| 摘要 |
PROBLEM TO BE SOLVED: To secure falling prevention of by making it possible to make a work ing machine at the tip of an arm ground so that the arm and a wire do not interfere with each other when collecting materials and making it possible to certainly cope with tensile force of the wire. SOLUTION: A boom 4 is swingably provided on an under carriage 3 rotatably provided on a chassis 1, the arm 5 on the tip of which the working machine S such as a bucket, a gripper, etc., is installed to the boom 4 is free to oscillate, mounting a winch 7 to deliver and rewind the wire 6 on the under carriage 3, a pulley 10 to support the wire 6 from the winch 7 is furnished on either of the boom 4 or the arm 5, a support member 20 to support this pulley 10 is furnished, and this support member 20 is provided on either of the boom 4 or the arm 5 so that the pulley 10 is positioned outward except for the lower surface immediate under direction of the boom 4 and the arm 5.
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