EP1997755B1 - Device for unwinding the coil of a sheet of material from a coil reel - Google Patents

Abstract

The method involves making a de-rinded sleeve (2) free from a stationary storage during the entire unwinding process by applying a tangential force, in an area of an outer circumference (26) of the sleeve of a driving unit (5), opposite to the rolling up direction in rotating motion. An unwound material web (3) is led away by a guiding force from sleeve. The sleeve has a winding start opening (15) in the de-rinding device. An independent claim is also included for device for de-rinding a sleeve from a sleeve reel, particularly de-rinding device.

Description

The invention relates to a device for Abschwarten a roll of a material web of a winding drum, in particular Abschwartvorrichtung, wherein at least one drive means for rotating the roll and at least one guide means for guiding the winding due to the rotation of the winding drum on a flow line expired winding start and the remaining web of the Wickels are provided in a rejects container, wherein the drive means and the guide means comprise at least one drivable, movable and flexible surface, wherein at least one support roller is provided which supports the belt in the belt circumferential direction of the winding is arranged downstream of the Abwickelbett arranged substantially in a horizontal plane is or inclined to a horizontal plane.

In the production of material webs, in particular fibrous webs in the form of paper or board webs by means of a paper machine, an endless web is usually produced, which is wound up in the end region of the paper machine on empty reels for the production of winding tambours. The wound-up paper web is then further transported for subsequent treatment in a processing machine, for example in a slitter rewinder, a rewinder, a calender or a finishing machine, such as a coater, and unwound by means of a corresponding unwinding device. This fall both in the winding and unwinding of this winding reels certain amounts of waste, their treatment and return to the manufacturing process can be very complicated and can lead to major disabilities in the process.

Methods are known in which, to remove the core board on winding reels placed above a broke bin, the remaining coiled rind is manually cut with a knife, an ax, a scraper or the like and then removed. Since the process takes place manually in the vicinity of the open during this process broke container, the separation-making personnel is exposed to significant risks. Furthermore, there is a risk of cuts and injuries due to falling ropes. Furthermore, the core can be damaged during cutting by the use of sharp-edged tools or other cutting means, so that reuse is eliminated.

In addition, mechanical methods are also known, for example the use of circular knives, blades or scrapers. However, these also have the disadvantage that when cutting the remaining winding rind damage to the cover of the winding core can not be prevented with certainty.

All these known methods also have the disadvantage of often more complex handling for the winding reel. These must first be transported with a crane, a cart, a lifting device or the like to a location in which it is possible to remove the committee in the form of a residual rind of the winding tambours and dispose of in a waste container. After carrying out the descent, the hubs must be removed again.

By contrast, by the DE 30 30 845 A1 a device has become known, dropped by means of lighter cores made of cardboard or paper on a conveyor belt and moved against an abutment on which the translational movement converts into a rotational movement and so remaining on the winding cores residual webs in a designated Be discharged opening. By jerky stopping the conveyor belt completely empty the winding cores then roll due to their own inertial force against the conveying direction in a magazine.

Out GB 2 029 804 A a device for unwinding preferably caseless wound fiber webs is known, in which the pulp roller is located in a funnel-shaped abutment and their web is unwound against the direction of gravity, which is intended to cause a particularly stress-free treatment of the web material to be used.

The invention is therefore based on the object to develop a method and an apparatus for Abschwarten a roll such that the known from the prior art disadvantages are avoided and a simple way to eliminate the core committee of a web is created, on the one hand in handling the winding reel is relatively simple and is connected with little effort for the operator.

The solution according to the invention is characterized by the features of claim 1. Advantageous embodiments are described in each case in the subclaims.

The device for skinning a roll of a material web from a winding drum, in particular Abschschwartvorrichtung, according to the invention is characterized in that the unwinding from a first functional position in a second-functional position in which it is inclined relative to a horizontal plane, is pivotable.

With the solution according to the invention, an automatic device for unwinding is provided, which manages without the intervention of the operator and allows a Abschwarten up to the winding core.

To maintain the belt tension, at least one support roller is provided which, viewed in the belt circulation direction, supports the belt downstream of the belt.

The unwinding bed is preferably arranged substantially in a horizontal plane according to a first embodiment. To increase the unwinding speed with additional utilization of the slope-down force, the unwinding bed is inclined relative to a horizontal plane according to a particularly advantageous second embodiment.

In order to enable both functional positions, the unwinding bed is pivotable from a first functional position into a second functional position, in which it is inclined relative to a horizontal plane. As a result, different process parameters can be set with the same drive parameters with one device.

According to a particularly advantageous embodiment, the drive device and the guide device are formed by a single conveyor.

This solution is characterized by a particularly low design effort, since only the winding must be placed free from storage on a conveyor, which then triggers the unwinding process solely by moving the winding-carrying belt and at the same time serves as a guide device for the unwound material web.

According to a particularly advantageous embodiment, the second functional position can be designed as a division of labor and the first as a rest position, wherein means for pivoting the Abwickelbettes is positively coupled to the opening of the reject container, so that it always remains closed in the rest position.

To prevent the looping of the tape through the unwound web, this is in a deflection region of the tape a Scraper assigned. This is preferably arranged such that it is aligned in the vertical direction and forms a guide wall for the unwound material web.

To uncontrolled uncontrolled movements of the winding inclined to the width direction of the device is preferably arranged in the direction of movement of the moving surface of the winding downstream of a device for supporting the outer periphery of the roll. In the simplest case, this comprises a plurality of rotatably mounted rollers, which act on the outer circumference of the coil.

According to a further development, a device for detecting a size that at least indirectly characterizes the winding end is provided. This variable is processed in a control andlor the control device associated with the device and formed a control variable for controlling a control device for deactivating the drive means and the guide means, whereby they are stopped and thus a transport of the empty beater towards rejects and possible damage can be avoided.

Figur 1

verdeutlicht in schematisiert vereinfachter Darstellung eine erste Grundausführung einer erfindungsgemäßen Vorrichtung zum Abschwarten eines Wickels einer Materialbahn von einem Wickeltambour;

Figur 2

verdeutlicht eine Ansicht von vom;

Figur 3

verdeutlicht In schematisiert vereinfachter Darstellung eine Ansicht mit einer geneigten Förderposition gemäß Figur 1.

The solution according to the invention is explained below with reference to figures. The following is shown in detail:

FIG. 1

illustrates in schematic simplified representation of a first basic embodiment of a device according to the invention for Abschwarten a roll of a material web of a winding drum;

FIG. 2

illustrates a view of the;

FIG. 3

illustrates in schematic simplified representation of a view with an inclined conveying position according to FIG. 1 ,

The FIG. 1 illustrates in a schematic highly simplified representation of the basic structure of a device 1 according to the invention for Abschwarten a formed on a spool from a web of material 3 winding 2, which forms the winding drum 4 together with the empty mandrel. The material web 3 is an example of a paper web. However, the invention is also applicable to other webs that can be handled similarly. These are, for example, but not exclusively, sheets of cardboard or tissue or films of metal or plastic.

The device 1 for deswelling of the roll 2 here comprises a drive means 5 for generating a rotary movement of the roll 2 about its longitudinal axis L ₂ for unwinding the material web 3 from the winding drum 4 and a guide means 6 for guiding the expired on a discharge line AP winding start 15 and the remaining unwound material web 3 from the winding drum 4 to a reject container 7. To strip the unwound material web 3 of the Führungseinrtchtung 6 a stripping device 8 is provided. The guide device 6 and the stripping device 8 include moving and flexible, that is non-rigid surfaces 28 and 29, wherein on the moving surface 28 a circumferential force F _u (arrow) as a driving force in the region of the outer periphery 26, preferably directly on the outer circumference 26, the winding drum 4th becomes effective and on the moving surface 29 here a guide F _f (arrow) is generated to guide the unwound material web.

According to the invention, the guide device 6 and the drive device 5 are functionally integrated in one device and the moving surfaces 28, 29 are formed by a common surface. The drive device 5 and the guide device 6 are formed by a conveyor 9, in particular in the form of a belt conveyor 10. The belt conveyor 10 comprises an endless belt 13 or belt guided around and wrapped around at least two guide rollers 11 and 12. These can be any kind of endless ribbons. Preferably, one or a plurality of juxtaposed belts is provided. The functions of moving Surfaces 28, 29 are taken over here by the surface 14 of the band 13. At least one of the rollers 11 or 12 of the belt conveyor 10 is driven. By way of example, the guide roller 12 is driven. The drive takes place in at least one direction. This is indicated here by means of an arrow. In the running direction of the belt 13, in particular in the deflection region of the guide roller 12 for the belt 13, the stripping device 8 is arranged, which strips the unwound material web 3 from the surface 14 of the belt 13 so that it does not deflect with the belt 13 deflected on the guide roller 12 is continued. The stripping device 8 also acts as a further second guide device 27 for the unwound material web 3, in this case as a guide device to the reject container 7, which is arranged below the stripping device 8.

In the FIG. 1 the belt conveyor 10 is arranged such that the two guide rollers 11 and 12, which also function as guide rollers, are arranged in a horizontal plane extending across the width of the device 1 for descent and preferably on a frame, not shown here, which guide and arranged on the drive side frame and support units comprises, arranged and stored. The belt 13, in particular the area located between the two guide rollers 11, 12, on which a support of the roll 2 takes place, forms an unwinding bed 30, which in the embodiment according to FIG FIG. 1 is substantially in a horizontal plane. The waiting roll 2 is stored on the belt 13 free of storage of the winding drum 4. The longitudinal axis L _{2 of} the roll 2, which corresponds to the longitudinal axis L _{4 of} the winding drum 4, refers to the winding drum 4 and is not stationary or there is no storage of the winding drum 4 on these axes. The storage of the roll 2 on the belt 13 and thus the conveyor or guide device 6, which also acts as a drive means 5, takes place such that the winding start 15 in the direction of rotation of the belt 13 and thus in the direction of force of the circumferential force F _u (arrow) , The winding start 15 forms the end of the wound material web 3 on the winding 2, which when unwinding forms virtually the beginning. The winding 2 is placed against the winding direction on the conveyor 9. In this case, the winding 2 is positioned such that it is arranged substantially parallel to the longitudinal axes of the guide rollers 11 and 12 with its longitudinal axis L ₄ determined by the winding drum 4. The winding drum 4 acts with its weight force G on the band 13, so that here a flat concerns due to the resulting voltage of the band 13 or sagging of the belt 13 with the winding drum 4 is generated in a partial area outer periphery 26 and thereby in a flat Support area 16 rests on the belt. The discharge line of the winding start 15, which is designated by AP, corresponds, with respect to the position of the roll 2 on the strip 13 in the direction of strip travel, to the rear end of the areal area 16.

The winding drum 4 is arranged with the one winding start 15 having winding 2 free of storage on the belt 13 and is used with its weight G of maintaining the belt tension. The drive device 5, in particular the conveyor 9, which at the same time also assumes the function of the guide device 6 by the tape guide, is preferably controllable / controllable. The taking place in the unwinding of the material web 3 movement of the belt 13, which is present as a translational movement, causes due to the resulting circumferential force F _u (arrow) on the winding 2, which is effective in the area covering area 16, a twisting movement of the coil and at the same time a transport of at the expiring at the point of time AP material web. The weight G of the roll 2 causes it, that does not roll away during the translational movement of the belt 13 or entrained, but that in fact a rotational movement is generated. To avoid uncontrolled movement of the roll 2, a device 17 is provided, which is preferably designed as a roller basket 18, stationarily positioned in the strip running direction in front of the winding 2 and is preferably mounted on the frame of the device 1.

Furthermore, in order to avoid an excessive sagging of the band 13 in the support region 16, a support roller 19 is provided, which is arranged downstream of the support region in the direction of belt travel.

Support roller 19 and roller cage 18 are arranged between the support region of the roll 2 and the stripping device 8.

The wound material web 3 is guided on the belt 13 in the direction of the guide roller 11 for reversing the belt 13 and scraped off by means of the stripping device 8. The arranged in the vertical direction below the stripping device 8 reject container 7, which is referred to in professional circles as a pulper, has a, the foundation 20, which carries the device 1, passing through shaft 21 which is temporarily closed to the manhole cover 22. This may for example be a rotary flap which is movable between a closed position and a passage position. The unwinding speed is a function of the rotational speed V _{U of} the conveyor 9, in particular the drive device 5, which also serves as a guide means 6 for the unwound material web 3. To be in the absence of a device 17, in particular of the roller basket 18, on or in which movably mounted rollers are arranged, in which in uncontrolled movement or initiation of momentary shocks on the winding, which can lead to uncontrolled movements, the winding 2 can support, without that the winding process is interrupted, to prevent passage or damage to the unwound winding drum 4, a device 23 for detecting the material web end 24 is provided which comprises, for example, at least one optical sensor and detects a signal for a control device 25, which in the presence of passing the material web end 24 at least indirectly characterizing size stops the conveyor 9, in the simplest case by controlling the drive means 5 and the guide means 6 associated adjusting device. The then empty winding drum 4 can be removed from the conveyor 9 without damage.

The FIG. 2 is a view from the front of the device 1 for Abschwarten a material web 3. Visible is the Abstreifrechen the stripping device 8 for stripping the web 3 on the belt, the roller cage 18 and the angle 2. It can be seen that all facilities across the entire width the Abschwartvorrichtung 1, but at least preferably over the width of the coil 2 extend. In this case, with the solution according to the invention even smaller rolls can be handled, but in each case a device 17 is required to prevent the winding 2 of a deflection from a parallel position of the longitudinal axis of the coil 2 to the longitudinal axes of the deflecting elements 11, 12.

As in FIG. 3 shown, the drive means 5 and the guide means 6 is pivotally formed from the horizontal position. This is illustrated here by means of an arrow. While the FIG. 1 describes the horizontal orientation of the conveyor, illustrates FIG. 3 a conveying position, which is designated here by II and which allows higher Abwickelgeschwindigkelten because here additionally acts in a conveying direction component of the weight G acts with the applied by the conveyor belt 9 on the outer periphery 26 of the roll 2 circumferential force F _u (arrow) superimposed and thus allows an increase in Abwinkelgeschwindlgkeit. Mandatory here is the device 17 for fixing the position of the roll or to limit the mobility of the roll 2 in the unwinding or in the direction of the translational movement of the belt 13. The basic structure corresponds to the In FIG. 1 Therefore, the same reference numerals are used for the same elements. The pivoting can be done in different ways. Preferably, only the rear guide roller 12 is pivoted about the front guide roller in the direction of tape 11. This means that the latter remains stationary. Furthermore, according to a particularly advantageous embodiment, the pivoting of the conveyor 9 is forcibly coupled with an opening of the reject container 7, so that it is ensured that only actually An opening of the reject container 7 takes place when the drive device 5 or guide device 6 is in the conveying position.

The triggering of the pivoting operation can be triggered by the operator after placing the roll 2 on the belt 13 manually when needed. It is also conceivable to automate the process by a resting is detected when the roll 2 is resting and in this case the conveyor 9 is moved into the conveying position.

LIST OF REFERENCE NUMBERS

1

Device for skinning webs of material

2

reel

3

web

4

winding drum

5

driving means

6

guide means

7

Committee container

8th

stripping

9

Conveyor

10

belt conveyors

11

guide roller

12

guide roller

13

tape

14

surface

15

winding start

16

Flat bearing area

17

Facility

18

roller cage

19

supporting role

20

foundation

21

shaft

22

manhole cover

23

Facility

24

Web end

25

control device

26

outer periphery

27

guide means

28

Moving surface

29

Moving surface

30

Abwickelbett

31

adjustment

F _f

Executive (arrow)

F _u

Circumferential force (arrow)

L ₂

longitudinal axis

L ₄

longitudinal axis

Claims (9)

1. Apparatus (1) for squaring a roll (2) of a material web (3) from a winding spool (4), in particular squaring apparatus (1), at least one drive device (5) being provided for rotating the roll (2) and at least one guide device (6) being provided for guiding the roll start (15), which has unwound at an unwind line (AP) as a consequence of the rotation of the winding spool (4), and the remaining material web (3) of the roll (2) into a broke container (7), the drive device (5) and the guide device (6) comprising at least one flexible surface (14, 28, 29) which can be driven and moved, the drivable flexible surface (14, 28, 29) of the drive device (5) and the guide device (6) being formed by at least one belt (13) of a conveying device (9), which at least one belt (13) is guided around at least two deflecting rolls (11, 12), of which one can be driven, with the formation of an unwinding bed (30), at least one supporting roll (19) being provided which, arranged behind the roll (2) as viewed in the belt circulating direction, supports the belt (13), the unwinding bed (30) being arranged substantially in a horizontal plane or being inclined with respect to a horizontal plane, characterized in that the unwinding bed (30) can be pivoted out of a first functional position (I) into a second functional position (II) , in which it is inclined with respect to a horizontal plane.
2. Apparatus (1) according to Claim 1, characterized in that the individual drivable flexible surface (14, 28, 29) is formed by an endless circulating belt (13).
3. Apparatus (1) according to Claim 1 or 2, characterized in that the drive device (5) and the guide device (6) are formed by a single conveying device (10).
4. Apparatus (1) according to one of Claims 1 to 3, characterized in that a device for pivoting the unwinding bed (30) is positively coupled to an opening of the broke container (7).
5. Apparatus (1) according to one of Claims 1 to 4, characterized in that the belt (13) is assigned a stripping apparatus (8) in the desired receiving region for the unwound material web (3).
6. Apparatus (1) according to Claim 5, characterized in that the stripping apparatus (8) acts as a stationary guide device (27).
7. Apparatus (1) according to one of Claims 1 to 6, characterized in that a device (17) for supporting the outer circumference (26) of the roll (2) is arranged behind the roll (2) in the movement direction of the moving surface (14, 28, 29).
8. Apparatus (1) according to Claim 7, characterized in that the device (17) comprises a plurality of rotatably mounted rollers (18) which become active on the outer circumference (26) of the roll (2).
9. Apparatus (1) according to one of Claims 1 to 8, characterized in that a device (23) is provided for detecting a variable which characterizes the roll end (24) at least indirectly, is processed in a control and/or regulating apparatus (25) which is assigned to the apparatus (1), and forms an actuating variable for actuating a setting device for deactivating the drive and guide device (5, 6).

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