JPS63180638A - Sheet feeder - Google Patents
Sheet feederInfo
- Publication number
- JPS63180638A JPS63180638A JP1211287A JP1211287A JPS63180638A JP S63180638 A JPS63180638 A JP S63180638A JP 1211287 A JP1211287 A JP 1211287A JP 1211287 A JP1211287 A JP 1211287A JP S63180638 A JPS63180638 A JP S63180638A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- supporting member
- sheet feeding
- vibration
- 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
Links
- 239000002783 friction material Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 description 18
- 229920001971 elastomer Polymers 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、複写機、ファクシミリ、レーザービームプリ
ンタ等の画像形成装置（以下複写機という）のシート給
送装置に係り、詳しくはシート給送手段及び摩擦部材を
有する分離手段からなるシート給送装置に関する。Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a sheet feeding device for an image forming apparatus (hereinafter referred to as a copying machine) such as a copying machine, facsimile machine, or laser beam printer. The present invention relates to a sheet feeding device comprising a feeding means and a separating means having a friction member.
（ロ）従来の技術
一般に、複写機はシート給送装置として、摩擦部材とし
ての分離パッドとシート給送手段（以下給紙ローラとい
う）とによりシートを分離・給送する給送装置が用いら
れているが、該給紙ローラと、重送を阻止する該分離パ
ッドだけの摩擦作用であるから、重送を防止するために
は分離パッドの摩擦力を大きくする必要がある。ところ
で、分離パッドの摩擦力を大きくすると、シートを給送
する際に、シートと分離パッドとが摩擦摺動することに
より、シートの振動や鳴きが発生してしまう。特に、Ｏ
ＨＰ （オーバーへラドプロジェクタ）用シートや第２
原図紙等の特殊シートを給送する際に、振動や鳴きの発
生が顕著である。(b) Conventional technology In general, a copying machine uses a sheet feeding device that separates and feeds sheets using a separation pad as a friction member and a sheet feeding means (hereinafter referred to as a paper feeding roller). However, since the frictional effect is only between the paper feed roller and the separation pad that prevents double feeding, it is necessary to increase the frictional force of the separation pad in order to prevent double feeding. By the way, if the frictional force of the separation pad is increased, the sheet and the separation pad will frictionally slide when the sheet is fed, causing vibrations and squeals of the sheet. In particular, O
Sheet for HP (Overhead Projector) and second
When feeding special sheets such as original paper, vibrations and noises are noticeable.
この対策として、シート給送時に、発生する振動を吸振
する防振部材を備えたシート給送装置が案出されており
、該シート給送装置２′は、第３図に示すように、給紙
ローラ１３及び分離パッド１６を有しており、該分離パ
ッド１６は分離手段１５′に固定されて図示しないバネ
等により常時給紙ローラ１３に所定圧力にて圧接して該
給紙ローラ１３と１＠擦接触するように構成されている
。そして、該給紙ローラ１３の軸１３ａには該ローラ１
３を挟んで偶数箇所に防振部材２２′が配設されており
、該防振部材２２′は複写機本体１０に一端を固定され
たバネ２３と、該バネ２３により付勢されて軸１３ａに
当接する当接部材２５とで構成されている。そして、給
紙ローラ１３が回転してシートを給送する際、前記バネ
２３により付勢された当接部材２５が軸１３ｇと当接し
て給紙ローラ１３が振動するのを防止している。As a countermeasure against this problem, a sheet feeding device has been devised that is equipped with a vibration isolating member that absorbs vibrations generated during sheet feeding. It has a paper roller 13 and a separation pad 16, and the separation pad 16 is fixed to the separation means 15' and is constantly pressed against the paper feed roller 13 with a predetermined pressure by a spring or the like (not shown). 1@Constructed to make frictional contact. The roller 1 is attached to the shaft 13a of the paper feed roller 13.
Vibration isolating members 22' are arranged at even-numbered locations across the copying machine body 10, and the vibration isolating members 22' are biased by a spring 23 whose one end is fixed to the copying machine main body 10 and the shaft 13a. and an abutting member 25 that abuts on the abutting member 25. When the paper feed roller 13 rotates to feed a sheet, the contact member 25 biased by the spring 23 contacts the shaft 13g to prevent the paper feed roller 13 from vibrating.
ｃｌ→ 発明が解決しようとする問題点ところで、上述
したシート給送装置２′では、軸１３ａに偶数個の防振
部材２２′を配設しているので装置が大きくなり、また
軸１３ａの剛性を高めなけらばならなかった。更に、防
振部材２２′を偶数個配置するため、該装置２２′の位
置決めが難しいという欠点があった。cl→ Problem to be Solved by the Invention Incidentally, in the sheet feeding device 2' described above, an even number of vibration isolating members 22' are arranged on the shaft 13a, so the device becomes large and the rigidity of the shaft 13a is had to be increased. Furthermore, since an even number of vibration isolating members 22' are arranged, it is difficult to position the device 22'.
（ロ）問題を解決するための手段
本発明は、上述問題点を解消することを目的とするもの
であり、シート給送手段又はシート分離手段に、所定質
量を有しかつ所定量摺動自在に保持されてなる防振部材
を配設することを特徴とするものである。(b) Means for solving the problem The present invention aims to solve the above-mentioned problems, and the present invention has a sheet feeding means or a sheet separating means that has a predetermined mass and is slidable by a predetermined amount. It is characterized by disposing a vibration isolating member which is held by the holder.
（ホ） 作用
上述構成に基づき、シート給送手段と摩擦部材間をシー
トが給送される際に振動が発生するが、所定質量を有す
防振部材が上・下壁と衝突をくり返して前記振動を吸振
する。(E) Effect Based on the above-described configuration, vibration occurs when the sheet is fed between the sheet feeding means and the friction member, but the vibration isolating member having a predetermined mass repeatedly collides with the upper and lower walls. The vibration is absorbed.
（へ）実施例
以下、図面に沿って、本発明の実施例について説明する
。(F) Examples Examples of the present invention will be described below with reference to the drawings.
複写機Ｃは、第４図に示すように、シートＳを積載しか
つ図示しないバネによゆ付勢される中板１ａを有す給紙
１−レイ１及び該トレイ１からシートＳを１枚ずつ分離
・給送するシート給送装置２を有してお９、該シート給
送装Ｍ２の下流には、シートＳを案内するガイド対３及
びシートＳを同期搬送するレジストローラ対５が配設さ
れている。As shown in FIG. 4, the copying machine C includes a paper feeder 1-ray 1, which has an intermediate plate 1a loaded with sheets S and biased by a spring (not shown), and a tray 1 that feeds sheets S from the tray 1. It has a sheet feeding device 2 that separates and feeds sheets one by one 9, and downstream of the sheet feeding device M2, a pair of guides 3 that guides the sheet S and a pair of registration rollers 5 that synchronously conveys the sheet S. It is arranged.
そして、該ローラ対５の下流には、画像を形成する複写
部６、シートＳを搬送する搬送部７及び画像を定着する
定着Ｍ９が配設されており、該定着器９の下流にはシー
トＳを複写機本体１０外の排出トレイ１１上に排出する
排出ローラ対１２が配設されており、更に複写機本体１
０上部には原稿を載置するプラテン２１が配設されてい
る。A copying section 6 for forming an image, a conveying section 7 for conveying the sheet S, and a fixing section M9 for fixing the image are arranged downstream of the roller pair 5. A pair of discharge rollers 12 for discharging S onto a discharge tray 11 outside the copying machine main body 10 is provided, and
A platen 21 on which a document is placed is disposed at the top.
そして、前記シート給送装置２は、第１図に示すように
、軸１３ａ（ζ支持されかつ外周をゴム等の高摩擦材で
構成された給紙ローラ１３及び複写機本体１０（第４図
参照）に支持された軸１５ａを有しており、かっ該軸１
５ａはアルミダイキャストあるいは耐熱樹脂等により構
成された分離手段としての支持部材１５が回転自在に支
持されており、更に該支持部材１５の先端上部にはクロ
ロプレンゴム、ウレタンゴムあるいはアクリルニトリル
ゴム等の高摩擦材で構成された分離パッド１６が固着さ
れている。また、前記支持部材１５の下側には穴１５ｂ
が刻設されており、該穴１５ｂには、前記支持部材１５
を付勢して前記分離パッド１６を前記給紙ローラ１３に
所定圧力にて押圧するバネ１７が配置されている。一方
、前記支持部材１５の先端部にはネジ部１５ｃを有す円
筒状の穴１９が穿設されており、該穴１９には、該穴１
９の全長より雀かに短いｆ４２０が摺動自在に保持され
ており、更に前記ネジ部１５ｃには密閉盃２１が螺合さ
れ、これによりインバク！・ダンパ方式の防振部材２２
が構成されている。As shown in FIG. 1, the sheet feeding device 2 includes a paper feeding roller 13 supported by a shaft 13a (ζ and whose outer periphery is made of a high friction material such as rubber) and a copying machine main body 10 (see FIG. 4). ), the shaft 15a is supported by the shaft 15a
5a, a support member 15 as a separation means made of die-cast aluminum or heat-resistant resin is rotatably supported, and the upper tip of the support member 15 is coated with chloroprene rubber, urethane rubber, acrylonitrile rubber, etc. A separation pad 16 made of a high friction material is fixed. Further, a hole 15b is provided on the lower side of the support member 15.
is engraved in the hole 15b, and the support member 15
A spring 17 is arranged to bias the separation pad 16 against the paper feed roller 13 with a predetermined pressure. On the other hand, a cylindrical hole 19 having a threaded portion 15c is bored at the distal end of the support member 15.
The f420, which is much shorter than the full length of the f420, is slidably held, and a sealing cup 21 is screwed onto the threaded portion 15c.・Damper type vibration isolation member 22
is configured.
本実施例は以上のような構成よりなるので、給紙トレイ
１上に積載されたシートＳは、中板１ａにより上方に付
勢されて給紙ローラ１３へ押圧される。ついで、該給紙
ローラ１３が回転して給紙トレイ１上の最上位のシート
Ｓから給送が開始され、そして給紙ローラ１３と分離パ
ッド１６との間をシートＳが給送される。そして、２枚
以上のシートが給送される重送が生じた場合、下方のシ
ートは分離パッド１６により給送が阻止され、分離され
て上方の１枚だけが給紙ローラ１３により給送されろ。Since the present embodiment has the above-described configuration, the sheets S stacked on the paper feed tray 1 are urged upward by the intermediate plate 1 a and pressed against the paper feed roller 13 . Then, the paper feed roller 13 rotates to start feeding the uppermost sheet S on the paper feed tray 1, and the sheet S is fed between the paper feed roller 13 and the separation pad 16. When double feeding occurs in which two or more sheets are fed, the lower sheet is blocked from being fed by the separation pad 16, separated, and only the upper sheet is fed by the paper feed roller 13. reactor.
この際、シートＳは分離パッド１６と摩擦・摺動するこ
とにより、該分離パッド１６とシートＳとの間で振動が
発生するが、該振動により支持部材１５が下降する時、
錘２０が穴１９の上面に衝突し、また支持部材１５が上
昇する時、錘２０が穴１９の下部の密閉ｉ２１に衝突す
る。At this time, the sheet S rubs and slides against the separation pad 16, causing vibration between the separation pad 16 and the sheet S. When the support member 15 descends due to the vibration,
The weight 20 hits the upper surface of the hole 19, and when the support member 15 rises, the weight 20 hits the seal i21 at the bottom of the hole 19.
このようにして、該錘２０の振動の振幅方向と逆方向の
衝突により振動は減衰され、シートＳはガイド板３に案
内されてレジストローラ対５へ安定して搬送される。つ
いで、該シートＳは、レジストローラ対５により複写部
６の画像と同期して搬−送され、該複写部６により画像
を複写される。そして、該シートＳは、鬼送部７により
定着器９へ搬送され、該定着器９により画像を定置され
る。In this way, the vibration is attenuated by the collision of the weight 20 in the opposite direction to the vibration amplitude direction, and the sheet S is guided by the guide plate 3 and stably conveyed to the registration roller pair 5. Next, the sheet S is conveyed by a pair of registration rollers 5 in synchronization with the image in the copying section 6, and the image is copied by the copying section 6. Then, the sheet S is conveyed to the fixing device 9 by the feeder section 7, and the image is fixed by the fixing device 9.
ついで、該シートＳは排出ローラ１２により複写機本体
１０外の排出トレイ１１上へ排出される。Then, the sheet S is discharged onto a discharge tray 11 outside the copying machine main body 10 by a discharge roller 12.
なお、上述実施例においては防振部材２２としてインパ
クトダンパ方式を用いて説明したが、これに限らず、穴
１９内にオイル等の粘性材を封入したランチェスタダン
パ方式の防振部材を用いてもよい。In the above-mentioned embodiment, an impact damper method was used as the vibration isolating member 22. Good too.
また、上述実施例においては、防振部材２２を１つ配設
していたが、これに限らず防振部材２２を複数として様
々な方向に配設すると、幅広い振動数の振動を防振する
ことができろ。Further, in the above embodiment, one vibration isolating member 22 is provided, but the present invention is not limited to this, and if a plurality of vibration isolating members 22 are provided in various directions, vibrations of a wide range of frequencies can be damped. Be able to do that.
更に、他の実施例として、防振部材を給紙ローラに内蔵
するシート給送装置を第２図に沿って説明する。Further, as another embodiment, a sheet feeding device in which a vibration isolating member is built into a paper feeding roller will be described with reference to FIG.
給紙ローラ１３′はゴム等の高摩擦材により構成された
外周部１３′ａと金属の芯金部と１３′ｂとにより構成
されており、該芯金部１３’ ｂの両端ａ。The paper feed roller 13' is composed of an outer peripheral part 13'a made of a high friction material such as rubber, a metal core part 13'b, and both ends a of the core part 13'b.
ｂには、ネジ部１９′ａを有す穴１９′が穿設されてお
り、またこれら穴１９′の中央Ｃにば該穴１９′から９
０”回転した位置に穴１９′が穿設されている。また、
これら穴１９’、１９’には、該穴よりわずかに短かい
錘２０が嵌合されており、該穴１９′のネジ部１９’ａ
、１９’ａには密閉蓋２１が螺合され、これにより防振
部材２２′が構成されている。A hole 19' having a threaded portion 19'a is bored in b, and a hole 19' having a threaded portion 19'a is formed in the center C of these holes 19'.
A hole 19' is drilled at the position rotated by 0". Also,
A weight 20, which is slightly shorter than the holes, is fitted into these holes 19', 19', and a threaded portion 19'a of the holes 19'.
, 19'a are screwed together with a sealing lid 21, thereby forming a vibration isolating member 22'.
そして、給紙ローラ１３′と分離パッド１６ （第４図
参照）との間をシートＳが給送される際、シートＳが分
離パッド１６とＩＩＦＪ摺動することにより発生する振
動を前記防振部材２２′の振動の振幅方向と逆方向の衝
突により減衰してシートＳを安定して搬送する。When the sheet S is fed between the paper feed roller 13' and the separation pad 16 (see FIG. 4), the vibration that is generated when the sheet S slides on the separation pad 16 is suppressed by the vibration damper. The vibration of the member 22' is attenuated by the collision in the direction opposite to the amplitude direction, and the sheet S is stably conveyed.
（ト）発明の詳細
な説明したように、本発明によると、シート給送手段又
はシート分離手段に、所定質量を有しかつ所定摺動自在
に保持される防振部材を配設したので、シート給送時に
発生する振動を防振部材が吸振して、コンパクトな構成
にて防振することができる。(G) As described in detail, according to the present invention, a vibration isolating member having a predetermined mass and being slidably held in a predetermined manner is disposed on the sheet feeding means or the sheet separating means. The vibration isolating member absorbs vibrations generated during sheet feeding, and vibration can be isolated with a compact configuration.
第１図は本発明に係るシート給送装置を示す図で、［ａ
ｌは斜視図、Ｔｂｌは正面断面図である。また、第２図
は他の実施例を示す図で、（ａ）は正面断面図、ｆｂｌ
はＡ−Ａ断面図、（Ｃ１はＢ−Ｂ断面図である。そして
、第３図は従来例を示す正面図、第４図は本発明を具体
化した画像形成装置を示す正面断面図である。
２．２′・・・シート給送装置 、 １３，１３’・
・シート給送手段 、 １５．１５’・・分離手段
、１５ａ・・支持軸 、 １６・・摩擦部材 、２２
．２２’、２２’・・・防振部材 。FIG. 1 is a diagram showing a sheet feeding device according to the present invention, [a
1 is a perspective view, and Tbl is a front sectional view. Moreover, FIG. 2 is a diagram showing another embodiment, in which (a) is a front sectional view, fbl
(C1 is a sectional view taken along the line B-B. FIG. 3 is a front view showing a conventional example, and FIG. 4 is a front sectional view showing an image forming apparatus embodying the present invention. Yes. 2.2'... Sheet feeding device, 13,13'.
・Sheet feeding means, 15.15'...separation means
, 15a...Support shaft, 16...Friction member, 22
．． 22', 22'... Vibration isolation member.
Claims (5)
持されかつ先端部に摩擦部材を有する分離手段を備え、
該摩擦部材をシート給送手段へ付勢し、該シート給送手
段及び摩擦部材によりシートを１枚ずつ分離・給送する
シート給送装置において、 所定質量を有しかつ所定量摺動自在に保持されてなる防
振部材を有することを特徴とするシート給送装置。(1) comprising a sheet feeding means and a separating means rotatably supported by a support shaft and having a friction member at its tip;
In a sheet feeding device that urges the friction member toward a sheet feeding means and separates and feeds sheets one by one using the sheet feeding means and the friction member, the sheet feeding device has a predetermined mass and is slidable by a predetermined amount. A sheet feeding device characterized by having a vibration isolating member held therein.
の範囲第１項記載のシート給送装置。(2) The sheet feeding device according to claim 1, wherein the vibration isolating member is disposed on the separating means.
許請求の範囲第１項記載のシート搬送装置。(3) The sheet conveying device according to claim 1, wherein the vibration isolating member is disposed on the sheet feeding means.
の範囲第１項ないし第３項のいずれか１項記載のシート
搬送装置。(4) The sheet conveyance device according to any one of claims 1 to 3, wherein the vibration isolating member is an impact damper.
求の範囲第１項ないし第３項のいずれか１項記載のシー
ト搬送装置。(5) The sheet conveyance device according to any one of claims 1 to 3, wherein the vibration isolating member is a Lanchester damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211287A JPS63180638A (en) | 1987-01-20 | 1987-01-20 | Sheet feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1211287A JPS63180638A (en) | 1987-01-20 | 1987-01-20 | Sheet feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63180638A true JPS63180638A (en) | 1988-07-25 |
Family
ID=11796481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1211287A Pending JPS63180638A (en) | 1987-01-20 | 1987-01-20 | Sheet feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63180638A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547747A2 (en) * | 1991-12-17 | 1993-06-23 | Sumitomo Rubber Industries Ltd. | Paper separating member for paper feeding device |
| JP2002356242A (en) * | 2001-05-31 | 2002-12-10 | Canon Inc | Sheet conveying device and image processing device |
| KR100370206B1 (en) * | 1999-12-30 | 2003-01-29 | 삼성전자 주식회사 | Paper pick-up apparatus having frictional pad for printer |
| JP2006062873A (en) * | 2004-07-27 | 2006-03-09 | Canon Inc | Sheet feeder and image forming device |
| JP2009007081A (en) * | 2007-06-26 | 2009-01-15 | Ricoh Co Ltd | Recording medium storage device and image forming device |
| JP2009274836A (en) * | 2008-05-15 | 2009-11-26 | Fuji Xerox Co Ltd | Medium supply device, image forming device and separation member |
| TWI396628B (en) * | 2008-11-26 | 2013-05-21 | Teco Image Sys Co Ltd | Sheet separating device capable of suppressing noise and automatic document feeder and manufacturing method thereof |
| CN106241441A (en) * | 2015-06-12 | 2016-12-21 | 夏普株式会社 | Paper feed and image processing system |
-
1987
- 1987-01-20 JP JP1211287A patent/JPS63180638A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320337A (en) * | 1991-12-17 | 1994-06-14 | Sumitomo Rubber Industries, Ltd. | Paper separating member for paper feeding device |
| EP0547747A3 (en) * | 1991-12-17 | 1994-10-05 | Sumitomo Rubber Ind | Paper separating member for paper feeding device |
| EP0547747A2 (en) * | 1991-12-17 | 1993-06-23 | Sumitomo Rubber Industries Ltd. | Paper separating member for paper feeding device |
| KR100370206B1 (en) * | 1999-12-30 | 2003-01-29 | 삼성전자 주식회사 | Paper pick-up apparatus having frictional pad for printer |
| JP4497751B2 (en) * | 2001-05-31 | 2010-07-07 | キヤノン株式会社 | Sheet conveying apparatus and image processing apparatus |
| JP2002356242A (en) * | 2001-05-31 | 2002-12-10 | Canon Inc | Sheet conveying device and image processing device |
| JP2006062873A (en) * | 2004-07-27 | 2006-03-09 | Canon Inc | Sheet feeder and image forming device |
| JP2009007081A (en) * | 2007-06-26 | 2009-01-15 | Ricoh Co Ltd | Recording medium storage device and image forming device |
| JP2009274836A (en) * | 2008-05-15 | 2009-11-26 | Fuji Xerox Co Ltd | Medium supply device, image forming device and separation member |
| TWI396628B (en) * | 2008-11-26 | 2013-05-21 | Teco Image Sys Co Ltd | Sheet separating device capable of suppressing noise and automatic document feeder and manufacturing method thereof |
| CN106241441A (en) * | 2015-06-12 | 2016-12-21 | 夏普株式会社 | Paper feed and image processing system |
| JP2017001855A (en) * | 2015-06-12 | 2017-01-05 | シャープ株式会社 | Paper feeding device, image reading device and image formation device |
| US9896288B2 (en) | 2015-06-12 | 2018-02-20 | Sharp Kabushiki Kaisha | Paper feed apparatus and image forming apparatus |
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