JP2010202372A - Paper feeder and image forming device - Google Patents

Paper feeder and image forming device Download PDF

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JP2010202372A
JP2010202372A JP2009051282A JP2009051282A JP2010202372A JP 2010202372 A JP2010202372 A JP 2010202372A JP 2009051282 A JP2009051282 A JP 2009051282A JP 2009051282 A JP2009051282 A JP 2009051282A JP 2010202372 A JP2010202372 A JP 2010202372A
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paper
feeding device
air
side fence
sheet
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Munehisa Fuda
宗久 布田
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Ricoh Co Ltd
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Ricoh Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper feeder stably feeding paper even when a small amount of paper is stacked by enabling adjustment of a quantity of air blown to the side surface of a paper bundle from a blowout port arranged in a side fence in a paper storing section, eliminating apprehension of noises, and enhancing the quality of conveyance as equipment. <P>SOLUTION: A back plate 32 is arranged in an auxiliary stacking member 31 working with the movement of a tray bottom plate 6 and the side fence 13, and thus, an inlet port opened toward the outside of a blower fan 20 is blocked off by the back plate 32 with a reduction in an residual amount of paper S (a paper bundle). Consequently, the quantity of air blown from the blower fan 20 is decreased, and the excessive floating of the paper S and noises due to backlash on the tray bottom plate 6 can be prevented. The inlet port of the blower fan 20 is directed to the outside. Moreover, the tray bottom plate 6 is raised as the stacked paper S is reduced, and together with the rise, the auxiliary stacking member 31 and the back plate 32 are also raised. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、電子写真式の複写機、プリンタ、ファクシミリや、インクジェットプリンタ等々の各画像形成装置に装備される給紙装置及びこれを備えた画像形成装置に関する。   The present invention relates to a sheet feeding device provided in each image forming apparatus such as an electrophotographic copying machine, a printer, a facsimile, an ink jet printer, and the like, and an image forming apparatus including the sheet feeding device.

各種画像形成装置には、用紙収納部に収納された用紙束から一枚ずつ用紙を取り出して画像形成部、印字部に給紙する給紙装置が装備されている。   Various image forming apparatuses are equipped with a sheet feeding device that takes out sheets one by one from a bundle of sheets stored in a sheet storing section and feeds the sheets to the image forming section and the printing section.

近年、用紙の多様化に伴い、普通紙以外の用紙、例えば、コート紙、アート紙、フィルム紙等が使用されるようになっているが、普通紙以外の各種用紙は、用紙表面の平滑度がよく、通気性が少なく、吸湿性があるという特性を有するため、紙間密着力が高まる傾向がある。このため、従来の給紙装置では、普通紙に比べて分離性が悪く、重送や不送りが発生しやすいという問題を有している。   In recent years, with the diversification of paper, paper other than plain paper, such as coated paper, art paper, film paper, etc., has been used. However, since it has the characteristics of low air permeability and hygroscopicity, it tends to increase the adhesion between papers. For this reason, the conventional paper feeder has the problem that the separation performance is poor compared to plain paper, and double feed and non-feed are likely to occur.

この点を解決するために、用紙の側端部又は後端部を規制するガイド部の上部にノズルを設け、ガイド部内部に設けたブロワ等の送風手段から送られてきたエアを積載された用紙の上部端面へ吹き付ける手段を備えた給紙装置が提案されている。これによって積載された用紙の紙間にエアを送り込むことができるので、重送を防止することができる、というものである。   In order to solve this point, a nozzle is provided on the upper part of the guide part that regulates the side edge or the rear edge of the paper, and air sent from a blower or the like provided in the guide part is loaded. A paper feeding device having means for spraying on the upper end surface of paper has been proposed. As a result, air can be sent between the stacked sheets of paper, so that double feeding can be prevented.

しかしながら、用紙満載時と同じ風量にて用紙の積載量が少量のときでもエアの吹き付けを行うことになる構成であるので、用紙が束状で浮き上がり、意図した用紙の捌きが行えないことがある。また用紙少量積載時に、用紙とトレイ底板との間でエアによる用紙バタつきが発生し、騒音などが生じることがある。   However, since the structure is such that air is blown even when the amount of loaded paper is small with the same air volume as when the paper is fully loaded, the paper may float in a bundle and the intended paper may not be spun. . Further, when a small amount of paper is loaded, paper fluttering due to air may occur between the paper and the tray bottom plate, and noise may be generated.

この点を解決するための技術として、用紙残量に応じて制御的にブロワからのエアの風量を変更させる給紙機構が提案されている(例えば、特許文献1参照)。   As a technique for solving this problem, a paper feed mechanism has been proposed in which the air volume from the blower is changed in a controlled manner in accordance with the remaining amount of paper (see, for example, Patent Document 1).

しかしながら前記特許文献1で提案されている給紙機構においては、制御的にエアの風量をさせるため、ソフトウェアに変更を行わなければならない上、運用においては制御システムに負荷を与えることとなってしまうという問題がある。   However, in the paper feed mechanism proposed in Patent Document 1, the air volume is controlled in a controlled manner, so the software must be changed, and a load is imposed on the control system in operation. There is a problem.

本発明は前記従来の問題点にかんがみてなしたものであり、ソフト等に変更を加えなくとも、用紙が少量積載時においても安定的に給紙を行え、かつ騒音等の懸念がない給紙装置と、これを用いた画像形成装置の提供を目的としている。   The present invention has been made in view of the above-described conventional problems, and can feed paper stably even when a small amount of paper is loaded without changing software, etc., and is free from noise and other concerns. An object of the present invention is to provide an apparatus and an image forming apparatus using the apparatus.

本発明の給紙装置のうち請求項1に係るものは、用紙を複数枚束状に積載できる給紙台と、前記給紙台上に積載された用紙あるいは用紙の束を押し上げる給紙台上昇機構とピックアップコロを備え、最上位の用紙を分離して給紙する分離機構備え、さらに用紙の側縁部及び/または後縁部を規制するサイドフェンスを備え、該サイドフェンスの上部にブロワ等のエア吸入用の手段と、吸入したエアの吹き出し用のノズルを設け、前記エア吸入用手段から送られてきたエアを前記ノズルにより前記給紙台上に積載された用紙の束の上部端面へ吹き付け、最上位の用紙の分離を補助して給紙する給紙装置において、前記トレイ底板の動きに連動し、前記サイドフェンスに沿って上下可能で、前記ノズルからのエアの吹き出し量を可変させ得る調節部材を設けなることを特徴とする。   The paper feeding device according to claim 1 of the present invention includes a paper feeding base capable of stacking a plurality of sheets in a bundle, and a paper feeding base ascending to push up a paper or a stack of papers stacked on the paper feeding base. A mechanism and a pick-up roller, a separation mechanism that separates and feeds the uppermost sheet, a side fence that regulates the side edge and / or the rear edge of the sheet, and a blower on the upper side of the side fence Air suction means and a nozzle for blowing out the sucked air are provided, and the air sent from the air suction means is sent to the upper end surface of the bundle of sheets stacked on the paper feed table by the nozzle. In the paper feeding device that feeds paper by assisting in the separation of the topmost paper, it can be moved up and down along the side fence in conjunction with the movement of the tray bottom plate, and the amount of air blown from the nozzle can be varied. Acquiring adjustment Characterized by comprising providing a timber.

請求項2に係るものは、請求項1の給紙装置において、前記調節部材が、前記トレイ底板ともに上下動する補助積載部材に設けてあることを特徴とする。   According to a second aspect of the present invention, in the paper feeding device of the first aspect, the adjustment member is provided on an auxiliary stacking member that moves up and down together with the tray bottom plate.

請求項3に係るものは、請求項2の給紙装置において、前記調節部材が、前記補助積載部材に取り付けられ、前記サイドフェンスの上下動により前記エア吸入用手段のエア吸入可能面積を可変させる板材であることを特徴とする。   According to a third aspect of the present invention, in the sheet feeding device according to the second aspect, the adjustment member is attached to the auxiliary stacking member, and the air suckable area of the air suction means is varied by the vertical movement of the side fence. It is a board | plate material, It is characterized by the above-mentioned.

請求項4に係るものは、請求項3の給紙装置において、上記調節部材である板材を前記サイドフェンスから取り外し可能としたことを特徴とする。   According to a fourth aspect of the present invention, in the paper feeding device according to the third aspect, the plate member as the adjusting member can be detached from the side fence.

請求項5に係るものは、請求項4の給紙装置において、前記エア吸入手段の吸気口が前記サイドフェンスの外側に向けて設けてあり、前記板材が前記サイドフェンスの外側面に沿って移動することを特徴とする。   According to a fifth aspect of the present invention, in the paper feeding device according to the fourth aspect, the air inlet of the air suction means is provided toward the outside of the side fence, and the plate member moves along the outer surface of the side fence. It is characterized by doing.

請求項6に係る画像形成装置は、請求項1から5のいずれかに記載の給紙装置を備えたことを特徴とする。   An image forming apparatus according to a sixth aspect includes the paper feeding device according to any one of the first to fifth aspects.

本発明によれば、給紙装置の改良のために、用紙収納部内のサイドフェンスに配置した噴出口からのエアを用紙束側面に吹き付ける量を調節可能として、給紙前に用紙捌きを容易に行えるようにし、用紙を少量積載した時においても安定的に給紙を行え、かつ騒音等の懸念がなくなり、機器としての搬送品質を高め得る。   According to the present invention, in order to improve the paper feeding device, it is possible to adjust the amount of air blown from the ejection port arranged on the side fence in the paper storage unit to the side surface of the paper bundle, so that paper can be easily rolled before paper feeding. Thus, even when a small amount of paper is stacked, the paper can be stably fed, and there is no concern about noise or the like, so that the transport quality as a device can be improved.

本発明の給紙装置を備えた画像形成装置の構成説明図Configuration explanatory diagram of an image forming apparatus provided with a sheet feeding device of the present invention 給紙装置の内部構成を示す斜視図A perspective view showing the internal configuration of the paper feeder 図2中の矢印III方向から見て本発明に係る給紙装置の主要な特徴部分を示す斜視図FIG. 2 is a perspective view showing main features of the sheet feeding device according to the present invention as seen from the direction of arrow III in FIG. サイドフェンス面におけるエア噴出口の特徴的な形状を示す図The figure which shows the characteristic shape of the air spout on the side fence surface 本発明実施例の給紙トレイを斜め後ろから見た斜視図The perspective view which looked at the paper feed tray of the embodiment of the present invention from diagonally behind 同じく給紙トレイを後方から見た図The same view of the paper tray from the rear 用紙の積載量が残り数十枚程度になった状態を示す図A diagram showing a state where the remaining amount of paper is about several tens of sheets. 用紙の積載量が残り数十枚程度になった状態を示す図A diagram showing a state where the remaining amount of paper is about several tens of sheets. ペーパーエンド付近での給紙トレイの状態を示す図Diagram showing the state of the paper feed tray near the paper end ペーパーエンド付近での給紙トレイの状態を示す図Diagram showing the state of the paper feed tray near the paper end 背面板を補助積載部材に取り外し可能に取り付け、固定する構成を示す図The figure which shows the structure which attaches and fixes a back board to an auxiliary loading member so that removal is possible. 背面板を穴あき形状にした構成を示す図The figure which shows the structure which made the back plate perforated shape

本発明は、トレイ底板とサイドフェンスの動きに連動する補助積載部材に背面板を設けて、用紙残量が少なくなるに連れて背面板がブロワーファンの吸気口をふさいで行くようにして、ブロワーファンから吹き付けるエアの量を減少させ、用紙の浮き過ぎ、底板とのバタツキによる騒音を防止する。   The present invention provides a back plate on an auxiliary stacking member that interlocks with the movement of the tray bottom plate and the side fence so that the back plate blocks the blower fan inlet as the remaining amount of paper decreases. The amount of air blown from the fan is reduced to prevent noise caused by paper floating and fluttering with the bottom plate.

以下本発明を図に示す実施例を参照して説明する。なお本発明は図示の画像形成装置への実施には限定されず、画像形成を行う種々の装置に適用可能である。   The present invention will be described below with reference to the embodiments shown in the drawings. The present invention is not limited to the illustrated image forming apparatus, and can be applied to various apparatuses that perform image formation.

図1は本発明の給紙装置を備えた画像形成装置の構成説明図であり、図2は給紙装置の内部構成を示す斜視図である。画像形成装置1は、画像形成装置本体2と、画像形成装置本体2の一側面に接続された給紙装置5とから構成されている。   FIG. 1 is an explanatory diagram of a configuration of an image forming apparatus including a paper feeding device according to the present invention, and FIG. 2 is a perspective view showing an internal configuration of the paper feeding device. The image forming apparatus 1 includes an image forming apparatus main body 2 and a paper feeding device 5 connected to one side surface of the image forming apparatus main body 2.

図2に示すように、給紙装置5は、用紙束を積載するトレイ底板6を有する給紙トレイ(用紙収納部)8と、用紙束の最上部の用紙を一枚ずつ取り出して画像形成装置本体2側へ給紙する給紙ユニット(給紙手段)9とを備えている。給紙ユニット9には、給紙コロ11と、分離コロ12aと、戻しコロ12bとが配置されている。これらのコロ11、12a、12bは、予め設定されたそれぞれの給紙タイミングによって回転駆動される。   As shown in FIG. 2, the paper feeding device 5 takes out a paper feeding tray (paper storage unit) 8 having a tray bottom plate 6 on which the paper bundle is stacked, and the uppermost paper of the paper bundle one by one to form an image forming apparatus. A paper feeding unit (paper feeding means) 9 for feeding paper to the main body 2 side is provided. In the paper supply unit 9, a paper supply roller 11, a separation roller 12a, and a return roller 12b are arranged. These rollers 11, 12a, 12b are driven to rotate at respective preset paper feed timings.

また、給紙トレイ8内にはトレイ底板6上に積載された用紙束の幅方向(給紙方向と直交する方向)側面をガイドするサイドフェンス13を両側に設け、用紙束の後方には後端面を押えるエンドフェンス14がある。   In addition, side fences 13 are provided in both sides of the sheet feed tray 8 to guide the side surfaces in the width direction (direction perpendicular to the sheet feed direction) of the sheet bundle stacked on the tray bottom plate 6. There is an end fence 14 that holds the end face.

給紙トレイ8内における用紙束の上限検知はフォトインタラプタからなるセンサ15により行い、センサ15によって用紙の給紙位置を検知し、用紙の残量が少なくなっても常に用紙の給紙位置がばらつかないように、トレイ底板6を上昇モータMで上下動させることにより用紙の給紙位置の制御を行っている。すなわち、用紙積載量が増減しても常に給紙位置が一定となるようにして給紙分離条件を一定に保ち、用紙上限位置の最適化を常に行うようになっている。   The upper limit of the sheet bundle in the sheet feed tray 8 is detected by a sensor 15 comprising a photo interrupter, and the sheet feed position of the sheet is detected by the sensor 15 so that the sheet feed position always varies even when the remaining amount of the sheet is low. The sheet feeding position is controlled by moving the tray bottom plate 6 up and down by the raising motor M so as not to connect. In other words, even when the paper stacking amount increases or decreases, the paper feed position is always kept constant, the paper feed separation condition is kept constant, and the paper upper limit position is always optimized.

なお、センサ15を動作させるアクチュエータ16は、給紙コロ11及び分離コロ12aと連結された構成となっており、アクチュエータ16の端部に配置したフィラーがセンサ15を遮光することにより、常に用紙の上限を検知し、給紙コロ11の位置を一定に保つようになっている。また、用紙の積載量の減少と合わせてトレイ底板6が上昇しても、この位置検知をこのアクチュエータ16によって行える。   The actuator 16 that operates the sensor 15 is connected to the paper feed roller 11 and the separation roller 12a. The filler disposed at the end of the actuator 16 shields the sensor 15 from light, so The upper limit is detected and the position of the paper feed roller 11 is kept constant. Further, even if the tray bottom plate 6 is raised in conjunction with the reduction of the sheet stacking amount, this position detection can be performed by the actuator 16.

この給紙トレイ8は、給紙装置5の装置本体から抜差し可能な構成で、使用者が用紙を給紙トレイ8にセットするときには、給紙トレイ8を引出して行う。   The paper feed tray 8 is configured to be detachable from the main body of the paper feed device 5, and when the user sets paper in the paper feed tray 8, the paper feed tray 8 is pulled out.

図3は、図2中の矢印III方向から見て本発明に係る給紙装置の主要な特徴部分を示す斜視図であり、図4はサイドフェンス面におけるエア噴出口の特徴的な形状を示す図である。図3に示すように各サイドフェンス13の外側にブロワーファン20が取付けられ、ブロワーファン20が生成するエアを噴出するエア噴出口(ノズル)21がサイドフェンス内側面に開口している。エア噴出口21は、上端縁22aの高さ位置が給紙ユニット9により給紙される用紙の通紙経路Pよりも低い位置に配置され、且つ通紙経路Pに沿って延びる第1の噴出口22を有している。   FIG. 3 is a perspective view showing main characteristic portions of the paper feeding device according to the present invention as seen from the direction of arrow III in FIG. 2, and FIG. 4 shows a characteristic shape of the air outlet on the side fence surface. FIG. As shown in FIG. 3, a blower fan 20 is attached to the outside of each side fence 13, and an air outlet (nozzle) 21 through which the air generated by the blower fan 20 is ejected opens on the inner side surface of the side fence. The air ejection port 21 is arranged at a position where the height of the upper edge 22 a is lower than the sheet passing path P of the sheet fed by the sheet feeding unit 9 and extends along the sheet passing path P. It has an outlet 22.

この構成で、満載時と同じ風量にて少量積載の用紙にエアの吹き付けを行うと、用紙が束状で浮き上がり、意図した用紙捌きが行えないことがあり、また少量積載時に、用紙とトレイ底板との間でエアによる用紙バタつきが発生し、騒音などが生じることがあり、そのため、用紙残量に応じて制御的にブロワからのエアの風量を変更させる給紙機構を備えることが提案されているが、制御的にエアの風量をさせるため、ソフトウェアに変更を行わなければならない上に、運用においては制御システムに負荷を与えることとなってしまうことは既述の通りである。   With this configuration, if air is blown onto a small amount of paper with the same airflow as when it is fully loaded, the paper may float up in a bundle and the intended paper cannot be spun. There is a possibility that the paper flutters due to air and causes noise and the like. For this reason, it is proposed to provide a paper feed mechanism that controls the air volume of the blower in a controlled manner according to the remaining amount of paper. However, as described above, since the air volume is controlled in a controlled manner, the software must be changed and the operation system is subjected to a load in operation.

図5は本発明実施例の給紙トレイ8を斜め後ろから見た斜視図、図6は同じく給紙トレイ8を後方から見た図である。これらの図に示すように、本実施例では、トレイ底板6とサイドフェンス13の動きに連動する補助積載部材31に、背面板32を設け、これにより用紙S(具体的には用紙の束であるが、単に用紙と言う。)の残量が少なくなるにつれ背面板32がブロワーファン20の吸気口をふさいで行くため、ブロワーファン20から吹き付けるエアの量を減少させることができ、用紙Sの浮き過ぎ、トレイ底板6上でのバタツキによる騒音を防止することができる。詳細には、ブロワーファン20の吸気口は外側を向いており、トレイ底板6が積載した用紙Sが少なくなるに連れて上昇することに伴い、補助積載部材31および背面板32も上昇するのである。   FIG. 5 is a perspective view of the paper feed tray 8 according to the embodiment of the present invention as seen obliquely from the rear, and FIG. 6 is a view of the paper feed tray 8 as seen from the rear. As shown in these drawings, in this embodiment, a back plate 32 is provided on the auxiliary stacking member 31 that is interlocked with the movement of the tray bottom plate 6 and the side fence 13, so that the sheet S (specifically, a bundle of sheets) is provided. The back plate 32 blocks the air intake port of the blower fan 20 as the remaining amount of the paper is reduced, so that the amount of air blown from the blower fan 20 can be reduced. It is possible to prevent noise due to over-floating and fluttering on the tray bottom plate 6. More specifically, the air inlet of the blower fan 20 faces outward, and the auxiliary stacking member 31 and the back plate 32 also rise as the number of sheets S stacked on the tray bottom plate 6 increases. .

積載されている用紙Sが少ない状態であれば、用紙Sの浮き過ぎ防止、トレイ底板6とのバタツキによる騒音防止の観点から、ブロワーファン20から吹き付けるエアの量は少なくしたほうが良い。   If the number of sheets S loaded is small, it is better to reduce the amount of air blown from the blower fan 20 from the viewpoint of preventing the sheets S from floating too much and preventing noise caused by fluttering with the tray bottom plate 6.

図7、図8は、用紙Sの積載量が残り数十枚程度になった状態を示し、第9、図10は、ペーパーエンド付近での給紙トレイ8の状態である。本実施例の給紙装置では、第7から図10に示すように、用紙Sの残量が少なくなるに連れ、補助積載部材31に取り付けられた背面板32がブロワーファン20の吸気口をふさいで行く。それによりブロワーファン20が吸気する空気量が減少する。そのための結果として、ブロワーファン20から吹き付けるエアの量を抑制することができ、そのため、用紙Sの浮き過ぎ、トレイ底板6とのバタツキによる騒音を防止することができる。   FIGS. 7 and 8 show a state in which the remaining amount of sheets S is about several tens of sheets, and FIGS. 9 and 10 show the state of the paper feed tray 8 near the paper end. In the paper feeder of the present embodiment, as shown in FIGS. 7 to 10, as the remaining amount of paper S decreases, the back plate 32 attached to the auxiliary stacking member 31 blocks the air inlet of the blower fan 20. Go on. As a result, the amount of air taken in by the blower fan 20 is reduced. As a result, the amount of air blown from the blower fan 20 can be suppressed, so that noise due to excessive floating of the paper S and flapping with the tray bottom plate 6 can be prevented.

次に第2の実施例の給紙装置に関して説明を行う。
本実施例では、上記背面板32を取り外し可能とし、そうしたことにより、用紙Sの残量が少ない状態においてもエアの風量を落としたくない場合は、背面板32を取り外せばよいようにしている。背面板32を取り外した状態とすることにより、エアの風量を落とさなく済むようにできるからである。また背面板32を別部品に容易に変更することができるため、ブロワーファン20が吸気する空気量を調整することができ、用紙Sの残量が少なくなった状態での風量を用紙Sの紙種などによって調整することができる。
Next, the paper feeder of the second embodiment will be described.
In the present embodiment, the back plate 32 can be removed, so that the back plate 32 can be removed if it is not desired to reduce the air volume even when the remaining amount of the paper S is small. This is because by removing the back plate 32, it is possible to avoid dropping the air volume. Further, since the back plate 32 can be easily changed to another component, the amount of air sucked by the blower fan 20 can be adjusted, and the air volume when the remaining amount of the paper S is reduced can be adjusted. It can be adjusted depending on the species.

なお背面板32は補助積載部材31にネジ等で取り外し可能な状態で取り付け、固定する構成とすることが好ましいので、図11のように取り外した状態とすることができる。   The back plate 32 is preferably attached and fixed to the auxiliary stacking member 31 in a state where it can be removed with screws or the like, so that it can be removed as shown in FIG.

つまり、用紙残量が少ない状態においてもエアの風量を落としたくない場合は、図11のように背面板32を取り外した状態とすることにより、エアの風量を落とさずに済むようにすることが可能である。   In other words, when it is not desired to reduce the air flow rate even when the remaining amount of paper is low, the rear plate 32 is removed as shown in FIG. 11 so that the air flow rate does not need to be reduced. Is possible.

また、背面板32を補助積載部材31にネジ固定等で取り外し可能な状態としたことで、背面板32を別部品に容易に変更することができる。   In addition, since the back plate 32 can be removed from the auxiliary stacking member 31 by screwing or the like, the back plate 32 can be easily changed to another component.

つまり第12図のように背面板32を穴あき形状などにすることによって、ブロワーファン20が吸気する空気量を調整することができ、用紙残量が少なくなった状態での風量を用紙の紙種などによって調整することができる。   That is, by making the back plate 32 perforated as shown in FIG. 12, the amount of air sucked by the blower fan 20 can be adjusted, and the amount of air when the remaining amount of paper is low can be adjusted. It can be adjusted depending on the species.

1:画像形成装置
2:画像形成装置本体
5:給紙装置
6:トレイ底板
8:給紙トレイ(用紙収納部)
9:給紙ユニット(給紙手段)
11:給紙コロ
12a:分離コロ
12b:戻しコロ
13、14:サイドフェンス
15:センサ
16:アクチュエータ
20:ブロワーファン
21:エア噴出口(ノズル)
22:第1の噴出口
22a:噴出口の上端縁路
31:補助積載部材
32:背面板
M:上昇モータ
P:通紙経
S:用紙
1: Image forming apparatus 2: Image forming apparatus main body 5: Paper feeding apparatus 6: Tray bottom plate 8: Paper feeding tray (paper storage unit)
9: Paper feeding unit (paper feeding means)
11: Paper feed roller 12a: Separation roller 12b: Return roller 13, 14: Side fence 15: Sensor 16: Actuator 20: Blower fan 21: Air outlet (nozzle)
22: First ejection port 22a: Upper edge edge 31 of the ejection port 31: Auxiliary stacking member 32: Back plate M: Lifting motor P: Paper passage S: Paper

特開2007−238239号公報JP 2007-238239 A

Claims (6)

用紙を複数枚束状に積載できる給紙台と、
前記給紙台上に積載された用紙あるいは用紙の束を押し上げる給紙台上昇機構と、
ピックアップコロを備え、最上位の用紙を分離して給紙する分離機構備え、
さらに用紙の側縁部及び/または後縁部を規制するサイドフェンスを備え、
該サイドフェンスの上部にブロワ等のエア吸入用の手段と、吸入したエアの吹き出し用のノズルを設け、
前記エア吸入用手段から送られてきたエアを前記ノズルにより前記給紙台上に積載された用紙の束の上部端面へ吹き付け、最上位の用紙の分離を補助して給紙する給紙装置において、
前記トレイ底板の動きに連動し、前記サイドフェンスに沿って上下可能で、前記ノズルからのエアの吹き出し量を可変させ得る調節部材を設けなる、
ことを特徴とする給紙装置。
A paper tray that can stack multiple sheets of paper,
A paper feed table raising mechanism that pushes up a sheet or a stack of paper stacked on the paper feed table;
Equipped with a pick-up roller, equipped with a separation mechanism that separates and feeds the top sheet,
Furthermore, a side fence that regulates the side edge and / or the rear edge of the paper is provided,
An air suction means such as a blower and a nozzle for blowing out the sucked air are provided on the upper side of the side fence,
In a paper feeding device that feeds air sent from the air suction means to the upper end surface of a stack of paper stacked on the paper feed table by the nozzle, and assists in separating the uppermost paper. ,
In conjunction with the movement of the tray bottom plate, an adjustment member that can move up and down along the side fence and can vary the amount of air blown from the nozzles is provided.
A paper feeder characterized by that.
請求項1の給紙装置において、
前記調節部材が、前記トレイ底板ともに上下動する補助積載部材に設けてあることを特徴とする給紙装置。
The paper feeding device according to claim 1.
The sheet feeding device, wherein the adjusting member is provided on an auxiliary stacking member that moves up and down together with the tray bottom plate.
請求項2の給紙装置において、
前記調節部材が、前記補助積載部材に取り付けられ、前記サイドフェンスの上下動により前記エア吸入用手段のエア吸入可能面積を可変させる板材であることを特徴とする給紙装置。
The paper feeding device according to claim 2.
The sheet feeding device according to claim 1, wherein the adjusting member is a plate member attached to the auxiliary stacking member and configured to vary an air suckable area of the air sucking means by the vertical movement of the side fence.
請求項3の給紙装置において、
上記調節部材である板材を前記サイドフェンスから取り外し可能としたことを特徴とする給紙装置。
The paper feeding device according to claim 3.
A sheet feeding device characterized in that the plate member as the adjusting member can be detached from the side fence.
請求項4の給紙装置において、
前記エア吸入手段の吸気口が前記サイドフェンスの外側に向けて設けてあり、前記板材が前記サイドフェンスの外側面に沿って移動することを特徴とする給紙装置
The paper feeding device according to claim 4.
An air inlet of the air suction means is provided toward the outside of the side fence, and the plate member moves along the outer surface of the side fence.
請求項1から5のいずれかに記載の給紙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 paper feeding device according to claim 1.
JP2009051282A 2009-03-04 2009-03-04 Paper feeder and image forming device Pending JP2010202372A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08333032A (en) * 1995-06-09 1996-12-17 Canon Inc Sheet feeding device and image forming device
JPH11139600A (en) * 1997-11-06 1999-05-25 Ricoh Co Ltd Air separation paper feeding device
JP2001088964A (en) * 1999-07-19 2001-04-03 Fuji Xerox Co Ltd Sheet feeder
JP2008239312A (en) * 2007-03-28 2008-10-09 Konica Minolta Business Technologies Inc Paper feeding device and image formation device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08333032A (en) * 1995-06-09 1996-12-17 Canon Inc Sheet feeding device and image forming device
JPH11139600A (en) * 1997-11-06 1999-05-25 Ricoh Co Ltd Air separation paper feeding device
JP2001088964A (en) * 1999-07-19 2001-04-03 Fuji Xerox Co Ltd Sheet feeder
JP2008239312A (en) * 2007-03-28 2008-10-09 Konica Minolta Business Technologies Inc Paper feeding device and image formation device

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