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Developing apparatus and image forming apparatus using the same

A developing device and developer technology, applied to the electric recording process using charge patterns, equipment and instruments using charge pattern electric recording technology, etc., can solve the problems of toner scattering and poor charging of toner, and achieve Improvement of mixing performance and stirring performance, effect of preventing toner scattering and image fogging

Active Publication Date: 2015-09-02
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the toner and developer are not sufficiently mixed, and the toner becomes poorly charged, resulting in toner scattering or image fogging (かぶり)

Method used

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  • Developing apparatus and image forming apparatus using the same
  • Developing apparatus and image forming apparatus using the same
  • Developing apparatus and image forming apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example ＞

[0043] figure 1It is a schematic configuration diagram of the entire image forming apparatus 10 as an embodiment of the present invention viewed from the front.

[0044] refer to the figure 1 The image forming apparatus 10 of the first embodiment includes four photoreceptor drums 12a, 12b, 12c, and 12d, and the photoreceptor drums 12a to 12d are arranged in a row along the horizontal direction. On the respective right sides of the photoreceptor drums 12a to 12d, developing devices 14a, 14b, 14c, and 14d are provided. In addition, chargers 16 a , 16 b , 16 c , and 16 d are provided obliquely below each of the photoreceptor drums 12 a to 12 d on the left. Furthermore, cleaning units 18 a , 18 b , 18 c , and 18 d are provided on the respective left sides of the photoreceptor drums 12 a to 12 d.

[0045] Further, the image forming apparatus 10 includes an intermediate transfer belt 20 provided using a driving roller 22 and a driven roller 24 so as to be in contact with the uppe...

no. 2 example ＞

[0087] Since the image forming apparatus 10 of the second embodiment is the same as the first embodiment except that a part of the configuration of the developing device 14 is changed, redundant descriptions are omitted.

[0088] To briefly describe, in the second embodiment, after the new toner that has been preliminarily stirred into the developer and the developer that has stirred the waste toner that has passed through the developing step are brought into contact, the toner that has been stirred by the contact is brought into contact with each other. The mixed developer remains in the vicinity of the gap 142c. In this way, stirring of new toner can be promoted.

[0089] Specifically, as Figure 7 As shown, at a position slightly to the right from the position corresponding to the position where the slit 142c is provided, a part of the helical blade 150b of the first conveying member 150 is missing. In other words, in this portion, the pitch of the helical blades 150b bec...

no. 3 example ＞

[0093] Since the image forming apparatus 10 of the third embodiment is the same as the image forming apparatus 10 of the second embodiment except that a paddle is provided in the helical groove instead of a part of the helical blade 150b, repeated description is omitted.

[0094] like Figure 8 As shown, in the developing device 14 of the third embodiment, in the spiral groove slightly to the right from the position corresponding to the position where the slit 142c is provided, there is provided a spiral groove extending radially from the center of the spiral shaft 150a and parallel to the spiral shaft 150a. The ground-configured plate (first plate) 150c. In this way, similarly to the second embodiment, in the vicinity of the slit 142c, that is, the position of the first transport path 140a where the plate (paddle) 150c is placed is located on the upstream side in the direction indicated by the arrow A, so that the paddle can be moved by touching However, the mixed developer ...

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Abstract

An image forming apparatus includes a developing apparatus that develops a toner image on a photoreceptor drum. In the developing apparatus, a first transporting member that transports a developer stored in a developer vessel while churning and a second transporting member are provided in parallel with each other, and the developer that is transported by the first transporting member is supplied to a developing roller from the second transporting member. The first transporting member churns a new toner and carrier that are resupplied with the developer. In the second transporting member, the developer that a waste toner passing a developing process is churned and the developer that the new toner being resupplied is churned are face and collide with each other. Accordingly, the new toner gets into the developer.

Description

technical field [0001] The present invention relates to a developing device and an image forming device using the developing device, and more particularly, to a developing device for developing a toner image on a photoreceptor, and an image forming device using the developing device. Background technique [0002] As an example of the related art, Japanese Unexamined Patent Publication No. 2008-122547 [G03G 15 / 08] (Document 1) filed on May 29, 2008 is disclosed. In the developing device disclosed in this document 1, a first agitating member for supplying the developer to the magnet roller while being agitated and conveyed is provided, and in the first agitating member, the developer is conveyed toward the center from both ends thereof. toner, touch near the center where the toner replenishment port is set. This contact generates a pulsating flow of the developer. By this pulsating flow, the toner and developer supplied to the toner supply port are mixed. [0003] However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0865G03G2215/0819G03G15/0879G03G15/0893G03G2215/0132
Inventor 明渡秀一
Owner SHARP KK