JP2022083242A - Document reading device and image forming apparatus including the same - Google Patents

Document reading device and image forming apparatus including the same Download PDF

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JP2022083242A
JP2022083242A JP2020194577A JP2020194577A JP2022083242A JP 2022083242 A JP2022083242 A JP 2022083242A JP 2020194577 A JP2020194577 A JP 2020194577A JP 2020194577 A JP2020194577 A JP 2020194577A JP 2022083242 A JP2022083242 A JP 2022083242A
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document
elastic member
cover
mounting table
reading device
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英伸 万代
Hidenobu Bandai
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Sharp Corp
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Abstract

To obtain a read image that has sufficiently prevented the occurrence of interference fringes during reading of a document even if the document is a photograph document or a document having glossiness.SOLUTION: A document reading device comprises: a document placement platen that has a transparent document placement unit on which a document is placed and a document reading unit that reads the document placed on the document placement unit; and a document cover that is rotatably supported on the document placement platen centered on a rotation spindle between a closing position for covering the document placement unit and an opening position for opening the document placement unit. The document cover has an elastic member that is arranged at a position corresponding to the document placement unit and has a predetermined thickness, and projections that are arranged at positions different from the arrangement position of the elastic member and project toward the document placement platen. The projections are brought into contact with the document placement platen when the document cover is at the closing position, and thereby the elastic member is arranged on the document placement unit in a state in which a side of the elastic member having the arrangement positions of the projections is moved in a direction in which the side floats from the document placement unit.SELECTED DRAWING: Figure 7

Description

本発明は、複写機や複合機等の画像形成装置に備えられる原稿読取装置の改良に関する。 The present invention relates to an improvement of a document reading device provided in an image forming apparatus such as a copying machine or a multifunction device.

従来、イメージスキャナ等の原稿読取装置においては、一般に、原稿載置台と、この原稿載置台の上方に配置される原稿カバーとが備えられる。原稿載置台には、原稿が載置される透明ガラス板(原稿載置部)と、この透明ガラス板に載置された原稿を読み取る原稿読取部とが設けられている。一方、原稿カバーは、例えばその後端部が原稿載置台に回動自在に支持され、その後端部を回動支軸として回動させて、透明ガラス板を覆う閉位置と、開放する開位置との2位置に位置付け可能に設けられている。 Conventionally, in a document reading device such as an image scanner, a document mounting table and a document cover arranged above the document mounting table are generally provided. The document placing table is provided with a transparent glass plate (manuscript placing section) on which the document is placed and a document reading section for reading the document placed on the transparent glass plate. On the other hand, in the document cover, for example, the rear end is rotatably supported by the document mounting table, and the rear end is rotated as a rotation support shaft to cover a transparent glass plate with a closed position and an open position. It is provided so that it can be positioned at two positions.

このような原稿読取装置では、原稿カバーには、前記透明ガラス板に対応した大きさで所定の厚さを有する弾性部材が備えられていて、原稿が透明ガラス板に載置された状態で原稿カバーを前記閉位置に位置付けて、前記弾性部材を透明ガラス板に均一に密着させることにより、原稿読取部が原稿から良好な画質の画像を読み取りできるように構成している。 In such a document reading device, the document cover is provided with an elastic member having a size corresponding to the transparent glass plate and having a predetermined thickness, and the document is placed on the transparent glass plate. The cover is positioned at the closed position and the elastic member is evenly adhered to the transparent glass plate so that the document reading unit can read an image of good image quality from the document.

しかしながら、前記従来の原稿読取装置では、原稿のうちでも、特に写真原稿や光沢性を有する原稿の画像を読み取った際には、その読み取った画像データにシミのようなムラ、いわゆる原稿反射光による干渉縞(ニュートンリング)が発生する場合があった。 However, in the conventional document reading device, when an image of a photographic original or a glossy original is read among the originals, the read image data is caused by unevenness such as stains, so-called original reflected light. Interference fringes (Newton's rings) may occur.

そこで、従来、例えば特許文献1では、原稿の読み取り部分に、すりガラス状に加工したコンタクトガラスであるすりガラス部を設けると共に、このすりガラス部に原稿を押し当てる原稿付圧手段を設ける構成を採用している。この構成では、原稿読取時には、原稿読取部の照射光がすりガラス部で散乱して、原稿反射光による干渉縞の発生を抑制しながら、原稿を原稿付圧手段によってすりガラス部(コンタクトガラス)に確実に押し当てて、原稿の画像を正確に読み取るようにしている。 Therefore, conventionally, for example, in Patent Document 1, a configuration is adopted in which a frosted glass portion, which is a contact glass processed into a frosted glass shape, is provided in a reading portion of a document, and a document pressing means for pressing the document against the frosted glass portion is provided. There is. In this configuration, when scanning a document, the irradiation light of the document scanning section is scattered by the frosted glass section, and while suppressing the generation of interference fringes due to the reflected light of the document, the document is reliably placed on the frosted glass section (contact glass) by the document pressing means. It is pressed against the image of the original so that the image of the original can be read accurately.

特開2008-48019号公報Japanese Unexamined Patent Publication No. 2008-48019

前記特許文献1記載の技術は、原稿読取部の照射光をすりガラス部によって散乱させて、原稿反射光による干渉縞の発生を抑制するものである。 The technique described in Patent Document 1 scatters the irradiation light of the document reading unit by the ground glass unit to suppress the generation of interference fringes due to the reflected light of the document.

本願発明者等は、写真原稿や光沢性を有する原稿の場合には、画像の読取時に、原稿カバーの弾性部材が原稿の背面を均一圧で透明ガラス板側に押圧するため、原稿の表面の全面が透明ガラス板に密着して、読取画像に干渉縞が発生し易くなることを知悉した。 In the case of a photographic original or a glossy original, the inventor of the present application presses the back surface of the original with a uniform pressure toward the transparent glass plate when the image is read, so that the elastic member of the original cover presses the back surface of the original with a uniform pressure. I learned that the entire surface is in close contact with the transparent glass plate, and interference fringes are likely to occur in the scanned image.

この観点から、本発明は、原稿読取装置において、前記特許文献1の原稿読取部の照射光を散乱させる構成とは異なり、写真原稿や光沢性を有する原稿の場合には、その写真原稿等の表面の全面を弾性部材で透明ガラス板(画像載置部)に密着させない構成を採用することにより、干渉縞の発生を有効に抑制することを目的としている。 From this point of view, the present invention is different from the configuration in which the irradiation light of the document reading unit of Patent Document 1 is scattered in the document reading device. The purpose is to effectively suppress the occurrence of interference fringes by adopting a structure in which the entire surface of the surface is made of an elastic member so as not to be in close contact with the transparent glass plate (image mounting portion).

具体的に、本発明に係る原稿読取装置は、原稿が載置される透明な原稿載置部、及び、前記原稿載置部に載置された原稿を読み取る原稿読取部を有する原稿載置台と、回動支軸を中心に、前記原稿載置部を覆う位置と開放する位置とに回動可能に前記原稿載置台に支持される原稿カバーとを備えた原稿読取装置であって、前記原稿カバーは、前記原稿載置部と対応する位置に配置された所定の厚さを有する弾性部材と、前記弾性部材の配置位置とは異なる位置に配置され、前記原稿載置台側に突出する突出部とを有し、前記弾性部材は、前記原稿カバーが前記閉位置のとき、前記突出部が前記原稿載置台に当接することによって、前記弾性部材の前記突出部の配置位置側が前記原稿載置部から浮き上がる方向に移動した状態で前記原稿載置部上に配置されることを特徴とする。 Specifically, the document reading device according to the present invention includes a transparent document mounting section on which a document is placed, and a document mounting table having a document reading section for reading a document mounted on the document mounting section. A document reading device provided with a document cover that is rotatably supported by the document mounting table at a position that covers the document mounting portion and a position that opens the document mounting portion around a rotation support shaft. The cover is arranged at a position different from the elastic member having a predetermined thickness arranged at a position corresponding to the document placing portion and the arrangement position of the elastic member, and is a protruding portion protruding toward the document placing table side. When the document cover is in the closed position, the projecting portion abuts on the document mounting table, so that the position side of the projecting portion of the elastic member is the document placing portion. It is characterized in that it is arranged on the document placing portion in a state of being moved in the direction of floating from the above.

本発明によれば、原稿カバーに突出部が配置され、この突出部が原稿載置台側に突出することによって、原稿カバーが前記閉位置のときには、弾性部材は、その前記突出部の配置位置側が原稿載置部から浮き上がる方向に移動した状態で原稿載置部上に配置されており、これにより、写真原稿等の原稿読取時には、その写真原稿等の表面の全面が原稿載置部に密着することが制限されるので、読取画像に干渉縞が発生することが有効に抑制される。 According to the present invention, a projecting portion is arranged on the document cover, and the projecting portion projects toward the document mounting table. Therefore, when the document cover is in the closed position, the elastic member is placed on the arrangement position side of the projecting portion. It is placed on the document placing section in a state where it is moved in a floating direction from the document placing section, so that when reading a document such as a photographic original, the entire surface of the photographic document or the like is in close contact with the document placing section. Therefore, the occurrence of interference fringes in the scanned image is effectively suppressed.

実施形態1の原稿読取装置を備えた画像形成装置と情報端末とから成る画像処理装置を示す斜視図である。It is a perspective view which shows the image processing apparatus which comprises the image forming apparatus and the information terminal provided with the document reading apparatus of Embodiment 1. FIG. 原稿読取装置の原稿カバーを開位置に位置付けた状態の要部を示す分解斜視図である。It is an exploded perspective view which shows the main part in the state which the document cover of the document reader is positioned in an open position. 原稿読取装置の原稿載置台から原稿カバーを上方に取り外した状態の要部を示す分解斜視図である。It is an exploded perspective view which shows the main part in the state which the document cover is removed upward from the document placing table of the document reading device. 同原稿載置台から原稿カバーを取り外した状態を示す上面図である。It is a top view which shows the state which the document cover was removed from the document placing table. 原稿読取装置の内部構成を示す側断面図である。It is a side sectional view which shows the internal structure of a document reading apparatus. 原稿読取装置の内部の要部構成を示し、突出部が離間位置にある状態を示す要部拡大断面図である。It is an enlarged sectional view of the main part which shows the structure of the main part inside the document reading apparatus, and shows the state which the protruding part is in a separated position. 原稿読取装置の内部の要部構成を示し、突出部が当接位置にある状態を示す要部拡大断面図である。It is an enlarged sectional view of the main part which shows the structure of the main part inside the document reading apparatus, and shows the state which the protruding part is in a contact position. 弾性部材とコンタクトガラスとの間に形成される隙間の様子を示す概略説明図である。It is a schematic explanatory drawing which shows the state of the gap formed between an elastic member and a contact glass. 画像処理装置の制御系の要部を示すブロック図である。It is a block diagram which shows the main part of the control system of an image processing apparatus. 端末装置に備える第2操作部の表示画面の表示内容を示す図である。It is a figure which shows the display content of the display screen of the 2nd operation part provided in the terminal apparatus. 同表示画面の「いろいろなコピー」操作ボタンをタッチ操作した際に表示画面に表示される操作メニューを示す図である。It is a figure which shows the operation menu which is displayed on the display screen when the "various copy" operation buttons of the same display screen are touch-operated. 同表示画面の「写真をコピー」操作ボタンをタッチ操作した際に表示画面に表示される原稿サイズの選択画面を示す図である。It is a figure which shows the document size selection screen which is displayed on the display screen when the "copy photograph" operation button of the same display screen is touch-operated. 同表示画面を確認画面として表示された読取画像の一例及び画像調整ボタンを示す図である。It is a figure which shows an example of the scanned image and the image adjustment button which were displayed with the display screen as a confirmation screen. 実施形態2の原稿読取装置の原稿カバーに突出部を取り付ける様子を示す要部の斜視図である。FIG. 3 is a perspective view of a main part showing a state in which a protruding portion is attached to a document cover of the document reading device of the second embodiment. 同原稿カバーの要部の内部構成を示す側断面図である。It is a side sectional view which shows the internal structure of the main part of the original cover. 同原稿カバーに備える突出部の形状を示す斜視図である。It is a perspective view which shows the shape of the protrusion provided with the original cover.

以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(実施形態1)
図1は、本発明の実施形態1に係る原稿読取装置を備えた画像処理装置を示す斜視図である。
(Embodiment 1)
FIG. 1 is a perspective view showing an image processing device including a document reading device according to the first embodiment of the present invention.

同図において、画像処理装置1は、複写機能、ファクシミリ機能、プリンタ機能等を有する複合機(MFP:Multifunction Peripheral)であって、2つの筐体を備えており、横に並べて配置された画像形成装置2と情報端末3とで構成されている。画像形成装置2は、原稿の画像を読み取る原稿読取装置5と、原稿読取装置5により読み取られた原稿の画像又は外部から受信した画像をカラー又は単色で記録用紙に記録形成する画像形成装置本体6とを備えている。原稿読取装置5は、画像形成装置本体6の上面に装着されている。画像形成装置本体6は、原稿読取装置5で読み取られた原稿の画像を記録用紙や光沢紙に印刷する印刷部7と、複数の給紙カセット8等を備えており、印刷部7で印刷された記録用紙は、筐体の中ほどに設けられた排紙トレイ9に排出される。また、原稿読取装置5には、原稿載置台13と、その上方に位置する原稿カバー15とが備えられている。 In the figure, the image processing device 1 is a multifunction device (MFP: Multifunction Peripheral) having a copying function, a facsimile function, a printer function, etc., and has two housings, and forms images arranged side by side. It is composed of a device 2 and an information terminal 3. The image forming apparatus 2 includes a document reading device 5 that reads an image of a document, and an image forming apparatus main body 6 that records and forms an image of a document read by the document reading device 5 or an image received from the outside on recording paper in color or a single color. And have. The document reading device 5 is mounted on the upper surface of the image forming device main body 6. The image forming apparatus main body 6 includes a printing unit 7 for printing an image of a document read by the document reading device 5 on recording paper or glossy paper, a plurality of paper feed cassettes 8, and the like, and is printed by the printing unit 7. The recording paper is discharged to a paper ejection tray 9 provided in the middle of the housing. Further, the document reading device 5 is provided with a document mounting table 13 and a document cover 15 located above the document placing table 13.

一方、情報端末3は、記録媒体から読み取った画像を記録用紙や光沢紙に印刷し、筐体の下部に設けられた用紙排出口3aに記録用紙や光沢紙を排出する。画像形成装置2と情報端末3とは、互いに接続されてデータ通信を行っており、画像形成装置2と情報端末3とが連係動作する。この連係動作は、例えば、原稿読取装置5により読み取られた写真原稿の原稿データを情報端末3に送信し、その原稿データを情報端末3で光沢紙や印画紙等を用いて印刷し、写真として用紙排出口3aに排出する動作である。 On the other hand, the information terminal 3 prints an image read from a recording medium on recording paper or glossy paper, and discharges the recording paper or glossy paper to a paper ejection port 3a provided at the bottom of the housing. The image forming apparatus 2 and the information terminal 3 are connected to each other to perform data communication, and the image forming apparatus 2 and the information terminal 3 operate in cooperation with each other. In this linkage operation, for example, the manuscript data of the photographic manuscript read by the manuscript reading device 5 is transmitted to the information terminal 3, and the manuscript data is printed by the information terminal 3 using glossy paper, photographic paper, or the like, and is used as a photograph. This is an operation of discharging to the paper ejection port 3a.

原稿読取装置5において、画像載置台13部には、その前端側に、例えばタッチパネルより成る第1操作部11が配置され、情報端末3の上部にも、その前端側に同様の第2操作部18が配置されている。この2つの操作部11、18は、ユーザ等(操作者)の操作入力を受け付ける操作入力部であり、また画像を表示する表示画面11a、18aを有している。 In the document reading device 5, a first operation unit 11 made of, for example, a touch panel is arranged on the front end side of the image mounting table 13, and a similar second operation unit is arranged on the upper portion of the information terminal 3 on the front end side thereof. 18 is arranged. The two operation units 11 and 18 are operation input units that receive operation inputs of users and the like (operators), and also have display screens 11a and 18a for displaying images.

<原稿読取装置>
図2~図5は原稿読取装置5を示し、図2は原稿カバー15を開位置に位置付けた状態の要部を示す斜視図、図3は原稿載置台13から原稿カバー15を上方に取り外した状態の要部を示す分解斜視図、図4は同原稿カバー15を取り外した状態の原稿載置台13を示す上面図、図5は原稿読取装置5の内部構成を示す側断面図であり、図4のV-V線断面図である。以下、これらの図において、各部材等の説明については、画像処理装置1の前方に立った操作者が画像処理装置1側を見て、紙面後方側を後側、紙面前方側を前側、紙面左方側を左側、紙面右方側を右側と称する。
<Original reader>
2 to 5 show a document reading device 5, FIG. 2 is a perspective view showing a main part in a state where the document cover 15 is positioned in the open position, and FIG. 3 shows the document cover 15 removed upward from the document mounting table 13. An exploded perspective view showing a main part of the state, FIG. 4 is a top view showing a document mounting table 13 with the document cover 15 removed, and FIG. 5 is a side sectional view showing an internal configuration of the document reading device 5. 4 is a sectional view taken along line VV of 4. Hereinafter, in these drawings, the operator standing in front of the image processing device 1 looks at the image processing device 1 side, the rear side of the paper surface is the rear side, the front side of the paper surface is the front side, and the paper surface. The left side is called the left side, and the right side of the paper is called the right side.

原稿読取装置5は、光学系タイプの原稿読取装置とされており、原稿固定方式により原稿G(例えば、一般的な通常用紙に印刷された通常原稿や、写真原稿又は光沢性を有する原稿)を固定して、この原稿Gの画像を読み取るように構成されている。 The document reading device 5 is an optical system type document reading device, and uses a document fixing method to obtain a document G (for example, a normal document printed on general normal paper, a photographic document, or a glossy document). It is fixed and configured to read the image of this document G.

原稿読取装置5は、読取装置本体としての原稿載置台13と、該原稿載置台13の上方に配置される原稿カバー15とを備えている。原稿載置台13は、各種サイズの原稿Gが載置される原稿載置部20と、該原稿載置部20に載置された原稿を読み取る原稿読取部22(図5参照)とを有している。原稿載置部20は、ガラス板等の透明薄平板であるコンタクトガラスにより構成されている。以下、この原稿載置部20をコンタクトガラス20と称する。コンタクトガラス20は、平面視で四角形状に形成されて、原稿載置台13の上端部に配置されている。このコンタクトガラス20の上面には、図中左側部及び後側部において、各々、長方形状の樹脂カバー24、25が配置されている。コンタクトガラス20の上面には、A3、B4、A4、B5サイズや、写真で用いられるL判サイズ、2L判サイズの原稿G(図2及び図4に示す原稿G)を載置可能である。その際には、コンタクトガラス20の上面において、前記樹脂カバー24、25が位置しない領域(以下、透明領域という)の左後角部、すなわち操作者から見て左上角部を配置基準位置Pとして、この配置基準位置Pに原稿Gの左上角部を合わせて、原稿Gの表面を下方に向けて載置する設定である。 The document reading device 5 includes a document mounting table 13 as a reading device main body, and a document cover 15 arranged above the document loading table 13. The document placing table 13 has a document placing section 20 on which documents G of various sizes are placed, and a document reading section 22 (see FIG. 5) for reading a document placed on the document placing section 20. ing. The document placing portion 20 is made of contact glass, which is a transparent thin flat plate such as a glass plate. Hereinafter, the document placing portion 20 is referred to as a contact glass 20. The contact glass 20 is formed in a square shape in a plan view and is arranged at the upper end portion of the document placing table 13. On the upper surface of the contact glass 20, rectangular resin covers 24 and 25 are arranged on the left side portion and the rear side portion in the drawing, respectively. A3, B4, A4, B5 size, L size and 2L size manuscript G (manuscript G shown in FIGS. 2 and 4) used in photographs can be placed on the upper surface of the contact glass 20. In that case, on the upper surface of the contact glass 20, the left rear corner portion of the region where the resin covers 24 and 25 are not located (hereinafter referred to as a transparent region), that is, the upper left corner portion as seen from the operator is used as the placement reference position P. The upper left corner of the document G is aligned with the arrangement reference position P, and the surface of the document G is placed facing downward.

原稿読取部22は、原稿載置台13の内部に配置され、詳示しないが、例えば、原稿Gへ向けて光を照射する光源ユニットや、これを副走査方向(図5中で紙面垂直方向)に移動させる光学系駆動部、更には集光レンズや、この集光レンズからの光(原稿画像光)を繰り返し主走査方向(図5中で左右方向)に走査して、原稿画像を読み取る光電変換素子等を備えている。 The document reading unit 22 is arranged inside the document mounting table 13, and although not described in detail, for example, a light source unit that irradiates light toward the document G and a sub-scanning direction (in the direction perpendicular to the paper surface in FIG. 5). The optical system drive unit that moves the light source, and the light from the light source and the light source (original image light) are repeatedly scanned in the main scanning direction (left and right in FIG. 5) to read the original image. It is equipped with a conversion element and the like.

一方、原稿カバー15は、コンタクトガラス20上面に載置された原稿Gの背面を上方から押さえるものであり、平面視で四角形状に形成されている。該原稿カバー15には、後端部において、2個の開閉ヒンジ28が取り付けられている。これらの開閉ヒンジ28は、原稿カバー15の左端部の位置、及び、その右端部よりも若干左右方向の中央部側の位置に設けられている。各開閉ヒンジ28の下端には、四角柱形状の本体挿入部29が接続されている。一方、原稿載置台13には、コンタクトガラス20よりも後方の位置に、前記2つの本体挿入部29の相互間隔と同一間隔を隔てて配置された四角柱形状の凹部よりなる取付部31が形成されている。前記各本体挿入部29は、対応する取付部31に上方から抜き差し可能に挿入されていて、原稿カバー15はこれらの本体挿入部29によって原稿載置台13に支持される構成となっている。 On the other hand, the document cover 15 presses the back surface of the document G placed on the upper surface of the contact glass 20 from above, and is formed in a square shape in a plan view. Two opening / closing hinges 28 are attached to the document cover 15 at the rear end portion. These opening / closing hinges 28 are provided at the position of the left end portion of the document cover 15 and the position on the central portion side in the left-right direction slightly from the right end portion thereof. A quadrangular prism-shaped main body insertion portion 29 is connected to the lower end of each opening / closing hinge 28. On the other hand, the document mounting table 13 is formed with a mounting portion 31 formed of a quadrangular prism-shaped recess arranged at a position behind the contact glass 20 at the same spacing as the mutual spacing of the two main body insertion portions 29. Has been done. Each of the main body insertion portions 29 is inserted into the corresponding mounting portion 31 so as to be removable from above, and the document cover 15 is supported by the main body insertion portions 29 on the document mounting table 13.

従って、この原稿カバー15は、各開閉ヒンジ28のヒンジ軸28aを回動支軸fとし、この回動支軸fを中心としてコンタクトガラス20側に回動して、コンタクトガラス20を覆う閉位置と、この閉位置から上方に回動して、コンタクトガラス20を開放する開位置とに位置付けられる。また、原稿カバー15は、厚みのある本等の原稿Gがコンタクトガラス20に載置された状態で閉位置に位置付けられた際には、本体挿入部29の上端部が原稿載置台13の取付部31から若干上方に抜け出て、原稿カバー15を水平状態として、本等の原稿Gを良好に覆うことが可能である。 Therefore, the document cover 15 has a hinge shaft 28a of each opening / closing hinge 28 as a rotation support shaft f, and rotates toward the contact glass 20 about the rotation support shaft f to cover the contact glass 20 in a closed position. And, it is positioned at the open position where the contact glass 20 is opened by rotating upward from this closed position. Further, when the document cover 15 is positioned in the closed position with the document G such as a thick book placed on the contact glass 20, the upper end of the main body insertion portion 29 is attached to the document mounting table 13. It is possible to squeeze out slightly upward from the portion 31 so that the document cover 15 is in a horizontal state and cover the document G such as a book satisfactorily.

前記原稿カバー15には、その下面に弾性部材35が配置されている。弾性部材35は、前記コンタクトガラス20の透明領域と同一広さの四角形状に形成され、且つコンタクトガラス20の透明領域の上方において該コンタクトガラス20と対応する位置に配置されている。すなわち、弾性部材35は、原稿カバー15が閉位置に位置付けられた際には、その4つの角部の位置がコンタクトガラス20の透明領域の対応する角部と一致して、コンタクトガラス20の上面に精度良く対峙する。弾性部材35は、所定の厚さを有する弾性体により形成され、その下面には白色の薄シート(図示せず)が貼り付けられている。原稿カバー15の下面には、その後端部に開閉ヒンジ28の取付用領域35aが存在するため、弾性部材35は、この取付用領域35aよりも前方側に位置している。弾性部材35は、原稿カバー15が前記閉位置に位置付けられた状態では、その弾性力によってコンタクトガラス20上面の原稿Gを一様に下方に押し付ける機能を有する。 An elastic member 35 is arranged on the lower surface of the document cover 15. The elastic member 35 is formed in a rectangular shape having the same size as the transparent region of the contact glass 20, and is arranged at a position corresponding to the contact glass 20 above the transparent region of the contact glass 20. That is, when the original cover 15 is positioned in the closed position, the elastic member 35 has four corners that coincide with the corresponding corners of the transparent region of the contact glass 20 and is the upper surface of the contact glass 20. Confront with precision. The elastic member 35 is formed of an elastic body having a predetermined thickness, and a white thin sheet (not shown) is attached to the lower surface thereof. Since the mounting region 35a of the opening / closing hinge 28 exists at the rear end of the lower surface of the document cover 15, the elastic member 35 is located on the front side of the mounting region 35a. The elastic member 35 has a function of uniformly pressing the document G on the upper surface of the contact glass 20 downward by the elastic force of the document cover 15 when the document cover 15 is positioned at the closed position.

前記弾性部材35は、図5に示したように、その背面(上面)側が原稿カバー15の本体枠16に固定されている。この本体枠16は、前後方向の略中央部位で2分割された前側枠体16aと後側枠体16bとを備えている。この前側枠体16aと後側枠体16bとは、中折れ用ヒンジ17にて連結されていて、原稿カバー15の開位置時には中折れ用ヒンジ17のヒンジ軸17aを中心に、前側枠体16aとその下方に位置する弾性部材35の前部側部分とが図5中で反時計方向に回動して、原稿カバー15を中折れ状態にすることが可能である。 As shown in FIG. 5, the back surface (upper surface) side of the elastic member 35 is fixed to the main body frame 16 of the document cover 15. The main body frame 16 includes a front side frame body 16a and a rear side frame body 16b that are divided into two at a substantially central portion in the front-rear direction. The front side frame body 16a and the rear side frame body 16b are connected by a hinge for center folding, and when the document cover 15 is opened, the front side frame body 16a is centered on the hinge shaft 17a of the hinge for center folding. And the front side portion of the elastic member 35 located below the elastic member 35 rotate counterclockwise in FIG. 5, so that the document cover 15 can be folded in the middle.

そして、前記原稿カバー15の下面には、原稿載置台13側に突出する2つの突出部40L、40Rが配置されている。これらの突出部40L、40Rは、弾性部材35とは異なる位置、具体的には弾性部材35の後方に配置、すなわち原稿カバー15の回動支軸f(開閉ヒンジ28のヒンジ軸28a)側に配置されている。原稿カバー15が前記閉位置に位置付けられた状態では、これらの突出部40L、40Rは、原稿載置台13上において、図4に破線二重丸印で示した位置に位置付けられる。具体的に説明すると、左側の突出部40Lは、同図において、前後方向に延びる樹脂カバー25の後端部の位置、すなわち、コンタクトガラス20上の原稿Gの配置基準位置Pの近傍に配置される。一方、右側の突出部40Rは、左右方向に延びる樹脂カバー24の左右方向の略中央部位の位置に配置される。この右側の突出部40Rの配置位置は、例えば、同図に示したように、原稿Gの配置基準位置Pからの距離が、2L判サイズ(127×178mm)の写真原稿Gを横配置(長辺を左右方向にした配置)で、その長辺(178mm)を若干越える長さ(例えばA3サイズ(297×420mm)の長辺の1/2値の210mm)の位置である。 On the lower surface of the document cover 15, two projecting portions 40L and 40R projecting toward the document mounting table 13 are arranged. These protrusions 40L and 40R are arranged at positions different from the elastic member 35, specifically behind the elastic member 35, that is, on the rotation support shaft f (hinge shaft 28a of the opening / closing hinge 28) side of the document cover 15. Have been placed. In the state where the document cover 15 is positioned at the closed position, these protrusions 40L and 40R are positioned on the document mounting table 13 at the positions indicated by the broken double circles in FIG. Specifically, the protrusion 40L on the left side is arranged in the figure at the position of the rear end portion of the resin cover 25 extending in the front-rear direction, that is, in the vicinity of the placement reference position P of the document G on the contact glass 20. To. On the other hand, the protrusion 40R on the right side is arranged at a position substantially central in the left-right direction of the resin cover 24 extending in the left-right direction. As for the arrangement position of the protrusion 40R on the right side, for example, as shown in the figure, the photographic original G having a distance from the arrangement reference position P of the original G of 2L size (127 × 178 mm) is horizontally arranged (long). It is a position with a length slightly exceeding the long side (178 mm) (for example, 210 mm, which is a half value of the long side of A3 size (297 × 420 mm)) in the arrangement with the sides oriented in the left-right direction.

前記2つの突出部40L、40R周りの構成は、同一構成である。以下、右側の突出部40R周りの構成について説明する。図6は、図5に示した原稿読取装置5の側断面図において右側の突出部40R周りを拡大した図である。図5及び図6において、突出部40Rは、円板状の水平板42と、該水平板42の中心に位置して上下方向に延びる軸部43とから成っており、軸部43は、原稿カバー15の本体枠16を下方(原稿載置台13側)に凸状に切り欠いた切欠部19に臨み、水平板42は該切欠部19の下方に位置して、原稿載置台13の樹脂カバー24の上面に対峙している。2つの突出部40L、40Rは、各々、移動機構47によってコンタクトガラス20側に移動可能である。 The configurations around the two protrusions 40L and 40R are the same. Hereinafter, the configuration around the protrusion 40R on the right side will be described. FIG. 6 is an enlarged view around the protrusion 40R on the right side in the side sectional view of the document reading device 5 shown in FIG. In FIGS. 5 and 6, the projecting portion 40R is composed of a disk-shaped horizontal plate 42 and a shaft portion 43 located at the center of the horizontal plate 42 and extending in the vertical direction, and the shaft portion 43 is a document. The main body frame 16 of the cover 15 faces the notch 19 which is convexly cut downward (on the side of the document mounting table 13), and the horizontal plate 42 is located below the notch 19, and the resin cover of the document mounting table 13 is located. It faces the upper surface of 24. The two protrusions 40L and 40R can be moved to the contact glass 20 side by the moving mechanism 47, respectively.

移動機構47は、図6に拡大して詳示するように、偏心カム48と、バネ49と、抜け止め板50とを備え、抜け止め板50は突出部40Rの軸部43の上端部に固定されている。また、バネ49は抜け止め板50と切欠部19周辺との間に縮装されると共に、その内部には水平板42の軸部43が挿入されていて、その付勢力によって突出部40Rを上方に移動させて、水平板42を切欠部19の周辺に位置付けている。偏心カム48は、原稿カバー15の本体枠16の後側枠体16bの上方に配置され、抜け止め板50を介して水平板42の軸部43上面に当接している。そして、図7に示すように、偏心カム48がそのカム軸48aを中心に回動することにより、突出部40Rを下方(原稿載置台13側)に移動させる機能を有している。具体的に、移動機構47は、図6に示すように、偏心カム48がその短径部分を水平板42の軸部43上面に当接させた場合には、突出部40Rはバネ49の付勢力によって上方に位置付けられて、水平板42が原稿載置台13の樹脂カバー24から離間し、原稿載置台13と当接しない離間位置(第1位置)に位置付けられる。 As shown in detail in an enlarged manner in FIG. 6, the moving mechanism 47 includes an eccentric cam 48, a spring 49, and a retaining plate 50, and the retaining plate 50 is located at the upper end of the shaft portion 43 of the protrusion 40R. It is fixed. Further, the spring 49 is contracted between the retaining plate 50 and the periphery of the notch 19, and the shaft portion 43 of the horizontal plate 42 is inserted inside the spring 49, and the protruding portion 40R is moved upward by the urging force thereof. The horizontal plate 42 is positioned around the notch 19 by moving to. The eccentric cam 48 is arranged above the rear frame body 16b of the main body frame 16 of the document cover 15 and is in contact with the upper surface of the shaft portion 43 of the horizontal plate 42 via the retaining plate 50. Then, as shown in FIG. 7, the eccentric cam 48 has a function of moving the protruding portion 40R downward (on the document mounting table 13 side) by rotating around the cam shaft 48a. Specifically, as shown in FIG. 6, when the eccentric cam 48 brings its short diameter portion into contact with the upper surface of the shaft portion 43 of the horizontal plate 42, the protruding portion 40R has a spring 49 attached to the moving mechanism 47. Positioned upward by force, the horizontal plate 42 is positioned at a separated position (first position) where the horizontal plate 42 is separated from the resin cover 24 of the document mounting table 13 and does not come into contact with the document mounting table 13.

一方、移動機構47において、図7に示したように、偏心カム48がその長径部分を水平板42の軸部43上面に当接させた場合には、突出部40Rはバネ49の付勢力に抗して下方に移動して、水平板42が原稿載置台13の樹脂カバー24に当接して、突出部40Rが原稿載置台13に当接する当接位置(第2位置)に位置付けられる。この当接位置では、原稿カバー15の弾性部材35は、突出部40Rの配置位置近傍の部位が、コンタクトガラス20から上方に浮き上がることになる。この弾性部材35が浮き上がる動作の詳細は次の通りである。すなわち、突出部40Rの水平板42が原稿載置台13の樹脂カバー24と当接すると、原稿カバー15の本体枠16の後側枠体16bが若干上方に浮き上がる。この時、本体枠16の後側枠体16bが中折れ用ヒンジ17のヒンジ軸17aを中心に図7中において矢印dで示す時計方向に回動し、上昇する。そのため、原稿カバー15の開閉ヒンジ28の本体挿入部29が矢印eで示すように上方向に上昇し、原稿載置台13の取付部31から抜け出る。その結果、原稿カバー15の弾性部材35は、突出部40Rの配置位置近傍がコンタクトガラス20から上方に浮き上がり、原稿カバー15の弾性部材35とコンタクトガラス20との間が拡大して、隙間Δtが形成された状態でコンタクトガラス20上に配置されることになる。 On the other hand, in the moving mechanism 47, as shown in FIG. 7, when the eccentric cam 48 brings its major axis portion into contact with the upper surface of the shaft portion 43 of the horizontal plate 42, the protruding portion 40R exerts an urging force on the spring 49. Against the downward movement, the horizontal plate 42 abuts on the resin cover 24 of the document mounting table 13, and the protrusion 40R is positioned at the contact position (second position) where the projecting portion 40R abuts on the document mounting table 13. At this contact position, the elastic member 35 of the document cover 15 has a portion near the arrangement position of the protrusion 40R, which rises upward from the contact glass 20. The details of the operation of the elastic member 35 floating are as follows. That is, when the horizontal plate 42 of the projecting portion 40R comes into contact with the resin cover 24 of the document mounting table 13, the rear frame body 16b of the main body frame 16 of the document cover 15 slightly rises upward. At this time, the rear frame body 16b of the main body frame 16 rotates clockwise around the hinge shaft 17a of the hinge for center bending 17 in the direction of the arrow d in FIG. 7 and rises. Therefore, the main body insertion portion 29 of the opening / closing hinge 28 of the document cover 15 rises upward as indicated by the arrow e, and exits from the mounting portion 31 of the document mounting table 13. As a result, in the elastic member 35 of the document cover 15, the vicinity of the arrangement position of the protruding portion 40R rises upward from the contact glass 20, the space between the elastic member 35 of the document cover 15 and the contact glass 20 expands, and the gap Δt is increased. It will be placed on the contact glass 20 in the formed state.

前記隙間Δtは、例えば所定の長さΔt1(例えば、最大値で1mm以下、望ましくは0.2~0.3mm程度)に設定される。この長さΔt1は、図8に示したように、原稿Gの前後方向の後端位置、すなわち原稿Gの配置基準位置Pの位置にて前記最大値を有し、次第に前方に向かって狭くなり、例えば2L判サイズ(127×178mm)の写真原稿Gを横配置した場合の短辺(127mm)を若干越える長さの位置で長さΔt1が写真原稿Gの厚さ以下になる程度が好ましい。 The gap Δt is set to, for example, a predetermined length Δt1 (for example, a maximum value of 1 mm or less, preferably about 0.2 to 0.3 mm). As shown in FIG. 8, this length Δt1 has the maximum value at the rear end position in the front-rear direction of the document G, that is, the position of the placement reference position P of the document G, and gradually narrows toward the front. For example, it is preferable that the length Δt1 is equal to or less than the thickness of the photographic document G at a position slightly exceeding the short side (127 mm) when the photographic document G having a size of 2 L (127 × 178 mm) is horizontally arranged.

尚、原稿カバー15の閉位置時には、前記突出部40Rが当接位置に位置付けられることによって、突出部40Rの配置位置近傍において弾性部材35とコンタクトガラス20との間に隙間Δtを形成したが、この隙間Δtは必ずしも形成する必要はなく、弾性部材35とコンタクトガラス20との間が微視的に拡大してコンタクトガラス20から浮き上がる方向に移動した状態、例えば、弾性部材35がその弾性力でコンタクトガラス20と密着していず、弾性部材35がコンタクトガラス20の上面に単に接している状態(換言すれば、弾性力がコンタクトガラス20に作用していない状態)であってもよい。 When the document cover 15 is closed, the protruding portion 40R is positioned at the contact position, so that a gap Δt is formed between the elastic member 35 and the contact glass 20 in the vicinity of the arrangement position of the protruding portion 40R. It is not always necessary to form this gap Δt, and a state in which the space between the elastic member 35 and the contact glass 20 is slightly enlarged and moved in a direction of floating from the contact glass 20, for example, the elastic member 35 is due to its elastic force. It may be in a state in which the elastic member 35 is not in close contact with the contact glass 20 and is simply in contact with the upper surface of the contact glass 20 (in other words, a state in which the elastic force does not act on the contact glass 20).

前記隙間Δtの長さΔt1は、後述する制御部60によって偏心カム48を微細に回動させることにより、細かく調整することが可能である。以下、この構成について説明する。 The length Δt1 of the gap Δt can be finely adjusted by finely rotating the eccentric cam 48 by the control unit 60 described later. Hereinafter, this configuration will be described.

図9は、画像処理装置1の制御系の要部の概略を示すブロック図である。同図において、画像処理装置1の制御系には、制御部60が備えられる。該制御部60には、画像処理装置1の操作者による原稿読取部22の原稿読取動作の指示を受け付ける第1操作部11及び第2操作部18からの操作信号が入力されている。制御部60は、これらの操作部11、18からの操作信号に基づいて原稿読取部22の原稿読取動作を制御すると共に、前記原稿カバー15に設けた移動機構47の偏心カム48の回動動作を行うモータ63を制御する。以下、具体的に説明する。 FIG. 9 is a block diagram showing an outline of a main part of the control system of the image processing apparatus 1. In the figure, the control system of the image processing device 1 is provided with a control unit 60. Operation signals from the first operation unit 11 and the second operation unit 18 that receive instructions for the document reading operation of the document reading unit 22 by the operator of the image processing device 1 are input to the control unit 60. The control unit 60 controls the document reading operation of the document reading unit 22 based on the operation signals from the operation units 11 and 18, and also rotates the eccentric cam 48 of the moving mechanism 47 provided on the document cover 15. Controls the motor 63 to perform the above. Hereinafter, a specific description will be given.

図10は、前記第2操作部18の表示画面18aの具体例を示す。同図において、第2操作部18は、表示画面18aにおいて、「片面コピー」、「スマホでプリント・スキャン」、「いろいろなコピー」、「ネットワークプリント」、「写真・文書プリント」、「ファクス」、「スキャン」、及び「行政サービス」の各種操作ボタン65を有している。例えば、「いろいろなコピー」の操作ボタン65をタッチ操作した場合には、表示画面18aが切り換わって、図11に示すように、操作者が原稿の種別を選択する原稿種別選択画面(原稿種別選択部)67が表示される。この原稿種別選択画面67では、各種のコピーメニューとして、「片面にコピー」、「両面にコピー」、「拡大/縮小する」、「はがきにコピー」、「写真をコピー」の各種操作ボタン66が表示される。「写真をコピー」の操作ボタン66は、写真原稿Gの他、光沢紙に各種印刷が施された光沢性を有する原稿(以下、光沢性原稿という)Gをコピーする際にも操作される。以下、写真原稿Gと言うときは、光沢性原稿Gを含むものとする。 FIG. 10 shows a specific example of the display screen 18a of the second operation unit 18. In the figure, the second operation unit 18 has "single-sided copy", "print / scan with a smartphone", "various copies", "network print", "photo / document print", and "fax" on the display screen 18a. , "Scan", and "Administrative Services" have various operation buttons 65. For example, when the operation button 65 of "various copies" is touch-operated, the display screen 18a is switched, and as shown in FIG. 11, the manuscript type selection screen (manuscript type) in which the operator selects the manuscript type. Selection unit) 67 is displayed. On the document type selection screen 67, various operation buttons 66 of "copy on one side", "copy on both sides", "enlarge / reduce", "copy on postcard", and "copy photo" are displayed as various copy menus. Is displayed. The operation button 66 of "copy photo" is also operated when copying a photo original G and a glossy original (hereinafter referred to as glossy original) G printed on glossy paper. Hereinafter, when the term "photographic manuscript G" is used, it is assumed that the glossy manuscript G is included.

そして、「写真をコピー」の操作ボタン66がタッチ操作された場合には、更に表示画面18aが切り換わって、図12に示すように、写真原稿Gのサイズの指定ボタン68がL判指定と、2L判指定の2種類表示される。制御部60は、そのL判又は2L判サイズを指定した操作信号を受けて、突出部40L、40Rを前記当接位置に位置付けるように、偏心カム48回動用のモータ63を駆動すると共に、このモータ63の駆動後において、L判又は2L判の写真原稿Gを読み取るように原稿読取部22を制御する。すなわち、制御部60は、予め定めた特定の種別の原稿として、L判又は2L判の写真原稿G(光沢性原稿Gを含む)が選択、指示された場合に、突出部40L、40Rを当接位置に位置付けるように、モータ63により移動機構47の偏心カム48の回動動作を制御する。 Then, when the operation button 66 of "copy photo" is touch-operated, the display screen 18a is further switched, and as shown in FIG. 12, the size designation button 68 of the photo document G is designated as L size. Two types of 2L size designation are displayed. The control unit 60 receives an operation signal designating the L size or 2L size, drives the motor 63 for rotating the eccentric cam 48 so as to position the protrusions 40L and 40R at the contact position, and at the same time, drives the motor 63 for rotating the eccentric cam 48. After driving the motor 63, the document reading unit 22 is controlled so as to read the L-size or 2L-size photographic document G. That is, when the L-size or 2L-size photographic original G (including the glossy original G) is selected and instructed by the control unit 60 as a predetermined specific type of original, the control unit 60 hits the protrusions 40L and 40R. The motor 63 controls the rotational operation of the eccentric cam 48 of the moving mechanism 47 so that it is positioned at the tangential position.

一方、図11の原稿種別選択画面67において、「写真をコピー」以外、すなわち「片面にコピー」、「両面にコピー」、「拡大/縮小する」、「はがきにコピー」の各種操作ボタン66がタッチ操作された場合には、通常用紙やはがきを原稿Gとするコピー操作であるので、制御部60は、突出部40L、40Rを離間位置に位置付けるように、偏心カム48回動用のモータ63を駆動する。 On the other hand, on the document type selection screen 67 of FIG. 11, various operation buttons 66 other than "copy photo", that is, "copy on one side", "copy on both sides", "enlarge / reduce", and "copy on postcard" are displayed. When the touch operation is performed, since it is a copy operation using normal paper or a postcard as the document G, the control unit 60 sets a motor 63 for rotating the eccentric cam 48 so as to position the protrusions 40L and 40R at separate positions. Drive.

このように、制御部60は、第2操作部18が受け付けた原稿読取動作の内容に応じて、L判又は2L判の写真原稿Gの読取動作時には、突出部40L、40Rを当接位置に移動させるように移動機構47の偏心カム48の回動動作を制御する一方、それらの写真原稿G以外の通常用紙等に印刷された文書等の原稿Gの原稿読取時には、突出部40L、40Rを離間位置に移動させるように移動機構47の偏心カム48の回動動作を制御する。 As described above, the control unit 60 sets the protruding portions 40L and 40R at the contact positions during the reading operation of the L-size or 2L-size photographic document G according to the content of the document reading operation received by the second operation unit 18. While controlling the rotational operation of the eccentric cam 48 of the moving mechanism 47 so as to move it, the protrusions 40L and 40R are used when reading the original G such as a document printed on ordinary paper other than the photographic original G. The rotational operation of the eccentric cam 48 of the moving mechanism 47 is controlled so as to move the moving mechanism 47 to a separated position.

また、制御部60は、原稿読取部22によりL判又は2L判サイズの写真原稿Gを読み取った後、図13に示すように、第2操作部18の表示画面18aを確認画面69として、原稿読取動作によって得られた読取画像を確認画面69に表示する。同図では、確認画面69に、写真原稿Gの読取画像(山の画像)が表示され、この読取画像に干渉縞mが発生している一例である。この確認画面69には、画像調整用の操作ボタン(調整操作ボタン)70も表示される。画像処理装置1の操作者は、この確認画面69の画像(確認画像)を確認し、この確認画像に干渉縞mの発生がある場合には、干渉縞mを無くすように画像調整用(きれい度調整用)の操作ボタン70をタッチ操作することが可能である。制御部60は、この画像調整用の操作ボタン70の操作信号を受け、その操作信号に応じて偏心カム48回動用のモータ63を動作させて、突出部40L、40Rの突出量を調整することにより、弾性部材35とコンタクトガラス20との間の隙間Δtの長さΔt1を調整する。 Further, after the control unit 60 reads the L size or 2L size photographic document G by the document reading unit 22, the control unit 60 uses the display screen 18a of the second operation unit 18 as the confirmation screen 69 as the document, as shown in FIG. The scanned image obtained by the scanning operation is displayed on the confirmation screen 69. In the figure, a scanned image (mountain image) of the photographic document G is displayed on the confirmation screen 69, and this is an example in which interference fringes m are generated in the scanned image. An operation button (adjustment operation button) 70 for image adjustment is also displayed on the confirmation screen 69. The operator of the image processing device 1 confirms the image (confirmation image) of the confirmation screen 69, and if the confirmation image has an interference fringe m, it is used for image adjustment (clean) so as to eliminate the interference fringe m. It is possible to touch the operation button 70 (for adjusting the degree). The control unit 60 receives the operation signal of the operation button 70 for image adjustment, operates the motor 63 for rotating the eccentric cam 48 in response to the operation signal, and adjusts the protrusion amount of the protrusions 40L and 40R. Therefore, the length Δt1 of the gap Δt between the elastic member 35 and the contact glass 20 is adjusted.

従って、本実施形態では、操作者がコンタクトガラス20の上面に写真原稿Gの左上角部を配置基準位置Pに合わせて載置して、「写真をコピー」の操作ボタン66をタッチ操作した場合には、制御部60がモータ63を制御し、移動機構47の偏心カム48を回動させて、突出部40L、40Rをコンタクトガラス20側に突出させて当接位置に移動させる。これにより、原稿カバー15の弾性部材35は、突出部40L、40Rの配置位置の近傍、すなわち写真原稿Gの配置領域が上方に浮き上がり、弾性部材35とコンタクトガラス20との間が拡大して、隙間Δtが形成された状態でコンタクトガラス20上に配置される。この隙間Δtの長さΔt1は、コンタクトガラス20の後端位置(配置基準位置Pの位置側)で大きく、前方に向かって次第に減少するので、写真原稿Gはその背面全体が弾性部材35の弾性力で均一に押圧されない状態となっていて、写真原稿Gの表面は、その全面がコンタクトガラス20とは均一に密着しない状態となる。その結果、原稿読取部22による写真原稿Gの原稿読取動作時には、写真原稿Gの表面とコンタクトガラス20とが均一圧で全面密着することに起因する干渉縞mの発生が有効に抑制されることになる。 Therefore, in the present embodiment, when the operator places the upper left corner portion of the photographic document G on the upper surface of the contact glass 20 in accordance with the arrangement reference position P and touches the operation button 66 of "copy photo". The control unit 60 controls the motor 63 and rotates the eccentric cam 48 of the moving mechanism 47 to project the protruding portions 40L and 40R toward the contact glass 20 and move them to the contact position. As a result, in the elastic member 35 of the document cover 15, the vicinity of the arrangement positions of the protrusions 40L and 40R, that is, the arrangement area of the photographic document G rises upward, and the space between the elastic member 35 and the contact glass 20 expands. It is arranged on the contact glass 20 with the gap Δt formed. The length Δt1 of this gap Δt is large at the rear end position of the contact glass 20 (the position side of the arrangement reference position P) and gradually decreases toward the front. Therefore, the entire back surface of the photographic document G is elastic of the elastic member 35. The surface of the photographic original G is not uniformly pressed by the force, and the entire surface of the photographic document G is not uniformly pressed with the contact glass 20. As a result, when the original reading operation of the photographic original G is performed by the original reading unit 22, the generation of interference fringes m due to the surface of the photographic original G and the contact glass 20 being in close contact with each other at a uniform pressure is effectively suppressed. become.

ここで、突出部40L、40Rは、原稿カバー15の前後方向のうち、後端部側、すなわち原稿カバー15の回動支点(開閉ヒンジ28のヒンジ軸28a)側に配置されている。この回動支軸f側は、弾性部材35の後方側に開閉ヒンジ28の取付用領域35aが存在するため、図6に示したように、弾性部材35の後端位置Eから原稿カバー15の後端位置Cまでの距離kが長い。一方、弾性部材35の前端位置には、前記開閉ヒンジ28の取付用領域35a等がないため、図5に示したように弾性部材35の前端位置と原稿カバー15の前端位置との距離rが前記距離kよりも短い(r<k)。従って、原稿カバー15の閉位置時に、突出部40L、40Rの位置近傍で弾性部材35とコンタクトガラス20との間に隙間Δtが存在していても、外部光はその突出部40L、40Rの位置まで届き難いので、外部光が隙間Δtを経てコンタクトガラス20に入り込むことを十分に抑制でき、写真原稿Gの読取画像にノイズが入ることをより確実に防止することが可能である。 Here, the protrusions 40L and 40R are arranged on the rear end side of the document cover 15 in the front-rear direction, that is, on the rotation fulcrum side of the document cover 15 (hinge shaft 28a of the opening / closing hinge 28). On the rotation support shaft f side, since the mounting region 35a of the opening / closing hinge 28 exists on the rear side of the elastic member 35, as shown in FIG. 6, the document cover 15 is placed from the rear end position E of the elastic member 35. The distance k to the rear end position C is long. On the other hand, since the front end position of the elastic member 35 does not have the mounting area 35a or the like of the opening / closing hinge 28, the distance r between the front end position of the elastic member 35 and the front end position of the document cover 15 is as shown in FIG. It is shorter than the distance k (r <k). Therefore, even if there is a gap Δt between the elastic member 35 and the contact glass 20 near the positions of the protruding portions 40L and 40R when the document cover 15 is closed, the external light is at the positions of the protruding portions 40L and 40R. Since it is difficult to reach the contact glass 20, it is possible to sufficiently suppress the external light from entering the contact glass 20 through the gap Δt, and it is possible to more reliably prevent noise from entering the scanned image of the photographic document G.

しかも、コンタクトガラス20に載置される原稿Gが写真原稿G以外の原稿G、例えば干渉縞mの生じ難い通常用紙等に印刷された原稿G(通常原稿G)等の場合には、制御部60は、移動機構47により突出部40L、40Rを離間位置に位置付けていて、弾性部材35とコンタクトガラス20との間の隙間Δtは無くなっている。従って、コンタクトガラス20上面の通常原稿Gは、その背面が弾性部材35の弾性力でもってコンタクトガラス20側に押圧されて、通常原稿Gの表面は、その全面がコンタクトガラス20に均一に押圧される。従って、たとえこの通常原稿Gに折り曲げ跡がある場合であっても、通常原稿Gの浮きの発生が抑制されて、通常原稿Gに印刷された文字の滲みや掠れが少なく、折り曲げ跡も筋として読み取られることが十分に抑制される。 Moreover, when the manuscript G placed on the contact glass 20 is a manuscript G other than the photographic manuscript G, for example, a manuscript G printed on normal paper or the like in which interference fringes m are unlikely to occur (normal manuscript G), the control unit. In the 60, the protrusions 40L and 40R are positioned at separated positions by the moving mechanism 47, and the gap Δt between the elastic member 35 and the contact glass 20 is eliminated. Therefore, the back surface of the normal document G on the upper surface of the contact glass 20 is pressed toward the contact glass 20 by the elastic force of the elastic member 35, and the entire surface of the surface of the normal document G is uniformly pressed by the contact glass 20. Ru. Therefore, even if the normal document G has fold marks, the occurrence of floating of the normal document G is suppressed, the characters printed on the normal document G are less blurred or blurred, and the fold marks are also used as streaks. Reading is sufficiently suppressed.

また、写真原稿Gが原稿読取部22により読み取られた際には、その読取画像は確認画面69に表示されるので、操作者は、その読取画像に干渉縞mが発生している場合には、画像のきれい度調整用の操作ボタン70を操作できる。このとき、制御部60は、この操作ボタン70の操作に応じて移動機構47のモータ63を制御することにより、突出部40L、40Rの突出量を調整して、弾性部材35とコンタクトガラス20との間の隙間Δtの長さΔt1を微調整する。従って、写真原稿Gの原稿読取時に、当初は読取画像に干渉縞mが発生していても、最終的には干渉縞mの発生のない良好な読取画像を得ることが可能である。 Further, when the photographic document G is read by the document reading unit 22, the scanned image is displayed on the confirmation screen 69, so that the operator can see if the scanned image has interference fringes m. , The operation button 70 for adjusting the cleanliness of the image can be operated. At this time, the control unit 60 adjusts the protrusion amount of the protrusions 40L and 40R by controlling the motor 63 of the moving mechanism 47 in response to the operation of the operation button 70, and the elastic member 35 and the contact glass 20. Fine-tune the length Δt1 of the gap Δt between them. Therefore, even if interference fringes m are initially generated in the scanned image when the photographic document G is read, it is possible to finally obtain a good scanned image without interference fringes m.

(実施形態2)
図14は本発明の実施形態2の原稿読取装置5の原稿カバー15の要部を示す斜視図、図15は同原稿読取装置5の要部の側断面図である。
(Embodiment 2)
FIG. 14 is a perspective view showing a main part of the document cover 15 of the document reading device 5 of the second embodiment of the present invention, and FIG. 15 is a side sectional view of the main part of the document reading device 5.

前記実施形態1では、移動機構47を設けて、突出部40L、40Rを当接位置と離間位置とに位置変更可能な構成としたが、本実施形態では突出部40L、40Rのみを配置して、移動機構47は設けない構成としている。 In the first embodiment, the moving mechanism 47 is provided so that the protruding portions 40L and 40R can be changed in position between the contact position and the separated position. However, in the present embodiment, only the protruding portions 40L and 40R are arranged. , The moving mechanism 47 is not provided.

具体的に、図14及び図15において、原稿カバー15の下面には、実施形態1と同様に回動支軸fの近傍に2つの突出部40L、40R(左側の突出部40Lのみを図示している)が配置されている。この突出部40L、40Rは、原稿カバー15の本体枠16の切欠部19に挿入される。この突出部40L、40Rは、図16にも示すように、水平板42と軸部43とを有し、軸部43には、その周辺を切り欠いて形成した係止部44が形成されていて、この係止部44が本体枠16の切欠部19の周辺に係止して、突出部40L、40Rが本体枠16に取り付けられている。 Specifically, in FIGS. 14 and 15, two protrusions 40L and 40R (only the left protrusion 40L) are shown on the lower surface of the document cover 15 in the vicinity of the rotation support shaft f as in the first embodiment. ) Is placed. The protruding portions 40L and 40R are inserted into the cutout portion 19 of the main body frame 16 of the document cover 15. As shown in FIG. 16, the protruding portions 40L and 40R have a horizontal plate 42 and a shaft portion 43, and the shaft portion 43 is formed with a locking portion 44 formed by cutting out the periphery thereof. The locking portion 44 is locked around the notch 19 of the main body frame 16, and the protruding portions 40L and 40R are attached to the main body frame 16.

前記突出部40L、40Rは、水平板42が原稿カバー15の本体枠16からコンタクトガラス20側に突出していて、原稿カバー15の閉位置時には、水平板42が原稿載置台13の樹脂カバー24上面に当接して、弾性部材35とコンタクトガラス20との間に、突出部40L、40Rの位置近傍において隙間Δtが形成される。この隙間Δtの長さΔt2は、前記実施形態1での隙間Δtの長さΔt1よりも小値(Δt2<Δt1)に設定される。すなわち、本実施形態では、前記実施形態1での移動機構47を備えない関係上、隙間Δtの長さΔt2は、写真原稿Gの原稿読取時には干渉縞mの発生がなく、しかも通常原稿Gの原稿読取時には印刷文字の滲みや掠れがない程度の長さに設定される。 In the protruding portions 40L and 40R, the horizontal plate 42 projects from the main body frame 16 of the document cover 15 toward the contact glass 20, and when the document cover 15 is closed, the horizontal plate 42 is the upper surface of the resin cover 24 of the document mounting table 13. A gap Δt is formed between the elastic member 35 and the contact glass 20 in the vicinity of the positions of the protrusions 40L and 40R. The length Δt2 of the gap Δt is set to a smaller value (Δt2 <Δt1) than the length Δt1 of the gap Δt in the first embodiment. That is, in the present embodiment, since the moving mechanism 47 in the first embodiment is not provided, the length Δt2 of the gap Δt does not generate the interference fringe m when the photographic document G is read, and the normal document G has no interference fringes m. When scanning the original, the length is set so that the printed characters are not blurred or blurred.

従って、本実施形態では、突出部40L、40Rのみを設けることによって、通常原稿Gの画像読み取りを良好に維持しつつ、写真原稿Gの原稿読取時には、干渉縞mの発生が抑制されたきれいな読取画像を得ることができる。しかも、実施形態1のように移動機構47を備えないので、構成を簡易にできる。 Therefore, in the present embodiment, by providing only the protrusions 40L and 40R, the image reading of the normal original G is maintained well, and the occurrence of the interference fringes m is suppressed when the photographic original G is read. You can get an image. Moreover, since the moving mechanism 47 is not provided as in the first embodiment, the configuration can be simplified.

本発明は、その精神又は主要な特徴から逸脱することなく、他の種々な形で実施することができる。そのため、上述の実施形態は例示に過ぎず、限定的に解釈してはならない。本発明の特許請求の範囲の均等範囲に属する変形や変更は、全て本発明の範囲内のものである。 The present invention can be practiced in various other forms without departing from its spirit or key features. Therefore, the above embodiments are merely examples and should not be construed in a limited manner. All modifications and modifications belonging to the equivalent scope of the claims of the present invention are within the scope of the present invention.

例えば、実施形態1及び2では、2つの突出部40L、40Rを設けたが、その個数は2個に限定されない。また、突出部40L、40Rによって弾性部材35とコンタクトガラス20との間に形成する隙間Δtの範囲は、2L判の写真原稿Gの全面よりも多少広い範囲を例示したが、この範囲に限定されるものではない。 For example, in the first and second embodiments, two protrusions 40L and 40R are provided, but the number thereof is not limited to two. Further, the range of the gap Δt formed between the elastic member 35 and the contact glass 20 by the protrusions 40L and 40R is exemplified as a range slightly wider than the entire surface of the 2L size photographic document G, but is limited to this range. It's not something.

また、2つの突出部40L、40Rを原稿カバー15の回動支軸f側に配置したが、原稿カバー15の前後方向に複数個(例えば2個)配置してもよい。例えば、原稿カバー15の閉位置時にコンタクトガラス20の左端部、すなわち前後方向に延びる樹脂カバー25上に位置付けられるように突出部40L、40Rを原稿カバー15に配置してもよい。 Further, although the two protrusions 40L and 40R are arranged on the rotation support shaft f side of the document cover 15, a plurality (for example, two) may be arranged in the front-rear direction of the document cover 15. For example, the projecting portions 40L and 40R may be arranged on the document cover 15 so as to be positioned on the left end portion of the contact glass 20, that is, the resin cover 25 extending in the front-rear direction when the document cover 15 is closed.

更に、実施形態1の移動機構47は、偏心カム48を備えた構成を例示したが、その他、直線運動をする山形状の直動カムを備えて突出部40L、40Rを移動させる機構等を採用したり、電磁ソレノイドを用いて突出部40L、40Rを電磁力で移動させる構成を採用してもよい。また、偏心カム48を手動で移動させる機構を採用してもよい。この手動式の移動機構を採用した場合には、原稿カバー15の位置変更があったことを例えば第2操作部18の表示画面18aに表示したり、報知してもよい。加えて、原稿カバー15は中折れ用ヒンジ17を備えた構成を採用したが、中折れ機能を有しない通常の平板状の原稿カバーであってもよい。 Further, the moving mechanism 47 of the first embodiment illustrates the configuration provided with the eccentric cam 48, but in addition, a mechanism or the like provided with a mountain-shaped linear motion cam having a linear motion to move the protrusions 40L and 40R is adopted. Alternatively, a configuration may be adopted in which the protrusions 40L and 40R are moved by electromagnetic force using an electromagnetic solenoid. Further, a mechanism for manually moving the eccentric cam 48 may be adopted. When this manual movement mechanism is adopted, for example, the display screen 18a of the second operation unit 18 may be displayed or notified that the position of the document cover 15 has been changed. In addition, although the document cover 15 has adopted the configuration provided with the hinge for center folding, it may be a normal flat plate-shaped document cover having no center folding function.

また、実施形態1では、第2操作部18の表示画面18aを用いて原稿Gの画像読取動作の指示や、読取画像の表示を行ったが、これらの指示や表示は第1操作部11の表示画面11aを用いて行ってもよい。 Further, in the first embodiment, the display screen 18a of the second operation unit 18 is used to instruct the image reading operation of the document G and display the scanned image, but these instructions and displays are given by the first operation unit 11. This may be done using the display screen 11a.

本発明は、写真原稿又は光沢性を有する原稿であっても、その原稿読取時には干渉縞の発生が十分に抑制された読取画像を得ることができるので、原稿読取装置に適用して、有用である。 INDUSTRIAL APPLICABILITY The present invention is useful when applied to a document reader because it is possible to obtain a scanned image in which the generation of interference fringes is sufficiently suppressed when the document is read, even if it is a photographic original or a glossy original. be.

1 画像処理装置
2 画像形成装置
5 原稿読取装置
13 原稿載置台
15 原稿カバー
18 第2操作部
18a 表示画面
G 原稿
20 コンタクトガラス(原稿載置部)
22 原稿読取部
28 開閉ヒンジ
f 回動支軸
35 弾性部材
40L、40R 突出部
47 移動機構
48 偏心カム
Δt1 隙間の長さ
60 制御部
63 モータ
67 原稿種別選択画面(原稿種別選択部)
69 確認画面
70 画像調整用の操作ボタン(調整操作ボタン)
m 干渉縞
1 Image processing device 2 Image forming device 5 Manuscript reading device 13 Manuscript mounting table 15 Manuscript cover 18 Second operation unit 18a Display screen G Manuscript 20 Contact glass (manuscript mounting unit)
22 Document reading unit 28 Opening / closing hinge f Rotating support shaft 35 Elastic member 40L, 40R Protruding unit 47 Moving mechanism 48 Eccentric cam Δt1 Gap length 60 Control unit 63 Motor 67 Document type selection screen (Original type selection unit)
69 Confirmation screen 70 Operation buttons for image adjustment (adjustment operation buttons)
m interference fringes

Claims (9)

原稿が載置される透明な原稿載置部、及び、前記原稿載置部に載置された原稿を読み取る原稿読取部を有する原稿載置台と、
回動支軸を中心に、前記原稿載置部を覆う閉位置と開放する開位置とに回動可能に前記原稿載置台に支持される原稿カバーとを備えた原稿読取装置であって、
前記原稿カバーは、
前記原稿載置部と対応する位置に配置された所定の厚さを有する弾性部材と、
前記弾性部材の配置位置とは異なる位置に配置され、前記原稿載置台側に突出する突出部とを有し、
前記弾性部材は、前記原稿カバーが前記閉位置のとき、前記突出部が前記原稿載置台に当接することによって、前記弾性部材の前記突出部の配置位置側が前記原稿載置部から浮き上がる方向に移動した状態で前記原稿載置部上に配置される
ことを特徴とする原稿読取装置。
A transparent document mounting section on which the document is placed, and a document mounting table having a document reading section for reading the document mounted on the document mounting section.
A document reading device provided with a document cover that is rotatably supported by the document mounting table in a closed position that covers the document mounting portion and an open position that covers the document mounting portion around a rotation support shaft.
The manuscript cover is
An elastic member having a predetermined thickness arranged at a position corresponding to the document placing portion, and an elastic member having a predetermined thickness.
It is arranged at a position different from the arrangement position of the elastic member, and has a protruding portion protruding toward the document mounting table side.
When the document cover is in the closed position, the elastic member moves in a direction in which the projection position side of the elastic member is lifted from the document mounting portion by abutting the projecting portion on the document mounting table. A document reading device characterized in that it is placed on the document placing portion in the state of being placed.
前記弾性部材における前記突出部の配置位置側は、前記突出部が前記原稿載置台に当接することによって、前記原稿載置部と前記弾性部材との間に隙間が形成されている
ことを特徴とする請求項1に記載の原稿読取装置。
The position side of the protruding portion of the elastic member is characterized in that a gap is formed between the document mounting portion and the elastic member by abutting the protruding portion on the document mounting table. The document reading device according to claim 1.
前記突出部は、前記原稿カバーにおける前記回動支軸側に配置されている
ことを特徴とする請求項1又は2に記載の原稿読取装置。
The document reading device according to claim 1 or 2, wherein the projecting portion is arranged on the rotation support shaft side of the document cover.
前記突出部は、移動機構によって前記原稿載置台側に移動可能に前記原稿カバーに支持されており、
前記移動機構は、
前記突出部を、前記原稿載置台と当接しない第1位置と、前記原稿載置台と当接する第2位置とに移動させる
ことを特徴とする請求項1~3の何れか1項に記載の原稿読取装置。
The protrusion is supported by the document cover so as to be movable toward the document mounting table by a moving mechanism.
The movement mechanism is
The one according to any one of claims 1 to 3, wherein the protruding portion is moved to a first position that does not abut on the document mounting table and a second position that contacts the document mounting table. Document reader.
前記移動機構を制御する制御部と、
操作者による前記原稿読取部の原稿読取動作の指示を受け付ける操作部と、を有し、
前記制御部は、
前記操作部が受け付けた原稿読取動作の内容に応じて前記突出部を移動させるように前記移動機構を制御する、
ことを特徴とする請求項4に記載の原稿読取装置。
A control unit that controls the movement mechanism,
It has an operation unit that receives an instruction of a document reading operation of the document reading unit by an operator.
The control unit
The movement mechanism is controlled so as to move the protrusion according to the content of the document reading operation received by the operation unit.
The document reading apparatus according to claim 4.
前記操作部は、操作者が原稿の種別を選択する原稿種別選択部を有し、
前記制御部は、
前記原稿種別選択部によって、予め定めた特定の種別の原稿が選択された場合に、前記突出部を前記第2位置に移動させるように前記移動機構を制御する
ことを特徴とする請求項5に記載の原稿読取装置。
The operation unit has a document type selection unit in which an operator selects a document type.
The control unit
5. The fifth aspect of the present invention is characterized in that, when a predetermined specific type of document is selected by the document type selection unit, the movement mechanism is controlled so as to move the protrusion to the second position. The document reader described.
前記予め定めた特定の種別の原稿は、写真原稿又は光沢性を有する原稿である
ことを特徴とする請求項6に記載の原稿読取装置。
The document reading device according to claim 6, wherein the predetermined type of original is a photographic original or a glossy original.
前記操作部は、前記原稿読取部の原稿読取動作によって得られた読取画像を表示する確認画面と、該確認画面に表示された読取画像を調整する調整操作ボタンとを有し、
前記制御部は、
前記確認画面での読取画像の表示時に前記調整操作ボタンの操作に応じて、前記弾性部材と前記原稿載置部との間の隙間を調整するように、前記移動機構を制御する
ことを特徴とする請求項5~7の何れか1項に記載の原稿読取装置。
The operation unit has a confirmation screen for displaying a scanned image obtained by the document scanning operation of the document scanning unit, and an adjustment operation button for adjusting the scanned image displayed on the confirmation screen.
The control unit
The feature is that the moving mechanism is controlled so as to adjust the gap between the elastic member and the document placing portion in response to the operation of the adjustment operation button when the scanned image is displayed on the confirmation screen. The document reading device according to any one of claims 5 to 7.
前記請求項1~8の何れか1項に記載の原稿読取装置を備えた
ことを特徴とする画像形成装置。
An image forming apparatus comprising the document reading apparatus according to any one of claims 1 to 8.
JP2020194577A 2020-11-24 2020-11-24 Document reading device and image forming apparatus including the same Pending JP2022083242A (en)

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Country Link
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