WO2020100396A1 - Water fountain contamination prevention device for offset printing machine - Google Patents

Water fountain contamination prevention device for offset printing machine Download PDF

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Publication number
WO2020100396A1
WO2020100396A1 PCT/JP2019/035648 JP2019035648W WO2020100396A1 WO 2020100396 A1 WO2020100396 A1 WO 2020100396A1 JP 2019035648 W JP2019035648 W JP 2019035648W WO 2020100396 A1 WO2020100396 A1 WO 2020100396A1
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WIPO (PCT)
Prior art keywords
water
blade
ink
supply roller
water supply
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PCT/JP2019/035648
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French (fr)
Japanese (ja)
Inventor
Masayuki IZUME (井爪 雅幸)
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アイマー・プランニング株式会社
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Publication of WO2020100396A1 publication Critical patent/WO2020100396A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/32—Ducts, containers, or like supply devices for liquids

Definitions

  • This invention relates to the prevention of pollution of water boats in offset printing machines.
  • ink is supplied from the ink fountain to the plate cylinder via the ink fountain roller, the doctor roller, and the kneading roller.
  • dampening water is supplied to the plate cylinder from a water boat via a water supply roller. Part of the ink on the plate cylinder adheres to the water supply roller, reaches the water tank, mixes with the dampening water in the water tank, and emulsifies the dampening water.
  • the fountain solution is emulsified, the print quality is deteriorated. Therefore, it is necessary to wash the water tank, adjust the printing machine, etc., and the workability is deteriorated, and the waste paper is increased.
  • Patent Document 1 JP 2007-51252A
  • JP 2007-51252A a cleaning agent for removing the ink from the water supply roller
  • the problem of this invention is to prevent the dampening water from being contaminated by the ink carried by the water supply roller from the plate cylinder.
  • a water boat contamination prevention device for an offset printing machine is in contact with a water supply roller of an offset printing machine, and scrapes water and ink from the water supply roller at a transport surface on the water supply roller from the plate cylinder to the water boat.
  • the suction pump is connected to the water collecting pipe and sucks water and ink from the blade through the water collecting hole.
  • the surface of the water supply roller can be divided into a surface that conveys water from the water cylinder to the plate cylinder and a surface that conveys water and ink from the plate cylinder to the water cylinder.
  • the transfer surface from the plate cylinder to the water boat transfers water remaining on the water supply roller without adhering to the plate cylinder, water on the plate cylinder and ink, and the ink contaminates the dampening water of the water boat. .
  • the blade scrapes water and ink from the water supply roller, and the water and ink are discharged from the water collection hole through the pipe.
  • the suction pump sucks water and ink from the blade through the water collecting hole.
  • the ink conveyed from the water supply roller to the water boat can be removed and the mixing of the ink in the water boat can be reduced, so that the dampening water can be prevented from being contaminated. Therefore, the printing quality is stable, and it is possible to reduce the work such as the adjustment of the printing machine, the washing of the water jet, and the washing of the water supply roller. Further, when the print quality is stable, the amount of wasted paper that occurs in the process of adjusting the printing conditions according to the state of the printing machine is reduced. Further, according to the present invention, since the water and the ink on the blade are sucked by the suction pump, the water and the ink scraped off the water supply roller by the blade are quickly discharged and do not collect on the blade.
  • the blade contacts the water supply roller parallel to the axis of the water supply roller, and the drainage channel is inclined so that the suction pump side is on the lower side.
  • the slope of the drainage channel allows the water and ink in the pipe to be quickly discharged. ..
  • the opening area per length of the blade of the water collection hole is small on the suction pump side and large on the opposite side.
  • the pressure difference between the inside and outside of the water collection pipe is large on the suction pump side and small on the opposite side. Therefore, if the opening area per length of the blade is small on the suction pump side and large on the opposite side, water and ink can be sucked almost uniformly over the entire length of the blade.
  • the length of the blade is the length in the longitudinal direction of the blade, in other words, the length in the direction parallel to the axis of the water supply roller.
  • the blade is held between the pair of mounting plates attached to the water collecting pipe so that the blade is pressed by the mounting plate over the entire length of the blade.
  • the blade bends or distorts, so that the blade does not come into uniform contact with the water supply roller.
  • the contact between the blade and the water supply roller becomes unstable. Therefore, if the blade is pressed over the entire length of the blade, the blade is less likely to bend or distort, and the blade is in stable contact with the water supply roller.
  • FIG. 1 Schematic showing the offset printing machine and the pollution control device of the embodiment
  • Front view showing a mounting plate and a blade in a modified example The top view which shows the attachment of the blade to the attachment plate in an Example.
  • reference numeral 2 denotes a printing unit of an offset printing machine, and four CMYK units are provided for each printing machine.
  • Reference numeral 4 denotes a water boat pollution prevention device, which does not include the water boat 16 and the water supply rollers 17 to 19.
  • Reference numeral 16 denotes a water boat, which is a tank of dampening water, and supplies water to the water boat 6 from a water supply pipe (not shown).
  • the dampening water is supplied from the water boat 6 to the plate cylinder 5 through the water supply rollers 17 to 19.
  • the arrows indicate the rotation directions of the rollers 5 and 17 to 19, the water film 20 is formed on the rollers 17 to 19, and the dampening water is supplied to the non-pixel portions of the plate cylinder 5.
  • Ink is supplied from the roller 14 to the pixel portion of the plate cylinder 5, the ink is transferred to the blanket cylinder 6, and is printed on paper (not shown) or the like. ..
  • Water and ink exist on the surface of the plate cylinder 5, and these are conveyed in order from the water supply roller 19 to the water supply roller 17 to the water boat 16 side. Further, the water remaining without moving from the water supply roller 19 to the plate cylinder 5 is also conveyed to the water boat 16 side.
  • the surface of the water supply rollers 17 to 19 on which water, ink, and the like are transferred from the plate cylinder 5 to the water tank 16 is a water tank transfer surface 21.
  • the surface on which the water film 20 is transported is the transportation surface from the water boat 16 to the plate cylinder 5.
  • a blade 22 is brought into contact with the conveying surface 21 of the water supply rollers 17 to 19 toward the water boat 16 to scrape off water and ink deposits from the surfaces of the water supply rollers 17 to 19.
  • the scraped water and ink are discharged from the water collecting pipe 24 to the drain tank 28.
  • the suction pump 26 sucks water, ink, and the like attached to the blade 22 into the water collecting pipe 24.
  • the blade 22 may come into contact with the conveyance surface to the water boat 16 in any of the water supply rollers 17 to 19, and may come into contact with the rollers 18 and 19 as well as the roller 17. Further, the number and arrangement of the water supply rollers 17 to 19 are not related to the present invention.
  • the water in the drainage tank 28 is treated with, for example, a filter 30 to remove a part of the ink particles, the pigment in the ink, the organic matter eluted from the ink, etc., and the wastewater purification device 32 removes the remaining ink particles, the pigment, the organic matter, etc. To do.
  • the water regenerated by the waste water purification device 32 is returned from the water supply pump 34 to the water boat 16.
  • the suction pump 26, drainage tank 28, filter 30, drainage purification device 32, and water supply pump 34 are shared by each unit of the printing machine.
  • Reference numeral 27 is a drain pipe that connects the water collection pipe 24 and the drain tank 28. Note that the waste water in the tank 28 may be discarded without providing the waste water purification device 32.
  • FIG. 2 shows the arrangement of the blade 22 with respect to the water supply roller 17.
  • the blade 22 is made of, for example, a hard synthetic resin, a specific material is arbitrary, a blade is provided at the tip, and is a long plate shape.
  • a blade or the like for collecting ink from the ink fountain roller 8 or the like can be used as the blade 22.
  • the tip of the blade 22 on the water supply roller 17 side is arranged parallel to the axis of the water supply roller 17, and the blade 17 is brought into uniform contact with the water supply roller 17.
  • the water collecting pipe 24 is inclined so that the suction pump 26 side faces downward, and 42 is a drainage channel in the pipe 24.
  • both ends of the water collecting pipe 24 are fixed to the mounting members 45 and 46 so that the water collecting pipe 24 can be supported by the frame of the printing machine or the like.
  • the attachment member 45 on the suction pump 26 side is provided with a hole continuing to the drainage channel 42, and the attachment member 46 on the opposite side is closed to prevent air from entering.
  • the blade 22 is housed in, for example, the groove between the pair of mounting plates 40, 40, and a pressing force is applied substantially uniformly over the entire length of the blade 22, thereby fixing the blade 22 to the mounting plates 40, 40.
  • the mounting plate 40 has a trapezoidal shape
  • the blade 22 also has a trapezoidal shape.
  • the groove may be provided only on one of the pair of mounting plates 40, 40, and the other mounting plate may remain flat. This also applies to the modifications of FIGS. 3 and 5.
  • the water collecting pipe 24 is provided with a water collecting hole 44 along the longitudinal direction of the blade 22 near the base of the mounting plate 40, and the suction pump 26 sucks water, ink and the like from the blade 22 and the mounting plate 40.
  • the opening area of the water collecting hole 44 is small on the suction pump 26 side and large on the opposite side per length of the blade 22. By doing so, the water and the ink can be sucked from the blade 22 side almost uniformly over the entire length of the blade 22.
  • FIG. 3 shows a rectangular blade 23, and the pair of mounting plates 41, 41 has a rectangular shallow groove in a plan view shown by a broken line, and the blade 23 is accommodated in this groove.
  • FIG. 4 shows the mounting of the blade 22 on the mounting plate 40.
  • the attachment plates 40, 40 fixed to each other are heated, the gap between them is expanded, and the blade 22 is pushed until the bottom of the blade 22 reaches the bottom of the groove.
  • the mounting plates 40, 40 cool, the groove contracts, a uniform pressing force acts on the blade 22, and the blade 22 is fixed to the mounting plates 40, 40. Therefore, the blade 22 does not vibrate when coming into contact with the water supply rollers 17 to 19. Further, since the blade 22 is not fixed by a local force but is fixed by applying a substantially uniform force to the entire blade 22, the blade 22 is not bent or distorted.
  • FIG. 5 shows a modification of mounting the blade 22.
  • the blade 22 is housed in the groove 51 of the mounting plates 50, 50, and a fastening force is applied to the blade 22 by tightening bolts or the like through the fastening holes 52 arranged along the periphery of the blade 22. Also in this case, it is possible to apply a substantially uniform pressing force over the entire length of the blade 22.
  • FIG. 6 shows a modified water collecting pipe 60, and a gutter 62 is attached to the bottom of the pipe 60.
  • the water and ink that have entered the pipe 60 through the water collection hole 44 are discharged from the drainage channel 64 of the gutter 62, and the drainage channel 64 is inclined so that the outlet side (suction pump side) is downward.
  • the shape of the pipe 60 can be simplified.
  • FIG. 7 shows a modified water collection hole 72.
  • the water collection pipe 70 has a groove 71 inclined so that the outlet side faces downward, and the groove 71 is provided with a plurality of water collection holes 72.
  • the length, arrangement pitch, width, etc. of the water collecting holes 72 are changed along the longitudinal direction of the blade 22, and the opening area per length of the blade 22 is small on the downstream side of the water collecting pipe 70 and large on the upstream side. To do. Even in this case, a substantially uniform suction force can be exerted over the entire length of the blade 22.
  • FIG. 8 schematically shows the contact of the blade 22 with the water supply roller 17.
  • the surface of the blade 22 on the roller side is arranged so as to overlap the tangential plane of the roller 17 so that the blade 22 does not grind the surface of the roller 17.
  • a straightening vane 80 shown by a chain line may be provided so as to cover the path from the blade 22 to the water collecting hole, and air may be sucked intensively from the vicinity of the tip of the blade 22. ..
  • the operation of the embodiment will be described.
  • the blade 22 scrapes off dirty water (mixture of water and ink) returning from the plate cylinder 5 to the water boat 16. Therefore, it is possible to reduce the contamination of the dampening water of the water boat 16.
  • the pollution of dampening water can be reduced, and the printing conditions are stable. For this reason, it is possible to reduce the trouble of adjusting the printing conditions and reduce the waste paper due to the adjustment of the printing conditions. Further, it is possible to reduce the work such as cleaning the water boat and the water supply roller.
  • the wastewater is purified by the wastewater purification device 32 and reused, the wastewater containing ink can be reduced.

Abstract

A water fountain contamination prevention device (4) scrapes water and ink off a water supply roller (17 to 19) using a blade (22, 23) over a conveyance surface (21) on the water supply roller (17 to 19) from a plate cylinder (5) to a water fountain (16). The water and the ink are collected from the blade (22, 23) into a catchment pipe (24, 60) and discharged, and the water and the ink are suctioned from the blade (22, 23) by means of a suction pump (26). Contamination of dampening water in the water fountain (16) is prevented, and printing quality is stabilized.

Description

オフセット印刷機用の水舟の汚染防止装置Water boat pollution control device for offset printing machine
　この発明はオフセット印刷機での水舟の汚染防止に関する。 This invention relates to the prevention of pollution of water boats in offset printing machines.
　オフセット印刷機では、インキ壺からインキ壺ローラ、ダクターローラ、練りローラを介し、版胴にインキを供給する。また水舟から給水ローラを介して、版胴に湿し水を供給する。版胴のインキの一部は給水ローラに付着し、水舟に達して水舟の湿し水と混和し、湿し水を乳化させる。湿し水が乳化すると、印刷品質が低下するので、水舟の洗浄、印刷機の調整等が必要になり、作業性が低下すると共に、損紙も増加する。 In the offset printing machine, ink is supplied from the ink fountain to the plate cylinder via the ink fountain roller, the doctor roller, and the kneading roller. In addition, dampening water is supplied to the plate cylinder from a water boat via a water supply roller. Part of the ink on the plate cylinder adheres to the water supply roller, reaches the water tank, mixes with the dampening water in the water tank, and emulsifies the dampening water. When the fountain solution is emulsified, the print quality is deteriorated. Therefore, it is necessary to wash the water tank, adjust the printing machine, etc., and the workability is deteriorated, and the waste paper is increased.
　版胴からのインキによる給水ローラの汚染に関し、給水ローラからインキ除去する洗浄剤が提案されている（特許文献１：特開2007-51252）。しかし給水ローラを洗浄するには印刷機を停止させる必要があり、また給水ローラを洗浄しても湿し水の汚染は解消しない。 Regarding the contamination of the water supply roller by the ink from the plate cylinder, a cleaning agent for removing the ink from the water supply roller has been proposed (Patent Document 1: JP 2007-51252A). However, in order to clean the water supply roller, it is necessary to stop the printing machine, and even if the water supply roller is cleaned, the dampening water is not contaminated.
特開2007-51252JP2007-51252
　この発明の課題は、版胴から給水ローラにより運ばれるインキによる、水舟の湿し水の汚染を防止することにある。 The problem of this invention is to prevent the dampening water from being contaminated by the ink carried by the water supply roller from the plate cylinder.
　この発明のオフセット印刷機用の水舟の汚染防止装置は、オフセット印刷機の給水ローラと接触し、版胴から水舟への給水ローラ上の搬送面で、給水ローラから水とインキを掻き取るブレードと、
　ブレードから水とインキを受け取る集水孔を備え、受け取った水とインキを排水路から排出する集水パイプと、
　集水パイプに接続され、集水孔を介してブレードから水とインキを吸引する吸引ポンプ、を備えている。 A water boat contamination prevention device for an offset printing machine according to the present invention is in contact with a water supply roller of an offset printing machine, and scrapes water and ink from the water supply roller at a transport surface on the water supply roller from the plate cylinder to the water boat. A blade,
A water collecting pipe for collecting water and ink from the blade, and a water collecting pipe for discharging the received water and ink from the drainage channel,
The suction pump is connected to the water collecting pipe and sucks water and ink from the blade through the water collecting hole.
　給水ローラの表面は、水舟から版胴へ水を搬送する面と、版胴から水舟へ水とインキを搬送する面とに分けることができる。そして版胴から水舟への搬送面は、版胴に付着せずに給水ローラに残った水、版胴の水とインキ、等を搬送し、このインキが水舟の湿し水を汚染する。 The surface of the water supply roller can be divided into a surface that conveys water from the water cylinder to the plate cylinder and a surface that conveys water and ink from the plate cylinder to the water cylinder. The transfer surface from the plate cylinder to the water boat transfers water remaining on the water supply roller without adhering to the plate cylinder, water on the plate cylinder and ink, and the ink contaminates the dampening water of the water boat. .
　この発明では、ブレードにより給水ローラから水とインキを掻き取り、集水孔からパイプを介して水とインキを排出する。また吸引ポンプにより、集水孔を介して、ブレードの水とインキを吸引する。この結果、給水ローラから水舟へ搬送されるインキを除去し、水舟へのインキの混入を少なくできるので、湿し水の汚染を防止できる。従って印刷品質が安定し、印刷機の調整、水舟の洗浄、給水ローラの洗浄等の作業を少なくできる。また印刷品質が安定すると、印刷機の状態に合わせて印刷条件を調整する過程で生じる損紙も少なくなる。さらにこの発明では、吸引ポンプによりブレードの水やインキを吸引するので、給水ローラからブレードへ掻き取られた水やインキは速やかに排出され、ブレードに溜まらない。 In this invention, the blade scrapes water and ink from the water supply roller, and the water and ink are discharged from the water collection hole through the pipe. The suction pump sucks water and ink from the blade through the water collecting hole. As a result, the ink conveyed from the water supply roller to the water boat can be removed and the mixing of the ink in the water boat can be reduced, so that the dampening water can be prevented from being contaminated. Therefore, the printing quality is stable, and it is possible to reduce the work such as the adjustment of the printing machine, the washing of the water jet, and the washing of the water supply roller. Further, when the print quality is stable, the amount of wasted paper that occurs in the process of adjusting the printing conditions according to the state of the printing machine is reduced. Further, according to the present invention, since the water and the ink on the blade are sucked by the suction pump, the water and the ink scraped off the water supply roller by the blade are quickly discharged and do not collect on the blade.
　好ましくは、ブレードは給水ローラの軸と平行に給水ローラに接触し、排水路は吸引ポンプ側が下側となるように傾斜している。排水路が傾斜しているので、パイプに入った水とインキは速やかに排出される。　 Preferably, the blade contacts the water supply roller parallel to the axis of the water supply roller, and the drainage channel is inclined so that the suction pump side is on the lower side. The slope of the drainage channel allows the water and ink in the pipe to be quickly discharged. ‥
　好ましくは、集水孔のブレードの長さ当たりの開口面積が、吸引ポンプ側で小さく、その反対側で大きい。集水パイプの内外での気圧差は、吸引ポンプ側で大きく、その反対側で小さい。そこでブレードの長さ当たりの開口面積を、吸引ポンプ側で小さく、その反対側で大きくすると、ブレードの全長に渡ってほぼ均一に水とインキを吸引できる。なおブレードの長さとは、ブレードの長手方向の長さで、言い換えると給水ローラの軸に平行な方向の長さである。 Preferably, the opening area per length of the blade of the water collection hole is small on the suction pump side and large on the opposite side. The pressure difference between the inside and outside of the water collection pipe is large on the suction pump side and small on the opposite side. Therefore, if the opening area per length of the blade is small on the suction pump side and large on the opposite side, water and ink can be sucked almost uniformly over the entire length of the blade. The length of the blade is the length in the longitudinal direction of the blade, in other words, the length in the direction parallel to the axis of the water supply roller.
　好ましくは、集水パイプに取り付けられた一対の取付板の間に、ブレードの全長に渡って取付板から押圧されるように、ブレードが保持されている。ブレードに局部的に力を加えると、ブレードが撓みあるいは歪んで、給水ローラと均一に接触しなくなる。またブレードが取付板に対して遊んでいると、ブレードと給水ローラとの接触が不安定になる。そこでブレードの全長に渡って取付板から押圧すると、ブレードの撓みや歪みが少なく、またブレードは給水ローラに安定して接触する。 Preferably, the blade is held between the pair of mounting plates attached to the water collecting pipe so that the blade is pressed by the mounting plate over the entire length of the blade. When a force is locally applied to the blade, the blade bends or distorts, so that the blade does not come into uniform contact with the water supply roller. Further, when the blade is idle with respect to the mounting plate, the contact between the blade and the water supply roller becomes unstable. Therefore, if the blade is pressed over the entire length of the blade, the blade is less likely to bend or distort, and the blade is in stable contact with the water supply roller.
オフセット印刷機と実施例の汚染防止装置とを示す概略図Schematic showing the offset printing machine and the pollution control device of the embodiment 給水ローラに対する実施例の汚染防止装置の配置を示す図The figure which shows arrangement | positioning of the pollution prevention device of the Example with respect to a water supply roller. 変形例での取付板とブレードとを示す正面図Front view showing a mounting plate and a blade in a modified example 実施例での取付板へのブレードの取付を示す平面図The top view which shows the attachment of the blade to the attachment plate in an Example. 変形例でのブレードと取付板を示す平面図Plan view showing a blade and a mounting plate in a modification 変形例のパイプを示す図Diagram showing a modified pipe 変形例の集水孔を示す図The figure which shows the water collection hole of a modification 実施例での、給水ローラに対するブレードの配置を示す図The figure which shows arrangement | positioning of the blade with respect to a water supply roller in an Example.
　以下に本発明を実施するための最適実施例を示す。 The following is an optimum embodiment for implementing the present invention.
　図１～図８に、実施例とその変形を示す。図１において、２はオフセット印刷機の印刷ユニットで、印刷機１台当たり例えばＣＭＹＫの４ユニットが設けられている。４は水舟の汚染防止装置で、水舟１６及び給水ローラ１７～１９は含まない。 1 to 8 show an embodiment and its modification. In FIG. 1, reference numeral 2 denotes a printing unit of an offset printing machine, and four CMYK units are provided for each printing machine. Reference numeral 4 denotes a water boat pollution prevention device, which does not include the water boat 16 and the water supply rollers 17 to 19.
　５は版胴、６はブランケット胴である。インキ壺７とインキ壺ローラ８の間にインキを溜め、ダクターローラ９及びローラ１０～１４を介して、版胴５にインキを供給する。１６は水舟で、湿し水の水槽であり、図示しない給水管から水舟６に給水する。水舟６から給水ローラ１７～１９を介して、版胴５へ湿し水を供給する。矢印はローラ５，１７～１９の回転方向を示し、ローラ１７～１９には水膜２０が形成され、版胴５の非画素部に湿し水が供給される。版胴５の画素部にはローラ１４からインキが供給され、ブランケット胴６にインキが転写され、図示しない紙等に印刷される。　 5 is a plate cylinder, 6 is a blanket cylinder. Ink is stored between the ink fountain 7 and the ink fountain roller 8, and the ink is supplied to the plate cylinder 5 through the doctor roller 9 and the rollers 10 to 14. Reference numeral 16 denotes a water boat, which is a tank of dampening water, and supplies water to the water boat 6 from a water supply pipe (not shown). The dampening water is supplied from the water boat 6 to the plate cylinder 5 through the water supply rollers 17 to 19. The arrows indicate the rotation directions of the rollers 5 and 17 to 19, the water film 20 is formed on the rollers 17 to 19, and the dampening water is supplied to the non-pixel portions of the plate cylinder 5. Ink is supplied from the roller 14 to the pixel portion of the plate cylinder 5, the ink is transferred to the blanket cylinder 6, and is printed on paper (not shown) or the like. ‥
　版胴５の表面には水とインキが存在し、これらは給水ローラ１９から給水ローラ１７の順に水舟１６側へ搬送される。また給水ローラ１９から版胴５に移らずに残った水も、水舟１６側へ搬送される。なお給水ローラ１７～１９の表面で、版胴５から水舟１６へ水、インキ等を搬送している面が水舟への搬送面２１である。水膜２０を搬送している面が、水舟１６から版胴５への搬送面である。 Water and ink exist on the surface of the plate cylinder 5, and these are conveyed in order from the water supply roller 19 to the water supply roller 17 to the water boat 16 side. Further, the water remaining without moving from the water supply roller 19 to the plate cylinder 5 is also conveyed to the water boat 16 side. The surface of the water supply rollers 17 to 19 on which water, ink, and the like are transferred from the plate cylinder 5 to the water tank 16 is a water tank transfer surface 21. The surface on which the water film 20 is transported is the transportation surface from the water boat 16 to the plate cylinder 5.
　給水ローラ１７～１９の水舟１６側への搬送面２１にブレード２２を接触させ、給水ローラ１７～１９の表面から水とインキ等の付着物を掻き取る。掻き取った水とインキを集水パイプ２４から排水タンク２８へ排出する。また吸引ポンプ２６により、ブレード２２に付着した水とインキ等を集水パイプ２４へ吸引する。なおブレード２２は、給水ローラ１７～１９の何れかにおいて、水舟１６への搬送面に接触すれば良く、ローラ１７に限らず、ローラ１８，１９に接触しても良い。また給水ローラ１７～１９の個数、配置等は本発明とは関係がない。 A blade 22 is brought into contact with the conveying surface 21 of the water supply rollers 17 to 19 toward the water boat 16 to scrape off water and ink deposits from the surfaces of the water supply rollers 17 to 19. The scraped water and ink are discharged from the water collecting pipe 24 to the drain tank 28. Further, the suction pump 26 sucks water, ink, and the like attached to the blade 22 into the water collecting pipe 24. It should be noted that the blade 22 may come into contact with the conveyance surface to the water boat 16 in any of the water supply rollers 17 to 19, and may come into contact with the rollers 18 and 19 as well as the roller 17. Further, the number and arrangement of the water supply rollers 17 to 19 are not related to the present invention.
　排水タンク２８の水を例えばフィルタ３０で処理し、インキ粒子、インキ中の顔料、インキから溶出した有機物等の一部を除去し、排水浄化装置３２により残りのインキ粒子、顔料、有機物等を除去する。排水浄化装置３２により再生した水を、給水ポンプ３４から水舟１６へ還流させる。なお吸引ポンプ２６，排水タンク２８，フィルタ３０，排水浄化装置３２，給水ポンプ３４は、印刷機の各ユニットで共用する。また２７は、集水パイプ２４と排水タンク２８を接続する排水パイプである。なお排水浄化装置３２を設けず、タンク２８の排水を廃棄しても良い。 The water in the drainage tank 28 is treated with, for example, a filter 30 to remove a part of the ink particles, the pigment in the ink, the organic matter eluted from the ink, etc., and the wastewater purification device 32 removes the remaining ink particles, the pigment, the organic matter, etc. To do. The water regenerated by the waste water purification device 32 is returned from the water supply pump 34 to the water boat 16. The suction pump 26, drainage tank 28, filter 30, drainage purification device 32, and water supply pump 34 are shared by each unit of the printing machine. Reference numeral 27 is a drain pipe that connects the water collection pipe 24 and the drain tank 28. Note that the waste water in the tank 28 may be discarded without providing the waste water purification device 32.
　図２は、給水ローラ１７に対するブレード２２の配置を示す。ブレード２２は例えば硬質の合成樹脂から成り、具体的な材質は任意で、先端に刃が設けられ、長尺の板状である。ブレード２２には、インキ壺ローラ８等からインキを回収するブレード等を転用できる。ブレード２２の給水ローラ１７側の先端を給水ローラ１７の軸に平行に配置し、給水ローラ１７にブレード１７を均一に接触させる。集水パイプ２４は吸引ポンプ２６側が下向きとなるように傾斜し、４２はパイプ２４内の排水路である。また集水パイプ２４の両端を取り付け部材４５，４６に固定し、印刷機のフレーム等により支持できるようにする。吸引ポンプ２６側の取り付け部材４５には排水路４２に続く孔が設けられ、反対側の取り付け部材４６は空気が入らないように閉じてある。 FIG. 2 shows the arrangement of the blade 22 with respect to the water supply roller 17. The blade 22 is made of, for example, a hard synthetic resin, a specific material is arbitrary, a blade is provided at the tip, and is a long plate shape. A blade or the like for collecting ink from the ink fountain roller 8 or the like can be used as the blade 22. The tip of the blade 22 on the water supply roller 17 side is arranged parallel to the axis of the water supply roller 17, and the blade 17 is brought into uniform contact with the water supply roller 17. The water collecting pipe 24 is inclined so that the suction pump 26 side faces downward, and 42 is a drainage channel in the pipe 24. Further, both ends of the water collecting pipe 24 are fixed to the mounting members 45 and 46 so that the water collecting pipe 24 can be supported by the frame of the printing machine or the like. The attachment member 45 on the suction pump 26 side is provided with a hole continuing to the drainage channel 42, and the attachment member 46 on the opposite side is closed to prevent air from entering.
　ブレード２２を例えば一対の取付板４０，４０の間の溝に収容し、ブレード２２の全長に渡ってほぼ均一に押圧力を加え、取付板４０，４０にブレード２２を固定する。図２では取付板４０は台形状で、ブレード２２も台形状である。なお一対の取付板４０，４０の一方にのみ溝を設け、他方の取付板は平面状のままにしても良い。またこのことは、図３，図５の変形例等でも同様である。 The blade 22 is housed in, for example, the groove between the pair of mounting plates 40, 40, and a pressing force is applied substantially uniformly over the entire length of the blade 22, thereby fixing the blade 22 to the mounting plates 40, 40. In FIG. 2, the mounting plate 40 has a trapezoidal shape, and the blade 22 also has a trapezoidal shape. The groove may be provided only on one of the pair of mounting plates 40, 40, and the other mounting plate may remain flat. This also applies to the modifications of FIGS. 3 and 5.
　集水パイプ２４は、取付板４０の根元付近に、ブレード２２の長手方向に沿った集水孔４４を備え、吸引ポンプ２６により水とインキ等をブレード２２及び取付板４０から吸引する。集水孔４４の開口面積は、ブレード２２の長さ当たりで、吸引ポンプ２６側が小さく、その反対側で大きい。このようにすると、ブレード２２の全長に渡り、ほぼ均一に水とインキをブレード２２側から吸引できる。 The water collecting pipe 24 is provided with a water collecting hole 44 along the longitudinal direction of the blade 22 near the base of the mounting plate 40, and the suction pump 26 sucks water, ink and the like from the blade 22 and the mounting plate 40. The opening area of the water collecting hole 44 is small on the suction pump 26 side and large on the opposite side per length of the blade 22. By doing so, the water and the ink can be sucked from the blade 22 side almost uniformly over the entire length of the blade 22.
　図３は長方形のブレード２３を示し、一対の取付板４１，４１は破線で示す平面視で長方形の浅い溝を備え、この溝にブレード２３を収容する。 FIG. 3 shows a rectangular blade 23, and the pair of mounting plates 41, 41 has a rectangular shallow groove in a plan view shown by a broken line, and the blade 23 is accommodated in this groove.
　図４は、ブレード２２の取付板４０への取付を示す。互いに固定済みの取付板４０，４０を加熱し、それらの隙間を膨張させ、ブレード２２の底辺が溝の底辺に達するまでブレード２２を押し込む。取付板４０，４０が冷えると溝は収縮し、ブレード２２に均一な押圧力が働き、ブレード２２は取付板４０，４０に固定される。このため給水ローラ１７～１９に接触した際に、ブレード２２は振動しない。また局所的な力で固定するのではなく、ブレード２２の全体にほぼ均一な力を加えて固定するので、ブレード２２の撓みや歪みが生じない。 FIG. 4 shows the mounting of the blade 22 on the mounting plate 40. The attachment plates 40, 40 fixed to each other are heated, the gap between them is expanded, and the blade 22 is pushed until the bottom of the blade 22 reaches the bottom of the groove. When the mounting plates 40, 40 cool, the groove contracts, a uniform pressing force acts on the blade 22, and the blade 22 is fixed to the mounting plates 40, 40. Therefore, the blade 22 does not vibrate when coming into contact with the water supply rollers 17 to 19. Further, since the blade 22 is not fixed by a local force but is fixed by applying a substantially uniform force to the entire blade 22, the blade 22 is not bent or distorted.
　図５はブレード２２の取付の変形例を示す。取付板５０，５０の溝５１にブレード２２を収容し、ブレード２２の周辺に沿って配置した締結孔５２にボルト等を通して締め、ブレード２２に押圧力を加える。この場合も、ブレード２２の全長に渡り、ほぼ均一な押圧力を加えることができる。 FIG. 5 shows a modification of mounting the blade 22. The blade 22 is housed in the groove 51 of the mounting plates 50, 50, and a fastening force is applied to the blade 22 by tightening bolts or the like through the fastening holes 52 arranged along the periphery of the blade 22. Also in this case, it is possible to apply a substantially uniform pressing force over the entire length of the blade 22.
　図６は変形例の集水パイプ６０を示し、パイプ６０の底部に樋６２を取り付ける。集水孔４４からパイプ６０に入った水とインキは、樋６２の排水路６４から排出され、排水路６４は出口側（吸引ポンプ側）が下となるように傾斜している。この変形例では、集水パイプ６０自体を傾斜させる必要が無いので、パイプ６０の形状を簡単にできる。 FIG. 6 shows a modified water collecting pipe 60, and a gutter 62 is attached to the bottom of the pipe 60. The water and ink that have entered the pipe 60 through the water collection hole 44 are discharged from the drainage channel 64 of the gutter 62, and the drainage channel 64 is inclined so that the outlet side (suction pump side) is downward. In this modified example, since it is not necessary to incline the water collection pipe 60 itself, the shape of the pipe 60 can be simplified.
　図７は変形例の集水孔７２を示し、集水パイプ７０には出口側が下向きとなるように傾斜した溝７１があり、溝７１に集水孔７２が複数設けられている。そして集水孔７２の長さ、配列ピッチ、幅等を、ブレード２２長手方向に沿って変化させ、ブレード２２の長さ当たりの開口面積を集水パイプ７０の下流側で小さく、上流側で大きくする。このようにしても、ブレード２２の全長に渡り、ほぼ均一な吸引力を及ぼすことができる。 FIG. 7 shows a modified water collection hole 72. The water collection pipe 70 has a groove 71 inclined so that the outlet side faces downward, and the groove 71 is provided with a plurality of water collection holes 72. The length, arrangement pitch, width, etc. of the water collecting holes 72 are changed along the longitudinal direction of the blade 22, and the opening area per length of the blade 22 is small on the downstream side of the water collecting pipe 70 and large on the upstream side. To do. Even in this case, a substantially uniform suction force can be exerted over the entire length of the blade 22.
　図８は、給水ローラ１７へのブレード２２の接触を模式的に示す。ブレード２２のローラ側の面をローラ１７の接平面と重なるように配置し、ブレード２２がローラ１７の表面を研削しないようにする。ローラ１７の表面には水とインキを主成分とする液膜８２があり、これらをブレード２２により掻き取り、吸引ポンプからの気流により集水孔へ吸引する。なおブレード２２から集水孔への経路を覆うように、鎖線で示す整流板８０を設け、ブレード２２の先端付近から集中的に空気を吸引しても良い。　 FIG. 8 schematically shows the contact of the blade 22 with the water supply roller 17. The surface of the blade 22 on the roller side is arranged so as to overlap the tangential plane of the roller 17 so that the blade 22 does not grind the surface of the roller 17. On the surface of the roller 17, there is a liquid film 82 mainly composed of water and ink, which is scraped off by the blade 22 and sucked into the water collecting hole by the air flow from the suction pump. A straightening vane 80 shown by a chain line may be provided so as to cover the path from the blade 22 to the water collecting hole, and air may be sucked intensively from the vicinity of the tip of the blade 22. ‥
　実施例の作用を示す。
1)　版胴５から水舟１６へ戻る汚れた水（水とインキ等の混合物）を、ブレード２２で掻き取る。このため、水舟１６の湿し水の汚染を減らすことができる。
2)　湿し水の汚染を少なくできるので、印刷条件が安定する。このため印刷条件の調整の手間を減らし、印刷条件の調整に伴う損紙も少なくできる。また水舟と給水ローラの清掃等の作業を減らすことができる。
3)　排水浄化装置３２で排水を浄化し再使用すると、インキ等を含んだ排水を減らすことができる。 The operation of the embodiment will be described.
1) The blade 22 scrapes off dirty water (mixture of water and ink) returning from the plate cylinder 5 to the water boat 16. Therefore, it is possible to reduce the contamination of the dampening water of the water boat 16.
2) The pollution of dampening water can be reduced, and the printing conditions are stable. For this reason, it is possible to reduce the trouble of adjusting the printing conditions and reduce the waste paper due to the adjustment of the printing conditions. Further, it is possible to reduce the work such as cleaning the water boat and the water supply roller.
3) If the wastewater is purified by the wastewater purification device 32 and reused, the wastewater containing ink can be reduced.
4)　排水路４２等を傾斜させることにより、水とインキを速やかにタンク２８へ排出できる。
5)　吸引ポンプ２６により、集水孔４４から空気を吸引することにより、ブレード２２付近の水やインキを吸引できる。従って、インキがブレード２２にこびりつく等のトラブルが少ない。
6)　集水孔４４の開口面積は、集水パイプ２４の上流側で大きく、下流側で小さい。このため、ブレード２２の全長に渡りほぼ均一に水とインキを吸引できる。　
7)　ブレード２２の全長に渡り、取付板からほぼ均一な押圧力を加える。このためブレード２２は撓みや歪みが少なく、給水ローラに均一に接触する。またブレード２２を取付板に遊び無しに固定するので、ブレード２２の振動が少なく、ブレード２２と給水ローラの摩耗を少なくできる。
　 4) By inclining the drainage channel 42 and the like, water and ink can be quickly discharged to the tank 28.
5) The suction pump 26 sucks air from the water collecting hole 44 to suck water or ink around the blade 22. Therefore, there are few troubles such as ink sticking to the blade 22.
6) The opening area of the water collection hole 44 is large on the upstream side of the water collection pipe 24 and small on the downstream side. Therefore, water and ink can be sucked almost uniformly over the entire length of the blade 22.
7) Apply a substantially uniform pressing force from the mounting plate over the entire length of the blade 22. For this reason, the blade 22 has little bending and distortion, and evenly contacts the water supply roller. Further, since the blade 22 is fixed to the mounting plate without play, vibration of the blade 22 is small, and wear of the blade 22 and the water supply roller can be reduced.
２　印刷ユニット　　４　水舟の汚染防止装置　　５　版胴
６　ブランケット胴　　７　インキ壺　　８　インキ壺ローラ
９　ダクターローラ　　１０～１４　ローラ　　１６　水舟
１７～１９　給水ローラ　　２０　水膜　　２１　搬送面
２２，２３　ブレード　　２４，６０　集水パイプ
２６　吸引ポンプ　　２７　排水パイプ　　２８　排水タンク
３０　フィルタ　　３２　排水浄化装置　　３４　給水ポンプ
４０，４１　取付板　　４２　排水路　　４４　集水孔
４５，４６　取り付け部材　　５０　取付板　　５１　溝
５２　締付孔　　６２　樋　　６４　排水路　　７０　集水パイプ
７１　溝　　７２　集水孔　　８０　整流板　　８２　液膜　 2 Printing unit 4 Water pollution control device 5 Plate cylinder 6 Blanket cylinder 7 Ink fountain 8 Ink fountain roller 9 Dactor roller 10 to 14 roller 16 Water tank 17 to 19 Water supply roller 20 Water film 21 Conveying surface 22, 23 Blade 24, 60 water collection pipe 26 suction pump 27 drainage pipe 28 drainage tank 30 filter 32 drainage purification device 34 water supply pump 40, 41 mounting plate 42 drainage channel 44 water collection hole 45, 46 mounting member 50 mounting plate 51 groove 52 tightening hole 62 gutter 64 Drainage channel 70 Water collection pipe 71 Groove 72 Water collection hole 80 Rectifier plate 82 Liquid film

Claims (4)

  1. 　オフセット印刷機の給水ローラと接触し、版胴から水舟への給水ローラ上の搬送面で、給水ローラから水とインキを掻き取るブレードと、
    　前記ブレードから水とインキを受け取る集水孔を備え、受け取った水とインキを排水路から排出する集水パイプと、
    　前記集水パイプに接続され、前記集水孔を介してブレードから水とインキを吸引する吸引ポンプ、を備えている、オフセット印刷機用の水舟の汚染防止装置。     A blade that comes into contact with the water supply roller of the offset printing machine and scrapes water and ink from the water supply roller on the transport surface on the water supply roller from the plate cylinder to the water boat.
    A water collecting pipe for collecting water and ink from the blade, and a water collecting pipe for discharging the received water and ink from the drainage channel,
    A water boat contamination prevention device for an offset printing machine, comprising a suction pump connected to the water collection pipe and sucking water and ink from a blade through the water collection hole.
  2. 　前記ブレードは給水ローラの軸と平行に給水ローラに接触するように構成され、
    　かつ前記排水路は前記吸引ポンプ側が下側となるように傾斜していることを特徴とする、請求項１のオフセット印刷機用の水舟の汚染防止装置。　　     The blade is configured to contact the water supply roller parallel to the axis of the water supply roller,
    2. The water boat pollution control device for an offset printing press according to claim 1, wherein the drainage channel is inclined so that the suction pump side is on the lower side.
  3. 　前記集水孔のブレードの長さ当たりの開口面積が、前記吸引ポンプ側で小さく、その反対側で大きくなるように構成されていることを特徴とする、請求項１または２のオフセット印刷機用の水舟の汚染防止装置。　　　 The offset printing machine according to claim 1 or 2, wherein an opening area of the water collecting hole per length of the blade is small on the suction pump side and large on the opposite side. Water boat pollution prevention device. ：
  4. 　前記集水パイプに取り付けられた一対の取付板の間に、ブレードの全長に渡って取付板から押圧されるように、前記ブレードが保持されていることを特徴とする、請求項１～３のいずれかのオフセット印刷機用の水舟の汚染防止装置。　　 The blade is held between a pair of attachment plates attached to the water collecting pipe so as to be pressed by the attachment plate over the entire length of the blade. Water boat pollution control device for offset printing machines in Japan. ――
PCT/JP2019/035648 2018-11-16 2019-09-11 Water fountain contamination prevention device for offset printing machine WO2020100396A1 (en)

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US4359799A (en) * 1980-06-18 1982-11-23 Bse Ake A Doctor blades
JPH0970957A (en) * 1995-09-06 1997-03-18 Komori Corp Cylinder washing device of printing press
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JP2015139975A (en) * 2014-01-30 2015-08-03 アイマー・プランニング株式会社 Dampening water apparatus for printing machine

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