Paper sheet conveying apparatus, image forming apparatus and image reading apparatus

Abstract

The present-invention has as its object to provide a sheet conveying apparatus which can improve the correction accuracy of a sheet and can prevent the skew feeding of the sheet, and for this purpose, it provides a sheet conveying apparatus for conveying a sheet by sheet conveying means disposed along a sheet conveying path, including: skew detecting means for detecting the skew of the sheet being conveyed with respect to a sheet conveying direction; skew correcting means rotatable in a direction to correct the skew of the sheet in a state nipping the sheet in its skew state, on the basis of a detection signal from the skew detecting means; position correcting means for moving the skew correcting means in a direction intersecting with a sheet conveying direction; and control means for controlling so as to move the skew correcting means in the direction intersecting with the sheet conveying direction by the position correcting means while conveying the sheet by the skew correcting means, in order to convey the sheet in a state coincident with the sheet conveying direction when the skew correcting means is rotated to correct the skew of the sheet, and conveys the sheet in the rotated state.

Description

technical field [0001] The present invention relates to a paper conveying device having an image forming unit for conveying a paper (sheet / sheet) to the image forming device, and more particularly to a configuration for correcting the inclination of paper such as recording paper and original documents. Background technique [0002] Conventionally, image forming apparatuses such as copiers, printers, facsimile machines, and scanners and image reading apparatuses have a paper conveying device that conveys paper such as recording paper and originals to the image forming unit and the image reading unit. The paper conveying device has a correction unit that corrects the skew of the paper and corrects the misalignment of the paper to correct the attitude and position of the paper before being conveyed to the image forming unit and the image reading unit. [0003] Here, as a correction method of such a correction unit, there is a method using a pair of alignment rollers. For exampl...

AI Technical Summary

Problems solved by technology

[0018] However, in the case of (1), a mechanism for releasing the clamp of the conveying roller pair is required, and the cost of the product increases significantly, and the vibration at the time of releasing the clamp adversely affects the subsequent process.

In addition, if it is held in a later process, the clamp must be released instantaneously, and it is very difficult to grasp the timing

[0019] In addition, in the case of (2), when the distance from the conveying roller part to the post-processing part is short, it is very difficult for the curved belly to absorb the oblique feed, and creases occur on the paper.

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