EP0933320A2 - Reel winder - Google Patents

Abstract

A roll winder (1) is specified with a roll holder (4) which holds a winding roll (3) in the region of its axis of rotation and with a support device (6). One would like to solve the support of a winding roll differently. For this purpose, the support device (6) has a plurality of roller bodies (7-10), the axes of which run parallel to the axis of rotation of the winding roller (3) and which are combined to form roller pairs (12, 13), each roller pair (12, 13) about an axis (14, 15) is pivotable, which runs parallel to the axis of rotation. <IMAGE>

Description

The invention relates to a roll winder with a Roll holder that has a winding roll in the area of your Axis of rotation holds, and a support device.

Such roll winders are used to create a material web to wind up a winding roll or a material web unwind from a winding roll. The invention is shown below using a paper web as an example described for a material web. But it is in same way for other material webs, for example Cardboard or plastic or metal foils, applicable.

Roll winder that has a roll in the area of its axis of rotation hold, require a certain roll diameter Support of the winding roll because the winding roll otherwise under the influence of their own weight would bend strongly. This can damage the Guide material web.

However, the support of the winding roll leads to that Problem that the contact pressure has an impact on the Winding hardness takes. Especially when winding up this can lead to undesirable results. One likes to basically achieve that the winding hardness from the inside decreases towards the outside. Reduced with increasing contact pressure however, the winding hardness changes from the inside out, so that the reverse effect is achieved.

There are already some suggestions to solve this problem been made. One suggestion is that the winding roll is supported on an air cushion. This solution is relatively energy intensive. Another Solution is that you have the winding roll on a wraps around the belt between two pulleys is spanned. This solution sometimes requires considerable Wear.

The invention is based, the support to solve a winding roll differently.

This task is the beginning of a roll winder mentioned type solved in that the support device has several rolling elements whose axes are parallel to The axis of rotation of the winding roll runs and the pairs of rolls are summarized, with each pair of roles around an axis is pivotable, which is parallel to the axis of rotation runs.

The winding roll is therefore always on several rolls supported, so that the contact force on several Support areas distributed. Accordingly, the remains resulting contact pressure in reasonable Limits. Because the pairs of roles in turn again are pivotable, they automatically pose this way a that they adapt to the circumference of the winding roll. This ensures that the winding roll always lies on all rolling elements. With smaller ones Diameters of the winding roll are individual Rollers loaded differently. But this is not critical because with a smaller diameter the weight the roll is also smaller and the contact pressure therefore remains small. The larger the diameter the winding roll will be the more even all rolling elements loaded, so take part in the division part of the circulation. This will make the force pro Limited support area.

There are preferably two pairs of rollers on one pivotable swing arm arranged, its pivot axis runs parallel to the axis of rotation. The swing arm allows even then a largely uniform support of the Winding roll through the roll body when the winding roll is not symmetrical between the pairs of rollers. In this case, the swing arm can be something tend. Of course, you can also provide several wings, which then due to their pivotability can adapt to the diameter of the winding roll.

The pairs of rollers advantageously point in the direction of gravity Swing arm located below the roller a distance from each other at which the respective outer Rollers less than 800 mm apart are. The size of 800 mm was chosen because the weight load from this diameter usually becomes so large that support is necessary is. If the two outer rolling elements less when these are 800 mm apart, it is ensured that from this diameter when winding or up to this diameter during processing Winding roll is supported by all pairs of rolls.

The rocker is advantageously arranged on a carrier, the one running parallel to the axis of rotation Swivel axis is pivotable. This arrangement has advantages in particular if the axis of rotation of the winding roll remains in one level, for example, if the roll holder is arranged stationary. In this case can be done by swiveling the carrier follow the diameter change up or down.

The pivot axis of the carrier is advantageously stationary. The point of connection of the beam with the Swing arm then describes an arc. You can in in many cases lay the arc so that it is, for example in the event of a settlement the section Corresponds to a circle close to a vertical one Tangent is arranged. In this case remains the support of the winding roll by the rolling body largely symmetrical. In addition, simplified the fixed mounting of the pivot axis of the carrier the construction.

The carrier preferably has a carrier pivot drive on. The carrier swivel drive can be used during processing the rolling body the decreasing diameter of the Adjust the winding roll and make sure that the winding roll is always sufficiently supported. The swivel drive can support the carrier during winding lower to also the desired balance of power adjust.

In an advantageous embodiment, that the distance of the rolling elements within the pairs of rollers and the distance between the support points of the winding roll from the swivel axes of the roller pairs to the distance of the individual swivel axes is coordinated that the winding roll essentially increases in diameter supported symmetrically to its vertical median plane is. Such an embodiment is particularly then advantageous if the support device in a winder is used in which a central roller is provided against which the winding roller at Winding is pressed. The contact pressure against the central roller mainly determines the winding hardness. With increasing diameter, the axis of rotation of the Winding roll from the central roller. The axis of rotation remains but usually in the same horizontal plane like the axis of rotation of the central roller. This leads to, that the lowest point of the winding roll is on a Straight line moved downwards at an angle of 45 °. Of the Carrier that is pivotable about a carrier pivot axis is circular. The winding roll is not on the swing axis of the rocker, but on the rolling elements by this swivel axis are removed on the one hand and still by the swivel axis of the roller pairs are separated. Because of The circular axis becomes the last swivel axis of the carrier by counter-swiveling the roller pairs again somewhat compensated so that the support points of the Winding roll on the roll body so that at least approximately a largely symmetrical load is ensured. This strain can affect certain Diameter ranges of the winding roll are limited, for example in the range of 800 to 1500 mm in diameter.

In a preferred embodiment, the rocker is opposite the carrier by an angle of the order of magnitude pivotable from 50 ° to 100 °. Especially with the You can then wind up a pair of rolls of the support device use the winding sleeve of the winding roll and the winding roller with a small diameter to press against the central roller to the at the beginning of the Set the desired high winding hardness to be able to. Deflection can also occur in this way the winding tube or the winding roller as a result of Web tension as well as the contact pressure of the roll holder small roll diameter can be prevented. In this In case you have to make sure that the pair of roles a substantially horizontal force can exert on the winding roll. The pivotability serves this purpose the swing arm opposite the carrier.

It is preferred that between the carrier and the Swing arm a swing arm drive is arranged. You can with the help of the swing arm drive necessary adjustment of the rocker in relation to the carrier and the necessary force on the winding tube or exercise the winding roller with a small diameter.

In an alternative embodiment, the carrier and the swingarm be rigidly coupled and the carrier is at an angle on the order of 60 to Can be swiveled 100 °. In this case, the necessary Horizontal force due to the pivoting of the beam applied in total. It is true with this configuration no longer ensures that the support the winding roll is always symmetrical. It is much more assume that up to a certain diameter the winding roll is always a force component in Direction to the central roller is present. An approximation symmetrical load and thus an equalization the contact forces only arise with larger ones Diameters of the winding roll where necessary and is desired.

The rolling elements advantageously have an elastic surface on. This surface sets the contact pressures further down and facilitates the automatic adjustment of the rolling element pairs.

It is particularly favorable that the roles of the support device are movable on a path in which they are at Start of winding with a pair of rollers, a winding tube and fix the winding roll that forms on it in its position and after a transition phase the bigger one Winding roll with all pairs of rolls from below support. The support device therefore fulfills several Functions.

Furthermore, it is recommended that the swing arm be so far is relocatable that the finished winding roll ejected becomes. The swing arm can also perform this additional function be given without difficulty.

It is also advantageous that the support device segments having side by side in one of the Width of the number dependent on the web to be wound are. By segmenting it is simple Way possible, different widths of partial webs to consider.

Fig. 1

eine schematische Darstellung eines Rollenwicklers,

Fig. 2

eine zweite Ausgestaltung eines Rollenwicklers für eine Aufwicklung und

Fig. 3

eine dritte Ausgestaltung eines Rollenwicklers für eine Abwicklung.

The invention is described below with reference to preferred embodiments in conjunction with the drawing. Show here:

Fig. 1

a schematic representation of a roll winder,

Fig. 2

a second embodiment of a roll winder for winding and

Fig. 3

a third embodiment of a roll winder for processing.

Fig. 1 shows a roll winder 1 for winding a Material web 2, for example a paper web, to one Winding roll 3. The winding roll 3 is almost here fully wound, i.e. it almost has its largest Diameter reached. The winding roll 3 is one Roll holder 4 held. The roll holder 4 engages from the end faces of the winding roll 3 in a roll core that is not visible here, so it stops the winding roll 3 centrally in the region of its axis of rotation.

The winding roll 3 is when winding against a central roller 5 pressed. The contact pressure against the central roller 5 is one of the main factors influencing the winding hardness the winding roll 3.

From a diameter of approximately 800 mm, the dead weight is the winding roll 3 so large that a support from below is necessary. There is a support for this 6 provided. The support device 6 has several in the present case four, rolling elements 7-10. The Rollers are designed as elongated rollers. she are rotatable about an axis of rotation that is parallel to the axis of rotation the winding roll 3 is. All rolling elements 7-10 have an elastic surface 11, for example can be rubberized.

The rolling elements 7-10 are each pair of rollers 12, 13 summarized. Within each pair of rollers 12, 13 the rolling elements 7, 8 and 9, 10 are rigid with each other arranged. Each pair of rollers 12, 13 is one Pivot axis 14, 15 pivotable relative to a rocker 16, one lever each between the rolling elements and the pivot axis is present and the levers one Include angles of less than 180 °, for example 50 °. The rocker 16 is in turn about a pivot axis 17 pivotally arranged on a carrier 18. The carrier 18 is in turn about a fixed pivot axis 19 pivotable.

The carrier 18 is with a carrier pivot drive 20 .mu.m the pivot axis 19 pivotable so that the Pivot axis 17 an arc around the pivot axis 19 describes around. There is a swing arm drive for the swing arm 21 provided with the help of Swing arm 16 can be pivoted relative to the carrier 18 can.

A winding tube 22 is shown in dashed lines bears against the central roller 5 and of the also dashed shown rolling elements 7, 8 held there becomes. The state is shown in dashed lines of the roll winder at the start of a winding process. For this purpose, the carrier 18 is under the action of the carrier swivel drive 20 is pivoted upwards. The rocker 16 is opposite the carrier pivoted counterclockwise so that the two Rollers 7, 8 on the winding tube 22 to the plant come. The material web 2 can then with a predetermined Contact pressure are wound up, so that sets the desired winding hardness. This wrapping takes place up to a diameter of about 500 mm Support of the rolling elements 7, 8, i.e. under pressure the winding roll 3 by the rolling elements 7, 8 and Roll holder 4 to the central roller 5.

Then the swing arm 16 is pivoted away and the carrier 18 lowered so that the rocker 16 below the winding roll 3 is located. The contact pressure is then generated only by the roll holder 4. The two outer ones Rollers 7, 10 are at a distance from each other, which is at most 800 mm. That way it is possible with the help of the two pairs of rollers 12, 13 Support role at the latest from a point in time where the winding roll 3 has a diameter of 800 mm.

The diameter of the winding roll 3 increases during winding to. The winding roll 3 is in the horizontal plane moved away from the central roller 5. Moved accordingly the lowest point of the winding roll 3 along a plane that is inclined by 45 °, obliquely downwards.

When the roller 7-10 to rest against the winding roll 3 brought, the carrier 18 is raised slightly and lowered again when wrapping. The pivot axis 17th then does not move along the 45 ° plane diagonally downwards, but along a circular arc. But as the diameter of the winding roll increases 3 the pairs of rollers 12, 13 increasingly horizontal the movement of the support points of the winding roll on the rolling elements 7-10 in a good approximation replicated that a largely symmetrical storage the winding roll 3 ensured on the support device 6 is. An exactly symmetrical bearing is in in most cases it cannot and cannot be reached not necessarily required.

The angle that the swing arm 16 make to the beam 18 can depends on the circumstances. It lies in of the order of 50 ° to 100 °.

1. Nachdem die leere Wickelhülse 22 mit Hilfe von Spannköpfen an die Zentralwalze 5 angelegt und der Bahnanfang an der Wickelhülse angeklebt worden ist, wird die Schwinge 16 so verschwenkt, daß die Wickelhülse 22 durch ein Rollenpaar 12 in ihrer Lage fixiert ist. Der erforderliche Druck zum Anpressen an die Zentralwalze 5 wird durch die Spannköpfe und die Rollen 7, 8 des Paares erzeugt. Auf diese Weise kann sich die Hülse 22 während des Anwickelns und danach nicht aufgrund äußerer Kräfte (Bahnzug, Anpreßkraft der Spannköpfe) verbiegen.

2. Nachdem die Wickelrolle 3 einen gewissen Durchmesser, z.B. 500 mm, erreicht hat, wird die Schwinge 16 an die Unterseite der Wickelrolle 3 verschwenkt. Der notwendige Anpreßdruck wird nur noch durch die Spannköpfe aufgebracht.

3. Ab einem Wickelrollendurchmesser von 800 mm übernehmen die Rollenpaare 12 und 13 eine Unterstützung der Wickelrolle 3, bis diese fertig gewickelt ist. Durch die Entlastung der Wickelrolle 3 bei größeren Durchmessern (bis etwa 1.500 mm) werden Spannungsspitzen im Bereich der Spannköpfe in Folge einer Durchbiegung und außerdem eine Mittelpunktsverlagerung wegen des Durchhängens der Papierbahnen verhindert.

4. Sobald der Solldurchmesser erreicht ist, wird der Wickelvorgang angehalten, die Bahn wird getrennt und die Spannköpfe werden aus der Wickelhülse 22 gefahren. Alsdann wird die fertige Wickelrolle 3 durch ein weiteres Verschwenken der Schwinge 16 ausgestoßen.

Overall, the support device with the rocker 16 can therefore perform the following functions with optimal use:

1. After the empty winding tube 22 with the help of clamping heads to the central roller 5 and the beginning of the web has been glued to the winding tube, the rocker 16 is pivoted so that the winding tube 22 is fixed in position by a pair of rollers 12. The pressure required for pressing against the central roller 5 is generated by the clamping heads and the rollers 7, 8 of the pair. In this way, the sleeve 22 can bend during the winding and afterwards not due to external forces (web tension, contact pressure of the clamping heads).

2. After the winding roller 3 has reached a certain diameter, for example 500 mm, the rocker 16 is pivoted to the underside of the winding roller 3. The necessary contact pressure is only applied by the clamping heads.

3. From a winding roll diameter of 800 mm, the pairs of rolls 12 and 13 support the winding roll 3 until it is completely wound. By relieving the winding roll 3 for larger diameters (up to approximately 1,500 mm), tension peaks in the area of the clamping heads as a result of a deflection and also a shift in the center due to the sagging of the paper webs are prevented.

4. As soon as the desired diameter is reached, the winding process is stopped, the web is separated and the clamping heads are moved out of the winding tube 22. Then the finished winding roll 3 is ejected by a further pivoting of the rocker 16.

When this trajectory travels through, the swing arm 16 pivoted about 90 °.

Fig. 2 now shows another embodiment in which same or corresponding parts with 100 increased Reference numerals are provided.

In contrast to the embodiment according to Fig. 1 is here a rigid connection 23 between the rocker 116 and the carrier 118 present. The rocker 116 and the carrier 118 always have the same angle to each other.

The solid support 106 is in solid lines once in its lowest position, at which it is not active, that is to say it is lifted off the winding roll 103 is. Furthermore, the same support device 106 (without reference numerals) with solid lines in shown a position where it is the driven Winding sleeve 122 against the central roller 105, which also has a drive 24, presses. In between are the positions of the support device 106 for two different ones Diameter of the winding roller 103 dashed drawn. It can be seen that with a medium Diameter of the winding roll 103 a support the winding roll through the two of the central roller 105 adjacent rolling elements 109, 110 takes place during the two rolling elements removed from the central roller 105 107, 108 still a significant force component in Apply direction to the center roller 105. If the Winding roller 103 becomes larger, then the support through the support device 106 increasingly symmetrical. The larger the diameter of the winding roll 103, the more The dead weight is also greater and the more even the support forces should be distributed.

2 are the rolling elements 107-110 only on a single double lever attached to the pivot axes 114, 115 is pivotable. This is a somewhat simpler design.

Fig. 3 shows a third embodiment in which the Support device arranged in an unwinder 201 is. The same and corresponding parts are included 1 increased by 200 reference numerals.

It can be seen that the pivot axis 217 on a Circular arc 25 is pivoted about the pivot axis 219. The circular arc 25 has an at least approximately vertical directed tangent. Accordingly, the Support device 206 when unwinding the winding roll 203 essentially symmetrical to a vertical median plane the winding roller 203 are guided. However, it is enough out when the winding roll on both sides this level 26 is supported.

In roll cutting, roll rolls 3 are very different Width wrapped. Because of this, are the wings 16, 116, 216 installed as segments, being in the winding positions in which narrow webs to be wound, only one segment installed and two or three segments for wider webs. The segments are expediently transverse to The web can be shifted to quickly change the position of the winding roll to be adjusted.

The movement path of the rocker is in the exemplary embodiments a curved track, but can in other cases also run linearly.

Claims (14)

Roll winder with a roll holder, the one Holds winding roll in the area of its axis of rotation, and a support device, characterized in that the support device (6, 106, 206) several Rolling body (7-10; 107-110; 207-210), whose Axes parallel to the axis of rotation of the winding roll (3, 103, 203) run and the pairs of roles (12 13, 112, 113, 212, 213) are summarized, each pair of rollers (12, 13, 112, 113, 212, 213) around an axis (14, 15, 114, 115, 214, 215) is pivotable, which runs parallel to the axis of rotation. Roll winder according to claim 1, characterized in that two pairs of rollers (12, 13, 112, 113, 212, 213) on a pivotable Swing arm (16, 116, 216) are arranged, the Swivel axis (17, 117, 217) parallel to the axis of rotation runs. Roll winder according to claim 2, characterized in that the pairs of rollers (12, 13, 112, 113, 212, 213) on the bottom in the direction of gravity the rocker arm (16, 116, 216) arranged one Have a distance from each other at which the outer rolling element (7, 10, 107, 110, 207, 210) from each other by less than 800 mm are. Roll winder according to claim 2 or 3, characterized in that the rocker (16, 116, 216) a carrier (18, 118, 218) is arranged around a pivot axis running parallel to the axis of rotation (19, 119, 219) is pivotable. Roll winder according to claim 4, characterized in that the pivot axis (19, 119, 219) of the Carrier (18, 118, 218) is stationary. Roll winder according to claim 4 or 5, characterized in that that the carrier (18, 118, 218) one Carrier swivel drive (20, 120, 220). Roll winder according to one of claims 4 to 6, characterized in that the distance between the rolling elements (7-10) within the roller pairs (12, 13) and the distance between the support points of the winding roll (103) from the pivot axes (14, 15) of the pairs of rollers (12, 13) so on the distance of the individual Swivel axes (14, 15, 17, 19) is coordinated that the winding roll (3) with increasing diameter in essentially symmetrical to their vertical median plane is supported. Roll winder according to one of claims 4 to 7, characterized in that the rocker (16) opposite the carrier (18) at an angle in the The order of magnitude is pivotable from 50 ° to 100 °. Roll winder according to one of claims 4 to 8, characterized in that between the carrier (18) and the rocker (16) a swing arm drive (21) is arranged. Roll winder according to one of claims 4 to 6, characterized in that the carrier (118) and the rocker (116) are rigidly coupled and the Beam at an angle on the order of 60 can be swiveled up to 100 °. Roll winder according to one of claims 1 to 10, characterized in that the rolling elements (7-10, 107-110, 207-210) an elastic surface (11) exhibit. Roll winder according to one of claims 1 to 11, characterized in that the roles of the support device (6, 106, 206) movable on a track are in which they start with a pair of rolls (12, 112) a winding tube (22) and the fix the winding roll that forms on it in its position and after a transition phase the bigger one winding roll with all pairs of rolls (12, 13, 112, 113) from below. Roll winder according to one of claims 1 to 12, characterized in that the rocker (16, 116, 216) can be shifted to the extent that the finished winding roll (3, 103, 203) is ejected. Roll winder according to one of claims 1 to 10, characterized in that the support device (6, 106, 206) has segments that are side by side in a width of the web to be wound up dependent number are arranged.

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