EP2042461B1 - Self-tensioning core carrier - Google Patents

Description

The invention relates to a core carrier for clamping cores, wound on the winding material, in particular sheet-like materials such as self-adhesive tapes or from which winding material is unwound.

If a winding material is to be wound on cores, the individual core carriers on the winding shaft before starting the winding shaft with empty cores, which may for example be in the case of winding a tape made of cardboard, be equipped. For this purpose, the intended number of core carriers is first pushed onto the winding shaft. The core beams are firmly clamped together axially. Subsequently, the core carrier are equipped with a corresponding number of cores, in particular, the cores must be performed in the middle of the winding shaft over a larger number of core carriers.

When unwinding on cores winding material shows in principle the same picture. A roll with the winding material, which is located for example on a core of cardboard, is pushed onto the core carrier and must be fixed on this in such a way that slipping is excluded.
Only in this way can a predetermined value of the web tension be ensured within the material to be unwound.

• Beim Schieben eines Kernes aus beispielsweise Pappe oder Kunststoff über den Kernträger darf keine Beschädigung des Kernes auftreten.
• Die sichere Fixierung des Kerns muss gewährleistet sein, so dass ein Durchrutschen des Kernträgers im Kern nicht auftritt. Verschärft gilt es, dies im Wickelprozess zu vermeiden.
• Der Kernträger sollte nur ein geringes Gewicht aufweisen.
• Er muss durch eine hohe Lebensdauer gepaart mit einer hervorragenden Wartungsfreundlichkeit ausgezeichnet sein.
• Durch Aufbringen einer Friktion soll der Kernträger die Bahnspannung des Wickelgutes beim Wickeln kontrollieren.
• Der Kernträger soll für große Innendurchmesserschwankungen des Wickelkernes verwendbar sein.

Such a core carrier must meet a variety of demands placed on him:

• When pushing a core of, for example, cardboard or plastic over the core carrier no damage to the core may occur.
• The secure fixation of the core must be ensured so that slippage of the core carrier does not occur in the core. Stricter is to avoid this in the winding process.
• The core carrier should have only a low weight.
• It must be characterized by a long service life paired with excellent serviceability.
• By applying a friction, the core carrier should control the web tension of the winding material during winding.
• The core carrier should be usable for large inner diameter variations of the winding core.

Comparable requirements are made of the core carrier, if this is a core with winding material to be unwound. This can be the case, for example, when the good is donated to a production process.

The DE 43 09 062 A1 discloses a single driven core carrier for winding shafts. The essential components of the core carrier form a bushing, a base body, a pressure piece and a slotted clamping ring, wherein both the base body and the clamping ring have circumferential grooves for receiving two elastic rings. The transmission of the rotational movement of the winding shaft on the core located on the clamping ring takes place by the pressure element connected to the main body presses against the tightly clamped on the winding shaft sleeve. The resulting frictional force during the rotation of the winding shaft generates a torque which is transmitted to the base body and passed by means of the elastic rings on the clamping ring.

From the DE 12 52 032 A1 is a storage for a coil for unwinding and wrinkle-free winding of band-shaped material on a very small winding mandrel known, wherein the coil is mounted on one side and tiltable on all sides about the center of the axis. The bearing consists of a sleeve, in which circumferential grooves are provided, and an elastic element which serves at the same time for transmitting the torque of the shaft and for tensioning the coil.

The DE 21 42 286 A1 describes a core sleeve tensioning device having a hub for insertion into the end of a core sleeve.

The core sleeve tensioning device is formed by a hub on which an O-ring is mounted. By means of a recess in the hub, it is possible to fix the core sleeve by the O-ring when pushing a core sleeve in the axial direction of the core sleeve tensioning device.

From the JP 62 041144 A1 is known a core carrier for winding shafts, which consists of a bushing, a friction body, a transmission element, two ball bearings and other components such as snap rings. The friction body is not inseparably connected to the liner.

This core carrier is mounted on a winding shaft in which a pressure hose is inserted. If air is applied to the pressure hose, a friction body in the core carrier is pressed by the pressure hose against a transmission element, which in turn carries a core. This creates between the friction body and transmission element, a torque which serves to drive the transmission element.

The high number of individual parts of the core carrier but requires that the core carrier must be made very expensive and that in addition, the loading of the winding shaft with the core carriers is very time and labor intensive.

Furthermore, the core carrier due to the complicated structure on a large height, so that the applications are limited for cores with small inner diameters.

The JP 02 132043 A1 discloses a core carrier which is comparable to the core carrier of FIG JP 62 041144 A1 shows a very complicated structure.

The core carrier essentially consists of a bushing, in which on the side facing the core wedge-shaped grooves are inserted, which serve to receive balls.

In the winding shaft, a pressure hose is inserted, which presses with appropriate action of the friction body against the underside of the liner, whereby the liner is driven.

With appropriate rotation of the liner, the balls wedged between the core and liner. The transmission of the winding torque from the winding shaft to the core takes place in the core carrier accordingly via a plurality of balls.

The US 3,817,468 A1 describes a core carrier / winding shaft combination, which consists of a variety of individual components.

In the winding shaft, at least one pressure hose is inserted, which presses a friction body against a bushing with appropriate filling. Grooves are present in the other raceway of the liner in which balls transmit torque from the liner to the core.

In the DE 12 37 398 A1 discloses a winding shaft which can be equipped with a plurality of core carriers. Again, the friction transmission takes place in which many loose in the winding shaft recessed friction body are pressed by a pressure hose against the inner rings of the core carrier.

Each core carrier consists of an inner ring, an outer ring and guided in openings of the outer ring, slidably mounted clamping pieces.

The US 4,220,291 A1 describes a winding shaft on which several cores can be wound simultaneously. The friction is generated by means of balls, which act by means of a pressure hose directly on the cores.

Here is dispensed with individual core carrier, so that damage or wear of a ball as a friction body pulls the replacement of the entire winding shaft by itself.

In the DE 11 43 074 A1 a winding shaft is set out in which many individual, loose friction body are pressed by means of a pressure hose against shoulder rings, which in turn carry the equipped with the cores tensioners.

Furthermore, from the DE 195 17 226 A1 a core carrier for clamping cores known to wind winding material, in particular self-adhesive tapes, wherein the Core carrier has a base body which serves to receive the core and to transmit the torque of the winding shaft to the core.

The main body has a flexible outer ring, which is designed as a unilaterally slotted ring, and a support ring, wherein in the outer ring and / or the support ring, a plurality of recesses are provided, in which an evasion of at least one elastic clamping ring of the body, the Ensuring the frictional connection between the support ring and the outer ring, takes place when a radially acting pressure is exerted on the outer ring from the outside, as occurs in particular when mounting cores on the core carrier.

In the DE 195 17 225 A1 is a winding shaft for clamping one or more cores on one or more, in the axial direction side by side on the winding shaft arranged core carriers and for generating a torque in the core carriers for winding winding material, in particular of self-adhesive tapes, disclosed, wherein in the winding shaft, a device for the targeted delivery of a radially outwardly acting, freely selectable within a wide range force, in particular a pressure medium hose.

By virtue of the forces originating from the device, one or more friction tongues in each core carrier, which are each arranged in at least one recess in the running surface of the bushing of the respective core carrier, can be pressed radially against the transmission element of the respective core carrier, thus being deflected by the friction between the friction tongue and Transmission element to generate a torque which serves to drive the transmission element.

The DE 101 15 297 A1 shows a core carrier for clamping cores to winding, in particular self-adhesive tapes, up and / or unwind, wherein the core carrier has a base body which serves to receive the core and for transmitting a torque to the core.

The outer running surface of the base body is substantially cylindrically shaped, and at least one recess extending into the running surface is present in the base body. In the body further at least one pin is rotatably mounted, wherein the pin has an eccentric portion which turns upon rotation of the pin From the recess of the body rises, so that this section is partially outside the contour of the body.

By rotation on the pin is achieved that the eccentric portion of the same is also set in rotation. Since the central axis of the pin is not identical to that of the eccentric portion, this rises with a corresponding arrangement of the tread of the body and is pressed against the core of the winding material. The further the pin is rotated, the more the eccentric portion of the pin is guided against the core, so that at some point the core press sits on the section.

The core then no longer slips through, even if good is unrolled from it.

The invention is based on the object to provide a core carrier, which does not have the disadvantages of the prior art, or at least not to the extent and at the same time meets the requirements, ie when pushing a core of cardboard, for example, over the core carrier no damage of the core, which safely fixes the core, which has a low weight, as versatile as possible and which is characterized by a long service life combined with excellent ease of maintenance.

To solve a core carrier is proposed, as it is further characterized in the claims. The subject of the dependent claims are advantageous embodiments of the subject invention.

Accordingly, the invention relates to a core carrier for clamping cores to winding and, in particular web-like materials such as adhesive tapes, up and / or unwind, wherein the core carrier comprises a clamping ring which is for receiving a core and on a winding shaft located to transmit a torque serves on the core and whose outer running surface has substantially the shape of a straight circular cylinder. The clamping ring is designed so flexible that the outer diameter of the clamping ring can be varied, and is designed as a self-contained ring and has at least one recess which extends into the inner and / or outer tread.

The core carrier may consist solely of the clamping ring and thus comprise only a single component. In principle, however, it is also possible that the core carrier comprises additional components in addition to the clamping ring.

In a first advantageous embodiment of the invention, the clamping ring in the form of a thick-walled hollow cylinder. Usually - but this is not mandatory - the hollow cylinder is designed as a straight circular cylinder.

In order to facilitate the assembly and removal of the core of the core carrier according to the invention, the edges of the clamping ring are advantageously slightly bevelled. At the same time, this reduces the risk of damaging the cores during the mounting process.

Further advantageously located between winding shaft and clamping ring of the core carrier a liner. The bushing can be positively or non-positively connected by clamping (for example via grub screws) or by drivers with the winding shaft, so that the bushing rotates at the same speed as the winding shaft, so no slip is observed.

Further preferably, the bushing is shaped so that it serves as a spacer between the individual core carriers on the winding shaft. For this purpose, it has on one side a disc-shaped collar on the edge, whose diameter is preferably approximately equal to the outer diameter of the clamping ring.

In the clamping ring, in a further advantageous embodiment of the invention, at least one, preferably a plurality of recesses are present, which extend into the inner and / or outer running surface and which ensure the flexibility of the clamping ring. These recesses do not go through the entire body shaped as a hollow cylinder of the clamping ring. Because the clamping ring in this way, although flexible, but still closed, no dust or dirt can penetrate through the clamping ring on the inner tread, so that the life of the winding shaft and other components on the winding shaft due to non-occurring friction losses can be significantly extended. In this embodiment, the core carrier advantageously consists only of the clamping ring, so that a simple structure and a cost-effective production can be ensured.

Preferably, the recesses are in the form of blind holes extending from the inner and / or outer tread into the clamping ring.

Particularly preferably, the recesses in the form of axially arranged slots extending from the inner and / or outer tread into the clamping ring. Each slot may be present across the entire width of the tread so that it forms a narrow gap in the tread.

The depth of the recesses in the clamping ring is chosen so that on one side of the clamping ring is movable by the material thinning at this point. On the other hand, however, so much residual material should remain between the running surface and the end of the recess, that the strength of the clamping ring is also under load such that a mechanical failure is excluded.

The depth is preferably based on the thickness of the cylindrical clamping ring 50 to 80%.

For example, with a thickness of the clamping ring of 10 mm, the depth is between 5 and 8 mm.

In a further advantageous embodiment of the invention, in each case a plurality of recesses are arranged in the immediate vicinity of one another, for example three, which form a group.

Particularly advantageous three slots form a group. Of the three, two slots aligned in parallel extend from the outer raceway of the tensioning ring into the interior, while the third extends from the inner raceway into the tensioning ring centered between the other two.

More preferably, several of these groups are present at regular intervals in the clamping ring to ensure a uniform course of the tension in the clamping ring.

If one starts from the above-described group of three slots, then eight groups have proved to be advantageous, between which there is a spacing of 360 ° / 8 = 45 ° on the outer running surface.

In an alternative embodiment, which is not covered by the invention, the clamping ring has at least one interruption. In other words, the clamping ring is not designed as a self-contained ring, but has at least one point on an interruption. The interruption may be formed, for example, as a continuous, radial cut through the ring at the point of interruption. By the at least one interruption, it is possible that the clamping ring expands outwards and thus the outer diameter of the clamping ring can be varied. If the clamping ring expands, a gap or gap between the two ring ends arises at the point of interruption. Conveniently, the material of the clamping ring in this embodiment, at least a certain flexibility, so that an expansion of the clamping ring without damaging the material is possible.

Preferably, the clamping ring in this embodiment consists of two, preferably the same size, ring sections. Thus, the clamping ring in this embodiment, two interruptions, which are arranged substantially opposite one another. The clamping ring can therefore be composed of two ring halves. In this way, a clamping ring can be created in a particularly simple manner, the outer diameter can be varied.

In principle, the clamping ring provided with at least one interruption can form the sole component of the core carrier. In a further preferred embodiment, however, it is provided that the core carrier additionally comprises a spring element for applying a bias voltage to the clamping ring. Due to the inherent prestressing of the core carrier, the latter alone can exert a frictional force on a core seated on the core carrier without the need for additional devices for applying radially outwardly acting clamping forces. The size of the applied friction force is dependent on the size of the biasing force. By the provision of at least one interruption, it is possible that the spring element radially expands the clamping ring, so that the outer diameter of the clamping ring is variable.

In principle, any suitable spring-acting component can be used here as a spring element. Particularly preferably, the spring element is designed as a snap ring, which is advantageously used in an inside groove of the clamping ring. A snap ring usually made of spring steel or a similar material having spring properties is a commercially available component which has a simple structure and can therefore be used cost-effectively. At the same time an efficient and substantially uniform application of the biasing force is achieved on the clamping ring in a simple manner. Through the provision of the groove of the snap ring is fixed in position and thus ensures a safe function of the core carrier. A snap ring usually consists of a ring bent strand of spring steel or similar material, the two strand ends are spaced from each other, so that there is a ring that is not self-contained.

To tension the clamping ring and thus to increase the outer diameter of the clamping ring is in a further advantageous embodiment in the winding shaft, a device that allows the targeted delivery of a radially outwardly acting, within a wide range freely selectable force.

Preferably, the device is formed from one or more pressure fluid hoses, which are arranged in the axial direction in the winding shaft and thereby distributed as evenly as possible over the circumference of the winding shaft. In advantageous three hoses, these have a distance of 120 °.

The pressure hoses are in particular in grooves that are present in the winding shaft, so that when empty pressure hoses these are completely in the grooves.

The power transmission from the device into the clamping ring is preferably effected via friction elements. If liners are present, they must have recesses in which the friction elements can run.

About the friction elements, the torque of the winding shaft is transmitted to the inner raceway of the clamping ring under slip.

The core carrier according to the invention allows that during the winding or unwinding even a slight slip between friction and core carrier occurs.

Furthermore, upon pressurization of the hoses (by fluids such as air or water), the diameter of the clamping ring is increased such that the core located on the outer surface press sits. The core then does not slip through, even if good is rolled on this.

At the same time, the cores can be easily preloaded by the flexibility of the clamping ring during insertion and removal of the core carrier. For this purpose, the outer diameter of the core carrier is slightly higher to choose than the inner diameter of the cores.

Finally, it has proved to be particularly advantageous if the clamping ring is made of plastic.

The core carrier according to the invention has a further set of advantages.

Due to the special structural design of the clamping ring unwanted slippage of the core during the up and / or unwinding is excluded. These high holding forces between the core and the core carrier simultaneously prevent lateral proper movement of the core on the core carrier. This prevents a disadvantageous offset of the core during the winding process. There is always the optimum holding force for the respective applied tensile force.

Because of the flexibility of the core carrier and the associated increase in the outer diameter, different inner diameters of the cores, which can not always be suppressed in terms of production, are compensated by the core carrier.

Since the forces acting on the cores holding forces act on a larger diameter than the friction forces, resulting in an excess of force, which serves to fix the cores.

At standstill, the cores can be easily moved over the juxtaposed core carrier because of the low Aufschiebekräfte.

Due to the small number of individual parts that make up the core carrier, a particularly cost-effective production is possible. The comparatively simple construction also ensures a very good maintainability.

In the particularly advantageous production of the core carrier made of plastic, for example from Novatron HPV ^® PolyPenco (a plastic based on polyethylene terephthalate), a low weight of the core carrier is still achieved. Furthermore, the core carrier from the mentioned material are characterized by a high stability.

The core carrier according to the invention has, in particular in combination with others on a winding shaft, a number of advantages. The winding torque is reproducible and controllable for each individual core carrier, because a mutual influence of the individual frictions transmitting core carrier, when they are arranged on a winding shaft, is excluded. In this way, a desired winding characteristic is adjustable, that is, relevant for the quality of the subsequent winding and technically important data can be specified from the outside. The clever regulation of the friction prevents the formation of voids in the winding as well as the telescoping of the finished roll.

A core offset is excluded because the core carrier can not move on the winding shaft because of the federal government at the edge of the bush when sliding the cores. This collar also ensures that the individual core carrier on the winding shaft at a defined point can be tensioned.

Various embodiments of the inventive core carrier will be illustrated below by six figures, without wishing to be unnecessarily limited by the choice of the figures shown.

Show it

• FIG. 1 a particularly advantageous executed core carrier in the side view,
• FIG. 2 in the side view of the particularly advantageous executed core carrier FIG. 1 with a core pushed onto it, the core carrier sitting on a winding shaft,
• FIG. 3 the core carrier including winding shaft after FIG. 2 in the lateral section along the line AA,
• FIG. 4 a further embodiment, which is not covered by the invention, a core carrier with snap ring in an exploded view,
• FIG. 5 a perspective side view of a ring portion of the clamping ring FIG. 4 , and
• FIG. 6 a side view of the core carrier FIG. 4 with a core pushed onto it, the core carrier sitting on a winding shaft.

In the FIG. 1 is a particularly advantageous executed core carrier 1 shown in the side view. The core carrier 1 consists of a clamping ring 11, which is on its outer side for receiving a core 6 and on a winding shaft 3 is located to transmit a torque to the core 6. The outer tread has the shape of a straight circular cylinder, the clamping ring 11 itself in the form of a thick-walled hollow cylinder.

In the clamping ring 11 a plurality of recesses 21, 22, 23 are present, which extend into the inner and outer tread and provide the flexibility of the clamping ring 11. The recesses 21, 22, 23 are slot-shaped and extend in the axial direction. Each slot 21, 22, 23 is present over the entire width of the tread so that it forms a narrow gap in the tread.

Each slot 21, 22, 23 has a width of one millimeter and a depth of five millimeters. At the end, the slots 21, 22, 23 expand cylindrically.

At the selected depth ensures that on one side of the clamping ring 11 is movable by the material thinning at this point, but on the other hand so much residual material between the tread and the end of the recess 21, 22, 23, that even under load the strength of the clamping ring 11 is such that a mechanical failure is excluded.

Three recesses 21, 22, 23 are arranged in the immediate vicinity of each other and form a group 2, wherein two slots 21, 22 extend from the outer running surface of the clamping ring 11 into the interior, while the third 23 of the inner raceway in the clamping ring eleventh goes and thereby centrally between the other two 21, 22 is arranged. All three 21, 22, 23 extend in the axial direction parallel to each other.

In the clamping ring 11 eight groups 2 are present, which are arranged at a regular distance over the circumference of the clamping ring. By these eight groups 2, the clamping ring is weakened in its strength, so that the core carrier 1 is able to increase its outer diameter when pressure from inside.

FIG. 2 represents in the side view of the particularly advantageous running core carrier 1 with a deferred core 6 for an adhesive tape, wherein the core carrier 1 is seated on a winding shaft 3.

Between winding shaft 3 and clamping ring 11 of the core carrier 1 is a liner 5 made of metal. The bushing 5 is positively connected by (not shown) driver with the winding shaft 3, so that the bushing 5 rotates at the same speed as the winding shaft 3, so no slip is observed.

For tensioning the clamping ring 11 and thus to increase the outer diameter of the core carrier 1 are located in the winding shaft 3, three pressure hoses 31, which allow the targeted delivery of a radially outwardly acting, within a wide range freely selectable force.

The pressure fluid hoses 31 are arranged in the axial direction in the winding shaft 3 and distributed uniformly over the circumference of the winding shaft 3. The pressure hoses 31 are in the winding shaft 3 milled grooves, so that when emptied pressure hoses 31, these are completely in the grooves.

When building up pressure in the pressure fluid hoses 31, for example, by air is pressed in, they expand and press the power transmission friction elements 4 against the clamping ring 11. In the bushings 5 corresponding recesses are provided which serve to receive the friction elements 4 and in which the friction elements 4 can run.

About the friction elements 4, the torque of the winding shaft 3 is transmitted to the inner raceway of the clamping ring 11 under slip.

At the same time press the friction elements 4, the clamping ring 11 to the outside, which increases its diameter, so that a frictional engagement between the core 6 and core carrier 1 is produced.

FIG. 3 shows the core carrier 1 along with the winding shaft 3 after FIG. 2 in the lateral section along the line AA.

In order to facilitate the assembly and removal of the core 6 from the core carrier 1, the edges of the clamping ring 11 are slightly bevelled.

Furthermore, the bushing 5 is shaped so that it serves as a spacer between the individual core carriers 1 on the winding shaft 3. For this purpose, it has on one side a disc-shaped collar 51 on the edge, whose diameter is equal to the outer diameter of the clamping ring 11.

FIG. 4 shows a further embodiment, which is not covered by the invention, a core carrier 1 in an exploded view. The core carrier 1 comprises a clamping ring 11, which is composed of two approximately equal halves or ring portions 11 a, 11 b. In combination, both ring sections 11a, 11b provide a complete self-contained ring. Furthermore, the core carrier 1 comprises a snap ring 12 Spring steel. The snap ring 12 is in an inside groove 14 (see FIG. 5 ) of the clamping ring 11 and the ring sections 11 a, 11 b used. The snap ring 12 consists of a ring-shaped bent strand whose ends are arranged opposite and spaced from each other. In the assembled, unloaded state of the present core carrier is dimensioned such that between the two ring sections 11 a, 11 b at a point of interruption 13 a gap exists, which is about the same size as the distance between the two ring ends of the snap ring 12. For example, this can Distance at a clamping ring diameter of 7.6 cm 4 mm. For reasons of saving material, the ring sections 11a, 11b have on both sides outer recesses 15, which are formed as continuous grooves.

FIG. 5 shows a detailed perspective view of one of the ring portions 11 a, 11 b, which are identical. In particular, on the inside of approximately centrally disposed and uniformly extending groove 14 can be seen, in which the snap ring 12 (see FIG. 4 ) can be used.

The view of FIG. 6 is essentially the same as FIG. 2 , wherein in the embodiment according to FIG. 6 which is not covered by the invention, the core carrier 1 according to FIG. 4 has been used. Insofar, the clamping ring 11 from the FIG. 6 two interruption points 13a, 13b. At the interruption 13b both ring portions 11a, 11b abut against each other, whereas at the point of interruption 13a there is a gap between the two ring portions 11a, 11b. The size of the distance depends on the inner diameter of the core 6 or on the applied by the friction elements 4 radial forces. The remaining elements of the representation from the FIG. 6 correspond to those from the FIG. 2 ,

LIST OF REFERENCE NUMBERS

1

core support

2

group

3

winding shaft

4

friction

5

liner

6

core

11

clamping ring

11a, 11b

ring sections

12

Snap ring / spring element

13a, 13b

breakpoint

14

inside groove

15

recess

21,22,23

recesses

31

pressure hoses

51

disc-shaped collar

Claims (12)

1. Core carrier (1) for tensioning cores (6) for winding up and/or unwinding wound products, in particular web-shaped materials such as adhesive tapes, wherein the core carrier (1) is composed of a tension ring (11) which serves for receiving a core (6) and, being located on a winding shaft (3) serves for transmitting a torque to the core (6), the external running surface of said tension ring (11) having substantially the shape of a linear circular cylinder, wherein the tension ring (11) is designed to be flexible in such a manner that the external diameter of the tension ring (11) may be varied,
   characterized in that the tension ring (11) is configured as a self-contained ring and at least has one recess (21) which extends into the internal and/or external running surface.
2. Core carrier (1) according to Claim 1, characterized in that the tension ring (11) is embodied as a linear circular cylinder.
3. Core carrier (1) according to Claim 1 or 2, characterized in that the tension ring (11) at the external edges thereof is slightly tapered.
4. Core carrier (1) at least according to one of Claims 1 to 3, characterized in that a bushing (5) which is connected to the winding shaft (3) is located between the winding shaft (3) and the tension ring (11), wherein the bushing (5) preferably on the periphery of one side has a disc-shaped flange (51).
5. Core carrier (1) at least according to one of the preceding claims, characterized in that a plurality of recesses (21, 22, 23) which extend into the internal and/or external running surface and provide the flexibility of the tension ring (11) are present in the tension ring (11).
6. Core carrier (1) according to Claim 5, characterized in that the recesses (21, 22, 23) have the shape of blind holes which extend from the internal and/or external running face into the tension ring.
7. Core carrier (1) according to Claim 5, characterized in that the recesses (21, 22, 23) have the shape of slots which are disposed in the axial direction and which extend from the internal and/or external running surface into the tension ring.
8. Core carrier (1) at least according to one of Claims 5 to 7, characterized in that in each case a plurality of recesses (21, 22, 23) are disposed in direct mutual proximity so as to form a group 2, wherein preferably a plurality of these groups 2 are present at regular spacings in the tension ring (11).
9. Core carrier (1) at least according to one of the preceding claims, characterized in that the tension ring (11) is tensioned by a device (31) which is located in the winding shaft (3) and which enables a force which acts in a radially outward manner and which within a wide range is freely selectable to be dispensed in a targeted manner.
10. Core carrier (1) according to Claim 9, characterized in that the device (31) is composed of one or of a plurality of pressure-means hoses which are disposed in the axial direction in the winding shaft (3).
11. Core carrier (1) at least according to one of Claims 9 or 10, characterized in that the transmission of force from the device (31) to the tension ring (11) is performed by way of friction elements (4).
12. Core carrier (1) at least according to one of the preceding claims, characterized in that the tension ring (11) is made of plastics.

Images