JPH0114429Y2 - - Google Patents
Info
- Publication number
- JPH0114429Y2 JPH0114429Y2 JP1982194920U JP19492082U JPH0114429Y2 JP H0114429 Y2 JPH0114429 Y2 JP H0114429Y2 JP 1982194920 U JP1982194920 U JP 1982194920U JP 19492082 U JP19492082 U JP 19492082U JP H0114429 Y2 JPH0114429 Y2 JP H0114429Y2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- solenoid valve
- switching solenoid
- cleaner
- supply
- 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.)
- Expired
Links
- 238000011084 recovery Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 4
- 239000000976 ink Substances 0.000 description 88
- 239000000049 pigment Substances 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 6
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 208000032400 Retinal pigmentation Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000006103 coloring component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Description
〔産業上の利用分野〕
本考案はインクジエツト記録装置に係り、特に
インク成分に顔料成分を含むインクを使用するイ
ンクジエツト記録装置のインク循環系に関する。
〔従来の技術〕
インクジエツト記録装置に使用されるインクの
着色成分は、一般には、染料が使用される。しか
しながら、色によつては、染料では実現できない
ものもある。このような場合には顔料が使用され
る。
このような顔料インクでは、顔料成分は溶媒に
溶解しないので溶媒中に分散浮遊するのみであ
る。従つて、インクを静止状態にすると顔料の沈
殿が発生する。
最近、インクジエツト記録装置の分野におい
て、白インク等のように顔料成分を含むインクが
使用されるようになり、これに伴つて、インク中
の顔料成分の沈殿対策が必要になつてきた。
一方、インク中の成分の凝集や沈殿によつてノ
ズルに目詰りが発生するのを防止するために、記
録ヘツドのインク室内のインクをノズルからの噴
出とは別の経路で循環させてノズルの目詰りを防
止するようにすることが実公昭54−18919号公報
や特公昭55−28868号公報に開示されている。
〔考案が解決しようとする課題〕
しかしながら、前記した従来装置では、前記ノ
ズルをクリーナで洗浄しているときのインクの取
扱いやインク交換時のインク供給手段内のエアー
抜きについては考慮されておらず、従つて、ノズ
ル洗浄中にインク供給手段内に顔料成分の沈殿が
発生したり、インク交換時のインク供給手段内の
エアー抜きが面倒であるという問題があつた。
本発明の目的は、印字中やノズル洗浄中にイン
ク供給手段内に顔料成分の沈殿が発生しないよう
にすると共に、インク交換時のエアー抜きを簡単
にすることにある。
〔問題を解決するための手段〕
本考案は、インクタンクから順次接続されたイ
ンク供給ポンプとインクフイルタとレギユレータ
と圧力計とによつて供給切換え電磁弁の一方の入
力にインクを供給するインク供給手段と、クリー
ナタンクから順次接続されたクリーナ供給ポンプ
とクリーナフイルタによつて前記供給切換え電磁
弁の他方の入力にクリーナを供給するクリーナ供
給手段と、前記供給切換え電磁弁の出力に接続さ
れたノズルと、該ノズルから噴出され印字に使用
されなかつたインク粒子を捕獲するガターと、そ
の入力が前記ガターに接続された回収切換え電磁
弁と、該回収切換え電磁弁の一方の出力を前記イ
ンクタンクに接続するインク回収手段と、該回収
切換え電磁弁の他方の出力を廃液タンクに接続す
る廃液回収手段とを備え、前記供給切換え電磁弁
がインク供給手段をノズルに連結しているときに
前記回収切換え電磁弁はガターを前記インク回収
手段にに連結し、前記供給切換え電磁弁がクリー
ナ供給手段をノズルに連結しているときに前記回
収切換え電磁弁はガターを前記クリーナ回収手段
にに連結するようにしたインクジエツト記録装置
において、前記インク供給手段の前記圧力計と供
給切換え電磁弁の間と前記インクタンクの間に回
収電磁弁を備えたバイパス通路を設けたことを特
徴とする。
〔作用〕
バイパス通路を流れてインクタンクに戻るイン
クは、インク供給手段内のインクの流速を早める
ために該インク供給手段内での顔料成分の沈殿が
発生しにくくなる。しかもこの流れは、ノズル洗
浄のために供給切換え電磁弁をインク供給手段側
からクリーナ供給手段側に切換えても維持される
ので、該ノズル洗浄中にも顔料成分沈殿防止作用
がある。
また、インク循環系内のインクを交換するとき
に該インク循環系（特にインク供給手段内）に混
入したエアーは、比較的に流速の早いバイパス通
路を通して短期間の内に抜けてしまう。
〔実施例〕
以下、本考案になるインクジエツト記録装置の
一実施例を図面を参照して説明する。
第１図は顔料インクを使用するインクジエツト
記録装置のインク及びクリーナの循環系を示して
いる。インクタンク１内の顔料インクは、インク
供給ポンプ２とインクフイルタ３とレギユレータ
４と圧力計５とを順次接続したインク供給系を介
して供給切換え電磁弁６の一方の入力であるイン
ク入力口に供給される。該供給切換え電磁弁６か
ら出力されたインクは記録ヘツドに供給され該記
録ヘツドのノズル７からインク粒子として噴出さ
れ、印字に使用される。印字に使用されなかつた
インク粒子は、ガター８に捕獲される。ガター８
は回収切換え電磁弁９の入力に接続され、ガター
８で捕獲したインク粒子（インク）は該回収切換
え電磁弁９に入力される。該回収切換え電磁弁９
の該インクを出力するインク出力口である一方の
出力は、回収ポンプ１０を介して前記インクタン
ク１に接続されるインク回収系に接続され、該イ
ンク回収系に送りだされたインクはインクタンク
１に回収されて再使用される。
そして、前記インク供給系の前記圧力計５と供
給切換え電磁弁６のインク入力口の間と前記イン
クタンク１の間には、回収電磁弁１１を備えたバ
イパス通路が接続され、該インク供給系内のイン
クを前記供給切換え電磁弁６以降の流路を介在す
ることなくインクタンク１に戻す。
一方、クリーナタンク１２内のクリーナは、ク
リーナ供給ポンプ１３とクリーナフイルタ１４を
順次接続したクリーナ供給系を介して前記供給切
換え電磁弁６の他方の入力であるクリーナ入力口
に供給される。供給切換え電磁弁６が、ノズル洗
浄時に、該クリーナを入力するように切換えられ
ていると、該クリーナは該供給切換え電磁弁６と
ノズル７とガター８を順次流れて回収切換え電磁
弁９に至る。該回収切換え電磁弁９の他方の出力
であるクリーナ出力口は、クリーナ回収ポンプ１
６を介して廃液タンク１５に接続されるクリーナ
回収系に接続され、ノズル洗浄時には該回収切換
え電磁弁９に入力されたクリーナをクリーナ回収
系を介して廃液タンク１５内に回収する。
なお、１７はインクタンク１内のインクを攪拌
する攪拌器、１８はニードル弁である。
ところで、一般のインクジエツト記録装置のイ
ンク供給系での通常の印字中のインクの流速を考
えると、ノズルから噴出するインクの流量とイン
ク供給系のチユーブ内でのインクの流速は次のよ
うにである。
[Industrial Application Field] The present invention relates to an inkjet recording device, and more particularly to an ink circulation system of an inkjet recording device that uses ink containing a pigment component. [Prior Art] Dyes are generally used as the coloring components of inks used in inkjet recording devices. However, some colors cannot be achieved with dyes. In such cases, pigments are used. In such a pigment ink, the pigment component is not dissolved in the solvent and is therefore only dispersed and suspended in the solvent. Therefore, when the ink is brought to a standstill, pigment precipitation occurs. Recently, in the field of inkjet recording devices, inks containing pigment components such as white ink have come into use, and with this, it has become necessary to take measures against precipitation of the pigment components in the ink. On the other hand, in order to prevent clogging of the nozzles due to agglomeration or precipitation of components in the ink, the ink in the ink chamber of the recording head is circulated through a path different from the one ejected from the nozzles. Preventing clogging is disclosed in Japanese Utility Model Publication No. 18919/1982 and Japanese Patent Publication No. 28868/1983. [Problem to be solved by the invention] However, in the conventional apparatus described above, no consideration is given to the handling of ink when the nozzle is being cleaned with a cleaner, or the venting of air within the ink supply means when replacing ink. Therefore, there are problems in that pigment components may precipitate within the ink supply means during nozzle cleaning, and it is troublesome to bleed air from the ink supply means when replacing ink. An object of the present invention is to prevent precipitation of pigment components within an ink supply means during printing or nozzle cleaning, and to simplify air bleeding when replacing ink. [Means for Solving the Problem] The present invention provides an ink supply system that supplies ink to one input of a supply switching solenoid valve by an ink supply pump, an ink filter, a regulator, and a pressure gauge connected sequentially from an ink tank. cleaner supply means for supplying cleaner to the other input of the supply switching solenoid valve by means of a cleaner supply pump and a cleaner filter connected sequentially from the cleaner tank; and a nozzle connected to the output of the supply switching solenoid valve. a gutter that captures ink particles ejected from the nozzle and not used for printing, a recovery switching solenoid valve whose input is connected to the gutter, and an output of one of the recovery switching solenoid valves being connected to the ink tank. and a waste liquid recovery means that connects the other output of the recovery switching solenoid valve to a waste liquid tank, and when the supply switching solenoid valve connects the ink supply means to the nozzle, the recovery switching is performed. A solenoid valve connects the gutter to the ink collection means, and when the supply switching solenoid valve connects the cleaner supply means to the nozzle, the collection switching solenoid valve connects the gutter to the cleaner collection means. The inkjet recording apparatus is characterized in that a bypass passage including a recovery solenoid valve is provided between the pressure gauge of the ink supply means and the supply switching solenoid valve and between the ink tank. [Operation] The ink flowing through the bypass passage and returning to the ink tank increases the flow rate of the ink within the ink supply means, so that precipitation of pigment components within the ink supply means is less likely to occur. Furthermore, this flow is maintained even when the supply switching electromagnetic valve is switched from the ink supply means side to the cleaner supply means side for nozzle cleaning, so that the pigment component precipitation prevention effect is achieved even during the nozzle cleaning. Further, when replacing the ink in the ink circulation system, air mixed into the ink circulation system (particularly within the ink supply means) escapes within a short period of time through the bypass passage, which has a relatively high flow rate. [Embodiment] Hereinafter, an embodiment of the inkjet recording apparatus according to the present invention will be described with reference to the drawings. FIG. 1 shows the ink and cleaner circulation system of an inkjet recording apparatus using pigment ink. The pigment ink in the ink tank 1 is supplied to the ink input port, which is one input of the supply switching solenoid valve 6, through an ink supply system that sequentially connects an ink supply pump 2, an ink filter 3, a regulator 4, and a pressure gauge 5. Supplied. The ink output from the supply switching electromagnetic valve 6 is supplied to the recording head, and is ejected as ink droplets from the nozzles 7 of the recording head to be used for printing. Ink particles not used for printing are captured in the gutter 8. Gutter 8
is connected to the input of the collection switching solenoid valve 9, and the ink particles (ink) captured by the gutter 8 are input to the collection switching solenoid valve 9. The recovery switching solenoid valve 9
One output, which is an ink output port that outputs the ink, is connected to an ink recovery system connected to the ink tank 1 via a recovery pump 10, and the ink sent to the ink recovery system is sent to the ink tank 1. 1 will be collected and reused. A bypass passage provided with a recovery solenoid valve 11 is connected between the pressure gauge 5 of the ink supply system, the ink input port of the supply switching solenoid valve 6, and the ink tank 1. The ink inside is returned to the ink tank 1 without intervening the flow path after the supply switching solenoid valve 6. On the other hand, the cleaner in the cleaner tank 12 is supplied to the cleaner input port, which is the other input of the supply switching solenoid valve 6, through a cleaner supply system in which a cleaner supply pump 13 and a cleaner filter 14 are connected in sequence. When the supply switching solenoid valve 6 is switched to input the cleaner during nozzle cleaning, the cleaner flows sequentially through the supply switching solenoid valve 6, the nozzle 7, and the gutter 8 and reaches the recovery switching solenoid valve 9. . The cleaner output port, which is the other output of the recovery switching solenoid valve 9, is connected to the cleaner recovery pump 1.
6 to a cleaner recovery system connected to a waste liquid tank 15, and during nozzle cleaning, the cleaner input to the recovery switching solenoid valve 9 is recovered into the waste liquid tank 15 via the cleaner recovery system. Note that 17 is a stirrer for stirring the ink in the ink tank 1, and 18 is a needle valve. By the way, considering the flow rate of ink during normal printing in the ink supply system of a general inkjet recording device, the flow rate of ink ejected from the nozzle and the flow rate of ink in the tube of the ink supply system are as follows. be.
以上のように、本考案は、インク供給手段の圧
力計と供給切換え電磁弁の間とインクタンクの間
に回収電磁弁を備えたバイパス通路を設け、イン
ク供給手段内のインク流速を印字中は勿論のこと
ノズル洗浄中も早めるようにしたので、印字中や
ノズル洗浄中にインク供給手段内でのインクの顔
料成分の沈殿を防止することができ、更に、該イ
ンク供給手段内でのインク流速が大きくなること
によりインク交換時に混入する気泡を短期間内に
排出することができエアー抜きが簡単になる効果
が得られる。
As described above, the present invention provides a bypass passage equipped with a recovery solenoid valve between the pressure gauge of the ink supply means and the supply switching solenoid valve, and between the ink tank, so that the ink flow rate in the ink supply means can be measured during printing. Of course, since the nozzle cleaning is also accelerated, precipitation of pigment components of the ink within the ink supply means can be prevented during printing or nozzle cleaning, and furthermore, the ink flow rate within the ink supply means can be reduced. By increasing the size of the ink, air bubbles that are mixed in during ink replacement can be discharged within a short period of time, and air bleeding becomes easier.
図面は本考案の一実施例を示すもので、第１図
はインクジエツト記録装置のインク及びクリーナ
の循環系統図、第２図は運転モードとインク及び
クリーナの循環流対応テーブルである。
１……インクタンク、２……インク供給ポン
プ、３……インクフイルタ、４……レギユレー
タ、５……圧力計、６……供給切換え電磁弁、７
……ノズル、８……ガター、９……回収切換え電
磁弁、１０……インク回収ポンプ、１１……回収
電磁弁、１２……クリーナタンク、１３……クリ
ーナ供給ポンプ、１４……クリーナフイルタ、１
５……廃液タンク。
The drawings show an embodiment of the present invention, and FIG. 1 is a diagram of the ink and cleaner circulation system of an inkjet recording apparatus, and FIG. 2 is a table showing the correspondence between operation modes and ink and cleaner circulation flows. 1... Ink tank, 2... Ink supply pump, 3... Ink filter, 4... Regulator, 5... Pressure gauge, 6... Supply switching solenoid valve, 7
... Nozzle, 8 ... Gutter, 9 ... Recovery switching solenoid valve, 10 ... Ink recovery pump, 11 ... Recovery solenoid valve, 12 ... Cleaner tank, 13 ... Cleaner supply pump, 14 ... Cleaner filter, 1
5... Waste liquid tank.
Claims (1)
ンプとインクフイルタとレギユレータと圧力計と
によつて供給切換え電磁弁の一方の入力にインク
を供給するインク供給手段と、クリーナタンクか
ら順次接続されたクリーナ供給ポンプとクリーナ
フイルタによつて前記供給切換え電磁弁の他方の
入力にクリーナを供給するクリーナ供給手段と、
前記供給切換え電磁弁の出力に接続されたノズル
と、該ノズルから噴出され印字に使用されなかつ
たインク粒子を捕獲するガターと、その入力が前
記ガターに接続された回収切換え電磁弁と、該回
収切換え電磁弁の一方の出力を前記インクタンク
に接続するインク回収手段と、該回収切換え電磁
弁の他方の出力を廃液タンクに接続する廃液回収
手段とを備え、前記供給切換え電磁弁がインク供
給手段をノズルに連結しているときに前記回収切
換え電磁弁はガターを前記インク回収手段にに連
結し、前記供給切換え電磁弁がクリーナ供給手段
をノズルに連結しているときに前記回収切換え電
磁弁はガターを前記クリーナ回収手段にに連結す
るようにしたインクジエツト記録装置において、
前記インク供給手段の前記圧力計と供給切換え電
磁弁の間と前記インクタンクの間に回収電磁弁を
備えたバイパス通路を設けたことを特徴とするイ
ンクジエツト記録装置。 An ink supply means for supplying ink to one input of a supply switching solenoid valve by an ink supply pump, an ink filter, a regulator, and a pressure gauge connected sequentially from the ink tank, and a cleaner supply pump sequentially connected from the cleaner tank. and cleaner supply means for supplying cleaner to the other input of the supply switching solenoid valve by a cleaner filter;
a nozzle connected to the output of the supply switching solenoid valve, a gutter that captures ink particles ejected from the nozzle and not used for printing, a recovery switching solenoid valve whose input is connected to the gutter, and the collection an ink recovery means for connecting one output of a switching solenoid valve to the ink tank; and a waste liquid recovery means for connecting the other output of the recovery switching solenoid valve to a waste liquid tank, and the supply switching solenoid valve is an ink supplying means. The collection switching solenoid valve connects the gutter to the ink collection means when the cleaner supply means is connected to the nozzle, and the collection switching solenoid valve connects the ink collection means to the nozzle when the supply switching solenoid valve connects the cleaner supply means to the nozzle. An inkjet recording device in which a gutter is connected to the cleaner recovery means,
An inkjet recording apparatus characterized in that a bypass passage provided with a recovery solenoid valve is provided between the pressure gauge of the ink supply means and the supply switching solenoid valve and between the ink tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19492082U JPS5999737U (en) | 1982-12-24 | 1982-12-24 | Inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19492082U JPS5999737U (en) | 1982-12-24 | 1982-12-24 | Inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5999737U JPS5999737U (en) | 1984-07-05 |
| JPH0114429Y2 true JPH0114429Y2 (en) | 1989-04-27 |
Family
ID=30418811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19492082U Granted JPS5999737U (en) | 1982-12-24 | 1982-12-24 | Inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5999737U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083053A1 (en) * | 1999-09-09 | 2001-03-14 | De La Rue Giori S.A. | Inkjet printing device for inks containing a high loading of pigment and inkjet printing process utilizing said device |
| JP4631393B2 (en) * | 2003-11-06 | 2011-02-16 | コニカミノルタエムジー株式会社 | Inkjet printer |
| JP4971819B2 (en) * | 2007-02-08 | 2012-07-11 | ローランドディー．ジー．株式会社 | Ink supply system for inkjet printer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418919U (en) * | 1977-07-09 | 1979-02-07 | ||
| JPS5528868A (en) * | 1978-08-24 | 1980-02-29 | Fujikura Ltd | Method of extruding plastic |
-
1982
- 1982-12-24 JP JP19492082U patent/JPS5999737U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418919U (en) * | 1977-07-09 | 1979-02-07 | ||
| JPS5528868A (en) * | 1978-08-24 | 1980-02-29 | Fujikura Ltd | Method of extruding plastic |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5999737U (en) | 1984-07-05 |
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