| 摘要 |
PROBLEM TO BE SOLVED: To prevent part of the woven fabric of a cushion body from being excessively tensed and slackened by load impartation. SOLUTION: This cushion body 2 is constituted by integrally and successively providing an outer peripheral frame part 5 made of a synthetic resin with the outer peripheral end of the woven fabric 6 having flexibility and elasticity. The part nearer the bore than the outer peripheral frame part 5 is provided with reinforcing bodies 7 consisting of a pair of rib parts 7a and 7b integrally connected to the woven fabric 6 and thin successive provision parts 7b between both rig parts 7a and 7a. The thin successive provision parts 7b of the reinforcing bodies 7 are cut off together with the woven fabric 6 so that the free ends are formed. Then, the woven fabric 6 is interrupted by the disconnected thin successive provision parts 7b and, therefore, the excessive tensing and slackening by the load impartation do not occur and the surface of the woven fabric 6 is easily made to comply with a three-dimensional curvilinear surface.
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