EP0881181B1 - Unwinding station for continuously unwinding a material web - Google Patents

Unwinding station for continuously unwinding a material web Download PDF

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Publication number
EP0881181B1
EP0881181B1 EP98109493A EP98109493A EP0881181B1 EP 0881181 B1 EP0881181 B1 EP 0881181B1 EP 98109493 A EP98109493 A EP 98109493A EP 98109493 A EP98109493 A EP 98109493A EP 0881181 B1 EP0881181 B1 EP 0881181B1
Authority
EP
European Patent Office
Prior art keywords
unwind
station according
adhesive
unwinding
unwind station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98109493A
Other languages
German (de)
French (fr)
Other versions
EP0881181A3 (en
EP0881181A2 (en
Inventor
Bernd Kaufmann
Johann Grupp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0881181A2 publication Critical patent/EP0881181A2/en
Publication of EP0881181A3 publication Critical patent/EP0881181A3/en
Application granted granted Critical
Publication of EP0881181B1 publication Critical patent/EP0881181B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00Changing the web roll
    • B65H19/10Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857Support arrangement of web rolls
    • B65H19/1863Support arrangement of web rolls with translatory or arcuated movement of the roll supports
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H16/00Unwinding, paying-out webs
    • B65H16/10Arrangements for effecting positive rotation of web roll
    • B65H16/103Arrangements for effecting positive rotation of web roll in which power is applied to web-roll spindle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00Changing the web roll
    • B65H19/10Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1805Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/181Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll
    • B65H19/1821Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll the replacement web being accelerated or running prior to splicing contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/41Winding, unwinding
    • B65H2301/413Supporting web roll
    • B65H2301/4136Mounting arrangements not otherwise provided for
    • B65H2301/41361Mounting arrangements not otherwise provided for sequentially used roll supports for the same web roll
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/41Winding, unwinding
    • B65H2301/417Handling or changing web rolls
    • B65H2301/4171Handling web roll
    • B65H2301/4173Handling web roll by central portion, e.g. gripping central portion
    • B65H2301/41734Handling web roll by central portion, e.g. gripping central portion involving rail

Definitions

  • the invention relates to a unwind station for the continuous unwinding of a material web, in particular paper or cardboard web, according to the preamble of claim 1 (DE-A-1 574 632).
  • Unwind stations of the type mentioned here serve for the continuous unwinding of a material web from a winding roll and are arranged upstream of a machine for processing the material web, for example a coating machine.
  • a known unwinding station comprises a primary and a secondary unrolling device, which are used to guide a winding roll.
  • a full winding roll is first guided by the primary unwinding device during the unwinding of the material web. From a desired diameter of the winding roll, this is transferred from the primary to the secondary unwinding device.
  • swivel arms are used which can be swiveled around an axis and which engage on both sides of the winding roll and transfer them to the secondary unwinding device by means of a swivel movement.
  • a new, full winding roll is then fed to the primary unwinding device and the material web wound thereon is connected to the material web running off the secondary unwinding device before it is completely unwound.
  • Adhesive device which has an adhesive roller which can be pivoted about an axis, via which the material web running from the secondary unwinding device is guided to the material web processing machine which is seen in the direction of travel of the material web.
  • the adhesive roller is pivoted and pressed onto the winding roller guided by the primary unwinding device.
  • the material web running off the secondary unwinding device is cut off by means of a cutting device.
  • the known unwinding station has the particular disadvantage that, due to the great weight of the winding roll, which can be up to 40 tonnes when the primary unwinding device is transferred to the primary unwinding device, very large forces have to be applied in order to pivot this load. This requires several separate hydraulic cylinders that pivot the very complex and sturdy swivel arms.
  • a further disadvantage is that due to the large space requirement of the swivel constructions used to transfer the winding roll or to move the adhesive device, the dimensions of the unwinding station, that is to say its height and length, are relatively large. The cost of the unwind station is high, particularly due to the swivel construction.
  • DE-A-1 250 709 discloses a roll-off station which has two drives which can be coupled to the winding rolls by means of a cardan shaft or a belt drive.
  • a roll-off station which has the features mentioned in claim 1.
  • This is characterized by an auxiliary drive, with the aid of which torque can be applied to the winding roll during the transfer from the primary unrolling device to the secondary unrolling device.
  • the auxiliary drive which can be displaced together with the winding roll, the unwinding pull of the material web running off the winding roll, in particular during the transfer of the winding roll, can be kept or adjusted to a desired value.
  • the glue point between the two material webs can be guided safely through the processing machine downstream of the unwinding station.
  • An embodiment of the unwinding station is particularly preferred, which is characterized in that the winding roll can be displaced along a first straight line which preferably runs parallel to an imaginary horizontal.
  • a complex swivel arm construction and hydraulic cylinders effecting the swiveling movement, such as are used in the known unwind station, can therefore be dispensed with, so that the construction of the unwind station can be simplified and its overall height and / or length can be reduced.
  • the auxiliary drive is also used when the winding roll is guided by the primary or the secondary unwinding device.
  • the primary and the secondary unwinding device are therefore arranged at the same level, that is, at the same height, so that the winding roll can be transferred with relatively small forces.
  • the horizontal arrangement of the unwinding stations can in particular the construction of the guide device can be simplified.
  • an embodiment of the unwinding station is also preferred, which is characterized in that the adhesive device has at least one adhesive roller which can be displaced along a second straight line by means of a linear guide device. Due to this configuration, the design of the unwind station can be simplified. The small space requirement of the linear guide device is also advantageous, so that there is the possibility of reducing both the length and the height of the unwind station.
  • the unwind station described below is generally related to a machine for processing a web of material, for example Coating machine, calender, slitter or the like, can be used. It is therefore generally spoken below that the unwind station is assigned to a paper web processing machine.
  • FIG. 1 shows a highly schematic side view of a unwind station 1, which is used for the continuous unwinding of a paper web, which is generally referred to below as material web 3.
  • material webs wound up on reels are connected to one another, that is to say made endless, so that a continuous processing operation in a processing machine - not shown - downstream of the unwind station — viewed in the direction of travel of the material web — is possible.
  • the material web 3 runs from a winding reel 7 wound on a reel 5, also referred to as a secondary reel, which is guided by a secondary unrolling device 9, not shown in detail.
  • the material web 3 is guided over an adhesive roller 11 of an adhesive device 13 and from there via a stationary guide roller 15 through an opening in a foundation 17 into a basement (not shown in more detail).
  • the material web 3 is transferred from the basement to the processing machine.
  • the material web 3 is not led into the basement, but directly from the guide roller 15 to the processing machine.
  • the material web can therefore also be guided to the processing machine above the foundation 17.
  • the unwind station 1 further comprises a primary unwind device 19, not shown, the construction of which in this embodiment with which the secondary unrolling device 9 corresponds.
  • a winding roll 23 wound onto a drum 21, also referred to as a primary winding, is guided by the primary unrolling device 19.
  • the structure of the unrolling devices is discussed in more detail with reference to FIGS. 3 and 4.
  • the primary unrolling device 19 and the secondary unrolling device 9 are connected to one another via a guide device 25, which comprises two parallel running rails, of which only the running rail 27 can be seen in the side view of the unwinding station 1.
  • the guide device 25 is mounted on a frame 29 fastened to the foundation 17.
  • transport slides also referred to as secondary slides, of which only the transport sled 32 is shown in a highly schematic manner in FIG.
  • the transport slides are driven by spindles (not shown), with the aid of which precise positioning of the transport slides and thus of the winding roll is possible.
  • the center points 33 and 35 of the winding rolls 23, 7 lie on an imaginary first straight line G1, shown in dashed lines, which in this exemplary embodiment runs parallel to an imaginary horizontal, that is to say is aligned horizontally.
  • the function of the unwind station 1 will be discussed in more detail with reference to FIG. 2.
  • winding rolls are fed to the unwinding station 1 by means of a feed device 37 which comprises a transport carriage 39 which can be moved on the rails 38 laid on the foundation 17.
  • the rails 38 extend into the image plane of FIG. 1, that is to say that the transport carriage 39 can be moved transversely to the longitudinal extent of the unwinding station 1.
  • the transport carriage 39 has a base frame 41 on which guide rails 43 are attached, on which bearing journals 31 of a reel 45 are supported.
  • a winding roll 47 is wound on the reel 45 and can have a diameter of, for example, 3,500 mm and above. Of course, the diameter of the winding roll 47 can also be less than 3,500 mm.
  • the guide rails 43 of the transport carriage 39 are at the same height as the running rails 27 of the guide device 25, so that the center 49 of the winding roller 47 is also arranged on the first straight line G1.
  • the winding roll 23 guided by the primary unrolling device 19 must be transferred to the secondary unrolling device 9, which will be discussed in more detail below.
  • a unwound winding roll can be brought out of the unwinding station 1 by means of a lifting device, not shown.
  • the unwound winding roll 7 is shown in dashed lines in a position outside the unwind station 1.
  • FIG. 2 schematically shows part of the unwind station 1 according to FIG. 1 on an enlarged scale, namely the winding rollers 23, 7 and the adhesive device 13.
  • the same parts are provided with the same reference numerals, so that reference can be made to the description of FIG. 1.
  • the adhesive device 13 of the unwinding station 1 comprises an adhesive carriage 51 which holds the adhesive roller 11. This can consist of metal, in particular steel, or a carbon fiber reinforced plastic (CFRP adhesive roller) and can have a diameter of 850 mm, for example.
  • the adhesive roller 11 can be displaced relative to the adhesive carriage 51 by means of a displacement device (not shown).
  • the displacement device can be designed, for example, as a swivel device.
  • a linear guide device 53 is assigned to the adhesive carriage 51, which has two linear guides 55, of which only the linear guide attached to a support bar 54 can be seen in FIG. Furthermore, the linear guide device 53 comprises a pair of linear carriages 57, that is to say two linear carriages 57, each arranged on one side of the adhesive carriage 51 and connected to the latter via a plurality of bearings 59, here a total of three.
  • a drive device 61 is assigned to the adhesive carriage 51, which in this exemplary embodiment is designed as a piston and cylinder unit, which comprises a cylinder 63 pivotably mounted on the foundation 17 and a piston rod 65 guided therein.
  • a cutting device 69 is attached to the adhesive carriage 51, which is preferably provided with teeth Tee knife 71 has.
  • This can be displaced relative to the adhesive carriage 51 by means of a displacement device (not shown in FIG. 2) arranged on the adhesive carriage 51.
  • the displacement device can be designed as a swivel device so that the knock-off knife 71 can be swiveled with respect to the adhesive carriage.
  • the fulcrum of the adhesive roller 11 attached to the adhesive carriage 51, to which a rotary drive can be assigned lies exactly vertically below the center of gravity of the adhesive roller 11.
  • the center 67 of the adhesive roller 11 lies on an imaginary second straight line G2, shown in broken lines, which here intersects the center 33 of the winding roller 23 guided by the primary unwinding device 19.
  • the second straight line G2 is inclined relative to the foundation by an angle ⁇ , which here is approximately 40 °.
  • the second straight line G2 can also be inclined relative to the foundation by an angle ⁇ which is greater or less than 40 °, that is to say the slope of the second straight line G2 can be varied.
  • a guide roller 73 interacts with the adhesive device 13 and, prior to the connection of the material webs wound on the winding rollers 7 and 23, can be displaced into the material web which runs between the winding roller 7 and the adhesive roller 11 in a free train and runs off the winding roller 7.
  • the guide roller 73 formed by at least one roller or a tubular shaft, preferably a plurality of rollers or tubular shafts, can be inserted into the be pivoted in Figure 2 with the dashed line position. It is also possible that the guide roller 73 is also transferred along a straight line.
  • a drive can be assigned to the guide roller 73 so that the material web tension can be adjusted.
  • the cutting device 69 is arranged downstream of the guide roller 73, as seen in the direction of travel of the material web, that is to say the cutting device 69 is arranged in the region between the adhesive nip formed by the adhesive roller 11 and the winding roller 23 and the guide roller 73.
  • so-called scraper deflectors which remove or keep away web scraps torn from the material web when the material web is separated from it, are stationary in the basement.
  • the guide roller 73 is preferably attached to the adhesive carriage 51 such that it can rotate, so that overall a compact unit comprising the adhesive roller 11, the cutting device 69 and the guide roller 73 is formed. In another embodiment it is provided that the guide roller 73 is guided such that it can be displaced relative to the adhesive carriage 51.
  • the outer layer of the winding roll 23 is fastened to the layer below, usually by gluing with a special adhesive tape.
  • the adhesive tape is designed in such a way that free adhesive points remain on the outer surface of the winding roll 23, to which during the gluing process that of the secondary unrolling device 9 guided winding roll 7 running material web is attached by means of the adhesive roller 11.
  • the connection of the material webs during the operation of the unwind station 1 at a running speed of the material web of up to 2000 m / min and above is also referred to as a "flying splice". This designation is chosen whenever the connection of material webs takes place while they are moving.
  • the material web 3 runs - as shown in FIG. 2 - from the winding roll 7 guided by the secondary unrolling device 9 and is fixed with the foundation via the gluing roll 11 17 connected guide roller 15 led to the processing machine.
  • the guide roller 73 is pivoted into the free train between the winding roller 7 and the adhesive roller 11 guided material web 3. The material web 3 is thereby deflected.
  • the drive device 61 assigned to the adhesive carriage 51 is actuated, whereupon its piston rod 65 extends out of the cylinder 63.
  • the adhesive carriage 51 is articulated and moved by means of the linear guide device 53 directly to the winding roll 23 guided by the primary unrolling device 19.
  • this has been accelerated by a drive in such a way that its peripheral speed essentially corresponds to the speed of the material web 3 running off the winding roll 7.
  • a control electronics not shown, recognizes where the prepared glue point is on the circumference of the winding roll 23 is located.
  • the gluing roller 11 is pressed very quickly against the winding roller 23 by means of the displacement device, not shown, depending on the rotation of the gluing point, the knock-off knife 71 of the cutting device 69 in the transition area between the Guide roller 73 and the adhesive roller 11 moves against the material web 3, so that it is cut, preferably over the entire width. So that the end of the material web 3 unwound from the winding roll 7 does not get into the adhesive nip between the adhesive roller 11 and the winding roller 23, blowing devices (not shown) are provided which keep the material web end away from the adhesive nip.
  • the severed end of the material web 3 is glued in the adhesive nip to the material web wound on the winding roll 23.
  • the adhesive effect of the adhesive points located on the outside of the winding roller 23 is greater than that of the adhesive points which connect the outer layer to the layer below. As a result, the material web wound on the winding roll 23 is released and unwound by the unwinding train.
  • gluing carriage 51 and guide roller 73 are moved back or swiveled into their starting positions.
  • the drum 5 guided by the secondary unrolling device 9, on which there is still a remainder of the winding roll 7, is - as indicated in FIG. 1 - brought out of the unwinding station 1, for example by means of a lifting device.
  • the winding roll 23, which has been guided by the primary unrolling device 19, is then used the guide device 25 (not shown in FIG. 2) and the transport carriage 32 are transferred to the secondary unrolling device 9 along the first straight line G1.
  • the displacement of the adhesive roller 11 along the second straight line G2 ensures that the adhesive nip formed between the adhesive roller 11 and the winding roller 23 is always on the second straight line G2, regardless of the diameter of the winding roller 23.
  • the adhesive roller 11 can be pressed evenly against the winding roller 23, so that preferably constant line forces can be set in the adhesive nip. This enables a particularly high level of functional reliability of the adhesive device 13 and thus of the unwinding station 1 to be ensured.
  • the winding roll 23 is shown with different diameters.
  • the largest diameter of the winding roll shown with a solid line can be, for example, 3,500 mm.
  • the adhesive roller 11 is shown in dashed lines in a position in which it forms an adhesive nip with a winding roller 23 'which has a diameter of, for example, 2,200 mm.
  • the winding roll 23 is shown with a dashed line 75 in a position already in the material web has been developed so far that the diameter is, for example, approximately 1,900 mm.
  • this diameter of the winding roll 23 guided by the primary unrolling device 19 the winding roll 23 is transferred to the secondary unrolling device 9 along the first straight line G1.
  • the diameter specifications and the ratios derived therefrom are only to be understood as examples.
  • FIG. 3 shows a highly schematic plan view of an embodiment of the unwind station 1. Parts that correspond to those described with reference to Figures 1 and 2 are provided with the same reference numerals, so that reference is made to the description of Figures 1 and 2.
  • a winding roll 77 is guided by the primary unrolling device 19.
  • the winding roll 77 is connected to a stationary drive 79 of the primary unrolling device 19 via the right journal 31.
  • a "stationary" arrangement is understood to mean a fixed, unchangeable position.
  • the drive 79 attached to a base standing on the foundation 17 (see FIG.
  • the primary unwinding device 19 also has a brake generator, by means of which the winding roller 77 can be braked.
  • the brake generator for example an electric motor, can also be attached to a fixed base. If an electric motor is used as the brake generator, it can also be operated as a motor, depending on the operating situation, for example when starting the unwind station or while the winding station is in operation, that is to say while the winding roll is being guided by the primary unwinding device 19.
  • the left bearing pin 31 of the winding roller 77 is coupled to an auxiliary drive 81 which is guided on a running rail 83.
  • the running rail 83 is aligned parallel to the running rails 27 and 27 'of the guide device 25, that is to say the auxiliary drive 81 can be moved parallel to the straight line G1.
  • the task of the auxiliary drive 81 is to maintain or adjust the unwinding of the material web running off the winding roll 77 to a desired value during the transfer of the winding roll 77 from the primary unrolling device 19 to the secondary unrolling device 9 along the straight line G1.
  • the auxiliary drive 81 is coupled to at least one of the transport (secondary) slides 32 (not shown in FIG. 3) and is transferred together with the winding roll 77 to the secondary unrolling device 9. As described above, the transport carriage is driven by means of at least one spindle.
  • the secondary unrolling device 9 likewise comprises a stationary drive 85 and a brake generator (not shown), for example attached to a fixed base.
  • the drives 79 and 85 preferably have an identical structure.
  • the stationary drives 79 and 85 are arranged on the drive side of the unwind station 1. Accordingly, the auxiliary drive 81 is arranged on the operator side of the unwind station.
  • the auxiliary drive 81 is coupled to the winding roll 77, while the connection of the winding roll 77 to the drive 79 of the primary unrolling device 19 is interrupted.
  • the winding roll is driven by the auxiliary drive 81 guided on the running rail 83 until it is coupled to the drive 85 of the secondary unrolling device 9 and driven by the latter.
  • the auxiliary drive 81 it is possible for the auxiliary drive 81 to remain coupled to the winding roller 77 guided by the secondary unwinding device 9 and driven or braked by its drive 85 and to contribute to the braking of the winding roller 77 by reversing the mode of operation.
  • the auxiliary drive 81 Due to the interaction of the auxiliary drive 81 with the drives 79, 85 of the primary or secondary unwinding device, the fluctuations in the material web tension can be kept very small. As a result, the glue point between two material webs, the so-called splice, can be guided safely through the processing machine downstream of the unwinding station.
  • auxiliary drive 81 can also be used when the winding roll 77 is guided either by the primary unrolling device 19 or by the secondary unrolling device 9 and is driven or braked by the drive 79, 85 of the respective unwinding station.
  • two auxiliary drives that can be moved parallel to the first straight line G1 are provided. This makes it possible to dispense with the stationary drives 79, 85 described with reference to FIG. 3.
  • the auxiliary drives which can be arranged on opposite sides of the unwind station can be used in such a way that a full winding roll is driven or braked exclusively by one of the two auxiliary drives during the entire unwinding process.
  • the winding roll can thus be driven or braked by the auxiliary drive while being guided by the primary unrolling device 19, transferred from the primary to the secondary unrolling device and while being guided by the secondary unrolling device.
  • a roll-off station having two movable auxiliary drives has a simpler structure than the roll-off station described with reference to FIG. 3, since it requires a total of three drives, two stationary and one auxiliary drive.
  • FIG. 4 shows a cross section through the unwinding station 1 according to FIG. 3.
  • the drive 79 is arranged on a base 87 standing on the foundation 17, for example a concrete base.
  • the running rail 83 on which the auxiliary drive 81 or a beam 89 connected to it is guided, is also fastened to the foundation 17.
  • the bar 89 in this embodiment has an angled course and is therefore also referred to as a "surfer" due to its contour.
  • the bar has a straight course, with which a vibration-sensitive and stable attachment of the auxiliary drive 81 is also possible.

Abstract

The machine has a primary and secondary reeling off mechanisms 19,9 and an adhesive applicator connecting two webs of material each running off one of the winder reels. After the webs of material have been joined, the winder reel conducted by the primary reeling off mechanism (19) is transferred to the secondary reeling off mechanism (9) by means of a guide piece (25) comprising at least two parallel rails (27,27'). A joint auxiliary drive mechanism (81) is moved together with the winder reel and driven by it. The winder reel is moved along a first straight line (G1) running preferably parallel with an imaginary horizontal line. The adhesive applicator has at least one adhesive roller moved along a second straight line by means of a linear guide.

Description

Die Erfindung betrifft eine Abrollstation zum kontinuierlichen Abwickeln einer Materialbahn, insbesondere Papier- oder Kartonbahn, gemäß Oberbegriff des Anspruchs 1 (DE-A- 1 574 632).The invention relates to a unwind station for the continuous unwinding of a material web, in particular paper or cardboard web, according to the preamble of claim 1 (DE-A-1 574 632).

Abrollstationen der hier angesprochenen Art sind bekannt. Sie dienen zum kontinuierlichen Abwickeln einer Materialbahn von einer Wickelrolle und werden einer Maschine zur Bearbeitung der Materialbahn, beispielsweise einer Streichmaschine, vorgeordnet. Eine bekannte Abrollstation umfaßt eine Primär- und eine Sekundär-Abrolleinrichtung, die zum Führen einer Wickelrolle dienen. Eine volle Wickelrolle wird zunächst von der Primär-Abrolleinrichtung während des Abwickelns der Materialbahn geführt. Ab einem gewünschten Durchmesser der Wickelrolle wird diese von der Primär- zu der Sekundär-Abrolleinrichtung überführt. Hierzu werden um eine Achse schwenkbare Schwenkarme eingesetzt, die auf beiden Seiten der Wickelrolle angreifen und diese mittels einer Schwenkbewegung an die Sekundär-Abrolleinrichtung überführen. Anschließend wird der Primär-Abrolleinrichtung eine neue, volle Wickelrolle zugeführt und die darauf aufgewickelte Materialbahn mit der von der Sekundär-Abrolleinrichtung geführten Wickelrolle ablaufenden Materialbahn verbunden, bevor diese vollständig abgewickelt ist. Hierfür ist eine Klebevorrichtung vorgesehen, die eine um eine Achse schwenkbare Klebewalze aufweist, über die die von der Sekundär-Abrolleinrichtung geführten Wickelrolle ablaufende Materialbahn zu der -in Laufrichtung der Materialbahn gesehen- nachfolgenden Materialbahn-Bearbeitungsmaschine geführt wird. Zum Verbinden der beiden Materialbahnen miteinander wird die Klebewalze verschwenkt und an die von der Primär-Abrolleinrichtung geführte Wickelrolle gepreßt. Gleichzeitig wird die von der Sekundär-Abrolleinrichtung geführten Wickelrolle ablaufende Materialbahn mittels einer Schneideinrichtung abgetrennt.Unwind stations of the type mentioned here are known. They serve for the continuous unwinding of a material web from a winding roll and are arranged upstream of a machine for processing the material web, for example a coating machine. A known unwinding station comprises a primary and a secondary unrolling device, which are used to guide a winding roll. A full winding roll is first guided by the primary unwinding device during the unwinding of the material web. From a desired diameter of the winding roll, this is transferred from the primary to the secondary unwinding device. For this purpose, swivel arms are used which can be swiveled around an axis and which engage on both sides of the winding roll and transfer them to the secondary unwinding device by means of a swivel movement. A new, full winding roll is then fed to the primary unwinding device and the material web wound thereon is connected to the material web running off the secondary unwinding device before it is completely unwound. For this is one Adhesive device is provided which has an adhesive roller which can be pivoted about an axis, via which the material web running from the secondary unwinding device is guided to the material web processing machine which is seen in the direction of travel of the material web. To connect the two material webs to one another, the adhesive roller is pivoted and pressed onto the winding roller guided by the primary unwinding device. At the same time, the material web running off the secondary unwinding device is cut off by means of a cutting device.

Die bekannte Abrollstation weist insbesondere den Nachteil auf, daß aufgrund des großen Gewichts der Wickelrolle, das bei der Übergabe von der Primäran die Sekundär-Abrolleinrichtung bis zu 40 Tonnen betragen kann, sehr große Kräfte aufgebracht werden müssen, um diese Last zu verschwenken. Hierzu sind mehrere separate Hydraulikzylinder notwendig, die die sehr aufwendig und stabil konstruierten Schwenkarme verschwenken. Nachteilig ist weiterhin, daß aufgrund des großen Platzbedarfs der zur Überführung der Wickelrolle beziehungsweise zum Verlagern der Klebevorrichtung dienenden Schwenkkonstruktionen die Maße der Abrollstation, also deren Höhenund Längserstreckung, relativ groß sind. Die Kosten der Abrollstation sind insbesondere aufgrund der Schwenkkonstruktionen hoch.The known unwinding station has the particular disadvantage that, due to the great weight of the winding roll, which can be up to 40 tonnes when the primary unwinding device is transferred to the primary unwinding device, very large forces have to be applied in order to pivot this load. This requires several separate hydraulic cylinders that pivot the very complex and sturdy swivel arms. A further disadvantage is that due to the large space requirement of the swivel constructions used to transfer the winding roll or to move the adhesive device, the dimensions of the unwinding station, that is to say its height and length, are relatively large. The cost of the unwind station is high, particularly due to the swivel construction.

Die DE-A-1 250 709 offen bart eine Abrollstation, die zwei Antriebe aufweist, die über eine Kardanwelle, beziehungsweise einen Riementrieb mit dass Wickelrollen koppelbar sind.DE-A-1 250 709 discloses a roll-off station which has two drives which can be coupled to the winding rolls by means of a cardan shaft or a belt drive.

Es ist daher Aufgabe der Erfindung, eine Abrollstation zu schaffen, die einen einfachen und kompakten Aufbau aufweist sowie funktionssicher einsetzbar ist.It is therefore an object of the invention to provide a roll-off station which has a simple and compact structure and can be used in a functionally reliable manner.

Zur Lösung dieser Aufgabe wird eine Abrollstation vorgeschlagen, die die in Anspruch 1 genannten Merkmale aufweist. Diese zeichnet sich durch einen Hilfsantrieb aus, mit dessen Hilfe die Wickelrolle während der Überführung von der Primär-Abrolleinrichtung an die Sekundär-Abrolleinrichtung mit einem Drehmoment beaufschlagbar ist. Durch den gemeinsam mit der Wickelrolle verlagerbaren Hilfsantrieb kann der Abrollzug der von der Wickelrolle ablaufenden Materialbahn, insbesondere während der Überführung der Wickelrolle, auf einem gewünschten Wert gehalten beziehungsweise eingestellt werden. Hierdurch kann die Klebestelle zwischen den zwei Materialbahnen sicher durch die der Abrollstation nachgeordneten Verarbeitungsmaschine geführt werden.To solve this problem, a roll-off station is proposed which has the features mentioned in claim 1. This is characterized by an auxiliary drive, with the aid of which torque can be applied to the winding roll during the transfer from the primary unrolling device to the secondary unrolling device. By means of the auxiliary drive which can be displaced together with the winding roll, the unwinding pull of the material web running off the winding roll, in particular during the transfer of the winding roll, can be kept or adjusted to a desired value. As a result, the glue point between the two material webs can be guided safely through the processing machine downstream of the unwinding station.

Besonders bevorzugt wird ein Ausführungsbeispiel der Abrollstation, das sich dadurch auszeichnet, daß die Wickelrolle entlang einer vorzugsweise parallel zu einer gedachten Horizontalen verlaufenden ersten Geraden verlagerbar ist. Auf eine aufwendige Schwenkarmkonstruktion und auf die Schwenkbewegung bewirkende Hydraulikzylinder, wie sie bei der bekannten Abrollstation eingesetzt werden, kann also verzichtet werden, so daß der Aufbau der Abrollstation vereinfacht und deren Bauhöhe und/oder - länge verringert werden können. Es ist weiterhin möglich, daß der Hilfsantieb auch dann eingesetzt wird, wenn die Wickelrolle von der Primär- oder der Sekundär-Abrolleinrichtung geführt wird. Die Primär- und die Sekundär-Abrolleinrichtung sind also auf gleichem Niveau, das heißt auf gleicher Höhe angeordnet, so daß die Überführung der Wickelrolle mit relativ kleinen Kräften möglich ist. Durch die waagerechte Anordnung der Abrollstationen kann insbesondere die Konstruktion der Führungseinrichtung vereinfacht werden.An embodiment of the unwinding station is particularly preferred, which is characterized in that the winding roll can be displaced along a first straight line which preferably runs parallel to an imaginary horizontal. A complex swivel arm construction and hydraulic cylinders effecting the swiveling movement, such as are used in the known unwind station, can therefore be dispensed with, so that the construction of the unwind station can be simplified and its overall height and / or length can be reduced. It is also possible that the auxiliary drive is also used when the winding roll is guided by the primary or the secondary unwinding device. The primary and the secondary unwinding device are therefore arranged at the same level, that is, at the same height, so that the winding roll can be transferred with relatively small forces. The horizontal arrangement of the unwinding stations can in particular the construction of the guide device can be simplified.

Schließlich wird auch ein Ausführungsbeispiel der Abrollstation bevorzugt, das sich dadurch auszeichnet, daß die Klebevorrichtung mindestens eine Klebewalze aufweist, die mittels einer Linearführungseinrichtung entlang einer zweiten Geraden verlagerbar ist. Aufgrund dieser Ausgestaltung kann der konstruktive Aufbau der Abrollstation vereinfacht werden. Vorteilhaft ist weiterhin der geringe Platzbedarf der Linearführungseinrichtung, so daß die Möglichkeit besteht, sowohl die Länge als auch die Höhe der Abrollstation zu reduzieren.Finally, an embodiment of the unwinding station is also preferred, which is characterized in that the adhesive device has at least one adhesive roller which can be displaced along a second straight line by means of a linear guide device. Due to this configuration, the design of the unwind station can be simplified. The small space requirement of the linear guide device is also advantageous, so that there is the possibility of reducing both the length and the height of the unwind station.

Weitere Ausführungsformen ergeben sich aus den übrigen Unteransprüchen.Further embodiments result from the remaining subclaims.

Im folgenden wird die Erfindung anhand der Zeichnung näher erläutert. Es zeigen:

Figur 1
eine schematische Seitenansicht eines Ausführungsbeispiels einer Abrollstation;
Figur 2
einen Ausschnitt der Abrollstation gemäß Figur 1 im vergrößerten Maßstab;
Figur 3
eine Draufsicht auf ein Ausführungsbeispiel einer Abrollstation und
Figur 4
einen Querschnitt durch die Abrollstation gemäß Figur 3.
The invention is explained in more detail below with reference to the drawing. Show it:
Figure 1
is a schematic side view of an embodiment of a rolling station;
Figure 2
a section of the unwind station according to Figure 1 on an enlarged scale;
Figure 3
a plan view of an embodiment of a rolling station and
Figure 4
3 shows a cross section through the unwind station according to FIG. 3.

Die im folgenden beschriebene Abrollstation ist allgemein im Zusammenhang mit einer Maschine zur Bearbeitung einer Materialbahn, zum Beispiel Streichmaschine, Kalander, Rollenschneidmaschine oder dergleichen, einsetzbar. Es wird daher im folgenden ganz allgemein davon gesprochen, daß die Abrollstation einer Papierbahn-Verarbeitungsmaschine zugeordnet ist.The unwind station described below is generally related to a machine for processing a web of material, for example Coating machine, calender, slitter or the like, can be used. It is therefore generally spoken below that the unwind station is assigned to a paper web processing machine.

Figur 1 zeigt stark schematisiert eine Seitenansicht einer Abrollstation 1, die zum kontinuierlichen Abwickeln einer im folgenden allgemein als Materialbahn 3 bezeichneten Papierbahn dient. In der Abrollstation 1 werden auf Tamboure zu Wickelrollen aufgewickelte Materialbahnen miteinander verbunden, also endlos gemacht, so daß ein kontinuierlicher Verarbeitungsbetrieb in einer der Abrollstation -in Laufrichtung der Materialbahn gesehen- nachgeordneten -nicht dargestellten- Verarbeitungsmaschine, möglich ist. In der in Figur 1 dargestellten Funktionsstellung der Abrollstation 1 läuft die Materialbahn 3 von einer auf einem Tambour 5 aufgewickelten, auch als Sekundärwickel bezeichneten Wickelrolle 7 ab, die von einer nicht näher dargestellten Sekundär-Abrolleinrichtung 9 geführt wird. Die Materialbahn 3 wird über eine Klebewalze 11 einer Klebevorrichtung 13 und von dieser über eine ortsfeste Leitwalze 15 durch eine Öffnung in einem Fundament 17 in einen nicht näher dargestellten Keller geführt. Vom Keller aus wird die Materialbahn 3 an die Verarbeitungsmaschine überführt. Bei einem anderen Ausführungsbeispiel ist vorgesehen, daß die Materialbahn 3 nicht in den Keller, sondern direkt von der Leitwalze 15 an die Verarbeitungsmaschine geführt wird. Die Materialbahn kann also auch oberhalb des Fundaments 17 an die Verarbeitungsmaschine geführt werden. Die Abrollstation 1 umfaßt weiterhin eine nicht dargestellte Primär-Abrolleinrichtung 19, deren Aufbau bei diesem Ausführungsbeispiel mit dem der Sekundär-Abrolleinrichtung 9 übereinstimmt. Eine auf einen Tambour 21 aufgewikkelte, auch als Primärwickel bezeichnete Wickelrolle 23 wird von der Primär-Abrolleinrichtung 19 geführt. Auf den Aufbau der Abrolleinrichtungen wird anhand der Figuren 3 und 4 näher eingegangen.FIG. 1 shows a highly schematic side view of a unwind station 1, which is used for the continuous unwinding of a paper web, which is generally referred to below as material web 3. In the unwind station 1, material webs wound up on reels are connected to one another, that is to say made endless, so that a continuous processing operation in a processing machine - not shown - downstream of the unwind station — viewed in the direction of travel of the material web — is possible. In the functional position of the unwinding station 1 shown in FIG. 1, the material web 3 runs from a winding reel 7 wound on a reel 5, also referred to as a secondary reel, which is guided by a secondary unrolling device 9, not shown in detail. The material web 3 is guided over an adhesive roller 11 of an adhesive device 13 and from there via a stationary guide roller 15 through an opening in a foundation 17 into a basement (not shown in more detail). The material web 3 is transferred from the basement to the processing machine. In another embodiment it is provided that the material web 3 is not led into the basement, but directly from the guide roller 15 to the processing machine. The material web can therefore also be guided to the processing machine above the foundation 17. The unwind station 1 further comprises a primary unwind device 19, not shown, the construction of which in this embodiment with which the secondary unrolling device 9 corresponds. A winding roll 23 wound onto a drum 21, also referred to as a primary winding, is guided by the primary unrolling device 19. The structure of the unrolling devices is discussed in more detail with reference to FIGS. 3 and 4.

Die Primär-Abrolleinrichtung 19 und die Sekundär-Abrolleinrichtung 9 sind über eine Führungseinrichtung 25 miteinander verbunden, die zwei parallel zueinander verlaufende Laufschienen umfaßt, von denen in der Seitenansicht der Abrollstation 1 lediglich die Laufschiene 27 zu erkennen ist. Die Führungseinrichtung 25 ist auf einem am Fundament 17 befestigten Gestell 29 angebracht. Auf den Laufschienen der Führungseinrichtung 25 werden die an ihren Enden mit Lagerzapfen 31 versehenen Tamboure 5, 21 von auch als Sekundärschlitten bezeichneten Transportschlitten geführt, von denen in Figur 1 lediglich der Transportschlitten 32 stark schematisiert dargestellt ist. Die Transportschlitten werden von -nicht dargestellten- Spindeln angetrieben, mit deren Hilfe eine präzise Positionierung der Transportschlitten und somit der Wickelrolle möglich ist.The primary unrolling device 19 and the secondary unrolling device 9 are connected to one another via a guide device 25, which comprises two parallel running rails, of which only the running rail 27 can be seen in the side view of the unwinding station 1. The guide device 25 is mounted on a frame 29 fastened to the foundation 17. On the running rails of the guide device 25, the drums 5, 21 provided at their ends with bearing pins 31 are guided by transport slides, also referred to as secondary slides, of which only the transport sled 32 is shown in a highly schematic manner in FIG. The transport slides are driven by spindles (not shown), with the aid of which precise positioning of the transport slides and thus of the winding roll is possible.

Wie aus Figur 1 ersichtlich, liegen die Mittelpunkte 33 und 35 der Wickelrollen 23, 7 auf einer gedachten -gestrichelt dargestellten- ersten Geraden G1, die bei diesem Ausführungsbeispiel parallel zu einer gedachten Horizontalen verläuft, also waagerecht ausgerichtet ist. Auf die Funktion der Abrollstation 1 wird anhand der Figur 2 noch näher eingegangen.As can be seen from FIG. 1, the center points 33 and 35 of the winding rolls 23, 7 lie on an imaginary first straight line G1, shown in dashed lines, which in this exemplary embodiment runs parallel to an imaginary horizontal, that is to say is aligned horizontally. The function of the unwind station 1 will be discussed in more detail with reference to FIG. 2.

Die Zuführung neuer, das heißt voller Wickelrollen an die Abrollstation 1 erfolgt mittels einer Zuführeinrichtung 37, die einen auf dem Fundament 17 verlegten Schienen 38 verfahrbaren Transportwagen 39 umfaßt. Die Schienen 38 erstrecken sich in die Bildebene der Figur 1, das heißt, der Transportwagen 39 ist quer zur Längserstreckung der Abrollstation 1 verfahrbar. Der Transportwagen 39 weist ein Grundgestell 41 auf, an dem Führungsschienen 43 angebracht sind, auf denen Lagerzapfen 31 eines Tambours 45 gestützt werden. Auf dem Tambour 45 ist eine Wickelrolle 47 aufgewickelt, die einen Durchmesser von beispielsweise 3.500 mm und darüber aufweisen kann. Selbstverständlich kann der Durchmesser der Wickelrolle 47 auch weniger als 3.500 mm betragen. Die Führungsschienen 43 des Transportwagens 39 liegen auf gleicher Höhe wie die Laufschienen 27 der Führungseinrichtung 25, so daß also der Mittelpunkt 49 der Wickelrolle 47 auch auf der ersten Geraden G1 angeordnet ist. Dadurch ergibt sich insbesondere der Vorteil, daß eine mittels der Zuführeinrichtung 37 an die Abrollstation transportierte Wickelrolle bei der Übergabe an die Abrollstation 1 lediglich über die Führungsschienen 43 des Transportwagens 39 abgerollt werden muß, um auf die Laufschienen 27 der Führungseinrichtung 25 transportiert zu werden. Zunächst muß jedoch die von der Primär-Abrolleinrichtung 19 geführte Wikkelrolle 23 an die Sekundär-Abrolleinrichtung 9 überführt werden, worauf im folgenden noch näher eingegangen wird. Das Ausbringen einer abgewickelten Wickelrolle aus der Abrollstation 1 kann mittels einer nicht dargestellten Aushebevorrichtung erfolgen. In Figur 1 ist die abgewickelte Wickelrolle 7 gestrichelt in einer Position außerhalb der Abrollstation 1 dargestellt.New, that is to say full, winding rolls are fed to the unwinding station 1 by means of a feed device 37 which comprises a transport carriage 39 which can be moved on the rails 38 laid on the foundation 17. The rails 38 extend into the image plane of FIG. 1, that is to say that the transport carriage 39 can be moved transversely to the longitudinal extent of the unwinding station 1. The transport carriage 39 has a base frame 41 on which guide rails 43 are attached, on which bearing journals 31 of a reel 45 are supported. A winding roll 47 is wound on the reel 45 and can have a diameter of, for example, 3,500 mm and above. Of course, the diameter of the winding roll 47 can also be less than 3,500 mm. The guide rails 43 of the transport carriage 39 are at the same height as the running rails 27 of the guide device 25, so that the center 49 of the winding roller 47 is also arranged on the first straight line G1. This results in particular in the advantage that a winding roll transported to the unwind station by means of the feed device 37 only has to be unrolled over the guide rails 43 of the transport carriage 39 when being transferred to the unwind station 39 in order to be transported on the running rails 27 of the guide device 25. First, however, the winding roll 23 guided by the primary unrolling device 19 must be transferred to the secondary unrolling device 9, which will be discussed in more detail below. A unwound winding roll can be brought out of the unwinding station 1 by means of a lifting device, not shown. In Figure 1, the unwound winding roll 7 is shown in dashed lines in a position outside the unwind station 1.

Figur 2 zeigt schematisch einen Teil der Abrollstation 1 gemäß Figur 1 im vergrößerten Maßstab, nämlich die Wickelrollen 23, 7 und die Klebevorrichtung 13. Gleiche Teile sind mit gleichen Bezugszeichen versehen, so daß insofern auf die Beschreibung zur Figur 1 verwiesen werden kann. Die Klebevorrichtung 13 der Abrollstation 1 umfaßt einen Klebewagen 51, der die Klebewalze 11 hält. Diese kann aus Metall, insbesondere Stahl, oder einem kohlfaserverstärkten Kunststoff (CFK-Klebewalze) bestehen und beispielsweise einen Durchmesser von 850 mm aufweisen. Die Klebewalze 11 kann mittels einer nicht dargestellten Verlagerungseinrichtung gegenüber dem Klebewagen 51 verlagert werden. Die Verlagerungseinrichtung kann beispielsweise als Schwenkeinrichtung ausgebildet werden. Dem Klebewagen 51 ist eine Linearführungseinrichtung 53 zugeordnet, die zwei Linearführungen 55 aufweist, von denen in Figur 2 lediglich die an einer Tragleiste 54 angebrachte Linearführung erkennbar ist. Weiterhin umfaßt die Linearführungseinrichtung 53 ein Linearschlittenpaar 57, also zwei Linearschlitten 57, die jeweils auf einer Seite des Klebewagens 51 angeordnet und über mehrere, hier insgesamt drei Lager 59 mit diesem verbunden sind. Dem Klebewagen 51 ist eine Antriebseinrichtung 61 zugeordnet, die bei diesem Ausführungsbeispiel als Kolben- und Zylindereinheit ausgebildet ist, die einen schwenkbar am Fundament 17 gelagerten Zylinder 63 und eine in diesem geführte Kolbenstange 65 umfaßt. Diese ist mit dem Klebewagen 51 verbunden, so daß bei einer Ein- beziehungsweise einer Ausfahrbewegung der Kolbenstange 65 der Klebewagen 51 mittels der Linearführungseinrichtung 53 verfahren wird. An dem Klebewagen 51 ist eine Schneideinrichtung 69 angebracht, die ein vorzugsweise mit Zacken versehenes Abschlagmesser 71 aufweist. Dieses ist mittels einer -in Figur 2 nicht dargestellten- am Klebewagen 51 angeordneten Verlagerungseinrichtung gegenüber dem Klebewagen 51 verlagerbar. Beispielsweise kann die Verlagerungseinrichtung als Schwenkeinrichtung ausgebildet werden, so daß das Abschlagmesser 71 gegenüber dem Klebewagen verschwenkbar ist.FIG. 2 schematically shows part of the unwind station 1 according to FIG. 1 on an enlarged scale, namely the winding rollers 23, 7 and the adhesive device 13. The same parts are provided with the same reference numerals, so that reference can be made to the description of FIG. 1. The adhesive device 13 of the unwinding station 1 comprises an adhesive carriage 51 which holds the adhesive roller 11. This can consist of metal, in particular steel, or a carbon fiber reinforced plastic (CFRP adhesive roller) and can have a diameter of 850 mm, for example. The adhesive roller 11 can be displaced relative to the adhesive carriage 51 by means of a displacement device (not shown). The displacement device can be designed, for example, as a swivel device. A linear guide device 53 is assigned to the adhesive carriage 51, which has two linear guides 55, of which only the linear guide attached to a support bar 54 can be seen in FIG. Furthermore, the linear guide device 53 comprises a pair of linear carriages 57, that is to say two linear carriages 57, each arranged on one side of the adhesive carriage 51 and connected to the latter via a plurality of bearings 59, here a total of three. A drive device 61 is assigned to the adhesive carriage 51, which in this exemplary embodiment is designed as a piston and cylinder unit, which comprises a cylinder 63 pivotably mounted on the foundation 17 and a piston rod 65 guided therein. This is connected to the adhesive carriage 51, so that when the piston rod 65 moves in or out, the adhesive carriage 51 is moved by means of the linear guide device 53. A cutting device 69 is attached to the adhesive carriage 51, which is preferably provided with teeth Tee knife 71 has. This can be displaced relative to the adhesive carriage 51 by means of a displacement device (not shown in FIG. 2) arranged on the adhesive carriage 51. For example, the displacement device can be designed as a swivel device so that the knock-off knife 71 can be swiveled with respect to the adhesive carriage.

Der Drehpunkt der am Klebewagen 51 befestigten Klebewalze 11, der ein Drehantrieb zugeordnet werden kann, liegt bei diesem Ausführungsbeispiel genau vertikal unterhalb des Schwerpunktes der Klebewalze 11. Dadurch wirkt sich das Eigengewicht der Klebewalze 11 nur im geringen Maße auf deren Bewegung aus. Der Mittelpunkt 67 der Klebewalze 11 liegt auf einer gedachten -gestrichelt dargestellten- zweiten Geraden G2, die hier den Mittelpunkt 33 der von der Primär-Abrolleinrichtung 19 geführten Wickelrolle 23 schneidet. Die zweite Gerade G2 ist gegenüber dem Fundament um einen Winkel β geneigt, der hier ca. 40° beträgt. Bei einer anderen Ausführungsform der Abrollstation kann die zweite Gerade G2 gegenüber dem Fundament auch um einen Winkel β geneigt sein, der größer oder kleiner als 40° ist, das heißt die Steigung der zweiten Geraden G2 ist variierbar.In this exemplary embodiment, the fulcrum of the adhesive roller 11 attached to the adhesive carriage 51, to which a rotary drive can be assigned, lies exactly vertically below the center of gravity of the adhesive roller 11. As a result, the dead weight of the adhesive roller 11 has only a slight effect on its movement. The center 67 of the adhesive roller 11 lies on an imaginary second straight line G2, shown in broken lines, which here intersects the center 33 of the winding roller 23 guided by the primary unwinding device 19. The second straight line G2 is inclined relative to the foundation by an angle β, which here is approximately 40 °. In another embodiment of the unwinding station, the second straight line G2 can also be inclined relative to the foundation by an angle β which is greater or less than 40 °, that is to say the slope of the second straight line G2 can be varied.

Mit der Klebevorrichtung 13 wirkt eine Führungsrolle 73 zusammen, die vor dem Verbinden der auf den Wickelrollen 7 und 23 aufgewickelten Materialbahnen in die zwischen der Wickelrolle 7 und der Klebewalze 11 in einem freien Zug geführten -von der Wickelrolle 7 ablaufenden- Materialbahn verlagerbar ist. Die von mindestens einer Walze oder einer Rohrwelle, vorzugsweise mehreren Walzen oder Rohrwellen, gebildete Führungsrolle 73 kann in die in Figur 2 mit gestrichelter Linie dargestellte Position verschwenkt werden. Außerdem ist es möglich, daß auch die Führungsrolle 73 entlang einer Geraden überführt wird. Der Führungsrolle 73 kann ein Antrieb zugeordnet werden, so daß der Materialbahnzug eingestellt werden kann. Die Schneideinrichtung 69 ist der Führungsrolle 73 -in Laufrichtung der Materialbahn gesehen- nachgeordnet, daß heißt die Schneideinrichtung 69 ist in dem Bereich zwischen dem von der Klebewalze 11 und der Wickelrolle 23 gebildeten Klebenip und der Führungsrolle 73 angeordnet. Um das Gewicht des Klebewagens 51 zu reduzieren, ist bei einem vorteilhaften Ausführungsbeispiel vorgesehen, sogenannte Fetzenabweiser, die beim Abtrennen der Materialbahn von dieser abgerissene Bahnfetzen von der Materialbahn entfernen beziehungsweise von dieser fern halten, stationär im Keller zu montieren.A guide roller 73 interacts with the adhesive device 13 and, prior to the connection of the material webs wound on the winding rollers 7 and 23, can be displaced into the material web which runs between the winding roller 7 and the adhesive roller 11 in a free train and runs off the winding roller 7. The guide roller 73 formed by at least one roller or a tubular shaft, preferably a plurality of rollers or tubular shafts, can be inserted into the be pivoted in Figure 2 with the dashed line position. It is also possible that the guide roller 73 is also transferred along a straight line. A drive can be assigned to the guide roller 73 so that the material web tension can be adjusted. The cutting device 69 is arranged downstream of the guide roller 73, as seen in the direction of travel of the material web, that is to say the cutting device 69 is arranged in the region between the adhesive nip formed by the adhesive roller 11 and the winding roller 23 and the guide roller 73. In order to reduce the weight of the adhesive carriage 51, in an advantageous exemplary embodiment, so-called scraper deflectors, which remove or keep away web scraps torn from the material web when the material web is separated from it, are stationary in the basement.

Die Führungsrolle 73 ist an dem Klebewagen 51 vorzugsweise drehbeweglich angebracht, so daß insgesamt eine aus der Klebewalze 11, der Schneideinrichtung 69 und der Führungsrolle 73 umfassende, kompakt bauende Einheit gebildet wird. Bei einem anderen Ausführungsbeispiel ist vorgesehen, daß die Führungsrolle 73 derart geführt ist, daß sie relativ gegenüber dem Klebewagen 51 verlagerbar ist.The guide roller 73 is preferably attached to the adhesive carriage 51 such that it can rotate, so that overall a compact unit comprising the adhesive roller 11, the cutting device 69 and the guide roller 73 is formed. In another embodiment it is provided that the guide roller 73 is guided such that it can be displaced relative to the adhesive carriage 51.

Bevor die Materialbahnen der Wickelrollen 7, 23 miteinander verbunden werden, wird die äußere Lage der Wickelrolle 23 an der darunterliegenden Lage befestigt, üblicherweise durch Verkleben mittels eines speziellen Klebebandes. Das Klebeband ist derart gestaltet, daß auf der Außenfläche der Wikkelrolle 23 freie Klebestellen verbleiben, an die während des Klebevorgangs die von der Sekundär-Abrolleinrichtung 9 geführte Wickelrolle 7 ablaufende Materialbahn mittels der Klebewalze 11 angeheftet wird. Das Verbinden der Materialbahnen während des Betriebs der Abrollstation 1 bei einer Laufgeschwindigkeit der Materialbahn von bis zu 2000 m/min und darüber wird auch als "Flying Splice" bezeichnet. Diese Bezeichnung wird immer dann gewählt, wenn die Verbindung von Materialbahnen stattfindet, während diese sich bewegen.Before the material webs of the winding rolls 7, 23 are connected to one another, the outer layer of the winding roll 23 is fastened to the layer below, usually by gluing with a special adhesive tape. The adhesive tape is designed in such a way that free adhesive points remain on the outer surface of the winding roll 23, to which during the gluing process that of the secondary unrolling device 9 guided winding roll 7 running material web is attached by means of the adhesive roller 11. The connection of the material webs during the operation of the unwind station 1 at a running speed of the material web of up to 2000 m / min and above is also referred to as a "flying splice". This designation is chosen whenever the connection of material webs takes place while they are moving.

Im folgenden wird die Funktion der Klebevorrichtung 13 anhand eines Klebevorgangs näher erläutert: Zunächst läuft die Materialbahn 3 -wie in Figur 2 dargestellt- von der von der Sekundär-Abrolleinrichtung 9 geführten Wickelrolle 7 ab und wird über die Klebewalze 11 und die feststehend mit dem Fundament 17 verbundene Leitwalze 15 zur Verarbeitungsmaschine geführt. Bevor die Wickelrolle 7 vollständig abgewickelt ist, wird die Führungsrolle 73 in den freien Zug zwischen der Wickelrolle 7 und der Klebewalze 11 geführten Materialbahn 3 verschwenkt. Dadurch wird die Materialbahn 3 ausgelenkt. Gleichzeitig oder zeitlich nachfolgend wird die dem Klebewagen 51 zugeordnete Antriebseinrichtung 61 betätigt, worauf deren Kolbenstange 65 aus dem Zylinder 63 ausfährt. Dadurch wird der Klebewagen 51 angelenkt und mittels der Linearführungseinrichtung 53 bis unmittelbar an die von der Primär-Abrolleinrichtung 19 geführten Wickelrolle 23 verfahren. Diese ist in der Zwischenzeit von einem Antrieb derart beschleunigt worden, daß deren Umfangsgeschwindigkeit im wesentlichen mit der Geschwindigkeit der von der Wickelrolle 7 ablaufenden Materialbahn 3 übereinstimmt. Eine nicht dargestellte Steuerungselektronik erkennt, wo sich die vorbereitete Klebestelle auf dem Umfang der Wickelrolle 23 befindet. Wird nun der eigentliche Klebevorgang eingeleitet, was manuell oder automatisch erfolgen kann, so wird in zeitlicher Abhängigkeit von dem Umlauf der Klebestelle die Klebewalze 11 mittels der nicht dargestellten Verlagerungseinrichtung sehr schnell gegen die Wickelrolle 23 gedrückt, das Abschlagmesser 71 der Schneideinrichtung 69 im Übergangsbereich zwischen der Führungsrolle 73 und der Klebewalze 11 gegen die Materialbahn 3 bewegt, so daß diese, vorzugsweise auf der gesamten Breite, durchtrennt wird. Damit das von der Wickelrolle 7 abgewickelte Ende der Materialbahn 3 nicht in den Klebenip zwischen der Klebewalze 11 und der Wickelrolle 23 gelangt, sind nicht dargestellte Blaseinrichtungen vorgesehen, die das Materialbahnende vom Klebenip fernhalten. Das abgetrennte Ende der Materialbahn 3 wird in dem Klebenip an die auf der Wickelrolle 23 aufgewickelte Materialbahn geklebt. Die Klebewirkung der auf der Außenseite der Wickelrolle 23 befindlichen Klebestellen ist größer als die der Klebestellen, die die äußere Lage mit der darunterliegenden Lage verbinden. Dadurch wird die auf der Wickelrolle 23 aufgewickelte Materialbahn durch den Abrollzug gelöst und abgewickelt.The function of the gluing device 13 is explained in more detail below with the aid of a gluing process: First, the material web 3 runs - as shown in FIG. 2 - from the winding roll 7 guided by the secondary unrolling device 9 and is fixed with the foundation via the gluing roll 11 17 connected guide roller 15 led to the processing machine. Before the winding roller 7 is completely unwound, the guide roller 73 is pivoted into the free train between the winding roller 7 and the adhesive roller 11 guided material web 3. The material web 3 is thereby deflected. Simultaneously or at a later time, the drive device 61 assigned to the adhesive carriage 51 is actuated, whereupon its piston rod 65 extends out of the cylinder 63. As a result, the adhesive carriage 51 is articulated and moved by means of the linear guide device 53 directly to the winding roll 23 guided by the primary unrolling device 19. In the meantime, this has been accelerated by a drive in such a way that its peripheral speed essentially corresponds to the speed of the material web 3 running off the winding roll 7. A control electronics, not shown, recognizes where the prepared glue point is on the circumference of the winding roll 23 is located. If the actual gluing process is now initiated, which can be done manually or automatically, the gluing roller 11 is pressed very quickly against the winding roller 23 by means of the displacement device, not shown, depending on the rotation of the gluing point, the knock-off knife 71 of the cutting device 69 in the transition area between the Guide roller 73 and the adhesive roller 11 moves against the material web 3, so that it is cut, preferably over the entire width. So that the end of the material web 3 unwound from the winding roll 7 does not get into the adhesive nip between the adhesive roller 11 and the winding roller 23, blowing devices (not shown) are provided which keep the material web end away from the adhesive nip. The severed end of the material web 3 is glued in the adhesive nip to the material web wound on the winding roll 23. The adhesive effect of the adhesive points located on the outside of the winding roller 23 is greater than that of the adhesive points which connect the outer layer to the layer below. As a result, the material web wound on the winding roll 23 is released and unwound by the unwinding train.

Nachdem der Klebevorgang abgeschlossen ist, werden Klebewagen 51 und Führungsrolle 73 in ihre Ausgangsstellungen zurückverfahren beziehungsweise verschwenkt. Der von der Sekundär-Abrolleinrichtung 9 geführte Tambour 5, auf dem sich noch ein Rest der Wickelrolle 7 befindet, wird -wie in Figur 1 angedeutet- aus der Abrollstation 1 ausgebracht, beispielsweise mittels einer Anhebevorrichtung. Anschließend werden die bis dahin von der Primär-Abrolleinrichtung 19 geführte Wickelrolle 23 mittels der in Figur 2 nicht dargestellten Führungseinrichtung 25 und der Transportschlitten 32 entlang der ersten Geraden G1 an die Sekundär-Abrolleinrichtung 9 überführt.After the gluing process is completed, gluing carriage 51 and guide roller 73 are moved back or swiveled into their starting positions. The drum 5 guided by the secondary unrolling device 9, on which there is still a remainder of the winding roll 7, is - as indicated in FIG. 1 - brought out of the unwinding station 1, for example by means of a lifting device. Subsequently, the winding roll 23, which has been guided by the primary unrolling device 19, is then used the guide device 25 (not shown in FIG. 2) and the transport carriage 32 are transferred to the secondary unrolling device 9 along the first straight line G1.

Durch die Verlagerung der Klebewalze 11 entlang der zweiten Geraden G2 wird sichergestellt, daß der zwischen der Klebewalze 11 und der Wickelrolle 23 gebildete Klebenip immer auf der zweiten Geraden G2 liegt, unabhängig davon, welchen Durchmesser die Wickelrolle 23 aufweist. Dadurch wird sichergestellt, daß der Einlaufwinkel der von der Sekundär-Abrolleinrichtung geführten Wickelrolle 7 ablaufenden Materialbahn 3 vom Durchmesser der von der Primär-Abrolleinrichtung geführten Wickelrolle unabhängig und im wesentlichen konstant ist. Besonders vorteilhaft ist, daß bei jedem Klebevorgang gleiche Verhältnisse vorliegen, so daß ein reproduzierbares Verbinden der Materialbahnen möglich ist. Die Klebewalze 11 kann gleichmäßig an die Wickelrolle 23 gepreßt werden, so daß vorzugsweise gleichbleibende Linienkräfte im Klebenip eingestellt werden können. Hierdurch kann eine besonders hohe Funktionssicherheit der Klebevorrichtung 13 und somit der Abrollstation 1 sichergestellt werden.The displacement of the adhesive roller 11 along the second straight line G2 ensures that the adhesive nip formed between the adhesive roller 11 and the winding roller 23 is always on the second straight line G2, regardless of the diameter of the winding roller 23. This ensures that the run-in angle of the material roll 3 running off the secondary unwinding device 7 is independent of the diameter of the winding roll guided by the primary unwinding device and is essentially constant. It is particularly advantageous that the same conditions are present with each gluing process, so that a reproducible connection of the material webs is possible. The adhesive roller 11 can be pressed evenly against the winding roller 23, so that preferably constant line forces can be set in the adhesive nip. This enables a particularly high level of functional reliability of the adhesive device 13 and thus of the unwinding station 1 to be ensured.

In Figur 2 ist die Wickelrolle 23 mit verschiedenen Durchmessern dargestellt. Der größte Durchmesser der mit einer durchgezogenen Linie dargestellten Wickelrolle kann beispielsweise 3.500 mm betragen. Die Klebewalze 11 ist gestrichelt in einer Position dargestellt, in der diese einen Klebenip mit einer Wickelrolle 23' bildet, die einen Durchmesser von beispielsweise 2.200 mm aufweist. Weiterhin ist die Wickelrolle 23 mit einer gestrichelten Linie 75 in einer Position dargestellt, in der Materialbahn bereits soweit abgewickelt worden ist, daß der Durchmesser beispielsweise ca. 1.900 mm beträgt. Bei diesem Durchmesser der von der Primär-Abrolleinrichtung 19 geführten Wickelrolle 23 wird die Wickelrolle 23 entlang der ersten Geraden G1 an die Sekundär-Abrolleinrichtung 9 überführt. Die Durchmesserangaben beziehungsweise die daraus ableitbaren Verhältnisse sollen lediglich beispielhaft verstanden werden.In Figure 2, the winding roll 23 is shown with different diameters. The largest diameter of the winding roll shown with a solid line can be, for example, 3,500 mm. The adhesive roller 11 is shown in dashed lines in a position in which it forms an adhesive nip with a winding roller 23 'which has a diameter of, for example, 2,200 mm. Furthermore, the winding roll 23 is shown with a dashed line 75 in a position already in the material web has been developed so far that the diameter is, for example, approximately 1,900 mm. With this diameter of the winding roll 23 guided by the primary unrolling device 19, the winding roll 23 is transferred to the secondary unrolling device 9 along the first straight line G1. The diameter specifications and the ratios derived therefrom are only to be understood as examples.

Besonders vorteilhaft bei der Überführung der Wikkelrolle entlang der parallel zur Horizontalen H verlaufenden Geraden ist, daß keine in Richtung der Längserstreckung der Abrollstation 1 wirkenden Kräfte in das Fundament 17 eingeleitet werden, wie sie bei einem Überführen der Wickelrolle mittels Schwenkarme auftreten.It is particularly advantageous when transferring the winding roll along the straight line running parallel to the horizontal H that no forces acting in the direction of the longitudinal extension of the unwinding station 1 are introduced into the foundation 17, as occurs when the winding roll is transferred by means of swivel arms.

Figur 3 zeigt stark schematisiert eine Draufsicht auf ein Ausführungsbeispiel der Abrollstation 1. Teile, die mit denen anhand der Figuren 1 und 2 beschriebenen übereinstimmen, sind mit gleichen Bezugszeichen versehen, so daß insofern auf die Beschreibung der Figuren 1 und 2 verwiesen wird. In der in Figur 3 dargestellen Funktionsstellung der Abrollstation 1 wird eine Wickelrolle 77 von der Primär-Abrolleinrichtung 19 geführt. Die Wickelrolle 77 ist über den rechten Lagerzapfen 31 mit einem stationären Antrieb 79 der Primär-Abrolleinrichtung 19 verbunden. Im Zusammenhang mit der vorliegenden Erfindung wird unter einer "stationären" Anordnung eine fixe, unveränderliche Position verstanden. Der auf einem auf dem Fundament 17 stehenden Sockel (siehe Figur 4) angebrachte Antrieb 79 dient dazu, die Wickelrolle 77 mit einem Drehmoment zu beaufschlagen, so daß diese auf Laufgeschwindigkeit der in Figur 3 nicht dargestellten Materialbahn beschleunigt und gehalten werden kann. Die Primär-Abrolleinrichtung 19 weist weiterhin einen Bremsgenerator auf, mittels dessen die Wickelrolle 77 abgebremst werden kann. Der Bremsgenerator, beispielsweise ein Elektromotor, kann ebenfalls -wie der Antrieb 79- auf einem feststehenden Sockel angebracht werden. Bei Verwendung eines Elektromotors als Bremsgenerator kann dieser -je nach Betriebssituation- auch als Motor betrieben werden, beispielsweise beim Anfahren der Abrollstation oder während des laufenden Betriebs der Wickelstation, das heißt während die Wickelrolle von der Primär-Abrollvorrichtung 19 geführt wird.Figure 3 shows a highly schematic plan view of an embodiment of the unwind station 1. Parts that correspond to those described with reference to Figures 1 and 2 are provided with the same reference numerals, so that reference is made to the description of Figures 1 and 2. In the functional position of the unwinding station 1 shown in FIG. 3, a winding roll 77 is guided by the primary unrolling device 19. The winding roll 77 is connected to a stationary drive 79 of the primary unrolling device 19 via the right journal 31. In connection with the present invention, a "stationary" arrangement is understood to mean a fixed, unchangeable position. The drive 79 attached to a base standing on the foundation 17 (see FIG. 4) serves to apply a torque to the winding roller 77 so that it runs at running speed the material web, not shown in Figure 3, can be accelerated and held. The primary unwinding device 19 also has a brake generator, by means of which the winding roller 77 can be braked. Like the drive 79, the brake generator, for example an electric motor, can also be attached to a fixed base. If an electric motor is used as the brake generator, it can also be operated as a motor, depending on the operating situation, for example when starting the unwind station or while the winding station is in operation, that is to say while the winding roll is being guided by the primary unwinding device 19.

Der linke Lagerzapfen 31 der Wickelrolle 77 ist mit einem Hilfsantrieb 81 gekoppelt, der auf einer Laufschiene 83 geführt wird. Die Laufschiene 83 ist parallel zu den Laufschienen 27 und 27' der Führungseinrichtung 25 ausgerichtet, das heißt der Hilfsantrieb 81 ist parallel zu der Geraden G1 verfahrbar. Die Aufgabe des Hilfsantriebs 81 besteht darin, während der Überführung der Wickelrolle 77 von der Primär-Abrolleinrichtung 19 an die Sekundär-Abrolleinrichtung 9 entlang der Geraden G1 den Abrollzug der von der Wickelrolle 77 ablaufenden Materialbahn auf einem gewünschten Wert zu halten beziehungsweise einzustellen. Der Hilfsantrieb 81 ist mit mindestens einem der in Figur 3 nicht dargestellten Transport(Sekundär-)Schlitten 32 gekoppelt und wird gemeinsam mit der Wickelrolle 77 an die Sekundär-Abrolleinrichtung 9 überführt. Der Antrieb der Transportschlitten erfolgt -wie oben beschrieben- mittels wenigstens einer Spindel.The left bearing pin 31 of the winding roller 77 is coupled to an auxiliary drive 81 which is guided on a running rail 83. The running rail 83 is aligned parallel to the running rails 27 and 27 'of the guide device 25, that is to say the auxiliary drive 81 can be moved parallel to the straight line G1. The task of the auxiliary drive 81 is to maintain or adjust the unwinding of the material web running off the winding roll 77 to a desired value during the transfer of the winding roll 77 from the primary unrolling device 19 to the secondary unrolling device 9 along the straight line G1. The auxiliary drive 81 is coupled to at least one of the transport (secondary) slides 32 (not shown in FIG. 3) and is transferred together with the winding roll 77 to the secondary unrolling device 9. As described above, the transport carriage is driven by means of at least one spindle.

Wie aus Figur 3 ersichtlich, umfaßt die Sekundär-Abrolleinrichtung 9 ebenfalls einen stationären Antrieb 85 und einen nicht dargestellten, beispielsweise auf einem feststehenden Sockel befestigten Bremsgenerator. Die Antriebe 79 und 85 weisen vorzugsweise einen identischen Aufbau auf. Die ortsfesten Antriebe 79 und 85 sind auf der Triebseite der Abrollstation 1 angeordnet. Demgemäß ist der Hilfsantrieb 81 auf der Führerseite der Abrollstation angeordnet.As can be seen from FIG. 3, the secondary unrolling device 9 likewise comprises a stationary drive 85 and a brake generator (not shown), for example attached to a fixed base. The drives 79 and 85 preferably have an identical structure. The stationary drives 79 and 85 are arranged on the drive side of the unwind station 1. Accordingly, the auxiliary drive 81 is arranged on the operator side of the unwind station.

Bevor die Wickelrolle 77 an die Sekundär-Abrolleinrichtung 9 überführt wird, wird der Hilfsantrieb 81 mit der Wickelrolle 77 gekoppelt, während die Verbindung der Wickelrolle 77 mit dem Antrieb 79 der Primär-Abrolleinrichtung 19 unterbrochen wird. Während der Überführung wird -wie oben beschriebendie Wickelrolle von dem auf der Laufschiene 83 geführten Hilfsantrieb 81 angetrieben, bis diese mit dem Antrieb 85 der Sekundär-Abrolleinrichtung 9 gekoppelt und von diesem angetrieben wird. Darüber hinaus ist es möglich, daß der Hilfsantrieb 81 weiterhin mit der von der Sekundär-Abrolleinrichtung 9 geführten und von deren Antrieb 85 angetriebenen beziehungsweise abgebremsten Wickelrolle 77 gekoppelt bleibt und durch Umkehrung der Betriebsweise zur Abbremsung der Wickelrolle 77 beiträgt.Before the winding roll 77 is transferred to the secondary unrolling device 9, the auxiliary drive 81 is coupled to the winding roll 77, while the connection of the winding roll 77 to the drive 79 of the primary unrolling device 19 is interrupted. During the transfer, as described above, the winding roll is driven by the auxiliary drive 81 guided on the running rail 83 until it is coupled to the drive 85 of the secondary unrolling device 9 and driven by the latter. In addition, it is possible for the auxiliary drive 81 to remain coupled to the winding roller 77 guided by the secondary unwinding device 9 and driven or braked by its drive 85 and to contribute to the braking of the winding roller 77 by reversing the mode of operation.

Durch das Zusammenwirken des Hilfsantriebs 81 mit den Antrieben 79, 85 der Primär- beziehungsweise Sekundär-Abrolleinrichtung können die Schwankungen des Materialbahnzugs sehr klein gehalten werden. Hierdurch kann die Klebestelle zwischen zwei Materialbahnen, der sogenannte Splice, sicher durch die der Abrollstation nachgeordnete Verarbeitungsmaschine geführt werden.Due to the interaction of the auxiliary drive 81 with the drives 79, 85 of the primary or secondary unwinding device, the fluctuations in the material web tension can be kept very small. As a result, the glue point between two material webs, the so-called splice, can be guided safely through the processing machine downstream of the unwinding station.

Aus allem wird deutlich, daß der Hilfsantrieb 81 auch dann eingesetzt werden kann, wenn die Wickelrolle 77 entweder von der Primär-Abrolleinrichtung 19 oder von der Sekundär-Abrolleinrichtung 9 geführt wird und von dem Antrieb 79, 85 der jeweiligen Abrollstation angetrieben beziehungsweise abgebremst wird. Bei einem anderen vorteilhaften Ausführungsbeispiel der Abrollstation sind zwei parallel zu der ersten Geraden G1 verfahrbare Hilfsantriebe vorgesehen. Dadurch ist es möglich, auf die anhand der Figur 3 beschriebenen stationären Antriebe 79, 85 zu verzichten. Die auf gegenüberliegenden Seiten der Abrollstation anordenbaren Hilfsantriebe können derart eingesetzt werden, daß eine volle Wickelrolle während des gesamten Abwickelvorgangs ausschließlich von einem der beiden Hilfsantriebe angetrieben beziehungsweise abgebremst wird. Die Wickelrolle kann also während sie von der Primär-Abrolleinrichtung 19 geführt, von der Primäran die Sekundär-Abrolleinrichtung überführt und während sie von der Sekundär-Abrolleinrichtung geführt wird, von dem Hilfsantrieb angetrieben beziehungsweise abgebremst werden. Eine zwei verfahrbare Hilfsantriebe aufweisende Abrollstation weist einen einfacheren Aufbau auf als die anhand der Figur 3 beschriebene Abrollstation, da diese insgesamt drei Antriebe, zwei stationäre und einen Hilfsantrieb, benötigt.It is clear from everything that the auxiliary drive 81 can also be used when the winding roll 77 is guided either by the primary unrolling device 19 or by the secondary unrolling device 9 and is driven or braked by the drive 79, 85 of the respective unwinding station. In another advantageous exemplary embodiment of the unwinding station, two auxiliary drives that can be moved parallel to the first straight line G1 are provided. This makes it possible to dispense with the stationary drives 79, 85 described with reference to FIG. 3. The auxiliary drives which can be arranged on opposite sides of the unwind station can be used in such a way that a full winding roll is driven or braked exclusively by one of the two auxiliary drives during the entire unwinding process. The winding roll can thus be driven or braked by the auxiliary drive while being guided by the primary unrolling device 19, transferred from the primary to the secondary unrolling device and while being guided by the secondary unrolling device. A roll-off station having two movable auxiliary drives has a simpler structure than the roll-off station described with reference to FIG. 3, since it requires a total of three drives, two stationary and one auxiliary drive.

Figur 4 zeigt einen Querschnitt durch die Abrollstation 1 gemäß Figur 3. Der Antrieb 79 ist auf einem auf dem Fundament 17 stehenden Sockel 87, beispielsweise einen Betonsockel, angeordnet. Die Laufschiene 83, auf der der Hilfsantrieb 81 beziehungsweise ein mit diesem verbundener Balken 89 geführt wird, ist ebenfalls auf dem Fundament 17 befestigt. Um eine stabile und schwingungsunempfindliche Anbringung des Hilfsantriebs 81 zu realisieren, weist der Balken 89 bei diesem Ausführungsbeispiel einen abgewinkelten Verlauf auf und wird daher aufgrund seiner Kontur auch als "Surfer" bezeichnet. Bei einem anderen Ausführungsbeispiel weist der Balken einen geraden Verlauf auf, mit dem ebenfalls eine schwingungsempfindliche und stabile Anbringung des Hilfsantriebs 81 möglich ist.FIG. 4 shows a cross section through the unwinding station 1 according to FIG. 3. The drive 79 is arranged on a base 87 standing on the foundation 17, for example a concrete base. The running rail 83, on which the auxiliary drive 81 or a beam 89 connected to it is guided, is also fastened to the foundation 17. In order to achieve a stable and vibration-insensitive attachment of the auxiliary drive 81, the bar 89 in this embodiment has an angled course and is therefore also referred to as a "surfer" due to its contour. In another exemplary embodiment, the bar has a straight course, with which a vibration-sensitive and stable attachment of the auxiliary drive 81 is also possible.

Aus allem wird deutlich, daß der Aufbau der anhand der Figuren 1 bis 4 beschriebenen Abrollstation 1 gegenüber dem der bekannten -eingangs beschriebenen- Abrollstation wesentlich vereinfacht werden kann. Dies wird durch die Überführung der Wickelrolle von der Primär- an die Sekundär-Abrolleinrichtung und durch die Verlagerung der Klebewalze jeweils entlang einer Geraden ermöglicht. Auf aufwendige Schwenkarmkonstruktionen kann hierbei verzichtet werden, so daß auch eine einfache Montage der Abrollstation möglich ist. Weiterhin können die Länge und die Bauhöhe der Abrollstation und somit deren Kosten reduziert werden.It is clear from everything that the construction of the unwinding station 1 described with reference to FIGS. 1 to 4 can be considerably simplified compared to the unwinding station described at the beginning. This is made possible by the transfer of the winding roll from the primary to the secondary unwinding device and by the displacement of the adhesive roller along a straight line. There is no need for complex swivel arm constructions, so that the unwinding station can also be easily assembled. Furthermore, the length and height of the unwind station and thus its costs can be reduced.

Claims (13)

  1. Unwind station (1) for the continuous unwinding of a material web (3), especially a paper or board web, for a machine, especially coating machine, for processing the material web (3), which comprises a primary unwind device (19), a secondary unwind device (9) and an adhesive bonding device (13), which joins to each other material webs running off two wound reels in each case guided by one of the unwind devices (9, 19), it being possible, after the material webs have been joined to each other, for the wound reel guided by the primary unwind device (19) to be transferred to the secondary unwind device (9) by means of a guide device (25), and which station has a drive (79, 85) for each unwind device (9, 19), characterized by an auxiliary device (81) which can be displaced together with the wound reel (77) and with the aid of which the unwind draw of the material web (3) can be adjusted and the wound reel (77) can additionally be driven and/or braked, each unwind device (9, 19) each being assigned a drive (85, 79) in a stationary manner.
  2. Unwind station according to Claim 1, characterized in that the wound reel can be displaced along a first straight line (G1) preferably running parallel to an imaginary horizontal.
  3. Unwind station according to Claim 1 or 2, characterized in that the guide device (25) comprises at least two running rails (27, 27') running parallel or substantially parallel to each other, on which the wound reel is guided.
  4. Unwind station according to one of the preceding claims, characterized in that the adhesive bonding device (13) has at least one bonding roll (11), which can be displaced along a second straight line (G2) by means of a linear guide device (53).
  5. Unwind station according to one of the preceding claims, characterized in that the second straight line (G2) is inclined at an angle β with respect to the foundation (horizontal (H)).
  6. Unwind station according to one of the preceding claims, characterized in that the slope of the second straight line (G2) can be varied.
  7. Unwind station according to one of the preceding claims, characterized in that the bonding roll (11) can be driven.
  8. Unwind station according to one of the preceding claims, characterized in that the linear guide device (53) has at least two linear guides (55) each having at least one linear slide (57).
  9. Unwind station according to one of the preceding claims, characterized in that the linear slides (57) are fitted to a bonding carriage (51), on which the bonding roll (11) is mounted.
  10. Unwind station according to Claim 9, characterized in that a drive device (61) is assigned to the bonding carriage (51).
  11. Unwind station according to one of the preceding claims, characterized in that a cutting device (69) having at least one knock-off knife (71) can be fixed to the bonding carriage (51).
  12. Unwind station according to one of the preceding claims, characterized in that the bonding roll (11) and the knock-off knife (71) can be displaced with respect to the bonding carriage (51), preferably can be pivoted.
  13. Unwind station according to one of the preceding claims, characterized in that the auxiliary drive (81) is guided on a running rail (83) which is preferably arranged parallel to the running rails (27, 27') of the guide device (25).
EP98109493A 1997-05-27 1998-05-26 Unwinding station for continuously unwinding a material web Expired - Lifetime EP0881181B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722209 1997-05-27
DE19722209A DE19722209A1 (en) 1997-05-27 1997-05-27 Unwind station for the continuous unwinding of a material web

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EP0881181A2 EP0881181A2 (en) 1998-12-02
EP0881181A3 EP0881181A3 (en) 1999-08-25
EP0881181B1 true EP0881181B1 (en) 2003-09-10

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US (1) US6386477B1 (en)
EP (1) EP0881181B1 (en)
AT (1) ATE249383T1 (en)
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ATE249383T1 (en) 2003-09-15
DE59809528D1 (en) 2003-10-16
DE19722209A1 (en) 1998-12-03
EP0881181A3 (en) 1999-08-25
EP0881181A2 (en) 1998-12-02
US6386477B1 (en) 2002-05-14

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