| 摘要 |
PROBLEM TO BE SOLVED: To correct a column accurately to the plumn positioning without troublesome correcting operation even in the case installed on a slope, avoid a hazard of tumbling certainly, and widen the place serviceable. SOLUTION: This height lift working machine is equipped with a column 3 whose bottom 3d is supported on a supporting base part 2 in such a way as capable of tilting, a plurality of expansive actuators 5a and 5b set over between the column 3 and base part 2 and arranged on the column 3 in its different positions in the circumferential direction, pressure sensors 6a and 6b to sense the loads applied from the column 3 to the actuators 5a and 5b, and a control part to make drive control of the actuators 5a and 5b so that the sensed pressure values from the pressure sensors 6a and 6b become identical.
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