| 摘要 |
PROBLEM TO BE SOLVED: To release the reinforcing action of a vertically hung wall by a method wherein a cylindrical reinforcing wall which surrounds the vertically hung wall is connected to the vertically hung wall with a narrower width connecting part of a specified width, and a major breaking line which extends to the connecting part is formed on the reinforcing wall, and the narrower width connecting part is made to be an easily breakable thinner region. SOLUTION: A cylindrical reinforcing wall 43 is arranged in a manner to surround a cylindrical vertically hung wall 42, and a male thread 431 is formed on the outer periphery. For the cylindrical reinforcing wall 43, the lower end is connected to the lower end of the cylindrical vertically hung wall 42 with a narrower width connecting part 47. The width S of the narrower width connecting part 47 is set to be 0.2-0.8 mm. For the cylindrical reinforcing wall 43, a major breaking line which extends from the upper end to the narrower width connecting part 47 is formed at a location being adjacent to a non- breakable thick region of a thinner easily breakable region. By this method, a lid main body 4 can be easily removed from the mouth part of a container. |
