JPS6363445B2

JPS6363445B2 -

Info

Publication number: JPS6363445B2
Application number: JP56126300A
Authority: JP
Priority date: 1981-08-11
Filing date: 1981-08-11
Publication date: 1988-12-07
Also published as: JPS5826741A

Description

【発明の詳細な説明】〔発明の目的〕（産業上の利用分野）本発明はフアクシミリ送信機や複写機等に原稿
や記録紙等の紙葉を送給する自動給紙装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an automatic paper feeding device for feeding paper sheets such as original documents and recording paper to facsimile transmitters, copying machines, and the like.

（従来の技術）フアクシミリ送信機に使用されている所謂下取
りの自動給紙装置は、第１図に示すようにシート
状の原稿１を載置するための給紙台（原稿台）２
と、この給紙台２の下端部近傍に配され原稿１を
送給するための送りローラ３と、送給すべき原稿
を他の原稿から分離し、且つ他の原稿の送給を阻
止するための逆転ローラ４が送りローラ３と適度
な押圧力で接触するようにアーム５を介してアー
ム支点軸６に回転自在に軸支されている。これら
のローラ３，４は夫々駆動源１０，１１により各
別に駆動されるようになつている。送りローラ３
の後方には送給すべき原稿を搬送するための搬送
ローラ７と、原稿検出器８及び原稿読取りセンサ
９が配置されている。(Prior Art) A so-called trade-in automatic paper feeder used in a facsimile transmitter has a paper feed stand (original stand) 2 on which a sheet-like original 1 is placed, as shown in FIG.
, a feed roller 3 disposed near the lower end of the paper feed tray 2 for feeding the original 1, and a feed roller 3 for separating the original to be fed from other originals and preventing feeding of other originals. A reversing roller 4 is rotatably supported on an arm fulcrum shaft 6 via an arm 5 so as to be in contact with the feed roller 3 with an appropriate pressing force. These rollers 3 and 4 are individually driven by drive sources 10 and 11, respectively. feed roller 3
A conveyance roller 7 for conveying the document to be fed, a document detector 8, and a document reading sensor 9 are arranged behind the document feeder.

給紙台２に載置した原稿１を送給する場合に
は、送りローラ３を第２図の矢印Ａ方向に、逆転
ローラ４を矢印Ｂ方向に回転させる。逆転ローラ
４は送りローラ３と同方向に回転しており、従つ
て、これらのローラ３，４の接触部においては、
逆転ローラ４の回転方向は送りローラ３の回転方
向に対して逆方向となる。また、送りローラ３と
原稿１との接触面の摩擦係数μ₁よりも逆転ローラ
４と原稿１との接触面の摩擦係数μ₂よりも原稿同
志の接触面の摩擦係数μ₃の方が小さく（μ₁＞μ₂＞
μ₃）なるように、各ローラ３，４の摩擦係数が設
定されている。従つて、原稿１は２枚以上同時に
（重なつて）送給されることなく、給紙台２から
最下部の原稿のみが１枚づつ引き出され送給方向
（ローラ７の方向）に送給される。 When feeding the document 1 placed on the paper feed table 2, the feeding roller 3 is rotated in the direction of arrow A in FIG. 2, and the reversing roller 4 is rotated in the direction of arrow B. The reversing roller 4 rotates in the same direction as the feed roller 3, so at the contact area between these rollers 3 and 4,
The rotation direction of the reversing roller 4 is opposite to the rotation direction of the feed roller 3. Furthermore, the friction coefficient μ 3 of the contact surface between the originals is smaller than the friction coefficient μ ₁ of the contact surface between the feed roller 3 and the original 1, and the friction coefficient μ ₂ of the contact surface between the reverse roller ₄ and the original 1. (μ ₁ > μ ₂ >
The coefficient of friction of each roller 3, 4 is set so that μ ₃ ). Therefore, two or more originals 1 are not fed at the same time (overlapping), and only the lowest originals are pulled out one by one from the paper feed table 2 and fed in the feeding direction (direction of the rollers 7). be done.

送りローラ３により送給された原稿１ａは搬送
ローラ７により搬送され、原稿検出器８により原
稿１ａの先端部が検出された後、原稿読取りセン
サ９の原稿読取り走査位置まで搬送され、原稿の
読取り走査が開始されるようになつている。 The original 1a fed by the feed roller 3 is transported by the transport roller 7, and after the leading edge of the original 1a is detected by the original detector 8, it is transported to the original reading scanning position of the original reading sensor 9, and the original is read. The scan is about to begin.

ところで、送給すべき原稿はその正規の搬送方
向に対して傾いて送給されたり、蛇行しながら送
給された場合には、原稿読取り走査位置で正しく
読取り走査が行なわれなくなつたり、送給原稿の
両側面が装置側板に接触して折れ曲がつたり、或
いは破れたりする等のトラブルが生じる。 By the way, if the document to be fed is fed at an angle with respect to its normal feeding direction, or if it is fed in a meandering manner, the reading scan may not be performed correctly at the document reading scanning position, or the document may not be fed properly. Both sides of the fed document come into contact with the side plates of the apparatus, causing problems such as bending or tearing.

そこで、これらのトラブルを防止するために従
来の自動給紙装置では第３図に示すように、給紙
台２の原稿積載面２ａ上に固定ガイド翼１２及び
スライドガイド翼１３を幅方向に対向させて設置
し、原稿を載置する場合、その原稿１の片側面を
固定ガイド翼１２のガイド面１２ａに当接させ、
更にスライドガイド翼１３を移行させてガイド面
１３ａを原稿１の他の側面に当接させて送給する
ようにしていた。従つて、一対のガイド面１２ａ
及び１３ａにより両側部がガイドされた原稿１は
その原稿幅の如何に拘らずガイド面１２ａの位置
が基準となり当接ガイド面１２ａに沿つた方向に
送給され、傾いたり、幅方向にずれたりすること
なく、所定の読取り位置まで搬送される。 Therefore, in order to prevent these troubles, in the conventional automatic paper feeder, as shown in FIG. When installing the document 1 and placing the document, one side of the document 1 is brought into contact with the guide surface 12a of the fixed guide wing 12,
Further, the slide guide blade 13 is moved to bring the guide surface 13a into contact with the other side of the document 1, and the document 1 is fed. Therefore, the pair of guide surfaces 12a
The document 1 whose both sides are guided by the guide surfaces 13a and 13a is fed in the direction along the contact guide surface 12a with the position of the guide surface 12a as a reference regardless of the width of the document, and is not tilted or shifted in the width direction. It is transported to a predetermined reading position without any movement.

（発明が解決しようとする問題点）しかしながら、上記構成においては原稿１を給
紙台２に載置する際、第４図に示すようにスライ
ドガイド翼１３のガイド面１３ａと原稿１の側面
との間が空いている場合には原稿１のガイド面１
３ａ方向（矢印ｃ方向）への倒れを規制すること
ができず、逆転ローラ４と送りローラ３との平行
度の狂い等により送給すべき原稿１ａが傾いた
り、蛇行したりしながら送給されることがあつ
た。それ故、給紙台２上に原稿１を載置する際、
その原稿幅に合わせてその都度スライドガイド翼
１３を調整する必要があり、使い勝手が悪いとい
う欠点があつた。更に、原稿幅の異なる複数枚の
原稿を重ねて給紙台２上に載置した場合、第５図
に示すように原稿幅の短いものはスライドガイド
翼１３に規制されず、傾いたまま送給されてしま
い、このため原稿幅が異なるものを一緒に送給す
ることができないという欠点があつた。(Problems to be Solved by the Invention) However, in the above configuration, when placing the original 1 on the paper feed table 2, as shown in FIG. If there is a gap, guide surface 1 of document 1
It is not possible to prevent the original 1a from falling in the direction 3a (direction of arrow c), and the document 1a to be fed is fed while tilting or meandering due to the misparallelism between the reversing roller 4 and the feed roller 3, etc. There were times when it happened. Therefore, when placing the original 1 on the paper feed tray 2,
It is necessary to adjust the slide guide wings 13 each time according to the width of the document, which has the drawback of being inconvenient to use. Furthermore, when multiple originals with different widths are stacked and placed on the paper feed tray 2, the shorter originals are not regulated by the slide guide wings 13 and are fed tilted, as shown in FIG. Therefore, there was a drawback that documents with different widths could not be fed together.

そこで、本発明の目的は、給紙台上に積載した
紙葉の最下位の紙葉を確実に基準ガイドに添わせ
て送給させることのできる自動給紙装置を提供す
ることにある。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic sheet feeding device that can reliably feed the lowest sheet of sheets stacked on a sheet feeding tray while being aligned with a reference guide.

[Structure of the invention]

（問題点を解決するための手段）本発明の自動給紙装置では、給紙台の基準ガイ
ド面から、給紙台の先端に配設した送りローラの
中央までの距離よりも離れた位置で、給紙台に積
載された紙葉の最上部の紙葉に圧接する押圧手段
を配設し、該押圧手段による負荷と送りローラに
よる紙葉搬送力とによつて給紙台に積載された紙
葉の最下位の紙葉にモーメントを生じさせてい
る。 (Means for Solving the Problems) In the automatic paper feeder of the present invention, a position that is farther from the reference guide surface of the paper feed tray than the center of the feed roller disposed at the tip of the paper feed tray. , a pressing means is provided to press against the topmost sheet of paper stacked on the paper feed tray, and the load from the pressing means and the sheet conveying force of the feed roller cause the sheets to be loaded on the paper feed tray. A moment is generated on the lowest sheet of paper.

（作用）本発明の自動給紙装置では、給紙台に積載され
た紙葉の最上部の紙葉に押圧力を加え、該押圧力
を積載された紙葉を介して最下位の紙葉に作用さ
せる。最下位の紙葉は、送給される際に、送りロ
ーラの搬送力と上記押圧力とによつて生じるモー
メントによつて基準ガイドに当接され、その姿勢
が整えられる。(Function) In the automatic paper feeder of the present invention, a pressing force is applied to the uppermost sheet of sheets stacked on the sheet feed tray, and the pressing force is applied to the lowermost sheet of paper through the stacked sheets. to act on. When the lowest sheet of paper is being fed, it is brought into contact with the reference guide by the moment generated by the conveyance force of the feed roller and the above-mentioned pressing force, and its posture is adjusted.

〔実施例〕第６図及び第７図は本発明の自動給紙装置の要
部説明図で、原稿類を積載するための給紙台２の
下端部近傍位置にはウエイトローラ１４が給紙台
２の積載面２ａと接触するように配置されてお
り、このウエイトローラ１４は、一対のローラア
ーム１５の下端部に回転自在に軸支され、このロ
ーラアーム１５の上端部は固定用の挿入ガイド１
６に回動自在に取り付けられている。そして、こ
のウエイトローラ１４は自重による押圧力で給紙
台２の上面２ａに接触するようになつている。ウ
エイトローラ１４は給紙台２の中央よりもスライ
ドガイド翼１３側に寄つた位置に配されている。
すなわち、固定ガイド翼１２のガイド面１２ａか
ら送りローラ３及び逆転ローラ４の中心位置まで
の距離l₁よりも、固定ガイド１２のガイド面１２
ａからウエイトローラ１４の中心までの距離l₂の
方が大きくなる位置に配置されている。この距離
l₂はウエイトローラ１４の重量等により適宜の値
に設定すればよい。尚、ウエイトローラ１４の位
置は給紙台２の幅方向に移行し得るようにしても
よく。或いは適宜位置に固定するようにしてもよ
い。また、ウエイトローラ１４の給紙との摩擦係
数は送りローラ３と給紙との摩擦係数よりも小さ
い適宜の値に設定されている。[Embodiment] FIGS. 6 and 7 are explanatory diagrams of main parts of an automatic paper feeder of the present invention, in which a weight roller 14 is located near the lower end of a paper feed tray 2 for stacking documents. The weight roller 14 is arranged so as to be in contact with the loading surface 2a of the table 2, and the weight roller 14 is rotatably supported by the lower ends of a pair of roller arms 15, and the upper ends of the roller arms 15 are fixedly inserted. Guide 1
It is rotatably attached to 6. The weight roller 14 is adapted to come into contact with the upper surface 2a of the paper feed table 2 by the pressing force due to its own weight. The weight roller 14 is arranged at a position closer to the slide guide wing 13 than the center of the paper feed table 2.
That is, the guide surface 12 of the fixed guide 12 is smaller than the distance l ₁ from the guide surface 12a of the fixed guide blade 12 to the center position of the feed roller 3 and the reversing roller 4.
It is arranged at a position where the distance l ₂ from a to the center of the weight roller 14 is larger. this distance
_l2 may be set to an appropriate value depending on the weight of the weight roller 14, etc. Incidentally, the position of the weight roller 14 may be made to be able to move in the width direction of the paper feed tray 2. Alternatively, it may be fixed at an appropriate position. Further, the coefficient of friction between the weight roller 14 and the paper feed is set to an appropriate value smaller than the coefficient of friction between the feed roller 3 and the paper feed.

さて、給紙台２上に原稿１を載置すると、この
原稿１は第８図に示すようにウエイトローラ１４
と給紙台２との間に挾まれた形となり、原稿１は
ウエイトローラ１４の自重WRによりほぼ一定の
力FPで給紙台２に垂直に押圧される。送りロー
ラ３及び逆転ローラ４が回転され原稿の送給が開
始されると、第９図に示すように、送給すべき原
稿１ａにはウエイトローラ１４の押圧部において
原稿表面の摩擦係数に応じた摩擦負荷f₂が当該原
稿１ａの送給方向と反対方向に発生する。一方、
この原稿１ａには送りローラ３による搬送力f₁が
加えられる。原稿１ａに作用する搬送力f₁と摩擦
負荷f₂とは相反する方向であり、しかも、これら
の力f₁とf₂との作用線は離隔している。従つて、
原稿１ａには当該原稿１ａを矢印Ｄ方向に回そう
とする偶力が働き、この偶力により原稿１ａの１
側部が固定ガイド翼１２のガイド面１２ａに押付
けられる。従つて、原稿１ａはガイド面１２ａに
押し付けられながら当該ガイド面１２ａに沿つて
真直ぐに搬送される。また、原稿１ａに作用する
負荷WRは原稿１ａの先端を送りローラ４に圧接
させるため、原稿１ａの送給をより確実なものと
している。 Now, when the original 1 is placed on the paper feed table 2, this original 1 is transferred to the weight roller 1 as shown in FIG.
The document 1 is held between the paper feed table 2 and the paper feed table 2, and the document 1 is pressed perpendicularly to the paper feed table 2 by the weight WR of the weight roller 14 with a substantially constant force FP. When the feed roller 3 and the reversing roller 4 are rotated to start feeding the document, as shown in FIG. A frictional load f ₂ is generated in a direction opposite to the feeding direction of the document 1a. on the other hand,
A conveyance force f ₁ by the feed roller 3 is applied to this document 1a. The conveying force f ₁ and the frictional load f ₂ acting on the original 1a are in opposite directions, and the lines of action of these forces f ₁ and f ₂ are separated from each other. Therefore,
A couple acts on the original 1a to turn the original 1a in the direction of arrow D, and this couple causes the original 1a to rotate.
The side portion is pressed against the guide surface 12a of the fixed guide wing 12. Therefore, the original 1a is conveyed straight along the guide surface 12a while being pressed against the guide surface 12a. Furthermore, the load WR acting on the original 1a presses the leading edge of the original 1a against the feed roller 4, thereby making feeding of the original 1a more reliable.

第１０図及び第１１図は本発明の他の実施例を
示す図、第１０図はウエイトローラ１４の代わり
に板バネ等で形成した押圧部材１７の一端部１７
ａを挿入ガイド１６に固定し、他端部１７ｂを給
紙台２の上面２ａに当接させるようにして、バネ
力により原稿面に摩擦負荷（すなわち原稿面に垂
直方向の押圧力）を生じさせるようにしたもので
ある。また、第１１図は挿入ガイド１６に回動自
在に略棒状の押圧部材１８の略中央部を軸支し、
一端部１８ａと挿入ガイド１６間にバネ１９を介
在させ、バネ力により他端部１８ｂを給紙台２の
上面１２ａに押圧当接させ、原稿面に摩擦負荷か
（原稿面に垂直な押圧力）を生じさせるようにし
たものである。尚、原稿面（給紙面）に摩擦負荷
を与える押圧部材１７，１８等の押圧力（バネ
力）は送りローラ３と原稿との摩擦係数に応じて
適宜の値に設定されている。 10 and 11 are views showing other embodiments of the present invention, and FIG. 10 shows one end 17 of a pressing member 17 formed of a plate spring or the like instead of the weight roller 14.
a is fixed to the insertion guide 16, and the other end 17b is brought into contact with the upper surface 2a of the paper feed tray 2, so that a frictional load (that is, a pressing force in a direction perpendicular to the document surface) is generated on the document surface by the spring force. It was designed so that Further, FIG. 11 shows that a substantially central portion of a substantially rod-shaped pressing member 18 is rotatably supported on the insertion guide 16;
A spring 19 is interposed between the one end 18a and the insertion guide 16, and the spring force presses the other end 18b into contact with the upper surface 12a of the paper feed tray 2, causing a frictional load on the document surface (a pressing force perpendicular to the document surface). ). Note that the pressing force (spring force) of the pressing members 17, 18, etc. that apply a frictional load to the document surface (paper feeding surface) is set to an appropriate value depending on the friction coefficient between the feed roller 3 and the document.

〔Effect of the invention〕

以上説明したように本発明によれば、送給され
る紙葉に送給中に絶えず基準となるガイド面に押
し付けられる力が作用しているために、スライド
ガイド翼がなくても紙葉が傾いたり蛇行したりす
ることがなく、また、紙葉載置の際誤つて傾けて
載置した場合でも前記ガイド面に沿つて真直ぐに
送給することができ、スライドガイド翼の調整の
必要がなくなる。また、スライドガイド翼自体を
無くすことにより、その分だけ部品を削減するこ
とができ、より安価且つ使い易くすることができ
る。更に、紙葉幅の異なる複数枚の紙葉を給紙台
上に重ねて載置した場合、或いは紙葉幅の短いも
のでも基準ガイド面に沿つて真直ぐに送給するこ
とができ、種々の大きさの紙葉を一緒に送給する
ことができ極めて能率的であり、しかも原稿を確
実に送給できる等の優れた効果がある。 As explained above, according to the present invention, the force that presses the paper sheet against the reference guide surface is constantly applied to the paper sheet during feeding, so that the paper sheet can be fed even without the slide guide blade. It does not tilt or meander, and even if sheets are placed at an angle by mistake, they can be fed straight along the guide surface, eliminating the need for adjustment of the slide guide blades. It disappears. Furthermore, by eliminating the slide guide blade itself, the number of parts can be reduced accordingly, making it cheaper and easier to use. Furthermore, when multiple sheets of paper with different widths are stacked on the paper feed table, or even sheets with short widths can be fed straight along the reference guide surface, various It is extremely efficient as it can feed paper sheets of various sizes at the same time, and has excellent effects such as being able to feed documents reliably.

[Brief explanation of drawings]

第１図は従来の自動給紙装置の要部説明図、第
２図は第１図の要部拡大説明図、第３図は第１図
の自動給紙装置の斜視図、第４図及び第５図は従
来の自動給紙装置における給紙原稿の傾きを示す
図、第６図は本発明に係る自動給紙装置の一実施
例を示す要部説明図、第７図は第６図の斜視図、
第８図及び第９図は第６図に示す本装置の動作説
明図、第１０図及び第１１図は本発明の自動給紙
装置の他の実施例を示す要部説明図である。１……原稿、２……給紙台、３……送りロー
ラ、４……逆転ローラ、５……アーム、７……搬
送ローラ、８……原稿検出器、９……原稿読取り
センサ、１０，１１……駆動源、１２……固定ガ
イド翼、１３……スライドガイド翼、１４……ウ
エイトローラ、１５……ローラアーム、１６……
挿入ガイド、１７，１８……押圧部材、１９……
バネ。 Fig. 1 is an explanatory diagram of the main parts of a conventional automatic paper feeder, Fig. 2 is an enlarged explanatory diagram of the main parts of Fig. 1, Fig. 3 is a perspective view of the automatic paper feeder shown in Fig. 1, Figs. FIG. 5 is a diagram showing the inclination of a fed document in a conventional automatic paper feeder, FIG. 6 is an explanatory diagram of a main part showing an embodiment of the automatic paper feeder according to the present invention, and FIG. A perspective view of
8 and 9 are explanatory views of the operation of the present apparatus shown in FIG. 6, and FIGS. 10 and 11 are explanatory views of main parts showing other embodiments of the automatic sheet feeding apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Original, 2... Paper feed tray, 3... Feed roller, 4... Reverse roller, 5... Arm, 7... Conveyance roller, 8... Original detector, 9... Original reading sensor, 10 , 11... Drive source, 12... Fixed guide wing, 13... Slide guide wing, 14... Weight roller, 15... Roller arm, 16...
Insertion guide, 17, 18...pressing member, 19...
Spring.

Claims

[Scope of Claims] 1. A paper feeding tray comprising a paper feeding tray 2 having a reference guide surface 12a that regulates the position in the feeding direction and the width direction, and a feeding roller 3 disposed at the tip of the paper feeding tray 2. stand 2
In an automatic paper feeding device that feeds the lowest sheet 1 of sheets 1 stacked on the sheet one by one by the feed roller 3, from the reference guide surface 12a to the feed roller 3.
Pressing means 14, 17, and 18 are arranged to press against the uppermost sheet 1 of the sheets ₁ stacked on the paper feed tray 2 at a position _l2 that is farther from the center than the distance l1, A moment is generated on the lowest sheet 1 of the sheets 1 stacked on the sheet feed tray 2 by the load from the pressing means 14, 17, 18 and the sheet conveyance force from the feed roller 3. An automatic paper feeder that is characterized by: 2. The pressing means has an arm 15 rotatably supported on a fixed member 16, and a weight roller 14 rotatably supported on the arm 15, and the weight roller 14 uses its own weight to rotate in a direction perpendicular to the plane of the paper. An automatic paper feeder according to claim 1, which is adapted to generate a pressing force. 3. The pressing means is such that one end 17a of a plate-like pressing member 17 formed of an elastic member is fixed to the fixed member 16, and the other end 17b is brought into pressing contact with the sheet 1 by elastic force. 2. The automatic paper feeder according to claim 1, which generates a pressing force in a direction perpendicular to the paper surface. 4. The pressing means rotatably supports the substantially center of a substantially rod-shaped pressing member 18, applies a spring force to one end 18a, and uses this spring force to press the other end 18b into contact with the sheet 1. 2. The automatic paper feeder according to claim 1, which is adapted to generate a pressing force in a direction perpendicular to the paper surface.