EP0805773B1 - Device for applying a material strip to a winding tube - Google Patents

Description

Technical field

The invention relates to a for adhesive-free creation of webs in one Winding machine, preferably a device suitable for multiple winding machines mentioned in the preamble of the new claim 1.

State of the art

Such a device is disclosed in US Pat. No. 3,482,793. At this Known device, the web is cut in non-stop operation by means of a cutting knife designed as a tooth knife, which by means of a Beam, on which at the same time a brush or rubber lip for applying the Material web is attached to a new winding tube, performs a pivoting movement. With such a cutting process, the cutting point on the web is not exact defined, as this depends on the type of material, the web tension and the Tooth shape of the cutting knife depends. Thus, a precisely definable one The initial length of the web cannot be observed. Nor can you be flexible Achieve handling when cutting and creating the web, because that Cutting knife and the application element on the same swiveling beam are attached. Above all, such an application element cannot be used highly sensitive plastic films, such as those used in particular for photographic purposes be used, because the brush or the rubber lip highly sensitive surface of the emulsion of the plastic film would be damaged. Also can not with the known device sensitive adjustment of the contact pressure between the pressing elements of the web and the winding tube.

Finally, an adaptation to different sized winding cores can be achieved by a minor adjustment can only be achieved to a limited extent and in addition, this can also be carried out only with great effort.

A winding machine with feeder that works according to the same principle goes from U.S. Patent 3,908,924. There is on the carrier element of the cutting element also attached a contact element in the form of a brush, with the help of Start part of the cut web to be placed on the winding tube can. In addition, there is a compressed air support to the web at the Hold winding shaft. Because the cutting element and the application element on the same Carrier element are attached, is an individual adaptation to different Railway materials, tensions and winding core diameters are not easily possible. In particular, by using a brush, this application device is not for Suitable for use with highly sensitive plastic films.

Another principle, known from EP-A-0 183 135, works according to another principle Application device, which is assisted by electrostatic charging of the web material operated to in this way a creation of the web section to the To improve the peripheral surface of a new winding tube. Apart from that too here again the web is cut in non-stop operation and the initial part the new winding tube is put on, it must be doubted whether the electrostatic Loading of the material strip with very highly sensitive plastic films at all is possible.

Presentation of the invention

The invention has for its object one for the adhesive-free application of Material webs in a winding machine, preferably a multiple winding machine to create suitable device of the type mentioned, by means of which The winding machine comes to a standstill a highly sensitive plastic film especially without damaging the highly sensitive surface of the Plastic sheeting and with a precisely definable length of the beginning of the web Can create winding tubes.

This object is achieved by the characterizing features of claim 1.

With the means according to the invention one arrives at an application device which is in special way to cut and perfect creation of special highly sensitive plastic sheeting, as z. B. used in the photo industry are suitable, without the risk of damage or other Impairment of the beginning of the web is to be feared. The fact that the Application elements of the application system on an independent of the cross-cutting system pivotally mounted support arm are held. This will make it more flexible Handling when cutting through the plastic film on the one hand and when putting on the beginning of the web on the other hand. It is also important that the distance between the contact point of the pressure elements on the winding tube and the interface of the cutting knife of the cross cutting system is selected so that the initial length the plastic film web essentially the remaining circumference of the winding tube between the initial contact point of the pressing elements on the winding tube and corresponds to the contact point between the contact roller and the winding tube. By the concentric pivoting of the connecting rod about the longitudinal axis of the Winding shaft is a crease-free and jam-free application of the beginning of the web to the Winding sleeves are guaranteed because the beginning of the web runs perfectly into the inlet gap to be led. The flawless or damage-free application of the plastic film web is further favored in that the pressure elements are formed by pressure rollers and at the free ends of spring tongues individually attached to the connecting rod are rotatably mounted. It has been found that only through such Spring tongues in connection with relatively small pressure rollers a clean and damage-free creation of highly sensitive webs is achieved. A Finally, the adjustment mechanism of the application mechanism is also sensitive Pivoting of the connecting rod about its own axis and finally reached also due to the special type of drive of the swivel mechanism Use of two gears, which are on the pivoting arm are mounted that at least during the pivoting movement of the one washer always a gear in mesh with the teeth of the rotatable ring disc remains. This configuration of the drive mechanism enables the slotted ones Openings in the ring disks also run one after the other over the drive gearwheels, which also means that the position of the support arm and any pivot angle can be chosen, d. H. one comes with relatively simple means an all-round drive, for example through the use of a compressed air cylinder can be accomplished.

Brief description of the drawing

Fig. 1 bis 6

in schematischer Darstellung den Anlegevorgang eines neuen Warenbahnanfangs gemäß der Erfindung,

Fig.7

einen Teil des Anlegesystems in vergrößertem Maßstab,

Fig.8

einen Schnitt entlang der Linie VIII-VIII der Fig. 7

Fig.9

in schematischer vergrößerter Darstellung den Beginn des Anlegevorgangs und

Fig.10

das Ende des Anlegevorgangs.

A preferred embodiment of the invention is shown in the drawing and is explained in more detail below. Show it:

1 to 6

a schematic representation of the process of creating a new web start according to the invention,

Fig. 7

part of the application system on an enlarged scale,

Fig. 8

a section along the line VIII-VIII of Fig. 7th

Fig. 9

in a schematic enlarged representation the start of the application process and

Fig. 10

the end of the creation process.

Way of carrying out the invention

In Figures 1 to 6 is a schematic side view of a double winding machine with the devices for cross-cutting and laying the web 1, for example shown in a highly sensitive plastic film. The web 1 is one Deflection roller 2 and a contact roller 3 guided, after which the Material web is wound on a winding roll 4. Diametrically opposite the Winding roll 4 can be during the winding process over the machine width extend winding shaft 10 with winding sleeves 5.

The winding shaft can be twisted in the manner described in more detail below a turning cross of the double winding machine in the position of the current one Winding roll 4 are pivoted. To the double winding machine belongs here scope of interest also a placement system 6 and a cross-separation system 7 for the web. The cross-cutting system 7 has two pliers toward one another or apart movable support lever 8, at the free ends of cutting knife 9th to sit. Both support levers can be pivoted about a common pivot axis 11. In the illustrated embodiment, there is also a about this pivot axis 11 Support arm 12 of the application system 6 pivotable. At or near the free end the support arm 12 has an application element 13 and a pivoting mechanism 14 , both of which are explained in more detail below.

A preferred embodiment of an application element 13 and a pivoting mechanism 14 is shown in FIGS. 7 and 8. The application element 13 has a concentrically pivotable about the axis 15 of the winding shaft 10

Connecting rod 16, which extends across the working width of the winding machine extends and on the resilient pressure element 17 in the form of resilient Retaining plates or tongues are attached so that they protrude freely. At the front ends the tongues 17 are pressure rollers 18 rotatably mounted in more detail below described way to get to the system with the web and creating a effect new web start around the winding tube 5.

At each end of the connecting rod 16 is the pivoting mechanism already mentioned above 14 arranged. This pivoting mechanism consists in individual from two, each provided with a slot 20, substantially C-shaped trained washers 19, 21, of which the first-mentioned washer 19 is connected to the connecting rod 16 via a lever 22, while the other washer 21 is attached to the support arm 12 of the application system is. The washer 19 is opposite the washer fixed to the support arm 12 21 relatively rotatable. For this purpose, the washer 19 is on one Intermediate ring 23 attached, which has a toothing on its outer side 24 and which is in meshing engagement with two gears 25, 26. The gears 25, 26 each sit on an axle stub 27 which is in a bore via roller bearings 28 29 of the support lever 12 is rotatably mounted. Corresponding to the gears 25, 26 sit on the opposite side of the support arm 12 on the stub axle 27 Drive gears 31, via which and not shown toothed belt or the like and a connecting shaft, also not shown, is a synchronous one Drive of the two rotatable washers 19 is ensured. The distance the gears 25, 26 to each other is selected such that the pivoting drive Then maintain washer 19 by one of the gears 25 and 26, respectively is when the other gear in the area of the slot 20 of the washer reached.

The device designed according to the invention for cross-cutting and applying Goods web takes place in the following way:

Starting from the arrangement shown in FIG. 1, as soon as the winding roll 4th has reached its desired extent, it is pivoted into the position shown in FIG. 2. During this movement, the previously prepared winding shaft 10 comes along the winding sleeves 5 sitting thereon in the position also shown in FIG. 2. The Material web 1 thus extends from the winding tubes 5 to the winding roll 4. Before this, the contact roller 3 has its swivel arm 3 'except for the winding tubes 5 has been pivoted so that the web of goods is properly guided between them and is pinched. 3, the dashed line is now shown Support arm 12 pivoted so far up that the pivot mechanisms 14 the Can encompass winding shaft 10 from below, outside the actual one Working width so that the web is still on the winding axis seated winding sleeves runs to the winding roll 4. In this position the Pressure rollers 18 under slight pressure on the led around the winding tube 5 Web, as shown more clearly in Fig. 9.

4, the support levers 8 of the cross-cutting system 7 are now like pliers moved towards each other so that the cutting knife 9 attached to it Web is cut. The distance between the pressure rollers 18 to Cutting knives 9 corresponds approximately to the remaining circumference from the initial point of contact the pressure rollers 18 on the winding tube up to the contact point between the contact roller 3 and the winding tube 5. After cutting the Material web is over by the pivoting mechanism 14 described above the rotatable washer 19 and the lever 22 on the connecting rod 16 a concentric circle 20 moves, as can be seen from Fig. 9, namely as long and until the pressure rollers 18 shortly before reaching the contact point come to a standstill between the pressure roller 3 and the winding tube 5. By this pivotal movement of the connecting rod 16 and the pressing elements the beginning of the web perfectly and without folds and without using Adhesive securely placed around the winding tube 5. The end position of the connecting rod 16 and the pressure rollers 18 attached to it is shown in FIG solid lines are shown. After winding a few turns of the Material web is so the ring disc 19 via the pivoting mechanism 14 twisted that the pivoting mechanism is released from the winding shaft again, so that then via the support arm 12 the application mechanism again in its in Fig. 6th or 1 shown starting position can be pivoted back. The same goes for analogously also for the cross separation system 7.

Claims (3)

1. A device for applying material strips (1) in a coiling machine, preferably a multiple coiling machine, in a non-adhesive process, using a coiling shaft (10) which can be pivoted into the required position for accepting winding tubes (5), with a contact roll (3) working in conjunction with the coiling shaft, a cross-cutting system (7) for separating the material strip (1) across its width, and an applicator system (6) consisting of one applicator (13) arranged on each side of the coiling machine to press the leading edge of the material strip (1) onto the winding tubes (5), where the applicator (13) features a linking rod (16) stretching across the working width of the machine, to which rod individual pressure elements (17) are attached, and, at each end of the linking rod (16), a swivelling mechanism (14), acting on the corresponding applicator (13) and consisting of a slotted disk (21) on each swivelling mechanism (14) mounted in first position on the pivoting support arm (12) of the applicator system (6) and a further slotted disk (19) in second position which is pivotable in relation to the first slotted disk and whose joint imaginary centre points at the point of application of the applicator system (6) coincide with the longitudinal axis of the coiling shaft (10), characterised by the fact that the applicators (13) are held by the support arm (12) which can be pivoted independently of the cross-cutting system (7) and further by the fact that, in the event that the material strip feed should be interrupted, the distance between the initial point of contact of the pressure elements (18) on the winding tubes (5) and the point at which the cutter (9) of the cross-cutting system (7) cuts the material strip (1), is so designed that the amount of material remaining after the cutting action between the initial point of contact of the pressure elements (18) and the cutter (9) of the cross-cutting system (7) corresponds in principle with the remaining circumference of the winding tube (5) between the initial point of contact of the pressure elements (18) on the winding tube (5) and the point of contact between the contact roll (3) and the winding tube (5) and further by the fact that the pressure elements (18) are comprised of pressure rolls (18) mounted in bearings so that they are free to revolve, on the floating ends of fingers (17) whose other ends are attached individually to the linking rod (16) which can be pivoted concentrically to the longitudinal axis of the winding tube (10) up to a point immediately before the point of contact between the contact roll (3) and the winding tube (5), and which pressure rolls firmly but gently press the plastic material strip (1) against the winding tube (5) and, finally, by the fact that the linking rod (16) is pivotable around its own axis for the purpose of fine-tuning the contact force of the pressure elements (17, 18) and for adjusting to suit varying diameters of winding tubes and can be locked in position and featuring at least two gearwheels (25, 26) located at a distance from each other for driving the rotating disk (19) of the swivelling mechanism (14) whose teeth engage in the corresponding teeth on the circumference of the rotating disk (19) or an intermediate disk (23) linked directly to it, and of which gearwheels at least one is constantly engaged in the corresponding teeth on the circumference of the rotating disk (19) or intermediate disk (23) during the pivoting motion.
2. Device according to Claim 1 where the synchronous drive of the two rotating disks (19) which are each linked by a lever (22) to the ends of the linking rod (16) is effected by means of gearwheels (31), timing belts or similar means and using a linking shaft.
3. Device according to Claim 1 or 2 where the bearing axis of the support arm (12) on which the non-pivoting disk (21) is mounted, coincides with the common pivoting axis (11) of two support levers (8) of the cross-cutting system (7) which are pivotable in the manner of pincers.

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