JPH01193877A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH01193877A JPH01193877A JP63019204A JP1920488A JPH01193877A JP H01193877 A JPH01193877 A JP H01193877A JP 63019204 A JP63019204 A JP 63019204A JP 1920488 A JP1920488 A JP 1920488A JP H01193877 A JPH01193877 A JP H01193877A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing
- developer
- rotation
- developing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003756 stirring Methods 0.000 claims description 34
- 238000013019 agitation Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Color Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は、複数台の現像器を有する画像形成装置におい
て、トナーを補給し２てこれを攪拌し所定のトナー濃度
の現像剤として現像スリーブへ供給する手段（以下これ
を現像剤供給手段と言う）の改良に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention provides an image forming apparatus having a plurality of developing units, in which toner is replenished and stirred to form a developer having a predetermined toner concentration on a developing sleeve. The present invention relates to an improvement in a means for supplying developer (hereinafter referred to as developer supply means).
（発明の背景）
従来の画像形成装置の現像剤供給手段においては、現像
器へのトナー補給が該現像器の現像動作時にだけ行われ
ている。すなわちトナー補給ユニットのトナー搬送スク
リューは該トナー補給ユニットに対応する現像器の現像
スリーブが回転中にのみ回転している。トナーを補給さ
れる現像器は、その現像剤攪拌軸が回転することによっ
て補給されたトナーを攪拌し、その結果、該現像器の現
像剤は均一に所定のトナー濃度にされる。この現像剤攪
拌軸の回転も従来の画像形成装置では現像スリーブの回
転中にのみ行われる。(Background of the Invention) In a developer supplying means of a conventional image forming apparatus, toner is replenished to a developing device only during a developing operation of the developing device. That is, the toner conveying screw of the toner replenishing unit rotates only while the developing sleeve of the developing device corresponding to the toner replenishing unit is rotating. The developing device that is supplied with toner stirs the supplied toner by rotating its developer stirring shaft, and as a result, the developer in the developing device is uniformly made to a predetermined toner concentration. In conventional image forming apparatuses, this rotation of the developer stirring shaft is performed only while the developing sleeve is rotating.
（発明が解決しようとする課題）
しかるに上述した従来の画像形成装置の現像剤供給手段
には次のような問題点がある。(Problems to be Solved by the Invention) However, the developer supply means of the conventional image forming apparatus described above has the following problems.
すなわち、画像形成装置の小型化を図って現像器を小さ
くしようとすると、画像形成のためのトナー消費量、換
言すれば現像器へ補給せねばならないトナーの量は変わ
らないのに現像器のトナー保有容量が少なくなるのでト
ナーの補給回数を増さねばならないが、該トナーの補給
は前述したとおり現像器の現像動作時間外には行えない
。In other words, if an attempt is made to downsize the image forming apparatus and make the developing device smaller, the amount of toner consumed for image formation, in other words, the amount of toner that must be replenished to the developing device remains the same, but the amount of toner in the developing device increases. Since the retained capacity decreases, the number of toner replenishments must be increased, but as described above, toner replenishment cannot be performed outside the developing operation time of the developing unit.
さらに、新しいトナーが補給される時に現像器内に残存
させておける既に攪拌済みの現像剤の量が少なくなるの
で、該攪拌済みの現像剤の補給トナーに対する割合の低
下に応じて現像剤の攪拌を長くしてやらないと現像剤の
トナー濃度の均一性が低下するが、該現像剤の攪拌も前
述したとおり現像動作時間より長く行うことはできない
。Furthermore, when new toner is replenished, the amount of already stirred developer that can remain in the developing device decreases, so the developer is stirred in proportion to the decrease in the ratio of the stirred developer to the replenishment toner. Unless the time is made longer, the uniformity of the toner concentration of the developer will deteriorate, but as mentioned above, the developer cannot be stirred for a longer time than the developing operation time.
したがって、従来の画像形成装置の現像剤供給手段では
、装置の小型化を図って現像器を小さくしようとすると
トナーの補給が消費に追いつけなくなったり、あるいは
現像剤のトナー濃度が均一性を低下させたりするために
画質の低下が起こり易くなるという問題が生じる。Therefore, with the developer supply means of conventional image forming apparatuses, when trying to downsize the apparatus and make the developing device smaller, toner replenishment cannot keep up with consumption, or the toner concentration of the developer becomes less uniform. Therefore, a problem arises in that image quality is likely to deteriorate.
本発明の目的は、トナー補給ユニットのトナー搬送スク
リューと現像器の現像剤攪拌軸とをいずれも現像スリー
ブの回転とは独立に回転制御することによってトナーの
補給回数も現像剤攪拌時間も現像器の現像動作とは別個
に設定でき、したがって現像器を小さくしても、トナー
の補給が消費に追いつけなくなることも現像剤のトナー
濃度の均一性が低下することもなく、その結果画質の低
下を生ずることのない現像剤供給手段を有する画像形成
装置を提供することである。An object of the present invention is to control the rotation of both the toner conveying screw of the toner replenishing unit and the developer stirring shaft of the developing device independently of the rotation of the developing sleeve. It can be set separately from the developing operation, so even if the developing device is made smaller, toner supply will not be unable to keep up with consumption, and the uniformity of the toner concentration of the developer will not deteriorate, resulting in a decrease in image quality. It is an object of the present invention to provide an image forming apparatus having a developer supplying means that does not cause the problem.
（課題を解決するための手段）
本発明の画像形成装置は上記の目的を達成するために次
の手段構成を有する。(Means for Solving the Problems) The image forming apparatus of the present invention has the following means configuration to achieve the above object.
すなわち本発明の画像形成装置は、複数台の現像器と：
該複数台の各現像器に対応する複数台のトナー補給ユ
ニットと； 該複数台の現像器の現像剤攪拌軸を回転さ
せる現像剤攪拌軸回転駆動手段と； 該複数台のうちの
いずれか１台の現像器の現像スリーブを回転させる現像
スリーブ回転駆動手段と； 前記複数台のトナー補給ユ
ニットのそれぞれに対応して設けられ、該トナー補給ユ
ニットの各トナー搬送スクリューをそれぞれ回転させる
トナー搬送スクリュー回転駆動手段と；現像剤攪拌軸回
転駆動手段へは、現像剤攪拌軸を短くとも第１色の現像
器の現像動作の開始時から最終色の現像器の現像動作の
終了時までの間回転させる現像剤攪拌軸回転駆動信号を
送出し、トナー搬送スクリュー回転駆動手段へは、トナ
ー搬送スクリューをトナー濃度に対応させて回転させる
トナー搬送スクリュー回転駆動信号を送出するとともに
、現像スリーブ回転駆動手段へは現像動作を行わせる現
像器の現像スリーブを回転させる現像スリーブ回転駆動
信号を送出する回転駆動制御手段と； を具備すること
を特徴とするものである。That is, the image forming apparatus of the present invention includes a plurality of developing devices and:
a plurality of toner replenishment units corresponding to each of the plurality of developing devices; a developer stirring shaft rotation drive means for rotating a developer stirring shaft of the plurality of developing devices; any one of the plurality of developing devices; a developing sleeve rotation driving means for rotating a developing sleeve of a developing device; a toner conveying screw rotating means provided corresponding to each of the plurality of toner replenishing units and rotating each toner conveying screw of the toner replenishing unit; a driving means; the developer stirring shaft rotation driving means rotates the developer stirring shaft at least for a period from the start of the developing operation of the first color developing device to the end of the developing operation of the final color developing device; A developer stirring shaft rotation drive signal is sent, a toner conveyance screw rotation drive signal is sent to the toner conveyance screw rotation drive means to rotate the toner conveyance screw in accordance with the toner concentration, and a toner conveyance screw rotation drive signal is sent to the development sleeve rotation drive means. The present invention is characterized by comprising: a rotational drive control means for transmitting a developing sleeve rotational drive signal for rotating a developing sleeve of a developing device that performs a developing operation;
（作 用）
以下に上記の手段構成を有する本発明の画像形成装置の
作用について説明する。(Function) The function of the image forming apparatus of the present invention having the above means configuration will be explained below.
回転駆動制御手段は、トナー搬送スクリューを現像器内
の現像剤のトナー濃度に対応させて回転させるトナー搬
送スクリュー回転駆動信号、をトナー搬送スクリュー回
転駆動手段へ送出する。The rotation drive control means sends to the toner conveyance screw rotation drive means a toner conveyance screw rotation drive signal for rotating the toner conveyance screw in accordance with the toner concentration of the developer in the developing device.
該トナー搬送スクリュー回転駆動手段は複数台の各現像
器に対応する複数台のトナー補給ユニットのそれぞれに
対応して設けられており、前記のトナー搬送スクリュー
回転駆動信号を受けて該複数台のトナー補給ユニットの
各トナー搬送スクリューを現像スリーブの回転とは別個
に回転させる。The toner conveyance screw rotation driving means is provided corresponding to each of a plurality of toner replenishment units corresponding to each of the plurality of developing devices, and receives the toner conveyance screw rotation drive signal and rotates the toner of the plurality of toner supply units. Each toner conveying screw of the replenishment unit is rotated separately from the rotation of the developing sleeve.
該複数個のトナー搬送スクリューは現像剤のトナー濃度
にだけ対応して回転するので、これらが互いに同時に回
転する場合もあれば別々に回転する場合もある。前記の
回転駆動制御手段は、現像剤攪拌軸を複写器の動作中常
時あるいは短くとも第１色の現像器の現像動作開始時か
ら最終色の現像器の現像動作終了時までの間回転させる
現像剤攪拌軸回転駆動信号を現像剤攪拌軸回転駆動手段
へ送出する。該現像剤攪拌軸回転駆動手段は、前記の現
像剤攪拌軸回転駆動信号を受けて複数台の現像器の現像
剤攪拌軸を現像スリーブの回転とは別個に回転させる。Since the plurality of toner conveying screws rotate only in accordance with the toner concentration of the developer, they may rotate simultaneously or separately. The rotational drive control means rotates the developer stirring shaft constantly during the operation of the copying machine, or at least from the start of the developing operation of the first color developing device to the end of the developing operation of the final color developing device. A developer stirring shaft rotation drive signal is sent to the developer stirring shaft rotation drive means. The developer stirring shaft rotation drive means receives the developer stirring shaft rotation drive signal and rotates the developer stirring shafts of the plurality of developing devices separately from the rotation of the developing sleeve.
また前記の回転駆動制御手段は、現像動作を行わせる現
像器の現像スリーブを回転させる現像スリーブ回転駆動
信号を現像スリーブ回転駆動手段へ送出する。該現像ス
リーブ回転駆動手段は、前記の現像スリーブ回転駆動信
号を受けて複数台の現像器のうちの現像動作を行う１台
の現像器の現像スリーブを回転させる。Further, the rotational drive control means sends a developing sleeve rotational driving signal to the developing sleeve rotational driving means to rotate the developing sleeve of the developing device that performs the developing operation. The developing sleeve rotation driving means receives the aforementioned developing sleeve rotation driving signal and rotates the developing sleeve of one of the plurality of developing devices that performs a developing operation.
以上、説明したように、本発明の画像形成装置は、トナ
ー補給ユニットのトナー搬送スクリューと現像器の現像
剤攪拌軸とをいずれも現像スリーブの回転とは独立に回
転制御できるので、トナーの補給を所望の回数行うこと
と現像剤の攪拌を所望の時間行うこととがともに現像器
の現像動作とは個別にでき、したがって現像器を小さく
しても、トナーの補給が消費に追いつけなくなることも
現像剤のトナー濃度の均一性が低下することも起こらな
いなめに高画質の画像を形成することができる。As described above, the image forming apparatus of the present invention can control the rotation of both the toner conveying screw of the toner replenishing unit and the developer stirring shaft of the developing device independently of the rotation of the developing sleeve. Both the desired number of times and stirring of the developer for a desired time can be done independently from the developing operation of the developing device. Therefore, even if the developing device is made smaller, toner replenishment may not be able to keep up with consumption. High quality images can be formed without reducing the uniformity of the toner concentration of the developer.
（実 施 例）
以下に、本発明の画像形成装置の実施例を図面に基づい
て説明する。(Example) Below, an example of the image forming apparatus of the present invention will be described based on the drawings.
第１図は本発明の画像形成装置の実施例の構成を示す図
である。同図において、イエロートナー（以下Ｙトナー
と略記する）を収納するＹトナー現像器１０１とシアン
トナー（以下Ｃトナーと略記する）を収納するＣトナー
現像器１０２とマゼンタトナー（以下Ｍトナーと略記す
る）を収納するＭトナー現像器１０３と黒トナーを収納
する黒トナー現像器１０４とには、現像剤攪拌軸４６、
同４７、同４８および同４９がそれぞれ設けられており
、また各現像器内の現像剤のトナー濃度を検出するし検
センサ８１、同８２、同８３および同８４がそれぞれ設
けられている。前記４本の現像剤攪拌軸は、モ゛−夕４
１に結合される軸４３を介して一斉に回転させられる。FIG. 1 is a diagram showing the configuration of an embodiment of an image forming apparatus according to the present invention. In the figure, a Y toner developer 101 that stores yellow toner (hereinafter abbreviated as Y toner), a C toner developer 102 that stores cyan toner (hereinafter abbreviated as C toner), and a magenta toner (hereinafter abbreviated as M toner). The M toner developing device 103 that stores the black toner and the black toner developing device 104 that stores the black toner include a developer stirring shaft 46,
47, 48, and 49 are provided, respectively, and detection sensors 81, 82, 83, and 84 are provided, respectively, to detect the toner concentration of the developer in each developing device. The four developer stirring shafts are motor 4.
1 and rotated in unison via a shaft 43 connected to
該回転は、制御部１がモータドライバ４０へ現像剤攪拌
軸回転駆動信号を送出することによって行われ、前記４
本の現像剤攪拌軸は短くとも前記４台の現像器のうちの
第１色の現像器が現像動作を開始してから最終色の現像
器が現像動作を終了するまでの間回転させられて現像剤
を攪拌する。The rotation is performed by the control unit 1 sending a developer stirring shaft rotation drive signal to the motor driver 40, and
The developer stirring shaft of the book is rotated at least from the time when the first color developer among the four developer units starts the developing operation until the final color developer completes the developing operation. Stir the developer.
Ｙトナー現像器１０１、Ｃトナー現像器１０２、Ｍトナ
ー現像器１０３および黒トナー現像器１０４のそれぞれ
に対応してＹトナー補給ユニット３１、Ｃトナー補給ユ
ニット３２、Ｍトナー補給ユニット３３および黒トナー
補給ユニット３４が設けられており、該４台のトナー補
給ユニットに対応してそれぞれのトナー搬送スクリュー
に結合するトナー搬送スクリュー回転軸２６、同２７、
同２８および同２９と、該４本のトナー搬送スクリュー
回転軸とそれぞれ回転させるモータ２１、同２２、同２
３および同２４とが設けられている。A Y toner replenishment unit 31, a C toner replenishment unit 32, an M toner replenishment unit 33, and a black toner replenishment unit correspond to the Y toner developer 101, C toner developer 102, M toner developer 103, and black toner developer 104, respectively. A unit 34 is provided, and toner conveying screw rotation shafts 26, 27, which are connected to the respective toner conveying screws in correspondence with the four toner supply units,
28 and 29, and motors 21, 22, and 2 that rotate the four toner conveying screw rotation shafts, respectively.
3 and 24 are provided.
制御部ｌは、Ｌ検センサ８１、同８２、同８３および同
８４のそれぞれが示す各現像器の現像剤のトナー濃度に
応じてモータドライバ１１、同１２、同１３および同１
４のそれぞれへトナ−１殻送スクリユー回転駆動信号を
送出する。その結果、該トナー搬送スクリュー回転駆動
信号を受けたモータドライバ１１、同１２、同１３およ
び同１４のそれぞれがモータ２１、同２２、同２３およ
び同２４を回転させてＹトナー、Ｃトナー、Ｍトナーお
よび黒トナーのそれぞれをＹトナー現像器１０１、Ｃト
ナー現像器１０２、Ｍトナー現像器１０３および黒トナ
ー現像器１０４のそれぞれへ補給する。該４台の現像器
へ補給されたトナーは前述したように４本の各攪拌軸の
回転によって攪拌され、該４台の現像器の各現像剤が均
一に所定のトナー濃度にされる。一方、Ｙトナー現像器
１０１、Ｃトナー現像器１０２、Ｍトナー現像器１０３
および黒トナー現像器１０４は、現像スリーブ７１、同
７２、同７３および同７４をそれぞれ有しており、該現
像スリーブ７１はクラッチ５６が結合状態にされて軸５
３の回転が現像スリーブ回転軸６１に伝えられることに
よって回転し、同様に、現像スリーブ７２はクラッチ５
７が結合状態にされて現像スリーブ回転軸６２が回転す
ることによって回転し、現像スリーブ７３はクラッチ５
８が結合状態にされて現像スリーブ回転軸６３が回転す
ることによって回転し、現像スリーブ７４はクラッチ５
９が結合状態にされて現像スリーブ回転軸６４が回転す
ることによって回転する。The control unit 1 controls the motor drivers 11, 12, 13, and 1 according to the toner concentration of the developer in each developing device indicated by the L detection sensors 81, 82, 83, and 84, respectively.
A toner one-shell feeding screw rotation drive signal is sent to each of the four toner cartridges. As a result, the motor drivers 11, 12, 13, and 14, which have received the toner conveying screw rotation drive signal, rotate the motors 21, 22, 23, and 24 to transfer the Y toner, C toner, and M toner. Each of the toner and black toner is supplied to each of the Y toner developer 101, C toner developer 102, M toner developer 103, and black toner developer 104. As described above, the toner supplied to the four developing devices is agitated by the rotation of each of the four stirring shafts, and the developer in each of the four developing devices is uniformly made to a predetermined toner concentration. On the other hand, a Y toner developer 101, a C toner developer 102, an M toner developer 103
The black toner developing device 104 has developing sleeves 71, 72, 73, and 74, respectively, and the developing sleeve 71 is connected to the shaft 5 when the clutch 56 is engaged.
3 is transmitted to the developing sleeve rotation shaft 61, and similarly, the developing sleeve 72 is rotated by the clutch 5.
7 are connected and the developing sleeve rotating shaft 62 rotates, so that the developing sleeve 73 is connected to the clutch 5.
8 are connected and the developing sleeve rotating shaft 63 rotates, and the developing sleeve 74 is rotated by the clutch 5.
9 are brought into a connected state, and the developing sleeve rotation shaft 64 rotates, thereby rotating.
制御部１が出力する現像スリーブ回転駆動信号はクラッ
チ動作信号５５と現像スリーブ回転信号６０とからなり
、クラッチ動作信号５５によってクラッチ５６、同５７
、同５８および同５９のうちの現像動作を行う現像器の
クラッチが１個だけ結合状態にされる。また現像スリー
ブ回転信号６０は、該現像動作を行う現像器の現像スリ
ーブを、現像条件に応じて定められる回転数で回転させ
ることをモータドライバ５０へ指令する。この結果、モ
ータ５１は軸５３を回転させ、該軸５３、前記のクラッ
チ動作信号５５により結合状態にされているクラッチお
よび該クラッチに結合されている現像スリーブ回転軸を
介して、現像動作を行う現像器の現像スリーブだけを前
記の所定の回転数で回転させる。The developing sleeve rotation drive signal outputted by the control section 1 consists of a clutch operation signal 55 and a developing sleeve rotation signal 60, and the clutch operation signal 55 causes the clutches 56 and 57 to
, 58 and 59, only one clutch of the developing device that performs the developing operation is engaged. Further, the developing sleeve rotation signal 60 instructs the motor driver 50 to rotate the developing sleeve of the developing device that performs the developing operation at a rotation speed determined according to the developing conditions. As a result, the motor 51 rotates the shaft 53 and performs a developing operation via the shaft 53, the clutch engaged by the clutch operation signal 55, and the developing sleeve rotation shaft coupled to the clutch. Only the developing sleeve of the developing device is rotated at the predetermined rotation speed.
以上のように、各トナー補給ユニットのトナー搬送スク
リューと各現像器の現像剤攪拌軸および現像スリーブと
はそれぞれ別個に回転制御されるので、各トナー補給ユ
ニットは各現像器の現像剤のトナー濃度に対応してトナ
ー補給を行うことができ、現像剤攪拌軸はＬ検センサの
トナー濃度検出に適した回転数で、しかも所要の期間継
続して回転することができ、現像スリーブは各現像器の
現像条件に対応したそれぞれの回転数で回転することが
できる。As described above, since the toner conveying screw of each toner replenishment unit and the developer stirring shaft and development sleeve of each developing device are each controlled to rotate independently, each toner replenishing unit can control the toner concentration of the developer of each developing device. The developer stirring shaft can rotate continuously for the required period at a rotation speed suitable for toner concentration detection by the L detection sensor, and the developer sleeve can be rotated continuously for the required period of time. It can be rotated at various rotational speeds corresponding to the development conditions.
（発明の効果）
以上、説明したように、本発明の画像形成装置は、トナ
ー補給ユニットのトナー搬送スクリューと現像器の現像
剤攪拌軸とをいずれも現像スリーブの回転とは独立に回
転制御できるので、トナーの補給を所望の回数行うこと
と現像剤の攪拌を所望の時間行うこととがともに現像器
の現像動作とは個別にでき、したがって現像器を小さく
しても、トナーの補給が消費に追いつけなくなることも
現像剤のトナー濃度の均一性が低下することも起こらな
いために高画質の画像を形成することができるという利
点を有する。(Effects of the Invention) As described above, the image forming apparatus of the present invention can control the rotation of both the toner conveying screw of the toner replenishing unit and the developer stirring shaft of the developing device independently of the rotation of the developing sleeve. Therefore, replenishing toner a desired number of times and stirring the developer for a desired time can be done separately from the developing operation of the developing device. Therefore, even if the developing device is small, toner replenishment is not consumed. This has the advantage that it is possible to form high-quality images because it does not cause the developer to be unable to keep up with the developer and the uniformity of the toner concentration of the developer does not decrease.
第１図は本発明の画像形成装置の実施例の構成を示す図
である。
１・・・・・・制御部、 １１，１２，１３．１４・・
・・・・モータドライバ、 ２１，２２，２３．２４
・・・・・・モータ、 ２６．２７，２８．２９・・・
・・・トナー搬送スクリュー回転軸、 ３１・・・・・
・Ｙトナー補給ユニット、 ３２・・・・・・Ｃトナー
補給ユニット、３３・・・・・・Ｍトナー補給ユニット
、 ３４・・・・・・黒トナー補給ユニット、 ４０・
・・・・・モータドライバ、４１・・・・・・モータ、
４３・・・・・・軸、 ４６，４７゜４８．４９・・
・・・・現像剤攪拌軸、 ５０・・・・・・モータドラ
イバ、 ５１・・・・・・モータ、 ５３・・・・
・・軸、５５・・・・・・クラッチ動作信号、 ５６．
５７，５８゜５９・・・・・・クラッチ、 ６０・・・
・・・現像スリーブ回転信号、 ６１，６２，６３．６
４・・・・・現像スリーブ回転軸、 ７１，７２，７３
．７４・・・・−・現像スリーブ、 ８１．８２，８３
．８４・・・・・・し検センサ、 １０１・・・・・・
Ｙトナー現像器、 １０２・・・・・・Ｃトナー現像器
、 １０３・・・・・・Ｍトナー現像器、１０４・・・
・・・黒トナー現像器。
代理人 弁理士 八 幡 義 博FIG. 1 is a diagram showing the configuration of an embodiment of an image forming apparatus according to the present invention. 1...Control unit, 11, 12, 13.14...
...Motor driver, 21, 22, 23.24
...Motor, 26.27, 28.29...
...Toner conveyance screw rotation shaft, 31...
・Y toner supply unit, 32...C toner supply unit, 33...M toner supply unit, 34...Black toner supply unit, 40.
...Motor driver, 41...Motor,
43...Axis, 46,47°48.49...
...Developer stirring shaft, 50...Motor driver, 51...Motor, 53...
...shaft, 55...clutch operation signal, 56.
57,58゜59...Clutch, 60...
...Developing sleeve rotation signal, 61, 62, 63.6
4...Developing sleeve rotation shaft, 71, 72, 73
．． 74...Developing sleeve, 81.82,83
．． 84...... detection sensor, 101...
Y toner developer, 102...C toner developer, 103...M toner developer, 104...
...Black toner developer. Agent Patent Attorney Yoshihiro Hachiman
Claims (1)
台のトナー補給ユニットと；該複数台の現像器の現像剤
攪拌軸を回転させる現像剤攪拌軸回転駆動手段と；該複
数台のうちのいずれか１台の現像器の現像スリーブを回
転させる現像スリーブ回転駆動手段と；前記複数台のト
ナー補給ユニットのそれぞれに対応して設けられ、該ト
ナー補給ユニットの各トナー搬送スクリューをそれぞれ
回転させるトナー搬送スクリュー回転駆動手段と；現像
剤攪拌軸回転駆動手段へは、現像剤攪拌軸を短くとも第
１色の現像器の現像動作の開始時から最終色の現像器の
現像動作の終了時までの間回転させる現像剤攪拌軸回転
駆動信号を送出し、トナー搬送スクリュー回転駆動手段
へは、トナー搬送スクリューをトナー濃度に対応させて
回転させるトナー搬送スクリュー回転駆動信号を送出す
るとともに、現像スリーブ回転駆動手段へは現像動作を
行わせる現像器の現像スリーブを回転させる現像スリー
ブ回転駆動信号を送出する回転駆動制御手段と；を具備
することを特徴とする画像形成装置。a plurality of developing devices; a plurality of toner replenishment units corresponding to each of the plurality of developing devices; a developer stirring shaft rotation drive means for rotating a developer stirring shaft of the plurality of developing devices; a developing sleeve rotation driving means for rotating the developing sleeve of any one of the developing units; provided corresponding to each of the plurality of toner replenishing units; a toner conveying screw rotation drive means for rotating; and a developer stirring shaft rotation drive means for rotating the developer stirring shaft at least from the start of the developing operation of the first color developing device to the developing operation of the final color developing device. A developer stirring shaft rotation drive signal is sent to rotate the developer agitation shaft until the end of the developer stirring, and a toner conveyance screw rotation drive signal is sent to the toner conveyance screw rotation drive means to rotate the toner conveyance screw in accordance with the toner concentration. An image forming apparatus comprising: rotational drive control means for sending a developing sleeve rotational drive signal to the developing sleeve rotational drive means for rotating the developing sleeve of a developing device that performs a developing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019204A JPH01193877A (en) | 1988-01-29 | 1988-01-29 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63019204A JPH01193877A (en) | 1988-01-29 | 1988-01-29 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01193877A true JPH01193877A (en) | 1989-08-03 |
Family
ID=11992830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63019204A Pending JPH01193877A (en) | 1988-01-29 | 1988-01-29 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01193877A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561817B2 (en) | 2005-02-28 | 2009-07-14 | Brother Kogyo Kabushiki Kaisha | Toner cartridges, development cartridges, and image forming apparatus including such cartridges |
| US8000634B2 (en) | 2005-02-28 | 2011-08-16 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and cartridge |
| US8224215B2 (en) | 2005-02-28 | 2012-07-17 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and removable cartridge |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61270774A (en) * | 1985-05-27 | 1986-12-01 | Toshiba Corp | Toner density control device |
-
1988
- 1988-01-29 JP JP63019204A patent/JPH01193877A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61270774A (en) * | 1985-05-27 | 1986-12-01 | Toshiba Corp | Toner density control device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561817B2 (en) | 2005-02-28 | 2009-07-14 | Brother Kogyo Kabushiki Kaisha | Toner cartridges, development cartridges, and image forming apparatus including such cartridges |
| US8000634B2 (en) | 2005-02-28 | 2011-08-16 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and cartridge |
| US8224215B2 (en) | 2005-02-28 | 2012-07-17 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and removable cartridge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3451468B2 (en) | Toner supply device | |
| JP4399434B2 (en) | Image forming apparatus and image forming method | |
| US5510882A (en) | Developing device having an improved agitation and conveyance device | |
| JPH01193877A (en) | Image forming device | |
| JPH11160985A (en) | Developer supplying device | |
| JPH0626916Y2 (en) | Copier developing device | |
| JP2004012652A (en) | Image forming apparatus | |
| JPH03196072A (en) | Developing device | |
| US11112730B2 (en) | Developing device allowing selection of a stirring/conveying member to be used from a plurality of types of stirring/conveying members with rotary shafts with different shaft-diameters and image forming apparatus therewith | |
| JP2932934B2 (en) | Developing device | |
| JPH04125670A (en) | Image forming device | |
| JPH11133711A (en) | Developing device | |
| JP2006010758A (en) | Developing device | |
| JP3069660B2 (en) | Developing device | |
| JPH04134469A (en) | Developing device | |
| JPH01147564A (en) | Developing device | |
| JP3659587B2 (en) | Image forming apparatus | |
| JP3326459B2 (en) | Developing device | |
| JPH0943989A (en) | Multiple color image forming device | |
| JPH056090A (en) | Two component developing device | |
| JPH05289496A (en) | Developing device | |
| JPH07152234A (en) | Developing device | |
| JPS60122960A (en) | Multicolor developing method | |
| JPH04350869A (en) | Image forming device | |
| JPH03196073A (en) | Developing device |