EP0962412B1 - Device and method for feeding film - Google Patents

Device and method for feeding film Download PDF

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Publication number
EP0962412B1
EP0962412B1 EP99107471A EP99107471A EP0962412B1 EP 0962412 B1 EP0962412 B1 EP 0962412B1 EP 99107471 A EP99107471 A EP 99107471A EP 99107471 A EP99107471 A EP 99107471A EP 0962412 B1 EP0962412 B1 EP 0962412B1
Authority
EP
European Patent Office
Prior art keywords
sensor
roller
distance
foil
supply roll
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
EP99107471A
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German (de)
French (fr)
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EP0962412A2 (en
EP0962412A3 (en
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INDAG Gesellschaft fuer Industriebedarf mbH and Co Betriebs KG
Original Assignee
INDAG Gesellschaft fuer Industriebedarf mbH and Co Betriebs KG
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Priority to SI9930499T priority Critical patent/SI0962412T1/en
Publication of EP0962412A2 publication Critical patent/EP0962412A2/en
Publication of EP0962412A3 publication Critical patent/EP0962412A3/en
Application granted granted Critical
Publication of EP0962412B1 publication Critical patent/EP0962412B1/en
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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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
    • B65H23/1825—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/042—Sensing the length of a web loop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1715—Means joining indefinite length work edge to edge

Definitions

  • the invention relates to a device for feeding sheet material, e.g. to Production of foil bags, in which fed from a supply roll sheet material and is deducted from a trigger device, and a corresponding Method.
  • the film material before the trigger under Suspense In a process in which sheet material is supplied from a supply roll in one piece is withdrawn from a withdrawal device for further processing, wherein the trigger means a predetermined clock or a predetermined speed which corresponds to the processing speed of the following processing stations is adjusted, the film material before the trigger under Suspense.
  • the supply roll is rotatably mounted and is withdrawn by the Slide in rotation.
  • Such a film feeding device is e.g. for the production of foil bags needed.
  • foil pouches include e.g. two rectangular side foils in the filled state at the side edges are each welded together. Between the fourth edges is possibly a bottom or bottom foil welded, the is folded up so that there is room for filling in the foil bag.
  • This Filled goods can e.g. to be a drink.
  • the voltage before the trigger device by a so-called.
  • Tensor device provided.
  • the film is over a Number of fixed and moving rollers out, arranged alternately are.
  • the movable rollers are acted upon by a spring force, the larger becomes, the smaller the distance between the movable or fixed guide rollers becomes. In this way, the film is always under tension.
  • the withdrawal force that is necessary is to deduct a certain amount of film material from the supply roll, not constant, since the diameter of the supply roll with increasing settlement of the Film material reduced and, accordingly, the expended torque changes, which changes the tension of the film.
  • the other is the Tension of the film is not constant, since the tensor device is not a constant force on the sheet material, when the distance between the movable and the fixed Pulleys changed as the spring force acting on the moving rollers acts, is proportional to the length of the spring.
  • FR 22 11 933 shows a device for unwinding and winding up of fabric, in which a electromagnetic brake ensures a constant tension during winding.
  • EP 015 97 18 discloses a speed control and regulation device for a continuous strip tape material.
  • the film material of a motor-driven supply roll fed, followed by at least one stationary Guided deflection roller and at least one sensor roller whose distance from the at least one deflection roller is variable, and finally by a trigger device subtracted, whereby the speed of the drive of the supply roll is increased, when the distance of the sensor roller from the guide roller a predetermined first Distance falls below, and the speed of the drive is lowered when the Distance of the sensor roller from the guide roller a second predetermined distance exceeds.
  • the feed device is a motor-driven supply roll with a supply line, a withdrawal device with a withdrawal capacity and a consumption sensor that depends on the consumption of film material of the Drive the supply roll is controlled and the between the supply roll and the trigger device is arranged, provided, wherein the consumption sensor at least a stationary guide roller, at least one sensor roller, which is stored and is arranged that they according to the difference between supply and Ab216 forme changed their distance to the guide roller, and comprises a sensor device, which detects the change in distance and falls below a predetermined first Distance increases the speed of the drive of the supply roll and when exceeding a predetermined second distance the speed of the drive decreased.
  • a slowdown or acceleration of the supply roll, without this complete Stopping can be beneficial when producing very large and therefore heavy stock rolls be used. In this way, the forces on the drive of the supply roll reduced.
  • the supply roll is exceeded the predetermined second distance, if necessary, completely switched off and at Falling below the predetermined first distance possibly switched back on. A Such a configuration may be advantageous if the fastest possible correction the position of the sensor roller is desired, or if the control as simple as possible should be designed.
  • the sensor roller may e.g. hang freely through the foil.
  • a guide means provided along which the at least one Sensor roller moves during the distance change, to ensure safe guidance to ensure the at least one sensor roller, without causing malfunction can come through a shift.
  • a particularly smooth sliding of the sensor roller in the guide device is achieved when it is oriented substantially vertically.
  • the at least one sensor roller can be the constant tension in the film material maintained by their own weight. Depending on the requirement, she can additionally be loaded by further weights to a predetermined voltage adjust.
  • the sensor device comprises a first Sensor that emits a signal to accelerate the drive when the distance the at least one sensor roller of the at least one guide roller a first predetermined distance falls below.
  • the Sensor means a second sensor which receives a signal to slow down the drive emits when the distance between the at least one sensor roller of the at least a deflection roller exceeds the second predetermined distance.
  • the device comprises a first safety sensor that generates an error signal when the at least one Sensor roller falls below a minimum distance from the at least one guide roller. Furthermore, the sensor device comprises a second safety sensor, which generates an error signal when the at least one sensor roller exceeds a maximum distance from the at least one guide roller. Should a malfunction occur or the supply roll be completely unwound, Thus, an error signal is generated in these developments, by the example. on Warning signal is generated, which warns the operator.
  • the sensors or safety sensors may e.g. through mechanical switches are formed, which are triggered by the moving sensor roller.
  • a particularly simple and reliable reaction sees optical sensor elements, e.g. Photocells, before. Due to the non-contact operation of this optical Sensors, the movement of the sensor roller is not affected, resulting in a further constant maintenance of the tension of the film material leads.
  • proximity switches are sensors or safety sensors provided that ensure a simple and reliable construction, which is also pollution-independent.
  • the trigger device and the operating components shut off, which further process the film. If a malfunction occurs or if the supply roll is completely unwound, is in this way the Promotion interrupted until normal operation is possible again.
  • the trigger device and the operating components shut off, which further process the film. If a malfunction occurs or if the supply roll is completely unwound, is in this way the Promotion interrupted until normal operation is possible again.
  • Another embodiment is at a maximum distance of at least a sensor roller of the at least one guide roller of the motor of the supply roll, shut off the trigger and the operating components that the Process film. When exceeding a maximum distance is obvious a malfunction in the removal of the film material, so that in addition the engine of the supply roll must be turned off to another feed to prevention.
  • the error signal which is generated by the respective safety sensors, at least for shutdown the extraction device and those operating components used, which further process the supplied film.
  • the extraction device is operated continuously. Also at a cyclic operation of the trigger device is the device according to the invention or the inventive method advantageously used, as by the device of the invention and the inventive method even then it is ensured that the tension of the film material before the extraction device remains constant.
  • the device according to the invention in several parallel feeders be used several times.
  • the device according to the invention in several parallel feeders be used several times.
  • the motors of the supply rolls independently controlled by a common control.
  • FIGS 1 and 2 show a first embodiment of the device according to the invention.
  • 1 denotes a supply roll having a diameter D, which coincides with progressively reduced. From the supply roll 1, the film 15 is unwound and in a consumption sensor 81 around a fixed guide roller 19 and a movable sensor roller 21 guided.
  • 67a and 67b show schematically a Discharge device, e.g. Rolls which are frictionally connected to the film and operated at a speed or a clock, the other Foil processing corresponds.
  • the actual design of the motors 3 and 69 of the Supply roll 1 and the deduction device 67a, 67b is not of interest here, so that the motors are shown only schematically.
  • the movement of the foil material is indicated by the arrow 5.
  • the sensor roller 21 is in guides 41a and 41b mounted, which are provided vertically in a guide frame 31. In extension the axis of the sensor roller is a trigger 39 is provided, the movement the sensor roller 21 passes up or down at light barriers 43, 45, 47 and 49.
  • the sensors are connected via a signal line to the controller 9 of the motor 3 the supply roll 1 connected.
  • the upward and downward movement of the sensor roller 21 is indicated by the arrows 35 and the rotational movement of the supply roll 1 is through the arrow 7 shown.
  • further components may be provided in front of the extraction device 67a, 67b provided for processing the film, e.g. a welding device for forming welds in the sheet material, a punching device for Formation of holes, or the like.
  • FIG. 2 a shows an operating state of the first embodiment of the invention Device shown in which the sensor roller 21 is its lowest state in Normal operation, reached at the level of the sensor 47.
  • FIG. 2b shows an intermediate state, in which the sensor roller 21 between the sensors 45 and 47 upwards emotional.
  • Figure 2c shows an operating condition in which the sensor roller 21 their highest point in normal operation, at the level of the sensor 45, reached.
  • the discharge device 67a, 67b pulls on the film material 15 in the direction of arrow 5 due to the frictional engagement, the between the trigger and the film is present.
  • the sensor roller 21 in the guides 41 a and 41b upwards. If the sensor roller 21 reaches the height of the upper optical sensor (as shown for example in Figure 2c), the trigger 39 triggers the photocell 45 from. This gives a signal to the controller 9, which in turn the motor 3 of the supply roll. 1 turns on, so that the supply roll 1 rotates in the direction 7. This way will fed new film material 15 and the sensor roller 21 moves in the guides 41a, 41b down.
  • the trigger 39 When the trigger 39 reaches the sensor 47, it becomes Photocell triggered. A signal is given to the controller 9, the motor 3rd Turn off the supply roll 9, so that the further film supply is omitted (FIG 2a). Moved by the ongoing withdrawal operation of the discharge device 67a, 67b Accordingly, the sensor roller 21 back up, as shown in FIG 2b is shown. Upon reaching the height of the sensor 45, as described above, turn the motor 3 of the supply roll 1 turned on.
  • the discharge device 67a, 67b can be operated continuously or in cycles. In cyclic operation, the sensor roller 21 also moves in cycles while moving upwards.
  • the take-off device 67a, 67b works further.
  • the sensor roller 21 moves upward.
  • the trigger 39 passes the Photocell 45.
  • no further foil can be supplied.
  • the sensor roller 21 moves accordingly upwards. If she reaches an upper one Security sensor 43, again e.g. a photocell, then becomes an error signal generated and all components of the Folienzu slaughterleton anatomy including the trigger device 67a, 67b are turned off. It can e.g. an acoustic and optical signal can be generated in addition, the operator on it indicates that a new supply roll 1 must be inserted.
  • the safety sensor Of course, 43 also responds when, due to another malfunction, the film delivery is interrupted, e.g. if the supply roll is jammed.
  • a malfunction of the controller 9 or of the motor 3 can lead to that the supply roll 1 is not switched off in time when the sensor roller 21st with the trigger 39 passes the sensor 47.
  • the sensor roller 21 then continues in the guides 41 a, 41 b down to a lower security sensor 49, e.g. again, e.g. a photocell.
  • This photocell emits a signal that the complete system including the supply roll 1 and the withdrawal device 67a, 67b turns off, e.g. by interrupting the power supply.
  • an audible or visual signal is given to the operating personnel indicates the corresponding malfunction.
  • the sensor 49 also comes into action if e.g. the film material 15 is torn before reaching the sensor roller 21. Even then, the sensor roller 21 moves downward past the sensor 47 until to the sensor 49 and the operator can be warned by the error signal become.
  • At the lower end of the guide rails 41a, 41b or at a corresponding provided support the sensor roller 21 in its downward movement stopped.
  • the shown Embodiment has two parallel film strands, which before the Discharge device 68, 70 are brought together.
  • Such parallel film feeds are e.g. necessary if two foils are welded together, e.g. around To form foil bag.
  • the films may be e.g. Aluminum laminate films his. Upstream of the discharge device 68, 70 or downstream of which, e.g. a welding device not shown may be provided.
  • each consumption sensor 80, 82 each comprise three fixed deflection rollers 20 and 24 and two movable sensor rollers 22 and 26.
  • the movable sensor rollers 22 and 26 are each interconnected by connections 40 and 42, so that the vertical movement of the sensor rollers 22 and 26 of each consumption sensor 80 and 82 takes place simultaneously.
  • the vertical movements of the sensor rollers 22, 26 are indicated by arrows 36, 38. 44 and 50, the safety sensors of the upper consumption sensor 80 and 60, 66 denote the safety sensors of the lower consumption sensor 82. 46 and 48, the sensors at the upper and lower deflection points of the sensor rollers 22 of the consumption sensor 80 and 62, 64, the corresponding sensors of the lower storage sensor 82nd
  • the optical sensors are designed, for example, as light barriers. Not shown in Figure 3 are the signal lines that connect the individual photocells with the controller 10 for the motors 6, 8 of the supply rolls 2, 4. 28, 30 denote pulleys for the individual sheets 16, 18 before they are withdrawn from the common puller 68, 70 which is driven by the motor 72. 32, 34 denote fixed supports for the deflection rollers 20 and 24 of the individual consumption sensors.
  • FIG. 4 shows the consumption sensor 80 in detail.
  • the structure of the consumption sensor 82 is identical. Both the consumption sensors 80, 82 and the motors 6.8 of the individual foil strands work independently of each other.
  • FIG. 4 shows the signal paths 52, 58, from the optical safety sensors 44, 50 to an error signal F lead when the connection 40 between them on the safety sensors 44 or 50 passes by. The operation of the optical safety sensors for Shutdown of the corresponding operating components corresponds to the first Embodiment described above.
  • FIG. 4 shows the signal paths 54, 56 of the sensors 46, 48, the on or off of the engine 6 of the supply roll 2 in Figure 3 lead.
  • the engine 6 is the Supply roll 2 is turned on when the height of the sensor roller 22, the optical sensor 46 happens, and the motor 6 is turned off when the height of the sensor roller 22 passes the sensor 48. Due to the arrangement of the fixed guide rollers 20 and the sensor rollers 22 and by the provision of three guide rollers 20th and two sensor rollers 22 ensures a secure guidance of the film, as the Position of the sensor rollers 22 is self-stabilizing.
  • the first embodiment of the Figures 1 and 2 are used for feeding a plurality of film strands, if a corresponding number of consumption sensors is provided.
  • a single consumption sensor as e.g. is shown in Figure 4 and in duplicate Embodiment shown in Figure 3, for the supply of a single sheet strand be used.
  • the applied force is constant and the voltage the film in front of the discharge device 67a, 67b, 68, 70 is constant. So will one ensures high-precision feeding of the film material, even at very high Operating speeds are possible in film processing lines nowadays are common.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Advancing Webs (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

The arrangement has motor-driven supply roller (1) for delivering foil material with a delivery power, a traction arrangement (67a,b) for pulling the foil material, and a consumption sensor between the roller and traction arrangement with which the roller is controlled depending on the consumption of foil. The sensor contains at least one fixed direction changing roller (19) and at least one sensor roller (21) whose distance to the direction changing roller varies with the difference in delivery and traction power. A sensor device detects the distance changes and increases the storage roller drive speed if the distance falls below a first defined distance, and reduces the speed if it exceeds a second predefined distance. An Independent claim is also included for a method of conveying foil.

Description

Die Erfindung betrifft eine Vorrichtung zum Zuführen von Folienmaterial, z.B. zur Herstellung von Folienbeuteln, bei welchem von einer Vorratsrolle Folienmaterial zugeführt und von einer Abzugseinrichtung abgezogen wird, und ein entsprechendes Verfahren.The invention relates to a device for feeding sheet material, e.g. to Production of foil bags, in which fed from a supply roll sheet material and is deducted from a trigger device, and a corresponding Method.

Bei einem Prozeß, bei dem Folienmaterial von einer Vorratsrolle am Stück zugeführt wird und von einer Abzugseinrichtung zur weiteren Verarbeitung abgezogen wird, wobei die Abzugseinrichtung einen vorgegebenen Takt oder eine vorgegebene Geschwindigkeit aufweist, die an die Verarbeitungsgeschwindigkeit folgender Verarbeitungsstationen angepaßt ist, muß das Folienmaterial vor der Abzugseinrichtung unter Spannung stehen. Die Vorratsrolle ist drehbar gelagert und wird durch die abgezogene Folie in Drehung versetzt.In a process in which sheet material is supplied from a supply roll in one piece is withdrawn from a withdrawal device for further processing, wherein the trigger means a predetermined clock or a predetermined speed which corresponds to the processing speed of the following processing stations is adjusted, the film material before the trigger under Suspense. The supply roll is rotatably mounted and is withdrawn by the Slide in rotation.

Eine derartige Folienzuführeinrichtung wird z.B. zur Herstellung von Folienbeuteln benötigt. Solche Folienbeutel umfassen z.B. zwei rechteckige Seitenfolien, die im gefüllten Zustand an den Seitenkanten jeweils miteinander verschweißt sind. Zwischen den vierten Kanten ist ggf. eine Boden- oder Standfolie eingeschweißt, die derart aufgefaltet ist, daß Raum für Füllgut in dem Folienbeutel vorhanden ist. Dieses Füllgut kann z.B. ein Getränk sein.Such a film feeding device is e.g. for the production of foil bags needed. Such foil pouches include e.g. two rectangular side foils in the filled state at the side edges are each welded together. Between the fourth edges is possibly a bottom or bottom foil welded, the is folded up so that there is room for filling in the foil bag. This Filled goods can e.g. to be a drink.

Bei bekannten Zuführeinrichtungen wird die Spannung vor der Abzugseinrichtung durch eine sogen. Tensoreinrichtung zur Verfügung gestellt. Die Folie wird über eine Anzahl von feststehenden und beweglichen Walzen geführt, die alternierend angeordnet sind. Die beweglichen Walzen sind mit einer Federkraft beaufschlagt, die größer wird, je kleiner der Abstand zwischen den beweglichen bzw. feststehenden Umlenkwalzen wird. Auf diese Weise steht die Folie immer unter Spannung.In known feeders, the voltage before the trigger device by a so-called. Tensor device provided. The film is over a Number of fixed and moving rollers out, arranged alternately are. The movable rollers are acted upon by a spring force, the larger becomes, the smaller the distance between the movable or fixed guide rollers becomes. In this way, the film is always under tension.

Bei einer solchen bekannten Zuführeinrichtung ist die Abzugskraft, die notwendig ist, um eine bestimmte Menge Folienmaterial von der Vorratsrolle abzuziehen, nicht konstant, da sich der Durchmesser der Vorratsrolle bei zunehmender Abwicklung des Folienmaterials verkleinert und dementsprechend das aufzuwendende Drehmoment sich verändert, wodurch sich die Spannung der Folie verändert. Zum anderen ist die Spannung der Folie nicht konstant, da die Tensoreinrichtung keine konstante Kraft auf das Folienmaterial ausübt, wenn sich der Abstand der beweglichen und der feststehenden Umlenkrollen verändert, da die Federkraft, die auf die beweglichen Rollen wirkt, proportional zur Längenausdehnung der Feder ist.In such a known feeder, the withdrawal force that is necessary is to deduct a certain amount of film material from the supply roll, not constant, since the diameter of the supply roll with increasing settlement of the Film material reduced and, accordingly, the expended torque changes, which changes the tension of the film. The other is the Tension of the film is not constant, since the tensor device is not a constant force on the sheet material, when the distance between the movable and the fixed Pulleys changed as the spring force acting on the moving rollers acts, is proportional to the length of the spring.

Bei der hohen Präzision, die zur Herstellung von Folienbeuteln nötig ist, wobei in einer automatischen Zuführeinrichtung sehr hohe Geschwindigkeit realisiert werden, ist es jedoch von großer Bedeutung, dass das Folienmaterial genau zugeführt wird. Die Spannung von der Auszugseinrichtung sollte daher möglichst bald konstant sein.In the high precision, which is necessary for the production of foil bags, where in one automatic feeder very high speed can be realized However, it is very important that the film material is fed exactly. The voltage from the pull-out device should therefore be constant as soon as possible.

FR 22 11 933 zeigt eine Vorrichtung zum Abwickeln und Aufwickeln von Stoff, bei der eine elektromagnetische Bremse beim Aufwickeln für eine konstante Spannung sorgt. Eine stromauf der Bremse angeordnete Walzenanordnung, die aus zwei ortfesten und einer beweglichen Walze besteht, steuert den Motor einer Vorratsrolle. Dazu kann die bewegliche Walze zwei Schalter der Versorgungsschaltung des Motors betätigen, wobei die Schalter in verschiedenen Abständen zu einer der ortsfesten Walzen angeordnet ist. Durch diese Walzenanordnung und die Motorsteuerung werden die verschiedenen linearen Geschwindigkeiten beim Ab- und Aufwickeln ausgeglichen.FR 22 11 933 shows a device for unwinding and winding up of fabric, in which a electromagnetic brake ensures a constant tension during winding. A arranged upstream of the brake roller assembly consisting of two stationary and a movable Roller consists, controls the engine of a supply roll. This can be the moving Press two switches on the supply circuit of the motor, with the switches in is arranged at different distances to one of the stationary rollers. Through this roller arrangement and the engine control will be the different linear speeds balanced during unwinding and winding.

EP 015 97 18 offenbart eine Geschwindigkeitskontroll- und Reguliereinrichtung für ein durchgehendes Streifenbandmaterial.EP 015 97 18 discloses a speed control and regulation device for a continuous strip tape material.

US 36 84 205 offenbart ein Rollenaufwickelverfahren und eine Rollenaufwickelvorrichtung.US 36 84 205 discloses a Rollenaufwickelverfahren and a Rollenaufwickelvorrichtung.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zum Zuführen von Folie anzugeben, mit deren Hilfe eine weitgehend konstante Spannung vor der Abzugseinrichtung realisiert wird.It is therefore an object of the present invention, an apparatus and a method To specify for supplying film, with the help of a largely constant voltage is realized before the extraction device.

Diese Aufgabe wird durch eine Folienzuführungsvorrichtung mit den Merkmalen des Anspruchs 1 und ein Folienzuführungsverfahren mit den Merkmalen des Anspruchs 19 gelöst.This object is achieved by a film feeding device having the features of the claim 1 and a film feeding method having the features of claim 19 solved.

Bei dem erfindungsgemäßen Zuführungsverfahren wird das Folienmaterial von einer motorgetriebenen Vorratsrolle zugeführt, im Anschluss daran um mindestens eine ortsfeste Umlenkwalze und mindestens eine Sensorwalze geführt, deren Abstand zu der mindestens einen Umlenkwalze variabel ist, und schließlich von einer Abzugseinrichtung abgezogen, wobei die Geschwindigkeit des Antriebs der Vorratsrolle erhöht wird, wenn der Abstand der Sensorwalze von der Umlenkwalze einen vorgegebenen ersten Abstand unterschreitet, und die Geschwindigkeit des Antriebs erniedrigt wird, wenn der Abstand der Sensorwalze von der Umlenkwalze einen zweiten vorgegebenen Abstand überschreitet.In the feeding method according to the invention, the film material of a motor-driven supply roll fed, followed by at least one stationary Guided deflection roller and at least one sensor roller whose distance from the at least one deflection roller is variable, and finally by a trigger device subtracted, whereby the speed of the drive of the supply roll is increased, when the distance of the sensor roller from the guide roller a predetermined first Distance falls below, and the speed of the drive is lowered when the Distance of the sensor roller from the guide roller a second predetermined distance exceeds.

Bei der erfindungsgemäßen Zuführeinrichtung ist dazu eine motorgetriebene Vorratsrolle mit einer Zuführleitung, eine Abzugseinrichtung mit einer Abzugsleistung und ein Verbrauchssensor, mit dem abhängig von dem Verbrauch an Folienmaterial der Antrieb der Vorratsrolle gesteuert wird und der zwischen der Vorratsrolle und der Abzugseinrichtung angeordnet ist, vorgesehen, wobei der Verbrauchssensor wenigstens eine ortsfeste Umlenkwalze, wenigstens eine Sensorwalze, die so gelagert und angeordnet ist, daß sie entsprechend der Differenz zwischen Zuführ- und Abführleistung ihren Abstand zur Umlenkwalze verändert, und eine Sensoreinrichtung umfaßt, die die Abstandsänderung erfaßt und bei Unterschreiten eines vorgegebenen ersten Abstandes die Geschwindigkeit des Antriebs der Vorratsrolle erhöht und bei Überschreiten eines vorgegebenen zweiten Abstandes die Geschwindigkeit des Antriebs erniedrigt.In the feed device according to the invention is a motor-driven supply roll with a supply line, a withdrawal device with a withdrawal capacity and a consumption sensor that depends on the consumption of film material of the Drive the supply roll is controlled and the between the supply roll and the trigger device is arranged, provided, wherein the consumption sensor at least a stationary guide roller, at least one sensor roller, which is stored and is arranged that they according to the difference between supply and Abführleistung changed their distance to the guide roller, and comprises a sensor device, which detects the change in distance and falls below a predetermined first Distance increases the speed of the drive of the supply roll and when exceeding a predetermined second distance the speed of the drive decreased.

Mit dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung wird durch den Motorantrieb der Vorratsrolle erreicht, daß zum Abziehen keine zusätzliche Kraft nötig ist. Auf diese Weise kann auch keine unterschiedliche Abzugskraft auftreten, wenn sich der aktuelle Durchmesser der Vorratsrolle durch das Abwickeln des Folienmaterials verändert. Die Vorratsrolle wird jedoch nicht gleichmäßig angetrieben. Verlangsamt sich die Drehung der Vorratsrolle, so wird durch die Abzugseinrichtung der Abstand der mindestens einen Sensorwalze und der mindestens einen Umlenkwalze verkleinert. Die Kraft, die die Sensorwalze dabei auf das Folienmaterial ausübt, ist konstant, so daß während dieses Vorganges die Spannung auf das Folienmaterial vor der Abzugseinrichtung konstant bleibt. Erst wenn die Sensorwalze einen vorgegebenen ersten Abstand von der Umlenkwalze unterschreitet, wird durch eine Sensoreinrichtung der Antrieb der Vorratsrolle beschleunigt. Der Abstand der mindestens einen Sensorwalze von der mindestens einen feststehenden Umlenkwalze wird dementsprechend wieder vergrößert. Auch während dieses Prozesses ist jedoch die Spannung vor der Abzugseinrichtung von der Kraft bestimmt, die die Sensorwalze auf das Folienmaterial ausübt und dementsprechend konstant, da keine Federelemente vorgesehen sind. Mit dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung ist also während des gesamten Betriebes eine konstante Spannung des Folienmateriales gewährleistet.With the method according to the invention and the device according to the invention achieved by the motor drive of the supply roll, that for removing no additional Force is needed. In this way, no different peel force can occur when the current diameter of the supply roll by the unwinding of the Changed film material. The supply roll is not driven evenly. Slows the rotation of the supply roll, so is by the trigger device the distance between the at least one sensor roller and the at least one guide roller reduced. The force exerted by the sensor roller on the film material, is constant, so that during this process the tension on the film material remains constant before the withdrawal device. Only when the sensor roller a predetermined first distance from the guide roller below, is by a sensor device accelerates the drive of the supply roll. The distance of at least a sensor roller of the at least one fixed guide roller is accordingly enlarged again. Even during this process, however, is the Tension before the extraction device determined by the force that the sensor roller exerts on the film material and accordingly constant, since no spring elements are provided. With the method according to the invention and the invention Device is thus a constant throughout the operation Ensures tension of the film material.

Eine Verlangsamung bzw. Beschleunigung der Vorratsrolle, ohne diese vollständig zu stoppen, kann vorteilhaft sein, wenn sehr große und damit schwere Vorratsrollen zum Einsatz kommen. Auf diese Weise werden die Kräfte auf den Antrieb der Vorratsrolle verringert. In einer anderen Ausgestaltung wird die Vorratsrolle bei Überschreiten des vorgegebenen zweiten Abstandes ggf. vollständig abgeschaltet und bei Unterschreiten des vorgegebenen ersten Abstandes ggf. wieder angeschaltet. Eine solche Ausgestaltung kann vorteilhaft sein, wenn eine möglichst schnelle Korrektur der Lage der Sensorwalze erwünscht ist, oder wenn die Steuerung möglichst einfach gestaltet werden soll.A slowdown or acceleration of the supply roll, without this complete Stopping can be beneficial when producing very large and therefore heavy stock rolls be used. In this way, the forces on the drive of the supply roll reduced. In another embodiment, the supply roll is exceeded the predetermined second distance, if necessary, completely switched off and at Falling below the predetermined first distance possibly switched back on. A Such a configuration may be advantageous if the fastest possible correction the position of the sensor roller is desired, or if the control as simple as possible should be designed.

Die Sensorwalze kann z.B. durch die Folie gehalten frei hängen. Vorzugsweise ist jedoch eine Führungseinrichtung vorgesehen, entlang der sich die wenigstens eine Sensorwalze während der Abstandsveränderung bewegt, um eine sichere Führung der mindestens einen Sensorwalze zu gewährleisten, ohne daß es zu Fehlfunktionen durch eine Verlagerung kommen kann.The sensor roller may e.g. hang freely through the foil. Preferably However, a guide means provided along which the at least one Sensor roller moves during the distance change, to ensure safe guidance to ensure the at least one sensor roller, without causing malfunction can come through a shift.

Ein besonders reibungsloses Gleiten der Sensorwalze in der Führungseinrichtung wird erreicht, wenn diese im wesentlichen senkrecht ausgerichtet ist.A particularly smooth sliding of the sensor roller in the guide device is achieved when it is oriented substantially vertically.

Die mindestens eine Sensorwalze kann dabei die konstante Spannung in dem Folienmaterial durch ihr eigenes Gewicht aufrechterhalten. Je nach Anforderung kann sie zusätzlich durch weitere Gewichte belastet werden, um eine vorgegebene Spannung einzustellen.The at least one sensor roller can be the constant tension in the film material maintained by their own weight. Depending on the requirement, she can additionally be loaded by further weights to a predetermined voltage adjust.

Gemäß einer bevorzugten Ausgestaltung umfaßt die Sensoreinrichtung einen ersten Sensor, der ein Signal zum Beschleunigen des Antriebs abgibt, wenn der Abstand der mindestens einen Sensorwalze von der mindestens einen Umlenkwalze einen ersten vorgegebenen Abstand unterschreitet. In weiterer Ausgestaltung umfaßt die Sensoreinrichtung einen zweiten Sensor, der ein Signal zum Verlangsamen des Antriebs abgibt, wenn der Abstand der mindestens einen Sensorwalze von der mindestens einen Umlenkwalze den zweiten vorgegebenen Abstand überschreitet. Mit solchen Sensoren kann die Motorsteuerung auf sehr einfache Weise realisiert werden.According to a preferred embodiment, the sensor device comprises a first Sensor that emits a signal to accelerate the drive when the distance the at least one sensor roller of the at least one guide roller a first predetermined distance falls below. In a further embodiment, the Sensor means a second sensor which receives a signal to slow down the drive emits when the distance between the at least one sensor roller of the at least a deflection roller exceeds the second predetermined distance. With such Sensors, the engine control can be realized in a very simple manner.

Die erfindungsgemäße Vorrichtung umfaßt einen ersten Sicherheitssensor, der ein Fehlersignal erzeugt, wenn die mindestens eine Sensorwalze einen Minimalabstand von der mindestens einen Umlenkwalze unterschreitet. Ferner umfaßt die Sensoreinrichtung einen zweiten Sicherheitssensor, der ein Fehlersignal erzeugt, wenn die mindestens eine Sensorwalze einen maximalen Abstand von der mindestens einen Umlenkwalze überschreitet. Sollte eine Fehlfunktion auftreten oder die Vorratsrolle vollständig abgewickelt sein, so wird bei diesen Weiterbildungen ein Fehlersignal erzeugt, durch das z.B. ein Warnsignal erzeugt wird, das das Bedienungspersonal warnt.The device according to the invention comprises a first safety sensor that generates an error signal when the at least one Sensor roller falls below a minimum distance from the at least one guide roller. Furthermore, the sensor device comprises a second safety sensor, which generates an error signal when the at least one sensor roller exceeds a maximum distance from the at least one guide roller. Should a malfunction occur or the supply roll be completely unwound, Thus, an error signal is generated in these developments, by the example. on Warning signal is generated, which warns the operator.

Die Sensoren bzw. Sicherheitssensoren können z.B. durch mechanische Schalter gebildet werden, die von der sich bewegenden Sensorwalze ausgelöst werden. Eine besonders einfache und zuverlässige Reaiisierung sieht dagegen optische Sensorelemente, z.B. Lichtschranken, vor. Durch die berührungslose Betätigung dieser optischen Sensoren wird die Bewegung der Sensorwalze nicht beeinflußt, was zu einer weiteren Konstanthaltung der Spannung des Folienmateriales führt.The sensors or safety sensors may e.g. through mechanical switches are formed, which are triggered by the moving sensor roller. A particularly simple and reliable reaction, however, sees optical sensor elements, e.g. Photocells, before. Due to the non-contact operation of this optical Sensors, the movement of the sensor roller is not affected, resulting in a further constant maintenance of the tension of the film material leads.

In einer anderen Ausführungsform sind Näherungsschalter als Sensoren bzw. Sicherheitssensoren vorgesehen, die einen einfachen und zuverlässigen Aufbau gewährleisten, der zudem verschmutzungsunabhängiger ist.In another embodiment, proximity switches are sensors or safety sensors provided that ensure a simple and reliable construction, which is also pollution-independent.

In einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens wird bei Unterschreiten eines Mindestabstandes die Abzugseinrichtung und die Betriebskomponenten abgeschaltet, die die Folie weiterverarbeiten. Bei Auftreten einer Fehlfunktion oder wenn die Vorratsrolle vollständig abgewickelt ist, wird auf diese Weise die Förderung unterbrochen, bis ein Normalbetrieb wieder möglich ist. Gemäß einer weiteren Ausgestaltung wird bei Überschreiten eines Maximalabstandes der mindestens einen Sensorwalze von der mindestens einen Umlenkwalze der Motor der Vorratsrolle, die Abzugseinrichtung und die Betriebskomponenten abgeschaltet, die die Folie weiterverarbeiten. Beim Überschreiten eines Maximalabstandes liegt offensichtlich eine Fehlfunktion bei der Abführung des Folienmaterials vor, so daß zusätzlich der Motor der Vorratsrolle abgeschaltet werden muß, um eine weitere Zuführung zu unterbinden.In an advantageous embodiment of the method according to the invention is at Fall below a minimum distance the trigger device and the operating components shut off, which further process the film. If a malfunction occurs or if the supply roll is completely unwound, is in this way the Promotion interrupted until normal operation is possible again. According to one Another embodiment is at a maximum distance of at least a sensor roller of the at least one guide roller of the motor of the supply roll, shut off the trigger and the operating components that the Process film. When exceeding a maximum distance is obvious a malfunction in the removal of the film material, so that in addition the engine of the supply roll must be turned off to another feed to prevention.

Zur Realisierung dieser Weiterbildungen des erfindungsgemäßen Verfahrens wird bei einer vorteilhaften Weiterbildung der erfindungsgemäßen Vorrichtung das Fehlersignal, das von den jeweiligen Sicherheitssensoren erzeugt wird, zumindest zur Abschaltung der Abzugsvorrichtung und denjenigen Betriebskomponenten eingesetzt, die die zugeführte Folie weiterverarbeiten.To realize these developments of the method according to the invention is at an advantageous embodiment of the device according to the invention, the error signal, which is generated by the respective safety sensors, at least for shutdown the extraction device and those operating components used, which further process the supplied film.

Je nach Anforderung wird die Abzugseinrichtung kontinuierlich betrieben. Auch bei einem taktweisen Betrieb der Abzugseinrichtung ist die erfindungsgemäße Vorrichtung bzw. das erfindungsgemäße Verfahren vorteilhafterweise einsetzbar, da durch die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren auch dann sichergestellt ist, daß die Spannung des Folienmaterials vor der Abzugseinrichtung konstant bleibt.Depending on the requirement, the extraction device is operated continuously. Also at a cyclic operation of the trigger device is the device according to the invention or the inventive method advantageously used, as by the device of the invention and the inventive method even then it is ensured that the tension of the film material before the extraction device remains constant.

Sind zur weiteren Verarbeitung der Folie mehrere einzelne Folienstränge notwendig, so kann die erfindungsgemäße Vorrichtung in mehreren parallelen Zuführungseinrichtungen mehrfach eingesetzt werden. Z.B. können zwei Folienstränge zur Zuführung von Folienmaterial zur Bildung der jeweiligen zwei Seitenfolien eines Folienbeutels eingesetzt werden. Vorteilhafterweise werden dabei die Motoren der Vorratsrollen unabhängig voneinander von einer gemeinsamen Steuerung angesteuert.Are more individual film strands necessary for further processing of the film, Thus, the device according to the invention in several parallel feeders be used several times. For example, can use two foil strands for delivery of sheet material for forming the respective two side sheets of a film bag be used. Advantageously, while the motors of the supply rolls independently controlled by a common control.

Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung wird im folgenden anhand der anliegenden Zeichnungen näher erläutert.The inventive method and the device according to the invention is in The following explained in more detail with reference to the accompanying drawings.

Dabei zeigt

Figur 1
eine perspektivische, schematisierte Ansicht einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung,
Figur 2
verschiedene Betriebszustände der ersten Ausführungsform der erfindungsgemäßen Vorrichtung,
Figur 3
eine schematisierte Seitenansicht einer zweiten Ausführungsform der erfindungsgemäßen Vorrichtung und
Figur 4
ein Detail der Figur 3, das einen Verbrauchssensor der zweiten Ausführungsform zeigt.
It shows
FIG. 1
a perspective, schematic view of a first embodiment of the device according to the invention,
FIG. 2
various operating states of the first embodiment of the device according to the invention,
FIG. 3
a schematic side view of a second embodiment of the device according to the invention and
FIG. 4
a detail of Figure 3, showing a consumption sensor of the second embodiment.

Figur 1 und 2 zeigen eine erste Ausführungsform der erfindungsgemäßen Vorrichtung. 1 bezeichnet eine Vorratsrolle, die einen Durchmesser D aufweist, der sich mit fortschreitender Abwicklung verkleinert. Von der Vorratsrolle 1 wird die Folie 15 abgewickelt und in einem Verbrauchssensor 81 um eine feststehende Umlenkrolle 19 und eine bewegliche Sensorwalze 21 geführt. 67a und 67b zeigen schematisch eine Abzugseinrichtung, z.B. Walzen, die durch Reibschluß mit der Folie verbunden sind und mit einer Geschwindigkeit bzw. einem Takt betrieben werden, der der weiteren Folienverarbeitung entspricht. Die tatsächliche Ausführung der Motoren 3 bzw. 69 der Vorratsrolle 1 bzw. der Abzugseinrichtung 67a, 67b ist hier nicht von Interesse, so daß die Motoren nur schematisch dargestellt sind. Die Bewegung des Folienmateriales ist mit dem Pfeil 5 angedeutet. Die Sensorwalze 21 ist in Führungen 41a und 41b gelagert, die senkrecht in einem Führungsgestell 31 vorgesehen sind. In Verlängerung der Achse der Sensorwalze ist ein Auslöser 39 vorgesehen, der bei Bewegung der Sensorwalze 21 nach oben bzw. unten an Lichtschranken 43, 45, 47 und 49 vorbeiläuft. Die Sensoren sind über eine Signalleitung mit der Steuerung 9 des Motors 3 der Vorratsrolle 1 verbunden. Die Auf- und Abwärtsbewegung der Sensorwalze 21 ist durch die Pfeile 35 angedeutet und die Drehbewegung der Vorratsrolle 1 wird durch den Pfeil 7 gezeigt.Figures 1 and 2 show a first embodiment of the device according to the invention. 1 denotes a supply roll having a diameter D, which coincides with progressively reduced. From the supply roll 1, the film 15 is unwound and in a consumption sensor 81 around a fixed guide roller 19 and a movable sensor roller 21 guided. 67a and 67b show schematically a Discharge device, e.g. Rolls which are frictionally connected to the film and operated at a speed or a clock, the other Foil processing corresponds. The actual design of the motors 3 and 69 of the Supply roll 1 and the deduction device 67a, 67b is not of interest here, so that the motors are shown only schematically. The movement of the foil material is indicated by the arrow 5. The sensor roller 21 is in guides 41a and 41b mounted, which are provided vertically in a guide frame 31. In extension the axis of the sensor roller is a trigger 39 is provided, the movement the sensor roller 21 passes up or down at light barriers 43, 45, 47 and 49. The sensors are connected via a signal line to the controller 9 of the motor 3 the supply roll 1 connected. The upward and downward movement of the sensor roller 21 is indicated by the arrows 35 and the rotational movement of the supply roll 1 is through the arrow 7 shown.

Je nach Anwendung können vor der Abzugseinrichtung 67a, 67b weitere Komponenten vorgesehen sein, die zur Verarbeitung der Folie dienen, z.B. eine Schweißeinrichtung zum Bilden von Schweißnähten im Folienmaterial, eine Stanzeinrichtung zur Bildung von Löchern, oder ähnliches.Depending on the application, further components may be provided in front of the extraction device 67a, 67b provided for processing the film, e.g. a welding device for forming welds in the sheet material, a punching device for Formation of holes, or the like.

In Figur 2a ist ein Betriebszustand der ersten Ausführungsform der erfindungsgemäßen Vorrichtung gezeigt, bei welcher die Sensorwalze 21 ihren tiefsten Zustand im Normalbetrieb, auf Höhe des Sensors 47 erreicht. Figur 2b zeigt einen Zwischenzustand, in dem sich die Sensorwalze 21 zwischen den Sensoren 45 und 47 nach oben bewegt. Figur 2c zeigt einen Betriebszustand, in dem die Sensorwalze 21 ihren höchsten Punkt bei Normalbetrieb, auf Höhe des Sensors 45, erreicht. FIG. 2 a shows an operating state of the first embodiment of the invention Device shown in which the sensor roller 21 is its lowest state in Normal operation, reached at the level of the sensor 47. FIG. 2b shows an intermediate state, in which the sensor roller 21 between the sensors 45 and 47 upwards emotional. Figure 2c shows an operating condition in which the sensor roller 21 their highest point in normal operation, at the level of the sensor 45, reached.

Im folgenden wird der Betrieb der ersten Ausführungsform der erfindungsgemäßen Vorrichtung anhand der Figuren 1 und 2 erläutert. Die Abzugseinrichtung 67a, 67b zieht an dem Folienmaterial 15 in Pfeilrichtung 5 aufgrund des Reibschlusses, der zwischen der Abzugseinrichtung und der Folie vorliegt. Bei stehender Vorratsrolle 1 bewegt sich durch diese Abzugskraft die Sensorwalze 21 in den Führungen 41a und 41b nach oben. Erreicht die Sensorwalze 21 die Höhe des oberen optischen Sensors (wie es z.B. in Figur 2c gezeigt ist), so löst der Auslöser 39 die Lichtschranke 45 aus. Diese gibt ein Signal an die Steuerung 9, die wiederum den Motor 3 der Vorratsrolle 1 anschaltet, so daß sich die Vorratsrolle 1 in Richtung 7 dreht. Auf diese Weise wird neues Folienmaterial 15 zugeführt und die Sensorwalze 21 bewegt sich in den Führungen 41a, 41b nach unten. Erreicht der Auslöser 39 den Sensor 47, so wird diese Lichtschranke ausgelöst. Ein Signal wird an die Steuerung 9 gegeben, den Motor 3 der Vorratsrolle 9 abzuschalten, so daß die weitere Folienzuführung unterbleibt (Figur 2a). Durch den weiterlaufenden Abzugsbetrieb der Abzugseinrichtung 67a, 67b bewegt sich dementsprechend die Sensorwalze 21 wieder nach oben, wie es in Figur 2b dargestellt ist. Bei Erreichen der Höhe des Sensors 45 wird, wie oben beschreiben, wiederum der Motor 3 der Vorratsrolle 1 eingeschaltet.In the following, the operation of the first embodiment of the invention Device explained with reference to Figures 1 and 2. The discharge device 67a, 67b pulls on the film material 15 in the direction of arrow 5 due to the frictional engagement, the between the trigger and the film is present. With standing supply roll 1 moved by this withdrawal force, the sensor roller 21 in the guides 41 a and 41b upwards. If the sensor roller 21 reaches the height of the upper optical sensor (as shown for example in Figure 2c), the trigger 39 triggers the photocell 45 from. This gives a signal to the controller 9, which in turn the motor 3 of the supply roll. 1 turns on, so that the supply roll 1 rotates in the direction 7. This way will fed new film material 15 and the sensor roller 21 moves in the guides 41a, 41b down. When the trigger 39 reaches the sensor 47, it becomes Photocell triggered. A signal is given to the controller 9, the motor 3rd Turn off the supply roll 9, so that the further film supply is omitted (FIG 2a). Moved by the ongoing withdrawal operation of the discharge device 67a, 67b Accordingly, the sensor roller 21 back up, as shown in FIG 2b is shown. Upon reaching the height of the sensor 45, as described above, turn the motor 3 of the supply roll 1 turned on.

Die Abzugseinrichtung 67a, 67b kann dabei kontinuierlich betrieben werden oder taktweise. Bei taktweisem Betrieb bewegt sich die Sensorwalze 21 auch taktweise während ihrer Bewegung nach oben.The discharge device 67a, 67b can be operated continuously or in cycles. In cyclic operation, the sensor roller 21 also moves in cycles while moving upwards.

Ist die Vorratsrolle 1 vollständig abgewickelt, so kann auch beim Betrieb des Motors 3 keine weitere Folie zugeführt werden. Die Abzugseinrichtung 67a, 67b arbeitet jedoch weiter. Die Sensorwalze 21 bewegt sich nach oben. Der Auslöser 39 passiert die Lichtschranke 45. Es kann jedoch keine weitere Folie nachgeliefert werden. Die Sensorwalze 21 bewegt sich dementsprechend weiter nach oben. Erreicht sie einen oberen Sicherheitssensor 43, wiederum z.B. eine Lichtschranke, so wird ein Fehlersignal erzeugt und alle Komponenten der Folienzuführeinrichtung einschließlich der Abzugsvorrichtung 67a, 67b werden abgeschaltet. Es kann z.B. ein akustisches und optisches Signal zusätzlich erzeugt werden, das das Bedienungspersonal darauf hinweist, daß eine neue Vorratsrolle 1 eingelegt werden muß. Der Sicherheitssensor 43 spricht natürlich auch an, wenn aufgrund einer anderen Fehlfunktion die Folienzulieferung unterbrochen ist, z.B. wenn die Vorratsrolle verklemmt ist.If the supply roll 1 is completely unwound, it is also possible during operation of the engine 3 no further film is supplied. The take-off device 67a, 67b, however, works further. The sensor roller 21 moves upward. The trigger 39 passes the Photocell 45. However, no further foil can be supplied. The sensor roller 21 moves accordingly upwards. If she reaches an upper one Security sensor 43, again e.g. a photocell, then becomes an error signal generated and all components of the Folienzuführeinrichtung including the trigger device 67a, 67b are turned off. It can e.g. an acoustic and optical signal can be generated in addition, the operator on it indicates that a new supply roll 1 must be inserted. The safety sensor Of course, 43 also responds when, due to another malfunction, the film delivery is interrupted, e.g. if the supply roll is jammed.

Andererseits kann eine Fehlfunktion der Steuerung 9 bzw. des Motors 3 dazu führen, daß die Vorratsrolle 1 nicht rechtzeitig abgeschaltet wird, wenn die Sensorwalze 21 mit dem Auslöser 39 den Sensor 47 passiert. Die Sensorwalze 21 geht dann weiter in den Führungen 41 a, 41 b nach unten bis zu einem unteren Sicherheitssensor 49, z.B. wiederum z.B. eine Lichtschranke. Diese Lichtschranke sendet ein Signal aus, das die komplette Anlage einschließlich der Vorratsrolle 1 und der Abzugseinrichtung 67a, 67b abschaltet, z.B. durch Unterbrechen der Stromzufuhr. Weiterhin kann wiederum ein akustisches oder optisches Signal gegeben werden, das das Bedienungspersonal auf die entsprechende Fehlfunktion hinweist. Der Sensor 49 tritt auch in Aktion, wenn z.B. das Folienmaterial 15 vor Erreichen der Sensorwalze 21 zerrissen ist. Auch dann bewegt sich die Sensorwalze 21 abwärts an dem Sensor 47 vorbei bis zum Sensor 49 und das Bedienungspersonal kann durch das Fehlersignal gewarnt werden. Am unteren Ende der Führungsschienen 41a, 41b oder an einer entsprechend vorgesehenen Auflage wird die Sensorwalze 21 in ihrer Abwärtsbewegung gestoppt.On the other hand, a malfunction of the controller 9 or of the motor 3 can lead to that the supply roll 1 is not switched off in time when the sensor roller 21st with the trigger 39 passes the sensor 47. The sensor roller 21 then continues in the guides 41 a, 41 b down to a lower security sensor 49, e.g. again, e.g. a photocell. This photocell emits a signal that the complete system including the supply roll 1 and the withdrawal device 67a, 67b turns off, e.g. by interrupting the power supply. Furthermore, in turn an audible or visual signal is given to the operating personnel indicates the corresponding malfunction. The sensor 49 also comes into action if e.g. the film material 15 is torn before reaching the sensor roller 21. Even then, the sensor roller 21 moves downward past the sensor 47 until to the sensor 49 and the operator can be warned by the error signal become. At the lower end of the guide rails 41a, 41b or at a corresponding provided support the sensor roller 21 in its downward movement stopped.

Im folgenden wird der Aufbau und der Betrieb einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung anhand der Figuren 3 und 4 beschrieben. Die gezeigte Ausführungsform weist zwei parallel verlaufende Folienstränge auf, die vor der Abzugseinrichtung 68, 70 zusammengeführt werden. Derartige parallele Folienzuführungen sind z.B. nötig, wenn zwei Folien miteinander verschweißt werden, z.B. um Folienbeutel zu bilden. Bei dieser Anwendung können die Folien z.B. Aluminiumlaminatfolien sein. Stromaufwärts der Abzugseinrichtung 68, 70 oder auch stromabwärts davon kann dazu z.B. eine nicht gezeigte Schweißeinrichtung vorgesehen sein.In the following, the construction and operation of another embodiment of the Device according to the invention described with reference to Figures 3 and 4. The shown Embodiment has two parallel film strands, which before the Discharge device 68, 70 are brought together. Such parallel film feeds are e.g. necessary if two foils are welded together, e.g. around To form foil bag. In this application, the films may be e.g. Aluminum laminate films his. Upstream of the discharge device 68, 70 or downstream of which, e.g. a welding device not shown may be provided.

In Figur 3 bezeichnen 2, 4 die zwei Vorratsrollen mit den jeweiligen Durchmessern D1 und D2 Zuführung des Folienmaterials 16, 18. Die Bewegung der Vorratsrollen wird durch Motoren 6, 8 ausgelöst und geschieht in Richtung 7. Gesteuert werden die Motoren 6, 8 durch eine Steuerung 10 über Signalleitungen 12, 14. Die Folien 16 bzw. 18 laufen in die Verbrauchssensoren 80, 82 ein. Dabei laufen die Folien 16 bzw. 18 um feststehende Umlenkrollen 20 bzw. 24 und bewegliche Sensorwalzen 22 bzw. 26. Bei der Ausführungsform, die in Figur 3 gezeigt ist, umfaßt jeder Verbrauchssensor 80, 82 jeweils drei feststehende Umlenkrollen 20 bzw. 24 und zwei bewegliche Sensorwalzen 22 bzw. 26. Die beweglichen Sensorwalzen 22 bzw. 26 sind jeweils untereinander durch Verbindungen 40 bzw. 42 verbunden, so daß die senkrechte Bewegung der Sensorwalzen 22 bzw. 26 jedes Verbrauchssensors 80 bzw. 82 gleichzeitig erfolgt. Die senkrechten Bewegungen der Sensorwalzen 22, 26 sind durch Pfeile 36, 38 angedeutet. 44 und 50 bezeichnen die Sicherheitssensoren des oberen Verbrauchssensors 80 und 60, 66 die Sicherheitssensoren des unteren Verbrauchssensors 82. 46 und 48 bezeichnen die Sensoren am oberen und unteren Auslenkungspunkt der Sensorwalzen 22 des Verbrauchssensors 80 und 62, 64 die entsprechenden Sensoren des unteren Vorratssensors 82. Die optischen Sensoren sind dabei z.B. als Lichtschranken ausgebildet. Nicht gezeigt in Figur 3 sind die Signalleitungen, die die einzelnen Lichtschranken mit der Steuerung 10 für die Motoren 6, 8 der Vorratsrollen 2, 4 verbinden. 28, 30 bezeichnen Umlenkrollen für die einzelnen Folien 16, 18, bevor diese von der gemeinsamen Abziehvorrichtung 68, 70 abgezogen werden, die durch den Motor 72 angetrieben wird. 32, 34 bezeichnen feststehende Halterungen für die Umlenkrollen 20 bzw. 24 der einzelnen Verbrauchssensoren.2, 4 designate the two supply rolls with the respective diameters D 1 and D 2 feeding the film material 16, 18. The movement of the supply rolls is triggered by motors 6, 8 and takes place in direction 7. The motors 6, 8 are controlled by a controller 10 via signal lines 12, 14. The films 16 and 18 run into the consumption sensors 80, 82 a. In this case, the films 16 and 18 run around fixed deflection rollers 20 and 24 and movable sensor rollers 22 and 26. In the embodiment shown in Figure 3, each consumption sensor 80, 82 each comprise three fixed deflection rollers 20 and 24 and two movable sensor rollers 22 and 26. The movable sensor rollers 22 and 26 are each interconnected by connections 40 and 42, so that the vertical movement of the sensor rollers 22 and 26 of each consumption sensor 80 and 82 takes place simultaneously. The vertical movements of the sensor rollers 22, 26 are indicated by arrows 36, 38. 44 and 50, the safety sensors of the upper consumption sensor 80 and 60, 66 denote the safety sensors of the lower consumption sensor 82. 46 and 48, the sensors at the upper and lower deflection points of the sensor rollers 22 of the consumption sensor 80 and 62, 64, the corresponding sensors of the lower storage sensor 82nd The optical sensors are designed, for example, as light barriers. Not shown in Figure 3 are the signal lines that connect the individual photocells with the controller 10 for the motors 6, 8 of the supply rolls 2, 4. 28, 30 denote pulleys for the individual sheets 16, 18 before they are withdrawn from the common puller 68, 70 which is driven by the motor 72. 32, 34 denote fixed supports for the deflection rollers 20 and 24 of the individual consumption sensors.

Figur 4 zeigt den Verbrauchssensor 80 im Detail. Der Aufbau des Verbrauchssensors 82 ist identisch. Sowohl die Verbrauchssensoren 80, 82 als auch die Motoren 6,8 der einzelnen Folienstränge arbeiten unabhängig voneinander. Figur 4 zeigt die Signalwege 52, 58, die von den optischen Sicherheitssensoren 44, 50 zu einem Fehlersignal F führen, wenn die Verbindung 40 zwischen ihnen an den Sicherheitssensoren 44 bzw. 50 vorbeigeht. Die Funktionsweise der optischen Sicherheitssensoren zur Abschaltung der entsprechenden Betriebskomponenten entspricht dabei der ersten Ausführungsform, die oben beschrieben ist. Ebenso zeigt Figur 4 die Signalwege 54, 56 der Sensoren 46, 48, die zur An- bzw. Abschaltung des Motores 6 der Vorratsrolle 2 in Figur 3 führen. Vergleichbar mit der ersten Ausführungsform wird der Motor 6 der Vorratsrolle 2 angeschaltet, wenn die Höhe der Sensorwalze 22 den optischen Sensor 46 passiert, und der Motor 6 wird abgeschaltet, wenn die Höhe der Sensorwalze 22 den Sensor 48 passiert. Durch die Anordnung der feststehenden Umlenkwalzen 20 und der Sensorwalzen 22 und durch das Vorsehen von drei Umlenkwalzen 20 und zwei Sensorwalzen 22 ist eine sichere Führung der Folie gewährleistet, da die Lage der Sensorwalzen 22 selbststabilisierend ist.FIG. 4 shows the consumption sensor 80 in detail. The structure of the consumption sensor 82 is identical. Both the consumption sensors 80, 82 and the motors 6.8 of the individual foil strands work independently of each other. FIG. 4 shows the signal paths 52, 58, from the optical safety sensors 44, 50 to an error signal F lead when the connection 40 between them on the safety sensors 44 or 50 passes by. The operation of the optical safety sensors for Shutdown of the corresponding operating components corresponds to the first Embodiment described above. Likewise, FIG. 4 shows the signal paths 54, 56 of the sensors 46, 48, the on or off of the engine 6 of the supply roll 2 in Figure 3 lead. Similar to the first embodiment, the engine 6 is the Supply roll 2 is turned on when the height of the sensor roller 22, the optical sensor 46 happens, and the motor 6 is turned off when the height of the sensor roller 22 passes the sensor 48. Due to the arrangement of the fixed guide rollers 20 and the sensor rollers 22 and by the provision of three guide rollers 20th and two sensor rollers 22 ensures a secure guidance of the film, as the Position of the sensor rollers 22 is self-stabilizing.

Ebenso wie bei der zweiten Ausführung kann auch die erste Ausführungsform der Figuren 1 und 2 zur Zuführung mehrerer Folienstränge eingesetzt werden, wenn eine entsprechende Anzahl von Verbrauchssensoren vorgesehen ist. Andererseits kann auch ein einzelner Verbrauchssensor, wie er z.B. in Figur 4 gezeigt ist und in zweifacher Ausführung in der Figur 3 dargestellt ist, für die Zuführung eines einzelnen Folienstranges eingesetzt werden.Just as in the second embodiment, the first embodiment of the Figures 1 and 2 are used for feeding a plurality of film strands, if a corresponding number of consumption sensors is provided. On the other hand can also a single consumption sensor, as e.g. is shown in Figure 4 and in duplicate Embodiment shown in Figure 3, for the supply of a single sheet strand be used.

Bei Zuführung mehrerer Folienstränge, die z.B. Seitenfolien und Bodenfolie eines Standbeutels bilden, kann eine entsprechend höhere Anzahl von Verbrauchssensoren vorgesehen sein.When feeding a plurality of film strands, e.g. Side foils and bottom foil of one Stand bag can form, a correspondingly higher number of consumption sensors be provided.

In der obigen Beschreibung wurde ein Betrieb beschrieben, in dem bei Überschreiten eines vorgegebenen Abstandes der Sensorwalze die Vorratsrolle vollständig angehalten wird bzw. bei Unterschreiten eines weiteren vorgegebenen Abstandes der Sensorwalze die Vorratsrolle wieder angetrieben wird. Abweichend hiervon kann vorgesehen sein, daß die Vorratsrolle nicht vollständig abgeschaltet, sondern nur verlangsamt wird, wenn die Sensorwalze einen vorgegebenen Abstand überschreitet, bzw. bei Unterschreiten eines weiteren vorgegebenen Abstandes die Vorratsrolle beschleunigt wird. Dies kann vorteilhaft sein, wenn besonders große und dementsprechend schwere Vorratsrollen eingesetzt werden.In the above description, an operation has been described in which when exceeded a predetermined distance of the sensor roller, the supply roll completely stopped is or falls below a further predetermined distance of the Sensor roller, the supply roll is driven again. Deviating from this can be provided be that the supply roll is not completely off, but only slowed down is when the sensor roller exceeds a predetermined distance, or when falling below a further predetermined distance, the supply roll is accelerated. This can be beneficial if especially large and accordingly heavy supply rolls are used.

Sowohl bei der ersten als auch bei der zweiten beschriebenen Ausführungsform wird die Abwärtsbewegung der Sensorwalzen 21, 22 während des Folienzuführbetriebes durch ihr Eigengewicht ausgelöst. Durch Einstellung des Gewichtes der Sensorwalze bzw. durch entsprechende Zusatzgewichte kann dabei die Spannung des folienmaterials eingestellt werden.Both in the first and in the second described embodiment the downward movement of the sensor rollers 21, 22 during the Folienzuführbetriebes triggered by their own weight. By adjusting the weight of the sensor roller or by appropriate additional weights can thereby the tension of the film material be set.

Da die Sensorwalze nur mit ihrem Gewicht oder einem entsprechenden Zusatzgewicht auf der jeweiligen Folie lastet, ist die ausgeübte Kraft konstant und die Spannung der Folie vor der Abzugseinrichtung 67a, 67b, 68, 70 ist konstant. So wird eine hochpräzise Zuführung des Folienmaterials gewährleistet, die auch bei sehr hohen Betriebsgeschwindigkeiten möglich ist, die in Folienverarbeitungslinien heutzutage üblich sind.Since the sensor roller only with their weight or a corresponding additional weight on the respective foil, the applied force is constant and the voltage the film in front of the discharge device 67a, 67b, 68, 70 is constant. So will one ensures high-precision feeding of the film material, even at very high Operating speeds are possible in film processing lines nowadays are common.

Claims (23)

  1. A foil supply apparatus for supplying foil for producing foil bags, comprising a motor-driven supply roll (1, 2, 4) for supplying foil material (15, 16, 18) with a supply capacity, a withdrawal means (67a, 67b, 68, 70) for withdrawing the foil material with a withdrawal capacity, and a consumption sensor (80, 81, 82) arranged between the supply roll (1, 2, 4) and the withdrawal means (67a, 67b, 68, 70), with the help of which the drive of the supply roll (1, 2, 4) is controlled in dependency of the consumption of foil material, said consumption sensor (80, 81, 82) comprising the following means:
    at least one stationary deflection roller (19, 20, 24),
    at least one sensor roller (21, 22, 24) which is so supported and arranged that it changes its distance from the at least one deflection roller (19, 20, 24) in accordance with the difference between supply capacity and withdrawal capacity of foil material (15, 16, 18) and makes sure that there is a constant tension in the foil material in front of the withdrawal means, and
    a sensor means which senses the change in distance and increases the speed of the drive (3, 6, 8) of the supply roll (1, 2, 4) when the distance is smaller than a first predetermined distance, and which reduces the speed of the drive when a second predetermined distance is exceeded, comprising
    a first safety sensor (43, 44, 60) which produces an error signal when the at least one sensor roller (21, 22, 26) has a distance smaller than a minimum distance from the at least one deflection roller (19, 20, 24), and
    a second safety sensor (49, 50, 66) which produces an error signal when the at least one sensor roller (21, 22, 26) exceeds a maximum distance from the at least one deflection roller (19, 20, 24).
  2. The apparatus according to claim 1,
    characterized in that the sensor means is designed such that it switches off when the predetermined distance (3, 6, 8) of the supply roll (1, 2, 4) is exceeded.
  3. The apparatus according to any one of claims 1 and 2,
    characterized by
    a guide means (21 a, 21 b) along which the at least one sensor roller (21, 22, 26) is moved while the distance is changed.
  4. The apparatus according to claim 3,
    characterized in that the guide means is substantially oriented in vertical direction.
  5. The apparatus according to any one of claims 1 to 4,
    characterized in that the sensor roller (21, 22, 26) is loaded with an additional weight.
  6. The apparatus according to any one of claims 1 to 5,
    characterized in that the number of the stationary deflection rolls (19, 20, 24) exceeds the number of the sensor rollers (21, 22, 26) by the number one and the foil material is alternately placed around the deflection rollers and the at least one sensor roller.
  7. The apparatus according to claim 6,
    characterized in that there are provided at least two sensor rollers (22, 26) that are connected to each other.
  8. The apparatus according to any one of claims 1 to 7,
    characterized in that the sensor means comprises a first sensor (45, 46, 62) which outputs a signal for accelerating the drive (3, 6, 8) when the distance of the at least one sensor roller (21, 22, 26) from the at least one deflection roller (19, 20, 24) is smaller than a first predetermined distance.
  9. The apparatus according to any one of claims 1 to 8,
    characterized in that the sensor means comprises a second sensor (47, 48, 64) which outputs a signal for slowing down the drive when the distance of the at least one sensor roller (21, 22, 26) from the at least one deflection roller (19, 20, 24) exceeds the second predetermined distance.
  10. The apparatus according to any one of claims 1 to 9,
    characterized in that the safety sensor comprises a proximity switch.
  11. The apparatus according to any one of claims 1 to 9,
    characterized in that the safety sensor comprises an optical sensor element.
  12. The apparatus according to any one of claims 1 to 11,
    characterized in that at least one of the first and second sensors comprises a proximity switch.
  13. The apparatus according to any one of claims 1 to 12,
    characterized in that at least one of the first and second sensors comprises an optical sensor element.
  14. The apparatus according to any one of claims 11 and 13,
    characterized in that the optical sensor element comprises a light barrier.
  15. The apparatus according to any one of claims 1 to 14,
    characterized in that the error signal is at least used for switching off the withdrawal device (67a, 67b, 68, 70) and operational components that are used for the further processing of the foil supplied.
  16. The apparatus according to any one of claims 1 to 15,
    characterized in that the withdrawal means (67a, 67b, 68, 70) is intermittently driven.
  17. The apparatus according to any one of claims 1 to 16,
    characterized in that at least two motor-driven supply rolls (2, 4) and consumption sensors (80, 82) are provided so that at least two foil webs (16, 18) can be supplied.
  18. The apparatus according to claim 17,
    characterized in that the motors (6, 8) of the supply rolls (2, 4) are driven by a joint control unit (10) which receives the signals of the sensor means of the corresponding consumption sensors (80, 82).
  19. A method for supplying foil material in the production of foil bags, wherein foil material (15, 16, 18) is supplied from a motor-driven supply roll (1, 2), subsequently guided around at least one stationary deflection roller (19, 20, 24) and at least one sensor roller (21, 22, 26), which ensures a constant tension in the foil material and whose distance from the at least one deflection roller is variable, and is finally withdrawn by a withdrawal means (67a, 67b, 68, 70),
    the speed of the drive (3, 6, 8) of the supply roll being increased when the distance of the sensor roller from the deflection roller has a distance smaller than a predetermined first distance,
    the speed of the drive (3, 6, 8) being decreased when the distance of the sensor roller from the deflection roller exceeds a second predetermined distance,
    an error signal being produced by a first safety sensor when the at least one sensor roller has a distance smaller than a minimum distance from the at least one deflection roller, and
    an error signal being produced by a second safety sensor when the at least one sensor roller exceeds a maximum distance from the at least one deflection roller.
  20. The method according to daim 19,
    characterized in that the drive of the supply roll (1, 2, 4) is switched off when the distance of the sensor roller from the deflection roller exceeds the second predetermined distance.
  21. The method according to any one of claims 19 to 20,
    characterized in that when the minimum distance of the sensor roller from the defection roller is exceeded, at least the withdrawal means (67a, 67b, 68, 70) and the operational components are switched off that are used for the further processing of the foil.
  22. The method according to any one of claims 19 to 21,
    characterized in that when a maximum distance is exceeded, at least the drive (3, 6, 8) of the supply roll, the withdrawal means (67a, 67b, 68, 70) as well as the operational components for the further processing of the foil are switched off.
  23. The method according to any one of claims 19 to 22,
    characterized in that the foil is intermittently withdrawn by the withdrawal means (67a, 67b, 68, 70).
EP99107471A 1998-06-03 1999-04-29 Device and method for feeding film Expired - Lifetime EP0962412B1 (en)

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DE19824798A DE19824798A1 (en) 1998-06-03 1998-06-03 Device and method for feeding foils
DE19824798 1998-06-03

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CA2273395A1 (en) 1999-12-03
JP3784996B2 (en) 2006-06-14
EP0962412A2 (en) 1999-12-08
HUP9901834A3 (en) 2001-01-29
TW438702B (en) 2001-06-07
CA2273395C (en) 2003-01-07
SI0962412T1 (en) 2004-04-30
BG103447A (en) 1999-12-30
KR100317004B1 (en) 2001-12-22
SA99200494B1 (en) 2006-10-11
ID22731A (en) 1999-12-09
SA04250018B1 (en) 2008-01-13
ATE255056T1 (en) 2003-12-15
HUP9901834A2 (en) 2000-06-28
CN1131162C (en) 2003-12-17
TR199901229A2 (en) 1999-12-21
CZ298778B6 (en) 2008-01-23
UA61087C2 (en) 2003-11-17
CZ192199A3 (en) 2000-01-12
HRP990165A2 (en) 2000-10-31
DK0962412T3 (en) 2004-03-29
US20010013561A1 (en) 2001-08-16
DE19824798A1 (en) 1999-12-09
BG64001B1 (en) 2003-09-30
DE59907834D1 (en) 2004-01-08
US6340130B2 (en) 2002-01-22
CN1242328A (en) 2000-01-26
ZA993716B (en) 1999-12-02
EP0962412A3 (en) 2000-07-05
RU2167798C2 (en) 2001-05-27
ES2210885T3 (en) 2004-07-01
JP2000016653A (en) 2000-01-18
PT962412E (en) 2004-04-30
PL190254B1 (en) 2005-11-30
KR20000005847A (en) 2000-01-25
BR9902930A (en) 2000-03-21
PL333523A1 (en) 1999-12-06
TR199901229A3 (en) 1999-12-21
HU9901834D0 (en) 1999-08-30
YU23999A (en) 2001-03-07
HK1024213A1 (en) 2000-10-05
SK73399A3 (en) 1999-12-10

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