Image Number 12 for United States Patent #7677646.
The vehicle frame for a work vehicle includes a cabin frame that is assembled into a substantially box form. A base frame is welded to the cabin frame. The cabin frame includes left and right side frames, each of which is formed into a loop. The cabin member includes a plurality of cross members for connecting the left and right side frames. Each of the side frames is formed with a single one-piece pipe material having a first end and a second end with the first end connected to the second end such that a tangential direction extending along a region of the first end coincides with a tangential direction extending along a region of the second end. The pipe material has an irregular shape having a recess formed along the entire length between the first end and the second end of the pipe material.