| 摘要 |
PROBLEM TO BE SOLVED: To make adoptable good quality resin while reducing the cost by saving resin to be used and molding dies and to make the most of a spherical body for a game tool except a super ball. SOLUTION: At the inner peripheral edge 2 of an upper semi-spherical body 1, a step part 3 is formed. At the inside axial center of the upper semi-spherical body 1, a tubular body 4 of a small outside diameter is integrally provided. At the outer peripheral edge 6 of a lower spherical body 5, a step part 7 of an outside diameter conformed to the step part 3 of the upper semi-spherical body 1 is formed. At the inside axial center of the lower spherical body 5, a tubular body 8 of a large outside diameter having an inside diameter to which the tubular body 4 of the upper semi-spherical body 1 is fitted is integrally provided. The step part 3 of the upper semi-spherical body 1, the step part 7 of the lower semi-spherical body 5, the outside diameter of the tubular body 4 of a small outside diameter and an inside diameter of the tubular body 8 of the large outside diameter coincide one another in the inside/outside diameter and are fitted by pushing. When the upper semi-spherical body 1 and the lower semi-spherical body 5 are fitted, a hollow spherical body having a through hole 9 at the center is made.
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