An elevator system including an elevator car having an electromechanical door restraint mechanism which includes a locked position which permits slight opening of the door by passengers for ventilation purposes, while preventing the forcible opening of the elevator car door beyond that point when the elevator car stops outside a predetermined allowable displacement zone adjacent to a floor level. Power supply failure deenergizes a first solenoid of the mechanism which causes the door restraint mechanism to assume its locked position. A capacitor, charged by the power supply before failure thereof, energizes a second solenoid to unlock the door when the elevator car is within an allowable displacement zone, and the closed door is moved slightly by a passenger towards its open position. Continued movement of the car door, beyond the predetermined point, returns the mechanism to the locked position, which now prevents complete closure of the car door.
The governor ropes on an elevator are actuated by an emergency tripping system when motion away from a landing zone of the car is detected while the car doors remain open. If the elevator controller receives a "door open" signal and a "car moving out of landing zone" signal concurrently, a solenoid tripper is actuated which causes the governor rope blocks to set on the governor ropes thereby activating the car's emergency brakes. Conventional governor actuation systems can be retrofitted with the solenoid tripper of this invention.
When an elevator is running, the car door 27 is locked in the closed position by a brake shoe 12 which engages the edge of the door hanger 24 in response to a push-type solenoid 19 overcoming the force of a spring. When the door is not closed, a friction brake pad 11 contacts the door hanger surface to hold the door open for passenger boarding or to stop the door in case of failure of door operator power while the door is in motion.
An automatic stop mechanism for a rolling door includes two brake members mounted to the stop member which is removably engaged with the fixture, the stop member having a flange disengagably contacting the inclined flange to normally stop the rolling door, a handle pivotally connected to the fixture and connected to the first member and the second member so as to shift the stop member along the shaft of the motor, the two brake members each having a brake pad and located within the motor casing, when the rolling door runs downwardly fast and the normal stop mechanism fails, the two brake members are expanded due to the eccentric force to stop the door by the two brake pads contacting the motor casing.
An elevator door unit includes cage doors, a cage door lock unit, hall doors, and a lock release unit. The cage doors are provided in a cage which moves in a shaft. The cage door lock unit limits and locks the opening width of the cage doors to the width not to permit passing of passengers. The hall doors are provided in a landing hall, and opened interlocking with the cage doors, when the cage stops in a range of facing to the cage doors. The lock release unit releases the cage door lock unit within the opening width by opening the cage doors by manual operation, when the cage stops in a range that the cage doors face to the hall doors.
Microprocessor-based car door locking system includes an electromechanical door lock for elevator car doors having a latch-type rotary solenoid to move a plunger into locked and unlocked positions. In the locked position, the plunger engages a bracket mounted on the elevator car door. The door lock also includes a controller that integrates the door lock into the elevator system and provides failure management for the door lock. The door lock of the present invention does not require power during either the locked or unlocked state.
