EP0177797A1 - Device for storing and delivering threads, especially for textile machines - Google Patents

Abstract

A thread storage and delivery device, in particular for textile machines, has a storage drum (4) which bears a number of elongated thread support elements which are arranged at equal radial distances from the drum axis (11) and are distributed uniformly in the circumferential direction and which are located in a thread support area (13) Form a thread support for several turns of a storage roll. In order to achieve a simple, low flywheel construction of the storage drum, the thread support elements are formed by narrow brackets (12) which are attached at least at one end to the drum body (5) and at the other end to the drum body or a part connected to it.

Description

The invention relates to a thread storage and delivery device, in particular for textile machines, with a storage drum which has a number of elongate thread support elements which are arranged at equal radial distances from the drum axis and in the circumferential direction evenly distributed and which are held essentially at least at one end in a drum axis direction are and which form a thread support for a plurality of turns of a storage winder in a thread support area, as well as thread supply and discharge elements assigned to the storage drum on the thread feed or removal side, and with a drive device for achieving a relative rotational movement between the storage drum and the thread feed or -discharge elements.

Thread delivery devices are known (DE-PS 24 61 746), the storage drum of which is designed in the form of a cylindrical rod cage, on the rods of which a thread coming from a supply spool can be wound tangentially to form the storage roll. The rods are at a radial distance from the hub part of the cylindrical drum body, which has an upper and a lower ring flange, in which the rods are held at the ends. In the thread support area, the windings of the storage roll lie (theoretically) point-wise on the circular-cylindrical rigid bars. The existing between adjacent bars and the hub portion of the drum body spaces effectively prevent the occurrence of a lint deposit which impairs the function of the thread delivery device. On the other hand, such a storage drum designed as a solid rod cage is relatively heavy, ie it has a considerable inert mass. This is of less importance as long as the storage drum - as a rule, together with the storage drums of further thread delivery devices, for example a circular knitting machine - is driven by an endless belt, which in turn is coupled to a drive source. This belt drive can in principle not be suddenly stopped or started, so that a start-stop operation of the storage drum is only possible in such a way that one of the storage drum's own positive clutch is disengaged or engaged. Because of its inert mass, the storage drum cannot come to a standstill even when such a clutch is disengaged. However, this would be desirable, for example, in the case of circular knitting machines working with striping apparatus and a number of other uses. In addition, the construction of such a thread delivery device is still relatively complex.

Basically, the same applies to other similar thread delivery devices (DE-OS 23 08 203, DE-PS 16 35 899), in which the elongated thread support elements are formed by rod-like or tooth-like parts of the correspondingly slotted jacket of the pot-shaped drum body itself.

Since the thread support elements of the storage drums of these thread delivery devices as straight rods, teeth or the like. trained, own feed devices are do ^e s required to advance axially by the continuously forming storage winding on the storage drum, so that the thread turns of the storage winding always remain held in the predetermined yarn contact area.

For this purpose, it is known to provide on the storage drum between the individual _i parallel parallel rods forming the thread support elements, radially protruding finger or bow-shaped feed elements which, under the control of a curve, execute a limited axial back and forth movement and thereby advance the storage roll on the thread support elements. In a known device of this type (DE-OS 27 23 210), the feed elements are formed by spring-elastic wire pieces which are anchored on one side of the drum body and protrude radially outward at one end on a hub of the drum body and on the other hand engage in a groove-like cam track which engages on one the circumferential storage drum is formed at a distance from the surrounding ring. In another device of this type (DE-OS 31 04 516) with a triangularly bent part between the rods forming the thread support elements, radially projecting dividing elements for the storage roll are designed more in the manner of wire brackets, each of which is attached at one end to a thread feed element which is cam-controlled is axially movable up and down on two adjacent thread support elements.

The object of the invention is therefore to provide a thread delivery device, the storage drum is characterized by a particularly simple, reliable construction and characterized in that the inert mass the storage drum can be reduced to a minimum value which, for example when driving by means of a stepping motor with low motor output, enables exact start-stop operation, automatic winding of the windings of the storage winding being ensured.

To achieve this object, the thread storage and delivery device mentioned at the outset is characterized according to the invention in that the thread support elements are formed by essentially L-shaped or U-shaped narrow, low-mass brackets which are guided or attached to the drum body or a part connected to it at the other end , and that each hanger on the thread feed side is assigned a region which tapers radially inwards towards the thread outlet side and which is followed by a thread rest area on the hanger.

In contrast to straight solid bars, ribs and the like. these brackets can be made with very little mass and without great manufacturing effort in practically any appropriate shape, so that together with a light drum body, preferably made of plastic material, a very simple construction of the storage drum can be achieved with an extremely small inert mass. At the same time, the stirrups, which are spaced apart in the circumferential direction, ensure a perfect slip-free coupling between the thread turns of the storage roll and the storage drum, while, on the other hand, impairment by lint deposition or the like. is largely excluded.

The brackets, which are preferably arranged at least with their thread support areas at a radial distance from the drum body, are in a preferred embodiment resilient at least in places and radial at the other end with respect to the drum body limited movement. It should be noted that it is known per se (DE-OS 24 36 936) to move the thread support elements designed as resiliently held sheet metal lamellae to a limited extent radially with respect to the drum body.

The situation is very simple if the essentially L-shaped or U-shaped stirrups each have an optionally elastic first stirrup leg in addition to the outwardly concavely curved or straight thread support region, with which they are fastened to the drum body. This first stirrup leg can still be guided laterally in the vicinity of the fastening point on the drum body, in order to prevent lateral deflection of the stirrups under the effect of the thread running up on the thread feed side, in particular if the latter is under a higher tension. To fasten the stirrups to the drum body, the first stirrup legs can be embedded in the material of the drum body or inserted in some other way. It has proven to be expedient if, for each stirrup, the first stirrup leg is inserted into the drum body with a bent fastening part and is held by latching means.

In order to ensure that even when using a very thin and therefore low-mass material for the stirrups, these retain their orientation with respect to the drum axis under all operating conditions, it is expedient if the stirrups on the side of the thread support region opposite the first stirrup leg have a substantially radial position with respect to Have drum body extending second bracket leg, which is designed as a guide element with corresponding guide means of the drum body or a part connected to it. The bracket can be guided laterally and / or radially with their second bracket legs, what can advantageously be done in such a way that the drum body has slots in which the second bracket legs are guided. Such slots can advantageously be arranged at least in the region of an end wall of the essentially cup-shaped circular cylindrical drum body.

To increase the stability, the stirrups with their second stirrup legs can be supported in the drum axis direction under pretension on a support surface arranged in the region of the bottom of the drum body.

It is very expedient if the stirrups are supported radially outwards with respect to the drum body on the side of the thread support area facing away from the first stirrup legs. This ensures that the stirrups with their thread support areas can be elastically pressed slightly inwards by the thread turns applied in order to adapt themselves automatically to the tension conditions of the thread turns. On the other hand, however, the brackets are prevented from spreading radially outwards under the influence of centrifugal force when the thread windings are applied with only very low tension and thus impair the storage roll. The brackets can advantageously be elastically biased radially outwards against their support, so that they oppose their evasive movement to be carried out radially inwards against a defined predetermined resistance.

In an expedient practical embodiment, the drum body can have or carry a disk-shaped or star-shaped support part for the brackets, on which support or optionally guide surfaces for the brackets are formed.

This circular disk-shaped support part can also be formed in a bead-like manner on its outer circumferential surface, in order to enable the thread to be pulled off perfectly overhead, if this is necessary for the respective intended use of the thread delivery or storage device. Since the support part is generally made of relatively soft plastic material, it is advantageous if the support part carries on its outer circumferential surface a thread drain ring made of wear-resistant material, for example spring steel, which reliably prevents the thread from being sawn in. In the case of a multi-part design of the support part, the thread outlet ring can simultaneously hold the thread support part together.

In another embodiment, the arrangement can also be such that the brackets have bent holding parts on their second bracket legs, with which they can be supported on the supporting part.

The free ends of the second stirrup legs are advantageously covered by a cover element placed on or arranged on the drum body base, which prevents that, if the tension of the running thread decreases, thread loops possibly forming on the thread removal side become caught on the ends of the stirrup legs.

The region tapering radially inwards on the thread feed side can be formed directly on each bracket. However, the arrangement can also be such that the tapering region on the thread feed side is formed on at least a part of the drum body or a part connected to it, which projects radially outward beyond the brackets. The tapered areas are on an imaginary circular cone. These inwardly tapering areas produce an automatic feed of the thread windings of the storage reel that are constantly forming during operation on the thread feed side, without the need for separate feed devices. The axial advance of the storage reel can, for example, in the event of missing thread removal from the storage drum, ie in the event of malfunctions, be occasionally hindered, with the result that additional thread windings build up on the thread feed side. In order to prevent thread from entering the narrow gap between the holder and the adjacent end wall or storage drum and looping there around the axis carrying the storage drum, at least one thread deflector can be assigned to the storage drum on the thread supply side, which reaches up to the imaginary circular cone, on which the tapered areas of the bracket lie. It has proven to be very effective if the thread deflector has an essentially convex deflection edge or surface arranged on the side of the storage drum.

The brackets of the new storage drum are relatively easy to manufacture parts, which, as already mentioned, can be given any shape without great effort. So it is e.g. readily possible that each bracket has at least two thread support areas separated from each other by a radially projecting bead-like separation area. Each bracket can also carry a radially outwardly widening area on the thread run-off area on the yarn outlet side, the widening areas of all brackets in turn lying on an imaginary rotating body.

The thin-walled, preferably essentially pot-shaped drum body generally consists of plastic material. It can have slot-like openings in the areas between the brackets in order to further reduce the material expenditure and the inert mass of the storage drum. At the same time, these slit-like openings can also be used to ventilate the overlying turns of the storage roll radially outward, so that fluff or the like is blown off. For similar reasons, the brackets can also carry parts acting as fan blades.

In a preferred embodiment, the stirrups are made of a thin spring wire material, i.e. they are designed in the form of hardened, rust-free shaped wires, which generally do not require any additional surface treatment or coating, although these measures can naturally be provided in individual cases. The stirrups can also be hardened only in limited areas of their longitudinal extent, where an elastic bend or special surface properties are important.

In another embodiment, the brackets, which are designed as flat shaped parts, for example punched out, can be formed in the thread support area as fan blades.

A storage drum in which the brackets lie in the radial planes containing the drum axis is equally suitable for clockwise and counter-clockwise rotation. In particular if it can be assumed that the storage drum is only operated in one direction of rotation, it is also conceivable for the brackets to lie in planes which are tangential to a rotational body coaxial with the drum axis, for example a circular cylinder or a circular cone.

Further advantageous refinements are the subject of dependent claims.

The thread delivery and storage device described can in principle be used for all thread-consuming machines and purposes in which an even thread delivery is important. Your storage drum can be driven in the usual way in circular knitting machines by means of a corresponding pulley from an endless drive belt, but it is particularly suitable for individual drive by means of a small electric motor, since, as explained at the beginning, it can be carried out with an extremely small inertial mass. In this way it is possible to create a "self-sufficient" thread delivery and storage device which delivers the thread under exactly adhered to predetermined conditions, without the need for external monitoring by its own monitoring devices or the like.

• Fig. 1 eine autarke Fadenliefer- und -speichervorrichtung gemäß der Erfindung, in einer Draufsicht,
• Fig. 2 die Fadenliefer- und -speichervorrichtung nach Fig. 1, geschnitten längs der Linie II-II der Fig. 1 in einer Seitenansicht,
• Fig. 3 die Speichertrommel der Fadenliefer- und -speichervorrichtung nach Fig. 2 in einer abgewandelten Ausführungsform im axialen Schnitt in einer Seitenansicht und in einem anderen Maßstab,
• Fig. 4 die Speichertrommel der Fadenliefer- und -speichervorrichtung nach Fig. 2 in einer zweiten abgewandelten Ausführungsform in einer Darstellung entsprechend Fig. 3,
• Fig. 5 die Fadenliefer- und -speichervorrichtung nach Fig. 1 mit zugeordnetem Fadenabweiser in einer Draufsicht und in einem anderen Maßstab,
• Fig. 6 die Speichertrommel der Fadenliefer- und -speichervorrichtung nach Fig. 5, geschnitten längs der Linie VI-VI der Fig. 5 in einer Seitenansicht, unter teilweiser Veranschaulichung des Fadenabweisers in einem anderen Maßstab,
• Fig. 7 eine Fadenliefer- und -speichervorrichtung gemäß der Erfindung in einer weiteren Ausführungsform in einer Seitenansicht mit teilweise geschnittener Speichertrommel
• Fig. 8 die Speichertrommel der Fadenliefer- und -speichervorrichtung nach Fig. 2 in einer dritten abgewandelten Ausführungsform, im axialen Schnitt, in einer Seitenansicht und in einer Teildarstellung,
• Fig. 9 die Speichertrommel nach Fig. 8, geschnitten längs der Linie IX-IX der Fig. 8 in einer Draufsicht und in einer Teildarstellung, im Bereiche des Stützringes,
• Fig.10 den Trommelkörper der Speichertrommel nach Fig. 8, im axialen Schnitt, in einer Seitenansicht und in einer Teildarstellung,
• Fig.11 die Speichertrommel der Fadenliefer- und -speibis ¹⁸ _chervorri_cht_ung nach _Fig. 2 in weiteren abgewandelten Ausführungsformen, jeweils im axialen Schnitt, in einer Seitenansicht und in einer Teildarstellung,
• Fig.19 die Speichertrommel nach Fig. 18 in einer Draufsicht auf ihre Unterseite in der Richtung des Pfeiles IXX der Fig. 18,
• Fig.20 die Speichertrommel nach Fig. 18 in einer Seitenansicht im Ausschnitt und teilweise aufgeschnitten und
• Fig.21 die Speichertrommel der Fadenliefer- und -speichervorrichtung nach Fig. 2 in einer weiteren abgewandelten Ausführungsform im axialen Schnitt, in einer Seitenansicht und in einer Teildarstellung.

Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:

• 1 is a self-sufficient thread delivery and storage device according to the invention, in a plan view,
• 2 shows the thread delivery and storage device according to FIG. 1, cut along the line II-II of FIG. 1 in a side view,
• 3 shows the storage drum of the thread delivery and storage device according to FIG. 2 in a modified embodiment in axial section in a side view and on a different scale,
• 4 shows the storage drum of the thread delivery and storage device according to FIG. 2 in a second modified embodiment in a representation corresponding to FIG. 3,
• 5 shows the thread delivery and storage device according to FIG. 1 with an associated thread deflector in a plan view and on a different scale,
• 6 shows the storage drum of the yarn delivery and storage device according to FIG. 5, cut along the line VI-VI of FIG. 5 in a side view, with a partial illustration of the yarn deflector on a different scale,
• Fig. 7 shows a thread delivery and storage device according to the invention in a further embodiment in a side view with a partially cut storage drum
• 8 shows the storage drum of the thread delivery and storage device according to FIG. 2 in a third modified embodiment, in axial section, in a side view and in a partial representation,
• 9, the storage drum of FIG. 8, cut along the line IX-IX of FIG. 8 in a plan view and in a partial view, in the region of the support ring,
• 10 shows the drum body of the storage drum according to FIG. 8, in axial section, in a side view and in a partial representation,
• 11 shows the storage drum of the Fadenliefer- and -speibis ¹⁸ _chervorr i _ch t _un g to _F ig. 2 in further modified embodiments, each in axial section, in a side view and in a partial representation,
• 19 shows the storage drum according to FIG. 18 in a plan view of its underside in the direction of arrow IXX of FIG. 18,
• 20 shows the storage drum according to FIG. 18 in a side view in a cutout and partially cut open and
• 21 shows the storage drum of the thread delivery and storage device according to FIG. 2 in a further modified embodiment in axial section, in a side view and in a partial view.

The thread delivery and storage device shown in FIGS. 1, 2 has a holder 1 in the form of a rectangular, flat housing limited on the parallel side, which can be fastened, for example on a circular knitting machine, by means of fastening devices (not shown). In the flat bottom wall 2 of the holder 1, a circular cylindrical recess 3 is formed on the outside, into which a storage drum 4 projects, which is arranged coaxially to the recess 3. The storage drum 4 has an essentially pot-shaped drum body 5, which is made of plastic material and which is placed on the shaft 7 of an electric motor, in particular a stepping motor 8, by means of a hub 6, which in turn projects through an opening 9 in the base wall 2 outwards via a fastening element 10 is rigidly connected to the holder 1. The drum body 5 carries a number at equal radial distances from the drum axis 11 and in the circumferential direction evenly distributed stirrups 12 which are bent from a thin spring wire with a smooth surface. The spring wire can have a circular cross section or a profile wire with, for example, an angular cross-sectional shape. It can have the same suspension properties over the entire length of the temple; However, embodiments are also conceivable in which each bracket 12 is only partially elastic by appropriate local hardening.

Each of the resilient brackets 12 is bent substantially in a U-shape; it has a substantially straight thread support area 13 parallel to the drum axis 11 and then on the thread feed side, i.e. 2 at the top, a radially inwardly tapering region 14 which merges via an arc 15 into a first stirrup leg 16 which runs essentially radially with respect to the drum axis 11 and is at least approximately horizontal. On the side of the thread support area 13 opposite the first stirrup leg 16, each stirrup also carries a second stirrup leg 17, which also runs essentially radially to the drum axis 11. The first and second stirrup legs 16 and 17 of all stirrups 12 lie on the drum axis 11 coaxial imaginary circular cones, while the thread support areas 13 of the bracket 12 are on an imaginary, also coaxial circular cylinder.

Subsequent to their first stirrup legs 16, the stirrups 12 each carry fastening parts 180 which are angled at right angles, with which they are embedded in the jacket 19 of the pot-shaped drum body 5 which is correspondingly widened in this area, so that at the same time a lateral guidance of the first stirrup legs 16 in the vicinity of the fastening point is guaranteed.

With their second stirrup legs 17, the stirrups 12 lie in slots 18 which extend radially to the drum axis 11 and which are formed in the bottom 20 of the drum body 5 and whose width is somewhat larger than the width of the stirrups 12. The brackets 12 have thus been in the slots 18 via their second bracket legs 17 Lich led; they are also supported with their second stirrup legs 17 under axial pretension on a support surface 21 formed on the bottom wall 20 of the drum body 5. Thus, each of the brackets 12 is rigidly attached to the drum body 5 in the area of its first bracket leg 16, ie on the thread feed side, while at its other end, ie in the area of the second bracket leg 17, it is guided in a radially limited manner on the drum body 5, while the walls of the slots 18 cause lateral guidance of the brackets 12 in this last-mentioned area.

The drum body 5 is formed in the region of its bottom wall 20 with an approximately frustoconical cover part 22, into which the slots 18 extend and which prevents thread from getting caught on the ends of the second bracket legs 17.

A thread inlet eyelet 23 and a thread outlet eyelet 24 are each fixedly arranged on the holder 1 laterally next to the storage drum 4. In addition, the holder 1 carries a thread brake 25 to be explained in detail and a thread inlet eye 26 arranged upstream thereof.

The thread 27 drawn off from a supply spool (not shown further) runs tangentially through the inlet eye 26 via the thread brake 25 and the inlet eye 23 onto the inwardly tapering regions 14 of the brackets 12 of the storage drum 4 driven by the electric motor 8. The resulting thread turns are due to the inclination of the bracket areas 14, with reference to FIG. 2 axially downward, pushed onto the essentially straight thread support region .13, where they form a storage roll, indicated at 28, consisting of several thread turns. The thread 27 is then drawn off from the storage roll 28 and fed via the outlet eyelet 24 to a thread consumer (not shown):

Under the action of the tension exerted by the thread windings, the storage roll 28, the stirrups 12 can pivot elastically somewhat inward about their arc pieces 15, the somewhat oblique, pretensioned second stirrup legs 17 sliding somewhat inwards on the support surface 21. As a result, the straight thread support areas 13 of the stirrups 12 are slightly inclined so that they come to lie on a common conical jacket which is coaxial with the drum axis 11 and which favors the axial advance of the storage roll 28.

The elastic resistance which the brackets 12 oppose to this inward pivoting movement of their thread support area 13 depends not only on the elastic properties of the brackets 12 in the area of their "articulation point" for the respective bow 15, but also on the pretension with which the second bracket legs 17 are supported on the support surface 21. By appropriate dimensioning of these sizes, if necessary, special properties of the thread material to be wound can be taken into account. Cases are also conceivable in which the brackets 12 are rigidly connected to the drum body 5, so that they are not capable of an elastic evasive movement.

In the jacket 19 and in the bottom wall 20 of the pot-shaped drum body 5, slit-like openings 29 are formed, each lying between adjacent brackets 12, which on the one hand further reduce the already small mass of the storage drum 4 by saving material and on the other hand with the rotating storage drum 4 as Fans act through which the electric motor 8 is cooled and the thread windings of the storage roll 28 are ventilated radially outward and blown off.

In the modified embodiments of the storage drum 4 shown in FIGS. 3 to 7, the same parts as in the storage drum according to FIGS. 1, 2 are provided with the same reference numerals, so that a further explanation is not necessary.

In the embodiment according to FIG. 3, the U-shaped wire brackets 12 are inserted with their fastening parts 180 into corresponding axially parallel bores of the drum shell 19. Your first stirrup legs 16 are laterally guided in approximately radially extending groove-like depressions 30 of the end face of the drum body shell 19. A stationary ring is used for the stationary locking, which is pushed into the drum body 5 with a flange 32 and is locked against the drum body jacket 19 at 33 by means of a circumferential bead and an associated depression.

With their second, approximately horizontal legs 17 raaen the bracket 12 into the slots 18, the lateral guidance of the bracket 12 be in the region of the bottom wall 20 Act.

On the first bail legs 16. ¹ opposite side of the thread support portion 13, the brackets are supported relative to 12 of the drum body 5 radially outward. For this purpose, a coaxial support disk 34 made of plastic material is placed on the bottom wall 20 of the drum body 5, which supports an annular flange formed as a bead 35 on the outer circumferential surface, which has an essentially circular cylindrical support surface 36 on its inside, against which the brackets 12 Support at the lower end of their thread support area 13. The brackets 12 are preloaded too elastically radially outwards and therefore bear against the support surface 36 under pretension. By correspondingly dimensioning this pretension, the elastic resistance can again be determined, which the brackets oppose with the already explained slight inward pivoting of their thread support areas 13.

On the bead 35 of the support disk 34, a thread drain ring 37 made of spring steel is inserted, the surface of which can also be coated and which holds the support disk 34 together in the case of a multiple design.

The described storage drum 4 according to FIG. 3 is suitable for the overhead withdrawal of the thread from the storage roll 28. The running thread runs over the thread run-off ring 37, which is made of wear-resistant material and thus ensures perfect thread run-off.

In the further embodiment of the storage drum 4 shown in FIG. 4, the brackets 12 consist of essentially U-shaped flat sheet metal stampings, which, however, can also be made of plastic material, for example. For each bracket 12, the bracket part 38 corresponding to the thread support area 13 with its outer narrow end face is designed as a fan wing, on which on one side the narrow arm-like area 14, which tapers inward and has the narrow, arm-like first bracket leg 16 and on on the other side, the second arm leg 17, which is again narrow like an arm, is connected. While the stirrup part 38 is essentially rigid, at least in the region of the arch at 15 or in the vicinity of the clamping point of the first stirrup leg 16 there is an elasticity which allows the stirrup 12 to be preloaded radially outward, so that it is under elastic prestress bears against the support surface 36 of the support disk 34 and, owing to the forces emanating from the thread windings of the storage roll 28, can be pivoted radially inward about a hinge point in the vicinity of the arch 15.

In this case, the first stirrup legs 16 of the stirrups 12 are in turn inserted into corresponding groove-like depressions 30 in the end wall of the drum body casing 19. They are held captively by welding the plastic material in the region of the trough-shaped depressions 30.

The air flow conveyed by the bracket parts 38, which act as fan blades, passes through openings 39 in the support disk 34, which at the same time forms the bottom wall of the drum body 5, into the drum body 5 and radially outwards between the brackets 12, the thread windings of the storage roll 28 being blown through . Since the drum body jacket 19 extends in this case, starting from the hub part 6, only in the area above the bracket parts 38, there are no parts preventing the passage of air between the bracket parts 38.

Irrespective of whether they are bent from wire, as in the embodiments according to FIGS. 2, 3, or formed as stamped parts, as in the embodiment according to FIG. 4, the brackets 12 can be brought into any shape without increasing the manufacturing outlay. For example, in the manner shown in FIG. 6, it is possible to subdivide the straight thread support area 13 for each stirrup into two thread support areas 13a, 13b by a bulge-like protruding separation area 40 or for each stirrup 12 in the manner shown in FIG. 7 on the Thread outlet side adjoining the thread support area 13 to provide a radially outwardly widening area 41. The outwardly widening regions 41 of all the brackets 12 are in turn located on a common imaginary circular cone or another purpose-oriented rotating body. They prevent - if this is necessary in consideration of the processed thread or the employment relationships - that the lower turns of the storage roll 28 fall down from the storage drum 4.

The drum body 5 of the storage drum 4 illustrated in FIGS. 5, 6 is configured similarly to that in FIG. 4. Since the brackets 12 are bent from wire in this case, separate fan blades 42 are provided for ventilating the thread windings of the storage roll 28, which are formed in the annular space enclosed by the bracket portions 13 and formed approximately radially on the drum body shell 19 projecting from the hub part 6 in the manner of an annular flange are.

If the thread consumer does not remove any thread from the storage reel 28 in the event of a malfunction or if the axial feed of the thread reel 28 is hindered for other reasons, it can happen that, with the storage drum 4 continuing to run, windings build up on the inwardly tapering regions 14 of the brackets 12, which eventually If the thread delivery device is not switched off in time, enter the space between the bottom wall 2 of the holder 1 and the adjacent end face of the drum body 5 and loop there around the shaft 7.

To prevent this, a thread deflector 43 is arranged on the underside of the holder 1 next to the storage drum 4 in the embodiment according to FIGS. 5, 6, which in the manner shown in FIG. 6 in particular with a convex thread deflection edge 44 in the region of the protrudes from the imaginary circular cone described inwardly tapering bracket regions 14. The thread deflector 43 has an inclined surface 45, which runs from the thread deflection edge 44 approximately parallel to the bracket regions 14, which runs at a short distance from the bracket regions 14 and along the thread deflector edge 44 cuts a gently curved deflecting surface 46, so that the wedge-shaped cross-sectional shape shown in FIG. 6 results.

If thread windings build up on the temple areas 14, these are passed over the thread-deflecting edge 44 onto the thread-deflecting surface 46 and are thus prevented from rising further along the temple areas 14.

• Die die Speichertrommel 4 tragende Welle 7 ist in dem Halter 1 drehbar gelagert; sie trägt auf der Halteroberseite eine drehfest aufgesetzte Riemenscheibe 47.

The thread delivery device illustrated in FIGS. 1, 2 has its own electric electric motor 8 for driving the storage drum 4. However, it is also fundamentally possible to set the storage drum 4 in rotation in the conventional manner by means of a drive belt, as is used in circular knitting machines for driving all yarn delivery devices arranged along the machine circumference. An example of such a thread delivery device is illustrated in FIG. 7:

• The shaft 7 carrying the storage drum 4 is rotatably supported in the holder 1; it carries a non-rotatable pulley 47 on the upper side of the holder.

In this case, the storage drum 4 is combined with a conventional plate thread brake 25a. A thread inlet and a thread outlet sensor are illustrated together with a loop deflection bar at 49, 50 and 51, respectively.

In this case, the storage drum 4 corresponds in its basic structure to the embodiment according to FIGS. 1, 2. Apart from the outwardly projecting lower bracket regions 41, the brackets 12 are, however. deviating from the embodiment according to FIGS. 1, 2, additionally supported radially outwards. For this purpose, the brackets 12 are each provided on their second bracket legs 17 with a hook-like bent holding part 52 which engages behind a corresponding circular-cylindrical holding surface 53 of a cover part 22a placed on the drum body base 20.

Of course, the other previously described embodiments of the storage drum 4 can also be used. The brackets 12 can lie in the radial planes containing the drum axis 11 or - if a storage drum drive is only possible in one direction of rotation - the arrangement can be such that the planes containing the brackets 12 are tangent to a circular cylinder or coaxial with the drum axis 11 - cone run.

1, 2, as already noted, is self-sufficient, ie independent of an external drive source. Since the electric motor 8 only has to be designed for a relatively low nominal power, the associated electrical circuit can easily be accommodated in the housing-like holder 1. However, this makes it possible to process additional information in this circuit arrangement, by means of which the thread delivery device becomes an autonomous thread delivery device which is not only able to deliver thread continuously or in exact start-stop operation, but also during the thread delivery automatically maintain a predetermined tension for the supplied thread and ensure that that of the supply spool coming thread is wound with constant tension on the storage drum, so that there is a perfect structure and feed of the storage reel 28.

The electric thread brake 25 has a direct current motor 70 which is inserted into a corresponding bore of the holder 1 and which carries a second storage drum 4a, which is basically constructed similarly to the storage drum 4 already described with reference to several exemplary embodiments. It only has a smaller diameter. Its bracket 12 and its drum body 5 are only indicated schematically in FIGS. 1, 2.

The thread 27 running in via the inlet eye 26 is looped around the second storage drum 4a in several turns, so that it is coupled with it without slippage. The associated electric motor 70, which acts as a brake motor, strives to drive the second storage drum 4a in the opposite direction of rotation as the storage drum 4; but it is designed with its torque much weaker than the stepper motor 8, so that it is driven by the thread 27 against its direction of rotation when the stepper motor 8 is running. In doing so, it develops a braking torque which acts on the thread 27 via the second storage drum 4a and which ensures that the thread 27 always runs onto the storage drum 4 with a predetermined thread tension.

The size of this braking torque of the electric motor 70 can be regulated by correspondingly influencing one of the electrical input variables (current, voltage) of the electric motor.

The circuit parts of the associated control circuit are designed in the form of printed circuits, the associated circuit boards 86, 87 of which are accommodated together with the housing 600 of a signal transmitter in the holder 1, the interior of which is closed by a cover 88 (see FIG. 2).

The running of the storage drum 4 yarn is scanned by a spring-loaded sensor 55 which rotates a shaft 56 corresponding to that ssignal write over the rotation angle sensor 600 ^q Fadenspannun, which is fed to the control circuit and the electric motor 8 controls to a constant yarn tension.

In the storage drums 4 described, the brackets 12 are each essentially U-shaped. Embodiments are also conceivable in which these brackets 12 are essentially L-shaped, ie the second bracket legs 17 are omitted. The strap can then, for example. Only in corresponding slots 86 _{0 (FIG. 6)} of the support plate 34 or the bottom wall 20 of the drum body to be guided laterally and radially 5, as will be explained.

It is essential in any case that a slip-free coupling between the thread turns of the storage winder 28 and the thread support areas 13 of the stirrups 12, which are at a radial distance from the adjacent parts of the drum body 5, is ensured.

In the embodiments of the storage drum 4, 4 a shown in the drawing, the brackets 12 lie in the planes containing the drum axis 11. This means that the storage drums can be used equally well in both directions of rotation. Basically, could for Certain applications, however, also bring an embodiment advantages in which the brackets 12 are somewhat “oblique” with respect to the drum axis 11, that is to say in planes which intersect the drum axis 11 at a small acute angle. This angle could be approximately between 3 ° and 5 °, although other angle values are also conceivable. Similarly, the stirrups with their thread support area 13 could also be designed following a spiral. Such an inclined position of the stirrups 12 can, for example, prevent the storage roll 28 from falling downward.

In these cases, however, the brackets 12 are also held on the drum body 5 essentially in the direction of the drum axis.

If, as explained earlier, the stirrups 12 consist of a resilient material, for example spring wire, and are only rigidly attached to their first stirrup legs 16, that is to say on one side on the drum body 5, they will, as practical experience has shown, in Operation of the incoming or outgoing thread slightly vibrated. This is due to the fact that the brackets with their thread support areas 13 are distributed around the circumference of the storage drum 4 or 4a, so that the thread is not seen exactly on a smooth cylindrical surface, but on the corner edges formed by the thread support areas 13 of a polygonal circumferential Body rests. This dynamic behavior of the bracket 12 is suitable for significantly facilitating and favoring the axial advance of the storage roll 28.

8 to 21 further modified exemplary embodiments of storage drums 4 are illustrated.

8, 9, the drum body 5 is placed on a two-part hub 6a, 6b, the lower hub part 6b of which has an integrally formed, radially outwardly projecting annular flange 60, while a cover-like annular disk 61 is placed on the upper hub part 6a . The ring flange 60 and the ring disk 61 overlap the second and first legs 17 and 16 of the U-shaped wire bracket 12 in the region of their fastening or guide points on the drum body 5 in the manner shown in FIG. 8. On the resilient brackets 12, a radially inwardly tapering area 14 is in turn formed, which merges into the first bracket leg 16 via an arc 15. On the other side of the straight thread support area 13, each bracket 12 is formed with a bulge-shaped curved bracket area 41 which is adjoined by the second bracket leg 17. Both stirrup legs 16, 17 each have at their ends an approximately right-angled fastening part 180, the arrangement being such that the two fastening parts 180 of a stirrup 12 are aligned coaxially with one another The two fastening parts 180 of a bracket 12 are each formed in the form of coaxial bores 181, 182 and mutually coaxial recesses. of the drum body 5 and held therein by the overlapping ring flange 60 or the ring disk 61. While the cylindrical recess 181 corresponds exactly to the diameter of the associated fastening part 180 so that it is held in a fixed position, the other recess 182 is formed with a larger diameter, with the result that the lower fastening part 180 and thus also the second leg 17 of each bracket is guided radially and laterally movable. The brackets 12 are supported on their legs 16, 17 in the drum axis direction on support surfaces 62, 63 of the drum body 5; they are under such a prestress that their two legs 16, 17 rest on the bearing surfaces 62, 63 with spring force. In addition, in the area of the upper end of the thread support area 13, ie at the transition to the area 14, a radial support 64 of small axial length is provided with respect to the drum body 5.

The brackets 12 can be easily attached with their fastening part 180 in the recesses 181, 182 during assembly.

Within the arc 15 and the bulged region 41 of the bracket 12 is an endless, coaxial to the drum axis thread deflection ring 65 or 66 is arranged, which may for example consist of a plastic material and whose task is to prevent threads between the individual wire bracket 12 can get and get caught there, which could lead to thread breaks. In addition, the two deflection rings 65, 66 - or at least one of them - can also perform a support and stabilization function for the stirrups 12 if this should be necessary in individual cases.

As can be seen from FIG. 9, the lower deflection ring 66 is formed in the region of the stirrups 12 with radial slots 67 which are open towards the outside and into which the individual stirrups 12 partially engage with their regions 41. The width of the slots 67 corresponds to the diameter of the bracket 12 made of cylindrical spring wire material; the depth of the slots 67 is approximately equal to half the wire thickness of a bracket 12, which means that the bracket 12 is embedded in such a slot 67 to approximately half its diameter.

The upper deflection ring 65 can be designed in a corresponding manner; the arrangement can also be made such that this deflection ring 65 is rigidly connected to the brackets 12, which are embedded in it, for example.

Since the brackets 12 made of elastic wire material with their lower fastening parts 180 are radially limitedly movable in the recesses 182 and this mobility is also not impaired by the length of the slots 67 in the lower deflection ring 66 - in order to prevent such impairment of the mobility is between the Ring flange 60 and the second stirrup legs 17 at 68 each have an air gap of a few tenths of a millimeter - the stirrups 12 can taper conically with their straight thread support area 13, viewed from top to bottom, if the radial force exerted by the thread winding on the thread support area 13 is greater is called the pretension of the bracket. This taper is limited in that the lower fastening part 180 comes to rest on the inner edge of the recess 182. In such a deformed state, the straight thread support areas 13 of all brackets 12 lie on the surface of an imaginary circular cone, the tip of which lies on the thread outlet side on the drum axis.

Since the stirrups 12 are each supported radially at 64, the explained inward pivoting movement of the lower parts of the stirrups 12 remains essentially limited to their thread support regions 13 and the subsequent bead-like regions 41. The radial support points at 64 can lie not only on reinforcing ribs, as shown in FIG. 8, but also in each case on a fan blade integrally formed on the drum body 5, which is denoted by 69 in FIG. 8 and is delimited with respect to the drum body 5 .

In the unloaded basic position of the stirrups 12 shown in FIG. 8, their straight thread support areas 13 will generally lie on a circular cylinder. With a full storage wrap and especially with poorly transportable yarn, as already explained, such an elastic deformation of the stirrups 12 - against their pretension - can occur that the yarn is transported axially from an initially larger winding circle diameter to a smaller winding circle diameter, thus easing the tension slightly Storage winding comes about and the thread transport is facilitated.

Basically the same results can also be achieved in that the brackets 12 are designed without their own elastic pretension, while the lower deflection ring 66 consists of a flexible material and is firmly connected to the brackets 12. The elastic deformation of the deflection ring 66 thus produces a corresponding radial suspension of the brackets 12.

However, it is also conceivable that the stirrups 12 lie in their unloaded basic position with their thread support area 13 on a circular cone, the tip of which lies on the thread feed side on the drum axis. This means that the winding diameter is slightly from the thread inlet side to the thread outlet side increases. Such an arrangement can be advantageous, for example, if smooth and inelastic yarns are to be processed which by nature have little hold on the thread support areas 13 of the stirrups 12, so that the turns tend to fall off. Due to the aforementioned continuous increase in the winding diameter over the length of the thread support areas of the stirrups 12, a certain compensation takes place - within the elastic limits of the thread material.

In this embodiment, the arrangement can advantageously be such that when the fastening part 180 is in contact with the radially inner wall of the recess 182, the thread support area 13 of each bracket 12 lies on a circular cylinder coaxial with the drum axis.

The bead-like outwardly curved regions 41 of the stirrups 12 form, together with the lower deflection ring 66, a thread rewinding board, as is present, for example, in the embodiment according to FIG. 3 in the form of the thread outlet ring 37 and also has the task of keeping loose thread windings falling down . This thread rewinding board, as practical experience has shown, simultaneously exerts a certain entraining function on the thread, as a result of which excess thread experiences a kind of forced entrainment without, however, being dragged along by force. The outside diameter of the imaginary bead-like rotating body described by the regions 41 of the brackets 12 should expediently be in a certain ratio to the outside diameter of the lower deflection ring 66. The best results were achieved if, as already explained, the brackets 12 in the bead region 41 are embedded in the slots 67 of the deflection ring 66 up to about half the wire thickness. This also ensures at the same time that when pulling the thread upside down from the storage drum by hand (for example in the case of thread excess) the storage drum) the thread can be pulled off without plucking or thread breakage.

As a result of the open construction of the storage drum given by the spaced apart brackets 12 and the deflection ring 65, 66, free air passage along the storage roll arranged on the thread support areas 13 of the brackets 12 is possible. The rib-like projections on the drum body 5 designed as fan blades 69 then serve in addition to their reinforcing function for the drum body 5 for air delivery.

The drum body 5 in the embodiment according to FIG. 8 is illustrated again in FIG. 10 without a bracket 12. From this figure it can be seen that in the region of the upper bearing surface 62 the first bracket legs 16 of the bracket 12 are each associated with lateral guide ribs 70 which lead to the associated recess 181 and result in lateral guidance of the bracket legs 16. While the diameter of the upper cylindrical recess 181 corresponds approximately to the wire diameter of a bracket 12, the diameter of the associated lower cylindrical recess 182 is approximately 0.15 mm larger than the wire diameter.

The embodiment of Fig. 11 basically corresponds to that of FIGS. 8 to 10 with the difference however, that the strap 12 over the entire length of their first legs 16, their arcs 15 and their inclined portions 14 on the optionally ri ^pp enartig divided part 69 of the drum body 5 are supported.

In addition, the brackets 12 are fastened radially immovably with their fastening parts 180 on both sides in cylindrical recesses 181, 182, which means that the two cylindrical recesses 181, 182 of a bracket 12 each have the same diameter, which corresponds to the wire diameter. The ring flange 60 lies there directly on the second stirrup legs 17. The also available Abweisrina 65 is not shown.

The drum body 5 extends in its area 69 shown in cross section in FIG. 11 as a solid body around the entire circumference, so that no thread can enter between adjacent brackets 12 in this area.

Finally, the representation according to FIG. 11 can also be seen together with that according to FIG. 8 in such a way that it illustrates a different sectional representation of an embodiment according to FIG. 8, in which a bracket 12 according to FIG. 8 alternately with its lower second leg 17 is guided in a radially limited manner and the next bracket 12 is rigidly supported on the drum body 5 at both ends according to FIG. 11.

The embodiment according to FIG. 12 is also similar to that according to FIGS. 8 to 11, but a simpler design of the bracket 12 is provided. Each bracket 12 is in fact essentially U-shaped only in the section given by its first leg 16, the adjoining arch 15 and the inwardly inclined region 14. The angled fastening part 180 adjoining the first leg 16 is coaxial with the part forming the straight thread support region 13, which adjoins the region 14 and is held in a corresponding recess 182 of the lower ring flange 60. The diameter of the recess 182 can, as illustrated in FIG. 12, be equal to the diameter of the associated bracket 12 consisting of wire, with which the bracket 12 is rigidly held at both ends.

Alternatively, the arrangement can also be such that the recesses 182 either all or alternately every second, as illustrated in FIG. 8, have a larger diameter than the wire diameter of the bracket 12. So that the spring-elastic bracket 12 are guided radially limited movement at their lower ends.

Above the thread support area 13, the brackets 12 each rest on an all-round bead-like part 69 of the drum body 5, which carries an open-edge groove 71 for each bracket 12, in which the associated bracket 12 is guided laterally. The radial mounting of the upper fastening parts 180 of the brackets 12 takes place between the above-mentioned bead-like part 69 and a cylindrical flange 72 formed on the annular disk 61, which overlaps the fastening parts 180 of the brackets 12 in the manner shown in FIG. 12. On the outside of the cylindrical flange 72, a toothing 730 is formed, in which a drive toothed belt, not shown, can engage.

An embodiment with even simpler wire clips 12 is illustrated in FIG. 13. The wire brackets 12 are only bent in an L-shape, with their first leg 16 each resting on the support surface 62 of the drum body 5 running at right angles to the axis of rotation of the drum or, as shown, a molded part 73 connected to it. They are held by the attached washer 61, where necessary, lateral guide ribs for the first stirrup legs 16 can be provided either in the washer 61 or in the area of the support surface 62.

With their legs forming the straight thread support region 13, the brackets 12 penetrate the circumferential bead-like region 69, which, with its cone surface 140, which may be designed to be wear-resistant, forms the region of the storage drum which tapers radially inwards towards the thread outlet side - comparable to region 14 of FIG. 8. The conical surface 140 can also be interrupted by grooves, as is also conceivable to subdivide the entire bead-like region 69 in radial planes by slots, so that it consists of individual, congruent ribs lying next to one another at a distance.

The brackets 12 are in turn held with their end-side fastening parts 180 in cylindrical recesses 182 of the drum body 5, the diameter of the recesses 182 being either equal to or larger than the wire diameter, as has already been explained in detail with reference to the other embodiments.

Above the bead-like area 69, the brackets 12 are exposed with a section 74 which forms a rack gear toothing in which a drive toothed belt (not shown) can engage.

14 to 16 illustrate embodiments in which the thread support area 13 is not straight, but is concavely curved toward the outside of the storage drum. The curvature of the stirrups 12 is uniform over the entire thread support area, which also includes the inwardly tapering area 14 of the embodiment according to FIG. 8. The advantage over known, from the fully worked storage drums, which are basically designed in the manner of an anchor cap are, is that the bracket 12 only have a point contact with the thread turns and the winding body thus forms a kind of "polygon". This minimizes the risk of threads sticking to the storage drum. Since the stirrups 12 are bent in a simple manner from a hard, spring-elastic material, a further wear-reducing surface treatment, as is required with a fully worked storage drum in the area of the thread supply and drainage or the thread contact surface, is generally unnecessary .

Apart from the curved configuration of the thread support area 13, the embodiment according to FIG. 14 corresponds to that according to FIG. 11, so that a further explanation is unnecessary. The brackets 12 are rigidly supported on the drum body 5 at both ends by their fastening parts 180; they are also approximately in the middle of the Fadenaufla ^g ebereiches 13 still radially supported on a molded on the drum body 5 support plate 75, which carries on its outer periphery open edge grooves 76, in which the bracket 12 are laterally guided. The upper washer 61 is widened like a cover so that it covers the first legs 16 of the brackets 12 over the entire length and even largely covers the arch 15 of each of the brackets 12.

In this embodiment as well, the brackets 12 could, in the manner shown in FIG. 8, be guided in the region of their lower fastening parts 180 so as to be radially movable in recesses 182 of larger diameter.

In addition, it would also be conceivable to hold the bracket 12 to the drum body 5 only in the region of its lower second leg 17 and to make it radially limitedly movable in the region of its upper first leg 16, for example by the. Recesses 181 are formed with a larger diameter than the corresponding fastening part 180 and the washer 61 is arranged at a certain distance from the first bracket legs 16.

• Bei der Ausführungsform nach Fig. 15 sind die im wesentlichen L-förmigen Bügel 12,ähnlich wie in Fig. 14, mit ihren zweiten Schenkeln 17 und deren Befestigungsteilen 180 an dem Trommelkörper 5 fest gehaltert, wobei im Bereiche der unteren Auflagefläche 63 auch für jeden Bügelschenkel 17 eine randoffene Nut angeordnet sein kann, die der seitlichen Führung dieses Bügelschenkels dient. Die untere Auflagefläche 63 ist im übrigen an einem scheibenförmigen Formteil 76 des Trommelkörpers 5 ausgebildet, der mit einem wulstartigen Teil 77 über die Bügel 12 radial vorragt und damit den Fadenrückspul-Bord bildet. Das wulstartige Teil 77 kann im Bereiche jedes Bügels 12 mit einem randseitigen Einschnitt 78 versehen sein, so daß sich eine mit dem unteren Abweisring 66 der Fig. 8 vergleichbare Anordnung ergibt.

Embodiments with stirrups 12 which are guided so as to be radially movable at one end are shown in FIGS.

• In the embodiment according to FIG. 15, the substantially L-shaped brackets 12, similarly to FIG. 14, are firmly held on the drum body 5 with their second legs 17 and their fastening parts 180, wherein in the region of the lower bearing surface 63 also for everyone Bow leg 17 can be arranged an edge-open groove, which serves the lateral guidance of this bow leg. The lower support surface 63 is otherwise formed on a disc-shaped part 76 of the drum body 5, which projects radially with a bead-like part 77 over the bracket 12 and thus forms the thread rewind board. The bead-like part 77 can be provided in the region of each bracket 12 with an edge-side incision 78, so that an arrangement comparable to the lower deflection ring 66 of FIG. 8 results.

With its upper fastening part 180, each bracket 12 engages in a corresponding recess 181 of the all-round bead-like part 69 of the drum body 5. The diameter of each recess 181 is larger than the diameter of the associated bracket 12 made of wire.

In the embodiment according to FIG. 16, the stirrups 12 on the thread inlet side are fundamentally held on their first stirrup legs 16 in a manner similar to the embodiment according to FIG. 13, so that a further discussion is unnecessary in this respect. The bead-like region 69 of the drum body 5 projects radially beyond the brackets 12 in the region of its obliquely inwardly inclined peripheral surface 140; it is provided with longitudinal slots 141, in which the brackets 12 are radially movable in their areas 14, but are guided laterally. On their fastening parts 180, the stirrups 12 are received in recesses 182 in the drum body 5, the diameter of which is larger than the diameter of the stirrups 12 made of wire.

17 shows a particularly simple embodiment of a storage drum 4 which is distinguished by a very small, inert mass. The essentially U-shaped wire clips 12 are inserted with the fastening parts 180 of their second legs 17 directly into corresponding recesses 182 of the same diameter of the drum body 5 reduced to the hub 6. At the other end, with their fastening parts 180, they are wrapped around and connected to a thread-deflecting ring 66 consisting of wire and also serving as a support ring. The other thread deflection ring 65 is also designed as a wire ring and is fastened in the same way to the brackets 12 in the region of their second leg 17. If necessary, a bulging area 41 can also be provided on the brackets 12.

Finally, FIGS. 18 to 20 illustrate an embodiment similar to that according to FIGS. 8 to 10, to the explanation of which reference is made.

In a departure from the embodiment according to FIGS. 8 to 10, the stirrups 12 made of spring wire are not supported radially in the thread support area 13. The upper bearing surface 62 of its first legs 16 is designed with a smaller diameter, with the result that the spring action can extend over a larger area of the brackets 12. For lateral guidance of the stirrups 12, grooves 760 are provided on the inside of the upper annular disk 61, which is radially enlarged in a manner similar to FIG. 14, into which the stirrups 12 engage in the region of their arches 15 and the ends of their first legs 16. The annular disc 61 radially overlaps the bracket 12; its outboard 770, which partially overlaps the arches 15, also acts as a thread deflector, thereby promoting the thread inlet. In addition, protection against fiber flying from above is achieved in this way.

The lower ring flange 60 is also radially advanced to the straight thread support area 13 of the bracket 12. It is cup-shaped on the outside and provided on its inside with grooves 780, in which the brackets 12 are guided laterally, in such a way that the brackets 12 remain free to move radially. With each bracket 12, the thread support area is bent obliquely at the transition point to the second leg 17, as can be seen from FIG. 18. In addition, cams 79 protruding radially outward are formed on the outer circumferential surface of the ring flange 60 in the manner shown in particular in FIG. 19 and extend in a garland shape between adjacent brackets 12. The brackets 12 are exposed with their thread support area approximately over half the wire cross-section, as indicated at 80 in FIG. 19.

The cams 79 can either extend in the manner of an outwardly convex circular arc between two adjacent brackets 12 or, as indicated at 81, between two adjacent brackets 12 can be formed by two convex radii with an intervening "notch", embodiments also are conceivable in which the cams are delimited by straight chords, as illustrated at 82. As an alternative or in addition, separate tooth-like or finger-like projections 83 can also be provided, which are arranged in the area between adjacent brackets 12.

In order to prevent thread loops from reaching between the stirrups 12 and the ring disk 68 in the area of the cams 79, it is expedient that the cams 79 in the direction shown in FIG. 20 in the axial direction at 84 are higher than the oblique bending of the thread support areas 13 whose transition to the second arm legs 17.

21 finally illustrates an embodiment in which the substantially L-shaped brackets are each formed with two fork-shaped first bracket legs 16 which are held in a corresponding recess 181a in the upper annular flange 61 in a radial plane to the drum axis. Following the straight thread support area 13, each bracket 12 is inserted on the opposite side with its fastening part 180 into a corresponding recess 182 of the lower ring flange 60.

The bracket 12 can also be designed as sleeves or turned parts in this embodiment, so that the two first stirrup legs 16 are formed by producing a molded cone.

Claims (40)

1. Thread storage and delivery device, in particular for textile machines, with a storage drum, which has a number of equal radial spacings from the drum axis and in the circumferential direction evenly arranged elongate thread support elements, which are essentially held in the drum axis direction on a drum body at least at one end and which form a thread support for a plurality of turns of a storage winder in a thread support area, as well as thread feed and discharge elements assigned to the storage drum on the thread feed or discharge side, and with a drive device for achieving a relative rotational movement between the storage drum and the thread feed and discharge elements characterized in that the thread support elements are formed by essentially L-shaped or U-shaped narrow, mass-arm brackets (12) which are guided or fixed at the other end to the drum body (5) or a part connected thereto, and in that each bracket El (12) on the thread feed side is assigned a region (14) which tapers radially inwards towards the thread outlet side,. which is followed by a thread support area (13) on the bracket (12). 2. Apparatus according to claim 1, characterized in that at least the thread support area (13) is curved outward to concave. 3. Device according to claim 1, characterized in that the thread support region (13) is substantially straight. 4. Device according to one of the preceding claims, characterized in that the brackets (12) are guided at least in places resiliently and at the other end with respect to the drum body (5) in a radially limited manner. 5. The device according to claim 4, characterized in that the bracket (12) each have a substantially radially with respect to the drum body (5), optionally elastic first bracket leg (16). have with which they are attached to the drum body (5). 6. The device according to claim 5, characterized in that each first bracket leg (16) in the vicinity of the attachment point on the drum body (5) or an associated part (61,69) is guided laterally. 7. The device according to claim 5 or 6, characterized in that each first bracket leg (16) with a bent fastening part (180) in the drum body (5) or a part connected thereto is inserted and held in this. 8. Device according to one of claims 5 to 7, characterized in that the bracket (12) on the first bracket leg (16) opposite side of the thread support area (13) a substantially radially with respect to the drum body (5) extending second bracket leg (17th ) which is designed as a guiding and / or holding element with corresponding guiding and / or holding devices (18, 36) of the drum body (5) or a part (34, 60, 76) connected to it. ₉ . Device according to claim 8, characterized in that the brackets (12) are guided laterally and / or radially with their second bracket legs (17). 10. The device according to claim 6 or 9, characterized. is characterized in that the drum body (5) or a part connected to it has slots (18; 141) in which the bracket legs (16 and 17) are guided. 11. The device according to claim 10, characterized in that at least in the region of an end wall of the substantially pot-shaped circular cylindrical drum body (5) slots (18) are arranged, in which bracket legs are guided. 12. The apparatus according to claim 8, characterized in that every second bracket leg (17) is inserted with a bent fastening part (180) in the drum body (5) or a part connected thereto and is held in this. 13. The apparatus according to claim 12, characterized in that the fastening parts (180) of the two bracket legs (16, 17) aligned coaxially to each other and are inserted in corresponding recesses (181, 182) of the drum body (5) or a part connected thereto. 14. The apparatus according to claim 13, characterized in that the fastening part (180) of the first or second leg (17) in the associated recess (181, 182) is guided with lateral play. 15. The device according to one of claims 8 to 14, characterized in that the bracket (12) with wenia at least one of its stirrup legs (16, 17) or a part of the thread support area (13) are pretensioned on an associated support surface (21; 62, 63) of the drum body (5) or a part connected to it in the drum axis direction. 16. Device according to one of claims 5 to 15, characterized in that the brackets (12) on one side of the thread support area (13) with respect to the drum body (5) are supported radially outwards. 17. The device according to one of claims 3 to 16, characterized in that the brackets (12) are elastically biased radially outwards. 18. The apparatus according to claim 17, characterized in that the other radially limited movable bracket (12) with their thread support area (13) lie on a coaxial to the drum axis circular cone. 19. The apparatus according to claim 16 or 17, characterized in that the drum body (5) has or carries at least one disk-shaped or star-shaped support part (34) for the bracket (12) on the support and optionally guide surfaces (36; 86) are designed for the bracket (12). 20. The apparatus according to claim 19, characterized in that the circular disc-shaped support part (34) on its outer peripheral surface (35) is bead-like. 21. The apparatus according to claim 20, characterized in that the support part (34) on its outer peripheral surface (35) from a thread drain ring (37). wear-resistant material. 22. Device according to claims 16 and 19, characterized in that the bracket (12) on its second bracket legs (17) have bent holding parts (52) with which they can be supported on the support part (53). 23. Device according to one of claims 5 or 8 to 22, characterized in that the first and / or second bracket legs (16; 17) at least in sections by a cover element (22; 60) placed on or arranged on the drum body (5). 61) are covered. 24. Device according to one of the preceding claims, characterized in that each bracket (12) has at least two thread support areas (13a, 13b) separated from one another by a radially projecting bead-like separating area (40). 25. Device according to one of the preceding claims, characterized in that each bracket (12) on the thread outlet side to the thread support region (13) then has a radially outwardly widening region (41), and that the widening regions (41) of all Bracket (12) lie on an imaginary rotating body. 26. Device according to one of the preceding claims, characterized in that the brackets (12) at least at least one point radially inside at least wear a thread deflection ring (65, 66) which is coaxial with the drum axis and is held on the brackets (12). 27. The device according to claims 25 and 26, characterized in that a thread deflection ring (66) in the bead-like radially outwardly widening region (41) of the bracket (12) is arranged. 28. The apparatus of claim 26 or 27, characterized in that the substantially U-shaped bracket (12) on both sides of the thread support area (13) with two thread deflection rings (65, 66) are connected. 29. The device according to one of claims 26 to 28, characterized in that the brackets (12) are guided laterally on at least one of the thread deflecting rings (65, 66). 30. Device according to one of the preceding claims, characterized in that the thin-walled, substantially cup-shaped drum body (5) consists of plastic material. 31. The device according to claim 30, characterized in that the drum body (5) in the areas between the brackets (12) has slot-like openings (29). 32. Device according to one of the preceding claims, characterized in that the brackets (12) consist of a thin spring wire. 33. Device according to one of the preceding claims, characterized in that the brackets (12) acting as fan blades (42) carry parts (38). 34. Apparatus according to claim 33, characterized in that the brackets (12) formed as flat shaped parts in the thread support area (13) are designed as fan blades (42). 35. Device according to one of the preceding claims, characterized in that the brackets (12) lie in planes which are tangential to a rotational body coaxial to the drum axis (11). 36. Device according to one of the preceding Ans ^p RUE che, characterized in that the tapered portion is formed on the thread feed side on each bracket (12) (14). 37. Device according to one of claims 1 to 35, characterized in that the tapering region on the thread feed side is formed on at least a part (69) of the drum body (5) or a part (73) connected to this, which is via the bracket (12) protrudes radially outwards. 38. Device according to one of the preceding claims, characterized in that on the drum body (5) or a part connected thereto, the bracket (12) are alternately attached at both ends and only at one end, and that the bracket (12) attached at only one end at the other the drum body (5) or a part connected to it are guided radially and / or laterally. 39. Device according to one of the preceding claims, characterized in that the storage drum (4) on the thread feed side at least one Thread deflector (43) is assigned, which reaches up to the imaginary circular cone on which the tapered regions (14) of the brackets (12) lie. 40. Apparatus according to claim 39, characterized in that the thread deflector (43) has a substantially convex thread-deflecting edge or surface (44, 46) arranged on the side of the storage drum (4).

Images