Paper sheet processing device, stacking tray, and paper sheet stacking method

A paper sheet processing device comprising:

• a bladed wheel configured to include a plurality of blades projecting radially around a rotary shaft, and a paper sheet holding space formed between the blades adjacent to each other to hold one received paper sheet, and sequentially emit one paper sheet each held in the paper sheet holding space to a predetermined stacking area at a time of rotation;
• a paper sheet supply/transport unit configured to supply paper sheets one by one to each of the paper sheet holding spaces of the bladed wheel which is rotating;
• a stacking tray arranged in the stacking area to stack thereon paper sheets emitted from each of the paper sheet holding spaces one by one and rotates around a rotary shaft;
• a stacked paper sheet-batch extraction area, which is a transfer destination of a batch of paper sheets stacked on the stacking tray and stores therein the batch of paper sheets in a state capable of taking out the batch of paper sheets;
• a drive mechanism;
• and
• a control unit configured to control the drive mechanism, wherein
• the stacking tray includes at least a first stacking part that stacks emitted paper sheets when at a paper sheet stacking position facing the bladed wheel and is rotationally moved to a non-stacking position not facing the bladed wheel when a predetermined number of paper sheets are stacked thereon, and a second stacking part that is moved to the paper sheet stacking position to stack thereon emitted paper sheets when being rotated by a predetermined angle from the non-stacking position not facing the bladed wheel, and is rotationally moved to the non-stacking position when a predetermined number of paper sheets are stacked thereon, and
• the first stacking part and the second stacking part are located in the stacked paper sheet-batch extraction area when each part is at the non-stacking position.