PROBLEM TO BE SOLVED: To provide a measurement method of a lifting load of a crane which is improved in safety and operability at a low cost by shortening a measurement time by using torque data of an inverter as data of a load gauge.SOLUTION: When a hoist of a crane is stopped, a motor is operated for stopping a command, a brake is released at that time, a motor torque value at that time is converted to a lifting load value, motor torque values at wind-up acceleration at a non-load tare load, wind-up deceleration, wind-down acceleration and wind-down deceleration are measured and recorded in advance, the motor torque value at the wind-up acceleration at the non-load tare load is subtracted from the motor torque value during a wind-up acceleration operation when lifting a load at the wind-up acceleration, the motor torque value at the wind-up deceleration is similarly added at the wind-up deceleration, the motor torque value at the wind-down acceleration is added at the wind-down acceleration, and the motor torque value at the wind-down deceleration is subtracted at the wind-down deceleration, thus calculating the lifting load value at acceleration and deceleration.SELECTED DRAWING: Figure 2

    【課題】インバータのトルクデータを荷重計のデータとして利用することにより、安価に、かつ、計測時間の短縮化を行うことにより、安全性や操作性を向上するようにしたクレーンの吊上げ荷重の測定方法を提供すること。【解決手段】クレーンの巻上げ装置を停止させている時に、モータに停止指令運転をさせ、この時ブレーキを開放して、その時のモータトルク値を吊上げ荷重値に換算するようにするとともに、予め無負荷風袋荷重での巻上げ加速時、巻上げ減速時、巻下げ加速時及び巻下げ減速時のモータトルク値を測定、記憶しておき、巻上げ加速時は、荷重を吊った時の巻上げ加速運転中のモータトルク値から、前記無負荷風袋荷重での巻上げ加速時のモータトルク値を減算し、同様に、巻上げ減速時は、巻上げ減速時のモータトルク値を加算、巻下げ加速時は、巻下げ加速時のモータトルク値を加算、巻下げ減速時は、巻下げ減速時のモータトルク値を減算することにより、加減速時の吊上げ荷重値を算出する。【選択図】図2


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    Title :

    MEASUREMENT METHOD OF LIFTING LOAD OF CRANE


    Additional title:

    クレーンの吊上げ荷重の測定方法


    Contributors:

    Publication date :

    2018-03-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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