| 摘要 |
The invention is a resin backrest frame structure, in which side frames that extend in parallel on both sides and a cross frame that extends as a sheet across the upper parts of the two side frames are integrally connected and form an arch shape overall, and a production method therefor. The cross frame is formed as a sheet-shaped body, which connects at the upper part thereof to the two side frames on the back surface of the backrest and connects at the lower part thereof to the two side frames on the front surface of the backrest, and which is inclined with respect to the two side frames when seen in longitudinal cross-section. Reinforcing fibers have been disposed on the cross frame at least between the two side frames so as to extend continuously or discontinuously. The invention is able to improve the rigidity particularly of the cross frame while achieving a reduction in overall weight, makes possible the formation of a desirable load transfer pathway from the cross frame to the side frames, and makes possible an easy integral molding of the overall structure. |
