To achieve a technology capable of suppressing vibration to the minimum acting on a holding part and an article held by the holding part when switching from an acceleration descent action to a constant-speed descent action, in the case of lowering the holding part by performing the acceleration descent action, the constant speed descent action and a deceleration descent action sequentially.SOLUTION: In the case of lowering a holding part 10, a control part 30 increases a descent speed of the holding part 10 gradually toward a descent target speed, and performs a constant speed descent action for maintaining the descent speed of the holding part 10 at the descent target speed, and then, gradually decreases the descent speed of the holding part 10 from the descent target speed and stops the holding part 10. In the constant speed descent action, the control part 30 controls a drive part 23 so as to gradually increase the rotational speed of the pulley 21 as the diameter of the outer peripheral surface of a belt 22 taken up by a pulley 21 gradually decreases due to the feeding.SELECTED DRAWING: Figure 2
【課題】加速下降動作、定速下降動作、及び減速下降動作を順に行って保持部を下降させる場合に、加速下降動作から定速下降動作への切り替え時に保持部や保持部に保持された物品に作用する振動を小さく抑えることが可能な技術を実現する。【解決手段】制御部30は、保持部10を下降させる場合に、保持部10の下降速度を下降用目標速度に向けて次第に増加させた後、保持部10の下降速度を下降用目標速度に維持する定速下降動作を行い、その後、保持部10の下降速度を下降用目標速度から次第に減少させて保持部10を停止させる。制御部30は、定速下降動作において、プーリ21に巻き取られているベルト22の外周面の径が繰り出しによって次第に小さくなることに応じて、プーリ21の回転速度を次第に増加させるように駆動部23を制御する。【選択図】図2
ARTICLE LIFTING DEVICE
物品昇降装置
12.12.2023
Patent
Elektronische Ressource
Japanisch
ARTICLE LIFTING DEVICE AND ARTICLE TRANSPORT VEHICLE EQUIPPED WITH ARTICLE LIFTING DEVICE
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