Patent ID: 7775556

Claim:
A frame structure for a working vehicle comprising: a pair of right and left side frames disposed parallel to each other, wherein the right and left side frames have an opened space between bottoms thereof, and wherein the right and left side frames are bent at respective vertically intermediate portions thereof so as to have respective upper portions extended vertically upward from the respective vertically intermediate portions to respective tops thereof, and to have respective lower portions extended slantwise from the respective vertically inter mediate portions to the bottoms downward and laterally inward toward each other, whereby a distance between the bottoms of the right and left side frames is narrower than a distance between the tops of the right and left side frames so that the right and left side frames have a boat-like shape in a front view; a pair of right and left front frames disposed parallel to each other, wherein each of the right and left front frames is integrally formed to comprise: a frame-connection portion, wherein the frame-connection portions of the respective right and left front frames are overlapped with front portions of the respective right and left side frames in a side view and are attached at respective insides thereof to the respective front portions of the right and left side frames; an axle-supporting portion extended forward and downward from the frame-connection portion; and a mast portion extended upward from the frame-connection portion, wherein the mast portions of the right and left front frames are connected to each other so as to serve as part of a mast for supporting a front loader; and a front plate extended between front edges of the right and left front frames so as to connect the right and left front frames to each other.