To set the center of shearing of a torsion beam at a high position while securing torsional rigidity.
The torsion beam is arranged so that a top part 106 is positioned on a higher side relative to an opening side end part 108A and an opening side end part 108B. An upper sheet 110 and a lower seat 112 respectively have an upper thick sheet part 114 and a lower thick sheet part 116 in a region in the vicinity of the top part 106 (top part region) including the top part 106, and respectively have an upper thin part 118A and an upper thin part 118B and a lower thin part 120A and a lower thin part 120B in regions in the vicinity of the opening side end part 108A and the opening side end part 108B (opening side end part regions) including the opening side end part 108A and the opening side end part 108B. The upper sheet 110 and the lower seat 112 form a continuous closed cross-sectional construction at the opening side end part 108A and the opening side end part 108B.
HIRANO TAKASHI
Yusuke Murata
Tomoyuki Miki
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