Impeller mechanism, paper stacking and delivering device, and method for processing paper sheets

A stacking wheel mechanism for use in a paper sheet stacking and feeding apparatus for stacking a paper sheet in a stacking unit and feeding out the paper sheet from the stacking unit, comprising:

• a transport path along which the paper sheet passes during both of stacking the paper sheet in the stacking unit and feeding out the paper sheet from the stacking unit;
• a stacking wheel arranged near the stacking unit so as to be rotatable in both of a feeding-in direction of the paper sheet toward the stacking unit and a feeding-out direction of the paper sheet from the stacking unit, the stacking wheel having a plurality of elastic blades on an outer circumferential surface thereof;
• and
• a blade guiding member that is arranged near the stacking wheel to guide the blades of the stacking wheel such that the blades enter into the transport path when the stacking wheel rotates in the feeding-in direction of the paper sheet toward the stacking unit and the blades retreat from the transport path when the stacking wheel rotates in the feeding-out direction of the paper sheet from the stacking unit wherein
• the blade guiding member is fixedly provided so that the blade guiding member does not move.