| 摘要 |
PROBLEM TO BE SOLVED: To prevent a closing plate portion from being perfectly separated from a cylindrical portion in a container cap provided with an inner plug having a multiple thread.SOLUTION: A container cap 1 includes: an inner plug 2; a spout member 3 to be screwed to the inner plug 2 in a depressable manner; and a spout cap 4. The inner plug 2 includes: a cylindrical portion 21 having an external thread 22 on the periphery; a shoulder portion 24; and a cover portion 25 attachable to a container mouth V. A closing plate portion 23 for sealing a flow path 21a is formed in the cylindrical portion 21 in a breakable manner. A breaking cylinder 35 for breaking the closing plate portion 23 along with the depression of the spout member 3 to open the cylinder portion 21 is formed in the spout member 3 so as to communicate with a spout 31. The external thread 22 of the cylindrical portion 21 is composed of a multiple thread. The inner plug 2 includes a first projection 51. The spout member 3 includes a third projection 53. The first projection 51 and the third projection 53 are mutually engaged, whereby the spout member 3 is prevented from dropping off from the inner plug 2. |
