Perforating device, image forming device, perforating method

Abstract

A punching device includes a punching unit, a driving unit, an edge detecting unit, a punching position setting unit, and a punching controlling unit. The punching unit punches three holes in a transported sheet along its transport direction. The driving unit moves the punching unit in an orthogonal direction. The edge detecting unit detects, in at least two locations separated from each other in the transport direction, an edge position of an edge of the sheet on one side in the orthogonal direction. The punching position setting unit sets a punching position corresponding to a hole to be punched by the punching unit in the orthogonal direction, on the basis of an amount of change in the orthogonal direction between the two edge positions. The punching controlling unit causes the punching unit to move to the punching position and punch a hole in the sheet.

Description

Technical field [0001] The present invention relates to a punching device that performs a punching process on a sheet, that is, a so-called punching, an image forming apparatus equipped with the punching device, and a punching method for forming a punch. Background technique [0002] A punching device is known that performs punching processing for forming holes (so-called punching) for each sheet discharged from the main body of an image forming apparatus such as a printer, a copying machine, a facsimile machine, and a multifunction machine equipped with these functions. This punching device is usually unitized as a post-processing device together with a device that performs binding processing, center folding processing, etc., and is used in connection with the main body of the image forming apparatus. [0003] As such a punching device, in the past, the position where the punching operation is performed is fixed. Therefore, if the sheet conveyed to the punching device is inclined...

AI Technical Summary

Problems solved by technology

Therefore, if the sheet conveyed to the punching device is inclined with respect to its conveying direction, the punching process cannot be performed at an appropriate position of the sheet

As a result, the positions of the holes formed on each sheet become irregular among the sheets, and the appearance when binding a plurality of sheets each formed with holes is deteriorated.

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