JP2011168025A - Cylinder cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a device so that na installation space can be minimized when the device is installed in a printer and, and to maintain high mechanical rigidity. <P>SOLUTION: In a cylinder cleaning device, a washing cloth 9 of almost the same width with the length of a cylinder to be cleaned is fed to a winding roll 11 from a supply roll 10, then the device is forwarded toward the cylinder and cleans a cylinder surface by pushing a washing cloth to the cylinder 1, 2 by pads 17, 18. The pad 17 is supported to the first support bar 19 while the pad 18 is supported to the second support bar 20 and the first support bar is of a hollow structure 23 and a part of a wall 21 constituting the hollow structure has a recess in which a part of a profile of the supply roll can be contained, and the second support bar is of a hollow structure 24 and a part of a wall 22 constituting the hollow structure has a recess in which a part of the profile of the winding roll can be contained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cylinder cleaning device for cleaning a cylinder of a printing press such as a newspaper rotary printing press.

  A characteristic of newspaper printing is that a large amount of printing must be performed in a short time. For this reason, traditional newspaper printing factories are equipped with a rotary printing press (hereinafter referred to as “printing press”) designed exclusively for newspaper printing and its related equipment.

  In most conventional printing presses, the plate cylinder can be loaded with four pages of newspaper in the width direction of the printing paper and two pages in the rotation direction of the plate cylinder. With such a plate cylinder, the newspaper page of 8 pages is printed each time the plate cylinder makes one revolution. The number of pages in the rotational direction of the plate cylinder is a redundant part for realizing high-speed printing. In recent years, various proposals have been made to eliminate these redundant portions.

  For example, Patent Document 4 shows an example of a printing machine of a type called 4 × 1 (four by one). In the printing press shown here, the diameter of the plate cylinder is halved compared to the diameter of the blanket cylinder. When the diameter of the plate cylinder is halved, the area of the plate is halved. When trying to maintain the same printing speed as that of a conventional printing press, the rotational speed of the plate cylinder is doubled. However, since the area of the plate is halved, the material consumption of the plate, which is a consumable item, can be greatly reduced. Further, when the diameter of the plate cylinder is reduced, the outer dimensions of the printing press are reduced.

  On the other hand, printing includes a process called cylinder cleaning. This step is a step of cleaning the surface of the blanket cylinder at the stage of completion of printing (end of printing). The cylinder cleaning process is executed by a cylinder cleaning apparatus incorporated in the printing press.

  Patent Document 1 discloses a conventional typical cylinder cleaning apparatus. The cylinder cleaning device includes a supply roll that supplies cleaning cloth, a take-up roll that winds the cleaning cloth, and a cleaning pad that presses the cleaning cloth against the outer periphery of the cylinder, and is integrated into the printing machine as a component of the printing machine. This type of cylinder cleaning apparatus is difficult to be incorporated into a printing machine as disclosed in Patent Document 4. The reason is that since the external dimensions of the printing press have become smaller, it is not possible to secure a sufficient space for installing the conventional cylinder cleaning device inside the printing press.

  In view of this, there has been proposed a dual head type cylinder cleaning apparatus that simultaneously cleans two different cylinders with a single cleaning apparatus, as disclosed in Patent Document 2 and Patent Document 3. Compared with the cylinder cleaning device disclosed in Patent Document 1, this dual head type cylinder cleaning device requires a small space for installation.

  The apparatus disclosed in Patent Document 2 can be applied to a commercial printing machine that can clean the impression cylinder and the blanket cylinder at the same time and has a narrow paper width. However, when the paper width is wide like a newspaper printer, sufficient reinforcement is necessary. A newspaper printer has a paper width of about 1600 mm. The length of the blanket cylinder is longer than the paper width to be printed. The cylinder cleaning device for cleaning the blanket cylinder must press the cleaning cloth against the entire blanket cylinder with uniform pressure. Therefore, the cylinder cleaning device is required to have high mechanical rigidity that does not cause bending when the cleaning cloth is pressed against the blanket cylinder.

  The cylinder cleaning device disclosed in Patent Document 3 is a cleaning device that can be applied to a newspaper printer. In particular, it is suitable for application to a printing machine in which two blanket cylinders shown in Patent Document 4 are arranged close to each other. However, the dimensions are large as it is.

  In the case of a printing press in which the diameter of the plate cylinder is reduced, for example, the printing press of Patent Document 4, all the components of the printing press are close to the periphery of the blanket cylinder. Since the plate cylinder needs to be replaced on a daily basis, a sufficient working space is required around the plate cylinder.

JP 11-291463 A Japanese Patent Laid-Open No. 02-131942 WO2006 / 009507 Special table 2006-520707

  An object of the present invention is to realize a cylinder cleaning device that is miniaturized so that the installation space is small when it is incorporated in a printing press. Another object of the present invention is to realize a cylinder cleaning device that retains high mechanical rigidity even after being downsized.

  In order to solve the above problems, a cylinder cleaning device according to the present invention is directed to a supply roll for supplying cleaning cloth, a winding roll for winding the cleaning cloth supplied from the supply roll, and from the supply roll to the winding roll. A cloth feed mechanism that feeds the cleaning cloth, a first pad that presses the cleaning cloth against the first cylinder, a second pad that presses the cleaning cloth against the second cylinder, and a first pad that supports the first pad Cylinder cleaning provided with a support bar, a second support bar for supporting the second pad, and an advancing / retreating mechanism for advancing / retreating the first pad and the second pad relative to the first and second cylinders In the apparatus, the first bar has a hollow structure, and a part of a wall forming the hollow structure includes a recess combined with the outer shape of the supply roll, and the second bar has a hollow structure and has a hollow structure. Form Part of the wall is characterized by comprising a recess combine the outer shape of the take-up roll.

  Another cylinder cleaning device of the present invention includes a supply roll for supplying cleaning cloth, a winding roll for winding the cleaning cloth, a winding drive mechanism for winding the cleaning cloth on the winding roll, a supply roll, and a winding roll. In a cylinder cleaning apparatus comprising a resilient cleaning pad for pressing a cleaning cloth against the surface of the cylinder and a support bar for supporting the cleaning pad, the support bar has a hollow structure. In addition, the hollow structure is provided with a recess in a part of the outer shape, and the recess has a shape that accommodates a part of the outer shape of the supply roll or the winding roll.

  In the cylinder cleaning device according to the present invention, the support bar has a hollow structure to achieve high rigidity and light weight. Further, since a part of the wall forming the hollow structure is provided with a recess combined with the outer shape of the roll of the cleaning cloth, the space size of the cylinder cleaning device is reduced. Further, the support bar and the roll of the cleaning cloth can be densely arranged without reducing the rigidity of the support bar.

FIG. 1 is a side view of a cylinder cleaning apparatus according to a first embodiment of the present invention. FIG. 2 is a side view showing a state during cylinder cleaning. FIG. 3 is a side view showing a first modification of the support bar. FIG. 4 is a side view showing a second modification of the support bar. FIG. FIG. 5 is a side view of the cylinder cleaning apparatus according to the second embodiment of the present invention. FIG. 6 is a plan view of one side of the cylinder cleaning device of the present invention as viewed from above.

(First embodiment)
FIG. 1 shows a first embodiment of the present invention. Reference numeral 1 denotes a first cylinder. Reference numeral 2 denotes a second cylinder. The first cylinder 1 and the second cylinder 2 correspond to a blanket cylinder in a newspaper rotary press, and both rotate counterclockwise. Both ends of the first cylinder 1 and the second cylinder 2 are supported on both sides by a frame 40 (one side is shown in FIG. 6) constituting the printing press and rotate.

  Reference numeral 3 denotes a cylinder cleaning device. The cylinder cleaning device 3 is disposed between the first cylinder 1 and the second cylinder 2 and close to each cylinder. The cylinder cleaning device 3 is supported at a predetermined position on the frame 40 of the printing press supporting the first cylinder 1 and the second cylinder 2. Reference numeral 4 denotes a rail fixed to the frame 40. 5 is a plate. The plate 5 is supported on the rail 4 via a roller 6. The plate 5 is movable along the longitudinal direction of the rail 4.

  The frame 40 exists on both sides of the cylinders 2 and 3 in order to support the cylinders 2 and 3 at both ends, but a pair of rails 4 and plates 5 also exist on both sides in the same manner. 7 is an air solenoid. The air solenoid 7 operates as an advance / retreat operation mechanism. The air solenoid 7 has a main body fixed to the same frame 40 as the rail 4. The air solenoid 7 is connected to the plate 5 via a link 8. When the air solenoid 7 is operated, the plate 5 moves along the rail 4. As a result, the plate 5 moves back and forth with respect to the first cylinder 1 and the second cylinder 2. The state shown in FIG. 1 shows the retracted position.

  9 is a cleaning cloth, 10 is a supply roll, and 11 is a winding roll. The cleaning cloth 9 is a cloth having substantially the same width as the cylinders 1 and 2. The supply roll 10 is obtained by winding the cleaning cloth 9 around the winding core 12 in a long length. The winding roll 11 winds the cleaning cloth 9 supplied from the supply roll 10 around the winding core 13. As the cleaning process proceeds, the cleaning cloth 9 of the supply roll 10 is used and the diameter of the supply roll 10 decreases while the diameter of the take-up roll 11 increases.

  The supply roll 10 is supported on the plate 5 by a supply roll holder 14, and the take-up roll 11 is supported on the plate 5 by a take-up roll holder 15. The winding roll holder 15 includes a cleaning cloth feed mechanism 16. The cleaning cloth 9 is sent from the supply roll 10 toward the take-up roll 11, and the cleaning cloth feed mechanism 16 is a mechanism that sends a predetermined length of cleaning cloth as necessary. The cleaning cloth feed mechanism 16 may be a dedicated electric motor, or may be realized by a mechanical mechanism using the advance / retreat operation of the plate 5.

  Reference numeral 17 denotes a first pad, and reference numeral 18 denotes a second pad. The pads 17 and 18 are semi-cylindrical elastic pads that are somewhat longer than the cleaning cloth 9. The cleaning cloth 9 passes through the cylindrical outer periphery of the pads 17 and 18. When the plate 5 moves forward toward the cylinders 1 and 2, the pads 17 and 18 press the cleaning cloth 9 against the cylinders 1 and 2 by a cylindrical outer periphery.

  Reference numeral 19 denotes a first support bar, and reference numeral 20 denotes a second support bar. The support bars 19 and 20 are located between a pair of opposed plates 5, and pads 17 and 18 are attached thereto, respectively. The support bars 19 and 20 are required to have sufficient rigidity to support the pads 17 and 18 so as not to bend when the pads 17 and 18 press the cleaning cloth 9 against the cylinders 1 and 2.

  In FIG. 1, the support bar 19 has a hollow structure as shown by a cross-sectional shape. Reference numerals 21 and 22 denote recesses provided in the support bars 19 and 20. The depressions 21 and 22 form part of the walls of the hollow structures 23 and 24 of the support bars 19 and 20. The shape of the recesses 21 and 22 is a shape that can accommodate a part of the outer shape of the supply roll 10 and the take-up roll 11. The support bars 19 and 20 have a shape surrounding the outer periphery of the supply roll 10 and the take-up roll 11 by the depressions 21 and 22.

  FIG. 2 shows a forward position of the cylinder cleaning device 3 shown in FIG. The plate 5 advances toward the cylinders 1 and 2 along the rail 4 by the operation of the air solenoid 7. When the plate 5 moves forward, the pads 17 and 18 press the cleaning cloth 9 against the cylinders 1 and 2.

  The length of the support bar 19 is longer than the width of the cleaning cloth 9. In a newspaper printer, it is 1600 mm or more. Therefore, the cross-sectional structure of the support bars 19 and 20 immediately reflects the weight of the support bars 19 and 20. The weight of the support bars 19 and 20 has a great influence on the overall weight of the cylinder cleaning device 3. Since the support bars 19 and 20 have a hollow structure, the weight is reduced.

  Further, the recesses 21 and 22 of the support bars 19 and 20 do not impair the rigidity of the support bars 19 and 20, and the cylinder cleaning device 3 can be downsized when combined with the rolls 10 and 11 of the cleaning cloth. In the structure shown in FIG. 1, only the cleaning cloth 9, the pads 17 and 18, the support bars 19 and 20, and the cleaning cloth rolls 10 and 11 are placed in the space between the pair of plates 5. If these constituent elements are densely arranged, a large space can be secured around the cylinders 2 and 3.

(First modification)
FIG. 3 shows a first modification of the present invention. In FIG. 3, the cross section of the first support bar 19 is asymmetric with respect to the first pad 17. That is, when the support bar 19 and the pad 17 are combined, the support bar 19 may not be symmetrical with respect to the mounting position of the pad 17.

(Second modification)
FIG. 4 shows a second modification. In the example shown in FIG. 1, there is only one hollow structure 23 of the support bar 19, but in the example of FIG. 4, the hollow structures are divided into three, 25, 26, and 27 by the partitions 32 and 33. I know. The number of divisions of the hollow structure is not limited to three.

(Second Embodiment)
FIG. 5 shows a second embodiment of the present invention. The printing machine shown in FIG. 1 and the printing machine shown in FIG. 5 are different in the distance between the cylinder 1 and the cylinder 2. The distance between the cylinder 1 and the cylinder 2 varies depending on the printer model. The example shown in FIG. 1 is narrow, and the example shown in FIG. 5 is wide. When the distance between the cylinders 1 and 2 to be cleaned is large, the cleaning cloth rolls 10 and 11 combined with the recess 21 of the support bar 19 or the recess 22 of the support bar 20 may be either one. However, it is desirable to combine at least one of the support bar 19 and the support bar 20 with the roll 10 or 11 of the cleaning cloth.

  The present invention is not limited to the examples described above. Although FIG. 1 has been described on the assumption that the shapes of the support bars 19 and 20 are the same or symmetric, they may have different shapes depending on the printing press. Further, the support bars 19 and 20 are structured to form the hollow structures 23 and 24, and the portions to which the pads 17 and 18 are attached and the portions to form the recesses 21 and 22 have been described as an integral structure. As shown in FIG. 4, the first portion 28 for attaching the pad 17 and the second portion 29 for forming the recess 21 may be connected by joints 30 and 31.

DESCRIPTION OF SYMBOLS 1 1st cylinder 2 2nd cylinder 3 Cylinder washing | cleaning apparatus 4 Rail 5 Plate 6 Roller 7 Air solenoid 8 Link 9 Cleaning cloth 10 Supply roll 11 Winding roll 12 Winding core 13 Winding core 14 Supply roll holder 15 Winding roll Holder 16 Cleaning cloth feed mechanism 17 1st pad 18 2nd pad 19 1st support bar 20 2nd support bar 21, 22 Indentation 23, 24 Hollow structure

Claims (4)

In order to clean the surface of the cylinder, a cleaning cloth having a width substantially the same as the length of the cylinder, a supply roll for supplying the cleaning cloth, a winding roll for winding the cleaning cloth supplied from the supply roll, and a winding roll from the supply roll A cloth feed mechanism that feeds the cleaning cloth toward the take-up roll, a first pad that presses the cleaning cloth against the first cylinder, a second pad that presses the cleaning cloth against the second cylinder, and the first pad A first support bar that supports the second pad, a second support bar that supports the second pad, and an advancing / retracting operation mechanism that causes the first pad and the second pad to move back and forth with respect to the first and second cylinders In the cylinder cleaning device with
The first support bar has a hollow structure, and a part of a wall forming the hollow structure includes a recess for accommodating a part of the outer shape of the supply roll,
The cylinder cleaning apparatus, wherein the second support bar has a hollow structure, and a part of a wall forming the hollow structure is provided with a recess for accommodating the outer shape of the winding roll.   2. The cylinder cleaning device according to claim 1, wherein the first support bar or the second support bar has a hollow cross-sectional shape that is asymmetric with respect to a pad mounting portion.   The cylinder cleaning apparatus according to claim 1, wherein at least one of the first support bar and the second support bar has a hollow structure divided into a plurality of partitions by a partition. In order to clean the surface of the cylinder, a cleaning cloth having a width substantially the same as the length of the cylinder, a supply roll for supplying the cleaning cloth, a winding roll for winding the cleaning cloth supplied from the supply roll, and a winding roll from the supply roll A cloth feed mechanism that feeds the cleaning cloth toward the take-up roll, a first pad that presses the cleaning cloth against the first cylinder, a second pad that presses the cleaning cloth against the second cylinder, and the first pad A first support bar that supports the second pad, a second support bar that supports the second pad, and an advancing / retracting operation mechanism that causes the first pad and the second pad to move back and forth with respect to the first and second cylinders In a cylinder cleaning apparatus equipped with
At least one of the first support bar and the second support bar has a hollow structure, and a part of the wall forming the hollow structure has a recess for accommodating the outer shape of the supply roll or the winding roll. A cylinder cleaning device.

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