JP4272584B2 - Document reading apparatus and image forming apparatus using the same - Google Patents

Document reading apparatus and image forming apparatus using the same Download PDF

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JP4272584B2
JP4272584B2 JP2004143277A JP2004143277A JP4272584B2 JP 4272584 B2 JP4272584 B2 JP 4272584B2 JP 2004143277 A JP2004143277 A JP 2004143277A JP 2004143277 A JP2004143277 A JP 2004143277A JP 4272584 B2 JP4272584 B2 JP 4272584B2
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document
inclined surface
reading apparatus
document reading
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JP2005328228A (en
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正利 榊谷
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Ricoh Co Ltd
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Description

本発明は、複写機、スキャナ、ファクシミリ等に用いられるシートスルー方式の原稿読み取り装置及びこれを用いた画像形成装置に関する。   The present invention relates to a sheet-through type document reading apparatus used for a copying machine, a scanner, a facsimile, and the like, and an image forming apparatus using the same.

シートスルー読み取り機能を有する原稿読み取り装置やこれを用いた画像形成装置においては、コンタクトガラス上に原稿を搭載して照明用光源により光を照射し、画像読み取り手段(キャリッジ等と称する)を停止させた状態のまま原稿を搬送して読み取る方式と、キャリッジを移動走査して読み取る読み取り方式があるが、どちらの読み取り方式においても読み取り部位におけるゴミ等の存在が問題になる。   In an original reading apparatus having a sheet-through reading function and an image forming apparatus using the same, an original is mounted on a contact glass, light is irradiated by an illumination light source, and image reading means (referred to as a carriage or the like) is stopped. There are a method of conveying and reading a document while it is in a state of being read, and a reading method of reading a document by moving and scanning the carriage. In both reading methods, the presence of dust or the like at the reading portion becomes a problem.

シートスルー読み取りを行う場合、コンタクトガラス上に例えば修正液やボールペンの余剰インクが点状のゴミとして存在すると、読み取り部のキャリッジを固定している場合には、これら付着したゴミが副走査方向に伸びた黒スジ画像として出力される。このようなゴミの画像を含む読み取り画像は、もちろん原稿画像上には無いデータであり、当然にクレームの原因となる。   When performing sheet-through reading, for example, if correction liquid or excess ink from a ballpoint pen is present as dot-like dust on the contact glass, if the carriage of the reading unit is fixed, these attached dust will be moved in the sub-scanning direction. Output as an extended black streak image. The read image including such a dust image is, of course, data that does not exist on the document image, and naturally causes a complaint.

この問題を解消するための手段として、読み取り部のコンタクトガラスの表面にゴミ等が付着するのを防ぐための処理を施したり、読み取り部の位置をゴミの付着の少ないところにしたりする等の方法が提案されているが、既存の方法では読み取り部にゴミが付着してしまった場合に生じる不具合を解消することはできない。そのためシートスルー方式の原稿読み取り装置においては、上述のような黒スジ画像が慢性的なクレーム原因となっており、簡易な方法で上記クレームを低減できる構造の開発が望まれていた。   As a means for solving this problem, a method for preventing dust from adhering to the surface of the contact glass of the reading unit, or a method of reducing the position of the reading unit to a point where dust does not adhere However, the existing method cannot solve the problem that occurs when dust adheres to the reading unit. Therefore, in the sheet-through type document reading apparatus, the black streak image as described above is a cause of chronic complaints, and it has been desired to develop a structure that can reduce the aforementioned complaints by a simple method.

また従来、シートスルー読み取り機能を有する原稿読み取り装置やこれを用いた画像形成装置においては、厚手で剛性の高い原稿を通紙したときに搬送部の隙間が狭いため、そこで原稿がとまってしまう可能性があり、これも解決が望まれていた。   Conventionally, in an original reading apparatus having a sheet-through reading function and an image forming apparatus using the same, since the gap of the conveyance unit is narrow when a thick and highly rigid original is passed, the original may be stopped there. There was a possibility, and this was also desired to be solved.

本発明は、上述した従来の問題点にかんがみ、原稿読み取り開始前に原稿に付着してともに搬送されてきたゴミ等を除去可能とした原稿読み取り装置及びこれを用いた画像形成装置を提供することを目的とする。   SUMMARY OF THE INVENTION In view of the above-described conventional problems, the present invention provides an original reading apparatus capable of removing dust or the like that has adhered to and conveyed together with the original before starting the original reading, and an image forming apparatus using the same. With the goal.

本発明の請求項1に係る原稿読み取り装置は、シート状の原稿を搬送しつつ原稿面を読み取るシートスルー方式の原稿読み取り装置において、原稿読み取り部の原稿搬送方向上流側のガイド板が、搬送する原稿の原稿面に付着したゴミや、修正液やボールペンの余剰インクを掻き落とす掻き落とし形状部を備え、該掻き落とし形状部をガイド板に着脱可能とし、該掻き落とし形状部に対して出没する方向に可動のガイド部材を備え、該掻き落とし形状部と該ガイド部材がそれぞれ傾斜面を有し、これら傾斜面が原稿搬送方向上流側に向かって広く、原稿搬送方向下流側に向かって狭まる搬送路形状を形成し、前記掻き落とし形状部の前記傾斜面の頂部を前記ガイド部材の傾斜面の途中部位に対向して位置させ、前記掻き落とし形状部の傾斜面は原稿の搬送に対して抵抗にはほとんどならないが、原稿面に付着したゴミや、修正液やボールペンの余剰インクを該傾斜面との摺接や該傾斜面の頂部で引っ掻くことにより除去する構成としたことを特徴とする。
The document reading device according to claim 1 of the present invention is a sheet-through type document reading device that reads a document surface while conveying a sheet-like document, and a guide plate on the upstream side of the document reading direction of the document reading unit conveys the document. It has a scraping shape part that scrapes off dust adhering to the document surface, correction liquid, and excess ink from the ballpoint pen. The scraping shape part can be attached to and detached from the guide plate, and appears and disappears from the scraping shape part. The scraper-shaped portion and the guide member each have inclined surfaces, and the inclined surfaces are widened toward the upstream side in the document conveying direction and narrowed toward the downstream side in the document conveying direction. forming a road shape, the top of the inclined surface of the scraper-shaped portion is located opposite the middle part of the inclined surface of the guide member, the inclined surface of the scraping-shaped portion Although it hardly resists the conveyance of the original, it is configured to remove dust adhering to the original surface, correction liquid, and excess ink of the ballpoint pen by sliding on the inclined surface or scratching at the top of the inclined surface. It is characterized by that.

請求項2に係るものは、請求項1の原稿読み取り装置において、前記き落とし形状部は、ガイド板に取り付ける取付基部と、この取付基部から、搬送する原稿の原稿面側に突出する凸形状を有し、該凸形状に前記傾斜面を有し、該傾斜面が、原稿搬送方向上流側から下流側へ向かうにつれて上方へ突出してゆく傾斜をなすことを特徴とする。
Those according to claim 2, in document reading apparatus according to claim 1, wherein the take-out drop-shaped portion includes a mounting base for mounting the guide plate, a convex shape protruding from the mounting base, the original surface side of the document conveying The convex surface has the inclined surface, and the inclined surface is inclined so as to protrude upward from the upstream side to the downstream side in the document conveying direction .

請求項3に係るものは、請求項1または2の原稿読み取り装置において、前記ガイド部材の傾斜面が、原稿搬送方向上流側から下流側へ向かうにつれて前記原稿の原稿面側へ突出する形状を有することを特徴とする。
According to a third aspect of the present invention, in the document reading device according to the first or second aspect , the inclined surface of the guide member has a shape protruding toward the document surface side of the document as it goes from the upstream side to the downstream side in the document transport direction. It is characterized by that.

請求項4に係るものは、請求項1ないし3のいずれかの原稿読み取り装置において、前記き落とし形状部と前記ガイド部材を、これらより原稿搬送方向下流側に位置する原稿読取部の上流側原稿搬送ローラより、上流側に配置することを特徴とする。
Those according to claim 4, in any of the document reading apparatus of claims 1 to 3, the guide member and the take--out drop-shaped section, the upstream side of the document reading portion located from the document conveying direction downstream side thereof Ri by original conveying rows La, characterized in that arranged on the upper stream side.

請求項5に係るものは、請求項1ないし3のいずれかの原稿読み取り装置において、前記掻き落とし形状部を、付着する白色の修正液及び黒色のインクが目立つ色を有するものとして構成したことを特徴とする。
According to a fifth aspect of the present invention, in the document reading apparatus according to any one of the first to third aspects, the scraped-off shape portion is configured to have a color in which the white correction liquid and the black ink to be attached are conspicuous. Features.

請求項6に係る画像形成装置は、請求項1ないし5のいずれかの原稿読み取り装置を有することを特徴とする。
An image forming apparatus according to a sixth aspect includes the document reading device according to any one of the first to fifth aspects.

本発明は、シートスルー方式の原稿読み取り時に、原稿面に付着したゴミや、修正液やボールペンの余剰インクを掻き落とし、読み取り部がそれらにより汚れず、読み取り部の汚れに起因する黒スジの発生とそれに対するクレームを、簡易な構造で低減させ得る。
The present invention, when the document reading of the sheet-through method, and dirt adhering to the document surface, scrapes excess in click of correction fluid or ballpoint pen, the reading unit is not soiled by their, black streaks due to contamination of the reading unit Occurrence and claims against it can be reduced with a simple structure.

また、き落とし形状部だけを交換できる他、掻き落とした修正液やインクが目立ち、清掃が容易になる。
Another can exchange only the take-out drop-shaped section, noticeable correction fluid and ink scraped facilitates cleaning.

以下本発明を実施するための最良の形態を、図に示す実施例を参照して説明する。   The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings.

図1は、本発明の実施対象として、シートスルー読み取り機能を有する原稿読み取り装置の一例としての自動原稿搬送装置(ADF)とこれを搭載した画像形成装置を示す概略断面図である。なお、図示の自動原稿搬送装置は単なる一例であって、後述するシートスルー読み取り機能を有する原稿読み取り装置であればどのようなものでも本発明を適用できる。   FIG. 1 is a schematic cross-sectional view showing an automatic document feeder (ADF) as an example of a document reading apparatus having a sheet-through reading function and an image forming apparatus equipped with the automatic document conveying apparatus (ADF). Note that the illustrated automatic document feeder is merely an example, and the present invention can be applied to any document reading device having a sheet-through reading function described later.

図示の画像形成装置は主に、原稿を読み取る読み取りユニット11、画像を形成する画像形成部12、自動原稿搬送装置(ADF)13、ADF13から送り出される原稿をスタックする原稿排紙トレイ14、給紙カセット15ないし18を備える給紙部19、記録用紙をスタックする排紙部(原稿排紙トレイ20)により構成してある。   The illustrated image forming apparatus mainly includes a reading unit 11 that reads a document, an image forming unit 12 that forms an image, an automatic document feeder (ADF) 13, a document discharge tray 14 that stacks documents sent from the ADF 13, and a paper feed The paper feed unit 19 includes cassettes 15 to 18 and a paper discharge unit (original discharge tray 20) for stacking recording paper.

そして、ADF13の原稿台21上に原稿Dをセットして図示せぬ操作部での操作、例えばプリントキーの押下操作をすると、最上位の原稿Dがピックアップローラ22の回転により矢印B1方向へ送り出され、原稿搬送ベルト23の回転により、画像読み取りユニット11に固定されたコンタクトガラス24上へ給送され、そこで停止する。コンタクトガラス24上に載置された原稿Dの画像は、画像形成部12とコンタクトガラス24の間に位置する読み取り装置25によって読み取る。読み取り装置25は、コンタクトガラス24上の原稿Dを照明する光源26、原稿画像を結像する光学系27、原稿画像を結像させるCCD等からなる光電変換素子28等を有している。画像読み取り終了後、原稿Dを原稿搬送ベルト23の回転により矢印B2方向へ搬送して原稿排紙トレイ14上へ排出する。このように、原稿Dを1枚ずつコンタクトガラス24上へ給送して原稿画像を画像読み取りユニット1によって読み取る。   Then, when the document D is set on the document table 21 of the ADF 13 and an operation on an operation unit (not shown), for example, a press operation of a print key is performed, the uppermost document D is sent out in the direction of the arrow B1 by the rotation of the pickup roller 22. Then, by the rotation of the document conveying belt 23, the paper is fed onto the contact glass 24 fixed to the image reading unit 11, and stops there. The image of the document D placed on the contact glass 24 is read by a reading device 25 located between the image forming unit 12 and the contact glass 24. The reading device 25 includes a light source 26 that illuminates the document D on the contact glass 24, an optical system 27 that forms an image of the document, a photoelectric conversion element 28 that includes a CCD that forms an image of the document, and the like. After the image reading is completed, the document D is transported in the direction of the arrow B2 by the rotation of the document transport belt 23 and discharged onto the document discharge tray 14. In this way, the document D is fed one by one onto the contact glass 24 and the document image is read by the image reading unit 1.

一方、画像形成部12の内部には、像担持体である感光体30が配置してある。感光体30は、図において時計方向に回転駆動し、帯電装置31によって表面を所定の電位に帯電させる。また、書き込みユニット32からは、読み取り装置25によって読み取った画像情報に応じて光変調したレーザ光Lを照射し、帯電させた感光体30の表面をこのレーザ光Lで露光し、これによって感光体30の表面に静電潜像を形成する。この静電潜像は、現像装置33を通るとき、対向する転写装置34によって感光体30と転写装置34の間に給送された記録媒体Pに転写する。トナー像転写後の感光体30の表面は、クリーニング装置35によって清掃する。   On the other hand, inside the image forming unit 12, a photoconductor 30 as an image carrier is disposed. The photosensitive member 30 is driven to rotate clockwise in the drawing, and the surface is charged to a predetermined potential by the charging device 31. Further, the writing unit 32 emits a laser beam L that is light-modulated in accordance with image information read by the reading device 25, and the surface of the charged photoreceptor 30 is exposed with the laser beam L, whereby the photoreceptor is exposed. An electrostatic latent image is formed on the surface 30. When the electrostatic latent image passes through the developing device 33, the electrostatic latent image is transferred to the recording medium P fed between the photosensitive member 30 and the transfer device 34 by the opposing transfer device 34. The surface of the photoconductor 30 after the toner image is transferred is cleaned by a cleaning device 35.

画像形成部2の下部に配置した複数の給紙カセット15ないし18には、紙等の記録媒体Pを収容してあり、いずれかの給紙カセット15ないし18から記録媒体Pを矢印B3方向へ送り出し、その記録媒体Pの表面に、上述のように感光体30の表面に形成したトナー像を転写する。次に、記録媒体Pを矢印B4で示すように画像形成部2内の定着装置36を通し、熱と圧力の作用によって記録媒体Pの表面に転写されたトナー像を定着させる。定着装置36を通った記録媒体Pを排出ローラ対37によって搬送し、矢印B5で示すように原稿排紙トレイ20へ排出し、スタックする。   A plurality of paper feed cassettes 15 to 18 arranged in the lower part of the image forming unit 2 contain recording media P such as paper, and the recording media P is fed from any of the paper feed cassettes 15 to 18 in the direction of arrow B3. The toner image formed on the surface of the photoreceptor 30 as described above is transferred onto the surface of the recording medium P. Next, the recording medium P is passed through the fixing device 36 in the image forming unit 2 as indicated by an arrow B4, and the toner image transferred onto the surface of the recording medium P by the action of heat and pressure is fixed. The recording medium P that has passed through the fixing device 36 is conveyed by the discharge roller pair 37, discharged to the document discharge tray 20 as indicated by an arrow B5, and stacked.

図2は、本発明の一実施例における原稿読み取り部の断面概略図である。図中51は原稿読み取り部で、図1の装置では光学系27のコンタクトガラス24に対する光軸X上に位置する部位である。また図中52は原稿搬送用のローラ、53はそれに対向する加圧ローラ、54は原稿搬送方向で下流側に位置する原稿搬送用のローラ、55はそれに対向する加圧ローラ、56は白圧板、57は角パイプ材、58はスプリング、59はガイド板、70はき落とし形状部である凸形状部である。
FIG. 2 is a schematic cross-sectional view of a document reading unit according to an embodiment of the present invention. In the figure, reference numeral 51 denotes an original reading unit, which is a part located on the optical axis X with respect to the contact glass 24 of the optical system 27 in the apparatus of FIG. In the figure, 52 is a document conveying roller, 53 is a pressure roller facing it, 54 is a document conveying roller located downstream in the document conveying direction, 55 is a pressure roller facing it, and 56 is a white pressure plate. , 57 square pipe member 58 is spring, 59 guide plate 70 is a convex portion which is the take-out drop-shaped section.

凸形状部70は、原稿読み取り部51よりも原稿搬送方向上流側でガイド板59に取り付けて形成してあり、図示しない搬送原稿の原稿面に付着した修正液やボールペンの余剰インク等を掻き落とす掻き落とし形状部となる。凸形状部70は、ガイド板59に形成された取付穴に嵌め込んで取り付けられ、平板状の取付部71とこの取付部から上方向け突出形成された凸部72とからなる。前記凸部72は搬送原稿の原稿面(図の例では下面)に向かって突出する形状を有し、かつ原稿搬送方向上流側から下流側へ向かうにつれて上方へ突出してゆく傾斜面Sをなす。   The convex portion 70 is formed by being attached to the guide plate 59 on the upstream side in the document conveyance direction with respect to the document reading unit 51, and scrapes off the correction liquid adhering to the document surface of the conveyed document (not shown), excess ink of the ballpoint pen, and the like. A scraped shape. The convex portion 70 is attached by being fitted into an attachment hole formed in the guide plate 59, and includes a flat plate-like attachment portion 71 and a convex portion 72 formed to project upward from the attachment portion. The convex portion 72 has a shape that protrudes toward the original surface (lower surface in the illustrated example) of the conveyed original, and forms an inclined surface S that protrudes upward from the upstream side to the downstream side in the original conveying direction.

また、本例では上側のガイド板59にはガイド部材61をスプリング62で下方へ突出付勢して可動に設けてある。このガイド部材61は、凸形状部70に対して出没する方向に可動であり、また凸形状部70と同様に、原稿搬送方向上流側から下流側へ向かうにつれて下方へ突出してゆく傾斜面S’をなす。また、凸形状部70の頂部は傾斜面S’の途中部位に対向している。   In this example, a guide member 61 is movably provided on the upper guide plate 59 by a spring 62 so as to protrude downward. The guide member 61 is movable in a direction in which it protrudes and protrudes with respect to the convex portion 70, and similarly to the convex portion 70, the inclined surface S ′ that protrudes downward from the upstream side to the downstream side in the document transport direction. Make. Further, the top portion of the convex portion 70 is opposed to the middle portion of the inclined surface S ′.

そして、本例では凸形状部70は付着した白色の修正液や黒色のボールペンインクが目立つ色、例えば赤、緑で構成されている。なお、この凸形状部70の色彩は任意に選択できる。   And in this example, the convex-shaped part 70 is comprised with the color which the white correction liquid and black ball-point pen ink which adhered have, for example, red and green. The color of the convex portion 70 can be arbitrarily selected.

したがって、ローラ52、53を介して搬送された原稿は、その先端が傾斜面Sを比較的スムーズに登っていき、凸形状部70の頂部を乗り越えて原稿読み取り部51に至る。   Therefore, the document conveyed via the rollers 52 and 53 has its leading end climbing the inclined surface S relatively smoothly, and passes over the top of the convex portion 70 to reach the document reading unit 51.

すなわち傾斜面Sは搬送に対して抵抗にはほとんどならないが、原稿面に付着した修正液やボールペンの余剰インク等は、傾斜面Sとの摺接や、凸形状部の頂部で引っかかれることにより、原稿読み取り部51へ至る前に除去され得る。   That is, the inclined surface S hardly resists the conveyance, but the correction liquid adhering to the document surface, the excess ink of the ballpoint pen, etc. are brought into sliding contact with the inclined surface S or pulled by the top of the convex portion. It can be removed before reaching the document reading unit 51.

原稿読み取り部51に至った原稿は、その先端側からスプリング58の付勢力によってコンタクトガラス24側へ押し付け付勢されている白圧板56で上方から押さえられつつ移動し(通紙方向を図中に矢印で示す)、原稿面の内容を読み取られ、ローラ54、55を介して原稿読み取り部51から脱する。   The document that has reached the document reading unit 51 moves while being pressed from above by a white pressure plate 56 that is pressed and urged toward the contact glass 24 by the urging force of the spring 58 from the leading end side (the sheet passing direction in the figure). The content of the original surface is read, and is removed from the original reading unit 51 via the rollers 54 and 55.

本例によれば、図3に示すように、凸形状部60をガイド板59に直接形成した場合、使用による凸形状部60の摩耗による変形(図3(b)に符号60b、(c)に60cで示した)時に、ガイド板59全体を交換しなければならなくなる手間を解消する。即ち本例では、凸形状部70だけを交換するだけで、掻き落とし能力を回復させることができる。また、本例では、凸形状部70の色彩を赤または緑にしているため、原稿表面から掻き取った白色の修正液や黒色インクが目立ち、凸形状部70の清掃が容易となる。   According to this example, as shown in FIG. 3, when the convex portion 60 is formed directly on the guide plate 59, deformation due to wear of the convex portion 60 due to use (reference numerals 60b and (c) in FIG. 3B). This eliminates the trouble of having to replace the entire guide plate 59 at the time indicated by 60c in FIG. That is, in this example, the scraping ability can be recovered only by exchanging only the convex portion 70. In this example, since the color of the convex portion 70 is red or green, white correction liquid or black ink scraped off from the document surface is conspicuous, and the convex portion 70 is easily cleaned.

また、本例では、厚くない原稿を通紙する際は図示のようにガイド部材61がスプリング62で付勢されて下方へ突出しており、通紙経路を狭いままに保っているが、厚手で剛性の高い原稿を通紙したときには、ガイド部材61がスプリング62の付勢力に抗して上昇し、搬送部の隙間が広くなる(スプリング62の付勢力はそのような動作が可能なように適宜設定する)。したがって、原稿搬送部である通紙路が狭いために原稿がとまってしまうことはない。   Further, in this example, when passing a document that is not thick, the guide member 61 is biased by a spring 62 and protrudes downward as shown in the figure, and the paper passing path is kept narrow. When a highly rigid document is passed, the guide member 61 rises against the urging force of the spring 62, and the clearance between the conveying portions is widened (the urging force of the spring 62 is appropriately set so that such an operation is possible). Set). Accordingly, the original does not stop because the paper passing path which is the original conveying section is narrow.

図4は、本発明の他の実施例における原稿読み取り部の断面概略図である。この例は、凸形状部70及びガイド部材61をローラ52ほとんどの構成は図3の例と同様であるが、凸形状部70及びガイド部材61を原稿読取部の上流側原稿搬送ローラ82,83より上流に側に配置するようにしている。このため画像読み取り部51が上流側の搬送ローラ82,83と下流側の原稿搬送ローラ54,55に挟まれて配置されるため、原稿後端の凸形状部70通過時のバタつきが防止され、特にCIS(密着型イメージセンサ)を用いるとき発生しがちな読み取り画像の乱れが減少する。 FIG. 4 is a schematic cross-sectional view of a document reading unit according to another embodiment of the present invention. In this example, the convex portion 70 and the guide member is 61 to roller 52 in most structures are the same as the example of FIG. 3, the convex portion 70 and the guide member 61 upstream document conveyance low la 8 2 of the document reading section , 83 on the upstream side. For this reason, since the image reading unit 51 is disposed between the upstream conveying rollers 82 and 83 and the downstream document conveying rollers 54 and 55, the image reading unit 51 is prevented from fluttering when passing through the convex portion 70 at the trailing edge of the document. In particular, the disturbance of the read image that tends to occur when using a CIS (contact image sensor) is reduced.

本発明の実施対象となる原稿読み取り装置と画像形成装置を示す概略断面図である。1 is a schematic cross-sectional view illustrating an original reading apparatus and an image forming apparatus that are targets of implementation of the present invention. 本発明の一実施例における原稿読み取り部の拡大断面概略図である。FIG. 3 is an enlarged schematic cross-sectional view of a document reading unit according to an embodiment of the present invention. 本発明の作用を説明する図である。It is a figure explaining the effect | action of this invention. 本発明の他の実施例における原稿読み取り部の断面概略図であるFIG. 6 is a schematic cross-sectional view of a document reading unit according to another embodiment of the present invention.

符号の説明Explanation of symbols

1・・・ユニット
2・・・画像形成部
5・・・ローラ
11・・・読み取りユニット
12・・・画像形成部
13・・・自動原稿搬送装置(ADF)
14・・・原稿排紙トレイ
15・・・給紙カセット
18・・・給紙カセット
19・・・給紙部
20・・・排紙トレイ
21・・・原稿台
22・・・ピックアップローラ
23・・・原稿搬送ベルト
24・・・コンタクトガラス
25・・・読み取り装置
26・・・光源
27・・・光学系
28・・・光電変換素子
30・・・感光体
31・・・帯電装置
32・・・書き込みユニット
33・・・現像装置
34・・・転写装置
35・・・クリーニング装置
36・・・定着装置
37・・・排出ローラ対
51・・・原稿読み取り部
52、53・・・ローラ
54、55・・・ローラ
56・・・白圧板
58・・・スプリング
59・・・ガイド板
60・・・凸形状部
61・・・ガイド部材
62・・・スプリング
70・・・凸形状部
71・・・取付部
72・・・凸部
82,83・・・搬送ローラ
D・・・原稿
L・・・レーザ光
P・・・記録媒体
S・・・傾斜面
S’・・・傾斜面
X・・・光軸
DESCRIPTION OF SYMBOLS 1 ... Unit 2 ... Image forming part 5 ... Roller 11 ... Reading unit 12 ... Image forming part 13 ... Automatic document feeder (ADF)
14 ... Document discharge tray 15 ... Paper feed cassette 18 ... Paper feed cassette 19 ... Paper feed unit 20 ... Paper discharge tray 21 ... Document base 22 ... Pickup roller 23 .... Document transport belt 24 ... contact glass 25 ... reading device 26 ... light source 27 ... optical system 28 ... photoelectric conversion element 30 ... photoconductor 31 ... charging device 32 ... Writing unit 33 ... developing device 34 ... transfer device 35 ... cleaning device 36 ... fixing device 37 ... discharge roller pair 51 ... original reading unit 52, 53 ... roller 54, 55 ... Roller 56 ... White pressure plate 58 ... Spring 59 ... Guide plate 60 ... Convex shaped part 61 ... Guide member 62 ... Spring 70 ... Convex shaped part 71 ...・ Mounting part 72 ... convex part 82 83 ... conveying rollers D ... original L ... laser light P ... recording medium S ... inclined surface S '... inclined surface X ... optical axis

Claims (6)

シート状の原稿を搬送しつつ原稿面を読み取るシートスルー方式の原稿読み取り装置において、原稿読み取り部の原稿搬送方向上流側のガイド板が、搬送する原稿の原稿面に付着したゴミや、修正液やボールペンの余剰インクを掻き落とす掻き落とし形状部を備え、該掻き落とし形状部をガイド板に着脱可能とし、該掻き落とし形状部に対して出没する方向に可動のガイド部材を備え、該掻き落とし形状部と該ガイド部材がそれぞれ傾斜面を有し、これら傾斜面が原稿搬送方向上流側に向かって広く、原稿搬送方向下流側に向かって狭まる搬送路形状を形成し、前記掻き落とし形状部の前記傾斜面の頂部を前記ガイド部材の傾斜面の途中部位に対向して位置させ、前記掻き落とし形状部の傾斜面は原稿の搬送に対して抵抗にはほとんどならないが、原稿面に付着したゴミや、修正液やボールペンの余剰インクを該傾斜面との摺接や該傾斜面の頂部で引っ掻くことにより除去する構成としたことを特徴とする原稿読み取り装置。
In a sheet-through type document reading apparatus that reads a document surface while conveying a sheet-like document, a guide plate on the upstream side in the document conveyance direction of the document reading unit has dust, correction liquid, or the like adhering to the document surface of the document to be conveyed. It has a scraping shape part that scrapes off excess ink of the ballpoint pen. Each of the guide member and the guide member has an inclined surface, and the inclined surface is widened toward the upstream side in the document conveying direction and narrowed toward the downstream side in the document conveying direction. the top of the inclined surface is positioned to face the middle portion of the inclined surface of the guide member, the inclined surface of the scraper-shaped portion guess if little to resistance to conveyance of the document But the document reading apparatus characterized by having a configuration that is removed by scratching or dust adhering to the document surface, the excess ink of the correction fluid and a ballpoint pen, the top of the sliding contact and the inclined surface of the inclined surface.
請求項1の原稿読み取り装置において、前記き落とし形状部は、ガイド板に取り付ける取付基部と、この取付基部から、搬送する原稿の原稿面側に突出する凸形状を有し、該凸形状に前記傾斜面を有し、該傾斜面が、原稿搬送方向上流側から下流側へ向かうにつれて上方へ突出してゆく傾斜をなすことを特徴とする原稿読み取り装置。 In document reading apparatus according to claim 1, wherein the take-out drop-shaped portion includes a mounting base for mounting the guide plate, from the mounting base has a convex shape protruding on the original surface of the original to be conveyed, a convex shape An original reading apparatus comprising the inclined surface, wherein the inclined surface is inclined to protrude upward as it goes from the upstream side to the downstream side in the document conveying direction . 請求項1または2の原稿読み取り装置において、前記ガイド部材の傾斜面が、原稿搬送方向上流側から下流側へ向かうにつれて前記原稿の原稿面側へ突出する形状を有することを特徴とする原稿読み取り装置。 3. The document reading apparatus according to claim 1 , wherein the inclined surface of the guide member has a shape protruding toward the document surface side of the document as it goes from the upstream side to the downstream side in the document transport direction. . 請求項1ないし3のいずれかの原稿読み取り装置において、前記き落とし形状部と前記ガイド部材を、これらより原稿搬送方向下流側に位置する原稿読取部の上流側原稿搬送ローラより、上流側に配置することを特徴とする原稿読み取り装置。 In any of the document reading apparatus of claims 1 to 3, the guide member and the take--out drop-shaped section, Ri by upstream document conveyance row La of the document reading portion located from the document conveying direction downstream side thereof, the upper An original reading apparatus arranged on the flow side . 請求項1ないし3のいずれかの原稿読み取り装置において、前記掻き落とし形状部を、付着する白色の修正液及び黒色のインクが目立つ色を有するものとして構成したことを特徴とする原稿読み取り装置。 4. The document reading apparatus according to claim 1 , wherein the scraped-off shape portion is configured to have a color in which the white correction liquid and the black ink adhering are conspicuous . 請求項1ないし5のいずれかの原稿読み取り装置を有することを特徴とする画像形成装置。
An image forming apparatus comprising the document reading device according to claim 1.
JP2004143277A 2004-05-13 2004-05-13 Document reading apparatus and image forming apparatus using the same Expired - Fee Related JP4272584B2 (en)

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JP2010190979A (en) * 2009-02-16 2010-09-02 Fuji Xerox Co Ltd Original feeder and image reader
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