JP2003321144A - Paper sheet feeder, and image forming device using the same - Google Patents

Paper sheet feeder, and image forming device using the same

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Publication number
JP2003321144A
JP2003321144A JP2002131877A JP2002131877A JP2003321144A JP 2003321144 A JP2003321144 A JP 2003321144A JP 2002131877 A JP2002131877 A JP 2002131877A JP 2002131877 A JP2002131877 A JP 2002131877A JP 2003321144 A JP2003321144 A JP 2003321144A
Authority
JP
Japan
Prior art keywords
guide
recording paper
paper
recording
paper feed
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
Application number
JP2002131877A
Other languages
Japanese (ja)
Inventor
Takayuki Niihara
貴之 新原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2002131877A priority Critical patent/JP2003321144A/en
Publication of JP2003321144A publication Critical patent/JP2003321144A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To prevent an impact noise generated when a rear end of a recording paper sheet fed from a sheet feed tray falls down from an upper face of a recording paper sheet bundle onto a guide member over a corner claw, and a sliding noise from being generated, when the recording paper sheet fed from a paper sheet feeder is fed to be conveyed to an image forming part or the like. <P>SOLUTION: This paper sheet feeder is provided with a paper sheet feed roller 6 for feeding the recording paper sheet by contacting with the uppermost face of the recording paper sheet bundle inside the sheet feed tray 5 and rotating, a conveying route 2 for conveying the recording paper sheet fed by the feed roller, and the guide member 7 provided with a guide upper face 7a positioned between the feed roller and a conveying route inlet to guide the fed recording paper sheet to a pair of conveying rollers, and is constituted to make the rear end of the recording paper sheet fed by the paper sheet feed roller collided with the guide upper face. In the feeder, a cushioning protrusion 31 is arranged at least in one portion of the guide upper face, and the rear end of the recording paper sheet is brought into contact with the cushioning protrusion. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は複写機、プリンタ、
ファクシミリ装置等の画像形成装置に装備されて記録用
紙を画像形成部に給紙する給紙装置の改良に関し、特に
給紙装置から給紙された記録用紙を搬送経路に給紙搬送
する際に、記録用紙を搬送経路に受け渡す箇所において
発生する記録用紙とガイド部材との衝突音、摺動音を防
止して静音化を実現することができる給紙装置、及びそ
れを用いた画像形成装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a printer,
The present invention relates to an improvement of a sheet feeding device that is installed in an image forming apparatus such as a facsimile machine and feeds a recording sheet to an image forming unit, and particularly when feeding a recording sheet fed from a sheet feeding apparatus to a conveying path. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device capable of preventing a collision noise and a sliding noise between a recording sheet and a guide member which are generated at a position where the recording sheet is delivered to a conveyance path, thereby realizing a silent operation, and an image forming apparatus using the same It is a thing.

【0002】[0002]

【従来の技術】複写機、プリンタ、ファクシミリ装置、
印刷機等の画像形成装置は、画像形成部に対して記録用
紙を一枚ずつ自動給紙することにより連続的に画像形成
を行うために、装置本体の内部、或いは外部に給紙装置
を装備している。図6(a)及び(b)は、一般的なコ
ーナー爪方式を用いた給紙装置の概略構成を示す図、及
び要部拡大図である。この給紙装置1は、例えば複写機
等の画像形成装置の下部に配置され、搬送経路2を経
て、上方に位置する画像形成部に向けて一枚ずつ記録用
紙を給送する手段である。この給紙装置1は、装置本体
に対して着脱可能な給紙トレイ5と、装置本体側に設け
た給紙コロ6と、搬送経路2を形成するガイド部材7、
8と、搬送経路2に配置された搬送ローラ対9と、コ
ロ、ローラ類を駆動するモータ等を有する。給紙トレイ
5は、図示しない外ケースと、外ケース内に上下動可能
に支持され上面に記録用紙Pを積載する底板11と、底
板11を上向き付勢する弾性部材12と、底板11とは
別個に上下動可能に支持され且つ底板の上昇時に連動し
て上昇するコーナー爪13と、を有する。給紙コロ6
は、モータにより矢印で示す給紙方向へ回転することに
より、最上部の記録用紙を図面左方に位置する搬送経路
2の下部入り口(搬送ローラ対9)へ送り出す。この
際、コーナー爪13が記録用紙を分離し、記録用紙はコ
ーナー爪を乗り越えて搬送経路2側へ移動する。ガイド
部材7、8は搬送経路2の一部を構成しており、給紙ト
レイ側に位置するガイド部材7はその上面に斜めに傾斜
したガイド上面7aを備え、給紙コロ6により送り出さ
れてきた最上部の記録用紙の先端を搬送ローラ対9のニ
ップ部に案内する。搬送経路2の上部には、レジストロ
ーラ対20が配置されると共に、レジストローラ対20
の手前には、記録用紙をレジストローラ対のニップ部に
導くレジスト導入マイラー15が配置されている。図6
(b)に示すように、給紙コロ6によって搬送された記
録用紙Pの後端がコーナー爪13の上面から落下する
際、記録用紙後端とガイド7のガイド上面7a(特に、
その下部)との衝突によって、瞬発音が発生する。この
音は1枚の記録用紙が搬送される度に発生するため、か
なり耳障りな音となることが多く、環境にやさしい機械
が求められている昨今、問題視されることが多い。
2. Description of the Related Art Copiers, printers, facsimile machines,
An image forming apparatus such as a printing machine is provided with a sheet feeding device inside or outside the apparatus main body in order to continuously form images by automatically feeding recording sheets one by one to an image forming unit. is doing. 6A and 6B are a diagram showing a schematic configuration of a sheet feeding device using a general corner claw method and an enlarged view of a main part. The sheet feeding device 1 is a unit arranged below the image forming apparatus such as a copying machine, and is a unit that feeds the recording sheets one by one toward the image forming unit located above through the conveyance path 2. The sheet feeding device 1 includes a sheet feeding tray 5 that is detachable from the apparatus body, a sheet feeding roller 6 provided on the apparatus body side, and a guide member 7 that forms a conveyance path 2.
8, a pair of transport rollers 9 arranged on the transport path 2, a roller, a motor for driving the rollers, and the like. The paper feed tray 5 includes an outer case (not shown), a bottom plate 11 that is supported in the outer case so as to be vertically movable and has a top surface on which the recording paper P is stacked, an elastic member 12 that biases the bottom plate 11 upward, and the bottom plate 11. And a corner claw 13 that is separately movably supported and that moves up in conjunction with the rise of the bottom plate. Paper feed roller 6
Is rotated by the motor in the paper feeding direction indicated by the arrow to send the uppermost recording sheet to the lower entrance (conveying roller pair 9) of the conveying path 2 located on the left side of the drawing. At this time, the corner claw 13 separates the recording paper, and the recording paper moves over the corner claw and moves to the transport path 2 side. The guide members 7 and 8 form a part of the conveyance path 2, and the guide member 7 located on the side of the paper feed tray has a guide upper surface 7a inclined obliquely on the upper surface thereof, and is fed by the paper feed roller 6. The leading edge of the uppermost recording sheet is guided to the nip portion of the pair of transport rollers 9. The registration roller pair 20 is arranged above the transport path 2, and the registration roller pair 20
A resist introduction mylar 15 that guides the recording sheet to the nip portion of the registration roller pair is arranged in front of the. Figure 6
As shown in (b), when the trailing edge of the recording paper P conveyed by the paper feed roller 6 falls from the upper surface of the corner claw 13, the trailing edge of the recording paper and the guide upper surface 7a of the guide 7 (particularly,
The lower part) causes a sudden sounding. Since this sound is generated every time one recording sheet is conveyed, it is often a jarring sound, and is often regarded as a problem in recent years when an environment-friendly machine is required.

【0003】特開2001−88971には、コーナー
爪方式を用いた給紙装置において、コーナー爪上面から
記録用紙後端がガイド面に落下する際、大きな音が発生
し、耳障りな音になるという欠点を解消するため、コー
ナー爪の一部をガイド部材側へ一体的に延ばしてコーナ
ー爪とガイド部材との間の段差を埋めるように構成する
ことにより、コーナー爪をはずれた用紙後端部がガイド
部材のガイド面に衝突する不具合を解消しているが、ユ
ーザーによる記録用紙のセット性が悪化するという欠点
がある。また、コーナー爪からガイド部材に向けてガイ
ドを突出させた構成を採用するため、周辺部材のレイア
ウト、形状を変更する必要が生じ、生産コスト増を招い
ていた。また、特開2001−88971においては、
搬送ローラ対のニップ部分やガイド部品間などに記録用
紙をガイドする目的でマイラー(樹脂製の撓性板状部
品)を使用しているが、このマイラーの先端のエッジと
記録用紙の摺動音が問題となっている。図6に示したレ
ジスト導入マイラー15も同様な不具合をもたらしてい
る。
Japanese Unexamined Patent Application Publication No. 2001-88971 discloses that, in a sheet feeding device using a corner claw method, when the trailing edge of the recording sheet falls from the upper surface of the corner claw onto the guide surface, a loud noise is generated, which causes an offensive sound. In order to eliminate the drawbacks, a part of the corner claw is integrally extended to the guide member side so as to fill the step between the corner claw and the guide member, so that the trailing edge of the paper that is off the corner claw is Although the problem of colliding with the guide surface of the guide member is solved, there is a drawback that the setting property of the recording paper by the user is deteriorated. Further, since the guide is projected from the corner claws toward the guide member, it is necessary to change the layout and shape of the peripheral members, resulting in an increase in production cost. Further, in Japanese Patent Laid-Open No. 2001-88971,
A mylar (a flexible plate-shaped part made of resin) is used to guide the recording paper between the nip part of the transport roller pair and between the guide parts. The sliding noise between the edge of the mylar and the recording paper is used. Is a problem. The resist-introduced mylar 15 shown in FIG. 6 also causes a similar problem.

【0004】次に、特開平7−315622号公報に
は、速度の異なる搬送ローラ装置間を搬送される用紙に
ループが形成される場合に、用紙のループがガイド板を
叩くことによる騒音の発生を防止するために、ガイド板
として2枚の揺動ガイド板を対向配置し、用紙のループ
からの圧力により揺動ガイド板を退避させるように構成
した用紙搬送装置が開示されている。しかし、この従来
例の構造は、用紙搬送路を挟んで対向配置された2枚の
揺動ガイド板を回動自在に支持するため、設置スペース
を広く確保する必要があり、図6に示した如き限られた
スペースに配置することは困難である。また、部品点数
が増大し、コストアップをもたらすことも明らかであ
る。また、特開平8−59007号公報には、画像形成
部に用紙を送込むレジストローラ対の手前に用紙の搬送
速度を減速させる速度緩和部材を配置することによっ
て、レジストローラ対と用紙先端との当接時に発生する
騒音を防止する給紙装置が開示されている。しかし、こ
の従来例は、用紙先端と搬送ローラ対との衝突による騒
音発生を防止することを目的としており、後述する本発
明とは目的が異なる。また、同公報記載の速度緩和部材
を図6(b)に示した部分に適用しても用紙後端とガイ
ド面との間の衝突、摺動により発生する騒音を緩和する
ことはできない。
Next, in Japanese Patent Application Laid-Open No. 7-315622, when a loop is formed on a sheet conveyed between conveying roller devices having different speeds, noise is generated by the sheet loop hitting a guide plate. In order to prevent this, a sheet conveying device is disclosed in which two swing guide plates are arranged as guide plates so as to face each other, and the swing guide plates are retracted by the pressure from the loop of the sheet. However, since the structure of this conventional example rotatably supports the two rocking guide plates that are arranged opposite to each other with the paper conveyance path in between, it is necessary to secure a wide installation space, and as shown in FIG. It is difficult to place it in such a limited space. It is also clear that the number of parts is increased and the cost is increased. Further, in Japanese Unexamined Patent Publication No. 8-59007, a speed reducing member that reduces the conveyance speed of the sheet is arranged in front of the registration roller pair that feeds the sheet to the image forming unit, so that the registration roller pair and the leading edge of the sheet are separated. A sheet feeding device that prevents noise generated when abutting is disclosed. However, the purpose of this conventional example is to prevent the generation of noise due to the collision between the leading edge of the sheet and the pair of conveying rollers, and the purpose is different from the present invention described later. Further, even if the speed reducing member described in the publication is applied to the portion shown in FIG. 6B, it is not possible to reduce the noise generated by the collision and sliding between the trailing edge of the sheet and the guide surface.

【0005】[0005]

【発明が解決しようとする課題】本発明は上記に鑑みて
なされたものであり、給紙装置から給紙された記録用紙
を画像形成部等に給紙搬送する場合に、給紙トレイから
給紙された記録用紙の後端がコーナー爪を越えてガイド
部材上に落下したときに発生する衝突音、摺動音の発生
を防止することができる給紙装置、及びそれを用いた画
像形成装置を提供することを目的としている。また、搬
送ローラ対、レジストローラ対のニップ部分やガイド部
品間などに記録用紙をガイドする目的でマイラーを使用
している場合に、このマイラーの先端のエッジと記録用
紙との間の摺動音を低減することを他の目的としてい
る。
SUMMARY OF THE INVENTION The present invention has been made in view of the above, and when recording paper fed from a paper feeding device is fed to an image forming unit or the like, it is fed from a paper feeding tray. Paper feeding device capable of preventing collision noise and sliding noise generated when a trailing end of a recording paper which has been printed falls on a guide member beyond a corner claw, and an image forming apparatus using the same Is intended to provide. Also, when using a mylar for the purpose of guiding the recording paper between the nip part of the transport roller pair and the registration roller pair or between the guide parts, the sliding noise between the edge of the tip of the mylar and the recording paper The other purpose is to reduce.

【0006】[0006]

【課題を解決するための手段】上記課題を解決するた
め、請求項1の発明は、記録用紙束を積載した給紙トレ
イと、給紙トレイ内の記録用紙束最上面に接して回転す
ることにより記録用紙を給紙する給紙コロと、給紙コロ
により給紙された記録用紙を搬送する搬送ローラ対を備
えた搬送経路と、給紙コロと搬送ローラ対との間に位置
し給紙された記録用紙を搬送ローラ対にガイドするガイ
ド上面を備えたガイド部材と、を備えた給紙装置であっ
て、給紙コロにより給紙された記録用紙後端部がガイド
上面に衝突する構成を備えたものにおいて、前記ガイド
部材のガイド上面の少なくとも一部に緩衝用突部を配置
し、搬送ローラ対により搬送される記録用紙の後端部を
該緩衝用突部に当接させるように構成したことを特徴と
する。給紙装置において、給紙トレイ上の記録用紙束か
ら最上部の記録用紙を搬送経路に送り出す際に、給紙ト
レイと搬送経路入り口との間の間隙にガイド部材を設け
て記録用紙を搬送経路内にスムーズに導く構成が採用さ
れる。このガイド部材は、記録用紙を搬送経路入り口に
導くためのガイド上面を備えている。このガイド上面
と、給紙トレイ上の記録用紙束の最上面(コーナー爪)
との間に段差がある場合、記録用紙束の最上面から用紙
後端がガイド上面に落下して衝突音を発生させる。この
摺動音は、ガイド上面が硬質の樹脂や金属である場合
や、ガイド上面と用紙後端とが面状に接触する際に最も
大きくなる。この発明では、ガイド上面の適所、即ち、
記録用紙後端部が落下して騒音を発生させる部位に予め
緩衝用突部を接着等により固定しておくことにより、記
録紙後端部とガイド上面との接触部を線状、或いは点状
にすることができ、記録用紙の衝突による瞬発音を低減
することができる。また、この緩衝用突部は板状であっ
てもよいし、所要の面取り加工を施しても良い。また、
緩衝用突部を弾性材料にて構成すれば、緩衝、消音効果
は更に増大する。これによれば、ユーザーの記録用紙セ
ット性を損なうことなく、コーナー爪上面から記録用紙
後端が落下する際の音を緩和することが可能となり、ユ
ーザーに不快感を与えないマシンを提供することができ
る。
In order to solve the above-mentioned problems, the invention of claim 1 is to rotate in contact with a paper feed tray on which a bundle of recording paper is stacked and a topmost surface of the recording paper bundle in the paper feed tray. Is located between the paper feed roller and the feed roller pair, and a feed path that has a feed roller that feeds the print paper by the And a guide member having a guide upper surface for guiding the formed recording sheet to the pair of conveying rollers, wherein a rear end of the recording sheet fed by a sheet feeding roller collides with the upper surface of the guide. A cushioning protrusion is disposed on at least a part of the upper surface of the guide of the guide member, and the rear end of the recording sheet conveyed by the pair of conveying rollers is brought into contact with the cushioning protrusion. It is characterized by being configured. In the sheet feeding device, when the uppermost recording sheet is sent from the bundle of recording sheets on the sheet feeding tray to the conveying path, a guide member is provided in the gap between the sheet feeding tray and the entrance of the conveying path to convey the recording sheet. A structure that smoothly guides inside is adopted. The guide member has a guide upper surface for guiding the recording paper to the entrance of the transport path. The upper surface of this guide and the top surface (corner claw) of the stack of recording paper on the paper tray
If there is a step between the sheet and the sheet, the trailing edge of the sheet falls from the uppermost surface of the recording sheet bundle to the upper surface of the guide and a collision sound is generated. The sliding noise is maximized when the upper surface of the guide is made of a hard resin or metal, or when the upper surface of the guide and the rear end of the sheet are in planar contact. In this invention, the proper place on the upper surface of the guide, that is,
The contact portion between the trailing edge of the recording paper and the upper surface of the guide is linear or dotted by fixing the bumps for cushioning to the area where the trailing edge of the recording paper falls to generate noise. Therefore, it is possible to reduce the instantaneous sound caused by the collision of the recording sheets. Further, the cushioning protrusion may be plate-shaped or may be subjected to a required chamfering process. Also,
If the cushioning protrusion is made of an elastic material, the cushioning and sound deadening effects are further enhanced. According to this, it is possible to mitigate the noise when the trailing edge of the recording paper falls from the upper surface of the corner claw without impairing the user's ability to set the recording paper, and to provide a machine that does not cause user discomfort. You can

【0007】請求項2の発明は、前記緩衝用突部は、弾
性材料から構成されていることを特徴とする。記録用紙
後端部がガイド上面に当接する位置に弾性材料を配置す
ることにより、騒音を大幅に低減できることは明らかで
ある。請求項3の発明は、前記緩衝用突部は、前記ガイ
ド上面の幅方向に沿って所定のピッチで一体的に突設さ
れた複数のリブであることを特徴とする。上記の各発明
においては、ガイド部材と緩衝用突部とが別部品となっ
てしまい、かつ別途弾性材料から成る部品の貼り付け作
業も必要となり、コストがかかってしまうという欠点が
あったが、この発明によれば、ガイド上面に予め一体成
形したリブ状の緩衝用突部を配置したので、コストを低
減しながらも、ガイド上面と記録用紙後端との接触部を
線状とし、記録用紙後端の落下音(瞬発音)を緩和する
ことができる。請求項4の発明は、請求項1、2又は3
において、前記緩衝用突部は少なくともその一部に湾曲
面を有していることを特徴とする。この発明では、少し
でも記録用紙との接触面積を減らす為に、リブ形状に大
きなR部を設けている。このため、コストをかけずに、
記録用紙のセット性に影響を与えることなく、記録用紙
後端の落下音を抑制するという効果をより確実に達成す
ることができる。
The invention of claim 2 is characterized in that the buffering projection is made of an elastic material. It is clear that the noise can be significantly reduced by disposing the elastic material at the position where the trailing edge of the recording paper contacts the upper surface of the guide. According to a third aspect of the present invention, the cushioning protrusion is a plurality of ribs integrally provided at a predetermined pitch along the width direction of the guide upper surface. In each of the above inventions, the guide member and the shock-absorbing protrusion are separate parts, and the work of attaching a separate part made of an elastic material is also required, which has the drawback of increasing the cost. According to the present invention, since the rib-shaped cushioning projections integrally formed in advance are arranged on the upper surface of the guide, the contact portion between the upper surface of the guide and the trailing edge of the recording paper is made linear while the cost is reduced, and the recording paper is It is possible to reduce the falling sound (flashing sound) at the rear end. The invention of claim 4 is the invention of claim 1, 2 or 3.
In the above, the buffering projection has a curved surface at least in a part thereof. In this invention, a large R portion is provided in the rib shape in order to reduce the contact area with the recording paper as much as possible. For this reason, without cost
It is possible to more reliably achieve the effect of suppressing the falling sound at the trailing edge of the recording sheet without affecting the setting property of the recording sheet.

【0008】請求項5の発明は、記録用紙束を積載した
給紙トレイと、給紙トレイ内の記録用紙束最上面に接し
て回転することにより記録用紙を給紙する給紙コロと、
給紙コロにより給紙された記録用紙を搬送する搬送経路
と、搬送経路の特定部位に記録用紙をガイドするために
該特定部位の直前に配置された可撓性板状のガイドマイ
ラーと、を備えた給紙装置において、前記ガイドマイラ
ーの先端エッジ部分を凹凸形状としたことを特徴とす
る。特開2001−88971に示すような従来の給紙
装置においては、ローラ対(搬送ローラ対、レジストロ
ーラ対)のニップ部分やガイド部品間等、搬送経路上の
特定部位に対して記録用紙を正確にガイドする目的でガ
イドマイラー(樹脂製の撓性板状部品)が配置されてい
るが、このガイドマイラーの先端のエッジと記録用紙の
摺動音が問題となっている。そこで、本発明では、使用
するガイドマイラーの先端エッジ部の形状を、短冊状等
の凹凸形状にするなどして、先端エッジ部分の長さを全
幅に対して極力短くして摺動音を低減した。このため、
記録用紙をガイドする、という機能を損なうことなく、
かつほとんどコストもかけずに、摺動音を削減すること
が可能となり、ユーザーに不快感を与えないマシンを提
供することができる。請求項6の発明は、請求項1、
2、3、5又は6の何れか一項に記載の給紙装置と、画
像形成部と、を少なくとも備えたことを特徴とする。こ
れによれば、上記各請求項に記載の効果を備えた画像形
成装置を提供することが可能となる。
According to a fifth aspect of the present invention, there is provided a paper feed tray on which a bundle of recording paper is stacked, and a paper feed roller for feeding the recording paper by rotating in contact with the uppermost surface of the bundle of recording paper in the paper feed tray.
A transport path for transporting the recording paper fed by the paper feed roller, and a flexible plate-shaped guide mylar arranged immediately before the specific portion of the transport path for guiding the recording paper. In the provided sheet feeding device, the leading edge portion of the guide mylar has an uneven shape. In the conventional sheet feeding device as shown in Japanese Patent Laid-Open No. 2001-88971, a recording sheet is accurately recorded at a specific portion on a conveyance path such as a nip portion of a roller pair (conveyance roller pair, registration roller pair) or between guide parts. A guide mylar (flexible plate-shaped component made of resin) is arranged for the purpose of guiding to, but the sliding noise between the leading edge of the guide mylar and the recording paper poses a problem. Therefore, in the present invention, the shape of the tip edge portion of the guide mylar to be used is made into a concavo-convex shape such as a strip shape, and the length of the tip edge portion is made as short as possible with respect to the entire width to reduce sliding noise. did. For this reason,
Without impairing the function of guiding the recording paper,
In addition, it is possible to reduce the sliding noise with almost no cost, and it is possible to provide a machine that does not cause discomfort to the user. The invention of claim 6 relates to claim 1,
At least the sheet feeding device described in any one of 2, 3, 5 and 6 and an image forming unit are provided. According to this, it is possible to provide an image forming apparatus having the effects described in the above claims.

【0009】[0009]

【発明の実施の形態】以下、本発明を図面に示した実施
の形態により詳細に説明する。図1は本発明の給紙装置
を備えた画像形成装置の概略構成説明図、図2はその要
部構成を示す拡大図である。この画像形成装置は装置本
体下部に給紙装置1を備え、給紙装置1の上方には順次
画像形成部50、書込み光学系60、読取り光学系7
0、自動原稿給紙装置80を備えている。画像形成部5
0は、この例では、電子写真プロセスを利用したタイプ
であり、潜像担持体としての感光体51、感光体表面を
一様に帯電させる帯電部52、原稿反射光その他の光学
的な画像データを感光体上に照射して静電潜像を形成す
る露光部53、静電潜像をトナーにより現像する現像部
54、感光体上のトナー像を記録用紙に転写する転写部
55、記録用紙上のトナー像を定着する定着部56を備
えている。書込み光学系60は、読取り光学系70、或
いは図示しないホストマシンからの画像データに基づい
てレーザ光から成る書込みデータを露光部53から感光
体上に書込む。この給紙装置1は、搬送経路2を経て、
上方に位置する画像形成部に向けて一枚ずつ記録用紙を
給送する手段である。この給紙装置1は、給紙トレイ5
と、給紙コロ6と、ガイド部材7、8と、搬送ローラ対
9と、図示しない駆動モータ等を有する。給紙トレイ5
は、外ケース10と、外ケース10内に上下動可能に支
持され上面に記録用紙Pを積載する底板11と、底板1
1を上向き付勢する弾性部材12と、底板11とは別個
に上下動可能に支持され且つ底板の上昇時に連動して上
昇するコーナー爪13と、を有する。給紙コロ6は、駆
動モータにより矢印で示す給紙方向へ回転駆動されるこ
とにより、最上部の記録用紙を図面左方に位置する搬送
経路2の下部入り口(搬送ローラ対9)へ送出する。こ
の際、コーナー爪13が記録用紙を分離する。ガイド部
材7、8は搬送経路2を構成しており、給紙トレイ側の
ガイド部材7は搬送ローラ対のニップ部に向けて上向き
傾斜したガイド上面7aを備え、給紙コロ6により送り
出されてきた最上部の記録用紙の先端を搬送ローラ対9
のニップ部にガイドする。ガイド部材7は、給紙トレイ
5(給紙コロ6)と搬送ローラ9との間に位置してお
り、そのガイド上面7aは下方に退避している。搬送経
路2の上部には、レジストローラ対20が配置されると
共に、レジストローラ対20の手前には、部材35によ
り支持されたレジスト導入ガイドマイラー15a、15
bが配置されている。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is an explanatory view of a schematic configuration of an image forming apparatus provided with a sheet feeding device of the present invention, and FIG. 2 is an enlarged view showing a configuration of a main part thereof. This image forming apparatus is provided with a sheet feeding device 1 at the lower portion of the main body of the apparatus, and an image forming section 50, a writing optical system 60, and a reading optical system 7 are arranged above the sheet feeding device 1 in order.
0, the automatic document feeder 80 is provided. Image forming unit 5
In this example, 0 is a type that uses an electrophotographic process, and includes a photoconductor 51 as a latent image carrier, a charging unit 52 that uniformly charges the surface of the photoconductor, original reflected light, and other optical image data. An exposure unit 53 that irradiates a photoreceptor with an electrostatic latent image, a developing unit 54 that develops the electrostatic latent image with toner, a transfer unit 55 that transfers the toner image on the photoreceptor to a recording sheet, a recording sheet. A fixing unit 56 for fixing the upper toner image is provided. The writing optical system 60 writes the writing data composed of a laser beam from the exposure unit 53 on the photoconductor based on the image data from the reading optical system 70 or a host machine (not shown). This paper feeding device 1 passes through a conveyance path 2 and
It is a means for feeding the recording sheets one by one toward the image forming unit located above. The paper feeding device 1 includes a paper feeding tray 5
It has a paper feed roller 6, guide members 7 and 8, a conveyance roller pair 9, and a drive motor (not shown). Paper tray 5
Is an outer case 10, a bottom plate 11 that is supported in the outer case 10 so as to be vertically movable, and has a top surface on which recording sheets P are stacked, and a bottom plate 1.
An elastic member 12 that biases 1 upward and a corner claw 13 that is supported separately from the bottom plate 11 so as to be vertically movable and that moves up in conjunction with the rise of the bottom plate. The paper feed roller 6 is driven to rotate in a paper feed direction indicated by an arrow by a drive motor, and thereby sends the uppermost recording paper to the lower entrance (conveyance roller pair 9) of the conveyance path 2 located on the left side of the drawing. . At this time, the corner claw 13 separates the recording paper. The guide members 7 and 8 compose the conveyance path 2, and the guide member 7 on the side of the paper feed tray has a guide upper surface 7a that is inclined upward toward the nip portion of the pair of conveyance rollers, and is fed by the paper feed roller 6. The leading edge of the uppermost recording sheet is paired with the transport roller 9
Guide to the nip part of. The guide member 7 is located between the paper feed tray 5 (paper feed roller 6) and the transport roller 9, and its guide upper surface 7a is retracted downward. A pair of registration rollers 20 is arranged above the conveyance path 2, and a pair of resist introduction guide mylars 15a, 15 supported by a member 35 are provided in front of the pair of registration rollers 20.
b is arranged.

【0010】本発明の第1の実施形態に係る給紙装置の
特徴的な構成は、樹脂、或いは金属等から成るガイド部
材7の傾斜した平坦なガイド上面7aの少なくとも一部
に緩衝用突部31を配置し、搬送ローラ対9により上向
き搬送される記録用紙の後端部を緩衝用突部31に当接
させるように構成した点にある。緩衝用突部31を配置
する位置は、落下してきた記録用紙後端が衝突するガイ
ド上面部分に限定すればよい。緩衝用突部31は、発泡
ゴム等の弾性材料から構成し、ガイド上面7aの幅方向
(給紙方向と直交する方向)の全長に渡って、或いは所
定ピッチをおいて配置される。この例では板状の緩衝用
突部31をガイド上面7aに接着等により後付けした構
成となっている。この際、緩衝用突部31の角部を面取
りして一部又は全面を曲面状に構成することにより、衝
突、摺動による音を更に緩和することが可能となる。緩
衝用突部31は、コーナー爪13を乗り越えてガイド上
面7aに沿って上向きに移動し、先端を搬送ローラ対9
によりニップされて搬送経路2を上向き搬送される記録
用紙の後端部がコーナー爪13から落下してガイド上面
7aに衝突する位置に配置されて、衝突により発生する
音を吸収緩和する。また、上記特開2001−8897
1に記載の給紙装置のように、ユーザーが操作するコー
ナー爪に突起などを設ける必要もなく、記録用紙補充な
どのユーザー操作に悪影響を与える懸念もない。
The characteristic structure of the sheet feeding device according to the first embodiment of the present invention is that a buffering projection is provided on at least a part of the inclined flat guide upper surface 7a of the guide member 7 made of resin or metal. 31 is arranged, and the rear end portion of the recording sheet that is conveyed upward by the conveying roller pair 9 is brought into contact with the buffering protrusion 31. The position where the buffering protrusion 31 is arranged may be limited to the upper surface of the guide where the trailing edge of the recording sheet that has fallen collides. The cushioning protrusions 31 are made of an elastic material such as foamed rubber, and are arranged over the entire length of the guide upper surface 7a in the width direction (direction orthogonal to the sheet feeding direction) or at a predetermined pitch. In this example, the plate-shaped cushioning projection 31 is attached to the upper surface 7a of the guide by adhesion or the like. At this time, by chamfering the corners of the cushioning protrusion 31 and forming a part or the entire surface into a curved surface, it is possible to further reduce the noise caused by collision and sliding. The cushioning protrusion 31 rides over the corner claw 13 and moves upward along the guide upper surface 7a, and the tip thereof is conveyed by the pair of conveying rollers 9.
The trailing edge of the recording sheet that is nipped by and is conveyed upward in the conveying path 2 is arranged at a position where it falls from the corner claw 13 and collides with the guide upper surface 7a, and absorbs and absorbs sound generated by the collision. Moreover, the above-mentioned JP 2001-8897 A.
Unlike the sheet feeding device described in 1, there is no need to provide projections or the like on the corner claws operated by the user, and there is no fear of adversely affecting user operations such as replenishment of recording paper.

【0011】次に、図3(a)及び(b)は本発明の第
2の実施形態に係る給紙装置の要部構成図であり、この
実施形態ではガイド部材7のガイド上面7a上の用紙後
端の衝突位置に、予め複数のリブ32から成る緩衝用突
部を一体的に突設配置している。また、複数のリブ32
により落下してきた記録用紙の後端縁を受けるように構
成しているため、記録用紙後端との衝突部の形状を、従
来のような面状ではなく線状にすることができる。これ
により、衝突による瞬発音を緩和させることが可能とな
る。また、上記第1の実施形態と同様の騒音防止効果
を、コスト増を招くことなく実現でき、低価格な画像形
成装置の給紙装置として採用することも可能である。ま
た、上で述べたリブ32の形状を通常の直線的な形状
(平坦面形状)ではなく、図3に示した如きR形状(こ
の例では、R20)にすることにより、線状に衝突して
いた記録用紙後端縁とガイド上面7aとをさらに“点”
で接触させることが可能となる。これにより、さらに瞬
発音を削減することができる。次に、図4は図1に示し
た給紙装置1の一部、即ちレジストローラ対20のニッ
プ部直前の部分を拡大した図を示す。記録用紙Pの進行
方向に対し、平行になるように可撓性材料から成るガイ
ドマイラー15a、15bが対向設置されており、これ
により記録用紙Pはレジストニップ部に導かれる。ここ
で、図中アで示す部分において摺動音が発生し易い、と
いう問題がある。即ち、この部分では、記録用紙Pのコ
シの強弱、進入経路によっては反対側にあるガイドマイ
ラー15a(15b)の先端部分で記録用紙との摺動が
発生し、騒音源となる。ガイドマイラー15a(15
b)の先端エッジ部分と記録用紙Pの腹がこすれること
により、摺動音が発生するのである。これは前述したコ
ーナー爪から記録用紙後端部が落下する際にガイド部材
との間で発生する瞬発音とは異なり、通紙中は常時発生
する音であり、騒音測定における音響パワーレベルへ与
える影響も大きい。
Next, FIGS. 3 (a) and 3 (b) are configuration diagrams of a main part of a sheet feeding device according to a second embodiment of the present invention. In this embodiment, on a guide upper surface 7a of a guide member 7. At the collision position at the trailing edge of the sheet, a cushioning projection composed of a plurality of ribs 32 is integrally provided in advance in a protruding manner. Also, a plurality of ribs 32
Since it is configured to receive the trailing edge of the recording sheet that has dropped due to, the shape of the collision portion with the trailing edge of the recording sheet can be made linear rather than the conventional planar shape. This makes it possible to mitigate the instantaneous sound produced by a collision. Further, it is possible to realize the same noise prevention effect as that of the first embodiment without increasing the cost, and it is also possible to employ it as a sheet feeding device of an inexpensive image forming apparatus. Further, by making the shape of the rib 32 described above not the normal linear shape (flat surface shape) but the R shape (R20 in this example) as shown in FIG. The trailing edge of the recording paper and the upper surface 7a of the guide, which are already present
It is possible to contact with. This can further reduce the instantaneous pronunciation. Next, FIG. 4 is an enlarged view of a part of the sheet feeding device 1 shown in FIG. 1, that is, a part immediately before the nip portion of the registration roller pair 20. Guide mylars 15a and 15b made of a flexible material are installed opposite to each other so as to be parallel to the traveling direction of the recording paper P, and thereby the recording paper P is guided to the registration nip portion. Here, there is a problem that sliding noise is likely to be generated in the portion indicated by A in the figure. That is, in this portion, the recording paper P slides on the recording paper at the tip portion of the guide mylar 15a (15b) on the opposite side depending on the strength and weakness of the recording paper P, and becomes a noise source. Guide Mylar 15a (15
The sliding noise is generated by rubbing the front edge portion of b) and the belly of the recording paper P. This is a sound that is constantly generated during paper passage, unlike the instantaneous sound generated between the guide member and the trailing edge of the recording paper when the trailing edge of the recording paper falls from the corner claws described above, and is applied to the sound power level in noise measurement. The impact is also great.

【0012】図5(a)(b)及び(c)はこのような
不具合を解決するための実施形態に係るガイドマイラー
の構成を示す平面図である。従来のガイドマイラーは単
純な長方形を有しているが、本発明の実施形態に係るガ
イドマイラーは先端エッジ部分が図に示すように極力短
くなるようにカットしてある。これにより前記のガイド
マイラー先端エッジと記録用紙の腹による摺動音が小さ
くなる。図5(a)の例では、長方形状のガイドマイラ
ーの先端縁(レジストローラ対側)を矩形の凸部40と
凹部41が交互に連続する形状にしている。換言すれ
ば、短冊状の凸部40を所定間隔を隔てて間欠配置した
構成を備えている。このように単純な長方形マイラーに
比べ、記録用紙との接触による摺動音が発生する先端エ
ッジ部分の面積が半分になっているため、発生する音量
も半減する。次に、図5(b)のガイドマイラーの例で
は、山形(略三角形状)の凸部40(谷部41が鋭角)
を所定のピッチで連続配置しており、従来の長方形のガ
イドマイラーに比べて約65%の音量を減少できる。更
に、図5(c)の例では、谷部41が鈍角の山形の凸部
40を所定のピッチにて連続形成しており、従来の長方
形のガイドマイラーに比べて約80%もの摺動音の削減
が見込まれる。なお、ガイドマイラーは、ローラ対のニ
ップ部のみならず、搬送経路の特定部位に記録用紙を正
確にガイドしたい場合一般に使用されるものである。な
お、本発明の給紙装置は、電子写真式の画像形成部を備
えた画像形成装置のみならず、あらゆるタイプの画像形
成部(印字部)を備え、且つ紙搬送機能を備えた産業機
器(例えば、ATM、印刷機等)にも適用可能である。
FIGS. 5 (a), 5 (b) and 5 (c) are plan views showing the construction of a guide mylar according to an embodiment for solving such a problem. Although the conventional guide mylar has a simple rectangular shape, the guide mylar according to the embodiment of the present invention is cut so that the tip edge portion is as short as possible as shown in the figure. This reduces the sliding noise caused by the leading edge of the guide mylar and the antinode of the recording sheet. In the example of FIG. 5A, the leading edge of the rectangular guide mylar (on the side of the registration roller) has a shape in which rectangular convex portions 40 and concave portions 41 are alternately continuous. In other words, it has a configuration in which the strip-shaped convex portions 40 are intermittently arranged at predetermined intervals. As described above, the area of the leading edge portion where sliding noise is generated due to contact with the recording paper is halved as compared with a simple rectangular mylar, so that the volume of sound generated is also halved. Next, in the example of the guide mylar of FIG. 5B, the mountain-shaped (substantially triangular) convex portion 40 (the valley portion 41 has an acute angle).
Are continuously arranged at a predetermined pitch, and the volume can be reduced by about 65% as compared with the conventional rectangular guide mylar. Further, in the example of FIG. 5 (c), the valleys 41 continuously form the obtuse angle-shaped convex portions 40 at a predetermined pitch, and the sliding noise is about 80% of that of the conventional rectangular guide mylar. Is expected to be reduced. The guide mylar is generally used not only for the nip portion of the roller pair but also for accurately guiding the recording sheet to a specific portion of the transport path. The sheet feeding device of the present invention is not limited to an image forming apparatus having an electrophotographic image forming unit, but an industrial device having an image forming unit (printing unit) of any type and a paper conveying function ( For example, it is also applicable to ATM, printing machines, etc.).

【0013】[0013]

【発明の効果】以上のように本発明によれば、給紙装置
から給紙された記録用紙を画像形成部等に給紙搬送する
場合に、給紙トレイから給紙された記録用紙の後端が記
録用紙束の上面からコーナー爪を越えてガイド部材上に
落下したときに発生する衝突音、摺動音の発生を防止す
ることができる。また、搬送ローラ対、レジストローラ
対のニップ部分やガイド部品間などに記録用紙をガイド
する目的でマイラーを使用している場合に、このマイラ
ーの先端のエッジと記録用紙との間の摺動音を低減する
ことができる。即ち、請求項1の発明によれば、給紙ト
レイと搬送経路との間に位置するガイド上面に予め緩衝
用突部を接着等により固定しておくことにより、記録紙
後端部とガイド上面との接触部を線状、或いは点状にす
ることができ、記録用紙の衝突による瞬発音を低減する
ことができる。従って、ユーザーの記録用紙セット性を
損なうことなく、コーナー爪上面(記録紙束上面)から
記録用紙後端が落下する際の音を緩和することが可能と
なり、ユーザーに不快感を与えないマシンを提供するこ
とができる。請求項2の発明によれば、緩衝用突部は、
弾性材料から構成されているので、記録用紙後端部がガ
イド上面に当接する位置に弾性材料を配置することによ
り、騒音を大幅に低減できる。請求項3の発明によれ
ば、緩衝用突部は、ガイド上面の幅方向に沿って所定の
ピッチで一体的に突設された複数のリブであるため、ガ
イド上面に予め一体成形したリブ状の緩衝用突部を配置
したので、コストを低減しながらも、ガイド上面と記録
用紙後端との接触部を線状とし、記録用紙後端の落下音
(瞬発音)を緩和することができる。
As described above, according to the present invention, when the recording paper fed from the paper feeding device is fed to the image forming section or the like, the recording paper after the recording paper fed from the paper feeding tray is conveyed. It is possible to prevent the generation of a collision noise and a sliding noise generated when the end of the stack of recording sheets falls from the upper surface of the bundle of recording sheets over the corner claws and falls on the guide member. Also, when using a mylar for the purpose of guiding the recording paper between the nip part of the transport roller pair and the registration roller pair or between the guide parts, the sliding noise between the edge of the tip of the mylar and the recording paper Can be reduced. That is, according to the first aspect of the present invention, the rear end portion of the recording paper and the upper surface of the guide are fixed to the upper surface of the guide located between the paper feed tray and the transport path by fixing the cushioning projection in advance by adhesion or the like. The contact portion with can be formed into a linear shape or a dot shape, and instantaneous sound generation due to the collision of the recording paper can be reduced. Therefore, the sound when the trailing edge of the recording paper falls from the upper surface of the corner claw (the upper surface of the recording paper bundle) can be reduced without impairing the user's ability to set the recording paper, and the machine that does not cause discomfort to the user can be provided. Can be provided. According to the invention of claim 2, the cushioning protrusion is
Since it is made of an elastic material, noise can be significantly reduced by disposing the elastic material at a position where the trailing edge of the recording paper abuts on the upper surface of the guide. According to the third aspect of the present invention, the cushioning projection is a plurality of ribs integrally projecting at a predetermined pitch along the width direction of the guide upper surface. Since the cushioning protrusions are arranged, the contact portion between the upper surface of the guide and the trailing edge of the recording sheet can be made linear to reduce the drop sound (flashing sound) at the trailing edge of the recording sheet while reducing the cost. .

【0014】請求項4の発明によれば、少しでも記録用
紙との接触面積を減らす為に、リブ形状に大きなR部を
設けている。このため、コストをかけずに、記録用紙の
セット性に影響を与えることなく、記録用紙後端の落下
音を抑制するという効果をより確実に達成することがで
きる。請求項5の発明によれば、使用するガイドマイラ
ーの先端エッジ部の形状を、短冊状等の凹凸形状にする
などして、先端エッジ部分の長さを全幅に対して極力短
くして摺動音を低減したので、記録用紙をガイドする、
という機能を損なうことなく、かつほとんどコストもか
けずに、摺動音を削減することが可能となり、ユーザー
に不快感を与えないマシンを提供することができる。請
求項6の発明によれば、上記各請求項に記載の効果を備
えた画像形成装置を提供することが可能となる。
According to the invention of claim 4, in order to reduce the contact area with the recording paper as much as possible, a large R portion is provided in the rib shape. Therefore, it is possible to more reliably achieve the effect of suppressing the falling sound at the trailing edge of the recording paper without affecting the setting property of the recording paper at low cost. According to the invention of claim 5, the shape of the leading edge portion of the guide mylar to be used is made into a concavo-convex shape such as a strip shape, and the length of the leading edge portion is made as short as possible with respect to the entire width for sliding. Since the sound has been reduced, guide the recording paper,
The sliding noise can be reduced without impairing the above function and at almost no cost, and it is possible to provide a machine that does not cause user discomfort. According to the invention of claim 6, it is possible to provide an image forming apparatus having the effects described in the above claims.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の給紙装置を備えた画像形成装置の概略
構成説明図。
FIG. 1 is a schematic configuration explanatory diagram of an image forming apparatus including a sheet feeding device of the present invention.

【図2】図1の要部構成を示す拡大図。FIG. 2 is an enlarged view showing a configuration of a main part of FIG.

【図3】(a)及び(b)は本発明の第2の実施形態に
係る給紙装置の要部構成図。
3A and 3B are configuration diagrams of a main part of a sheet feeding device according to a second embodiment of the present invention.

【図4】本発明の他の実施形態に対応する課題を説明す
るための図。
FIG. 4 is a diagram for explaining a problem corresponding to another embodiment of the present invention.

【図5】(a)(b)及び(c)はガイドマイラーの形
状の例を示す図。
5A, 5B and 5C are views showing examples of the shape of a guide mylar.

【図6】(a)及び(b)は従来の給紙装置の説明図。6A and 6B are explanatory views of a conventional sheet feeding device.

【符号の説明】[Explanation of symbols]

1 給紙装置、5 給紙トレイ、6 給紙コロ、7、8
ガイド部材、7aガイド上面、9 搬送ローラ対、1
0 外ケース、11 底板、12 弾性部材、13 コ
ーナー爪、15a、15b レジスト導入マイラー(ガ
イドマイラー)、20 レジストローラ対、31 緩衝
用突部、32 リブ(緩衝用突部)、40 凸部、41
凹部、50 画像形成部、51 感光体、52 帯電
部、53 露光部、54 現像部、55 転写部、56
定着部、60 書込み光学系、70 読取り光学系、
80 自動原稿給紙装置。
1 paper feeding device, 5 paper feeding trays, 6 paper feeding rollers, 7, 8
Guide member, 7a guide upper surface, 9 conveyance roller pairs, 1
0 outer case, 11 bottom plate, 12 elastic member, 13 corner claws, 15a, 15b resist introduction mylar (guide mylar), 20 registration roller pair, 31 buffer protrusion, 32 rib (buffer protrusion), 40 protrusion, 41
Recesses, 50 Image forming part, 51 Photoreceptor, 52 Charging part, 53 Exposure part, 54 Developing part, 55 Transfer part, 56
Fixing unit, 60 writing optical system, 70 reading optical system,
80 automatic document feeder.

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 記録用紙束を積載した給紙トレイと、給
紙トレイ内の記録用紙束最上面に接して回転することに
より記録用紙を給紙する給紙コロと、給紙コロにより給
紙された記録用紙を搬送する搬送ローラ対を備えた搬送
経路と、給紙コロと搬送ローラ対との間に位置し給紙さ
れた記録用紙を搬送ローラ対にガイドするガイド上面を
備えたガイド部材と、を備えた給紙装置であって、給紙
コロにより給紙された記録用紙後端部がガイド上面に衝
突する構成を備えたものにおいて、 前記ガイド部材のガイド上面の少なくとも一部に緩衝用
突部を配置し、搬送ローラ対により搬送される記録用紙
の後端部を該緩衝用突部に当接させるように構成したこ
とを特徴とする給紙装置。
1. A paper feed tray on which a bundle of recording paper is stacked, a paper feed roller for feeding the recording paper by rotating in contact with the uppermost surface of the bundle of recording paper in the paper feed tray, and a paper feed by a paper feed roller. Member having a conveying path including a conveying roller pair for conveying the formed recording sheet, and a guide upper surface positioned between the paper feed roller and the conveying roller pair for guiding the fed recording sheet to the conveying roller pair And a structure in which the trailing edge of the recording paper fed by the paper feed roller collides with the upper surface of the guide, and the buffer is provided on at least a part of the upper surface of the guide of the guide member. A sheet feeding device, characterized in that a projecting portion is arranged and a rear end portion of a recording sheet conveyed by a pair of conveying rollers is brought into contact with the buffering projecting portion.
【請求項2】 前記緩衝用突部は、弾性材料から構成さ
れていることを特徴とする請求項1に記載の給紙装置。
2. The sheet feeding device according to claim 1, wherein the cushioning protrusion is made of an elastic material.
【請求項3】 前記緩衝用突部は、前記ガイド上面の幅
方向に沿って所定のピッチで一体的に突設された複数の
リブであることを特徴とする請求項1に記載の給紙装
置。
3. The sheet feeding device according to claim 1, wherein the cushioning protrusion is a plurality of ribs integrally provided at a predetermined pitch along the width direction of the guide upper surface. apparatus.
【請求項4】 前記緩衝用突部は、少なくともその一部
に湾曲面を有していることを特徴とする請求項1、2又
は3の何れか一項に記載の給紙装置。
4. The paper feeding device according to claim 1, wherein the cushioning protrusion has a curved surface at least in a part thereof.
【請求項5】 記録用紙束を積載した給紙トレイと、給
紙トレイ内の記録用紙束最上面に接して回転することに
より記録用紙を給紙する給紙コロと、給紙コロにより給
紙された記録用紙を搬送する搬送経路と、搬送経路の特
定部位に記録用紙をガイドするために該特定部位の直前
に配置された可撓性板状のガイドマイラーと、を備えた
給紙装置において、前記ガイドマイラーの先端エッジ部
分を凹凸形状としたことを特徴とする給紙装置。
5. A paper feed tray on which a bundle of recording paper is stacked, a paper feed roller for feeding the recording paper by rotating in contact with the uppermost surface of the bundle of recording paper in the paper feed tray, and a paper feed by a paper feed roller. In a paper feeding device including a transport path for transporting the recorded recording sheet, and a flexible plate-shaped guide mylar arranged immediately before the specific portion for guiding the recording sheet to a specific portion of the transport path. A sheet feeding device, wherein the leading edge portion of the guide mylar has an uneven shape.
【請求項6】 請求項1、2、3、4又は5の何れか一
項に記載の給紙装置と、画像形成部と、を少なくとも備
えたことを特徴とする画像形成装置。
6. An image forming apparatus comprising at least the paper feeding device according to claim 1, and an image forming unit.
JP2002131877A 2002-05-07 2002-05-07 Paper sheet feeder, and image forming device using the same Pending JP2003321144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002131877A JP2003321144A (en) 2002-05-07 2002-05-07 Paper sheet feeder, and image forming device using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002131877A JP2003321144A (en) 2002-05-07 2002-05-07 Paper sheet feeder, and image forming device using the same

Publications (1)

Publication Number Publication Date
JP2003321144A true JP2003321144A (en) 2003-11-11

Family

ID=29544311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002131877A Pending JP2003321144A (en) 2002-05-07 2002-05-07 Paper sheet feeder, and image forming device using the same

Country Status (1)

Country Link
JP (1) JP2003321144A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008026808A (en) * 2006-07-25 2008-02-07 Brother Ind Ltd Image forming apparatus and process cartridge
JP2010173785A (en) * 2009-01-29 2010-08-12 Brother Ind Ltd Image forming device and paper conveying device
JP2012203225A (en) * 2011-03-25 2012-10-22 Brother Ind Ltd Image forming apparatus
JP2013043724A (en) * 2011-08-23 2013-03-04 Ricoh Co Ltd Conveying device and image forming apparatus
US10023410B2 (en) 2016-03-31 2018-07-17 Brother Kogyo Kabushiki Kaisha Sheet conveying apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008026808A (en) * 2006-07-25 2008-02-07 Brother Ind Ltd Image forming apparatus and process cartridge
JP2010173785A (en) * 2009-01-29 2010-08-12 Brother Ind Ltd Image forming device and paper conveying device
JP4715929B2 (en) * 2009-01-29 2011-07-06 ブラザー工業株式会社 Image forming apparatus and sheet conveying apparatus
US8725056B2 (en) 2009-01-29 2014-05-13 Brother Kogyo Kabushiki Kaisha Image forming apparatus
JP2012203225A (en) * 2011-03-25 2012-10-22 Brother Ind Ltd Image forming apparatus
JP2013043724A (en) * 2011-08-23 2013-03-04 Ricoh Co Ltd Conveying device and image forming apparatus
US10023410B2 (en) 2016-03-31 2018-07-17 Brother Kogyo Kabushiki Kaisha Sheet conveying apparatus

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