JPH01156084A - Automatic paper supplying mechanism - Google Patents

Abstract

PURPOSE:To prevent paper jamming or double feeding from occurring and enhance reliability, by providing a slant surface form not parallel to the feeding direction of a recording paper, at a part in the vicinity of a friction member on a feeding passage for the recording paper for separating only one sheet of the recording paper. CONSTITUTION:When the tip of a plurality of sheets of recording papers fed to a separator 16 is curled or bent, separation of only one sheet of the recording paper from the recording papers by a friction member 18 mounted on the separator 16 may fail, and a plurality of sheets of the recording papers may be fed forward beyond a pressing part of a paper-supplying belt 13 and the friction member 18. In such a case, the plurality of the papers collide against a separating slant surface 30 provided on the separator 16 at a part on a feeding passage for the recording paper, only one sheet of the recording paper making contact with the belt 13 is separated by the compliance of the papers, and is fed to a paper guide 17 by riding over the slant surface 30. Thus, separation of the recording paper is securely carried out, and double feeding or paper jamming can be prevented from occurring.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、カット紙を使用するプリンタの自動給紙機構
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic paper feeding mechanism for a printer using cut paper.

〔従来の技術〕[Conventional technology]

従来の自動給紙機構の概略構成を第８図により説明する
。第８図に示す様に、記録紙Ｐ１と摩擦部材１８は、ば
ね部材１０１と１０２の附勢力により給紙ベルト１３に
押圧されており、給紙ベルト１３を矢印Ｅ方向に回転さ
せることにより１枚もしくは複数枚の記録紙Ｐ４が摩擦
部材１８まで搬送される。A schematic configuration of a conventional automatic paper feeding mechanism will be explained with reference to FIG. As shown in FIG. 8, the recording paper P1 and the friction member 18 are pressed against the paper feed belt 13 by the urging force of the spring members 101 and 102, and by rotating the paper feed belt 13 in the direction of arrow E, One or more recording sheets P4 are conveyed to the friction member 18.

複数枚送られた前記記録紙が前記摩擦部材１８によって
１枚だけ分離され、紙案内１７上を記録、装置内の紙送
り機構２９まで送られる。次いで給紙ベルト１３の回転
を止め、第９図に示す様に給紙ベルト１３への記録紙Ｐ
１と摩擦部材１８の押圧が図示なき解除手段によって解
除され自動給紙が終了する構造であった。A plurality of sheets of recording paper are fed, and only one sheet is separated by the friction member 18, recorded on the paper guide 17, and sent to a paper feeding mechanism 29 in the apparatus. Next, the rotation of the paper feed belt 13 is stopped, and the recording paper P is transferred to the paper feed belt 13 as shown in FIG.
1 and the friction member 18 are released by a release means (not shown), and the automatic sheet feeding ends.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、前述の従来技術においては以下の様な問
題があった。第８図において、給紙ベルト１３により摩
擦部材１８まで搬送された複数枚の記録祇Ｐ４の先端が
カールしていたり、折れ曲がっていた場合、摩擦部材１
８によって１枚だけ分離されるべき記録紙Ｐ３が分離さ
れず重送が起き紙ジヤムが発生する等の問題があった。However, the above-mentioned conventional technology has the following problems. In FIG. 8, if the tips of the plurality of recording sheets P4 conveyed to the friction member 18 by the paper feed belt 13 are curled or bent, the friction member 1
8, the recording paper P3, which should be separated one by one, is not separated, leading to double feeding and paper jams.

そこで本発明はこのような問題点を解決するもので、そ
の目的とするところは祇ジャムリや重送が起きない信頼
性の高い自動給紙機構を提供するところにある。The present invention is intended to solve these problems, and its purpose is to provide a highly reliable automatic paper feeding mechanism that does not cause jamming or double feeding.

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

本発明の自動給紙機構は、給紙ローラもしくは給紙ベル
ト等の給紙手段により複数枚送られた記録紙を１枚だけ
分離する記録紙搬送経路上の摩擦部材近傍の一部に、記
録紙搬送方向に対し平行でない斜面形状を設けたことを
特徴とする。The automatic paper feed mechanism of the present invention is capable of recording paper on a portion near a friction member on a paper transport path that separates only one sheet of paper from multiple sheets fed by a paper feed means such as a paper feed roller or a paper feed belt. It is characterized by providing a slope shape that is not parallel to the paper conveyance direction.

〔実施例〕〔Example〕

第１図から第７図により、本発明による自動給紙機構を
備えた熱転写プリンタの１実施例を説明する。第１図は
本発明による自動給紙機構を備えた熱転写プリンタの外
観を示しており、図中１はフロントパネル、２は操作ス
イッチ類、３はペーパードロア、４はフィルムカセット
ドア、５はスタッカ、６はケースである。第２図は熱転
写プリンタのメカ部分を第１図中矢印Ａ方向より見た断
面図である。Ｐｉは、ペーパードロア３に収納されてい
る記録前の紙、Ｐ２は記録終了後スタッカ７に収納され
た紙である。Ｑはインクフィルムで、供給コア８に未使
用のインクフィルムＱ１が、巻取りコア９に使用済みの
インクフィルムＱ２がそれぞれ巻付けられフィルムカセ
ット１０に収納されている。自動給紙機構は、給紙駆動
軸１１とアイドル軸１２との間に架は渡された給紙ベル
ト１３、ペーパードロア３に回転自在に取り付けられた
ホッパー１４、ばね部材１００の附勢力によりホッパー
１４を矢印Ｂ方向へ回転させるホンパーレバー１５、複
数枚給紙された紙を１枚だけ分離するためのセパレータ
１６及び摩擦部材１８、セパレータ１６を矢印Ｃ方向に
回転させるためのばね部材１０１及び紙案内１７により
構成されている。ばね部材１００の附勢力によりホッパ
ーレバー１５が矢印り方向に回転し、ホッパー１４が矢
印Ｂ方向に持ち上げられ記録紙Ｐ１が給紙ベルト１３に
押圧される。これと同時に、ばね部材１０１の附勢力に
よりセパレータ１６が矢印Ｃ方向へ回転し、セパレータ
１６上に取り付けられた摩擦部材１８が給紙ベル）１３
に押圧される。この状態で給紙駆動軸１１を図示なき駆
動手段により矢印Ｅ１方向に回転させることにより自動
給紙が開始される。第３図は複数枚給紙された紙を１枚
だけ分離する状態を示している。給紙ベル）１３の矢印
Ｅ１方向への回転により１枚もしくは複数枚の記録紙が
セパレータ１６まで送られる。給紙ベルト１３へのセパ
レータ１６の押圧部には摩擦部材１８が取り付けられて
おり、給紙ベル１−１３と紙との摩擦係数をμｍ、紙と
紙との摩擦係数をμ２、紙と摩擦部材１８との摩擦係数
をμ３とすると、μｍ・μ２・μ３の関係は、 μｍ〉μ３〉μ２ となっており、複数枚送られた記録紙は、セパレータ１
６上に取り付けられた摩擦部材１８上で給紙ベル）１３
に接している記録紙１枚だけが分離され紙案内１７へ送
られる。しかしながら、セパレータ１６まで送られた複
数枚の記録紙の先端がカールしていたり、折れ曲がって
いた場合、セパレータ１６上に取り付けられた摩擦部材
１８で複数枚の記録紙から１枚だけを分離することが出
来ず、給紙ベルト１３と摩擦部材１８との押圧部より先
へ複数枚の記録紙が搬送されてしまう場合がある。この
場合、セパレータ上でかつ記録紙搬送経路上の一部に設
けた分離斜面３０に複数枚送られた記録紙が度当たり、
記録紙のコシにより給紙ベルト１３に接している記録紙
１枚だけが分離され分離斜面３０を乗り越え紙案内１７
へ送られる。更に摩擦部材１８上で分離され紙案内１７
へ送られた記録紙が、第４図に示す様に主たる紙送り機
構を構成している紙送りローラ１９と紙押えローラ２０
に挟圧されるまで搬送され、給紙駆動軸１１の回転を止
め自動給紙が終了する。An embodiment of a thermal transfer printer equipped with an automatic paper feeding mechanism according to the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 shows the appearance of a thermal transfer printer equipped with an automatic paper feeding mechanism according to the present invention. In the figure, 1 is a front panel, 2 is an operation switch, 3 is a paper drawer, 4 is a film cassette door, and 5 is a stacker. , 6 are cases. FIG. 2 is a sectional view of the mechanical portion of the thermal transfer printer, viewed from the direction of arrow A in FIG. Pi is paper stored in the paper drawer 3 before recording, and P2 is paper stored in the stacker 7 after recording. Q is an ink film, and an unused ink film Q1 is wound around a supply core 8, a used ink film Q2 is wound around a winding core 9, and these are stored in a film cassette 10. The automatic paper feeding mechanism includes a paper feeding belt 13 that is stretched between a paper feeding drive shaft 11 and an idle shaft 12, a hopper 14 that is rotatably attached to the paper drawer 3, and a hopper that is loaded by the biasing force of a spring member 100. 14 in the direction of arrow B, a separator 16 and a friction member 18 for separating only one sheet of paper from a plurality of sheets fed, a spring member 101 and a paper guide for rotating the separator 16 in the direction of arrow C. 17. The biasing force of the spring member 100 rotates the hopper lever 15 in the direction of the arrow B, lifting the hopper 14 in the direction of the arrow B and pressing the recording paper P1 against the paper feed belt 13. At the same time, the separator 16 rotates in the direction of arrow C due to the biasing force of the spring member 101, and the friction member 18 attached to the separator 16 moves the paper feed bell) 13
Pressed by In this state, automatic paper feeding is started by rotating the paper feeding drive shaft 11 in the direction of arrow E1 by a drive means (not shown). FIG. 3 shows a state in which a plurality of sheets of paper are fed and only one sheet is separated. One or more recording sheets are fed to the separator 16 by rotation of the paper feed bell (13) in the direction of arrow E1. A friction member 18 is attached to the pressing part of the separator 16 against the paper feed belt 13, and the friction coefficient between the paper feed belt 1-13 and the paper is μm, the friction coefficient between the papers is μ2, and the friction between the paper and the paper is μm. If the coefficient of friction with the member 18 is μ3, the relationship between μm, μ2, and μ3 is μm>μ3>μ2, and multiple sheets of recording paper are sent to the separator 1.
6) on the friction member 18 mounted on the paper feed bell) 13
Only one sheet of recording paper that is in contact with is separated and sent to the paper guide 17. However, if the leading edges of the plurality of recording papers sent to the separator 16 are curled or bent, it is difficult to separate only one recording paper from the plurality of recording papers using the friction member 18 attached to the separator 16. This may result in a plurality of sheets of recording paper being conveyed beyond the pressing portion between the paper feed belt 13 and the friction member 18. In this case, a plurality of sheets of recording paper sent to the separation slope 30 provided on the separator and in a part of the recording paper conveyance path may hit each other.
Due to the stiffness of the recording paper, only one sheet of recording paper that is in contact with the paper feed belt 13 is separated and passes over the separation slope 30 and paper guide 17
sent to. Furthermore, it is separated on the friction member 18 and the paper guide 17
As shown in FIG. 4, the recording paper sent to the
The paper feed drive shaft 11 stops rotating and automatic paper feeding ends.

記録機構は、ヘッド２１と、プラテン２２と、レバー２
３及び２４に両端を回転自在に支持された押えローラ２
５及び２６と、ヘッド２１とレバー２３及び２４の支点
２７を有し、ヘッド２１と押えローラ２５及び２６をプ
ラテン２２に押圧すべくヘッド２１とレバー２３及び２
４に掛けられたばね部材１０２．１０３．１０４が取り
付けられ、図示なき駆動手段により矢印Ｈ方向及び矢印
■方向へ移動する移動フレーム２８から構成されている
。自動給紙終了後、図示なき手段にてホッパーレバー１
５を第４図中矢印Ｆ方向へ、またセパレータＩ６を矢印
Ｇ方向へ回転させ、給紙ベルト１３への記録紙Ｐ１及び
摩擦部材１８の押圧をそれぞれ解除すると同時に、図示
なき駆動手段にて移動フレーム２８を矢印１方向へ移動
し、プラテン２２にヘッド２１と押えローラ２５及び１
６を押圧することにより記録準備が終了する。The recording mechanism includes a head 21, a platen 22, and a lever 2.
Presser roller 2 rotatably supported at both ends by 3 and 24
5 and 26, and a fulcrum 27 for the head 21 and levers 23 and 24.
The moving frame 28 is attached with spring members 102, 103, and 104 hung on the frame 4, and is moved in the direction of the arrow H and the direction of the arrow {circle around (2)} by a driving means (not shown). After automatic paper feeding is completed, use unillustrated means to release hopper lever 1.
5 in the direction of arrow F in FIG. The frame 28 is moved in the direction of arrow 1, and the head 21 and presser rollers 25 and 1 are placed on the platen 22.
Recording preparation is completed by pressing 6.

第５図に記録開始時を示す。図示なき駆動手段により紙
送りローラ１９を矢印に１方向へ回転させ、自動給紙さ
れた記録紙Ｐ３を矢印Ｊ１方向に搬送すると同時に、図
示なき駆動手段にて巻取りコア９を矢印Ｎ方向へ回転さ
せインクフィルムＱを矢印Ｍ方向へ搬送しながら記録を
行なう。給紙された記録紙Ｐ３が矢印Ｊ１方向に搬送さ
れる際、摩擦部材１８まで送られている複数枚の記録紙
Ｐ４が記録紙Ｐ３との摩擦により矢印り方向に搬送され
ないよう、給紙駆動軸１１を矢印Ｅ２方向へ回転させて
いる。カラー給紙の場合、紙送りローラ１９を記録時に
は矢印に１方向に、祇戻し時には矢印に２方向に回転さ
せ、記録紙Ｐ３を矢印Ｊ１方向、矢印Ｊ２方向に所定量
だけ３回ないし４回往復させた後、記録紙Ｐ３を矢印Ｊ
１方向へ排紙し、記録紙Ｐ３の自重を用いて記録紙Ｐ３
をスタッカ７へ収納する。記録終了後、移動フレーム２
８を矢印Ｈ方向へ移動しメカ本体を第２図に示す初期状
態に戻す。第２図の状態は、記録紙Ｐ１及びインクフィ
ルムＱを収納しているフィルムカセットＩＯの交換時の
メカ状態でもあり、移動フレーム２８が矢印１方向に十
分に移動し、ヘッド２１と押えローラ２５及び２６はフ
ィルムカセット１０の交換の支障とならない位置にある
。FIG. 5 shows the start of recording. A drive means (not shown) rotates the paper feed roller 19 in the direction of the arrow, and at the same time, the automatically fed recording paper P3 is conveyed in the direction of the arrow J1, and at the same time, a drive means (not shown) moves the winding core 9 in the direction of the arrow N. Recording is performed while rotating and conveying the ink film Q in the direction of arrow M. When the fed recording paper P3 is conveyed in the direction of the arrow J1, the paper feed drive is performed so that the plurality of recording papers P4 that have been fed to the friction member 18 are not conveyed in the direction of the arrow due to friction with the recording paper P3. The shaft 11 is rotated in the direction of arrow E2. In the case of color paper feeding, the paper feed roller 19 is rotated in one direction when recording and in two directions when returning, and the recording paper P3 is rotated by a predetermined amount three or four times in the direction of arrow J1 and arrow J2. After reciprocating, move the recording paper P3 in the direction of arrow J.
Paper is ejected in one direction, and the paper P3 is loaded using its own weight.
is stored in the stacker 7. After recording, move frame 2
8 in the direction of arrow H to return the mechanism body to the initial state shown in FIG. The state shown in FIG. 2 is also the mechanical state when replacing the film cassette IO storing the recording paper P1 and the ink film Q, in which the movable frame 28 moves sufficiently in the direction of arrow 1, and the head 21, presser roller 25 and 26 is located at a position that does not interfere with the replacement of the film cassette 10.

第６図はメカ部が第２図の状態にて消耗品の交換方法を
示している。記録紙Ｐ１の交換及び補給は、ペーパード
ロア３を矢印Ｘ方向に引き出し記録紙をセットした後、
再びペーパードロア３を矢印Ｙ方向に押し込み行なう。FIG. 6 shows a method of replacing consumables with the mechanical section in the state shown in FIG. 2. To replace and replenish the recording paper P1, pull out the paper drawer 3 in the direction of arrow X, set the recording paper, and then
Push the paper drawer 3 in the direction of arrow Y again.

フィルムカセットｌＯの交換は、フィルムカセットドア
４を開き、フィルムカセット１０を矢印Ｘ方向に引き出
し、新しいフィルムカセットを矢印Ｙ方向に押し込みフ
ィルムカセットドア４を閉じる。また、記録終了法の記
録紙Ｐ２は第７図の様にスタッカドア５を開いて取り出
す。To replace the film cassette IO, open the film cassette door 4, pull out the film cassette 10 in the direction of arrow X, push in a new film cassette in the direction of arrow Y, and close the film cassette door 4. Further, the recording sheet P2 of the recording termination method is taken out by opening the stacker door 5 as shown in FIG.

〔発明の効果〕〔Effect of the invention〕

以上述べた様に、本発明によれば給紙ローラもしくは給
紙ベルト等の給紙手段により複数枚送られた記録紙を摩
擦部材により１枚だけ分離する際、記録紙搬送経路上の
摩擦部材近傍の一部に記録紙搬送方向に対し平行でない
斜面形状を設けていることにより、複数枚送られた記録
紙の先端がカールしていたり折れ曲がっていても記録紙
の分離が確実に行なわれ自動給紙時の重送及び祇ジャム
リを防ぐことが出来るという効果が期待出来る。As described above, according to the present invention, when a plurality of sheets of recording paper fed by a paper feeding means such as a paper feeding roller or a paper feeding belt are separated by a friction member, a friction member on the recording paper conveyance path is used. By providing a part of the vicinity with a slope that is not parallel to the recording paper conveyance direction, recording paper can be separated reliably and automatically even if the leading edge of multiple sheets of recording paper is curled or bent. This can be expected to have the effect of preventing double feeding and jamming during paper feeding.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の実施例における自動給紙機構を備え
た熱転写プリンタの外観を示す図である。 第２図から第５図は、本発明の実施例における自動給紙
機構を備えた熱転写プリンタの内部構造を示す図である
。 第６図は、本発明の実施例における自動給紙機構を備え
た熱転写プリンタの消耗品の交換を示す図である。 第７図は、本発明の実施例における自動給紙機構を備え
た熱転写プリンタの記録済の紙を取り出す方法を示す図
である。 第８図は、従来の自動給紙機構を説明する図である。 ｌ・・・フロントパネル ２・・・操作スイッチ類 ３・・・ペーパードロア ４・・・フィルムカセットドア ５・・・スタッカドア ６・・・ケース ７・・・スタッカ ８・・・供給コア ９・・・巻取りコア １０・・・フィルムカセット １１・・・給紙駆動軸 １２・・・アイドル軸 １３・・・給紙ベルト １４・・・ホッパー １５・・・ホッパーレバー １６・・・セパレータ １７・・・紙案内 １８・・・摩擦部材 １９・・・紙送りローラ ２０・・・紙押えローラ ２１・・・ヘッド ２２・・・プラテン ２３・・・レバー ２４・　・　・レバー ２５・・・押えローラ ２６・・・押えローラ ２７・・・支点 ２８・・・移動フレーム ２９・・・紙送り機構 ３０・・・分離斜面 １００・・・ばね部材 １０１　・　・　・ば、ね部材 １０２・・・ばね部材 １０３・・・ばね部材 １０４・・・ばね部材 Ｐ・・・記録紙 Ｑ・・・インクフィルム 以　　　上 出願人　セイコーエプソン株式会社FIG. 1 is a diagram showing the appearance of a thermal transfer printer equipped with an automatic paper feeding mechanism according to an embodiment of the present invention. 2 to 5 are diagrams showing the internal structure of a thermal transfer printer equipped with an automatic paper feeding mechanism according to an embodiment of the present invention. FIG. 6 is a diagram illustrating replacement of consumables in a thermal transfer printer equipped with an automatic paper feeding mechanism according to an embodiment of the present invention. FIG. 7 is a diagram showing a method for taking out recorded paper from a thermal transfer printer equipped with an automatic paper feeding mechanism according to an embodiment of the present invention. FIG. 8 is a diagram illustrating a conventional automatic paper feeding mechanism. l... Front panel 2... Operation switches 3... Paper drawer 4... Film cassette door 5... Stacker door 6... Case 7... Stacker 8... Supply core 9. ... Winding core 10 ... Film cassette 11 ... Paper feed drive shaft 12 ... Idle shaft 13 ... Paper feed belt 14 ... Hopper 15 ... Hopper lever 16 ... Separator 17 ... ... Paper guide 18 ... Friction member 19 ... Paper feed roller 20 ... Paper press roller 21 ... Head 22 ... Platen 23 ... Lever 24 ... Lever 25 ... Press roller 26... Presser roller 27... Fulcrum 28... Moving frame 29... Paper feeding mechanism 30... Separation slope 100... Spring member 101... Spring, spring member 102... Spring member 103...Spring member 104...Spring member P...Recording paper Q...Ink film or more Applicant: Seiko Epson Corporation

Claims (2)

【特許請求の範囲】[Claims] （１）複数枚の記録紙を少なくとも１つ以上の給紙ロー
ラもしくは給紙ベルト等の給紙手段に押圧し、記録装置
内に備えられた紙送り機構まで前記記録紙を押圧部材と
摩擦部材との間に挟圧し１枚毎給紙する自動給紙機構に
おいて、前記記録紙搬送経路上の前記摩擦部材近傍の一
部に前記記録紙搬送方向に対し平行でない斜面形状を設
けたことを特徴とする自動給紙機構。(1) Press a plurality of sheets of recording paper against at least one paper feeding means such as a paper feeding roller or a paper feeding belt, and move the recording paper to a paper feeding mechanism provided in the recording device using a pressing member and a friction member. In the automatic paper feeding mechanism that feeds sheets one by one by pressing the recording paper between the recording paper and the recording paper, the automatic paper feeding mechanism is characterized in that a part of the recording paper transport path near the friction member is provided with a slope shape that is not parallel to the recording paper transport direction. Automatic paper feeding mechanism. （２）前記押圧部材が前期給紙ローラもしくは前記給紙
ベルトから構成されていることを特徴とする特許請求の
範囲第１項記載の自動給紙機構。(2) The automatic paper feeding mechanism according to claim 1, wherein the pressing member is constituted by the paper feeding roller or the paper feeding belt.