bolt into said strike, and operation of said jack screw in a second one of said directions retracting said bolt so as to be clear of said interface.
A car floor lock for locking an elevator car frame to a floor landing of a building when said car frame is disposed at said landing, said lock spanning an interface between said car frame and a structure in an elevator hoistway at said landing, said lock comprising:
- a plurality of bolts disposed on said car frame, each disposed to extend horizontally to span said interface;
- a plurality of strikes, one for each of said bolts, each disposed in said structure on the other side of said interface from the related bolt, for receiving said related bolt when it is extended, engagement of said related bolt with each of said strikes preventing relative vertical motion between said elevator car frame and said structure;
- a plurality of operating means, one for each of said bolts, each for selectively extending the corresponding one of said bolts into the related strike or, alternatively, retracting said corresponding bolt so as to be clear of said interface;
- and
- means for sensing upward or downward force exerted between said bolt and said strike and providing a signal indicative of the magnitude and direction thereof.
A car floor lock for locking an elevator car frame to a floor landing of a building when said ar frame is disposed at said landing, said lock spanning an interface between said car frame and a structure in an elevator hoistway at said landing, said lock comprising:
- a plurality of bolts disposed on said structure, each disposed to extend horizontally to span said interface;
- a plurality of strikes, one for each of said bolts, each disposed on said car frame on the other side of said interface from the related bolt for receiving said bolt when it is extended, engagement of said related bolt with each of said strikes preventing relative vertical motion between said elevator car frame and said structure;
- a plurality of operating means, one for each of said bolts, each for selectively extending the corresponding one of said bolts into the related strike or, alternatively, retracting said corresponding bolt so as to be clear of said interface;
- and
- means for sensing upward or downward force exerted between said bolt and said strike and providing a signal indicative of the magnitude and direction thereof.
Dependencies are inferred from the claim text.