EP1454858B1 - Winder - Google Patents

Description

The invention relates to a rewinder with a contact roller, which is adjustable against the circumference of a roll and is divided into at least two roll segments. at least one of which has a positioning mechanism with which it can be switched on and off independently of another roller segment.

At the end of a rotary printing press, a printed web becomes a core. usually a cardboard tube, wound up. In the following, a known structure of a conventional rewinder will be described first.

The core is held with drivable chucks between two roller arms of the rewinder. Against the circumference of the core or wound thereon a winding roll can be adjusted, which presses the web against the winding during winding of the web. This should be prevented, above all, that air bubbles are trapped between the individual winding layers. The application roller is not driven, but runs freely with. It is employed with pneumatic cylinders *. The pneumatic adjusting mechanism and the application roller are carried by a carriage. If, as the winding radius increases, the pneumatic cylinders retract accordingly, the carriage returns a short distance, with the pneumatic cylinders extending again to keep the application roller engaged with the winding.

The core may be driven in opposite directions and the web is fed to the nip between the winder and the applicator roll either from above or below, depending on whether the web is wound inward with the printed side or with the printed side should.

The roller arms, which hold the core and the winding, are pivotable about an axis. When a maximum winding radius is reached, the roller arms pivot with the full winding from a winding position to a removal position in which the full winding can be removed. At the same time, more roller arms are pivoting, creating a new one. carry empty core, in the winding position. The web is first guided over pulleys to the removal position and is still wound up on the full winding. but runs close to the empty winding core over. The application roller is turned off so that they Train not touched. At the empty core, a splice is prepared for adhering the web. The acquisition of the web on the empty roll is done by the application roller is made at the appropriate moment against the empty core, so that the web is pressed against the splice and glued. At the same time the web between the empty core and the full roll is separated with a coarse toothed bladed knife. The severed end of the old railway will be on the old. wrapped up full wrap. On the new core, the short track section between the splice and the cut position is deflected and wrapped in a new reel as the web is wound onto the new core.

The described conventional rewinder makes it possible to exchange a full reel for a new core at full speed printing press.

When converting to another web width, the distance between the roller arms is varied according to the length of the core. The web width can vary, for example, over a range of 100% to 50% of the maximum web width. In the described conventional rewinder and the feed roller must be replaced by a roller of suitable length, otherwise the roller arms would abut with drives and bearings for the chuck on the longer feed roller. The replacement of the application roller is laborious.

From DE 101 31 364 A1 a rewinder according to the preamble of claim 1 is known, in which several thin webs are wound side by side on reels. In order to wind the winding with each uniform contact pressure, the application roller is divided into several pairs of roller segments, each abutting a roll of a thin web. The positioning positions of the respective roller segment pairs can be controlled individually. For aligning the application rollers pairs on the winding, the application pairs are mounted on an adjustable cross-beam in the direction of the winding axis. When changing the bandwidth of the webs adjacent application rollers pairs can be computer controlled coupled to form intrinsically rigid pressure rollers of greater width.

US 6 182 919 B1 describes a similar rewinder in which the roll segments are individually adjustable and can also be coupled. From US Pat. No. 5,806,783 a rewinder is known, in which roller segments of a rider roll are placed from above on reels resting on rolls. The US 3 512 72 describes a system for preventing deflection of a pressure roller of a web cutting device.

By the known from the cited references rewinder, the problem is solved that when winding several rolls next to each other in sections of the winding width due to differences in diameter of the winding slightly different Anstellpositionen may be required. It is also possible, when changing the subdivisions of the winding width, d. H. when changing the respective web width of the winding to couple adjacent Anstellwalzensegmente to cause a uniform setting position for each winding. However, the cited references do not deal with the case that the winding width is changed overall, and they do not take into account the above-described problem that in an Auhvickler, which winds a single winding, an adjustment of the length of the application roller to the distance between the roll arms of the roll must be done.

The object of the invention is therefore to provide a rewinder, which allows a simpler adjustment of the web width of the roll without replacing the application roller.

This object is achieved in a rewinder of the type described above in that the winding is held at its ends by roller arms. the distance between which is variable, and a roller segment opposite the roller arms can be turned off so far. that it has a distance from the roller arms in Abstellrichtung. The application roller may, for example, have a longer middle roller segment and be divided at its ends into a plurality of shorter roller segments. When changing the web width then no longer needs the application roller to be replaced, but it is by turning on or off the appropriate shorter segments at the ends of the application roller suitable for the web width length of the application roller adjustable.

Such a rewinder results in a significant saving in work and time when changing the web width. Besides, it is no longer necessary. To provide lay-up rolls of various lengths.

Advantageous embodiments of the invention will become apparent from the dependent claims.

In a preferred embodiment, the applicator roll is divided into a longer main roll segment and a plurality of shorter minor roll segments, with the main roll segment in the middle and the minor roll segments on both sides of the main roll segment. The main roller segment is fixedly attached to a rocker, whereas each secondary roller segment has its own Anstellmechanismus, which is also attached to the rocker. Each secondary roller segment is adjustable with its adjusting mechanism independently of the other roller segments in a first and a second position. In the first position, the secondary roll segment is axially aligned with the main roll segment, and in the second position, it is farther from the roll than the main roll segment. By pivoting the rocker, the main roller segment is set against axially aligned with the secondary roller segments against the core or the winding. A secondary roller segment located in the second position is so far away from the axis of the core. that it can not touch the roller arms with the drives and bearings for the chuck. The hiring of the roll segments to the winding or core can be done abruptly with a pneumatic cylinder to glue the web against a splice on an empty core while the printing press is running.

The separation of the web is preferably carried out with a coarse toothed blade, which is similar to the application roller is divided into several blade segments. Preferably, the doctor blade is divided at the same axial positions, the application roller, and when separating the web, the knife segments corresponding to the applied roller segments are deflected so that they separate the web.

The arrangement of the doctor blade and the structure of a device for replacing a full first coil against an empty core of a second coil can in a known manner according to the state described the technology be designed. The subdivided blunting knife is for this purpose preferably arranged to a core of an empty roll and a wound on the core of the empty roll and wound on a full web web, that with the sudden setting of the roll segments against the core of the empty roll between the salaried roll segments and traced to the core trajectory by a simultaneous deflection of the corresponding knife segments at a point between the core of the empty roll and the full roll is separable.

Preferably, with an arrangement of the axes of the roll and the subdivided application roller in a substantially horizontal plane, both below and above the subdivided application roller, a divided cut-off blade is arranged. About pulleys, the web can then be supplied both from above and from below the gap between the subdivided application roller and the winding, depending on whether the web is to be wound with the printed side inward or with the printed side to the outside.

In a further development of the rewinder according to the invention, the rocker with the main roller segment attached thereto and the adjusting mechanisms of the sub-roller segments relative to the reel and to a carriage which carries the rocker, in the axial direction is adjustable. This allows a finer adjustment of the length of the applied part of the application roller to the web width, because the web width is then variable by the width of a single secondary roller segment, for example, in an asymmetrical configuration, in which only a secondary roller segment is employed next to the end of the main roller segment, is aligned by the axial adjustment of the application roller to the web. In addition, such an axial adjustment always makes it possible to align the applicator roller so that the edge of the applicator roller or a roller segment does not coincide exactly with the end of the roller, which would lead to undesirably high edge pressures. Rather, the application roller can be adjusted so that it protrudes on both sides over the winding. For this purpose, the chucks for the core preferably each have on the outside a collar whose peripheral surface is flush with the peripheral surface of the core.

The subdivided blunting knife, if present, in this case preferably together with the rocker of the roller segments axially displaceable, so that it in corresponding Way to the web width and the axial position can be adjusted relative to the winding.

In the following an embodiment of the invention will be explained in more detail with reference to the drawing.

Fig. 1

einen Teil eines Querschnitts durch einen erfindungsgemäßen Aufwickler, bei dem alle Walzensegmente angestellt sind:

Fig. 2

einen horizontalen Längsschnitt auf der Höhe der Anlegewalze durch den Aufwickler aus Figur 1;

Fig. 3

einen Teil eines Querschnitts durch den Aufwickler, bei dem lediglich ein Hauptwalzensegment angestellt ist:

Fig. 4

einen Längsschnitt auf Höhe der Anlegewalze durch den Aufwickler aus Figur 3;

Fig. 5a bis 5c

Skizzen von an- und abgestellten Walzensegmenten bei verschiedenen Bahnbreiten;

Fig. 6a bis 6e

jeweils einen Querschnitt durch einen erfindungsgemäßen Aufwickler in verschiedenen Phasen des Aufwickelns;

Fig. 7

einen Ausschnitt aus Figur 6e mit der Anlegewalze und zwei Abschlagmessem; und

Fig. 8

einen Längsschnitt auf der Ebene eines Abschlagmessers durch den Aufwickler aus Figur 7.

Show it:

Fig. 1

a part of a cross section through a rewinder according to the invention, in which all roller segments are employed:

Fig. 2

a horizontal longitudinal section at the level of the application roller by the rewinder of Figure 1;

Fig. 3

a part of a cross-section through the rewinder, in which only one main roller segment is employed:

Fig. 4

a longitudinal section at the level of the application roller by the rewinder of Figure 3;

Fig. 5a to 5c

Sketches of attached and detached roll segments at different web widths;

Fig. 6a to 6e

in each case a cross section through a rewinder according to the invention in different phases of winding;

Fig. 7

a detail of Figure 6e with the application roller and two Abschlagmessem; and

Fig. 8

a longitudinal section on the plane of a blunting knife by the rewinder of Figure 7.

Figure 1 shows a part of a cross section through a rewinder according to the invention with a feed roller 10. the one web 12 against a core 13 of a Wickels 14 presses. The core 13 of the roll 14 is held with drivable chucks 16 between two roller arms 18.

The application roller 10 is divided into a plurality of roller segments, which are arranged coaxially in FIG. An axis 20 of a main roller segment of the application roller 10 is secured at its two ends with two holders 22 on a longitudinal strut 24 of a rocker 26. The rocker 26 is mounted with an axle 28 on a carriage 30. While the rocker 26 is employed with the main roller segment of the application roller 10 against the core of the Wikkels 14 via a pneumatic cylinder 32, can with the carriage 30 to which the rocker 26 and thus the application roller 10 are attached, the position of the rocker to the periphery of the coil 14 are adapted.

In the image plane of Figure 1 is located behind the main roller segment shown in cross-section of the application roller 10 a plurality of coaxially arranged secondary roller segments 34 (Figure 2), each with a Anstellmechanismus 36 with a rocker 38 and a pneumatic cylinder 40. The attached to a longitudinal strut 42 on the rocker 26 are.

The carriage 30 has cutouts 44 into which the roller arms 18 with drives and bearings for the chuck 16 of the still almost empty roll 14 protrude.

Figure 2 shows a longitudinal section through the rewinder of Figure 1 at the height of the axis 20 of the application roller 10. The application roller 10 is divided into a central main roller segment 46 and eight arranged at the ends of secondary roller segments 34. In this case, the main roller segment 46, whose length substantially corresponds to a minimum width of the web 12, about 50% of the maximum length of the application roller 10, while by the application of the shorter secondary roller segments, a stepwise adjustment of the length of the application roller in a range of 50% to 100% of the maximum length of the application roller can be done.

Shown are also the holder 22, with which the main roller segment 46 is attached to the longitudinal strut 24 of the rocker 26. The pneumatic cylinders 40 on the rockers 38 of the secondary roller segments 34 are attached to the longitudinal strut 42 of the rocker 26. Shown is also the axis 28th with the swingarm 26 is mounted on the carriage 30.

The core 13 of the still empty roll 14 is attached at its two ends to the driven chuck 16 and is held by the roller arms 18. The chucks for the core 13 each have on the outside a collar 48; whose peripheral surface is flush with the peripheral surface of the core 13.

FIG. 3 shows the part of the cross-section of the rewinder of FIG. 1, in which now the secondary roller segments 34 are in a second position, in which they do not rest against the reel 14. The pneumatic cylinders 40 are retracted, whereby the rockers 38 are pivoted about the axis 50. Only the main roller segment 46 is applied to the winding 14.

FIG. 4 shows a longitudinal section through the configuration of the rewinder illustrated in FIG. The length of the core 13 of the roll 14 is here less than the length of the main roller segment 46, and the roller arms 18 are brought to a corresponding distance. The non-applied secondary roller segments 34 are in this position so far away from the central axis 52 of the core 13 that they do not touch the roller arms 18 with the driven chucks 16.

In Figure 5, various configurations of the rewinder are sketched, each with different web widths. FIG. 5a shows a configuration with an employed secondary roller segment. FIG. 5b shows a configuration with two employed secondary roll segments, and FIG. 5c shows a configuration with four employed secondary roll segments.

In this case, Figure 5a shows an embodiment of the rewinder, in which the main roller segment 46 and the secondary roller segments 34 of the application roller 10 are axially displaceable relative to the winding 14. In the illustrated asymmetric configuration, only one secondary roll segment 34 is aligned coaxially with the main roll segment 46 so that the roll 14 may have a web width that is between the length of the main roll segment 46 and the length of the main roll segment 46 with two auxiliary roll segments 34 applied thereto FIG. 5b is the case. In addition to a finer adjustment to the width of the web, this adjustment also allows the application roller 10 always align so that the outer edge of the employee roll segments of the application roller 10 does not coincide exactly with the end of the coil 14. The application roller 10 is adjusted so that it projects beyond the winding 14 on both sides, so that undesirable high edge pressures are avoided.

FIGS. 6a to 6e show a sequence of different stages during winding up. Shown in each case is a cross section through the rewinder already shown in FIGS. 3 and 4, in which some secondary roller segments 34 of the application roller 10 are not aligned coaxially with the main roller segment 46, but are in the second position shown in FIG. This results in an adaptation of the width of the application roller 10 to the width of the web 12. The rocker 26 which carries the main roller segment 46 and the secondary roller segments 34 with their Anstellmechanismen 36 is mounted with its axis 28 on the carriage 30, wherein they pass through the pneumatic cylinder 32, which is arranged in series with another pneumatic cylinder 52, about the axis 28 is pivotable. The carriage 30 is slidably mounted on rails 54 which are fixed to a frame 56. Via guide rollers 58, the web 12 is guided to the gap between the application roller 10 and the winding 14. In the illustrated configuration, the web is fed from above. Alternatively, the web can also be fed from below via deflection rollers 60, as indicated by a dot-dash line. Above and below the rocker 26 is a respective Abschlagmesser 62. The structure will be explained below with reference to Figure 7, attached to the carriage 30.

The winding 14 is held on the roller arms 18, which are pivotable about an axis 66 together with further roller arms 64. Upon pivoting of the roller arms 18 and 64 about the axis 66 further deflection rollers 68 are moved on a support member 70.

While in FIG. 6a the winding 14 is still almost empty, FIG. 6b shows a winding-up stage in which the circumference of the roll 14 on the core 13 is significantly larger. The carriage 30 was thereby displaced on the rails 54, while the pneumatic cylinder 32 continues to press the application roller 10 against the circumference of the roll 14.

In Figure 6c is the winding. 14 wound to approximately a maximum winding radius: The carriage 30 has moved back accordingly. On the roller arms 64, a core 72 is held with a prepared splice 74 for a second winding 75. By being pivoted in the direction of arrow 76. replace the roller arms 18 with the roller arms 64 their position.

The resulting condition is shown in Figure 6d. Here, the new, empty core 72 of the roll 75 is in the position next to the application roller 10. However, the pneumatic cylinder 52 has retracted so far that the application roller 10 attached to the rocker 26 does not touch the web 12. The web 12 also does not touch the core 72, but passes the core 72 past the pulleys 68 to the full roll 14 where it continues to be wound up. The prepared splice 74 (FIG. 6c) on the empty core 72 is facing the applicator roller 10.

FIG. 6e shows the moment when the rocker 26 presses the application roller 10 against the empty core 72 via a sudden extension of the pneumatic cylinder 52. The web 12 is pressed against the prepared splice 74 (Figure 6c) and glued to the core 72. At the same time, the lower of the two striking blades 62 is deflected so that it cuts the web 12 at a location between the core 72 and the winding 14. The shorter free end 76 of the web 12 is wrapped in further winding in the winding 72, while the separated, longer remainder 78 of the web 12 is further wound onto the winding 14. The press can continue to run at full speed during this change of the winding. The full roll 14 can now be removed from the rewinder, so that again results in the state shown in Figure 6a.

FIG. 7 shows part of the cross section of the rewinder of FIG. 6e. in which the cutoff knives 62 are shown in more detail. Shown are in each case a segment of the upper and the lower cutting blade 62. Each knife segment has a roughly serrated blade 80 which is fixed to a base 82 of the knife segment. The main body 82 is attached via pivot arms 84 to a longitudinal strut 86 of the carriage 30. A deflection in the dashed lines shown for the lower deflection blade position is carried out by an extension of a pneumatic cylinder 88 which is attached via a further longitudinal strut 90 on the carriage 30. The separated from the lower blade 62 when deflecting remainder 78 of the web 12 is shown here by dashed lines.

FIG. 8 shows a longitudinal section through the rewinder at the level of a doctor blade 62. The doctor blade 62, like the application roller 10, is in segments divided. All segments of the blade 62 can be deflected by the pneumatic cylinder 88 independently of each other: A deflected position 92 of the blades 80 of the blade 62 is shown in dashed lines. The longer, middle knife segment 94 is moved by two pneumatic cylinders 88, while the shorter knife segments 95 are each moved by a pneumatic cylinder 88.

Although the principle of the invention has been described with reference to a specific embodiment, this embodiment is only to be regarded as an example of a rewinder according to the invention. However, the idea of the invention is not limited to the embodiment described. For example, a different distribution of the lengths of the roll segments is conceivable. In particular, however, the implementation of the inventive concept for winder with a different design is conceivable.

Claims (10)

1. Winder with a contacting roller (10), which can be placed against the periphery of a reel (14) and is divided into at least two roller segments (46; 34), of which at least one (34) has an engaging mechanism (38, 40), with which it can be engaged and disengaged independently of another roller segment (46), characterised in that the reel (14) has its ends held by roller arms (18) the spacing of which is adapted to be varied for the purpose of changing a web width, and a roller segment (34) opposing the roller arms (18) is adapted to be withdrawn so far that it is spaced away from the roller arms (18) in the direction of disengagement.
2. The winder of claim 1, characterised in that the contacting roller (10) can be shifted axially relatively to the reel (14).
3. The winder of claims 1 or 2, characterised by at least one cutting knife (62), which is divided into at least two knife segments (94: 95), of which at least one can be displaced independently of the other.
4. The winder of claims 2 and 3, characterised in that the divided cutting knife (62) can be shifted axially relatively to the reel (14) jointly with the divided contacting roller (10).
5. The winder of one of the claims 3 or 4, characterised in that the cutting knife (62) and the contacting roller (10) are divided at the same axial positions.
6. The winder of one of the preceding claims, characterised in that
   a main roller segment (46) and at least one subsidiary roller segment (34) of the contacting roller (10), said subsidiary roller segment having a contacting mechanism (38, 40), are disposed at an oscillating link (26),
   each subsidiary roller segment (34) can be shifted with its contacting mechanism (38, 40) independently of the other roller segments (34; 46) into a first and a second position, for which the subsidiary roller segment (34), in the first position, is aligned axially with the main roller segment (46) and, in the second position, is removed further than the main roller segment (46) from the reel (14), and,
   depending on the positions of the contacting mechanisms (38, 40) of the subsidiary roller segments (34), the main roller segment (46) or the main roller segment (46) and at least one of the subsidiary roller segments (34) can be placed against the reel (14) or a core (13) of the reel (14) by means of the oscillating link (26).
7. The winder of claim 6, characterised in that the main roller segment (46) or the main roller segment (46) and at least one of the subsidiary roller segments (34) can be placed abruptly, against the reel (14) or the core (13) of the reel (14) by pivoting the oscillating link (26) by means of a pneumatic cylinder (52).
8. The winder of claim 7 and one of the claims 3 to 5, characterised in that the at least one divided cutting knife (62) is disposed in such a manner with respect to the contacting roller (10), that a web (12), which is passed between the contacting roller (10) and a core (72) of a second reel (75) and wound on a first reel (14) and is clamped between the engaged roller segments (46; 34) and the core (72) by the sudden placement of at least the main roller segment (46) against the core (72) of the second reel (75), can be severed by a simultaneous displacement of the corresponding knife segments (94, 95) at a location between the core (72) of the second reel (75) and the first reel (14).
9. The winder of claim 8, characterised in that, if the axes of the core (72) of the second reel (75) and of the divided contacting roller (10) are disposed in an essentially horizontal plane, the web (12) can be supplied by means of suitably disposed turnaround rollers (58. 60) from above as well as from below the gap between the divided contacting roller (10) and the core (72) of the second reel (75), and divided cutting knives (62) are disposed above as well as below the divided contacting roller (10).
10. The winder of claim 2 and one of the claims 6 to 9, characterised in that the oscillating link (26) with the roller segments (46; 34) and, if present, the knife segments (94; 95) can be adjusted jointly and axially relative to the reel (14; 72) by a distance of at least half of the axial dimension of one subsidiary roller segment (34).

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