JP3750266B2 - Document feeding device - Google Patents

Document feeding device Download PDF

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Publication number
JP3750266B2
JP3750266B2 JP08496397A JP8496397A JP3750266B2 JP 3750266 B2 JP3750266 B2 JP 3750266B2 JP 08496397 A JP08496397 A JP 08496397A JP 8496397 A JP8496397 A JP 8496397A JP 3750266 B2 JP3750266 B2 JP 3750266B2
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JP
Japan
Prior art keywords
roller
document
retard
rotational force
paper feed
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Expired - Fee Related
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JP08496397A
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Japanese (ja)
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JPH10279099A (en
Inventor
孝夫 荒木
克司 市丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、原稿を繰出す原稿繰出装置に関するものである。
【0002】
【従来の技術】
近年、原稿から画像を読取るため、画像読取装置が広く用いられている。そして、この画像読取装置には、原稿を画像読取装置に自動給紙するために、原稿繰出装置が設けられていることが多い。さて原稿には、一枚ずつバラバラのものの他、複葉紙もある。複葉紙とは、複数の用紙の上辺をのり等でとじて構成される伝票などである。そして、原稿繰出装置を用いて、複葉紙を原稿読取装置へ給紙し、複葉紙の一番上の面を読み取るのである。
【0003】
次に、図2、図3を用いて、複葉紙の給紙に対応した従来の原稿繰出装置について説明する。図2に示すように、原稿1は、矢印M1方向に回転する給紙ローラ2に周接して搬送方向Nに送られる。給紙ローラ2の搬送方向N下流側には、分離ローラ3とリタードローラ4の対があり、分離ローラ3は、矢印M2方向に回転して、原稿1を搬送方向Nに送る。これと対をなすリタードローラ4は、通常(一枚ずつバラバラの原稿の場合)実線位置にあって矢印M3方向(搬送方向Nの反対方向へ戻す向き)に回転し、原稿1のうち、最上段にあるもののみを通過させ、それ以外を搬送方向Nの反対方向へ戻すように動作する。
【0004】
しかしながら、複葉紙を繰り出す場合、リタードローラ4を通常通り動作させると、複葉紙を構成する各葉間でズレ運動が発生し、とじしろが破損したり、折れ曲がってしまうなどのトラブルを生ずる。そこで、複葉紙を繰り出す場合には、軸支部6を中心にしてレバー5を矢印N2方向へ揺動させ、レバー5の先端部で、リタードローラ4を支持し回動中心7aにより回動する支持部7を、矢印N3方向へ押し下げ、分離ローラ3とリタードローラ4とを離間させるようにしていた。これにより、リタードローラ4が、複葉紙(原稿1)に接触せず、上記トラブルを回避するようにしていた。
【0005】
このほか、図3に示すように、分離ローラ3が軸着される駆動シャフト8の端部に分離ギア9を固定し、リタードローラ4が軸着されるリタードシャフト12の端部にリタードギア11を固定し、分離ギア9とリタードギア11とを、アイドラ10により、結合する例もある。この例では、通常(一枚ずつバラバラの原稿の場合)、アイドラ10を、軸支部14を中心に揺動する押付レバー13の先端部により、分離ギア9とリタードギア11とに押しつけておき、分離ギア9とリタードギア11とを連結している。そして、複葉紙の原稿1を繰り出す際には、押付レバー13の先端部を矢印N5方向にあげて、アイドラ10を分離ギア9、リタードギア11から外し、リタードギア11に回転力が伝達されないようにしていた。こうすることにより、リタードローラ4をフリーにして、リタードローラ4を分離ローラ3につれ周りさせ、上記トラブルを回避するものである。
【0006】
【発明が解決しようとする課題】
しかしながら、上述のいずれの従来技術においても、レバー5や押付レバー13というようなメカニカルな切替手段を用いて、一枚ずつバラバラの原稿の場合と複葉紙の場合とを、機械的動作に依存して切り替えていた。このようにすると、メカニカルな切替手段のためだけの配置スペースが必要となり、こみ入った原稿読取装置内に設けにくいし、メカニカルな動作が不完全になりやすく、複葉紙を破損しがちであるという問題点があった。
【0007】
そこで本発明は、複葉紙を破損せずに供給できる原稿繰出装置を提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明の原稿繰出装置は、正逆両方向の回転力を発生する駆動源と、原稿を搬送方向へ送る給紙ローラと、前記給紙ローラよりも搬送方向下流側に位置し原稿を搬送方向へ送る分離ローラと、前記分離ローラに対して対をなすように配置され最上段にない原稿を搬送方向の逆方向に戻すリタードローラと、前記駆動源の回転力を前記給紙ローラ、前記分離ローラ及び前記リタードローラに伝達する伝動機構とを備え、
前記伝動機構は、前記原稿が複葉紙でない場合、前記駆動源の正方向の回転力によって前記給紙ローラと前記分離ローラとを原稿を搬送方向へ送る方向へ回転させると共に、前記リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、前記原稿が複葉紙である場合、前記駆動源の逆方向の回転力によって前記給紙ローラと前記分離ローラと前記リタードローラとを原稿を搬送方向へ送る方向へ回転させるものである。
【0009】
また、伝動機構は、駆動源の回転力が正方向であるとき、給紙ローラと分離ローラを原稿を搬送方向へ送る方向へ回転させると共に、リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、駆動源の回転力が逆方向であるとき、給紙ローラと分離ローラとを原稿を搬送方向へ送る方向へ回転させ、リタードローラへの駆動力を遮断する。
【0010】
【発明の実施の形態】
請求項1記載の原稿繰出装置は、正逆両方向の回転力を発生する駆動源と、原稿を搬送方向へ送る給紙ローラと、前記給紙ローラよりも搬送方向下流側に位置し原稿を搬送方向へ送る分離ローラと、前記分離ローラに対して対をなすように配置され最上段にない原稿を搬送方向の逆方向に戻すリタードローラと、前記駆動源の回転力を前記給紙ローラ、前記分離ローラ及び前記リタードローラに伝達する伝動機構とを備え、
前記伝動機構は、前記原稿が複葉紙でない場合、前記駆動源の正方向の回転力によって前記給紙ローラと前記分離ローラとを原稿を搬送方向へ送る方向へ回転させると共に、前記リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、前記原稿が複葉紙である場合、前記駆動源の逆方向の回転力によって前記給紙ローラと前記分離ローラと前記リタードローラとを原稿を搬送方向へ送る方向へ回転させるものである。この構成により、複葉紙の原稿を給紙する際、駆動源の回転力の方向を切り替えることのみにより、リタードローラを分離ローラとつれ回りする方向に回転させることができ、複葉紙の破損などのトラブルを回避できる。
【0011】
請求項2記載の原稿繰出装置は、正逆両方向の回転力を発生する駆動源と、原稿を搬送方向へ送る給紙ローラと、給紙ローラよりも搬送方向下流側に位置し原稿を搬送方向へ送る分離ローラと、分離ローラに対して対をなすように配置され最上段にない原稿を搬送方向の逆方向に戻すリタードローラと、駆動源の回転力を給紙ローラ、分離ローラ及びリタードローラに伝達する伝動機構とを備え、伝動機構は、駆動源の回転力が正方向であるとき、給紙ローラと分離ローラを原稿を搬送方向へ送る方向へ回転させると共に、リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、駆動源の回転力が逆方向であるとき、給紙ローラと分離ローラとを原稿を搬送方向へ送る方向へ回転させ、リタードローラへの駆動力を遮断する。この構成により、複葉紙の原稿を給紙する際、駆動源の回転力の方向を切り替えることのみにより、リタードローラをフリーにして、分離ローラにつれ周りさせることができ、複葉紙の破損などのトラブルを回避できる。
【0012】
次に図面を参照しながら、本発明の実施の形態について説明する。ここで、図1は、本発明の一実施の形態における原稿繰出装置の斜視図である。図1に示すように、この原稿繰出装置は、正逆両方向の回転力を発生する駆動源としての給紙モータ18と、給紙モータ18の回転力の方向を制御する制御部Cと、原稿を搬送方向Nに送る給紙ローラ15と、給紙ローラ15よりも搬送方向N下流側に位置し原稿を搬送方向Nへ送る分離ローラ16と、分離ローラ16に対して対をなすように配置され最上段にない原稿を搬送方向Nの逆方向に戻すとともに、トルクリミッタ17aを内蔵するリタードローラ17と、給紙モータ18の回転力を、給紙ローラ15、分離ローラ16、リタードローラ17に伝達する伝動機構20とを有する。
【0013】
次に、伝動機構20の詳細を説明する。19は給紙モータ18の出力軸である。この出力軸19に軸着されるモータギア21は、出力軸19の回転方向(実線矢印は正転、破線矢印は逆転である)と同方向に回転する。モータギア21には、第1ギア22が噛合し、第1ギア22は、フレーム24に回転自在に軸支される第1シャフト23に軸着されている。
【0014】
また、第1シャフト23のうち、第1ギア22から離れた位置には、第2ギア25が軸着されている。そして、第1ギア22には、第4ギア28と第5ギア29の二つの歯車が噛合している。さらに、第5ギア29は、第6ギア30と噛合している。
【0015】
この第4ギア28と第6ギア30とは、同一の中継シャフト31に軸支されているのであるが、第4ギア28と第6ギア30とは、それぞれワンウエイクラッチ32、33を内蔵しており、中継シャフト31は、出力軸19が正転するとき、第6ギア30がワンウエイクラッチ33により空転し、第4ギア28を経由して第1ギア22の回転力が伝達され、矢印M4方向に回転する。また、中継シャフト31は、出力軸19が逆転するとき、第4ギア28がワンウエイクラッチ32により空転し、第5ギア29と第6ギア30を経由して第1ギア22の回転力が伝達され、矢印M4方向に回転する。即ち、中継シャフト31は、出力軸19の回転方向が正逆のいずれであっても、矢印M4方向に回転するようになっている。
【0016】
さらに、中継シャフト31は、分離ローラ16を保持する分離シャフト34に対して、プーリ35、36、ベルト37によって連結され、分離ローラ16は、中継シャフト31とともに、出力軸19の回転方向の如何にかかわらず、原稿を搬送方向N方向へ送るように回転する。同様に、給紙ローラ15を保持する給紙シャフト38は、分離シャフト34に対して、プーリ39、40、ベルト41によって連結され、給紙ローラ15は、分離ローラ16とともに、出力軸19の回転方向の如何にかかわらず、原稿を搬送方向N方向へ送るように回転する。
【0017】
また、第2ギア25には、リタードシャフト27の端部に軸着される第3ギア26が噛合し、リタードシャフト27には、リタードローラ17が保持されている。したがって、リタードローラ17は、出力軸19が正転すると、原稿を搬送方向Nの反対方向へ戻す向きに回転し、出力軸19が逆転すると、原稿を搬送方向Nへ送る向きに回転する。
【0018】
次に、本形態の原稿繰出装置の動作について説明する。まず、複葉紙でない通常の原稿を給紙する際には、制御部Cが給紙モータ18の回転方向を正転に設定する。このため、給紙ローラ15と分離ローラ16とは、原稿を搬送方向Nに送るように回転し、リタードローラ17は、原稿を搬送方向Nの逆向きに戻すように回転する。
【0019】
一方、複葉紙の原稿を給紙する際には、制御部Cが給紙モータ18の回転方向を逆転に設定する。このため、給紙ローラ15と分離ローラ16とリタードローラ17とは、原稿を搬送方向Nに送るように回転し、複葉紙の破損などのトラブルが回避される。ここで、複葉紙に対応するには、単に給紙モータ18の回転方向を切り替えさせすれば良く、そのためだけにメカニカルな機構を追加する必要はない。このため、メカニカルな機構のための配置スペースは不要であり、しかも、電気的な切替により確実に複葉紙に対応することができる。
【0020】
なお、複葉紙を送る際に、リタードローラ17の駆動を解除するには、例えば、リタードシャフト27と第3ギア26との間に、実線矢印の向きの回転のみを伝えるワンウエイクラッチを設けるなどすればよい。
【0021】
【発明の効果】
本発明によれば、トラブルを生ずることなく、確実に複葉紙を給紙でき、しかも複葉紙に対応するための特別の配置スペースが不要である。
【図面の簡単な説明】
【図1】本発明の一実施の形態における原稿繰出装置の斜視図
【図2】従来の原稿繰出装置の断面図
【図3】従来の原稿繰出装置の斜視図
【符号の説明】
15 給紙ローラ
16 分離ローラ
17 リタードローラ
18 給紙モータ
20 伝動機構
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a document feeding device that feeds a document.
[0002]
[Prior art]
In recent years, image reading apparatuses have been widely used to read images from documents. In many cases, the image reading apparatus is provided with a document feeding device for automatically feeding a document to the image reading apparatus. The manuscripts are not only one piece at a time, but also double-leaf paper. Bileaf paper is a slip or the like formed by binding the upper sides of a plurality of sheets with glue or the like. Then, using the document feeding device, the bi-leaf paper is fed to the manuscript reading device, and the uppermost surface of the bi-leaf paper is read.
[0003]
Next, referring to FIGS. 2 and 3, a conventional document feeding device corresponding to the feeding of bileaf paper will be described. As shown in FIG. 2, the document 1 is fed in the conveyance direction N in contact with the paper feed roller 2 that rotates in the direction of the arrow M1. On the downstream side in the conveyance direction N of the paper feed roller 2, there is a pair of a separation roller 3 and a retard roller 4, and the separation roller 3 rotates in the direction of arrow M <b> 2 and sends the document 1 in the conveyance direction N. The retard roller 4 paired therewith is normally (in the case of separate documents one by one) and rotates in the direction of the solid line in the direction of arrow M3 (in the direction returning to the direction opposite to the conveyance direction N). Only the one on the upper stage is allowed to pass, and the others are moved back in the direction opposite to the conveyance direction N.
[0004]
However, when the double-leaf paper is fed out, if the retard roller 4 is operated as usual, a shift movement occurs between the leaves constituting the double-leaf paper, causing troubles such as breakage of the binding margin and bending. Therefore, when feeding out the double-leaf paper, the lever 5 is swung in the direction of the arrow N2 around the shaft support 6, and the retard roller 4 is supported at the tip of the lever 5 and supported by the rotation center 7a. The part 7 is pushed down in the direction of the arrow N3 so that the separation roller 3 and the retard roller 4 are separated from each other. As a result, the retard roller 4 does not come into contact with the double-leaf paper (original 1), thereby avoiding the above trouble.
[0005]
In addition, as shown in FIG. 3, the separation gear 9 is fixed to the end of the drive shaft 8 on which the separation roller 3 is pivotally attached, and the retard gear 11 is attached to the end of the retard shaft 12 on which the retard roller 4 is pivotally attached. There is also an example in which the separation gear 9 and the retard gear 11 are coupled by an idler 10 while being fixed. In this example, the idler 10 is normally pressed against the separation gear 9 and the retard gear 11 by the tip of the pressing lever 13 that swings about the shaft support portion 14 (in the case of separate documents one by one). The gear 9 and the retard gear 11 are connected. When the double-sheet paper document 1 is fed out, the tip of the pressing lever 13 is raised in the direction of the arrow N5 so that the idler 10 is removed from the separation gear 9 and the retard gear 11 so that no rotational force is transmitted to the retard gear 11. It was. By doing so, the retard roller 4 is made free, and the retard roller 4 is rotated around the separation roller 3 to avoid the above trouble.
[0006]
[Problems to be solved by the invention]
However, in any of the above-described conventional techniques, the case of separate originals and the case of bi-leaf papers depend on the mechanical operation using mechanical switching means such as the lever 5 and the pressing lever 13. And switched. In this case, an arrangement space only for the mechanical switching means is required, and it is difficult to provide in the document reading apparatus, and the mechanical operation is likely to be incomplete, and the double-leaf paper tends to be damaged. There was a problem.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a document feeding device that can supply bi-leaf paper without damaging it.
[0008]
[Means for Solving the Problems]
The document feeding device according to the present invention includes a driving source that generates rotational force in both forward and reverse directions, a paper feed roller that feeds the document in the transport direction, and a downstream side of the paper feed roller in the transport direction. A separation roller that feeds, a retard roller that is arranged so as to be paired with the separation roller and returns a document not on the uppermost stage in a direction opposite to the conveyance direction, and a rotational force of the driving source that supplies the feeding roller and the separation roller And a transmission mechanism for transmitting to the retard roller,
The transmission mechanism rotates the paper feed roller and the separation roller in a direction of feeding the document in the transport direction by the forward rotational force of the driving source when the document is not a bi-leaf paper, and the retard roller is moved to the document. When the original is a double-leaf paper, the paper feeding roller, the separation roller, and the retard roller are moved in the direction in which the original is fed by the reverse rotational force of the drive source. It is rotated in the direction to send to.
[0009]
Further, the transmission mechanism rotates the feed roller and the separation roller in the direction of feeding the document in the transport direction when the rotational force of the drive source is in the forward direction, and returns the retard roller to the direction opposite to the transport direction. When the rotational force of the drive source is in the opposite direction, the paper feed roller and the separation roller are rotated in the direction of feeding the document in the transport direction, and the drive force to the retard roller is interrupted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The document feeding device according to claim 1 is a drive source that generates rotational force in both forward and reverse directions, a feed roller that feeds the document in the transport direction, and a document that is positioned downstream of the feed roller in the transport direction and transports the document. A separation roller that feeds in a direction, a retard roller that is arranged to make a pair with the separation roller and returns a document that is not on the uppermost stage in a direction opposite to the conveyance direction, and a rotational force of the driving source that feeds the feeding roller, A separation roller and a transmission mechanism for transmitting to the retard roller,
The transmission mechanism rotates the paper feed roller and the separation roller in a direction of feeding the document in the transport direction by the forward rotational force of the driving source when the document is not a bi-leaf paper, and the retard roller is moved to the document. When the original is a double-leaf paper, the paper feeding roller, the separation roller, and the retard roller are moved in the direction in which the original is fed by the reverse rotational force of the drive source. It is rotated in the direction to send to. With this configuration, when feeding a bi-leaf paper document, the retard roller can be rotated in the direction of rotating with the separation roller only by switching the direction of the rotational force of the drive source, and the bi-leaf paper can be damaged. Trouble can be avoided.
[0011]
The document feeding device according to claim 2 is a drive source that generates rotational forces in both forward and reverse directions, a paper feed roller that feeds the document in the transport direction, and a document feed direction that is located downstream of the paper feed roller in the transport direction. A separation roller to be fed to the separation roller, a retard roller that is arranged so as to be paired with the separation roller and returns a document that is not on the uppermost stage in the reverse direction of the conveyance direction, and a rotational force of the driving source to feed the feed roller, the separation roller, and the retard roller The transmission mechanism rotates the paper feed roller and the separation roller in the direction of feeding the original in the conveyance direction and the retard roller conveys the original when the rotational force of the driving source is in the positive direction. When the rotational force of the drive source is in the reverse direction, rotate the paper feed roller and separation roller in the direction to feed the document in the transport direction, and cut off the drive force to the retard roller. To do. With this configuration, when feeding a bi-leaf paper document, the retard roller can be made free and swung around the separation roller only by switching the direction of the rotational force of the drive source. Can be avoided.
[0012]
Next, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a perspective view of a document feeding device according to an embodiment of the present invention. As shown in FIG. 1, the document feeding device includes a paper feed motor 18 as a drive source that generates rotational force in both forward and reverse directions, a control unit C that controls the direction of rotational force of the paper feed motor 18, and a document. Is disposed so as to be paired with the separation roller 16 and a separation roller 16 that is positioned downstream of the sheet feeding roller 15 in the conveyance direction N and that feeds a document in the conveyance direction N. The original not on the uppermost stage is returned in the direction opposite to the conveyance direction N, and the rotational force of the retard roller 17 incorporating the torque limiter 17 a and the paper feed motor 18 is applied to the paper feed roller 15, the separation roller 16, and the retard roller 17. And a transmission mechanism 20 for transmission.
[0013]
Next, details of the transmission mechanism 20 will be described. Reference numeral 19 denotes an output shaft of the paper feed motor 18. The motor gear 21 mounted on the output shaft 19 rotates in the same direction as the rotation direction of the output shaft 19 (the solid line arrow indicates normal rotation and the broken line arrow indicates reverse rotation). A first gear 22 meshes with the motor gear 21, and the first gear 22 is pivotally attached to a first shaft 23 that is rotatably supported by a frame 24.
[0014]
Further, a second gear 25 is pivotally attached to a position away from the first gear 22 in the first shaft 23. The first gear 22 is engaged with two gears, a fourth gear 28 and a fifth gear 29. Further, the fifth gear 29 meshes with the sixth gear 30.
[0015]
The fourth gear 28 and the sixth gear 30 are pivotally supported by the same relay shaft 31. However, the fourth gear 28 and the sixth gear 30 have built-in one-way clutches 32 and 33, respectively. In the relay shaft 31, when the output shaft 19 rotates in the forward direction, the sixth gear 30 is idled by the one-way clutch 33, and the rotational force of the first gear 22 is transmitted via the fourth gear 28, and the direction of the arrow M4 Rotate to. Further, in the relay shaft 31, when the output shaft 19 rotates in the reverse direction, the fourth gear 28 is idled by the one-way clutch 32, and the rotational force of the first gear 22 is transmitted via the fifth gear 29 and the sixth gear 30. , Rotate in the direction of arrow M4. In other words, the relay shaft 31 rotates in the direction of the arrow M4 regardless of whether the output shaft 19 rotates in the forward or reverse direction.
[0016]
Further, the relay shaft 31 is connected to the separation shaft 34 that holds the separation roller 16 by pulleys 35 and 36 and a belt 37. The separation roller 16 together with the relay shaft 31 depends on the rotation direction of the output shaft 19. Regardless, the document rotates in the conveyance direction N. Similarly, the paper feed shaft 38 that holds the paper feed roller 15 is connected to the separation shaft 34 by pulleys 39 and 40 and a belt 41. The paper feed roller 15 and the separation roller 16 rotate the output shaft 19. Regardless of the direction, the document is rotated so as to be fed in the conveyance direction N.
[0017]
The second gear 25 meshes with the third gear 26 that is pivotally attached to the end of the retard shaft 27, and the retard roller 17 is held on the retard shaft 27. Accordingly, the retard roller 17 rotates in a direction to return the document in the direction opposite to the conveyance direction N when the output shaft 19 rotates forward, and rotates in a direction to send the document in the conveyance direction N when the output shaft 19 reverses.
[0018]
Next, the operation of the document feeding device of this embodiment will be described. First, when feeding a normal document that is not bi-leaf paper, the controller C sets the rotation direction of the paper feed motor 18 to normal rotation. Therefore, the paper feed roller 15 and the separation roller 16 rotate so as to send the document in the transport direction N, and the retard roller 17 rotates so as to return the document in the direction opposite to the transport direction N.
[0019]
On the other hand, when feeding a bileaf original, the control unit C sets the rotation direction of the paper feed motor 18 to reverse. For this reason, the paper feed roller 15, the separation roller 16, and the retard roller 17 rotate so as to feed the document in the conveyance direction N, and troubles such as breakage of the bileaf paper are avoided. Here, in order to cope with double-leaf paper, it is only necessary to switch the rotation direction of the paper feed motor 18, and it is not necessary to add a mechanical mechanism only for that purpose. For this reason, the arrangement space for a mechanical mechanism is unnecessary, and it can respond to a double-leaf paper reliably by electrical switching.
[0020]
In order to release the drive of the retard roller 17 when feeding the double-leaf paper, for example, a one-way clutch that transmits only the rotation in the direction of the solid arrow is provided between the retard shaft 27 and the third gear 26. That's fine.
[0021]
【The invention's effect】
According to the present invention, it is possible to reliably feed the bileaf paper without causing trouble, and no special arrangement space is required for accommodating the bileaf paper.
[Brief description of the drawings]
FIG. 1 is a perspective view of a document feeding device according to an embodiment of the present invention. FIG. 2 is a sectional view of a conventional document feeding device. FIG. 3 is a perspective view of a conventional document feeding device.
15 Feed roller 16 Separation roller 17 Retard roller 18 Feed motor 20 Transmission mechanism

Claims (2)

正逆両方向の回転力を発生する駆動源と、原稿を搬送方向へ送る給紙ローラと、前記給紙ローラよりも搬送方向下流側に位置し原稿を搬送方向へ送る分離ローラと、前記分離ローラに対して対をなすように配置され最上段にない原稿を搬送方向の逆方向に戻すリタードローラと、前記駆動源の回転力を前記給紙ローラ、前記分離ローラ及び前記リタードローラに伝達する伝動機構とを備え、
前記伝動機構は、前記原稿が複葉紙でない場合、前記駆動源の正方向の回転力によって前記給紙ローラと前記分離ローラとを原稿を搬送方向へ送る方向へ回転させると共に、前記リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、前記原稿が複葉紙である場合、前記駆動源の逆方向の回転力によって前記給紙ローラと前記分離ローラと前記リタードローラとを原稿を搬送方向へ送る方向へ回転させることを特徴とする原稿繰出装置。
A driving source that generates rotational force in both forward and reverse directions, a paper feed roller that feeds a document in the transport direction, a separation roller that is located downstream of the paper feed roller in the transport direction and sends a document in the transport direction, and the separation roller A retard roller arranged in a pair with respect to the original and returning a document not on the uppermost stage in the reverse direction of the conveyance direction, and a transmission for transmitting the rotational force of the drive source to the paper feed roller, the separation roller, and the retard roller With a mechanism,
The transmission mechanism rotates the paper feed roller and the separation roller in a direction of feeding the document in the transport direction by the forward rotational force of the driving source when the document is not a bi-leaf paper, and the retard roller is moved to the document. When the original is a double-leaf paper, the paper feeding roller, the separation roller, and the retard roller are moved in the direction in which the original is fed by the reverse rotational force of the drive source. A document feeding device, wherein the document feeding device is rotated in the direction of feeding to the document.
正逆両方向の回転力を発生する駆動源と、原稿を搬送方向へ送る給紙ローラと、前記給紙ローラよりも搬送方向下流側に位置し原稿を搬送方向へ送る分離ローラと、前記分離ローラに対して対をなすように配置され最上段にない原稿を搬送方向の逆方向に戻すリタードローラと、前記駆動源の回転力を前記給紙ローラ、前記分離ローラ及び前記リタードローラに伝達する伝動機構とを備え、
前記伝動機構は、前記駆動源の回転力が正方向であるとき、前記給紙ローラと前記分離ローラを原稿を搬送方向へ送る方向へ回転させると共に、前記リタードローラを原稿を搬送方向の逆方向へ戻すように回転させ、前記駆動源の回転力が逆方向であるとき、前記給紙ローラと前記分離ローラとを原稿を搬送方向へ送る方向へ回転させ、前記リタードローラへの駆動力を遮断することを特徴とする原稿繰出装置。
A driving source that generates rotational force in both forward and reverse directions, a paper feed roller that feeds a document in the transport direction, a separation roller that is located downstream of the paper feed roller in the transport direction and sends a document in the transport direction, and the separation roller A retard roller arranged in a pair with respect to the original and returning a document not on the uppermost stage in the reverse direction of the conveyance direction, and a transmission for transmitting the rotational force of the drive source to the paper feed roller, the separation roller, and the retard roller With a mechanism,
The transmission mechanism rotates the paper feed roller and the separation roller in a direction to feed the document in the transport direction when the rotational force of the driving source is in the forward direction, and the retard roller rotates in the direction opposite to the document transport direction. When the rotational force of the drive source is in the reverse direction, the feed roller and the separation roller are rotated in the direction of feeding the document in the transport direction, and the drive force to the retard roller is cut off. A document feeding device characterized in that:
JP08496397A 1997-04-03 1997-04-03 Document feeding device Expired - Fee Related JP3750266B2 (en)

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JP08496397A JP3750266B2 (en) 1997-04-03 1997-04-03 Document feeding device

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Application Number Priority Date Filing Date Title
JP08496397A JP3750266B2 (en) 1997-04-03 1997-04-03 Document feeding device

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JPH10279099A JPH10279099A (en) 1998-10-20
JP3750266B2 true JP3750266B2 (en) 2006-03-01

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CN112645090A (en) * 2019-10-09 2021-04-13 京瓷办公信息***株式会社 Document feeding device

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