Patent ID: 8684198

Claim:
A working machine, comprising: a base machine; a working attachment including a base-end boom which is mounted on the base machine to be movable up and down, a lead-end boom which is mounted on a lead end of the base-end boom to be pivotally movable about a horizontal axis, an arm which is mounted on a lead end of the lead-end boom to be pivotally movable about a horizontal axis, and a working device which is mounted on a lead end of the arm, the working attachment being collapsible into a triple-folded state, with the base-end boom being located on the upper side and the arm being located on the lower side with respect to the lead-end boom, as a posture of the working machine for transport; at least one lead-end boom cylinder which is disposed between the base-end boom and the lead-end boom at an attachment inner position corresponding to an inner side of the working attachment in the transport posture, and which is operable to pivotally move the lead-end boom with respect to the base-end boom; and at least one arm cylinder which is disposed between the lead-end boom and the arm at the attachment inner position, and which is operable to move the arm with respect to the lead-end boom, wherein the lead-end boom includes at least one first lead-end boom cylinder attachment portion for mounting the lead-end boom cylinder, and at least one first arm cylinder attachment portion for mounting the arm cylinder, the at least one first lead-end boom cylinder attachment portion is disposed at a position different from the at least one first arm cylinder attachment portion in a widthwise direction of the working attachment, and disposed at a position closer than the at least one first arm cylinder attachment portion with respect to the lead end of the lead-end boom in such a manner the at least one first lead-end boom cylinder attachment portion is below the at least one first arm cylinder attachment portion in the transport posture, the lead-end boom cylinder and the arm cylinder are disposed at such positions that the lead-end boom cylinder and the arm cylinder intersect with each other in an X-shape in side view of the working attachment, one cylinder is provided for one of the lead-end boom cylinder and the arm cylinder, the one cylinder being disposed at a middle position in the width direction of the working attachment, and two cylinders are provided for the other one of the lead-end boom cylinder and the arm cylinder, the two cylinders being disposed at both sides of the one cylinder in the width direction of the working attachment, with the one cylinder being interposed between the two cylinders.