EP1593630A2 - Device for preparing a web wound into a stock roll - Google Patents

Abstract

Several radius measurement sensors (9, 11) are located parallel to the longitudinal axis (16) of the supply roll (1). They contact the supply roll, or are non-contacting sensors. They are optical or acoustic. The measurement beam of the sensors includes an angle (alpha ) of +-15[deg] with the horizontal, or is horizontal. The sensors are located at the side of the roller, at least three sensors being situated adjacently. There are at least a pair of sensors on diametrically-opposite sides of the roller. From the sensors, an analysis unit (26) determines variations from the ideal shape of the roller. Departures from roundness, are registered from radius variations and comparisons. Comparisons of radii from the group of sensors, establish any roll conicity. The evaluation unit is also implemented as a controller (24) using a common processor (13). This controls the adhesive tape dispenser. An interface provided, reads a data set in and out. The unit writes the measured radius and its departures into the data. The sensors (9, 11) are arranged in a unit applying adhesive tape (17). This can be moved parallel to the axis (16). Two rotary rollers (3) are associated with the supply roll and are positioned at differing heights, in accordance with the radius of the supply roll.

Description

The invention relates to a device for preparing a supply roll wound material web according to the preamble of claim 1.

To prepare the roll change brings a device, for. B. DE 102 35 784 A1 am outer end of a web which is wound to a supply roll to be loaded is a tape strip in the transverse direction, on the one hand the outer end to a underlying layer of the web adheres and so an uncontrolled unwinding the web prevents, if this during the roll change to a Running speed of the unwound from the supply roll to be replaced current Material web is accelerated, and on the other hand for sticking the web of the to be fed supply roll to the moving web. As soon as the Peripheral speed of the supply roll to be fed in the speed of the has reached the current web, the supply roll to be loaded and the current web pressed against each other. As a result, the outer end comes with the tape strip of the rotating to be loaded supply roll wound material web with the moving web of material to be replaced Supply roll in contact and is adhered to this. The running web breaks the attached to it with material web, wherein the tape strip of the under outer layer lying position of the web, and threads the Material web of the supply roll to be loaded into the machine. After done Sticking the webs together is the moving web at one point severed between the tape strip and the supply roll to be replaced.

In practice, however, it often happens that supply rolls to be loaded by a deviate from ideal cylindrical shape. For example, the supply roll after a long Storage times at a place where it is deposited on the ground, as a result of their Dead weight be flattened. The material web can also be wound incorrectly be, so that the supply roll z. B. has a conical or an eccentric outer shape. In addition, the supply roll due to previous bumps during transport the supply roll or due to inadvertently bouncing against the supply roll Be impressed locally. Such deviations in form prove above all during reel change, where the web is subjected to very strong forces, while being carried away by the running web, is especially critical. If the strip of adhesive tape does not open due to form deviations of the supply roll his entire length is pressed against the moving web, the tear web to be changed longitudinally. This makes an interruption of the Operating the web processing machine, replacing the damaged Material webs and possibly even repairs to the machines necessary.

DE 199 05 140 A1 describes methods and an apparatus for preparing the Supply roll, wherein by means of a single distance sensor, a deviation of the Diameter of a supply roll is determined by a predetermined diameter.

DE 695 01 317 T2 and DE 26 27 103 A1 disclose devices with the one Diameter of a supply roll is detected.

By JP 08-002 757 A is a tiltable pressure roller in a device known for connecting webs.

The invention has for its object to provide a device for preparing a To create a supply roll wound material web.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that in the Device for applying the tape anyway taking place rotation of the Supply roll is advantageously used to detect the radius of the supply roll. The Knowledge of the radius allows the detection of deviations of the detected radius of the Supply roll of an ideal radius, d. H. deviations of the shape of the supply roll of an ideal cylindrical shape. A reel changer, which the material web of glued to roll change prepared supply roll to a moving web, compensates for these form deviations. Thus, the tape gets on its entire Length adhered to the running web, and the splices hold the occurring tensile stresses stood. Damage to the material webs as well Production losses are avoided. Because the sensor in the device for Applying the adhesive tape to the material web of the supply roll to be loaded is installed and thereby advantageously the rotational movement of the supply roll during the Applying the adhesive tape for detecting the radius of the supply roll exploits are no additional measuring stations necessary for detecting the radius. This remains an arrangement with a device for applying the adhesive tape and a Reel changer compact and space-saving, and also the number one after the other to be performed operations for the role change is despite the additional Detecting the radius of the supply roll is not increased.

Basically, the sensor can scan the supply roll either touching or he can feel the supply roll contactless. If it is a non-contact sensing sensor, the sensor may be an optical or an acoustic sensor be.

If the device comprises a sensor which during the rotation of the Supply roll whose radius is detected along a circumference of the supply roll, so can from this flattening of the supply roll or locally depressed parts of the supply roll be recognized. However, several sensors are preferred in the width of the supply roll staggered, so that the supply roll across its width on deviations of the ideal shape can be examined and in particular a conical Deformation of the supply roll can be determined.

Also particularly preferably, the sensor is part of a sensor pair for scanning diametrically opposite sides of the supply roll. While a sensor or one-sided arranged several sensors require a full turn of the supply roll to to scan their entire circumference, is diametrically in an arrangement with it opposite sensors already half a turn of the supply roll to Capture their entire scope sufficiently.

The device may comprise an evaluation unit, which detects the detected by the sensor Radius with an ideal radius compares and a deviation between the two finds. In the presence of sensor pairs with diametrically opposite Sensors can be set up the evaluation unit, a deviation from the ideal Radius to recognize that of the sensors of the sensor pair respectively detected radii are different from each other. An ideal radius is in this case then when the sensors of the same sensor pair each detect the same radii.

In this case, the evaluation unit and a control unit, which the application of the Adhesive tape controls in the device, implemented by two separate processors be. However, it is more advantageous because it is simpler to provide a single processor both the evaluation unit and the control unit for controlling the application of the adhesive tape are implemented.

In the apparatus may further include an interface for reading and reading a Record be provided. This record may be one of the Supply roll from the manufacturer side associated data set with specific data of Supply roll as they are today in the paper industry. Such a Record is provided for each individual supply roll and accompanies the supply roll from their manufacture to their final consumption. All process steps that the Stock roll since its manufacture are noted in this record, so that the dataset allows to understand the history of the supply roll. Out For these reasons, the device is preferably set up, the detected radius in the Write record. If the device has an evaluation unit, be Likewise, the deviations found in the evaluation unit by the evaluation unit are preferred Record written. If the radii detected by the sensors of the supply roll or deviations are stored in this existing record, is it for the device in the production process subsequent roll changer especially easy to get information about the recorded radii or deviations obtained and compensate for any form deviations of the supply roll.

To compensate for variations in the supply roll of the ideal cylindrical shape, the Roll changer a frame and a pressure roller mounted therein for pressing the in Settlement running material web against the supply roll to be loaded the provided with the adhesive tape web, wherein the pressure roller to compensate for the deviations in the frame can be positioned differently. Further For example, a reel changer may include a bearing in which the supply reel to be loaded of the tape provided with the tape material is stored, and in which this Supply roll to compensate for the deviation is positioned differently.

A reel changer preferably comprises a control device that is set up, the supply roll to be replaced due to the deviation as unfit for use in the to recognize the web processing machine and the supply roll weed.

Embodiments of the invention are illustrated in the drawings and are in Described in more detail below.

Fig. 1

eine Seitenansicht einer Vorrichtung zum Aufbringen eines Klebebandes auf eine zu einer Vorratsrolle gewickelten Materialbahn;

Fig. 2

eine Vorderansicht der Vorrichtung aus Fig. 1;

Fig. 3

eine vereinfachte Seitenansicht eines Teils eines Rollenwechslers mit in Abwicklung befindlicher Vorratsrolle und einer mit Klebeband versehenen Vorratsrolle;

Fig. 4a)

den Rollenwechsler der Fig. 3 in Blickrichtung der Materialbahn mit konisch verformter Vorratsrolle;

Fig. 4b)

den Rollenwechsler aus Fig. 3 mit verstellter Andrückwalze;

Fig. 4c)

den Rollenwechsler aus Fig. 3 mit verstellter Vorratsrolle.

Show it:

Fig. 1

a side view of an apparatus for applying an adhesive tape on a wound to a supply roll material web;

Fig. 2

a front view of the device of Fig. 1;

Fig. 3

a simplified side view of a portion of a roll changer with befindlicher supply roll and an adhesive provided with supply roll;

Fig. 4a)

the reel changer of Figure 3 in the direction of the web with a conically deformed supply roll.

Fig. 4b)

the reel changer of Figure 3 with adjusted pressure roller.

Fig. 4c)

the reel changer of Fig. 3 with adjusted supply roll.

Fig. 1 shows a side view of a device for applying an adhesive tape a web end 14 of a supply roll 01 with a longitudinal axis sixteenth wound material web, z. B. paper web. Fig. 2 is the associated front view the device. A lifting device 02 comprises two height-adjustable, rotatably drivable Rolls 03, on which the supply roll 01 rests. The rollers 03 are preferably according to different roll diameter at different heights positioned. A movable arm 04 of the device has rollers 06 at one end Grasping the web end 14 on. The arm 04 is pivotable to the one of the Rollers 06 detected web end 14 of the web to a work table Pull so that the leading edge of the web in the work area of a cutting / adhesive tape dispensing device 08 comes to rest. The cutting / adhesive tape dispenser 08 is along a rail 07 in the longitudinal direction of Supply roll 01 slidably to an adhesive tape 17 on the leading edge of the web applied.

Sensors 09 and / or these diametrically opposed sensors 11 are at height the longitudinal axis 16 of the supply roll 01 facing the lateral surface of the Supply roll 01 arranged. As seen in particular in the front view of FIG. 2 can be, is in each case a plurality of sensors 09; 11 in the width of the supply roll 01 are each preferably arranged equidistantly on a rail 12. The sensors 09; 11 each have the same distance to a median plane between the rollers 03 and thus, when the supply roll 01 is ideally round, even from its longitudinal axis 16. Die Sensors 09; 11 are in communication with a processor 13 on which a Control unit 24 and an evaluation unit 26 are implemented. The processor 13 is with provided an interface for reading and outputting records related to each in the device processed supply roll 01 a set of characteristic for them Specify properties.

In order to provide the supply roll 01 in the device shown with an adhesive tape 17, is the web end 14 of the supply roll 01 of the rollers 06 of the arm 04 taken. The arm 04 pulls the material web end 14 to the cutting / adhesive tape dispenser 08. At the same time, the rollers 03 of the lifting device 02 rotationally driven, so that the supply roll 01 rotates about its longitudinal axis 16. Of the along the rail 07 slidable cutting / tape dispensing device 08 is the web end 14 then provided with an adhesive tape 17. The Movements of the arm 04 and the cutting / tape dispensing device 08 are controlled by the controller 12 implemented on the processor 13.

While the web end 14 from the arm 04 for cutting / adhesive tape dispensing device 08 is pulled and the supply roll 01 rotates detect the sensors 09; 11 each continuously the distance between itself and the Lateral surface of the supply roll 01. Since the distance of the sensors 09; 11 from the Middle plane is fixed, the detected distance is directly representative of the radius of the Supply roll 01. The of the sensors 09; 11 detected distance is the on the Processor 13 implemented evaluation unit 26 transmitted. After half Rotation of the supply roll 01, the evaluation unit 26 has measured values of the entire lateral surface of the supply roll 01.

Preferably, a measuring beam of the sensors 09 closes; 11 with a horizontal one Opening angle α from + 15 ° to -15 °. Particularly preferred is a measuring beam of Sensors 09; 11 arranged approximately horizontally.

The sensors 09; 11 are arranged laterally to the supply roll 01. A measuring beam of Sensors 09; 11 is preferably arranged approximately radially to the supply roll 01.

The evaluation unit 26 averages the totality of the sensors 09; 11 recorded Radii and checks if the mean value is within a target range. If this is not the case, then the supply roll 01 for use in the reel changer is not suitable and will excreted.

By comparing the radii with each other, the evaluation unit 26 is also able to determine whether the supply roll has 01 bumps, and where this on the supply roll 01 lie. If there is a bump, it checks to see if it is in a location where later the web end 14 will come to rest with the tape strip. is If so, this would hinder the flying role change; this can, however be corrected by the supply roll 01 is further unwound and through the cutting / tape dispensing device 08 is cut off so that the at Cut off newly obtained material web end 14 no longer lying on the bump comes.

When detected by two respective opposite sensors 09 and 11 Radii differ or different during the rotation of the supply roll 01 develop, this indicates a non-circular shape of the supply roll 01 out. If the Evaluation unit 26 determines that the out-of-roundness exceeds a predetermined level is the supply roll 01 unsuitable and will be sorted out.

When the radii detected by the sensors 09 and 11 of a group have a dependency from the location of the sensors 09; 11 in the width direction of the supply roll 01, so this indicates a conicity of the supply roll 01. This is also from the Evaluation unit 26 detected.

The evaluation unit 26 carries the results of the evaluation of the measured values of the sensors 09; 11 in the supply roll 01 associated record.

After evaluating the measurement results by the evaluation unit 26 and applying the Adhesive tape 17 on the material web end 14 through the cutting / adhesive tape dispensing device 08, the rollers 03 are in the opposite direction driven to the web end 14 on the body of the supply roll 01 retract and over the web end 14 projecting portion of the Adhere adhesive tape 17 to the supply roll 01. Depending on the decision by the Evaluation unit 26 on the usefulness of the supply roll 01, this becomes a automatic reel splicer conveyed or eliminated.

Fig. 3 shows a simplified representation of a part of a roll changer from the side View. From a supply roll 22 to be replaced, a moving material web, for. B. a paper web 21 unwound. The supply roll 22 is intended to be against the adhesive tape 17 provided supply roll 01 are exchanged. The supply roll 01 is below the Paper web 21 rotatably held. Above the paper web 21 at the level of the supply roll 01, a pressure roller 18 is provided. The two supply roll 01 and 22 and the Pressure roller 18 are mounted in a frame 19, which in the following Fig. 4a) to 4c) you can see.

Since the paper web 21 at considerable speed from the supply roll 22nd is unwound, the supply roll 01 from the roll changer to a first Speeds up rotational speed, at which their peripheral speed of Running speed of the paper web 21 corresponds. After the supply roll 01 the Running speed of the paper web 21 has reached, it is - by adjusting the axis the pressure roller 18 and / or the supply roll 01- pressed against the paper web 21. Due to the rotation of the paper web 01, the adhesive tape 17 comes in contact with the Paper web 21. After sticking the adhesive tape 17 to the paper web 21 is the Paper web of the supply roll 01 taken from the paper web 21 and in one of the Traced paper web 21 passed printing press.

If the supply roll 01 deviates from an ideal cylindrical shape, there is no guarantee that the adhesive tape 17 on its entire length sufficiently firmly on the paper web 21st liable.

Fig. 4a) illustrates this problem by means of a front view of the roll changer from a viewing direction parallel to the paper web 21 at a time before bonding the both paper webs. The supply roll 01 is in the Fig. 4a) to illustrate the Facts exaggerated strongly conical. How to get out of this presentation can recognize the paper web 21 from which it sticks down pressing pressure roller 18 due to the conical shape of the supply roll 01 not over their entire width are pressed against the supply roll 01. This would become one lead to poor adhesion of the adhesive tape 17 to the supply roll 21, with the Result that the bond dissolves when the web of the supply roll 01 of the running paper web 21 is entrained.

The roll changer receives along with the supply roll 01 via a suitable Interface also assigned to this supply roll record. On the basis of that It contains information about the conical shape of the supply roll 01 as shown in FIG. 4b). shown, the pressure roller 18 slightly obliquely, so that their supply roll 01 facing surface to the opposite surface of the supply roll 01 exactly is parallel, as shown in Fig. 4b). When the pressure roller 18 from this position is moved vertically downward, it presses the paper web 21 on the entire width of Supply roll 01 against this.

Alternatively, it can also be provided that the storage of the supply roll 01 within of the frame 19 allows a pivoting of the axis of the supply roll 01 such that the facing surfaces of the conical supply roll 01 and the Pressure roller 18 are parallel, as shown in Fig. 4c).

It is also possible, the sensor for determining the radius or the shape tolerances or Positional tolerances when turning the supply roll in unpacking station, in a special Station or in the reel changer itself.

LIST OF REFERENCE NUMBERS

01

supply roll

02

lifter

03

role

04

poor

05

-

06

roller

07

rail

08

Cutting / tape dispensing device

09

sensor

10

-

11

sensor

12

rail

13

processor

14

Web end

15

-

16

longitudinal axis

17

duct tape

18

pressure roller

19

frame

20

-

21

paper web

22

supply roll

23

-

24

control unit

25

-

26

evaluation

α

opening angle

Claims (21)

Apparatus for preparing a web of material for a flying reel change wound into a supply roll (01), comprising a bearing for supporting and rotating the supply roll (01) about a longitudinal axis (16), at least one sensor (09; 11) for detecting a radius of the Supply roll (01) is arranged during the rotational movement, characterized in that in the direction of the longitudinal axis (16) of the supply roll (01) a plurality of sensors (09, 11) detecting the radius are arranged. Apparatus according to claim 1, characterized in that the sensors (09; 11) are arranged in contact with the supply roll (01) in a scanning manner. Apparatus according to claim 1, characterized in that the sensors (09; 11), the supply roll (01) are arranged contactless scanning. Apparatus according to claim 3, characterized in that the sensors (09; 11) are optical or acoustic sensors (09; 11). Apparatus according to claim 1, characterized in that a measuring beam of the sensors (09; 11) with a horizontal an opening angle (α) of + 15 ° to -15 ° is arranged enclosing. Apparatus according to claim 1, characterized in that a measuring beam of the sensors (09; 11) is arranged approximately horizontally. Apparatus according to claim 1, characterized in that the sensors (09; 11) are arranged laterally to the supply roll (01). Apparatus according to claim 1, characterized in that in the direction of the longitudinal axis (16) of the supply roll (01) at least three sensors are arranged side by side spaced. Apparatus according to claim 1, characterized in that the device comprises at least one pair of diametrically opposite sides of the supply roll (01) scanning sensors (09; 11). Apparatus according to claim 1, characterized in that an evaluation unit (26) for detecting a deviation of the shape of the supply roll (01) of an ideal shape based on measurement results of the at least one sensor (09; 11) is arranged. Apparatus according to claim 10, characterized in that the evaluation unit (26) is arranged to detect an out-of-roundness of the supply roll (01) that the radius of a sensor (09, 11) detected during rotation of the supply roll (01) varies. Apparatus according to claim 9 and 10, characterized in that the evaluation unit (26) is adapted to detect an out-of-roundness of the supply roll (01) by comparing the radii detected by the sensors (09, 11) of the sensor pair. Apparatus according to claim 10, characterized in that the evaluation unit (26) is adapted to detect a conicity of the supply roll (01) by comparing the radii detected by the sensors (09, 11) of the group. Device according to one of claims 10 to 13, characterized in that the evaluation unit (26) and a control unit (24) for controlling the adhesive tape dispenser by a common processor (13) are implemented. Device according to one of the preceding claims, characterized in that an interface for reading and reading a data set is arranged. Apparatus according to claim 15, characterized in that the device is arranged to write the detected radius in the record. Device according to one of claims 15 or 16 and one of claims 10 to 13, characterized in that the device is arranged to write the deviation in the data record. Apparatus according to claim 1, characterized in that the sensors (09; 11) are arranged in a device for applying an adhesive tape (17). Apparatus according to claim 1, characterized in that the device has a longitudinal direction in the direction of the longitudinal axis (16) of the supply roll (01) movable adhesive tape dispenser. Apparatus according to claim 1, characterized in that two the supply roll (01) rotating rollers (03) are arranged. Apparatus according to claim 20, characterized in that the two rollers (03) are positioned at different heights as a function of a radius of the supply rollers (01).

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