| 摘要 |
PROBLEM TO BE SOLVED: To provide a packing container superior in sealability and capping performance, by preventing flaw on a place of a container port part for passing an inner ring of a cap, and effectively preventing flaw on a seal part of the inner ring of the cap even when the container port part is flawed.SOLUTION: A step part is formed by forming an annular notch 4 on an inner peripheral surface on the tip of the container port part; a seal part 11a brought into close contact with a container port part inner surface is formed on an outer peripheral surface of an inner ring 11 of a cap 10 in a state of installing the cap in the port part by threadedly engaging a female spiral strip with a male spiral strip of the port part; two outer peripheral surfaces composed of an upper guide surface 11b and a lower guide surface 11c different in inclination angle to the container axial direction, are formed under the seal part 11a; and the inclination angle of the lower guide surface 11c is larger than the inclination angle of the upper guide surface 11b. |
