JP2000263768A - Ink jet printer - Google Patents
Ink jet printerInfo
- Publication number
- JP2000263768A JP2000263768A JP6711099A JP6711099A JP2000263768A JP 2000263768 A JP2000263768 A JP 2000263768A JP 6711099 A JP6711099 A JP 6711099A JP 6711099 A JP6711099 A JP 6711099A JP 2000263768 A JP2000263768 A JP 2000263768A
- Authority
- JP
- Japan
- Prior art keywords
- head
- frame
- print head
- thermal expansion
- 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
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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/20—Modules
Landscapes
- Ink Jet (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Common Mechanisms (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はインクジェットプリ
ンタに関し、さらに詳しくは温度変化による熱膨張収縮
に伴う熱ひずみを発生しないような印字ヘッドの装着に
関するものであり、特に複数の印字ヘッドを取り付けす
る場合に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink-jet printer, and more particularly to a method for mounting a print head which does not generate thermal distortion due to thermal expansion and contraction due to a temperature change. About.
【０００２】[0002]
【従来の技術】インクジェットプリンタの印刷は、印字
ヘッドのノズルからインク滴を吐出させ、これを用紙等
の媒体に付着させることで行う。この方式のプリンタに
おいては、印字速度向上および印字品質向上のニーズに
応えるため、この印字ヘッドに対して、より高密度でよ
り多くのノズルを持たせる方向にある。更には、複数の
印字ヘッドを持たせることで、より高速化を図ることも
進められている。2. Description of the Related Art Printing by an ink jet printer is performed by ejecting ink droplets from nozzles of a print head and attaching the ink droplets to a medium such as paper. In the printer of this type, in order to meet the needs for improving the printing speed and the printing quality, there is a tendency that the printing head has a higher density and more nozzles. Further, by providing a plurality of print heads, further speeding up has been promoted.
【０００３】その最も特徴的な形としては、図１に示す
ように複数個の印字ヘッド１０を連続的に配設し、印字
幅全域に渡ってノズル１１を配したものであって、図示
左右方向に製品仕様で規定されたドット密度でノズル１
１を配設した構成である。The most characteristic form is that a plurality of print heads 10 are continuously arranged as shown in FIG. 1 and nozzles 11 are arranged over the entire printing width. Nozzle 1 at the dot density specified in the product specification in the direction
1 is provided.
【０００４】例えば、印刷幅が１２インチでドット密度
が３００ｄｐｉ（dot／inch）であれば、そのノズル数
は３６００個になる。この例において、印字ヘッド１０
は４個であるから、各印字ヘッド１０の印字範囲は、１
２／４＝３インチとなっている。For example, if the printing width is 12 inches and the dot density is 300 dpi (dot / inch), the number of nozzles is 3600. In this example, the print head 10
Is four, the printing range of each print head 10 is 1
2/4 = 3 inches.
【０００５】更に、各印字ヘッド１０は印字ヘッド１０
取り付け用のヘッドフレーム２０を介して、メカフレー
ム３０に取り付けてあり、図示していないプリンタ本体
に組み込まれている。Further, each print head 10 is a print head 10
It is mounted on a mechanical frame 30 via a mounting head frame 20, and is incorporated in a printer body (not shown).
【０００６】[0006]
【発明が解決しようとする課題】上述したプリンタは、
使用される環境温度範囲と内部の温度上昇から、印字ヘ
ッド１０周辺は３０ｄｅｇ程度の温度変化を受ける。印
字ヘッド１０を構成する主材料は色々とあるが、熱膨張
係数が１×１０-4／ｄｅｇの樹脂を主材料として構成す
ると、温度変化３０ｄｅｇによる熱膨張収縮量は、３イ
ンチ×１×１０-4×３０ｄｅｇ≒０．２３ｍｍになる。The printer described above is
The temperature around the print head 10 undergoes a temperature change of about 30 deg due to the environmental temperature range used and the rise in internal temperature. Although there are various main materials constituting the print head 10, when a resin having a thermal expansion coefficient of 1 × 10 −4 / deg is used as a main material, the amount of thermal expansion and contraction due to a temperature change of 30 deg is 3 inches × 1 × 10 -4 × 30 deg ≒ 0.23 mm.
【０００７】一方、ヘッドフレーム２０又はメカフレー
ム３０を熱膨張係数が２．３×１０ -5／ｄｅｇのアルミ
材で構成すると、印字ヘッド１０の一つの範囲でその熱
膨張収縮量は、３インチ×２．３×１０-5×３０ｄｅｇ
≒０．５３ｍｍとなる。On the other hand, the head frame 20 or the mechanical frame
30 has a coefficient of thermal expansion of 2.3 × 10 -Five/ Deg aluminum
When the print head 10 is made of a material,
The amount of expansion and contraction is 3 inches x 2.3 x 10-Five× 30 deg
≒ 0.53 mm.
【０００８】印字ヘッド１０とヘッドフレーム２０又は
メカフレーム３０の熱膨張収縮量が上述のように異なる
と、両者間に熱ひずみが発生して印字ヘッド１０の特性
や印字品質に大きな影響を与える。When the thermal expansion and contraction amounts of the print head 10 and the head frame 20 or the mechanical frame 30 are different as described above, thermal distortion occurs between the two, which greatly affects the characteristics and print quality of the print head 10.
【０００９】そこで、本発明においては、熱ひずみの発
生しないような印字ヘッドの組み込み構成体として、印
字ヘッドの特性変化および印字品質低下を防止すること
を課題とする。In view of the above, an object of the present invention is to prevent a change in characteristics of a print head and a decrease in print quality as a built-in structure of a print head which does not generate thermal distortion.
【００１０】[0010]
【課題を解決するための手段】印字ヘッドをヘッドフレ
ームを介してメカフレームに取り付けるにあたっては、
温度変化に伴う相対的な熱膨張収縮を無くすか又は逃が
せばよい。In mounting the print head on the mechanical frame via the head frame,
The relative thermal expansion and contraction caused by the temperature change may be eliminated or eliminated.
【００１１】そこで、上記課題を解決する本発明の第一
の構成では、インク滴吐出用ノズルを連続的に配設した
印字ヘッドと、少なくとも２つ以上の前記印字ヘッドを
配設するためのヘッドフレームと、該ヘッドフレームを
介して前記印字ヘッドを搭載するためのメカフレームと
を有したインクジェットプリンタにおいて、前記印字ヘ
ッドは温度変化に対する熱膨張収縮を略決定する主構成
材を含み、該主構成材の熱膨張係数とほぼ同じ熱膨張係
数の材質で前記ヘッドフレームを形成するようにした。Therefore, according to a first configuration of the present invention for solving the above-mentioned problems, a print head in which ink droplet ejection nozzles are continuously arranged, and a head for arranging at least two or more print heads are provided. In an ink jet printer having a frame and a mechanical frame for mounting the print head via the head frame, the print head includes a main component that substantially determines thermal expansion and contraction with respect to a temperature change. The head frame is made of a material having a thermal expansion coefficient substantially equal to that of the material.
【００１２】第二の構成（第一の構成において特に効果
を発揮するケース）は、前記印字ヘッドの温度変化に対
する熱膨張収縮を略決定する主構成材が樹脂とすること
にある。A second configuration (a case that is particularly effective in the first configuration) is that the main component that substantially determines the thermal expansion and contraction with respect to the temperature change of the print head is a resin.
【００１３】上記課題を解決する本発明の第三の構成と
しては、インク滴吐出用ノズルを連続的に配設した印字
ヘッドと、少なくとも２つ以上の前記印字ヘッドを長手
方向に配設するためのヘッドフレームと、該ヘッドフレ
ームを介して前記印字ヘッドを搭載するためのメカフレ
ームとを有したインクジェットプリンタにおいて、前記
ヘッドフレームは前記メカフレームに対して一端は固定
取り付けとし、他端は長手方向に位置調整が可能となる
よう自由取り付けとしたことにある。According to a third aspect of the present invention, there is provided a print head in which ink droplet ejection nozzles are continuously arranged, and at least two or more of the print heads are arranged in a longitudinal direction. An ink jet printer having a head frame and a mechanical frame for mounting the print head via the head frame, wherein the head frame has one end fixedly attached to the mechanical frame and the other end in the longitudinal direction. In that it can be freely mounted so that the position can be adjusted.
【００１４】上記課題を解決する本発明の第四の構成と
しては、第三の構成に加え、前記印字ヘッドを配設した
前記ヘッドフレームは、前記長手方向と垂直方向に複数
個配列するように前記メカフレームに装着され、かつ前
記ヘッドフレームの夫々の固定取り付け側を同一側にし
たことにある。According to a fourth aspect of the present invention for solving the above-mentioned problems, in addition to the third aspect, a plurality of the head frames provided with the print heads are arranged in a direction perpendicular to the longitudinal direction. The head frame is mounted on the mechanical frame, and the fixed mounting side of the head frame is the same side.
【００１５】上記課題を解決する本発明の第五の構成
は、インク滴吐出用ノズルを連続的に配設した印字ヘッ
ドと、少なくとも２つ以上の前記印字ヘッドを長手方向
に配設するためのヘッドフレームと、該ヘッドフレーム
を介して前記印字ヘッドを搭載するためのメカフレーム
とを有するインクジェットプリンタにおいて、前記印字
ヘッドの一端を前記ヘッドフレームに固定取り付けにす
ると共に、他端は長手方向に位置調整ができるように自
由支持取り付けとし、かつ前記印字ヘッドの固定取り付
け側が同士が互いに隣接するように配置したことにあ
る。According to a fifth aspect of the present invention, there is provided a print head in which ink droplet ejection nozzles are continuously arranged, and at least two or more of the print heads are arranged in a longitudinal direction. In an ink jet printer having a head frame and a mechanical frame for mounting the print head via the head frame, one end of the print head is fixedly attached to the head frame, and the other end is positioned in the longitudinal direction. The print head is mounted so as to be freely supported so as to be adjustable, and the fixed mounting sides of the print head are arranged so that they are adjacent to each other.
【００１６】[0016]
【発明の実施の形態】以下、本発明の第一の構成につい
て図１を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.
【００１７】多数のインク滴吐出用ノズル１１を有する
印字ヘッド１０は、その両端をヘッドフレーム２０にネ
ジ１２で取り付けてある。これら印字ヘッド１０は印字
幅全域に渡って連続的に５個搭載してある。A print head 10 having a number of nozzles 11 for ejecting ink droplets has both ends attached to a head frame 20 with screws 12. These five print heads 10 are mounted continuously over the entire printing width.
【００１８】ヘッドフレーム２０は、その両端でネジ２
１によってメカフレーム３０に取り付けてある。The head frame 20 has screws 2 at both ends thereof.
1 attached to the mechanical frame 30.
【００１９】メカフレーム３０の下側には、所定ギャッ
プを隔てて印字用紙４０が図示上方向に搬送されるよう
に配置される。The printing paper 40 is disposed below the mechanical frame 30 so as to be conveyed upward in the drawing with a predetermined gap therebetween.
【００２０】印字は、各ノズル１１のインク滴吐出と印
字用紙４０の搬送によって、ドットマトリックス状に行
う。Printing is performed in a dot matrix by ejecting ink droplets from each nozzle 11 and transporting the printing paper 40.
【００２１】上記構成において、印字ヘッド１０の熱膨
張収縮を代表する主構成材の熱膨張係数に合わせるよう
にヘッドフレーム２０およびメカフレーム３０を構成す
る材質を決める。In the above configuration, the materials constituting the head frame 20 and the mechanical frame 30 are determined so as to match the thermal expansion coefficient of the main constituent material representing the thermal expansion and contraction of the print head 10.
【００２２】具体的には、印字ヘッド１０の主構成材が
樹脂の場合はヘッドフレーム２０とメカフレーム３０の
材質はほぼ同じ熱膨張係数を有する樹脂から選択して用
いる。同様に、ステンレス材の場合はステンレス材を用
いる。More specifically, when the main component of the print head 10 is a resin, the head frame 20 and the mechanical frame 30 are selected from resins having substantially the same thermal expansion coefficient. Similarly, in the case of a stainless material, a stainless material is used.
【００２３】第二の構成として、特に上記第一の構成に
おいて、印字ヘッド１０の主構成材が樹脂の場合は、そ
の熱膨張係数が高く熱膨張収縮量が大きくなるので、ヘ
ッドフレーム２０とメカフレーム３０を樹脂で構成する
ことが不可欠である。As a second configuration, particularly in the first configuration, when the main component of the print head 10 is a resin, the thermal expansion coefficient is high and the thermal expansion and contraction amount is large. It is essential that the frame 30 be made of resin.
【００２４】次に、本発明の第三の構成について、図２
を参照して説明する。Next, a third configuration of the present invention will be described with reference to FIG.
This will be described with reference to FIG.
【００２５】本例は、ヘッドフレーム２０とメカフレー
ム３０について、熱膨張係数がほぼ同じにできない場合
の熱ひずみを防止する構成である。The present embodiment is configured to prevent thermal distortion when the thermal expansion coefficients of the head frame 20 and the mechanical frame 30 cannot be substantially the same.
【００２６】図２において、印字ヘッド１０の主構成材
とヘッドフレーム２０はほぼ同じ熱膨張係数の材質とな
っている。これに対して、メカフレーム３０の熱膨張係
数は異なっている。この熱膨張収縮量の差を逃がすため
に、ヘッドフレーム２０はその一端をメカフレーム３０
に固定取り付けとし、その他端をスプリング２２を介し
てネジ２１で自由取り付けとしている。In FIG. 2, the main components of the print head 10 and the head frame 20 are made of a material having substantially the same thermal expansion coefficient. On the other hand, the thermal expansion coefficient of the mechanical frame 30 is different. To escape this difference in the amount of thermal expansion and contraction, the head frame 20 has one end connected to the mechanical frame 30.
And the other end is freely attached with a screw 21 via a spring 22.
【００２７】次に、第四の構成について、図３を参照し
て説明する。Next, a fourth configuration will be described with reference to FIG.
【００２８】本例は、図１の構成の印字ヘッド１０を取
り付けたヘッドフレーム２０複数個をメカフレーム５０
に取り付ける構成を示している。In this embodiment, a plurality of head frames 20 to which the print head 10 having the structure shown in FIG.
1 shows a configuration to be attached.
【００２９】複数のヘッドフレーム２０をメカフレーム
５０に取り付ける場合は、印字品質を低下させないため
に、熱膨張収縮に伴う各ヘッドフレーム２０間の相対的
なずれを防止する必要がある。そこで、各ヘッドフレー
ム２０の同一側の一端をメカフレーム５０に対して固定
取り付けとし、その他端を自由取り付けとしている。When a plurality of head frames 20 are mounted on the mechanical frame 50, it is necessary to prevent relative displacement between the head frames 20 due to thermal expansion and contraction so as not to deteriorate the printing quality. Therefore, one end of each head frame 20 on the same side is fixedly attached to the mechanical frame 50, and the other end is freely attached.
【００３０】最後に、第五の構成について、図４、図５
を参照して説明する。Finally, regarding the fifth configuration, FIGS.
This will be described with reference to FIG.
【００３１】この例は、印字ヘッド１０のノズル１１の
数をより多くした場合の熱膨張収縮を防止するのに必要
となる方法である。印字ヘッド６０はその一端をネジ１
２でヘッドフレーム２０に固定取り付けしてある。その
他端は、スプリング１３を介してネジ１２で自由支持取
り付けとしている。同様に、連続的に配設される隣の印
字ヘッド６０も一端は固定取り付けで、他端は自由支持
取り付けとしている。そして、各印字ヘッド６０の隣接
する側を固定取り付けとしている。これは、ヘッドフレ
ーム２０に対する熱ひずみを無くすためと、隣接する印
字ヘッド６０の相対的な位置ずれを防止するためであ
る。This example is a method necessary for preventing thermal expansion and contraction when the number of nozzles 11 of the print head 10 is increased. The print head 60 has a screw 1 at one end.
2 is fixedly attached to the head frame 20. The other end is freely mounted by screws 12 via a spring 13. Similarly, the adjacent print heads 60 that are continuously arranged have one end fixedly mounted and the other end freely mounted. The adjacent side of each print head 60 is fixedly attached. This is to eliminate thermal strain on the head frame 20 and to prevent relative displacement of the adjacent print heads 60.
【００３２】なお、当然であるが、ノズル１１の数が少
ない場合においても上記方法は有効である。Note that the above method is effective even when the number of nozzles 11 is small.
【００３３】[0033]
【発明の効果】本発明により、各構成部品相互の熱膨張
収縮量をほぼ同一にするか、又は熱膨張収縮を逃がす構
成にしたので、熱ひずみの発生しないような印字ヘッド
の組み込み構成体にすることができ、これによって印字
ヘッドの特性変化および印字品質低下を防止することが
できる。According to the present invention, since the thermal expansion and contraction amounts of the respective components are made substantially the same or the thermal expansion and contraction are released, the present invention can be applied to a print head built-in structure which does not generate thermal distortion. Accordingly, it is possible to prevent a change in the characteristics of the print head and a decrease in print quality.
【図１】 本発明の第一の構成を示す印字ヘッド周辺の
正面図である。FIG. 1 is a front view of the vicinity of a print head showing a first configuration of the present invention.
【図２】 本発明の第三の構成を示す印字ヘッド周辺の
断面図であるFIG. 2 is a cross-sectional view around a print head showing a third configuration of the present invention.
【図３】 本発明の第四の構成を示す印字ヘッド周辺の
正面図である。FIG. 3 is a front view of the periphery of a print head showing a fourth configuration of the present invention.
【図４】 本発明の第五の構成を示す印字ヘッド周辺の
正面図である。FIG. 4 is a front view of the vicinity of a print head showing a fifth configuration of the present invention.
【図５】 図４の断面図である。FIG. 5 is a sectional view of FIG.
図において、１０、６０は印字ヘッド、１１はノズル、
１２、１３、２２はスプリング、２０はヘッドフレー
ム、２１はネジ、３０、５０はメカフレーム、４０は印
字用紙である。In the figure, 10 and 60 are print heads, 11 is nozzles,
12, 13, 22 are springs, 20 is a head frame, 21 is a screw, 30, 50 is a mechanical frame, and 40 is a printing paper.
Claims (5)
印字ヘッドと、少なくとも２つ以上の前記印字ヘッドを
配設するためのヘッドフレームと、該ヘッドフレームを
介して前記印字ヘッドを搭載するためのメカフレームと
を有したインクジェットプリンタにおいて、 前記印字ヘッドは温度変化に対する熱膨張収縮を略決定
する主構成材を含み、該主構成材の熱膨張係数とほぼ同
じ熱膨張係数の材質で前記ヘッドフレームを形成するこ
とを特徴とするインクジェットプリンタ。1. A print head in which ink droplet ejection nozzles are continuously arranged, a head frame in which at least two or more print heads are arranged, and the print head mounted via the head frame. The print head includes a main component that substantially determines the thermal expansion and contraction with respect to temperature change, and is made of a material having a thermal expansion coefficient substantially equal to the thermal expansion coefficient of the main component. An ink jet printer, wherein the head frame is formed.
収縮を略決定する主構成材が樹脂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プリンタ。2. The ink jet printer according to claim 1, wherein a main constituent material for substantially determining the thermal expansion and contraction with respect to a temperature change of the print head is a resin.
印字ヘッドと、少なくとも２つ以上の前記印字ヘッドを
長手方向に配設するためのヘッドフレームと、該ヘッド
フレームを介して前記印字ヘッドを搭載するためのメカ
フレームとを有したインクジェットプリンタにおいて、 前記ヘッドフレームは前記メカフレームに対して一端は
固定取り付けとし、他端は長手方向に位置調整が可能と
なるよう自由取り付けとしたことを特徴とするインクジ
ェットプリンタ。3. A print head in which nozzles for ejecting ink droplets are continuously arranged, a head frame in which at least two or more print heads are arranged in a longitudinal direction, and the printing through the head frame. An ink jet printer having a mechanical frame for mounting a head, wherein the head frame has one end fixedly attached to the mechanical frame, and the other end freely attached so that position adjustment can be performed in a longitudinal direction. An inkjet printer characterized by the following.
おいて、 前記印字ヘッドを配設した前記ヘッドフレームは、前記
長手方向と垂直方向に複数個配列するように前記メカフ
レームに装着され、かつ前記ヘッドフレームの夫々の固
定取り付け側を同一側にしたことを特徴とするインクジ
ェットプリンタ。4. The ink-jet printer according to claim 3, wherein said head frame provided with said print head is mounted on said mechanical frame such that a plurality of said head frames are arranged in a direction perpendicular to said longitudinal direction. An ink-jet printer, wherein the fixed mounting sides are the same.
印字ヘッドと、少なくとも２つ以上の前記印字ヘッドを
長手方向に配設するためのヘッドフレームと、該ヘッド
フレームを介して前記印字ヘッドを搭載するためのメカ
フレームとを有するインクジェットプリンタにおいて、 前記印字ヘッドの一端を前記ヘッドフレームに固定取り
付けにすると共に、他端は長手方向に位置調整ができる
ように自由支持取り付けとし、かつ前記印字ヘッドの固
定取り付け側が同士が互いに隣接するように配置するこ
とを特徴とするインクジェットプリンタ。5. A print head in which nozzles for ejecting ink droplets are continuously arranged, a head frame in which at least two or more print heads are arranged in a longitudinal direction, and the printing through the head frame. An inkjet printer having a mechanical frame for mounting a head, wherein one end of the print head is fixedly attached to the head frame, and the other end is freely supported and attached so that position adjustment can be performed in a longitudinal direction, and An ink jet printer wherein the fixed mounting sides of the print heads are arranged so that they are adjacent to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6711099A JP2000263768A (en) | 1999-03-12 | 1999-03-12 | Ink jet printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6711099A JP2000263768A (en) | 1999-03-12 | 1999-03-12 | Ink jet printer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006048198A Division JP3937443B2 (en) | 2006-02-24 | 2006-02-24 | Inkjet printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000263768A true JP2000263768A (en) | 2000-09-26 |
Family
ID=13335441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6711099A Pending JP2000263768A (en) | 1999-03-12 | 1999-03-12 | Ink jet printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000263768A (en) |
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