SUPPORT STRUCTURE FOR VEHICLE SEAT

To provide a support structure for a vehicle seat, in which support rigidity can be improved by a riser member of simple configuration.SOLUTION: A riser member 40 has a support member 44 supporting a seat S whose front part and rear part are supported by a front leg member 46 and a rear leg member 48. The support member 44 has: an upper wall 56 abutting on a lower surface of the seat S; a pair of standing walls 58 suspending from both side edges of the upper wall 56; and an outer flange 59 extending from a lower edge of at least one of the pair of standing walls 58 toward outside of a cross-section of the support member 44. The seat S is highly rigidly supported since the lower surface is supported by the upper wall 56. The support member 44 remarkably improves its rigidity by having the upper wall 56 and the outer flange 59.SELECTED DRAWING: Figure 4 【課題】簡単な構成のライザー部材によって支持剛性を向上できる乗物用シートの支持構造を提供する。【解決手段】ライザー部材４０は、前脚部材４６及び後脚部材４８によって前部及び後部を支持されるシートＳを支持する支持部材４４を有する。支持部材４４は、シートＳの下面に当接する上壁５６と、上壁５６の両側縁から垂下した１対の立壁５８と、１対の立壁５８の少なくとも一方の下縁から支持部材４４の断面外側へ向けて延出する外フランジ５９とを有する。シートＳは、下面を上壁５６によって支持されることで剛性高く支持され、支持部材４４は、上壁５６及び外フランジ５９を有することで、その剛性が大幅に向上する。【選択図】図４