EP0108329B1 - Device for controlling the presence of a fabric web - Google Patents

Device for controlling the presence of a fabric web Download PDF

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Publication number
EP0108329B1
EP0108329B1 EP83110636A EP83110636A EP0108329B1 EP 0108329 B1 EP0108329 B1 EP 0108329B1 EP 83110636 A EP83110636 A EP 83110636A EP 83110636 A EP83110636 A EP 83110636A EP 0108329 B1 EP0108329 B1 EP 0108329B1
Authority
EP
European Patent Office
Prior art keywords
roller
strip
web
tear tape
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83110636A
Other languages
German (de)
French (fr)
Other versions
EP0108329A1 (en
Inventor
Siegfried Knecht
Jürgen Wiesejahn
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.)
Maschinenfabrik Alfred Schmermund GmbH and Co
Original Assignee
Maschinenfabrik Alfred Schmermund GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Alfred Schmermund GmbH and Co filed Critical Maschinenfabrik Alfred Schmermund GmbH and Co
Publication of EP0108329A1 publication Critical patent/EP0108329A1/en
Application granted granted Critical
Publication of EP0108329B1 publication Critical patent/EP0108329B1/en
Expired legal-status Critical Current

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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
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
    • 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
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely

Definitions

  • the invention relates to a device for checking the presence of a product web, in particular a strip of thin, crystal-clear film, according to the preamble of claim 1.
  • a device for checking the presence of a product web in particular a strip of thin, crystal-clear film, according to the preamble of claim 1.
  • Such a device is known from DE-C 736136.
  • cigarette packs are wrapped in cellophane or polypropylene films, which are provided with a tear tape.
  • This tear tape is usually made of crystal-clear material. It is brought together with the film in the wrapping machine and welded or glued to it. If the tear tape breaks so that faulty wrappings would result, the wrapping machine is stopped. A tear of the tear tape can easily occur when it is fed to the wrapping film, e.g. by means of a dancer roller connected to a suitable sensor.
  • the object of the invention is therefore to provide a device according to the preamble of claim 1, which can easily detect the presence of a web, in particular a thin, crystal-clear ribbon, in a desired position.
  • a film web 2 provided with a tear tape 1 is normally fed via a deflection roller 3, rollers 4 and 5 serving for the preference of the film web 2.
  • rollers 8 and 9 of the same diameter are mounted independently of one another on needle bolts 10 on a bolt 10a in a fork-shaped lever 7 pivotable about a bolt 6.
  • a ring 11 prevents the transmission of the rotation from the roll 8, which rolls on the tear tape 1, to the roll 9.
  • the distance between the circumference of the roll 9 and the film web 2 corresponds to the thickness of the tear tape 1, which is approximately 4/100 is up to 5/100 mm. However, this distance is sufficient to let the roller 9 stand still.
  • both rollers 8, 9 are pressed against the film web 2; this causes a spring 12 which engages the lever 7. If the tear tape runs to the right, it gets under the roller 9, which begins to rotate in both cases.
  • the roller 9 is laterally provided in the circumferential direction with markings 15, the spacing of which is not equal to the spacing of the photocells 14. The reason for this is that a photocell 14, when the border between the marking and the roller 9 happens to be in front of it, emit an alternating signal and can thus incorrectly simulate the rotation of the roller 9. However, the second photocell 14 is then certainly not on such a boundary. Only when both photocells 14 give an alternating signal is it clearly recognized that the roller 9 is rotating, and an error message is then generated and / or the machine is stopped by means of a suitable device (not shown).
  • the device can also be used to control an individually conveyed web of material, since it does not matter whether the roll 9 rolls on a film web 2 or directly on the roll 3.
  • the photocells 14 and the optically recognizable markings 15 can also be used to distinguish between the idle and moving state of the roller 9, e.g. B. capacitive or inductive transducers can be used, while the roller 9 made of non-conductive material marks made of conductive or ferromagnetic Wear material.
  • the markings 15 can also be arranged over the circumference of the roller 9, the photocells 14 or sensors are then to be arranged accordingly and, if necessary, can also be pivoted with the lever 7.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Controlling Sheets Or Webs (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Kontrolle der Anwesenheit einer Warenbahn, insbesondere eines Streifens aus dünner glasklarer Folie, nach dem Oberbegriff des Anspruchs 1. Eine solche Vorrichtung ist durch die DE-C 736136 bekannt.The invention relates to a device for checking the presence of a product web, in particular a strip of thin, crystal-clear film, according to the preamble of claim 1. Such a device is known from DE-C 736136.

Zigarettenpackungen werden bekanntlich in Zellglas- oder Polypropylenfolien eingehüllt, welche mit einem Aufreissbändchen versehen sind. Dieses Aufreissbändchen besteht meist aus glasklarem Material. Es wird in der Einhüllmaschine mit der Folie zusammengeführt und mit dieser verschweisst oder verklebt. Wenn das Aufreissbändchen reisst, so dass fehlerhafte Umhüllungen entstehen würden, wird die Einhüllmaschine stillgesetzt. Ein Reissen des Aufreissbändchens kann bei dessen Zufuhr zur Einhüllfolie leicht, z.B. durch eine mit einem geeigneten Fühler verbundene Tänzerwalze, festgestellt werden.As is known, cigarette packs are wrapped in cellophane or polypropylene films, which are provided with a tear tape. This tear tape is usually made of crystal-clear material. It is brought together with the film in the wrapping machine and welded or glued to it. If the tear tape breaks so that faulty wrappings would result, the wrapping machine is stopped. A tear of the tear tape can easily occur when it is fed to the wrapping film, e.g. by means of a dancer roller connected to a suitable sensor.

Fehlerhaft Umhüllungen entstehen jedoch auch, wenn das Aufreissbändchen seitlich verläuft und somit, da es dann an der Klebe- bzw. Schweissvorrichtung vorbeiläuft, nicht mit der Folie verbunden wird. Dies zu kontrollieren, ist jedoch nur schwer möglich, da ein glasklares Bändchen von einer Fotozelle nicht erfassbar ist, weshalb bisher in der Zigarettenindustrie auf eine automatische Kontrolle verzichtet wird, sie wird durch das Bedienungspersonal durchgeführt. Da das Personal jedoch auch noch andere Aufgaben zu erfüllen hat, werden öfters mehrere fehlerhafte Packungen hergestellt.Faulty wrappings also occur, however, if the tear tape runs laterally and therefore, since it then runs past the adhesive or welding device, is not connected to the film. However, it is difficult to check this, since a crystal-clear ribbon cannot be detected by a photocell, which is why an automatic control has so far been dispensed with in the cigarette industry; it is carried out by the operating personnel. However, since the personnel also have other tasks to perform, several faulty packs are often produced.

Aus der DE-C-736136 ist es bekannt, zur Steuerung der Kanten einer Gewebe- oder Papierbahn unabhängig voneinander gelagerte Rollen nebeneinander anzuordnen, unter denen sich die Warenbahn bewegt. Die Rollen geben Kontakt zu einzelnen Kontaktelementen, wodurch bei Abwesenheit der Warenbahn unter mindestens einer Rolle ein Fehlersignal ausgelöst wird, das dazu führt, dass die Warenbahn mit ihrer Kante unter gleichzeitiger Herabsetzung der Vorschubgeschwindigkeit entsprechend seitlich verschoben wird. Für ein Aufreissbändchen, das mit einer weiteren Warenbahn verbunden ist, würde diese Kontrolle jedoch nicht funktionieren, während bei einer einzelnen Bahn, wenn diese über eine Walze geführt wird, Schwierigkeiten hinsichtlich der Kontaktierung und des Abgreifens des Signals entstehen würden.From DE-C-736136 it is known for the control of the edges of a web of tissue or paper to independently arrange rolls which are mounted independently of one another and under which the web of goods moves. The rollers make contact with individual contact elements, whereby in the absence of the web under at least one roller an error signal is triggered, which leads to the edge of the web being correspondingly shifted while simultaneously reducing the feed speed. However, this control would not work for a tear tape connected to another web, whereas for a single web, if it is passed over a roller, difficulties would arise in terms of contacting and tapping the signal.

Aufgabe der Erfindung ist es daher, eine Vorrichtung nach dem Oberbegriff des Anspruchs 1 zu schaffen, welche das Vorhandensein einer Warenbahn, insbesondere eines dünnen, glasklaren Bändchens, in einer gewünschten Position auf einfache Weise erfassen kann.The object of the invention is therefore to provide a device according to the preamble of claim 1, which can easily detect the presence of a web, in particular a thin, crystal-clear ribbon, in a desired position.

Diese Aufgabe wird entsprechend dem kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved in accordance with the characterizing part of claim 1.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention can be found in the following description and the subclaims.

Eine bevorzugte Ausführung der Erfindung wird im Folgenden anhand der beigefügten Abbildungen näher beschrieben.

  • Fig. 1 zeigt eine Seitenansicht von Zuführungsrollen für die Zufuhr von mit einem Aufreissbändchen versehener Folie zu einer Umhüllungsmaschine mit der erfindungsgemässen Vorrichtung.
  • Fig. 2 zeigt eine Draufsicht auf die Zuführungsrolle von Fig. 1 mit der erfindungsgemässen Vorrichtung, wobei Folie und Aufreissbändchen stark vergrössert gezeichnet sind.
A preferred embodiment of the invention is described below with reference to the accompanying figures.
  • 1 shows a side view of feed rollers for feeding film provided with a tear tape to a wrapping machine with the device according to the invention.
  • FIG. 2 shows a top view of the feed roller of FIG. 1 with the device according to the invention, the film and tear tape being drawn in a greatly enlarged manner.

In Umhüllungsmaschinen etwa von Zigarettenverpackungsanlagen wird eine mit einem Aufreissbändchen 1 versehene Folienbahn 2 normalerweise über eine Umlenkrolle 3 zugeführt, wobei Rollen 4 und 5 dem Vorzug der Folienbahn 2 dienen. Um die Anwesenheit des Aufreissbändchens 1 zu erkennen, sind in einem um einen Bolzen 6 schwenkbaren, gabelförmigen Hebel 7 Rollen 8 und 9 gleichen Durchmessers unabhängig voneinander über Nadellager 10 auf einem Bolzen 10a gelagert. Ein Ring 11 verhindert die Übertragung der Drehung von der Rolle 8, welche auf dem Aufreissbändchen 1 abrollt, auf die Rolle 9. Der Abstand zwischen dem Umfang der Rolle 9 und der Folienbahn 2 entspricht der Dicke des Aufreissbändchens 1, welche ca. 4/100 bis 5/100 mm beträgt. Dieser Abstand genügt jedoch, um die Rolle 9 stillstehen zu lassen.In wrapping machines, for example of cigarette packaging systems, a film web 2 provided with a tear tape 1 is normally fed via a deflection roller 3, rollers 4 and 5 serving for the preference of the film web 2. In order to recognize the presence of the tear tape 1, rollers 8 and 9 of the same diameter are mounted independently of one another on needle bolts 10 on a bolt 10a in a fork-shaped lever 7 pivotable about a bolt 6. A ring 11 prevents the transmission of the rotation from the roll 8, which rolls on the tear tape 1, to the roll 9. The distance between the circumference of the roll 9 and the film web 2 corresponds to the thickness of the tear tape 1, which is approximately 4/100 is up to 5/100 mm. However, this distance is sufficient to let the roller 9 stand still.

Fehlt nun das Aufreissbändchen 1 oder ist es nach links (in Fig. 2) verlaufen, so werden beide Rollen 8, 9 gegen die Folienbahn 2 gedrückt; dies bewirkt eine Feder 12, die am Hebel 7 angreift. Verläuft das Aufreissbändchen nach rechts, so gerät es unter die Rolle 9, welche in beiden Fällen zu rotieren anfängt. Im Hebel 7 sind zwei Bohrungen 13 vorgesehen, vor denen je eine Fotozelle 14 angebracht ist. Die Rolle 9 ist seitlich im Umfangsrichtung mit Markierungen 15 versehen, deren Abstand ungleich dem Abstand der Fotozellen 14 ist. Das hat den Grund, dass eine Fotozelle 14, wenn zufällig die Grenze zwischen Markierung und Rolle 9 vor ihr steht, ein wechselndes Signal abgeben und so die Drehung der Rolle 9 fälschlicherweise simulieren kann. Die zweite Fotozelle 14 steht dann jedoch sicher nicht auf einer solchen Grenze. Erst wenn beide Fotozellen 14 wechselndes Signal geben, ist klar erkannt, dass sich die Rolle 9 dreht, und es wird dann mittels einer geeigneten (nicht dargestellten) Einrichtung eine Fehlermeldung erzeugt und/oder die Maschine stillgesetzt.If the tear tape 1 is missing or if it runs to the left (in FIG. 2), both rollers 8, 9 are pressed against the film web 2; this causes a spring 12 which engages the lever 7. If the tear tape runs to the right, it gets under the roller 9, which begins to rotate in both cases. In the lever 7 two holes 13 are provided, in front of which a photocell 14 is attached. The roller 9 is laterally provided in the circumferential direction with markings 15, the spacing of which is not equal to the spacing of the photocells 14. The reason for this is that a photocell 14, when the border between the marking and the roller 9 happens to be in front of it, emit an alternating signal and can thus incorrectly simulate the rotation of the roller 9. However, the second photocell 14 is then certainly not on such a boundary. Only when both photocells 14 give an alternating signal is it clearly recognized that the roller 9 is rotating, and an error message is then generated and / or the machine is stopped by means of a suitable device (not shown).

Natürlich kann die Vorrichtung auch zur Kontrolle einer einzeln geförderten Warenbahn verwendet werden, da es gleichgültig ist, ob die Rolle 9 auf einer Folienbahn 2 oder direkt auf der Rolle 3 abrollt.Of course, the device can also be used to control an individually conveyed web of material, since it does not matter whether the roll 9 rolls on a film web 2 or directly on the roll 3.

Anstelle der Fotozellen 14 und der optisch erkennbaren Markierungen 15 können auch andere Einrichtungen verwendet werden, um zwischen dem Ruhe- und Bewegungszustand der Rolle 9 zu unterscheiden, z. B. können kapazitiv oder induktiv arbeitende Aufnehmer verwendet werden, während die Rolle 9 aus nicht leitendem Material Markierungen aus leitendem oder ferromagnetischem Material tragen. Die Markierungen 15 können auch über den Umfang der Rolle 9 angeordnet sein, die Fotozellen 14 oder Aufnehmer sind dann entsprechend anzuordnen und können ggf. auch mit dem Hebel 7 verschwenkbar sein.Instead of the photocells 14 and the optically recognizable markings 15, other devices can also be used to distinguish between the idle and moving state of the roller 9, e.g. B. capacitive or inductive transducers can be used, while the roller 9 made of non-conductive material marks made of conductive or ferromagnetic Wear material. The markings 15 can also be arranged over the circumference of the roller 9, the photocells 14 or sensors are then to be arranged accordingly and, if necessary, can also be pivoted with the lever 7.

Claims (4)

1. An arrangement for registering the presence of a strip of material (1), particularly a thin glass- clearfoil strip which can be connected to a second, wider strip of material (2), wherein independently rotatably mounted rollers (8,9) are provided alongside each other and, in absence of the strip of material (1) under at least one roller, an error signal is released, characterized in that two rollers (8, 9) are mounted in a pivotal lever (7), of which the first roller (8) runs on the strip of material (1 ) to be registered and thereby inhibits the second roller (9), in contact with a roll (3) over which the strip of material (1) is guided, or comes to the second strip of material (2), wherein a device (14, 15) is provided for detecting the state of motion of the second roller (9), by means of which the error signal can be released.
2. An arrangement according to Claim 1, characterized in that the second roller (9) is provided with markings (15) which are detected by a photo-cell (14).
3. An arrangement according to Claim 2, characterized in that a second photo-cell (14) is provided for the detection of the marks (15), and the device to set off an error signal can be released only when both photo-cells (14) respond to the state of motion of the roller (9).
4. An arrangement according to any one of Claims 1 to 3, characterized in that the pivotal lever (7) is pressed by spring means against the strip of material (1).
EP83110636A 1982-11-05 1983-10-25 Device for controlling the presence of a fabric web Expired EP0108329B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3240825 1982-11-05
DE3240825A DE3240825C2 (en) 1982-11-05 1982-11-05 Device for checking the presence of a web of material

Publications (2)

Publication Number Publication Date
EP0108329A1 EP0108329A1 (en) 1984-05-16
EP0108329B1 true EP0108329B1 (en) 1986-01-08

Family

ID=6177330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110636A Expired EP0108329B1 (en) 1982-11-05 1983-10-25 Device for controlling the presence of a fabric web

Country Status (7)

Country Link
US (1) US4613750A (en)
EP (1) EP0108329B1 (en)
JP (1) JPS59103823A (en)
CS (1) CS253581B2 (en)
DD (1) DD210246A5 (en)
DE (2) DE3240825C2 (en)
SU (1) SU1297719A3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3341539A1 (en) * 1983-11-17 1985-05-30 Focke & Co, 2810 Verden DEVICE FOR MONITORING AND CONTROLLING RAILWAYS IN PACKAGING MACHINES
DE9107437U1 (en) * 1991-06-17 1991-08-22 Erhardt + Leimer GmbH, 86157 Augsburg Device for guiding a transversely stable track
DE19944958C2 (en) * 1999-09-20 2002-02-07 Voith Paper Patent Gmbh Guide or contact roller arrangement for handling a material web, in particular in a roll winding device
JP4864842B2 (en) * 2007-09-11 2012-02-01 富士重工業株式会社 Air-cooled engine cooling system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736136C (en) * 1940-03-22 1943-06-08 Aeg Device for controlling the edges of a fabric or paper web

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881275A (en) * 1955-12-16 1959-04-07 Molins Machine Co Ltd Device for detecting workpieces such as card blanks for packets
NL144540B (en) * 1965-02-17 1975-01-15 Gd Spa MACHINE FOR APPLYING TEAR TAPES ON PACKAGING FOIL.
DE2113316C3 (en) * 1971-03-19 1975-07-24 Focke & Pfuhl Verpackungsautomaten, Sonderkonstruktionen, 3090 Verden Device for checking the presence of a sealing strip on packs
DE2226048A1 (en) * 1971-07-21 1973-02-01 Polygraph Leipzig DEVICE FOR SWITCHING OFF A SHEET PROCESSING MACHINE WHEN DOUBLE OR MULTIPLE SHEETS APPEAR
US3889111A (en) * 1973-12-26 1975-06-10 Bendix Corp Device for positioning stock in a printing mechanism
US3886338A (en) * 1974-01-16 1975-05-27 Owens Corning Fiberglass Corp Band overlap detector switch for continuous ribbon mandrel
US3917142A (en) * 1974-04-04 1975-11-04 Data Products Corp Paper motion sensor apparatus
JPS6053190B2 (en) * 1976-10-15 1985-11-25 株式会社デンソー Rotation reference position detection device
DE2828103A1 (en) * 1978-06-27 1980-01-03 Hermann Gmbh Co Heinrich SHEET SCANNER
JPS57186305U (en) * 1981-05-22 1982-11-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736136C (en) * 1940-03-22 1943-06-08 Aeg Device for controlling the edges of a fabric or paper web

Also Published As

Publication number Publication date
SU1297719A3 (en) 1987-03-15
DE3240825C2 (en) 1985-06-20
JPH0543578B2 (en) 1993-07-02
CS712983A2 (en) 1985-06-13
DE3361805D1 (en) 1986-02-20
CS253581B2 (en) 1987-11-12
DD210246A5 (en) 1984-06-06
US4613750A (en) 1986-09-23
EP0108329A1 (en) 1984-05-16
DE3240825A1 (en) 1984-05-10
JPS59103823A (en) 1984-06-15

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