EP1252083B1 - Method and device for producing reels consisting of a large number of flat objects - Google Patents

Abstract

For improving the quality of rolls (4), in which a large number of flat articles (2) are wound onto a roll core with the help of a winding tape (5), a local additional pressure force is exerted on the periphery of the roll (4) under formation during the winding process. For this purpose, the winding device which in a known manner comprises a means for holding a roll core (1), a means for supplying the articles (2) to a winding point (3) on the periphery of the roll core (1) or of the roll (4) under formation respectively, a means for feeding-in the winding tape (5) under tension to the winding point (3) and a drive for rotating the roll core (1) or of the roll (4) under formation, further comprises at least one means (6) for generation the additional pressure force. This means (6), for example, comprises a pressure roller (20), a pressure lever (21) and a compression drive (22) and advantageously is arranged in such a manner, that the compression zone is situated relative to the winding direction by 15° to 60° behind the winding point (3).

Description

The invention relates to a method and a device according to the preambles of the corresponding independent claims 1 and 8. Method and device are used for the manufacture of coils from a large number of flat objects, in particular of printed products.

Printed products (e.g., intermediates starting from printing press) are used for transportation and intermediate storage often wrapped in a shingled formation winding. Also for other flat, at least limited flexible objects, for example For textile articles, such winding advantageous transport and / or Represent storage formations.

The named rolls have a substantially cylindrical winding core and at least one winding tape, wherein the winding tape in a tensioned state along with the shingled formation of the flat objects on the Winding core is wound and this holds together. The end of the wrap band can be closed around the finished roll or in any other suitable way be fixed. The wrapping tape usually has a width that is significantly smaller is the width of the wound objects. Printed products are mostly in Scaly formation wound up; but it is quite possible, this one behind the other arranged, that is, to wind each other not overlapping.

In the printing industry usual, such rolls have diameters up to about two meters and can weigh over a ton. The wound products are for example, about 30 to 50 cm wide and scaled so that the product spacing is about 10 cm or less. Usual wrap bands are about 5 to 10 cm wide

To produce the winding winding devices are used, the essential Ingredients which are: means for holding a winding core (usually with horizontal winding axis), means for feeding the scale formation the flat objects to a winding point at the periphery of the winding core or a resulting coil, means for orderly feeding, the tensioned Winding tape to the winding point and a winding center or other winding peripherally extending drive for a rotation of the Winding core or of the resulting coil with a substantially constant Circumferential speed. Such winding devices are described for example in the publications EP-0243838 (or US-4775111), EP-0281790 (or US-4898336), or US-4523751, the preamble the independent claims 1 and 8 corresponds.

The means for supplying the scale formation have, for example, a pair of Conveyor belts which are substantially tangential to the winding point (e.g., area the lower vertex of the winding core, or the resulting roll) lead and on which the scaly formation of the objects is conveyed loosely becomes. The wrapping tape, for example, between the two feed belts fed, such that the scale formation between winding band and developing Winding is performed in the winding point. In the winding point, in which the supplied objects are successively added to the winding takes over the tensioned winding band the radial pressing of the objects in the winding, optionally somewhat supported by a corresponding, for example, the feeding means applied pressing force in the areas of the winding point.

To adapt the winding device to the growing diameter of the resulting Wickels is pivoted either the supply means or the axis of the hub is moved accordingly. The drive for winding For example, it engages the winding core or at the periphery of the resulting Wickels in the area of the winding tape.

To Wiedererstrellung the scaly formation from a wrap, that is to Unwind, the winding device is essentially opposite to the winding process operated, wherein the winding rotation, for example, by active peeling the winding tape is generated.

It turns out that the above-described winding and its manufacture and dissolution the more problematic the smaller and more regular the thickness of the objects The less compressible the objects are and the less tight the scaling is. In winding relatively thick, compressible and / or tightly shingled printed products The winding tape creates a constriction such that the products are at least in the outer layers of the resulting roll to the outside around the Bend tape and the winding in the area of its front sides a larger extent than in the central area, where it is held together by the winding tape. Is it in addition to products that are thicker on one side than on the On the other hand, there is still an asymmetry to constrict such that the two End faces of the coil have different diameters.

The phenomena mentioned can create problems by causing the winding Destabilize, in that the objects in the wrap take damage or because of the deformation in a scale formation created from the winding again not stable and / or in that it becomes difficult, the peripheral speed of an emerging or degraded roll at the speed of a Feeding or routing of the scaly formation adapt. The mentioned Problems are particularly known in the printing industry for winding relatively thick, twice folded printed products, the second fold in the winding is aligned parallel to the winding axis, such that on the one end of the Wickels unfolded product edges (smaller thickness) and on the other front side of the wrap the first fold of the products, so folded product edges (larger Thickness), lie one on top of the other. Such products are, for example, twice folded Newspapers or sections of newspapers.

The invention now has the object, method and apparatus for the production of winding from a large number of flat objects to improve in such a way that the above problems occur less so that too relative thick, relatively compressible and / or irregular, in particular one-sided thick Objects with better results can be wound up into coils, too if they are as a narrow scale formation, ie with small distances between to be wound up adjacent objects.

This object is achieved by the method and the device, as in the independent claims are defined.

According to the invention, the flat objects are in a resulting winding during the winding process not only by the tensioned winding tape (central Area) and their own stiffness (lateral areas) pressed against the winding core, but they are temporarily exposed to an additional pressing force. The additional pressing force acts locally during the wrapping process in one of the Winding point spaced, substantially stationary pressing area on the periphery of the resulting coil and has a component in the direction of the winding radius. The additional pressing force, for example, over the entire winding width be exercised, but is advantageously limited to peripheral areas next to the winding tape to the edge of the winding end faces. Advantageously located the pressing area in the winding direction behind the winding point, such that by the additional pressing force pressed objects soon after in the winding point arrive and is covered by another winding layer.

It turns out that in the case of two-folded paper products, like them Newspaper or newspaper sections, a temporary press with one additional pressing force of the order of a few hundred Newton (approx. 200 to 1000N) is surprisingly effective. The additional pressing force, for example generated by means of a pressed to the periphery of the resulting coil, passively rotating press roll whose axis is aligned parallel to the winding axis and spaced, for example in the winding direction before the winding point and from this is arranged. It turns out that with the inventive additional Press wound wound coil wound tight and thus are more stable. this shows For example, remember that they have less decks when on their periphery be positioned upright. It also turns out that such wound coils can be handled more easily and that products are wound from such Winding when unwinding and subsequent editing are easier.

In the case of winding folded printed products, the beneficial effect of according to the invention additional pressing force, which when winding on the outermost each Winding layer attacks and over this also on lower in the winding positioned layers works, probably at least partially irreversible or at least not immediately reversible pressing of the folded edges, in particular of the second fold and a attributed the same kind of compression (squeezing air) of the products, such that the products of a next winding layer already in the recording in the Winding, so less deformed at the first pressing by the winding tape as this is the case without the additional pressing force.

The additional pressing force of the inventive method is particularly advantageous for making windings, so for winding operations. But she can equally be used for unwinding operations.

Figur 1

eine beispielhafte Ausführungsform der erfindungsgemässen Vorrichtung zur Herstellung von Wickeln von flächigen Gegenständen mit Blickrichtung parallel zur Wickelachse;

Figuren 2 und 3

schematische Darstellungen von zwei weiteren, beispielhaften Ausführungsformen der erfindungsgemässen Vorrichtung, ebenfalls mit Blickrichtung parallel zur Wickelachse;

Figuren

4 und 5 zwei beispielhafte Ausführungsformen von Mitteln zur Erzeugung der zusätzlichen Presskraft (Blickrichtung senkrecht zur Wickelachse).

With reference to the following figures, some exemplary embodiments of the inventive method and the inventive device will be described in detail. Showing:

FIG. 1

an exemplary embodiment of the inventive device for producing winding of flat objects with a view parallel to the winding axis;

FIGS. 2 and 3

schematic representations of two further exemplary embodiments of the inventive device, also with a view parallel to the winding axis;

characters

4 and 5 show two exemplary embodiments of means for generating the additional pressing force (viewing direction perpendicular to the winding axis).

FIG. 1 shows, viewed in a direction parallel to the winding axis A, an exemplary embodiment of the device according to the invention. It is a substantially known winding device, of which only the essential components are shown, namely a means for holding a winding core 1, a means for feeding the flat objects 2 to a winding point 3 at the periphery of the winding core 1 or a resulting Wickels 4, means for supplying and tensioning the winding tape 5 and a drive, not shown, through which the winding core 1 and the resulting winding 4 is driven to rotate in the arrow direction. Newly, the winding device has means 6 for generating an additional pressing force on the winding periphery of a coil 4 formed in the device.

As a means for holding a winding core 1 is a to a fixed core pivot point 10 pivotable core arm 11 is provided, on which the winding core 1 to the Winding axis A is rotatably arranged. As a means for supplying the flat objects 2 to the winding point 3 is a pair of parallel running and from each other arranged spaced conveyor belts 12 are provided, of which only the conveying strand is shown. On these conveyor belts 12, the objects 2, for example fed loose in a shingled formation. As a means for feeding and tensioning the winding tape 5 is a braked rotatable winding tape roll 13 and a band deflection roller 14 is provided. To support the pressing The objects in the winding point 3 can be arranged in this area a roller 15 be, with the help of the conveyor belts 12 and thus the supplied items 2 and the winding tape 5 against the winding core 1, or to the resulting Wraps 4 are pressed.

The means 6 for generating the additional pressing force has, for example Press roller 20, a pressing lever 21 and a press drive 22, such, for example are arranged on a device frame, not shown, that the press drive 22, the press roller 20 by means of pressing lever 21 against the periphery of in the device resulting coil 4 is pressed and that advantageously in one Pressing area, which lies in the winding direction behind the winding point 3. If the Winding point 3 in the region of the lower vertex of the resulting coil 4th is, so in about 6 o'clock, and the winding direction aligned in a clockwise direction is, the pressing area is advantageously, as shown in Figure 1, approximately in a position between 4 and 5 o'clock, if necessary 5 o'clock 30, thus around one Angle of about 15 to 60 ° from the winding point 3 spaced.

The press drive 22 is, for example, one about a fixed drive pivot point 23rd freely pivotable arranged, for example, hydraulically operated piston / cylinder unit, in which the pressure is regulated as needed or a constant Pressure is maintained. The pressing lever 21 is for example pivotable arranged a fixed lever pivot point 24, has a freely movable hinge 25th on and is between hinge 25 and lever pivot point 24 with the piston / cylinder unit 22 articulated. At the lever pivot point 24 opposite Lever end is the press roller 20 arranged freely rotating. The roll-carrying Lever end or the press roller 20 is through an approximately parallel to the feed belts 12 aligned guide 26 out. The guide 26 is schematic indicated by a dash-dotted line.

A winding process with the winding device shown in Figure 1 runs as follows:

At the beginning of the winding process, the winding core is in its designated 1 ' and dash-dotted line position. The winding tape 5 is on the winding tape roll 13 wound and its beginning is attached to the periphery of the winding core 1. The press drive 22 is in a fully extended state or presses the Press roller against an end stop of the guide 26, advantageously such that the press roller 20 is slightly spaced from the winding core 1 (dash-dotted lines and 20 'position of the press roller). As soon as the first layers of 2 objects are wound on the winding core 1, the press roller 20 starts the exert extra pressing force while being on the periphery of the resulting Windels 4 rolls off. As the winding process progresses, the winding diameter becomes bigger and moves the winding core 1 against the top. At the same time the press roll Pressed 20 in the guide 26 against the right, the pressing force about the same remains.

Figur 1 zeigt auch eine dritte Position der Pressrolle 20 und des Presshebels 21, strichpunktiert dargestellt und mit 20" und 21" bezeichnet. Diese Position wird erreicht, wenn die Kolben/Zylinder-Einheit vollständig eingefahren ist, und dient dazu, die Pressrolle beispielsweise für das Abwickeln aus dem Bereich des Wickels 4 zu entfernen.

Figuren 2 und 3 zeigen mit gleicher Blickrichtung wie Figur 1, aber bedeutend schematischer als diese, zwei weitere beispielhafte Ausführungsformen der erfindungsgemässen Vorrichtung. Die Bestandteile der Vorrichtung sind im wesentlichen dieselben wie diejenigen der Vorrichtung gemäss Figur 1 und sind auch mit denselben Bezugsziffern bezeichnet.

Figur 2 zeigt eine Ausführungsform der erfindungsgemässen Vorrichtung mit zwei Pressbereichen, einer vor und einer hinter dem Wickelpunkt 3. Die beiden Mittel 6.1 und 6.2 zur Erzeugung der zusätzlichen Presskraft weisen wiederum je eine Pressrolle 20.1 und 20.2 auf, je einen Presshebel 21.1 und 21.2 und einen Pressantrieb in Form einer Pressfeder 30.1 und 30.2, die den Presshebel 21.1 bzw. 21.2 gegen die Wickelkern 1 bzw. gegen den entstehenden Wickel 4 treibt und zur Erzeugung der zusätzlichen Presskraft an diesen anpresst.

Figur 3 zeigt ein Mittel 6 zur Erzeugung der zusätzlichen Presskraft, das eine Mehrzahl von Pressrollen 20.3, 20.4, 20.5 aufweist. Damit sich die Anordnung von Pressrollen 20.3, 20.4, 20.5 an die während dem Wickelvorgang abnehmende Krümmung der Wickelperipherie anpassen kann, weist sie einen gelenkigen Rollenträger 31 auf, der durch eine Vorspannfeder 32 vorgespannt ist.

Figuren 4 und 5 zeigen zwei weitere beispielhafte Ausführungsformen von Mitteln 6 zur Erzeugung der zusätzlichen Presskraft mit Blickwinkel senkrecht zur Wickelachse A. Dargestellt sind je ein Wickel 4 mit Wickelband 5 und von den Mitteln zur Erzeugung der zusätzlichen Presskraft Pressrollen 20 und Teile von Presshebeln (21, 210, 210') und Pressrollenführungen (26).

Figur 4 zeigt eine Pressrolle 20 mit einer axialen Länge, die mindestens so gross ist wie die Breite der aufgewickelten Gegenstände 2, und mit einem zentralen Bereich 40 mit reduziertem Durchmesser. Dieser zentrale Bereich hat eine axiale Ausdehnung, die mindestens so gross ist wie die Breite des Wickelbandes 5. Der Presshebel 21 ist als Gabel ausgebildet und weist auf jeder Seite des Wickels 4 einen die Pressrolle 20 tragenden Presshebelteil 210 und 210' auf. Durch den reduzierten, zentralen Bereich 40 der Pressrolle 20 wird dafür gesorgt, dass die zusätzliche Presskraft nur auf seitliche Bereiche der Wickelperipherie und nicht auf das Wickelband 5 wirkt.

Figur 5 zeigt von einem Mittel 6 zur Erzeugung der zusätzlichen Presskraft eine zweiteilige Pressrolle 20, deren Teilrollen 200 und 200' voneinander unabhängig betätigt werden. Die beiden Teilrollen 200 und 200' sind im wesentlichen koaxial angeordnet und je über einen Achsstumpf frei drehbar an den Presshebelteilen 210 und 210' montiert. In diesem Falle ist für jeden Presshebelteil 210 und 210' ein eigener Pressantrieb (nicht dargestellt) vorgesehen, derart, dass die Pressung durch die beiden Teilrollen 200 und 200' voneinander entkoppelt ist.

The extended positions of the winding core 1 and the press roller 20 illustrate approximately the end of the winding process.

Figure 1 also shows a third position of the press roller 20 and the pressing lever 21, shown in phantom and denoted by 20 "and 21". This position is achieved when the piston / cylinder unit is fully retracted, and serves to remove the press roller, for example, for unwinding from the area of the coil 4.

Figures 2 and 3 show, with the same viewing direction as Figure 1, but much more schematically than these, two further exemplary embodiments of the inventive device. The components of the device are essentially the same as those of the device according to Figure 1 and are also designated by the same reference numerals.

Figure 2 shows an embodiment of the device according to the invention with two pressing areas, one in front and one behind the winding point 3. The two means 6.1 and 6.2 for generating the additional pressing force in turn each have a press roller 20.1 and 20.2, one pressing lever 21.1 and 21.2 and one Press drive in the form of a compression spring 30.1 and 30.2, which drives the pressing lever 21.1 and 21.2 against the winding core 1 and against the resulting winding 4 and presses to generate the additional pressing force to this.

Figure 3 shows a means 6 for generating the additional pressing force, which has a plurality of press rollers 20.3, 20.4, 20.5. Thus, the arrangement of press rollers 20.3, 20.4, 20.5 can adapt to the decreasing during the winding process curvature of the winding periphery, it has a hinged roller carrier 31, which is biased by a biasing spring 32.

Figures 4 and 5 show two further exemplary embodiments of means 6 for generating the additional pressing force with a view perpendicular to the winding axis A. Shown are each a winding 4 with winding tape 5 and the means for generating the additional pressing force press rollers 20 and parts of pressing levers (21 , 210, 210 ') and press roller guides (26).

Figure 4 shows a press roll 20 having an axial length which is at least as large as the width of the wound objects 2, and having a central area 40 of reduced diameter. This central region has an axial extent which is at least as great as the width of the winding band 5. The pressing lever 21 is designed as a fork and has on each side of the roll 4 a press lever part 210 and 210 'supporting the press roll 20. By the reduced, central portion 40 of the press roller 20 is ensured that the additional pressing force acts only on lateral areas of the winding periphery and not on the winding tape 5.

FIG. 5 shows, from a means 6 for generating the additional pressing force, a two-part pressure roller 20 whose partial rollers 200 and 200 'are actuated independently of one another. The two sub-rollers 200 and 200 'are arranged substantially coaxially and each freely rotatably mounted on the Presshebelteilen 210 and 210' via a stub axle. In this case, a separate press drive (not shown) is provided for each press lever part 210 and 210 ', such that the pressure is decoupled from one another by the two part rollers 200 and 200'.

The press roller arrangement shown in FIG. 5 is particularly suitable for the Production of wrappings of flat objects on both sides of the Wickelbandes have different thicknesses, so for example for the production of wrapping from double-folded printed products.

The press rollers, as shown in Figures 4 and 5 are, for example applicable in the devices, as shown in Figures 1 to 3. she can also be combined with each other.

Claims (14)

1. Method for producing rolls (4) from large numbers of flat articles (2), wherein a roll core (1) or a roll (4) under formation is driven in rotation, wherein the articles are supplied to a winding point (3) on the circumference of the roll core (1) or the roll (4) under formation respectively, wherein at least one winding tape (5) is fed into the winding point (3) in a tensioned condition and wherein the supplied articles (2) together with the tensioned winding tape (5) are wound onto the roll core (1) in a multitude of winding layers arranged one on top of the other, characterized in that during the winding process, an additional pressure force is exerted in a compression zone of the periphery of the roll (4) under formation by a pressing means (6) rolling passively on the periphery of the roll, wherein the compression zone is situated at a distance from the winding point (3) and wherein the additional pressure force comprises a component in the direction of the winding radius.
2. Method in accordance with claim 1, characterized in that the pressure force is exerted in such a manner, that it acts on the periphery of the roll solely beside the at least one winding tape (5).
3. Method according to one of claims 1 or 2, characterized in that additional pressure forces are exerted in a plurality of compression zones.
4. Method in accordance with one of claims 1 to 3, characterized in that the compression zone is situated relative to a winding direction behind the winding point (3) in such a manner, that the additional pressure force acts on an outermost winding layer before it is covered by a further winding layer at the winding point.
5. Method according to one of claims 1 to 4, characterized in that the additional pressure force is exerted by a pressure roller passively rolling-off on the periphery of the roll.
6. Method in accordance with one of claims 1 to 5, characterized in that the articles (2) are supplied in an imbricated formation.
7. Method according to one of claims 1 to 6, characterized in that the additional pressure force in the at least one compression zone amounts to 200 up to 1000 N.
8. Device for producing rolls (4) from large numbers of flat articles (2), the device comprising means for holding the roll core (1), means for supplying the articles (2) to a winding point (3) situated on the periphery of the roll core (1) or of the roll (4) under formation, means for feeding-in at least one winding tape (5) under tension to the winding point (3) and means for driving the roll core (1) or the roll (4) under formation in rotation, characterized in that the device further comprises at least one pressing means (6) for generating an additional pressure force, which pressing means (6) is designed to roll passively on the periphery of the roll and for the additional pressure force to act in a compression zone of the roll periphery being located at a distance from the winding point (3) and to comprise a component in the direction of the roll radius.
9. Device according to claim 8, characterized in that the at least one compression zone is situated relative to the winding direction behind the winding point (3) and is distanced form the winding point by 15° to 60°.
10. Device in accordance with claim 8 or 9, characterized in that the pressing means (6) for generating the additional pressure force comprises at least one pressure roller (20) having an axis substantially parallel to the roll axis (A), at least one pressure lever (21), on which the pressure roller (20) is arranged freely rotating, and at least one pressure drive (22).
11. Device according to claim 10, characterized in that the pressure drive (22) is a piston/cylinder unit or a spring (30.1, 30.2).
12. Device in accordance with claim 10, characterized in that the pressure roller (20) has an axial length, which is at least as great as the width of the articles (2), and a central zone (40) with a reduced diameter, which central zone (4) has an axial extent, which is at least as great as the width of the winding tape (5).
13. Device according to claim 10 or 11, characterized in that the pressure roller (2) comprises a pair of partial rollers (200, 200'), the partial rollers being arranged substantially coaxially and independent of one another each one being actively connected with an own pressure lever and an own pressure drive.
14. Use of the method in accordance with one of claims 1 to 7 or of the device according to one of the claims 8 to 13 for producing rolls from folded printed products.

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