JP2008195048A - Cylinder cleaning device for printing machine - Google Patents

Abstract

An object of the present invention is to provide a printing cylinder cleaning apparatus equipped with a mechanism for rotating a round bar scraper after cleaning a printing cylinder and cleaning dirt substances adhering to the scraper with a rotating roll brush, and mounting the intermittent feed mechanism on the scraper. Remove dirt substances deposited on the bracket to reduce the wear of the bracket and increase the frequency of replacement.
As a means of extending the maintenance interval of the cleaning device and consequently reducing the running cost, an intermittent feed mechanism is attached to the scraper 5, the minimum rotation necessary for cleaning the scraper 5 is given to the scraper 5, and the bracket 6 The service life was greatly extended.
[Selection] Figure 5

Description

  The present invention relates to a printing cylinder cleaning device in a printing press.

  A conventional printing cylinder cleaning device using a roll brush is provided with a supply means for spraying cleaning liquid on the roll brush, spraying the cleaning liquid on the roll brush to wet it, and rubbing the cleaning liquid against the cylinder surface by rotating the roll brush. The surface of the printing cylinder is cleaned by a method of swelling or dissolving the adhering ink or paper powder and scraping it off. The ink and paper dust stains scraped off adhere to the tip of the roll brush, and a scraper is pressed against the scraper to remove it. When the brush tip passes through the scraper, the dirt is bounced off and collected in the drain pan together with the cleaning waste liquid.

  Such a device requires that the roll brush be kept clean, since the ability to scrape dirt material from the printing cylinder will be reduced if the brush is dirty. Therefore, in a roll brush type cylinder cleaning device, it is necessary to scrape off dirt adhering to the brush with a scraper. Therefore, conventionally, in order to clean the brush, the brush is self-cleaned. As a self-cleaning step of the brush before and after cleaning, and during cleaning, the brush is pulled away from the printing cylinder and idled, and cleaning liquid is sprayed. The dirt on the brush tip is blown away with a scraper, and the brush is cleaned.

  However, the scraper has a portion that is not in contact with the brush, and the portion that is not in contact with the brush is merely washed away by the flow of the cleaning liquid. For this reason, the dirt substance made up of ink residue or paper powder adhering at a portion not in contact with the scraper brush gradually accumulates and becomes icicle-like during long-term use. The icicles due to such a dirt substance will eventually grow thicker and longer and will impede the brushing away of the dirt substance on the brush. At the site of use, in order to maintain the function of the printing cylinder cleaning device, maintenance work such as periodically cleaning the scraper is required.

  In the maintenance work, the heavy cleaning device is removed from the narrow printing machine space, the cover of the device is disassembled, and the scraper is cleaned. This work is a work in the ink stain, and the working environment is bad.

A scraper having a square or spiral cross section is formed into a round bar shape, and the scraper is cleaned by rotating the scraper and rubbing the entire surface of the scraper with a brush containing a cleaning liquid. As a result, the scraper function can be prevented from being lowered, the number of maintenance operations can be reduced, and the brush self-cleaning time can be shortened.
(For example, refer to Patent Document 1.)
Japanese Patent Application No. 2005-312002

  In the method of rotating the round scraper to remove the dirt on the scraper, the multiple brackets that hold the round scraper rotate the scraper for a long time, and the scraper with dirt on it wears the bearings of the bracket. Had to be replaced. If the scraper is cleaned each time after washing and cleaning the printing cylinder, only a small amount of dirt is accumulated and the mixed cleaning liquid is not vaporized, so that the dirt substance is easy to clean. In that case, it is possible to clean the brush tip of the rotating brush only by passing the dirt substance. Therefore, the scraper can be cleaned without rotating once. There is a conventional method in which a roll brush and a scraper are connected by a gear and the scraper is rotated by the rotational force of the roll brush. In this example, in order to reduce the rotation of the scraper, it is only necessary to increase the reduction ratio. The present invention provides a mechanism for reducing scraper rotation in order to reduce bracket wear.

  The present invention provides an apparatus for removing a dirt substance accumulated on a scraper by attaching an intermittent feed mechanism to the scraper in order to reduce the wear of the bracket and extend the replacement frequency.

  By practicing the present invention, the wear of the bracket is greatly reduced, so that the period for periodically replacing the bracket is extended, freeing up from heavy work and reducing costs.

  FIG. 1 is a cross-sectional view of a printing press cylinder cleaning apparatus, and illustrates that it is being cleaned. The printing cylinder 1 rotates in the direction of the arrow 14. That is, the roll brush 4 is rotated in the opposite direction to the printing cylinder 1 in order to wipe off the dirt. The roll brush 4 of the printing cylinder cleaning device 2 rotates in the direction of the arrow 15. The cleaning liquid 13 discharged from the cleaning liquid supply means adheres to the bristles 3 of the brush. The bristles 3 of the brush come into contact with the surface of the printing cylinder 1 and scrape off dirt substances with the bristles 3. When the dirt substance attached to the brush tip 3 passes through the round bar scraper 5, it is blown off like a dirt substance splash 10. The fouled dirt material is deposited as a deposit 16 on the bottom of the drain pan. After cleaning, the dirt substance 11 adheres under the scraper 5 in an icicle shape. If the dirt substance 11 is not cleaned and removed, it will become larger and will obstruct the path of the dirt substance splash 10. If it becomes so, it will become impossible to remove the dirt substance which adhered to the brush tip 3, and the cleaning effect will also fall.

  2 is a cross-sectional view taken along the line AA in FIG. The rotation of the roll brush is driven by a motor 9 via a belt 12. The round bar scraper 5 is held by a plurality of brackets 6.

  FIG. 5 shows the relationship between the bracket and the round bar scraper. The bracket 6 is notched on the brush side so that the round bar scraper 5 is brought into contact with the brush tip 3.

3 and 4 illustrate the present invention.
If it demonstrates in FIG. 3, the deformation | transformation type | mold of the Geneva mechanism will be attached to the opposite side of the motor 9 with the washing | cleaning apparatus 2. FIG. A shaft 22 is screwed into the end of the roll brush 4. A drive wheel 20 is attached to the shaft 22 via a unidirectional rotary bearing 21. A drive pin 23 is fixed to the drive wheel 20 with a screw 17. A driven wheel 19 is attached to the round bar scraper 5 via a key 18.

  4 is a view taken in the direction of arrow B in FIG. The roll brush 4 rotates in the direction of the arrow 24. When rotating in this direction, the one-way bearing 21 is engaged with the shaft 22 and the drive wheel 20 is rotated. The direction is opposite to the arrow 15 in FIG. When rotating in the direction of the arrow 15, the one-way bearing 21 does not mesh with the shaft 22 and the drive wheel 20 does not rotate. The driven wheel 19 is composed of a plurality of tooth tips on the outer periphery. In the figure, there are 8 tooth tips. When the drive pin 23 is engaged with the tooth and the roll brush 4 rotates once, the scraper 5 rotates by one tooth of the driven wheel 19, that is, 1/8. For example, when the scraper 5 is rotated three times, the roll brush 4 may be rotated 24 times. The number of rotations of the scraper 5 depends on the accumulation state of the dirt substance. The accumulated dirt substance by the rotation of the scraper 5 comes into contact with the bristles 3 of the brush, and thus is blown off by the rotation of the roll brush 4.

  FIG. 5 shows a state where the scraper 5 is contaminated with a single cylinder cleaning. FIG. 6 shows a state in which the scraper is rotating and the dirt substance 11 is in contact with the hair tip 3 of the brush.

  Although not shown, it is possible to use an air cylinder or a ratchet mechanism as an intermittent motion method.

  In the printing cylinder cleaning apparatus having a function of automatically cleaning the scraper, the present invention can significantly extend the life of the bearing portion of the bracket that holds the scraper that is most concerned about durability. . As a result, the maintenance interval of the cleaning device was extended, and as a result, the running cost was reduced. In addition, since the scraper can be cleaned more than ever, the cleaning effect has been improved.

  It is a cross-sectional view of a printing cylinder cleaning device.   It is AA sectional drawing of FIG. It is a conventional device.   It is a figure regarding this invention, and is the figure which attached the intermittent feeding mechanism to the roll brush and the scraper.   FIG. 4 is a view related to the present invention and is a view taken in the direction of arrow B in FIG. It is a figure by which a driven wheel is rotated intermittently with a drive pin.   It is an enlarged view of a bracket part. A notch 26 of the bracket is shown.   This shows a state in which a dirt substance adhering to the scraper is in contact with the tip of the brush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing cylinder 2 Printing cylinder washing | cleaning apparatus 3 Brush tip 4 Roll brush 5 Round bar-shaped scraper 6 Bracket 7 Cleaning liquid supply means 8 Drain pan 9 Motor 10 Spatter of dirt substance 11 Dirt substance 12 deposited in icicles Belt 13 Washing liquid 14 Rotating direction of printing cylinder 15 Rotating direction of roll brush 16 Accumulated dirt material 17 Screw 18 Key 19 Driven wheel 20 Drive wheel 21 Unidirectional rotating bearing 22 Shaft 23 Pin 24 Rotating direction of roll brush. During scraper cleaning 25 Scraper rotation direction 26 Notch in bracket

Claims (2)

  A roll brush that scrapes dirt from the printing cylinder, a means for supplying cleaning liquid, a round bar-shaped scraper that removes dirt and cleaning liquid adhering to the roll brush, and dirt and cleaning liquid bounced by the round bar-shaped scraper are collected. In the printing cylinder cleaning device, which consists of a drain pan and has a mechanism that automatically cleans dirt adhering to the scraper with a roll brush by rotating a round bar-shaped scraper, an intermittent feed mechanism is incorporated in the rotation of the scraper. A printing cylinder cleaning device. 2. The printing cylinder cleaning apparatus according to claim 1, wherein a driving wheel having a pin fixed thereto is attached to the roll brush, a driven wheel having a tooth cut on the outer periphery thereof is attached to the round bar scraper, and the pin and the tooth are engaged with each other. 2. A printing cylinder cleaning apparatus according to claim 1, further comprising a mechanism for rotating the rod-shaped scraper intermittently.

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