EP0614838B1 - Exchangeable press bushing - Google Patents

Exchangeable press bushing Download PDF

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Publication number
EP0614838B1
EP0614838B1 EP93119506A EP93119506A EP0614838B1 EP 0614838 B1 EP0614838 B1 EP 0614838B1 EP 93119506 A EP93119506 A EP 93119506A EP 93119506 A EP93119506 A EP 93119506A EP 0614838 B1 EP0614838 B1 EP 0614838B1
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EP
European Patent Office
Prior art keywords
nip
transporting device
sleeve
engageable
roller
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
EP93119506A
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German (de)
French (fr)
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EP0614838A1 (en
Inventor
David C. Burke
Mike A. Novick
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0614838A1 publication Critical patent/EP0614838A1/en
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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
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53657—Means to assemble or disassemble to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Definitions

  • the present invention relates to a device for transporting material webs in a rotary printing press or in a folder, and in particular to an exchangeable pressure sleeve which can be applied to an adjustable pressure roller.
  • the known web transport devices have a fixed, driven transport roller and at least one narrow, adjustable pressure roller. These narrow, adjustable pressure rollers have a disadvantageous effect in folders.
  • the width of a strand of a material web can change with each new operation. If this is the case, the narrow pressure rollers must be adjusted so that they contact both edges of a strand. This means that bolts have to be loosened, with which the pressure rollers are fastened on an axis, and rings, with which each pressure roller is connected, are moved into the correct position and then the bolts have to be tightened again.
  • the pressure rollers do not have to operate with a high pressure force, they tend to separate from the fixed, driven transport roller with each vibration-related impact. This leads to phase voltage differences.
  • the contact force of the rollers was increased, but not the pressure force generated by the pressure rollers, since a mechanical lock was installed that determined the gap between the rollers.
  • this mechanical lock is cumbersome and time-consuming and normally has to be carried out for each new operation.
  • British Patent No. 1,457,989 discloses a bearing mounted carrier which is moved by two cylinders to which a pressure medium is supplied via a conventional pressure line. The force of the pressure can be selected via a control. A connection of the individual chambers of the cylinders to one another causes a displacement of the volume of liquid from one chamber to the other as a result of volume fluctuations, as a result of which the position of a lever attached to one side is stabilized and the web tension is accordingly kept constant.
  • the U.S. U.S. Patent No. 3,083,887 discloses a device having a cylinder to which a pressure medium is supplied, thereby bending a lever attached to one side to thereby respectively increase or decrease the belt tension of a drive via a roller.
  • One solution to these problems has been to provide an activating device for applying a variable, full-width pressure roller to a fixed, driven transport roller in order to act on it.
  • Such a device pulls essentially wrinkle-free webs, which can consist of several web strands, with a constant web tension through a folder. This enables the formation of an accurate longitudinal fold in the gap between the adjustable, full-width pressure roller and the transport roller.
  • a damping device which acts simultaneously with the activation device on the full-width pressure roller, stabilizes the position of this adjustable pressure roller and prevents or limits the build-up of vibrations.
  • a belt conveyor has become known from EP 0 205 700 A1.
  • the contact pressure between the surfaces of two rollers is applied by packets of disc springs which act on the bearing points of the upper rollers and thus press the surface of the upper roller against that of the lower roller.
  • DE 40 38 219 A1 discloses a roller for the transport of sheet and sheet material, the surface of which alternately has corrugated metal strips and elastic ring coverings which protrude slightly.
  • a polished metallic Grooves are incorporated into the core roller.
  • a formable, later curing, optionally adhesive material is applied in a certain layer thickness.
  • An elastic ring covering with recesses is pre-tensioned and pulled over the roller body. It snaps into the grooves, the malleable material being pressed into the recess in the ring covering and forming a positive connection here after hardening.
  • This positive connection makes it possible to pull the ring coverings onto the roller base body without tension or with only a small amount of tension and thus to avoid cracking, marking and bursting of the elastic ring coverings during the subsequent regrinding process or during the production of folding products.
  • An advantage of the present invention is that in this device the worn pressure sleeve can be removed and replaced with a new one. This eliminates the need to overhaul worn or damaged pressure rollers.
  • the interchangeable compression sleeve of the present invention also includes a compressible layer of material. This compressible area increases the shock absorbing ability, improves tension uniformity.
  • the interchangeable pressure sleeve of the present invention has at least one annular gap along its longitudinal axis.
  • This annular gap has the advantage that the material web can curl without permanent creases or creases.
  • the present invention also provides a device which serves as a counterweight or balance for the pressure roller while it is in a maintenance position when the removable pressure sleeve is replaced.
  • This has the advantage that the interchangeable pressure sleeve can be axially removed from one side of the adjustable pressure roller or can be applied to it without the pressure roller having to be completely removed from the printing press.
  • the web transport device shown in Fig. 1 comprises a rotatable, driven transport roller 10 which is mounted in a support bearing attached to a frame of a printing press or a folder. Opposite the driven transport roller 10 is an adjustable pressure roller 12 with an interchangeable pressure sleeve 14 mounted thereon, which is brought into contact with the driven transport roller 10.
  • the adjustable pressure roller 12 is of full width, i. H. that it has a width corresponding to the maximum width of a material web that can be processed in the printing press.
  • a material web 16 shown in FIG. 2 consists of at least one strand and is located between the driven transport roller 10 and the adjustable pressure roller 12.
  • the adjustable pressure roller 12 is set by arms 18 and 20.
  • the arms 18 and 20 comprise an activation device 22, which has a control 24 connected to it, and a damping element 26, which has a control 28 connected to it, as shown schematically in FIG. 2.
  • the activating device 22 assigns a precisely metered activating or positioning force, while the build-up of vibrations by the damping element 26, which is connected either in parallel or in series with the activating device 22, is prevented.
  • the activation device 22 can be preset by the Control 24 take place, and a change in the damping property of the damping element 26 can be done by the controller 28.
  • the pressure sleeve is hollow and tubular, it is fixedly connected to the adjustable pressure roller 12 and rotates with it under the influence of the driven transport roller 10. However, the pressure sleeve 14 can be removed from the adjustable pressure roller 12 and replaced, as explained below.
  • the pressure sleeve 14 can be constructed in a variety of ways. In the embodiment of the present invention shown here, the pressure sleeve 14 consists of a laminate. Thus, the pressure sleeve 14 comprises a cylindrical outer layer 30, which has a smooth, continuous outer surface 32, as shown in FIG. 3.
  • the cylindrical outer layer 30 preferably consists of a very thin, non-compressible material of medium hardness, such as natural rubber or synthetic rubber.
  • the smooth outer surface 32 of the pressure sleeve 14 has no gaps or seams, except for one or more annular gaps 36 formed along the axial length of the pressure sleeve, as shown in FIGS. 1 and 2.
  • the smooth outer surface 32 enables the contactable pressure roller 12 to make reliable contact with the web material 16.
  • annular gaps 36 allow the web material 16 to curl without permanent creases or creases.
  • the number and the widths of the annular gaps can vary depending on the width and thickness of the web material strands moving through the web transport device.
  • a cylindrical intermediate layer 38 is, seen in the radial direction, within the outer layer 30 of the Pressure sleeve 14 arranged as shown in Fig. 3.
  • the intermediate layer 38 has a cylindrical outer surface 40 which is fixedly attached to the cylindrical inner surface 42 of the outer layer 30.
  • the cylindrical intermediate layer 38 consists of a reinforced, elastic, compressible material, e.g. B. from at least one layer of cottonine treated with a polymeric foam rubber. With this compressible material layer, all impacts occurring when the web material runs through the web transport device are absorbed by the pressure sleeve 14.
  • the intermediate layer 38 of the pressure sleeve 14 is fastened to a hollow, elastically expandable, rigid, metal (or plastic) inner layer 44, which has a thin-walled tube 46, and the thin-walled tube 46 is in turn firmly connected to the adjustable pressure roller 12.
  • a cylindrical inner surface 48 of the tube 46 is in contact with a cylindrical outer surface 50 of the adjustable pressure roller 12.
  • the tube 46 is fixed but releasably connected to the adjustable pressure roller 12, so that the complete pressure sleeve 14 can be axially applied to and / or removed from the adjustable pressure roller with a sliding movement. This construction enables the pressure sleeve 14 to be replaced after a period of use.
  • the pressure sleeve 14 described here has an inner layer 44, an outer layer 30 and an intermediate layer 38, this could also have a smaller or larger number of layers, if desired.
  • the pressure sleeve 14 could, for example, have an additional layer made of the same material as that of the outer layer 30, which, seen in the radial direction, is arranged inside the intermediate layer 38 and, seen in the radial direction, outside the inner layer 44.
  • the pressure sleeve 14 and the adjustable pressure roller 12 have a tight fit metal-on-metal or (plastic-on-metal) between the cylindrical metal (or plastic) tube 46 on the inside of the pressure sleeve 14 and the outer surface of the metal adjustable pressure roller 12. This results in a constant diameter from the inner surface 48 of the cylindrical tube 46, which is slightly smaller than the constant diameter from the cylindrical outer surface 50 of the adjustable pressure roller 12.
  • the tight fit between the tube 46 and the adjustable pressure roller 12 must be strong enough so that the pressure sleeve 14 can grip firmly on the lateral surface of the adjustable pressure roller 12 during operation of the printing press or the folder, so that no slip occurs between the pressure sleeve 14 and the adjustable pressure roller 12.
  • the tube 46 is tensioned by the adjustable pressure roller 12 to establish a tight pressure ratio between the pressure sleeve 14 and the adjustable pressure roller 12. This pressure ratio tensions the pressure sleeve 14 on the adjustable pressure roller 12, so that there is no relative movement between them during operation of the printing press or the folder.
  • the press or folder includes means for radially stretching the tube 46 on the adjustable pressure roller 12 to release the pressure relationship between the pressure sleeve 14 and the adjustable pressure roller 12, as described below. When the pressure ratio is released, the pressure sleeve 14 can be manually axially removed from the pressure roller 12.
  • the tube 46 must also be radially stretched or radially stretched in order to apply the pressure sleeve 14 to the adjustable pressure roller 12.
  • the printing press or folder is equipped with a device for performing this function equipped as explained below.
  • the activation device 22 moves the adjustable pressure roller 12 into a maintenance position, as shown in FIG. 4. In this position, the pressure sleeve 14 can be axially removed from the adjustable pressure roller 12 and replaced with a new pressure sleeve, which is then axially applied to the adjustable pressure roller by a sliding movement.
  • a support bearing 52 Before the pressure sleeve 14 can be removed from the adjustable pressure roller 12, a support bearing 52 must be removed. This is done by removing two bolts 54 and by pivoting the support bearing 52 away, as shown in FIG. 5. However, before the support bearing 52 can be pivoted away, the arm 18 must be released from the support bearing 52. In the pivoted-down position, the support bearing 52 is held by a releasable spring bolt mounted in a sleeve (not shown). When the support bearing 52 is removed, there is no support for the adjustable pressure roller 12 on the side of the support bearing 52 in the printing press or in the folder. In order that the pressure roller 12 does not fall onto the floor of the printing press or the folder, the present invention provides a counterweight mechanism 56. This counterweight mechanism 56 is preferably located at the end of the pressure roller 12 opposite the support bearing 52 and holds a journal 58 of the pressure roller 12 in place, as shown in FIG. 5.
  • the counterweight mechanism 56 has an articulated arm 60 which is attached at one end to a caliber-like part 62 and at the other end to a lifting part 64.
  • the Caliber-like part 62 is designed so that it fits over the journal 58 and assumes a securing position.
  • the lifting part 64 is in turn connected to a pivoting part 66 which rotates about a fixed point 68 in the printing press or in the folder.
  • the pivot part 66 is in turn with an activating device 70, for. B. an air cylinder, pneumatic cylinder, hydraulic cylinder or the like, connected.
  • the activating device 70 moves the articulated arm 60 via the swivel part 66 and the lifting part 64 until the caliber-like part 62 is firmly seated on the journal 58 of the adjustable pressure roller 12.
  • the activation device 70 brings the pivoting part 66 into a tilted position, as a result of which the counterweight mechanism 56 locks in its position and thus prevents the adjustable pressure roller 12 from falling.
  • An alternative method of removing the pressure sleeve 14 from the adjustable pressure roller 12 would be to remove the roller 12 completely from the press or folder by means of a crane, and then to replace the pressure sleeve 14 outside the machine. Although this would be an acceptable method for replacing the pressure sleeve, the previously described method is preferable because no heavy pressure roller that can be adjusted has to be removed and less machine downtime is associated therewith.
  • the pressure roller 12 In order to manually remove the pressure sleeve 14 from the adjustable roller 12, the pressure sleeve must be elastically stretched by liquid pressure. Therefore, the pressure roller 12 is provided with openings 72 extending in the radial direction, as shown in FIG. 3.
  • openings 72 are spaced from one another at many locations in the radial direction along the length of the adjustable pressure roller 12.
  • the adjustable pressure roller 12 is hollow and is connected by a pipe 74 to a source of hydraulic fluid or compressed air, as shown in FIGS. 1 and 4.
  • the compressed air passed through the pipeline 74 into the interior of the adjustable pressure roller 12 flows through the openings 72 and presses against the inner surface 48 of the tube 46.
  • the tube 46 is elastically stretched to an extent by the compressed air, so that it is possible to manually remove the pressure sleeve 14 from the pressure roller 12 with ease.
  • a new pressure sleeve 14 is manually applied to the adjustable pressure roller 12. After the pressure sleeve 14 has been placed axially on the pressure roller 12, the interior of the roller 12 is connected to the atmosphere. The tube 46 of the new pressure sleeve 14 then shrinks so that it sits securely on the outer surface 50 of the adjustable pressure roller 12. The tube 46 is then held in tension by the pressure roller 12.
  • the amount of air pressure required for the elastic expansion of tube 46 may vary depending on the radial thickness of the tube, the type of material of the tube, and the interference between tube and pressure roller 12.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Transportieren von Materialbahnen in einer Rotationsdruckmaschine oder in einem Falzapparat, und im besonderen eine auswechselbare Andrückhülse, die auf eine anstellbare Andrückwalze aufgebracht werden kann.The present invention relates to a device for transporting material webs in a rotary printing press or in a folder, and in particular to an exchangeable pressure sleeve which can be applied to an adjustable pressure roller.

Die bekannten Bahntransportvorrichtungen haben eine festgelagerte, getriebene Transportwalze und mindestens eine schmale, anstellbare Andrückwalze. Diese schmalen, anstellbaren Andrückwalzen wirken sich in Falzapparaten nachteilig aus. Mit jedem neuen Arbeitsgang kann sich die Breite eines Stranges einer Materialbahn ändern. Ist dies der Fall, so müssen die schmalen Andrückwalzen verstellt werden, so daß diese beide Kanten eines Stranges kontaktieren. Dies bedeutet, daß Bolzen gelöst werden müssen, womit die Andrückwalzen auf einer Achse befestigt werden, und Ringe, mit welchen jede Andrückwalze verbunden ist, in die korrekte Position bewegt und dann die Bolzen wieder festgeschraubt werden müssen. Diese Handlungen sind zeitraubend und haben beträchtliche Maschinenstillstandzelten zur Folge.The known web transport devices have a fixed, driven transport roller and at least one narrow, adjustable pressure roller. These narrow, adjustable pressure rollers have a disadvantageous effect in folders. The width of a strand of a material web can change with each new operation. If this is the case, the narrow pressure rollers must be adjusted so that they contact both edges of a strand. This means that bolts have to be loosened, with which the pressure rollers are fastened on an axis, and rings, with which each pressure roller is connected, are moved into the correct position and then the bolts have to be tightened again. These actions are time consuming and result in significant machine downtime tents.

Da ferner die Andrückwalzen nicht mit hoher Andrückkraft zu operieren brauchen, neigen sie dazu, sich bei jedem schwingungsbedingten Schlag von der festgelagerten, getriebenen Transportwalze zu trennen. Dies führt zu Strangspannungsunterschieden. Früher wurde die Anstellkraft der Walzen erhöht, aber nicht die von den Andrückwalzen erzeugte Andrückkraft, da eine mechanische Sperre angebracht wurde, die den Spalt zwischen den Walzen bestimmte. Das Anbringen dieser mechanischen Sperre ist jedoch hinderlich und zeitraubend und muß normalerweise für jeden neuen Arbeitsgang erfolgen.Furthermore, since the pressure rollers do not have to operate with a high pressure force, they tend to separate from the fixed, driven transport roller with each vibration-related impact. This leads to phase voltage differences. In the past, the contact force of the rollers was increased, but not the pressure force generated by the pressure rollers, since a mechanical lock was installed that determined the gap between the rollers. However, the application of this mechanical lock is cumbersome and time-consuming and normally has to be carried out for each new operation.

Es wurden verschiedene Versuche unternommen, dieses Problem zu beseitigen. Das Britische Patent Nr. 1,457,989 und das U.S. Patent Nr. 3,083,887 offenbaren Bahntransportvorrichtungen, welche auf das Steuern der Spannung der Materialbahn während deren Lauf durch die Bahntransportvorrichtung gerichtet sind.Various attempts have been made to overcome this problem. British Patent No. 1,457,989 and U.S. U.S. Patent No. 3,083,887 disclose web transport devices which are directed to controlling the tension of the web of material as it passes through the web transport device.

Das Britische Patent Nr. 1,457,989 offenbart einen auf Lager montierten Träger, der von zwei Zylindern bewegt wird, denen über eine herkömmliche Druckleitung ein Druckmedium zugeführt wird. Die Kraft des Drucks ist über eine Steuerung wählbar. Eine Verbindung der individuellen Kammern der Zylinder untereinander bewirkt eine Verlagerung von Flüssigkeitsvolumen von einer Kammer zur anderen infolge auftretender Volumenschwankungen, wodurch die Position eines an einer Seite angebrachten Hebels stabilisiert und die Bahnspannung entsprechend konstant gehalten wird.British Patent No. 1,457,989 discloses a bearing mounted carrier which is moved by two cylinders to which a pressure medium is supplied via a conventional pressure line. The force of the pressure can be selected via a control. A connection of the individual chambers of the cylinders to one another causes a displacement of the volume of liquid from one chamber to the other as a result of volume fluctuations, as a result of which the position of a lever attached to one side is stabilized and the web tension is accordingly kept constant.

Das U.S. Patent Nr. 3,083,887 offenbart eine Vorrichtung mit einem Zylinder, dem ein Druckmedium zugeführt wird, wodurch ein an einer Seite angebrachter Hebel abgebogen wird, um dadurch die Riemenspannung eines Antriebs über eine Walze jeweils zu erhöhen oder zu reduzieren.The U.S. U.S. Patent No. 3,083,887 discloses a device having a cylinder to which a pressure medium is supplied, thereby bending a lever attached to one side to thereby respectively increase or decrease the belt tension of a drive via a roller.

Diese Lösungen haben den Nachteil, daß sie aufgrund der langen Hebelarme keine variierbare oder meßbare Feinanstellung der Walzen bieten. Andererseits ist durch die jeweilige Verwendung von herkömmlichen Stoßdämpfern und eines Kammerverbundsystems die Dämpffähigkeit drastisch eingeschränkt oder begrenzt.These solutions have the disadvantage that they do not offer variable or measurable fine adjustment of the rollers due to the long lever arms. On the other hand, the damping ability is drastically restricted or limited by the respective use of conventional shock absorbers and a chamber composite system.

Diese Lösungen haben den weiteren Nachteil, daß sie zu viel Spannung in dem Bahnmaterial erzeugen, wodurch dieses knittert oder Falten wirft.These solutions have the further disadvantage that they create too much tension in the web material, causing it to wrinkle or wrinkle.

Eine Lösung zu diesen Problemen bestand darin, eine Aktiviereinrichtung für das Beaufschlagen einer anstellbaren, voll-breiten Andrückwalze mit einer variierbaren Kraft zum Anstellen an eine festgelagerte, getriebene Transportwalze vorzusehen. Solch eine Vorrichtung zieht im wesentlichen faltenfreie Bahnen, die aus mehreren Bahnsträngen bestehen können, unter gleichbleibender Bahnspannung durch einen Falzapparat. Dies ermöglicht die Bildung eines akkuraten Längsfalzes in dem Spalt zwischen der anstellbaren, voll-breiten Andrückwalze und der Transportwalze. Eine Dämpfeinrichtung, die gleichzeitig mit der Aktiviereinrichtung auf die voll-breite Andrückwalze einwirkt, stabilisiert die Lage dieser anstellbaren Andrückwalze und verhindert oder begrenzt den Aufbau von Schwingungen.One solution to these problems has been to provide an activating device for applying a variable, full-width pressure roller to a fixed, driven transport roller in order to act on it. Such a device pulls essentially wrinkle-free webs, which can consist of several web strands, with a constant web tension through a folder. This enables the formation of an accurate longitudinal fold in the gap between the adjustable, full-width pressure roller and the transport roller. A damping device, which acts simultaneously with the activation device on the full-width pressure roller, stabilizes the position of this adjustable pressure roller and prevents or limits the build-up of vibrations.

Obschon diese Lösung die meisten der oben genannten Probleme beseitigt, hat sie doch einige Schwächen. Sei Beschädigung oder Abnutzungserscheinungen muß die ganze Andrückwalze entfernt werden. Da die Walze von voller Breite ist, ist sie schwer und unhandlich, so daß es schwierig und zeitraubend ist, sie Zu entfernen. Bei Abnutzungserscheinungen müssen Andrückwalzen dieses Typs überholt werden, womit beträchtliche Maschinenstillstandzeit verbunden ist.Although this solution eliminates most of the problems mentioned above, it has some weaknesses. In the event of damage or signs of wear, the entire pressure roller must be removed. Because the roller is full width, it is heavy and bulky, making it difficult and time consuming to remove. If there are signs of wear, pressure rollers of this type must be overhauled, which involves considerable machine downtime.

Aus EP 0 205 700 A1 ist ein Bandförderer bekanntgeworden. Bei dieser Vorrichtung zur Förderung eines Stahlbandes wird die Anpreßkraft zwischen den Oberflächen zweier Walzen durch Tellerfedernpakete aufgebracht, die auf die Lagerungsstellen der oberen der Walzen einwirken und somit die Oberfläche der oberen Walze an die der unteren Walze andrücken.A belt conveyor has become known from EP 0 205 700 A1. In this device for conveying a steel strip, the contact pressure between the surfaces of two rollers is applied by packets of disc springs which act on the bearing points of the upper rollers and thus press the surface of the upper roller against that of the lower roller.

DE 40 38 219 A1 offenbart eine Walze für den Transport von bogen- und bahnförmigem Material, deren Oberfläche im Wechsel geriffelte Metallstreifen und elastische Ringbeläge, die geringfügig überstehen aufweist. In eine geschliffene metallische Kernwalze werden Nuten eingearbeitet. Ein formbares, später aushärtendes gegebenenfalls klebendes Material wird in einer bestimmten Schichtdicke aufgetragen. Ein elastischer Ringbelag mit Aussparungen versehen wird vorgespannt und über den Walzengrundkörper gezogen. Er rastet in die Nuten ein, wobei das formbare Material in die Aussparung des Ringbelages gedrückt wird und hier nach Aushärtung eine formschlüssige Verbindung bildet. Diese formschlüssige Verbindung ermöglicht es, die Ringbeläge spannungslos oder mit nur geringer Spannung auf den Walzengrundkörper aufzuziehen und somit Rißbildungen, Markierungen und Platzen der elastischen Ringbeläge während des späteren Nachschleifprozesses bzw. während der Produktion von Falterzeugnissen zu vermeiden.DE 40 38 219 A1 discloses a roller for the transport of sheet and sheet material, the surface of which alternately has corrugated metal strips and elastic ring coverings which protrude slightly. In a polished metallic Grooves are incorporated into the core roller. A formable, later curing, optionally adhesive material is applied in a certain layer thickness. An elastic ring covering with recesses is pre-tensioned and pulled over the roller body. It snaps into the grooves, the malleable material being pressed into the recess in the ring covering and forming a positive connection here after hardening. This positive connection makes it possible to pull the ring coverings onto the roller base body without tension or with only a small amount of tension and thus to avoid cracking, marking and bursting of the elastic ring coverings during the subsequent regrinding process or during the production of folding products.

Es ist eine Aufgabe der vorliegenden Erfindung, eine nahtlose, voll-breite Andrückwalze vorzusehen, die leicht zu handhaben und leicht zu warten ist.It is an object of the present invention to provide a seamless, full-wide nip roller that is easy to handle and easy to maintain.

Es ist eine weitere Aufgabe der vorliegenden Erfindung, eine Bahntransportvorrichtung vorzusehen, bei welcher abgenutzte voll-breite Andrückwalzen nicht mehr überholt zu werden brauchen.It is a further object of the present invention to provide a web transport device in which worn full-width pressure rollers no longer need to be overhauled.

Es ist eine weitere Aufgabe der vorliegenden Erfindung, eine spaltlose, nahtlose Andrückwalze vorzusehen, bei der aufgrund ihrer kontinuierlichen Form die Abnutzung minimiert und die Lebensdauer der Transportfläche verlängert sind.It is a further object of the present invention to provide a gapless, seamless pressure roller which, due to its continuous shape, minimizes wear and extends the service life of the transport surface.

Es ist eine zusätzliche Aufgabe der vorliegenden Erfindung, eine Bahntransportvorrichtung vorzusehen, die in einem Falzapparat verwendbar ist und imstande ist, aus mindestens einem Strang bestehende Materialbahnen faltenfrei durch den Falzapparat zu führen, um darin einen akkuraten Längsfalz zu bilden.It is an additional object of the present invention to provide a web transport device which can be used in a folder and which is capable of leading webs of material consisting of at least one strand through the folder without creases in order to form an accurate longitudinal fold therein.

Die vorliegenden Aufgaben werden durch die Merkmale des Patentanspruches 1 gelöst.The present objects are solved by the features of claim 1.

Ein Vorteil der vorliegenden Erfindung liegt darin, daß in dieser Vorrichtung die abgenutzte Andrückhülse entfernt und durch eine neue ersetzt werden kann. Dadurch erübrigt es sich, abgenutzte oder beschädigte Andrückwalzen überholen zu müssen.An advantage of the present invention is that in this device the worn pressure sleeve can be removed and replaced with a new one. This eliminates the need to overhaul worn or damaged pressure rollers.

Es ist ein weiterer Vorteil der vorliegenden Erfindung, daß sie leicht zu handhaben ist und es ermöglicht, die Andrückhülse problemlos auszuwechseln. Darüberhinaus wird durch die spaltlose, nahtlose Form der Andrückhülse deren Abnutzung wesentlich verringert und die Lebensdauer der Transportfläche verlängert.It is a further advantage of the present invention that it is easy to handle and enables the pressure sleeve to be replaced without problems. In addition, the gapless, seamless shape of the pressure sleeve significantly reduces wear and extends the service life of the transport surface.

Die auswechselbare Andrückhülse der vorliegenden Erfindung umfaßt auch eine zusammendrückbare Materialschicht. Diese zusammendrückbare Fläche erhöht die Stoßdämpfungsfähigkeit verbessert die Gleichmäßigkeit der Spannung.The interchangeable compression sleeve of the present invention also includes a compressible layer of material. This compressible area increases the shock absorbing ability, improves tension uniformity.

Die auswechselbare Andrückhülse der vorliegenden Erfindung weist mindestens einen ringförmigen Spalt entlang ihrer Längsachse auf. Dieser ringförmige Spalt hat den Vorteil, daß die Materialbahn sich kräuseln kann, ohne dauerhafte Falten oder Knitter zu bekommen.The interchangeable pressure sleeve of the present invention has at least one annular gap along its longitudinal axis. This annular gap has the advantage that the material web can curl without permanent creases or creases.

Die vorliegende Erfindung sieht auch eine Einrichtung vor, die als Gegengewicht oder Balance für die Andrückwalze dient, während diese sich beim Auswechseln der entfernbaren Andrückhülse in einer Wartungsposition befindet. Dies hat den Vorteil, daß die auswechselbare Andrückhülse an einer Seite axial von der anstellbaren Andrückwalze heruntergenommen oder auf diese aufgebracht werden kann, ohne daß die Andrückwalze vollständig von der Druckmaschine entfernt werden muß.The present invention also provides a device which serves as a counterweight or balance for the pressure roller while it is in a maintenance position when the removable pressure sleeve is replaced. This has the advantage that the interchangeable pressure sleeve can be axially removed from one side of the adjustable pressure roller or can be applied to it without the pressure roller having to be completely removed from the printing press.

Diese und andere Merkmale und Vorteile der vorliegenden Erfindung werden durch die folgende Beschreibung im Zusammenhang mit den beigefügten, nachstehend erläuterten Zeichnungen weiter verdeutlicht.

Fig. 1
ist eine Draufsicht der erfindungsgemäßen Bahntransportvorrichtung;
Fig. 2
ist eine perspektivische und schematische Darstellung der in Fig. 1 gezeigten Bahntransportvorrichtung;
Fig. 3
ist eine vergrößerte Querschnittansicht eines Teils einer auf der erfindungsgemäßen Andrückwalze angebrachten auswechselbaren Andrückhülse;
Fig. 4
ist eine Draufsicht auf die erfindungsgemäße Bahntransportvorrichtung in einer Wartungsposition.
Fig. 5
ist eine Seitenansicht der Bahntransportvorrichtung in einer Wartungsposition, in welcher bin Stützlager der anstellbaren Andrückwalze entfernt und der erfindungsgemäße Gegengewichtmechanismus in Stellung gebracht ist, um die auswechselbare Andrückhülse erfindungsgemäß entfernen und ersetzen zu können.
These and other features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are explained below.
Fig. 1
is a plan view of the web transport device according to the invention;
Fig. 2
Fig. 3 is a perspective and schematic illustration of the web transport device shown in Fig. 1;
Fig. 3
Fig. 3 is an enlarged cross-sectional view of a portion of an interchangeable press sleeve mounted on the press roller of the present invention;
Fig. 4
is a plan view of the web transport device according to the invention in a maintenance position.
Fig. 5
is a side view of the web transport device in a maintenance position in which a support bearing of the adjustable pressure roller is removed and the counterweight mechanism according to the invention is in position in order to be able to remove and replace the replaceable pressure sleeve according to the invention.

Die in Fig. 1 gezeigte Bahntransportvorrichtung umfaßt eine rotierbare, getriebene Transportwalze 10, die in einem an einem Rahmen einer Druckmaschine oder eines Falzapparats befestigten Stützlager gelagert ist. Gegenüber der angetriebenen Transportwalze 10 befindet sich eine anstellbare Andrückwalze 12 mit einer darauf angebrachten, auswechselbaren Andrückhülse 14, die mit der angetriebenen Transportwalze 10 in Kontakt gebracht wird. Die anstellbare Andrückwalze 12 ist von voller Breite, d. h. daß sie eine der maximalen Breite einer in der Druckmaschine verarbeitbaren Materialbahn entsprechende Breite hat. Eine in Fig. 2 gezeigte Materialbahn 16 besteht aus mindestens einem Strang und befindet sich zwischen der getriebenen Transportwalze 10 und der anstellbaren Andrückwalze 12.The web transport device shown in Fig. 1 comprises a rotatable, driven transport roller 10 which is mounted in a support bearing attached to a frame of a printing press or a folder. Opposite the driven transport roller 10 is an adjustable pressure roller 12 with an interchangeable pressure sleeve 14 mounted thereon, which is brought into contact with the driven transport roller 10. The adjustable pressure roller 12 is of full width, i. H. that it has a width corresponding to the maximum width of a material web that can be processed in the printing press. A material web 16 shown in FIG. 2 consists of at least one strand and is located between the driven transport roller 10 and the adjustable pressure roller 12.

Die anstellbare Andrückwalze 12 wird durch Arme 18 und 20 angestellt. Die Arme 18 und 20 umfassen eine Aktiviereinrichtung 22, die eine damit verbundene Steuerung 24 aufweist, und ein Dämpfungselement 26, das einen damit verbundenen Regler 28 aufweist, wie schematisch in Fig. 2 gezeigt. Es wird von der Aktiviereinrichtung 22 eine genau dosierte Aktivier- oder Anstellkraft zugeteilt, während ein Aufbau von Schwingungen durch das Dämpfungselement 26, das entweder parallel oder seriell mit der Aktiviereinrichtung 22 verbunden ist, verhindert wird. Eine Voreinstellung der Aktiviereinrichtung 22 kann durch die Steuerung 24 erfolgen, und eine Änderung der Dämpfungseigenschaft des Dämpfungselements 26 kann durch den Regler 28 erfolgen.The adjustable pressure roller 12 is set by arms 18 and 20. The arms 18 and 20 comprise an activation device 22, which has a control 24 connected to it, and a damping element 26, which has a control 28 connected to it, as shown schematically in FIG. 2. The activating device 22 assigns a precisely metered activating or positioning force, while the build-up of vibrations by the damping element 26, which is connected either in parallel or in series with the activating device 22, is prevented. The activation device 22 can be preset by the Control 24 take place, and a change in the damping property of the damping element 26 can be done by the controller 28.

Die Andrückhülse ist hohl und rohrförmig, sie ist fest mit der anstellbaren Andrückwalze 12 verbunden und rotiert mit dieser unter dem Einfluß der getriebenen Transportwalze 10. Jedoch kann die Andrückhülse 14 von der anstellbaren Andrückwalze 12 entfernt und ersetzt werden, wie im folgenden erläutert.The pressure sleeve is hollow and tubular, it is fixedly connected to the adjustable pressure roller 12 and rotates with it under the influence of the driven transport roller 10. However, the pressure sleeve 14 can be removed from the adjustable pressure roller 12 and replaced, as explained below.

Die Andrückhülse 14 kann auf mannigfaltige Weise konstruiert sein. In der hier dargestellten Ausführung der vorliegenden Erfindung besteht die Andrückhülse 14 aus einem Laminat. Somit umfaßt die Andrückhülse 14 eine zylindrische Außenschicht 30, die eine glatte, kontinuierliche Mantelfläche 32 aufweist, wie in Fig. 3 gezeigt. Die zylindrische Außenschicht 30 besteht vorzugsweise aus einem sehr dünnen, nicht zusammendrückbaren Material mittleren Härtegrades, wie Naturkautschuk oder synthetischer Kautschuk. Die glatte Mantelfläche 32 der Andrückhülse 14 hat keine Spalte oder Nähte, außer einem oder mehreren entlang der Achslänge der Andrückhülse geformten ringfömigen Spalten 36, wie in den Fig. 1 und 2 gezeigt. Die glatte Mantelfläche 32 ermöglicht einen sicheren Kontakt der anstellbaren Andrückwalze 12 mit dem Bahnmaterial 16. Diese Mantelfläche 32 erhöht beträchtlich die Genauigkeit, mit welcher der Falz gebildet wird. Die ringförmigen Spalte 36 erlauben ein Kräuseln des Bahnmaterials 16, ohne daß dauerhafte Falten oder Knitter entstehen. Die Anzahl und die Breiten der ringförmigen Spalte können je nach Breite und Dicke der sich durch die Bahntransportvorrichtung bewegenden Bahnmaterialstränge variieren.The pressure sleeve 14 can be constructed in a variety of ways. In the embodiment of the present invention shown here, the pressure sleeve 14 consists of a laminate. Thus, the pressure sleeve 14 comprises a cylindrical outer layer 30, which has a smooth, continuous outer surface 32, as shown in FIG. 3. The cylindrical outer layer 30 preferably consists of a very thin, non-compressible material of medium hardness, such as natural rubber or synthetic rubber. The smooth outer surface 32 of the pressure sleeve 14 has no gaps or seams, except for one or more annular gaps 36 formed along the axial length of the pressure sleeve, as shown in FIGS. 1 and 2. The smooth outer surface 32 enables the contactable pressure roller 12 to make reliable contact with the web material 16. This outer surface 32 considerably increases the accuracy with which the fold is formed. The annular gaps 36 allow the web material 16 to curl without permanent creases or creases. The number and the widths of the annular gaps can vary depending on the width and thickness of the web material strands moving through the web transport device.

Eine zylindrische Zwischenschicht 38 ist, in radialer Richtung gesehen, innerhalb der Außenschicht 30 der Andrückhülse 14 angeordnet, wie in Fig. 3 gezeigt. Die Zwischenschicht 38 hat eine zylindrische Außenfläche 40, die auf der zylindrischen Innenfläche 42 der Außenschicht 30 fest angebracht ist. In einer bevorzugten Ausführung der Erfindung besteht die zylindrische Zwischenschicht 38 aus einem verstärkten elastischen, zusammendrückbaren Material, z. B. aus mindestens einer Schicht von mit einem polymerischen Schaumgummi behandelter Baumwolleine. Mit dieser zusammendrückbaren Materialschicht werden alle beim Lauf des Bahnmaterials durch die Bahntransportvorrichtung auftretenden Stöße von der Andrückhülse 14 absorbiert.A cylindrical intermediate layer 38 is, seen in the radial direction, within the outer layer 30 of the Pressure sleeve 14 arranged as shown in Fig. 3. The intermediate layer 38 has a cylindrical outer surface 40 which is fixedly attached to the cylindrical inner surface 42 of the outer layer 30. In a preferred embodiment of the invention, the cylindrical intermediate layer 38 consists of a reinforced, elastic, compressible material, e.g. B. from at least one layer of cottonine treated with a polymeric foam rubber. With this compressible material layer, all impacts occurring when the web material runs through the web transport device are absorbed by the pressure sleeve 14.

Die Zwischenschicht 38 der Andrückhülse 14 ist auf einer hohlen, elastisch ausdehnbaren, starren, metallenen (oder Kunststoff)-Innenschicht 44, die eine dünnwandige Röhre 46 aufweist, befestigt, und die dünnwandige Röhre 46 ist wiederum fest mit der anstellbaren Andrückwalze 12 verbunden. Eine zylindrische Innenfläche 48 der Röhre 46 ist mit einer zylindrischen Außenfläche 50 der anstellbaren Andrückwalze 12 in Kontakt. Die Röhre 46 ist fest, jedoch lösbar mit der anstellbaren Andrückwalze 12 verbunden, so daß die vollständige Andrückhülse 14 mit einer Schiebebewegung axial auf die anstellbare Andrückwalze aufgebracht und/oder von dieser heruntergenommen werden kann. Diese Konstruktion ermöglicht das Auswechseln der Andrückhülse 14 nach einer Zeit des Gebrauchs.The intermediate layer 38 of the pressure sleeve 14 is fastened to a hollow, elastically expandable, rigid, metal (or plastic) inner layer 44, which has a thin-walled tube 46, and the thin-walled tube 46 is in turn firmly connected to the adjustable pressure roller 12. A cylindrical inner surface 48 of the tube 46 is in contact with a cylindrical outer surface 50 of the adjustable pressure roller 12. The tube 46 is fixed but releasably connected to the adjustable pressure roller 12, so that the complete pressure sleeve 14 can be axially applied to and / or removed from the adjustable pressure roller with a sliding movement. This construction enables the pressure sleeve 14 to be replaced after a period of use.

Obschon die hier beschriebene Andrückhülse 14 eine Innenschicht 44, eine Außenschicht 30 und eine Zwischenschicht 38 aufweist, könnte diese auch eine kleinere oder größere Anzahl Schichten haben, falls gewünscht. Die Andrückhülse 14 könnte z.B. eine zusätzliche Schicht aus demselben Material wie dem der Außenschicht 30 haben, die, in radialer Richtung gesehen, innerhalb der Zwischenschicht 38 und, in radialer Richtung gesehen, außerhalb der Innenschicht 44 angeordnet ist.Although the pressure sleeve 14 described here has an inner layer 44, an outer layer 30 and an intermediate layer 38, this could also have a smaller or larger number of layers, if desired. The pressure sleeve 14 could, for example, have an additional layer made of the same material as that of the outer layer 30, which, seen in the radial direction, is arranged inside the intermediate layer 38 and, seen in the radial direction, outside the inner layer 44.

Die Andrückhülse 14 und die anstellbare Andrückwalze 12 haben einen Festsitz Metall-auf-Metall oder (Kunststoff-auf-Metall) zwischen der zylindrischen metallenen (oder Kunststoff-) Röhre 46 an der Innenseite der Andrückhülse 14 und der Mantelfläche der metallenen anstellbaren Andrückwalze 12. Somit ergibt sich von der Innenfläche 48 der zylindrischen Röhre 46 ein gleichbleibender Durchmesser, der geringfügig kleiner ist als der gleichbleibende Durchmesser von der zylindrischen Außenfläche 50 der anstellbaren Andrückwalze 12. Der Festsitz zwischen der Röhre 46 und der anstellbaren Andrückwalze 12 muß stark genug sein, damit die Andrückhülse 14 auf der Mantelfläche der anstellbaren Andrückwalze 12 beim Betrieb der Druckmaschine oder des Falzapparats fest greifen kann, so daß zwischen der Andrückhülse 14 und der anstellbaren Andrückwalze 12 kein Schlupf entsteht.The pressure sleeve 14 and the adjustable pressure roller 12 have a tight fit metal-on-metal or (plastic-on-metal) between the cylindrical metal (or plastic) tube 46 on the inside of the pressure sleeve 14 and the outer surface of the metal adjustable pressure roller 12. This results in a constant diameter from the inner surface 48 of the cylindrical tube 46, which is slightly smaller than the constant diameter from the cylindrical outer surface 50 of the adjustable pressure roller 12. The tight fit between the tube 46 and the adjustable pressure roller 12 must be strong enough so that the pressure sleeve 14 can grip firmly on the lateral surface of the adjustable pressure roller 12 during operation of the printing press or the folder, so that no slip occurs between the pressure sleeve 14 and the adjustable pressure roller 12.

Die Röhre 46 wird von der anstellbaren Andrückwalze 12 gespannt, um ein strammes Andrückverhältnis zwischen der Andrückhülse 14 und der anstellbaren Andrückwalze 12 herzustellen. Dieses Andrückverhältnis spannt die Andrückhülse 14 auf der anstellbaren Andrückwalze 12, so daß beim Betrieb der Druckmaschine oder des Falzapparats keine Relativbewegung dazwischen stattfindet. Die Druckmaschine oder der Falzapparat umfaßt eine Einrichtung, die eine radiale Dehnung der Röhre 46 auf der anstellbaren Andrückwalze 12 bewirkt, um das Andrückverhältnis zwischen der Andrückhülse 14 und der anstellbaren Andrückwalze 12 zu lösen, wie im folgenden beschrieben. Wenn das Andrückverhältnis gelöst ist, kann die Andrückhülse 14 manuell axial von der Andrückwalze 12 entfernt werden. Es muß die Röhre 46 auch radial gedehnt oder radial gespannt werden, um die Andrückhülse 14 auf die anstellbare Andrückwalze 12 aufzubringen. Die Druckmaschine oder der Falzapparat ist mit einer Einrichtung zur Ausführung dieser Funktion ausgestattet, wie nachstehend erläutert.The tube 46 is tensioned by the adjustable pressure roller 12 to establish a tight pressure ratio between the pressure sleeve 14 and the adjustable pressure roller 12. This pressure ratio tensions the pressure sleeve 14 on the adjustable pressure roller 12, so that there is no relative movement between them during operation of the printing press or the folder. The press or folder includes means for radially stretching the tube 46 on the adjustable pressure roller 12 to release the pressure relationship between the pressure sleeve 14 and the adjustable pressure roller 12, as described below. When the pressure ratio is released, the pressure sleeve 14 can be manually axially removed from the pressure roller 12. The tube 46 must also be radially stretched or radially stretched in order to apply the pressure sleeve 14 to the adjustable pressure roller 12. The printing press or folder is equipped with a device for performing this function equipped as explained below.

Wenn es gewünscht ist, die Andrückhülse 14 von der anstellbaren Andrückwalze 12 zu entfernen und diese mit einer anderen Andrückhülse 14 zu ersetzen, bewegt die Aktiviereinrichtung 22 die anstellbare Andrückwalze 12 in eine Wartungsposition, wie in Fig. 4 gezeigt. In dieser Position kann die Andrückhülse 14 axial von der anstellbaren Andrückwalze 12 heruntergenommen und mit einer neuen Andrückhülse, die dann durch eine Schiebebewegung axial auf die anstellbare Andrückwalze aufgebracht wird, ersetzt werden.If it is desired to remove the pressure sleeve 14 from the adjustable pressure roller 12 and to replace it with another pressure sleeve 14, the activation device 22 moves the adjustable pressure roller 12 into a maintenance position, as shown in FIG. 4. In this position, the pressure sleeve 14 can be axially removed from the adjustable pressure roller 12 and replaced with a new pressure sleeve, which is then axially applied to the adjustable pressure roller by a sliding movement.

Bevor die Andrückhülse 14 von der anstellbaren Andrückwalze 12 abgenommen werden kann, muß ein Stützlager 52 entfernt werden. Dies geschieht durch das Entfernen zweier Bolzen 54 und indem das Stützlager 52 abgeschwenkt wird, wie in Fig. 5 gezeigt. Jedoch bevor das Stützlager 52 abgeschwenkt werden kann, muß der Arm 18 von dem Stützlager 52 gelöst werden. In der abgeschwenkten Position wird das Stützlager 52 von einem in einer Manschette (nicht gezeigt) gelagerten lösbaren Federbolzen festgehalten. Wenn das Stützlager 52 entfernt ist, gibt es keine Stütze für die anstellbare Andrückwalze 12 an der Seite des Stützlagers 52 in der Druckmaschine oder in dem Falzapparat. Damit die Andrückwalze 12 nicht auf den Boden der Druckmaschine oder des Falzapparats fällt, sieht die vorliegende Erfindung einen Gegengewichtmechanismus 56 vor. Dieser Gegengewichtmechanismus 56 befindet sich vorzugsweise an dem Ende der Andrückwalze 12 gegenüber dem Stützlager 52 und hält einen Achszapfen 58 der Andrückwalze 12 auf seinem Platz, wie in Fig. 5 gezeigt.Before the pressure sleeve 14 can be removed from the adjustable pressure roller 12, a support bearing 52 must be removed. This is done by removing two bolts 54 and by pivoting the support bearing 52 away, as shown in FIG. 5. However, before the support bearing 52 can be pivoted away, the arm 18 must be released from the support bearing 52. In the pivoted-down position, the support bearing 52 is held by a releasable spring bolt mounted in a sleeve (not shown). When the support bearing 52 is removed, there is no support for the adjustable pressure roller 12 on the side of the support bearing 52 in the printing press or in the folder. In order that the pressure roller 12 does not fall onto the floor of the printing press or the folder, the present invention provides a counterweight mechanism 56. This counterweight mechanism 56 is preferably located at the end of the pressure roller 12 opposite the support bearing 52 and holds a journal 58 of the pressure roller 12 in place, as shown in FIG. 5.

Der Gegengewichtmechanismus 56 hat einen Gelenkarm 60, der an dem einen Ende an einem kaliberartigen Teil 62 und an dem anderen Ende an einem Hebeteil 64 befestigt ist. Das kaliberartige Teil 62 ist so ausgeführt, daß es über den Achszapfen 58 paßt und eine Sicherungsposition einnimmt. Das Hebeteil 64 ist wiederum mit einem Schwenkteil 66, das sich um einen Festpunkt 68 in der Druckmaschine oder in dem Falzapparat dreht, verbunden. Das Schwenkteil 66 ist wiederum mit einer Aktiviereinrichtung 70, z. B. einem Luftzylinder, pneumatischen Zylinder, hydraulischen Zylinder o. ä., verbunden. Die Aktiviereinrichtung 70 bewegt den Gelenkarm 60 über das Schwenkteil 66 und das Hebeteil 64, bis das kaliberartige Teil 62 fest auf dem Achszapfen 58 der anstellbaren Andrückwalze 12 sitzt. Dabei bringt die Aktiviereinrichtung 70 das Schwenkteil 66 in eine Kippstellung, wodurch der Gegengewichtmechanismus 56 in seiner Position arretiert und somit verhindert wird, daß die anstellbare Andrückwalze 12 abstürzt.The counterweight mechanism 56 has an articulated arm 60 which is attached at one end to a caliber-like part 62 and at the other end to a lifting part 64. The Caliber-like part 62 is designed so that it fits over the journal 58 and assumes a securing position. The lifting part 64 is in turn connected to a pivoting part 66 which rotates about a fixed point 68 in the printing press or in the folder. The pivot part 66 is in turn with an activating device 70, for. B. an air cylinder, pneumatic cylinder, hydraulic cylinder or the like, connected. The activating device 70 moves the articulated arm 60 via the swivel part 66 and the lifting part 64 until the caliber-like part 62 is firmly seated on the journal 58 of the adjustable pressure roller 12. The activation device 70 brings the pivoting part 66 into a tilted position, as a result of which the counterweight mechanism 56 locks in its position and thus prevents the adjustable pressure roller 12 from falling.

Wenn der Gegengewichtmechanismus 56 in Position gebracht und das Stützlager 52 abgeschwenkt ist, kann die Andrückhülse 14 von der Andrückwalze 12 entfernt werden.When the counterweight mechanism 56 is positioned and the support bearing 52 is pivoted, the pressure sleeve 14 can be removed from the pressure roller 12.

Ein alternatives Verfahren der Entfernung der Andrückhülse 14 von der anstellbaren Andrückwalze 12 würde das vollständige Entfernen der Walze 12 aus der Druckmaschine oder dem Falzapparat mittels eines Krans sein, um dann die Andrückhülse 14 außerhalb der Maschine auszuwechseln. Obschon dies ein akzeptables Verfahren für das Auswechseln der Andrückhülse wäre, ist das vorher beschriebene Verfahren zu bevorzugen, da keine schwere anstellbare Andrückwalze entfernt werden muß und damit weniger Maschinenstillstandzeit verbunden ist.An alternative method of removing the pressure sleeve 14 from the adjustable pressure roller 12 would be to remove the roller 12 completely from the press or folder by means of a crane, and then to replace the pressure sleeve 14 outside the machine. Although this would be an acceptable method for replacing the pressure sleeve, the previously described method is preferable because no heavy pressure roller that can be adjusted has to be removed and less machine downtime is associated therewith.

Um die Andrückhülse 14 manuell von der anstellbaren Anstellwalze 12 zu entfernen, muß die Andrückhülse durch Flüssigkeitsdruck elastisch gedehnt werden. Deshalb ist die Andrückwalze 12 mit in radialer Richtung sich erstreckenden öffnungen 72 versehen, wie in Fig. 3 gezeigt.In order to manually remove the pressure sleeve 14 from the adjustable roller 12, the pressure sleeve must be elastically stretched by liquid pressure. Therefore, the pressure roller 12 is provided with openings 72 extending in the radial direction, as shown in FIG. 3.

Diese öffnungen 72 befinden sich in einem Abstand voneinander an vielen Stellen in radialer Richtung entlang der Länge der anstellbaren Andrückwalze 12.These openings 72 are spaced from one another at many locations in the radial direction along the length of the adjustable pressure roller 12.

Die anstellbare Andrückwalze 12 ist hohl und durch eine Rohrleitung 74 mit einer Druckflüssigkeits- oder Druckluftquelle verbunden, wie in den Fig. 1 und 4 gezeigt. Die durch die Rohrleitung 74 in das Innere der anstellbaren Andrückwalze 12 geleitete Druckluft fließt durch die öffnungen 72 nach außen und drückt gegen die Innenfläche 48 der Röhre 46. Durch die Druckluft wird die Röhre 46 umfänglich in einem Maße elastisch gedehnt, so daß es möglich ist, die Andrückhülse 14 ohne Mühe manuell von der Andrückwalze 12 herunterzunehmen.The adjustable pressure roller 12 is hollow and is connected by a pipe 74 to a source of hydraulic fluid or compressed air, as shown in FIGS. 1 and 4. The compressed air passed through the pipeline 74 into the interior of the adjustable pressure roller 12 flows through the openings 72 and presses against the inner surface 48 of the tube 46. The tube 46 is elastically stretched to an extent by the compressed air, so that it is possible to manually remove the pressure sleeve 14 from the pressure roller 12 with ease.

In gleicher Weise wird eine neue Andrückhülse 14 manuell auf die anstellbare Andrückwalze 12 aufgebracht. Nach des axialen Plazieren der Andrückhülse 14 auf die Andrückwalze 12 wird das Innere der Walze 12 mit der Atmosphäre verbunden. Die Röhre 46 der neuen Andrückhülse 14 schrumpft dann, so daß sie sicher auf der Außenfläche 50 der anstellbaren Andrückwalze 12 sitzt. Die Röhre 46 wird dann von der Andrückwalze 12 in Spannung gehalten. Das Maß des für die elastische Dehnung der Röhre 46 erforderlichen Luftdrucks kann in Abhängigkeit von der radialen Dicke der Röhre, der Art des Materials der Röhre und der Interferenz zwischen Röhre und Andrückwalze 12 variieren.In the same way, a new pressure sleeve 14 is manually applied to the adjustable pressure roller 12. After the pressure sleeve 14 has been placed axially on the pressure roller 12, the interior of the roller 12 is connected to the atmosphere. The tube 46 of the new pressure sleeve 14 then shrinks so that it sits securely on the outer surface 50 of the adjustable pressure roller 12. The tube 46 is then held in tension by the pressure roller 12. The amount of air pressure required for the elastic expansion of tube 46 may vary depending on the radial thickness of the tube, the type of material of the tube, and the interference between tube and pressure roller 12.

Obwohl die Erfindung hier als in einer Bahntransportvorrichtung in Rotationsdruckmaschinen verwirklicht dargestellt und beschrieben worden ist, soll sie nicht als darauf beschränkt gelten, da Modifikationen und strukturelle Änderungen möglich sind, die in den Rahmen des Anwendungsgebietes der Erfindung und des Schutzumfangs der Patentansprüche fallen.Although the invention has been shown and described as being implemented in a web transport device in rotary printing presses, it is not intended to be so limited since modifications and structural changes are possible that fall within the scope of the invention and the scope of the claims.

BezugszeichenlisteReference list

1010th
TransportwalzeTransport roller
1212th
AndrückwalzePressure roller
1414
AndrückhülsePressure sleeve
1616
MaterialbahnMaterial web
1818th
Armpoor
2020th
Armpoor
2222
AktiviereinrichtungActivation device
2424th
Steuerung der Aktiviereinrichtung 22Control of the activation device 22
2626
DämpfungselementDamping element
2828
ReglerRegulator
3030th
Außenschicht der Andrückhülse 14Outer layer of the pressure sleeve 14
3232
Mantelfläche der Außenschicht 30Shell surface of the outer layer 30
3636
ringförmiger Spaltannular gap
3838
Zwischenschicht der Andrückhülse 14Intermediate layer of the pressure sleeve 14
4040
Außenfläche der Zwischenschicht 38Outer surface of the intermediate layer 38
4242
Innenfläche der Außenschicht 30Inner surface of the outer layer 30
4444
Innenschicht der Andrückhülse 14Inner layer of the pressure sleeve 14
4646
dünnwandige Röhre der Innenschicht 44thin-walled tube of inner layer 44
4848
Innenfläche der Röhre 46Inner surface of tube 46
5050
Außenfläche der Andrückwalze 12Outer surface of the pressure roller 12
5252
StützlagerSupport bearing
5454
Bolzenbolt
5656
GegengewichtmechanismusCounterweight mechanism
5858
Achszapfen der Andrückwalze 12Axle journal of the pressure roller 12
6060
Gelenkarm des Mechanismus 56Articulated arm of mechanism 56
6262
Teil für den Gelenkarm 60Part for the articulated arm 60
6464
Hebeteil für den Gelenkarm 60Lifting part for the articulated arm 60
6666
SchwenkteilSwivel part
6868
FestpunktBenchmark
7070
AktiviereinrichtungActivation device
7272
öffnungenopenings
7474
RohrleitungPipeline

Claims (14)

  1. Web transporting device having a rotatably driven transport roller (10) having a fixed axis and at least one engageable nip roller (12) whose axis extends essentially parallel to the fixed axis, and which is engageable against the driven transport roller (10), and has a length which corresponds to the maximum width of a web (16) to be processed in the printing machine, characterized in that a single exchangeable nip sleeve (14) mounted on the engageable nip roller (12) contains at least one annular gap (36) along its axial length in order to avoid the formation of folds in the web (16).
  2. Web transporting device according to Claim 1, characterized in that the exchangeable nip sleeve (14) comprises at least one layer of material.
  3. Web transporting device according to Claim 1, characterized in that the exchangeable nip sleeve (14) comprises the following features:
    a cylindrical outer layer (30) having a smooth, continuous outer surface which constitutes the jacket surface (32) of the nip sleeve (14);
    a cylindrical intermediate layer (38) which is located, seen in the radial direction, within the said outer layer (30), and the said intermediate layer (38) has a cylindrical outer surface (40) which is mounted fixedly on the cylindrical inner surface (42) of the said outer layer (30);
    and a cylindrical, tubular inner layer (44), a cylindrical inner surface (48) of the said inner layer (44) being in contact with a cylindrical outer surface (50) of the engageable nip roller (12).
  4. Web transporting device according to Claim 3, characterized in that the cylindrical outer layer (30) of the exchangeable nip sleeve (14) consists of a very thin, incompressible material of medium hardness.
  5. Web transporting device according to Claim 3, characterized in that the intermediate layer (38) of the exchangeable nip sleeve (14) consists of an elastic, compressible material.
  6. Web transporting device according to Claim 5, characterized in that the intermediate layer (38) of the exchangeable nip sleeve (14) is reinforced with a cotton fabric.
  7. Web transporting device according to Claim 3, characterized in that the inner layer (44) of the exchangeable nip sleeve (14) consists of an elastically expandable rigid material.
  8. Web transporting device according to Claim 3, characterized in that the exchangeable nip sleeve (14) comprises an additional layer which consists of a very thin, incompressible material of medium hardness and, seen in the radial direction, is mounted within the intermediate layer (38) and outside the inner layer (44).
  9. Web transporting device according to Claim 1, which furthermore comprises a counterbalancing mechanism (56) with which the engageable nip roller (12) is stabilized when the exchangeable nip sleeve (14), during exchange, is taken down from or mounted onto one side of the said engageable nip roller (12).
  10. Web transporting device according to Claim 9, characterized in that the counterbalancing mechanism (56) comprises a link arm (60) which is attached to a calliper-shaped part (62) at one end and to a lifting part (64) at the other end, and the lifting part (64) is, in turn, connected to a pivoting part (66) which turns about a fixed point (68), and the pivoting part (66) is, in turn, connected to an activating apparatus (70) which activates the counterbalancing mechanism (56) and moves the pivoting part (66) into a tilted position.
  11. Web transporting device according to Claim 10, characterized in that the calliper-shaped part (62) is designed in such a way that it fits over an axle journal (58) of the engageable nip roller (12) and the engageable nip roller (12) is thus locked in its position.
  12. Web transporting device according to Claim 11, characterized in that the activating apparatus (70) moves the link arm (60) until the calliper-shaped part (62) is securely positioned on the axle journal (58) of the engageable nip roller (12).
  13. Web transporting device according to Claim 1, characterized in that the engageable nip roller (12) has at least one radially extending opening (72) through which a pressure medium is supplied in order to expand the exchangeable nip sleeve (14) elastically during exchange.
  14. Web transporting device according to Claim 13, characterized in that the engageable nip roller (12) has a hollow interior which is connected to a source of a pressure medium via a pipe (74) through which a pressure medium passes into the interior of the engageable nip roller (12) and is conducted outwardly through the radially extending opening (72).
EP93119506A 1993-02-23 1993-12-03 Exchangeable press bushing Expired - Lifetime EP0614838B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2382493A 1993-02-23 1993-02-23
US23824 1993-02-23

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EP0614838A1 EP0614838A1 (en) 1994-09-14
EP0614838B1 true EP0614838B1 (en) 1997-10-15

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Family Applications (1)

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EP93119506A Expired - Lifetime EP0614838B1 (en) 1993-02-23 1993-12-03 Exchangeable press bushing

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EP (1) EP0614838B1 (en)
DE (2) DE4340915A1 (en)

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Publication number Publication date
US5398604A (en) 1995-03-21
EP0614838A1 (en) 1994-09-14
US5507226A (en) 1996-04-16
DE59307550D1 (en) 1997-11-20
DE4340915A1 (en) 1994-08-25

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