| 摘要 |
PURPOSE: To improve workability in a high place by controlling a respective driving means so that a bucket may be moved in the horizontal straight direction and may be oscillated in the opposite directions at the same angle as the turning angle of a telescopic boom. CONSTITUTION: A selection signal for selecting the moving direction and a signalθ3 of a bucket oscillating angle sensor 14 are calculated by an arithmetic device 17 by operating a movement operating lever of an operating device 15, and the angle formed between the movement operating lever and a telescopic boom in plan view is found. The found value, a detected value of a boom length sensor 12, a detected valueθ1 of a boom derricking angle sensor 11 are calculated on the basis of the specified conditions, respective driving means 7, 9, 5 and 18 are operated by the output signals Vθ1 , V1, Vθ2 , and Vd, and a bucket is moved in the horizontal straight direction and simultaneously oscillated in the opposite directions at the same angle as the turning angle of the telescopic boom. Accordingly, since the direction for moving the bucket in the horizontal straight direction can be freely selected regardless of the telescopic boom derricking surface, an installing place of a high lift truck has no trouble, and the high lift truck can be moved in the horizontal straight direction.
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