JP2866538B2 - Automatic document feeder - Google Patents
Automatic document feederInfo
- Publication number
- JP2866538B2 JP2866538B2 JP4265413A JP26541392A JP2866538B2 JP 2866538 B2 JP2866538 B2 JP 2866538B2 JP 4265413 A JP4265413 A JP 4265413A JP 26541392 A JP26541392 A JP 26541392A JP 2866538 B2 JP2866538 B2 JP 2866538B2
- Authority
- JP
- Japan
- Prior art keywords
- pressing
- pressing member
- document
- wide
- document feeder
- 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 - Fee Related
Links
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Facsimiles In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機、プリンタ、ファ
クシミリ等の画像形成装置に備えられる原稿自動送り装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder provided in an image forming apparatus such as a copying machine, a printer and a facsimile.
【０００２】[0002]
【従来の技術】複写機、プリンタ、ファクシミリ等の画
像形成装置において、原稿をプラテンガラス上の所定位
置に給送する原稿自動送り装置を備えたものが知られて
いる。2. Description of the Related Art There is known an image forming apparatus such as a copying machine, a printer, a facsimile, etc., which includes an automatic document feeder for feeding a document to a predetermined position on a platen glass.
【０００３】また、画像形成装置の原稿読み取り方式と
して画像形成装置内の画像読み取り部（光学系）を所定
位置に固定し、原稿自動送り装置の幅広搬送ベルトによ
り原稿を一定速度でプラテンガラス上を搬送しながら露
光走査させる方式（原稿流し読み方式）が知られてい
る。As a document reading method of the image forming apparatus, an image reading section (optical system) in the image forming apparatus is fixed at a predetermined position, and the document is moved on the platen glass at a constant speed by a wide conveying belt of an automatic document feeder. 2. Description of the Related Art A method of exposing and scanning while being conveyed (document drift reading method) is known.
【０００４】図５は画像形成装置のプラテンガラス１上
部に設置された従来例の原稿自動送り装置の幅広搬送ベ
ルト２部分の構成を示す。FIG. 5 shows a configuration of a wide transport belt 2 of a conventional automatic document feeder installed on the platen glass 1 of an image forming apparatus.
【０００５】幅広搬送ベルト２の内側には、幅広搬送ベ
ルト２とプラテンガラス１が圧接するように、押圧部材
である多数の押圧コロ３が縦横整列するように配置さ
れ、押圧コロ３に依存する搬送力が、原稿Ｐの搬送方向
と垂直な列ごとに集中している。A large number of pressing rollers 3 as pressing members are arranged inside the wide conveying belt 2 such that the wide conveying belt 2 and the platen glass 1 are pressed against each other so as to be vertically and horizontally aligned. The transport force is concentrated on each row perpendicular to the transport direction of the document P.
【０００６】幅広搬送ベルト２は、原稿Ｐとプラテンガ
ラス１の摩擦係数よりも、幅広ベルト２と原稿Ｐとの摩
擦係数の方が大きくなるような性質をもった材質で、幅
広搬送ベルト２と原稿Ｐがスベリなく搬送するようにな
っている。The wide transport belt 2 is made of a material having such a property that the friction coefficient between the wide belt 2 and the document P is larger than the friction coefficient between the document P and the platen glass 1. The document P is conveyed without slippage.
【０００７】なお、押圧コロ３は付勢ばね（コイルスプ
リング）５によって幅広搬送ベルト２のベルト面を押圧
する。The pressing roller 3 presses the belt surface of the wide conveying belt 2 by an urging spring (coil spring) 5.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記従
来例の原稿自動送り装置の場合、プラテンガラス１上の
原稿Ｐが押圧コロ３の位置近傍を通過しているとき（図
６(a) ）と、プラテンガラス１上の原稿Ｐが押圧コロ３
の位置近傍を通過していないとき（図６(b) ）とでは、
原稿Ｐとプラテンガラス１２の表面の摩擦力（摩擦係数
μｐ＝０．２前後）ｆＰよりも幅広搬送ベルト２とプラ
テンガラス１の表面の摩擦力（摩擦係数μＧ＝１．２前
後）ｆＧの方が大きいので、幅広搬送ベルト２によって
搬送されている原稿Ｐの後端が押圧コロ３の位置近傍を
抜ける瞬間負荷（摩擦力差）により、一定速度で駆動さ
れるべき幅広搬送ベルト２に一瞬速度が遅くなるような
速度変動が生じる。そして、この変動が幅広搬送ベルト
２にスベリなく接しながら搬送されている原稿Ｐにまで
影響するため、原稿Ｐの後端が押圧コロ３近傍を抜けた
ときに原稿Ｐの原稿流し読み方式による画像読み取りを
行っていると、その速度変動が生じたときに複写されて
いる画像形成にブレが生じる欠点があった。However, in the case of the above-mentioned conventional automatic document feeder, when the original P on the platen glass 1 passes near the position of the pressing roller 3 (FIG. 6A). The original P on the platen glass 1 is pressed
When the vehicle does not pass near the position (FIG. 6 (b)),
The friction force between the original P and the surface of the platen glass 12 (coefficient of friction μp = approximately 0.2) fP is greater than the friction force between the conveying belt 2 and the surface of the platen glass 1 (coefficient of friction μG = approximately 1.2) fG. Is large, the instantaneous load (difference in frictional force) at which the trailing end of the document P being conveyed by the wide conveyance belt 2 passes near the position of the pressing roller 3 causes the wide conveyance belt 2 to be driven at a constant speed. Speed fluctuations such that the speed becomes slower. Since this variation affects the original P being conveyed while being in contact with the wide conveying belt 2 without slippage, when the rear end of the original P passes through the vicinity of the pressing roller 3, the image of the original P is read by the moving document reading method. When reading is performed, there is a disadvantage that the image formation being copied is blurred when the speed fluctuates.
【０００９】また幅広搬送ベルト２によって搬送されて
いる原稿Ｐの先端が押圧コロ３の位置近傍に進入する瞬
間は、原稿Ｐの後端が押圧コロ３の位置近傍を抜ける時
とは逆に負荷が急に少なくなるので一瞬速度が速くなる
ような速度変動が生じ、このときも複写される画像にブ
レが生じるという欠点があった。At the moment when the leading end of the document P being conveyed by the wide conveying belt 2 enters near the position of the pressing roller 3, the load is opposite to when the rear end of the document P passes near the position of the pressing roller 3. Is suddenly reduced, so that a speed fluctuation occurs such that the speed is instantaneously increased, and at this time, there is a disadvantage that the copied image is blurred.
【００１０】そこで本発明は、上述の如き事情に鑑みて
なされたもので、プラテンガラス上において原稿を搬送
している幅広搬送ベルトの速度変動をなくして複写画像
にブレ生じないようにした原稿自動送り装置を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of the above-described circumstances. It is an object to provide a feeding device.
【００１１】[0011]
【課題を解決するための手段】本発明は、プラテンガラ
ス上で原稿を搬送するための幅広搬送ベルトと、前記幅
広搬送ベルトの内側に前記幅広搬送ベルトを前記プラテ
ンガラスに圧接させるため、搬送方向に対して交わる方
向に複数列設置された押圧部材列と、を有している原稿
自動送り装置において、前記押圧部材列のうちの、前記
原稿の画像読み取り中に、該原稿の先端或は後端が通過
する位置に配置された所定の押圧部材列の中の任意の押
圧部材を、該所定の押圧部材列の他の押圧部材から搬送
方向に所定量離して配置したことを特徴とするものであ
る。According to the present invention, there is provided a wide transport belt for transporting an original on a platen glass, and a transport direction in which the wide transport belt is pressed against the platen glass inside the wide transport belt. An automatic document feeder having a plurality of pressing members arranged in a direction intersecting with the document. An arbitrary pressing member in a predetermined pressing member row arranged at a position where the end passes therethrough is arranged apart from another pressing member in the predetermined pressing member row by a predetermined amount in the transport direction. It is.
【００１２】また本発明は、前記押圧部材が押圧コロで
あり、前記任意の押圧部材の離間量は該押圧コロの半径
程度に設定されたことを特徴とするものである。Further, the present invention is characterized in that the pressing member is a pressing roller, and a separation amount of the arbitrary pressing member is set to a radius of the pressing roller.
【００１３】[0013]
【作用】以上構成に基づき、プラテンガラス上で原稿を
搬送するための幅広搬送ベルトの内側に、搬送方向に対
して交わる方向に複数列設置された押圧部材列により、
幅広搬送ベルトをプラテンガラスに圧接させる。さら
に、押圧部材列のうちの、原稿の画像読み取り中に原稿
の先端或は後端が通過する位置に配置された所定の押圧
部材列の中の任意の押圧部材を、所定の押圧部材列の他
の押圧部材から搬送方向に所定量離して配置することに
より、所定の押圧部材列において原稿突入時及び原稿抜
け時に生ずる負荷を搬送方向に分散する。According to the above construction, a plurality of pressing members arranged in a direction intersecting the conveying direction are provided inside a wide conveying belt for conveying an original on a platen glass.
The wide transport belt is pressed against the platen glass. Further, of the pressing member rows, an arbitrary pressing member in the predetermined pressing member row arranged at a position where the leading end or the rear end of the document passes while reading the image of the document is replaced with the predetermined pressing member row. By arranging the pressing members at a predetermined distance from the other pressing members in the conveying direction, a load generated when a document enters and comes out of a predetermined pressing member row is dispersed in the conveying direction.
【００１４】[0014]
【００１５】[0015]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。 〈実施例１〉図１は、アナログ複写機（画像形成装置）
１０に備えられた本発明の原稿自動送り装置（ＲＤＦ）
１１の全体構成を示す。Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 shows an analog copying machine (image forming apparatus).
Automatic document feeder (RDF) of the present invention provided in 10
11 shows the entire configuration.
【００１６】ＲＤＦ１１は、原稿載置台１２上に積載さ
れている複数枚の原稿Ｐを第１の分離手段１３で１枚ず
つ分離し、給紙手段１５により搬送し、プラテンガラス
１６上の所定の位置に順次積載し、複写機１０内の画像
読み取り部（光学系）１７を矢印Ａ方向に移動して画像
を読み取り、排出手段２５により原稿載置台１２上に再
積載される原稿固定読みモードと、原稿載置台１２上に
積載されている複数枚の原稿Ｐを第２の分離手段２０で
１枚ずつ分離し、給紙手段２１により搬送し、光学系１
７のホームポジション（破線で図示）から距離Ｌの位置
に光学系１７を固定し（プラテンガラス１６のほぼ中央
の位置：押圧コロ２２Ｂと２２Ｃの間に位置する）、プ
ラテンガラス１６上を幅広搬送ベルト２３により一定速
度で搬送される原稿Ｐを搬送中に画像を読み取り、排出
手段２５により原稿載置台１２上に再積載される原稿流
し読みモードとを具備している。The RDF 11 separates a plurality of originals P stacked on the original placing table 12 one by one by a first separating unit 13, conveys the originals P by a paper feeding unit 15, and The document is sequentially loaded at the position, the image reading unit (optical system) 17 in the copying machine 10 is moved in the direction of arrow A to read the image, and the discharge unit 25 reloads the document on the document mounting table 12. The plurality of originals P stacked on the original mounting table 12 are separated one by one by a second separating unit 20 and conveyed by a paper feeding unit 21 to be separated by an optical system 1.
7, the optical system 17 is fixed at a position of a distance L from the home position (shown by a broken line) (a position substantially at the center of the platen glass 16: located between the pressing rollers 22B and 22C), and is widely conveyed on the platen glass 16. An image reading mode is provided in which an image is read while the document P conveyed at a constant speed by the belt 23 is being conveyed, and the discharging means 25 reloads the document P on the document mounting table 12.
【００１７】画像読み取り部１７が原稿Ｐの画像を読み
取っている一方で、給紙デッキ２６に積載されているシ
ート材Ｓが給紙ローラ２７及び分離ローラ対２９によっ
て１枚ずつ分離されてレジストローラ対３０へ搬送され
る。While the image reading section 17 is reading the image of the document P, the sheet materials S stacked on the sheet feeding deck 26 are separated one by one by a sheet feeding roller 27 and a separation roller pair 29, and a registration roller Conveyed to pair 30.
【００１８】その後、シート材Ｓはレジストローラ対３
０により感光ドラム３１上に形成された潜像とのタイミ
ングをとって感光ドラム３１と転写帯電器３２との間へ
送られ、ここで転写帯電器３２により感光ドラム３１上
のトナー像が転写される。Thereafter, the sheet material S is transferred to the registration roller pair 3
0, the toner image is sent between the photosensitive drum 31 and the transfer charger 32 at a timing relative to the latent image formed on the photosensitive drum 31. Here, the toner image on the photosensitive drum 31 is transferred by the transfer charger 32. You.
【００１９】次いで、シート材Ｓは搬送ベルト３３によ
り定着ローラ対３５へ送られ、ここでトナー像の定着処
理がなされ、排紙ローラ対３６によって機外の排紙トレ
イ３７上に排紙される。Next, the sheet material S is sent to a pair of fixing rollers 35 by a conveyor belt 33, where a fixing process of the toner image is performed, and the sheet material S is discharged onto a discharge tray 37 outside the apparatus by a pair of discharge rollers 36. .
【００２０】ＲＤＦ１１の幅広搬送ベルト２３の内側に
は、幅広搬送ベルト２３をプラテンガラス１６に圧接さ
せるため、搬送方向に対して直交する方向に配列された
複数列の押圧コロ列２２Ａ，２２Ｂ，２２Ｃ，２２Ｄが
設置されている。Inside the wide transport belt 23 of the RDF 11, a plurality of pressing roller rows 22A, 22B, 22C arranged in a direction perpendicular to the transport direction to press the wide transport belt 23 against the platen glass 16. , 22D are installed.
【００２１】図２(a) は幅広搬送ベルト２３の内側に設
置された押圧コロ列２２Ａ，２２Ｂ，２２Ｃ，２２Ｄの
構成を示す。FIG. 2A shows the structure of the pressing roller rows 22A, 22B, 22C, 22D installed inside the wide conveying belt 23.
【００２２】各押圧コロ列２２Ａ，２２Ｂ，２２Ｃ，２
２Ｄは４個の押圧コロ３９，４０，４１，４２によって
構成されている。Each pressing roller row 22A, 22B, 22C, 2
2D is constituted by four pressing rollers 39, 40, 41, 42.
【００２３】そして、ここでは、上述の原稿流し読みモ
ードのとき、各押圧コロ列２２Ａ，２２Ｂ，２２Ｃ，２
２Ｄのうちの、画像読み取り中の原稿Ｐの先端と後端が
通過する位置に配置されている押圧コロ列２２Ｂ，２２
Ｃの中の内側に位置する２個の押圧コロ４０，４１を同
押圧コロ列２２Ｂ，２２Ｃの外側に位置する２個の押圧
コロ３９，４２から搬送方向に微小な距離Ｈだけずらせ
た位置に配置している。In this case, in the above-mentioned document flow reading mode, each of the pressing roller rows 22A, 22B, 22C, 2
The pressing roller rows 22B and 22 arranged at positions where the leading edge and the trailing edge of the document P during image reading pass in 2D.
The two pressing rollers 40, 41 located inside C are shifted from the two pressing rollers 39, 42 located outside the same pressing roller rows 22B, 22C by a minute distance H in the transport direction. Have been placed.
【００２４】このようにすると、押圧コロ列２２Ｂの位
置近傍から原稿Ｐの後端が抜けるとき、及び押圧コロ列
２２Ｃの位置近傍に原稿Ｐの先端が進入するときに発生
する負荷が搬送方向に分散される。このため、幅広搬送
ベルト２３の速度は、感光ドラム３１に露光される画像
がブレないレベルの速度変動に抑えられ、画像ブレのな
い画像形成が行える。In this way, when the trailing end of the document P comes out of the vicinity of the row of pressing rollers 22B, and when the leading end of the document P enters near the position of the row of pressing rollers 22C, the load generated in the transport direction. Distributed. For this reason, the speed of the wide conveying belt 23 is suppressed to such a level that the image exposed on the photosensitive drum 31 does not fluctuate, and an image can be formed without image blur.
【００２５】押圧コロ４０，４１と押圧コロ３９，４０
との間の距離Ｈは、実験的に１０mm程度とするのが好ま
しい。直径２０mmの押圧コロを用いた実験では、距離Ｈ
を押圧コロの半径以上とすると、搬送力が不足すると共
に斜行が生じることがあった。また、距離Ｈを押圧コロ
の半径以下とすると、負荷の分散が少なく、幅広搬送ベ
ルト２３に生じる速度変動が大きくなることがあった。The pressing rollers 40, 41 and the pressing rollers 39, 40
Is preferably experimentally set to about 10 mm. In an experiment using a pressing roller having a diameter of 20 mm, the distance H
If is larger than the radius of the pressing roller, the conveying force may be insufficient and skew may occur. Further, when the distance H is equal to or less than the radius of the pressing roller, the dispersion of the load is small, and the speed fluctuation generated in the wide conveying belt 23 may be large.
【００２６】図２(b) は各押圧コロ列２２Ａ，２２Ｂ，
２２Ｃ，２２Ｄにおける押圧力の分布状態を示す。FIG. 2B shows each of the pressing roller rows 22A, 22B,
The distribution state of the pressing force in 22C and 22D is shown.
【００２７】画像読み取り中に、原稿Ｐの後端が抜ける
押圧コロ列２２Ｂの押圧コロ４０，４１の押圧力を、押
圧コロ３９，４２よりも小さくし、原稿Ｐの先端が突入
する押圧コロ列２２Ｃの押圧コロ４０，４１の押圧力を
押圧コロ３９，４２よりも小さくすることにより、図２
(c) に示すように押圧力の急激な変化をなめらかに抑え
ることができる。During the image reading, the pressing force of the pressing rollers 40 and 41 of the pressing roller array 22B from which the rear end of the original P comes off is made smaller than the pressing rollers 39 and 42, and the pressing roller array into which the leading end of the original P enters. By making the pressing force of the pressing rollers 40 and 41 of the 22C smaller than that of the pressing rollers 39 and 42, FIG.
As shown in (c), a rapid change in the pressing force can be suppressed smoothly.
【００２８】なお、原稿Ｐの先端部が押圧コロ列２２Ｃ
の押圧コロ４０，４１の位置にあるときは、原稿Ｐの後
端部が押圧コロ列２２Ｂの押圧コロ３９，４０，４１，
４２に圧接される位置にあるので、原稿Ｐの搬送の信頼
性が損なうことがない。また、原稿Ｐの後端部が押圧コ
ロ列２２Ｂの押圧コロ４０，４１の位置にあるときは、
原稿Ｐの先端部は押圧コロ列２２Ｃの押圧コロ３９，４
０，４１，４２に圧接される位置にあるので、同様に原
稿Ｐの搬送の信頼性を損なうことがない。Note that the leading end of the document P is
Are located at the positions of the pressing rollers 40, 41, the rear end of the document P is pressed by the pressing rollers 39, 40, 41,
Since the document P is located at a position where the document P is pressed, the reliability of conveyance of the document P is not impaired. When the rear end of the document P is located at the position of the pressing rollers 40 and 41 of the pressing roller row 22B,
The leading end of the document P is the pressing rollers 39, 4 of the pressing roller row 22C.
Since it is located at a position where it is pressed against 0, 41, and 42, the reliability of conveyance of the document P is not similarly impaired.
【００２９】押圧コロ列２２Ａ，２２Ｄは画像形成中の
原稿Ｐを押圧しない位置にあるので従来と同様に縦に一
列に並んだ配列をとっている。また、原稿固定読みモー
ド時での原稿Ｐの搬送の信頼性を損なわないことからも
このような配置になっている。 〈実施例２〉 本実施例では、押圧コロ列２２Ａ，２２Ｂ，２２Ｃ，２
２Ｄが画像形成中の原稿Ｐを押圧する位置にある場合、
図３(a) に示すように、押圧コロ列２２Ａ，２２Ｄを押
圧コロ３９，４０，４１，４２で構成し、押圧コロ列２
２Ｂ，２２Ｃを押圧コロ４０，４１で構成している。そ
して押圧コロ列２２Ａ，２２Ｄの押圧コロ４０，４１を
押圧コロ３９，４２から搬送方向に微小な距離Ｈだけず
らせた位置に配置して、押圧力が各押圧コロ列ごとに集
中しないようにしている。Since the pressing roller rows 22A and 22D are located at positions where the document P during image formation is not pressed, the pressing roller rows 22A and 22D are arranged vertically in a line as in the prior art. In addition, the arrangement is such that the reliability of conveyance of the document P in the document fixed reading mode is not impaired. <Embodiment 2> In this embodiment, the pressing roller rows 22A, 22B, 22C, 2
When the 2D is at a position where the original P on which an image is being formed is pressed,
As shown in FIG. 3A, the pressing roller rows 22A and 22D are constituted by pressing rollers 39, 40, 41 and 42, and the pressing roller rows 2
2B and 22C are constituted by pressing rollers 40 and 41. The pressing rollers 40, 41 of the pressing roller rows 22A, 22D are arranged at positions shifted from the pressing rollers 39, 42 by a small distance H in the transport direction so that the pressing force does not concentrate on each pressing roller row. I have.
【００３０】図３(b) は各押圧コロ列２２Ａ，２２Ｂ，
２２Ｃ，２２Ｄの押圧力の分布状態を示す。 〈実施例３〉本実施例では、押圧コロ列２２Ｂ，２２Ｃ
が画像形成中の原稿Ｐを押圧する位置にある場合、図４
に示すように、押圧コロ列２２Ｂ，２２Ｃを搬送方向に
並んだ複数の押圧コロ４０，４１によって構成してい
る。この場合、各押圧コロ４０，４１は搬送方向に交互
に配置され、その間が距離Ｈだけずれている。FIG. 3B shows the pressing roller rows 22A, 22B,
The distribution state of the pressing force of 22C and 22D is shown. <Embodiment 3> In this embodiment, the pressing roller arrays 22B and 22C
Is located at a position where the original P on which an image is being formed is pressed.
As shown in (1), the pressing roller rows 22B and 22C are constituted by a plurality of pressing rollers 40 and 41 arranged in the transport direction. In this case, the pressing rollers 40 and 41 are alternately arranged in the transport direction, and the distance therebetween is shifted by the distance H.
【００３１】このようにすることにより、押圧力が各押
圧コロ列２２Ｂ，２２Ｃに集中しないようにしている。In this manner, the pressing force is prevented from being concentrated on the pressing roller rows 22B and 22C.
【００３２】[0032]
【発明の効果】以上説明したように、本発明の原稿自動
送り装置においては、原稿流し読みモードによる画像読
み取り中の原稿の先端と後端が通過する位置に配置され
ている押圧部材列の中の任意の押圧部材を同押圧部材列
の他の押圧部材から搬送方向に所定量離して配置したの
で原稿突入時及び原稿抜け時に生ずる負荷が搬送方向に
分散する。As described above, according to the automatic document feeder of the present invention, the pressing member array disposed at the position where the leading and trailing ends of the document during the image reading in the document flow mode are passed. Is arranged at a predetermined distance from the other pressing members of the same pressing member row in the conveying direction, so that the load generated when the original enters and comes out is dispersed in the conveying direction.
【００３３】このため、幅広搬送ベルトに生ずる速度変
動が、読み取り画像がブレないレベルに抑えられ、画像
ブレのない画像形成が行える。For this reason, the speed fluctuation occurring in the wide conveying belt is suppressed to a level at which the read image does not blur, and an image can be formed without image blur.
【図１】アナログ複写機（画像形成装置）に備えられる
た本発明の原稿自動送り装置の全体構成を示す縦断側面
図。FIG. 1 is a vertical sectional side view showing the entire configuration of an automatic document feeder of the present invention provided in an analog copying machine (image forming apparatus).
【図２】(a) は同原稿自動送り装置の幅広搬送ベルトの
内側に設置された複数の押圧コロ列の構成を示す平面
図。(b) は同各押圧コロ列における押圧力の分布状態を
示す図。(c) は画像読み取り中の原稿の先端と後端が通
過する位置にある押圧コロ列の各押圧コロの押圧力を変
えた場合の押圧力の分布状態を示す図。FIG. 2A is a plan view showing a configuration of a plurality of pressing roller rows installed inside a wide conveying belt of the automatic document feeder. (b) is a diagram showing a distribution state of the pressing force in each pressing roller row. FIG. 4C is a diagram illustrating a distribution state of the pressing force when the pressing force of each pressing roller of the pressing roller row at the position where the leading edge and the trailing edge of the document pass during the image reading is changed.
【図３】(a) は本発明の実施例２に係る幅広搬送ベルト
の内側に設置された複数の押圧コロ列の構成を示す平面
図。(b) は同各押圧コロ列における押圧力の分布状態を
示す図。。FIG. 3A is a plan view illustrating a configuration of a plurality of pressing roller rows installed inside a wide conveyance belt according to a second embodiment of the present invention. (b) is a diagram showing a distribution state of the pressing force in each pressing roller row. .
【図４】本発明の実施例３に係る幅広搬送ベルトの内側
に設置された複数の押圧コロ列の構成を示す平面図。FIG. 4 is a plan view showing a configuration of a plurality of pressing roller rows installed inside a wide conveying belt according to a third embodiment of the present invention.
【図５】従来例の原稿自動送り装置の幅広搬送ベルトの
内側に設置された複数の押圧コロ列の構成を示す斜視
図。FIG. 5 is a perspective view showing a configuration of a plurality of pressing roller rows installed inside a wide conveyance belt of a conventional automatic document feeder.
【図６】同幅広搬送ベルトによって原稿が搬送されるき
の作用を説明する縦断側面図。FIG. 6 is a vertical sectional side view for explaining the operation when a document is conveyed by the wide conveying belt.
１０ アナログ複写機（画像形成装置） １６ プラテンガラス ２２Ａ，２２Ｂ，２２Ｃ，２２Ｄ 押圧コロ列（押圧
部材列） ２３ 幅広搬送ベルト ３９，４０，４１，４２ 押圧コロ（押圧部
材） Ｐ 原稿Reference Signs List 10 analog copying machine (image forming apparatus) 16 platen glass 22A, 22B, 22C, 22D press roller row (press member row) 23 wide transport belt 39, 40, 41, 42 press roller (press member) P original
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B65H 5/02 G03G 15/00 107Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) B65H 5/02 G03G 15/00 107
Claims (3)
の幅広搬送ベルトと、前記幅広搬送ベルトの内側に、前
記幅広搬送ベルトを前記プラテンガラスに圧接させるた
め、搬送方向に対して交わる方向に複数列設置された押
圧部材列と、を有している原稿自動送り装置において、 前記押圧部材列のうちの、前記原稿の画像読み取り中
に、該原稿の先端或は後端が通過する位置に配置された
所定の押圧部材列の中の任意の押圧部材を、該所定の押
圧部材列の他の押圧部材から搬送方向に所定量離して配
置したことを特徴とする原稿自動送り装置。1. A wide transport belt for transporting an original on a platen glass , and a plurality of wide transport belts inside the wide transport belt in a direction intersecting with the transport direction to press the wide transport belt against the platen glass. An automatic document feeder having an array of pressing members, wherein an image of the original is being read during the reading of the pressing member array.
The document is arranged at a position where the leading or trailing edge of the document passes .
Any of the pressing member in a predetermined pressing member column, automatic document feeder, characterized in that disposed apart a predetermined amount in the transport direction from the other pressing member of the predetermined press <br/> member column.
意の押圧部材の離間量は該押圧コロの半径程度に設定さ
れたことを特徴とする請求項１記載の原稿自動送り装
置。Wherein said pressing member is a pressing roller, said optional spacing amount of the pressing member is an automatic document feeder according to claim 1, wherein the set to a radius of about the pressing rollers.
位置に配置されている前記押圧部材列の中の搬送方向上
流側に位置する押圧部材と搬送方向下流側に位置する押
圧部材では、搬送方向上流側に位置する押圧部材の押圧
力が小さく設定され、画像読み取り中の原稿の後端が通
過する位置に配置されている前記押圧部材列の中の搬送
方向上流側に位置する押圧部材と搬送方向下流側に位置
する押圧部材では、搬送方向上流側に位置する押圧部材
の押圧力が大きく設定されていることを特徴とする請求
項１記載の原稿自動送り装置。3. A pressing member located on the upstream side in the conveying direction and a pressing member located on the downstream side in the conveying direction in the pressing member row arranged at a position through which the leading end of the document during image reading passes. The pressing force of the pressing member located on the upstream side in the direction is set to be small, and the pressing member located on the upstream side in the transport direction in the pressing member row arranged at the position where the rear end of the document being read passes. 2. The automatic document feeder according to claim 1, wherein a pressing force of the pressing member located on the upstream side in the transport direction is set to be large in the pressing member located on the downstream side in the transport direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4265413A JP2866538B2 (en) | 1992-09-07 | 1992-09-07 | Automatic document feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4265413A JP2866538B2 (en) | 1992-09-07 | 1992-09-07 | Automatic document feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0687547A JPH0687547A (en) | 1994-03-29 |
| JP2866538B2 true JP2866538B2 (en) | 1999-03-08 |
Family
ID=17416821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4265413A Expired - Fee Related JP2866538B2 (en) | 1992-09-07 | 1992-09-07 | Automatic document feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2866538B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711301B1 (en) * | 2004-05-07 | 2007-04-25 | 가부시키가이샤 리코 | Conveyor belt, sheet feeding device, and image forming apparatus including the sheet feeding device that stably conveys original document |
-
1992
- 1992-09-07 JP JP4265413A patent/JP2866538B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0687547A (en) | 1994-03-29 |
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