EP3233685B1 - Device for receiving an extruded elastomer strand during transport to a processing location - Google Patents

Description

The invention relates to a device for receiving an extruded elastomer strand according to claim 1.

Devices made largely of metal are from the DE 10 2005 028 069 A1 and the DE 10 2013 104 049 A1 known. The coil accommodated in a container can be fixed within the container during transport. In a raised position, it can be rotated within the container and the elastomer strand can be unwound from it. The above-mentioned production plant has stub shafts that can be moved into the container and coil core from the outside for rotating the coil.
When the spool is unwound, the container with the emptied spool is exchanged for a container with a wound spool and the container with the emptied spool is transported back to the manufacturer of the elastomer strand.

Devices with the features mentioned at the outset ES 2 103 160 A1 such as US 3,521,833 A in which the part determining the connection between an end wall part and the coil core is formed by a ring element. With the subject of US 3,521,833 A the ring elements also consist of a stronger material than the other parts of the coil made of cardboard.

The present invention provides a new device of the type mentioned at the outset, which is characterized in that the part designed as a ring element is connected to the end wall part by positive locking and to the coil core by non-positive connection, the end wall part being arranged at a distance from one another at the edge connected Has layer sections and consists of a cutout folded in the manner of a box.

The entire material volume includes pore spaces or the like which are open towards the material surface.

The invention is based on the knowledge that this coil, which is used both for transport and also temporarily as a functional component of the production device, can be made of lighter and thus less stable materials than in the prior art, with sufficient transport and production safety. Foam, cardboard and other fiber materials are particularly suitable for this purpose, which results in a substantially improved ratio between the transport payload and the total transport load of the wound bobbin, with the transport volume of the wound bobbin being approximately the same as in the prior art, which results in improved utilization of the Volume in their resilience allows limited transport spaces of transport vehicles. An even further reduction in the transport effort results from the present invention in that the light materials used permit problem-free disposal of the spool at the processing location of the elastomer strand, thereby avoiding the expense of returning the spool to the manufacturer of the elastomer strand. By doing without the return of the coil, there is the opposite possibility of using lighter, less strong materials, since there are no requirements regarding the durability of the coil. Despite disposal of the coil, the overall effort for transporting and processing the elastomer strand is reduced.

In a preferred embodiment, the coil, based on its mass, consists at least predominantly of material with a density <2.0 g / cm ³ , preferably a density <1.5 g / cm ³ , in particular <1 g / cm ³ .

The mass fraction of the material is preferably over 60%, in particular over 70%.

In a further preferred embodiment of the invention, at least one part that is directly stressed by contact with the manufacturing system has a material with higher strength than the other parts of the coil.

This at least one part is formed by a ring element, via which a coil core and an end part of the coil are connected to one another.

Such a construction can advantageously be produced with little construction and material costs, for example by only the ring element needs to be made of a higher quality material that is stronger than the material of the coil core and the end parts.

In particular, the ring element can consist of a plastic, preferably recycled plastic, while the coil core and the end parts are made of cardboard and / or foam material. Such coils can advantageously be disposed of at the processing site after a temporary installation in the production system with little effort, the parts preferably being disposed of in a material-specific manner, which enables problem-free recycling of the materials.

In one embodiment of the invention, the coil core is at least partially hollow cylindrical and in particular axially attachable to an outer circumferential surface of the ring element.

In such a construction, the end part can be enclosed between a flange of the ring element and the end edge of the attached coil core.

In order to secure the connection between the coil core and the ring element, a releasable latching can expediently be produced, the latching connection in particular having a latching tongue that can be bent into the peripheral surface for latching into an opening in the cylinder wall of the coil core.

In a further embodiment of the invention, the latching tongue has an opening aligned with the opening on the cylinder wall for the passage of an end section of the elastomer strand. In this way, the opening provided in the cylinder wall of the coil core can advantageously be used both for latching and for carrying out the end of the elastomer strand in order to fix the end of the elastomer strand on the inside of the winding.

A web can be formed along the edge of the opening in the latching tongue, which web forms a ramp through which the latching tongue can be bent when the hollow cylindrical coil core is pushed onto the ring element.

In a circumferential direction in front of and behind the latching tongue and at a distance from it, one or more projections can extend from the circumferential surface for engagement in end slots in the cylinder wall of the coil core. It is advantageously ensured by such projections forming a guide that the opening in the cylinder wall of the coil core always comes to coincide with the latching tongue or the opening formed therein.

In a further advantageous embodiment of the invention, projections for internal clawing with the cylinder wall of the coil core are provided on the circumferential surface, distributed over the circumferential surface.

The ring element can be formed on the inside for the rotationally fixed engagement of a stub shaft of a holding and, if necessary, rotary drive device of the production plant mentioned, deviating from a circular cross-section, it being possible that the engagement can only take place in a single correct position in which the stub shaft has space for the offers protruding end of the elastomer strand to the inside of the ring element.

The inside of the ring element can have a toothing for the drive through the stub shaft and possibly an axial stop for the stub shaft.

It goes without saying that the ring element has a recess aligned with the latching tongue or opening in the latching tongue, which enables the latching tongue to be bent into the peripheral surface and creates space for the end of the elastomer strand.

A packaging container which receives the wound bobbin preferably consists entirely of material with a density of <2.5 g / cm ³ , preferably of foam, cardboard or other fiber material, the packaging container also being provided for disposal at the processing location.

For example, the packaging container has vertical supports, in particular four vertical corner supports, in order to form reinforcements for stacking the packaging containers on top of one another and to form spacers which keep the end parts of the coil at a distance from the relevant side wall.

The packaging container can be designed with or without a bottom wall. In the latter case, it can be put over the coil from above for packaging.

The packaging container can have openings aligned with the ring element, which enable the containers to be unstacked by means of a holding bracket.

In a particularly preferred embodiment, the coil core can be inserted axially into a ring pocket of the ring element for connection to the ring element. The front end of the at least partially hollow cylindrical coil core can advantageously be clamped in the ring pocket. In contrast to the exemplary embodiment of a coil described above, the load of the coil core can be removed by the ring element not only on the upper half side but also on the lower half side of the coil core.

For the clamping, the ring pocket can have clamping elements projecting radially inwards, in particular distributed over the ring circumference, wherein preferably opposite inner walls of the ring pocket projecting clamping elements are arranged offset in the circumferential direction to one another.

The ring element can be used for connection to the end wall part in an opening of the end wall part up to the stop of the end wall part against a flange and / or a step shoulder.

According to the invention, the end wall part has two layer sections arranged at a distance from one another and connected to one another at the edge and consists of a cutout, preferably a cutout made of cardboard, folded in the manner of a box.

In this embodiment, the outer layer section of the end part can be provided for abutment against the flange and the inner layer section of the end part for abutment against the step shoulder of the ring element.

In a further advantageous embodiment of the invention, said opening of the end wall part is arranged eccentrically with respect to the end wall part. This measure makes it possible to prevent the elastomer strand wound onto the spool from projecting downwards, beyond the end wall parts of the spool, or resting on a base carrying the spool. The latter could only can be prevented by less winding of the coil. The above-mentioned measure allows the coil's absorption capacity to be fully utilized.

In a further advantageous embodiment of the invention, the ring element has, in a rotational position relative to the end wall part, stop elements engaging behind the layer sections of the end wall part. Through these stop elements, the ring be connected to the end wall part in the manner of a bayonet catch. The ring element preferably also has devices for latching the end wall part to the ring element in the rotational position.

To drive the coil, a toothing coaxial with the ring axis for engaging a correspondingly toothed drive element for rotating the coil is preferably provided on the ring element, wherein the toothing has an angular division <2 °. With such a tight toothing, it is advantageously possible to dispense with a separate alignment of the coil with the drive element before the engagement. Small misalignments of the order of magnitude of 1 ° can easily be compensated for automatically.

The spools described above can be used to carry out a method in which an elastomer strand wound onto a spool is transported to a processing location and the wound spool is temporarily incorporated into a production system which continuously rotates the spool to seal seals on doors or trunk areas of vehicle bodies by rotating the spool processed, the bobbin being removed from the production system after the elastomer strand has been unwound, broken down into individual parts and disposed of.

Fig. 1

ein Ausführungsbeispiel für eine Spule einer Vorrichtung in perspektivischer Darstellung,

Fig. 2

die Spule von Fig. 1 in drei verschiedenen, zueinander senkrechten Ansichten,

Fig. 3

ein in der Vorrichtung von Fig. 1 verwendetes Ringelement,

Fig. 4

die Einführung der bewickelten Spule von Fig. 1 in einen Behälter erläuternde Darstellungen,

Fig. 5

die Entnahme der bewickelten Spule von Fig. 1 aus dem Behälter und den Einbau der Spule in eine Halte- und Drehantriebseinrichtung erläuternde Darstellungen,

Fig. 6

ein Ausführungsbeispiel für eine Spule einer erfindungsgemäßen Vorrichtung in perspektivischer Darstellung,

Fig. 7

ein aus einem Pappenausschnitt gefaltetes Stirnwandelement der Spule von Fig. 6 sowie den Pappenausschnitt,

Fig. 8

ein in der Spule von Fig. 6 verwendetes Ringelement in verschiedenen perspektivischen Ansichten sowie einer Schnittansicht,

Fig. 9

ein Detail des Ringelements von Fig. 8,

Fig. 10 - 12

die Montage der Spule von Fig. 6 erläuternde Darstellungen,

Fig. 13

eine die Verpackung der Spule von Fig. 6 in einem Behälter erläuternde Darstellung, und

Fig. 14

die Spule von Fig. 6 mit Antriebseinrichtungen zur Drehung der Spule.

The invention is further explained below using exemplary embodiments and the accompanying drawings relating to these exemplary embodiments. Show it:

Fig. 1

an embodiment of a coil of a device in perspective view,

Fig. 2

the coil of Fig. 1 in three different, mutually perpendicular views,

Fig. 3

one in the device of Fig. 1 used ring element,

Fig. 4

the introduction of the wound coil from Fig. 1 representations in a container,

Fig. 5

the removal of the wound bobbin from Fig. 1 explanatory explanations from the container and the installation of the coil in a holding and rotary drive device,

Fig. 6

an embodiment of a coil of a device according to the invention in perspective view,

Fig. 7

an end wall element of the coil of Fig. 6 as well as the cardboard cutout,

Fig. 8

one in the coil of Fig. 6 used ring element in different perspective views as well as a sectional view,

Fig. 9

a detail of the ring element from Fig. 8 ,

Figures 10-12

the assembly of the coil of Fig. 6 explanatory representations,

Fig. 13

a the packaging of the coil of Fig. 6 in a container explanatory representation, and

Fig. 14

the coil of Fig. 6 with drive devices for rotating the spool.

A coil 2 provided for receiving a winding from an elastomer strand 1 for forming seals on vehicle bodies comprises a hollow cylindrical coil core 3 and two matching end wall parts 4, 4 '. The coil core 3 and the end wall parts 4, 4 'consist of cardboard material, the cylinder wall of the hollow cylindrical coil core 3 being formed from spirally wound, interconnected tracks. The cylinder wall of the coil core could also be made homogeneously from fiber material.

The coil core 3 is connected at its ends to the end wall parts 4, 4 'in each case via a ring element 5 or 5'. In the exemplary embodiment shown, the correspondingly formed ring elements 5, 5 'consist of a recycled plastic and are produced in one piece by injection molding.

The connection between the coil core 3 and the end wall parts 4,4 'through the ring elements 5,5' is established in that the end wall parts 4,4 'each between a flange 6 or 6' of the ring elements 5,5 'and the relevant end edge surface of the hollow-cylindrical coil core 3, which is pushed onto a peripheral surface 25 of the ring elements 5, 5 '. Furthermore, in order to secure this form-fitting connection, a latching tongue 7, which is formed in each case on the ring elements 5, 5 ′ and can be bent into the peripheral surface 25, engages in an opening 8 in the cylinder wall of the coil core 3. The latching tongue 7 itself has an opening 9 which, when locked, is aligned with the opening 8 in the cylinder wall of the coil core 3 and serves to receive and fix the end of the elastomer strand 1 located inside the winding.

On one side of the opening 8, the cylinder wall of the coil core 3 has an end slot 10, in which a web projection 11 of the ring element 5, 5 'engages. This ensures that the openings 8 and 9 coincide.

The coil core 3 is formed with the openings 8 and end slots 10 symmetrically with respect to a central plane.

To secure the connection between the ring elements 5, 5 'and the coil core 3, protrusions 12, which are distributed over the circumference of the ring elements 5, 5' and through which the ring element 5, 5 'claws in the cardboard material of the cylinder wall of the coil core 3, also contribute.

On the inside, the ring elements 5, 5 'have pockets 13 forming a toothing for the engagement of the shaft 2, which rotatably supports and possibly drives shaft stubs ( Fig. 5c ), which can be inserted into the ring element 5,5 'up to a stop 14.

Between two of the pockets 13, a recess 15 is formed which is aligned with the latching tongue 7 with the opening 8 and through which space for accommodating the above-mentioned elastomer strand end is formed.

One among others in Fig. 4 The container 16 shown is used to package the spool 2 wound with the elastomer strand 1. The container 16 has four cardboard side walls 17. Inside the container there is a square support 18 made of wood or cardboard material at each of the four vertical corners.
A two-leaf container lid is not shown in the figures.
The container 16 can have a bottom or be open on the underside. In any case, it can be placed on a pallet 19, in the example shown on a wooden pallet.

If there is a base, the wound coil 2 can be lowered into the container 16 on a holding bracket 20 which engages in the ring elements 5,5 ', the end wall parts 4,4' being spaced apart by the square supports from the relevant side wall of the Container 16 are held. This provides space for the flange 6 of the end wall parts 4, 4 'which is slightly projecting ring elements 5,5 'and for the relevant parts of the bracket 20.

If the container 16 does not contain a base, it can be placed on the spool, so that the spool resting on the pallet 19 with respect to the container 16 is the same as in FIG Fig. 4b shown position.

According to Fig. 5a a bracket 20 can also be used to remove the wound coil 2 at the processing location. Alternatively, the cardboard side walls 17 according to FIG Fig. 5b including the square supports only torn away to the side according to arrows 21.

The exposed coil 2 is then in accordance Fig. 5c installed in a holding and rotary drive device 22, which is part of a manufacturing system that continuously processes the elastomer strand 1 to form seals on vehicle bodies. Shaft stubs 23 engage in the two ring elements 5, 5 '. The shaft ends 23 can be raised and lowered according to arrow 24 and at least one of the shaft ends forms a rotary drive when the wound coil 2 is raised.

A device corresponding to the holding and rotary drive device 22 can be used by the manufacturer of the elastomer strand 1 to wind the elastomer strand onto the spool 2.

As in Fig. 5a is indicated by a dashed line at 27, the container 16 can have on both side walls opposite the ring elements 5, 5 'an opening aligned with the relevant ring element or at least one perforation to form such an opening. The container can thus be raised or lowered by a holding bracket corresponding to the holding bracket 20 for the purpose of stacking or unstacking.

Fig. 6 shows one of the coil 2 of Fig. 1 similar coil 2a for receiving an elastomer strand 1a. The coil 2a has a hollow cylindrical coil core 3a which, like the coil core 3 of the coil 2 from Fig. 1 consists of spirally wound cardboard material. End wall parts 4a and 4a 'likewise made of cardboard are each connected to one another via a ring element 5a or 5a'. Like the ring elements 5, 5 ', the ring elements 5a, 5a' consist of the coil 2 of Fig. 1 made of recycled plastic and are made in one piece by injection molding.

The end wall parts 5a, 5a ', one of which is separately in Fig. 7a is shown, in contrast to the coil wall parts 5,5 'of the coil 2 of Fig. 1 not from a single cardboard material layer but from a cardboard cutout 28 folded in the manner of a box, as shown in FIG Fig. 7b is shown.

The cardboard cutout 28 has octagonal sections 29 and 30 which are connected to one another via an intermediate section 31 delimited by folded edges. Each of the sections 29, 30 additionally has three foldable attachment sections 32, the attachment sections 32 of the section 29 each being provided with an immediate tab 33 and between the section 30 and the three attachment sections 32 of the section 30 in each case a receiving slot 34 for one the tabs 33 is formed. This can be done by folding around the fold edges shown in dashed lines Fig. 7a Produce the illustrated octagonal end wall part 5a or 5a '.

As Fig. 7 it can be seen that the sections 29, 30 form two spaced-apart layers of the end wall part 5a or 5a 'and each have a circular opening with different inner diameters, through which an opening 35 of the folded end wall part is formed. As explained below, the center of the circular opening is not exactly in the center of the octagonal sections 29, 30 forming the layers, but is arranged eccentrically to these sections. In the example shown, three lugs 36 protrude from the edge of the relevant opening of section 30, which can be angled by 90 ° in such a way that they rest in the folded end wall part 5a or 5a 'as a stabilizing spacer against the other section 29.

In addition to the lugs 36, the opening in the section 30 of the cutout 28 has three edge recesses 37 which, like the lugs 36, are arranged at an angular distance of 120 ° from one another. Edge recesses 38 in the same arrangement to one another but offset by 60 ° from the edge recesses 37 also have the opening in section 29.

Fig. 8 shows in three different views one of the two matching ring elements 5a, 5a '. The ring elements have an outer circumferential surface 40 from which a flange 41 projects radially outwards on the outer ring edge of the ring element. The outer peripheral surface 40 is also with an in Fig. 8b visible step 42 provided.

A ring pocket 43 opens toward the inner end face of the ring element 5a or 5a '. Clamping webs 44 protrude from mutually opposite inner walls of the ring pocket 43, the clamping webs 44 being distributed over the circumference of the ring element and the clamping webs on the one inner wall opening up to the clamping webs the opposite inner wall of the ring pocket 43 are arranged offset.

Adjacent to the inner end wall, to which the ring pocket 43 opens, the ring element is reinforced by a radially inwardly projecting ring shoulder 45, the ring shoulder having a cavity which is open to the outside of the ring element and is interrupted by support webs 46 distributed around the ring circumference . Such a cavity, which avoids material accumulations, with support webs 47 distributed around the circumference of the ring element also opens to the outer end face of the ring element, this cavity being closed off from the step element 42 on the inside of the ring element.

On the outer end face of the ring element there is a toothing 48 coaxial with the ring axis, 360 teeth being formed in the example shown. Each tooth has an angular range of 1 °. The teeth serve to drive the coil 2a by means of a correspondingly toothed drive element.

On the inner edge of the peripheral surface 40 of the ring element 5 or 5a ', there are three stop tabs 49 projecting radially outwards at an angular distance of 120 °.

At three interruptions of the flange 41 provided at an angular distance of 120 °, an angled web 51 projects from the peripheral surface 40, to the axially extending bend 52 of which a locking element 53 is connected, which can be pivoted elastically axially outward about a film hinge 54. The angled webs 51 are arranged offset by 60 ° to the stop tabs 49.

To assemble the coil 2a, the end wall parts 4a, 4a 'are first connected to the ring elements 5a, 5a'. For this purpose, the ring elements are inserted axially from the outside into the opening 35 of the relevant end wall part. Because the inside diameter of the opening in section 30 is larger than the inside diameter of the opening in section 29, the stop tabs 49 can pass through the former opening unhindered. The following are then align the ring element and the end wall part to one another such that the stop tabs 49 can pass through the edge recesses 38 in the opening in the section 29.

In the alignment position mentioned, the edge recesses 37 in section 30 are aligned with the angled webs 51, so that these webs, as in FIG Fig. 10 shown, can pass through the edge recesses 37 in the section 30 of the end wall part, with the latching elements 53 being pivoted out.

To produce a firm connection between the ring elements and the end wall parts, the end wall parts are finally rotated against the ring elements, so that the stop tabs 49 and the webs 51 engage behind the sections 29 and 30 of the end wall part in the manner of a bayonet catch. In the rotated state, in which the webs 51 then engage behind the section 30, the three latching elements 53 can then pivot back into the edge recesses 37, so that the end wall part is fixed on the ring element in the relevant rotational position by the latching element 53 against the one edge section 55 of the edge recess 37 abuts. The section 29 is axially enclosed between the stop tabs 49 and the stepped shoulder 42, the section 30 between the flange 41 and the webs 51.

The end wall parts 4a, 4a 'with the inserted ring elements 5a, 5a' can then according to Fig. 12 on the foreheads 39 of the in Fig. 11 sections of the hollow cylindrical coil core 3a shown separately are pushed on axially. The projecting clamping webs 44 ensure a firm clamping connection.

When connecting the coil core 3a to the end wall parts 4a, 4a ', it is only necessary to ensure that the end wall parts 4a, 4a' are aligned with one another such that the intermediate sections 31 extend parallel to one another in the longitudinal direction. The coil 2a is expediently mounted on a floor in such a way that the intermediate sections 31 point upwards. On the opposite side, the connection between the sections 29, 30 made by tabs and slots is then additionally secured against unintentional loosening by the coil resting on the floor.

Fig. 13 shows the coil 2a wound with the sealing strand material 1a, which lies on a carrier pallet 57 with an upwardly projecting ring edge 58. For packaging, a box part 56 which is open at the top and bottom and forms side walls is placed, the lower edge of which rests on the inside of the ring edge 58 on the carrier pallet 57. A lid 61 secured by fastener tapes 59, 60 closes the packaging at the top. The ring edge 58 could be formed by a part corresponding to the cover 61 and connected to a lower wooden part of the carrier pallet 57, which is turned by 180 ° with respect to the cover 61.

When unpacking, after loosening the closure straps 59, 60 and removing the cover 61, the box part 56 is finally lifted up, folded up and disposed of.

Fig. 14 shows drive elements 62 of a production device engaging in the ring elements 5a, 5a ', by means of which the coil 2a is raised, held and rotated. The drive elements 62 have stub axles (not shown) with a step shoulder on which a toothing corresponding to the toothing 48 is formed. Advantageously, no special alignment of the coil to this drive toothing is required. A misalignment, which is in any case below half a degree, can easily be compensated for by the play of the drive element carrying the drive toothing.

The drive described above is based on both positive and non-positive. It goes without saying that with increasing fineness of the angular division of the toothing, the drive changes into a purely non-positive drive.

Claims (13)

1. Device for receiving an extruded elastomer strand during the transport thereof to a processing location, having a reel (2, 2a), which receives the elastomer strand (1, 1a) as a coil, wherein the wound reel (2, 2a) is provided for temporary inclusion in a production facility that continuously processes the elastomer strand (1, 1a), while the reel is rotated (2, 2a), to form seals on doors or trunks of vehicle bodies,
   wherein at least one part (5, 5a) and in each case which is decisive for the connection between a reel core (3, 3a) and an end wall part (4, 4a) of the reel (2, 2a) is composed of a stronger material than the remaining parts of the reel (2, 2a), the at least one part (5, 5a) is formed by a ring element (5, 5a), via which a reel core (3, 3a) that is at least partially hollow-cylindrical and an end wall part (4, 4a) are connected to one another to form the reel (2, 2a), wherein the average density of the reel (2, 2a) resulting from the quotient of the total mass and the total volume of the material of the reel (2, 2a) is <2.5 g/cm³,
   characterized in that the part (5, 5a) is connected to the end wall part (4, 4a) by positive engagement and to the reel core (3, 3a) by nonpositive engagement wherein the end wall part (4a, 4a') has two layer segments (29, 30), which are arranged at a distance from one another and are connected to one another at the edge, and comprises a cutout (28) folded in the manner of a box.
2. Device according to Claim 1,
   characterized
   in that the reel (2, 2a) is composed predominantly or entirely of material with a density of <2.0 g/cm³, in particular <1.5 g/cm³, preferably <1 g/cm³, based on its mass.
3. Device according to Claim 2,
   characterized
   in that the percentage by mass of the material is over 60%, preferably over 70%.
4. Device according to one of Claims 1 to 3,
   characterized
   in that the material is a paperboard, foam and/or fiber material.
5. Device according to one of Claims 1 to 4,
   characterized
   in that the part (5, 5a) is a part which is stressed directly by contact by being included in the production facility.
6. Device according to one of Claims 1 to 5,
   characterized
   in that, for connection to the ring element (5, 5a), the reel core (2, 2a) can be placed axially on an outer circumferential surface (25) of the ring element (5) or inserted into a ring pocket (43) of the ring element (5a) .
7. Device according to one of Claims 1 to 6,
   characterized
   in that, for connection to the end wall part (4a, 4a'), the ring element (5a, 5a') can be inserted axially into an opening (35) in the end wall part (4a, 4a') until the end wall part (4a, 4a') strikes against a flange (41) and/or a stepped offset (42) on the ring element (5a, 5a').
8. Device according to one of Claims 1 to 7,
   characterized
   in that the outer layer segment (30) of the end part (4a, 4a') is provided for striking against the flange (41), and the inner layer segment (29) of the end part is provided for striking against the stepped offset (42) of the ring element (5a, 5a').
9. Device according to Claim 7,
   characterized
   in that the opening (35) in the end wall part (4a, 4a') is arranged eccentrically with respect to the end wall part.
10. Device according to one of Claims 1 to 9,
    characterized
    in that the ring pocket (43) has radially inward-projecting clamping elements (44) distributed over the ring circumference, wherein clamping elements (44) projecting from mutually opposite inner walls of the ring pocket (43) are preferably arranged offset relative to one another in the circumferential direction.
11. Device according to one of Claims 1 to 10,
    characterized
    in that, in one rotational position relative to the end wall part, the ring element (5a, 5a') has stop elements (49, 51) which engage behind the layer segments (29, 30) of the end wall part (4a, 4a').
12. Device according to Claim 11,
    characterized
    in that the ring element (5a, 5a') comprises devices (53, 54) for latching the end wall part (4a, 4a') in the rotational position on the ring element (5a, 5a').
13. Device according to one of Claims 1 to 12,
    characterized
    in that the ring element (5a, 5a') has a toothing (48) coaxial with the ring axis and having axially projecting teeth for the engagement of a correspondingly toothed drive element (62) for driving the reel (2a) in rotation, wherein the angular pitch of the toothing is so fine that misalignments of the drive element due to backlash are automatically compensated and, in particular, the toothing has an angular pitch of <2°.

Images