EP1578596B1 - Bottom positioning device for cross bottom bags - Google Patents

Bottom positioning device for cross bottom bags Download PDF

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Publication number
EP1578596B1
EP1578596B1 EP03795873A EP03795873A EP1578596B1 EP 1578596 B1 EP1578596 B1 EP 1578596B1 EP 03795873 A EP03795873 A EP 03795873A EP 03795873 A EP03795873 A EP 03795873A EP 1578596 B1 EP1578596 B1 EP 1578596B1
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EP
European Patent Office
Prior art keywords
tool
roller
processing
drive
flexible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP03795873A
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German (de)
French (fr)
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EP1578596A1 (en
Inventor
Rüdiger Duwendag
Andreas Sonntag
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP1578596A1 publication Critical patent/EP1578596A1/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
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/04—Feeding sheets or blanks
    • 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
    • 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
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures

Definitions

  • the invention relates to a Bodenlegevorraum for accomplishracsoothe as shown in the preamble of claim 1.
  • transport belts which have at least components of extremely tensile material such as steel is recommended.
  • these components of the belt are covered with a much more elastic softer material, which protects the transported objects.
  • so-called Jardincortriemen be mentioned, which include in their core, which are usually coated with rubber.
  • the object of the present invention is to propose a device according to the preamble of claim 1 and a method according to the preamble of claim 4, which limits the caused by the manufacturing tolerances of the conveyor belt quality defects of the bags.
  • the present invention takes advantage of a number of surprising findings.
  • the transport process of the bags is first determined by the tensile material.
  • the angular velocity of the transport discs and the distance of the tensile material from the axis of the transport discs prevail.
  • the latter size hereinafter referred to as the effective disk radius
  • the thickness of this layer is subject to fluctuations, which are transmitted to the effective radius of the transport discs and thus to the transport speed.
  • a configuration in which the ratio of the angular velocity of the drive disks to the angular speed of the machining rollers is 2/3 is particularly preferred.
  • the ratio of the angular velocity of 2/3 the flutter of the conveyor belt also decreases by a factor of 2/3 as compared with the case that the drive pulleys have the same angular velocity as the processing rollers.
  • a drive system which, with the aid of a bevel gear, branches off torque for at least one drive disk from a vertical shaft and transmits it to the drive disk via a reduction planetary gear.
  • Fig. 1 shows a section of a Bodenlegevorraum invention.
  • the tube pieces 1 are transported lying flat in the conveying direction x.
  • the bottom 2 of the hose pieces 1 has already been formed.
  • the formation of a sack bottom is described, for example, in another unpublished patent application of the same Applicant with the reference number DE 102 55 483.
  • the piece of tubing 1 is clamped between the conveyor belt 3.
  • the Bodenrillstation 30 and the glue station 31 are described below.
  • the tools designed as creasing knives which are mounted on the circumference of the creasing rollers 7 of Bodenrillstation 30, provided the bottoms 2 of the hose piece 1 with a Bodenrillung, the counter-pressure rollers 8 provide the counterforce.
  • the transport belt 3 is formed as an endless belt and wraps at both ends of the ground-laying deflecting rollers.
  • the drive of the conveyor belt 3 is effected by the drive pulleys 4. These are driven by the king shaft 12 and driven by the transmission 5 described in detail with reference to FIG. 5.
  • each drive pulley 4 is arranged on the right and left each a deflection plate 6, as shown in FIG. 2 can be seen.
  • These deflecting disks 6 are rotatably supported by their bearing journals 11 in the machine frame.
  • the speed of the conveyor belt 3 and thus the transport speed of the hose pieces 1 results from the distance traveled per unit of time. However, the distance traveled depends on the distance from the steel wire 13 of the conveyor belt 3 to the axis of the drive pulley 4 occupies. This distance is referred to below as the effective radius R eff .
  • the effective radius R eff is the sum of the radius of the drive pulley 5 and the thickness D of the rubber sheath 15 between the steel strand 13 and the surface 17 of the conveyor belt 3.
  • the surface 17 is in direct contact with the outer periphery of the drive pulley 5.
  • the thickness D does not have a constant value but varies between the values D min and D max .
  • the distance D is subject to an error ⁇ D resulting from the difference of D max and D min .
  • This error which results from the manufacturing tolerances of the conveyor belt, causes immediate synchronization fluctuations of the conveyor belt 3 and thus losses in the production quality of the cross-bottom bags.
  • Fig. 4 shows the structure of the conveyor belt 3 in a perspective view.
  • the transport belt 3 consists essentially of a plurality of steel strands 13 arranged in a horizontal plane and a rubber jacket 15 surrounding the steel strands 13. Since the steel strands 13 have a substantially higher tensile strength compared to the rubber jacket 15, the steel strands 13 constitute the so-called "neutral phase of the transport belt 3. This means that the steel strands 13 can neither be compressed nor stretched. Conveyor belts 3 having such a structure are referred to in the art as “cable coring belts" and can be kept narrow due to their tensile strength.
  • FIG. 5 shows a view of the transmission according to FIG. 1.
  • the drive torque is supplied to the transmission via the king shaft 12.
  • the shaft passes through a bevel gear 20, which decreases a portion of the torque and distributed to the planetary gear 21 and the shaft 23.
  • the shaft 23 ends in a further bevel gear 20, which deflects the torque and delivers to another planetary gear 21.
  • Both planetary gears 21 each drive a drive pulley 4. All gear parts 20, 21, 23 are connected to the support plates 18 or the support plates 19, 22, wherein the support plates 19, 22 are also fixedly connected to the support plates 18.
  • the support plates 18 are attached to the machine frame in a manner not shown in detail.

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  • Making Paper Articles (AREA)
  • Bridges Or Land Bridges (AREA)
  • Artificial Filaments (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Abstract

A bag-making device for cross base bags limits the number of quality defects resulting from the fabrication tolerances of the conveyor belt. The device has working stations that perform working steps on bag tube sections during the bag making operation. At least one working station is equipped with a tool that is mounted on a tool roller and that runs through its working position during each rotation of the roller. The bag-making device has a conveyor system that conveys the tube sections through the working stations with conveyor belts, and a drive system that drives conveyor drive wheels and the tool rollers such that the drive wheels are driven with lesser angular speed than the tool rollers.

Description

Die Erfindung betrifft eine Bodenlegevorrichtung für Kreuzbodensäcke wie es im Oberbegriff des Anspruch 1 dargestellt ist.The invention relates to a Bodenlegevorrichtung for Kreuzbodensäcke as shown in the preamble of claim 1.

Diese Vorrichtungen sind seit langem bekannt und sie werden in beispielsweise in der Druckschrift DE 198 05 321 C1 gewürdigt. In jüngerer Zeit werden verstärkt Kreuzbodensäcke kleinen Volumens nachgefragt. Ein kleines Volumen lässt sich bei Kreuzbodensäcken durch ein kleineres Bodenmittenmaß realisieren. Zur Herstellung von Säcken mit kleinerem Bodenmittenmaß sind jedoch umfangreiche konstruktive Veränderungen an den Produktionsmitteln und hier natürlich in erster Linie an den Bodenlegevorrichtungen vorzunehmen. Da die Säcke quer zu der Hauptachse des Schlauches durch die Bearbeitungsstationen der Bodenlegevorrichtung transportiert werden, müssen sowohl die Bearbeitungsstationen als auch das Transportsystem schmaler als bisher gestaltet werden.These devices have long been known and they are appreciated, for example in the document DE 198 05 321 C1. More recently, small-volume cross-bottom bags are increasingly in demand. A small volume can be achieved in cross soil bags by a smaller Bodenmittenmaß. However, for the production of bags with smaller Bodenmittenmaß extensive structural changes to the production means and here, of course, primarily to the Bodenlegevorrichtungen make. Since the bags are transported transversely to the main axis of the hose through the processing stations of the bottoming device, both the processing stations and the transport system must be made narrower than before.

Eine der erforderlichen Maßnahmen ist die Verwendung schmalerer Transportriemen zum Transport der Säcke durch die Bearbeitungsstationen der Bodenlegevorrichtung. Die Transportriemen sind jedoch einer erheblichen Zugbelastung ausgesetzt und laufen Gefahr sich zu längen. Diese Tendenz nimmt mit abnehmender Breite der Transportriemen zu. Eine Änderung der Länge der Transportriemen im Betrieb führt jedoch dazu, dass die Sackposition in Bearbeitungsstationen nicht mehr Korrekt mit den Drehbewegungen der Werkzeugwalze abgestimmt sind. Die Werkzeuge durchlaufen ihre Bearbeitungsposition, wenn der Sack noch nicht oder nicht mehr am richtigen Platz befindlich ist, und der zugehörige Bearbeitungsschritt wird ungenau ausgeführt. Die entstehenden Fertigungstoleranzen bei den Säcken können sehr gravierende Qualitätsmängel bei den Säcken nach sich ziehen, welche sich beispielsweise in Undichtigkeit und mangelnder Haltbarkeit gipfeln. Daher sind diese Konsequenzen höchst unerwünscht.One of the necessary measures is the use of narrower transport belts for transporting the sacks through the processing stations of the bottom-laying device. However, the conveyor belts are exposed to a considerable tensile load and run the risk to lengthen. This tendency increases with decreasing width of the transport belts. However, a change in the length of the conveyor belt during operation results in that the bag position in processing stations are no longer correctly aligned with the rotational movements of the tool roll. The tools go through their processing position when the bag is not or no longer at the right place Place is located, and the associated processing step is carried out inaccurate. The resulting manufacturing tolerances in the bags can cause very serious quality defects in the bags, which culminate for example in leakage and lack of durability. Therefore, these consequences are highly undesirable.

Aus diesen Gründen empfiehlt sich die Verwendung von Transportriemen, welche zumindest Bestandteile aus ausgesprochen zugbelastbaren Material wie Stahl aufweisen. In der Regel sind diese Bestandteile des Riemens mit einem deutlich elastischeren weicheren Material ummantelt, welches die transportierten Gegenstände schont. In diesem Zusammenhang sind sogenannte Kabelcortriemen zu nennen, welche in ihrem Kern beinhalten, die in der Regel mit Gummi ummantelt sind.For these reasons, the use of transport belts, which have at least components of extremely tensile material such as steel is recommended. In general, these components of the belt are covered with a much more elastic softer material, which protects the transported objects. In this context, so-called Kabelcortriemen be mentioned, which include in their core, which are usually coated with rubber.

Leider weisen Transportriemen der beschriebenen Art Fertigungstoleranzen auf. Als Folge dieser Fertigungstoleranzen kommt es wieder zu Ungenauigkeiten bei der Positionierung der Säcke in den Bearbeitungspositionen und damit zu Fertigungstoleranzen bei den Säcken.Unfortunately, transport belts of the type described have manufacturing tolerances. As a result of these manufacturing tolerances, it comes back to inaccuracies in the positioning of the bags in the processing positions and thus to manufacturing tolerances in the bags.

Daher besteht die Aufgabe der vorliegenden Erfindung darin, eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 1 und ein Verfahren gemäß dem Oberbegriff des Anspruchs 4 vorzuschlagen, welche die durch die Fertigungstoleranzen des Transportriemens hervorgerufenen Qualitätsmängel der Säcke eingrenzt.Therefore, the object of the present invention is to propose a device according to the preamble of claim 1 and a method according to the preamble of claim 4, which limits the caused by the manufacturing tolerances of the conveyor belt quality defects of the bags.

Diese Aufgabe wird bei einem gattungsgemäßen Gegenstand dadurch getost dass

  • die Antriebscheiben von dem Antriebssystem mit geringerer Winkelgeschwindigkeit antreibbar sind als die zumindest eine Werkzeugwalze und dass
  • die Antriebsscheiben einen größeren Durchmesser aufweisen als die Werkzeugwalzen,
und bei einem gattungsgemäßen Verfahren durch die kennzeichnenden Merkmale des Anspruchs 4.This object is achieved in a generic object by that
  • the drive pulleys are drivable by the drive system at a lower angular speed than the at least one tool roll and that
  • the drive disks have a larger diameter than the tool rollers,
and in a generic method by the characterizing features of claim 4.

Die vorliegende Erfindung macht sich eine ganze Reihe überraschender Erkenntnisse zunutze.The present invention takes advantage of a number of surprising findings.

Bei der Verwendung von Transportriemen mit Bestandteilen aus ausgesprochen zugbelastbaren Material wie Stahl und einem weicheren Schutz beziehungsweise einer weicheren Ummantelung wird der Transportvorgang der Säcke zunächst von dem zugbelastbaren Material bestimmt.When using transport belt with components made of extremely tensile material such as steel and a softer protection or a softer sheathing, the transport process of the bags is first determined by the tensile material.

Damit ist für Transportgeschwindigkeit der Säcke in den Bearbeitungsstationen die Winkelgeschwindigkeit der Transportscheiben und der Abstand des zugbelastbaren Materials von der Achse der Transportscheiben maßgebend. Die letztere Größe, weiche im folgenden als effektiver Scheibenradius bezeichnet wird, setzt sich jedoch aus dem tatsächlichen Radius der Antriebsscheibe und der Dicke der elastischeren weicheren Schicht zwischen dem Außenumfang der Transportscheibe und dem zugbelastbaren Material zusammen. Die Dicke dieser Schicht ist jedoch Schwankungen unterworfen, welche sich auf den effektiven Radius der Transportscheiben und damit auf die Transportgeschwindigkeit übertragen.Thus, for transport speed of the bags in the processing stations, the angular velocity of the transport discs and the distance of the tensile material from the axis of the transport discs prevail. However, the latter size, hereinafter referred to as the effective disk radius, is composed of the actual radius of the drive disk and the thickness of the more elastic softer layer between the outer periphery of the transport disk and the tensile material. However, the thickness of this layer is subject to fluctuations, which are transmitted to the effective radius of the transport discs and thus to the transport speed.

Sie liefern den Hauptbeitrag zu den Ungenauigkeiten bei der Positionierung der Säcke in den Bearbeitungsstationen. Durch die erfindungsgemäßen Maßnahmen wird der relative Anteil der Schwankungen der Dicke der elastischeren weicheren Schicht zwischen dem Außenumfang der Transportscheibe und dem zugbelastbaren Material auf den effektiven Radius der Transportscheibe und damit auf die Transportgeschwindigkeit herabgesetzt.They provide the main contribution to the inaccuracies in the positioning of the bags in the processing stations. By means of the measures according to the invention, the relative proportion of the fluctuations in the thickness of the more elastic softer layer between the outer circumference of the transport disc and the tensile material is reduced to the effective radius of the transport disc and thus to the transport speed.

Besonders bevorzugt wird dabei eine Konfiguration, bei weicher das Verhältnis der Winkelgeschwindigkeit der Antriebsscheiben zu der Winkelgeschwindigkeit der Bearbeitungswalzen 2/3 beträgt. Durch dieses Verhältnis der Winkelgeschwindigkeit von 2/3 verringert sich die Gleichlaufschwankung des Transportriemens ebenfalls um den Faktor 2/3 verglichen mit dem Fall, dass die Antriebsscheiben die gleiche Winkelgeschwindigkeit haben wie die Bearbeitungswalzen.In this case, a configuration in which the ratio of the angular velocity of the drive disks to the angular speed of the machining rollers is 2/3 is particularly preferred. By this ratio of the angular velocity of 2/3, the flutter of the conveyor belt also decreases by a factor of 2/3 as compared with the case that the drive pulleys have the same angular velocity as the processing rollers.

Vorteilhaft ist es dabei, ein Antriebssystem vorzusehen; welches mit Hilfe eines Kegelradgetriebes Drehmoment für zumindest eine Antriebsscheibe von einer Königswelle abzweigt und über ein untersetzendes Planetengetriebe auf die Antriebsscheibe überträgt.It is advantageous to provide a drive system; which, with the aid of a bevel gear, branches off torque for at least one drive disk from a vertical shaft and transmits it to the drive disk via a reduction planetary gear.

Ein Ausführungsbeispiel der Erfindung geht aus den Zeichnungen und der gegenständlichen Beschreibung.
Die einzelnen Figuren zeigen:

Fig. 1
Draufsicht auf einen Ausschnitt einer erfindungsgemäßen Bodenlegevorrichtung
Fig. 2
Seitenansicht gemäß II-II in Fig. 1
Fig. 3
Detailansicht des in Fig. 2 umkreisten Bereichs
Fig. 4
Detailansicht eines Transportriemens
Fig. 5
Getriebekonfiguration zum Antrieb der Antriebsscheiben in einer erfindungsgemäßen Bodenlegevorrichtung
An embodiment of the invention is apparent from the drawings and the subject description.
The individual figures show:
Fig. 1
Top view of a section of a Bodenlegevorrichtung invention
Fig. 2
Side view according to II-II in FIG. 1
Fig. 3
Detail view of the circled in Fig. 2 area
Fig. 4
Detail view of a transport belt
Fig. 5
Transmission configuration for driving the drive pulleys in a Bodenlegevorrichtung invention

Fig. 1 zeigt einen Ausschnitt einer erfindungsgemäßen Bodenlegevorrichtung. Die Schlauchstücke 1 werden flach liegend in Förderrichtung x transportiert. Der Boden 2 der Schlauchstücke 1 wurde bereits gebildet. Die Bildung eines Sackbodens wird beispielsweise in einer anderen unveröffentlichten Patentanmeldung der gleichen Anmelderin mit der Anmefdenummer DE 102 55 483 beschrieben. Das Schlauchstück 1 wird klemmend zwischen den Transportriemen 3 gehalten. Als Beispiel für zwei in einer Bodenlegevorrichtung vorhandene Bearbeitungsstationen werden im Folgenden die Bodenrillstation 30 und die Leimstation 31 beschrieben. Die als Rillmesser ausgebildeten Werkzeuge, die auf dem Umfang der Rillwalzen 7 der Bodenrillstation 30 befestigt sind , versehen die Böden 2 des Schlauchstücks 1 mit einer Bodenrillung, wobei die Gegendruckwalzen 8 die Gegenkraft bereitstellen. Anschließend erfolgt in der Leimstation 31 ein formatmäßiger Klebstoffauftrag auf die Böden 2 der Schlauchstücke 1 durch die Formatwalzen 9. Die Gegendruckwalzen 10 stellen den für den Klebstoffauftrag erforderlichen Gegendruck bereit. Sämtliche Walzen 7, 8, 9, 10 sind auf nicht näher dargestellte Weise im nicht gezeigten Maschinengestell gelagert.Fig. 1 shows a section of a Bodenlegevorrichtung invention. The tube pieces 1 are transported lying flat in the conveying direction x. The bottom 2 of the hose pieces 1 has already been formed. The formation of a sack bottom is described, for example, in another unpublished patent application of the same Applicant with the reference number DE 102 55 483. The piece of tubing 1 is clamped between the conveyor belt 3. As an example of two existing in a Bodenlegevorrichtung processing stations, the Bodenrillstation 30 and the glue station 31 are described below. The tools designed as creasing knives, which are mounted on the circumference of the creasing rollers 7 of Bodenrillstation 30, provided the bottoms 2 of the hose piece 1 with a Bodenrillung, the counter-pressure rollers 8 provide the counterforce. Subsequently, in the glue station 31, a formatted adhesive application to the bottoms 2 of the tube pieces 1 by the size rollers 9. The counter-pressure rollers 10 provide the necessary for the adhesive application Back pressure ready. All rollers 7, 8, 9, 10 are mounted in a manner not shown in the machine frame, not shown.

Der Transportriemen 3 ist als Endlosband ausgebildet und umschlingt an beiden Enden der Bodenlegevorrichtung Umlenkrollen. Der Antrieb der Transportriemen 3 erfolgt durch die Antriebsscheiben 4. Diese werden von der Königswelle 12 ausgehend und durch das anhand der Fig. 5 näher beschriebene Getriebe 5 angetrieben. Um eine ausreichende Haftung des Transportriemens 3 auf der Antriebsscheibe 4 zu gewährleisten, ist rechts und links jeder Antriebsscheibe 4 je eine Umlenkscheibe 6 angeordnet, wie es der Fig. 2 zu entnehmen ist. Diese Umlenkscheiben 6 sind über ihre Lagerzapfen 11 drehbar in dem Maschinengestell gelagert.The transport belt 3 is formed as an endless belt and wraps at both ends of the ground-laying deflecting rollers. The drive of the conveyor belt 3 is effected by the drive pulleys 4. These are driven by the king shaft 12 and driven by the transmission 5 described in detail with reference to FIG. 5. In order to ensure sufficient adhesion of the conveyor belt 3 on the drive pulley 4, each drive pulley 4 is arranged on the right and left each a deflection plate 6, as shown in FIG. 2 can be seen. These deflecting disks 6 are rotatably supported by their bearing journals 11 in the machine frame.

Die Geschwindigkeit des Transportriemens 3 und damit die Transportgeschwindigkeit der Schlauchstücke 1 ergibt sich aus der zurückgelegten Strecke pro Zeiteinheit. Die zurückgelegte Strecke hängt aber von dem Abstand ab, den die Stahllitze 13 des Transportriemens 3 zur Achse der Antriebsscheibe 4 einnimmt. Dieser Abstand wird im Folgenden als Effektivradius Reff bezeichnet. Der Effektivradius Reff ist die Summe aus dem Radius der Antriebsscheibe 5 und der Dicke D des Gummimantels 15 zwischen der Stahllitze 13 und der Oberfläche 17 des Transportriemens 3. Die Oberfläche 17 steht in direktem Kontakt mit dem Außenumfang der Antriebsscheibe 5.The speed of the conveyor belt 3 and thus the transport speed of the hose pieces 1 results from the distance traveled per unit of time. However, the distance traveled depends on the distance from the steel wire 13 of the conveyor belt 3 to the axis of the drive pulley 4 occupies. This distance is referred to below as the effective radius R eff . The effective radius R eff is the sum of the radius of the drive pulley 5 and the thickness D of the rubber sheath 15 between the steel strand 13 and the surface 17 of the conveyor belt 3. The surface 17 is in direct contact with the outer periphery of the drive pulley 5.

Wie der Fig. 3 zu entnehmen ist, besitzt die Dicke D keinen konstanten Wert, sondern variiert zwischen den Werten Dmin und Dmax. Anders ausgedrückt ist der Abstand D mit einem Fehler ΔD behaftet, der sich aus der Differenz von Dmax und Dmin ergibt. Dieser Fehler, der sich aus den Fertigungstoleranzen des Transportriemens ergibt, verursacht unmittelbar Gleichlaufschwankungen des Transportriemens 3 und damit Einbußen in der Fertigungsgüte der Kreuzbodensäcke.As can be seen from FIG. 3, the thickness D does not have a constant value but varies between the values D min and D max . In other words, the distance D is subject to an error ΔD resulting from the difference of D max and D min . This error, which results from the manufacturing tolerances of the conveyor belt, causes immediate synchronization fluctuations of the conveyor belt 3 and thus losses in the production quality of the cross-bottom bags.

Fig. 4 zeigt den Aufbau des Transportriemens 3 in einer perspektivischen Darstellung. Der Transportriemen 3 besteht im wesentlichen aus mehreren, in einer horizontalen Ebene angeordneten Stahllitzen 13 und einem die Stahllitzen 13 umgebenden Gummimantel 15. Da die Stahllitzen 13 im Vergleich zum Gummimantel 15 eine wesentlich höhere Zugfestigkeit haben, stellen die Stahllitzen 13 die so genannte "neutrale Phase" des Transportriemens 3 fest. Das bedeutet, dass sich die Stahllitzen 13 weder stauchen noch dehnen lassen. Transportriemen 3 mit einem derartigen Aufbau werden in der Technik als "Kabelcortriemen" bezeichnet und können aufgrund ihrer Zugfestigkeit schmal gehalten werden. Damit eignen sie sich besonders zur Verwendung in Bodenlegevorrichtungen, mit denen Kreuzbodensäcke mit einem kleinen Bodenmittenmaß hergestellt werden sollen. Bei Verwendung von Transportriemen mit einer geringeren spezifischen Zugfestigkeit müssten diese, um eine vergleichbare Zugfestigkeit zu erhalten, breiter ausgeführt werden. Das minimale Bodenmittenmaß, das eingehalten werden muss, vergrößert sich dementsprechend.Fig. 4 shows the structure of the conveyor belt 3 in a perspective view. The transport belt 3 consists essentially of a plurality of steel strands 13 arranged in a horizontal plane and a rubber jacket 15 surrounding the steel strands 13. Since the steel strands 13 have a substantially higher tensile strength compared to the rubber jacket 15, the steel strands 13 constitute the so-called "neutral phase of the transport belt 3. This means that the steel strands 13 can neither be compressed nor stretched. Conveyor belts 3 having such a structure are referred to in the art as "cable coring belts" and can be kept narrow due to their tensile strength. Thus, they are particularly suitable for use in Bodenlegevorrichtungen, with which Kreuzbodensäcke are to be produced with a small Bodenmittenmaß. When using transport belts with a lower specific tensile strength, they would have to be made wider in order to obtain a comparable tensile strength. The minimum floor center measurement that must be kept increases accordingly.

Die Fig. 5 zeigt eine Ansicht des Getriebes gemäß Fig. 1. Dem Getriebe wird das Antriebsdrehmoment über die Königswelle 12 zugeführt. Die Welle durchsetzt ein Kegelradgetriebe 20, das einen Teil des Drehmomentes abnimmt und auf das Planetengetriebe 21 und die Welle 23 verteilt. Die Welle 23 endet in einem weiteren Kegelradgetriebe 20, das das Drehmoment umlenkt und an ein weiteres Planetengetriebe 21 abgibt. Beide Planetengetriebe 21 treiben jeweils eine Antriebsscheibe 4 an. Alle Getriebeteile 20, 21, 23 sind mit den Tragplatten 18 oder den Stützplatten 19, 22 verbunden, wobei die Stützplatten 19, 22 ebenfalls mit den Tragplatten 18 fest verbunden sind. Die Tragplatten 18 sind auf nicht näher gezeigte Weise am Maschinengestell befestigt. Bezugszeichenliste 1 Schlauchstück 2 Boden 3 Transportriemen 4 Antriebsscheibe 5 Getriebe 6 Umlenkscheibe 7 Rillwalze 8 Gegendruckwalze 9 Formatwalze 10 Gegendruckwalze 11 Lagerzapfen 12 Königswelle 13 Stahllitze 15 Gummimantel 17 Oberfläche des Gummimantels 15 18 Tragplatte 19 Stützplatte 20 Kegelradgetriebe 21 Planetengetriebe 22 Stützplatte 23 Welle 30 Bodenrillstation 31 Leimstation Reff Effektiver Radius D Dicke der Gummischicht Dmin Minimale Dicke der Gummischicht Dmax Maximale Dicke der Gummischicht x Transportrichtung FIG. 5 shows a view of the transmission according to FIG. 1. The drive torque is supplied to the transmission via the king shaft 12. The shaft passes through a bevel gear 20, which decreases a portion of the torque and distributed to the planetary gear 21 and the shaft 23. The shaft 23 ends in a further bevel gear 20, which deflects the torque and delivers to another planetary gear 21. Both planetary gears 21 each drive a drive pulley 4. All gear parts 20, 21, 23 are connected to the support plates 18 or the support plates 19, 22, wherein the support plates 19, 22 are also fixedly connected to the support plates 18. The support plates 18 are attached to the machine frame in a manner not shown in detail. LIST OF REFERENCE NUMBERS 1 hose Connector 2 ground 3 conveyor belts 4 sheave 5 transmission 6 deflection plate 7 grooved roll 8th Backing roll 9 format roller 10 Backing roll 11 pivot 12 Bevel 13 steel cable 15 mackintosh 17 Surface of the rubber jacket 15 18 support plate 19 support plate 20 bevel gear 21 planetary gear 22 support plate 23 wave 30 Bodenrillstation 31 gluing station R eff Effective radius D Thickness of the rubber layer D min Minimal thickness of the rubber layer D max Maximum thickness of the rubber layer x transport direction

Claims (5)

  1. Bottom-applying apparatus for cross-bottom bags, in which flexible-tube portions (1) are processed to form cross-bottom bags, the bottom-applying apparatus having the following features:
    - a plurality of processing stations (30, 31), which carry out different processing steps on the flexible-tube portions (1),
    - at least one processing station (30, 31) being equipped with a tool which is fitted on a tool roller (7, 9) and which passes through its processing position once during each revolution of the roller (7, 9),
    - at least one transporting system (3, 4, 6), which transports the flexible-tube portions (1) through a plurality of processing stations (30, 31) and essentially comprises transporting belts (3) which are driven by transporting pulleys (4),
    - a drive system (5, 12) which drives the drive pulleys (4) and tool rollers (7, 9) and coordinates their rotary movements such that in each case one flexible-tube portion (1) passes through the at least one processing station (30, 31) as the tool roller (7, 9) executes a revolution,
    characterized in that
    - the drive pulleys (4) of the drive system (5, 12) can be driven at a lower angular speed than the at least one tool roller (7, 9), and in that
    - the drive pulleys (4) have a larger diameter than the tool rollers (7, 9).
  2. Bottom-applying apparatus according to Claim 1, characterized by a drive system (5, 12) which defines a ratio of 2/3 between the angular speed of the drive pulleys (4) and angular speed of the tool rollers (7, 9).
  3. Bottom-applying apparatus according to one of the preceding claims, characterized by a drive system (5, 12) which, with the aid of a bevel wheel gear mechanism (20), taps torque for at least one drive pulley (4) from a vertical shaft (12) and transmits it to the drive pulley (4) via a step-down planet gear mechanism (21).
  4. Method of processing flexible-tube portions (1) into cross-bottom bags, the method having the following method features:
    - subjecting the flexible-tube portions (1) to a number of processing steps, the processing steps being carried out in different processing stations (30, 31),
    - in which case, at least in one processing station (30, 31), a processing step is carried out using a tool which is fitted on a rotating tool roller (7, 9) and which passes through its processing position once during each revolution of the roller (7, 9),
    - the transportation of the flexible-tube portions (1) through the processing stations (7, 8, 9, 10) by way of transporting belts (3) which are driven by drive pulleys (4),
    - the driving of the drive pulleys (4) and tool rollers (7, 9), the rotary movements of the two types of roller (4, 7, 9) mentioned above being coordinated such that in each case one flexible-tube portion (1) passes through the at least one processing station (30, 31) as the tool roller (7, 9) executes a revolution,
    characterized in that
    - the drive pulleys (4) are driven at a lower angular speed than the at least one tool roller (7, 9).
  5. Method according to Claim 4, characterized in that the angular speed of the drive pulleys (4) and that of the tool rollers (7, 9) have a ratio of 2/3 in relation to one another.
EP03795873A 2002-12-20 2003-12-05 Bottom positioning device for cross bottom bags Expired - Lifetime EP1578596B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10261256A DE10261256B4 (en) 2002-12-20 2002-12-20 Bottoming device
DE10261256 2002-12-20
PCT/EP2003/013801 WO2004058492A1 (en) 2002-12-20 2003-12-05 Bottom positioning device for cross bottom bags

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EP1578596A1 EP1578596A1 (en) 2005-09-28
EP1578596B1 true EP1578596B1 (en) 2006-06-14

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EP (1) EP1578596B1 (en)
JP (1) JP4778237B2 (en)
AT (1) ATE329749T1 (en)
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CN102189712B (en) * 2011-04-11 2013-07-17 厦门亚太创新机器有限公司 Multifunctional bag making machine
EP3882012A2 (en) 2020-03-18 2021-09-22 Windmöller & Hölscher KG Sack or bag manufacturing device and method for sack or bag manufacturing

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WO2004058492A1 (en) 2004-07-15
JP4778237B2 (en) 2011-09-21
EP1578596A1 (en) 2005-09-28
ATE329749T1 (en) 2006-07-15
US20110124479A1 (en) 2011-05-26
US8894557B2 (en) 2014-11-25
AU2003298167A1 (en) 2004-07-22
DE10261256A1 (en) 2004-08-12
JP2006510513A (en) 2006-03-30
DE50303883D1 (en) 2006-07-27
DE10261256B4 (en) 2004-11-11
US20090221409A1 (en) 2009-09-03
US20050277534A1 (en) 2005-12-15

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