The invention relates to a closing device for a container of medium or relatively large opening, such as a canister or a barrel made of plastic or wood, to be used in individual household for storing e.g. pickles or sour cabbage. According to the invention, the device consists of a fixed annular framework (b) and some upper and lower fins (a and c), respectively, placed onto and under the framework, respectively, and articulated thereto by some equally-spaced rivets (d).
