JP2010082834A - Cylinder washing means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide cylinder washing combining a brush and a washing cloth which maintains uniformity in control and supply of the amount of the washing liquid and which also enables secure and brief washing. <P>SOLUTION: The cylinder washing means includes: a washing cloth unit 4 which wipes off the surface of a cylinder 1 by pressing a washing cloth 6 onto the outer circumference surface of the cylinder with a washing pad 9 and then winds up the used washing cloth onto a take-up roll 8; a brush unit 5 with a rotating brush 10 which contacts the outer circumference surface of the cylinder on the upstream side of the washing cloth unit in conjunction with the rotational direction of the cylinder; a washing liquid supply means 13 provided with a spray nozzle comprised of a first nozzle 14 and a second nozzle 15 which spray the washing liquid on the rotating brush of the brush unit as a spray pattern in a fan-like form. Thus the washing liquid is provided as a spray pattern a fan-like form and evenly provided on the brush, enabling the supply of the washing liquid to be controlled in a sufficient range. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder cleaning device that cleans a cylinder that constitutes a printing machine such as an offset printing machine, and more particularly to a cylinder cleaning device that removes ink and paper dust adhering to the surface of the cylinder.

Although not limited to an offset printing machine, in a printing machine represented by an offset printing machine, a cylinder cleaning process is included in the operation process. The cylinder cleaning process is a process of removing ink and paper dust adhering to the cylinder. The cylinder cleaning process can be performed manually by an operator. The cylinder is manually cleaned by wiping the surface of the cylinder with the cleaning cloth in the cleaning cloth while rotating the cylinder at a low speed. However, in practice, it is rare to manually clean the cylinder. Since the printing press has a large number of cylinders, the printing press includes a cylinder cleaning device for the purpose of shortening the time of the cylinder cleaning process or ensuring the safety of the operator. The cylinder cleaning device is integrally incorporated as a component of the printing press, and can automatically clean the cylinder as necessary.
There are several types of cylinder cleaning devices with different structures. One is a form using a cleaning cloth, and the other is a form using a brush. In the type using the cleaning cloth, the cylinder is cleaned by pressing the cloth soaked with the cleaning liquid against the outer periphery of the cylinder. In the type using a brush, the surface of the cylinder is rubbed with a rotating brush or a reciprocating brush, and at the same time, cleaning liquid and water are often supplied.
The purpose of the cylinder cleaning device using a cleaning cloth and the type of cleaning device using a brush are the same, but each has its own characteristics. Although the type using the cleaning cloth is suitable for wiping off ink or the like, there are cases where the foreign matter fixed integrally with the paper dust on the cylinder surface cannot be removed. The brush type is suitable for removing foreign substances, but a residue may remain on the cylinder surface.
Patent Document 1 describes a cylinder cleaning device in which a cleaning cloth and a brush are combined so as to operate in cooperation. The apparatus shown here has a rotating brush on the upstream side and a cleaning cloth on the downstream side in the direction of rotation of the cylinder. First, rub the surface of the cylinder with a rotating brush, and then wipe the cylinder surface with a cleaning cloth. The cleaning liquid is supplied near the rotating brush. The apparatus shown here has a problem in supplying the cleaning liquid, and the amount of the cleaning liquid in the portion where the brush and the cylinder are in contact is not controlled. The cleaning liquid is too much, too little, or uneven supply exists.
Patent Document 2 similarly shows a configuration of a cylinder cleaning device in which a brush and a cloth are combined. In the apparatus disclosed in Patent Document 2, the cleaning liquid is supplied to the portion of the cleaning cloth. However, in the apparatus shown here, too, the cleaning liquid is too much, too little, or uneven supply exists.
In both the apparatus shown in Patent Document 1 and the apparatus shown in Patent Document 2, the supply of the cleaning liquid is incompletely controlled. If there is too much cleaning liquid, and the cleaning liquid is a flammable solvent, there is a risk of ignition if it reaches the drying process while attached to the printing paper. In addition, if the cleaning liquid is water-soluble, it may cause the paper to break when it adheres to the printing paper. On the other hand, if the cleaning liquid is insufficient, the brush may be worn abnormally or the cylinder cleaning effect may not be obtained. As for the uneven supply of the cleaning liquid, problems of both excessive supply and insufficient supply of the cleaning liquid may occur at the same time. In addition, the uneven supply of the cleaning liquid takes time until the cleaning liquid is uniformly applied to the surface of the cylinder, so that it is necessary to reduce the rotational speed of the cylinder more than necessary, and the size of the cleaning apparatus is increased.
Patent Document 3 discloses a cleaning device of a type using only a brush. The apparatus shown here sprays the cleaning liquid, and the supply amount of the cleaning liquid can be controlled. However, since the type does not have a cleaning cloth, applicable printers are limited.

JP 59-178254 A JP 63-134245 A US2007 / 0033764A1

A conventional cylinder cleaning device combining a brush and a cleaning cloth has a problem that the control of the supply amount and the supply form of the cleaning liquid is incomplete, and the cylinder cannot be stably cleaned.
An object of the present invention is to provide a cylinder cleaning device capable of maintaining the control of the amount of cleaning liquid and the uniformity of supply in a cylinder cleaning combining a brush and a cleaning cloth and completing the cleaning reliably and in a short time. There is.

  In order to achieve the above object, a first aspect of the present invention provides a cylinder cleaning apparatus for cleaning the outer periphery of a cylinder of a printing press. The cleaning cloth is supplied from a supply roll, and the cleaning cloth supplied from the supply roll is used. A cleaning cloth unit including a winding roll for wiping the surface of the cylinder by urging the outer periphery of the cylinder and winding the cleaning cloth wiped off the surface of the cylinder, and the rotation direction of the cylinder A brush unit having a brush disposed upstream of the cleaning cloth unit and having the brush contact with the outer periphery of the cylinder; and a cleaning liquid supplying means for supplying a cleaning liquid to the brush of the brush unit; and the cleaning liquid supplying means A cleaning liquid supply source for supplying the cleaning liquid, and a control bar for passing or blocking the cleaning liquid supplied from the cleaning liquid supply source. And blanking, is characterized in that it comprises a spray nozzle for spraying the brush of the brush unit of the washing liquid that has passed through the control valve as a spray pattern fanned in the mist.

  According to a second aspect of the present invention, in the first aspect, a plurality of spray nozzles are arranged along a longitudinal direction of the brush, and a spray pattern of the spray nozzle intersects a spray pattern of an adjacent spray nozzle. It is characterized by.

  According to a third aspect of the present invention, in the first aspect, the brush of the brush unit is a cylindrical rotary brush, the rotation speed with respect to the surface of the cylinder is controllable, and the cleaning liquid supply means includes the The supply amount of the cleaning liquid can be controlled, and a control unit for controlling the rotation speed and the supply amount of the cleaning liquid is provided.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the control unit stores a plurality of patterns with the rotation speed of the rotating brush and the supply amount of the cleaning liquid as preset values.

  According to the first aspect of the present invention, the cleaning liquid is atomized and supplied as a fan-shaped pattern. With this fixed pattern, the cleaning liquid can be evenly supplied to the brush. Furthermore, the supply amount of the cleaning liquid can be controlled within a sufficient range.

  According to the invention of claim 2, the cleaning liquid is supplied in a uniform amount to the brush by spraying so that adjacent spray patterns intersect.

  According to the invention of claim 3, since the rotational speed of the rotary brush and the supply amount of the cleaning liquid are controlled, optimization in a wide range is possible according to the state of the printing machine and the printing target.

  According to the fourth aspect of the present invention, a frequently used pattern is stored in advance as a preset value, so that it is possible to realize a cylinder cleaning apparatus that can perform more rapid and reliable cleaning of the cylinder.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing the best mode of the present invention. Reference numeral 1 denotes a cylinder of a printing machine to be cleaned. The cylinder 1 rotates clockwise. 2 is the surface of the cylinder. 3 is a cylinder cleaning device. The cylinder cleaning device 3 is attached to a frame on which a support shaft of the cylinder 1 is provided. The cylinder cleaning device 3 includes a cleaning cloth unit 4 that cleans the cylinder 1 using a cleaning cloth, and a brush unit 5 that cleans the cylinder 1 using a brush.

  Reference numeral 6 shown in relation to the cleaning cloth unit 4 is a cleaning cloth. 7 is a supply roll. 8 is a winding roll. 9 is a cleaning pad. The cleaning cloth 6 is a nonwoven fabric having substantially the same width as the cylinder 1. The cleaning cloth 6 is supplied from the supply roll 7, passes between the cleaning pad 9 and the surface 2 of the cylinder 1, and reaches the winding roll 8. The cleaning cloth unit 4 moves forward and backward with respect to the cylinder 1 as a whole, or only the cleaning pad 9 moves forward and backward with respect to the cylinder 1 to press the cleaning cloth 6 against the cylinder 1 as necessary. The state shown in FIG. 1 shows a state where the cleaning pad 9 presses the cleaning cloth 6 against the surface 2 of the cylinder 1.

Reference numeral 10 shown in relation to the brush unit 5 is a rotating brush. The rotating brush 10 is a cylindrical brush having substantially the same length as the cylinder 1 and can be rotated clockwise. The rotating brush 10 can move back and forth with respect to the cylinder 1 as necessary, and can brush the outer periphery 2 of the cylinder 1. 11 is a scraper and 12 is a drain pan. The scraper 11 comes into contact with the outer periphery of the rotating rotary brush 10 and forcibly repels ink and paper powder captured by the rotary brush 10 from the surface 2 of the cylinder 1. The drain pan 12 is a container provided at the lower part of the rotating brush 10 and mainly receives ink and paper powder blown off by the scraper 11.
Reference numeral 13 denotes a cleaning liquid supply means. The cleaning liquid supply unit 13 includes a first nozzle 14. The cleaning liquid supply means 13 sprays the cleaning liquid on the outer peripheral surface of the rotating brush 10 as necessary.

  FIG. 2 shows the configuration of the cleaning liquid supply means 13. Reference numeral 16 denotes a spray bar. The spray bar 16 is a hollow tube, and the first nozzles 14 are attached along the rotating brush 10 at equal intervals. Reference numeral 17 denotes a spray pattern of the first nozzle 14. The cleaning liquid sprayed from the first nozzle 14 has a mist shape and spreads in a fan shape. The spray pattern 17 is such that it partially overlaps the adjacent first nozzle 14. The cleaning liquid sprayed from the first nozzle 14 wets the outer periphery of the rotating brush 10 almost evenly.

  An electromagnetic valve 18 is a control valve. Reference numeral 19 denotes a supply source of the cleaning liquid. Reference numeral 20 denotes a valve control. The valve control 20 controls the electromagnetic valve 18. The electromagnetic valve 18 serving as a control valve allows the cleaning liquid to pass or is blocked. The cleaning liquid supply source 19 includes a cleaning liquid tank and a delivery pump. The electromagnetic valve 18 has a response speed of an opening / closing cycle of 0.1 seconds or less, and the amount of spray per unit time can be widely controlled by controlling the opening / closing timing.

  FIG. 3 schematically shows the operation of the electromagnetic valve 18 which is the control valve shown in FIG. The horizontal axis indicates the passage of time, and the vertical axis indicates the state of the electromagnetic valve 18. The electromagnetic valve 18 opens in the OPEN state and closes in the CLOSE state. That is, it opens between T1-T2, T3-T4, and T5-T6, and closes at other times. The state of the electromagnetic valve 18 is controlled by controlling the ratio of the OPEN and CLOSE times in this way. The ratio of OPEN and CLOSE includes a method of changing the CLOSE time with the OPEN time constant and a method of changing both the OPEN time and the CLOSE time. However, the response speed of the electromagnetic valve 18 is increased. Either can be chosen freely.

FIG. 4 is a block diagram of the configuration of the present invention. The cleaning cloth unit 4, the cleaning liquid supply unit 13, and the brush unit 5 are each connected to the control unit 30.
A control interface 31 is connected to the control unit 30. The control interface 31 is placed under the control of a single computer or a computer of the printer main body. The control unit 30 includes the valve control 20 shown in FIG. The control unit 30 has various setting values, which can be received via the control interface 31.

  In the cleaning cloth unit 4, 8 is a winding roll for winding the cleaning cloth 6, and 32 is a winding drive source. Reference numeral 33 denotes a cleaning cloth advance / retreat drive source. The cleaning cloth advance / retreat drive source 33 moves the entire cleaning cloth unit 4 or at least the cleaning pad 9 relative to the cylinder 1 and can be realized by an air cylinder, for example. The winding drive source 32 may be a single motor, but is often mechanically linked to the operation of the cleaning cloth advance / retreat drive source 33. In this case, the winding drive source 32 can be removed from the control target of the control unit 30.

  In the brush unit 5, reference numeral 34 denotes a brush advance / retreat drive source. The brush forward / backward drive source 34 moves at least the rotary brush 10 forward / backward with respect to the cylinder 1. The brush advance / retreat drive source 34 can be realized by an air cylinder. Reference numeral 35 denotes a brush drive source. The brush drive source 35 rotationally drives the rotary brush 10. The brush drive source 35 can be realized by an electric motor. Either can be controlled by the control unit 30.

  Although only the first nozzle 14 has been described in FIG. 2 for the cleaning liquid supply means 13, a second nozzle 15 can be provided in addition thereto. Reference numeral 36 denotes a second electromagnetic valve similar to the electromagnetic valve 18, and reference numeral 37 denotes a second cleaning liquid supply source similar to the cleaning liquid supply source 19. When there are two nozzles 14 and 15, the solvent supplied by the brush 10 can be easily changed. What is to be cleaned on the outer periphery 2 of the cylinder 1 is, for example, oil-based ink or paper powder that is softened with water. The cleaning liquid supply source 19 can contain a solvent-based cleaning liquid that dissolves oil-based ink, and the cleaning liquid supply source 37 can contain a water-based cleaning liquid.

Reference numeral 38 denotes a supply nozzle for the cleaning liquid for cleaning cloth. The supply nozzle 38 is a pipe with a hole through which the cleaning liquid passes, and is provided with small holes at equal intervals on the side surface thereof. As shown in FIG. 1, the cleaning cloth 6 is in the passage route, and the cleaning cloth cleaning liquid can be supplied to the cleaning cloth 6 as necessary.
Reference numeral 39 denotes an electromagnetic valve, and reference numeral 40 denotes a cloth cleaning liquid supply source. The cloth cleaning liquid supply source 40 can have the same structure as the cleaning liquid supply source 19. The electromagnetic valve 39 can also be realized in the same manner as the electromagnetic valve 18. The cloth cleaning liquid may contain a solvent-based cleaning liquid that softens oil-based ink, and may be water-based.

1 is a side view of an embodiment of a cylinder cleaning device according to the present invention. It is a block diagram of a cleaning liquid supply means. It is operation | movement explanatory drawing of a control valve. It is a block diagram of a control system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 3 Cylinder cleaning apparatus 4 Cleaning cloth unit 5 Brush unit 6 Cleaning cloth 9 Cleaning pad 10 Rotating brush 11 Scraper 13 Cleaning liquid supply means 14 1st nozzle 15 2nd nozzle 18 Control valve 19 Cleaning liquid supply source 20 Valve control 30 Control Unit 31 control interface

Claims (4)

In the cylinder cleaning device for cleaning the outer periphery of the cylinder of the printing press,
The cleaning cloth is supplied from a supply roll, the surface of the cylinder is wiped by pressing the cleaning cloth supplied from the supply roll against the outer periphery of the cylinder, and the cleaning cloth is wiped off the surface of the cylinder. Cleaning cloth unit with take-up roll;
A brush unit including a brush disposed upstream of the cleaning cloth unit in relation to the rotation direction of the cylinder and having a brush contact the outer periphery of the cylinder;
A cleaning liquid supply means for supplying a cleaning liquid to the brush of the brush unit;
The cleaning liquid supply means includes a cleaning liquid supply source that supplies the cleaning liquid, a control valve that passes or blocks the cleaning liquid supplied from the cleaning liquid supply source, and the cleaning liquid that has passed through the control valve is atomized and fanned out. A cylinder cleaning apparatus comprising a spray nozzle that sprays the brush of the brush unit as a spray pattern.   2. The cylinder cleaning device according to claim 1, wherein a plurality of the spray nozzles are arranged along a longitudinal direction of the brush, and a spray pattern of the spray nozzle intersects a spray pattern of an adjacent spray nozzle. .   The brush of the brush unit is a cylindrical rotary brush, the rotation speed with respect to the surface of the cylinder can be controlled, and the cleaning liquid supply means can control the supply amount of the cleaning liquid, and the rotation speed The cylinder cleaning apparatus according to claim 1, further comprising a control unit that controls a supply amount of the cleaning liquid.   The cylinder cleaning apparatus according to claim 2, wherein the control unit stores a plurality of patterns with a rotation speed of the rotating brush and a supply amount of the cleaning liquid as preset values.

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