| 摘要 |
PURPOSE:To continuously do two kinds of working by only one civil work machine by a method in which a stick boom is provided to the tip of a boom in a freely reversible manner and two kinds of working machines are attached to both ends of the stick boom. CONSTITUTION:A forked part 6 is provided at the tip of the boom 4 of a civil work machine 1, a stick boom 7 is roatatably provided through a support shaft 8 between the forked section, and a rock drill 9 and a bucket 10 are attached to both ends of the stick boom 7. When extending hydraulic cylinder 13, the stick boom 7 is turned through a link arm 12 and the bucket 10 projects to the direction of the tip part. Under the condition, oil-pressure mechanisms 5, 11 and 13 are operated and excavation is made by the bucket 10. When shrinking the hydraulic cylinder 13, the stick boom 7 turns in such a way as to move the bucket 7 upwards and the rock drill 9 projects toward the direction of the tip part. Thus, excavation by the rock drill 9 is made possible. |
