JPH09239967A - Ink jet image-forming apparatus - Google Patents
Ink jet image-forming apparatusInfo
- Publication number
- JPH09239967A JPH09239967A JP4783496A JP4783496A JPH09239967A JP H09239967 A JPH09239967 A JP H09239967A JP 4783496 A JP4783496 A JP 4783496A JP 4783496 A JP4783496 A JP 4783496A JP H09239967 A JPH09239967 A JP H09239967A
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- image forming
- regulating member
- position regulating
- forming area
- 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
Landscapes
- Handling Of Sheets (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
- Ink Jet (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、画像情報に基づい
て複数のインク吐出口からインクを吐出して記録紙に画
像を形成するインクジェット方式画像形成装置に関し、
例えば、大判サイズの用紙に画像を形成するのに好適な
インクジェット方式画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet type image forming apparatus for forming an image on a recording paper by ejecting ink from a plurality of ink ejection ports based on image information.
For example, the present invention relates to an inkjet type image forming apparatus suitable for forming an image on a large-sized sheet.
【０００２】[0002]
【従来の技術】コンピュータやワークステーションの出
力装置の一つとして、インクを吐出して記録紙に画像を
形成するインクジェット方式画像形成装置が知られてい
る。このインクジェット方式画像形成装置は、例えば、
インクが吐出する複数のインク吐出口が形成されたイン
ク吐出面を有し所定方向に往復動するヘッドキャリッジ
と、この所定方向に直交する方向（記録紙搬送方向）に
記録紙を断続的に搬送する搬送部材とを備えている。記
録紙に画像を形成する際は、搬送部材で搬送中の記録紙
を一時的に停止させ、ヘッドキャリッジを上記の所定方
向に往復動させながら、記録紙のうち、インク吐出面の
前方に形成された画像形成領域に位置する面に、インク
吐出口からインクを吐出して１バンド分の画像を形成
（印字）し、その後、所定長さだけ記録紙を搬送して画
像形成領域に位置する新たな面に次のバンド分の画像を
形成する動作を繰り返す。2. Description of the Related Art As one of output devices of computers and workstations, there is known an ink jet type image forming apparatus which forms an image on recording paper by discharging ink. This inkjet type image forming apparatus is, for example,
A head carriage that has an ink ejection surface on which a plurality of ink ejection ports for ejecting ink are formed and that reciprocates in a predetermined direction; and recording paper is intermittently conveyed in a direction (recording paper conveyance direction) orthogonal to the predetermined direction. And a transport member for When forming an image on a recording sheet, the recording sheet being conveyed is temporarily stopped by the conveying member, and the head carriage is reciprocated in the above-mentioned predetermined direction to form an image in front of the ink ejection surface of the recording sheet. Ink is ejected from the ink ejection port on the surface located in the formed image forming area to form (print) an image for one band, and then the recording paper is conveyed by a predetermined length to be located in the image forming area. The operation of forming an image for the next band on the new surface is repeated.
【０００３】上記したインクジェット方式画像形成装置
では、インクを吐出して記録紙に印字すると、インクが
記録紙に吸収されて記録紙の繊維が部分的に膨張し、記
録紙に部分的に凹凸が形成されるコックリングという現
象が生じる。このコックリングが、印字が終了した面だ
けでなく、次に印字される面にも生じると、凹凸の山
部、谷部、斜面部に印字することとなるので、印字位置
が微妙に狂って画像に悪影響を及ぼして画質が低下す
る。In the above-mentioned ink jet type image forming apparatus, when ink is ejected and printing is performed on the recording paper, the ink is absorbed by the recording paper, the fibers of the recording paper are partially expanded, and unevenness is partially formed on the recording paper. A phenomenon called cockling is formed. If this cockling occurs not only on the printed surface but also on the next printed surface, it will print on the uneven ridges, valleys, and slopes. The image is adversely affected and the image quality deteriorates.
【０００４】コックリングを低減する技術として、繊維
の方向性がランダムな記録紙を用い、記録紙に吸収され
たインクにより、記録紙が一方向に伸長するのではなく
多方向に伸長するようにした技術が提案されている。し
かし、この技術では、記録紙のコストが高くなり、しか
も、コックリングを十分に低減できない。As a technique for reducing cockling, a recording paper in which the fiber orientation is random is used, and the ink absorbed in the recording paper causes the recording paper to extend in multiple directions rather than in one direction. The technology which was done is proposed. However, with this technique, the cost of recording paper becomes high, and moreover, cockling cannot be reduced sufficiently.
【０００５】コックリングを低減する他の技術として、
曲率の大きいローラに記録紙を巻き付けて搬送し、この
ローラに巻き付けられた記録紙面に印字する技術が提案
されている。しかし、画像形成装置全体の大きさを考慮
すると、ローラの曲率には上限がある。このため、ロー
ラに巻き付けられた記録紙面と複数のインク吐出口との
距離が、各インク吐出口ごとにそれぞれ異なるおそれが
ある。このような場合、形成された画像のうち、記録紙
との距離が遠いインク吐出口から吐出したインクにより
形成された部分では画質が低下する。As another technique for reducing cockling,
A technique has been proposed in which a recording paper is wound around a roller having a large curvature and conveyed, and printing is performed on the surface of the recording paper wound around the roller. However, considering the size of the entire image forming apparatus, there is an upper limit to the curvature of the roller. Therefore, the distance between the recording paper surface wound around the roller and the plurality of ink ejection ports may be different for each ink ejection port. In such a case, in the formed image, the image quality deteriorates in the portion formed by the ink ejected from the ink ejection port that is far from the recording paper.
【０００６】コックリングを低減するさらに他の技術と
して、記録紙に印字する際に、ヘッドキャリッジを記録
紙の同一面（同一バンド）上で何度も往復動（スキャニ
ング）させて、記録紙の同一面にインクを少しづつ何回
かに分けて吐出させることにより印字するマルチスキャ
ン方式という技術が提案されている。しかし、この技術
では、ヘッドキャリッジを何度もスキャニングさせるの
で、その分時間がかかる。As yet another technique for reducing cockling, when printing on a recording paper, the head carriage is repeatedly reciprocated (scanning) on the same surface (same band) of the recording paper so that the recording paper is printed. A technique called a multi-scan system has been proposed in which ink is printed little by little on the same surface by ejecting the ink several times. However, in this technique, the head carriage is scanned many times, which takes time.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上記事情に
鑑み、コックリングを抑制して画質を向上させたインク
ジェット方式画像形成装置を提供することを目的とす
る。SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide an ink jet type image forming apparatus which suppresses cockling and improves image quality.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
の本発明のインクジェット方式画像形成装置は、インク
が吐出する複数のインク吐出口が形成されたインク吐出
面を有するヘッドキャリッジを所定方向に往復動させる
と共に、この所定方向に交差する方向に記録紙を搬送
し、記録紙のうち、上記インク吐出面の前方の画像形成
領域に位置する面に、画像情報に基づいて上記インク吐
出口からインクを吐出させて画像を形成するインクジェ
ット方式画像形成装置において、 （１）上記画像形成領域よりも記録紙搬送方向上流側に
配置された、記録紙を挟持しながら搬送する第１搬送部
材 （２）上記画像形成領域よりも記録紙搬送方向下流側に
配置された、記録紙を挟持しながら搬送する第２搬送部
材 （３）記録紙の両面のうちのいずれか一方の面を押さえ
てこの記録紙の位置を規制する、上記第１搬送部材と上
記画像形成領域との間に配置された細線状の第１位置規
制部材 （４）記録紙の両面のうちのいずれか一方の面を押さえ
てこの記録紙の位置を規制することにより、上記第１位
置規制部材と協働して、この記録紙のうち上記画像形成
領域に位置する面を引っ張ると共にこの面と上記インク
吐出面との間隔を所定距離に保つ、上記画像形成領域と
上記第２搬送部材との間に配置された細線状の第２位置
規制部材 （５）記録紙のうち上記画像形成領域に位置する面と上
記インク吐出面とを平行に保つように上記第２位置規制
部材の位置を調整する、上記第２位置規制部材に着脱自
在に固定された水平確保部材を備えたことを特徴とする
ものである。In order to achieve the above-mentioned object, an ink jet type image forming apparatus of the present invention has a head carriage which has an ink ejection surface on which a plurality of ink ejection ports for ejecting ink are formed in a predetermined direction. While reciprocating, the recording paper is conveyed in a direction intersecting with the predetermined direction, and on the surface of the recording paper located in the image forming area in front of the ink ejection surface, from the ink ejection port based on the image information. In an inkjet type image forming apparatus that ejects ink to form an image, (1) a first conveying member that is arranged upstream of the image forming area in the recording sheet conveying direction and that conveys a recording sheet while sandwiching it (2) ) A second conveying member, which is arranged on the downstream side in the recording paper conveyance direction with respect to the image forming area and conveys the recording paper while sandwiching the recording paper. (3) Any one of both sides of the recording paper A fine line-shaped first position restricting member arranged between the first transport member and the image forming area for restricting the position of the recording paper by pressing one surface (4) Of both surfaces of the recording paper By pressing one of the surfaces to regulate the position of the recording paper, in cooperation with the first position regulating member, the surface of the recording paper located in the image forming area is pulled and A thin line-shaped second position regulating member arranged between the image forming area and the second conveying member for maintaining a predetermined distance from the ink ejection surface. (5) In the image forming area of the recording paper. A horizontal securing member removably fixed to the second position regulating member for adjusting the position of the second position regulating member so as to keep the positioned surface and the ink ejection surface parallel to each other. To do.
【０００９】ここで、上記第１及び上記第２位置規制部
材が、記録紙を押さえる曲面を有するものであることが
好ましい。Here, it is preferable that the first and second position restricting members have curved surfaces for pressing the recording paper.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して、本発明の
インクジェット方式画像形成装置の実施形態を説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an inkjet type image forming apparatus of the present invention will be described below with reference to the drawings.
【００１１】図１は、インクジェット方式画像形成装置
の一例であるカラープロッター（以下、プロッターとい
う）の概略構成を示す斜視図である。FIG. 1 is a perspective view showing a schematic structure of a color plotter (hereinafter referred to as a plotter) which is an example of an ink jet type image forming apparatus.
【００１２】プロッター１は、キャスター２ａ付きのス
タンド２の上部に固定されている。プロッター１は、プ
ロッター１を操作するための操作部３を備えており、こ
の操作部３に設置された各種のスイッチ等により、紙
種、オンライン／オフライン、コマンドなどが指示され
る。矢印Ａ方向から記録紙挿入口４に挿入された記録紙
は、操作部３からの指示に基づいて、プロッター１の内
部に搬送され、カラー画像が印字されて排出される。The plotter 1 is fixed to the upper portion of a stand 2 having casters 2a. The plotter 1 includes an operation unit 3 for operating the plotter 1, and various types of switches and the like installed on the operation unit 3 are used to instruct paper types, online / offline, commands, and the like. The recording paper inserted into the recording paper insertion port 4 from the direction of arrow A is conveyed to the inside of the plotter 1 based on an instruction from the operation unit 3, and a color image is printed and discharged.
【００１３】図２を参照して、記録紙の搬送経路を説明
する。The conveyance path of the recording paper will be described with reference to FIG.
【００１４】図２は、記録紙の挿入から排出までの搬送
経路を示す斜視図である。プロッター１では、記録紙挿
入口４から挿入された記録紙と、ロール状に巻かれた記
録紙（ロール紙５）に印字できる。ここでは、記録紙挿
入口４から挿入された記録紙の搬送経路を説明する。FIG. 2 is a perspective view showing a conveyance path from the insertion of the recording paper to the ejection of the recording paper. The plotter 1 can print on the recording paper inserted from the recording paper insertion port 4 and the recording paper (roll paper 5) wound in a roll. Here, the conveyance path of the recording paper inserted from the recording paper insertion port 4 will be described.
【００１５】ロール紙５のカバー６上で記録紙（例え
ば、大判のカット紙）を整置して矢印Ａ方向から記録紙
挿入口４に挿入する。挿入された記録紙は、カバー６と
上ガイド７との間を通り、下搬送コロ支持板８に取り付
けられた紙搬送コロ９ａ，９ｂ及び上搬送コロ支持板１
０に取り付けられた紙搬送コロ９ｃと駆動ローラ１１
（紙搬送コロ９ｃと駆動ローラ１１が本発明にいう第１
搬送部材の一例である）とに挟持されながら、第１位置
規制部材１２を経て印字板１３の上方（本発明にいう画
像形成領域の一例である）に到達する。印字板１３の記
録紙搬送方向下流側部分に配置された第２位置規制部材
１４を通過した記録紙は、その後、排出ローラ１９と拍
車２０（本発明にいう第２搬送部材の一例である）とに
挟持されて排出される。搬送されている記録紙のうち、
印字板１３の上方に位置する部分は、後述するように、
第１位置規制部材１２と第２位置規制部材１４とで規制
されることにより平面性が維持される。なお、プロッタ
ー１は、駆動ローラ１１や排出ローラ１９等を回転させ
るためのギア１１ａ，２０ａ，２１ａを備えている。A recording sheet (for example, a large-sized cut sheet) is aligned on the cover 6 of the roll sheet 5 and inserted into the recording sheet insertion port 4 in the direction of arrow A. The inserted recording paper passes between the cover 6 and the upper guide 7, and the paper conveying rollers 9a and 9b and the upper conveying roller supporting plate 1 attached to the lower conveying roller supporting plate 8 are inserted.
Paper feed roller 9c and drive roller 11 attached to 0
(The paper transport roller 9c and the drive roller 11 are the first in the present invention.
While being sandwiched between the sheet and the conveyance member (which is an example of the conveying member), the sheet reaches the upper side of the printing plate 13 (which is an example of the image forming area in the present invention) via the first position regulating member 12. The recording paper that has passed through the second position regulating member 14 disposed on the downstream side of the printing plate 13 in the recording paper conveyance direction is then discharged by the discharge roller 19 and the spur 20 (which is an example of the second conveyance member in the present invention). It is sandwiched between and and discharged. Of the recording paper being transported,
The part located above the printing plate 13 is, as described later,
The planarity is maintained by being restricted by the first position restricting member 12 and the second position restricting member 14. The plotter 1 includes gears 11a, 20a, 21a for rotating the drive roller 11, the discharge roller 19, and the like.
【００１６】図３を参照して、記録紙に印字する印字工
程について説明する。The printing process for printing on recording paper will be described with reference to FIG.
【００１７】図３は、プロッター１の印字部を示す斜視
図である。FIG. 3 is a perspective view showing the printing portion of the plotter 1.
【００１８】印字部は、矢印Ｂ方向（本発明にいう所定
方向の一例である）に往復動するヘッドキャリッジ１５
を備えている。ヘッドキャリッジ１５はヘッドホルダ１
６を備えており、このヘッドホルダ１６には、各カラー
インク（例えばシアン、マゼンタ、イエロー、黒の各イ
ンク）が収納された複数の印字ヘッド１７が装着されて
いる。印字ヘッド１７のインク吐出面２８（図４参照）
には、インクが吐出する複数のインク吐出口（図示せ
ず）が形成されている。The print portion is a head carriage 15 that reciprocates in the direction of arrow B (which is an example of the predetermined direction in the present invention).
It has. The head carriage 15 is the head holder 1
The head holder 16 is provided with a plurality of print heads 17 in which the color inks (for example, cyan, magenta, yellow, and black inks) are stored. Ink ejection surface 28 of print head 17 (see FIG. 4)
A plurality of ink ejection ports (not shown) through which ink is ejected are formed in the.
【００１９】ヘッドキャリッジ１５は、駆動源（図示せ
ず）に掛設されたベルト２９に固定されており、このベ
ルト２９は、駆動源の正逆回転によって矢印Ｂ方向に往
復動する。ベルト２９が矢印Ｂ方向に往復動すると、ヘ
ッドキャリッジ１５は案内レール１８に案内されて矢印
Ｂ方向に往復動する。The head carriage 15 is fixed to a belt 29 suspended from a drive source (not shown), and the belt 29 reciprocates in the direction of arrow B by the forward and reverse rotation of the drive source. When the belt 29 reciprocates in the arrow B direction, the head carriage 15 is guided by the guide rail 18 and reciprocates in the arrow B direction.
【００２０】記録紙は、矢印Ｂ方向に直交する方向（記
録紙搬送方向）に断続的に搬送される。記録紙に画像を
形成するときは、記録紙を一時的に停止させ、ヘッドキ
ャリッジ１５を矢印Ｂ方向に往復動させながら、記録紙
のうち、インク吐出面２８（図４参照）の前方に形成さ
れた画像形成領域に位置する面に、印字ヘッド１７に入
力された画像情報に基づいてインク吐出口からインクを
吐出する。その後、所定長さだけ記録紙を搬送して画像
形成領域に位置する新たな面に次のバンド分の画像を形
成する。この動作を記録紙の全長に亘って繰り返す。こ
れにより、記録紙にカラー画像が形成される。カラー画
像が形成された記録紙は排出ローラ１９とその上方にあ
る拍車２０に挟持されながら排出ガイド２１に沿って排
出される。The recording paper is intermittently conveyed in a direction orthogonal to the arrow B direction (recording paper conveyance direction). When an image is formed on the recording paper, the recording paper is temporarily stopped and the head carriage 15 is reciprocated in the direction of arrow B, and is formed in front of the ink ejection surface 28 (see FIG. 4) of the recording paper. Ink is ejected from the ink ejection port based on the image information input to the print head 17 to the surface located in the formed image forming area. Then, the recording paper is conveyed by a predetermined length and an image for the next band is formed on a new surface located in the image forming area. This operation is repeated over the entire length of the recording paper. As a result, a color image is formed on the recording paper. The recording paper on which the color image is formed is ejected along the ejection guide 21 while being sandwiched between the ejection roller 19 and the spur 20 above it.
【００２１】図２、図４、及び図５を参照して、上述し
た第１位置規制部材１２及び第２位置規制部材１４につ
いて説明する。With reference to FIGS. 2, 4 and 5, the above-mentioned first position restricting member 12 and second position restricting member 14 will be described.
【００２２】図４は、第１位置規制部材及び第２位置規
制部材を示す断面図であり、図５は、第１位置規制部材
及び第２位置規制部材の周辺を拡大して示す断面図であ
る。FIG. 4 is a sectional view showing the first position regulating member and the second position regulating member, and FIG. 5 is an enlarged sectional view showing the periphery of the first position regulating member and the second position regulating member. is there.
【００２３】第１位置規制部材１２及び第２位置規制部
材１４は、矢印Ｂ方向（記録紙搬送方向に直交する方
向）に延びている。第１位置規制部材１２が記録紙２７
を押さえる位置は、駆動ローラ１１と紙搬送コロ９ｃと
が記録紙２７を挟持する位置よりも、図４の紙面の下方
である。一方、第２位置規制部材１４が記録紙２７を押
さえる位置は、排出ローラ１９と拍車２０とが記録紙２
７を挟持する位置よりも、図４の紙面の上方である。ま
た、第１位置規制部材１２は、細線状の部材で構成され
ており、矢印Ｂ方向に張られた状態になっている。第１
位置規制部材１２の、記録紙を押さえる部分は曲面１２
ａになっており、これにより、記録紙のスムーズな搬送
を確保できる。The first position restricting member 12 and the second position restricting member 14 extend in the direction of arrow B (direction orthogonal to the recording paper conveyance direction). The first position regulating member 12 is the recording paper 27.
The position for pressing is lower than the position where the drive roller 11 and the paper transport roller 9c nip the recording paper 27, below the paper surface of FIG. On the other hand, at the position where the second position regulating member 14 presses the recording paper 27, the discharge roller 19 and the spur 20 are located at the recording paper 2 position.
It is above the plane of FIG. 4 from the position where 7 is sandwiched. The first position regulating member 12 is made of a thin wire member and is stretched in the arrow B direction. First
The portion of the position regulating member 12 that presses the recording paper is the curved surface 12
Since it is a, the smooth conveyance of the recording paper can be ensured.
【００２４】図２に示すように、第１位置規制部材１２
の一端部１２ａは、記録紙搬送方向に移動自在に右側板
２２に固定された右位置板２３を介して右側板２２に固
定されている。一方、第１位置規制部材１２の他端部１
２ｂは、記録紙搬送方向に移動自在に左側板２４に固定
された左位置板２５の切欠を通ってばね２６に接続され
ており、これにより、第１位置規制部材１２は、一定の
張力が常に与えられた状態で固定されている。このよう
に第１位置規制部材１２に一定の張力を与えることによ
り、第１位置規制部材１２の直線性が正確に確保され
る。また、第１位置規制部材１２が摩擦熱などによって
伸びた場合、その伸長分をばね２６で吸収できる。第１
位置規制部材１２の位置の調整は、右位置板２３と左位
置板２５を移動させ、第１位置規制部材１２が案内レー
ル１８（図３参照）に平行になるように調整する。As shown in FIG. 2, the first position regulating member 12
One end portion 12a of the is fixed to the right side plate 22 via a right position plate 23 fixed to the right side plate 22 so as to be movable in the recording paper conveyance direction. On the other hand, the other end portion 1 of the first position regulating member 12
2b is connected to the spring 26 through the notch of the left position plate 25 fixed to the left side plate 24 so as to be movable in the recording paper conveyance direction, whereby the first position regulating member 12 has a constant tension. It is always fixed in the given state. By applying a constant tension to the first position regulating member 12 in this way, the linearity of the first position regulating member 12 is accurately ensured. Further, when the first position restricting member 12 is expanded by frictional heat or the like, the expanded portion can be absorbed by the spring 26. First
The position of the position regulating member 12 is adjusted by moving the right position plate 23 and the left position plate 25 so that the first position regulating member 12 is parallel to the guide rail 18 (see FIG. 3).
【００２５】一方、第２位置規制部材１４は、印字板１
３の、記録紙搬送方向下流側の部分に水平確保部材３０
を介して固定されており、案内レール１８および第１位
置規制部材１２に平行になっている。この水平確保部材
３０は、記録紙のうち画像形成領域に位置する面とイン
ク吐出面２８（図４参照）とを平行に保つように第２位
置規制部材１４の位置を調整するものであり、第２位置
規制部材１４と印字板１３に着脱自在に固定されてい
る。したがって、記録紙の厚さなどが変わり、記録紙の
うち画像形成領域に位置する面とインク吐出面２８（図
４参照）とを平行に保てなくなった場合は、サイズの異
なる水平確保部材３０を用いることにより、記録紙のう
ち画像形成領域に位置する面とインク吐出面２８とを平
行に保てる。また、第２位置規制部材１４は、矢印Ｂ方
向に延びる断面Ｄの字状の細線状のものであり、平らな
面で水平確保部材３０に接触している。さらに、第２位
置規制部材１４の、記録紙を押さえる部分は曲面１４ａ
になっており、これにより、記録紙のスムーズな搬送と
第２位置規制部材１４の直線性を確保できる。On the other hand, the second position regulating member 14 is the printing plate 1
3, the horizontal securing member 30 is provided on the downstream side of the recording paper conveyance direction.
Is fixed via the guide rail 18 and is parallel to the guide rail 18 and the first position regulating member 12. The horizontal securing member 30 adjusts the position of the second position regulating member 14 so as to keep the surface of the recording paper located in the image forming area and the ink ejection surface 28 (see FIG. 4) in parallel. The second position regulating member 14 and the printing plate 13 are detachably fixed. Therefore, when the thickness of the recording paper is changed and the surface of the recording paper located in the image forming area and the ink ejection surface 28 (see FIG. 4) cannot be kept parallel to each other, the horizontal securing members 30 of different sizes are used. By using, the surface of the recording paper located in the image forming area and the ink ejection surface 28 can be kept parallel. The second position restricting member 14 is a thin wire having a cross section D and extending in the direction of the arrow B, and is in contact with the horizontal securing member 30 with a flat surface. Further, the portion of the second position regulating member 14 that presses the recording paper is the curved surface 14a.
As a result, smooth conveyance of the recording paper and the linearity of the second position regulating member 14 can be ensured.
【００２６】上述したように、案内レール１８、第１位
置規制部材１２、及び第２位置規制部材１４を互いに平
行にすることにより、駆動ローラ１１と搬送コロ９ｃと
に挟持され搬送されてきた記録紙は、第１位置規制部材
１２の曲面１２ａに押えられて位置が規制され、さら
に、第２位置規制部材１４の曲面１４ａに押えられて位
置が規制される。これにより、記録紙のうち画像形成領
域に位置する面２７ａとインク吐出面２８との間隔を、
印字ヘッド１７の移動位置に拘わらず一定に保つことが
でき、良質の画像を得ることができる。As described above, by making the guide rail 18, the first position regulating member 12 and the second position regulating member 14 parallel to each other, the recording carried by the driving roller 11 and the carrying roller 9c is carried. The paper is pressed by the curved surface 12a of the first position restricting member 12 to restrict its position, and further pressed by the curved surface 14a of the second position restricting member 14 to restrict its position. As a result, the distance between the surface 27a of the recording paper located in the image forming area and the ink ejection surface 28 is
The print head 17 can be kept constant regardless of the moving position, and a good quality image can be obtained.
【００２７】図４に詳細に示すように、記録紙２７は、
紙搬送コロ９ａ，９ｂ，９ｃに押えられて駆動ローラ１
１に巻き付くように矢印Ｃ方向から搬送される。紙搬送
コロ９ｃを通過した記録紙２７は、第１位置規制部材１
２によって上方から上面を押えられながら搬送される。
さらに、画像形成領域を通過した記録紙２７は、第２位
置規制部材１４によって下方から下面を押えられなが
ら、画像形成領域で印字ヘッド１７によって印字され
る。ここでは、第１位置規制部材１２及び第２位置規制
部材１４によって、それぞれ、記録紙２７の上面と下面
を押さえるように構成したが、押さえる面を逆にしても
よい。また、第１位置規制部材１２及び第２位置規制部
材１４双方が、記録紙２７の上面または下面のいずれか
一方だけを押さえるように構成してもよい。As shown in detail in FIG. 4, the recording paper 27 is
The drive roller 1 is pressed by the paper transport rollers 9a, 9b, 9c.
1 is conveyed from the direction of arrow C so as to wind around 1. The recording paper 27 that has passed the paper transport roller 9c is transferred to the first position regulating member 1
The sheet is conveyed while being pressed from above by the upper surface 2.
Further, the recording paper 27 that has passed through the image forming area is printed by the print head 17 in the image forming area while the lower surface is pressed from below by the second position regulating member 14. Here, the first position regulating member 12 and the second position regulating member 14 are configured to press the upper surface and the lower surface of the recording paper 27, respectively, but the pressing surfaces may be reversed. Further, both the first position restricting member 12 and the second position restricting member 14 may be configured to press only one of the upper surface and the lower surface of the recording paper 27.
【００２８】第１位置規制部材としては、金属製の単線
や、ワイヤを撚った細線を用いる。また、記録紙との摩
擦による摩擦音を低減するために、ナイロンやテフロン
等の樹脂コーティングを施したワイヤなどを用いてもよ
い。第２位置規制部材１４も直線性が要求されるので、
モールド部材、板金等で作成されるが、鋼製の直径５ｍ
ｍの丸棒が実験では良かった。As the first position regulating member, a metal single wire or a thin wire formed by twisting a wire is used. Further, in order to reduce frictional noise due to friction with the recording paper, a wire coated with a resin such as nylon or Teflon may be used. Since the second position regulating member 14 is also required to have linearity,
It is made of mold material, sheet metal, etc., but has a steel diameter of 5 m
The round bar of m was good in the experiment.
【００２９】上述したように、記録紙２７は、駆動ロー
ラ１１と紙搬送コロ９ａ，９ｂ，９ｃとに挟持され、第
１位置規制部材１２で上面を押えられると共に第２位置
規制部材１４で下面を押えられながら、さらに排出ロー
ラ１９と拍車２０とに挟持されて搬送され、矢印Ｄ方向
に排出される。したがって、搬送中の記録紙２７のう
ち、インク吐出面２８の前方（印字板１３の上方）の画
像形成領域に位置する面は、第１位置規制部材１２と第
２位置規制部材１４とにより引っ張られる。このため、
インク吐出口（図示せず）から吐出したインクが記録紙
に吸収されて記録紙の繊維が膨張しても記録紙にはほと
んど凹凸が形成されず、コックリングを抑制できる。さ
らに、画像形成領域に位置する記録紙面は、第１位置規
制部材１２と第２位置規制部材１４とで引っ張られるこ
とにより平面となるので、大判サイズの記録紙を使って
も、画像形成領域に位置する記録紙面とインク吐出面２
８との間隔を所定距離に保つことができ、良好に印字で
きる。As described above, the recording paper 27 is sandwiched between the drive roller 11 and the paper conveying rollers 9a, 9b, 9c, the upper surface of the recording paper 27 is pressed by the first position restricting member 12, and the lower surface of the second position restricting member 14 is pressed. While being pressed, it is further sandwiched between the discharge roller 19 and the spur 20 and conveyed, and discharged in the direction of arrow D. Therefore, the surface of the recording paper 27 being conveyed, which is located in the image forming region in front of the ink ejection surface 28 (above the printing plate 13), is pulled by the first position regulating member 12 and the second position regulating member 14. To be For this reason,
Even if the ink ejected from the ink ejection port (not shown) is absorbed by the recording paper and the fibers of the recording paper expand, almost no unevenness is formed on the recording paper, and cockling can be suppressed. Further, since the recording paper surface located in the image forming area becomes a flat surface by being pulled by the first position regulating member 12 and the second position regulating member 14, even if a large size recording paper is used, Recording paper surface and ink ejection surface 2
8 can be maintained at a predetermined distance, and good printing can be performed.
【００３０】ここでは、第１位置規制部材１２として細
線状の部材を使用しているので、ローラを使用した場合
のように偏心を考慮する必要がなく、設計が容易とな
る。また、細線状の部材を装置本体の側板を利用して引
っ張るので、細線状部材の直線性を容易に確保でき、大
判サイズの記録紙に印字する場合であっても、記録紙の
平面性を確保できる。Here, since a thin wire member is used as the first position restricting member 12, it is not necessary to consider the eccentricity as in the case of using a roller, and the design is easy. Further, since the thin linear member is pulled by using the side plate of the apparatus main body, the linearity of the thin linear member can be easily secured, and even when printing on a large size recording paper, the flatness of the recording paper can be maintained. Can be secured.
【００３１】また、第１位置規制部材１２は細線状部材
で構成されているためスペースをとらないから、第１位
置規制部材１２を印字ヘッド１７に接近させることがで
きる。これにより、第１位置規制部材１２と第２位置規
制部材１４との距離を短くでき、画像形成領域に位置す
る記録紙面を高精度の平面にでき、良好な画像を得るこ
とができる。Further, since the first position restricting member 12 is made of a thin wire member and does not take up a space, the first position restricting member 12 can be brought close to the print head 17. As a result, the distance between the first position regulating member 12 and the second position regulating member 14 can be shortened, the recording paper surface located in the image forming area can be made into a highly accurate flat surface, and a good image can be obtained.
【００３２】なお、画像形成領域に位置する記録紙面と
印字ヘッド１７との間隔を１〜２ｍｍとし、この記録紙
と印字板との間隔を少なくとも２〜５ｍｍとしておくと
よい。また、記録紙２７の厚さに応じて、第１位置規制
部材１２と第２位置規制部材１４の位置を上下に調整す
ることにより、記録紙２７の厚さが変わっても良好な画
像を得ることができる。The distance between the recording paper surface located in the image forming area and the print head 17 may be 1 to 2 mm, and the distance between the recording paper and the printing plate may be at least 2 to 5 mm. Further, by adjusting the positions of the first position regulating member 12 and the second position regulating member 14 up and down according to the thickness of the recording paper 27, a good image can be obtained even if the thickness of the recording paper 27 changes. be able to.
【００３３】[0033]
【発明の効果】以上説明したように、本発明のインクジ
ェット方式画像形成装置によれば、記録紙は第１搬送部
材及び第２搬送部材に挟持されながら搬送され、第１搬
送部材と画像形成領域との間で細線状の第１位置規制部
材によって記録紙の両面のうちいずれか一方の面を押え
られると共に、第２搬送部材と画像形成領域との間で細
線状の第２位置規制部材によって記録紙の両面のうちい
ずれか一方の面を押えられ、搬送中の記録紙のうち画像
形成領域に位置する面が引っ張られると共にこの面とイ
ンク吐出面との間隔が所定距離に保たれる。この結果、
インク吐出口から吐出したインクが記録紙に吸収されて
記録紙の繊維が膨張しても記録紙に凹凸が形成されず、
コックリングを抑制できる。また、画像形成領域に位置
する記録紙面は、第１位置規制部材と第２位置規制部材
とで引っ張られることにより平面となるので、大判サイ
ズの記録紙を使っても、画像形成領域に位置する記録紙
面とインク吐出面との間隔を一定に保つことができ、良
好に印字できる。さらに、第２位置規制部材に着脱自在
に固定された水平確保部材によって、記録紙のうち画像
形成領域に位置する面とインク吐出面とを平行に保つよ
うに第２位置規制部材の位置を調整できる。このため、
記録紙の厚さなどが変わり、記録紙のうち画像形成領域
に位置する面とインク吐出面とを平行に保てなくなった
場合は、水平確保部材によって第２位置規制部材の位置
を調整することにより、記録紙のうち画像形成領域に位
置する面とインク吐出面とを平行に保てる。As described above, according to the ink jet type image forming apparatus of the present invention, the recording paper is conveyed while being sandwiched between the first conveying member and the second conveying member, and the first conveying member and the image forming area. The first position regulating member having a thin line shape presses one of the two surfaces of the recording sheet between the second conveying member and the image forming area, and the second position regulating member has a thin line shape. One of the two surfaces of the recording paper is pressed, the surface of the recording paper being conveyed that is located in the image forming area is pulled, and the distance between this surface and the ink ejection surface is maintained at a predetermined distance. As a result,
Even when the ink ejected from the ink ejection port is absorbed by the recording paper and the fibers of the recording paper expand, the unevenness is not formed on the recording paper,
Cockling can be suppressed. Further, since the recording paper surface located in the image forming area becomes a flat surface by being pulled by the first position restricting member and the second position restricting member, even if a large size recording paper is used, it is located in the image forming area. The distance between the recording paper surface and the ink ejection surface can be kept constant, and good printing can be performed. Further, the horizontal securing member detachably fixed to the second position regulating member adjusts the position of the second position regulating member so as to keep the surface of the recording paper positioned in the image forming area and the ink ejection surface parallel to each other. it can. For this reason,
When the thickness of the recording paper changes and the surface of the recording paper located in the image forming area and the ink ejection surface cannot be kept parallel, the position of the second position regulating member should be adjusted by the horizontal securing member. This makes it possible to keep the surface of the recording paper located in the image forming area and the ink ejection surface parallel to each other.
【００３４】ここで、第１及び第２位置規制部材が、記
録紙を押さえる曲面を有するものである場合は、記録紙
のスムーズな搬送を確保できる。Here, when the first and second position regulating members have curved surfaces for pressing the recording paper, the smooth transportation of the recording paper can be ensured.
【図１】インクジェット方式画像形成装置の一例である
カラープロッターの概略構成を示す斜視図である。FIG. 1 is a perspective view showing a schematic configuration of a color plotter which is an example of an inkjet image forming apparatus.
【図２】１のカラープロッターを切り欠いて、記録紙の
挿入から排出までの経路を示す斜視図である。FIG. 2 is a perspective view showing a path from the insertion of the recording paper to the ejection of the recording paper, with the color plotter 1 cut out.
【図３】図１のプロッターの印字部を示す斜視図であ
る。FIG. 3 is a perspective view showing a printing unit of the plotter of FIG.
【図４】第１位置規制部材と第２位置規制部材を示す断
面図である。FIG. 4 is a cross-sectional view showing a first position restricting member and a second position restricting member.
【図５】第１位置規制部材及び第２位置規制部材の周辺
を拡大して示す断面図である。FIG. 5 is an enlarged cross-sectional view showing the periphery of a first position restricting member and a second position restricting member.
１ プロッター ９ａ，９ｂ，９ｃ 紙搬送コロ １１ 駆動ローラ １２ 第１位置規制部材 １４ 第２位置規制部材 １９ 排出ローラ ２０ 拍車 ２６ ばね ２８ インク吐出面 ３０ 水平確保部材 DESCRIPTION OF SYMBOLS 1 Plotter 9a, 9b, 9c Paper conveyance roller 11 Drive roller 12 1st position regulation member 14 2nd position regulation member 19 Discharge roller 20 Spur 26 Spring 28 Ink ejection surface 30 Horizontal securing member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 猪妻 権介 東京都三鷹市下連雀６丁目３番３号 コピ ア株式会社内 (72)発明者 清原 直樹 東京都三鷹市下連雀６丁目３番３号 コピ ア株式会社内 (72)発明者 行方 清一 東京都三鷹市下連雀６丁目３番３号 コピ ア株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Gonsuke Inomata 6-3-3 Shimorenjaku, Mitaka-shi, Tokyo Within Copia Corporation (72) Inventor Naoki Kiyohara 6-3-3 Shimorenjaku, Mitaka-shi, Tokyo Copier Co., Ltd. (72) Inventor, Seiichi 6-3 Shimorenjaku, Mitaka City, Tokyo Copier Co., Ltd.
Claims (2)
形成されたインク吐出面を有するヘッドキャリッジを所
定方向に往復動させると共に、該所定方向に交差する方
向に記録紙を搬送し、記録紙のうち、前記インク吐出面
の前方の画像形成領域に位置する面に、画像情報に基づ
いて前記インク吐出口からインクを吐出させて画像を形
成するインクジェット方式画像形成装置において、 前記画像形成領域よりも記録紙搬送方向上流側に配置さ
れた、記録紙を挟持しながら搬送する第１搬送部材と、 前記画像形成領域よりも記録紙搬送方向下流側に配置さ
れた、記録紙を挟持しながら搬送する第２搬送部材と、 記録紙の両面のうちのいずれか一方の面を押さえて該記
録紙の位置を規制する、前記第１搬送部材と前記画像形
成領域との間に配置された細線状の第１位置規制部材
と、 記録紙の両面のうちのいずれか一方の面を押さえて該記
録紙の位置を規制することにより、前記第１位置規制部
材と協働して、該記録紙のうち前記画像形成領域に位置
する面を引っ張ると共に該面と前記インク吐出面との間
隔を所定距離に保つ、前記画像形成領域と前記第２搬送
部材との間に配置された細線状の第２位置規制部材と、 記録紙のうち前記画像形成領域に位置する面と前記イン
ク吐出面とを平行に保つように前記第２位置規制部材の
位置を調整する、前記第２位置規制部材に着脱自在に固
定された水平確保部材とを備えたことを特徴とするイン
クジェット方式画像形成装置。1. A recording paper which conveys a recording paper in a direction intersecting the predetermined direction while reciprocating a head carriage having an ink ejection surface on which a plurality of ink ejection ports for ejecting ink are formed. Among these, in an inkjet type image forming apparatus that forms an image by ejecting ink from the ink ejection port based on image information on a surface located in the image forming area in front of the ink ejecting surface, And a first conveying member that is arranged upstream in the recording paper conveyance direction and conveys the recording paper while sandwiching it, and a recording paper that is arranged downstream in the recording paper conveyance direction from the image forming area and conveys the recording paper while sandwiching the recording paper. Is disposed between the first conveying member and the image forming area, which presses one of the two surfaces of the recording paper to regulate the position of the recording paper. The first position regulating member in the form of a fine line and the first position regulating member in cooperation with the first position regulating member by pressing one of the two surfaces of the recording paper to regulate the position of the recording paper. A thin line disposed between the image forming area and the second conveying member, which pulls a surface of the recording paper located in the image forming area and maintains a distance between the surface and the ink ejection surface at a predetermined distance. Second position regulating member for adjusting the position of the second position regulating member so as to keep the surface of the recording paper positioned in the image forming area and the ink ejection surface parallel to each other An inkjet image forming apparatus, comprising: a horizontal securing member detachably fixed to the member.
記録紙を押さえる曲面を有するものであることを特徴と
する請求項１記載のインクジェット方式画像形成装置。2. The first and second position restricting members,
The inkjet image forming apparatus according to claim 1, wherein the inkjet image forming apparatus has a curved surface that presses the recording paper.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4783496A JP3278344B2 (en) | 1996-03-05 | 1996-03-05 | Ink jet type image forming apparatus |
| EP02006740A EP1221378A3 (en) | 1996-01-22 | 1997-01-21 | Ink-jet image forming device |
| US09/101,415 US6161973A (en) | 1996-01-22 | 1997-01-21 | Ink-jet image forming device |
| DE69723054T DE69723054T2 (en) | 1996-01-22 | 1997-01-21 | INK DRAWING DEVICE RUNNING |
| PCT/JP1997/000114 WO1997027055A1 (en) | 1996-01-22 | 1997-01-21 | Ink-jet image forming device |
| EP97900468A EP0876913B1 (en) | 1996-01-22 | 1997-01-21 | Ink-jet image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4783496A JP3278344B2 (en) | 1996-03-05 | 1996-03-05 | Ink jet type image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09239967A true JPH09239967A (en) | 1997-09-16 |
| JP3278344B2 JP3278344B2 (en) | 2002-04-30 |
Family
ID=12786398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4783496A Expired - Lifetime JP3278344B2 (en) | 1996-01-22 | 1996-03-05 | Ink jet type image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3278344B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012148575A (en) * | 2012-05-14 | 2012-08-09 | Brother Industries Ltd | Inkjet recording device |
-
1996
- 1996-03-05 JP JP4783496A patent/JP3278344B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012148575A (en) * | 2012-05-14 | 2012-08-09 | Brother Industries Ltd | Inkjet recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3278344B2 (en) | 2002-04-30 |
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