| 摘要 |
PURPOSE:To improve safety by locking movement in the horizontal direction of a shielding plate so as not to be moved as a shutter device is left as it is positioned at a closed place when a drawer unit is pulled out. CONSTITUTION:A drawer unit 1 is housed in a unit chamber 9 in a freely put-in and pulled-out manner. A shielding plate 20 is moved by the engagement of a projecting section 17 formed to the lower section of the drawer unit 1 and a slit formed to the shielding plate 20 with the putting-in and pulling-out of the drawer unit 1, and an opening section 25 shaped to a bus cover 13 is opened and closed. A lock mechanism 18 operation in response to the projecting section 17 of the drawer unit 1 is installed. When the drawer unit 1 is pulled out, a lock member 19 is brought to a projected state, and the lock mechanism 18 locks movement in the horizontal direction of the shielding plate 20. When the drawer unit is inserted, the lock member 19 is pushed down by the projecting section 17, and locking to the shielding plate 20 is released. |
