JPH0320367U

JPH0320367U -

Info

Publication number: JPH0320367U
Application number: JP8184189U
Authority: JP
Priority date: 1989-07-11
Filing date: 1989-07-11
Publication date: 1991-02-27

Description

[Brief explanation of drawings]

第１図は本考案の複写装置の一実施例を示すク
リーニング装置の概要図、第２図は第１図とは異
なる作動状態を示すクリーニング装置の概要図、
第３図はＶＳＧ値とソレノイドＯＮ−ＯＦＦ時間
との関係を示す図、第４図はクリーニングブレー
ド作動用ソレノイドのタイムチヤート、第５図は
ソレノイド制御のフローチヤート、第６図は複写
装置の一例を示す感光体廻りの概要図、第７図は
第６図の複写装置の光学系の部分を示す概要図で
ある。１……感光体、８……トナー濃度センサ、９…
…クリーニング装置、１０……クリーニングブレ
ード、１３……露光ランプ、１５……基準濃度板
、２０……ソレノイド。 FIG. 1 is a schematic diagram of a cleaning device showing an embodiment of the copying apparatus of the present invention, and FIG. 2 is a schematic diagram of the cleaning device showing an operating state different from that in FIG. 1.
Fig. 3 is a diagram showing the relationship between VSG value and solenoid ON-OFF time, Fig. 4 is a time chart of the solenoid for operating the cleaning blade, Fig. 5 is a flow chart of solenoid control, and Fig. 6 is an example of a copying machine. FIG. 7 is a schematic diagram showing the optical system of the copying apparatus shown in FIG. 6. 1... Photoreceptor, 8... Toner density sensor, 9...
... Cleaning device, 10 ... Cleaning blade, 13 ... Exposure lamp, 15 ... Reference density plate, 20 ... Solenoid.

Claims

[Scope of utility model registration request]

A toner density sensor detects the density after a predetermined density pattern provided at a predetermined location of the optical system is projected onto a photoreceptor and is developed, and the density of the background portion of the photoreceptor, and the main control device detects the density based on the ratio. In a copying machine that is designed to control toner density,
A cleaning device having a cleaning blade that can come into contact with and separate from the surface of the photoconductor is provided, and the main control device is configured to control the cleaning device when the background density of the photoconductor detected by the toner concentration sensor is below a reference value. A copying machine characterized by having a function of sending a cleaning blade operation command to a copying machine.