JPH05312718A - Cleaning device of detecting sensor detecting concentration of toner - Google Patents

Cleaning device of detecting sensor detecting concentration of toner

Info

Publication number
JPH05312718A
JPH05312718A JP14500892A JP14500892A JPH05312718A JP H05312718 A JPH05312718 A JP H05312718A JP 14500892 A JP14500892 A JP 14500892A JP 14500892 A JP14500892 A JP 14500892A JP H05312718 A JPH05312718 A JP H05312718A
Authority
JP
Japan
Prior art keywords
light
liquid flow
light emitting
cleaning
developer
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
Application number
JP14500892A
Other languages
Japanese (ja)
Inventor
Hiroshi Soga
浩史 曽我
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14500892A priority Critical patent/JPH05312718A/en
Publication of JPH05312718A publication Critical patent/JPH05312718A/en
Pending legal-status Critical Current

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  • Cleaning In Electrography (AREA)
  • Optical Measuring Cells (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

PURPOSE:To remove a foreign article even if the foreign article is adhered to a light, emitting element or a light detecting element by moving a cleaning member by means of the flow of a liquid between a light emitting surface of the light emitting element and a light detecting surface of the light detecting element to scrub the surfaces. CONSTITUTION:A cleaning member 34 is provided which is moved by means of a liquid flow 32 between a light emitting surface of a light emitting element 28 and a light detecting surface of a light detecting element 29 to scrub both surfaces. The member 34 is constituted of a wiper member 37 and a cleaning pad 38 so as to oscillate in a direction of the liquid flow 32. A liquid receiving plate 39 is fixed to the member 37, to which the liquid flow 32 collides at right angles. When a developer liquid is discharged from a developer liquid discharge nozzle 31 thereby to generate the liquid flow 32, the plate 39 is pushed by the developer liquid forming the liquid flow, and the member 37 is turned around a shaft 36. At this time, both pads 38 move while sliding in touch with the light emitting surface of the element 28 and the light detecting surface of the element 29. Therefore, foreign articles such as toners, paper dust or the like adhered to the surfaces are scraped and cleaned.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、光透過型のトナー濃度
検出センサのクリーニング装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a light transmission type toner concentration detecting sensor.

【0002】[0002]

【従来の技術】湿式電子複写装置などの画像形成装置で
は、現像液槽に貯留した現像液を汲み上げて、現像装置
に供給し、現像に供した現像液を、その現像液槽に戻す
ようにしている。又、現像液で、例えば感光体より成る
潜像担持体をクリーニングする方式の画像形成装置で
は、同じようにして、現像液槽からクリーニング装置に
向けて現像液を供給し、クリーニングに供した現像液を
現像液槽に戻すようにしている。
2. Description of the Related Art In an image forming apparatus such as a wet electronic copying machine, a developer stored in a developer tank is pumped up and supplied to a developing device, and the developer used for development is returned to the developer tank. ing. Further, in an image forming apparatus of a type in which a latent image carrier composed of a photoconductor is cleaned with a developing solution, the developing solution is supplied from the developing solution tank toward the cleaning device in the same manner, and the developing solution used for cleaning is developed. The solution is returned to the developer tank.

【0003】通常、この種の現像液槽内の現像液中には
トナー濃度検出センサが設けられているのであるが、こ
れにトナーなどが付着すると、その検出に支障を来たす
ようになる。かような点について、図4に示した画像形
成装置を一例に挙げて更に詳しく説明する。
Normally, a toner concentration detecting sensor is provided in the developing solution in this type of developing solution tank, but if toner or the like adheres to the sensor, the detection of the toner concentration will be hindered. Such points will be described in more detail by taking the image forming apparatus shown in FIG. 4 as an example.

【0004】先ず、この画像形成装置の構成について、
ある程度、詳しく述べるに、符号1は潜像担持体の一構
成例であるドラム状の感光体を示し、先ず、この感光体
の表面が帯電チャージャ2により一様に帯電される。こ
のあと、感光体1の表面の非画像領域の電荷がイレーサ
3により除去される。
First, regarding the structure of this image forming apparatus,
To be described in detail to some extent, reference numeral 1 indicates a drum-shaped photoconductor that is an example of the configuration of the latent image carrier. First, the surface of the photoconductor is uniformly charged by the charging charger 2. Thereafter, the eraser 3 removes the electric charge in the non-image area on the surface of the photoconductor 1.

【0005】当該画像形成装置100の上部には原稿自
動送り送置(ADF)4が設けられ、この装置によって
図示されない原稿がコンタクトガラス5上でセットされ
たとき、露光光学系6を介して原稿の光像が、露光部7
のところで、感光体1上に結像投影され、これにより、
原稿画像に対応した静電潜像が感光体1上に形成され
る。
An automatic document feeder (ADF) 4 is provided above the image forming apparatus 100. When an original document (not shown) is set on the contact glass 5 by this device, the original document is fed through the exposure optical system 6. The light image of the
At that point, an image is projected on the photoconductor 1, and
An electrostatic latent image corresponding to the original image is formed on the photoconductor 1.

【0006】感光体1に対置された現像装置8は、かよ
うにして形成された静電潜像を、現像液により、トナー
像として可視像化するものである。一方、給紙カセット
9、又はその他の給紙部(不図示)からは、記録媒体と
しての転写紙11がレジストローラ対12に向けて送ら
れる。そして、ここで、感光体1上のトナー像の先端部
と、転写紙の先端部とが好機に会合するように、タイミ
ングをとって転写紙が感光体1と、転写チャージャ13
との間に向けて更に送られる。
The developing device 8 opposed to the photosensitive member 1 visualizes the electrostatic latent image thus formed as a toner image with a developing solution. On the other hand, the transfer paper 11 as a recording medium is sent toward the registration roller pair 12 from the paper feed cassette 9 or another paper feed unit (not shown). Then, at this point, the transfer paper is in contact with the photoconductor 1 and the transfer charger 13 at a timing so that the front end of the toner image on the photoconductor 1 and the front end of the transfer paper meet with each other.
It is sent further to and between.

【0007】このようにして送られた転写紙11には、
転写チャージャ13の作用により、感光体1上のトナー
像が転写される。このあと、転写紙11は、感光体1上
から分離され、定着装置部14を通って画像形成装置外
に排出される。
On the transfer paper 11 thus sent,
By the action of the transfer charger 13, the toner image on the photoconductor 1 is transferred. After that, the transfer paper 11 is separated from the surface of the photoconductor 1, passes through the fixing device section 14, and is discharged to the outside of the image forming apparatus.

【0008】現像装置8の反対側において、感光体1に
対置されたクリーニング装置15は、トナー像の転写紙
への転写後に、クリーニング液を流し乍ら、感光体表面
に残留するトナーを除去し、該表面をクリーニングする
ものである。
On the opposite side of the developing device 8, a cleaning device 15 opposite to the photoconductor 1 removes the toner remaining on the surface of the photoconductor by flowing a cleaning liquid after the toner image is transferred onto the transfer paper. , To clean the surface.

【0009】図6に示す現像液槽16内には、母液(例
えば、商品名「アイソパー」)に、トナーを混ぜた現像
液17が貯留されている。この貯留される現像液中に
は、トナー濃度検出センサ18が設置されている。この
センサ18が、現像液のトナーの濃度の低下を検出する
と、トナーの含有率の高い高濃度の現像液が、現像液補
給容器19から補給される。
In the developer tank 16 shown in FIG. 6, a developer 17 in which toner is mixed with mother liquor (for example, trade name "ISOPER") is stored. A toner concentration detection sensor 18 is installed in the stored developer. When the sensor 18 detects a decrease in the toner concentration of the developer, a high concentration developer having a high toner content is replenished from the developer replenishing container 19.

【0010】そして、濃度の調整された現像液17は、
ポンプ20によって汲み上げられ、現像液供給管21を
介して、図5に示す現像装置8に導かれ、一対の現像ロ
ーラ22が接する感光体1上の部位を流動する。このと
き、流動する現像液中のトナーによって、先の静電潜像
がトナー像として可視像化される。次いで、流動する余
分な現像剤は、スクイズローラ23によって感光体1上
から絞り落とされ、現像液戻し管24を通って図6の現
像液槽16内に戻される。
Then, the developer 17 of which the concentration is adjusted is
It is pumped up by the pump 20, guided to the developing device 8 shown in FIG. 5 through the developing solution supply pipe 21, and flows through the portion on the photoconductor 1 where the pair of developing rollers 22 are in contact. At this time, the electrostatic latent image is visualized as a toner image by the toner in the flowing developing solution. Then, the excess developer flowing is squeezed from the surface of the photoconductor 1 by the squeeze roller 23 and returned to the developer tank 16 of FIG. 6 through the developer return tube 24.

【0011】又、現像液槽16内の現像液17は、図示
されないポンプによって汲み上げられ、供給管25(図
6では不図示)を介してクリーニング装置15に供給さ
れ、感光体1上の残留トナーを掻き落とすクリーニング
ブレード43やクリーニングローラ44などが接する感
光体の表面部を流動し、クリーニングに供される。この
ように、この例では現像液17がクリーニング液として
利用される。そして、このクリーニングに供された現像
液は、戻し管26を通して現像液槽16内に戻される。
Further, the developing solution 17 in the developing solution tank 16 is drawn up by a pump (not shown) and supplied to the cleaning device 15 via a supply pipe 25 (not shown in FIG. 6), and the residual toner on the photoconductor 1 is discharged. The cleaning blade 43 and the cleaning roller 44 for scraping off the toner flow on the surface of the photoconductor in contact therewith and are used for cleaning. Thus, in this example, the developing solution 17 is used as the cleaning solution. Then, the developer used for this cleaning is returned to the developer tank 16 through the return pipe 26.

【0012】現像液槽16内の現像液17の量が少なく
なると、これを検知したセンサの出力によって、図示し
ていない母液タンクから現像液槽16に母液が補給され
る。
When the amount of the developing solution 17 in the developing solution tank 16 becomes small, the mother solution is replenished from the unillustrated mother solution tank to the developing solution tank 16 by the output of the sensor which detects this.

【0013】トナー濃度検出センサ18は、図7に示す
ように、センサ筐体27の側に、発光素子28と、受光
素子29とを固設したものとなっている。発光素子28
は、例えば、発光ランプより成り、又、受光素子29
は、例えば、Cdsセルより成り、前者の発光面28A
(図8)と、後者の受光面29Bとが、例えば1mm以下
程度の僅少な隙間で、互いに向き合うように、両素子2
8,29が対置されている。このようなトナー濃度検出
センサは、光透過型の検出センサとも呼ばれている。
As shown in FIG. 7, the toner concentration detecting sensor 18 has a light emitting element 28 and a light receiving element 29 fixedly provided on the sensor housing 27 side. Light emitting element 28
Is, for example, a light emitting lamp, and the light receiving element 29
Is, for example, a Cds cell, and the former light emitting surface 28A
(FIG. 8) and the latter light receiving surface 29B face each other with a slight gap of, for example, about 1 mm or less.
8 and 29 are opposed to each other. Such a toner concentration detection sensor is also called a light transmission type detection sensor.

【0014】ここで、図6において、ポンプ20は、図
示されない駆動モータによって回転駆動されるようにな
っているのであるが、そのポンプ20は、いつも作動状
態にある訳ではなく、例えば、画像形成を行わない場合
は、止められている。いずれにしても、ポンプ20は、
回転したり、止められたりするのであるが、このうちの
回転作動時には、現像液吐出ノズル31より、現像液が
吐出する。すなわち、ポンプ22の作動によって、液流
32が発生し、これによって現像液17が撹拌されるの
である。
Here, in FIG. 6, the pump 20 is rotatably driven by a drive motor (not shown), but the pump 20 is not always in an operating state, and for example, image formation is performed. If you don't, you're stopped. In any case, the pump 20
Although it is rotated or stopped, the developing solution is discharged from the developing solution discharge nozzle 31 during the rotation operation. That is, the liquid flow 32 is generated by the operation of the pump 22, and the developer 17 is stirred by this.

【0015】これに対し、ポンプ20が止められると、
液流32は生じなくなる。いずれにしても、ノズル31
の出口側には間欠的に液流が発生し、このような液流の
方向に、トナー濃度検出センサ18が設置されている。
そして、前述した発光素子28と、受光素子29との間
を流れる現像液に対して、発光素子からの光を透過さ
せ、この透過した光を受光素子29で受けているのであ
る(図7)。
On the other hand, when the pump 20 is stopped,
The liquid flow 32 disappears. In any case, the nozzle 31
A liquid flow is intermittently generated on the outlet side of the toner concentration detection sensor 18 is installed in such a liquid flow direction.
Then, the light from the light emitting element is transmitted to the developer flowing between the light emitting element 28 and the light receiving element 29 described above, and the transmitted light is received by the light receiving element 29 (FIG. 7). ..

【0016】ところで、この種の画像形成装置では、現
像液槽16内の現像液17を、現像装置やクリーニング
装置の双方に供給し回収する循環方式を採用しているの
で、クリーニング装置より回収される現像液中には、転
写時に、感光体表面に付着する紙粉や、その他の塵埃な
どが混入している。又、現像装置より回収される現像液
中には、金属粉や、再分散不良によるトナーの凝集物な
どが存在している。これらの異物が、発光素子と受光素
子との間に、引っかかると、素子に付着し、この付着物
が成長してゆくと、図8に示すように、発光面28Aと
受光面29Bとの間の隙間が異物33で埋まってしま
い、現像液が、かかる隙間を流れなくなってしまう。
By the way, this type of image forming apparatus employs a circulation system in which the developing solution 17 in the developing solution tank 16 is supplied to and recovered by both the developing apparatus and the cleaning apparatus, so that it is recovered by the cleaning apparatus. During the transfer, the developing solution contains paper dust and other dust that adhere to the surface of the photoconductor. Further, in the developer collected by the developing device, there are metal powder and toner aggregates due to poor redispersion. When these foreign substances are caught between the light emitting element and the light receiving element, they adhere to the element, and when the adhered matter grows, as shown in FIG. 8, it is between the light emitting surface 28A and the light receiving surface 29B. The gap is filled with the foreign matter 33, and the developer does not flow through the gap.

【0017】更に、画像形成装置を移動させるようなと
きには、現像液を現像液槽から抜き出すのであるが、こ
の場合、現像液槽を長時間、放置すると、発光面と受光
面とにトナーが付着したまま乾燥し、固着状態となって
しまう。このような固着状態のままで、画像形成装置を
再稼動し、トナーの濃度検出を行ってしまうと、トナー
濃度検出センサは、検出時点における現像液に対して、
本来よりも、濃いトナー濃度のものであると、検出して
しまう。
Further, when the image forming apparatus is moved, the developing solution is taken out from the developing solution tank. In this case, if the developing solution tank is left for a long time, toner adheres to the light emitting surface and the light receiving surface. As it is dried, it becomes stuck. If the image forming apparatus is restarted and the toner concentration is detected in such a fixed state, the toner concentration detection sensor detects
If the toner density is higher than originally, it will be detected.

【0018】かような誤検知を生じると、補給すべき現
像液の量が少なくなり、この結果、得られる画像の濃度
が低くなってしまう。
If such an erroneous detection occurs, the amount of the developing solution to be replenished becomes small, and as a result, the density of the obtained image becomes low.

【0019】[0019]

【発明が解決しようとする課題】本発明の目的は、発光
素子や受光素子に異物が付着しても、これを除去できる
ようにして、トナー濃度の検出に支障を来たさないよう
にしたトナー濃度検出センサのクリーニング装置を提供
することにある。
SUMMARY OF THE INVENTION An object of the present invention is to prevent foreign matter from adhering to a light-emitting element or a light-receiving element even if it adheres to the light-emitting element or the light-receiving element so as not to interfere with toner concentration detection. It is to provide a cleaning device for a toner concentration detection sensor.

【0020】[0020]

【課題を解決するための手段】本発明は上記目的を達成
するため、現像液槽内に貯留される現像液中で、且つ、
間欠的に液流を生じる部位に設置され、互いに間を置い
て向き合うように対置された発光素子と受光素子とから
成る光透過型トナー濃度検出センサのクリーニング装置
であって、前記液流によって、発光素子の発光面と、受
光素子の受光面との間で、両面を摺擦するように移動す
る清掃部材を具備して成るトナー濃度検出センサのクリ
ーニング装置を提案するものである。
In order to achieve the above object, the present invention is in a developer stored in a developer tank, and
A cleaning device for a light-transmissive toner concentration detection sensor, which is installed at a portion where a liquid flow is generated intermittently and comprises a light-emitting element and a light-receiving element that are opposed to each other with a space between them, and a cleaning device for the toner concentration detection sensor, The present invention proposes a cleaning device for a toner concentration detection sensor, which is equipped with a cleaning member that moves between the light emitting surface of the light emitting element and the light receiving surface of the light receiving element so as to slide on both sides.

【0021】なお、清掃部材を、液流方向に揺動するワ
イパー部材と、このワイパー部材に固定され、液流によ
って押し動かされる液受け板とで構成すると、効果的で
ある。
It is effective to configure the cleaning member with a wiper member that swings in the liquid flow direction and a liquid receiving plate that is fixed to the wiper member and that is pushed by the liquid flow.

【0022】又、ワイパー部材の揺動時、ワイパー部材
が液流方向と直交する方向に動かぬように、該ワイパー
部材をガイド部材で支持させるようにすると、効果的で
ある。
Further, it is effective to support the wiper member by the guide member so that the wiper member does not move in the direction orthogonal to the liquid flow direction when the wiper member swings.

【0023】[0023]

【実施例】以下、本発明の実施例を図面に従って、詳細
に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0024】この実施例における画像形成装置の全体的
な構成と作用は、従来の技術において説明したところと
変りはないので、その説明は省略する。従来と異なると
ころは、トナー濃度検出センサのクリーニング装置が設
けられている点である。
The overall structure and operation of the image forming apparatus in this embodiment are the same as those described in the prior art, and the description thereof will be omitted. What is different from the conventional one is that a cleaning device for the toner concentration detection sensor is provided.

【0025】図1は、トナー濃度検出センサと、これに
組み合わせ構成される上述のクリーニング装置を示し、
このクリーニング装置は、液流32によって、発光素子
28の発光面28A(図2)と、受光素子29の受光面
29Bとの間で、両面を摺擦するように、移動する清掃
部材34を備えたものとなっている。
FIG. 1 shows a toner concentration detecting sensor and the above-mentioned cleaning device constructed in combination therewith,
This cleaning device includes a cleaning member 34 that moves by the liquid flow 32 between the light emitting surface 28A (FIG. 2) of the light emitting element 28 and the light receiving surface 29B of the light receiving element 29 so as to rub the both surfaces. It has become a thing.

【0026】清掃部材34は、液流32の方向に揺動し
得るように、センサ筐体27の内側のブラケット35
に、枢軸36によって枢着された鉤状を成すワイパー部
材37と、この両面のうち、枢軸36に近い両面部に貼
り付けられたクリーニングパッド38から成っている
(図2)。
The cleaning member 34 is mounted on a bracket 35 inside the sensor housing 27 so that the cleaning member 34 can swing in the direction of the liquid flow 32.
Further, it is composed of a hook-shaped wiper member 37 pivotally attached by a pivot 36 and a cleaning pad 38 attached to both sides of the both sides near the pivot 36 (FIG. 2).

【0027】ワイパー部材37には、液流32が真正面
で衝突するように、液受け板39が固定されている。図
1に示した液流32が生じていないときは、清掃部材3
4は、図3に示す破線位置(垂直位置)に置かれてい
る。そして、現像液吐出ノズル31から現像液が吐出
し、液流32を生じると、この液流を生じた現像液によ
って、液受け板39が押し動かされ、図3において破線
位置にあったワイパー部材37が枢軸36の周りに回動
して実線位置に置かれる。
A liquid receiving plate 39 is fixed to the wiper member 37 so that the liquid flow 32 may collide directly in front. When the liquid flow 32 shown in FIG. 1 is not generated, the cleaning member 3
4 is placed at the broken line position (vertical position) shown in FIG. When the developing solution is discharged from the developing solution discharge nozzle 31 and a liquid flow 32 is generated, the liquid receiving plate 39 is pushed by the developing solution that has generated this liquid flow, and the wiper member located at the position indicated by the broken line in FIG. 37 pivots about pivot 36 and is placed in a solid line position.

【0028】そして、液流が止まると、今度は、ワイパ
ー部材37は、この自重により、破線位置に戻る。いず
れにしても、清掃部材34は、破線位置と実線位置との
間を揺動し、この際、両パッド38,38(図2)は、
発光素子28の発光面と、受光素子29の受光面とに、
摺擦し乍ら移動し、両面に付着したトナーや紙粉などの
異物を拭き取り、清掃する。このような動作は、画像形
成工程(作像工程)に入るとき、又は、湿式画像形成装
置特有のプレクリーニング時に必ず行われ、この動作に
より、先の異物が除去されると同時に、発光面や受光面
の汚れが取り除かれる。
When the liquid flow is stopped, the wiper member 37 is returned to the broken line position due to its own weight. In any case, the cleaning member 34 swings between the broken line position and the solid line position, and at this time, both pads 38, 38 (FIG. 2) are
On the light emitting surface of the light emitting element 28 and the light receiving surface of the light receiving element 29,
Move by rubbing and rubbing to wipe off foreign matter such as toner and paper dust adhering to both sides. Such an operation is always performed at the time of entering the image forming step (image forming step) or at the time of pre-cleaning peculiar to the wet image forming apparatus. By this operation, the foreign matter is removed at the same time as the light emitting surface and The dirt on the light-receiving surface is removed.

【0029】発光素子の発光面や、受光素子の受光面
が、このようにして、常に清掃されるので、トナー濃度
の誤検知などを生じるおそれがなくなり、適正なトナー
濃度の現像液を現像装置に送ることができる。これによ
って濃度の低下しない画像を安定して得ることができる
のである。
Since the light-emitting surface of the light-emitting element and the light-receiving surface of the light-receiving element are constantly cleaned in this manner, there is no risk of erroneous detection of toner concentration, and a developing solution having a proper toner concentration is developed. Can be sent to. This makes it possible to stably obtain an image whose density does not decrease.

【0030】なお、クリーニングパッド38の材料とし
ては、両素子28,29を傷付けることのない材質、例
えば、不織布や、ナイロン等の毛ブラシ状のものなどの
使用が可能である。
As the material of the cleaning pad 38, it is possible to use a material which does not damage the elements 28 and 29, for example, a non-woven fabric or a bristle brush made of nylon or the like.

【0031】又、清掃部材34を戻し易くするために、
ワイパー部材37に重りや、バネなどを取り付けるよう
にしても良い。
Further, in order to make it easier to return the cleaning member 34,
A weight or a spring may be attached to the wiper member 37.

【0032】ところで、ワイパー部材37は枢軸36の
周りに揺動するようになっているのであるが、この揺動
時に、横ブレ(発光素子28の軸方向のフレ)を生じた
りすると、発光面と受光面との間の1mm程度の隙間を、
クリーニングパッド38が通過するとき、払拭圧が両面
において、ばらついてしまい、片方の面がきれいに清掃
されるも、他方の面の清掃が充分に行われなくなる場合
がある。
By the way, the wiper member 37 is designed to swing around the pivot 36. If, during this swing, lateral blurring (flame in the axial direction of the light emitting element 28) occurs, the light emitting surface is formed. And a gap of about 1mm between the light receiving surface and
When the cleaning pad 38 passes, the wiping pressure varies on both surfaces, and one surface may be cleaned cleanly, but the other surface may not be cleaned sufficiently.

【0033】このような場合には、ワイパー部材37の
揺動時に、この部材が液流32の方向と直交する方向
(発光素子29の軸方向)に動かぬように、該ワイパー
部材をガイド部材で支持させるようにすると良い。
In such a case, when the wiper member 37 is swung, the wiper member is guided so that the member does not move in the direction orthogonal to the direction of the liquid flow 32 (axial direction of the light emitting element 29). It is good to have it supported by.

【0034】図2において、ワイパー部材37には、段
付きのガイドピン41が固植され、この小径軸部は、ブ
ラケット35に設けた円弧状ガイド穴42(図3)に嵌
め込まれている。ガイドピン41が、かかるガイド穴4
2に沿って移動することで、ワイパー部材37の横ブレ
が防止され、発光面と受光面とを共に均等にきれいに清
掃することができるのである。ガイドピン41やガイド
穴42は、ガイド部材を構成することとなる。
In FIG. 2, a stepped guide pin 41 is fixedly implanted in the wiper member 37, and this small diameter shaft portion is fitted in an arcuate guide hole 42 (FIG. 3) provided in the bracket 35. The guide pin 41 has such a guide hole 4
By moving along the line 2, the lateral movement of the wiper member 37 is prevented, and both the light emitting surface and the light receiving surface can be uniformly cleaned. The guide pin 41 and the guide hole 42 form a guide member.

【0035】以上、現像液槽16内の現像液17を現像
装置8とクリーニング装置15の両者に供給する形式の
画像形成装置を示したが、現像液槽16の現像液17を
専ら現像装置8にだけ供給し、クリーニング装置には、
他の母液槽から母液を供給するように構成し、或いはこ
の母液槽から現像液槽16に母液を供給するように構成
した画像形成装置にも、本発明の適用が可能である。
The image forming apparatus of the type in which the developing solution 17 in the developing solution tank 16 is supplied to both the developing device 8 and the cleaning device 15 has been described above, but the developing solution 17 in the developing solution tank 16 is exclusively used for the developing device 8. Supply only to the cleaning device,
The present invention is also applicable to an image forming apparatus configured to supply the mother liquor from another mother liquor tank or to supply the mother liquor from the mother liquor tank to the developing solution tank 16.

【0036】なお、発光素子の発光面と、受光素子の受
光面を清掃する清掃部材の構成は、実開平1−1462
52号公報などにも開示されているが、ここに示された
構成においては、清掃部材を作動させるためにソレノイ
ドなどが必要であり、そのコストが高くなる欠点を免れ
ない。
The structure of the cleaning member for cleaning the light emitting surface of the light emitting element and the light receiving surface of the light receiving element is as follows.
As disclosed in Japanese Patent Publication No. 52, etc., in the configuration shown here, a solenoid or the like is required to operate the cleaning member, which inevitably has the drawback of high cost.

【0037】[0037]

【発明の効果】請求項1に記載の構成によれば、発光素
子や受光素子に付着した異物が清掃除去されるので、現
像液のトナー濃度の検出を支障なく継続して安定的に行
うことができる。又、清掃部材を揺動駆動する手段も不
要であり、この種のクリーニング装置の構成を簡素化す
ることができ、よりコンパクトで安価なクリーニング装
置を提供することができる。
According to the first aspect of the present invention, since the foreign matter adhering to the light emitting element and the light receiving element is removed by cleaning, the toner concentration of the developer can be detected continuously without any trouble. You can Further, no means for swinging the cleaning member is required, and the structure of this type of cleaning device can be simplified, and a more compact and inexpensive cleaning device can be provided.

【0038】請求項2に記載の構成によれば、ワイパー
部材を適確に揺動させることができ、発光素子や受光素
子のクリーニング効果を一段と高めることができる。
According to the second aspect of the invention, the wiper member can be properly swung, and the cleaning effect of the light emitting element and the light receiving element can be further enhanced.

【0039】請求項3に記載の構成によれば、発光素子
と受光素子との双方を、共に均等にきれいに清掃するこ
とができる。
According to the third aspect of the invention, both the light emitting element and the light receiving element can be uniformly cleaned.

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

【図1】本発明一実施例のクリーニング装置と、これを
組み合わせたトナー濃度検出センサとを示す斜視図であ
る。
FIG. 1 is a perspective view showing a cleaning device according to an embodiment of the present invention and a toner concentration detection sensor in which the cleaning device is combined.

【図2】同上クリーニング装置の要部構成図である。FIG. 2 is a main part configuration diagram of the same cleaning device.

【図3】液流によってワイパー部材が回動させられた状
態を示す図である。
FIG. 3 is a view showing a state in which a wiper member is rotated by a liquid flow.

【図4】トナー濃度検出センサのクリーニング装置を具
備する画像形成装置の一例を示す概略構成図である。
FIG. 4 is a schematic configuration diagram illustrating an example of an image forming apparatus including a cleaning device for a toner concentration detection sensor.

【図5】同上画像形成装置の感光体周りの構成図であ
る。
FIG. 5 is a configuration diagram around a photoconductor of the image forming apparatus.

【図6】現像液を収容する現像液槽の構成図である。FIG. 6 is a configuration diagram of a developer tank that contains a developer.

【図7】従来例の問題点を説明するためのトナー濃度検
出センサ周りの構成斜視図である。
FIG. 7 is a configuration perspective view around a toner concentration detection sensor for explaining the problems of the conventional example.

【図8】従来例の問題点を説明するための発光素子部と
受光素子との構成を示す図である。
FIG. 8 is a diagram showing a configuration of a light emitting element portion and a light receiving element for explaining the problems of the conventional example.

【符号の説明】[Explanation of symbols]

16 現像液槽 17 現像液 18 トナー濃度検出センサ 28 発光素子 29 受光素子 28A 発光面 29B 受光面 32 液流 34 清掃部材 37 ワイパー部材 39 液受け板 16 developer tank 17 developer 18 toner concentration detection sensor 28 light emitting element 29 light receiving element 28A light emitting surface 29B light receiving surface 32 liquid flow 34 cleaning member 37 wiper member 39 liquid receiving plate

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 現像液槽内に貯留される現像液中で、且
つ、間欠的に液流を生じる部位に設置され、互いに間を
置いて向き合うように対置された発光素子と受光素子と
から成る光透過型トナー濃度検出センサのクリーニング
装置であって、前記液流によって、発光素子の発光面
と、受光素子の受光面との間で、両面を摺擦するように
移動する清掃部材を具備して成るトナー濃度検出センサ
のクリーニング装置。
1. A light-emitting element and a light-receiving element, which are installed in a developer stored in a developer tank and at positions where an intermittent liquid flow is generated, and which are opposed to each other with a space therebetween. A cleaning device for a light-transmissive toner concentration detection sensor, comprising: a cleaning member that moves so as to slide between the light emitting surface of the light emitting element and the light receiving surface of the light receiving element by the liquid flow. Cleaning device for toner concentration detection sensor.
【請求項2】 清掃部材を、液流方向に揺動するワイパ
ー部材と、このワイパー部材に固定され、液流によって
押し動かされる液受け板とで構成した請求項1に記載の
トナー濃度検出センサのクリーニング装置。
2. The toner concentration detecting sensor according to claim 1, wherein the cleaning member includes a wiper member that swings in the liquid flow direction, and a liquid receiving plate that is fixed to the wiper member and is pushed by the liquid flow. Cleaning device.
【請求項3】 ワイパー部材の揺動時、ワイパー部材が
液流方向と直交する方向に動かぬように、該ワイパー部
材をガイド部材で支持させた請求項2に記載のトナー濃
度検出センサのクリーニング装置。
3. The toner concentration detection sensor cleaning according to claim 2, wherein the wiper member is supported by a guide member so that the wiper member does not move in a direction orthogonal to the liquid flow direction when the wiper member swings. apparatus.
JP14500892A 1992-05-12 1992-05-12 Cleaning device of detecting sensor detecting concentration of toner Pending JPH05312718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14500892A JPH05312718A (en) 1992-05-12 1992-05-12 Cleaning device of detecting sensor detecting concentration of toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14500892A JPH05312718A (en) 1992-05-12 1992-05-12 Cleaning device of detecting sensor detecting concentration of toner

Publications (1)

Publication Number Publication Date
JPH05312718A true JPH05312718A (en) 1993-11-22

Family

ID=15375317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14500892A Pending JPH05312718A (en) 1992-05-12 1992-05-12 Cleaning device of detecting sensor detecting concentration of toner

Country Status (1)

Country Link
JP (1) JPH05312718A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007248768A (en) * 2006-03-15 2007-09-27 Kyocera Mita Corp Device for measuring concentration of liquid developer
JP2014038270A (en) * 2012-08-20 2014-02-27 Ricoh Co Ltd Belt unit and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007248768A (en) * 2006-03-15 2007-09-27 Kyocera Mita Corp Device for measuring concentration of liquid developer
JP2014038270A (en) * 2012-08-20 2014-02-27 Ricoh Co Ltd Belt unit and image forming apparatus

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