EP0198301B1 - Sheathing device - Google Patents

Sheathing device Download PDF

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Publication number
EP0198301B1
EP0198301B1 EP86104330A EP86104330A EP0198301B1 EP 0198301 B1 EP0198301 B1 EP 0198301B1 EP 86104330 A EP86104330 A EP 86104330A EP 86104330 A EP86104330 A EP 86104330A EP 0198301 B1 EP0198301 B1 EP 0198301B1
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EP
European Patent Office
Prior art keywords
film tubing
sensors
adjustment carriage
carriage
separating blades
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
Application number
EP86104330A
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German (de)
French (fr)
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EP0198301A1 (en
Inventor
Willy Wanders
Heinz Berns
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.)
Vfi Gesellschaft fur Verpackungstechnik Mbh
Original Assignee
Vfi Gesellschaft fur Verpackungstechnik Mbh
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Application filed by Vfi Gesellschaft fur Verpackungstechnik Mbh filed Critical Vfi Gesellschaft fur Verpackungstechnik Mbh
Priority to AT86104330T priority Critical patent/ATE34350T1/en
Publication of EP0198301A1 publication Critical patent/EP0198301A1/en
Application granted granted Critical
Publication of EP0198301B1 publication Critical patent/EP0198301B1/en
Expired legal-status Critical Current

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    • 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 film covering device for wrapping goods, in particular objects stacked on pallets, by means of a film tube, which is fed with pinched folds on the side via an upper main deflection roller, following which separating plates are inserted between the pinch folds from both sides and the film tube is gripped, spread and pulled over the goods by means of pairs of clamping jaws provided on opposite sides thereof on a vertically movable carriage, the sensors between the separating plates and the main deflection roller responding to the edge position of the film tube and the latter with its lateral side Control edges in the area of the dividing plates.
  • Such a film covering device is known from DE-OS-3 011 264.2.
  • the separating plates are used above the film tube to the jaws conveying rollers, so that the film tube is electrostatically discharged and can no longer stick together.
  • the jaws are arranged as two pairs opposite each other, so that they are able to support each other with their surfaces lying against the film tube. They are, while they are supported against each other, still movable relative to each other with respect to their individual clamping jaws, so that the film tube then gets between the facing crushing surfaces of each pair of clamping jaws and is finally clamped in the end position of the clamping jaws.
  • the applicability of the clamping jaws on the one hand presupposes a high frictional resistance between them and the adjacent surfaces of the film tube, and on the other hand the film tube with its mutually facing surfaces of the pinch folds must have very good sliding properties.
  • the sliding properties can be produced by appropriate coatings, but it is difficult to limit them to the areas of the pinch folds, so that there is often inadvertent sliding even in the area of the intended high frictional resistance to the clamping jaws, the film no longer being encased.
  • the prerequisite is that the edge position of the film tube is aligned with the separating plates.
  • the sensors respond to the edge position of the film tube and control the latter into the intended central position.
  • the arrangement mentioned is located directly below the main deflection roller, only limited positional deviations can be detected in the sense mentioned.
  • the object of the invention is to make further developments such that both positional deviations of the supplied film tubes and direct dimensional deviations of the same can be permitted to a greater extent than previously without the risk that the tube edges of the jaws are not sufficiently grasped. It should also be ensured that no more edge width has to be grasped by the clamping jaws than is absolutely necessary, so that the film hoods can be guided over the stacked goods to a large extent.
  • the film hood should also be kept completely taut using the spreading finger.
  • the arrangement should be such that it can be used especially in the embodiment provided for the processing of lubricant-free film tubes according to German patent application P-3 422 027.5, according to which the pairs of jaws are supported on the separating plates.
  • the use of the adjusting carriage, which can be moved in the vertical direction, together with the clamping device, enables the film tube to be conveyed from an upper gripping position to a lower position, in which the clamping jaws act on the film tube.
  • the film tube runs over the main deflection roller. For reasons of dimension and positional deviations, it is inevitable that the film tube runs more or less. This is not particularly troublesome in terms of the length of a single cut to be made after the insertion carriage for a film hood, but the course of the film tube, if it is not corrected, would considerably interfere with subsequent hoods.
  • the invention now makes it possible, with the clamping device open, while the setting carriage is returning from the bottom upwards, to readjust the setting carriage to the center of the film, by using the signals displayed by the sensors for controlling the horizontal movement of the setting carriage.
  • the horizontal movement must therefore be ensured to the extent of the positional deviations and the dimensional deviations of the film tube. If an effective correction of the course of the film tube is then again carried out in the outermost height position under similar conditions, it is advantageous that the film tube also has a greater length by the auxiliary deflection roller protruding from the main deflection roller in the outermost height position of the insertion carriage. This creates a free film web without contact with the main deflection roller, which can be effectively corrected in its position without being affected by friction on the main deflection roller.
  • the processes mentioned can largely be incorporated into an automatic control.
  • This purpose is served by a signal transmitter on the setting carriage, which acts on the stationary switches of the machine frame in such a way that the horizontal drive of the setting carriage is controlled at the center position of the main deflection roller in the extreme height position.
  • the difference with regard to the control of the film tube stretched in vertical position compared to the latter type of control is that in the former case the position of the film tube is detected directly by the sensors, whereas in the second case the position of the trolley, which then corresponds to the position of the film tube , is detected by means of the stationary switch and the signal transmitter acting thereon.
  • the clamping device is closed during the latter orientation of the film tube. It is expediently realized in that clamping jaws are pressed onto the separating plates.
  • the two aligning processes of the film tube can be automatically and effectively switched over if a switch that responds to the outermost height of the insertion carriage is provided, which then takes over the reversal of the horizontal drive of the insertion carriage from the sensors to the stationary switches.
  • the switches provided are essentially known embodiments which can be operated largely without contact.
  • ultrasound heads are used as sensors, which have transmitters and receivers in a concentric arrangement and which respond to sound-reflecting surfaces.
  • the edge zones of the film tubes reliably reflect the sound.
  • the setting carriage 4 can be seen with the separating plates 1 which are arranged firmly on both sides thereof and which protrude into the pinch folds of the film tube 3.
  • the sensors 2, which are aligned with the edges 15 of the film tube 3, are provided on the setting carriage 4.
  • the auxiliary deflection roller 6 runs above this.
  • the mechanical clamping devices 5 work together with the separating plates 1, such as Above all, the side view of Figure 1 can be seen, can be clamping jaws that can be pressed against the partition plates 1 by means of actuating cylinders.
  • the setting carriage 4 can be moved by means of rollers 17 on a carriage 18 extending in the horizontal direction, in that a horizontal drive 11 runs between the latter and the setting carriage 4.
  • the carriage 18 is in turn guided on rails 20 by means of rollers 21.
  • the ends of a revolving chain 22 engage the carriage 18 at the top and bottom.
  • the drive motor 12 drives the chain 22 via a gear wheel to the extent of the vertical movement of the trolley 4 that is provided in each case.
  • the device described above for the horizontal and vertical drive of the insertion carriage 4 are only shown on the left side of the front view according to FIG. 1. In a corresponding arrangement, they are also located on the right side of the setting carriage 4. On the latter side, the signal flag 9 can be seen, which acts on the two fixed switches 10, which can only be seen in FIG.
  • the switch 13 which is responsive to this, is used to determine the uppermost altitude, which the adjusting carriage 13 can assume.
  • a further switch 14 attached to the carriage 4 interacts with a bar 23, which corresponds to the distance between the lower position and the upper position of the insertion carriage.
  • the phase can be switched within which the sensors 2 control the horizontal drive 11 for the purpose of aligning the film tube course.
  • FIG. 1 shows the starting position of the setting carriage 4, in which the cutting and welding device, not shown in the drawing, has made a cut according to the dash-dotted line 24, the setting carriage 4 according to FIG. 2 has been moved downward through the opened separating and welding device the clamping device 5 is closed. From this position, the clamping jaws 8 take over the lower edge of the film tube according to FIG. 3, so that the clamping device 5 can then be opened. As soon as this happens, the control in the horizontal adjustment 11 by means of the sensors 15 is free for the purpose of aligning the film tube.
  • FIG. 4 accordingly shows a setting carriage 4 which is raised when the clamping device 5 is open and which can be moved in the direction of the double arrow 25. With respect to the main deflection roller 7, a lateral displacement can result, as illustrated in FIG. 5 with the clamping device 5 already closed again.
  • FIG. 6 The position of the trolley 4 which has been transferred from the upper position to the highest position is shown in FIG. 6 in a side view.
  • the upper deflection roller 7 is covered, so that the film tube 3 is kept contact-free over a longer length.
  • the trolley 4 is initially still in the position shifted to the right, in which the signal flag 9 acts only on one of the two fixed switches 10.
  • the setting carriage moves from this position in the direction of arrow 26 until the signal flag 9 acts on both stationary switches 10 again.
  • the clamping device remains in the closed position. From this position, the setting carriage 4 finally returns to its starting position, as shown in FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Advancing Webs (AREA)
  • Processing Of Meat And Fish (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Replacement Of Web Rolls (AREA)

Abstract

1. A device for wrapping articles by pulling a plastic film tubing (3) over said articles, especially over goods stapled on pallets, with the film tubing (3) laterally pleated inwards being fed via an upper main reflecting roller (7) followed by separating blades (1) inserted into the lateral pleats from both sides, the film tubing (3) being gripped, spread and pulled over the articles by clamping jaws (8) provided on vertically movable slides (18) in pairs in opposition close to both edges of the film tubing (3) the edge position of which is monitored by sensors (2) placed between the separating blades (1) and the main deflecting roller (3), said sensors (2) directing the lateral edges of the film tubing into the area of the separating blades (1), characterized by the separating blades (1) and the sensors (2) being arranged on a vertically movalbe adjustment carriage (4) movable horizontally to the extent of the deviations of the film tubing (3), and supporting a clamping device (5) effective to the film tubing (3) alternative, and supporting an upper assisting deflecting roller (6) which overtops the main deflecting roller (7) in the uppermost position of the adjustment carriage (4) that is movable downwards into the zone of the clamping jaws (8).

Description

Die Erfindung bezieht sich auf eine Folienüberziehvorrichtung zum Umhüllen von Gütern, insbesondere von auf Paletten gestapelten Gegenständen, mittels eines Folienschlauches, der mit seitlich eingeschlagenen Quetschfalten über eine obere Hauptumlenkrolle zugeführt wird, im Anschluß an welche zwischen die Quetschfalten von beiden Seiten her Trennplatten eingeführt sind und der Folienschlauch mittels an sich gegenüberliegenden Stellen desselben jeweils in dessen Randnähe an einem vertikal bewegbaren Schlitten vorgesehenen Paaren von Klemmbacken ergriffen, gespreizt und über die Güter gezogen wird, wobei zwischen den Trennplatten und der Hauptumlenkrolle Sensoren auf die Kantenlage des Folienschlauches ansprechen und letzteren mit seinen seitlichen Rändern in den Bereich der Trennplatten steuern.The invention relates to a film covering device for wrapping goods, in particular objects stacked on pallets, by means of a film tube, which is fed with pinched folds on the side via an upper main deflection roller, following which separating plates are inserted between the pinch folds from both sides and the film tube is gripped, spread and pulled over the goods by means of pairs of clamping jaws provided on opposite sides thereof on a vertically movable carriage, the sensors between the separating plates and the main deflection roller responding to the edge position of the film tube and the latter with its lateral side Control edges in the area of the dividing plates.

Eine derartige Folienüberziehvorrichtung ist nach der DE-OS-3 011 264.2 bekannt. Die Trennplatten finden hierbei oberhalb von den Folienschlauch zu den Klemmbacken fördernden Walzen Anwendung, so daß der Folienschlauch elektrostatisch entladen wird und nicht mehr zusammenkleben kann. Die Klemmbacken sind als jeweils zwei Paare einander gegenüberliegend angeordnet, so daß sie sich mit ihren am Folienschlauch anliegenden Flächen gegeneinander abzustützen vermögen. Sie sind, während sie sich aneinander abstützen, auch noch bezüglich ihrer einzelnen Klemmbacken gegeneinander verfahrbar, so daß dann der Folienschlauch zwischen die einander zugekehrten Quetschflächen jedes Klemmbackenpaares gelangt und schließlich in der Endlage der Klemmbacken festgeklemmt wird. Somit setzt die Anwendbarkeit der Klemmbacken einerseits einen hohen Reibungswiderstand zwischen ihnen und den anliegenden Flächen des Folienschlauches voraus, und andererseits muß der Folienschlauch mit seinen einander zugekehrten Flächen der Quetschfalten sehr gute Gleiteigenschaften besitzen. Die Gleiteigenschaften können durch entsprechende Beschichtungen hergestellt werden, jedoch ist es schwierig, sie auf die Bereiche der Quetschfalten zu begrenzen, so daß es oft auch im Bereich der beabsichtigten hohen Reibungswiderstände gegenüber den Klemmbacken zum unbeabsichtigten Gleiten kommt, wobei die Folie nicht mehr umfaßt wird. Voraussetzung ist dabei, daß die Kantenlage des Folienschlauches auf die Trennplatten ausgerichtet ist. Zu diesem Zweck sprechen die Sensoren auf die Kantenlage des Folienschlauches an und steuern letzteren in die vorgesehene Mittellage. Da sich die erwähnte Anordnung jedoch unmittelbar unterhalb der Hauptumlenkrolle befindet, können nur begrenzte Lageabweichungen im erwähnten Sinne erfaßt werden.Such a film covering device is known from DE-OS-3 011 264.2. The separating plates are used above the film tube to the jaws conveying rollers, so that the film tube is electrostatically discharged and can no longer stick together. The jaws are arranged as two pairs opposite each other, so that they are able to support each other with their surfaces lying against the film tube. They are, while they are supported against each other, still movable relative to each other with respect to their individual clamping jaws, so that the film tube then gets between the facing crushing surfaces of each pair of clamping jaws and is finally clamped in the end position of the clamping jaws. Thus, the applicability of the clamping jaws on the one hand presupposes a high frictional resistance between them and the adjacent surfaces of the film tube, and on the other hand the film tube with its mutually facing surfaces of the pinch folds must have very good sliding properties. The sliding properties can be produced by appropriate coatings, but it is difficult to limit them to the areas of the pinch folds, so that there is often inadvertent sliding even in the area of the intended high frictional resistance to the clamping jaws, the film no longer being encased. The prerequisite is that the edge position of the film tube is aligned with the separating plates. For this purpose, the sensors respond to the edge position of the film tube and control the latter into the intended central position. However, since the arrangement mentioned is located directly below the main deflection roller, only limited positional deviations can be detected in the sense mentioned.

Die Notwendigkeit, Gleitmittel auf die Folien aufzubringen, wird durch den Vorschlag nach der deutschen nicht vorveröffentlichten Patentanmeldung P-3 422 027.5 weitgehend behoben, indem hiernach die Blätter der Quetschfalten des Folienschlauches zwischen Klemmbacken und schulterartigen Abschnitten der Trennplatten fixiert werden, woraufhin die dabei gebildeten Falten von weiteren Klemmbacken gegen die zuerst bewegten Klemmbacken gepreßt werden. Unter Einschluß dieser Falten werden sodann die geschlossenen Klemmbackenpaare auseinandergefahren und spreizen dabei den Folienschlauch im erforderlichen Maße auf. Unbeeinflußt hiervon ist indes, daß Lageabweichungen des Folienschlauches nur begrenzt ausgeglichen werden, so daß der zuverlässige Angriff der Klemmbacken hierdurch beeinträchtigt ist. Hinzu kommt, daß mit Rücksicht auf die geforderte Sicherheit von den Klemmbacken verhältnismäßig breite Randzonen eingeklemmt gehalten werden müssen, die sich beim späteren vollständigen Aufspreizen mittels Spreizfingern nur noch erschwert voll spannen lassen, und daß der Folienschlauch schließlich mit einem größeren Umfang über den Gutstapel gezogen wird als erforderlich.The need to apply lubricant to the foils is largely eliminated by the proposal according to German unpublished patent application P-3 422 027.5, in which the leaves of the pinch folds of the foil tube are fixed between the jaws and shoulder-like sections of the separating plates, whereupon the folds formed in the process be pressed against the first moved jaws by further jaws. Including these folds, the closed pairs of jaws are then moved apart and thereby spread the film tube to the required extent. This is unaffected by the fact that positional deviations of the film tube are compensated for only to a limited extent, so that the reliable attack of the clamping jaws is thereby impaired. In addition, in view of the required safety, relatively wide marginal zones must be clamped in by the clamping jaws, which are difficult to fully clamp when fully expanded later by means of spreading fingers, and that the film tube is finally pulled over the stack of goods with a larger circumference than required.

Vom einleitend dargestellten Stand der Technik ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Weiterentwicklung dahingehend vorzunehmen, daß sowohl Lageabweichungen der zugeführten Folienschläuche als auch unmittelbare Maßabweichungen derselben in größerem Umfang als bislang zugelassen werden können, ohne daß dabei die Gefahr besteht, daß die Schlauchkanten von den Klemmbacken nicht hinreichend erfaßt werden. Dabei soll auch sichergestellt werden, daß nicht mehr Randbreite von den Klemmbacken erfaßt werden muß, als es unumgänglich erforderlich ist, so daß die Folienhaubenweitgehend maßgerecht über die gestapelten Güter geführt werden können. Die Folienhaube soll dabei auch mittels des Spreizfingers völlig straff gehalten werden. Zusätzlich soll die Anordnung dabei so getroffen sein, daß sie sich vor allem auch bei der für die Verarbeitung gleitmittelfreier Folienschläuche vorgesehenen Ausführungsform nach der deutschen Patentanmeldung P-3 422 027.5 anwenden läßt, nach welcher die Klemmbackenpaare eine Abstützung an den Trennplatten erfahren.Starting from the state of the art described in the introduction, the object of the invention is to make further developments such that both positional deviations of the supplied film tubes and direct dimensional deviations of the same can be permitted to a greater extent than previously without the risk that the tube edges of the jaws are not sufficiently grasped. It should also be ensured that no more edge width has to be grasped by the clamping jaws than is absolutely necessary, so that the film hoods can be guided over the stacked goods to a large extent. The film hood should also be kept completely taut using the spreading finger. In addition, the arrangement should be such that it can be used especially in the embodiment provided for the processing of lubricant-free film tubes according to German patent application P-3 422 027.5, according to which the pairs of jaws are supported on the separating plates.

Die Erfindung löst die Aufgabenstellung durch den Vorschlag gemäß dem Kennzeichnungsteil des Anspruchs 1, für den die Unteransprüche 2 bis 6 vorteilhafte Weiterentwicklungen vorsehen.The invention solves the problem by the proposal according to the characterizing part of claim 1, for which subclaims 2 to 6 provide advantageous further developments.

Die Verwendung des in vertikaler Richtung bewegbaren Einstellwagens ermöglicht es gemeinsam mit der Klemmeinrichtung, daß der Folienschlauch aus einer oberen Greifstellung bis in eine untere Stellung gefördert werden kann, in der die Klemmbacken auf den Folienschlauch einwirken. Dabei läuft der Folienschlauch über die Hauptumlenkrolle ab. Aus Gründen der Maß-und Lageabweichungen ist es unvermeidlich, daß der Folienschlauch hierbei mehr oder weniger verläuft. Dies ist auf die Länge einer einzelnen, im Anschluß an den Einstellwagen vorzunehmenden Abschneidung für eine Folienhaube noch nicht besonders störend, jedoch würde der Verlauf des Folienschlauches, wenn er nicht korrigiert wird, bei sich anschließenden Hauben beträchtlich stören. Die Erfindung ermöglicht nun bei geöffneter Klemmeinrichtung, während der Einstellwagen von unten nach oben zurückkehrt, eine Neueinstellung des Einstellwagens auf die Folienmitte, indem die von den Sensoren angezeigten Signale für die Steuerung der Horizontalbewegung des Einstellwagens verwendet werden. Die Horizontalbewegung muß daher im Ausmaß der Lageabweichungen sowie der Maßabweichungen des Folienschlauches sichergestellt sein. Sofern dann in der äußersten Höhenlage erneut unter ähnlichen Voraussetzungen eine wirkungsvolle Korrektur des Verlaufs des Folienschlauches vorgenommen wird, ist von Vorteil, daß dann ebenfalls eine größere Länge des Folienschlauches besteht, indem die Hilfsumlenkrolle in der äußersten Höhenlage des Einstellwagens die Hauptumlenkrolle überragt. Dadurch wird eine freie Folienbahn ohne Berührung mit der Hauptumlenkrolle geschaffen, die sich, ohne durch Reibung an der Hauptumlenkrolle beeinträchtigt zu sein, wirkungsvoll in ihrer Lage korrigieren läßt.The use of the adjusting carriage, which can be moved in the vertical direction, together with the clamping device, enables the film tube to be conveyed from an upper gripping position to a lower position, in which the clamping jaws act on the film tube. The film tube runs over the main deflection roller. For reasons of dimension and positional deviations, it is inevitable that the film tube runs more or less. This is not particularly troublesome in terms of the length of a single cut to be made after the insertion carriage for a film hood, but the course of the film tube, if it is not corrected, would considerably interfere with subsequent hoods. The invention now makes it possible, with the clamping device open, while the setting carriage is returning from the bottom upwards, to readjust the setting carriage to the center of the film, by using the signals displayed by the sensors for controlling the horizontal movement of the setting carriage. The horizontal movement must therefore be ensured to the extent of the positional deviations and the dimensional deviations of the film tube. If an effective correction of the course of the film tube is then again carried out in the outermost height position under similar conditions, it is advantageous that the film tube also has a greater length by the auxiliary deflection roller protruding from the main deflection roller in the outermost height position of the insertion carriage. This creates a free film web without contact with the main deflection roller, which can be effectively corrected in its position without being affected by friction on the main deflection roller.

Die erwähnten Vorgänge lassen sich in weiterer Ausgestaltung der Erfindung weitgehend in eine selbsttätige Steuerung einbeziehen. Diesem Zweck dient ein Signalgeber am Einstellwagen, der auf ortsfeste Schalter des Maschinenrahmens derart einwirkt, daß in der äußersten Höhenlage des Einstellwagens dessen Horizontalantrieb auf die Mittenlage der Hauptumlenkrollegesteuert wird. Der Unterschied bezüglich der Steuerung des in Vertikallage gespannten Folienschlauches gegenüber der letztgenannten Art der Steuerung besteht darin, daß im erstgenannten Fall die Lage des Folienschlauches von den Sensoren unmittelbar detektiert wird, wohingegen im zweiten Fall die Lage des Einstellwagens, die dann der Lage des Folienschlauches entspricht, mittels der ortsfesten Schalter und des darauf einwirkenden Signalgeber erfaßt wird.In a further embodiment of the invention, the processes mentioned can largely be incorporated into an automatic control. This purpose is served by a signal transmitter on the setting carriage, which acts on the stationary switches of the machine frame in such a way that the horizontal drive of the setting carriage is controlled at the center position of the main deflection roller in the extreme height position. The difference with regard to the control of the film tube stretched in vertical position compared to the latter type of control is that in the former case the position of the film tube is detected directly by the sensors, whereas in the second case the position of the trolley, which then corresponds to the position of the film tube , is detected by means of the stationary switch and the signal transmitter acting thereon.

Die Klemmeinrichtung ist während der letztgenannten Ausrichtung des Folienschlauches geschlossen. Zweckmäßig wird sie dadurch verwirklicht, daß Klemmbacken an den Trennplatten angepreßt werden.The clamping device is closed during the latter orientation of the film tube. It is expediently realized in that clamping jaws are pressed onto the separating plates.

Die beiden Ausrichtvorgänge des Folienschlauches lassen sich in wirkungsvoller Weise automatisch umschalten, wenn ein auf die äußerste Höhenlage des Einstellwagen ansprechender Schalter vorgesehen ist, der dann die Umsteuerung des Horizontalantriebes des Einstellwagens von den Sensoren auf die ortsfesten Schalter übernimmt.The two aligning processes of the film tube can be automatically and effectively switched over if a switch that responds to the outermost height of the insertion carriage is provided, which then takes over the reversal of the horizontal drive of the insertion carriage from the sensors to the stationary switches.

Noch weitere Möglichkeiten der Automatisierung für die Ausrichtung des Folienschlauches ergeben sich dadurch, daß die Steuerbarkeit des Horizontalantriebes des Einstellwagens mittels der Sensoren der Klemmeinrichtung durch Schaltmittel hergestellt wird, die auf die Phase zwischen der unteren Stellung und einer unterhalb der äußersten Höhenlage vorgesehenen oberen Stellung des Einstellwagens ansprechen. Hierbei kann es sich zweckmäßig um einen weiteren Schalter handeln.Still further possibilities of automation for the alignment of the film tube result from the fact that the controllability of the horizontal drive of the setting carriage is produced by means of the sensors of the clamping device by switching means which are based on the phase between the lower position and an upper position of the setting carriage provided below the outermost height position speak to. This can suitably be another switch.

Die vorgesehenen Schalter sind im wesentlichen bekannte Ausführungsformen, die weitgehend berührungsfrei betreibbar sind. Insbesondere finden als Sensoren Ultraschallköpfe Anwendung, die in konzentrischer Anordnung Geber und Empfänger aufweisen, und die auf schallreflektierende Flächen ansprechen. Die Randzonen der Folienschläuche reflektieren den Schall in zuverlässiger Weise.The switches provided are essentially known embodiments which can be operated largely without contact. In particular, ultrasound heads are used as sensors, which have transmitters and receivers in a concentric arrangement and which respond to sound-reflecting surfaces. The edge zones of the film tubes reliably reflect the sound.

Zur weiteren Veranschaulichung der Erfindung dienen die letztere schematisch darstellenden Zeichnungen, auf die nachstehend Bezug genommen wird. Darin zeigen, jeweils in seitlicher und vorderer, schematischer Ansicht:

  • Figur 1 die Lage des Einstellwagens in seiner Ausgangsstellung,
  • Figur 2 den abwärts fahrenden Einstellwagen,
  • Figur 3 den Einstellwagen in seiner unteren Stellung nach Übernahme des Folienschlauches durch die Klemmbacken,
  • Figur 4 den Einstellwagen in seiner oberen Stellung bei mittigem Verlauf des Folienschlauches,
  • Figur 5 den Einstellwagen in seiner oberen Stellung bei stark exzentrischem Verlauf des Folienschlauches,
  • Figur 6 den Einstellwagen in seiner äußersten Höhenlage vor Zentrierung des Folienschlauches und
  • Figur 7 den Einstellwagen in seiner äußersten Höhenlage.
To further illustrate the invention serve the latter schematically illustrative drawings, to which reference is made below. Therein show, in side and front, schematic view:
  • FIG. 1 shows the position of the trolley in its initial position,
  • FIG. 2 shows the downward-moving parking car,
  • FIG. 3 the setting carriage in its lower position after the film tube has been taken over by the clamping jaws,
  • FIG. 4 shows the setting carriage in its upper position with the film tube running centrally,
  • FIG. 5 shows the setting carriage in its upper position when the film tube is very eccentric,
  • Figure 6 shows the trolley in its extreme height before centering the film tube and
  • Figure 7 shows the car in its extreme elevation.

Entsprechend Figur 1 erkennt man den Einstellwagen 4 mit den fest zu beiden Seiten desselben angeordneten Trennplatten 1, die in die Quetschfalten des Folienschlauches 3 hineinragen. Oberhalb der Trennplatten 1 sind die auf die Kanten 15 des Folienschlauches 3 ausgerichteten Sensoren 2 am Einstellwagen 4 vorgesehen. Oberhalb dieser verläuft die Hilfsumlenkrolle 6. Bei der in Figur 1 wiedergegebenen Stellung des Einstellwagens, der in Richtung des Doppelpfeiles 16 vertikal beweglich ist, erkennt man die Hauptumlenkrolle 7. Mit den Trennplatten 1 arbeiten die mechanischen Klemmeinrichtungen 5 zusammen, bei denen es sich, wie vor allem die seitliche Darstellung der Figur 1 erkennen läßt, um Klemmbacken handeln kann, die mittels Betätigungszylindern gegen die Trennplatten 1 anpreßbar sind.According to FIG. 1, the setting carriage 4 can be seen with the separating plates 1 which are arranged firmly on both sides thereof and which protrude into the pinch folds of the film tube 3. Above the separating plates 1, the sensors 2, which are aligned with the edges 15 of the film tube 3, are provided on the setting carriage 4. The auxiliary deflection roller 6 runs above this. In the position of the trolley shown in FIG. 1, which can be moved vertically in the direction of the double arrow 16, the main deflection roller 7 can be seen. The mechanical clamping devices 5 work together with the separating plates 1, such as Above all, the side view of Figure 1 can be seen, can be clamping jaws that can be pressed against the partition plates 1 by means of actuating cylinders.

Unterhalb des Einstellwagens erkennt man noch die Klemmbackenpaare 8, welche entsprechend dem genannten Stand der Technik ausgebildet sein können.Below the trolley, one can still see the pairs of clamping jaws 8, which correspond to the prior art mentioned can be trained.

Der Einstellwagen 4 ist mittels Rollen 17 auf einem sich in horizontaler Richtung erstreckenden Schlitten 18 verfahrbar, indem zwischen letzterem und dem Einstellwagen 4 ein Horizontalantrieb 11 verläuft. Der Schlitten 18 ist seinerseits mittels Rollen 21 auf Schienen 20 geführt. Die Enden einer umlaufenden Kette 22 greifen am Schlitten 18 oben und unten an. Der Antriebsmotor 12 treibt über eine Getrieberad die Kette 22 im Ausmaß der jeweils vorgesehenen Vertikalbewegung des Einstellwagens 4 an. Die vorstehend bezeichnete Einrichtung für den horizontalen und vertikalen Antrieb des Einstellwagens 4 sind lediglich auf der linken Seite der Vorderansicht gemäß Figur 1 dargestellt. In entsprechender Anordnung befinden sie sich auch auf der rechten Seite des Einstellwagens 4. Auf der letztgenannten Seite erkennt man die Signalfahne 9, welche auf die beiden, nur der Figur 6 zu entnehmenden, ortsfesten Schalter 10 einwirkt. Sofern die Signalfahne 9 im Bereich beider ortsfester Schalter 10 steht, geht von letzteren kein Steuerimpuls für den Horizontalantrieb 11 aus. Wenn jedoch nur einer der ortsfesten Schalter 10 im Einflußbereich der Signalfahne 9 steht, wird der Horizontalantrieb 11 derart eingeschaltet, daß die Signalfahne 9 wieder auf beide ortsfeste Schalter 10 einwirkt.The setting carriage 4 can be moved by means of rollers 17 on a carriage 18 extending in the horizontal direction, in that a horizontal drive 11 runs between the latter and the setting carriage 4. The carriage 18 is in turn guided on rails 20 by means of rollers 21. The ends of a revolving chain 22 engage the carriage 18 at the top and bottom. The drive motor 12 drives the chain 22 via a gear wheel to the extent of the vertical movement of the trolley 4 that is provided in each case. The device described above for the horizontal and vertical drive of the insertion carriage 4 are only shown on the left side of the front view according to FIG. 1. In a corresponding arrangement, they are also located on the right side of the setting carriage 4. On the latter side, the signal flag 9 can be seen, which acts on the two fixed switches 10, which can only be seen in FIG. 6. If the signal flag 9 is in the area of both fixed switches 10, no control impulse for the horizontal drive 11 is emitted by the latter. However, if only one of the fixed switches 10 is in the area of influence of the signal flag 9, the horizontal drive 11 is switched on in such a way that the signal flag 9 acts on both fixed switches 10 again.

Zur Feststellung der obersten Höhenlage, die der Einstellwagen 13 annehmen kann, dient der hierauf ansprechende Schalter 13. Ein am Wagen 4 angebrachter weiterer Schalter 14 wirkt mit einer Leiste 23 zusammen, die im Abstand zwischen der unteren Stellung und der oberen Stellung des Einstellwagens entspricht. Somit kann die Phase geschaltet werden, innerhalb welcher die Sensoren 2 den Horizontalantrieb 11 zwecks Ausrichtung des Folienschlauchverlaufs steuern.The switch 13, which is responsive to this, is used to determine the uppermost altitude, which the adjusting carriage 13 can assume. A further switch 14 attached to the carriage 4 interacts with a bar 23, which corresponds to the distance between the lower position and the upper position of the insertion carriage. Thus, the phase can be switched within which the sensors 2 control the horizontal drive 11 for the purpose of aligning the film tube course.

Während Figur 1 die Ausgangsstellung des Einstellwagens 4 wiedergibt, in welchem die zeichnerisch nicht dargestellte Trenn- und Schweißvorrichtung entsprechend der strichpunktierten Linie 24 einen Schnitt durchgeführt hat, ist der Einstellwagen 4 gemäß Figur 2 durch die geöffnete Trenn- und Schweißeinrichtung hindurch nach unten verfahren worden wobei die Klemmeinrichtung 5 geschlossen ist. Aus dieser Stellung übernehmen die Klemmbacken 8 gemäß Figur 3 die unteren Randkante des Folienschlauches, so daß dann die Klemmeinrichtung 5 geöffnet werden kann. Sowie dies geschieht, ist die Steuerung in der Horizontalverstellung 11 mittels der Sensoren 15 zwecks Ausrichtung des Folienschlauches frei. Figur 4 zeigt demgemäß einen bei geöffneter Klemmeinrichtung 5 hochgefahrenen Einstellwagen 4, der dabei in Richtung des Doppelpfeiles 25 beweglich ist. In Bezug auf die Hauptumlenkrolle 7 kann sich dabei eine seitliche Verschiebung ergeben, wie dies Figur 5 bei bereits wieder geschlossener Klemmeinrichtung 5 veranschaulicht.While FIG. 1 shows the starting position of the setting carriage 4, in which the cutting and welding device, not shown in the drawing, has made a cut according to the dash-dotted line 24, the setting carriage 4 according to FIG. 2 has been moved downward through the opened separating and welding device the clamping device 5 is closed. From this position, the clamping jaws 8 take over the lower edge of the film tube according to FIG. 3, so that the clamping device 5 can then be opened. As soon as this happens, the control in the horizontal adjustment 11 by means of the sensors 15 is free for the purpose of aligning the film tube. FIG. 4 accordingly shows a setting carriage 4 which is raised when the clamping device 5 is open and which can be moved in the direction of the double arrow 25. With respect to the main deflection roller 7, a lateral displacement can result, as illustrated in FIG. 5 with the clamping device 5 already closed again.

Die aus der oberen Stellung in die höchste Stellung überführte Lage des Einstellwagens 4 ergibt sich aus Figur 6 in der Seitenansicht. Die obere Umlenkrolle 7 ist dabei überdeckt, so daß der Folienschlauch 3 auf größerer Länge berührungsfrei gehalten ist. Der Einstellwagen 4 befindet sich dabei zunächst noch in der nach rechts verschobenen Stellung, in welcher die Signalfahne 9 nur auf eine der beiden ortsfesten Schalter 10 einwirkt.The position of the trolley 4 which has been transferred from the upper position to the highest position is shown in FIG. 6 in a side view. The upper deflection roller 7 is covered, so that the film tube 3 is kept contact-free over a longer length. The trolley 4 is initially still in the position shifted to the right, in which the signal flag 9 acts only on one of the two fixed switches 10.

Gemäß Figur 7 kommt es aus dieser Stellung zu einer Verschiebung des Einstellwagens in Richtung des Pfeiles 26, bis die Signalfahne 9 wieder auf beide ortsfeste Schalter 10 einwirkt. Die Klemmeinrichtung bleibt hierbei in der Schließlage. Aus dieser Stellung kehrt der Einstellwagen 4 abschließend wieder in seine Ausgangslage zurück, wie sie Figur 1 darstellt.According to FIG. 7, the setting carriage moves from this position in the direction of arrow 26 until the signal flag 9 acts on both stationary switches 10 again. The clamping device remains in the closed position. From this position, the setting carriage 4 finally returns to its starting position, as shown in FIG. 1.

Claims (6)

1. A device for wrapping articles by pulling a plastic film tubing (3) over said articles, especially over goods stapled on pallets, with the film tubing (3) laterally pleated inwards being fed via an upper main reflecting roller (7) followed by separating blades (1) inserted into the lateral pleats from both sides, the film tubing (3) being gripped, spread and pulled over the articles by clamping jaws (8) provided on vertically movable slides (18) in pairs in opposition close to both edges of the film tubing (3) the edge position of which is monitored by sensors (2) placed between the separating blades (1) and the main deflecting roller (3), said sensors (2) directing the lateral edges of the film tubing into the area of the separating blades (1),
characterized by
the separating blades (1) and the sensors (2) being arranged on a vertically movable adjustment carriage (4) movable horizontally to the extent of the deviations of the film tubing (3), and supporting a clamping device (5) effective to the film tubing (3) alternative, and supporting an upper assisting deflecting roller (6) which overtops the main deflecting roller (7) in the uppermost position of the adjustment carriage (4) that is movable downwards into the zone of the clamping jaws (8).
2. A device as claimed in claim 1, wherin the adjustment carriage (4) is provided with a signal emitter (9) effective to stationary switches (10) controlling a horizontal drive (11) of the adjustment carriage (4) in its uppermost position so that the adjustment carriage (4) is in its mean position relative to the main deflectingroller (7).
3. A device as claimed in the claims 1 and 2, wherein,
the clamping device (5) comprises clamping jaws (8) capable of being urged towards the separating plates (1).
4. A device as claimed in the claims 1 to 3, comprising,
a further switch (13) responsive to the uppermost position (Figur 6) of the adjustment carriage (4) by which switch (13) the control of the horizontal drive (11) in the uppermost position of the adjustment carriage (4) is reversable from the sensors (2) to the stationary switches (10).
5. A device as claimed in the claims 1 to 4, wherein,
the horizontal drive (11) of the adjustment carriage (4) is capable of being controlled by the sensors (3) in an upper position (Figur 4) of the adjustment carriage (4) with the opened clamping device (3) being within the phase between the lower position (Figur 3) and an upper position below its uppermost position (Figur 7).
6. A device as claimed in claim 5,
characterized by
a switch (14) detecting said phase between said lower and said upper position for switching on the control effected by the sensors (2).
EP86104330A 1985-04-04 1986-03-28 Sheathing device Expired EP0198301B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86104330T ATE34350T1 (en) 1985-04-04 1986-03-28 FOIL APPLICATION DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853512471 DE3512471A1 (en) 1985-04-04 1985-04-04 FILM COVER
DE3512471 1985-04-04

Publications (2)

Publication Number Publication Date
EP0198301A1 EP0198301A1 (en) 1986-10-22
EP0198301B1 true EP0198301B1 (en) 1988-05-18

Family

ID=6267387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86104330A Expired EP0198301B1 (en) 1985-04-04 1986-03-28 Sheathing device

Country Status (3)

Country Link
EP (1) EP0198301B1 (en)
AT (1) ATE34350T1 (en)
DE (2) DE3512471A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9006384U1 (en) * 1990-06-06 1990-08-09 Bernhard Beumer Maschinenfabrik Kg, 4720 Beckum, De
DE4038416A1 (en) * 1990-12-01 1992-06-04 Nuetro Maschinen & Anlagen Packing equipment covering item with flexible hood - uses guide rollers located in swivelable frame between cover roller and deflection roller

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3011264A1 (en) * 1980-03-24 1981-10-01 Ing. Paul Joosten Verpackungstechnik, 4180 Goch FILM COVER

Also Published As

Publication number Publication date
EP0198301A1 (en) 1986-10-22
DE3660201D1 (en) 1988-06-23
DE3512471A1 (en) 1986-10-09
ATE34350T1 (en) 1988-06-15

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