| 摘要 |
PURPOSE:To reduce the weight of a vehicle by a method in which a working machine with a boom and an arm is provided for the front of a vehicular body capable of freely traveling on its crawler and the attachment of a driver capable of straightline-advancing and retracting is attached to the tip of the working equipment. CONSTITUTION:A power chamber 4 is provided for a place behind the gravity center position of a vehicular body 1 of construction equipment capable of freely traveling by the foot 2 of a crawler 3 formed of an endless rubber. The body 1 and the working machine 7 are operated by an operator 6. An attachment 16 is attached to the tip of an arm 12 connected to a boom 10 pivotally supporting the machine 7. The tip of a chisel 16a is positioned on a drill position by turning the boom 10 and the arm 12. The boom 10 and the arm 12 are then fixed and the attachment 16 is straightline-advanced forward and backward for drilling work. The drill work can thus be performed without applying bending forces to the chisel 16a of the attachment 16.
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