| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synthetic resin container that can increase the strength of a bottom wall against a fall. <P>SOLUTION: The synthetic resin container is formed in a cylinder shape with a bottom, which includes a cylindrical peripheral wall 11 and a disk-like bottom wall 12 closing a bottom-side end surface 11E of the peripheral wall 11. An arrangement plane GP being a plane including the bottom-side end surface 11E, is orthogonal to the axis of the peripheral wall 11. Further, a bottom-side surface of the bottom wall 12 has a convex shape toward the inside of the peripheral wall 11, and a first annular rib 13 being concentric with the bottom wall 12, and a second annular rib 14 being concentric with the bottom wall 12 and has a larger diameter than that of the first annular rib 13, project from the surface. The first annular rib 13 has a projection end not projecting to the bottom side beyond the bottom-side end surface 11E. The second annular rib 14 has a projection end not projecting to the bottom side beyond the projection end of the first annular rib 13, and substantially bisects the distance between the peripheral wall 11 and the first annular rib 13 in a radial direction of the bottom wall 12. <P>COPYRIGHT: (C)2013,JPO&INPIT |
