EP0861722A2 - Sensor for detecting cocked sheets - Google Patents

Sensor for detecting cocked sheets Download PDF

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Publication number
EP0861722A2
EP0861722A2 EP98101425A EP98101425A EP0861722A2 EP 0861722 A2 EP0861722 A2 EP 0861722A2 EP 98101425 A EP98101425 A EP 98101425A EP 98101425 A EP98101425 A EP 98101425A EP 0861722 A2 EP0861722 A2 EP 0861722A2
Authority
EP
European Patent Office
Prior art keywords
sheet
transmitter
receiver
sensor
sensor arrangement
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.)
Granted
Application number
EP98101425A
Other languages
German (de)
French (fr)
Other versions
EP0861722B1 (en
EP0861722A3 (en
Inventor
Willi Becker
Karl-Heinz Helmstädter
Andreas Henn
Tobias Dr. Müller
Jürgen Dr. Rautert
Andreas Schulz
Josef Wehle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0861722A2 publication Critical patent/EP0861722A2/en
Publication of EP0861722A3 publication Critical patent/EP0861722A3/en
Application granted granted Critical
Publication of EP0861722B1 publication Critical patent/EP0861722B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/02Arrangements of indicating devices, e.g. counters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02Controlling 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
    • B65H7/14Controlling 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50Occurence
    • B65H2511/51Presence
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/60Optical characteristics, e.g. colour, light
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00Sensing or detecting means
    • B65H2553/40Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41Photoelectric detectors
    • B65H2553/412Photoelectric 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.
  • turning devices for sheetfed printing with perfecting 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 one frequent 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.
  • 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 task is accomplished by the sheet sensor arrangement for a sheet printing machine solved, which is designed such that an existing transmitter and receiver Sheet sensor is provided in the sheet turning area that the transmitter on one Side of the press and the receiver on the other side of the press is arranged outside the sheet travel area, and that the transmitter below and the Receiver is arranged above the sheet travel level or vice versa.
  • 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 sheet sensor is provided as Reflection light barrier or reflection light sensor, preferably with a triple reflector, to design.
  • 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 Design of a light reflection barrier with polarization filter allows in advantageously also reliably detect reflecting surfaces.
  • the sheet sensor arrangement according to claim 8 is advantageously suitable for Safe detection of a sheet in the entire sheet transport area on one or any number of places in the paper transport system.
  • 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 I 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 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.
  • the angle of the light beam 15 resulting from this arrangement with respect to the arc surface can be adjusted by moving the transmitter 12 or receiver 13 both in the horizontal and in the vertical direction. If the light beam hits an arc, it is recognized as a good arc (no reception). If no sheet is detected at the predetermined point in time, this is considered a missing sheet and the printing press switches off the print.
  • 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.

Abstract

The sheet-sensor (12,13) consists of a transmitter (12) and receiver (13) in the area of the sheet-turner. The transmitter is on one side (AS) of the printer, and the receiver on the other side (BS), outside the sheet-track. The transmitter is above the plane along which the sheets run, and the receiver below it. The light beam emitted by the transmitter to the receiver runs at a slant in relation to the sheets' plane. The sheet-sensor is in the form of a reflection light barrier.

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 Bogendruckmaschine 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.There are turning devices for sheetfed printing with perfecting 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 one frequent 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 eine sehr kurzen 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.

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 Bogensensoranordnung für eine Bogendruckmaschine gelöst, die derart ausgestaltet ist, daß ein aus Sender und Empfänger bestehender Bogensensor im, Bogenwendebebereich vorgesehen ist, daß der Sender auf der einen Seite der Druckmaschine und der Empfänger auf der anderen Seite der Druckmaschine außerhalb des Bogenlaufbereiches angeordnet ist, und daß der Sender unterhalb und der Empfänger oberhalb der Bogenlaufebene angeordnet ist oder umgekehrt.This task is accomplished by the sheet sensor arrangement for a sheet printing machine solved, which is designed such that an existing transmitter and receiver Sheet sensor is provided in the sheet turning area that the transmitter on one Side of the press and the receiver on the other side of the press is arranged outside the sheet travel area, and that the transmitter below and the Receiver is arranged above the sheet travel level or vice versa.

Diese Art der Anordnung von Sender und Emplänger 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.

In einer weiteren Ausgestaltungsform ist es vorgesehen, den Bogensensor als Reflexionslichtschranke bzw. Reflexionslichtsensor, vorzugsweise mit Tripel-Reflektor, zu gestalten.In a further embodiment, the sheet sensor is provided as Reflection light barrier or reflection light sensor, preferably with a triple reflector, to design.

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, in vorteilhafter Weise 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 Design of a light reflection barrier with polarization filter allows in advantageously also reliably detect reflecting 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.

Die Bogensensoranordnung nach Anspruch 8 eignet sich in vorteilhafter Weise zur sicheren Dektektion eines Bogens im gesamten Bogentransportbereich an einer oder mehreren beliebigen Stellen des Papiertransportsystems.The sheet sensor arrangement according to claim 8 is advantageously suitable for Safe detection of a sheet in the entire sheet transport area on one or any number of places in the paper transport system.

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.
The drawing shows:
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 I 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 printing cylinder 2 for reverse printing. The between the impression cylinder I 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 The sheet turning area is preferably between the turning drum 4 Storage drum 3 and the sheet transport area.

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 sheets 5 are successively over a Intermediate cylinder 6 transported to the storage drum 3, on which the printed Arch side is outside. While the storage drum 3 rotates, it holds the Front edge of the sheet 5 by means of gripper 7 firmly. After the trailing edge of the sheet 5 arrived at the turning drum 4, it is gripped by 8 on the Turning drum 4 gripped and by the turning drum 4, which is opposite to Storage drum 3 rotates, withdrawn from the storage drum 3, the previous one The rear edge of the sheet 5 becomes its front edge. From the turning drum 4, on the the printed side of the sheet 5 is also outside, the sheet 5 is attached to the Transfer printing unit with the printing cylinder 2, on which the reverse printing is carried out becomes.

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 featured. Sheet 5 in different intermediate phases of the turn are with dash-dotted lines. The grippers 8 on the turning drum 4 are drawn in dashed lines in different phases of the rotation of the turning drum 4.

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 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.

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 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 α 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.

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 angle of the light beam 15 resulting from this arrangement with respect to the arc surface can be adjusted by moving the transmitter 12 or receiver 13 both in the horizontal and in the vertical direction.
If the light beam hits an arc, it is recognized as a good arc (no reception). If no sheet is detected at the predetermined point in time, this is considered a missing sheet and the printing press switches off the print.

Der Bogensensor 12, 13 ist im Bogenwendebereich verschiebbar angeordnet. Durch Verschieben des Bogensensors 12, 13 näher hin zur Wendetrommel 4 oder naher 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 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.

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 large storage drum 3 shown as an embodiment. However, the invention is not limited to this embodiment. Rather, the invention is of any kind can be used by bow turns.

BezugszeichenlisteReference list

11
Druckzylinder für SchöndruckPrinting cylinder for face printing
22nd
Druckzylinder für WiderdruckPrinting cylinder for reverse printing
33rd
SpeichertrommelStorage drum
44th
WendetrommelTurning drum
55
Bogenbow
66
ZwischenzylinderIntermediate cylinder
7, 87, 8
GreiferGripper
1212th
SenderChannel
1313
Empfängerreceiver
1414
α Winkelα angle
1515
LichtstrahlBeam of light

Claims (8)

Bogensensoranordnung für eine Bogendruckmaschine mit Bogenwendeeinrichtung,
dadurch gekennzeichnet,
daß ein aus Sender (12) und Empfänger (13) bestehender Bogensensor (12, 13) im, Bogenwendebereich vorgesehen ist, daß der Sender (12) auf der einen Seite (AS) der Druckmaschine und der Empfänger (13) auf der anderen Seite (BS) der Druckmaschine außerhalb des Bogenlaufbereiches angeordnet ist, und daß der Sender (12) oberhalb und der Empfänger (13) unterhalb der Bogenlaufebene so angeordnet ist, das der vom Sender (12) zum Empfänger (13) ausgesandte Lichtstrahl bezogen auf die Bogenlaufebene schräg verläuft.
Sheet sensor arrangement for a sheet printing machine with sheet turning device,
characterized by
that a sheet sensor (12, 13) consisting of transmitter (12) and receiver (13) is provided in the sheet turning area, that the transmitter (12) on one side (AS) of the printing press and the receiver (13) on the other side (BS) of the printing press is arranged outside the sheet travel area, and that the transmitter (12) above and the receiver (13) below the sheet travel plane is arranged such that the light beam emitted by the transmitter (12) to the receiver (13) is related to the sheet travel plane runs obliquely.
Bogensensoranordnung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Sender (12) unterhalb und der Empfänger (13) oberhalb der Bogenlaufebene angeordnet ist.
Bow sensor arrangement according to claim 1,
characterized by
that the transmitter (12) is arranged below and the receiver (13) above the sheet travel plane.
Bogensesoranordnung nach Anspruch 1 oder Anspruch 2,
dadurch gekennzeichnet,
daß der Bogensensor (12, 13) als Reflexionslichtschranke ausgestaltet ist, wobei Sender (12) und Empfänger (13) auf der einen Seite der Druckmaschine angeordnet sind und eine Reflektor auf der anderen Seite der Druckmaschine.
Bow sensor arrangement according to claim 1 or claim 2,
characterized by
that the sheet sensor (12, 13) is designed as a reflection light barrier, the transmitter (12) and receiver (13) being arranged on one side of the printing press and a reflector on the other side of the printing press.
Bogensensoranordnung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Bogensensor (12, 13) im Bogenwendebereich verschiebbar angeordnet ist.
Bow sensor arrangement according to claim 1,
characterized by
that the sheet sensor (12, 13) is slidably disposed in the sheet turning area.
Bogensensoranordnung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Sender (12) und/oder der Empfänger (13) unabhängig voneinander horizontal und/oder vertikal verstellbar sind.
Bow sensor arrangement according to claim 1,
characterized by
that the transmitter (12) and / or the receiver (13) are independently adjustable horizontally and / or vertically.
Bogensensoranordnung nach Anspruch 1 und Anspruch 3,
dadurch gekennzeichnet,
daß die Reflexionslichtschranke einen Polarisationsfilter aufweist.
Bow sensor arrangement according to claim 1 and claim 3,
characterized by
that the reflection light barrier has a polarization filter.
Bogensensoranordnung nach einem der vorgehenden Anprüche,
dadurch gekennzeichnet,
daß der Bogensensor (12, 13)als selbstkalibrierender Sensor ausgestaltet ist.
Sheet sensor arrangement according to one of the preceding claims,
characterized by
that the sheet sensor (12, 13) is designed as a self-calibrating sensor.
Bogensensoranordnung für eine Bogendruckmaschine,
dadurch gekennzeichnet,
daß ein aus Sender (12) und Empfänger (13) bestehender Bogensensor (12, 13) auf den Papierlaufbereich gerichtet ist, daß der Sender (12) auf der einen Seite (AS) der Druckmaschine und der Empfänger (13) auf der anderen Seite (BS) der Druckmaschine außerhalb des Bogenlaufbereiches angeordnet ist, und daß der Sender (12) oberhalb und der Empfänger (13) unterhalb der Bogenlaufebene angeordnet ist.
Sheet sensor arrangement for a sheet printing machine,
characterized by
that a sheet sensor (12, 13) consisting of transmitter (12) and receiver (13) is directed towards the paper path area, that the transmitter (12) on one side (AS) of the printing press and the receiver (13) on the other side (BS) of the printing press is arranged outside the sheet travel area, and that the transmitter (12) is arranged above and the receiver (13) below the sheet travel plane.
EP98101425A 1997-02-26 1998-01-28 Sensor for detecting cocked sheets Expired - Lifetime EP0861722B1 (en)

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 true EP0861722A2 (en) 1998-09-02
EP0861722A3 EP0861722A3 (en) 1999-05-06
EP0861722B1 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)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001034397A1 (en) * 1999-11-07 2001-05-17 Indigo N.V. Tandem printing system with fine paper-position correction
US6851672B1 (en) 2000-04-18 2005-02-08 Hewlett-Packard Indigo B.V. Sheet transport position and jam monitor
US6912952B1 (en) 1998-05-24 2005-07-05 Hewlett-Packard Indigo B.V. Duplex printing system
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
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
DE10225732B4 (en) * 2002-06-11 2014-08-28 manroland sheetfed GmbH Sheet travel control

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254880B4 (en) * 2001-12-14 2009-06-10 Heidelberger Druckmaschinen Ag Method of detecting edges of sheet materials
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

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EP0053728A1 (en) * 1980-12-05 1982-06-16 Komori Corporation Apparatus for detecting defects of printing sheets
EP0058285A1 (en) * 1981-02-13 1982-08-25 MANNESMANN Aktiengesellschaft Document detection means for printers
EP0095647A2 (en) * 1982-05-29 1983-12-07 Heidelberger Druckmaschinen Aktiengesellschaft Device for controlling sheets fed to the feed table of a printing press
DE3328843A1 (en) * 1982-12-14 1984-06-14 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Device for monitoring the transfer of sheets in rotary printers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053728A1 (en) * 1980-12-05 1982-06-16 Komori Corporation Apparatus for detecting defects of printing sheets
EP0058285A1 (en) * 1981-02-13 1982-08-25 MANNESMANN Aktiengesellschaft Document detection means for printers
EP0095647A2 (en) * 1982-05-29 1983-12-07 Heidelberger Druckmaschinen Aktiengesellschaft Device for controlling sheets fed to the feed table of a printing press
DE3328843A1 (en) * 1982-12-14 1984-06-14 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Device for monitoring the transfer of sheets in rotary printers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6912952B1 (en) 1998-05-24 2005-07-05 Hewlett-Packard Indigo B.V. Duplex printing system
WO2001034397A1 (en) * 1999-11-07 2001-05-17 Indigo N.V. Tandem printing system with fine paper-position correction
US6823786B1 (en) 1999-11-07 2004-11-30 Hewlett-Packard Indigo B.V. Tandem printing system with fine paper-position correction
US6851672B1 (en) 2000-04-18 2005-02-08 Hewlett-Packard Indigo B.V. Sheet transport position and jam monitor
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
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

Also Published As

Publication number Publication date
EP0861722B1 (en) 2001-12-19
DE59802485D1 (en) 2002-01-31
JPH10235842A (en) 1998-09-08
EP0861722A3 (en) 1999-05-06
DE19707658A1 (en) 1998-09-03
JP4160647B2 (en) 2008-10-01

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