JP2020006655A - Blanket cylinder cleaning equipment and blanket cylinder cleaning method - Google Patents

Abstract

To provide blanket cylinder cleaning equipment that can restrain broke from occurring in a blanket cylinder for printing a plurality of printing patterns.SOLUTION: Blanket cylinder cleaning equipment 10 comprises an expansion/compression pad 14 for pressing a cleaning cloth 30 against a blanket cylinder 50 of a rotary press. The expansion/compression pad 14 is arranged along a longitudinal direction of the blanket cylinder 50, and divided to constitute a plurality of blocks along the longitudinal direction. The blocks are constituted to be capable of being individually expanded/compressed, respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cleaning device for a printing press, and more particularly to a device and a method for cleaning a blanket cylinder in a rotary printing press.

  A cleaning device for a blanket cylinder in a rotary printing press is mainly configured by pressing a cleaning cloth impregnated with a cleaning agent onto a rotating blanket cylinder and wiping off dirt attached to the blanket cylinder with the cleaning cloth. Various configurations have been proposed for an actuator for pressing the cleaning cloth, for example, an actuator that presses with a cam or a rod of a cylinder, and an actuator that presses with a pad that expands by supplying air are known. I have.

  The cleaning device disclosed in Patent Document 1 is of a type in which a cleaning cloth is pressed by utilizing expansion of a pad when air is supplied to a tube-type pad. The technique disclosed in Patent Document 1 is for controlling the number of times a cleaning cloth is pressed to clean a blanket cylinder.

  Specifically, if the width of the paper to be printed is different, the degree of contamination of the blanket cylinder differs between a portion where the paper passes and a portion where the paper does not pass. When printing is performed on paper that is significantly narrower than the width of the blanket cylinder, the degree of dirt on the blanket cylinder increases, so it is necessary to increase the number of times the cleaning cloth is pressed for wiping. Patent Document 1 is characterized in that when the degree of contamination of the blanket cylinder differs depending on the width of the paper, the optimum number of times of wiping (the number of times of pressing) is determined in advance, and the number of times of wiping is changed depending on the width of the paper.

JP 2013-63621 A

  The blanket cylinder cleaning device disclosed in Patent Literature 1 changes the number of times the cleaning cloth is pressed, that is, the number of times of wiping, according to the degree of contamination of the blanket cylinder. In addition, it is possible to reduce waste paper.

  However, in recent years, printing may be performed in a plurality of patterns on one blanket cylinder. In such a case, dust and dirt may adhere to only the trunk portion of the blanket cylinder on which one print pattern is printed. In the conventional blanket drum cleaning device, the cleaning cloth is pressed against a portion to which dust and dust are not attached. For this reason, not only printing on one printing pattern but also printing on the other printing pattern have to be stopped, and there is a problem that the amount of waste paper increases and the yield decreases.

  Accordingly, an object of the present invention is to provide a blanket cylinder cleaning apparatus and a blanket cylinder cleaning method that can suppress the occurrence of waste paper in a blanket cylinder that prints a plurality of print patterns.

  A blanket cylinder cleaning device according to the present invention for achieving the above object is a cleaning device including a pad for pressing a cleaning cloth against a blanket cylinder of a rotary printing press, wherein the pad is disposed in a longitudinal direction of the blanket cylinder. And is divided so as to constitute a plurality of blocks along the longitudinal direction, and each of the blocks is configured to be individually operable.

  Further, in the blanket cylinder cleaning device having the above-described features, the pad may be an expansion / contraction pad. With such a configuration, downsizing can be achieved as compared with a configuration in which the pad is operated mechanically.

  Further, in the blanket cylinder cleaning device having the above characteristics, the pad is configured by dividing the expanding / contracting portion of a single expanding / contracting pad to form the block, and a pad base serving as a support plate for the pad; It is desirable to form a frame by fastening a side plate supporting the rollers. According to this feature, since the side plate and the pad base are integrally formed, the rigidity of the blanket cylinder cleaning device can be increased.

  In the blanket cylinder cleaning device having the above-described characteristics, the cleaning cloth may be provided for each of the corresponding blocks in accordance with the division width of the block. According to this feature, even if one of the divided blocks is pressed against the blanket cylinder by one of the pads in the block unit, the cleaning cloth is not likely to be twisted.

  Further, in the blanket cylinder cleaning device having the above-described characteristics, it is preferable that a roller around which the cleaning cloth is wound has an intermediate plate between adjacent rollers. According to this feature, the rotating shaft can be divided for each roller. Therefore, the adjacent rollers can be individually rotated. Further, since the axis of each roller is shortened, the stability of the support can be secured.

  Further, a blanket cylinder cleaning method according to the present invention for achieving the object described above includes a method of cleaning the blanket cylinder by pressing a cleaning cloth through an expansion pad against a blanket cylinder of a rotary printing press. Wherein the expansion / contraction pad is divided so as to form a plurality of blocks along the longitudinal direction of the blanket cylinder, and the expansion / contraction pads of the block corresponding to wiping points along the longitudinal direction of the blanket cylinder. Is inflated to press the cleaning cloth.

  According to the blanket cylinder cleaning device and the blanket cylinder cleaning method having the features described above, it is possible to suppress the occurrence of waste paper in the blanket cylinder that prints a plurality of print patterns, and to improve the product yield. be able to.

It is a side view which shows the structure of the blanket cylinder washing | cleaning apparatus which concerns on embodiment. It is a figure showing the front composition of a pad unit. FIG. 3 is a diagram showing a configuration of an AA cross section in FIG. 2. FIG. 3 is a diagram showing a plan configuration of a pad base constituting the pad unit. FIG. 3 is a diagram showing a bottom configuration of a pad base constituting the pad unit. It is a figure showing the arrangement composition of a distribution unit. It is a partial section perspective view showing the composition of the blanket cylinder cleaning device concerning an embodiment. FIG. 3 is a diagram illustrating a relationship between a printing machine and a blanket cylinder cleaning device. It is a figure showing an example of arrangement of a printing pattern to a blanket cylinder. It is a figure showing composition of a pad unit concerning a modification of a blanket cylinder washing device.

  Hereinafter, embodiments of a blanket cylinder cleaning apparatus and a blanket cylinder cleaning method of the present invention will be described in detail with reference to the drawings. The embodiment described below is a part of a preferred embodiment of the present invention, and a part of the present invention may be implemented even if a part of the configuration is changed without departing from the function thereof. Can be considered.

[Constitution]
First, the basic configuration of the blanket cylinder cleaning device according to the present invention will be described with reference to FIGS. FIG. 1 is a side view showing the configuration of the blanket cylinder cleaning device according to the embodiment. FIG. 2 is a diagram showing a front configuration of the pad unit. FIG. 3 is a diagram showing the configuration of the AA cross section in FIG. FIG. 4 is a diagram illustrating a plan configuration of a pad base constituting the pad unit, and FIG. 5 is a diagram illustrating a bottom configuration thereof. FIG. 6 is a diagram showing an arrangement configuration of the distribution unit. FIG. 7 is a partial cross-sectional perspective view showing the configuration of the blanket cylinder cleaning device according to the embodiment. FIG. 8 is a diagram showing the relationship between the printing press and the blanket cylinder cleaning device. FIG. 9 is a diagram illustrating an example of the arrangement of print patterns on a blanket cylinder.

  The blanket cylinder cleaning device 10 according to the present embodiment plays a role of cleaning the blanket cylinder 50 by pressing the cleaning cloth 30 against the blanket cylinder 50 of the rotary printing press. The blanket cylinder cleaning device 10 is configured on the basis of the pad unit 12, the supply unit 24, and the frame. The pad unit 12 is an element that plays a role of pressing the cleaning cloth 30 against the blanket cylinder 50, and is configured based on the expansion / contraction pad 14 and the pad base 16.

  The expansion / contraction pad 14 expands by introducing a fluid such as air, and contracts by discharging the introduced fluid. The expansion / contraction pad 14 may be formed in a bag shape and may form a space for introducing a fluid alone, but in the present embodiment, the expansion / contraction pad 14 is formed of a flexible and stretchable sheet such as rubber or silicon. A space for introducing a fluid is formed between the pad base 16 and a pad base 16 which will be described in detail later. By forming the expansion / contraction pad 14 from a material having flexibility and elasticity, expansion is achieved by the pressure of introduction of a fluid such as air. On the other hand, the contraction uses the contraction force of the material constituting the expansion / contraction pad 14 to return from the expanded state, and thus no extra power is required.

  The pad base 16 is a support member having a role of supporting and positioning the expansion / contraction pad 14. In the case of the pad base 16 according to the present embodiment, a fluid introduction path 18 for introducing a fluid between the pad base 16 and the expansion / contraction pad 14 is formed while the surface on which the expansion / contraction pad 14 is disposed is made flat. ing. Further, in the present embodiment, the pad unit 12 and the dispensing unit 24 are arranged adjacent to a narrow space. For this reason, a recess 20 is formed on the back surface of the pad base 16 to form an escape for avoiding contact with the feed roller 26 in the feeding unit 24.

  In the pad unit 12 of the present embodiment, the expansion / contraction pad 14 is divided into a plurality of (two in the example shown in FIG. 2) blocks. The expansion / contraction pad 14 may be divided by physically separating the sheets constituting the expansion / contraction pad 14. In the present embodiment, the partition plate 22 for suppressing the expansion of the expansion / contraction pad 14 is arranged on the pad base 16. Thus, the expansion / contraction pad 14 is divided. A fluid introduction path 18 is formed in each of the divided regions of the expansion / contraction pad 14, and each of the divided regions is configured to be individually scalable.

  The supply unit 24 is an element that feeds and winds the cleaning cloth 30 pressed against the blanket cylinder 50 via the pad unit 12 described above. Specifically, it includes a delivery roller 26 and a take-up roller 28. With such a configuration, the cleaning cloth 30 wound around the delivery roller 26 can be wound by the winding roller 28 with use.

  In the present embodiment, both the feed roller 26 and the take-up roller 28 are divided according to the number of blocks of the divided expansion / contraction pad 14 (two in this embodiment). When the cleaning cloth 30 is supplied by a set of the feed roller 26 and the take-up roller 28, only one of the expansion and contraction pads 14 expands, and when the cleaning cloth 30 is pressed against the blanket cylinder 50, the rotation of the blanket cylinder 50 causes The pulling force acts only on the pressed part. Therefore, there is a possibility that the cleaning cloth 30 may be twisted. On the other hand, when the feed roller 26 and the take-up roller 28 are divided according to the number of blocks and the width of the expansion / contraction pad 14, the cleaning cloth 30 will not be twisted due to friction at the time of pressing. The supply and winding of the cleaning cloth 30 can be stabilized.

  Further, as shown in FIG. 6, the feeding unit 24 arranges the intermediate plate 32 between the adjacent rollers for the feed roller 26 and the take-up roller 28 so as to divide the rotation axis. I have. With such a configuration, it is possible to rotate one of the delivery roller 26 and the take-up roller 28 and the other delivery roller 26 and the take-up roller 28 individually. Further, the exchange of the cleaning cloth 30 can be performed individually by one of the feed roller 26 and the take-up roller 28 and the other feed roller 26 and the take-up roller 28. Further, the support shaft can be stabilized by shortening the rotation axis of each roller.

  Further, as described above, in the blanket cylinder cleaning device according to the present embodiment, the delivery roller in the dispensing unit is arranged close to the back surface of the pad unit, and the installation space is reduced. By bringing the delivery roller close to the pad unit so that a part of the cleaning cloth wound on the delivery roller enters the recess provided on the back surface of the pad base, the blanket cylinder cleaning device can be arranged in a narrow space. become.

  The frame 34 is an element that plays a role of positioning and supporting the pad unit 12 and the supply unit 24. In the present embodiment, as shown in FIG. 1, the pad unit 12 and the delivery roller 26 of the supply unit 24 are arranged so as to be located on a straight line extending in the radial direction from the center O of the blanket cylinder 50. The take-up roller 28 is arranged at the lower part of the. The frame 34 is disposed so as to engage with the pad base 16 of the pad unit 12, the feed roller 26, and the side surface of the take-up roller 28. Since the pad base 16 and the frame 34 are directly fastened, the rigidity of the entire apparatus can be increased.

[effect]
According to the blanket cylinder cleaning device 10 having such a configuration, as shown in FIG. 9, when two printing patterns (pattern A and pattern B) are formed in the blanket cylinder 50 in the longitudinal direction, one of them is used. It is assumed that dust or dirt such as paper dust adheres to the print pattern. In such a case, only the expansion / contraction pad 14 corresponding to the side on which dust or dirt such as paper powder is attached can be inflated, and the cleaning cloth 30 can be pressed against the area to perform wiping. For this reason, the line on the side where the cleaning cloth 30 is not pressed is not affected, and the product can be manufactured. Thus, productivity, that is, yield can be improved. The pattern A and the pattern B may be the same or different.

[Method]
In the blanket cylinder cleaning device 10 having such a configuration, the blanket cylinder 50 is cleaned as follows. First, the cleaning cloth 30 is set. The set of the cleaning cloth 30 guides the cleaning cloth 30 drawn from the delivery roller 26 along the contact route of the expansion / contraction pad 14 in the pad unit 12 to the winding roller 28. Here, the cleaning cloth 30 may be one that has been impregnated with the cleaning liquid in advance, or one that sprays the cleaning liquid on the cleaning cloth 30 at a predetermined timing. In this embodiment, a cleaning cloth 30 of a type impregnated with a cleaning liquid is used. This is because a space for providing a device for applying the cleaning liquid is omitted.

  When printing is performed via the blanket cylinder 50, in this embodiment, as shown in FIG. 9, two print patterns (pattern A and pattern B) are formed along the longitudinal direction of the blanket cylinder 50. In such a case, when dust or dirt is attached to only one of the print patterns, the expansion / contraction pad 14 at a position corresponding to the blanket cylinder 50 on the side to which the dust or dirt is attached is inflated to remove dust. And dust. The dust may be wiped by repeatedly pressing the expansion / contraction pad 14 intermittently.

  According to such a method, only one of the two print patterns formed on the blanket cylinder 50 is wiped. Therefore, the print pattern on the side not wiped is established as a product, and the yield can be improved. When dust or dirt is attached to both of the two print patterns, the two expanding / contracting pads 14 may be inflated at the same time to wipe off the dirt and dust.

  Here, the detection of adhesion of dust or dirt to the print pattern may be performed visually, or as illustrated in FIG. 8, the print surface of the print paper is imaged through an image pickup device 36 such as a camera. The analysis may be performed by analyzing the print surface. When it is determined that dust or dirt is present on the print surface, a print pattern on the dirt side is indicated and an alarm is issued. After the alarm, the operator may automatically or manually inflate the expansion / contraction pad 14 corresponding to the side determined to be contaminated, and wipe off dirt and dust.

[Modification]
In the above embodiment, the expansion / contraction pad 14 is divided into two in the pad unit 12. However, the number of divisions of the expansion / contraction pad can correspond to the number of print patterns transferred to the blanket cylinder 50. For example, when the number of print patterns is three, the number of divisions of the expansion / contraction pads in the pad unit 12 can be three as shown in FIG.

  In the above-described embodiment, the pad unit 12 is described as adopting the expansion / contraction pad 14 on the premise of miniaturization. However, the pad for pressing the cleaning cloth 30 against the blanket cylinder 50, which is divided into a plurality of blocks and can be operated for each block, includes a cam and a pad as described in the section of the background art. A pad having a mechanism for pressing with a rod of a cylinder or the like may be used. This is because, even with the pad unit having such a configuration, the blanket cylinder for printing a plurality of print patterns can achieve the effect of suppressing the occurrence of waste paper.

10 blanket cylinder cleaning device, 12 pad unit, 14 expansion pad, 16 pad base, 18 fluid introduction path, 20 recess, 22 partition Plate 24, Feeding unit 26 Feed roller 28 Winding roller 30 Wash cloth 32 Medium plate 34 Frame 50 Blanket Torso.

Claims (6)

A cleaning device having a pad for pressing a cleaning cloth against a blanket cylinder of a rotary printing press,
The pad is arranged along a longitudinal direction of the blanket cylinder, and is divided so as to form a plurality of blocks along the longitudinal direction.
The blanket cylinder cleaning device, wherein the blocks are individually operable.   The apparatus according to claim 1, wherein the pad is an expansion / contraction pad.   The pad forms the block by dividing the expansion / contraction portion of a single expansion / contraction pad, and fastens a frame body by fastening a pad base which is a support plate of the pad and a side plate supporting the roller. The blanket cylinder cleaning apparatus according to claim 2, wherein the apparatus is configured.   The blanket cylinder cleaning device according to any one of claims 1 to 3, wherein the cleaning cloth is provided for each of the corresponding blocks in accordance with a division width of the block.   The blanket cylinder cleaning apparatus according to claim 4, wherein the roller around which the cleaning cloth is wound has an intermediate plate between adjacent rollers. A method for cleaning the blanket cylinder by pressing a cleaning cloth through a expansion pad against a blanket cylinder of a rotary printing press,
Dividing the expansion and contraction pad into a plurality of blocks along the longitudinal direction of the blanket cylinder,
A blanket cylinder cleaning method, characterized in that the cleaning cloth is pressed by expanding the expansion / contraction pad of the block corresponding to a wiping point along the longitudinal direction of the blanket cylinder.

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