JPH08335025A - Photoreceptor drum cooling device in printer using electrophotographic method - Google Patents
Photoreceptor drum cooling device in printer using electrophotographic methodInfo
- Publication number
- JPH08335025A JPH08335025A JP7143150A JP14315095A JPH08335025A JP H08335025 A JPH08335025 A JP H08335025A JP 7143150 A JP7143150 A JP 7143150A JP 14315095 A JP14315095 A JP 14315095A JP H08335025 A JPH08335025 A JP H08335025A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- photoreceptor drum
- cooling fan
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真方式を用いた
印刷装置における感光ドラムの冷却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 cooling device for a photosensitive drum in a printing device using an electrophotographic system.
【０００２】[0002]
【従来の技術】図２は電子写真方式を用いた印刷装置に
おける感光ドラム冷却装置の従来例を示したものであ
る。同図において、トナーホッパ９より補給されたトナ
ー２は、撹拌室１９において、現像剤４中のキャリア３
と混合し、キャリア３と共に搬送磁気ロール６により現
像磁気ロール７に運ばれ、レーザ発振機１２より発振し
たレーザ１３により形成された感光ドラム５上の静電潜
像を現像し、現像像は印刷用紙１４に転写される。ここ
で、ドクター板１０は現像磁気ロール７に運ばれる現像
剤４の量を規制し、スクレーパ１１は、感光ドラム５を
通過した現像剤４を掻き落す役割を果たしている。2. Description of the Related Art FIG. 2 shows a conventional example of a photosensitive drum cooling device in a printing device using an electrophotographic system. In the figure, the toner 2 replenished from the toner hopper 9 is the carrier 3 in the developer 4 in the stirring chamber 19.
Is mixed with the carrier 3 and conveyed to the developing magnetic roll 7 by the carrier magnetic roll 6 together with the carrier 3 to develop the electrostatic latent image on the photosensitive drum 5 formed by the laser 13 oscillated by the laser oscillator 12, and the developed image is printed. It is transferred to the sheet 14. Here, the doctor plate 10 regulates the amount of the developer 4 carried to the developing magnetic roll 7, and the scraper 11 plays a role of scraping off the developer 4 that has passed through the photosensitive drum 5.
【０００３】前記現像過程において、各ロールの駆動モ
ータより発生する熱、及び現像剤４の摩擦により発生す
る熱により、現像剤４及びこれと接する感光ドラム５の
温度が上昇する。感光ドラム５の表面温度上昇は、感光
ドラム表面の暗減衰低下により、画像に悪影響を与える
と共に、感光ドラム表面の軟化及び結晶化により、感光
ドラムの短寿命等の不具合を発生させる。又、現像剤温
度上昇は現像機内の現像剤４、トナー２の流動性を低下
させ、画像に悪影響を与える。During the developing process, the temperatures of the developer 4 and the photosensitive drum 5 in contact with the developer 4 rise due to the heat generated by the drive motor of each roll and the heat generated by the friction of the developer 4. The increase in the surface temperature of the photosensitive drum 5 adversely affects the image due to the decrease in the dark attenuation of the surface of the photosensitive drum, and the softening and crystallization of the surface of the photosensitive drum causes problems such as a short life of the photosensitive drum. Further, the rise in the developer temperature lowers the fluidity of the developer 4 and the toner 2 in the developing machine and adversely affects the image.
【０００４】この対策として、従来、図２に示すよう
に、熱の発生源である現像機のフレーム８の外側に、現
像機冷却ファン１５を設け、この冷却風で現像機フレー
ム８を冷却することにより、現像剤４の温度を低下さ
せ、間接的に、これと接する感光ドラム５の温度を低下
させる方式がとられてきた。As a countermeasure against this, conventionally, as shown in FIG. 2, a developing machine cooling fan 15 is provided outside the frame 8 of the developing machine which is a source of heat generation, and the developing machine frame 8 is cooled by this cooling air. As a result, the method of lowering the temperature of the developer 4 and indirectly lowering the temperature of the photosensitive drum 5 in contact therewith has been adopted.
【０００５】又、感光ドラムを直接冷却する方式とし
て、実開平４−５９８５０が知られている。この方式
は、図３に示すように、（−）帯電感光ドラム２０に対
向した帯電器１６からの放電時に発生するオゾンを吸引
する為のファン２１を利用して、帯電器１６の非放電時
にファン２１の風の流れを吸引から吹き出しに切替て、
ダクト２２より感光ドラム２０に冷却風を送り、感光ド
ラム２０の温度を低下させるものである。Also, as a method for directly cooling the photosensitive drum, there is known Japanese Utility Model Laid-Open No. 4-59850. In this method, as shown in FIG. 3, a fan 21 for sucking ozone generated during discharge from the charger 16 facing the (−) charging photosensitive drum 20 is used, and when the charger 16 is not discharged. Switch the air flow of the fan 21 from suction to blowout,
Cooling air is sent from the duct 22 to the photosensitive drum 20 to lower the temperature of the photosensitive drum 20.
【０００６】[0006]
【発明が解決しようとする課題】図２に示す従来の感光
ドラム冷却装置は、現像機フレームの外側からの冷却で
あるため、現像剤及び感光ドラムに対する冷却効率が悪
く、現像剤及び感光ドラムの温度を所定の温度にするた
めには、膨大な風量が必要であった。Since the conventional photosensitive drum cooling device shown in FIG. 2 is cooled from the outside of the developing machine frame, the cooling efficiency for the developer and the photosensitive drum is poor, and the developer and the photosensitive drum are not cooled. An enormous amount of air flow was required to bring the temperature to a predetermined temperature.
【０００７】又、図３に示す感光ドラム冷却装置は、送
風にダクトが不可欠であるため、圧力損失が大きいとい
う欠点に加え、冷却風吹き付けは放電時以外しか送風し
ないので、特に感光ドラムの回転速度の高い高速印刷機
においては、冷却効果は希少であった。Further, in the photosensitive drum cooling device shown in FIG. 3, since a duct is indispensable for blowing air, the pressure loss is large, and the cooling air blowing blows air only at the time of discharge. The cooling effect was rare in high-speed high-speed printing machines.
【０００８】[0008]
【課題を解決するための手段】上記問題点は、感光ドラ
ムとして（＋）帯電感光ドラムを使用すると共に、マシ
ンフレームに前記感光ドラム表面に対向させて外気を取
り入れる送風機構を設け、前記感光ドラム表面へ常時、
外気を吹き付けることにより、冷却効率が上がり、解決
される。The above problems are caused by using a (+) charged photosensitive drum as a photosensitive drum, and providing a machine frame with an air blowing mechanism which faces the surface of the photosensitive drum to take in outside air. Always on the surface
By blowing the outside air, the cooling efficiency is improved and solved.
【０００９】[0009]
【作用】上記のような感光ドラム冷却ファンは、感光ド
ラムに直接外気を吹き付けるため、感光ドラムの冷却効
果が大きく、現像機構の複雑な高画質機や、印刷用紙温
度の高い両面印刷機においても、感光ドラム表面の暗減
衰低下や結晶化を防ぎ、画質不具合や感光ドラム短寿命
を防止できる。Since the above-described photosensitive drum cooling fan blows the outside air directly onto the photosensitive drum, it has a great effect of cooling the photosensitive drum, and is suitable for a high-quality machine having a complicated developing mechanism and a double-sided printing machine having a high printing paper temperature. , It is possible to prevent deterioration of dark attenuation and crystallization on the surface of the photosensitive drum, and prevent image quality defects and short life of the photosensitive drum.
【００１０】又、現像剤と接する感光ドラムを冷却する
ことにより、間接的に現像剤温度も低下するため、従来
の現像機フレーム外側からの冷却と合わせ用いれば、現
像剤の流動性向上に資することができる。Further, since the temperature of the developer is indirectly lowered by cooling the photosensitive drum which is in contact with the developer, if it is used together with the cooling from the outside of the conventional developing machine frame, it contributes to the improvement of the fluidity of the developer. be able to.
【００１１】[0011]
【実施例】本発明の１実施例を図１に基づき説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG.
【００１２】同図は、電子写真方式を用いたレーザビー
ム式印刷装置の印写機構部を示すものである。本機構に
おいて、トナーホッパ９より補給されたトナー２は、撹
拌室１９において、現像剤４中のキャリア３と混合し、
キャリア３と共に搬送磁気ロール６により現像磁気ロー
ル７に運ばれ、レーザ発振機１２より発振したレーザ１
３により形成された（＋）帯電感光ドラム５上の静電潜
像を現像し、現像像は印刷用紙１４に転写される。本装
置においては、高画質化の為に、現像磁気ロール７は３
本使用されている。又、ドクター板１０は現像磁気ロー
ル７に運ばれる現像剤４の量を規制し、スクレーパ１１
は、（＋）帯電感光ドラム５を通過した現像剤４を掻き
落す役割を果たしている。FIG. 1 shows a printing mechanism portion of a laser beam type printing apparatus using an electrophotographic system. In this mechanism, the toner 2 replenished from the toner hopper 9 is mixed with the carrier 3 in the developer 4 in the stirring chamber 19,
The laser 1 is carried by the carrier magnetic roll 6 together with the carrier 3 to the developing magnetic roll 7 and oscillated by the laser oscillator 12.
The electrostatic latent image formed on the (+) charging photosensitive drum 5 formed by 3 is developed, and the developed image is transferred to the printing paper 14. In this apparatus, the developing magnetic roll 7 has three
The book has been used. Further, the doctor plate 10 regulates the amount of the developer 4 carried to the developing magnetic roll 7, and the scraper 11
Plays a role of scraping off the developer 4 that has passed through the (+) charging photosensitive drum 5.
【００１３】前記現像過程において、各ロールの駆動モ
ータより発生する熱、及び現像剤の摩擦により発生する
熱により、現像剤及びこれと接する感光ドラムの温度上
昇を防ぐために、マシンフレーム１に現像機冷却ファン
１５とドラム冷却ファン１７が取付けられている。ドラ
ム表面電位ホルダ１８は、ドラム表面電位測定機（図示
せず）を保持すると共に、ドラム冷却ファン１７からの
冷却風が現像機内に入るのを防いでいる。In the developing process, in order to prevent the temperature of the developer and the photosensitive drum in contact with the developer from rising due to the heat generated by the drive motor of each roll and the heat generated by the friction of the developer, the developing machine is mounted on the machine frame 1. A cooling fan 15 and a drum cooling fan 17 are attached. The drum surface potential holder 18 holds a drum surface potential measuring device (not shown) and also prevents cooling air from the drum cooling fan 17 from entering the developing device.
【００１４】本機構において、ドラム冷却ファン１７か
らの冷却風を、送風ダクト無しに、常時（＋）帯電感光
ドラム５に吹き付けることにより、感光ドラムの短寿命
化、及び、画質低下の原因となる感光ドラム表面温度上
昇を防止することができる。更に、従来からの現像機冷
却ファン１５と組み合わせることにより、画質低下の原
因となる現像剤温度上昇による現像剤の流動性低下を防
止することができる。In this mechanism, the cooling air from the drum cooling fan 17 is constantly blown to the (+) charged photosensitive drum 5 without a blower duct, which shortens the life of the photosensitive drum and deteriorates the image quality. It is possible to prevent the surface temperature of the photosensitive drum from rising. Further, by combining with the conventional developer cooling fan 15, it is possible to prevent the deterioration of the fluidity of the developer due to the temperature rise of the developer, which causes the deterioration of the image quality.
【００１５】[0015]
【発明の効果】本発明は感光ドラムとして（＋）帯電感
光ドラムを使用すると共に、マシンフレームに前記感光
ドラム表面に対向させて外気を取り入れる送風機構を設
け、前記感光ドラム表面へ常時、外気を吹き付けるよう
にしたので、従来、現像剤、トナーの飛散などの制限か
ら冷却効果を上げることの困難であった印写機構部の冷
却を効率良く行なうことができる。又、（＋）帯電感光
ドラムを使用したので、オゾン流出の懸念が少ないた
め、常時冷却が可能となる。According to the present invention, the (+) charged photosensitive drum is used as the photosensitive drum, and the machine frame is provided with the air blowing mechanism for taking in the outside air so as to face the surface of the photosensitive drum. Since the spraying is performed, it is possible to efficiently cool the printing mechanism portion, which has been difficult to enhance the cooling effect due to the limitation of the scattering of the developer and the toner. Further, since the (+) charging photosensitive drum is used, there is little concern that ozone will flow out, so that it is possible to always cool.
【００１６】この結果、画質向上のための現像磁気ロー
ル複数化、両面印刷における印刷用紙の高温化などのマ
シン機能向上に伴う印写機構部の熱量増加に対しても冷
却効果を大いに発揮できるため、マシン本体の機能向上
に際しての印写機構部の設計上の制約を取り除くことが
できる。As a result, the cooling effect can be greatly exerted even when the amount of heat of the printing mechanism is increased due to the improvement of the machine function such as the development magnetic rolls for improving the image quality and the temperature of the printing paper in the double-sided printing. It is possible to remove the restriction on the design of the printing mechanism unit when improving the function of the machine body.
【図１】本発明の電子写真方式を用いた印刷装置におけ
る感光ドラム冷却装置の１実施例を示す側断面図であ
る。FIG. 1 is a side sectional view showing an embodiment of a photosensitive drum cooling device in an electrophotographic printing device of the present invention.
【図２】電子写真方式を用いた印刷装置における感光ド
ラム冷却装置の従来例を示す側断面図である。FIG. 2 is a side sectional view showing a conventional example of a photosensitive drum cooling device in a printing device using an electrophotographic method.
【図３】電子写真方式を用いた印刷装置における感光ド
ラム冷却装置の他の従来例を示す側断面図である。FIG. 3 is a side cross-sectional view showing another conventional example of the photosensitive drum cooling device in the electrophotographic printing device.
１はマシンフレーム、５は感光ドラム、１７は送風機構
である。Reference numeral 1 is a machine frame, 5 is a photosensitive drum, and 17 is a blowing mechanism.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中嶋 勇夫 茨城県ひたちなか市武田1060番地 日立工 機株式会社内 (72)発明者 上野 浩 茨城県ひたちなか市武田1060番地 日立工 機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Nakajima 1060 Takeda, Hitachinaka City, Hitachi, Ibaraki Hitachi Koki Co., Ltd. (72) Hiroshi Ueno 1060 Takeda, Hitachinaka, Ibaraki Hitachi, Ltd.
Claims (1)
感光ドラムとして（＋）帯電感光ドラムを使用すると共
に、マシンフレームに前記感光ドラム表面に対向させて
外気を取り入れる送風機構を設け、前記感光ドラム表面
へ常時、外気を吹き付けることを特徴とする感光ドラム
冷却装置。1. A printer using an electrophotographic method,
A (+) charged photosensitive drum is used as the photosensitive drum, and a blower mechanism is provided in the machine frame so as to face the surface of the photosensitive drum to take in outside air, and the outside air is constantly blown onto the surface of the photosensitive drum. Cooling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7143150A JPH08335025A (en) | 1995-06-09 | 1995-06-09 | Photoreceptor drum cooling device in printer using electrophotographic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7143150A JPH08335025A (en) | 1995-06-09 | 1995-06-09 | Photoreceptor drum cooling device in printer using electrophotographic method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08335025A true JPH08335025A (en) | 1996-12-17 |
Family
ID=15332096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7143150A Pending JPH08335025A (en) | 1995-06-09 | 1995-06-09 | Photoreceptor drum cooling device in printer using electrophotographic method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08335025A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1152302A2 (en) | 2000-05-01 | 2001-11-07 | Xerox Corporation | Humidity control in a copying device |
| JP2014102332A (en) * | 2012-11-19 | 2014-06-05 | Kyocera Document Solutions Inc | Image forming apparatus |
| JP2015072502A (en) * | 2015-01-21 | 2015-04-16 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
-
1995
- 1995-06-09 JP JP7143150A patent/JPH08335025A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1152302A2 (en) | 2000-05-01 | 2001-11-07 | Xerox Corporation | Humidity control in a copying device |
| EP1152302A3 (en) * | 2000-05-01 | 2003-06-04 | Xerox Corporation | Humidity control in a copying device |
| US6621554B1 (en) | 2000-05-01 | 2003-09-16 | Xerox Corporation | Method and apparatus for controlling humidity in a copying device |
| US6894761B2 (en) | 2000-05-01 | 2005-05-17 | Xerox Corporation | Method and apparatus for controlling humidity in a copying device |
| JP2014102332A (en) * | 2012-11-19 | 2014-06-05 | Kyocera Document Solutions Inc | Image forming apparatus |
| US9122243B2 (en) | 2012-11-19 | 2015-09-01 | Kyocera Document Solutions Inc. | Image forming apparatus |
| JP2015072502A (en) * | 2015-01-21 | 2015-04-16 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
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