| 摘要 |
PURPOSE:To prevent the falling down of excavator vehicle by extending a counter weight when extending the excavating mechanism by a method in which the excavating mechanism such as back-hoe, etc., is provided to the front of a slewing base and the counter weight is provided in a reciprocally movable manner in the rear of the slewing base. CONSTITUTION:A slewing base 14 is provided on a traveling body 10 in a turnable manner, and a working base 20 is rotatably provided on the slewing base 14 by biasing it from the turning center of the base 14. The slewing base 14 and the working base 20 are synchronously turned in mutually opposite directions. The working base 20 is provided with an excavating mechanism such as back- hoe, etc., and a counter weight 51 is provided in a horizontally and reciprocally movable manner on the opposite side of the working base 20 side of the slewing base 14. When the excavating mechanism is extended, the counter weight 51 is extended backwards, thereby preventing the falling down of the vehicle. |
