EP0919378B1 - Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine - Google Patents

Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine Download PDF

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Publication number
EP0919378B1
EP0919378B1 EP98121722A EP98121722A EP0919378B1 EP 0919378 B1 EP0919378 B1 EP 0919378B1 EP 98121722 A EP98121722 A EP 98121722A EP 98121722 A EP98121722 A EP 98121722A EP 0919378 B1 EP0919378 B1 EP 0919378B1
Authority
EP
European Patent Office
Prior art keywords
gripper
sheet
sheet guiding
nozzles
guiding device
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
EP98121722A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0919378A1 (de
Inventor
Erich Pietsch
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0919378A1 publication Critical patent/EP0919378A1/de
Application granted granted Critical
Publication of EP0919378B1 publication Critical patent/EP0919378B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers

Definitions

  • the invention relates to a sheet guiding device in the area of gripper systems a printing press according to the preamble of the main claim.
  • a sheet guiding device of this type is known from DE 196 05 420 C1.
  • This device is intended to prevent the underside of the sheet from touching the gripper of the vibratory system, also called the pre-gripper, and to enable trouble-free sheet transfer, regardless of the format width, to a subsequent sheet guiding system, for example a feed drum.
  • the pre-gripper has nozzles arranged between its gripper cuffs and their flow is directed towards the front edge of the sheet and can be blown with air. The blown air can flow clocked as well as non-clocked onto the front edge of the sheet, the pressure being adjustable.
  • the nozzles are assigned to the side of the gripper pads and continue to be directed towards the front edge of the sheet in their flow direction.
  • the pressure level of the blown air flow is lower during the forward movement of the pre-gripper from the feed table to the sheet guide system, while the pressure is increased when the pre-gripper moves back from the sheet guide system to the feed table.
  • the blowing nozzles are directed at a right angle to the underside of the sheet, it is disadvantageous that the blowing nozzles require additional space in addition to the pre-gripper or the pre-gripper pads. However, this space must be kept free for the grippers of the sheet guiding system, for example a feed drum, when the gripper systems are handed over from the pre-gripper to the sheet guiding system.
  • the blowing nozzles must end at the pre-gripper at a greater distance from the underside of the sheet. Furthermore, it is disadvantageous that the blowing air must be adjustable in its printing energy directed towards the underside of the sheet, since the weight per unit area of the printing material to be processed must be taken into account with regard to the printing energy. Finally, with this design, additional flow turbulence must be taken into account, which, taking into account the basis weight, is caused by the acceleration moments of the sheet from zero (resting position on the feed table) to the machine speed of the sheet guiding system and by the drag flow with blowing air switched off during the sheet transfer to the sheet guiding system.
  • a pre-gripper as a vibrating system for sheet-fed rotary machines with grippers and a large number of pre-grippers is out, for example known from DE 44 38 757 C2.
  • the invention has for its object a sheet guiding device of the beginning to create described type that avoids the disadvantages mentioned, the in particular regardless of the basis weight, format and gripper pitch of the processing substrate allows a more uniform sheet guidance and improved sheet transfer allowed.
  • the solution according to the invention is based on a sheet guiding device which in the area of the gripper systems, especially the gripper surcharges, on a pre-gripper and / or sheet guide systems, for example sheet guide cylinders is.
  • the sheet guiding device is at least made of pneumatically actuated, the nozzles assigned to the gripper serves, their flow direction the blowing air escaping parallel to the substrate underside and across whose direction of conveyance is directed.
  • the device according to the invention makes it possible to use a uniform one Guiding and handing over the sheets to be processed from one system Pre-gripper to a first sheet guiding system and from there in the conveying direction subsequent sheet guiding systems, preferably sheet guiding cylinders, to hand over.
  • the pre-gripper and the sheet guiding systems point in the Gripper systems together or individually as well as in groups according to the invention Training characteristics of the institution.
  • the curve guidance is not based on the basis weight and / or the bending stiffness depending on the respective substrate. Likewise, one of the basis weight, pressure regulation dependent on the bending stiffness is not required. One time The pressure set on a printing material must be maintained approximately constant. The - due to the format to be processed - between those due to the gripper division Fixed gripper systems will expose the bow to the blown air flow "floating" in a conveyor level. The funding level is more ideal Way through the top of the gripper serves of the pre-gripper and / or Determined sheet guide cylinder. Exposed arch corners are covered by the Blown air flow extended laterally outwards (transverse to the direction of conveyance) and are therefore in the mentioned funding level.
  • a sheet-fed rotary printing press consists, among other things, of a system 14 a sheet 1, which is in the conveying direction 13 from a feed table, e.g. a suction belt table, coming against the leading edges and laterally aligned becomes.
  • the system 14 is integrated flush with the conveyor level and - preferably transversely to the conveying direction 13 - a plurality of blow-suction nozzles which can be acted upon pneumatically 15 arranged.
  • the blow-suction nozzles 15 each have a feed channel 16 coupled, the feed channels 16 with a pneumatic system for the air supply are connected.
  • Each blowing / suction nozzle 15 is integrated in the system 14 an insert element 17 associated with the surface of the system 14 Funding level for the sheet 1 forms.
  • the system 14 is assigned a pre-gripper 6 adjacent as a vibrating system.
  • the Pre-gripper 6 consists of a in the printing press in the machine frame mounted oval hollow cylinder with a web 18.
  • the web 18 is a gripper system assigned by a gripper shaft 7 with a plurality of Grippers 9 and this associated gripper cuffs 2 is formed.
  • the grabs 9 are in a known manner by means of spring force against the gripper arms 2nd guided and by means of gear mechanisms against the spring force of the gripper serves 2 pivoted.
  • the pre-gripper 6 is in the conveying direction 13 a sheet guiding system 10 with at least one corresponding gripper system 9,7,2 subordinate.
  • the sheet guide system 10 is as a feed drum formed as the first sheet guide cylinder, the sheet 1 to a further sheet guide cylinder, preferably an impression cylinder, in hands over to a printing unit. From this sheet guide cylinder, sheet 1 to subsequent sheet guiding cylinders, preferably transfer cylinders and Printing cylinder, handed over for further processing.
  • the gripper cuffs 2 are each pneumatically actuated Nozzle 3 assigned parallel to the underside of the sheet 21 and transversely to the conveying direction 13, a flow direction 8 for blowing air is generated to the Guide sheet 1 on the funding level.
  • each gripper impact 2 has a flow channel 4, which is in functional connection with a blown air supply 5, the Blown air supply lines 5 are coupled to a pneumatic system 19.
  • each has a sheet underside 21, preferably immediately adjacent thereto Gripper impact 2 on at least one end face 22, a nozzle 3, with its Flow direction 8 parallel to the underside of the arc 21 and transversely to the conveying direction 13 is directed to guide the sheet 1 in the conveying plane.
  • the arrangement of the nozzles 3 is integrated into the gripper cuffs 2.
  • the format area 20 is through the side edges for processing upcoming sheets with a minimum format width of 12 and a maximum Format width 11 formed.
  • the blowing air can be applied Nozzles 3 at least in one end face 22 of the gripper cuffs 2 arranged integrated in this, the flow direction 8 at least in Direction side edges of the sheet 1 are directed.
  • the nozzles 3 with flow direction 8 during printing operation can be set to an essentially constant pressure energy.
  • the sheet 1 in the rest position 14 is aligned with the leading edge and the side edge, is then gripped by the pre-gripper 6 by means of grippers 9 and gripper impact 2 on the leading edge of the sheet and transferred to the downstream sheet guiding system 10 by means of a swinging movement.
  • the grippers 9 are arranged at a defined distance from one another on the gripper shaft 7 (gripper pitch).
  • a sheet 1 with a format width arrives for processing within the format area 20, the side areas (including the side edges) of which are not gripped by a gripper 9 with an associated gripper cuff 2, the protruding side areas of the printing material bend, since the side edges in the free space between two grippers 9 end. Since the grippers 9 of the subsequent sheet guiding system 10 are arranged in a gap (in the free space) between the grippers 9 of the pre-gripper 6, there is a risk that the side areas of the sheets 1 will not be gripped, bent and / or torn during the transfer, which in addition to the Damage to the substrate also negatively affects the registration accuracy.
  • the underside of the arc 21 is guided on the air jet in the flow direction 8, floating in the conveying plane.
  • the grippers 9 of the sheet guiding system 10 also grasp the side areas of the sheets 1 in a register-appropriate manner due to the flatness of the printing material on the front edge and possible damage is noticeably reduced or eliminated.
  • the device according to the invention is not limited to the example shown. Rather, the gripper serves 2 can be acted upon pneumatically
  • nozzles 3 also in gripper systems 9, 7, 2 (with Grippers 9, gripper shaft 7 and gripper serves 2) can be used as they are in sheet guiding systems 10 are known.
  • the device according to the invention can also be used in gripper systems 9, 7, 2 interacting in pairs.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Discharge By Other Means (AREA)
EP98121722A 1997-11-29 1998-11-14 Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine Expired - Lifetime EP0919378B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753137A DE19753137C1 (de) 1997-11-29 1997-11-29 Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine
DE19753137 1997-11-29

Publications (2)

Publication Number Publication Date
EP0919378A1 EP0919378A1 (de) 1999-06-02
EP0919378B1 true EP0919378B1 (de) 2002-08-21

Family

ID=7850322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121722A Expired - Lifetime EP0919378B1 (de) 1997-11-29 1998-11-14 Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine

Country Status (4)

Country Link
EP (1) EP0919378B1 (ja)
JP (1) JP2983977B2 (ja)
AT (1) ATE222537T1 (ja)
DE (2) DE19753137C1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047000A1 (en) * 2003-11-17 2005-05-26 Silverbrook Research Pty Ltd Blower box assembly for a printer
DE102007030456A1 (de) 2007-06-29 2009-01-02 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Führen von Bogen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011186B4 (de) * 2000-03-08 2008-09-04 Koenig & Bauer Aktiengesellschaft Einrichtung zum Führen von Bogen
JP2008156123A (ja) 2006-12-21 2008-07-10 Heidelberger Druckmas Ag シートを処理する機械に向かってシートを供給するための装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE113533T1 (de) * 1990-12-10 1994-11-15 Heidelberger Druckmasch Ag Vorrichtung zur bogenglättung am druckzylinder in einer bogenrotationsdruckmaschine.
DE4438757C2 (de) * 1994-10-29 1997-09-11 Roland Man Druckmasch Vorgreifer für Bogenrotationsdruckmaschinen
DE19605420C1 (de) * 1996-02-14 1997-04-10 Kba Planeta Ag Bogenleiteinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047000A1 (en) * 2003-11-17 2005-05-26 Silverbrook Research Pty Ltd Blower box assembly for a printer
DE102007030456A1 (de) 2007-06-29 2009-01-02 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Führen von Bogen
DE102007030456B4 (de) * 2007-06-29 2009-04-23 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Führen von Bogen

Also Published As

Publication number Publication date
EP0919378A1 (de) 1999-06-02
DE59805239D1 (de) 2002-09-26
DE19753137C1 (de) 1998-10-15
ATE222537T1 (de) 2002-09-15
JP2983977B2 (ja) 1999-11-29
JPH11227159A (ja) 1999-08-24

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