| 摘要 |
PROBLEM TO BE SOLVED: To provide a hinge cap made of synthetic resin including a structure preventing deterioration of airtightness or fitting strength caused by abnormal deformation of rolling or the like during forming in a fitting protruding part circularly projecting in an inner circumferential surface lower part and engaging with a cap body in regard to an upper lid of a hinge cap provided with a cutout recessed part facilitating bending deformation of a hinge in an outer circumferential surface.SOLUTION: A hinge C connecting a cap body A and an upper lid B attached to a container includes a center hinge part 30 connecting an upper end edge of the cap body and a lower end edge of the upper lid in a circumferential center part; and both side hinge parts 31 provided in both sides of the center hinge part, and carrying out connection in a vertically separated position via cutout recessed parts 32 reduced in diameter from the upper end edge and the lower end edge. A slope 36 slanted toward the lower end edge such that a width in a radial direction of the cutout recessed part is broadened to form a draft is provided in an outer circumferential recessed face 35 forming an outer circumferential surface in the cutout recessed part of a side circumferential wall of the upper lid. |
