JP3378918B2 - Guide roller cleaning method and apparatus for rotary printing press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cleaning guide rollers of a rotary printing machine, and more particularly, to adhering to a guide roller provided on the way of a running paper for guiding a running paper which has passed through a printing unit to a folding machine. The present invention relates to a cleaning method and apparatus suitable for removing dirt.

[0002]

2. Description of the Related Art The printing unit of a rotary printing press for newspaper printing is
Offset printing is performed by transferring a pattern from the plate cylinder to the blanket cylinder and printing on the printing paper through the blanket cylinder. Such an offset rotary press usually has several printing units installed side by side, and the running paper discharged from each printing unit is guided to a slitter or turn bar by a large number of guide rollers, and then the folding machine is passed through these. I am trying to lead to.

By the way, when high-speed printing such as newspaper printing is performed, the blanket cylinder is contaminated with ink, paper dust, etc., and needs to be washed. In particular, since the stain on the blanket cylinder is removed after printing about 50,000 to 70,000 copies, it is a very persistent stain, and it is also dangerous. Therefore, a blanket automatic cleaning device has been conventionally used. Further, in the case of newspaper printing, about 4 to 5 printing units are provided, and the printing unit is guided to a folding machine that folds and cuts the printed surface. When this printing paper surface is conveyed to the folding machine, the distance may be long, and 150 to 250 guide rollers are used to smoothly feed the paper without breaking it. When passing through this guide roller,
Immediately after printing, the surface of the ink, which has not dried, comes into contact with the surface of the guide roller. Therefore, as time goes by, stains in which ink and paper powder are mixed adhere to the surface of the guide roller as in the case of the blanket cylinder. Since this dirt causes wrinkles on the paper surface, daily cleaning is important. This one guide roller can be soiled in a short time, but since it reaches as much as 150 to 250 as mentioned above, it requires a lot of work time and many installation locations are high. It is dangerous work. For this reason, automatic cleaning work for the guide rollers is underway.

Some conventional guide roller cleaning devices employ a so-called dry cleaning method in which the guide roller is rotated relative to the running paper to remove it, but a cleaning liquid is used to enhance the cleaning effect. There are many. This cleaning liquid employs a method of directly applying it to a guide roller (Japanese Patent Publication No. 4-58791, JP-A-1-204740).
No.) or a method of coating on running paper (Japanese Patent Publication No. 4-62540, Japanese Patent Laid-Open No. 3-128249, No. 4-128249).
No. 21445, No. 4-126252, etc.) are known. As a result, the stains such as ink adhering to the guide rollers are dissolved and wiped off with running paper.

[0005]

However, in the above-mentioned conventional method, when the cleaning liquid is applied to the guide rollers, it is impractical because a coating device must be provided for each of a large number of guide rollers, which is impractical. Even when applying
It is necessary to provide a cleaning liquid application means such as a liquid tank and a liquid application roller in a narrow rotary press space.

An object of the present invention is, firstly, to provide a cleaning method and an apparatus which do not require a dedicated cleaning liquid supply means for cleaning the guide rollers, focusing on the above conventional problems. A second object of the present invention is to provide a cleaning method and apparatus capable of improving the cleaning efficiency by cleaning the guide roller in conjunction with the blanket cleaning of the printing unit. A third object is to provide a small-sized and low-cost cleaning method and apparatus which can effectively use the space of a rotary press. A fourth object of the present invention is to provide a cleaning method and apparatus that can solve the problem of handling dangerous substances when using a solvent as the cleaning liquid.

[0007]

In order to achieve the above object, a method of cleaning a guide roller of a rotary printing machine according to the present invention is a method of cleaning a guide roller which rolls and guides traveling paper of a rotary printing machine. The cleaning liquid applied to the blanket cylinder by the blanket cleaning unit is transferred to the running paper, and when the running paper impregnated with the transfer cleaning liquid contacts at least the guide roller, the guide roller is rotationally driven to guide the surface of the guide roller. The cleaning is performed.

The second method of cleaning the guide rollers of the rotary printing machine is a method of cleaning the guide roller which rolls on the running paper of the rotary printing machine and guides the traveling, and is continued after the blanket cylinder is cleaned by the blanket cleaning unit. Then, the cleaning liquid is applied to the blanket cylinder by the cleaning device, the applied cleaning liquid is transferred to the running paper, and the guide roller is rotationally driven when the running paper impregnated with the transfer cleaning liquid contacts at least the guide roller. The guide roller surface is cleaned.

A guide roller cleaning device for a rotary printing press according to the present invention is a device for cleaning a guide roller which rolls and guides traveling paper of a rotary printing press, in which a cleaning liquid ejecting means of a blanket cleaning unit is used as a guide roller. It is used as a cleaning liquid supply means to the blanket cylinder and is equipped with a guide roller rotation drive means to clean the blanket cylinder before starting the guide roller cleaning, and then the cleaning supply means is continuously operated to apply and supply the cleaning liquid to the blanket cylinder. And a transfer means impregnated with the transfer cleaning liquid, and when the traveling paper impregnated with the transfer cleaning liquid comes into contact with at least the guide roller, the guide roller is rotationally driven.

[0010]

According to the above construction, the cleaning liquid of the blanket cleaning unit in the printing unit of the rotary printing press is transferred from the blanket cylinder to the running paper when cleaning the guide roller, reaches the guide roller, and the roller surface is rotated by the rotation of the roller. Will be washed. That is, since the cleaning liquid supply means of the blanket cleaning unit is replaced by the cleaning liquid for the guide rollers, the exclusive cleaning liquid supply means for cleaning the guide rollers is not necessary. As a result, a space for a dedicated cleaning liquid supply means is not required, which leads to cost reduction. Moreover, maintenance can be facilitated by reducing the number of monitoring points. Since the cleaning solution supply means can be shared with the blanket cleaning unit, the cleaning solution dedicated to the guide roller is not used, so that the problem of handling dangerous substances when using a solvent is reduced and legal problems such as the Fire Service Law are also reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a guide roller cleaning method and apparatus for a rotary printing press according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the system configuration of a guide roller cleaning device according to the embodiment. The running paper 12 is supplied from a paper feed unit (not shown) to the blanket cylinder 10 which constitutes the printing unit of the rotary printing press, and printing is performed here. The printed running paper 12 that has passed through the blanket cylinder 10 is wound around a large number of guide rollers 14 so as to be carried along a specified running line, and while being turned, it is carried toward the final stage folding machine.

A blanket cleaning unit 1 facing the blanket cylinder 10 in such a rotary press for cleaning and removing ink, paper dust and the like adhering to the surface of the cylinder.
6 is provided. In the embodiment, the blanket cleaning unit 16 uses a cleaning device having a band brush structure,
An endless belt-shaped brush 2 formed in the casing 18
No. 0 is attached to the blanket cylinder 10, and the blanket cylinder 10 is allowed to move in a circle while making contact with the blanket cylinder 10 along the cylinder length direction. Inside the casing 18, a nozzle 22 for injecting a cleaning liquid is provided on the belt brush 20, whereby the brush is immersed in the cleaning liquid, and when the brush is circulated to the surface side, the blanket cylinder 10 is brought into contact with the cleaning liquid-impregnated brush, so that the blanket cylinder It is intended to remove dirt from 10. Although not shown, a means for separating dirt from the brush by a scraper is also provided inside the casing 18. Further, a drive mechanism for separating the belt brush 20 from the blanket cylinder 10 during non-cleaning is provided.

Such a blanket cleaning unit 16
At the same time, a cleaning device for the guide rollers 14 is provided, and a rotation driving means 24 for forcibly rotating each guide roller 14 is provided. It is supposed to be used to wipe off dirt. The rotation driving means 24 is attached to each guide roller 14, and includes an air motor 26 and a drive gear 28 rotated by the air motor 26. Further, a driven gear 30 capable of meshing with the drive gear 28 is attached to the shaft portion of the guide roller 14, and the motor 2 is driven when both gears 28, 30 are meshed.
The guide roller 14 is rotated by the rotational drive of the guide roller 6. It is assumed that the gears 28 and 30 can be disengaged during non-cleaning. Therefore, the air motor 26 and the drive gear 28 are integrally attached to and detached from the air cylinder 32.
The guide roller 14 is movable toward and away from the guide roller 14.

Here, the rotation driving means 24 is attached to each guide roller 14, but proper tension is applied so that the running paper 12 is not wrinkled or cut when the guide roller 14 is washed. There is a need to. For this reason, in this apparatus, a plurality of adjacent two or three guide rollers 14 are rotationally driven as one group at the time of cleaning, and are rotationally driven step by step along the flow direction of the running paper 12 in group units. I am trying. Then, the guide roller 14 on the upstream side is reversely rotated with respect to the traveling paper 12 along the traveling direction of the traveling paper 12, and the guide roller 14 on the downstream side is normally rotated, so that the rotation directions are alternately reversed. Thus, the rotation direction of each air motor 26 is regulated.
Therefore, a common relay valve 34 is provided for each group, and the guide rollers 14 of each group are driven to rotate at the same time, and the rotation direction is alternated between reverse rotation and forward rotation.

By the way, when cleaning the guide roller 14, a cleaning liquid is used to dissolve the ink and paper dust adhering to the surface of the guide roller 14 and wipe the cleaning with the running paper 12, which is applied to the running paper 12. I am trying. The supply means for applying the cleaning solution shares the cleaning solution supply means of the blanket cleaning unit 16 described above.
The cleaning liquid supply means dedicated to the guide roller is omitted. Therefore, when the cleaning of the guide roller 14 is started, the blanket cleaning unit 16 drives the belt brush 20 to rotate, impregnates the belt brush 20 with the blanket cleaning liquid through the nozzle 22, and applies the cleaning liquid to the surface of the blanket cylinder 10. The running paper 12 is transferred and impregnated with this.

Therefore, when the guide roller 14 is cleaned, the blanket cleaning unit 16 is activated, or the cleaning liquid is applied to the blanket cylinder 10 subsequent to the blanket cleaning work, and the blanket cylinder 10 is in contact with the cleaning liquid. The cleaning liquid is transferred to the paper 12. As a result, a predetermined area of the running paper 12 is impregnated with the cleaning liquid and reaches the guide roller 14 by the movement of the running paper 12. When the portion impregnated with the cleaning liquid approaches the guide roller 14, the guide roller 14 is rotated by the rotation driving means 24, and the guide roller 14 is forcibly rotated with respect to the running paper 12 to wipe and clean dirt such as ink adhered to the roller surface. be able to.

In order to perform such an operation, a control panel 36 as a controller is provided to integrally control the blanket cleaning work and the guide roller cleaning work. As an object to be controlled by the control board 36, first, there is a cleaning liquid supply device 38 for cleaning the blanket, and the cleaning liquid is supplied in an increased amount to the belt brush 20 that is moving around for the cleaning operation. Compressed air is introduced into the cleaning liquid supply device 38 from an air source 40 such as a compressor via a regulator 42, and the cleaning liquid is supplied to the nozzle 22 via a pump by controlling the opening / closing of a solenoid valve. As a result, the cleaning liquid is applied to the surface of the cleaned blanket cylinder 10 from the belt brush 20 to which the cleaning liquid is supplied in an increased amount, and the cleaning liquid is transferred to the running paper 12 in contact with the blanket cylinder 10. Of course, the control board 36 is the blanket cylinder 1
It is possible to control the single cleaning of 0, and it is possible to control each drive unit of the blanket cleaning unit 16 by the corresponding sequence program.

Further, the rotation driving means 2 for the guide roller 14
4 is provided with an air solenoid valve box 44 for drive control of
Compressed air supplied from the air source 40 is guided through a regulator 46, and each guide roller 14 can be rotationally driven by a control signal from the control board 36. That is, operating air is supplied to the desorption cylinder 32 by the control board 36 and the driven gear 30 of the guide roller 14 is
The drive gear 28 is meshed with the drive gear 28, and the supply of operating air to the air motor 26 rotates the motor to rotate the guide roller 14. As a result, the guide roller 14 moves the running paper 12
It is rotated at a peripheral speed different from the traveling speed of and the wiping operation is performed by relative sliding. The control panel 36 is the guide roller 1
4 is driven for each group and is controlled so as to be sequentially driven in the traveling direction of the traveling paper 12. This is to interlock the relay valve 34 for each group in a stepwise manner in association with the traveling speed of the traveling paper 12. It is driven so as to be rotationally driven when the cleaning liquid-impregnated portion of the running paper 12 reaches the guide roller 14. As a result, when the impregnation of the running paper 12 with the cleaning liquid arrives, the guide roller 14 is rotated and effective wiping and cleaning is performed.

The blanket cleaning and the subsequent guide roller cleaning work are operated and input by the operation panel 48. The operation panel 48 is provided with simple button switches and changeover switches so that a single operation of blanket cleaning, a guide roller cleaning operation, or a mode in which these are linked can be appropriately selected. The cleaning method using the guide roller cleaning device having such a configuration is as follows. First, the start switch is turned on and the changeover switch of the operation panel 48 is operated to switch the guide roller cleaning to the interlocking mode with the blanket cleaning. As a result, the set time program of the rotary timer provided inside the control panel 36 is switched from the single blanket cleaning to the mode in which the guide roller cleaning is interlocked. Next, the slow running operation of the rotary press is started. As a result,
The traveling speed of 2 is a low speed operation of about several meters per minute. After the start of the loose operation, the cleaning operation button is pressed to start the blanket cleaning. As a result, the blanket cleaning unit 16 comes into contact with the blanket cylinder 10 and the belt brush 20 is driven to rotate. And FIG.
As shown in the time chart of No. 3, the solenoid valve is driven to open / close by the open / close pulse signal, and the cleaning liquid is supplied to the brush 20 through the pump for the time T required for the blanket cleaning. As a result, the belt brush 20 slides on the surface of the blanket cylinder 10 in the axial direction to clean the brush and remove ink and paper dust.

This blanket cleaning is performed by supplying the necessary amount of cleaning liquid for the time T1 and thereafter by the orbiting operation of only the belt brush 20, but in this embodiment, the cleaning liquid is further continued for the guide roller cleaning. It is designed to be jetted (duration T2). The cleaning liquid thus increased is applied to the surface of the blanket cylinder 10 and transferred to the running paper 12. The running paper 12 impregnated with the cleaning liquid by the transfer is conveyed from the blanket cylinder 10 toward the guide roller 14 that follows, and when the cleaning liquid impregnated portion comes close to the guide roller 14 to be cleaned, the control panel 36 The rotary drive means 24 is activated by the setting of the rotary timer, and the guide roller 14 is rotationally driven. As a result, the dirt adhering to the surface of the guide roller 14 is dissolved and wiped off at the subsequent portion of the running paper 12 not impregnated with the cleaning liquid. The guide rollers 14 are driven step by step for each group, and as shown in FIG. 2, as the cleaning liquid impregnated portion of the running paper 12 approaches the corresponding group, the rotation driving means 24 is sequentially activated one after another. The guide rollers 14 of the final group are rotated. Each group will overlap in time. Then, the running paper 12 having the dirt attached thereto is discharged to the outside of the system through the folding machine.

FIG. 3 is a time chart showing a process of independently performing the blanket cleaning operation. In this case, the cleaning liquid is sprayed onto the belt brush 20 during the cleaning liquid supply time T1 and the surface of the blanket cylinder 10 is inspected. However, the cleaning liquid supply is stopped after the time T1. Therefore, it can be understood that when cleaning the guide roller 14 shown in FIG. 2, the cleaning liquid is supplied in an increased amount during the time T2 following the time T1.

According to this embodiment, when the guide roller 14 is cleaned, the cleaning liquid supply means of the blanket cleaning unit 16 which has been conventionally used is used without providing the cleaning liquid supply device for exclusive use, and the blanket cylinder is used. It is possible to clean the guide roller 14 arranged subsequent to 10 with equipment saving. This eliminates the need to separately supply the guide roller cleaning liquid to the equipment, resulting in a significant reduction in equipment cost. Further, since it is not necessary to use an independent cleaning solvent, it is possible to omit the use of dangerous substances, and the attendant effect that the procedures for handling dangerous substances prescribed by the Fire Service Act can be omitted.

In the above embodiment, the cleaning work of the guide roller 14 is shown in conjunction with the blanket cleaning, but it is of course possible to carry out the cleaning of the guide roller alone. Further, the blanket cleaning unit 16 is a cleaning device using the belt brush 20, but a known cleaning means such as a cleaning device using a rotating brush or a blanket cleaning device of a wiping cleaning type using a cleaning sheet can be adopted.

Further, the blanket cleaning unit 16
When the supply amount of the cleaning liquid to be transferred from the running paper 12 to the running paper 12 is insufficient, it is also possible to take a supplementary means for directly applying the cleaning liquid to the running paper 12.

[0026]

As described above, according to the guide roller cleaning method and apparatus for a rotary printing press according to the present invention, the cleaning liquid for cleaning the guide rollers is supplied from the blanket cleaning unit, so that the exclusive cleaning liquid is used. Since the supply means can be eliminated, the facility cost can be reduced and the space can be effectively used, and at the same time, the excellent effect that the range of use of the cleaning liquid, which is a dangerous substance, can be reduced to improve the safety can be obtained. To be

[Brief description of drawings]

FIG. 1 is a configuration diagram of a guide roller cleaning device of a rotary printing press according to an embodiment.

FIG. 2 is a time chart showing a guide roller cleaning process by the apparatus.

FIG. 3 is a time chart showing a blanket cylinder cleaning process for comparison of guide roller cleaning processes by the same apparatus.

[Explanation of symbols]

10 blanket body 12 running paper 14 Guide roller 16 Blanket cleaning unit 18 casing 20 obi brush 22 Cleaning liquid injection nozzle 24 rotation drive means 26 Air motor 28 Drive gear 30 driven gear 32 Desorption cylinder 34 Relay valve 36 control panel 38 Cleaning liquid supply device 40 air source 42 Regulator 44 Air solenoid valve box 46 regulator 48 control panel

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumiaki Sugano 6-27-1 Funabashi, Setagaya-ku, Tokyo Inside the Asahi Shimbun Production Technology Laboratory (72) Inventor Koji Tomizuka 6-27-Funabashi, Setagaya-ku, Tokyo 1 Stock Company Asahi Shimbun, Ltd., Production Technology Laboratory (56) Reference JP-A-1-204740 (JP, A) JP-A-2-235639 (JP, A) JP-A-62-255150 (JP, A) ( 58) Fields investigated (Int.Cl. ⁷ , DB name) B41F 35/00

Claims (3)

(57) [Claims] 1. A method for cleaning a guide roller that rolls and guides traveling paper of a rotary printing press, wherein the cleaning liquid applied to the blanket cylinder by a blanket cleaning unit is transferred onto the traveling paper, and the transfer cleaning liquid is transferred. A guide roller cleaning method for a rotary printing press, wherein the guide roller is rotationally driven to wash the surface of the guide roller when the impregnated running paper contacts at least the guide roller. 2. A method for cleaning a guide roller that rolls on and guides traveling paper of a rotary printing press, comprising: cleaning a blanket cylinder by a blanket cleaning unit, and then continuously applying a cleaning liquid to the blanket cylinder by the cleaning device. The coating is applied, and the applied cleaning liquid is transferred to running paper, and when the running paper impregnated with the transfer cleaning liquid contacts at least the guide roller, the guide roller is rotationally driven to clean the surface of the guide roller. Guide roller cleaning method for rotary press. 3. A device for cleaning a guide roller that rolls and guides traveling paper of a rotary printing press, wherein the cleaning liquid injection means of a blanket cleaning unit is used as a cleaning liquid supply means for the guide roller, and the guide roller is rotated. A drive means is provided to clean the blanket cylinder prior to the start of cleaning of the guide rollers, and then the cleaning supply means is continuously operated to apply and supply the cleaning liquid to the blanket cylinder to transfer it to the running paper and impregnate this transfer cleaning liquid. A guide roller cleaning device for a rotary printing press, comprising: a control unit that rotationally drives the guide roller when the running paper comes into contact with at least the guide roller.