Patent ID: 8620204

Claim:
A print-medium storing apparatus which is installed on a discharge path of a print-medium in an image forming apparatus, comprising: a plurality of storing units which are arranged with a multi-layer configuration; a controller to control a drive of a feeding unit of a storing unit arranged between another storing unit through which the print-medium is to be discharged and the image forming apparatus, by controlling a second driving source of the another storing unit through which the print-medium is to be discharged; and a power transmission unit which transmits a driving force of a first driving source to the feeding unit including: a plurality of gears which transmit the driving force of the first driving source; a first power switching unit which transmits the driving force of the first driving source connected thereto to the plurality of gears and the feeding unit, and prevents a second driving force of the second driving source of the another storing unit from being transmitted to a discharging roller connected to the storing unit; and a second power switching unit disposed on a shaft which transmits a driving force of the second driving source of the another storing unit via a first gear mounted on the shaft to a feeding roller of the storing unit, and prevents the driving force of the storing unit from being transmitted from a second gear mounted on the shaft to the first gear and to the another storing unit.