| 摘要 |
PROBLEM TO BE SOLVED: To put balls into a container from outside, even when it stays uncapped by providing an opening on the cap with a size which the balls can pass through and by inclining the surface of the cap which is adjacent to the opening so that the balls put on them can run into inside the box. SOLUTION: A long slender opening 2 is longitudinally made at the near center of the cap 1. Since this opening 2 is for dropping the balls which are thrown onto the cap 1 into the accommodation box, the width of the opening 2 is formed to a size the balls can pass through there. The cap surface 3 which is adjacent to the opening 2, is inclined so that the balls on the cap surface can run toward the opening 2 via the effect of this inclination. In this case, since the opening 2 is made at the center of the cap, the cap surface 3 which is adjacent to the opening 2 consists of four surfaces, 3a, 3b, 3c, 3d that are all inclined. |
