| 摘要 |
PURPOSE: To provide a plug closing structure and method for which a normal plug-driving machine can be used when the bottle mouth of a bottle for carbonated beverage is closed with a plug body, and at the same time, a sure plug closed state can be maintained, and the plug can be safely and easily removed. CONSTITUTION: A multiple thread male screw 15 is provided on the external surface of a bottle mouth 2. In the meantime, an internal plug 6 made of a soft synthetic resin for which a cylindrical fitting part 3, which can be tightly fitted in the bottle mouth 2, and a skirt part 4 on the internal surface of which a multiple thread female screw 10, being fittable on the outside of the bottle mouth 2, is provided are integrally formed, is pressed to the bottle mouth 2, and the plug is driven in by making the multiple thread female screw 10 get over the multiple thread male screw 15. Then, a cylindrical external lid 7 made of a hard synthetic resin is pressed to the outside of the skirt part 4, and integrated to form a plug body 1. Then, by the ascent of the plug body 1 by a gas pressure in the bottle, the multiple thread female screw 10 is engaged with the multiple thread male screw 15, and the plug is sealed. While the plug can be sealed by driving without performing a positioning, the plug is unsealed by loosening the screwing between the multiple thread male screw 15 and the multiple thread screw 10, and the plug body 1 does not unexpectedly jump out by the gas pressure, at the time of unsealing of the plug, and the structure and method are extremely safe. |
