| 摘要 |
PROBLEM TO BE SOLVED: To propose a synthetic resin inner stopper prevented from being drawn out, by fitting a peripheral wall 8 over an outer periphery of a neck 5 of a container body 2 and causing an engaging protrusion 9 provided to protrude on an inner peripheral surface of the wall 8 to come beyond a locking protrusion 6 provided along the outer periphery 5 of the neck 5 to be engaged wherein the inner plug is tightly fixed to the container body during use, it can be easily removed when disposing of for classification disposal, and the plug is simple in structure and inexpensive to manufacture. SOLUTION: The engaging protrusion 9 is formed as a non-annular form with a part notched, and a through hole 16 which passes longitudinally through a peripheral wall 8a at the part where the engaging protrusion is not formed is bored. An internal wall below the through hole is constructed as an engaging piece 18 which can be elastically and swingably deformed in inward and outward directions wherein a protrusion 17 on an internal face is brought beyond the locking protrusion 6 to be engaged. In addition, a fitting plate 20 which is tightly fitted into the through hole 16 for locking the engaging piece 18 is provided so that it can be drawn out via an elastic strip 21 with an end coupled with the peripheral wall. |
