EP0949173B1 - Apparatus and method for automatic exchange of a film roll - Google Patents

Description

The present invention relates to a device and a Method for automatically changing film rolls.

In mass production of motor vehicles, the vehicles must be prepared for shipping so that they do no harm take, in particular that the paint through transport and Weather conditions is not affected. Be for the Customer transfer train journeys or ship transports necessary, you have the vehicles for this earlier with a wax protection layer covered, which removed before customer delivery again had to become. The residue-free removal of the protective wax was not only a labor-intensive job, but burdened also people and the environment because of the solvents used. That is why it has recently gone over to the bodies during transport through self-adhesive films too protect. Such films are usually made by hand peeled off a film roll and on the parts to be protected applied. It is also known, film rolls in a holder to arrange, and the removal of the film machine controlled perform. The replacement of such rolls of film proves This is very labor intensive. For example, must the film supply is constantly monitored on the film roll, so that upon reaching the end of the rolled film, the film roll can be exchanged. In this case, the consumed Film roll are removed and through the new roll of film be replaced. As the new roll of film usually not stored in the immediate vicinity of the Folienappliziervorrichtung this leads either to longer production interruptions, or for an operator to control the running film roll must constantly monitor, so that shortly before the end of Film roll the replacement can be prepared.

A device for loading and unloading paper rolls Printing machines is disclosed in DE-PS 591998. The device has in this case up and down movable support bearings. This up and down movable support bearings are with two superimposed lying support arms for the paper roll equipped. through The support bearing is a wound roll of paper from a Starting position can be brought into a working position, wherein also by means of the support bearing an expired paper roll from the Working position is removable.

The object of the invention is therefore to provide an automated Device for changing film rolls and a Method for changing film rolls, in which the replacement of film rolls over the prior art less is complicated and a production interruption can be avoided can. It also avoids the need for extra staff becomes the production process in terms of film roll change to monitor. This can be done to any Time all film roll changer are equipped to to make sure that the slide length for example a whole layer is sufficient.

This object is achieved by a device with the features of claim 1 and a method with the features of claim 11.

According to the invention is now a simple automatic change of film rolls without interruption of production possible because at Need an already held in the waiting position in the device Replacement roller (second film roll) in a simple manner can be brought into a working position in which the film is intended is removable from a roll of film (first roll of film). The device also comprises one with the means for Holder or connected to the process of the second film roll Ejector on, by means of which during the process the second film roll, the first film roll from the working position is removable. In addition, the device has a the first film roll can be brought into operative connection, drivable and / or braked dancer roller.

By appropriate selection of film roll sizes, it is possible an adaptation to an example during a Make layer required length of film. As is conventional was only possible, immediately at expiration or end of a Film roll provide a replacement roll or in the Insert changing device, provides the inventive Device is a great simplification. An operator can, within certain time limits, at any time the assembly the device according to the invention with a further Make film roll without doing the production process in in any way. The equipment can, for example during a working shift or between two working shifts or during the masking process. Further is the film roll change in a very simple manner substantially by means of a single movement of the exchange roller feasible because a used film roll by Removable roller procedure removable from working position and then the replacement roller in the working position can be introduced. A film roll change is particularly easy and mechanically reliable manner feasible. through the dancer roller provided according to the invention is at stripping the film from the film roll whose peel in a simple Determined manner, where necessary, the removal of the film by supports a corresponding rotational movement of the dancer roller can be. Furthermore, the dancer roller advantageously also drivable in a direction opposite thereto be such that a rewinding of peeled film means the dancer roller is possible. Due to the braking ability of the film roll a defined peeling of the film is ensured.

Advantageous embodiments of the invention are the subject the dependent claims.

Advantageously, the device according to the invention has a Lifting device for substantially vertical method a Pallet on which the second film roll, in particular on Rotatable support rollers, can be arranged on. By means of a Such lifting device, the second film roll in a simple Be brought into the working position. Further is by providing the rotatable Auflagerollen pulling off the beginning of the film for sticking to a fixing tube mentioned below facilitated.

Conveniently, the device has one with the pallet connected, pivotable ejection bracket for removing the first Film roll from the working position during the vertical process the second film roll on. Such a discharge bracket can in the stroke movement of the pallet up a to be replaced Remove film roll from its holder in a simple way, and in a subsequent downward movement due to its Swiveling on a new, held in the working position Film roll are passed.

According to a preferred embodiment, the pallet is on a Transport trolley positioned, which in such a frame the device is retractable that arranged on the pallet second film roll can be brought into the waiting position. By means of such a trolley it is easier Way possible to introduce a new film roll in the device. This can be done at any time during the Operation of the device, i. while peeling off film from the first roll of film, to be performed without the operation in any way impair. The dolly may have a number of roles, depending on Space can be made rotatable. Hereby is in a simple way a method of the trolley between a film roller bearing and the device for changing Film rolls possible.

Conveniently, to determine the position of the pallet provided on the trolley at least two centering pins. With such centering the pallet is suitable Way on the retractable into the device trolley positionable.

Conveniently, the device further comprises the first Film roll can be brought into operative connection measuring means, in particular a measuring wheel, for the measurement of withdrawn from the film roll film and signal generating means cooperating with the measuring means for outputting a signal to a control device of Means for triggering the lifting or method of the second Film roll on. This can easily the length withdrawn from the located in the working position film roll Slide to be determined. Upon reaching the end of the wound film, it is then possible, the old film roll to replace with a new roll of film. The measuring wheel can do this a suitable signal to the control means or directly to the Give lifting device.

According to a preferred embodiment is on the lifting device or the pallet a Fixierrohr attached to which a withdrawn beginning of the film of the second roll is fixable. hereby can easily peeled the beginning of the slide the second film roll are fixed, so that after process the second film roll in the working position of the further film deduction is simplified.

Conveniently, the device according to the invention has a Suction on, by means of the fixed at the fixing tube beginning of film the second film roll upon reaching the working position for the preparation of the intended film deduction on can be fixed.

Conveniently, a cutting device for cutting is further provided the film between the fixing tube and squeegee. This is the beginning of the film of the second film roll in easy manner separable from the fixing tube, so that this together be lowered again with the pallet or the lifting device can.

According to a preferred embodiment of the method according to the invention becomes when one of the film end of the first film roll indicating signal before or during lifting or Method of the second film roll from the first film roll already removed and not yet separated film on again the film roll wound up. This is the subsequent Removal of the first film roll from the working position in very easy way possible.

Figur 1 eine perspektivische Vorderansicht der erfindungsgemäßen Vorrichtung,

Figur 2 eine perspektivische, im wesentlichen seitliche Ansicht der erfindungsgemäßen Vorrichtung,

Figur 3 eine perspektivische Rückansicht der erfindungsgemäßen Vorrichtung,

Figur 4 eine perspektivische Ansicht einer erfindungsgemäß verwendeten Hubeinrichtung,

Figur 5 eine erfindungsgemäß verwendete Antriebseinheit zur Betätigung der Hubeinrichtung,

Figur 6 eine bei der erfindungsgemäßen Vorrichtung verwendete Folienrollenfixierung in perspektivischer Ansicht,

Figur 7 eine perspektivische Ansicht der bei der erfindungsgemäßen Vorrichtung verwendeten Abrolleinheit,

Figur 8 eine bei der erfindungsgemäßen Vorrichtung verwendete Schneidvorrichtung in perspektivischer Ansicht,

Figur 9 eine perspektivische Ansicht eines bei der erfindungsgemäßen Vorrichtung verwendeten Transportwagens,

Figur 10 eine perspektivische Ansicht einer bei der erfindungsgemäßen Vorrichtung verwendeten Wageneinweisung, und

Figur 11 eine bei der erfindungsgemäßen Vorrichtung verwendete Palette in perspektivischer Ansicht.

An embodiment of the invention will now be described in detail with reference to the accompanying drawings. It shows

FIG. 1 shows a perspective front view of the device according to the invention,

FIG. 2 shows a perspective, substantially lateral view of the device according to the invention,

FIG. 3 shows a perspective rear view of the device according to the invention,

FIG. 4 shows a perspective view of a lifting device used according to the invention,

FIG. 5 shows a drive unit used according to the invention for actuating the lifting device,

FIG. 6 a perspective view of a film roll fixing used in the device according to the invention;

FIG. 7 shows a perspective view of the unwinding unit used in the device according to the invention,

FIG. 8 is a perspective view of a cutting device used in the device according to the invention;

FIG. 9 shows a perspective view of a transport vehicle used in the device according to the invention,

FIG. 10 shows a perspective view of a carriage instruction used in the device according to the invention, and

Figure 11 is a range used in the inventive device in perspective view.

The device according to the invention comprises a frame 1 with a left frame part 2 and a right frame part 3, which et al are interconnected by cross struts 4, 5 (FIGS 1 to 3). The cross braces are here according to the width executed to be processed or used film rolls. At both frame parts 2, 3 is in each case a lifting device 6 grown (see also Figure 4). Each lifting device has an endless belt 7, which is guided around two deflection rollers 8, 9 is. The lower pulleys 9 of the lifting devices 6 are by means of a drive unit 10 driven (Figure 5). The lower Pulleys 9 are in this case on the ends of a driven Shaft 11 of the drive unit 10 is supported. The shaft 11 is by means of an endless belt 12 by an electric motor 13th driven (Figure 5). To avoid unwanted lowering the lifting devices 6, for example, in case of power failure it is possible to use the drive unit with a locking disc train.

By means of the lifting devices 6 is a film roll 15th holding pallet 14 movable up and down. This makes it possible the film roll 15 between a waiting position W and a working position A provided in the upper part of the frame, in the film for the intended use of the film roll is deducted to proceed. For fixing the pallet 14 on the lifting devices 6, these are with fixing or centering bolts 6a or formed with support plates 6b (FIG 1).

For introducing the film roll 15 carrying the pallet 14 in the frame 1, this is initially stored on a trolley 16 (Figure 9), which in the lower part of the frame. 1 is insertable. The trolley 16 moves here to four Rollers 17, which are rotatable depending on space could be. The recording or mounting of the pallet 14 on the Carriage 16 is effected by means of at least two centering pins 18, whereby tolerances are compensated in a simple manner. to exact introduction or positioning of the trolley 16 in the lower part of the frame 1 is a carriage instruction 19th provided, which is fixed under the frame 1 at the bottom (Figure 10). The positioning is done by means of on the Trolley provided cam rollers 17 a, which in a tapered guide channel 19a of the car admission 19 insertable are. By positioning the trolley 16 in the car admission 19 is the pallet in a take-off position or the film roll 15 in the waiting position W can be brought, from the lifting device 6 can lift the pallet. The fixation of the trolley 16 in the car admission 19 takes place for example by means of tensioners 20 (Figure 10).

The applicable to the trolley 16 pallet 14 is in individual shown in Figure 11. The pallet 14 consists of a frame, 21, on which a receiving holder 22 for the film roll 15 is attached. The film is here on two Rotary rollers 23 of the receiving bracket 22 launched, which in corresponding receptacles 22a can be introduced. This can For example, the beginning of the film for Vorrüsten in a simple manner subtracted from. For fixing and making available the At the beginning of the film is this after removal of the film roll 15th on a provided on the pallet 14 fixing tube 24 preferably Rectangular cross-section fastened or attachable. A possible varying outer diameter of the film roll 15th (in practice between 250 and 350 mm) can by different Insertion heights of the rotary rollers 23 are compensated. This takes place in a simple manner by selecting corresponding recesses 22a. As a result, for example, film rolls 15 of used by different manufacturers. The pallet 14 also has a discharge bracket 25, by means of which a in the working position of the device located film roll 26 after use in a Pappkernaufnehmer 27 ejected is, as will be explained below. The ejector handle 25, with reference, for example, to the illustration of Figure 11, about an axis 28 pivotally upwards.

The means for fixing the film roll 26 in the working position A of the device are shown in detail in FIG. The fixation of the film roll in the working position A takes place on both sides by means of a respective Konusaufnahme 29. Die Konusaufnahmen 29 are movable separately over cylinder 30, i.e. from the film roll 26 wegfahrbar or approachable to this. The orientation of the film roll 26 in the working position A can for example via one of the two cylinders 30, which serves as a determining cylinder done. By pressure differences left and right driving determines the determining cylinder 30 out, whereby the film roll 26 can be aligned in the desired manner is.

It will now be first, in particular with reference to the figures 1 to 3, the operation of the illustrated device for Transport or lifting the in-waiting position Film roll 15 in the working position, in which they by Konusaufnahmen 29 is described, described. When in the figures 2 and 3, the first is shown Film roll 26 in the by Konusaufnahmen or mandrels 29th fixed working position A and the second film roll 15th is in its waiting position W on the pallet 14, which still rests on the trolley 16. A roll core 26a, who already at an earlier date from the working position A is located in a cardboard core holder 27. Grip by means of their fixing bolts 6a and their support plates 6b the respective lifting devices 6 upon actuation of the drive unit 10 at corresponding recesses or attack surfaces in the bottom of the frame 21 of the pallet 14 at.

By means of the lifting devices 6, the pallet 14 of the Lift trolley and move upwards. Here comes First, the ejector bracket 25 in contact with the in the working position located film roll 26 and its core. Short before the ejector bracket 25 touches the film roll 26 are the Konusaufnahmen or mandrels 29 open, the film roll 26 have held during the Folienabrollvorgangs. If the pallet 14 now moves up, the film roll is 26 acted upon by the ejector bracket 25 and falls to the rear into the cardboard core receiver 27 as shown by the roll core 26a is indicated. Now, by further lifting the pallet 14, the film roll 15 mounted on the pallet 14 be brought into the working position and there by means of the cone shots 29 fixable. It is by means of a single stroke movement thus possible to remove the used film roll 26 and replace it with a new film roll 15. As below is explained, this is at the same time a truncation the beginning of the film from the fixing tube 24 feasible. Subsequently the pallet 14 is lowered in the same way again, wherein the ejector bracket 25 by pivoting about axis 28 at the now in the working position new film roll 15th is passable.

It will now be the unwinding unit shown in detail in FIG 40, over which a defined peeling of film from the Film roll 26 in the working position is possible described. The unwinding unit 40 is in the upper part of the frame 1 in the area arranged the cross struts 5. It has measuring means with a Measuring wheel 41 and an electronic counter. The measuring means are in operative connection with the one in the working position Film roll and determine the length of the peeled off Foil, and solve with correspondingly far withdrawn film, for example 800 m, the described automatic film roll change out. Here, for example, one of the measuring means producible signal to a control device of the lifting device are given. The unwinding unit 40 further has a Dancer roller 42 on. This is about a motor, for example a pneumatic motor or an electric motor, drivable. At the Peel off film from the one in working position Film roll 26, the motor as a brake for the dancer roller 42nd used. The braking torque can be fixed or variable become. It should be noted that as an alternative to this Bakkenbremsen, Disc brakes or eddy current brakes used can be. By a corresponding adjustment of the dancer roller 42, the peel point or the peel edge of the on the Film roll 26 located film varies in a suitable manner become. Here, the contact pressure of the dancer roller on the film roll adjustable.

When triggering the already described essentially automatic Film roll change is first the film roll stopped by the film roll 26. Subsequently, a Rewind the remaining film on the film roll 26. This rewinding takes place via the dancer roller 42, which in this case accordingly is driven. Subsequently, the components the unwinding unit 40 from the engagement area of the lifting device 6 brought. After completion of the replacement procedure described above and positioning the new film roll in the working position A become the components 41, 42 of the unwind unit 40 again brought into operative connection with the new film roll. It is possible to use the unwinding unit with a device for equip electrostatic discharge of the film. Here is in particular a combination of a fixed upper, and a swiveling lower bar conceivable.

As already described, when lifting the new film roll 15 in the working position A whose beginning end to a fixing tube 24 fixed. Upon reaching the working position by the new roller 15 is the between the film roll 15 and the fixing tube stretched film on one provided in the upper frame part Suction and cutting device 50 (Figure 8). This For example, has a comb-like suction strip 51, at the the stretched film of the film roll 15 is fixable. It is also possible, the film cyclically by means of tensioners on the Squeegee 51 to hold a foil loss, for example in case of malfunction of the squeegee, prevent. Then done by means of a knife 52, a separation of the film from the Film roll. The new film roll 15 is now in the working position fixed and for removing the film from the film roll prepared. The knife 52 is for example of a pistonless Cylinder, resulting in a long knife life and a simple and easy blade change is possible. While the cutting process, it is possible to use the film additionally to hold a bleed.

According to the invention, this is a device for fully automatic Slide change created. Ejecting an old scroll and the introduction of a new role is done by a single (motor) lifting movement. An assembly of the device with a new roll of film needs only once within a layer, take place, for example, at the beginning of the shift. The equipment of the Device can be done at any time regardless of production. Since the assembly carried out by means of a trolley is, the placement is arbitrary. When replacing the film rolls occurs no or only a very short interruption of the production process. A tact time is by the replacement of the film roll not or only slightly extended because the change, for example, during a perforation, a laying time of the film on a motor vehicle or during the other handling time of the deducted Slide can be done. Due to the modular design, the inventive Device in a simple way to different Film widths to be converted. It only need the Cross-connection components modified according to the width of the film become.

Claims (11)

1. Device for automatical changing film rolls comprising

   means (29, 30) for holding a first film roll (26) in a working position (A), in which the film can be pulled off and separated from the film roll (26) according to requirements,

   a palette (14) for holding a second film roll (15) in a waiting position (W),

   a lifting device (6) for substantially vertical movement of the second film roll (15) held by means of the palette (14) from the waiting position (W) into the working position (A), the first film roll (26) being removable from the working position (A) owing to the movement of the second film roll (15), and

   a pivotable ejection flange (25) connected to the palette (14) for removing the first film roll (26) from the working position (A) during movement of the second film roll (15),

   characterised by a dancing roller (42) which can be driven and/or braked and can be brought into operative connection with the first film roll (26).
2. Device according to claim 1, characterised in that the support rollers (23) can be inserted into different receivers (22a) of a receiving holder (22) in such a way that different films with different film roll diameters can be inserted in the device without additional adjustments.
3. Device according to either of claims 1 or 2, characterised by means (6a) for fixing the palette (14) on the lifting device (6).
4. Device according to any one of the preceding claims, characterised in that the palette (14) can be positioned on a conveying carriage (16), which can be moved into the frame (1) of the device in such a way that the second film roll (15) arranged on the palette (14) can be brought into the waiting position (W).
5. Device according to claim 4, characterised by at least two centring pins (18) for fixing the position of the palette (14) on the conveying carriage (16).
6. Device according to any one of the preceding claims, characterised by measuring means, in particular a measuring wheel (41), which can be brought into operative connection with the first film roll (26), for measuring film which has been pulled off the film roll (26) and with signal generating means cooperating with the measuring means for emitting a signal to a control device of the means (6) for triggering the movement of the second film roll (15).
7. Device according to any one of the preceding claims, characterised by a fixing tube (24) which can be attached to the lifting device (6) or the palette (14) and to which a pulled-off film end of the second film roll (15) can be fixed.
8. Device according to claim 7, characterised by a suction strip (51), by means of which the film end of the second film roll (15) fixed to the fixing tube (24) can be brought into a defined position with respect to the working position (A).
9. Device according to claim 8, characterised by a cutting apparatus (52) for cutting off the film between the fixing tube (24) and suction strip (51 ).
10. Device according to any one of the preceding claims, characterised in that the means (29, 30) for holding the first film roll (26) in the working position (A) have actuable conical receivers (29) which can be axially placed against the film roll (26) located in the working position (A) to hold it, and can be moved away from it during or prior to removal of the film roll (26) from the working position (A).
11. Method for automatically changing film rolls, in particular in a device according to one of the preceding claims, comprising the following steps:

    arranging a first film roll (26) in a working position (A), in which the film can be pulled off and separated from the film roll (26) according to requirements,

    arranging a second film roll (15) in a waiting position (W),

    on generation of a corresponding signal from measuring means cooperating with the first film roll (26), movement of the second film roll (15) from the waiting position into the working position, the first film roll (26) being removable from the working position (A) by means of an ejection apparatus (25) which is movable with the second film roll (15) before the second film roll (15) reaches the working position (A),

    characterised in that on generation of the signal, a film already putted off the first film roll (26) and not yet separated is wound onto the film roll (26) again prior to or during the movement of the second film roll (15).

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