When an engine (70) is started in a state where a support member (21) of a multi-coupler (20) is attached to a mating support member (22), the pressure of hydraulic oil increases in a detection target pipeline part (32B). A pressure detection unit (80) detects the pressure of the hydraulic oil in the detection target pipeline part (32B). A connection state determining unit (91) determines whether a tank-side pipeline part (31A) and a motor-side pipeline part (31B) are connected to each other, based on the pressure. When the connection state determining unit (91) determines that the tank-side pipeline part (31A) and the motor-side pipeline part (31B) are not connected to each other in a state where the engine (70) is started, a pressure increase suppression unit carries out an operation for suppressing an increase in the pressure of a hydraulic motor (12).
WINCH DRIVE DEVICE IN CRANE
WINDENANTRIEBSVORRICHTUNG IN EINEM KRAN
DISPOSITIF D'ENTRAÎNEMENT DE TREUIL DANS UNE GRUE
2024-03-06
Patent
Electronic Resource
English
Crane winch protection device, crane and crane winch protection method
European Patent Office | 2020
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