The present invention relates to store the tip side pendant in the desired folded state.
An operation support device 28 includes a first target angle of the boom and jib of interior angles, and the target angle storage unit 30 for storing a second target angle of smaller interior angle, and the controller 33, the command of the controller 33 comprising an instruction output unit 34 for outputting an operation instruction by. The controller 33 is tilted operation from the working state of the front attachment, if stably be performed at a first target angle causes the output instruction to ground the tip of the jib at a first target angle. On the other hand, if unstable, was allowed to ground the tip of the jib at a second target angle, and outputs an instruction to tension the front end side pendant from in the first target angle on the ground by operating lower the boom. As a result, the front attachment is always in a state where the tip of the jib in the first target angle is grounded and the front end side pendant was tense. Thereafter, the controller 33, boom and jib to output an instruction operation for horizontally.
.FIELD 1