| 摘要 |
PROBLEM TO BE SOLVED: To make operability excellent by computing the driving quantities of two operating axes at the time of a horizontal operation mode, and computing the driving quantity of at least one operating axis at the time of a vertical operation mode. SOLUTION: At the time of setting a horizontal operation mode, an X-axis and a Y-axis out of three operating axes X, Y, Z of a triaxial operating lever 20 are used, and both axes X, Y take part in horizontal action. The derricking valve driving quantity, expansion valve driving quantity, turning valve driving quantity and bucket swing valve driving quantity are obtained by operation on the basis of horizontal operating direction and horizontal operating speed. At the time of setting a vertical operation mode, the X-axis and Z-axis out of three operating axis X, Y, Z of the triaxial operating lever 20 are used, but the Pot value of the X-axis is made invalid. On the basis of the vertical operation quantity, the derricking speed and expansion speed of a telescopic boom are computed to obtain the derricking valve driving quantity and expansion valve driving quantity, and the turning valve driving quantity is obtained on the basis of the turning operation quantity.
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