| 摘要 |
PROBLEM TO BE SOLVED: To improve the surface rigidity of a seat with a light weight and without damaging sitting comfort. SOLUTION: A cushion material 20 is supported by the net material 10 of three-dimensional structure, which is combined integrally, in a state where the material 10 is impregnated with urethane resin constituting the material 20. Thus, the surface rigidity sufficient to protect a crew from a shock can be shown by the material 10. Since an iron plate, etc., is not used as against a conventional structure but the material 3 of the three-dimensional structure is used, a weight is light and the material 10 can follow the shape variation of the material 20, thereby sitting feeling is not damaged.
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