EP1353847A1 - Device for wrapping a stack of goods - Google Patents

Device for wrapping a stack of goods

Info

Publication number
EP1353847A1
EP1353847A1 EP02714101A EP02714101A EP1353847A1 EP 1353847 A1 EP1353847 A1 EP 1353847A1 EP 02714101 A EP02714101 A EP 02714101A EP 02714101 A EP02714101 A EP 02714101A EP 1353847 A1 EP1353847 A1 EP 1353847A1
Authority
EP
European Patent Office
Prior art keywords
gathering
roller
wheel
film section
stack
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
EP02714101A
Other languages
German (de)
French (fr)
Other versions
EP1353847B1 (en
Inventor
Reiner Hannen
Norbert Vermeulen
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.)
MSK Verpackungs Systeme GmbH
Original Assignee
MSK Verpackungs Systeme 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
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Application filed by MSK Verpackungs Systeme GmbH filed Critical MSK Verpackungs Systeme GmbH
Publication of EP1353847A1 publication Critical patent/EP1353847A1/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads

Definitions

  • the invention relates to a device for wrapping a stack of goods with an at least approximately hood-shaped, elastic film section, which is gathered on a gathering device and then stretched in the circumferential direction and pulled over the stack of goods, in particular by means of a pulling device which can be moved along the stack of goods
  • the gathering device has at least two gathering fingers and at least on one connecting line, in particular on two opposite joining lines, between two adjacent gathering fingers each has at least one roller arrangement, consisting of a gathering wheel that is in contact with the outside of the film section and a inside that is essentially opposite the gathering wheel of the film section in contact and enclosing the film section between itself and the gathering wheel for transporting clamping, whereby the film section through the roller arrangement (s) onto the shirred fingers are gathered in the vertical direction like an accordion.
  • a film section is gathered in the longitudinal direction like an accordion and then stretched in the circumferential direction.
  • the gathering device with the foil section gathered thereon like an accordion or the covering device - if the gathered sheet section is placed on one beforehand - is moved downwards along the stack of goods, the gathered sheet section being pulled off and moving to the outside of the stack of goods invests.
  • the gathered film section can also only be stretched after the transfer from the covering device.
  • a roller arrangement consisting of a gathering wheel and a counter roller is provided for gathering the film section on two opposite connecting lines between two adjacent gathering fingers.
  • the gathering wheel is in contact from the outside and the counter roller from the inside with the film section, so that the film section is clamped between the gathering wheel and the counter roll.
  • the axis of rotation of the counter roller is arranged above the axis of rotation of the gathering wheel with respect to the gathered end of the film section, which is usually gathered in the vertical direction.
  • a disadvantage of this previously known device proves that the folds of the gathered end of the film section do not always have a uniform orientation and do not all of the folds resulting from the gathering point obliquely downwards and outwards, but also run partly obliquely downwards and inwards. If a ruched film section of this type is now pretensioned and pulled over the stack of goods, it is not possible to pull the gathered film section evenly, since the folds pointing downwards and outwards prevent the folds pointing downwards and inwards from being pulled off due to the high pretension.
  • the object of the invention is therefore to improve a device described in the introduction so that a perfect gathering is made possible.
  • An advantage of such a device is that the uniform alignment of the folds formed by the gathering takes place without a complex device and without a large number of movable and possibly maintenance-intensive components.
  • the stack of goods to be wrapped can not only consist of stacked goods such.
  • B. bags exist, but it can also be, for example, products from the white goods sector such.
  • B. act refrigerators, which are provided with edge protection elements made of polystyrene before wrapping.
  • the stack of goods it is also quite possible for the stack of goods to be arranged on a pallet, in which case the film section is preferably on the underside around the stack carrying the stack Pallet is struck.
  • a prefabricated tube section or a hood can be used as the film section.
  • the device has a gathering device and a separate covering device
  • the film section gathered by the gathering device in the manner of an accordion is placed on holding elements of the covering device.
  • the holding elements are then moved apart, for example by means of a tensioning drive, as a result of which the film section is pretensioned in the circumferential direction.
  • the holding elements are moved downwards or upwards along the stack of goods, or else the stack of goods is moved downwards or upwards with respect to the holding elements, the gathered film section being pulled off the holding elements and resting on the outside of the stack of goods.
  • the gathering device not only gathers the film section, but also stretches and stretches or stretches.
  • the covering device is provided only for later covering of the film section over the stack of goods.
  • the width of these opposing gathering fingers is somewhat larger than the width of two opposite sides, preferably the narrow sides, of a stack of goods to be wrapped.
  • the roller arrangement (s) can either be integrated in the gathering fingers or be located on the connecting line between two adjacent edges of the opposite gathering fingers.
  • the axis of rotation of the gathering wheel is at an angle of approximately 105 ° gene arranged on the general extent of the shirred film section.
  • the axes of rotation of the respective gathering wheel and counter roller of all roller arrangements are expediently arranged such that the tangent in the respective contact point of the corresponding gathering wheel and the associated counter roller of each roller arrangement likewise points obliquely downwards and outwards. This ensures that the film section is gathered evenly over its entire circumference in obliquely downward and outward folds.
  • At least one Roman wheel can be driven.
  • the diameter of at least one gathering wheel can be larger than the diameter of the associated counter roller. Such an embodiment is appropriate if the gathering device is used simultaneously as a pulling device. Since the counter rolls must not come into contact with the outside of the stack of goods when the film section is pulled over the stack of goods, the film section does not have to be stretched as much because of the smaller diameter of the counter roll.
  • the gathering device has four gathering fingers, in particular as gathering corners which are designed in an angular manner and which then lie in the region of the four plan corners of a square pallet.
  • the gathering device is designed at the same time as a covering device which can be moved along the stack of goods. In this case, the gathering device not only gathers the film section, but also stretches it and pulls it over the stack of goods. Of course, the gathering device is then designed such that it can be moved along the stack of goods. There is then no longer a need for a separate covering device.
  • Fig. 1 is a side view of a stack of goods with a gathering device and a separate pulling device and
  • Fig. 2 shows a detailed view of a roller assembly.
  • Fig. 1 shows a device for wrapping a stack of goods 1 u. a. has a gathering device 2.
  • the stack of goods 1 consists of several packages. Of course, this can also be another packaged good, such as. B. act sacks, which are preferably stacked on a pallet. But it is also quite possible that the stack of goods 1 is a so-called white device such as. B. is a washing machine that is to be wrapped with a film section 3.
  • the gathering device 2 has a roller arrangement 4 and pivotable gathering fingers 5 on two opposite sides of the film section 3. These gather fingers 5 gen on the inside of the film section 3, the gathering fingers 5 angled obliquely to the horizontal and oriented towards the center of the stack 1.
  • Each roller arrangement 4 consists of a gathering wheel 6 and a counter roller 7.
  • the gathering wheel 6 is in contact with the outside of the film section 3, while the counter roll 7 contacts the inside of the film section 3.
  • the counter roller 7 is rotatably attached to the gathering finger 5.
  • the film section 3 is clamped between the gathering wheel 6 and the counter roller 7, so that it is gathered in folds 12 on the gathering fingers 5 in the manner of an accordion.
  • the axis of rotation 8 of the gathering wheel 6 and the axis of rotation 9 of the associated counter roller 7 of a roller arrangement 4 are not arranged at the same height. Rather, the axis of rotation 8 of the gathering wheel 6 is arranged above the axis of rotation 9 of the counter roller 7, so that a tangent 10 in the contact point 11 of the gathering wheel 6 and the associated counter roller 7 points obliquely downwards and outwards. It is thereby achieved that the film section 3 is gathered in folds 12, all of these folds 12 also being oriented obliquely downwards and outwards.
  • the angle between the folds 12 and the general extent of the shirred film section 3 in the shirred and untensioned state is approximately 20 ° to 60 °, in particular 45 °.
  • the axis of rotation 8 of the gathering wheel 6 lies approximately at an angle of 15 ° to the imaginary line 13, which runs horizontally through the axis of rotation 9 of the counter roller 7 in this orientation of the gathering device 2.
  • the angle between the rotary Axis 8 of the gathering wheel 6 for the general extension of the gathered film section 3 about 105 °.
  • the general orientation of the gathered foil section 3 is approximately vertical. But it is also quite possible that the distance between the gathering fingers 5 z. B. decreases slightly downwards.
  • the distance between the gathering fingers 5 is changed by moving the gathering device 2 in the direction of the arrow 14, so that the film section 3 is pretensioned.
  • the thus pre-tensioned film section 3 is then received by holding elements 15 of a pull-over device 16, these holding elements 15 engaging in the interior of the pre-tensioned film section 3 for this purpose.
  • the gathering fingers 5 fold away in the direction of the arrows 18.
  • the covering device 16 is then moved with the film section 3 in the direction of the arrows 19 on the outside along the material tape 1.
  • the gathered film section 3 remains hanging on the upper edge of the stack of goods 1, is pulled off the holding elements 15 and lies against the outside of the stack of goods 1 or a pallet possibly arranged below it.
  • the stretching or stretching of the film section 3 is also carried out by the holding elements 15 of the covering device 16. In this case, only the gathering takes place on the gathering fingers 5 of the gathering device 2, while the stretching and stretching or stretching and the subsequent covering of the film section 3 over the stack of goods 1 by means of the holding elements 15 of the covering device 16.
  • the gathering device 2 is arranged to be movable along the stack of goods 1, the gathering device 2 gathering, stretching and simultaneously covering the stack of goods 1.
  • FIG. 2 shows another embodiment of a gathering device 2.
  • the gathering fingers 5 horizontally arranged and angularly shaped pipes (gathering corners) are provided in the area of the outline corners of the stack of goods 1 to be wrapped.
  • Each gathering corner is connected to a profile 21 via a sheet 20, which is also angled, and which is in turn attached to a travel carriage, not shown.
  • the tangent 10 in the contact point 11 between the gathering wheel 6 and the counter roller 7 is inclined downwards and outwards, so that the folds 12 of the gathered film section 3 also have a correspondingly uniform orientation.
  • the film section 3 can be easily pulled off fold 12 for fold 12 when the stack of goods 1 is pulled over from the holding elements 15 of the pulling device 16.
  • two overlapping opposite folds 12 (orientation once inwards and once outwards) are subtracted.
  • the shirred film section 3 shown in FIGS. 1 and 2 is fed from above by a film feed (not shown) or a finishing device to the gathering device 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Packaging Of Special Articles (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Pile Receivers (AREA)

Abstract

The invention relates to a device for wrapping a stack of goods (1) with a section of a film (3) that is gathered, stretched and put over the stack on a gathering device (2). Said gathering device (2) has at least two gathering fingers (5) and at least one roller arrangement (4) on at least one connecting line between two adjacent gathering fingers (5). The roller arrangement consists of a gathering wheel (6) which is in contact with the exterior of the section of the film and of a counter-roller (7) which is in contact with the interior of the section of the film, and clamps the section of film between itself and the gathering wheel for the purpose of conveying it. In order to obtain a crease structure that points evenly downward and outward at an angle, the axes of rotation (8, 9) of the respective gathering wheel and the counter-roller of at least one roller arrangement should be disposed in such a manner that the tangent (10) in the respective point of contact (11) of the corresponding gathering wheel and of the associated counter-roller of the roller arrangement also points downward and outward at an angle.

Description

Vorrichtung zum Umhüllen eines GutstapelsDevice for wrapping a stack of goods
Die Erfindung betrifft eine Vorrichtung zum Umhüllen eines Gutstapels mit einem zumindest in etwa haubenförmig ausgebildeten, elastischen Folienabschnitt, der auf einer Raffeinrichtung gerafft und anschließend, insbesondere durch eine entlang des Gutstapels bewegbare Überziehvorrichtung, in Umfangsrichtung gestreckt und über den Gut- stapel gezogen wird, wobei die Raffeinrichtung wenigstens zwei Rafffinger und zumindest auf einer Verbindungslinie, insbesondere auf zwei gegenüberliegenden Verbindungslinien, zwischen zwei benachbarten Rafffingern jeweils wenigstens eine Rollenanordnung, bestehend aus einem mit der Außenseite des Folienabschnittes in Kontakt stehenden Raffrad und aus einer dem Raffrad im Wesentlichen gegenüberliegenden, mit der Innenseite des Folienabschnittes in Kontakt stehenden und den Folienabschnitt zwischen sich und dem Raffrad zum Transport klemmend einschließenden Gegenrolle aufweist, wodurch der Folienabschnitt durch die Rollenanordnung (en) auf den Rafffingern im Wesentlichen in vertikaler Richtung zieharmonikaartig gerafft wird.The invention relates to a device for wrapping a stack of goods with an at least approximately hood-shaped, elastic film section, which is gathered on a gathering device and then stretched in the circumferential direction and pulled over the stack of goods, in particular by means of a pulling device which can be moved along the stack of goods the gathering device has at least two gathering fingers and at least on one connecting line, in particular on two opposite joining lines, between two adjacent gathering fingers each has at least one roller arrangement, consisting of a gathering wheel that is in contact with the outside of the film section and a inside that is essentially opposite the gathering wheel of the film section in contact and enclosing the film section between itself and the gathering wheel for transporting clamping, whereby the film section through the roller arrangement (s) onto the shirred fingers are gathered in the vertical direction like an accordion.
Mittels einer derartigen Vorrichtung wird ein Folienabschnitt in Längsrichtung zieharmonikaartig gerafft und dann in Umf ngsrichtung gestreckt . In diesem vorgespannten Zustand wird die Raffeinrichtung mit dem darauf befindlichen zieharmonikaartig gerafften Folienabschnitt oder die Überziehvorrichtung - sofern der geraffte Folienabschnitt vorher auf einer solchen abgelegt wird - längs dem Gutstapel abwärts bewegt, wobei der geraffte Folienabschnitt abgezogen wird und sich an die Außenseite des Gut- stapels anlegt. Hierbei kann auch der geraffte Folienabschnitt erst nach der Übergabe von der Überziehvorrichtung gestreckt werden.By means of such a device, a film section is gathered in the longitudinal direction like an accordion and then stretched in the circumferential direction. In this pretensioned state, the gathering device with the foil section gathered thereon like an accordion or the covering device - if the gathered sheet section is placed on one beforehand - is moved downwards along the stack of goods, the gathered sheet section being pulled off and moving to the outside of the stack of goods invests. In this case, the gathered film section can also only be stretched after the transfer from the covering device.
Bei einer bekannten Vorrichtung ist zum Raffen des Folienabschnittes auf zwei gegenüberliegenden Verbindungslinien zwischen zwei benachbarten Rafffingern je eine Rollenanordnung bestehend aus einem Raffrad und einer Gegenrolle vorgesehen. Von außen steht das Raffrad und von innen die Gegenrolle mit dem Folienabschnitt in Kontakt, so dass der Folienabschnitt zwischen dem Raffrad und der Gegenrolle klemmend eingeschlossen ist. Die Drehachse der Gegenrolle ist, bezogen auf das geraffte Ende des Folienabschnittes, das üblicherweise in vertikaler Richtung gerafft wird, oberhalb der Drehachse des Raffrades angeordnet.In a known device, a roller arrangement consisting of a gathering wheel and a counter roller is provided for gathering the film section on two opposite connecting lines between two adjacent gathering fingers. The gathering wheel is in contact from the outside and the counter roller from the inside with the film section, so that the film section is clamped between the gathering wheel and the counter roll. The axis of rotation of the counter roller is arranged above the axis of rotation of the gathering wheel with respect to the gathered end of the film section, which is usually gathered in the vertical direction.
Als Nachteil dieser vorbekannten Vorrichtung erweist sich, dass die Falten des gerafften Endes des Folienabschnittes nicht immer eine gleichmäßige Ausrichtung aufweisen und nicht alle durch die Raffung entstehenden Falten schräg nach unten und außen weisen, sondern auch teilweise schräg nach unten und innen verlaufen. Wird nun ein derart geraffter Folienabschnitt vorgespannt und über den Gutstapel übergezogen, so ist ein gleichmäßiges Abziehen des gerafften Folienabschnittes nicht möglich, da die nach unten und außen weisenden Falten die nach unten und innen weisenden Falten aufgrund der hohen Vorspannung am Abziehen hindern. Aufgabe der Erfindung ist es daher, eine eingangs beschriebene Vorrichtung so zu verbessern, dass ein einwandfreies Raffen ermöglicht wird.A disadvantage of this previously known device proves that the folds of the gathered end of the film section do not always have a uniform orientation and do not all of the folds resulting from the gathering point obliquely downwards and outwards, but also run partly obliquely downwards and inwards. If a ruched film section of this type is now pretensioned and pulled over the stack of goods, it is not possible to pull the gathered film section evenly, since the folds pointing downwards and outwards prevent the folds pointing downwards and inwards from being pulled off due to the high pretension. The object of the invention is therefore to improve a device described in the introduction so that a perfect gathering is made possible.
Diese Aufgabe wird dadurch gelöst, dass zur Erzielung einer gleichmäßigen, mit ihren Falten jeweils nach schräg unten und außen weisenden Faltenbildung die Drehachsen von jeweiligem Raffrad und Gegenrolle von zumindest einer Rollenanordnung derart angeordnet sind, dass die Tangente im jeweiligen Kontaktpunkt des entsprechenden Raffrades und der zugeordneten Gegenrolle der Rollenanordnung ebenfalls nach schräg unten und außen weist . Hierdurch ist gewährleistet, dass durch die spezielle Ausrichtung der beiden Drehachsen von Raffrad und Gegenrolle zueinander der Folienabschnitt zieharmonikaartig gerafft wird, wobei die Falten immer eine regelmäßige, schräg unten und außen weisende Ausrichtung aufweisen. Aufgrund dieser gleichmäßigen Faltenbildung kann der Folienabschnitt leicht beim Überziehen des Gutstapels abgezogen werden.This object is achieved in that the axes of rotation of the respective gathering wheel and counter-roller of at least one roller arrangement are arranged such that the tangents in the respective contact point of the corresponding gathering wheel and the associated one are arranged in order to achieve a uniform formation of folds with their folds pointing obliquely downward and outward Counter roller of the roller assembly also points obliquely downwards and outwards. This ensures that the special alignment of the two axes of rotation of the Raffrad and counter roller to each other ruches the film section like an accordion, the folds always having a regular, obliquely downward and outward orientation. Due to this uniform formation of folds, the film section can easily be pulled off when the stack of goods is pulled over.
Vorteilhaft an einer solchen Vorrichtung ist, dass die gleichmäßige Ausrichtung der durch die Raffung gebildeten Falten ohne aufwendige Vorrichtung und ohne eine Vielzahl an beweglichen und ggf. wartungsintensiven Bauteilen erfolgt .An advantage of such a device is that the uniform alignment of the folds formed by the gathering takes place without a complex device and without a large number of movable and possibly maintenance-intensive components.
Der zu umhüllende Gutstapel kann nicht nur aus gestapelten Gütern wie z. B. Säcken bestehen, sondern es kann sich auch beispielsweise um Produkte aus dem Weißgerätebereich wie z. B. Kühlschränke handeln, die vor dem Umhüllen mit Kantenschutzelementen aus Styropor versehen werden. Auch ist durchaus möglich, dass der Gutstapel auf einer Palette angeordnet sind, wobei in diesem Fall vorzugsweise der Folienabschnitt unterseitig um die den Gutstapel tragende Palette geschlagen wird. Als Folienabschnitt kann beispielsweise ein konfektionierter Schlauchabschnitt oder eine Haube verwendet werden.The stack of goods to be wrapped can not only consist of stacked goods such. B. bags exist, but it can also be, for example, products from the white goods sector such. B. act refrigerators, which are provided with edge protection elements made of polystyrene before wrapping. It is also quite possible for the stack of goods to be arranged on a pallet, in which case the film section is preferably on the underside around the stack carrying the stack Pallet is struck. For example, a prefabricated tube section or a hood can be used as the film section.
Sofern die Vorrichtung über eine Raffeinrichtung und eine separate Überziehvorrichtung verfügt, wird der zieharmonikaartig durch die Raffeinrichtung geraffte Folienabschnitt auf Halteelementen der Überziehvorrichtung abgelegt . Dann werden die Halteelemente beispielsweise mittels eines Spanntriebes auseinanderbewegt, wodurch der Folienabschnitt in Umfangsrichtung vorgespannt wird. In diesem Zustand werden die Halteelemente längs des Gutstapels abwärts bzw. aufwärts oder aber der GutStapel in Bezug auf die Halteelemente ab- bzw. aufwärtsbewegt, wobei der geraffte Folienabschnitt von den Halteelementen abgezogen wird und sich an die Außenseite des Gutstapels anlegt .If the device has a gathering device and a separate covering device, the film section gathered by the gathering device in the manner of an accordion is placed on holding elements of the covering device. The holding elements are then moved apart, for example by means of a tensioning drive, as a result of which the film section is pretensioned in the circumferential direction. In this state, the holding elements are moved downwards or upwards along the stack of goods, or else the stack of goods is moved downwards or upwards with respect to the holding elements, the gathered film section being pulled off the holding elements and resting on the outside of the stack of goods.
Es ist aber auch durchaus möglich, dass die Raffeinrichtung nicht nur den Folienabschnitt rafft, sondern auch dehnt und stretcht bzw. streckt. In diesem Fall ist die Überziehvorrichtung nur zum späteren Überziehen des Folienabschnittes über den Gutstapel vorgesehen.However, it is also quite possible that the gathering device not only gathers the film section, but also stretches and stretches or stretches. In this case, the covering device is provided only for later covering of the film section over the stack of goods.
Sofern lediglich zwei Rafffinger vorgesehen sind, so ist die Breite dieser gegenüberliegenden Rafffinger etwas größer als die Breite zweier gegenüberliegender Seiten, vorzugsweise der Schmalseiten, eines zu umhüllenden Gutstapels. Die Rollenanordnung (en) kann (können) dabei entweder in den Rafffingern integriert sein oder sich auf der Verbindungslinie zwischen zwei benachbarten Kanten der gegenüberliegenden Rafffinger befinden.If only two gathering fingers are provided, the width of these opposing gathering fingers is somewhat larger than the width of two opposite sides, preferably the narrow sides, of a stack of goods to be wrapped. The roller arrangement (s) can either be integrated in the gathering fingers or be located on the connecting line between two adjacent edges of the opposite gathering fingers.
Bei einer bevorzugten Ausführungsform der Erfindung ist die Drehachse des Raffrades im Winkel von etwa 105° bezo- gen auf die generelle Erstreckung des gerafften Folienabschnittes angeordnet .In a preferred embodiment of the invention, the axis of rotation of the gathering wheel is at an angle of approximately 105 ° gene arranged on the general extent of the shirred film section.
Zweckmäßigerweise sind die Drehachsen vom jeweiligen Raffrad und Gegenrolle von allen Rollenanordnungen derart angeordnet, dass die Tangente im jeweiligen Kontaktpunkt des entsprechenden Raffrades und der zugeordneten Gegenrolle jeder Rollenanordnung ebenfalls nach schräg unten und außen weist. Hierdurch wird gewährleistet, dass der Folienabschnitt über seinen kompletten Umfang gleichmäßig in schräg nach unten und außen weisenden Falten gerafft wird.The axes of rotation of the respective gathering wheel and counter roller of all roller arrangements are expediently arranged such that the tangent in the respective contact point of the corresponding gathering wheel and the associated counter roller of each roller arrangement likewise points obliquely downwards and outwards. This ensures that the film section is gathered evenly over its entire circumference in obliquely downward and outward folds.
Wenigstens ein Raffrad kann dabei antreibbar sein.At least one Roman wheel can be driven.
Dabei kann der Durchmesser von zumindest einem Raffrad größer sein als der Durchmesser der zugeordneten Gegenrolle. Eine solche Ausführungsform bietet sich an, wenn die Raffeinrichtung gleichzeitig als Überziehvorrichtung verwendet wird. Da die Gegenrollen beim Überziehen des Folienabschnittes über den Gutstapel nicht in Kontakt mit der Außenseite des Gutstapels kommen dürfen, muss der Folienabschnitt insoweit aufgrund des geringeren Durchmessers der Gegenrolle nicht so stark gestreckt werden.The diameter of at least one gathering wheel can be larger than the diameter of the associated counter roller. Such an embodiment is appropriate if the gathering device is used simultaneously as a pulling device. Since the counter rolls must not come into contact with the outside of the stack of goods when the film section is pulled over the stack of goods, the film section does not have to be stretched as much because of the smaller diameter of the counter roll.
Dabei ist von Vorteil, wenn die Raffeinrichtung vier Raff- finger, insbesondere als winkelförmig ausgebildete Raffecken, aufweist, die dann im Bereich der vier Grundrissecken einer viereckigen Palette liegen.It is advantageous if the gathering device has four gathering fingers, in particular as gathering corners which are designed in an angular manner and which then lie in the region of the four plan corners of a square pallet.
Sofern der Abstand von zwei benachbarten Rafffinger relativ groß ist, bietet es sich an, wenn wenigstens auf einer Verbindungslinie zwischen zwei benachbarten Rafffingern zwei Rollenanordnungen vorgesehen sind. Es ist auch durchaus möglich, dass die Raffeinrichtung gleichzeitig als entlang des Gutstapels bewegbare Überziehvorrichtung ausgebildet ist. In diesem Fall rafft die Raffeinrichtung nicht nur den Folienabschnitt, sondern streckt ihn gleichzeitig und zieht ihn über den Gutstapel . Selbstverständlich ist dann die Raffeinrichtung so ausgebildet, dass sie entlang des Gutstapels bewegbar ist. Es bedarf dann keiner separaten Überziehvorrichtung mehr.If the distance from two adjacent gathering fingers is relatively large, it makes sense if at least one roller arrangement is provided on a connecting line between two adjacent gathering fingers. It is also entirely possible for the gathering device to be designed at the same time as a covering device which can be moved along the stack of goods. In this case, the gathering device not only gathers the film section, but also stretches it and pulls it over the stack of goods. Of course, the gathering device is then designed such that it can be moved along the stack of goods. There is then no longer a need for a separate covering device.
Im Folgenden wird ein in den Zeichnungen dargestelltes Ausführungsbeispiel der Erfindung erläutert. Es zeigen:An exemplary embodiment of the invention illustrated in the drawings is explained below. Show it:
Fig. 1 eine Seitenansicht auf einen Gutstapel mit einer Raffeinrichtung und einer separaten Überziehvorrichtung undFig. 1 is a side view of a stack of goods with a gathering device and a separate pulling device and
Fig. 2 eine Detailansicht auf eine Rollenanordnung.Fig. 2 shows a detailed view of a roller assembly.
In beiden Figuren werden für gleiche bzw. gleichartige Bauteile die gleichen Bezugszeichen verwendet .The same reference numerals are used in both figures for identical or similar components.
Fig. 1 zeigt eine Vorrichtung zum Umhüllen eines Gutstapels 1, die u. a. eine Raffeinrichtung 2 aufweist. In dem dargestellten Fall besteht der Gutstapel 1 aus mehreren Paketen. Hierbei kann es sich selbstverständlich auch um ein anderes Packgut, wie z. B. Säcke handeln, die vorzugsweise auf einer Palette gestapelt sind. Es ist aber auch durchaus möglich, dass es sich bei dem Gutstapel 1 um ein so genanntes Weißgerät wie z. B. eine Waschmaschine handelt, das mit einem Folienabschnitt 3 umhüllt werden soll.Fig. 1 shows a device for wrapping a stack of goods 1 u. a. has a gathering device 2. In the case shown, the stack of goods 1 consists of several packages. Of course, this can also be another packaged good, such as. B. act sacks, which are preferably stacked on a pallet. But it is also quite possible that the stack of goods 1 is a so-called white device such as. B. is a washing machine that is to be wrapped with a film section 3.
Die Raffeinrichtung 2 weist an zwei gegenüberliegenden Seiten des Folienabschnittes 3 je eine Rollenanordnung 4 und schwenkbare Rafffinger 5 auf. Diese Rafffinger 5 lie- gen innenseitig an dem Folienabschnitt 3 an, wobei die Rafffinger 5 oberseitig schräg zur Horizontalen abgewinkelt und zur Mitte des Gutstapels 1 weisend ausgerichtet .The gathering device 2 has a roller arrangement 4 and pivotable gathering fingers 5 on two opposite sides of the film section 3. These gather fingers 5 gen on the inside of the film section 3, the gathering fingers 5 angled obliquely to the horizontal and oriented towards the center of the stack 1.
Jede Rollenanordnung 4 besteht aus einem Raffrad 6 und aus einer Gegenrolle 7. Das Raffrad 6 steht dabei mit der Außenseite des Folienabschnittes 3 in Kontakt, während die Gegenrolle 7 innenseitig den Folienabschnitt 3 berührt . Die Gegenrolle 7 ist drehbar am Rafffinger 5 befestigt . Zwischen dem Raffrad 6 und der Gegenrolle 7 wird der Folienabschnitt 3 klemmend eingeschlossen, so dass dieser zieharmonikaartig in Falten 12 auf den Rafffingern 5 gerafft wird.Each roller arrangement 4 consists of a gathering wheel 6 and a counter roller 7. The gathering wheel 6 is in contact with the outside of the film section 3, while the counter roll 7 contacts the inside of the film section 3. The counter roller 7 is rotatably attached to the gathering finger 5. The film section 3 is clamped between the gathering wheel 6 and the counter roller 7, so that it is gathered in folds 12 on the gathering fingers 5 in the manner of an accordion.
Wie in den Figuren 1 und 2 deutlich zu erkennen ist, sind die Drehachse 8 des Raffrades 6 und die Drehachse 9 der zugehörigen Gegenrolle 7 einer Rollenanordnung 4 nicht auf derselben Höhe angeordnet . Vielmehr ist die Drehachse 8 des Raffrades 6 oberhalb der Drehachse 9 der Gegenrolle 7 angeordnet, so dass eine Tangente 10 im Kontaktpunkt 11 des Raffrades 6 und der zugeordneten Gegenrolle 7 nach schräg unten und außen weist. Hierdurch wird erreicht, dass der Folienabschnitt 3 in Falten 12 gerafft wird, wobei sämtliche dieser Falten 12 ebenfalls nach schräg unten und außen ausgerichtet sind. Der Winkel zwischen den Falten 12 und der generellen Erstreckung des gerafften Folienabschnittes 3 beträgt im gerafften und ungespannten Zustand dabei in etwa 20° bis 60°, insbesondere 45°.As can be clearly seen in FIGS. 1 and 2, the axis of rotation 8 of the gathering wheel 6 and the axis of rotation 9 of the associated counter roller 7 of a roller arrangement 4 are not arranged at the same height. Rather, the axis of rotation 8 of the gathering wheel 6 is arranged above the axis of rotation 9 of the counter roller 7, so that a tangent 10 in the contact point 11 of the gathering wheel 6 and the associated counter roller 7 points obliquely downwards and outwards. It is thereby achieved that the film section 3 is gathered in folds 12, all of these folds 12 also being oriented obliquely downwards and outwards. The angle between the folds 12 and the general extent of the shirred film section 3 in the shirred and untensioned state is approximately 20 ° to 60 °, in particular 45 °.
Wie insbesondere in Fig. 2 dargestellt, liegt die Drehachse 8 des Raffrades 6 in etwa im Winkel von 15° zur gedachten Linie 13, die bei dieser Ausrichtung der Raffeinrichtung 2 horizontal durch die Drehachse 9 der Gegenrolle 7 verläuft . Insoweit beträgt der Winkel zwischen der Dreh- achse 8 des Raffrades 6 zur generellen Erstreckung des gerafften Folienabschnittes 3 etwa 105°.As shown in particular in FIG. 2, the axis of rotation 8 of the gathering wheel 6 lies approximately at an angle of 15 ° to the imaginary line 13, which runs horizontally through the axis of rotation 9 of the counter roller 7 in this orientation of the gathering device 2. In this respect, the angle between the rotary Axis 8 of the gathering wheel 6 for the general extension of the gathered film section 3 about 105 °.
Wie den Figuren 1 und 2 zu entnehmen ist, ist die generelle Ausrichtung des gerafften Folienabschnittes 3 in etwa vertikal. Es ist aber auch durchaus möglich, dass der Abstand der Rafffinger 5 z. B. nach unten geringfügig abnimmt .As can be seen from FIGS. 1 and 2, the general orientation of the gathered foil section 3 is approximately vertical. But it is also quite possible that the distance between the gathering fingers 5 z. B. decreases slightly downwards.
Nach dem Raffen des Folienabschnittes 3 wird zum Dehnen und Strecken bzw. Stretchen des Folienabschnittes 3 der Abstand der Rafffinger 5 durch Verschieben der Raffeinrichtung 2 in Richtung des Pfeils 14 verändert, so dass der Folienabschnitt 3 vorgespannt wird. Der so vorgespannte Folienabschnitt 3 wird dann von Halteelementen 15 einer Überziehvorrichtung 16 aufgenommen, wobei diese Halteelemente 15 hierzu in das Innere des vorgespannten Folienabschnittes 3 eingreifen. Nachdem die Halteelemente 15 durch Bewegung in Richtung des Pfeils 17 innenseitig mit dem vorgespannten und gerafften Folienabschnitt 3 in Berührung sind, klappen die Rafffinger 5 in Richtung der Pfeile 18 weg. Die Überziehvorrichtung 16 wird dann mit dem Folienabschnitt 3 in Richtung der Pfeile 19 außenseitig entlang des Gutstapeis 1 verfahren. Der geraffte Folienabschnitt 3 bleibt dabei an der Oberkante des Gutstapels 1 hängen, wird dabei von den Halteelementen 15 abgezogen und legt sich an die Außenseite des Gutstapeis 1 bzw. einer eventuell darunter angeordneten Palette an.After gathering the film section 3, for stretching and stretching or stretching the film section 3, the distance between the gathering fingers 5 is changed by moving the gathering device 2 in the direction of the arrow 14, so that the film section 3 is pretensioned. The thus pre-tensioned film section 3 is then received by holding elements 15 of a pull-over device 16, these holding elements 15 engaging in the interior of the pre-tensioned film section 3 for this purpose. After the holding elements 15 are in contact with the pretensioned and gathered film section 3 by movement in the direction of arrow 17, the gathering fingers 5 fold away in the direction of the arrows 18. The covering device 16 is then moved with the film section 3 in the direction of the arrows 19 on the outside along the material tape 1. The gathered film section 3 remains hanging on the upper edge of the stack of goods 1, is pulled off the holding elements 15 and lies against the outside of the stack of goods 1 or a pallet possibly arranged below it.
Es ist durchaus möglich, dass auch das Strecken bzw. das Stretchen des Folienabschnittes 3 durch die Halteelemente 15 der Überziehvorrichtung 16 erfolgt . In diesem Fall findet lediglich das Raffen auf den Rafffingern 5 der Raffeinrichtung 2 statt, während das Dehnen und Strecken bzw. Stretchen und das anschließende Überziehen des Folienabschnitts 3 über den Gutstapel 1 mittels der Halteelemente 15 der Überziehvorrichtung 16 erfolgt.It is quite possible that the stretching or stretching of the film section 3 is also carried out by the holding elements 15 of the covering device 16. In this case, only the gathering takes place on the gathering fingers 5 of the gathering device 2, while the stretching and stretching or stretching and the subsequent covering of the film section 3 over the stack of goods 1 by means of the holding elements 15 of the covering device 16.
Sofern auf die separate Überziehvorrichtung 16 verzichtet wird, ist die Raffeinrichtung 2 entlang des Gutstapels 1 bewegbar angeordnet, wobei die Raffeinrichtung 2 den Folienabschnitt 3 rafft, streckt und gleichzeitig über den Gutstapel 1 überzieht.If the separate covering device 16 is dispensed with, the gathering device 2 is arranged to be movable along the stack of goods 1, the gathering device 2 gathering, stretching and simultaneously covering the stack of goods 1.
Fig. 2 zeigt eine andere Ausführungsform einer Raffeinrichtung 2. Hier sind als Rafffinger 5 im Bereich der Grundrissecken des zu umhüllenden Gutstapels 1 horizontal angeordnete und winkelförmig ausgebildete Rohre (Raffecken) vorgesehen. Jede Raffecke ist über ein ebenfalls abgewinkeltes Blech 20 mit einem Profil 21 verbunden, das wiederum an einem nicht dargestellten Verfahrschlitten befestigt ist.2 shows another embodiment of a gathering device 2. Here, as the gathering fingers 5, horizontally arranged and angularly shaped pipes (gathering corners) are provided in the area of the outline corners of the stack of goods 1 to be wrapped. Each gathering corner is connected to a profile 21 via a sheet 20, which is also angled, and which is in turn attached to a travel carriage, not shown.
Wie deutlich zu erkennen ist, weist die Tangente 10 im Kontaktpunkt 11 zwischen dem Raffrad 6 und der Gegenrolle 7 schräg nach unten und außen, so dass insoweit auch die Falten 12 des gerafften Folienabschnittes 3 eine entsprechende gleichmäßige Ausrichtung haben.As can be clearly seen, the tangent 10 in the contact point 11 between the gathering wheel 6 and the counter roller 7 is inclined downwards and outwards, so that the folds 12 of the gathered film section 3 also have a correspondingly uniform orientation.
Durch die gleichmäßige Ausrichtung der Falten 12 kann der Folienabschnitt 3 problemlos Falte 12 für Falte 12 beim Überziehen des Gutstapels 1 von den Halteelementen 15 der Überziehvorrichtung 16 abgezogen werden. Im Gegensatz zu vorbekannten Vorrichtungen, bei denen keine einheitliche Ausrichtung der Falten 12 erzielt werden kann und bei denen die Falten 12 nach außen und teilweise nach innen gerichtet sind, werden daher nicht gleichzeitig zwei über- einanderliegende Falten 12 (Ausrichtung einmal nach innen und einmal nach außen) abgezogen.Due to the uniform alignment of the folds 12, the film section 3 can be easily pulled off fold 12 for fold 12 when the stack of goods 1 is pulled over from the holding elements 15 of the pulling device 16. In contrast to previously known devices, in which no uniform alignment of the folds 12 can be achieved and in which the folds 12 are directed outwards and partly inwards, therefore two overlapping opposite folds 12 (orientation once inwards and once outwards) are subtracted.
Der in den Figuren 1 und 2 dargestellte geraffte Folienabschnitt 3 wird von oben von einer nicht dargestellten Folienzuführung bzw. einer Konfektionierungseinrichtung der Raffeinrichtung 2 zugeführt . The shirred film section 3 shown in FIGS. 1 and 2 is fed from above by a film feed (not shown) or a finishing device to the gathering device 2.

Claims

Ansprüche Expectations
1. Vorrichtung zum Umhüllen eines Gutstapeis (1) mit einem zumindest in etwa haubenförmig ausgebildeten, elastischen Folienabschnitt (3) , der auf einer Raffeinrichtung (2) gerafft und anschließend, insbesondere durch eine entlang des Gutstapels (1) bewegbare Überziehvorrichtung (16) , in Umfangsrichtung gestreckt und über den Gutstapel (1) gezogen wird, wobei die Raffeinrichtung (2) wenigstens zwei Rafffinger (5) und zumindest auf einer Verbindungslinie, insbesondere auf zwei gegenüberliegenden Verbindungslinien, zwischen zwei benachbarten Rafffingern (5) jeweils wenigstens eine Rollenanordnung (4) , bestehend aus einem mit der Außenseite des Folienabschnittes (3) in Kontakt stehenden Raffrad (6) und aus einer dem Raffrad (6) im Wesentlichen gegenüberliegenden, mit der Innenseite des Folienabschnittes (3) in Kontakt stehenden und den Folienabschnitt (3) zwischen sich und dem Raffrad (6) zum Transport klemmend einschließenden Gegenrolle (7) aufweist, wodurch der Folienabschnitt (3) durch die Rollenanordnung (en) (4) auf den Rafffingern (5) im Wesentlichen in vertikaler Richtung zieharmonikaartig gerafft wird, dadurch gekennzeichnet, dass zur Erzielung einer gleichmäßigen, mit ihren Falten (12) jeweils nach schräg unten und außen weisenden Faltenbildung die Drehachsen (8, 9) von jeweiligem Raffrad (6) und Gegenrolle (7) von zumindest einer Rollenanordnung (4) derart angeordnet sind, dass die Tangente (10) im jeweiligen Kontaktpunkt (11) des entspre- chenden Raffrades (6) und der zugeordneten Gegenrolle (7) der Rollenanordnung (4) ebenfalls nach schräg unten und außen weist .1. Device for wrapping a stack of goods (1) with an at least approximately hood-shaped, elastic film section (3) which is gathered on a gathering device (2) and then, in particular by a covering device (16) movable along the stack of goods (1), stretched in the circumferential direction and pulled over the stack of goods (1), the gathering device (2) having at least two gathering fingers (5) and at least one roller arrangement (4) in each case between two adjacent gathering fingers (5) on at least one connecting line, in particular on two opposite connecting lines ), consisting of a gathering wheel (6) which is in contact with the outside of the film section (3) and a substantially opposite the gathering wheel (6), which is in contact with the inside of the film section (3) and between the film section (3) itself and the gathering wheel (6) for transport, which includes a clamping roller (7), whereby the film section t (3) is gathered by the roller arrangement (s) (4) on the gathering fingers (5) essentially in the vertical direction like an accordion, characterized in that in order to achieve a uniform, with their folds (12) each pointing obliquely downwards and outwards Wrinkle formation, the axes of rotation (8, 9) of the respective gathering wheel (6) and counter roller (7) of at least one roller arrangement (4) are arranged in such a way that the tangent (10) in the respective contact point (11) of the corresponding The corresponding Roman wheels (6) and the associated counter roller (7) of the roller arrangement (4) also point obliquely downwards and outwards.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drehachse (8) des Raffrades (6) im Winkel von etwa 105° bezogen auf die generelle Erstreckung des gerafften Folienabschnittes (3) angeordnet ist.2. Device according to claim 1, characterized in that the axis of rotation (8) of the gathering wheel (6) is arranged at an angle of approximately 105 ° with respect to the general extent of the gathered film section (3).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Drehachsen (8, 9) vom jeweiligen Raff- rad (6) und Gegenrolle (7) von allen Rollenanordnungen (4) derart angeordnet sind, dass die Tangente (10) im jeweiligen Kontaktpunkt (11) des entsprechenden Raffrades3. Device according to claim 1 or 2, characterized in that the axes of rotation (8, 9) of the respective shirring wheel (6) and counter roller (7) of all roller arrangements (4) are arranged such that the tangent (10) in respective contact point (11) of the corresponding gathering wheel
(6) und der zugeordneten Gegenrolle (7) jeder Rollenanordnung (4) ebenfalls nach schräg unten und außen weist.(6) and the associated counter roller (7) of each roller arrangement (4) also points obliquely downwards and outwards.
4... Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass wenigstens ein Raffrad (6) antreibbar ist .4 ... Device according to one of claims 1 to 3, characterized in that at least one gathering wheel (6) can be driven.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Durchmesser von zumindest einem Raffrad (6) größer ist als der Durchmesser der zugeordneten Gegenrolle (7) .5. Device according to one of claims 1 to 4, characterized in that the diameter of at least one gathering wheel (6) is larger than the diameter of the associated counter roller (7).
6.. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Raffeinrichtung (2) vier Rafffinger (5) , insbesondere als winkelförmig ausgebildete Raffecken, aufweist.6 . , Device according to one of claims 1 to 5, characterized in that the gathering device (2) has four gathering fingers (5), in particular as angled gathering corners.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass wenigstens auf einer Verbindungslinie zwischen zwei benachbarten Rafffingern (5) zwei Rollenanordnungen (4) vorgesehen sind.7. Device according to one of claims 1 to 6, characterized in that at least on a connecting line two roller arrangements (4) are provided between two adjacent gathering fingers (5).
8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Raffeinrichtung (2) gleichzeitig als entlang des Gutstapels (1) bewegbare Überziehvorrichtung (16) ausgebildet ist. 8. Device according to one of claims 1 to 7, characterized in that the gathering device (2) is simultaneously designed as a pulling device (16) movable along the stack of goods (1).
EP02714101A 2001-01-25 2002-01-23 Device for wrapping a stack of goods Expired - Lifetime EP1353847B1 (en)

Applications Claiming Priority (3)

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DE20101909U 2001-01-25
DE20101909U DE20101909U1 (en) 2001-01-25 2001-01-25 Device for wrapping a stack of goods
PCT/EP2002/000633 WO2002058997A1 (en) 2001-01-25 2002-01-23 Device for wrapping a stack of goods

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MXPA03006694A (en) 2003-10-24
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CN1253349C (en) 2006-04-26
US20040107677A1 (en) 2004-06-10
CZ299954B6 (en) 2009-01-07
DE20101909U1 (en) 2002-06-13
US6865865B2 (en) 2005-03-15
WO2002058997A1 (en) 2002-08-01
CN1498180A (en) 2004-05-19
DE50207102D1 (en) 2006-07-20
PL363318A1 (en) 2004-11-15
DK1353847T3 (en) 2006-10-09
ATE328795T1 (en) 2006-06-15
PL205627B1 (en) 2010-05-31

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