JPH0564876A - Web moistening device in rotary press - Google Patents

Abstract

PURPOSE:To obtain a web moistening device for rotary press capable of uniformly moistening the entire surface of a web with a good efficiency by a simple construction. CONSTITUTION:A water fountain roller 14 is dipped in water 13 in a water duct 12 set between side frames 3 of a cooling device 1. The roller 14 is rotated by an adjustable speed motor 15. A distributing roller 17 is provided between the water fountain roller 14 and a cooling roller 4 or 7 of the cooling device 1 to be brought into contact with the water fountain roller 14 and a web non- contact peripheral surface of the cooling roller 4 or 7. The rotating directions of the distributing roller 17 and the cooling roller 4 or 7 are determined so that the rotating directions of the contact surfaces thereof are reverse to each other. In another embodiment, the distributing roller 17 is not provided, but only the water fountain roller 14 is provided to be brought into contact with the cooling roller 4 or 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web moisturizing device for a rotary printing machine, which is provided in a cooling device between a printing unit and a folding machine and applies moisture to a web which is dried and cooled after printing. ..

[0002]

2. Description of the Related Art In a web rotary printing machine, a web printed by a printing unit is dried on a printing surface by a drying device and then cooled by a cooling device and conveyed to a folder or theta where it is folded or cut. It is collected and collected. In the drying process of such printing process, not only the ink on the printing surface is dried, but also the moisture contained in the paper is removed, so that the paper that is folded by the folding machine is folded. There is a problem that the quality of the printed material may be remarkably deteriorated and the waste paper may be generated because the eyes may be torn or the staple binding part may be cut when binding and stacking the folded signatures. ..

Therefore, conventionally, as a humidifying device for imparting moisture to the web after drying and cooling, an injection needle-like water injection member or a roller-like humidification member is provided in the running path of the web before the folding machine, or the web is run. It has been proposed to provide a silicon applicator that forms a thin film of silicon on the printed surface of the inner web, and also to provide a plurality of nozzles between the drying device and the folding machine while the running web is running. A humidifying device has also been proposed in which water is sprayed onto the humidifier to humidify it directly or through a cooling roller.

[0004]

However, among such conventional humidifiers, in the case where an injection needle-shaped water injection member or a roller-shaped humidification member is provided, the web is moved in the vertical direction, which is the running direction of the web. However, there is a problem in that it cannot deal with humidification of folds extending in the width direction of the web. Also, the silicon applicator is
This is provided for the purpose of preventing paper jam due to static electricity, and if this is also used as a humidifier, there is a problem that the absolute amount of water supplied is insufficient and a sufficient humidifying effect cannot be expected. Furthermore, in the case of spraying water on the running web to humidify it directly or via a cooling roller,
In order to perform uniform humidification without unevenness, it is necessary to reduce the diameter of the water droplets and generate many mist-like water droplets. There is a problem that occurs. Also in this case, a sufficient humidifying effect cannot be expected.

Further, in the case where humidification is performed via the surface of the cooling roller, the water film or water droplets applied to the portion outside the paper width is removed from the running web by being abutted on the cooling roller. Since it is not carried around with, the water film and water droplets gradually accumulate on the cooling roller, and the accumulated water film and water droplets are swung around by the centrifugal force due to the rotation of the cooling roller and scattered around, so that the peripheral members are In addition to rusting, there was a problem that extra water droplets adhered to both ends of the web, and as a result the web broke in the folding machine. Therefore, in order to solve this problem, it has been attempted to provide drainage at the portions corresponding to both ends of the web, but it is difficult to clarify the boundary between the places to be drained and the parts not to be drained, and the water content at both ends of the web is small. There is a problem that it becomes a lot of eyes.

The present invention has been made in view of the above points, and provides a humidifying device for a rotary printing press capable of efficiently and uniformly humidifying the entire surface of a web with a simple structure. The purpose is to.

[0007]

In order to achieve such an object, according to the present invention, a drying device for drying a printed surface of a web and a plurality of cooling rollers for sequentially contacting and cooling a web running after drying. In a rotary printing machine equipped with a cooling device having a cooling roller having a cooling roller, a source roller immersed in water in a watercraft and driven to rotate by a variable speed motor, and the source roller and the web non-contact peripheral surface of the cooling roller are opposed to each other. A metering roller which is rotationally driven by a driving device is provided so that the circumferential direction of the peripheral surface of the abutting portion is opposite to that of the original roller.

According to the second aspect of the invention, there is provided a drying device for drying the printing surface of the web and a cooling device having a plurality of cooling rollers for sequentially contacting and cooling the web running after drying. In a rotary printing machine, a variable speed motor is soaked in water in a water boat to abut against the web non-contact peripheral surface of the cooling roller, and the peripheral direction of the peripheral surface of this contact portion is opposite to the cooling roller. The original roller is driven to rotate.

[0009]

The water pulled up from the water boat by the original roller is transferred to the peripheral surface of the metering roller at the counter contact point between the original roller and the metering roller, and is metered. At the counter contact, it is transferred to the peripheral surface of the cooling roller and then transferred to the surface of the web which runs in contact with the cooling roller for humidification. The water that was not consumed by the chill roller at the web non-contact points on both ends merged with the next water that was transferred from the metering roller to the chill roller, and became half the amount, then transferred to the chill roller again, but cooled. Of the water not consumed by the rollers, the water transferred to the metering rollers due to the opposite circumferential directions of the facing peripheral surfaces is once returned to the water boat via the original rollers, so the cooling rollers Water on both ends does not exceed the specified amount.

According to the second aspect of the present invention, the water drawn up from the watercraft by the original roller is transferred to the peripheral surface of the cooling roller at the contact point between the original roller and the cooling roller, and runs while contacting the cooling roller. It is transferred to the surface of the web and humidified. The water that was not consumed by the cooling roller at the web non-contact points on both ends merged with the next water that was transferred from the original roller to the cooling roller, and became half the amount, then transferred to the cooling roller again. Of the water that was not consumed by the water, the water that had transferred to the cooling roller due to the opposite circumferential directions of the facing peripheral surfaces would once return to the water boat via the original roller, so the water on both ends of the cooling roller Water does not exceed the specified amount.

[0011]

1 and 2 show an embodiment of a web moisturizing device for a rotary printing machine according to the present invention. FIG. 1 is a schematic side view of a cooling device provided with the web moisturizing device, and FIG. It is an outline side view. In the figure, a cooling device 1 is provided between a drying device and a folding machine of a rotary printing machine, and the cooling device 1 includes a pair of left and right frames 3 whose four corners are connected by pipe stays 2. ing. In this embodiment, four cooling rollers 4, 5 are provided on the left and right frames 3.
Both ends of 6 and 7 are arranged so that the lines connecting the centers of each other form a roughly rhombic shape, and are rotatably mounted via bearings. Both ends of a plurality of guide rollers 8 are rotatably supported on the left and right frames 3 via bearings.
The web 9 dried by the drying device after printing is configured to be attached to the cooling rollers 4 to 6 and the guide roller 8 and then delivered toward the folding machine. The back surface of the web 9 is attached to the odd-numbered first cooling roller 4 and the third cooling roller 6, and the front surface of the even-numbered second cooling roller 5 and the fourth cooling roller 7. Has been inscribed.

Then, in the vicinity of the web non-contact surface between the first cooling roller 4 and the third cooling roller 7, the web humidifying device 10 is provided.
And a web humidifier 11 are provided respectively. These web humidifiers 10 and 11 are equipped with a water boat 12 that is erected with both ends supported on the left and right frames.
Water 13 is stored in the water boat 12. Reference numeral 14 is a source roller rotatably supported on the left and right frame 3 sides via bearings, the lower part of which is immersed in the water 13 in the watercraft 12, and is a variable speed motor fixed to the frame 3 side. 15
Is rotatably driven via the belt 16.

Between the original roller 14 and the cooling roller 4 (7), both ends are rotatably supported by a rocking lever or the like on the frame side so that the web of the original roller 14 and the cooling roller 4 (7) is not supported. A metering roller 17 is provided so as to face the abutting surface, and the metering roller 17 is rotationally driven by a driving device (not shown) or the original roller 14 side. The rotation direction of the metering roller 17 that is in contact with the original roller 14 is set so that the circumferential direction of the circumferential surface of the facing portion is opposite to the circumferential direction of the circumferential surface of the facing portion of the original roller 14. .. That is,
The original roller 14 and the metering roller 17 are configured such that the contacting peripheral surfaces thereof slip with each other. The metering roller 1
The peripheral speed of 7 is set to be the same as the peripheral speed of the cooling rollers 4 and 7.

The operation of the web moisturizing device configured as described above will be described. Prior to the printing work, one end of the web 9
So-called paper passing from the paper feeding device to the printing unit and the drying device is performed to guide it in front of the cooling device 1, and the cooling rollers 4, 5, 6, 7 and the guide roller 8 are passed through the paper, and the paper is guided to, for example, a folding machine. Thread through. Then, the transfer roller 13 is brought into pressure contact with the web non-contact surface of the cooling rollers 4 and 7, and then the printing operation is started.

When the printing operation is started, the web 9 printed by the printing unit and dried by the drying device is cooled by contacting the cooling rollers 4, 5, 6, 7 with the front surface and the back surface alternately. The individual guide rollers 8 run alongside each other. At this time, the water 13 pulled up from the watercraft 12 by the original roller 14 is transferred to the peripheral surface of the metering roller 17 at the counter contact point between the original roller 14 and the metering roller 17, and is then metered. At the contact points between the roller 17 and the cooling rollers 4 and 7, it is transferred to the peripheral surface of the cooling roller,
Is transferred to the front surface and the back surface of the web 9 which is in contact with each other and is humidified.

In this case, the original roller 14 and the metering roller 17
Since and are slipping, all the water 13 pulled up by the original roller 14 is carried to the metering roller 17,
Further, it is transferred to the cooling rollers 4 and 7. Cooling rollers 4,7
The water in the web non-contact portions at both ends which was not consumed in the above process merges with the next water which is transferred from the metering roller 17 to the cooling rollers 4 and 7, and becomes a half amount thereof, and then to the cooling rollers 4 and 7 again. Of the water that was transferred, but was not consumed by the cooling roller, the water that was transferred to the metering roller 17 due to the opposite circumferential directions of the facing peripheral surfaces was transferred to the watercraft 12 via the original roller 14. Since it returns once, the water on both ends of the cooling rollers 4 and 7 does not exceed a predetermined amount.

FIG. 3 is a schematic side view of the vicinity of the cooling roller showing the web humidifying device according to the second aspect of the invention, corresponding to FIG.
Since the structure of the cooling device for carrying out this is the same structure as the case of the web humidifying device according to claim 1 shown in FIG. 1, the description thereof will be omitted, and when necessary thereafter, it will be described with reference to this drawing. In the present invention, the metering roller 17 is not provided, and the original roller 14A which is immersed in the water 13 in the watercraft 12 and serves as a variable speed motor is directly contacted with the cooling roller 4 (7).

With such a configuration, the water 13 pulled up from the water boat 12 by the original roller 14A.
Is transferred to the peripheral surface of the cooling roller 4 (7) at the counter contact point between the original roller 14 and the cooling roller 4 (7),
Humidification is performed by transferring to the front surface and the back surface of the web 9 that travels in contact with (7).

In this case, the original roller 14A and the cooling roller 4
(7) is slipping, so that the original roller 14
All the water 13 pulled up by A is the cooling roller 4 (7).
Transfer to. The water not consumed by the cooling roller 4 (7) at the web non-contact points at both ends thereof merges with the next water transferred from the original roller 14A to the cooling roller 4 (7) to become a half amount, and again. Of the water that was transferred to the cooling roller 4 (7) but was not consumed by the cooling roller 4 (7), the water that was transferred to the original roller 14A due to the opposite circumferential directions of the facing peripheral surfaces was Since the water will once return to the water boat 12, water will not accumulate on both ends of the cooling roller 4 (7) and exceed a predetermined amount.

[0020]

As is apparent from the above description, according to the present invention, a cooling device having a drying device for drying a printed surface of a web and a plurality of cooling rollers for sequentially contacting and cooling the web running after drying are provided. In a rotary printing machine equipped with a device, an original roller immersed in water in a water boat and driven to rotate by a variable speed motor is in contact with the original roller and the web non-contact peripheral surface of the cooling roller, and the pair of rollers are in contact with each other. A water film having the same thickness is always formed on the cooling roller by providing a metering roller that is rotationally driven by a drive device so that the circumferential direction of the contact surface is opposite to that of the original roller. Even if the width of the web changes, the necessary water film can be supplied without adjustment, so rusting of surrounding parts due to excess water splashing,
The tearing of the web due to the attachment of excess water droplets on both ends of the web can be eliminated, and the humidifying function is improved.

According to the second aspect of the present invention, the cooling roller is immersed in water in a water boat and abuts against the web non-contacting peripheral surface of the cooling roller, and the circumferential direction of the peripheral surface of the contacting portion is the cooling roller. By providing the original roller that is driven to rotate in the opposite direction by the variable speed motor, a water film of the same thickness is always formed on the cooling roller, and even if the width of the web changes Since the film can be supplied without adjustment, it is possible to eliminate rusting of peripheral members due to splashing of excess water and tearing of the web due to excess water droplets adhering to both ends of the web. Is improved.

[Brief description of drawings]

FIG. 1 is a schematic side view of a cooling device that implements a web humidifier.

FIG. 2 is a schematic side view of the vicinity of a cooling roller.

3 is a schematic side view in the vicinity of a cooling roller showing an embodiment of the invention according to claim 2 corresponding to FIG. 2. FIG.

[Explanation of symbols]

 1 Cooling Device 4 Cooling Roller 5 Cooling Roller 6 Cooling Roller 7 Cooling Roller 9 Web 10 Web Humidifying Device 11 Web Humidifying Device 12 Water Boat 13 Water 14 Original Roller 15 Variable Speed Motor 16 Belt 17 Metering Roller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akira Kosuge Akira Kosuge No. 210 Kirigasaku, Sekijuku-cho, Higashi-Katsushika-gun, Chiba Prefecture Komori Corporation Sekijuku Plant

Claims (2)

[Claims] 1. A rotary printing machine comprising a drying device for drying a printed surface of a web and a cooling device having a plurality of cooling rollers for sequentially adhering and cooling a web running after drying, in a water boat. The original roller, which is immersed in water and is driven to rotate by a variable speed motor, is in contact with the original roller and the web non-contact circumferential surface of the cooling roller, and the circumferential direction of the circumferential surface of the facing portion is opposite to that of the original roller. A web moisturizing device for a rotary printing press, comprising: a metering roller that is rotationally driven by a driving device so as to be oriented. 2. A rotary printing machine comprising a drying device for drying a printed surface of a web and a cooling device having a plurality of cooling rollers for sequentially contacting and cooling the web running after drying, in a water boat. The original roller that is immersed in water and abuts against the web non-contact peripheral surface of the cooling roller and is rotationally driven by a variable speed motor so that the peripheral direction of the peripheral surface of the contact portion is opposite to the cooling roller. A web moisturizing device for a rotary printing press, comprising: