JPH05116771A - Sheet feeding device - Google Patents

Sheet feeding device

Info

Publication number
JPH05116771A
JPH05116771A JP27926991A JP27926991A JPH05116771A JP H05116771 A JPH05116771 A JP H05116771A JP 27926991 A JP27926991 A JP 27926991A JP 27926991 A JP27926991 A JP 27926991A JP H05116771 A JPH05116771 A JP H05116771A
Authority
JP
Japan
Prior art keywords
paper
sheet
paper table
main body
sheet feeding
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
Application number
JP27926991A
Other languages
Japanese (ja)
Other versions
JP2675936B2 (en
Inventor
Tsutomu Fujiwara
勉 藤原
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.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric Co Ltd
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 Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP3279269A priority Critical patent/JP2675936B2/en
Publication of JPH05116771A publication Critical patent/JPH05116771A/en
Application granted granted Critical
Publication of JP2675936B2 publication Critical patent/JP2675936B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To provide a sheet feeding device which reliably feeds sheet-form paper pieces one by one to the sheet feed port of an image recording device without being influenced by the thickness of a paper sheet. CONSTITUTION:A paper table on which sheet-form paper P are placed is divided into front and rear paper tables 2A and 2B. The rear end part of the front paper table 2A is vertically rotatably arranged and the front end part of the rear paper table 2B is vertically rotatably provided. An eccentric cam 10A to change the rear paper table 2B from a parallel state to an inclined state based on the front paper table 2A is mounted on the upper surface part of a body.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、印字装置やレーザプリ
ンタなどの画像記録装置にシート状用紙を供給するため
の給紙装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for feeding sheet-like paper to an image recording device such as a printing device or a laser printer.

【0002】[0002]

【従来の技術】従来、この種の給紙装置は、画像記録装
置の給紙口に装着される本体と、この本体の上面部に上
下方向に回動自在に設けられたペーパーテーブルと、こ
のペーパーテーブル上に積載された複数枚のシート状用
紙をバネ力により給紙ローラに押し当てるバネ部材と、
上記本体の上面部に設けられた左右一対の用紙分離部材
とを有し、給紙ローラの摩擦力と用紙分離部材の用紙分
離力とによりシート状用紙を画像記録装置の給紙口へ1
枚ずつ供給するように構成されている。
2. Description of the Related Art Conventionally, a sheet feeding apparatus of this type has a main body mounted in a sheet feeding port of an image recording apparatus, a paper table rotatably provided in an upper and lower direction on an upper surface of the main body, and a paper table. A spring member that presses a plurality of sheet-shaped sheets stacked on the paper table against the sheet feeding roller by a spring force,
It has a pair of left and right sheet separating members provided on the upper surface of the main body, and the sheet-like sheet is fed to the sheet feeding port of the image recording apparatus by the frictional force of the sheet feeding roller and the sheet separating force of the sheet separating member.
It is configured to supply one by one.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の給紙装置では、用紙分離部材の爪部をシート
状用紙の前側コーナ部に係合させ、シート状用紙のコシ
を利用して給紙ローラに接するシート状用紙を他のシー
ト状用紙から分離させる方式を採用しているため、紙厚
が薄い用紙(連量で55〜70kg重)の場合には問題
ないが、紙厚が厚い用紙(連量で80kg重前後)の場
合には給紙ローラの摩擦力よりも用紙のコシのほうが強
くなり、スキュー等が発生するという問題があった。な
お、スキュー等の送り不良を防止するためには給紙ロー
ラに対するシート状用紙の接触圧つまりバネ部材のバネ
力を強くすれば良いが、バネ部材のバネ力を強くする
と、紙厚の薄い用紙を使用した場合に多重送りが発生す
るという問題があった。
However, in such a conventional sheet feeding device, the claw portion of the sheet separating member is engaged with the front corner portion of the sheet-like sheet and the sheet-like sheet is fed by utilizing the stiffness of the sheet-like sheet. Since the method of separating the sheet-shaped paper that contacts the paper roller from other sheet-shaped paper is adopted, there is no problem in the case of thin paper (continuous weight of 55 to 70 kg), but thick paper In the case of paper (a continuous weight of about 80 kg), the stiffness of the paper becomes stronger than the frictional force of the paper feed roller, and there is a problem that skew or the like occurs. In order to prevent feeding defects such as skew, it is sufficient to increase the contact pressure of the sheet-shaped paper with respect to the paper feed roller, that is, the spring force of the spring member. However, there is a problem that multi-feed occurs when is used.

【0004】本発明は上記のような問題点に鑑みてなさ
れたもので、その目的は紙厚に左右されることなくシー
ト状用紙を画像記録装置の給紙口へ1枚ずつ確実に供給
することのできる給紙装置を提供しようとするものであ
る。
The present invention has been made in view of the above problems, and its purpose is to reliably feed sheet-like sheets one by one to a sheet feed port of an image recording apparatus without being influenced by the sheet thickness. The present invention is intended to provide a paper feeding device that can do this.

【0005】[0005]

【課題を解決するための手段】上記課題を解決するため
に本発明は、画像記録装置の給紙口に装着される本体
と、この本体の上面部に上下方向に回動自在に設けられ
たペーパーテーブルと、このペーパーテーブル上に積載
された複数枚のシート状用紙を付勢力により給紙ローラ
に押し当てる付勢部材と、前記本体の上面部に設けられ
前記シート状用紙の前側コーナ部に係合する爪部を有す
る左右一対の用紙分離部材とを有する給紙装置におい
て、前記ペーパーテーブルを前側ペーパーテーブルと後
側ペーパーテーブルとに分割し、前記前側ペーパーテー
ブルの後端部を上下方向に回動自在に設けると共に前記
後側ペーパーテーブルの前端部を上下方向に回動自在に
設け、かつ前記本体の上面部に前記後側ペーパーテーブ
ルを前記前側ペーパーテーブルに対して平行な状態から
傾斜した状態に変化させる手段を設けたものである。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is provided with a main body mounted on a paper feed port of an image recording apparatus, and an upper surface of the main body so as to be vertically rotatable. A paper table, an urging member that presses a plurality of sheet-shaped sheets stacked on the paper table against a sheet feeding roller by an urging force, and a front corner portion of the sheet-shaped sheet provided on the upper surface of the main body. In a sheet feeding device having a pair of left and right sheet separating members having engaging claw portions, the paper table is divided into a front paper table and a rear paper table, and a rear end portion of the front paper table is vertically moved. The front end of the rear paper table is rotatably provided, and the front end of the rear paper table is vertically rotatable, and the rear paper table is provided on the upper surface of the main body. It is provided with a means for changing the state of being inclined from the parallel to the Buru.

【0006】[0006]

【作用】上記の構成によると、後側ペーパーテーブルを
前側ペーパーテーブルに対して平行な状態から傾斜した
状態に変化させると、給紙ローラに対するシート状用紙
の接触圧が強まり、逆に後側ペーパーテーブルを前側ペ
ーパーテーブルに対して平行な状態に戻すと、給紙ロー
ラに対するシート状用紙の接触圧が弱まる。したがっ
て、給紙ローラに対するシート状用紙の接触圧を紙厚に
応じて切り替えることができ、これにより紙厚に左右さ
れることなくシート状用紙を画像記録装置の給紙口へ1
枚ずつ確実に供給することができる。
According to the above construction, when the rear paper table is changed from the state parallel to the front paper table to the state inclined, the contact pressure of the sheet-shaped paper against the paper feed roller is increased, and conversely, the rear paper table is reversed. When the table is returned to be parallel to the front paper table, the contact pressure of the sheet of paper with respect to the paper feed roller is weakened. Therefore, the contact pressure of the sheet-shaped paper with respect to the paper feed roller can be switched according to the paper thickness, so that the sheet-shaped paper can be fed to the paper feed port of the image recording apparatus without being influenced by the paper thickness.
It is possible to supply each piece reliably.

【0007】[0007]

【実施例】以下、本発明の一実施例を図1〜図4を参照
して説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

【0008】図1は本発明の一実施例に係る給紙装置の
正面図で、図2はその平面図である。また、図3は図2
におけるA−A線の矢視断面図であり、この給紙装置の
本体1には、前側ペーパーテーブル2Aと後側ペーパー
テーブル2Bが本体1の上面部を覆うように設けられて
いる。これらのペーペーテーブル2A,2Bは例えば金
属製の板状材で形成されており、軸3を中心として上下
方向に回動自在となっている。この軸3は前側ペーパー
テーブル2Aの後端部と後側ペーパーテーブル2Bの前
端部を回動自在に支持するものであり、両端部を本体1
の左右側壁部に支持されている。
FIG. 1 is a front view of a sheet feeding device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. In addition, FIG.
2 is a cross-sectional view taken along the line AA in FIG. 1. A front side paper table 2A and a rear side paper table 2B are provided in the main body 1 of the sheet feeding device so as to cover an upper surface portion of the main body 1. These paper tables 2A and 2B are made of, for example, a metal plate-like material, and are rotatable around a shaft 3 in the vertical direction. The shaft 3 rotatably supports the rear end of the front paper table 2A and the front end of the rear paper table 2B.
Is supported on the left and right side walls of the.

【0009】また、本体1の上面部にはコイル状のバネ
部材4a,4bが設けられている。これらのバネ部材4
a,4bは、前側ペーパーテーブル2A及び後側ペーパ
ーテーブル2B上に積載された複数枚のシート状用紙P
を給紙ローラ5a,5bに押し当てるためのものであ
り、給紙ローラ5a,5bの真下に配置されている。
Coil-shaped spring members 4a and 4b are provided on the upper surface of the main body 1. These spring members 4
a and 4b are a plurality of sheet-like sheets P stacked on the front paper table 2A and the rear paper table 2B.
Is to be pressed against the paper feed rollers 5a and 5b, and is arranged directly below the paper feed rollers 5a and 5b.

【0010】なお、給紙ローラ5a,5bは駆動軸6を
介して本体1の左右側壁部に回転自在に支持されてお
り、駆動軸6の一端には、画像記録装置側の駆動ギヤ
(図示せず)と係合する従動ギヤ7が設けられている。
The paper feed rollers 5a and 5b are rotatably supported on the left and right side wall portions of the main body 1 via a drive shaft 6, and one end of the drive shaft 6 has a drive gear on the image recording apparatus side (see FIG. A driven gear 7 that engages with (not shown) is provided.

【0011】また、本体1の上面部には用紙分離部材8
a,8bが設けられている。これらの用紙分離部材8
a,8bは、給紙ローラ5a,5bによりシート状用紙
Pを画像記録装置の給紙口へ供給する際に給紙ローラ5
a,5bと接するシート状用紙Pを他のシート状用紙P
と分離させるためのものであり、シート状用紙Pの前側
コーナ部に係合する爪部9を備えている。
A sheet separating member 8 is provided on the upper surface of the main body 1.
a and 8b are provided. These paper separating members 8
a and 8b are the paper feed rollers 5a and 5b when the sheet-shaped paper P is supplied to the paper feed port of the image recording apparatus by the paper feed rollers 5a and 5b.
a sheet of paper P that contacts a and 5b is replaced with another sheet of paper P
And a claw portion 9 for engaging with the front side corner portion of the sheet-like paper P.

【0012】また、本体1の上面部には偏心カム10
a,10bが後側ペーパーテーブル2Bの下面側に配置
されている。これらの偏心カム10a,10bは、後側
ペーパーテーブル2Bを前側ペーパーテーブル2Aに対
して平行な状態から下向きに傾斜した状態に変化させる
ためのものであり、カム軸11に支持されている。この
カム軸11は本体1の左右側壁部に回転自在に支持され
ており、カム軸11の一端には操作レバー12が設けら
れている。
An eccentric cam 10 is provided on the upper surface of the main body 1.
a and 10b are arranged on the lower surface side of the rear paper table 2B. The eccentric cams 10a and 10b are for changing the rear side paper table 2B from a state parallel to the front side paper table 2A to a state inclined downward, and are supported by the cam shaft 11. The cam shaft 11 is rotatably supported on the left and right side walls of the main body 1, and an operation lever 12 is provided at one end of the cam shaft 11.

【0013】上記のように構成される給紙装置では、操
作レバー12を操作して偏心カム10a,10bを約1
/2回転させ、図4に示すように後側ペーパーテーブル
2Bを前側ペーパーテーブル2Aに対して平行な状態か
ら下向き傾斜した状態に変化させると、前側ペーパーテ
ーブル2A及び後側ペーパーテーブル2B上に積載され
たシート状用紙Pが弓形となり、用紙のコシによってシ
ート状用紙Pに給紙ローラ5a,5bを押し上げる力が
生じる。これにより給紙ローラ5a,5bに対するシー
ト状用紙Pの接触圧が増大するので、スキュー等を発生
させることなく紙厚の厚いシート状用紙を画像記録装置
の給紙口に供給することができる。
In the sheet feeding device constructed as described above, the operation lever 12 is operated to move the eccentric cams 10a and 10b to about 1 mm.
/ 2 rotation, as shown in FIG. 4, when the rear paper table 2B is changed from the state parallel to the front paper table 2A to the state inclined downward, the paper is loaded on the front paper table 2A and the rear paper table 2B. The sheet-shaped sheet P thus formed has an arched shape, and a force of pushing up the sheet feeding rollers 5a and 5b is generated on the sheet-shaped sheet P due to the stiffness of the sheet. As a result, the contact pressure of the sheet-shaped paper P with respect to the paper feed rollers 5a and 5b increases, so that a sheet-shaped paper having a large paper thickness can be supplied to the paper feed port of the image recording apparatus without causing skew or the like.

【0014】また、紙厚の薄い用紙を使用する場合に
は、後側ペーパーテーブル2Bを前側ペーパーテーブル
2Aに対して平行な状態に戻すと、給紙ローラ5a,5
bに対するシート状用紙Pの接触圧が弱まるので、多重
送りを発生させることなく紙厚の薄いシート状用紙を画
像記録装置の給紙口に供給することができる。
Further, when a thin paper is used, when the rear paper table 2B is returned to a state parallel to the front paper table 2A, the paper feed rollers 5a, 5
Since the contact pressure of the sheet-shaped paper P with respect to b is weakened, the thin sheet-shaped paper can be supplied to the paper feed port of the image recording apparatus without causing multi-feeding.

【0015】このように本実施例では、シート状用紙P
が積載されるペーパーテーブルを前側ペーパーテーブル
2Aと後側ペーパーテーブル2Bとに分割し、前側ペー
パーテーブル2Aの後端部を軸3を中心として上下方向
に回動自在に設けると共に後側ペーパーテーブル2Bの
前端部を軸3を中心として上下方向に回動自在に設け、
かつ本体1の上面部に後側ペーパーテーブル2Bを前側
ペーパーテーブル2Aに対して平行な状態から下向きに
傾斜した状態に変化させる偏心カム10a,10bを設
けたので、後側ペーパーテーブル2Bを前側ペーパーテ
ーブル2Aに対して平行な状態から下向きに傾斜した状
態に変化させることにより、給紙ローラ5a,5bに対
するシート状用紙Pの接触圧を増大させることができ
る。したがって、給紙ローラ5a,5bに対するシート
状用紙Pの接触圧を紙厚に応じて切り替えることができ
るので、紙厚に左右されることなくシート状用紙Pを画
像記録装置の給紙口へ1枚ずつ確実に供給することがで
きる。
As described above, in this embodiment, the sheet-like paper P
Is divided into a front paper table 2A and a rear paper table 2B, and a rear end portion of the front paper table 2A is provided so as to be vertically rotatable about an axis 3 and a rear paper table 2B. The front end of the is provided so as to be vertically rotatable about the shaft 3,
Moreover, since the eccentric cams 10a and 10b for changing the rear paper table 2B from the parallel state to the front paper table 2A to the downward inclined state are provided on the upper surface of the main body 1, the rear paper table 2B is moved to the front paper. By changing from the state parallel to the table 2A to the state inclined downward, it is possible to increase the contact pressure of the sheet-shaped paper P with respect to the paper feed rollers 5a and 5b. Therefore, the contact pressure of the sheet-shaped paper P to the paper feed rollers 5a and 5b can be switched according to the paper thickness, so that the sheet-shaped paper P can be fed to the paper feed port of the image recording apparatus without being influenced by the paper thickness. It is possible to supply each piece reliably.

【0016】なお、上記実施例では給紙ローラ5a,5
bを給紙装置側に設けたが、画像記録装置側に設けても
同様の効果を得ることができる。また、上記実施例では
前側ペーパーテーブル2Aと後側ペーパーテーブル2B
を共通の軸3で支持したが、それぞれ別々の軸で支持す
るようにしてもよい。
In the above embodiment, the sheet feeding rollers 5a, 5
Although b is provided on the sheet feeding device side, the same effect can be obtained by providing it on the image recording device side. Further, in the above embodiment, the front paper table 2A and the rear paper table 2B are used.
Although they are supported by the common shaft 3, they may be supported by different shafts.

【0017】また、上記実施例では後側ペーパーテーブ
ル2Bを前側ペーパーテーブル2Aに対して平行な状態
から下向きに傾斜した状態に変化させる手段として偏心
カム10a,10bを用いたが、偏心カムの代わりにリ
ンク機構等を用いてもよい。
In the above embodiment, the eccentric cams 10a and 10b are used as means for changing the rear side paper table 2B from the state parallel to the front side paper table 2A to the state inclined downward, but instead of the eccentric cams. Alternatively, a link mechanism or the like may be used.

【0018】[0018]

【発明の効果】以上説明したように本発明は、シート状
用紙が積載されるペーパーテーブルを前側ペーパーテー
ブルと後側ペーパーテーブルとに分割し、前側ペーパー
テーブルの後端部を上下方向に回動自在に設けると共に
後側ペーパーテーブルの前端部を上下方向に回動自在に
設け、かつ本体の上面部に後側ペーパーテーブルを前側
ペーパーテーブルに対して平行な状態から傾斜した状態
に変化させる手段を設けたので、給紙ローラに対するシ
ート状用紙の接触圧を紙厚に応じて切り替えることがで
きる。したがって、紙厚に左右されることなくシート状
用紙を画像記録装置の給紙口へ1枚ずつ確実に供給する
ことのできる給紙装置を提供できる。
As described above, according to the present invention, the paper table on which the sheet-like sheets are stacked is divided into the front paper table and the rear paper table, and the rear end of the front paper table is vertically rotated. The front end of the rear paper table is freely rotatable, and the front end of the rear paper table is rotatable in the vertical direction. Since it is provided, the contact pressure of the sheet-shaped paper with respect to the paper feed roller can be switched according to the paper thickness. Therefore, it is possible to provide a sheet feeding device capable of reliably feeding the sheet-shaped sheets one by one to the sheet feeding port of the image recording apparatus without being influenced by the sheet thickness.

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

【図1】本発明の一実施例に係る給紙装置の正面図。FIG. 1 is a front view of a paper feeding device according to an embodiment of the present invention.

【図2】同じく給紙装置の平面図。FIG. 2 is a plan view of the sheet feeding device.

【図3】図2におけるA−A線の矢視断面図。3 is a sectional view taken along the line AA in FIG.

【図4】同実施例の作用説明図。FIG. 4 is an operation explanatory view of the same embodiment.

【符号の説明】[Explanation of symbols]

1…本体、2A…前側ペーパーテーブル、2B…後側ペ
ーパーテーブル、4a,4b…バネ部材、5a,5b…
給紙ローラ、8a,8b…用紙分離部材、10a,10
b…偏心カム、11…カム軸、12…操作レバー。
1 ... Main body, 2A ... Front side paper table, 2B ... Rear side paper table, 4a, 4b ... Spring member, 5a, 5b ...
Paper feed rollers, 8a, 8b ... Paper separating members, 10a, 10
b ... eccentric cam, 11 ... cam shaft, 12 ... operating lever.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 画像記録装置の給紙口に装着される本体
と、この本体の上面部に上下方向に回動自在に設けられ
たペーパーテーブルと、このペーパーテーブル上に積載
された複数枚のシート状用紙を付勢力により給紙ローラ
に押し当てる付勢部材と、前記本体の上面部に設けられ
前記シート状用紙の前側コーナ部に係合する爪部を有す
る左右一対の用紙分離部材とを有する給紙装置におい
て、前記ペーパーテーブルを前側ペーパーテーブルと後
側ペーパーテーブルとに分割し、前記前側ペーパーテー
ブルの後端部を上下方向に回動自在に設けると共に前記
後側ペーパーテーブルの前端部を上下方向に回動自在に
設け、かつ前記本体の上面部に前記後側ペーパーテーブ
ルを前記前側ペーパーテーブルに対して平行な状態から
傾斜した状態に変化させる手段を設けたことを特徴とす
る給紙装置。
1. A main body attached to a paper feed port of an image recording apparatus, a paper table rotatably provided on an upper surface of the main body in a vertical direction, and a plurality of sheets stacked on the paper table. An urging member that presses the sheet-shaped sheet against the sheet feeding roller by an urging force, and a pair of left and right sheet separating members that are provided on the upper surface of the main body and that have a claw portion that engages with the front corner of the sheet-shaped sheet. In the sheet feeding device having the paper table, the paper table is divided into a front paper table and a rear paper table, a rear end of the front paper table is rotatably provided in the vertical direction, and a front end of the rear paper table is provided. It is rotatably provided in the vertical direction, and the rear side paper table is changed from a state parallel to the front side paper table to an inclined state on the upper surface of the main body. A sheet feeding device, characterized in that it is provided with a means for causing it.
JP3279269A 1991-10-25 1991-10-25 Paper feeder Expired - Fee Related JP2675936B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3279269A JP2675936B2 (en) 1991-10-25 1991-10-25 Paper feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3279269A JP2675936B2 (en) 1991-10-25 1991-10-25 Paper feeder

Publications (2)

Publication Number Publication Date
JPH05116771A true JPH05116771A (en) 1993-05-14
JP2675936B2 JP2675936B2 (en) 1997-11-12

Family

ID=17608816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3279269A Expired - Fee Related JP2675936B2 (en) 1991-10-25 1991-10-25 Paper feeder

Country Status (1)

Country Link
JP (1) JP2675936B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020203771A (en) * 2019-06-18 2020-12-24 株式会社リコー Sheet feeding device, automatic document conveying device and image forming device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3059933U (en) * 1998-12-16 1999-07-13 株式会社ユタカメイク Paving material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100151A (en) * 1982-11-30 1984-06-09 Idemitsu Petrochem Co Ltd Polyethylene resin composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3059933U (en) * 1998-12-16 1999-07-13 株式会社ユタカメイク Paving material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020203771A (en) * 2019-06-18 2020-12-24 株式会社リコー Sheet feeding device, automatic document conveying device and image forming device

Also Published As

Publication number Publication date
JP2675936B2 (en) 1997-11-12

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