Hoistway intrusion detection
AssigneeOtis Elevator Company
InventorsWolfgang M. Schoppa, Axel Steffen Gerwing
Life of this patent
Estimating the term…
Abstract
Elevator, exhibiting an elevator shaft (34) and a car (32) which is movably provided inside the elevator shaft (34), and a safety installation (2), which is designed in such a way that it can take the elevator out of service in a dangerous situation, characterized by the fact that the safety installation (2) is equipped with a shaft monitoring device.
Claims12
An elevator system including an elevator shaft and a car, which is movable inside the elevator shaft, and a safety installation, which is designed in such a way that it can take the elevator out of service in a dangerous situation, said safety installation comprising:
- a shaft monitoring device for generating a signal;
- and
- a safety control system connected to the shaft monitoring device wherein the safety control system, is responsive to the signal for the detection of a dangerous situation when the car is at a halt and for determining the functional status of the shaft monitoring device while the car is in motion.
Method for retrofitting a shaft monitoring device in an existing elevator with a safety installation which is designed in such a way that it can take the elevator out of service in a dangerous situation which is recognized as such by the safety installation comprising the steps of:
- providing a shaft monitoring device;
- mounting the shaft monitoring device in the elevator shaft;
- generating a signal by the monitoring device upon detection of movement in the elevator shaft;
- connecting the shaft monitoring device to the safety installation;
- monitoring the signal generated by the shaft monitoring device with the safety installation while the elevator is at a halt to take the elevator out of service in response to the signal;
- and
- performing a function check of the safety installation while the elevator is moving.
Dependencies are inferred from the claim text.