EP1163178B1 - Device for connecting material webs - Google Patents

Abstract

Devices of the prior art connect the end of an unwinding material web (42) to the front end (43) of a new roller (1) when material webs (4), especially paper webs or cardboard webs, are unwound. Said devices are provided with a device (16) for separating the web (4) and a device (6) for holding the end of the unwinding web (42). According to the invention, the holding device (6) is fixedly arranged on the web side of the unwinding material web (4) and is provided with two holding elements (7, 8) that are arranged at a distance from each other and in the running direction of the web. A device (12) for separating the web and applying an adhesive tape is mounted on the other side of the web and can be moved against the holding device (6). The device (12) for separating the web and applying an adhesive tape contains at least one apparatus (17) for applying the adhesive tape and at least one separating knife (16) that moves through the web level and into the spacing between the two holding elements (7, 8) when said device (12) moves against the holding device (6). The front end (43) of a new roller (1) is received by a web transport device (37) at the circumference of the roller (1) and is moved behind the area of the holding device (6). The device enables a buttsplice. The two webs are connected thereby without overlapping.

Description

Technical field

The invention relates to a device for connecting the end of an outgoing Material web with the start of a new winding roll when unwinding Material webs, especially paper or cardboard webs, from a winding roll.

State of the art

In unwinding devices for winding rolls made of material webs, for example paper or Cardboard webs, splicers are known which are the end of the leaking Connect the material web to the start of a new winding roll. When unwinding of heavy paper rolls on continuous metal axes (drum) are wound up and with a web width of 8 m and more a weight of more than 50 t, the unwinder is usually used for splicing and the subsequent processing machine is shut down.

From EP 0 462 157-B1 a device is known which has a device for Cutting and holding the running web has. The holding device for the running web is pivoted to counter this against a full To press the winding roll, at the beginning of which a tape is attached. It will such a connection is established in which the end of the outgoing web with the The beginning of the new winding roll overlaps at the splice point.

A device of the generic type is from DE 43 25 944 Al known. This device has a holding device to hold the end of the leaking Web on which is fixed on a web side of the running Track is arranged and has two holding elements, which are spaced apart in the direction of web travel are arranged. A rail transport device is used for picking up the start of a full winding roll on their scope and for transporting the beginning of the web to behind the area of the holding device. To cut the web is a cutting knife in a groove of the holding device arranged between the two holding elements. On the other side of the track is an up and down movable Strip dispenser arranged with which one Move the adhesive connecting strip against the sheets leaves. When moving a pressure piece against the holding element become the running track and the beginning severed the new track together. Thereby lie the new end of the path and the new beginning of the path immediately side by side and can be seamlessly connected become.

Such a connection, referred to as buttsplice without overlapping the two webs has the advantage that the connection point is not twice the web thickness and also no step-like heel (butt) on the Splice point arises. A bump at the splice point can cause faults in subsequent processing machines to lead.

Another device for making a buttsplice in film rolls is known from US 4 120 739 A.

Presentation of the invention

The invention has for its object a device to improve the generic type so that a overlap-free connection of very wide paper webs can be manufactured.

This object is achieved with the features of claim 1 solved.

The subclaims receive preferred because special advantageous embodiments of the invention.

Around the end of the web with the beginning of the web on both sides to glue on both sides of the web is in the embodiment according to claim 5 in the space between a second car across the two holding elements the working width is movably supported. This car carries a second tape applicator. In the embodiment according to claim 6, the second carriage to the first car connected to a travel drive become; for example by means of a movable bolt. It is used when cutting webs and applying adhesive tapes dragged along by the first car.

Claims 7 and 8 claim the preferred embodiment of the Invention in which the car consists of two parts that are rigid over a bridge are interconnected. There is a cutting knife on either side of the bridge arranged. This embodiment has two over the embodiment Wagons have the advantage of being cut in both directions of movement of the cart can be. The car therefore needs after cutting through the running Web not to be moved back to its original position to the new one Cut through the beginning of the web before gluing.

The device according to claims 7 and 8 has the further advantage that none additional storage for a second carriage in the holding device is required. Furthermore, due to their fixed connection, the two parts of the car with the elements attached to them for cutting and applying adhesive tape exactly aligned with each other. An exact alignment of the elements on both carriages or both parts of the wagon is required so that the railways run smoothly and precisely cut the highest possible working speed and apply the adhesive tapes can be.

Brief description of the drawing

Figur 1

zeigt in Seitenansicht den Aufbau einer erfindungsgemäßen Splicevorrichtung.

Figur 2

zeigt in einer vergrößerten Darstellung die Halteeinrichtung und die Bahntrenn- und Klebebandauftragseinrichtung beim Durchtrennen der Materialbahn.

Figur 3

zeigt die Halteeinrichtung und die Bahntrenn- und Klebebandauftragseinrichtung beim Auftragen der Klebebänder.

Figur 4

zeigt ausschnittsweise eine Ansicht gegen Bahnlaufrichtung auf die Halteeinrichtung.

Figur 5

zeigt eine Draufsicht auf die beiden Wagen mit jeweils einem Klebebandspender.

Die Figuren 6 bis 15

zeigen die Arbeitsweise der Splicevorrichtung.

Figur 16

zeigt in Seitenansicht den Aufbau einer alternativen Splicevorrichtung mit einem zweiteiligen Wagen.

Figur 17

zeigt in einer vergrößerten Darstellung die Halteeinrichtung und die Bahntrenn- und Klebebandauftragseinrichtung beim Durchtrennen der Materialbahn.

Figur 18

zeigt eine Draufsicht auf den zweiteiligen Wagen der Bahntrenn- und Klebebandauftragseinrichtung.

The drawing serves to explain the invention with reference to an embodiment shown in simplified form.

Figure 1

shows in side view the structure of a splicing device according to the invention.

Figure 2

shows in an enlarged view the holding device and the web cutting and tape application device when cutting the material web.

Figure 3

shows the holding device and the web separating and adhesive tape application device when applying the adhesive tapes.

Figure 4

shows a section of a view against the web running direction on the holding device.

Figure 5

shows a plan view of the two cars, each with an adhesive tape dispenser.

Figures 6 to 15

show the operation of the splicing device.

Figure 16

shows in side view the structure of an alternative splicing device with a two-part carriage.

Figure 17

shows in an enlarged view the holding device and the web cutting and tape application device when cutting the material web.

Figure 18

shows a plan view of the two-part carriage of the web separating and adhesive tape application device.

Ways of Carrying Out the Invention

The embodiments of the invention described below are each Part of a unwinding device for heavy paper rolls 1, which on as a reel designated continuous metal axes are wound and with a web width of 8 m and more can have a weight of over 50 t. The winding roll is with her drum 2 hung in a unwinding frame with two side stands 3. A side brake generator that both the winding roll 1 in generator mode braking, as well as driving in motor operation, is in the simplified Drawing not shown. The paper web 4 is from the winding roll 1 from above (as subtracted in the exemplary embodiments) or below and to one below arranged slitter winder, where they are in single webs cut lengthways and wound into smaller winding rolls.

At a distance behind the unwinder and outside the diameter range a full winding roll 1, a splicing device 5 is arranged through which the web 4th to be led. By means of the splicing device 5, when changing the winding reel End of the outgoing web with the start of the web of a new winding roll bumpless, So without overlapping the two tracks, in a so-called butt splice connected.

The splicing device 5 contains a fixed component arranged web holding device 6 with two holding elements 7, 8 in the web running direction are arranged at a distance of about 50 mm from each other. each Holding element 7, 8 has a parallel to the web 4 across the maximum Web width extending holding surface with which the web 4 can be held. A guide roller 9 is arranged in the web running direction in front of the holding device 6 Cooperation with another arranged behind the splicing device 5 Guide roller 10 on the web when unwinding with a small but sufficient distance passes the holding surfaces of the holding elements 7, 8, as shown in Figure 1.

The two holding elements 7, 8 can preferably be subjected to negative pressure Suction boxes whose wall 4 facing the web serves as a holding surface for suction openings 11 has to suck the web 4 and so to hold. The suction openings 11 are in Figure 4 shown.

In the area of the web holding device 6, a web separating and adhesive tape application device 12 is arranged on the other side of the web 4, which is pivotably mounted against the web holding device 6. The web separating and adhesive tape application device 12 consists of a pivotably mounted beam 13 which is open towards the web 4 and in which a carriage 14 which can be moved across the working width is mounted. A linear drive unit 15 fastened to the beam 13 and extending over its length serves as the drive, the driver of which is connected to the carriage 14.
The carriage 14, shown enlarged in FIGS. 2, 3 and 5, carries at least one separating knife 16, preferably a circular knife, for severing the web 4, and at least one adhesive tape applicator 17. The web separating and adhesive tape application device 12 is thus pivotably mounted against the web holding device 6, that when swiveling against the web 4, the swivel beam 13 presses it against both holding elements 7, 8. The carriage 14 approaches the space between the two holding elements 7, 8. In the pivoted position, the knife 16 can be moved into its cutting position with its cutting edge in the space between the two holding elements 7, 8 (FIG. 2), and the adhesive tape applicator 17 is movable for applying an adhesive tape 18 against the web 4 (Figure 3). The carriage 14 is mounted in the beam 13 so that it can move freely over the working width in the pivoted position.

A second is preferred in the space between the two holding elements 7, 8 Adhesive tape applicator 19 arranged on a across the working width movably mounted carriage is attached. So the end of the web can start with the web a new winding roll double-sided, i.e. glued on both sides of the web.

In the embodiment according to FIGS. 1 to 15, the second adhesive tape applicator is 19 on a separate carriage 20 that can be moved across the working width attached. The carriage 20 of the adhesive tape applicator 19 is on a linear guide 21 stored, which extends across the working width on the floor of the space is fastened between the holding elements 7, 8 of the holding device 6.

In Figure 5 are the structure of the two carriages 14, 20 with the attached Aggregates shown in more detail:

Since only the carriage 14 is connected to a travel drive, the second carriage 20 can be coupled to it by means of a movable bolt 21. On the car 14 coupled, the carriage 20 is this by the web cutting and when applying the tapes 18 dragged along. The clutch boiler 21 is operated by a pneumatic Piston-cylinder unit 22 actuates it in an adapted bore in one on the carriage 20 attached coupling piece 23 moves. The circular knife 16 is open the carriage 14 also towards the carriage 20 by means of a piston-cytinder unit 24 movably mounted so that it can be cut against one on the carriage 20 attached counter roller 25 can be moved. To apply the adhesive tapes 18 it is moved back into an inactive position at a distance from the counter roller 25.

The components of the two adhesive tape applicators 17, 19 are approximately mirror images arranged to the track level. Each tape applicator 17, 19 contains one Supply roll 26 from which the adhesive tape 18 is pulled off and from guide rolls 27, 28 is led to the railway level. For pressing the respective adhesive tape 18 against the web 4 serve pinch rollers 29, 30 which are spaced apart are. Between the two pinch rollers 29, 30 is a tear-off blade 31 for Cutting the respective adhesive tape 18 stored. Both front pinch rollers 29 of a carriage 14, 20 are by means of an associated piston-cylinder unit 32 pivoted away from each other. When swiveling a pinch roller 29 the course of the adhesive tape 18 changes between the roller 28 and the pinch roller 30 so that the adhesive tape 18 is severed by the tear-off blade 31. The rear one Pinch roller 30 of the carriage 14 is additionally on together with the tear-off blade 31 a swivel plate 33 can be swiveled back and forth about an axis 34 to the web plane stored. A piston-cylinder unit 35 engages on the swivel plate 33, from which the pinch roller 30 against the pinch roller 30 of the other carriage 20 are placed can. The tear-off blade 31 is located in the setting position shown in FIG. 5 of the carriage 14 at a short distance from the adhesive tape 18, so that the adhesive tape 18 is severed when the front pinch roller 29 is pivoted back.

As can be seen from the view against the web running direction according to FIG. 4, this extends lower holding element 8 on both long sides of the device up to the maximum Web width, which corresponds approximately to the width of the upper holding element 7. The same applies to the lower leg of the swivel beam 13 of the web separator and Adhesive tape application device 12 on which the carriage 14 is mounted. Both carriages 14, 20 with the adhesive application devices 17, 19 can thus over the maximum web width be moved out into lateral parking positions. On one long side is in the Area of the adhesive tape application length thus extended outside the maximum Web width a plate 36 aligned with the web plane, against which the Pinch rollers 29, 30 of the tape applicators 17, 19 at the beginning of the tape application are movable. As in the present exemplary embodiment, there are two adhesive tape applicators 17, 19 available for double-sided tape application, so the pinch rollers 29, 30 against each side at the beginning of the tape application of the sheet 36 moves. The beginning of the adhesive tapes 18 is so when applying the adhesive tape first glued to the sheet 26, then the tape applicator moves 17, 19 to the other side (from left to right in FIG. 4) and pulls the Adhesive tapes 18 from the supply rolls 26. The one for removing the adhesive tapes 18 necessary train is not from the sensitive web 4, but from the fixed sheet 36 added. Not shown in the drawings separating knife arranged between the sheet 36 and the upper holding element 7, of which the adhesive tapes 18 after application immediately next to the holding element 7 are severed.

As a further element, the splicing device 5 contains a web transport device 37, by means of which a web start is taken up by a full winding roll 1 on its circumference and can be transported up to the area of the holding device 6. Preferably, the web transport device 37 consists of a suction pipe 38, which on free end of two side pivot levers 39 is freely rotatable. The Suction pipe 38 is connected to a vacuum blower and points to it Extend the suction openings to accommodate the start of the web of a new winding roll 1 and hold. The pivot levers 39 are designed and pivoted, that the suction tube 38 on the one hand moves against the circumference of a full winding roll 1 on the other hand, by the space between the holding device 6 and the swung-back web separator and tape applicator 12 in Web erection can be moved past the holding device 6.

On the guide roller 10 arranged behind the splicing device 5 there is a clamping device 40 is arranged with which the end of a running web 4 on the guide roller 10th clamps to hold it in place.

FIGS. 6 to 15 show the individual steps for carrying out a web split shown:

Figures 1 and 6 show the splicing device 5 in its rest position, while the Web 4 is unwound from the winding roll 1, 41. The web separator and tape applicator 12 is pivoted back, the suction pipe 38 is in a Parking position, either below the holding device 6 (Figure 6) or above the Holding device 6 (Figure 15). The web clamping device 40 is inactive. Lane 4 is running deflected by the guide rollers 9, 10 at a short distance on the holding surfaces of the Holding elements 7, 8 over.

Is the winding roll 1 except for a residual roll 41 with a small number of paper layers unwinding, the unwinding process is slowed down. The stationary web 4 will clamped to the guide roller 10 by the clamping device 40. The two carriages 14, 20 are located on one side next to the web 4 in that shown in Figure 4 Position. After the two holding elements 7, 8 by switching on the suction air are activated, the bar 13 pivots against the holding device 6, the in Carriage 14 mounted against it against carriage 20 stored in holding device 6 emotional. In the pivoted-in position, the two legs of the beam 13 clamp additionally the web 4 on the holding elements 7, 8 firmly. The two carriages 14, 20 are coupled to each other by means of the coupling bolt 21, and the cutting knife 16 is moved against the counter roller 25. Then the two slides 14, 20 with the activated knife 16 across the web width, the web 4 severed between the two holding elements 7, 8. The two tape dispensers 17, 19 are inactive, so that only cut, but no adhesive tape is applied. During the separation process, the carriages 14, 20 moved so that the cutting knife 16 first separates the tensioned web 4. Then the coupling pin 21 moves into the separation gap between the two Lanes and moves through the cut. In the illustration according to FIG. 5 the two carriages 14, 20 are moved from top to bottom when cutting. To cutting the web 4, the slides 14, 20 move back into their Rest position next to web 4 (Figure 7).

Then the upper one, which is closer to the unwinding device Holding element 7 inactivated by switching off the suction air. As in Figure 8 shown, the bar 13 is pivoted back into its rest position. After that the end of the web connected to the remaining roll 41 by turning the generator backwards pulled out of the splicing device 5, and the residual roll 41 is removed from the Unwind stand removed. The end of the running web 42 will continue from this active lower holding element 8 held. Then a new winding roll 1 in the Unwinding frame hung in such a way that its start 43 is exactly in the range of motion of the suction pipe 38 is positioned.

The suction pipe 38 is then from its rest position against the full Winding roll 1 pivoted while the suction air inside is switched on (Figure 9). The beginning of the path 43 is sucked in by the suction pipe 38 and at the latter Lateral surface held. Then the winding roll 1 in the unwinding direction rotated, the freely rotatably mounted and abutting the winding roller 1 Suction tube 18 rotates and coils a certain length of web. The winding roll 1 is stopped again when a web length is wound on the suction pipe 38, the at least the movement distance of the suction pipe 38 into the lowered position corresponds behind the web holding element 6.

Then the suction pipe 38 is pivoted down behind the web holding device 6 (Figure 10). When swiveling, the web 43 wound on it becomes again unwound, with the suction tube 18 in the end position still at least 1.5 layers entwine. After the upper holding element 7 by switching on the suction air has been reactivated, the bar 13 pivots again against the holding device 6 (Figure 11). As described above for FIG. 7, the path start 43 is now the new winding roll 1 along the same cutting line between the two holding elements 7, 8 severed. Then the bar 13 swings back into its Rest position so that the separated web start behind the holding element 7 on the Suction tube 38 can be wound. The suction pipe 38 is used for winding its underside on a drive roller 44 indicated in Figure 12, of which it is rotated.

After the separated web start is wound up, the web start 43 becomes the new winding roll from the upper holding element 7, the end of the running web 42nd held by the lower holding element 8. The two web ends are located without overlap in the web level directly one above the other. The beam 13 pivots now - as shown in Figure 13 - again against the holding element 6, the two cars 14, 20 with the two tape applicators 17, 19 in their Starting position on the sheet 36 moved (left in Figure 4). The two tape applicators 17, 19 are now activated by the pinch rollers 28, 29 of the two Carriages 14, 20 can be moved against each other. The two coupled cars 14, 20 then drive across the working width (from left to right in Figure 4), an adhesive tape 18 is first placed on both sides of the sheet 36 applied. The train occurring when pulling off the supply rolls 26 Adhesive tapes 18 is received by the sheet 36 on which the two Beginnings of the tapes 18 are glued. After leaving the sheet 36 is on an adhesive tape 18 is applied to each side of the web. When applying the adhesive tapes 18 is the cutting knife 16 inactivated, that is pivoted back. By the order in each case an adhesive tape 18 on each side of the web, the two are immediately next to each other located web ends on both sides of the web.

The gluing process is carried out during the backward movement of the two carriages 14, 20 carried out. Here, the coupling pin 21 now moves into the separation gap between the two webs 42, 43, then the adhesive tapes 18 applied to the front and back of the webs 42, 43.

Due to the sufficiently large distance between the coupling pin 21 and the Adhesive tape applicators 17, 19 can have the two edges of the webs 42, 43 again so close that the gluing can be carried out properly.

When the two carriages 14, 20 arrived on the other side of the device are, the first two pinch rollers 29 are pivoted back, the Adhesive tapes 18 severed from the blades 31. A separates at the start page separating knife arranged between the sheet and the holding element 7 outside the web width through the two tapes 18 stuck together.

After the two web ends have been glued, the suction air of the suction pipe 38 becomes switched off, the bar 13 is pivoted back into its rest position, the two Holding elements 7, 8 are deactivated and the clamping device 40 is released (FIG 14). All elements of the splicing device 5 are in their rest position, so that unwinding of the new winding roll 1 can be started.

An alternative rest position for the suction pipe 38 is shown in FIG. The Suction pipe 38 is pivoted up so far that it is in the area above the Holding device 6 and the web cutting and tape application device 12 is located. This position has the advantage that an operator can easily remove the remainder of the web can remove the suction tube 38 to prepare it for the next splicing process. After removing the remainder of the web, the suction pipe 38 can be in this position stop or lowered into the other rest position behind the holding device 6 until the next role change is due.

Figures 16-18 are the preferred construction and operation Embodiment shown with a two-part carriage 14. The one in FIG enlarged and shown in Figure 18 in a plan view carries as a web cutting device two separating knives 16, 45 and two as tape applicator Adhesive tape applicators 17, 19. The structure of the carriage 14 with the attached Aggregates are shown in more detail in FIG. 18:

The carriage 14 contains a two-part base plate, the two parts 46, 47 are rigidly connected to one another via a bridge 48. Outside the area of Bridge 48, the two parts 46, 47 are separated from one another by a slot 49, which is in the swiveled-in working position of the web separating and adhesive tape application device 12 is located in the area of web level 4. The two as circular knives trained separating knives 16, 45 are located directly next to the bridge 48 on the part 46 movably mounted in the direction of part 47 by means of a piston-cylinder unit 24. Each of the two circular knives 16, 45 can thus be cut against one on part 47 attached counter roller 25 are moved. To apply the adhesive tapes 18 the circular knives 16, 45 in an inactive position at a distance from the counter rollers 25 moved back.

The components of the two adhesive tape applicators 17, 19 are approximately mirror images arranged to the level of web 4. Each tape applicator 17, 19 contains a supply roll 26 from which the adhesive tape 18 is peeled off and from guide rolls 27, 28 is led to the railway level. To press the respective adhesive tape 18 against the web 4 serve pinch rollers 29, 30 which are arranged at a distance from one another. Between the two pinch rollers 29, 30 is a tear-off blade 31 for Cutting the respective adhesive tape 18 stored. Both front pinch rollers 29 of a carriage part 46, 47 are by means of an associated piston-cylinder unit 32 pivoted away from each other. When swiveling a pinch roller 29 the course of the adhesive tape 18 changes between the roller 28 and the pinch roller 30 so that the adhesive tape 18 is severed by the tear-off blade 31. The rear one Pinch roller 30 on the carriage part 46 is in addition together with the tear-off blade 31 a swivel plate 33 can be swiveled back and forth about an axis 34 to the web plane stored. A piston-cylinder unit 35 engages on the swivel plate 33, from which the pinch roller 30 against the pinch roller 30 of the other carriage part 47 can be. In the position shown in Figure 18 is the Tear-off blade 31 of the carriage 14 at a short distance from the adhesive tape 18, see above that the adhesive tape 18 is severed when the front pinch roller 29 swings back becomes.

The carriage 14 is mounted in the swivel beam 13 so that when it swivels against the holding elements 7, 18 of the carriage part 47 in the space moved between the two holding elements 7, 8. Is in the swiveled position the carriage part 46 on one side of the railway, the carriage part 47 on the other Web side, as shown in Figure 17. The cutting edges are in this position of the two knives 16, 45 when pressed against the respectively assigned counter roller 25 moved through the plane of the web, therefore the web 4 is moved when the Slide across the web width of the activated circular knife 16, 45 cut.

Allow the two knives 16, 45 arranged on both sides of the fixed bridge 48 so, the web 4 in both possible directions of movement of the slide 14th sever. The respective circular knife 16, 45 in the direction of movement becomes activated so that the subsequent bridge 48 can move through the cut.

A web splice becomes essentially in the embodiment according to FIGS. 16 to 18 performed with the steps shown in Figures 6 to 15. Therefore, only the essential steps and changes are described below compared to this procedure:

If the winding roll 1 is unwound except for a remaining roll, the first Unwinding slowed down. The stationary web 4 is from the clamping device 40 clamped to the guide roller 10, and the two holding elements 7, 8 are by Activation of suction air activated. Then the bar 13 pivots against the Holding device 6, the carriage 14 being on one side next to the track 4.

When swiveling the carriage part 47 moves into the space between the two holding elements 7, 8, as shown in Figure 17. The two legs of the Beam 13 clamp the web 4 additionally to the holding elements 7, 8.

Then the carriage 14 with the activated cutting knife 45 across the Web width moved and the web 4 cut. So that the bridge 48 through can move the cut, the movement of the carriage 14 takes place in the illustration 18 from bottom to top. When cutting are the two tape dispensers 17, 19 inactive, no adhesive tape 18 is applied.

After the upper holding element 7 has been inactivated, the bar 13 is returned to its rest position is pivoted, and the remainder roll is from the unwind 3 away. After hanging a new winding roll 1 in the unwinding frame 3 the suction tube 38 of the web transport device 37 against the full winding roll 1 pivoted while the suction air inside is switched on. On the Suction tube 38, the web start is wound up in a web length that is at least the Movement distance of the suction pipe 38 into the lowered position behind the web holding device 6 corresponds.

Then the web start of the new winding roll 1 is behind the web holding device 6 transported by swiveling the suction pipe 38. Doing so will web 4 wound on him wound down to a few layers.

After the upper holding element 7 is reactivated by switching on the suction air the bar 13 pivots again against the holding device 6. The beginning of the path The new winding roll 1 will be along the same cutting line between the two Holding elements 7, 8 severed by the carriage 14 with the activated Circular knife 16 is moved in the opposite direction across the web width; in Figure 18 of top down. The bridge 48 moves behind the active one again Cutting knife 16 through the cut. It is therefore not necessary to forward the carriage 14 the second cutting process to return to the original web side.

The new path start of the new winding roll 1 thus created is from the upper Holding element 7, the end of the running web from the lower holding element 8 held. The two web ends are located in the web plane without overlap right next to each other. Then the bar 13 pivots again Holding element 6, the two tape applicators 17, 19 are activated. For this purpose, the pinch rollers 28, 29 of the two carriage parts 46, 47 against each other emotional. The carriage 14 then travels across the working width (in FIG. 18 from bottom up), an adhesive tape 18 is applied to each side of the web. At the Applying the adhesive tapes 18, the separating knives 16, 45 are deactivated, that is, in one retracted position. The bridge 48 moves in front of the web ends connecting application of the adhesive tapes 18 through the space between the both ends of the web. Also for applying the adhesive tapes 18 is no empty run of the Wagens 14 required.

When the carriage 14 has arrived on the other side, the first two Pinch rollers 29 pivoted back, the tapes 18 from the blades 31 severed. The suction air of the suction pipe 28 is switched off, the bar 13 swung back into its rest position. After the two holding elements 7, 8 are deactivated and the clamping device 40 has been released, there are all elements the splicing device 5 again in its rest position. It can then be used with the Unwinding of the new winding roll 1 can be started.

Claims (12)

1. Apparatus for connecting the end of an outgoing material web (42) to the web start (43) of a new full wound reel (1) when unwinding material webs (4), in particular paper or board webs, comprising a device (16) for severing the web (4), a holding device (6) for holding the end of the outgoing material web (42), which device is arranged to be stationary on one side of the outgoing material web (4) and has two holding elements (7, 8) which are arranged at a distance from each other in the web running direction, comprising a web transport device (37) for holding the web start (43) of the full wound reel (1) at its circumference and for transporting the web start (43) until it is behind the region of the holding device (6), and comprising an adhesive tape applying device (12) which is mounted on the other side of the web such that it can be moved towards the holding device (6), characterized in that, on the other side of the web, a web severing and adhesive tape applying device (12) is mounted such that it can be moved against the holding device (6), contains a carriage (14) which can be moved transversely over the working width and contains a severing knife (16), preferably a circular knife, and an adhesive tape applicator (17), it being possible, during the movement of the web severing and adhesive tape applying device (12) against the holding device (6), for the cutting edge of the severing knife (16) to be moved through the plane of the web into the interspace between the two holding elements (7, 8) and for the holding elements (7, 8) to he activated individually.
2. Apparatus according to Claim 1, characterized in that behind the holding device (6) there is arranged a device (40) for clamping the outgoing web (42) firmly.
3. Apparatus according to Claim 1 or 2, characterized in that the two holding elements (7, 8) are suction boxes, whose wall facing the web (4) has suction openings (11) as a holding surface, the holding surfaces extending parallel to the web (4).
4. Apparatus according to Claim 3, characterized in that the web severing and adhesive tape applying device (12) contains a beam (13) which is mounted such that it can be pivoted, is open towards the web (4) and in which the carriage (14) is mounted.
5. Apparatus according to Claim 3 or 4, characterized in that between the holding elements (7, 8) of the holding device (6) there is arranged a further carriage (20) which can be moved transversely over the working width and which bears a further adhesive tape applicator (19).
6. Apparatus according to Claim 5, characterized in that one of the carriages (14) has a traction drive (15), and the other carriage (20) can be coupled to the first carriage (14).
7. Apparatus according to Claim 3 or 4, characterized in that the carriage (14) comprises two parts (46, 47), which are rigidly connected to each other by a bridge (48), and in that in each case a severing knife (16, 45) is arranged on either side of the bridge (48).
8. Apparatus according to Claim 7, characterized in that an adhesive tape applicator (17, 19) is arranged on each of the two parts (46, 47) of the carriage.
9. Apparatus according to one of Claims 1 to 8, characterized in that the adhesive tape applicator (17, 19) can be moved transversely with respect to the web running direction and, at least on one long side of the apparatus, until beyond the maximum web width, and in that, in the region of the lengthened travel, outside the maximum web width, there is arranged a metal sheet (36) which is aligned with the plane of the web and against which the adhesive tape applicator (17, 19) can be moved at the start of the adhesive tape application.
10. Apparatus according to one of Claims 1 to 9, characterized in that the web transport device (37) contains a suction pipe (38), which is rotatably mounted at the end of two lateral pivoting levers (39) and, by means of the pivoting levers (39), can be moved from the circumference of a full wound reel (1) until behind the web holding device (6).
11. Apparatus according to Claim 10, characterized in that the suction pipe (38) is freely rotatably mounted at the free end of the pivoting levers (39).
12. Apparatus according to one of Claims 1 to 11, characterized in that, in the web running direction, upstream and downstream of the holding device (6), in each case a guide roller (9, 10) is arranged, by which the web (4) is led past the holding elements (7, 8) at a short distance.

Images