PROBLEM TO BE SOLVED: To provide an electric hoist that is able to prevent a backlash phenomenon when a traction member is drawn from a rotor, and to provide a control device and a control method therefor.SOLUTION: A control device 15 for controlling an electric hoist 1 according to the present invention comprises: a tension sensor 20 that detects tension of a traction member a mode input section 16 that inputs a mode switch signal for switching between a winding mode and a drawing mode and a control section 18 that controls operation of an electric motor 2. When the drawing mode is set, the control section 18 controls the electric motor 2 according to a detection signal from the tension sensor such that in a case where the tension of the traction member is equal to or greater than a predetermined threshold, a rotor 4 is reversely rotated and, in a case where the tension of the traction member is less than the threshold, the rotor 4 is not reversely rotated.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】回転体からの牽引部材の繰り出し時のバックラッシュ現象を防止できる電動巻き上げ機及びその制御装置並びに制御方法を提供する。【解決手段】本発明の電動巻き上げ機1を制御するための制御装置15は、牽引部材の張力を検出するための張力センサ20と、巻き取りモードと繰り出しモードとを切り換えるモード切り換え信号を入力するためのモード入力部16と、電動モータ2の動作を制御する制御部18とを有する。制御部18は、繰り出しモードに設定されると、張力センサからの検出信号に応じて、牽引部材の張力が所定の閾値以上の場合には回転体4が逆回転されるとともに牽引部材の張力が所定の閾値を下回る場合には回転体4が逆回転されないように電動モータ2を制御する。【選択図】 図2
