EP2788193B1 - Sensing device for markers on a roll of a printing press - Google Patents
Sensing device for markers on a roll of a printing press Download PDFInfo
- Publication number
- EP2788193B1 EP2788193B1 EP12798711.3A EP12798711A EP2788193B1 EP 2788193 B1 EP2788193 B1 EP 2788193B1 EP 12798711 A EP12798711 A EP 12798711A EP 2788193 B1 EP2788193 B1 EP 2788193B1
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- EP
- European Patent Office
- Prior art keywords
- sensing
- printing
- scanning
- roll
- printing press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 claims description 16
- 238000007774 anilox coating Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 description 11
- 239000003086 colorant Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 230000006735 deficit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002360 explosive Substances 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0081—Devices for scanning register marks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
- B41F13/14—Registering devices with means for displacing the cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2233/00—Arrangements for the operation of printing presses
- B41P2233/50—Marks on printed material
- B41P2233/52—Marks on printed material for registering
Definitions
- the present invention relates to a scanning device for markers on a roller, in particular a format roller, in the printing area of a printing machine and such a printing machine with a printing area and a printing method for a printing machine with a scanner for markers on a roller.
- Each inking unit has at least one roller, in particular a so-called pressure roller or format rollers, with the aid of which paper or other materials can be printed.
- one or more inking units are used depending on the color system. If a colored print is desired and, for example, the RGB (red, green, blue) system is used, at least three inking units are accordingly required. The different colors are achieved by mixing the three basic colors. Each of the primary colors requires a single inking unit. Since the basic color images are applied successively, it is necessary that the individual images are aligned with each other congruent. Otherwise, a misalignment would arise that would be a significant quality defect in the printed image.
- scanning devices for markers are provided on a roller, in particular on the size or pressure roller.
- a printing device is provided with different cylinders, which is equipped via a scanning device for rotational alignment of the pressure rollers.
- optical scanning devices are used, which can perceive markers on the pressure roller in an optical manner, for example by camera systems.
- the rotation situation and the page register situation of this roller can be detected.
- the rotational position and the lateral orientation of the roller, in particular with respect to the printed image to be applied by the roller are measured.
- an adjustment of the format roller in particular with reference to the rotation situation and the lateral alignment of the further rollers, can be carried out for the printing of materials.
- a disadvantage of known printing machines is that these scanning devices are sensitive. Particularly in the case of optical scanning devices, influencing by the color in the printing area of the printing press is of high relevance.
- the scanning device can therefore be arranged behind a protective housing during a time in which it is not used for measuring a roller, see, for example, US Pat WO 2011/058074 , If the scanner is damaged or damaged, it may cause misalignment of the size roller or platen roller for subsequent printing. This in turn leads to misprints and therefore to rejects in the production of printed matter.
- Scanning device for markers on a roller in the printing area of a printing machine to provide a corresponding printing machine with a printing area and a printing method for a printing machine with a scanner for markers available, which can ensure better protection of the scanning device or the printing machine in a cost effective and simple manner.
- a scanning device is designed for markers on a roller, in particular a form roller or pressure roller, in the printing area of a printing press and has a pivotable Abtastarm with a scanning head for scanning the marker and a drive for pivoting the Abtastarms between a scanning position and a parking position.
- the scanning device is characterized in that the scanning head in the parking position of at least one shielding element against the printing area of the printing machine can be shielded.
- markers can be perceived in many different ways. So it is possible that an optical scanning of the markers takes place. Alternatively or additionally, other forms of markers, for example magnetic, electrosensory or similar markers may be perceived.
- a pivotable scanning is provided with a scanning head for scanning the marker and a drive for pivoting the Abtastarmes between a scanning position and a parking position.
- the scanner In the park position, the scanner is in a configuration in which printing can be performed. Since, for the scanning position, the scanning head of the scanning device is as close as possible to or in the area If the roller must be located in this position could possibly cause an impairment of the printing process, in particular a collision between the scanning head and roller. Accordingly, the scanning head is pivoted to a parking position.
- a shielding element according to the invention can be arranged both statically and movably. It is crucial that the shielding function of the shielding element is achieved.
- the scanning device itself can basically be arranged both inside and outside a housing of the printing area of the printing press. However, the scanning device will preferably be arranged outside the printing area, so that such an enclosure of the printing press represents at least a part of the shielding element.
- the enclosure can include the machine frame or machine frame parts or attachments on the machine frame of the printing press.
- the protection of at least the scanning head is achieved by the shielding element.
- This protection relates in particular to color which is used in the printing area of the printing press. In particular, in this way color splashes on or in the vicinity of the scanning head can be avoided. Damage, impairment or contamination of the scanning head is thus reduced or completely avoided by the shielding.
- the pivoting range between scanning position and parking position is in the range between approximately 0 ° and approximately 180 °. In particular, a pivoting range of about 165 ° is preferred.
- the roller on which markers can be scanned is preferably a form roller or a pressure roller. It is therefore the roller which is in printing contact with the medium to be printed. Accordingly, it is also the roller that is relevant to the rotational position and the page orientation for superimposing differently colored print images.
- the pivoting movement of the scanning head can be carried out in various ways.
- this pivoting movement takes place on a circular path or a partially circular path.
- the curved embodiment of the pivoting has the advantage that particularly inexpensive and easy drive of the Abtastarms or the scanning head can be done.
- the provision of a circular path also reduces the space required for the pivoting between the two positions.
- the scanning head for optical scanning of the markers is formed on the format roller.
- the scanning head may be an optical system in the form of a camera system or other optical sensors.
- the optical markers are for example geometric shapes, for example triangles or other polygons. In this way, in particular, a particularly cost-effective optical system can be used, since contamination of the scanning head by the shielding substantially omitted and thus a possible cleaning of the scanning head can be avoided.
- a further advantage can be achieved in that in a scanning device according to the invention at least one parking sensor is arranged in the parking position in order to detect the positioning of the scanning head in the parking position.
- This may be, for example, an inductive sensor.
- sensors such as simple mechanical switches, optical sensors, such as photoelectric sensors, or the like are conceivable.
- the sensor for the perception of the perception of the parking situation serves to make the use of a scanning device according to the invention even safer. For example, this information from the sensor can be used so that the subsequent printing process can not begin until one or all scanning heads of a plurality of scanning devices are in the respective parking position.
- the shielding be efficiently ensured for one or all scanning devices of a printing press with higher security, but also the probability of a collision between the scanning head and one or more rollers can be avoided. Such a collision could otherwise lead to damage of the roller, which would require the replacement of the roller. In this way, the roller is thus additionally protected. It is also ensured that the scanning head is shielded to start the printing process.
- the shielding element forms a separate housing for the scanning head in the parking position.
- the separate housing can also be referred to as a garage or separate garage.
- a housing is provided, in which the scanning head at least partially or completely retracts. Shielding thus takes place at least from two spraying directions from the perspective of the printing area. This results in an even more efficient shielding, which further minimizes the risk of contamination of the scanning head.
- the scanning head is substantially completely enclosed, that is to say completely enclosed by all but one side.
- Movable parts of the shielding element which are moved to a shielding position after the scanning head has been moved into the parking position, can also be advantageous in the context of the present invention.
- this housing can be closed in order to provide optimal shielding of the scanning head in the parking position.
- the drive has at least one lifting piston, wherein the linear movement of the lifting piston is converted into a rotational movement by means of a gear.
- a reciprocating piston in comparison to electric motors has the advantage that a scanning device according to the invention can be made significantly less expensive.
- printing processes often take place in the potentially explosive area (EX area), since the printing inks are often combustible or explosive substances. Accordingly, it is a so-called EX area.
- EX-protected embodiment of the electric motor EX-protected reciprocating pistons are significantly cheaper and, in comparison to the investment costs, similar or identical to "normal" reciprocating pistons.
- the reciprocating pistons are preferably operated pneumatically.
- reciprocating with significantly less space and also with less Steuer whichmoi control effort in a scanning device according to the invention be used.
- the transmission is preferably designed such that an eccentric disk connection takes place.
- an eccentric pin By an eccentric pin, the linear movement of the tiltably or pivotally mounted piston can be converted into the desired rotational movement for the pivoting of the Abtastarms.
- the drive has a toothed belt which carries out the pivoting movement of the scanning arm.
- the toothed belt also leads to reduced space requirements in a scanning device according to the invention.
- the need for maintenance when using a toothed belt is significantly reduced.
- a timing belt is cheaper than, for example, the use of a transmission of gears.
- a toothed belt complex pivoting movements such as relatively large pivoting radii or complex curves for the pivoting movement of the scanning head can be possible.
- the use of a toothed belt made of a plastic material, which is in particular electrically conductive is with respect to a possible danger of explosion in the application of the scanning advantage.
- a further advantage can be achieved in that in a scanning device according to the invention at least one clamping device, in particular a tensioning wheel, is provided for tensioning the toothed belt. This can preferably be done manually by hand to bring the timing belt in the desired threshold voltage. This is done in particular when replacing individual components of the scanning device or at the first setting of the scanning device. Also, an exchange of the scanning head or a calibration of the scanning head can lead to a necessary retightening of the toothed belt.
- a further subject of the present application is a printing machine with a printing area, comprising an enclosure for the printing area, in which at least two inking units, each with a format roller and an anilox roller, are arranged around a counterpressure roller in contact with the counterpressure roller.
- a printing press according to the invention is characterized in that, for each inking unit, in particular for each format roller, at least one scanning device according to the invention is provided.
- the housing can be understood in particular as a mechanically stabilizing framework for the storage of the rollers or the inking units. It also serves to delimit the print area from the environment.
- such a printing press is a multi-color printing press in which a multiplicity of mixed colors can be achieved by mixing different primary colors.
- the individual format rollers In order to be able to superimpose these individual differently colored printed images neatly, the individual format rollers must be aligned with respect to their rotational position and lateral position with respect to one another by means of the scanning device.
- the use of a scanning device according to the invention thus leads to the same advantages as have been explained in detail with reference to a scanning device according to the invention.
- a printing press according to the invention can be developed in such a way that the scanning head of the scanning device is directed away from the format roller in the parking position.
- the contra-orientation with respect to the form roller results in even further improved shielding.
- the scanning device or the scanning head projects out of the printing area, so that there is also a spatial spacing between the format roller and the scanning head.
- the opposite orientation is achieved, for example, by a pivoting range between about 0 ° and about 180 °, in particular of about 165 °.
- the scanning device with respect to the inking units and the counterpressure roller is arranged at least partially on the outside of the housing.
- the housing forms at least part of the screening element of the scanning device.
- an additional housing such as a "garage” for the scanning as a shielding.
- the scanning arm can be pivoted in and out, for example, through an opening in the housing, so that the scanning position and the parking position are located on different sides of the housing. Also with possible replacement work of the rollers in Inside the enclosure can be achieved in this way an improved protection of the entire scanning device.
- At least the parking position of the scanning head is arranged on the outside of the housing.
- at least parts of the scanning device can also be arranged within the housing, that is to say in the printing area of the printing press.
- a printing method for a printing machine with a scanning device for markers on a roller, in particular a format roller or pressure roller, in the printing area of a printing press is characterized in that a scanning head of the scanning device is pivoted with a scanning arm for the calibration of a format roller in a scanning position and for carrying out the printing in a parking position. In the parking position, the scanning head is shielded against the printing area of the printing press.
- a printing method according to the invention is preferably carried out for a scanning device according to the present invention or for a printing press according to the invention. Accordingly, such a printing method also brings about the same advantages as have been explained in detail with reference to a printing press according to the invention or with reference to a scanning device according to the invention.
- a printing method according to the invention can be further developed such that in a first step the scanning of the markers on the roller by the scanning head in a scanning position, in a second step, the pivoting of the scanning head in the parking position and in a third step, the implementation of the printing.
- scanning is independent of printing. Printing will not start until after the scan is complete.
- the protection of the scanning head in accordance with the invention can be further improved.
- FIG. 1 a first embodiment of a printing machine 200 according to the invention is shown.
- This is provided with an enclosure 150, which is formed around a pressure area 100 around.
- a printing area 100 is, for example, as in FIG FIG. 5 shown, provided with different inking units 140 and a counter-pressure roller 130.
- the inking units 140 each have a format roller 110 and an anilox roller 120.
- Each of these inking units stands for a basic color, so that mixed colors can be achieved in any variation by superimposing the different color images.
- the individual format rollers 110 must be aligned in terms of rotation and with respect to their side alignment to each other in order to superimpose the individual images.
- the enclosure 150 may include the machine frame or machine frame parts or attachments to the machine frame of the printing machine 200.
- the alignment of the rotational position and the page orientation of the format rollers 110 is performed by a scanning device 10, as for example in the FIGS. 1 to 4 is shown.
- This scanning device 10 is provided with a scanning arm 20, which is pivotally mounted between a scanning position A and a parking position P.
- a scanning head 22 is provided, which is designed for recognizing markers on the format roller 110.
- the scanning head 22 is preferably an optical scanning head 22. The scanning takes place before the start of printing. As soon as the markers give a measurement of the format rollers in the desired rotational position and lateral position, the scanning head 22 is pivoted into the parking position P via the scanning arm 20.
- the two Verschwenkpositionen are in the Figures 3 and 4 shown.
- a drive 30 is provided.
- This drive 30 is equipped in this embodiment with a reciprocating piston 32.
- This reciprocating piston 32 is rotatably supported at one end and eccentrically connected at its opposite end with a hub.
- the hub can be understood as a transmission 34, which converts the linear movement of the reciprocating piston 32 in the desired rotational movement for the Abtastarm 22.
- a toothed belt 36 is provided for the further transmission of the force from the drive 30 to the Abtastarm 20 .
- This toothed belt 36 is tensioned via a tensioning device 38 in the form of a set screw. Via the toothed belt 36, the rotational force for the pivoting operation between the scanning position A and the parking position P is provided.
- the scanning arm 20 When the scanning operation is in operation, the scanning arm 20 is pivoted to the position as shown in FIG FIG. 3 is shown.
- the scanning head 22 is in the scanning position A, so that markers can be perceived on the form roller 110. If the alignment or calibration of the format roller 110 has been carried out successfully, the scanning arm 20 and thus also the scanning head 22 are driven by the drive 30 into the parking position P. This situation is in FIG. 4 shown.
- a parking sensor 50 is provided to detect when or that the scanning head 22 has moved to the parking position P.
- a shielding element 40 is provided.
- the shielding element 40 may, at least in some embodiments, only through the housing 150 be formed. This is for example in the FIGS. 1 and 2 to recognize. However, it is also possible, as in the Figures 3 and 4 It is shown that additionally or alternatively further parts of a shielding element 40 are provided. According to FIG. 3 and 4 a separate housing is provided as a shielding element 40, in which the scanning arm 20 pivots for reaching the parking position P. This allows a further improved shielding of the scanning head 22.
- the scanning head 22 is remote in the parking position P from the printing area 100. This also improves the shielding of the scanning head 22 against impairment or damage.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ink Jet (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
Die vorliegende Erfindung betrifft eine Abtastvorrichtung für Marker auf einer Walze, insbesondere einer Formatwalze, im Druckbereich einer Druckmaschine sowie eine derartige Druckmaschine mit einem Druckbereich und ein Druckverfahren für eine Druckmaschine mit einer Abtastvorrichtung für Marker auf einer Walze.The present invention relates to a scanning device for markers on a roller, in particular a format roller, in the printing area of a printing machine and such a printing machine with a printing area and a printing method for a printing machine with a scanner for markers on a roller.
Es ist bekannt, dass Druckmaschinen mit einer Vielzahl sogenannter Farbwerke verwendet werden. Jedes Farbwerk weist zumindest eine Walze, insbesondere eine sogenannte Druckwalze oder Formatwalzen, auf, mit deren Hilfe Papier oder andere Materialien bedruckt werden können. Üblicherweise werden je nach Farbsystem eine oder mehrere Farbwerke verwendet. Wird ein farbiger Druck gewünscht und zum Beispiel das RGB (rot, grün, blau) System verwendet, so sind dementsprechend zumindest drei Farbwerke notwendig. Die unterschiedlichen Farben werden durch Mischung der drei Grundfarben erreicht. Für jede der Grundfarben ist ein einzelnes Farbwerk vonnöten. Da die Grundfarbbilder nacheinander aufgebracht werden, ist es notwendig, dass die einzelnen Bilder zueinander deckungsgleich ausgerichtet sind. Andernfalls würde ein Versatz entstehen, der im gedruckten Bild einen deutlichen Qualitätsmangel darstellen würde.It is known that printing machines are used with a variety of so-called inking. Each inking unit has at least one roller, in particular a so-called pressure roller or format rollers, with the aid of which paper or other materials can be printed. Usually, one or more inking units are used depending on the color system. If a colored print is desired and, for example, the RGB (red, green, blue) system is used, at least three inking units are accordingly required. The different colors are achieved by mixing the three basic colors. Each of the primary colors requires a single inking unit. Since the basic color images are applied successively, it is necessary that the individual images are aligned with each other congruent. Otherwise, a misalignment would arise that would be a significant quality defect in the printed image.
Bei bekannten Druckmaschinen sind aus diesem Grund Abtastvorrichtungen für Marker auf einer Walze, insbesondere auf der Format- oder Druckwalze, vorgesehen. Beispielsweise ist hier die
Nachteilhaft bei bekannten Druckmaschinen ist es, dass diese Abtastvorrichtungen empfindlich sind. Insbesondere bei optischen Abtastvorrichtungen ist eine Beeinflussung durch die Farbe im Druckbereich der Druckmaschine von hoher Relevanz. Um die Abtastvorrichtung vor Verunreinigungen zu schützen, kann die Abtastvorrichtung während einer Zeit, in der sie nicht zum Vermessen einer Walze eingesetzt wird, daher hinter einer Schutzeinhausung angeordnet sein, siehe beispielsweise die
Es ist Aufgabe der vorliegenden Erfindung, die voranstehenden Probleme zumindest teilweise zu beheben. Insbesondere ist es Aufgabe der vorliegenden Erfindung eine Abtastvorrichtung für Marker auf einer Walze im Druckbereich einer Druckmaschine, eine entsprechende Druckmaschine mit einem Druckbereich sowie ein Druckverfahren für eine Druckmaschine mit einer Abtastvorrichtung für Marker zur Verfügung zu stellen, welche in kostengünstiger und einfacher Weise einen besseren Schutz der Abtastvorrichtung beziehungsweise der Druckmaschine gewährleisten kann.It is an object of the present invention to at least partially overcome the above problems. In particular, it is an object of the present invention Scanning device for markers on a roller in the printing area of a printing machine to provide a corresponding printing machine with a printing area and a printing method for a printing machine with a scanner for markers available, which can ensure better protection of the scanning device or the printing machine in a cost effective and simple manner.
Voranstehende Aufgabe wird gelöst durch eine Abtastvorrichtung mit den Merkmalen des Anspruchs 1, eine Druckmaschine mit den Merkmalen des Anspruchs 8 sowie ein Druckverfahren mit den Merkmalen des Anspruchs 12. Weitere Merkmale und Details der Erfindung ergeben sich aus den Unteransprüchen, der Beschreibung und den Zeichnungen. Dabei gelten Merkmale und Details, die im Zusammenhang mit der erfindungsgemäßen Abtastvorrichtung beschrieben sind, selbstverständlich auch im Zusammenhang mit dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Druckmaschine und jeweils umgekehrt, so dass bezüglich der Offenbarung zu den einzelnen Erfindungsaspekten stets wechselseitig Bezug genommen wird beziehungsweise werden kann.The above object is achieved by a scanning device having the features of claim 1, a printing machine having the features of claim 8 and a printing method having the features of claim 12. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings. In this case, features and details that are described in connection with the scanning device according to the invention apply, of course, in connection with the inventive method and the printing press according to the invention and in each case vice versa, so that with respect to the disclosure of the individual aspects of the invention is always reciprocal reference or can be.
Eine erfindungsgemäße Abtastvorrichtung ist für Marker auf einer Walze, insbesondere einer Formatwalze oder Druckwalze, im Druckbereich einer Druckmaschine ausgelegt und weist einen schwenkbaren Abtastarm mit einem Abtastkopf für die Abtastung der Marker und einen Antrieb für das Versschwenken des Abtastarms zwischen einer Abtastposition und einer Parkposition auf. Die Abtastvorrichtung zeichnet sich dadurch aus, dass der Abtastkopf in der Parkposition von wenigstens einem Abschirmelement gegen den Druckbereich der Druckmaschine abschirmbar ist. Insbesondere können Marker in unterschiedlichster Weise wahrgenommen werden. So ist es möglich, dass eine optische Abtastung der Marker erfolgt. Alternativ oder zusätzlich können andere Formen von Markern, zum Beispiel magnetische, elektrosensorische oder ähnliche Marker wahrgenommen werden. Bei einer erfindungsgemäßen Abtastvorrichtung ist ein schwenkbarer Abtastarm mit einem Abtastkopf für die Abtastung der Marker sowie einem Antrieb für das Verschwenken des Abtastarmes zwischen einer Abtastposition und einer Parkposition vorgesehen. In der Parkposition befindet sich die Abtastvorrichtung in einer Konfiguration, in welcher der Druckvorgang durchgeführt werden kann. Da sich für die Abtastposition der Abtastkopf der Abtastvorrichtung möglichst nahe am oder im Bereich der Walze befinden muss, würde in dieser Position möglicherweise eine Beeinträchtigung des Druckvorgangs, insbesondere eine Kollision zwischen Abtastkopf und Walze, entstehen können. Dementsprechend wird der Abtastkopf in eine Parkposition verschwenkt.A scanning device according to the invention is designed for markers on a roller, in particular a form roller or pressure roller, in the printing area of a printing press and has a pivotable Abtastarm with a scanning head for scanning the marker and a drive for pivoting the Abtastarms between a scanning position and a parking position. The scanning device is characterized in that the scanning head in the parking position of at least one shielding element against the printing area of the printing machine can be shielded. In particular, markers can be perceived in many different ways. So it is possible that an optical scanning of the markers takes place. Alternatively or additionally, other forms of markers, for example magnetic, electrosensory or similar markers may be perceived. In a scanning device according to the invention, a pivotable scanning is provided with a scanning head for scanning the marker and a drive for pivoting the Abtastarmes between a scanning position and a parking position. In the park position, the scanner is in a configuration in which printing can be performed. Since, for the scanning position, the scanning head of the scanning device is as close as possible to or in the area If the roller must be located in this position could possibly cause an impairment of the printing process, in particular a collision between the scanning head and roller. Accordingly, the scanning head is pivoted to a parking position.
Bei einer erfindungsgemäßen Abtastvorrichtung ist der Abtastkopf in der Parkposition von wenigstens einem Abschirmelement gegen den Druckbereich der Druckmaschine abschirmbar. Dabei kann ein erfindungsgemäßes Abschirmelement sowohl statisch, als auch beweglich angeordnet sein. Entscheidend ist, dass die Abschirmfunktion des Abschirmelementes erzielt wird. Dabei kann die Abtastvorrichtung selbst grundsätzlich sowohl innerhalb, als auch außerhalb einer Einhausung des Druckbereichs der Druckmaschine angeordnet sein. Jedoch wird vorzugsweise die Abtastvorrichtung außerhalb des Druckbereichs angeordnet sein, so dass eine solche Einhausung der Druckmaschine zumindest einen Teil des Abschirmelementes darstellt. Die Einhausung kann das Maschinengestell oder Maschinengestellteile oder Anbauteile am Maschinengestell der Druckmaschine mitumfassen.In a scanning device according to the invention, the scanning head in the parking position of at least one shielding element against the printing area of the printing machine can be shielded. In this case, a shielding element according to the invention can be arranged both statically and movably. It is crucial that the shielding function of the shielding element is achieved. In this case, the scanning device itself can basically be arranged both inside and outside a housing of the printing area of the printing press. However, the scanning device will preferably be arranged outside the printing area, so that such an enclosure of the printing press represents at least a part of the shielding element. The enclosure can include the machine frame or machine frame parts or attachments on the machine frame of the printing press.
Bei einer erfindungsgemäßen Abtastvorrichtung wird der Schutz zumindest des Abtastkopfes durch das Abschirmelement erzielt. Dieser Schutz bezieht sich insbesondere auf Farbe, welche im Druckbereich der Druckmaschine verwendet wird. Insbesondere können auf diese Weise Farbspritzer am oder in der Nähe des Abtastkopfes vermieden werden. Eine Beschädigung, Beeinträchtigung oder Verschmutzung des Abtastkopfes wird somit durch das Abschirmelement reduziert beziehungsweise vollständig vermieden.In a scanning device according to the invention, the protection of at least the scanning head is achieved by the shielding element. This protection relates in particular to color which is used in the printing area of the printing press. In particular, in this way color splashes on or in the vicinity of the scanning head can be avoided. Damage, impairment or contamination of the scanning head is thus reduced or completely avoided by the shielding.
Bei einer erfindungsgemäßen Abtastvorrichtung liegt der Schwenkbereich zwischen Abtastposition und Parkposition im Bereich zwischen ca. 0° und ca. 180°. Insbesondere wird ein Schwenkbereich von ca. 165° bevorzugt. Die Walze, auf welcher Marker abgetastet werden können, ist vorzugsweise eine Formatwalze beziehungsweise eine Druckwalze. Es handelt sich also um die Walze, welche im druckenden Kontakt mit dem zu bedruckenden Medium steht. Dementsprechend ist es auch die Walze, welche hinsichtlich der rotatorischen Position und der Seitenausrichtung relevant ist für das Übereinanderlegen unterschiedlich farbiger Druckbilder.In a scanning device according to the invention, the pivoting range between scanning position and parking position is in the range between approximately 0 ° and approximately 180 °. In particular, a pivoting range of about 165 ° is preferred. The roller on which markers can be scanned is preferably a form roller or a pressure roller. It is therefore the roller which is in printing contact with the medium to be printed. Accordingly, it is also the roller that is relevant to the rotational position and the page orientation for superimposing differently colored print images.
Die Schwenkbewegung des Abtastkopfes kann in unterschiedlichster Weise ausgeführt sein. Insbesondere erfolgt diese Schwenkbewegung auf einer Kreisbahn oder einer zum Teil kreisförmigen Bahn. Die gekrümmte Ausführungsform des Verschwenkens bringt den Vorteil mit sich, dass besonders kostengünstig und einfach der Antrieb des Abtastarms beziehungsweise des Abtastkopfes erfolgen kann. Das Vorsehen einer Kreisbahn reduziert darüber hinaus den Platzbedarf für das Verschwenken zwischen den beiden Positionen.The pivoting movement of the scanning head can be carried out in various ways. In particular, this pivoting movement takes place on a circular path or a partially circular path. The curved embodiment of the pivoting has the advantage that particularly inexpensive and easy drive of the Abtastarms or the scanning head can be done. The provision of a circular path also reduces the space required for the pivoting between the two positions.
Es kann von Vorteil sein, wenn bei einer erfindungsgemäßen Abtastvorrichtung der Abtastkopf für eine optische Abtastung der Marker auf der Formatwalze ausgebildet ist. Zum Beispiel kann es sich bei dem Abtastkopf um ein optisches System in Form eines Kamerasystems oder anderer optischer Sensoren handeln. Die optischen Marker sind zum Beispiel geometrische Formen, zum Beispiel Dreiecke oder andere Vielecke. Auf diese Weise kann insbesondere ein besonders kostengünstiges optisches System eingesetzt werden, da eine Verschmutzung des Abtastkopfes durch das Abschirmelement im Wesentlichen unterbleibt und damit eine mögliche Reinigung des Abtastkopfes vermieden werden kann.It may be advantageous if, in a scanning device according to the invention, the scanning head for optical scanning of the markers is formed on the format roller. For example, the scanning head may be an optical system in the form of a camera system or other optical sensors. The optical markers are for example geometric shapes, for example triangles or other polygons. In this way, in particular, a particularly cost-effective optical system can be used, since contamination of the scanning head by the shielding substantially omitted and thus a possible cleaning of the scanning head can be avoided.
Ein weiterer Vorteil kann dadurch erzielt werden, dass bei einer erfindungsgemäßen Abtastvorrichtung zumindest ein Parksensor im Bereich der Parkposition angeordnet ist, um die Positionierung des Abtastkopfes in der Parkposition zu erkennen. Dabei kann es sich zum Beispiel um einen induktiven Sensor handeln. Selbstverständlich sind auch andere Sensorarten, wie zum Beispiel einfache mechanische Schalter, optische Sensoren, wie Lichtschranken, oder Ähnliches denkbar. Die Sensorik für die Wahrnehmung der Einnehmung der Parksituation dient dazu, die Verwendung einer erfindungsgemäßen Abtastvorrichtung noch sicherer zu gestalten. So kann zum Beispiel diese Information des Sensors dazu verwendet werden, dass der anschließende Druckvorgang erst dann beginnen kann, wenn sich eine oder alle Abtastköpfe von einer Vielzahl von Abtastvorrichtungen in der jeweiligen Parkposition befinden. Damit kann nicht nur die Abschirmung in effizienter Weise für eine beziehungsweise alle Abtastvorrichtungen einer Druckmaschine mit höherer Sicherheit gewährleistet werden, sondern darüber hinaus auch die Wahrscheinlichkeit einer Kollision zwischen den Abtastkopf und einer oder mehrerer Walzen vermieden werden. Eine derartige Kollision könnte sonst zu einer Beschädigung der Walze führen, welche den Austausch der Walze erfordern würde. Auf diese Weise wird die Walze also zusätzlich geschützt. Auch ist sichergestellt, dass der Abtastkopf zum Start des Druckverfahrens abgeschirmt ist.A further advantage can be achieved in that in a scanning device according to the invention at least one parking sensor is arranged in the parking position in order to detect the positioning of the scanning head in the parking position. This may be, for example, an inductive sensor. Of course, other types of sensors, such as simple mechanical switches, optical sensors, such as photoelectric sensors, or the like are conceivable. The sensor for the perception of the perception of the parking situation serves to make the use of a scanning device according to the invention even safer. For example, this information from the sensor can be used so that the subsequent printing process can not begin until one or all scanning heads of a plurality of scanning devices are in the respective parking position. Thus, not only can the shielding be efficiently ensured for one or all scanning devices of a printing press with higher security, but also the probability of a collision between the scanning head and one or more rollers can be avoided. Such a collision could otherwise lead to damage of the roller, which would require the replacement of the roller. In this way, the roller is thus additionally protected. It is also ensured that the scanning head is shielded to start the printing process.
Ein weiterer Vorteil ist es, wenn bei einer erfindungsgemäßen Abtastvorrichtung das Abschirmelement ein separates Gehäuse für den Abtastkopf in der Parkposition ausbildet. Das separate Gehäuse kann auch als Garage beziehungsweise separate Garage bezeichnet werden. Damit ist ein Gehäuse vorgesehen, in welches der Abtastkopf zumindest teilweise oder vollständig einfährt. Ein Abschirmen erfolgt somit zumindest von zwei Spritzrichtungen aus Sicht des Druckbereichs. Damit erfolgt eine noch effizientere Abschirmung, die die Gefahr von Verschmutzungen des Abtastkopfes noch weiter minimiert. Insbesondere wird der Abtastkopf im Wesentlichen vollständig, also insbesondere von allen bis auf eine Seite vollständig umschlossen. Auch bewegliche Teile des Abschirmelementes, die nach Einnehmen des Abtastkopfes in der Parkposition in eine Abschirmposition bewegt werden, können im Rahmen der vorliegenden Erfindung vorteilhaft sein. So kann im Sinne eines sich schließenden Garagentores dieses Gehäuse geschlossen werden, um in der Parkposition eine optimale Abschirmung des Abtastkopfes zur Verfügung zu stellen.A further advantage is when, in a scanning device according to the invention, the shielding element forms a separate housing for the scanning head in the parking position. The separate housing can also be referred to as a garage or separate garage. Thus, a housing is provided, in which the scanning head at least partially or completely retracts. Shielding thus takes place at least from two spraying directions from the perspective of the printing area. This results in an even more efficient shielding, which further minimizes the risk of contamination of the scanning head. In particular, the scanning head is substantially completely enclosed, that is to say completely enclosed by all but one side. Movable parts of the shielding element, which are moved to a shielding position after the scanning head has been moved into the parking position, can also be advantageous in the context of the present invention. Thus, in the sense of a closing garage door, this housing can be closed in order to provide optimal shielding of the scanning head in the parking position.
Ebenfalls vorteilhaft ist es, wenn bei einer erfindungsgemäßen Abtastvorrichtung der Antrieb zumindest einen Hubkolben aufweist, wobei über ein Getriebe die lineare Bewegung des Hubkolbens in eine Drehbewegung umgewandelt wird. Das Verwenden eines Hubkolbens im Vergleich zu Elektromotoren bringt den Vorteil mit sich, dass eine erfindungsgemäße Abtastvorrichtung deutlich kostengünstiger ausgestaltet werden kann. So finden Druckvorgänge häufig im explosionsgefährdeten Bereich (EX-Bereich) statt, da die Druckfarben häufig brennbar beziehungsweise explosive Stoffe sind. Dementsprechend handelt sich um einen so genannten EX-Bereich. Bei Elektromotoren bedeutet dies eine besonders teure Ausführungsform als EX-geschützte Ausführungsform des Elektromotors. EX-geschützte Hubkolben sind deutlich kostengünstiger und im Vergleich zu den Investitionskosten ähnlich beziehungsweise identisch zu "normalen" Hubkolben. Die Hubkolben sind vorzugsweise pneumatisch betrieben. Darüber hinaus können Hubkolben mit deutlich geringerem Platzbedarf und auch mit weniger Steuerbeziehungsweise Regelaufwand bei einer erfindungsgemäßen Abtastvorrichtung eingesetzt werden. Das Getriebe ist vorzugsweise derart ausgestaltet, dass eine exzentrische Scheibenanbindung erfolgt. Durch einen exzentrischen Stift kann die Linearbewegung des kippbar beziehungsweise schwenkbar gelagerten Kolbens in die gewünschte Rotationsbewegung für das Verschwenken des Abtastarms umgewandelt werden.It is also advantageous if, in a scanning device according to the invention, the drive has at least one lifting piston, wherein the linear movement of the lifting piston is converted into a rotational movement by means of a gear. The use of a reciprocating piston in comparison to electric motors has the advantage that a scanning device according to the invention can be made significantly less expensive. For example, printing processes often take place in the potentially explosive area (EX area), since the printing inks are often combustible or explosive substances. Accordingly, it is a so-called EX area. For electric motors, this means a particularly expensive embodiment as EX-protected embodiment of the electric motor. EX-protected reciprocating pistons are significantly cheaper and, in comparison to the investment costs, similar or identical to "normal" reciprocating pistons. The reciprocating pistons are preferably operated pneumatically. In addition, reciprocating with significantly less space and also with less Steuerbeziehungsweise control effort in a scanning device according to the invention be used. The transmission is preferably designed such that an eccentric disk connection takes place. By an eccentric pin, the linear movement of the tiltably or pivotally mounted piston can be converted into the desired rotational movement for the pivoting of the Abtastarms.
Ebenfalls vorteilhaft ist es, wenn bei einer erfindungsgemäßen Abtastvorrichtung der Antrieb einen Zahnriemen aufweist, welcher die Schwenkbewegung des Abtastarms durchführt. Der Zahnriemen führt ebenfalls zu reduzierten Platzbedarf bei einer erfindungsgemäßen Abtastvorrichtung. Darüber hinaus wird der Wartungsbedarf bei der Verwendung eines Zahnriemens deutlich reduziert. Auch hinsichtlich Kosten ist ein Zahnriemen günstiger als zum Beispiel die Verwendung eines Getriebes aus Zahnrädern. Durch das Verwenden eines Zahnriemens können darüber hinaus auch komplexe Schwenkbewegungen, wie zum Beispiel relativ große Schwenkradien beziehungsweise komplexe Kurvenverläufe für die Schwenkbewegung des Abtastkopfes möglich werden. Auch das Verwenden eines Zahnriemens aus einem Kunststoffmaterial, welches insbesondere elektrisch leitend ausgebildet ist, ist mit Bezug auf eine mögliche Explosionsgefahr im Einsatzbereich der Abtastvorrichtung von Vorteil.It is also advantageous if, in a scanning device according to the invention, the drive has a toothed belt which carries out the pivoting movement of the scanning arm. The toothed belt also leads to reduced space requirements in a scanning device according to the invention. In addition, the need for maintenance when using a toothed belt is significantly reduced. Also in terms of cost, a timing belt is cheaper than, for example, the use of a transmission of gears. In addition, by using a toothed belt complex pivoting movements, such as relatively large pivoting radii or complex curves for the pivoting movement of the scanning head can be possible. Also, the use of a toothed belt made of a plastic material, which is in particular electrically conductive, is with respect to a possible danger of explosion in the application of the scanning advantage.
Ein weiterer Vorteil kann dadurch erzielt werden, dass bei einer erfindungsgemäßen Abtastvorrichtung zumindest eine Spannvorrichtung, insbesondere ein Spannrad, für das Spannen des Zahnriemens vorgesehen ist. Damit kann vorzugsweise ein manuelles Spannen per Hand erfolgen, um den Zahnriemen in die gewünschte Einsatzspannung zu bringen. Dies erfolgt insbesondere beim Austausch einzelner Komponenten der Abtastvorrichtung beziehungsweise bei der ersten Einstellung der Abtastvorrichtung. Auch ein Austausch des Abtastkopfes beziehungsweise ein Kalibrieren des Abtastkopfes kann zu einem notwendigen Nachspannen des Zahnriemens führen.A further advantage can be achieved in that in a scanning device according to the invention at least one clamping device, in particular a tensioning wheel, is provided for tensioning the toothed belt. This can preferably be done manually by hand to bring the timing belt in the desired threshold voltage. This is done in particular when replacing individual components of the scanning device or at the first setting of the scanning device. Also, an exchange of the scanning head or a calibration of the scanning head can lead to a necessary retightening of the toothed belt.
Ein weiterer Gegenstand der vorliegenden Anmeldung ist eine Druckmaschine mit einem Druckbereich, aufweisend eine Einhausung für den Druckbereich, in welcher um eine Gegendruckwalze herum zumindest zwei Farbwerke mit jeweils einer Formatwalze und einer Rasterwalze im Kontakt zur Gegendruckwalze angeordnet sind. Eine erfindungsgemäße Druckmaschine zeichnet sich dadurch aus, dass für jedes Farbwerk, insbesondere für jede Formatwalze, zumindest eine erfindungsgemäße Abtastvorrichtung vorgesehen ist. Die Einhausung kann insbesondere als mechanisch stabilisierendes Gerüst für die Lagerung der Walzen beziehungsweise der Farbwerke zu verstehen. Sie dient darüber hinaus für die Abgrenzung des Druckbereichs von der Umgebung. Wie bereits in der Einleitung zu dieser Anmeldung erläutert worden ist, handelt es sich bei einer solchen Druckmaschine um eine Mehrfarbdruckmaschine, bei welcher durch das Vermischen unterschiedlicher Grundfarben eine Vielzahl von Mischfarben erzielt werden kann. Um diese einzelnen verschieden farbigen Druckbilder sauber übereinanderlegen zu können, müssen mittels der Abtastvorrichtung die einzelnen Formatwalzen hinsichtlich ihrer Rotationsposition und Seitenposition zueinander ausgerichtet werden. Das Verwenden einer erfindungsgemäßen Abtastvorrichtung führt demnach zu den gleichen Vorteilen, wie sie ausführlich mit Bezug auf eine erfindungsgemäße Abtastvorrichtung erläutert worden sind.A further subject of the present application is a printing machine with a printing area, comprising an enclosure for the printing area, in which at least two inking units, each with a format roller and an anilox roller, are arranged around a counterpressure roller in contact with the counterpressure roller. A printing press according to the invention is characterized in that, for each inking unit, in particular for each format roller, at least one scanning device according to the invention is provided. The housing can be understood in particular as a mechanically stabilizing framework for the storage of the rollers or the inking units. It also serves to delimit the print area from the environment. As has already been explained in the introduction to this application, such a printing press is a multi-color printing press in which a multiplicity of mixed colors can be achieved by mixing different primary colors. In order to be able to superimpose these individual differently colored printed images neatly, the individual format rollers must be aligned with respect to their rotational position and lateral position with respect to one another by means of the scanning device. The use of a scanning device according to the invention thus leads to the same advantages as have been explained in detail with reference to a scanning device according to the invention.
Eine erfindungsgemäße Druckmaschine kann dahingehend weitergebildet sein, dass der Abtastkopf der Abtastvorrichtung in der Parkposition von der Formatwalze weggerichtet ist. Die konträre Ausrichtung mit Bezug auf die Formatwalze bringt eine noch weiter verbesserte Abschirmung mit sich. Insbesondere ragt dabei die Abtastvorrichtung beziehungsweise der Abtastkopf aus dem Druckbereich heraus, so dass auch eine örtliche Beabstandung zwischen Formatwalze und Abtastkopf vorliegt. Die konträre Ausrichtung wird zum Beispiel durch einen Schwenkbereich zwischen ca. 0° und ca. 180°, insbesondere von ca. 165° erzielt.A printing press according to the invention can be developed in such a way that the scanning head of the scanning device is directed away from the format roller in the parking position. The contra-orientation with respect to the form roller results in even further improved shielding. In particular, the scanning device or the scanning head projects out of the printing area, so that there is also a spatial spacing between the format roller and the scanning head. The opposite orientation is achieved, for example, by a pivoting range between about 0 ° and about 180 °, in particular of about 165 °.
Ebenfalls vorteilhaft kann es sein, wenn bei einer erfindungsgemäßen Druckmaschine die Abtastvorrichtung mit Bezug auf die Farbwerke und die Gegendruckwalze zumindest teilweise auf der Außenseite der Einhausung angeordnet ist. Damit bildet sozusagen die Einhausung zumindest einen Teil des Abschirmelementes der Abtastvorrichtung. Insbesondere kann auf ein zusätzliches Gehäuse, wie zum Beispiel eine "Garage", für die Abtastvorrichtung als Abschirmelement verzichtet werden. Damit wird die Gesamtkonstruktion noch kostengünstiger hinsichtlich der Montage und der Ausführung. Der Abtastarm kann zum Beispiel durch eine Öffnung in der Einhausung Ein- und Ausschwenken, so dass sich die Abtastposition und die Parkposition auf unterschiedlichen Seiten der Einhausung befinden. Auch bei möglichen Austauscharbeiten der Walzen im Inneren der Einhausung kann auf diese Weise ein verbesserter Schutz der gesamten Abtastvorrichtung erzielt werden.It may also be advantageous if, in a printing machine according to the invention, the scanning device with respect to the inking units and the counterpressure roller is arranged at least partially on the outside of the housing. Thus, as it were, the housing forms at least part of the screening element of the scanning device. In particular, can be dispensed with an additional housing, such as a "garage" for the scanning as a shielding. This makes the overall design even more cost-effective in terms of installation and execution. The scanning arm can be pivoted in and out, for example, through an opening in the housing, so that the scanning position and the parking position are located on different sides of the housing. Also with possible replacement work of the rollers in Inside the enclosure can be achieved in this way an improved protection of the entire scanning device.
Ebenfalls vorteilhaft ist es, wenn bei einer erfindungsgemäßen Druckmaschine zumindest die Parkposition des Abtastkopfes auf der Außenseite der Einhausung angeordnet ist. Dies ist eine Variante der voranstehenden Ausführungsform, bei welcher zumindest Teile der Abtastvorrichtung auch innerhalb der Einhausung, also im Druckbereich der Druckmaschine, angeordnet sein können. Die Vorteile, wie sie im voranstehenden Absatz erläutert worden sind, sind grundsätzlich auch durch diese Ausführungsform erzielbar.It is also advantageous if, in a printing press according to the invention, at least the parking position of the scanning head is arranged on the outside of the housing. This is a variant of the preceding embodiment in which at least parts of the scanning device can also be arranged within the housing, that is to say in the printing area of the printing press. The advantages, as have been explained in the preceding paragraph, are basically also achievable by this embodiment.
Ebenfalls Gegenstand der vorliegenden Erfindung ist ein Druckverfahren für eine Druckmaschine mit einer Abtastvorrichtung für Marker auf einer Walze, insbesondere einer Formatwalze oder Druckwalze, im Druckbereich einer Druckmaschine. Ein erfindungsgemäßes Druckverfahren zeichnet sich dadurch aus, dass ein Abtastkopf der Abtastvorrichtung mit einem Abtastarm für die Kalibrierung einer Formatwalze in einer Abtastposition und für die Durchführung des Druckens in eine Parkposition geschwenkt wird. In der Parkposition ist der Abtastkopf gegen den Druckbereich der Druckmaschine abgeschirmt. Ein erfindungsgemäßes Druckverfahren wird vorzugsweise für eine Abtastvorrichtung gemäß der vorliegenden Erfindung beziehungsweise für eine erfindungsgemäße Druckmaschine durchgeführt. Dementsprechend bringt ein solches Druckverfahren auch die gleichen Vorteile mit sich, wie sie ausführlich mit Bezug auf eine erfindungsgemäße Druckmaschine beziehungsweise mit Bezug auf eine erfindungsgemäße Abtastvorrichtung erläutert worden sind.Likewise provided by the present invention is a printing method for a printing machine with a scanning device for markers on a roller, in particular a format roller or pressure roller, in the printing area of a printing press. A printing method according to the invention is characterized in that a scanning head of the scanning device is pivoted with a scanning arm for the calibration of a format roller in a scanning position and for carrying out the printing in a parking position. In the parking position, the scanning head is shielded against the printing area of the printing press. A printing method according to the invention is preferably carried out for a scanning device according to the present invention or for a printing press according to the invention. Accordingly, such a printing method also brings about the same advantages as have been explained in detail with reference to a printing press according to the invention or with reference to a scanning device according to the invention.
Ein erfindungsgemäßes Druckverfahren kann dahingehend weitergebildet sein, dass in einem ersten Schritt die Abtastung der Marker auf der Walze durch den Abtastkopf in einer Abtastposition, in einem zweiten Schritt das Verschwenken des Abtastkopfes in die Parkposition und in einem dritten Schritt die Durchführung des Druckens erfolgt. Mit anderen Worten erfolgt die Abtastung unabhängig vom Drucken. Das Drucken startet erst, nachdem der Abtastvorgang vollständig abgeschlossen ist. Insbesondere durch das Sicherstellen, dass das Drucken erst nach Erreichen der Parkposition durch den Abtastkopf gestartet wird, kann der Schutz des Abtastkopfes in erfindungsgemäßer Weise noch weiter verbessert werden.A printing method according to the invention can be further developed such that in a first step the scanning of the markers on the roller by the scanning head in a scanning position, in a second step, the pivoting of the scanning head in the parking position and in a third step, the implementation of the printing. In other words, scanning is independent of printing. Printing will not start until after the scan is complete. In particular, by ensuring that the printing is started only after reaching the parking position by the scanning head, the protection of the scanning head in accordance with the invention can be further improved.
Die vorliegende Erfindung wird näher erläutert anhand der beigefügten Zeichnungsfiguren. Die dabei verwendeten Begrifflichkeiten "links", "rechts", "oben" und "unten" beziehen sich auf eine Ausrichtung der Zeichnungsfiguren mit normal lesbaren Bezugszeichen. Es zeigen schematisch:
- Figur 1
- eine erste Ausführungsform einer erfindungsgemäßen Abtastvorrichtung und eine erfindungsgemäße Druckmaschine in der Seitenansicht,
- Figur 2
- die Ausführungsform der
Figur 1 in Draufsicht, - Figur 3
- die Ausführungsform der
Figur 2 in größerem Detailgrad, - Figur 4
- die Ausführungsform der
Figur 3 mit dem Abtastkopf in Parkposition und - Figur 5
- eine Prinzipskizze einer erfindungsgemäßen Druckmaschine.
- FIG. 1
- A first embodiment of a scanning device according to the invention and a printing press according to the invention in side view,
- FIG. 2
- the embodiment of the
FIG. 1 in plan view, - FIG. 3
- the embodiment of the
FIG. 2 in greater detail, - FIG. 4
- the embodiment of the
FIG. 3 with the scanning head in parking position and - FIG. 5
- a schematic diagram of a printing machine according to the invention.
In
Die Ausrichtung der Rotationsposition sowie der Seitenausrichtung der Formatwalzen 110 erfolgt durch eine Abtastvorrichtung 10, wie sie zum Beispiel in den
Um das Verschwenken des Abtastarms 20 gewährleisten zu können, ist ein Antrieb 30 vorgesehen. Dieser Antrieb 30 ist bei dieser Ausführungsform mit einem Hubkolben 32 ausgestattet. Dieser Hubkolben 32 ist an einem Ende drehbar gelagert und an seinem gegenüberliegenden Ende mit einer Drehscheibe exzentrisch verbunden. Damit kann die Drehscheibe als Getriebe 34 verstanden werden, welches die Linearbewegung des Hubkolbens 32 in die gewünschte Rotationsbewegung für den Abtastarm 22 umwandelt.In order to ensure the pivoting of the
Für die weitere Übertragung der Kraft vom Antrieb 30 auf den Abtastarm 20 ist ein Zahnriemen 36 vorgesehen. Dieser Zahnriemen 36 wird über eine Spannvorrichtung 38 in Form einer Stellschraube gespannt. Über den Zahnriemen 36 wird die Rotationskraft für den Schwenkbetrieb zwischen der Abtastposition A und der Parkposition P zur Verfügung gestellt.For the further transmission of the force from the
Befindet sich der Abtastvorgang in Betrieb, so ist der Abtastarm 20 in die Position geschwenkt, wie sie in
In der Parkposition P ist der Abtastkopf 22 vom Druckbereich 100 der Druckmaschine 200 abgeschirmt. Hierfür ist ein Abschirmelement 40 vorgesehen. Das Abschirmelement 40 kann zumindest bei manchen Ausführungsformen ausschließlich durch die Einhausung 150 ausgebildet sein. Dies ist zum Beispiel in den
Wie ebenfalls aus der
Die voranstehenden Erläuterungen der Ausführungsformen beschreiben die vorliegende Erfindung nur im Rahmen von Beispielen. Selbstverständlich können technische Merkmale der einzelnen Ausführungsformen, sofern technisch sinnvoll, frei miteinander kombiniert werden, ohne den Rahmen der vorliegenden Erfindung zu verlassen.
Claims (14)
- Sensing apparatus (10) for marks on a roll, in particular a format roll (110), in the printing region (100) of a printing press (200), having a pivotable sensing arm (20) with a sensing head (22) for sensing the marks and a drive (30) for pivoting the sensing arm (20) between a sensing position (A) and a parked position (P), it being possible for the sensing head (22) to be shielded in the parked position (P) by at least one shielding element (40) with respect to the printing region (100) of the printing press (200), characterized in that the pivoting takes place on a circular path or a partially circular path, the pivoting region between the sensing position (A) and the parked position (P) lying in the range between approximately 0° and approximately 180°.
- Sensing apparatus (10) according to Claim 1, characterized in that the sensing head (22) is configured for optically sensing the marks on the format roll (110).
- Sensing apparatus (10) according to either of the preceding cairns, characterized in that at least one parking sensor (50) is arranged in the region of the parked position (P), I in order to detect the positioning of the sensing head (22) in the parked position (P).
- Sensing apparatus (10) according to one of the preceding claims, characterized in that the shielding element (4D) forms a separate housing for the sensing head (22) in the parked position (P).
- Sensing apparatus (10) according to one of the preceding claims, characterized in that the drive (30) has at least one reciprocating piston (32), the linear movement of the reciprocating piston (32) being converted into a rotational movement via a gear mechanism (34).
- Sensing apparatus (10) according to one of the preceding claims, characterized in that the drive (30) has a toothed belt (36) which carries out the pivoting movement of the sensing arm (20).
- Sensing apparatus (10) according to Claim 6, characterized in that at least one tensioning apparatus (38), in particular a tensioning wheel, is provided for tensioning the toothed belt (36).
- Printing press (200) having a printing region (100), having an enclosure (150) for the printing region (100), in which enclosure (150) at least two inking units (140) are arranged around a back-pressure roll (130), with in each case one format roll (110) and one anilox roll (120) in contact with the back-pressure roll (130), characterized in that at least one sensing apparatus (10) having the features of one of Claims 1 to 7 is provided for each inking unit, in particular for each format roll (110).
- Printing press (200) according to Claim 8, characterized in that the sensing head (20) of the sensing apparatus (10) is directed away from the format roll (110) in the parked position (P).
- Printing press (200) according to either of Claims 8 and 9, characterized in that the sensing apparatus (10) is arranged at least partially on the outer side of the enclosure (iso) in relation to the inking units (140) and the back-pressure roll (130).
- Printing press (200) according to Claim 10, characterized in that at least the parked position (P) of the sensing head (22) is arranged on the outer side of the enclosure (150).
- Printing method for a printing press (200) having a sensing apparatus (10) for marks on a roll, in particular a format roll (110), in the printing region (100) of a printing press (200), a sensing head (22) of the sensing apparatus (10) being pivoted by way of a sensing arm (20) into a sensing position (A) for the calibration of a format roll (110) and for carrying out printing into a parked position (P), in which the sensing head (22) is shielded with respect to the printing region (100) of the printing press (200), characterized in that the pivoting takes place on a circular path or a partially circular path, the pivoting region between the sensing position (A) and the parked position (P) lying in the range between approximately 0° and approximately zu.
- Printing method according to Claim 12, characterized in that the sensing of the marks on the roll by way of the sensing head (22) in the sensing position (A) takes place in a first step, the pivoting of the sensing head (22) into the parked position (P) takes place in a second step, and the printing is carried out in a third step.
- Printing method according to either of Claims 12 and z.3, characterized in that it is carried out for a sensing apparatus (10) having the features of one of Claims 1 to 7 or for a printing press (200) having the features of one of Claims 8 to 11.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011056143.9A DE102011056143B4 (en) | 2011-12-07 | 2011-12-07 | Scanning device for markers on a roller of a printing machine, printing machine and printing process |
PCT/EP2012/074695 WO2013083722A2 (en) | 2011-12-07 | 2012-12-06 | Sensing device for markers on a roll of a printing press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2788193A2 EP2788193A2 (en) | 2014-10-15 |
EP2788193B1 true EP2788193B1 (en) | 2016-03-30 |
Family
ID=47326142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12798711.3A Active EP2788193B1 (en) | 2011-12-07 | 2012-12-06 | Sensing device for markers on a roll of a printing press |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2788193B1 (en) |
DE (1) | DE102011056143B4 (en) |
ES (1) | ES2575094T3 (en) |
WO (1) | WO2013083722A2 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3302798A1 (en) * | 1983-01-28 | 1984-08-02 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | DEVICE FOR PRESETTING PRINTING MACHINES |
DE4321177A1 (en) | 1993-06-25 | 1995-01-05 | Heidelberger Druckmasch Ag | Device for parallel image inspection and color control on a printed product |
DE102007059507B4 (en) | 2007-12-11 | 2012-01-26 | Fischer & Krecke Gmbh | Printing machine with roller sensor |
DE102009046566B4 (en) | 2009-11-10 | 2017-06-01 | Windmöller & Hölscher Kg | Body with a register marker field |
-
2011
- 2011-12-07 DE DE102011056143.9A patent/DE102011056143B4/en active Active
-
2012
- 2012-12-06 WO PCT/EP2012/074695 patent/WO2013083722A2/en active Application Filing
- 2012-12-06 EP EP12798711.3A patent/EP2788193B1/en active Active
- 2012-12-06 ES ES12798711.3T patent/ES2575094T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2013083722A3 (en) | 2013-09-06 |
DE102011056143A1 (en) | 2013-06-13 |
ES2575094T3 (en) | 2016-06-24 |
DE102011056143B4 (en) | 2021-08-19 |
WO2013083722A2 (en) | 2013-06-13 |
EP2788193A2 (en) | 2014-10-15 |
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