JP3555361B2 - Image reading device - Google Patents

Image reading device Download PDF

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Publication number
JP3555361B2
JP3555361B2 JP31748696A JP31748696A JP3555361B2 JP 3555361 B2 JP3555361 B2 JP 3555361B2 JP 31748696 A JP31748696 A JP 31748696A JP 31748696 A JP31748696 A JP 31748696A JP 3555361 B2 JP3555361 B2 JP 3555361B2
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Japan
Prior art keywords
document
scanner device
continuous
reading
scanner
Prior art date
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Expired - Fee Related
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JP31748696A
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Japanese (ja)
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JPH10164312A (en
Inventor
題詞 小西
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Murata Machinery Ltd
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Murata Machinery Ltd
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Priority to JP31748696A priority Critical patent/JP3555361B2/en
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  • Facsimile Scanning Arrangements (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、原稿に記載されている画像を読み取るための画像読取装置に関するものである。
【0002】
【従来の技術】
画像読取装置は、静止原稿読取機能と連続原稿読取機能とを併備したものがある。静止原稿読取の場合には、プラテンガラス上に置かれている原稿を、プラテンガラスの下で副走査方向へ往復移動するスキヤナ装置で走査して読み取る。連続原稿読取の場合には、回転する原稿送りローラで一枚ずつ送られる原稿を、連続原稿読取位置に静止するスキヤナ装置で走査して読み取る。
【0003】
従来の画像読取装置は、スキヤナ装置を静止原稿読取領域で往復移動させると共に静止原稿読取領域から連続原稿読取位置まで移動させるための駆動用モータと、原稿送りローラを回転させるための駆動用モータとを個別に設けていた。
【0004】
【発明が解決しようとする課題】
しかし、スキヤナ装置駆動用モータと原稿送りローラ駆動用モータとを個別に設けることは、コスト高になると共に重量大になる問題がある。そこで、本発明は、スキヤナ装置の移動と原稿送りローラの回動とを一個の駆動用モータで兼用するようにした画像読取装置を提供するものである。
【0005】
【課題を解決するための手段】
本発明が採用した手段は、静止原稿読取領域から連続原稿読取位置まで移動自在に設けたスキヤナ装置と、連続原稿読取用原稿送りローラとを備えた画像読取装置において、スキヤナ装置の移動及び原稿送りローラの回動を伝動機構を介して行う一個の駆動用モータを備え、該伝動機構は、静止原稿読取のときには静止原稿読取領域でスキヤナ装置を移動させ、連続原稿読取のときには連続原稿読取位置にスキヤナ装置を停止させると共に原稿送りローラを回動させるようにしたことである。
【0006】
本発明にあつては、一個の駆動用モータでスキヤナ装置の移動及び原稿送りローラの回動を行うことができ、静止原稿読取のときの静止原稿読取領域でのスキヤナ装置の移動と、連続原稿読取のときの連続原稿読取位置でのスキヤナ装置の停止及び原稿送りローラの回動とを伝動機構で選択できる。
【0007】
前記伝動機構は、前記スキヤナ装置を移動させる歯付ベルトに噛合する駆動プーリと、前記モータに連結し且つ該駆動プーリと一体に回転する駆動ギヤと、前記原稿送りローラを回動させる従動ギヤと、前記スキヤナ装置が連続原稿読取位置に到達するときにスキヤナ装置と共に移動して駆動ギヤと従動ギヤとに噛合する中間ギヤとを備え、歯付ベルトは、スキヤナ装置が連続原稿読取位置に到達したときに駆動プーリと噛合しないように欠歯領域を形成してある
【0008】
前記伝動機構が前記歯付ベルト及び中間ギヤ等を備えることで、静止原稿読取のときには中間ギヤが駆動ギヤと従動ギヤとに噛合しないため、モータの駆動力が駆動プーリを介して歯付ベルトに伝達してスキヤナ装置を移動させ、連続原稿読取のときには中間ギヤが駆動ギヤと従動ギヤとに噛合すると共に駆動プーリと歯付ベルトが噛合しないため、モータの駆動力が駆動ギヤと中間ギヤと従動ギヤとに順次伝達して原稿送りローラのみを回動させる。
【0009】
本発明は、前記スキヤナ装置を連続原稿読取位置で静止させるためのストツパーを備えることもある。
【0010】
【発明の実施の形態】
以下、本発明に係る画像読取装置を図面に示す実施の形態に基づいて説明する。
【0011】
1乃至図3は本発明の実施の形態を示すものであり、図1は全体の概要を示す中間省略した側面図、図2は要部を拡大したものであつて原稿送りローラのみを回動させる状態を示す側面図、図3は要部を拡大したものであつてスキヤナ装置のみを移動させる状態を示す側面図である。
【0012】
画像読取装置1は、図1に示す如く、静止原稿読取機能と連続原稿読取機能とを併備したものである。静止原稿読取の場合には、プラテンガラス2上に置かれている原稿(図示省略)を、プラテンガラス2の下で副走査方向(矢符A方向)へ往復移動する光源を備えたスキヤナ装置3で走査して読み取る。連続原稿読取の場合には、回転する原稿送りローラ4で一枚ずつ送られる原稿を、連続原稿読取位置Cに静止するスキヤナ装置3で走査して読み取る。
【0013】
該画像読取装置1の特徴は、スキヤナ装置3の移動と原稿送りローラ4の回動とを、伝動機構5を介して一個の駆動用モータ6で選択できるようにしたことである。伝動機構5は、静止原稿読取のときには静止原稿読取領域Bでスキヤナ装置3を往復移動させ、連続原稿読取のときには連続原稿読取位置Cにスキヤナ装置3を停止させると共に原稿送りローラ4のみを回動させるように構成してある。
【0014】
該伝動機構5は、副走査方向(矢符A方向)の両端寄りに配置した歯付ベルト用プーリ7,8と、両プーリ7,8間に張架し且つスキヤナ装置3に連結13したエンドレス状の歯付ベルト9と、図2に示すモータ6の出力軸6aに連結し且つ駆動プーリ7と一体に回転する駆動ギヤ10と、原稿送りローラ4を回動させる従動ギヤ11と、駆動ギヤ10と従動ギヤ11との間に配置した中間ギヤ12とを備えている。中間ギヤ12は、スキヤナ装置3に回転自在に取着され、スキヤナ装置3が連続原稿読取位置Cに到達したときにのみ駆動ギヤ7と従動ギヤ8とに噛合するようになつている。歯付ベルト9は、スキヤナ装置3が連続原稿読取位置Cに到達したときに、駆動プーリ7と噛合しないように歯9aの欠如した欠歯領域9bを形成してある。
【0015】
上記中間ギヤ12は、モータ6の駆動により駆動プーリ7が矢符F方向へ回転するのに伴い、連続原稿読取位置Cに向かつて移動するスキヤナ装置3と共に移動して駆動ギヤ10及び従動ギヤ11との噛合を開始する。噛合を開始した中間ギヤ12は、駆動ギヤ10からの伝達力を受けて矢符E方向へ付勢されるので、安定した噛合を維持する。更に、スキヤナ装置3は、この付勢力を受けて、ストツパ14を押圧するように当接し、停止状態を維持する。スキヤナ装置3がストツパ14に当接して停止しているときには、歯付ベルト9の欠歯領域9bが駆動プーリ7に巻回して駆動プーリ7を空回りさせるので、モータ6の駆動力を歯付ベルト9に伝達させない。
【0016】
連続原稿読取位置Cに停止している連続原稿読取状態のスキヤナ装置3を静止原稿読取領域Bへ移動させるためには、モータ6を逆回転させる。モータ6の逆回転により駆動ギヤ10及び駆動プーリ7が矢符G方向へ回転すると、中間ギヤ12は、駆動ギヤ10からの伝達力で矢符H方向へ付勢され、スキヤナ装置3及び歯付ベルト9と共に移動を開始する。移動を開始した歯付ベルト9は、図3に示す如く、駆動プーリ7に対する歯9aの噛合を開始して、スキヤナ装置3を矢符H方向へ移動させて静止原稿読取領域B(図1参照)へ導く。
【0017】
なお、前記中間ギヤ12は、スキヤナ装置3に取着する構造に限定されるものではなく、図示は省略しが、駆動ギヤ10及び従動ギヤ11に噛合する噛合位置と両ギヤ10,11に噛合しない非噛合位置との間で、スキヤナ装置3の移動方向に沿つて摺動自在となるように配置することも可能である。この場合の中間ギヤ12は、スキヤナ装置3が静止原稿読取領域Bに位置するときには、非噛合位置に向かつてバネで付勢され、スキヤナ装置3が連続原稿読取位置Cに到達するときには、該バネの付勢力に抗してスキヤナ装置3で押圧されて噛合位置へ移動するように構成する。
【0018】
前記従動ギヤ11は、図1に示す如く、従動ギヤ11と一体に回転するプーリ15と中間プーリ16とに歯付ベルト18を張架すると共に、中間プーリ16と原稿送りローラ4と一体に回転するプーリ17とに歯付ベルト19を張架して、モータ6からの駆動力を原稿送りローラ4へ伝達するようにしてある。なお、従動ギヤ11は、原稿送りローラ4と一体に回転するように構成して、中間プーリ16等を省略することも可能である。
【0019】
前記スキヤナ装置3は、光源と受光素子とを一体に組み込んだ形式のものや、図示は省略したが、光源を歯付ベルト9で移動させると共に反射鏡を光源の移動速度の半分の速度で移動させ、固定配置した受光素子で反射光を受光する形式のものが適宜選択される。
【0020】
【発明の効果】
請求項1記載の本発明に係る画像読取装置は、スキヤナ装置の移動及び原稿送りローラの回動を一個の駆動用モータで兼用するため、コストの低減と重量の軽減とを図ることができる。更に、本発明に係る画像読取装置は、簡単な構造で実現することができるため、更にコストの低減と重量の軽減とを図ることができる。
【0021】
請求項記載の本発明に係る画像読取装置は、スキヤナ装置を静止させるためのセンサ等が不要となる。
【図面の簡単な説明】
【図1】本発明の実施の形態を示すものであり、全体の概要を示す中間省略した側面図である。
【図2】同実施の形態における要部を拡大したものであつて、原稿送りローラのみを回動させる状態を示す側面図である。
【図3】同実施の形態における要部を拡大したものであつて、スキヤナ装置のみを移動させる状態を示す側面図である。
【符号の説明】
3…スキヤナ装置
4…連続原稿読取用原稿送りローラ
5…伝動機構
6…駆動用モータ
B…静止原稿読取領域
C…連続原稿読取位置
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image reading device for reading an image described on a document.
[0002]
[Prior art]
Some image reading apparatuses have both a static original reading function and a continuous original reading function. In the case of reading a still original, the original placed on the platen glass is scanned and read by a scanner device which reciprocates in the sub-scanning direction under the platen glass. In the case of continuous document reading, a document fed one by one by a rotating document feed roller is scanned and read by a scanner that is stationary at a continuous document reading position.
[0003]
A conventional image reading apparatus includes a driving motor for reciprocating a scanner device in a stationary document reading area and moving the scanner device from the stationary document reading area to a continuous document reading position, and a driving motor for rotating a document feed roller. Was provided individually.
[0004]
[Problems to be solved by the invention]
However, providing the scanner device driving motor and the document feed roller driving motor separately increases the cost and weight. Therefore, the present invention provides an image reading apparatus in which the movement of the scanner device and the rotation of the document feed roller are shared by one drive motor.
[0005]
[Means for Solving the Problems]
Means adopted by the present invention is an image reading apparatus provided with a scanner device movably provided from a stationary document reading area to a continuous document reading position and a document feed roller for continuous document reading. A single drive motor for rotating the roller via a transmission mechanism is provided.The transmission mechanism moves the scanner device in the static original reading area when reading a static original, and moves the scanner to a continuous original reading position when reading a continuous original. That is, the scanner device is stopped and the document feed roller is rotated.
[0006]
According to the present invention, the movement of the scanner device and the rotation of the document feed roller can be performed by one drive motor, and the movement of the scanner device in the still document reading area when reading the still document, and the continuous document The stop of the scanner at the continuous document reading position and the rotation of the document feed roller at the time of reading can be selected by the transmission mechanism.
[0007]
The transmission mechanism includes a drive pulley that meshes with a toothed belt that moves the scanner device, a drive gear that is connected to the motor and rotates integrally with the drive pulley, and a driven gear that rotates the document feed roller. An intermediate gear that moves together with the scanner device when the scanner device reaches the continuous document reading position and meshes with the driving gear and the driven gear; and the toothed belt is such that the scanner device reaches the continuous document reading position. A toothless region is formed so that it sometimes does not mesh with the driving pulley.
[0008]
In Rukoto said transmission mechanism comprises said toothed belt and the intermediate gear or the like, since the intermediate gear when the read still document does not mesh with the drive gear and the driven gear, toothed belt drive force of the motor via a drive pulley When the continuous document is read, the intermediate gear meshes with the driving gear and the driven gear and the driving pulley and the toothed belt do not mesh with each other, so that the driving force of the motor is reduced by the driving gear and the intermediate gear. The document is sequentially transmitted to the driven gear and only the document feed roller is rotated.
[0009]
The present invention may include a stopper for stopping the scanner at a continuous document reading position.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an image reading apparatus according to the present invention will be described based on an embodiment shown in the drawings.
[0011]
1 through FIG. 3 shows a form of implementation of the present invention, FIG. 1 is intermediate omitted side view showing an overall outline of FIG. 2 only document feeding roller shall apply an enlarged view of the main part FIG. 3 is an enlarged side view showing a state where the scanner device is rotated, and FIG. 3 is a side view showing a state where only the scanner device is moved.
[0012]
As shown in FIG. 1, the image reading apparatus 1 has both a static original reading function and a continuous original reading function. In the case of reading a stationary document, a scanner device 3 provided with a light source that reciprocates a document (not shown) placed on the platen glass 2 in the sub-scanning direction (the direction of arrow A) under the platen glass 2. Scan and read with. In the case of continuous document reading, the document fed one by one by the rotating document feed roller 4 is scanned and read by the scanner device 3 that is stationary at the continuous document reading position C.
[0013]
The image reading apparatus 1 is characterized in that the movement of the scanner 3 and the rotation of the document feed roller 4 can be selected by a single drive motor 6 via a transmission mechanism 5. The transmission mechanism 5 reciprocates the scanner device 3 in the static document reading area B when reading a static document, stops the scanner device 3 at the continuous document reading position C when reading a continuous document, and rotates only the document feed roller 4. It is configured to make it.
[0014]
The transmission mechanism 5 includes pulleys 7 and 8 for toothed belts disposed near both ends in the sub-scanning direction (the direction of arrow A), and an endless belt 13 stretched between the pulleys 7 and 8 and connected to the scanner device 3 13. 2, a driving gear 10 connected to an output shaft 6a of a motor 6 shown in FIG. 2 and rotating integrally with the driving pulley 7, a driven gear 11 for rotating the document feed roller 4, and a driving gear An intermediate gear 12 is provided between the driven gear 10 and the driven gear 11. The intermediate gear 12 is rotatably attached to the scanner device 3 and meshes with the drive gear 7 and the driven gear 8 only when the scanner device 3 reaches the continuous document reading position C. The toothed belt 9 has a missing tooth region 9b with no teeth 9a so that the scanner device 3 does not mesh with the drive pulley 7 when the scanner device 3 reaches the continuous document reading position C.
[0015]
The intermediate gear 12 moves together with the scanner device 3 that moves toward the continuous document reading position C as the drive pulley 7 rotates in the direction of the arrow F due to the driving of the motor 6, and the drive gear 10 and the driven gear 11 Start meshing with. The intermediate gear 12 that has started meshing is urged in the direction of the arrow E by receiving the transmission force from the drive gear 10, so that stable meshing is maintained. Further, the scanner device 3 receives the biasing force and abuts on the stopper 14 so as to press the stopper 14, thereby maintaining the stopped state. When the scanner device 3 is in contact with the stopper 14 and is stopped, the toothless belt 9 is wound around the driving pulley 7 to make the driving pulley 7 idle, so that the driving force of the motor 6 is reduced by the toothed belt. 9 is not transmitted.
[0016]
In order to move the scanner 3 in the continuous original reading state stopped at the continuous original reading position C to the stationary original reading area B, the motor 6 is rotated in the reverse direction. When the drive gear 10 and the drive pulley 7 rotate in the direction of the arrow G due to the reverse rotation of the motor 6, the intermediate gear 12 is urged in the direction of the arrow H by the transmission force from the drive gear 10, and the scanning device 3 and the toothed Movement with the belt 9 is started. The toothed belt 9 that has started moving, as shown in FIG. 3, starts meshing the teeth 9a with the drive pulley 7, and moves the scanner device 3 in the direction of arrow H, thereby causing the stationary document reading area B (see FIG. 1). ).
[0017]
The intermediate gear 12 is not limited to a structure that is attached to the scanner device 3, and is not shown, but is engaged with the driving gear 10 and the driven gear 11, and meshes with the gears 10 and 11. It is also possible to arrange so as to be slidable along the moving direction of the scanner device 3 between the non-meshing position and the non-meshing position. In this case, the intermediate gear 12 is urged by a spring toward the non-meshing position when the scanner device 3 is located in the stationary document reading area B, and is pressed when the scanner device 3 reaches the continuous document reading position C. The urging force is pushed by the scanner device 3 to move to the meshing position.
[0018]
As shown in FIG. 1, the driven gear 11 stretches a toothed belt 18 around a pulley 15 and an intermediate pulley 16 which rotate integrally with the driven gear 11, and rotates integrally with the intermediate pulley 16 and the document feed roller 4. A toothed belt 19 is stretched around the pulley 17 to be driven, and the driving force from the motor 6 is transmitted to the document feed roller 4. Note that the driven gear 11 may be configured to rotate integrally with the document feed roller 4, and the intermediate pulley 16 and the like may be omitted.
[0019]
The scanner device 3 is of a type in which a light source and a light receiving element are integrally incorporated, and although not shown, the light source is moved by the toothed belt 9 and the reflecting mirror is moved at half the moving speed of the light source. Then, a type in which the fixed light receiving element receives the reflected light is appropriately selected.
[0020]
【The invention's effect】
In the image reading device according to the first aspect of the present invention, the movement of the scanner device and the rotation of the document feed roller are shared by one drive motor, so that cost and weight can be reduced. Further, since the image reading apparatus according to the present invention can be realized with a simple structure, the cost and the weight can be further reduced.
[0021]
The image reading apparatus according to the second aspect of the present invention does not require a sensor or the like for stopping the scanner.
[Brief description of the drawings]
[1] is indicative of the implementation of the embodiment of the present invention, is a side view of an intermediate omitted showing an overall outline of.
FIG. 2 is an enlarged side view of a main part in the embodiment, and is a side view showing a state in which only a document feed roller is rotated.
FIG. 3 is an enlarged side view of a main part in the embodiment, and is a side view showing a state in which only the scanner device is moved.
[Explanation of symbols]
3 Scanner device 4 Continuous document reading document feed roller 5 Transmission mechanism 6 Drive motor B Still document reading area C Continuous document reading position

Claims (2)

静止原稿読取領域から連続原稿読取位置まで移動自在に設けたスキヤナ装置と、連続原稿読取用原稿送りローラとを備えた画像読取装置において、スキヤナ装置の移動及び原稿送りローラの回動を伝動機構を介して行う一個の駆動用モータを備え、該伝動機構は、静止原稿読取のときには静止原稿読取領域でスキヤナ装置を移動させ、連続原稿読取のときには連続原稿読取位置にスキヤナ装置を停止させると共に原稿送りローラを回動させるようにしたものであって、前記伝動機構は、前記スキヤナ装置を移動させる歯付ベルトに噛合する駆動プーリと、前記モータに連結し且つ該駆動プーリと一体に回転する駆動ギヤと、前記原稿送りローラを回動させる従動ギヤと、前記スキヤナ装置が連続原稿読取位置に到達するときにスキヤナ装置と共に移動して駆動ギヤと従動ギヤとに噛合する中間ギヤとを備え、歯付ベルトは、スキヤナ装置が連続原稿読取位置に到達したときに駆動プーリと噛合しないように欠歯領域を形成したことを特徴とする画像読取装置。In an image reading apparatus provided with a scanner device movably provided from a stationary document reading area to a continuous document reading position and a document feed roller for continuous document reading, a transmission mechanism is used to transmit the movement of the scanner device and the rotation of the document feed roller. The driving mechanism moves the scanner in the static original reading area when reading a static original, and stops the scanner at the continuous original reading position and reads the original when reading a continuous original. A roller is rotated , wherein the transmission mechanism includes a drive pulley meshing with a toothed belt for moving the scanner device, and a drive gear connected to the motor and rotating integrally with the drive pulley. A driven gear for rotating the document feed roller; and a scanner device when the scanner device reaches a continuous document reading position. Moving an intermediate gear that meshes with the drive gear and the driven gear, toothed belt, to the formation of the non-toothed region so as not to drive pulley meshing when Sukiyana device reaches the continuous document reading position in An image reading apparatus characterized by the above-mentioned. 前記スキヤナ装置を連続原稿読取位置で静止させるためのストツパーを備えた請求項1記載の画像読取装置。2. The image reading apparatus according to claim 1, further comprising a stopper for stopping the scanner at a continuous document reading position.
JP31748696A 1996-11-28 1996-11-28 Image reading device Expired - Fee Related JP3555361B2 (en)

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JP3810643B2 (en) 2001-03-02 2006-08-16 シャープ株式会社 Image reading device
JP5978785B2 (en) 2012-06-08 2016-08-24 ブラザー工業株式会社 Image reading apparatus and image forming apparatus
JP6056218B2 (en) 2012-06-29 2017-01-11 ブラザー工業株式会社 Image reading apparatus and image forming apparatus
JP6031919B2 (en) 2012-09-28 2016-11-24 ブラザー工業株式会社 Image reading device
CN103716497A (en) * 2012-09-28 2014-04-09 致伸科技股份有限公司 Paper feed-type scanning device
US9288359B2 (en) * 2013-12-16 2016-03-15 Xerox Corporation Integrated platen scanner and document handler for a copier, multifunctional printer or standalone scanning device

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