JPS61254438A - Sheet feeder - Google Patents
Sheet feederInfo
- Publication number
- JPS61254438A JPS61254438A JP9229385A JP9229385A JPS61254438A JP S61254438 A JPS61254438 A JP S61254438A JP 9229385 A JP9229385 A JP 9229385A JP 9229385 A JP9229385 A JP 9229385A JP S61254438 A JPS61254438 A JP S61254438A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- nozzle
- sheets
- airflow
- 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.)
- Granted
Links
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
- B65H3/48—Air blast acting on edges of, or under, articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
Ｌ１上二且皿遣１
本発明は、複写機、ファクシミリ、プリンタ等の画像形
成装置において、多数枚積重ねられた用紙を最上位の用
紙から一枚ずつ送り出すのに用いられる給紙装置に関す
るものである。[Detailed Description of the Invention] L1 Upper 2nd Plate Feeder 1 The present invention is used in an image forming apparatus such as a copying machine, facsimile machine, or printer to feed out a large number of stacked sheets one by one starting from the top sheet. The present invention relates to a paper feeding device.
」米且薯
上記画像形成装置には、画像を形成するための紙または
原稿等の用紙を多数揃えて積層して置き、必要に応じて
最上位の用紙から一枚ずつ順次装置内に送り込む自動給
紙装置が広く用いられているが、従来は最上位の用紙面
に給紙ローラを押付けて摩擦により該用紙を取り出すよ
うにしたものが多かった。しかしこのような給紙装置は
ｌＩ！擦を利用するために、複数枚の用紙が同時に取出
されたリ、用紙が給紙ローうによって汚損されたり、あ
るいは摩擦係数が低下して用紙を取出し損うミスフィー
ドが発生する等の不具合があった。”The above image forming device has an automatic system that stacks a large number of sheets of paper or manuscripts on which images are to be formed, and feeds them into the device one sheet at a time, starting with the topmost sheet of paper, as necessary. Although paper feeding devices are widely used, conventionally most of them have been designed to press a paper feeding roller against the uppermost paper surface and take out the paper by friction. However, such a paper feeding device is lI! Because friction is used, there are problems such as multiple sheets of paper being taken out at the same time, paper being stained by the paper feed row, or misfeeding occurring due to a decrease in the coefficient of friction and failing to take out the paper. there were.
このため、負圧をかけた多数の吸着孔を持つ搬送ベルト
で最上位の用紙を吸着して取出すようにした給紙装置が
提案されており、例えば特開昭５８−２２００３２号公
報にこのような給紙装置が記載されている。この給紙装
置は、用紙（原稿）の堆積の先端付近に開口したエアー
ノズルを設け、該エアーノズルから噴出する空気によっ
てさばいた用紙の最上位の１枚を、前記負圧をかけた多
数の吸着孔を持つ搬送ベルトで吸着して取出す構造とな
っている。For this reason, a paper feeding device has been proposed in which the topmost paper is sucked and taken out using a conveyor belt having a large number of suction holes that apply negative pressure. The following paper feed devices are listed. This paper feeding device is equipped with an air nozzle that opens near the leading edge of a stack of papers (original documents), and uses the air ejected from the air nozzle to feed the topmost sheet of paper into a large number of paper sheets to which the negative pressure is applied. It has a structure in which it is picked up and taken out using a conveyor belt with suction holes.
が ′ し と ρ
しかし、このようにエアーノズルから噴出する空気によ
って用紙をさばくようにした装置においては、気流が最
上位の用紙と２枚目の用紙間に流れ込むだけでなく、そ
の他の用紙間例えば前記２枚目の用紙と３枚目の用紙と
の間にも流れ込んでこれらの用紙を分離させようとし、
しかも最上位の用紙と２枚目の用紙との間の気流が２枚
目と３枚目の用紙間の気流よりも強いという保障はない
ので、２枚目と３枚目の用紙間の分離が最上位と２枚目
の用紙間の分離に比して十分である場合には、最上位の
用紙と２枚目の用紙が同時に送られる重送を生じたり、
あるいは最上位用紙との摩擦力により搬送方向に引きず
られた２枚目の用紙が最上位用の送り出し後ひき続いて
送り出される追込を生じたりするとこがあった。However, in a device like this that uses air ejected from an air nozzle to fan paper, the airflow not only flows between the topmost paper and the second paper, but also spreads between other papers. For example, it flows between the second sheet of paper and the third sheet of paper and tries to separate these sheets,
Moreover, there is no guarantee that the airflow between the top sheet and the second sheet is stronger than the airflow between the second and third sheets, so there is no separation between the second and third sheets. is sufficient compared to the separation between the topmost sheet and the second sheet, a double feed occurs in which the topmost sheet and the second sheet are fed at the same time, or
Alternatively, a second sheet of paper dragged in the conveying direction due to the frictional force with the topmost sheet may be sent out continuously after the topmost sheet has been sent out.
また、最上位用紙との摩擦により僅かに送られた２枚目
の用紙が斜めの位置で停止し、次のサイクルでそのまま
吸引されて送り出されるために斜め送り（スキュー）が
発生することがあった。Additionally, the second sheet of paper that has been slightly fed due to friction with the topmost sheet of paper may stop at an oblique position and be sucked up and sent out in the next cycle, resulting in skew feeding. Ta.
本発明は、用紙さばきを気流によって行い、しかも上記
のような欠点を克服した給紙装置を提供しようとするも
のである。SUMMARY OF THE INVENTION The present invention aims to provide a paper feeding device which handles paper by airflow and which overcomes the above-mentioned drawbacks.
。 た の−このため、本発
明においては、積層された用紙の最上位用紙を吸着面に
吸引可能な位置まで浮揚させる気流を供給する第１のノ
ズル群と、浮揚し前記吸着面に吸引された前記最上位用
紙とその下の用紙との間に両用紙を分離させるための気
流を供給する第２のノズル群とを設ける。これにより、
第１のノズル群からの気流で最上位用紙とその下の用紙
とがともに浮揚したとしても、第２のノズル群からの気
流が最上位用紙とその下の用紙との間に供給されて両用
紙を確実に分離するので、最上位用紙だけが吸着、搬送
される。. Therefore, in the present invention, a first nozzle group that supplies airflow to float the uppermost sheet of the stacked sheets to a position where it can be sucked to the suction surface, and A second nozzle group is provided between the uppermost sheet and the sheet below it for supplying an airflow to separate the uppermost sheets. This results in
Even if the airflow from the first nozzle group causes both the topmost paper and the paper below it to float, the airflow from the second nozzle group is supplied between the topmost paper and the paper below it, causing both of them to float. Since the paper is reliably separated, only the topmost paper is picked up and transported.
さらに本発明においては、吸着面から突出し、該吸着面
に吸着された用紙を部分的にたわませる突起と、用紙搬
送方向前方に設けられ、前記吸着面との間に該吸着面に
吸着された用紙が通過可能な隙間を有する停止爪とを設
ける。従って、たとえ最上位用紙の下の用紙が摩擦によ
って最上位用紙とともに搬送方向に移動することがあっ
ても、これらの用紙が前記突起によってたわむことによ
り両用紙間の先端が開くので、下の用紙は前記停止爪に
突き当ってその位置で停止し、最上位用紙だけが搬送さ
れる。停止爪に突き当って停止した用紙は次の給紙ナイ
クルで吸着されるが、停止爪により案内されて正しい向
きに停止しているので、斜め送りが発生することはない
。Furthermore, in the present invention, a protrusion that protrudes from the suction surface and partially deflects the paper attracted to the suction surface is provided at the front in the paper transport direction, and is provided between the suction surface and the protrusion that partially deflects the paper attracted to the suction surface. A stop pawl is provided with a gap through which the loaded paper can pass. Therefore, even if the paper below the topmost paper moves in the transport direction together with the topmost paper due to friction, the leading edge between the two papers opens as these papers bend by the protrusion, and the paper below hits the stop pawl and stops at that position, and only the topmost sheet is conveyed. The paper that hits the stop pawl and stops is picked up by the next paper feeding unit, but since it is guided by the stop pawl and stopped in the correct direction, skew feeding does not occur.
また。本発明においては、前記吸着面に、前記第２のノ
ズル群から前記最上位用紙の上方に供給される気流を逃
がす溝を形成する。これにより、最上位用紙が、その上
方に第２のノズル群から供給される気流により、吸着面
に対する吸引力を弱められることがない。特に、前記の
ような停止爪が設けられており、かつ用紙が薄紙で腰が
弱い場合には、吸着された最上位用紙の先端部が前記第
２ノズル群からの気流により吸着面から剥離され停止爪
にひっかかって紙語りを生ずる恐れがあるが、上記のよ
うな溝を設けることにより、このような恐れが無くなる
。Also. In the present invention, a groove is formed in the suction surface to allow airflow supplied from the second nozzle group above the uppermost sheet to escape. As a result, the suction force of the uppermost sheet of paper against the suction surface is not weakened by the airflow supplied above it from the second nozzle group. Particularly, when the above-mentioned stop claw is provided and the paper is thin and weak, the leading edge of the topmost paper that has been attracted may be peeled off from the suction surface by the airflow from the second nozzle group. There is a risk that the paper may get caught in the stop pawl and cause the paper to become loose, but by providing the groove as described above, this fear is eliminated.
友ＩＪＩ 以下、本発明を図示の実施例により説明する。Friend IJI Hereinafter, the present invention will be explained with reference to illustrated embodiments.
第１図は本発明の一実施例を示す概略立面図である。１
は給紙トレイで、その上に多数枚の用紙２が積層されて
いる。給紙トレイ１の上方には給紙コンベヤ３が配設さ
れでいる。この給紙コンペヤ３は駆動ローラ４と従動ロ
ーラ５との間に掛渡された搬送ベルト６から成り、搬送
ベルト６には厚み方向に貫通する多数の吸着孔７が設け
られている。そして給紙コンベヤ３の搬送ベルト６によ
って囲まれた内部には、給紙トレイ１側に向って間口し
たバキュームボックス８が配ｌされ、該バキュームボッ
クス８は吸気ダクト９を介してブロワ１０の吸気側に接
続されている。また、吸気ダクト９には前記吸着孔７お
よびバキュームボックス８を通じて空気を吸込むための
吸着バルブ１１と、外部から直接空気を吸込むための吸
気バルブ１２とが設けられている。FIG. 1 is a schematic elevational view showing one embodiment of the present invention. 1
is a paper feed tray, on which many sheets of paper 2 are stacked. A paper feed conveyor 3 is arranged above the paper feed tray 1. This paper feed conveyor 3 consists of a conveyor belt 6 stretched between a driving roller 4 and a driven roller 5, and the conveyor belt 6 is provided with a large number of suction holes 7 passing through it in the thickness direction. Inside the paper feed conveyor 3 surrounded by the conveyor belt 6, a vacuum box 8 with an opening facing the paper feed tray 1 is arranged. connected to the side. Further, the intake duct 9 is provided with a suction valve 11 for sucking air through the suction hole 7 and the vacuum box 8, and an intake valve 12 for sucking air directly from the outside.
ブロワ１０の吐出口は噴気ダクト１３を介してノズルボ
ックス１４に接続されており、該ノズルボックス１４に
は第１ノズル１５と第２ノズル１６とが設けられている
。第１ノズル１５および第２ノズル１６はそれぞれ複数
個群をなして設けられており、第１ノズル１５は、図示
のように、積層された用紙２の最上層部分と同一高さの
位置に、かつ用紙面に平行に指向させて設けられている
。これに対し第２ノズル１６はやや上向きに指向させて
設けられている。A discharge port of the blower 10 is connected to a nozzle box 14 via a jet duct 13, and the nozzle box 14 is provided with a first nozzle 15 and a second nozzle 16. The first nozzle 15 and the second nozzle 16 are each provided in a plurality of groups, and the first nozzle 15 is located at the same height as the top layer of the stacked sheets 2, as shown in the figure. It is also provided so as to be oriented parallel to the paper surface. In contrast, the second nozzle 16 is oriented slightly upward.
１７は用紙２の高さを検知する作動子で、用紙２が数枚
送られて用紙高さが低くなると、これとともに作動子１
７が下降してスイッチ１８をオンさせ、これにより図示
してないモータが回転して給紙トレイ１を上昇させる。Reference numeral 17 is an actuator that detects the height of the paper 2. When several sheets of paper 2 are fed and the paper height becomes low, the actuator 1
7 is lowered to turn on the switch 18, which causes a motor (not shown) to rotate and raise the paper feed tray 1.
したがって積層された用紙２の最上層部分は常に前記第
１ノズル１５とほぼ同一高さに保持される。Therefore, the uppermost layer of the stacked sheets 2 is always held at approximately the same height as the first nozzle 15.
搬送ベルト６は、第３図から分るように、複数個に分割
されて互いに平行にロー５４．５間に掛渡されており、
これらの搬送ベルト６．６・・・の下方走行部分の下面
を運ねる面によって吸着面２１が形成されている。バキ
ュームボックス８の下面は、搬送ベルト６に隣接する部
分だけが開口し、搬送ベルト６相互間に位置する部分は
開口せず、かつこの部分には溝２２が設けられている。As can be seen from FIG. 3, the conveyor belt 6 is divided into a plurality of parts and stretched between the rows 54.5 parallel to each other.
A suction surface 21 is formed by a surface that carries the lower surface of the downward running portion of these conveyor belts 6, 6, . . . . On the lower surface of the vacuum box 8, only the portion adjacent to the conveyor belt 6 is open, and the portion located between the conveyor belts 6 is not open, and a groove 22 is provided in this portion.
換言すれば、前記各搬送ベルトの下面を連ねる吸着面２
１に満２２が形成されている。In other words, the suction surface 2 that connects the lower surface of each of the conveyor belts
1 and 22 are formed.
また、バキュームボックス８に固定された突起２３が相
隣る１組の搬送ベルト６．６間において前記吸着面２１
から下方に突出している。さらに、用紙搬送方向前方に
は、停止爪２４がノズルボックス１４に固定して配設さ
れており、この停止爪２４と吸着面２１との間には該吸
着面に吸着された用紙が通過できる隙間２５が形成され
ている。Further, the protrusion 23 fixed to the vacuum box 8 is arranged between the suction surface 21 and the adjacent pair of conveyor belts 6.6.
It protrudes downward from. Furthermore, a stop claw 24 is fixedly disposed on the nozzle box 14 at the front in the paper conveyance direction, and the paper attracted to the suction surface can pass between the stop claw 24 and the suction surface 21. A gap 25 is formed.
以下、本給紙装置の作動について述べる。先ずスタート
信号により図示してない駆動系とブロワ１０が作動し、
吸気バルブ１２を経て吸気ダクト９に吸込まれた空気が
噴気ダクト１３を通じてノズルボックス１４に供給され
、第１ノズル１５から噴出する気流が前記最上層部分の
用紙２の先端に吹き付けられ、該用紙２の先端が浮揚す
るとともに互いに分離される。次に給紙信号により吸着
バルブ１１が開き（この時吸気ダクト９内の圧力が上昇
すれば吸気バルブ１２が閏じる）、ブロワ１０の吸引力
が吸気ダクト９およびバキュームボックス８を介して吸
着孔７に伝達され、第２図に示すように、浮揚した最上
位用紙２ａを搬送ベルト６上に吸着する。The operation of this paper feeding device will be described below. First, the drive system and blower 10 (not shown) are activated by a start signal.
The air sucked into the intake duct 9 via the intake valve 12 is supplied to the nozzle box 14 through the jet duct 13, and the airflow jetted from the first nozzle 15 is blown onto the leading edge of the paper 2 in the uppermost layer. The tips of the two become levitated and are separated from each other. Next, the suction valve 11 opens in response to the paper feed signal (at this time, if the pressure in the intake duct 9 rises, the intake valve 12 opens), and the suction force of the blower 10 absorbs the paper through the intake duct 9 and the vacuum box 8. The air is transmitted to the hole 7, and as shown in FIG. 2, the floating uppermost sheet 2a is attracted onto the conveyor belt 6.
この状態においては、前記第２ノズル１６から噴出する
気流が最上位用紙２ａと２枚目の用紙２ｂとの間に吹込
まれるので、この気流によって用紙２ａと２ｂは分離さ
れる。なお、最上位用紙２ａには吸着孔７を通じてブロ
ワ１０の強力な吸引力が作用するので、用紙２ａは上記
気流に拘わらず搬送ベルト６に吸着される。吸着バルブ
１１が開いて一定時間経過すると、駆動ローラ４に設け
られたクラッチ（図示していない）が係合し、駆動ロー
ラ４を介して搬送ベルト６が駆動され、これに吸着され
ている最上位用紙２ａは搬送ローラ１９へ送り出される
。そして用紙２ａの先端が７オトセンサ２０で検知され
ると、前記クラッチが離脱して搬送ベルト６が停止する
とともに、吸着バルブ１１が閉じる。これとともに吸気
バルブ１２が吸気ダクト９内外の差圧により開くので、
ノズルボックス１４への空気の供給は継続される。In this state, the airflow ejected from the second nozzle 16 is blown between the uppermost sheet 2a and the second sheet 2b, so that the sheets 2a and 2b are separated by this airflow. Note that, since the strong suction force of the blower 10 acts on the uppermost sheet 2a through the suction hole 7, the sheet 2a is attracted to the conveyor belt 6 regardless of the above-mentioned airflow. When the suction valve 11 is opened and a certain period of time has elapsed, a clutch (not shown) provided on the drive roller 4 is engaged, and the conveyor belt 6 is driven via the drive roller 4, and the most The upper sheet 2a is sent out to the conveyance roller 19. When the leading edge of the paper 2a is detected by the sensor 20, the clutch is disengaged, the conveyor belt 6 is stopped, and the suction valve 11 is closed. At the same time, the intake valve 12 opens due to the pressure difference between the inside and outside of the intake duct 9.
The supply of air to the nozzle box 14 continues.
ところで、最上位用紙２ａと２枚目の用紙２ｂとの分離
が不十分な場合には、最上位用紙２ａとのｆｓ擦力によ
り２枚目の用紙２ｂが搬送方向に移動するが、これらの
用紙２ａ、２ｂは前記突起２３を通過する時その近傍が
該突起２３により押下げられてたわむので、これによっ
て、第２図および第３図に示すように、用紙２ｂはその
先端中央部が最上位用紙２ａから分離して、前方の停止
爪２４に突き当りその位置で停止する。そしてこの用紙
２ｂは次の給紙サイクルで前記最上位用紙２ａと同様に
して吸着搬送される。このようにして用紙の重送、追込
が確実に防止される。また、前記用紙２ｂは停止爪２４
に規制されて搬送方向に関し正しい向きに停止している
ので、次の給紙サイクルにおいてこの用紙２ｂが斜め送
りされることもない。By the way, if the separation between the uppermost sheet 2a and the second sheet 2b is insufficient, the second sheet 2b will move in the transport direction due to the fs friction force with the uppermost sheet 2a. When the sheets 2a and 2b pass through the protrusion 23, the vicinity thereof is pushed down by the protrusion 23 and bends, so that the center of the leading edge of the sheet 2b is bent at the most as shown in FIGS. 2 and 3. It is separated from the upper sheet 2a, hits the front stop claw 24, and stops at that position. Then, in the next paper feeding cycle, this paper 2b is sucked and conveyed in the same manner as the uppermost paper 2a. In this way, double feeding and overlapping of sheets are reliably prevented. Further, the paper 2b is held by the stop claw 24.
Since the paper 2b is stopped in the correct direction with respect to the conveying direction, the paper 2b will not be fed diagonally in the next paper feeding cycle.
なお、特に用紙が薄紙で腰の低い場合には、第２ノズル
１６からの気流により、吸着された最上位用紙２ａの先
端部が吸着面２１から剥離して停止爪２４に引掛かる恐
れがある。このような状態になると、該用紙２ａには吸
着力によって大きな搬送力が与えられているので、結果
として紙詰りを生ずるが、前述のように吸着面２１に溝
２２が設けられており、第２ノズル１６から用紙２ａの
上方に吹込まれる気流があったとしても、この気流はそ
のまま前記溝２２を通じて外部へ逃げ、用紙２ａには力
をおよぼさないので、用紙２ａの先端が剥離して紙詰り
を生ずることはない。また、前記突起２３の両側に生ず
る空隙２６も前記溝２２と同じ働きをする。In addition, especially when the paper is thin and has low stiffness, there is a risk that the leading edge of the topmost paper 2a that has been sucked may peel off from the suction surface 21 and be caught by the stop claw 24 due to the airflow from the second nozzle 16. . In such a state, a large conveying force is applied to the paper 2a due to the suction force, resulting in a paper jam, but as described above, the suction surface 21 is provided with the groove 22, Even if there is an airflow blown above the paper 2a from the two nozzles 16, this airflow escapes to the outside through the groove 22 and does not exert any force on the paper 2a, so that the leading edge of the paper 2a does not peel off. There will be no paper jams. Further, the gaps 26 formed on both sides of the protrusion 23 also function in the same way as the groove 22.
ｌ１立ｌ】
以上の通り、本発明によれば、積層された用紙の最上位
用紙を吸着して搬送する給紙装置において、最上位用紙
がその下の用紙から確実に分離され、該最上位用紙だけ
が吸着搬送されるので、用紙の重送もしくは追込を生ず
る恐れがない。As described above, according to the present invention, in a paper feeding device that adsorbs and conveys the uppermost sheet of stacked sheets, the uppermost sheet is reliably separated from the sheets below it, and the uppermost sheet is Since only the paper is sucked and conveyed, there is no risk of double feeding or overlapping of paper.
また、２枚目の用紙が最上位用紙との摩擦により移動す
ることがあっても、この２枚目の用紙は確実に停止され
、しかもこの用紙が次の給紙サイクルにおいて斜め送り
になることはない。Also, even if the second sheet of paper moves due to friction with the topmost sheet, this second sheet of paper will be reliably stopped, and furthermore, this sheet of paper will be fed diagonally in the next paper feed cycle. There isn't.
さらに、用紙が薄く、腰の弱いものであっても、吸着さ
れた用紙先端が吸着面から剥離して紙詰りの原因となる
ようなことがない。Furthermore, even if the paper is thin and weak, the leading edge of the suctioned paper will not peel off from the suction surface and cause a paper jam.
第１図は本発明の一実施例を示す概略立面図、第２図は
同大輪例の作動状態を示す同様な図面、第３図は第２図
を左方から見た要部正面図である。
１・・・給紙トレイ、２・・・用紙、３・・・給紙コン
ベヤ、４・・・駆動ローン、５・・・従動ローラ、６・
・・搬送ベルト、７・・・吸着孔、８・・・バキューム
ボックス、９・・・吸気ダクト、１０・・・ブロワ、１
１・・・吸着パルプ、１２・・・吸気バルブ、１３・・
・噴気ダクト、１４・・・ノズルボックス、１５・・・
第１ノズル、１６・・・第２ノズル、１１・・・作動子
、１８・・・スイッチ、１９・・・搬送ローラ、２０・
・・フォトセンサ、２１・・・吸着面、２２・・・溝、
２３・・・突起、２４・・・停止爪、２５・・・隙間、
２６・・・空隙。Fig. 1 is a schematic elevational view showing one embodiment of the present invention, Fig. 2 is a similar drawing showing the operating state of the same large-wheeled example, and Fig. 3 is a front view of the main parts of Fig. 2 seen from the left. It is. DESCRIPTION OF SYMBOLS 1... Paper feed tray, 2... Paper, 3... Paper feed conveyor, 4... Drive roller, 5... Followed roller, 6...
...Transport belt, 7...Suction hole, 8...Vacuum box, 9...Intake duct, 10...Blower, 1
1... Adsorption pulp, 12... Intake valve, 13...
・Fume duct, 14... Nozzle box, 15...
1st nozzle, 16... 2nd nozzle, 11... actuator, 18... switch, 19... conveyance roller, 20...
...Photo sensor, 21...Adsorption surface, 22...Groove,
23...Protrusion, 24...Stop claw, 25...Gap,
26...Void.
Claims (2)
給紙装置において、前記積層された用紙の最上位用紙を
吸着面に吸引可能な位置まで浮揚させる気流を供給する
第１のノズル群と、浮揚し前記吸着面に吸引された前記
最上位用紙とその下の用紙との間に両用紙を分離させる
ための気流を供給する第２のノズル群と、前記吸着面か
ら突出し該吸着面に吸着された用紙を部分的にたわませ
る突起と、用紙搬送方向前方に設けられ前記吸着面との
間に該吸着面に吸着された用紙が通過可能な隙間を有す
る停止爪とを備えたことを特徴とする給紙装置。(1) In a paper feeding device that sucks and conveys the topmost sheet of stacked sheets, a first nozzle that supplies an airflow that lifts the topmost sheet of the stacked sheets to a position where it can be sucked onto the suction surface. a second nozzle group that supplies an airflow between the uppermost sheet of paper that has been floated and attracted to the suction surface and the sheet below it to separate both sheets; The apparatus includes a protrusion that partially bends the paper sucked to the surface, and a stop claw provided at the front in the paper transport direction and having a gap between the suction surface and the suction surface through which the paper suctioned to the suction surface can pass. A paper feeding device characterized by:
給紙装置において、前記積層された用紙の最上位用紙を
吸着面に吸引可能な位置まで浮揚させる気流を供給する
第１のノズル群と、浮揚し前記吸着面に吸引された前記
最上位用紙とその下の用紙との間に両用紙を分離させる
ための気流を供給する第２のノズル群とを備え、かつ前
記吸着面に、前記第２のノズル群から前記最上位用紙の
上方に供給される気流を逃がす溝を形成したことを特徴
とする給紙装置。(2) In a paper feed device that sucks and conveys the topmost sheet of stacked sheets, a first nozzle that supplies an airflow that lifts the topmost sheet of the stacked sheets to a position where it can be sucked onto the suction surface. and a second nozzle group that supplies an airflow between the uppermost sheet of paper that is floated and attracted to the suction surface and the sheet below it to separate both sheets, and . A paper feeding device, characterized in that a groove is formed to release an airflow supplied from the second nozzle group above the uppermost sheet of paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9229385A JPS61254438A (en) | 1985-05-01 | 1985-05-01 | Sheet feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9229385A JPS61254438A (en) | 1985-05-01 | 1985-05-01 | Sheet feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61254438A true JPS61254438A (en) | 1986-11-12 |
| JPH0253338B2 JPH0253338B2 (en) | 1990-11-16 |
Family
ID=14050368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9229385A Granted JPS61254438A (en) | 1985-05-01 | 1985-05-01 | Sheet feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61254438A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411533A2 (en) * | 1989-07-31 | 1991-02-06 | Sharp Kabushiki Kaisha | Recirculating sheet feeding apparatus |
| US5150892A (en) * | 1990-03-30 | 1992-09-29 | Minolta Camera Kabushiki Kaisha | Sheet feeding apparatus |
| US5181710A (en) * | 1990-03-20 | 1993-01-26 | Sharp Kabushiki Kaisha | Top sheet feeding apparatus |
| US5184812A (en) * | 1990-05-09 | 1993-02-09 | Sharp Kabushiki Kaisha | Sheet feeding apparatus capable of feeding sheets of plural sizes |
| JPH06227692A (en) * | 1993-02-03 | 1994-08-16 | Hitachi Ltd | Laminated plate type article separation carrier device |
| JPH0733272A (en) * | 1993-04-07 | 1995-02-03 | Christian-P Bourg | Paginating device |
| US6595511B2 (en) | 1999-06-28 | 2003-07-22 | Kyocera Mita Corporation | Paper feeder |
| KR100478335B1 (en) * | 1996-04-09 | 2005-08-23 | 오세-테크놀로지스 베파우 | Top Sheet Separation Transfer Device of Sheet Laminate |
| JP2011162321A (en) * | 2010-02-10 | 2011-08-25 | Ricoh Co Ltd | Feeding device and image forming apparatus |
| US8042798B2 (en) | 2008-11-27 | 2011-10-25 | Konica Minolta Business Technologies, Inc. | Sheet supply apparatus, sheet supply unit and image forming apparatus with blasting separation air outlet |
| US10384891B2 (en) | 2016-11-30 | 2019-08-20 | Konica Minolta, Inc. | Paper feed apparatus and paper feed unit |
-
1985
- 1985-05-01 JP JP9229385A patent/JPS61254438A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411533A2 (en) * | 1989-07-31 | 1991-02-06 | Sharp Kabushiki Kaisha | Recirculating sheet feeding apparatus |
| US5181710A (en) * | 1990-03-20 | 1993-01-26 | Sharp Kabushiki Kaisha | Top sheet feeding apparatus |
| US5150892A (en) * | 1990-03-30 | 1992-09-29 | Minolta Camera Kabushiki Kaisha | Sheet feeding apparatus |
| US5184812A (en) * | 1990-05-09 | 1993-02-09 | Sharp Kabushiki Kaisha | Sheet feeding apparatus capable of feeding sheets of plural sizes |
| JPH06227692A (en) * | 1993-02-03 | 1994-08-16 | Hitachi Ltd | Laminated plate type article separation carrier device |
| JPH0733272A (en) * | 1993-04-07 | 1995-02-03 | Christian-P Bourg | Paginating device |
| KR100478335B1 (en) * | 1996-04-09 | 2005-08-23 | 오세-테크놀로지스 베파우 | Top Sheet Separation Transfer Device of Sheet Laminate |
| US6595511B2 (en) | 1999-06-28 | 2003-07-22 | Kyocera Mita Corporation | Paper feeder |
| US8042798B2 (en) | 2008-11-27 | 2011-10-25 | Konica Minolta Business Technologies, Inc. | Sheet supply apparatus, sheet supply unit and image forming apparatus with blasting separation air outlet |
| JP2011162321A (en) * | 2010-02-10 | 2011-08-25 | Ricoh Co Ltd | Feeding device and image forming apparatus |
| US8814159B2 (en) | 2010-02-10 | 2014-08-26 | Ricoh Company, Limited | Feeding device and image forming apparatus |
| US10384891B2 (en) | 2016-11-30 | 2019-08-20 | Konica Minolta, Inc. | Paper feed apparatus and paper feed unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0253338B2 (en) | 1990-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4835489B2 (en) | Paper feeding device and image forming apparatus | |
| JP3097889B2 (en) | Sheet feeding apparatus and image forming apparatus | |
| JP4866300B2 (en) | Paper feeding device and electrophotographic device | |
| JPH0336750B2 (en) | ||
| JP2890674B2 (en) | Paper feeder | |
| JPS61254438A (en) | Sheet feeder | |
| JP2788382B2 (en) | Paper feeder | |
| EP0185508B1 (en) | A bottom sheet separator/feeder | |
| US4768769A (en) | Low cost rear air knife top vacuum corrugation feeder | |
| JPH057291B2 (en) | ||
| JPS61254439A (en) | Sheet feeder | |
| JP2005001838A (en) | Paper sheet take-out device and paper sheet take-out method | |
| EP3628613B1 (en) | Sheet feeding device, image forming apparatus incorporating the sheet feeding device, and image forming system incorporating the sheet feeding device | |
| JP3706277B2 (en) | Paper feeder | |
| JPH034463B2 (en) | ||
| JP3710255B2 (en) | Air separation paper feeder | |
| CN212831714U (en) | Sheet feeding device | |
| JPH0521808B2 (en) | ||
| JPH0355551Y2 (en) | ||
| JP2011219232A (en) | Paper feeding device, image forming device, image forming system | |
| JPS58220032A (en) | Automatic document feeder | |
| JP2001206573A (en) | Paper feeder | |
| JP2001019187A (en) | Paper feeder | |
| JPS61243743A (en) | Paper feed tray for air system feeder | |
| JPH0379567A (en) | Automatic feeding device for original |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |