JPS6084952U

JPS6084952U - Developer concentration control device

Info

Publication number: JPS6084952U
Application number: JP17769983U
Authority: JP
Inventors: 松之青木
Original assignee: 富士ゼロックス株式会社
Priority date: 1983-11-17
Filing date: 1983-11-17
Publication date: 1985-06-12

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は磁気ブラシ現像装置の内部構造を示す側面図、
第２図は現像剤の濃度制御装置の概略的構成を示す図、
第３図はトナー濃度センサの動作を示すタイムチャート
、第４図は従来装置によるトナー供給の際の時間おくれ
を説明するための図、第５図は本考案に用いられる２つ
の基準値の関係を示すグラフ、第６図は本考案の実施例
装置の動作例を示すフローチャート、第７図は従来装置
によるトナー供給制御と実施例装置によるトナー供給制
御とを対比して示した図である。１・・・感光体ドラム、２・・・磁気ブラシ現像装置、
３・・・トナーボックス、４・・・トナー、５・・・デ
ィスペンサロール、６・・・ハウジング、７・・・ブレ
ンタ、８・・・搬送ロール、９・・・マグネットロール
、１０・・・トリマープレート、１１・・・ミキサープ
レート、１２．２９・・・現像剤掻き落し板、２０・・
・トナー濃度検出センサ、２１・・・永久磁石、２２・
・・ロール、２３・・・積立規制板、２４・・・導電性
ガラス、２７・・・発光素子、２８・・・受光素子、′
３０・・・センサ出力測定回路、４０・・・演算部、５
０・・・ディスペンスモータ、６２・・・スイッチング
回路。FIG. 1 is a side view showing the internal structure of the magnetic brush developing device;
FIG. 2 is a diagram showing a schematic configuration of a developer concentration control device;
Figure 3 is a time chart showing the operation of the toner concentration sensor, Figure 4 is a diagram to explain the time lag when toner is supplied by a conventional device, and Figure 5 is the relationship between the two reference values used in the present invention. FIG. 6 is a flowchart showing an example of the operation of the apparatus according to the embodiment of the present invention, and FIG. 7 is a diagram comparing toner supply control by a conventional apparatus and toner supply control by the embodiment apparatus. 1... Photosensitive drum, 2... Magnetic brush developing device,
3... Toner box, 4... Toner, 5... Dispenser roll, 6... Housing, 7... Brenta, 8... Conveyance roll, 9... Magnet roll, 10... Trimmer plate, 11...Mixer plate, 12.29...Developer scraping plate, 20...
・Toner concentration detection sensor, 21...Permanent magnet, 22・
... Roll, 23 ... Accumulation regulating plate, 24 ... Conductive glass, 27 ... Light emitting element, 28 ... Light receiving element, '
30... Sensor output measurement circuit, 40... Arithmetic unit, 5
0...Dispense motor, 62...Switching circuit.

Claims

[Scope of utility model registration request]

In a developer concentration control device that controls on/off of a motor for supplying toner into a developing device based on the detection output of a developability detection sensor that detects the developability of the developer,
The toner concentration in the developer based on the detection output of the developability detection sensor is compared with a first set concentration and a second set concentration smaller than the first set concentration, and the toner concentration is determined to be the first set concentration.
A developer concentration control device comprising: a control section that turns on the motor when the toner concentration is less than a second set concentration, and turns off the motor when the toner concentration is equal to or higher than a second set concentration. .