JP2018091985A5

JP2018091985A5 -

Info

Publication number: JP2018091985A5
Application number: JP2016234836A
Authority: JP
Filing date: 2016-12-02
Publication date: 2020-01-16

Description

前記目的を達成するための本発明に係る画像形成装置の代表的な構成は、像担持体と、前記像担持体を帯電する帯電手段と、前記像担持体に正規極性の現像剤を供給する供給手段と、前記像担持体と当接して当接部を形成し、前記当接部において前記像担持体の表面をクリーニングするクリーニング手段と、前記帯電手段に帯電電圧を印加する帯電電圧印加部と、前記帯電電圧印加部を制御する制御部と、を有し、記録材に画像形成する画像形成モードと、前記供給手段により前記当接部に前記現像剤を供給する振動抑制モードと、を実行可能な画像形成装置において、前記制御部は、前記画像形成モード実行時に前記像担持体の表面に形成される前記正規極性の表面電位とは逆極性の前記表面電位になるように前記帯電電圧を印加して前記像担持体の表面を帯電した状態で前記クリーニング手段により前記像担持体の表面をクリーニングした後、前記振動抑制モードを実行するように制御することを特徴とする。 A typical configuration of the image forming apparatus according to the present invention for achieving the above object includes an image carrier, a charging unit for charging the image carrier, and a developer having a normal polarity supplied to the image carrier. A supply unit, a cleaning unit configured to contact the image carrier to form a contact unit, and to clean a surface of the image carrier at the contact unit; and a charging voltage application unit configured to apply a charging voltage to the charging unit. An image forming mode for forming an image on a recording material, and a vibration suppression mode for supplying the developer to the contact portion by the supply unit. In the executable image forming apparatus, the control unit controls the charging so that the surface potential has a polarity opposite to that of the normal polarity formed on the surface of the image carrier when the image forming mode is executed. Apply voltage After cleaning the surface of the image bearing member by said cleaning means in a state of charging the surface of the carrier, Gyosu braking prior to perform Kifu dynamic suppression mode, characterized in Rukoto.

供給ローラ２４は、現像ローラ２３の表面を摺擦する発泡層を有しており、現像ローラ２３に現像容器２１内のトナー２２を供給する役割を担っている。現像装置２０は、現像ローラ２３に供給したトナー２２を規制するトナー規制部材２５も備えている。トナー規制部材２５は、現像容器２１に支持された支持板金２５ｂによりＳＵＳ（ステンレス）製のブレードとなる薄い板材２５ａが支持されている。
The supply roller 24 has a foam layer that rubs the surface of the developing roller 23, and has a role of supplying the developing roller 23 with the toner 22 in the developing container 21. The developing device 20 also includes a toner regulating member 25 that regulates the toner 22 supplied to the developing roller 23. Toner regulating member 25 is a thin plate member 25a as a by Ri S US (stainless steel) blade supporting metal plate 25b which is supported by the developer container 21 is supported.

Claims

An image carrier;
Charging means for charging the image carrier,
Supply means for supplying a developer of normal polarity to the image carrier,
A cleaning unit configured to contact the image carrier to form a contact portion, and to clean a surface of the image carrier at the contact portion ;
A charging voltage applying unit that applies a charging voltage to the charging unit ,
A control unit that controls the charging voltage application unit ;
Has ,
An image forming apparatus capable of executing an image forming mode for forming an image on a recording material, and a vibration suppression mode for supplying the developer to the contact portion by the supply unit ,
The control unit applies the charging voltage so that the surface potential of the opposite polarity to the surface potential of the normal polarity formed on the surface of the image carrier during execution of the image forming mode is applied. after cleaning the surface of the image bearing member by said cleaning means the surface of the body in a state where charged, pre-braking to perform Kifu dynamic suppression mode Gyosu image forming apparatus according to claim Rukoto.

An image carrier;
Charging means for charging the image carrier ,
Supply means for supplying a developer of normal polarity to the image carrier ,
A cleaning unit configured to contact the image carrier to form a contact portion, and to clean a surface of the image carrier at the contact portion ;
A transfer member for transferring a developer image formed on the surface of the image carrier to a transfer-receiving member ,
A charging voltage applying unit that applies a charging voltage to the charging unit ,
A transfer voltage application unit that applies a transfer voltage to the transfer member ,
A control unit that controls the charging voltage application unit and the transfer voltage application unit ;
Has ,
An image forming apparatus capable of executing an image forming mode for forming an image on a recording material, and a vibration suppression mode for supplying the developer to the contact portion by the supply unit ,
The control unit applies the transfer voltage so that the surface potential of the opposite polarity to the surface potential of the normal polarity formed on the surface of the image carrier when the image forming mode is executed, and An image forming apparatus that controls to execute the vibration suppression mode after cleaning the surface of the image carrier by the cleaning unit while the surface of the image carrier is charged .

Humidity detection means for detecting the humidity at which the image forming apparatus is installed,
A discharge distance detecting means for detecting a distance to the surface of the image bearing member in a state in which the charging voltage is applied is moved,
Has,
The control unit includes:
The calculated and predetermined amount of discharge coefficient, a moving distance of the image bearing member which has been detected by the discharge distance detecting means, the discharge amount is multiplied by in accordance with the detected humidity by the humidity detection means, the discharge 3. The image forming apparatus according to claim 1, wherein the vibration suppression mode is executed in accordance with a movement distance of the image carrier when an amount reaches a preset threshold. 4.

It has a print number detecting means for detecting the number of prints,
The control unit includes:
The image forming apparatus according to claim 3 , wherein the discharge amount coefficient is changed according to the number of printed sheets detected by the printed sheet number detecting unit.

Said supply means, claim 1-4, characterized in that it is constituted by a developing unit that develops as by supplying developer image of the developer to the electrostatic latent image formed on said image bearing member 2. The image forming apparatus according to claim 1.

The control unit includes:
The image forming apparatus according to any one of claims 1 to 5 , wherein the vibration suppression mode is executed in a non-image forming mode in which the image forming mode is not executed .

The control unit includes:
The image forming apparatus according to claim 6, characterized in that performing the vibration suppression mode, during rotation after after having executed the image forming mode.

The image forming apparatus according to claim 1, wherein the developer includes a toner including an external additive.