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Sheet feeder and image forming apparatus

A technology of paper feeding and paper feeding rollers, which is applied in the direction of mechanical equipment, instruments, and electrical recording technology equipment using charge graphics, etc. It can solve the problem of poor stop accuracy and achieve the effect of preventing abrasion or scratching

Active Publication Date: 2011-03-30
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the paper feed roller to be stopped rotates irregularly, so the paper stop accuracy becomes poor.

Method used

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  • Sheet feeder and image forming apparatus
  • Sheet feeder and image forming apparatus
  • Sheet feeder and image forming apparatus

Examples

Experimental program
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Embodiment Construction

[0023] The present invention will be described below with reference to these drawings. FIG. 1 is a perspective view showing an image forming apparatus having a recording device equipped with a sheet feeder according to an aspect of the present invention. Fig. 2 is a sectional view showing the main part of the image forming apparatus. Fig. 3 is an enlarged perspective view showing the recording device.

[0024] The image forming apparatus 1 is a multifunction device (MFD) having a printer function, a copy function, a scanner function, and a facsimile function. The sheet feeder of the present invention is applied to this image forming apparatus 1 . As shown in FIG. 1 , an image forming apparatus 1 has an apparatus main body 2 made of synthetic resin. On the bottom of the apparatus main body 2, there is provided a paper feed cassette 3 which can be inserted into the apparatus main body 2 through an opening portion 2a on the front (right side in FIG. 1) of the apparatus main bo...

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PUM

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Abstract

A sheet feeder includes a feed roller that includes a feed roller shaft, the feed roller being capable of feeding a sheet, a frame that supports the feed roller shaft, a helical gear attached to the feed roller shaft, a motor that drives the feed roller shaft via the helical gear, a disc attached to the feed roller shaft, a sensor body that detects a rotation of the disc, and a pressing member that presses the feed roller shaft from a side of the feed roller shaft in a thrust direction toward another side of the feed roller shaft, in order to prevent the disc from contacting with the sensor body.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2006-148788 filed on May 29, 2006, the subject matter of which is incorporated herein by reference. technical field [0003] The present invention relates to a paper feeder for feeding paper to a printing position and the like, and an image forming apparatus incorporating the paper feeder. Background technique [0004] JP-A-H09-249328 discloses a structure in which a drive gear driven by a motor meshes with a gear mounted on a paper feed roller shaft, thereby enabling the rotation of the motor to be transmitted to the paper feed roller shaft through the gear. At this time, helical gears are employed as gears for smoothly transmitting rotational motion and preventing occurrence of noise. [0005] In this arrangement, in order to control the rotation of the feed roller, a disc is mounted on the feed roller, and a sensor body for detecting the rotated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H5/06G03G15/00B41J13/02B41J23/02
CPCB65H2601/26B65H2601/12B65H2553/51B41J13/103B65H2403/45B65H43/08B65H5/062Y10T74/19628
Inventor 竹内胜
Owner BROTHER KOGYO KK