JPH031652B2 - - Google Patents
Info
- Publication number
- JPH031652B2 JPH031652B2 JP22091882A JP22091882A JPH031652B2 JP H031652 B2 JPH031652 B2 JP H031652B2 JP 22091882 A JP22091882 A JP 22091882A JP 22091882 A JP22091882 A JP 22091882A JP H031652 B2 JPH031652 B2 JP H031652B2
- Authority
- JP
- Japan
- Prior art keywords
- reflecting plate
- exposure
- plate
- cooling
- airflow
- 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
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)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
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 Industrial Application The present invention relates to an exposure device used in an electrophotographic copying machine with a moving 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
なつている。Conventional Structure 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は結像用のオプテイカ
ルフアイバーレンズ、６は感光ドラム、７，８は
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は露光用スリツトである。なお、矢印
Ａは冷却のた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 reflection plate, 3 is a platen glass plate for placing an original, 4 is an original, and 5 is an optical system for imaging. 6 is a photosensitive drum; 7 and 8 are light shielding plates for preventing light from leaking from the exposure lamp 1 to the photosensitive drum 6; and 9 is an exposure slit. Note that arrow A indicates an 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か
ら照射された光は、反射板２により反射および集
光され、露光用スリツト９、プラテンガラス板３
を経て原稿４を照らし、更に露光用スリツト９お
よびオプテイカルフアイバーレンズ５を経て感光
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 is passed through the exposure slit 9 and the platen glass plate 3.
It illuminates the original 4 through the exposure slit 9 and the optical fiber lens 5, and forms an image on the photosensitive drum 6.
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Ａで示す冷却のための気流の風路を遮
ぎるため、露光ランプ１による温度上昇が著し
く、このため、オプテイカルフアイバーレンズ５
の温度が高くなつて焦点ずれを生じたり、さらに
はプラテンガラス板３が熱くなつたりする等の問
題があつた。 However, in the above configuration, since the reflector plate 2 blocks the air path for cooling shown by the arrow A, the temperature rise due to the exposure lamp 1 is significant, and therefore the optical fiber lens 5
There were problems such as an increase in the temperature of the lens, causing defocus, and furthermore, the platen glass plate 3 becoming hot.
発明の目的
本発明の目的は、上述の従来の問題点を解決
し、露光系の高効率冷却を可能とする露光装置を
提供することである。OBJECTS OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide an exposure apparatus that enables highly efficient cooling of an 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を第１の反射板と第
２の反射板でもつ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
態として露光装置を冷却する気流が反射板の周辺
を流れるようにし、かつ、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、
露光装置を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つて熱せられた表
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 document surface. At least one of them is movable, and during image exposure, the first reflecting plate and the second reflecting plate are combined so that airflow for cooling the exposure device flows around the reflecting plate, and the image is not exposed. During exposure, the first reflecting plate and the second reflecting plate are separated,
It is configured so that the airflow that cools the exposure equipment flows inside the reflector, which effectively lowers the surface wall temperature and ambient temperature heated by the light source lamp, such as the reflector and lens. It is a device that can be used to obtain
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は原稿載置用のプラテンガラス板、
４は原稿、５はオプテイカルフアイバーレンズ、
６は感光ドラム、７，８は露光ランプ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
リツト、１０は第２の反射板２ｂを回動可能に支
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
るようになつている。 FIG. 2 is a schematic cross-sectional view showing a configuration during image exposure according to an embodiment of the present invention. In Figure 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 the original, 5 is the optical fiber lens,
6 is a photosensitive drum, 7 and 8 are light shielding plates that prevent light from leaking from the exposure lamp 1 to the photosensitive drum 6, 9 is an exposure slit, and 10 is a support shaft that rotatably supports the second reflecting plate 2b. be. As a result, the second reflecting plate 2
b rotates with respect to the first reflecting plate 2a between the combined (closed) first position as shown in Figure 2 and the separated (open) second position as shown in Figure 3. I'm getting used to it.
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Ａの流れの方向は第１図の従来例と同様
である。 The operation of the exposure apparatus of this embodiment configured as described above will be described below. First, the second
Since the state shown in the figure is during exposure, the first reflecting plate 2a
and the second reflecting plate 2b is closed. In this case, the direction of flow of the cooling airflow A 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ツトし
たセンサーから信号を読み取り、第２の反射板２
ｂ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まで移動す
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 2
b is rotated about the support shaft 10 and moved to the light shielding plate 7 located above the reflection plate as shown in FIG. Then, the cooling airflow that was flowing between the second reflecting plate 2b and the light shielding plate 7 during exposure is blocked by the second reflecting plate 2b, and instead, as shown by arrow A', the cooling airflow flows between the second reflecting plate 2b and the light shielding plate 7. and the second reflecting plate 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 configuration 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. and,
This effect makes it possible to avoid temperature increases in the lens system, the photosensitive drum, and even the platen glass plate, and has great effects in terms of image formation and the lifespan of the photosensitive member and toner (magnetic developer).
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図は同本発
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、２ａ，２ｂ……反射板、３
……プラテンガラス板、４……原稿、５……オプ
テイカルフアイバーレンズ、６……感光ドラム、
７，８……遮光板、１０……支軸、Ａ……冷却用
気流。
FIG. 1 is a schematic sectional view of the main parts of an exposure device in a conventional electrophotographic copying machine, FIG. 2 is a schematic sectional view of the main parts 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, 2a, 2b...Reflector, 3
... platen glass plate, 4 ... original, 5 ... optical fiber lens, 6 ... photosensitive drum,
7, 8... Light shielding plate, 10... Support shaft, A... Cooling air flow.
Claims (1)
第１の反射板と第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つ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つて露
光装置冷却用気流が反射板の内部を流れるように
構成したことを特徴とする露光装置。1 A first reflecting plate and a second reflecting plate are provided for converging light from an exposure light source onto the document surface, and the first reflecting plate and the second reflecting plate are arranged such that at least one of them is The first reflector plate and the second reflector plate are movable in the exposure device cooling air flow path during image exposure.
When the reflecting plate is in a closed state, an airflow for cooling the exposure device flows around the reflecting plate, and when an image is not exposed, the first reflecting plate and the second reflecting plate are in an open state, and the exposure device is cooled. An exposure apparatus characterized in that a cooling airflow is configured to flow inside a reflecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57220918A JPS59111143A (en) | 1982-12-15 | 1982-12-15 | exposure equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57220918A JPS59111143A (en) | 1982-12-15 | 1982-12-15 | exposure equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59111143A JPS59111143A (en) | 1984-06-27 |
| JPH031652B2 true JPH031652B2 (en) | 1991-01-11 |
Family
ID=16758577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57220918A Granted JPS59111143A (en) | 1982-12-15 | 1982-12-15 | exposure equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111143A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0641255Y2 (en) * | 1987-02-13 | 1994-10-26 | 桂川電機株式会社 | Optical device in copier |
-
1982
- 1982-12-15 JP JP57220918A patent/JPS59111143A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59111143A (en) | 1984-06-27 |
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