| 摘要 |
PROBLEM TO BE SOLVED: To provide a crawler working machine allowing a horizontal level to be timely adjusted so as to smoothly turn, for eliminating accident factors, since risks increase if a turning movement applies a boom with an additional lateral load in a time of instability, when, in a crane work, the hoisted load acts directly downward along the plumb line, a slight tilt of the turning body causes the load and the plumb line of a hook to act on the outside of the boom width in a long boom, so that a compression force more than permission is applied on one tilted side and a tensile force is applied on the other side. SOLUTION: To achieve the objective above, jack boxes each provided with a jack cylinder are equipped on the front and rear sides and right and left sides of a center frame where the turning body is turnably disposed. Each of a pair of crawler frames provided with a crawler is equipped with penetrating portions, into which the jack boxes are inserted so as to configure a traveling body. The extension and contraction of the jack cylinder slides the jack box vertically, so as to adjust the horizontal level of the turning body. COPYRIGHT: (C)2011,JPO&INPIT |
