EP0861722B1 - Sensor for detecting cocked sheets - Google Patents
Sensor for detecting cocked sheets Download PDFInfo
- Publication number
- EP0861722B1 EP0861722B1 EP98101425A EP98101425A EP0861722B1 EP 0861722 B1 EP0861722 B1 EP 0861722B1 EP 98101425 A EP98101425 A EP 98101425A EP 98101425 A EP98101425 A EP 98101425A EP 0861722 B1 EP0861722 B1 EP 0861722B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- receiver
- transmitter
- sensor
- printing
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/02—Arrangements of indicating devices, e.g. counters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/14—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors by photoelectric feelers or detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/60—Optical characteristics, e.g. colour, light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
- B65H2553/412—Photoelectric detectors in barrier arrangements, i.e. emitter facing a receptor element
Definitions
- the invention relates to a sheet sensor arrangement for a sheet printing machine Turning device that has a gripper system to convey individual sheets.
- a storage drum for the temporary storage of sheets from a printing unit for Fine print as well as a turning drum included to get one on the storage drum cached sheets in the reverse conveying direction, d. H. with the previous one Trailing edge of the sheet leading to a subsequent printing unit for reverse printing.
- the storage drum and the turning drum each contain a gripper system for Hold a sheet on its leading or trailing edge.
- electropneumatic arc sensors for example sniffer pistons or interrogation suction devices, or electro-optical sheet sensors, For example, reflective sensors, which indicate the presence of the front edge or Trailing edge of a sheet at one or more points in the turning device feel. If the sheet is not detected, the pressure is switched off.
- the sensor For reliable operation, the sensor must be relatively close to the one running past it Bow be arranged. Since the sheet side printed in face-to-face printing on the Storage drum facing outside, there is a risk of smearing fresh Printing ink on the sensor, the larger the more the sheet flutters, the larger it is. By the Lubrication not only damages the fresh printed image, but also the sensor dirty. Optoelectronic sensors in particular therefore require frequent use Cleaning. To prevent smearing, you have sheet guide plates with you Air support used. However, these increase the design effort for the Printing machine without completely eliminating the problem of sensor contamination.
- Electropneumatic sensors are less susceptible to contamination than electro-optical sensors, but mechanically relatively complex. Since that Response behavior of such sensors on the printing speed and on the type of Depending on the substrate, frequent adjustment work is also required.
- the known sensors can often only in an unfavorable angular position be assembled, d. H. in a position where an incorrect sheet transfer is relatively late is recognized or there is only a very short time window for the sheet detection, so that the pressure shutdown is also relatively late.
- EP 0 058 285 A1 describes a control device for Record carriers known in printers. According to this device is located Transmitter and receiver are on the same side, on the opposite side two reflectors.
- the invention has for its object to provide a sheet sensor arrangement, the is less susceptible to contamination and mechanically simple and with the one Missed sheets can be recognized as early and safely as possible. Furthermore, everyone has to Printing materials (glossy papers, foils, black papers etc.) can be reliably recognized.
- This type of arrangement of the transmitter and receiver allows a light beam path that proceeding from the arch surface at a preferably acute angle.
- the time window for detecting the arc can be varied. For example, increasing the angle increases the Time window.
- the invention Arrangement of transmitter and receiver also advantageously allows this Detection of an arch arriving in a horizontally offset plane.
- the reflection light barrier or the reflection light sensor consists of transmitter and Receiver housed in the same housing on one side of the press are.
- the light emitted by the transmitter z. B. infrared or red light is from one on the triple reflector attached to the other side of the printing machine and thrown back to the housing of the receiver housed in the transmitter. If that ; Object breaks through the light beam, d. H. if the sensor receives no light it turns on Arc detected.
- the transmitter has a polarization filter, that of the emitted Light allows only one direction of polarization.
- the triple reflector depolarizes at Reflection the light, with a part of the light reflected back to the receiver one passes second polarization filter and can be recognized by the receiver.
- the Designing a light reflection barrier with a polarization filter enables also reliably detect reflective surfaces.
- the sheet sensor or the transmitter and receiver are outside the Sheet travel area, the sheet travel area corresponding to that to be printed Format may vary. However, it is necessary that the transmitter and receiver are each are further apart than the sheet format to be printed.
- the turning device shown in Fig. 1 is part of a sheet-fed printing press with a Printing cylinder 1 for straight printing and a printing cylinder 2 for reverse printing.
- the between the impression cylinder 1 for straight printing and the impression cylinder 2 for reverse printing arranged turning device comprises a storage drum 3 and one thereon adjacent reversing drum 4.
- the storage drum 3 has approximately that double the diameter of the impression cylinders 1, 2 and the turning drum 4.
- the Sheet turning area is preferably between the turning drum 4, the Storage drum 3 and the sheet transport area.
- FIG. 2 is a schematic perspective view of that in FIG. 1
- the sheet sensor 12, 13 is one of a Receiver 13 and a transmitter 12 existing sensor from the transmitter 12 Beam of light 15 emits to the receiver 13.
- Transmitter 12 and receiver 13 are between the turning drum 4 and the storage drum 3 attached. Both the transmitter 12 and the receiver 13 are also outside the transport area in which the Sheet 5 moves so that there is no collision between sheet 5 and either Receiver 13 or the transmitter 12 may arise. This allows the bow to be smear-free to be transported further.
- the light beam 15, which is between the transmitter 12 and the receiver 13 is, by appropriate arrangement of the receiver 13 and the transmitter 12 aligned that with an existing sheet 5, the grippers 8 of the Turning drum 4 is held, the sheet 5 theoretically penetrates in its plane. Preferably at an acute angle ⁇ 14. This is achieved by the transmitter 12 on the underside of the sheet with regard to the sheet transport path from the storage drum 3 is directed to the turning drum 4 and the receiver 13 above this level is arranged. A reverse arrangement of transmitter 12 and receiver 13 is also possible.
- Light beam 15 can both by moving the transmitter 12 or receiver 13 adjust horizontally as well as vertically. If the light beam hits an arc, it is recognized as a good arc (none Reception). If no sheet is recognized at the predetermined time, this is considered to be Missed sheet and the press performs the print shutdown.
- the sheet sensor 12, 13 is slidably arranged in the sheet turning area. By Moving the sheet sensor 12, 13 closer to the turning drum 4 or closer to Storage drum 3, the time when the sheet detection should take place can be set. Detection of sheets at an earlier time increases the remaining reaction time for pressure shutdown.
- the sensor is preferably attached as close as possible in the direction of the storage drum, however, in such a way that a missing sheet does not give a "good signal”.
- a turning device with double large storage drum 3 shown as an embodiment.
- the invention is not limited to this embodiment. Rather, the invention is of any kind can be used by bow turns.
Description
Die Erfindung betrifft eine Bogensensoranordnung für eine Bogendruckmaschine mit Wendeeinrichtung, die ein Greifersystem aufweist, um einzelne Bogen zu befördern.The invention relates to a sheet sensor arrangement for a sheet printing machine Turning device that has a gripper system to convey individual sheets.
Für Bogendruckmaschinen mit Schön- und Widerdruck gibt es Wendeeinrichtungen, die eine Speichertrommel zum Zwischenspeichern von Bogen aus einem Druckwerk für Schöndruck sowie eine Wendetrommel enthalten, um einen auf der Speichertrommel zwischengespeicherten Bogen in umgekehrter Förderrichtung, d. h. mit der früheren Bogenhinterkante voraus, einem nachfolgenden Druckwerk für Widerdruck zuzuführen. Die Speichertrommel und die Wendetrommel enthalten jeweils ein Greifersystem zum Festhalten eines Bogens an seiner Vorderkante bzw. Hinterkante.For sheetfed printing machines with face and back printing there are turning devices that a storage drum for the temporary storage of sheets from a printing unit for Fine print as well as a turning drum included to get one on the storage drum cached sheets in the reverse conveying direction, d. H. with the previous one Trailing edge of the sheet leading to a subsequent printing unit for reverse printing. The storage drum and the turning drum each contain a gripper system for Hold a sheet on its leading or trailing edge.
Für eine Kontrolle, ob ein Bogen in der Wendeeinrichtung korrekt übergeben wurde, gibt es im Stand der Technik verschiedenartige elektropneumatische Bogensensoren, beispielsweise Schnüffelkolben oder Abfragesauger, oder elektrooptische Bogensensoren, beispielsweise Reflexlichttaster, welche das Vorhandensein der Vorderkante oder Hinterkante eines Bogens an einer oder mehreren Stellen in der Wendeeinrichtung abfühlen. Falls der Bogen nicht detektiert wird, erfolgt eine Druckabschaltung.For a check whether a sheet in the turning device was handed over correctly there are various electropneumatic arc sensors in the prior art, for example sniffer pistons or interrogation suction devices, or electro-optical sheet sensors, For example, reflective sensors, which indicate the presence of the front edge or Trailing edge of a sheet at one or more points in the turning device feel. If the sheet is not detected, the pressure is switched off.
Alle bekannten Bogensensoren haben zumindest einige der folgenden Nachteile.All known sheet sensors have at least some of the following disadvantages.
Für eine zuverlässige Funktion muß der Sensor relativ nahe am daran vorbeilaufenden Bogen angeordnet sein. Da die im Schöndruck bedruckte Bogenseite auf der Speichertrommel nach außen weist, besteht die Gefahr des Abschmierens von frischer Druckfarbe am Sensor, die um so größer ist, je mehr der Bogen flattert. Durch das Abschmieren wird nicht nur das frische Druckbild verletzt, sondern auch der Sensor verschmutzt. Insbesondere optoelektronische Sensoren bedürfen daher daher einer häufigen Reinigung. Um das Abschmieren zu verhindern, hat man Bogenleitbleche mit Luftunterstützung verwendet. Diese erhöhen jedoch den konstruktiven Aufwand für die Druckmaschine, ohne das Problem der Sensorverschmutzung vollständig zu beseitigen.For reliable operation, the sensor must be relatively close to the one running past it Bow be arranged. Since the sheet side printed in face-to-face printing on the Storage drum facing outside, there is a risk of smearing fresh Printing ink on the sensor, the larger the more the sheet flutters, the larger it is. By the Lubrication not only damages the fresh printed image, but also the sensor dirty. Optoelectronic sensors in particular therefore require frequent use Cleaning. To prevent smearing, you have sheet guide plates with you Air support used. However, these increase the design effort for the Printing machine without completely eliminating the problem of sensor contamination.
Elektropneumatische Sensoren sind zwar weniger verschmutzungsanfällig als elektrooptische Sensoren, jedoch mechanisch verhältnismäßig aufwendig. Da das Ansprechverhalten solcher Sensoren von der Druckgeschwindigkeit und von der Art des Bedruckstoffes abhängt, sind außerdem häufige Justierungsarbeiten erforderlich.Electropneumatic sensors are less susceptible to contamination than electro-optical sensors, but mechanically relatively complex. Since that Response behavior of such sensors on the printing speed and on the type of Depending on the substrate, frequent adjustment work is also required.
Schließlich können die bekannten Sensoren häufig nur in einer ungünstigen Winkellage montiert werden, d. h. in einer Lage, in der eine inkorrekte Bogenübergabe relativ spät erkannt wird oder nur ein sehr kurzes Zeitfenster für die Bogenerkennung vorhanden ist, so daß die Druckabschaltung ebenfalls verhältnismäßig spät erfolgt.Finally, the known sensors can often only in an unfavorable angular position be assembled, d. H. in a position where an incorrect sheet transfer is relatively late is recognized or there is only a very short time window for the sheet detection, so that the pressure shutdown is also relatively late.
Aus dem Stand der Technik ist gemäß DE 33 28 843 A1 vorgeschlagen, zur Kontrolle der Bogenübergabe bei Rotationsdruckmaschinen einen außerhalb der rotierenden Systeme angeordneten Sensor einzusetzen. Dabei sitzen eine Sende- und eine Empfangseinrichtung im Maschinengestell, wobei deren Verbindungslinie und die Bogenführungsbahn einen gemeinsamen Punkt haben.According to DE 33 28 843 A1, it is proposed from the prior art for control purposes the sheet transfer in rotary printing presses outside of the rotating one Systems arranged sensor to use. There are one broadcast and one Receiving device in the machine frame, the connecting line and the Arch guideway have a common point.
Weiterhin ist aus der EP 0 058 285 A1 eine Kontrolleinrichtung für Aufzeichnungsträger in Druckern bekannt. Gemäß dieser Vorrichtung befindet sich Sender und Empfänger auf derselben Seite, auf der gegenüberliegenden Seite befinden sich zwei Reflektoren.Furthermore, EP 0 058 285 A1 describes a control device for Record carriers known in printers. According to this device is located Transmitter and receiver are on the same side, on the opposite side two reflectors.
Der Erfindung liegt die Aufgabe zugrunde, eine Bogensensoranordnung zu schaffen, die wenig verschmutzungsanfällig und mechanisch einfach aufgebaut ist und mit der ein Fehlbogen möglichst frühzeitig und sicher erkannt werden kann. Desweiteren müssen alle Bedruckstoffe (glänzende Papiere, Folien, schwarze Papiere usw.) sicher erkannt werden. The invention has for its object to provide a sheet sensor arrangement, the is less susceptible to contamination and mechanically simple and with the one Missed sheets can be recognized as early and safely as possible. Furthermore, everyone has to Printing materials (glossy papers, foils, black papers etc.) can be reliably recognized.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst, vorteilhafte
Ausgestaltungen ergeben sich durch die abhängigen Ansprüche 2 bis 4. This object is achieved by the features of claim 1, advantageous configurations result from the
Diese Art der Anordnung von Sender und Empfänger läßt einen Lichtstrahlverlauf zu, der ausgehend von der Bogenfläche in einem vorzugsweisen spitzen Winkel verläuft. Durch Veränderung der Winkel kann das Zeitfenster zur Erkennung des Bogens variiert werden. So bewirkt beispielsweise ein Steilerstellen des Winkels eine Vergrößerung des Zeitfensters. Ein Bogen kann mittels dieser Anordnung sicherer erkannt werden, als bei einem parallel zur Bogenfläche verlaufenden Lichtstrahl. Die erfindungsgemäße Anordnung von Sender und Empfänger ermöglicht in vorteilhafter Weise auch das Erkennen eines in horizontal versetzter Ebene ankommenden Bogens.This type of arrangement of the transmitter and receiver allows a light beam path that proceeding from the arch surface at a preferably acute angle. By Changing the angle, the time window for detecting the arc can be varied. For example, increasing the angle increases the Time window. With this arrangement, a sheet can be detected more reliably than in the case of a beam of light running parallel to the arc surface. The invention Arrangement of transmitter and receiver also advantageously allows this Detection of an arch arriving in a horizontally offset plane.
Die Reflexionslichtschranke bzw. der Reflexionslichtsensor besteht aus Sender und Empfänger, die in gleichem Gehäuse auf einer Seite der Druckmaschine untergebracht sind. Das vom Sender ausgesandte Licht z. B. Infrarot oder Rotlicht wird von einem auf der anderen Seite der Druckmaschine angebrachten Tripel-Reflektor aufgenommen und zum Gehäuse des im Sender untergebrachten Empfängers zurückgeworfen. Wenn das ; Objekt den Lichtstrahl durchbricht, d. h. wenn der Sensor kein Licht empfängt wird ein Bogen detektiert. Der Sender weist ein Polarisationsfilter auf, der vom ausgesandten Licht nur eine Polarisationsrichtung zuläßt. Der Tripel-Reflektor depolarisiert bei der Reflexion das Licht, wobei ein Teil des zum Empfänger zurückreflektierten Lichtes einen zweiten Polarisationsfilter passiert und vom Empfänger erkannt werden kann. Die Ausgestaltung einer Lichtreflexionsschranke mit Polarisationsfilter ermöglicht es, auch spiegelnde Oberflächen sicher zu detektieren.The reflection light barrier or the reflection light sensor consists of transmitter and Receiver housed in the same housing on one side of the press are. The light emitted by the transmitter z. B. infrared or red light is from one on the triple reflector attached to the other side of the printing machine and thrown back to the housing of the receiver housed in the transmitter. If that ; Object breaks through the light beam, d. H. if the sensor receives no light it turns on Arc detected. The transmitter has a polarization filter, that of the emitted Light allows only one direction of polarization. The triple reflector depolarizes at Reflection the light, with a part of the light reflected back to the receiver one passes second polarization filter and can be recognized by the receiver. The Designing a light reflection barrier with a polarization filter enables also reliably detect reflective surfaces.
Durch die Verwendung eines selbstkalibrierenden Sensors werden die Wartungs- und Reinigungsintervalle verlängert, und ein Sensorausfall sofort angezeigt, was sich in vorteilhafter Weise auswirkt. Auch ist es möglich, die selbstkalibrierenden Sensoren bei jeder Maschinenumdrehung auf Funktionssicherheit zu überprüfen. By using a self-calibrating sensor, the maintenance and Cleaning intervals are extended, and a sensor failure immediately shows what is in has an advantageous effect. It is also possible to add the self-calibrating sensors Check functional reliability for every machine revolution.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung und aus der Zeichnung, auf die Bezug genommen wird.Further features and advantages of the invention will appear from the following Description and from the drawing to which reference is made.
Der Bogensensor bzw. der Sender und Empfänger liegen außerhalb des Bogenlaufbereiches, wobei der Bogenlaufbereich entsprechend dem zu bedruckenden Format variieren kann. Jedoch ist es erforderlich, daß Sender und Empfänger jeweils weiter auseinander liegen als das zu bedruckende Bogenformat.The sheet sensor or the transmitter and receiver are outside the Sheet travel area, the sheet travel area corresponding to that to be printed Format may vary. However, it is necessary that the transmitter and receiver are each are further apart than the sheet format to be printed.
In der Zeichnung zeigen:
- Fig. 1
- eine Seitenansicht einer Wendeeinrichtung in einer Bogendruckmaschine,
- Fig. 2
- eine schematische Perspektivansicht der Wendetrommel und der Speichertrommel der in Fig. 1 gezeigten Wendeeinrichtung.
- Fig. 1
- a side view of a turning device in a sheet-fed printing machine,
- Fig. 2
- is a schematic perspective view of the turning drum and the storage drum of the turning device shown in Fig. 1.
In der Figuren sind gleiche oder funktionsgleiche Teile überall mit den gleichen Bezugszeichen bezeichnet.In the figures, identical or functionally identical parts are the same everywhere Reference numerals.
Die in Fig. 1 gezeigte Wendeeinrichtung ist Teil einer Bogendruckmaschine mit einem
Druckzylinder 1 für Schöndruck und einem Druckzylinder 2 für Widerdruck. Die
zwischen dem Druckzylinder 1 für Schöndruck und dem Druckzylinder 2 für Widerdruck
angeordnete Wendeeinrichtung umfaßt eine Speichertrommel 3 und eine daran
angrenzend angeordnete Wendetrommel 4. Die Speichertrommel 3 hat ungefähr den
doppelten Durchmesser wie die Druckzylinder 1, 2 und die Wendetrommel 4. Der
Bogenwendebereich liegt vorzugsweise zwischen der Wendetrommel 4, der
Speichertrommel 3 und dem Bogentransportbereich. The turning device shown in Fig. 1 is part of a sheet-fed printing press with a
Printing cylinder 1 for straight printing and a
Auf dem Druckzylinder 1 bedruckte Bogen 5 werden nacheinander über einen
Zwischenzylinder 6 auf die Speichertrommel 3 befördert, auf der die bedruckte
Bogenseite außen liegt. Während sich die Speichertrommel 3 dreht, hält sie die
Vorderkante des Bogens 5 mittels Greifer 7 fest. Nachdem die Hinterkante des Bogens 5
an der Wendetrommel 4 angekommen ist, wird sie von Greifern 8 an der
Wendetrommel 4 ergriffen und durch die Wendetrommel 4, die sich gegenläufig zur
Speichertrommel 3 dreht, von der Speichertrommel 3 abgezogen, wobei die bisherige
Hinterkante des Bogens 5 zu seiner Vorderkante wird. Von der Wendetrommel 4, auf der
die bedruckte Seite des Bogens 5 gleichfalls außen liegt, wird der Bogen 5 an das
Druckwerk mit dem Druckzylinder 2 übergeben, an dem der Widerdruck durchgeführt
wird.On the printing cylinder 1 printed
Die Drehrichtungen der einzelnen Trommeln und Zylinder sind in Fig. 1 mit Pfeilen
eingezeichnet, und die jeweils bedruckten Bogenseiten sind mit Dreiecken
gekennzeichnet. Bogen 5 in verschiedenen Zwischenphasen der Wendung sind mit
strichpunktierten Linien eingezeichnet. Die Greifer 8 an der Wendetrommel 4 sind
gestrichelt in verschiedenen Phasen der Drehung der Wendetrommel 4 eingezeichnet.The directions of rotation of the individual drums and cylinders are indicated by arrows in FIG. 1
is drawn in, and the respective printed sheet sides are with triangles
characterized.
Unter Bezugnahme auf Fig. 2, die eine schematische Perspektivansicht der in Fig. 1
gezeigten Wendeeinrichtung ist, wird nun ein Bogensensor für die Wendeeinrichtung
beschrieben. Bei dem Bogensensor 12, 13 handelt es sich um einen aus einem
Empfänger 13 und einem Sender 12 bestehenden Sensor, der vom Sender 12 einen
Lichtstrahl 15 zum Empfänger 13 aussendet. Sender 12 und Empfänger 13 sind zwischen
der Wendetrommel 4 und der Speichertrommel 3 angebracht. Sowohl der Sender 12 als
auch der Empfänger 13 befinden sich außerhalb des Transportbereiches, in dem der
Bogen 5 sich bewegt, so daß keine Kollision zwischen dem Bogen 5 und entweder dem
Empfänger 13 oder dem Sender 12 entstehen kann. Damit kann der Bogen abschmierfrei
weitertransportiert werden. Referring to FIG. 2, which is a schematic perspective view of that in FIG. 1
Turning device shown is now a sheet sensor for the turning device
described. The
Der Lichtstrahl 15, welcher sich zwischen dem Sender 12 und dem Empfänger 13
befindet, ist durch entsprechende Anordnung des Empfängers 13 und des Senders 12 so
ausgerichtet, daß der bei einem vorhandenen Bogen 5, der von Greifern 8 der
Wendetrommel 4 gehalten wird, den Bogen 5 in seiner Ebene theoretisch durchdringt.
Vorzugsweise in einem spitzen Winkel α 14. Erreicht wird dies, indem der Sender 12 auf
die Bogenunterseite im Hinblick auf den Bogentransportweg von der Speichertrommel 3
zur Wendetrommel 4 gerichtet wird und der Empfänger 13 oberhalb dieser Ebene
angeordnet ist. Eine umgekehrte Anordnung von Sender 12 und Empfänger 13 ist ebenso
möglich.The
Der sich durch diese Anordnung im Hinblick auf die Bogenfläche ergebende Winkel des
Lichtstrahles 15 läßt sich durch Verschieben des Senders 12 oder Empfängers 13 sowohl
in horizontaler, als auch in vertikaler Richtung einstellen.
Trifft der Lichtstrahl auf einen Bogen, so wird dieser als Gut-Bogen erkannt (kein
Empfang). Wird kein Bogen zum vorbestimmten Zeitpunkt erkannt, so gilt dies als
Fehlbogen und die Druckmaschine führt die Druckabschaltung durch.The resulting angle with this arrangement with respect to the arc
Der Bogensensor 12, 13 ist im Bogenwendebereich verschiebbar angeordnet. Durch
Verschieben des Bogensensors 12, 13 näher hin zur Wendetrommel 4 oder näher hin zur
Speichertrommel 3 kann der Zeitpunkt, wann die Bogenerkennung stattfinden soll,
eingestellt werden. Eine Bogenerkennung zu einem früheren Zeitpunkt erhöht die
verbleibende Reaktionszeit zur Druckabschaltung.The
Vorzugsweise wird der Sensor möglichst nahe in Richtung Speichertrommel angebracht, jedoch so, daß ein wegschlagender Fehlbogen kein "Gutsignal" ergibt.The sensor is preferably attached as close as possible in the direction of the storage drum, however, in such a way that a missing sheet does not give a "good signal".
In der Beschreibung bzw. Figurenbeschreibung wird eine Wendeeinrichtung mit doppelt
großer Speichertrommel 3 als Ausführungsbeispiel gezeigt. Die Erfindung ist jedoch nicht
auf diese Ausführungsform beschränkt. Vielmehr ist die Erfindung bei jeglichen Arten
von Bogenwendungen einsetzbar. In the description or description of the figures, a turning device with double
- 11
- Druckzylinder für SchöndruckPrinting cylinder for face printing
- 22nd
- Druckzylinder für WiderdruckPrinting cylinder for reverse printing
- 33rd
- SpeichertrommelStorage drum
- 44th
- WendetrommelTurning drum
- 55
- Bogenarc
- 66
- ZwischenzylinderIntermediate cylinder
- 7, 87, 8
- GreiferGripper
- 1212th
- SenderChannel
- 1313
- Empfängerreceiver
- 1414
- α Winkelα angle
- 1515
- LichtstrahlBeam of light
Claims (4)
- Sheet sensor for a printing press having a sheet reversing device, a sheet sensor arranged in the sheet reversing area (12, 13) and consisting of a transmitter (12) and a receiver (13), with a light beam between the transmitter and the receiver running at an angle with respect to a sheet travel plane, and with the transmitter and receiver being arranged outside the sheet travel area on one side (AS, BS) of the printing press,
characterized in that the sheet sensor (12, 13) is formed as a reflection light barrier with the transmitter (12) and the receiver (13) being arranged on one side of the printing press and a reflector being arranged on the other side of the printing press, and that the reflection light barrier has a polarising filter. - Sheet sensor arrangement according to claim 1,
characterized in that the sheet sensor (12, 13) is formed as a self-calibrating sensor. - Sheet sensor arrangement according to claim 1,
characterized in that the sheet sensor (12, 13) is displaceably arranged in the sheet reversing area. - Sheet sensor arrangement according to claim 1,
characterized in that the transmitter (12) and/or the receiver (13) are horizontally and/or vertically adjustable independently of each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19707658 | 1997-02-26 | ||
| DE19707658A DE19707658A1 (en) | 1997-02-26 | 1997-02-26 | Inclined sensor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0861722A2 EP0861722A2 (en) | 1998-09-02 |
| EP0861722A3 EP0861722A3 (en) | 1999-05-06 |
| EP0861722B1 true EP0861722B1 (en) | 2001-12-19 |
Family
ID=7821520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98101425A Expired - Lifetime EP0861722B1 (en) | 1997-02-26 | 1998-01-28 | Sensor for detecting cocked sheets |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0861722B1 (en) |
| JP (1) | JP4160647B2 (en) |
| DE (2) | DE19707658A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6912952B1 (en) | 1998-05-24 | 2005-07-05 | Hewlett-Packard Indigo B.V. | Duplex printing system |
| AU1072900A (en) * | 1999-11-07 | 2001-06-06 | Indigo N.V. | Tandem printing system with fine paper-position correction |
| DE60029016T2 (en) | 2000-04-18 | 2007-01-25 | Hewlett-Packard Indigo B.V. | DEVICE FOR DISPLAYING A PAPER JAM AND TRANSPORT POSITION |
| DE10254880B4 (en) * | 2001-12-14 | 2009-06-10 | Heidelberger Druckmaschinen Ag | Method of detecting edges of sheet materials |
| DE10225732B4 (en) * | 2002-06-11 | 2014-08-28 | manroland sheetfed GmbH | Sheet travel control |
| DE102005049927A1 (en) * | 2005-10-18 | 2007-04-19 | Koenig & Bauer Ag | Sensor arrangement, for monitoring the transport of printed material in a printing machine, comprises a sensor arranged on the printing path, a cleaning device for the sensor and a storage device |
| DE102006003909B4 (en) * | 2006-01-27 | 2017-06-08 | manroland sheetfed GmbH | Fehlbogensensor a sheet-processing machine, in particular a sheet-fed press |
| DE102006019761A1 (en) * | 2006-04-28 | 2007-10-31 | Koenig & Bauer Aktiengesellschaft | Sheet controlling device for use in sheet rotation printing machine, has reference surface arranged at radial distance of sheet web at sheet web transporting rotation body, where surface is curved corresponding to sheet web |
| JP5643610B2 (en) * | 2010-03-09 | 2014-12-17 | 株式会社セイコーアイ・インフォテック | Recording device |
| DE102010028595B4 (en) * | 2010-05-05 | 2021-06-10 | manroland sheetfed GmbH | Sheet processing machine with comb-shaped sheet guiding device |
| CN103057278A (en) * | 2013-01-18 | 2013-04-24 | 无锡佳泰科技有限公司 | Label printer capable of carrying out skip printing detection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5851827B2 (en) * | 1980-12-05 | 1983-11-18 | 小森印刷機械株式会社 | Printing paper side edge detection device |
| DE3106144A1 (en) * | 1981-02-13 | 1982-08-26 | Mannesmann AG, 4000 Düsseldorf | CONTROL DEVICE FOR THE RECORDER IN PRINTERS |
| ES8402225A1 (en) * | 1982-05-29 | 1984-01-16 | Heidelberger Druckmasch Ag | Device for controlling sheets fed to the feed table of a printing press. |
| DD212024A1 (en) * | 1982-12-14 | 1984-08-01 | Winfried Buesse | DEVICE FOR CONTROLLING ARC IN ROTATION PRINTING MACHINES |
-
1997
- 1997-02-26 DE DE19707658A patent/DE19707658A1/en not_active Ceased
-
1998
- 1998-01-28 DE DE59802485T patent/DE59802485D1/en not_active Expired - Lifetime
- 1998-01-28 EP EP98101425A patent/EP0861722B1/en not_active Expired - Lifetime
- 1998-02-24 JP JP04198898A patent/JP4160647B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0861722A2 (en) | 1998-09-02 |
| JPH10235842A (en) | 1998-09-08 |
| DE19707658A1 (en) | 1998-09-03 |
| JP4160647B2 (en) | 2008-10-01 |
| EP0861722A3 (en) | 1999-05-06 |
| DE59802485D1 (en) | 2002-01-31 |
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