EP0041743B1 - Means for controlling the position of a moving web, particularly a roll support - Google Patents

Means for controlling the position of a moving web, particularly a roll support Download PDF

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Publication number
EP0041743B1
EP0041743B1 EP81105615A EP81105615A EP0041743B1 EP 0041743 B1 EP0041743 B1 EP 0041743B1 EP 81105615 A EP81105615 A EP 81105615A EP 81105615 A EP81105615 A EP 81105615A EP 0041743 B1 EP0041743 B1 EP 0041743B1
Authority
EP
European Patent Office
Prior art keywords
material web
sensors
control device
housing
bearing portion
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
EP81105615A
Other languages
German (de)
French (fr)
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EP0041743A2 (en
EP0041743A3 (en
Inventor
Heinz Focke
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.)
Focke and Co GmbH and Co KG
Original Assignee
Focke and Co GmbH and Co KG
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 Focke and Co GmbH and Co KG filed Critical Focke and Co GmbH and Co KG
Publication of EP0041743A2 publication Critical patent/EP0041743A2/en
Publication of EP0041743A3 publication Critical patent/EP0041743A3/en
Application granted granted Critical
Publication of EP0041743B1 publication Critical patent/EP0041743B1/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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/0326—Controlling transverse register of web by moving the unwinding device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H16/00—Unwinding, paying-out webs
    • B65H16/02—Supporting web roll
    • B65H16/04—Supporting web roll cantilever type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
    • B65H19/123—Lifting, transporting, or inserting the web roll; Removing empty core with cantilever supporting arrangements
    • 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
    • B65H23/0204—Sensing transverse register of web
    • B65H23/0216—Sensing transverse register of web with an element utilising photoelectric effect
    • 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4132—Cantilever arrangement
    • B65H2301/41324—Cantilever arrangement linear movement of roll support
    • B65H2301/413243—Cantilever arrangement linear movement of roll support parallel to roll axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/50—Driving mechanisms
    • B65H2403/52—Translation screw-thread mechanisms

Definitions

  • the invention relates to a control device for the position of a movable material web, in particular for an axially displaceable bobbin holder, in which the material web runs from a bobbin carrier, a scanning unit with two sensor holders, one on one side of the material web, in the region of the material web running off the bobbin carrier , are arranged, each having two sensors for transmission and reception, and a servomotor which can be controlled by the sensors is provided for adjusting the position of the material web or the bobbin carrier.
  • DE-B-1 043467 describes a device for the automatic lateral control of fabric webs, wherein an edge control is provided only on one edge of the continuous fabric web, which is equipped with two pairs of transmitters and receivers. These pairs of transmitters and receivers are arranged somewhat offset from one another and accommodated in a common fork which can be pivoted about an axis transversely to the direction of movement of the material web in order to be able to set the response range to a certain extent.
  • only one edge area of the material web can thus be monitored; monitoring and scanning of cracks in the entire width of the material web is neither provided nor possible there.
  • the device described there is not suitable for monitoring the flow of material webs, for example thin-walled packaging material webs for the cigarette industry. It is important that there are any cracks, which also. can occur at a very acute angle to the direction of travel of the material web, in order to be able to take the necessary countermeasures.
  • DE-A-2 429 109 describes an arrangement for monitoring a strip of wrapping material from the tobacco processing industry, electrodes of two capacitors being arranged close to one another at a monitoring point. These capacitors are connected via high-frequency resonant circuits to a mixer with downstream evaluation electronics in order to detect capacitive changes with the aid of beat frequencies.
  • Such an arrangement is, however, hardly suitable for practical needs because of the high-frequency-tight housing required, the complicated measuring probes and the electronics susceptible to faults.
  • the device described there is sensitive to dirt insofar as the zero position of the edge is set using a trimmer and small changes in mass should result in control signals. However, dust deposits over the entire length of the measuring probes will also have an influence and change the sensitivity points of the response data, so that malfunctions in practice are to be feared. Because of the required complex structure, a compact accommodation of the device described there is hardly possible.
  • the present invention is based on the object of improving a control device for the position of a movable material web, in particular for an axially displaceable bobbin holder of the type mentioned, in such a way that automatic alignment of the material web and monitoring of the material web during operation are simple is possible.
  • the sensor brackets each have two outer sensors for scanning the two side edges of the material web, that between the two outer sensors a plurality of further sensors are arranged at a short distance from each other, which are arranged in the region of the material web , and that the scanning unit with the sensor brackets and the sensors mounted thereon can be moved transversely to the material web with respect to the relative position by means of a common actuating gear.
  • the measures according to the invention enable the material web to be automatically aligned even during operation.
  • the measures according to the invention can detect cracks or defects in the material web at an early stage, whereupon the necessary countermeasures can be taken.
  • the bobbin holder shown as a detail in the drawings is preferably used in conjunction with a packaging machine.
  • the bobbin holder is usually arranged in the longitudinal center plane of the packaging machine above it.
  • a base 10 of the machine frame is shown.
  • the bobbin holder is on this or this Eccentric, laterally offset bracket for a bobbin carrier 11 is mounted.
  • the bobbin carrier 11 is used in the usual way to receive a bobbin 12 from a wound web 13 of packaging material, for example from tinfoil.
  • the bobbin support 11 is seated with bearings 14 and 15 rotatably on an axis 16, which is designed here as a hollow axis.
  • the bobbin support 11 formed from two side parts 17 and 18 is held together by a rotatable sleeve 19 which surrounds the axis 16.
  • the (smaller) side part 17 mounted on the free side can be pulled off in the axial direction from the sleeve 19 after loosening a head nut 20 of a known type which is designed in a special way.
  • the bobbin 12 can be replaced or a bobbin 12 can be placed on the empty bobbin holder 11 after pulling off a bobbin core.
  • the side part 18 which is fixedly arranged on the sleeve 19 and thus on the axis 16 is provided with a brake drum 21 which interacts with a movable brake shoe 22.
  • the bobbin carrier 11 can be displaced transversely, namely here in the axial direction.
  • the axis 16 is provided on the side opposite the head nut 20 with an extension in the form of a bearing piece 23.
  • This bearing piece 23, which is designed as a hollow axle, is in turn slidably received in a tubular housing 24 here.
  • the housing 24 is provided on the side facing the bobbin support 11 with a cross-sectional constriction, namely a guide section 25, in which the axle 16 or the bearing piece 23 is slidably guided and is stored.
  • the housing 24 is in turn also axially displaceable - in narrow areas - and correspondingly mounted on the base 10 in a holder 26.
  • the free end of the bearing piece 23 is provided with a collar 27, which serves as a stop to limit the movements.
  • Counter stops 28 and 29 of the housing 24 are provided with elastic pads.
  • a piston 31 is displaceable in the pressure medium cylinder 30 and can be acted upon by compressed air in one or the other direction via connecting pieces 32, 33.
  • the end of a piston rod 34 emerging from the pressure medium cylinder 30 is connected to the bearing piece 23 and thus to the axis 16 in the region of an intermediate wall 35.
  • the axis 16 is non-rotatable in the present case.
  • a longitudinal slot 36 is formed in the area of the bearing piece 23.
  • a nose 37 connected to the housing 24 enters the longitudinal slot 36 and provides a rotation lock.
  • the pressure medium cylinder 30 is also non-rotatably supported by the connecting pieces 32 and 33 which are led out laterally from the housing 24.
  • the bobbin support 11 can also be subjected to fine adjustments in the axial direction. This is done to adjust the running web 13 to an exact relative position. This in turn is monitored by a special scanning unit 38.
  • the aforementioned scanning unit 38 consists of two sensor rods 39 and 40 arranged at a distance from one another. Both are equipped with a number of sensors 41 ... 44, namely one sensor rod with transmitters, for example light sources, and the other rod with receivers , for example photodiodes.
  • Two outer sensors 41 and 42 each serve to scan the side edges of the web 13 with regard to possible misalignments.
  • a further, larger number of sensors 43 and 44 is used to monitor any tears and tears in the web 13. Since the formation of cracks may be at a very acute angle to the direction of travel of the web 13, the large number of sensors is relatively small Distance from each other.
  • the relative position of the scanning unit 38 also attached to the base 10 is adjustable.
  • the sensor rods 39, 40 are mounted on a common carrier 45, which in turn can be displaced against a compression spring 48 via an adjusting screw 46 with an adjusting nut 47.
  • the control signals of the sensors 41 and 42 responsible for the edge scanning can be transmitted to a servomotor 49, which effects a corresponding displacement of the bobbin support 11, specifically via an axial displacement of the housing 24 in the holder 26.
  • the servomotor 49 a direct current motor controlled by a suitable electronic circuit by the sensors 41, 42, drives a spindle 50 directed transversely to the housing 24. This in turn sets a spindle wheel 51 in rotation. With the spindle wheel 51, a union nut 52 rotates, which is mounted in a fixed position, namely on the base 10. An internal thread 53 of the union nut 52 meshes with an external thread 54 on the housing 24. This gear mechanism enables very fine axial adjustments of the bobbin carrier 11.
  • the effect of the sensors 43 and 44 is such that if there is a crack in the web 13 of the Ver packaging material the machine or a part of it is shut down.

Description

Die Erfindung betrifft eine Steuereinrichtung für die Lage einer bewegbaren Materialbahn, insbesondere für eine axial verschiebbare Bobinenhalterung, bei der die Materialbahn von einem Bobinenträger abläuft, wobei im Bereich der von dem Bobinenträger ablaufenden Materialbahn ein Abtastaggregat mit zwei Sensorhalterungen, jeweils einem auf einer Seite der Materialbahn, angeordnet sind, die jeweils zwei Sensoren für Sendung und Empfang aufweisen, und wobei für die Verstellung der Lage der Materialbahn bzw. des Bobinenträgers ein durch die Sensoren steuerbarer Stellmotor vorgesehen ist.The invention relates to a control device for the position of a movable material web, in particular for an axially displaceable bobbin holder, in which the material web runs from a bobbin carrier, a scanning unit with two sensor holders, one on one side of the material web, in the region of the material web running off the bobbin carrier , are arranged, each having two sensors for transmission and reception, and a servomotor which can be controlled by the sensors is provided for adjusting the position of the material web or the bobbin carrier.

In der DE-B-1 043467 ist eine Vorrichtung zur selbsttätigen seitlichen Steuerung von Stoffbahnen beschrieben, wobei lediglich an einer Kante der durchlaufenden Stoffbahn eine Kantensteuerung vorgesehen ist, die mit zwei Paaren von Sendern und Empfängern ausgerüstet ist. Diese Paare von Sendern und Empfängern sind etwas versetzt zueinander angeordnet und in einer gemeinsamen Gabel untergebracht, die um eine Achse quer zur Bewegungsrichtung der Materialbahn schwenkbar ist, um den Ansprechbereich in einem gewissen Umfang einstellen zu können. Bei der bekannten Vorrichtung kann somit nur der eine Kantenbereich der Materialbahn überwacht werden ; eine Überwachung und Abtastung von Rissen im gesamten Breitenbereich der Materialbahn ist dort weder vorgesehen noch möglich. Insofern ist die dort beschriebene Vorrichtung für die Überwachung des Ablaufes von Materialbahnen, beispielsweise dünnwandigen Verpackungsmaterialbahnen für die Zigarettenindustrie, nicht geeignet. Dabei kommt es nämlich darauf an, etwaige Rißbildungen, die auch. unter einem sehr spitzen Winkel zur Laufrichtung der Materialbahn auftreten können, frühzeitig zu erkennen, um die erforderlichen Gegenmaßnahmen ergreifen zu können.DE-B-1 043467 describes a device for the automatic lateral control of fabric webs, wherein an edge control is provided only on one edge of the continuous fabric web, which is equipped with two pairs of transmitters and receivers. These pairs of transmitters and receivers are arranged somewhat offset from one another and accommodated in a common fork which can be pivoted about an axis transversely to the direction of movement of the material web in order to be able to set the response range to a certain extent. In the known device, only one edge area of the material web can thus be monitored; monitoring and scanning of cracks in the entire width of the material web is neither provided nor possible there. In this respect, the device described there is not suitable for monitoring the flow of material webs, for example thin-walled packaging material webs for the cigarette industry. It is important that there are any cracks, which also. can occur at a very acute angle to the direction of travel of the material web, in order to be able to take the necessary countermeasures.

In der DE-A-2 429 109 ist eine Anordnung zur Überwachung eines Streifens aus einem Einschlagmaterial der tabakverarbeitenden Industrie beschreiben, wobei an einer Überwachungsstelle Elektroden von zwei Kondensatoren dicht nebeneinander angeordnet sind. Diese Kondensatoren sind über Hochfrequenz-Meßschwingkreise an eine Mischstufe mit nachgeschalteter Auswerteelektronik angeschlossen, um mit Hilfe von Schwebungsfrequenzen kapazitive Änderungen zu erfassen. Eine derartige Anordnung ist jedoch wegen der erforderlichen hochfrequenzdichten Gehäuse, der komplizierten Meßsonden sowie der störanfälligen Elektronik für die Bedürfnisse der Praxis kaum geeignet. Außerdem ist die dort beschriebene Vorrichtung insofern schmutzempfindlich, als die Nullposition der Kante über einen Trimmer eingestellt wird und geringe Massenänderungen Stellsignale ergeben sollen. Dabei werden aber auch Staubablagerungen über die gesamte Länge der Meßsonden Einfluß haben und die Empfindlichkeitspunkte der Ansprechdaten verändern, so daß Fehlfunktionen in der Praxis zu befürchten sind. Wegen des erforderlichen aufwendigen Aufbaus ist eine Kompakte Unterbringung der dort beschriebenen Vorrichtung kaum möglich.DE-A-2 429 109 describes an arrangement for monitoring a strip of wrapping material from the tobacco processing industry, electrodes of two capacitors being arranged close to one another at a monitoring point. These capacitors are connected via high-frequency resonant circuits to a mixer with downstream evaluation electronics in order to detect capacitive changes with the aid of beat frequencies. Such an arrangement is, however, hardly suitable for practical needs because of the high-frequency-tight housing required, the complicated measuring probes and the electronics susceptible to faults. In addition, the device described there is sensitive to dirt insofar as the zero position of the edge is set using a trimmer and small changes in mass should result in control signals. However, dust deposits over the entire length of the measuring probes will also have an influence and change the sensitivity points of the response data, so that malfunctions in practice are to be feared. Because of the required complex structure, a compact accommodation of the device described there is hardly possible.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, eine Steuereinrichtung für die Lage einer bewegbaren Materialbahn, insbesondere für eine axial verschiebbare Bobinenhalterung der eingangs genannten Art, dahingehend zu verbessern, daß in einfacher Weise ein automatisches Ausrichten der Materialbahn sowie eine Überwachung der Materialbahn während des Betriebes möglich ist.The present invention is based on the object of improving a control device for the position of a movable material web, in particular for an axially displaceable bobbin holder of the type mentioned, in such a way that automatic alignment of the material web and monitoring of the material web during operation are simple is possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Sensorhalterungen jeweils zwei äußere Sensoren zur Abtastung der beiden Seitenkanten der Materialbahn aufweisen, daß zwischen den beiden äußeren Sensoren jeweils eine Vielzahl von in geringem Abstand voneinander angeordneten weiteren Sensoren vorgesehen ist, die im Bereich der Materialbahn angeordnet sind, und daß das Abtastaggregat mit den Sensorhalterungen und den darauf angebrachten Sensoren hinsichtlich der Relativstellung quer zur Materialbahn mittels eines gemeinsamen Stellgetriebes verschiebbar ist.This object is achieved in that the sensor brackets each have two outer sensors for scanning the two side edges of the material web, that between the two outer sensors a plurality of further sensors are arranged at a short distance from each other, which are arranged in the region of the material web , and that the scanning unit with the sensor brackets and the sensors mounted thereon can be moved transversely to the material web with respect to the relative position by means of a common actuating gear.

Durch die erfindungsgemäßen Maßnahmen ist ein selbsttätiges Ausrichten der Materialbahn auch während des Betriebes möglich. Darüber hinaus können durch die erfindungsgemäßen Maßnahmen frühzeitig Risse oder Fehler der Materialbahn erkannt werden, worauf die erforderlichen Gegenmaßnahmen ergriffen werden können.The measures according to the invention enable the material web to be automatically aligned even during operation. In addition, the measures according to the invention can detect cracks or defects in the material web at an early stage, whereupon the necessary countermeasures can be taken.

Weiterbildende Merkmale der erfindungsgemäßen Steuereinrichtung, insbesondere konstruktive Details derselben, sind in den Unteransprüchen angegeben.Further-developing features of the control device according to the invention, in particular structural details thereof, are specified in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Es zeigt :

  • Figur 1 eine Steuereinrichtung für eine Bobinenhalterung im Längs- bzw. Axialschnitt in Arbeitsstellung ; und
  • Figur 2 eine Steuereinrichtung für die Bobinenhalterung gemäß Fig. 1 bei seitlich ausgefahrenem Bobinenträger, teilweise in Ansicht, teilweise im Axialschnitt.
It shows :
  • Figure 1 shows a control device for a bobbin holder in longitudinal or axial section in the working position; and
  • 2 shows a control device for the bobbin holder according to FIG. 1 with the bobbin support extended laterally, partly in view, partly in axial section.

Die in den Zeichnungen als Einzelheit gezeigte Bobinenhalterung kommt vorzugsweise in Verbindung mit einer Verpackungsmaschine zum Einsatz. Die Bobinenhalterung ist dabei üblicherweise in der Längsmittelebene der Verpackungsmaschine oberhalb derselben angeordnet. Als Teil der Verpackungsmaschine ober eines anderen Aggregates ist ein Sockel 10 des Maschinengestells wiedergegeben. Auf diesem bzw. an diesem ist die Bobinenhalterung mit außermittiger, seitlich versetzter Halterung für einen Bobinenträger 11 gelagert.The bobbin holder shown as a detail in the drawings is preferably used in conjunction with a packaging machine. The bobbin holder is usually arranged in the longitudinal center plane of the packaging machine above it. As part of the packaging machine above another unit, a base 10 of the machine frame is shown. The bobbin holder is on this or this Eccentric, laterally offset bracket for a bobbin carrier 11 is mounted.

Der Bobinenträger 11 dient in üblicher Weise zur Aufnahme einer Bobine 12 aus einer aufgewickelten Bahn 13 des Verpackungsmaterials, zum Beispiel aus Stanniol. Der Bobinenträger 11 sitzt mit Lagern 14 und 15 drehbar auf einer Achse 16, die hier als Hohlachse ausgebildet ist. Der aus zwei Seitenteilen 17 und 18 gebildete Bobinenträger 11 wird durch eine mitdrehbare Hülse 19 zusammengehalten, die die Achse 16 umschließt.The bobbin carrier 11 is used in the usual way to receive a bobbin 12 from a wound web 13 of packaging material, for example from tinfoil. The bobbin support 11 is seated with bearings 14 and 15 rotatably on an axis 16, which is designed here as a hollow axis. The bobbin support 11 formed from two side parts 17 and 18 is held together by a rotatable sleeve 19 which surrounds the axis 16.

Das auf der freien Seite gelagerte (kleinere) Seitenteil 17 ist in Axialrichtung von der Hülse 19 abziehbar, nach Lösen einer in besonderer Weise ausgebildeten Kopfmutter 20 bekannter Bauart. Nach Lösen der Kopfmutter 20 und Abziehen des Seitenteils 17 kann die Bobine 12 ausgewechselt bzw. eine Bobine 12 auf den leergefahrenen Bobinenträger 11 nach Abziehen eines Bobinenkerns aufgesetzt werden.The (smaller) side part 17 mounted on the free side can be pulled off in the axial direction from the sleeve 19 after loosening a head nut 20 of a known type which is designed in a special way. After loosening the head nut 20 and pulling off the side part 17, the bobbin 12 can be replaced or a bobbin 12 can be placed on the empty bobbin holder 11 after pulling off a bobbin core.

Das fest auf der Hülse 19 und damit auf der Achse 16 angeordnete Seitenteil 18 ist bei dem vorliegenden Ausführungsbeispiel mit einer Bremstrommel 21 versehen, die mit einer bewegbaren Bremsbacke 22 zusammenwirkt.In the present exemplary embodiment, the side part 18 which is fixedly arranged on the sleeve 19 and thus on the axis 16 is provided with a brake drum 21 which interacts with a movable brake shoe 22.

Zum Wechseln der Bobine 12 ist der Bobinenträger 11 querverschiebbar, nämlich hier in Axialrichtung. Zu diesem Zweck ist die Achse 16 auf der zur Kopfmutter 20 gegenüberliegenden Seite mit einer Verlängerung in Gestalt eines Lagerstücks 23 versehen. Dieses als Hohlachse ausgebildete Lagerstück 23 wiederum findet gleitend Aufnahme in einem hier rohrförmigen Gehäuse 24. Das Gehäuse 24 ist auf der dem Bobinenträger 11 zugekehrten Seite mit einer Querschnittsverengung, nämlich einem Führungsabschnitt 25 versehen, in dem die Achse 16 bzw. das Lagerstück 23 gleitend geführt und gelagert ist.To change the bobbin 12, the bobbin carrier 11 can be displaced transversely, namely here in the axial direction. For this purpose, the axis 16 is provided on the side opposite the head nut 20 with an extension in the form of a bearing piece 23. This bearing piece 23, which is designed as a hollow axle, is in turn slidably received in a tubular housing 24 here. The housing 24 is provided on the side facing the bobbin support 11 with a cross-sectional constriction, namely a guide section 25, in which the axle 16 or the bearing piece 23 is slidably guided and is stored.

Das Gehäuse 24 ist seinerseits ebenfalls axialverschiebbar - in engen Bereichen - und entsprechend auf dem Sockel 10 in einer Halterung 26 gelagert.The housing 24 is in turn also axially displaceable - in narrow areas - and correspondingly mounted on the base 10 in a holder 26.

Das freie Ende des Lagerstücks 23 ist mit einem Bund 27 versehen, der als Anschlag zur Begrenzung der Bewegugen dient. Gegenanschläge 28 und 29 des Gehäuses 24 sind mit elastischen Auflagen versehen.The free end of the bearing piece 23 is provided with a collar 27, which serves as a stop to limit the movements. Counter stops 28 and 29 of the housing 24 are provided with elastic pads.

Innerhalb des hohlen Lagerstücks 23 der Achse ist ein länglicher, schlanker Druckmittelzylinder 30, insbesondere ein pneumatischer Zylinder, ortsfest gelagert, nämlich mit dem Boden des Gehäuses 24 verbunden. In dem Druckmittelzylinder 30 ist ein Kolben 31 verschiebbar, der über Anschlußstücke 32, 33 in der einen oder anderen Richtung mit Druckluft beaufschlagbar ist. Das aus dem Druckmittelzylinder 30 heraustretende Ende einer Kolbenstange 34 ist mit dem Lagerstück 23 und damit mit der Achse 16 im Bereich einer Zwischenwand 35 verbunden.An elongated, slender pressure medium cylinder 30, in particular a pneumatic cylinder, is mounted in a stationary manner within the hollow bearing piece 23 of the axle, namely connected to the bottom of the housing 24. A piston 31 is displaceable in the pressure medium cylinder 30 and can be acted upon by compressed air in one or the other direction via connecting pieces 32, 33. The end of a piston rod 34 emerging from the pressure medium cylinder 30 is connected to the bearing piece 23 and thus to the axis 16 in the region of an intermediate wall 35.

Bei einer Beaufschlagung des Kolbens 31 in der Stellung gemäß Fig. 1 wandert dieser innerhalb des Druckmittelzylinders 30 bis in die Endstellung gemäß Fig. 2. Dadurch wird die Achse 16 in Längsrichtung verschoben. Das Lagerstück 23 gleitet im Gehäuse 24 bis zur Anlage des Bundes 27 am Anschlag 28. Der Bobinenträger 11 befindet sich nunmehr an leicht zugängiger Stelle.When the piston 31 is acted upon in the position according to FIG. 1, it moves within the pressure medium cylinder 30 to the end position according to FIG. 2. As a result, the axis 16 is displaced in the longitudinal direction. The bearing piece 23 slides in the housing 24 until the collar 27 abuts against the stop 28. The bobbin support 11 is now located at an easily accessible location.

Die Achse 16 ist im vorliegenden Falle unverdrehbar. Im Bereich des Lagerstücks 23 ist ein Längsschlitz 36 in dieser gebildet. Eine mit dem Gehäuse 24 verbundene Nase 37 tritt in den Längsschlitz 36 ein und gewährt eine Drehsicherung. Der Druckmittelzylinder 30 ist ebenfalls unverdrehbar gelagert durch die seitlich aus dem Gehäuse 24 herausgeführten Anschlußstücke 32 und 33.The axis 16 is non-rotatable in the present case. A longitudinal slot 36 is formed in the area of the bearing piece 23. A nose 37 connected to the housing 24 enters the longitudinal slot 36 and provides a rotation lock. The pressure medium cylinder 30 is also non-rotatably supported by the connecting pieces 32 and 33 which are led out laterally from the housing 24.

Der Bobinenträger 11 kann auch Feinverstellungen in Axialrichtung ausgesetzt werden. Diese erfolgen zur Justierung der ablaufenden Bahn 13 auf eine exakte Relativlage. Diese wiederum wird durch ein besonderes Abtastaggregat 38 überwacht.The bobbin support 11 can also be subjected to fine adjustments in the axial direction. This is done to adjust the running web 13 to an exact relative position. This in turn is monitored by a special scanning unit 38.

Das vorgenannte Abtastaggregat 38 besteht im vorliegenden Fall aus zwei im Abstand voneinander angeordneten Sensorstäben 39 und 40. Beide sind mit einer Anzahl von Sensoren 41 ... 44 bestückt, und zwar ein Sensorstab mit Sendern, zum Beispiel Lichtquellen, und der andere Stab mit Empfängern, zum Beispiel Fotodioden.In the present case, the aforementioned scanning unit 38 consists of two sensor rods 39 and 40 arranged at a distance from one another. Both are equipped with a number of sensors 41 ... 44, namely one sensor rod with transmitters, for example light sources, and the other rod with receivers , for example photodiodes.

Je zwei äußere Sensoren 41 und 42 dienen zur Abtastung der Seitenkanten der Bahn 13 hinsichtlich eventueller Schiefstellungen. Eine weitere, größere Anzahl von Sensoren 43 und 44 dient der überwachung von eventuellen Ein- und Abrissen der Bahn 13. Da die Rißbildung unter Umständen unter einem sehr spitzen Winkel zur Laufrichtung der Bahn 13 liegen kann, ist die große Anzahl der Sensoren mit verhältnismäßig geringem Abstand voneinander vorgesehen.Two outer sensors 41 and 42 each serve to scan the side edges of the web 13 with regard to possible misalignments. A further, larger number of sensors 43 and 44 is used to monitor any tears and tears in the web 13. Since the formation of cracks may be at a very acute angle to the direction of travel of the web 13, the large number of sensors is relatively small Distance from each other.

Die Relativstellung des hier ebenfalls am Sockel 10 angebrachten Abtastaggregates 38 ist einstellbar. Die Sensorstäbe 39, 40 sind zu diesem Zweck an einem gemeinsamen Träger 45 gelagert, der seinerseits über eine Stellschraube 46 mit Stellmutter 47 gegen eine Druckfeder 48 verschiebbar ist.The relative position of the scanning unit 38 also attached to the base 10 is adjustable. For this purpose, the sensor rods 39, 40 are mounted on a common carrier 45, which in turn can be displaced against a compression spring 48 via an adjusting screw 46 with an adjusting nut 47.

Die Steuersignale der für die Kantenabtastung verantwortlichen Sensoren 41 und 42 sind auf einen Stellmotor 49 übertragbar, der eine entsprechende Verschiebung des Bobinenträgers 11 bewirkt, und zwar über eine Axialverschiebung des Gehäuses 24 in der Halterung 26.The control signals of the sensors 41 and 42 responsible for the edge scanning can be transmitted to a servomotor 49, which effects a corresponding displacement of the bobbin support 11, specifically via an axial displacement of the housing 24 in the holder 26.

Der Stellmotor 49, ein über eine geeignete elektronische Schaltung durch die Sensoren 41, 42 gesteuerter Gleichstrommotor, treibt eine quer zum Gehäuse 24 gerichtete Spindel 50 an. Diese wiederum setzt ein Spindelrad 51 in Umdrehung. Mit dem Spindelrad 51 dreht eine Überwurfmutter 52, die ortsfest gelagert ist, nämlich am Sockel 10. Ein Innengewinde 53 der Überwurfmutter 52 kämmt mit einem Außengewinde 54 auf dem Gehäuse 24. Durch dieses Getriebe sind sehr feine Axialverstellungen des Bobinenträgers 11 möglich.The servomotor 49, a direct current motor controlled by a suitable electronic circuit by the sensors 41, 42, drives a spindle 50 directed transversely to the housing 24. This in turn sets a spindle wheel 51 in rotation. With the spindle wheel 51, a union nut 52 rotates, which is mounted in a fixed position, namely on the base 10. An internal thread 53 of the union nut 52 meshes with an external thread 54 on the housing 24. This gear mechanism enables very fine axial adjustments of the bobbin carrier 11.

Die Wirkung der Sensoren 43 und 44 ist derart, daß bei einem Riß in der Bahn 13 des Verpackungsmaterials die Maschine bzw. ein Teil derselben stillgesetzt wird.The effect of the sensors 43 and 44 is such that if there is a crack in the web 13 of the Ver packaging material the machine or a part of it is shut down.

Claims (6)

1. A control device for the position of a movable material web (13), in particular for an axially displaceable reel mounting, in which the material web (13) runs off a reel carrier (11), whereby a sensing unit (38) is arranged adjacent the material web (13) running off the reel carrier (11) and has two sensor holders (39, 40) each arranged on a respective side of the material web (13) and having two sensors (41, 42) for receiving and transmission, and whereby for adjusting the position of the material web (13) or the reel carrier (11) there is provided a motor (49) controllable by the sensors (41, 42), characterised in that the sensor holders (39, 40) each have two outer sensors (41, 42) for sensing the two side edges of the material web (13), that between the two outer sensors (41, 42) in each case is arranged a plurality of closely adjacent further sensors (43, 44) which are arranged in the region of the material web (13), and that the sensing unit (38) with the sensor holders (39, 40) and the sensors (41, 42, 43, 44) mounted thereon are displaceable with respect to their relative position transverse the material web (13) by means of a common adjusting device (45, 46, 47, 48).
2. A control device according to claim 1, characterised in that the motor (49) supplied with control signals by the sensors (41, 42, 43, 44) is connected by means of a worm drive (50, 51, 52, 53, 54) to the housing (24) of the reel carrier (11) which is thus adapted for fine axial adjustement by axial displacement of the housing (24).
3. A control device according to claim 1 or 2, characterised in that the reel carrier (11) is mounted on an axially displaceable shaft (16) which is extended and displaceably mounted with a bearing portion (23) in a guide (guide section 25).
4. A control device according to claim 3, characterised in that the shaft (16) is additionally displaceable by pressure means, in particular by compressed air, whereby a piston rod (34) of a pneumatic cylinder (30) is connected to the shaft (16) or the bearing portion (23).
5. A control device according to one or more of claims 1-4, characterised in that the bearing portion (23) of the shaft (16) is of hollow construction and moveable via a fixed axis-parallel or coaxial pneumatic cylinder (30).
6. A control device according to claim 5, characterised in that the pneumatic cylinder (30), the (hollow) bearing portion (23) and the outer housing (24) are mounted axis-parallel, in particular coaxially one within the other.
EP81105615A 1979-09-18 1980-09-04 Means for controlling the position of a moving web, particularly a roll support Expired EP0041743B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792937661 DE2937661A1 (en) 1979-09-18 1979-09-18 BOBINE HOLDER, ESPECIALLY FOR PACKAGING MACHINES
DE2937661 1979-09-18

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP80105283.8 Division 1980-09-04

Publications (3)

Publication Number Publication Date
EP0041743A2 EP0041743A2 (en) 1981-12-16
EP0041743A3 EP0041743A3 (en) 1982-06-23
EP0041743B1 true EP0041743B1 (en) 1985-11-21

Family

ID=6081154

Family Applications (2)

Application Number Title Priority Date Filing Date
EP80105283A Expired EP0025563B1 (en) 1979-09-18 1980-09-04 Spool holder for packaging machines
EP81105615A Expired EP0041743B1 (en) 1979-09-18 1980-09-04 Means for controlling the position of a moving web, particularly a roll support

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP80105283A Expired EP0025563B1 (en) 1979-09-18 1980-09-04 Spool holder for packaging machines

Country Status (4)

Country Link
US (2) US4366932A (en)
EP (2) EP0025563B1 (en)
JP (1) JPS5652348A (en)
DE (3) DE2937661A1 (en)

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Also Published As

Publication number Publication date
EP0025563A1 (en) 1981-03-25
US4434947A (en) 1984-03-06
US4366932A (en) 1983-01-04
EP0041743A2 (en) 1981-12-16
DE2937661A1 (en) 1981-04-02
EP0041743A3 (en) 1982-06-23
EP0025563B1 (en) 1984-02-01
JPS5652348A (en) 1981-05-11
DE3071258D1 (en) 1986-01-02
DE3066401D1 (en) 1984-03-08
JPS6121898B2 (en) 1986-05-29

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