| 摘要 |
PURPOSE:To stabilize a work obtaining a great contact resistance, by a method wherein a side rigger which is long in the front and rear direction and wide and large in contact face area is provided outside a running gear of crawler system. CONSTITUTION:A front rigger 20 and side riggers 27, 27 are provided, and the front rigger 20 is put in contact with earth by moving a supporting arm 19 rotationally with an oil pressure cylinder. Then, by the side riggers 27, 27, bent arms 23, 23 are rotationally moved and a contact plate 24 is projected outside. And via a connecting rod 25, supporting cylinders 22, 22 are rotationally moved by the oil pressure cylinder 26 with brackets 21, 21 as the central points, and the contact plate 24 is put in contact with earth outside a running gear 2 and a machine unit is supported. As the result, vehicle body is supported even on soft mud in a stable state, and on-ground-surface soil can be dug out with a bucket section, and the soil can be moved to the sides of the machine unit and the soil whithdrawal work can be efficiently carried out. |
