Elevator apparatus and rope sway suppressing method therefor

Abstract

In an elevator apparatus, an actuating device applies a tension for suppressing a lateral vibration to a rope. A computation controller controls the actuating device by using lateral-vibration information of the rope as an input. Also, the computation controller selectively outputs, to the actuating device, a plurality of actuating commands including a first actuating command for applying the tension to the rope regardless of phase information of the lateral vibration of the rope and a second actuating command for applying a tension fluctuation for damping the lateral vibration to the rope based on the phase information.

Description

technical field [0001] The present invention relates to an elevator apparatus and a method for suppressing the rope swing by appropriately controlling the tension of the rope when the rope vibrates laterally due to the swing of the building caused by an earthquake or strong wind, for example, and suppressing the swing of the rope. Lateral vibration. Background technique [0002] In recent years, high-rise buildings have been known to sustain low-period oscillations due to long-period seismic motion or strong winds. In addition, in an elevator installed in such a high-rise building, the ropes such as the main rope, the speed governor rope, and the compensation rope resonate with the vibration of the building to swing greatly, and contact the hoistway equipment to cause damage or hooking. . If the elevator apparatus is operated in such a state, the equipment may be damaged, passengers may be trapped, and it may take a long time to recover. [0003] Therefore, in the convent...

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Problems solved by technology

[0004] However, in the method of simply increasing the tension of the rope, there is a problem that by increasing the tension, the natural vibration frequency of the rope is sometimes approached to the natural vibration frequency of the building, and the lateral vibration of the rope is strengthened.

[0013] Therefore, in the conventional rope swing suppression method that uses phase information to apply tension fluctuations to the rope, there is a problem that the phase information cannot be accurately obtained during the growth of the lateral vibration of the rope, and the rope swing cannot be sufficiently suppressed.

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