JP2009220909A - Paper discharge mechanism and printer mounted with this paper discharge mechanism - Google Patents

Paper discharge mechanism and printer mounted with this paper discharge mechanism Download PDF

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JP2009220909A
JP2009220909A JP2008064369A JP2008064369A JP2009220909A JP 2009220909 A JP2009220909 A JP 2009220909A JP 2008064369 A JP2008064369 A JP 2008064369A JP 2008064369 A JP2008064369 A JP 2008064369A JP 2009220909 A JP2009220909 A JP 2009220909A
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paper
sheet
discharge mechanism
switching member
drive roller
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Kenji Eoka
健二 江岡
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Toshiba TEC Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper discharge mechanism can improve the positional accuracy of the tip alignment of paper, and improve throughput in printing, and a printer with the mechanism. <P>SOLUTION: After a paper chip conveyed by a first drive roller 2 passes a first switch member 4, paper is reversely conveyed to an upstream side in a conveying direction by a second drive roller 7. The position of the first switch member 4 is switched, and the paper is housed in a paper housing 5 from its chip. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、プリンタで複数枚の印刷された用紙を重ね合わせて、同時に排出する用紙バンチ機構を備えた用紙排出機構及びその機構を搭載したプリンタに関するものである。   The present invention relates to a paper discharge mechanism including a paper bunch mechanism for overlapping a plurality of printed sheets by a printer and simultaneously discharging the same, and a printer equipped with the mechanism.

従来、プリンタで複数枚の印刷された用紙を重ね合わせて同時に排出する用紙バンチ機構を備えた用紙排出機構及びその機構を搭載したプリンタが使用されている（例えば、特許文献１参照。）。これは排出する用紙を案内する案内手段を設け、排出ローラ側に確実に案内するようにしたものである。   2. Description of the Related Art Conventionally, a paper discharge mechanism including a paper bunch mechanism that simultaneously discharges a plurality of printed sheets by a printer and a printer equipped with the mechanism have been used (see, for example, Patent Document 1). This is provided with guide means for guiding the paper to be discharged so as to reliably guide it to the discharge roller side.

一方、複数枚の印刷された用紙は、必ずしも同サイズの用紙だけでなく、異なるサイズの用紙が同時に取り扱われることがある。
特開平９−１４２７０８号公報 On the other hand, a plurality of printed sheets are not necessarily the same size, and different sizes may be handled at the same time.
JP-A-9-142708

上記した特許文献１に開示された従来技術では、異なるサイズの用紙が同時に取り扱われる場合については、対応していなかった。   In the prior art disclosed in Patent Document 1 described above, the case where sheets of different sizes are handled simultaneously is not supported.

異なるサイズの用紙を同時に排出させる際、用紙の先端が不揃いになったり、用紙を重ねる間、印刷作業を停止させる必要があり、印刷処理のスループットが遅くなるという問題点があった。   When papers of different sizes are discharged at the same time, there are problems that the leading edges of the papers are uneven or that the printing operation needs to be stopped while the papers are stacked, resulting in a slow print processing throughput.

そこで、本発明は、上記問題点を解決するために、用紙の先端合わせの位置精度を向上させ、また印刷の際のスループットを向上させることができる用紙排出機構およびその機構を搭載したプリンタを提供することを目的とする。   In order to solve the above problems, the present invention provides a paper discharge mechanism that can improve the positional accuracy of the leading edge of the paper and can improve the throughput during printing, and a printer equipped with the mechanism. The purpose is to do.

本発明の一態様によれば、印刷済みの用紙を後端から受け入れて、途中、用紙を一時的に退避させる退避側ルートと用紙を先端から排出口に導く排出側ルートとに分岐して形成されている用紙搬送路と、この用紙搬送路の入口近傍に配設され、用紙を検出する用紙検出センサと、この用紙検出センサの用紙搬送方向下流に配設され、用紙を搬送させる第１駆動ローラと、この第１駆動ローラに用紙を押さえ付ける第１ピンチローラと、前記用紙搬送路を搬送方向下流から上流に逆搬送されてきた用紙を先端から一時的に収容する用紙収容部と、用紙の搬送ルートを、前記用紙収容部側か前記用紙搬送路の下流側かのいずれかに切り換える第１切り換え部材と、用紙の搬送ルートを、前記用紙搬送路の退避側ルートか前記用紙搬送路の排出側ルートかのいずれかに切り換える第２切り換え部材と、前記用紙搬送路の退避側ルートに配設されるとともに、前記第１駆動ローラとは別に駆動され、用紙を搬送させる第２駆動ローラと、この第２駆動ローラに用紙を押さえ付ける第２ピンチローラと、を備え、前記第１駆動ローラで搬送された用紙の先端が前記第１切り換え部材を通過後、前記第１切り換え部材の位置を切り換えて、前記第２駆動ローラで用紙を搬送方向上流に逆搬送させ、用紙を先端から前記用紙収容部に収容することを特徴とする用紙排出機構が提供される。   According to one aspect of the present invention, a printed sheet is received from the rear end, and is divided into a retreat-side route that temporarily retracts the sheet and a discharge-side route that leads the sheet from the front end to the discharge port. A paper transport path, a paper detection sensor that is disposed near the entrance of the paper transport path and detects the paper, and a first drive that is disposed downstream of the paper detection sensor in the paper transport direction and transports the paper. A roller, a first pinch roller that presses the paper against the first drive roller, a paper storage unit that temporarily stores the paper that has been reversely transported from the downstream to the upstream in the transport direction in the paper transport path, and a paper A first switching member that switches either the sheet storage unit side or the downstream side of the sheet transport path, and the sheet transport route between the retreat side route of the sheet transport path or the sheet transport path. Discharge side A second switching member for switching to any one of the first and second papers, a second driving roller which is disposed in the retreat side route of the paper conveyance path and is driven separately from the first driving roller to convey the paper, A second pinch roller that presses the paper against the second drive roller, and switches the position of the first switching member after the leading edge of the paper conveyed by the first drive roller passes through the first switching member. A paper discharge mechanism is provided in which the paper is reversely conveyed upstream in the conveyance direction by the second drive roller, and the paper is accommodated in the paper accommodating portion from the front end.

本発明の用紙排出機構においては、用紙を先端から前記用紙収容部に収容させた後、前記第２ピンチローラの前記第２駆動ローラへの圧接を解除し、用紙に対する駆動力を作用させないことを特徴とする。   In the paper discharge mechanism of the present invention, after the paper is stored in the paper storage portion from the front end, the pressure contact of the second pinch roller to the second driving roller is released, and the driving force for the paper is not applied. Features.

また、本発明の用紙排出機構においては、用紙を先端から前記用紙収容部に収容中、次に搬送される用紙は、前記第１駆動ローラによって搬送され、前記第１切り換え部材の手前で待機していることを特徴とする。   In the paper discharge mechanism of the present invention, while the paper is being stored in the paper storage portion from the leading edge, the next paper to be transported is transported by the first drive roller and waits before the first switching member. It is characterized by.

また、本発明の用紙排出機構においては、用紙を先端から前記用紙収容部に収容中、次に搬送される用紙は、前記第１駆動ローラによって搬送され、前記第１切り換え部材の手前で待機していることを特徴とする。   In the paper discharge mechanism of the present invention, while the paper is being stored in the paper storage portion from the leading edge, the next paper to be transported is transported by the first drive roller and waits before the first switching member. It is characterized by.

また、本発明の用紙排出機構においては、前記第１駆動ローラと前記第２駆動ローラ間の距離は、この用紙排出機構で取り扱う用紙の最小長さよりも短く配置されていることを特徴とする。   In the paper discharge mechanism of the present invention, the distance between the first drive roller and the second drive roller is arranged shorter than the minimum length of paper handled by the paper discharge mechanism.

また、本発明の用紙排出機構においては、前記用紙収容部の幅方向寸法は、この用紙排出機構で取り扱う最も大きな用紙の幅寸法よりも大きくなっていることを特徴とする。   In the sheet discharge mechanism of the present invention, the width direction dimension of the sheet storage portion is larger than the width dimension of the largest sheet handled by the sheet discharge mechanism.

また、本発明の用紙排出機構においては、前記第１切り換え部材は、前記用紙搬送路に略平行して配置され、搬送方向下流に向かって先端がくさび状に形成され、前記用紙搬送路の一部を兼ねるとともに、該先端が前記用紙搬送路の一方の内壁に接するように、回動可能に軸支されていることを特徴とする。   In the paper discharge mechanism of the present invention, the first switching member is disposed substantially parallel to the paper transport path, and has a wedge-shaped tip toward the downstream in the transport direction. It is also characterized in that it is pivotally supported so that it also serves as a part and its tip is in contact with one inner wall of the paper transport path.

また、本発明の用紙排出機構においては、前記第２切り換え部材は、前記用紙搬送路の分岐部の傍に略平行して配置され、搬送方向上流に向かって先端がくさび状に形成され、前記用紙搬送路の一部を兼ねるとともに、該先端が排出ルートとなっている前記用紙搬送路の内壁に接するように、回動可能に軸支されていることを特徴とする。   In the paper discharge mechanism of the present invention, the second switching member is disposed substantially parallel to the side of the branch portion of the paper transport path, and the tip is formed in a wedge shape toward the upstream in the transport direction. It also serves as a part of the sheet conveyance path, and is pivotally supported so as to be in contact with the inner wall of the sheet conveyance path serving as a discharge route.

また、本発明の用紙排出機構においては、前記用紙収容部は、その一端部において前記用紙搬送路と接合するとともに、該一端部の一部は、前記第１切り換え部材のくさび状部が係合するように、切り欠いて形成されていることを特徴とする。   In the paper discharge mechanism of the present invention, the paper storage portion is joined to the paper conveyance path at one end portion thereof, and a wedge-shaped portion of the first switching member is engaged with a part of the one end portion. Thus, it is characterized by being cut out.

また、本発明の用紙排出機構においては、前記用紙収容部に収容された用紙を押さえるための用紙押さえローラを備えたことを特徴とする。   In the paper discharge mechanism of the present invention, a paper pressing roller for pressing the paper stored in the paper storage portion is provided.

また、本発明の用紙排出機構においては、前記第２切り換え部材の用紙搬送方向下流側に、用紙を搬送させる第３駆動ローラおよびこの第３駆動ローラに用紙を押さえ付ける第３ピンチローラを備えたことを特徴とする。   In the paper discharge mechanism of the present invention, a third drive roller for transporting paper and a third pinch roller for pressing the paper against the third drive roller are provided downstream of the second switching member in the paper transport direction. It is characterized by that.

また、本発明の用紙排出機構においては、ｎ枚目の用紙の搬送は、（ｎ−１）枚目の用紙先端が用紙検出センサを通過後に、搬送方向下流に搬送された送り量と搬送方向上流に逆搬送された戻し量の差分だけ、搬送方向下流に搬送された後、第２駆動ローラによってｎ枚の用紙を挟持して同時に下流に搬送されることを特徴とする。   In the paper discharge mechanism of the present invention, the nth paper is transported by the feed amount and the transport direction transported downstream in the transport direction after the (n-1) th paper tip has passed the paper detection sensor. The sheet is conveyed downstream in the conveyance direction by the difference in the return amount conveyed backward upstream, and then n sheets are nipped by the second drive roller and simultaneously conveyed downstream.

また、本発明の用紙排出機構においては、前記用紙収容部は、１０枚までのサイズの異なる用紙を一時的に収容可能であることを特徴とする。   In the paper discharge mechanism of the present invention, the paper storage unit can temporarily store up to 10 sheets of different sizes.

また、本発明の用紙排出機構においては、前記第２駆動ローラの用紙搬送方向下流側に、用紙を検出する第２の用紙検出センサが配設されていることを特徴とする。   In the paper discharge mechanism of the present invention, a second paper detection sensor for detecting paper is disposed downstream of the second drive roller in the paper transport direction.

本発明の別の態様によれば、上記したいずれかの用紙排出機構を搭載したことを特徴とするプリンタが提供される。   According to another aspect of the present invention, there is provided a printer including any one of the paper discharge mechanisms described above.

本発明によれば、用紙の先端合わせのタイムラグを最小限にすることができ、さらに、用紙サイズの異なる複数の用紙であっても、先端合わせの位置精度を向上させることができる。   According to the present invention, it is possible to minimize the time lag of the leading edge alignment of paper, and it is possible to improve the positional accuracy of leading edge alignment even for a plurality of paper sheets having different paper sizes.

以下、本発明の実施形態について、図面を参照しながら説明する。尚、各図において同一箇所については同一の符号を付すとともに、重複した説明は省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same portions are denoted by the same reference numerals, and redundant description is omitted.

図１Ａ、図１Ｂは、本発明の実施形態に係る用紙排出機構を搭載したプリンタの外観を示す斜視図である。このプリンタは、例えばセルフサービス情報端末（ＫＩＯＳＫ）内に組み込むことができる。また、この用紙排出機構は、いわゆるバンチ（ＢＵＮＣＨ）機構と称されるもので、同種類の物、ここでは複数枚の用紙をまとめて処理（例えば、同時に排出処理）するための機構として説明する。   1A and 1B are perspective views showing an external appearance of a printer equipped with a paper discharge mechanism according to an embodiment of the present invention. This printer can be incorporated in a self-service information terminal (KIOSK), for example. Further, this paper discharge mechanism is called a so-called BUNCH mechanism, and will be described as a mechanism for processing (for example, simultaneous discharge processing) a plurality of sheets of the same type, here. .

図２は、本発明の実施形態に係るバンチ機構の構成を示す略断面図である。このバンチ機構は、例えば１０枚までの用紙をまとめて排出処理することができる。   FIG. 2 is a schematic cross-sectional view showing the configuration of the bunch mechanism according to the embodiment of the present invention. This bunch mechanism can discharge, for example, up to 10 sheets.

図２に示すように、印刷エンジンで印刷処理された用紙は、バンチ機構に受け入れられる。このバンチ機構２０は、大別すると、印刷済みの用紙を受け入れて排出口まで搬送させるための用紙搬送路１０、用紙を検出するための用紙検出センサ１、用紙搬送路において用紙を搬送させるための第１駆動ローラ２と第２駆動ローラ７、第１駆動ローラ２,第２駆動ローラ７に用紙を押さえ付けるための第１ピンチローラ３と第２ピンチローラ８、用紙の搬送ルートを切り換える第１切り換え部材（ＦＬＯＰＰＥＲ）４と第２切り換え部材９、用紙を先端から一時的に収容する用紙収容部５、用紙収容部５内の用紙を押さえるための用紙押さえローラ６を備えている。   As shown in FIG. 2, the sheet printed by the print engine is received by the bunch mechanism. The bunch mechanism 20 can be broadly divided into a paper transport path 10 for receiving printed paper and transporting it to a discharge port, a paper detection sensor 1 for detecting paper, and a paper transport path for transporting paper in the paper transport path. A first pinch roller 3 and a second pinch roller 8 for pressing the paper against the first drive roller 2 and the second drive roller 7, the first drive roller 2, and the second drive roller 7, and a first to switch the paper transport route A switching member (FLOPPER) 4 and a second switching member 9, a paper storage unit 5 for temporarily storing paper from the leading edge, and a paper pressing roller 6 for pressing the paper in the paper storage unit 5 are provided.

本実施形態において、用紙の先端とは、バンチ機構２０に始めに受け入れられる反対側をいい、最終的に排出される際に先に排出される側である。   In the present embodiment, the leading edge of the paper refers to the opposite side first received by the bunch mechanism 20, and is the side that is discharged first when it is finally discharged.

用紙検出センサ１は、バンチ機構２０に受け入れられる用紙の先端、後端および通過時間を検出するように、用紙搬送路１０の入口近傍に配設されている。用紙検出センサ１は、例えばフォトセンサが好適である。   The sheet detection sensor 1 is disposed in the vicinity of the entrance of the sheet conveyance path 10 so as to detect the leading edge, the trailing edge, and the passage time of the sheet received by the bunch mechanism 20. The paper detection sensor 1 is preferably a photo sensor, for example.

用紙を搬送させるための第１駆動ローラ２およびこの第１駆動ローラ２に用紙を押さえ付けるための第１ピンチローラ３は、用紙検出センサ１の用紙搬送方向下流に配設されている。第１ピンチローラ３は第１駆動ローラ２と対向しており、用紙を挟持する際だけ、第１駆動ローラ２に向けて移動（下降）するように構成されている。   A first drive roller 2 for transporting the paper and a first pinch roller 3 for pressing the paper against the first drive roller 2 are disposed downstream of the paper detection sensor 1 in the paper transport direction. The first pinch roller 3 is opposed to the first driving roller 2 and is configured to move (lower) toward the first driving roller 2 only when the sheet is sandwiched.

第１駆動ローラ２の用紙搬送方向下流には、用紙の搬送ルートを切り換える第１切り換え部材４が配設されている。第１切り換え部材４は、用紙搬送方向下流に向けて先端がくさび状に形成され、用紙搬送路１０の開口部１０ａの傍に略平行して配置されている。第１切り換え部材４は、用紙搬送路１０の一部を兼ねるとともに、先端が用紙搬送路１０の一方の内壁に接するように、回動可能に軸支されている。したがって、第１切り換え部材４の先端が用紙搬送路１０の内壁に接している状態では、用紙は第１切り換え部材４によって、その搬送を妨げられ、第１切り換え部材４が用紙搬送路の一部を兼ねている状態では、用紙は下流に搬送可能となる。   A first switching member 4 that switches the paper transport route is disposed downstream of the first drive roller 2 in the paper transport direction. The first switching member 4 has a wedge-shaped tip toward the downstream side in the paper conveyance direction, and is disposed substantially parallel to the opening 10 a of the paper conveyance path 10. The first switching member 4 also serves as a part of the paper transport path 10 and is pivotally supported so that the tip thereof is in contact with one inner wall of the paper transport path 10. Therefore, in a state where the tip of the first switching member 4 is in contact with the inner wall of the paper transport path 10, the paper is prevented from being transported by the first switching member 4, and the first switching member 4 is a part of the paper transport path. In this state, the sheet can be conveyed downstream.

第１切り換え部材４の先（用紙搬送方向下流）には、用紙収容部５が配置されている。用紙収容部５は、例えば１０枚までの用紙を、一時的に、先端から収容することができる。用紙収容部５の幅方向（用紙の幅方向と同方向）は、最も大きな用紙の幅寸法よりも若干大きくなっている。また、用紙収容部５は、用紙を用紙の長さ方向（搬送方向）において完全に収容する必要はない。用紙収容部５よりも用紙搬送方向下流に位置している用紙搬送路１０と一緒になって、用紙を保持できればよいからである。用紙収容部５の一端部は、用紙搬送路１０と接合するとともに、その一端部の一部は、第１切り換え部材４のくさび状部が係合するように、切り欠いて形成されている。すなわち、第１切り換え部材４が用紙搬送路１０の一部を兼ねている状態では、第１切り換え部材４が用紙収容部５の先端を塞ぎ、第１切り換え部材４の先端が用紙搬送路１０の内壁に接している状態では、用紙搬送路１０に在る用紙は第１切り換え部材４のくさび状部を滑るように先端から収容されていくようになっている。   A paper storage unit 5 is disposed at the tip of the first switching member 4 (downstream in the paper conveyance direction). The paper storage unit 5 can temporarily store, for example, up to 10 sheets from the front end. The width direction of the sheet storage unit 5 (the same direction as the sheet width direction) is slightly larger than the width dimension of the largest sheet. Further, the sheet storage unit 5 does not need to completely store the sheet in the length direction (conveyance direction) of the sheet. This is because it suffices if the sheet can be held together with the sheet conveyance path 10 positioned downstream of the sheet storage unit 5 in the sheet conveyance direction. One end of the sheet storage unit 5 is joined to the sheet conveyance path 10, and a part of the one end is notched so that the wedge-shaped portion of the first switching member 4 is engaged. In other words, in a state where the first switching member 4 also serves as a part of the paper transport path 10, the first switching member 4 closes the front end of the paper container 5, and the front end of the first switching member 4 is in the paper transport path 10. In a state where it is in contact with the inner wall, the paper in the paper transport path 10 is received from the tip so as to slide on the wedge-shaped portion of the first switching member 4.

用紙押さえローラ６は、用紙収容部５に収容された用紙が暴れないように押さえつけるために、用紙収容部５の横に配設されている。したがって、用紙収容部５から用紙が出入りする際には、用紙を用紙収容部５の内壁に圧接しないようになっている。   The sheet pressing roller 6 is disposed on the side of the sheet storage unit 5 so as to press the sheets stored in the sheet storage unit 5 so as not to be violated. Therefore, the sheet is not pressed against the inner wall of the sheet storage unit 5 when the sheet enters and exits from the sheet storage unit 5.

第１切り換え部材４のさらに下流では、用紙搬送路１０は、図２に示されるように、略Ｙ字状に分岐して形成されている。ここでの分岐は、用紙排出口に向かう排出ルート１０ｃと複数枚の用紙をバンチ、すなわち、まとめて処理するための退避ルート１０ｂから成っている。   Further downstream of the first switching member 4, the sheet conveyance path 10 is formed to branch in a substantially Y shape as shown in FIG. 2. The branching here includes a discharge route 10c toward the paper discharge port and a bunch, that is, a retreat route 10b for collectively processing a plurality of sheets.

退避ルートとなっている用紙搬送路１０ｂには、用紙を搬送させるための第２駆動ローラ７およびこの第２駆動ローラ７に用紙を押さえ付けるための第２ピンチローラ８が配設されている。第２駆動ローラ７の下流には、さらに用紙検出センサを配設することができる。第２駆動ローラ７は、第１駆動ローラ２とは別々に駆動されるようになっている。また、第１駆動ローラ２と第２駆動ローラ７間の距離は、このバンチ機構２０で取り扱う用紙の最小長さよりも短くなるように配置されている。   A second driving roller 7 for conveying the sheet and a second pinch roller 8 for pressing the sheet against the second driving roller 7 are disposed in the sheet conveying path 10b serving as a retreat route. A paper detection sensor can be further provided downstream of the second drive roller 7. The second drive roller 7 is driven separately from the first drive roller 2. Further, the distance between the first drive roller 2 and the second drive roller 7 is arranged to be shorter than the minimum length of the paper handled by the bunch mechanism 20.

排出ルートとなっている用紙搬送路１０ｃの分岐部１０ｄの近傍には、第２切り換え部材９が配設されている。第２切り換え部材９は、用紙搬送方向上流に向けて先端がくさび状に形成され、用紙搬送路１０ｃの分岐部１０ｄの傍に略平行して配置されている。第２切り換え部材９は、用紙搬送路１０ｃの一部を兼ねるとともに、先端が排出ルートとなっている用紙搬送路１０ｃの一方の内壁に接するように、回動可能に軸支されている。したがって、第２切り換え部材９の先端が用紙搬送路１０ｃの内壁に接している状態では、用紙は第２切り換え部材９によって、排出口方向への搬送を防いで第２駆動ローラ７方向への搬送を可能とし、第２切り換え部材９が用紙搬送路１０ｃの一部を兼ねている状態では、用紙は排出口方向に向かって搬送可能となる。   A second switching member 9 is disposed in the vicinity of the branching portion 10d of the paper conveyance path 10c serving as a discharge route. The second switching member 9 has a wedge-shaped tip toward the upstream side in the paper conveyance direction, and is disposed substantially parallel to the branch portion 10d of the paper conveyance path 10c. The second switching member 9 also serves as a part of the paper transport path 10c and is pivotally supported so as to be in contact with one inner wall of the paper transport path 10c whose tip is a discharge route. Therefore, in a state where the tip of the second switching member 9 is in contact with the inner wall of the sheet conveying path 10c, the sheet is conveyed by the second switching member 9 in the direction of the second drive roller 7 while being prevented from being conveyed in the direction of the discharge port. In a state where the second switching member 9 also serves as a part of the sheet conveyance path 10c, the sheet can be conveyed toward the discharge port.

尚、排出口に至るまでの距離が長い場合には、用紙排出を速やかに行うため、図２に示すように、第２切り換え部材９の下流に第３駆動ローラおよび第３ピンチローラを配設することが好適である。第３駆動ローラと第２駆動ローラ間の距離は、この用紙排出機構で取り扱う用紙の最小長さよりも短く設定する。   If the distance to the discharge port is long, the third drive roller and the third pinch roller are disposed downstream of the second switching member 9 as shown in FIG. It is preferable to do. The distance between the third drive roller and the second drive roller is set to be shorter than the minimum length of the paper handled by this paper discharge mechanism.

次に、このように構成されているバンチ機構２０による用紙搬送処理について説明する。   Next, a paper conveyance process by the bunch mechanism 20 configured as described above will be described.

＜１枚目の用紙＞
まず、１枚目の用紙がプリントエンジン３０から排紙され、用紙後端からバンチ機構２０に受け入れられると、用紙検出センサ１は、用紙の進入を検出する。すると第１駆動ローラ２が図３中反時計回りに回転し、第１ピンチローラ３が第１駆動ローラ２に圧接する。したがって、用紙は第１駆動ローラ２と第１ピンチローラ３とで挟持され、用紙搬送路１０を下流に搬送される。このとき、第１切り換え部材４の先端は、用紙収容部５側に位置している。また、第２切り換え部材９の先端は、用紙搬送路１０ｃの内壁に接している（図３参照）。 <First sheet>
First, when the first sheet is discharged from the print engine 30 and received by the bunch mechanism 20 from the rear end of the sheet, the sheet detection sensor 1 detects the entry of the sheet. Then, the first drive roller 2 rotates counterclockwise in FIG. 3, and the first pinch roller 3 presses against the first drive roller 2. Accordingly, the sheet is sandwiched between the first drive roller 2 and the first pinch roller 3 and conveyed downstream in the sheet conveyance path 10. At this time, the distal end of the first switching member 4 is located on the sheet storage unit 5 side. Further, the tip of the second switching member 9 is in contact with the inner wall of the paper transport path 10c (see FIG. 3).

次いで、例えば、用紙が第１駆動ローラ２と第１ピンチローラ３とで挟持されたことを契機として、第２駆動ローラ７を図４中、反時計回りに回転させ、第２ピンチローラ８を第２駆動ローラ７に圧接させる（図４参照）。   Next, for example, when the sheet is sandwiched between the first drive roller 2 and the first pinch roller 3, the second drive roller 7 is rotated counterclockwise in FIG. The second drive roller 7 is brought into pressure contact (see FIG. 4).

用紙は、用紙搬送路１０を下流に搬送され、用紙検出センサ１は搬送されている用紙の長さを検出する。検出された用紙の長さを基準に、用紙検出センサ１は用紙先端の第１切り換え部材４の通過を検出する（図５参照）。   The paper is transported downstream through the paper transport path 10, and the paper detection sensor 1 detects the length of the paper being transported. Based on the detected length of the paper, the paper detection sensor 1 detects the passage of the first switching member 4 at the front end of the paper (see FIG. 5).

用紙先端の第１切り換え部材４の通過を検出したら、第２駆動ローラ７を図６中、時計回りに逆回転させ、用紙を上流に逆搬送させる。このとき、第１切り換え部材４は回動され、第１切り換え部材４の先端が用紙搬送路１０の内壁に接している（図６参照）。   When the passage of the first switching member 4 at the leading edge of the sheet is detected, the second driving roller 7 is rotated in the clockwise direction in FIG. 6 to reversely convey the sheet upstream. At this time, the first switching member 4 is rotated, and the front end of the first switching member 4 is in contact with the inner wall of the paper transport path 10 (see FIG. 6).

すると、逆搬送されている用紙は、先端から用紙収容部５に収容されていく。   Then, the reversely conveyed paper is stored in the paper storage unit 5 from the front end.

尚、収容の際は、用紙押さえローラ６を待避しておき、用紙先端が用紙収容部５に収容された後、図６に示すように例えばばね圧を付与して、用紙を押さえる。さらに用紙先端が収容された後、第２ピンチローラ８の第２駆動ローラ７への圧接を解除し、用紙に対する駆動力をなくす。   When storing, the sheet pressing roller 6 is retracted, and after the leading end of the sheet is stored in the sheet storing portion 5, for example, spring pressure is applied to press the sheet as shown in FIG. Further, after the leading edge of the sheet is received, the pressure contact of the second pinch roller 8 to the second driving roller 7 is released, and the driving force for the sheet is eliminated.

その際、次の用紙である２枚目の用紙は、第１駆動ローラ２によって既に搬送されており、第１切り換え部材４の手前で待機している（図６参照）。   At that time, the second sheet, which is the next sheet, has already been conveyed by the first drive roller 2 and is waiting in front of the first switching member 4 (see FIG. 6).

＜２枚目の用紙＞
２枚目の用紙は、まず、１枚目の用紙先端が用紙検出センサ１を通過後に、搬送方向下流に搬送された送り量と搬送方向上流に逆搬送された戻し量の差分だけ、搬送方向下流に搬送される。その後、第２ピンチローラ８を下降させて第２駆動ローラ７へ圧接させ、２枚の用紙を挟持して同時に下流に搬送させる（図７参照）。 <Second sheet>
For the second sheet, first, after the leading edge of the first sheet has passed the sheet detection sensor 1, the difference between the feed amount conveyed downstream in the conveyance direction and the return amount reversely conveyed upstream in the conveyance direction is equal to the conveyance direction. It is conveyed downstream. Thereafter, the second pinch roller 8 is lowered and pressed against the second driving roller 7 to sandwich the two sheets and simultaneously convey them downstream (see FIG. 7).

そして、２枚目の用紙先端が第１切り換え部材４を通過後、第２駆動ローラ７を図８中、時計回りに逆回転させ、２枚の用紙を上流に逆搬送させる。このとき、第１切り換え部材４は回動され、第１切り換え部材４の先端が用紙搬送路１０の内壁に接している。すると、逆搬送されている２枚の用紙は、先端から用紙収容部５に収容されていく（図９参照）。   Then, after the leading edge of the second sheet passes through the first switching member 4, the second drive roller 7 is rotated in the reverse direction clockwise in FIG. 8 to reversely convey the two sheets upstream. At this time, the first switching member 4 is rotated, and the tip of the first switching member 4 is in contact with the inner wall of the paper transport path 10. Then, the two sheets being reversely conveyed are accommodated in the sheet accommodating portion 5 from the leading edge (see FIG. 9).

尚、収容の際は、用紙押さえローラ６を待避しておき、用紙先端が用紙収容部５に収容された後、例えばばね圧を付与して、用紙を押さえる。さらに用紙先端が収容された後、第２ピンチローラ８の第２駆動ローラ７への圧接を解除し、用紙に対する駆動力をなくす。   In storing, the sheet pressing roller 6 is retracted, and after the leading end of the sheet is stored in the sheet storing unit 5, for example, spring pressure is applied to press the sheet. Further, after the leading edge of the sheet is received, the pressure contact of the second pinch roller 8 to the second driving roller 7 is released, and the driving force for the sheet is eliminated.

＜３枚目以降の用紙＞
上述したように、本実施形態における用紙収容部５には、最大１０枚まで溜め込むことができる。したがって、３枚目以降の用紙についても、２枚目用紙の場合と同様な動作を繰り返すことにより、用紙サイズが異なる場合であっても、先端を揃えて収容できる。 <The third and subsequent sheets>
As described above, a maximum of 10 sheets can be stored in the sheet storage unit 5 in the present embodiment. Therefore, by repeating the same operation as that for the second sheet, the third and subsequent sheets can be accommodated with the leading ends aligned even when the sheet sizes are different.

＜排出処理＞
全ての用紙の先端が揃った後、第２ピンチローラ８を第２駆動ローラ７に圧接させ、第２駆動ローラ７を図１０中、反時計方向に回転させ、用紙束を用紙搬送路の退避側ルート下流に搬送する。この際、第２切り換え部材９の先端は用紙搬送路１０ｃの内壁に接している（図１０参照）。 <Discharge processing>
After the leading edges of all the sheets are aligned, the second pinch roller 8 is brought into pressure contact with the second drive roller 7, the second drive roller 7 is rotated counterclockwise in FIG. 10, and the sheet bundle is retracted from the sheet conveyance path. Transport downstream side route. At this time, the tip of the second switching member 9 is in contact with the inner wall of the paper transport path 10c (see FIG. 10).

第２駆動ローラ７により、用紙束の先端が第２切り換え部材９を通過するまで搬送されると、第２切り換え部材９を回動させ、用紙搬送路１０ｃの一部を兼ねる状態とする。   When the second driving roller 7 conveys the leading end of the sheet bundle until it passes through the second switching member 9, the second switching member 9 is rotated so that it also serves as a part of the sheet conveying path 10c.

その後、第２駆動ローラ７を図１１中時計方向に回転させ、用紙束を逆搬送させ、排出ルートとなっている用紙搬送路１０ｃへと導き、用紙束を排出口から排出する（図１１参照）。   Thereafter, the second drive roller 7 is rotated clockwise in FIG. 11 to reversely convey the sheet bundle, and is guided to the sheet conveyance path 10c serving as a discharge route, and the sheet bundle is discharged from the discharge port (see FIG. 11). ).

本実施形態によれば、用紙の先端合わせのタイムラグを最小限にすることが可能となる。さらに、用紙は常に第１の駆動ローラか第２の駆動ローラのどちらかに挟持された状態で搬送される。このため、用紙サイズの異なる複数の用紙であっても、先端合わせの位置精度を向上させることができる。   According to the present embodiment, it is possible to minimize the time lag of the leading edge alignment of the paper. Further, the sheet is always conveyed while being sandwiched between either the first driving roller or the second driving roller. For this reason, it is possible to improve the position accuracy of the leading end alignment even for a plurality of sheets having different sheet sizes.

本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。   The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

本発明の実施形態に係る用紙排出機構を搭載したプリンタの外観を示す斜視図である。1 is a perspective view illustrating an appearance of a printer equipped with a paper discharge mechanism according to an embodiment of the present invention. 本発明の実施形態に係る用紙排出機構を搭載したプリンタの外観を示す斜視図である。1 is a perspective view illustrating an appearance of a printer equipped with a paper discharge mechanism according to an embodiment of the present invention. 本発明の実施形態に係る用紙排出機構の構成を示す略断面図である。1 is a schematic cross-sectional view illustrating a configuration of a paper discharge mechanism according to an embodiment of the present invention. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism. 用紙排出機構による用紙搬送および排出処理を説明する図である。FIG. 6 is a diagram for describing paper conveyance and discharge processing by a paper discharge mechanism.

符号の説明Explanation of symbols

１・・・用紙検出センサ、２・・・第１駆動ローラ、３・・・第１ピンチローラ、４・・・第１切り換え部材、５・・・用紙収容部、６・・・用紙押さえローラ、７・・・第２駆動ローラ、８・・・第２ピンチローラ、９・・・第２切り換え部材、１０・・・用紙搬送路、１０ａ・・・開口部、１０ｂ・・・退避ルートの用紙搬送路、１０ｃ・・・排出ルートの用紙搬送路、１０ｄ・・・分岐部、２０・・・バンチ機構、３０・・・プリントエンジン、１００・・・プリンタ。     DESCRIPTION OF SYMBOLS 1 ... Paper detection sensor, 2 ... 1st drive roller, 3 ... 1st pinch roller, 4 ... 1st switching member, 5 ... Paper storage part, 6 ... Paper press roller 7, second driving roller, 8 ... second pinch roller, 9 ... second switching member, 10 ... paper transport path, 10a ... opening, 10b ... retraction route Paper transport path, 10c... Paper transport path for discharge route, 10d... Branch, 20... Bunch mechanism, 30.

Claims (15)

印刷済みの用紙を後端から受け入れて、途中、用紙を一時的に退避させる退避側ルートと用紙を先端から排出口に導く排出側ルートとに分岐して形成されている用紙搬送路と、
この用紙搬送路の入口近傍に配設され、用紙を検出する用紙検出センサと、
この用紙検出センサの用紙搬送方向下流に配設され、用紙を搬送させる第１駆動ローラと、
この第１駆動ローラに用紙を押さえ付ける第１ピンチローラと、
前記用紙搬送路を搬送方向下流から上流に逆搬送されてきた用紙を先端から一時的に収容する用紙収容部と、
用紙の搬送ルートを、前記用紙収容部側か前記用紙搬送路の下流側かのいずれかに切り換える第１切り換え部材と、
用紙の搬送ルートを、前記用紙搬送路の退避側ルートか前記用紙搬送路の排出側ルートかのいずれかに切り換える第２切り換え部材と、
前記用紙搬送路の退避側ルートに配設されるとともに、前記第１駆動ローラとは別に駆動され、用紙を搬送させる第２駆動ローラと、
この第２駆動ローラに用紙を押さえ付ける第２ピンチローラと、を備え、
前記第１駆動ローラで搬送された用紙の先端が前記第１切り換え部材を通過後、前記第１切り換え部材の位置を切り換えて、前記第２駆動ローラで用紙を搬送方向上流に逆搬送させ、用紙を先端から前記用紙収容部に収容することを特徴とする用紙排出機構。 A paper conveyance path formed by branching into a retreat-side route that accepts printed paper from the rear end and temporarily retracts the paper on the way and a discharge-side route that leads the paper from the front to the discharge port;
A paper detection sensor disposed near the entrance of the paper transport path to detect paper;
A first drive roller disposed downstream of the sheet detection sensor in the sheet conveyance direction and configured to convey the sheet;
A first pinch roller that presses the paper against the first drive roller;
A paper storage unit that temporarily stores the paper that has been reversely transported from the downstream to the upstream in the transport direction in the paper transport path;
A first switching member that switches a paper conveyance route to either the paper container side or the downstream side of the paper conveyance path;
A second switching member that switches a paper transport route to either the retreat side route of the paper transport path or the discharge side route of the paper transport path;
A second driving roller that is disposed on a retreat side route of the sheet conveying path and is driven separately from the first driving roller to convey the sheet;
A second pinch roller that presses the paper against the second drive roller,
After the leading edge of the paper transported by the first driving roller passes through the first switching member, the position of the first switching member is switched, and the paper is reversely transported upstream in the transporting direction by the second driving roller. Is stored in the sheet storage portion from the front end. 用紙を先端から前記用紙収容部に収容させた後、前記第２ピンチローラの前記第２駆動ローラへの圧接を解除して、用紙に対する駆動力を作用させないことを特徴とする請求項１記載の用紙排出機構。   2. The driving force applied to the paper is not applied by releasing the pressure contact of the second pinch roller with the second driving roller after the paper is stored in the paper storage portion from the leading end. Paper discharge mechanism. 用紙を先端から前記用紙収容部に収容中、次に搬送される用紙を前記第１駆動ローラによって搬送し、前記第１切り換え部材の手前で待機させることを特徴とする請求項１または２記載の用紙排出機構。   3. The sheet according to claim 1, wherein a sheet to be conveyed next is conveyed by the first driving roller and is placed on standby before the first switching member while the sheet is being accommodated in the sheet accommodating unit from the front end. Paper discharge mechanism. 前記第１駆動ローラと前記第２駆動ローラ間の距離は、この用紙排出機構で取り扱う用紙の最小長さよりも短く配置されていることを特徴とする請求項１乃至３のいずれか１項に記載の用紙排出機構。   The distance between the first drive roller and the second drive roller is arranged to be shorter than the minimum length of the paper handled by the paper discharge mechanism. Paper discharge mechanism. 前記用紙収容部の幅方向寸法は、この用紙排出機構で取り扱う最も大きな用紙の幅寸法よりも大きくなっていることを特徴とする請求項１乃至４のいずれか１項に用紙排出機構。   5. The paper discharge mechanism according to claim 1, wherein a width direction dimension of the paper storage portion is larger than a width dimension of a largest paper handled by the paper discharge mechanism. 前記第１切り換え部材は、前記用紙搬送路に略平行して配置され、搬送方向下流に向けて先端がくさび状に形成され、前記用紙搬送路の一部を兼ねるとともに、該先端が前記用紙搬送路の一方の内壁に接するように、回動可能に軸支されていることを特徴とする請求項１乃至５のいずれか１項記載の用紙排出機構。   The first switching member is disposed substantially parallel to the paper transport path, and has a wedge-shaped tip toward the downstream in the transport direction, which also serves as a part of the paper transport path, and the front end is the paper transport path 6. The paper discharge mechanism according to claim 1, wherein the paper discharge mechanism is pivotally supported so as to be in contact with one inner wall of the path. 前記第２切り換え部材は、前記用紙搬送路の分岐部の傍に略平行して配置され、搬送方向上流に向けて先端がくさび状に形成され、前記用紙搬送路の一部を兼ねるとともに、該先端が排出ルートとなっている前記用紙搬送路の内壁に接するように、回動可能に軸支されていることを特徴とする請求項１乃至６のいずれか１項記載の用紙排出機構。   The second switching member is disposed substantially parallel to the branch portion of the paper transport path, and has a wedge-shaped tip toward the upstream in the transport direction, serving as a part of the paper transport path, The paper discharge mechanism according to claim 1, wherein the paper discharge mechanism is pivotally supported so as to be in contact with an inner wall of the paper conveyance path having a leading end as a discharge route. 前記用紙収容部は、一端部において前記用紙搬送路と接合するとともに、該一端部の一部は、前記第１切り換え部材のくさび状部が係合するように、切り欠いて形成されていることを特徴とする請求項１乃至７のいずれか１項に記載の用紙排出機構。   The paper storage portion is joined to the paper conveyance path at one end portion, and a part of the one end portion is cut out so that the wedge-shaped portion of the first switching member is engaged. The paper discharge mechanism according to any one of claims 1 to 7. 前記用紙収容部に収容された用紙を押さえるための用紙押さえローラを備えたことを特徴とする請求項１乃至８のいずれか１項に記載の用紙排出機構。   The paper discharge mechanism according to claim 1, further comprising a paper pressing roller for pressing the paper stored in the paper storage unit. 前記第２切り換え部材の用紙搬送方向下流側に、用紙を搬送させる第３駆動ローラおよびこの第３駆動ローラに用紙を押さえ付ける第３ピンチローラを備えたことを特徴とする請求項１乃至９のいずれか１項に記載の用紙排出機構。   The third drive roller for transporting a sheet and a third pinch roller for pressing the sheet against the third drive roller are provided downstream of the second switching member in the sheet transport direction. The paper discharge mechanism according to any one of the above. 前記第３駆動ローラと前記第２駆動ローラ間の距離は、この用紙排出機構で取り扱う用紙の最小長さよりも短く配置されていることを特徴とする請求項１０記載の用紙排出機構。   11. The paper discharge mechanism according to claim 10, wherein a distance between the third drive roller and the second drive roller is shorter than a minimum length of paper handled by the paper discharge mechanism. ｎ枚目の用紙の搬送は、（ｎ−１）枚目の用紙先端が前記用紙検出センサを通過後に、搬送方向下流に搬送された送り量と搬送方向上流に逆搬送された戻し量の差分だけ、搬送方向下流に搬送された後、前記第２駆動ローラによってｎ枚の用紙を挟持して同時に下流に搬送されることを特徴とする請求項１乃至１１のいずれか１項に記載の用紙排出機構。   The conveyance of the nth sheet is the difference between the feed amount conveyed downstream in the conveyance direction and the return amount reversely conveyed upstream in the conveyance direction after the leading edge of the (n-1) th sheet has passed the sheet detection sensor. 12. The sheet according to claim 1, wherein the sheet is conveyed downstream in the conveyance direction, and n sheets are nipped by the second driving roller and simultaneously conveyed downstream. Discharge mechanism. 前記用紙収容部は、１０枚までのサイズの異なる用紙を一時的に収容可能であることを特徴とする請求項１乃至１２のいずれか１項に記載の用紙排出機構。   The paper discharge mechanism according to any one of claims 1 to 12, wherein the paper storage unit is capable of temporarily storing up to 10 sheets of different sizes. 前記第２駆動ローラの用紙搬送方向下流側に、用紙を検出する第２の用紙検出センサが配設されていることを特徴とする請求項１乃至１３のいずれか１項に記載の用紙排出機構。   14. The paper discharge mechanism according to claim 1, wherein a second paper detection sensor for detecting paper is disposed downstream of the second drive roller in the paper conveyance direction. . 請求項１乃至１４のいずれかに記載の用紙排出機構を搭載したことを特徴とするプリンタ。   A printer comprising the paper discharge mechanism according to claim 1.
JP2008064369A 2008-03-13 2008-03-13 Paper discharge mechanism and printer mounted with this paper discharge mechanism Pending JP2009220909A (en)

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JP2012101941A (en) * 2010-10-13 2012-05-31 Canon Inc Sheet conveying system, image forming system, and image reader

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JP2000327208A (en) * 1999-05-21 2000-11-28 Ricoh Co Ltd Sheet treatment device
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JP2007039143A (en) * 2005-07-29 2007-02-15 Ricoh Co Ltd Sheet processing device and image forming device

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JP2000327208A (en) * 1999-05-21 2000-11-28 Ricoh Co Ltd Sheet treatment device
JP2006321643A (en) * 2005-05-20 2006-11-30 Ricoh Co Ltd Paper carrying device, paper processing system, image forming device and paper carrying method
JP2007039143A (en) * 2005-07-29 2007-02-15 Ricoh Co Ltd Sheet processing device and image forming device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012101941A (en) * 2010-10-13 2012-05-31 Canon Inc Sheet conveying system, image forming system, and image reader

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