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EP1148008A1 - Gripper shaft for clamping printed products - Google Patents

Gripper shaft for clamping printed products Download PDF

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Publication number
EP1148008A1
EP1148008A1 EP00810350A EP00810350A EP1148008A1 EP 1148008 A1 EP1148008 A1 EP 1148008A1 EP 00810350 A EP00810350 A EP 00810350A EP 00810350 A EP00810350 A EP 00810350A EP 1148008 A1 EP1148008 A1 EP 1148008A1
Authority
EP
European Patent Office
Prior art keywords
gripper
shaft
drum
grippers
drive
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
EP00810350A
Other languages
German (de)
French (fr)
Other versions
EP1148008B1 (en
Inventor
Günther Silberbauer
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.)
Grapha Holding AG
Original Assignee
Grapha Holding AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Grapha Holding AG filed Critical Grapha Holding AG
Priority to EP00810350A priority Critical patent/EP1148008B1/en
Priority to DE50003100T priority patent/DE50003100D1/en
Priority to JP2001119946A priority patent/JP4926333B2/en
Priority to US09/838,559 priority patent/US6547240B2/en
Publication of EP1148008A1 publication Critical patent/EP1148008A1/en
Application granted granted Critical
Publication of EP1148008B1 publication Critical patent/EP1148008B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/12—Revolving grippers, e.g. mounted on arms, frames or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/50—Machine elements
    • B65H2402/54—Springs, e.g. helical or leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/50—Driving mechanisms
    • B65H2403/51—Cam mechanisms
    • B65H2403/512—Cam mechanisms involving radial plate cam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/10—Ensuring correct operation
    • B65H2601/12—Compensating; Taking-up
    • B65H2601/122—Play

Definitions

  • the invention relates to a gripper drum with a gripper shaft according to the preamble of claim 1.
  • Gripper shafts of the type mentioned are used in particular to pull sheets or inserts from a stack at a feeder and to deliver them to an opening device.
  • a feeder with two such gripper shafts is known for example from the applicant's CH 652 103 A5.
  • the gripper shaft is rotated about its longitudinal axis in order to grasp the sheets.
  • grippers arranged on the gripper shaft each grip an arc on the underside of the stack and press this against a support of the gripper drum.
  • a drive with a spur gear and a closed curve is provided for rotating the gripper shaft.
  • the gripper shaft is accelerated with each closing process and through the play on the control curve and the gearing changed the direction of the spur gear. After this The turning point would like to continue rotating the shaft and that Play is moved to the opposite outside of the curve. Now hit the grippers on the support of the gripper drum on, the wave springs back within the game.
  • the grippers in particular remove thin printed sheets released briefly and can no longer be grasped properly become. As a result of this brief release, there is the risk of printing sheets being pulled off at an angle. In addition can cause printed sheets to slip off the grippers Processing interruption.
  • the known gripper shaft prone to failure and as a result Disruptions can significantly reduce the net performance.
  • the invention has for its object a gripper drum to create the type mentioned, which has the disadvantages mentioned avoids and which is nevertheless inexpensive to manufacture.
  • the game is at the toothing and the closed curve by means of the compensation spring canceled.
  • a closing movement a Counter torque of 6 Nm, for example.
  • This will a jumping of the gripper is avoided and it can be a gentle one Guaranteed closing movement for gripping the printed products become.
  • the printed sheets can thus be securely held in position on the Peeled from the bottom of a stack.
  • This also applies to a stack with a very high stack pressure, in which one a correspondingly high gripper force is required.
  • the safe one Gripping process enables a higher net performance and accordingly less interference.
  • the gripper drum according to the invention is particularly suitable for an investor. However, other applications are also conceivable where a printed sheet or other sheet by means of a Closing movement should be grasped.
  • the compensation spring with every closing movement by one Swing lever is tensioned, which is rotatably connected to the shaft body the gripper shaft is connected.
  • the compensation spring is preferably with the gripper shaft and the shaft of the gripper drum connected. When the gripper shaft is turned, the compensation spring automatically tensioned. The tension is easier Way by changing the position of the pivot lever adjustable on the gripper shaft.
  • Figures 1 and 2 show a gripper drum 1, which in one otherwise not shown feeder is arranged and around a Shaft 7 is driven.
  • the gripper drum 1 is with flange stops 8, of which only one is shown here a machine frame not shown here.
  • On the Several gripper disks 22 to 24 are arranged on shaft 7 which at a distance from the shaft 7 a limited rotatable gripper shaft 2 is stored.
  • the gripper shaft 2 has a shaft body 26 on which several grippers 3 are rotatably attached. In Figures 1 and 2 only two of these grippers 3 are shown here.
  • the Drive is designed so that the shaft body 26 with the Grippers 3 with each rotation of the gripper drum 1 Closing movement and an opening movement.
  • the grippers 3 in the rest position and in the figure 2 shown in the working position.
  • the grippers 3 from the position shown in FIG the position shown in Figure 2 moves.
  • the movement takes place by rotating the shaft body 26 about its longitudinal axis.
  • the shaft body 26 is turned on known tensioned by means of a torsion spring, the is connected to the shaft body 26.
  • Torsion springs known.
  • a compensation spring is located between the shaft body 26 and the shaft 7 9 arranged, which has two spring elements 10, which are spaced parallel to each other and each on are attached at one end to an axle 19 or 30.
  • the attachment takes place with mounting plates 17, each with a screw 18 on the axis 19 and 30 are clamped.
  • the axis 19 is rotatable in a bearing 20 of a holding plate 15 stored and this plate 15 is by means of a clamping part 16 and clamping screws 14 rotatably connected to the shaft 7.
  • the axis 30 sits in a pivot bearing 21 and this is also non-rotatably connected with two pivot levers 11, which with Clamping parts 12 and clamping screws 13 firmly with the shaft body 26 are connected.
  • the Cancellation of the game has the consequence that the gripper 3 at The closing movement does not spring back from the supports 28 and so that a gentle closing is guaranteed. Because the grabs 3 do not spring back, the sheets 29 can be held more securely become.
  • the suitable counter moment can be determined by tests become. The counter moment can be changed in a simple manner are released by the pivot lever 11 and on the shaft body 26 are rotated.
  • the spring elements 10 are spiral springs here, it is clear to the person skilled in the art that the spring elements could also be different. It is essential Development of a counter-moment during a closing movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Discharge By Other Means (AREA)

Abstract

The gripper drum has a shaft (26) which is moved over a controlled path by a drive and carries grippers (3) for printed material. A tensioning device is fitted which lifts the drive spindle between the controlled path and the grippers.

Description

Die Erfindung betrifft eine Greifertrommel mit einer Greiferwelle nach dem Oberbegriff des Anspruchs 1.
Greiferwellen der genannten Art dienen insbesondere dazu, bei einem Anleger Bogen oder Beilagen von einem Stapel abzuziehen und an eine Öffnungsvorrichtung abzugeben. Ein Anleger mit zwei solchen Greiferwellen ist beispielsweise aus der CH 652 103 A5 der Anmelderin bekannt. Um die Bogen zu fassen, wird die Greiferwelle um ihre Längsachse gedreht. An der Greiferwelle angeordnete Greifer erfassen bei einer solchen Drehbewegung jeweils einen Bogen an der Stapelunterseite und pressen diesen gegen eine Auflage der Greifertrommel. Zum Drehen der Greiferwelle ist beispielsweise ein Antrieb mit einem Stirnradgetriebe und einer geschlossenen Kurve vorgesehen.The invention relates to a gripper drum with a gripper shaft according to the preamble of claim 1.
Gripper shafts of the type mentioned are used in particular to pull sheets or inserts from a stack at a feeder and to deliver them to an opening device. A feeder with two such gripper shafts is known for example from the applicant's CH 652 103 A5. The gripper shaft is rotated about its longitudinal axis in order to grasp the sheets. With such a rotary movement, grippers arranged on the gripper shaft each grip an arc on the underside of the stack and press this against a support of the gripper drum. For example, a drive with a spur gear and a closed curve is provided for rotating the gripper shaft.

Bei jedem Schliessvorgang wird die Greiferwelle beschleunigt und durch das Spiel an der Steuerkurve sowie der Verzahnung des Stirnradgetriebes in ihrer Richtung geändert. Nach dem Wendepunkt möchte die Welle jeweils weiter drehen und das Spiel wird auf die gegenüberliegende Kurvenaussenseite verlegt. Schlagen nun die Greifer auf die Auflage der Greifertrommel auf, so federt die Welle innerhalb des Spiels zurück. Vor allem dünne Druckbogen werden dadurch von den Greifern kurzzeitig losgelassen und können nicht mehr richtig nachgegriffen werden. Als Folge dieses kurzzeitigen Loslassens besteht die Gefahr, dass Druckbogen schräg abgezogen werden. Zudem können Druckbogen von den Greifern abrutschen und verursachen Verarbeitungsunterbruch. Vor allem bei hohen Leistungen ist die bekannte Greiferwelle störanfällig und als Folge solcher Störungen kann die Nettoleistung wesentlich abnehmen.The gripper shaft is accelerated with each closing process and through the play on the control curve and the gearing changed the direction of the spur gear. After this The turning point would like to continue rotating the shaft and that Play is moved to the opposite outside of the curve. Now hit the grippers on the support of the gripper drum on, the wave springs back within the game. The grippers in particular remove thin printed sheets released briefly and can no longer be grasped properly become. As a result of this brief release, there is the risk of printing sheets being pulled off at an angle. In addition can cause printed sheets to slip off the grippers Processing interruption. Especially with high performance is the known gripper shaft prone to failure and as a result Disruptions can significantly reduce the net performance.

Der Erfindung liegt die Aufgabe zugrunde, eine Greifertrommel der genannten Art zu schaffen, welche die genannten Nachteile vermeidet und die dennoch kostengünstig herstellbar ist.The invention has for its object a gripper drum to create the type mentioned, which has the disadvantages mentioned avoids and which is nevertheless inexpensive to manufacture.

Die Aufgabe ist bei einer Greifertrommel gemäss Anspruch 1 gelöst.The object is achieved with a gripper drum according to claim 1.

Bei der erfindungsgemässen Greifertrommel wird das Spiel bei der Verzahnung und der geschlossenen Kurve mittels der Kompensationsfeder aufgehoben. Bei einer Schliessbewegung wird ein Gegenmoment von beispielsweise 6 Nm aufgebaut. Dadurch wird ein Springen der Greifer vermieden und es kann eine sanfte Schliessbewegung zum Fassen der Druckprodukte gewährleistet werden. Die Druckbogen können somit sicher lagestabil an der Unterseite eines Stapels abgezogen werden. Dies gilt auch bei einem Stapel mit einem sehr hohen Stapeldruck, bei dem eine entsprechend hohe Greiferkraft erforderlich ist. Der sichere Greifvorgang ermöglicht eine höhere Nettoleistung und entsprechend weniger Störungen.With the gripper drum according to the invention, the game is at the toothing and the closed curve by means of the compensation spring canceled. With a closing movement a Counter torque of 6 Nm, for example. This will a jumping of the gripper is avoided and it can be a gentle one Guaranteed closing movement for gripping the printed products become. The printed sheets can thus be securely held in position on the Peeled from the bottom of a stack. This also applies to a stack with a very high stack pressure, in which one a correspondingly high gripper force is required. The safe one Gripping process enables a higher net performance and accordingly less interference.

Die erfindungsgemässe Greifertrommel eignet sich besonders für einen Anleger. Es sind jedoch auch andere Anwendungen denkbar, bei denen ein Druckbogen oder ein sonstiger Bogen mittels einer Schliessbewegung gefasst werden soll.The gripper drum according to the invention is particularly suitable for an investor. However, other applications are also conceivable where a printed sheet or other sheet by means of a Closing movement should be grasped.

Eine besonders einfache konstruktive Ausführung ergibt sich dann, wenn gemäss einer Weiterbildung der Erfindung die Kompensationsfeder bei jeder Schliessbewegung durch einen Schwenkhebel gespannt wird, der drehfest mit dem Wellenkörper der Greiferwelle verbunden ist. Die Kompensationsfeder ist vorzugsweise mit der Greiferwelle und der Welle der Greifertrommel verbunden. Beim Drehen der Greiferwelle wird die Kompensationsfeder selbstätig gespannt. Die Spannung ist in einfacher Weise durch eine Veränderung der Position des Schwenkhebels auf der Greiferwelle einstellbar.A particularly simple structural design results when, according to a further development of the invention, the compensation spring with every closing movement by one Swing lever is tensioned, which is rotatably connected to the shaft body the gripper shaft is connected. The compensation spring is preferably with the gripper shaft and the shaft of the gripper drum connected. When the gripper shaft is turned, the compensation spring automatically tensioned. The tension is easier Way by changing the position of the pivot lever adjustable on the gripper shaft.

Weitere vorteilhafte Merkmale ergeben sich aus den abhängigen Patentansprüchen der nachfolgenden Beschreibung sowie der Zeichnung. Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
eine Teilansicht einer erfindungsgemässen Greifertrommel mit einer Greiferwelle, wobei die Greiferwelle in der Ruhestellung ist,
Fig. 2
eine Greifertrommel gemäss Figur 1, wobei die Greiferwelle jedoch in der Arbeitsstellung ist,
Fig. 3
eine räumliche Ansicht einer Kompensationsfeder.
Further advantageous features result from the dependent claims of the following description and the drawing. An embodiment of the invention is explained below with reference to the drawing. Show it:
Fig. 1
2 shows a partial view of a gripper drum according to the invention with a gripper shaft, the gripper shaft being in the rest position,
Fig. 2
a gripper drum according to Figure 1, but the gripper shaft is in the working position,
Fig. 3
a spatial view of a compensation spring.

Die Figuren 1 und 2 zeigen eine Greifertrommel 1, die in einem ansonst nicht gezeigten Anleger angeordnet ist und um eine Welle 7 angetrieben ist. Die Greifertrommel 1 ist mit Flanschlagern 8, von denen hier lediglich einer gezeigt ist, an einem hier nicht gezeigten Maschinengestell gelagert. Auf der Welle 7 sind mehrere Greiferscheiben 22 bis 24 angeordnet, auf denen im Abstand zur Welle 7 eine begrenzt drehbare Greiferwelle 2 gelagert ist.Figures 1 and 2 show a gripper drum 1, which in one otherwise not shown feeder is arranged and around a Shaft 7 is driven. The gripper drum 1 is with flange stops 8, of which only one is shown here a machine frame not shown here. On the Several gripper disks 22 to 24 are arranged on shaft 7 which at a distance from the shaft 7 a limited rotatable gripper shaft 2 is stored.

Die Greiferwelle 2 weist einen Wellenkörper 26 auf, auf dem mehrere Greifer 3 drehfest befestigt sind. In den Figuren 1 und 2 sind hier lediglich zwei dieser Greifer 3 gezeigt. Der Antrieb ist so ausgebildet, dass der Wellenkörper 26 mit den Greifern 3 bei jeder Umdrehung der Greifertrommel 1 eine Schliessbewegung sowie eine Oeffnungsbewegung ausübt. In der Figur 1 sind die Greifer 3 in der Ruhestellung und in der Figur 2 in der Arbeitsstellung gezeigt. Bei der Schliessbewegung werden die Greifer 3 von der in Figur 1 gezeigten Stellung in die in Figur 2 gezeigte Stellung bewegt. Die Bewegung erfolgt durch eine Drehbewegung des Wellenkörpers 26 um seine Längsachse. Beim Schliessvorgang wird der Wellenkörper 26 in an sich bekannter Weise mittels einer Torsionsfeder gespannt, die mit dem Wellenkörper 26 verbunden ist. Dem Fachmann sind solche Torsionsfedern bekannt.The gripper shaft 2 has a shaft body 26 on which several grippers 3 are rotatably attached. In Figures 1 and 2 only two of these grippers 3 are shown here. The Drive is designed so that the shaft body 26 with the Grippers 3 with each rotation of the gripper drum 1 Closing movement and an opening movement. In the Figure 1 are the grippers 3 in the rest position and in the figure 2 shown in the working position. During the closing movement the grippers 3 from the position shown in FIG the position shown in Figure 2 moves. The movement takes place by rotating the shaft body 26 about its longitudinal axis. During the closing process, the shaft body 26 is turned on known tensioned by means of a torsion spring, the is connected to the shaft body 26. Those skilled in the art are such Torsion springs known.

Bei einer Schliessbewegung werden die Greifer 3 gemäss Figur 2 jeweils an Auflagen 28 angepresst, und hierbei wird ein Falz eines in Figur 2 angedeuteten Druckbogens 29 festgehalten. Ein solcher festgehaltener Druckbogen 29 kann durch die Drehbewegung der Greifertrommel 1 in Richtung des Pfeils 25 von einem hier nicht gezeigten Stapel abgezogen werden.During a closing movement, the grippers 3 according to FIG. 2 each pressed against pads 28, and this is a fold of a printed sheet 29 indicated in FIG. 2. On such fixed sheet 29 can by the rotational movement the gripper drum 1 in the direction of arrow 25 from one stack not shown here are subtracted.

Zwischen dem Wellenkörper 26 und der Welle 7 ist eine Kompensationsfeder 9 angeordnet, die zwei Federelemente 10 aufweist, die im Abstand zueinander parallel angeordnet und jeweils an einem Ende an einer Achse 19 bzw. 30 befestigt sind. Die Befestigung erfolgt mit Befestigungsplatten 17, die jeweils mit einer Schraube 18 an der Achse 19 bzw. 30 festgeklemmt sind. Die Achse 19 ist in einem Lager 20 einer Halteplatte 15 drehbar gelagert und diese Platte 15 ist mittels eines Klemmteils 16 sowie Klemmschrauben 14 drehfest mit der Welle 7 verbunden. Die Achse 30 sitzt in einem Drehlager 21 und dieses ist ebenfalls drehfest mit zwei Schwenkhebeln 11 verbunden, die mit Klemmteilen 12 und Klemmschrauben 13 fest mit dem Wellenkörper 26 verbunden sind. Diese beiden Schwenkhebel 11 sind so ausgebildet, dass die beiden Federelemente 10 bei einer Schliessbewegung des Greifers 3 gespannt werden. Diese Drehbewegung ist in Figur 1 mit dem Pfeil 31 angedeutet. Die hierbei erzeugte Spannung der beiden Federelemente 10 wirkt über die Schwenkhebel 11 als Drehmoment auf den Wellenkörper 26 und dieses Drehmoment ist ein Gegenmoment zum Drehmoment, das die Greifer 3 an die Auflagen 28 anpresst. Der Wert dieses Gegenmomentes beträgt beispielsweise 6 Nm. Das Drehmoment, welches die Greifer 3 anpresst, ist wesentlich grösser, beispielsweise grösser als 10 Nm. Durch dieses Gegenmoment wird ein Spiel im Antrieb 4 bzw. im Getriebe des Antriebes aufgehoben. Ein Spiel kann zwischen einer hier nicht gezeigten geschlossenen Antriebskurve und einer in dieser Kurve geführten Rolle bestehen. Die Aufhebung des Spiels hat zur Folge, dass die Greifer 3 bei der Schliessbewegung von den Auflagen 28 nicht zurückspringen und damit ein sanftes Schliessen gewährleistet ist. Da die Greifer 3 nicht zurückspringen, können die Bogen 29 sicherer gefasst werden. Das geeignete Gegenmoment kann durch Versuche ermittelt werden. Das Gegenmoment kann in einfacher Weise verändert werden, indem die Schwenkhebel 11 gelöst und auf dem Wellenkörper 26 verdreht werden. Die Federelemente 10 sind hier Spiralfedern, für den Fachmann ist aber klar, dass die Federelemente auch anders ausgebildet sein könnten. Wesentlich ist der Aufbau eines Gegenmomentes bei einer Schliessbewegung.A compensation spring is located between the shaft body 26 and the shaft 7 9 arranged, which has two spring elements 10, which are spaced parallel to each other and each on are attached at one end to an axle 19 or 30. The attachment takes place with mounting plates 17, each with a screw 18 on the axis 19 and 30 are clamped. The axis 19 is rotatable in a bearing 20 of a holding plate 15 stored and this plate 15 is by means of a clamping part 16 and clamping screws 14 rotatably connected to the shaft 7. The axis 30 sits in a pivot bearing 21 and this is also non-rotatably connected with two pivot levers 11, which with Clamping parts 12 and clamping screws 13 firmly with the shaft body 26 are connected. These two pivot levers 11 are designed that the two spring elements 10 during a closing movement of the gripper 3 can be clamped. This rotary motion is indicated by the arrow 31 in FIG. The generated here Tension of the two spring elements 10 acts via the pivot lever 11 as torque on the shaft body 26 and this Torque is a counter torque to the torque that the gripper 3 pressed against the pads 28. The value of this counter moment is, for example, 6 Nm. The torque that the gripper 3 pressed, is much larger, for example larger than 10 Nm. This counter moment creates a play in the drive 4 or in the gearbox of the drive. A game can between a closed drive curve, not shown here and a role in this curve. The Cancellation of the game has the consequence that the gripper 3 at The closing movement does not spring back from the supports 28 and so that a gentle closing is guaranteed. Because the grabs 3 do not spring back, the sheets 29 can be held more securely become. The suitable counter moment can be determined by tests become. The counter moment can be changed in a simple manner are released by the pivot lever 11 and on the shaft body 26 are rotated. The spring elements 10 are spiral springs here, it is clear to the person skilled in the art that the spring elements could also be different. It is essential Development of a counter-moment during a closing movement.

Da die Kompensationsfeder 9 aus vergleichsweise einfachen und kostengünstigen Einzelteilen herstellbar ist, ist der zusätzliche Aufwand vergleichsweise klein und erfordert keinerlei Wartung.Since the compensation spring 9 from comparatively simple and inexpensive parts can be produced is the additional Comparatively small effort and does not require any Maintenance.

Claims (5)

Greifertrommel mit einer Greiferwelle zum Greifen von Druckprodukten (29), wobei die Greiferwelle (2) einen durch eine Steuerbahn über einen Antrieb (4 bis 6) gesteuerten Wellenkörper (26) aufweist, auf dem mehrere Greifer (3) angeordnet sind und der zum Greifen der Druckprodukte (29) um seine Längsachse verdrehbar ist, dadurch gekennzeichnet, dass zur Aufhebung des Antriebsspiels zwischen Steuerbahn und Greifern (3) dem Antrieb (4 bis 6) eine Verspannvorrichtung zugeordnet ist.Gripper drum with a gripper shaft for gripping printed products (29), the gripper shaft (2) having a shaft body (26) controlled by a control track via a drive (4 to 6), on which a plurality of grippers (3) are arranged and for gripping of the printed products (29) can be rotated about its longitudinal axis, characterized in that a tensioning device is assigned to the drive (4 to 6) in order to cancel the drive play between the control track and grippers (3). Trommel nach Anspruch 1, gekennzeichnet durch einen Kraftspeicher, beispielsweise Kompensationsfeder (9), die während der Drehung der Wellenkörper (26) ein Gegendrehmoment bildet.Drum according to claim 1, characterized by a force accumulator, for example a compensation spring (9), which forms a counter torque during the rotation of the shaft bodies (26). Trommel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sie auf einer Greifertrommel (1) gelagert ist und die Greifer (3) in ihrer Arbeitslage einen Druckbogen (29) gegen eine periphere Mantelfläche (28) der Greifertrommel (1) pressen.Drum according to claim 1 or 2, characterized in that it is mounted on a gripper drum (1) and the grippers (3) in their working position press a printed sheet (29) against a peripheral surface (28) of the gripper drum (1). Trommel nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Kompensationsfeder (9) wenigstens einen Schwenkhebel (11) aufweist, der mit dem Wellenkörper (26) der Greiferwelle (2) drehfest verbunden ist und der bei jeder Schliessbewegung wenigstens ein Federelement (10) spannt.Drum according to claim 2 or 3, characterized in that the compensation spring (9) has at least one pivot lever (11) which is connected in a rotationally fixed manner to the shaft body (26) of the gripper shaft (2) and which has at least one spring element (10) with each closing movement tense. Trommel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Kompensationsfeder (9) spiralförmig ausgebildete Federelemente (10) aufweist, die jeweils an einem Ende mit dem Wellenkörper (26) der Greiferwelle (2) und mit dem anderen Ende mit einer Welle (7) eine Greifertrommel (1) wirkverbunden sind.Drum according to one of claims 1 to 4, characterized in that the compensation spring (9) has spiral-shaped spring elements (10), each at one end with the shaft body (26) of the gripper shaft (2) and at the other end with a shaft (7) a gripper drum (1) are operatively connected.
EP00810350A 2000-04-20 2000-04-20 Gripper shaft for clamping printed products Expired - Lifetime EP1148008B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00810350A EP1148008B1 (en) 2000-04-20 2000-04-20 Gripper shaft for clamping printed products
DE50003100T DE50003100D1 (en) 2000-04-20 2000-04-20 Gripper shaft for gripping printed products
JP2001119946A JP4926333B2 (en) 2000-04-20 2001-04-18 Gripper shaft for gripping printed products
US09/838,559 US6547240B2 (en) 2000-04-20 2001-04-20 Gripper drum for gripping printed products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00810350A EP1148008B1 (en) 2000-04-20 2000-04-20 Gripper shaft for clamping printed products

Publications (2)

Publication Number Publication Date
EP1148008A1 true EP1148008A1 (en) 2001-10-24
EP1148008B1 EP1148008B1 (en) 2003-07-30

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EP00810350A Expired - Lifetime EP1148008B1 (en) 2000-04-20 2000-04-20 Gripper shaft for clamping printed products

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US (1) US6547240B2 (en)
EP (1) EP1148008B1 (en)
JP (1) JP4926333B2 (en)
DE (1) DE50003100D1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1700803B1 (en) * 2005-03-10 2008-05-28 Müller Martini Holding AG Device for opening and depositing a folded sheet

Citations (4)

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US3960079A (en) * 1973-07-25 1976-06-01 Societa' Nebiolo S.P.A. Rotary printing press
US4241907A (en) * 1979-04-09 1980-12-30 Mccain Manufacturing Corporation Signature machine having an adjustable timing control of the extraction means
CH652103A5 (en) * 1981-09-22 1985-10-31 Grapha Holding Ag FEEDER FOR FOLDING SHEET.
US4681213A (en) * 1985-10-23 1987-07-21 Harris Graphics Corporation Gripper assembly

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US3806111A (en) * 1972-09-27 1974-04-23 Motter J Printing Press Co Signature inserter
CH617905A5 (en) * 1977-05-30 1980-06-30 Grapha Holding Ag
US4564186A (en) * 1984-06-04 1986-01-14 R. R. Donnelley & Sons Company Apparatus for gathering printed signatures for saddle stitching
EP0990610B1 (en) * 1998-09-28 2002-12-04 Grapha-Holding Ag Device for depositing folded sheet on a conveyor

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Publication number Priority date Publication date Assignee Title
US3960079A (en) * 1973-07-25 1976-06-01 Societa' Nebiolo S.P.A. Rotary printing press
US4241907A (en) * 1979-04-09 1980-12-30 Mccain Manufacturing Corporation Signature machine having an adjustable timing control of the extraction means
CH652103A5 (en) * 1981-09-22 1985-10-31 Grapha Holding Ag FEEDER FOR FOLDING SHEET.
US4681213A (en) * 1985-10-23 1987-07-21 Harris Graphics Corporation Gripper assembly

Also Published As

Publication number Publication date
EP1148008B1 (en) 2003-07-30
JP2002029645A (en) 2002-01-29
US20020060424A1 (en) 2002-05-23
JP4926333B2 (en) 2012-05-09
DE50003100D1 (en) 2003-09-04
US6547240B2 (en) 2003-04-15

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