To realize a technology capable of improving the accuracy of lifting/lowering operation of a holding part while keeping error small in the lifting/lowering amount of the holding part due to changes in a belt winding diameter.SOLUTION: When a lifting/lowering operation of at least one of the lowering operation and the lifting operation of a holding part 10 is performed, a control unit finds a unit lifting/lowering amount, which is the lifting/lowering amount of the holding part 10 per unit rotation amount of a driving motor 23 within a lifting/lowering operation range which is the height range of the holding part 10 where the lifting/lowering operation is performed, according to change in the diameter of the outer circumferential surface of a belt 22 wound around a drum 21 by winding and unwinding the belt, and determines a rotation amount of the driving motor 23 for the lifting/lowering operation based on the unit lifting/lowering amount.SELECTED DRAWING: Figure 2

    【課題】ベルトの巻き取り径の変化に起因する保持部の昇降量の誤差を小さく抑えて、保持部の昇降動作の精度の向上を図ることができる技術を実現する。【解決手段】制御部は、保持部10の下降動作及び上昇動作の少なくとも一方である昇降動作を行う場合に、当該昇降動作が行われる保持部10の高さ範囲である昇降動作範囲における、駆動モータ23の単位回転量あたりの保持部10の昇降量である単位昇降量を、ドラム21に巻き取られているベルト22の外周面の径が巻き取り及び繰り出しによって変化することに応じて求め、単位昇降量に基づいて、昇降動作のための駆動モータ23の回転量を決定する。【選択図】図2


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    Title :

    ARTICLE LIFTING DEVICE


    Additional title:

    物品昇降装置


    Contributors:

    Publication date :

    2024-03-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / B66C Krane , CRANES



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