ABNORMALITY DIAGNOSTIC DEVICE FOR ELEVATOR

PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for an elevator, capable of easily and accurately determining that foreign matter is stuck to a groove of a sheave or of a pulley that is equipment of a rotationally driving system.SOLUTION: There is provided the abnormality diagnosti...

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1. Verfasser: SAKATA YOSHIKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for an elevator, capable of easily and accurately determining that foreign matter is stuck to a groove of a sheave or of a pulley that is equipment of a rotationally driving system.SOLUTION: There is provided the abnormality diagnostic device for an elevator detecting abnormality caused by foreign matter stuck to a sheave or a pulley around which a rope is wound. The abnormality diagnostic device includes velocity/position measurement means 11 measuring a velocity and a position of a car on the basis of a signal of a rotary encoder 5 output proportionally to a rotation amount of a motor 4; sensor abnormality determination means 13 detecting that the sheave or the pulley is an abnormality state on the basis of a measurement value of a sensor 9 provided in the car; abnormality occurrence cycle distance calculation means 15 calculating an interval at which abnormality occurs as a distance on the basis of a result of the velocity/position measurement means 11 and the sensor abnormality determination means 13; outer circumferential length storage means 16 prestoring outer circumferential lengths of the sheave and of the pulley; and abnormality portion identification means 17 comparing the distance and the outer circumferential lengths to identify the sheave or the pulley in which the abnormality occurs. 【課題】回転駆動系の機器であるシーブやプーリの溝に異物が固着したことを、簡易的かつ正確に判定することができるエレベーターの異常診断装置を提供する。【解決手段】ロープが巻き掛けられるシーブやプーリへ異物固着に起因する異常を検出するエレベーターの異常診断装置において、モータ4の回転量に比例して出力されるロータリーエンコーダ5の信号に基づいて乗りかごの速度と位置を計測する速度・位置計測手段11と、乗りかごに設けたセンサ9の計測値を基に異常状態であることを検出するセンサ異常判定手段13と、速度・位置計測手段11の結果とセンサ異常判定手段13とに基づいて異常が発生している間隔を距離として算出する異常発生サイクル距離算出手段15と、シーブとプーリの外周長さを予め記憶しておく外周長記憶手段16と、これら距離と外周長さとを比較して異常の発生しているシーブまたはプーリを特定する異常部位特定手段17とを備える。【選択図】図1