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Stirring/conveying member, and developing device and image forming apparatus therewith

A technology for developing devices and components, applied in the fields of stirring and conveying components and developing devices, can solve the problems of scattered toner, insufficient toner charge, fog phenomenon, etc., and achieve the effect of suppressing retention and reducing density

Active Publication Date: 2018-05-22
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the two-component development method, if the charge amount of the toner is insufficient, image defects such as toner scattering and fogging may occur

Method used

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  • Stirring/conveying member, and developing device and image forming apparatus therewith
  • Stirring/conveying member, and developing device and image forming apparatus therewith
  • Stirring/conveying member, and developing device and image forming apparatus therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0080] Such as figure 1 The image forming apparatus 1 shown is equipped with figure 2 and image 3 In the developing devices 2a to 2d shown, the charging performance of the carrier was studied when the configurations of the first screw 43 in the first transport chamber 22c and the second screw 44 in the second transport chamber 22d were changed. In addition, the test was performed in the magenta image forming section including the photosensitive drum 11 a and the developing device 2 a.

[0081] As a test method, the diameter of the rotating shaft 43b, 44b of the first screw rod 43, the second screw rod 44 is 6mm, the diameter of the first screw blade 43a, 44a is 17mm (radial height R1 is 5.5mm), and the blade pitch is 30mm, the diameter of the second helical blade 43c, 44c is 10mm (radial height R2 is 2.0mm), and the blade pitch is 30mm, such as Figure 4 As shown, the radial heights R2 of the second helical blades 43c, 44c decrease as they approach the intersection point ...

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PUM

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Abstract

The invention provides a stirring / conveying member, and a developing device and an image forming apparatus therewith. The stirring / conveying member has a rotary shaft rotatably supported in a powder container, a first helical blade formed on the circumferential surface of the rotary shaft and conveying powder in the axial direction by the rotation of the rotary shaft, and a second helical blade formed on the circumferential surface of the rotary shaft to overlap the forming region of the first helical blade, spiraling in the opposite phase to the first helical blade, and having a smaller radial height than the first helical blade. The first helical blade crosses the second helical blade at least at one place in one turn about the rotary shaft. At least one of the radial heights of the first and second helical blades equals zero at the intersection of the first and second helical blades.

Description

technical field [0001] The present invention relates to a stirring and conveying member for conveying powder such as a developer while stirring, a developing device including the same, and an image forming apparatus equipped with the developing device. Background technique [0002] In an image forming apparatus, a latent image formed on an image carrier made of a photoreceptor or the like is developed by a developing device and visualized as a toner image. As one of such developing devices, a two-component developing system using a two-component developer is employed. Such a developing device accommodates a developer consisting of a carrier and toner in a developing container, is provided with a developing roller for supplying the developer to the image carrier, and is provided with an agitating and conveying member that agitates the developer inside the developing container. While conveying, it is supplied to the developing roller. [0003] In the two-component developing...

Claims

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Application Information

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IPC IPC(8): G03G15/08
CPCG03G15/0889G03G15/0891G03G15/0893G03G2215/083G03G2215/0833G03G15/0812G03G15/0887G03G2215/0802G03G2215/0816G03G2215/0819
Inventor 山口晃史
Owner KYOCERA DOCUMENT SOLUTIONS INC
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