JPH0657572B2 - Sheet feeding device - Google Patents
Sheet feeding deviceInfo
- Publication number
- JPH0657572B2 JPH0657572B2 JP61180867A JP18086786A JPH0657572B2 JP H0657572 B2 JPH0657572 B2 JP H0657572B2 JP 61180867 A JP61180867 A JP 61180867A JP 18086786 A JP18086786 A JP 18086786A JP H0657572 B2 JPH0657572 B2 JP H0657572B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- feeding
- cassette
- rotating body
- lift member
- 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 - Lifetime
Links
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【発明の詳細な説明】 (イ) 産業上の利用分野 本発明は、複写機、レーザービームプリンタ等の画像形
成装置（以下複写機という）のシート給送装置に係り、
詳しくは、多数のシートを収納した箱型のシート収納装
置（以下カセットという）を複写機本体に装着し、該カ
セットに収納したシートを給送する方式（カセット方
式）のシート給送装置に関する。The present invention relates to a sheet feeding device of an image forming apparatus (hereinafter referred to as a copying machine) such as a copying machine and a laser beam printer,
More specifically, the present invention relates to a sheet feeding device of a system (cassette system) in which a box-shaped sheet storage device (hereinafter referred to as a cassette) storing a large number of sheets is attached to a copying machine main body and the sheets stored in the cassette are fed.
(ロ) 従来の技術 従来より、複写機におけるカセット方式のシート給送装
置は種々提案されている。(B) Conventional Technology Conventionally, various cassette-type sheet feeding devices for copying machines have been proposed.
第５図は、本出願人が先に出願したシート給送装置Ｍ′
の主要部構造を示すものであり（特願昭６１−６５０５
３号）、カセット装着部（図示せず）に多数のシートＳ
を収納する着脱自在なカセット１０を挿入すると、軸１
５に固定されているレバー１６の端部１６ａがカセット
１０の両サイドにあるカム面１０ａに沿って回転すると
共に、バネ１７により加圧されている加圧板１９とリフ
ト部材２０′が回転して中板９を押し上げる。そして、
該中板９に積載されているシートＳは給送ローラ１と接
触し、これにより加圧板１９は停止するが、レバー１６
の端部１６ａはカセット両サイドのカム面１０ａに沿っ
て回転する。また、該カセット１０が図示しないカセッ
トストッパーに当接すると、該端部１６ａはカセット１
０の上端まで上昇してカセット１０の先端のくぼみ１０
ｂに落ち込みカセット１０を固定し、該レバー１６とく
ぼみ１０ｂはカセット１０のロック手段を構成してい
る。更に、加圧板１９は、加圧バネ１７により旋回力が
作用し、シートＳを給送ローラ１へ圧接する。FIG. 5 shows a sheet feeding device M ′ previously filed by the applicant.
This shows the structure of the main part of Japanese Patent Application No. 61-6505.
3), a large number of sheets S in the cassette mounting portion (not shown)
When you insert the removable cassette 10 that stores the
The end portion 16a of the lever 16 fixed to 5 rotates along the cam surfaces 10a on both sides of the cassette 10, and the pressure plate 19 and the lift member 20 'pressed by the spring 17 rotate. Push up the middle plate 9. And
The sheets S stacked on the intermediate plate 9 come into contact with the feeding roller 1 and the pressing plate 19 is stopped by this, but the lever 16
End portions 16a rotate along the cam surfaces 10a on both sides of the cassette. Further, when the cassette 10 comes into contact with a cassette stopper (not shown), the end portion 16a is moved to the cassette 1
0 up to the upper end of the cassette 10
The cassette 10 is fixed to the tray 10b, and the lever 16 and the recess 10b constitute a locking means of the cassette 10. Further, the pressing plate 19 is rotated by the pressing spring 17, and presses the sheet S against the feeding roller 1.
(ハ) 発明が解決しようとする問題点 ところで、上述シート給送装置Ｍ′は、組立精度上、給
送ローラ１と加圧板１９の軸１５とを平行に組立てるこ
とは実際には困難であるので、給送ローラ１とシートＳ
は、第６図に示すように、片当りすることが多く、この
状態のままでシートＳが給送されると斜行を起こしてし
まっていた。(C) Problems to be Solved by the Invention In the sheet feeding apparatus M ′, it is actually difficult to assemble the feeding roller 1 and the shaft 15 of the pressure plate 19 in parallel in terms of assembly accuracy. Therefore, the feeding roller 1 and the sheet S
As shown in FIG. 6, there is often one-sided contact, and when the sheet S is fed in this state, skewing occurs.
(ニ) 問題を解決するための手段 本発明は、多数のシートを載置すると共に移動自在に支
持された中板を有し、装置本体に対して着脱自在に支持
されたシート収納装置と、該中板に当接し得るように回
動自在に支持されたリフト部材を有するリフタ装置と、
該リフト部材に弾性部材を介して連結されると共に前記
シート収納装置の装着動作に応じて回動する回動部材
と、前記シート収納装置に収納されたシートを給送する
給送回転体と、を備え、かつ、前記回動部材の回動に応
じて前記リフト部材が前記中板を移動してシートを前記
給送回転体に圧接するシート給送装置において、前記リ
フト部材の前記中板に当接する部分を、前記給送回転体
に比して幅狭に構成すると共に、該給送回転体の略々中
央に配置し、前記回動部材に、前記弾性部材の反力によ
り前記シート収納装置に係合して該収納装置の装着位置
を規制するロック部を形成した、ことを特徴とする。(D) Means for solving the problem The present invention has a sheet storage device having a middle plate on which a large number of sheets are placed and which is movably supported, and which is detachably supported on the device main body. A lifter device having a lift member rotatably supported so as to come into contact with the intermediate plate;
A rotating member that is connected to the lift member via an elastic member and that rotates according to a mounting operation of the sheet storage device; and a feeding rotator that feeds the sheet stored in the sheet storage device. In the sheet feeding device, wherein the lift member moves the intermediate plate according to the rotation of the rotating member to press the sheet against the feeding rotating body, the intermediate plate of the lift member is provided. The abutting portion is configured to have a width narrower than that of the feeding rotating body, and is disposed substantially at the center of the feeding rotating body, and the rotating member has the sheet storage by the reaction force of the elastic member. It is characterized in that a lock portion which engages with the device and regulates the mounting position of the storage device is formed.
(ホ) 作用 上述構成に基づき、給送ローラの略々中央に配置された
リフト部材の当接部分が中板を押し上げて給送ローラに
シートを沿わせて圧接し、該給送ローラによりシートは
給送される。(E) Operation Based on the above-mentioned configuration, the contact portion of the lift member arranged substantially in the center of the feeding roller pushes up the intermediate plate and presses the sheet along the feeding roller, and the sheet is fed by the feeding roller. Will be delivered.
(ヘ) 実施例 以下、図面に沿って、本発明の実施例について説明す
る。(F) Example Hereinafter, an example of the present invention will be described with reference to the drawings.
シート給送装置Ｍは、第２図に示すように、給送ローラ
１及び分離パッド２を有しており、該ローラ１は機体本
体（図示せず）に軸支された軸３に固定されており、該
分離パッド２は、シート搬送路を形成する上、下ガイド
板５，６のうち下ガイド板６の前端に設けられている。
また該ローラ１の上流には、シートＳを収納するカセッ
ト１０が配設されており、該カセット１０は二重底を構
成している。更に、該シートＳは該カセット１０の二重
底を構成する中板９とリフタ装置１１とにより上方に付
勢されて給紙ローラ１へ当接するように構成されてい
る。As shown in FIG. 2, the sheet feeding device M has a feeding roller 1 and a separation pad 2, and the roller 1 is fixed to a shaft 3 pivotally supported by a machine body (not shown). The separation pad 2 is provided at the front end of the lower guide plate 6 among the lower guide plates 5 and 6 in addition to forming the sheet conveying path.
Further, a cassette 10 for accommodating the sheet S is arranged upstream of the roller 1, and the cassette 10 has a double bottom. Further, the sheet S is configured so as to be urged upward by the middle plate 9 and the lifter device 11 constituting the double bottom of the cassette 10 and contact the sheet feeding roller 1.
更に、該リフタ装置１１には、第１図に示すように、図
示しない複写機本体に固設された軸支板２１，２１に軸
１５が回動自在に架設されている。そして、該軸１５の
両端には夫々レバー（回動部材）１６，１６が固定され
ており、また、上記軸支板２１の１部が折り曲げられて
ストッパー２１ａが形成されていて、該レバー１６が所
定位置以下に下がらないようになっている。また、該軸
１５の略々中央にはバネ１７の一端１７ａが固定されて
おり、該軸１５には加圧板１９が回動自在に支持されて
いる。更に、該加圧板１９は、両端１９ａ，１９ｂが垂
直に折り曲げられかつ穴が穿設されており、該穴１２ａ
に該軸１５が嵌合されている。そして、該軸１５に一端
１７ａが固定されているバネ１７に近接してストッパー
２２が突設されており、該ストッパー２２は加圧板１９
と当接することにより加圧板１９が所定以上回転しない
ように構成されている。また、該加圧板１９の中央部に
はフック１９ｅが形成されており、該フック１９ｅにバ
ネ１７の一端１７ｂが係止されていて、加圧板１９が加
圧力を得るようになっている。また、該加圧板１９の先
端にはリフト部材２０が固定されており、該リフト部材
２０の略々中央は細い幅で膨出するように形成されてい
る。そして、前記カセット１０の底板１０ｃと前板１０
ｄとの加圧板１９が位置する部分１０ｅは開設されてお
り、また該カセット１０の側板１０ｆの前方はレバー１
６の先端部１６ａを該カセット１０の挿入により押し上
げるカム面１０ａを構成している。更に、該側板１０ｆ
の上部前方には窪み１０ｂが開設されており、該窪み１
０ｂと該レバー１６の先端部（ロック部）１６ａとが係
合することによりカセット１０のロック機構を構成す
る。Further, in the lifter device 11, as shown in FIG. 1, a shaft 15 is rotatably installed on shaft support plates 21 and 21 fixedly mounted on a copying machine main body (not shown). Lever (rotating members) 16 and 16 are fixed to both ends of the shaft 15, and a part of the shaft support plate 21 is bent to form a stopper 21a. Does not fall below a predetermined position. Further, one end 17a of a spring 17 is fixed to substantially the center of the shaft 15, and a pressure plate 19 is rotatably supported on the shaft 15. Further, both ends 19a and 19b of the pressure plate 19 are vertically bent and holes are formed, and the holes 12a are formed.
The shaft 15 is fitted in. A stopper 22 is provided so as to be proximate to the spring 17 whose one end 17a is fixed to the shaft 15, and the stopper 22 is provided with a pressing plate 19.
The pressure plate 19 is configured so as not to rotate more than a predetermined amount by contacting with. Further, a hook 19e is formed at the center of the pressure plate 19, and one end 17b of the spring 17 is locked to the hook 19e so that the pressure plate 19 obtains a pressing force. A lift member 20 is fixed to the tip of the pressing plate 19, and the lift member 20 is formed so as to bulge with a narrow width in the substantial center thereof. Then, the bottom plate 10c and the front plate 10 of the cassette 10 are
The part 10e of the cassette 10 where the pressure plate 19 is located is opened, and the side plate 10f of the cassette 10 is in front of the lever 1
A cam surface 10a that pushes up the front end portion 16a of the cassette 6 by inserting the cassette 10 is formed. Further, the side plate 10f
A recess 10b is formed in front of the upper part of the
0b and the tip portion (lock portion) 16a of the lever 16 engage with each other to form a lock mechanism of the cassette 10.
本実施例は、以上のような構成よりなるので、カセット
１０を図示しないカセットガイドに沿って挿入すると、
レバー１６の先端部１６ａがカセット１０の側板１０ｆ
の前方のカム面１０ａに沿って摺動してレバー１６は回
転（図示例では反時計回り）し、軸１５にその一端１７
ａが固定されている加圧バネ１７ａにより加圧されてい
る加圧板１９も回転する。そして、該カセット１０の中
板９は該加圧板１９の先端のリフト部材２０により押し
上げられ、該中板９に積載されているシートＳが給送ロ
ーラ１と接触する。これにより、該加圧板１９は停止す
るが、レバー１６はそのままカセット１０の両側板１０
ｆのカム面１０ａに沿って回転し、該カセット１０が図
示しないカセットストッパーに突きあたるとレバー１６
はカセット１０の上端まで持ち上がる。また、該レバー
１６の先端１６ａはカセット１０の側板１０ｆ先端の窪
み１０ｂに落ち込みカセット１０を固定する。更に、該
加圧板１９は加圧バネ１７を介して旋回力が作用してお
り、該加圧板１９の先端のリフト部材２０の中央部分が
中板９に当接して該中板９を押し上げ、給送ローラ１と
加圧板１９とが平行でない場合も、シートＳは給紙ロー
ラ１へ片当りせずに当接する（第３図参照）。そして、
図示しないスタートキーが押されると、該給送ローラ１
が回転を開始して最上位のシートＳを下流へ斜行せずに
給送する。この際、第２枚目以下のシートＳが最上位の
シートＳと重送された場合、第２枚目以下のシートＳは
分離パッド２に当接して停止し、分離パッド２より先に
は給送されない。また、該シートＳは、上・下ガイド板
５，６の間をレジストローラ対１３ヘ給送され、該レジ
ストローラ対１３により挾持されて下流へ搬送される。Since this embodiment has the above-mentioned configuration, when the cassette 10 is inserted along a cassette guide (not shown),
The tip portion 16a of the lever 16 is a side plate 10f of the cassette 10.
The lever 16 rotates (counterclockwise in the illustrated example) by sliding along the cam surface 10a in front of, and the shaft 15 has one end 17 thereof.
The pressure plate 19 pressed by the pressure spring 17a to which a is fixed also rotates. Then, the middle plate 9 of the cassette 10 is pushed up by the lift member 20 at the tip of the pressure plate 19, and the sheets S stacked on the middle plate 9 come into contact with the feeding roller 1. As a result, the pressure plate 19 is stopped, but the lever 16 remains as it is for the side plates 10 of the cassette 10.
When the cassette 10 rotates along the cam surface 10a of f and the cassette 10 strikes a cassette stopper (not shown), the lever 16
Is lifted to the upper end of the cassette 10. Further, the tip 16a of the lever 16 falls into the recess 10b at the tip of the side plate 10f of the cassette 10 to fix the cassette 10. Further, the pressure plate 19 is subjected to a turning force via the pressure spring 17, and the central portion of the lift member 20 at the tip of the pressure plate 19 contacts the middle plate 9 to push up the middle plate 9, Even when the feeding roller 1 and the pressure plate 19 are not parallel to each other, the sheet S abuts the sheet feeding roller 1 without one-sided contact (see FIG. 3). And
When a start key (not shown) is pressed, the feeding roller 1
Starts to rotate and feeds the uppermost sheet S downstream without skewing. At this time, when the second and subsequent sheets S are overlap-fed with the uppermost sheet S, the second and subsequent sheets S come into contact with the separation pad 2 and stop. Not delivered. Further, the sheet S is fed to the registration roller pair 13 between the upper and lower guide plates 5 and 6, held by the registration roller pair 13 and conveyed downstream.
なお、本実施例では、加圧板の先端部にリフト部材２０
を固定していたが、第４図(a)に示すように、加圧板１
９′の先端を半円筒状に形成してもよい。In this embodiment, the lift member 20 is attached to the tip of the pressure plate.
The pressure plate 1 was fixed as shown in Fig. 4 (a).
The tip of 9'may be formed in a semi-cylindrical shape.
更に、本実施例では、給送ローラ１は１個であったが、
該給送ローラ１が複数の場合、リフト部材２０は給送ロ
ーラの中央に合わせてその中心を合わせて配置すれば、
シートは複数のローラに沿って圧接される（第４図(b)
参照）。Further, in this embodiment, the number of the feeding roller 1 is one,
When the feeding rollers 1 are plural, if the lift member 20 is arranged so as to be aligned with the center of the feeding roller,
Sheets are pressed against each other along multiple rollers (Fig. 4 (b))
reference).
(ト) 発明の効果 以上説明したように、本発明によると、リフト部材の狭
い部分で積載台の中板を押上げるので、シート給送ロー
ラと加圧板が平行でなくてもシートをシート給送ローラ
へ沿わせて圧接することができる。(G) Effect of the Invention As described above, according to the present invention, since the middle plate of the loading platform is pushed up by the narrow portion of the lift member, even if the sheet feeding roller and the pressure plate are not parallel, the sheet is fed by It can be pressed along the feeding roller.
また、本発明によると、リフト部材を回動させるための
回動部材にロック部を一体的に形成したため、シート収
納装置の装着位置を規制する機構が簡単となる。すなわ
ち、シート収納装置の装着位置を規制する部材は、一般
的に、シート収納装置の装着に応じて変形又は移動する
等の複雑な機構を有することが必要であるが、前記回動
部材を利用することにより、その分部品点数が少なくな
り、装置自体のコストも安くなる。Further, according to the present invention, since the lock member is integrally formed with the rotating member for rotating the lift member, the mechanism for restricting the mounting position of the sheet storage device becomes simple. That is, the member that regulates the mounting position of the sheet storage device generally needs to have a complicated mechanism that deforms or moves according to the mounting of the sheet storage device. By doing so, the number of parts is reduced accordingly, and the cost of the apparatus itself is reduced.
第１図は本発明に係るリフタ装置を示す斜視図、第２図
は本発明に係るリフタ装置にシート収納装置を装着した
状態を示す側断面図、第３図は本発明の実施例を示す正
面図、第４図(a)は他の実施例を示す斜視図、第４図(b)
は他の実施例を示す背面図、第５図は従来例を示す側断
面図、第６図は従来例の作用を示す正面図である。 １……給送ローラ、９……中板、 １０……シート収納装置、１１……リフタ装置、 ２０……リフト部材、Ｓ……シート、 Ｍ……シート給送装置。FIG. 1 is a perspective view showing a lifter device according to the present invention, FIG. 2 is a side sectional view showing a state in which a sheet storage device is attached to the lifter device according to the present invention, and FIG. 3 shows an embodiment of the present invention. Front view, FIG. 4 (a) is a perspective view showing another embodiment, FIG. 4 (b)
Is a rear view showing another embodiment, FIG. 5 is a side sectional view showing a conventional example, and FIG. 6 is a front view showing the operation of the conventional example. 1 ... Feeding roller, 9 ... Middle plate, 10 ... Sheet storage device, 11 ... Lifter device, 20 ... Lift member, S ... Sheet, M ... Sheet feeding device.
Claims (3)
支持された中板を有し、装置本体に対して着脱自在に支
持されたシート収納装置と、該中板に当接し得るように
回動自在に支持されたリフト部材を有するリフタ装置
と、該リフト部材に弾性部材を介して連結されると共に
前記シート収納装置の装着動作に応じて回動する回動部
材と、前記シート収納装置に収納されたシートを給送す
る給送回転体と、を備え、かつ、前記回動部材の回動に
応じて前記リフト部材が前記中板を移動してシートを前
記給送回転体に圧接するシート給送装置において、 前記リフト部材の前記中板に当接する部分を、前記給送
回転体に比して幅狭に構成すると共に、該給送回転体の
略々中央に配置し、 前記回動部材に、前記弾性部材の反力により前記シート
収納装置に係合して該収納装置の装着位置を規制するロ
ック部を形成した、 ことを特徴とするシート給送装置。1. A sheet storage device having a middle plate on which a large number of sheets are placed and which is movably supported, and which is detachably supported with respect to the main body of the device, and is capable of abutting on the middle plate. A lifter device having a lift member that is rotatably supported, a rotary member that is connected to the lift member through an elastic member and that rotates according to a mounting operation of the sheet storage device, and the sheet storage device And a feeding rotating body that feeds the sheet stored in the sheet, and the lift member moves the intermediate plate according to the rotation of the rotating member to press the sheet against the feeding rotating body. In the sheet feeding apparatus, the portion of the lift member that comes into contact with the intermediate plate is configured to be narrower than the feeding rotating body, and is arranged substantially at the center of the feeding rotating body. The seat is stored in the rotating member by the reaction force of the elastic member. Engage the device to form a locking portion for regulating the mounting position of the housing unit, a sheet feeding apparatus, characterized in that.
回転体の半分以下である特許請求の範囲第１項記載のシ
ート給送装置。2. The sheet feeding device according to claim 1, wherein the width of the abutting portion of the lift member is less than half the width of the feeding rotating body.
ト幅方向略々中央に配置した特許請求の範囲第１項記載
のシート給送装置。3. The sheet feeding device according to claim 1, wherein the feeding rotating body and the lifter device are arranged substantially at the center in the sheet width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61180867A JPH0657572B2 (en) | 1986-07-31 | 1986-07-31 | Sheet feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61180867A JPH0657572B2 (en) | 1986-07-31 | 1986-07-31 | Sheet feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6337036A JPS6337036A (en) | 1988-02-17 |
| JPH0657572B2 true JPH0657572B2 (en) | 1994-08-03 |
Family
ID=16090737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61180867A Expired - Lifetime JPH0657572B2 (en) | 1986-07-31 | 1986-07-31 | Sheet feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0657572B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10139178A (en) * | 1996-11-06 | 1998-05-26 | Konica Corp | Paper feeding device and double-side image forming device |
| JP3321546B2 (en) * | 1997-04-17 | 2002-09-03 | シャープ株式会社 | Sheet material transport device |
| KR100775971B1 (en) * | 2001-10-27 | 2007-11-16 | 한국후지제록스 주식회사 | Automatic Up/Down Device of Bottom Plate for Paper Cassette |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59133541U (en) * | 1983-02-25 | 1984-09-06 | ミノルタ株式会社 | Paper cassette attachment/detachment device |
-
1986
- 1986-07-31 JP JP61180867A patent/JPH0657572B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6337036A (en) | 1988-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |