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Screw conveyor and developer conveying mechanism

A technology of transmission mechanism and transmission machine, which is applied in the direction of electrography, optics, instruments, etc., can solve the problems of transmission performance degradation, achieve the effects of preventing pollution, reducing energy consumption, and eliminating blocking phenomena

Inactive Publication Date: 2005-09-14
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the force to lift the powder (developer) placed on the wall of the developer accommodating unit, etc. is reduced (this is because the outer edge of the blade approaches or separates from the wall surface due to the centrifugal condition), so that the conveyance performance is lowered

Method used

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  • Screw conveyor and developer conveying mechanism
  • Screw conveyor and developer conveying mechanism
  • Screw conveyor and developer conveying mechanism

Examples

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Embodiment Construction

[0034] Hereinafter, an image forming apparatus including a developer accommodating device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0035] Description of the entire image forming apparatus

[0036] FIG. 1 is a view showing the entire structure of an image forming apparatus.

[0037]An image forming apparatus 1 of an embodiment of the present invention includes a printer part (image forming part) 2 and a paper feeding unit part 3 provided below the printer part 2 . The electrophotographic processing section having the photosensitive drum 4 at its center is placed substantially in the middle of the printer unit 2 . Specifically, a charging unit 5 , an optical scanning unit 6 , a developing unit 7 , a transfer unit 8 , and a cleaning unit 9 are placed around the photosensitive drum 4 .

[0038] The charging unit 5 serves to uniformly charge the surface of the photosensitive drum 4 . The optical scanning...

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PUM

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Abstract

An embodiment of a screw conveyor includes a rotating shaft and a conveying blade helically formed around and loosely coupled with the rotating shaft. One or both of two edges of the conveying blade is / are only fixed to the rotating shaft, and a gap is provided between the rotating shaft and the conveying blade. Thereby, the conveying blade can be vibrated in a center axis direction of the rotating shaft by rotation of the rotating shaft and conveyed waste developer.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Patent Application No. 2004-64582 filed in Japan on March 8, 2004, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a screw conveyor for conveying powder, and more particularly to a screw conveyor used in a mechanism for conveying / recovering a developer employed in an image forming apparatus. Background technique [0004] The existing screw conveyor for use in the developer conveying / recovering mechanism has a structure such that the entire conveying blade 102 is completely fixed to the rotary shaft 101 as shown in FIG. 6( a ). [0005] When such a screw conveyor is used to convey a developer, its conveying performance changes according to the fluidity of the developer. The developer itself generally has high fluidity. However, if exposed to environmental changes, specifically high-humidity conditions, ea...

Claims

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Application Information

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IPC IPC(8): G03G15/08G03G21/00G03G21/10
CPCG03G21/105G03G2215/0827
Inventor 松山和弘山内浩一增田佳昭木田裕士
Owner SHARP KK