| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a chair that does not cause deterioration in appearance even when a sink mark is generated on beams of a load support body during molding.SOLUTION: A side 7c which is a pair of left and right beams of a load support body includes: a side body part 7c-1 having an extension width in a substantially longitudinal direction; and a reinforcement rib 7c-2 protruding from one end in a width direction of the side body part 7c-1 toward the load support body side. The side body part 7c-1 is formed in a cross-sectional shape with a thickness of a front-and-rear direction gradually reduced from one side in the width direction with which the reinforcement rib 7c-2 is formed toward the other side. Even when a sink mark is generated in a portion corresponding to a projected part of the reinforcement rib 7c-2 on the back face of the side body part 7c-1, the sink mark does not become deep rapidly.</p> |
