JP2610535B2 - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JP2610535B2 JP2610535B2 JP2063831A JP6383190A JP2610535B2 JP 2610535 B2 JP2610535 B2 JP 2610535B2 JP 2063831 A JP2063831 A JP 2063831A JP 6383190 A JP6383190 A JP 6383190A JP 2610535 B2 JP2610535 B2 JP 2610535B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- tank
- replenishing
- supply
- developing
- 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.)
- Expired - Fee Related
Links
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- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、複写機やレーザープリンター等の画像形成
装置における現像装置に関する。The present invention relates to a developing device in an image forming apparatus such as a copying machine or a laser printer.
＜従来技術＞ 従来の画像形成装置における現像装置は、第５図の如
く、現像槽１へトナーを補給する補給槽２が現像槽１の
補給口３の上部に装着されているもの（従来例１）と、
第６図の如く、補給槽２が光学系の光路（第４図参照）
に干渉するのを防止し、かつ画像形成装置の小型化を図
るために、現像槽１の側方に補給槽２を配置し、補給槽
２内にトナーを補給口３へ案内するトナー搬送アーム４
を設けたもの（従来例２）とがある。<Prior Art> A developing device in a conventional image forming apparatus has a replenishing tank 2 for replenishing toner to a developing tank 1 mounted above a replenishing port 3 of the developing tank 1 as shown in FIG. 1) and
As shown in FIG. 6, the supply tank 2 is an optical path of the optical system (see FIG. 4).
In order to prevent interference with the image forming apparatus and reduce the size of the image forming apparatus, a replenishing tank 2 is arranged beside the developing tank 1, and a toner conveying arm for guiding toner to the replenishing port 3 in the replenishing tank 2. 4
(Conventional example 2).
なお、第5,6図中、５は感光体、６は現像ローラ、7,8
は撹拌ローラ、９は補給槽２に支持された補給ローラ、
10はトナー撹拌軸、11はトナー撹拌軸10の回転軸にトナ
ーを撹拌するコイルばね、12はドクター、13はトナーセ
ンサーである。5 and 6, reference numeral 5 denotes a photoconductor, 6 denotes a developing roller, and 7,8.
Denotes a stirring roller, 9 denotes a supply roller supported by the supply tank 2,
Reference numeral 10 denotes a toner stirring shaft, 11 denotes a coil spring for stirring toner around the rotation shaft of the toner stirring shaft 10, 12 denotes a doctor, and 13 denotes a toner sensor.
＜発明が解決しようとする課題＞ しかし、従来の現像装置においては、夫々次のような
欠点が指摘されている。<Problems to be Solved by the Invention> However, the following disadvantages have been pointed out in the conventional developing devices.
［従来例１］ 従来例１では、第５図の如く、補給槽２が現像槽１の
上部に配されているので、補給槽２が光学系の光路（第
４図参照）に干渉するのを防止するためには、どうして
も画像形成装置本体の上部を大型化する必要があり、装
置全体の小型化に限界をもたらしていた。[Conventional Example 1] In Conventional Example 1, as shown in FIG. 5, the replenishing tank 2 is disposed above the developing tank 1, so that the replenishing tank 2 interferes with the optical path of the optical system (see FIG. 4). In order to prevent this, it is absolutely necessary to enlarge the upper part of the image forming apparatus main body, which limits the miniaturization of the entire apparatus.
しかも、補給槽２の容量も制限を受けるため、トナー
容量不足となり補給槽２へのトナー追加回数が多くな
る。In addition, since the capacity of the replenishing tank 2 is also limited, the toner capacity becomes insufficient and the number of times of toner addition to the replenishing tank 2 increases.
［従来例２］ 従来例２では、補給槽２を現像槽１の側方に配置して
いるため、画像形成装置の小型化を図ることはできる
が、補給槽が一個であるためその容量に限界があり、高
速・中速度においては、作業者の補給槽２へのトナー追
加回数を増大するおそれがある。[Conventional Example 2] In Conventional Example 2, since the replenishing tank 2 is arranged on the side of the developing tank 1, the size of the image forming apparatus can be reduced, but since the number of replenishing tanks is one, the capacity is limited. There is a limit, and there is a possibility that the number of times toner is added to the replenishing tank 2 by the operator at high / medium speeds.
本発明は、上記課題に鑑み、画像形成装置の小型化を
図ることができ、かつ補給槽の容量を大としてトナーの
追加回数の削減を可能とする現像装置の提供を目的とす
る。An object of the present invention is to provide a developing device that can reduce the size of an image forming apparatus, increase the capacity of a replenishing tank, and reduce the number of toner additions in view of the above problems.
＜課題を解決するための手段＞ 本発明による課題解決手段は、第1,2図の如く、現像
槽31の側方に、第一補給槽32と、該第一補給槽32よりも
容量の大きい第二補給槽33とが連通状態で並設され、前
記現像槽31の上部と前記第一補給槽32との間にトナー補
給口46が形成され、該トナー補給口46よりも下方に前記
第一補給槽32の下部が位置し、前記第一補給槽32よりも
下方に前記第二補給槽33の下部が位置し、前記トナー補
給口46に、トナーを前記現像槽31へ補給するための補給
ローラ47が回転自在に支持され、前記第一補給槽32に、
トナーを前記トナー補給口46側へ搬送する第一搬送板34
が回転自在に収納支持され、前記第二補給槽33に、その
下部にたまつたトナーを押し上げて前記第一補給槽32側
へ搬送する第二搬送板35が回転自在に収納支持され、前
記第一搬送板34と第二搬送板35とがほぼ180度位相した
状態で取付けられ、前記第一搬送板34および第二搬送板
35が同期して回転するよう制御されたものである。<Means for Solving the Problems> As shown in FIGS. 1 and 2, the problem solving means according to the present invention comprises a first replenishing tank 32 and a capacity larger than the first replenishing tank 32 beside the developing tank 31. A large second supply tank 33 is juxtaposed in communication, and a toner supply port 46 is formed between the upper part of the developing tank 31 and the first supply tank 32, and the toner supply port 46 is provided below the toner supply port 46. The lower part of the first supply tank 32 is located, the lower part of the second supply tank 33 is located below the first supply tank 32, and the toner supply port 46 is used to supply toner to the developing tank 31. Is rotatably supported by the first supply tank 32,
First transport plate 34 that transports toner to the toner supply port 46 side
Is rotatably stored and supported, and the second supply tank 33 is rotatably stored and supported by the second supply tank 33, and a second transport plate 35 for pushing up the toner accumulated at the lower portion thereof and transporting the toner to the first supply tank 32 side. The first transfer plate 34 and the second transfer plate 35 are attached in a state where they are substantially 180 degrees out of phase, and the first transfer plate 34 and the second transfer plate 35 are attached.
35 is controlled to rotate synchronously.
また、前記第二搬送板35は、前記第一補給槽32の第二
補給槽33側の周縁とほぼ同レベルの高さまで回転したと
きに水平状態となるように配されている。Further, the second transport plate 35 is arranged so as to be in a horizontal state when rotated to a height substantially equal to the peripheral edge of the first supply tank 32 on the second supply tank 33 side.
＜作 用＞ 上記課題解決手段において、トナー補給時に、第一搬
送板34および第二搬送板35が同期して回転する。そうす
ると、第二搬送板35は、第二補給槽33の下部にたまつた
トナーを押し上げて第一補給槽32側へ搬送し、第二搬送
板35が第一補給槽32の第二補給槽33側の周縁とほぼ同レ
ベルの高さまで回転して水平状態となると、第一補給槽
32にはトナーが十分搬送された状態となる。このとき、
第二搬送板35とほぼ180度位相した第一搬送板34も水平
状態となつており、この第一搬送板34が無駄な回転なし
に第一補給槽32に搬送されたトナーをトナー補給口46側
に搬送する。そして、この搬送されたトナーを補給ロー
ラ47の回転によりトナー補給口46から現像槽31に補給す
る。<Operation> In the means for solving the above problems, the first transport plate 34 and the second transport plate 35 rotate synchronously when toner is supplied. Then, the second transport plate 35 pushes up the toner accumulated at the lower part of the second supply tank 33 and transports the toner to the first supply tank 32 side, and the second transport plate 35 is moved to the second supply tank of the first supply tank 32. When it rotates to the same level as the periphery on the 33 side and becomes horizontal, the first supply tank
At 32, the toner is sufficiently conveyed. At this time,
The first transport plate 34, which is approximately 180 degrees in phase with the second transport plate 35, is also in a horizontal state, and the first transport plate 34 transfers the toner transported to the first supply tank 32 without unnecessary rotation. Transport to 46 side. Then, the transported toner is supplied to the developing tank 31 from the toner supply port 46 by the rotation of the supply roller 47.
したがって、トナーの補給作業が円滑となり、補給槽
32,33内の残トナー量に左右されることなくトナー補給
を安定化することが可能となる。Therefore, the toner replenishment work becomes smooth and the replenishment tank
It is possible to stabilize toner supply without being influenced by the remaining toner amount in 32 and 33.
＜実 施 例＞ 以下、本発明の実施例を図面に基づいて説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
［第一実施例］ 第１図は本発明の現像装置を示す断面図、第２図は同
じくその補給槽内部を示す斜視図、第３図（ａ）（ｂ）
（ｃ）はトナー搬送動作を示す現像装置の断面図、第４
図は本発明の現像装置を利用した画像形成装置の全体構
成図である。First Embodiment FIG. 1 is a sectional view showing a developing device of the present invention, FIG. 2 is a perspective view showing the inside of a replenishing tank, and FIGS. 3 (a) and 3 (b).
FIG. 4C is a cross-sectional view of the developing device showing the toner transport operation, and FIG.
FIG. 1 is an overall configuration diagram of an image forming apparatus using a developing device of the present invention.
まず、本発明の現像装置を利用した画像形成装置につ
いて説明する。First, an image forming apparatus using the developing device of the present invention will be described.
一般に、画像形成装置は、第４図の如く、感光体20の
表面を帯電させる帯電装置21と、原稿に光を照射してそ
の反射光により感光体20の表面に静電潜像して形成する
光学系22と、感光体20の静電潜像を顕像化する現像装置
23と、給紙装置24からの転写紙に顕像化された感光体20
上のトナー像を転写する転写装置25と、感光体20上に残
留するトナーを除去するクリーニング装置26と、転写さ
れたトナー像を転写紙に定着させる定着装置27と、該定
着装置27に転写紙を搬送する搬送装置28と、定着装置27
により定着された転写紙を排紙する排紙装置29とから構
成されている。Generally, as shown in FIG. 4, an image forming apparatus includes a charging device 21 for charging the surface of a photoreceptor 20 and an electrostatic latent image formed on the surface of the photoreceptor 20 by irradiating a document with light and reflecting the light. Optical system 22 and a developing device for visualizing an electrostatic latent image on the photoconductor 20
23 and a photoconductor 20 visualized on transfer paper from a paper feeding device 24
A transfer device 25 for transferring the upper toner image, a cleaning device 26 for removing the toner remaining on the photoreceptor 20, a fixing device 27 for fixing the transferred toner image to transfer paper, and a transfer to the fixing device 27 A transport device 28 that transports the paper and a fixing device 27
And a paper discharging device 29 for discharging the transfer paper fixed by the printer.
そして、本発明請求項1,2に対応する第一実施例の前
記現像装置23は、第１図の如く、現像槽31の側方に、該
現像槽31にトナーを補給するための第一補給槽32と第二
補給槽33とが連通状態で並設されており、、前記第一補
給槽32に、トナーを現像槽31側へ搬送する第一搬送板34
が回転自在に収納支持され、第二補給槽33に、トナーを
第一搬送板34側へ搬送する第二搬送板35が回転自在に収
納支持され、前記第一搬送板34と第二搬送板35とがほぼ
180度位相した状態で取付けられ、第一搬送板34および
第二搬送板35が同期して回転するよう制御されたもので
ある。As shown in FIG. 1, the developing device 23 of the first embodiment according to the first and second aspects of the present invention has a first side for replenishing toner to the developing tank 31 beside the developing tank 31. A replenishing tank 32 and a second replenishing tank 33 are arranged side by side in communication with each other, and a first transport plate 34 for transporting toner to the developing tank 31 side is provided in the first replenishing tank 32.
Is rotatably stored and supported, and the second supply tank 33 is rotatably stored and supported in the second supply tank 33 for transporting the toner to the first transport plate 34 side. 35 and almost
The first carrier plate 34 and the second carrier plate 35 are mounted so as to be 180 degrees out of phase and controlled to rotate in synchronization.
前記現像槽31の感光体20と対向する側には、感光体20
に現像剤を供給するための現像剤供給用開口39が形成さ
れている。そして、該開口39側に現像ローラ40が回転自
在に配され、該現像ローラ40よりも感光体20から遠ざか
る方向に第二撹拌ローラ41および第一攪拌ローラ42が回
転自在に順次配されている。現像槽31の現像ローラ40の
情報の内壁には、ドクター43が固定されている。On the side of the developing tank 31 facing the photoconductor 20, a photoconductor 20 is provided.
Is formed with a developer supply opening 39 for supplying the developer. A developing roller 40 is rotatably disposed on the opening 39 side, and a second stirring roller 41 and a first stirring roller 42 are sequentially rotatably disposed in a direction away from the photoconductor 20 with respect to the developing roller 40. . A doctor 43 is fixed to the inner wall of the information of the developing roller 40 of the developing tank 31.
また、現像槽31の感光体20とは反対側の上部、トナー
を補給するためのトナー補給用開口44が形成され、該開
口44に、前記補給槽32,33が着脱自在に装着されてい
る。Further, an upper portion of the developing tank 31 opposite to the photoconductor 20 is formed with a toner replenishing opening 44 for replenishing toner, and the replenishing tanks 32 and 33 are detachably mounted in the opening 44. .
前記第一，第二補給槽32,33は、第1,2図の如く、夫々
略半円筒形に形成されて互いに一体とされたもので、第
二補給槽33は、第一補給槽32よりも大径に形成され、そ
れぞれの上部が連通状態とされる。As shown in FIGS. 1 and 2, the first and second supply tanks 32 and 33 are each formed in a substantially semi-cylindrical shape and integrated with each other. It is formed with a larger diameter than the above, and each upper part is in a communicating state.
前記第一補給槽32の現像槽31側の端部には、トナーを
現像槽31へ補給するためのトナー補給口46が形成されて
おり、該トナー補給口46には、トナーを現像槽31へ補給
するための補給ローラ47が回転自在に支持されている。
また、第一補給槽32の端部には、現像槽31のトナー補給
用開口44を塞ぐための蓋片48が形成されている。At the end of the first supply tank 32 on the side of the developing tank 31, a toner supply port 46 for supplying toner to the developing tank 31 is formed. A replenishing roller 47 for replenishing the toner is rotatably supported.
At the end of the first supply tank 32, a lid piece 48 for closing the toner supply opening 44 of the developing tank 31 is formed.
前記第一搬送板34および第二搬送板35は、各補給槽3
2,33内のトナーを搬送するための長片であり、夫々中心
軸51,52に取付けられた一対のアーム53,54の一端に成形
されている。また、アーム53,54の他端には、補給槽32,
33内のトナーを撹拌するためのコイル状の撹拌子55,56
が取付けられている。そして、第一搬送板34および第二
搬送板35は、互いに180度位相した状態でかつその板面
が互いに平行になるようにそれぞれの中心軸51,52に位
置決めされ、その中心軸51,52は、駆動装置（モータ
等）により同じ回転速度で第一図中時計回りに回転する
よう駆動制御されている。The first transport plate 34 and the second transport plate 35
A long piece for transporting the toner inside 2, 33 is formed at one end of a pair of arms 53, 54 attached to the central shafts 51, 52, respectively. Also, at the other end of the arms 53, 54, the replenishing tank 32,
Coil-shaped stir bar 55, 56 for stirring toner in 33
Is installed. Then, the first transport plate 34 and the second transport plate 35 are positioned on the respective central axes 51, 52 such that the plate surfaces thereof are 180 ° out of phase with each other and their plate surfaces are parallel to each other, and the central axes 51, 52 Is controlled so as to rotate clockwise in FIG. 1 at the same rotational speed by a drive device (such as a motor).
なお、第１図中、61は現像槽31内のトナーの濃度を検
知するトナーセンサー、第1,2図中、62は第一搬送板34
により持ち上げられたトナーをトナー補給ローラ47へ搬
送するための搬送アームである。In FIG. 1, reference numeral 61 denotes a toner sensor for detecting the concentration of toner in the developing tank 31, and in FIGS.
Is a transfer arm for transferring the toner lifted by the printer to the toner supply roller 47.
上記構成において、現像装置の動作を説明すると、第
３図（ａ）の如く、駆動装置により中心軸51,52を回転
駆動すると、第一搬送板34および第二搬送板35がそれぞ
れ時計回りに回転する。そして、第二搬送板35が、第二
補給槽33の下部にたまつたトナーＸを、同図（ｂ）のよ
うに第一補給槽32側へ押し上げる。そして、第二搬送板
35は、同図（ｃ）のようにトナーＸを第一補給槽32の下
部に持ち上げる。In the above configuration, the operation of the developing device will be described. As shown in FIG. 3 (a), when the center shafts 51 and 52 are driven to rotate by the driving device, the first transport plate 34 and the second transport plate 35 respectively rotate clockwise. Rotate. Then, the second transport plate 35 pushes up the toner X accumulated at the lower part of the second supply tank 33 toward the first supply tank 32 as shown in FIG. And the second transport plate
35 lifts the toner X to the lower part of the first supply tank 32 as shown in FIG.
次に、第一搬送板34が、第一補給槽32に搬送されたト
ナーＸを、さらに現像槽31側の搬送アーム62に搬送し、
搬送アーム62によりトナーＸが補給ローラ47の方向に第
一搬送板34上から送り出される。Next, the first transport plate 34 further transports the toner X transported to the first supply tank 32 to the transport arm 62 on the developing tank 31 side,
The toner X is sent from the first transport plate 34 in the direction of the supply roller 47 by the transport arm 62.
しかる後、補給ローラ47の回転により、トナー補給口
46より現像槽31内にトナーＸが補給される。Thereafter, the rotation of the supply roller 47 causes the toner supply port to rotate.
From 46, the toner X is supplied into the developing tank 31.
このように、現像槽31の側方に、第一補給槽32と第二
補給槽33とが連通状態で並設され、第一補給槽32の第一
搬送板34と第二補給槽33の第二搬送板35とがほぼ180度
位相した状態で取付けられ、第一搬送板34および第二搬
送板35が同期して回転するよう制御されているので、ト
ナーが第一補給槽32内に十分ある時は、第一補給槽32よ
り現像槽31へトナーが補給され、第一補給槽32内のトナ
ー量が少なくなると、第二補給槽33よりトナーが補充さ
れ、第一補給槽32内にトナーが満たされる。In this manner, the first supply tank 32 and the second supply tank 33 are arranged side by side in communication with the side of the development tank 31, and the first transfer plate 34 and the second supply tank 33 of the first supply tank 32 are connected to each other. Since the second transport plate 35 and the second transport plate 35 are mounted in a state of being substantially 180 degrees out of phase and the first transport plate 34 and the second transport plate 35 are controlled to rotate in synchronization, the toner is stored in the first supply tank 32. When there is enough, toner is supplied from the first supply tank 32 to the developing tank 31, and when the amount of toner in the first supply tank 32 decreases, toner is supplied from the second supply tank 33, and Is filled with toner.
そうすると、高速・中速機の比較的大容量のトナーを
必要とする現像装置においても、トナーの容量を確保し
つつ薄形化できるので、光学系の光路に干渉することな
く現像装置をレイアウトすることができる。したがつ
て、画像形成装置全体の高さを低くできる等の小型化が
実現でき、しかも、トナー容量を多くしてトナーの補充
回数を削減することができる。Then, even in a high-speed / medium-speed developing device requiring a relatively large amount of toner, the developing device can be thinned while securing the toner capacity, so that the developing device can be laid out without interfering with the optical path of the optical system. be able to. Accordingly, downsizing such as reduction in the height of the entire image forming apparatus can be realized, and the number of toner replenishments can be reduced by increasing the toner capacity.
また、各補給槽内の搬送板34,35を同期して回転させ
ることによりトナーの補給作業が円滑となり、そのた
め、補給槽32,33内のトナー量に左右されることなくト
ナー補給を安定化することが可能となる。Rotating the transport plates 34 and 35 in each replenishing tank in a synchronized manner facilitates the toner replenishment work, and stabilizes toner replenishment without being affected by the amount of toner in the replenishing tanks 32 and 33. It is possible to do.
なお、本発明は、上記実施例に限定されるものではな
く、本発明の範囲内で上記実施例に多くの修正および変
更を加え得ることは勿論である。It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention.
＜発明の効果＞ 以上の説明から明らかな通り、本発明では、現像槽の
側方に、第一補給槽と、該第一補給槽よりも容量の大き
い第二補給槽とが連通状態で並設されているので、トナ
ーの容量を確保しつつ薄形化でき、光学系の光路に干渉
することなく現像装置をレイアウトすることができる。<Effects of the Invention> As is apparent from the above description, in the present invention, the first replenishment tank and the second replenishment tank having a larger capacity than the first replenishment tank are arranged side by side in a communicating state on the side of the developing tank. As a result, it is possible to reduce the thickness of the developing device while securing the capacity of the toner, and to lay out the developing device without interfering with the optical path of the optical system.
したがつて、画像形成装置全体の高さを低くできる等
の小型化が実現できる。しかも、トナー容量を多くする
ことができるので、高速・中速機の比較的大容量のトナ
ーを必要とする現像装置においても、トナーの補充回数
を削減することができる。Accordingly, downsizing such as reduction in the height of the entire image forming apparatus can be realized. In addition, since the toner capacity can be increased, the number of times of toner replenishment can be reduced even in a developing device requiring a relatively large capacity toner such as a high-speed / medium-speed machine.
また、第二搬送板により第二補給槽の下部にたまつた
トナーを押し上げて上方の第一補給槽に、第一搬送板よ
り第一補給槽の下部にたまつたトナーを上方のトナー補
給口に順次搬送して、トナー補給口から現像槽にトナー
を補給しているので、第一および第二補給槽の残トナー
量に左右されることなく、一定量のトナーを安定して現
像槽に補給して、現像槽内の残トナー量を一定に保つこ
とが可能となる。The second carrier plate pushes up the toner accumulated in the lower part of the second replenishing tank to supply the toner accumulated in the lower part of the first replenishment tank from the first carrier plate to the upper first replenishing tank. Since the toner is replenished to the developing tank from the toner replenishing port by sequentially transporting the toner to the developing tank, a fixed amount of toner is stably supplied without being influenced by the remaining toner amount in the first and second replenishing tanks. And the amount of residual toner in the developing tank can be kept constant.
さらに、第一搬送板と第二搬送板とがほぼ180度位相
した状態で取付けられ、かつ、同期して回転するよう制
御されているので、第二搬送板により第二補給槽の下部
にたまつたトナーを第一補給槽に押し上げたとき、すぐ
にこのトナーを第一搬送板によりトナー補給口側に搬送
して、十分なトナーをタイミングよく現像槽側に補給で
き、トナーの補給作業が円滑に行える。Furthermore, since the first transport plate and the second transport plate are mounted in a state of being substantially 180 degrees out of phase, and are controlled to rotate in synchronization, the first transport plate and the second transport plate are positioned below the second supply tank by the second transport plate. When the collected toner is pushed up to the first replenishing tank, the toner is immediately conveyed to the toner replenishing port side by the first conveying plate, and sufficient toner can be replenished to the developing tank side in a timely manner. It can be done smoothly.
また、第二搬送板を、第一補給槽の第二補給槽側の周
縁とほぼ同レベルの高さまで回転したときに水平状態と
なるように配すると、第二搬送板により第一補給槽にト
ナーを十分搬送したとき第一搬送板は水平状態となるの
で、第一補給槽に搬送されたトナーを第一搬送板により
搬送する際に第一搬送板の無駄な回転をなくすことがで
き、より速くかつ十分なトナーを現像槽側に補給できる
といつた優れた効果がある。Further, when the second transport plate is arranged so as to be in a horizontal state when rotated to a height substantially equal to the level of the peripheral edge of the first supply tank on the side of the second supply tank, the second transfer plate is provided in the first supply tank by the second transfer plate. When the toner is sufficiently conveyed, the first conveyance plate is in a horizontal state, so that when the toner conveyed to the first supply tank is conveyed by the first conveyance plate, unnecessary rotation of the first conveyance plate can be eliminated, There is an excellent effect that faster and sufficient toner can be supplied to the developing tank side.
第１図は本発明の現像装置を示す断面図、第２図は同じ
くその補給槽内部を示す斜視図、第３図（ａ）（ｂ）
（ｃ）はトナー搬送動作を示す現像装置の断面図、第４
図は本発明の現像装置を利用した画像形成装置の全体構
成図、第５図は従来例１の現像装置を示す断面図、第６
図は従来例２の現像装置を示す断面図である。 31:現像槽、32:第一補給槽、33:第二補給槽、34:第一搬
送板、35:第二搬送板。FIG. 1 is a sectional view showing the developing device of the present invention, FIG. 2 is a perspective view showing the inside of the replenishing tank, and FIGS.
FIG. 4C is a cross-sectional view of the developing device showing the toner transport operation, and FIG.
FIG. 5 is an overall configuration diagram of an image forming apparatus using the developing device of the present invention. FIG. 5 is a cross-sectional view illustrating the developing device of Conventional Example 1, and FIG.
FIG. 1 is a cross-sectional view illustrating a developing device of Conventional Example 2. 31: developing tank, 32: first supply tank, 33: second supply tank, 34: first transport plate, 35: second transport plate.
Claims (2)
給槽よりも容量の大きい第二補給槽とが連通状態で並設
され、前記現像槽の上部と前記第一補給槽との間にトナ
ー補給口が形成され、該トナー補給口よりも下方に前記
第一補給槽の下部が位置し、前記第一補給槽よりも下方
に前記第二補給槽の下部が位置し、前記トナー補給口
に、トナーを前記現像槽へ補給するための補給ローラが
回転自在に支持され、前記第一補給槽に、トナーを前記
トナー補給口側へ搬送する第一搬送板が回転自在に収納
支持され、前記第二補給槽に、その下部にたまつたトナ
ーを押し上げて前記第一補給槽側へ搬送する第二搬送板
が回転自在に収納支持され、前記第一搬送板と第二搬送
板とがほぼ180度位相した状態で取付けられ、前記第一
搬送板および第二搬送板が同期して回転するように制御
されたことを特徴とする現像装置。A first replenishing tank and a second replenishing tank having a larger capacity than the first replenishing tank are provided side by side in a communicating state on a side of the developing tank. A toner supply port is formed between the first supply tank and the toner supply port, and a lower portion of the second supply tank is located below the toner supply port. A replenishing roller for replenishing toner to the developing tank is rotatably supported at the toner replenishing port, and a first transport plate for transporting toner to the toner replenishing port side rotates in the first replenishing tank. The second supply tank is rotatably stored and supported, and the second supply tank is rotatably received and supported by the second supply tank, and a second transfer plate that pushes up the toner accumulated at a lower portion thereof and transports the toner to the first supply tank side. The second transfer plate and the second transfer plate are attached in a state of being substantially 180 degrees out of phase, and the first transfer plate and the second transfer plate are attached. There developing apparatus is characterized in that it is controlled to rotate synchronously.
補給槽側の周縁とほぼ同レベルの高さまで回転したとき
に水平状態となるように配されたことを特徴とする請求
項１記載の現像装置。2. The apparatus according to claim 1, wherein said second transport plate is arranged so as to be in a horizontal state when rotated to a height substantially equal to a peripheral edge of said first supply tank on a side of said second supply tank. The developing device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063831A JP2610535B2 (en) | 1990-03-13 | 1990-03-13 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2063831A JP2610535B2 (en) | 1990-03-13 | 1990-03-13 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03263071A JPH03263071A (en) | 1991-11-22 |
| JP2610535B2 true JP2610535B2 (en) | 1997-05-14 |
Family
ID=13240692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2063831A Expired - Fee Related JP2610535B2 (en) | 1990-03-13 | 1990-03-13 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2610535B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4816084B2 (en) * | 2003-08-25 | 2011-11-16 | ダイキン工業株式会社 | High frequency signal transmission product, manufacturing method thereof, and high frequency transmission cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63213877A (en) * | 1987-03-03 | 1988-09-06 | Minolta Camera Co Ltd | Electrostatic latent image developing device |
-
1990
- 1990-03-13 JP JP2063831A patent/JP2610535B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03263071A (en) | 1991-11-22 |
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