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EP0294321B1 - Device for the selective feeding of one of two webs of enveloping material to a packaging machine - Google Patents

Device for the selective feeding of one of two webs of enveloping material to a packaging machine Download PDF

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Publication number
EP0294321B1
EP0294321B1 EP19880810178 EP88810178A EP0294321B1 EP 0294321 B1 EP0294321 B1 EP 0294321B1 EP 19880810178 EP19880810178 EP 19880810178 EP 88810178 A EP88810178 A EP 88810178A EP 0294321 B1 EP0294321 B1 EP 0294321B1
Authority
EP
European Patent Office
Prior art keywords
holder
sheet
sheets
conveyed
segments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19880810178
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German (de)
French (fr)
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EP0294321A2 (en
EP0294321A3 (en
Inventor
Theo Walz
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.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
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Publication date
Application filed by Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Publication of EP0294321A2 publication Critical patent/EP0294321A2/en
Publication of EP0294321A3 publication Critical patent/EP0294321A3/en
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Publication of EP0294321B1 publication Critical patent/EP0294321B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/14—Feeding webs from rolls by grippers

Definitions

  • a device according to the preamble of claim 1 is known from Research Disclosure, volume 146, June 1976, pages 23-24, ref. 14626.
  • This document describes a reel changer with two supply rolls with wrapping material webs.
  • the two tracks are each guided via a memory and a guide track to a common holder, in which the two tracks are guided via converging guide channels to a common outlet slot of the holder, which only one track projects over.
  • There it is drawn off intermittently by a pull-off device using a cutting knife.
  • Upstream of the holder each web is guided over a separate, freely rotatable roller.
  • a feed element in the form of a roller with two circular cylinder segments offset from one another by 180 ° is rotatably mounted between the two rollers. When a supply roll is used up, the feed element is turned through 180 °. The two circular cylinder segments press against one of the rollers, so that the previously advanced path is pulled back and the other path is advanced.
  • This known device is probably suitable for automatic switching at the end of the tape supply.
  • it is not suitable if e.g.
  • the wrapping material webs have to be pulled off alternately or alternately from two supply rolls, because when one web is withdrawn, it is immediately threaded out, on the one hand by the weight of the web in the store, and on the other hand by the inertia of the roller, which continues to rotate after the switching movement in the retracting sense.
  • the present invention has for its object to develop a device of the type mentioned in such a way that it also e.g. is suitable for changing formats without the retracted web inevitably coming out. This object is achieved by the characterizing features of claim 1.
  • a device for feeding wrapping material sections to a packaging machine, which, however, has to be shut down for the roll change, is known from GB-PS 2025373.
  • a brake is connected downstream of the memory.
  • the device shown comprises two supply rolls 1, 2, from each of which a wrapping material web, for example a film 3, 4, is pulled off.
  • the foils 3, 4 are each one Storage 5, 6 and a guide track 7, 8 each led to a holder 9.
  • the accumulators 5, 6 enable the films 3, 4 to be withdrawn in cycles and consist of two stationary, rotatable rollers 15 and a roller 17 tensioned by a spring 16, which is wrapped in a loop by the relevant film 3, 4.
  • the guideways 7, 8 are formed by a central plate 18 and a curved plate 19 each. The lower part of the plate 19 runs parallel to the middle plate 18 and forms with it a guide channel 20 for the film 3, 4.
  • the holder 9 consists of a wedge 21 and two plates 22 arranged parallel to the wedge surfaces and rigidly connected to the wedge 21. Two further guide channels 23 aligned with the channels 20 are formed between the wedge 21 and the plates 22. These converge downward and open into a common exit slot 24.
  • the holder 9 can be pivoted about a horizontal axis 25 between the basic position shown in solid lines, in which the free end 26 of the film 3 protruding from the slot 24 is adjacent to a fixed knife 30 of a separating device 31 and a dashed end position, in which the end 26 is in the path of a movable gripper 35 of a trigger device 36.
  • the drives 37, 38, 33 of the gripper 35, the holder 9 and a movable knife 32 which are only shown schematically, are coupled to one another, for example via cam disks on a common camshaft, and are moved in time with a downstream packaging machine, not shown.
  • a brake 45, 46 designed as a spring-loaded pivot lever 44.
  • the lever 44 forms an acute angle with the plate 19 and acts as a backstop as well as a brake.
  • the brakes 45, 46 can be released by means of a pneumatic cylinder 47, in that the lever 44 is pivoted away from the plate 19.
  • a blocking plunger 51 which is actuated by a pneumatic cylinder 50, engages in the guide channels 20 and penetrates an opening 52 in the plate 19 in the switched-on state and presses the film 3 or 4 against the central plate.
  • a feed element 57, 58 is arranged on both sides in the form of a cylinder segment 60 which can be pivoted about an axis 59.
  • the two pivot axes 59 are parallel to one another and symmetrical to the central plane of the plate 18.
  • a roller 61 is mounted freely rotatably in the plate 18 centrally between the axes 59.
  • the periphery 62 of the segments 60 carries an elastomeric coating 63. When the segments 60 pivot, they take the foils 3, 4 with them between the periphery 62 and the rotating roller 61. However, the frictional connection between the periphery 62 and the film 3, 4 is smaller than the braking effect of the brakes 45, 46.
  • a gearwheel 70 is fastened on each of the two axes 59. The two gears 70 mesh with one Another gear 71, which can be pivoted between two end positions by means of a pneumatic cylinder 72.
  • the device described works as follows: In the position shown in FIG. 1, the film 3 of the supply roll 1 is stretched tightly over the plate 19 of the guideway 7 and its end 26 protrudes from the slot 24.
  • the holder 9 swings cyclically into the Position shown in broken lines, where the end 26 is gripped and pulled by the gripper 35.
  • a film section is cut off with the separating device 31.
  • the film 4 is threaded in from the full spare roll 2, i.e. inserted into the guideway 8 via the memory 6 and the brake 46.
  • a mark 81 is attached to the edge of the film 4, which when threading was made to coincide with a tear 82 on the upper, inclined part of the plate 19.
  • the film 4 is loosely inserted into the guide track 8 and the guide channel 23, so that it forms a loop 83 and its end does not protrude beyond the slot 24.
  • the loop 83 is dimensioned such that the distance of the free end of the film 4 from the knife 30 is shorter than the length of the periphery 62 of the segment 60 measured in the circumferential direction. The film 4 is held in this position by the plunger 51.
  • the pneumatics switches cylinder 72 um, so that the segments 60 move from the position shown in FIG. 1 to the position shown in FIG. 2.
  • the end 26 of the film 3 is pulled back through the slot 24 and the end of the film 4 is pushed out of the slot 24, so that the end of the next cycle Foil 4 is gripped by the gripper 35 and pulled off.
  • the loop 83 is tightened. Because of the aligned mark 81, the front edge of the film 4 is exactly at the height of the knife 30, so that, in contrast to previously known solutions, for example those according to US Pat Roll 1, 2 no incorrectly packaged products have to be eliminated.
  • the loop 83 of the film 4 is merely pulled tight during the switching process without the mark 81 slipping relative to the crack 82.
  • the length of the loop 83 therefore only needs to be set approximately.
  • the brake 45 of the outflowing film 3 is released at the same time by means of the associated pneumatic cylinder 47.
  • the spring 16 therefore pulls the rest of the film 3 out of the guideway 7.
  • the empty roll 1 can now be exchanged for a new roll and the film back in be threaded into the guideway 7 in the manner described.
  • the switching process from one film 3 to the other film 4 is linked to the cycle of the gripper 35, in that the cylinder 72 does not move until the gripper 35 has reached its lower end position.
  • the device described is also suitable for the automatic, uninterrupted format change, with a new roll with a film of the width of the new format being introduced on the side that is not in operation at the moment before the change.
  • the format change can be carried out depending on the length of the products delivered to the packaging machine, in that the appropriate film width is pushed in and the other is pulled back. In this operating mode, the brake 45 or 46 assigned to the retracted film 3 or 4 is not released.
  • a plurality of segments 60 can be fastened on a common pivot axis 59, the roller 61 being subdivided accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Description

Eine Vorrichtung gemäss Oberbegriff des Anspruchs 1 ist aus der Research Disclosure, Band 146, Juni 1976, Seiten 23-24, Ref. 14626 bekannt. Diese Schrift beschreibt einen Bobinenwechsler mit zwei Vorratsrollen mit Einschlagmaterialbahnen. Die beiden Bahnen sind über je einen Speicher und je eine Führungsbahn zu einem gemeinsamen Halter geführt, in welchem die beiden Bahnen über konvergierende Führungskanäle zu einem gemeinsamen Austrittsschlitz des Halters geführt sind, den lediglich die eine Bahn überragt. Sie wird dort durch eine Abzugeinrichtung intermittierend über Trennmesser abgezogen. Stromaufwärts des Halters ist jede Bahn über eine separate, frei drehbare Walze geführt. Zwischen den beiden Walzen ist ein Vorschubelement in Form einer Rolle mit zwei um 180° zueinander versetzten Kreiszylindersegmenten drehbar gelagert. Wenn eine Vorratsrolle aufgebraucht ist, wird das Vorschubelement um 180° gedreht. Dabei drücken die beiden Kreiszylindersegmente gegen je eine der Walzen, so dass gleichzeitig die bisher vorgeschobene Bahn zurückgezogen und die andere Bahn vorgeschoben wird.A device according to the preamble of claim 1 is known from Research Disclosure, volume 146, June 1976, pages 23-24, ref. 14626. This document describes a reel changer with two supply rolls with wrapping material webs. The two tracks are each guided via a memory and a guide track to a common holder, in which the two tracks are guided via converging guide channels to a common outlet slot of the holder, which only one track projects over. There it is drawn off intermittently by a pull-off device using a cutting knife. Upstream of the holder, each web is guided over a separate, freely rotatable roller. A feed element in the form of a roller with two circular cylinder segments offset from one another by 180 ° is rotatably mounted between the two rollers. When a supply roll is used up, the feed element is turned through 180 °. The two circular cylinder segments press against one of the rollers, so that the previously advanced path is pulled back and the other path is advanced.

Diese bekannte Vorrichtung eignet sich wohl zum automatischen Umschalten beim Ende des Bandvorrats. Sie ist jedoch nicht geeignet, wenn z.B. von zwei Vorratsrollen wahlweise oder abwechselnd die Einschlagmaterialbahnen abgezogen werden müssen, weil beim Rückzug der einen Bahn diese gleich noch ausgefädelt wird, einerseits durch das Gewicht der Bahn im Speicher, andererseits durch die Trägheit der Walze, die nach der Schaltbewegung im rückziehenden Sinne weiterdreht.This known device is probably suitable for automatic switching at the end of the tape supply. However, it is not suitable if e.g. The wrapping material webs have to be pulled off alternately or alternately from two supply rolls, because when one web is withdrawn, it is immediately threaded out, on the one hand by the weight of the web in the store, and on the other hand by the inertia of the roller, which continues to rotate after the switching movement in the retracting sense.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art derart weiterzubilden, dass sie auch z.B. für den Formatwechsel geeignet ist, ohne dass die zurückgezogene Bahn zwangsläufig ausfädelt. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The present invention has for its object to develop a device of the type mentioned in such a way that it also e.g. is suitable for changing formats without the retracted web inevitably coming out. This object is achieved by the characterizing features of claim 1.

Eine Vorrichtung zum Zuführen von Einschlagmaterialabschnitten zu einer Verpackungsmaschine, die allerdings zum Rollenwechsel stillgelegt werden muss, ist aus der GB-PS 2025373 bekannt. Bei dieser Vorrichtung ist dem Speicher eine Bremse nachgeschaltet.A device for feeding wrapping material sections to a packaging machine, which, however, has to be shut down for the roll change, is known from GB-PS 2025373. In this device, a brake is connected downstream of the memory.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Darin zeigt:

Fig. 1
einen schematischen Querschnitt durch eine erfindungsgemässe Vorrichtung, und
Fig. 2
ein Detail der Darstellung nach Fig. 1 im vergrösserten Massstab.

An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
Fig. 1
a schematic cross section through an inventive device, and
Fig. 2
a detail of the illustration of FIG. 1 on an enlarged scale.

Die dargestellte Vorrichtung umfasst zwei Vorratsrollen 1, 2, von denen je eine Einschlagmaterialbahn, z.B. eine Folie 3, 4 abgezogen wird. Die Folien 3, 4 sind über je einen Speicher 5, 6 und je eine Führungsbahn 7, 8 zu einem Halter 9 geführt. Die Speicher 5, 6 ermöglichen den taktweisen Abzug der Folien 3, 4 und bestehen aus zwei ortsfest angeordneten, drehbaren Walzen 15 und einer durch eine Feder 16 gespannten Walze 17, welche durch die betreffende Folie 3, 4 in einer Schlaufe umschlungen wird. Die Führungsbahnen 7, 8 werden durch eine Mittelplatte 18 und je eine gebogene Platte 19 gebildet. Der untere Teil der Platte 19 verläuft parallel zur Mittelplatte 18 und bildet mit dieser einen Führungskanal 20 für die Folie 3, 4. Der Halter 9 besteht aus einem Keil 21 und zwei parallel zu den Keilflächen angeordneten, mit dem Keil 21 starr verbundenen Platten 22. Zwischen dem Keil 21 und den Platten 22 sind zwei weitere, mit den Kanälen 20 fluchtende Führungskanäle 23 gebildet. Diese konvergieren nach unten und münden in einem gemeinsamen Austrittsschlitz 24. Der Halter 9 ist um eine horizontale Achse 25 schwenkbar zwischen der ausgezogen dargestellten Grundstellung, in welcher das aus dem Schlitz 24 herausragende freie Ende 26 der Folie 3 benachbart einem feststehenden Messer 30 einer Trenneinrichtung 31 ist, und einer gestrichelt angedeuteten Endstellung, in welcher das Ende 26 in der Bahn eines beweglichen Greifers 35 einer Abzugeinrichtung 36 ist. Die nur schematisch dargestellten Antriebe 37, 38, 33 des Greifers 35, des Halters 9 und eines beweglichen Messers 32 sind miteinander gekuppelt, z.B. über Kurvenscheiben auf einer gemeinsamen Nockenwelle, und werden im Takt mit einer nachgeschalteten, nicht dargestellten Verpackungsmaschine bewegt.The device shown comprises two supply rolls 1, 2, from each of which a wrapping material web, for example a film 3, 4, is pulled off. The foils 3, 4 are each one Storage 5, 6 and a guide track 7, 8 each led to a holder 9. The accumulators 5, 6 enable the films 3, 4 to be withdrawn in cycles and consist of two stationary, rotatable rollers 15 and a roller 17 tensioned by a spring 16, which is wrapped in a loop by the relevant film 3, 4. The guideways 7, 8 are formed by a central plate 18 and a curved plate 19 each. The lower part of the plate 19 runs parallel to the middle plate 18 and forms with it a guide channel 20 for the film 3, 4. The holder 9 consists of a wedge 21 and two plates 22 arranged parallel to the wedge surfaces and rigidly connected to the wedge 21. Two further guide channels 23 aligned with the channels 20 are formed between the wedge 21 and the plates 22. These converge downward and open into a common exit slot 24. The holder 9 can be pivoted about a horizontal axis 25 between the basic position shown in solid lines, in which the free end 26 of the film 3 protruding from the slot 24 is adjacent to a fixed knife 30 of a separating device 31 and a dashed end position, in which the end 26 is in the path of a movable gripper 35 of a trigger device 36. The drives 37, 38, 33 of the gripper 35, the holder 9 and a movable knife 32, which are only shown schematically, are coupled to one another, for example via cam disks on a common camshaft, and are moved in time with a downstream packaging machine, not shown.

Gegen den geneigten oberen Teil der Platte 19 liegt je eine als federbelasteter Schwenkhebel 44 ausgebildete Bremse 45, 46 an. Der Hebel 44 bildet mit der Platte 19 einen spitzen Winkel und wirkt ausser als Bremse noch als Rücklaufsperre. Die Bremsen 45, 46 können mittels je eines Pneumatikzylinders 47 gelöst werden, indem der Hebel 44 von der Platte 19 weggeschwenkt wird.Against the inclined upper part of the plate 19 there is a brake 45, 46 designed as a spring-loaded pivot lever 44. The lever 44 forms an acute angle with the plate 19 and acts as a backstop as well as a brake. The brakes 45, 46 can be released by means of a pneumatic cylinder 47, in that the lever 44 is pivoted away from the plate 19.

In die Führungskanäle 20 greift je ein durch einen Pneumatikzylinder 50 betätigter Blockierstössel 51 ein, der im eingeschalteten Zustand eine Oeffnung 52 in der Platte 19 durchdringt und die Folie 3 bzw. 4 gegen die Mittelplatte anpresst.A blocking plunger 51, which is actuated by a pneumatic cylinder 50, engages in the guide channels 20 and penetrates an opening 52 in the plate 19 in the switched-on state and presses the film 3 or 4 against the central plate.

Zwischen den Stösseln 51 und dem Halter 9 ist beidseits je ein Vorschubelement 57, 58 in Form je eines um eine Achse 59 schwenkbaren Zylindersegmentes 60 angeordnet. Die beiden Schwenkachsen 59 sind parallel zueinander und symmetrisch zur Mittelebene der Platte 18. Mittig zwischen den Achsen 59 ist eine Walze 61 frei drehbar in der Platte 18 gelagert. Die Peripherie 62 der Segmente 60 trägt eine elastomere Beschichtung 63. Wenn die Segmente 60 verschwenken, nehmen sie zwischen der Peripherie 62 und der mitdrehenden Walze 61 die Folien 3, 4 mit. Der Reibschluss zwischen Peripherie 62 und Folie 3, 4 ist jedoch geringer bemessen als die Bremswirkung der Bremsen 45, 46. Auf den beiden Achsen 59 ist je ein Zahnrad 70 befestigt. Die beiden Zahnräder 70 kämmen mit einem weiteren Zahnrad 71, welches mittels eines Pneumatikzylinders 72 zwischen zwei Endstellungen verschwenkbar ist.Between the plungers 51 and the holder 9, a feed element 57, 58 is arranged on both sides in the form of a cylinder segment 60 which can be pivoted about an axis 59. The two pivot axes 59 are parallel to one another and symmetrical to the central plane of the plate 18. A roller 61 is mounted freely rotatably in the plate 18 centrally between the axes 59. The periphery 62 of the segments 60 carries an elastomeric coating 63. When the segments 60 pivot, they take the foils 3, 4 with them between the periphery 62 and the rotating roller 61. However, the frictional connection between the periphery 62 and the film 3, 4 is smaller than the braking effect of the brakes 45, 46. A gearwheel 70 is fastened on each of the two axes 59. The two gears 70 mesh with one Another gear 71, which can be pivoted between two end positions by means of a pneumatic cylinder 72.

Im Betrieb arbeitet die beschriebene Vorrichtung wie folgt: Bei der in Fig. 1 dargestellten Stellung ist die Folie 3 der Vorratsrolle 1 straff über die Platte 19 der Führungsbahn 7 gespannt und ihr Ende 26 ragt aus dem Schlitz 24. Der Halter 9 schwenkt zyklisch in die strichliert dargestellte Stellung, wo das Ende 26 vom Greifer 35 ergriffen und abgezogen wird. Mit der Trenneinrichtung 31 wird jeweils ein Folienabschnitt abgetrennt. Von der vollen Reserverolle 2 ist die Folie 4 eingefädelt, d.h. über den Speicher 6 und die Bremse 46 in die Führungsbahn 8 eingeführt. In einem bestimmten Abstand vom Folienende ist am Rand der Folie 4 eine Marke 81 angebracht, die beim Einfädeln mit einem Riss 82 am oberen, geneigten Teil der Platte 19 in Deckung gebracht wurde. Nach der Bremse 46 ist die Folie 4 in die Führungsbahn 8 und den Führungskanal 23 lose eingesteckt, so dass sie eine Schlaufe 83 bildet und ihr Ende den Schlitz 24 nicht überragt. Die Schlaufe 83 ist jedoch so bemessen, dass die Distanz des freien Endes der Folie 4 vom Messer 30 kürzer ist als die in Umfangsrichtung gemessene Länge der Peripherie 62 des Segmentes 60. Die Folie 4 wird in dieser Lage durch den Stössel 51 festgehalten.In operation, the device described works as follows: In the position shown in FIG. 1, the film 3 of the supply roll 1 is stretched tightly over the plate 19 of the guideway 7 and its end 26 protrudes from the slot 24. The holder 9 swings cyclically into the Position shown in broken lines, where the end 26 is gripped and pulled by the gripper 35. A film section is cut off with the separating device 31. The film 4 is threaded in from the full spare roll 2, i.e. inserted into the guideway 8 via the memory 6 and the brake 46. At a certain distance from the end of the film, a mark 81 is attached to the edge of the film 4, which when threading was made to coincide with a tear 82 on the upper, inclined part of the plate 19. After the brake 46, the film 4 is loosely inserted into the guide track 8 and the guide channel 23, so that it forms a loop 83 and its end does not protrude beyond the slot 24. However, the loop 83 is dimensioned such that the distance of the free end of the film 4 from the knife 30 is shorter than the length of the periphery 62 of the segment 60 measured in the circumferential direction. The film 4 is held in this position by the plunger 51.

Wenn nun der Vorrat der Rolle 1 zur Neige geht, was durch einen Fühler 85 festgestellt wird, schaltet der Pneumatik zylinder 72 um, so dass die Segmente 60 aus der in Fig. 1 dargestellten in die in Fig. 2 gezeigte Lage gelangen. Durch das Abrollen der Peripherie 62 auf den über die Walze 61 geführten Folien 3, 4 wird dabei das Ende 26 der Folie 3 durch den Schlitz 24 zurückgezogen und das Ende der Folie 4 aus dem Schlitz 24 ausgeschoben, so dass beim nächsten Takt das Ende der Folie 4 durch den Greifer 35 ergriffen und abgezogen wird. Beim Umschalten wird die Schlaufe 83 gestrafft. Wegen der ausgerichteten Marke 81 ist der vordere Rand der Folie 4 genau auf der Höhe des Messers 30, so dass im Gegensatz zu vorbekannten Lösungen, z.B. jene gemäss US-PS 4541221, in welchen die Folienenden aneinandergeklebt werden, beim Uebergang von der einen zur andern Rolle 1, 2 keine unkorrekt verpackten Produkte ausgeschieden werden müssen. Weil der Reibungswiderstand der Peripherie 62 auf der Folie 4 geringer ist als der Reibungswiderstand der Bremse 46, wird die Schlaufe 83 der Folie 4 beim Umschaltvorgang bloss straff gezogen, ohne dass die Marke 81 relativ zum Riss 82 verrutscht. Die Länge der Schlaufe 83 braucht deshalb bloss ungefähr eingestellt zu werden.When the supply of roll 1 runs out, which is determined by a sensor 85, the pneumatics switches cylinder 72 um, so that the segments 60 move from the position shown in FIG. 1 to the position shown in FIG. 2. By rolling the periphery 62 on the films 3, 4 guided over the roller 61, the end 26 of the film 3 is pulled back through the slot 24 and the end of the film 4 is pushed out of the slot 24, so that the end of the next cycle Foil 4 is gripped by the gripper 35 and pulled off. When switching over, the loop 83 is tightened. Because of the aligned mark 81, the front edge of the film 4 is exactly at the height of the knife 30, so that, in contrast to previously known solutions, for example those according to US Pat Roll 1, 2 no incorrectly packaged products have to be eliminated. Because the frictional resistance of the periphery 62 on the film 4 is less than the frictional resistance of the brake 46, the loop 83 of the film 4 is merely pulled tight during the switching process without the mark 81 slipping relative to the crack 82. The length of the loop 83 therefore only needs to be set approximately.

Beim Umschaltvorgang löst gleichzeitig die Bremse 45 der auslaufenden Folie 3 mittels des zugehörigen Pneumatikzylinders 47. Die Feder 16 zieht daher den Rest der Folie 3 aus der Führungsbahn 7 zurück. Die leere Rolle 1 kann nun gegen eine neue Rolle ausgetauscht und die Folie wieder in der beschriebenen Weise in die Führungsbahn 7 eingefädelt werden. Der Umschaltvorgang von einer Folie 3 zur andern Folie 4 ist mit dem Takt des Greifers 35 verknüpft, indem die Bewegung des Zylinders 72 erst erfolgt, wenn der Greifer 35 seine untere Endlage erreicht hat.During the switching process, the brake 45 of the outflowing film 3 is released at the same time by means of the associated pneumatic cylinder 47. The spring 16 therefore pulls the rest of the film 3 out of the guideway 7. The empty roll 1 can now be exchanged for a new roll and the film back in be threaded into the guideway 7 in the manner described. The switching process from one film 3 to the other film 4 is linked to the cycle of the gripper 35, in that the cylinder 72 does not move until the gripper 35 has reached its lower end position.

Die beschriebene Vorrichtung eignet sich auch für den automatischen, unterbruchslosen Formatwechsel, wobei vor dem Wechsel eine neue Rolle mit einer Folie der Breite des neuen Formates an der im Moment nicht in Betrieb stehenden Seite eingeführt wird. Der Formatwechsel kann abhängig von der Länge der der Verpackungsmaschine angelieferten Produkte durchgeführt werden, indem jeweils die passende Folienbreite vorgeschoben und die andere zurückgezogen wird. Bei dieser Betriebsart wird jeweils die der zurückgezogenen Folie 3 bzw. 4 zugeordnete Bremse 45 bzw. 46 nicht gelöst.The device described is also suitable for the automatic, uninterrupted format change, with a new roll with a film of the width of the new format being introduced on the side that is not in operation at the moment before the change. The format change can be carried out depending on the length of the products delivered to the packaging machine, in that the appropriate film width is pushed in and the other is pulled back. In this operating mode, the brake 45 or 46 assigned to the retracted film 3 or 4 is not released.

Je nach Breite der Folie 3, 4 können mehrere Segmente 60 auf einer gemeinsamen Schwenkachse 59 befestigt sein, wobei die Walze 61 entsprechend unterteilt ist.Depending on the width of the film 3, 4, a plurality of segments 60 can be fastened on a common pivot axis 59, the roller 61 being subdivided accordingly.

Claims (6)

1. Device for selectively feeding one of two wrapping material sheets (3, 4) to a packaging machine, comprising a first supply roll (1) with a first wrapping material sheet (3) which is conveyed by way of a first storage (5) and a first guideway (7) to a holder (9), a second supply roll (2) with a second wrapping material sheet (4) which is conveyed by way of a second storage (6) and a second guideway (8) to the holder (9), as well as a take-off device (36) for intermittently drawing off one of the sheets (3, 4) from the holder (9) through a cutting device (31) for cutting off predetermined lengths of wrapping material pieces, with the two sheets (3, 4) being conveyed through converging guide channels (23) in the holder (9) to a common outlet slot (24) of the holder (9) beyond which only one of the two sheets (3, 4) projects, with there being disposed upstream of the holder (9) two feed elements (57, 58) which are switchable in opposite directions, of which one (57) during the switching operation retracts one sheet (3) through the slot (24) and the other (58) advances the other sheet (4) out of the slot (24), and with the feed elements (57, 58) being circular cylindrical segments (60) which are capable of swivelling about their axes (59) and whose periphery (62) during the switching operation comes into engagement with the associated sheet (3, 4) conveyed by way of a freely rotatably supported roller (61), characterised in that the two circular cylindrical segments (60) are pivotable about separate axes (59) spaced apart from one another and, for a synchronised swivel movement, are coupled together, and that both sheets (3, 4) are conveyed by way of the roller (61) which is freely rotatably supported centrally between the two swivelling axes (59) of the segments (60) and is disposed downstream of the two guideways (7, 8), that upstream of the feed elements (57, 58) and downstream of the storage (5, 6) a brake (45, 46) is associated with each sheet (3, 4), and that the brakes (45, 46) are each releasable by means of an operating element (47).
2. Device according to claim 1, characterised in that the frictional engagement of the segments (60) with the sheet (3, 4) is less than the frictional engagement of the associated brake (45, 46) with the sheet (3, 4).
3. Device according to claim 1 or 2, characterised in that the periphery (62) of the segments (60) has an elastomeric coating (63).
4. Device according to one of claims 1 to 3, characterised in that there is disposed in each of the two guideways (7, 8) upstream of the feed elements (57, 58) a switchable blocking element (50, 51) for securing one of the sheets (3, 4) in the retracted position.
5. Device according to claim 4, characterised in that each blocking element (50, 51) is disposed between the associated brake (45, 46) and the associated feed element (57, 58).
6. Device according to one of claims 1 to 5, characterised in that the holder (9) is capable of swivelling.
EP19880810178 1987-05-11 1988-03-21 Device for the selective feeding of one of two webs of enveloping material to a packaging machine Expired - Lifetime EP0294321B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1793/87 1987-05-11
CH179387 1987-05-11

Publications (3)

Publication Number Publication Date
EP0294321A2 EP0294321A2 (en) 1988-12-07
EP0294321A3 EP0294321A3 (en) 1989-04-19
EP0294321B1 true EP0294321B1 (en) 1991-12-11

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ID=4218728

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Application Number Title Priority Date Filing Date
EP19880810178 Expired - Lifetime EP0294321B1 (en) 1987-05-11 1988-03-21 Device for the selective feeding of one of two webs of enveloping material to a packaging machine

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EP (1) EP0294321B1 (en)
DE (1) DE3866785D1 (en)
ES (1) ES2027795T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1379457A1 (en) 2001-04-10 2004-01-14 Cermex-Quest Conditionnement Method for recharging a bundling machine using a plastic film and bundling machine carrying out said method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8902848A (en) * 1989-11-17 1991-06-17 Tevopharm Schiedam Bv APPARATUS FOR THE CONTINUOUS SUPPLY OF PIECES OF SHEET MATERIAL TO A PROCESSING MACHINE.
EP2336033B1 (en) * 2009-12-21 2013-01-09 MSK - Verpackungs-Systeme GmbH Method and device for wrapping a stack of goods with a film
DE102014015433B4 (en) * 2014-10-14 2017-09-07 Mcs Micronic Computer Systeme Gmbh Facility
DE102019203746A1 (en) * 2019-02-07 2020-08-13 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Glue

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH421795A (en) * 1965-01-29 1966-09-30 Sig Schweiz Industrieges Device on a processing machine for connecting the end of a strip of material to the beginning of a second strip of material
CS167015B1 (en) * 1973-07-24 1976-04-29
US4190475A (en) * 1978-05-16 1980-02-26 Marquip, Inc. Paper roll web splicing
IT1146017B (en) * 1981-04-09 1986-11-12 Sasib Spa METHOD AND DEVICE FOR THE SELF-SELECTIVE CONTINUOUS FEEDING OF TAPES EVEN WITH SCRAPS IN AN ELECTRONIC DEVICE FOR THE PROGRESSIVE CUTTING OF SHEETS OF PAPER PRINTED IN SHEETS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1379457A1 (en) 2001-04-10 2004-01-14 Cermex-Quest Conditionnement Method for recharging a bundling machine using a plastic film and bundling machine carrying out said method

Also Published As

Publication number Publication date
EP0294321A2 (en) 1988-12-07
ES2027795T3 (en) 1992-06-16
DE3866785D1 (en) 1992-01-23
EP0294321A3 (en) 1989-04-19

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