Paper feeding device and image forming apparatus

Abstract

Provided is a paper feeding device provided with a configuration for suppressing increase of costs using a configuration of a main part as it is even when specifications differ for every image formation device. This feeding device provided with a feeding cassette for feeding a medium loaded on a loading plate 7 by a feeding means 10 is provided with a tray body part 2 in which the loading plate 7 is arranged and a guide unit part for conveying a medium attached to the tray body part 2. The guide unit part for conveying the medium is provided with a member 9 for raising the loading plate toward the feeding means 10 and an elevation driving member 24 connected with the member 9 to set an elevation form of the loading plate 7.

Description

technical field [0001] The present invention relates to a paper feeding device and an image forming apparatus, and more specifically, to a structure of a paper feeding cassette provided with a mounting plate on which recording media such as paper can be loaded. Background technique [0002] In an image forming apparatus such as a copying machine, a printer, a facsimile, or a printing machine, an image formed in an image forming processing section is transferred onto a recording medium such as recording paper, and a recorded output can be obtained. [0003] For example, take the case of a printer as an example, the photoreceptor is used as a latent image carrier, an electrostatic latent image is formed on the photoreceptor, the electrostatic latent image is developed by a developing device, and the visible image is processed, and output by a paper feeding device. A recording medium on which the above-mentioned visible image is transferred. Therefore, in the image forming app...

AI Technical Summary

Problems solved by technology

[0007] Most of the above-mentioned paper feeding cassettes are formed by resin into a box shape with an open top. However, due to factors such as the size and thickness of the media, there are very few of the same specifications for the loading plate or remaining amount detection mechanism installed inside, that is, the size of the loading plate, Pushing force etc. vary depending on factors such as media size or thickness

[0008] On the other hand, with respect to the residual amount detection mechanism, the probe etc. are directly actuated by the movement of the medium or the loading plate, and the structure of the above-mentioned probe parts varies with the structure of the paper feeding device, so sometimes the paper feeding cassette cannot be made universally. style

In particular, as shown in Patent Document 1, in the configuration in which the pressing mechanism for pressing the placing plate upward is arranged in the paper feeding cassette, since the pushing amount and pressure of the placing plate on the opposite side to the probe cannot be changed, Therefore, special parts are required

As a result, each image forming apparatus must prepare a dedicated sheet feeding cassette, leading to an increase in cost

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