JPS6342786B2 - - Google Patents
Info
- Publication number
- JPS6342786B2 JPS6342786B2 JP15692780A JP15692780A JPS6342786B2 JP S6342786 B2 JPS6342786 B2 JP S6342786B2 JP 15692780 A JP15692780 A JP 15692780A JP 15692780 A JP15692780 A JP 15692780A JP S6342786 B2 JPS6342786 B2 JP S6342786B2
- Authority
- JP
- Japan
- Prior art keywords
- document table
- reflection plate
- document
- protrusion
- photoreceptor
- 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 20
- 230000003068 static effect Effects 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- G03G21/06—Eliminating residual charges from a reusable imaging member
- G03G21/08—Eliminating residual charges from a reusable imaging member using optical radiation
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は原稿台移動スリツト露光型複写機にお
ける電子写真感光体の除電装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a static eliminator for an electrophotographic photoreceptor in an exposure type copying machine with a moving slit document table.
従来のこの種の除電装置は除電用ランプを用い
るが、露光用ランプの光を像露光とは別の光路を
使つて感光体に照射して除電を行なつており、構
造が複雑で製作費も高価になつていた。 Conventional static eliminators of this type use a static elimination lamp, but the static elimination is performed by irradiating light from the exposure lamp onto the photoreceptor using an optical path different from that for image exposure, resulting in a complex structure and high production costs. It was also becoming more expensive.
本発明は上記の事情に鑑みなされたものであつ
て、その目的とするところは原稿の投影像と感光
体上に作像する結像手段との間の光路を原稿の露
光投影時以外の場合に反射板で遮り、この反射板
により反射された光を感光体の表面に照射して感
光体の結像以前及び以後の不必要な電荷を除去す
るようにして従来の除電に必要であつたACコロ
トロン、除電ランプ等をなくし構成を簡単化し製
作費を安価にすることにある。 The present invention has been made in view of the above-mentioned circumstances, and its purpose is to change the optical path between the projected image of the original and the image forming means that forms the image on the photoreceptor when the original is not exposed and projected. This method was necessary for conventional charge removal by blocking the light with a reflector and irradiating the surface of the photoreceptor with the light reflected by the reflector to remove unnecessary charges before and after image formation on the photoreceptor. The purpose is to simplify the configuration by eliminating the AC corotron, static elimination lamp, etc., and to reduce the manufacturing cost.
以下、本発明を図面を参照して説明する。 Hereinafter, the present invention will be explained with reference to the drawings.
図面中１は感光体、２は帯電装置、３は露光装
置、４は現像装置、５は定着装置、６は用紙供給
装置、７は移動可能な原稿台である。 In the drawing, 1 is a photoreceptor, 2 is a charging device, 3 is an exposure device, 4 is a developing device, 5 is a fixing device, 6 is a paper supply device, and 7 is a movable document table.
前記露光装置３は第２図に示すようにホルダ８
を備えていて、このホルダ８には露光ランプ９，
９′が装着してある。またホルダ８には原稿１０
の投影光を感光体１上に作像する集束性光伝送体
１１が設けてある。 The exposure device 3 has a holder 8 as shown in FIG.
The holder 8 includes an exposure lamp 9,
9' is installed. Also, the original 10 is in the holder 8.
A converging light transmitting body 11 is provided for forming an image on the photoreceptor 1 with the projected light.
ホルダ８の上部にはガイド板１２が設けてあ
り、このガイド板１２にはスリツト部１３が形成
してある。 A guide plate 12 is provided on the upper part of the holder 8, and a slit portion 13 is formed in this guide plate 12.
ガイド板１２上には原稿台７の移動方向と同一
方向に移動可能に反射板１４が設けてある。 A reflecting plate 14 is provided on the guide plate 12 so as to be movable in the same direction as the moving direction of the document table 7.
この反射板１４の右端部には突起部１５が形成
してあり、また原稿台７の両側下部には移動時前
記突起部１５に干渉する突起１６，１７が設けて
ある。 A protrusion 15 is formed at the right end of the reflecting plate 14, and protrusions 16 and 17 are provided at the lower portions of both sides of the document table 7 to interfere with the protrusion 15 during movement.
しかして、感光体１の表面は帯電装置２によつ
てに帯電され露光装置３により照射された原稿
１０からの投影光によつて原稿１０の文字、図形
等の情報部分と対応した部分以外の帯電が消去
される。その後にバイアス電圧を印加した現像
装置４によりに帯電された正極帯電トナーが前
記情報部分と対応した部分（画像部）に吸着現像
される。 Thus, the surface of the photoreceptor 1 is charged by the charging device 2, and by the projected light from the document 10 irradiated by the exposure device 3, the surface of the photoconductor 1 is charged with a charge by the charging device 2, and by the projection light from the document 10 irradiated by the exposure device 3, the surface of the photoconductor 1 is charged, and the portions of the document 10 other than those corresponding to the information portions such as characters and figures are removed. Electric charge is erased. Thereafter, the positively charged toner charged by the developing device 4 to which a bias voltage is applied is adsorbed and developed on a portion (image portion) corresponding to the information portion.
しかし、感光体１の表面には感光体１の結像以
前および以後に不必要な電荷が生じる。 However, unnecessary charges are generated on the surface of the photoreceptor 1 before and after image formation on the photoreceptor 1.
露光時においては第２図に示すように反射板１
４がスリツト部１３からはずれた場所に位置して
おり、原稿台７が第２図に矢印で示す方向（左方
向）に移動し露光が終了した直後原稿台７の一方
の突起１６が反射板１４の突起部１５に干渉して
この反射板１４を左方向に移動して反射板１４で
スリツト部１３を塞ぐ（第３図参照）。 During exposure, as shown in Figure 2, the reflector 1
4 is located away from the slit portion 13, and immediately after the document table 7 moves in the direction shown by the arrow in FIG. The reflecting plate 14 is moved to the left by interfering with the protruding portion 15 of the reflecting plate 14, and the slit portion 13 is closed with the reflecting plate 14 (see FIG. 3).
したがつて、露光ランプ９，９′の光が反射板
１４に当り、反射されて集束性光伝送体１１を通
して感光体１の表面を照射し除電する（第４図参
照）。 Therefore, the light from the exposure lamps 9, 9' hits the reflecting plate 14, is reflected, and irradiates the surface of the photoreceptor 1 through the convergent light transmitter 11, thereby eliminating static electricity (see FIG. 4).
前記原稿台７が元の位置にもどる間反射板１４
はスリツト部１３を塞いでいる。 While the document table 7 returns to its original position, the reflection plate 14
closes the slit portion 13.
感光体１は１コピーサイクルに複数回回転する
ので反射板１４がスリツト部１３を塞いでいる間
に数回にわたり感光体１の表面の除電はなされ
る。 Since the photoreceptor 1 rotates multiple times in one copy cycle, static electricity is removed from the surface of the photoreceptor 1 several times while the reflection plate 14 closes the slit portion 13.
次の複写のために原稿台７が複写開始位置まで
もどりきつた時、原稿台７の他方の突起１７が反
射板１４の突起部１５に干渉してこの反射板１４
を右方向に移動して反射板１４をスリツト部１３
より外す（第５図参照）。 When the document table 7 returns to the copy start position for the next copy, the other protrusion 17 of the document table 7 interferes with the protrusion 15 of the reflection plate 14, causing the reflection plate 14 to
to the right and move the reflector 14 to the slit part 13.
(See Figure 5).
本発明は以上詳述したように、原稿１０の投影
像と感光体１上に作像する結像手段との間の光路
を原稿の露光投影時以外の場合に反射板１４で遮
り反射板１４により反射された光を感光体１の表
面に照射することにより感光体１の結像以前及び
以後の不必要な電荷を除去することができる。 As described in detail above, the present invention blocks the optical path between the projected image of the original 10 and the imaging means for forming an image on the photoreceptor 1 with the reflecting plate 14 when the original is not being exposed and projected. By irradiating the surface of the photoreceptor 1 with the light reflected by the photoreceptor 1, unnecessary charges before and after image formation on the photoreceptor 1 can be removed.
このために従来除電に必要であつたACコロト
ロン、除電ランプ等が不必要になつて構成が簡単
になるし製作費も安価になる。 This eliminates the need for the AC corotron, static elimination lamp, etc. that were conventionally required for static elimination, simplifying the configuration and reducing manufacturing costs.
しかも、反射板１４の移動は、当該反射板１４
に設けた突起部１５が往復移動する原稿台７に設
けた突起１６，１７に係合することにより行なわ
れるものであるから、原稿の露光投影時に反射板
１４が原稿台７と結像手段との間の光路を塞いだ
りすることがなく、動作が確実となる利点もあ
る。 Moreover, the movement of the reflecting plate 14 is
This is done by engaging the protrusions 15 provided on the document table 7 with the protrusions 16 and 17 provided on the document table 7 that moves back and forth, so that the reflection plate 14 is connected to the document table 7 and the imaging means when exposing and projecting the document. It also has the advantage of ensuring reliable operation without blocking the optical path between the two.
第１図は本発明一実施例の除電装置を備えた複
写機の構成説明図、第２図は本発明一実施例の除
電装置を組込んだ露光装置の構成説明図、第３図
乃至第５図は本発明一実施例の除電装置の作用説
明図である。
１は感光体、７は原稿台、１４は反射板。
FIG. 1 is an explanatory diagram of the configuration of a copying machine equipped with a static eliminator according to an embodiment of the present invention, FIG. FIG. 5 is an explanatory diagram of the operation of the static eliminator according to one embodiment of the present invention. 1 is a photoreceptor, 7 is an original table, and 14 is a reflector.
Claims (1)
原稿の投影像を感光体１上に作像する結像手段と
を有する原稿台移動スリツト露光型複写機におい
て、 前記原稿台７と前記結像手段との間に、前記原
稿台７の移動方向と同一方向へ移動可能な反射板
１４を設け、 該反射板１４の一端部に突起部１５を形成する
と共に、前記原稿台７における移動方向の両側下
部に前記反射板１４の突起部１５にそれぞれ係合
する突起１６，１７をそれぞれ設け、 前記原稿台７の往動時であつて原稿露光が終了
した直後、前記原稿台７の一方の突起１６が前記
反射板１４の突起部１５と係合して、反射板１４
が前記原稿台７と前記結像手段との間の光路を塞
ぐように、前記反射板１４を一方向へ移動させ、
また、前記原稿台７の復動時であつて、原稿台７
が複写開始位置まで戻つた時、前記原稿台７の他
方の突起１７が前記反射板１４の突起部１５に係
合して、反射板１４が前記原稿台７と前記結像手
段との間の光路から外れるように、前記反射板１
４を他方向へ移動させるよう構成した ことを特徴とする電子写真感光体の除電装置。[Scope of Claims] 1. In an original platen moving slit exposure type copying machine having a reciprocating document platen 7 and an imaging means for forming a projected image of the original on the document platen 7 on a photoreceptor 1, A reflection plate 14 movable in the same direction as the moving direction of the original table 7 is provided between the document table 7 and the image forming means, and a protrusion 15 is formed at one end of the reflection plate 14. Protrusions 16 and 17 are provided at the lower portions of both sides of the document table 7 in the moving direction, respectively, to engage with the projections 15 of the reflection plate 14, and when the document table 7 is moving forward and immediately after the document exposure is completed, One protrusion 16 of the document table 7 engages with the protrusion 15 of the reflection plate 14, and the reflection plate 14
moving the reflecting plate 14 in one direction so as to block the optical path between the document table 7 and the imaging means,
Also, when the document table 7 is moving back, the document table 7
When the document table 7 returns to the copying start position, the other protrusion 17 of the document table 7 engages with the protrusion 15 of the reflection plate 14, causing the reflection plate 14 to move between the document table 7 and the image forming means. The reflector 1 is placed so as to be out of the optical path.
4. A static eliminator for an electrophotographic photoreceptor, characterized in that it is configured to move 4 in the other direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15692780A JPS5781280A (en) | 1980-11-10 | 1980-11-10 | Destaticizer of electrophotographic receptor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15692780A JPS5781280A (en) | 1980-11-10 | 1980-11-10 | Destaticizer of electrophotographic receptor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5781280A JPS5781280A (en) | 1982-05-21 |
| JPS6342786B2 true JPS6342786B2 (en) | 1988-08-25 |
Family
ID=15638400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15692780A Granted JPS5781280A (en) | 1980-11-10 | 1980-11-10 | Destaticizer of electrophotographic receptor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5781280A (en) |
-
1980
- 1980-11-10 JP JP15692780A patent/JPS5781280A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5781280A (en) | 1982-05-21 |
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