| 摘要 |
PROBLEM TO BE SOLVED: To provide a sleeve not generating such a phenomenon that engagement is released easily, and thereby a cylindrical sleeve is opened, released from a packaged article and detached.SOLUTION: In a sleeve having a pair of insertion pieces for engagement provided on one end, and a pair of slits for engagement into which the insertion pieces for engagement are to be inserted, and which is provided on the other end side, and becoming cylindrical by insertion of the insertion pieces for engagement into the slits for engagement, a notched part having a widened width is provided on the root between the pair of insertion pieces for engagement, and when the insertion pieces for engagement are inserted into the slits for engagement, the notched part is locked with a connection part between the pair of slits for engagement. |
