A staple processing device includes a staple tray, a staple unit, a rear reference plate, a front reference plate, and an interlocking mechanism. The staple unit performs a staple process on a plurality of sheets loaded on the staple tray. The staple unit is movable along the ends of the sheets in a sheet width direction. The rear reference plate and the front reference plate abut the ends of the plurality of sheets and aligns the plurality of sheets. The interlocking mechanism moves the rear reference plate and the front reference plate in the sheet width direction in interlock with the movement of the staple unit.

Provided are a miswinding detection device and a miswinding detection method that make it possible to quickly and accurately detect miswinding. A miswinding detection device (1) has an outline detection unit (12) that detects the outline of a wire rope (3) in the rotation axis direction of a drum (2) in a captured image of the wire rope (3) as wound on the drum (2) and a determination unit (15) that calculates the degree of change in the detected outline in the radial direction of the drum (2) and determines miswinding of the wire rope (3) based on the magnitude of the calculated degree of change.

Disclosed are methods and systems for dispensing a printed document from a printer machine with a dispensing device. For instance, a document being printed out from the printer machine may be monitored for, and a determination that a document is being printed out from the printer machine may be made based on the monitoring. The printed document may be engaged with an arm mechanism of the dispensing device, the printed document may be urged towards a slot of the dispensing device with the arm mechanism, and the printed document may be dispensed out of the slot with the arm mechanism.

A paper jam indication detection device detects an indication that a paper jam will occur in a paper feed device. The paper jam indication detection device includes: a sound collector that collects a friction sound produced by friction between a plurality of sheets of paper when the paper is fed from a holder holding the plurality of sheets of the paper; an indication detector that detects an indication that a paper jam will occur in the paper feed device based on a decrease in the friction sound collected by the sound collector; and a signal outputter that, when the indication is detected by the indication detector, outputs, to the paper feed device, a signal for stopping the paper from being fed from the holder.

A paper jam indication detection device detects an indication that a paper jam will occur in a paper feed device. The paper jam indication detection device includes: a sound collector that collects a friction sound produced by friction between a plurality of sheets of paper when the paper is fed from a holder holding the plurality of sheets of the paper; an indication detector that detects an indication that a paper jam will occur in the paper feed device based on a decrease in the friction sound collected by the sound collector; and a signal outputter that, when the indication is detected by the indication detector, outputs, to the paper feed device, a signal for stopping the paper from being fed from the holder.

A sheet conveying device includes a conveyor, a sound collector, and circuitry. The conveyor conveys a sheet. The sound collector collects an operating sound when the sheet is conveyed. The circuitry is to extract a feature amount of the operating sound collected by the sound collector, select, among multiple sets of index data serving as index to determine whether an abnormal conveyance of the sheet is to be occurred, a set of index data corresponding to a conveyance condition of the sheet, and determine whether the abnormal conveyance of the sheet is to be occurred based on the feature amount and the set of index data selected from the multiple sets of index data.