JPS59111143A - Exposure device - Google Patents
Exposure deviceInfo
- Publication number
- JPS59111143A JPS59111143A JP22091882A JP22091882A JPS59111143A JP S59111143 A JPS59111143 A JP S59111143A JP 22091882 A JP22091882 A JP 22091882A JP 22091882 A JP22091882 A JP 22091882A JP S59111143 A JPS59111143 A JP S59111143A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting plate
- exposure
- plate
- reflecting
- reflector
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/54—Lamp housings; Illuminating means
- G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は原稿台移動型の電子写真複写機に用いる露光装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an exposure device used in an electrophotographic copying machine with a movable document table.
従来例の構成とその問題点
近年、電子写真複写機は、多機能化、小型化が進むにつ
れ新しい要素技術が必要とされるようになっている。Conventional Structures and Problems In recent years, as electrophotographic copying machines have become more multifunctional and more compact, new elemental technologies have become necessary.
以下、図面を参照しながら従来の電子写真複写機の露光
装置について説明する。第１図は従来の露光装置の構成
を示す概略断面図であり、１は露光ランプ、２は反射板
、３は原稿載置用のプラテンガラス板、４は原稿、５は
結像用のオプティカルファイバーレンズ、６は感光ドラ
ム、 ７． ８ｉｄ露光ランプ１から感光ドラム６への
光もれを防ぐ遮光板、９は露光用スリットである。なお
、矢印Ａｉｄ冷却のだめの気流を示している。Hereinafter, a conventional exposure device for an electrophotographic copying machine will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing the configuration of a conventional exposure apparatus, in which 1 is an exposure lamp, 2 is a reflector, 3 is a platen glass plate for placing an original, 4 is an original, and 5 is an optical for imaging. Fiber lens, 6 is photosensitive drum, 7. A light-shielding plate 9 is an exposure slit that prevents light from leaking from the 8id exposure lamp 1 to the photosensitive drum 6. Note that the arrow Aid indicates the airflow for cooling.
以上のように構成された従来の露光装置について、その
動作を以下に説明する。露光ランプ１がら照射された光
は、反射板２により反射および集光され、露光用スリッ
ト９．プラテンガラス板３を経て原稿４を照らし、２更
に露光用スリット９およびオプティカルファイバーレン
ズ５を経てｇ光ドラム６上に像を結ぶ。The operation of the conventional exposure apparatus configured as described above will be described below. The light emitted from the exposure lamp 1 is reflected and condensed by the reflection plate 2 and passes through the exposure slit 9. A document 4 is illuminated through a platen glass plate 3, and an image is formed on a g-light drum 6 through an exposure slit 9 and an optical fiber lens 5.
しかしながら上記のような構成においては反射板２が矢
印人で示す冷却のための気流の風路を遮′ぎるため、露
光う／プ１にょる導度上昇が著（−り、このため、オプ
ティカルファイバーレンズ５の温度が高くなって焦点ず
れ金主じたり、さらにはプラテンガラス板３が熱くなっ
たりする等の問題があった。However, in the above configuration, since the reflector plate 2 blocks the air path for cooling air indicated by the arrow, the conductivity due to the exposure plate 1 increases significantly (-, therefore, the optical There were problems such as the temperature of the fiber lens 5 becoming high, causing defocusing, and furthermore, the platen glass plate 3 becoming hot.
発明の目的
本発明の目的は、上述の従来の間頂点を解決し、露光系
の高効率冷却を可能とする露光装＃に提供することであ
る。OBJECTS OF THE INVENTION An object of the present invention is to provide an exposure system which solves the above-mentioned problems of the conventional art and enables highly efficient cooling of the exposure system.
発明の構成
本発明の露光装置は、露光用光源の光を、原稿面に集光
させるための反射板全第１の反射板と第２の反射板でも
って構成するとともに、それらの反射板の少くとも一方
を可動式とし、画像露光時は第１の反射板と第２の反射
板とを組合わせた状態として露光装置全冷却する気流が
反射板の周辺を流れるようにし、がっ、画像非露光時は
第１の反射板と第２の反射板とを分離した状態にして、
露光装置全冷却する気流が反射板の内部を流れるように
構成したものであり、これにより、反射板やレンズなど
の光源ランプによって熱せられた表壁温度や雰囲気温度
を効果的に降下させ得る装置となるものである。Structure of the Invention The exposure apparatus of the present invention includes a first reflecting plate and a second reflecting plate for condensing light from an exposure light source onto the surface of a document. At least one of them is movable, and during image exposure, the first reflector and the second reflector are combined so that the airflow that completely cools the exposure device flows around the reflector. When not exposed to light, the first reflecting plate and the second reflecting plate are kept separated,
Exposure equipment A device that is configured so that the airflow that cools the entire body flows through the interior of a reflector, which can effectively lower the surface wall temperature and ambient temperature that are heated by the light source lamp, such as the reflector or lens. This is the result.
実施例の説明
以下、本発明の実施例について図面を参照しながら説明
する。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第２図は本発明の一実施例に係る画像露光時の構成を示
す概略断面図である。第２図において、１は露光ランプ
、２ａは第１の反射板、２ｂは第２反射板、３に原稿載
置用のプラテンガラス板、４に原稿、６はオプティカル
ファイバーレンズ、６１−１：感光ドラム、７，８は露
光ランプ１がら感光ドラム６への光もれを防ぐ遮光板、
９は露光用スリット、１ｏは第２の反射板２ｂ全回動可
能に支承する支軸である。これにより、第２の反射板２
ｂは第１の反射板２ａに対して第２図のように組合わさ
れた（閉じた）第１位置と第３図のように分離された（
開いた）第２位置との間で回動しうるようになっている
。FIG. 2 is a schematic cross-sectional view showing a configuration during image exposure according to an embodiment of the present invention. In FIG. 2, 1 is an exposure lamp, 2a is a first reflecting plate, 2b is a second reflecting plate, 3 is a platen glass plate for placing an original, 4 is an original, 6 is an optical fiber lens, 61-1: The photosensitive drum 7 and 8 are light shielding plates that prevent light from leaking from the exposure lamp 1 to the photosensitive drum 6.
Reference numeral 9 represents an exposure slit, and reference numeral 1o represents a support shaft that supports the second reflecting plate 2b so as to be fully rotatable. As a result, the second reflecting plate 2
b with respect to the first reflecting plate 2a is the combined (closed) first position as shown in FIG. 2 and the separated position (as shown in FIG. 3).
It can be rotated between a second position (opened) and a second position.
以上のように構成された本実施例の露光装置について、
以下、その動作を説明する。まず、第２図の状態は露光
時であるため、第１の反射板２ａと第２の反射板２ｂは
閉じている。この場合、冷却用気流人の流れの方向は第
１図の従来例と同様である。Regarding the exposure apparatus of this embodiment configured as described above,
The operation will be explained below. First, since the state shown in FIG. 2 is during exposure, the first reflecting plate 2a and the second reflecting plate 2b are closed. In this case, the direction of the cooling air flow is the same as in the conventional example shown in FIG.
画像非露光時には、感光ドラムなどにセットしたセンサ
ーから信号を読み取り、第２の反射板２ｂを支軸１０を
中心に回動して第３図に示すように反射板の上方に位置
する遮光板７′＝１で移動する。すると、露光時に第２
の反射板２ｂと遮光板７との間を流れていた冷却用気流
が第２の反射板２ｂにより遮断され、代りに矢印Ａ′で
示すように第１の反射板２ａと第２の反射板２ｂの間を
通過するようになる。When the image is not exposed, a signal is read from a sensor set on a photosensitive drum, etc., and the second reflecting plate 2b is rotated around the support shaft 10 to move the second reflecting plate 2b to a position above the reflecting plate as shown in FIG. Move with 7'=1. Then, during exposure, the second
The cooling airflow that was flowing between the reflecting plate 2b and the light shielding plate 7 is blocked by the second reflecting plate 2b, and instead, as shown by arrow A', the cooling airflow flows between the first reflecting plate 2a and the second reflecting plate 7. 2b.
なお、上述の実施例は、第２の反射板２ｂの可動方法を
円運動としたが、円運動に限定されるものでなく、可動
するという機能を有するものであれば何でもよい。例え
ば平行移動なども用いることができる。In the above-described embodiment, the second reflecting plate 2b is moved in a circular motion, but the method is not limited to circular motion, and any movement may be used as long as it has a movable function. For example, parallel movement can also be used.
発明の効果
以上の説明から明らかなように、本発明は、露光装置の
反射板の一部もしくは全体を可動させる構成にしている
ので、冷却用気流を露光装置の内部に効果的に送ること
ができ、これにより冷却効率が増すという優れた効果が
得られる。そして、その効果により、レンズ系や感光ド
ラム、さらにはプラテンガラス板の温度上昇を回避でき
、画像の結像や感光体、トナー（磁性現像剤）の寿命の
点で多大の効果をもたらすものである。Effects of the Invention As is clear from the above description, the present invention has a structure in which part or all of the reflection plate of the exposure apparatus is movable, so that cooling airflow can be effectively sent into the interior of the exposure apparatus. This has the excellent effect of increasing cooling efficiency. As a result, it is possible to avoid temperature increases in the lens system, photosensitive drum, and glass platen, which has a significant effect on image formation and the lifespan of the photosensitive drum and toner (magnetic developer). be.
第１図は従来の電子写真複写機における露光装置の要部
概略断面図、第２図は本発明の一実施例の画像露光時の
要部概略断面図、第３図は同不発明の実施例における画
像非露光時の要部概略断面図である。
１・・・・・・露光ランプ、２’５２ｋ）・川・・反射
板、３・・・・・プラテンガラス板、４・・印・原稿、
６・・印・オプティカルファイバーレンズ、６・・・・
・・感光ドラム、了、８・・・・・・遮光板、１ｏ・・
・・・・支軸、Ａ・・・・・・冷却用気流。
第１図
３ ４ デ
第 ２ 区FIG. 1 is a schematic sectional view of the main part of an exposure device in a conventional electrophotographic copying machine, FIG. 2 is a schematic sectional view of the main part during image exposure in an embodiment of the present invention, and FIG. 3 is an embodiment of the same invention. FIG. 2 is a schematic cross-sectional view of a main part when an image is not exposed in an example. 1...Exposure lamp, 2'52k) River...Reflector, 3...Platen glass plate, 4...Mark/Original,
6...mark optical fiber lens, 6...
・・Photosensitive drum, end, 8・・・light shielding plate, 1o・・
...Spindle, A...Cooling airflow. Figure 1 3 4 2nd ward
Claims (1)
板と第２の反射板を具備し、かつ前記第１の反射板と第
２の反射板は、それらの少なくとも一方を露光装置冷却
用気流の通路において可動自在として、画像露光時は第
１の反射板と第２の反射板とが閉状態となって露光装置
冷却用の気流が反射板の周辺を流れ、画像非露光時は前
記第１の反射板と第２の反射板とが開状態となって露光
装置冷却用気流が反射板の内部を流れるように構成した
こと全特徴とする露光装置。A first reflecting plate and a second reflecting plate are provided for condensing light from an exposure light source onto a document surface, and the first reflecting plate and the second reflecting plate are configured to expose at least one of them. The first reflecting plate and the second reflecting plate are movable in the path of the device cooling airflow, and during image exposure, the first reflecting plate and the second reflecting plate are in a closed state, and the exposure device cooling airflow flows around the reflecting plate, so that the image is not exposed. The exposure apparatus is characterized in that when the first reflector plate and the second reflector plate are in an open state, an airflow for cooling the exposure apparatus flows through the interior of the reflector plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22091882A JPS59111143A (en) | 1982-12-15 | 1982-12-15 | Exposure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22091882A JPS59111143A (en) | 1982-12-15 | 1982-12-15 | Exposure device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59111143A true JPS59111143A (en) | 1984-06-27 |
| JPH031652B2 JPH031652B2 (en) | 1991-01-11 |
Family
ID=16758577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22091882A Granted JPS59111143A (en) | 1982-12-15 | 1982-12-15 | Exposure device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111143A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63128568U (en) * | 1987-02-13 | 1988-08-23 | ||
| WO1991006070A2 (en) * | 1989-10-10 | 1991-05-02 | Unisys Corporation | Electronic image lift |
-
1982
- 1982-12-15 JP JP22091882A patent/JPS59111143A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63128568U (en) * | 1987-02-13 | 1988-08-23 | ||
| WO1991006070A2 (en) * | 1989-10-10 | 1991-05-02 | Unisys Corporation | Electronic image lift |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH031652B2 (en) | 1991-01-11 |
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