JP3284297B2 - Transfer type inkjet recording device - Google Patents
Transfer type inkjet recording deviceInfo
- Publication number
- JP3284297B2 JP3284297B2 JP28629495A JP28629495A JP3284297B2 JP 3284297 B2 JP3284297 B2 JP 3284297B2 JP 28629495 A JP28629495 A JP 28629495A JP 28629495 A JP28629495 A JP 28629495A JP 3284297 B2 JP3284297 B2 JP 3284297B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- air
- ink jet
- ink
- jet recording
- 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 - Lifetime
Links
Landscapes
- Ink Jet (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、回転するドラム
の表面にインクジェット記録ヘッドからインク滴を吐出
させてインク像を形成し、前記インク像の乾燥後に記録
用紙に転写するインインクジェット記録装置に関する。[0001] 1. Field of the Invention [0002] The present invention relates to an in-ink jet recording apparatus that forms an ink image by discharging ink droplets from an ink jet recording head on the surface of a rotating drum, and transfers the ink image to recording paper after drying.
【０００２】[0002]
【従来の技術】 回転するドラムの表面にインクジェッ
ト記録ヘッドからインク滴を吐出させてインク像を形成
し、前記インク像の乾燥後に記録用紙に転写するインイ
ンクジェット記録装置は、例えば国際公開番号ＷＯ９４
／０１２８３号に見られるように、熱可塑性樹脂を含ん
でなるインクを、記録ヘッドより吐出し、ドラム上に設
けられた転写媒体である記録領域に一旦インク像を形成
し、そのインク像を熱可塑性樹脂の軟化または溶融温度
以上で加熱し、膜化した後に、、記録媒体である記録紙
に転写するものである。2. Description of the Related Art An in-ink jet recording apparatus that forms an ink image by discharging ink droplets from an ink jet recording head on the surface of a rotating drum and transfers the ink image to a recording sheet after drying the ink image is disclosed, for example, in International Publication No. WO94.
No./01283, an ink containing a thermoplastic resin is ejected from a recording head to form an ink image once in a recording area which is a transfer medium provided on a drum, and the ink image is heated. Heating is performed at a temperature higher than the softening or melting temperature of the plastic resin to form a film, which is then transferred to recording paper as a recording medium.
【０００３】しかしながらドラム上の記録領域を加熱す
るために、記録ヘッドが加熱されやすく、また蒸発した
水蒸気がドラム近傍に滞留するため、装置の高速化が困
難であるといった課題がある。このため、特開平6−122
192号公報に見られるように送風手段を設け、空気流の
一部をドラムの回転方向と逆方向に導く導風路を設け、
滞留した水蒸気が速やかにドラムの表面から排除される
とともに、記録ヘッドの加熱を防止することが提案され
ている。However, the recording area on the drum is heated, so that the recording head is likely to be heated, and the vaporized water stays near the drum, making it difficult to increase the speed of the apparatus. For this reason, JP-A-6-122
No. 192, as provided in the blower means, provided a wind guide path to guide a part of the air flow in the direction opposite to the rotation direction of the drum,
It has been proposed that the retained steam is quickly removed from the surface of the drum and that the recording head is prevented from being heated.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、印刷の
高速化を図るためには、高出力の送風手段が必要となる
が、風によるインク滴の偏向による印字品質の低下や、
送風手段の騒音による静音性の低下等などが生じるとい
う問題がある。本発明は、このような問題に鑑みてなさ
れたものであって、その目的とするところは、よりドラ
ム近傍のインク溶媒を効率的に排除して高速印刷が可能
な転写式インクジェット記録装置を提供することにあ
る。However, in order to achieve high-speed printing, a high-output air blowing means is required.
There is a problem in that the noise of the blowing means may cause a reduction in quietness and the like. The present invention has been made in view of such a problem, and an object of the present invention is to provide a transfer type ink jet recording apparatus capable of performing high-speed printing by more efficiently removing an ink solvent near a drum. Is to do.
【０００５】[0005]
【課題を解決するための手段】このような課題を達成す
るために本発明においては、回転するドラムの表面にイ
ンクジェット記録ヘッドからインク滴を吐出させてイン
ク像を形成し、前記インク像の乾燥後に記録用紙に転写
するインクジェット記録装置において、前記ドラムに対
向し、かつ前記ドラムから一定間隔を隔てて、前記ドラ
ムの表面の空気流を剥離する空気整流板を配置するよう
にした。 According to the present invention , in order to achieve the above object, an ink image is formed by ejecting ink droplets from an ink jet recording head on the surface of a rotating drum, and drying of the ink image is performed. in the ink jet recording apparatus onto a recording paper after, versus the drum
As the direction to and at a predetermined distance from said drum, disposing the air guide plate for separating the air flow on the surface of the drum
I made it.
【０００６】[0006]
【作用】ドラムの表面に停滞する空気を空気整流板によ
り積極的に剥離させてドラム表面からインク溶媒を揮散
させる。The air stagnant on the surface of the drum is positively peeled off by the air straightening plate to volatilize the ink solvent from the drum surface.
【０００７】[0007]
【発明の実施の形態】そこで以下に本発明の詳細を図示
した実施例に基づいて説明する。図１は本発明によるイ
ンクジェット記録装置の一実施例を示すものであって、
ドラム１は、本実施例においてはアルミ材からなる円筒
の表面に、ゴム材質を均一にコーティングして構成され
ており、図示しない回転角検出手段により、電気的に記
録領域が設定される。ドラム１の内部には加熱手段であ
るヒータ７が配設されており、ドラム１は図示しない駆
動手段により、矢印Ａの方向に回転駆動される。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a first embodiment of the present invention. FIG. 1 shows an embodiment of an ink jet recording apparatus according to the present invention,
In this embodiment, the drum 1 is formed by uniformly coating a rubber material on the surface of a cylinder made of an aluminum material, and a recording area is electrically set by a rotation angle detecting means (not shown). A heater 7 serving as a heating unit is disposed inside the drum 1, and the drum 1 is driven to rotate in a direction of an arrow A by a driving unit (not shown).
【０００８】記録ヘッド２は、ドラム１に対峙し、ドラ
ム１の回転軸方向に移動可能に支持され、ドラム１の回
転に同期して移動して記録領域全体を走査する。転写手
段を構成する圧力ローラ３は、ドラム１に対して押圧ま
たは解除の制御が可能に構成され、押圧時は記録紙８を
ドラム１に押圧しながら回転し、記録紙８にインク像を
転写する。The recording head 2 faces the drum 1 and is movably supported in the rotation axis direction of the drum 1. The recording head 2 moves in synchronization with the rotation of the drum 1 and scans the entire recording area. The pressure roller 3 constituting the transfer means is configured to be able to control pressing or releasing of the drum 1, and when pressed, rotates while pressing the recording paper 8 against the drum 1 to transfer the ink image to the recording paper 8. I do.
【０００９】ところで、ドラム１の周囲には、空気整流
板Ａ〜Ｃ１０１，１０２，１０３が配設されており、こ
れらの外側には排気ファン４と空気流案内板５とが配設
されている。By the way, air rectifying plates A to C 101, 102 and 103 are arranged around the drum 1, and an exhaust fan 4 and an air flow guide plate 5 are arranged outside these. .
【００１０】なお、本実施例に用いるインクは、着色剤
と、熱可塑性樹脂と、その他の添加剤とを水に溶解させ
て調製されている。The ink used in the present embodiment is prepared by dissolving a colorant, a thermoplastic resin, and other additives in water.
【００１１】この実施例において、まずヒータ７により
ドラム１の表面を加温して、ドラム１を矢印Ａの方向に
一定速度で回転せしめ、記録ヘッド２より選択的にイン
ク滴を吐出させてインク像を形成する。このように記録
ヘッド２をドラム１の回転軸方向に移動させることによ
り、全ての記録領域にインク像が形成できる。In this embodiment, first, the surface of the drum 1 is heated by the heater 7, the drum 1 is rotated at a constant speed in the direction of arrow A, and ink droplets are selectively ejected from the recording head 2. Form an image. By moving the recording head 2 in the rotation axis direction of the drum 1 in this manner, an ink image can be formed in all recording areas.
【００１２】ドラム１の表面に形成されたインク像は、
加熱されてインクに含まれる水分が蒸発し、その後にイ
ンクに含まれる熱可塑性樹脂が加熱される。このように
して水分が排除され、かつ加熱されたインク像は、圧力
ローラ３の位置に移動して記録紙８に押しつけられ、記
録用紙８に転写される。記録紙８は転写を受けた後、紙
案内９に沿って装置外に排出される。以上により記録動
作が行われる。インクや記録紙に初期的に含まれていた
水分、及び余剰となった熱は空気案内板５に沿って、排
気ファン４により、装置外に排出される。The ink image formed on the surface of the drum 1 is
Heating causes the moisture contained in the ink to evaporate, and thereafter the thermoplastic resin contained in the ink is heated. The heated ink image from which water has been removed in this way is moved to the position of the pressure roller 3, pressed against the recording paper 8, and transferred to the recording paper 8. After receiving the transfer, the recording paper 8 is discharged out of the apparatus along the paper guide 9. Thus, the recording operation is performed. The water initially contained in the ink or the recording paper and the excess heat are discharged to the outside of the apparatus by the exhaust fan 4 along the air guide plate 5.
【００１３】ところで記録動作中におけるドラム１の回
転によりドラム１の表面には図２（ａ）に示したように
ドラム１の周速（υで示す）と同一の速度を持ち、外周
に行くほど速度が低下する空気の粘性的流動が生じてい
る。この粘性による流動は、ドラム１の表面近傍におい
ては、ドラム表面との相対的な空気の速度は非常に小さ
く、ドラム１の表面上のインク像の近傍にはインク溶媒
が停滞し、湿度が高いため、インク像からの蒸発が阻害
される。By the way, the rotation of the drum 1 during the recording operation causes the surface of the drum 1 to have the same speed as the peripheral speed (indicated by υ) of the drum 1 as shown in FIG. There is a viscous flow of air that slows down. In the flow due to the viscosity, the velocity of the air relative to the surface of the drum 1 is very small near the surface of the drum 1, the ink solvent stays near the ink image on the surface of the drum 1, and the humidity is high. Therefore, evaporation from the ink image is inhibited.
【００１４】空気整流板Ｂ１０２は、その上流側の斜面
１０２ａによりドラム１の表面に沿って流れる空気をド
ラム表面１から剥離させてドラム１から離れる方向（図
中、矢印ｂ）に流し、また、ドラム１の回転方向の下流
側の斜面１０２ｂで生じた負圧により、ドラム１の外側
の空気をドラム１の表面に導入する方向（図中、矢印
ｃ）に流す。もとより、ドラム１の外側の空気は低湿で
あるため、ドラム１のインク像のインク溶媒の蒸発が促
進される。このような空気整流板Ｂ２０２を複数配設す
ることにより、ドラム表面のインク像を効果的に乾燥で
きる。The air straightening plate B102 separates the air flowing along the surface of the drum 1 from the drum surface 1 by the slope 102a on the upstream side and flows the air away from the drum 1 (arrow b in the drawing). Due to the negative pressure generated on the slope 102b on the downstream side in the rotation direction of the drum 1, the air outside the drum 1 flows in the direction of introducing air to the surface of the drum 1 (arrow c in the drawing). Naturally, since the air outside the drum 1 has low humidity, evaporation of the ink solvent of the ink image on the drum 1 is promoted. By disposing a plurality of such air rectifying plates B202, the ink image on the drum surface can be effectively dried.
【００１５】また、記録ヘッド２の近傍の上流側に配置
された空気整流板Ａ１０１は、同様の斜面１０１ａ、１
０１ｂが形成されていて、前述の空気整流板１０２と同
様の作用を奏する他に、空気整流板２０１の下流側に
は、ドラム１の外側から低温で、低湿な空気が流れ込む
から、記録ヘッド２の冷却が促進され、安定的な記録が
可能となり、また記録ヘッド２に低湿な空気が触れるか
ら、記録ヘッド２の結露が防止できる。The air rectifying plate A101 disposed on the upstream side in the vicinity of the recording head 2 has similar slopes 101a, 1a.
01b is formed, and in addition to exhibiting the same operation as the above-described air straightening plate 102, the low-temperature, low-humidity air flows from the outside of the drum 1 to the downstream side of the air straightening plate 201. The cooling of the recording head 2 is promoted, and stable recording can be performed, and the dew condensation of the recording head 2 can be prevented even if low-humidity air comes into contact with the recording head 2.
【００１６】また、空気整流板１０１、１０２のドラム
１と対向する面は、図からも明らかなようにドラム１の
表面に平行であるため、記録ヘッド２の直前の空気の流
れが均一化、つまり層流化されるために、排気ファン４
等によるインク滴噴射領域近傍の空気流の乱れが少なく
なり、インク滴の偏向を抑制することができる。Further, since the surfaces of the air flow regulating plates 101 and 102 facing the drum 1 are parallel to the surface of the drum 1 as is apparent from the drawing, the air flow immediately before the recording head 2 is made uniform. That is, the exhaust fan 4
The turbulence of the air flow in the vicinity of the ink droplet ejecting area due to the above-mentioned factors can be reduced, and the deflection of the ink droplet can be suppressed.
【００１７】なお、空気整流板２０１の下面とドラム１
の外周面との距離が、記録ヘッド２とドラム１との距離
よりも小さくなるように配置すると、記録紙の破片等、
異物が、記録ヘッド２の下部に突入するのを防止して、
異物による記録ヘッドの損傷といった事故が回避でき
る。The lower surface of the air flow regulating plate 201 and the drum 1
Is arranged so that the distance between the recording head 2 and the drum 1 is smaller than the distance between the recording head 2 and the drum 1.
Foreign matter is prevented from entering the lower part of the recording head 2,
Accidents such as damage to the recording head due to foreign matter can be avoided.
【００１８】なお、上述の実施例においては、転写方式
について説明したが、直接記録方式の記録装置に適用す
ることもできる。Although the transfer method has been described in the above embodiment, the present invention can be applied to a recording apparatus of a direct recording method.
【００１９】[0019]
【発明の効果】以上、説明したように本発明によれば、
ドラムの表面に粘性的流動により停滞するインク溶媒の
蒸気を効果的にドラム表面から排出することができ、イ
ンク像を高速に乾燥することができる。As described above, according to the present invention,
The vapor of the ink solvent stagnant on the surface of the drum due to the viscous flow can be effectively discharged from the drum surface, and the ink image can be dried at a high speed.
【図１】本発明の第１実施例を示すインクジェットプリ
ンタの断面図である。FIG. 1 is a cross-sectional view of an ink jet printer according to a first embodiment of the present invention.
【図２】本発明の空気整流板の効果を説明する模式図で
ある。FIG. 2 is a schematic diagram illustrating the effect of the air flow regulating plate of the present invention.
【図３】従来のドラム式のインクジェット記録装置の断
面図である。FIG. 3 is a sectional view of a conventional drum type ink jet recording apparatus.
【図４】従来の別のドラム式のインクジェット記録装置
の断面図である。FIG. 4 is a cross-sectional view of another conventional drum type ink jet recording apparatus.
１ ：ドラム ２ ：記録ヘッド ３ ：圧力ロール ４ ：排気ファン ５ ：空気案内板 ７ ：ヒータ ８ ：記録紙（記録媒体） ９ ：紙案内 １０１ ：空気整流板Ａ（空気整流板） １０２ ：空気整流板Ｂ（空気整流板） １０３ ：空気整流板Ｃ（空気整流板） ２０１ ：空気整流板Ａ（空気整流板） ２０２ ：空気整流板Ｂ（空気整流板） 1: Drum 2: Recording head 3: Pressure roll 4: Exhaust fan 5: Air guide plate 7: Heater 8: Recording paper (recording medium) 9: Paper guide 101: Air rectification plate A (Air rectification plate) 102: Air rectification Plate B (air rectifying plate) 103: Air rectifying plate C (air rectifying plate) 201: Air rectifying plate A (air rectifying plate) 202: Air rectifying plate B (air rectifying plate)
Claims (6)
記録ヘッドからインク滴を吐出させてインク像を形成
し、前記インク像の乾燥後に記録用紙に転写するインク
ジェット記録装置において、前記ドラム に対向し、かつ前記ドラムから一定間隔を隔
てて、前記ドラムの表面の空気流を剥離する空気整流板
を配置した転写式インクジェット記録装置。1. An ink jet recording apparatus for ejecting ink droplets from an ink jet recording head on a surface of a rotating drum to form an ink image and transferring the ink image to recording paper after the ink image has dried, wherein the ink jet recording device faces the drum and Keep a certain distance from the drum
And Te, air guide plates for separating the air flow on the surface of said drum
Is a transfer type ink jet recording apparatus.
ドラムの回転方向の上流側に、その上流側を前記ドラム
側とする斜面が形成されている請求項１に記載の転写式
インクジェット記録装置。Wherein at least the outer of the air guide plate
2. The transfer type ink jet recording apparatus according to claim 1, wherein a slope having the upstream side as the drum side is formed on the upstream side in the rotation direction of the drum.
転方向の下流側に、その下流側を前記ドラム側とする斜
面が形成されている請求項１に記載の転写式インクジェ
ット記録装置。3. The rotation of the drum outside the air straightening plate.
The transfer type ink jet recording apparatus according to claim 1, wherein a slope having the downstream side as the drum side is formed on the downstream side in the rolling direction .
向の上流側または下流側に前記ドラム側に傾斜する斜面
が形成されている請求項１に記載のインクジェット記録
装置。 4. A method for rotating the drum of the recording head.
The inkjet recording apparatus according to claim 1, wherein a slope inclined toward the drum is formed on an upstream side or a downstream side in a direction .
流側及び下流側に前記ドラム側に傾斜する斜面が形成さ
れている請求項１に記載のインクジェット記録装置。 5. The ink jet recording apparatus according to claim 1, wherein a slope inclined toward the drum is formed on an upstream side and a downstream side in a rotation direction of the drum of the recording head.
周面との距離が、前記記録ヘッドと前記ドラムの外周面
とのなす距離よりも前記ドラムの外周に近接して配設さ
れている請求項１に記載のインクジェット記録装置。6. A distance between a lower surface of the air straightening plate and an outer peripheral surface of the drum is closer to an outer periphery of the drum than a distance between the recording head and an outer peripheral surface of the drum. The inkjet recording apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28629495A JP3284297B2 (en) | 1995-11-02 | 1995-11-02 | Transfer type inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28629495A JP3284297B2 (en) | 1995-11-02 | 1995-11-02 | Transfer type inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09123434A JPH09123434A (en) | 1997-05-13 |
| JP3284297B2 true JP3284297B2 (en) | 2002-05-20 |
Family
ID=17702519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28629495A Expired - Lifetime JP3284297B2 (en) | 1995-11-02 | 1995-11-02 | Transfer type inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3284297B2 (en) |
-
1995
- 1995-11-02 JP JP28629495A patent/JP3284297B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09123434A (en) | 1997-05-13 |
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