EP0519261B1 - Device for guiding a laterally stable web - Google Patents

Device for guiding a laterally stable web Download PDF

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Publication number
EP0519261B1
EP0519261B1 EP92109280A EP92109280A EP0519261B1 EP 0519261 B1 EP0519261 B1 EP 0519261B1 EP 92109280 A EP92109280 A EP 92109280A EP 92109280 A EP92109280 A EP 92109280A EP 0519261 B1 EP0519261 B1 EP 0519261B1
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EP
European Patent Office
Prior art keywords
web
guide rollers
spindle
yoke
width
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Expired - Lifetime
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EP92109280A
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German (de)
French (fr)
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EP0519261A1 (en
Inventor
Heinrich Niemann
Hans Wulf
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Erhardt and Leimer GmbH
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Erhardt and Leimer GmbH
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    • 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
    • B65H23/038—Controlling transverse register of web by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated

Definitions

  • the invention relates to a device for guiding a running, cross-stable web, in particular a corrugated cardboard web, a corrugated cardboard sheet web, a paper web or a cross-stable film web, with a stationary support for the underside of the web and with a moving one that is placed approximately centrally on the top of the web Guide cylinder which can be pivoted back and forth by means of a drive about an adjusting axis lying approximately perpendicular to the plane of the web and which is arranged in a stationary manner in front of the guide cylinder in the web running direction.
  • the continuously formed guide cylinder extends over almost half the web width. If the guide cylinder is pivoted for correction, then the mechanical load in the strip is very high at the ends of the long linear support zone of the guide cylinder. In addition, the central area of the guide cylinder has almost no corrective action, so that the strip is locally distorted. In addition, the guide cylinder presses the strip sustainably on the support, so that the central area of the strip which is acted upon for correction is undesirably clamped over the entire width of the support zone and the strip is not only braked, but corrections may be made. unwillingly follows. This can damage the strip.
  • the width of the support zone of the one-piece guide cylinder is approximately one third of the total width of the paper strip.
  • each guide cylinder corresponds to approximately 1/6 of the strip width.
  • the invention has for its object to provide a device of the type mentioned, with the wide, cross-stable webs can be performed sensitively and gently.
  • the stated object is achieved in that instead of the guide cylinder of a device of the type mentioned, at least two parallel and jointly pivotable guide rollers are provided, which are spaced transversely to the web running direction and whose width is less than their diameter.
  • the central area of the web acted upon for correction by the guide rollers is acted upon effectively but gently, since the guide rollers exert the correction forces with favorable lever arms with respect to the actuating axis; however, the path between the narrow guide rollers is left with the opportunity to relax.
  • the spaced narrow guide rollers in the transverse direction of the web compensate for the differences between mechanically stressed web areas and relaxed web areas.
  • the web can distribute the loads introduced by the correction more favorably in the spaces between the guide rollers. There is no longer any harmful distortion with wrinkling. It is favorable that relatively high contact pressures are possible in the narrow contact zones and that each guide roller implements its corrective skew almost without loss.
  • several spaced-apart guide rollers with short support zones result in better and gentler guidance of the web than a continuous guide cylinder of the same overall length. With an inclined position, the guide rollers can run without slip and at different speeds relative to each other.
  • the material specification according to claim 4 has proven to be expedient especially for paper and corrugated cardboard webs.
  • the guide rollers can assume independent height positions and correct them individually.
  • the contact pressure of the guide roller can be adjusted or the guide rollers can be lifted off the web for threading or possibly even with the web running correctly.
  • the assembly according to claim 8 is advantageous in terms of assembly. It also enables the device to be retrofitted to a web processing system in order to convert it.
  • Devices of this type usually work with optical edge sensing devices, from whose signals the correction movements are derived. Especially when processing paper and cardboard webs, fluff and dust occur, which show the undesirable tendency to deposit on stationary parts.
  • the optical edge sensing devices in particular suffer from this. When correcting a traverse path of the guide cylinder presses the web onto the stationary support, this hinders the correction movement and longitudinal stresses are generated in the drawn web.
  • a gentle, sensitive correction is therefore ensured in the embodiment according to claim 9 in the sense of the task cited at the beginning, because the compressed air on the one hand keeps the optical edge sensing devices normally provided clean and on the other hand the contact pressure the web reduced.
  • a kind of air cushion can arise under the web, on which the web slides easily in both the longitudinal and transverse directions and responds more sensitively to the correction forces.
  • this embodiment is characterized in that the spaced guide rollers work effectively, while the air cushion below the web reduces the movement resistance of the web on the support.
  • an air cushion built up under the running path also has advantages if the surface is acted on with a continuous long guide cylinder or with only one guide roller for the purpose of path correction.
  • the nozzle slot can extend over the width of the support zone of the guide rollers or can also be wider so that the web is acted upon by the compressed air over its entire width. If the guide slot is even wider than the web, the optical edge sensing devices on the web edges are kept clean.
  • a device V for guiding a running, cross-stable web B for example a paper web or a corrugated cardboard web
  • a frame-shaped structural unit R which is mounted in the running path of web B and through which web B passes.
  • the assembly R contains a lower, continuous support A, which forms a flat sliding surface 4, side supports 2 and a bridge 3 spanning the web B.
  • the web B runs in the direction of an arrow 1. At least one edge is defined by optical edges -Feeding device F scanned in order to determine a transverse course of the web B with respect to the desired running direction and to be able to generate correction signals.
  • a guide cylinder Z is mounted rotatably about a cylinder axis 5 in the middle of the web, which in the exemplary embodiment shown is formed from three parallel and narrow guide rollers R 1, R 2 R 3 lying side by side transversely to the web running direction 1.
  • the cylinder axis 5 is supported in a yoke 6 which is pivotable up and down about a yoke axis 7.
  • the yoke axis 7 lies parallel to the cylinder axis 5 and is fixed in a bracket 16 which can be pivoted back and forth about an adjusting axis 9 approximately perpendicular to the plane of the path B by means of a drive 10 fastened to the carrier 3.
  • the drive 10 for example a hydraulic or pneumatic actuating cylinder or an electric actuator, acts on a cantilever 11 of the bracket 16.
  • the bracket 16 is rotatable in a bearing bush 15 about the actuating axis 9, the bush 15 being fixed to the carrier 3 by a bracket 8.
  • a loading and / or unloading device 17 is provided for the freely rotatably mounted guide rollers R1, R2, R3, for example a small working cylinder, a proportional magnet or a spring.
  • Spacers 24 are provided between the guide rollers R1, R2, R3.
  • the edge sensing device F consists of optoelectronic edge sensors 12, 13 which are adjustable in the direction of the double arrows 14 to adapt to the web width and are expediently attached to the carrier 3.
  • a drive not shown, allows the sensors 12, 13 to be adjusted during operation.
  • the sensors 12, 13, like the drive 10 and possibly the loading and / or unloading device 17, are connected to an expediently programmable control device (not shown).
  • the guide rollers R1, R2, R3 lie on the top of the web B and run freely with the web B.
  • the contact pressure can be adjusted by means of the loading and / or unloading device 17.
  • the guide rollers R1, R2, R3 can be lifted off the support A by means of the loading and / or unloading device 17.
  • the support A has a nozzle slot 18 through which compressed air can be fed from below to the web B by means of a pressure blower 19 representing a pressure source P.
  • the compressed air cleans the edge sensing device F and relieves the web B on the support A. If necessary, an air cushion is built up which enables the web B to slide easily.
  • the support A has perforations 21 which establish a connection from an air distribution box 20 on the underside to the underside of the web B, so that an air cushion K can be produced below the web B.
  • a pressure blower 19 is connected to the air distribution box. If necessary, the effective size of the air cushion can be changed by means of slides arranged in the air distribution box below the support A.
  • the guide rollers R1, R2, R3 are stored on their own short axes 5a, 5b, 5c, which are pivotally supported with brackets 22 on the yoke axis 7 and are spaced apart by spacers 23.
  • the width b of the guide rollers R1, R2, R3 is approximately 30% of the diameter d. With three guide rollers R1, R2, R3, the mutual distance a2 is approximately the width b. However, if only two guide rollers R1 and R2 are provided, then these are spaced apart by the distance a1, which corresponds approximately to the diameter d. A separate loading and / or unloading device 17 for loading and unloading can be provided for each holder 22.
  • the guide rollers R1, R2, R3 are made of plastic and have a cylindrical circumferential surface that is smooth and yet has a good grip. With a view to low inertia, the guide rollers R are light and shaped with spokes. If necessary, the spacer elements 23 are molded on. Internal slide bearings ensure that the guide rollers can be easily rotated.
  • the structural unit R can be formed with two supports 3 lying next to one another. It is also conceivable to arrange loading or relief weights on the brackets 22 in FIG.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Führen einer laufenden, querstabilen Bahn, insbesondere einer Wellpappebahn, einer Wellpappe-Lage-Bahn, einer Papierbahn oder einer querstabilen Folienbahn, mit einer stationären Auflage für die Bahnunterseite und mit einem in etwa mittig auf die Bahnoberseite aufgesetzten, mitlaufenden Führungszylinder, der mittels eines Antriebs um eine in etwa senkrecht zur Ebene der Bahn liegende Stellachse hin- und herschwenkbar ist, die in Bahnlaufrichtung vor dem Führungszylinder stationär angeordnet ist.The invention relates to a device for guiding a running, cross-stable web, in particular a corrugated cardboard web, a corrugated cardboard sheet web, a paper web or a cross-stable film web, with a stationary support for the underside of the web and with a moving one that is placed approximately centrally on the top of the web Guide cylinder which can be pivoted back and forth by means of a drive about an adjusting axis lying approximately perpendicular to the plane of the web and which is arranged in a stationary manner in front of the guide cylinder in the web running direction.

Bei einer aus EP-A2-0277761, Figur 10, bekannten Vorrichtung zum Führen eines Streifens beim Wickeln von Transformatoren erstreckt sich der durchgehend ausgebildete Führungszylinder über annähernd die halbe Bahnbreite. Wird der Führungszylinder zur Korrektur verschwenkt, dann ist an den Enden der langen linienförmigen Auflagezone des Führungszylinders die mechanische Belastung im Streifen sehr hoch. Dazu kommt, daß der Führungszylinder mit seinem Mittelbereich fast keine Korrekturwirkung ausübt, so daß der Streifen lokal verzerrt wird. Außerdem drückt der Führungszylinder den Streifen nachhaltig auf die Auflage, so daß der zum Korrigieren beaufschlagte Mittelbereich des Streifens beim Korrigieren in unerwünschter Weise über die gesamte Auflagezonen-Breite eingeklemmt ist und der Streifen nicht nur gebremst wird, sondern Korrekturen u.U. unwillig folgt. Es kann so zu Schäden im Streifen kommen.In a device for guiding a strip when winding transformers known from EP-A2-0277761, FIG. 10, the continuously formed guide cylinder extends over almost half the web width. If the guide cylinder is pivoted for correction, then the mechanical load in the strip is very high at the ends of the long linear support zone of the guide cylinder. In addition, the central area of the guide cylinder has almost no corrective action, so that the strip is locally distorted. In addition, the guide cylinder presses the strip sustainably on the support, so that the central area of the strip which is acted upon for correction is undesirably clamped over the entire width of the support zone and the strip is not only braked, but corrections may be made. unwillingly follows. This can damage the strip.

Bei einer anderen, aus WO-88/01755 bekannten Vorrichtung zum Führen eines Foto-Druckpapierbandes beträgt die Breite der Auflagezone des einstückigen Führungszylinders annähernd ein Drittel der Gesamtbreite des Papierstreifens. Mit dieser langen, für eine feinfühlige Korrektur wünschenswerten Auflagezone des Führungszylinders treten an den Längsenden des Führungszylinders hohe mechanische Belastungen im Streifen auf, die einerseits zu Schäden im Streifen führen können und andererseits die Korrekturwirkung des Führungszylinders zwischen seinen Enden herabsetzen. Ferner wird beim Korrigieren und auch bei korrektem Lauf der Streifen zwischen dem Führungszylinder und der stationären Auflage über die Breite der Auflagezone geklemmt, was zusätzliche mechanische Belastungen im Streifen bedeutet und das Seitwärtsschieben des Streifens bei der Korrektur erschwert.In another device for guiding a photographic printing paper tape known from WO-88/01755, the width of the support zone of the one-piece guide cylinder is approximately one third of the total width of the paper strip. With this long support zone of the guide cylinder, which is desirable for a sensitive correction, high mechanical loads occur in the strip at the longitudinal ends of the guide cylinder, which on the one hand can lead to damage in the strip and on the other hand reduce the correction effect of the guide cylinder between its ends. Furthermore, when correcting and also when the strip is running correctly, the strip is clamped between the guide cylinder and the stationary support over the width of the support zone, which means additional mechanical loads in the strip and makes it more difficult to push the strip sideways during the correction.

Bei einer aus der DE-A1-28 44 528 bekannten Vorrichtung einer anderen Art zum Führen eines fotografischen Papierstreifens läuft der Papierstreifen mittig durch einen Walzenspalt zweier gegeneinandergedrückter Führungszylinder, von denen der eine angetrieben wird. Die Breite jedes Führungszylinders entspricht ca. 1/6 der Streifenbreite. Mit derart kurzen Führungszylindern müssen für eine einigermaßen zufriedenstellende Korrekturwirkung eine starke Schrägstellung und eine starke Klemmung eingestellt werden, was zu hohen mechanischen Belastungen im Streifen führt.In a device of another type known from DE-A1-28 44 528 for guiding a photographic paper strip, the runs Paper strips in the middle through a nip of two guide cylinders pressed against each other, one of which is driven. The width of each guide cylinder corresponds to approximately 1/6 of the strip width. With such short guide cylinders, a strong inclination and a strong clamping must be set for a reasonably satisfactory correction effect, which leads to high mechanical loads in the strip.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, mit der breite, querstabile Bahnen feinfühlig und schonend geführt werden können.The invention has for its object to provide a device of the type mentioned, with the wide, cross-stable webs can be performed sensitively and gently.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß anstelle des Führungszylinders einer Vorrichtung der eingangs genannten Art, mindestens zwei parallele und gemeinsam verschwenkbare Führungsrollen vorgesehen sind, die quer zur Bahnlaufrichtung beabstandet sind und deren Breite geringer als deren Durchmesser ist.The stated object is achieved in that instead of the guide cylinder of a device of the type mentioned, at least two parallel and jointly pivotable guide rollers are provided, which are spaced transversely to the web running direction and whose width is less than their diameter.

Es wird der zum Korrigieren durch die Führungsrollen beaufschlagte Mittelbereich der Bahn wirksam aber schonend beaufschlagt, da die Führungsrollen zwar die Korrekturkräfte mit günstigen Hebelarmen bezüglich der Stellachse ausüben; jedoch der Bahn zwischen den schmalen Führungsrollen die Möglichkeit belassen wird, sich zu entspannen. Durch die beabstandeten schmalen Führungsrollen werden in Bahn-Querrichtung die Unterschiede zwischen mechanisch stärker beaufschlagten Bahnbereichen und entspannten Bahnbereichen verglelchmäßigt. Außerdem kann die Bahn in den Zwischenräumen zwischen den Führungsrollen die durch das Korrigieren eingeleiteten Belastungen günstiger verteilen. Es tritt kein schädlicher Verzerreffekt mit Faltenbildung mehr auf. Günstig ist, daß in den schmalen Auflagezonen relativ hohe Auflagedrücke möglich sind und jede Führungsrolle ihren korrigierenden Schräglauf fast verlustfrei umsetzt. Zusammenfassend ergeben mehrere beabstandete Führungsrollen mit kurzen Auflagezonen eine bessere und schonendere Führung der Bahn als ein durchgehender Führungszylinder gleicher Gesamtlänge. Die Führungsrollen können bei einer Schrägstellung schlupffrei und relativ zueinander unterschiedlich schnell laufen.The central area of the web acted upon for correction by the guide rollers is acted upon effectively but gently, since the guide rollers exert the correction forces with favorable lever arms with respect to the actuating axis; however, the path between the narrow guide rollers is left with the opportunity to relax. The spaced narrow guide rollers in the transverse direction of the web compensate for the differences between mechanically stressed web areas and relaxed web areas. In addition, the web can distribute the loads introduced by the correction more favorably in the spaces between the guide rollers. There is no longer any harmful distortion with wrinkling. It is favorable that relatively high contact pressures are possible in the narrow contact zones and that each guide roller implements its corrective skew almost without loss. In summary, several spaced-apart guide rollers with short support zones result in better and gentler guidance of the web than a continuous guide cylinder of the same overall length. With an inclined position, the guide rollers can run without slip and at different speeds relative to each other.

Eine zweckmäßige Ausführungsform geht aus Anspruch 2 hervor. Beide Führungsrollen leisten den gleichen Beitrag zur Führung. Sie haben beim Korrigieren einen günstigen Hebelarm bezüglich der Stellachse.An expedient embodiment emerges from claim 2. Both leadership roles make the same contribution to leadership. When correcting, you have a favorable lever arm with respect to the positioning axis.

Eine weitere, besonders vorteilhafte Ausführungsform ist mit den Merkmalen von Anspruch 3 gegeben. Dabei haben sich die relativen Dimensionen besonders bewährt.A further, particularly advantageous embodiment is given with the features of claim 3. The relative dimensions have proven particularly useful.

Speziell für Papier und Wellpappebahnen hat sich die Materialspezifikation gemäß Anspruch 4 als zweckmäßig erwiesen.The material specification according to claim 4 has proven to be expedient especially for paper and corrugated cardboard webs.

Eine baulich einfache und funktionssichere Ausführungsform zum feinfühligen Korrigieren des Bahnlaufs geht aus Anspruch 5 hervor.A structurally simple and reliable embodiment for the sensitive correction of the web run can be seen from claim 5.

Bei der alternativen Ausführungsform gemäß Anspruch 6 können die Führungsrollen voneinander unabhängige Höhenlagen einnehmen und individuell korrigieren.In the alternative embodiment according to claim 6, the guide rollers can assume independent height positions and correct them individually.

Bei der Ausführungsform gemäß Anspruch 7 läßt sich der Auflagedruck der Führungsrolle einstellen bzw. können die Führungsrollen zum Einfädeln oder ggf. sogar bei korrektem Bahnlauf von der Bahn abgehoben werden.In the embodiment according to claim 7, the contact pressure of the guide roller can be adjusted or the guide rollers can be lifted off the web for threading or possibly even with the web running correctly.

Die Baueinheit gemäß Anspruch 8 ist montagetechnisch vorteilhaft. Sie ermöglicht es auch, die Vorrichtung nachträglich an eine Bahnbearbeitungsanlage anzubauen, um diese umzurüsten.The assembly according to claim 8 is advantageous in terms of assembly. It also enables the device to be retrofitted to a web processing system in order to convert it.

Vorrichtungen dieser Art arbeiten üblicherweise mit optischen Kantenfühlvorrichtungen, aus deren Signalen die Korrekturbewegungen abgeleitet werden. Gerade bei der Bearbeitung von Papier und Pappebahnen treten Flusen und Staub auf, die die unerwünschte Neigung zeigen, sich an stationären Teilen abzulagern. Darunter leiden speziell die optischen Kanten-Fühlvorrichtungen. Wenn zum Korrigieren einer in Querrichtung verlaufenden Bahn der Führungszylinder die Bahn auf die stationäre Auflage preßt, ist dies der Korrekturbewegung hinderlich und werden in der gezogenen Bahn Längsspannungen erzeugt. Nach einem weiteren Aspekt der Erfindung, der eigenständige erfinderische Bedeutung hat, wird deshalb bei der Ausführungsform gemäß Anspruch 9 im Sinne der eingangs zitierten Aufgabenstellung eine schonende feinfühlige Korrektur gewährleistet, weil die Druckluft einerseits die üblicherweise vorgesehenen optischen Kanten-Fühlvorrichtungen sauber hält und andererseits den Auflagedruck der Bahn reduziert. Es kann eine Art Luftkissen unter der Bahn entstehen, auf dem die Bahn sowohl in Längsrichtung als auch in Querrichtung leicht gleitet und feinfühliger auf die Korrekturkräfte anspricht. Im Kern zeichnet sich diese Ausführungsform deshalb dadurch aus, daß die beabstandeten Führungsrollen wirkungsvoll arbeiten, während das Luftkissen unterhalb der Bahn den Bewegungswiderstand der Bahn auf der Auflage herabsetzt. Ein unter der laufenden Bahn aufgebautes Luftkissen bringt jedoch auch dann Vorteile, wenn zur Bahnkorrektur mit einem durchgehenden langen Führungszylinder oder mit nur einer Führungsrolle auf die Oberseite eingewirkt wird.Devices of this type usually work with optical edge sensing devices, from whose signals the correction movements are derived. Especially when processing paper and cardboard webs, fluff and dust occur, which show the undesirable tendency to deposit on stationary parts. The optical edge sensing devices in particular suffer from this. When correcting a traverse path of the guide cylinder presses the web onto the stationary support, this hinders the correction movement and longitudinal stresses are generated in the drawn web. According to a further aspect of the invention, which has independent inventive meaning, a gentle, sensitive correction is therefore ensured in the embodiment according to claim 9 in the sense of the task cited at the beginning, because the compressed air on the one hand keeps the optical edge sensing devices normally provided clean and on the other hand the contact pressure the web reduced. A kind of air cushion can arise under the web, on which the web slides easily in both the longitudinal and transverse directions and responds more sensitively to the correction forces. In essence, this embodiment is characterized in that the spaced guide rollers work effectively, while the air cushion below the web reduces the movement resistance of the web on the support. However, an air cushion built up under the running path also has advantages if the surface is acted on with a continuous long guide cylinder or with only one guide roller for the purpose of path correction.

Eine baulich einfache Ausführungsform geht aus Anspruch 10 hervor. Der Düsenschlitz kann sich über die Breite der Auflagezone der Führungsrollen erstrecken oder auch breiter sein, so daß die Bahn über ihre ganze Breite durch die Druckluft beaufschlagt wird. Ist der Führungsschlitz sogar bereiter als die Bahn, dann werden die optischen Kanten-Fühlvorrichtungen an den Bahnkanten sauber gehalten.A structurally simple embodiment emerges from claim 10. The nozzle slot can extend over the width of the support zone of the guide rollers or can also be wider so that the web is acted upon by the compressed air over its entire width. If the guide slot is even wider than the web, the optical edge sensing devices on the web edges are kept clean.

Eine weitere, vorteilhafte Ausführungsform geht aus Anspruch 11 hervor. Hierbei findet eine saubere Druckluftverteilung für eine gleichmäßig entlastende Wirkung statt. Hierbei ist es von großem Vorteil, wenn der Luftverteilkasten an der Unterseite der Auflage vorgesehen ist. Dieser Luftverteilkasten gewährleistet eine Strömungsberuhigung und ein gleichmäßiges Entlasten der Bahn über einen wahlbaren Breitenbereich. Im Luftverteilkasten könnten Regelorgane enthalten sein, mit denen sich die Stärke des Luftkissens oder die Breite des Einwirkbereichs der Druckluft verstellen lassen.Another advantageous embodiment is set out in claim 11. Here, a clean compressed air distribution takes place for a uniform relief effect. It is of great advantage here if the air distribution box is provided on the underside of the support. This air distribution box ensures a calming of the flow and an even relief of the web over a selectable width range. Control devices could be included in the air distribution box, with which the thickness of the air cushion or the width of the area affected by the compressed air can be adjusted.

Beispielhafte Ausführungsformen des Erfindungsgegenstandes werden anhand der Zeichnung beschrieben, wobei der Schutz nicht auf die gezeigten Formen beschränkt bleibt.Exemplary embodiments of the subject matter of the invention are described with reference to the drawing, the protection not being limited to the forms shown.

Es zeigen:

Figur 1
schematisch eine Draufsicht auf eine Vorrichtung zum Führen einer laufenden Bahn,
Figur 2
einen Schnitt in der Ebene II-II von Figur 1,
Figur 3
eine Seitenansicht einer weiteren Ausführungsform und
Figur 4
eine Detailvariante in einem Schnitt ähnlich dem von Figur 2.
Show it:
Figure 1
schematically a plan view of a device for guiding a running web,
Figure 2
2 shows a section in the plane II-II of FIG. 1,
Figure 3
a side view of another embodiment and
Figure 4
a detailed variant in a section similar to that of Figure 2.

Eine Vorrichtung V zum Führen einer laufenden, querstabilen Bahn B, z.B. einer Papierbahn oder einer Wellpappebahn, weist gemäß den Figuren 1 und 2 eine rahmenförmige Baueinheit R auf die in der Laufstrecke der Bahn B montiert ist und von der Bahn B durchsetzt wird. Die Baueinheit R enthält eine untere, quer durchgehende Auflage A, die eine ebene Gleitfläche 4 bildet, seitliche Stützen 2 und einen brückenartig die Bahn B überspannender Träger 3. Die Bahn B läuft in Richtung eines Pfeiles 1. Zumindest eine Kante wird durch eine optische Kanten-Fühleinrichtung F abgetastet, um einen Querverlauf der Bahn B gegenüber der Soll-Laufrichtung feststellen und Korrektursignale erzeugen zu können. Am Träger 3 ist in etwa in der Bahnmitte ein Führungszylinder Z um eine Zylinderachse 5 drehbar gelagert, der im gezeigten Ausführungsbeispiel aus drei quer zur Bahnlaufrichtung 1 nebeneinanderliegenden, parallelen und schmalen Führungsrollen R₁, R₂ R₃ gebildet ist. Die Zylinderachse 5 ist in einem Joch 6 gelagert, das um eine Jochachse 7 auf- und abschwenkbar ist. Die Jochachse 7 liegt parallel zur Zylinderachse 5 und ist in einem Bügel 16 festgelegt, der um eine zur Ebene der Bahn B annähernd senkrechte Stellachse 9 mittels eines am Träger 3 befestigten Antriebs 10 hin- und herschwenkbar ist. Der Antrieb 10, z.B. ein hydraulischer oder pneumatischer Stellzylinder oder ein elektrischer Stellantrieb, greift an einem Ausleger 11 des Bügels 16 an. Der Bügel 16 ist in einer Lagerbuchse 15 um die Stellachse 9 drehbar, wobei die Buchse 15 durch eine Konsole 8 am Träger 3 festgelegt ist. Zwischen dem Ausleger 11 und dem Joch 6 ist eine Be- oder/und Entlastungsvorrichtung 17 für die frei drehbar gelagerten Führungsrollen R₁, R₂, R₃ vorgesehen, z.B. ein kleiner Arbeitszylinder, ein Proportionalmagnet oder eine Feder. Zwischen den Führungsrollen R₁, R₂, R₃ sind Distanzelemente 24 vorgesehen.A device V for guiding a running, cross-stable web B, for example a paper web or a corrugated cardboard web, has, according to FIGS. 1 and 2, a frame-shaped structural unit R which is mounted in the running path of web B and through which web B passes. The assembly R contains a lower, continuous support A, which forms a flat sliding surface 4, side supports 2 and a bridge 3 spanning the web B. The web B runs in the direction of an arrow 1. At least one edge is defined by optical edges -Feeding device F scanned in order to determine a transverse course of the web B with respect to the desired running direction and to be able to generate correction signals. On the carrier 3, a guide cylinder Z is mounted rotatably about a cylinder axis 5 in the middle of the web, which in the exemplary embodiment shown is formed from three parallel and narrow guide rollers R 1, R 2 R 3 lying side by side transversely to the web running direction 1. The cylinder axis 5 is supported in a yoke 6 which is pivotable up and down about a yoke axis 7. The yoke axis 7 lies parallel to the cylinder axis 5 and is fixed in a bracket 16 which can be pivoted back and forth about an adjusting axis 9 approximately perpendicular to the plane of the path B by means of a drive 10 fastened to the carrier 3. The drive 10, for example a hydraulic or pneumatic actuating cylinder or an electric actuator, acts on a cantilever 11 of the bracket 16. The bracket 16 is rotatable in a bearing bush 15 about the actuating axis 9, the bush 15 being fixed to the carrier 3 by a bracket 8. Between the boom 11 and the yoke 6, a loading and / or unloading device 17 is provided for the freely rotatably mounted guide rollers R₁, R₂, R₃, for example a small working cylinder, a proportional magnet or a spring. Spacers 24 are provided between the guide rollers R₁, R₂, R₃.

Die Kanten-Fühlvorrichtung F besteht im vorliegenden Fall aus optoelektronischen Kantenfühlern 12, 13, die zur Anpassung an die Bahnbreite in Richtung der Doppelpfeile 14 verstellbar und zweckmäßigerweise am Träger 3 angebracht sind. Ein nicht dargestellter Antrieb läßt eine Verstellung der Fühler 12, 13 während des Betriebes zu. Die Fühler 12, 13 sind wie der Antrieb 10 und ggf. die Be- oder/und Entlastungsvorrichtung 17 an eine nicht dargestellte, zweckmäßigerweise programmierbare, Steuervorrichtung angeschlossen.In the present case, the edge sensing device F consists of optoelectronic edge sensors 12, 13 which are adjustable in the direction of the double arrows 14 to adapt to the web width and are expediently attached to the carrier 3. A drive, not shown, allows the sensors 12, 13 to be adjusted during operation. The sensors 12, 13, like the drive 10 and possibly the loading and / or unloading device 17, are connected to an expediently programmable control device (not shown).

Die Führungsrollen R₁, R₂, R₃ liegen auf der Oberseite der Bahn B auf und laufen frei mit der Bahn B mit. Mittels der Be- oder/und Entlastungsvorrichtung 17 läßt sich der Auflagedruck einstellen. Ferner können die Führungsrollen R₁, R₂, R₃ mittels der Be- oder/und Entlastungsvorrichtung 17 von der Auflage A abgehoben werden.The guide rollers R₁, R₂, R₃ lie on the top of the web B and run freely with the web B. The contact pressure can be adjusted by means of the loading and / or unloading device 17. Furthermore, the guide rollers R₁, R₂, R₃ can be lifted off the support A by means of the loading and / or unloading device 17.

Die Auflage A besitzt einen Düsenschlitz 18, durch den mittels eines eine Druckquelle P darstellenden Druckgebläses 19 Druckluft von unten an die Bahn B führbar ist. Die Druckluft reinigt die Kanten-Fühlvorrichtung F und entlastet die Bahn B auf der Auflage A. Gegebenenfalls wird ein Luftkissen aufgebaut, das ein leichtes Gleiten der Bahn B ermöglicht.The support A has a nozzle slot 18 through which compressed air can be fed from below to the web B by means of a pressure blower 19 representing a pressure source P. The compressed air cleans the edge sensing device F and relieves the web B on the support A. If necessary, an air cushion is built up which enables the web B to slide easily.

Verläuft die Bahn B in Figur 1 aus der Soll-Laufrichtung, dann erzeugen die Fühler 12, 13 nach Überschreiten eines Toleranzbereiches ein Korrektursignal, aufgrund dessen der Antrieb 10 die Führungsrollen R₁, R₂, R₃ um die Stellachse 9 verschwenkt. Die Führungsrollen R₁, R₂, R₃ leiten Korrekturkräfte in die laufende Bahn B ein, bis diese wieder in die Soll-Laufrichtung zurückgekehrt ist. Die Auslenkung der Führungsrollen R₁, R₂, R₃ um die Stellachse 9 wird dabei zurückgenommen.Runs the path B in Figure 1 from the target direction, then the sensors 12, 13 generate a correction signal after exceeding a tolerance range, due to which the drive 10 pivots the guide rollers R₁, R₂, R₃ about the actuating axis 9. The guide rollers R₁, R₂, R₃ introduce correction forces into the running web B until it has returned to the desired running direction. The deflection of the guide rollers R₁, R₂, R₃ about the adjusting axis 9 is reduced.

Bei der Ausführungsform gemäß Figur 3 weist die Auflage A Perforierungen 21 auf, die eine Verbindung von einem unterseitigen Luftverteilkasten 20 zur Unterseite der Bahn B herstellen, so daß ein Luftkissen K unterhalb der Bahn B erzeugbar ist. An den Luftverteilkasten ist ein Druckgebläse 19 angeschlossen. Falls erforderlich, kann die Wirkgröße des Luftkissens durch im Luftverteilkasten unterhalb der Auflage A angeordnete Schieber verändert werden.In the embodiment according to FIG. 3, the support A has perforations 21 which establish a connection from an air distribution box 20 on the underside to the underside of the web B, so that an air cushion K can be produced below the web B. A pressure blower 19 is connected to the air distribution box. If necessary, the effective size of the air cushion can be changed by means of slides arranged in the air distribution box below the support A.

Bei der Ausführungsform von Figur 4 sind die Führungsrollen R₁, R₂, R₃ auf eigenen, kurzen Achsen 5a, 5b, 5c gelagert, die mit Halterungen 22 an der Jochachse 7 schwenkbar gehaltert und durch Distanzelemente 23 auf Abstand gesetzt sind.In the embodiment of Figure 4, the guide rollers R₁, R₂, R₃ are stored on their own short axes 5a, 5b, 5c, which are pivotally supported with brackets 22 on the yoke axis 7 and are spaced apart by spacers 23.

Die Breite b der Führungsrollen R₁, R₂, R₃ beträgt annähernd 30 % des Durchmessers d. Bei drei Führungsrollen R₁, R₂, R₃ beträgt der gegenseitige Abstand a₂ annähernd die Breite b. Sind hingegen nur zwei Führungsrollen R₁ und R₂ vorgesehen, dann sind diese mit dem Abstand a₁ beabstandet, der annähernd dem Durchmesser d entspricht. Für jede Halterung 22 kann eine eigene Be- oder/und Entlastungsvorrichtung 17 zum Be- und Entlasten vorgesehen sein.The width b of the guide rollers R₁, R₂, R₃ is approximately 30% of the diameter d. With three guide rollers R₁, R₂, R₃, the mutual distance a₂ is approximately the width b. However, if only two guide rollers R₁ and R₂ are provided, then these are spaced apart by the distance a₁, which corresponds approximately to the diameter d. A separate loading and / or unloading device 17 for loading and unloading can be provided for each holder 22.

Die Führungsrollen R₁, R₂, R₃ bestehen aus Kunststoff und weisen eine zylindrische Umfangsfläche auf, die glatt und trotzdem griffig ist. Im Hinblick auf eine geringe Massenträgheit sind die Führungsrollen R leicht und mit Speichen geformt. Gegebenenfalls sind die Distanzelemente 23 angeformt. Innenliegende Gleitlager sorgen für die leichte Drehbarkeit der Führungsrollen.The guide rollers R₁, R₂, R₃ are made of plastic and have a cylindrical circumferential surface that is smooth and yet has a good grip. With a view to low inertia, the guide rollers R are light and shaped with spokes. If necessary, the spacer elements 23 are molded on. Internal slide bearings ensure that the guide rollers can be easily rotated.

Aus Stabilitätsgründen kann die Baueinheit R mit zwei nebeneinanderliegenden Trägern 3 ausgebildet sein. Denkbar ist es ferner, an den Halterungen 22 in Figur 3 Be- oder Entlastungsgewichte verstellbar anzuordnen.For reasons of stability, the structural unit R can be formed with two supports 3 lying next to one another. It is also conceivable to arrange loading or relief weights on the brackets 22 in FIG.

Claims (11)

  1. Apparatus for guiding a moving, transversely stable web (B), in particular a corrugated-board web or a corrugated-liner web, a paper web or a transversely stable sheeting web, having a stationary rest (A) for the web underside and having at least two parallel guide rollers (R₁, R₂, R₃) which are positioned approximately centrally on the upper side of the web, which are spaced apart transversely with respect to the running direction of the web (1), which are driven by the web (B), and of which the width (b) is smaller than the diameter (d) thereof, it being possible for the guide rollers (R₁, R₂, R₃) to be pivoted back and forth together, by means of a drive (10) about an adjustment spindle (9) which is located approximately perpendicularly with respect to the plane of the web (B) and is arranged in a stationary manner upstream of the guide rollers (R₁, R₂, R₃), as seen in the running direction of the web (1).
  2. Apparatus according to Claim 1, characterized in that the guide rollers (R₁, R₂, R₃) are mounted in a freely running manner on spindles (5a, 5b, 5c) which are located on an imaginary axis (5) which is spaced apart from the adjustment spindle (9).
  3. Apparatus according to Claim 1 or 2, characterized in that the width (b) of each guide roller (R₁, R₂, R₃) corresponds to approximately 30% of its diameter (d), and in that the distance (a₁, a₂) between the guide rollers corresponds approximately to the diameter (d) when there are two guide rollers (R₁, R₂) and corresponds approximately to the width (b) of a guide roller when there are three or more guide rollers (R₁, R₂, R₃).
  4. Apparatus according to at least one of Claims 1 to 3, characterized in that the guide rollers (R₁, R₂, R₃) consist of plastic and exhibit a smooth, non-slip circumferential surface.
  5. Apparatus according to at least one of Claims 1 to 4, characterized in that the guide rollers (R₁, R₂, R₃) are mounted on the preferably continuous axis (5) and are spaced apart by spacer elements (23), in that the axis (5) is retained in a yoke (6) which can be pivoted up and down about a yoke spindle (7), the yoke spindle (7) being parallel to the axis (5), and the yoke spindle (7) being retained by a bracket (16) which can be pivoted about the adjustment spindle (9) by means of the drive (10).
  6. Apparatus according to at least one of Claims 1 to 4, characterized in that each guide roller (R₁, R₂, R₃) is mounted on a separate short spindle (5a, 5b, 5c) which can be pivoted up and down on the yoke spindle (7) by way of a securing means (22) and, if appropriate, can be subjected to, and relieved of, loading independently.
  7. Apparatus according to at least one of Claims 1 to 6, characterized in that an extension arm (11) is arranged on the bracket (16), and in that a loading and/or load-relieving device (17) for the guide rollers (R₁, R₂, R₃) is arranged between the extension arm (11) and the yoke (6) and/or the securing means (22).
  8. Apparatus according to at least one of Claims 1 to 7, characterized in that the adjustment spindle (9), with the drive (10), is arranged on a stationary bridge which spans the web (B) and forms a frame-like structural unit (R) with the rest (A), which is designed as a transversely running planar sliding surface (4).
  9. Apparatus according to Claim 1 or 8, characterized in that the rest (A), remote from the web underside, can be exposed to compressed air, and in that a compressed-air through-passage to the web underside is provided at least over the width of the bearing zone of the guide rollers (R₁, R₂, R₃).
  10. Apparatus according to Claim 9, characterized in that the rest (A) exhibits at least one nozzle slit (18).
  11. Apparatus according to Claim 9, characterized in that the rest (A) is designed to be perforated with through-passages (21) at least in the region of the bearing zone.
EP92109280A 1991-06-17 1992-06-02 Device for guiding a laterally stable web Expired - Lifetime EP0519261B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9107437U 1991-06-17
DE9107437U DE9107437U1 (en) 1991-06-17 1991-06-17 Device for guiding a transversely stable track

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EP0519261A1 EP0519261A1 (en) 1992-12-23
EP0519261B1 true EP0519261B1 (en) 1995-09-06

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EP (1) EP0519261B1 (en)
JP (1) JPH0616297A (en)
CA (1) CA2071324C (en)
DE (2) DE9107437U1 (en)
ES (1) ES2077296T3 (en)

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Also Published As

Publication number Publication date
CA2071324A1 (en) 1992-12-18
ES2077296T3 (en) 1995-11-16
EP0519261A1 (en) 1992-12-23
DE59203539D1 (en) 1995-10-12
DE9107437U1 (en) 1991-08-22
CA2071324C (en) 1998-05-19
US5421500A (en) 1995-06-06
JPH0616297A (en) 1994-01-25

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