| 摘要 |
PROBLEM TO BE SOLVED: To improve workability in demolishing work using a work device. SOLUTION: A cab elevation device 10 is provided at a position without hindrance for tilting action of a work device 21 on an upper revolving body 4, and a cab 7 forming an operation chamber is provided on the cab elevation device 10. An operator in the cab 7 can thus move the cab 7 to an upper positioned by the cab elevation device 10 to look over a wide range of a work site from a higher position while conducting demolishing work or the like of a building, thereby workability can be improved.
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