JP2555630B2 - Automatic paper feeder - Google Patents

Automatic paper feeder

Info

Publication number
JP2555630B2
JP2555630B2 JP62231535A JP23153587A JP2555630B2 JP 2555630 B2 JP2555630 B2 JP 2555630B2 JP 62231535 A JP62231535 A JP 62231535A JP 23153587 A JP23153587 A JP 23153587A JP 2555630 B2 JP2555630 B2 JP 2555630B2
Authority
JP
Japan
Prior art keywords
paper feed
roller
sheet feeding
drive motor
auxiliary roller
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 - Fee Related
Application number
JP62231535A
Other languages
Japanese (ja)
Other versions
JPS6472872A (en
Inventor
浩史 田淵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62231535A priority Critical patent/JP2555630B2/en
Publication of JPS6472872A publication Critical patent/JPS6472872A/en
Application granted granted Critical
Publication of JP2555630B2 publication Critical patent/JP2555630B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フアクシミリ等に用いられ、原稿台上に
積層された複数枚の原稿を一枚づつ分離して給紙する自
動給紙装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sheet feeder used for facsimile machines and the like, which separates and feeds a plurality of originals stacked on an original table one by one. .

〔従来の技術〕[Conventional technology]

現在のフアクシミリにおいてはその操作性向上の要求
から原稿等の自動給紙機能は標準的に装備されている。
Due to the demand for improved operability, the current fax machine is equipped with a standard automatic paper feed function for documents and the like.

以下に従来の自動給紙装置について説明する。第2図
は従来の自動給紙装置の概略側面図であり、図において
(1)は原稿、(2)は原稿(1)を積層保持する原稿
台、(3)は原稿台(2)の端部に設けられ、矢線A方
向に回転駆動する給紙ローラ、(4)は給紙ローラ
(3)の回転軸、(5)はゴム等の材質から成る分離
片、(6)は給紙ローラ(3)に分離片(5)を押圧す
るバネ等の材質から成る押圧片である。(7)は原稿
(1)の下に積層された第2枚目以降の原稿、(8)は
給紙ローラ(3)の上流部に設けられ、矢線D方向に回
転自在な給紙補助ローラ、(9)は給紙補助ローラ
(8)の回転軸、(10)は給紙補助ローラ(8)を支え
るフレーム、(11),(12)は、フレーム(10)と一体
的に形成された側板、(13)は固定されたアーム金具、
(14)は上記アーム金具(13)と一体的に形成された側
板、(15)はフレーム(10)の側板(12)と開孔とアー
ム金具(13)の側板(14)の開孔とに滑合するシヤフト
であり、このシヤフト(15)を支点として給紙補助ロー
ラ(8)は上下方向に移動可能に構成されている。
The conventional automatic paper feeder will be described below. FIG. 2 is a schematic side view of a conventional automatic paper feeder. In the figure, (1) is a document, (2) is a document table for stacking and holding the documents (1), and (3) is a document table (2). A sheet feeding roller provided at an end portion and driven to rotate in the direction of arrow A, (4) a rotation shaft of the sheet feeding roller (3), (5) a separating piece made of a material such as rubber, and (6) a sheet feeding roller. A pressing piece made of a material such as a spring for pressing the separating piece (5) against the paper roller (3). (7) is the second and subsequent originals stacked below the original (1), and (8) is an upstream paper feed roller (3) that is rotatable in the direction of arrow D. Rollers, (9) is a rotation axis of the paper feed auxiliary roller (8), (10) is a frame supporting the paper feed auxiliary roller (8), and (11) and (12) are integrally formed with the frame (10). Side plate, (13) fixed arm bracket,
(14) is a side plate integrally formed with the arm fitting (13), (15) is a side plate (12) of the frame (10) and an opening, and a side plate (14) of the arm fitting (13) is an opening. The paper feed auxiliary roller (8) is configured to be movable in the vertical direction with the shaft (15) as a fulcrum.

また、(C)は、給紙補助ローラ(8)が、原稿
(1)を押圧する力を示し、(16)は前記原稿台(2)
上の原稿(1)の有無を検出する検出器である。
Further, (C) shows the force with which the paper feed auxiliary roller (8) presses the original (1), and (16) shows the original table (2).
A detector for detecting the presence or absence of the upper original (1).

次に動作について説明する。検出器(16)に原稿
(1)が検出され、給紙ローラ(3)が矢線A方向に回
転すると、最上層の原稿(1)は、摩擦力によつて給紙
ローラ(3)の回転と同時に給紙される。給紙される原
稿(1)により給紙補助ローラ(8)は自重(C)によ
り原稿(1)を押圧しながら矢線D方向にスムーズに回
転する。この場合、給紙補助ローラ(8)は原稿給紙方
向(矢線B)に沿つてのみ回転する構造となつているた
め、斜行の原因となる原稿給紙方向と直交する力に対し
ては、給紙補助ローラ(8)の自重(C)により発生す
る摩擦力によつて上記力を阻止し、原稿(1)の斜行を
防止することができる。
Next, the operation will be described. When the document (1) is detected by the detector (16) and the paper feed roller (3) is rotated in the direction of arrow A, the uppermost document (1) is moved by the frictional force of the paper feed roller (3). Paper is fed at the same time as it is rotated. The document (1) to be fed causes the feed assist roller (8) to rotate smoothly in the direction of arrow D while pressing the document (1) by its own weight (C). In this case, since the paper feed auxiliary roller (8) has a structure that rotates only along the document feed direction (arrow B), it is against the force orthogonal to the document feed direction that causes skew. Can prevent the above-mentioned force by the frictional force generated by the own weight (C) of the sheet feeding auxiliary roller (8) and prevent the document (1) from skewing.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

従来の自動給紙装置は以上のように構成されているの
で、原稿(1)が薄くてこしの弱い紙である場合に、原
稿(1)には、給紙補助ローラ(8)の自重(C)にう
ちかつてこれを押上げるたけの力がなく先端の給紙ロー
ラ(3)方向への進入が妨げられ給紙されないという問
題点があつた。
Since the conventional automatic paper feeder is configured as described above, when the original (1) is a thin and weakly strained paper, the original (1) has its own weight of the paper feed auxiliary roller (8). In the case of C), there is a problem in that the paper cannot be fed because there is no force to push it up and the front end is prevented from approaching the paper feed roller (3).

本発明は上記のような問題点を解消するためになされ
たもので、薄くてこしの弱い原稿においても、給紙不良
のない自動給紙装置を提供することを目的とする。
The present invention has been made to solve the above problems, and an object of the present invention is to provide an automatic paper feeding device that does not have a paper feeding failure even for a thin and weakly-originated document.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る自動給紙装置は、給紙ローラより駆動
力を得て給紙方向に回転駆動される給紙補助ローラと、
給紙ローラに回転駆動力を伝達するバツクラツシの大き
い歯車列と上記給紙補助ローラを原稿台上に積載された
複数枚の原稿を最上面に圧接する付勢手段とを設けえた
ものである。
An automatic sheet feeding device according to the present invention includes a sheet feeding auxiliary roller that is driven to rotate in a sheet feeding direction by obtaining driving force from a sheet feeding roller,
A gear train having a large backlash for transmitting the rotational driving force to the paper feed roller and a biasing means for pressing the plurality of originals stacked on the original table to the uppermost surface of the paper feed auxiliary roller are provided.

〔作用〕 この発明における給紙補助ローラは、給送されるべき
原稿がなくなつたことを原稿通路に設けた検出器で検出
し、駆動モータを一定量逆転させ、給紙補助ローラを持
ち上げ、原稿台と、給紙補助ローラ間に一定の間隔を有
することによつて上述の目的を達成せんとするものであ
る。
[Operation] The paper feed auxiliary roller according to the present invention detects that the original to be fed is exhausted by the detector provided in the original passage, reverses the drive motor by a certain amount, and lifts the paper feed auxiliary roller. The object described above is achieved by providing a fixed space between the document table and the paper feed auxiliary roller.

〔発明の実施例〕Example of Invention

以下、この発明の一実施例を図について説明する。第
1図において、従来と同一部材には同一符号を付してい
る。(17)は回転軸(4)に回転自在に支持され、給紙
補助ローラ(8)を支えるブラケツト、(18)は、給紙
ローラ(3)の駆動力を給紙補助ローラに伝達する駆動
ローラ、(19)はブラケツト(17)に取付けられ、矢線
(E)なる力を発生させる板バネ、(20)は板バネ(1
9)に取付けられ、フエルト等の材質からなり、回転軸
(4)に押圧される押圧片、(21)は片方をブラケツト
(17)に取付けられ、他端を本体に固定され矢線(F)
なる力を発生させるコイルバネ、(22)は給紙ローラ
(3)を駆動する駆動モータ、(23)は駆動モータ(2
2)の回転駆動力を給紙ローラ(3)に伝達するバツク
ラツシの大きい歯車列、(24)は待機時の原稿台(2)
と給紙補助ローラ(8)との間隔である。
An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same members as those in the related art are designated by the same reference numerals. (17) is a bracket that is rotatably supported by the rotary shaft (4) and supports the paper feed auxiliary roller (8), and (18) is a drive that transmits the driving force of the paper feed roller (3) to the paper feed auxiliary roller. A roller, (19) is a leaf spring attached to the bracket (17) and generates a force indicated by an arrow (E), and (20) is a leaf spring (1).
The pressing piece (21), which is attached to (9) and is made of a material such as felt, and which is pressed against the rotary shaft (4), has one end attached to the bracket (17) and the other end fixed to the main body by an arrow (F). )
A coil spring that generates a force, (22) a drive motor that drives the paper feed roller (3), and (23) a drive motor (2
A gear train with a large backlash that transmits the rotational driving force of 2) to the paper feed roller (3), and (24) is the original platen (2) in standby mode.
And the sheet feeding auxiliary roller (8).

上記のように構成された本実施例の自動給紙装置につ
いて、以下にその動作を説明する。まず、検出器(16)
により、原稿(1)が“有”と検出されると、駆動モー
タ(22)を矢線(G)方向に回転し、歯車列(23)を介
して回転軸(4)と給紙ローラ(3)が回転駆動され
る。給紙ローラ(3)が回転すると、駆動ローラ(18)
を介して給紙ローラ(8)も回転し、さらに板バネ(1
9)で発生する押圧力(E)により押圧片(20)と回転
軸(4)間に摩擦力を生じ、給紙補助ローラ(8)は
(8b)位置に移動する。給紙補助ローラ(8)の押圧力
(G)は、{給紙補助ローラ(8)の自重(C)}+
(上記摩擦によるもの)−{コイルバネ(21)による力
(F)}となる、給紙補助ローラ(8)の押圧力(G)
により最上層の原稿(1)に押圧されると同時に、最上
層の原稿(1)は給紙される。
The operation of the automatic sheet feeder of the present embodiment having the above-described structure will be described below. First, the detector (16)
When the document (1) is detected to be "present", the drive motor (22) is rotated in the arrow (G) direction, and the rotation shaft (4) and the paper feed roller ( 3) is rotationally driven. When the paper feed roller (3) rotates, the drive roller (18)
The paper feed roller (8) also rotates via the
The pressing force (E) generated in 9) causes a frictional force between the pressing piece (20) and the rotating shaft (4), and the paper feed auxiliary roller (8) moves to the (8b) position. The pressing force (G) of the paper feed auxiliary roller (8) is {the own weight (C) of the paper feed auxiliary roller (8)} +
(Due to the above friction)-{force (F) by coil spring (21)}, pressing force (G) of the paper feed auxiliary roller (8)
Thus, the uppermost original (1) is pressed, and at the same time, the uppermost original (1) is fed.

次に、検出器(16)により、原稿(1)が“無”と検
出されると、駆動モータ(22)は矢線(H)方向に歯車
列(23)に設けられたバックラッシ相当分だけ回転駆動
される。これにより歯車列(23)にはバックラッシ、即
ち遊びが生じる。そして、コイルバネ(21)による力
(F)によって、ブラケット(17)、板バネ(19)、押
圧片(20)を介して回転軸(4)がバックラッシ相当分
だけ回転されると、給紙補助ローラ(8)は元の位置に
復帰する。このように、原稿台(2)と給紙補助ローラ
(8)との間に設ける間隔に合わせて歯車列(23)に上
記間隔分のバックラッシを設けておけば、検出器(16)
によって原稿(1)が“無”と検出されると駆動モータ
(22)は上記歯車列(23)を矢印(H)方向にバックラ
ッシ相当分だけ回転駆動されて歯車列にバックラッシを
生じさせ、給紙補助ローラ(8)はブラケット(17)を
介してこのバックラッシ相当分だけ動けるようになる。
Next, when the detector (16) detects that the document (1) is "absent", the drive motor (22) is moved in the direction of the arrow (H) by an amount corresponding to the backlash provided in the gear train (23). It is driven to rotate. This causes backlash, that is, play in the gear train (23). Then, when the rotating shaft (4) is rotated by the amount corresponding to the backlash through the bracket (17), the leaf spring (19) and the pressing piece (20) by the force (F) generated by the coil spring (21), the paper feed assist is provided. The roller (8) returns to its original position. In this way, if the gear train (23) is provided with the backlash corresponding to the above-mentioned interval in accordance with the interval provided between the document table (2) and the paper feed auxiliary roller (8), the detector (16)
When the document (1) is detected as "absent" by the drive motor (22), the drive motor (22) is driven to rotate the gear train (23) in the direction of the arrow (H) by an amount corresponding to the backlash, causing backlash in the gear train, and feeding The paper auxiliary roller (8) can move by the amount corresponding to this backlash through the bracket (17).

そして、コイルバネ(21)の力(F)によってブラケ
ット(17)がバックラッシ相当分だけ回転され、原稿台
(2)と給紙補助ローラ(8)との間に原稿を挿入する
に十分な間隔が生じる。
Then, the bracket (17) is rotated by the amount corresponding to the backlash by the force (F) of the coil spring (21), and a sufficient space is provided between the document table (2) and the paper feed auxiliary roller (8) for inserting the document. Occurs.

〔発明の効果〕〔The invention's effect〕

以上のように、この発明によれば、駆動モータの正転
時には原稿が正常に給紙され、駆動モータの逆転時には
原稿台と給紙補助ローラ間に間隔を確保でき、薄くてこ
しの弱い原稿であっても給紙不良なく確実に給紙でき
る。
As described above, according to the present invention, a document is normally fed when the drive motor rotates in the normal direction, and a space can be secured between the document table and the feeding assist roller when the drive motor rotates in the reverse direction, so that the document is thin and weak. Even if it is, the paper can be reliably fed without a paper feeding failure.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの発明の一実施例による自動給紙装置を示す
側面図、第2図は従来の自動給紙装置を示す側面図であ
る。 図において(2)は原稿台、(3)は給紙ローラ、
(4)は回転軸、(8)は給紙補助ローラ、(18)は駆
動ローラ、(19)は板バネ、(20)は押圧片、(21)は
コイルバネ、(22)は駆動モータ、(22)は歯車列であ
る。 なお、図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a side view showing an automatic paper feeder according to an embodiment of the present invention, and FIG. 2 is a side view showing a conventional automatic paper feeder. In the figure, (2) is a document table, (3) is a paper feed roller,
(4) is a rotary shaft, (8) is a paper feed auxiliary roller, (18) is a drive roller, (19) is a leaf spring, (20) is a pressing piece, (21) is a coil spring, (22) is a drive motor, (22) is a gear train. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】給紙方向に回転駆動される給紙ローラと、
この給紙ローラのローラ面に接触可能に押圧配設された
分離片とを有し、原稿台上に積載された複数枚の原稿を
上記分離片の上部より一枚づつ分離して給紙する自動給
紙装置において、 上記給紙ローラの上流側に配置されていて、上記給紙ロ
ーラからの駆動力によって上記給紙方向に回動される給
紙補助ローラと、上記給紙ローラを駆動するための駆動
モータと、上記給紙ローラ及び上記給紙補助ローラが回
転自在に支承されたブラケットと、このブラケットに固
定され、上記給紙ローラの回転軸に接触する押圧片と、
上記給紙ローラと上記駆動モータとの間に設けられ、上
記駆動モータの回転力を上記給紙ローラに伝達する歯車
列とを具備し、上記駆動モータの正転時に上記押圧片を
介して上記給紙補助ローラを上記原稿に押圧するととも
に、上記駆動モータの逆転時に上記歯車列のバックラッ
シ相当分だけ上記押圧片を介して上記給紙補助ローラを
上記原稿から離隔する方向に復帰させるようにしたこと
を特徴とする自動給紙装置。
1. A paper feed roller which is rotationally driven in a paper feed direction,
A plurality of originals stacked on the original table are separated one by one from the upper part of the separating piece and are fed. In an automatic sheet feeding device, the sheet feeding auxiliary roller which is arranged on the upstream side of the sheet feeding roller and is rotated in the sheet feeding direction by the driving force from the sheet feeding roller is driven. A drive motor, a bracket on which the paper feed roller and the paper feed auxiliary roller are rotatably supported, and a pressing piece fixed to the bracket and in contact with the rotation shaft of the paper feed roller,
A gear train that is provided between the paper feed roller and the drive motor and transmits the rotational force of the drive motor to the paper feed roller; The paper feed auxiliary roller is pressed against the original document, and when the drive motor is rotated in the reverse direction, the paper feed auxiliary roller is returned in a direction separated from the original document by the pressing piece corresponding to the backlash of the gear train. An automatic paper feeder characterized in that
JP62231535A 1987-09-16 1987-09-16 Automatic paper feeder Expired - Fee Related JP2555630B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62231535A JP2555630B2 (en) 1987-09-16 1987-09-16 Automatic paper feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62231535A JP2555630B2 (en) 1987-09-16 1987-09-16 Automatic paper feeder

Publications (2)

Publication Number Publication Date
JPS6472872A JPS6472872A (en) 1989-03-17
JP2555630B2 true JP2555630B2 (en) 1996-11-20

Family

ID=16925015

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62231535A Expired - Fee Related JP2555630B2 (en) 1987-09-16 1987-09-16 Automatic paper feeder

Country Status (1)

Country Link
JP (1) JP2555630B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7370857B2 (en) 2003-05-02 2008-05-13 Seiko Epson Corporation Paper feeding apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60161844A (en) * 1984-02-03 1985-08-23 Riso Kagaku Corp Paper feeder

Also Published As

Publication number Publication date
JPS6472872A (en) 1989-03-17

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