Method for monitoring the movement of an elevator car, and an elevator system
AssigneeKone Corporation
InventorsAri Harkonen, Petteri Valjus
Life of this patent
Estimating the term…
Abstract
The invention relates to an elevator system and also to a method for monitoring the movement an elevator car. In the method a first emergency braking procedure is activated for braking the elevator car at a first deceleration if the speed of the elevator car exceeds the first limit value for permitted speed, and also a second emergency braking procedure is further activated for braking the elevator car at a second deceleration that is greater than the first, if the speed of the elevator car exceeds the second limit value for permitted speed that is greater than the first limit value for permitted speed.
Claims19
Method for monitoring the movement an elevator car, in which method:
- a first emergency braking procedure is activated for braking the elevator car at a first deceleration if the speed of the elevator car exceeds the first limit value for permitted speed.
- wherein
- a second emergency braking procedure is further activated for braking the elevator car at a second deceleration that is greater than the first, if the speed of the elevator car exceeds the second limit value for permitted speed that is greater than the first limit value for permitted speed.
Elevator system, which comprises:
- an electric drive, for moving the elevator car in the elevator hoistway;
- a machinery brake;
- monitoring arrangement, which monitoring arrangement comprises means for controlling the electric drive and the machinery brake;
- and which monitoring arrangement is arranged to activate a first emergency braking procedure for braking the elevator car at a first deceleration, if the speed of the elevator car exceeds the first limit value for permitted speed;
- wherein the monitoring arrangement is arranged to further activate a second emergency braking procedure for braking the elevator car at a second deceleration that is greater than the first, if the speed of the elevator car exceeds the second limit value for permitted speed that is greater than the first limit value for permitted speed.
Dependencies are inferred from the claim text.