To provide an abnormality monitoring system capable of accurately detecting abnormality of a safety device for an elevator.SOLUTION: An abnormality monitoring system includes a first detection device 3A for detecting the rotation amount of a hoisting machine 1 which hoists a main rope R1 for suspending a car K, a second detection device 3B for detecting the rotation amount of a governor pulley 21 or a tension pulley 22 that is rotated by a governor rope R2 connected to the car K, a user detection device 3C, and a control device 4. The control device 4 includes a calculation processing unit, a generation processing unit, and a change processing unit. The calculation processing unit calculates a difference between the speed of the car K obtained from the rotation amount detected by the first detection device 3A and the speed of the car K obtained from the rotation amount detected by the second detection device 3B by using these speeds. The generation processing unit generates an abnormal signal when the difference calculated by the calculation processing unit becomes a threshold or more. The change processing unit determines the presence/absence of a user based on the detection result of the user detection device 3C and change the threshold depending on the presence/absence of a user.SELECTED DRAWING: Figure 1
【課題】エレベータの安全装置の異常を精度良く検出することが可能な異常監視システムを提供する。【解決手段】異常監視システムは乗りかごKを吊す主ロープR1を巻き上げる巻上機1の回転量を検出する第1検出装置3Aと乗りかごKに連結されたガバナロープR2によって回転するガバナプーリ21又はテンションプーリ22の回転量を検出する第2検出装置3Bと利用者検出装置3Cと制御装置4とを備える。制御装置4は算出処理部と発生処理部と変更処理部とを含む。算出処理部は第1検出装置3Aが検出する回転量から求まる乗りかごKの速度と第2検出装置3Bが検出する回転量から求まる乗りかごKの速度とを用いて、それらの差分を算出する。発生処理部は算出処理部が算出した差分が閾値以上になった場合に異常信号を発生する。変更処理部は利用者検出装置3Cの検出結果に基づいて利用者の有無を判断し、利用者の有無に応じて閾値を変更する。【選択図】図1
ABNORMALITY MONITORING SYSTEM FOR ELEVATOR
エレベータの異常監視システム
2021-03-01
Patent
Electronic Resource
Japanese
IPC: | B66B Aufzüge , ELEVATORS |
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