EP1541510B1 - Device for conveying sheets through a printing machine - Google Patents
Device for conveying sheets through a printing machine Download PDFInfo
- Publication number
- EP1541510B1 EP1541510B1 EP04105822.3A EP04105822A EP1541510B1 EP 1541510 B1 EP1541510 B1 EP 1541510B1 EP 04105822 A EP04105822 A EP 04105822A EP 1541510 B1 EP1541510 B1 EP 1541510B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- grippers
- trailing edge
- cylinder
- sprockets
- 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.)
- Active
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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
- B41F21/10—Combinations of transfer drums and grippers
- B41F21/102—Combinations of transfer drums and grippers with pneumatic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
- B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
- B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
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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
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
- B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
- B65H29/045—Details of grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/30—Chains
- B65H2404/34—Gripper bars bridging at least two chains running synchronously and parallely
- B65H2404/342—Details of guiding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/21—Industrial-size printers, e.g. rotary printing press
Definitions
- the invention relates to a device for conveying a sheet by a printing machine according to the preamble of claim 1.
- a device for transporting a sheet for a rotary printing press in which an arc is transferred from a cylinder to a chain gripper system.
- the sheet In the chain gripper system, the sheet is held by grippers at the leading edge and at the trailing edge.
- the trailing edge grippers take over the bow in the outfeed gusset between supporting surfaces revolving with sprockets and the cylinder jacket surface. Until it is taken over by the trailing edge grippers, the sheet is held by suction grippers, which also rotate with the sprockets.
- the gripper tips of the trailing edge grippers lie above a track which describes the arc held on the lateral surface of the cylinder. So that the trailing edge grippers pass without colliding on the lateral surface of the cylinder, corresponding recesses must be present in the lateral surface, which represents an additional manufacturing effort.
- the bows are taken over at the leading edge by a gripper system.
- the radii of the pitch circles of the sprockets are made larger than the radius of the circular path of gripper pads about the axis of the sprocket shaft.
- the cylinder opposite the sprockets is recessed on the opposite sides of the sprockets.
- a variant provides to arrange the sprockets outside the end faces of the printing cylinder, from which a sheet is taken.
- the object of the invention is to develop a device for conveying a sheet through a printing machine, which allows for improved sheet guiding with reduced effort.
- trailing edge grippers which are attached to a chain conveyor, guided in the open state past a cylinder from which a sheet is to be taken.
- the gripper pads and gripper tips for the trailing edge are outside a path that describes the arc held on the outer surface of the cylinder. This ensures that the trailing edge gripper can pass without collision, the closed lateral surface of the adjacent cylinder.
- the trailing edge grippers are closed only in a rotation angle range of sprockets, in which the orbit of the gripper pad intersects the tip circle radius of the suckers.
- suction pads are used, which rotate with the sprockets of the chain conveyor, and take over the bow near the transfer center at the trailing edge. So that the sheet is safely and reproducibly taken over by the suction pads, support elements are provided with support surfaces which press the sheet to the lateral surface of the cylinder. D. h., An arc is still held by the contact surface of the support surface on the lateral surface of the cylinder when the suction pads touch the sheet just.
- the suction pads are forcibly brought against the trailing edge of the sheet by the radial height of the suction pads is provided greater than the radius of the support surfaces.
- the suction pads are arranged radially movable, the suction pads extend after leaving the contact area with the adjacent lateral surface of the cylinder back to its original height.
- the device offers the possibility of using actuators to adjust the suction pads in the direction of rotation in order to adjust the sheet sag to a desired level.
- actuators to adjust the suction pads in the direction of rotation in order to adjust the sheet sag to a desired level.
- the suction pad bridge can be tilted. This can be made any position corrections of a sheet during conveying by a printing press to z. B. to compensate for an inclination to leading brands or the diagonal register.
- Rotary transformers are provided for supplying energy to the actuators.
- the position of the suction pad bridge can be controlled, for which purpose sensors can be arranged which supply signals for the actual position of the sheet in the transfer center on the cylinder and the suction pad bridge.
- Another way to obtain a desired sheet sag consists in the structural design of the pitch circle diameter of the sprockets and the chain pitch with respect to the diameter of the lateral surface of the adjacent cylinder. It is essential that the unwound from the sprockets length of the chains in the same rotation angle range is smaller than the arc length.
- the printing unit 1 comprises a sheet transport drum 3, a printing cylinder 4, a transfer cylinder 5 and a plate cylinder 6.
- the plate cylinder 6 are associated with rollers of an inking unit 7 and a dampening unit 8.
- the boom 2 comprises a chain gripper system with a plurality of leading edge grippers 9.1 to 9.7 and trailing edge grippers 10.1 to 10.7, which are mounted on gripper bridges.
- the gripper bars are connected to endless chains, which are placed over sprockets 11, 12 and guided in chain tracks 13.
- In the conveying direction 14 is at the end of the lower strands of the chain tracks 13, a stacking table 15, on which a stack 16 is located.
- the stacking table 16 is lowerable with a chain transmission 17 according to the production progress.
- the sheets 18 are conveyed by means of the sheet transport drum 3 from the preceding printing unit to the printing cylinder 4.
- the sheets 18 are held in grippers 19 and are guided by a pressure nip 20 between the transfer cylinder 5 and the impression cylinder 4.
- the transfer cylinder 5 has a rubber-elastic elevator 22, with which the ink is transferred to the sheet 18 in the printing nip 21.
- the sheets 18 are taken over by the leading edge grippers 9 at the leading edge, the trailing edge of the sheets 18 being held by the trailing edge grippers 10.
- the grippers 9, 10 are opened, so that a sheet 18 falls on the stack 16.
- a leading edge stop 23 limits the movement of the dropped sheet 18 in the conveying direction 14.
- Fig. 2 the elements for conveying a sheet 18 from the printing cylinder 4 to the leading edge gripper 9 and trailing edge gripper 10 are shown in more detail.
- the double-sized cylinder 4 has two channels 24, 25, in which the grippers 19 are arranged on gripper bridges. These gripper bars extend across the width of a sheet 18, which is held at its front edge in the grippers 19.
- the printing cylinder 4 has two lateral surface segments 26, 27, on each of which a sheet 18 rests during conveying. The length of the lateral surface segments 26, 27 in the circumferential direction corresponds to the maximum length of a sheet 18 to be conveyed.
- the pressure cylinder 4 and the sprockets 11 are synchronously driven in the directions of arrows 28, 29.
- the distance between leading edge gripper 9 and trailing edge grippers 10 is adjustable by phase shifting the chains to the arc length.
- support elements 37 are arranged for an arc on the axis 33, which rotate with the sprockets 11.
- the support members 37 carry the sheet 18 at the pressure-free side edges.
- the support members 37 are slidable on the axis 33.
- the number of support members 37 in the circumferential direction can be varied according to the arc length.
- suction pads which are arranged on a Sauggreifermaschine 38.
- the Sauggreifermaschine 38 is associated with respect to the rotational position about the axis 33 of the trailing edge gripper bridge 36.
- the suction pads take over the bow 18 at the trailing edge.
- the leading edge gripper bridge 35 dips when passing the transfer center 34 in the channel 25 of the printing cylinder 4 a. Because of the channel 24/25 there is no risk of collision between the Vorkantengreifem 9 and the printing cylinder 4. At the same time, precautions must be taken for the trailing edge gripper 10 that the trailing edge gripper 10 come without touching the lateral surfaces 26, 27 over. For this purpose, the trailing edge gripper 10 are opened in good time before reaching the transfer center 34 so far that the trailing edge gripper bridge 36 can pass without collision.
- Fig. 3 shows the sprockets 11 in a rotational position of about 15 degrees in front of the transfer center 34.
- a gripper shaft 39 By turning a gripper shaft 39 in the direction 40 are the Gripper fingers 41 pivoted back so far that they are safely below the web 42, which describes the support surface of the support members 37.
- the gripper pad 43 is also lower in the radial direction than the web 42.
- the support members 37 extend in the circumferential direction up to the Sauggreifermaschine 38 zoom, so that the sheet 18 are still held by the support surface when the sucker 44 of the suction pads 38 the bow 18 straight touch.
- Fig. 4 is a detail IV off Fig. 3 shown in more detail.
- the radial height of the teat 44 is a measure x over the web 42 of the support members 37.
- the sucker 44 are displaced in the radial direction 45.
- the suction openings 46 of the suction 44 are connected via a channel 47 with a suction air source in combination.
- Fig. 5 and in detail VI in Fig. 6 the sucker 44 are shown exactly in the transfer center 34.
- the gripper fingers 41 are still pivoted away from the gripper pads 43.
- the suckers 44 take over the sheet 18 at the trailing edge.
- Upon further rotation of the sprockets 11 of the sheet 18 leaves the lateral surface 27 of the printing cylinder 4 and is supported by the support members 37 at its lateral edges.
- the suction cups 44 are radially inserted through the contact with the sheet 18 and the lateral surface 27 in the transfer center 34.
- the suckers 44 return to their original radial height, which they had in the area before the transfer center 34 held. This results in the area after the transfer center 34 between the radial level of the sucker 44 and the gripper pad 43 for the trailing edge of a height difference.
- the trailing edge gripper 10 is closed in the transfer center 48, so that the trailing edge of the sheet 18 between the gripper fingers 41 and the gripper pads 43 is held.
- the suction air of the teat 44 is turned off so that the teat 44 release the sheet 18 or the suction air remains employed and the sheet 18 are torn off by the teat 44.
- the chain conveyor 13 the sheet 18 is held on the front edge and trailing edge supported on the stack 16.
- the Sauggreifermaschine 38 With simultaneous control of the actuators undergoes the Sauggreifer Hampshire 38 a pure circumferential adjustment. In the case of different activation, an oblique position of the suction gripper bridge 38 takes place. In this way, any positional corrections of the sheet 18 can be made, in particular a compensation of an inclination of front marks in the feeder of the printing machine and a correction of settings of the diagonal registers.
- the position of the Sauggreifermaschine 38 can be controlled if position sensors are provided, which are directed on both sides of the sheet path in the transfer center 34 on the sheet 18.
- the current position of the Sauggreifermaschine 38 can be determined in the circumferential direction of the sprockets 11 with distance sensors.
- the energy for the actuation of the actuators is provided via rotary joints on the axis 33.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Discharge By Other Means (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Fördern eines Bogens durch eine drucktechnische Maschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for conveying a sheet by a printing machine according to the preamble of claim 1.
In der
Bei dem Bogenausleger für eine Druckmaschine nach der
Aufgabe der Erfindung ist es, eine Vorrichtung zum Fördern eines Bogens durch eine drucktechnische Maschine zu entwickeln, die mit verringertem Aufwand eine verbesserte Bogenführung ermöglicht.The object of the invention is to develop a device for conveying a sheet through a printing machine, which allows for improved sheet guiding with reduced effort.
Die Aufgabe wird mit einer Vorrichtung gelöst, welche die Merkmale nach Anspruch 1 aufweist. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The object is achieved with a device having the features of claim 1. Advantageous embodiments emerge from the subclaims.
Gemäß der Erfindung werden Hinterkantengreifer, welche an einem Kettenförderer befestigt sind, in geöffnetem Zustand an einem Zylinder vorbei geführt, von dem ein Bogen übernommen werden soll. Dabei liegen die Greiferauflagen und Greiferspitzen für die Hinterkante außerhalb einer Bahn, die der auf der Mantelfläche des Zylinders gehaltene Bogen beschreibt. Dadurch ist gewährleistet, dass die Hinterkantengreifer ohne Kollision die geschlossene Mantelfläche des benachbarten Zylinders passieren können. Die Hinterkantengreifer werden erst in einem Drehwinkelbereich von Kettenrädern geschlossen, in dem die Umlaufbahn der Greiferauflage den Kopfkreisradius der Sauger schneidet.According to the invention, trailing edge grippers, which are attached to a chain conveyor, guided in the open state past a cylinder from which a sheet is to be taken. The gripper pads and gripper tips for the trailing edge are outside a path that describes the arc held on the outer surface of the cylinder. This ensures that the trailing edge gripper can pass without collision, the closed lateral surface of the adjacent cylinder. The trailing edge grippers are closed only in a rotation angle range of sprockets, in which the orbit of the gripper pad intersects the tip circle radius of the suckers.
Zur Abnahme eines Bogens vom Zylinder werden Sauggreifer benutzt, die mit den Kettenrädern des Kettenförderers umlaufen, und die den Bogen in der Nähe der Übergabezentrale an der Hinterkante übernehmen. Damit der Bogen sicher und reproduzierbar von den Sauggreifern übernommen wird, sind Stützelemente mit Stützflächen vorgesehen, die den Bogen an die Mantelfläche des Zylinders drücken. D. h., ein Bogen wird von der Kontaktfläche der Stützfläche noch an der Mantelfläche des Zylinders gehalten, wenn die Sauggreifer den Bogen gerade berühren. Um einen Bogen sicher von einem Zylinder übernehmen zu können, werden die Sauggreifer zwangsweise gegen die Hinterkante des Bogens gebracht, indem die radiale Höhe der Sauggreifer größer vorgesehen wird, als der Radius der Stützflächen. Die Sauggreifer sind radial beweglich angeordnet, wobei die Sauggreifer nach verlassen des Kontaktbereiches mit der benachbarten Mantelfläche des Zylinders wieder auf ihre ursprüngliche Höhe ausfahren.To remove a sheet from the cylinder suction pads are used, which rotate with the sprockets of the chain conveyor, and take over the bow near the transfer center at the trailing edge. So that the sheet is safely and reproducibly taken over by the suction pads, support elements are provided with support surfaces which press the sheet to the lateral surface of the cylinder. D. h., An arc is still held by the contact surface of the support surface on the lateral surface of the cylinder when the suction pads touch the sheet just. In order to safely take over a bow from a cylinder, the suction pads are forcibly brought against the trailing edge of the sheet by the radial height of the suction pads is provided greater than the radius of the support surfaces. The suction pads are arranged radially movable, the suction pads extend after leaving the contact area with the adjacent lateral surface of the cylinder back to its original height.
Beim Fördern eines Bogens an der Vorderkante und an der Hinterkante ist, z. B. wegen einer einseitigen Beaufschlagung mit einem Trockner, ein Mindestmaß für einen Bogendurchhang erforderlich. Die Vorrichtung bietet die Möglichkeit, mit Aktoren die Sauggreifer in Umlaufrichtung zu verstellen, um den Bogendurchhang auf ein gewünschtes Maß einzustellen. Wenn zwei an einer Sauggreiferbrücke angreifende Aktoren verschieden angesteuert werden, kann die Sauggreiferbrücke schräg gestellt werden. Damit können beliebige Lagekorrekturen eines Bogens beim Fördern durch eine Druckmaschine vorgenommen werden, um z. B. eine Kompensation einer Schrägstellung an Vordermarken oder des Diagonalregisters zu bewirken. Zur Energieversorgung der Aktoren sind Drehübertrager vorgesehen. Die Position der Sauggreiferbrücke kann geregelt werden, wozu Sensoren angeordnet sein können, die Signale zur Istlage des Bogens in der Übergabezentrale auf dem Zylinder und der Sauggreiferbrücke liefern.When conveying a sheet at the leading edge and at the trailing edge, z. B. because of a one-sided exposure to a dryer, a minimum required for a sagging sag. The device offers the possibility of using actuators to adjust the suction pads in the direction of rotation in order to adjust the sheet sag to a desired level. When two actuators acting on a suction pad bridge are different can be controlled, the suction pad bridge can be tilted. This can be made any position corrections of a sheet during conveying by a printing press to z. B. to compensate for an inclination to leading brands or the diagonal register. Rotary transformers are provided for supplying energy to the actuators. The position of the suction pad bridge can be controlled, for which purpose sensors can be arranged which supply signals for the actual position of the sheet in the transfer center on the cylinder and the suction pad bridge.
Eine weitere Möglichkeit, einen gewünschten Bogendurchhang zu erhalten, besteht in der konstruktiven Gestaltung des Teilkreisdurchmessers der Kettenräder und der Kettenteilung in Bezug auf den Durchmesser der Mantelfläche des benachbarten Zylinders. Dabei ist es wesentlich, dass die von den Kettenrädern abgewickelte Länge der Ketten in demselben Drehwinkelbereich kleiner als die Bogenlänge ist.Another way to obtain a desired sheet sag, consists in the structural design of the pitch circle diameter of the sprockets and the chain pitch with respect to the diameter of the lateral surface of the adjacent cylinder. It is essential that the unwound from the sprockets length of the chains in the same rotation angle range is smaller than the arc length.
Die Erfindung soll nachstehend anhand eines Ausführungsbeispiels näher erläutert werden, es zeigen:
- Fig. 1:
- ein Schema eines Auslegers einer Druckmaschine mit einem Kettengreifersystem,
- Fig. 2:
- ein Schema zum Bogentransfer zwischen einem Druckzylinder und dem Ketten-Greifersystem,
- Fig. 3:
- eine vergrößerte Ansicht aus
Fig. 2 in einerPhase 15 Grad vor Übernahme einer Bogenhinterkante, - Fig. 4:
- ein vergrößertes Detail aus
Fig. 3 zur radialen Lage von Sauggreifern, - Fig. 5:
- eine vergrößerte Ansicht aus
Fig. 2 in einer Phase bei der Übernahme einer Bogenhinterkante von Sauggreifern, - Fig. 6:
- ein vergrößertes Detail aus
Fig. 5 mit berührendem Kontakt der Sauggreifer an der Hinterkante eines Bogens, - Fig. 7:
- eine vergrößerte Ansicht aus
Fig. 2 in einer Phase 195 Grad nach der Übernahme einer Bogenhinterkante, und - Fig. 8:
- ein vergrößertes Detail aus
Fig. 7 mit Übernahme der Bogenhinterkante durch Hinterkantengreifer des Kettengreifersystems.
- Fig. 1:
- a diagram of a boom of a printing machine with a chain gripper system,
- Fig. 2:
- a diagram for sheet transfer between a printing cylinder and the chain gripper system,
- 3:
- an enlarged view
Fig. 2 in aphase 15 degrees before taking over a sheet trailing edge, - 4:
- an enlarged detail
Fig. 3 for the radial position of suction pads, - Fig. 5:
- an enlarged view
Fig. 2 in a phase when taking over a sheet trailing edge of suction pads, - Fig. 6:
- an enlarged detail
Fig. 5 with touching contact of the suction pads on the trailing edge of a sheet, - Fig. 7:
- an enlarged view
Fig. 2 in a phase 195 degrees after the acquisition of a sheet trailing edge, and - Fig. 8:
- an enlarged detail
Fig. 7 with takeover of the sheet trailing edge by rear edge gripper of the chain gripper system.
In
Die Vorderkantengreiferbrücke 35 taucht beim Passieren der Übergabezentrale 34 in den Kanal 25 des Druckzylinders 4 ein. Wegen dem Kanal 24/25 besteht an dieser Stelle keine Kollisionsgefahr zwischen den Vorkantengreifem 9 und dem Druckzylinder 4. Dagegen müssen für die Hinterkantengreifer 10 Vorkehrungen getroffen werden, dass die Hinterkantengreifer 10 ohne Berührung an den Mantelflächen 26, 27 vorbei kommen. Hierzu werden die Hinterkantengreifer 10 rechtzeitig vor Erreichen der Übergabezentrale 34 soweit geöffnet, dass die Hinterkantengreiferbrücke 36 ohne Kollision passieren kann.The leading
In
In
Entsprechend dem Umlaufdurchmesser d der Stützelemente 37, des Teilkreisdurchmessers do der Kettenräder 11 und der Länge 1 der Bogen 18 ergibt sich eine Bogenverkürzung a mit
Aus dieser Bogenverkürzung resultiert für einen Bogen mit geringer Steifigkeit und kleinem Durchhang ein maximaler Bogendurchhang hmax und kleinem Durchhang aus:
Um mit den gegebenen Greiferhaltekräften einen Bogen 18, z. B. bei einseitiger Luftbeaufschlagung mit einem Trockner, halten zu können, ist ein Bogendurchhang erforderlich. Durch die Wurzelfunktion ergibt sich ein sensitiver Zusammenhang zwischen der Verkürzung a und dem Bogendurchhang hmax.In order with the given gripper holding forces a
Durch Ungenauigkeiten der Bogenlage auf einem Mantelflächensegment 26, 27 kann die Verkürzung a und damit der Bogendurchhang hmax stark beeinflusst werden. Deshalb ist es bei einer Variante der Erfindung vorgesehen, den Bogendurchhang hmax aktiv zu beeinflussen. Eine Beeinflussung ist in dem Drehwinkelbereich der Kettenräder 11 möglich, wo ein Bogen 18 nur durch die Sauger 44 gehalten wird, d. h., nach Übernahme vom Druckzylinder 4 bis zum Zeitpunkt der Übergabe an die Hinterkantengreiferbrücke 36. Eine Möglichkeit zur Lageänderung der Hinterkante der Bogen 18 in Bezug auf die Vorderkante besteht mittels Aktoren, insbesondere Piezoaktoren, die beidseitig zwischen der Sauggreiferbrücke 38 und den Haltern der Sauggreiferbrücke 38 auf der Achse 33 angeordnet sind. Bei gleichzeitiger Ansteuerung der Aktoren erfährt die Sauggreiferbrücke 38 eine reine Umfangsverstellung. Bei unterschiedlicher Ansteuerung erfolgt eine Schrägstellung der Sauggreiferbrücke 38. Damit können beliebige Lagekorrekturen des Bogens 18 vorgenommen werden, insbesondere eine Kompensation einer Schrägstellung von Vordermarken im Anleger der Druckmaschine und eine Korrektur von Einstellungen der Diagonalregister. Die Lage der Sauggreiferbrücke 38 kann geregelt werden, wenn Lagesensoren vorgesehen werden, die beidseitig des Bogenpfades in der Übergabezentrale 34 auf den Bogen 18 gerichtet sind. Zusätzlich kann die aktuelle Lage der Sauggreiferbrücke 38 in Umfangsrichtung der Kettenräder 11 mit Distanzsensoren bestimmt werden. Die Energie für die Betätigung der Aktoren wird über Drehübertrager an der Achse 33 zur Verfügung gestellt.By inaccuracies of the sheet position on a
Die obigen Betrachtungen zum Bogendurchhang hmax gehen davon aus, dass die Teilung der Kettenräder 11, 12 so klein ist, dass die Ketten keinen störenden Polygoneffekt besitzen. Eine weitere Einflussgröße auf den Bogendurchhang ergibt sich bei Berücksichtigung des Polygoneffektes bei grobgliedrigen Ketten im Ausleger 2. Bei einer Kette, deren um ein Kettenrad 11 gelegte Glieder ein Polygon bilden, wird sich ein Durchhang auch dann einstellen, wenn die Teilkreisdurchmesser der Kettenräder 11 den gleichen Durchmesser wie die Mantelflächensegmente 26, 27 des Druckzylinders 4 besitzen. Der resultierende Bogendurchhang hängt dabei von der Kettenteilung ab. Wenn ein Kettenrad 11 einen Teilkreisdurchmesser d0, eine Zähnezahl z und eine Kettenteilung t aufweist, dann gilt:
Die Bogenverkürzung ap mit Berücksichtigung des Polygoneffektes berechnet sich:
- 11
- Druckwerkprinting unit
- 22
- Auslegerboom
- 33
- BogentransporttrommelSheet transport drum
- 44
- Druckzylinderpressure cylinder
- 55
- Übertragungszylindertransfer cylinder
- 66
- Plattenzylinderplate cylinder
- 77
- Farbwerkinking
- 88th
- Feuchtwerkdampening
- 9.1-9.79.1-9.7
- VorderkantengreiferLeading edge gripper
- 10.1-10.710.1-10.7
- HinterkantengreiferTrailing edge grippers
- 11, 1211, 12
- KettenradSprocket
- 1313
- Kettenbahnchain conveyor
- 1414
- Förderrichtungconveying direction
- 1515
- Stapeltischstacking table
- 1616
- Stapelstack
- 1717
- Kettengetriebechain transmission
- 1818
- Bogenbow
- 1919
- Greifergrab
- 2020
- Druckspaltnip
- 2121
- Druckformprinting form
- 2222
- Aufzugelevator
- 2323
- VorderkantenanschlagLeading-edge stop
- 24,2524.25
- Kanalchannel
- 26, 2726, 27
- MantelflächensegmentSurface segment
- 28, 2928, 29
- Pfeilrichtungarrow
- 3030
- TeilkreisdurchmesserPitch diameter
- 3131
- Durchmesserdiameter
- 32, 3332, 33
- Achseaxis
- 3434
- ÜbergabezentraleTransfer center
- 35,3635.36
- Greiferbrückegripper
- 3737
- Stützelementsupport element
- 3838
- SauggreiferbrückeSauggreiferbrücke
- 3939
- Greiferwellegripper shaft
- 4040
- Richtungdirection
- 4141
- Greiferfingergripper fingers
- 4242
- Bahntrain
- 4343
- GreiferauflageGripper pad
- 4444
- Saugersucker
- 4545
- Richtungdirection
- 4646
- Saugöffnungsuction opening
- 4747
- Kanalchannel
- 4848
- ÜbergabezentraleTransfer center
Claims (8)
- Device (1) for conveying a sheet through a graphic arts machine,
including
a cylinder (4) with grippers (19) arranged in a gap to hold the leading edge of a sheet, a chain conveyor (13) having grippers (9.1-9.7, 10.1-10.7) fixed to endless chains to hold and take over the leading edge of a sheet from the cylinder and to hold the trailing edge of a sheet,
wherein the chains (13) pass over rotating sprockets (11, 12),
wherein coaxially revolving support elements (37) for the sheet are arranged between the sprockets associated with the cylinder, the support elements (37) being in rolling contact with the circumferential surface of the cylinder,
and wherein coaxially revolving suction grippers (44) for holding the trailing edge of the sheet are arranged between the sprockets associated with the cylinder, including an actuating device for opening and closing the grippers,
and including a drive for the cylinder and the sprockets,
characterized in
that the grippers (10.1-10.7) for the trailing edge pass the cylinder (4) in an opened state,
wherein gripper pads (43) and gripper tips (41) of the grippers (10.1-10.7) for the trailing edge are located underneath a path (42) travelled by the sheet (18) held on the circumferential surface (26, 27),
and that the grippers (10.1-10.7) for the trailing edge are closable in a rotary angle region in which the chains run off the sprockets (11) associated with the cylinder (4). - Device according to Claim 1,
characterized in
that radially movable suction grippers (44) are provided that are located in the region of the gripper pads (43) for the trailing edge in the circumferential direction and that are radially higher than the gripper pads (43) for the trailing edge outside the contact region (34) with the cylinder (4). - Device according to Claim 2,
characterized in
that the chain length wound off the sprockets (11) is smaller than the sheet length held between the grippers (9.1-9.7) for the leading edge and the suction grippers (44). - Device according to Claim 2,
characterized in
that with chains having polygonal-type links, the pitch diameter of the sprockets (11) is equal to or smaller than the diameter of the revolving support elements (37). - Device according to Claim 2,
characterized in
that actuating elements for adjusting the circumference of the suction grippers (44) are provided. - Device according to Claim 5,
characterized in
that piezoelectric actuators are provided for circumferential adjustment. - Device according to Claim 5,
characterized in
that the suction grippers (44) are arranged on a suction gripper bar (38), independently controllable actuating elements acting on both sides of the suction gripper bar (38). - Device according to Claim 1,
characterized in
that the grippers (10.1-10.7) for the trailing edge are closed at an angle of rotation of the sprockets (11) at which the circular path of the surface of the suction elements (44) intersects the path of the gripper pads (43) for the trailing edge.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10358171 | 2003-12-12 | ||
DE10358171A DE10358171A1 (en) | 2003-12-12 | 2003-12-12 | Device for conveying a sheet by a printing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1541510A1 EP1541510A1 (en) | 2005-06-15 |
EP1541510B1 true EP1541510B1 (en) | 2014-03-05 |
Family
ID=34485339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04105822.3A Active EP1541510B1 (en) | 2003-12-12 | 2004-11-17 | Device for conveying sheets through a printing machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US7234395B2 (en) |
EP (1) | EP1541510B1 (en) |
JP (1) | JP4970721B2 (en) |
CN (1) | CN100572059C (en) |
DE (1) | DE10358171A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006069209A (en) * | 2004-08-30 | 2006-03-16 | Heidelberger Druckmas Ag | Device for transferring sheet through print-technical machine |
EP1880846B1 (en) * | 2006-07-18 | 2012-12-19 | Heidelberger Druckmaschinen AG | Sheet-fed offset printing press |
US7735829B2 (en) * | 2006-11-06 | 2010-06-15 | Heidelberger Druckmaschinen Ag | Method and apparatus for turning a sheet during its transport through a printing press |
DE102007051203B4 (en) | 2006-11-21 | 2020-01-23 | Heidelberger Druckmaschinen Ag | Device for conveying a sheet through a printing machine |
JP5175079B2 (en) | 2006-11-21 | 2013-04-03 | ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト | Device for transporting sheets through printing technology machines |
DE102008005797A1 (en) | 2008-01-24 | 2009-07-30 | Koenig & Bauer Aktiengesellschaft | Extension arm for sheet-processing machine, particularly sheet-fed printing machine, has rotary leading edge gripper system that carries sheets on leading edge from sheet guide cylinder, mounted upstream to leading edge gripper system |
DE102008014811B4 (en) | 2008-03-18 | 2017-03-09 | Koenig & Bauer Ag | Device for conveying a sheet through a sheet-processing machine |
DE102008018314A1 (en) | 2008-04-11 | 2009-10-15 | Koenig & Bauer Aktiengesellschaft | Sheet-fed printing machine comprises console, which has two sheet conveying system with rotating fixing members, with which sheets are fixed at rear edges for transport of sheet conveying system in direction of console stack |
US8839718B2 (en) * | 2009-03-25 | 2014-09-23 | Hewlett-Packard Development Company, L.P. | Error correction in printing systems |
DE102010003010B4 (en) * | 2010-03-18 | 2017-05-04 | manroland sheetfed GmbH | Apparatus for conveying a sheet in a sheet delivery of a sheet-fed printing press |
DE102013217097B4 (en) | 2012-08-30 | 2024-04-04 | Koenig & Bauer Ag | Delivery device for a sheet processing machine with a first conveyor system for leading edges of sheets and a second conveying system for trailing edges of sheets, method for transporting sheets and use of a press-on movement for suction air control |
CN103487959B (en) * | 2013-10-15 | 2015-12-02 | 深圳市华星光电技术有限公司 | The transcription roller that vacuum adsorption force is adjustable and the thin-film bonding method with this transcription roller |
DE102014001968A1 (en) * | 2014-02-13 | 2015-08-13 | Heidelberger Druckmaschinen Ag | Device for taking over a sheet trailing edge of a sheet transport drum |
DE102021102598A1 (en) | 2021-02-04 | 2022-08-04 | Koenig & Bauer Ag | Sheet processing machine with a sheet transport system |
Family Cites Families (21)
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USRE25283E (en) * | 1962-11-06 | Sheet delivery slowdown | ||
US2911907A (en) * | 1955-10-28 | 1959-11-10 | Davidson William Ward | Multi-purpose rotary printing press |
DE2621250C2 (en) * | 1976-05-13 | 1982-07-22 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Sheet query device in a rotary printing press |
DE3108808C2 (en) * | 1981-03-07 | 1985-02-21 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Sheet-fed rotary planographic printing machine |
SE8601784L (en) * | 1986-04-18 | 1987-10-19 | Flensburg Carl G A | KIT FOR IMPLEMENTING SIGNATURES AND KIT FOR EXTENDING THE KIT |
DD248321A1 (en) * | 1986-04-21 | 1987-08-05 | Polygraph Leipzig | SUCTION IN TURNING OF PRINTING MACHINES |
DE3717093A1 (en) * | 1987-05-21 | 1988-12-08 | Heidelberger Druckmasch Ag | BOW ROTATION PRINTING MACHINE FOR THE PRODUCTION OF SINGLE-SIDED MULTICOLOR PRINTING OR BEAUTIFUL AND REPRINTING |
DE3939250C1 (en) * | 1989-11-28 | 1990-12-13 | Miller-Johannisberg Druckmaschinen Gmbh, 6222 Geisenheim, De | |
DE4218421A1 (en) | 1992-06-04 | 1993-12-09 | Heidelberger Druckmasch Ag | Sheet guide in the delivery of a printing press |
DE4336047A1 (en) * | 1993-10-22 | 1995-04-27 | Heidelberger Druckmasch Ag | Rotary sheet-fed printing machine for perfecting with a double-diameter cylinder that acts as a storage drum |
JP2898529B2 (en) * | 1993-12-02 | 1999-06-02 | 株式会社桜井グラフィックシステムズ | Sheet reversing mechanism of sheet-fed printing press |
EP0740608B1 (en) * | 1994-01-17 | 1998-04-01 | KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT | Device for mounting, dismounting and transporting curved objects that are easy to bend and have hanging up edges |
DE19525635C2 (en) * | 1995-07-14 | 1998-01-29 | Heidelberger Druckmasch Ag | Device for sheet delivery in a sheet printing machine |
RU2157764C2 (en) * | 1995-10-20 | 2000-10-20 | Де ля Рю Жиори С.А. | Sheet-fed machine |
CN1097511C (en) * | 1996-02-19 | 2003-01-01 | 吉奥里大街公司 | Impression cylinder of a sheet-fed printing machine |
DE19854844A1 (en) * | 1997-12-24 | 1999-07-01 | Heidelberger Druckmasch Ag | Control for suction air on openings in printer cylinder |
DE19814320C1 (en) * | 1998-03-31 | 1999-04-01 | Roland Man Druckmasch | Sheet feed for printer |
DE10014417A1 (en) * | 2000-03-24 | 2001-09-27 | Heidelberger Druckmasch Ag | Device for transporting a sheet for a rotary printing machine |
US6739252B2 (en) * | 2001-07-30 | 2004-05-25 | Heidelberger Druckmaschinen Ag | Method and apparatus for reversing sheet material in sheet-processing machines |
DE10157117A1 (en) * | 2001-11-21 | 2003-05-28 | Koenig & Bauer Ag | Sheet delivery for a sheet processing machine |
DE10315193A1 (en) * | 2002-04-18 | 2003-10-30 | Heidelberger Druckmasch Ag | Reversing assembly for sheet processing machine, has recesses that permit gripper devices to grip sheet trailing edge such that recesses are formed at various positions in circumferential surface for adapting to different sheet formats |
-
2003
- 2003-12-12 DE DE10358171A patent/DE10358171A1/en not_active Withdrawn
-
2004
- 2004-11-17 EP EP04105822.3A patent/EP1541510B1/en active Active
- 2004-12-10 JP JP2004358473A patent/JP4970721B2/en not_active Expired - Fee Related
- 2004-12-10 US US11/010,053 patent/US7234395B2/en not_active Expired - Fee Related
- 2004-12-13 CN CNB2004101021266A patent/CN100572059C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN100572059C (en) | 2009-12-23 |
CN1626343A (en) | 2005-06-15 |
DE10358171A1 (en) | 2005-07-07 |
EP1541510A1 (en) | 2005-06-15 |
US7234395B2 (en) | 2007-06-26 |
US20050126411A1 (en) | 2005-06-16 |
JP4970721B2 (en) | 2012-07-11 |
JP2005170683A (en) | 2005-06-30 |
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