JP2007522962A - Cylinder surface cleaning device - Google Patents

Abstract

  A cylinder surface cleaning device in a printing press is provided. The apparatus includes a cleaning surface (1) that contacts the cylinder surface (16) and an actuator that advances and retracts the cleaning surface (1) toward the cylinder surface (16). The cleaning surface (1) can be rotated by a motor around a rotation axis parallel to the longitudinal center line of the cylinder to be cleaned. That is, the incremental servo drive device (2, 3, 4, 5, 14) that gradually changes the angular position of the cleaning surface (1) according to the rotation of the shaft. The incremental servo drive preferably includes a ratchet mechanism or pawl mechanism (4), while the cleaning surface (1) is divided into several segments, each segment facing in a different direction and quick to install and remove. It is preferably done by a change system.

Description

  The present invention includes a cleaning surface that contacts a cylinder surface that can be rotated by a motor around a rotation axis parallel to the length direction of the cylinder to be cleaned, and an actuator advances the cleaning surface toward the cylinder surface as necessary. The present invention also relates to a cylinder surface cleaning device in a printing press that is to be moved backward.

  Such an apparatus is necessary in order to remove other stains along with residual ink and paper dust from other cylinders in contact with printed matter as well as cylinders involved in printing unless the conventional manual method is used. Nowadays, most printing presses are equipped with such a cleaning device.

  For example, a brush roller that is installed in parallel with the cylinder to be cleaned and advances and retreats with respect to the paper surface is attached to the cleaning surface that contacts the cylinder surface. In order to clean the cylinder surface under optimum conditions, the brush roller is arranged to be rotated by a hydraulic, vacuum or electric motor. The brush roller usually rotates on the cylinder surface during the printing operation of the printing press, but part of it rotates to clean it on the cylinder surface during printing. The dirt removed from the cylinder surface is usually a liquid dissolved in a synthetic detergent mixed with water or a cleaning liquid, which is wiped off with a blade and collected in a container. It is necessary to cover the cylinder surface of the printing machine with a complicated housing so that the dirt dissolved in the collected water and synthetic detergent will not be scattered or sprayed to impair the clean printing of the printing machine. An example of such a device is described in EP 106355 A1.

  The cleaning device described at the beginning includes means that operates on a principle different from this, for example, a cleaning cloth that contacts the cylinder surface and wipes off dirt by rotation of the cylinder surface. The actuator operates the cleaning cloth in cooperation with the feeding device, and the portion that contacts the cylinder surface is constantly renewed. However, this principle requires timely maintenance because the cleaning cloth needs to be periodically replaced with a new one. Moreover, due to the heavy cross roll system, this type of cleaning device cannot be moved alone.

  A further well-known principle of an apparatus for mechanically cleaning the cylinder surface of a printing press would be a simple cleaning blade that contacts the cylinder surface and directly strips off dirt there. Although the adjustment force can be set high to remove stubborn dirt, the cleaning effect is usually not optimal.

  As described above, the problem to be solved by the present invention is to improve the above-described type of cleaning device to be most suitable for the user's application by combining the advantages of various functional principles of the known cleaning device.

  This object is solved by an apparatus having the features described in claim 1. Preferred embodiments and embodiments of the present invention are described in claims 2 to 13.

  Thus, known devices of the above type are basically modified according to the invention. That is, an incremental servo drive device that gradually changes the angular position of the cleaning surface with respect to the rotation axis parallel to the longitudinal center line of the cylinder to be cleaned is provided for rotation by the motor of the cleaning surface. . This incremental servo drive device can be driven by vacuum, hydraulic or electric.

  The principle of the apparatus including a brush roller that can move forward to contact the cylinder surface and is electrically driven around a rotation axis parallel to the center line in the longitudinal direction of the cylinder adopts this aspect of the present invention. Thus, it is possible to save the trouble of readjustment for repairing the damage, and at the same time, the structure is improved including the advantage that a simple cleaning blade can be used. In the present invention, since the cylinder surface to be cleaned is generally rotated during cleaning, there is no need to rotate the cleaning surface of the cleaning device relative to the cylinder surface. Instead, the angular position of the cleaning surface is changed so that a new portion of the cleaning surface contacts the cylinder surface.

  The present invention provides the advantages of the above-described cleaning apparatus with a cleaning cloth, and does not have this problem. This is because, instead of using a brush roller containing cleaning liquid, the cleaning liquid is applied directly to the contact area between the cleaning surface and the cylinder surface. Alternatively, there is no risk that the sheet-type paper will absorb excess solvent, and therefore there is no risk that may occur in subsequent drying of the printing press, and the consumption of the cleaning liquid can be accurately minimized. Also, there is no danger of dirt scattering or mist, and it is no longer necessary to cover the rotating part with a cover.

  Further, the present invention can perform cleaning in an offset type newspaper rotary printing press at full speed in the same manner when the printing press is operating or stopped, and with or without paper contact on the cylinder surface. It is preferable that the cleaning surface feed movement is timed by changing the relative angular position of the cleaning surface with respect to the rotation axis. As already mentioned, by gradually rotating the cleaning surface, complicated installation and adjustment for advancing the cleaning surface to contact the cylinder surface can be omitted.

  The cleaning surface can be shaped by the shell surface of the cylinder. That is, for example, it is formed of a brush roller or a simple cylinder segment. In this apparatus, the cleaning surface comprises a plurality of different surfaces, each forming a cylinder segment of the shell surface. For example, a brush surface can be combined with a sponge surface and a cross surface. The brush surface is composed of strong bristles so that the surface on the cylinder with the dirt attached can be quickly peeled off, and the peeled dirt layer is wiped off later by the cloth surface or the sponge surface. It is of course possible to form all the cylinder surfaces with one type of cleaning surface. For example, only the cylinder segment alone can be replaced while the rest of the device is attached and in operation.

  By dividing the shell surface of the cylinder into multiple cleaning surfaces in this way, it is possible to use the cylinder surface with a high degree of freedom and to clean the cylinder surface whose dirt changes depending on the current processing parameters of the printing press according to needs It is possible to combine the same or different types of cleaning surfaces.

  In a preferred embodiment of the present invention, the cylinder segment or shell surface is formed and arranged so as not to be coaxial with the rotational axis, but the cross section is configured in the form of a rotary piston. This configuration shows that the cleaning surface of each cylinder segment can be separated from the other segments, and that the cleaning surfaces of the cylinder segments can be attached and removed individually.

  Furthermore, the advantages are particularly evident when the cleaning surface is attached to the profile or frame using a quick change system. Such a quick change system includes, for example, a fixing member that can be quickly removed in the axial direction and the radial direction, such as a mounting plate installed in a printing cylinder. When worn out, when the soiling is severe, or when cleaning remotely from the cleaning device, it is no longer necessary to disassemble the entire device to replace the cleaning surface. Instead, it is only necessary to remove and replace the particular cleaning surface associated with the quick change system while the other parts of the apparatus are running.

  Carbon fiber is advantageous in terms of weight savings so that the entire device can be removed and installed by one operator, but the profile or frame used for this purpose may be made of extruded aluminum.

  A cleaning blade and / or squeezing device is preferably mounted on the cleaning surface of the device according to the invention, but these act on the working cleaning surface that does not contact the cylinder surface to be cleaned and are attached dirt. Remove the cleaning solution. The cleaning surface is rotated and rotated and then manipulated and reused to contact the cylinder surface to be cleaned.

  A sprayer that sprays the cylinder surface and / or the cleaning surface to spray the cleaning liquid onto the cylinder surface to be cleaned is provided in the form of a well-known independent spray tube. However, it is alternatively possible to supply the cleaning liquid to the cleaning surface which holds the cleaning liquid in the contact area between the cleaning surface and the cylinder surface to be cleaned, using means within the structure or outer shape described above, The cleaning liquid distributor is integrated into the cleaning surface for this purpose.

  In a particularly preferred embodiment of the present invention, the incremental drive includes a ratchet mechanism or pawl mechanism in which a hydraulic or vacuum piston cylinder unit is installed. Although it is possible to use an electric stepping motor in the same manner as the incremental servo drive device, it has a disadvantage that it is heavier than a simpler ratchet mechanism or pawl mechanism.

  Since the constant piston stroke of the piston cylinder unit is transmitted to the cleaning surface via the ratchet mechanism or pawl mechanism, the cleaning surface measures relative to the rotation axis parallel to the axial center line of the cylinder to be cleaned. It is possible to perform a specific feed movement.

  Two embodiments of the device according to the present invention will become more apparent with reference to the accompanying drawings.

  FIG. 1 is a perspective view of an embodiment of the apparatus according to the present invention, which is offset by conventional rotary printing, which is advanced by a well-known actuator (not shown) to contact a cylinder surface (not shown) to be cleaned. A machine cleaning device is shown. The actuator typically includes two short stroke cylinders, each cylinder being attached to a side plate of a printing press.

  The apparatus shown in FIG. 1 comprises four cleaning surfaces 1, each cleaning surface being shaped as a shell surface of a cylinder segment that together forms an entire cylinder shell. The cleaning surface 1 is rotated and cleaned in a timely manner by a vacuum incremental drive device including a vacuum short stroke cylinder 2, a link 3, and a commercially available ratchet mechanism 4. The reciprocating motion of the vacuum short stroke cylinder 2 is converted into the rotational motion of the ratchet mechanism 4 by the link 3, and as a result, the angular position of the cleaning surface with respect to the rotational axis passing through the center of the ratchet mechanism 4 changes. Depending on the position of 5, the cylinder surface rotates in the forward or reverse direction for each stroke of the short stroke cylinder 2. The ratchet mechanism 4 is pawled at a position corresponding to each stroke of the short stroke cylinder 2, and the cleaning surface is held at a fixed angular position. As a result of this feed movement of the cleaning surface 1, a new unused cleaning surface is always in contact with the cylinder surface, so that on the one hand the dirt has already been partially removed and on the other hand a clean cleaning surface is always used, so that cleanliness is achieved. The material is reliably transferred.

  The spray pipe 6 ensures that the cleaning liquid is sprayed on the surface of the cylinder to be cleaned, that is, the area where the cleaning surface 1 and the cylinder surface are in contact with each other and cleaned. Alternatively, the cleaning liquid can be supplied from an internal member that passes through a region where the cleaning surface 1 contacts the surface to be cleaned of the cylinder.

  The cleaned dirt and the remainder of the cleaning liquid carried to the cleaning surface 1 are guided to the cleaning blade 7 by constant time-feeding movement, and are wiped off and / or squeezed out. The cleaning effect and the regeneration of each cleaning surface are ensured. In this arrangement, the cleaning blade 7 is supported by a plurality of fixtures 8 for the cleaning blade, the number of fixtures varying depending on the width of the printing press. The engagement depth of the cleaning blade and the strength associated with the self-cleaning action are set by a set screw 9.

  Referring to FIG. 2, how the components of the apparatus according to the present invention are held in a framework that mainly includes two side plates 10, a mounting surface (mounting profile) 11, and a tube (tubular profile) 12. It is specified. The cleaning surface 1 is fixed to the tube 12 by using axial and radial fixing members 13, and the fixing member 13 is formed of a quick release fastener that can be quickly replaced. When it is necessary to remove the cleaning surface 1 for later cleaning or replacement, it can even be replaced with the device attached.

  Referring to FIG. 3, the side view of the device shown in FIG. 1 is shown enlarged to clearly illustrate its functional structure. The ratchet mechanism 4 is in contact with the pipe 12 installed on the side plate 10 and operates via the side plate 10. As soon as the short stroke cylinder 2 reciprocates once through the link 3, the tube 12 moves.

  Referring to FIG. 4, a second embodiment of the apparatus according to the present invention is shown in a simplified diagram. In order to attach three different cleaning surfaces, i.e. brush surface, cross surface and sponge surface, the frame is configured in the shape of a ring piston in cross section, and the coaxially arranged stepping motor 14 functions as an incremental drive. To do. A cleaning device for the cylinder surface 16 is constituted by the cleaning blade or wringer roll 7 and the spray pipe 6 for the cleaning liquid 15.

  The apparatus shown in FIG. 4 can wipe off dirt accumulated stubbornly with a hard brush surface from the cylinder surface 16, wipe off dirt remaining on the sponge surface 1 ', and dry the surface with a cloth surface 1mm. Again, a quick change system is used to facilitate the installation and removal of the cleaning surfaces 1, 1mm and 1 '.

  The disclosed invention is a novel cleaning device having versatility, and is particularly suitable for cleaning a blanket cylinder in a rotary offset printing press and a sheet-fed offset printing press. In contrast to previously known devices using brushes or cloth, here a combination of systems that use both brushes and cloth as well as additional cleaning means such as sponges, microfibers, and other media having a cleaning surface Can be included.

The perspective view of 1st Example of the apparatus in this invention Exploded view of the device shown in FIG. Partial perspective view of the device shown in FIG. Schematic side view of a second embodiment of the device according to the invention

Claims (16)

A cleaning surface (1) that is in contact with the cylinder surface (16) and can be rotated by a motor around a rotation axis (17) parallel to the longitudinal center line of the cylinder to be cleaned, and the cleaning surface is the cylinder surface And (16) an actuator that moves forward and backward from the actuator,
For the electric rotation of the cleaning surface (1), an incremental servo drive device (2, 3, 4, 5, 14) that gradually changes the angular position of the cleaning surface (1) with respect to the rotating shaft (17) is used. A device that cleans the cylinder surface of a printing press.   For the electric drive of the cleaning surface (1), an incremental servo drive device (2, 3, 4, 5, 14) for correcting the angular position of the cleaning surface (1) that moves in time with respect to the rotation axis. The apparatus according to claim 1, wherein:   The apparatus according to claim 1 or 2, wherein the cleaning surface (1) comprises a cylinder shell surface or a cylinder segment.   4. The apparatus according to claim 3, wherein the cleaning surface (1, 1 ', 1 ") comprises a plurality of surfaces, each constituting a shell surface of a cylinder segment.   The apparatus according to claim 4, wherein the cleaning surface (1, 1 ', 1 ") comprises a plurality of different surfaces.   6. The apparatus according to claim 4, wherein the shell surfaces of the plurality of cylinder segments are arranged so as not to be coaxial with the rotation axis, and the cut surface has a shape of a rotary piston.   7. A device according to any one of the preceding claims, wherein the cleaning surface ((1) or (1, 1 ', 1 ")) comprises a brush surface, a sponge surface and / or a cloth.   The device according to any one of the preceding claims, wherein at least one of the cleaning surfaces is fixed to the profile (12) or the frame by means of a quick change system.   9. The device according to claim 8, wherein the quick change system comprises a quick release fastener with axial and radial fastening members (13).   The apparatus according to claim 8 or 9, wherein the profile (12) or frame is formed of extruded aluminum or carbon fibre.   Device according to any one of the preceding claims, wherein the cleaning surface (1) comprises a cleaning blade and / or squeezing means.   12. A device according to any one of the preceding claims, comprising a sprayer (6) for spraying a cleaning liquid onto the cylinder surface (16) and / or the cleaning surface (1).   12. A device according to any one of the preceding claims, wherein a cleaning liquid distributor is integrated in the cleaning surface (1).   14. An apparatus according to any one of the preceding claims, wherein the incremental servo drive device comprises a ratchet mechanism or a pawl mechanism (4).   15. The device according to claim 14, wherein the ratchet mechanism or pawl mechanism (4) comprises a hydraulic or vacuum piston cylinder unit.   The apparatus according to claim 1, wherein the incremental servo drive is an electric stepping motor.

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