Safety arrangement, elevator system, and method for preventing derailment of an elevator car at a turning station of an elevator system
AssigneeKone Corporation
InventorsJuha-Matti Aitamurto, Ari Kattainen
Life of this patent
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Abstract
A safety arrangement is suitable for a turning station of an elevator system. The safety arrangement includes at least one first blocking position for preventing, by a first mechanical device, an elevator car from entering the turning station, wherein the first mechanical device is arranged to change its position in response to operation of the turning station, and at least one second blocking position for preventing, by a second mechanical device, an elevator car from exiting the turning station.
Claims20
A safety arrangement for a turning station of an elevator system, comprising:
- a rotatable turning device;
- a first mechanical device having at least one arcuate section extending about a perimeter of the rotatable turning device and having at least one opening at the perimeter of the rotatable turning device, a length along the perimeter of the least one arcuate section being greater than a length along the perimeter of the at least one opening, the first mechanical device being rotatable about an axis;
- a second mechanical device having at least one opening,
- at least one blocking position for preventing an elevator car from entering the turning station by the at least one opening of the first mechanical device not aligning with the at least one opening of the second mechanical device;
- and
- at least one aligned position having the at least one opening of the first mechanical device aligned with the at least one opening of the second mechanical device to allow the elevator car to enter and exit the turning station.
A method for preventing derailment of an elevator car at a turning station of an elevator system, comprising:
- providing a rotatable turning device;
- arranging at least one opening in a first mechanical device having at least one arcuate section, the at least one opening being at the perimeter of the rotatable turning device, a length along the perimeter of the least one arcuate section being greater than a length along the perimeter of the at least one opening, the first mechanical device extending about a perimeter of the rotatable turning device relative to at least one opening in a second mechanical device so that the at least one opening in the second mechanical device is completely misaligned with the at least one opening in the first mechanical device in a radial direction to prevent an elevator car from entering the turning station when the turning station is in a blocking position relative to the elevator car;
- configuring the first mechanical device to change its position relative to the second mechanical device in response to operation of the turning station;
- and
- arranging the at least one opening in the first mechanical device to be aligned with the at least one opening in the second mechanical device to allow the elevator car to enter and exit the turning station in an aligned position.
Dependencies are inferred from the claim text.