Elevator system
AssigneeKone Corporation
InventorsAri Kattainen, Jari Kantola
Life of this patent
Estimating the term…
Abstract
According to an aspect, there is provided an elevator system comprising an elevator car configured to move in an elevator shaft; a main safety controller comprising a main safety output and a secondary safety output, wherein the main safety output is configured to control machinery brakes of the elevator car; and a secondary safety circuit connected to the secondary safety output and arranged in the elevator car and comprising at least one safety contact configured to control stopping means arranged in the elevator car; wherein when the at least one safety contact is triggered the secondary safety circuit is configured to control the stopping means to cause stopping of the elevator car.
Claims12
An elevator system comprising:
- an elevator car configured to move in an elevator shaft;
- a first safety circuit;
- a main safety controller including a main safety output and a secondary safety output, wherein the main safety output is configured to selectively electrically stop the elevator car by disconnecting a power supply to machinery brakes of the elevator car based on the first safety circuit to cause the machinery brakes to engage and stop the elevator car;
- a stopping device arranged at the elevator car, the stopping device including a solenoid, an engagement mechanism attached to the elevator car and a safety gear, the safety gear configured to activate and tighten to a guide rail in response to a speed limiting rope being inhibited from moving together with the elevator car when the engagement mechanism attached to the elevator car contacts a triggering device located at a fixed position in the elevator shaft;
- and
- a secondary safety circuit connected to the secondary safety output and arranged in the elevator car, the secondary safety circuit including at least one safety contact electrically connected between a power source and the solenoid via wiring, the at least one safety contact configured to mechanically stop the elevator car without disconnecting the power supply associated with the machinery brakes from providing power thereto by instructing the solenoid to cause the engagement mechanism of the stopping device to move to a position enabling the engagement mechanism to contact the triggering device to cause the triggering device to inhibit the speed limiting rope from moving with the elevator car to cause the safety gear to activate and tighten to the guide rail, when the at least one safety contact is triggered.
Dependencies are inferred from the claim text.