JP2019049630A5

JP2019049630A5 -

Info

Publication number: JP2019049630A5
Application number: JP2017173403A
Authority: JP
Filing date: 2017-09-08
Publication date: 2020-10-15
Anticipated expiration: 2037-09-08

Description

上記目的は本発明に係る画像形成装置にて達成される。要約すれば、本発明は、トナー像を担持する回転可能な像担持体、前記像担持体に接触し前記像担持体からトナーを除去するクリーニング部材、及び前記像担持体にトナーを供給して前記像担持体にトナー像を形成する現像手段をそれぞれが備えた複数の画像形成部と、前記複数の画像形成部の前記像担持体を駆動する共通の駆動源と、前記複数の画像形成部の前記像担持体のそれぞれに対応して設けられ、前記複数の画像形成部の前記像担持体のそれぞれの回転速度を検知する複数の速度検知手段と、非画像形成期間に前記現像手段により前記像担持体にトナーを供給して前記像担持体と前記クリーニング部材との接触部にトナーを供給する供給動作を実行する制御手段と、を有し、前記制御手段は、前記複数の速度検知手段の検知結果に基づいて取得した前記複数の画像形成部の前記像担持体のそれぞれの回転速度変動に関する情報に応じて、前記複数の画像形成部のそれぞれに関する前記供給動作の設定を変更することを特徴とする画像形成装置である。 The above object is achieved by the image forming apparatus according to the present invention. In summary, the invention provides a toner rotatable image bearing member for bearing a toner image, before contact with the Kizo carrier said image bearing member cleaning member for removing toner, and the image bearing member A plurality of image forming portions each provided with a developing means for forming a toner image on the image carrier, a common driving source for driving the image carrier of the plurality of image forming portions, and the plurality of image forming portions. A plurality of speed detecting means for detecting the rotation speed of each of the image carriers of the plurality of image forming portions, which are provided corresponding to each of the image carriers of the portions, and the developing means during the non-image forming period. The control means includes a control means for supplying toner to the image carrier and executing a supply operation for supplying the toner to a contact portion between the image carrier and the cleaning member, and the control means detects the plurality of speeds. The setting of the supply operation for each of the plurality of image forming portions is changed according to the information regarding the variation in the rotation speed of each of the image carriers of the plurality of image forming portions acquired based on the detection result of the means. It is an image forming apparatus characterized by.

Claims

Rotatable image bearing member for bearing a toner image, the toner image from the previous contact with the Kizo carrier said image bearing member to the cleaning member, and the image carrier by supplying toner to said image bearing member to remove toner A plurality of image forming portions each having a developing means for forming the
A common drive source for driving the image carrier of the plurality of image forming portions,
A plurality of speed detecting means provided corresponding to each of the image carriers of the plurality of image forming portions and detecting the rotation speed of each of the image carriers of the plurality of image forming portions.
And to that control means executes the supply operation for supplying the toner to the contact portion between the cleaning member and the image bearing member by supplying toner to the image carrier by the developing unit in the non-image forming period,
Have,
The control means, each of the plurality of image forming portions, according to the information regarding the rotation speed fluctuation of each of the image carriers of the plurality of image forming portions acquired based on the detection results of the plurality of speed detecting means. An image forming apparatus, which comprises changing the setting of the supply operation with respect to.

The image forming apparatus according to claim 1 , wherein the plurality of speed detecting means are attached to each drive shaft of the image carrier of the plurality of image forming portions.

The control means according to claim 1 or 2 , wherein, as a setting of the supply operation, the presence / absence of execution of the supply operation, the amount of toner supplied in the supply operation, or the execution frequency of the supply operation is changed. The image forming apparatus described.

When the control means changes the presence or absence of execution of the supply operation, the index value that correlates with the magnitude of the rotational speed fluctuation of the image carrier acquired based on the detection result of the speed detection means is equal to or higher than a predetermined threshold value. In the case of, when the supply operation is executed and the amount of toner supplied in the supply operation is changed, the second value is larger than the first value than when the index value is the first value. When the supply amount in the case of the value is increased and the execution frequency of the supply operation is changed, the second value is larger than the first value than in the case where the index value is the first value. The image forming apparatus according to claim 3 , wherein the execution frequency is increased in the case of the value of.

The image forming apparatus according to claim 4 , wherein the control means obtains the index value by performing a fast Fourier transform process on the detection result of the speed detection means.

The control means provides information on fluctuations in the rotation speed of the image carrier during the preparation period for rotating the image carrier before the start of image formation or during the preparation period before stopping the image carrier after the start of image formation. the front Symbol speed detection means of the detection result and obtains based on the claim 1 to an image forming apparatus according to any one of 5.