EP0655982B1 - Newspaper conveyor - Google Patents

Newspaper conveyor Download PDF

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Publication number
EP0655982B1
EP0655982B1 EP94919640A EP94919640A EP0655982B1 EP 0655982 B1 EP0655982 B1 EP 0655982B1 EP 94919640 A EP94919640 A EP 94919640A EP 94919640 A EP94919640 A EP 94919640A EP 0655982 B1 EP0655982 B1 EP 0655982B1
Authority
EP
European Patent Office
Prior art keywords
gripper jaw
newspaper
leaf spring
conveyor according
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94919640A
Other languages
German (de)
French (fr)
Other versions
EP0655982A1 (en
Inventor
Helmut Schmetzer
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.)
Gaemmerler Maschinenbau und Anlagentechnik GmbH
Original Assignee
Gaemmerler Maschinenbau und Anlagentechnik GmbH
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
Priority claimed from DE4320085A external-priority patent/DE4320085A1/en
Application filed by Gaemmerler Maschinenbau und Anlagentechnik GmbH filed Critical Gaemmerler Maschinenbau und Anlagentechnik GmbH
Publication of EP0655982A1 publication Critical patent/EP0655982A1/en
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Publication of EP0655982B1 publication Critical patent/EP0655982B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/003Delivering or advancing articles from machines; Advancing articles to or into piles by grippers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00Parts for holding the handled material
    • B65H2405/50Gripping means
    • B65H2405/58Means for achieving gripping/releasing operation

Definitions

  • the invention relates to a newspaper conveyor device according to the preamble of claim 1.
  • a newspaper conveyor device is known from GB-A-2 068 892.
  • Such newspaper conveyors are used for the rapid transport of newspapers or parts thereof between different processing stations, e.g. Folding station, insert insert station and bundling station within a newspaper printing plant.
  • a newspaper conveyor device a large number of grippers for each newspaper are used, with which the newspaper is clamped between a fixed and a movable gripper jaw and transported at high speed along a corresponding conveyor track.
  • the invention has for its object to improve a newspaper conveyor device of the generic type in terms of their grippers such that they can be used more variably while reducing the design effort.
  • a particularly advantageous embodiment of the subject matter of the invention is specified in claim 11.
  • the two-part design of the movable gripping jaw and the relative pivotability of the control part thus created in relation to the gripping jaw part enable a targeted and rapid initiation of the opening movement of the gripping jaw. This is because the control part with Can be deflected by means of a cam control curve on the conveyor track without initially having to work against the action of the leaf spring producing the closing pressure. Only when the maximum swivel angle of the control part relative to the gripping jaw part has been reached is the latter taken along by the control part and transferred into one of the opening positions against the pressure of the leaf spring. This means that every newspaper gripper can be easily and specifically opened even with very fast conveyor chains.
  • a newspaper conveyor device has an endless conveyor chain 1 which runs along a conveyor track 3 consisting of appropriately profiled rails 2.
  • the endless conveyor chain 1 consists of individual block-shaped chain links 4 which are connected to one another in an articulated manner by coupling links 5.
  • the chain links 4 run on rollers 6 in the conveyor track 3.
  • a gripper designated as a whole with 7 is arranged on the chain link 4 of the endless conveyor chain 1.
  • a large number of such grippers 7 are lined up relatively close together in the conveying direction F.
  • Each gripper 7 has a support part 8 for fastening the gripper 7 to the chain link 4. It is designed as a sheet metal stamped and bent part which is essentially U-shaped in cross section, the base 9 of which is fastened to the chain link 4.
  • a movable gripping jaw 11 is pivotably mounted approximately in the middle in front of the lower edge 12 of the cheeks 10 about a pivot axis 13 running transversely to the conveying direction F.
  • an approximately semicircular recess 15 extending from the lower edge 12 is provided in each of the two cheeks 10.
  • the cheeks 10 On the side of the recess 14 facing away from the pivot axis 13, the cheeks 10 each continue in one piece in short, curved extension pieces 15, on the free ends of which the fixed gripping jaws 16 arranged transversely to the conveying direction F are arranged.
  • the movable gripping jaw 11 is essentially L-shaped, one leg being formed by the solid bearing part 17 receiving the pivot axis 13 and the other leg being formed by the gripping arm 18.
  • the fixed gripper jaws 16 and the gripper arm 18 of the movable gripper jaw 11 cooperate, so that in the closed position shown in FIG. 1 with the aid of the right gripper 7, a newspaper 19 is held clamped between the two gripper jaws 11, 16.
  • the movable gripping jaw 11 is acted upon by a leaf spring 20 in the closing direction S.
  • the U-shaped curved leaf spring 20 is arranged in the support part 8 between its base 9 and the bearing part 17 of the movable gripping jaw 11.
  • the gripping jaw 11 is provided on its upper side with a contact surface 23 curved convexly about a bending axis parallel to the pivot axis 13 for the lower, second leg 22 of the leaf spring 20.
  • a torque in the closing direction S on the movable gripper jaw 11 is generated by the second, lower leg 22 of the leaf spring 20 via this contact surface 23, which causes the clamping force mentioned above.
  • the movable gripping jaw 11 itself has, at a distance from its pivot axis 13, a bolt 25 which projects transversely to the conveying direction F and which engages through a curved slot opening 26 in the cheek 10 of the support part 1. At the free end of the bolt 25, a roller 27 is attached. Bolt 25 and roller 27 form a cam follower for cam control curves to be described in more detail on the conveyor track, by means of which the closing and opening movement of the movable gripping jaw 11 can be controlled. This works as follows:
  • the movable gripping jaw 11 can be brought into a second open position, as shown in the left part of FIG. 1.
  • the movable gripping jaw 11 In this second open position, the movable gripping jaw 11 is held open in a self-locking manner by frictionally engaging its contact surface 23 with the second leg 22 of the leaf spring 20.
  • a cam control curve 30 shown in broken lines in FIG. 1 with a ramp 31 that is higher than the cam control curve 28 is necessary.
  • the opening angle W1 is accordingly also smaller than the opening angle W2 in the second opening position shown in the left part of FIG. 1.
  • the curvature of the contact surface 23 is designed relative to the pivot axis 13 such that as the opening angle of the movable gripper jaw 11 increases, the second leg 22 of the leaf spring 20 increasingly deflects in the direction of the first leg 21, as a result of which the force generated by the leaf spring increases on the movable gripping jaws.
  • the essentially linear contact area of the contact surface 23 of the movable gripper jaw 11 on the second leg 21 of the leaf spring 20 migrates when the gripper jaw 11 is transferred, in particular into the second open position, in the direction of the base 34 of the leaf spring 20, thereby reducing the lever arm with which the leaf spring 20 acts on the gripping jaws 11, shortened.
  • the second embodiment of a newspaper conveyor device according to the invention shown in FIGS. 3 to 11 in turn has individual newspaper grippers 7 'which are connected to an endless conveyor chain Analogous to FIGS. 1 and 2 are lined up and driven in the conveying direction F.
  • the supporting part 8 'and the leaf spring 20' essentially correspond to the corresponding components of the exemplary embodiment according to FIGS. 1 and 2 and therefore do not need to be explained again.
  • Further components of the second embodiment, which functionally correspond to those of the first embodiment, are identified by the same reference numerals with the addition of an apostrophe.
  • the movable gripping jaw 11 ' is formed in two parts and consists of the actual gripping jaw part 35 and a control part 36.
  • the outer shape of the gripping jaw part 35 corresponds to the gripping jaws 11 of the exemplary embodiment according to FIG. 1 and 2, thus has a bearing part 17 'which is pivotably mounted between the two cheeks 10' of the support part 8 'about a pivot axis 13' seated in its axis bore 39a.
  • the bearing part 17 ' continues in the gripping arm 18', at the free end of which lateral extensions 37 are attached.
  • the bearing part 17 'of the gripping jaw part 35 is provided with a central recess in its pivoting plane SE (FIG. 8) in the direction of the leaf spring 20 and laterally open recess 38, in which the control part 36 designed as a block is arranged and by means of a transverse to the conveying direction F extending axis bore 39 is also pivotally mounted about the pivot axis 13 'on the gripper jaw part 35.
  • the axis bores 39, 39a are arranged in the corner region of the bearing part 17 'or the control part 36 facing the gripping arm 18'.
  • the control part 36 is at a right angle to the conveying direction F laterally projecting bolt 25 ', which can be arranged either pointing to the left or right with respect to the conveying direction F.
  • This pin 25 ' passes through a curved slot opening 40, one of which is arranged in an aligned position in the two side cheeks 41, 42 of the gripping jaw part 35 delimiting the recess 38.
  • the center of curvature of the two elongated holes 40 lies in the pivot axis 13 '.
  • the end 43 of the elongated hole openings 40 pointing clockwise with respect to FIGS. 3 to 6 limits the pivoting angle between the control part 36 and the gripping jaw part 35 Control part 36 limited.
  • the bolt 25 ' also extends through the slot opening 40' covering the slot opening 40 'in the side cheeks 10' of the support part 8 '. With their center of curvature, the elongated hole openings 26 'likewise lie on the pivot axis 13' and sweep over an extension angle of 90 °.
  • the bolt 25 'acting as a cam follower with respect to the cam control cams used can be screwed in either from the left or the right into a corresponding threaded bore running transversely to the conveying direction F through the control part 36.
  • the position of the bolt 25 ' can be adapted to specific customer requirements.
  • the bolts of the newspaper grippers 7, 7 'in an endless conveyor chain 1 can be mounted so that they protrude only to the left, so that all newspaper grippers are opened with a cam control cam arranged on the left on the conveyor track 3.
  • the conveyor track 3 is attached to the left arranged cam control curve only every second newspaper gripper 7,7 'opened.
  • the newspaper grippers 7, 7 'provided with a bolt 25' projecting to the right can then be opened at another position on the conveyor track 3.
  • the control part 36 is spring-loaded relative to the gripping jaw part 35 in the closing direction S, for which purpose a helical compression spring 46 is inserted in two blind holes 47, 48 in the control part 36 or gripping jaw part 35.
  • the latter are arranged on the underside 45 of the control part 36 or in the bottom 44 of the recess 38 of the gripping jaw part 35 with mouth openings standing head to head.
  • the blind hole 47 in the control part 36 lies in the region between the pivot axis 13 'and the side surface 49 of the control part 36 facing the fixed gripping jaw 16'.
  • Fig. 3 the gripping jaw part 35 is shown in its closed position, which is maintained by the action of its contact surface 23 'by the leaf spring 20'.
  • the control part 36 rests with its underside 45 on the bottom 44 of the recess 38 under the influence of the helical compression spring 46.
  • the newspaper gripper passes a cam control curve (not shown in FIGS. 3 to 6), it detects the bolt 25 'serving as cam follower and deflects the control part 36 smoothly - since work only needs to be done against the influence of the relatively weak helical compression spring 46 - until the Bolt 25 'strikes the end 43 of the slot opening 40 in the gripper jaw part 35.
  • the gripping jaw part 35 is opened against the closing direction and against the action of the leaf spring 20'. Due to a relatively small pivoting of the control part 36 into the first open position analogous to the exemplary embodiment according to FIGS. 1 and 2, the gripping jaw part with its contact surface 23 'is not held in the open position in a self-locking manner. If the cam control curve 28 is omitted, the gripper jaw part closes again under the influence of the leaf spring 20 '.
  • the gripper jaw part 35 is pivoted so much that it reaches the second opening position analogous to the exemplary embodiment according to FIGS. 1 and 2 and is held in a self-locking manner with frictional engagement with the leaf spring 20 '( Fig. 4). If the cam control curve 30 disappears, the gripping jaw part 35 remains in the second open position, the control part 36 being able to pivot back under the influence of the helical compression spring 46 into the starting position with contact between its underside 45 and the bottom 44. In order to transfer the gripping jaw part 35 into the closed position, a corresponding cam control cam acting in reverse is to be provided.
  • the control part 36 and thus the gripper jaw part 35 are pivoted further into a third open position beyond the second open position (FIG. 6)
  • the contact surface 50 provided on the upper side of the control part 36 deforms the leaf spring 20 'so much that the contact surface 23 'of the gripper jaw part 35 is released.
  • the control part 36 is held open in a self-locking manner with frictional engagement with the leaf spring 20 '.
  • the gripping jaw part 35 can be pivoted relative to the control part 36 by the limited pivoting angle between these two components in the closing direction S against the action of the helical compression spring 46.
  • This embodiment is advantageous if the newspaper gripper moves in the conveying direction F over an underlying scale layer of newspapers and, for example, in the case of very thick newspapers - the gripper arm 18 'comes into contact with the newspapers. Due to its pivotability in the third open position, it can give in flexibly and does not mess up the scale.
  • the gripper jaw part 35 can be released by a corresponding cam control cam which detects the control part 36 via the pin 25 'and this together with the gripper jaw part 35 under the influence of the leaf spring 20' into the closed position (FIG. 3) spends.

Abstract

A newspaper conveyor has an endless conveyor chain (1) running along a conveyor (3) with a plurality of newspaper grips (7) in rows. Their movable clamp (11) may be set in two opening positions, a first one in which the movable clamp (11) is held open against the closing force of a spring (20) by a cam control curve (28) and a second in which the movable clamp (11) is self-lockingly held open by friction by the leaf spring (20).

Description

Die Erfindung betrifft eine Zeitungsfördervorrichtung nach dem Oberbegriff des Patentanspruchs 1. Eine solche Vorrichtung ist aus GB-A-2 068 892 bekannt.The invention relates to a newspaper conveyor device according to the preamble of claim 1. Such a device is known from GB-A-2 068 892.

Derartige Zeitungsfördervorrichtungen dienen zum schnellen Transport von Zeitungen oder Teilen davon zwischen verschiedenen Bearbeitungsstationen, wie z.B. Faltstation, Beilagen-Einlegestation und Bündelstation innerhalb einer Zeitungsdruckerei. Bei einer solchen Zeitungsfördervorrichtung kommt eine Vielzahl von Greifern für jeweils eine Zeitung zum Einsatz, mit denen die Zeitung jeweils zwischen einem feststehenden und einem beweglichen Greifbacken eingeklemmt, mit hoher Geschwindigkeit entlang einer entsprechenden Förderbahn weitertransportiert werden.Such newspaper conveyors are used for the rapid transport of newspapers or parts thereof between different processing stations, e.g. Folding station, insert insert station and bundling station within a newspaper printing plant. In such a newspaper conveyor device, a large number of grippers for each newspaper are used, with which the newspaper is clamped between a fixed and a movable gripper jaw and transported at high speed along a corresponding conveyor track.

Für die Greifer sind verschiedene Konstruktionen bekannt, die in konstruktiver und betätigungstechnischer Hinsicht durchweg relativ aufwendig sind. So sind Konstruktionen bekannt, die den beweglichen Greifbacken über einen aufwendigen Schraubenfedermechanismus betätigen, der in Öffnungsstellung des beweglichen Greifbackens diesen verriegelt. Weiterhin sind Konstruktionen auf dem Markt, bei dem der bewegliche Greifbacken beim Öffnen und Schließen eine Schwenk bewegung nicht nur um eine, sondern um zwei aufeinander etw rechtwinklig stehende Schwenkachsen vollführt.Various constructions are known for the grippers, all of which are relatively complex in terms of construction and actuation technology. Thus, constructions are known which actuate the movable gripping jaw via a complex coil spring mechanism which locks the movable gripping jaw in the open position. There are also designs on the market in which the movable Gripping jaws perform a swiveling movement not only around one but two swivel axes that are at right angles to each other when opening and closing.

Der Erfindung liegt die Aufgabe zugrunde, eine Zeitungsfördervorrichtung der gattungsgemäßen Art hinsichtlich ihrer Greifer derart zu verbessern, daß diese unter Verringerung des konstruktiven Aufwandes variabler einsetzbar sind.The invention has for its object to improve a newspaper conveyor device of the generic type in terms of their grippers such that they can be used more variably while reducing the design effort.

Diese Aufgabe wird durch die im Kennzeichnungsteil des Anspruchs 1 angegebenen Merkmale gelöst. Demnach kann beim Einsatz der Greifer zwischen den beiden angegebenen Öffnungsstellungen gewählt werden, insofern kann - wenn beispielsweise nur ein kurzes Öffnen des Greifers gewünscht ist - über eine entsprechende Nockensteuerkurve dieser nur während einer kleinen Zeitspanne geöffnet werden, um die Zeitung frei zu geben und anschließend in seiner geschlossenen Stellung, jedoch leer weiterzufahren. Falls der bewegliche Greifbacken geöffnet bleiben soll, so braucht er nur in die zweite Öffnungsstellung übergeführt zu werden, in der er in konstruktiv besonders einfacher Hinsicht selbsthemmend unter Reibschluß mit einer als Blattfeder ausgebildeten Klemmfeder offengehalten ist. Es entfällt also ein aufwendiger Verriegelungsmechanismus für den beweglichen Greifbacken in seiner Öffnungsstellung.This object is achieved by the features specified in the characterizing part of claim 1. Accordingly, when using the grippers, you can choose between the two specified opening positions, so that - if, for example, only a short opening of the gripper is desired - it can only be opened over a corresponding cam control curve for a short period of time in order to release the newspaper and then in continue in its closed position, but empty. If the movable gripping jaw is to remain open, it only needs to be transferred to the second opening position, in which it is kept open in a structurally particularly simple way, self-locking under frictional engagement with a clamping spring designed as a leaf spring. There is therefore no need for a complex locking mechanism for the movable gripping jaw in its open position.

Eine besonders vorteilhafte Ausführungsform des Erfindungsgegenstandes ist im Anspruch 11 angegeben. Durch die zweiteilige Ausbildung des beweglichen Greifbackens und die relative Verschwenkbarkeit des damit geschaffenen Steuerteils gegenüber dem Greifbackenteil ist eine gezielte und schnelle Einleitung der Öffnungsbewegung des Greifbackens möglich. Dies ist darin begründet, daß das Steuerteil mit Hilfe einer Nockensteuerkurve an der Förderbahn ausgelenkt werden kann, ohne anfänglich gegen die Beaufschlagung der den Schließdruck herstellenden Blattfeder arbeiten zu müssen. Erst wenn der maximale Schwenkwinkel des Steuerteils gegenüber dem Greifbackenteil erreicht ist, wird letzteres vom Steuerteil mitgenommen und in eine der Öffnungsstellungen gegen den Druck der Blattfeder übergeführt. Damit läßt sich jeder Zeitungsgreifer auch bei sehr schnell laufenden Förderketten problemlos und gezielt öffnen.A particularly advantageous embodiment of the subject matter of the invention is specified in claim 11. The two-part design of the movable gripping jaw and the relative pivotability of the control part thus created in relation to the gripping jaw part enable a targeted and rapid initiation of the opening movement of the gripping jaw. This is because the control part with Can be deflected by means of a cam control curve on the conveyor track without initially having to work against the action of the leaf spring producing the closing pressure. Only when the maximum swivel angle of the control part relative to the gripping jaw part has been reached is the latter taken along by the control part and transferred into one of the opening positions against the pressure of the leaf spring. This means that every newspaper gripper can be easily and specifically opened even with very fast conveyor chains.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den übrigen Unteransprüchen und der nachfolgenden Beschreibung von Ausführungsbeispielen des Erfindungsgegenstandes anhand der beigefügten Zeichnungen. Es zeigt

Fig. 1
eine schematische Teil-Seitenansicht einer erfindungsgemäßen Zeitungsfördervorrichtung mit zwei Greifern in Schließ- bzw. selbsthemmend offengehaltener Öffnungsstellung.
Fig. 2
eine schematische Teil-Seitenansicht der Vorrichtung nach Fig. 1 mit dem Greifer in einer von einer Nockensteuerkurve offengehaltenen Öffnungsstellung des beweglichen Greifbackens.
Fig. 3
bis 6 in der Schwenkebene des beweglichen Greifbackens angelegte Schnitte durch Zeitungsgreifer einer zweiten Ausführungsform in Schließ- bzw. verschiedenen Öffnungsstellungen.
Fig. 7
einen in der Schwenkebene angelegten Schnitt durch ein Greifbackenteil des Zeitungsgreifers gemäß den Fig. 3 bis 6.
Fig. 8
eine Ansicht des Greifbackenteils aus Pfeilrichtung VIII gemäß Fig. 7.
Fig. 9
eine teilweise geschnittene Seitenansicht eines Steuerteils des Zeitungsgreifers gemäß den Fig. 3 bis 6.
Fig.10
einen in der Schwenkebene angelegten Schnitt durch ein Tragteil des Zeitungsgreifers gemäß den Fig. 3 bis 6 und
Fig. 11
eine Ansicht des Tragteils aus Pfeilrichtung XI gemäß Fig. 10.
Further features, details and advantages of the invention emerge from the remaining subclaims and the following description of exemplary embodiments of the subject matter of the invention with reference to the accompanying drawings. It shows
Fig. 1
is a schematic partial side view of a newspaper conveyor device according to the invention with two grippers in the closed or self-locking open position.
Fig. 2
is a schematic partial side view of the device of FIG. 1 with the gripper in an open position of the movable gripping jaw held open by a cam control curve.
Fig. 3
to 6 cuts made in the pivoting plane of the movable gripping jaw by newspaper grippers of a second embodiment in closed or different open positions.
Fig. 7
a section created in the swivel plane through a gripping jaw part of the newspaper gripper according to FIGS. 3 to 6.
Fig. 8
7 shows a view of the gripping jaw part from arrow direction VIII according to FIG. 7.
Fig. 9
a partially sectioned side view of a control part of the newspaper gripper according to FIGS. 3 to 6.
Fig. 10
a section created in the pivot plane through a support member of the newspaper gripper according to FIGS. 3 to 6 and
Fig. 11
10 shows a view of the supporting part from the direction of the arrow XI according to FIG. 10.

Eine erfindungsgemäße Zeitungsfördervorrichtung weist in der in Fig. 1 und 2 dargestellten Ausführungsform eine Endlosförderkette 1 auf, die entlang einer aus entsprechend profilierten Schienen 2 bestehenden Förderbahn 3 läuft. Die Endlosförderkette 1 besteht aus einzelnen blockförmigen Kettengliedern 4, die durch Kopplungsglieder 5 gelenkig miteinander verbunden sind. Die Kettenglieder 4 laufen auf Rollen 6 in der Förderbahn 3.In the embodiment shown in FIGS. 1 and 2, a newspaper conveyor device according to the invention has an endless conveyor chain 1 which runs along a conveyor track 3 consisting of appropriately profiled rails 2. The endless conveyor chain 1 consists of individual block-shaped chain links 4 which are connected to one another in an articulated manner by coupling links 5. The chain links 4 run on rollers 6 in the conveyor track 3.

An dem Kettenglied 4 der Endlosförderkette 1 ist ein als Ganzes mit 7 bezeichneter Greifer angeordnet. Bezogen auf die Endlosförderkette ist also eine Vielzahl von solchen Greifern 7 relativ dicht in Förderrichtung F aneinerandergereiht.On the chain link 4 of the endless conveyor chain 1, a gripper designated as a whole with 7 is arranged. In relation to the endless conveyor chain, a large number of such grippers 7 are lined up relatively close together in the conveying direction F.

Jeder Greifer 7 weist ein Tragteil 8 zur Befestigung des Greifers 7 am Kettenglied 4 auf. Es ist als ein im Querschnitt im wesentlichen U-förmiges Blech-Stanz-Biegeteil ausgebildet, dessen Basis 9 am Kettenglied 4 befestigt ist. Zwischen den in Seitenansicht im wesentlichen rechteckförmigen, quer zur Förderrichtung F fluchtenden Wangen 10 ist ein beweglicher Greifbacken 11 etwa mittig vor dem unteren Rand 12 der Wangen 10 um eine quer zur Förderrichtung F verlaufende Schwenkachse 13 schwenkbar gelagert. Seitlich neben der Schwenkachse 13 ist in den beiden Wangen 10 jeweils eine vom unteren Rand 12 ausgehende, etwa halbkreisförmige Aussparung 15 vorgesehen. An der der Schwenkachse 13 abgewandten Seite der Aussparung 14 setzen sich die Wangen 10 jeweils in kurze, gebogene Verlängerungsstücke 15 einstückig fort, an deren freien Enden der quer zur Förderrichtung F verlaufende, feststehende Greifbacken 16 angeordnet ist.Each gripper 7 has a support part 8 for fastening the gripper 7 to the chain link 4. It is designed as a sheet metal stamped and bent part which is essentially U-shaped in cross section, the base 9 of which is fastened to the chain link 4. Between the cheeks 10, which are substantially rectangular in side view and aligned transversely to the conveying direction F, a movable gripping jaw 11 is pivotably mounted approximately in the middle in front of the lower edge 12 of the cheeks 10 about a pivot axis 13 running transversely to the conveying direction F. To the side of the pivot axis 13, an approximately semicircular recess 15 extending from the lower edge 12 is provided in each of the two cheeks 10. On the side of the recess 14 facing away from the pivot axis 13, the cheeks 10 each continue in one piece in short, curved extension pieces 15, on the free ends of which the fixed gripping jaws 16 arranged transversely to the conveying direction F are arranged.

Der bewegliche Greifbacken 11 ist im wesentlichen L-förmig ausgebildet, wobei der eine Schenkel von dem massiven, die Schwenkachse 13 aufnehmenden Lagerteil 17 und der andere Schenkel von dem Greifarm 18 gebildet sind. Der feststehende Greifbacken 16 und der Greifarm 18 des beweglichen Greifbackens 11 wirken zusammen, so daß in der in Fig. 1 anhand des rechten Greifers 7 gezeigten Schließstellung zwischen den beiden Greifbacken 11, 16 eine Zeitung 19 eingeklemmt gehalten wird. Zur Erzeugung der Klemmkraft ist der bewegliche Greifbacken 11 von einer Blattfeder 20 in Schließrichtung S beaufschlagt. Die U-förmig gebogene Blattfeder 20 ist im Tragteil 8 zwischen dessen Basis 9 und dem Lagerteil 17 des beweglichen Greifbackens 11 angeordnet. Mit ihrem oberen bzw. unteren Schenkel 21, 22 stützt sie sich an der Basis 9 des Tragteils 8 bzw. dem Lagerteil 17 des beweglichen Greifbackens 11 ab. Dabei ist das Lagerteil 17 des beweglichen Greifbackens 11 an seiner Oberseite mit einer konvex um eine zur Schwenkachse 13 parallelen Biegeachse gekrümmten Anlagefläche 23 für den unteren, zweiten Schenkel 22 der Blattfeder 20 versehen. Über diese Anlagefläche 23 wird von dem zweiten, unteren Schenkel 22 der Blattfeder 20 ein Drehmoment in Schließrichtung S am beweglichen Greifbacken 11 erzeugt, womit oben besagte Klemmkraft hervorgerufen wird.The movable gripping jaw 11 is essentially L-shaped, one leg being formed by the solid bearing part 17 receiving the pivot axis 13 and the other leg being formed by the gripping arm 18. The fixed gripper jaws 16 and the gripper arm 18 of the movable gripper jaw 11 cooperate, so that in the closed position shown in FIG. 1 with the aid of the right gripper 7, a newspaper 19 is held clamped between the two gripper jaws 11, 16. To generate the clamping force, the movable gripping jaw 11 is acted upon by a leaf spring 20 in the closing direction S. The U-shaped curved leaf spring 20 is arranged in the support part 8 between its base 9 and the bearing part 17 of the movable gripping jaw 11. With its upper or lower legs 21, 22, it is supported on the base 9 of the support part 8 or the bearing part 17 of the movable gripping jaw 11. The bearing part 17 is movable The gripping jaw 11 is provided on its upper side with a contact surface 23 curved convexly about a bending axis parallel to the pivot axis 13 for the lower, second leg 22 of the leaf spring 20. A torque in the closing direction S on the movable gripper jaw 11 is generated by the second, lower leg 22 of the leaf spring 20 via this contact surface 23, which causes the clamping force mentioned above.

Weiterhin ist der untere Schenkel 22 der Blattfeder 20 an seinem Ende mit einem zum ersten Schenkel 21 hinweisenden Anschlagsteg 24 versehen, dessen Funktion noch näher beschrieben wird. Der bewegliche Greifbacken 11 selbst weist mit Abstand von seiner Schwenkachse 13 einen quer zur Förderrichtung F abstehenden Bolzen 25 auf, der eine gekrümmte Langlochöffnung 26 in der Wange 10 des Tragteils 1 durchgreift. Am freien Ende des Bolzens 25 ist eine Laufrolle 27 befestigt. Bolzen 25 und Laufrolle 27 bilden einen Nockenfolger für noch näher zu beschreibende Nockensteuerkurven an der Förderbahn, mittels denen die Schließ- und Öffnungsbewegung des beweglichen Greifbackens 11 steuerbar ist. Dies funktioniert wie folgt:Furthermore, the lower leg 22 of the leaf spring 20 is provided at its end with a stop web 24 pointing towards the first leg 21, the function of which is described in more detail below. The movable gripping jaw 11 itself has, at a distance from its pivot axis 13, a bolt 25 which projects transversely to the conveying direction F and which engages through a curved slot opening 26 in the cheek 10 of the support part 1. At the free end of the bolt 25, a roller 27 is attached. Bolt 25 and roller 27 form a cam follower for cam control curves to be described in more detail on the conveyor track, by means of which the closing and opening movement of the movable gripping jaw 11 can be controlled. This works as follows:

Ausgehend von der in Fig. 1, rechter Teil, gezeigten Schließstellung des Greifers 7 kann dessen beweglicher Greifbacken 11 mittels der in Fig. 2 schematisch dargestellten, rampenartige Nockensteuerkurve 28 in die in dieser Figur gezeigte erste Öffnungsstellung verbracht werden, in der der bewegliche Greifbacken 11 gegen die Schließkraft der Blattfeder 20 mittels einer dauernden Unterstützung durch den (in Fig.2 der Deutlichkeit halber weggebrochen dargestellten) horizontalen Teil 29 der Nockensteuerkurve 28 offengehalten ist. Sobald die Unterstützung durch die Nockensteuerkurve 28 wegfällt, schließt sich der bewegliche Greifbacken 11 selbsttätig unter dem Einfluß der Blattfeder 20.Starting from the closed position of the gripper 7 shown on the right in FIG. 1, its movable gripping jaws 11 can be brought into the first opening position shown in this figure by means of the ramp-like cam control curve 28 shown schematically in FIG. 2, in which the movable gripping jaw 11 is kept open against the closing force of the leaf spring 20 by means of continuous support by the horizontal part 29 of the cam control curve 28 (shown broken away in FIG. 2 for the sake of clarity). Once supported by the cam control curve 28 falls away, the movable gripper jaw 11 closes automatically under the influence of the leaf spring 20th

Alternativ dazu ist der bewegliche Greifbacken 11 in eine zweite Öffnungsstellung verbringbar, wie sie im linken Teil der Fig. 1 gezeigt ist. In dieser zweiten Öffnungsstellung ist der bewegliche Greifbacken 11 selbsthemmend unter Reibschluß seiner Anlagefläche 23 mit dem zweiten Schenkel 22 der Blattfeder 20 offengehalten. Zum Überführen des beweglichen Greifbackens 11 in diese zweite Öffnungsstellung ist eine in Fig. 1 strichliert dargestellte Nockensteuerkurve 30 mit einer gegenüber der Nockensteuerkurve 28 höheren Rampe 31 notwendig. In der in Fig. 2 gezeigten ersten Öffnungsstellung ist demnach der Öffnungswinkel W1 auch kleiner als der Öffnungswinkel W2 in der im linken Teil der Fig. 1 dargestellten zweiten Öffnungsstellung.Alternatively, the movable gripping jaw 11 can be brought into a second open position, as shown in the left part of FIG. 1. In this second open position, the movable gripping jaw 11 is held open in a self-locking manner by frictionally engaging its contact surface 23 with the second leg 22 of the leaf spring 20. In order to transfer the movable gripping jaw 11 into this second open position, a cam control curve 30 shown in broken lines in FIG. 1 with a ramp 31 that is higher than the cam control curve 28 is necessary. In the first opening position shown in FIG. 2, the opening angle W1 is accordingly also smaller than the opening angle W2 in the second opening position shown in the left part of FIG. 1.

Beim Überführen des beweglichen Greifbackens 11 von der Schließstellung (rechter Teil von Fig. 1) in die zweite Öffnungsstellung (linker Teil der Fig. 1) schlägt der zweite Schenkel 22 der Blattfeder 20 mit seinem Anschlagsteg 24 an den ersten Schenkel 21 an. Dies erfolgt etwa bei einem Öffnungswinkel W1, wie er in Fig. 2 gezeigt ist. Beim weiteren Verschwenken des beweglichen Greifbackens 16 wird der zweite Schenkel 22 der Blattfeder 20 in sich elastisch deformiert, wodurch die Reibung zwischen der Anlagefläche 23 und diesem Schenkel 22 in einem Maß erhöht wird, daß durch den Reibschluß eine Selbsthemmung des beweglichen Greifbackens 11 in der in Fig.1, linker Teil, gezeigten zweiten Öffnungsstellung stattfindet. Zur Aufrechterhaltung dieser Öffnungsstellung ist also keine Unterstützung durch die Nockensteuerkurve 30 mehr notwendig.When the movable gripper jaw 11 is transferred from the closed position (right part of FIG. 1) to the second open position (left part of FIG. 1), the second leg 22 of the leaf spring 20 strikes the first leg 21 with its stop web 24. This takes place approximately at an opening angle W1, as shown in FIG. 2. When pivoting the movable gripper jaw 16, the second leg 22 of the leaf spring 20 is elastically deformed in itself, whereby the friction between the contact surface 23 and this leg 22 is increased to an extent that the self-locking of the movable gripper jaw 11 in the in Fig. 1, left part, shown second opening takes place. In order to maintain this open position, support by the cam control curve 30 is therefore no longer necessary.

Soll ausgehend von dieser Öffnungsstellung der bewegliche Greifbacken 11 wieder in seine Schließstellung übergeführt werden, ist eine gesonderte Nockensteuerkurve 32 mit entgegengesetzt gerichteter Rampe 33 notwendig, mittels der der Reibschluß zwischen der Anlagefläche des beweglichen Greifbackens 11 und dem Schenkel 22 der Blattfeder 20 wieder aufgehoben und anschließend der Greifbacken 11 selbsttätig unter Einfluß der Blattfeder 20 in die in Fig. 1, rechter Teil, gezeigte Schließstellung verbracht wird.If, starting from this open position, the movable gripper jaws 11 are to be returned to its closed position, a separate cam control curve 32 with an oppositely directed ramp 33 is necessary, by means of which the frictional engagement between the contact surface of the movable gripper jaw 11 and the leg 22 of the leaf spring 20 is canceled and then the gripping jaws 11 is automatically moved under the influence of the leaf spring 20 into the closed position shown in FIG. 1, right part.

Es ist darauf hinzuweisen, daß die Krümmung der Anlagefläche 23 relativ zur Schwenkachse 13 derart ausgestaltet ist, daß mit wachsendem Öffnungswinkel des beweglichen Greifbackens 11 der zweite Schenkel 22 der Blattfeder 20 zunehmend in Richtung zum ersten Schenkel 21 einfedert, wodurch die von der Blattfeder erzeugte Kraft auf den beweglichen Greifbacken sich erhöht. Gleichzeitig wandert der im wesentlichen linienförmige Anlagebereich der Anlagefläche 23 des beweglichen Greifbackens 11 am zweiten Schenkel 21 der Blattfeder 20 beim Überführen des Greifbackens 11 insbesondere in die zweite Öffnungsstellung in Richtung der Basis 34 der Blattfeder 20, wodurch sich der Hebelarm, mit dem die Blattfeder 20 auf den Greifbacken 11 wirkt, verkürzt. Da zudem die seitliche Abweichung der Wirkungslinie der von der Blattfeder 20 auf den Greifbacken 11 übertragenen Kraft bezüglich der Schwenkachse 13 in dieser Stellung minimal ist, reicht der Reibschluß zwischen Greifbacken 11 und Blattfeder 20 aus, um den Greifbacken 11 in der in Fig. 1, linker Teil gezeigten Öffnungsstellung zu halten.It should be noted that the curvature of the contact surface 23 is designed relative to the pivot axis 13 such that as the opening angle of the movable gripper jaw 11 increases, the second leg 22 of the leaf spring 20 increasingly deflects in the direction of the first leg 21, as a result of which the force generated by the leaf spring increases on the movable gripping jaws. At the same time, the essentially linear contact area of the contact surface 23 of the movable gripper jaw 11 on the second leg 21 of the leaf spring 20 migrates when the gripper jaw 11 is transferred, in particular into the second open position, in the direction of the base 34 of the leaf spring 20, thereby reducing the lever arm with which the leaf spring 20 acts on the gripping jaws 11, shortened. In addition, since the lateral deviation of the line of action of the force transmitted from the leaf spring 20 to the gripping jaws 11 with respect to the pivot axis 13 is minimal in this position, the frictional engagement between the gripping jaws 11 and the leaf spring 20 is sufficient to grip the gripping jaws 11 in FIG. to keep left part shown opening position.

Die in den Fig. 3 bis 11 dargestellte zweite Ausführungsform einer erfindungsgemäßen Zeitungsfördervorrichtung weist wiederum einzelne Zeitungsgreifer 7' auf, die an einer Endlosförderkette analog den Fig. 1 und 2 aneinandergereiht und in Förderrichtung F angetrieben sind. Das Tragteil 8' und die Blattfeder 20' stimmen im wesentlichen mit den entsprechenden Bauteilen des Ausführungsbeispiels gemäß den Fig. 1 und 2 überein und bedürfen daher keiner nochmaligen Erläuterung. Auch sind weitere Bauteile der zweiten Ausführungsform, die funktional mit denen der ersten Ausführungsform übereinstimmen mit gleichen Bezugsziffern unter Hinzufügung eines Apostrophes bezeichnet.The second embodiment of a newspaper conveyor device according to the invention shown in FIGS. 3 to 11 in turn has individual newspaper grippers 7 'which are connected to an endless conveyor chain Analogous to FIGS. 1 and 2 are lined up and driven in the conveying direction F. The supporting part 8 'and the leaf spring 20' essentially correspond to the corresponding components of the exemplary embodiment according to FIGS. 1 and 2 and therefore do not need to be explained again. Further components of the second embodiment, which functionally correspond to those of the first embodiment, are identified by the same reference numerals with the addition of an apostrophe.

Im Unterschied zu dem Ausführungsbeispiel gemäß den Fig. 1 und 2 ist der bewegliche Greifbacken 11' jedoch zweiteilig ausgebildet und besteht aus dem eigentlichen Greifbackenteil 35 und einem Steuerteil 36. Das Greifbackenteil 35 entspricht in seiner Außenform den Greifbacken 11 des Ausführungsbeispiels nach den Fig. 1 und 2, weist also ein Lagerteil 17' auf, das zwischen den beiden Wangen 10' des Tragteils 8' um eine in seiner Achsbohrung 39a sitzenden Schwenkachse 13' schwenkbar gelagert ist. Das Lagerteil 17' setzt sich in dem Greifarm 18' fort, an dessen freiem Ende seitliche Verlängerungen 37 angebracht sind. Weiterhin ist das Lagerteil 17' des Greifbackenteils 35 mit einer in seiner Schwenkebene SE (Fig. 8) verlaufenden, zentralen in Richtung zur Blatteder 20 und seitlich offenen Ausnehmung 38 versehen, in der das als Block ausgebildete Steuerteil 36 angeordnet und mittels einer quer zur Förderrichtung F verlaufenden Achsbohrung 39 ebenfalls schwenkbar um die Schwenkachse 13' am Greifbackenteil 35 gelagert ist.In contrast to the exemplary embodiment according to FIGS. 1 and 2, however, the movable gripping jaw 11 'is formed in two parts and consists of the actual gripping jaw part 35 and a control part 36. The outer shape of the gripping jaw part 35 corresponds to the gripping jaws 11 of the exemplary embodiment according to FIG. 1 and 2, thus has a bearing part 17 'which is pivotably mounted between the two cheeks 10' of the support part 8 'about a pivot axis 13' seated in its axis bore 39a. The bearing part 17 'continues in the gripping arm 18', at the free end of which lateral extensions 37 are attached. Furthermore, the bearing part 17 'of the gripping jaw part 35 is provided with a central recess in its pivoting plane SE (FIG. 8) in the direction of the leaf spring 20 and laterally open recess 38, in which the control part 36 designed as a block is arranged and by means of a transverse to the conveying direction F extending axis bore 39 is also pivotally mounted about the pivot axis 13 'on the gripper jaw part 35.

Die Achsbohrungen 39,39a sind dabei in den dem Greifarm 18' zugewandten Eckbereich des Lagerteiles 17' bzw. des Steuerteils 36 angeordnet in dem diametral gegenüberliegenden Randbereich ist das Steuerteil 36 mit einem quer zur Förderrichtung F seitlich abstehenden Bolzen 25' versehen, der wahlweise nach links oder rechts bezüglich der Förderrichtung F weisend angeordnet sein kann. Dieser Bolzen 25' durchgreift eine gekrümmte Langlochöffnung 40, von denen jeweils eine in miteinander fluchtender Position in den beiden die Ausnehmung 38 begrenzenden Seitenwangen 41,42 des Greifbackenteils 35 angeordnet ist. Der Krümmungsmittelpunkt der beiden Langlochöffnungen 40 liegt in der Schwenkachse 13'. Das im Uhrzeigersinn bezüglich der Fig. 3 bis 6 weisende Ende 43 der Langlochöffnungen 40 begrenzt den Schwenkwinkel zwischen dem Steuerteil 36 und dem Greifbackenteil 35. In die entgegengesetzte Richtung ist der Schwenkwinkel durch die in Anlage an den Boden 44 der Ausnehmung 38 gelangenden Unterseite 45 des Steuerteils 36 begrenzt. Der Bolzen 25' durchgreift weiterhin die die Langlochöffnung 40 überdeckende Langlochöffnung 26' in den Seitenwangen 10' des Tragteils 8'. Die Langlochöffnungen 26' liegen mit ihrem Krümmungsmittelpunkt ebenfalls auf der Schwenkachse 13' und überstreichen einen Erstreckungswinkel von 90°.The axis bores 39, 39a are arranged in the corner region of the bearing part 17 'or the control part 36 facing the gripping arm 18'. In the diametrically opposite edge region, the control part 36 is at a right angle to the conveying direction F laterally projecting bolt 25 ', which can be arranged either pointing to the left or right with respect to the conveying direction F. This pin 25 'passes through a curved slot opening 40, one of which is arranged in an aligned position in the two side cheeks 41, 42 of the gripping jaw part 35 delimiting the recess 38. The center of curvature of the two elongated holes 40 lies in the pivot axis 13 '. The end 43 of the elongated hole openings 40 pointing clockwise with respect to FIGS. 3 to 6 limits the pivoting angle between the control part 36 and the gripping jaw part 35 Control part 36 limited. The bolt 25 'also extends through the slot opening 40' covering the slot opening 40 'in the side cheeks 10' of the support part 8 '. With their center of curvature, the elongated hole openings 26 'likewise lie on the pivot axis 13' and sweep over an extension angle of 90 °.

Der als Nockenfolger bezüglich der zum Einsatz kommenden Nockensteuerkurven wirkende Bolzen 25' kann dabei wahlweise von links oder rechts in eine entsprechende, quer zur Förderrichtung F durch das Steuerteil 36 verlaufende Gewindebohrung eingeschraubt werden. Insofern kann die Stellung des Bolzens 25' jeweiligen Kundenwünschen angepaßt werden. So können beispielsweise die Bolzen der Zeitungsgreifer 7,7' in einer Endlosförderkette 1 nur nach links abstehend montiert sein, so daß mit einer links an der Förderbahn 3 angeordneten Nockensteuerkurve alle Zeitungsgreifer geöffnet werden. Sind die Bolzen 25' bei aufeinanderfolgenden Zeitungsgreifern 7,7' jeweils abwechselnd nach links und rechts abstehend montiert, so wird mit einer links der Förderbahn 3 angeordneten Nockensteuerkurve nur jeder zweite Zeitungsgreifer 7,7' geöffnet. Die mit einem nach rechts abstehenden Bolzen 25' versehenen Zeitungsgreifer 7,7' können anschließend an einer anderen Position der Förderbahn 3 geöffnet werden.The bolt 25 'acting as a cam follower with respect to the cam control cams used can be screwed in either from the left or the right into a corresponding threaded bore running transversely to the conveying direction F through the control part 36. In this respect, the position of the bolt 25 'can be adapted to specific customer requirements. For example, the bolts of the newspaper grippers 7, 7 'in an endless conveyor chain 1 can be mounted so that they protrude only to the left, so that all newspaper grippers are opened with a cam control cam arranged on the left on the conveyor track 3. If the bolts 25 'in successive newspaper grippers 7, 7' are mounted alternately projecting to the left and right, the conveyor track 3 is attached to the left arranged cam control curve only every second newspaper gripper 7,7 'opened. The newspaper grippers 7, 7 'provided with a bolt 25' projecting to the right can then be opened at another position on the conveyor track 3.

Genausogut kann mit einer entsprechenden Anordnung der Bolzen 25' nach links und rechts an einer Stelle der Förderbahn nur jeder dritte Zeitungsgreifer geöffnet werden. Auch eine nachträgliche Änderung des Öffnungsverhaltens im Bereich einer Nockensteuerkurve ist durch eine Ummontage der Bolzen 25' möglich.Just as well, with a corresponding arrangement of the bolts 25 'to the left and right at one point on the conveyor track, only every third newspaper gripper can be opened. A subsequent change in the opening behavior in the area of a cam control curve is also possible by retrofitting the bolts 25 '.

Das Steuerteil 36 ist relativ zum Greifbackenteil 35 in Schließrichtung S federbeaufschlagt, wozu eine Schraubendruckfeder 46 in zwei Sacklochbohrungen 47,48 im Steuerteil 36 bzw. Greifbackenteil 35 eingesetzt ist. Letzere sind an der Unterseite 45 des Steuerteils 36 bzw. im Boden 44 der Ausnehmung 38 des Greifbackenteils 35 mit Kopf an Kopf stehenden Mündungsöffnungen angeordnet. Die Sacklochbohrung 47 im Steuerteil 36 liegt dabei im Bereich zwischen der Schwenkachse 13' und der dem festen Greifbacken 16' zugewandten Seitenfläche 49 des Steuerteils 36.The control part 36 is spring-loaded relative to the gripping jaw part 35 in the closing direction S, for which purpose a helical compression spring 46 is inserted in two blind holes 47, 48 in the control part 36 or gripping jaw part 35. The latter are arranged on the underside 45 of the control part 36 or in the bottom 44 of the recess 38 of the gripping jaw part 35 with mouth openings standing head to head. The blind hole 47 in the control part 36 lies in the region between the pivot axis 13 'and the side surface 49 of the control part 36 facing the fixed gripping jaw 16'.

Die Funktionsweise des in den Fig. 5 bis 11 dargestellten Zeitungsgreifers 7' stellt sich wie folgt dar.The operation of the newspaper gripper 7 'shown in FIGS. 5 to 11 is as follows.

In Fig. 3 ist das Greifbackenteil 35 in seiner geschlossenen Stellung gezeigt, die durch die Beaufschlagung seiner Anlagefläche 23' durch die Blattfeder 20' aufrecht erhalten ist. Das Steuerteil 36 liegt dabei mit seiner Unterseite 45 am Boden 44 der Ausnehmung 38 unter dem Einfluß der Schraubendruckfeder 46 an.In Fig. 3, the gripping jaw part 35 is shown in its closed position, which is maintained by the action of its contact surface 23 'by the leaf spring 20'. The control part 36 rests with its underside 45 on the bottom 44 of the recess 38 under the influence of the helical compression spring 46.

Passiert der Zeitungsgreifer eine in den Fig. 3 bis 6 nicht dargestellte Nockensteuerkurve, so erfaßt diese den als Nockenfolger dienenden Bolzen 25' und lenkt das Steuerteil 36 leichtgängig - da nur gegen den Einfluß der relativ schwachen Schraubendruckfeder 46 gearbeitet werden muß - aus, bis der Bolzen 25' an das Ende 43 der Langlochöffnung 40 im Greifbackenteil 35 anschlägt. Bei einer weiteren Anhebung des Bolzens 25' bedingt durch die Nockensteuerkurve wird das Greifbackenteil 35 entgegen der Schließrichtung und gegen die Beaufschlagung durch die Blattfeder 20' geöffnet. Durch eine relativ geringe Verschwenkung des Steuerteils 36 in die erste Öffnungsstellung analog dem Ausführungsbeispiel nach den Fig. 1 und 2 wird das Greifbackenteil mit seiner Anlagefläche 23' nicht selbsthemmend in der Öffnungsstellung gehalten. Fällt die Nockensteuerkurve 28 weg, so schließt das Greifbackenteil unter dem Einfluß der Blattfeder 20' wieder.If the newspaper gripper passes a cam control curve (not shown in FIGS. 3 to 6), it detects the bolt 25 'serving as cam follower and deflects the control part 36 smoothly - since work only needs to be done against the influence of the relatively weak helical compression spring 46 - until the Bolt 25 'strikes the end 43 of the slot opening 40 in the gripper jaw part 35. When the bolt 25 'is raised further due to the cam control curve, the gripping jaw part 35 is opened against the closing direction and against the action of the leaf spring 20'. Due to a relatively small pivoting of the control part 36 into the first open position analogous to the exemplary embodiment according to FIGS. 1 and 2, the gripping jaw part with its contact surface 23 'is not held in the open position in a self-locking manner. If the cam control curve 28 is omitted, the gripper jaw part closes again under the influence of the leaf spring 20 '.

Bei einer durch eine entsprechende Auslegung der Nockensteuerkurve hervorgerufenen stärkeren Auslenkung des Steuerteils 36 wird das Greifbackenteil 35 so stark verschewnkt, daß es die zweite Öffnunggstellung analog dem Ausführungsbeispiel nach den Fig. 1 und 2 erreicht und selbsthemmend unter Reibschluß mit der Blattfeder 20' gehalten ist (Fig. 4). Fällt die Nockensteuerkurve 30 weg, so verharrt das Greifbackenteil 35 in der zweiten Öffnungsstellung, wobei das Steuerteil 36 unter dem Einfluß der Schraubendruckfeder 46 wieder in die Ausgangsposition mit Kontakt zwischen seiner Unterseite 45 und dem Boden 44 zurückverschwenken kann. Zur Überführung des Greifbackenteils 35 in die Schließstellung ist eine entsprechende umgekehrt wirkende Nockensteuerkurve vorzusehen.In the event of a greater deflection of the control part 36 caused by a corresponding design of the cam control curve, the gripper jaw part 35 is pivoted so much that it reaches the second opening position analogous to the exemplary embodiment according to FIGS. 1 and 2 and is held in a self-locking manner with frictional engagement with the leaf spring 20 '( Fig. 4). If the cam control curve 30 disappears, the gripping jaw part 35 remains in the second open position, the control part 36 being able to pivot back under the influence of the helical compression spring 46 into the starting position with contact between its underside 45 and the bottom 44. In order to transfer the gripping jaw part 35 into the closed position, a corresponding cam control cam acting in reverse is to be provided.

Falls bedingt durch die Ausgestaltung der Nockensteuerkurve das Steuerteil 36 und damit das Greifbackneteil 35 über die zweite Öffnungsstellung hinweg weiter in eine dritte Öffnungsstellung verschwenkt werden (Fig. 6), deformiert die an der Oberseite des Steuerteils 36 vorgesehene Anlagefläche 50 die Blattfeder 20' so stark, daß die Anlagefläche 23' des Greifbackenteils 35 freikommt. In dieser dritten Öffnungsstellung ist das Steuerteil 36 selbsthemmend unter Reibschluß mit der Blattfeder 20' offengehalten. Das Greifbackenteil 35 ist relativ zum Steuerteil 36 um den begrenzten Schwenkwinkel zwischen diesen beiden Bauteilen in Schließrichtung S entgegen der Beaufschlagung durch die Schraubendruckfeder 46 verschwenkbar. Diese Ausführungsform ist dann von Vorteil, wenn der Zeitungsgreifer in Förderrichtung F über eine darunter liegende Schuppenlage von Zeitungen hinwegfährt und beispielsweise bei sehr dicken Zeitungen - der Greifarm 18' in Kontakt mit den Zeitungen kommt. Aufgrund seiner Verschwenkbarkeit in der dritten Öffnungsstellung kann er flexibel nachgeben und bringt die Schuppenlage dadurch nicht in Unordnung.If, due to the design of the cam control curve, the control part 36 and thus the gripper jaw part 35 are pivoted further into a third open position beyond the second open position (FIG. 6), the contact surface 50 provided on the upper side of the control part 36 deforms the leaf spring 20 'so much that the contact surface 23 'of the gripper jaw part 35 is released. In this third open position, the control part 36 is held open in a self-locking manner with frictional engagement with the leaf spring 20 '. The gripping jaw part 35 can be pivoted relative to the control part 36 by the limited pivoting angle between these two components in the closing direction S against the action of the helical compression spring 46. This embodiment is advantageous if the newspaper gripper moves in the conveying direction F over an underlying scale layer of newspapers and, for example, in the case of very thick newspapers - the gripper arm 18 'comes into contact with the newspapers. Due to its pivotability in the third open position, it can give in flexibly and does not mess up the scale.

Aus der dritten Öffnungsstellung gemäß Fig. 6 ist das Greifbackenteil 35 durch eine entsprechende Nockensteuerkurve lösbar, die das Steuerteil 36 über den Bolzen 25' erfaßt und dieses gemeinsam mit dem Greifbackenteil 35 unter dem Einfluß der Blattfeder 20' in die Schließstellung (Fig. 3) verbringt.6, the gripper jaw part 35 can be released by a corresponding cam control cam which detects the control part 36 via the pin 25 'and this together with the gripper jaw part 35 under the influence of the leaf spring 20' into the closed position (FIG. 3) spends.

Abschließend ist darauf hinzuweisen, daß durch eine abwechselnde Ausrichtung von Bolzen 25' in aufeinanderfolgenden Zeitungsgreifern 7' nach links oder rechts bezüglich der Förderrichtung F und durch eine entsprechend einseitige Anbringung von Nockensteuerkurven nur jeder zweite Zeitungsgreifer selektiv geöffnet werden kann.In conclusion, it should be pointed out that by alternating alignment of bolts 25 'in successive newspaper grippers 7' to the left or right with respect to the conveying direction F and by a correspondingly one-sided attachment of cam control curves, only every second newspaper gripper can be selectively opened.

Claims (17)

  1. Newspaper convevor comprising an endless convevor chain (1) running along a conveyor track (3) and a plurality of newspaper grippers (7, 7') arranged alongside one another thereon, each having a supporting part (8, 8') for securing the gripper (7, 7') to the endless conveyor chain (1), a stationary gripper jaw (16, 16') and a movable gripper jaw (11, 11') cooperating therewith operated by a spring (leaf spring 20, 20'), between which gripper jaws (11, 11', 16, 16') a newspaper can be clamped when the movable gripper jaw (11, 11') is closed, and in which the closing and opening movement of the movable gripper jaw (11, 11') can be controlled by means of control cams (28, 30, 32) on the conveyor track (3), characterised in that the movable gripper jaw (11) can be set in two opening positions, i.e. a first opening position in which the movable gripper jaw (11, 11') is held open against the closing force of the spring in the form of a leaf spring (20, 20') by a control cam (28) and a second opening position in which the movable gripper jaw (11, 11') is held open in a self-locking manner by friction by the leaf spring (20, 20').
  2. Newspaper conveyor according to claim 1, characterised in that the supporting part (8, 8') has a substantially U-shaped cross section, its base (9, 9') being secured to the endless conveyor chain (1) and the movable gripper jaw (11, 11') being mounted to pivot about a pivot axis (13, 13') extending transversely to the conveying direction (F) between the side walls (10, 10') thereof.
  3. Newspaper conveyor according to claim 2, characterised in that the leaf spring (20, 20') arranged in the supporting part (8, 8') between its base (9, 9') and a bearing part (17, 17') of the movable gripper jaw (11, 11') is bent into a U-shape and is supported via a first leg (21, 21') on the base (9, 9') of the supporting part (8, 8') and via a second leg (22, 22') at least on the bearing part (17, 17') of the movable gripper jaw (11, 11').
  4. Newspaper conveyor according to claim 3, characterised in that the bearing part (17, 17') of the movable gripper jaw (11, 11') is provided with a bearing surface (23, 23') for the second leg (22, 22') of the leaf spring (20, 20') curved convexly about a bend axis parallel to the pivot axis (13, 13').
  5. Newspaper conveyor according to claim 4, characterised in that the curvature of the bearing surface (23, 23') relative to the pivot axis (13, 13') is designed in such a manner that the second leg (22, 22') of the leaf spring (20, 20') springs in increasingly in the direction of the first leg (21, 21') as the opening angle of the movable gripper jaw (16, 16') increases.
  6. Newspaper conveyor according to one of claims 1 to 5, characterised in that the second leg (22, 22') of the leaf spring (20, 20') is provided at its end with a stop bar (24, 24') directed towards the first leg (21, 21').
  7. Newspaper conveyor according to one of claims 1 to 6, characterised in that the opening angle (W1) of the movable gripper jaw (11, 11') in the first opening position is smaller than its opening angle (W2) in the second opening position.
  8. Newspaper conveyor according to claims 6 and 7, characterised in that the second leg (22, 22') of the leaf spring (20, 20') is elastically deformable when the movable gripper jaw (11, 11') passes from the first opening position into the second opening position, with the stop bar (24, 24') coming to bear against the first leg (21, 21') in order to increase the friction between the bearing surface (23, 23') and the second leg (22, 22').
  9. Newspaper conveyor according to claim 8, characterised in that the bearing region of the bearing surface (23, 23') of the movable gripper jaw (11, 11') on the second leg (22, 22') of the leaf spring (20, 20') is displaced in the direction of the base (34, 34') of the leaf spring (20, 20') when the gripper jaw (11, 11') moves into the second opening position.
  10. Newspaper conveyor according to one of claims 2 to 9, characterised in that the movable gripper jaw (11, 11') is provided with a cam follower (bolt 25, 25', roller 27) for the control cam (28, 30, 32) projecting out transversely to the conveying direction (F) and passing through a curved oblong opening (26, 26') in at least one of the side walls (10, 10') of the supporting part (8, 8').
  11. Newspaper conveyor according to one of claims 1 to 10, characterised in that the movable gripper jaw (11') is made in two parts and has a gripper jaw part (35) and a control part (36) which is mounted on the gripper jaw part (35) to pivot relative to the latter about a limited pivot angle in the opening or closing direction of the gripper jaw part (35), is operated by a spring (helical compression spring 46) in the closing direction (S) of the gripper jaw part (35) and is engaged by a control cam in order to move the gripper jaw part (35) into the opening positions.
  12. Newspaper conveyor according to claim 11, characterised in that the control part (36) and the gripper jaw part (35) are mounted on the supporting part (8') to pivot about a common pivot axis (13').
  13. Newspaper conveyor according to claim 11 or claim 12, characterised in that the movable gripper jaw (11') can be moved by means of a control cam into a third opening position in which the control part (36) is held open in a self-locking manner by friction by the leaf spring (20') and in which the gripper jaw part (35) can pivot relative to the control part (36) about the limited relative pivot angle in the closing direction (S).
  14. Newspaper conveyor according to one of claims 11 to 13, characterised in that the bearing part (17') of the gripper jaw part (35') is provided with a central recess (38) extending in its pivot plane (SE) and open at least in the direction of the leaf spring (20'), in which the control part (36) in the form of a block is arranged.
  15. Newspaper conveyor according to claim 14, characterised in that the control part (36) is provided with a cam follower (bolt 25') which projects out transversely to the conveying direction (F) and passes through one of the side walls (41, 42) of the gripper jaw part (35) delimiting the recess (38) and the side walls (10') of the supporting part (8') via respective curved oblong holes (oblong openings 40, 26').
  16. Newspaper conveyor according to claim 14 or claim 15, characterised in that, for spring operation of the control part (36) relative to the gripper jaw part (35), a helical compression spring (46) is inserted into two blind bores (47, 48) arranged on the underside (45) of the control part (36) and in the bottom (44) of the recess (38) in the gripper jaw part (35) with orifices arranged close together.
  17. Newspaper conveyor according to claim 10 or claim 15, characterised in that the cam follower (bolt 25, 25', roller 27) is releasably secured to the movable gripper jaw (11, 11') or to the control part (36) and can be mounted to project out optionally towards the left or the right transversely to the conveying direction (F).
EP94919640A 1993-06-17 1994-06-17 Newspaper conveyor Expired - Lifetime EP0655982B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4320085A DE4320085A1 (en) 1992-11-04 1993-06-17 Conveyor for newspapers, with continuous chain running along track - has pick=up pieces on each support part, fixed pick=up jaws, plate spring and control cam
DE4320085 1993-06-17
PCT/EP1994/001983 WO1995000429A1 (en) 1993-06-17 1994-06-17 Newspaper conveyor

Publications (2)

Publication Number Publication Date
EP0655982A1 EP0655982A1 (en) 1995-06-07
EP0655982B1 true EP0655982B1 (en) 1997-01-22

Family

ID=6490547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94919640A Expired - Lifetime EP0655982B1 (en) 1993-06-17 1994-06-17 Newspaper conveyor

Country Status (5)

Country Link
US (1) US5575379A (en)
EP (1) EP0655982B1 (en)
JP (1) JPH08500318A (en)
CN (1) CN1112784A (en)
WO (1) WO1995000429A1 (en)

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EP0806392B1 (en) * 1996-05-09 2002-08-07 Grapha-Holding Ag Method for gathering printed products into assembled printed products
DE19642117A1 (en) 1996-10-12 1998-04-16 Koenig & Bauer Albert Ag Clamping pliers for endless conveyors
IT243371Y1 (en) * 1997-08-26 2002-03-04 Alessandro Garioni DEVICE FOR THE ATTACHMENT OF THE PIECES IN PARTICULAR OF CIRCUITS PRINTED ON TRANSPORT LINES PRESENT IN TUNNEL OVENS OR SIMILAR.
US6227589B1 (en) * 1999-12-01 2001-05-08 Philadelphia Newspapers, Inc. Gripper assembly for a conveying device for conveying single-sheet or multi-sheet printed products and a method for modifying the same
WO2006002098A2 (en) * 2004-06-18 2006-01-05 Roye Weeks Sheet handling apparatus
BRPI0710190A2 (en) * 2006-04-12 2011-08-09 Ferag Ag clamping device for catching and transporting flat objects
EP1867600B1 (en) * 2006-06-14 2009-03-25 Sidel Holdings & Technology S.A. Gripper for containers
EP2155593B1 (en) * 2007-05-29 2015-01-28 Ferag AG Method for monitoring and/or controlling a transport device, and transport device for carrying out said method
CH699689A1 (en) * 2008-10-02 2010-04-15 Ferag Ag Terminal element for putting on a terminal of a tongue and claw claw with such a terminal element.
IT1399982B1 (en) * 2010-04-30 2013-05-09 Arol Spa SOCKET DEVICE FOR AUTOMATIC CAPPING MACHINES
DE102011116883A1 (en) * 2011-04-21 2012-10-25 Khs Corpoplast Gmbh Workpiece supporting device for blowing station of container, has tongs that are provided in radial direction of wheel and aligned with centerline of base such that recess of tongs are spanned within range limited in radial direction
FR3004982B1 (en) * 2013-04-24 2015-05-01 Serac Group DEVICE FOR HOLDING A CONTAINER COMPRISING A SPRING BLADE AND CONTAINER TREATING PLANT INCLUDING SUCH A DEVICE
FR3023273B1 (en) * 2014-07-02 2016-08-12 Serac Group CONTAINER TRANSPORTATION FACILITY
DE202015106982U1 (en) * 2015-12-22 2017-03-23 SSI Schäfer PEEM GmbH Chain link for a multi-unit conveyor chain of a suspension conveyor
CN110510383A (en) * 2019-08-15 2019-11-29 苏州英迈吉智能科技有限公司 A kind of logistics delivery steering system
KR102386058B1 (en) * 2021-11-25 2022-04-14 주식회사 에스티영원 Clip opening and closing apparatus for film stretching

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US2530412A (en) * 1947-12-09 1950-11-21 American Can Co Conveyer with toggle locking feed dog
SU886080A1 (en) * 1978-04-06 1981-11-30 За нит гль ОПИСАНИЕ ИЗОБРЕТЕНИЯ К АВТОРСКОМУ СВИДЕТЕЛЬСТВУ 61) Дополнительное к авт. свид-ву - Device for transporting flat capacitor blanks
CH644816A5 (en) * 1980-02-08 1984-08-31 Ferag Ag CONVEYING DEVICE, PARTICULAR FOR PRINTED PRODUCTS, WITH GRIPPERS ANCHORED ON A CIRCULAR ZUGORGAN.
CH670619A5 (en) * 1986-04-29 1989-06-30 Sft Ag Spontanfoerdertechnik
DE59006518D1 (en) * 1989-11-08 1994-08-25 Grapha Holding Ag CLAMPING PLIERS FOR CHAIN TRANSPORTERS.
EP0557680B1 (en) * 1992-02-19 1996-05-22 Ferag AG Conveyor gripper for conveying printed products of one or more sheets
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DK0600183T3 (en) * 1992-12-02 1997-10-27 Ferag Ag Grabs for a feeder for feeding One or Multiple Leaf printing products

Also Published As

Publication number Publication date
EP0655982A1 (en) 1995-06-07
US5575379A (en) 1996-11-19
CN1112784A (en) 1995-11-29
JPH08500318A (en) 1996-01-16
WO1995000429A1 (en) 1995-01-05

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