EP0987204B1 - Roll winding device - Google Patents

Description

The invention relates to a roll winding device a winding bed, which has two support rollers, the Form side walls of a pressure chamber, which is also from a Bottom wall is limited, being between the bottom wall and at least one support roller a movable sealing body is arranged.

EP 0 769 465 A2 describes such a roll winding device. This support roller winding machine has one Winding bed, which is formed from two support rollers, form the side walls of a printing room, which also of a bottom wall is limited by a blow box is formed. Between the blow box and the two Carrier rollers are each a movable sealing body arranged. The inlet side sealing body is essentially tangential to the inlet side Carrier roller in the direction of the other carrier roller slidable to a gap between the support roller and to create the sealing body through which a material web can be introduced. The other seal body is around a pivot point on the blow box pivotable and can thus be from the outlet side Carrier roller are pivoted away, for example, a Let the separator retract.

Another roll winding device is, for example known from DE 195 24 905 A1.

In one of the last manufacturing steps, paper webs usually cut to the correct width and then rolled up in rolls before packed and shipped. The winding cores, on in contrast, which are wound up the paper rolls to those used during paper production Drums only a relatively low stiffness and Load capacity. They are often designed as cardboard tubes. This causes the paper rolls to curl are usually supported by support rollers. This is particularly pronounced when the winding device is designed as a roller winder. Here the roll rests on carrier rollers without additional Attack holding forces on the core. But also with a back-up roller roller with additional holding means attack the roll core, there is a support on a roller. If the paper rolls are bigger and heavier the support line forces of the paper roll on the roller or rollers relatively large, which is the disadvantage has that the winding hardness is increased. This can cause the roll to burst later. To relieve the rollers and reduce the line force can a pneumatic overpressure below the Role are generated so that the role is at least partially resting on an air cushion.

The air cushion is generated in the pressure chamber. The pressure chamber is from the two support rollers on the left and right, from the winding roll above and from the bottom wall limited below. There are further sealing measures for the end faces provided, but for the present invention are of minor importance. The bottom wall in operation should be as close as possible to the carrier rollers come close. If the web of material to be wound up but it runs into the changing bed from below, it is not favorable if the bottom wall touches the material web. On the other carrier roller, which is accordingly is not wrapped in the material web, however, can a sliding touch will be allowed if the surface of the bottom wall is designed accordingly is. In most cases you will be with both Allow carrier rollers a small gap.

The requirement that the bottom wall support rollers as possible should be arranged closely adjacent, difficult however, the handling of the roll winding device then when a new web of material in the changing bed to be introduced. But this is from time to time necessary, for example after a web break. The Thread the material web into the narrow gap between the corresponding support roller and the bottom wall relatively much time. With a web break can also result in a paper jam in the print room, which only can be removed with difficulty. In the worst case it even causes damage to the seals or the support roller.

It is therefore in the above-mentioned DE 195 24 905 A1 been proposed the bottom wall, which here as Sealing box is designed to be arranged on a carrier, that can be relocated. In other words the bottom wall completely from its working position into one Rest position pivoted.

However, this procedure requires a considerable amount constructive effort. The bottom wall usually needs cover the entire axial length of the winding device. This is usually based on the working width adjusted upstream paper machine and can accordingly up to 10 m. This configuration it makes it difficult to have a constant sealing gap between the support rollers and the bottom wall. The pivoting in and out of the bottom wall is also relative expensive because large masses have to be moved.

The invention has for its object the handling to simplify in the area of the seal.

This task is done with a roll winding device of the type mentioned in that the Seal body in the direction of a sealing position with a hiring force.

This has several advantages. The bottom wall, which is also in Form of a "blow box", ie as a body with a certain Extension in space, can be formed rigid, so immovable relative to the support rollers his. This avoids that larger masses have to be moved. The bottom wall can be made with a relative high accuracy compared to the support rollers become. This position can be maintained during operation without a complicated structure is. On the other hand, the shape of the bottom wall or the Blow box also remain unchanged. It can for example a normal rectangular profile with the act shape-related stability. Changes in the Geometry is only created by the sealing body or bodies causes. The sealing body is a separate component, that in the space between the carrier roller and the box having the bottom wall inserted can be. The sealing body is a relatively light component compared to the bottom wall. Because the sealing body extends over its axial Length, i.e. parallel to the axis of rotation of the support roller, can support the box of the bottom wall, he must themselves do not have too great inherent stability. It there is an additional gap, if necessary must be sealed, namely between the bottom wall and the sealing body. The air loss that can occur through this gap, but is caused by the advantages of the movable seal on a rigid fixed floor wall. The sealing body is not rigid or immovable on the bottom wall fixed, but it is set in by a hiring force held the desired position. Now if a force acts in the opposite direction, for example by tapering Paper in the event of a malfunction, then the sealing body automatically pushed away and leaves the lump of paper by. The risk of damage then becomes kept small.

The sealing body is advantageously in a Movable away from the changing bed. This configuration has an advantage especially related to an outline of the material web, which in practice now and then occurs again. Especially when the material web tears in the area between the two support rollers, the material web is conveyed into the changing bed, without being taken up by the winding roll becomes. In this case there is a lump of paper that damage to the support rollers and / or the bottom wall can lead. If now the sealing body is movable away from the changing bed, then it moves in just the right direction to get the paper web out of the Let the area between the support rollers escape.

Advantageously, the contact force is the sum from the weight of the sealing body and one force resulting from a compressed air load essentially in balance. The hiring force should at most be a little bigger. When presenting the equilibrium situation even small forces are sufficient to to move the seal body away from the support roller. These small forces arise at the very beginning Fault situation, so that a larger formation of errors Fault situation, so that a larger formation of errors can be avoided. Also threading a web is easier if the web is between the bottom the idler rollers is introduced because of smaller forces are needed to get the seal body off the idler remove to provide the necessary handling space to deliver.

The sealing body is preferably with a spring force loaded. The spring presses the seal body in its sealing position. This is a very simple one and practically maintenance-free design.

In an alternative embodiment, the sealing body is with a path-independent force from one Actuator loaded. The servomotor can for example pneumatic, hydraulic, electric or magnetic work. With this configuration, the Force that is necessary to remove the sealing body from the To remove the idler roller, not with the increase in distance. Accordingly, the sealing body can Clear full opening if a malfunction occurs without building up major opposing forces.

In a preferred embodiment it is provided that the sealing body interacts with a movement stop. This movement stop can, for example be arranged on the bottom wall. With this configuration can be achieved that the seals on the Seal the sealing body without contact to the support rollers. The movement of the sealing body is in each case limited by a stop.

In an alternative embodiment can be provided be that the sealing body with a slide bar of the support roller. In this case there is a touching Poetry. The stroke or movement of the seal body is then only limited by the support roller.

The sealing body preferably acts with a position sensor together, when the Sealing body away from the support roller an error signal emits. With the help of this sensor, for example be designed as a movement or proximity switch may be stopping the winder or even controlled knocking off of the material web possible. So far, one problem has been that no one knows exactly when there is a paper jam between the support rollers (which are usually used Web tension measuring systems can detect a paper tear an interruption formed by the support roller and paper roll do not recognize, so the paper continues is promoted. If this error occurs and due to the accumulation of paper (or some other Material web) of the sealing body to the right or left of the bottom wall is moved, then the winding device can be stopped for safety reasons. This also has the advantage that the further Avoid agglomeration of paper in the changing bed can be.

In a preferred embodiment it is provided that the sealing body is movable along a plane that opposite a vertical central plane through the winding bed is inclined. In this case, the sealing body still moving under the floor wall when moving be so that the released opening or gap gets even bigger. This increases the risk of it becoming a Paper or material jam comes even smaller.

This is advantageous if the bottom wall is facing is inclined towards the sealing body. If the lower one Boundary wall of the pressure chamber has a slope and there is a build-up of paper in the print room, becomes the "lump" under the action of gravity on the sloping base plate towards the sealing body slide down. This movement is usually done earlier than a movement by the Pressure of a accumulating web of paper becomes. In the event of an error, the paper web will close move out of the pressure chamber at an earlier point in time can.

It is also an advantage if between the bottom wall and arranged a stationary seal a support roller is, the direction of rotation of this support roller of the Bottom wall runs to the changing bed. The danger that a web of material between the stationary seal or sealing arrangement and the support roller, is relatively small. As soon as one entered the pressure chamber Material web with the corresponding support roller comes into contact because of friction between the material web and the support roller again from promoted the seal away. The other is more critical Carrier roller that rotates so that its surface towards the movable seal body. When a Web of material or a lump of material through this Carrier roller is driven, but it has the possibility push the seal body away so that a Accumulation of material in the pressure box can be avoided can.

Fig. 1

eine schematische Stirnseitenansicht einer Rollenwickeleinrichtung,

Fig. 2

verschiedene Arten der Zufuhr einer Materialbahn zur Wickeleinrichtung,

Fig. 3

eine vergrößerte Darstellung eines Teils von Fig. 1,

Fig. 4

eine alternative Ausgestaltung zu Fig. 3,

Fig. 5

eine alternative Ausgestaltung zu Fig. 1,

Fig. 6

eine weitere alternative Ausgestaltung zu Fig. 1 und

Fig. 7

eine Darstellung nach Fig. 6 mit wegbewegtem Dichtungskörper.

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

Fig. 1

1 shows a schematic end view of a roll winding device,

Fig. 2

different types of feeding a material web to the winding device,

Fig. 3

2 shows an enlarged illustration of a part of FIG. 1,

Fig. 4

an alternative embodiment to Fig. 3,

Fig. 5

an alternative embodiment to Fig. 1,

Fig. 6

a further alternative embodiment to Fig. 1 and

Fig. 7

6 with the sealing body moved away.

A roll winding device 1 has two driven Carrier rollers 2, 3, between which a winding bed 4th is formed. There is a winding roll 5 in the winding bed 4. This is used to wind up a material web 6 Feed of the material web 6 is not shown in more detail in FIG. 1 shown. Possible web runs result from the individual representations of FIG. 2nd

Fig. 2a shows that the material web 6 from the bottom right is supplied, the left support roller 2 wraps around about 180 ° and then runs into the changing bed 4.

2b shows a winding technique in which the material web is fed from the bottom right and the right carrier roller 3 wraps around an angle of about 90 °, before contacting the winding roll 5 comes.

In Fig. 2c, finally, the material web 6 in the Space between the two support rollers 2, 3 introduced from below, wraps around the right roller 3 over a Angle of about 150 ° and is then on the winding roll 5 wound up.

Of course, the web runs can also be mirror-symmetrical align to a plane that is perpendicular between the two support rollers 2, 3.

As the roll diameter increases, the roll weight increases the winding roller 5.-This increases the contact pressure in the nips between the winding roll 5 and the Carrier rollers 2, 3. This pressure is one of the Factors influencing the winding hardness of the winding roll 5. Especially when winding up a paper web (The same applies to comparable railways, in particular Plastic or metal foils) you want one Achieve winding hardness curve at which the winding hardness decreases from the inside out.

To reduce the contact forces, one creates in the winding bed 4 a compressed air cushion that the winding roll 5 supports and accordingly the contact forces on the Carrier rollers 2, 3 reduced.

To create this compressed air cushion in the changing bed can, a pressure chamber 7 is provided to the left of one support roller 2, to the right of the other support roller 3 and above is limited by the winding roller 5. frontal Limitations are not shown here, however available.

On the side of the pressure chamber facing away from the changing bed 7, a bottom wall 8 is provided, which acts as an air box 9 is formed. The air box 9 also has one Feed channel 10 through which compressed air into the Pressure chamber 7 can be fed.

As best seen in Fig. 3, there is between the air box 9 and the support rollers 2, 3 a distance or a gap 11. To close this gap 11, are sealing body 12, 13 provided in 3 perpendicular to the top the bottom wall 8 are movable. Here is the sealing body 12 in its most extended Position shown, while the sealing body 13 in the most retracted position is.

Each sealing body 12, 13 faces the respective one Carrier roller 2, 3 side facing a sealing strip 14 on that with the respective peripheral surface of the support roller 2, 3 cooperates. To the most extended Limit the position of the sealing bodies 12, 13, can be provided a stop 15 which is set is that between the sealing strip 14 and the support roller 2, 3 forms a small gap. The Sealing is done without contact. Of course he can Stop 15 also arranged at another location his.

The sealing body 12, 13 are of linear working Servomotors 16 in the direction of the support rollers 2, 3rd pushed or moved until they abut the stop 15. The force that the respective servomotor 16 exerts is only so large that it is sufficient, its own weight of the respective sealing body 12 and others in the direction the force of gravity acting on the sealing body 12 Balance forces, such as forces, which are applied by the pressure in the pressure chamber 7. If now - for whatever reason - an outline of the Material web 6 takes place in the changing bed 4, then the Material web 6 was further promoted, but not anymore wound on the winding roll 5. Then it arises a lump of paper in the changing bed, which can also be found in the Pushes pressure chamber 7. This lump then pushes open one of the two sealing bodies 12, 13. The result force increase is sufficient to the sealing body in the position shown for the sealing body 13 to postpone. This creates the gap 11 through which the material web 6 from the pressure chamber 7 can escape. This eliminates the risk of a web break leads to greater damage, kept small.

The servomotors 16 work with a path length independent Force. So if the sealing body 12, 13th pressed down is with increasing impressions no major force required. This has the advantage that as soon as a fault occurs and a web of material 6 presses on the sealing body 13, the largest possible gap 11 arises. However, then an auxiliary power is available for the servomotors 16 be put, for example compressed air, a hydraulic Pressure or an electric current.

To recognize an error as quickly as possible, is for each sealing body 12 a sensor 17 is provided, the a change in position of the sealing body 12, 13 determined. The sensor 17 can then emit a signal that stops the winding device 1 and the material web hitting off. A web break in the changing bed 4 can namely by determining the tensile stress the winding device are practically not recognized. Since one of the two occurs when a fault occurs Sealing body 12, 13 with a high probability is pushed down, then you can make a mistake recognize with the same high probability.

Fig. 3 shows a connection between the sealing bodies 12, 13 and the air box 9 only at the lower end of the servomotors 16. These are there on projections 18th supported. In a manner not shown, however for the sealing body 12, 13 a linear guide on the Outside wall of the air box 9 is provided.

Fig. 4 shows a modified embodiment in which same parts are provided with the same reference numerals. In this embodiment, the servomotors 16 are replaced been by springs 19. The springs 19 are here dimensioned so that the one shown in Fig. 4 on the left End position of the sealing body 12 an equilibrium state exists, i.e. the spring 19 acts on the dead weight of the sealing body 12 and the compressive forces against the air pressure so that the forces on the Seal body 12 are almost balanced. In which 4 are the sealing body 12, 13 also not against stops 15. The Sealing strips 14 are rather on the support rollers 2, 3 on. Since, as I said, almost a balance of power there is, the contact pressure of the sealing strips 14th on the support rollers 2, 3 very low.

If an error occurs in this configuration, then the incoming paper web hits a sealing body, for example the sealing body 13, and pushes it down against the force of the spring 19, so that the gap 11 is released and the paper web can be pushed out again. The function is thus similar to the configuration according to FIG. 3.

5 shows another embodiment. In the embodiments 1, 3 and 4, the sealing body 12 linearly shifted and that along the outer wall of the air box 9. In the embodiment according to Fig. 5, the sealing bodies 12, 13 are attached to levers 20, which can be pivoted about the axis of rotation 21 of the support rollers 2, 3 are. The levers 20 are in the direction of the double arrow 22 from a working position shown on the left in FIG. 5, in which the gap 11 between the air box 9 and the support roller 2 is closed, and in Fig. 5 position shown on the right, in which the gap 11 is open, pivotable. The sealing body 12, 13 are rigid at the free ends of the levers 20 attached so that they are aligned with the support rollers 2, 3 do not change when wasted. Accordingly they "fit" exactly in the gap 11 when they are in 5 position shown on the left are pivoted. This configuration is particularly suitable for web runs, as shown in Figs. 2a and 2b.

The trajectories shown in FIGS. 1 and 5 the sealing body 12, 13 each provide certain Limit cases. Of course you can use the sealing body 12, 13 also move on other tracks that between these two borders. 1 and 5 movements shown have the advantage that existing elements in the winding device 1 can use to support the sealing body 12, 13.

6 and 7 show a further embodiment of a Reel winding device. This differs from the ones shown above, that the two support rollers 2, 3 different diameters exhibit. But it is also possible that their Rotation axes arranged at different heights are.

Another difference is that only one movable sealing body 12 is provided, which with the support roller 2 cooperates. Here is a specialty to note that the material web 6, the over an spreader roller 23 is guided, initially on this Carrier roller 2 comes in the direction of an arrow 24 turns. The other support roller 3 has the same Direction of rotation. Relative to the pressure chamber 7, however the movement of their surface exactly opposite to that of the support roller 2, which is indicated by an arrow 25 is shown.

At the air box 9 is a stationary seal arrangement 26 attached, which cooperates with the support roller 3.

The bottom wall 8 is in the direction of the movable Sealing body 12 inclined. The bottom wall 8 thus closes an angle to a plane 27 which the vertical median plane of the changing bed, one that is less than 90 °.

The direction of movement of the movable seal body 12 no longer runs parallel to this plane 27, but is at an angle in the range between 15 ° and 45 ° to this plane 27 inclined. As can be seen from FIG. 7 is created when the sealing body moves back 12 a relatively large gap 11 between the support roller 2 and the sealing strip 14, so that the running out one led into pressure chamber 7 in the event of a fault Material web 6 becomes easier.

The risk that the material web 6 in the sealing area between the support roller 3 and the sealing arrangement 26 arrives, is relatively small because the material web, once they are in with the surface of the support roller 3 in Touch comes, transported in the direction of arrow 25 or pushed back.

However, if the material web on the Bottom wall 8 comes, then it slips under the effect gravity down on the moving seal body to and is from the support roller 2 in the direction the arrow 24 taken away. A jamming between the Seal 14 and the support roller 2 can not take place because the sealing body 12 through the material web is pushed back.

Claims (11)

1. Reel winding device comprising a winding bed (4) which has two carrier rolls (2, 3) which form side walls of a pressure chamber, which is also bounded by a bottom wall (8), a movable sealing element (12, 13) being arranged between the bottom wall (8) and at least one carrier roll (2, 3), characterized in that the sealing element (12, 13) is loaded with a setting force in the direction of a sealing position.
2. Device according to Claim 1, characterized in that the sealing element (12, 13) can be moved in a direction away from the winding bed (4).
3. Device according to Claim 1 or 2, characterized in that the setting force is substantially in equilibrium with the sum of the dead weight of the sealing element (12, 13) and a force resulting from a compressed air loading.
4. Device according to one of Claims 1 to 3, characterized in that the sealing element (12, 13) is loaded with a spring force (19).
5. Device according to one of Claims 1 to 3, characterized in that the sealing element (12, 13) is loaded with a path-length-independent force from an actuating motor (16).
6. Device according to one of Claims 1 to 5, characterized in that the sealing element (12, 13) interacts with a movement stop (15).
7. Device according to one of Claims 1 to 5, characterized in that the sealing element (12, 13) bears on the carrier roll (2, 3) with a sliding strip (14).
8. Device according to one of Claims 1 to 7, characterized in that the sealing element (12, 13) interacts with a position sensor (17), which outputs an error signal if the sealing element (12, 13) is displaced away from the carrier roll (2, 3).
9. Device according to one of Claims 1 to 8, characterized in that the sealing element (12) can be moved along a plane which is inclined with respect to a vertical mid-plane (27) through the winding bed (4).
10. Device according to Claim 9, characterized in that the bottom wall (8) is inclined in the direction of the sealing element (12).
11. Device according to Claim 9 or 10, characterized in that a stationary seal (26) is arranged between the bottom wall (8) and a carrier roll (3), the direction of rotation (25) of this carrier roll (3) running from the bottom wall (8) towards the winding bed (4).

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