| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve workability in demolishing work or the like using a work device. SOLUTION: A first boom 22 and a second boom 24 are formed to be bent at center parts of their length to form a bent part roughly in a deglegged shape, a base end part of a second boom cylinder 36 is installed on a recessed part 22C in the bent part of the first boom 22, and a tip part of the second boom cylinder 36 is installed on a recessed part 24B in the bent part of the second boom 24. A work attitude of the second boom 24 extended from the first boom 22 can thus be formed as the second boom cylinder 36 is extended. Work reaction force applied on the second boom 24 through a grapple device 33, an arm 30, etc., can thus be received by the extended second boom cylinder 36 with sufficient force, and the second boom 24 can be held at a correct work attitude, thereby demolishing workability or the like can be improved.</p> |
