EP0692379B1 - Device for controlling an automised printing plate exchange - Google Patents
Device for controlling an automised printing plate exchange Download PDFInfo
- Publication number
- EP0692379B1 EP0692379B1 EP95108291A EP95108291A EP0692379B1 EP 0692379 B1 EP0692379 B1 EP 0692379B1 EP 95108291 A EP95108291 A EP 95108291A EP 95108291 A EP95108291 A EP 95108291A EP 0692379 B1 EP0692379 B1 EP 0692379B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing plate
- counter
- pressure roller
- sensor
- pressure
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/16—Programming systems for automatic control of sequence of operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
- B41F27/1206—Feeding to or removing from the forme cylinder
Definitions
- the invention relates to a device for controlling an automated Printing plate change according to the preamble of claim 1.
- DE 3 940 796 C2 describes a method and a device for automatic change of a printing plate known, in which Pressure plates between a driven transport roller and Back pressure rollers are promoted. To do this, the transport roller and the freely rotating counter pressure roller with a force against each other hired, so that the pressure plate to be transported via friction receives the power necessary to promote it.
- GB-A-2 158 011 discloses an ink feed mechanism for a printing press known in which a measuring roller is coupled to a rotary encoder. The rotation the measuring roller is compared to the rotation of a driven pressure roller recorded and from the comparison signals formed quantities for the ink supply educated.
- JP-A-61114946 a device for monitoring the paper feed is shown in a copier known in which by means of an optical light barrier sensor the movement of a detector roller driven by friction is detected.
- the device serves to shorten the time interval for conveying a sheet and increase the processing speed of the machine.
- the object of the present invention is therefore a device to develop in such a way according to the preamble of claim 1 that it can be effectively determined with simple means whether a Pressure plate is properly conveyed.
- the rotation of the freely rotating is sensed Counter pressure roller to determine whether a used printing plate is properly discharged from the plate cylinder.
- the sensor system according to the invention determine whether a new one to be fed to the plate cylinder Pressure plate is properly conveyed.
- Fig. 2 shows a known printing plate changer 1 with two freely rotating counter pressure rollers that do not have a drive 2, 3.
- a transport roller 4 is pivotally mounted.
- This swivel Storage of the transport roller 4 consists recognizably of swivel levers with one swivel each.
- the transport roller 4 has one Drive, not shown, by means of the arrow indicated rotation of the transport roller 4 can be generated.
- Fig. 2 is one of a plate cylinder, not shown to be discharged pressure plate 5 shown by the to the Counter pressure roller 2 employed transport roller 4 in the direction of upward arrow is promoted.
- the one described here only in principle Device of the printing plate change 1 over the format width of the Printing plates two or more counter pressure and transport rollers 2, 3, 4 and in particular on the top of a before Protection cylinders located protection is arranged.
- Below the shown device of the printing plate changer 1 are Guide devices, not shown, by means of which a newly to be supplied Pressure plate towards the plate cylinder and a used pressure plate - Here the pressure plate 5 - are removed from the plate cylinder can. Feeding a new printing plate to the plate cylinder is done by placing the transport roller 4 on the counter pressure roller 3rd
- Fig. 3 shows a section through the storage of the counter pressure roller 2.
- the counter-pressure roller 2 is in a recess in a carrier 6 arranged and over, for example, needle bearings on one by the Carrier 6 held axle 7 rotatably mounted.
- a measuring bushing 8 On the left side of the counter pressure roller 2 is a measuring bushing 8 attached, which according to the embodiment shown as a Extension of a cylindrical arranged in the counter pressure roller 2 Body is formed in which the bearings sit. With the measuring socket 8 cooperates with a sensor 9, from which a signal can be taken when the measuring bushing 8 is set in rotation by the counterpressure roller 2 becomes.
- the sensor 9 is fastened to the carrier 6 via a holder 10, so that its active surface is a defined distance from the outer circumference the measuring socket 8 forms.
- FIG 1 shows in perspective the inventive design of the Measuring bushing 8. It is shown that the measuring bushing 8, which is coaxial runs to thru-axle 7, each on a quarter of its circumference Has slits.
- the measuring bush 8 is thus in the manner of a crown ring educated.
- the sensor 9 as an inductive proximity switch training, from which a signal can always be extracted, if the distance of the sensor 9 to the metallic part of the Measuring socket 8 or the metallic thru axle 7 changes.
- the switching distance of the sensor designed as an inductive proximity switch For this purpose, 9 is on the outer diameter of the measuring bushing 8 and the Diameter of the thru axle 7 matched.
- the output signals of the Sensors 9 can be fed to a control, not shown, which the signals of the sensor 9 depending on the control the transport roller and compares the correct printing plate conveyance determined. With the control it is possible issue an error message and an interruption of the printing plate change process to be initiated if in the manner described and found an incorrect printing plate feed has been. There are also other measures to be initiated by the control conceivable.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Kontrolle eines automatisierten Druckplattenwechsels gemäß dem Oberbegriff von Anspruch 1.The invention relates to a device for controlling an automated Printing plate change according to the preamble of claim 1.
Aus der DE 3 940 796 C2 ist ein Verfahren und eine Einrichtung zum automatischen Wechseln einer Druckplatte bekannt, bei welcher Druckplatten zwischen einer angetriebenen Transportrolle und Gegendruckrollen gefördert werden. Dazu werden die Transportrolle und die freidrehende Gegendruckrolle mit einer Kraft gegeneinander angestellt, so daß die zu transportierende Druckplatte über Reibschluß die zum Fördern nötige Kraft erhält.DE 3 940 796 C2 describes a method and a device for automatic change of a printing plate known, in which Pressure plates between a driven transport roller and Back pressure rollers are promoted. To do this, the transport roller and the freely rotating counter pressure roller with a force against each other hired, so that the pressure plate to be transported via friction receives the power necessary to promote it.
Es hat sich herausgestellt, daß gerade beim Abfördern einer gebrauchten Druckplatte vom Plattenzylinder eine relativ hohe Kraft aufgebracht werden muß, wenn die Druckplattenvorderkante aus dem geöffneten Erfassungsbereich der Druckanfang-Spannschiene herausgezogen werden muß. Dies hat seine Ursache darin, daß aufgrund der Zylinderkontur im Druckanfang-Bereich sowie des längeren Druckvorganges zuvor die Druckplatte im Bereich der Vorderkante eine Abkantung aufweist. Diese Abkantung führt zu einem Verkantungseffekt der Druckplattenvorderkante im Erfassungsbereich der geöffneten Druckanfang-Spannschiene. Es ist somit möglich, daß diese Kraft so groß wird, daß trotz angetriebener Transportrolle die Druckplatte nicht aus der Druckanfang-Spannschiene herausgezogen wird (Schlupf). Durch die Steuerung ist dies aber nicht feststellbar, so daß es zu Störungen in dem automatisierten Ablauf kommt. It has been found that just when a used is being removed Pressure plate from the plate cylinder applied a relatively high force must be when the printing plate leading edge from the open Detection area of the pressure start clamping rail are pulled out got to. The reason for this is that due to the cylinder contour in the beginning of printing area as well as the longer printing process Pressure plate has a bend in the area of the front edge. This bend leads to a tilting effect of the leading edge of the printing plate in the detection area of the open pressure start clamping rail. It is therefore possible that this force becomes so great that despite the driven transport roller, the pressure plate does not move out of the Pressure start tensioning rail is pulled out (slip). Through the Control this is not ascertainable, so that it leads to malfunctions comes in the automated process.
Aus der GB-A-2 158 011 ist ein Farbzufuhrmechanismus für eine Druckmaschine bekannt, bei der eine Meßwalze mit einem Drehgeber gekoppelt ist. Die Drehung der Meßwalze wird im Vergleich mit der Drehung einer angetriebenen Druckwalze erfaßt und aus den gebildeten Vergleichssignalen Größen für die Farbzufuhr gebildet.GB-A-2 158 011 discloses an ink feed mechanism for a printing press known in which a measuring roller is coupled to a rotary encoder. The rotation the measuring roller is compared to the rotation of a driven pressure roller recorded and from the comparison signals formed quantities for the ink supply educated.
Aus der US-A-4 795 278 ist ein Drehgeber bekannt, bei dem mittels einem Sensor die Drehung einer Scheibe bzw. eines strukturierten Ringes abgetastet wird.From US-A-4 795 278 a rotary encoder is known, in which by means of a sensor the rotation of a disc or a structured ring is sensed.
Aus der JP-A-61114946 ist eine Einrichtung zur Überwachung der Papierzufuhr bei einem Kopiergerät bekannt, bei der mittels einem optischen Lichtschrankensensor die Bewegung einer durch Reibung angetriebenen Detektorrolle erfaßt wird. Die Einrichtung dient dazu das Zeitintervall für das Fördern eines Bogens zu verkürzen und die Verarbeitungsgeschwindigkeit der Maschine zu erhöhen.From JP-A-61114946 a device for monitoring the paper feed is shown in a copier known in which by means of an optical light barrier sensor the movement of a detector roller driven by friction is detected. The The device serves to shorten the time interval for conveying a sheet and increase the processing speed of the machine.
Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung gemäß dem Oberbegriff von Anspruch 1 derartig weiterzubilden, so daß mit einfachen Mitteln wirkungsvoll feststellbar ist, ob eine Druckplatte ordnungsgemäß gefördert wird.The object of the present invention is therefore a device to develop in such a way according to the preamble of claim 1 that it can be effectively determined with simple means whether a Pressure plate is properly conveyed.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This task is solved by the characteristic features of Claim 1. Further developments of the invention result from the Subclaims.
Gemäß der Erfindung ist vorgesehen, die Drehung der sonst freidrehenden, also keinen Antrieb aufweisenden Gegendruckrolle sensorisch festzustellen. Durch die erfindungsgemäß vorgesehene Sensorik ist es somit möglich, festzustellen, ob die Gegendruckrolle sich überhaupt dreht bzw. ob die Gegendruckrolle die vorgeschriebene Anzahl von Umdrehungen macht, wenn die Transportrolle angetrieben wird.According to the invention, the rotation of the otherwise freely rotating, thus, no counter-pressure roller having a drive ascertain. Due to the sensor system provided according to the invention it is thus possible to determine whether the counter pressure roller is at all turns or whether the counter pressure roller the prescribed Number of revolutions made when the feed roller is driven becomes.
Gemäß dem weiter unten stehenden Ausführungsbeispiel der Erfindung erfolgt die sensorische Erfassung der Drehung der freidrehenden Gegendruckrolle zur Feststellung, ob eine gebrauchte Druckplatte ordnungsgemäß vom Plattenzylinder abgeführt wird. Selbstverständlich ist es aber mit der erfindungsgemäßen Sensorik auch möglich, festzustellen, ob eine neue, dem Plattenzylinder zuzuführende Druckplatte ordnungsgemäß gefördert wird.According to the embodiment of the invention below the rotation of the freely rotating is sensed Counter pressure roller to determine whether a used printing plate is properly discharged from the plate cylinder. Of course it is also possible with the sensor system according to the invention, determine whether a new one to be fed to the plate cylinder Pressure plate is properly conveyed.
Des weiteren erfolgt die Erläuterung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Zeichnungen.Furthermore, a preferred embodiment is explained the invention with reference to the drawings.
Es zeigt:
- Fig. 1
- perspektivisch eine erfindungsgemäß ausgebildete Gegendruckrolle,
- Fig. 2
- eine Fördervorrichtung für einen automatisierten Druckplattenwechsel, und
- Fig. 3
- einen Schnitt durch die Gegendruckrolle mit erfindungsgemäßer Sensorik.
- Fig. 1
- in perspective a counter pressure roller designed according to the invention,
- Fig. 2
- a conveyor for an automated printing plate change, and
- Fig. 3
- a section through the counter pressure roller with sensors according to the invention.
Fig. 2 zeigt einen an sich bekannten Druckplattenwechsler 1 mit
zwei freidrehenden, also keinen Antrieb aufweisenden Gegendruckrollen
2, 3. Wahlweise an eine der Gegendruckrollen 2, 3 anstellbar
ist eine Transportrolle 4 verschwenkbar gelagert. Diese verschwenkbare
Lagerung der Transportrolle 4 besteht erkennbar aus Schwenkhebeln
an mit je einem Drehgelenk. Die Transportrolle 4 weist einen
nicht dargestellten Antrieb auf, vermittels der die gemäß Pfeil
angedeutete Drehung der Transportrolle 4 erzeugbar ist.Fig. 2 shows a known printing plate changer 1 with
two freely rotating counter pressure rollers that do not have a
In Fig. 2 ist eine von einem nicht dargestellten Plattenzylinder
abzuführende Druckplatte 5 dargestellt, welche durch die an die
Gegendruckrolle 2 angestellte Transportrolle 4 in die Richtung des
nach oben weisenden Pfeiles gefördert wird. Der Vollständigkeithalber
sei an dieser Stelle erwähnt, daß die hier nur prinzipiell beschriebene
Vorrichtung des Druckplattenwechsels 1 über die Formatbreite der
Druckplatten zwei oder mehrere Gegendruck- und Transportrollen 2,
3, 4 aufweist und insbesondere an der Oberseite eines vor dem
Druckwerkszylindern befindlichen Schutz angeordnet ist. Unterhalb
der gezeigten Vorrichtung des Druckplattenwechslers 1 befinden sich
nicht dargestellte Leiteinrichtungen, mittels der eine neu zuzuführende
Druckplatte zum Plattenzylinder hin und eine gebrauchte Druckplatte
- hier die Druckplatte 5 - vom Plattenzylinder abgefördert werden
kann. Das Zuführen einer neuen Druckplatte zum Plattenzylinder
geschieht dabei durch Anstellen der Transportrolle 4 an die Gegendruckrolle
3.In Fig. 2 is one of a plate cylinder, not shown
to be discharged
Fig. 3 zeigt einen Schnitt durch die Lagerung der Gegendruckrolle
2. Die Gegendruckrolle 2 ist in einer Ausnehmung eines Trägers 6
angeordnet und über beispielsweise Nadellager auf einer durch den
Träger 6 gehaltenen Steckachse 7 drehbar gelagert. Fig. 3 shows a section through the storage of the
An der linken Seite der Gegendruckrolle 2 ist eine Meßbuchse 8
angebracht, welche gemäß dem gezeigten Ausführungsbeispiel als eine
Verlängerung eines in der Gegendruckrolle 2 angeordneten zylindrischen
Körpers ausgebildet ist, in dem die Lager sitzen. Mit der Meßbuchse
8 wirkt ein Sensor 9 zusammen, dem ein Signal entnehmbar ist, wenn
die Meßbuchse 8 durch die Gegendruckrolle 2 in Drehung versetzt
wird. Der Sensor 9 ist über eine Halterung 10 am Träger 6 befestigt,
so daß dessen aktive Fläche einen definierten Abstand zum Außenumfang
der Meßbuchse 8 bildet.On the left side of the
Figur 1 zeigt perspektivisch die erfindungsgemäße Ausbildung der
Meßbuchse 8. Dargestellt ist, daß die Meßbuchse 8, welche koaxial
zur Steckachse 7 verläuft, auf je einem Viertel ihres Umfanges
Schlitze aufweist. Die Meßbuchse 8 ist somit nach Art eines Kronenringes
ausgebildet. Durch diese Gestaltung der Meßbuchse 8 ist es
in einfacher Weise möglich, den Sensor 9 als induktiven Näherungsschalter
auszubilden, dem immer dann ein Signal entnehmbar ist,
wenn sich der Abstand des Sensors 9 zu dem metallischen Teil der
Meßbuchse 8 bzw. der metallischen Steckachse 7 ändert. Der Schaltabstand
des als induktiven Näherungsschalter ausgebildeten Sensors
9 ist dazu auf den Außendurchmesser der Meßbuchse 8 sowie den
Durchmesser der Steckachse 7 abgestimmt. Die Ausgangssignale des
Sensors 9 sind einer nicht dargestellten Steuerung zuführbar,
welche die Signale des Sensors 9 in Abhängigkeit der Ansteuerung
der Transportrolle vergleicht und daraus die ordnungsgemäße Druckplattenförderung
ermittelt. Durch die Steuerung ist es möglich,
eine Fehlermeldung auszugeben und eine Unterbrechung des Druckplattenwechselvorganges
einzuleiten, wenn auf die geschilderte Art
und Weise eine nicht korrekte Druckplattenförderung festgestellt
wurde. Auch sind andere von der Steuerung einzuleitende Maßnahmen
denkbar. Figure 1 shows in perspective the inventive design of the
Measuring bushing 8. It is shown that the measuring bushing 8, which is coaxial
runs to thru-
- 11
- DruckplattenwechslerPrinting plate changer
- 22nd
- GegendruckrolleCounter pressure roller
- 33rd
- ""
- 44th
- TransportrolleTransport roller
- 55
- Druckplatteprinting plate
- 66
- Trägercarrier
- 77
- SteckachseThru axle
- 88th
- MeßbuchseTest socket
- 99
- Sensorsensor
- 1010th
- Halterungbracket
Claims (3)
- Device for checking an automated printing plate change, in which a printing plate (5) can be fed between driven transport rollers (4) and freely rotating counter-pressure rollers (2, 3), characterised in that the counter-pressure roller (2) serving for feeding away a used printing plate (5) is fitted with a sensor (9) detecting the rotation of the counter-pressure roller (2), the output signals of which can be fed to a control carrying out the sequence of the automated printing plate change.
- Device according to Claim 1, characterised in that the counter-pressure roller (2) has a measuring bush (8) with slots arranged at the periphery in the fashion of a crown ring and the sensor (9) is constructed as an inductive proximity switch.
- Device according to Claim 2, characterised in that the measuring bush (8) has two diametrically oppositely lying slots.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9411254U | 1994-07-12 | ||
| DE9411254U DE9411254U1 (en) | 1994-07-12 | 1994-07-12 | Device for checking an automated printing plate change |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0692379A2 EP0692379A2 (en) | 1996-01-17 |
| EP0692379A3 EP0692379A3 (en) | 1996-11-13 |
| EP0692379B1 true EP0692379B1 (en) | 1999-08-18 |
Family
ID=6911029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95108291A Expired - Lifetime EP0692379B1 (en) | 1994-07-12 | 1995-05-31 | Device for controlling an automised printing plate exchange |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0692379B1 (en) |
| AT (1) | ATE183446T1 (en) |
| DE (2) | DE9411254U1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19611530C1 (en) * | 1996-03-23 | 1997-10-16 | Roland Man Druckmasch | Method and device for controlling an automated printing plate change process in a printing press |
| DE19636703C2 (en) * | 1996-09-10 | 1998-12-03 | Roland Man Druckmasch | Device for the automatic control of a printing plate change process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158011B (en) * | 1984-05-03 | 1988-05-25 | Duplo Seiko Corp | Ink detecting device for rotary printer |
| JPS61114946A (en) * | 1984-11-09 | 1986-06-02 | Canon Inc | Sheet material detector |
| US4795278B1 (en) * | 1986-11-28 | 1992-11-03 | Nippon Seiko Kk | Bearing assembly |
| DE3940796A1 (en) | 1989-12-09 | 1991-06-13 | Koenig & Bauer Ag | METHOD AND DEVICE FOR AUTOMATICALLY CHANGING A PRINT PLATE |
| DE4404558C2 (en) * | 1994-02-12 | 1996-02-01 | Roland Man Druckmasch | Device for automatically changing printing plates |
-
1994
- 1994-07-12 DE DE9411254U patent/DE9411254U1/en not_active Expired - Lifetime
-
1995
- 1995-05-31 AT AT95108291T patent/ATE183446T1/en not_active IP Right Cessation
- 1995-05-31 EP EP95108291A patent/EP0692379B1/en not_active Expired - Lifetime
- 1995-05-31 DE DE59506634T patent/DE59506634D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0692379A3 (en) | 1996-11-13 |
| EP0692379A2 (en) | 1996-01-17 |
| DE59506634D1 (en) | 1999-09-23 |
| DE9411254U1 (en) | 1994-10-13 |
| ATE183446T1 (en) | 1999-09-15 |
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