JPS61138938A - Original pressing mechanism of image reader - Google Patents

Original pressing mechanism of image reader

Info

Publication number
JPS61138938A
JPS61138938A JP26092284A JP26092284A JPS61138938A JP S61138938 A JPS61138938 A JP S61138938A JP 26092284 A JP26092284 A JP 26092284A JP 26092284 A JP26092284 A JP 26092284A JP S61138938 A JPS61138938 A JP S61138938A
Authority
JP
Japan
Prior art keywords
original
document
cover
platen glass
image reading
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
Application number
JP26092284A
Other languages
Japanese (ja)
Inventor
Yoshikatsu Oishi
大石 義勝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP26092284A priority Critical patent/JPS61138938A/en
Publication of JPS61138938A publication Critical patent/JPS61138938A/en
Pending legal-status Critical Current

Links

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  • Holders For Sensitive Materials And Originals (AREA)

Abstract

PURPOSE:To press an original securely with simple constitution and to improve resolution by fitting a filmy white sheet to the reverse surface of an original cover fixedly at its one end part, and providing an elastic member and a plate member which maintains flatness on the top surface of the white sheet. CONSTITUTION:An original cover 30 is placed covering platen glass 14 and fixed at this position by a latch mechanism, etc., to complete image readout preparations. When the original cover 30 is fixed at a cover closure position by a lock means such as a latch mechanism, sponge 40 is compressed between the reverse surface of the projection part 35 of the original cover and the platen glass 14 to press the original passing over the platen glass 14 against the platen glass surface with proper pressing force. Further, an aluminum plate 42 maintains the flatness of the original pressure cover 34, so the original never floats over the platen glass surface. The original pressure cover 34 is formed by sticking a transparent film 44 on the reverse surface of the white film 34. Therefore, an image with good resolution is formed on an image readout sensor 28.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は画@読取り装置の原稿押え機構に関する。[Detailed description of the invention] Industrial applications The present invention relates to a document holding mechanism for an image reading device.

従来の技術 最近の半導体技術、IC技術等の急速な発展により、C
ODイメージセンサ−等の固体イメージセンサ−を用い
た画像読取り装置がファクシミリ。
Conventional technology With the recent rapid development of semiconductor technology, IC technology, etc.
A facsimile is an image reading device that uses a solid-state image sensor such as an OD image sensor.

複写機等の○△機器分野で盛んに開発されるようになっ
てきている。画m読取り装置にtよ大別して、原稿固定
型及び原稿移動型の画像読取り装置がある。原稿移動型
の画像読取り装置は、一般的に駆動ローラど従動ローラ
とにより構成される原稿搬送ローラ対を原稿の搬送方向
に二組配置し、その間にプラテンガラスを配置して、こ
のプラテンガラス面で搬送1]−ラ対により搬送されて
くる原稿の読取りを行なうように構成している。すなわ
ちLEDバーアレイ等の原稿露光装置により、プラテン
ガラス上を搬送されてくる原稿を露光し、原稿からの反
射光をセルホックレンズ(光集束性ファイバー)等のレ
ンズによりCODイメージUンサー等の画像読取りセン
サー上に結tCするようにしている。このような構成の
画像読取り装置においては、二組の搬送ローラ対により
搬送される原稿面がプラテンガラス面より浮き上がると
、原R各面から画像読取りセンサーまでの距離が変化す
るので、画像の解像度低重につながる。そこでこの種の
画像読取り装置においては、原稿のプラテンガラス面か
らの浮き上がりを極力防止する必要があり、従来は白い
フィルム状のシートを原稿カバー裏面に張付けて、これ
により原稿を押える方法をとっていた。
It has been actively developed in the field of ○△ equipment such as copying machines. Image reading devices can be broadly divided into image reading devices of a fixed original type and a moving original type. A document moving type image reading device generally has two pairs of document conveying rollers, each consisting of a drive roller and a driven roller, arranged in the document conveyance direction, and a platen glass is placed between them. The apparatus is configured to read the document conveyed by the conveyance 1]-ra pair. In other words, a document exposure device such as an LED bar array exposes the document conveyed on the platen glass, and the reflected light from the document is read by a COD image analyzer or other device using a lens such as a cell-hoc lens (light-focusing fiber). It is designed to connect to the sensor. In an image reading device with such a configuration, when the surface of the document transported by the two pairs of transport rollers rises above the platen glass surface, the distance from each surface of the original R to the image reading sensor changes, so the resolution of the image changes. Leads to low weight. Therefore, in this type of image reading device, it is necessary to prevent the original from lifting off the platen glass surface as much as possible. Conventionally, a white film-like sheet is attached to the back of the original cover to hold down the original. Ta.

発明が解決しようとする問題点 しかし上述した白いフィルム状のシートを原稿カバー寝
首に張付け、これにより原稿を押える従来技術において
は、白いフィルム状のシートの平面が保てず、押えとし
て不十分であったり、また押えを強くすると、薄紙原稿
がアコーデオン状の詰りとなってしまうという不具合が
あった。
Problems to be Solved by the Invention However, in the conventional technique of attaching the above-mentioned white film-like sheet to the neck of the document cover and using this to press the document, the flatness of the white film-like sheet cannot be maintained, making it insufficient as a presser. If the presser foot is too strong, there is a problem in that thin paper originals become jammed in an accordion shape.

よって本発明は上述した従来技術の欠点を解決し、薄紙
から厚紙までの広い範囲の原稿にわたり簡単な構成で確
実な原稿押えを達成できる画像読取り装置の原稿押え機
構を提供することを目的とり−る。
SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a document holding mechanism for an image reading device that can achieve reliable document holding with a simple configuration for a wide range of documents from thin paper to thick paper. Ru.

問題点を解決するための手段 上述した従来技術の問題点を解決する為に、本発明は、
原稿搬送方向と直角方向に仲良した駆動ローラ及び従動
ローラ間に原稿を挟持して搬送し、画像読取り手段によ
りプラテンガラス上を移動りる原稿を読取る構成の画像
読取り装置にJ5いて、原稿カバー裏面にフィルム状の
白色シートをその一端部で固着して取付け、該白色シー
トの上面に弾性部材及び平面度を保持する板部材を設け
たことを特徴とする画像読取り装置の原稿押え機構を提
供する。
Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides the following:
J5 is installed in an image reading device configured to transport a document by sandwiching it between a driving roller and a driven roller that are arranged perpendicularly to the direction of document conveyance, and to read the document moving on a platen glass using an image reading means. To provide a document holding mechanism for an image reading device, characterized in that a film-like white sheet is fixedly attached at one end thereof, and an elastic member and a plate member for maintaining flatness are provided on the upper surface of the white sheet. .

本発明の望ましい実施態様によれば、フィルム状の白色
シートは100μ7FL厚のものを採用し、弾性部材と
してスポンジを使用し、さらに平面度を保持する板部材
としてアルミニウム板を使用して、これをフィルム状の
白色シー1〜の先端部上面に横方向に伸長して取付けた
。スポンジ等よりなる弾性部材は原稿カバーをしめたと
き、原稿カバー実画とプラテンガラス面との門で圧縮さ
れて、原稿を適当な押圧力でプラテンガラス面に押しく
=Jけるように作用する。
According to a preferred embodiment of the present invention, the film-like white sheet is 100μ7FL thick, a sponge is used as the elastic member, and an aluminum plate is used as the plate member to maintain flatness. It was attached to the top surface of the tip of a film-like white sheet 1 to extend in the horizontal direction. When the original cover is closed, the elastic member made of sponge or the like is compressed between the actual image of the original cover and the platen glass surface, and acts to push the original against the platen glass surface with an appropriate pressing force. .

作    用 上)ホしたように構成された本発明の原稿押え機構にお
いて、原稿カバーはその一端を回動支点として聞121
できるように構成されており、原稿カバーをしめた後こ
れをラッチ機構等で係止して画像読取り準備が完了する
。フィルム状の白色シートの上面に張付けられたスポン
ジ等の弾性部材が原稿カバーを閉じてこれをこの位置で
固定することにより、原稿カバー裏面とプラテンガラス
上面との間で圧縮されてプラテンガラス面上を搬送され
る原稿に適当な押圧力を加えるように作用する。
In the document holding mechanism of the present invention constructed as described above, the document cover is rotated 121 times with one end thereof as a pivot point.
After the document cover is closed, it is locked with a latch mechanism or the like, and preparation for image reading is completed. By closing the document cover and fixing it in this position, an elastic member such as a sponge attached to the top surface of the film-like white sheet is compressed between the back surface of the document cover and the top surface of the platen glass, and is compressed onto the platen glass surface. acts to apply an appropriate pressing force to the document being conveyed.

一方フィルム状の白色シートの先端部上面に接着された
アルミニウム等の板部材は、フィルム状の白色シートの
平面度を保持する作用をする。本発明の原稿押え機構は
このようにフィルム状の白色シートの上面に弾性部材及
び平面度を保持する為の板部材を張合わけて構成したの
で、プラテンガラス面からの原稿の浮き上がりを有効に
防止でき、その結果焦点ぼけを防止りることができる。
On the other hand, a plate member made of aluminum or the like adhered to the upper surface of the leading end of the film-like white sheet functions to maintain the flatness of the film-like white sheet. The document holding mechanism of the present invention is constructed by laminating an elastic member and a plate member for maintaining flatness on the top surface of a film-like white sheet, so that lifting of the document from the platen glass surface can be effectively prevented. As a result, defocusing can be prevented.

ざらに本発明の原稿押え機構によれば、薄紙から厚紙(
309/TIt乃至120!IF/ゴ)までの広い範囲
の原稿を原積詰りを起すことなく搬送することができる
Roughly, according to the document holding mechanism of the present invention, from thin paper to thick paper (
309/TIt to 120! It is possible to transport a wide range of documents up to IF/G) without causing original stack jams.

実  施  例 以下本発明を図面に示づ実施例に基づいて詳細に説明す
ることにする。第1図を参照すると、駆動O−ラ10及
び従動O−ラ12からなる搬送ローラ対が原稿搬送方向
に離間して二対設けられている。これら二組の原稿搬送
[J−ラ対の間にはプラテンガラス14が搬送される原
稿の幅方向に伸長して設けられている。プラテンガラス
14の両端部には原稿露光装置取付は部材16及び18
がそれぞれ取付けられており、これらの取付は部材16
.18に原稿照明用のしEDバーアレイ20及び22が
設けられている。各LEDバーアレイ20.22のプラ
テンガラス14に対向する側には凸面状部分24が形成
されており、この凸面状部分24によりLEDからの光
をプラテンガラス14上を通過する原稿15の面に集光
するようにしている。プラテンガラス14上を通過づる
原稿により反射された光はセルフォックレンズ(光集束
性ファイバー)によりCODイメージセンサ−等の画像
読取りセンサー28上に結像するように構成されている
。セルフォックレンズ26を使用することにより原稿面
と画像読取りセンサー28との距離を非常に短くするこ
とがCき、例えばこの距離を15乃至60#l#Iにす
ることができるため、画像読取り装置をコンパクトな設
計にするためには非常に便利なレンズである。画@読取
りセンナ−28は、たとえばCODイメージセンサ−で
構成されるが、これに限られるものではなく他の固体イ
メージセンサ−も勿論採用可能である。
EXAMPLES The present invention will be described in detail below based on examples shown in the drawings. Referring to FIG. 1, two pairs of conveying rollers, each consisting of a driving O-roller 10 and a driven O-roller 12, are provided spaced apart in the document conveying direction. A platen glass 14 is provided between these two sets of document transport [J-RA pairs, extending in the width direction of the document to be transported. At both ends of the platen glass 14, there are members 16 and 18 for mounting the document exposure device.
are attached respectively, and these attachments are done by member 16.
.. At 18, ED bar arrays 20 and 22 for illuminating the original are provided. A convex portion 24 is formed on the side of each LED bar array 20 . I try to make it shine. The light reflected by the original passing on the platen glass 14 is configured to be imaged on an image reading sensor 28 such as a COD image sensor by a SELFOC lens (light focusing fiber). By using the SELFOC lens 26, the distance between the document surface and the image reading sensor 28 can be made very short. This is a very convenient lens for creating a compact design. The image @reading sensor 28 is composed of, for example, a COD image sensor, but is not limited to this, and other solid-state image sensors can of course be used.

30は原稿カバーであり、その一端32を回動支点とし
て画像読取り装置本体に開閉自在に取付けられている。
Reference numeral 30 denotes a document cover, which is attached to the main body of the image reading apparatus so as to be openable and closable with one end 32 of the document cover as a pivot point.

原稿カバー30の裏面には凸部35が形成されており凸
部35の一側部36に本発明にかかる原稿押えカバー3
4が例えば接着等の手段で固着されている。第2図を参
照すると、本発明の原稿押えカバーの要部拡大図が示さ
れており、原稿押えカバー34は約100μm厚の白色
フィルム38の裏面に約200 tt yn厚の透明フ
ィルム44を張合わせ、ざらに白色フィルム38の上面
に原稿15をプラテンがラス14に適度な圧力で押し付
けるスポンジ40び原椙押えカバーの平面度を保持する
ためのアルミニウム板42を張合わせて構成されている
。スポンジ40に代えて他の適当な弾性体も採用可能で
あり、アルミニウム板42も他の板部材で勿論置換える
ことがぐきることはいうまでもない。透明フィルムシー
ト44は本発明の目的の為には必ずしも設ける必要はな
い。
A convex portion 35 is formed on the back surface of the document cover 30, and a document holding cover 3 according to the present invention is formed on one side 36 of the convex portion 35.
4 is fixed by, for example, adhesive. Referring to FIG. 2, there is shown an enlarged view of the essential parts of the original document holding cover 34 of the present invention. In addition, on the upper surface of a roughly white film 38, a sponge 40 for pressing the document 15 against the lath 14 by a platen with appropriate pressure, and an aluminum plate 42 for maintaining the flatness of the original presser cover are laminated. It goes without saying that other suitable elastic bodies can be used in place of the sponge 40, and the aluminum plate 42 can of course be replaced with other plate members. The transparent film sheet 44 is not necessarily required for the purposes of the present invention.

このように構成された本発明の画像iA取り装置の原稿
押え機構において、原稿カバー30をプラテンガラス上
に被せ、ラッチ機構等により原稿カバー30をこの位置
に止めることにより画像読取り準備が完了する。原稿カ
バー30をラップ−機構等の係止手段によりカバー閉位
置に固定すると、スポンジ40が原稿カバーの凸部35
の下面とプラテンガラス14との間で圧縮されてプラテ
ンガラス14上を通過する原稿を適度の押圧力でプラテ
ンガラス面に押し付ける。さらにアルミニウム板42に
よ′り原稿押えカバー34の平面度が保持されるので、
原稿はプラテンガラス面から浮き上がることはほとんど
なく、解像度の良い画像を画像読取りセンサー28上に
結像することができる。
In the document holding mechanism of the image iA capture device of the present invention configured as described above, preparation for image reading is completed by placing the document cover 30 over the platen glass and stopping the document cover 30 in this position using a latch mechanism or the like. When the document cover 30 is fixed in the cover closed position by a locking means such as a wrap mechanism, the sponge 40 touches the convex portion 35 of the document cover.
The original compressed between the lower surface of the platen glass 14 and the platen glass 14 and passing over the platen glass 14 is pressed against the platen glass surface with an appropriate pressing force. Furthermore, since the flatness of the document holding cover 34 is maintained by the aluminum plate 42,
The document hardly lifts off the platen glass surface, and a high-resolution image can be formed on the image reading sensor 28.

発明の効果 本発明の原稿押え機構は以上詳述したように構成したの
で、搬送ローラ対により搬送づる原稿をプラテンガラス
面に密看して搬送することができる為、たとえ焦点深度
の浅いレンズを使用した場合でも焦点ぼけはほとんど起
らないという効果を秦することができる。さらに本発明
の構成によれば、薄紙から厚紙までの広い範囲の原稿を
原稿詰りを起すことなく搬送することができる。
Effects of the Invention Since the document holding mechanism of the present invention is constructed as described in detail above, the document being conveyed by the pair of conveyance rollers can be conveyed while being closely monitored against the platen glass surface. Even when used, it is possible to achieve the effect that defocus hardly occurs. Further, according to the configuration of the present invention, a wide range of documents from thin paper to thick paper can be conveyed without causing document jams.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の原稿押え機構を採用した画像読取り装
置の概略側面図、 第2図は本発明の原稿押え機構の要部側面図である。 10:駆動ローラ   12:従動ローラ14ニブラテ
ンガラス 15:原稿 20.22 : LEDバーアレイ 26:セルホックレンズ 28:画像読取りセンサー
FIG. 1 is a schematic side view of an image reading apparatus employing the document holding mechanism of the present invention, and FIG. 2 is a side view of essential parts of the document holding mechanism of the present invention. 10: Drive roller 12: Followed roller 14 Nibraten glass 15: Original 20.22: LED bar array 26: Self-hook lens 28: Image reading sensor

Claims (1)

【特許請求の範囲】[Claims] 原稿搬送方向と直角方向に伸長した駆動ローラ及び従動
ローラ間に原稿を挟持して搬送し、画像読取り手段によ
りプラテンガラス上を移動する原稿を読取る構成の画像
読取り装置において、原稿カバー裏面にフィルム状の白
色シートをその一端部で固着して取付け、該白色シート
の上面に弾性部材及び平面度を保持する板部材を設けた
ことを特徴とする画像読取り装置の原稿押え機構。
In an image reading device configured to transport a document while sandwiching it between a drive roller and a driven roller extending perpendicular to the direction of document conveyance, and to read the document moving on a platen glass using an image reading means, a film-like film is attached to the back surface of the document cover. A document holding mechanism for an image reading device, characterized in that a white sheet is fixedly attached at one end thereof, and an elastic member and a plate member for maintaining flatness are provided on the upper surface of the white sheet.
JP26092284A 1984-12-12 1984-12-12 Original pressing mechanism of image reader Pending JPS61138938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26092284A JPS61138938A (en) 1984-12-12 1984-12-12 Original pressing mechanism of image reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26092284A JPS61138938A (en) 1984-12-12 1984-12-12 Original pressing mechanism of image reader

Publications (1)

Publication Number Publication Date
JPS61138938A true JPS61138938A (en) 1986-06-26

Family

ID=17354621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26092284A Pending JPS61138938A (en) 1984-12-12 1984-12-12 Original pressing mechanism of image reader

Country Status (1)

Country Link
JP (1) JPS61138938A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0185747U (en) * 1987-11-26 1989-06-07
JPH02176743A (en) * 1988-12-28 1990-07-09 Copyer Co Ltd Document conveying device of image forming device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419742A (en) * 1977-07-13 1979-02-14 Ricoh Co Ltd Sheet feeder
JPS5764733A (en) * 1980-10-08 1982-04-20 Canon Inc Original press-contacting device
JPS59166936A (en) * 1983-03-14 1984-09-20 Fuji Xerox Co Ltd Original holding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419742A (en) * 1977-07-13 1979-02-14 Ricoh Co Ltd Sheet feeder
JPS5764733A (en) * 1980-10-08 1982-04-20 Canon Inc Original press-contacting device
JPS59166936A (en) * 1983-03-14 1984-09-20 Fuji Xerox Co Ltd Original holding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0185747U (en) * 1987-11-26 1989-06-07
JPH02176743A (en) * 1988-12-28 1990-07-09 Copyer Co Ltd Document conveying device of image forming device

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