Monitoring condition of safety system for elevator
First Claim
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1. A safety system of an elevator, comprising:
- a safety device provided in an elevator shaft of the elevator and configured to establish a temporary safety space during a maintenance mode of the elevator by limiting travel of an elevator car when in a fully extended position, the safety device including;
a first switch that is configured to detect a first end position of the safety device, wherein in the first end position, the safety device is in a fully retracted position; and
a second switch, different from the first switch, wherein the second switch is configured to detect a second end position of the safety device, wherein in the second end position, the safety device is in the fully extended position; and
a controller configured to;
monitor a change of a state of the first switch and a change of a state of the second switch,monitor a sequence or an order of the changes of the states, wherein the sequence or the order is desired or non-desired, andblock a drive of the elevator if the sequence or the order is non-desired.
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Abstract
According to few examples a safety system, a method and a computer program for an elevator safety system is provided. A first switch configured to detect a first position of a safety device of an elevator. A second switch configured to detect a second position of the safety device. A controller configured to monitor a change of a state of the first switch and a change of a state of the second switch.
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Citations
11 Claims
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1. A safety system of an elevator, comprising:
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a safety device provided in an elevator shaft of the elevator and configured to establish a temporary safety space during a maintenance mode of the elevator by limiting travel of an elevator car when in a fully extended position, the safety device including; a first switch that is configured to detect a first end position of the safety device, wherein in the first end position, the safety device is in a fully retracted position; and a second switch, different from the first switch, wherein the second switch is configured to detect a second end position of the safety device, wherein in the second end position, the safety device is in the fully extended position; and a controller configured to; monitor a change of a state of the first switch and a change of a state of the second switch, monitor a sequence or an order of the changes of the states, wherein the sequence or the order is desired or non-desired, and block a drive of the elevator if the sequence or the order is non-desired. - View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. A method of a safety system of an elevator, comprising the steps of:
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providing a safety device in an elevator shaft of the elevator, wherein the safety device establishes a temporary safety space during a maintenance mode of the elevator by limiting travel of an elevator car when in a fully extended position, the safety device including; a first switch that detects a first end position of the safety device, wherein in the first end position, the safety device is in a fully retracted position; and a second switch, different from the first switch, that detects a second end position of the safety device, wherein in the second end position, the safety device is in the fully extended position; monitoring, by a controller, a change of a state of the first switch and a change of a state of the second switch; monitoring, by the controller, a sequence or an order of the changes of the states, wherein the sequence or the order is desired or non-desired; and blocking, by the controller, a drive of the elevator if the sequence or the order is non-desired. - View Dependent Claims (8, 10, 11)
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Specification