Sheet separating and conveying mechanism, sheet conveying device, and image forming device

Abstract

The present invention provides a sheet separating and conveying mechanism, a sheet conveying device and an image forming apparatus including the sheet separating and conveying mechanism. The sheet separating and conveying mechanism of the present invention includes a sheet feeding member, a separating member, a supporting member, a sheet member, and a recess, and separates and conveys loaded sheets at a nip between the sheet feeding member and the separating member. The supporting member has a separating member holding portion and a guide portion that guides the front end of the sheet downstream along the slope on the upstream side of the separating member holding portion. The sheet member is attached from the guide so as to partially overlap the separation member, and has a lower coefficient of friction than the separation member. The concave portion is a groove formed at the sticking position of the sheet member in the guide portion and deeper than the thickness of the sheet member. According to the present invention, there is an effect of preventing overlapping conveyance of sheets and failure of conveyance of thick paper with a simple structure.

Description

technical field [0001] The present invention relates to a sheet conveying device for conveying sheet-shaped paper and originals used in image forming devices such as digital copiers and laser printers, and more particularly to a sheet separation conveying device for separating and conveying sheets one by one from a loaded stack of sheets mechanism. Background technique [0002] Conventionally, in a paper feeding device installed in a copying machine using an electrophotographic process, the uppermost side of a loaded paper bundle is usually pressed against a paper feeding roller and conveyed. Furthermore, a sheet separating and conveying mechanism is used which separates and conveys only the uppermost sheet of the paper bundle using a separation pad pressed against the paper feed roller. [0003] For example, there is known a paper feeding device in which chute ribs are formed higher than the upper surface of the separation member in the paper guide chute located on both si...

AI Technical Summary

Problems solved by technology

If the peeling function is emphasized, the peeling function can be improved by increasing the transport load by increasing the friction of the separation pad, but especially for thick paper, the transport load will become too large, and the paper will not be transported to the feed roller and the separation pad. Defective condition of the nip part (main separation part)

[0006] On the other hand, in order to improve the transport performance of thick paper, for example, the angle of the separation pad is flattened, the separation pad with a low friction coefficient is selected, the spring load for pressing the separation pad is reduced, etc., and the setting of reducing the transport load of the peeling part is adopted. , this time the stripping performance will degrade

[0007] Especially in the case of a structure in which the same paper feed roller and separation pad are used to separately convey the paper feed from the paper feed cassette and the paper feed from the manual tray located above the paper feed cassette, since the paper is fed from the manual tray The entry angle to the separation pad becomes larger, so elastic paper such as thick paper is prone to stop in front of the main separation section.

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