JPH0222958U

JPH0222958U -

Info

Publication number: JPH0222958U
Application number: JP10111688U
Authority: JP
Priority date: 1988-08-01
Filing date: 1988-08-01
Publication date: 1990-02-15

Description

[Brief explanation of drawings]

第１図は定着装置と共に示す本考案の実施例の
概略構成を示す断面図、第２図は本考案の実施例
の排紙ローラ対の側断面図、第３図は第２図中の
―線による断面図、第４図はその従動ローラ
の突起の周辺を示す側面図、第５図及び第６図は
その実施例の作用を説明する説明図、第７図ａ，
ｂは従来の装置の１例を示す斜視図及び断面図で
ある。１……駆動ローラ、３……ゴム層、３ａ……突
起、３ｂ……スリツト、４……排紙ローラ（従動
ローラ）、５……加圧用板ばね。 FIG. 1 is a sectional view showing a schematic configuration of an embodiment of the present invention shown together with a fixing device, FIG. 2 is a side sectional view of a pair of paper ejection rollers in an embodiment of the present invention, and FIG. 4 is a side view showing the vicinity of the protrusion of the driven roller, FIGS. 5 and 6 are explanatory diagrams illustrating the operation of the embodiment, and FIGS. 7a,
b is a perspective view and a sectional view showing an example of a conventional device. DESCRIPTION OF SYMBOLS 1... Drive roller, 3... Rubber layer, 3a... Protrusion, 3b... Slit, 4... Paper discharge roller (driven roller), 5... Pressure plate spring.

Claims

[Claim for Utility Model Registration] Consisting of a drive roller and a driven roller that is in pressure contact with the lower part of the driven roller, the driven roller normally protrudes from its outer circumferential surface and is elastically pushed in from the outer circumferential surface by being pressed in the radial direction by an external force. During the paper being held and discharged by the pair of rollers, the protrusion is pushed in each time it comes into contact with the paper, and after the trailing edge of the paper has passed through the pressure contact part of the pair of rollers, the protrusion that protrudes causes the protrusion to press the rear edge of the paper. In the paper ejection roller of an image forming apparatus that pushes the end in the ejection direction to eject the paper to the ejection tray, the above-mentioned protrusions are a pair of protrusions extending parallel to the circumferential direction on the rubber layer provided on the outermost layer of the driven roller. The main body of the driven roller is integrally protruded from the outer surface of the bridge formed between the slits, and the main body of the driven roller is such that at least the area of the bridge of the rubber layer has a radius that is smaller than the other part by the height of the protrusion. A paper ejection roller characterized by having a diameter.