EP0939738A1 - Sheet feeding device - Google Patents

Sheet feeding device

Info

Publication number
EP0939738A1
EP0939738A1 EP97948692A EP97948692A EP0939738A1 EP 0939738 A1 EP0939738 A1 EP 0939738A1 EP 97948692 A EP97948692 A EP 97948692A EP 97948692 A EP97948692 A EP 97948692A EP 0939738 A1 EP0939738 A1 EP 0939738A1
Authority
EP
European Patent Office
Prior art keywords
sheet
gripper
cylinder
suction
designed
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
EP97948692A
Other languages
German (de)
French (fr)
Other versions
EP0939738B1 (en
Inventor
Reinhard Nerger
Arndt Jentzsch
Victor Hefftler
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0939738A1 publication Critical patent/EP0939738A1/en
Application granted granted Critical
Publication of EP0939738B1 publication Critical patent/EP0939738B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0816—Suction grippers separating from the top of pile
    • B65H3/0833—Suction grippers separating from the top of pile and acting on the front part of the articles relatively to the final separating direction
    • 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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers

Definitions

  • the invention relates to a device for feeding sheets from a sheet stack to a transport drum of a printing press.
  • Printing presses are known (DR 435 592) which have a triple-size impression cylinder with three pressure calipers and three rows of grippers, the impression cylinder interacting with a double-size offset cylinder and this with a double-size plate cylinder.
  • the plate cylinder are each assigned two inking units and dampening units that can be brought into active connection with the two printing plates of the plate cylinder.
  • the sheets to be printed are fed to the three gripper rows of the printing cylinder. After the multi-color printing of the three sheets with two cylinder revolutions, the next three sheets are fed.
  • a disadvantage is the process sequence described, which does not allow an increase in performance.
  • the object of the invention is to provide a device for feeding sheets with high feed performance and low dynamic loads.
  • Fig. 1 feed device Fig. 2 s / v / b diagram.
  • REPLACEMENT B ⁇ (RULE 26) 1 schematically shows a feed device, the feed device separating the uppermost sheet 1 from a sheet stack 2 and conveying it to a sheet transport drum 3.
  • the sheet transport drum 3 is designed as a pressure cylinder with three gripper rows 9, three cylinder channels 12 and with three pressure saddles 10.
  • the sheet transport drum 3 is triple in size in relation to a normal cylinder, not shown, having only one pressure saddle 10.
  • the sheet transport drum 3 is operatively connected to at least one offset cylinder 11 covered with a printing blanket, the offset cylinder 11 having two blanket saddles 13 and being double the size of the normal cylinder mentioned.
  • the offset cylinder 11 is operatively connected to a printing forme cylinder 14, which is also double in size, with two printing forme saddles 15, on each of which a printing forme is clamped.
  • the feed device consists of a transport element 4 and a pre-gripper 5.
  • the transport element 4 is arranged above the sheet stack 2, preferably in the front area of the uppermost sheet 1, connected to an oscillation drive (not shown) and designed as a suction oscillator.
  • the suction cups 6 of the suction oscillator are designed as lifting suction devices, preferably as so-called three-stage suction devices.
  • the oscillation angle of the transport element 4 is a maximum of 25 ° and is preferably 10 °.
  • the uppermost sheet 1 is gripped by the suction devices 6 of the transport element 4, which are designed as three-stage suction devices, in the region of the front edge (gripper edge) and separated from the sheet stack 2 by a vertical movement of the suction device. Then the sheet 1 is over the feed table 7 located in front of the sheet stack 2 to the one located at the front end of the feed table
  • REPLACEMENT BLA ⁇ (RULE 26) Feed marks 8 promoted and released by the suction cups 6.
  • the suction cups 6 are again moved vertically before the swinging-back process and lowered over the sheet stack 2 after the return swinging movement to the sheet stack 2; the process described then begins again.
  • a pre-gripper 5 is arranged below the feed table 7.
  • This pre-gripper is designed as a suction oscillator.
  • the suction oscillator takes over the sheet 1 from the feed table 7, accelerates it and transfers it to one of the gripper rows 9 of the sheet transport drum 3.
  • the sheet is fed to the sheet transport drum 5 only at every second gripper row 9.
  • the design of the feed device as two suction oscillators leads to a very low-mass design and thus to no dynamic loads due to the use of the medium air as a holding element and the valve control elements used, so that high speeds are possible.
  • the system register is optimally influenced by an asymmetrical shift of the turning point (WP) of the oscillating movement of the gripper in favor of a minimal acceleration of the arc (FIG. 2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

The invention relates to a device for feeding sheets from a sheet pile to a sheet conveyor drum of a printing machine. The invention seeks to create a device to feed sheets with high feeding performance and low dynamic load. According to the invention, this is performed in that a conveyor element is placed above the sheet pile, configured as a suction box and connected to a lever mechanism, grabs the respective top sheet on the sheet pile, separates the sheet from the sheet pile and conveys the sheet across a feed table to lay marks; and in that, underneath the plane of the feed table, a pre-gripper, configured as an oscillating suction element, grabs the sheet to be conveyed, accelerates its conveyance and delivers the sheet to the sheet conveyer drum.

Description

Einrichtung zum Zuführen von BogenDevice for feeding sheets
Die Erfindung betrifft eine Einrichtung zum Zuführen von Bogen von einem Bogenstapel zu einer Transporttrommel einer Druckmaschine .The invention relates to a device for feeding sheets from a sheet stack to a transport drum of a printing press.
Es sind Druckmaschinen bekannt (DR 435 592), die einen dreifachgroßen Druckzylinder mit drei Drucksätteln und drei Greiferreihen aufweisen, wobei der Druckzylinder mit einem doppeltgroßen Of fsetzylinder und dieser mit einem doppeltgroßen Plattenzylinder zusammenwirkt. Dem Plattenzylinder sind je zwei wechselweise mit den zwei Druckplatten des Plattenzylinders in Wirkverbindung bringbare Farbwerke und Feuchtwerke zugeordnet.Printing presses are known (DR 435 592) which have a triple-size impression cylinder with three pressure calipers and three rows of grippers, the impression cylinder interacting with a double-size offset cylinder and this with a double-size plate cylinder. The plate cylinder are each assigned two inking units and dampening units that can be brought into active connection with the two printing plates of the plate cylinder.
Die Zuführung der zu bedruckenden Bogen erfolgt dabei jeweils an die drei Greiferreihen des Druckzylinders. Nach dem mehrfarbigen Bedrucken der drei Bogen bei zwei Zylinderumdrehungen erfolgt die Zuführung der nächsten drei Bogen.The sheets to be printed are fed to the three gripper rows of the printing cylinder. After the multi-color printing of the three sheets with two cylinder revolutions, the next three sheets are fed.
Nachteilig ist der beschriebene Verfahrensablauf, der eine Leistungssteigerung nicht zuläßt.A disadvantage is the process sequence described, which does not allow an increase in performance.
Aufgabe der Erfindung ist die Schaffung einer Einrichtung zum Zuführen von Bogen mit hoher Zuführleistung und geringen dynamischen Belastungen.The object of the invention is to provide a device for feeding sheets with high feed performance and low dynamic loads.
Erfindungsgemäß wird die Aufgabe durch das Kennzeichen des Patentanspruchs gelöst.According to the invention the object is achieved by the characterizing part of the patent claim.
Nachfolgend wird die Erfindung an einem Ausführungsbeispiel näher erläutert. In der Zeichnung zeigtThe invention is explained in more detail below using an exemplary embodiment. In the drawing shows
Fig. 1 Zuführeinrichtung Fig. 2 s/v/b-Diagramm.Fig. 1 feed device Fig. 2 s / v / b diagram.
ERSATZB π (REGEL 26) In Fig. 1 ist eine Zuführeinrichtung schematisch dargestellt, wobei die Zuführeinrichtung den jeweils obersten Bogen 1 von einem Bogenstapel 2 vereinzelt und denselben bis zu einer Bogentransporttrommel 3 fördert.REPLACEMENT B π (RULE 26) 1 schematically shows a feed device, the feed device separating the uppermost sheet 1 from a sheet stack 2 and conveying it to a sheet transport drum 3.
Die Bogentransporttrommel 3 ist als Druckzylinder mit drei Greiferreihen 9, drei Zylinderkanälen 12 und mit drei Drucksätteln 10 ausgebildet. Die Bogentransporttrommel 3 ist in Relation zu einem nur einen Drucksattel 10 aufweisenden nicht dargestellten Normal zylinder dreifachgroß.The sheet transport drum 3 is designed as a pressure cylinder with three gripper rows 9, three cylinder channels 12 and with three pressure saddles 10. The sheet transport drum 3 is triple in size in relation to a normal cylinder, not shown, having only one pressure saddle 10.
Die Bogentransporttrommel 3 steht mit mindestens einem mit Drucktuch bespannten Off setzylinder 11 in Wirkverbindung, wobei der Offsetzylinder 11 zwei Drucktuchsättel 13 aufweist und gegenüber dem erwähnten Normalzylinder doppeltgroß ist.The sheet transport drum 3 is operatively connected to at least one offset cylinder 11 covered with a printing blanket, the offset cylinder 11 having two blanket saddles 13 and being double the size of the normal cylinder mentioned.
Der Offsetzylinder 11 steht mit einem ebenfalls doppeltgroßen Druckformzylinder 14 mit zwei Druckformsätteln 15, auf welchen je eine Druckform aufgespannt ist, in Wirkverbindung. Die Zuführeinrichtung besteht aus einem Transportelement 4 und einem Vorgreifer 5.The offset cylinder 11 is operatively connected to a printing forme cylinder 14, which is also double in size, with two printing forme saddles 15, on each of which a printing forme is clamped. The feed device consists of a transport element 4 and a pre-gripper 5.
Das Transportelement 4 ist oberhalb des Bogenstapels 2, vorzugsweise im vorderen Bereich des jeweils obersten Bogens 1, angeordnet, mit einem nicht dargestellten Schwingantrieb verbunden und als Saugerschwinger ausgebildet. Die Sauger 6 des Saugerschwingers sind als Hubsauger vorzugsweise als sog. Dreistufensauger ausgebildet.The transport element 4 is arranged above the sheet stack 2, preferably in the front area of the uppermost sheet 1, connected to an oscillation drive (not shown) and designed as a suction oscillator. The suction cups 6 of the suction oscillator are designed as lifting suction devices, preferably as so-called three-stage suction devices.
Der Schwingwinkel des Transportelementes 4 beträgt maximal 25° und liegt vorzugsweise bei 10°.The oscillation angle of the transport element 4 is a maximum of 25 ° and is preferably 10 °.
Der jeweils oberste Bogen 1 wird von den als Dreistufensauger ausgebildeten Saugern 6 des Transportelementes 4 im Bereich der Vorderkante (Greiferrand) erfaßt und durch eine Vertikalbewegung des Saugers vom Bogenstapel 2 vereinzelt. Danach wird der Bogen 1 über den sich vor dem Bogenstapel 2 befindlichen Anlegtisch 7 bis zu den sich am vorderen Ende des Anlegtisches befindlichenThe uppermost sheet 1 is gripped by the suction devices 6 of the transport element 4, which are designed as three-stage suction devices, in the region of the front edge (gripper edge) and separated from the sheet stack 2 by a vertical movement of the suction device. Then the sheet 1 is over the feed table 7 located in front of the sheet stack 2 to the one located at the front end of the feed table
ERSATZBLAπ(REGEL26) Anlegmarken 8 gefördert und dort von den Saugern 6 freigegeben. Die Sauger 6 werden vor dem Rückschwingvorgang nochmals vertikal bewegt und über dem Bogenstapel 2 nach Beendigung der Rückschwingbewegung auf den Bogenstapel 2 abgesenkt; danach beginnt der beschriebene Vorgang erneut.REPLACEMENT BLAπ (RULE 26) Feed marks 8 promoted and released by the suction cups 6. The suction cups 6 are again moved vertically before the swinging-back process and lowered over the sheet stack 2 after the return swinging movement to the sheet stack 2; the process described then begins again.
Unterhalb des Anlegtisches 7 ist ein Vorgreifer 5 angeordnet. Dieser Vorgreifer ist als Saugerschwinger ausgebildet. Der Saugerschwinger übernimmt den Bogen 1 vom Anlegtisch 7, beschleunigt ihn und übergibt denselben an eine der Greiferreihen 9 der Bogentransporttrommel 3.A pre-gripper 5 is arranged below the feed table 7. This pre-gripper is designed as a suction oscillator. The suction oscillator takes over the sheet 1 from the feed table 7, accelerates it and transfers it to one of the gripper rows 9 of the sheet transport drum 3.
Die Bogenzuf ührung zur Bogentransporttrommel 5 erfolgt dabei nur an jede zweite Greiferreihe 9.The sheet is fed to the sheet transport drum 5 only at every second gripper row 9.
Die Rückschwingbewegung des Vorgreifers 5 - Passieren der Verbindungslinie 16 zwischen den Mittelpunkten der Bogentransporttrommel 3 und des Vorgreifers 5 - erfolgt durch den Zylinderkanal 12 der Bogentransporttrommel 3, d.h. in dem Zeitraum, zu dem der Zylinderkanal 12 der Bogentransporttrommel 3 die genannte Verbindungslinie 16 passiert.The swinging back movement of the pre-gripper 5 - passing the connecting line 16 between the centers of the sheet transport drum 3 and the pre-gripper 5 - takes place through the cylinder channel 12 of the sheet transport drum 3, i.e. in the period in which the cylinder channel 12 of the sheet transport drum 3 passes the connecting line 16 mentioned.
Die Ausbildung der Zuführeinrichtung als zwei Saugerschwinger führt durch die Verwendung des Mediums Luft als Halteelement und der verwendeten Ventilsteuerelemente zu einer sehr massearmen Bauweise und damit zu keinen dynamischen Belastungen, wodurch hohe Drehzahlen möglich sind.The design of the feed device as two suction oscillators leads to a very low-mass design and thus to no dynamic loads due to the use of the medium air as a holding element and the valve control elements used, so that high speeds are possible.
Durch eine asymetrische Verschiebung des Wendepunktes (WP) der Schwingbewegung des Vorgreifers zugunsten einer minimalen Beschleunigung des Bogens wird der Anlagepasser optimal beeinflußt (Fig. 2).The system register is optimally influenced by an asymmetrical shift of the turning point (WP) of the oscillating movement of the gripper in favor of a minimal acceleration of the arc (FIG. 2).
ERSATZBLAπ(REGEL26) Bezugs ZeichenaufstellungREPLACEMENT BLAπ (RULE 26) Reference list of characters
1 oberster Bogen1 top sheet
2 Bogenstapel2 stacks of sheets
3 Bogentransporttrommel3 sheet transport drum
4 Transportelement4 transport element
5 Vorgreifer5 pre-grippers
6 Sauger6 suction cups
7 Anlegtisch7 feed table
8 Anlegmarken8 landing marks
9 Greiferreihe9 row of grippers
10 Drucksattel10 pressure saddle
11 Offsetzylinder11 offset cylinders
12 Zylinderkanal12 cylinder channel
13 Drucktuchsattel13 blanket saddle
14 Druckformzylinder14 printing form cylinders
15 Druckformsattel15 printing form saddle
16 Verbindungslinie16 connecting line
s Weg v Geschwindigkeit b Beschleunigungs path v speed b acceleration
WP WendepunktWP turning point
ERSATZBLAπ(REGEL26) REPLACEMENT BLAπ (RULE 26)

Claims

Patentansprüche claims
1. Einrichtung zum Zuführen von Bogen von einem Bogenstapel zu einer Bogentransporttrommel einer Druckmaschine, dadurch gekennzeichnet, daß oberhalb des Bogenstapels (2) ein den jeweils zuzuführenden obersten Bogen (1) des Bogenstapels (2) erfassendes, den Bogen vom Bogenstapel (2) trennendes und den Bogen über einen Anlegtisch (7) zu Anlegmarken (8) transportierendes mit einem Schwingantrieb verbundenes, als Sauger ausgebildetes Transportelement (4) und unterhalb der Ebene des Anlegtisches (7) ein den zuzuführenden Bogen (1) erfassender, den Bogen beschleunigender und den Bogen an die Bogentransporttrommel (3) übergebender als Saugerschwinger ausgebildeter Vorgreifer (5) angeordnet ist.1. A device for feeding sheets from a sheet stack to a sheet transport drum of a printing machine, characterized in that above the sheet stack (2) one of the top sheet (1) of the sheet stack (2) to be fed, the sheet from the sheet stack (2) separating and the sheet via a feed table (7) to feed marks (8), which is connected to a vibratory drive and is designed as a suction element, and below the level of the feed table (7) a sheet (1) to be fed, which accelerates the sheet and accelerates the sheet Pre-gripper (5), which is designed as a suction oscillator and which transfers the sheet to the sheet transport drum (3), is arranged.
2. Einrichtung zum Zuführen nach Anspruch 1, dadurch gekennzeichnet, daß die Bogentransporttrommel (3) als mit doppeltgroßen Offsetzylinder (11) mit zwei Drucktuchsätteln (13) zusammenwirkender dreifachgroßer Druckzylinder mit drei Drucksätteln (10) und drei Greiferreihen (9) ausgebildet ist und nur jeder zweiten Greiferreihe (9) einen Bogen (1) zugeführt wird.2. Device for feeding according to claim 1, characterized in that the sheet transport drum (3) as a double-sized offset cylinder (11) with two printing blanket saddles (13) cooperating triple-sized printing cylinder with three pressure saddles (10) and three gripper rows (9) is formed and only an arch (1) is fed to every second row of grippers (9).
3. Einrichtung zum Zuführen nach Anspruch 1, dadurch gekennzeichnet, daß die Rückschwingbewegung des als Saugerschwinger ausgebildeten Vorgreifers (5) durch einen Zylinderkanal (12) des Bogenführungszylinders (3) erfolgt.3. Device for feeding according to claim 1, characterized in that the swinging back movement of the pre-gripper designed as a suction oscillator (5) takes place through a cylinder channel (12) of the sheet guiding cylinder (3).
4. Einrichtung zum Zuführen nach Anspruch 1, dadurch gekennzeichnet, daß der Wendepunkt der Schwingbewegung des als Saugerschwinger ausgebildeten Vorgreifers (5) asymetrisch zugunsten einer minimalen Beschleunigung des Bogens (1) verschoben ist.4. Device for feeding according to claim 1, characterized in that the turning point of the oscillating movement of the pre-gripper designed as a suction oscillator (5) is asymmetrically shifted in favor of a minimal acceleration of the arc (1).
ERSATZBLÄTT(REGEL26) SPARE BLADE (RULE 26)
EP97948692A 1996-10-29 1997-10-28 Sheet feeding device Expired - Lifetime EP0939738B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19644944A DE19644944A1 (en) 1996-10-29 1996-10-29 Device for feeding sheets
DE19644944 1996-10-29
PCT/DE1997/002525 WO1998018704A1 (en) 1996-10-29 1997-10-28 Sheet feeding device

Publications (2)

Publication Number Publication Date
EP0939738A1 true EP0939738A1 (en) 1999-09-08
EP0939738B1 EP0939738B1 (en) 2001-04-11

Family

ID=7810318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97948692A Expired - Lifetime EP0939738B1 (en) 1996-10-29 1997-10-28 Sheet feeding device

Country Status (3)

Country Link
EP (1) EP0939738B1 (en)
DE (2) DE19644944A1 (en)
WO (1) WO1998018704A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013379A1 (en) * 2000-03-17 2001-09-20 Koenig & Bauer Ag Sheet-fed rotary printing machine
DE102008014812A1 (en) 2008-03-18 2009-09-24 Koenig & Bauer Aktiengesellschaft Device for feeding sheets

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2156577B2 (en) * 1971-11-15 1974-07-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Pre-gripper swing system
DD142694A1 (en) * 1979-04-02 1980-07-09 Guenter Weisbach ARC PRINTING MACHINE WITH A BOTTOM PRE-GRIPPER
DD142869A1 (en) * 1979-04-02 1980-07-16 Guenter Weisbach SWINGING, BOTTOM PRE-GRIPPERS WORKING
DE4332683A1 (en) * 1993-09-25 1995-03-30 Heidelberger Druckmasch Ag Device for the drive of a swinging pre-gripper for individual-sheet transportation in a printing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9818704A1 *

Also Published As

Publication number Publication date
DE19644944A1 (en) 1998-04-30
DE59703364D1 (en) 2001-05-17
EP0939738B1 (en) 2001-04-11
WO1998018704A1 (en) 1998-05-07

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