Patent ID: 8794622
Filing Date: 2014-08-05
Classification: B65H

Abstract:
1. A sheet stacking device comprising: a sheet stacking unit provided in a body and configured to be movable upward and downward and to stack the sheets discharged by a discharge portion; an elevation unit configured to raise and lower the sheet stacking unit; a door provided on the body and configured to be opened when sheets stacked on the sheet stacking unit are removed; a detection portion configured to detect the door being open; a drive source configured to drive the elevation unit; and a transmission unit transmitting a driving force of the drive source to the elevation unit to raise and lower the sheet stacking unit, the transmission unit comprising: wherein, in a state where the door is closed, the actuating portion releases the lock portion from the ratchet to transmit the drive force to the elevation unit to raise and lower the sheet stacking unit via the drive force transmitting route, and in a state where the door is open, the actuating portion brings the lock portion into contact with the ratchet to transmit to the elevation unit only the driving force to lower the sheet stacking unit via the drive force transmitting route.