JP2008184311A5 - - Google Patents

Claims (10)

Stacking means for stacking folded sheet bundles obtained by folding the sheet bundle;
Discharging means for discharging the stacking means at the leading fold of the folded sheet bundle;
Transfer means for transferring the folded sheet bundle discharged to the stacking means downstream or upstream in the sheet bundle discharge direction;
Have
When the folded sheet bundle is discharged to the stacking means, the already-folded folded sheet bundle that has already been discharged to the stacking means at a position on the stacking means determined according to the sheet information of the folded sheet bundle to be discharged. Is conveyed by the conveying means . The sheet processing apparatus according to claim 1, characterized in that it has a fold processing unit you the crease process by moving the member folded along fold line of the folded sheet bundle. When the fold processing means operates, the transfer means transfers the already stacked folded sheet bundle to a first stacking position that does not interfere with the folding member, and when the discharging means discharges the folded sheet bundle , 3. The sheet processing apparatus according to claim 2 , wherein the stacked folded sheet bundle is transferred to a second stacking position determined according to the sheet information, upstream of the first stacking position in the discharge direction.   4. The sheet processing apparatus according to claim 3, wherein an upstream end portion of the already loaded folded sheet bundle in the discharge direction at the first stacking position is positioned downstream of the operation region of the folding member in the discharge direction.   5. The sheet processing apparatus according to claim 3, wherein the transfer unit transfers the already-folded folded sheet bundle to the second stacking position after the operation of the folding member is completed.   4. The folded sheet bundle ejected by the ejecting means is stacked such that the fold overlaps with the upstream end portion in the ejection direction of the already loaded folded sheet bundle at the second stacking position. The sheet processing apparatus according to claim 5.   The sheet processing apparatus according to claim 6, wherein the stacking unit for stacking the folded sheet bundle has an inclined surface whose downstream side in the sheet discharge direction is vertically higher than the upstream side. The sheet information is a size in a discharge direction of the folded sheet bundle, and a transfer amount of the already loaded folded sheet bundle from the first stacking position to the second stacking position is determined by the sheet information. The sheet processing apparatus according to any one of claims 3 to 7. In an image forming apparatus having an image forming unit that forms an image on a sheet, and a sheet processing apparatus that folds and discharges the image-formed sheets.
An image forming apparatus comprising the sheet processing apparatus according to claim 1 as the sheet processing apparatus. The sheet information detected by the detecting means, or by the sheet information inputted from the input means, the image formation according to claim 9, wherein further comprising a sheet type discriminating means for discriminating the sheet type of the bundle of folded sheets apparatus.