EP0939738B1 - Sheet feeding device - Google Patents

Sheet feeding device Download PDF

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Publication number
EP0939738B1
EP0939738B1 EP97948692A EP97948692A EP0939738B1 EP 0939738 B1 EP0939738 B1 EP 0939738B1 EP 97948692 A EP97948692 A EP 97948692A EP 97948692 A EP97948692 A EP 97948692A EP 0939738 B1 EP0939738 B1 EP 0939738B1
Authority
EP
European Patent Office
Prior art keywords
sheet
gripper
cylinder
designed
feeding
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
Application number
EP97948692A
Other languages
German (de)
French (fr)
Other versions
EP0939738A1 (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

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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 machines are known (US-A-4,343,462) who have a triple size Printing cylinder with three pressure calipers and three rows of grippers have, the printing cylinder with a double-sized Offset cylinder and this with a double-sized plate cylinder cooperates.
  • the plate cylinder are two alternate in operative connection with the two pressure plates of the plate cylinder bringable inking units and dampening units assigned.
  • the sheets to be printed are fed to the three gripper rows of the impression cylinder. After the multi-colored Printing on the three sheets takes place at two cylinder revolutions feeding the next three sheets.
  • the object of the invention is to provide a device for Feed sheets with high feed rate and low dynamic Charges.
  • the object is characterized by the characterizing part of the claim solved.
  • a feed device is shown schematically, the feed device the top sheet 1 of each a sheet stack 2 isolated and the same up to a sheet transport drum 3 promotes.
  • the sheet transport drum 3 is a printing cylinder with three rows of grippers 9, three cylinder channels 12 and with three pressure calipers 10 trained.
  • the sheet transport drum 3 is in relation to a not shown having only one pressure saddle 10 Standard cylinder three times the size.
  • the sheet transport drum 3 stands with at least one with a printing blanket Covered offset cylinder 11 in operative connection, the Offset cylinder 11 has two blanket saddles 13 and opposite the normal cylinder mentioned is double in size.
  • the offset cylinder 11 is also double-sized Printing form cylinder 14 with two printing form saddles 15, on which one printing form each is clamped, in operative connection.
  • the feed device consists of a transport element 4 and a pre-gripper 5.
  • the transport element 4 is above the sheet stack 2, preferably arranged in the front area of the uppermost sheet 1, connected to a vibratory drive, not shown and trained as a suction transducer.
  • the suction cup 6 of the suction oscillator are preferably as so-called three-stage suction cups educated.
  • the oscillation angle of the transport element 4 is a maximum of 25 ° and is preferably 10 °.
  • the top sheet 1 is used as a three-stage suction cup trained suction cups 6 of the transport element 4 in the area of Front edge (gripper edge) gripped and by a vertical movement the vacuum from the sheet stack 2 isolated. After that the bow 1 over the feed table 7 located in front of the sheet stack 2 up to those at the front end of the feed table Feed marks 8 promoted and released by the suction cups 6.
  • the suction cups 6 become vertical again before the swinging back process moved and over the sheet stack 2 after completion of the swing back movement lowered onto the sheet stack 2; after that begins the process described again.
  • a pre-gripper 5 is arranged below the feed table 7. This pre-gripper is designed as a suction oscillator. The vacuum cleaner takes the sheet 1 from the feed table 7, accelerated him and passes it to one of the gripper rows 9 Sheet transport drum 3.
  • the sheet is fed to the sheet transport drum 5 only to every second row of grippers 9.
  • the design of the feed device as two suction oscillators leads through the use of air as a holding element and of the valve control elements used to a very low mass Construction and therefore no dynamic loads, which means high speeds are possible.

Landscapes

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

Description

Die Erfindung betrifft eine Einrichtung zum Zuführen von Bogen von einem Bogenstapel zü 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 (US-A-4 343 462) , die einen dreifachgroßen Druckzylinder mit drei Drucksätteln und drei Greiferreihen aufweisen, wobei der Druckzylinder mit einem doppeltgroßen Offsetzylinder 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 machines are known (US-A-4,343,462) who have a triple size Printing cylinder with three pressure calipers and three rows of grippers have, the printing cylinder with a double-sized Offset cylinder and this with a double-sized plate cylinder cooperates. The plate cylinder are two alternate in operative connection with the two pressure plates of the plate cylinder bringable inking units and dampening units assigned.

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 impression cylinder. After the multi-colored Printing on the three sheets takes place at two cylinder revolutions feeding the next three sheets.

Nachteilig ist der beschriebene Verfahrensablauf, der eine Leistungssteigerung nicht zuläßt.A disadvantage is the process sequence described, which increases performance does not allow.

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 Feed sheets with high feed rate and low dynamic Charges.

Erfindungsgemäß wird die Aufgabe durch das Kennzeichen des Patentanspruchs gelöst.According to the invention the object is characterized by the characterizing part of the claim solved.

Nachfolgend wird die Erfindung an einem Ausführungsbeispiel näher erläutert.The invention is explained in more detail below using an exemplary embodiment explained.

In der Zeichnung zeigt

Fig. 1
Zuführeinrichtung
Fig. 2
s/v/b-Diagramm.
In the drawing shows
Fig. 1
Feeding device
Fig. 2
b / v / b diagram.

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.In Fig. 1, a feed device is shown schematically, the feed device the top sheet 1 of each a sheet stack 2 isolated and the same up to a sheet transport drum 3 promotes.

Die Bogentransporttrömmel 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 Normalzylinder dreifachgroß.The sheet transport drum 3 is a printing cylinder with three rows of grippers 9, three cylinder channels 12 and with three pressure calipers 10 trained. The sheet transport drum 3 is in relation to a not shown having only one pressure saddle 10 Standard cylinder three times the size.

Die Bogentransporttrommel 3 steht mit mindestens einem mit Drucktuch bespannten Offsetzylinder 11 in Wirkverbindung, wobei der Offsetzylinder 11 zwei Drucktuchsättel 13 aufweist und gegenüber dem erwähnten Normalzylinder doppeltgroß ist.The sheet transport drum 3 stands with at least one with a printing blanket Covered offset cylinder 11 in operative connection, the Offset cylinder 11 has two blanket saddles 13 and opposite the normal cylinder mentioned is double in size.

Der Offsetzylinder 11 steht mit einem ebenfalls doppeltgroßen Druckformzylinder 14 mit zwei Druckformsätteln 15, auf welchen je eine Druckform aufgespannt ist, in Wirkverbindung.The offset cylinder 11 is also double-sized Printing form cylinder 14 with two printing form saddles 15, on which one printing form each is clamped, in operative connection.

Die Zuführeinrichtung besteht aus einem Transportelement 4 und einem Vorgreifer 5.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 above the sheet stack 2, preferably arranged in the front area of the uppermost sheet 1, connected to a vibratory drive, not shown and trained as a suction transducer. The suction cup 6 of the suction oscillator are preferably as so-called three-stage suction cups educated.

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 befindlichen 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.The top sheet 1 is used as a three-stage suction cup trained suction cups 6 of the transport element 4 in the area of Front edge (gripper edge) gripped and by a vertical movement the vacuum from the sheet stack 2 isolated. After that the bow 1 over the feed table 7 located in front of the sheet stack 2 up to those at the front end of the feed table Feed marks 8 promoted and released by the suction cups 6. The suction cups 6 become vertical again before the swinging back process moved and over the sheet stack 2 after completion of the swing back movement lowered onto the sheet stack 2; after that begins the process described 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 vacuum cleaner takes the sheet 1 from the feed table 7, accelerated him and passes it to one of the gripper rows 9 Sheet transport drum 3.

Die Bogenzuführung zur Bogentransporttrommel 5 erfolgt dabei nur an jede zweite Greiferreihe 9.The sheet is fed to the sheet transport drum 5 only to every second row of grippers 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 backward 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 at which the cylinder channel 12 of the sheet transport drum 3 said Connection line 16 passes.

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 through the use of air as a holding element and of the valve control elements used to a very low mass Construction and therefore no dynamic loads, which means 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). By an asymmetrical shift of the turning point (WP) of the Swinging motion of the pre-gripper in favor of minimal acceleration of the sheet is optimally influenced by the register (Fig. 2).

BezugszeichenaufstellungList of reference symbols

11
oberster Bogentop bow
22nd
BogenstapelSheet stack
33rd
BogentransporttrommelSheet transport drum
44th
TransportelementTransport element
55
VorgreiferForerunner
66
SaugerMammal
77
AnlegtischFeed table
88th
AnlegmarkenLanding marks
99
GreiferreiheRow of grippers
1010th
DrucksattelPressure saddle
1111
OffsetzylinderOffset cylinder
1212th
ZylinderkanalCylinder channel
1313
DrucktuchsattelBlanket saddle
1414
DruckformzylinderPrinting form cylinder
1515
DruckformsattelPrinting form saddle
1616
VerbindungslinieConnecting line
ss
Wegpath
vv
Geschwindigkeitspeed
bb
Beschleunigungacceleration
WPWP
WendepunktTurning point

Claims (4)

  1. Device for feeding a sheet from a pile to a sheet transport drum of a printing press wherein a transport element (4) connected with a swing drive and designed as a sucker is arranged above the pile (2) gripping the top sheet to be fed (1) of the pile (2), separating the sheet from the pile (2) and transporting the sheet over a feed table (7) to the head stops (8); and wherein a swing gripper (5) designed as a sucker swing arm (5) is arranged below the feed table level (7) gripping the sheet to be fed (1), accelerating the sheet and transferring the sheet to the sheet transport drum (3).
  2. Device for feeding as in claim 1 wherein the sheet transport drum (3) is designed as a triple-size impression cylinder with three printing saddles (10) and three gripper rows (9) acting in combination with a double-size offset cylinder (11) with two printing blanket saddles (13); and wherein only every second gripper row (9) is fed with a sheet (1).
  3. Device for feeding as in claim 1 wherein the reverse swinging motion of the swing gripper (5) designed as a sucker swing arm is carried out through a cylinder gap (12) of the sheet guiding cylinder (3).
  4. Device for feeding as in claim 1 wherein the reversal point of the swinging motion of the swing gripper (5) designed as a sucker swing arm is asymmetrically shifted in favour of a minimum acceleration of the sheet (1).
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 EP0939738A1 (en) 1999-09-08
EP0939738B1 true 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014812A1 (en) 2008-03-18 2009-09-24 Koenig & Bauer Aktiengesellschaft Device for feeding sheets

Families Citing this family (1)

* 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

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014812A1 (en) 2008-03-18 2009-09-24 Koenig & Bauer Aktiengesellschaft Device for feeding sheets
EP2105395A1 (en) 2008-03-18 2009-09-30 Koenig & Bauer AG Device for inserting sheets

Also Published As

Publication number Publication date
DE59703364D1 (en) 2001-05-17
DE19644944A1 (en) 1998-04-30
EP0939738A1 (en) 1999-09-08
WO1998018704A1 (en) 1998-05-07

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