EP0553455A1 - Method and device for lifting printed products from a stack - Google Patents

Method and device for lifting printed products from a stack Download PDF

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Publication number
EP0553455A1
EP0553455A1 EP92121139A EP92121139A EP0553455A1 EP 0553455 A1 EP0553455 A1 EP 0553455A1 EP 92121139 A EP92121139 A EP 92121139A EP 92121139 A EP92121139 A EP 92121139A EP 0553455 A1 EP0553455 A1 EP 0553455A1
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EP
European Patent Office
Prior art keywords
drive
suction head
drive mechanism
speed
along
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
EP92121139A
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German (de)
French (fr)
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EP0553455B1 (en
Inventor
Jürg Eberle
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.)
Ferag AG
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Ferag AG
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Publication date
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Publication of EP0553455A1 publication Critical patent/EP0553455A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0816—Suction grippers separating from the top of pile

Definitions

  • the present invention relates to a method and a device for lifting printed products from a stack according to the preamble of claims 1 and 4, respectively.
  • DE-C-27 32 591 discloses a device for dismantling a stack of printed products of this type, in which the suction head is moved by means of a drive mechanism along a closed orbit, the shape of which is a hypocycloid is similar.
  • the suction head detects a corner of the bottom printed product in the stack and takes this corner with it to the next lower reversal point.
  • the drive mechanism which has a planetary gear connected to a constant-speed drive motor, is now primarily there to move the suction head along the aforementioned path of movement having a specific shape.
  • the present invention is based on the object of providing a method and a device of the type mentioned at the outset which make it possible to vary the speed of the suction head during its movement along its path within wide limits and regardless of the shape of the movement path .
  • the solution according to the invention is based on the knowledge that the speed of movement of the suction head, as given by the drive mechanism, is superimposed on a speed which is generated by means which are separate from the drive mechanism. It is thus possible to vary the speed of movement of the suction head for a given form of the movement path, which is determined by the drive mechanism, without influencing this movement path, in particular in such a way that the speed of the suction head after the detection of a printed product when it is immediately taken along is minimal. This can prevent the subsequent product from being entrained by suction when the printed product is lifted off the stack.
  • FIGS. 1 and 2 denotes a stack which is formed by folded printed products 2.
  • the latter are fed by a feed conveyor 3 in a scale formation S, in which each printed product 2 rests on the trailing printed product.
  • the trailing edge 2a which is the fold edge in the present embodiment, lies in the scale formation S at the top.
  • the printed products 2 are pushed into the stack from below, as is explained in more detail in the Swiss patent application 46 / 92-1.
  • a suction head 4 which is only shown schematically and which can be periodically connected in a manner known per se to a vacuum source (not shown).
  • the suction head 4 is moved along a closed, pear-shaped orbit 6 by means of a drive mechanism 5.
  • the suction head 4 detects the uppermost printed product 2 in the area of its folded edge 2a and lifts the detected printed product from the stack 1 during the movement along the section 6a of the orbit 6.
  • the printed product 2 taken away is delivered by switching off the negative pressure.
  • the suction head 4 then continues to run in the direction of rotation U.
  • the respectively delivered printed product 2 is taken over by a conveyor, as is described in more detail in the already mentioned Swiss patent application 46 / 92-1.
  • the suction head 4 is fastened to a support tube 9 which is connected via a hose line, not shown, to the vacuum source which can be switched on and off, as already mentioned.
  • This support tube 9 is attached to one arm 10a of a two-armed lever 10, the other arm 10b of which is angled relative to the arm 10a.
  • the arm 10b forms the coupling of a crank rocker 11 and is connected to a crank 13 via a joint 12, the joint pin of which is designated 12a.
  • the latter is seated on a shaft 14 which is driven in the direction of arrow A and which is rotatably mounted in a bearing 15.
  • the shaft 14, the longitudinal axis of which is designated 14 ', is driven by a drive device to be described with reference to FIGS.
  • the arm 10b of the lever 10 is connected to a rocker arm 17 via a joint 16, the joint pin of which is designated 16a.
  • the latter is attached to a shaft 18 which is freely rotatably mounted in a bearing 19.
  • the longitudinal axis of this shaft 18 is designated 18 '.
  • the rocker 17 When the crank 13 is rotating, the rocker 17 is pivoted back and forth between two end positions, which are shown in broken lines in FIG. 1 and form an angle ⁇ .
  • the two end positions of the rocker arm 17 are designated by the positions of the pivot pin 16a designated 16a 'and 16a' '.
  • the suction head 4 is, as already mentioned, moved upward from the takeover point 7 along the section 6a of the orbit 6 to the delivery point 8. Between the takeover point 7 and the delivery point 8, the suction head 4 is, as already mentioned, connected to the vacuum source and takes the uppermost printed product 2 of the stack 1 with it. After the vacuum source has been switched off and the printed product 2 carried along has been released, the suction head 4 is moved further in the direction of the arrow U along the orbit 6 until it arrives again at the takeover point 7, where the next printed product 2 is detected.
  • the drive mechanism 5 In order for the suction head 4 to be moved along the desired path 6, the drive mechanism 5 must be designed accordingly. This special design of the drive mechanism 5 also defines the course of the speed at which the suction head 4 moves along the movement path 6. In order to be able to influence this speed curve determined by the construction of the drive mechanism 5, an intermediate or superposition gear 20 is connected upstream of the drive mechanism 5, which will now be explained in more detail with reference to FIGS. 3 and 4.
  • This intermediate gear 20 which in the present case is designed as a crank gear and in particular as a rotating crank loop, has a drive member 21 which is driven by a drive motor 22, shown only schematically, at constant speed, i.e. is driven at a constant angular velocity ⁇ 1.
  • the drive member 21 is rotatably supported about its axis 21 'in a housing 24 via bearings 23.
  • the longitudinal axis 25 'of the driving element 25 runs parallel to the axis of rotation 21' of the drive member 21 and is offset by the distance r from the latter. In other words, the driving element 25 is arranged eccentrically.
  • the driving element 25 is guided in a transverse groove 26 which is formed in an output member 27.
  • This output member 27 sits with a connecting part 27a on the shaft 14 of the drive mechanism 5.
  • the axis of rotation 27 'of the output member 27 is thus aligned with the axis of rotation 14' of the shaft 14, but is offset from the axis of rotation 21 'of the drive member 21 by the amount e.
  • the intermediate gear 20 designed as a rotating crank loop now converts the constant drive speed of the motor 22 into a periodically changing drive speed for the drive mechanism 5.
  • 5 shows the course of the angular velocity ⁇ as a function of the time t by the curve 28. While the angular velocity ⁇ 1 at the input of the intermediate gear 20 is constant, the angular velocity ⁇ 2 with which the shaft 14 of the drive mechanism 5 is driven changes between a minimum value 28a and one Maximum value 28b.
  • the positions of the intermediate gear 20 are indicated, in which the minimum (position 29a) and the maximum (position 29b) of the angular velocity ⁇ 2 occurs. It goes without saying that the position of the positions 29a, 29b can be chosen as desired.
  • the minimum angular velocity ⁇ 2 results from the formula while the maximum angular velocity ⁇ 2 from the formula results.
  • the speed curve generated by the intermediate gear 20 as described is thus superimposed on the speed curve which is determined by the construction of the drive mechanism 5.
  • This speed superposition now takes place such that the speed of movement of the suction head 4 in the area of the takeover point 7, i.e. when a printed product 2 is lifted immediately after the detection, is minimal and then increases. This ensures, on the one hand, that the uppermost printed product 2 of the stack 1 is detected correctly and, on the other hand, prevents the subsequent printed product 2 from being entrained as a result of the suction effect when the recorded printed product 2 is lifted off.
  • FIG. 6 differs from the embodiment according to FIGS. 1 and 2 by a different design of the drive mechanism for the suction head 4.
  • the suction head 4 is also attached to a support tube 30, which is only indicated schematically and which, as described with reference to FIGS. 1 and 2, is connected to a vacuum source via a hose line (not shown).
  • This support arm 30 is connected to a drive mechanism 31 which has a lever 32 with which the support tube 30 is fixedly connected.
  • This lever 32 is connected at both ends via joints 33 and 34 to other levers.
  • the joint 33 the lever 32 is connected to a lever 35 which is pivotally mounted in a bearing 36.
  • the lever 32 is connected to a two-armed lever 37, which is pivotably mounted in a bearing 38.
  • the two-armed lever 37 is connected at the other end via a further joint 39 to the coupling 40 of a crank drive, which is connected to a crank 42 via a joint 41.
  • the latter is seated on a shaft 43, only indicated schematically, which is connected to the output member 27 of the intermediate gear 20.
  • the crank 42 thus runs at the angular velocity ⁇ 2, the course of which is shown in Figure 5, in the direction of arrow B.
  • the connecting joint 41 between the crank 42 and the dome 40 accordingly runs along a circular path 44.
  • the lever 37 performs a pivoting movement about the axis of its bearing 38.
  • the two end positions of the lever 37 are shown on the one hand with a solid line and on the other hand with a dash-dotted line.
  • the two joints 34 and 39 of the lever 37 move back and forth along the tracks 45 and 46 between points I and II.
  • the lever 35 swings from the position shown with a solid line to the position shown in broken lines and back again, the joint 33 moving back and forth along the path 47 between points I 'and II'. Through this Swinging movement of the levers 37 and 35 also results in the movement of the lever 32, to which, as mentioned, the support tube 30 of the suction head 2 is fixed.
  • the suction head 2 is thereby moved from a takeover point 48 along the slightly curved movement path 49 to a delivery point 50 and on the same path 49 back to the takeover point 48.
  • the suction head 4 which is now connected to the vacuum source, detects the uppermost printed product 2 in the stack 1 and takes it to the delivery point 50, at which the taken-away printed product 2 is released by switching off the vacuum source.
  • the printed product 2 released by the suction head 4 is taken over by a conveyor, as is described in more detail in the previously mentioned Swiss patent application 46 / 92-1.
  • the moving speed of the suction head 4 which is given by the drive mechanism 31, is superimposed on the changing driving speed of the intermediate gear 20, so that the moving speed of the suction head 4 is in the range of Take-over point 48 is minimal when lifting off a printed product 2 immediately following the detection and then increases.
  • the desired speed profile for the suction head 4 can thus be achieved with differently designed drive mechanisms 5, 31.
  • a drive motor 22 with constant speed with an intermediate or superposition gear 20 can also be used, which can then be coupled directly to the shaft 14 or 43 of the drive mechanism 5 or 31.
  • the solution according to the invention can also be used in embodiments in which the printed products are not lifted off the stack from above as described above, but are instead pulled off the stack from below, such as e.g. in DE-C-27 32 591 and the corresponding US-A-4,127,262.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

A suction head (4) which can be periodically connected to a source of subatmospheric pressure is moved, by means of a lever mechanism (5), along a continuous circulatory path (6) between an acceptance point (7) and a discharge point (8). At the acceptance point (7), the suction head (4) picks up the respective uppermost product (2) of a stack (1) and takes it to the discharge point (8) at which the product (2) is discharged. The drive shaft (14) of the lever mechanism (5) is driven by a drive device with varying speed in such a manner that the suction head (4) is moved along its movement path (6) with a speed which is minimal in the region of the acceptance point (7) during the carrying along of a product (2) directly subsequently to the picking up, and subsequently increases. Perfect picking up of the printed products (2) is thereby achieved and it is avoided that the subsequent printed product is taken along by the suction effect. The drive device can be an intermediary gearing or variable-ratio planetary gearing which is driven at constant speed by a drive motor and it is designed for example as a rotating slider crank. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Abheben von Druckereierzeugnissen von einem Stapel gemäss Oberbegriff des Anspruches 1 bzw. 4.The present invention relates to a method and a device for lifting printed products from a stack according to the preamble of claims 1 and 4, respectively.

Aus der DE-C-27 32 591 (und der entsprechenden US-A-4,127,262) ist eine Einrichtung zum Abbauen eines Stapels von Druckereierzeugnissen dieser Art bekannt, bei der der Saugkopf mittels eines Antriebsmechanismus entlang einer geschlossenen Umlaufbahn bewegt wird, deren Form einer Hypozykloide ähnlich ist. In einem oberen Umkehrpunkt dieser Bewegungsbahn erfasst der Saugkopf eine Ecke des jeweils untersten Druckereierzeugnisses im Stapel und nimmt diese Ecke bis zum nächsten, unteren Umkehrpunkt mit. Der Antriebsmechanismus, der ein mit einem Antriebsmotor mit konstanter Drehzahl verbundenes Planetengetriebe aufweist, ist nun in erster Linie dazu da, den Saugkopf entlang der erwähnten, eine bestimmte Form aufweisenden Bewegungsbahn zu bewegen. Zwar ändert sich die Geschwindigkeit des Saugkopfes während seiner Bewegung entlang der Bewegungsbahn, doch sind die auftretenden Geschwindigkeitsänderungen an die Konstruktion des Antriebsmechanismus und damit an die Form der Bewegungsbahn gebunden.DE-C-27 32 591 (and the corresponding US-A-4,127,262) discloses a device for dismantling a stack of printed products of this type, in which the suction head is moved by means of a drive mechanism along a closed orbit, the shape of which is a hypocycloid is similar. In an upper reversal point of this movement path, the suction head detects a corner of the bottom printed product in the stack and takes this corner with it to the next lower reversal point. The drive mechanism, which has a planetary gear connected to a constant-speed drive motor, is now primarily there to move the suction head along the aforementioned path of movement having a specific shape. Although the speed of the suction head changes during its movement along the path of movement, the changes in speed that occur are linked to the design of the drive mechanism and thus to the shape of the path of movement.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art zu schaffen, das bzw. die es ermöglicht, die Geschwindigkeit des Saugkopfes während dessen Bewegung entlang seiner Bahn in weiten Grenzen und unabhängig von der Form der Bewegungsbahn zu varieren.The present invention is based on the object of providing a method and a device of the type mentioned at the outset which make it possible to vary the speed of the suction head during its movement along its path within wide limits and regardless of the shape of the movement path .

Diese Aufgabe wird erfindungsgemäss durch die Merkmale des kennzeichnenden Teils des Anspruches 1 bzw. 4 gelöst.According to the invention, this object is achieved by the features of the characterizing part of claims 1 and 4, respectively.

Der erfindungsgemässen Lösung liegt nun die Erkenntnis zugrunde, der Bewegungsgeschwindigkeit des Saugkopfes, wie sie durch den Antriebsmechanismus gegeben ist, eine Geschwindigkeit zu überlagern, die durch Mittel erzeugt wird, welche vom Antriebsmechanismus getrennt sind. Somit ist es möglich, bei einer gegebenen Form der Bewegungsbahn, die durch den Antriebsmechnismus bestimmt ist, ohne Beeinflussung dieser Bewegungsbahn die Bewegungsgeschwindigkeit des Saugkopfes zu varieren, und zwar insbesondere so, dass die Geschwindigkeit des Saugkopfes nach dem Erfassen eines Druckereierzeugnisses beim darauf unmittelbar folgenden Mitnehmen minimal ist. Damit kann vermieden werden, dass das nachfolgende Erzeugnis beim Abheben des Druckereierzeugnisses vom Stapel durch Sogwirkung mitgerissen wird.The solution according to the invention is based on the knowledge that the speed of movement of the suction head, as given by the drive mechanism, is superimposed on a speed which is generated by means which are separate from the drive mechanism. It is thus possible to vary the speed of movement of the suction head for a given form of the movement path, which is determined by the drive mechanism, without influencing this movement path, in particular in such a way that the speed of the suction head after the detection of a printed product when it is immediately taken along is minimal. This can prevent the subsequent product from being entrained by suction when the printed product is lifted off the stack.

Bevorzugte Weiterausbildungen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen definiert.Preferred further developments of the subject matter of the invention are defined in the dependent claims.

Im folgenden werden anhand der Zeichnung Ausführungsbeispiele des Erfindungsgegenstandes näher erläutert. Es zeigt rein schematisch:

Fig. 1
in Seitenansicht eine erste Ausführungsform einer Vorrichtung zum Abheben von Druckereierzeugnissen von einem Stapel,
Fig. 2
den Antriebsmechanismus der Vorrichtung gemäss Figur 1 im Querschnitt,
Fig.3
in Seitenansicht und teilweise im Schnitt ein Zwischengetriebe,
Fig.4
das Zwischengetriebe gemäss Figur 3 in Ansicht von dessen Antriebsseite her,
Fig. 5
ein Geschwindigkeits-Zeit-Diagramm, und
Fig.6
vereinfacht eine zweite Ausführungsform einer Vorrichtung zum Abheben von Druckereierzeugnissen von einem Stapel mit einer ganz schematischen Darstellung des Antriebsmechanismus.
Exemplary embodiments of the subject matter of the invention are explained in more detail below with reference to the drawing. It shows purely schematically:
Fig. 1
a side view of a first embodiment of a device for lifting printed products from a stack,
Fig. 2
the drive mechanism of the device according to Figure 1 in cross section,
Fig. 3
in side view and partly in section an intermediate gear,
Fig. 4
3 in a view from the drive side thereof,
Fig. 5
a speed-time diagram, and
Fig. 6
Simplifies a second embodiment of an apparatus for lifting printed products from a stack with a very schematic representation of the drive mechanism.

In den Figuren 1 und 2 ist mit 1 ein Stapel bezeichnet, der durch gefaltete Druckereierzeugnisse 2 gebildet ist. Letztere werden durch einen Zuförderer 3 in einer Schuppenformation S zugebracht, in der jedes Druckereierzeugnis 2 auf dem nachlaufenden Druckereierzeugnis aufliegt. Dies bedeutet, dass die nachlaufende Kante 2a, die bei der vorliegenden Ausführungsform die Falzkante ist, in der Schuppenformation S oben liegt. Die Druckereierzeugnisse 2 werden von unten in den Stapel aufgeschoben, wie das in der schweizerischen Patentanmeldung 46/92-1 näher erläutert ist.In FIGS. 1 and 2, 1 denotes a stack which is formed by folded printed products 2. The latter are fed by a feed conveyor 3 in a scale formation S, in which each printed product 2 rests on the trailing printed product. This means that the trailing edge 2a, which is the fold edge in the present embodiment, lies in the scale formation S at the top. The printed products 2 are pushed into the stack from below, as is explained in more detail in the Swiss patent application 46 / 92-1.

Zum Abheben des jeweils obersten Druckereierzeugnisses 2 vom Stapel 1 ist ein nur schematisch dargestellter Saugkopf 4 vorhanden, der auf an sich bekannte Weise periodisch an eine nicht näher dargestellte Unterdruckquelle anschliessbar ist. Der Saugkopf 4 wird mittels eines Antriebsmechanismum 5 entlang einer geschlossenen, birnenförmigen Umlaufbahn 6 bewegt. An einer Uebernahmestelle 7, die sich an der Spitze der Umlaufbahn 6 befindet, erfasst der Saugkopf 4 das jeweils oberste Druckereierzeugnis 2 im Bereich dessen Falzkante 2a und hebt das erfasste Druckereierzeugnis während der Bewegung entlang des Abschnittes 6a der Umlaufbahn 6 vom Stapel 1 ab. An der mit 8 bezeichneten Abgabestelle wird durch Wegschalten des Unterdruckes das mitgenommene Druckereierzeugnis 2 abgegeben. Anschliessend läuft der Saugkopf 4 in Umlaufrichtung U weiter. Das jeweils abgegebene Druckereierzeugnis 2 wird von einem Wegförderer übernommen, wie das in der bereits erwähnten schweizerischen Patentanmeldung 46/92-1 ausführlicher beschrieben ist.To lift the uppermost printed product 2 from the stack 1 there is a suction head 4 which is only shown schematically and which can be periodically connected in a manner known per se to a vacuum source (not shown). The suction head 4 is moved along a closed, pear-shaped orbit 6 by means of a drive mechanism 5. At a takeover point 7, which is located at the top of the orbit 6, the suction head 4 detects the uppermost printed product 2 in the area of its folded edge 2a and lifts the detected printed product from the stack 1 during the movement along the section 6a of the orbit 6. At the delivery point designated 8, the printed product 2 taken away is delivered by switching off the negative pressure. The suction head 4 then continues to run in the direction of rotation U. The respectively delivered printed product 2 is taken over by a conveyor, as is described in more detail in the already mentioned Swiss patent application 46 / 92-1.

Im folgenden wird nun der Aufbau und die Wirkungsweise des Antriebsmechanismus 5 näher erläutert.The structure and the mode of operation of the drive mechanism 5 will now be explained in more detail below.

Wie insbesondere die Figur 2 zeigt, ist der Saugkopf 4 an einem Tragrohr 9 befestigt, das über eine nicht dargestellte Schlauchleitung mit der bereits erwähnten zu- und wegschaltbaren Unterdruckquelle verbunden ist. Dieses Tragrohr 9 ist am einen Arm 10a eines zweiarmigen Hebels 10 befestigt, dessen anderer Arm 10b gegenüber dem Arm 10a abgewinkelt ist. Der Arm 10b bildet die Koppel einer Kurbelschwinge 11 und ist über ein Gelenk 12, dessen Gelenkzapfen mit 12a bezeichnet ist, mit einer Kurbel 13 verbunden. Letztere sitzt auf einer in Richtung des Pfeiles A umlaufend angetriebenen Welle 14, die in einem Lager 15 drehbar gelagert ist. Die Welle 14, deren Längsachse mit 14' bezeichnet ist, wird von einer anhand der Figuren 3 und 4 noch zu beschreibenden Antriebseinrichtung angetrieben. Am anderen Ende ist der Arm 10b des Hebels 10 über ein Gelenk 16, dessen Gelenkzapfen mit 16a bezeichnet ist, mit einer Schwinge 17 verbunden. Letztere ist auf einer Welle 18 befestigt, die frei drehbar in einem Lager 19 gelagert ist. Die Längsachse dieser Welle 18 ist mit 18' bezeichnet.As FIG. 2 in particular shows, the suction head 4 is fastened to a support tube 9 which is connected via a hose line, not shown, to the vacuum source which can be switched on and off, as already mentioned. This support tube 9 is attached to one arm 10a of a two-armed lever 10, the other arm 10b of which is angled relative to the arm 10a. The arm 10b forms the coupling of a crank rocker 11 and is connected to a crank 13 via a joint 12, the joint pin of which is designated 12a. The latter is seated on a shaft 14 which is driven in the direction of arrow A and which is rotatably mounted in a bearing 15. The shaft 14, the longitudinal axis of which is designated 14 ', is driven by a drive device to be described with reference to FIGS. 3 and 4. At the other end, the arm 10b of the lever 10 is connected to a rocker arm 17 via a joint 16, the joint pin of which is designated 16a. The latter is attached to a shaft 18 which is freely rotatably mounted in a bearing 19. The longitudinal axis of this shaft 18 is designated 18 '.

Die Schwinge 17 wird bei sich drehender Kurbel 13 zwischen zwei Endstellungen, die in Figur 1 strichpunktiert dargestellt sind und einen Winkel α einschliessen, hin und her verschwenkt. Die beiden Endlagen der Schwinge 17 sind durch die mit 16a' und 16a'' bezeichneten Positionen des Gelenkzapfens 16a bezeichnet. Die diesen Endlagen 16a' und 16a'' zugeordneten Positionen des Gelenkzapfens 12a sind mit 12a' und 12a'' bezeichnet.When the crank 13 is rotating, the rocker 17 is pivoted back and forth between two end positions, which are shown in broken lines in FIG. 1 and form an angle α. The two end positions of the rocker arm 17 are designated by the positions of the pivot pin 16a designated 16a 'and 16a' '. The positions of the pivot pin 12a assigned to these end positions 16a 'and 16a' 'are designated by 12a' and 12a ''.

Mittels des beschriebenen Hebelantriebsmechanismus 5 wird nun der Saugkopf 4 wie bereits erwähnt von der Uebernahmestelle 7 entlang des Abschnittes 6a der Umlaufbahn 6 nach oben zur Abgabestelle 8 bewegt. Zwischen Uebernahmestelle 7 und Abgabestelle 8 ist der Saugkopf 4 wie bereits erwähnt mit der Unterdruckquelle verbunden und nimmt jeweils das oberste Druckereierzeugnis 2 des Stapels 1 mit. Nach dem Wegschalten der Unterdruckquelle und dem dadurch erfolgten Freigeben des mitgenommenen Druckereierzeugnisses 2 wird der Saugkopf 4 weiter in Richtung des Pfeiles U entlang der Umlaufbahn 6 bewegt, bis er wieder zur Uebernahmestelle 7 gelangt, wo das nächste Druckereierzeugnis 2 erfasst wird.By means of the lever drive mechanism 5 described, the suction head 4 is, as already mentioned, moved upward from the takeover point 7 along the section 6a of the orbit 6 to the delivery point 8. Between the takeover point 7 and the delivery point 8, the suction head 4 is, as already mentioned, connected to the vacuum source and takes the uppermost printed product 2 of the stack 1 with it. After the vacuum source has been switched off and the printed product 2 carried along has been released, the suction head 4 is moved further in the direction of the arrow U along the orbit 6 until it arrives again at the takeover point 7, where the next printed product 2 is detected.

Damit der Saugkopf 4 entlang der gewünschten Bahn 6 bewegt wird, muss der Antriebsmechanismus 5 entsprechend ausgebildet sein. Durch diese spezielle Ausbildung des Antriebsmechanismus 5 ist auch der Verlauf der Geschwindigkeit, mit der sich der Saugkopf 4 entlang der Bewegungsbahn 6 bewegt, festgelegt. Um nun diesen durch die Konstruktion des Antriebsmechanismus 5 bestimmten Geschwindigkeitsverlauf beeinflussen zu können, ist dem Antriebsmechanismums 5 ein Zwischen- oder Ueberlagerungsgetriebe 20 vorgeschaltet, das nun anhand der Figuren 3 und 4 näher erläutert wird.In order for the suction head 4 to be moved along the desired path 6, the drive mechanism 5 must be designed accordingly. This special design of the drive mechanism 5 also defines the course of the speed at which the suction head 4 moves along the movement path 6. In order to be able to influence this speed curve determined by the construction of the drive mechanism 5, an intermediate or superposition gear 20 is connected upstream of the drive mechanism 5, which will now be explained in more detail with reference to FIGS. 3 and 4.

Dieses Zwischengetriebe 20, das im vorliegenden Fall als Kurbelgetriebe und im speziellen als umlaufende Kurbelschleife ausgebildet ist, weist ein Antriebsglied 21 auf, das von einem nur schematisch dargestellten Antriebsmotor 22 mit konstanter Drehzahl, d.h. mit konstanter Winkelgeschwindigkeit ω₁, angetrieben wird. Das Antriebsglied 21 ist über Lager 23 um seine Achse 21' drehbar in einem Gehäuse 24 gelagert. Im Antriebsglied 21 ist ein Mitnahmeelement 25, das im vorliegenden Ausführungsbeispiel eine Rolle ist, befestigt, z.B. mittels einer Schraubverbindung. Die Längsachse 25' des Mitnahmeelementes 25 verläuft parallel zur Drehachse 21' des Antriebsgliedes 21 und ist gegenüber letzterer um den Abstand r versetzt. Anders ausgedrückt ist das Mitnahmeelement 25 exzentrisch angeordnet.This intermediate gear 20, which in the present case is designed as a crank gear and in particular as a rotating crank loop, has a drive member 21 which is driven by a drive motor 22, shown only schematically, at constant speed, i.e. is driven at a constant angular velocity ω₁. The drive member 21 is rotatably supported about its axis 21 'in a housing 24 via bearings 23. A drive element 25, which is a roller in the present exemplary embodiment, is fastened in the drive member 21, e.g. by means of a screw connection. The longitudinal axis 25 'of the driving element 25 runs parallel to the axis of rotation 21' of the drive member 21 and is offset by the distance r from the latter. In other words, the driving element 25 is arranged eccentrically.

Das Mitnahmeelement 25 ist in einer Quernut 26 geführt, die in einem Abtriebsglied 27 ausgebildet ist. Dieses Abtriebsglied 27 sitzt mit einem Verbindungsteil 27a auf der Welle 14 des Antriebsmechanismus 5. Die Drehachse 27' des Abtriebsgliedes 27 fluchtet somit mit der Drehachse 14' der Welle 14, ist jedoch gegenüber der Drehachse 21' des Antriebsgliedes 21 um den Betrag e versetzt.The driving element 25 is guided in a transverse groove 26 which is formed in an output member 27. This output member 27 sits with a connecting part 27a on the shaft 14 of the drive mechanism 5. The axis of rotation 27 'of the output member 27 is thus aligned with the axis of rotation 14' of the shaft 14, but is offset from the axis of rotation 21 'of the drive member 21 by the amount e.

Das wie erwähnt als umlaufende Kurbelschleife ausgebildete Zwischengetriebe 20 formt nun die konstante Antriebsgeschwindigkeit des Motors 22 in eine sich periodisch ändernde Antriebsgeschwindigkeit für den Antriebsmechanismus 5 um. In Figur 5 ist der Verlauf der Winkelgeschwindigkeit ω in Abhängigkeit von der Zeit t durch die Kurve 28 dargestellt. Während die Winkelgeschwindigkeit ω₁ am Eingang des Zwischengetriebes 20 konstant ist, ändert sich die Winkelgeschwindigkeit ω₂, mit der die Welle 14 des Antriebsmechanismus 5 angetrieben wird, zwischen einem Minimalwert 28a und einem Maximalwert 28b. In Figur 4 sind mit 29a und 29b die Stellungen des Zwischengetriebes 20 angegeben, in denen das Minimum (Stellung 29a) und das Maximum (Stellung 29b) der Winkelgeschwindigkeit ω₂ auftritt. Es versteht sich, dass die Lage der Stellungen 29a, 29b beliebig gewählt werden können.The intermediate gear 20 designed as a rotating crank loop, as mentioned, now converts the constant drive speed of the motor 22 into a periodically changing drive speed for the drive mechanism 5. 5 shows the course of the angular velocity ω as a function of the time t by the curve 28. While the angular velocity ω₁ at the input of the intermediate gear 20 is constant, the angular velocity ω₂ with which the shaft 14 of the drive mechanism 5 is driven changes between a minimum value 28a and one Maximum value 28b. In Figure 4 with 29a and 29b, the positions of the intermediate gear 20 are indicated, in which the minimum (position 29a) and the maximum (position 29b) of the angular velocity ω₂ occurs. It goes without saying that the position of the positions 29a, 29b can be chosen as desired.

Die minimale Winkelgeschwindigkeit ω₂ ergibt sich aus der Formel

Figure imgb0001

während sich die maximale Winkelgeschwindigkeit ω₂ aus der Formel
Figure imgb0002
ergibt.The minimum angular velocity ω₂ results from the formula
Figure imgb0001
while the maximum angular velocity ω₂ from the formula
Figure imgb0002
results.

Der vom Zwischengetriebe 20 wie beschrieben erzeugte Geschwindigkeitsverlauf wird somit dem Geschwindigkeitsverlauf überlagert, der durch die Konstruktion des Antriebsmechanismus 5 bestimmt ist. Diese Geschwindigkeitsüberlagerung erfolgt nun so, dass die Bewegungsgeschwindigkeit des Saugkopfes 4 im Bereich der Uebernahmestelle 7, d.h. beim unmittelbar an das Erfassen anschliessenden Anheben eines Druckereierzeugnisses 2, minimal ist und dann zunimmt. Dadurch wird einerseits ein einwandfreies Erfassen des jeweils obersten Druckereierzeugnisses 2 des Stapels 1 sichergestellt und andererseits vermieden, dass beim Abheben des erfassten Druckereierzeugnisses 2 das nachfolgende Druckereierzeugnis 2 infolge Sogwirkung mitgerissen wird.The speed curve generated by the intermediate gear 20 as described is thus superimposed on the speed curve which is determined by the construction of the drive mechanism 5. This speed superposition now takes place such that the speed of movement of the suction head 4 in the area of the takeover point 7, i.e. when a printed product 2 is lifted immediately after the detection, is minimal and then increases. This ensures, on the one hand, that the uppermost printed product 2 of the stack 1 is detected correctly and, on the other hand, prevents the subsequent printed product 2 from being entrained as a result of the suction effect when the recorded printed product 2 is lifted off.

Anhand der sehr schematischen Darstellung der Figur 6 wird nun eine andere Ausführungsform einer Vorrichtung zum Abheben der Druckereierzeugnisse 2 vom Stapel 1 beschrieben, die sich von der Ausführungsform gemäss den Figuren 1 und 2 durch eine andere Ausbildung des Antriebsmechanismus für den Saugkopf 4 unterscheidet.Another embodiment of a device for lifting the printed products 2 from the stack 1 will now be described with reference to the very schematic representation of FIG. 6, which differs from the embodiment according to FIGS. 1 and 2 by a different design of the drive mechanism for the suction head 4.

Der Saugkopf 4 ist ebenfalls an einem nur schematisch angedeuteten Tragrohr 30 befestigt, das wie anhand der Figuren 1 und 2 beschrieben über eine nicht gezeigte Schlauchleitung mit einer Unterdruckquelle verbunden ist. Dieser Tragarm 30 ist mit einem Antriebsmechanismus 31 verbunden, der einen Hebel 32 aufweist, mit dem das Tragrohr 30 fest verbunden ist. Dieser Hebel 32 steht an beiden Enden über Gelenke 33 und 34 mit weiteren Hebeln in Verbindung. Mittels des Gelenkes 33 ist der Hebel 32 mit einem Hebel 35 verbunden, der in einem Lager 36 schwenkbar gelagert ist. Ueber das andere Gelenk 34 steht der Hebel 32 mit einem zweiarmigen Hebel 37 in Verbindung, der schwenkbar in einem Lager 38 gelagert ist. Der zweiarmige Hebel 37 ist am anderen Ende über ein weiteres Gelenk 39 mit der Koppel 40 eines Kurbelantriebes verbunden, welche über ein Gelenk 41 mit einer Kurbel 42 verbunden ist. Letztere sitzt auf einer nur schematisch angedeuteten Welle 43, die mit dem Abtriebsglied 27 des Zwischengetriebes 20 verbunden ist. Die Kurbel 42 läuft somit mit der Winkelgeschwindigkeit ω₂, deren Verlauf in Figur 5 dargestellt ist, in Richtung des Pfeiles B um.The suction head 4 is also attached to a support tube 30, which is only indicated schematically and which, as described with reference to FIGS. 1 and 2, is connected to a vacuum source via a hose line (not shown). This support arm 30 is connected to a drive mechanism 31 which has a lever 32 with which the support tube 30 is fixedly connected. This lever 32 is connected at both ends via joints 33 and 34 to other levers. By means of the joint 33, the lever 32 is connected to a lever 35 which is pivotally mounted in a bearing 36. Via the other joint 34, the lever 32 is connected to a two-armed lever 37, which is pivotably mounted in a bearing 38. The two-armed lever 37 is connected at the other end via a further joint 39 to the coupling 40 of a crank drive, which is connected to a crank 42 via a joint 41. The latter is seated on a shaft 43, only indicated schematically, which is connected to the output member 27 of the intermediate gear 20. The crank 42 thus runs at the angular velocity ω₂, the course of which is shown in Figure 5, in the direction of arrow B.

Das Verbindungsgelenk 41 zwischen der Kurbel 42 und der Kuppel 40 läuft dementsprechend entlang einer kreisförmigen Bahn 44 um. Der Hebel 37 führt dabei eine Schwenkbewegung um die Achse seines Lagers 38 aus. Die beiden Endlagen des Hebels 37 sind einerseits mit einer ausgezogenen Linie und andererseits mit einer strichpunktierten Linie dargestellt. Die beiden Gelenke 34 und 39 des Hebels 37 bewegen sich dabei entlang der Bahnen 45 und 46 zwischen den Punkten I und II hin und her. Der Hebel 35 schwingt von der mit einer ausgezogenen Linie dargestellten Stellung in die strichpunktiert dargestellte Stellung und wieder zurück, wobei sich das Gelenk 33 entlang der Bahn 47 zwischen den Punkten I' und II' hin und her bewegt. Durch diese Schwingbewegung der Hebel 37 und 35 ergibt sich auch die Bewegung des Hebels 32, an dem wie erwähnt fest das Tragrohr 30 des Saugkopfes 2 angebracht ist. Der Saugkopf 2 wird dadurch von einer Uebernahmestelle 48 entlang der leicht gekrümmten Bewegungsbahn 49 zu einer Abgabestelle 50 und auf derselben Bahn 49 wieder zurück zur Uebernahmestelle 48 bewegt. An der Uebernahmestelle 48 erfasst der nun an die Unterdruckquelle angeschlossene Saugkopf 4 das jeweils oberste Druckereierzeugnis 2 im Stapel 1 und nimmt dieses bis zur Abgabestelle 50 mit, an der durch Wegschalten der Unterdruckquelle das mitgenommene Druckereierzeugnis 2 freigegeben wird. An dieser Abgabestelle 50 wird das vom Saugkopf 4 freigegebene Druckereierzeugnis 2 von einem Wegförderer übernommen, wie das in der schon früher erwähnten schweizerischen Patentanmeldung 46/92-1 ausführlicher beschrieben ist.The connecting joint 41 between the crank 42 and the dome 40 accordingly runs along a circular path 44. The lever 37 performs a pivoting movement about the axis of its bearing 38. The two end positions of the lever 37 are shown on the one hand with a solid line and on the other hand with a dash-dotted line. The two joints 34 and 39 of the lever 37 move back and forth along the tracks 45 and 46 between points I and II. The lever 35 swings from the position shown with a solid line to the position shown in broken lines and back again, the joint 33 moving back and forth along the path 47 between points I 'and II'. Through this Swinging movement of the levers 37 and 35 also results in the movement of the lever 32, to which, as mentioned, the support tube 30 of the suction head 2 is fixed. The suction head 2 is thereby moved from a takeover point 48 along the slightly curved movement path 49 to a delivery point 50 and on the same path 49 back to the takeover point 48. At the take-over point 48, the suction head 4, which is now connected to the vacuum source, detects the uppermost printed product 2 in the stack 1 and takes it to the delivery point 50, at which the taken-away printed product 2 is released by switching off the vacuum source. At this delivery point 50, the printed product 2 released by the suction head 4 is taken over by a conveyor, as is described in more detail in the previously mentioned Swiss patent application 46 / 92-1.

Auch bei der Ausführungsform gemäss Fig. 6 wird wie anhand der Figuren 1-5 beschrieben der Bewegungsgeschwindigkeit des Saugkopfes 4, die durch den Antriebsmechanismus 31 gegeben ist, die sich ändernde Antriebsgeschwindigkeit des Zwischengetriebes 20 überlagert, so dass die Bewegungsgeschwindigkeit des Saugkopfes 4 im Bereich der Uebernahmestelle 48 beim unmittelbar auf das Erfassen folgenden Abheben eines Druckereierzeugnisses 2 minimal ist und dann zunimmt.Also in the embodiment according to FIG. 6, as described with reference to FIGS. 1-5, the moving speed of the suction head 4, which is given by the drive mechanism 31, is superimposed on the changing driving speed of the intermediate gear 20, so that the moving speed of the suction head 4 is in the range of Take-over point 48 is minimal when lifting off a printed product 2 immediately following the detection and then increases.

Mit demselben Zwischengetriebe 20 kann somit bei verschieden ausgebildeten Antriebsmechanismen 5,31 der gewünschte Geschwindigkeitsverlauf für den Saugkopf 4 erzielt werden.With the same intermediate gear 20, the desired speed profile for the suction head 4 can thus be achieved with differently designed drive mechanisms 5, 31.

Es ist auch möglich, das Zwischengetriebe 20 von der anderen Seite her, d.h. vom Glied 27 her, anzutreiben. Letzteres wird dann zum mit dem Motor 22 gekoppelten Antriebsglied, während die Antriebswelle 14,43 des Antriebsmechanismus 5,31 mit dem nun als Abtriebsglied wirkenden Glied 21 verbunden ist.It is also possible to move the intermediate gear 20 from the other side, i.e. from link 27 to drive. The latter then becomes the drive element coupled to the motor 22, while the drive shaft 14, 43 of the drive mechanism 5, 31 is connected to the element 21, which now acts as an output element.

Anstelle der Kombination eines Antriebsmotors 22 mit konstanter Drehzahl mit einem Zwischen- oder Ueberlagerungsgetriebe 20 kann auch ein Antriebsmotor mit regelbarer Drehzahl verwendet werden, der dann direkt mit der Welle 14 bzw. 43 des Antriebsmechanismus 5 bzw. 31 gekoppelt werden kann.Instead of the combination of a drive motor 22 with constant speed with an intermediate or superposition gear 20, a drive motor with adjustable speed can also be used, which can then be coupled directly to the shaft 14 or 43 of the drive mechanism 5 or 31.

Die erfindungsgemässe Lösung lässt sich auch bei Ausführungsformen verwenden, bei denen die Druckereierzeugnisse nicht wie vorstehend beschrieben von oben vom Stapel abgehoben werden, sondern von unten vom Stapel abgezogen werden, wie das z.B. in der DE-C-27 32 591 und der entsprechenden US-A-4,127,262 beschrieben ist.The solution according to the invention can also be used in embodiments in which the printed products are not lifted off the stack from above as described above, but are instead pulled off the stack from below, such as e.g. in DE-C-27 32 591 and the corresponding US-A-4,127,262.

Claims (13)

Verfahren zum Abheben von Druckereierzeugnissen von einem Stapel, bei dem wenigstens ein zeitweilig an eine Unterdruckquelle anschliessbarer Saugkopf (4) mittels eines Antriebsmechanismus (5,31), der mit einem Antriebsmotor (22) gekoppelt ist, entlang einer Bewegungsbahn (6,49) von einer Uebernahmestelle (7,48), an der jeweils ein Erzeugnis (2) erfasst wird, zu einer Abgabestelle (8,50), an der das erfasste Erzeugnis (2) abgegeben wird, und zurück bewegt wird, dadurch gekennzeichnet, dass der Antriebsmechanismus (5,31) derart mit sich ändernder Geschwindigkeit (ω₂) angetrieben wird, dass der Saugkopf (4) mit einer Geschwindigkeit entlang seiner Bewegungsbahn (6,49) bewegt wird, die im Bereich der Uebernahmestelle (6,49) beim unmittelbar auf das Erfassen folgenden Mitnehmen eines Erzeugnisses (2) minimal wird und anschliessend zunimmt.Method for lifting printed products from a stack, in which at least one suction head (4), which can temporarily be connected to a vacuum source, by means of a drive mechanism (5, 31), which is coupled to a drive motor (22), along a movement path (6, 49) a takeover point (7, 48), at each of which a product (2) is detected, to a delivery point (8, 50), at which the detected product (2) is released, and moved back, characterized in that the drive mechanism (5,31) is driven with changing speed (ω₂) that the suction head (4) is moved at a speed along its path of movement (6.49), which in the area of the takeover point (6.49) when directly on the Capture the following take of a product (2) becomes minimal and then increases. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die vorzugsweise konstante Drehzahl (ω₁) des Antriebsmotors (22) durch ein Zwischengetriebe (20) in die sich ändernde Antriebsgeschwindigkeit (ω₂) für den Antriebsmechanismus (5,31) umgeformt wird.A method according to claim 1, characterized in that the preferably constant speed (ω₁) of the drive motor (22) is converted by an intermediate gear (20) into the changing drive speed (ω₂) for the drive mechanism (5,31). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die sich ändernde Antriebsgeschwindigkeit (ω₂) für den Antriebsmechanismus (5,31) durch Aenderung der Drehzahl des Antriebsmotors erzeugt wird.A method according to claim 1, characterized in that the changing drive speed (ω₂) for the drive mechanism (5,31) is generated by changing the speed of the drive motor. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1-3 zum Abheben von Druckereierzeugnissen von einem Stapel, mit wenigstens einem zum Erfassen und Mitnehmen jeweils eines Erzeugnisses (2) zeitweilig an eine Unterdruckquelle anschliessbaren Saugkopf (4), und einem mit einem Antriebsmotor (22) gekoppelten Antriebsmechanismus (5,31) für den Saugkopf (2) zum Bewegen des letzteren entlang einer Bewegungsbahn (6,49) von einer Uebernahmestelle (7,48), an der der Saugkopf (4) jeweils ein Erzeugnis (2) erfasst, zu einer Abgabestelle (8,50), an der der Saugkopf (4) das erfasste Erzeugnis (2) abgibt, und zurück, gekennzeichnet durch Mittel (20) zum Antreiben des Antriebsmechanismus (5,31) mit sich ändernder Geschwindigkeit (ω₂) derart, dass der Saugkopf (4) mit einer Geschwindigkeit entlang seiner Bewegungsbahn (6,49) bewegbar ist, die im Bereich der Uebernahmestelle (7,48) beim unmittelbar auf das Erfassen folgenden Mitnehmen der Erzeugnisse (2) minimal ist und anschliessend zunimmt.Device for carrying out the method according to one of claims 1-3 for lifting printed products from a stack, with at least one suction head (4) which can be temporarily connected to a vacuum source and one with a drive motor (22 ) coupled drive mechanism (5,31) for the suction head (2) for moving the latter along a movement path (6,49) from a takeover point (7,48) at which the suction head (4) detects a product (2), to a delivery point (8, 50) at which the suction head (4) delivers the detected product (2), and back, characterized by means (20) for driving the drive mechanism (5, 31) with changing speed (ω₂) in such a way that the suction head (4) can be moved at a speed along its path of movement (6, 49) which is minimal in the area of the takeover point (7,48) when the products (2) are taken along immediately after detection and are then connected increasing increases. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Antriebsmechanismus (5,31) direkt mit einem Antriebsmotor mit regelbarer Drehzahl gekoppelt ist.Apparatus according to claim 4, characterized in that the drive mechanism (5,31) is directly coupled to a drive motor with adjustable speed. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Antriebsmotor (22) über ein Zwischengetriebe (20), das die vorzugsweise konstante Drehzahl (ω₁) des Antriebsmotors (22) in die sich ändernde Antriebsgeschwindigkeit (ω₂) für den Antriebsmechanismus (5,31) umwandelt, mit dem Antriebsmechanismus (5,31) gekoppelt ist.Apparatus according to claim 4, characterized in that the drive motor (22) via an intermediate gear (20), which converts the preferably constant speed (ω₁) of the drive motor (22) into the changing drive speed (ω₂) for the drive mechanism (5,31) converted, is coupled to the drive mechanism (5,31). Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Zwischengetriebe (20) ein Kurbelgetriebe ist.Apparatus according to claim 6, characterized in that the intermediate gear (20) is a crank gear. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Zwischengetriebe (20) als umlaufende Kurbelschleife ausgebildet ist.Apparatus according to claim 7, characterized in that the intermediate gear (20) is designed as a rotating crank loop. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass das Zwischengetriebe (20) ein mit dem Antriebsmotor (22) gekoppeltes, drehbar gelagertes Antriebsglied (21) aufweist, an dem ein zu seiner Drehachse (21') exzentrisches Mitnahmeelement (25), vorzugsweise eine Rolle, angeordnet ist, das in eine Nut (26) an einem drehbar gelagerten Abtriebsglied (27) eingreift, dessen Drehachse (27') gegenüber derjenigen des Antriebsgliedes (21) versetzt ist und das mit der Antriebswelle (14,43) des Antriebsmechanismus (5,31) verbunden ist.Apparatus according to claim 7 or 8, characterized in that the intermediate gear (20) has a rotatably mounted drive member (21) coupled to the drive motor (22), on which a driving element (25) eccentric to its axis of rotation (21 '), preferably a roller is arranged, which engages in a groove (26) on a rotatably mounted output member (27), the axis of rotation (27 ') of which is offset from that of the drive member (21) and that with the drive shaft (14, 43) of the drive mechanism (5.31) is connected. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass das Zwischengetriebe (20) ein drehbar gelagertes, mit der Antriebswelle (14,43) des Antriebsmechanismus (5,31) verbundenes Abtriebsglied (21) aufweist, an dem ein zu seiner Drehachse (21') exzentrisches Mitnahmeelement (25), vorzugsweise eine Rolle, angeordnet ist, das in eine Nut (26) an einem drehbar gelagerten, mit dem Antriebsmotor gekoppelten Antriebsglied (27) eingreift, dessen Drehachse (27') gegenüber derjenigen des Abtriebsgliedes (21) versetzt ist.Apparatus according to claim 7 or 8, characterized in that the intermediate gear (20) has a rotatably mounted output member (21) connected to the drive shaft (14, 43) of the drive mechanism (5, 31), on which an output member (21 ') eccentric driving element (25), preferably a roller, is arranged which engages in a groove (26) on a rotatably mounted drive member (27) coupled to the drive motor, the axis of rotation (27') of which of the output member (21) is offset. Vorrichtung nach einem der Ansprüche 4-10, dadurch gekennzeichnet, dass der Antriebsmechanismus (5,31) als Hebelgetriebe ausgebildet ist.Device according to one of claims 4-10, characterized in that the drive mechanism (5,31) is designed as a lever gear. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der den Saugkopf (4) in einer Richtung(U) entlang einer geschlossenen Bahn (6) bewegende Antriebsmechanismus (5) eine Kurbelschwinge (11) aufweist, deren Koppel (10b) einen vorzugsweise abgewinkelten Verlängerungsarm (10a) aufweist, an dem der Saugkopf (4) angebracht ist.Device according to claim 11, characterized in that the drive mechanism (5) moving the suction head (4) in one direction (U) along a closed path (6) has a crank arm (11), the coupling (10b) of which is preferably an angled extension arm ( 10a) on which the suction head (4) is attached. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der den Saugkopf (4) zwischen zwei Lagen (48,50) entlang im wesentlichen derselben Bahn (49) hin- und herbewegende Antriebsmechanismus (31) einen Hebel (32) aufweist, an dem der Saugkopf (4) befestigt ist und der gelenkig einerends mit einem schwenkbar gelagerten Schwinghebel (35) und andernends mit einem ebenfalls schwenkbar gelagerten weiteren Hebel (37) verbunden ist, der mit einem letzteren hin- und herschwingend antreibenden Kurbeltrieb (40,42) gekoppelt ist.Apparatus according to claim 11, characterized in that the drive mechanism (31) which reciprocates the suction head (4) between two layers (48, 50) along essentially the same path (49) has a lever (32) on which the suction head (4) is fastened and is connected in an articulated manner at one end to a pivotably mounted rocking lever (35) and at the other end to a likewise pivotably mounted further lever (37), which is coupled to a crank mechanism (40, 42) driving the latter to swing back and forth.
EP92121139A 1992-01-30 1992-12-11 Method and device for lifting printed products from a stack Expired - Lifetime EP0553455B1 (en)

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CH27492 1992-01-30

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DE19515506B4 (en) * 1994-05-31 2004-11-18 Ferag Ag Device for processing printed products
DE19603040B4 (en) * 1995-03-31 2006-05-24 Ferag Ag suction element

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CH690715A5 (en) * 1995-07-27 2000-12-29 Ferag Ag Conveyor for printed products.
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US7161511B2 (en) * 2005-06-03 2007-01-09 General Electric Company Linearization system and method
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DE19603040B4 (en) * 1995-03-31 2006-05-24 Ferag Ag suction element
DE19603040C5 (en) * 1995-03-31 2012-09-13 Ferag Ag suction element

Also Published As

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US5377967A (en) 1995-01-03
CA2088462A1 (en) 1993-07-31
JPH0624590A (en) 1994-02-01
DE59209254D1 (en) 1998-04-30
EP0553455B1 (en) 1998-03-25
JP2703474B2 (en) 1998-01-26

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