| 摘要 |
PROBLEM TO BE SOLVED: To provide an operator with a wide field of view in a construction machine conventionally where the field of view could be provided only within a limited range since a position of a cab was fixed. SOLUTION: In poles 23a-24b with one ends rotatably attached on a platform 22, other ends are rotatably attached to a sub platform 25 and they horizontally support the sub platform 25 mounted with the operator cab 26. In a slide cylinder 28 extended between the platform 22 and the sub platform 25, one end is rotatably attached to the platform 22 and another end is rotatably attached to the sub platform 25. Since the operator cab 26 is moved along a circular arc defined by lengths of each pole 23 and 24 in a position protruding from a tip of the platform 22 by extension and contraction of the slide cylinder 28, the field of view of the operator 27 can be moved and secured in the same position. |
