SAFETY DEVICE OF A LIFT SYSTEM
5 Assignments
0 Petitions
Accused Products
Abstract
A safety device of a lift system may include a car comprising an evaluation device and a measuring device. Conditions where departure from a door zone with an open car door or where impermissible accelerations/speeds are reached within the door zone are identifiable by way of the evaluation device and output signals from the measuring device. In such conditions, a control signal may be generated for braking the car. A safety circuit may be connected to the evaluation device and ensure a first safe zone in a shaft head of a lift shaft during an inspection run. The safety circuit may have a safety switch, and the car may include a tripping means for tripping the safety switch. The safety switch and the tripping means have a first relative position upon which the first safe zone is based, and entry of the car into the first safe zone during the inspection run is preventable by tripping the safety switch, which leads to generation of the control signal and braking of the car.
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Citations
32 Claims
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1-13. -13. (canceled)
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14. A safety device of a lift system having a lift car, the safety device comprising:
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an evaluation device; a measuring device, wherein by way of the evaluation device and output signals from the measuring device, conditions where the lift car departs from at least one door zone with an open door, where the lift car reaches an impermissible acceleration within the at least one door zone, or where the lift car reaches an impermissible speed within the at least one door zone are detectable and a control signal for braking the lift car is generated; and a safety circuit that is connected to the evaluation device to ensure a first safe zone in a shaft head of a lift shaft during an inspection run, wherein the safety circuit includes a safety switch and the lift car includes tripping means for tripping the safety switch, wherein the safety switch and the tripping means have a first position relative to each other based on which the first safe zone is defined, so that the lift car can be prevented from moving into the first safe zone during the inspection run by tripping the safety switch, which causes the evaluation device to generate the control signal for braking the lift car. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A lift system comprising:
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a lift car that is movable in a lift shaft; and a safety device that includes an evaluation device, a measuring device, wherein by way of the evaluation device and output signals from the measuring device, conditions where the lift car departs from at least one door zone with an open door, where the lift car reaches an impermissible acceleration within the at least one door zone, or where the lift car reaches an impermissible speed within the at least one door zone are detectable and a control signal for braking the lift car is generated, and a safety circuit that is connected to the evaluation device to ensure a first safe zone in a shaft head of a lift shaft during an inspection run, wherein the safety circuit includes a safety switch and the lift car includes tripping means for tripping the safety switch, wherein the safety switch and the tripping means have a first position relative to each other based on which the first safe zone is defined, so that the lift car can be prevented from moving into the first safe zone during the inspection run by tripping the safety switch, which causes the evaluation device to generate the control signal for braking the lift car. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for operating a lift system having a lift car and a safety device that comprises an evaluation device;
- a measuring device; and
a safety circuit that is connected to the evaluation device to ensure a first safe zone in a shaft head of a lift shaft in an inspection mode, wherein the safety circuit includes a safety switch and the lift car includes tripping means for tripping the safety switch, wherein the safety switch and the tripping means have a first position relative to each other based on which the first safe zone is defined, the method comprising;in a normal mode detecting based on output signals from the measuring device conditions where the lift car departs from at least one door zone with an open car door, where the lift car reaches an impermissible acceleration within the at least one door zone, or where the lift car reaches an impermissible speed within the at least one door zone, and generating a control signal for braking the lift car when any of the conditions is detected; and in the inspection mode generating the control signal for braking the lift car based on tripping of the safety switch, which prevents the lift car from moving into the first safe zone. - View Dependent Claims (31, 32)
- a measuring device; and
Specification