Article storage facility

1. An article storage facility, comprising:

a storage structure;

one or more storage racks provided inside the storage structure and configured to store storage containers;

a first support station provided inside the storage structure and configured to support a storage container of the storage containers;

an internal transport device configured to transport storage containers, one storage container at a time, between the one or more storage racks and the first support station;

a second support station provided outside the storage structure and configured to support a transporting container; and

an article transfer device;

wherein the transporting container is a container that is used to transport articles outside the storage structure, and is configured to hold a plurality of articles therein,

wherein the storage container is a container that is used to transport and store articles inside the storage structure, and is configured to hold a plurality of articles with greater holding efficiency than the transporting container, and

wherein the article transfer device is configured to transfer articles, one or more articles at a time, between the storage container placed on the first support station and the transporting container placed on the second support station.

2. The article storage facility as defined in claim 1 , wherein the one or more storage racks have a set number of storage locations each configured to store the storage container, and

wherein either (a) a non-empty storage container which is a storage container with articles held therein, or (b) an empty storage container which is a storage container with no articles held therein is stored at each of the set number of storage locations.

3. The article storage facility as defined in claim 1 , wherein each storage container is formed to have a generally box shape that is capable of enclosing articles, and

wherein each transporting container has a main body portion having a generally box shape that is capable of enclosing articles, and a flange portion, for transporting purposes, which is formed to protrude from the main body portion.

4. The article storage facility as defined in claim 1 , wherein each article has one or more portions or materials that require a specific atmosphere containing gas having specific composition to maintain required quality, and

wherein the article storage facility further comprises one or more gas supply systems each of which is configured to supply gas having the specific composition to have the specific atmosphere containing gas having the specific composition.

5. The article storage facility as defined in claim 4 , wherein each transporting container has a structure that allows the transporting container to have a greater hermetically sealing capability than the storage container.

6. The article storage facility as defined in claim 1 , wherein the second support station is configured to receive the transporting container from an external transport device configured to transport transporting containers, one transporting container at a time, outside the storage structure.

7. The article storage facility as defined in claim 6 , wherein the external transport device is configured to transport an empty transporting container, that is the transporting container from which articles are removed by the article transfer device and is empty, from the second support station to a transport target location located outside the storage structure.

8. The article storage facility according to claim 1 , wherein

the storage container is capable of holding the same number of articles as the number of the articles the transporting container is capable of holding, and

the volume occupied by the storage container is less than that of the transporting container.

9. The article storage facility according to claim 8 , wherein

each of the transporting container and the storage container is formed to have a rectangular shape in plan view, and

the storage container is formed to be smaller than the transporting container in terms of both a dimension along each side as seen in plan view and a vertical dimension.