JPH05257346A - Paper feeding guide device - Google Patents
Paper feeding guide deviceInfo
- Publication number
- JPH05257346A JPH05257346A JP4057962A JP5796292A JPH05257346A JP H05257346 A JPH05257346 A JP H05257346A JP 4057962 A JP4057962 A JP 4057962A JP 5796292 A JP5796292 A JP 5796292A JP H05257346 A JPH05257346 A JP H05257346A
- Authority
- JP
- Japan
- Prior art keywords
- guide member
- feeding guide
- paper feed
- paper feeding
- feed guide
- 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.)
- Pending
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機やイメージスキャ
ナー等の画像形成装置に装着される感光体ドラムに記録
紙を給送する給紙ガイド装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed guide device for feeding recording paper to a photosensitive drum mounted in an image forming apparatus such as a copying machine or an image scanner.
【０００２】[0002]
【従来の技術】一般に複写機やイメージスキャナー等の
電子写真式画像形成装置は原稿を載置するプラテンとそ
の下方に往復動する原稿照射ランプと反射ミラー及び固
定された投影レンズと反射ミラーとで構成される走査光
学系と帯電極によって所定の電位がチャージされてエン
ドレスに回転する感光体ドラムと、前記走査光学系によ
って前記感光体ドラム面上に形成された静電潜像にトナ
ーを付与して現像する現像器と、該感光体ドラム面の下
方に向けて搬送される転写材である記録用紙面上にトナ
ー画像を転写する転写極と、分離極及び除電極と、前記
記録用紙面上に転写されたトナー画像を定着する定着器
と、転写したのちの前記感光体面上に残留するトナーや
紙粉などを除去するクリーニング装置とによって構成さ
れている。最近普及型の複写機などでは例えば帯電極や
感光体ドラム、クリーニング装置等をユニット化したカ
ートリッジとこのカートリッジに分離、結合可能な現像
器カートリッジとを１つに結合したプロセスカートリッ
ジを画像形成装置に着脱自在に装着するようにしてかな
りコンパクトにできている。2. Description of the Related Art Generally, an electrophotographic image forming apparatus such as a copying machine or an image scanner comprises a platen on which a document is placed, a document irradiation lamp which reciprocates below the platen, a reflection mirror, and a fixed projection lens and a reflection mirror. A photosensitive drum that is endlessly rotated by a scanning optical system and a band electrode that are charged with a predetermined potential, and toner is applied to the electrostatic latent image formed on the surface of the photosensitive drum by the scanning optical system. A developing device for developing the toner image, a transfer electrode for transferring a toner image onto a recording paper surface which is a transfer material conveyed below the surface of the photosensitive drum, a separation electrode and a removing electrode, and the recording paper surface. The fixing device fixes the toner image transferred onto the surface of the photosensitive member, and the cleaning device removes the toner and paper dust remaining on the surface of the photosensitive member after the transfer. In a recent popular type copying machine, for example, a process cartridge in which a cartridge in which a belt electrode, a photosensitive drum, a cleaning device and the like are unitized and a developer cartridge which can be separated and connected to the cartridge are combined into one is used as an image forming apparatus. It's quite compact because it's removable.
【０００３】また、クリーニング装置によって回収され
たトナーはリサイクル装置によって現像器に供給され再
び利用されるようになっている。Further, the toner collected by the cleaning device is supplied to the developing device by the recycling device and is reused.
【０００４】[0004]
【発明が解決しようとする課題】一般に給紙カセットか
ら搬出された記録紙は感光体ドラムの手前に設けられる
タイミングローラと給紙ガイド部材とによって感光体ド
ラム面に正確に搬送して常に良好なトナー画像を転写す
るようにしている。感光体ドラムの長手方向は例えばＢ
４サイズの記録紙の幅方向に画像を記録し得る長さを有
し、給紙ガイド部材も同等の長さを備えている。Generally, the recording paper carried out from the paper feed cassette is accurately conveyed to the surface of the photoconductor drum by a timing roller and a paper feed guide member which are provided in front of the photoconductor drum, and is always in good condition. The toner image is transferred. The longitudinal direction of the photosensitive drum is, for example, B
The four-size recording paper has a length capable of recording an image in the width direction, and the paper feed guide member has the same length.
【０００５】そして記録紙の全域に亘って良好なトナー
画像を転写するためには感光体ドラムの周面と該感光体
ドラム周面に記録紙を進入させる給紙ガイド部材の先端
部との間隔を例えば1.5mm±0.1mm以内の高い精度に保つ
ことが条件の１つとされている。しかしながら給紙ガイ
ド部材やこれを支持する画像形成装置のフレーム及び感
光体ドラムのケーシング等の部品加工や互いの組立を定
められた加工精度内に仕上げるにはそれぞれに長さが長
く面積も大きいため加工歪等の問題もあって大変手間の
かかる作業を要する上に精度上のバラツキは避けられな
い。また感光体ドラムの周面と給紙ガイド部材との位置
が定められた精度に出てないと感光体ドラムに向って進
入する記録紙がばた付いて転写されるトナー画像に乱れ
が生ずる。本発明はこのような問題を解決して感光体ド
ラムに対して給紙ガイド部材を精度よく取付けることの
できる給紙ガイド装置の提供を課題目的とする。In order to transfer a good toner image over the entire area of the recording paper, the distance between the peripheral surface of the photosensitive drum and the leading end of the paper feed guide member that allows the recording paper to enter the peripheral surface of the photosensitive drum. Is one of the conditions to maintain high accuracy within, for example, 1.5 mm ± 0.1 mm. However, in order to process the parts such as the paper feed guide member, the frame of the image forming apparatus supporting the same and the casing of the photoconductor drum, and the mutual assembly within the predetermined processing accuracy, the length is long and the area is large. There is a problem such as processing distortion, which requires a very troublesome work, and inevitably causes variations in accuracy. If the positions of the peripheral surface of the photosensitive drum and the paper feed guide member do not reach the predetermined accuracy, the recording paper that enters toward the photosensitive drum flaps and the transferred toner image is disturbed. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a paper feed guide device capable of accurately attaching a paper feed guide member to a photosensitive drum.
【０００６】[0006]
【課題を解決するための手段】この目的は第１の搬送手
段でシート収納部から搬出したシートを第２の搬送手段
と給紙ガイド部材とによって感光体ドラムに搬送する画
像形成装置の給紙ガイド装置において、前記給紙ガイド
部材は画像形成装置に設けられる一対の支持部に回動可
能に軸支される２つの支点を有し該支点を基準にシート
の搬送方向に形成される給紙ガイド部材の先端部に感光
体ドラムとの位置決め面を備えた該給紙ガイド部材の前
記支点に一方を長孔としたことを特徴とする給紙ガイド
装置によって達成される。The purpose of this invention is to feed a sheet, which is carried out from the sheet storage section by the first carrying means, to the photosensitive drum by the second carrying means and the paper feed guide member. In the guide device, the paper feed guide member has two fulcrums pivotally supported by a pair of supporting portions provided in the image forming apparatus, and a paper feed formed in the sheet conveying direction with reference to the fulcrums. This is achieved by a paper feed guide device characterized in that one end of the guide member is provided with an elongated hole at the fulcrum of the paper feed guide member having a positioning surface for positioning the photosensitive drum at the tip end portion of the guide member.
【０００７】[0007]
【実施例】本発明の１実施例を図１の給紙ガイド装置の
構成を示す側面図と図２の給紙ガイド部材の形状を示す
斜視図と図３の画像形成装置の構成を示す側断面図とに
よって説明する。しかし本発明は本実施例に限定される
ものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is a side view showing the structure of the paper feed guide device of FIG. 1, a perspective view showing the shape of the paper feed guide member of FIG. 2, and a side showing the structure of the image forming device of FIG. A cross-sectional view will be described. However, the present invention is not limited to this embodiment.
【０００８】図３に示すように電子写真画像形成装置18
は本体１の上面に原稿Ｍを設置するプラテンガラスＰが
設けられ、本体１内のこのプラテンガラスＰの下方には
走査光学系２が設けられている。走査光学系２は往復動
する原稿照射ランプ２ａ、第１ミラー２ｂ、Ｖ字形を形
成する第２，第３ミラー２ｃおよび固定されたレンズ２
ｄと第４ミラー２ｅとから成る。本体１の内部中央には
感光体ドラム３が矢印方向に回転可能に設けられてお
り、その周辺には、回転方向に沿って感光体３ａを一様
に帯電する帯電極４と、トナー補給装置５によりトナー
が補給され現像スリーブ６ａを内蔵する現像器６と、転
写電極７と、分離電極８と、除電電極９と、クリーニン
グ装置10とが順次配置されている。給紙カセット11，1
1′にはそれぞれサイズの異なる２種類の記録紙が収納
されて本体１にセットされている。12は給紙カセット11
に収納された記録紙を第２供給ローラ13の手前の待機位
置まで給送する第１給紙ローラであり、記録紙の重送を
防止するためにベルトを介して回転されるローラ12ａ，
12ａと停止ローラ（さばきローラともいう）12ｂとによ
り構成されている。13は第１給紙ローラ12により給送さ
れる記録紙を前記待機位置で一旦停止させ、その後感光
体３ａ上の可視像先端と記録紙先端とを転写位置で一致
させるように適切なタイミングで転写位置に向けて再び
給紙する第２給紙ローラ、14は第１給紙ローラ12により
給送された記録紙を第２給紙ローラ13の位置まで案内す
るためのガイド板であり、レバー（図示せず）を操作す
ることによって開閉され、手を入れてジャム紙が取り出
せるようになっている。15は転写後の記録紙を定着位置
まで搬送する搬送装置であり、定着装置16は加熱ローラ
16ａと圧着ローラ16ｂとから成る。17は定着後の記録紙
を本体外部に排紙する排紙ローラである。As shown in FIG. 3, an electrophotographic image forming apparatus 18 is provided.
A platen glass P for placing a document M is provided on the upper surface of the main body 1, and a scanning optical system 2 is provided below the platen glass P in the main body 1. The scanning optical system 2 includes a reciprocating document irradiation lamp 2a, a first mirror 2b, second and third mirrors 2c forming a V shape, and a fixed lens 2.
d and the fourth mirror 2e. A photosensitive drum 3 is rotatably provided in the direction of the arrow at the center of the inside of the main body 1, and a belt electrode 4 for uniformly charging the photosensitive body 3a along the rotation direction is provided around the photosensitive drum 3, and a toner replenishing device. 5, a developing device 6 in which the toner is replenished with toner and a developing sleeve 6a is built in, a transfer electrode 7, a separation electrode 8, a charge eliminating electrode 9, and a cleaning device 10 are sequentially arranged. Paper cassette 11,1
Two types of recording papers having different sizes are stored in 1'and set in the main body 1. 12 is a paper cassette 11
Is a first paper feed roller that feeds the recording paper stored in to a standby position before the second supply roller 13, and is a roller 12a that is rotated via a belt to prevent double feeding of the recording paper.
12a and a stop roller (also referred to as a separating roller) 12b. Reference numeral 13 is an appropriate timing so that the recording paper fed by the first paper feed roller 12 is temporarily stopped at the standby position, and then the front end of the visible image on the photoconductor 3a and the front end of the recording paper are aligned at the transfer position. The second paper feed roller 14 that feeds paper again toward the transfer position at 14 is a guide plate for guiding the recording paper fed by the first paper feed roller 12 to the position of the second paper feed roller 13, It is opened and closed by operating a lever (not shown) so that the jammed paper can be taken out by inserting a hand. Reference numeral 15 is a conveying device that conveys the recording paper after transfer to a fixing position, and the fixing device 16 is a heating roller.
16a and pressure roller 16b. Reference numeral 17 denotes a paper discharge roller that discharges the recording paper after fixing to the outside of the main body.
【０００９】そして図に示すように帯電極４と感光体ド
ラム３とクリーニング装置10とを内蔵する第１のカート
リッジ20と、現像器６とトナー補給装置５とがユニット
化された第２のカートリッジ30との２つに分割されて互
に分離、結合可能に組合わされるプロセスカートリッジ
40が画像形成装置18に着脱自在に装着されるようになっ
ている。As shown in the figure, a first cartridge 20 containing the belt electrode 4, the photosensitive drum 3, and the cleaning device 10, a second cartridge in which the developing device 6 and the toner replenishing device 5 are unitized. Process cartridge which is divided into two parts such as 30 so that they can be separated from each other and combined.
40 is detachably attached to the image forming apparatus 18.
【００１０】上記装置において、コピーボタンを操作す
ると、プラテンガラスＰ上の原稿Ｍは走査光学系２によ
り露光走査され、感光体ドラム３の感光体３ａ上に原稿
Ｍの静電潜像が形成される。この静電潜像は現像器６に
より可視像とされ、この可視像は本体１の給紙カセット
11，11′のいずれかから給送された記録紙に転写電極７
によって転写される。転写後記録紙は分離電極８により
感光体３ａから分離され、搬送装置15により定着装置16
に搬送され、そこで定着され排紙ローラ17により排紙さ
れる。このようにして記録紙面上に所要のトナー画像が
つぎつぎと記録されるようになっている。When the copy button is operated in the above apparatus, the original M on the platen glass P is exposed and scanned by the scanning optical system 2, and an electrostatic latent image of the original M is formed on the photoconductor 3a of the photoconductor drum 3. It This electrostatic latent image is made into a visible image by the developing device 6, and this visible image is the paper feeding cassette of the main body 1.
Transfer electrode 7 is applied to recording paper fed from either 11 or 11 '.
Transcribed by After the transfer, the recording paper is separated from the photoconductor 3a by the separation electrode 8 and is fixed by the conveyance device 15 to the fixing device 16
The sheet is conveyed to the sheet, is fixed there, and is ejected by the sheet ejection roller 17. In this way, desired toner images are successively recorded on the recording paper surface.
【００１１】本発明の感光体ドラム周面に記録紙を進入
させる給紙ガイド装置を次のように構成した。The paper feed guide device for admitting the recording paper to the peripheral surface of the photosensitive drum of the present invention is constructed as follows.
【００１２】図１に示すように給紙ガイド装置21は第２
給紙ローラ対13とこの左側に隣接して記録紙を感光体ド
ラム３の周面に向けて給紙進入させる給紙ガイド部材22
と、この給紙ガイド部材22を回動可能に支持する本体１
に設けられる前側支持部25と奥側支持部26と、奥側支持
部26に設けられる支軸26ａと前側支持部25、前側折曲部
22ｃ双方に取付けられる支軸ねじ23と、給紙ガイド部材
22を時計方向に付勢して感光体ドラム３のドラムケース
33の基準面に当接させる付勢ばね24とから構成されてい
る。そして給紙ガイド部材22は図１及び図２に示すよう
にプレス加工された板状の部材でその上面部は長手方向
（図１の紙面垂直方向）に亘って平坦な給紙ガイド面22
ａを有しその左側先端部22ｂは図に示すように所定の角
度に折曲げられその上面はドラムケース33の長手方向両
側端部に設けられる基準面33ａに当接するようなってい
る。As shown in FIG. 1, the paper feed guide device 21 is a second
Adjacent to the left side of the pair of paper feed rollers 13, a paper feed guide member 22 for advancing the recording paper toward the peripheral surface of the photosensitive drum 3
And a main body 1 that rotatably supports the paper feed guide member 22.
Front support portion 25 and rear support portion 26 provided on the rear side, support shaft 26a and front support portion 25 provided on the rear support portion 26, front bent portion
22c Support shaft screw 23 mounted on both sides, and paper feed guide member
22 is urged clockwise and the drum case of the photoconductor drum 3
And a biasing spring 24 that abuts against the reference surface 33. The paper feed guide member 22 is a plate-shaped member that has been pressed as shown in FIGS. 1 and 2, and the top surface of the paper feed guide member 22 is flat along the longitudinal direction (the direction perpendicular to the paper surface of FIG. 1).
As shown in the drawing, the left end 22b of the drum case 33 is bent at a predetermined angle, and its upper surface is in contact with reference surfaces 33a provided at both longitudinal ends of the drum case 33.
【００１３】そして給紙ガイド部材22の長手方向両側端
は前後対称に下方へ直角に折曲げられ前側折曲げ部22ｃ
の所定の位置には支軸ねじ23がねじ込まれるねじ孔22ｅ
が設けられ、一方奥側折曲げ部22ｄにはねじ孔22ｅと対
称の位置に長孔22ｆが設けられている。そして各折曲げ
部22ｃ，22ｄの左下端部には突起22ｈが対称に形成され
図１に示すように付勢ばね24が各突起22ｈに嵌め合わさ
れるようになっている。従って付勢ばね24の上端部は給
紙ガイド部材22にその下端面は本体１のフレームにそれ
ぞれ当接して付勢するようになっている。そして画像形
成装置18の本体１のフレーム１ａの長手方向（紙面垂直
方向）には給紙ガイド部材22を支持する前側支持部25と
奥側支持部26とが直角に立上げられている。そして前側
支持部25の所定の位置には孔25ａが設けられ支軸ねじ23
の段付部が嵌合するようになっている。また奥側支持部
26には孔25ａと対称の位置に前側支持部25の方向に突出
する支軸26ａが一体的に形成されこの支軸26ａが給紙ガ
イド部材22の長孔22ｆと嵌め合わされるようになってい
る。なお各前側、奥側の支持部25，26は本体１のフレー
ムと一体的に立上げられていてもよいし、或は合成樹脂
によって成型される基板に各前側、奥側の支持部25，26
及び支軸26ａを含めて一体的に成型した部材を本体１の
フレーム１ａに取付けるようにしてもさしつかえない。Both ends of the paper feed guide member 22 in the longitudinal direction are symmetrically bent forward and downward at a right angle, and a front bent portion 22c is formed.
The screw hole 22e into which the spindle screw 23 is screwed in
On the other hand, an elongated hole 22f is provided at a position symmetrical to the screw hole 22e on the back side bent portion 22d. A protrusion 22h is symmetrically formed at the lower left end of each bent portion 22c, 22d, and a biasing spring 24 is fitted to each protrusion 22h as shown in FIG. Therefore, the upper end of the urging spring 24 contacts the paper feed guide member 22 and the lower end of the urging spring 24 contacts the frame of the main body 1 to urge the same. In the longitudinal direction of the frame 1a of the main body 1 of the image forming apparatus 18 (perpendicular to the paper surface), a front support portion 25 and a back support portion 26 that support the paper feed guide member 22 are erected at right angles. A hole 25a is provided at a predetermined position of the front side support portion 25, and the support screw 23
The stepped part of is fitted. Also the back side support
A support shaft 26a projecting toward the front side support portion 25 is integrally formed with the hole 26a at a position symmetrical to the hole 25a, and the support shaft 26a is fitted into the long hole 22f of the paper feed guide member 22. There is. The front and rear supporting portions 25 and 26 may be integrally formed with the frame of the main body 1, or the front and rear supporting portions 25 and 26 may be formed on a substrate molded of synthetic resin. 26
Also, it does not matter if the integrally molded member including the support shaft 26a is attached to the frame 1a of the main body 1.
【００１４】このように形成される給紙ガイド部材22は
奥側支持部26の支軸26ａに長孔22ｆを嵌め合わせたのち
前側折曲げ部22ｃを前側支持部25の内法に位置して支軸
ねじ23の段付部のフラット部分を孔25ａに嵌合すると共
に給紙ガイド部材22の前側折曲げ部22ｃのねじ孔22ｅに
セットすることによって給紙ガイド部材22は各突起22ｈ
に取付けられた付勢ばね24の弾性力を介してその先端部
22ｂの上面がドラムケース33の基準面33ａに所定の押圧
力で押接する。なお長孔22ｆは丸孔で25ａを長孔に置き
替えてもさしつかえない。The sheet feeding guide member 22 formed in this manner has the front side bent portion 22c positioned inside the front side support portion 25 after the long hole 22f is fitted to the support shaft 26a of the back side support portion 26. By fitting the flat portion of the stepped portion of the support shaft screw 23 into the hole 25a and setting it in the screw hole 22e of the front side bent portion 22c of the paper feed guide member 22, the paper feed guide member 22 is provided with each projection 22h.
Via the elastic force of the biasing spring 24 attached to
The upper surface of 22b is pressed against the reference surface 33a of the drum case 33 with a predetermined pressing force. The long hole 22f is a round hole and 25a may be replaced with a long hole.
【００１５】このようにして感光体ドラム３の周面と給
紙ガイド部材22の先端部22ｂとの間隔Ｄ即ち記録紙が感
光体ドラム３に向って進入する間隔が設定される。な
お、説明を省略したが給紙ガイド部材22と対向する上側
には所定の間隔を設けて上側ガイド部材が設けられ給紙
ガイド部材22と上側ガイド部材との間を記録紙が通過し
て感光体ドラム３に進入するようになっている。In this way, the distance D between the peripheral surface of the photosensitive drum 3 and the front end portion 22b of the paper feed guide member 22, that is, the distance at which the recording paper enters the photosensitive drum 3 is set. Although not described, an upper guide member is provided on the upper side facing the paper feed guide member 22 at a predetermined interval, and the recording paper passes between the paper feed guide member 22 and the upper guide member to expose the light. It is designed to enter the body drum 3.
【００１６】そして例えば給紙ガイド部材22の先端部22
ｂの前側と奥側とが変形している場合はこの変形量に応
じて長孔22ｆが支軸26ａをスライドして誤差を吸収し先
端部22ｂの上面はドラムケース33の基準面に等しく押接
し感光体ドラム３の周面と先端部22ｂとの長手方向全域
に亘って所定の間隔Ｄが確保される。Then, for example, the front end portion 22 of the paper feed guide member 22.
When the front side and the back side of b are deformed, the long hole 22f slides the support shaft 26a according to the deformation amount to absorb the error, and the upper surface of the tip end 22b is pressed equally to the reference surface of the drum case 33. A predetermined distance D is secured over the entire area in the longitudinal direction between the peripheral surface of the photosensitive drum 3 and the tip portion 22b.
【００１７】また、給紙ガイド部材22を支持する各支持
部25，26の寸法が変化しているような場合でも長孔22ｆ
によって修正されることは勿論である。このように極め
て簡単に感光体ドラム３の周面に対し給紙ガイド部材22
が長手方向全域に亘って定められた間隔を設けて正確に
取付けられるので組立作業が大変容易になると共に第２
給紙ローラ13から矢印方向に搬送される記録紙はスムー
ズに感光体ドラム３の周面に進入して良好なトナー画像
が転写される。なお、長孔22ｆは給紙ガイド部材22の奥
側折曲部22ｄに限らず前側折曲げ部22ｃのねじ孔22ｅと
位置を変更して設けてもさしつかえないがこれに伴って
支軸26ａは前側支持部25に、孔25ａは奥側支持部26に位
置が変更される。Further, even when the dimensions of the supporting portions 25 and 26 for supporting the paper feed guide member 22 are changed, the slot 22f is formed.
Of course, it will be modified by. As described above, the paper feed guide member 22 is very easily attached to the peripheral surface of the photosensitive drum 3.
Since it can be accurately mounted with a predetermined interval provided over the entire longitudinal direction, the assembling work becomes very easy and the second
The recording paper conveyed from the paper feed roller 13 in the direction of the arrow smoothly enters the peripheral surface of the photosensitive drum 3 and a good toner image is transferred. The elongated hole 22f is not limited to the back side bent portion 22d of the paper feed guide member 22 and may be provided with a position different from that of the screw hole 22e of the front side bent portion 22c. The position of the hole 25a is changed to the back side support portion 26 in the front side support portion 25.
【００１８】また長孔22ｆの方向は給紙ガイド部材22や
他の部材の変形特性に対応して適宜に設定されてよい。The direction of the long hole 22f may be appropriately set in accordance with the deformation characteristics of the paper feed guide member 22 and other members.
【００１９】[0019]
【発明の効果】本発明は以上説明した給紙ガイド装置に
よって仮に給紙ガイド部材が変形していても感光体ドラ
ムに対する定められた間隔を正確にしかも極めて容易に
確保できるようになったので部品加工や組立が大変楽に
なると共に記録紙が安定して感光体ドラムに向けて進入
するので常に良好なトナー画像が転写される。According to the present invention, since the paper feed guide device described above can accurately and extremely easily secure the predetermined interval with respect to the photoconductor drum even if the paper feed guide member is deformed. Processing and assembly become very easy and the recording paper stably enters toward the photosensitive drum, so that a good toner image is always transferred.
【図１】本発明の１実施例による給紙ガイド装置の構成
を示す側面図。FIG. 1 is a side view showing the configuration of a paper feed guide device according to an embodiment of the present invention.
【図２】本発明の１実施例による給紙ガイド部材の形状
と取付状態を示す斜視図。FIG. 2 is a perspective view showing a shape and a mounting state of a paper feed guide member according to an embodiment of the present invention.
【図３】画像形成装置の構成を示す側断面図。FIG. 3 is a side sectional view showing the configuration of the image forming apparatus.
３ 感光体ドラム 13 第２給紙ローラ対 18 画像形成装置 21 給紙ガイド装置 22 給紙ガイド部材 22ｂ 先端部 22ｃ 前側折曲げ部 22ｄ 奥側折曲げ部 22ｆ 長孔 23 支軸ねじ 24 付勢ばね 25 前側支持部 26 奥側支持部 26ａ 支軸 33 ドラムケース 3 Photoreceptor Drum 13 Second Paper Feed Roller Pair 18 Image Forming Device 21 Paper Feed Guide Device 22 Paper Feed Guide Member 22b Tip 22c Front Bend 22d Back Bend 22f Long Hole 23 Spindle Screw 24 Energizing Spring 25 Front support 26 Back support 26a Spindle 33 Drum case
Claims (1)
したシートを第２の搬送手段と給紙ガイド部材とによっ
て感光体ドラムに搬送する画像形成装置の給紙ガイド装
置において、前記給紙ガイド部材は画像形成装置に設け
られる一対の支持部に回動可能に軸支される２つの支点
を有し該支点を基準にシートの搬送方向に形成される給
紙ガイド部材の先端部に感光体ドラムとの位置決め面を
備えた該給紙ガイド部材の前記支点に一方を長孔とした
ことを特徴とする給紙ガイド装置。1. A sheet feeding guide device of an image forming apparatus, which conveys a sheet carried out from a sheet storage section by a first conveying means to a photosensitive drum by a second conveying means and a sheet feeding guide member. The guide member has two fulcrums pivotally supported by a pair of supporting portions provided in the image forming apparatus, and is exposed to the leading end of the paper feed guide member formed in the sheet conveying direction with reference to the fulcrums. A sheet feeding guide device, wherein one of the fulcrums of the sheet feeding guide member having a positioning surface with respect to the body drum has an elongated hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057962A JPH05257346A (en) | 1992-03-16 | 1992-03-16 | Paper feeding guide device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057962A JPH05257346A (en) | 1992-03-16 | 1992-03-16 | Paper feeding guide device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05257346A true JPH05257346A (en) | 1993-10-08 |
Family
ID=13070642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4057962A Pending JPH05257346A (en) | 1992-03-16 | 1992-03-16 | Paper feeding guide device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05257346A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013047756A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| JP2013047757A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| US9213270B2 (en) | 2011-08-29 | 2015-12-15 | Ricoh Company, Ltd. | Image forming apparatus |
-
1992
- 1992-03-16 JP JP4057962A patent/JPH05257346A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013047756A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| JP2013047757A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| US9213270B2 (en) | 2011-08-29 | 2015-12-15 | Ricoh Company, Ltd. | Image forming apparatus |
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