| 摘要 |
A vehicle body structure (1) provided with a roof body structure (10), side body structures (20), an underframe (40), and bolster beams, the bolster beams being provided to the lower surface of the underframe (40) and joining travel devices, is configured in such a manner that man-hours for manufacturing the vehicle body are reduced by eliminating through-pipes and modularizing wiring and piping. At positions close to the ends of the underframe (40) in the longitudinal direction (120), there are provided center bolster beams (47) at the center of the underframe (40) in the widthwise direction (110) and there are also provided end bolster beams (48, 48) at both ends of the underframe (40) in the widthwise direction (110). The center bolster beams (47) and the end bolster beams (48, 48) are constructed from hollow extruded shape materials each having two opposing surface plates and also each having ribs for connecting the surface plates, the two opposing surface plates and ribs being formed by hollow extrusion molding. The center bolster beams (47) are arranged so that the extrusion direction thereof is aligned with the widthwise direction (110), and the end bolster beams (48, 48) are arranged so that the extrusion direction thereof is aligned with the longitudinal direction (120). As a result of this configuration, modularized wiring and piping can be passed through between the ribs which are formed within the end bolster beams (48, 48) and which extend in the longitudinal direction. Consequently, the rigidity of the bolster beams is improved and man-hours for manufacturing the vehicle body are reduced. |
