Tray unit assembly

A tray unit assembly, comprising:

• a housing;
• a separating/stacking unit including a separating roller unit and a stacking roller unit provided in the housing;
• and
• a tray unit provided to be inserted into the housing, the tray unit having a media stacking space formed therein,
• wherein the tray unit includes a first tray body configured to horizontally reciprocate between the housing and a deposit/withdrawal unit for receiving an inputted medium, a second tray body vertically movably installed on the first tray body and configured to reciprocate between the separating roller unit and the stacking roller unit, and a clamping plate vertically movably installed on the second tray body, and
• wherein when the clamping plate is raised, the media stacking space is defined between the clamping plate and the second tray body and, when the clamping plate is lowered, the clamping plate presses media stacked in the media stacking space.