Door opening and closing apparatus, transfer apparatus, and storage container opening method

A transfer apparatus for transferring a transfer target object, the transfer apparatus comprising:

• a transfer room into which the transfer target object is transferred;
• a door opening and closing apparatus provided on a wall surface of the transfer room;
• and
• a transfer robot provided in the transfer room, the transfer robot being capable of putting in and taking out the transfer target object to and from between a storage container placed on a placing pedestal of the door opening and closing apparatus and the transfer room,
• wherein the door opening and closing apparatus is used for putting in and taking out the transfer target object to and from between the storage container capable of storing the transfer target object in an inner space thereof and the transfer room, the door opening and closing apparatus including:
• a plate-like frame that structures part of the wall surface of the transfer room and is provided with an opening for opening the transfer room;
• a door part capable of opening and closing the opening;
• the placing pedestal on which the storage container can be placed;
• a chamber having an inner space to be subjected to a purge process with an environmental gas;
• and
• a pressure adjusting part,
• wherein the chamber is provided at a position on the transfer room side so as to face the opening, and
• the pressure adjusting part causes the inner space of the chamber and the inner space of the storage container to communicate with each other using a route other than the opening.