JPS58179673A - Paper guiding mechanism - Google Patents

Paper guiding mechanism

Info

Publication number
JPS58179673A
JPS58179673A JP3800582A JP3800582A JPS58179673A JP S58179673 A JPS58179673 A JP S58179673A JP 3800582 A JP3800582 A JP 3800582A JP 3800582 A JP3800582 A JP 3800582A JP S58179673 A JPS58179673 A JP S58179673A
Authority
JP
Japan
Prior art keywords
printing
paper
print head
tip
guide
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.)
Pending
Application number
JP3800582A
Other languages
Japanese (ja)
Inventor
Kenichiro Takezawa
竹沢 健一郎
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3800582A priority Critical patent/JPS58179673A/en
Publication of JPS58179673A publication Critical patent/JPS58179673A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04Supporting, feeding, or guiding devices; Mountings for web rolls or spindles

Landscapes

  • Handling Of Continuous Sheets Of Paper (AREA)

Abstract

PURPOSE:To permit clear printing operation by keeping the distance between a printing paper and a printing head at a given one by providing two kinds of guiders to press the printing paper on the platen side on the printing head side. CONSTITUTION:The first paper guider 5 is provided below the tip of a printing bead 3. In this case, the first guider 5 is provided on the platen side slightly projectionally from the tip of the printing head 3 in such a way that it is contacted with a printing paper 1 is not contacted with the tip of the printing head 3. Further, the second paper guider 6 is set on any of left and right sides in proximity to the printing head 3. The second guider 6 serves to press the fold of the printing paper 1 on the platen 2. These giders 5 and 6 are particularly effective for printers in which distance between the printing head 3 and the printing paper 1 on the palten 2 is small, as in on-demoand type ink jet printer.

Description

【発明の詳細な説明】 発明の分ポf 本発明は用紙案内機構に係シ、特に印字用紙面と印字ヘ
ッドの間隔が充分に取れないオンデマンド形インクジェ
ットプリンタにおける用紙案内イ幾構に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper guiding mechanism, and more particularly to a paper guiding mechanism in an on-demand type inkjet printer in which a sufficient distance between the printing paper surface and the print head cannot be maintained.

従来技術 従来、この種のインクジェットプリンタにおいて印字ヘ
ッドと印字用紙を離間するために、印字用紙を印字位置
の前後でローラあるいは抑圧板などによりプラテンに押
しつけ、印字位置で印字用紙がプラテンから浮きあがる
ことを防止する用紙案内機構が知らilている。この方
法ではロール紙あるいは単票のような平坦でくせのない
印字用紙に対しては効果が得られる。しかし乍ら、折シ
畳まれた印字用紙を使用した場合に、折シ目の山部が改
行時に印字位置にさしかかると、印字用紙の剛性に起因
して用紙がプラテンから浮きあがったシ、印字ヘッド先
端に接触して印字用紙の汚れが発生したりする。更に不
具合な場合には、印字ヘッド先端にまで導かれているイ
ンフケ引き出してしまうことになる。これでは、印字ヘ
ッド先端は不必要なインク層で覆われてしまい、印字不
能を発生させる恐れがおる。この様に、ドロ、ジオンデ
マンド形の印字ヘッドのようにインク滴をインク室の圧
力変動で飛翔させる方式の場合には、原理的に印字用紙
と印字ヘッドの先端が約II+lIK程度、大きくて2
1m8度しかとれず、上記印字用紙の浮さあがりに対し
ては特に影41を受は易い。
Prior Art Conventionally, in this type of inkjet printer, in order to separate the print head from the print paper, the print paper is pressed against the platen by rollers or suppression plates before and after the printing position, and the print paper is lifted from the platen at the print position. Paper guide mechanisms are known that prevent this. This method is effective for flat, smooth printing paper such as roll paper or cut sheets. However, when using folded printing paper, if the peak of the fold reaches the printing position at the time of line feed, the paper may lift up from the platen due to the rigidity of the printing paper, and the printing may occur. Contact with the tip of the head may cause stains on the printing paper. If there is a further problem, the dandruff that has been led to the tip of the print head may be pulled out. In this case, the tip of the print head will be covered with an unnecessary ink layer, which may cause printing to become impossible. In this way, in the case of a method in which ink droplets are ejected by pressure fluctuations in the ink chamber, such as the Dro-On-Demand type print head, in principle the print paper and the tip of the print head are approximately II + lIK, at most 2
It can only cover 1 m 8 degrees, and the shadow 41 is particularly easy to receive when the printing paper is lifted up.

発明の目的 本発明の目的は、印字用紙と印字ヘッドの間隔が比較的
狭いプリンタにおいて、印字用紙が印字ヘッド先端に接
触して汚れた)、印字不能を発生したすすることを防止
する。簡単でかつ有効な印字ヘッド用の用紙案内機構を
提供することにある。
OBJECTS OF THE INVENTION An object of the present invention is to prevent the printing paper from coming into contact with the tip of the print head and becoming dirty, which may cause printing failure, in a printer in which the distance between the print paper and the print head is relatively narrow. An object of the present invention is to provide a simple and effective paper guide mechanism for a print head.

印字用紙がプラテンから浮き上らないようにするには用
紙な何らかの部材でプラテンに押しつける方法が簡単で
確実な方法である。例えばインクジェットプリンタでは
印字直後は印字用紙上のインクがまた乾燥しておらず、
印字後の部分を押えるとインクがすれて紙面を汚してし
まう。印字前の部分を押えねば若干効果は有るものの、
折りAまれた用紙の折シ目に対しては効果が不充分であ
るため、本発明のガイドは有効な手段となる。
A simple and reliable way to prevent printing paper from lifting off the platen is to press it against the platen with some kind of member, such as paper. For example, in an inkjet printer, immediately after printing, the ink on the printing paper has not yet dried.
If you press down on the area after printing, the ink will rub off and stain the paper surface. Although it is somewhat effective if you press the part before printing,
The guide of the present invention is an effective means because the effect is insufficient for the creases of A-folded paper.

発明の実施例 以下、本発明の−゛J8.J8.施例乃至第3図によジ
説明する。印字用7砥1けプラテン2と印字ヘッド30
間に挿入ちれ、印字ヘッド3より噴射されるインク滴に
よシ印刷がなされる。印字ヘッド6けキャリジ4に塔載
され行方向に走行する。印字用紙1は各行の印字が終了
する毎にローラあるいはフオームトラクタ(図示せず)
などの既知の方法により改行式れる。5は印字ヘッドの
先端下側に設置された第1の用紙ガイドであシ、印字式
ネる文字の下側の部分で印字用紙1に接し、印字用紙1
が印字ヘッド3の先端に接することのないよう印字ヘッ
ド3の先端よシ若かにプラテン側に突出している。但し
突出fitは印字用紙1ケノラテン2に押しつけること
のない程度でおって、プラテン5と第1のガイド5との
間に印字用紙1よシ若干大きなキャ   1ノブができ
るように設定されでいる。これにより第1のガイド5は
印字用紙1の改行時、摩擦負荷となることが無い。
EXAMPLES OF THE INVENTION Hereinafter, examples of the present invention will be described. J8. An example will be explained with reference to FIG. 7-grit 1 platen 2 and print head 30 for printing
Printing is performed using ink droplets ejected from the print head 3 after insertion. The print head is mounted on a six-carriage 4 and travels in the row direction. The printing paper 1 is moved by a roller or form tractor (not shown) every time printing of each line is completed.
Line break expressions can be created using known methods such as 5 is the first paper guide installed at the bottom of the tip of the print head.
The tip of the print head 3 protrudes slightly toward the platen side so that it does not come into contact with the tip of the print head 3. However, the protruding fit is set to such an extent that the print paper 1 is not pressed against the platen 2, and is set so that a knob slightly larger than the print paper 1 is formed between the platen 5 and the first guide 5. As a result, the first guide 5 is not subject to any frictional load when the printing paper 1 is line-feeded.

6F′i第2の用紙ガイドで1L印字ヘッド3に近接し
て両側あるいは左右片側いずれかに設品式れる。第2の
ガイド6は印字中は第1のガイド5か印字用紙1を印字
へラド6がら遠ざけるよう作用しているため印字用紙1
と接触することはほとんどない。もし第2のカイドロが
印字用紙1と接触していると、印字後まだ乾燥していな
い紙面上のインクを印字ヘッド6の走行に伴ってこ丁っ
てしまい紙面を汚してしまうことになる。しかしながら
印字用紙1が折シ畳まれた形状のものである場合、折り
目の山の部分7は印字用紙1をプラテン2に押しつける
手段の有無に関わらず用紙自体の剛性のためにプラテン
から看干浮きあがってしまう。インクジェットプリンタ
の種類によってはこの程度の用紙の浮きあがりは無視で
きるものもある。しかしドロップオンデマンド形と称さ
れる方式の印字ヘッドにおい工は原理的に印字用紙面と
印字ベ 4 ゛ ラド先端の距離が充分にとれないため、前述のようなわ
ずかな用紙の浮きあがシによシ、用紙と印字ヘッド先端
が接触してしまい各種の不具合が発生する。前述の第1
のサイド5も折シ目の山部に対しては印字ヘッド3の先
端に接触することを防止することはできない。この状態
を第3図に示す。第2のガイド6はこのような状態にお
いて印字用紙1と印字ヘッド3の先端が接触することを
防止するために存在する。したがって第2のガイド6の
先端の位aは第1のガイド5よシは印字ヘッド6の先端
に近く、かつ印字ヘッド3の先端よりはプラテン2に近
い位置に設けられなけわばならない。
6F'i The second paper guide is installed close to the 1L print head 3 on both sides or on either the left or right side. During printing, the second guide 6 acts to move the first guide 5 or the printing paper 1 away from the rad 6 toward printing, so the printing paper 1
There is very little contact with. If the second roller is in contact with the printing paper 1, the ink on the paper surface that has not yet dried after printing will be collected as the print head 6 moves, staining the paper surface. However, when the printing paper 1 is in a folded shape, the ridges 7 of the folds will float away from the platen due to the rigidity of the paper itself, regardless of the presence or absence of a means for pressing the printing paper 1 against the platen 2. I'm going up. Depending on the type of inkjet printer, this level of paper lifting can be ignored. However, in principle, the so-called drop-on-demand type print head odor cannot maintain a sufficient distance between the printing paper surface and the print head tip, so the slight lifting of the paper as mentioned above may occur. Otherwise, the paper and the tip of the print head may come into contact, causing various problems. The first mentioned above
It is not possible to prevent the side 5 from coming into contact with the tip of the print head 3 at the peak of the crease. This state is shown in FIG. The second guide 6 exists to prevent the printing paper 1 from coming into contact with the tip of the print head 3 in such a state. Therefore, the tip a of the second guide 6 must be located closer to the tip of the print head 6 than the first guide 5, and closer to the platen 2 than the tip of the print head 3.

もし、印字方向が一方向のみであれば第2のガイド6を
印字ヘッド3の印字時の進行方向の前側にのみ設ければ
ガイド6が印字後未乾燥のインクを引きずって紙面を汚
すことはないので。
If the printing direction is only one direction, if the second guide 6 is provided only on the front side of the printing head 3 in the printing direction, the guide 6 will not drag undried ink after printing and stain the paper surface. Since there is no.

第1のサイド5は不要となる。しかし、印字装置として
処理速度を向上させるため両方向印字を行なう場合、印
字ヘッド5の左右どちらかあるいは両側に第2のガイド
6を設けると、印字後の未乾燥のインクを引きすること
になるため、印字位置の下側で印字用紙に接する第1の
ガイドが必要になる。
The first side 5 is no longer needed. However, when performing bidirectional printing to improve the processing speed of the printing device, if the second guide 6 is provided on either the left or right side of the print head 5, or on both sides, the undried ink after printing will be drawn. , a first guide that contacts the printing paper below the printing position is required.

発明の効果 以上の如く本発明によねば第1のガイド及び第2のガイ
ドな印字ヘッドに具備することにより、比較的印字ヘッ
ドと印字用紙面の距離が狭いドロップオンデマンド形の
ようなインクジェットプリンターにおいても、用紙汚れ
や印字ヘッド先端のインクだま如による印字不能を発生
することなく、折り畳まれたくせのある印字用紙に印字
することが可能となる。
Effects of the Invention As described above, according to the present invention, by providing a first guide and a second guide in the print head, an inkjet printer such as a drop-on-demand type in which the distance between the print head and the printing paper surface is relatively narrow can be obtained. Even in this case, it is possible to print on a folded and curly printing paper without inability to print due to paper stains or ink smudges on the tip of the print head.

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

第1図は本発明の一実施例による側面図、第2図はヘッ
ド先端部の斜視図、第3図は印字用紙の折シ目の山の部
分が改行により印字ヘッドに接している状態を示す図。 1・・・印字用紙、    2・・・プラテン、5・・
・印字ヘッド、   4・・・キャリジ、5・・・第1
のガイド、   6・・・第2のガイド、7・・・用紙
の折り目。 ( 代理人弁理士 薄 1)利 ポ
Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a perspective view of the head tip, and Fig. 3 shows the state in which the peak of the fold of the printing paper is in contact with the print head due to a line break. Figure shown. 1...Print paper, 2...Platen, 5...
・Print head, 4... Carriage, 5... First
guide, 6... second guide, 7... fold of paper. (Representative Patent Attorney Susuki 1) Lipo

Claims (1)

【特許請求の範囲】[Claims] (1)  行方向に印字−\ノドを走行させながら該印
字ヘッドによって印字用紙に文字、図形等を印字するシ
リアルプリンタにおいて、印字ヘッドの先湘部にあって
、印字用紙を印字ヘッドから遠ざかる方向に理し印字ヘ
ッド先端と印字用紙を離間する第1のガ・1ドと、該印
字ヘッド側部の両wJt−たけ片側にあって印字ヘッド
先端部より突出し、該第1のガイドより後退した位置で
印字用紙が印字ヘッド先端部に接触するのを防止する第
2のガイドを有することを特徴とする用紙案内機構。
(1) Printing in the line direction - In a serial printer that prints characters, figures, etc. on print paper with the print head while running the throat, the direction in which the print paper moves away from the print head at the leading edge of the print head A first guide that separates the tip of the print head from the printing paper, and a guide that is located on one side of the print head and protrudes from the tip of the print head and is retracted from the first guide. A paper guide mechanism characterized by having a second guide that prevents the print paper from coming into contact with the print head tip at the position.
JP3800582A 1982-03-12 1982-03-12 Paper guiding mechanism Pending JPS58179673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3800582A JPS58179673A (en) 1982-03-12 1982-03-12 Paper guiding mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3800582A JPS58179673A (en) 1982-03-12 1982-03-12 Paper guiding mechanism

Publications (1)

Publication Number Publication Date
JPS58179673A true JPS58179673A (en) 1983-10-20

Family

ID=12513452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3800582A Pending JPS58179673A (en) 1982-03-12 1982-03-12 Paper guiding mechanism

Country Status (1)

Country Link
JP (1) JPS58179673A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233570A (en) * 1985-04-10 1986-10-17 Tokyo Electric Co Ltd Printing apparatus
JPH0222847U (en) * 1988-07-29 1990-02-15
EP1221378A2 (en) * 1996-01-22 2002-07-10 Copyer Co., Ltd. Ink-jet image forming device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233570A (en) * 1985-04-10 1986-10-17 Tokyo Electric Co Ltd Printing apparatus
JPH0222847U (en) * 1988-07-29 1990-02-15
EP1221378A2 (en) * 1996-01-22 2002-07-10 Copyer Co., Ltd. Ink-jet image forming device
EP1221378A3 (en) * 1996-01-22 2002-08-21 Copyer Co., Ltd. Ink-jet image forming device

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