JPS63135373U

JPS63135373U -

Info

Publication number: JPS63135373U
Application number: JP2735887U
Authority: JP
Priority date: 1987-02-27
Filing date: 1987-02-27
Publication date: 1988-09-06
Anticipated expiration: 2002-02-27
Also published as: JPH0546051Y2

Description

[Brief explanation of the drawing]

第１図本考案の実施例を示し、この実施例に係
る静電式ブラシクリーニング装置の断面図、第２
図は他の実施例に係る静電式ブラシクリーニング
装置の断面図、第３図はこの装置における導電性
ブラシローラの経時的トナー蓄積量と、従来の静
電式ブラシクリーニング装置における経時的トナ
ー蓄積量との関係を示す関係図を夫々示し、また
第４図は静電式ブラシクリーニング装置を適用す
る複写装置の説明図、第５図及び第６図は従来の
静電式ブラシクリーニング装置の断面図を示し、
また第７図は感光ベルト上に多層状態で残留する
トナーの断面図を夫々示す。［符号説明］１……感光ベルト、５……導電性
ブラシローラ、６ａ……第一トナー回収ローラ、
６ｂ……第二トナー回収ローラ、７ａ，７ｂ，７
ｃ……直流電源、２１ａ……第一導電性ブラシロ
ーラ、２１ｂ……第二導電性ブラシローラ、２２
ａ……第一トナー回収ローラ、２２ｂ……第二ト
ナー回収ローラ、２４ａ，２４ｂ，２４ｃ……直
流電源。 Fig. 1 shows an embodiment of the present invention, and is a sectional view of an electrostatic brush cleaning device according to this embodiment.
The figure is a sectional view of an electrostatic brush cleaning device according to another embodiment, and FIG. 3 shows the amount of toner accumulated over time on the conductive brush roller in this device, and the amount of toner accumulated over time in a conventional electrostatic brush cleaning device. FIG. 4 is an explanatory diagram of a copying machine to which an electrostatic brush cleaning device is applied, and FIGS. 5 and 6 are cross sections of a conventional electrostatic brush cleaning device. shows the diagram,
Further, FIG. 7 shows cross-sectional views of toner remaining in a multilayered state on the photosensitive belt. [Description of symbols] 1... Photosensitive belt, 5... Conductive brush roller, 6a... First toner collection roller,
6b...Second toner collection roller, 7a, 7b, 7
c...DC power supply, 21a...First conductive brush roller, 21b...Second conductive brush roller, 22
a...First toner collection roller, 22b...Second toner collection roller, 24a, 24b, 24c...DC power supply.

Claims

[Claims for Utility Model Registration] (1) One or two rotatably provided conductive brush rollers are arranged so that their brush tips rub against the surface of a rotating image carrier, and the conductive In an electrostatic brush cleaning device that removes toner remaining on the image carrier by applying a DC voltage to a conductive brush roller, at least one conductive brush roller has an outer circumferential surface made of a conductive material. A pair of toner collection rollers each having an insulating layer formed thereon are disposed, and an electric field is formed between each toner collection roller and a conductive brush roller having a different electric field direction. An electrostatic brush cleaning device characterized by being provided with a voltage applying means for applying a voltage. (2) The conductive brush roller on which the pair of toner collection rollers are arranged is a conductive brush roller to which a DC voltage of the following magnitude is applied to start corona discharge from the tip of the brush at the part where it rubs against the image carrier. An electrostatic brush cleaning device according to claim 1, characterized in that: (3) The conductive brush roller on which the pair of toner collection rollers are arranged is arranged upstream in the rotational direction of the image carrier, and generates corona discharge from the tip of the brush at the part where it rubs against the image carrier. The other conductive brush roller is arranged adjacent to the downstream side of the image carrier, and has a polarity opposite to that of the one conductive brush roller, and is configured to conduct corona. The electrostatic brush cleaning device according to claim 1, which is comprised of a conductive brush roller to which a DC voltage below the start of discharge is applied.