JPH04223935A - Paper feeding device - Google Patents
Paper feeding deviceInfo
- Publication number
- JPH04223935A JPH04223935A JP2406011A JP40601190A JPH04223935A JP H04223935 A JPH04223935 A JP H04223935A JP 2406011 A JP2406011 A JP 2406011A JP 40601190 A JP40601190 A JP 40601190A JP H04223935 A JPH04223935 A JP H04223935A
- Authority
- JP
- Japan
- Prior art keywords
- friction pad
- paper
- pressure
- feeding roller
- outer cover
- 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
- 108091008695 photoreceptors Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、画像形成装置の給紙装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for an image forming apparatus.
【０００２】0002
【従来の技術】複写機、プリンタ、ファクシミリ、印刷
機等の画像形成装置の給紙装置としては、装置本体の所
定の位置に装着された給紙カセット内に装填された用紙
束の上面前端部が装置本体機枠に軸支された給送ローラ
に圧接するようにし、給紙信号により一定時間給送ロー
ラを回転させることにより用紙束の上から順に用紙を繰
出すようにしている。繰出された用紙の重送を分離して
１枚ずつ送り出す重送分離手段としては、用紙給送経路
を挟んで上記給送ローラに圧接する摩擦パッドが構成が
簡単なところから広く使用されている。2. Description of the Related Art A paper feeding device for an image forming apparatus such as a copying machine, a printer, a facsimile machine, or a printing machine uses the upper front end of a stack of paper loaded in a paper feeding cassette installed at a predetermined position in the main body of the apparatus. is brought into pressure contact with a feed roller that is pivotally supported on the frame of the main body of the apparatus, and by rotating the feed roller for a certain period of time in response to a paper feed signal, the sheets are fed out in order from the top of the stack of sheets. As a multi-feed separating means for separating multi-fed sheets of paper and feeding them one by one, a friction pad that presses against the above-mentioned feeding roller across the paper feeding path is widely used because of its simple structure. .
【０００３】図３は、摩擦パッド方式の重送分離機構を
有するレーザプリンタの全体概略構成を示す図である。
装置本体内所定の位置に装着された給紙カセット１に積
載された用紙束２の前半部を載置する可動底板３はバネ
４により、装置本体機枠に軸支された給送ローラ５に圧
接され、該給送ローラ５が給紙信号により所定時間回転
することにより用紙束の上から順に繰出される。給送ロ
ーラ５には用紙搬送路を挟んで摩擦パッド６が圧接して
おり、給送ローラ５と摩擦パッド６との間を用紙が通過
することにより、用紙の重送が分離され、１枚ずつ給紙
搬送路７を搬送され、レジストローラ８に先端を衝接さ
せて待機し、感光体９上に形成されたトナー像の先端と
先端が整合するタイミングで搬送が再開され、感光体９
に接する転写部で転写チャージャ１０の作用のもとにト
ナー像が転写され、定着装置１１で定着され、排出ロー
ラ１２により機外に排出されて画像形成が完了する。FIG. 3 is a diagram showing the overall general configuration of a laser printer having a friction pad type multi-feed separation mechanism. A movable bottom plate 3 on which the front half of a stack of sheets 2 loaded in a paper feed cassette 1 mounted at a predetermined position in the apparatus main body is placed is moved by a spring 4 to a feed roller 5 that is pivotally supported on the frame of the apparatus main body. The sheets are pressed against each other, and the feeding roller 5 is rotated for a predetermined period of time in response to a sheet feeding signal, so that the sheet bundle is fed out in order from the top. A friction pad 6 is in pressure contact with the feeding roller 5 across the paper conveyance path, and as the paper passes between the feeding roller 5 and the friction pad 6, double feeding of paper is separated and a single sheet is separated. The paper is conveyed through the feed conveyance path 7, and waits with its leading edge colliding with the registration roller 8. At the timing when the leading edge of the toner image formed on the photoreceptor 9 and the leading edge are aligned, conveyance is resumed, and the sheet is conveyed through the photoreceptor 9.
A toner image is transferred under the action of a transfer charger 10 at a transfer portion in contact with the toner image, fixed by a fixing device 11, and discharged outside the machine by a discharge roller 12 to complete image formation.
【０００４】この例では、給紙カセット１は、カセット
前方の外装カバー１６を開いて装置本体内に装着し、装
置から取出して用紙の補給をするようになっている。
又、摩擦パッド６は給紙カセット１の前端面に取付けら
れており、装置本体に給紙カセット１を装着、離脱する
動作に連動して給送ローラ５と摩擦パッド６との間の圧
を印加し、解除するようにされている。したがって、給
紙部付近で用紙のジャムが発生した場合でも、給紙カセ
ット１を一旦引出さなくてはジャム処理ができなかった
。In this example, the paper feed cassette 1 is installed into the main body of the apparatus by opening the outer cover 16 at the front of the cassette, and then taken out from the apparatus to replenish paper. Further, the friction pad 6 is attached to the front end surface of the paper feed cassette 1, and the pressure between the feed roller 5 and the friction pad 6 is increased in conjunction with the operation of installing and removing the paper feed cassette 1 from the main body of the apparatus. The voltage is applied and released. Therefore, even if a paper jam occurs near the paper feed section, the jam cannot be cleared without first pulling out the paper feed cassette 1.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記構成の
従来の画像形成装置の給紙部に発生するジャムの処理の
上述の問題点にかんがみ、給紙部でのジャム紙の除去を
給紙カセットを操作することなく簡単に行なうことので
きる給紙装置を提供することを課題とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems in handling paper jams that occur in the paper feed section of the conventional image forming apparatus having the above configuration, the present invention has been made to remove jammed paper in the paper feed section. It is an object of the present invention to provide a paper feeding device that can be easily operated without operating a paper cassette.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記の課題を
解決させるため、装置本体の開閉可能な外装カバーを開
いて給紙カセットを装置本体内所定の位置に装着した後
上記外装カバーを閉じ、カセットに積載された用紙を装
置本体機枠に軸支され用紙束上面前端に圧接する給送ロ
ーラにより最上部より繰出すとともに用紙給送経路を挟
んで該給送ローラに圧接する摩擦パッドにより重送を分
離して１枚ずつ送り出す画像形成装置の給紙装置におい
て、上記外装カバーの開動作に連動して給送ローラと摩
擦パッドの圧を解除し、外装カバーの閉動作に連動して
摩擦パッドの圧を印加する連動機構を有することを特徴
とする。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is directed to opening the openable/closable exterior cover of the apparatus main body, installing the paper feed cassette at a predetermined position within the apparatus main body, and then closing the exterior cover. When the cassette is closed, the paper loaded in the cassette is fed out from the top by a feeding roller that is pivoted on the machine frame of the device and presses against the front end of the top surface of the paper bundle, and a friction pad that presses against the feeding roller across the paper feeding path. In a paper feeding device of an image forming apparatus that separates double feeding and feeds sheets one by one, the pressure between the feeding roller and the friction pad is released in conjunction with the opening operation of the exterior cover, and the pressure on the friction pad is released in conjunction with the closing operation of the exterior cover. The friction pad is characterized by having an interlocking mechanism that applies pressure to the friction pad.
【０００７】[0007]
【作用】この発明の給紙装置は上記の如く構成されてい
るので、給紙部でジャムが発生した場合、外装カバーを
開けば給送ローラと摩擦パッドとの間の圧が解除され、
給紙カセットを引出す必要もなくジャム紙を除去するこ
とができる。ジャム紙を除去した後、外装カバーを閉じ
れば摩擦パッドと給送ローラとの間に圧が印加されるの
で、給紙が可能となる。[Operation] Since the paper feeding device of the present invention is constructed as described above, if a jam occurs in the paper feeding section, the pressure between the feeding roller and the friction pad is released by opening the outer cover.
Jammed paper can be removed without the need to pull out the paper feed cassette. After removing the jammed paper, if the outer cover is closed, pressure is applied between the friction pad and the feeding roller, allowing paper feeding.
【０００８】[0008]
【実施例】以下に本発明の実施例を、図面に基づいて詳
細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings.
【０００９】図１、図２は本発明を図３で説明した装置
に適用した実施例の給紙カセット前端部及び摩擦パッド
近傍の構成を示す。したがって、同一機能を有する部材
には同一の符号を付して説明する。この装置では、摩擦
パッド６は装置本体機枠に軸支された軸に結合されてお
り、この軸にはセクターギヤ１９が一体的に取付けられ
ている。一方、給紙カセット１を着脱する際は開閉する
外装カバー１６は軸１７により装置本体に対して回動さ
せて開閉できるように取付けられており、軸１７は外装
カバー１６と一体に回動する。この軸１７には、さらに
セクターギヤ２０が取付けられており、このセクターギ
ヤ２０は外装カバー１６を開いて行く段階で前記のセク
ターギヤ１９と噛合うようになっている。又、摩擦パッ
ド６は加圧バネ１５により、給送ローラ５に圧接する方
向に付勢されている。FIGS. 1 and 2 show the structure of the front end of the paper feed cassette and the vicinity of the friction pad in an embodiment in which the present invention is applied to the apparatus described in FIG. 3. Therefore, members having the same functions will be described with the same reference numerals. In this device, the friction pad 6 is connected to a shaft supported by the frame of the main body of the device, and a sector gear 19 is integrally attached to this shaft. On the other hand, the exterior cover 16, which is opened and closed when the paper feed cassette 1 is attached or removed, is attached by a shaft 17 so that it can be opened and closed by rotating with respect to the main body of the apparatus, and the shaft 17 rotates together with the exterior cover 16. . A sector gear 20 is further attached to this shaft 17, and this sector gear 20 meshes with the sector gear 19 when the exterior cover 16 is opened. Furthermore, the friction pad 6 is biased by a pressure spring 15 in a direction in which it comes into pressure contact with the feeding roller 5 .
【００１０】図１は、外装カバー１６を閉じた状態を示
し、セクターギヤ１９，２０は外れ、摩擦パッド６は加
圧バネ１５の力により給送ローラ５に所定の押圧力で圧
接している。FIG. 1 shows a state in which the exterior cover 16 is closed, the sector gears 19 and 20 are removed, and the friction pad 6 is pressed against the feed roller 5 with a predetermined pressing force by the force of the pressure spring 15. .
【００１１】この状態から、図２に示す如く外装カバー
１６を軸１７を軸として倒して開いて行くと、セクター
ギヤ１９，２０は互いに噛合いを開始し、図２中に矢印
で示す如く、セクターギヤ１９は加圧バネの付勢力に抗
して軸を介して摩擦パッド６と一体的に反時計方向に回
動し、摩擦パッド６は給送ローラ５から離間する。From this state, as shown in FIG. 2, when the exterior cover 16 is opened by tilting it down about the shaft 17, the sector gears 19 and 20 begin to mesh with each other, as shown by the arrows in FIG. The sector gear 19 rotates counterclockwise integrally with the friction pad 6 via the shaft against the biasing force of the pressure spring, and the friction pad 6 separates from the feeding roller 5.
【００１２】したがって、給紙部の給送ローラ近傍でジ
ャムが発生した場合は、外装カバー１６を開けば摩擦パ
ッド６は給送ローラ５から離間するので、外装カバーの
開かれた開口から手を差し込んでジャム紙を除去するこ
とができる。Therefore, if a jam occurs in the vicinity of the feed roller of the paper feed section, the friction pad 6 will be separated from the feed roller 5 by opening the outer cover 16, so that you can remove your hand from the open opening of the outer cover. You can remove jammed paper by inserting it.
【００１３】[0013]
【発明の効果】以上の如く、本発明によれば、外装カバ
ーを開放するのみで摩擦パッドの給送ローラに対する圧
を解除することができ、閉じれば摩擦パッドの給送ロー
ラに対する圧が印加されるので、ジャム処理が簡単にな
る。As described above, according to the present invention, the pressure of the friction pad on the feeding roller can be released by simply opening the exterior cover, and the pressure of the friction pad on the feeding roller can be applied by closing it. This simplifies jam handling.
【図１】本発明の実施例の給紙部外装カバーを閉じた状
態を示す断面図である。FIG. 1 is a cross-sectional view showing a closed state of a paper feed unit exterior cover according to an embodiment of the present invention.
【図２】その実施例の外装カバーを開いた状態を示す断
面図である。FIG. 2 is a sectional view showing a state in which the exterior cover of the embodiment is opened.
【図３】本発明が適用される給紙部を有する画像形成装
置の一例の全体構成を示す断面図である。FIG. 3 is a cross-sectional view showing the overall configuration of an example of an image forming apparatus having a paper feeding section to which the present invention is applied.
１ 給紙カセット ２ 用紙束 ５ 給送ローラ ６ 摩擦パッド １５ 加圧バネ １６ 外装カバー １７ 軸 1 Paper cassette 2 Paper stack 5 Feeding roller 6 Friction pad 15 Pressure spring 16 Exterior cover 17 axis
Claims (2)
いて給紙カセットを装置本体内所定の位置に装着した後
上記外装カバーを閉じ、カセットに積載された用紙を装
置本体機枠に軸支され用紙束上面前端に圧接する給送ロ
ーラにより最上部より繰出すとともに用紙給送経路を挟
んで該給送ローラに圧接する摩擦パッドにより重送を分
離して１枚ずつ送り出す画像形成装置の給紙装置におい
て、上記外装カバーの開動作に連動して給送ローラと摩
擦パッドの圧を解除し、外装カバーの閉動作に連動して
摩擦パッドの圧を印加する連動機構を有することを特徴
とする給紙装置。Claim 1: Open the openable and closable outer cover of the apparatus main body, install the paper feed cassette in a predetermined position inside the apparatus main body, close the outer cover, and pivot the paper loaded in the cassette to the machine frame of the apparatus main body. An image forming apparatus feeds the paper stack from the top by a feeding roller that presses against the front edge of the upper surface of the stack, and separates double feeding and feeds out one sheet at a time using a friction pad that presses against the feeding roller across the paper feeding path. The paper device is characterized by having an interlocking mechanism that releases the pressure between the feeding roller and the friction pad in conjunction with the opening operation of the exterior cover, and applies the pressure of the friction pad in conjunction with the closing operation of the exterior cover. paper feed device.
上記給送ローラに接離する方向に回動自在に軸支され、
上記の連動機構は外装カバーと一体に回動する軸に固設
された第１セクターギヤと、上記摩擦パッドと一体的に
回動する軸に固設され、上記第１セクターギヤと噛合い
可能な第２セクターギヤと上記の摩擦パッドを給送ロー
ラに圧接する方向に付勢する手段とを有して成り、上記
外装カバーの開動作により上記第１セクターギヤと第２
セクターギヤとは噛合い、上記の加圧バネの付勢力に抗
して、上記摩擦パッドの上記給送ローラに対する圧を解
除し、上記外装カバーの閉動作により上記２つのセクタ
ーギヤの噛合いが外れ上記摩擦パッドは加圧バネにより
上記給送ローラに圧接するように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。Claim 2: The above-mentioned friction pad is attached to the machine frame of the main body of the device.
It is rotatably supported in the direction of approaching and separating from the above-mentioned feeding roller,
The above interlocking mechanism has a first sector gear fixed to a shaft that rotates together with the exterior cover, and a first sector gear that is fixed to a shaft that rotates together with the friction pad, and can mesh with the first sector gear. a second sector gear and a means for biasing the friction pad in a direction in which the friction pad is brought into pressure contact with the feeding roller, and the first sector gear and the second sector gear are
The two sector gears mesh with each other, and the pressure of the friction pad against the feeding roller is released against the biasing force of the pressure spring, and the closing action of the exterior cover causes the two sector gears to mesh. 2. The paper feeding device according to claim 1, wherein the friction pad is brought into pressure contact with the feeding roller by a pressure spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406011A JPH04223935A (en) | 1990-12-25 | 1990-12-25 | Paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406011A JPH04223935A (en) | 1990-12-25 | 1990-12-25 | Paper feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04223935A true JPH04223935A (en) | 1992-08-13 |
Family
ID=18515637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2406011A Pending JPH04223935A (en) | 1990-12-25 | 1990-12-25 | Paper feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04223935A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09278211A (en) * | 1996-04-16 | 1997-10-28 | Pfu Ltd | Document medium processing device having pad open condition releasing means |
| KR20010058639A (en) * | 1999-12-30 | 2001-07-06 | 윤종용 | Door open apparatus for printing device and paper jam recovery method using it |
| US7261185B2 (en) | 2004-03-17 | 2007-08-28 | Inventio Ag | Equipment for fine positioning of a car of a multi-stage car |
| US7427062B2 (en) | 2005-10-19 | 2008-09-23 | Samsung Electronics Co., Ltd. | Automatic document feeder and image reading apparatus using the same |
-
1990
- 1990-12-25 JP JP2406011A patent/JPH04223935A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09278211A (en) * | 1996-04-16 | 1997-10-28 | Pfu Ltd | Document medium processing device having pad open condition releasing means |
| KR20010058639A (en) * | 1999-12-30 | 2001-07-06 | 윤종용 | Door open apparatus for printing device and paper jam recovery method using it |
| US7261185B2 (en) | 2004-03-17 | 2007-08-28 | Inventio Ag | Equipment for fine positioning of a car of a multi-stage car |
| US7427062B2 (en) | 2005-10-19 | 2008-09-23 | Samsung Electronics Co., Ltd. | Automatic document feeder and image reading apparatus using the same |
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