Abstract: A sheet stacking apparatus includes: a sheet stacking part on which a sheet is stacked; a tilt detection sensor arranged on an upstream side in a conveying direction of the sheet of the sheet stacking part, and which detects a tail end in the conveying direction in the conveyed sheet; a pair of correction rollers arranged on a downstream side in the conveying direction of the tilt detection sensor and arranged immediately before an upstream side in the conveying direction of the sheet stacking part, and which corrects a tilt of the sheet; and a sheet holder that holds the sheet with the tilt corrected by the pair of correction rollers, and conveys and stacks the sheet on the sheet stacking part.

Abstract: An image reading apparatus includes: a reader; a first conveyance roller pair; a second conveyance roller pair; and a hardware processor that lowers a conveying force exerted from the second conveyance roller pair on a sheet when acceleration control for accelerating a conveying speed of the sheet whose image has been read by the reader is performed, compared with a case in which the acceleration control is not performed.

Abstract: A post processing apparatus includes: a reader that reads paper on which an image is formed by an image forming apparatus to acquire a read image; a post processor that performs post processing on the paper; and a hardware processor that detects a position of an edge of the paper and a position of the image from the read image acquired by the reader, and controls a post processing position in the post processor on the basis of the position of the edge of the paper and the position of the image detected.

Abstract: A sheet stacking apparatus includes: a sheet stacking part on which a sheet is stacked; a tilt detection sensor arranged on an upstream side in a conveying direction of the sheet of the sheet stacking part, and which detects a tail end in the conveying direction in the conveyed sheet; a pair of correction rollers arranged on a downstream side in the conveying direction of the tilt detection sensor and arranged immediately before an upstream side in the conveying direction of the sheet stacking part, and which corrects a tilt of the sheet; and a sheet holder that holds the sheet with the tilt corrected by the pair of correction rollers, and conveys and stacks the sheet on the sheet stacking part.

Abstract: An image reading apparatus includes: a reader; a first conveyance roller pair; a second conveyance roller pair; and a hardware processor that lowers a conveying force exerted from the second conveyance roller pair on a sheet when acceleration control for accelerating a conveying speed of the sheet whose image has been read by the reader is performed, compared with a case in which the acceleration control is not performed.

Abstract: A post processing apparatus includes: a reader that reads paper on which an image is formed by an image forming apparatus to acquire a read image; a post processor that performs post processing on the paper; and a hardware processor that detects a position of an edge of the paper and a position of the image from the read image acquired by the reader, and controls a post processing position in the post processor on the basis of the position of the edge of the paper and the position of the image detected.

Abstract: A sheet processing apparatus, including: a stacking section; a first alignment section which aligns both end portions in a sheet conveyance direction of the sheet stacked in the stacking section; a second alignment section which aligns both end portions in a width direction, that is orthogonal to the sheet conveyance direction, of the sheet aligned by the first alignment section; a sheet ejection section which ejects the sheet stacked in the stacking section outside the stacking section; and a control section which moves a pair of horizontal alignment plates away from the both end portions in the width direction of the sheet after operating a gripping section so as to grip the sheet in a state where the pair of horizontal alignment plates contacts the both end portions in the width direction of the sheet supported by a supporting section.

Abstract: A sheet processing apparatus, including: a stacking section; a first alignment section which aligns both end portions in a sheet conveyance direction of the sheet stacked in the stacking section; a second alignment section which aligns both end portions in a width direction, that is orthogonal to the sheet conveyance direction, of the sheet aligned by the first alignment section; a sheet ejection section which ejects the sheet stacked in the stacking section outside the stacking section; and a control section which moves a pair of horizontal alignment plates away from the both end portions in the width direction of the sheet after operating a gripping section so as to grip the sheet in a state where the pair of horizontal alignment plates contacts the both end portions in the width direction of the sheet supported by a supporting section.

Abstract: A paper discharge apparatus including, a paper loading portion for loading a paper which is discharged; a paper rear-end abutting portion which a rear end of paper in a paper conveying direction abuts; a pair of paper holding members for holding the paper at the paper holding position when the paper is discharged; a paper holding member moving device which is connected to at least one of the pair of the paper holding members and moves the pair of the paper holding members from a paper holding position to a paper loading position; when the pair of the paper holding members reach the paper loading position, the paper holding member moving device moves at least one of the pair of the paper holding members in the opposite direction of the paper conveying direction and makes the rear end of the holding paper abut the paper rear-end abutting portion.

Abstract: A sheet post-processing apparatus including, a sheet receiving section to receive sheets, a punching device to punch sheets; an accumulating section to accumulate sheets; a stitching device to stitch the sheets accumulated in the accumulating section; a sheet discharging section to which the sheets stitched by the stitching device are discharged; and a conveyance path to connect the sheet receiving section, the punching device, the accumulating section, and the sheet discharging section, wherein the conveyance path comprises an upper loop and a lower loop and has an S-shaped conveyance path to convey a sheet from the sheet receiving section to the accumulating section; and the punching device is arranged in the upper loop.

Abstract: A paper discharge apparatus including, a paper loading portion for loading a paper which is discharged; a paper rear-end abutting portion which a rear end of paper in a paper conveying direction abuts; a pair of paper holding members for holding the paper at the paper holding position when the paper is discharged; a paper holding member moving device which is connected to at least one of the pair of the paper holding members and moves the pair of the paper holding members from a paper holding position to a paper loading position; when the pair of the paper holding members reach the paper loading position, the paper holding member moving device moves at least one of the pair of the paper holding members in the opposite direction of the paper conveying direction and makes the rear end of the holding paper abut the paper rear-end abutting portion.

Abstract: A sheet folding apparatus including: a conveyance device having a first pair of rollers for nipping and conveying a paper sheet; a folding device disposed downstream of the conveyance device in a paper sheet conveyance direction, the folding device having a second pair of rollers for nipping and conveying the paper sheet, wherein the conveyance device conveys the paper sheet to the folding device by making the paper sheet bent toward the folding device, and the folding device conveys the bent paper sheet to fold the paper sheet; and a folding assist member for pushing the paper sheet so that the paper sheet moves toward the folding device, the folding assist member being pivotally arranged to be capable of rotating downstream of the conveyance device in the conveyance direction.

Abstract: Providing a sheet collecting device capable of being downsized and of operating stably wherein a sheet ejecting device that conveys and ejects a sheet in the direction for making the sheet fall along a slanted sheet collecting board is provided, and a leading edge stopper that holds sheets on the sheet collecting board is set so that a trailing edge of the sheet may be at a constant height independently of a sheet size.

Abstract: A sheet discharging apparatus including: a sheet discharging section that discharges sheets at a position lower than a height H0 of 381 mm from a floor surface; and a sheet stacking section, which stacks the sheets discharged from the sheet discharging section, including a sheet raising section which raises the sheets discharged from the sheet discharging section so that a position of a top part of each of the sheets is higher than the height H0.

Abstract: A sheet folding apparatus including: a conveyance device having a first pair of rollers for nipping and conveying a paper sheet; a folding device disposed downstream of the conveyance device in a paper sheet conveyance direction, the folding device having a second pair of rollers for nipping and conveying the paper sheet, wherein the conveyance device conveys the paper sheet to the folding device by making the paper sheet bent toward the folding device, and the folding device conveys the bent paper sheet to fold the paper sheet; and a folding assist member for pushing the paper sheet so that the paper sheet moves toward the folding device, the folding assist member being pivotally arranged to be capable of rotating downstream of the conveyance device in the conveyance direction.

Abstract: It is intended to provide a sheet stack ejecting apparatus, an image forming apparatus and a sheet stack processing apparatus applicable to ejection of a sheet stack while ejection errors are prevented by reducing disorderliness of ejected sheets of paper. A sheet ejecting apparatus 10 carries and ejects a sheet stack by holding the sheet stack with an ejecting roller pair 10 that consists of a top roller 21 and a bottom roller 22. The sheet ejecting apparatus 10 further includes a motor 24 for shifting the top roller 21 to switch between pressing state and separated state with respect to the ejecting roller pair 15 and a controller 20 for controlling the motor 24. The controller 20 works as ejection means that makes the ejecting roller pair 15 pressing state so as to eject a sheet stack and as separation means that makes the ejecting roller pair 15 separated state before a back end of a sheet stack escapes from nips of the ejecting roller pair 15 by using the motor 24.

Abstract: It is intended to provide a sheet stack ejecting apparatus, an image forming apparatus and a sheet stack processing apparatus applicable to ejection of a sheet stack while ejection errors are prevented by reducing disorderliness of ejected sheets of paper. A sheet ejecting apparatus 10 carries and ejects a sheet stack by holding the sheet stack with an ejecting roller pair 10 that consists of a top roller 21 and a bottom roller 22. The sheet ejecting apparatus 10 further includes a motor 24 for shifting the top roller 21 to switch between pressing state and separated state with respect to the ejecting roller pair 15 and a controller 20 for controlling the motor 24. The controller 20 works as ejection means that makes the ejecting roller pair 15 pressing state so as to eject a sheet stack and as separation means that makes the ejecting roller pair 15 separated state before a back end of a sheet stack escapes from nips of the ejecting roller pair 15 by using the motor 24.