Elevator leveling control device

Details Elevator leveling control device Elevator leveling control device

1991-06-18

1992-10-27

Pellinen, A. D.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187115, B66C 128

Patent

active

051591626

ABSTRACT:
An elevator control device includes an operation control device for controlling the speed of a car by a regular-speed command when the car is in a normal operation, and the operation control device generates a readjusting-speed command for retaining the car in a predetermined range when a stop position of the car at rest deviates from the predetermined range. The elevator control device also includes a readjusting-speed command reducing device for reducing a readjusting-speed command value to zero at a predetermined rate while an opened door of the car is closing, and switching device for switching to a regular-speed command from a readjusting-speed command when the door of the car is completely closed.

REFERENCES:
patent: 4042068 (1977-08-01), Ostrander et al.
patent: 4337846 (1982-07-01), Yonemoto et al.
patent: 4494628 (1985-01-01), Uherek et al.
patent: 4785914 (1988-11-01), Blain et al.

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