| 摘要 |
PROBLEM TO BE SOLVED: To easily regulate the concentration of the atmospheric gas in a box by providing a partitioning member to partition first and second storage containers, plurality of vent holes which are formed in storage container bodies and regulate' the concentration of the atmospheric gas in the storage container bodies, and a shield plate to cover the vent holes. SOLUTION: A shelf part 15 to hook a partitioning member 13 to partition a box body 3 into two storage parts is provided inside a box body 3 in an approximately parallel manner to a box bottom part 3c. One hundred vent holes 5 are arranged in a lid 3a in a rectangular shape. A shielding plate 9 is provided on the lid part 3a, and formed of the similar material to that of the box body 3, and of the size capable of covering all vent holes 5. The whole shape is rectangular, and is provided with rectangular open windows 9a of different size. These are used to regulate the number of the vent holes 5 to be shielded by sliding the shielding plate 9 to change the installation position of the shielding plate 9. The concentration of the atmospheric gas can be easily regulated thereby. |
