EP0709186B1 - In-feed gripper for rotary sheet printing machines - Google Patents
In-feed gripper for rotary sheet printing machines Download PDFInfo
- Publication number
- EP0709186B1 EP0709186B1 EP95116071A EP95116071A EP0709186B1 EP 0709186 B1 EP0709186 B1 EP 0709186B1 EP 95116071 A EP95116071 A EP 95116071A EP 95116071 A EP95116071 A EP 95116071A EP 0709186 B1 EP0709186 B1 EP 0709186B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pregripper
- apex
- gripper
- hollow cylinder
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- 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 pre-gripper for sheet-fed rotary printing machines, that of the precisely fitting sheet transfer of an aligned one Bow is used on a system drum or a printing cylinder.
- the pre-gripper is suitable for the transport of substrates in the form of paper, cardboard or sheet metal.
- a pre-gripper of this type is known from DE-AS 2 156 577. He consists essentially of a cylindrical tube on which Brackets are releasably connected, which carry the gripper bridges.
- a disadvantage of these designs is that at higher machine speeds and higher requirements on the registration Bending and torsional moments negatively affect print quality impact.
- Another disadvantage is the complex assembly. So must among other things, with a pre-gripper disassembly of the drive lever from Pre-gripper tube are dismantled to remove the tube.
- the object of the invention is to develop a solution that high bending and torsional rigidity to achieve a high Fits in register and preferably requires little assembly or disassembly owns.
- the task is solved by the characterizing part of the main claim. Further training results from the subclaims.
- the solution according to the invention provides a flexurally and torsionally rigid Pre-gripper that is easy to assemble at the same time.
- the bending and Torsionally rigid training ensures high register stability and thereby improves the print quality. Compared to previous ones Versions reduces the number of parts and the execution is easy to assemble.
- the axis of inertia is preferably on the axis of rotation of the pre-gripper.
- the pre-gripper is in its cross section formed as a hollow cylinder oval (oval), the The crossbar carrying the gripper bar preferably with the hollow cylinder represents a component.
- the hollow cylinder communicating several in the axial direction Have breakthroughs. These breakthroughs can also be made in the jetty or the gripper bar be arranged.
- the oval hollow cylinder is preferably made of aluminum or it is Aluminum as a material contained in the hollow cylinder.
- Another Mass reduction is achieved when the hollow cylinder is designed made of a carbon fiber material (CFRP).
- a system 1 is arranged in a sheet-fed rotary printing press.
- a vibrating pre-gripper is arranged below the system 1.
- the pre-gripper consists of an oval hollow cylinder 7, which in the Cross section a vertex 8 with maximum curvature and one Vertex 15 with less in relation to vertex 8 Has curvature.
- the wall thickness of the egg-shaped hollow cylinder 7 seen in cross-section takes from vertex 8 to vertex 15 towards.
- a web 3 is arranged near the apex 8, which carries a gripper bar 2.
- the web 3 is a gripper shaft 4 adjacent which has a plurality of grippers 5 wearing.
- Gripper impact bar 2, gripper shaft 4 and the grippers 5 form a gripper bridge in a known manner.
- An axis of rotation 9 is arranged adjacent to the apex 15, on which the pre-gripper's axis of inertia lies at the same time.
- the gripper is in the axis of rotation due to its oval hollow cylinder 7 9 with one each in the machine frame 11 of the printing press Center bearing pin 10 centered and detachable with screws connected.
- the hollow cylinder 7 faces each in the axial direction Front (base and top surface of the hollow cylinder) a flat surface 14 on a flat surface 14 'of the respective journal 10 is assigned.
- the hollow cylinder points in the radial direction each end face a centering 13, the one circumferential Centering 13 'of the respective journal 10 is assigned.
- the Bearing journals 10 are each in a bearing 12 of the respective machine frame 11 recorded and protrude into the space between the two Machine frames 11 in the direction of one end of the Hollow cylinder 7.
- Hollow cylinder 7 and the journal 10 are through several connecting elements, e.g. Screws, releasably form-fitting connected, which is indicated in Fig. 2 by the chain lines is.
- a pre-gripper is shown in its hollow cylinder 7 openings 16 has.
- the Web 3 or the gripper bar 2 also openings 16 exhibit.
- the openings 16 serve to avoid a dynamic pressure or negative pressure between the pre-gripper and the substrate can build or dismantle.
- the pressure conditions can compensated by the air flow 17 flowing through the openings 16 be what improves the sheet guidance.
- the swinging Pre-gripper takes over from the front brands in a more familiar way Way the sheet fed via the system 1 in the conveying direction 6 and passes it, accelerated to press speed, to a feed drum for further transport to a printing cylinder.
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)
Abstract
Description
Die Erfindung betrifft einen Vorgreifer für Bogenrotationsdruckmaschinen, der der passgenauen Bogenübergabe eines ausgerichteten Bogens an eine Anlagetrommel oder einen Druckzylinder dient. Der Vorgreifer eignet sich dabei für den Transport von Bedruckstoffen in Form von Papier, Karton oder Blech.The invention relates to a pre-gripper for sheet-fed rotary printing machines, that of the precisely fitting sheet transfer of an aligned one Bow is used on a system drum or a printing cylinder. Of the The pre-gripper is suitable for the transport of substrates in the form of paper, cardboard or sheet metal.
Ein Vorgreifer dieser Art ist aus der DE-AS 2 156 577 bekannt. Er besteht im wesentlichen aus einem zylindrischen Rohr, an dem Halterungen lösbar verbunden sind, die die Greiferbrücken tragen.A pre-gripper of this type is known from DE-AS 2 156 577. He consists essentially of a cylindrical tube on which Brackets are releasably connected, which carry the gripper bridges.
Nachteilig bei diesen Ausführungen ist es, daß bei höheren Maschinengeschwindigkeiten und höheren Anforderungen an die Passerhaltigkeit Biege- und Torsionsmomente sich negativ auf die Druckqualität auswirken. Ein weiterer Nachteil ist die aufwendige Montage. So muß unter anderem bei einer Vorgreiferdemontage der Antriebshebel vom Vorgreiferrohr demontiert werden um das Rohr auszubauen.A disadvantage of these designs is that at higher machine speeds and higher requirements on the registration Bending and torsional moments negatively affect print quality impact. Another disadvantage is the complex assembly. So must among other things, with a pre-gripper disassembly of the drive lever from Pre-gripper tube are dismantled to remove the tube.
Aufgabe der Erfindung ist es eine Lösung zu entwickeln, die eine hohe Biege- und Torsionssteifigkeit zur Erzielung einer hohen Passerhaltigkeit und bevorzugt einen geringen Montage- bzw. Demontageaufwand besitzt.The object of the invention is to develop a solution that high bending and torsional rigidity to achieve a high Fits in register and preferably requires little assembly or disassembly owns.
Gelöst wird die Aufgabe durch den kennzeichnenden Teil des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen. Die erfindungsgemäße Lösung stellt einen biege- und torsionssteifen Vorgreifer dar, der gleichzeitig montagefreundlich ist. Die biege- und torsionssteife Ausbildung gewährleistet eine hohe Passerhaltigkeit und verbessert dadurch die Druckqualität. Gegenüber bisherigen Ausführungen wird die Teilevielfalt reduziert und die Ausführung ist montagefreundlich. Die Trägheitsachse liegt vorzugsweise auf der Drehachse des Vorgreifers. Der Vorgreifer ist in seinem Querschnitt als Hohlzylinder eiförmig (oval) ausgebildet, wobei der die Greiferaufschlagleiste tragende Steg vorzugsweise mit dem Hohlzylinder ein Bauteil darstellt. Um den Bogen ruhig auf der Anlage zu führen, kann zum Auf- oder Abbau eines möglichen Staudruckes (bei höheren Maschinengeschwindigkeiten) oder eines Unterdruckes der Hohlzylinder in axialer Richtung mehrere kommunizierende Durchbrüche aufweisen. Diese Durchbrüche können auch im Steg oder der Greiferaufschlagleiste angeordnet sein. Zur Massereduzierung besteht der ovale Hohlzylinder bevorzugt aus Aluminium oder es ist Aluminium als Werksstoff im Hohlzylinder enthalten. Eine weitere Massereduzierung erreicht man bei der Ausbildung des Hohlzylinders aus einem Kohlefaserwerkstoff (CFK).The task is solved by the characterizing part of the main claim. Further training results from the subclaims. The solution according to the invention provides a flexurally and torsionally rigid Pre-gripper that is easy to assemble at the same time. The bending and Torsionally rigid training ensures high register stability and thereby improves the print quality. Compared to previous ones Versions reduces the number of parts and the execution is easy to assemble. The axis of inertia is preferably on the axis of rotation of the pre-gripper. The pre-gripper is in its cross section formed as a hollow cylinder oval (oval), the The crossbar carrying the gripper bar preferably with the hollow cylinder represents a component. To calm the bow on the layout can lead to the build-up or reduction of a possible back pressure (at higher machine speeds) or a vacuum the hollow cylinder communicating several in the axial direction Have breakthroughs. These breakthroughs can also be made in the jetty or the gripper bar be arranged. For mass reduction the oval hollow cylinder is preferably made of aluminum or it is Aluminum as a material contained in the hollow cylinder. Another Mass reduction is achieved when the hollow cylinder is designed made of a carbon fiber material (CFRP).
Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Dabei zeigen:
- Fig. 1
- den Vorgreifer im Querschnitt (Schnitt A - A),
- Fig. 2
- den Vorgreifer in axialer Verbindung mit einem Lagerzapfen,
- Fig. 3
- den Vorgreifer in Weiterbildung der Fig. 1.
- Fig. 1
- the pre-gripper in cross section (section A - A),
- Fig. 2
- the pre-gripper in axial connection with a bearing journal,
- Fig. 3
- the pre-gripper in a further development of FIG. 1.
In einer Bogenrotationsdruckmaschine ist eine Anlage 1 angeordnet.
Unterhalb der Anlage 1 ist ein schwingender Vorgreifer angeordnet.
Der Vorgreifer besteht aus einem ovalen Hohlzylinder 7, der im
Querschnitt einen Scheitelpunkt 8 mit maximaler Krümmung und einen
Scheitelpunkt 15 mit in Bezug auf den Scheitelpunkt 8 geringerer
Krümmung aufweist. Die Wanddicke des eiförmigen Hohlzylinders 7
nimmt im Querschnitt gesehen vom Scheitelpunkt 8 zum Scheitelpunkt
15 hin zu. In der Nähe des Scheitelpunktes 8 ist ein Steg 3 angeordnet,
welcher eine Greiferaufschlagleiste 2 trägt. Dem Steg 3 ist
eine Greiferwelle 4 benachbart, welche eine Mehrzahl von Greifern 5
trägt. Greiferaufschlagleiste 2, Greiferwelle 4 sowie die Greifer 5
bilden in bekannter Weise eine Greiferbrücke.A system 1 is arranged in a sheet-fed rotary printing press.
A vibrating pre-gripper is arranged below the system 1.
The pre-gripper consists of an oval
Dem Scheitelpunkt 15 benachbart ist eine Drehachse 9 angeordnet,
auf der gleichzeitig die Trägheitsachse des Vorgreifers liegt. Der
Vorgreifer ist durch seinen ovalen Hohlzylinder 7 in der Drehachse
9 mit je einem im Maschinengestell 11 der Druckmaschine gelagerten
Lagerzapfen 10 stirnseitig zentriert und mittels Schrauben lösbar
verbunden. Der Hohlzylinder 7 weist in axialer Richtung an jeder
Stirnseite (Grund- und Deckfläche des Hohlzylinders) eine Planfläche
14 auf, der eine Planfläche 14' des jeweiligen Lagerzapfens
10 zugeordnet ist. In radialer Richtung weist der Hohlzylinder an
jeder Stirnseite eine Zentrierung 13 auf, der eine umfangsseitige
Zentrierung 13' des jeweiligen Lagerzapfens 10 zugeordnet ist. Die
Lagerzapfen 10 sind in je einer Lagerung 12 des jeweiligen Maschinengestells
11 aufgenommen und ragen in den Zwischenraum der beiden
Maschinengestelle 11 in Richtung jeweils einer Stirnseite des
Hohlzylinders 7. Hohlzylinder 7 und die Lagerzapfen 10 sind durch
mehrere Verbindungselemente, z.B. Schrauben, lösbar formschlüssig
verbunden, was in Fig. 2 durch die Strichpunktlinien angedeutet
ist.An axis of
In Fig. 3 ist ein Vorgreifer dargestellt, der in seinem Hohlzylinder
7 Durchbrüche 16 aufweist. Je nach Ausführung kann der
Steg 3 oder die Greiferaufschlagleiste 2 ebenfalls Durchbrüche 16
aufweisen. Die Durchbrüche 16 dienen der Vermeidung eines Staudruckes
oder Unterdruckes, der sich zwischen Vorgreifer und Bedruckstoff
auf- oder abbauen kann. Die Druckverhältnisse können
durch die die Durchbrüche 16 durchströmende Luftströmung 17 ausgeglichen
werden, was die Bogenführung verbessert. Der schwingende
Vorgreifer übernimmt von den Vordermarken in an sich bekannter
Weise den über die Anlage 1 in Förderrichtung 6 zugeführten Bogen
und übergibt diesen, auf Druckmaschinengeschwindigkeit beschleunigt,
an eine Anlegetrommel zum weiteren Transport an einen Druckzylinder. In Fig. 3, a pre-gripper is shown in its
- 11
- Anlageinvestment
- 22nd
- GreiferaufschlagleisteGripper impact bar
- 33rd
- Stegweb
- 44th
- GreiferwelleGripper shaft
- 55
- GreiferGripper
- 66
- FörderrichtungDirection of conveyance
- 77
- HohlzylinderHollow cylinder
- 88th
- ScheitelpunktVertex
- 99
- DrehachseAxis of rotation
- 1010th
- LagerzapfenBearing journal
- 1111
- MaschinengestellMachine frame
- 1212th
- Lagerungstorage
- 1313
- Zentrierungcentering
- 13'13 '
- Zentrierungcentering
- 1414
- PlanflächeFlat area
- 14'14 '
- PlanflächeFlat area
- 1515
- ScheitelpunktVertex
- 1616
- Durchbruchbreakthrough
- 1717th
- LuftströmungAir flow
Claims (10)
- Pregripper for sheet-fed rotary printing machines, having a gripper bridge formed from a gripper impact strip, a gripper shaft and a plurality of grippers, characterized in that the pregripper is formed from a hollow cylinder (7) which is oval in cross-section with an apex (8) having a maximum curvature and an apex (15) having a lesser curvature, the gripper bridge (2, 4, 5) being arranged adjacently at the apex (8) and an axis of rotation (9) being arranged adjacently at the apex (15).
- Pregripper according to Claim 1, characterized in that the hollow cylinder (7) has a web (3) which is adjacent to the apex (8) and to which the gripper bridge (2, 4, 5) is assigned.
- Pregripper according to Claim 1, characterized in that, in cross-section, the wall thickness of the hollow cylinder (7) increases from the apex (8) to the apex (15).
- Pregripper according to Claim 1, characterized in that the hollow cylinder (7) has communicating openings (16) arranged in the axial direction.
- Pregripper according to Claim 1, characterized in that the oval hollow cylinder (7) is centred at the end face in the axis of rotation (9) in each case by a bearing journal (10) held in the machine frame (11) and is releasably connected.
- Pregripper according to Claims 1 and 5, characterized in that the hollow cylinder (7) and each bearing journal (10) are connected in a releasable and positive-locking manner axially by planar surfaces (14, 14') and radially by centring means (13, 13').
- Pregripper according to Claim 1, characterized in that the bearing journal (10) is an inner ring of a bearing (12) held in the machine frame (11).
- Pregripper according to Claim 1, characterized in that the hollow cylinder (7) is formed from aluminium, or contains aluminium as a material, or is formed from a carbon fibre material.
- Pregripper according to Claim 1, characterized in that the axis of inertia of the pregripper lies on the axis of rotation (9).
- Pregripper according to Claim 1 or 4, characterized in that the web (3) and/or the gripper impact strip (2) have openings (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4438757A DE4438757C2 (en) | 1994-10-29 | 1994-10-29 | Pre-gripper for sheet-fed rotary printing machines |
| DE4438757 | 1994-10-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0709186A1 EP0709186A1 (en) | 1996-05-01 |
| EP0709186B1 true EP0709186B1 (en) | 1998-04-22 |
Family
ID=6532058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95116071A Expired - Lifetime EP0709186B1 (en) | 1994-10-29 | 1995-10-12 | In-feed gripper for rotary sheet printing machines |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5575209A (en) |
| EP (1) | EP0709186B1 (en) |
| JP (1) | JP2918094B2 (en) |
| AT (1) | ATE165276T1 (en) |
| DE (2) | DE4438757C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10332672A1 (en) * | 2003-07-18 | 2005-02-10 | Koenig & Bauer Ag | Preliminary grip for sheet processing machine has preliminary grip bearing axis fixed to preliminary grip shaft |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753137C1 (en) * | 1997-11-29 | 1998-10-15 | Roland Man Druckmasch | Sheet-guide and handler for printing machine |
| DE10023669C1 (en) * | 2000-05-16 | 2001-06-28 | Roland Man Druckmasch | Control device for gripper in sheet processing machine has deflection of roller lever supporting cam roller trasmitted by coupling drive to gripper shaft for sheet gripper |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE614043C (en) * | 1933-01-29 | 1935-05-31 | Vomag Betr S A G | Sheet feeder for printing machines |
| DE739377C (en) * | 1938-05-20 | 1943-09-25 | Planeta Druckmaschinenwerk Ag | Process for the correct alignment and application of sheets to rotating cylinders, in particular of printing machines |
| US2220046A (en) * | 1938-12-10 | 1940-10-29 | Lang Karl Theodor | Sheet feeding device |
| GB676218A (en) * | 1949-03-04 | 1952-07-23 | Miehle Printing Press & Mfg | Method of transferring lapped sheets |
| US3647205A (en) * | 1970-05-15 | 1972-03-07 | Polygraph Leipzig | Method and apparatus for feeding of sheets fittingly aligned to a machine |
| DE2156577B2 (en) * | 1971-11-15 | 1974-07-04 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach | Pre-gripper swing system |
| DE3529596A1 (en) * | 1985-08-19 | 1987-02-26 | Roland Man Druckmasch | SPRING GRIPPER FOR ARC ROTATION PRINTING MACHINES |
| DE4127713C2 (en) * | 1991-08-22 | 1996-03-21 | Koenig & Bauer Albert Ag | Grippers for sheet-fed rotary printing machines |
-
1994
- 1994-10-29 DE DE4438757A patent/DE4438757C2/en not_active Expired - Fee Related
-
1995
- 1995-10-12 DE DE59501980T patent/DE59501980D1/en not_active Expired - Lifetime
- 1995-10-12 EP EP95116071A patent/EP0709186B1/en not_active Expired - Lifetime
- 1995-10-12 AT AT95116071T patent/ATE165276T1/en not_active IP Right Cessation
- 1995-10-25 US US08/548,102 patent/US5575209A/en not_active Expired - Fee Related
- 1995-10-26 JP JP7278884A patent/JP2918094B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10332672A1 (en) * | 2003-07-18 | 2005-02-10 | Koenig & Bauer Ag | Preliminary grip for sheet processing machine has preliminary grip bearing axis fixed to preliminary grip shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4438757C2 (en) | 1997-09-11 |
| US5575209A (en) | 1996-11-19 |
| EP0709186A1 (en) | 1996-05-01 |
| DE59501980D1 (en) | 1998-05-28 |
| DE4438757A1 (en) | 1996-05-02 |
| ATE165276T1 (en) | 1998-05-15 |
| JPH08207246A (en) | 1996-08-13 |
| JP2918094B2 (en) | 1999-07-12 |
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