EP0514334B1 - Compression apparatus in wrapping machines for making tubular packages from printed products - Google Patents

Abstract

The compression apparatus for winding machines for winding printed products fed in an imbricated formation contains at least two compression belts (5.1, 5.2), which together enclose a sector of the circumference of the roll of at least 270 DEG . An even and powerful pressure, which in one particular embodiment is controllable, is thereby exerted on the roll. The belts (5.1, 5.2) can be fully ventilated by means of movement groups (3, 6, 8, 17.1, 17.2, 21.1, 21.2), following which a complete roll can be simply discharged. <IMAGE>

Description

The invention is in the field of printing machines. It relates to a pressing device for winding machines according to the preamble of claim 1. The generic pressing device has become known from US-A-3 112 087.

Various winding machines are known which wind printed products into a roll and hold them together in this wound-up arrangement by means of a holding element. Tapes, cords, foils and so on are used as holding elements. In order to wind up the printed products in a roll or tube shape and to attach the holding element at the same time or in a subsequent work step, guide or pressing devices are required which initiate and support the winding process. From EP-A-0 313 781 a device is known which makes it possible to use holding elements with a low rigidity. A plastic film becomes from a supply roll unwound and brought under tension against a supplied shingled stream of printed products. The film and a section of printed products are fed to a take-up point via a separate or common feed and are wound there together around a winding mandrel and, after the take-up has ended, the sheet is separated off at the desired point. The winding takes place on the one hand by the freely rotatable winding mandrel, on the other hand by an endless belt which drives the mandrel with the printed products and at the same time exerts a certain pressure on the printed products in the radial direction.

At the beginning of the winding process, when the endless belt lies against a substantial part of the periphery of the winding mandrel or the wound printed products, a relatively good contact pressure is achieved. However, the more printed products that are wound, the smaller the sector covered by the belt. Shortly before the end of the winding process, the periphery of the winding is hardly covered by the belt over a sector of 180 °. The winding process can thereby be adversely affected, in particular during the final phase of the winding. The desired strength of the winding suffers and a controlled pressing of the printed products and the holding element holding them together is no longer guaranteed. A further disadvantage of these and other known devices lies in the time-consuming and mechanically complex ejection process of a finished printed product roll.

The above-mentioned disadvantages and problems become even more serious if the compact winds which are emerging in recent times, as are known, for example, from EP-A-474 999, which is known from the prior art under Article 54 (3), are to be wound, ie winds out a densely compressed stream of scale is formed. The forces occurring there, acting radially against the outside, but also that Initiation of the winding process, ie the deflection of the shingled stream during winding, can only be solved inadequately with conventional devices.

The same applies to the pressing device, which is described in US-A-3112087 and which can be used for the winding of sheet metal pieces. With the pressing device described, which has two pressing belts, the resulting winding is pressed around a large sector of the winding periphery during the entire winding process, but very large masses have to be displaced in order to eject the winding, in such a way that rapid ejection is hardly possible.

It is therefore an object of the invention to provide a pressing device which ensures a pressing and holding effect covering a large part of the winding periphery during the entire winding process and which enables the production of precisely wound, compact tubular packages of high rigidity and a simple and quick removal of the finished printed product rolls enables.

This object is achieved by the features mentioned in the characterizing part of patent claim 1.

Figur 1

zeigt eine erste, beispielhafte Ausführungsform der erfindungsgemässen Anpresseinrichtung zu Beginn des Wickelvorgangs bei noch leerem Wickeldorn;

Figur 2

zeigt die Anpresseinrichtung gemäss Figur 1 kurz vor Abschluss des Wickelvorgangs mit einem fast vollen Druckproduktewickel;

Figur 3

zeigt die Anpresseinrichtung gemäss Figur 1 nach Abschluss des Wickelvorgangs vor dem Ausstossen des vollen Wickels.

Figuren 4 bis 6

zeigen eine zweite, beispielhafte Ausführungsform der erfindungsgemässen Anpresseinrichtung in den den Figuren 1 bis 3 entsprechenden Stadien des Wickelvorganges.

Figur 7

zeigt ein Ablaufschema des Wickelvorganges und des Wickelwechsels für die Anpresseinrichtung gemäss Figuren 4 bis 6.

Two exemplary embodiments of the invention will be explained in more detail with reference to the following figures.

Figure 1

shows a first exemplary embodiment of the pressing device according to the invention at the beginning of the winding process with the winding mandrel still empty;

Figure 2

shows the pressing device according to Figure 1 shortly before completion of the winding process with an almost full printed product roll;

Figure 3

shows the pressing device according to Figure 1 after completion of the winding process before ejecting the full roll.

Figures 4 to 6

show a second, exemplary embodiment of the pressing device according to the invention in the stages of the winding process corresponding to Figures 1 to 3.

Figure 7

shows a flow diagram of the winding process and the winding change for the pressing device according to FIGS. 4 to 6.

The present invention is particularly concerned with the manner of pressing, holding and guiding the printed products during the winding process. The design forms of the pressing device described with reference to the figures can be used together with different types of winding machines, but are particularly suitable for use together with a winding machine according to EP-A-0 313 781.

In Figure 1 , a first embodiment of the pressing and holding device is shown at the beginning of the winding process. The structure and the mode of operation of the printed product and holding element feed, the drive, etc. corresponds to the above-mentioned device as it is shown and described in detail in EP-A-0 313 781 by the same applicant. Therefore, in the following, the overall device is only made to the extent that this is necessary for understanding the device according to the invention.

The essence of the invention is characterized by a fundamental re-function of the conventional auxiliary elements supporting the winding process. In those devices, these elements were primarily understood as auxiliary devices for supporting the winding . That means these auxiliary facilities initiated the redirection and rewinding of the linear print product flow and at the same time fulfilled a function as a contact pressure . The present invention is based on the fact that for the production of compact printed product rolls with high strength, a device is used which exerts an effective, that is to say a large part of the winding periphery , pressing and holding function and at the same time, quasi as a secondary function, supports the initiation of winding . In other words, an effective pressing device is created, whereas conventional constructions were based on a mere auxiliary device for the winding process.

A winding mandrel 1, which is used to wind up the printed products, is suspended and supported in a conventional manner in a frame 2, which is not shown here, in a freely rotatable manner. A belt conveyor 3 is also pivotally attached to the frame 2 about an axis 4. Three possible pivot positions 3 ', 3''and3''' of the belt conveyor 3 are shown, the position 3 'being drawn out when the reel is still empty, the other two positions 3''and3''' are shown in dash-dot lines. The idea of the invention is based on the idea of holding or pressing the winding as far as possible along its entire periphery, ie over an optimal sector of 360 °, and thereby exerting a contact pressure which is as uniform as possible in the radial direction against the winding mandrel 1. For this purpose, at least two pressure belts 5.1 and 5.2 are provided according to the invention, which wrap around the winding periphery over a sector of at least 270 ° with a view to the optimal wrapping sector. Both belts 5.1, 5.2 are endless belts or belts, which are arranged in the region of the winding mandrel and are driven over a plurality of deflection rollers, so that they each over the winding mandrel 1 or during the winding process the printed product winding 7 (indicated by a dash-dotted line) Part of their periphery. The first pressure belt 5.1 wraps around the empty one at the start of the winding process Winding mandrel 1 along its periphery over a sector α, which in the present exemplary embodiment is approximately 140 °. The second belt 5.2, in turn, ensures a pressure on a second sector β of approximately 160 ° to 180 °. Since these sectors α, β partially overlap in the present exemplary embodiment, an open sector of 50 ° to 60 ° remains, the periphery of which is not detected by the pressing device. If an even more complete wrap (against 360 °) is to be achieved, a third pressure belt can be used. The printed products are fed in via the open sector, ie in this exemplary embodiment via the belt conveyor 3 (here from right to left).

This circulation of the winding mandrel is achieved in that the two belts 5.1, 5.2 are arranged such that at the beginning of the winding process, a section of the first belt 5.1 by means of a swivel arm 6 (in its swivel position 6 'when the winding is empty, which is shown in solid lines), the free one End approximately forms the point of contact to the periphery of the mandrel 1, is guided to the mandrel and the periphery of which rests over a sector of at least 130 °, preferably 140 °, and the second belt 5.2 is guided in a U-shaped loop around the mandrel 1 and the periphery of which lies over a sector of at least 160 °, preferably 170 °, the two sectors overlapping by a maximum of 15 °, preferably only 10 °.

Since the geometry of the winding changes permanently during the winding process, it is important that, particularly at the end of the winding process, the above-mentioned contact pressure is as good as possible, ie has the smallest possible open sector, and takes place evenly. An advantage of the device according to the invention is that even windings with irregularities are optimally held and pressed along their periphery become. This is especially the case with the compact windings mentioned, since they have an approximately circular cross section.

The course of the first pressure belt 5.1 will now be described in more detail, this being followed in the winding direction (ie counterclockwise in the figure) and starting from the winding mandrel. Immediately at the winding mandrel, the belt 5.1 is guided around a small deflection roller 10.1 (or a static deflection with a small radius of curvature), which in turn is attached to a free end of the swivel arm 6. The swivel arm 6 is in three possible swivel positions 6 ', 6''and6''', the position 6 'being drawn out when the reel is empty, the other two positions being shown in dash-dot lines. This swivel arm, which is rotatable about an axis 11, has a length which corresponds approximately to the diameter of the largest roll of printed products to be wound. It is arranged in such a way that its inner end position 6 'extends tangentially to the winding mandrel 1 and its free end approximately forms the point of contact with the periphery of the winding mandrel. During the winding process, the free end moves radially outwards at the same time as the winding radius increases. In an intermediate position 6 ″, when the reel is full, the swivel arm or the pressure belt guided around the deflecting roller 10.1 at the free end again lies tangentially to the full reel. The pressure belt is guided on this swivel arm by a second small roller 10.2. The radius of the small roller 10.1, preferably also that of the deflecting roller 10.2 on the swivel arm 6, is preferably less than 0.5 cm. This enables small dimensions of the swivel arm 6 and thus, despite the limited space, a tight fit of the free end of the swivel arm 6 and thus of the band on the winding 7. Another deflection roller 12, the axis of which coincides with the swivel arm axis 11, has a larger diameter than the rollers 10.1, 10.2, and further deflection rollers 13 and 14 serve to deflect and guide the belt 5.1 up to the drive roller 15. The drive of this roller takes place in a conventional manner via a here Not shown drive (electric motor). The belt is guided via four further deflection rollers 16.1-16.4 to a specifically arranged deflection roller 17.1. This deflecting roller 17.1 is located in an area 20.1, which lies with respect to the winding mandrel 1 relative to the swivel arm 6 or the small deflecting roller 10.1. Thanks to the arrangement of this deflecting roller 17.1 and the small deflecting roller 10.1, the pressure belt 5.1 rests on the swivel arm 6 via the mentioned sector a the winding mandrel 1. The endless belt 5.1 is held under tension. The belt length or guide is chosen so that the change in length required by the increase in the winding diameter is compensated for by a compensating movement of the deflection roller 16.1, the two belts 5.1, 5.2 in the direction of the two arrows A₁, A₂. This compensatory movement can be done by spring force or a drive in the direction of arrows A₁, A₂. Depending on requirements, this compensating movement of the deflection roller 16.1 can be controlled during the winding process, and consequently the contact pressure of the belts 5.1, 5.2 can be influenced as a function of time or according to other predeterminable parameters, which can be used for additional stabilization of the winding. The mutual arrangement of the drive roller 15 and the compensating deflection roller 16.1 provided here is particularly advantageous. The deflection roller 16.1 is connected downstream of the drive roller 15 in the drive or winding direction (ie it lies in the lost drum). If, due to the size change of the winding during the winding process, an extension of the belt is required, this extension can be effected by a compensating movement in the direction of arrow A 1 without the belt having to be pulled off the drive roller, ie there is no grinding or slipping of the Belt on the drive roller.

The course of the second pressure belt 5.2 is also described in the winding direction (counterclockwise). Starting from the winding mandrel 1, the belt 5.2 is first guided around a first deflection roller 21.1 and then via a second deflection roller 22 to the drive roller 15, which drives the first belt 5.1 at the same time. The pulleys 16.1-16.3 are also used to guide both belts 5.1 and 5.2. It is easy to see that for this reason both the drive roller and the shared deflection rollers must have a sufficient width so that both belts can be guided next to each other . In other words, the belts are offset in the direction perpendicular to the plane of the drawing. This is also necessary because the contact pressure on the winding 7 can partially overlap. The second winding belt 5.2 is then guided over two further deflection rollers 23.1, 23.2 below or around the belt conveyor 3, so that the belt conveyor does not disturb the belt course even in its outer end position 3 '''. Finally, the belt 5.2 is guided back to the winding mandrel 1 via a deflection roller 24, the axis of which coincides with the axis 4 of the belt conveyor 3, and via three smaller deflection rollers 25.1-25.3 in the belt conveyor. The first deflection roller 21.1 for the second pressure belt 5.2 is arranged in such a way that the belt 5.2 coming from the belt conveyor or its small deflection rollers 25.1-25.3 forms a U-shaped loop around the winding mandrel 1 and thus bears over the mentioned sector β of almost 180 ° and unfolds its contact pressure.

In order to maintain the loop during the winding process when the winding mandrel is empty or to even improve the pressing area (sectors α and β), the arrangement of the pivotable belt conveyor 3 and the pivot arm 6 must be coordinated with one another and with respect to the winding mandrel 1. A favorable arrangement can easily be seen from the figure: The angle enclosed by the swivel arm 6 and the belt conveyor 3 when it is in contact with the empty winding core (swivel positions 3 'or 6') is between 30 ° and 45 ° and in this embodiment is approx . 40 ° and that The ratio of the distance between the two axes of rotation 4 and 11 to the mandrel axis is approximately 1.3 to 1.4.

The deflection roller 17.1 for the first pressure belt 5.1 and the deflection roller 21.1 each have a corresponding roller 17.2 and 21.2 assigned to them, with which they each form a functional pair . These two pairs 17.1, 17.2 and 21.1, 21.2 can be moved by means of a conveyor chain 8 along a link or rail, not shown here, or by a stable chain guide. This movement path makes it possible to lift the pressure belts for ejecting the full roll of printed products from their pressure position and thus to release the roll. The exact functioning of these deflecting roller pairs 17.1, 17.2 and 21.1, 21.2 will be explained in more detail with reference to FIG. 3.

FIG. 2 now shows the same arrangement, however, shortly before the winding process is completed, ie when the print product roll 7 is almost full. With the exception of the rollers mounted on the swivel arm 6 and on the belt conveyor 3, all other deflection rollers are in the same position as at the start of the winding process. The swivel arm 6 has been swiveled outwards due to the radial increase in the print product roll and is now in its intermediate position 6 ″, which is shown in an extended position. The belt conveyor 3 was also pivoted outwards into the position 3 ″, which is also shown in an extended position. The present invention makes it possible to arrange the winding mandrel 1 in a fixed manner with respect to the frame 2 by pivoting the belt conveyor 3 away, ie it is not necessary, as in conventional devices, for the winding mandrel to be fastened, for example, to a pivotable support arm. On the one hand, this allows the mechanics to be simplified, since the position of the generally heavy printed product roll is not changed must, on the other hand, a higher processing speed and easier manipulation can be achieved.

As can be seen from FIG. 2, the two belts 5.1, 5.2 loop around the full printed product roll over almost the entire circumference, with the exception of an open sector of approximately 40 ° in the lower, right area of the roll. It can also be seen that the first belt 5.1 now covers the periphery over a sector α₁ of almost 180 ° and the second belt 5.2 a sector β₁ of approximately 210 °. Since almost the entire circumference of the printed product roll 7 is thus captured by the pressing device, a very high tension can also be exerted by the pressing belt as required, without the printed product roll being deformed asymmetrically during the winding process or without adversely affecting the rotational behavior of the roll. Another advantage of the present exemplary embodiment is that an area 19 of the printed product roll, which is pressed on simultaneously by both pressure belts 5.1, 5.2 , and which therefore exerts a greater pressure in the direction of arrow F compared to other peripheral areas, lies opposite the belt conveyor 3 (related to mandrel 1).

The extraction is now a filled pressure product roll 7 illustrates the removal or ejection of a filled roll is carried out at ventilated pressing belts, ie, between the belts 5.1, 5.2 and the winding 7, there is a free space with reference to FIG. 3 In order to vent the pressure belts 5.1, 5.2, the deflection roller pairs 17.1, 17.2 and 21.1, 21.2 (see FIGS. 1 and 2) are displaced (starting from the situation shown in FIG. 2) along their path of movement, specifically from the one in FIGS 2 shown position (labeled 'in Figure 3) in a ventilation position (labeled'''). This leads to the position shown in FIG Pressure belt 5.1, 5.2. The full winding 7 remains unchanged in its position. The present invention enables complete and rapid ventilation of the pressure belts, as will be explained in detail below. In terms of ventilation, four movement elements or movement groups are essential. These are the swiveling belt conveyor 3, the swivel arm 6 and the two pairs of guide rollers 17.1, 17.2 and 21.1, 21.2. These four movement groups are moved essentially simultaneously or in quick succession from their pressing position (cf. FIG. 2) to the release position (FIG. 3). Since the parts to be moved are relatively light parts (that is, above all, the printed product roll does not have to be moved), this process can take place relatively quickly. The belt conveyor 3 is pivoted about its axis of rotation 4 and brought into its release position 3 '''(shown in solid lines) and is thus spaced apart from the printed product roll. In a similar way, the swivel arm 6 is pivoted into its outermost position 6 '''(shown in solid lines) and thus also spaced apart from the printed product roll. As can easily be seen from FIG. 2, however, simply swiveling these two units away would not be sufficient to cancel the previously caused looping of the periphery of the winding. Rather, the two pairs of guide rollers 17.1, 17.2 and 21.1, 21.2 are pivoted from their original position (17.1 ', 17.2', 21.1 ', 21.2', shown in dash-dot lines) by means of the conveyor chain 8, along a predetermined movement path (movement backdrop or stable chain guide) that they come into a new position (17.1 ''',17.2''', 21.1 ''',21.2''', shown in solid lines). It is easy to see that the deflecting roller pairs essentially follow the course of the conveyor chain 8 to which they are connected, as indicated by a dash-dotted line. The deflection rollers 17.1, 17.2 (in reverse operation) move on the outer chain track and the deflection rollers 21.1, 21.2 accordingly on the inner chain track. The course of this revolving conveyor chain 8 is predetermined by means of deflecting rollers 9.1-9.4 and has a U-shaped course, this U being opened to such an extent that the deflecting roller pairs 17.1, 17.2 and 21.1, 21.2 can be guided with free space around a roll of printed products. As can be seen from FIGS. 1 to 3, only one of the two rollers 17.1, 17.2 or the rollers 21.1, 21.2 is active, ie a pressure belt is moving. In the pressing position it is the two deflection rollers 17.1 and 21.1 which are active, in the release position according to FIG. 3 it is the two rollers 17.2 and 21.2. The deflection roller pairs 17.1, 17.2 and 21.1, 21.2 are accordingly moved alternately in two positions, namely on the one hand the pressing position (denoted by ', dash-dotted) and on the other hand the release position (denoted by''', extended). These two positions are opposite each other with respect to the winding mandrel 1. The conveyor chain 8 is guided in the respective areas around a deflection or drive roller 18.1, 18.2. The conveyor chain is driven on both sides by a drive, not shown here, for example an electric motor. The movement of the swivel arm 6 and of the belt conveyor 3 is preferably also effected via the same drive, so that a coordinated movement is created between these movement groups. Simultaneously with the movement of these parts into their release position, the length of the belts 5.1, 5.2 is adjusted by means of the deflection roller 16.1, or their tension is reduced. Of course, the end of the holding element must be fastened to the winding before or at the same time as it is being released so that the printed product winding maintains its structure after it has been released. The actual ejection of the full roll finally takes place in a conventional manner, for example with an ejection plate as is known from EP-A-0 313 781.

The straps 5.1, 5.2 are preferably made of a slightly elastic plastic. Of course, belts or other circumferential belt materials can also be used as elements equivalent to the belts. In a special embodiment of the invention, belts with structured surfaces, for example transverse grooves, are used. If necessary, you can the belts also have different structures, for example the belt at the inlet with a surface structure and the other belt smooth.

FIGS. 4 to 6 show a second, exemplary embodiment of the pressing and holding device according to the invention, specifically at the start of the winding process (FIG. 4), that is to say with the winding still empty, with the winding fully or nearly full (FIG. 5) and after the pressing and retaining elements from the wrap (Figure 6), ie in the released state. Different parts of the device are moved during the winding process and for airing and thus assume different positions in the three figures. When the winding is empty (FIG. 4), it is denoted by ', when it is fully wound (FIG. 5) it is denoted by''and in the released state (FIG. 6) it is denoted by'''. In each figure, a position of the moving parts, which corresponds to another figure, is also shown in dash-dotted lines to illustrate the movement.

The embodiment of the device according to the invention shown in FIGS. 4 to 6 is based on the same principle as the embodiment shown in FIGS. 1 to 3, that is to say on the pressing and holding of the printed products during winding by means of two pressure belts over the largest possible sector. Different parts of the device in both embodiments have the same function and essentially the same shape and position and are therefore identified by the same reference numerals. These are in particular: the winding mandrel 1, the frame 2, the belt conveyor 3 which can be pivoted about the pivot axis 4 with pivoting positions 3 ', 3''and3''', the two pressure belts 5.1 and 5.2, and the pivot arm 6 which can be pivoted about the pivot axis 11 Swivel positions 6 ', 6''and6''' and the two small deflection rollers 10.1 and 10.2 arranged thereon, the printed product roll 7, the deflection roller 12 arranged coaxially with the swivel axis 11, the Deflection rollers 13 and 14, the drive roller 15, the deflection rollers 16.1, 16.2 and 16.3, and the two wrap angles α and β.

The difference between the two embodiments lies above all in the embodiment of those parts which serve to release the pressure belts 5.1 and 5.2 before the winding change and the winding change itself. The winding change takes place with the embodiment shown in Figures 1 to 3 in four successive steps: First, the pressure belts are released by moving different pulleys with the help of the chain drive from one side of the winding to the other side, then the finished one The reel is ejected with the help of an ejection plate, then the ejection plate is moved back, then the deflection rollers are moved back. After carrying out the four steps, the winding station is again ready for winding. The winding change in the embodiment represented by FIGS. 4 to 6 also takes place in four steps: First, the pressure belts are released by means of various deflection rollers with the help of levers on which they are arranged , shifted from one side to the other side of the reel, then the reel is ejected with the help of an ejection plate, then the deflection rollers are moved back. After completing these three steps, the winding station is ready for winding again. The ejection plate can be moved back during the winding process. Since the displacement of the deflection rollers by means of levers is faster than that with a chain hoist and, above all, because the ejection plate is moved back during the winding process, an even faster winding change is possible with the second embodiment (FIGS. 4 to 6). The sequence of the entire winding process with the winding change is described in detail with reference to FIG. 7.

FIG. 4 shows this second exemplary embodiment of the device according to the invention with an empty winding, that is to say shortly before the actual winding process. The parts of the device which move during winding due to the changing radius of the growing reel are also shown in dash-dotted lines for a larger or finished reel, while the pressure belts 5.1 and 5.2 are only shown for the state when the reel is empty.

The course of the first pressure belt 5.1 in the winding direction (counterclockwise in the figure) is the following: The first pressure belt 5.1 runs around the two small deflection rollers 10.1 and 10.2, which are arranged on the swivel arm 6, away from the winding mandrel. When the mandrel is empty, the swivel arm 6 has the swivel position 6 ', that is to say it is tangential to the mandrel 1. From the deflection roller 10.2, the first pressure belt runs onto the deflection roller 12, which is arranged coaxially with the swivel axis 11 of the swivel arm 6, and over two further deflection rollers 13 and 14 to the drive roller 15 and from there via three further deflection rollers 16.1, 16.2 and 16.3, the roller 16.1 being displaceable in such a way that the different belt lengths required by the different winding diameters can be compensated for by their position. The first pressure belt 5.1 runs from the deflection roller 16.3 back to the winding mandrel via a further deflection roller 41.

The course of the second pressure belt 5.2 in the same direction is as follows: The second pressure belt 5.2 runs away from the winding mandrel together with the first pressure belt 5.1 via the deflection rollers 13 and 14 to the drive roller 15 and from there via the deflection rollers 16.1, 16.2 and 16.3. From the deflection roller 16.3 it runs via three further deflection rollers 42, 43 and 44 back to the winding mandrel 1. The deflection roller 42 is coaxial with the pivot axis 45 of a second swivel arm 46, the deflection rollers 43 and 44 on the latter second swivel arm 46 arranged. The second swivel arm 46 performs the same function for the second pressure belt 5.2 as the swivel arm 6 for the first pressure belt 5.1, namely that of adapting the course of the belt to the growing reel and pressing it against the reel. For this reason, the swivel arm 46 assumes different swivel positions, namely position 46 'when the reel is empty, 46''when the reel is larger or full. The swivel arm 46 is part of a lever system which also serves the ventilation process and which will be described in detail in connection with FIG. 6. The second pressure belt 5.2 runs from the deflection roller 44 back to the winding mandrel.

In this second embodiment, too, the two pressure belts 5.1 and 5.2 wrap around the winding mandrel 1 with wrap angles a and β, where α is approximately 140 °, β approximately 160 °, so that the open sector for the introduction of the printed products is also approximately 60 ° here . The two sectors advantageously overlap slightly. Since the overlap grows during winding, it is not absolutely necessary that the two sectors overlap when the winding is empty. Even a short piece of the circumference of the winding mandrel can remain unwrapped as long as the length of this piece does not exceed the length of the printed products being wound up.

Furthermore, FIG. 4 shows an ejection plate 50 which is operatively connected via a plate lever 51 to a drive 52, which is only shown schematically, in such a way that the ejection plate 50 on the one hand in the paper plane of the figure according to arrow P from a position 50 'to a position 50'' pivotable, on the other hand perpendicular to the paper plane, parallel to the axis of the winding mandrel 1, is displaceable. It can be seen from the figure that when the reel is empty (extended positions of the moving parts), the ejection plate 50 can be displaced perpendicular to the paper plane of the figure without being moved by another Part of the facility to be disturbed. This is obviously still possible if the winding already has a limited diameter, i.e. if the moving parts (3, 6 and 46) have already moved against their position labeled ''.

FIG. 5 now shows the same embodiment of the device according to the invention as FIG. 4 with a full or almost full print product roll 7. Compared to FIG. 4, in this figure the belt conveyor 3, the swivel arm 6 and the second one have, corresponding to the increased radius of the roll 7 compared to the empty roll Swivel arm 46 other swivel positions (3 '', 6 '' and 46 ''). The corresponding positions (3 ', 6' and 46 ') for the empty roll are shown in dash-dot lines. The displaceable deflection roller 16.1 also has a different position. The course of the two pressure belts 5.1 and 5.2 over the different deflection rollers, which is only shown for the extended positions of the moving parts (3, 6 and 46), is due to the changed positions of the deflection rollers 10.1, 10.2, 16.1, 43 and 44 Figure 4 changed. The new wrap angles α 'and β' are now approx. 180 ° and approx. 190 °, where they overlap and leave a sector of approx. 40 ° open.

The ejection plate 50 also has a changed position 50 ″ with respect to FIG. 4 (50 '). It is now on the side of the winding 7, so that the winding is ejected when the ejection plate 50 is moved away from the viewer perpendicular to the paper plane in the figure with the aid of the drive 52, which of course is only possible when the belts are released.

FIG. 6 illustrates the ejection of a full roll of printed products 7 and the necessary release of the pressure belts. The one for that Airing and ejecting moving parts are extended in their new positions compared to FIGS. 4 and 5 and labeled with ''', dot-dashed in the position before airing (with full print product roll) and again labeled with''. The two pressure belts 5.1 and 5.2 are only shown in their released position.

In the released position, the belt conveyor 3 and the swivel arm 6 are pivoted away from the reel (positions 3 '''and6'''). The deflection rollers 41, 42, 43 and 44 are shifted relative to their winding position (FIGS. 4 and 5) in such a way that the pressure belts no longer come into contact with the winding 7. The displacement of the deflection rollers 41, 42, 43 and 44 is realized by a pivoting movement of a ventilation lever 60, on which the deflection rollers 41 and 42 are not displaceable relative to the ventilation lever 60, the second pivot arm 46 and thus the deflection rollers 43 and 44 are arranged pivotably. The ventilation lever 60, which is not shown in FIGS. 4 and 5, has an unchanged position 60 '(dot-dash line) during the winding process. It is arranged to the side of the winding 7 (raised from the paper plane against the viewer in the figure), so that it does not come into conflict with the growing winding. As already described, only the pivot position of the second pivot arm 46 changes during the winding process. For the ventilation process, the ventilation lever 60 is now pivoted from its winding position 60 'into its ventilation position 60''', for example with a corresponding link (not shown). ensures that the second swivel arm 46 changes its swivel position relative to the ventilation lever 60 in such a way that it is swiveled from a swivel position 46 ″ into a swivel position 46 ″ ″. From the figure it can be seen that the movement of the second swivel arm 46 necessary for the ventilation of the pressure belts must take place before or at least simultaneously with the pivoting of the ventilation lever 60, because only in this way is it possible to move the second Swivel arm 46 and the pressure rollers 43 and 44 to move around the winding.

By pivoting the ventilation lever 60 for ventilation, all the parts of the pressing device required for the pressing function are removed from the area of the drive 52 and the plate bracket 51, thereby freeing them for an ejection movement parallel to the winding axis, i.e. perpendicular to the paper plane of the figure , away from the viewer. As soon as the ejection plate 50 has pushed the winding out of the area of the pressing arms, these can be brought back into the winding position (FIG. 4) by swiveling back the ventilation lever 60, the second swivel arm 46 and the swivel arm 6. When the belt conveyor has also returned to the winding position, a new winding process can begin.

During a first phase of the winding process, the ejection plate 50 is first brought into its swivel position corresponding to the position 50 ', then moved parallel to the winding axis and then brought into the ejection position 50' 'by pivoting again.

FIG. 7 shows the timing of the movements necessary for a complete winding cycle W of an exemplary application for the embodiment of the device according to the invention according to FIGS. 4 to 6.

The horizontal of the diagram is divided into steps of 0.2 seconds, the individual steps of the winding cycle (winding and winding change) are indicated one below the other. The duration of the individual steps is marked with horizontal bars. The winding change is carried out by first simultaneous release of the pressure belts and swiveling up the ejection plate, second ejection of the winding and third simultaneous closing of the pressure belts and swiveling of the ejection plate. With the device described, it is possible to carry out the winding change in less than two seconds. The ejection plate is retracted during the winding. As described above, the swiveling and swiveling of the ejection plate can also be carried out during the winding. However, since the winding can only be moved when the belts are, so to speak, completely released, and since the swiveling of the ejection plate takes less time for this embodiment than the lifting, swiveling the ejection plate during the winding cannot be shortened.

The length of an effective winding cycle depends on the one hand on application-dependent winding and on the other hand on device-dependent ventilation and ejection. These three steps determine the time required for an entire winding cycle.

The movements of the belt conveyor 3, the swivel arm 6 and the ventilation lever 60 necessary for the release of the pressure belts can be generated, for example, with three different, appropriately controlled drives or with a single drive.

Claims (16)

1. Pressing device for winding machines for producing tubular packages of printed products wound up to form a roll and a holding element passing round the roll from printed products supplied in scale formation such as newspapers periodicals and the like, the winding machine having a winding station with a fixed winding mandrel (1) and a supply means (3) adaptable by pivoting to the diameter of the roll which grows during the winding process, the pressing device being completely removable from the roll for removing the roll from the winding machine, the pressing device has at least two pressing belts 5.1, 5.2 guided via two guide pulleys, at least part of the guide pulleys for articulating the belts on the periphery of the winding mandrel, respectively the growing roll is located on the pivotable parts (3,6,46) and the pressing belts (5.1,5.2) loop the winding mandrel or the roll formed during the entire winding process over a sector of at least 270°, characterized in that the guide pulleys of a first and a second belt (5.1 or 5.2) are so arranged in partly fixed manner and partly on the pivotable parts (3,6,46) in overlapping sectors about the winding mandrel or roll formed that the first belt (5.1) engages on the periphery of the winding mandrel or roll over a pressing sector (α) of at least 130° and that the second belt (5.2) is guided in a U-shaped loop around the winding mandrel or roll and whose periphery engages over a pressing sector (β) of at least 160°, the pressing sectors being separated from one another when the winding mandrel is empty or slightly overlap one another and in which the overlap increases with increasing roll diameter.
2. Pressing device according to claim 1, characterized in that the boundary or overlap area (19) of the pressing sectors (α,β), relative to the winding mandrel (1), faces the supply means (3).
3. Pressing device according to one of the claims 1 to 3 (sic) characterized in that the first pressing belt (5.1) is guided by at least one guide pulley (10.1) on a swinging arm (6), the second pressing belt (5.2) by at least one guide pulley (5.3) on a belt conveyor (3) used as a supply means for the printed products and pivotable about an axis (11), on the periphery of the winding mandrel or the roll formed and that the belt conveyor (3) is so positioned with respect to the swinging arm (6) that in the case of engagement on the empty winding mandrel (1) of the swinging arm (6) and the belt conveyor (3) an angle of 30 to 45° is formed and the ratio of the spacing of the rotation axes (4,11) to the axis of the winding mandrel (1) is 1.3 to 1.4.
4. Pressing device according to one of the claims 2 or 3, characterized in that the swinging arm (6) for the first belt (5.1), at least at its free end, contains a small guide pulley (10.1) having a radius of less than 0.5 cm.
5. Pressing device according to one of the claims 1 to 5 (sic), characterized in that the movement groups (3,6,8,17.1,17.2,21.1,21.2) are present for the complete removal of the pressing belts (5.1,5.2) from a finished roll.
6. Pressing device according to claim 5, characterized in that the movement groups for the complete removal of the pressing belts (5.1,5.2) contain two pairs of guide pulleys (17.1,17.2,21.1,21.2) adjustable along a movement link.
7. Pressing device according to one of the claims 1 to 3, characterized in that the first pressing belt (5.1) is guided by at least one guide pulley (10.1) on a swinging arm (6) and the second pressing belt (5.2) by at least one guide pulley (44) on a further swinging arm (46) against the winding mandrel or against the roll formed.
8. Pressing device according to claim 7, characterized in that it has a raising lever (60) on which is arranged in stationary manner at least one guide pulley (41,42) over which runs one of the belts (5.1,5.2) during winding and in pivotable manner the further swinging lever (46) and that the raising lever (60) is operatively connected to a drive in such a way that it is pivotable at right angles to the roll axis.
9. Pressing device according to claim 8, characterized in that it has guides, so that during the pivoting movement of the raising lever (60) the further swinging arm (46) is movable about the winding mandrel or roll.
10. Pressing device according to one of the claims 7 to 9, characterized in that it has an ejector plate (50) which is so operatively connected to a drive (52, 51), that on the one hand it is pivotable at right angles to the axis of the winding mandrel (1) and on the other is displaceable parallel to the mandrel axis.
11. Pressing device according to one of the claims 1 to 10, characterized in that tor adjusting the belt lengths is provided a guide pulley (16.1) adjustable in two directions (A₁,A₂) and both pressing belts (5.1,5.2) are guided about the same.
12. Pressing device according to one of the claims 1 to 11, characterized in that at least one pressing belt (5.1,5.2) has a structured surface.
13. Operation of a pressing device tor winding machines according to one of the claims 1 to 12, characterized in that the tensile force of the pressing belts (5.1,5.2) is controlled during the winding process.
14. Operation of a pressing device according to claim 10, characterized in that for changing the roll firstly simultaneously the pressing belts (5.1,5.2) are removed from the roll and the ejector plate (50) is pivoted laterally on the roll (7) that when by moving the ejector plate (50) parallel to the axis of the winding mandrel (1) the roll is ejected and that subsequently simultaneously the ejector plate (50) is pivoted and the belts (5.1,5.2) closed around the winding mandrel.
15. Operation according to claim 14, characterized in that the ejector plate (50) is moved parallel to the axis of the winding mandrel (1) during the winding process.
16. Operation according to claim 15, characterized in that during the winding process the ejector plate (50) is pivoted perpendicular to the axis of the winding mandrel (1).

Images