JPH0577439A - Valve unit of ink jet recording apparatus - Google Patents
Valve unit of ink jet recording apparatusInfo
- Publication number
- JPH0577439A JPH0577439A JP23781991A JP23781991A JPH0577439A JP H0577439 A JPH0577439 A JP H0577439A JP 23781991 A JP23781991 A JP 23781991A JP 23781991 A JP23781991 A JP 23781991A JP H0577439 A JPH0577439 A JP H0577439A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- valve
- solvent
- nozzle
- recording apparatus
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インクジェット記録装
置に係り、特にノズルの洗浄に好適な弁ユニットの構造
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus, and more particularly to a structure of a valve unit suitable for cleaning nozzles.
【０００２】[0002]
【従来の技術】一般に、荷電変調形のインクジェット記
録装置の構成は図２のようになっている。まずインクボ
トル１０からインクを吸引し、供給ポンプ１１によって
後路に圧送する。圧送されたインクは圧力を一定に調圧
する調圧弁１２、さらにインクの流動，停止を行う電磁
弁１３を介して、インクを噴出、粒子化するノズル３に
達する。従来この種の装置は、稼動立ち上げ、立ち下げ
時に、ノズルの先端に付着する汚れを取り除く必要があ
り、メンテナンス性が悪いという問題があった。そこで
稼動停止時に洗浄溶剤を流し、ノズル内を洗浄するとい
う方式が、特開昭53−61232 号にある。従来特許では、
インクと溶剤の切り換えは電磁弁を用いていた。2. Description of the Related Art Generally, the structure of a charge modulation type ink jet recording apparatus is as shown in FIG. First, ink is sucked from the ink bottle 10 and pressure-fed to the rear path by the supply pump 11. The pressure-fed ink reaches a nozzle 3 that ejects and atomizes the ink through a pressure regulating valve 12 that regulates the pressure to a constant level and a solenoid valve 13 that causes the ink to flow and stop. Conventionally, this type of device has a problem that it is necessary to remove the dirt attached to the tip of the nozzle at the time of starting up and shutting down the operation, resulting in poor maintainability. Therefore, Japanese Patent Laid-Open No. 53-61232 discloses a method in which a cleaning solvent is flowed when the operation is stopped to clean the inside of the nozzle. In the conventional patent,
A solenoid valve was used to switch between ink and solvent.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来装
置のようにインクと溶剤を切り換えるために電磁弁を用
いることは、ノズル，帯電電極などからなるノズルヘッ
ド部が大型化し、また電磁弁の駆動回路およびその配線
のための線材などが付加されることにより、コストアッ
プとなり、市場の要求と相反してしまう。However, the use of the solenoid valve for switching the ink and the solvent as in the conventional apparatus increases the size of the nozzle head portion including the nozzle and the charging electrode, and the drive circuit of the solenoid valve. And the addition of a wire material for the wiring increases the cost and conflicts with the market demand.
【０００４】本発明の目的は、ノズルの洗浄機能を付加
したインクジェット記録装置において簡単な機構で溶剤
とインクの切り換え弁を構成し提供することにある。It is an object of the present invention to provide a solvent / ink switching valve with a simple mechanism in an ink jet recording apparatus having a nozzle cleaning function.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、インク供給流路とノズル洗浄用の溶剤供給流路とを
備え、かつノズルに直接取り付けが可能な弁ユニットを
構成した。また弁ユニット内のデットスペースを小さく
してインクと溶剤の切り換えを速やかに行うために、イ
ンク供給流路の中に弁室を設けて溶剤供給流路を溶剤供
給時のみ開く弁を介して接続した。In order to achieve the above object, a valve unit having an ink supply passage and a solvent supply passage for cleaning a nozzle and which can be directly attached to a nozzle is constructed. Also, in order to reduce the dead space in the valve unit and quickly switch between ink and solvent, a valve chamber is provided in the ink supply channel and the solvent supply channel is connected via a valve that opens only when solvent is supplied. did.
【０００６】[0006]
【作用】インク噴出時、弁ユニット内の弁は閉じており
溶剤が混じることなくインク噴出のみを行う。インク供
給電磁弁を閉じ、溶剤供給電磁弁を開けると、弁ユニッ
ト内の溶剤供給側の弁は開き、ノズルからは溶剤が噴出
される。このとき、弁ユニット内にはインクの噴出方向
に対して弁がないため、噴出される溶剤にはインク成分
が混入する。しかし、インク供給流路の中に弁室を設け
インクを溶剤により押し出すような構成にすることで洗
浄効果を高めることができる。When the ink is ejected, the valve in the valve unit is closed and only the ink is ejected without mixing the solvent. When the ink supply solenoid valve is closed and the solvent supply solenoid valve is opened, the solvent supply side valve in the valve unit is opened and the solvent is ejected from the nozzle. At this time, since the valve unit has no valve in the ink ejection direction, the ink component is mixed in the ejected solvent. However, the cleaning effect can be enhanced by providing a valve chamber in the ink supply flow path and by pushing out the ink with the solvent.
【０００７】[0007]
【実施例】以下、図面を参照して本発明の実施例を説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図３は本発明になる弁ユニットの内部構造
の一例を示したもので、弁本体２はインク供給流路２
ａ，溶剤供給流路２ｂ、およびインク，溶剤が混じりあ
う弁室２ｄ，共通流路２ｆと、切り換えを行うための弁
機構４により構成されている。ここで弁機構４は、例え
ば、弾性体としてコイルばね４ａ，シール部材として鋼
球４ｂとＯリング４ｃを使用する。コイルばね４ａの線
径や、長さを変えることで通常状態でのシール力を調整
することができる。また、弁機構４は、弁押さえ５によ
って固定される。なお、継ぎ手７は流路と弁本体２をつ
なぐ役目を果たしている。弁本体２は、インクと溶剤が
混じりあう弁室２ｄ，共通流路２ｆの容積が小さくなる
ような構造とし、ノズル３を直接、弁本体２に取り付け
られるようにした。これにより、インクから溶剤，溶剤
からインクへと置換する時間を短くすることができる。
また、インク供給流路の中に弁機構４を備える弁室２ｄ
を設けることで、置換時のデッドスペースを小さくでき
る。FIG. 3 shows an example of the internal structure of the valve unit according to the present invention.
a, a solvent supply flow path 2b, a valve chamber 2d in which ink and solvent are mixed, a common flow path 2f, and a valve mechanism 4 for switching. Here, the valve mechanism 4 uses, for example, a coil spring 4a as an elastic body, a steel ball 4b and an O-ring 4c as a seal member. By changing the wire diameter and the length of the coil spring 4a, the sealing force in the normal state can be adjusted. The valve mechanism 4 is fixed by the valve retainer 5. The joint 7 serves to connect the flow passage and the valve body 2. The valve body 2 has a structure in which the volume of the valve chamber 2d and the common flow path 2f in which the ink and the solvent are mixed is small, and the nozzle 3 is directly attached to the valve body 2. As a result, the time required to replace the ink with the solvent and the solvent with the ink can be shortened.
Further, the valve chamber 2d having the valve mechanism 4 in the ink supply flow path
By providing, the dead space at the time of replacement can be reduced.
【０００９】次に動作について図４を参照して説明す
る。Next, the operation will be described with reference to FIG.
【００１０】インク供給時、インクはインクボトル１０
から吸引され、供給ポンプ１１によって後路に圧送され
る。圧送されたインクは圧力を一定に調圧する調圧弁１
２、さらにインクの流動、停止を行う電磁弁１３を介し
て弁本体２のインク供給流路２ａに流れ込む。さらにイ
ンクは弁室２ｄ，共通流路２ｆ内を通ってノズル３から
噴出される。この時、弁機構４は閉じたままの状態とな
る。ノズル洗浄時は、電磁弁１３を閉じインク供給を停
止して、今度は溶剤を溶剤容器１７から供給ポンプ１６
によって電磁弁１５を介して弁本体２内に圧送する。今
度は弁機構４が開かれ、溶剤が共通流路２ｆ内に流れ込
む。弁室２ｄ、共通流路２ｆ内には前に流したインクが
残っているので溶剤によってこれを押し流し、弁室２
ｄ，共通流路２ｆ内および、ノズル３内部を洗浄するこ
とができる。When the ink is supplied, the ink is in the ink bottle 10
And is pumped to the rear path by the supply pump 11. Pressure-regulated valve 1 that regulates the pressure of the ink sent under pressure
2. Further, the ink flows into the ink supply flow path 2a of the valve body 2 via the electromagnetic valve 13 for flowing and stopping the ink. Further, the ink is ejected from the nozzle 3 through the valve chamber 2d and the common channel 2f. At this time, the valve mechanism 4 remains closed. When cleaning the nozzles, the solenoid valve 13 is closed to stop the ink supply, and this time the solvent is supplied from the solvent container 17 to the pump 16
Is pressure fed into the valve body 2 via the solenoid valve 15. This time, the valve mechanism 4 is opened and the solvent flows into the common channel 2f. Since the ink that has flowed before remains in the valve chamber 2d and the common flow channel 2f, it is washed away by the solvent and the valve chamber 2
d, the inside of the common channel 2f and the inside of the nozzle 3 can be cleaned.
【００１１】本実施例によれば、溶剤によるノズル内の
洗浄をインクと溶剤が混じりあう弁室２ｄ，共通流路２
ｆの容積を小さくすることで、インクから溶剤，溶剤か
らインクへの切り換えを効率良くすることができる。ま
た、インク供給流路２ａの中に弁室２ｄを設けたことで
切り換え時のデッドスペースを小さくすることもでき
る。According to this embodiment, for cleaning the inside of the nozzle with a solvent, the valve chamber 2d and the common flow path 2 in which the ink and the solvent are mixed.
By reducing the volume of f, it is possible to efficiently switch from ink to solvent and from solvent to ink. Further, by providing the valve chamber 2d in the ink supply flow path 2a, the dead space at the time of switching can be reduced.
【００１２】もう一つの発明の実施例を図１に示す。弁
本体１はインク供給流路１ａ，溶剤供給流路１ｂ，イン
クの循環，圧抜き、およびエア抜き流路１ｃ（以下、単
に循環流路１ｃと呼ぶ）および溶剤供給側の弁機構４、
該弁機構４を設置する弁室１ｄと循環側の弁機構４、該
弁機構４を設置する弁室１ｅと共通流路１ｆにより構成
されている。弁機構４の構成は前記実施例と同様であ
る。また溶剤供給側の弁機構４は弁押さえ５によって、
循環側の弁機構４は弁押さえ８によって固定される。該
弁本体１も前記弁本体２と同様にインクと溶剤の混じり
あう部分の容積を小さくし、かつ置換時のデッドスペー
スも小さくなるような構成とした。Another embodiment of the invention is shown in FIG. The valve body 1 includes an ink supply flow path 1a, a solvent supply flow path 1b, ink circulation, pressure release, and an air release flow path 1c (hereinafter simply referred to as a circulation flow path 1c) and a solvent supply side valve mechanism 4.
It is composed of a valve chamber 1d in which the valve mechanism 4 is installed, a valve mechanism 4 on the circulation side, a valve chamber 1e in which the valve mechanism 4 is installed, and a common channel 1f. The structure of the valve mechanism 4 is the same as that of the above embodiment. Further, the valve mechanism 4 on the solvent supply side is
The valve mechanism 4 on the circulation side is fixed by a valve retainer 8. Like the valve body 2, the valve body 1 has a structure in which the volume of the portion where the ink and the solvent are mixed together is small and the dead space at the time of replacement is also small.
【００１３】次に動作について図５を参照して説明す
る。ノズル洗浄までは、前記実施例と同様に動作する。
洗浄動作終了後、本実施例では循環流路１ｃに接続され
る流路の電磁弁１８を開けることで、インクチューブ内
の残圧を取り除く、その後弁本体１のインク供給流路１
ａと電磁弁１３の間から回収流路１９に電磁弁２０を介
してつないだバイパス流路２１によって弁本体１内およ
びノズル３内部の溶液が吸引される。吸引は回収ポンプ
１４によって行われ、バイパス流路２１にある電磁弁２
０を開けることで可能となる。図６は上記動作のシーケ
ンス図の一例を示す。このシーケンスは制御装置２２に
よりコントロールされる。図６において電磁弁１５ＯＮ
と電磁弁１３ＯＦＦの間にタイムラグｔ1 があるが、こ
れはノズル３からのインク噴出→溶剤噴出（洗浄）の間
で流れが途切れないようにするためのものである。ま
た、ｔ1〜ｔ5の時間は自由に設定できる。Next, the operation will be described with reference to FIG. Up to nozzle cleaning, the operation is similar to that of the above embodiment.
After the cleaning operation is completed, in this embodiment, the electromagnetic valve 18 of the flow path connected to the circulation flow path 1c is opened to remove the residual pressure in the ink tube, and then the ink supply flow path 1 of the valve body 1 is removed.
The solution in the valve body 1 and in the nozzle 3 is sucked by the bypass flow passage 21 connected from the a to the solenoid valve 13 to the recovery flow passage 19 via the solenoid valve 20. The suction is performed by the recovery pump 14, and the solenoid valve 2 in the bypass passage 21 is used.
It becomes possible by opening 0. FIG. 6 shows an example of a sequence diagram of the above operation. This sequence is controlled by the controller 22. In Figure 6, solenoid valve 15ON
There is a time lag t 1 between the electromagnetic valve 13 and the solenoid valve 13 OFF. This is to prevent the flow from being interrupted between the ink ejection from the nozzle 3 and the solvent ejection (cleaning). In addition, the time of t 1 ~t 5 can be set freely.
【００１４】本実施例によれば、稼働停止後、吸引を行
うことで弁本体１内およびノズル３内に空気の層がで
き、稼働停止後のインクのたれ、および流路内のインク
の膨張によるもれ出しを防止することができる。また吸
引流路となるインク供給流路１ａとノズル３の噴出口を
同一線上に置いたことで吸引がスムーズに行える。さら
に電磁弁１８を開けてインクを循環してやることで弁本
体１、およびインク循環系内のエア抜きをすることもで
きる。According to the present embodiment, after the operation is stopped, suction is performed to form a layer of air in the valve body 1 and the nozzle 3, and the ink drips after the operation is stopped and the ink in the flow path is expanded. It is possible to prevent leakage due to. Further, by arranging the ink supply channel 1a, which serves as a suction channel, and the ejection port of the nozzle 3 on the same line, suction can be smoothly performed. Further, by opening the solenoid valve 18 to circulate the ink, the air can be released from the valve body 1 and the ink circulation system.
【００１５】[0015]
【発明の効果】本発明によれば、インク供給流路の中に
弁室を設けそれに溶剤供給流路を接続してデッドスペー
スが小さくなるようにしたので、溶剤噴出時、インクを
押し流し弁本体、およびノズル内部をきれいにしやすい
という効果がある。またインクに置換しやすいという特
徴もある。さらに稼働停止後、吸引を行うことでインク
のたれ、および流路内のインクの膨張によるもれ出しを
防止することができる。According to the present invention, since the valve chamber is provided in the ink supply flow passage and the solvent supply flow passage is connected to the valve chamber to reduce the dead space, the ink is washed away when the solvent is ejected. , And the inside of the nozzle can be easily cleaned. Another feature is that ink can be easily replaced. Further, after the operation is stopped, suction is performed to prevent ink from dripping and leaking due to expansion of ink in the flow path.
【図１】本発明になる弁ユニットの縦断側面図である。FIG. 1 is a vertical sectional side view of a valve unit according to the present invention.
【図２】従来のインクジェット記録装置の概略構成図で
ある。FIG. 2 is a schematic configuration diagram of a conventional inkjet recording apparatus.
【図３】本発明の一実施例になる弁ユニットの縦断側面
図である。FIG. 3 is a vertical sectional side view of a valve unit according to an embodiment of the present invention.
【図４】本発明の一実施例になる弁ユニットを利用した
インク循環図である。FIG. 4 is an ink circulation diagram using a valve unit according to an embodiment of the present invention.
【図５】本発明になる弁ユニットを利用したインク循環
図である。FIG. 5 is an ink circulation diagram using the valve unit according to the present invention.
【図６】本発明になる弁ユニットを利用したインクジェ
ット記録装置のシーケンス図である。FIG. 6 is a sequence diagram of an inkjet recording apparatus using the valve unit according to the present invention.
１…弁本体、１ａ…インク供給流路、１ｂ…溶剤供給流
路、１ｃ…循環流路、１ｄ…弁室（溶剤供給側）、１ｅ
…弁室（循環側）、１ｆ…共通流路、３…ノズル、４…
弁機構（溶剤供給側，循環側）、４ａ…コイルばね、４
ｂ…ＳＵＳボール、４ｃ…Ｏリング、５…弁押さえ（溶
剤供給側）、６…弁押さえ（循環側）。DESCRIPTION OF SYMBOLS 1 ... Valve main body, 1a ... Ink supply channel, 1b ... Solvent supply channel, 1c ... Circulation channel, 1d ... Valve chamber (solvent supply side), 1e
... Valve chamber (circulation side), 1f ... Common flow path, 3 ... Nozzle, 4 ...
Valve mechanism (solvent supply side, circulation side), 4a ... Coil spring, 4
b ... SUS ball, 4c ... O ring, 5 ... valve retainer (solvent supply side), 6 ... valve retainer (circulation side).
Claims (3)
て、インク粒子を発生させ、このインク粒子により、印
字を行うとともに、印字に使用しないインク粒子はガタ
ーにより捕らえ、回収流路を通り、再び印字に用いるた
めにインクボトルへもどされるインクジェット記録装置
において、前記ノズルを洗浄するための溶剤をためてお
く容器と、該容器内溶剤を供給する溶剤供給流路を設
け、該溶剤供給流路を前記ノズルの１次側で溶剤供給時
のみ開く弁を介して接続し、かつ該弁の弁構成部材を設
置する弁室の一部を前記インクボトルから前記ノズルに
至るインク供給流路の一部として構成したことを特徴と
するインクジェット記録装置の弁ユニット。1. An ink is supplied from an ink bottle to a nozzle to generate ink particles, and the ink particles are used for printing, and ink particles not used for printing are caught by a gutter, pass through a recovery passageway, and are returned. In an inkjet recording apparatus that is returned to an ink bottle for use in printing, a container for storing a solvent for cleaning the nozzle and a solvent supply channel for supplying the solvent in the container are provided, and the solvent supply channel is A part of an ink supply flow path from the ink bottle to the nozzle, which is connected to a primary side of the nozzle via a valve that is opened only when a solvent is supplied and in which a valve chamber for installing a valve constituent member of the valve is installed. A valve unit for an inkjet recording apparatus, which is configured as follows.
接取り付けが可能となる構造とし、その内部にインク供
給流路と溶剤供給流路が備えられていることを特徴とす
るインクジェット記録装置の弁ユニット。2. The ink jet recording apparatus according to claim 1, wherein the valve unit has a structure that can be directly attached to the nozzle, and an ink supply passage and a solvent supply passage are provided inside thereof. Valve unit.
よび圧抜きを行うための流路が接続可能となる構造と
し、循環および圧抜き時のみ開く弁の弁構成部材を設置
する弁室を備えていることを特徴とするインクジェット
記録装置の弁ユニット。3. The valve unit according to claim 2 has a structure in which a flow path for circulating and depressurizing ink can be connected, and a valve chamber for installing a valve component member of a valve that opens only when circulating and depressurizing. A valve unit for an ink jet recording apparatus, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23781991A JP3111531B2 (en) | 1991-09-18 | 1991-09-18 | Valve unit of inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23781991A JP3111531B2 (en) | 1991-09-18 | 1991-09-18 | Valve unit of inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0577439A true JPH0577439A (en) | 1993-03-30 |
| JP3111531B2 JP3111531B2 (en) | 2000-11-27 |
Family
ID=17020872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23781991A Expired - Lifetime JP3111531B2 (en) | 1991-09-18 | 1991-09-18 | Valve unit of inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3111531B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268844A (en) * | 2006-03-31 | 2007-10-18 | Brother Ind Ltd | Inkjet head and valve |
| JP2008155615A (en) * | 2006-11-29 | 2008-07-10 | Seiko Epson Corp | Liquid ejecting apparatus |
| GB2575986A (en) * | 2018-07-30 | 2020-02-05 | Domino Uk Ltd | Solvent supply tube arrangement |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5048996B2 (en) | 2006-11-10 | 2012-10-17 | 昭和電工株式会社 | Wear-resistant aluminum alloy material excellent in workability and method for producing the same |
-
1991
- 1991-09-18 JP JP23781991A patent/JP3111531B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268844A (en) * | 2006-03-31 | 2007-10-18 | Brother Ind Ltd | Inkjet head and valve |
| JP4631779B2 (en) * | 2006-03-31 | 2011-02-16 | ブラザー工業株式会社 | Ink supply method to inkjet head |
| US7926922B2 (en) | 2006-03-31 | 2011-04-19 | Brother Kogyo Kabushiki Kaisha | Ink-jet head and valve |
| JP2008155615A (en) * | 2006-11-29 | 2008-07-10 | Seiko Epson Corp | Liquid ejecting apparatus |
| GB2575986A (en) * | 2018-07-30 | 2020-02-05 | Domino Uk Ltd | Solvent supply tube arrangement |
| WO2020025914A1 (en) | 2018-07-30 | 2020-02-06 | Domino Uk Limited | Solvent supply tube arrangement |
| US11479044B2 (en) | 2018-07-30 | 2022-10-25 | Domino Uk Limited | Solvent supply tube arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3111531B2 (en) | 2000-11-27 |
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