JPH0176835U

JPH0176835U -

Info

Publication number: JPH0176835U
Application number: JP1987171562U
Authority: JP
Priority date: 1987-11-10
Filing date: 1987-11-10
Publication date: 1989-05-24

Description

[Brief explanation of the drawing]

第１図はこの考案による複写機の要部を示す概
略構成図、第２図は第１図の互いに圧接する従動
側の中間ローラ８と駆動側の中間ローラ７を拡大
して示す断面図、第３図は圧接解除手段２０の一
例を示す正面図、第４図は従来の複写機の中間ロ
ーラ付近を示す概略構成図、第５図はレジストロ
ーラが中間ローラを連回り駆動した場合に生じる
画像の縦倍率誤差を説明するための線図、第６図
は駆動側及び従動側の中間ローラをガイド板と共
に示す断面図、第７図は中間ローラ同志の接触圧
の分布の例を示す線図である。７，８……中間ローラ、１０，１１……レジス
トローラ、１３……感光体、１６……転写部、１
７，１８……軸、２０……圧接解除手段、２４…
…アーム、２５……ソレノイド、２７……コイル
スプリング、Ｐ……転写紙。 FIG. 1 is a schematic configuration diagram showing the main parts of a copying machine according to this invention, and FIG. 2 is an enlarged cross-sectional view showing the intermediate roller 8 on the driven side and the intermediate roller 7 on the driving side in pressure contact with each other in FIG. 1. FIG. 3 is a front view showing an example of the pressure release means 20, FIG. 4 is a schematic diagram showing the vicinity of the intermediate roller of a conventional copying machine, and FIG. A line diagram for explaining the vertical magnification error of an image, Fig. 6 is a cross-sectional view showing the driving side and driven side intermediate rollers together with a guide plate, and Fig. 7 is a line showing an example of the distribution of contact pressure between the intermediate rollers. It is a diagram. 7, 8... Intermediate roller, 10, 11... Registration roller, 13... Photoreceptor, 16... Transfer section, 1
7, 18... shaft, 20... pressure release means, 24...
...Arm, 25...Solenoid, 27...Coil spring, P...Transfer paper.

Claims

[Claims for Utility Model Registration] Transfer paper fed from a paper feeding section is fed to registration rollers via at least a pair of intermediate rollers that are urged in the direction of pressure contact with each other, and the transfer paper is placed on the photoreceptor. In a copying machine in which the transfer sheet is sent to a transfer section by driving registration rollers at precise timing in accordance with the image formed on the image, the pressure contact between the pair of intermediate rollers is released when the transfer paper is sent out to the transfer section by the registration rollers. A copying machine characterized by being provided with pressure release means for releasing pressure.