| 摘要 |
PROBLEM TO BE SOLVED: To visually and easily identify state and type of a connected device by providing a display part where display is automatically exchanged according to type of the device connected to its upper part. SOLUTION: An image forming device body (device body) 21 is loaded on an option feeder 1. When the lower part of the device body 21 presses down a bar shaped body 8, an actuation member, an arm member and a display plate 7 loss support from the bar shaped body 8 and rotate downward due to its own weight, exchanges the display from 7b to 7a, and displays that a certain type device body is loaded on the option feeder. When state of the lower surface of other type of device body 21 is altered, for example, an escaping hole part 13 is provided, and the device body 21 is loaded on the option feeder, the bar shaped body 8 is not pressed down by the device body, and keeps its position. Therefore, the display plate 7 abutting to the bar shaped body 8 also retains its initial condition and does not perform exchange of displays 7a, 7b. |
