JPH0418302B2 - - Google Patents
Info
- Publication number
- JPH0418302B2 JPH0418302B2 JP58200902A JP20090283A JPH0418302B2 JP H0418302 B2 JPH0418302 B2 JP H0418302B2 JP 58200902 A JP58200902 A JP 58200902A JP 20090283 A JP20090283 A JP 20090283A JP H0418302 B2 JPH0418302 B2 JP H0418302B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- spring
- feed roller
- separation
- paper cassette
- 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.)
- Expired - Lifetime
Links
- 238000000926 separation method Methods 0.000 claims description 44
- 244000208734 Pisonia aculeata Species 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6502—Supplying of sheet copy material; Cassettes therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、複写機やレーザビームプリンタなど
の記録装置の給紙装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a paper feeding device for a recording apparatus such as a copying machine or a laser beam printer.
給紙分離のために送りローラーと分離部材を用
いる給紙装置が増えている。これは、従来から使
われてきた紙カセツトに分離爪を用いた方式に比
べ紙分離性能が良いためである。
Paper feeding devices that use a feed roller and a separation member to separate paper feeds are increasing in number. This is because the paper separation performance is better than the conventional method that uses separation claws in the paper cassette.
この送りローラーと分離部材を用いた方式で
は、紙カセツトから給紙ローラーにより用紙が送
りローラーと分離部材の間へと送り込まれる。こ
の時の送りローラーと用紙の間の摩擦係数をμ1、
分離部材と用紙の間の摩擦係数をμ2、そして用紙
と用紙の間の摩擦係数をμ3とするとμ1＞μ2＞μ3が
成り立つ時、送りローラーと分離部材の間に用紙
が複数枚送り込まれていても、送りローラーに接
した１枚の用紙のみが搬送され他の用紙は分離部
材によりその場に止められる。つまりここで給紙
分離が成される事は、一般に知られている。分離
部材は、ローラーの形状をして回転を止められて
いるが、この他にも角形のものやローラー形で回
転可能のものもある。しかし、後者は前記μ2が不
安定となる欠点がある。 In this system using a feed roller and a separation member, paper is fed from a paper cassette to between the feed roller and the separation member by a paper feed roller. The friction coefficient between the feed roller and paper at this time is μ 1 ,
If the coefficient of friction between the separation member and the paper is μ 2 and the coefficient of friction between the paper and the paper is μ 3 , then when μ 1 > μ 2 > μ 3 holds, there are multiple sheets of paper between the feed roller and the separation member. Even if sheets are being fed, only one sheet of paper in contact with the feed roller is conveyed, and the other sheets are stopped in place by the separating member. In other words, it is generally known that paper feed separation occurs here. The separation member is shaped like a roller and is prevented from rotating, but there are also square ones and roller-shaped ones that are rotatable. However, the latter has the drawback that the μ 2 is unstable.
また、用紙に発生する静電気が用紙間の結合力
を強めて分離性能を低下させる為、搬送力を得る
に十分なだけ送りローラーと分離部材間の接触圧
力を強くなければならない。しかし、この圧力が
過大になると、分離部材が用紙を削り紙粉が発生
する為、この圧力は過大となつてもならない。通
常では、この圧力の許容範囲は狭く、安定して作
用させる必要がある。その為分離部材の交換は困
難だつた。 Furthermore, since static electricity generated on the paper strengthens the binding force between the paper sheets and reduces the separation performance, the contact pressure between the feed roller and the separation member must be strong enough to obtain a conveyance force. However, if this pressure becomes excessive, the separation member scrapes the paper and generates paper dust, so this pressure must not become excessive. Normally, this pressure has a narrow tolerance range and must be operated stably. Therefore, it was difficult to replace the separation member.
更に、現在使用されている部材は、長期間摩耗
しない分離部材は得られず、摩擦により表面状態
が変化したり、形状寸法が変化する。その為前記
μ2の送りローラーと分離部材を押し付ける圧力が
変動し、安定した分離性能を長期間維持すること
ができない。 Furthermore, with the members currently in use, it is not possible to obtain a separation member that does not wear out over a long period of time, and the surface condition changes or the shape and dimensions change due to friction. Therefore, the pressure with which the μ 2 feed roller and the separation member are pressed fluctuates, making it impossible to maintain stable separation performance for a long period of time.
更にまた、送りローラーに分離部材が押し付け
られている為、給紙時に分離されて残つた用紙が
紙カセツトを取り外す際に送りローラーと分離部
材の間にはさまれ記録装置内に残つてしまう、紙
残しが発生する欠点がある。 Furthermore, since the separation member is pressed against the feed roller, the remaining paper that is separated during paper feeding may be caught between the feed roller and the separation member when the paper cassette is removed, and remain in the recording device. There is a drawback that paper remains.
本発明の目的は、紙カセツトの取り外し時に記
録装置本体内に用紙が残らず、且つ安定した紙分
離性能を長期間維持できる給紙装置を供給するこ
とである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeding device that does not leave any paper inside the main body of a recording apparatus when a paper cassette is removed and can maintain stable paper separation performance for a long period of time.
本発明は、送りローラーと分離部材を用いた給
紙装置において、分離部材を取り付けた揺動部材
を紙カセツトの装着状態に応じて揺動させて装着
時のみ送りローラーと分離部材を接触させるよう
にすることにより、紙カセツト取り外し時の記録
装置内への紙残しを解消し、且つ給紙装置の紙分
離性能を安定に長期間維持することを可能にし
た。
The present invention provides a paper feeding device using a feed roller and a separating member, in which a swinging member to which a separating member is attached is swung according to the mounting state of a paper cassette, so that the feeding roller and the separating member are brought into contact only when the paper cassette is mounted. By doing so, it is possible to eliminate the problem of paper remaining inside the recording device when the paper cassette is removed, and to maintain the paper separation performance of the paper feeding device stably for a long period of time.
第１図〜第４図は本発明の一実施例を示すもの
で、第１図はレーザビームプリンタの一部縦断側
面図、第２図は分離部材部の斜視図、第３図はそ
の縦断側面図、第４図は分離部材部取り付け斜視
図である。
1 to 4 show an embodiment of the present invention, in which FIG. 1 is a partial vertical cross-sectional side view of a laser beam printer, FIG. 2 is a perspective view of the separating member, and FIG. 3 is a longitudinal cross-sectional view of the laser beam printer. The side view and FIG. 4 are perspective views of the separation member section.
レーザビームプリンタは、第１図に示すよう
に、矢印イ方向に回転する感光ドラム１の表面を
帯電器２によつて一様に帯電し、一様に帯電した
感光ドラム表面をレーザビーム発生器３からのレ
ーザビーム４で露光して電荷潜像を形成し、この
電荷潜像を現像器５で現像して可視像（トナー
像）とする。紙カセツト６ａ，６ｂに収納された
用紙７（第１図では紙カセツト６ａが使用状態に
なつている）を給紙ローラー８ａで引き出し、送
りローラー９ａと分離ローラー１０ａの間を通し
た後に紙搬送路１１を経由して前記感光ドラム１
に接触させ、転写器１２により転写バイアスを与
えて感光ドラム上のトナー像を用紙７に転写す
る。トナー像が転写された用紙７は加熱定着ロー
ラー１３を通過するときに熱定着されて排紙トレ
イ１４に排出される。 As shown in FIG. 1, the laser beam printer uses a charger 2 to uniformly charge the surface of a photosensitive drum 1 rotating in the direction of arrow A, and then transfers the uniformly charged surface of the photosensitive drum to a laser beam generator. A latent charge image is formed by exposure with a laser beam 4 from 3, and this latent charge image is developed by a developing device 5 into a visible image (toner image). Paper 7 stored in paper cassettes 6a and 6b (paper cassette 6a is in use in FIG. 1) is pulled out by paper feed roller 8a, passed between feed roller 9a and separation roller 10a, and then transported. The photosensitive drum 1 is connected to the photosensitive drum 1 via a path 11.
The toner image on the photosensitive drum is transferred onto the paper 7 by applying a transfer bias using the transfer device 12 . The paper 7 on which the toner image has been transferred is thermally fixed when passing through a heat fixing roller 13 and is discharged to a paper discharge tray 14 .
紙カセツト６ｂにも同様のあるいはサイズが異
なる用紙が収納されており、前記紙カセツト６ａ
の場合と同様に給紙ローラー８ｂ、送紙ローラー
９ｂ、分離ローラー１０ｂが対設される。 The paper cassette 6b also stores paper of the same size or different size, and the paper cassette 6a
As in the case of , a paper feed roller 8b, a paper feed roller 9b, and a separation roller 10b are provided opposite to each other.
紙カセツト６ａ，６ｂは必要に応じて選択的に
給紙状態（図示では紙カセツト６ａの状態）に装
着される。 The paper cassettes 6a and 6b are selectively placed in a paper feeding state (in the illustrated state, the paper cassette 6a) as required.
本発明の特徴は、送りローラー９ａ，９ｂに対
応する分離ローラー１０ａ，１０ｂとその保持機
構にある。分離ローラー１０ａとその保持機構の
構成と分離ローラー１０ｂとその保持機構の構成
は同一であるので、以下分離ローラー１０ａとそ
の保持機構を例にとつてその一実施例を説明す
る。 The feature of the present invention lies in the separation rollers 10a, 10b corresponding to the feed rollers 9a, 9b and their holding mechanism. Since the configurations of the separation roller 10a and its holding mechanism are the same as those of the separation roller 10b and its holding mechanism, one embodiment will be described below using the separation roller 10a and its holding mechanism as an example.
第２図〜第４図に示すように、揺動部材１５は
ピン１６とＥリング１７によつて保持部材１８に
揺動自在に取り付けられる。分離ローラー１０ａ
はその端面に四角の係合突起１０ｃが設けられ、
この係合突起１０ｃが前記揺動部材１５に形成さ
れた切欠部１５ａに係合する。揺動部材１５と保
持部材１８の対向面にはバネ座１９，２０が設け
られ、このバネ座１９，２０の間に第１のバネ２
１を圧縮収納して分離ローラー１０ａを送りロー
ラー９ａに圧接する方向（第３図において時計方
向）に揺動部材１５を回動させる。引き戻しピン
２２は保持部材１８に軸方向移動可能に支持さ
れ、第２のバネ２３を圧縮収納することによつ
て、第３図中右方向の推力が与えられる。この引
き戻しピン２２の左端はプラスチツク製ワツシヤ
２４とＥリング２５によつて揺動部材１５に係合
し、揺動部材１５を第１のバネ２１による回動力
に逆つて引き戻す。引き戻しピン２２の右端は紙
カセツト６ａの装着位置まで突出しており、紙カ
セツト６ａが給紙状態に装着されたときに第２の
バネ２３に逆つて押し戻されて揺動部材１５が第
１のバネ２１によつて回動するのを許容する。 As shown in FIGS. 2 to 4, the swinging member 15 is swingably attached to the holding member 18 by a pin 16 and an E-ring 17. Separation roller 10a
is provided with a square engagement protrusion 10c on its end surface,
This engaging protrusion 10c engages with a notch 15a formed in the swinging member 15. Spring seats 19 and 20 are provided on opposing surfaces of the swinging member 15 and the holding member 18, and a first spring 2 is provided between the spring seats 19 and 20.
The swinging member 15 is rotated in a direction (clockwise in FIG. 3) to compress and house the separation roller 10a and press the separation roller 10a against the feed roller 9a. The pull-back pin 22 is supported by the holding member 18 so as to be able to move in the axial direction, and by compressing and storing the second spring 23, a thrust force in the right direction in FIG. 3 is applied. The left end of the pull-back pin 22 engages with the swinging member 15 by a plastic washer 24 and an E-ring 25, and the swinging member 15 is pulled back against the rotational force of the first spring 21. The right end of the pull-back pin 22 protrudes to the mounting position of the paper cassette 6a, and when the paper cassette 6a is mounted in the paper feeding state, it is pushed back against the second spring 23 and the swinging member 15 moves to the first spring. 21 to allow rotation.
そして保持部材１８は、第４図に示すように、
ガイド板２７にネジ２８で取り付けられる。 As shown in FIG. 4, the holding member 18 is
It is attached to the guide plate 27 with screws 28.
以上のような給紙装置によれば、紙カセツト６
ａが非給紙状態に引き出されている場合には、引
き戻しピン２２の右端は自由であるので、引き戻
しピン２２は第２のバネ２３によつて第３図中右
方向に移動している。このため揺動部材１５は第
１のバネ２１に逆つてピン１６を中心に反時計方
向に回動し分離ローラー１０ａを送りローラー９
ａから引き離している。 According to the paper feeding device as described above, the paper cassette 6
When a is pulled out to the non-feeding state, the right end of the pull-back pin 22 is free, so the pull-back pin 22 is moved rightward in FIG. 3 by the second spring 23. Therefore, the swinging member 15 rotates counterclockwise about the pin 16 against the first spring 21 to move the separation roller 10a to the feed roller 9.
It is separated from a.
一方、紙カセツト６ａを使用する場合には、紙
カセツト６ａが第３図に示すように押し込んで装
着される。このとき、紙カセツト６ａの先端が引
き戻しピン２２の右端に当接して該ピンを第２の
バネ２３に逆つて左方向に押し込む。これにより
揺動部材１５は第１のバネ２１によつて時計方向
に回動し、分離ローラー１０ａを送りローラー９
ａに押し付ける。このときの接触圧力はバネ２１
の伸力により決まる。そして、紙カセツト６ａか
ら給紙ローラー８ａによつて繰り出された用紙７
は、もしも重送されていれば送りローラー９ａと
分離ローラー１０ａの間を通過するときに分離さ
れ、上側の一枚のみが紙搬送路１１に送り出され
る。 On the other hand, when using the paper cassette 6a, the paper cassette 6a is inserted by being pushed in as shown in FIG. At this time, the tip of the paper cassette 6a comes into contact with the right end of the pull-back pin 22 and pushes the pin to the left against the second spring 23. As a result, the swinging member 15 is rotated clockwise by the first spring 21, and the separation roller 10a is rotated clockwise by the first spring 21.
Press onto a. The contact pressure at this time is the spring 21
Determined by the elongation force. Then, the paper 7 is fed out from the paper cassette 6a by the paper feed roller 8a.
If the sheets are fed double, they will be separated when they pass between the feed roller 9a and the separation roller 10a, and only the upper sheet will be sent to the paper conveyance path 11.
分離ローラー１０ａが摩耗し摩擦係数が低下し
たときには分離ローラー１０ａを揺動部材１５か
ら引き出し、90度回転させて取り付ければ、再び
元の状態と同じように摩擦係数を回復させること
ができる。 When the separation roller 10a is worn and the coefficient of friction decreases, the separation roller 10a is pulled out from the swinging member 15, rotated 90 degrees, and attached, and the friction coefficient can be restored to the original state.
また紙カセツト６ａを給紙状態から非給紙状態
に引き戻すときは、引き戻しピン２２への紙カセ
ツト６ａによる押し込み力が解除されるので、引
き戻しピン２２はバネ２３によつて右行し、揺動
部材１５がバネ２１によつて反時計方向に回動さ
せられるのを許容する。このために分離ローラー
１０ａは送りローラー９ａから離れ、従つてこの
とき送りローラー９ａと分離ローラー１０ａの間
に挾持されていた用紙７があつても、挾持力は解
除されるので紙カセツト６ａと共に取り出すこと
ができる。 Furthermore, when the paper cassette 6a is pulled back from the paper feeding state to the non-paper feeding state, the pushing force exerted by the paper cassette 6a on the pull-back pin 22 is released, so the pull-back pin 22 moves to the right by the spring 23 and swings. The member 15 is allowed to rotate counterclockwise by the spring 21. For this reason, the separation roller 10a separates from the feed roller 9a, and therefore, even if there is paper 7 that was held between the feed roller 9a and the separation roller 10a at this time, the holding force is released and it is taken out together with the paper cassette 6a. be able to.
以上のように本発明は、分離部材を取り付けた
揺動部材を紙カセツトの装着状態によつて揺動さ
せ、紙カセツトを装着したときには分離部材を送
りローラーに接触させ、紙カセツトを外したとき
には該分離部材を送りローラーから引き離す構成
としたので、紙カセツトを取りだしたときの用紙
残しを解消できる効果がある。
As described above, the present invention allows the swinging member to which the separating member is attached to swing depending on the mounting state of the paper cassette, so that when the paper cassette is mounted, the separating member is brought into contact with the feed roller, and when the paper cassette is removed, Since the separation member is configured to be separated from the feed roller, it is possible to eliminate paper residue when the paper cassette is taken out.
図面は本発明の一実施例を示すもので、第１図
はレーザビームプリンタの一部縦断側面図、第２
図は分離部材部の斜視図、第３図はその縦断側面
図、第４図は分離部材部取り付け斜視図である。
１０ａ……分離ローラー、１５……揺動部材、
１８……保持部材、２１……第１のバネ、２２…
…引き戻しピン、２３……第２のバネ。
The drawings show one embodiment of the present invention, and FIG. 1 is a partially longitudinal side view of a laser beam printer, and FIG.
The figure is a perspective view of the separation member, FIG. 3 is a vertical side view thereof, and FIG. 4 is a perspective view of the separation member. 10a...separation roller, 15...swinging member,
18... Holding member, 21... First spring, 22...
...Pulling back pin, 23...Second spring.
Claims (1)
分離部材１０ａを所定の圧力で接触させ、その間
に用紙を送り込み分離給紙する給紙装置におい
て、 本体に取り付けられる保持部材１８に揺動可能
に取り付けられ前記分離部材を保持する揺動部材
１５と、前記分離部材を前記送りローラーに所定
の圧力で接触させる方向に前記揺動部材に作用し
てこれを揺動する第１のバネ２１と、前記保持部
材に支持されると共に前記揺動部材と係合し、そ
の一部が紙カセツト装着位置に突出する引き戻し
部材２２と、前記第１のバネに逆らつて前記揺動
部材を揺動させ前記分離部材を前記送りローラー
から引き離すように前記引き戻し部材を移動させ
る第２のバネ２３とを備え、 紙カセツトが本体に装着されることによつて紙
カセツト装着位置に突出た前記引き戻し部材が該
紙カセツトにより前記第２のバネに逆らつて移動
されて前記分離部材が前記送りローラーと接触す
るように前記揺動部材が前記第１のバネにより揺
動されることを可能とし、紙カセツトが本体から
外されることにより前記引き戻し部材が前記第２
のバネにより前記第１のバネに逆らつて前記揺動
部材を揺動させて前記分離部材を前記送りローラ
ーから引き離すように移動されることを特徴とす
る給紙装置。[Scope of Claims] 1. In a paper feeding device that brings a separation member 10a into contact with a rotatable feed roller 9a having a drive source under a predetermined pressure, and separates and feeds paper by feeding the paper between them, the holding member 18 is attached to the main body. a swinging member 15 that is swingably attached to and holds the separating member; and a first swinging member that acts on and swings the swinging member in a direction to bring the separating member into contact with the feed roller with a predetermined pressure. a spring 21 supported by the holding member and engaged with the swinging member, a part of which protrudes to the paper cassette mounting position; and a second spring 23 that moves the pull-back member so as to swing the member and separate the separation member from the feed roller, and when the paper cassette is attached to the main body, the paper cassette is projected to the paper cassette attachment position. the swinging member is capable of swinging by the first spring such that the retraction member is moved by the paper cassette against the second spring and the separating member contacts the feed roller; When the paper cassette is removed from the main body, the pull-back member returns to the second position.
A paper feeding device characterized in that the swinging member is swung by a spring against the first spring to move the separation member away from the feed roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58200902A JPS6093465A (en) | 1983-10-28 | 1983-10-28 | Paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58200902A JPS6093465A (en) | 1983-10-28 | 1983-10-28 | Paper feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093465A JPS6093465A (en) | 1985-05-25 |
| JPH0418302B2 true JPH0418302B2 (en) | 1992-03-27 |
Family
ID=16432158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58200902A Granted JPS6093465A (en) | 1983-10-28 | 1983-10-28 | Paper feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093465A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH068966B2 (en) * | 1985-04-30 | 1994-02-02 | 三田工業株式会社 | Electrostatic copying machine |
| JPS63180648U (en) * | 1987-05-15 | 1988-11-22 | ||
| US4904977A (en) * | 1988-06-13 | 1990-02-27 | Mahieu William R | Supersonic expulsion fuse |
| JP2675686B2 (en) * | 1991-04-08 | 1997-11-12 | 株式会社東芝 | Paper feeder |
| JP4920628B2 (en) * | 2008-04-19 | 2012-04-18 | ミネベアモータ株式会社 | motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5778569A (en) * | 1980-11-05 | 1982-05-17 | Ricoh Co Ltd | Sheet transport method of electrophotographic copier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58157337U (en) * | 1982-04-16 | 1983-10-20 | 株式会社リコー | Transfer paper guide device in electrophotographic copying machine |
-
1983
- 1983-10-28 JP JP58200902A patent/JPS6093465A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5778569A (en) * | 1980-11-05 | 1982-05-17 | Ricoh Co Ltd | Sheet transport method of electrophotographic copier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6093465A (en) | 1985-05-25 |
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