JPH0257038B2 - - Google Patents
Info
- Publication number
- JPH0257038B2 JPH0257038B2 JP20594983A JP20594983A JPH0257038B2 JP H0257038 B2 JPH0257038 B2 JP H0257038B2 JP 20594983 A JP20594983 A JP 20594983A JP 20594983 A JP20594983 A JP 20594983A JP H0257038 B2 JPH0257038 B2 JP H0257038B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrometer
- piezoelectric element
- water supply
- concentration
- alcohol
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000654 additive Substances 0.000 claims description 13
- 238000007639 printing Methods 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 19
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development
Landscapes
- Rotary Presses (AREA)
- Printing Plates And Materials Therefor (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、印刷用の給水に対して混入する添加
剤の混入濃度を自動的に制御する装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for automatically controlling the concentration of additives mixed into water supply for printing.
一般に、印刷用の版に対しては、印刷時にイン
キを供給する一方、水分の供給も行なつており、
特にオフセツト印刷では、給水の表面張力を低下
させ、版の汚損を減少する目的上、アルコール等
の添加剤を給水中へ混入するものとなつている。
In general, printing plates are supplied with ink and moisture during printing.
Particularly in offset printing, additives such as alcohol are mixed into the water supply for the purpose of lowering the surface tension of the water supply and reducing staining of the plate.
しかし、添加剤の混入状況は、経験的に調節す
るものとなつており、混入濃度を最適値に保つこ
とが困難であると共に、余剰に添加剤を消費し、
不経済になる等の欠点を生じている。 However, the mixing status of additives is adjusted empirically, and it is difficult to maintain the mixing concentration at the optimum value, and excessive additives are consumed.
This has resulted in disadvantages such as being uneconomical.
本発明は、従来のかゝる欠点を根本的に解決す
る目的を有し、添加剤の混入された給水中へ比重
計を投入のうえ、これの頭部と対向して圧電素子
を設け、比重計の浮上に応ずる押圧によつて生ず
る圧電素子の電気的特性変化を検出し、これによ
つて電動弁を駆動し、この電動弁により添加剤の
混入濃度を制御するものとした極めて効果的な、
印刷用給水の添加剤濃度制御装置を提供するもの
である。
The purpose of the present invention is to fundamentally solve such drawbacks of the conventional methods, and by inserting a hydrometer into feed water mixed with additives, and installing a piezoelectric element opposite the head of the hydrometer, the specific gravity can be measured. This is an extremely effective method that detects changes in the electrical characteristics of the piezoelectric element caused by the pressure applied when the meter floats up, drives an electric valve based on this, and controls the concentration of the additive mixed in. ,
The present invention provides an additive concentration control device for printing water supply.
以下、実施例を示す図によつて本発明の詳細を
説明する。
Hereinafter, details of the present invention will be explained with reference to figures showing examples.
第１図は、印刷機の給水装置を示す構成図であ
り、印刷条件を一定に保つため、所定温度に維持
された水槽１中の給水２は、ポンプＰおよび給水
管３により水舟４および検出槽５へ給送され、水
舟４においては、図上省略した給水ローラにより
版を装着した版胴への水分供給が行なわれ、余剰
分の給水は排水管６を介して水槽１へ還流するも
のとなつており、検出槽５においては、水量調節
用のコツクＶを介して供給された給水２に対し、
アルコール層７から電磁弁SVの開放に応じて供
給されるアルコールが混入され、一定の水位以上
となれば排水管８を介して水槽１へ排出されるも
のとなつている。 FIG. 1 is a block diagram showing the water supply system of a printing press. In order to keep printing conditions constant, water supply 2 in a water tank 1 maintained at a predetermined temperature is supplied to a water tank 4 and a water tank 1 by a pump P and a water supply pipe 3. Water is supplied to the detection tank 5, and in the water tank 4, a water supply roller (not shown in the figure) supplies moisture to the plate cylinder on which the plate is mounted, and excess water is returned to the water tank 1 via the drain pipe 6. In the detection tank 5, for the water supply 2 supplied through the water volume adjustment pot V,
Alcohol supplied from the alcohol layer 7 in response to the opening of the solenoid valve SV is mixed in, and when the water level reaches a certain level or higher, it is discharged to the water tank 1 via the drain pipe 8.
また、検出槽５の給水２中には、排水管８へ固
定されたガイド９により浮沈自在とした支持され
た比重計１０が投入されており、アルコールの混
入濃度が減少すれば浮上し、同濃度が増大すれば
沈下するため、この浮沈動を検出する目的上、比
重計１０の頭部先端と対向して圧電素子Ｘが設け
てあり、これを支持する支持具１１は、検出槽５
へ固定されたアーム１２により上下動自在として
支持され、調節ねじ１３の回転に応じて昇降し、
これによつて、圧電素子Ｘと比重計１０の頭部先
端との対向間隔が調整自在となつている。 In addition, a hydrometer 10 supported by a guide 9 fixed to a drain pipe 8 is inserted into the water supply 2 of the detection tank 5, and when the concentration of alcohol mixed in decreases, it floats to the surface. As the concentration increases, it sinks, so for the purpose of detecting this floating motion, a piezoelectric element X is provided facing the tip of the head of the hydrometer 10.
It is supported in a vertically movable manner by an arm 12 fixed to, and moves up and down according to the rotation of an adjustment screw 13.
Thereby, the distance between the piezoelectric element X and the head end of the hydrometer 10 can be freely adjusted.
なお、支持具１１へ固定された指針１４と、こ
れと対応してアーム１２へ固定された目盛板１５
とが設けてあり、これによつて、アルコールと水
との混合度が100分比により示されるものとなつ
ている。 Note that the pointer 14 is fixed to the support 11 and the scale plate 15 is fixed to the arm 12 correspondingly.
This allows the mixing degree of alcohol and water to be expressed as a 100-part ratio.
また、比重計１０の頭部先端には押圧板１０ａ
が固定され、比重計１０が浮上した際、圧電素子
Ｘの全面を均等に押圧するものとしてある。 Further, a pressing plate 10a is provided at the tip of the head of the hydrometer 10.
is fixed, and when the hydrometer 10 floats, the entire surface of the piezoelectric element X is pressed evenly.
ただし、押圧板１０ａを金属等により製すれ
ば、これの重量に応じて比重計１０の空気室容積
が大容量を要するものとなり、比重計１０が大形
化すると共に、同一の比重変化に対する浮沈動の
幅が大となるため、アルコールの混入濃度変化１
％に対し浮沈動幅が２mm程度となり、検出精度が
向上する。 However, if the press plate 10a is made of metal or the like, the volume of the air chamber of the hydrometer 10 will be large depending on its weight, which will increase the size of the hydrometer 10 and increase the amount of rise and fall for the same change in specific gravity. As the range of movement becomes large, the concentration of alcohol mixed in changes 1.
%, the floating width is approximately 2 mm, improving detection accuracy.
第２図は、圧電素子Ｘとして電歪素子を用いた
場合の制御回路を示すブロツク図であり、発振器
２１により圧電素子Ｘを励振し、これの振動に応
ずる電気的出力を増幅器２２によつて増幅してか
ら検波回路２３によつて直流へ変換のうえ、ゼロ
クロスコンパレータを用いた比較回路２４により
圧電素子Ｘの出力変化を検出し、駆動回路２５を
介して駆動出力を送出し、これによつて電磁弁
SVを駆動している。 FIG. 2 is a block diagram showing a control circuit when an electrostrictive element is used as the piezoelectric element X. An oscillator 21 excites the piezoelectric element After being amplified, it is converted into direct current by a detection circuit 23, and a comparison circuit 24 using a zero-cross comparator detects a change in the output of the piezoelectric element X, and a drive output is sent out via a drive circuit 25. solenoid valve
It drives the SV.
すなわち、比較回路２４は、差動増幅器DA、
入力電圧制限用のダイオードD1，D2、抵抗器R1
〜R4およびポテンシヨメータVRにより構成さ
れ、負電圧−ＥをポテンシヨメータVRにより分
圧したバイアス電圧を差動増幅器DAの反転入力
へ与えており、ポテンシヨメータVRの調整によ
り検出スレシホールドレベルを設定するものとな
つている。 That is, the comparison circuit 24 includes a differential amplifier DA,
Diodes D 1 , D 2 and resistor R 1 for input voltage limitation
~ R4 and a potentiometer VR, the bias voltage obtained by dividing the negative voltage -E by the potentiometer VR is applied to the inverting input of the differential amplifier DA, and the detection threshold is adjusted by adjusting the potentiometer VR. It is used to set the hold level.
したがつて、比重計１０の浮上に応じ、これの
頭部により押圧されて圧電素子Ｘの振動状況が抑
圧され、電気的特性の変化により電気的出力が低
下すれば、これを比較回路２４が検出し、これに
よつて駆動出力が送出され、電磁弁SVが駆動さ
れて開放状態となりアルコールの供給を開始する
ため、これに応じて比重計１０が沈下を行なう一
方、圧電素子Ｘの押圧が解除されると同素子Ｘの
電気的出力が元へ復し、駆動出力の消滅により電
磁弁SVが復旧してアルコールの供給を停止する。 Therefore, as the hydrometer 10 floats, it is pressed by the head of the hydrometer 10 to suppress the vibration state of the piezoelectric element As a result, the solenoid valve SV is driven to open state and start supplying alcohol, so that the hydrometer 10 sinks in response, while the pressure of the piezoelectric element When released, the electrical output of the element X returns to its original state, and the disappearance of the drive output causes the solenoid valve SV to recover and stop supplying alcohol.
なお、ポテンシヨメータVRの摘みにダイヤル
を設け、これの指示値をアルコールの混入濃度に
より校正しておけば、混入濃度の設定が正確かつ
容易となる。 If a dial is provided on the knob of the potentiometer VR and the indicated value is calibrated based on the concentration of alcohol mixed in, the concentration of mixed alcohol can be set accurately and easily.
また、給水２に対するアルコールの混入状況
は、コツクＶの開放度により設定される。 Further, the mixing status of alcohol in the water supply 2 is set by the degree of opening of the pot V.
したがつて、水槽１と検出槽５とを循環する給
水２のアルコール混入濃度が低下すれば、自動的
にアルコールの供給がなされると共に、混入濃度
の上昇によりアルコールの供給が自動的に停止さ
れるものとなり、給水２のアルコール混入濃度が
安定かつ正確に所定範囲内に保たれ、印刷状況が
常に好適な状態として維持される。 Therefore, if the concentration of alcohol mixed in the feed water 2 circulating between the water tank 1 and the detection tank 5 decreases, alcohol is automatically supplied, and when the concentration increases, the supply of alcohol is automatically stopped. Therefore, the concentration of alcohol mixed in the water supply 2 is stably and accurately maintained within a predetermined range, and the printing condition is always maintained in a suitable state.
また、アルコールの混入濃度は、ポテンシヨメ
ータVRのダイヤルにより示され、これを基準と
して微細に調整できるため、混入濃度の設定が容
易かつ正確となる。 Further, the concentration of alcohol mixed in is indicated by the dial of the potentiometer VR, and can be finely adjusted using this as a reference, making it easy and accurate to set the mixed concentration.
たゞし、圧電素子Ｘとしては、ストレインゲー
ジ等を用いてもよく、場合によつては押圧板１０
ａを省略することもできるうえ、比重計１０の頭
部と圧電素子Ｘとの間へスプリングを介挿しても
よい。 However, a strain gauge or the like may be used as the piezoelectric element
a may be omitted, and a spring may be inserted between the head of the hydrometer 10 and the piezoelectric element X.
また、制御回路は、圧電素子Ｘの特性に応じ上
述と同等の機能を呈するものであれば選定が任意
であり、電磁弁SVの代りに、モータ弁等を電動
弁として用いてもよいと共に、添加剤はアルコー
ルのみならず、アルコール代替液およびエツチン
グ液等、状況に応じた選定が任意であり、種々の
変形が自在である。 Further, the control circuit can be selected arbitrarily as long as it exhibits the same function as described above according to the characteristics of the piezoelectric element X, and instead of the solenoid valve SV, a motor valve or the like may be used as an electric valve. The additive may be selected from not only alcohol, but also alcohol substitute liquid, etching liquid, etc. depending on the situation, and various modifications are possible.
以上の説明により明らかなとおり本発明よれ
ば、簡単な構成により、印刷用給水の添加剤濃度
が安定かつ正確に所定範囲内として保たれ、印刷
状況が常に適正な状態に維持されると共に、添加
剤の余剰消費が阻止され、所要経費の節減が達せ
られ、各種の印刷用給水に対する添加剤の濃度制
御において顕著な効果が得られる。
As is clear from the above description, according to the present invention, the concentration of additives in printing water supply water is stably and accurately maintained within a predetermined range with a simple configuration, and the printing condition is always maintained in an appropriate state. Excess consumption of additives is prevented, cost savings are achieved, and significant effects are achieved in controlling the concentration of additives in various printing water supplies.
図は本発明の実施例を示し、第１図は印刷機の
給水装置を示す構成図、第２図は制御回路のブロ
ツク図である。
１……水槽、２……給水、５……検出槽、７…
…アルコール槽、９……ガイド、１０……比重
計、１０ａ……押圧板、２１……発振器、２２…
…増幅器、２３……検波回路、２４……比較回
路、２５……駆動回路、Ｘ……圧電素子、SV…
…電磁弁（電動弁）。
The drawings show an embodiment of the present invention; FIG. 1 is a block diagram showing a water supply device for a printing press, and FIG. 2 is a block diagram of a control circuit. 1... Water tank, 2... Water supply, 5... Detection tank, 7...
... Alcohol tank, 9 ... Guide, 10 ... Hydrometer, 10a ... Pressing plate, 21 ... Oscillator, 22 ...
...Amplifier, 23...Detection circuit, 24...Comparison circuit, 25...Drive circuit, X...Piezoelectric element, SV...
...Solenoid valve (motorized valve).
Claims (1)
として投入された比重計と、該比重計の頭部と対
向して設けられた圧電素子と、前記比重計の頭部
による押圧に基づく前記圧電素子の電気的特性変
化を検出して駆動出力を生ずる制御回路と、該制
御回路により駆動され前記添加剤の混入濃度を制
御する電動弁とを備えたことを特徴とする印刷用
給水の添加剤濃度制御装置。1. A hydrometer that is floatable and sinkable in water supply for printing mixed with additives, a piezoelectric element provided opposite to the head of the hydrometer, and a Addition of water supply for printing, characterized in that it is equipped with a control circuit that detects a change in electrical characteristics of a piezoelectric element and generates a drive output, and an electric valve that is driven by the control circuit and controls the concentration of the additive mixed in. Agent concentration control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20594983A JPS6097892A (en) | 1983-11-04 | 1983-11-04 | Additive concentration controller of damping water for printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20594983A JPS6097892A (en) | 1983-11-04 | 1983-11-04 | Additive concentration controller of damping water for printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6097892A JPS6097892A (en) | 1985-05-31 |
| JPH0257038B2 true JPH0257038B2 (en) | 1990-12-03 |
Family
ID=16515373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20594983A Granted JPS6097892A (en) | 1983-11-04 | 1983-11-04 | Additive concentration controller of damping water for printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6097892A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS636843U (en) * | 1986-06-27 | 1988-01-18 | ||
| CN112578823A (en) * | 2020-12-25 | 2021-03-30 | 浙江瑞速电器科技有限公司 | Liquid concentration detection proportioner |
-
1983
- 1983-11-04 JP JP20594983A patent/JPS6097892A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6097892A (en) | 1985-05-31 |
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