JPH0221591B2 - - Google Patents

Info

Publication number
JPH0221591B2
JPH0221591B2 JP57209223A JP20922382A JPH0221591B2 JP H0221591 B2 JPH0221591 B2 JP H0221591B2 JP 57209223 A JP57209223 A JP 57209223A JP 20922382 A JP20922382 A JP 20922382A JP H0221591 B2 JPH0221591 B2 JP H0221591B2
Authority
JP
Japan
Prior art keywords
developer
carrier
toner
developing device
stirring
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 - Lifetime
Application number
JP57209223A
Other languages
Japanese (ja)
Other versions
JPS59100471A (en
Inventor
Tamotsu Sakamoto
Shuji Tanaka
Yoshikazu Okamoto
Kazuharu Sasaki
Yoshio Inoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP57209223A priority Critical patent/JPS59100471A/en
Publication of JPS59100471A publication Critical patent/JPS59100471A/en
Publication of JPH0221591B2 publication Critical patent/JPH0221591B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0844—Arrangements for purging used developer from the developing unit

Description

【発明の詳細な説明】 本発明は、二成分現像剤の現像特性を一定に保
持させたまま現像剤の交換作業を必要としない電
子写真複写機用現像装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device for an electrophotographic copying machine that does not require replacing the developer while maintaining constant development characteristics of the two-component developer.

二成分現像剤を用いる現像装置においては、現
像剤は或る複写枚数で劣化し使用不能となるた
め、複写機より現像装置を取外し、現像装置に設
けられている現像剤取出し口より現像剤を抜取
り、新しい現像剤を充填していた。 In a developing device that uses a two-component developer, the developer degrades after a certain number of copies and becomes unusable. Therefore, remove the developing device from the copying machine and remove the developer from the developer outlet provided in the developing device. It was removed and filled with new developer.

この現像剤交換作業時には、鉄製のキヤリアに
より現像装置が重くて、同装置の取付け取外しに
筋力を必要とし、トナーが空中に舞上つて衛生上
好ましくない。 When replacing the developer, the iron carrier makes the developing device heavy, requiring muscle strength to attach and remove the device, and the toner flies into the air, which is undesirable from a sanitary standpoint.

しかも、現像剤交換前後の現像剤の現像特性が
大巾に変化するため、複写物の画質も著しく変化
する。 Moreover, since the developing characteristics of the developer before and after the developer is replaced vary widely, the image quality of the copies also changes significantly.

本発明はこのような難点を克服した電子写真複
写機用現像装置の改良に係り、その目的とする処
は、古い現像剤を自動的に回収し現像剤の現像特
性を一定に維持させることができるとともに現像
剤の交換作業が不必要な現像装置を供する点にあ
る。 The present invention relates to an improvement of a developing device for an electrophotographic copying machine that overcomes these difficulties, and its purpose is to automatically collect old developer and maintain constant development characteristics of the developer. The object of the present invention is to provide a developing device that can be used in a variety of applications and that does not require developer replacement work.

すなわち本発明は、キヤリアとトナーを撹拌す
る撹拌手段と、同撹拌手段で撹拌された現像剤を
感光体へ供給する現像ロールとを備えた電子写真
複写機用現像装置において、前記撹拌手段の上方
にキヤリア補給装置とトナー補給装置とを分離し
または一体化して設け、前記撹拌手段の撹拌によ
り移動する貯溜現像剤の移動下流側に存する現像
ハウジング側壁の所定高さ位置に現像剤溢出部を
設けた電子写真複写機用現像装置である。 That is, the present invention provides a developing device for an electrophotographic copying machine, which is provided with a stirring means for stirring carrier and toner, and a developing roll that supplies the developer stirred by the stirring means to a photoreceptor. A carrier replenishment device and a toner replenishment device are provided separately or integrally, and a developer overflow portion is provided at a predetermined height position on a side wall of the developer housing on the downstream side of movement of the stored developer that moves due to stirring by the stirring means. This is a developing device for an electrophotographic copying machine.

現像ハウジングに貯溜された現像剤は撹拌手段
により移動して溢出部を有する現像ハウジング側
壁側に偏つて溜まり、主に古くなつた現像剤が該
側壁の所定高さ位置に設けられた溢出部より溢れ
出て自動的に排出される。 The developer stored in the developer housing is moved by the stirring means and accumulates toward the side wall of the developer housing that has an overflow portion, and mainly old developer is collected from the overflow portion provided at a predetermined height position on the side wall. It overflows and is automatically drained.

以下図面に図示された本発明の一実施例につい
て説明する。 An embodiment of the present invention illustrated in the drawings will be described below.

１は乾式電子写真複写機におけるドラム状感光
体で、同感光体１は時計方向へ回転駆動されるよ
うになつている。 Reference numeral 1 denotes a drum-shaped photoreceptor in a dry type electrophotographic copying machine, and the photoreceptor 1 is adapted to be rotated clockwise.

また図示されないドラム状感光体露出部より回
転方向に沿つた側に現像装置ハウジング２が配設
され、同ハウジング２の感光体１寄りに現像ロー
ルたるマグロール３が反時計方向へ回転駆動され
るように枢支されている。 Further, a developing device housing 2 is disposed on the side along the rotational direction from an exposed portion of a drum-shaped photoreceptor (not shown), and a mag roll 3, which is a developing roll, is rotated counterclockwise near the photoreceptor 1 of the housing 2. is supported by

さらに前記ハウジング２の底部内において、チ
ヤンネル状の撹拌部材４の開口部を半径方向に指
向させた状態で周方向へ所定間隔毎に同撹拌部材
４を配置してなる撹拌手段５が、反時計方向へ回
転駆動されるように枢支されている。 Furthermore, within the bottom of the housing 2, a stirring means 5 is provided which is configured by disposing channel-shaped stirring members 4 at predetermined intervals in the circumferential direction with the openings of the stirring members 4 oriented in the radial direction. It is pivotally supported so as to be rotationally driven in the direction.

さらにまた撹拌手段５の上方にキヤリアボツク
ス６とトナーボツクス８とが配設され、同ボツク
ス６，８の底部にキヤリアデイスペンスロール７
とトナーデイスペンスロール９とが枢支されてお
り、マグロール３および撹拌手段５の稼動に対応
して前記両デイスペンスロール７，９が微小回転
されて、キヤリア１０ａおよびトナー１０ｂが小
量づつハウジング２内に補給されるようになつて
いる。 Furthermore, a carrier box 6 and a toner box 8 are disposed above the stirring means 5, and a carrier dispense roll 7 is disposed at the bottom of the boxes 6 and 8.
and a toner dispense roll 9 are pivotally supported, and in response to the operation of the mag roll 3 and the stirring means 5, both the dispense rolls 7 and 9 are slightly rotated, and the carrier 10a and the toner 10b are delivered in small amounts to the housing. It is designed to be replenished within 2 days.

しかも感光体１の配置位置と反対側のハウジン
グ２の側壁に現像剤溢出口１１が形成され、同溢
出口１１より下方へ排出パイプ１２が接続されて
おり、同排出パイプ１２の下端に現像剤回収タン
ク１３が着脱自在に装着されるようになつてい
る。 Moreover, a developer overflow port 11 is formed in the side wall of the housing 2 opposite to the placement position of the photoreceptor 1, and a discharge pipe 12 is connected downward from the overflow port 11. The recovery tank 13 is detachably attached.

図示の実施例は前記したように構成されている
ため、新しいキヤリア１０ａおよびトナー１０ｂ
を充填した現像装置ハウジング２内の現像剤１０
の帯電量は、第２図に図示されるように、複写回
数の少ない状態では極めて高いが、複写回数が増
加するにつれて漸次低下する。 The illustrated embodiment is constructed as described above so that a new carrier 10a and toner 10b
The developer 10 in the developing device housing 2 filled with
As shown in FIG. 2, the amount of charge is extremely high when the number of copies is small, but gradually decreases as the number of copies is increased.

しかし、キヤリアボツクス６およびトナーボツ
クス８内のキヤリア１０ａおよびトナー１０ｂ
は、マグロール３および撹拌部材４の回転に伴な
い回転するキヤリアデイスペンスロール７および
トナーデイスペンスロール９により、微少量づつ
ハウジング２内に補給されて、撹拌部材４により
古い現像剤と均一に撹拌混合されるとともに、前
記現像剤溢出口１１より余剰現像剤１０が溢出さ
れる。 However, the carrier 10a and toner 10b in the carrier box 6 and toner box 8
is replenished into the housing 2 in minute amounts by the carrier dispense roll 7 and toner dispense roll 9, which rotate with the rotation of the mag roll 3 and the stirring member 4, and is evenly mixed with the old developer by the stirring member 4. While being mixed, surplus developer 10 overflows from the developer overflow port 11.

従つて複写回数が或る回数を越えると、現像装
置ハウジング２内の現像剤の帯電量は一定に保持
される。 Therefore, when the number of copies exceeds a certain number, the amount of charge of the developer in the developing device housing 2 is kept constant.

また使用済み現像剤１０は現像剤溢出口１１よ
り排出パイプ１２を介して現像剤回収タンク１３
に自動的に回収されるため、単に現像剤回収タン
ク１３の着脱のみで足り、従来のような手間のか
かる現像剤交換作業が不必要となる。 Further, the used developer 10 is transferred from a developer overflow port 11 to a developer recovery tank 13 via a discharge pipe 12.
Since the developer is automatically collected, it is sufficient to simply attach and detach the developer recovery tank 13, eliminating the need for the conventional and time-consuming task of replacing the developer.

さらに従来のような現像剤交換作業が不必要と
なるため、現像剤の舞上がりが阻止され、衛生的
である。 Furthermore, since there is no need to replace the developer as in the conventional method, the developer is prevented from flying up, which is sanitary.

さらにまた撹拌手段５の回転力を利用し、現像
剤１０を排出させるようにしたため、構造は複雑
化せず、従来のものとコスト的に左程変らない。 Furthermore, since the rotational force of the stirring means 5 is used to discharge the developer 10, the structure is not complicated and the cost is not much different from that of the conventional one.

また図示の実施例では、キヤリアボツクス６、
キヤリアデイスペンスロール７およびトナーボツ
クス８、トナーデイスペンスロール９と現像剤溢
出口１１とは、撹拌手段５の回転軸に対して直角
な鉛直面に沿つて配置されているが、現像剤補給
手段６，７，８，９を撹拌手段５の回転軸の一端
側に配置するとともに現像剤溢出口１１を同回転
軸の他端側に配置してもよく、このようにすれ
ば、新しい現像剤１０の一部が充分に現像作用に
供せられずに排出されることを未然に阻止するこ
とができる。この場合に撹拌手段５に、軸方向に
も現像剤を移送するオーガー等の移送機能を持た
せるとよい。 Further, in the illustrated embodiment, the carrier box 6,
The carrier dispense roll 7, the toner box 8, the toner dispense roll 9, and the developer overflow port 11 are arranged along a vertical plane perpendicular to the rotation axis of the stirring means 5. 6, 7, 8, and 9 may be arranged at one end of the rotating shaft of the stirring means 5, and the developer overflow port 11 may be arranged at the other end of the rotating shaft. It is possible to prevent a part of 10 from being discharged without being sufficiently subjected to the development action. In this case, it is preferable that the stirring means 5 has a transporting function such as an auger for transporting the developer also in the axial direction.

さらにキヤリア１０ａとトナー１０ｂとを予め
混合した高濃度現像剤を用いれば、キヤリア補給
手段６，７とトナー補給手段８，９を１つにまと
めることができ、構造が簡単となる。 Further, by using a high-concentration developer in which the carrier 10a and the toner 10b are mixed in advance, the carrier replenishing means 6, 7 and the toner replenishing means 8, 9 can be combined into one, which simplifies the structure.

このような現像装置では、キヤリア１０ａが小
粒径化しても、デイスペンス機構に特別な配慮を
払わなくてもよく、特にキヤリア径が10〜40μm
程度のトナー粒径と同等または非常に近い範囲に
なると、従来のトナーデイスペンス機構がそのま
ま適用でき、コスト的に有利となる。 In such a developing device, even if the carrier 10a has a small particle size, there is no need to pay special consideration to the dispensing mechanism, especially when the carrier diameter is 10 to 40 μm.
When the toner particle size is in the same or very close range, the conventional toner dispensing mechanism can be applied as is, which is advantageous in terms of cost.

本発明では、キヤリアとトナーを撹拌する撹拌
手段と、同撹拌手段で撹拌された現像剤を感光体
へ供給する現像ロールとを備えた電子写真複写機
用現像装置において、前記撹拌手段の上方にキヤ
リア補給装置とトナー補給装置とを分離しまたは
一体化して設け、現像装置ハウジングの側壁に現
像剤溢出部を設けたため、新しい現像剤を前記補
給装置により少しづつ補給するとともに前記現像
剤溢出部より排出することができ、前記現像装置
ハウジング内の現像剤の特性を一定に維持させる
ことができ、その結果、複写物の画質も一定に保
持させることができる。 In the present invention, in a developing device for an electrophotographic copying machine, which includes a stirring means for stirring the carrier and toner, and a developing roll that supplies the developer stirred by the stirring means to the photoreceptor, a portion above the stirring means is provided. Since the carrier replenishment device and the toner replenishment device are provided separately or integrated, and a developer overflow portion is provided on the side wall of the developing device housing, new developer is replenished little by little by the replenishment device, and new developer is supplied from the developer overflow portion. The characteristics of the developer in the developing device housing can be maintained constant, and as a result, the image quality of copies can also be maintained constant.

また本発明においては、前記現像装置ハウジン
グ内の古くなつた現像剤は前記現像剤溢出部より
順次自動的に排出されるため、従来のもののよう
に、現像装置を複写機より外し、同装置のハウジ
ング内の古い現像剤を取出し、新しい現像剤を再
充填した後、再び現像装置を取付けるといつた面
倒な現像剤交換作業が不必要となり、しかも現像
剤飛散が防止されて衛生的である。 Further, in the present invention, since the old developer in the developing device housing is automatically discharged sequentially from the developer overflowing portion, the developing device can be removed from the copying machine as in the conventional case. After taking out the old developer in the housing and refilling it with new developer, the troublesome developer replacement work such as reinstalling the developing device becomes unnecessary, and furthermore, developer scattering is prevented, making it sanitary.

さらに本発明では、前記ハウジング内の現像剤
に新しく補給された現像剤は、前記撹拌手段のみ
で均一に混合されるため、構造が簡単で、コスト
が安い。 Furthermore, in the present invention, the newly replenished developer in the housing is uniformly mixed only by the stirring means, so the structure is simple and the cost is low.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る電子写真複写機用現像装
置の一実施例を図示した横断側面図、第２図は同
実施例の現像特性を図示した特性図である。 １……ドラム状感光体、２……現像装置ハウジ
ング、３……マグロール、４……撹拌部材、５…
…撹拌手段、６……キヤリアボツクス、７……キ
ヤリアデイスペンスロール、８……トナーボツク
ス、９……トナーデイスペンスロール、１０……
現像剤、１０ａ……キヤリア、１０ｂ……トナ
ー、１１……現像剤溢出口、１２……排出パイ
プ、１３……現像剤回収タンク。 FIG. 1 is a cross-sectional side view showing an embodiment of a developing device for an electrophotographic copying machine according to the present invention, and FIG. 2 is a characteristic diagram showing the developing characteristics of the same embodiment. DESCRIPTION OF SYMBOLS 1... Drum-shaped photoreceptor, 2... Developing device housing, 3... Mag roll, 4... Stirring member, 5...
...Agitation means, 6...Carrier box, 7...Carrier dispense roll, 8...Toner box, 9...Toner dispense roll, 10...
Developer, 10a...Carrier, 10b...Toner, 11...Developer overflow port, 12...Discharge pipe, 13...Developer recovery tank.

Claims (1)

【特許請求の範囲】[Claims] １ キヤリアとトナーを撹拌する撹拌手段と、同
撹拌手段で撹拌された現像剤を感光体へ供給する
現像ロールとを備えた電子写真複写機用現像装置
において、前記撹拌手段の上方にキヤリア補給装
置とトナー補給装置とを分離しまたは一体化して
設け、前記撹拌手段の撹拌により移動する貯溜現
像剤の移動下流側に存する現像ハウジング側壁の
所定高さ位置に現像剤溢出部を設けたことを特徴
とする電子写真複写機用現像装置。1. In a developing device for an electrophotographic copying machine, which includes a stirring means for stirring the carrier and toner, and a developing roll that supplies the developer stirred by the stirring means to the photoreceptor, a carrier replenishing device is provided above the stirring means. and a toner replenishing device are provided separately or integrally, and a developer overflow portion is provided at a predetermined height position on the side wall of the developer housing on the downstream side of movement of the stored developer moved by the stirring of the stirring means. A developing device for an electrophotographic copying machine.
JP57209223A 1982-12-01 1982-12-01 Developing device for electrophotographic copying machine Granted JPS59100471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57209223A JPS59100471A (en) 1982-12-01 1982-12-01 Developing device for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57209223A JPS59100471A (en) 1982-12-01 1982-12-01 Developing device for electrophotographic copying machine

Publications (2)

Publication Number Publication Date
JPS59100471A JPS59100471A (en) 1984-06-09
JPH0221591B2 true JPH0221591B2 (en) 1990-05-15

Family

ID=16569383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57209223A Granted JPS59100471A (en) 1982-12-01 1982-12-01 Developing device for electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS59100471A (en)

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US6617088B2 (en) 2000-05-22 2003-09-09 Fuji Xerox Co., Ltd. Developer and image forming method
US6920301B2 (en) 2001-07-31 2005-07-19 Canon Kabushiki Kaisha Rotary developing apparatus with developer recovery
JP2005326708A (en) * 2004-05-17 2005-11-24 Ricoh Co Ltd Image forming apparatus, process cartridge, development device and cleaning device
US7190924B2 (en) 2003-09-30 2007-03-13 Kabushiki Kaisha Toshiba Image forming apparatus that eliminates the inadvertence of mixed color toners and image forming method
WO2007066800A1 (en) 2005-12-05 2007-06-14 Canon Kabushiki Kaisha Developer for replenishment and image forming method
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JP2008158223A (en) * 2006-12-22 2008-07-10 Ricoh Co Ltd Carrier, supplementary developer, developer in development unit, developer replenisher, image forming apparatus, and process cartridge
US7536138B2 (en) 2006-04-14 2009-05-19 Sharp Kabushiki Kaisha Developer with developer level control, and image forming apparatus having same
US7630670B2 (en) 2005-09-08 2009-12-08 Canon Kabushiki Kaisha Developing apparatus and image forming apparatus
US8489000B2 (en) 2009-07-17 2013-07-16 Canon Kabushiki Kaisha Developing apparatus for an image forming apparatus
US8526847B2 (en) 2010-07-01 2013-09-03 Konica Minolta Business Technologies, Inc. Image forming apparatus and developing device
US8526858B2 (en) 2009-09-10 2013-09-03 Canon Kabushiki Kaisha Image forming apparatus having color and transparent developing devices
US8532538B2 (en) 2010-02-09 2013-09-10 Canon Kabushiki Kaisha Image forming apparatus featuring supply of developers having different toner ratios
JP2014132290A (en) * 2013-01-04 2014-07-17 Ricoh Co Ltd Image forming apparatus and developer recovery method
JP2014157319A (en) * 2013-02-18 2014-08-28 Ricoh Co Ltd Carrier supply device, process cartridge and image forming apparatus
US9134650B2 (en) 2012-12-12 2015-09-15 Konica Minolta, Inc. Developing device and image forming apparatus
US9436130B2 (en) 2014-09-24 2016-09-06 Canon Kabushiki Kaisha Developing device
US9442425B2 (en) 2014-05-23 2016-09-13 Canon Kabushiki Kaisha Developing apparatus and image forming apparatus
US9946191B2 (en) 2014-05-23 2018-04-17 Canon Kabushiki Kaisha Image forming apparatus
US10444668B2 (en) 2014-09-25 2019-10-15 Canon Kabushiki Kaisha Developing apparatus and image forming apparatus
US10845729B2 (en) 2018-02-07 2020-11-24 Canon Kabushiki Kaisha Image forming apparatus having toner density control

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US4891673A (en) * 1988-08-04 1990-01-02 Xerox Corporation Development system
US5548385A (en) * 1993-02-25 1996-08-20 Sharp Kabushiki Kaisha Developer device that gradually replaces degraded developer with fresh developer
US5430532A (en) * 1993-03-09 1995-07-04 Sharp Kabushiki Kaisha Developing device with a tilt detecting function designed for a trickle system
JP3472214B2 (en) 1999-11-11 2003-12-02 キヤノン株式会社 Image forming device
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