JPS634177B2 - - Google Patents
Info
- Publication number
- JPS634177B2 JPS634177B2 JP54136714A JP13671479A JPS634177B2 JP S634177 B2 JPS634177 B2 JP S634177B2 JP 54136714 A JP54136714 A JP 54136714A JP 13671479 A JP13671479 A JP 13671479A JP S634177 B2 JPS634177 B2 JP S634177B2
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- air
- solvent
- developer
- cooling
- 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
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 description 17
- 238000000935 solvent evaporation Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Wet Developing In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、湿式電子写真装置における現像液の
蒸発防止装置、より詳しくは転写プロセスを経た
感光体上に残存する現像液の蒸発を阻止するため
の装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing evaporation of a developer in a wet electrophotographic apparatus, and more particularly to a device for preventing evaporation of a developer remaining on a photoreceptor after a transfer process.
湿式電子写真装置は、帯電、露光工程によつて
感光体上に形成した潜像をアイソバーなどの石油
類を溶剤とした現像液によつて現像する方式を採
るものであるため、現像の際感光体上に付着した
溶剤の一部は転写紙に吸着されて乾燥定着の際の
熱により蒸発し、残りの溶剤の一部はクリーニン
グ装置で除去されるまでに周囲の空気に触れて蒸
発し、機外に漏洩して大気中に拡散する。 Wet-type electrophotographic devices develop a latent image formed on a photoreceptor through a charging and exposure process using a developer using a petroleum-based solvent such as Isovar, so the photosensitive material is Some of the solvent adhering to the body is absorbed by the transfer paper and evaporated by the heat during drying and fixing, and some of the remaining solvent evaporates on contact with the surrounding air before being removed by the cleaning device. It leaks outside the aircraft and spreads into the atmosphere.
この蒸気は人体にとつて有害であるばかりでな
く、装置その他周囲を汚すことにもなるため、装
置内で発生する蒸気を捕集し除去するための提案
が過去に多くなされてきている。ところが、これ
らの提案の多くは発生した蒸気を捕集して凝縮除
去するといつたものであるため、冷却装置に費用
がかかるばかりでなく冷却のために多くの電力を
要する欠点を有していた。さらに、これらの提案
の多くは発生蒸気の捕集が比較的容易な転写部に
関するものに集中し、全蒸発量の30〜50％を占め
る感光体表面からの発生蒸気は依然野放しの状態
であるから、殊に近年の高速複写装置のように感
光体の周速が早くしかも機内で発生する熱量が大
きな装置のような場合には、感光体の回動によつ
て高温空気が撹拌される結果、感光体表面から発
生する蒸気も無視し得ないものとなつている。 This vapor is not only harmful to the human body, but also contaminates the equipment and its surroundings, so many proposals have been made in the past to collect and remove the vapor generated within the equipment. However, many of these proposals involve collecting and condensing the generated steam, which not only requires expensive cooling equipment but also has the drawback of requiring a large amount of electricity for cooling. . Furthermore, many of these proposals focus on transfer parts where it is relatively easy to collect generated vapor, and the vapor generated from the photoreceptor surface, which accounts for 30 to 50% of the total evaporation, is still left unchecked. Therefore, especially in devices such as recent high-speed copying machines, where the circumferential speed of the photoreceptor is fast and the amount of heat generated inside the machine is large, high-temperature air is agitated by the rotation of the photoreceptor. Also, the steam generated from the surface of the photoreceptor cannot be ignored.
本発明は、湿式電子写真装置が抱える溶剤の蒸
発、殊に感光体表面での溶剤の蒸発問題を解決せ
んとするもので、発生した蒸気への対策でなく、
蒸気の発生を阻止する対策を構じることにより、
装置価格の低減と動力費、溶剤の節減を可能とす
る新たな装置を提案するものである。 The present invention is intended to solve the problem of solvent evaporation, particularly on the surface of a photoreceptor, which wet-type electrophotographic apparatuses face, and is not intended as a countermeasure against the generated vapor.
By taking measures to prevent the generation of steam,
This project proposes a new device that makes it possible to reduce equipment costs, power costs, and solvent consumption.
以下、本発明の詳細を図面により説明する。 Hereinafter, the details of the present invention will be explained with reference to the drawings.
図面は本発明の一実施例を示しており、１は感
光体ドラム、２は帯電器、３は露光部、４は液体
現像器で、感光体表面に形成された潜像上に現像
槽４ａ内の現像液をポンプ４ｂで供給して現像す
るもの、５は表面の余剰現像液を除去するスクイ
ズローラ、６は転写帯電器、７は転写紙分離用ロ
ーラ、８，９はクリーニングローラとブレード、
１０は除電器であり、これらは周知の如く画像作
像プロセスの順序に従つて感光体ドラム１の周囲
に配設されている。 The drawings show an embodiment of the present invention, in which 1 is a photoreceptor drum, 2 is a charger, 3 is an exposure section, and 4 is a liquid developer, in which a developer tank 4a is applied to a latent image formed on the surface of the photoreceptor. 5 is a squeeze roller that removes excess developer from the surface, 6 is a transfer charger, 7 is a transfer paper separation roller, 8 and 9 are cleaning rollers and blades. ,
Reference numeral 10 denotes static eliminators, which are arranged around the photosensitive drum 1 in accordance with the order of the image forming process, as is well known.
しかして、本発明の特徴をなす溶剤蒸発防止装
置１１は、特に転写部とクリーニング部間に配設
され、この装置は数mmの間隙を設けて感光体表面
を覆う遮幣板１２と、転写部附近で上記した間隙
内に感光体ドラム１の周速度に近い速度で空気を
送り込む送風用フアン１３と、空気を冷却する熱
電冷却素子１４ａを用いた冷却器１４と、クリー
ニング部附近で感光体表面の気体を吸引して上記
した送風用フアン１３まで導びくダクト１５とか
ら構成されている。なお、図中符号１６は空気吹
出し口、１７は気体吸引口、１４ｂは熱電冷却素
子１４ａの放熱フイン、１４ｃは熱電冷却素子１
４ａの吸熱側に接した熱良導材からなる気体冷却
板、１８はダクト１５内を循環する気体の一部を
外部に放出するための分岐管、１９はこの分岐管
１８内に設けられた吸引用フアン、２０は上記し
た間隙内へ送り込む空気量を調節するための調整
弁をそれぞれ示している。 Therefore, the solvent evaporation prevention device 11, which is a feature of the present invention, is disposed especially between the transfer section and the cleaning section, and this device includes a barrier plate 12 that covers the surface of the photoreceptor with a gap of several mm, and a transfer A blower fan 13 that blows air into the above-mentioned gap near the cleaning section at a speed close to the circumferential speed of the photoconductor drum 1, a cooler 14 using a thermoelectric cooling element 14a that cools the air, and a photoconductor near the cleaning section. It is composed of a duct 15 that sucks gas on the surface and guides it to the above-mentioned blowing fan 13. In the figure, reference numeral 16 is an air outlet, 17 is a gas suction port, 14b is a heat dissipation fin of the thermoelectric cooling element 14a, and 14c is the thermoelectric cooling element 1.
A gas cooling plate made of a heat-conducting material in contact with the endothermic side of 4a, 18 a branch pipe for discharging a part of the gas circulating in the duct 15 to the outside, and 19 provided within this branch pipe 18. The suction fan 20 represents a regulating valve for adjusting the amount of air sent into the above-mentioned gap.
上述した実施例において、感光体上に形成され
た潜像は現像液により現像され、転写部において
転写紙に転写されることになるが、現像液中の溶
剤は転写紙に吸収される一部を除いて感光体表面
に残る。この溶剤を付着させた感光体表面が遮幣
板１２の下に入り込むと、熱電冷却素子１４ａに
よつて冷却され、感光体ドラム１の周速に近い速
度で送風フアン１３により送り込まれた空気と接
触することになつて、感光体表面に付着した溶剤
は蒸発が阻げられたままクリーニング部に運ば
れ、ここでクリーニングローラ８とブレード９に
よりほぼ全量が除去されることになる。他方、感
光体表面と相対速度のない状態で接触した空気
は、それでも吸引口１７に達するまでの間に温た
められてわずかに溶剤蒸気を含むようになるが、
この空気は閉ループをなすダクト１５に導かれて
再び冷却板１４ｃと接触し、冷却される間に溶剤
蒸気を放出するから、繰返しの使用によつても溶
剤蒸気の濃縮は起こらず、逆に冷却に要するエネ
ルギーの軽減が図れる。なお、このサイクル中、
吸引口１７から循環空気以外の空気も若干入り込
むが、余分な空気は吸引フアン１９に引かれて外
部に放出される。 In the embodiment described above, the latent image formed on the photoreceptor is developed with a developer and transferred to transfer paper at the transfer section, but some of the solvent in the developer is absorbed by the transfer paper. remains on the surface of the photoreceptor. When the surface of the photoreceptor to which the solvent is adhered enters under the billet plate 12, it is cooled by the thermoelectric cooling element 14a, and is combined with the air blown in by the blower fan 13 at a speed close to the circumferential speed of the photoreceptor drum 1. The solvent adhering to the surface of the photoreceptor due to contact with the photoreceptor is transported to the cleaning section while being prevented from evaporating, where almost the entire amount is removed by the cleaning roller 8 and blade 9. On the other hand, the air that comes into contact with the photoreceptor surface without relative velocity is still warmed and contains a slight amount of solvent vapor before reaching the suction port 17;
This air is led to the duct 15 forming a closed loop and comes into contact with the cooling plate 14c again, and releases solvent vapor while being cooled. Therefore, even with repeated use, concentration of the solvent vapor does not occur, and on the contrary, the air is cooled. The energy required for this can be reduced. Furthermore, during this cycle,
Although some air other than the circulating air enters through the suction port 17, the excess air is drawn by the suction fan 19 and discharged to the outside.
以上は本発明の一実施例についての説明であ
り、溶剤蒸発防止装置はここ以外に、現像部をク
リーニング部間の他の必要とする個所に配設する
ことができる。 The above is a description of one embodiment of the present invention, and the solvent evaporation prevention device can be provided at other required locations between the cleaning sections.
毎分20枚のA3サイズの複写を可能とする複写
機を用いて溶剤消費量についての実験をしたとこ
ろ、溶剤蒸発防止装置を施さない場合、室温27℃
の時340mg／A3、室温32℃で２時間連続運転後に
480mg／A3の溶剤が消費された。この装置を用い
て転写部とクリーニング装置間で露出した感光体
表面に３〜４mmの間隙を設けて遮幣板を施し、
CP1.4−71−10の熱電冷却素子（サーモモジユー
ル）１個を使用して０℃に冷却させた24〜30／
minの冷却空気を感光体ドラムの周速に近い速度
で上記の間隙に送り込んだところ、溶剤の消費量
は室温、運転時間に関係なく290mg／A3以下にな
つた。なお、この時の定着部での溶剤消費は240
mg／A3であつた。 When we conducted an experiment on solvent consumption using a copier that can make 20 A3 size copies per minute, we found that without a solvent evaporation prevention device, the room temperature was 27℃.
340mg/A3 after 2 hours of continuous operation at room temperature 32℃
480mg/A3 of solvent was consumed. Using this device, a barrier plate is applied to the surface of the photoconductor exposed between the transfer section and the cleaning device with a gap of 3 to 4 mm,
24 ~ 30 / cooled to 0℃ using one thermoelectric cooling element (thermo module) of CP1.4-71-10
When cooling air of min. was sent into the above gap at a speed close to the circumferential speed of the photoreceptor drum, the amount of solvent consumed was 290 mg/A3 or less regardless of room temperature and operating time. In addition, the solvent consumption in the fixing section at this time is 240
It was mg/A3.
以上述べたように本発明によれば、現像液が付
着した感光体表面に近接して遮幣部材を設け、こ
れらの間に感光体表面の移動速度に近い速度で冷
却空気を送り込み、感光体表面との間に可及的に
相対速度のない空気層を形成し、この空気により
感光体表面の現像液を冷却して溶剤の蒸発を阻止
するようにしたので、発生した溶剤蒸気を処理す
る従来装置に比較して冷却エネルギーの軽減、冷
却装置の小型化が図れるばかりでなく、クリーニ
ング部分における溶剤回収効率を向上させること
が可能となる。しかも、感光体表面と遮幣部材間
に送り込まれた空気は感光体移動方向において回
収し、これを循環再使用するようにしているた
め、空気の冷却に要するエネルギをさらに軽減で
きるとともに、溶剤蒸発を含む空気の外部への拡
散も阻止し得る優れた効果を奏する。 As described above, according to the present invention, a blocking member is provided close to the surface of the photoreceptor to which the developer has adhered, cooling air is sent between them at a speed close to the moving speed of the photoreceptor surface, and An air layer with as little relative velocity as possible is formed between the photoreceptor and the surface, and this air cools the developer on the surface of the photoreceptor and prevents the evaporation of the solvent, allowing the generated solvent vapor to be disposed of. Compared to conventional devices, not only can cooling energy be reduced and the cooling device be made smaller, but also the efficiency of solvent recovery in the cleaning section can be improved. In addition, the air sent between the photoreceptor surface and the barrier member is recovered in the direction of photoreceptor movement and reused for circulation, which further reduces the energy required to cool the air and allows solvent evaporation. This has an excellent effect of preventing air containing air from diffusing to the outside.
図面は本発明の一実施例を示す装置の構成図で
ある。
１……感光体ドラム、２……帯電器、４……液
体現像装置、６……転写帯電器、８……クリーニ
ングローラ、１１……溶剤蒸発防止装置、１２…
…遮幣板、１３……送風用フアン、１４……冷却
器、１４ａ……熱電冷却素子、１４ｂ……冷却フ
イン、１５……ダクト、１８……分岐管、１９…
…吸引フアン、２０……調整弁。
The drawing is a configuration diagram of an apparatus showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Charger, 4... Liquid developing device, 6... Transfer charger, 8... Cleaning roller, 11... Solvent evaporation prevention device, 12...
...Blaze plate, 13...Blower fan, 14...Cooler, 14a...Thermoelectric cooling element, 14b...Cooling fin, 15...Duct, 18...Branch pipe, 19...
...Suction fan, 20...Adjustment valve.
Claims (1)
像する方式の電子写真装置において、現像部とク
リーニング部を結ぶ領域の少くとも一部に、感光
体表面に近接してその面を覆う遮幣部材と、上記
表面の移動速度に近い速度で該表面と上記遮幣部
材間に空気を送り込む送風手段と、該空気を冷却
する手段と、感光体移動方向後方において送り込
まれた空気を回収し、これを上記送風、冷却手段
側に導びく部材を備えた湿式電子写真装置におけ
る現像液の蒸発防止装置。1. In an electrophotographic device that uses a developer to develop a latent image formed on the surface of a photoreceptor, a shield that is close to and covers the surface of the photoreceptor is provided in at least a part of the area connecting the developing section and the cleaning section. a member, a blowing means for sending air between the surface and the billet member at a speed close to the moving speed of the surface, a means for cooling the air, and recovering the air sent at the rear in the direction of movement of the photoreceptor; A device for preventing evaporation of developer in a wet electrophotographic apparatus, comprising a member for guiding developer to the blowing and cooling means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13671479A JPS5660475A (en) | 1979-10-22 | 1979-10-22 | Preventing device for evaporation of developer in wet electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13671479A JPS5660475A (en) | 1979-10-22 | 1979-10-22 | Preventing device for evaporation of developer in wet electrophotographic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5660475A JPS5660475A (en) | 1981-05-25 |
| JPS634177B2 true JPS634177B2 (en) | 1988-01-27 |
Family
ID=15181765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13671479A Granted JPS5660475A (en) | 1979-10-22 | 1979-10-22 | Preventing device for evaporation of developer in wet electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5660475A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5073796A (en) * | 1987-08-31 | 1991-12-17 | Kabushiki Kaisha Toshiba | Cooling system for an apparatus with a heat generating element therein |
| KR100297760B1 (en) * | 1998-03-24 | 2001-09-06 | 윤종용 | Device for collecting carrier of wet electronograph typed printer |
| JP4844996B2 (en) * | 2001-08-09 | 2011-12-28 | 桂川電機株式会社 | Exposure apparatus and image forming apparatus provided with exposure apparatus |
| KR20030069446A (en) * | 2002-02-20 | 2003-08-27 | 삼성전자주식회사 | OPC cleaning apparatus of liquid electrophotographic image forming device |
-
1979
- 1979-10-22 JP JP13671479A patent/JPS5660475A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5660475A (en) | 1981-05-25 |
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