PROBLEM TO BE SOLVED: To protect an operator inside a cab with a sufficient rigidity by suppressing the deformation of a rear space in the cab when a vehicle is turned over.
SOLUTION: Left and right upper pillars 27 and 28 positioned on the ceiling side of a cab frame 12 are formed of left and right upper extension members 29 and 30 installed extendedly from the upper end side to the rear side of the left and right front pillars 22 and 23 and left and right connection members 31 and 32 connecting the rear end sides of the upper extension members 29 and 30 to the upper end sides of left and right rear pillars 24 and 25. Left and right connection members 31 and 32 are formed in solid beam members by a casting or forging means. Also, beam members 33 and 34 apart a distance in the longitudinal direction and extending in the lateral direction and having both ends joined to the connection members 31 and 32 by welding are installed between the connection members 31 and 32.
COPYRIGHT: (C)2006,JPO&NCIPI
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