| 摘要 |
PROBLEM TO BE SOLVED: To provide a shoulder cover which can hold the container securely and does not cause co-rotation of an inner cover when an outer cover is rotated on attachment or detachment.SOLUTION: A shoulder cover 30 of a container consists of an inner cover 40 and an outer cover 50. The inner cover 40 has an inner wall 41 coming in contact with an annular edge part 13 on the inside diameter side of the annular edge part 13 and an outer wall 43 positioned on the outside diameter side of the annular edge part 13 and provided with at least one notch 43d or one protrusion 43f to be capable of undergoing deflection deformation. The outer cover 50 has an inner peripheral wall 51 positioned on the inside diameter side of the inner wall 41 and an outer peripheral wall 53 pressing the outer wall 43 toward the annular edge part 13 by screwing in the fastening direction of the outer cover 50. The contact length ratio, in the circumferential direction, of the outer wall 43 of the inner cover 40 and the outer peripheral wall 53 of the outer cover 50 is smaller than the contact length ratio, in the circumferential direction, of the inner wall 41 of the inner cover 40 and the annular edge part 13. |
