Paper Feed Roller

Abstract

To provide a paper feed roller which effectively suppresses sound squeak. A paper feed roller provided with a land part (21) and plural axial grooves (22). The plural axial grooves (22) intermittently extend along an axial direction, and are provided at intervals on a circumferential direction. A space between adjacent axial grooves (22) in the circumferential direction is equal to or less than 2 mm, and a surface roughness Rz of a cylindrical surface (21) of the land part is equal to or more than 10 mum.

Description

technical field [0001] The invention relates to a paper feeding roller, in particular to a paper feeding roller of copiers, printers, facsimile machines and other equipment. Background technique [0002] The paper feeding section of equipment such as copiers, printers, and facsimile machines includes pickup rollers, feed rollers, retard rollers, and the like for feeding paper sheets one by one. [0003] For example, in figure 1 In the FRR paper feeding device shown, the paper 5 is conveyed from the paper cassette 6 to the separation part by the pick-up roller 1, and in the separation part, the paper 5 is prevented from being multi-feed by the retard roller 3, wherein the retard roller 3 includes The torque limiter 4 is provided so as to press against the feed roller 2 . That is, when a paper feed command is issued, the pickup roller 1 and the feed roller 2 start to rotate. At this time, the retard roller 3 that presses against the feed roller 2 also rotates together with ...

AI Technical Summary

Problems solved by technology

[0004] If paper dust or its own wear debris remains on the surface, the friction coefficient of t

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