| 摘要 |
PROBLEM TO BE SOLVED: To improve machinability in the vicinity of a container opening to improve productivity of containers and also increase freedom in a container opening shape to provide good sealability between the opening and a lid member. SOLUTION: The closing structure for a container opening comprises a flat seal face 18 formed by molding an internal periphery of an opening 17 provided on a container to protrude outwardly from the container along an entire periphery, a coupling plate 19 formed with a plurality of female screws 20 surrounding an outer peripheral side of the seal face 18 fixed from outside the container, and a base plate 24 being a lid member formed with screw insertion holes 32 for aligning with the female screws 20 in position. A seal member 35 is interposed between the base plate 24 and the coupling plate 19, and the base plate 24 is coupled with the female screw 20 of the coupling plate 19 by a screw member 34. |
