JPS6354252A - Ink jet recorder - Google Patents
Ink jet recorderInfo
- Publication number
- JPS6354252A JPS6354252A JP19962686A JP19962686A JPS6354252A JP S6354252 A JPS6354252 A JP S6354252A JP 19962686 A JP19962686 A JP 19962686A JP 19962686 A JP19962686 A JP 19962686A JP S6354252 A JPS6354252 A JP S6354252A
- Authority
- JP
- Japan
- Prior art keywords
- air
- opening
- ink
- discharge port
- head
- 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
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract 2
- 239000000126 substance Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 14
- 238000012856 packing Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- -1 dirt Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16552—Cleaning of print head nozzles using cleaning fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/20—Ink jet characterised by ink handling for preventing or detecting contamination of compounds
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、微小開口よりインクを吐出させ被記録物に文
字、画像、マーク等を記録するインクジエツト記録装置
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an inkjet recording device that records characters, images, marks, etc. on a recording material by ejecting ink from a minute opening.
従来の技術
′＠２図は特開昭５７−１２０４５２号公報に記載され
たインクジェット記録装置を示しており、空気流と静電
力を利用したものである。常時空気流が流出している空
気吐出口２がインク吐出口１に対向して設置され、空気
吐出口２の前面に設けられた電極３により生じる静電力
と前記空気流による加速力の相乗効果によってインクを
吐出させるものである。Background Art '@2 Figure 2 shows an inkjet recording apparatus described in Japanese Patent Laid-Open No. 57-120452, which utilizes air flow and electrostatic force. An air discharge port 2 from which air flows out at all times is installed opposite the ink discharge port 1, and a synergistic effect of the electrostatic force generated by the electrode 3 provided in front of the air discharge port 2 and the accelerating force caused by the air flow. This is to eject ink.
発明が解決しようとする問題点
第３図は、第２図に示されたインクジェットヘッドのイ
ンクが吐出し記録される部分を拡大図示したものである
。インク吐出口１内に保持されているインクは、電極３
とインクとの間に印加される電位差によって引き出され
、空気流による加速を受けながら空気吐出口２を通過し
、記録紙４上に付着する。このようなり理で動作するイ
ンクジェット記録ヘッドでは、空気吐出口２の穿孔され
たノズル板の表面、すなわち電極３の設置されだ面に、
塵、ゴミやインクが付着し、インクの吐出状態が不安定
になることがある。さらに詳細に述べると、塵やインク
が空気吐出口２の出口周辺に付着すると、空気流の流れ
に乱れが生じたり、あるいは、電極３によって生じてい
る電界の状態が変化することによって、インク吐出口１
よシのインクの吐出方向に曲りが生じたね、あるいは、
インクが空気吐出口２を正常な状態で通過できず、空気
吐出口２内に付着するような現象が生じ、期待した記録
画像が得られなくなる。Problems to be Solved by the Invention FIG. 3 is an enlarged view of a portion of the inkjet head shown in FIG. 2 where ink is ejected for recording. The ink held in the ink discharge port 1 is transferred to the electrode 3
The ink is drawn out by the potential difference applied between the ink and the ink, passes through the air outlet 2 while being accelerated by the air flow, and is deposited on the recording paper 4. In an inkjet recording head that operates according to this principle, on the surface of the nozzle plate where the air discharge ports 2 are perforated, that is, on the surface where the electrodes 3 are installed,
Dust, dirt, and ink may adhere to the printer, making the ink ejection condition unstable. More specifically, if dust or ink adheres to the area around the outlet of the air discharge port 2, it may cause turbulence in the air flow or change the state of the electric field generated by the electrode 3, causing ink discharge. Exit 1
There is a bend in the ejection direction of the ink, or
A phenomenon occurs in which the ink cannot pass through the air outlet 2 in a normal state and adheres inside the air outlet 2, making it impossible to obtain the expected recorded image.
このように電極３上に付着する物質は、何らかの原因で
、記録紙上に付着せずに浮遊した微小インク小滴や、空
気中に浮遊している塵やゴミ、あるいは記録紙より放出
される紙粉等であるが、これらが電極３上に付着する原
因は、電極３によって生じる静電力によりこれらが吸着
することによっているが、空気吐出口２より流出する空
気流の流れの状態にも依存している。Substances that adhere to the electrode 3 in this way may be minute ink droplets that float without adhering to the recording paper for some reason, dust or dirt floating in the air, or paper emitted from the recording paper. The reason why these particles adhere to the electrode 3 is that they are attracted by the electrostatic force generated by the electrode 3, but it also depends on the state of the airflow flowing out from the air outlet 2. ing.
空気吐出口２より流出する空気流は通常１００ｒｎ／Ｓ
前後の非常に高速な流れであるが、この空気流は非常に
大きな衝撃力で記録紙４に衝突し、四方に拡散される。The airflow flowing out from the air outlet 2 is normally 100rn/S.
This airflow, which flows back and forth at a very high speed, collides with the recording paper 4 with a very large impact force and is dispersed in all directions.
この時の衝撃力は記録紙上の塵やコ゛ミや粉を吹き飛ば
し空気中に浮遊させる原因となる。また一方、空気吐出
口２の出口周辺では第３図の矢印５で示されているよう
に、空気吐出口２からの急激な空気の流出に伴って、空
気吐出口２の周辺の空気が巻き込まれ、うす状の空気の
流れが生じる。この結果、矢印６で示されるような対流
が生じ、微小インク小滴や、塵等が、電極３の方向に運
ばれることになり、多数の塵やインクが空気吐出口２の
周辺に付着しやすくなる。The impact force at this time causes dust, dirt, and powder on the recording paper to be blown away and suspended in the air. On the other hand, around the outlet of the air outlet 2, as shown by the arrow 5 in FIG. This creates a thin air flow. As a result, convection as shown by arrow 6 occurs, and minute ink droplets, dust, etc. are carried in the direction of electrode 3, and a large amount of dust and ink adheres to the area around air outlet 2. It becomes easier.
本発明はこのような塵やゴミ、インクなどが空気吐出口
周辺に付着することを防止することを目的とするもので
ある。The object of the present invention is to prevent such dust, dirt, ink, etc. from adhering to the vicinity of the air discharge port.
問題点を解決するための手段
本発明は、このような問題点を解決するため、前記空気
吐出口２の前面に、それより大きな開口を設け、この開
口より清浄な空気を流出させるものでちる。Means for Solving the Problems In order to solve these problems, the present invention provides a larger opening in the front of the air outlet 2 and allows clean air to flow out through this opening. .
作用
上記手段によれば、空気吐出口２の周辺には常に、清浄
な空気が供給されるため、空気吐出口２より高速に流出
する空気流は、この清浄な空気を巻き込みながら噴出す
るようになり、微小インク粒子や塵、ゴミ、紙粉等を浮
遊させている外気の対流は空気吐出口２の前面に設置さ
れた開口より流出する清浄な空気によって遮断され、電
極３の設置された面までは届かなくなり、空気吐出口２
の周辺に塵、ゴミ、インク等がｈｔ着するのを防ぐこと
ができる。According to the above means, clean air is always supplied around the air outlet 2, so that the air flow flowing out from the air outlet 2 at a high speed is ejected while entraining this clean air. Therefore, the convection of the outside air that suspends minute ink particles, dust, dirt, paper powder, etc. is blocked by the clean air flowing out from the opening installed in the front of the air outlet 2, and the surface where the electrode 3 is installed is blocked. air outlet 2.
This can prevent dust, dirt, ink, etc. from accumulating around the area.
実施例
第１図は本発明の１実施例を示す。インクジェットヘッ
ドの空気吐出口２の直径は約０．１ｎｍ＋であり、これ
に対向して径約１．０順の開ロアを設置しである。この
開ロアを有する板１４は、インクジェットヘッド１１を
保持するためのヘンドホルダ１２と一体化されており、
開ロアより流出される清浄な空気は、インクジェットヘ
ッド１１をヘッ′ドホルダ１２にナツト１５で取付ける
ことによって形成される空気室８を介して送られる。な
お、空気室８が十分密閉された部屋となるようインクジ
ェットヘッド１１はパツキン９を介してヘッドホルダ１
２に１１１寸けられる。空気吐出口２より流出する高速
な空気流は１００ｍ／ＳＩ′ｉ′Ｉ後であシ、空気供給
源１３の圧力を０．０８〜Ｏ，１５ｋｇ／ａｄに調整し
て供給されるが、ここでは、開ロアより流出する空気流
を同一空気供給源１３よυ供給できるよう、圧力調整弁
１０より放出されるべき空気流を前記空気室８に導き、
開ロアよシ流出させた。Embodiment FIG. 1 shows one embodiment of the present invention. The diameter of the air discharge port 2 of the inkjet head is approximately 0.1 nm+, and an open lower portion having a diameter of approximately 1.0 nm is installed opposite to this. The plate 14 having the open lower part is integrated with the hand holder 12 for holding the inkjet head 11.
Clean air flowing out from the open lower part is sent through an air chamber 8 formed by attaching the inkjet head 11 to the head holder 12 with a nut 15. Note that the inkjet head 11 is attached to the head holder 1 via a gasket 9 so that the air chamber 8 is sufficiently sealed.
111 sun was added to 2. The high-speed air flow flowing out from the air outlet 2 is supplied after 100 m/SI'i'I, and the pressure of the air supply source 13 is adjusted to 0.08 to 15 kg/ad. Then, the air flow to be released from the pressure regulating valve 10 is guided to the air chamber 8 so that the air flow flowing out from the open lower can be supplied to the same air supply source 13.
I let the open lower part leak out.
開ロアを形成する板１４は極力塵やゴミのけ着を避ける
ため、不活性物質であるテフロンのコーティングを施し
たものを使用した。The plate 14 forming the open lower part was coated with Teflon, which is an inert substance, in order to avoid dust and dirt from being thrown off as much as possible.
以上のような構成で、開ロアより数ｍ／Ｓの清浄な空気
流を流出させながら記録紙４に長時間記録実験を行った
ところ、電極３および空気吐出口２０周辺には全く塵、
ゴミ、インク等による汚れが生じなかった。したがって
長期間にわたって安定なインクの吐出がなされた。With the above configuration, when we conducted a long recording experiment on the recording paper 4 while flowing a clean air flow of several m/s from the open lower, we found that there was no dust or dirt around the electrode 3 and the air outlet 20.
There was no staining caused by dust, ink, etc. Therefore, stable ink ejection was achieved over a long period of time.
ただ、開ロアの前面には、紙粉やインク等の汚れが見ら
れ、長い期間での安定を計るためには、開ロアの前面を
洗浄あるいは拭く機構によりクリーンにする必要があっ
た。However, the front surface of the opening lower door was contaminated with paper powder, ink, etc., and in order to ensure long-term stability, it was necessary to clean the front surface of the opening lower door using a cleaning or wiping mechanism.
また非使用時で、空気流の流れがない時に、開ロアよシ
異物が進入し、インクジェットヘッド１１の前面に寸前
するのを防ぐため非使用時に開ロアを閉塞するキャップ
手段を設けることは長期間の安定性をさらに向上させる
。Furthermore, in order to prevent foreign matter from entering the open lower door and approaching the front surface of the inkjet head 11 when the open lower door is not in use and there is no airflow, it is a long time to provide a cap means to close the open lower door when the open lower door is not in use. Further improve period stability.
またさらに、偶発的に発生する空気吐出口２周辺の汚れ
を除去するため、開ロアを有する板とインクジエツトヘ
ッド１１前面との間隙に洗浄液を送り、空気流の流れに
よって洗浄液を排出させながら、インクジェットヘッド
１工の前面をクリーニングすれば、ヘッド性能の回復が
容易になされ、長期間にわたる信頼性が保てる。Furthermore, in order to remove dirt around the air discharge port 2 that occurs accidentally, a cleaning liquid is sent to the gap between the plate having the open lower part and the front surface of the inkjet head 11, and while the cleaning liquid is discharged by the flow of air, By cleaning the front surface of an inkjet head, head performance can be easily restored and long-term reliability can be maintained.
発明の効果
以上のように、本発明は空気流の流出する空気吐出口に
対向してインク吐出口を有し、インク吐出側に空気吐出
口より大なる開口を対向設置し、この開口より空気流を
流出させるよそにしたインクジェット記録装置で、空気
吐出口周辺および電極近辺に塵やゴミ、インクなどの汚
れが生じず長期間にわたって安定なインク吐出を行うこ
とができる。Effects of the Invention As described above, the present invention has an ink discharge port opposite to the air discharge port through which the air flow flows out, and an opening larger than the air discharge port is installed oppositely on the ink discharge side, and air is discharged from this opening. An inkjet recording device with a separate inkjet recording device that allows the flow to flow out allows stable ink ejection over a long period of time without causing dust, dirt, ink, or other contamination around the air ejection ports and near the electrodes.
第１図は本発明によるインクジェット記録装置の１実施
例を示す一部断面図、第２図は、本発明の適用される従
来のインクジェット記録装置を示す一部断面図、第３図
は第２図の一部拡大図である。
ｌ・・・インク吐出口、２・・空気吐出口、３・・・電
極、７・・・開口。FIG. 1 is a partial cross-sectional view showing one embodiment of an inkjet recording apparatus according to the present invention, FIG. 2 is a partial cross-sectional view showing a conventional inkjet recording apparatus to which the present invention is applied, and FIG. It is a partially enlarged view of the figure. l...Ink discharge port, 2...Air discharge port, 3...Electrode, 7...Opening.
Claims (1)
インク吐出口を設け、インク吐出口内のインクと、前記
空気吐出口に設けられた電極との間に電位差を印加する
ことによりインクを前記空気吐出口より吐出させる手段
と、前記空気吐出口の空気の流出側に、空気吐出口より
大なる開口を対向設置し、この開口より空気流を流出さ
せる手段とを有することを特徴とするインクジェット記
録装置。 ２）開口がヘッドホルダに設置されており、空気吐出口
を有するインクジェットヘッドを、前記ヘッドホルダに
取付けることにより、前記開口と前記空気吐出口が対向
設置されることを特徴とする特許請求の範囲第１項記載
のインクジェット記録装置。 ３）開口および空気吐出口より流出する空気流が同一空
気供給源より供給されることを特徴とする特許請求の範
囲第１項記載のインクジェット記録装置。 ４）非使用時に開口を閉塞する手段を有することを特徴
とする特許請求の範囲第１項記載のインクジェット記録
装置。 ５）開口を清浄にするクリーニング手段を有することを
特徴とする特許請求の範囲第１項記載のインクジェット
記録装置。 ６）開口より流出する空気流の流路中に洗浄液を流動さ
せる手段を有することを特徴とする特許請求の範囲第５
項記載のインクジェット記録装置。 ７）開口の設けられた部材に不活性物質をコートしたこ
とを特徴とする特許請求の範囲第１項記載のインクジェ
ット記録装置。[Scope of Claims] 1) An ink discharge port is provided opposite to an air discharge port through which an air flow with a constant flow rate flows out, and a potential difference is created between the ink in the ink discharge port and an electrode provided at the air discharge port. means for discharging ink from the air discharge port by applying a pressure, and means for disposing an opening larger than the air discharge port oppositely on the air outflow side of the air discharge port and causing the air flow to flow out from the opening. An inkjet recording device comprising: 2) Claims characterized in that the opening is installed in a head holder, and by attaching an inkjet head having an air discharge port to the head holder, the opening and the air discharge port are installed facing each other. The inkjet recording device according to item 1. 3) The ink jet recording apparatus according to claim 1, wherein the air flow flowing out from the opening and the air discharge port is supplied from the same air supply source. 4) The inkjet recording apparatus according to claim 1, further comprising means for closing the opening when not in use. 5) The inkjet recording apparatus according to claim 1, further comprising a cleaning means for cleaning the opening. 6) Claim 5 characterized by having means for flowing the cleaning liquid into the flow path of the air flow flowing out from the opening.
The inkjet recording device described in Section 1. 7) The inkjet recording apparatus according to claim 1, wherein the member provided with the opening is coated with an inert substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19962686A JPS6354252A (en) | 1986-08-26 | 1986-08-26 | Ink jet recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19962686A JPS6354252A (en) | 1986-08-26 | 1986-08-26 | Ink jet recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6354252A true JPS6354252A (en) | 1988-03-08 |
Family
ID=16410979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19962686A Pending JPS6354252A (en) | 1986-08-26 | 1986-08-26 | Ink jet recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6354252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8353581B2 (en) * | 2007-02-13 | 2013-01-15 | Brother Kogyo Kabushiki Kaisha | Inkjet recording apparatus |
-
1986
- 1986-08-26 JP JP19962686A patent/JPS6354252A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8353581B2 (en) * | 2007-02-13 | 2013-01-15 | Brother Kogyo Kabushiki Kaisha | Inkjet recording apparatus |
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