Patent ID: 8485525

Claim:
A sheet-stacking apparatus comprising: a conveying portion configured to convey a sheet; a plurality of stacking portions on which a sheet conveyed by the conveying portion is stacked, and which can be taken out from a main body of the sheet-stacking apparatus by a single dolly; an elevating device configured to individually move the plurality of stacking portions up and down relative to the single dolly, wherein the elevating device includes support members capable of supporting each stacking portion; and a controller configured to control the elevating device and to control the plurality of stacking portions so that sheets are one of stacked on each stacking portion of the plurality of stacking portions and stacked across two or more stacking portions of the plurality of stacking portions, wherein the controller controls the elevating device so that the support members are moved down below a support surface of the single dolly to pass onto the single dolly each stacking portion across which a sheet is stacked and to pass onto the single dolly the sheets that are stacked on each stacking portion or the sheets that are stacked across the two or more stacking portions.