EP0770476A2 - Apparatus for spreading open tubular blanks for making bottoms in bags - Google Patents

Apparatus for spreading open tubular blanks for making bottoms in bags Download PDF

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Publication number
EP0770476A2
EP0770476A2 EP96113141A EP96113141A EP0770476A2 EP 0770476 A2 EP0770476 A2 EP 0770476A2 EP 96113141 A EP96113141 A EP 96113141A EP 96113141 A EP96113141 A EP 96113141A EP 0770476 A2 EP0770476 A2 EP 0770476A2
Authority
EP
European Patent Office
Prior art keywords
suction cups
parallel
shaft
hose
suction
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
EP96113141A
Other languages
German (de)
French (fr)
Other versions
EP0770476B1 (en
EP0770476A3 (en
Inventor
Rüdiger Duwendag
Joachim Witzke
Fritz Achelpohl
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 DE1995140150 external-priority patent/DE19540150B4/en
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0770476A2 publication Critical patent/EP0770476A2/en
Publication of EP0770476A3 publication Critical patent/EP0770476A3/en
Application granted granted Critical
Publication of EP0770476B1 publication Critical patent/EP0770476B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/003—Opening or distending bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0014—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents

Definitions

  • the invention relates to a device for pulling continuously cross-conveyed hose sections for the purpose of forming bottoms in sack production with paired support tubes, each of which forms the coupling of two parallel links rotatably mounted in a machine frame and is provided with a number of radial suction cups, and with one with a shaft of a parallel link connected crank, a sliding block or a roller-bearing crank pin slides in a radial guide attached to a shaft, the shaft of the guide being mounted offset to the parallel link shaft so that the elevator movement of the suction row corresponds essentially to the conveying speed translational movement is superimposed.
  • Pieces of hose 1 made of single-ply or multi-ply paper are conveyed in the direction of arrow 2 in the conveying plane 3 transversely in such a way that the ends of the piece of tubing provided with straight cut edges protrude beyond leading or limiting edges.
  • Attacking rows of suction cups 4, of which only one row is shown the ends of the hose sections formed by the cut edges are drawn up and sickles spreading out through the folded edges 5 of the corner inserts 6 then stabilize the folding of the so-called base square, so that in subsequent stations if necessary, after inserting bottom cover sheets, the bottoms can be added by overlapping the side folds.
  • the suction cups 4 of both rows are directed towards one another and are attached radially to support tubes 7, which are articulated as a coupling to the two parallel bars 8, 9, which are rotatably mounted in a machine frame (not shown) about pivot shafts 10, 11.
  • a crank 12 is rotatably mounted, which carries a roller 13 at its free end.
  • the roller 13 is guided in a radial guide 14 of a disk 15, which is fixed to the outside of a shaft 16 mounted in the machine frame.
  • the shaft 16 is provided with a drive which drives the disk 15 in the direction of arrow A.
  • the distance between the axes of the shafts 10 and 16 is selected and the rotational speed of the disk 15 is matched to the conveying speed of the hose sections 1 in such a way that the suction rows 4 in the position shown in FIG. 4 act on both sides of the edge regions of the hose section and a translational one Carry out movement in the direction of the bag running, which essentially corresponds to the conveying speed of the hose sections.
  • the translatory movement of the suction cups is superimposed by a transverse movement due to the movement characteristics of the coupling 7, so that the end regions of the hose sections to be pulled open in the manner shown in FIG. 5 and the sickles (not shown) for spreading out the corner folds 6 in the opened hose sections can drive in.
  • the suction cups 4 While opening the hose section ends, the suction cups 4 are supplied with suction air via the support tubes 7 through lines (not shown) in a controlled manner such that the suction cups 4 suck in the bag walls in the position shown in FIG. 4 and the suction air supply is interrupted after the desired opening, so that the suction cups 4 release the drawn end areas as free of distortion as possible.
  • crank control therefore gives the four-link parallel link coupling system such a rotation that the best possible synchronization is ensured during the winding phase and a corresponding overtaking movement takes place during the remaining part of the rotation of the parallel links 8, 9.
  • the object of the invention is therefore to provide a device of the type specified at the outset which enables an improved fitting of the hose section ends even at a higher conveying speed.
  • this object is achieved in a device of the generic type in that the radial guide is curved in such a way that the phase of the synchronism of the suction cups with the hose section is extended.
  • the engagement time of the suction cups on the sack edges to be opened can be extended with improved synchronism, so that a better and in particular wider opening is achieved and a trouble-free entry and engagement of the sickles streaking the corner turns is ensured.
  • a pivot shaft of a parallel link is driven by a servo motor instead of by a crank guide cam drive, which is controlled in such a way that the phase of the synchronism of the suction cups with the hose section is extended.
  • Controllable servomotors are known in different embodiments, so that a correspondingly non-uniform drive only has to be issued in accordance with the conveying speed of the hose sections of the shaft of a parallel link.
  • a particular problem during the pulling up of the end regions of the hose sections provided with the cut edges is that the edge strips to be pulled up are moved out of the conveying plane at an angle, the plane of the suction plates maintaining their plane and not participating in the pivoting movement, so that they become apparent with increasing pulling remove the level of the raised edge strips at an angle and there is an undesirable bending of the edge strips.
  • Another object of the invention is therefore to enable the edge strips of the tube pieces to be pulled open without bending.
  • each support tube is rotatably mounted in holding pieces which can be pivoted to the parallel core are mounted, and that on the support tube a radial lever is rotatably mounted, which runs over a sliding block or a roller on a curve connected to the associated parallel link, which gives the support tube such a pivoting movement that the plane of the suction cups of each row when winding remains essentially parallel to the plane of the drawn-up edge strips of the tube pieces.
  • the edge of the drawn-up edge strip is not bent out of the plane corresponding to the angle of the elevator by the suction devices.
  • the edge strips can be drawn up by the device according to the invention until the floor square is formed.
  • FIGS. 1 and 2 essentially corresponds to the elevator device described with reference to FIGS. 4 and 5, so that reference is made to the above description.
  • rows of suction cups 4 are arranged radially on both sides of the horizontal conveying plane 3, of which only the lower side with the associated drive is shown in FIGS. 1 and 2.
  • the elevator device shown in FIGS. 1 and 2 differs from that according to FIGS. 4 and 5 essentially only in that the roller 13, which is rotatably mounted on the crank pin on the free end of the crank 12, is guided in a guide 18 of the disk 15 is curved in such a way that the phase of synchronism of the suction cups 4 with the hose section 1 is extended and thus the engagement time is also extended.
  • the shaft 10 of the link 8, which is mounted in the machine frame, is driven by a servo motor 19 instead of by a crank guide curve drive is driven, which is controlled by a control device, not shown, in such a way that the handlebar 8 is given such a rotation that the synchronization phase and thus also the engagement time of the suction cups on the edge strips of the hose pieces to be wound up is extended.
  • edge strips of the hose pieces are angled around their fold lines, which are defined by the outer fold edges, and thereby tilt towards the flat middle part of the hose piece, while the plane of the suction cups is parallel to the middle plane the tube pieces remain.
  • a handlebar 20 of the parallel link support tube system has a shaft 21 which can be freely rotated and on which a holding piece 22 is non-rotatably mounted.
  • the support tube 7 is freely rotatably supported above the shaft 21 and its axis crossing at right angles.
  • the support tube 7 is in turn connected in a manner not shown by a line to a source of suction air.
  • An angle lever 23 is placed on the support tube 7, one arm 24 of which carries a freely rotatable roller 25. This roller runs on a cam 26 enclosing the shaft 21, which is connected to the parallel link 20.
  • the other lever arm 28 of the angle lever 23 is connected by a tension spring 29 to the support piece 22, so that the roller 25 in contact with the tread Curve guide 26 is held.
  • the control curve of the curve guide 26 is designed so that when the parallel link is pivoted via the roller 25 and the lever arm 24, the support tube 7 is given such a pivoting movement that the suction cups during their engagement time on the edge strips of the tube pieces and their elevator movement with their levels Suction plates remain parallel to the angularly folded edge strips of the hose pieces.
  • the other parallel link is correspondingly provided with a pivotable holding piece in which the support tube 7 is rotatably mounted.
  • the other parallel link is not provided with a lever with a roller that pivots the support tube 7.

Landscapes

  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Manipulator (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

Hose pieces (1) made of single or multilayer paper are conveyed in a crossways plane (3) so that their ends to be drawn up and having straight cut edges extend over guide or limiting edges. Rows of suckers (4) engage on the walls of the hose section. The ends of the hose sections formed by the cut edges are drawn upwards and the folding of the drawn-up base square is stabilised. The suckers of both rows are directed towards each other and are fixed radially on support tubes (7), which are articulately connected to two parallel links (8,9) rotatable around pivot shafts (10,11) in the machine frame. A crank (12) is fixed on the shaft of the first parallel link, which at its free end carries a roller (13).

Description

Die Erfindung betrifft eine Vorrichtung zum Aufziehen kontinuierlich quergeförderter Schlauchabschnitte zum Zweck der Anformung von Böden bei der Sackherstellung mit paarweise vorgesehenen Tragrohren, von denen jedes die Koppel zweier in einem Maschinengestell drehbar gelagerter Parallellenker bildet und mit einer Reihe von radialen Saugern versehen ist, und mit einer mit einer Welle eines Parallellenkers verbundenen Kurbel, deren einen Gleitstein oder eine Rolle tragender Kurbelzapfen in einer auf einer Welle befestigten radialen Führung gleitet, wobei die Welle der Führung derart versetzt zu der Parallellenkerwelle gelagert ist, daß der Aufzugsbewegung der Saugerreihe eine im wesentlichen der Fördergeschwindigkeit entsprechende translatorische Bewegung überlagert ist.The invention relates to a device for pulling continuously cross-conveyed hose sections for the purpose of forming bottoms in sack production with paired support tubes, each of which forms the coupling of two parallel links rotatably mounted in a machine frame and is provided with a number of radial suction cups, and with one with a shaft of a parallel link connected crank, a sliding block or a roller-bearing crank pin slides in a radial guide attached to a shaft, the shaft of the guide being mounted offset to the parallel link shaft so that the elevator movement of the suction row corresponds essentially to the conveying speed translational movement is superimposed.

Eine aus der Praxis bekannte Vorrichtung dieser Art wird anhand der Fig. 4 und 5 der Zeichnung beschrieben.A device of this type known from practice is described with reference to FIGS. 4 and 5 of the drawing.

Schlauchstücke 1 aus einlagigem oder mehrlagigem Papier werden in Richtung des Pfeils 2 in der Förderebene 3 querliegend in der Weise gefördert, daß die aufzuziehenden mit geraden Schnittkanten versehenen Enden des Schlauchstücks Führungs- oder Begrenzungskanten überragen. Von beidseits an den Schlauchabschnittwandungen angreifenden Reihen von Saugern 4, von denen nur eine Reihe dargestellt ist, werden die durch die Schnittkanten gebildeten Enden der Schlauchabschnitte aufgezogen und durch die Faltkanten 5 der Eckeinschläge 6 ausstreichende Sicheln wird dann die Faltung des aufgezogenen sog. Bodenquadrats stabilisiert, so daß in nachfolgenden Stationen gegebenenfalls nach dem Einlegen von Bodendeckblättern die Böden durch einander überlappendes Einschlagen der Seiteneinschläge zugelegt werden können.Pieces of hose 1 made of single-ply or multi-ply paper are conveyed in the direction of arrow 2 in the conveying plane 3 transversely in such a way that the ends of the piece of tubing provided with straight cut edges protrude beyond leading or limiting edges. From both sides of the hose section walls Attacking rows of suction cups 4, of which only one row is shown, the ends of the hose sections formed by the cut edges are drawn up and sickles spreading out through the folded edges 5 of the corner inserts 6 then stabilize the folding of the so-called base square, so that in subsequent stations if necessary, after inserting bottom cover sheets, the bottoms can be added by overlapping the side folds.

Die Sauger 4 beider Reihen sind gegeneinander gerichtet und radial an Tragrohren 7 befestigt, die als Koppeln gelenkig mit den beiden Parallellenkern 8, 9 verbunden sind, die in nicht dargestellter Weise um Schwenkwellen 10, 11 drehbar im nicht dargestellten Maschinengestell gelagert sind. Auf die Welle 10 der Koppel 8 ist undrehbar eine Kurbel 12 aufgesetzt, die an ihrem freien Ende eine Rolle 13 trägt. Die Rolle 13 ist in einer radialen Führung 14 einer Scheibe 15 geführt, die drenfest mit einer im Maschinengestell gelagerten Welle 16 verbunden ist. Die Welle 16 ist mit einem Antrieb versehen, die die Scheibe 15 in Richtung des Pfeils A antreibt. Der Abstand der Achsen der Wellen 10 und 16 ist so gewählt und die Drehgeschwindigkeit der Scheibe 15 ist derart auf die Fördergeschwindigkeit der Schlauchabschnitte 1 abgestimmt, daß die Saugerreihen 4 in der aus Fig. 4 ersichtlichen Stellung beidseits an den Randbereichen des Schlauchabschnitts angreifen und eine translatorische Bewegung in Sacklaufrichtung ausführen, die im wesentlichen der Fördergeschwindigkeit der Schlauchabschnitte entspricht. Während eines kurzen Förderweges wird der translatorischen Bewegung der Sauger aufgrund der Bewegungscharakteristik der Koppel 7 eine Querbewegung überlagert, so daß die aufzuziehenden Endbereiche der Schlauchabschnitte in der aus Fig. 5 ersichtlichen Weise aufgezogen und die nicht dargestellten Sicheln zum Ausstreichen der Eckeinschläge 6 in die geöffneten Schlauchabschnitte einfahren können.The suction cups 4 of both rows are directed towards one another and are attached radially to support tubes 7, which are articulated as a coupling to the two parallel bars 8, 9, which are rotatably mounted in a machine frame (not shown) about pivot shafts 10, 11. On the shaft 10 of the coupling 8, a crank 12 is rotatably mounted, which carries a roller 13 at its free end. The roller 13 is guided in a radial guide 14 of a disk 15, which is fixed to the outside of a shaft 16 mounted in the machine frame. The shaft 16 is provided with a drive which drives the disk 15 in the direction of arrow A. The distance between the axes of the shafts 10 and 16 is selected and the rotational speed of the disk 15 is matched to the conveying speed of the hose sections 1 in such a way that the suction rows 4 in the position shown in FIG. 4 act on both sides of the edge regions of the hose section and a translational one Carry out movement in the direction of the bag running, which essentially corresponds to the conveying speed of the hose sections. During a short conveying path, the translatory movement of the suction cups is superimposed by a transverse movement due to the movement characteristics of the coupling 7, so that the end regions of the hose sections to be pulled open in the manner shown in FIG. 5 and the sickles (not shown) for spreading out the corner folds 6 in the opened hose sections can drive in.

Während des Öffnens der Schlauchabschnittenden wird den Saugern 4 über die Tragrohre 7 durch nicht dargestellte Leitungen Saugluft in gesteuerter Weise derart zugeführt, daß die Sauger 4 in der aus Fig. 4 ersichtlichen Stellung die Sackwandungen ansaugen und nach der gewünschten Öffnung die Saugluftzuführung unterbrochen wird, so daß die Sauger 4 die aufgezogenen Endbereiche möglichst verzerrungsfrei freigeben.While opening the hose section ends, the suction cups 4 are supplied with suction air via the support tubes 7 through lines (not shown) in a controlled manner such that the suction cups 4 suck in the bag walls in the position shown in FIG. 4 and the suction air supply is interrupted after the desired opening, so that the suction cups 4 release the drawn end areas as free of distortion as possible.

Durch die Kurbelsteuerung wird daher dem Viergelenk-Parallellenker-Koppel-System eine derartige Drehung erteilt, daß während der Aufzugsphase ein möglichster Gleichlauf gewährleistet ist und während des restlichen Teils der Drehung der Parallellenker 8, 9 eine entsprechende Überhol-Bewegung stattfindet.The crank control therefore gives the four-link parallel link coupling system such a rotation that the best possible synchronization is ensured during the winding phase and a corresponding overtaking movement takes place during the remaining part of the rotation of the parallel links 8, 9.

Aufgrund der Bewegungscharakteristik des Führungskurven-Kurbel-Triebes läßt sich jedoch während der Aufzugsphase nur ein angenäherter Gleichlauf der Sauger 4 mit dem Schlauchstück 1 erreichen, so daß eine verzerrungsfreie Öffnung nicht gewährleistet ist. Dies kann bei geringeren Fördergeschwindigkeiten in Kauf genommen werden, führt aber bei höheren Fördergeschwindigkeiten der Schlauchabschnitte bei erhöhter Maschinenleistung zu Problemen, so daß es zu Störungen und Einrissen bei dem Einfahren der die Eckeinschläge ausstreichenden Sicheln kommen kann.Due to the movement characteristics of the guide cam crank drive, however, only an approximate synchronism of the suction cups 4 with the tube piece 1 can be achieved during the elevator phase, so that a distortion-free opening is not guaranteed. This can be accepted at lower conveying speeds, but leads to problems at higher conveying speeds of the hose sections with increased machine output, so that there may be faults and tears when retracting the sickles stroking the corner folds.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, die ein verbessertes Aufziehen der Schlauchabschnittenden auch bei höherer Fördergeschwindigkeit ermöglicht.The object of the invention is therefore to provide a device of the type specified at the outset which enables an improved fitting of the hose section ends even at a higher conveying speed.

Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung der gattungsgemäßen Art dadurch gelöst, daß die radiale Führung in der Weise kurvenförmig ausgebildet ist, daß die Phase des Gleichlaufs der Sauger mit dem Schlauchabschnitt verlängert ist. Durch eine entsprechende kurvenförmige Ausbildung der radialen Führung läßt sich bei verbessertem Gleichlauf die Eingriffszeit der Sauger an den aufzuziehenden Sackrändern verlängern, so daß eine bessere und insbesondere weitere Öffnung erzielt wird und ein störungsfreier Einlauf und Eingriff der die Eckeinschläge ausstreichenden Sicheln gewährleistet ist.According to the invention, this object is achieved in a device of the generic type in that the radial guide is curved in such a way that the phase of the synchronism of the suction cups with the hose section is extended. By a corresponding curvilinear design of the radial guide, the engagement time of the suction cups on the sack edges to be opened can be extended with improved synchronism, so that a better and in particular wider opening is achieved and a trouble-free entry and engagement of the sickles streaking the corner turns is ensured.

Nach einer besonderen Ausführungsform der Erfindung ist vorgesehen, daß eine Schwenkwelle eines Parallellenkers statt durch einen Kurbel-Führungskurven-Antrieb von einem Servomotor angetrieben ist, der derart gesteuert ist, daß die Phase des Gleichlaufs der Sauger mit dem Schlauchabschnitt verlängert ist. Steuerbare Servomotore sind in unterschiedlichen Ausführungsformen bekannt, so daß lediglich entsprechend der Fördergeschwindigkeit der Schlauchabschnitte der Welle eines Parallellenkers ein entsprechend ungleichförmiger Antrieb erteilt werden muß.According to a special embodiment of the invention it is provided that a pivot shaft of a parallel link is driven by a servo motor instead of by a crank guide cam drive, which is controlled in such a way that the phase of the synchronism of the suction cups with the hose section is extended. Controllable servomotors are known in different embodiments, so that a correspondingly non-uniform drive only has to be issued in accordance with the conveying speed of the hose sections of the shaft of a parallel link.

Ein besonderes Problem während des Aufziehens der mit den Schnittkanten versehenen Endbereiche der Schlauchabschnitte besteht darin, daß die aufzuziehenden Randstreifen aus der Förderebene winkelig herausbewegt werden, wobei die Ebene der Saugerteller ihre Ebene beibehalten und die Schwenkbewegung nicht mitmachen, so daß sie sich mit zunehmenden Aufziehen aus der Ebene der aufgezogenen Randstreifen winkelig entfernen und es zu unerwünschten Abbiegungen der Randstreifen kommt.A particular problem during the pulling up of the end regions of the hose sections provided with the cut edges is that the edge strips to be pulled up are moved out of the conveying plane at an angle, the plane of the suction plates maintaining their plane and not participating in the pivoting movement, so that they become apparent with increasing pulling remove the level of the raised edge strips at an angle and there is an undesirable bending of the edge strips.

Eine weitere Aufgabe der Erfindung ist es daher, ein verbiegungsfreies Aufziehen der Randstreifen der Schlauchstücke zu ermöglichen.Another object of the invention is therefore to enable the edge strips of the tube pieces to be pulled open without bending.

Nach einer Weiterentwicklung, für die selbständiger Schutz beansprucht wird, ist daher vorgesehen, daß jedes Tragrohr drehbar in Haltestücken gelagert ist, die schwenkbar an den Parallellenkern gelagert sind, und daß auf das Tragrohr ein radialer Hebel drehfest aufgesetzt ist, der über einen Gleitstein oder eine Rolle auf einer mit dem zugehörigen Parallellenker fest verbundenen Kurve verläuft, die dem Tragrohr eine derartige Schwenkbewegung erteilt, daß die Ebene der Saugerteller jeder Reihe beim Aufziehen im wesentlichen parallel zu der Ebene der aufgezogenen Randstreifen der Schlauchstücke bleibt. Dadurch, daß den Saugerreihen während ihrer Aufzugsbewegung gleichzeitig durch die erfindungsgemäße Vorrichtung eine Drehbewegung überlagert wird, wird ein Aufziehen ermöglicht, bei dem durch die Sauger der Rand des aufgezogenen Randstreifens nicht aus der dem Aufzugswinkel entsprechenden Ebene herausgebogen wird. Im Idealfall lassen sich durch die erfindungsgemäße Vorrichtung die Randstreifen bis zur Ausbildung des Bodenquadrats aufziehen.According to a further development, for which independent protection is claimed, it is therefore provided that each support tube is rotatably mounted in holding pieces which can be pivoted to the parallel core are mounted, and that on the support tube a radial lever is rotatably mounted, which runs over a sliding block or a roller on a curve connected to the associated parallel link, which gives the support tube such a pivoting movement that the plane of the suction cups of each row when winding remains essentially parallel to the plane of the drawn-up edge strips of the tube pieces. Characterized in that a rotating movement is superimposed on the suction rows during their elevator movement by the device according to the invention, a mounting is made possible in which the edge of the drawn-up edge strip is not bent out of the plane corresponding to the angle of the elevator by the suction devices. Ideally, the edge strips can be drawn up by the device according to the invention until the floor square is formed.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig. 1
eine Seitenansicht der erfindungsgemäßen Aufzugsvorrichtung im Zeitpunkt des Angriffs der Sauger an den noch flach aufeinanderliegenden Randstreifen des Schlauchstücks in schematischer Darstellung,
Fig. 2
eine der Fig. 1 entsprechende Darstellung zu einem Zeitpunkt, in dem die Sauger die Randstreifen des Schlauchstücks auseinandergezogen haben,
Fig. 3
eine Seitenansicht einer zweiten Ausführungsform der erfindungsgemäßen Aufzugsvorrichtung in schematischer Darstellung,
Fig. 4 und 5
den Fig. 1 und 2 entsprechende Darstellungen einer bekannten Aufzugsvorrichtung,
Fig. 6
eine Seitenansicht des linken Lenkers des das Tragrohr mit Saugern tragenden Parallellenker-Systems und
Fig. 7
einen Schnitt durch den Parallellenker längs der Linie VII-VII in Fig. 6.
Embodiments of the invention are explained below with reference to the drawing. In this shows
Fig. 1
2 shows a side view of the elevator device according to the invention in schematic representation at the time when the suction devices attack the edge strips of the tube piece which are still lying flat on top of one another
Fig. 2
1 shows a representation corresponding to FIG. 1 at a time when the suction devices have pulled apart the edge strips of the tube piece,
Fig. 3
2 shows a side view of a second embodiment of the elevator device according to the invention in a schematic illustration,
4 and 5
1 and 2 corresponding representations of a known elevator device,
Fig. 6
a side view of the left handlebar of the support tube with suction parallel handlebar system and
Fig. 7
a section through the parallel link along the line VII-VII in Fig. 6th

Die aus den Fig. 1 und 2 ersichtliche erfindungsgemäße Aufzugsvorrichtung entspricht im wesentlichen der anhand der Fig. 4 und 5 beschriebenen Aufzugsvorrichtung, so daß auf die obige Beschreibung Bezug genommen wird.The elevator device according to the invention shown in FIGS. 1 and 2 essentially corresponds to the elevator device described with reference to FIGS. 4 and 5, so that reference is made to the above description.

Auch bei der Aufzugsvorrichtung nach den Fig. 1 und 2 sind beidseits der horizontalen Förderebene 3 an den Tragrohren radial angeordnete Reihen von Saugern 4 angeordnet, von denen in den Fig. 1 und 2 nur die untere Seite mit dem zugehörigen Antrieb dargestellt ist.1 and 2, rows of suction cups 4 are arranged radially on both sides of the horizontal conveying plane 3, of which only the lower side with the associated drive is shown in FIGS. 1 and 2.

Die aus den Fig. 1 und 2 ersichtliche Aufzugsvorrichtung unterscheidet sich von der nach den Fig. 4 und 5 im wesentlichen nur dadurch, daß die an dem freien Ende der Kurbel 12 auf dem Kurbelzapfen drehbar gelagerte Rolle 13 in einer Führung 18 der Scheibe 15 geführt ist, die derart kurvenförmig ausgebildet ist, daß die Phase des Gleichlaufs der Sauger 4 mit dem Schlauchstück 1 verlängert und damit auch die Eingriffszeit verlängert ist.The elevator device shown in FIGS. 1 and 2 differs from that according to FIGS. 4 and 5 essentially only in that the roller 13, which is rotatably mounted on the crank pin on the free end of the crank 12, is guided in a guide 18 of the disk 15 is curved in such a way that the phase of synchronism of the suction cups 4 with the hose section 1 is extended and thus the engagement time is also extended.

Bei dem Ausführungsbeispiel nach Fig. 3 ist vorgesehen, daß die im Maschinengestell gelagerte Welle 10 des Lenkers 8 statt durch einen Kurbel-Führungskurven-Antrieb durch einen Servomotor 19 angetrieben wird, der durch eine nicht dargestellte Steuereinrichtung in der Weise gesteuert wird, daß dem Lenker 8 eine solche Drehung erteilt wird, daß die Gleichlaufsphase und damit auch die Eingriffszeit der Sauger an den aufzuziehenden Randstreifen der Schlauchstücke verlängert wird.In the embodiment according to FIG. 3, it is provided that the shaft 10 of the link 8, which is mounted in the machine frame, is driven by a servo motor 19 instead of by a crank guide curve drive is driven, which is controlled by a control device, not shown, in such a way that the handlebar 8 is given such a rotation that the synchronization phase and thus also the engagement time of the suction cups on the edge strips of the hose pieces to be wound up is extended.

Ein besonderes Problem bei dem Aufziehen der Randstreifen der Schlauchstücke besteht darin, daß die Randstreifen um ihre Faltlinien, die durch die äußeren Faltkanten definiert werden, abgewinkelt werden und sich dadurch gegenüber dem flachliegenden Mittelteil des Schlauchstücks schrägstellen, während die Ebene der Saugerteller parallel zu der Mittelebene der Schlauchstücke verbleibt.A particular problem with the pulling up of the edge strips of the hose pieces is that the edge strips are angled around their fold lines, which are defined by the outer fold edges, and thereby tilt towards the flat middle part of the hose piece, while the plane of the suction cups is parallel to the middle plane the tube pieces remain.

Um während des Aufziehens der Randstreifen auch die Ebene der Saugerteller entsprechend der Ebene der aufgezogenen Randstreifen zu verschwenken, erfolgt durch die aus den Fig. 6 und 7 ersichtliche Konstruktion eine die Verschwenkung der Sauger 4 bewirkende Drehung des Tragrohres 7.In order to also pivot the plane of the suction cups corresponding to the plane of the drawn-up edge strips during the opening of the edge strips, the construction shown in FIGS. 6 and 7 causes the suction tube 4 to pivot, causing the suction tube 4 to rotate.

Um eine entsprechende gesteuerte Drehung zu erreichen, ist einem Lenker 20 des Parallellenker-Tragrohr-Systems eine Welle 21 frei drehbar gelagert, auf die ein Haltestück 22 undrehbar aufgesetzt ist. In dem Haltestück 22 ist oberhalb der Welle 21 und deren Achse rechtwinkelig kreuzend das Tragrohr 7 frei drehbar gelagert. Das Tragrohr 7 ist wiederum in nicht dargestellter Weise durch eine Leitung mit einer Saugluftquelle verbunden. Auf dem Tragrohr 7 ist ein Winkelhebel 23 aufgesetzt, dessen einer Arm 24 eine frei drehbare Laufrolle 25 trägt. Diese Laufrolle läuft auf einer die Welle 21 einfassenden Steuerkurve 26, die mit dem Parallellenker 20 verbunden ist. Der andere Hebelarm 28 des Winkelhebels 23 ist durch eine Zugfeder 29 mit dem Tragstück 22 verbunden, so daß die Laufrolle 25 in Anlage an die Lauffläche der Kurvenführung 26 gehalten wird. Die Steuerkurve der Kurvenführung 26 ist so gestaltet, daß bei einem Verschwenken der Parallellenker über die Laufrolle 25 und den Hebelarm 24 dem Tragrohr 7 eine derartige Schwenkbewegung erteilt wird, daß die Sauger während ihrer Eingriffszeit an den Randstreifen der Schlauchstücke und ihrer Aufzugsbewegung mit den Ebenen ihrer Saugteller parallel zu den winkelig umgelegten Randstreifen der Schlauchstücke verbleiben.In order to achieve a corresponding controlled rotation, a handlebar 20 of the parallel link support tube system has a shaft 21 which can be freely rotated and on which a holding piece 22 is non-rotatably mounted. In the holding piece 22, the support tube 7 is freely rotatably supported above the shaft 21 and its axis crossing at right angles. The support tube 7 is in turn connected in a manner not shown by a line to a source of suction air. An angle lever 23 is placed on the support tube 7, one arm 24 of which carries a freely rotatable roller 25. This roller runs on a cam 26 enclosing the shaft 21, which is connected to the parallel link 20. The other lever arm 28 of the angle lever 23 is connected by a tension spring 29 to the support piece 22, so that the roller 25 in contact with the tread Curve guide 26 is held. The control curve of the curve guide 26 is designed so that when the parallel link is pivoted via the roller 25 and the lever arm 24, the support tube 7 is given such a pivoting movement that the suction cups during their engagement time on the edge strips of the tube pieces and their elevator movement with their levels Suction plates remain parallel to the angularly folded edge strips of the hose pieces.

Der andere Parallellenker ist in entsprechender Weise mit einem schwenkbaren Haltestück versehen, in dem das Tragrohr 7 drehbar gelagert ist. Der andere Parallellenker ist jedoch nicht mit einem das Tragrohr 7 verschwenkenden Hebel mit Laufrolle versehen.The other parallel link is correspondingly provided with a pivotable holding piece in which the support tube 7 is rotatably mounted. However, the other parallel link is not provided with a lever with a roller that pivots the support tube 7.

Claims (4)

Vorrichtung zum Aufziehen kontinuierlich quergeförderter Schlauchabschnitte zum Zweck der Anformung von Böden bei der Sackherstellung mit paarweise vorgesehenen, mit Saugluftquellen durch Leitungen verbundenen Tragrohren, von denen jedes die Koppel zweier in einem Maschinengestell drehbar gelagerter Parallellenker bildet und mit einer Reihe von radialen Saugern versehen ist, und mit einer mit einer Welle eines Parallellenkers verbundenen Kurbel, deren einen Gleitstein oder eine Rolle tragender Kurbelzapfen in einer auf einer Welle befestigten radialen Führung gleitet, wobei die Welle der Führung derart versetzt zu der Parallellenkerwelle gelagert ist, daß der Aufzugsbewegung der Saugerreihe eine im wesentlichen der Fördergeschwindigkeit entsprechende translatorische Bewegung überlagert ist, dadurch gekennzeichnet, daß die radiale Führung in der Weise kurvenförmig ausgebildet ist, daß die Phase des Gleichlaufs der Sauger mit dem Schlauchabschnitt verlängert ist. Device for pulling continuously transversely conveyed hose sections for the purpose of forming floors in the manufacture of sacks with support tubes provided in pairs and connected to sources of suction air by lines, each of which forms the coupling of two parallel links rotatably mounted in a machine frame and is provided with a series of radial suction devices, and with a crank connected to a shaft of a parallel linkage, the crank pin of a sliding block or a roller which supports it slides in a radial guide fastened on a shaft, the shaft of the guide being mounted offset to the parallel linkage shaft in such a way that the elevator movement of the row of suction cups is essentially a Corresponding translational movement is superimposed on the conveying speed, characterized, that the radial guide is curved in such a way that the phase of the synchronism of the suction cups with the hose section is extended. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine Schwenkwelle eines Parallellenkers statt durch einen Kurbel-Führungskurven-Antrieb von einem Servomotor angetrieben ist, der derart gesteuert ist, daß die Phase des Gleichlaufs der Sauger mit dem Schlauchabschnitt verlängert ist.Device according to claim 1, characterized in that a swivel shaft of a parallel link is driven by a servo motor instead of by a crank guide cam drive, which is controlled in such a way that the phase of synchronism of the suction cups with the hose section is extended. Vorrichtung, insbesondere nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Tragrohre mit Einrichtungen versehen sind, die diese während der Aufzugsbewegung der Sauger so verdrehen, daß die Ebenen der Saugerteller parallel zu den Ebenen der winkelig umgelegten Randstreifen der Schlauchabschnitte bleiben.Device, in particular according to one of claims 1 or 2, characterized in that the support tubes are provided with devices which rotate them during the elevator movement of the suction cups so that the planes of the suction cups remain parallel to the planes of the angularly folded edge strips of the hose sections. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß jedes Tragrohr drehbar in Haltestücken gelagert ist, die schwenkbar an den Parallellenkern gelagert sind, und daß auf das Tragrohr ein radialer Hebel drehfest aufgesetzt ist, der über einen Gleitstein oder eine Rolle auf einer mit dem zugehörigen Parallellenker fest verbundenen Kurve läuft, die dem Tragrohr eine derartige Schwenkbewegung erteilt, daß die Ebene der Saugerteller jeder Reihe beim Aufziehen im wesentlichen parallel zu der Ebene der aufgezogenen Randstreifen der Schlauchstücke bleibt.Apparatus according to claim 3, characterized in that each support tube is rotatably mounted in holding pieces which are pivotally mounted on the parallel link, and that a radial lever is non-rotatably mounted on the support tube, which via a sliding block or a roller on one with the associated parallel link firmly connected curve runs, which gives the support tube such a pivoting movement that the plane of the suction cups of each row remains essentially parallel to the plane of the drawn-up edge strips of the tube pieces when pulled up.
EP96113141A 1995-10-27 1996-08-16 Apparatus for spreading open tubular blanks for making bottoms in bags Expired - Lifetime EP0770476B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995140150 DE19540150B4 (en) 1995-10-27 1995-10-27 Apparatus for drawing continuously transversely conveyed hose sections for the purpose of molding of floors during bag making
DE19540150 1995-10-27

Publications (3)

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EP0770476A2 true EP0770476A2 (en) 1997-05-02
EP0770476A3 EP0770476A3 (en) 1999-02-03
EP0770476B1 EP0770476B1 (en) 2002-12-11

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US (1) US5827165A (en)
EP (1) EP0770476B1 (en)
JP (1) JP3699218B2 (en)
KR (1) KR100208894B1 (en)
CN (1) CN1071627C (en)
AT (1) ATE229432T1 (en)
BR (1) BR9605263A (en)
CZ (1) CZ292575B6 (en)
DE (1) DE19549618C2 (en)
ES (1) ES2188699T3 (en)
IN (1) IN191462B (en)
TW (1) TW391924B (en)

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DE102008017442B4 (en) * 2008-04-03 2013-01-17 Windmöller & Hölscher Kg Apparatus and method for making sacks comprising stretched plastic tape fabrics
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CN104924667B (en) * 2015-07-14 2017-06-23 王根乐 The feeding device of Bag Making Machine
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CN109158514B (en) * 2018-10-09 2023-09-29 漳浦金盛智能科技有限公司 Stainless steel fishing net drawing machine
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Also Published As

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ES2188699T3 (en) 2003-07-01
EP0770476B1 (en) 2002-12-11
CN1154907A (en) 1997-07-23
CZ247396A3 (en) 1997-05-14
TW391924B (en) 2000-06-01
CZ292575B6 (en) 2003-10-15
BR9605263A (en) 1998-07-21
KR100208894B1 (en) 1999-07-15
JPH09202311A (en) 1997-08-05
EP0770476A3 (en) 1999-02-03
CN1071627C (en) 2001-09-26
IN191462B (en) 2003-12-06
ATE229432T1 (en) 2002-12-15
DE19549618C2 (en) 2001-09-06
US5827165A (en) 1998-10-27
JP3699218B2 (en) 2005-09-28

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