Counter weighted safety device for an elevator
First Claim
1. A safety device for an elevator comprising a cabin, a counterweight, a cabin drive motor, said motor having a rotor, and at least one power-failure electromechanical brake, the safety device comprising a control device arranged:
- to receive at least one information allowing emergency power to be applied to the brake in order to release the rotor and allow the cabin blocked between two floors to move under an effect of unbalance between the weight of the cabin and the weight of the counterweight;
to receive at least one information enabling a speed of the cabin to be known; and
to manage power supply to the brake in such a manner as to enable the cabin to move to an evacuation floor under the effect of being out of balance with the counterweight, while preventing the speed of the cabin from exceeding a predefined limit,wherein the information enabling the speed of the cabin to be known is provided by at least one electrical magnitude from the motor.
1 Assignment
0 Petitions
Accused Products
Abstract
A safety device for an elevator includes a cabin, a counterweight, a cabin drive motor with a rotor, and at least one power-failure electromechanical brake. The safety device has a control device arranged to receive at least one information allowing emergency power to be applied to the brake in order to release the rotor, and allow the cabin blocked between two floors to move under the effect of unbalance between the weight of the cabin and the weight of the counterweight; to receive information enabling the speed of the cabin to be known; and to manage power supplied to the brake in such a manner as to enable the cabin to move to an evacuation floor while preventing the speed of the cabin from exceeding a predefined limit. The information that enables the speed of the cabin to be known is provided by at least one electrical magnitude from the motor.
-
Citations
12 Claims
-
1. A safety device for an elevator comprising a cabin, a counterweight, a cabin drive motor, said motor having a rotor, and at least one power-failure electromechanical brake, the safety device comprising a control device arranged:
-
to receive at least one information allowing emergency power to be applied to the brake in order to release the rotor and allow the cabin blocked between two floors to move under an effect of unbalance between the weight of the cabin and the weight of the counterweight; to receive at least one information enabling a speed of the cabin to be known; and to manage power supply to the brake in such a manner as to enable the cabin to move to an evacuation floor under the effect of being out of balance with the counterweight, while preventing the speed of the cabin from exceeding a predefined limit, wherein the information enabling the speed of the cabin to be known is provided by at least one electrical magnitude from the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12)
-
-
10. A safety device for an elevator comprising a cabin, a counterweight, a cabin drive motor, the motor having a rotor, and at least one power-failure electromechanical brake, the safety device comprising a control device arranged:
-
to receive at least one information allowing emergency power to be applied to the brake in order to release the rotor and allow the cabin blocked between two floors to move under an effect of an unbalance between the weight of the cabin and the weight of the counterweight; to receive at least one information enabling a speed of the cabin to be known; and to manage power supplied to the brake in such a manner as to enable the cabin to move to an evacuation floor under the effect of being out of balance with the counterweight, while preventing the speed of the cabin from exceeding a predefined limit, further comprising a brake power supply circuit having at least first and second contact switches that must both be ON to allow power to be applied to the brake, the first switch being controlled by a signal that is independent of the control device, the second switch being controlled both by a signal that is independent of the control device and by a signal coming from the control device.
-
Specification