When a holding unit is lowered, a control unit gradually increases the lowering velocity of the holding unit toward a target lowering velocity, performs a constant velocity lowering operation of maintaining the lowering velocity of the holding unit at the target lowering velocity, and then gradually decreases the lowering velocity of the holding unit from the target lowering velocity to stop the holding unit. The control unit controls the drive unit to gradually increase the rotational velocity of the pulleys in response to a gradual decrease in the diameter of the outer surface of the belt wound-up around the pulley by unwinding in the constant velocity lowering operation.
Article Lifting/Lowering Apparatus
2023-11-30
Patent
Elektronische Ressource
Englisch
IPC: | B66D Haspeln , CAPSTANS |
Europäisches Patentamt | 2022
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