DE4330717C2 - Device for changing film rolls and method for operating one - Google Patents

Description

The invention relates to a device for changing Film rolls according to the preamble of claim 1.

Such film roll changing devices are particularly needed for pallet wrappers. Pallet wrappers are used to Pallet stacked goods, d. H. the pallet load, furthest going to pack by machine. A film of unwrapped a film roll and for example in ver different types of banding wrapped around the pallet load. Pallet wrappers can essentially be divided into two classes organize. In the first system, the pallet remains with the Pallet load stationary in the pallet winder while moving the film roll on a rotor arm around the pallets cargo moved around. The second system is the Film roll stationary on the pallet winder, the Pallet with the pallet load on a turntable of the Pallet wrapper rotates and the film from the film roll subtracts in which the pallet load is wrapped. In the As a rule, the film unwinding device can be moved in height or - adjustable storage, so that the pallet load screw lines can be wrapped with the film. That is why required because the web width is usually around 500 mm is less than the dimensions of the pallet load.

Common to both systems is the disadvantage that after Ver need a film roll of the pallet winder over a country period to replace a used film roll a new film roll stands still. During this standstill  duration is by an operator of the core of the used film roll removed from the mandrel and a new film roll from a stock on the mandrel put on. Then the film start of the new film roll by the operator via various deflection rollers and / or brake rollers of a film unwinding device towards the Pallet load guided and fastened there or in one Clamp clamped, which also during the film start of the normal work cycle. Only then can the pa Lathe winder be put back into operation and with the Continue packing the pallet load. This silence Lifetime of the pallet winder for changing the film rolls as well as the manual change of film rolls increase the operating costs of the pallet wrapper considerably. Also incorrect operation of the pallet wrapper is caused by the Operating personnel are not excluded.

Similar problems exist with all other devices where film or sheet material from supply rolls deducted and processed or consumed so that in time intervals a new roll of material Be made available and brought into the unwinding position got to. The present invention is therefore not limited to that Use in film rolls limited, but equally also applicable to all other web material rolls. To that extent the term "film roll" in the present Be spelling and the claims used only as an example.

From US-PS 41 31 206 is a device for changing Paper rolls known for a rotary printing press, at which the paper rolls over both longitudinal and transverse bare wagons lying in the takeover area of the rotary printing presses are lifted vertically there and by one of several at sternwal zen worn horizontal thorns. The Roller cores are placed in height-adjustable trough carriers, which  attached to one of the trolleys, recorded and by swiveling the trough carrier inwards onto the second, longitudinally movable car thrown away and trans ported, with soft also the new paper roll is ported. Such a device is not suitable for the change of vertical film rolls.

From EP 0 426 308 A1 it is per se on a carrier direction for the spool of a film roll known Sleeve core by engaging in its upper and lower end Clamp the adapter vertically.

EP 070 950 A1 describes an internal gripper as a load, especially roller jack known, which has an expanding mandrel has, on the expanding mandrel housing a radially projecting Seat and a spreader in its expanding mandrel housing direction are arranged, at least from an axial movable expansion cone and radially attached to it movable spreading teeth.

The invention has for its object a Wechselvorrich procurement of the type mentioned at the outset, for Processing vertical standing film rolls serves and with little constructive effort and fast operation only short Pallet winder downtime during filming role changes and manual interventions during the Largely makes film roll change superfluous.

This object is achieved with the features of Claim 1 solved. This enables pallet space by relative movement between this and the foils roll in a horizontal plane or in a helix can be wrapped with a vertical axis and when changing the film roll does not open up over its entire width must be lifted.  

According to an advantageous development of the invention Sleeve core taker or the film roll holder each as Cones formed the one, for example by means of compressed air has stretchable, annular cuff. To capture the The roll of the film roll holder becomes the pin inserted from above into the sleeve core and the cuff stretched, for example, by exposure to compressed air. The core of the tube or the film roll is released after Transport by a corresponding automatic or assisted contraction of the cuff or the like medium. Any other suitable clamping device can also be used.

So that the pin in the sleeve core before the expansion of the man cuff can be positioned centrally, are preferably on the Tenons protruding from the lateral surface of the tenon, spring-loaded noses distributed circumferentially arranged.

According to a further feature of the invention, the mandrel back has traction device an annular, stretchable sleeve or the like. Clamping means, e.g. B. a square with a side out protruding, spring-loaded ball catch, which in one Recess of a foot portion of the mandrel are receivable. This configuration of the mandrel retraction device is one easy and safe removal of the mandrel from the core the used film roll possible.

The mandrel retraction device with the clamping is advantageous center rotatable about its axis and thereby the mandrel on or of a film roll holding arm of the film unwinding device is rotatable, definable or releasable.  

The fact that the mandrel at a foot portion of a conical thickening is included and made in a head portion the outer surface of the mandrel protruding under spring tension has standing circumferentially distributed noses, is a ensure that the film roll is centered on the mandrel accomplishes.

In an advantageous development, the film roll trans porter also a film welding device for producing a weld between the beginning of the film on the new film roll and the film end of the used film roll and a Cutting device for cutting the film end between the film sealing point and the used film roll exhibit. This is also with regard to the foils practically fully automatic change of foils roll possible, the only comparatively short standstill times of the machine consuming the foils. For example, using a sensor recognized that on the core of the existing and almost used film roll only a few layers of the film available. With the appropriate control the pallet winder stopped, the film transporter with one new film roll approached the film unwinding device ren, the beginning of the new film roll with the end of the film if necessary, the used film roll is automatically welded, if necessary, the film end between the Foil welding point and the used foil roll through cut, the new film roll is positioned on the mandrel and the core of the used film roll with the Fo lienrolltransporter to a collection or storage station transported. At the collection or storage station, the Film transporter automatically opens a new film roll and puts down the core of the used film roll, whereupon the change process can be repeated.  

The film sealing device has an advantage in particular the retractable and extendable seal stamp, the one on the Foil unwinding device arranged seal stamp stop assigned.

This ensures a safe production of the film sealing point ensures that you during the film roll change gel stamp and the seal stamp stop directly to each other lie adjacent opposite and between the two the film end the used film roll and the film start of the new one Foil roll are arranged.

A simple construction of the cutting device is that it has holder arms pivotable about an axis of rotation, a hot wire is stretched between the free ends. Of it may also be advantageous instead of the hot wire a mechanical cutter, e.g. B. with one to use a blade actuated by a linear cylinder.

According to another advantageous, independent feature of Invention, is a removable Fo on the new film roll Line clip with two stick out of the new film roll the spring arms can be fixed and between the two ends of the Unrolled film start of the new film roll fixable. There that the beginning of the film passes through the film holding clip fixed like a protrusion from the new film roll, can the beginning of the new film roll and the film end of the used film roll simply during filming roll change by moving the film roll transporter relative to the film unwinding device parallel to each other arranged and welded together.

The film holding clip advantageously has an interrupted one Spring washer, which is due to compression in the core of the sleeve Film roll can be clamped, the spring arms from the ends  of the spring washer crossing each other approximately over the film roll radially or tangentially outwards from the film roll stand out. This makes it easy to attach the foils holding clip on the sleeve core as well as a mechanical one Remove the film clip from the core without further possible.

According to another development of the invention, the Foil bracket a substantially U-shaped bracket on, whose U-leg on the inner wall of the sleeve core and the outer surface of the new film roll can be clamped, the spring arms crossing each other like scissors protrude tangentially outwards from the new film roll.

It has proven advantageous that the spring arms about 40 cm ± 10 cm from the center of the film roll one normal diameter up to about 30 cm extend outwards. If so-called large rolls with a diameter of 50 cm or more are used is the use of foils Retaining clips with longer spring arms required.

There is also an advantageous embodiment of the invention in that the spring arms starting from a first section for detachable fastening of the film holding clip to the new one Film roll in a second section and a fourth Section run essentially parallel to one another, in a middle third section cross each other and in a fifth section with gripping claws or the like Fixation of the beginning of the film are provided.

A simple way to release the beginning of the film through the Fo Line clip and removal of the film clip is that the film transport carriage has a gripper for actuating the film holding clip with which the  Spring arms to release the beginning of the film expandable and the Fo lien retaining clip is removable from the new film roll.

The gripper acts z. B. in a range between Spring washer or bracket and the crossing point on the Spring arms on. Are the spring arms in this area When the gripper is pressed together, the gripping claws move Spring arms apart, which is accompanied by the spring ring is compressed and the film holding clip easily out of the Sleeve core is removable.

The film roll changing device according to the invention is in advantageously controlled or operated according to claim 19. This allows z. B. a pallet winder also for foils role changes largely without operating personnel for short Operate downtimes. It just has to take care of it be that film rolls in the collection or storage station are available in sufficient numbers, which if necessary with a Foil holding clip for fixing the protruding foil beginning are equipped. The film roll transporter in the collection or storage station released film holding clips collected in a container and reused. Likewise, the core of the used film rolls collected and used again.

In the following, reference is made to the drawing management examples of the invention explained in more detail.

Show it:

Fig. 1a, b 2a, b 3 a schematic representation of a b fiction, modern film roll exchange device in side view and plan view during various phases of the Dener change operation according to one embodiment,

Fig. 4a, b, the enlarged view of a fiction, modern film roll holder in side view,

Fig. 5a-c the mandrel and a mandrel return zugsvorrichtung invention in side view during various phases of the change operation,

Fig. 5d, the plan view of the mandrel and the Folienrol lenhalterarm an inventive film roll changing device,

Fig. 6a, b in plan view and side view of a first embodiment of a film holding clip according to the invention, and

Fig. 7 shows a second embodiment of a film holding clip according to the Invention in plan view.

In Figs. 1 to 3 in three working phases of an apparatus 10 is shown for changing foil rolls 17, 38, as for example, for Pallet finds application to advantage. To change a used film roll 17 stored on the film unwinding device 12 or after its use of the remaining core 18 against a new film roll 38 , a film roller 14 designed as a carriage or carriage is horizontally and between a collection or storage station 15 and the film unrolling device 12 can be positioned vertically relative to the latter.

The film unwinding device 12 has a film roller arm 64 which carries a vertically arranged mandrel 16 . The mandrel 16 serves to support the first film roll 17 , the core 18 of which can be placed on and removed from the mandrel 16 . A brake roller 24 and two deflection rollers 20 , 22 are also provided on the film unrolling device 12 . The film of the film roll 17 wraps around the brake roller 24 and the deflection roller 22 . A sealing stamp stop 26 is arranged between the two deflection rollers 20, 22 .

The height-adjustable film unrolling device 12 is, for. B. either set up stationary in a pallet winder when the goods to be packaged is positioned on a rotary table assigned to the device 12 , or else on a rotor arm of a pallet winder, by means of which the film unwinding device 12 is moved around the goods to be packaged with the deduction of the film web . Towards the end of the film web, the remaining core 18 must be exchanged for a new film roll 38 while the winding process is interrupted.

For this purpose, a film roll transporter 14 of the type according to the invention is used. The film roll transporter 14 carries, on an arm 48, a core removal unit 30 for the core 18 of the used film roll 17 on the film unwinding device 12 and a film roll holder 31 for the new film roll 38 . A mandrel retraction device 28 for the mandrel 16 is fastened in the illustrated case below the sleeve core remover 30 to another arm of the film roll transporter 14 . The mandrel retraction device 28 and the sleeve core taker 30 can be displaced relative to one another in the vertical direction with respect to a common geometric axis 33 . Laterally offset from the film roll holder 31 , the film roll transporter 14 carries a film welding device 39 with at least one or more sealing stamps 40 , 42 arranged vertically one above the other. Furthermore, in the case shown, a cutting device 36 is attached to the film transporter 14 , which has a holding arm 37 which is arranged at a distance from one another on an axis of rotation 35 and can be pivoted with it. Between the free ends of the holding arms 37 , a heatable wire for severing the film end 44 of the used film roll 17 is stretched. For this purpose, the cutting device 36 is pivoted between the sleeve core taker 30 and the film roller holder 31 through onto the film end 44 .

A gripper 34 is also arranged on the arm 48 of the film roll transporter 14 , by means of which the spring arms 70 , 72 of a film holding clamp 32 can be acted upon on the new film roll 38 . The film holding clip 32 is placed on each new film roll 38 . The beginning of the film 46 is clamped between the head ends of the spring arms 70 , 72 , so that it protrudes like a flag from the new film roll 38 .

The sleeve core collector 30 and the film roll holder 31 are shown in FIGS. 4a and 4b are formed as on the arm 48 vertically disposed below pin 49. An expandable, annular sleeve 56 provided in the head region expands radially when pressurized with air and clamps the core 18 of the used old film roll 17 or the full new film roll 38 . In the upper section, the pin 49 has a plurality of lugs 50 , 52 , 54 which protrude from its lateral surface 55 and are under spring tension. The lugs 50 , 52 , 54 are arranged circumferentially distributed on the lateral surface 55 .

According to FIGS. 5a to 5d, the mandrel retraction device 28 has an annular, stretchable sleeve 66 which can be received by a recess 67 in a foot section 57 of the mandrel 16 . The sleeve 66 can be rotated about a central axis and the mandrel 16 can be rotatably fixed or detached on the film roll holding arm 64 . In the event that the occurring forces exceed certain values, a positive connection between the mandrel 16 and the mandrel retraction device 28 can also be seen in place of the stretchable sleeve 66 . For this purpose, a square can be provided which engages in a corresponding recess in the lower part of the mandrel 16 . One side of the square has an outstanding, spring-loaded ball catch for fixing the mandrel 16 , which is designed similarly to the holding means of a nut / ratchet connection.

At the foot portion 57 , the mandrel 16 is surrounded by a conical thickening 63 and has in a head portion 45 from its outer surface 65 protruding, under spring tension standing, circumferentially distributed lugs 58 , 60 , 62 .

The attachable to a full new film roll 38 Folienhal teklammer 32 has according to a first embodiment according to Fig. 6a, b as a clamping element for clamping fixation on the film roll 38 on an interrupted spring ring 68 . The Fe derarme 70 , 72 extend from the ends of the spring ring 68 above the film roll 38 crossing each other approximately radially or tangentially to the film roll 38 to the outside.

According to a further embodiment according to FIG. 7, the film holding clip 32 as a clamping element has a substantially U-shaped holding bracket 90 , the U-legs of which can be clamped against the inner wall 89 of the sleeve core 18 and the outer surface 91 of the second film roll 38 . The spring arms 70 , 72 protrude from one another in a scissor-like manner approximately tangentially above the outwardly facing film roll 38 .

Common to the two embodiments of the film holding bracket 32 is that it has a clamping element for clamping fixing to the new film roll 38 in a first section 74 , to which the two spring arms 70 , 72 connect laterally. The spring arms 70 , 72 are aligned approximately parallel to one another in a second section 76 and in a fourth section 80 and intersect in a central third section 78 at an intersection 79 . At a front fifth section 82 of the spring arms 70 , 72 gripping claws 84 , 86 or the like are provided for clamping the film start 46 of the new film roll 38 .

According to the first embodiment, the spring arm 72 has a first bend 92 between the second section 76 and the third section 78 , the spring arm 70 has a first bend 96 between the third section 78 and the fourth section 80, and both spring arms 70 , 72 each have a second bend 94 , 98 between the fourth section 80 and the fifth section 82 .

The spring arms 70 , 72 are arranged vertically offset from one another on the clamping element. The gripping claws 84 , 86 or the like are essentially at right angles directed downwards from the fifth section 82 of the spring arms 70 , 72 . With a length of approximately 40 cm ± 10 cm, the spring arms 70 , 72 extend outward from the center of the second film roll 38 .

A gripper 34 for actuating the film holding clamp 32 acts in a region 88 between the clamping element and the crossing point 79 on the spring arms 70 , 72 . By the action of the gripper 34 on the area 88 of the spring arms 70 , 72 these are spread in the fifth section 82 and the beginning of the film 46 of the second film roll 38 is released. With the spreading of the outer portions of the spring arms 70, 72 of the foil holding clamp 32 is simultaneously compressed, the spring ring 68 and can be independently drawn out of the sleeve core 18 of the second film roll 38 by means of the gripper 34 before winding begins.

The device 10 for changing the sleeve core 18 of the used film roll 17 against a new film roll 38 works as follows:
By means of a sensor on the film unwinding device 12 , it is determined that the film roll 17 has been used up and that only a few layers of film are left on the core 18 . The film consumer, e.g. B. the pallet winder stopped and, if necessary, the film unrolling device 12 in a basic position, in particular in the lower end position, driven. The film end 44 of the first film roll 17 is therefore still wound on the core 18 . In the collecting or supply station 15 there are a number of new film rolls 38 z. B. ready on a conveyor belt to be transported by means of the film roll transporter 14 to the film unrolling device 12 . Each new film roll 38 is provided with a film holding clamp 32 , which clamps the film start 46 by clamping, so that it protrudes from the film roll 38 in a flag-like manner over a length of approximately 30 cm. The Folienhal teklammer 32 is, depending on the embodiment either by means of the spring ring 68 in the sleeve core 18 or by means of the bracket 90 on the inner wall 89 of the sleeve core 18 and the outer surface 91 of the film roll 38 fixed.

The film roll transporter 14 moves up to a new film roll 38 that is ready so that the film roll holder 31 is positioned over the core 18 of the new film roll 38 . Then you lower the film roll transporter 14 or the film roll holder 31 so that the film roll holder 31 is immersed in the sleeve core 18 . According to an expansion of the sleeve 56, for example, by applying the same with compressed air, the new film roll is secured to the film roll holder 38 38th

The film roll transporter 14 is subsequently moved upwards and in the direction of the film unrolling device 12 until the core removal unit 30 is positioned above the core 18 of the first used film roll 17 .

Subsequently, the sleeve core remover 30 lowers and dips into the sleeve core 18 of the used film roll 17 . The sleeve 56 of the sleeve core remover 30 is stretched to fix the sleeve core 18 of the used film roll 17 . The almost empty core 18 of the used Fo film roll 17 and the new film roll 38 are now positioned one behind the other at the same height. At the same time, the mandrel retraction device 28 is raised and the sleeve 66 leads into the recess 67 of the foot section 57 of the mandrel 16 . After expansion of the sleeve 66, for example by exposure to compressed air and rotation of the Dornrückzugsvor direction 28 in any case in the region of the sleeve 66 about its axis, the mandrel 16 is released from the film roll holding arm 64 and pulled down from the core 18 of the used film roll 17 , while this from is held at the top by the sleeve core remover 30 .

Then the film roll transporter 14 is moved so that the film roll holder 31 with the new film roll 38 is arranged above the lowered mandrel 16 . The film start 46 of the new film roll 38 now runs almost parallel to the film end 44 of the used film roll 17 . The film welding device 39 is actuated to produce a film welding point 47 between the film start 46 and the film end 44 . For this purpose, the sealing stamps 40 , 42 are moved in the direction of the sealing stamp stop 26 and weld the film start 46 and the film end 44 to one another. The cutting device 36 is then pivoted about the axis of rotation 35 and cuts through the film end 44 between the film welding point 47 and the first film roll 17th During the cutting process, the film end 44 is held in a defined position by being in contact with the deflection roller 20 . After severing the film end 44 , the mandrel 16 is inserted into the sleeve core 18 of the new film roll 38 by lifting the mandrel retraction device 28 and the mandrel 16 is locked by rotating the sleeve 66 with the film roll holder arm 64 .

The gripper 34 on the arm 48 opens the film holding clamp 32 by exerting pressure in the area 88 , so that the spring arms 70 , 72 are opened and the film start 46 is released. By lifting the film transporter 14 into the upper position, the film holding clamp 32 is removed from the new film roll 38 .

The film roll transporter 14 is moved again in the direction of the collection or storage station 15 and the film roll holder 31 is positioned over the core 18 of a further film roll 38 . The gripper 34 opens and releases the film holding clip 32 for inclusion in a collecting container. The sleeve 56 of the sleeve core taker 30 is pulled together and releases the sleeve core 18 of the used film roll 17 for reception in another collecting container.

After consumption of the new film roll 38 , the control process of the film roll changing device starts from the beginning.

Reference list

10 film roll changing device
12 film unwinder
14 film roll transporters
15 collection or supply station
16 thorn
17 used film roll
18 core
20 pulley
22 pulley
24 brake roller
26 seal stamp stop
28 mandrel retraction device
30 core cores
31 film roll holder (for a new film roll 38 )
32 film retaining clip
33 axis
34 grippers
35 axis of rotation
36 cutting device
37 holding arm
38 new film rolls
39 Foil sealing device
40 seals
42 seals
44 slide end
45 head section
46 Start of slide
47 Foil sealing point
48 arm
49 cones
50-54 noses (under spring preload)
55 lateral surface
56 stretch cuffs
57 foot section
58-62 noses (under spring preload)
63 thickening
64 film roll holding arm
65 lateral surface
66 stretch cuffs
67 recess
68 spring washer
70 spring arm
72 spring arm
74 first section
76 second section
78 third section
79 crossing point
80 fourth section
82 fifth section
84 gripping claw
86 gripping claw
88 area
89 inner wall
90 holding bracket
91 outer wall
92 first turn
94 second turn
96 first turn
98 second turn

Claims (14)

1. Device ( 10 ) for changing from a sleeve core ( 18 ) provided film rolls ( 17 , 38 ), with a film roll device ( 12 ) having a mandrel ( 16 ) on which the film roll ( 17 , 38 ) can be placed and of which after consumption of a film roll ( 17 ) the empty core ( 18 ) is removable, with a relative to the Folienabrollvor direction ( 12 ) horizontally and vertically positionable film roll transporter ( 14 ) for the transport of the films roll ( 17 , 38 ) between a collection - Or storage station ( 15 ) and the film unrolling device ( 12 ), which has a core core remover ( 30 ) for the core core ( 18 ) of the used film roll ( 17 ) and a film roll holder ( 31 ) for a new film roll ( 38 ), characterized thereby is characterized in that the mandrel ( 16 ) is arranged vertically, that with the mandrel ( 16 ) a mandrel retraction device ( 28 ) during the roll change can be coupled or coupled in a non-positive or positive manner, since ß the core holder ( 30 ) and the film reel holder ( 31 ) on an arm ( 48 ) of the film reel transporter ( 14 ) are arranged in a hanging manner and can be raised or lowered and that the core holder ( 30 ) and the mandrel retraction device ( 28 ) to the axis of the core ( 18 ) are vertically adjustable against each other. 2. Apparatus according to claim 1, characterized in that the core take-off ( 30 ) and the film roll holder ( 31 ) each have expandable, for example an annular sleeve ( 56 ) or the like. 3. Apparatus according to claim 2, characterized in that on the pin ( 49 ) a plurality of protruding from its lateral surface ( 55 ), spring-loaded lugs ( 50 , 52 , 54 ) are arranged circumferentially distributed. 4. Device according to one of claims 1 to 3, characterized in that the mandrel retraction device ( 28 ) is an annular, expandable sleeve ( 66 ) or the like. B. has a square with a laterally projecting, spring-loaded ball catch, which can be received in a recess ( 67 ) of a foot portion ( 57 ) of the mandrel ( 16 ). 5. Device according to one of claims 1 to 4, characterized in that the mandrel retraction device ( 28 ) rotatable about a central axis and thereby the mandrel ( 16 ) on or from a film roll holder ( 64 ) of the film unwinding device ( 12 ) rotatably fixable or releasable is. 6. Device according to one of the preceding claims, characterized in that the mandrel ( 16 ) at its foot portion ( 57 ) is surrounded by a conical thickening ( 63 ) and in a head portion ( 45 ) from the lateral surface ( 65 ) of the mandrel ( 16 ) has outstanding, spring-loaded, circumferentially distributed noses ( 58 , 60 , 62 ). 7. Device according to one of the preceding claims, characterized in that the film transporter ( 14 ) has a film welding device ( 39 ) for producing a welding point ( 47 ) between the film start ( 46 ) of the new film roll ( 38 ) and the film end ( 44 ) the used film roll ( 17 ) and a cutting device ( 36 ) for severing the film end ( 44 ) between the film welding point ( 47 ) and the used film roll ( 17 ). 8. Device according to one of the preceding claims, characterized in that on the new film roll ( 38 ) has a removable film holding clip ( 32 ) with two spring arms ( 70 , 72 ) projecting from the new film roll ( 38 ) and between the ends of the spring arms ( 70 , 72 ) the unrolled film start ( 46 ) of the new film roll ( 38 ) can be fixed. 9. The device according to claim 8, characterized in that the film holding clip ( 32 ) has an interrupted spring ring ( 68 ) which can be clamped in the sleeve core ( 18 ) of the new film roll ( 38 ), the spring arms ( 70 , 72 ) of the ends of the spring ring ( 68 ) cross each other via the new film roll ( 38 ) and project approximately radially or tangentially outwards from the new film roll ( 38 ). 10. The device according to claim 8, characterized in that the film holding clip ( 32 ) has a substantially U-shaped bracket ( 90 ), the U-leg on the inner wall ( 89 ) of the sleeve core ( 18 ) and the outer surface ( 91 ) of the new film roll ( 38 ) can be clamped, the spring arms ( 70 , 72 ) projecting like scissors crossing each other projecting approximately tangentially outwards from the new film roll ( 38 ) and between them the film start ( 46 ) is clamped. 11. The device according to one of claims 8 to 10, characterized in that the spring arms ( 70 , 72 ) starting from a first section ( 74 ) for releasably fastening the Folienhal teklammer ( 32 ) on the new film roll ( 38 ) in a second section ( 76 ) and a fourth section ( 80 ) run essentially parallel to one another, cross each other in a middle third section ( 78 ) and in a fifth section ( 82 ) with gripping claws ( 84 , 86 ) or the like for fixing the beginning of the film ( 46 ) are provided. 12. Device according to one of claims 8 to 11, characterized in that the film transporter ( 14 ) has a gripper ( 34 ) for actuating the film holding clip ( 32 ) with which the spring arms ( 70 , 72 ) of the film holding clip ( 32 ) for release the beginning of the film ( 46 ) can be expanded and the film holding clip ( 32 ) can be removed from the second film roll ( 38 ). 13. The apparatus according to claim 12, characterized in that the gripper ( 34 ) acts in an area ( 88 ) between the spring ring ( 68 ) or bracket ( 90 ) and the crossing point ( 79 ) on the spring arms ( 70 , 72 ). 14. Method for operating a device according to one of the preceding claims, in which the film roll holder ( 31 ) arranged on the arm ( 48 ) of the film roll transporter ( 14 ) is lifted vertically with a new film roll ( 38 ) fixed to it and onto the film unrolling device ( 12 ) moved horizontally that the arm core ( 48 ) arranged core taker ( 30 ) above the core core ( 18 ) of the ver used film roll ( 17 ) is positioned, the core roll taker ( 30 ) lowers until the new film roll ( 38 ) and the core ( 18 ) of the used film roll ( 17 ) is at the same level, with the core pickup ( 30 ) immersed in the core ( 18 ) of the used film roll ( 17 ) and then the core ( 18 ) of the used film roll ( 17 ) the mandrel core remover ( 30 ) is fixed, the mandrel retraction device ( 28 ) is raised, the mandrel ( 16 ) by means of the mandrel retraction device ( 28 ) is pulled down out of the core ( 18 ) of the used film roll ( 17 ), then the film roll transporter ( 14 ) is moved horizontally until the second film roll ( 38 ) is positioned above the lowered mandrel ( 16 ) and the film end ( 44 ) the first film roll (17) and foil start (46) of the new film roll (38) are at least approximately parallel to each other, the foil welding device (39) for producing a weld (47) between the foil start (46) and the foil end (44) actuated If the film end ( 44 ) is cut between the welding point ( 47 ) and the first film roll ( 17 ) by means of the cutting device ( 36 ), the mandrel ( 16 ) in the sleeve core ( 18 ) of the new film roll ( 18 ) by means of the mandrel retraction device ( 28 ) 38 ) introduced, the new film roll ( 38 ) released from the film roll holder ( 31 ), the film roll transporter ( 14 ) raised vertically and horizontally in the direction The collection or storage station ( 15 ) is moved until the film roll holder ( 31 ) is positioned above a new film roll ( 38 ), the core ( 18 ) of the used film roll ( 17 ) is released by the core core remover ( 30 ), the film roll transfer Porter ( 14 ) is lowered and a film roll ( 38 ) is fixed to the film roll holder ( 31 ) in order to be ready for transport to the film unwinding device ( 12 ).