Abstract: A sheet storage device is equipped with sheet storage portions which are provided in an upper portion of a copying machine body and receive sheets, conveyed in sequence from the copying machine body, from downward and store the sheets in such a state that the sheets stand. The sheet storage portions are relatively rotatably supported in sequence and parallel. Each sheet storage portion receiving the sheet from the copying machine body is rotated to be held in the rotational position.

Abstract: A sheet storage apparatus having a sheet conveying portion and a sheet storage portion to receive the sheet as conveyed upward from below by the sheet conveying portion and to store the sheet in a vertical direction. The sheet storage portion includes a guide portion, first and second holding members. The first holding member forms a first nipping portion between the first holding member and the guide surface. The first holding member permits the sheet to be conveyed upward to pass through the first nipping portion, and holds the sheet by restricting the sheet from moving downward at the first nipping portion. The second holding member forms a second nipping portion between the second holding member and the guide surface. The second holding member permits the sheet to be conveyed upward to pass through the second nipping portion, and holds the sheet at the second nipping portion.

Abstract: A sheet stacking apparatus includes an endless belt member onto which sheets are stacked and which moves rotationally to convey the sheets; a plurality of holding members that is provided on the belt member and that holds the sheets down to a sheet stacking surface of the belt member to nip the sheets; and sheet detecting portions which detect presence or absence of sheets between the holding members and the sheet stacking surface of the belt member, the sheet detecting portions each include a light emitting portion that emits light and a light receiving portion that receives the light, and the light emitting portions and the light receiving portions are fixedly provided below the sheet stacking surface of the belt member so that the light emitting portions and the light receiving portions detect presence or absence of a sheet at times when facing the holding members.

Abstract: A sheet stacking apparatus includes an endless belt member onto which sheets are stacked and which moves rotationally to convey the sheets; a plurality of holding members that is provided on the belt member and that holds the sheets down to a sheet stacking surface of the belt member to nip the sheets; and sheet detecting portions which detect presence or absence of sheets between the holding members and the sheet stacking surface of the belt member, the sheet detecting portions each include a light emitting portion that emits light and a light receiving portion that receives the light, and the light emitting portions and the light receiving portions are fixedly provided below the sheet stacking surface of the belt member so that the light emitting portions and the light receiving portions detect presence or absence of a sheet at times when facing the holding members.

Abstract: This invention provides a sheet storage device, which can enhance sheet taking-out property in taking out of a sheet from a sorting device and sheet visibility. A sheet storage device 300 is equipped with sheet storage portions 330a to 330e which are provided in an upper portion of a copying machine body 130 and receive sheets P, conveyed in sequence from the copying machine body 130, from downward and store the sheets P in such a state that the sheets P stand. The sheet storage portions 330a to 330e are relatively rotatably supported in sequence and parallel. Each sheet storage portion receiving the sheet from the copying machine body 130 is rotated to be held in the rotational position. According to this constitution, the sheet taking-out property in taking out of the sheet from the sheet storage portions 330a to 330e and the sheet visibility are enhanced.

Abstract: A sheet storage apparatus having a sheet conveying portion and a sheet storage portion to receive the sheet as conveyed upward from below by the sheet conveying portion and to store the sheet in a vertical direction. The sheet storage portion includes a guide portion, first and second holding members. The first holding member forms a first nipping portion between the first holding member and the guide surface. The first holding member permits the sheet to be conveyed upward to pass through the first nipping portion, and holds the sheet by restricting the sheet from moving downward at the first nipping portion. The second holding member forms a second nipping portion between the second holding member and the guide surface. The second holding member permits the sheet to be conveyed upward to pass through the second nipping portion, and holds the sheet at the second nipping portion.

Abstract: This invention regards to a sheet storage apparatus. A forward and reversely rotatable conveying roller 301 which conveys a sheet to a tray 330 is disposed at a sheet conveying path R which guides the sheet conveyed from an image forming apparatus main body to the tray of the sheet storage apparatus 300. A retraction path 503 where the sheet is conveyed by reversely rotating the conveying roller is branched from the sheet conveying path upstream of the conveying roller. When plural sheets are stored in the tray, the sheets are conveyed to the retraction path by reversely rotating the conveying roller until a final sheet has been conveyed from the image forming apparatus main body, and when the final sheet has been conveyed, the sheets conveyed to the retraction path and the final sheet are conveyed in a state of being overlaid on one another to the tray.

Abstract: A sheet storage device and an image forming apparatus capable of increasing extractability and visibility are provided. A plurality of trays 330 (330a to 330e) receives sheets sequentially conveyed from an image forming apparatus main body 100A from a lower part thereof and stores the sheets in a standing condition. The plurality of trays 330 (330a to 330e) is configured such that a downstream end in a sheet conveying direction and a front end in a direction perpendicular to a sheet conveying direction of the stored sheets protrude from the trays 330 (330a to 330e).

Abstract: Provided is a sheet processing apparatus for processing sheets, including: a sheet process tray on which sheets to be processed are stacked; a sheet transport means for transporting processed sheets on the sheet process tray; a pressure member which is provided on an upstream side of the sheet transport means with respect to a sheet transport direction and which moves in the sheet transport direction while pressing the processed sheets, for transporting the processed sheets in cooperation with the sheet transport unit; and a controller for selectively operating the pressure member.

Abstract: In order to reduce the stack failure of a sheet bundle, there is provided a sheet stacking/aligning apparatus comprising: a stack tray for stacking sheets thereon; and a rear end aligning member for pushing and aligning the rear end of a sheet conveyed onto the stack tray. The rear end aligning member includes sheet holding paddle for holding the sheets stacked on the stack tray.

Abstract: A sheet skew-correcting device includes a sheet-conveying rotation body for conveying a sheet, a skew-correcting member that contacts an end of the sheet conveyed by the sheet-conveying rotation body for correcting skew of the sheet, and a driving unit for moving the skew-correcting member. The skew-correcting member moved in a sheet-conveying direction by the driving unit contacts the end of the sheet conveyed in the sheet-conveying direction by the sheet-conveying rotation body, so as to correct the skew of the sheet.

Abstract: To prevent deviation in a processing position of a sheet bundle caused by buckling of the sheet bundle and handle a number of diversified kinds of sheets without increasing the size of apparatuses, a sheet processing apparatus and a image forming apparatus includes a pair of saddle entrance rollers which discharges a sheet; a stack tray which stacks the sheet discharged by the roller pair; a gripping member which grips the rear end portion of the sheet in the discharging direction which is stacked by the tray; a gripper which grips the front end portion of the sheet in the discharging direction which is stacked by the tray; and a stapler, etc., which processes a sheet bundle at a processing position, wherein the gripping member and the gripper grip the sheet bundle stacked by the tray and move the sheet bundle to the processing position in cooperation with each other.

Abstract: A sheet stacking apparatus includes an alignment roller which conveys a sheet to a sheet positioning member and an opening and closing shutter which is disposed so as to face a sheet stack surface of a sheet stack guide. The sheet positioning member abuts a sheet end in a sheet conveying direction to align the sheet. The sheet is stacked on the sheet stack guide. The opening and closing shutter has a regulating area where sheet conveying guide and buckling of the sheet are regulated from an upstream side to a downstream side in the sheet conveying direction of the alignment roller. A guide interval formed between the opening and closing shutter and the sheet stack surface can be changed. Therefore, in sheet conveying positioning, the buckling can securely be prevented in the sheet stack guide.

Abstract: The present invention provides a sheet processing apparatus including: a conveying portion which conveys a sheet; a stacking portion which stacks the sheet conveyed by the conveying portion; a first processing unit which performs a process to the sheet at a first process position on the stacking portion; a second processing unit which performs a process to the sheet at a second process position on the stacking portion, the second process position being at the downstream side in the conveying direction of the first process position; and a controlling portion which performs positioning of the sheet at the first process position when the first processing unit performs the process to the sheet and positioning of the sheet at the second process position when the second processing unit performs the process to the sheet which is passed through the first process position without being positioned.

Abstract: A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.

Abstract: A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.

Abstract: A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.

Abstract: A sheet processing apparatus staples a bundle of sheets, folds the sheets into two to make a book, and presses the folded sheets. A stitch bookbinding unit moves a press unit having press rollers and, a press holder, and the like constituting a creasing unit along the fold of a bundle of sheets subjected to the folding process by the press rollers and so as to reliably nip-press the fold by the nip between the moving press rollers and for pressing it. The press holder performs intermittent movement in which it is stopped during movement.

Abstract: A sheet processing apparatus or an image forming apparatus has a discharging member which discharges sheets; a stacking member which stacks the discharged sheets; a sheet positioning member, located on the downstream side of the stacking member in the discharging direction, which receives ends of the discharged sheets in a discharging direction of the sheet discharged by the discharging member; and a pressure member having a pressure surface which presses the sheet received by the sheet positioning member toward a stacking surface of the stacking member; wherein at first a downstream side in the discharging direction of the pressing surface presses the discharged sheets toward the stacking surface of the stacking member, and subsequently an upstream side in the discharging direction of the pressing surface presses the discharged sheets toward the stacking surface sequentially.

Abstract: A sheet processing apparatus includes an aligning member and a shift conveying unit. The aligning member is movable in a width direction perpendicular to a sheet conveying direction and presses a sheet stack loaded on a sheet processing tray so as to align the sheet stack in the width direction. The unit is provided on the upstream side of the tray and conveys a sheet, shifting the sheet in the width direction. Being shifted by the unit, sheets are loaded at first and second loading positions on the tray. When sheets are loaded at the first loading position, the aligning member is moved to a first standby position corresponding to the first loading position in advance. When sheets are loaded at the second loading position, the aligning member is moved in advance to a second standby position corresponding to the second loading position.