JPH11246066A - Automatic manuscript conveying device - Google Patents
Automatic manuscript conveying deviceInfo
- Publication number
- JPH11246066A JPH11246066A JP5460798A JP5460798A JPH11246066A JP H11246066 A JPH11246066 A JP H11246066A JP 5460798 A JP5460798 A JP 5460798A JP 5460798 A JP5460798 A JP 5460798A JP H11246066 A JPH11246066 A JP H11246066A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- separation
- document
- separation roller
- friction coefficient
- 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
Links
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機等に搭載さ
れた自動原稿搬送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder mounted on a copying machine or the like.
【０００２】[0002]
【従来の技術】従来の自動搬送装置においては、原稿テ
ーブルに載置された最上位の原稿を呼び出しコロにて分
離部へ給紙し、分離部では、原稿を給紙方向へ送るよう
に回転する給紙コロと、給紙コロと逆方向に回転して原
稿を戻すように作用する分離コロとによって、１枚の原
稿のみを読み取り部へ搬送するように構成されている。
前記分離コロの原稿に対する摩擦係数は、給紙コロの原
稿に対する摩擦係数より小さく、原稿間の摩擦係数より
大きく設定されている。これにより、原稿を１枚ずつ分
離しながら搬送することができる。また、分離コロ及び
給紙コロの形状については、原稿の搬送効率を高めると
共に原稿に折れ等の不具合が発生するのを防ぐため、様
々な提案がなされている。例えば、分離コロと給紙コロ
との間に間隙を設け、一部を非接触とする構成、分離コ
ロと同軸に回転自在に固定され、給紙コロと圧接されて
連れ回りする従動コロを設け、分離コロと給紙コロを非
接触とする構成、分離コロと給紙コロを非接触に交互配
置する構成、等が提案されている。なお、この種の装置
として関連するものには、例えば実開昭６３−４５７３
２号公報、特開平８−１８８２８２号公報、特開平８−
２９７３８２号公報、実開平２−６１８４３号公報があ
る。2. Description of the Related Art In a conventional automatic conveying apparatus, the uppermost document placed on a document table is fed to a separation unit by a call roller, and the separation unit rotates to feed the document in the paper feeding direction. And a separation roller that rotates in the opposite direction to the sheet supply roller and returns the document, so that only one document is conveyed to the reading unit.
The friction coefficient of the separation roller with respect to the document is set to be smaller than the friction coefficient of the feed roller with respect to the document and larger than the friction coefficient between the documents. As a result, the document can be conveyed while being separated one by one. Various proposals have been made regarding the shapes of the separation roller and the paper feed roller in order to increase the document conveyance efficiency and prevent the document from being broken or other problems. For example, a gap is provided between the separation roller and the feeding roller, and a part is made non-contact.A driven roller is rotatably fixed coaxially with the separation roller, and is rotated by being pressed against the feeding roller. There have been proposed a configuration in which the separation roller and the feeding roller are not in contact, a configuration in which the separation roller and the feeding roller are alternately arranged in a non-contact manner, and the like. In addition, related to this type of device is, for example, Japanese Utility Model Laid-Open No. 63-4573.
No. 2, JP-A-8-188282, JP-A-8-188282
297382 and JP-A-2-61843.
【０００３】[0003]
【発明が解決しようとする課題】前記従来技術では、何
れの構成によっても分離コロの摩擦係数は１種類であっ
て、摩擦係数の大きい分離コロが給紙方向と反対方向
（給紙阻止方向）に常時回転しているため、分離コロに
給紙原稿の先端が当接して分離部に入り込めない不送り
ジャムが発生し易いという問題がある。また、給紙コロ
と回転自在な従動コロによって原稿を摺動搬送する構成
については、スリップが小さく搬送効率は良いが、やは
り給紙コロに原稿先端が当接して不送りジャムが発生す
る恐れがある。さらに、スリップが発生すると、原稿の
画像面が給紙ローラと擦れて給紙部材や原稿自体を汚す
恐れがある。In any of the above-mentioned prior arts, the separation roller has only one kind of friction coefficient in any of the configurations, and the separation roller having a large friction coefficient moves in the opposite direction to the sheet feeding direction (sheet feeding preventing direction). However, since the front end of the fed document abuts on the separation roller, a non-feeding jam that cannot enter the separation portion is likely to occur. In addition, in the configuration in which the document is slid and transported by the paper feed roller and the rotatable driven roller, the slip is small and the transport efficiency is good. is there. Further, when a slip occurs, the image surface of the document may rub against the sheet feeding roller, and the sheet feeding member or the document itself may be stained.
【０００４】本発明の目的は、このような問題点を改善
し、分離部でのスリップを抑制して搬送効率を高めると
共に、分離部での原稿不送りジャムを防止して信頼性の
高い自動原稿搬送装置を提供することにある。また、本
発明の目的は、これに加えて、給紙部材や原稿自体の汚
れを低減可能な自動原稿搬送装置を提供することにあ
る。SUMMARY OF THE INVENTION It is an object of the present invention to improve such a problem, to suppress the slip at the separation section, to improve the transport efficiency, and to prevent the non-feeding jam of the document at the separation section to obtain a highly reliable automatic transmission. An object of the present invention is to provide a document conveying device. Another object of the present invention is to provide an automatic document feeder capable of reducing stains on a sheet feeding member and a document itself.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するた
め、本発明の自動原稿搬送装置は、給紙された原稿を１
枚ずつ分離する分離部で、第１の軸回りに給紙方向に回
転する給紙コロと、前記分離部で、第２の軸回りに給紙
阻止方向に回転する分離コロとを有し、前記分離コロと
給紙コロは非接触に配置され、前記分離コロの中央部と
両端部の摩擦係数が異なることを特徴とする。In order to achieve the above object, an automatic document feeder according to the present invention comprises
A separating unit configured to separate the sheets one by one, including a feeding roller that rotates in a feeding direction about a first axis, and a separating roller that rotates in a feeding preventing direction about a second axis in the separating unit; The separation roller and the sheet feeding roller are arranged in a non-contact manner, and the center portion and the both end portions of the separation roller have different friction coefficients.
【０００６】また、前記分離コロの中央部の径が両端部
の径より大きく、前記中央部の摩擦係数が前記両端部の
摩擦係数より小さいことを特徴とする。さらに、前記分
離コロと同軸上で前記分離コロの両側に配置され、前記
給紙コロと圧接して同方向に連れ回りする従動コロを有
し、前記給紙コロには、中央部の径が両端部の径より小
さく形成された凹部を有し、前記従動コロの径は前記分
離コロの両端部の径より小さく、前記分離コロと従動コ
ロの軸方向における段差分、前記分離コロと給紙コロが
非接触で重なるように構成されたことを特徴とする。Further, the diameter of the center of the separation roller is larger than the diameter of both ends, and the coefficient of friction at the center is smaller than the coefficient of friction at both ends. Further, there is a driven roller which is disposed coaxially with the separation roller on both sides of the separation roller, is pressed against the sheet supply roller and rotates in the same direction, and the diameter of the central portion of the sheet supply roller is A concave portion formed to be smaller than a diameter of both ends; a diameter of the driven roller is smaller than a diameter of both ends of the separation roller; a step difference in an axial direction between the separation roller and the driven roller; The rollers are configured to overlap without contact.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の一形態を図
面を用いて説明する。図１は、本発明の実施の一形態に
おける自動原稿搬送装置の構成を示す図である。本実施
形態の自動原稿搬送装置は複写機本体（図示せず）に搭
載され、ヒンジ等の連結部材を介して開閉（リフトアッ
プ／ダウン）自在に構成されている。図１において、図
示していない原稿テーブルに載置されたシート状の原稿
１は、加圧板２と呼び出しコロ３にて加圧挟持されてお
り、その呼び出しコロ３にて給紙され、給紙コロ４及び
分離コロ５からなる分離部に送られて１枚ずつ分離され
るものである。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an automatic document feeder according to an embodiment of the present invention. The automatic document feeder of this embodiment is mounted on a copying machine main body (not shown), and is configured to be able to open and close (lift up / down) via a connecting member such as a hinge. In FIG. 1, a sheet-shaped document 1 placed on a document table (not shown) is pressed and held between a pressing plate 2 and a call roller 3, and is fed by the call roller 3. The sheet is sent to a separation section including the rollers 4 and the separation rollers 5 and separated one by one.
【０００８】図２及び図３に示す分離部は、図示してい
ない給紙モータの駆動により、給紙コロ軸１６（＝第１
の軸）に固定されて軸回り（矢印Ａ方向）に回転し、給
紙方向に原稿１を送る給紙コロ４と、分離コロ軸１１
（＝第２の軸）に固定されて軸回り（矢印Ｂ方向）に常
時回転し、給紙阻止方向に原稿１を送るガイドコロ１５
及びその両端の阻止コロ１２、軸受１４を介して分離コ
ロ軸１１に固定されて軸回り（矢印Ｃ方向）に給紙コロ
４と同方向に連れ回りする従動コロ１３からなる分離コ
ロ５とを有する。前記給紙コロ４は、凹形状（段差ｈ３
≒２．２ｍｍ）の中央部（＝凹部）を有し、その段差ｈ
３には、分離コロ５を構成するガイドコロ１５及びその
両端の阻止コロ１２と給紙コロ４との間の隙間Ｈ（前記
ｈ３及び後述のｈ１，ｈ２より、Ｈ＝ｈ３−（ｈ１＋ｈ
２）≒１ｍｍ）が含まれ、この隙間Ｈによって非接触状
態が保たれる。なお、給紙コロ４の両端部は、分離コロ
５を構成する従動コロ１３に加圧接触し、前述のように
従動コロ１３が連れ回りする。さらに、ガイドコロ１５
の径が阻止コロ１２の径より大きく、従動コロ１３の径
は阻止コロ１２の径より小さく設定されているので、阻
止コロ１２は給紙コロ４と段差ｈ１（≒１．０ｍｍ）
分、非接触で重り、ガイドコロ１５は給紙コロ４と段差
（ｈ１＋ｈ２（≒０．２ｍｍ）≒１．２ｍｍ）分、非接
触で重なる。なお、図２のＨｎは分離部のニップ幅を示
す。The separation unit shown in FIGS. 2 and 3 is driven by a paper feed motor (not shown) to drive the paper feed roller shaft 16 (= first
), And rotates around the axis (in the direction of arrow A) to feed the original 1 in the paper feeding direction;
(= Second shaft), and constantly rotates around the shaft (in the direction of arrow B) to feed the original 1 in the paper feed preventing direction.
And a separation roller 5 comprising a driven roller 13 which is fixed to the separation roller shaft 11 via blocking rollers 12 at both ends thereof and a bearing 14 and rotates around the axis (in the direction of arrow C) in the same direction as the sheet feeding roller 4. Have. The feed roller 4 has a concave shape (step h3).
(≒ 2.2 mm) central part (= recess), and the step h
3 includes a guide roller 15 constituting the separation roller 5 and a gap H between the blocking roller 12 at both ends thereof and the sheet supply roller 4 (from the above h3 and h1 and h2 described later, H = h3− (h1 + h).
2) ≒ 1 mm), and the gap H maintains the non-contact state. The both ends of the feed roller 4 are in pressure contact with the driven roller 13 constituting the separation roller 5, and the driven roller 13 rotates as described above. Furthermore, the guide roller 15
Is larger than the diameter of the blocking roller 12, and the diameter of the driven roller 13 is set smaller than the diameter of the blocking roller 12, so that the blocking roller 12 and the sheet feeding roller 4 have a step height h1 (≒ 1.0 mm).
The guide roller 15 overlaps the paper feed roller 4 by a step (h1 + h2 (≒ 0.2 mm) ≒ 1.2 mm) without contact. Note that Hn in FIG. 2 indicates the nip width of the separation portion.
【０００９】また、分離コロ５を構成するガイドコロ１
５（＝中央部）と阻止コロ１２（＝両端部）の摩擦係数
は異なり、ガイドコロ１５の摩擦係数μ３は、阻止コロ
１２の摩擦係数μ２より小さく設定されている。より具
体的には、「μ１：給紙コロ４の摩擦係数、μ２：阻止
コロ１２の摩擦係数、μ３：ガイドコロ１５の摩擦係
数、μ０：原稿１の摩擦係数」とすると、本実施形態で
は、「μ１≒１．２＞μ２≒０．８＞μ０≒０．５」及
び「μ３≒０．２≪μ０」の関係があり、阻止コロ１２
は例えばゴム等の弾性部材から、ガイドコロ１５及び従
動コロ１３は例えばポリエチレン等の樹脂から形成され
ている。Further, the guide roller 1 constituting the separation roller 5
The friction coefficient of the guide roller 15 is set to be smaller than the friction coefficient μ2 of the guide roller 15. More specifically, in this embodiment, "μ1: friction coefficient of paper feed roller 4, μ2: friction coefficient of blocking roller 12, μ3: friction coefficient of guide roller 15, μ0: friction coefficient of document 1" , “Μ1 ≒ 1.2> μ2 ≒ 0.8> μ0 ≒ 0.5” and “μ3 ≒ 0.2≪μ0”.
The guide roller 15 and the driven roller 13 are formed of a resin such as polyethylene, for example.
【００１０】また、搬送コロ対６、搬送ベルト兼用の白
色反射ガイド７等からなる搬送部は、図示していない搬
送モータの駆動により、前記分離部にて１枚ずつ分離さ
れた原稿１をスリットガラス８上の原稿読み取り位置へ
と搬送する。なお、白色反射ガイド７は原稿読み取り時
の白基準となるものである。また、排紙コロ対９は、図
示していない排紙モータの駆動により、読み取り後の原
稿１を原稿排紙台１８上に排出する。A transport section including a transport roller pair 6, a white reflection guide 7 also serving as a transport belt, and the like, are driven by a transport motor (not shown) to slit the originals 1 separated one by one by the separating section. The document is conveyed to a document reading position on the glass 8. The white reflection guide 7 serves as a white reference when reading a document. The discharge roller pair 9 discharges the read document 1 onto a document discharge table 18 by driving a discharge motor (not shown).
【００１１】一方、複写機本体側上部にコンタクトガラ
ス（図示せず）と共に設けられたスリットガラス８は、
原稿１中の数行分の画像に相当する面積を有し、前記コ
ンタクトガラスは最大サイズの原稿１よりもやや大きな
面積を有する。このスリットガラス８及び前記コンタク
トガラスの下方には、図示していない露光ランプ、第１
ミラー等からなる露光部が設けられており、前記コンタ
クトガラスに載置された原稿を読み取る際には、前記露
光ランプ及び第１ミラーを前記コンタクトガラス下方で
図１中、左右方向に移動させ、また、スリットガラス８
の読み取り位置（前記露光ランプの光が照射される位
置）で原稿１を読み取る際には、前記露光ランプ及び第
１ミラーをスリットガラス８の下方で停止させて、画像
情報を読み取るように構成されている。On the other hand, a slit glass 8 provided together with a contact glass (not shown) at the upper part of the main body of the copying machine,
The contact glass has an area corresponding to an image of several lines in the original 1, and the contact glass has an area slightly larger than that of the original 1 of the maximum size. Below the slit glass 8 and the contact glass, an exposure lamp (not shown)
An exposure unit including a mirror and the like is provided, and when reading a document placed on the contact glass, the exposure lamp and the first mirror are moved in the horizontal direction in FIG. 1 below the contact glass, Also, slit glass 8
When reading the original 1 at a reading position (position irradiated with the light of the exposure lamp), the exposure lamp and the first mirror are stopped below the slit glass 8 to read image information. ing.
【００１２】次に、本実施形態の自動原稿搬送装置の動
作について述べる。例えば、前記連結部材の閉動作によ
って自動原稿搬送装置を下降させ、原稿１を前記原稿テ
ーブルに画像面を上向きにして載置する。この際、原稿
１の給紙側端をストッパ１０に当接することにより位置
決めする。さらに、図示していない複写機本体操作部の
スタートボタンが押下されると、上方に退避していた呼
び出しコロ３が図１のように原稿１に当接するまで下降
し、加圧板２との間で原稿１を挟持加圧すると共に、給
紙方向に回転して最上位の原稿１から給紙する。こうし
て給紙された原稿１は、給紙コロ４が給紙方向に回転
し、分離コロ５を構成するガイドコロ１５及び阻止コロ
１２が反対方向（給紙阻止方向）に回転することによ
り、最上位の原稿１のみが阻止コロ１２のコーナー１７
ａ，１７ｂで分離され、給紙コロ４及び給紙コロ４に連
れ回りする従動コロ１３によって搬送コロ対６へと搬送
される。この際、摩擦係数のより小さいガイドコロ１５
は、摩擦係数のより大きい阻止コロ１２より段差ｈ２だ
け高い位置にあるので、給紙された原稿１をガイドコロ
１５により給紙コロ４とのニップ部へスムーズに案内す
ると共に、阻止コロ１２により、次原稿の進入を阻止す
ることができる。よって、分離部におけるスリップが非
常に小さい状態で分離動作を行うことができる。こうし
て１枚ずつ分離された原稿１は、搬送コロ対６によって
スリットガラス８へと搬送され、白色反射ガイド７とス
リットガラス８の間を通過する際、前記露光部による画
像面の読み取りが行われる。読み取り後の原稿１は、排
紙コロ対９を介して原稿排紙台１８に排出される。Next, the operation of the automatic document feeder of this embodiment will be described. For example, the automatic document feeder is lowered by the closing operation of the connecting member, and the document 1 is placed on the document table with the image surface facing upward. At this time, the document 1 is positioned by abutting the paper feed end of the document 1 against the stopper 10. Further, when a start button (not shown) of the copier main body operation section is pressed, the call roller 3 retracted upward descends until it comes into contact with the original 1 as shown in FIG. The document 1 is pinched and pressed, and is rotated in the sheet feeding direction to feed the document 1 from the uppermost document 1. The document 1 fed in this manner is most revolved by rotating the paper feed roller 4 in the paper feed direction and rotating the guide roller 15 and the blocking roller 12 constituting the separation roller 5 in the opposite direction (paper feed blocking direction). Only top document 1 is corner 17 of blocking roller 12
The sheet is separated at a and 17b, and is conveyed to the conveying roller pair 6 by the sheet feeding roller 4 and the driven roller 13 that follows the sheet feeding roller 4. At this time, the guide roller 15 having a smaller friction coefficient
Is located at a position higher by the step h2 than the blocking roller 12 having a larger coefficient of friction, so that the fed document 1 is smoothly guided by the guide roller 15 to the nip portion with the sheet feeding roller 4, and , The entry of the next original can be prevented. Therefore, the separation operation can be performed in a state where the slip in the separation section is very small. The document 1 thus separated one by one is conveyed to the slit glass 8 by the convey roller pair 6, and when passing between the white reflection guide 7 and the slit glass 8, the image surface is read by the exposure unit. . The read original 1 is discharged to a document discharge table 18 via a discharge roller pair 9.
【００１３】本実施形態によれば、分離コロ５の中央部
に摩擦係数が原稿１より小さいガイドコロ１５を有し、
その両端に原稿１及びガイドコロ１５より摩擦係数の大
きい阻止コロ１２を有し、さらに、分離コロ５の両端部
に給紙コロ４に連れ回りする従動コロ１３を有し、ガイ
ドコロ１５、阻止コロ１２、従動コロ１３の順に高くな
るように段差を設けると共に、給紙コロ４の中央部を凹
形状として、給紙コロ４がガイドコロ１５及び阻止コロ
１２と非接触で重なり、従動コロ１３に圧接するように
構成したので、原稿１はまず摩擦係数の小さいガイドコ
ロ１５に当接し、小さい搬送抵抗でスムーズに給紙コロ
４とのニップ部に進入し、次いで給紙コロ４と従動コロ
１３により効率的に搬送される。従って、原稿１のスリ
ップを小さくして搬送効率の低下及び原稿１の不送りを
防止すると共に、原稿面が給紙コロ４に擦れて汚れるの
を防ぐことができる。また、ガイドコロ１５の両端の阻
止コロ１２により、従来と同様に原稿１の重送を防止す
ることができる。According to the present embodiment, a guide roller 15 having a friction coefficient smaller than that of the document 1 is provided at the center of the separation roller 5,
At both ends, there are blocking rollers 12 having a higher friction coefficient than the original 1 and the guide rollers 15, and further, at both ends of the separation roller 5, there are driven rollers 13 which follow the paper feed roller 4, and the guide rollers 15 A step is provided so as to be higher in the order of the roller 12 and the driven roller 13, and the central portion of the paper feeding roller 4 is formed in a concave shape so that the paper feeding roller 4 overlaps the guide roller 15 and the blocking roller 12 in a non-contact manner. The original 1 first comes into contact with the guide roller 15 having a small coefficient of friction, smoothly enters the nip portion with the feed roller 4 with a small conveyance resistance, and then the feed roller 4 and the driven roller 13 for efficient transport. Accordingly, the slip of the document 1 can be reduced to prevent a reduction in the transport efficiency and the non-feed of the document 1, and also prevent the document surface from being rubbed by the feed roller 4 and contaminated. Further, the double feed of the document 1 can be prevented by the blocking rollers 12 at both ends of the guide roller 15 as in the related art.
【００１４】[0014]
【発明の効果】以上説明したように、本発明によれば、
分離部の分離コロ（＝ガイドコロ及び阻止コロ）と給紙
コロは非接触に配置され、分離コロの中央部（＝ガイド
コロ）と両端部（＝阻止コロ）の摩擦係数が異なるの
で、従来と同様に原稿の重送を防ぐと共に、分離部での
スリップを抑制して原稿不送りジャムの発生を防ぐこと
ができる。より具体的には、分離コロの中央部の径が両
端部の径より大きく、その中央部の摩擦係数が両端部の
摩擦係数より小さくなるように構成し、さらに、分離コ
ロの両側で給紙コロと圧接して連れ回りする従動コロを
有し、その従動コロの径は分離コロの両端部の径より小
さく、分離コロと従動コロの軸方向における段差分、分
離コロと給紙コロが非接触で重なるように構成したの
で、摩擦係数の小さい分離コロの中央部によって、スリ
ップを抑制して搬送効率を高めると共に、原稿不送りジ
ャムを防止して信頼性を高めることができる。また、ス
リップを抑制することにより、給紙部材や原稿自体の汚
れを低減することが可能である。As described above, according to the present invention,
Conventionally, the separation roller (= guide roller and blocking roller) and the feed roller of the separation section are arranged in non-contact, and the center (= guide roller) and both ends (= blocking roller) of the separation roller have different friction coefficients. In the same manner as described above, double feeding of originals can be prevented, and slip at the separation unit can be suppressed to prevent occurrence of an original non-feeding jam. More specifically, the diameter of the center of the separation roller is larger than the diameter of both ends, and the friction coefficient at the center is smaller than the friction coefficient of both ends. The driven roller has a driven roller that rotates while being pressed against the roller, and the diameter of the driven roller is smaller than the diameter of both ends of the separation roller. Since the contact rollers are configured to overlap each other, the center of the separation roller having a small coefficient of friction can suppress the slip and increase the transport efficiency, and can prevent the non-feeding jam of the document and enhance the reliability. Further, by suppressing the slip, it is possible to reduce the contamination of the sheet feeding member and the document itself.
【図１】本発明の実施の一形態における自動原稿搬送装
置の構成を示す図である。FIG. 1 is a diagram illustrating a configuration of an automatic document feeder according to an embodiment of the present invention.
【図２】図１の分離部の詳細を示す右側面図である。FIG. 2 is a right side view showing details of a separation unit in FIG. 1;
【図３】図１の分離部の詳細を示す正面図である。FIG. 3 is a front view showing details of a separation unit in FIG. 1;
４ 給紙コロ ５ 分離コロ １２ 阻止コロ １３ 従動コロ １５ ガイドコロ １７ａ，１７ｂ 阻止コロのコーナー Ｈ 給紙コロと分離コロの隙間 ｈ１ 阻止コロと従動コロの段差 ｈ２ 阻止コロとガイドコロの段差 ｈ３ 給紙コロの凹部段差 4 Feed Roller 5 Separation Roller 12 Blocking Roller 13 Follower Roller 15 Guide Roller 17a, 17b Corner of Blocking Roller H Gap Between Paper Roller and Separation Roller h1 Step Between Blocking Roller and Driven Roller h2 Step Between Blocking Roller and Guide Roller h3 Feeding Concave step of paper roller
Claims (3)
で、第１の軸回りに給紙方向に回転する給紙コロと、前
記分離部で、第２の軸回りに給紙阻止方向に回転する分
離コロとを有し、 前記分離コロと給紙コロは非接触に配置され、前記分離
コロの中央部と両端部の摩擦係数が異なることを特徴と
する自動原稿搬送装置。A separating section for separating the fed documents one by one; a feeding roller rotating in a feeding direction about a first axis; and a feeding section rotating about a second axis in the separating section. An automatic document feeder, comprising: a separation roller that rotates in a blocking direction; wherein the separation roller and the paper feed roller are arranged in a non-contact manner, and a friction coefficient between a central portion and both ends of the separation roller is different.
り大きく、前記中央部の摩擦係数が前記両端部の摩擦係
数より小さいことを特徴とする請求項１記載の自動原稿
搬送装置。2. The automatic document feeder according to claim 1, wherein a diameter of a central portion of the separation roller is larger than a diameter of both ends, and a friction coefficient of the center portion is smaller than a friction coefficient of the both ends. .
側に配置され、前記給紙コロと圧接して同方向に連れ回
りする従動コロを有し、前記給紙コロには、中央部の径
が両端部の径より小さく形成された凹部を有し、 前記従動コロの径は前記分離コロの両端部の径より小さ
く、前記分離コロと従動コロの軸方向における段差分、
前記分離コロと給紙コロが非接触で重なるように構成さ
れたことを特徴とする請求項２記載の自動原稿搬送装
置。3. A driven roller disposed coaxially with the separation roller on both sides of the separation roller, the driven roller being in pressure contact with the paper feed roller and rotating in the same direction. The diameter of the driven roller is smaller than the diameter of both ends of the separation roller, the step difference in the axial direction of the separation roller and the driven roller,
3. The automatic document feeder according to claim 2, wherein the separation roller and the paper feed roller overlap each other in a non-contact manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5460798A JPH11246066A (en) | 1998-03-06 | 1998-03-06 | Automatic manuscript conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5460798A JPH11246066A (en) | 1998-03-06 | 1998-03-06 | Automatic manuscript conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11246066A true JPH11246066A (en) | 1999-09-14 |
Family
ID=12975434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5460798A Pending JPH11246066A (en) | 1998-03-06 | 1998-03-06 | Automatic manuscript conveying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11246066A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8071211B2 (en) | 2006-10-02 | 2011-12-06 | Sumitomo Electric Industries, Ltd. | Surface-coated cutting tool |
-
1998
- 1998-03-06 JP JP5460798A patent/JPH11246066A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8071211B2 (en) | 2006-10-02 | 2011-12-06 | Sumitomo Electric Industries, Ltd. | Surface-coated cutting tool |
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