JPH11268241A - Antidewing device of cooling roller for offset rotary press - Google Patents

Antidewing device of cooling roller for offset rotary press

Info

Publication number
JPH11268241A
JPH11268241A JP7746198A JP7746198A JPH11268241A JP H11268241 A JPH11268241 A JP H11268241A JP 7746198 A JP7746198 A JP 7746198A JP 7746198 A JP7746198 A JP 7746198A JP H11268241 A JPH11268241 A JP H11268241A
Authority
JP
Japan
Prior art keywords
water
cooling
roller
offset rotary
cooling roller
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
Application number
JP7746198A
Other languages
Japanese (ja)
Inventor
Yoshiaki Mori
芳明 森
Eisuke Yasubayashi
英輔 安林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kandenko Co Ltd
Original Assignee
Kandenko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kandenko Co Ltd filed Critical Kandenko Co Ltd
Priority to JP7746198A priority Critical patent/JPH11268241A/en
Publication of JPH11268241A publication Critical patent/JPH11268241A/en
Pending legal-status Critical Current

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent dew condensation of a cooling roller for an offset rotary press with a simple constitution. SOLUTION: The antidewing device of a cooling roller for an offset rotary press comprises a cooling roller 7, a water inlet tube 8 to the roller 7, a water outlet tube 9, a refrigerator 11, a chilled water tank 12, pipings 14, 15 for the chilled water, an ordinary temperature water tank 18, and ordinary temperature water pipings 20, 21, a cooling water pump 13 and an ordinary temperature water pump 19. During a printing operation, cooling water is supplied to the roller 7 like arrows with solid lines. When the press is stopped, switching valves 24a, 24b are switched according to a stop command signal, ordinary temperature water is fed to the roller 7 as indicated by arrows of with broken lines, thereby antidewing the roller. Replacement of the chilled water with the ordinary temperature water in the roller 7 is conducted by circulating the ordinary temperature water for a predetermined time to match the real circumstances by a timer 27.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、オフセット輪転印
刷機を停止したとき、印刷後、乾燥機から出てきた用紙
を冷却する冷却ローラの表面に結露が生じて、印刷紙が
濡れたことにより、再起動時の紙切れ発生を防止する冷
却ローラの結露防止装置に関するものである。
BACKGROUND OF THE INVENTION The present invention relates to an offset rotary printing press, in which, after printing, dew condensation occurs on the surface of a cooling roller for cooling paper coming out of a dryer after printing, and the printing paper gets wet. More specifically, the present invention relates to a dew condensation preventing device for a cooling roller which prevents the occurrence of paper breakage at the time of restart.

【0002】[0002]

【従来の技術】図3は、オフセット輪転印刷機の概略を
示したものである。ロール状印刷紙1は、約700回転
/毎分、の高速で印刷機に送られ、4本の色別印刷ロー
ラ3により印刷される。印刷された印刷後紙4のインキ
は、乾燥機5で急速乾燥され、乾燥後紙6は、110〜
120℃の温度になる。次いで、12〜15℃の冷水が
流れる4本の冷却ローラ7との接触により、冷却後紙1
0は、印刷前紙2の温度に戻され、寸断と折込みの工程
に移る。
2. Description of the Related Art FIG. 3 schematically shows an offset rotary printing press. The roll-shaped printing paper 1 is sent to a printing machine at a high speed of about 700 revolutions / minute, and is printed by four color-specific printing rollers 3. The printed ink on the printed paper 4 is rapidly dried in the dryer 5, and the dried paper 6 is 110 to 110.
A temperature of 120 ° C. is reached. Next, by contact with four cooling rollers 7 through which cold water of 12 to 15 ° C. flows, the cooled paper 1
0 is returned to the temperature of the paper 2 before printing, and the process proceeds to the cutting and folding process.

【0003】このような高速で運転されている印刷機
を、昼休み、作業者の交代、その他、印刷機内部のイン
キ調整、色合せ等の不具合が生じて停止した場合には、
冷却ローラ7内の冷水温度12〜15℃と周囲の空気温
度との差により、該冷却ローラ7の表面に結露が生じて
しまい、印刷後紙4が濡れて紙切れが起こる。一度紙切
れが生じると、再度復旧するには、20〜30分もかか
り、作業者の労力負担や印刷紙のロス等の生産効率の低
下を招くことになる。
[0003] When a printing machine operating at such a high speed is stopped due to a problem such as a lunch break, a change of workers, or ink adjustment or color matching inside the printing machine,
Due to the difference between the temperature of the cold water 12 to 15 ° C. in the cooling roller 7 and the temperature of the surrounding air, dew condensation occurs on the surface of the cooling roller 7, and the paper 4 gets wet after printing and the paper breaks. Once a paper break occurs, it takes as long as 20 to 30 minutes to recover again, resulting in a decrease in production efficiency such as labor burden on the operator and loss of printing paper.

【0004】図4は従来のオフセット輪転印刷機用冷却
ローラの結露防止装置を示したものである(実公平8−
7260号公報参照)。図において6は冷却前の紙、7
は冷却ローラ、10は冷却後の紙を示し、8はローラ冷
却用水の入路管、9は冷却水の出路管である。49は冷
凍機で冷却器56及び冷媒凝縮器57により構成され、
夏場においては冷却ローラ7による昇温水を冷却器56
により冷却して冷却ローラ7に入路管43,8、出路管
9,44及びポンプ51を介して循環供給する。
FIG. 4 shows a conventional dew condensation preventing device for a cooling roller for an offset rotary printing press.
7260). In the figure, 6 is paper before cooling, 7
Denotes a cooling roller, 10 denotes a sheet after cooling, 8 denotes an inlet pipe for roller cooling water, and 9 denotes an outlet pipe of cooling water. 49 is a refrigerator constituted by a cooler 56 and a refrigerant condenser 57,
In summer, the heated water by the cooling roller 7 is supplied to the cooler 56.
, And is circulated to the cooling roller 7 through the inlet pipes 43 and 8, the outlet pipes 9 and 44, and the pump 51.

【0005】50は冷水タンクで冷却ローラ7と冷凍機
49間の水循環系内に設けられていて、装置内の配管が
短かく、滞水量の少ない場合の冷水供給を円滑に行うも
のである。したがって配管が長く滞水量の多い場合には
この冷水タンク50は省略されることができる。33は
膨張タンクで、冷水タンク50に細管34を介して配設
され、冷凍機49と冷却ローラ7間の水循環系全体を満
水系とした場合、水の膨張収縮による若干の体積変動を
吸収するとともに系に水を補給するものである。尚この
膨張タンク33の設置場所は、冷凍機49と冷却ローラ
7間の最も高い位置であれば、必ずしも冷水タンク50
の上部である必要はない。
Reference numeral 50 denotes a cold water tank which is provided in a water circulation system between the cooling roller 7 and the refrigerator 49, and which smoothly supplies cold water when the piping in the apparatus is short and the amount of retained water is small. Therefore, when the piping is long and the amount of retained water is large, the cold water tank 50 can be omitted. Reference numeral 33 denotes an expansion tank, which is disposed in the cold water tank 50 via the thin tube 34, and absorbs a slight volume fluctuation due to expansion and contraction of water when the entire water circulation system between the refrigerator 49 and the cooling roller 7 is filled with water. Along with supplying water to the system. If the expansion tank 33 is installed at the highest position between the refrigerator 49 and the cooling roller 7, the cold water tank 50 is not necessarily installed.
It doesn't have to be at the top.

【0006】48はプレート式熱交換器で、冷凍機49
と後述の冷却塔53との間に設置され、冷凍機49の冷
媒凝縮器57とプレート式熱交換器の高温側32間の流
水管路35,36及びポンプ52を介して冷凍機49に
冷却水を循環供給する。53は冷却塔で、プレート式熱
交換器48の低温側31に流水路管37,38及びポン
プ55を介して連結され、当該プレート式熱交換器48
に冷却水を循環供給する。尚54は冷却塔ファンであ
る。
Reference numeral 48 denotes a plate heat exchanger, and a refrigerator 49.
And a cooling tower 53 which will be described later. The cooling tower 49 is cooled by the pump 52 through the flowing water pipes 35 and 36 between the refrigerant condenser 57 of the refrigerator 49 and the high-temperature side 32 of the plate heat exchanger. Circulate water. A cooling tower 53 is connected to the low-temperature side 31 of the plate heat exchanger 48 via flowing water pipes 37 and 38 and a pump 55, and is connected to the plate heat exchanger 48.
Circulate cooling water to the tank. Reference numeral 54 denotes a cooling tower fan.

【0007】58及び59は冬期用冷水バイパス路で、
冷凍機49を経ないように、流水路管35と冷却ローラ
入路管43,8間及び流水路管36と冷却ローラ出路管
9,44間を直接連結して構成され、外気温が低下する
冬期において冷却ローラ7用冷水を冷凍機49を経ない
で供給する。30はその切替バルブである。39は流水
路管35と冷却ローラ入路管8を切替バルブ41aを介
して連結するバイパス流路管、また40は流水路管36
を冷却ローラ出路管9を切替バルブ41bを介して連結
するバイパス流路管で、ポンプ52及び42により流水
管路35及び36内の冷凍機49冷却用循環水を冷却ロ
ーラ7に供給するバイパス循環路で構成するものであ
る。
[0007] Reference numerals 58 and 59 denote cold water bypasses for winter.
It is constituted by directly connecting between the flowing water pipe 35 and the cooling roller inlet pipes 43 and 8 and between the flowing water pipe 36 and the cooling roller outlet pipes 9 and 44 so as not to pass through the refrigerator 49, and the outside air temperature is reduced. In winter, cold water for the cooling roller 7 is supplied without passing through the refrigerator 49. Reference numeral 30 denotes the switching valve. Reference numeral 39 denotes a bypass passage pipe for connecting the flowing water pipe 35 and the cooling roller inlet pipe 8 via the switching valve 41a, and reference numeral 40 denotes a flowing water pipe 36.
Is a bypass passage pipe connecting the cooling roller outlet pipe 9 via a switching valve 41b, and is a bypass circulation pipe that supplies cooling water for cooling the refrigerator 49 in the flowing water pipes 35 and 36 to the cooling roller 7 by pumps 52 and 42. It is composed of roads.

【0008】この従来の装置は以上のように構成されて
いるので、印刷機を運転中は切替バルブ41a,41b
の操作によりバイパス流路管39,40ルートを閉止
し、流水路管43,44ルートを開放すれば、冷凍機4
9により製造された冷水が冷却ローラ7に循環供給され
るので冷却ローラ7により印刷紙が冷却される。又印刷
機の運転で停止した場合には、切替バルブ41a,41
bの操作により、流水路管43,44ルートを閉止し、
バイパス管路39,40ルートを開放すれば、冷却ロー
ラ7には流水路管35及び36内の冷凍機冷却用常温水
(夏期において約25〜35℃)が循環供給され、冷却
ローラ7表面に結露が生じることはない。
Since this conventional apparatus is constructed as described above, the switching valves 41a and 41b are operated while the printing press is operating.
By closing the bypass flow path pipes 39 and 40 and opening the flowing water pipes 43 and 44 by the operation of
The chilled water produced by 9 is circulated and supplied to the cooling roller 7, so that the printing paper is cooled by the cooling roller 7. When the printing press is stopped, the switching valves 41a, 41
By the operation of b, the running water pipes 43 and 44 are closed,
When the bypass pipes 39 and 40 are opened, room temperature water (about 25 to 35 ° C. in summer) for cooling the refrigerator in the flowing water pipes 35 and 36 is circulated and supplied to the cooling roller 7. There is no condensation.

【0009】[0009]

【発明が解決しようとする課題】しかしながら、上記の
結露防止装置では、印刷機一台に対し、冷凍機冷却用常
温水装置も一台設置される構成になっているため、複数
台の輪転印刷機を同時に稼動させる場合には、複数台分
の冷凍機冷却用常温水装置も設置する必要がある。複数
台分の冷凍機冷却用常温水装置を設置するには、複数台
分の装置自体の費用や消費するエネルギ経費のほか、装
置の設置面積も複数台分だけ必要になる。
However, in the above dew condensation preventing apparatus, a single room-temperature water device for cooling a refrigerator is installed for one printing machine. When operating the refrigerators at the same time, it is necessary to install a plurality of room-temperature water devices for cooling the refrigerators. In order to install a plurality of cold water devices for cooling a refrigerator, not only the costs of the plurality of devices themselves but also the energy costs to be consumed, and the installation area of the devices is required only for the plurality of devices.

【0010】また、上記の結露防止装置では、この装置
を単に本発明のように、複数の印刷機に適用しようとす
ると、印刷機ごとに熱交換器、冷却塔、及び配管からな
る一連の装置を設置することが必要であり、装置の費用
や、装置の制御技術の煩わしさのほか、設置場所の確保
も必要となる。とくに、熱交換器は、高重量で高価な装
置であり、また、冷却塔は、屋外に設置する必要がある
ため、屋外への配管するための費用だけでなく、配管用
スペース確保も必要となる。
Further, in the above dew condensation preventing device, if this device is simply applied to a plurality of printing presses as in the present invention, a series of devices including a heat exchanger, a cooling tower, and piping for each printing press. It is necessary to install a device, and in addition to the cost of the device and the complexity of the control technology of the device, it is also necessary to secure an installation place. In particular, the heat exchanger is a heavy and expensive device, and the cooling tower needs to be installed outdoors.Therefore, it is necessary to secure not only the cost for piping outdoors but also the space for piping. Become.

【0011】このため、熱交換器と冷却塔を各印刷機に
設置する従来技術に代えて、装置費用が安価、運転制御
が容易、設置スペースの少ない新たな結露防止装置を開
発する必要があった。また、上記した結露の現象は、特
に夏期や入梅期に多く発生するが、年間を通しての印刷
物の生産性向上を達成するには、この時期における結露
発生を回避することが必要であり、作業者にとっても、
このような作業環境の悪い時期に、印刷の中断による作
業負担の増大を解消することは、願ってもないことであ
った。
For this reason, it is necessary to develop a new dew-condensation prevention device that is inexpensive, easy to control, and requires little installation space, instead of the conventional technology in which a heat exchanger and a cooling tower are installed in each printing press. Was. In addition, the above-described phenomenon of dew condensation often occurs particularly in the summer and the rainy season, but in order to improve the productivity of printed materials throughout the year, it is necessary to avoid the dew condensation during this time. For
It has never been possible to eliminate the increase in the work load due to the interruption of printing during such a bad working environment.

【0012】また、開発内容も、印刷機が停止すると、
直ちに、冷却ローラ内へ結露の生じない温度の常温水を
供給して冷却ローラ内の冷水を置換し結露を防止すると
いう技術的な面からだけでなく、冷水製造冷凍機の負荷
を最少とするために、常温水の温度を結露を発生しない
温度で、かつ、最低の温度にするという経済的な面から
の要請も求められていた。
[0012] Also, when the printing press stops,
Immediately supply normal temperature water at a temperature that does not cause dew condensation into the cooling roller to replace the cold water in the cooling roller to prevent dew condensation, as well as minimize the load on the chiller that produces cold water. For this reason, there has been a demand for an economical requirement that the temperature of normal-temperature water be a temperature at which dew condensation does not occur and be the lowest temperature.

【0013】[0013]

【課題を解決するための手段】上記課題を解決するため
に、恒温恒湿室での実験や、印刷工場での実証試験を重
ねたところ、常温水の最低温度が20℃であれば冷却ロ
ーラに結露が生じないこと、及び、印刷工場内は、一年
中常に20℃を越えていることから、印刷工場内に貯水
槽を設置すれば、貯水槽内に加熱装置を設ける必要のな
いことを見出した。
In order to solve the above-mentioned problems, experiments in a constant temperature and humidity chamber and verification tests in a printing factory were repeated. No condensation occurs in the printing plant, and since the temperature in the printing plant always exceeds 20 ° C throughout the year, if a water tank is installed in the printing plant, there is no need to install a heating device in the water tank. Was found.

【0014】また、印刷乾燥機は、印刷工場内より3〜
4℃ほど高く、稼動状態が30℃を越える時間帯も多い
ことから、印刷乾燥機の付近に水槽を設置すれば、加熱
手段を設けることなく20℃以上の水温を確保できるこ
とも見出したのである。本発明は、これらの知見をもと
に、常温水槽という小さな貯水槽を印刷機ごとに設置す
ることにより、上記課題を解決することができたのであ
り、その結果、複数台の稼動中オフセット輪転印刷機の
冷却ローラへ供給する冷却水供給装置、及び、停止時に
おける該冷却ローラの結露防止装置を備えたオフセット
輪転印刷機において、前記冷却水供給装置は、複数台の
すべての稼動中オフセット輪転印刷機の冷却ローラへ、
一台の冷却水供給装置により冷水を供給する構成とし、
冷水槽の貯水を冷凍機で冷水とした後、入水管切替弁を
介して前記冷却ローラへ供給して吸熱させてから前記冷
水槽へ還水する装置であること、前記結露防止装置は、
前記オフセット輪転印刷機ごとに備えられた常温水槽と
圧力ポンプとからなり、印刷機の停止指令信号により、
前記入水管切替弁と前記出水管切替弁を直ちに切替え、
前記常温水槽の常温水を前記冷却ローラを経て前記常温
水槽へ還水する装置であることを特徴とするオフセット
輪転印刷機用冷却ローラの結露防止装置の発明となすこ
とができたのである。
In addition, the printing dryer is 3 to 3 times from the inside of the printing factory.
Since the temperature is as high as 4 ° C. and the operating state often exceeds 30 ° C., it has been found that if a water tank is installed near the print dryer, a water temperature of 20 ° C. or more can be secured without providing a heating means. . Based on these findings, the present invention was able to solve the above problem by installing a small water tank called a room temperature water tank for each printing press. In an offset rotary printing press provided with a cooling water supply device for supplying to a cooling roller of a printing press and a device for preventing dew condensation on the cooling roller when stopped, the cooling water supply device includes a plurality of all of the running offset rotary presses. To the cooling roller of the printing press
It is configured to supply cold water by one cooling water supply device,
After storing the water in the cold water tank in the refrigerator with cold water, it is a device that supplies water to the cooling roller via an inlet pipe switching valve to absorb heat, and then returns the water to the cold water tank.
Consists of a normal temperature water tank and a pressure pump provided for each of the offset rotary printing presses, and by a stop command signal of the printing press,
Immediately switch the inlet pipe switching valve and the outlet pipe switching valve,
An apparatus for preventing dew condensation on a cooling roller for an offset rotary printing press, characterized in that the apparatus is a device for returning room temperature water in the room temperature water tank to the room temperature water tank via the cooling roller.

【0015】[0015]

【実施例】図1は、本発明の全体像を示すもので、3
は、図3に示したオフセット輪転印刷機を表わしてお
り、図1では、5台のオフセット輪転印刷機が並列に設
置されているが、本発明の特徴を表わすため、各印刷機
のうちの冷却ローラ7を強調している。各印刷機の冷却
ローラ7には、冷却ローラ部ごとに常温水槽が設置され
ているが、冷却ローラ部への冷却水供給は、一台の冷却
水供給装置11により供給されている。また、この常温
水槽は、水の温度維持のためのエネルギを節約するた
め、印刷乾燥機の近傍に設置されている。
FIG. 1 shows a general view of the present invention.
Represents the offset rotary printing press shown in FIG. 3. In FIG. 1, five offset rotary printing presses are installed in parallel. The cooling roller 7 is emphasized. The cooling roller 7 of each printing press is provided with a room-temperature water tank for each cooling roller unit, and cooling water is supplied to the cooling roller unit by a single cooling water supply device 11. In addition, this room-temperature water tank is installed near the printing dryer in order to save energy for maintaining the temperature of the water.

【0016】図2は、図1における冷却水供給装置と常
温水槽の詳細な構成を示すため、印刷機の運転中に供給
されている冷却水の流れと、運転を停止したとき該冷却
ローラへの結露を防止するために供給されてくる常温水
の流れの詳細を示したものである。図2において、印刷
機の運転中における冷却ローラ7への冷水の供給は、冷
水槽12の貯水を冷水ポンプ13により冷凍機11へ供
給することにより行われる。ここで製造された12〜1
5℃の冷水は、実線の矢印で示すように冷水送ヘッダ1
6より冷水送管14、及び、入水管切替弁24aを介
し、ローラ入水管9を経て冷却ローラ7に送られる。乾
燥後の紙6の熱を吸収した冷却ローラ7の水は、ローラ
出水管9と出水管切替弁24bおよび冷水返管15を介
し、冷水返ヘッダ17を経て冷水槽12に還水すること
により循環する。この時、常温水循環系は、停止してい
る。
FIG. 2 shows a detailed configuration of the cooling water supply device and the room temperature water tank in FIG. 1. The flow of the cooling water supplied during the operation of the printing press and the flow of the cooling water to the cooling roller when the operation is stopped. 5 shows details of the flow of room temperature water supplied to prevent dew condensation. In FIG. 2, the supply of cold water to the cooling roller 7 during operation of the printing press is performed by supplying the water stored in the cold water tank 12 to the refrigerator 11 by the cold water pump 13. 12-1 manufactured here
5 ° C. cold water is supplied to the cold water feed header 1 as shown by the solid arrow.
From 6, the cooling water is sent to the cooling roller 7 via the cold water sending pipe 14 and the water inlet pipe switching valve 24 a, via the roller water inlet pipe 9. The water of the cooling roller 7 that has absorbed the heat of the dried paper 6 is returned to the cold water tank 12 via the cold water return header 17 via the roller water discharge pipe 9, the water discharge pipe switching valve 24 b and the cold water return pipe 15. Circulate. At this time, the normal temperature water circulation system is stopped.

【0017】冷水バイパス弁24cは、複数台の印刷機
を中央の一台の冷水製造装置により運転するために設け
たもので、印刷機の台数および稼動数により、その数に
見合った流量をバイパス管24を介してバイパス制御す
るものである。22は、膨張水槽で、冷水循環および常
温水循環への補給水と循環水の熱膨張を吸収する水槽で
あり、膨張水管23により、冷水槽12、および、常温
水槽18へ供給される。
The chilled water bypass valve 24c is provided for operating a plurality of printing presses by a single chilled water production device at the center, and bypasses a flow rate corresponding to the number according to the number of printing presses and the number of operating presses. The bypass control is performed through the pipe 24. An expansion water tank 22 is a water tank that absorbs replenishment water for the cold water circulation and the normal temperature water circulation and thermal expansion of the circulating water, and is supplied to the cold water tank 12 and the normal temperature water tank 18 by an expansion water pipe 23.

【0018】印刷機に色合せ等の不具合が生じると、印
刷機の停止指令信号が発せられ、この信号を受けて入水
管切替弁24aと出水管切替弁24bは、直ちに冷水循
環から常温水循環に切り替わるように設定されている。
また、同時に、常温水ポンプ19も起動するように設定
されていて、常温水槽18に貯水されている常温水は、
点線の矢印の如く常温水ポンプ19により常温水送管2
0と入水管切替弁24aを介し、ローラ入水管8を経て
冷却ローラ7へ送られる。
When a trouble such as color matching occurs in the printing press, a stop command signal for the printing press is issued, and upon receiving the signal, the inlet pipe switching valve 24a and the outlet pipe switching valve 24b immediately switch from the cold water circulation to the normal temperature water circulation. It is set to switch.
At the same time, the normal temperature water pump 19 is also set to start, and the normal temperature water stored in the normal temperature water tank 18 is:
Room temperature water pipe 2 by room temperature water pump 19 as indicated by the dotted arrow.
It is sent to the cooling roller 7 via the roller water inlet pipe 8 via the water inlet pipe switching valve 24a and 0.

【0019】冷却ローラ7の内部に残存している冷水
は、送られてきた常温水と混合しながらローラ出水管9
と出水管切替弁24bを介し、常温水返管21を経て常
温水槽18に還水される。常温水槽18の貯水には、冷
却ローラ7に残存していた冷水が常温水槽48に混入す
るため、常温水槽18の温度は混合比率分だけ低下す
る。低下しても印刷工場内は通常20℃以上であり、ま
た、常温水槽も印刷機の近傍に設置されているので、2
0℃以下になることは希である。しかしながら、万が一
に備え、電気ヒータ25及びサーモスタット26の制御
により所定の水温まで常温水を昇温する装置が補完的に
設置されている。サーモスタットは、温度設定を任意に
変更できるので、印刷機の稼動台数等の状況に合った調
整を必要とする場合には、結露の発生しない最適水温を
得るように調節することができる。
The cold water remaining inside the cooling roller 7 is mixed with the supplied normal-temperature water, and is mixed with the roller outlet pipe 9.
Then, the water is returned to the room temperature water tank 18 via the room temperature water return pipe 21 via the water pipe switching valve 24b. Since the cold water remaining in the cooling roller 7 is mixed into the normal temperature water tank 48 in the water stored in the normal temperature water tank 18, the temperature of the normal temperature water tank 18 decreases by the mixing ratio. Even if the temperature drops, the temperature inside the printing factory is usually 20 ° C. or higher, and a room-temperature water tank is also installed near the printing press.
It rarely drops below 0 ° C. However, in case of emergency, a device that raises the temperature of normal-temperature water to a predetermined water temperature by controlling the electric heater 25 and the thermostat 26 is additionally provided. The temperature setting of the thermostat can be arbitrarily changed, and therefore, when adjustments are necessary in accordance with the situation such as the number of operating printing presses, the thermostat can be adjusted so as to obtain an optimum water temperature without dew condensation.

【0020】常温水槽18の容積については、0.75
〜1.0m3 あれば良く、形状については作業者のじゃ
まにならないよう薄型立方体とすることが好ましい。冷
却ローラ7に残存している冷水と常温水の完全な入れ替
えを確認するには、常温水返管21の水温を検知して置
換完了を確認する方法と、タイマ27により実状に合せ
て強制的に常温水を循環させて置換完了とする方法があ
る。前者の水温検知方法では、置換完了の確認後に冷却
ローラ本体の保有残熱により置換後の水温が下がり結露
が時々発生したが、後者のタイマ27により常温水を循
環させて置換する方法では発生せず、効果的であった。
The volume of the room temperature water tank 18 is 0.75
May if ~1.0m 3, it is preferable that the shape is a thin cube so as not to interfere with the operator. In order to confirm the complete replacement of the cold water and the normal temperature water remaining in the cooling roller 7, a method of detecting the water temperature of the normal temperature water return pipe 21 to confirm the completion of the replacement and a method of forcibly changing the actual state by the timer 27 are used. There is a method of circulating room temperature water to complete the replacement. In the former water temperature detection method, after confirmation of the completion of the replacement, the remaining water of the cooling roller body causes the water temperature after the replacement to drop and dew condensation sometimes occurs. Was effective.

【0021】印刷機が停止し結露防止装置が起動してか
ら、冷却ローラの結露が消えるまでの時間は、約3分3
0秒であったが、印刷機の再起動後における紙切れは、
一度も生じなかった。また、印刷機の再起動後における
冷却ローラ内の冷却水への置換には、2分40秒かかっ
たが、冷却水の温度は、運転時における温度よりも低い
ため、印刷機への影響はなかった。
The time from when the printing press stops and the dew condensation preventing device starts to when the dew condensation on the cooling roller disappears is about 3 minutes 3.
It was 0 seconds, but the paper out after restarting the printing press
It never occurred. In addition, it took 2 minutes and 40 seconds to replace the cooling water in the cooling roller after restarting the printing press. However, since the temperature of the cooling water is lower than the temperature during operation, the effect on the printing press is not affected. Did not.

【0022】上記では、説明上、一台の印刷機が停止し
た場合について述べたが、複数台が停止した場合でも、
結露防止装置は同様に稼動することは、言うまでもな
い。また、一台の冷却水供給装置により任意の台数の印
刷機に冷水を供給することができるものである。また、
各印刷機の乾燥機から発生する排熱を集めて回収し、こ
の排熱で低温水吸収式冷凍機を稼動させて得た冷水を一
部補完的に使用することもできる。印刷機の乾燥機から
は、通常、約260℃の排ガスが得られるので、これを
熱交換器を介して市販の低温水型吸収式冷凍機を使用す
れば、約10℃の冷水が得られる。
In the above description, the case where one printing press is stopped has been described.
It goes without saying that the anti-condensation device operates similarly. Further, a single cooling water supply device can supply cold water to an arbitrary number of printing presses. Also,
Waste heat generated from the dryer of each printing press can be collected and collected, and cold water obtained by operating the low-temperature water absorption refrigerator using the waste heat can be used partially in a complementary manner. From the dryer of the printing press, exhaust gas of about 260 ° C. is usually obtained, and if this is used through a heat exchanger and a commercially available low-temperature water absorption refrigerator is used, cold water of about 10 ° C. can be obtained. .

【0023】また、本発明では、水冷式冷凍機に代え
て、空冷式冷凍機を採用することもできる。
In the present invention, an air-cooled refrigerator can be employed instead of the water-cooled refrigerator.

【0024】[0024]

【発明の効果】本発明では、オフセット輪転印刷機ごと
に常温水槽という常温水を貯水した貯水槽という構造の
簡単な容器及び圧力ポンプを結露防止装置として設置す
ることにより、複数台の印刷機を同時に稼動させなが
ら、わずか一台の冷水製造装置により、すべての印刷機
の結露を防止することができるので、従来方式の熱交換
器と冷却塔等からなる結露防止機構を備えた印刷機にく
らべ、廉価な装置費用、省エネ、配管系の装置設置面積
の僅少等による格段の経費節約が図れる。
According to the present invention, a plurality of printing presses can be installed by installing, as a dew condensation preventing device, a simple container having a structure of a normal temperature water tank and a water storage tank for storing normal temperature water for each offset rotary printing press. Condensation of all printing presses can be prevented with only one chilled water production device while operating at the same time, so compared to printing presses equipped with a condensation prevention mechanism consisting of a conventional heat exchanger and cooling tower. In addition, inexpensive equipment costs, energy savings, and extremely small cost savings due to the small installation area of the piping system can be achieved.

【0025】冷却塔を使用する場合には、水質管理、清
掃塔の保守作業が欠かせないが、本発明では、なんらそ
の必要はない。本発明の結露防止装置は、貯水槽と圧力
ポンプという簡単な組合わせであるため、電磁弁等によ
り簡単に制御でき、保守も容易である。常温水槽を乾燥
機の近傍に設置することにより、常温水の温度を常によ
り高い温度に保つことができるため、冷却水との置換に
より低下した常温水を昇温する必要が殆どなく、加熱ヒ
ータのエネルギを節約できる。
When a cooling tower is used, water quality management and maintenance of the cleaning tower are indispensable, but the present invention does not require any. Since the dew condensation prevention device of the present invention is a simple combination of a water storage tank and a pressure pump, it can be easily controlled by a solenoid valve or the like, and maintenance is easy. By installing a room temperature water tank near the dryer, the room temperature water can always be kept at a higher temperature, so there is almost no need to raise the room temperature water that has dropped due to replacement with cooling water. Energy can be saved.

【0026】本発明の装置は、印刷工場における既存の
冷水製造装置に対し、装置の機種を問わず、小規模の改
造で設置することができ、改造費も安価であるという効
果を有する。
The apparatus of the present invention can be installed in a small-scale remodeling of an existing chilled water manufacturing apparatus in a printing factory, regardless of the type of the apparatus, and has the effect that the remodeling cost is low.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の全体装置の概念図、FIG. 1 is a conceptual diagram of the entire apparatus of the present invention,

【図2】冷却水と常温水の流れを示す説明図、FIG. 2 is an explanatory diagram showing flows of cooling water and normal temperature water,

【図3】オフセット輪転印刷機の概念図、FIG. 3 is a conceptual diagram of an offset rotary printing press,

【図4】従来の結露防止装置を示す図。FIG. 4 is a diagram showing a conventional dew condensation preventing device.

【主要な符号の説明】[Explanation of major symbols]

1 ロール状印刷紙 2 印刷前紙 3 印刷機 4 印刷後紙 5 乾燥機 6 乾燥後紙 7 冷却ローラ 8 入路管 9 出路管 10 冷却後紙 11 冷凍機 12 冷水槽 13 冷水ポンプ 14 冷水送管 15 冷水返管 16 冷水送ヘッダ 17 冷水返ヘッダ 18 常温水槽 19 常温水ポンプ 20 常温水送管 21 常温水返管 22 膨張水槽 23 膨張水管 24 バイパス管 24a 入水管切替弁 24b 出水管切替弁 24c 冷水バイパス弁 25 電気ヒータ 26 サーモスタット 27 タイマ DESCRIPTION OF SYMBOLS 1 Roll printing paper 2 Before printing paper 3 Printing machine 4 After printing paper 5 Drying machine 6 After drying paper 7 Cooling roller 8 Inlet pipe 9 Outlet pipe 10 Cooled paper 11 Refrigerator 12 Cold water tank 13 Cold water pump 14 Cold water pipe 15 Cold water return pipe 16 Cold water return header 17 Cold water return header 18 Room temperature water tank 19 Room temperature water pump 20 Room temperature water supply pipe 21 Room temperature water return pipe 22 Expansion water tank 23 Expansion water pipe 24 Bypass pipe 24a Water inlet pipe switching valve 24b Water pipe switching valve 24c Cold water Bypass valve 25 Electric heater 26 Thermostat 27 Timer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 複数台の稼動中オフセット輪転印刷機の
冷却ローラ用冷却水供給装置、及び、該印刷機の停止時
における該冷却ローラの結露防止装置を備えたオフセッ
ト輪転印刷機において、 前記冷却水供給装置は、複数台のすべての稼動中オフセ
ット輪転印刷機の冷却ロットへ、一台の冷却水供給装置
により冷水を供給する構成であり、冷水槽の貯水を冷凍
機で冷水とした後、入水管切替弁を介して前記冷却ロー
ラへ供給して吸熱させてから前記冷水槽へ還水する装置
であること、ならびに前記結露防止装置は、前記オフセ
ット輪転印刷機ごとに備えられた常温水槽と圧力ポンプ
とからなり、該印刷機の停止指令信号により、前記入水
管切替弁と前記出水管切替弁を直ちに切替えて、常温水
槽の常温水を前記冷却ローラを経て前記常温水槽へ還水
する装置であること、 を特徴とするオフセット輪転印刷機用冷却ローラの結露
防止装置。
1. An offset rotary printing press comprising: a cooling water supply device for cooling rollers of a plurality of running offset rotary printing presses; and a device for preventing condensation of the cooling rollers when the printing press is stopped. The water supply device is configured to supply chilled water to the cooling lots of all the plurality of running offset rotary printing presses with one cooling water supply device, and after cooling the water stored in the chilled water tank with a refrigerator, A device for supplying heat to the cooling roller through the water inlet pipe switching valve to absorb heat and return the water to the cold water tank, and the dew condensation preventing device includes a room-temperature water tank provided for each offset rotary printing press. A pressure pump, and immediately switches between the inlet pipe switching valve and the outlet pipe switching valve according to a stop command signal of the printing press, and supplies room temperature water in a room temperature water tank through the cooling roller to the room temperature water tank. It is a device for Kaemizu, offset rotary printing machine cooling roller condensation prevention device according to claim.
【請求項2】 前記常温水槽は、前記オフセット輪転印
刷機の乾燥機の近傍に設置されていることを特徴とする
請求項1のオフセット輪転印刷機用冷却ローラの結露防
止装置。
2. The apparatus for preventing dew condensation on a cooling roller of an offset rotary printing press according to claim 1, wherein the room temperature water tank is installed near a dryer of the offset rotary printing press.
JP7746198A 1998-03-25 1998-03-25 Antidewing device of cooling roller for offset rotary press Pending JPH11268241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7746198A JPH11268241A (en) 1998-03-25 1998-03-25 Antidewing device of cooling roller for offset rotary press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7746198A JPH11268241A (en) 1998-03-25 1998-03-25 Antidewing device of cooling roller for offset rotary press

Publications (1)

Publication Number Publication Date
JPH11268241A true JPH11268241A (en) 1999-10-05

Family

ID=13634659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7746198A Pending JPH11268241A (en) 1998-03-25 1998-03-25 Antidewing device of cooling roller for offset rotary press

Country Status (1)

Country Link
JP (1) JPH11268241A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008213164A (en) * 2007-02-28 2008-09-18 Daikin Ind Ltd Cold/hot water circulating system of printing machine and cold/hot water circulating method thereof
JP2009174831A (en) * 2008-01-28 2009-08-06 Naigai Shisetsu Kogyo Kk Air conditioning system and air conditioning method
CN114791197A (en) * 2021-01-23 2022-07-26 柴宁 Cooling water supply installation for package printing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008213164A (en) * 2007-02-28 2008-09-18 Daikin Ind Ltd Cold/hot water circulating system of printing machine and cold/hot water circulating method thereof
JP2009174831A (en) * 2008-01-28 2009-08-06 Naigai Shisetsu Kogyo Kk Air conditioning system and air conditioning method
CN114791197A (en) * 2021-01-23 2022-07-26 柴宁 Cooling water supply installation for package printing

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