JPH03162333A - Sheet feed device - Google Patents
Sheet feed deviceInfo
- Publication number
- JPH03162333A JPH03162333A JP1304445A JP30444589A JPH03162333A JP H03162333 A JPH03162333 A JP H03162333A JP 1304445 A JP1304445 A JP 1304445A JP 30444589 A JP30444589 A JP 30444589A JP H03162333 A JPH03162333 A JP H03162333A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- paper feed
- feed roller
- cutout
- manual
- 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
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 101000849522 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 40S ribosomal protein S13 Proteins 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、円周の一部を切欠いたいわゆるＤ型給紙ロー
ラを用いて収納したシートを記録像形成部へ送り込むた
めのシート給送装置に圓し、特にこの種のＤ型給紙ロー
ラの切欠き部を利用して手差しシートの挿入をも可能と
なしたシート給送装置に閉する．
（従来技術）
複写機や記録装Ｍ等においては、所定サイズ｛こ裁断し
たシート以外に、特別のサイズのシートや厚手のシート
への？！写や記録書込みを必要とする場合があるため、
この種の装置には、給紙トレイや給紙カセットに収容し
た定サイズシ一トの搬送経路のほかに、手差しシートの
挿入経路を設Ｉナることが一般化されでいる．
この手差しシートの挿入経路は、操作上の面力＼ら定サ
イズシートの搬送経路上方に設けるの力《普通であるが
、定サイズシ一トの給送部１こ（よ袷送ローラが配設さ
れている関係上、手差しシートの挿入経路は必然的｛こ
給送ローラの上方に設けな１ｔればならず、このため、
特に小型のプリンタ１こおいては、薄型化を図る上で設
計上の困ｔｉをきたしたり、あるいは挿入経路に大きな
曲部を設けなければならなくなって手差し操作をすこぶ
る厄介なものにしてしまうといった問題を有していた．
一方、定サイズシ一トの給送手段として用いられている
Ｄ型給紙ローラ｛よ、非給紙時にシートとローラとを非
接触状態に保持しでおくことができる点で優れでいるが
、反面において、この種のローラはシート給送の初期に
おいて切欠き端縁によりシートを上方から押圧する作用
を伴うため、長期の使用によっては端締が摩耗したりあ
るいは送り出しが不正確になるといった不都合が生じ、
またこのような不都合を解消するために特公昭５９−４
２８６７号公報に開示ざれでいるような切欠き端部分に
小口ーラを配設したものでは、ローラをいたずらに複雑
化させでしまうといった問題が派生する．
（発明が解決しようとする課題）
本発明はこのような問題に鑑みでなされたもので、その
目的とするところは、Ｄ型給紙ローラを用いて手差しシ
ートの良好な挿入操作を可能とするとともに、装置の大
巾な薄型化をも可能とする新たなシート給送装置を提供
することにある。Detailed Description of the Invention (Industrial Field of Application) The present invention provides sheet feeding for feeding stored sheets to a recorded image forming section using a so-called D-shaped paper feeding roller having a part of its circumference cut out. In particular, it is a sheet feeding device that makes it possible to manually insert sheets by using the notch of this type of D-shaped paper feeding roller. (Prior art) In copying machines, recording devices, etc., in addition to sheets cut to a predetermined size, sheets of special sizes or thick sheets can be cut. ! Copying or recording may be required, so
It has become common for devices of this type to be provided with an insertion path for manually feeding sheets in addition to a transport path for fixed size sheets stored in a paper feed tray or a paper feed cassette. This insertion path for manual feed sheets is affected by the operational force ＼ and the force provided above the conveyance path for fixed size sheets. Because of this, the insertion path for the manual sheet must necessarily be provided above the feeding roller.
Particularly in the case of small-sized printers, there are problems in design when trying to make the product thinner, or a large curved part must be provided in the insertion path, making manual insertion extremely cumbersome. I had a problem.
On the other hand, the D-type paper feed roller, which is used as a feeding means for fixed-size sheets, is superior in that the sheet and roller can be kept in a non-contact state when paper is not being fed. On the other hand, this type of roller has the effect of pressing the sheet from above with the notched edge at the beginning of sheet feeding, so long-term use can cause problems such as wear of the end clamp or inaccurate feeding. occurs,
In addition, in order to eliminate such inconvenience, the special public
In the case where the edge roller is disposed at the notch end, as is not disclosed in Japanese Patent No. 2867, there arises a problem that the roller becomes unnecessarily complicated. (Problems to be Solved by the Invention) The present invention has been made in view of the above problems, and its purpose is to enable a good insertion operation of manually fed sheets using a D-type paper feed roller. Another object of the present invention is to provide a new sheet feeding device that allows the device to be made significantly thinner.
（課題を解決するための手段）
すなわち、本発明はかがる目的を達或するためのシート
給送装置としで、給紙ローラの周面一部に、収納された
シートと非接触関係を持たす平坦な切欠き面を形成して
、その切欠き面と両側縁部分を摩擦係数の小なる部材に
より被覆する一方、給紙ローラ駆動軸には、切欠き面が
手差しシートの挿入側に向けで上向き傾斜するような待
機姿勢を採らすべく給紙ローラを位置決めする係止部を
設けたものである．
（作用）
このように構成したことにより、手差しシートの挿入部
から挿入したシートを、給紙口〜ラに設けた摩擦係数の
小さな切欠き面に沿わせて収納シートと同じ給送経路に
導いて記録書込み部へと送り込むことができる．
（実施例）
そこで以下に図示した実施例について説明する．
第１図は本発明の一実施例をなすシート給送装Ｍを示し
たものであり、また第２図はその要部を示したものであ
る．
図において符号１は、後端を支点として上下に揺動し得
るようカセット２内に装着ざれたシ一ト載置板で、この
シ一ト載置板１はその下面に作用するばね３により常時
上向きに付勢されでいで、截置したシート、つまりカセ
ット内収納シートのうちの最上位のシ一トＳ１を、カセ
ット２の先端部上縛に設けた分離爪４の下面に当接ざせ
るよう押圧している．５はカセット２の開口部を覆う用
紙カバーで、この用紙カバー５は、その上部に若干の間
隙を設けられた手差しシート案内板６と協同して手差し
されたシ一トＳ２７ａプラテン７へ送り込むための案内
板としての機能をも備えたもので、その前端部には、後
述する絽紙ローラ１０、１０ｔ避ける凹部５ａが形成さ
れていで、給紙口−ラ１０、１０の間に突出した前端５
ｂは、給紙ローラ１０、１ｏの下方を通ってカセット２
の前縁近傍にまで延びでいる．
一方、図中符号１０で示した給紙ローラは、カセット内
収納シ一トｓｌ ！給送する機能と、手差しシ一トＳｚ
ｔ案内する機能を付与した本発明の特徴部分をなすもの
で、周知のＤ型給紙ローラと同様に、周面１０ａの一部
を平坦に切欠いて形成したこの給紙ローラ１０の切欠き
面１０ｂには、ステンレスもしくは四弗化エチレン等の
摩擦係数の小さな素材よりなる薄板１１が一体的（こ添
設ざれて、手差しシ一トＳ２の挿入案内面として構或ざ
れ、ざら（ここの薄板１１の両端は、切欠き面１０ｂか
ら周面１０ａの一部にまで延びていて、ゴム材等により
形成された給紙ローラ１０のエッジ部１０ｃの破損を抑
えるとともに、カセット内収納シ一トＳ，との間の円滑
な接触が図れるように構或ざれている．
１５は、給紙ローラ１０を常時手差しシ一トＳ２の案内
位置に停止させておくとともに、給紙指令信号が入力し
た際にはこの給紙ローラ１０を回転させるよう｛こ動作
するレバーで、このレバー１５は、給紙ローラ駆動軸１
２の軸端に固定したマガタマ型カム１３の周面に常時摺
接するように付勢されていて、係合突部１３ａと突当っ
てカム］３を停止ざせた待機の状態のもとでは、給紙口
−ラ１０の切欠き面１０ｂが第３図（ａ）に示したよう
に、手差しシ一トＳ２の挿入側に向けて上向きに傾斜し
た状態となるよう給紙ローラ１０を位置決めし、またソ
レノイド１７により一時的に吸引ざれた状態では、係合
突部１３ａとの係合を解いて給紙ローラ１０を一回転さ
せ、その周面１０ａによりカセット内収納シ一トＳ，を
給送ざせる動作を行わせるように構戊ざれている．なお
、図中符号８はカセット２とプラテン７との間に配設さ
れたシート案内板、９は印字ヘッドをそれぞれ示しでい
る．
このように構成ざれた装置において、カム１３の周面に
摺接するよう常時付勢ざれたレバー１５は、その先端を
カム１３の係合突部１３ａに当接ざせで、給紙口ーラ１
０を第３図（ａ）に示した位置、つまり、切欠き面１０
ａが手差しシ一トＳ２の挿入側に向けで上向き傾斜した
ような位置に停止させでいる．
この状態で、いま所望のシートにプリントすべく用紙カ
バー５と手差しシート案内板６の間に手差しシ一トｓｚ
！滑り込ませると、その先端は上向きに傾斜しでいる
給紙ローラ１０の切欠き面１０ａに突当り、その面に設
けた摩擦係数の小さな薄板１１により滑らかに導かれて
カセット内収納シ一トＳ１と同じシート案内板８に案内
ざれつつプラテン７のもとへと送り込まれる．また一方
、この待機の状態のもとて給紙指令信号が入力すると、
図示しないクラッチを介して給紙口ーラ軸１２に駆動力
が伝達ざれ、同時にソレノイド１７はカム１３との係合
を解くべくレバー１５を一時的に吸引する．これ｛こよ
り、第３図（ａ）の状態から図中矢印方向に回転を始め
た給紙ローラ１０は、はじめにそのエツジ１０ｃを最上
位のシ一トＳ１に当接ざせて適度の摩擦力によりこれを
押下げつつプラテン７に向けて送り出す（第３図（ １
） ））．そして、一回転して給紙ローラ１０の切欠き
面１０ｂが再び手差しシ一トＳ２の挿入案内位置に戻る
と、レバー１５の先端がカム１３の係合突起１３ａと当
接して給紙ローラ１０をこの位置に保持する．
なお上述した実施例では、待機時に給紙ローラ１０の切
欠き面１０ｂｔ手差しシ一トＳ２の挿入側に向けて上向
きに傾斜するよう係止する手段として、給紙ローラ駆動
軸１２上のカム１３をレバー１５によって係脱するよう
な機構を用いているが、給紙ローラ駆動軸１２の軸端に
、駆動軸１２自体もしくは駆動軸１２上のカムに作用し
て給紙ローラ］○を上記した位置に係止させ得るような
周知のクリック機構を設けるように構成しでもよく、こ
のように構成した場合には、装置をより簡素化すること
ができる．
（効果）
以上述べたように本発明によれば、Ｄ型給紙口−ラの切
欠き面を摩擦係数の小なる部材により被覆して、待機時
にはこの面が手差しシート挿入側に向けて上向き傾斜す
るよう給紙口ーラを係止するようにしたので、非給紙時
には収納シートと給紙口ーラとの接触を断ってシート上
にローラ痕を生じざせないといったＤ型給紙ローラ本来
の効果を奏する以外に、この給紙口ーラに設けた摩擦係
数の小さな切欠き面に沿わせて、手差しシートを収納シ
ートと同じ給送経路を経て記録書込み部へ送り込むこと
を可能となして、この種のプリンタ等の薄型化と部品点
数の大巾な削減を図ることができる．しかも、切欠き面
だけでなくその両側緯部分をも摩擦係数の小ざな部材に
よって被覆するようにしたので、摩擦係数の大きなゴム
等の素材により給紙口ーラを形成した場合でも、エッジ
部分の損傷が皆無となって、その耐用性を大巾に向上さ
せることができる．(Means for Solving the Problems) That is, the present invention is a sheet feeding device for achieving the purpose of edging, and a part of the circumferential surface of a paper feeding roller has a non-contact relationship with the stored sheets. The notch surface and both side edges are covered with a material with a small friction coefficient. This device is equipped with a locking part that positions the paper feed roller so that it can be tilted upward in a standby position. (Function) With this configuration, the sheet inserted from the manual sheet insertion section is guided to the same feeding path as the storage sheet along the notch surface with a small friction coefficient provided between the paper feed slot and the paper feed slot. can be sent to the record writing section. (Example) Therefore, the example illustrated below will be explained. FIG. 1 shows a sheet feeding device M which is an embodiment of the present invention, and FIG. 2 shows the main parts thereof. In the figure, reference numeral 1 denotes a sheet mounting plate installed in the cassette 2 so as to be able to swing up and down using the rear end as a fulcrum. The sheet S1, which is constantly biased upward, is brought into contact with the lower surface of the separation claw 4 provided at the top end of the cassette 2. I'm pressuring them to do so. Reference numeral 5 denotes a paper cover that covers the opening of the cassette 2. This paper cover 5 cooperates with a manual sheet guide plate 6 provided with a slight gap above the paper cover 5 to feed manually fed sheets S27a to the platen 7. It also has a function as a guide plate, and a recess 5a is formed at its front end to avoid the grated paper rollers 10 and 10t, which will be described later. 5
b passes below the paper feed rollers 10 and 1o to the cassette 2.
It extends to near the leading edge of. On the other hand, the paper feed roller indicated by the reference numeral 10 in the figure is located at the sheet sl! stored in the cassette. Feeding function and manual feed sheet Sz
The notch surface of this paper feed roller 10 is formed by flatly cutting out a part of the circumferential surface 10a, similar to the well-known D-type paper feed roller. 10b, a thin plate 11 made of a material with a small coefficient of friction such as stainless steel or tetrafluoroethylene is integrally attached to it and serves as an insertion guide surface for the manual sheet S2. Both ends of the paper feed roller 11 extend from the cutout surface 10b to a part of the circumferential surface 10a, and prevent damage to the edge portion 10c of the paper feed roller 10, which is made of a rubber material or the like. , 15 is designed to keep the paper feed roller 10 always stopped at the guide position of the manual feed sheet S2, and when a paper feed command signal is input. This lever operates to rotate this paper feed roller 10. This lever 15 is connected to the paper feed roller drive shaft 1.
Under the standby state in which the cam 3 is constantly urged to be in sliding contact with the circumferential surface of the cam 13 fixed to the shaft end of the cam 13, and the cam 3 is stopped by abutting against the engagement protrusion 13a. The paper feed roller 10 is positioned so that the cutout surface 10b of the paper feed roller 10 is inclined upward toward the insertion side of the manual feed sheet S2, as shown in FIG. 3(a). In addition, when the solenoid 17 is temporarily sucked, the paper feed roller 10 is rotated once by disengaging from the engagement protrusion 13a, and the sheet S, stored in the cassette is fed by the circumferential surface 10a. It is designed to perform the action to be sent. In the figure, reference numeral 8 indicates a sheet guide plate disposed between the cassette 2 and the platen 7, and 9 indicates a print head. In the device configured as described above, the lever 15, which is always biased so as to be in sliding contact with the circumferential surface of the cam 13, is moved from the paper feed slot roller 1 by bringing its tip into contact with the engaging protrusion 13a of the cam 13.
0 at the position shown in FIG. 3(a), that is, the notch surface 10
A is stopped in a position tilted upward toward the insertion side of the manual sheet S2. In this state, in order to print on a desired sheet, insert the manual sheet sz between the paper cover 5 and the manual sheet guide plate 6.
! When it is slid in, its tip hits the notched surface 10a of the paper feed roller 10 that is inclined upward, and is smoothly guided by the thin plate 11 with a small friction coefficient provided on that surface, and is then inserted into the cassette storage sheet S1. The sheet is fed to the platen 7 while being guided by the same sheet guide plate 8. On the other hand, if a paper feed command signal is input in this standby state,
A driving force is transmitted to the feed port roller shaft 12 via a clutch (not shown), and at the same time, the solenoid 17 temporarily attracts the lever 15 to disengage the cam 13. From this, the paper feed roller 10, which has started rotating in the direction of the arrow in the figure from the state shown in FIG. While pushing it down, send it out towards the platen 7 (Fig. 3 (1)
)))． Then, when the cutout surface 10b of the paper feed roller 10 returns to the insertion guide position of the manual sheet S2 after one rotation, the tip of the lever 15 comes into contact with the engagement protrusion 13a of the cam 13, and the paper feed roller 10 Hold it in this position. In the embodiment described above, the cam 13 on the paper feed roller drive shaft 12 is used as a means for locking the cutout surface 10b of the paper feed roller 10 so that it is tilted upward toward the insertion side of the manual sheet S2 during standby. A mechanism is used in which the lever 15 engages and disengages the paper feed roller, but the paper feed roller] ○ is attached to the shaft end of the paper feed roller drive shaft 12 by acting on the drive shaft 12 itself or a cam on the drive shaft 12. It may be configured to include a well-known click mechanism that can be locked in position, and if configured in this way, the device can be further simplified. (Effects) As described above, according to the present invention, the cutout surface of the D-shaped paper feed slot-R is covered with a member having a small friction coefficient, so that during standby, this surface faces upward toward the manual sheet insertion side. The D-type paper feed roller locks the paper feed slot roller so that it is tilted, so when paper is not being fed, the contact between the storage sheet and the paper feed slot roller is cut off, and no roller marks are left on the sheet. In addition to achieving the original effect, it is also possible to feed the manual sheet to the record writing section through the same feeding path as the storage sheet by following the notch surface with a small friction coefficient provided on this paper feed roller. As a result, this type of printer can be made thinner and the number of parts can be significantly reduced. Moreover, since not only the notch surface but also the latitudinal parts on both sides of the notch surface are covered with a member having a small coefficient of friction, even if the paper feed slot roller is formed of a material such as rubber with a high coefficient of friction, the edge part There is no damage at all, and its durability can be greatly improved.
第１図は本発明の一実施例を示す装置の側面図、第２図
は同上装置の要部を拡大して示した斜視図、第３図（ａ
）（ｂ）は手差しシートの挿入状態及び収納シートの給
送状態ヲ示した説明図である．
２・・・・カセット ５・・・・用紙カバー
６・・・・手差しシート案内板 ７・・・・プラテン１
０・・・・給紙口ーラ １０ｂ・・・・切欠き面
１０ｃ・・・・エッジ部
１１・・・・摩擦係数の小ざな素材よりなる薄板３・・
・・カム
１
５ ・・ ・・ レノ＼FIG. 1 is a side view of a device showing one embodiment of the present invention, FIG. 2 is a perspective view showing an enlarged main part of the same device, and FIG.
) and (b) are explanatory diagrams showing the insertion state of the manual feed sheet and the feeding state of the storage sheet. 2... Cassette 5... Paper cover 6... Manual feed sheet guide plate 7... Platen 1
0...Paper feed slot roller 10b...Notch surface 10c...Edge portion 11...Thin plate 3 made of a material with a small coefficient of friction...
・・Cam 1 5 ・・ Reno＼
Claims (1)
関係を持たす平坦な切欠き面を形成して、該切欠き面と
その両側縁部分を摩擦係数の小なる部材により被覆する
一方、給紙ローラ駆動軸には、上記切欠き面が手差しシ
ートの挿入側に向けて上向き傾斜するような待機姿勢を
採らすべく上記給紙ローラを位置決めする係止部を設け
たシート給送装置。A flat cutout surface that has a non-contact relationship with the stored sheets is formed on a part of the peripheral surface of the paper feed roller, and the cutout surface and both side edge portions thereof are covered with a member having a small coefficient of friction. , a sheet feeding device in which the sheet feeding roller drive shaft is provided with a locking portion for positioning the sheet feeding roller to take a standby posture in which the notched surface is inclined upward toward the manual sheet insertion side; .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1304445A JP2734694B2 (en) | 1989-11-21 | 1989-11-21 | Sheet feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1304445A JP2734694B2 (en) | 1989-11-21 | 1989-11-21 | Sheet feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03162333A true JPH03162333A (en) | 1991-07-12 |
| JP2734694B2 JP2734694B2 (en) | 1998-04-02 |
Family
ID=17933098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1304445A Expired - Lifetime JP2734694B2 (en) | 1989-11-21 | 1989-11-21 | Sheet feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2734694B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5746426A (en) * | 1993-12-22 | 1998-05-05 | Minolta Co., Ltd. | Feeding device having a feed roller with a low coefficient portion |
| JP2007238221A (en) * | 2006-03-06 | 2007-09-20 | Ricoh Co Ltd | Paper feeding device and image forming device |
-
1989
- 1989-11-21 JP JP1304445A patent/JP2734694B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5746426A (en) * | 1993-12-22 | 1998-05-05 | Minolta Co., Ltd. | Feeding device having a feed roller with a low coefficient portion |
| JP2007238221A (en) * | 2006-03-06 | 2007-09-20 | Ricoh Co Ltd | Paper feeding device and image forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2734694B2 (en) | 1998-04-02 |
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