Door drive apparatus with locking mechanism for elevators

Details Door drive apparatus with locking mechanism for elevators Door drive apparatus with locking mechanism for elevators

1992-05-14

1993-09-21

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

49118, B66B 1300

Patent

active

052460894

ABSTRACT:
A door drive apparatus with a locking mechanism for elevator doors permits the opening of the car door situated in the region of a floor together with a coupled-on shaft door, driven automatically in the normal case or manually in the case of a power failure. If the elevator car is situated outside a floor region, the car door remains locked. A control cam mounted at the upper end of a car door leaf is connected with a door drive by a belted drive means and causes a low-jerk opening and closing of the car door at the closing end of travel. The control cam is connected by a pull rod to an entraining member parallelogram for the coupling of the shaft door to the car door. A locking mechanism on the upper end of the same door leaf has an actuating roller which is actuated by a double lever connected to the control cam and the pull rod for the unlocking when the car is located in the door opening region of a floor.

REFERENCES:
patent: 2816625 (1952-12-01), McCormick
patent: 3605952 (1971-09-01), Lusti
patent: 4947964 (1990-08-01), Husmann

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