EP0814042A2 - Winding machine for winding a running paper web - Google Patents

Abstract

The winding machine of the invention includes two parallel wound web roll support rollers which are spaced apart and on which the roll being wound is supported. The gap between the support rollers and below the supported wound roll is to be pressurized. A pressure chamber is defined by the support rollers, the wound roll above, and from below by a cross member which bridges over the distance between the support rollers and closes the bottom of the gap. End walls close the ends of the chamber. The cross member is movable between a sealing position where it is in contact with, or at least is sealed with, the two support rollers and bridges the gap between them to an open position where it opens the gap between the support rollers. The cross member is movable either down out of the gap, laterally out of the gap, or a combination of both, by reciprocating swinging, or oblique movement, and the like. The cross member has at least one passage which connects the pressure chamber with a source of compressed air through an intermediate conduit. An elongate transverse distributing pipe arranged at a distance from the cross member has a pressure connection through the conduit leading to the cross member.

Description

The invention relates to a winding machine for winding a running paper web.

Numerous types of such machines have become known. Reference is made to EP 0 496 863 B1. It is a double carrier roller winding machine with the possibility of relieving the weight of the resulting paper rolls from compressed air. For this purpose, a pressure chamber is formed, which is limited by the following elements: by the lateral surfaces of the two support rollers; through the outer surface of the paper roll itself; by in each case a displaceable end wall, which is in each case in an end region of the support rollers, and by a blow box, which extends parallel to the support rollers and lies more or less sealingly on the lateral surfaces of the support rollers. The blow box can be moved away from the support rollers, for example in order to remove paper residues after a paper jam, or to pivot a separating knife into the gap between the support rollers when changing rolls.

A machine according to this document can compensate for the dead weight of the paper roll (s) through the excess pressure in the pressure chamber. However, this is associated with serious disadvantages.

The blow box as such requires a relatively large amount of space, since it generally extends below the lower vertices of the two support rollers. If the blow box is moved away from the two support rollers, space is also required for this. Since the blow box mostly only downwards. can be moved away, and since a necessary lifting device in usually attacks on the underside of the blow box, a corresponding amount of space must be provided under the machine. But there is often a lack of space.

The invention has for its object to design a support roller winding machine for winding a running paper web with compensation for the dead weight of the resulting paper roll by relieving air pressure in such a way that less space is taken up under the support rollers than since then.

This object is solved by the features of claim 1.

The inventors have taken a path in solving the problem that is fundamentally different from EP 0 496 863 B1. Instead of the blow box provided there, they use a traverse to bridge the distance between the two support rollers and thus to limit a pressure chamber. Furthermore, they introduce compressed air into the pressure chamber via a line or (depending on the web width) via a plurality of lines distributed across the web width through the traverse.

Compared to the previous blow box, the crosshead saw a much smaller cross-section in a section plane perpendicular to the support roller axes. In the extreme case, the traverse consists only of a plate, each of which forms a seal with the respective support roller shells with its two longitudinal edges. There are therefore no space problems when moving the traverse down, not even when it is being moved downwards. It is particularly helpful that the lifting device can attack higher up than before. The traverse can also be moved out to one side, ie parallel to the support roller axes, or even perpendicular to these under one of the two Carrier rollers away in the horizontal direction. Swiveling away is also conceivable, the cross member being able to remain on the lateral surface of one of the support rollers, that is to say pivoting about an axis parallel to the support roller. However, an eccentric pivot axis can also be provided.

In particular in the case of winding machines for large web widths, an air pressure box can also be provided in the machine according to the invention. However, this is then arranged at a distance from the traverse, for example below one of the two support rollers. A plurality of lines establish a connection between this pressure box and the pressure space between the support rollers, the cross member, the paper roll and the laterally displaceable end walls. The compressed air box thus has the function of a transverse distribution pipe, with a corresponding number of compressed air flows, for example of the same pressures and throughputs, being fed to the pressure chamber under the paper roll.

One could say that the functions of the known blow box according to the document mentioned are divided into two components: one component is the cross member, which now only has the function of closing off the pressure space under the resulting paper roll, and the other component is that Cross distribution pipe with the lines, which together take on the function of optimally guiding and designing the compressed air flows.

The cross distribution pipe can be stationary, but this is not absolutely necessary. The lines mentioned are expediently hoses. The single line can be telescopic. It can also be composed of sections which are connected to one another in an articulated manner.

Is the cross distribution pipe at least approximately as long as the working width of the machine, and are the individual lines that make up the cross distribution pipe Connect to the pressure chamber, evenly arranged over the length of the cross distribution pipe, so that the pressure distribution over the working width is optimal.

Fig. 1-3

zeigen jeweils eine Wickelmaschine in einer Seitenansicht mit verschiedenen Ausführungsformen und Anordnungen von Traverse, Leitungen und Querverteilrohr.

Fig. 4.1

veranschaulicht eine weitere Ausführungsform.

Fig. 4.2

ist eine Längsschnittansicht durch den Gegenstand von Fig. 4.1.

Fig. 5-7

zeigen weitere Ausführungsformen, wiederum in Seitenansicht.

Fig. 8

zeigt eine Ausführungsform mit einem Druckluftkasten in Seitenansicht.

Fig. 9

zeigt eine weitere Ausführungsform in Seitenansicht mit einer besonders gestalteten Trennvorrichtung.

The invention is explained in more detail with reference to the drawing. The following is shown in detail:

Fig. 1-3

each show a winding machine in a side view with different embodiments and arrangements of traverse, lines and cross-distribution pipe.

Fig. 4.1

illustrates another embodiment.

Fig. 4.2

is a longitudinal sectional view through the object of Fig. 4.1.

Fig. 5-7

show further embodiments, again in side view.

Fig. 8

shows an embodiment with a compressed air box in side view.

Fig. 9

shows a further embodiment in side view with a specially designed separating device.

The support roller winding machine shown in Fig. 1 comprises two support rollers 1, 2. These are used to wind up a continuous paper web 3.1 to a paper roll 3.2.

The machine basement with the basement floor 4 is located below the two support rollers 1, 2.

The mutual distance between the lateral surfaces of the two support rollers 1, 2 is bridged in the example shown by a cross member 5. As can be seen, the traverse 5 has essentially the shape of an inverted L with the two legs 5.1 and 5.2.

One can also see a transverse distribution pipe 6 and a plurality of hoses 7, only one of which can be seen here.

Traverse 5 and transverse distribution pipe 6 extend essentially over the entire working width of the machine, at least over the minimum working width. They are at least approximately as long as the paper roll 3.2 or the entirety of the paper rolls if a slitter is present. The transverse distribution pipe 6 has a number of compressed air outlets 6.1 corresponding to the number of hoses 7, and the leg 5.1 of the cross member 5 is also provided with a corresponding number of passages, formed from compressed air connections 5.3. As can be seen, one end of each hose 7 is connected on the one hand to a connection 6.1 of the transverse distribution pipe 6 and on the other hand to a compressed air connection 5.3 of the leg 5.1.

A chair 8 is attached to the basement floor 4. This in turn carries the cross distribution pipe 6 and a slide 8.1. Carriage 8.1 guides a slide 5.4, which in turn engages the vertical leg 5.2 of the crossmember 5. With an up and down movement of the traverse 5, a perfect vertical guidance is guaranteed.

A spindle or a hydraulic or a pneumatic drive 9 serves as an actuator for an up and down movement of the cross member 5. As can be seen, the cross member 5 and hoses 7 are shown in two positions. In the upper position shown in solid lines, the horizontal part 5.1 of the cross member 5 shuts off the pressure chamber 10 below the paper roll 3.2. In the lower, dash-dotted position, this is not the case.

1 additionally has a web cutting device 11. This can be pivoted in the direction of the double arrow about the axis of the support roller 2. This separator is then put into action when the Paper roll 3.2 reaches its full diameter, and when the traverse 5 has moved downwards. In this case, the cutting edge 11.1 of the separating device 11 comes up through the space between the two support rollers 1, 2.

It is understood that the pressure chamber 10 must be airtight at least to a certain extent so that the compensation effect of the compressed air relief device can occur. For this purpose, seals 12, 13 are provided in the area of the longitudinal edges of the horizontal part 5.1. These can be sealing strips. However, labyrinth seals or the like can also be used, so that the seal is non-contact.

As can be seen, the paper web 3.1 is brought up to the support roller 1 from the bottom left and thus wraps around it from the bottom to the top. However, it would also be conceivable to insert it from the top right onto the second support roller and to pass it through the press nip between the support roller 2 and the paper roll 3.2. This web guidance avoids the risk that air from the pressure chamber 10 is wrapped between the paper layers of the paper roll 3.2. You would also have the advantage that neither of the two seals 12, 13 would have to be contact-free. Rather, contact seals could be provided between the longitudinal edges of the horizontal part 5.1 of the cross member 5 and the lateral surfaces of the two support rollers 1, 2. The separating device 11 would be replaced by a perforating device described below.

The embodiment according to FIG. 2 differs from that according to FIG. 1 primarily by the type of method of the cross member 5. While in FIG. 1 the cross member can be moved up and down vertically, it can be pivoted here in FIG. 2 - see FIG Dotted position shown in broken lines. The cross distribution pipe 6 is located on the basement floor 4. The pneumatic Actuator 9 is also arranged differently than in the embodiment according to FIG. 1. This results in advantages in the arrangement according to FIG. 2 with regard to clearing away paper waste, which could fall from top to bottom.

The embodiment according to FIG. 3 is similar to that according to FIG. 2. Here too, the focus is on being able to remove paper jams quickly and easily. As indicated, the cross-section can be a U open at the bottom, e.g. for reasons of stability.

The embodiment according to FIGS. 4.1 and 4.2 is a traverse 5, which is designed similar to that according to FIG. 1. Here again, a slide guide 5.4, 8.1 is provided in order to achieve a perfect vertical guidance of the cross member 5 by the pneumatic actuator 9. As can be seen from the two figures, the compressed air sockets 5.3 are assigned 5.5 cover caps. On the one hand, these have a protective function in that they ensure that no contaminants get into the tubes 7. On the other hand, they ensure a further equalization of the air flows, since each individual air flow is divided and deflected according to the arrows 5.6.

The embodiment according to FIG. 5 is similar to that according to FIG. 2 with regard to the arrangement and suspension of the crossmember 5 and with regard to the arrangements of the transverse distribution pipe 6 and the pneumatic actuator 9.

The traverse 5 has a box shape here. However, this only serves to stiffen the construction in that the cross member 5 receives a relatively large part of the ends of each line 7. Only the line parts located outside the cross member 5 are flexible.

Another variant is described below with reference to FIG. 9, essentially with the following features:

The crossbeam 5 carries a web separating device 11 which is movable relative to the crossbeam and can thus be moved vertically into the winding bed from below in a conventional manner in order to cut the web when the reel is changed.

In a further alternative to this, instead of a web separating device 11 according to the applications 195 19 306.7 and 295 08 732.3, a perforating device can be provided, preferably in combination with an automatic web end gluing device. This has e.g. 6 or 8 the advantage that you no longer have to take into account a conventional web cutting device when designing the weight relief device; i.e. the traverse must be able to be swung down less far because there is no longer a risk of collision with the web separating device; it also need not serve as a support for a web separating device.

The following is also conceivable:

The traverse also serves to support a web retractor; this must be activated when a roll change takes place in the unwind station (from which the paper web is supplied) and thus a new beginning of the web must be threaded into the winding machine. See e.g. Fig. 7.

The compressed air supply via flexible lines offers the possibility to easily vary the volume flow across the machine width, e.g. B. larger line cross sections can be provided in the edge zones to compensate for any leakage at the end seals.

If the crossbar is open at the bottom, the sealing strips can be screwed on from the inside of the crossbar. This makes the screw connections more accessible.

Compared to the conventional air box, there is much less risk of the air supply system becoming contaminated. In particular, the penetration of paper residue into the air supply system can be at least largely avoided, e.g. B. by providing the air outlet openings according to FIG. 4.1, 4.2 or 5 with a cover 5.5.

Compared to a conventional air box, the crossmember according to the invention can have a significantly lower weight (by using smaller sheet thicknesses), because the load due to the excess pressure is significantly lower.

4.1 and 4.2, the lower side plates 20 can be fixedly or movably attached to the crossmember 5; but they can also be supported in isolation from this. The upper side plates 21 (FIG. 1) are, as before, movably supported independently of the lower side plates. In a further variant, the lower side plates could be coupled to the upper side plates and axially guided together with these.

The transverse distribution pipe 6 naturally also has a connection to a compressed air source 22 (FIG. 1). It could be arranged on an end face of the transverse distribution pipe. Compressed air supply connections on both ends are also conceivable. Finally, it is conceivable to provide one or more compressed air supply connections on one long side.

In the embodiment according to FIG. 6, the paper web 3.1 is brought up to the winding machine from above, ie into the press nip between the support roller 1 and the resulting paper roll 3.2. In contrast to that Version in which the paper web 3.1 is inserted from below into the space between the support rollers 1 and 2, this embodiment has the great advantage that no air is pressed between the individual layers of the resulting paper roll 3.2.

In this embodiment, an essentially plate-shaped traverse 5 can be pivoted about a pivot axis 5.6. The pivot axis 5.6 runs parallel to the axes of the two support rollers 1, 2. A pneumatic drive 9 is used to pivot the cross member 5. Sealing strips 12, 13 are again provided here, which can touch the outer surfaces of the two support rollers 1, 2 .

The transverse distribution pipe 6 is connected to the pressure chamber 10 by means of a plurality of lines 7 through the cross member 5.

In the embodiment according to FIG. 7, the paper web 3.1 is inserted from below into the space between the two support rollers 1, 2.

The cross member 5 is here - as in the embodiment according to FIG. 6 - substantially plate-shaped and pivotable about a fixed axis 5.6.

The cross distribution pipe 6 can be stationary. The lines 7 are rigidly connected to the transverse distribution pipe 6.

Alternatively, as shown in FIG. 7, the cross distribution pipe 6, lines 7 and crossbar 5 can form a rigid unit which can be pivoted about a pivot axis 6.3 of the cross distribution pipe 6.

A belt guide 30 can also be seen. This serves to insert the web 3.1. It rests on the cross distribution pipe 6. It then goes into the working position when the cross member 5 is removed from its working position.

The winding machine also has a conventional cutting device 11 with a cutting edge 11.1, as already shown in FIG. 1.

FIG. 8 shows a further embodiment of a winding machine according to the invention. Here, the paper web 3.1 is inserted from above into the press nip between the support roller 1 and the resulting paper roll 3.2. A perforating device 40 is connected upstream of the winding machine, and also a plurality of adhesive dispensers 50 distributed over the web width. With regard to the details of such devices, reference is made to patent applications 195 19 306.7 and 295 08 732.9.

The winding machine works with a compressed air box 60. This can be moved into or out of the working position shown here by means of a pneumatic drive 9. The blow box can be pivoted about a pivot axis 62 by means of pivot levers 61.

A compressed air source 22 is provided. This is directly connected to the compressed air box 60 via one or more lines 7.

Alternatively, it is also possible to provide a cross valve tube 6 which is connected to the compressed air box 60 via a plurality of lines 70.

The winding machine according to FIG. 9 is constructed very similarly to that according to FIG. 1. The special feature lies in a web separating device 11 and its arrangement in relation to the crossmember 5. The web separating device 11 is in fact mounted on the crossmember 5, so that it has its lifting movement participates as a result of the action of the drive 9. The separating device comprises a narrow support beam 11.3 for a cutting edge 11.1 and its own drive 11.2. This can be operated pneumatically or hydraulically. Support beam and drive are mechanically connected to each other by means of a joint piece 11.4. Leg 5.1 of the traverse has an opening 11.5 through which the support beam 11.3 is guided and in which it can be moved up and down by means of the drive 11.2, namely between a non-operative and an operative position (the last one shown in dashed lines).

Claims (20)

Winding machine for winding a running paper web (3.1) 1.1 with two parallel supporting rollers (1, 2) which are at a mutual distance; 1.2 a pressure chamber (10) is enclosed by the following elements: the lateral surfaces of the support rollers (1, 2) the outer surface of the resulting paper roll (3.2) a cross member (5) bridging the distance between the support rollers (1, 2) one end wall (20, 21) in each end region of the support rollers (1, 2); 1.3 the crossmember (5) is movable in such a way that it forms openable sealing gaps with the lateral surfaces of the support rollers (1, 2); 1.4 the crossmember (5) has at least one passage which connects the pressure chamber (10) to a compressed air source (6, 22) via a line (7). Winding machine according to claim 1, characterized in that an elongated transverse distribution tube (6) is provided with a pressure connection and is arranged at a distance from the cross member (5). Winding machine according to claim 1 or 2, characterized in that the transverse distribution pipe (6) has outlets (6.1) distributed over its length. Winding machine according to one of claims 1 to 3, characterized in that the individual line is telescopic or composed of sections which are connected to one another in an articulated manner. Winding machine according to one of claims 1 to 4, characterized in that the individual line (7) is flexible. Winding machine according to one of claims 1 to 5, characterized in that the crossmember (5) can be completely or partially removed. Winding machine according to one of claims 1 to 6, characterized in that the crossmember (5) can be pivoted about an axis (5.6) parallel to the two support rollers (1, 2). Winding machine according to one of claims 1 to 7, characterized in that the crossmember (5) consists of a flat plate. Winding machine according to one of claims 1 to 7, characterized in that the crossmember (5) is a profiled beam which is open at the bottom, e.g. is an inverted U or L. Winding machine according to one of claims 1 to 9, characterized in that the crossmember (5) is designed as a hollow beam, in the interior of which the lines (7) are rigidly fastened, for example by welding. Winding machine according to one of Claims 1 to 10, characterized in that caps (5.5) are assigned to the passages (5.3) of the crossbeams, which shield the passages against the ingress of dirt, but allow the air streams to pass through. Winding machine according to one of claims 1 to 11, characterized in that the paper web (3.1) is guided from below to one of the support rollers (1, 2) and this is looped upwards over part of its circumference. Winding machine according to one of Claims 1 to 11, characterized in that the paper web (3.1) is introduced into the winding machine through the press nip between one of the two support rollers (1, 2) and the paper roll (3.2) which is being produced. Winding machine according to one of Claims 1 to 12, characterized in that a web separating device (11) is provided which can be moved into the winding bed from below in a manner known per se in order to sever the web (3.1) when changing the reel. Winding machine according to claim 14, characterized by the following features: 15.1 the separating device (11) is mounted on the crossmember (5); 15.2 a supporting beam (11.3) for the cutting edge (11.1) of the separating device (11) can be passed through an opening (11.5) in the crossmember (5); 15.3 the supporting beam (11.3) can be moved between an operative and a non-operative position. Winding machine for winding a running paper web (3.1) 16.1 with two support rollers (1, 2) which are arranged parallel to one another and have a mutual spacing; 16.2 a pressure chamber (10) is formed from the following elements: the lateral surfaces of the support rollers (1, 2) the outer surface of the paper roll (3.2) a blow box (60) bridging the distance between the support rollers (1, 2) An end wall located in each end region of the support rollers (1, 2) 16.3 the blow box (60) is sealed against the lateral surfaces of the support rollers (1, 2); 16.4 of the blow box (60) is either completely or partially removable; 16.5 the paper web (3.1) is inserted into the winding machine through the press nip between one (1) of the support rollers and the resulting paper roll (3.2). Winding machine according to one of claims 1-16, characterized in that a perforating device (40) before the paper web (3.1) enters the gap between the one (1) of the two support rollers (1, 2) and the resulting paper roll (3.2). is provided. Winding machine according to claim 17, characterized in that at least one adhesive dispenser (50) is provided before the paper web (3.1) enters the gap between the one (1) of the two support rollers (1, 2) and the resulting paper roll (3.2). Winding machine according to one of Claims 16 to 18, characterized in that the blow box (60) is connected directly to a compressed air source (22) via at least one line (7). Winding machine according to one of Claims 16 to 18, characterized in that a transverse distribution pipe (6) and a plurality of lines (70) are connected between the compressed air source (22) and the blow box (60).

Images