EP0018400B1 - Bobbin support with carrier elements parallel to its axis - Google Patents

Abstract

A support for a thread bobbin is provided in parallel to its shaft with carrier elements interconnected between each other; the isolated carrier elements (1, 25, 40) are compressed in the circonferential direction; the coupling pieces (4, 7; 10; 15; 29, 30-33) are provided between each two neighbouring similar carrier elements; the space between each two neighbouring carrier elements is larger than the dimension of a carrier element.

Description

The invention relates to a winding carrier, which can be partially inserted in the axial direction into a winding carrier of the same design, with supporting elements running parallel to its axis and connected to one another via essentially dimensionally stable coupling pieces, which protrude radially outwards into a common cylindrical surface and form a winding surface, whereby the distance between two adjacent support elements is greater than the dimension of a support element in the circumferential direction, the maximum outer diameter of the coupling pieces in one end region of the winding support being equal to or smaller than the diameter of the cylinder surface on which the inner surfaces of the support elements in the other end region of the winding support lie, while at the other end a radially outwardly projecting beyond the support elements flange is provided, to which the support elements are connected and which has openings which are open radially inwards and which accommodate the support elements of the serve to be inserted winding carrier.

In a known winding support of this type for thread and yarn winding (FR-A-2 289 423), the support elements are rod-shaped and are coupled at one end by a dimensionally stable annular flange.

This winding carrier makes it possible to be partially inserted into an identical winding carrier in the axial direction. It is thus possible to shorten the axial starting length of several winding carriers placed one above the other by compressing and intermeshing. The diameter of this winding carrier is essentially rigid. He can not follow a shrinkage of the yarn package by giving in the radial direction.

Furthermore, winding carriers are known, which can be compressed in the radial direction, but do not allow an axial compression of one winding carrier in the axial direction into another.

Winding carriers of this type are disclosed in FR-A-2168 682 and 2 290 381. They have dimensionally stable end rings at their two ends, between which support elements run parallel to the winding carrier axis and are U-shaped in cross section, the legs of their profile pointing radially inwards. The adjacent legs in the circumferential direction of two such support elements are connected to one another by dimensionally stable coupling pieces. The supporting elements have their weakest cross section in the areas of their connection to the end rings. The consequence of this is that the supporting elements, with the exception of their end ring regions, are then displaced radially inward when a winding located on the winding carrier exerts a corresponding radially inward force. During this displacement of the support elements, the legs of each of these elements are pressed towards one another.

Furthermore, a winding support is known (US-A-3 563 490), in which the support elements are supported on an inner body via intermediate elements which are flexible in the radial direction. This winding carrier also does not offer the possibility of being partially inserted axially into a winding carrier of the same design. Axial compression of the coils arranged thereon is consequently not possible.

Finally, a winding carrier is known (FR-A-1085398), the winding surface of which is formed from rods running parallel to its axis, which are connected at one end by an outer slotted ring. Near its other end, the bars are inclined radially inward. Here is another ring is provided, which also has a slot and the rods rest on the outer edge.

With this winding carrier, it is possible to have the end with the inwardly inclined rods engage in the other end of an adjacent winding carrier. The intermeshing therefore extends only to the end regions of the winding carriers. When such winding carriers are further compressed, however, the support on the non-rigid end rings results in complex inclined positions of the rods, which can lead to jamming.

In contrast, the object of the present invention is to provide a winding carrier which, in conjunction with similar winding carriers, permits trouble-free compression of the thread and yarn packages located thereon in the axial direction and also their shrinking in the radial direction, the two effects not necessarily being coupled. This should be achieved with a simple structure and thus with ease of manufacture of the winding carrier.

This object is achieved in accordance with the invention in the case of a winding carrier of the type mentioned at the outset in that each support element is formed from two connected legs which can be pressed together in the circumferential direction, in that the coupling pieces each have one end with the free end of a leg of a support element and the other end with the free end of the leg facing the same coupling piece of the adjacent support element in the circumferential direction, and that the flange is divided into essentially dimensionally stable flange segments, wherein one flange segment is connected between two adjacent support elements and each connected at its radially inner ends to a support element in a hinge-like manner is, the flange segments are designed so that they allow compression of the flange in the circumferential direction.

Several winding carriers of this type can be pushed into each other to the desired degree, so that the axial length of the to reduce thread and yarn packages on it. The axial compression and the radial compression do not interfere with each other in any way.

The winding support according to the invention can also be designed such that adjacent flange segments overlap relative to one another so as to be displaceable in the circumferential direction.

It follows that, regardless of whether or how far it is compressed in the radial direction, each winding support results in a continuous rolling surface protruding radially outward beyond the winding surface, which can work together with a winding drum without difficulty.

The winding support according to the invention can also be designed such that the coupling pieces are designed as ring segments. This results in a simple, stable construction of the winding carrier.

The winding carrier according to the invention can also be designed such that the coupling pieces are connected with flexible buckling elements which are supported on at least one rigid guide ring arranged radially inwards. In this way, secure guidance of the winding support on the respective support member is achieved, on the one hand, and reliable support of the support elements, on the other hand.

• Fig. 1 eine teilweise im Schnitt dargestellte Ansicht einer ersten Ausführungsform des erfindungsgemässen Wickelträgers nach der Linie 1-1 in Fig. 2,
• Fig. 2 eine Schnittansicht nach der Linie 2-2 in Fig.1,
• Fig. 3 eine teilweise im Schnitt dargestellte Ansicht einer zweiten Ausführungsform des erfindungsgemässen Wickelträgers nach der Linie 3-3 in Fig. 4 und
• Fig. 4 eine Schnittansicht nach der Linie 4-4 in Fig. 3.

In the following part of the description, some embodiments of the winding support according to the invention are described with reference to drawings. It shows:

• 1 is a partially sectioned view of a first embodiment of the winding support according to the invention along the line 1-1 in Fig. 2,
• 2 shows a sectional view along the line 2-2 in FIG. 1,
• Fig. 3 is a partially sectioned view of a second embodiment of the winding support according to the invention along the line 3-3 in Fig. 4 and
• 4 shows a sectional view along the line 4-4 in FIG. 3.

The embodiment of the winding support according to the invention according to FIGS. 1 and 2 has supporting elements 1 running parallel to the axis of the winding support. Each support element 1 has a V-shaped cross section, which is open radially inwards. It is thus formed by two legs 2 which can be pressed together in the direction of one another. The support elements 1 have radially outer apex surfaces 3 which lie on a common cylindrical envelope surface.

All support elements 1 of the winding support are coupled at one end by flange segments 4, one of which is arranged between two support elements 1. These flange segments 4 are essentially dimensionally stable. They each have a radially inward opening 5, which is slightly larger than the dimensions of a support element 1 in the non-compressed position. It follows from this that the openings 5 advantageously also have a V-shaped configuration. The flange segments 4 project radially outward beyond the envelope surface common to the supporting elements 1. At their radially inner circumferential edges 6, they are connected in a hinge-like manner to a respective support element 1, so that the position of the leg 2 of such a support element 1 relative to the associated flange segment 4 can easily be changed by compressing the support element 1.

As can be seen in particular from FIG. 1, the support elements 1 are connected in addition to the flange segments 4 by two ring-like coupling pieces 7. These elements are composed of ring segments, each of which extends between the mutually facing legs 2 of adjacent support elements 1. They lie with their inner surface 8 essentially on the same cylindrical surface as the inner surfaces of the support elements 1, so that a ring-like coupling piece 7 can be used as a maximum limitation for the pushing together of two identical winding carriers.

The embodiment according to FIG. 1 also provides a further ring-like coupling piece 9, which is arranged in the region of the end of the winding carrier that is remote from the flange segments 4 and causes additional stiffening. This coupling piece 9 is also composed of ring segments, but these are arranged such that the outer diameter of this coupling piece 9 is equal to or smaller than the diameter of the cylinder surface on which the inner surfaces of the support elements 1 lie. In the area of the coupling piece 9, the radially outer ends of the support elements have a bevel 10 '.

Two axially aligned winding carriers, according to the embodiment according to FIGS. 1 and 2, can be partially pushed into one another, namely by inserting the support elements 1 of the winding carrier into the openings 5 of the flange segments 4 of another winding carrier. One winding carrier can then be pushed into the other until the front ends of the support elements 1 meet a boundary, in particular a coupling piece 7.

If a radially effective pressure is now exerted on the winding support, the legs 2 of each support element 1 are pressed towards one another. The flange segments and the coupling pieces do not take part in this deformation. This deformation also does not affect the relative axial displaceability between two winding carriers.

The embodiment of the winding support according to the invention according to FIGS. And 4 also has support elements 1 with two legs 2 each, as was described in connection with the embodiment according to FIGS. 1 and 2. In this case, however, all the support elements of the winding support are coupled near its one end by essentially dimensionally stable flange segments 10, one of which is arranged between two support elements 1. These flange segments 10, like the flange segments 4, have the design 1 and 2 a breakthrough 5, which is slightly larger than it corresponds to the dimensions of a support element 1 in the non-compressed position.

The flange segments 10 differ from those of the previously described embodiment only in that they each have a radially outer section 11, which has an arcuate outer surface 12. These outer surfaces 12 of the flange segments 10 lie on a common cylinder surface, the axis of which corresponds to that of the winding support. 3 and 4, right side, in particular, each flange segment 10 forms in the region of its section 11 in the circumferential direction at its one end a projection 13 and at its other end a projection 14 offset from the projection 13. These projections 13, 14 form one Flange segments 10 work together with correspondingly formed projections 13, 14 of the adjacent flange segment 10, the projections 13, 14 of adjacent flange segments 10 then overlapping. In this way, the flange segments 10 in their entirety form a continuous cylindrical surface over which the winding support can be driven. By overlapping the projections 13, 14 of adjacent flange segments 10, a continuous contact surface is maintained even when the winding carrier is compressed radially.

3 and 4 has a ring-like coupling piece 15, which is composed of ring segments, each of which extends between the legs 2 of adjacent support elements 1.

Finally, a further coupling piece 16 is provided in the region of the end of the winding carrier which is remote from the flange segments 10 and, as already described in connection with FIGS. 1 and 2, is composed of ring segments. On each ring segment of the coupling piece 16, an edge 17 of a V-shaped profiled buckling element 18 is fastened, the other edge 19 of which is fastened to a central guide ring 20, which runs concentrically to the axis of the winding carrier and to the coupling piece 16. The guide ring 20 serves for exact guidance of the entire winding support and also for supporting the segments of the coupling piece 16.

If a radially effective pressure is now exerted on this winding support, the legs 2 of each support element 1 are pressed towards one another. The mutually adjacent flange segments 10 are displaced relative to one another, the projections 13, 14 of these flange segments 10 shifting relative to one another and thereby maintaining a continuous rolling surface. At the same time, the buckling elements 18 are compressed in the radial direction. The coupling pieces 15 and 16 do not change their shape during this deformation of the entire winding support.

In all of the described embodiments, a thrust ring (not shown) can be placed on the winding support, which, due to the radially inwardly open grooves, permits a radially inward displacement of the support elements and thereby maintains a continuous rolling surface. Such a thrust ring, which must exceed the largest diameter of the winding carrier, enables the winding carrier to be driven by a roller-shaped rotating body, results in considerable stabilization and promotes trouble-free unwinding, since this ring prevents any jamming.

The winding carriers according to the described embodiments are expediently made of plastic, but can also be made of any other suitable material.

Claims (4)

1. A coil carrier axially partially insertable in a coil carrier of like construction, comprising supporting elements (1) which extend parallel to its axis, are interconnected by substantially dimensionally stable coupling members (7, 9; 15, 16), project radially outwardly into a common cylindrical surface and define a winding surface, the spacing between two adjacent supporting elements (1) being larger than the dimension of a supporting element (1) in the circumferential direction, wherein at one end zone of the coil carrier the maximum external diameter of the coupling members (9, 16) is equal to or less than the diameter of the cylindrical surface on which the inner faces of the supporting elements (1) lie at the other end zone of the coil carrier, whereas at the other end zone there is a flange which projects radially outwardly beyond the supporting elements (1), to which the supporting elements (1) are connected and which comprises radially inwardly open apertures (5) serving to receive the supporting elements (1) of the coil carrier that is to be inserted, characterised in that each supporting element (1) is formed from two interconnected limbs (2) which can be pressed together in the circumferential direction, that a respective one end of the coupling members (7, 9; 15, 16) is connected to the free end of one limb (2) of a supporting element (1) and the other end to the free end of that limb (2) of the circumferentially adjacent supporting element (1) which faces the same coupling member, and that the flange is divided into substantially dimensionally stable flange segments (4; 10), a respective one flange segment (4; 10) being interposed between two adjacent supporting elements (1) and being hingeably connected at its radially inwardly disposed ends to a supporting element (1), the flange segments (4; 10) being so constructed that they permit circumferential compression of the flange.

2. A coil carrier according to claim 1, characterised in that adjacent flange segments (10) overlap each other relatively displaceably in the circumferential direction.

3. A coil carrier according to claim 1 or 2, characterised in that the coupling members (7, 9; 15, 16) are in the form of annular segments.

4. A coil carrier according to any preceding claim, characterised in that the coupling members (16) are connected to flexible dog-leg elements (18) which are supported on at least one radially inwardly offset rigid guide ring (29).

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