JPH09123435A - Print head for ink jet recorder - Google Patents
Print head for ink jet recorderInfo
- Publication number
- JPH09123435A JPH09123435A JP28702795A JP28702795A JPH09123435A JP H09123435 A JPH09123435 A JP H09123435A JP 28702795 A JP28702795 A JP 28702795A JP 28702795 A JP28702795 A JP 28702795A JP H09123435 A JPH09123435 A JP H09123435A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- print head
- printing
- ink jet
- 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
Landscapes
- Ink Jet (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はセンサを用いて印字
開始タイミングを検出する、インクジェット記録装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus which detects a print start timing by using a sensor.
【０００２】[0002]
【従来の技術】インクジェット記録装置（以下、省略し
てＩＪＰと呼ぶことにする。）とは、文字の一部となる
インク粒子を偏向、もしくは移動方向に対し、垂直に並
べたノズル群を開閉することにより、インクを噴出させ
て移動体に印字する装置である。よって、物体に印字す
るには、物体と印字ヘッドを、相対移動させる必要があ
る。その一つの方法は、印字ヘッドを固定し物体を移動
させる方法である。もう一つの方法は、物体を固定し印
字ヘッドを移動させる方法である。前者の方法におい
て、物体は移動しているため、印字開始タイミングをＩ
ＪＰが認識することが必要である。2. Description of the Related Art An ink jet recording apparatus (hereinafter, abbreviated as IJP) is used to open and close a nozzle group in which ink particles forming a part of a character are deflected or arranged perpendicularly to a moving direction. By doing so, the device ejects ink to print on the moving body. Therefore, in order to print on the object, it is necessary to move the object and the print head relatively. One method is to fix the print head and move the object. The other method is to fix the object and move the print head. In the former method, since the object is moving, the print start timing is I
It is necessary for the JP to recognize.
【０００３】この印字開始タイミングを検出する手段
は、特公昭55−13069 号公報に示されるように、光源と
受光機を搬送機上に挾んで対向させておき、物体がこの
光路を遮断したことを検出する方法が知られている。As shown in Japanese Patent Publication No. 55-13069, the means for detecting the print start timing is such that the light source and the light receiver are sandwiched on the carrier so as to be opposed to each other, and the object interrupts this optical path. There are known methods for detecting.
【０００４】さらに、その他の手段として、光電センサ
を用いる方法がある。光電センサとは、投光部から出さ
れた信号光が物体によって反射，透過，吸収等の変化を
受けたことを受光部で検知し出力信号を得るものであ
る。Furthermore, as another means, there is a method using a photoelectric sensor. The photoelectric sensor is a sensor for detecting that the signal light emitted from the light projecting portion has undergone a change in reflection, transmission, absorption, etc. by an object, and obtains an output signal.
【０００５】光電センサはその検出形態により透過型，
反射型に分類される。図５によりその違いを説明する。
（イ）は透過型光電センサを表す。透過型光電センサは
対向する投光部１６，受光部１７間の光路を物体５が遮
ることにより検出するものである。（ロ）は反射型光電
センサを表す。反射型光電センサは物体５にセンサ４か
らの光を照射し物体からの反射光を受光して検出する方
法である。The photoelectric sensor is a transmissive type, depending on its detection form.
It is classified as a reflective type. The difference will be described with reference to FIG.
(A) represents a transmissive photoelectric sensor. The transmissive photoelectric sensor detects an optical path between the light projecting portion 16 and the light receiving portion 17 which face each other by the object 5 blocking the light path. (B) represents a reflective photoelectric sensor. The reflective photoelectric sensor is a method in which the light from the sensor 4 is applied to the object 5 and the reflected light from the object is received and detected.
【０００６】透過型は反射型に比べ、検出精度は高い
が、透明体を検出できない、配線工事が割高になる等の
短所がある。それに対し、反射型は投光部と受光部が一
体であるため、透過型に必要な光軸合わせが不要で、さ
らに反射物体であれば透明体でも検出できる、設置スペ
ースが小さくてすむ等の長所がある。The transmissive type has a higher detection accuracy than the reflective type, but has the disadvantages that the transparent body cannot be detected and the wiring work is expensive. On the other hand, the reflective type does not require the optical axis alignment required for the transmissive type because the light projecting unit and the light receiving unit are integrated, and a transparent object can be detected as long as it is a reflective object, and the installation space is small. There are advantages.
【０００７】一方、他品種少量生産の工場では、省コス
トのため複数ラインで１台のＩＪＰを使用する場合があ
る。その場合は取付け性，調整の容易さより反射型を使
う場合が多い。On the other hand, in a factory for small-volume production of other products, one IJP may be used in a plurality of lines for cost saving. In that case, a reflective type is often used because of its ease of installation and adjustment.
【０００８】[0008]
【発明が解決しようとする課題】前述のような他品種少
量生産の工場では、反射型光電センサ（以下、省略して
センサと呼ぶことにする。）をＩＪＰの移動の度ごとに
取外し、取り付ける手間がいる。あるいは、移動先のラ
インすべてにセンサを取り付けておく必要がある。In the factory for small-volume production of other types as described above, the reflection type photoelectric sensor (hereinafter, abbreviated as a sensor) is removed and attached every time the IJP is moved. It takes time. Alternatively, it is necessary to attach a sensor to all the lines to which it is moved.
【０００９】一方、移動する物体に印字するとき、印字
の開始位置は搬送機の速度変動により変わる。これを図
６を用いて説明する。図６は搬送機の速度変動による印
字位置のばらつきを説明する概念図である。図６の構成
について説明するとスタンド７ａに支えられた印字ヘッ
ド３がケーブル２によってＩＪＰ本体１と接続されてい
る。また同じようにスタンド７ｂに支えられているセン
サ４はＩＪＰ本体１と接続されている。今、物体５が搬
送機６上を速度Ｖ１で動いているとする。またセンサ４
と印字ヘッド３との距離をＬとする。物体５の位置を検
出し印字ヘッド５の下部にくるまでの時間をＴ1 とすれ
ば次の数１になる。On the other hand, when printing on a moving object, the printing start position changes depending on the speed fluctuation of the carrier. This will be described with reference to FIG. FIG. 6 is a conceptual diagram for explaining the variation in the print position due to the speed variation of the transport machine. The structure of FIG. 6 will be described. The print head 3 supported by the stand 7a is connected to the IJP body 1 by the cable 2. Similarly, the sensor 4 supported by the stand 7b is connected to the IJP body 1. It is now assumed that the object 5 is moving on the carrier 6 at a speed V1. Also sensor 4
The distance between the print head 3 and the print head 3 is L. When the time required to detect the position of the object 5 and reach the bottom of the print head 5 is T 1 , the following formula 1 is obtained.
【００１０】[0010]
【数１】 (Equation 1)
【００１１】次に搬送機の速度Ｖ１がＶ２（Ｖ１＜Ｖ
２）になったとすれば、物体５の位置を検出し印字ヘッ
ド５の下部にくるまでの時間をＴ2 とすると、Ｔ2 は次
の数２になる。Next, the speed V1 of the carrier is V2 (V1 <V
If becomes 2), when the time until the bottom of detecting the position of the object 5 the print head 5 and T 2, T 2 is two following numbers.
【００１２】[0012]
【数２】 (Equation 2)
【００１３】従って、印字ヘッド迄の到達時間のずれＴ
2−Ｔ1は次の数３になる。Therefore, the deviation T of the arrival time to the print head is
2 -T 1 is made to the following equation (3).
【００１４】[0014]
【数３】 (Equation 3)
【００１５】これより、Ｔ2−Ｔ1はセンサ４と印字ヘッ
ド３との距離Ｌに比例することがわかる。すなわち、セ
ンサ４はＬは印字ヘッド３に近づけるほど、ずれが小さ
くなることがわかるが、既設の搬送機に取り付けるとき
には、場所の制約を受けることが多く、容易に印字ヘッ
ドの近くに取り付けることができない場合が多い。From this, it can be seen that T 2 -T 1 is proportional to the distance L between the sensor 4 and the print head 3. That is, it can be understood that the sensor 4 has a smaller displacement as L gets closer to the print head 3. However, when the sensor 4 is attached to an existing transporter, there are many restrictions on the location, and it is easy to attach the sensor 4 near the print head. Often not.
【００１６】[0016]
【課題を解決するための手段】本発明の特長は、印字ヘ
ッドの内部にセンサを内蔵し、検出出力信号をＩＪＰの
印字開始信号の入力端子と接続した点にある。The feature of the present invention resides in that a sensor is built in the print head and the detection output signal is connected to the input terminal of the IJP print start signal.
【００１７】印字ヘッドとセンサが一体になったので、
ＩＪＰの移動に伴うセンサの取付け、調整が不要にな
る。また、印字ヘッド内にセンサを設けることにより、
インクの噴出部とセンサとの距離を近づけることができ
るので、搬送機の速度変動による印字位置のずれが減
る。Since the print head and the sensor are integrated,
There is no need to attach or adjust the sensor as the IJP moves. Also, by providing a sensor in the print head,
Since the distance between the ink ejection portion and the sensor can be reduced, the deviation of the printing position due to the speed fluctuation of the transporting machine is reduced.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施例を図面を用
いて説明する。図１は本発明の内容を最も良く表してい
る構成図、図２は制御ブロック図、図３は本発明のセン
サを内蔵した帯電制御型ＩＪＰの印字ヘッドの側面図、
図４は本発明のセンサを内蔵したドロップオンデマンド
型ＩＪＰの印字ヘッドの側面図を示す。以下、本発明を
図を用いて詳細に説明する。図１は本発明の構成を表し
たもので、１はＩＪＰ本体、２は本体と印字ヘッドを接
続するケーブル、３は印字ヘッド、４はセンサ、５は印
字される物体、６は物体５を移動させる搬送機である。
７は印字ヘッド３を支えるスタンドである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram best showing the contents of the present invention, FIG. 2 is a control block diagram, and FIG. 3 is a side view of a charge control type IJP print head incorporating the sensor of the present invention.
FIG. 4 shows a side view of a drop-on-demand type IJP print head incorporating the sensor of the present invention. Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of the present invention. 1 is an IJP main body, 2 is a cable connecting the main body and a print head, 3 is a print head, 4 is a sensor, 5 is an object to be printed, and 6 is an object 5. It is a carrier to move.
A stand 7 supports the print head 3.
【００１９】次に、図２は本発明の動作を表す制御ブロ
ック図を示す。９はＩＪＰ内部の制御部でセンサの出力
信号の入力、印字信号発生部８の制御を行う。１０は印
字ヘッド内部の印字部で印字信号発生部の出力により、
インク粒子を制御し印字を行う。次に諸動作について説
明する。搬送機６を動く物体５がＡの位置にきたとき、
センサ４から照射された光が、物体５に反射すると、セ
ンサ４は制御部９に検出信号を送る。信号を受け取った
制御部９は、印字信号発生部８に印字信号を発生させ
る。印字信号により印字部１０は制御され物体５がＢの
位置にきたとき印字する。FIG. 2 is a control block diagram showing the operation of the present invention. Reference numeral 9 denotes a control unit inside the IJP, which inputs an output signal of the sensor and controls the print signal generation unit 8. Reference numeral 10 is a print unit inside the print head.
Controls ink particles and prints. Next, various operations will be described. When the object 5 moving the carrier 6 comes to the position A,
When the light emitted from the sensor 4 is reflected by the object 5, the sensor 4 sends a detection signal to the control unit 9. Upon receiving the signal, the controller 9 causes the print signal generator 8 to generate a print signal. The printing unit 10 is controlled by the print signal and prints when the object 5 reaches the position B.
【００２０】本発明になるセンサ内蔵型印字ヘッドによ
れば、印字ヘッド３に内蔵されたセンサ４により、ＩＪ
Ｐの移動に伴うセンサ４の取付けが必要ないことがわか
る。また、図２より、センサ４の検出位置Ａとを印字ヘ
ッド３の印字位置Ｂは、外付けに比べると短くなるた
め、搬送機の速度変動による印字位置のばらつきが減少
する。最後に本発明のＩＪＰの印字ヘッドへの実施例を
示す。図３は帯電制御型ＩＪＰの印字ヘッドの実施例を
示す。図３の構成について説明すると、１１はインク粒
子を発生させるノズル、１２はインク粒子に印字信号を
与える帯電電極、１３は帯電したインク粒子に広がりを
与える偏向電極、１４は印字に必要としないインク粒子
を回収するガターである。これらは全て印字ヘッド３の
内部で構成されているが、本発明の特長はその内部に、
センサ４を内蔵したことにある。また図４は、ドロップ
オンデマンド型ＩＪＰの印字ヘッドの実施例を示す。図
４の構成について説明すると、インクを必要なときにだ
け開くバルブ１５が印字ヘッド３の内部に並んでいる。
バルブ１５の数については、必要な印字ドットの縦数分
必要な数を設置すればよい。本発明は、産業用のＩＪＰ
であれば全てに適用が可能である。According to the print head with a built-in sensor according to the present invention, the sensor 4 built in the print head 3 allows the IJ
It can be seen that the sensor 4 need not be attached when P moves. Further, as shown in FIG. 2, the detection position A of the sensor 4 and the printing position B of the print head 3 are shorter than those of the external mounting, so that the variation of the printing position due to the speed fluctuation of the transporting machine is reduced. Finally, an example of the IJP print head of the present invention will be described. FIG. 3 shows an embodiment of a charge control type IJP print head. The structure of FIG. 3 will be described. 11 is a nozzle that generates ink particles, 12 is a charging electrode that gives a printing signal to the ink particles, 13 is a deflection electrode that spreads the charged ink particles, and 14 is an ink not necessary for printing. It is a gutter that collects particles. These are all configured inside the print head 3, but the features of the present invention are
The sensor 4 is built in. FIG. 4 shows an embodiment of the drop-on-demand type IJP print head. Explaining the configuration of FIG. 4, valves 15 that open ink only when necessary are arranged inside the print head 3.
As for the number of valves 15, the required number of print dots may be set in the vertical direction. The present invention is an industrial IJP
If so, it can be applied to all.
【００２１】[0021]
【発明の効果】印字ヘッドにセンサを内蔵することで、
ＩＪＰの移動に伴う取外し取付けがいらないので、ＩＪ
Ｐの移動が容易に行うことができ、他品種少量生産の工
場でも容易に対応できる。By incorporating a sensor in the print head,
Since there is no need to remove and install the IJP as it moves, IJ
P can be easily moved, and it is possible to easily cope with small-lot production of other products.
【００２２】また、印字ヘッドとセンサの距離を短く構
成したので、搬送機の速度変動による印字位置のばらつ
きを容易に減少することができる。Further, since the distance between the print head and the sensor is short, it is possible to easily reduce the variation in the print position due to the speed variation of the transporting machine.
【図１】本発明内容の全体の説明図。FIG. 1 is an overall explanatory view of the contents of the present invention.
【図２】本発明の動作内容を表す制御のブロック図。FIG. 2 is a block diagram of control showing the operation content of the present invention.
【図３】本発明のセンサを内蔵した帯電制御型ＩＪＰの
印字ヘッドの側面図。FIG. 3 is a side view of a charge control type IJP print head including the sensor of the present invention.
【図４】本発明のセンサを内蔵したドロップオンデマン
ド型ＩＪＰの印字ヘッドの側面図。FIG. 4 is a side view of a drop-on-demand IJP print head including the sensor of the present invention.
【図５】光電センサの検出形態による違いの説明図。FIG. 5 is an explanatory diagram of a difference according to a detection mode of a photoelectric sensor.
【図６】搬送機の速度変動による印字位置のばらつきの
説明図。FIG. 6 is an explanatory diagram of variations in printing position due to speed variations of the transport device.
１…ＩＪＰ本体、２…ケーブル、３…印字ヘッド、４…
センサ、５…物体、６…搬送機、７…スタンド、８…印
字信号発生部、９…制御部、１０…印字部、１１…ノズ
ル、１２…帯電電極、１３…偏向電極、１４…ガター、
１５…バルブ、１６…投光部、１７…受光部。1 ... IJP body, 2 ... Cable, 3 ... Print head, 4 ...
Sensor, 5 ... Object, 6 ... Conveyor, 7 ... Stand, 8 ... Print signal generating section, 9 ... Control section, 10 ... Printing section, 11 ... Nozzle, 12 ... Charging electrode, 13 ... Deflection electrode, 14 ... Gutter,
15 ... Bulb, 16 ... Emitter, 17 ... Light receiver.
Claims (1)
る入力端子を備え、前記センサを前記入力端子と接続
し、搬送機上を動く物体の位置を前記センサで検出し、
前記物体にインクを噴出することにより印字を行うイン
クジェット記録装置において、前記印字ヘッドに前記セ
ンサを内蔵したことを特徴とするインクジェット記録装
置の印字ヘッド。1. An input terminal that uses an output signal from a sensor as a print start signal, the sensor is connected to the input terminal, and the position of an object moving on a conveyor is detected by the sensor.
An inkjet recording apparatus that performs printing by ejecting ink onto the object, wherein the sensor is built in the print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28702795A JPH09123435A (en) | 1995-11-06 | 1995-11-06 | Print head for ink jet recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28702795A JPH09123435A (en) | 1995-11-06 | 1995-11-06 | Print head for ink jet recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09123435A true JPH09123435A (en) | 1997-05-13 |
Family
ID=17712101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28702795A Pending JPH09123435A (en) | 1995-11-06 | 1995-11-06 | Print head for ink jet recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09123435A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1990204A1 (en) * | 2007-05-10 | 2008-11-12 | Homag Holzbearbeitungssysteme AG | Process and device for coating a surface |
| WO2009149163A3 (en) * | 2008-06-06 | 2010-03-18 | Fujifilm Dimatix, Inc. | Sensing objects for printing |
| JP2012144264A (en) * | 2011-01-07 | 2012-08-02 | N Tech:Kk | Printing device and printing method |
| JP2012221713A (en) * | 2011-04-07 | 2012-11-12 | Kyoto Seisakusho Co Ltd | Electrode position detector and electrode position detection method |
| US9876256B2 (en) | 2011-04-07 | 2018-01-23 | Nissan Motor Co., Ltd. | Electrode stacking device and electrode stacking method |
-
1995
- 1995-11-06 JP JP28702795A patent/JPH09123435A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1990204A1 (en) * | 2007-05-10 | 2008-11-12 | Homag Holzbearbeitungssysteme AG | Process and device for coating a surface |
| WO2009149163A3 (en) * | 2008-06-06 | 2010-03-18 | Fujifilm Dimatix, Inc. | Sensing objects for printing |
| US8025354B2 (en) | 2008-06-06 | 2011-09-27 | Fujifilm Dimatix, Inc. | Sensing objects for printing |
| JP2012144264A (en) * | 2011-01-07 | 2012-08-02 | N Tech:Kk | Printing device and printing method |
| JP2012221713A (en) * | 2011-04-07 | 2012-11-12 | Kyoto Seisakusho Co Ltd | Electrode position detector and electrode position detection method |
| US9876256B2 (en) | 2011-04-07 | 2018-01-23 | Nissan Motor Co., Ltd. | Electrode stacking device and electrode stacking method |
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