Elevator door restrictor

Details Elevator door restrictor Elevator door restrictor

1998-06-17

1999-12-28

Salata, Jonathan

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

187331, B66B 1314

Patent

active

060068663

ABSTRACT:
An elevator is provided with a car and inner and outer doors. The inner door registers with one of the outer doors when the car is disposed within a floor zone. A solenoid on the car has a plunger for blocking the inner door from opening. Power will only be applied to the solenoid to move the plunger to a retracted position to allow the inner door to be fully opened when both the car is disposed within a floor zone and the inner doors are being opened by the main elevator controls. A floor zone sensor is mounted to the car for detecting when the elevator is disposed within one of the floor zones. A door sensor is also mounted to the car for detecting when the inner door is being opened by the main elevator controls. A controller operates the electric solenoid to lift the plunger from the extended position to the retracted position in response to receiving both a door data signal from the door sensor and a floor zone data signal from the floor zone sensor. In the event of a power loss, the plunger will strike a lift clip so that the inner door may close.

REFERENCES:
patent: 4436184 (1984-03-01), Dorman et al.
patent: 4800741 (1989-01-01), Kerschenbaum et al.
patent: 5655627 (1997-08-01), Horne et al.

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