Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-06-11
1993-10-05
Stephan, Steven L.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 31, 187 52R, 187104, 318257, 318282, 318626, B66B 1314
Patent
active
052507653
ABSTRACT:
An apparatus for controlling an elevator door comprises a motor for opening and closing an elevator door, an inverter unit for controlling the driving of the motor, a door position detecting unit for detecting the position of the door, first and second sensors for respectively detecting that the door passes through a terminal reference point on the opening side and a terminal reference point on the closing side, a speed command generating unit for generating a speed command on the basis of a distance between the door position detected by the door position detecting unit to a stop target on the opening side or the closing side when the first and second sensors respectively detect the passage of the door, and a control unit for controlling the inverter unit on the basis of the speed command output from the speed command generating unit.
REFERENCES:
patent: 4305481 (1981-12-01), Hmelovsky et al.
patent: 4776433 (1988-10-01), Lagree et al.
patent: 5131506 (1992-07-01), Mizuno et al.
patent: 5144101 (1992-09-01), Tawada et al.
patent: 5162711 (1992-11-01), Heckler
patent: 5170865 (1992-12-01), Mizuno et al.
Hirabayashi Terumi
Kodera Toshiyuki
Mizuno Masamoto
Tawada Masanori
Dougherty Thomas M.
Mitsubishi Denki & Kabushiki Kaisha
Stephan Steven L.
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