Abstract: A storage chamber means is shown having a chute for communicating between the outside and the storage area wherein the chute is designed to cooperate with an entrance aperture in a wall to permit articles to be fed into the storage chamber through the chute, yet the chute substantially seals the entrance to the chamber against removal of articles from the chamber once they have been delivered into the storage area through the aperture. The chute is also designed to be collapsed into a compact panel and hinged into out of the way position for covering the entrance aperture and locked in place from the inside of the chamber to close the aperture against unauthorized opening whereby to provide a secure storage facility having a maximum of storage space in this mode of use which space is unencumbered with a chute structure.