| 摘要 |
<p>A bending member includes a bent portion formed by bending a plate material, the bent portion including a concave surface side and a convex surface side, a curvature radius r of the concave surface side of the bent portion being set to a thickness t of the plate material or below, and a plurality of grooves provided in the bent portion on the convex surface side, each of the grooves being vertical to a longitudinal direction of the bent portion, wherein each of the grooves opens on both surface sides sandwiching the bent portion, and each of the grooves includes a bottom portion having a straight line shape connecting the openings of the groove on the both surface sides.</p> |
