Paper sheet stacking apparatus

Abstract

A paper sheet stacking unit (paper sheet stacking apparatus) includes a coil provided in a stacking space with an axis of the coil intersecting an expected stacking surface and a bottom end of the coil being in proximity to the expected stacking surface. The coil spins about the coil axis, while holding a rim of an entering bill, to move the entering bill toward the expected stacking surface, and then releases the hold of the rim of the entering bill to stack the bill on the expected stacking surface. The coil also presses the bills stacked on the expected stacking surface. That is, the coil has both functions of guiding unit and pressing unit of bills.

What is claimed is: 
     
         1 . A paper sheet stacking apparatus comprising:
 a feeding unit that feeds a paper sheet into a space for stacking paper sheets therein; and   a guiding unit that moves the fed paper sheet, while holding a rim of the fed paper sheet, toward an expected stacking surface where the fed paper sheet is stacked and releases the hold of the rim of the fed paper sheet to stack the paper sheet on the expected stacking surface, wherein   the guiding unit includes a first coil provided in the space so as that an axis of the coil intersects the expected stacking surface and one of ends of the coil is in proximity to the expected stacking surface.   
     
     
         2 . The paper sheet stacking apparatus according to  claim 1 , wherein
 the guiding unit is configured that an other end of the first coil holds a rim of the fed paper sheet with the axis of the coil intersecting the rim of the fed paper sheet, the rim of the fed paper sheet is moved to the end of the first coil by the coil spinning about the axis, the hold of the rim of the fed paper sheet is then released, and the other end of the first coil presses paper sheet stacked on the expected stacking surface with an elastic force of the first coil.   
     
     
         3 . The paper sheet stacking apparatus according to  claim 1 , wherein
 the guiding unit includes a second coil wound in an opposite direction to the first coil to hold an other rim of the fed paper sheet, and   a distance between the axis of the first coil and an axis of the second coil is larger than a value calculated by subtracting a sum of a radius of the first coil and a radius of the second coil from a width of the paper sheet to be stacked, though the distance is smaller than the width of the paper sheet to be stacked.