JPH0584516B2 - - Google Patents
Info
- Publication number
- JPH0584516B2 JPH0584516B2 JP60099177A JP9917785A JPH0584516B2 JP H0584516 B2 JPH0584516 B2 JP H0584516B2 JP 60099177 A JP60099177 A JP 60099177A JP 9917785 A JP9917785 A JP 9917785A JP H0584516 B2 JPH0584516 B2 JP H0584516B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- roller
- document
- exposure position
- leading edge
- 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
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- Holders For Sensitive Materials And Originals (AREA)
- Paper Feeding For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は電子写真複写装置に関し、特に、露
光学系を停止した状態で上部に設けた自動原稿送
り装置で原稿を移動させつつ原稿の露光を行なう
ようにした電子写真複写装置に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrophotographic copying apparatus, and in particular, the present invention relates to an electrophotographic copying apparatus, and in particular, to an electrophotographic copying apparatus that exposes a document while moving the document using an automatic document feeder provided at the top with an exposure system stopped. The present invention relates to an electrophotographic copying apparatus that performs the following operations.
一般に、自動原稿送り装置（ADF）を備えた
電子写真複写装置にあつては第２図のように構成
されている。
Generally, an electrophotographic copying apparatus equipped with an automatic document feeder (ADF) is constructed as shown in FIG.
すなわち、前記自動原稿送り装置は複数枚の紙
からなる原稿１を積重ねた状態でセツトする原稿
セツト台２とを備え、この原稿セツト台２の図中
右方には給紙装置３が設けられている。 That is, the automatic document feeder includes a document setting table 2 on which the document 1 consisting of a plurality of sheets of paper is set in a stacked state, and a paper feeder 3 is provided on the right side of the document setting table 2 in the figure. ing.
この給紙装置３はローラ４，４間に張設される
給紙ベルト５と、この給紙ベルト５の下面に圧着
する圧着ローラ６とからなり、この給紙装置３に
連続して上下一対の給紙ローラ３３が設けられ、
また、前記給紙装置３の下方には給紙側ローラ７
および排紙側ローラ８が設けられ、この両ローラ
７，８間に搬送ベルト９が張設されるとともに、
給紙側ローラ７に搬送ベルト９を圧着するための
テンシヨンローラ１０が設けられている。 This paper feeding device 3 consists of a paper feeding belt 5 stretched between rollers 4, 4, and a pressure roller 6 that presses against the lower surface of this paper feeding belt 5. A paper feed roller 33 is provided,
Further, below the paper feeding device 3, a paper feeding side roller 7 is provided.
and a paper discharge side roller 8 are provided, and a conveyor belt 9 is stretched between both rollers 7 and 8.
A tension roller 10 is provided for pressing the conveyor belt 9 onto the paper feed side roller 7.
また、前記上下一対の給紙ローラ３３に連続し
て、原稿１を反転しつつ下方に指向するガイド板
１１が設けられ、このガイド板１１の途中の切欠
部１１ａには検知部材３２が設けられている。 Further, a guide plate 11 is provided in succession to the pair of upper and lower paper feed rollers 33, and the guide plate 11 is directed downward while reversing the document 1. A detection member 32 is provided in a notch 11a in the middle of the guide plate 11. ing.
さらに、前記搬送ベルト９の下面を、この自動
原稿送り装置の下部に配設されている電子写真複
写装置の原稿ガラス台１２に所定の間隙で接近さ
せるための３つのバツクアツプローラ１３ａ，１
３ｂ，１３ｃが設けられている。 Furthermore, three back-up rollers 13a, 1 are provided for bringing the lower surface of the conveyor belt 9 close to a document glass table 12 of an electrophotographic copying device disposed at the bottom of the automatic document feeder at a predetermined gap.
3b and 13c are provided.
また、１４は上下一対の排紙ローラ、１５は排
紙トレイである。 Further, 14 is a pair of upper and lower paper ejection rollers, and 15 is a paper ejection tray.
そして、前記自動原稿送り装置の下部に配設さ
れた電子写真複写装置は、自動原稿送り装置との
同期送りを行なう場合には、その露光ランプ１６
の照射位置である露光位置が、中央のバツクアツ
プローラ１３ｂの下方の搬送ベルト９の下面を露
光する位置となるとともに、露光ランプ１６の反
射光は第１ミラー17、第２、３ミラー１８，１
９、レンズ２０および第４ミラー２１を介して像
担持体２２に導びかれる。 When the electrophotographic copying apparatus disposed below the automatic document feeder performs synchronized feeding with the automatic document feeder, the exposure lamp 16 is
The exposure position, which is the irradiation position of 1
9, guided to the image carrier 22 via the lens 20 and the fourth mirror 21.
一方、給紙カセツト２３内の転写紙Ｐは、給紙
ローラ２４によつて送り出されたのちに上下一対
のレジストローラ２５で待機され、こののちに前
記検知部材３２による原稿先端の検知信号により
クラツチが接続されてレジストローラ２５が回転
して送り出され、転写極２６および分離極２７を
介して搬送装置２８で定着装置２９へ搬送された
のちに排出ローラ３０によつて排出トレイ３１上
に排出される。 On the other hand, the transfer paper P in the paper feed cassette 23 is sent out by the paper feed roller 24 and is then put on standby by a pair of upper and lower registration rollers 25, after which it is clutched by the detection signal of the leading edge of the document from the detection member 32. is connected, the registration roller 25 is rotated, and the image is sent out.The image is conveyed to the fixing device 29 by the conveyance device 28 via the transfer pole 26 and the separation pole 27, and then discharged onto the discharge tray 31 by the discharge roller 30. Ru.
そして、上記のような場合に、前記検知部材３
２および露光位置の決定は以下の事を考慮して行
なわれている。 In the above case, the detection member 3
2 and the exposure position are determined in consideration of the following.
まず、検知部材３２の位置を決定する場合に
は、搬送ベルト９が白色であるために、検知部材
３２による搬送ベルト９と原稿との識別がむずか
しいので、搬送ベルト９の影響を受けず、かつ、
転写紙Ｐを搬送するためのレジストローラ２５の
回転スタートタイミンングを取るためにできるだ
け露光位置に近くの位置として、ガイド板１１の
出口の近傍に設けており、また、露光ランプ１６
の照射による露光位置は、原稿自動送り装置の搬
送ベルト９の上下方向のブレによる画像の乱れを
防止するためにバツクアツプローラ１３ａ，１３
ｂ，１３ｃのうちのいずれかのものの近傍である
こと、および搬送ベルト９によつて搬送される原
稿の搬送速度はＢ領域に達すると搬送ベルト９の
支配下に入るために、全面に渡つて安定した画像
を得るためには露光位置はこのＢ領域でなければ
ならないということがある。 First, when determining the position of the detection member 32, since the conveyance belt 9 is white, it is difficult for the detection member 32 to distinguish between the conveyance belt 9 and the document. ,
In order to obtain the rotation start timing of the registration roller 25 for conveying the transfer paper P, the exposure lamp 16 is provided near the exit of the guide plate 11 as a position as close as possible to the exposure position.
The exposure position by the irradiation is set at the back up rollers 13a, 13 in order to prevent the image from being disturbed due to the vertical movement of the conveyor belt 9 of the automatic document feeder.
b, 13c, and the conveyance speed of the document conveyed by the conveyor belt 9 is controlled by the conveyor belt 9 when it reaches area B. In order to obtain a stable image, the exposure position must be in this B area.
すなわち、露光位置をＡ領域としたならば、こ
のＡ領域においては原稿１の搬送は、原稿１と搬
送ベルト９との接触面積が少ないために給紙ロー
ラ３３の搬送速度の支配下におかれることなく、
これによつて安定した原稿の搬送が行えないから
である。 That is, if the exposure position is set to area A, the conveyance of the document 1 in this area A is under the control of the conveyance speed of the paper feed roller 33 because the contact area between the document 1 and the conveyance belt 9 is small. without any
This is because the document cannot be transported stably.
そして、露光ランプ１６の照射による露光位置
の決定は転写紙Ｐの先端タイミングを像担持体２
２上に形成された画像の先端と一致させるうえで
検知部材３２の位置に可能なかぎり近い位置であ
ること等を考慮して中央のバツクアツプローラ１
３ｂの下方としている。 The exposure position is determined by irradiating the exposure lamp 16 by adjusting the leading edge timing of the transfer paper P to the image carrier 2.
The central back-up roller 1 is positioned as close as possible to the position of the detection member 32 in order to match the leading edge of the image formed on the center back-up roller 1.
It is below 3b.
しかしながら、上記のように構成されている原
稿自動送り装置を備えた電子写真複写装置におい
て、露光系を停止して原稿を搬送しつつ露光を行
なう同期送りを行なう際には、搬送ベルト９と原
稿ガラス台１２とにより形成される原稿突入領域
Ｃにおける原稿の搬送ベルト９への突入状況が、
原稿先端のカール状況によりばらつくために不安
定となつて、この原稿突入領域Ｃにおける原稿先
端の搬送速度にばらつきが生じ、結果的に、原稿
先端が検知部材３２を横切つてから露光位置に達
するまでの時間にばらつきを生じてずれる場合が
あり、これにより、像形成体２２上に形成された
画像の先端と転写紙Ｐの先端とが大きくずれて転
写紙Ｐ上の所定の位置に像担持体２２上の画像が
転写されない場合があるという問題点を有してい
た。 However, in an electrophotographic copying apparatus equipped with an automatic document feeder configured as described above, when performing synchronous feeding in which the exposure system is stopped and the document is exposed while being transported, the transport belt 9 and the document The state of entry of the original into the conveyor belt 9 in the original entry area C formed by the glass table 12 is as follows.
This becomes unstable due to variations in the curl condition of the leading edge of the original, resulting in variations in the transport speed of the leading edge of the original in this document entry area C, and as a result, the leading edge of the original reaches the exposure position after crossing the detection member 32. In some cases, the leading edge of the image formed on the image forming body 22 and the leading edge of the transfer paper P are significantly shifted, causing the image to be held at a predetermined position on the transfer paper P. There is a problem in that the image on the body 22 may not be transferred.
この発明は前記のような従来のもののもつ問題
点を解決したもので、転写紙の先端のカール状況
に係らず常に先端タイミングのばらつきが少な
く、かつ、安定した良好な画像を得ることのでき
る電子写真複写装置を提供することを目的とす
る。
This invention solves the problems of the conventional methods as described above, and is an electronic system that can always produce stable and good images with little variation in the timing of the leading edge of the transfer paper, regardless of the curling condition of the leading edge of the transfer paper. The purpose of the present invention is to provide a photocopying device.
この発明は、露光系を所定装置に停止してここ
を露光位置とし、自動原稿送り装置の搬送ベルト
を給紙側ローラと排紙側ローラとの間に張設し、
該搬送ベルトにより給紙側ローラ側から排紙側ロ
ーラ側に一定速度で搬送される原稿を露光して像
担持体上に一次画像を形成し、この一次画像の先
端と転写紙の先端とを一致させるために、転写紙
の繰り出しタイミングを前記原稿の搬送を検知す
る検知部材の信号で行う電子写真複写装置におい
て、前記露光系の露光位置を、前記排紙側ローラ
に近接した位置とし、かつ、前記搬送ベルトの下
面を原稿ガラス台に所定の間〓で近接させるバツ
クアツプローラの下方の位置とし、前記検知部材
を前記露光位置に対して前記原稿の進行方向先方
で、かつ、前記露光位置に近接させた構成を有し
ている。
In this invention, the exposure system is stopped at a predetermined device and this is set as the exposure position, and the conveyor belt of the automatic document feeder is stretched between the paper feed side roller and the paper ejection side roller.
A primary image is formed on the image carrier by exposing the document, which is conveyed at a constant speed from the paper feed side roller side to the paper discharge side roller side by the conveyance belt, and the leading edge of this primary image and the leading edge of the transfer paper are connected. In order to match, in an electrophotographic copying apparatus in which the feeding timing of the transfer paper is determined by a signal from a detection member that detects the conveyance of the document, the exposure position of the exposure system is set to a position close to the paper ejection side roller, and , the lower surface of the conveyor belt is positioned below a back-up roller that brings the lower surface of the conveyor belt close to the original glass table at a predetermined distance; It has a configuration that is close to.
以下、図面に示すさの発明の実施例について説
明する。
Embodiments of the invention shown in the drawings will be described below.
第１図にはこの発明による電子写真複写装置の
概略図が示されていて、前記従来のものと同一の
部材には同一の番号を付して説明を省略する。 FIG. 1 shows a schematic diagram of an electrophotographic copying apparatus according to the present invention, and the same members as those in the conventional apparatus are given the same numbers and their explanations will be omitted.
すなわち、露光ランプ１６による露光位置は、
バツクアツプローラ１３ａ，１３ｂ，１３ｃのう
ち一番排紙ローラ８側に接近したバツクアツプロ
ーラ１３ａの下方とするとともに、検知部材４０
は前記露光位置に対して原稿の搬送方向先方とな
つている。 That is, the exposure position by the exposure lamp 16 is
Among the back up rollers 13a, 13b, and 13c, the back up roller 13a closest to the paper ejection roller 8 side is positioned below the back up roller 13a, and the detection member 40
is located ahead of the exposure position in the document transport direction.
そして、前記のものの作用について説明する
と、まず、前記検知部材４０が原稿１の先端を検
知する位置は、原稿１の搬送が搬送ベルト９の支
配下におかれているＢ領域であるので、安定した
搬送が行われているとともに、露光位置がバツク
アツプローラ１３ａの下方であるので、この位置
にあつては搬送中に露光される原稿に上下方向の
ぶれが生じることがない。 To explain the operation of the above-mentioned device, first, the position where the detection member 40 detects the leading edge of the document 1 is in area B where the conveyance of the document 1 is under the control of the conveyor belt 9, so it is stable. Since the exposure position is below the backup roller 13a, there is no vertical blurring of the exposed document during transportation at this position.
これによつて像担持体２２上には安定したが画
像が形成され、また、露光位置と検知部材４０に
よる原稿１の先端の検知位置とが接近しており、
さらに、原稿の先端が露光位置に達してから、検
知部材４０を横切るまでの間の搬送は、従来のも
ののように原稿搬送に関する不安定領域がないた
めに安定しており、したがつて、転写紙の先端タ
イミングのばらつきが非常に少なくなつて、良好
な転写画像を得ることができるものである。 As a result, a stable image is formed on the image carrier 22, and the exposure position and the position where the leading edge of the document 1 is detected by the detection member 40 are close to each other.
Further, the conveyance from the time when the leading edge of the document reaches the exposure position until it crosses the detection member 40 is stable because there is no unstable area related to the document conveyance as in the conventional case. Variations in the timing of the leading edge of the paper are extremely reduced, making it possible to obtain a good transferred image.
そして上記のように像担持体２２上の画像を転
写極２６によつて転写された転写紙Ｐは、その
後、分離極２７で分離されて、搬送装置２８で定
着装置２９に搬送されて定着され、排紙ローラ３
０を介して排紙トレイ３１上に達するものであ
る。 The transfer paper P on which the image on the image carrier 22 has been transferred by the transfer pole 26 as described above is then separated by the separation pole 27 and transported by the transport device 28 to the fixing device 29 where it is fixed. , paper ejection roller 3
0 and reaches onto the paper discharge tray 31.
この発明は前記のように、露光系の露光位置
を、排紙側ローラに近接した位置とし、かつ、搬
送ベルトの下面を原稿ガラス台に所定の間〓で近
接させるバツクアツプローラの下方の位置とし、
また、検知部材を露光位置に対して原稿の進行方
向先方で、かつ、露光位置に近接させたので、露
光系の露光位置および検知部材が原稿の先端を検
知する位置は共に、原稿の搬送ベルトの支配下に
おかれている安定領域となり、しかも露光系の露
光位置がバツクアツプローラの下方となるので、
一定の速度で搬送される原稿を、上下方向にぶれ
を生じない状態で、露光系が原稿を露光できると
ともに、検知部材が原稿の先端を検知することが
できるため、像担持体上に形成される画像は常に
安定した良好なものになるとともに、像担持体上
の画像の先端に対して転写紙の先端タイミングを
一致させることができて、良好な転写画像を得る
ことができる等のすぐれた効果を有するものであ
る。
As described above, this invention sets the exposure position of the exposure system at a position close to the paper ejection side roller, and also sets the lower surface of the conveyor belt at a position below the back-up roller that approaches the original glass table at a predetermined distance. year,
In addition, since the detection member is located ahead of the exposure position in the direction of travel of the original and close to the exposure position, both the exposure position of the exposure system and the position where the detection member detects the leading edge of the original are located on the original transport belt. This is a stable area under the control of the backplane, and the exposure position of the exposure system is below the back-up propeller.
The exposure system can expose the document being conveyed at a constant speed without causing vertical blurring, and the detection member can detect the leading edge of the document. The resulting image is always stable and good, and the timing of the leading edge of the transfer paper can be matched with the leading edge of the image on the image carrier, resulting in excellent transferred images. It is effective.
第１図はこの発明による電子写真複写装置を示
す概略配置図、第２図は従来の電子写真複写装置
を示す概略配置図である。
１……原稿、２……原稿セツト台、３……給紙
装置、７……給紙側ローラ、８……排紙側ロー
ラ、９……搬送ベルト、１１……ガイド板、１２
……原稿ガラス台、１３ａ，１３ｂ，１３ｃ……
バツクアツプローラ、１４，３０……排紙ロー
ラ、１５，３１……排紙トレイ、１６……露光ラ
ンプ、２２……像担持体、２３……給紙カセツ
ト、２４……給紙ローラ、２５……レジストロー
ラ、２６……転写極、２７……分離極、２８……
搬送装置、、２９……定着装置、３２，４０……
検知部材。
FIG. 1 is a schematic layout diagram showing an electrophotographic copying apparatus according to the present invention, and FIG. 2 is a schematic layout diagram showing a conventional electrophotographic copying apparatus. DESCRIPTION OF SYMBOLS 1...Original, 2...Document setting table, 3...Paper feeder, 7...Paper feed side roller, 8...Paper discharge side roller, 9...Transport belt, 11...Guide plate, 12
...Original glass stand, 13a, 13b, 13c...
Backup roller, 14, 30... paper ejection roller, 15, 31... paper ejection tray, 16... exposure lamp, 22... image carrier, 23... paper feed cassette, 24... paper feed roller, 25 ... Registration roller, 26 ... Transfer pole, 27 ... Separation pole, 28 ...
Conveying device, 29... Fixing device, 32, 40...
Detection member.
Claims (1)
とし、自動原稿送り装置の搬送ベルトを給紙側ロ
ーラと排紙側ローラとの間に張設し、該搬送ベル
トによつて給紙側ローラ側から排紙側ローラ側に
一定速度で搬送される原稿を露光して像担持体上
に一次画像を形成し、この一次画像の先端と転写
紙の先端とを一致させるために、転写紙の繰り出
しタイミングを前記原稿の搬送を検知する検知部
材の信号で行う電子写真複写装置において、 前記露光系の露光位置を、前記排紙側ローラに
近接した位置とし、かつ、前記搬送ベルトの下面
を原稿ガラス台に所定の間〓で近接させるバツク
アツプローラの下方の位置し、 前記検知部材を前記露光位置に対して前記原稿
の進行方向先方で、かつ、前記露光位置に近接さ
せたことを特徴とする電子写真複写装置。[Scope of Claims] 1. The exposure system is stopped at a predetermined device, this is set as the exposure position, and the conveyance belt of the automatic document feeder is stretched between the paper feed side roller and the paper ejection side roller, and the conveyance belt A primary image is formed on the image carrier by exposing the original that is transported at a constant speed from the paper feed roller side to the paper output roller side, and the leading edge of this primary image is aligned with the leading edge of the transfer paper. In order to do this, in an electrophotographic copying apparatus in which the timing of feeding out the transfer paper is determined by a signal from a detection member that detects the conveyance of the document, the exposure position of the exposure system is set close to the paper discharge side roller, and The conveyor belt is positioned below a back-up roller that brings the lower surface of the conveyor belt close to the document glass table at a predetermined distance, and the detection member is positioned ahead in the traveling direction of the document with respect to the exposure position and at the exposure position. An electrophotographic copying device characterized in that they are placed close to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60099177A JPS61256342A (en) | 1985-05-10 | 1985-05-10 | Electrophotographic copying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60099177A JPS61256342A (en) | 1985-05-10 | 1985-05-10 | Electrophotographic copying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61256342A JPS61256342A (en) | 1986-11-13 |
| JPH0584516B2 true JPH0584516B2 (en) | 1993-12-02 |
Family
ID=14240366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60099177A Granted JPS61256342A (en) | 1985-05-10 | 1985-05-10 | Electrophotographic copying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61256342A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2612268B2 (en) * | 1987-04-07 | 1997-05-21 | 株式会社リコー | Electrostatic copier |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5436725A (en) * | 1977-08-26 | 1979-03-17 | Ricoh Co Ltd | Zerographic copying method |
| JPS6038708B2 (en) * | 1977-11-07 | 1985-09-02 | キヤノン株式会社 | variable magnification copying device |
| US4469436A (en) * | 1981-11-06 | 1984-09-04 | Xerox Corporation | Recirculation document handling methods and apparatus and copiers incorporating such apparatus |
| JPS58202437A (en) * | 1982-05-20 | 1983-11-25 | Canon Inc | copying device |
| JPS59149245A (en) * | 1983-02-08 | 1984-08-27 | Konishiroku Photo Ind Co Ltd | Transportation of original copy in copying machine |
-
1985
- 1985-05-10 JP JP60099177A patent/JPS61256342A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61256342A (en) | 1986-11-13 |
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