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Toner conveying device and image forming apparatus

一种运送装置、调色剂的技术，应用在图像形成装置领域，能够解决没有调色剂粘到、运送量达到均匀、调色剂难顺利运送等问题

Inactive Publication Date: 2010-08-04
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, in the former toner conveying device, while the inner diameter of the conveying pipe is gradually reduced toward the downstream side, the outer diameter of the conveying screw is also gradually reduced toward the downstream side. The downstream side compresses the toner to increase its charge amount, and prevents the toner from sticking to the inner wall surface of the conveying pipe and makes the conveying amount uniform as the problem to be solved.
[0006] In addition, in the latter toner conveying device, only the diameter of the conveying screw in the vicinity of the toner supply port in the housing of the developing device is set larger. No measures are taken for volume homogenization
Therefore, the toner may accumulate and stick to the bottom of the casing on the upstream side of the toner supply port, whereby there is a problem that the toner is difficult to be conveyed smoothly.

Method used

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  • Toner conveying device and image forming apparatus
  • Toner conveying device and image forming apparatus
  • Toner conveying device and image forming apparatus

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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is an explanatory diagram viewed from a cross section for explaining an internal structure of an embodiment of an image forming apparatus to which a cleaning device including a toner conveying device according to the present invention is applied. exist figure 1 In , the X direction is referred to as the left-right direction, and in particular, -X is referred to as the left direction, and +X is referred to as the right direction. In this embodiment, a printer 10 is employed as an image forming apparatus.

[0025] like figure 1 As shown, the printer 10 is constituted by installing the following parts in the printer main body 11 : a paper supply unit 12 storing bundles of paper P; an image forming section 13; a fixing section 14 for performing a fixing process on a toner image transferred onto a sheet P by the image forming section 13; Paper discharge section...

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Abstract

The present invention provides a toner conveying device and an image forming apparatus. The toner conveying device includes a pipe body (conveying pipe) having an inside diameter thereof that is modified in a pipe-axis direction and a screw member coaxially located in the pipe body for feeding the toner. The screw member includes a screw shaft that rotates about an axis and a spiral fin that is spirally formed around an outer circumferential surface of the screw shaft. The distance between an outer circumferential surface of the spiral fin and an inner circumferential surface of the pipe bodyis constant in the longitudinal direction of the pipe body.

Description

technical field [0001] The present invention relates to, for example, a toner conveying device for conveying toner in an image forming apparatus having an image carrier on which a toner image is formed on the surface, cleaning the surface of the image carrier and applying (using) a toner A cleaning device for a toner conveying device, and an image forming apparatus employing (using) the toner conveying device or the cleaning device. Background technique [0002] Conventionally, a toner conveying device for conveying toner is used in a developing device of an image forming apparatus. And, for example, there is known the above-mentioned toner conveying device having a cylindrical conveying pipe whose inner diameter size gradually decreases from the upstream side to the downstream side, and a conveying screw. A propeller is concentrically and rotatably mounted within the delivery tube. [0003] In addition, while the inner diameter of the conveying pipe gradually decreases to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G21/10
CPCG03G21/105G03G21/10G03G21/12
Inventor 井上睦
Owner KYOCERA DOCUMENT SOLUTIONS INC
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