EP0679593B1 - Intermittent roller for transporting sheets in a printing machine - Google Patents

Intermittent roller for transporting sheets in a printing machine Download PDF

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Publication number
EP0679593B1
EP0679593B1 EP95104641A EP95104641A EP0679593B1 EP 0679593 B1 EP0679593 B1 EP 0679593B1 EP 95104641 A EP95104641 A EP 95104641A EP 95104641 A EP95104641 A EP 95104641A EP 0679593 B1 EP0679593 B1 EP 0679593B1
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EP
European Patent Office
Prior art keywords
roller
shaft
sheet
clock
rotatably mounted
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
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EP95104641A
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German (de)
French (fr)
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EP0679593A1 (en
Inventor
Martin Greive
Günter Zobl
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0679593A1 publication Critical patent/EP0679593A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness

Definitions

  • the invention relates to a device for transporting sheets into a sheet processing machine according to the preamble of the main claim.
  • the uppermost sheet of a sheet stack in the area of the leading edge is grasped by means of a suction rod, separated, lifted between a clock roller and a transport roller and from there guided to the grippers of a cylinder of the sheet processing machine via a sheet guiding device.
  • the clock roller is either a roller with a continuous axis that carries rubber rings at defined intervals, or individual rollers that are rigidly attached to a clocked axis.
  • the timing itself takes place in such a way that the timing roller touches the transport roller when the sheet is taken over by the suction rod and is lifted off the transport roller as soon as the grippers of the cylinder have gripped the sheet. The latter means that the bow can be taken freely by the grippers.
  • the clock rollers work at a higher speed than the printing press speed. This increased speed is required so that the sheet can catch up with the gripper stops and thus be correctly aligned with the gripper stops.
  • the suction speed and the speed of the Transport rollers must be optimally coordinated.
  • Optimal sheet guidance can only be achieved if the suction cups can pivot into the working area of the clock roller during the swiveling movement carried out in the sheet conveying direction.
  • this is not possible, so that an optimal coordination between the clocking of the suction cups and the clocking of the clock roll must be avoided.
  • Sheets of different formats and different quality are processed in a printing press.
  • Document FR-A 2 318 090 shows a device for transporting sheets in a sheet-processing machine, which is arranged on a clocked shaft and can be pressed onto a transport shaft with an adjustable contact pressure, the device having a rotatably mounted roller which is adjustable in height and is axially displaceable.
  • Document US-A 1,910,506 also shows a generic device for transporting sheets to a sheet-processing machine, which is arranged on a clocked shaft and can be pressed onto an transport roller with an adjustable contact pressure, the device having a rotatably mounted roller that is height-adjustable and is axially displaceable.
  • the object of the invention is to propose a cycle roll, which ensures the supply of sheets of various types and formats to the sheet-processing machine.
  • the clock roller is a rotatably mounted element that is attached to a height-adjustable element.
  • the rotatably mounted element is a ball bearing with a spherical rubber coating.
  • the sheet transport can be optimized in that the coating consists of an elastic material that has a high coefficient of friction; in addition, the material should be wear-resistant and not very color-accepting.
  • All clock rollers have a defined zero position. This is the setting in which the spherical rubber coating of the roller is compressed so that the diameter of the roller decreases by a certain amount. Depending on the type of paper to be processed, the height-adjustable element is adjusted by defined amounts.
  • the height-adjustable element is a spring plate with a predetermined bending line.
  • the bending line of the spring plate is calculated so that the contact pressure can be changed within a defined range. In particular, this area is selected so that all types of paper to be processed are easily transported into the printing press.
  • the height-adjustable element consists of two levers, the clock roller being adjustable to the desired pressure via a pivot point and a compression spring.
  • This embodiment is to be seen as an equivalent embodiment to the prestressed spring plate.
  • a wide variety of formats are printed in a sheet-processing machine, in particular in a printing press.
  • the individual clock rollers are slidably mounted on a shaft.
  • the axial adjustment of the clock rollers can be of great advantage if papers that have already been printed are to be fed again to the sheet-processing machine.
  • the individual clock rollers can be set to pressure-free areas according to this advantageous development of the invention.
  • catch recesses are provided on the shaft in defined positions; at least one corresponding latching mechanism is provided on each clock roller.
  • the latching mechanism is a ball latch, which latches in the position of the latching recesses when the clock roller is moved.
  • the cycle roll or cycle rolls are firmly connected to the axis during sheet feeding.
  • the following is provided as a quickly detachable fastening device for the cycle roller: a pin is pressed into a notch in the shaft in a position defined by the catch recesses by means of a toggle screw.
  • the cycle roller can also be fixed on the shaft by means of a quick-release device.
  • the settings of the various clock rollers can be carried out parallel and evenly to the transport roller. This is particularly important, since optimal sheet guidance can only be achieved with the same contact pressure of all cycle rolls.
  • a scale is attached to the set screw, for example, which assigns a defined height adjustment of the rotatably mounted roller to an angle of rotation of the set screw.
  • a locking element or a locking spring is provided to fix the set screw in a desired position.
  • the two bearing parts in which the rotatably mounted roller is fastened are designed such that they extend beyond the rubber coating in the lower region. This configuration prevents damage to the rubber coating if the clock roller is moved on the shaft and possibly strikes the edges of the sheet guiding device.
  • Fig. 1 shows a section through the application area of a printing press; in particular, Fig. 1 shows a Side view of the cycle roll 1 according to the invention.
  • the uppermost sheet 5 of a sheet stack is gripped by the suction devices 6, which are arranged on an axis 7, in the region of the leading edge, and by a pivoting movement of the axis 7 in the sheet conveying direction between the roll 8 Clock roller 1 and the transport roller 9 performed.
  • the clocking of the axis 7 and the clocking of the clock roller 1 are coordinated with one another in such a way that the sucker 6 releases the bow 5 at the point of swing at the latest.
  • the roller 8 rolls under pressure on the transport roller 9 and pushes the sheet 5 through the sheet guiding device 2, which consists of an upper sheet guiding device 3 and a lower sheet guiding device 4, against the gripper stops 10
  • the sheet 5 is transported to the gripper stops 10 and bulked, whereby it is precisely aligned with the gripper stops 10.
  • the clock roller 1 is lifted off the transport roller 9. After the gripper is closed, the sheet 5 is completely free and can be moved at machine speed.
  • Grippers 11 and gripper stops 10 are arranged in a known manner in a cylinder 12 of the printing press, not shown separately.
  • the clock roller 1 is fixed on a shaft 33 via two bearing levers 19 and a fastening mechanism 26, 27, 28 in a rotationally fixed manner.
  • the essential components of the clock roller 1 are: a prestressed spring plate 13, an adjusting thread 14 and the roller 8 rotatably mounted in the bearing plates 15.
  • the roller 8 consists of a ball bearing 16 which has a rubber coating 17.
  • the bearing plate 15 has a projection 18 in the lower region.
  • the spring plate 13 is in the front area via two screws 21 connected to the bearing levers 19.
  • the base 22 ensures a defined bending line for the spring plate 13. Above the center of the roller 8, an adjusting thread 14 is attached in the spring plate 13.
  • the roller 8 can be adjusted in height by a defined amount via the adjusting screw 23, which carries a scale 24.
  • the clock roller 1 is fixed in a locking position of the shaft 33 via an adjusting mechanism.
  • This adjusting mechanism consists of a notch 28 made in the axis 33 and a cylindrical pin 27 which is pressed into the notch 28 via the toggle screw 26.
  • the sheet metal part 29, which is fastened to the bearing levers 19 via the ball catch 31 and the nut 30, ensures that the cylinder pin 27 does not fall out laterally during the adjustment process of the clock roller 1.
  • the clock roller 1 is set to the type of paper to be processed, i. H. the contact pressure between the rubber coating 17 of the roller 8 and the transport roller 9 is selected depending on the thickness of the sheet 5 to be transported.
  • the optimum setting in each case can easily be found using the scale 24 on the adjusting screw 23.
  • the clocking of the clock roller 1, that is to say the setting and pressing of the roller 8 against the transport roller 9, is carried out in a known manner via a cam control.
  • the shaft 33 is rigidly coupled to a lever 34. In the lower region of the lever 34, a roller 48 is attached, which rolls on a curve 36.
  • FIG. 2 shows a plan view of an arrangement of the clock rollers 1 according to the invention.
  • the lower sheet guiding device 4 is connected to the side parts 38, 39 by means of fastening means.
  • the upper sheet guiding device 3 is screwed on.
  • the screws 49 are designed as knurled screws.
  • the upper sheet guide device 3 has cutouts 40, 41 both in its front area and in its rear area.
  • the grippers 11 engage in the cutouts 41 in the front region of the upper sheet guiding device 3.
  • the cutouts 40 in the rear area of the upper sheet guiding device 3 create space for the roll 8 of the cycle roll 1.
  • the edges of the cutouts 40 are advantageously beveled; this measure reduces the risk of the sheets 5 getting caught on the edges.
  • the clock rollers 1 are detachably fastened on the axis 33.
  • the clock rollers 1 are each fixed in the positions defined by the notches 37 on the axis 33. These positions are chosen so that they lie on the gap with the suction cups 6, which in turn are attached to a separate shaft 7.
  • the special arrangement prevents the suckers 6 from colliding with the roller 8 of the clock roller 1 in any operating state.
  • the toggle screw 26 is loosened; the clock roller 1 is then raised by slight pivoting in the rear area so that it does not collide with parts of the upper sheet guide device 3.
  • the pivoting of the clock roller 1 is limited by a nose 32 in the front region of the bearing lever 19.
  • the pin of the shaft 33 is mounted on the operator side in the side part 38. On the drive side, the axis 33 is guided through the side part 39 and mounted in a bearing part 42. A displacement of the axis 33 in axial direction is prevented by the stop 45 and by the adjusting ring 47.
  • the pin of the shaft 33 is rigidly connected to a lever 34 on the drive side. In the lower region of the lever 34, a cam roller 48 is screwed on. The lever 34 is set against the curve 36 via the spring 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Handling Of Cut Paper (AREA)
  • Replacement Of Web Rolls (AREA)
  • Making Paper Articles (AREA)

Abstract

The roller (1) has a rotatable element (8), which is fastened to a height-adjustable element. This consists of a spring steel sheet (13) with given bending line. The roller is displaceably born on a shaft (33). This has locking grooves (37) at defined positions. The roller has a corresponding locking mechanism (31). A peg (27) is provided to lock the roller on the shaft. The peg is pressed by a screw (26) into a notch (28) in the shaft. The turnable element also consists of a roller, which is held in two bearing plates (15). These are coupled to the spring steel sheet, and have a projection, which at the bottom projects over the diameter of the roller. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Transport von Bogen in eine bogenverarbeitende Maschine gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a device for transporting sheets into a sheet processing machine according to the preamble of the main claim.

Im Falle eines Einzelbogenanlegers wird der jeweils oberste Bogen eines Bogenstapels im Bereich der Vorderkante mittels einer Saugerstange erfaßt, vereinzelt, zwischen eine Takt- und eine Transportwalze gehoben und von dort über eine Bogenleiteinrichtung zu den Greifern eines Zylinders der bogenverarbeitenden Maschine geführt. Bei der Taktrolle handelt es sich entweder um eine Rolle mit einer durchgehenden Achse, die in definierten Abständen Gummiringe trägt, oder aber um einzelne Rollen, die starr auf einer getakteten Achse befestigt sind. Die Taktung selbst erfolgt derart, daß die Taktrolle auf der Transportwalze bei übernahme des Bogens von der Saugerstange aufsetzt und von der Transportwalze abgehoben wird, sobald die Greifer des Zylinders den Bogen erfaßt haben. Letzteres bedeutet, daß der Bogen von den Greifern frei mitgenommen werden kann.In the case of a single sheet feeder, the uppermost sheet of a sheet stack in the area of the leading edge is grasped by means of a suction rod, separated, lifted between a clock roller and a transport roller and from there guided to the grippers of a cylinder of the sheet processing machine via a sheet guiding device. The clock roller is either a roller with a continuous axis that carries rubber rings at defined intervals, or individual rollers that are rigidly attached to a clocked axis. The timing itself takes place in such a way that the timing roller touches the transport roller when the sheet is taken over by the suction rod and is lifted off the transport roller as soon as the grippers of the cylinder have gripped the sheet. The latter means that the bow can be taken freely by the grippers.

Um einen problemlosen Transport der Bogen zu dem Zylinder der bogenverarbeitenden Maschine zu gewährleisten, arbeiten die Taktrollen mit einer höheren Geschwindigkeit als die Druckmaschinengeschwindigkeit. Damit der Bogen die Greiferanschläge einholen kann und somit korrekt an den Greiferanschlägen ausgerichtet wird, ist diese erhöhte Geschwindigkeit erforderlich.In order to ensure problem-free transport of the sheets to the cylinder of the sheet processing machine, the clock rollers work at a higher speed than the printing press speed. This increased speed is required so that the sheet can catch up with the gripper stops and thus be correctly aligned with the gripper stops.

Für einen optimalen Bogentransport müssen die Saugergeschwindigkeit und die Geschwindigkeit der Transportwalzen optimal aufeinander abgestimmt sein. Eine optimale Bogenführung läßt sich nur erreichen, wenn die Sauger während der in Bogenförderrichtung ausgeführten Schwenkbewegung in den Arbeitsbereich der Taktrolle hineinschwenken können. Bei Verwendung einer durchgehenden Taktrolle ist dies nicht möglich, so daß hier von einer optimalen Abstimmung zwischen der Taktung der Sauger und der Taktung der Taktrolle abgesehen werden muß.For optimal sheet transport, the suction speed and the speed of the Transport rollers must be optimally coordinated. Optimal sheet guidance can only be achieved if the suction cups can pivot into the working area of the clock roller during the swiveling movement carried out in the sheet conveying direction. When using a continuous clock roll, this is not possible, so that an optimal coordination between the clocking of the suction cups and the clocking of the clock roll must be avoided.

In einer Druckmaschine werden Bogen unterschiedlicher Formate und unterschiedlicher Qualität verarbeitet. Um den verschiedenen Anforderungen zu genügen, muß eine Einstellung der Taktrolle zur Transportwalze möglich sein. Werden anstelle einer Rolle mit durchgehender Achse einzelne Taktrollen verwendet, so muß ein definiertes axiales Verstellen der einzelnen Taktrollen gefordert werden. nur auf diese Weise läßt sich die Papierzufuhr zu der bogenverarbeitenden Maschine mit der geforderten Geschwindigkeit und mit der erforderlichen Genauigkeit erreichen.Sheets of different formats and different quality are processed in a printing press. In order to meet the various requirements, it must be possible to adjust the clock roller to the transport roller. If individual clock rollers are used instead of a roller with a continuous axis, a defined axial adjustment of the individual clock rollers must be required. only in this way can the paper feed to the sheet processing machine be achieved with the required speed and with the required accuracy.

Die Entgegenhaltung FR-A 2 318 090 zeigt eine Vorrichtung zum Transport von Bogen in einer bogenverarbeitenden Maschine, welche auf einer getakteten Welle angeordnet ist und mit einem einstellbaren Anpreßdruck an eine Transportwelle andrückbar ist, wobei die Vorrichtung eine drehbar gelagerte Rolle aufweist, die höhenverstellbar und axial verschiebbar angeordnet ist.Document FR-A 2 318 090 shows a device for transporting sheets in a sheet-processing machine, which is arranged on a clocked shaft and can be pressed onto a transport shaft with an adjustable contact pressure, the device having a rotatably mounted roller which is adjustable in height and is axially displaceable.

Die Entgegenhaltung US-A 1,910,506 zeigt ebenfalls eine gattungsgemäße Vorrichtung zum Transport von Bogen zu einer bogenverarbeitenden Maschine, welche auf einer getakteten Welle angeordnet ist und mit einem einstellbaren Anpreßdruck an eine Transportrolle andrückbar ist, wobei die Vorrichtung eine drehbar gelagerte Rolle aufweist, die höhenverstellbar und axial verschiebbar angeordnet ist.Document US-A 1,910,506 also shows a generic device for transporting sheets to a sheet-processing machine, which is arranged on a clocked shaft and can be pressed onto an transport roller with an adjustable contact pressure, the device having a rotatably mounted roller that is height-adjustable and is axially displaceable.

Die Aufgabe der Erfindung besteht darin, eine Taktrolle vorzuschlagen, die die Zufuhr von Bogen unterschiedlichster Beschaffenheit und Formate zu der bogenverarbeitenden Maschine gewährleistet.The object of the invention is to propose a cycle roll, which ensures the supply of sheets of various types and formats to the sheet-processing machine.

Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The object is achieved by the characterizing features of claim 1.

Hierbei ist die Taktrolle ein drehbar gelagertes Element, das an einem höhenverstellbaren Element befestigt ist. Insbesondere handelt es sich bei dem drehbar gelagerten Element um ein Kugellager mit einer balligen Gummibeschichtung. Der Bogentransport läßt sich dadurch optimieren, daß die Beschichtung aus einem elastischen Material besteht, das einen hohen Reibwert aufweist; darüber hinaus sollte das Material verschleißfest und wenig farbannehmend sein.Here, the clock roller is a rotatably mounted element that is attached to a height-adjustable element. In particular, the rotatably mounted element is a ball bearing with a spherical rubber coating. The sheet transport can be optimized in that the coating consists of an elastic material that has a high coefficient of friction; in addition, the material should be wear-resistant and not very color-accepting.

Letzteres ist von großer Wichtigkeit, wenn bereits bedruckte Bögen transportiert werden sollen.The latter is of great importance if sheets already printed are to be transported.

Alle Taktrollen weisen eine definierte Nullstellung auf. Dies ist die Einstellung, bei der die ballige Gummibeschichtung der Rolle so zusammengedrückt wird, daß der Durchmesser der Rolle um einen gewissen Betrag abnimmt. Je nach zu bearbeitender Papiersorte wird das höhenverstellbare Element um definierte Beträge verstellt.All clock rollers have a defined zero position. This is the setting in which the spherical rubber coating of the roller is compressed so that the diameter of the roller decreases by a certain amount. Depending on the type of paper to be processed, the height-adjustable element is adjusted by defined amounts.

Eine besonders einfache und kostengünstige Konstruktion sieht vor, daß es sich bei dem höhenverstellbaren Element um ein Federblech mit einer vorgegebenen Biegelinie handelt. Die Biegelinie des Federbleches ist so berechnet, daß der Anpreßdruck innerhalb eines definierten Bereiches geändert werden kann. Insbesondere wird dieser Bereich so gewählt, daß alle zu bearbeitenden Papiersorten problemlos in die Druckmaschine hineintransportiert werden.A particularly simple and inexpensive construction provides that the height-adjustable element is a spring plate with a predetermined bending line. The bending line of the spring plate is calculated so that the contact pressure can be changed within a defined range. In particular, this area is selected so that all types of paper to be processed are easily transported into the printing press.

Gemäß einer alternativen Lösung besteht das höhenverstellbare Element aus zwei Hebeln, wobei die Taktrolle über einen Drehpunkt und eine Druckfeder auf die gewünschte Pressung einstellbar ist. Diese Ausführungsform ist als äquivalente Ausführungsform zu dem vorgespannten Federblech zu sehen.According to an alternative solution, the height-adjustable element consists of two levers, the clock roller being adjustable to the desired pressure via a pivot point and a compression spring. This embodiment is to be seen as an equivalent embodiment to the prestressed spring plate.

In einer bogenverarbeitenden Maschine, insbesondere in einer Druckmaschine, werden unterschiedlichste Formate bedruckt. Um diesen Anforderungen zu genügen, sind die einzelnen Taktrollen verschiebbar auf einer Welle gelagert. Die axiale Verstellung der Taktrollen kann von großem Vorteil sein, wenn bereits bedruckte Papiere erneut der bogenverarbeitenden Maschine zugeführt werden sollen. Um ein Beschädigen der bereits bedruckten Oberfläche zu vermeiden, können die einzelnen Taktrollen gemäß dieser vorteilhaften Weiterbildung der Erfindung auf druckfreie Bereiche eingestellt werden.A wide variety of formats are printed in a sheet-processing machine, in particular in a printing press. In order to meet these requirements, the individual clock rollers are slidably mounted on a shaft. The axial adjustment of the clock rollers can be of great advantage if papers that have already been printed are to be fed again to the sheet-processing machine. In order to avoid damaging the already printed surface, the individual clock rollers can be set to pressure-free areas according to this advantageous development of the invention.

Wie bereits an vorhergehender Stelle erwähnt, ist es erforderlich, daß die Sauger mit einer optimalen Geschwindigkeit frei durch den Arbeitsbereich der Taktrolle durchschwingen können. Damit keine Kollisionen mit den Saugern auftreten, ist gemäß einer vorteilhaften Weiterbildung der erfindungsgemäßen Taktrolle vorgesehen, daß an der Welle in definierten Stellungen Rasteinstiche vorgesehen sind; an jeder Taktrolle ist zumindest ein korrespondierender Einrastmechanismus vorgesehen. Im einfachsten Falle handelt es sich bei dem Einrastmechanismus um eine Kugelraste, die bei Verschieben der Taktrolle jeweils in der Position der Rasteinstiche einrastet.As already mentioned above, it is necessary for the suction devices to be able to swing freely through the working area of the clock roller at an optimal speed. So that there are no collisions with the suction cups, it is provided according to an advantageous development of the cycle roller according to the invention that catch recesses are provided on the shaft in defined positions; at least one corresponding latching mechanism is provided on each clock roller. In the simplest case, the latching mechanism is a ball latch, which latches in the position of the latching recesses when the clock roller is moved.

Die Taktrolle bzw. die Taktrollen sind während des Bogenzuführens fest mit der Achse verbunden. Gemäß einer vorteilhaften Ausführungsform ist als schnell lösbare Befestigungsvorrichtung für die Taktrolle folgendes vorgesehen: ein Stift wird in einer durch die Rasteinstiche definierten Stellung mittels einer Knebelschraube in eine Kerbe der Welle gedrückt.The cycle roll or cycle rolls are firmly connected to the axis during sheet feeding. According to an advantageous embodiment, the following is provided as a quickly detachable fastening device for the cycle roller: a pin is pressed into a notch in the shaft in a position defined by the catch recesses by means of a toggle screw.

Anstelle der zuvor beschriebenen Befestigungsvorrichtung läßt sich die Taktrolle auf der Welle auch über eine Schnellspannvorrichtung fixieren. Durch eine definierte Verstellung der Stellschraube lassen sich die Einstellungen der verschiedenen Taktrollen parallel und gleichmäßig zur Transportwalze durchführen. Dies ist besonders wichtig, da sich nur bei gleichem Anpreßdruck aller Taktrollen eine optimale Bogenführung erzielen läßt. An der Stellschraube ist beispielsweise eine Skala angebracht, die einem Drehwinkel der Stellschraube eine definierte Höhenverstellung der drehbar gelagerten Rolle zuordnet. Zur Fixierung der Stellschraube in einer gewünschten Stellung ist ein Rastelement bzw. eine Rastfeder vorgesehen.Instead of the fastening device described above, the cycle roller can also be fixed on the shaft by means of a quick-release device. Through a defined adjustment of the set screw, the settings of the various clock rollers can be carried out parallel and evenly to the transport roller. This is particularly important, since optimal sheet guidance can only be achieved with the same contact pressure of all cycle rolls. A scale is attached to the set screw, for example, which assigns a defined height adjustment of the rotatably mounted roller to an angle of rotation of the set screw. A locking element or a locking spring is provided to fix the set screw in a desired position.

Gemäß einer vorteilhaften Weiterbildung der erfindungsgemäßen Taktrolle ist vorgesehen, daß die beiden Lagerteile, in denen die drehbar gelagerte Rolle befestigt ist, so gestaltet sind, daß sie im unteren Bereich über die Gummibeschichtung hinausreichen. Durch diese Ausgestaltung wird eine Beschädigung der Gummibeschichtung verhindert, wenn die Taktrolle auf der Welle verschoben wird und dabei eventuell an den Kanten der Bogenleiteinrichtung anschlägt.According to an advantageous development of the cycle roller according to the invention, it is provided that the two bearing parts in which the rotatably mounted roller is fastened are designed such that they extend beyond the rubber coating in the lower region. This configuration prevents damage to the rubber coating if the clock roller is moved on the shaft and possibly strikes the edges of the sheet guiding device.

Besondere Probleme ergeben sich beim Transport von dünnen Papierbogen, da diese insbesondere bei hohen Zuführgeschwindigkeiten zum Knittern neigen. Um einen knitterfreien Transport sicherzustellen, wird gemäß einer vorteilhaften Weiterbildung der Erfindung vorgeschlagen, daß das drehbar gelagerte Element bzw. die Rolle schräg zur Papierlaufrichtung auf der Transportwalze aufsetzt. Hierdurch wird quer zur Bogenförderrichtung eine Kraft auf den Bogen ausgeübt, d. h. der Bogen wird nach außen gespannt. Rein konstruktiv läßt sich die Schrägstellung der Taktrolle dadurch erzielen, daß das Federblech schräg zu der Bögenförderebene eingestellt wird.Particular problems arise when transporting thin sheets of paper, since these tend to crease, particularly at high feed speeds. In order to ensure wrinkle-free transport, it is proposed according to an advantageous development of the invention that the rotatably mounted element or the roller is placed on the transport roller at an angle to the paper running direction. As a result, a force is exerted on the sheet transversely to the sheet conveying direction, i. H. the bow is stretched outwards. The inclination of the cycle roller can be achieved in a purely constructive manner by adjusting the spring plate obliquely to the sheet conveying plane.

Die Erfindung wird anhand der nachfolgenden Figuren näher erläutert.The invention is explained in more detail with reference to the following figures.

Es zeigt:

Fig. 1
einen Schnitt durch den Anlegebereich einer Druckmaschine mit einer Seitenansicht der erfindungsgemäßen Taktrolle und
Fig. 2
eine Draufsicht auf die Taktrollenanordnung gemaß Figur 1.
It shows:
Fig. 1
a section through the application area of a printing press with a side view of the clock roller according to the invention and
Fig. 2
a plan view of the clock roller arrangement according to Figure 1.

In Fig. 1 ist ein Schnitt durch den Anlegebereich einer Druckmaschine dargestellt; insbesondere zeigt die Fig. 1 eine Seitenansicht der erfindungsgemäßen Taktrolle 1. Der oberste Bogen 5 eines nicht gesondert dargestellten Bogenstapels wird von den Saugern 6, die auf einer Achse 7 angeordnet sind, Im Bereich der Vorderkante gefaßt, vereinzelt und durch eine Schwenkbewegung der Achse 7 In Bogenförderrichtung zwischen die Rolle 8 der Taktrolle 1 und die Transportwalze 9 geführt. Die Taktung der Achse 7 und die Taktung der Taktrolle 1 sind so aufeinander abgestimmt, daß der Sauger 6 den Bogen 5 spätestens im Umschwingpunkt losläßt. Die Rolle 8 rollt unter Preßdruck auf der Transportwalze 9 ab und schiebt den Bogen 5 durch die Bogenleiteinrichtung 2, die aus einer oberen Bogenleiteinrichtung 3 und einer unteren Bogenleiteinrichtung 4 besteht, gegen die Greiferanschläge 10. Um eine exakte Anlage des Bogens 5 an den Greiferanschlägen 10 zu erzielen, wird der Bogen 5 an die Greiferanschläge 10 transportiert und gebauscht, wobei er paßgenau an den Greiferanschlägen 10 ausgerichtet wird. Sobald die Greifer 11 die Bogenvorderkante erfaßt haben, wird die Taktrolle 1 von der Transportwalze 9 abgehoben. Nach dem Greiferschluß ist also der Bogen 5 völlig frei und kann mit Maschinengeschwindigkeit bewegt werden. Greifer 11 und Greiferanschläge 10 sind in bekannter Weise in einem Zylinder 12 der nicht gesondert dargestellten Druckmaschine angeordnet.1 shows a section through the application area of a printing press; in particular, Fig. 1 shows a Side view of the cycle roll 1 according to the invention. The uppermost sheet 5 of a sheet stack, not shown separately, is gripped by the suction devices 6, which are arranged on an axis 7, in the region of the leading edge, and by a pivoting movement of the axis 7 in the sheet conveying direction between the roll 8 Clock roller 1 and the transport roller 9 performed. The clocking of the axis 7 and the clocking of the clock roller 1 are coordinated with one another in such a way that the sucker 6 releases the bow 5 at the point of swing at the latest. The roller 8 rolls under pressure on the transport roller 9 and pushes the sheet 5 through the sheet guiding device 2, which consists of an upper sheet guiding device 3 and a lower sheet guiding device 4, against the gripper stops 10 To achieve, the sheet 5 is transported to the gripper stops 10 and bulked, whereby it is precisely aligned with the gripper stops 10. As soon as the grippers 11 have gripped the leading edge of the sheet, the clock roller 1 is lifted off the transport roller 9. After the gripper is closed, the sheet 5 is completely free and can be moved at machine speed. Grippers 11 and gripper stops 10 are arranged in a known manner in a cylinder 12 of the printing press, not shown separately.

Die Taktrolle 1 ist auf einer Welle 33 über zwei Lagerhebel 19 und einen Befestigungsmechanismus 26, 27, 28 verdrehfest befestigt. Die wesentlichen Bestandteile der Taktrolle 1 sind: ein vorgespanntes Federblech 13, ein Stellgewinde 14 und die in den Lagerblechen 15 drehbar gelagerte Rolle 8. Die Rolle 8 besteht aus einem Kugellager 16, das eine Gummibeschichtung 17 trägt. Um bei Kollisionen mit den Kanten der oberen Leiteinrichtung 3 eine Beschädigung der Gummibeschichtung 17 zu vermeiden, weist das Lagerblech 15 im unteren Bereich einen Vorsprung 18 auf. Das Federblech 13 ist im vorderen Bereich über zwei Schrauben 21 mit den Lagerhebeln 19 verbunden. Die Unterlage 22 gewährleistet eine definierte Biegelinie für das Federblech 13. Oberhalb des Mittelpunktes der Rolle 8 ist in dem Federblech 13 ein Stellgewinde 14 angebracht. über die Stellschraube 23, die eine Skala 24 trägt, kann die Rolle 8 um einen definierten Betrag in der Höhe verstellt werden.The clock roller 1 is fixed on a shaft 33 via two bearing levers 19 and a fastening mechanism 26, 27, 28 in a rotationally fixed manner. The essential components of the clock roller 1 are: a prestressed spring plate 13, an adjusting thread 14 and the roller 8 rotatably mounted in the bearing plates 15. The roller 8 consists of a ball bearing 16 which has a rubber coating 17. In order to avoid damage to the rubber coating 17 in the event of collisions with the edges of the upper guide device 3, the bearing plate 15 has a projection 18 in the lower region. The spring plate 13 is in the front area via two screws 21 connected to the bearing levers 19. The base 22 ensures a defined bending line for the spring plate 13. Above the center of the roller 8, an adjusting thread 14 is attached in the spring plate 13. The roller 8 can be adjusted in height by a defined amount via the adjusting screw 23, which carries a scale 24.

Wie bereits an vorhergehender Stelle erwähnt, wird die Taktrolle 1 in einer Rastposition der Welle 33 über einen Stellmechanismus fixiert. Dieser Stellmechanismus besteht aus einer in der Achse 33 angebrachten Kerbe 28 und einem Zylinderstift 27, der über die Knebelschraube 26 in die Kerbe 28 hineingedrückt wird. Das Blechteil 29, das über die Kugelraste 31 und die Mutter 30 an den Lagerhebeln 19 befestigt ist, sorgt dafür, daß der Zylinderstift 27 während des Verstellvorganges der Taktrolle 1 nicht seitlich herausfällt.As already mentioned at the previous point, the clock roller 1 is fixed in a locking position of the shaft 33 via an adjusting mechanism. This adjusting mechanism consists of a notch 28 made in the axis 33 and a cylindrical pin 27 which is pressed into the notch 28 via the toggle screw 26. The sheet metal part 29, which is fastened to the bearing levers 19 via the ball catch 31 and the nut 30, ensures that the cylinder pin 27 does not fall out laterally during the adjustment process of the clock roller 1.

Zu Beginn des Druckprozesses wird die Taktrolle 1 auf die jeweils zu bearbeitende Papiersorte eingestellt, d. h. der Anpreßdruck zwischen der Gummibeschichtung 17 der Rolle 8 und der Transportwalze 9 wird in Abhängigkeit von der Dicke der zu transportierenden Bogen 5 gewählt. Die jeweils optimale Einstellung ist problemlos anhand der Skala 24 auf der Stellschraube 23 auffindbar. Die Taktung der Taktrolle 1, also das Abstellen und das Andrücken der Rolle 8 an die Transportwalze 9, erfolgt in bekannter Weise über eine Kurvensteuerung. Die Welle 33 ist hierzu starr mit einem Hebel 34 gekoppelt. Im unteren Bereich des Hebels 34 ist ein Rolle 48 angebracht, die auf einer Kurve 36 abrollt.At the beginning of the printing process, the clock roller 1 is set to the type of paper to be processed, i. H. the contact pressure between the rubber coating 17 of the roller 8 and the transport roller 9 is selected depending on the thickness of the sheet 5 to be transported. The optimum setting in each case can easily be found using the scale 24 on the adjusting screw 23. The clocking of the clock roller 1, that is to say the setting and pressing of the roller 8 against the transport roller 9, is carried out in a known manner via a cam control. For this purpose, the shaft 33 is rigidly coupled to a lever 34. In the lower region of the lever 34, a roller 48 is attached, which rolls on a curve 36.

Fig. 2 zeigt eine Draufsicht auf eine Anordnung der erfindungsgemäßen Taktrollen 1.2 shows a plan view of an arrangement of the clock rollers 1 according to the invention.

Die untere Bogenleiteinrichtung 4 ist über Befestigungsmittel mit den Seitenteilen 38, 39 verbunden. Auf diese untere Bogenleiteinrichtung 4 ist die obere Bogenleiteinrichtung 3 aufgeschraubt. Um ein problemloses Entfernen der oberen Bogenleiteinrichtung 3 zu Reinigungszwecken zu ermöglichen, sind die Schrauben 49 als Rändelschrauben ausgebildet. Die obere Bogenleiteinrichtung 3 weist sowohl in ihrem vorderen Bereich als auch in ihrem hinteren Bereich Aussparungen 40, 41 auf. In die Aussparungen 41 im vorderen Bereich der oberen Bogenleiteinrichtung 3 greifen die Greifer 11 ein. Die Ausschnitte 40 im hinteren Bereich der oberen Bogenleiteinrichtung 3 schaffen Platz für die Rolle 8 der Taktrolle 1. Vorteilhafterweise sind die Kanten der Ausschnitte 40 abgeschrägt; durch diese Maßnahme wird die Gefahr verringert, daß die Bogen 5 an den Kanten hängen bleiben.The lower sheet guiding device 4 is connected to the side parts 38, 39 by means of fastening means. On this lower one Sheet guiding device 4, the upper sheet guiding device 3 is screwed on. In order to enable the upper sheet guiding device 3 to be removed easily for cleaning purposes, the screws 49 are designed as knurled screws. The upper sheet guide device 3 has cutouts 40, 41 both in its front area and in its rear area. The grippers 11 engage in the cutouts 41 in the front region of the upper sheet guiding device 3. The cutouts 40 in the rear area of the upper sheet guiding device 3 create space for the roll 8 of the cycle roll 1. The edges of the cutouts 40 are advantageously beveled; this measure reduces the risk of the sheets 5 getting caught on the edges.

Wie bereits in Zusammenhang mit der Fig. 1 beschrieben, sind die Taktrollen 1 lösbar auf der Achse 33 befestigt. Eine Fixierung der Taktrollen 1 erfolgt jeweils in den durch die Rasteinstiche 37 auf der Achse 33 definierten Stellungen. Diese Stellungen sind so gewählt, daß sie auf Lücke mit den Saugern 6 liegen, die ihrerseits auf einer separaten Welle 7 befestigt sind. Durch die spezielle Anordnung wird ein Kollidieren der Sauger 6 mit der Rolle 8 der Taktrolle 1 in jedem Betriebszustand vermieden.As already described in connection with FIG. 1, the clock rollers 1 are detachably fastened on the axis 33. The clock rollers 1 are each fixed in the positions defined by the notches 37 on the axis 33. These positions are chosen so that they lie on the gap with the suction cups 6, which in turn are attached to a separate shaft 7. The special arrangement prevents the suckers 6 from colliding with the roller 8 of the clock roller 1 in any operating state.

Zur Verstellung der Taktrollen auf der Achse 33 wird die Knebelschraube 26 gelöst; anschließend wird die Taktrolle 1 durch leichtes Verschwenken im hinteren Bereich so angehoben, daß sie nicht mit Teilen der oberen Bogenleiteinrichtung 3 kollidiert. Die Verschwenkung der Taktrolle 1 wird durch eine Nase 32 im vorderen Bereich des Lagerhebels 19 begrenzt.To adjust the clock rollers on the axis 33, the toggle screw 26 is loosened; the clock roller 1 is then raised by slight pivoting in the rear area so that it does not collide with parts of the upper sheet guide device 3. The pivoting of the clock roller 1 is limited by a nose 32 in the front region of the bearing lever 19.

Der Zapfen der Welle 33 ist auf der Bedienerseite in dem Seitenteil 38 gelagert. Auf der Antriebsseite ist die Achse 33 durch das Seitenteil 39 geführt und in einem Lagerteil 42 gelagert. Eine Verschiebung der Achse 33 in axiale Richtung wird durch den Anschlag 45 und durch den Stellring 47 verhindert. Der Zapfen der Welle 33 ist auf der Antriebsseite starr mit einem Hebel 34 verbunden. Im unteren Bereich des Hebels 34 ist eine Kurvenrolle 48 angeschraubt. über die Feder 44 wird der Hebel 34 an die Kurve 36 angestellt.The pin of the shaft 33 is mounted on the operator side in the side part 38. On the drive side, the axis 33 is guided through the side part 39 and mounted in a bearing part 42. A displacement of the axis 33 in axial direction is prevented by the stop 45 and by the adjusting ring 47. The pin of the shaft 33 is rigidly connected to a lever 34 on the drive side. In the lower region of the lever 34, a cam roller 48 is screwed on. The lever 34 is set against the curve 36 via the spring 44.

TeilelisteParts list

11
TaktrolleMeasure roll
22nd
BogenleiteinrichtungSheet guiding device
33rd
obere Bogenleiteinrichtungupper sheet guide
44th
untere Bogenleiteinrichtunglower sheet guide
55
Bogenbow
66
SaugerMammal
77
Achseaxis
88th
Rollerole
99
TransportwalzeTransport roller
1010th
GreiferanschlagGripper stop
1111
GreiferGripper
1212th
Zylindercylinder
1313
FederblechSpring plate
1414
StellgewindeSetting thread
1515
LagerblechBearing plate
1616
Kugellagerball-bearing
1717th
GummibeschichtungRubber coating
1818th
Vorsprung (Nase)Projection (nose)
1919th
LagerhebelBearing lever
2020th
Schraubescrew
2121
Schraubescrew
2222
Unterlagedocument
2323
StellschraubeSet screw
2424th
Skalascale
2525th
RastfederDetent spring
2626
KnebelschraubeToggle screw
2727
ZylinderstiftDowel pin
2828
Kerbescore
2929
BlechteilSheet metal part
3030th
Muttermother
3131
KugelrasteBall catch
3232
Nasenose
3333
Achseaxis
3434
Hebellever
3535
Bolzenbolt
3636
KurveCurve
3737
RasteinstichRecess
3838
SeitenteilSide panel
3939
SeitenteilSide panel
4040
AusschnittNeckline
4141
AussparungRecess
4242
LagerteilBearing part
4343
FederbolzenSpring bolt
4444
Federfeather
4545
Anschlagattack
4646
Scheibedisc
4747
StellringCollar
4848
KurvenrolleCam roller
4949
RändelschraubenThumbscrews

Claims (7)

  1. Device for conveying sheets (5) into a sheet-processing machine, which device has at least one rotatably mounted roller (8) which is arranged on a clocked shaft (33) and can be pressed against a conveying cylinder (9) with an adjustable contact pressure, the roller (8) being arranged at the end of a resilient element (13, 19) so as to be height-adjustable and axially displaceable, characterized in that the shaft (33) has catch incisions (37) at defined positions, and in that a corresponding catch mechanism (31) is provided on the device.
  2. Device according to Claim 1, characterized in that the device (1) is designed in such a way that the rotatably mounted roller (8) is seated on the conveying cylinder (9) at an inclination to the sheet conveying direction.
  3. Device according to Claim 1, characterized in that the resilient element (13, 19) is a spring metal plate (13) with a predetermined bending line.
  4. Device according to Claim 1, characterized in that the resilient element (13, 19) comprises two bearing levers (19) which are connected to one another resiliently, the resilient element being rotatably mounted.
  5. Device according to one of the preceding claims, characterized in that a pin (27) is provided on the shaft (33) as a fastening device of the device, which pin is pressed into a notch (28) on the shaft (33) by means of a screw (26).
  6. Device according to one of the preceding claims, characterized in that a quick-acting clamping device is provided on the shaft (33) as a fastening device of the device.
  7. Device according to one of the preceding claims, characterized in that the roller (8) is rotatably mounted in two bearing plates (15), in that the two bearing plates (15), bearing the roller (8) and coupled to the spring metal plate (13), have a projection, and in that the latter protrudes in the lower region beyond the diameter of the roller (8).
EP95104641A 1994-04-26 1995-03-29 Intermittent roller for transporting sheets in a printing machine Expired - Lifetime EP0679593B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4414445A DE4414445A1 (en) 1994-04-26 1994-04-26 Tacting roll for transporting sheets into a sheet processing machine
DE4414445 1994-04-26

Publications (2)

Publication Number Publication Date
EP0679593A1 EP0679593A1 (en) 1995-11-02
EP0679593B1 true EP0679593B1 (en) 1997-08-13

Family

ID=6516414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104641A Expired - Lifetime EP0679593B1 (en) 1994-04-26 1995-03-29 Intermittent roller for transporting sheets in a printing machine

Country Status (5)

Country Link
US (1) US5641159A (en)
EP (1) EP0679593B1 (en)
JP (1) JP3655663B2 (en)
AT (1) ATE156775T1 (en)
DE (2) DE4414445A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7334790B2 (en) * 2004-10-29 2008-02-26 Heidelberger Druckmaschinen Ag Apparatus for conveying sheets through a rotary press
US7840401B2 (en) * 2005-10-24 2010-11-23 Lg Electronics Inc. Removing time delays in signal paths
DE102007005404A1 (en) * 2007-02-03 2008-08-07 Man Roland Druckmaschinen Ag Sheet guiding device for managing clocked sheet transfer in area of feeder of e.g. sheet-fed printing press, has sensor device provided for generating sensor signal indicative with respect to contact pressure applied on sheet

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1910506A (en) * 1930-02-21 1933-05-23 Spiess Georg Method of and means for feeding sheets to machines
DE545921C (en) * 1930-04-02 1932-03-07 E H Georg Spiess Dr Ing Device for separating and feeding individual sheets from a stack to a printing press, folding machine or the like.
DE830655C (en) * 1950-09-15 1952-02-07 Walter Fischer Control of the swab rolls on sheet feeders for printing machines
US3210074A (en) * 1962-04-30 1965-10-05 Fairchild Camera Instr Co Pullout feed roller for printing press
JPS4941642B1 (en) * 1968-12-25 1974-11-11
US3993302A (en) * 1970-07-30 1976-11-23 Miller Printing Machinery Co. Apparatus for registering and feeding sheets to a sheet fed printing press
CA940148A (en) * 1970-07-30 1974-01-15 Miller Printing Machinery Co. Apparatus for registering and feeding sheets to a sheet fed printing press
DD101641A1 (en) * 1973-02-19 1973-11-12
DD123801A1 (en) * 1975-07-15 1977-01-19
US4163550A (en) * 1977-08-10 1979-08-07 Am International, Inc. Pressure roller assembly
JPS58181536U (en) * 1982-05-31 1983-12-03 リョービ株式会社 Double-sided printing machine paper feed device
DE3731216A1 (en) * 1987-09-17 1989-04-13 Koenig & Bauer Ag DEVICE FOR FEEDING SHEETS TO A SHEET PROCESSING MACHINE, IN PARTICULAR PRINTING MACHINE
US4951062A (en) * 1988-12-12 1990-08-21 Page Jeffrey L Paper transport mechanism
US4979730A (en) * 1989-11-14 1990-12-25 Pitney Bowes Inc. Sheet drive system having an encoder apparatus

Also Published As

Publication number Publication date
EP0679593A1 (en) 1995-11-02
JPH07309473A (en) 1995-11-28
JP3655663B2 (en) 2005-06-02
DE59500495D1 (en) 1997-09-18
DE4414445A1 (en) 1995-11-09
ATE156775T1 (en) 1997-08-15
US5641159A (en) 1997-06-24

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