EP0110908A1 - Device for tensioning a rubber blanket. - Google Patents

Device for tensioning a rubber blanket.

Info

Publication number
EP0110908A1
EP0110908A1 EP19830901595 EP83901595A EP0110908A1 EP 0110908 A1 EP0110908 A1 EP 0110908A1 EP 19830901595 EP19830901595 EP 19830901595 EP 83901595 A EP83901595 A EP 83901595A EP 0110908 A1 EP0110908 A1 EP 0110908A1
Authority
EP
European Patent Office
Prior art keywords
tensioning
blanket
cylinder
reinforcement
shafts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19830901595
Other languages
German (de)
French (fr)
Other versions
EP0110908B1 (en
Inventor
Georg Herzan
Claus Simeth
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83901595T priority Critical patent/ATE23485T1/en
Publication of EP0110908A1 publication Critical patent/EP0110908A1/en
Application granted granted Critical
Publication of EP0110908B1 publication Critical patent/EP0110908B1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/125—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end on a curvilinear path, e.g. by winding on a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • Devices of this type are used to quickly and easily clamp printing blankets on a cylinder of a printing press, but especially blankets on the rubber cylinder of offset printing presses. It is particularly important to simplify operation and save time by changing the blanket without removing the cover of the cylinder channel and the blanket tension or releases in the tension or. Release movement of the tension shaft is integrated.
  • a device of this type is known and described in DE-PS 2 707 643.
  • the reinforcement of the printing blanket is inserted in the direction of a circular section in clamping spindles and held by locking elements.
  • the locking elements are designed as two-armed levers, extend over the entire length of the clamping spindles and are held by springs on one arm of the lever in a position that locks the blanket reinforcement.
  • the tensioning spindles are turned to relax the blanket, the locking elements are tilted by the second arm resting against fixed stops and the blanket armature is inevitably unlocked.
  • the blanket armor is locked when the tensioning spindles for tensioning the blanket are rotated by pulling the locking elements off the springs as they are turned away from the fixed stops.
  • the disadvantage of this device is that there is no certainty as to whether the printing blanket is also properly locked during tensioning.
  • the blanket reinforcement is clamped without any signs of incorrect operation even if it is not yet properly locked. There is then a danger that it will come loose from the clamp during operation and cause damage to the machine.
  • the clamping of the blanket armature is at such a flat angle to the jacket of the clamping spindle that the tensile force from the blanket tension must be intercepted to a large extent via the blanket armature, which can lead to damage to the blanket.
  • the locking of the blanket armature even partially opened during operation due to the interaction of the centrifugal force on the locking elements and a torque of the blanket armature from the tensile force of the blanket tension.
  • the tensile force should be derived from the tension of the blanket in such a way that no damage to the blanket can occur in the area of the reinforcement and it is also excluded that a tensile load from the blanket tension is applied solely via the reinforcement.
  • the invention is solved according to the characterizing part of patent claim 1.
  • This arrangement ensures that the printing blanket is only tensioned if it has been properly locked beforehand. The tensioning process is prevented if the blanket armor is only partially inserted. Since the locking elements cannot close now, the tension shaft cannot be rotated either.
  • the arrangement also supports the operator in that slight misalignments during the insertion of the blanket ends are compensated for by the locking elements by the blanket reinforcement. can slide into the locked position.
  • the radial position of the blanket reinforcement in the tensioning shaft deflects the blanket at an early stage and thus creates more friction surface for the transmission of the tensile forces. This reduces the introduction of force into the blanket reinforcement.
  • the arrangement of the spring elements for opening the locking elements in the unlocked position within a stop bar is advantageous.
  • This stop bar together with the one surface of the recess in the tensioning shaft, forms a slot which facilitates the insertion of the blanket armature and provides support against the tilting movement of the blanket armature when the blanket is tensioned. Opening the lock by centrifugal force or rubber blanket is completely impossible because of the positive locking.
  • FIG. 1 shows a section through the device with the locking elements open
  • Fig. 2 shows a section through the device with locked blanket reinforcements
  • Fig. 3 shows a section through the device with a tensioned blanket
  • Fig. 4 is a view of the tension shafts in the installed position, the channel cover and the counterweights are cut away.
  • a tensioning shaft 2 is rotatably mounted at the beginning of the print and a further tensioning shaft 3 at the end of the print for tensioning a printing blanket 4 on the cylinder 1.
  • bearing journals 5 are inserted into the end of the tensioning shafts 2, 3 and support elements 6, 7 are arranged in the cylinder channel.
  • the clamping shafts 2, 3 are held on the bearing journal 5 in the cylinder 1 and are supported by the support elements 6, 7 at four points against deflection.
  • Clamping blocks 8, 9 are arranged between the clamping shafts 2, 3 and are arranged symmetrically at two points of the clamping shafts 2, 3.
  • the support elements 6, 7 each have a radius corresponding to the chip shafts 2, 3 and support them over more than a quarter of their circumference.
  • the tension shafts 2, 3 are rotatable in the support surfaces 10, 11.
  • the spaces between the support elements 6, 7 offer movement space for the worm gear segments 12, 13 and stop screws 14, 15, 16, 17.
  • the worm gear segments 12, 13 are inserted in the back turns of the tensioning shafts 2, 3 and engage in worms 18, 19 which from Spannschrau ben 20, 21 from bevel gear 22, 23 are rotated.
  • the tensioning shafts 2, 3 can be adjusted in this way by one tensioning screw 20, 21 each.
  • the tensioning shafts 2, 3 each have a recess over their entire length, which is triangular in cross section and one side of which is located radially in the tensioning shaft and is narrower than the second side arranged at right angles to this.
  • the narrower side has a nose 24, 25 on the circumference of the tensioning shaft 2, 3 which is used to hold the reinforcement 42 of the
  • Printing blanket 4 is used.
  • the wider, parallel to a diameter surface of the recess each has a groove 26, 27 into which the locking element 28, 29 is inserted with the web 30, 31 on its underside.
  • Locking elements 28, 29 are designed in the shape of a circular arc. They are in each case on closing curves 32, 33, which are incorporated into the clamps 8, 9. The rear sides of the locking elements 28, 29 and the closing curves 32, 33 are essentially concentric with the axes of the tensioning shafts.
  • the closing curves have an opening part 34 and a closing part 35.
  • the closing part 35 has a radius corresponding to the rear of the locking elements 28, 29, while the curve curvature in the opening part 34 continuously decreases, so that the area of the closing curve 32, 33 deviates outwards from the radius of the closing part 35.
  • the locking elements 28, 29 finally rest on spring elements 36, which are held in stop bars 37, 38.
  • the stop bars 37, 38 are in turn on the wider surface of the recesses in the tension shafts 2, 3 under the locking elements elements 28, 29 and arranged parallel to the grooves 26, 27. Its side facing the narrow surface of the recess is designed as a guide surface for inserting the reinforcement 42 of the printing blanket 4.
  • the locking elements 28, 29 are thus supported between the closing curve 32, 33, groove 26, 27 and spring elements 36.
  • Hinges 39 are arranged to hold the locking elements 28, 29, the pivot point of which lies in an axis of rotation of the webs 30, 31 and the grooves 26, 27.
  • An additional counterweight 40 for balancing the cylinder 1 is arranged between the jacks 8, 9.
  • the clamps 8, 9 can be combined with the counterweight 40.
  • a duct cover 41 is attached to the counterweight 40.
  • the channel cover 41 leaves slots laterally in the circumferential direction for inserting the printing blanket 4 into the tensioning shafts 2, 3 and has openings for operating the tensioning screws 20, 21.
  • Fig. 1 the device is shown with opened locking elements.
  • the blanket 4 is first inserted with one end in the direction of the arrow into the tension shaft 2 at the beginning of the print.
  • the reinforcement 42 is pushed against the stop bar 37.
  • the tensioning shaft 2 By turning the tensioning shaft 2 in the tensioning direction, the locking element 28 is tilted to the left by the closing curve 32.
  • the reinforcement 42 therefore hooks on the one hand on the nose 24 of the tensioning shaft 2, while on the other side it is secured by the locking element 28.
  • the tensioning shaft places the printing blanket around the edge of the recess of the tensioning shaft 2 and on its surface. Therefore, the back turns for the worm gear segments 12, 13 are provided with filler segments 43, 44.
  • the contact surface for the printing blanket 4 is smooth.
  • the clamping process and the subsequent tensioning take place accordingly on the pushing end.
  • the underlay sheet 45 are hooked into a slot in the support element 6 at the start of printing.
  • the force from the printing blanket tension is caught by folding the printing blanket 4 at a right angle mainly via the friction on the tensioning shafts 2, 3.
  • the angle of the tensile force of the blanket 4 on the reinforcement 42 cannot change.

Abstract

Le dispositif pour fixer et tendre un blanchet sur un cylindre d'une imprimeuse doit être protégé contre une fausse manipulation et contre une ouverture accidentelle. De plus, les forces provenant de la mise sous tension du blanchet doivent être conduites de façon que l'armature n'absorbe plus la traction totale. A cet effet, un rouleau tendeur (2) comprend un organe de verrouillage (28) qui est pressé automatiquement par une came (32) en position de verrouillage, ou en position d'ouverture lors d'une rotation appropriée du rouleau tendeur. L'organe de verrouillage (28) pourvu d'une nervure (30) est reçu dans une rainure (26) contre une face d'un évidement rectangulaire du rouleau tendeur (2) et est supporté par des éléments à ressort (36). La came (32) agit sur l'arrière de l'élément de verrouillage. L'armature (42) du blanchet (4) est accrochée à un nez (24) dans l'évidement du rouleau tendeur (2), où elle est guidée par un listel de butée (37) et bloquée par l'élément de verrouillage (28). L'armature (42) est disposée radialement par rapport au rouleau tendeur (2) et est tenue à une certaine distance de lui de façon que le blanchet s'applique, lors de la mise sous tension, contre une arête et puis contre la surface du rouleau tendeur (2).The device for fixing and stretching a blanket on a cylinder of a printing press must be protected against mishandling and against accidental opening. In addition, the forces from the blanket tensioning must be conducted so that the frame no longer absorbs the total traction. To this end, a tension roller (2) comprises a locking member (28) which is automatically pressed by a cam (32) in the locked position, or in the open position during appropriate rotation of the tension roller. The locking member (28) provided with a rib (30) is received in a groove (26) against a face of a rectangular recess of the tension roller (2) and is supported by spring elements (36). The cam (32) acts on the rear of the locking element. The frame (42) of the blanket (4) is hooked to a nose (24) in the recess of the tension roller (2), where it is guided by a stop strip (37) and blocked by the locking element. (28). The frame (42) is arranged radially with respect to the tension roller (2) and is held at a certain distance from it so that the blanket is applied, during the tensioning, against an edge and then against the surface of the tension roller (2).

Description

Gummituchspannvorrichtung Blanket tensioner
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device according to the preamble of patent claim 1.
Vorrichtungen dieser Art werden verwendet, um Drucktücher schnell und einfach auf einem Zylinder einer Druckmaschine zu spannen, insbesondere aber Gummitücher auf dem Gummizylinder von Offsetdruckmaschinen. Es kommt dabei besonders auf die Bedienungsvereinfachung und Zeitersparnis an, indem ein Drucktuchwechsel ohne Entfernung der Abdeckung des Zylinderkanals vorgenommen werden kann und die Drucktuchspannung bzw. -freigäbe in die Spannbzw. Lösebewegung der Spannwelle integriert wird.Devices of this type are used to quickly and easily clamp printing blankets on a cylinder of a printing press, but especially blankets on the rubber cylinder of offset printing presses. It is particularly important to simplify operation and save time by changing the blanket without removing the cover of the cylinder channel and the blanket tension or releases in the tension or. Release movement of the tension shaft is integrated.
Eine Vorrichtung dieser Art ist bekannt und in der DE-PS 2 707 643 beschrieben. Die Armierung des Drucktuches wird hier in Richtung eines Kreisabschnitts in Spannspindeln eingelegt und von Verriegelungselementen gehalten. Die Verriegelungselemente sind als zweiarmige Hebel ausgebildet, erstrecken sich über die ganze Länge der Spannspindeln und werden durch Federn an einem Arm des Hebels in einer die Drucktucharmierung verriegelnden Position gehalten. Beim Drehen der Spannspindeln zum Entspannen des Drucktuches werden die Verriegelungselemente durch Anlage des zweiten Arms an festen Anschlägen gekippt und die Drucktucharmierung wird zwangsläufig entriegelt. Umgekehrt wird die Drucktucharmierung verriegelt, wenn die Spannspindeln zum Spannen des Drucktuches verdreht werden, indem die Verriegelungselemente von den Federn herunter gezogen werden, da sie von den festen Anschlägen weggedreht werden. Nachteilig ist an dieser Vorrichtung, daß keine Sicherheit besteht, ob das Drucktuch beim Spannen auch richtig verriegelt ist. Die Drucktucharmierung wird auch dann ohne Anzeichen einer Fehlbedienung geklemmt, wenn sie noch nicht richtig verriegelt ist. Es besteht dann die Gefahr, daß sie sich im Betrieb aus der Klemmung löst und Schäden in der Maschine verursacht. Weiterhin liegt die Klemmung der Drucktucharmierung in so flachem Winkel zum Mantel der Spannspindel, daß die Zugkraft aus der Drucktuchspannung zu einem großen Teil über die Drucktucharmierung abgefangen werden muß, was zu Schäden am Drucktuch führen kann. Schließlich hat sich die Verriegelung der Drucktucharmierung sogar durch das Zusammenwirken der Fliehkraft auf die Verriegelungselemente und eines Drehmoments der Drucktucharmierung aus der Zugkraft der Drucktuchspannung teilweise im Betrieb geöffnet.A device of this type is known and described in DE-PS 2 707 643. The reinforcement of the printing blanket is inserted in the direction of a circular section in clamping spindles and held by locking elements. The locking elements are designed as two-armed levers, extend over the entire length of the clamping spindles and are held by springs on one arm of the lever in a position that locks the blanket reinforcement. When the tensioning spindles are turned to relax the blanket, the locking elements are tilted by the second arm resting against fixed stops and the blanket armature is inevitably unlocked. Conversely, the blanket armor is locked when the tensioning spindles for tensioning the blanket are rotated by pulling the locking elements off the springs as they are turned away from the fixed stops. The disadvantage of this device is that there is no certainty as to whether the printing blanket is also properly locked during tensioning. The blanket reinforcement is clamped without any signs of incorrect operation even if it is not yet properly locked. There is then a danger that it will come loose from the clamp during operation and cause damage to the machine. Furthermore, the clamping of the blanket armature is at such a flat angle to the jacket of the clamping spindle that the tensile force from the blanket tension must be intercepted to a large extent via the blanket armature, which can lead to damage to the blanket. Finally, the locking of the blanket armature even partially opened during operation due to the interaction of the centrifugal force on the locking elements and a torque of the blanket armature from the tensile force of the blanket tension.
Es ist deshalb Aufgabe der Erfindung, die Verriegelung der Drucktucharmierung in der Spannwelle sicherzustellen, so daß keine Fehlbedienung vorkommen kann und auch keine Öffnung der Verriegelung im Betrieb möglich ist. Weiterhin soll die Zugkraft aus der Spannung des Drucktuches so abgeleitet werden, daß keine Schäden am Drucktuch im Bereich der Armierung entstehen können und auch ausgeschlossen ist, daß eine Zugbelastung aus der Drucktuchspannung allein über die Armierung aufgebracht wird.It is therefore an object of the invention to ensure the locking of the blanket armature in the tensioning shaft, so that no incorrect operation can occur and the lock cannot be opened during operation. Furthermore, the tensile force should be derived from the tension of the blanket in such a way that no damage to the blanket can occur in the area of the reinforcement and it is also excluded that a tensile load from the blanket tension is applied solely via the reinforcement.
Die Erfindung wird gemäß dem kennzeichnenden Teil des Patentanspruchs 1 gelöst. Durch diese Anordnung wird sichergestellt, daß das Drucktuch nur dann gespannt wird, wenn es zuvor auch richtig verriegelt wurde. Der Spannvorgang wird nämlich verhindert, wenn die Drucktucharmierung nur teilweise eingelegt ist. Da sich die Verriegelungselemente nun nicht schließen können, kann aber auch die Spannwelle nicht gedreht werden. Die Anordnung unterstützt die Bedienung weiterhin dadurch, daß geringe Fehllagen beim Einführen der Drucktuchenden durch die Verriegelungselemente ausgeglichen werden, indem sie die Drucktucharmierung noch. in die Verriegelungsposition schieben können. Schließlich ist auch von Vorteil, daß durch die radiale Lage der Drucktucharmierung in der Spannwelle das Drucktuch frühzeitig umgelenkt und damit mehr Reibungsfläche zur Übertragung der Zugkräfte geschaffen wird. Damit wird die Krafteinleitung in die Drucktucharmierung vermindert.The invention is solved according to the characterizing part of patent claim 1. This arrangement ensures that the printing blanket is only tensioned if it has been properly locked beforehand. The tensioning process is prevented if the blanket armor is only partially inserted. Since the locking elements cannot close now, the tension shaft cannot be rotated either. The arrangement also supports the operator in that slight misalignments during the insertion of the blanket ends are compensated for by the locking elements by the blanket reinforcement. can slide into the locked position. Finally, it is also advantageous that the radial position of the blanket reinforcement in the tensioning shaft deflects the blanket at an early stage and thus creates more friction surface for the transmission of the tensile forces. This reduces the introduction of force into the blanket reinforcement.
Weiterhin ist die Anordnung der Federelemente zum Öffnen der Verriegelungselemente in der Entriegelungsstellung innerhalb einer Anschlagleiste vorteilhaft. Diese Anschlagleiste bildet so zusammen mit der einen Fläche der Ausnehmung in der Spannwelle einen Schlitz, der das Einführen der Drucktucharmierung erleichtert und eine Abstützung gegen Kippbewegung der Drucktucharmierung beim Spannen des Drucktuches bewirkt. Ein öffnen der Verriegelung durch Fliehkraft oder Gummituchzug ist damit wegen des Formschlusses gänzlich unmöglich.Furthermore, the arrangement of the spring elements for opening the locking elements in the unlocked position within a stop bar is advantageous. This stop bar, together with the one surface of the recess in the tensioning shaft, forms a slot which facilitates the insertion of the blanket armature and provides support against the tilting movement of the blanket armature when the blanket is tensioned. Opening the lock by centrifugal force or rubber blanket is completely impossible because of the positive locking.
Eine spezielle Ausgestaltung dieser Vorrichtung wird im Folgenden beschrieben. Die Darstellungen enthalten im Einzelnen in Fig. 1 einen Schnitt durch die Vorrichtung bei geöffneten Verriegelungselementen, inA special embodiment of this device is described below. The representations contain in detail in Fig. 1 shows a section through the device with the locking elements open, in
Fig. 2 einen Schnitt durch die Vorrichtung mit verriegelten Drucktucharmierungen, inFig. 2 shows a section through the device with locked blanket reinforcements, in
Fig. 3 einen Schnitt durch die Vorrichtung bei nachgespanntem Drucktuch und inFig. 3 shows a section through the device with a tensioned blanket and in
Fig. 4 eine Ansicht der Spannwellen in Einbaulage, wobei die Kanalabdeckung und die Gegengewichte weggeschnitten sind.Fig. 4 is a view of the tension shafts in the installed position, the channel cover and the counterweights are cut away.
Im Zylinderkanal eines Zylinders 1 einer Druckmaschine ist eine Spannwelle 2 am Druckanfang und eine weitere Spannwelle 3 am Druckende zum Spannen eines Drucktuches 4 auf dem Zylinder 1 drehbar gelagert. Dazu werden in die Spannwellen 2, 3 jeweils stirnseitig Lagerzapfen 5 eingesetzt und im Zylinderkanal Stützelemente 6, 7 angeordnet. Die Spannwellen 2-, 3 werden an den Lagerzapfen 5 im Zylinder 1 gehalten und von den Stützelementen 6, 7 an vier Punkten gegen Durchbiegung abgestützt. Zwischen den Spannwellen 2, 3 sind Spannböcke 8, 9 angeordnet, die symmetrisch an zwei Punkten der Spannwellen 2, 3 angeordnet sind. Die Stützelemente 6, 7 besitzen jeweils einen den Spanhwellen 2, 3 entsprechenden Radius und stützen diese über mehr als ein Viertel ihres Umfangs ab. Die Spannwellen 2, 3 sind in den Stützflächen 10, 11 drehbar. Die Zwischenräume zwischen den Stützelementen 6, 7 bieten Bewegungsräume für die Schneckenradsegmente 12, 13 und Anschlagschrauben 14, 15, 16, 17. Die Schneckenradsegmente 12, 13 sind in Hinterdrehungen der Spannwellen 2, 3 eingesetzt und greifen in Schnecken 18, 19 ein, die von Spannschrau ben 20, 21 aus über Kegelradgetriebe 22, 23 verdreht werden. Die Spannwellen 2, 3 sind auf diese Weise von je einer Spannschraube 20, 21 aus verstellbar. Die Spannwellen 2, 3 besitzen über ihre ganze Länge je eine Aussparung, die im Querschnitt dreieckig ist und deren eine Seite radial in der Spannwelle steht und schmaler ist als die rechtwinklig zu dieser angeordnete zweite Seite. Die schmalere Seite weist am Umfang der Spannwelle 2, 3 eine Nase 24, 25 auf, die zum Halten der Armierung 42 desIn the cylinder channel of a cylinder 1 of a printing press, a tensioning shaft 2 is rotatably mounted at the beginning of the print and a further tensioning shaft 3 at the end of the print for tensioning a printing blanket 4 on the cylinder 1. For this purpose, bearing journals 5 are inserted into the end of the tensioning shafts 2, 3 and support elements 6, 7 are arranged in the cylinder channel. The clamping shafts 2, 3 are held on the bearing journal 5 in the cylinder 1 and are supported by the support elements 6, 7 at four points against deflection. Clamping blocks 8, 9 are arranged between the clamping shafts 2, 3 and are arranged symmetrically at two points of the clamping shafts 2, 3. The support elements 6, 7 each have a radius corresponding to the chip shafts 2, 3 and support them over more than a quarter of their circumference. The tension shafts 2, 3 are rotatable in the support surfaces 10, 11. The spaces between the support elements 6, 7 offer movement space for the worm gear segments 12, 13 and stop screws 14, 15, 16, 17. The worm gear segments 12, 13 are inserted in the back turns of the tensioning shafts 2, 3 and engage in worms 18, 19 which from Spannschrau ben 20, 21 from bevel gear 22, 23 are rotated. The tensioning shafts 2, 3 can be adjusted in this way by one tensioning screw 20, 21 each. The tensioning shafts 2, 3 each have a recess over their entire length, which is triangular in cross section and one side of which is located radially in the tensioning shaft and is narrower than the second side arranged at right angles to this. The narrower side has a nose 24, 25 on the circumference of the tensioning shaft 2, 3 which is used to hold the reinforcement 42 of the
Drucktuches 4 dient. Die breitere, parallel zu einem Durchmesser liegende Fläche der Ausnehmung weist jeweils eine Nut 26, 27 auf, in die das Verriegelungselement 28, 29 mit dem Steg 30, 31 an seiner Unterseite eingesetzt wird. Die Rückseiten derPrinting blanket 4 is used. The wider, parallel to a diameter surface of the recess each has a groove 26, 27 into which the locking element 28, 29 is inserted with the web 30, 31 on its underside. The back of the
Verriegelungselemente 28, 29 sind kreisbogenförmig ausgebildet. Sie liegen jeweils an Schließkurven 32, 33 an, die in die Spannböcke 8, 9 eingearbeitet sind. Die Rückseiten der Verriegelungselemente 28, 29 und die Schließkurven 32, 33 liegen im wesentlichen konzentrisch zu den Achsen der Spannwellen. Die Schließkurven weisen einen Öffnungsteil 34 und einen Schließteil 35 auf. Der Schließteil 35 hat einen der Rückseite der Verriegelungselemente 28, 29 entsprechenden Radius, während sich die Kurvenkrümmung im Öffnungsteil 34 kontinuierlich verringert, so daß die Fläche der Schließkurve 32, 33 nach außen vom Radius des Schließteils 35 abweicht. Die Verriegelungselemente 28, 29 liegen schließlich auf Federelementen 36 auf, die in Anschlagleisten 37, 38 gehalten werden. Die Anschlagleisten 37, 38 sind wiederum auf der breiteren Fläche der Ausnehmungen in den Spannwellen 2, 3 unter den Verriegelungsele menten 28, 29 und parallel zu den Nuten 26, 27 angeordnet. Ihre zur schmalen Fläche der Ausnehmung hingewandte Seite ist als Leitfläche zum Einführen der Armierung 42 des Drucktuches 4 ausgebildet. Die Verriegelungselemente 28, 29 stützen sich also zwischen Schließkurve 32, 33, Nut 26, 27 und Federelementen 36 ab. Zur Halterung der Verriegelungselemente 28, 29 sind Scharniere 39 angeordnet, deren Drehpunkt in einer Drehachse der Stege 30, 31 und den Nuten 26, 27 liegt.Locking elements 28, 29 are designed in the shape of a circular arc. They are in each case on closing curves 32, 33, which are incorporated into the clamps 8, 9. The rear sides of the locking elements 28, 29 and the closing curves 32, 33 are essentially concentric with the axes of the tensioning shafts. The closing curves have an opening part 34 and a closing part 35. The closing part 35 has a radius corresponding to the rear of the locking elements 28, 29, while the curve curvature in the opening part 34 continuously decreases, so that the area of the closing curve 32, 33 deviates outwards from the radius of the closing part 35. The locking elements 28, 29 finally rest on spring elements 36, which are held in stop bars 37, 38. The stop bars 37, 38 are in turn on the wider surface of the recesses in the tension shafts 2, 3 under the locking elements elements 28, 29 and arranged parallel to the grooves 26, 27. Its side facing the narrow surface of the recess is designed as a guide surface for inserting the reinforcement 42 of the printing blanket 4. The locking elements 28, 29 are thus supported between the closing curve 32, 33, groove 26, 27 and spring elements 36. Hinges 39 are arranged to hold the locking elements 28, 29, the pivot point of which lies in an axis of rotation of the webs 30, 31 and the grooves 26, 27.
Zwischen den Spannböcken 8, 9 ist ein zusätzliches Gegengewicht 40 zum Unwuchtausgleich des Zylinders 1 angeordnet. Die Spannböcke 8, 9 können mit dem Gegengewicht 40 kombiniert werden. Auf dem Gegengewicht 40 ist eine Kanalabdecleung 41 befestigt. Die Kanalabdeckung 41 läßt seitlich in Umfangsrichtung Schlitze zum Einführen des Drucktuches 4 in die Spannwellen 2, 3 frei und weist Öffnungen zur Bedienung der Spannschrauben 20, 21 auf.An additional counterweight 40 for balancing the cylinder 1 is arranged between the jacks 8, 9. The clamps 8, 9 can be combined with the counterweight 40. A duct cover 41 is attached to the counterweight 40. The channel cover 41 leaves slots laterally in the circumferential direction for inserting the printing blanket 4 into the tensioning shafts 2, 3 and has openings for operating the tensioning screws 20, 21.
In Fig. 1 ist die Vorrichtung mit geöffneten Verriegelungselementen dargestellt. Das Drucktuch 4 wird zuerst mit seinem einen Ende in Richtung des Pfeils in die Spannwelle 2 am Druckanfang eingeführt. Die Armierung 42 wird bis gegen die Anschlagleiste 37 geschoben. Durch Verdrehen der Spannwelle 2 in Spannrichtung wird das Verriegelungselement 28 von der Schließkurve 32 nach links gekippt. Die Armierung 42 hakt daher einerseits an der Nase 24 der Spannwelle 2 ein, während sie auf der anderen Seite vom Verriegelungselement 28 gesichert wird. Beim weiteren Drehen der Spannwelle legt sich, wie in Fig. 2 sichtbar, das Drucktuch um die Kante der Ausnehmung der Spannwelle 2 und an deren Oberfläche an. Deshalb sind die Hinterdrehungen für die Schneckenradsegmente 12, 13 mit Füllsegmenten 43, 44 versehen. So ist die Auflagefläche für das Drucktuch 4 glattflächig.In Fig. 1 the device is shown with opened locking elements. The blanket 4 is first inserted with one end in the direction of the arrow into the tension shaft 2 at the beginning of the print. The reinforcement 42 is pushed against the stop bar 37. By turning the tensioning shaft 2 in the tensioning direction, the locking element 28 is tilted to the left by the closing curve 32. The reinforcement 42 therefore hooks on the one hand on the nose 24 of the tensioning shaft 2, while on the other side it is secured by the locking element 28. In the further Turning the tensioning shaft, as can be seen in FIG. 2, places the printing blanket around the edge of the recess of the tensioning shaft 2 and on its surface. Therefore, the back turns for the worm gear segments 12, 13 are provided with filler segments 43, 44. The contact surface for the printing blanket 4 is smooth.
Der Klemmvorgang und das anschließende Spannen läuft auf der Drückende-Seite entsprechend ab. Die Unter lagebogen 45 werden in einem Schlitz im Stützelement 6 am Druckanfang verhakt. Die Kraft aus der Drucktuchspannung wird durch das Umlegen des Drucktuches 4 in einem rechten Winkel hauptsächlich über die Reibung an den Spannwellen 2, 3 gefangen. Außerdem kann sich der Winkel der Zugkraft des Drucktuches 4 an der Armierung 42 nicht verändern.The clamping process and the subsequent tensioning take place accordingly on the pushing end. The underlay sheet 45 are hooked into a slot in the support element 6 at the start of printing. The force from the printing blanket tension is caught by folding the printing blanket 4 at a right angle mainly via the friction on the tensioning shafts 2, 3. In addition, the angle of the tensile force of the blanket 4 on the reinforcement 42 cannot change.
Beim Einlegen der Armierung 42 in die Spannwelle ist keine Fehlbedienung möglich, da das Verriegelungs-element die Armierung 42 entweder vollständig einzieht oder bei Fehlianlage verklemmt und so die ganze Spannwelle blockiert. Das Verriegelungselement 28 kann nicht frühzeitig oder zu weit geöffent werden, da Anschlagschrauben 14, 15 die Spannwellendrehung in der Öffnungsrichtung begrenzen und das Verriegelungselement 28 erst im letzten Teil der Drehung von den Federlementen 36 gegen die in diesem Bereich nach außen weggehende Schließkurve 32 gedrückt und so geöffnet werden. Ebenso ist die Spannung des Drucktuches 4 durch Anschlagschrauben 16, 17 begrenzt. Den Anschlagschrauben 15, 17 an den Spannwellen 2, 3 sind jeweils gegenüberliegende Anschlagschrauben 16, 14 im Zylinderkanal zugeordnet. In Fig. 3 ist die Konfiguration bei nachgespanntem Drucktuch gezeigt. Wenn am Druckanfang durch Produktionsstörungen eine Drucktuchbeschädigung entsteht, kann durch Entspannen des Drucktuches 4, Verschieben in Richtung Druckanfang und erneutes Spannen der beschädigte Teil des Drucktuches aus dem Druckbereich genommen werden. Incorrect operation is not possible when inserting the reinforcement 42 into the tensioning shaft, since the locking element either pulls the reinforcement 42 fully in or jams it in the event of a fault and thus blocks the entire tensioning shaft. The locking element 28 cannot be opened early or too far, since stop screws 14, 15 limit the rotation of the tension shaft in the opening direction and the locking element 28 is only pressed by the spring elements 36 against the closing curve 32 going outward in this area in the last part of the rotation and so on be opened. Likewise, the tension of the blanket 4 is limited by stop screws 16, 17. The stop screws 15, 17 on the tension shafts 2, 3 are respectively opposite stop screws 16, 14 assigned in the cylinder channel. 3 shows the configuration with the printing blanket retensioned. If there is damage to the printing blanket at the start of printing due to production disruptions, the damaged part of the printing blanket can be removed from the printing area by relaxing the printing blanket 4, moving it towards the beginning of printing and tensioning it again.
BezugszeichenlisteReference list
1 Zylinder 32 Schließkurven1 cylinder 32 closing curves
2 Spannwelle 33 ''2 clamping shaft 33 ''
3 '' 34 Öffnungsteil3 '' 34 opening part
4 Drucktuch 35 Schließteil4 blanket 35 closing part
5 Lagerzapfen 36 Federelement5 journals 36 spring element
6 Stützelement 37 Anschlagleiste6 support element 37 stop bar
7 '' 38 ''7 '' 38 ''
8 Spannbock 39 Scharnier8 clamp 39 hinge
9 '' 40 Gegengewicht 10 Stützfläche 41 Kanalabdeckung 11 '' 42 Armierung 12 Schneckenradsegment 43 Füllsegment 13 '' 44 '' 14 Anschlagschraube 45 Unterlagebogen 15 '' 16 '' 17 '' 18 Schnecke 19 '' 20 Spannschraube 21 '' 22 Kegelradgetriebe 23 '' 24 Nase 25 '' 26 Nut 27 '' 28 Verriegelungselement 29 '' 30 Steg 31 '' 9 '' 40 counterweight 10 support surface 41 duct cover 11 '' 42 reinforcement 12 worm gear segment 43 filler segment 13 '' 44 '' 14 stop screw 45 washer 15 '' 16 '' 17 '' 18 worm 19 '' 20 clamping screw 21 '' 22 bevel gear 23 '' 24 nose 25 '' 26 groove 27 '' 28 locking element 29 '' 30 bar 31 ''

Claims

GummituchspannvgrrichtungPatentansprüche Blanket tensioning device
1.) Vorrichtung zum Befestigen und Spannen eines Drucktuches auf einem Zylinder einer Druckmaschine aus im Zylinderkanal des Zylinders unter einer festen Abdeckung verdrehbar gelagerten Spannwellen, die mit Ausnehmungen zum Einlegen der Armierung der Drucktuchenden versehen sind und Verriegelungselemente vorzugsweise in Form von sich über die Zylinderlänge erstreckenden Kippleisten zum Sichern der Armierungen an den Spannwellen tragen, wobei die Verriegelungs- elemente beim Verdrehen der Spannwellen in Spannrichtung selbsttätig die Armierung der Drucktuchenden an der Spannwelle sichern und beim Verdrehen in Löserichtung diese selbsttätig freigeben, d a d u r c h g e k e n n z e i c hn e t, daß die Ausnehmungen zur Aufnahme der Armierung der Drucktuchenden radial ausgerichtet und vom äußeren Umfang entfernt in den Spannwellen (2, 3) angeordnet sind und die Verriegelungselemente (28, 29) an ihrer von der Spannwelle (2, 3) abgewandten Seite mit einer gewölbten Fläche versehen sind, die jeweils mit einer fest am Zylinder (1) angeordneten Schließkurve (32, 33) zusammenarbeitet und daß weiterhin die Verriegelungselemente (28, 29) auf Federelementen (36) abgestützt werden. 1.) Device for fastening and tensioning a printing blanket on a cylinder of a printing machine from tensioning shafts rotatably mounted in the cylinder channel of the cylinder under a fixed cover, which are provided with recesses for inserting the reinforcement of the printing blanket ends and locking elements preferably in the form of extending over the cylinder length Wear tilting strips to secure the reinforcements on the tensioning shafts, whereby the locking elements automatically secure the reinforcement of the blanket ends on the tensioning shaft when the tensioning shafts are turned in the tensioning direction and release them automatically when turning in the release direction, characterized in that the recesses for receiving the reinforcement the blanket ends are aligned radially and are arranged away from the outer circumference in the tensioning shafts (2, 3) and the locking elements (28, 29) are provided on their side facing away from the tensioning shaft (2, 3) with a curved surface, each of which m it works together with a closing curve (32, 33) arranged on the cylinder (1) and that the locking elements (28, 29) are still supported on spring elements (36).
2.) Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Verriegelungselemente (28, 29) an ihrer Unterseite mit einem Steg (30, 31) versehen sind, der sich in einer Nut (26, 27) der jeweiligen Spannwelle (2, 3) abstützt, und durch Scharniere (39), deren Drehachse koaxial zur Drehachse des Steges (30, 31) in den Nuten (26, 27) liegen, an den Spannwellen (2, 3) befestigt sind.2.) Device according to claim 1, characterized in that the locking elements (28, 29) are provided on their underside with a web (30, 31) which is in a groove (26, 27) of the respective tension shaft (2, 3) is supported, and by hinges (39), the axis of rotation of which lie coaxially to the axis of rotation of the web (30, 31) in the grooves (26, 27), are fastened to the tensioning shafts (2, 3).
3.) Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Federelemente (36) in Anschlagleisten (37, 38) angeordnet sind und die Anschlagleisten (37, 38) parallel zu den Ausnehmungen in der Spannwelle (2, 3) angeordnet sind, so daß sie zusammen mit der radial ausgerichteten Fläche der Ausnehmung eine Führung zum Einsetzen der Armierung (42) des Drucktuches (4) in die Spannwellen (2, 3) bilden.3.) Device according to claim 1, characterized in that the spring elements (36) are arranged in stop bars (37, 38) and the stop bars (37, 38) are arranged parallel to the recesses in the tensioning shaft (2, 3), so that together with the radially oriented surface of the recess, they form a guide for inserting the reinforcement (42) of the printing blanket (4) into the tensioning shafts (2, 3).
4. ) Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, däß die Schließkurven (32, 33) in die zum Un wuchtausgleich dienenden Gegengewichte (40) des Zylinders (1) eingearbeitet sind.4.) Device according to claim 1, d a d u r c h g e k e n n z e i c h n e t, according to which the closing curves (32, 33) are incorporated into the counterweights (40) of the cylinder (1) which serve to balance the unbalance.
5.) Vorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß Anschlagschrauben zur Begrenzung der Drehbewegung der Spannwellen (2, 3) vorgesehen sind, derart, daß an den Spannwellen (2, 3) und am Zylinder (1) korrespondierende Anschlag schrauben (14, 15) für die Stellung zum Einlegen der Armierung (42) des Druckruches (4) und weitere Anschlagschrauben (16, 17) für die maximale Spannung des Drucktuches (4) angeordnet sind, und daß als Anschlagschrauben Zylinderkopfschrauben verwendet werden. 5.) Device according to claim 1, characterized in that stop screws for limiting the rotational movement of the tensioning shafts (2, 3) are provided, such that on the tensioning shafts (2, 3) and on the cylinder (1) corresponding stop screws (14, 15) for the position for inserting the reinforcement (42) of the printing blanket (4) and further stop screws (16, 17) for the maximum tension of the printing blanket (4) are arranged, and that cylinder head screws are used as stop screws.
EP19830901595 1982-05-26 1983-05-24 Device for tensioning a rubber blanket Expired EP0110908B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901595T ATE23485T1 (en) 1982-05-26 1983-05-24 RUBBER CLOTH TENSIONING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219741 1982-05-26
DE19823219741 DE3219741C1 (en) 1982-05-26 1982-05-26 Blanket tensioner

Publications (2)

Publication Number Publication Date
EP0110908A1 true EP0110908A1 (en) 1984-06-20
EP0110908B1 EP0110908B1 (en) 1986-11-12

Family

ID=6164520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901595 Expired EP0110908B1 (en) 1982-05-26 1983-05-24 Device for tensioning a rubber blanket

Country Status (4)

Country Link
EP (1) EP0110908B1 (en)
JP (1) JPS59500956A (en)
DE (1) DE3219741C1 (en)
WO (1) WO1983004218A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334129A (en) * 1991-12-07 1994-08-02 Heidelberger Druckmaschinen Ag Cross-cutter for final treatment or finishing of webs of material
US6520085B1 (en) 1998-11-26 2003-02-18 Heidelberger Druckmaschinen Ag Device for tensioning a cylinder dressing on a printing machine-cylinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545172A1 (en) * 1985-12-20 1987-07-02 Roland Man Druckmasch DEVICE FOR FIT-ALIGNING A RUBBER CLOTH ON A RUBBER CLOTH OR FORM CYLINDERS
DE4127714A1 (en) * 1991-08-22 1993-02-25 Koenig & Bauer Ag DEVICE FOR FASTENING AND TENSIONING A PRINT SCARF ON A CYLINDER OF A PRINTING MACHINE

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DE388029C (en) * 1921-10-23 1924-01-08 Vogtlaendische Maschinenfabrik Clamping device for flexible printing plates on rubber printing rotary machines
US2578406A (en) * 1948-05-15 1951-12-11 Time Inc Blanket clamp for blanket cylinders of printing presses
DE1227480B (en) * 1964-04-25 1966-10-27 Plamag Plauener Druckmaschinen Device for clamping flexible printing plates on the forme cylinder of a printing machine
DE1198376B (en) * 1964-04-29 1965-08-12 Roland Offsetmaschf Arrangement for fastening the rubber blanket on the rubber cylinder of offset printing machines
DE2606223A1 (en) * 1976-02-17 1977-08-18 Maschf Augsburg Nuernberg Ag DEVICE FOR TENSIONING THE RUBBER CLOTH OF AN OFFSET PRINTING MACHINE
DE2707643C3 (en) * 1977-02-23 1980-03-27 M.A.N. - Roland Druckmaschinen Ag, 6050 Offenbach Device for tensioning a printing blanket on the cylinder of a printing machine
GB1556389A (en) * 1977-05-02 1979-11-21 Linotype Machinery Ltd Printing machines

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* Cited by examiner, † Cited by third party
Title
See references of WO8304218A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334129A (en) * 1991-12-07 1994-08-02 Heidelberger Druckmaschinen Ag Cross-cutter for final treatment or finishing of webs of material
US6520085B1 (en) 1998-11-26 2003-02-18 Heidelberger Druckmaschinen Ag Device for tensioning a cylinder dressing on a printing machine-cylinder

Also Published As

Publication number Publication date
JPS59500956A (en) 1984-05-31
EP0110908B1 (en) 1986-11-12
DE3219741C1 (en) 1987-11-12
WO1983004218A1 (en) 1983-12-08

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