| 摘要 |
PURPOSE:To obtain a low-cost plastic spit plug which allows easy loading and plug removal, as well as does not allow spillage of the content, if laid down. CONSTITUTION:A few pieces of flange 14 hemmed with a circular peripheral fringe 13 of the same outer diameter D centered around an axial center O-O are aligned in the direction of the axial center O-O, around the spit engagement part 12 of a spit plug 18, so that the flanges are allowed to protrude at right angles with the axial center O-O. Further, the ratio (m)(L/t) of the average thickness (t) of the fringe part 17 of each flange 14 running from an intermediate point 16 between the base 15 and the peripheral edge 13 of the engagement part 12 to the peripheral edge 13, and a distance (L) from the base to the peripheral edge 13 of the engagement part 12, is to be at least, 5 (m=L/t>=5). |
