Mobile crane

A mobile crane comprising:

• a crane main-body having a lower traveling body capable of self-traveling in a front-back direction and an upper swing body mounted on the lower traveling body to be capable of swinging;
• a coupling beam extending from the upper swing body to a back side of the upper swing body;
• and
• a counterweight carrier coupled to the upper swing body via the coupling beam and movable according to movement of the crane main-body in a state in which a counterweight is mounted on the counterweight carrier, wherein
• the counterweight carrier has a wheel rotatable in both directions about a horizontal axis, a wheel driving device which rotates the wheel, and a steering device which swivels the wheel about a vertical axis to steer the wheel,
• at least one of the crane main-body and the counterweight carrier has a posture instructing section configured to be operated to issue an instruction for causing the wheel to take a traveling posture with respect to the crane main-body during traveling the crane main-body, the traveling posture being a specific posture which the wheel takes by swiveling about the vertical axis, and a controller which causes the steering device to steer the wheel such that the wheel takes, as the traveling posture, a posture in which an orientation of the wheel corresponds to a front-back direction of the lower traveling body according to a swing state of the upper swing body when the posture instructing section is operated to issue the instruction for causing the wheel to take the traveling posture, and
• the controller causes the steering device to steer the wheel by a steering operation which requires a smaller steering amount of the wheel between one steering operation and another steering operation, one steering operation being a steering operation in which the steering device swivels the wheel in one direction about the vertical axis to make the orientation of the wheel correspond to the front-back direction of the lower traveling body, another steering operation being a steering operation in which the steering device swivels the wheel in a direction opposite to the one direction about the vertical axis to make the orientation of the wheel correspond to the front-back direction of the lower traveling body.