JPS62295841A - Sheet material feed device - Google Patents
Sheet material feed deviceInfo
- Publication number
- JPS62295841A JPS62295841A JP61137760A JP13776086A JPS62295841A JP S62295841 A JPS62295841 A JP S62295841A JP 61137760 A JP61137760 A JP 61137760A JP 13776086 A JP13776086 A JP 13776086A JP S62295841 A JPS62295841 A JP S62295841A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- sheet material
- pad
- roller
- fed
- 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
- 239000000463 material Substances 0.000 title claims abstract description 84
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 3
- 230000002079 cooperative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000007799 cork Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/52—Friction retainers acting on under or rear side of article being separated
- B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
- B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
- B65H3/5223—Retainers of the pad-type, e.g. friction pads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper Feeding For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（イ）産業上の利用分野
本発明は、複写機等の画像形成装置において、シート状
原ｆ高、或いはシー！・状被転写材等のシート材を１枚
ずつ給送する装置に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention (a) Field of Industrial Application The present invention is applicable to an image forming apparatus such as a copying machine. This invention relates to a device that feeds sheet materials such as ・shaped transfer materials one by one.
（ロ）従来の技術
複写機等の画像形成装置においては、シート状原稿、或
いはシート状の被転写材等のシート材（以下、シー）・
材という。）を１枚ずつ転写位置へ給送する必要がある
。従来、シート材を自動給送する方式として次のものが
ある。(b) Conventional technology In an image forming apparatus such as a copying machine, a sheet material (hereinafter referred to as a sheet) such as a sheet-like original or a sheet-like transfer material, etc.
It is called wood. ) must be fed to the transfer position one by one. Conventionally, there are the following methods for automatically feeding sheet materials.
予め所定寸法のシート材を積載収納したカセノ）・を複
写機に装着し、複写機内の給送ローラ等の手段によりシ
ート材を１枚ずつ給送するカセット給送方式、複写機上
の、或いは複写機内の積載台上に直接積載したシート材
を給送手段により１枚づつ給送する積載台給送方式等が
ある。特に、後者の方式では数十枚のシート材を直接ｖ
１載台に載置すればよいので、・前者のカセット給送方
式におけろようなカセッ）−の着脱という煩わしさがな
く、シート材給送中でも簡単にシート材の補給ができる
利点がある。A cassette feeding system in which a cassette containing sheet materials of predetermined dimensions is loaded and stored in a copying machine and the sheet materials are fed one by one using means such as a feeding roller inside the copying machine, There is a loading table feeding method in which sheet materials directly stacked on a loading table in a copying machine are fed one by one by a feeding means. In particular, in the latter method, tens of sheets of material can be directly v
Since it only needs to be placed on one loading table, there is no need to worry about attaching and detaching the cassette, which is the case with the former cassette feeding method, and there is an advantage that sheet materials can be easily replenished even while sheet materials are being fed. .
第３図に従来の代表的給送装置の概略構成を示す。給送
ローラ１に対向して、シート材分離部材２が常時給送ロ
ーラ軸心の向けて一定圧力で加圧されるように、スプリ
ング５によって付勢されている。シート材分離部材２の
頂部には、シート材分離パッド３がホルダ６によって取
り付けられている。シート材分離バッド３は、ゴム系の
発泡体、コルクを混入しゴム材、ゴム板等の摩擦弾性材
料からできている。FIG. 3 shows a schematic configuration of a typical conventional feeding device. Opposed to the feed roller 1, the sheet material separating member 2 is urged by a spring 5 so as to be constantly pressed with a constant pressure toward the axis of the feed roller. A sheet material separation pad 3 is attached to the top of the sheet material separation member 2 by a holder 6. The sheet material separation pad 3 is made of a frictional elastic material such as a rubber material mixed with rubber foam or cork, or a rubber plate.
最上のシート材（図示せず）は、給送ローラ１とパッド
３との間で抑圧され、ローラ１とパッド３との協働作用
によって他のシート材から分離されて、給送されるよう
になっている。The uppermost sheet material (not shown) is compressed between the feed roller 1 and the pad 3 and separated from the other sheet materials by the cooperative action of the roller 1 and the pad 3 so that it can be fed. It has become.
Ｇ’→ 発明が解決しようとする問題点しかし、シート
材分離パッド３の表面が平滑すぎると、給送ローラ１と
パッド３との協働作用が十分発揮できず、電送と呼ばれ
ろ多数枚同時給送が起きる。シート材分離パッド３の表
面状態に影響されずに安定した性能を得るには、シート
相分離＠構２の圧接力を強くすればよい。しかし、給送
ローラ１とシート材分離パッド３との間をシートオイが
通過するとき、シート材の表面状態（平滑性）およびシ
ート材放置環境による含水分状態により、シート材分離
機構が微小振動し、シート材の給送時に、不快音（俗に
「鳴き」といっている）が発生する。そのため、シート
材分離機構２の抑圧力は厳密に微調節しておかなければ
ならないという欠点を有していた。この欠点は、シート
材の給送に影響を与えるという不都合もある。G'→ Problems to be Solved by the Invention However, if the surface of the sheet material separation pad 3 is too smooth, the cooperative action between the feeding roller 1 and the pad 3 cannot be sufficiently exerted, which is called electric feeding. Delivery occurs. In order to obtain stable performance without being affected by the surface condition of the sheet material separation pad 3, the pressure contact force of the sheet phase separation@structure 2 may be increased. However, when the sheet oil passes between the feed roller 1 and the sheet material separation pad 3, the sheet material separation mechanism may undergo minute vibrations due to the surface condition (smoothness) of the sheet material and the moisture content caused by the environment in which the sheet material is left. , An unpleasant sound (commonly called "squeal") is generated when the sheet material is fed. Therefore, there was a drawback in that the suppressing force of the sheet material separation mechanism 2 had to be precisely and finely adjusted. This disadvantage also has the disadvantage of affecting the feeding of the sheet material.
本発明の目的は、シート材分離機構の押圧力の微調整を
必要とせずに、シート材の給送を安定かつ確実に行うこ
とのできるシート材給送装置を提供することにある。An object of the present invention is to provide a sheet material feeding device that can feed sheet materials stably and reliably without requiring fine adjustment of the pressing force of a sheet material separation mechanism.
（ロ）問題を解決するための手段
本発明は、シート材を１枚ずつ引き出して給送するシー
ト材給送装置において、シーＩ・相分離機構の頂部に取
り付けたシート材分離バンドの表面に鋸歯状の凹凸部を
設けたことを特徴とする。(b) Means for Solving the Problem The present invention provides a sheet material feeding device that pulls out and feeds sheet materials one by one, in which the surface of the sheet material separation band attached to the top of the sea I/phase separation mechanism is It is characterized by having sawtooth-like uneven parts.
前記凹凸部はシート材給送方向に関して上流側に緩斜面
をまた下流側に急斜面を配置するように形成されて′い
る。The uneven portion is formed such that a gentle slope is arranged on the upstream side and a steep slope is arranged on the downstream side with respect to the sheet material feeding direction.
前記凹凸部のピッチを０３〜１．０ ｍｍとし、また、
高さを０１〜１．０ ＋ｎｍにすることが好ましい。The pitch of the uneven portions is 03 to 1.0 mm, and
Preferably, the height is 01 to 1.0 + nm.
０、） 作用
シート材分離機構は給送ローラに弾性変位自在に押し付
けられている。シー１−材が重送されてきたとき、下側
にあるシー）・材の先端がシート材分離パッドの凹凸部
に食い込／しで、下側のシート材の進行は停止する。上
側のシート材のみが給送ローラによって送り出される。0,) The working sheet material separation mechanism is pressed against the feeding roller so as to be elastically displaceable. When sheet materials are fed in duplicate, the tip of the lower sheet material bites into the uneven portion of the sheet material separation pad, and the advancement of the lower sheet material is stopped. Only the upper sheet material is sent out by the feeding roller.
上側のシー１〜材の給送後、下側のシート材が給送され
る。After the upper sheets 1 to 1 are fed, the lower sheet material is fed.
（へ）実施例
第１図は、本発明にもとづくシート材給送装置におけろ
シート材分離機摺２の頂部部分を示す。(F) Embodiment FIG. 1 shows the top portion of a sheet material separator slide 2 in a sheet material feeding apparatus based on the present invention.
本発明においては、ホルダ６に保持されているシート材
分離パッド３ａの表面に鋸歯状の凹凸部３１が形成され
ている。In the present invention, sawtooth-like uneven portions 31 are formed on the surface of the sheet material separation pad 3a held by the holder 6.
凹凸部３１は、図示するように、シーＩ−材の給送方向
に関して、上流側に緩斜面３１１をまた下流側に３斜面
３１２を配置するように、ホルダ６内に取り付けられろ
。ホルダ６の上流側の上■ｉ６１とパッド３ａの凹凸部
３１の山を連ねた面とは同一平面上にある。一方、ホル
ダ６の下流側の上面６２は、凹凸部３１の谷を連ねた面
と同一平面上にある。すなわら、上面６２と凹凸部３１
の山ｆｅ連ねた面とは段差が生じている。As shown in the figure, the uneven portion 31 is installed in the holder 6 so that a gentle slope 311 is arranged on the upstream side and three slopes 312 are arranged on the downstream side with respect to the feeding direction of the sea material. The upper i61 on the upstream side of the holder 6 and the surface of the concavo-convex portion 31 of the pad 3a are on the same plane. On the other hand, the upper surface 62 on the downstream side of the holder 6 is on the same plane as the surface in which the valleys of the uneven portion 31 are arranged. That is, the upper surface 62 and the uneven portion 31
There is a difference in level from the surface where the mountains fe are connected.
シーＩ・相分離パッド３ａは従来の摩擦弾性材料からで
きている。パッド３ａの凹凸部３１のピッチＰは０．３
〜１．０ ｍｍ １またその高さＤは０１〜１０印程度
が好ましい。The Sea I phase separation pad 3a is made of conventional triboelastic material. The pitch P of the uneven portion 31 of the pad 3a is 0.3.
~1.0 mm 1 Also, the height D is preferably about 01 to 10 marks.
第２図を参照して、本発明のシート材給送装置の動作に
ついて説明する。シート材分離機構２は、前述したスプ
リング５ （第３図）によって力Ｆで給送ローラ１の押
し付けられている。給送ローラ１が時計方向に回転し、
最上にあるシート材７ａを給送方向に引き込んで、シー
）・材７ａをローラ１とパッド３ａとの間に送り込む。The operation of the sheet material feeding device of the present invention will be explained with reference to FIG. The sheet material separation mechanism 2 is pressed against the feeding roller 1 by a force F by the spring 5 (FIG. 3) described above. Feed roller 1 rotates clockwise,
The uppermost sheet material 7a is drawn in the feeding direction, and the sheet material 7a is fed between the roller 1 and the pad 3a.
このとき、最上のシート材７ａの直下にあるシー１〜材
７ｂは、シート材７ａに引きづられて、ローラ１とパッ
ド３ａとの間に送り込まれる。しかし、この重送シート
材７ｂの先端部はパッド３ａの凹凸部３１に当接して進
行が阻止される。At this time, the sheets 1 to 7b located directly below the uppermost sheet material 7a are dragged by the sheet material 7a and sent between the roller 1 and the pad 3a. However, the leading end of the multi-fed sheet material 7b comes into contact with the uneven portion 31 of the pad 3a, and its progress is blocked.
その後、ローラ１が回転を継続してシート材７ａを送り
出しても、重送シート材７ｂは凹凸部３１の障害作用お
よび弾性復帰作用によって、進行が阻止され、シート材
７ａと完全に分離される。After that, even if the roller 1 continues to rotate and sends out the sheet material 7a, the double-fed sheet material 7b is prevented from advancing due to the obstruction action and elastic return action of the uneven portion 31, and is completely separated from the sheet material 7a. .
シート材７ａが完全に送り出された後には、シート材７
ｂの先端部とパッド３ａの凹凸部３１との食い込みが外
れて浮き上がり、ローラ１に直接に接触する。その結果
、シー）・材７ｂが送り出される。After the sheet material 7a is completely fed out, the sheet material 7a
The tip of the pad 3a is removed from the concavo-convex portion 31 of the pad 3a, floats up, and comes into direct contact with the roller 1. As a result, the sheet material 7b is sent out.
以上の動作が順次繰り返されて、シート材が１枚ずつ給
送されろことになる。The above operations are repeated in sequence to feed the sheet materials one by one.
レート材分離バッド３ａの凹凸部３１は、第４図に示す
ように、給送ローラ１とパッド３ａとの接触部分の範囲
にだけ設けても、上述と同様な効果が得られろことが確
認された。It has been confirmed that the same effect as described above can be obtained even if the uneven portion 31 of the plate material separation pad 3a is provided only in the area of contact between the feeding roller 1 and the pad 3a, as shown in FIG. It was done.
（１・）発明の効果
本発明によれば、シート材分離機構の押圧力を厳密に微
Ｕ！Ｊ整する必要なしに、シー１−材の給送を１枚ずつ
安定して確実に行うことができろ。(1.) Effects of the Invention According to the present invention, the pressing force of the sheet material separation mechanism can be strictly reduced to just U! It should be possible to stably and reliably feed sheet materials one by one without the need for alignment.
第１図は本発明にもとづくシート材給送装置におけるシ
ート材分離機構の頂部部分縦断面図。第２図は第１図の
機構の動作説明図。第３図は従来のシート材給送装置の
側面図。第４図は第２図と同様な図面であって、別の実
施例を示す。
１・・給送ローラ 、 ２・・シート材分離機構 、３
．３ａ・・シート材分離部材（パッド） 、５ ・スプ
リング 、 ６・・・ホルダ 、７ａ、７））・・・
シート材 、 ３１・・凹凸部 、６１．６２・・上面
、 ３１１・・・緩斜面 、３１２・・急斜面 。FIG. 1 is a vertical sectional view of a top portion of a sheet material separation mechanism in a sheet material feeding device according to the present invention. FIG. 2 is an explanatory diagram of the operation of the mechanism shown in FIG. 1. FIG. 3 is a side view of a conventional sheet material feeding device. FIG. 4 is a drawing similar to FIG. 2, showing another embodiment. 1. Feeding roller, 2. Sheet material separation mechanism, 3
．． 3a... Sheet material separation member (pad), 5... Spring, 6... Holder, 7a, 7))...
Sheet material, 31...Uneven portion, 61.62...Top surface, 311...Gentle slope, 312...Steep slope.
Claims (3)
し、シート材を１枚ずつ引き出して給送するシート材給
送装置において、 前記分離部材の接触面に鋸歯状の凹凸部を設けたことを
特徴とするシート材給送装置。(1) In a sheet material feeding device that has a feeding means and a separating member that contacts the feeding means and pulls out and feeds sheet materials one by one, the separating member has sawtooth-like irregularities on its contact surface. A sheet material feeding device characterized by having a section.
緩斜面をまた下流側に急斜面を配置するように形成され
ていることを特徴とした特許請求の範囲第１項に記載の
装置。(2) The apparatus according to claim 1, wherein the uneven portion is formed such that a gentle slope is arranged on the upstream side and a steep slope is arranged on the downstream side with respect to the sheet material feeding direction.
また、高さを０．１〜１．０ｍｍにしたことを特徴とし
た特許請求の範囲第１項に記載の装置。(3) The pitch of the uneven portion is 0.3 to 1.0 mm,
The device according to claim 1, further having a height of 0.1 to 1.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61137760A JPS62295841A (en) | 1986-06-13 | 1986-06-13 | Sheet material feed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61137760A JPS62295841A (en) | 1986-06-13 | 1986-06-13 | Sheet material feed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62295841A true JPS62295841A (en) | 1987-12-23 |
Family
ID=15206193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61137760A Pending JPS62295841A (en) | 1986-06-13 | 1986-06-13 | Sheet material feed device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62295841A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01288536A (en) * | 1988-05-16 | 1989-11-20 | Fuji Xerox Co Ltd | Paper feeding device in image forming device |
| US5058877A (en) * | 1989-05-19 | 1991-10-22 | Ricoh Company, Ltd. | Automatic cut-sheet feeding apparatus |
| US5269505A (en) * | 1989-12-26 | 1993-12-14 | Xerox Corporation | Friction retard feeder with a stepped retard pad |
| US5335902A (en) * | 1992-03-13 | 1994-08-09 | Ricoh Company, Ltd. | Sheet feeding device for an image forming apparatus |
| US7798485B2 (en) * | 2007-06-15 | 2010-09-21 | Primax Electronics Ltd. | Document-feeding device with improved sheet-separating structure |
-
1986
- 1986-06-13 JP JP61137760A patent/JPS62295841A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01288536A (en) * | 1988-05-16 | 1989-11-20 | Fuji Xerox Co Ltd | Paper feeding device in image forming device |
| US5058877A (en) * | 1989-05-19 | 1991-10-22 | Ricoh Company, Ltd. | Automatic cut-sheet feeding apparatus |
| US5269505A (en) * | 1989-12-26 | 1993-12-14 | Xerox Corporation | Friction retard feeder with a stepped retard pad |
| US5335902A (en) * | 1992-03-13 | 1994-08-09 | Ricoh Company, Ltd. | Sheet feeding device for an image forming apparatus |
| US7798485B2 (en) * | 2007-06-15 | 2010-09-21 | Primax Electronics Ltd. | Document-feeding device with improved sheet-separating structure |
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