Load measuring apparatus for an elevator car

Details Load measuring apparatus for an elevator car Load measuring apparatus for an elevator car

1992-01-30

1994-04-26

Peckman, Kristine L.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

G01G 1914

Patent

active

053068793

ABSTRACT:
The load measuring apparatus is arranged at an elevator car and detects the car load brought about by passengers and/or goods transported by the elevator car. An upper crossbeam together with vertically extending supports and a lower crossbeam forms a support frame suspended at traction cables and moves within an elevator shaft along suitable guide rails. A floor frame mounted on isolation pads at the lower crossbeam carries the elevator car. At the roof of the elevator car there is centrally arranged a reference plate member which is part of the load measuring apparatus. A proximity sensor centrally arranged at the upper crossbeam has a predetermined frontal spacing from the reference plate member in the no-load condition of the elevator car. When the elevator car carries a load this predetermined frontal spacing increases as a function of compression of the isolation pads. The proximity sensor then generates an electrical signal or potential which is dependent upon the momentarily prevailing frontal spacing of the sensor from the reference plate member.

REFERENCES:
patent: 4071116 (1978-01-01), Halperin et al.
patent: 4573542 (1986-03-01), Schlegel et al.
patent: 4793442 (1988-12-01), Heckler et al.
patent: 4986391 (1991-01-01), Salmon
patent: 5005671 (1991-04-01), Aime et al.
Product Literature of Efector Inc. for "Efector IA-4010-DNOG/IA5034" sensor.

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