PAPER-SHEET STACKING APPARATUS

摘要

According to one embodiment, a paper-sheet stacking apparatus includes a holding unit, a pushing mechanism, a backup, and a variable-force spring mechanism. The holding unit has a stacking base for holding a plurality of paper sheets in standing position and is configured to stack the paper sheets, one laid on another in a direction of a plane. The pushing mechanism is configured to push paper sheets transported, into the holding unit. The backup opposed to the pushing mechanism, is able to move in the direction the paper sheets are stacked and is configured to hold any paper sheet stacked between the backup and the pushing mechanism and to move away from the pushing mechanism as paper sheets are stacked one after another.

主权项

1. A paper-sheet stacking apparatus comprising:
a holding unit having a stacking base for holding a plurality of paper sheets in standing position and configured to stack the paper sheets, one laid on another in a direction of a plane; a pushing mechanism configured to push paper sheets transported, into the holding unit; a backup opposed to the pushing mechanism, able to move in the direction the paper sheets are stacked and configured to hold any paper sheet stacked between the backup and the pushing mechanism and to move away from the pushing mechanism as paper sheets are stacked one after another; and a variable-force spring mechanism configured to bias the backup toward the pushing mechanism, to apply a first spring force to the backup while the backup is moving from the pushing mechanism by a first distance in a paper-sheet stacking direction, and to apply a second spring force smaller than the first spring force to the backup while the backup is further moving by a second distance in the paper-sheet stacking direction.