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US 2015/0251877 A1Published application
Elevator apparatus
AssigneeMitsubishi Electric Corporation
InventorTakeshi Niikawa
Life of this patent
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Abstract
In an elevator apparatus, an acceleration detector that generates an acceleration signal that corresponds to acceleration in a direction of travel of a car is mounted to the car. A car velocity monitoring portion finds a traveling velocity of the car from the acceleration signal from the acceleration detector. An excessive velocity is preset in the car velocity monitoring portion. The car velocity monitoring portion stops the car by means of a braking apparatus to if the traveling velocity of the car reaches the preset excessive velocity.
Claims6
An elevator apparatus comprising:
- a car;
- a braking apparatus that brakes traveling of the car;
- an acceleration detector that is mounted to the car, and that generates an acceleration signal that corresponds to acceleration in a direction of travel of the car;
- and
- a car velocity monitoring portion that finds a traveling velocity of the car from the acceleration signal, and that stops the car by means of the braking apparatus if the traveling velocity of the car reaches a preset excessive velocity,
- wherein the acceleration detector includes:
- an elastic body;
- a displacing member that is connected to the elastic body, and that elastically deforms the elastic body while displacing in response to the acceleration of the car;
- and
- a signal generating portion that detects displacement of the displacing member, and that generates a signal that corresponds to an amount of displacement of the displacing member as the acceleration signal, and
- wherein the car velocity monitoring portion finds the traveling velocity of the car by integrating the acceleration signal from the acceleration detector.
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Dependencies are inferred from the claim text.