Patent ID: 8375998

Claim:
A gas supply pipe unit used for a lid opening/closing system, wherein the lid opening/closing system inserts and removes an object to be contained by removing a lid from a storage container to open an opening of the storage container, the storage container comprising a main body capable of containing therein the object to be contained and having the opening in one surface thereof, and the lid capable of being separated from the main body for closing the opening to form airtight space together with the main body, the lid opening/closing system comprising: a mount base on which the storage container is mounted; an opening portion adjacent to the mount base and facing the opening; and a door capable of holding the lid and capable of closing the opening portion, the door connecting the opening and the opening portion by opening the opening portion while holding the lid, the gas supply pipe unit comprising: a curtain nozzle located outside a first side that is one of sides of the opening portion on the side opposite to the side where the mount base is located with respect to the opening portion and capable of ejecting inert gas substantially linearly toward a second side opposite to the first side; and an inert gas supply nozzle which is located at a side of the storage container relative to the curtain nozzle and which is adapted to eject inert gas through the opening portion and the opening toward an inside space of the storage container without having any component of gas flow directing toward the inert gas flow ejected from the curtain nozzle.