JP2003255636A - Sheet feeding apparatus and image forming apparatus - Google Patents
Sheet feeding apparatus and image forming apparatusInfo
- Publication number
- JP2003255636A JP2003255636A JP2002145141A JP2002145141A JP2003255636A JP 2003255636 A JP2003255636 A JP 2003255636A JP 2002145141 A JP2002145141 A JP 2002145141A JP 2002145141 A JP2002145141 A JP 2002145141A JP 2003255636 A JP2003255636 A JP 2003255636A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- sheet feeding
- feeding device
- feed tray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、用紙給紙方向とほ
ぼ直交する方向に引き出し可能に装着される給紙トレイ
と、この給紙トレイ上に載置された用紙の給紙方向と直
交する方向（幅方向）端縁の給紙トレイからの逸脱を記
載する規制するサイド規制部材とを有する給紙装置、及
びこの給紙装置を備えた複写機、ファクシミリ、プリン
タ等の画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed tray mounted so as to be pulled out in a direction substantially orthogonal to a paper feed direction, and a paper feed direction of a paper placed on the paper feed tray. The present invention relates to a sheet feeding device having a side regulating member that regulates deviation of a direction (width direction) edge from a sheet feeding tray, and an image forming apparatus such as a copying machine, a facsimile, and a printer including the sheet feeding device.
【０００２】[0002]
【従来の技術】複写機、ファクシミリ、プリンタ等の画
像形成装置の装置本体内に収納された位置から装置本体
前方へ引き出し自在にレールによって支持された給紙ト
レイと、収納位置にある給紙トレイ上の用紙を給紙トレ
イの引き出し方向とほぼ直交する方向に給紙する給紙手
段と、該給紙トレイ上に載置された用紙の給紙方向と平
行な方向へ延びる幅方向端縁を規制するサイド規制部材
と、を有する所謂フロントローディングタイプの給紙装
置が従来から知られている。この種の給紙装置の給紙ト
レイ１００上には、図１３に示すように、用紙Ｐを収容
した給紙トレイ１００内に配置され、矢印Ａで示す給紙
方向に対して直交する方向（幅方向Ｂ）の用紙両端縁の
位置を規制する一対のサイドフェンス１０１，１０２
と、給紙方向Ａの上流側の用紙後端の位置を規制するエ
ンドフェンス１０３とが設けられている。給紙トレイ１
００内に載置された用紙Ｐは、底板上昇装置（図示せ
ず）によって最上部の用紙が給紙手段による給紙位置に
達する高さまで上昇した後、フィードローラ等の給紙手
段によって給紙される。2. Description of the Related Art A paper feed tray supported by rails so that it can be pulled out from a position housed in an apparatus body of an image forming apparatus such as a copying machine, a facsimile, a printer or the like, and a paper feed tray in the housing position. A sheet feeding unit that feeds the upper sheet in a direction substantially orthogonal to the pulling direction of the sheet feeding tray, and a width direction edge that extends in a direction parallel to the sheet feeding direction of the sheet placed on the sheet feeding tray are provided. A so-called front loading type sheet feeding device having a side regulating member for regulating has been conventionally known. As shown in FIG. 13, a sheet feeding tray 100 of this type of sheet feeding device is disposed inside the sheet feeding tray 100 that stores the sheets P, and is in a direction orthogonal to the sheet feeding direction indicated by an arrow A ( A pair of side fences 101 and 102 that regulate the positions of both edges of the paper in the width direction B).
And an end fence 103 that regulates the position of the trailing edge of the sheet on the upstream side in the sheet feeding direction A. Paper tray 1
The sheet P placed in 00 is fed by a sheet feeding means such as a feed roller after the bottom plate raising device (not shown) raises the uppermost sheet to a height at which it reaches the sheet feeding position by the sheet feeding means. To be done.
【０００３】このように構成された従来の給紙装置にお
いては、給紙時に給紙トレイ１００上でジャムが発生す
ると、用紙を給紙トレイ１００から送り出すフィードロ
ーラ付近でジャムした用紙Ｐの先端が止まってしまるこ
とがある（図示Ｐ’の状態）。このように用紙先端がフ
ィードローラ付近で停止した状態のとき、ユーザがジャ
ム紙Ｐ’を除去しようとして給紙トレイ１００を矢印Ｂ
方向に引き出すと、ジャム紙Ｐ ’が奥側のサイドフェ
ンス１０１を乗り越え易くなる。特に小サイズ用紙の場
合には、給紙トレイの右壁１００’（用紙搬送方向下流
側の壁）と奥側のサイドフェンス１０１との間の間隙Ｓ
をすり抜けて、図７の点線で示すように装置本体内に残
ってしまうことがあった。このようにサイドフェンス１
０１を乗り越えたジャム紙Ｐ’が装置本体内に残ってし
まうと、ユーザが除去することが極めて困難になり、サ
ービスマンに依頼しなければならないコールジャムとな
る。このようなコールジャムが発生すると、ユーザ側で
対応することができないので、迅速なジャム処理が不可
能となり、稼働率を低下させることになる。In the conventional paper feeding apparatus having such a structure, when a jam occurs on the paper feeding tray 100 during paper feeding, the front end of the jammed paper P is fed near the feed roller for feeding the paper from the paper feeding tray 100. It may stop (state P'in the figure). When the leading edge of the paper is stopped near the feed roller in this way, the user moves the paper feed tray 100 to the arrow B to remove the jammed paper P ′.
When the jammed paper P ′ is pulled out in the direction, the jammed paper P ′ can easily get over the back side fence 101. Particularly in the case of small size paper, the gap S between the right wall 100 ′ (the wall on the downstream side in the paper transport direction) of the paper feed tray and the back side fence 101.
There is a case where it passes through and remains in the apparatus main body as shown by the dotted line in FIG. Side fence 1
If the jammed paper P ′ that has surpassed 01 is left in the main body of the apparatus, it becomes extremely difficult for the user to remove it, resulting in a call jam that must be requested to the service person. When such a call jam occurs, it is impossible for the user to deal with the jam, so that quick jam processing cannot be performed and the operation rate is reduced.
【０００４】一方、この種の装置として例えば特開平９
−７７２９１号公報や特開平９−１７５６７７号公報記
載の発明が公知である。特開平９−７７２９１号公報に
は、前記と同様な状況下における残紙防止機構が記載さ
れている。すなわち、この従来例では、前記図１３にお
ける奥側のサイドフェンス１０１の上端部に集積された
用紙束の上方に突き出された突き出し部を設け、給紙ト
レイを引き出したときにジャム紙が装置本体内に残って
しまうことを防止するようにしている。On the other hand, an apparatus of this type is disclosed in, for example, Japanese Patent Laid-Open No.
The inventions described in JP-A-77291 and JP-A-9-175677 are known. Japanese Unexamined Patent Publication No. 9-77291 describes a residual paper prevention mechanism under the same situation as described above. That is, in this conventional example, a protruding portion that protrudes above the stack of sheets is provided at the upper end of the side fence 101 on the far side in FIG. 13, and the jammed paper is ejected when the paper feed tray is pulled out. I try to prevent it from remaining inside.
【０００５】また、特開平９−１７５６７７号公報に
は、最上紙の用紙先端の両隅を押さえる所謂用紙押さえ
部材を設け、この部材によって用紙の位置を規制し、用
紙トレイを引き出した時に用紙が装置内に残らないよう
にする技術が開示されている。Further, in Japanese Patent Laid-Open No. 9-175677, there is provided a so-called paper pressing member that presses both corners of the leading edge of the uppermost paper, the position of the paper is regulated by this member, and the paper is ejected when the paper tray is pulled out. A technique for preventing the device from remaining in the device is disclosed.
【０００６】[0006]
【発明が解決しようとする課題】ところで、前記特開平
９−７７２９１号公報記載の発明におけるこの突き出し
部は、載置される用紙のセット領域（奥側端縁）よりも
奥側に退避している。そのため給紙トレイを引出した時
にジャム用紙が奥側のサイドフェンス（図７における１
０１に対応）に突き当たり、大きく撓むと、サイドフェ
ンスを乗り越える際に突き出し部にも用紙が引っかから
ないことがある。そこで、この突き出し部が設けられた
サイドフェンスを高くすれば、乗り越えようとする用紙
を確実に引掛けることが可能となるが、近年の画像形成
装置では、給紙トレイの多段化により一段当たりの高さ
が抑えられているため、突き出し部の高さを充分に取れ
ない場合が多くなってきている。By the way, in the invention described in the above-mentioned Japanese Patent Application Laid-Open No. 9-77291, this protruding portion is retracted to the back side from the setting area (back side edge) of the paper to be placed. There is. Therefore, when the paper feed tray is pulled out, the jammed paper is jammed with the side fence (1 in FIG. 7).
(Corresponding to 01), the sheet may not be caught in the protruding portion when getting over the side fence. Therefore, if the side fence provided with this protruding portion is raised, it is possible to reliably catch the paper which is going to get over, but in recent image forming apparatuses, the number of paper feed trays has been increased to one per tray. Since the height is suppressed, there are many cases where the height of the protruding portion cannot be sufficiently obtained.
【０００７】また、特開平９−１７５６７７号公報に記
載されている残紙防止機構は、前記最上位の両隅を押さ
える用紙押さえ部材を配置し、用紙の乗り越えを防止し
ているが、構成が複雑で、前記部材が奥側のサイドフェ
ンス（図７における１０１に対応）と手前側のサイドフ
ェンス（図７における１０２に対応）から大きく用紙側
に突き出しているため、用紙補充が困難となってしま
う。本発明はこのような従来技術の実情に鑑みてなされ
たもので、その目的は、給紙方向と給紙トレイの引き出
し方向とが直交するフロントローディングタイプの給紙
装置において、給紙トレイの高さ方向の寸法を抑えるこ
とが可能で、用紙ジャム時に用紙が装置本体内に残るこ
とがない給紙装置及びそのような給紙装置を備えた画像
形成装置を提供することにある。Further, in the remaining paper preventing mechanism described in Japanese Patent Laid-Open No. 9-175677, a paper pressing member for pressing the uppermost two corners is arranged to prevent the paper from passing over. Since the member is complicated and protrudes largely from the back side fence (corresponding to 101 in FIG. 7) and the front side fence (corresponding to 102 in FIG. 7) to the paper side, it becomes difficult to replenish the paper. I will end up. The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to increase the height of the paper feed tray in a front loading type paper feed device in which the paper feed direction and the paper feed tray withdrawing direction are orthogonal to each other. It is an object of the present invention to provide a sheet feeding device that can suppress the dimension in the vertical direction and does not leave a sheet in the apparatus main body when a sheet is jammed, and an image forming apparatus including such a sheet feeding device.
【０００８】また、他の目的は、給紙トレイ内に用紙を
セットする際に用紙の破損を防止し、ユーザの操作性向
上を図ることができる給紙装置及びそのような給紙装置
を備えた画像形成装置を提供することにある。Another object of the present invention is to provide a paper feeding device and a paper feeding device which prevent damage to the paper when setting the paper in the paper feeding tray and improve user operability. Another object is to provide an image forming apparatus.
【０００９】さらに、他の目的は、前記給紙装置におけ
る残紙処理能力を更に高めることが可能な給紙装置及び
そのような給紙装置を備えた画像形成装置提供すること
にある。Still another object of the present invention is to provide a sheet feeding device capable of further improving the remaining sheet processing capability of the sheet feeding device and an image forming apparatus equipped with such a sheet feeding device.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成するた
め、第１の手段は、装置本体前面から前方へ引き出し自
在に支持された給紙トレイと、該給紙トレイ上の用紙を
給紙トレイの引き出し方向と直交する方向へ給紙する給
紙手段と、前記給紙トレイ上の用紙の用紙搬送方向に直
交する方向の端縁の位置を規制する規制部材と、前記給
紙トレイ引き出し時にジャムした用紙を給紙トレイとと
もに引き出すための係合部材と、を備えた給紙装置にお
いて、前記係合部材を、前記給紙トレイの引き出し方向
奥側の規制部材の用紙搬送方向下流側の端部に、用紙搬
送方向下流側に突出するように固設したことを特徴とす
る。In order to achieve the above object, a first means is a paper feed tray supported so as to be able to be pulled out forward from the front surface of the apparatus main body, and a paper feed tray for feeding the paper on the paper feed tray. Paper feed means for feeding paper in a direction orthogonal to the paper feed direction, a regulating member for regulating the position of the edge of the paper on the paper feed tray in the direction orthogonal to the paper transport direction, and a jam when the paper feed tray is pulled out. A sheet feeding device including an engaging member for pulling out the formed sheet together with the sheet feeding tray, wherein the engaging member is an end portion of the regulating member on the back side of the sheet feeding tray in the sheet conveying direction. Further, it is characterized in that it is fixed so as to project to the downstream side in the paper transport direction.
【００１１】このように係合部材を設けると、用紙がジ
ャムして給紙トレイを引き出したときに用紙の撓みが少
ない位置で係合部材が用紙端部に係合し、給紙トレイの
引き出し動作に伴って確実に用紙を引き出すことができ
る。If the engaging member is provided in this way, the engaging member engages with the end portion of the sheet at a position where the sheet is not jammed and the sheet is bent little when the sheet is pulled out, and the sheet is pulled out. The paper can be reliably pulled out in accordance with the operation.
【００１２】この場合、前記係合部材の先端側には少な
くとも平面状の部分を設け、その下面が給紙トレイセッ
ト時に最上位の用紙の上面に接触しない最小限の間隔離
間した位置に前記係合部材を設ける。これによって、給
紙トレイの高さ方向の寸法を最小限に抑えた上で、係合
部材の機能を発揮させることができる。また、前記係合
部材と前記規制部材の端部との間に用紙の端縁を挟み込
む空隙部を設ける。これにより、用紙端部と係合部材と
の係合がより確実に行え、用紙を容易に捕捉できる。In this case, at least a planar portion is provided on the tip side of the engaging member, and the lower surface of the engaging member is separated by a minimum distance so as not to contact the upper surface of the uppermost sheet at the time of setting the paper feed tray. Provide a mating member. As a result, the function of the engaging member can be exerted while minimizing the size of the paper feed tray in the height direction. Further, a space is provided between the engaging member and the end of the regulating member so as to sandwich the edge of the sheet. Thereby, the edge of the sheet and the engaging member can be engaged more reliably, and the sheet can be easily captured.
【００１３】なお、前記空隙部は、前記規制部材の用紙
が当接する面から給紙トレイの引き出し方向に対して後
退した部分を含むようにする。これにより空隙の部分が
平面視、正面視、側面視、鉤型に形成され、用紙の捕捉
がより確実になる。The gap portion includes a portion retracted from the surface of the regulating member with which the sheet abuts in the drawing direction of the sheet feeding tray. As a result, the void portion is formed in a plan view, a front view, a side view, and a hook shape, so that the sheet can be captured more reliably.
【００１４】また、前記係合部材の前記給紙トレイの用
紙集積部側の端部を前記用紙集積部側に微小量突出させ
るとよい。前記端部は前記規制部材の用紙規制側の面か
ら前記用紙集積部側に突出させない方が用紙のセット性
が良く、突出させなくとも充分に機能するが、微小量突
出させることにより用紙の捕捉性が向上する。その際、
前記用紙集積部側の端部を、先端部が給紙トレイの底板
に近接するように傾斜させれば、さらに捕捉性が向上す
る。更に、このように傾斜させることにより、係合部材
が用紙集積部側に微少量突出している場合でも、給紙ト
レイ内に用紙をセットする際に用紙が破損する可能性を
最小限にすることができる。Further, it is preferable that an end portion of the engaging member on the paper stacking portion side of the paper feed tray is made to project a minute amount toward the paper stacking portion side. It is better not to project the end portion from the surface on the paper regulation side of the regulation member to the paper stacking portion side, and the paper setting property is good, and even if it is not projected, it works sufficiently. The property is improved. that time,
If the end portion on the side of the sheet stacking portion is inclined so that the front end portion is close to the bottom plate of the sheet feeding tray, the trapping property is further improved. Further, by inclining in this way, even if the engaging member slightly protrudes toward the paper stacking unit side, the possibility of damaging the paper when setting the paper in the paper feed tray is minimized. You can
【００１５】第２の手段は、第１の手段において、前記
係合部材の用紙搬送方向上流側の前記給紙トレイの引き
出し方向奥側の規制部材に、前記規制部材との間に所定
の空隙を備えた第２の係合部材を設けたことを特徴とす
る。このように構成すると、規制部材端部に設けた係合
部材によって用紙の捕捉がうまく行われなかった場合
に、第２の係合部材によって用紙搬送方向上流側で用紙
端部を捕捉することができる。According to a second means, in the first means, a regulating member is provided on the regulating member on the upstream side of the engaging member in the sheet conveying direction and on the rear side in the drawing direction of the paper feed tray, and a predetermined gap is provided between the engaging member and the regulating member. And a second engaging member provided with. According to this structure, when the sheet is not successfully captured by the engagement member provided at the end of the regulation member, the sheet end can be captured on the upstream side in the sheet conveyance direction by the second engagement member. it can.
【００１６】その際、前記規制部材を切り欠くことによ
って前記空隙を形成し、さらに、前記第２の係合部材の
用紙搬送方向下流側に突出部を形成する。これにより、
規制部材の成形時に簡単に空隙を設けることができ、用
紙の捕捉性も前記空隙と突出部とによりさらに向上す
る。また、第２の係合部材の設置位置を前記給紙トレイ
に載置される用紙のうちの最小サイズの用紙の中央付近
に設定する。これにより第２の係合部材の捕捉機能を確
実に発揮させることができる。At this time, the gap is formed by notching the regulating member, and further, a protruding portion is formed on the downstream side of the second engaging member in the sheet conveying direction. This allows
A void can be easily provided at the time of molding the regulating member, and the paper catching property is further improved by the void and the protruding portion. Further, the installation position of the second engagement member is set near the center of the smallest size sheet of the sheets placed on the sheet feed tray. As a result, the capturing function of the second engaging member can be reliably exerted.
【００１７】第３の手段は、第１または第２の手段に係
る用紙処理装置と、可視画像によって画像を形成する画
像形成手段とをから画像形成装置を構成することを特徴
とする。これにより、用紙ジャム時に用紙が装置本体内
に残らずに給紙トレイとともに確実に引き出すことがで
きる画像形成装置を提供することが可能となる。A third means is characterized in that the image forming apparatus comprises the paper processing apparatus according to the first or second means and an image forming means for forming an image by a visible image. As a result, it is possible to provide an image forming apparatus that can reliably pull out the paper together with the paper feed tray without the paper remaining in the apparatus main body when the paper is jammed.
【００１８】[0018]
【発明の実施の形態】以下、図面を参照し、本発明の実
施形態について説明する。DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１９】＜第１の実施形態＞図１は、本発明の一実
施形態に係る給紙装置を備えた画像形成装置としての複
写装置を正面側から見た概略構成図である。<First Embodiment> FIG. 1 is a schematic configuration view of a copying apparatus as an image forming apparatus including a paper feeding apparatus according to an embodiment of the present invention as viewed from the front side.
【００２０】図１において、複写装置１は複写装置本体
１ａと給紙台１ｂとからなり、給紙台１ｂの上に複写装
置本体１ａが載置され、１つのシステムを構成してい
る。複写装置本体１ａと給紙台１ｂには、給紙トレイ２
が装着される給紙トレイ装着部が設けられており、本例
では複写装置１ａに１段、給紙装置１ｂに２段の給紙ト
レイ２が配設されている。この給紙トレイ２は、例えば
図８に示すように両側に設けられたレール１４により前
後方向にスライドさせて装置本体１ａの前面、あるいは
給紙台１ｂの前面から矢印Ｂで示した方向（前方向）に
引き出すことができる。なお、ここでいう前方向とは装
置を操作するときにユーザが対向する面である装置前面
の方向を言う。また、給紙台１ｂの給紙トレイ２から複
写装置本体１ａに用紙を給紙するための縦搬送部１ｉが
図示右側面に開閉可能に設けられている。In FIG. 1, the copying machine 1 comprises a copying machine main body 1a and a paper feed tray 1b, and the copying machine main body 1a is placed on the paper feed tray 1b to form one system. A paper feed tray 2 is provided on the copying apparatus main body 1a and the paper feed tray 1b.
Is provided, and in this example, the copying apparatus 1a is provided with one sheet feeding tray 2 and the sheet feeding apparatus 1b is provided with two sheet feeding trays 2. For example, as shown in FIG. 8, the paper feed tray 2 is slid in the front-rear direction by rails 14 provided on both sides to slide the paper feed tray 2 from the front surface of the apparatus main body 1a or the front surface of the paper feed tray 1b in the direction indicated by arrow B (front Direction). The front direction here means the direction of the front surface of the device, which is the surface that the user faces when operating the device. Further, a vertical transport unit 1i for feeding a sheet from the sheet feed tray 2 of the sheet feed tray 1b to the copying apparatus main body 1a is provided on the right side surface in the figure so as to be openable and closable.
【００２１】複写装置本体１ａには、原稿を読み取り、
感光体１ｄの表面に書き込む画像読み取りユニット（ス
キャナ）１ｃ、感光体１ｄの表面に書き込まれた潜像を
現像して可視化し、給紙トレイ２から搬送されてきた用
紙上に転写する作像ユニット１ｅ、画像が転写された用
紙に対して画像を定着させる定着ユニット１ｆが設けら
れ、画像が定着された用紙は排紙ローラ１ｇから排紙ト
レイ１ｈに排紙される。The original is read on the copying apparatus main body 1a,
An image reading unit (scanner) 1c for writing on the surface of the photoconductor 1d, an image forming unit for developing and visualizing the latent image written on the surface of the photoconductor 1d, and transferring it onto the paper conveyed from the paper feed tray 2. 1e, a fixing unit 1f for fixing an image to a sheet onto which an image has been transferred is provided, and the sheet on which the image is fixed is discharged from a discharge roller 1g to a discharge tray 1h.
【００２２】図２は給紙装置の給紙トレイ部分を示す平
面図、図３、図４及び図５はそれぞれ図２のＩ−Ｉ線断
面図、II−II線断面図、III−III断面図で、図４及び図
５は用紙が撓んだ状態を示している。また、図６は図３
Ｍ部分の拡大図、図７は図５Ｎ部分の拡大図である。FIG. 2 is a plan view showing a sheet feeding tray portion of the sheet feeding device, and FIGS. 3, 4 and 5 are sectional views taken along line I--I, sectional view taken along line II--II and sectional view taken along line III--III of FIG. 2, respectively. 4 and 5 show a state in which the sheet is bent. 6 is shown in FIG.
FIG. 7 is an enlarged view of the M portion, and FIG. 7 is an enlarged view of the N portion in FIG.
【００２３】図２ないし図５において、給紙トレイ２内
には矢印Ａで示す給紙方向に対して略直交する幅方向の
用紙Ｐ端縁の位置を規制する規制部材としての一対のサ
イドフェンス３，４と、給紙方向Ａに沿った用紙Ｐの後
端縁の位置を規制するエンドフェンス５とが設けられ、
用紙Ｐは図３に示す底板６上に載置される。この底板６
には、底板上昇装置が設けられており、底板上昇装置は
底板６を押し上げる上昇アーム７、該上昇アーム７を回
動させる上昇軸８を備え、上昇軸８に対しては装置本体
１側に設けられた上昇モータ９により回転駆動力が伝達
される。底板は平面視Ｔ字形に形成され、前記サイドフ
ェンス３，４よりも用紙搬送方向下流側の底板の部分
（拡幅部）６ａは最大紙の幅に対応した寸法に設定さ
れ、サイドフェンス３，４の間に位置する部分６ｂは最
小紙の幅に対応した寸法に設定されている。これにより
種々の用紙サイズに１つの給紙トレイ２で対応できるよ
うに構成されたものでは、サイドフェンス３，４の用紙
搬送方向下流側と給紙トレイ２の右壁（用紙搬送方向下
流側の壁）２ａとの間に空間部が形成され、この間で前
記拡幅部６ａが上昇下降可能になっている。In FIGS. 2 to 5, a pair of side fences as regulating members for regulating the position of the edge of the paper P in the width direction substantially orthogonal to the paper feeding direction indicated by the arrow A in the paper feeding tray 2. 3, 4 and an end fence 5 that regulates the position of the trailing edge of the paper P along the paper feed direction A are provided.
The paper P is placed on the bottom plate 6 shown in FIG. This bottom plate 6
Is provided with a bottom plate raising device. The bottom plate raising device is provided with a raising arm 7 for pushing up the bottom plate 6 and a raising shaft 8 for rotating the raising arm 7, and the raising shaft 8 is provided on the apparatus body 1 side. Rotational driving force is transmitted by the ascending motor 9 provided. The bottom plate is formed in a T shape in a plan view, and the bottom plate portion (widened portion) 6a on the downstream side of the side fences 3 and 4 in the sheet conveying direction is set to a size corresponding to the maximum width of the paper. The portion 6b located between the two is set to a size corresponding to the width of the smallest sheet. With this configuration, one sheet feeding tray 2 can be used for various sheet sizes. In the sheet feeding direction downstream side of the side fences 3 and 4 and the right wall of the sheet feeding tray 2 (downstream side in the sheet conveying direction). A space is formed between the wall) 2a and the widened portion 6a can be raised and lowered during this space.
【００２４】給紙トレイ２が装置本体１内にセットされ
ると、図示しないセット検知手段によりトレイセットが
検知され、上昇モータ９が回転し、カップリング１０と
上昇軸８との噛み合いにより上昇軸８に駆動力が伝達さ
れ、上昇アーム７が底板６を押し上げる。そして、最上
用紙Ｐが給紙位置まで達すると、上昇モータ９が駆動を
停止し、給紙可能状態となる。また、給紙トレイ２を装
置本体１から引き出すと、カップリング１０と上昇軸８
の噛み合いが外れ、用紙Ｐ及び底板６は自然落下する。When the paper feed tray 2 is set in the apparatus main body 1, the tray set is detected by a set detecting means (not shown), the raising motor 9 is rotated, and the coupling 10 and the raising shaft 8 are engaged with each other to raise the raising shaft. The driving force is transmitted to 8, and the raising arm 7 pushes up the bottom plate 6. Then, when the uppermost sheet P reaches the sheet feeding position, the raising motor 9 stops driving and the sheet can be fed. When the paper feed tray 2 is pulled out from the apparatus main body 1, the coupling 10 and the lifting shaft 8 are
Is disengaged, and the paper P and the bottom plate 6 are naturally dropped.
【００２５】装置本体１側に設けられている給紙手段は
それ自体公知の摩擦分離方式の給紙手段であって、ピッ
クアップローラ１１、フィードローラ１２及びリバース
ローラ１３の主要な３つのローラからなり、ピックアッ
プローラ１１、フィードローラ１２はアイドラ（図示せ
ず）によって連動して駆動される。リバースローラ１３
は、常時、送り方向とは逆方向に回転し、用紙Ｐを１枚
ずつ分離する。また、サイドフェンス３，４のうち、給
紙トレイ２の引き出し方向Ｂに対して奥側のサイドフェ
ンス３には、残紙防止用の係合部材としての突き出し部
１５が設けられている。この突き出し部１５は、図６に
示すように前記拡幅部６ａ側へオーバーハングして突き
出す突き出し板部１７と、奥側のサイドフェンス３と突
き出し板部１７を連結する結合部（基部）１６とから構
成されている。The sheet feeding means provided on the side of the apparatus main body 1 is a known friction separation type sheet feeding means, and is composed of three main rollers: a pickup roller 11, a feed roller 12 and a reverse roller 13. The pickup roller 11 and the feed roller 12 are driven by an idler (not shown) in conjunction with each other. Reverse roller 13
Always rotates in the direction opposite to the feeding direction and separates the sheets P one by one. Further, among the side fences 3 and 4, the side fence 3 on the back side with respect to the drawing direction B of the paper feed tray 2 is provided with a protruding portion 15 as an engaging member for preventing remaining paper. As shown in FIG. 6, the protruding portion 15 includes a protruding plate portion 17 that overhangs and protrudes toward the widened portion 6a side, and a joint portion (base portion) 16 that connects the back side fence 3 and the protruding plate portion 17 to each other. It consists of
【００２６】図３ないし図７に示すように、突き出し部
１５の突き出し板部１７は用紙の最上面より上方に位置
して用紙がセット（集積）される領域Ｒ側に張り出し、
かつ奥側のサイドフェンス３の搬送方向下流側端部より
も更に下流位置に配されているので、図６に示すよう
に、該突き出し部１５の突き出し板部１７と奥側のサイ
ドフェンス３の搬送方向下流側端部との間に隙間ｒ１
（突き出し板部１７が存在しない領域）を有する。ま
た、該隙間ｒ１はサイドフェンス３と突き出し板部１７
を結合部１６で連結することにより形成されるが、この
結合部１６は奥側のサイドフェンス３よりも装置前面側
に載置される用紙のセット領域Ｒ（用紙奥側端縁）より
もさらに奥側に退避しているため、図７にも示すように
空間ｒ２を有している。そして、前記隙間ｒ１と前記空
間ｒ２とによって用紙端部に係合する空隙部が形成され
ることになる。更に、図６に示したように突き出し部１
５の突き出し板部１７の下面１７ｃの高さ位置は底板上
昇時の最上部用紙Ｐが当接しない高さｈが保持されるよ
うに設けられている。これは、用紙への加傷、底板への
加傷および突き出し部１５の損傷を防止するためであ
る。As shown in FIGS. 3 to 7, the protruding plate portion 17 of the protruding portion 15 is located above the uppermost surface of the paper and projects toward the area R where the paper is set (stacked).
Further, since it is arranged at a position further downstream than the downstream end of the side fence 3 on the back side in the transport direction, as shown in FIG. 6, the protruding plate portion 17 of the protruding portion 15 and the side fence 3 on the back side are arranged. A gap r1 is formed between the downstream end portion in the transport direction.
(A region where the protruding plate portion 17 does not exist). Further, the gap r1 is formed by the side fence 3 and the protruding plate portion 17
Is formed by connecting the sheets to each other by a connecting portion 16, and the connecting portion 16 is further formed than a setting area R (sheet rear side edge) of a sheet placed on the front side of the apparatus with respect to the side fence 3 on the rear side. Since it is retracted to the back side, it has a space r2 as shown in FIG. Then, the gap r1 and the space r2 form a void portion that engages with the end portion of the sheet. Furthermore, as shown in FIG.
The height position of the lower surface 17c of the protruding plate 17 of No. 5 is provided so that the height h at which the uppermost sheet P does not contact when the bottom plate rises is maintained. This is to prevent damage to the paper, damage to the bottom plate, and damage to the protruding portion 15.
【００２７】複写装置１などの画像形成装置では、機械
内部でジャムが発生した場合、ジャム状態がひどくなる
のを防ぐためにジャム検知された時点で駆動を即時停止
する。このとき、複写装置１あるいは給紙装置１ｂの縦
搬送部１ｉを開放してジャム処理を行うが（図１参
照）、用紙先端がフィードローラ１２付近で止まってし
まったジャム紙Ｐ’は、縦搬送部１ｉ側から処理するこ
とはできない。そこで、給紙トレイ２を引き出すことに
なる。このように給紙トレイ２を矢印Ｂ方向に引き出す
と、ジャム紙Ｐ’の奥側の端縁が奥側のサイドフェンス
３と突き当たり、図４に示すように大きく撓むことがあ
る。このとき、該突き出し部１５が奥側のサイドフェン
ス３の上方まで続いて単に上方向に突き出しているよう
な形状では、用紙が大きく撓んだところから奥側のサイ
ドフェンス３及び突き出し部１５をも乗り越えて給紙ト
レイ２のみが引き出され、ジャム紙Ｐ’が本体に残留す
ることがあった。これに対して、本実施形態では突き出
し部１５は奥側のサイドフェンス３の給紙方向下流側の
端縁よりも更に給紙方向下流側に位置しているため、図
５に示すように用紙の奥側端縁のうち、撓みの少ない下
流側端縁部分が突き出し部１５の隙間ｒ１から空間ｒ２
に入り込む。このようにして突き出し部１５の突き出し
板部１７によって形成される隙間ｒ１と空間ｒ２とから
なる空隙部によってジャム紙Ｐ’を突き出し部１５に引
掛けることができる。これにより、用紙の図４に示すよ
うな用紙の撓みに関係なくジャムした用紙Ｐ’を捕捉す
ることが可能となり、確実にジャム紙Ｐ’を給紙トレイ
２とともに引き出すことができる（図８）。なお、図４
のような撓みが発生するのは、特に用紙搬送方向の中央
部にフィードローラ１１が位置し、フィードローラ１１
によって用紙の搬送方向の中央部が押さえられた状態で
奥側から手前側に給紙トレイ２が引き出されるからであ
る。In the image forming apparatus such as the copying machine 1, when a jam occurs inside the machine, the driving is immediately stopped at the time when the jam is detected in order to prevent the jammed state from becoming serious. At this time, the vertical conveyance unit 1i of the copying apparatus 1 or the paper feeding apparatus 1b is opened to perform the jam processing (see FIG. 1), but the jammed paper P ′ whose leading edge is stopped near the feed roller 12 is It cannot be processed from the transport unit 1i side. Then, the paper feed tray 2 is pulled out. When the paper feed tray 2 is pulled out in the direction of the arrow B in this manner, the rear edge of the jammed paper P ′ may abut the rear side fence 3 and be largely bent as shown in FIG. At this time, in the shape in which the protruding portion 15 continues to the upper side of the back side fence 3 and only protrudes upward, the side fence 3 and the protruding portion 15 on the back side are moved from the position where the paper is largely bent. In some cases, the paper feed tray 2 was pulled out after overcoming the jam, and the jammed paper P ′ remained in the main body. On the other hand, in the present embodiment, since the protruding portion 15 is located further downstream in the paper feeding direction than the edge of the far side fence 3 on the downstream side in the paper feeding direction, as shown in FIG. Of the inner edge of the rear side, the lower edge portion of the downstream side edge portion, which has less bending, moves from the gap r1 of the protruding portion 15 to the space r2.
Get in. In this way, the jammed paper P ′ can be hooked on the protruding portion 15 by the gap portion formed by the protruding plate portion 17 of the protruding portion 15 and formed by the gap r1 and the space r2. As a result, the jammed paper P ′ can be captured regardless of the bending of the paper as shown in FIG. 4, and the jammed paper P ′ can be reliably pulled out together with the paper feed tray 2 (FIG. 8). . Note that FIG.
Deflection like this occurs especially when the feed roller 11 is located at the central portion in the paper transport direction.
This is because the paper feed tray 2 is pulled out from the back side to the front side in a state in which the central portion in the sheet conveying direction is pressed by.
【００２８】また、本実施形態のように、サイドフェン
ス３の搬送方向下流端部より更に下流側に突き出し部１
５を排紙すると、特に小サイズ用紙の場合に見られる給
紙トレイの右壁２ａと奥側のサイドフェンス３の隙間を
用紙後端がすり抜けるような残紙の発生も防止すること
ができる。Further, as in the present embodiment, the protruding portion 1 is located further downstream than the downstream end of the side fence 3 in the carrying direction.
When paper 5 is ejected, it is possible to prevent the occurrence of residual paper, which is seen especially in the case of small-sized paper, in which the rear end of the paper slips through the gap between the right wall 2a of the paper feed tray and the side fence 3 on the back side.
【００２９】また、本実施形態においては、図５及び図
７に示すように、突き出し板部１７の装置前面側の端部
１７ａの位置を、トレイ上に載置される用紙のセット領
域Ｒの奥側端縁よりも用紙側（前面側）に微小量ｄだけ
突出させている。これにより、ジャム紙は更に隙間ｒ１
及び空間ｒ２に入り込み易くなり、突き出し部１５に引
っ掛かって、給紙トレイ２と共に引き出される。微小量
ｄは、用紙セット時の用紙の撓みを考慮し、用紙セット
性が損なわれない程度の値に設定される。Further, in the present embodiment, as shown in FIGS. 5 and 7, the position of the end portion 17a of the protruding plate portion 17 on the front side of the apparatus is set to the setting area R of the sheet placed on the tray. A minute amount d is projected to the paper side (front side) from the inner edge. As a result, the jammed paper has a further gap r1.
Also, it easily enters the space r2, is caught by the protruding portion 15, and is pulled out together with the paper feed tray 2. The minute amount d is set to a value that does not impair the paper setting property in consideration of the bending of the paper when the paper is set.
【００３０】このように突き出し部１５が用紙セット領
域に微小量ｄだけ単に突出させただけでは、用紙セット
の仕方によっては用紙を破損する虞がある。そこで、図
７に示すように、用紙セット領域Ｒへ微小量ｄ突出して
いる突き出し板部１７の先端部（前端部）１７ａを下側
（底板６側）に曲げて傾斜させる。このように突き出し
板部１７の先端部１７ａを底板６側に曲げて傾斜させる
と、用紙セット時に前記先端部１７ａがガイドとなって
用紙Ｐを底板６方向に導くことができ、用紙Ｐの破損を
防止することが可能となる。また、突き出し板部１７の
奥側端部（後端部）１７ｂも下側に曲げて傾斜させれ
ば、給紙トレイ２の脱着時に下側に曲げた部分がガイド
となって装置本体１及び上部の給紙トレイ２との衝突を
回避し、もしくは緩衝し、給紙トレイ２や装置本体１の
破損を防止することができる。As described above, if the protruding portion 15 simply protrudes into the paper setting area by a minute amount d, the paper may be damaged depending on how the paper is set. Therefore, as shown in FIG. 7, the leading end portion (front end portion) 17a of the protruding plate portion 17 projecting a minute amount d into the paper setting area R is bent and inclined to the lower side (bottom plate 6 side). When the tip portion 17a of the protruding plate portion 17 is bent and inclined toward the bottom plate 6 side in this manner, the tip portion 17a serves as a guide to guide the paper P toward the bottom plate 6 when the paper is set, and the paper P is damaged. Can be prevented. In addition, if the rear end portion (rear end portion) 17b of the protruding plate portion 17 is also bent and tilted downward, the portion bent downward when the paper feed tray 2 is attached or detached serves as a guide and the apparatus main body 1 and The collision with the upper paper feed tray 2 can be avoided or buffered, and the damage of the paper feed tray 2 and the apparatus main body 1 can be prevented.
【００３１】なお、本実施形態の給紙装置はフィードロ
ーラ１２とリバースローラ１３とからなるフリクション
ローラを使用したものを例示しているが、フリクション
バッドなどの他の方式の給紙機構を有する給紙装置ある
いは画像形成装置に適用することができることは言うま
でもない。また、本実施形態では、突き出し部１５を奥
側のサイドフェンス３と一体に構成しているが、別体に
構成してもよい。さらに、本実施形態では、本発明の給
紙装置を画像形成装置に一体的に装備した構成例を示し
たが、画像形成装置とは別体に給紙装置を設けても良
く、本発明の要旨を逸脱しない範囲で変更を加え得るこ
とはいうまでもない。Although the sheet feeding device of this embodiment uses the friction roller composed of the feed roller 12 and the reverse roller 13, the sheet feeding device has another type of sheet feeding mechanism such as friction pad. It goes without saying that it can be applied to a paper apparatus or an image forming apparatus. Further, in the present embodiment, the protruding portion 15 is formed integrally with the back side fence 3, but it may be formed separately. Furthermore, in the present embodiment, an example of the configuration in which the sheet feeding device of the present invention is integrally provided in the image forming apparatus is shown, but the sheet feeding device may be provided separately from the image forming apparatus. It goes without saying that changes can be made without departing from the spirit of the invention.
【００３２】＜第２の実施形態＞以下、本発明の第２の
実施形態について説明する。図９ないし図１２は本発明
の第２の実施形態に係る給紙装置を説明するためのもの
で、図９は給紙装置の平面図、図１０は図７におけるII
−II線断面図、図１１は第２の突き出し部の要部正面
図、図１２は動作を示す斜視図である。なお、以下の説
明において、前述の第１の実施形態と同等な各部には同
一の参照符号を付し、重複する説明は適宜省略する。<Second Embodiment> The second embodiment of the present invention will be described below. 9 to 12 are for explaining a sheet feeding device according to a second embodiment of the present invention. FIG. 9 is a plan view of the sheet feeding device, and FIG. 10 is a II in FIG.
-II sectional drawing, FIG. 11 is a principal part front view of a 2nd protrusion part, FIG. 12 is a perspective view which shows operation | movement. In the following description, the same parts as those in the first embodiment described above are designated by the same reference numerals, and redundant description will be omitted as appropriate.
【００３３】この第２の実施形態に係る給紙装置は、図
９及び図１０に示すようにサイドフェンス３の突き出し
部１５（以下、第１の突き出し部と称す）より用紙搬送
方向（矢印Ｘ方向）上流側すなわち用紙後端側に第２の
突き出し部１８を設けたことを特徴としている。この第
２の突き出し部１８は、用紙Ｐの載置範囲よりも給紙ト
レイ２の引き出し方向奥側（反矢印Ｙ方向）に位置する
突き出し板部２０と、サイドフェンス３に突き出し板部
２０を連結する結合部１９と、突き出し板部２０から用
紙Ｐの搬送方向Ｘ下流側へ突出する凸部２１とから構成
され、この凸部２１の下部にあたるサイドフェンス３部
分は切り欠かれている。In the sheet feeding device according to the second embodiment, as shown in FIGS. 9 and 10, the paper feeding direction (arrow X) from the protruding portion 15 of the side fence 3 (hereinafter referred to as the first protruding portion). Direction) The second protruding portion 18 is provided on the upstream side, that is, on the trailing edge side of the sheet. The second protruding portion 18 has the protruding plate portion 20 located on the far side (the direction opposite to the arrow Y) in the drawing direction of the paper feed tray 2 with respect to the placement range of the paper P, and the protruding plate portion 20 on the side fence 3. It is composed of a connecting portion 19 to be connected and a convex portion 21 protruding from the protruding plate portion 20 to the downstream side in the transport direction X of the paper P, and the side fence 3 portion below the convex portion 21 is cut out.
【００３４】第２の突き出し部１８の下側におけるサイ
ドフェンス３の上縁部分の高さは他の部分に比べて低く
設定されており、図１１に示すように突き出し板部２０
とサイドフェンス３との間に隙間ｒ３が形成され、これ
によって突き出し板部２０とサイドフェンス３の上面と
の間に用紙端部を係合させることができる空隙が形成さ
れることになる。更に、サイドフェンス３の上縁部分に
対する突き出し板部１７，２０の高さｈは、これら突き
出し板部１７，２０が、装置本体１及び上側に位置する
他の給紙トレイ２と干渉しないような寸法に設定されて
いる。その他、特に説明しない各部は前述の第１の実施
形態と同等に構成されている。The height of the upper edge portion of the side fence 3 below the second protruding portion 18 is set lower than the other portions, and as shown in FIG. 11, the protruding plate portion 20 is provided.
A gap r3 is formed between the side fence 3 and the side fence 3, and as a result, a gap is formed between the protruding plate portion 20 and the upper surface of the side fence 3 so that the end portion of the sheet can be engaged. Further, the height h of the protruding plate portions 17 and 20 with respect to the upper edge portion of the side fence 3 is set so that the protruding plate portions 17 and 20 do not interfere with the apparatus main body 1 and other sheet feeding trays 2 located on the upper side. It is set to dimensions. In addition, each unit that is not particularly described has the same configuration as that of the first embodiment described above.
【００３５】複写装置１などの画像形成装置では、用紙
Ｐの送出時に紙詰まり（ジャム）が生じた場合、ジャム
状態が悪化することを防ぐために、前述のように給紙部
の駆動を瞬時に停止させる。次いで、複写機本体１ある
いは給紙装置本体２の縦搬送路２ａを開放して、ジャム
紙Ｐ’を処理することになるが、ジャム紙Ｐ’の先端部
分がフィードローラ１２付近で止まってしまった場合
は、縦搬送経路の開放では対処できないので、給紙トレ
イ２を引き出すことになる。このようなジャム紙Ｐ’に
対して、Ａ３、Ｂ４、Ａ４縦などの大サイズの用紙Ｐの
ように用紙Ｐが底板６の範囲外にある場合には、底板６
が上昇する際に用紙Ｐが撓むため、給紙トレイ２の引き
出し方向にある程度の弾性力が生じる。これにより、前
記のサイズのジャム紙Ｐ’が給紙トレイ２の引き出しに
伴って、サイドフェンス３に突き当たっても、図４に示
すように大きく撓むことはない。そのため、ジャム紙
Ｐ’の縁部は、第１の突き出し部１５に引っ掛かり、図
６に示す隙間ｒ１及び図７に示す空間ｒ２からなる空隙
部に入り込んで、給紙トレイ２とともに装置本体１の外
部に同時に引き出される。しかし、ジャム紙Ｐ’が、Ａ
４横、Ｂ５横などである場合は、底板６が上昇した際
に、用紙Ｐが搬送面に対してフラットなので、ジャム紙
Ｐ’が奥側のサイドフェンス３に突き当たったときに、
図４に示すように大きく撓みやすく、給紙トレイ２に用
紙Ｐが満載されているとき、あるいは満載状態から１０
０枚程度消費した程度の積載量では、第１の突き出し部
１５に対するジャム紙Ｐ’の縁部の引っ掛かりが不充分
となることに起因して、ジャム紙Ｐ’の縁部が隙間ｒ１
及び空間ｒ２に入り込まずに、図１２に示すように第１
の突き出し部１５を乗り越えてしまうことがある。In the image forming apparatus such as the copying machine 1, when a paper jam (jam) occurs when the paper P is sent out, in order to prevent the jammed state from deteriorating, the driving of the paper feeding portion is instantaneously performed as described above. Stop. Then, the vertical conveyance path 2a of the copying machine main body 1 or the paper feeding device main body 2 is opened to process the jammed paper P ', but the leading end of the jammed paper P'stops near the feed roller 12. In such a case, it cannot be dealt with by opening the vertical transport path, so the paper feed tray 2 is pulled out. When the paper P is out of the range of the bottom plate 6 such as a large size paper P of A3, B4, A4 portrait or the like with respect to the jammed paper P ′, the bottom plate 6
Since the paper P is bent when the paper is raised, some elastic force is generated in the drawing direction of the paper feed tray 2. As a result, even if the jammed paper P ′ of the above size hits the side fence 3 as the paper feed tray 2 is pulled out, it does not largely bend as shown in FIG. 4. Therefore, the edge of the jammed paper P ′ is caught by the first projecting portion 15, enters the gap formed by the gap r1 shown in FIG. 6 and the space r2 shown in FIG. It is pulled out to the outside at the same time. However, the jam paper P'is
In the case of 4 landscapes, B5 landscapes, etc., when the bottom plate 6 rises, the paper P is flat with respect to the transport surface, so when the jammed paper P ′ hits the back side fence 3,
As shown in FIG. 4, it is easily bent, and when the paper P is fully loaded in the paper feed tray 2, or 10
With a stacking amount of about 0 sheets consumed, the edge of the jammed paper P ′ is not sufficiently caught by the first protruding portion 15, and the edge of the jammed paper P ′ has a gap r1.
And without entering the space r2, as shown in FIG.
It may get over the protruding portion 15 of.
【００３６】このように、ジャム紙Ｐ’の搬送方向Ｘに
対して下流寄り部分が第１の突き出し部１５を乗り越え
ようとすると、当該ジャム紙Ｐ’の搬送方向Ｘの上流寄
り部分の縁部が第２の突き出し部１８に引っ掛かり、図
１１に示す隙間ｒ３に入り込む。これによって、ジャム
紙Ｐ’を給紙トレイ２とともに、複写装置１ａあるいは
給紙装置１ｂの外部に同時に引き出すことができる。ま
た、突き出し板部２０に、用紙Ｐの搬送方向Ｘの下流側
へ突出した凸部２１を設けているので、隙間ｒ３に入り
込む前記のジャム紙Ｐ’を、第２の突き出し部１８に確
実に引っ掛けることができる。As described above, when the downstream portion of the jammed paper P'with respect to the transport direction X tries to get over the first protrusion 15, the edge portion of the jammed paper P'with the upstream side of the jammed paper P'in the transport direction X. Catches on the second protrusion 18 and enters the gap r3 shown in FIG. As a result, the jammed paper P ′ can be pulled out together with the paper feed tray 2 to the outside of the copying apparatus 1a or the paper feed apparatus 1b. Further, since the protruding plate portion 20 is provided with the convex portion 21 that protrudes to the downstream side in the transport direction X of the paper P, the jammed paper P ′ that enters the gap r3 is surely transferred to the second protruding portion 18. It can be hooked.
【００３７】更に、第２の突き出し部１８の下側におけ
るサイドフェンス３を切り欠いて隙間ｒ３（空隙）を形
成するとともに、サイドフェンス３の高さを他の部分よ
りも低くしているので、隙間ｒ３を大きくすることがで
き、ジャム紙Ｐ’が第２の突き出し部１８に引っ掛かり
やすくなる。これに加えて、第２の突き出し部１８は、
給紙トレイ２の用紙Ｐ積載範囲よりも奥側に位置してい
るので、用紙Ｐを給紙トレイ２に載置（セット）すると
きに、用紙Ｐが第２の突き出し部１８に衝突せず、用紙
Ｐへの加傷を回避できる。Further, since the side fence 3 on the lower side of the second protruding portion 18 is cut out to form a gap r3 (gap), the height of the side fence 3 is made lower than the other portions. The gap r3 can be increased, and the jammed paper P ′ can be easily caught by the second protruding portion 18. In addition to this, the second protrusion 18 is
Since the paper P is located on the back side of the paper P stacking range of the paper feed tray 2, the paper P does not collide with the second protrusion 18 when the paper P is placed (set) on the paper feed tray 2. It is possible to avoid damage to the paper P.
【００３８】なお、第２の突き出し部１８は、給紙トレ
イ２に載置する種々の用紙Ｐのうちの最小サイズのもの
の中央付近に位置させるようにすることが、第２の突き
出し部１８へのジャム紙Ｐ’の引っ掛かりを確実にする
うえで重要である。It should be noted that the second projecting portion 18 may be located near the center of the smallest size one of the various types of paper P placed on the paper feed tray 2. This is important for ensuring that the jammed paper P ′ is caught.
【００３９】その他、特に説明しない各部は前述の第１
の実施形態と同等に構成され、同等に機能する。In addition, each part not particularly explained is the same as the first part described above.
Is configured and functions in the same manner as the embodiment of FIG.
【００４０】[0040]
【発明の効果】以上のように本発明によれば、給紙トレ
イの引き出し方向奥側の規制部材の用紙搬送方向下流側
の端部に用紙搬送方向下流側に突出するように係合部材
を固設したので、用紙がジャムして給紙トレイを引き出
したときに用紙の撓みが少ない位置で係合部材が用紙端
部に係合し、給紙トレイの引き出し動作に伴って確実に
用紙を引き出すことが可能となり、用紙ジャム時に用紙
が装置本体内に残ることがないようにすることができ
る。As described above, according to the present invention, the engaging member is provided at the end of the regulating member on the far side in the sheet feeding tray with respect to the pulling direction in the downstream side in the sheet conveying direction so as to project to the downstream side in the sheet conveying direction. Since it is fixed, the engaging member engages with the edge of the paper at a position where the paper does not bend when the paper is jammed and the paper feed tray is pulled out, and the paper is reliably pulled out as the paper is pulled out. It is possible to pull out the sheet, and it is possible to prevent the sheet from remaining in the apparatus body when the sheet is jammed.
【００４１】また、本発明によれば、係合部材の先端側
に少なくとも平面状の部分を有し、その下面が給紙トレ
イセット時に最上位の用紙の上面に接触しない最小限の
間隔離間した位置に前記係合部材を設けたので、高さ方
向の寸法を最小限に抑えた上で係合部材の機能を発揮さ
せることができる。Further, according to the present invention, the engaging member has at least a planar portion on the tip end side, and the lower surface thereof is separated by the minimum distance so as not to contact the upper surface of the uppermost sheet at the time of setting the sheet feeding tray. Since the engaging member is provided at the position, the function of the engaging member can be exerted while minimizing the dimension in the height direction.
【００４２】また、本発明によれば、係合部材と規制部
材の端部との間に用紙の端縁を挟み込む空隙部を設けた
ので、用紙端部と係合部材との係合がより確実に行え、
用紙を容易に捕捉できる。Further, according to the present invention, since the space for sandwiching the edge of the sheet is provided between the engaging member and the end of the regulating member, the engagement between the edge of the sheet and the engaging member is further improved. Can be done reliably,
Paper can be easily captured.
【００４３】また、本発明によれば、係合部材の先端部
を微小量突出させたとき、前記係合部材の用紙集積部側
の先端部を給紙トレイの底板に近接するように傾斜させ
ているので、捕捉性が向上するとともに、給紙トレイ内
に用紙をセットする際に用紙が破損する可能性を最小限
にすることができ、ユーザの操作性の向上を図ることが
できる。Further, according to the present invention, when the tip of the engaging member is projected by a small amount, the tip of the engaging member on the sheet stacking side is inclined so as to be close to the bottom plate of the sheet feeding tray. Therefore, the catching property is improved, and the possibility that the paper is damaged when setting the paper in the paper feed tray can be minimized, and the operability for the user can be improved.
【００４４】さらに、本発明によれば、係合部材の用紙
搬送方向上流側の給紙トレイの引き出し方向奥側の規制
部材に、規制部材との間に所定の空隙を備えた第２の係
合部材を設けたので、規制部材の端部に設けた係合部材
によって用紙の捕捉がうまく行われなかった場合に、第
２の係合部材によって用紙搬送方向上流側で用紙端部を
捕捉することができ、残紙処理能力を更に高めることが
可能となる。Further, according to the present invention, the second engaging member is provided with a predetermined gap between the restricting member on the upstream side of the engaging member in the sheet conveying direction and on the rear side in the drawing direction of the paper feed tray. Since the combination member is provided, when the paper is not successfully captured by the engagement member provided at the end of the regulation member, the paper end is captured by the second engagement member on the upstream side in the paper conveyance direction. Therefore, it is possible to further improve the remaining paper processing capacity.
【図１】本発明の第１の実施形態に係る給紙装置を備え
た画像形成装置の概略構成を示す図である。FIG. 1 is a diagram illustrating a schematic configuration of an image forming apparatus including a sheet feeding device according to a first embodiment of the present invention.
【図２】本発明の第１の実施形態に係る給紙装置の給紙
トレイ部分を示す平面図である。FIG. 2 is a plan view showing a sheet feeding tray portion of the sheet feeding device according to the first embodiment of the present invention.
【図３】図２のＩ−Ｉ線断面図である。3 is a cross-sectional view taken along the line I-I of FIG.
【図４】図２のII−II線断面図である。FIG. 4 is a sectional view taken along the line II-II in FIG.
【図５】図２のIII−III線断面図である。5 is a sectional view taken along line III-III in FIG.
【図６】図２のＭ部を拡大して示す図である。FIG. 6 is an enlarged view showing an M portion of FIG.
【図７】図５のＮ部を拡大して示す図である。FIG. 7 is an enlarged view of a portion N of FIG.
【図８】本発明の第１の実施形態に係る給紙装置の給紙
トレイ部を用紙ジャム時に引き出したときの状態を示す
斜視図である。FIG. 8 is a perspective view showing a state in which the paper feed tray unit of the paper feed device according to the first embodiment of the present invention is pulled out at the time of paper jam.
【図９】第２の第２の実施形態に係る給紙装置の給紙ト
レイ部分を示す平面図である。FIG. 9 is a plan view showing a sheet feeding tray portion of a sheet feeding device according to a second second embodiment.
【図１０】図９のIV−IV線断面図である。10 is a sectional view taken along line IV-IV of FIG.
【図１１】図１０のＬ部を拡大して示す図である。FIG. 11 is an enlarged view of an L portion of FIG.
【図１２】本発明の第１の実施形態に係る給紙装置の給
紙トレイ部を用紙ジャム時に引き出したときの状態の一
例を示す斜視図である。FIG. 12 is a perspective view showing an example of a state in which the paper feed tray unit of the paper feed device according to the first embodiment of the present invention is pulled out during a paper jam.
【図１３】従来の給紙装置の態様を示す斜視図である。FIG. 13 is a perspective view showing an aspect of a conventional paper feeding device.
１ 複写装置 １ａ 装置本体 １ｂ 給紙装置 １ｉ 縦搬送部 ２ 給紙トレイ ３，４ サイドフェンス ５ エンドフェンス、 ６ 底板 ６ａ 拡幅部 １５ 突き出し部（第１の係合部材） １６ 結合部 １７ 突き出し板部 １７ａ 突き出し板部の下面 １８ 突き出し部（第２の係合部材） １９ 結合部 ２０ 突き出し板部 ｒ１，ｒ３ 隙間 ｒ２ 空間 1 Copier 1a Device body 1b Paper feeder 1i Vertical transport section 2 paper tray 3,4 Side fence 5 end fences, 6 Bottom plate 6a widening part 15 Projection part (first engaging member) 16 connection 17 Projection plate part 17a Lower surface of protruding plate 18 Projection part (second engaging member) 19 connection 20 Projection plate part r1, r3 gap r2 space
Claims (11)
支持された給紙トレイと、該給紙トレイ上の用紙を給紙
トレイの引き出し方向と直交する方向へ給紙する給紙手
段と、前記給紙トレイ上の用紙の用紙搬送方向に直交す
る方向の端縁の位置を規制する規制部材と、前記給紙ト
レイ引き出し時にジャムした用紙を給紙トレイとともに
引き出すための係合部材と、を備えた給紙装置におい
て、 前記係合部材が、前記給紙トレイの引き出し方向奥側の
規制部材の用紙搬送方向下流側の端部に、用紙搬送方向
下流側に突出するように固設されていることを特徴とす
る給紙装置。1. A paper feed tray supported so as to be pulled out forward from the front of the apparatus main body, a paper feed means for feeding paper on the paper feed tray in a direction orthogonal to the paper feed tray withdrawing direction, A regulation member for regulating the position of the edge of the paper on the paper feed tray in the direction orthogonal to the paper transport direction, and an engagement member for drawing out the jammed paper together with the paper feed tray when the paper feed tray is drawn out. In the sheet feeding device, the engaging member is fixed to the end of the regulating member on the far side in the drawing direction of the sheet feeding tray on the downstream side in the sheet conveying direction so as to project to the downstream side in the sheet conveying direction. A paper feeding device characterized by the above.
状の部分を有し、その下面が給紙トレイセット時に最上
位の用紙の上面に接触しない最小限の間隔離間した位置
に設けられていることを特徴とする請求項１記載の給紙
装置。2. The engaging member has at least a planar portion at its tip end side, and its lower surface is provided at a position separated by a minimum distance so as not to contact the upper surface of the uppermost sheet at the time of setting a sheet feeding tray. The sheet feeding device according to claim 1, wherein the sheet feeding device is provided.
間に用紙の端縁を挟み込む空隙部が設けられていること
を特徴とする請求項１または２記載の給紙装置。3. The sheet feeding device according to claim 1, wherein a gap is provided between the engaging member and the end of the regulation member to sandwich the edge of the sheet.
する面から給紙トレイの引き出し方向に対して後退した
部分を含むことを特徴とする請求項３記載の給紙装置。4. The sheet feeding device according to claim 3, wherein the gap portion includes a portion retracted from a surface of the regulating member with which the sheet abuts in the drawing direction of the sheet feeding tray.
積部側の端部が前記規制部材から前記用紙集積部側に微
小量突出していることを特徴とする請求項１ないし３の
いずれか１項に記載の給紙装置。5. The end portion of the engaging member on the paper stacking portion side of the paper feed tray projects a small amount from the regulating member toward the paper stacking portion side. 2. The paper feeding device according to item 1.
トレイの底板に近接するように傾斜していることを特徴
とする請求項５記載の給紙装置。6. The paper feeding device according to claim 5, wherein the leading end of the end on the paper stacking portion side is inclined so as to come close to the bottom plate of the paper feeding tray.
記給紙トレイの引き出し方向奥側の規制部材に、前記規
制部材との間に所定の空隙を備えた第２の係合部材を設
けたことを特徴とする請求項１ないし６のいずれか１項
に記載の給紙装置。7. A second engaging member provided with a predetermined gap between the restricting member and a restricting member on the far side in the drawing direction of the paper feeding tray, which is upstream of the engaging member in the sheet conveying direction. The sheet feeding device according to claim 1, wherein the sheet feeding device is provided.
成されていることを特徴とする請求項７記載の給紙装
置。8. The sheet feeding device according to claim 7, wherein the gap is formed by cutting out the regulation member.
側に突出部が形成されていることを特徴とする請求項７
記載の給紙装置。9. A protrusion is formed on the downstream side of the second engaging member in the sheet conveying direction.
The paper feeder described.
載置される用紙のうちの最小サイズの用紙の中央付近に
位置するように設けられていることを特徴とする請求項
７記載の給紙装置。10. The second engagement member is provided so as to be located near the center of the smallest size sheet of the sheets placed on the sheet feed tray. The paper feeder described.
記載の給紙装置と、 記録媒体に可視画像を形成する画像形成手段と、を含ん
でなる画像形成装置。11. An image forming apparatus comprising: the sheet feeding device according to claim 1; and an image forming unit that forms a visible image on a recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002145141A JP3973969B2 (en) | 2001-06-07 | 2002-05-20 | Paper feeding device and image forming apparatus |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-172860 | 2001-06-07 | ||
| JP2001172860 | 2001-06-07 | ||
| JP2001395345 | 2001-12-26 | ||
| JP2001-395345 | 2001-12-26 | ||
| JP2002145141A JP3973969B2 (en) | 2001-06-07 | 2002-05-20 | Paper feeding device and image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003255636A true JP2003255636A (en) | 2003-09-10 |
| JP3973969B2 JP3973969B2 (en) | 2007-09-12 |
Family
ID=28678673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002145141A Expired - Fee Related JP3973969B2 (en) | 2001-06-07 | 2002-05-20 | Paper feeding device and image forming apparatus |
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| Country | Link |
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| JP (1) | JP3973969B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007168910A (en) * | 2005-12-19 | 2007-07-05 | Kyocera Mita Corp | Paper feeder, and image forming device with the paper feeder applied thereto |
| KR100867386B1 (en) | 2007-06-29 | 2008-11-06 | (주) 인텍플러스 | System for vision inspection of semiconductor device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7338951B2 (en) * | 2018-01-29 | 2023-09-05 | キヤノンファインテックニスカ株式会社 | Paper feeder |
-
2002
- 2002-05-20 JP JP2002145141A patent/JP3973969B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007168910A (en) * | 2005-12-19 | 2007-07-05 | Kyocera Mita Corp | Paper feeder, and image forming device with the paper feeder applied thereto |
| KR100867386B1 (en) | 2007-06-29 | 2008-11-06 | (주) 인텍플러스 | System for vision inspection of semiconductor device |
| WO2009005222A1 (en) * | 2007-06-29 | 2009-01-08 | Intekplus Co., Ltd | Vision inspection system for semiconductor devices |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3973969B2 (en) | 2007-09-12 |
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