Tadano Ltd.

Daiki Karashima

Satoshi Tanii

A controller calculates a theoretical payout length X1(θ) of a wire in a posture in which a hook block is raised, a theoretical payout length X2(θ) of the wire in a posture in which the hook block is lying, dX1(θ)/dt, and dX2(θ)/dt, using a length L of the boom, A and B (first specified values) indicating coordinates of a hook hardware, a length K (second specified value) being a sum of a length of the hook block and a length of a hook hardware, and a derricking angle θ of the boom. The controller makes the boom stand and lie at a constant speed of F=dθ/dt, and makes a winch drive at a wind-up speed of J×{dX1(θ)/dt+dX2(θ)/dt}/2 taking J×{X1(θ)+X2(θ)}/2 as a target value.

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Kagawa, Japan

Daiki Karashima