| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric winch apparatus capable of preventing occurrence of a slip-down phenomenon of an object and a slip-down phenomenon of a brake at the time of start of hoisting-up or hoisting-down of the object.SOLUTION: An electric winch apparatus is provided with a controller 30. The controller 30 comprises: a first torque derivation section for calculating a value of hoisting-down torque applied to a drum 12 due to a load of an object 102; a second torque derivation section for calculating a value of hoisting-up torque applied to the drum 12 and generated by driving torque of an electric motor 14 on the basis of a value of a current supplied to the electric motor 14 and measured by an ammeter 34; and a brake control section for determining timing to release braking of the drum 12 on the basis of a difference between the value of the hoisting-down torque and the value of the hoisting-up torque after a lever 26a is operated from a neutral position to a hoisting-up side or a hoisting-down side, transmitting a control signal to instruct the brake 24 to release the braking of the drum 12 at the timing determined and releasing the braking with respect to the drum 12. |
