| 摘要 |
PROBLEM TO BE SOLVED: To facilitate extraction of a power supply unit from a body casing.SOLUTION: A fiber tray 3 is rotatably mounted around a rotation axis S2 in the vertical direction on a body casing 2, and opens and closes an opening 2a of the body casing 2 by being rotated around the rotation axis. In a state where the fiber tray 3 is opened, a power supply unit 5 can be taken out from within the body casing 2 without taking out the fiber tray 3 from the body casing 2. Between the fiber tray 3 and the body casing 2, holding means M1 is provided which holds the fiber tray 3 in an opened state. |
