JP2008273635A - Paper feeder and image forming device - Google Patents

Paper feeder and image forming device Download PDF

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JP2008273635A
JP2008273635A JP2007115541A JP2007115541A JP2008273635A JP 2008273635 A JP2008273635 A JP 2008273635A JP 2007115541 A JP2007115541 A JP 2007115541A JP 2007115541 A JP2007115541 A JP 2007115541A JP 2008273635 A JP2008273635 A JP 2008273635A
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paper
extension guide
image forming
holding member
sheet
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Mitsunori Sakamoto
阪本光紀
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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 prevent the generation of warping at a paper rear end portion of loading paper lower portion even if long paper is left on a manually feeding tray, and the generation of abnormal image at image forming caused by difference of surface resistance due to the humidification of the paper, by holding an extension guide pulled out at a stable position, and stabilizing a paper holding member equipped on the extension guide. <P>SOLUTION: The paper feeder has the manually feeding tray provided on an image forming device main body housing so as to open/close. In the paper feeder provided with the extension guide which can be stored in a free end portion side of the manually feeding tray, the paper holding member attached/detached to/from the manually feeding tray is installed on the extension guide pulled out, and a rib extending along the extension guide is formed on a side facing the extension guide of the paper holding member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明はプリンタ、複写機、ファックス、スキャナー等、画像記録装置に給紙する手差しトレイ、特に手差しトレイの補助ホルダに関するものである。   The present invention relates to a manual feed tray that feeds an image recording apparatus such as a printer, a copier, a fax machine, a scanner, and the like, and more particularly to an auxiliary holder for the manual feed tray.

定型サイズの用紙を積載した給紙装置乃至給紙トレイの他に、画像形成装置の装置本体側面に手差しトレイを設けて、この手差しトレイに積載したシートを装置本体に設けた給紙ローラにより一枚ずつ給紙することが周知である。手差しトレイは、給紙方向に垂直な方向、所謂幅方向にスライド可能なサイドフェンスを有して複数の用紙サイズに対応できる利点を有するものの、装置本体に開閉可能に構成されているが故に、シートの長さ方向(給紙方向)に関しては比較的短くなっている。そのため、長いシートを給紙トレイに載置可能にするために、給紙トレイに回動可能に収容できるブレード状の補助テーブルを取り付ける構成が提案され実用化されている。   In addition to a paper feeder or paper tray loaded with standard size paper, a manual feed tray is provided on the side of the main body of the image forming apparatus, and sheets stacked on the manual feed tray are fed by a paper feed roller provided on the main body. It is well known to feed sheets one by one. Although the manual feed tray has a side fence that is slidable in a direction perpendicular to the paper feeding direction, so-called width direction, and has an advantage that it can cope with a plurality of paper sizes, it is configured to be openable and closable on the apparatus main body. The sheet length direction (paper feeding direction) is relatively short. For this reason, a configuration in which a blade-like auxiliary table that can be rotatably accommodated in the paper feed tray is attached and put into practical use so that a long sheet can be placed on the paper feed tray.

また特許文献1では、手差しトレイの幅方向両側に着脱自在に指示された回動支点と、これら回動支点から給紙方向下流側に所定距離離反する位置で手差しトレイの下面に当接するストッパと、手差しトレイの上面よりも給紙方向上流側に延出して手差しトレイの上面に載置される用紙の後端部を支えるシート受け部とを具備する補助ホルダが提案されている。   Further, in Patent Document 1, a rotation fulcrum instructed to be detachable on both sides in the width direction of the manual feed tray, and a stopper that contacts the lower surface of the manual feed tray at a position away from the rotation fulcrum by a predetermined distance downstream in the paper feeding direction. There has been proposed an auxiliary holder including a sheet receiving portion that extends to the upstream side in the paper feeding direction from the upper surface of the manual feed tray and supports the rear end portion of the paper placed on the upper surface of the manual feed tray.

この特許文献1の補助ホルダやブレード状の補助テーブルは、長尺の用紙を載置することができるが、本来の手差しトレイのガイドフェンスに相当する部片を有さないため、小型化した手差しトレイのサイドフェンスによりガイドできる寸法が限られ、長尺の用紙を給紙する場合に幅方向両端のガイドが不十分となり、スキューが発生し易くなっていた。そこで、特許文献2において、載置された用紙の幅方向両端をガイドする手差しトレイ上の一対のサイドフェンスに取り付けられ、給紙方向と逆方向へ伸長自在に摺動する一対の延長サイドフェンスが提案された。   The auxiliary holder and the blade-shaped auxiliary table of Patent Document 1 can place a long sheet of paper, but do not have a part corresponding to the guide fence of the original manual feed tray, so a reduced manual feed The size that can be guided by the side fence of the tray is limited, and when feeding long paper, the guides at both ends in the width direction are insufficient, and skew is likely to occur. Therefore, in Patent Document 2, there is a pair of extended side fences attached to a pair of side fences on a manual feed tray that guides both ends in the width direction of the loaded paper, and slides freely in the direction opposite to the paper feeding direction. was suggested.

特開平10−329988号公報Japanese Patent Laid-Open No. 10-329988 特開2002−362787号公報JP 2002-362787 A

特許文献2の延長ガイドフェンスは、長尺用紙であってもスキューの発生を防止できるが、そもそも手差しトレイは特殊サイズの用紙に画像形成する際に、その都度利用することが前提で、手差しトレイ上に用紙を置きっ放しにすることが想定されていない。しかしながら、そのような長尺の用紙、特に腰の弱い薄紙を複数枚セットし、そのまま放置しておくと、積載用紙下部の用紙後端部のシワや用紙の調湿による表面抵抗の違いのために、画像形成の際に異常画像が発生した。本発明は、長尺の用紙を手差しトレイ上に放置しておいても積載用紙下部の用紙後端部にたわみが発生したり、また用紙の調湿による表面抵抗の違いによって、画像形成の際に異常画像が発生する事態を防止しながら、付属部材の安定した装着を実現することを課題とする。   The extension guide fence of Patent Document 2 can prevent skew even for a long sheet, but the manual feed tray is supposed to be used whenever an image is formed on a special size sheet. It is not supposed to leave the paper on top. However, if multiple sheets of such long paper, especially thin paper with low stiffness, are set and left as they are, there will be differences in surface resistance due to wrinkles at the bottom edge of the loaded paper and humidity control of the paper. In addition, an abnormal image occurred during image formation. In the present invention, even when a long sheet is left on the manual feed tray, deflection occurs at the rear end of the sheet at the bottom of the stacked sheet, and the difference in surface resistance due to the humidity adjustment of the sheet causes the image formation. It is an object of the present invention to realize a stable mounting of an accessory member while preventing a situation in which an abnormal image is generated.

上記課題は、本発明にしたがって、画像形成装置本体筐体に開閉自在に設けられた手差しトレイを有する給紙装置であって、上記手差しトレイの自由端部側に収納可能な延長ガイドが設けられた給紙装置において、手差しトレイに着脱自在な用紙保持部材を、引き出した延長ガイド上に設置し、当該用紙保持部材の延長ガイドに面する側に、延長ガイドに沿ったリブを形成することで、解決される。   An object of the present invention is to provide a sheet feeding device having a manual feed tray that can be freely opened and closed in an image forming apparatus main body housing according to the present invention, wherein an extension guide that can be stored on the free end side of the manual feed tray is provided. In the paper feeding device, a paper holding member that is detachable from the manual feed tray is installed on the extended guide that is pulled out, and a rib that extends along the extension guide is formed on the side facing the extension guide of the paper holding member. Solved.

延長ガイドが収納されている場合には当該延長ガイドに干渉し、延長ガイドが引き出された場合には延長ガイドに干渉しない第2のリブを形成するのが、好適である。また用紙保持部材が半透明に形成されていれば、好都合である。   It is preferable to form a second rib that interferes with the extension guide when the extension guide is stored and does not interfere with the extension guide when the extension guide is pulled out. In addition, it is convenient if the sheet holding member is formed to be translucent.

請求項1に係る発明によれば、引き出した延長ガイドを安定した位置に保持でき、その上に装着した用紙保持部材も安定して、手差しトレイ上に載置された用紙の投影面をカバーするので、長尺の用紙を手差しトレイ上に放置しておいても積載用紙下部の用紙後端部にたわみが発生したり、また用紙の調湿による表面抵抗の違いによって、転写不良を起こしたり、画像形成の際に異常画像が発生する事態を防止できる。   According to the first aspect of the present invention, the extended guide pulled out can be held in a stable position, and the paper holding member mounted thereon can also stably cover the projection surface of the paper placed on the manual feed tray. Therefore, even if a long sheet is left on the manual feed tray, the rear end of the sheet at the bottom of the loaded sheet may bend, or the transfer resistance may be deteriorated due to the difference in surface resistance due to the humidity control of the sheet. It is possible to prevent an abnormal image from occurring during image formation.

延長ガイドが収納されている場合には当該延長ガイドに干渉し、延長ガイドが引き出された場合には延長ガイドに干渉しない第2のリブを形成することで、延長ガイドが引き出された状態でのみ用紙保持部材を取り付けることができるようになるので、用紙保持部材の取り付け性が確実に安定する。用紙保持部材が半透明であることで、延長ガイドの状態を用紙保持部材の上からでも目視で確認でき、用紙保持部材を容易にセットできる。   When the extension guide is stored, it interferes with the extension guide, and when the extension guide is pulled out, a second rib that does not interfere with the extension guide is formed, so that the extension guide is pulled out only. Since the paper holding member can be attached, the attachment of the paper holding member is reliably stabilized. Since the paper holding member is translucent, the state of the extension guide can be visually confirmed even from above the paper holding member, and the paper holding member can be easily set.

図1において、カラー画像形成装置の略中央に画像形成装部1が配置され、この画像形成部1のすぐ下方に給紙部2が配置されている。給紙部2は各段に給紙カセット21を備えている。必要に応じて別の給紙装置22を画像毛製装置本体側方に増設することができる。画像形成部1の上方には、原稿を読み取る読取部3が配設されている。画像形成部1の用紙搬送方向下流側(図で見て左側)に排紙収納部として形成された排紙トレイ4があり、画像形成された記録媒体(以下、用紙という)が排紙収納される。   In FIG. 1, an image forming apparatus 1 is disposed substantially at the center of the color image forming apparatus, and a paper feeding unit 2 is disposed immediately below the image forming unit 1. The paper feed unit 2 includes a paper feed cassette 21 at each stage. If necessary, another sheet feeding device 22 can be added to the side of the image hair manufacturing apparatus main body. Above the image forming unit 1, a reading unit 3 for reading a document is disposed. A paper discharge tray 4 formed as a paper discharge storage unit is provided downstream of the image forming unit 1 in the paper conveyance direction (left side in the figure), and an image-formed recording medium (hereinafter referred to as paper) is discharged and stored. The

画像形成部1では、ベルト状の中間転写ベルト5の上面に、4つの作像部6が配置されている。各々の作像部6では、ドラム状の感光体61の周囲に、感光体表面に帯電処理を行う帯電装置62、感光体表面に露光されて形成された静電潜像を可視化する現像装置63、及び、感光体上に残留するトナーを除去回収するクリーニング装置64が配置されており、作像プロセスとしては、中間転写ベルト5が、回転して1つのカラー画像を形成する。   In the image forming unit 1, four image forming units 6 are arranged on the upper surface of a belt-like intermediate transfer belt 5. In each of the image forming units 6, a charging device 62 that performs charging processing on the surface of the photoconductor, and a developing device 63 that visualizes the electrostatic latent image formed by exposure on the surface of the photoconductor, around the drum-shaped photoconductor 61. A cleaning device 64 that removes and collects toner remaining on the photosensitive member is disposed. As an image forming process, the intermediate transfer belt 5 rotates to form one color image.

作像部6の上方には、画像情報を色別に分解して各感光体表面にレーザ光で照射する共通の露光装置7がある。最初に、イエロー(Y)の作像部で、イエロー(Y)のトナーを現像し、中間転写ベルト5へ転写する。次に、マゼンタ(M)の作像部で、マゼンタのトナーを現像し、次いで、シアン(C)の作像部で、シアンのトナーを現像し、最後に、ブラック(BK)のトナーを現像して、それぞれ中間転写ベルト5へ転写する。   Above the image forming unit 6 is a common exposure device 7 that separates image information by color and irradiates the surface of each photoreceptor with laser light. First, yellow (Y) toner is developed and transferred to the intermediate transfer belt 5 in the yellow (Y) image forming section. Next, the magenta (M) image forming unit develops magenta toner, then the cyan (C) image forming unit develops cyan toner, and finally black (BK) toner. Then, the image is transferred to the intermediate transfer belt 5.

中間転写ベルト5上で現像された4色のトナー像を用紙に転写する転写装置51、転写後に中間転写ベルト表面に残留するトナーを除去回収する中間転写クリーニング装置52がそれぞれ中間転写ベルト5の下位置に配置されている。   A transfer device 51 that transfers toner images of four colors developed on the intermediate transfer belt 5 to a sheet, and an intermediate transfer cleaning device 52 that removes and collects toner remaining on the surface of the intermediate transfer belt after the transfer are provided below the intermediate transfer belt 5. Placed in position.

トナー像を得た用紙上のトナーを定着処理する定着装置8が画像形成部1と排紙トレイ4の間に配置されている。定着装置8を通過した用紙は排紙ローラ41により排紙トレイ4に排紙収納される。両面印刷時には、表面定着後に排紙されず、分岐部92にて分岐され、両面装置93を経由して、用紙が反転され、レジストローラ23で用紙スキューが補正され、裏面画像形成動作に至る。   A fixing device 8 for fixing the toner on the paper on which the toner image has been obtained is disposed between the image forming unit 1 and the paper discharge tray 4. The sheet that has passed through the fixing device 8 is discharged and stored in the discharge tray 4 by the discharge roller 41. At the time of double-sided printing, the paper is not discharged after the front surface fixing, is branched by the branching unit 92, the paper is reversed through the double-sided device 93, the paper skew is corrected by the registration roller 23, and the back side image forming operation is performed.

給紙部2においては、給紙カセット22に未使用の用紙が収容されており、回動可能に支持された底板が最上の用紙を、ピックアップローラが当接可能な位置まで上昇する。給紙ローラの回転により、最上紙は給紙カセットから送り出され、レジストローラ23へと搬送される。レジストローラ23は用紙搬送を一時止め、感光体表面のトナー像と用紙の先端との位置関係が所定の位置になるよう、タイミングをとって回転が再開するよう、制御される。   In the paper feed unit 2, unused paper is stored in the paper feed cassette 22, and the bottom plate that is rotatably supported raises the uppermost paper to a position where the pickup roller can contact. Due to the rotation of the paper feed roller, the uppermost paper is fed from the paper feed cassette and conveyed to the registration roller 23. The registration roller 23 is controlled so as to resume rotation at a timing so that the conveyance of the paper is temporarily stopped and the positional relationship between the toner image on the surface of the photosensitive member and the leading edge of the paper becomes a predetermined position.

読取部3では、コンタクトガラス31に載置された原稿(不図示)の読み取り走査を行うために、原稿照明用光源とミラーより成る読取走行体32が往復移動する。この読取走行体32により走査された画像情報は、レンズ34の後方に設置されたCCD35に画像信号として読み込まれる。この読み込まれた画像信号は、デジタル化され画像処理される。画像処理された信号に基づいて、露光装置7内のレーザダイオードLD(不図示)の発光により感光体61の表面に静電潜像が形成される。LDからの光信号は、公知のポリゴンミラーやレンズを介して感光体に至る。読取部3の上方に、原稿を自動的にコンタクトガラス上に搬送する自動原稿搬送装置36に取り付けられている。   In the reading unit 3, in order to read and scan a document (not shown) placed on the contact glass 31, a reading traveling body 32 including a document illumination light source and a mirror reciprocates. The image information scanned by the reading traveling body 32 is read as an image signal into the CCD 35 installed behind the lens 34. The read image signal is digitized and subjected to image processing. Based on the image-processed signal, an electrostatic latent image is formed on the surface of the photoreceptor 61 by light emission of a laser diode LD (not shown) in the exposure device 7. The optical signal from the LD reaches the photosensitive member via a known polygon mirror or lens. Above the reading unit 3, it is attached to an automatic document feeder 36 that automatically conveys the document onto the contact glass.

本実施例のカラー画像形成装置は、上述した如く原稿を走査して読み取り、デジタル化して用紙に複写する、所謂デジタルカラー複写機としての機能の他に、不図示の制御装置により原稿の画像情報を遠隔地と授受するファクシミリの機能、コンピューターが扱う画像情報を用紙上に印刷する所謂プリンタの機能を有する多機能の画像形成装置である。   The color image forming apparatus of this embodiment scans and reads a document as described above, digitizes it, and copies it onto a sheet. In addition to the function as a so-called digital color copying machine, the image information of the document is controlled by a control device (not shown). Is a multifunctional image forming apparatus having a function of a facsimile that exchanges information with a remote place and a function of a so-called printer that prints image information handled by a computer on paper.

以上のような構成の画像形成装置において、図1で見て右側面に、開閉自在な手差しトレイ101が設けられている。この手差しトレイ101上には、それ自体公知のように、用紙幅方向にスライド可能なサイドフェンス102,103が装着されている(図2,3)。また手差しトレイ101の自由端部には、折りたたみ式の延長ガイド104,105が装着されており、手差しトレイ101を多少超える長さの用紙の場合には、図3に示すように、延長ガイド104,105を引き出して、用紙を支える。しかしながら、この延長ガイド104,105だけでは、用紙を手差しトレイ上に放置した場合、積載用紙の端部P1,P2が自重によりたわんでしまい、定着の際にシワを生じて異常画像を発生する恐れがある。そこで、本発明では、手差しトレイ101から延在する用紙保持部材106が延長ガイド104,105上に着脱自在に装着されるようになっている。サイドフェンス102,103によってカバーされる用紙幅全域を載置できる用紙保持部材106には、給紙方向に沿った4本のリブ106a〜106dが延長ガイド104,105に面した側に形成されている(図4では、用紙積載面に4本の溝として現れている)。2本のリブ106a,106b或いは106c,106dが対となり、その谷間に延長ガイド104,105が位置して、用紙保持部材106の用紙トレイ101への装着が安定する。リブは例えば2mmの高さで設けられている。   In the image forming apparatus configured as described above, an openable and closable manual feed tray 101 is provided on the right side as viewed in FIG. On the manual feed tray 101, side fences 102 and 103 that are slidable in the paper width direction are mounted as is known per se (FIGS. 2 and 3). In addition, folding extension guides 104 and 105 are attached to the free end portion of the manual feed tray 101. In the case of a sheet slightly longer than the manual feed tray 101, as shown in FIG. , 105 is pulled out to support the paper. However, with the extension guides 104 and 105 alone, when the paper is left on the manual feed tray, the end portions P1 and P2 of the stacked paper may bend due to their own weight, which may cause wrinkles during fixing and generate an abnormal image. There is. Therefore, in the present invention, the sheet holding member 106 extending from the manual feed tray 101 is detachably mounted on the extension guides 104 and 105. On the sheet holding member 106 that can place the entire sheet width covered by the side fences 102 and 103, four ribs 106 a to 106 d along the sheet feeding direction are formed on the side facing the extension guides 104 and 105. (In FIG. 4, four grooves appear on the sheet stacking surface). The two ribs 106a and 106b or 106c and 106d are paired, and the extension guides 104 and 105 are positioned between the ribs 106a and 106d, so that the mounting of the paper holding member 106 to the paper tray 101 is stabilized. The rib is provided with a height of 2 mm, for example.

また用紙保持部材106の延長ガイドに面した側の中央には、リブ106と平行に凸部107が形成されている。この凸部107は、延長ガイド104,105が引き出された場合にのみ、用紙保持部材106が手差しトレイ101に装着できるようにするためのものである。したがって、凸部107の給紙方向上流端は、用紙保持部材106を手差しトレイ101に装着した際に、延長ガイド104,105の収納位置に食い込むように設定されており(図6)、これによって延長ガイド104,105が用紙トレイ101に収納されている状態では、延長ガイド104,105が凸部107に干渉して用紙保持部材106の装着を阻害する。凸部107の高さは、延長ガイド104,105の厚み程度以下である。   A convex portion 107 is formed in parallel with the rib 106 at the center of the sheet holding member 106 facing the extension guide. The convex portion 107 is provided so that the sheet holding member 106 can be attached to the manual feed tray 101 only when the extension guides 104 and 105 are pulled out. Therefore, the upstream end of the convex portion 107 in the paper feeding direction is set so as to bite into the storage position of the extension guides 104 and 105 when the paper holding member 106 is mounted on the manual feed tray 101 (FIG. 6). In a state where the extension guides 104 and 105 are stored in the paper tray 101, the extension guides 104 and 105 interfere with the convex portion 107 and obstruct the mounting of the paper holding member 106. The height of the convex portion 107 is less than or equal to the thickness of the extension guides 104 and 105.

用紙保持部材106は、半透明な材質で構成されていてもよい。   The paper holding member 106 may be made of a translucent material.

画像形成装置の概略構成図である。1 is a schematic configuration diagram of an image forming apparatus. 開閉可能な手差しトレイを示す図である。It is a figure which shows the manual feed tray which can be opened and closed. 手差しトレイの延長ガイドを引き出して用紙を積載した様子を示す図である。FIG. 10 is a diagram illustrating a state where sheets are stacked by pulling out an extension guide of a manual feed tray. 用紙保持部材を示す図で、(a)は手差しトレイに装着した様子を、(b)は用紙保持部材のみの例である。FIGS. 4A and 4B are diagrams illustrating a sheet holding member, in which FIG. 4A illustrates an example in which the sheet is mounted on a manual feed tray, and FIG. 延長ガイドを引き出した状態で用紙保持部材を手差しトレイに装着することを説明する図である。FIG. 10 is a diagram illustrating that the sheet holding member is mounted on the manual feed tray with the extension guide pulled out. 延長ガイドを引き出さないと用紙保持部材を装着できないことを説明する図である。FIG. 6 is a diagram illustrating that a sheet holding member cannot be attached unless an extension guide is pulled out.

符号の説明Explanation of symbols

101 手差しトレイ
104,105 延長ガイド
106 用紙保持部材
106a〜106d リブ
107 凸部
101 Manual feed tray 104, 105 Extension guide 106 Paper holding member 106a to 106d Rib 107 Convex

Claims (4)

画像形成装置本体筐体に開閉自在に設けられた手差しトレイを有する給紙装置であって、上記手差しトレイの自由端部側に収納可能な延長ガイドが設けられた給紙装置において、手差しトレイに着脱自在な用紙保持部材を、引き出した延長ガイド上に設置し、当該用紙保持部材の延長ガイドに面する側に、延長ガイドに沿ったリブが形成されていることを特徴とする給紙装置。   A sheet feeding device having a manual feed tray that is provided in an openable / closable manner in an image forming apparatus main body housing, wherein the paper feed device is provided with an extension guide that can be stored on the free end side of the manual feed tray. A sheet feeding device, wherein a detachable sheet holding member is installed on a drawn extension guide, and a rib is formed along the extension guide on a side of the sheet holding member facing the extension guide. 延長ガイドが収納されている場合には当該延長ガイドに干渉し、延長ガイドが引き出された場合には延長ガイドに干渉しない第2のリブが形成されていることを特徴とする請求項1に記載の給紙装置。   The second rib is formed so as to interfere with the extension guide when the extension guide is housed and not interfere with the extension guide when the extension guide is pulled out. Paper feeder. 用紙保持部材が半透明に形成されていることを特徴とする請求項1又は2に記載の給紙装置。   The sheet feeding device according to claim 1, wherein the sheet holding member is formed to be translucent. 請求項1〜3のいずれか一項に記載の給紙装置と、給紙された用紙に画像形成を行う画像形成部とを有する画像形成装置。   An image forming apparatus comprising: the paper feeding device according to claim 1; and an image forming unit that forms an image on the fed paper.
JP2007115541A 2007-04-25 2007-04-25 Paper feeder and image forming device Pending JP2008273635A (en)

Priority Applications (1)

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JP2007115541A JP2008273635A (en) 2007-04-25 2007-04-25 Paper feeder and image forming device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015189573A (en) * 2014-03-28 2015-11-02 ブラザー工業株式会社 Paper feeding device
US9376279B2 (en) 2014-10-06 2016-06-28 Kyocera Document Solutions Inc. Sheet feeding device and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015189573A (en) * 2014-03-28 2015-11-02 ブラザー工業株式会社 Paper feeding device
US9376279B2 (en) 2014-10-06 2016-06-28 Kyocera Document Solutions Inc. Sheet feeding device and image forming apparatus

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