CH432969A - Device for regulating the feed length of a material strip - Google Patents

Device for regulating the feed length of a material strip

Info

Publication number
CH432969A
CH432969A CH537566A CH537566A CH432969A CH 432969 A CH432969 A CH 432969A CH 537566 A CH537566 A CH 537566A CH 537566 A CH537566 A CH 537566A CH 432969 A CH432969 A CH 432969A
Authority
CH
Switzerland
Prior art keywords
turntable
material strip
axis
pressure roller
organ
Prior art date
Application number
CH537566A
Other languages
German (de)
Inventor
Kopp Georg
Original Assignee
Sig Schweiz Industrieges
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 Sig Schweiz Industrieges filed Critical Sig Schweiz Industrieges
Priority to CH537566A priority Critical patent/CH432969A/en
Publication of CH432969A publication Critical patent/CH432969A/en
Priority to GB1693767A priority patent/GB1129936A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18Registering sheets, blanks, or webs
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/043Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/04Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B5/043Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Advancing Webs (AREA)

Description

  

  
 



  Vorrichtung zum Regeln der Vorschublänge eines Materialbandes
Die Erfindung betrifft eine Vorrichtung zum Regeln der Vorschublänge eines Materialbandes an einer Verarbeitungsmaschine mittels einer photoelektrischen Einrichtung.



   Bei Verpackungsmaschinen wird oft   dlas    Einschlagmaterial als Band von einer Vorratsrolle abgezogen und in Einzelbogen von bestimmter Länge zerschnitten, aus denen dann die Umhüllung der zu verpackenden Gegenstände gebildet wird. Der periodische Vorschub des Einschlagmaterialbandes erfolgt dabei durch ein angetriebenes Rollen- oder Walzenpaar, zwischen dem das Band durchläuft. Der jeweilige Vorschub entspricht dabei der Strecke, welche die Mantelflächen der Vorschubwalzen bei jedem Arbeitstakt zurücklegen. Durch Veränderung dieser Strecke bzw. des Drehwinkels der Walzen pro Arbeitstakt kann die Länge der Einschlagmaterialzuschnitte verändert werden. Diese Zuschnitte müssen für eine bestimmte Einstellung der Maschine immer gleich lang sein, damit einwandfreie Packungen hergestellt werden können.



   Wenn als Einschlagmaterial Papier verwendet wird, arbeitet eine solche Vorrichtung einwandfrei. Wird jedoch z. B. eine Kunststoffolie mit einer sehr glatten Oberfläche verwendet, so tritt gelegentlich zwischen dem Materialband und den Vorschubwalzen ein gewisser Schlupf ein. Dies hat zur Folge, dass das Materialband nicht um eine volle Länge vorgeschoben wird. Der Zuschnitt wird dadurch zu kurz, was zu Ausschuss führt.



   Die Erfindung bezweckt, diesen Nachteil zu beheben.



  Sie ist dadurch gekennzeichnet, dass das Materialband über ein frei umlauffähiges Organ läuft und dieses durch Vermittlung von Anpressmitteln, die mindestens in einem Punkt einen schlupffreien Eingriff zwischen Materialband und umlauffähigem Organ schaffen, in Umlauf setzt und dass das umlauffähige Organ mit die photo elektrische Einrichtung beeinflussenden Markierungen versehen ist.



   Es ist an sich bekannt, den Vorschub eines Einschlagmaterialbandes mittels einer photoelektrischen Zelle zu steuern. Zu diesem Zweck werden auf das Materialband spezielle Zentriermarken aufgedruckt, welche von der Photozelle abgetastet werden. Dieses Verfahren ist jedoch teuer und lohnt sich nur, wenn das Einschlagmaterial ohnehin bedruckt werden muss.



  Die erfindungsgemässe Vorrichung gestattet dagegen die Verwendung von Einschlagmaterial ohne spezielle Zentriermarken. Sie ist somit vor allem für unbedrucktes Einschlagmaterial vorteilhaft.



   In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt. Es zeigen:
Fig. 1 eine Seitenansicht der erfindungsgemässen Vorrichtung in schematischer Darstellung und
Fig. 2 eine Draufsicht auf die Vorrichtung nach Fig. 1.



   Das Einschlagmaterialband 1 wird von einer Vorratsrolle durch ein nicht dargestelltes Vorschubwalzen paar schrittweise in Richtung des Pfeiles 2 vorgeschoben. Die Vorschubwalzen können dabei kontinuierlich angetrieben und für die Dauer des Vorschubes z. B. durch einen Elektromagneten gegeneinander gepresst werden, so dass das zwischen ihnen befindliche Band 1 fortbewegt wird. Der Antrieb der Vorschubwalzen könnte aber auch periodisch eine und ausgeschaltet werden. Direkt unter dem Materialband 1 befindet sich ein Drehtisch 3, der in einem Lager 4 frei drehbar gelagert ist.

   Auf der Unterseite des   Drehtisches    3 sind in gleichen Abständen Marken 5 angebracht, die eine photoelektrische Zentriereinrichtung 6 an sich bekannter Bauart beeinflussen.   Uber    dem Materialband 1 ist an einem Arm 7 eine Anpressrolle 8 derart angeordnet, dass ihre Achse in einer Ebene liegt, die durch die Achse des Drehtisches 3 und senkrecht zur Bewegungsrichtung der Materialbahn 1 verläuft. Die Anpressrolle 8 ist, wie in Fig. 1 durch den Doppelpfeil angedeutet, axial verstellbar.



   Die Wirkungsweise der Vorrichtung ist folgende: Die Anpressrolle 8 drückt das Materialband 1 exzentrisch auf die Oberfläche des Drehtisches 3. Dadurch wird an der Andruckstelle die Reibung zwischen dem   Materialband und dem Drehtisch stark vergrössert. Der Drehtisch wird deshalb durch die Vorschubbewegung des Materialbandes in Umdrehung versetzt, bis eine der Marken 5 über der Photozelle 6 durchläuft, worauf diese, auf an sich bekannte Weise, die den Vorschub des Materialbandes veranlassenden Mittel ausser Wirkung setzt. Beim nächsten Arbeitstakt wird das Materialband 1 vorgeschoben, bis die nächste Marke 5 über der Photozelle 6 durchläuft. Die Länge des Vorschubes kann durch Verstellen der Anpressrolle 8 in Richtung des Doppelpfeiles 9, d. h. radial zum Drehtisch, ver ändert werden.

   Falls ein bedrucktes und mit Zentriermarken versehenes Materialband verarbeitet werden soll, kann lediglich der Drehtisch 3 entfernt werden.



  Die Zentriermarken des Materialbandes beeinflussen dann in bekannter Weise direkt die Photozelle 6.   



  
 



  Device for regulating the feed length of a material strip
The invention relates to a device for regulating the feed length of a material strip on a processing machine by means of a photoelectric device.



   In packaging machines, the wrapping material is often pulled off a supply roll as a tape and cut into individual sheets of a certain length, from which the wrapping of the objects to be packed is then formed. The periodic advance of the wrapping material strip is carried out by a driven pair of rollers, between which the strip runs. The respective feed corresponds to the distance that the outer surfaces of the feed rollers cover with each work cycle. By changing this distance or the angle of rotation of the rollers per work cycle, the length of the wrapping material blanks can be changed. These blanks must always be of the same length for a certain setting of the machine so that perfect packs can be produced.



   If paper is used as the wrapping material, such a device works properly. However, if z. If, for example, a plastic film with a very smooth surface is used, a certain slip occurs occasionally between the material strip and the feed rollers. As a result, the material strip is not advanced a full length. This makes the cut too short, which leads to rejects.



   The invention aims to remedy this disadvantage.



  It is characterized in that the material band runs over a freely circulating organ and this is set in circulation by means of pressing means that create a slip-free engagement between the material band and the circulating organ at least at one point and that the circulating organ with the photoelectric device influencing Markings is provided.



   It is known per se to control the advance of a band of wrapping material by means of a photoelectric cell. For this purpose, special centering marks are printed on the material strip, which are scanned by the photocell. However, this process is expensive and is only worthwhile if the wrapping material has to be printed anyway.



  In contrast, the device according to the invention allows the use of wrapping material without special centering marks. It is therefore particularly advantageous for unprinted wrapping material.



   An exemplary embodiment of the subject matter of the invention is shown in the drawing. Show it:
1 shows a side view of the device according to the invention in a schematic representation and
FIG. 2 shows a plan view of the device according to FIG. 1.



   The wrapping material strip 1 is advanced step by step in the direction of arrow 2 from a supply roll by a pair of feed rollers (not shown). The feed rollers can be driven continuously and for the duration of the feed z. B. are pressed against each other by an electromagnet, so that the tape 1 located between them is moved. The drive of the feed rollers could also be switched on and off periodically. Directly under the material strip 1 there is a turntable 3 which is freely rotatably mounted in a bearing 4.

   On the underside of the turntable 3, marks 5 are attached at equal intervals, which influence a photoelectric centering device 6 of a known type. A pressure roller 8 is arranged on an arm 7 above the material strip 1 in such a way that its axis lies in a plane which runs through the axis of the turntable 3 and perpendicular to the direction of movement of the material web 1. The pressure roller 8 is, as indicated in Fig. 1 by the double arrow, axially adjustable.



   The mode of operation of the device is as follows: The pressure roller 8 presses the material band 1 eccentrically onto the surface of the turntable 3. This greatly increases the friction between the material band and the turntable at the pressure point. The turntable is therefore set in rotation by the feed movement of the material strip until one of the marks 5 passes over the photocell 6, whereupon this, in a manner known per se, deactivates the means causing the feed of the material strip. During the next work cycle, the material strip 1 is advanced until the next mark 5 passes over the photocell 6. The length of the advance can be adjusted by adjusting the pressure roller 8 in the direction of the double arrow 9, d. H. radial to the turntable, can be changed.

   If a printed material strip provided with centering marks is to be processed, only the turntable 3 can be removed.



  The centering marks of the material strip then directly influence the photocell 6 in a known manner.

 

Claims (1)

PATENTANSPRUCH Vorrichtung zum Regeln der Vorschublänge eines Materialbandes an einer Verarbeitungsmaschine mittels einer photoelektrischen Einrichtung, dadurch gekennzeichnet, dass das Materialband über ein frei umlauffähiges Organ läuft und dieses durch Vermittlung von Anpressmitteln, die mindestens in einem Punkt einen schlupffreien Eingriff zwischen Materialband und umlauffähigem Organ schaffen, in Umlauf setzt und dass das umlauffähige Organ mit die photoelektrische Einrichtung beeinflussenden Markierungen versehen ist. PATENT CLAIM A device for regulating the feed length of a material band on a processing machine by means of a photoelectric device, characterized in that the material band runs over a freely circulating organ and this through the mediation of pressing means which create a slip-free engagement between the material band and the circulating organ in at least one point Circulation sets and that the circulatory organ is provided with markings that influence the photoelectric device. UNTERANSPROCHE 1. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass das umlauffähige Organ als frei drehbar gelagerter Drehtisch (3) ausgebildet ist. SUBSCRIBED 1. Device according to claim, characterized in that the rotatable organ is designed as a freely rotatably mounted turntable (3). 2. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass als Anpressmittel eine exzentrisch auf den Drehtisch einwirkende Anpressrolle (8) vorgesehen ist, deren Achse in einer Ebene liegt, welche mindestens annähernd senkrecht zur Bewegungsrichtung des Materialbandes steht. 2. Device according to claim, characterized in that a pressure roller (8) acting eccentrically on the turntable is provided as the pressing means, the axis of which lies in a plane which is at least approximately perpendicular to the direction of movement of the material strip. 3. Vorrichtung nach den Unteransprüchen 1 und 2, dadurch gekennzeichnet, dass die Ebene, in welcher die Achse der Anpressrolle (8) liegt, die Achse des Drehtisches enthält. 3. Device according to the dependent claims 1 and 2, characterized in that the plane in which the axis of the pressure roller (8) lies contains the axis of the turntable. 4. Vorrichtung nach Unteranspruch 3, dadurch gekennzeichnet, dass die Anpressrolle (8) entlang ihrer Achse verstellt werden kann. 4. Device according to dependent claim 3, characterized in that the pressure roller (8) can be adjusted along its axis.
CH537566A 1966-04-14 1966-04-14 Device for regulating the feed length of a material strip CH432969A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH537566A CH432969A (en) 1966-04-14 1966-04-14 Device for regulating the feed length of a material strip
GB1693767A GB1129936A (en) 1966-04-14 1967-04-13 Improvements in or relating to apparatus for regulating the feed length of strip material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH537566A CH432969A (en) 1966-04-14 1966-04-14 Device for regulating the feed length of a material strip

Publications (1)

Publication Number Publication Date
CH432969A true CH432969A (en) 1967-03-31

Family

ID=4292500

Family Applications (1)

Application Number Title Priority Date Filing Date
CH537566A CH432969A (en) 1966-04-14 1966-04-14 Device for regulating the feed length of a material strip

Country Status (2)

Country Link
CH (1) CH432969A (en)
GB (1) GB1129936A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095176A1 (en) * 1982-05-25 1983-11-30 Maschinenfabrik Alfred Schmermund GmbH & Co. Feeding device for webs with register marks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095176A1 (en) * 1982-05-25 1983-11-30 Maschinenfabrik Alfred Schmermund GmbH & Co. Feeding device for webs with register marks

Also Published As

Publication number Publication date
GB1129936A (en) 1968-10-09

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