SHEET POST-PROCESSING DEVICE, IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM INCLUDING THE SAME, SHEET CONVEYANCE DEVICE, AND IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM INCLUDING THE SAME

To enable efficient sheet conveyance while maintaining a sheet spacing between preceding and subsequent sheets in a sheet conveyance path.SOLUTION: When a sheet spacing between a preceding sheet and a subsequent sheet is reduced caused by applying a predetermined process on the preceding sheet, the conveyance is continued while ensuring a sufficient sheet spacing between the preceding sheet and the subsequent sheet by forming a loop on the leading edge of the subsequent sheet in a loop space for forming a loop on the sheet and eliminating loops formed on the subsequent sheet so as not to narrow the sheet spacing between the subsequent sheet and the sheet following the subsequent sheet.SELECTED DRAWING: Figure 1 【課題】シート搬送経路において、先行シートと後続シートのシート間隔を確保しつつ、効率良いシート搬送を可能にする。【解決手段】先行シートに所定の処理を施すために先行シートと後続シートとのシート間隔が縮まってしまう場合、シートにループを形成するためのループ空間にて後続シートの先端側にループを形成し先行シートとのシート間隔を十分に確保すると共に、後続シートと後続シートに続くシートとのシート間隔が縮まらないように後続シートに形成されたループを解消しながら搬送を継続する。【選択図】図１