EP2155943B1 - Circular knitting machine for the production of knitwear by at least partly using fiber materials - Google Patents

Abstract

A circular knitting machine for the production of knitted goods by at least partially using fiber materials is described. The circular knitting machine includes drafting devices (8b) associated with the individual knitting systems (6) to feed and attenuate slivers (10), flyer frame slivers or the like, and also drive units (28) operatively connected to the drafting devices (8). According to the invention, the drafting devices (8) are arranged below and the drive units (28) are arranged above a partition and mounting wall (26) separating them in a fiber-tight arrangement, wherein the drive units (28) are coupled to drafting rollers (35, 36) of the drafting devices (8b) through the partition and mounting wall (26) (FIG. 3).

Description

The invention relates to a circular knitting machine of the type specified in the preamble of claim 1.

Known circular knitting machines of this type (eg PCT WO 2004/079068 ) are distinguished by the fact that, instead of conventional yarns, predominantly or exclusively threads are used for stitch formation, which consist of stretched fiber materials. These fiber materials are stretched immediately before the stitch formation with the aid of drafting systems associated with the knitting systems, to which fly-downs, drawstrings or the like are fed as primary materials. If necessary, these fiber materials between the drafting and the knitting systems can be converted with the help of spinning devices into temporary yarns with real rotations, which enable transport of the sensitive fiber materials even over longer distances and disappear before the loop formation by the false-twist effect again. Therefore, the stitching is done not with the help of conventional yarns, but with the help of threads that have little or no twists.

A problem with circular knitting machines of this type is that it due to the processing of Flyerlunten, conveyor belts od. Like. To a strong linting in the knitting systems comes, which od with flying fibers, dirt particles. Like. Is connected. This applies regardless of whether the fiber material consists of pure cotton or any suitable fiber mixture. As a result, especially the drive units used to drive the drafting systems, since they are largely exposed, tend to so fast a contamination that frequent cleaning work must be performed, which interferes with the knitting process. Or it must be provided comparatively elaborate constructions, which complicates necessary operation and maintenance.

As WO 2007/093165 A2 published EP1984550 belongs to the state of the art according to Article 54 (3) EPC and describes a circular knitting machine with a cover plate at the upper end of the drafting device housing, are guided by the coupling pins between drive units and Riemchen assemblies.

Based on this, the invention is the technical problem underlying the circular knitting machine the genus described above in such a way that with relatively simple means a largely trouble-free operation of the drive units and thus the circular knitting machine can be ensured. In addition, a cost-effective drive system for the drafting systems are proposed.

To solve this problem, the characterizing features of claim 1.

The invention has the advantage that the partition wall a fiber-tight separation of the underlying lying, responsible for the unwanted generation of fiber fly drafting rollers of the above the partition wall arranged drive units allows the od optimally against flying around fibers od. The like. Protected. In addition, the partition simultaneously creates a mounting plane to which all important for the fiber supply components, in particular the drafting units and their drive units can be mounted. With particular advantage, the dividing wall is arranged at such a height above the usual working space, in particular above the knitting systems of the circular knitting machine, that the drafting systems do not constitute a significant impediment to the operators working on the circular knitting machine, but are still within their gripping range.

Further advantageous features of the invention will become apparent from the dependent claims.

• Fig. 1 einen schematischen Vertikalschnitt durch eine bereits vorgeschlagene Rundstrickmaschine zur Herstellung von Strickwaren unter zumindest teilweiser Anwendung von Fasermaterialien;
• Fig. 2 eine Draufsicht auf die Rundstrickmaschine nach Fig. 1 unter Weglassung eines Hilfsfadens und unter Hinzufügung von Spinnvorrichtungen;
• Fig. 3 einen schematischen Vertikalschnitt durch eine Rundstrickmaschine mit einer erfindungsgemäßen Trennwand;
• Fig. 4, 5 und 6a, 6b verschiedene Arten von mit der Trennwand nach Fig. 3 verbindbaren Streckwerken;
• Fig. 7a eine perspektivische Ansicht einer ersten Ausführungsform eines mit der Trennwand nach Fig. 3 verbindbaren Einschubteils für Streckwerksorgane;
• Fig. 7b und 7c eine zweite Ausführungsform des Einschubteils in einer perspektivischen Ansicht und einer Draufsicht;
• Fig. 8 eine schematische Draufsicht auf eine Antriebseinheit in Form eines erfmdungsgemäßen Tangentialriemenantriebs;
• Fig. 9 eine Riemenscheibe des Tangentialriemenantriebs nach Fig. 8;
• Fig. 9a und 9b je eine der Riemenscheibe nach Fig. 9 zugeordnete Hilfsrolle;
• Fig. 10a eine Unteransicht eines Segments der Trennwand nach Fig. 3 mit Blick auf einige daran montierte Streckwerke gemäß einer ersten Variante;
• Fig. 11a eine schematische Draufsicht auf das Segment nach Fig. 10a, wobei die vertikal und unterhalb des Segments angeordneten Streckwalzen und Getriebeteile strichpunktiert dargestellt und die horizontalen Walzen weggelassen sind;
• Fig. 12a eine schematische und perspektivische Ansicht einer Antriebseinheit und der Getriebeteile nach Fig. 11a unter Weglassung des Trennwand-Segments;
• Fig. 10b bis 12b den Fig. 10a bis 12a entsprechende Ansichten gemäß einer zweiten Variante;
• Fig. 12c die Vorderansicht einer Antriebseinheit für ein Eingangswalzenpaar der Streckwerksanordnungen nach Fig. 10a bis 12b;
• Fig. 12d eine Seitenansicht einer Antriebseinheit für die Streckwalzen einer Faltungszone der Streckwerksanordnung nach Fig. 10a bis 12a in Richtung eines Pfeils u in Fig. 12a;
• Fig. 12e eine Seitenansicht entsprechend Fig. 12d einer Antriebseinheit für ein weiteres Walzenpaar der Streckwerksanordnung nach Fig. 10a bis 12a;
• Fig. 12f die Vorderansicht einer Antriebseinheit für ein Ausgangswalzenpaar der Streckwerksanordnungen nach Fig. 10a bis 12b;
• Fig. 12g eine Seitenansicht einer Antriebseinheit für die Streckwalzen einer Faltungszone der Streckwerksanordnung nach Fig. 10b bis 12b in Richtung eines Pfeils v in
• Fig. 12b, wobei ein an sich nicht sichtbares Stirnrad um 90° aus der Zeichenebene herausgedreht dargestellt ist;
• Fig. 13 eine perspektivische Draufsicht auf eine komplette Trennwand der Rundstrickmaschine nach Fig. 3 mit darauf befestigten Antriebseinheiten;
• Fig. 14 eine der Fig. 13 entsprechende Ansicht, jedoch nach der Befestigung einer die Antriebseinheiten abdeckenden Abdeckung auf der Trennwand;
• Fig. 15 und 16 je eine Unteransicht und Draufsicht eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Trennwand-Segments mit daran montierten Streckwerksteilen;
• Fig. 17 eine Draufsicht auf eine Mehrzahl von nebeneinander angeordneten Segmenten gemäß Fig. 15 und 16;
• Fig. 18 eine Seitenansicht eines Trennwand-Segments nach Fig. 15 und 16;
• Fig. 19 bis 21 je eine perspektivische Ansicht des Trennwand-Segments nach Fig. 18 mit drei Einschubteilen, von denen sich jeweils eines in einem vom Trennwand-Segment abgezogenen Zustand befindet;
• Fig. 22 und 23 je eine Seitenansicht und Draufsicht eines mit der Trennwand nach Fig. 3 verbundenen Düsenstocks; und
• Fig. 24 eine Seitenansicht eines zweiten Ausführungsbeispiels des Düsenstocks.

The invention will be explained in more detail below in connection with the accompanying drawings of exemplary embodiments. Show it:

• Fig. 1 a schematic vertical section through an already proposed circular knitting machine for the production of knitwear with at least partial application of fiber materials;
• Fig. 2 a top view of the circular knitting machine after Fig. 1 omitting an auxiliary thread and with the addition of spinning devices;
• Fig. 3 a schematic vertical section through a circular knitting machine with a partition according to the invention;
• Fig. 4 . 5 and 6a . 6b different types of with the partition behind Fig. 3 connectable drafting systems;
• Fig. 7a a perspective view of a first embodiment of a with the partition after Fig. 3 connectable insertion part for drafting device organs;
• Fig. 7b and 7c a second embodiment of the insertion part in a perspective view and a plan view;
• Fig. 8 a schematic plan view of a drive unit in the form of an inventive Tangentialriemenantriebs;
• Fig. 9 a pulley of Tangentialriemenantriebs after Fig. 8 ;
• Fig. 9a and 9b one after each of the pulleys Fig. 9 assigned auxiliary role;
• Fig. 10a a bottom view of a segment of the partition after Fig. 3 with regard to some drafting equipment mounted thereon according to a first variant;
• Fig. 11a a schematic plan view of the segment after Fig. 10a wherein the stretching rollers and gear parts arranged vertically and below the segment are shown in phantom and the horizontal rollers are omitted;
• Fig. 12a a schematic and perspective view of a drive unit and the transmission parts according to Fig. 11a omitting the partition segment;
• Fig. 10b to 12b the 10a to 12a corresponding views according to a second variant;
• Fig. 12c the front view of a drive unit for an input roller pair of the drafting arrangements after Fig. 10a to 12b ;
• Fig. 12d a side view of a drive unit for the draw rolls of a folding zone of the drafting arrangement after 10a to 12a in the direction of an arrow u in Fig. 12a ;
• Fig. 12e a side view accordingly Fig. 12d a drive unit for a further pair of rollers of the drafting arrangement after 10a to 12a ;
• Fig. 12f the front view of a drive unit for a pair of output rollers of the drafting arrangements after Fig. 10a to 12b ;
• Fig. 12g a side view of a drive unit for the draw rolls of a folding zone of the drafting arrangement after Fig. 10b to 12b in the direction of an arrow v in
• Fig. 12b in which a spur wheel, which is not visible per se, is shown rotated out of the plane of the drawing by 90 °;
• Fig. 13 a perspective top view of a complete partition of the circular knitting machine according to Fig. 3 with drive units mounted thereon;
• Fig. 14 one of the Fig. 13 corresponding view, but after the attachment of a drive units covering cover on the partition wall;
• Fig. 15 and 16 each a bottom view and top view of a second embodiment of a partition wall segment according to the invention with drafting parts mounted thereon;
• Fig. 17 a plan view of a plurality of juxtaposed segments according to Fig. 15 and 16 ;
• Fig. 18 a side view of a partition wall segment after Fig. 15 and 16 ;
• Fig. 19 to 21 depending on a perspective view of the partition wall segment Fig. 18 with three insertion parts, one of which is in a withdrawn from the partition wall state each state;
• FIGS. 22 and 23 depending on a side view and top view of one with the partition after Fig. 3 connected nozzle sticks; and
• Fig. 24 a side view of a second embodiment of the nozzle block.

Fig. 1 and 2 schematically show a circular knitting machine 1 with a rotatable needle cylinder 2, are mounted in the knitting needles 3 slidably. In front of the circular knitting machine 1 or in a surrounding area, a working space 4 is schematically indicated, in which an operator 5 stops during normal work on the circular knitting machine 1. The height of the circular knitting machine 1 is dimensioned in a conventional manner so that a plurality of stitch forming or knitting systems 6, which are formed by lock parts, not shown, and of which in Fig. 1 only one is shown in the grip area of the operator 5 is located. The term "grip area" is understood to mean that area which is preferably arranged at an ergonomically particularly favorable distance above a ground floor 7 or the like, on which both the circular knitting machine 1 and the operator 5 are standing.

The circular knitting machine 1 of interest in the context of the present invention is designed as a so-called spinning knitting machine. Each knitting system 6 is assigned a drafting device 8 to which a sliver taken from a can 9, a flyer drawn from a supply reel or other fiber material 10 is supplied. This fiber material 10 is refined in the drafting device 8 in a conventional manner to a thread 11 and preferably presented by means of a thread guide 12 the knitting needles 3 for stitch formation. With the reference numeral 14 is Furthermore, an auxiliary thread indicated that the yarn guide 12 can also be supplied, in particular if the fabric additionally z. B. should be provided with a plating thread or an elastic thread.

Mesh-forming machines of the type described are those skilled z. B. from the aforementioned publication PCT WO 2004/079068 A2 known.

After another, older proposal of the same applicant ( PCT WO 2007 / 0931- 66), the drafting devices 8 are arranged such that, like the knitting systems 6, they lie in the gripping region of the operator 5 working on the circular knitting machine 1, but above this. For this purpose, the drafting 8 z. B. attached to a support ring 15 which is supported by means of columns 16 on a base or lock plate 17 of the circular knitting machine 1. In addition, the arrangement is such that the clamping lines formed by three or more pairs of drafting rollers 18 of the drafting units 8 lie in vertical planes. This is achieved by arranging the axes of the drafting rollers 18 vertically in a fitted state. In order to achieve that the drafting units 8 are not only accessible to the operator 5 from the working space 4, but also easily maintained and / or repaired without having to dismantle them completely, the drafting units 8 can be at least partially opened by their so-called top rollers 18a ( Fig. 2 ) are attached to a pressure arm 19 which, in contrast to the conventional technique, is located on the side instead of at the top and can be pivoted in the direction of an arrow v about an exemplarily indicated vertical pivot axis 20.

So that the threads 11 even when the drafting 8 after Fig. 2 have a greater distance from the circumference of the needle cylinder 2, can be safely inserted into the knitting needles 3, according to Fig. 2 preferably additional spinning devices 21 between the drafting 8 and the Fadenführem 12 is provided. These spinning devices Contain 21, as is known from the cited documents, z. The spinning devices 21 serve the purpose of first converting the emerging from the drafting 8 threads 11 into temporary yarns with real rotations, which between the Ends of the spinning tubes 23 and the knitting systems 6 due to the so-called. False-wire effect be resolved again.

Since the drafting rollers 18 are vertical, they can be easily driven by extending in the circumferential direction of the needle cylinder 2, circularly mounted drive belt. For this it is only necessary, the waves of each so-called lower roller of the three roller pairs shown at their upper ends z. B. to be provided with a toothed belt pulley, as explained below.

Finally, according to the embodiment of the Fig. 1 and 2 Particularly advantageous to arrange two or more drafting 8 with their rollers 18 coaxial one above the other. Such a multiple or double or tandem design makes it possible to halve or even reduce the space required in the circumferential direction for the drafting units 8, since in this case two or more threads are guided to adjacent knitting systems 6 by each drafting system segment can, like that in Fig. 1 is indicated by two threads 11. As a result, the packing density of the drafting systems can be doubled or multiplied.

Fig. 3 shows a circular knitting machine, which like the circular knitting machine 1 after Fig. 1 and 2 may also have a second needle contour, as shown schematically by additional, z. B. arranged in a dial Ripple knitting needles 25 is indicated. Unless otherwise stated, are in Fig. 3 In addition, the same parts with the same reference numerals as in Fig. 1 and 2 Mistake.

The circular knitting machine 1 after Fig. 3 has according to the invention instead of the support ring 15 or in addition to this, a partition 26, the transverse and preferably perpendicular at the same time the axis of rotation of the needle cylinder 2 ( Fig. 1 ) forming, usually vertically extended machine axis 27 and expediently arranged coaxially to this and, for example, plate-shaped. Below the partition wall 26, as will be explained in more detail, mounted around the machine axis 27 arranged drafting 8, while above the partition 26 for driving the drafting rollers required drive units 28 and, if necessary, also elements of the detonation serving blowing and suction system for the Stretching rollers and / or a nozzle block for the spinning devices are arranged. The partition wall 26 is formed and / or arranged to effect a fiber-tight separation of the drive units 28 from the drafting units 8, by "fiber-tight" meaning that the fibers, fluff, dirt particles, etc. produced by the drafting units 8 pass through the partition wall 26 are largely prevented from the drive units 28 and also do not pass through openings provided in the partition 26 through to the drive units 28. Therefore, the partition wall 26 preferably covers all existing drafting systems with its projection. In addition, the partition wall 26 is at the same time a mounting wall for the said components, but it is hereinafter referred to simply as a partition for the sake of simplicity.

The partition 26 is attached in a manner not shown on a machine frame of the circular knitting machine, the z. B. the base or lock plate 17 ( Fig. 1 ) contains. From the base plate 17 preferably project analogously Fig. 1 a plurality of support columns distributed around the machine axis 27 and supporting a circumferential support ring to which the partition wall 26 or a plurality of segments are secured therefrom. Alternatively or additionally, the partition 26 may be supported in a radially remote from the machine axis 27 area by means of further support columns 29 on the ground 7, thereby better intercept the weight of the attached to her drafting 8 and drive units 28. Incidentally, the partition wall 26 integrally formed and z. B. as a coaxial with the machine axis 27 arranged, preferably circular plate, as a coaxial with the machine axis 27 arranged ring, in particular circular ring, or conical.

Also, an inclined to the machine axis 27 arranged partition 26 is possible. Alternatively, however, it is also possible to assemble the plate or the ring of a plurality of the machine axis 27 surrounding and fiber-tight abutting segments, which are preferably identical and each carry an associated drafting 8 or an associated drafting arrangement. All these possible embodiments are described and claimed for simplicity by the words "across the machine axis".

As Fig. 3 shows further, the partition wall 26 is preferably provided on its upper side with a fiber-tight attached to her, preferably dome-shaped cover 30 which forms with her an annular, fiber-tight closed housing for receiving the drive units 28, so that they are not by inside or outside the Partition 26 around flying fibers can be contaminated. If the dividing wall 26 is annular, the cover 30 can be supplemented by the machine axis 27 by further covering elements 31, 32 which bound a fiber-tight space. The auxiliary threads 14 are in this case z. B. led by means of a tube 33 through this space to the knitting systems 6.

The drafting units 8 and the spinning devices 21 are preferably associated with a central suction 34 with coaxially arranged tubes 34a, 34b, which is connected to a suction device schematically indicated by the name pu and communicates with the space between the cover elements 31, 32.

Of the tube 34a lead suction channels 34c to be vacuumed to the rollers of the drafting 8. The extracted fibers are z. B. supplied from a card to the process as circulation material again.

The pipe 34b of the central suction also detects with channels 34d all outlets which exit between the spinning tubes of a spinning device 21 at the transition points from a spinning system to a subsequent spinning system. These outlets consist of shell parts and unspinnbaren short fibers. They are not recycled.

The channels 34a, 34b of the central suction 34 are arranged concentrically, whereby all associated, radially extending suction channels 34c, 34d have the same negative pressure conditions within their category.

At the bottom of the partition 26, the fiber guiding systems 8 are attached. As Fig. 3 shows schematically, they may deviate from Fig. 1 and 2 horizontally arranged draw rolls 35 and / or vertically arranged draw rolls 36 have. The horizontal drafting rollers 35 of a pre-drafting field are preferably rotatably mounted in one or more, preferably extractable drafting device housings 37, which are connected by means of screws, bayonet catches or the like, preferably easily releasably connected to the partition wall 26. In contrast, the vertical drafting rollers 36 of a main drafting zone z. B. with the partition wall 26 perpendicular projecting waves or stub shafts 39, which are rotatably mounted in above the partition wall 26 at this fixed bearings. Alternatively, the shafts 39 may be connected via the partition 26 by projecting coupling elements 40 with associated drive elements of the drive units 28, as in Fig. 3 indicated schematically and explained in more detail below.

4 to 6 show exemplary different, optionally connectable to the partition 26 drafting system types. It is understood, however, that other types of drafting can alternatively be provided.

Fig. 4 shows a simple 3-roller drafting system, as used for example in the processing of Flyerlunte which is supplied to the drafting means by means of an attached to the partition 26 insertion funnel 43 in the direction of an arrow w . The fiber material leading pairs I, II and III of draw rolls, of which in Fig. 4 in each case only one roller 44, 45 and 46 is visible, are mounted in a flying manner on the dividing wall 26, ie the draw rolls 44, 45 and 46 protrude from their in Fig. 4 not shown bearings down freely. Between the pairs I and II can be formed by intermediate pieces 47 Faserleitkanal, which facilitates the threading of the fiber material, while between the pairs II and III a Fiber guide may be provided by conventional 48 straps, which form a strap assembly with the center rollers 45. The straps 48 associated turning rails or deflecting elements are not shown separately.

The drive units required for driving the drafting rollers 44 to 46 are fastened to the latter above the dividing wall 26 and are in operative connection through the dividing wall 26 with associated drafting rollers 44, 45 and 46. In particular, on the partition wall 26 z. B. a rotatably projecting drive shaft 49 rotatably provided with a arranged above the partition wall 26 spur gear 50 and is coupled above or below the partition wall 26 with a driving (sub) roller of the pair of input rollers I. On a further, the partition 26 preferably also protruding drive shaft 51 for the draw roll 45, which forms the lower roll of the middle roll pair II, a spur gear 52 and in a plane above a pulley 53 are attached. Finally, on a further, the partition 26 z. B. penetrating drive shaft 54 for the draw roll 46, which is the lower roll of the output roller pair III, a pulley 55 is attached. The pulley 53 is z. B. by means of a first drive belt, not shown, and the pulley 55 by means of a likewise not shown, second drive belt driven, as explained in more detail below. Because of the engagement of the spur gears 50, 52 in an unillustrated transmission gear drives the first drive timing belt at the same time the input roller 44, wherein by selecting the numbers of teeth of the spur gears 50, 52, a preselected pre-distortion between the roller pairs I and II can be produced. Alternatively, the two spur gears 50, 52 may also be coupled by an endless toothed belt to drive them in the same direction of rotation. In the Fig. 4 invisible top rollers of the roller pairs I, II and III are z. In conventional compression arms (eg 19 in Fig. 2 ) and biased by spring force. Like. Against the lower rollers 44, 45 and 46 biased so that they are offset by these by friction in revolutions.

Fig. 5 shows details of a double, analogous to Fig. 1 and 2 formed 3-roller drafting system 8a. This is different from the one after Fig. 4 mainly in that the three drafting system pairs I, II and III form two tracks for each fiber strand, which extend below the partition wall 26 in two superimposed planes. For this purpose, on the one hand two superimposed insertion funnels 43a, 43b attached to the partition wall 26, while on the other hand the turn vertical and perpendicular to the partition wall 26 drive shafts 49, 51 and 54 each with two coaxially stacked draw rolls 44a, 44b, 45a, 45b and 46a, 46b are coupled. In addition, straps 48a, 48b may be provided, which together with the center rollers 45a, 45b each form a strap assembly. As a result, the exiting from the drafting fiber materials by means of two spinning devices 21 a and 21 b z. B. two adjacent knitting systems of the circular knitting machine supplied.

As indicated by dashed lines, the strap assemblies are disposed in a common insertion portion 56 which is normally secured to the dividing wall 26 during operation of the circular knitting machine, but upon release of preferably easily detachable fasteners in the direction of an arrow x downwardly can be pulled out of the drafting 8a. As further indicated by a schematically illustrated coupling 40, the shaft on which driven strap assemblies are seated can be decoupled upon withdrawal of the insertion portion 56 from the overlying pulley 53 and coaxial drive shaft 51. The periodically necessary change of straps is facilitated by this design.

To the output rollers 46a, 46b is preferably followed by a nozzle 59, which consists essentially of a closed housing in which further functional parts described below, for blowing the output rollers 45a, 46b certain air nozzles, suction channels for loose fibers and air supply for pneumatic twist elements 22a, 22b of spinning devices 21a, 21b (cf. Fig. 2 ) are housed. The nozzle 59 may also be formed as a downwardly withdrawable insertion part, which is easily detachably connected to the partition wall 26.

In a corresponding manner, the output rollers 46a, 46b could be arranged in an insertion part, which is connected to a further coupling with the drive shaft 54 and decoupled from this. In contrast, the driven rolls of the pair I, since they are a greater radial distance from the machine axis 27 (FIG. Fig. 3 ) of the circular knitting machine 1, in analogy in Fig. 2 preferably mounted on a common, not shown, pivotable to the side of the pressure arm, which could also be replaced by two individual pressure arms.

The embodiment of a drafting 8b after Fig. 6a , which is largely according to Fig. 3 corresponds, differs from that Fig. 5 in that it is designed as a 4-roller folding drafting system, which is preferably used for processing conveyor belts. For this purpose, in operation, horizontal drafting rollers 61 of an input pair I and, with them, a pre-drafting zone, likewise horizontal drafting rollers 62 of a second pair II are arranged in the side walls of an insertion part 63 during operation. The insertion part 63 is analogous to the insertion part 56 after Fig. 5 easily detachably attached to the partition wall 26 and can be withdrawn in the direction of an arrow z down from the drafting 8b out or from the partition wall 26. In this way, it is possible to completely expose the space in front of subsequent apron assemblies 64 of a pair III of drafting system members, to which an output pair IV of drafting rollers 65 adjoins in the transport direction of the fiber material. The pairs in and IV of the drafting rollers are z. B. analogous to Fig. 5 The pairs II and III represent a folding zone, wherein the distance between the draw rollers 62 of the pair II and those of the pair III is selected so that the fiber flow exiting from the second pair II through the pair III is folded in a characteristic manner, as proposed in a further, earlier application of the same Applicant ( PCT WO 2007/093164 ).

The driving (sub) rollers of the pairs III and IV are arranged vertically during operation and are therefore preferably analogous to Fig. 5 driven. Since the axes of the drafting rollers 61, 62 of the first two pairs I and II are arranged horizontally can not be directly transmitted through the vertical drive shafts 49 (FIG. Fig. 5 ) corresponding drive shafts are driven. Therefore, between a provided here with the spur gear 50 drive shaft 66 and the lower rollers 62 supporting shaft of the second pair II z. B. a bevel gear 67 and a like in Fig. 3 and 6 each indicated by a black triangle indicated clutch 40. When pulling out or inserting the insertion part 63, therefore, the drafting rollers 62 are coupled via the bevel gear 67, the clutch 40 and the spur gears 50 and 52 drivingly with the drive shaft 51 and the pulley 53. Similarly, the shafts of the lower rollers 61 are coupled via a bevel gear 68 and a clutch 40 to a vertically disposed drive shaft 70 provided with a pulley 69. This makes it possible to arrange all provided above the partition wall 26 drive shafts 51, 54, 66 and 70 vertically.

Incidentally, the drafting device 8b is after Fig. 6 like the drafting system after Fig. 5 formed as a tandem drafting system, which has two identical pairs of drafting rollers in superimposed planes and thus two webs for drawing two fiber material strands. The reference numeral 47a also fiber guide channels are indicated, which by the intermediate pieces 47 after Fig. 4 and 5 corresponding intermediate pieces are formed.

The embodiment according to Fig. 6b is different from that Fig. 6a in that the insertion parts 56 and 63 are pivotally mounted instead of displaceable on the partition wall 26. For this purpose, a pivot point 134 is provided on the underside of the partition wall 26, by means of which a support arm 132 is pivotally mounted (arrow a ) on the partition wall 26 and by means of a screw 133 od. Like. Solder is attached to this. In addition, a pivot point 134 is provided on the underside of the insertion part 63, by means of which a support arm 135 is pivotally mounted (arrow b ) on the insertion part 63 and by means of a screw 136 od. Like. Solder is connected to this. The insertion part 56 is fastened to a part of the support arm 135 projecting beyond the insertion part 63 in the direction of the fiber transport. The Overall arrangement is also chosen such that by loosening the screw 133 both insertion parts 63 and 56 can be pivoted together by means of the support arm 132 in the direction of arrow a . In addition, the strap assemblies 64 become accessible by loosening the screw 136. Both insertion parts 56 and 63 can additionally be opened against each other.

Apart from that shows Fig. 6b Also, more specifically, an exemplary rotatable mounting of the drive shafts 51, 54, 66 and 70 by means of mounted on the partition 26 bearings 137 to 140 and a possible formation of the couplings 40 (FIG. Fig. 5 and 6a ). In the exemplary embodiment, these contain, on the one hand, coupling pins 75 which seat at the front ends of intermediate shafts 141, 142 leading to the bevel gear drives 67, 68. Also, coupling pins for the drafting rollers 143 are present. On the other hand, the couplings 40 comprise coupling sleeves 76 which are adapted to the coupling pins 75 and which are formed at the front ends of the associated drive shafts 51, 66 and 70. The arrangement is also chosen so that a pivoting or displacement of the insertion parts 56, 63 in the direction of arrows a , b or the arrows x , z automatically disconnecting or locking of each mutually associated coupling parts 75, 76 result.

The drive shafts 51 and 66 and the spur gears 50, 52 of the spur gear are preferably arranged fiber-tight in a housing attached to the partition 26.

It is understood that the basis of the Fig. 3 to 6b illustrated drafting 8, 8a and 8b represent only preferred embodiments. Alternatively, other drafting systems, in particular 5-roller drafting systems can be provided, wherein it by means of the couplings 40 (FIG. Fig. 5 ) and gear 67, 68 ( Fig. 6 ) or similar components, it is possible to arrange all the drive shafts independently of them vertically and essentially above the dividing wall 26, whether the associated draw rolls are arranged vertically or horizontally.

The drive shaft 54 is formed short with respect to the drive shafts 51 and 66. Since the drive shaft 53 rotates at high speed with respect to the drive shaft 51, the kinetic energy inherent in movement is reduced. This facilitates braking in the event of a malfunction.

In the tandem construction according to the invention, at least two drafting arrangements are located one above the other and have common drive elements, which lie above the separating surface 26. -.

In Fig. 7a an insertion part 56 is shown, which for a 3-roller drafting after Fig. 5 is preferably used. The insertion part 56 includes a in the view H-shaped housing 71 which od on the outer sides with long legs 71 a with screw holes, threaded holes 72. Like. Is provided. In a transverse web 71b of the H-shaped housing 71 draw rollers 45a, 45b (= lower rollers) are rotatably mounted. These are at the top and bottom, also in the transverse web 71b mounted stretching rollers 73a, 73b (= top rollers) associated resiliently. In addition, deflecting elements 74 (turning rails) for the upper and lower drafting system are adjustably fastened to the transverse web 71b, via which the straps 48a, 48b are guided in a known manner.

Fig. 7a shows further that z. B. the draw roll 45a or the shaft is axially longer than the adjacent draw roll 73a or the shaft is formed and z. B. the top of the legs 71 a with a z. B. four- or hexagonal coupling pin 75 accordingly Fig. 6b surmounted. This coupling pin 75 acts accordingly Fig. 6b positively with the open towards him coupling sleeve 76 together, attached to the lower end of this strap assembly associated drive shaft 51, also z. B. four or hexagonal and is designed for rotationally fixed receiving the coupling pin 75. Is therefore z. B. the corresponding Fig. 7a trained insertion part 56 of the partition 26 is pivoted or pulled down, then the parts 75 and 76, the in Fig. 5 and 6a represent schematically indicated couplings 40, automatically separated from each other. On the other hand, the arrangement is such that when approaching the insertion part 56 at the partition wall 26 automatically enters the coupling pin 75 in the coupling sleeve 76 and thereby connects the strap assembly with the associated drive shaft 51. After the insertion of the insertion part 56 to the partition wall 26 is its attachment z. B. with the mounting screws 133, 136 ( Fig. 6b ), by means of cooperating, resilient latching elements or otherwise.

By pulling out the insertion part in the direction X, the straps 48a, 48b can be easily exchanged and the turning rails 74 adjusted.

The in the Fig. 6a and 6b shown drafting systems are folding drafting, the insertion parts 56, 63 are designed by a partition 26 either removable or swiveled.

There are two types of construction possible: simple tandem construction and double tandem construction.

In the simple tandem design, two superimposed drafting systems have common drive elements, which lie above and below the parting surface 26 ( Fig. 6a . 6b and Fig. 7a ).

In the double tandem construction, two superimposed drafting systems are assigned in parallel to two further superimposed drafting arrangements and combined to form a drafting system assembly which has common drive elements which lie above and below the dividing wall 26 ( Fig. 6a . 6b and Fig. 7b such as Fig. 12 ).

In a simple tandem construction after Fig. 6a and 6b can be used as insertion part 56, a construction as used in Fig. 7a is shown.

In double tandem design comes as insertion part 56 z. B. an embodiment Fig. 7b for use. It has a cross-shaped housing 71 and is for use after Fig. 6b intended. The housing 71 is connected to a support arm 135 on the insertion part 63 - see Fig. 6b - Connected via a screw 136. After loosening the screw 136, the insertion part 56 can be pivoted. The hatched area of the housing 71 is in the operating state on the partition wall 26.

In the four quadrants of the housing 71 is ever a drafting system. The draw roller 143 is present in duplicate and each provided with the corresponding assignment of straps 48a, 48b, turning rails 74, etc.

The drafting rollers 143 have couplings 40, via which the torque is introduced by the drive members above the dividing wall 26.

The Fig. 7c shows a plan view of Fig. 7b , The dashed circles symbolize the drive shafts 54 - output main delay field - including spring-loaded associated upper rollers. These components are connected to the partition wall 26 via bearings 138. The housing 71 includes the drafting rollers 143 as in FIG Fig. 6b , which are connected via positive clutches 40 to the drive.

Straps 48b are shown which are provided with tensioning means 48c (FIG. Fig. 7c ) be streamlined. There are further adjustable turning rails 74 available. The support arm 135 is indicated.

The drafting rollers 143 at the entrance of the main drafting zone are coupled to one another via the two spur gears 50 and 52. These spur gears 50 and 52 are arranged above the partition 26 - see also Fig. 12a ,

The insertion part 56 can be pivoted away from the partition. As a result, the straps 48a and the turning rails 74 are freely accessible. Changing the straps 48a, 48b and the adjustment of the turning rails 74 is facilitated or possible.

The drive of the drafting systems described can be made in a usual way in drafting equipment. For example, it would be possible, according to each drafting 8, 8a and 8b Fig. 3 to 6b each assign a separate drive motor for the various lower rollers. That would be in Fig. 3 . 6a and 6b three each and in Fig. 4 and 5 each require two drive motors per drafting, which would be comparatively expensive in a multi-system circular knitting machine. A substantial saving could be achieved by driving together associated pulleys of all drafting systems of a circular knitting machine by a tangential belt drive which has a drive motor and a drive belt tangentially surrounding all associated pulleys (eg. PCT WO 2007 / 0931- 66 Fig. 11 ). However, this would result in the disadvantage that in the presence of very many drafting arrangements, the associated pulleys 50, 53, 55 and 69 would only be looped around with a comparatively small wrap angle by the tangential belts resting against them. In addition, the tangential belts could only attach to some of the pulleys if they were deflected several times and thus exposed to alternating bends. However, this is common when using, z. B. designed as a timing belt drive belt undesirable, especially when high rotational speeds required and high torques are to be transmitted because the timing belt would wear out quickly. According to a particularly preferred and presently considered best embodiment of the invention will therefore be 8 to 12 provided apparent drive units.

Fig. 8 shows a plurality of arranged on a circle pulleys 77, wherein, for. B. to the pulleys 53, 55 or 69 of all drafting 8 ( Fig. 4 to 6a ), which are arranged distributed around the machine axis 27 around. Since the drive shafts 49, 51 and 54 are arranged vertically, they can in Fig. 8 shown pulleys 77 are all arranged in one and the same plane. Now, if a drive belt 78 tangentially applied to these pulleys 77 and a drive pulley 79 which sits on the output shaft of a drive motor 80, then follows Fig. 8 that some of the pulleys, in the Fig. 8 are provided with the reference numeral 81, can not be touched by the drive belt 78, unless it is deflected several times. To avoid this disadvantage, at least the pulleys 77 are corresponding Fig. 9 formed as double pulleys, the two axially superimposed portions 77a and 77b for conditioning of in Fig. 8 with a solid line drive belt 78 and a second, in Fig. 7 and 8th have shown with a dash-dotted line drive belt 83. Therefore, the first drive belt 78 becomes corresponding 8 and 9 z. B. tangentially to the portions 77a of the pulleys 77 and the drive pulley 79 placed while the second drive belt 83 is applied tangentially to the portions 77b of the pulleys 77, further to the laid out in the same plane as the portions 77b pulleys 81 and to a tensioning roller 84 , As a result, the pulleys 81 can also be driven tangentially without alternating bending of the drive belts 78 and / or 83. Alternatively, of course, the pulleys 81 may be formed as well as the pulley 77, in which case one of the two portions 77a, 77b would remain free. In addition, the two sections 77a, 77b can be realized by two separate, sitting on the same shaft pulleys.

By the described arrangement of 8 and 9 For example, even if circular knitting machines having needle cylinder diameters of 30 "or more and many knitting systems are provided, it is possible to put the first drive belt 78 around the drive pulley 79 at a sufficiently large wrap angle of, for example, 90 ° By contrast, the pulleys 77 and 81 are only touched with comparatively small angles of wrap of, for example, 10.degree .. This is at least sufficient for those pulleys which only have to overcome the existing bearing friction, which is, for example, the Pulleys 55 and 69 in 4 to 6 true. This is especially true because the second drive belt, if it is a high-system circular knitting machine tangentially applied to a large number of pulleys 77, while the number of driven by him pulleys 81 is relatively small.

With regard to the pulleys 53 z. Example, not only directly associated draw rolls (eg 45), but via the gear 50, 52 ( 4 to 6 ) also adjacent drafting rollers (eg 44) and / or apron assemblies (eg 64 in Fig. 6 ) or are effective via bevel gear 66, 68, so high braking torques can arise that the drive toothed belts 78, 83 preferably used tend to so-called ascending. In such a case, relative movements between the teeth of the drive toothed belts 78, 83 and the teeth of the respective toothed belt pulleys take place, which can lead to jerking movements or even failure of a drive unit. In a preferred variant of Fig. 8 apparent drive unit is therefore provided to each of the pulleys associated with an auxiliary or pressure roller 85, which lays on the outside of the timing belt 78 and 83 and this presses against the pulleys 77 and 81, as in Fig. 8 is shown schematically. If necessary, the auxiliary rollers 85 as the pulleys 77 as double rollers in the sense of Fig. 9 be educated. In addition, the auxiliary rollers 85 are preferably located either directly on the relevant drive belt (eg 78) where it rests against the relevant pulley 77 (FIG. Fig. 9a ), or at a short (eg at most two teeth) Fig. 9b ) in order to avoid the aforementioned harmful bends. Since the auxiliary rollers 85 are only intended to ensure that the teeth of the pulleys and the drive toothed belt remain engaged, it is generally sufficient to place the auxiliary rollers 85 against the pulleys 77, 81 at a small radial distance, ie without direct contact.

10a to 12a and Fig. 10b to 12b on the one hand show a trapezoidally shaped partition wall segment 26a and on the other hand two variants of a mounted on this segment 26a drafting arrangement including the associated drive unit. The drive unit after 10a to 12a differs from the drive unit Fig. 10b to 12b in the transmission of the drive torque to the drafting system organs. The function of the fiber-guiding parts of the drafting device is the same for both variants. The segment 26a has equally long side edges 86a and 86b, a short inner edge 86c that comes to lie radially inward, and one of these opposite, long outer edge 86d. The dimensioning of these edges 86a to 86d is such that a plurality of such segments 26a are juxtaposed in the manner of pie pieces and are arranged around the machine axis 27 (FIG. Fig. 3 ) can be connected to one another in a circumferentially substantially closed ring. This is in Fig. 10a and 10b indicated by two adjacent, partially shown segments 26b and 26c. Between the individual segments 26a to 26c preferably at most remain low, fiber-tight gaps 87, so that the segments can be assembled as a whole into a fäßerdichten partition that completely covers the space between the drafting and the drive units.

Like the bottom view of the Fig. 10a . 10b combined with Fig. 12a . 12b shows, each segment 26a is provided with a drafting arrangement consisting of two accordingly Fig. 6a . 6b trained drafting 8b consists of which in the bottom view according to Fig. 10a . 10b only the two lower pairs of rollers are visible. Each drafting unit 8b therefore contains two pairs I of input rollers 61, which each form a pre-draft zone (warping 6 to 10 times) with the rollers 62 of two further pairs of drafting rollers II. This is followed, in each case, by a strap assembly 64 which forms a folding zone (distortion 10%) with the stretching rollers 62 of pairs II and from the in Fig. 12a . 12b to simplify the illustration, only draw rolls 88, but not associated draw slips 89 (FIG. Fig. 10a . 10b ) are shown. The conclusion form the output rollers 65, which each form a main drafting zone (delay eg 20- to 30-fold) with the apron assemblies 64 and on each of which a nozzle 59 can follow (see each Fig. 6 ). In particular Fig. 12a and 12b show, per segment 26a two such drafting units 8b are connected side by side to a drafting arrangement, which supplies the fiber materials required for four knitting systems, and connected to each other by common drive elements. The lower rollers or driving rollers are in Fig. 10a . 10b and 11a . 11b each hatched. Moreover, as described above, they are so-called folding drafting systems in which the rollers of the pairs I and II are arranged perpendicular to those of the pairs III and IV such that the fiber materials are folded in a characteristic manner between the stretching rollers of the pairs II and III , Such drafting units 8b are particularly suitable for the processing of conveyor belt.

In the illustration after Fig. 10a and 10b these are four folding drafting systems that form one assembly - see also Fig. 6a and 6b , On both sides of a plane of symmetry 98, two folding drafting systems are arranged one above the other.

The delay in the folding zone (pairs II / III) is low. It is determined by transmission technology. The delays of the pre-draft zone and the main draft zone are freely selectable. This requires three synchronous motors to drive all drafting systems.

The Fig. 10a and 10b further show a gear box 97, which via the support arm 132 (FIG. Fig. 6b ) is seated with the pivot point 131 directly on the partition wall segment 26a. From the gearbox 97 protrude on both sides of the rollers 61 and 62 of the pair I / II out. The surrounding components after Fig. 6a such as As the Faserleitkanäle 47a, etc. are not shown.

On the gear box 97 is below the pivot point 134 to which the support arm is articulated, which carries the insertion part 56 which contains the strap assembly (pair III) (see. Fig. 6b ).

The drafting rollers 65 and their shafts protrude through the partition wall 26a (cf. Fig. 6b ), and they are followed by a nozzle 59, which contains spinning and auxiliary organs.

The rubbed rolls are in Fig. 10a and 10b hatched shown. The difference in the versions Fig. 10a and 10b is in the position of the driven rollers of the pairs III with respect to the plane of symmetry 98. This is related to a different arrangement of the drive elements of the pairs II / III, which are located above the partition wall segment 26a. The different arrangement the drive elements is in the Fig. 11a . 11b and 12a . 12b shown. The reason for this lies in the size of the drive torques that occur with different knitting system numbers.

The necessary drive torques for the pairs I and IV are low. It is essentially only the bearing friction to overcome. The fiber material to be distorted only absorbs a power that is negligible. The necessary drive torque for the pair II / III is much larger, since the straps generate a braking torque.

Fig. 11a and 11b each show a plan view of a partition wall segment 26a. The moment for the pair I is achieved via a tangential belt 92 and a toothed belt wheel ZR1, that of the pulley 69 in FIG Fig. 6a corresponds, transfer.

In the variant after Fig. 11a and 12a the moment for pairs II / III is transmitted through a tangential belt 95 to toothed pulleys ZR II / III 1 and ZR II / III 2, which correspond to pulleys 53 in FIG Fig. 6a correspond. The toothed belt wheel ZR II / III 1 directly supplies the pairs III (left) and the pairs II with the spur gears 50 and 52 via an intermediate gear Fig. 6a , The moment flow is in Fig. 11a indicated by a double arrow M1. The pairs III (right) are directly supplied by the toothed belt wheel ZR II / III 2.

The pairs IV each receive the moment via a Tangentialzahnriemen 96, abut the timing pulleys ZR IV 1 and ZR IV 2, each supplying the associated pairs IV and the pulleys 55 in Fig. 6a correspond.

Particularly critical are the wrap angles W ( Fig. 11a ) for driving the pair II / III. For the first variant after Fig. 10a / 11a / 12a arise, depending on the knitting system number, the following wrap angle W: pairs Knitting system number 48 72 96 I 30 ° 20 ° 15 ° II / III 15 ° 10 ° 7.5 ° IV 15 ° 10 ° 7.5 °

The wrap angle W is too small for the pairs II / III at higher system number to transmit the required high power, which is why the second variant after Fig. 10b . 11b . 12b is proposed.

In the Fig. 10b . 11b 12b a preferred embodiment is proposed, which results in a larger angle of wrap W at the pairs II / III. In contrast to the first variant ( Fig. 10a . 11a . 12a ) only one toothed belt wheel ZR IIIIII 1 is present. This results in the following wrap angle W depending on the knitting system number; pairs Knitting system number 48 72 96 I 30 ° 20 ° 15 ° II / III 30 ° 20 ° 15 ° IV 15 ° 10 ° 7.5 °

Besides, here's how Fig. 12b mounted on the drive shaft 51, a spur gear 90 a fixed, which meshes with a spur gear 90 b, which on the drive shaft 66 (FIG. Fig. 6a ) sits. As a result, although the pairs II and III are only driven by a single Zr II / III 1 toothed belt wheel, this variant allows a wrap angle W twice as large.

Taking into account a sufficiently large wrap angle W for the Couples II / III is for the first drive variant preferably only a small number of systems (eg 48 pieces) in question. If the number of systems is higher (eg 72 or 96 pieces), the second variant is preferred.

Below is in the Fig. 12c to 12g the structure of a drafting system group with the gears after Fig. 12a and 12b and their interaction with partition segments 26a explained in more detail. The Fig. 12c shows the drive of the pair I. The timing belt 92 drives the toothed belt ZRI, which sits on the drive shaft 70. The clutch 40 transmits the torque to an intermediate shaft 142 (see also FIG Fig. 6b ) which transmits the moment via the bevel gear stage 68 and a spur gear stage 91a, 91b to the pair I (four pieces). The partition wall 26a intervenes and disconnects the drive from the fiber-guiding parts. The gear box 97 is detachably associated with the partition wall 26a (can be pulled out or pivoted). This arrangement is the same for the two variants.

The Fig. 12d and 12e show the propulsion of the pairs II / I according to the first variant ( Fig. 12a ). The timing belt 95 drives a toothed belt ZR II / III, which sits on the drive shaft 51. The clutch 40 transmits the torque to an intermediate shaft 143, which is part of the pair III. The intermediate shaft 143 is mounted in the insertion part 56.

On the drive shaft 66 sits the spur gear 50, which meshes with the spur gear 52 on the drive shaft 51. The moment M1 is branched here - see also Fig. 11a , The spur gears 50 and 52 have impressed the folding delay. The moment of gear 52 is transmitted via the drive shaft 66 and another clutch 40 to the intermediate shaft 141, which transmits the torque via a bevel gear stage 67 and a spur gear 93a, 93b on the pairs II (four pieces). The partition wall 26a separates the drive from fiber-carrying parts. The insertion part 56 and the gear box 97 (in Fig. 6b also referred to as insertion part 63) are associated with the partition 26a releasably. With this arrangement, four pairs II and two pairs III are detected. The missing two pairs III have a separate drive from the Tangential toothed belt 95 ago - see Fig. 11a and 12a , The structure of this drive is in Fig. 12e shown. To Fig. 12e the drive is performed by a Tangentialzahnriemen 95, which drives the toothed belt ZR II / III. Via the drive shaft 51 and via the coupling 40, the torque is applied to the draw roller 143 (FIG. Fig. 6b ) or the draw roll 88 (FIG. Fig. 10a ). This is stored in the insertion part 56.

The Fig. 12f shows the drive and the storage of the pairs IV. This is for both variants ( Fig. 12a and 12b ) equal. The two pairs IV 1 and IV 2 are stored separately and driven, but otherwise identical. The tangential timing belt 96 drives a timing pulley ZR IV / 1, which sits on the drive shaft 54 and represents the output sub-rollers 165 or the pair IV. The drive shaft 54 is mounted in the bearing 138 which is fixedly connected to the partition wall 26 / 26a ( Fig. 6b ).

The Fig. 12g shows the structure of the drive group II / III for the second variant Fig. 10b / 11b / 12b , It corresponds to the gearbox that is in Fig. 12d is shown. In addition, the spur gear 90a, 90b (see. Fig. 12b ), which divides the moment - M2 in Fig. 11b , The left spur gear 90b of the step 90a, 90b is shown rotated by 90 ° from the drawing plane for reasons of representation, since it is otherwise in the side view according to arrow v ( Fig. 12b ) would not be visible. The whole arrangement shows Fig. 12b in an oblique view. Thus, all pairs II / III (four pieces) are driven by a single timing belt ZR II / III, resulting in a sufficiently large wrap angle.

The exemplary embodiments described show that, according to the invention, the drive units are arranged above and the fiber-guiding draw rolls below the dividing wall 26 or below the respective wall segment 26a. The drive units contain, in particular, the belt pulleys and toothed belt wheels, the drive (tooth) belts resting on them and the drive motors provided therefor or the like 8 and 9 , In contrast, necessary transmission parts such. As the various spur gears 90, 91 and 93 and the bevel gear (eg., 67, 68) depending on convenience above or below the partition and at Requirement may be arranged in a separate gear box (eg 97). It is also understood that the drive shafts (eg 54 in Fig. 6b ) can protrude through the partition 26 or partition segments 26a and then in a lying above the partition wall 26, 26a section the function of a drive shaft, in a lying below the partition wall 26, 26a section, however, have the function of a draw roll or can be provided with areas that the draw rolls form (cf. Fig. 12f ).

Incidentally, it is clear that of the various drafting roller pairs I to IV according to the above description, only the so-called bottom rollers are always driven, while the so-called top rollers by means of pressure arms od. Like. Applied to this and therefore taken by friction of the lower rollers. However, since in the embodiments neither the so-called lower rollers below nor the so-called upper rollers are on top, the lower rollers are preferably referred to as the driving and the upper rollers as the driven stretching rollers.

To drive the drive belt 92, 95 and 96 serve three drive motors 80 accordingly Fig. 8 whose output speeds are chosen so that sets a desired delay between the pairs of rollers I, II or II, III or III, IV. This is in conjunction with the total of ten gear or bevel gears per drafting arrangement ( 10a to 12a ) or twelve gear and bevel gears ( Fig. 10b to 12b ) and due to the fact that they are needed only to drive relatively slowly running draw rolls, which allows the use of inexpensive toothed or bevel gears, created an extremely economical drive unit. For a circular knitting machine with 96 knitting systems 24 such drive units are required. In addition, there is the advantage that with virtually identical components and knitting machines can be operated with eg 72 or 48 knitting systems by the segments 26a are provided with a correspondingly smaller number of draw rolls.

Fig. 13 shows a schematic plan view of the completely composed of segments 26 a or also integral, here annular partition wall 26 with a plurality of pulleys 77, two tension rollers 84, accommodated in a housing 99 drive motors, of which the drive belts 92 and 95 are driven, and the concealed drafting 8 b. Also shows Fig. 13 a variant in so far as the drive belt 96 for the output rollers 65 is applied directly to a pulley 100 opposite him, which in turn accordingly Fig. 8 via a second drive belt, the remaining pulleys of the output rollers in revolutions. Since these are very fast rotating draw rolls, the z. B. driven at speeds of 2000 rpm to 4000 rpm, the pulley 100 is preferably provided with three coaxially superimposed portions, one of which leads the drive belt 96. At the two other sections are two other drive belt 101 and 102, which run over a respective tensioner 103 and 104 and therefore do not abut in the area on some of the pulleys, as in Fig. 8 for the tension roller 84 is shown.

Fig. 14 shows the embodiment according to Fig. 13 but after the fiber-tight mounting of the cover 30 (FIG. Fig. 3 ), whereby the drive units are arranged in a closed space located above the partition 26. In addition, since arranged between the drive units and the drafting rollers gear parts are each arranged in a gear box 97, resulting in a largely maintenance-free operation for the drive units and the gear parts.

Fig. 15 to 21 show an embodiment, which differs from the embodiment according to Fig. 10 and 11 distinguished by differently shaped partition wall segments 26b and the rest of all previously described embodiments in that it has a 5-roller drafting 8c with two superposed tracks for the fiber material.

The partition wall segment 26b after Fig. 15 and 16 is also substantially trapezoidal and in the region of the insertion funnel 43 a, 43 b with a long Outside edge 105 a provided, which lies opposite a shorter inner edge 105 b. A first side edge 105c is provided with a concave recess 106, whereas a second side edge 105d has a convex projection 107. This is shaped so that it fits exactly into the recess 106. Therefore, two or more segments 26b become corresponding Fig. 17 With their side edges arranged side by side, then the projection 107 of any segment 26b respectively lies in the recess 106 of an adjacent segment 26b, so that the segments 26b are analogous to Fig. 10 and 11 can be placed next to each other fiber-like manner of pie pieces to z. B. to form a total annular partition. The approach 107 serves z. B. the purpose, there is a pulley 77 (see. Fig. 16 ).

As Fig. 15 Further, following the insertion funnels 43a, 43b, the drafting arrangement 8c has two superimposed pairs I and II of draw rolls 108 and 109 which follow the draw rolls 61 and 62 Fig. 6 but are arranged vertically rather than horizontally. In addition, two pairs III and IV of drafting organs are present, which, as in Fig. 6 form two superposed Riemchen assemblies 64 with drafting rollers 110 and two superimposed output rollers 65. While rollers 108a, 109a, 65a and strap assemblies 64a are forcibly driven, draw rollers 108b, 109b, 65b and strap assemblies 64b associated therewith are each the driven drafting members.

Between the drafting device pairs II and III, an additional pair V of drafting device elements is provided, which consist of horizontally arranged drafting rollers 111. On the one hand, the ratios are selected so that the rollers 109 and 111 a folding zone in the sense of the folding zone between the draw rolls 62 and Riemchen assemblies 64 after Fig. 6 form by z. B. the initial width of the sliver in the nip line of the rollers 109a, 109b to 16 mm and the distance between the nip lines between the rollers 109a, 109b and 111 is set to about 30 mm, so that there is a W-shaped fold and that the rollers 111 leaving sliver only has a width of about 4 mm. On the other hand, the distance between the nip lines of the rollers 111 and the rollers 110a, 110b of the strap assemblies becomes 64a, 64b with eg about 30 mm compared to the only about 4 mm wide sliver adjusted so large that there is no re-folding.

The embodiment according to Fig. 15 to 21 Above all, has the advantage that only one drive bevel gear is required to drive the drafting rollers 111, since the axes of all other drafting rollers arranged vertically during operation and z. B. via the couplings 75, 76 ( Fig. 5 ) are connected.

Incidentally, the embodiment corresponds to Fig. 15 to 21 essentially according to the embodiments Fig. 1 to 14 why the same reference numerals are used for the same parts. This is especially true for the drive units with the also in Fig. 15 to 21 existing pulleys 77.

Next is in particular from Fig. 15 It can be seen that the driven drafting rollers 108b and 109b are attached to conventional pressure arms 19 (cf. Fig. 2 ) and can be swung aside with these if necessary laterally.

Fig. 18 to 21 Finally, according to the above description, at least the draw rolls of pairs III, IV and V are preferably mounted in withdrawable parts 112 and 113 releasably secured to the segment 26b. In Fig. 18 are all the insertion parts 112, 113 in the inserted operating state. Fig. 19 schematically shows the downwardly pulled-insertion part 112, and Fig. 20 Alternatively, the output rollers 65a, 65b may be fixed to the partition wall segment 26b instead of the insertion part 112, as in FIG Fig. 19 indicated by dashed lines.

As in connection with Fig. 5 has been explained in detail, in the fiber transport direction behind each pair of output rollers preferably each a nozzle 59 is arranged, which also in Fig. 10 and 11 as in Fig. 18 to 21 is indicated. This nozzle 59 can also be designed as a slide-down insert part, which in Fig. 21 is shown in an extended state.

In the case of disturbances such as winding etc., all fiber-guiding functional organs can be cleaned by pulling the respective cassette or by pivoting the respective top rollers (eg 108b). Trained as Riemchenkassette insertion part 112 is designed adjustable in its fine geometry (curtain, turn, position of the turning rail for the straps). The fine geometry changes or has to be adapted if the material properties of the fibers to be processed make this necessary. According to the invention, the procedure is preferably as follows: On a single knitting system, which may be part of the so-called spinning knitting machine or is operated separately, the testing of a specific fine adjustment takes place. If this is determined by tests, then the setting values are transferred to a "teaching". Subsequently, all strappy insertion parts 112 are set outside the circular knitting machine to the determined dimensions and then inserted into this. By this method, a high conversion speed is achieved at the same time perfect uniformity and quality of the distortion process.

The nozzle sticks 59 in particular contain those for spinning with the spinning devices 21 (FIG. Fig. 2 ) required pressure, blowing and suction air ducts. Details of the nozzle block 59 and a preferred air guide are in FIGS. 22 to 24 indicated schematically.

FIGS. 22 and 23 show a nozzle 59, which is attached to the partition 26, in a side view. Two pairs of output rollers 115 arranged one above the other are located below the dividing wall 26. The nozzles or swirling elements 22 (FIG. Fig. 2 ) of the following spinning devices 21 protrude into the interstices of the output roller pairs 115 and communicate with a pneumatic supply 116 (pü) which is effective through the partition wall 26.

There is at each workstation a blown air slot 117 ( Fig. 23 ), which communicates with a blast air source 119 (pb) via a blast air duct 118 projecting through the partition wall 26. From the Blasluftschlitzen 117 exits air, which fibers and fiber particles on the surface of a roller pair 115 so that they can be discharged in associated suction channels 120 and through suction pipes 121, which are connected to a suction source (pu).

The blowing and suction systems have a small distance from the output roller pairs 115. There are ventilation holes 122 present when the blast air flow ejects a smaller amount of air per unit time, as they can be dissipated by the suction channels 120. The blast air ducts and associated Blasluftschlitze 117 and the compressed air supply 116 are parts of the nozzle block 59 and connected thereto. The nozzle 59 is detachably connected to the separating surface 26, in particular Fig. 21 shows.

With the arrangement of Blasluftschlitzen 117, suction channels 120 and ventilation openings 122 it is possible to achieve a sufficient detuning with minimal air volumes per unit time for blowing air and suction air. This increases production reliability. This applies both to arrangements with only one spinning device 21 (FIG. Fig. 22, 23 ) as well as for those with several, consecutively connected spinning devices 21 (FIG. Fig. 24 ).

The invention is not limited to the described embodiments, which can be modified in many ways. This applies in particular to the described pressure arms and insertion parts, which are only examples of which can be deviated in many ways. In particular, the insertion parts may be provided with means not shown in detail to push the driven rollers and straps resiliently or pneumatically against the driving rollers and straps during operation. Especially for further removed from the central axis of the circular knitting functional parts could continue to be provided laterally extendable insertion parts. It is also clear that the functional parts to be serviced and, if necessary, frequently replaced, are preferably mounted on or in the pivotable pressure arms, insertion parts, etc., so that they can easily be exchanged in the opened state. For this purpose, it is recommended, the rollers and deflectors (eg 74 in Fig. 7 ) As far as possible to store only at one end (flying) and arrange their free ends down or side, so that at least the straps deducted after pivoting or pulling out of any trained pressure arms, insertion parts, etc. to the free ends of the driving rollers out can be. Furthermore, the drive and transmission elements described only represent preferred examples. In particular, it is recommended that at least the very fast output rollers (eg 65 in Fig. 6 ) with in the axial direction as short as possible and light drive shafts and pulleys (eg 54, 55 in Fig. 6 ) in order to keep the moving masses small and to allow rapid acceleration and especially braking operations. Instead of toothed belt and toothed pulleys z. As well as chain drives with drive chains and corresponding sprockets and / or other elements are provided, and the spur gears 50, 52, etc., z. B. be replaced by belt drives. The couplings described may be formed differently than shown. For example, horizontally arranged drafting device can be coupled with Schraubradstufen to the drive units. Furthermore, it is clear that the draw rolls are preferably provided with conventional coverings or are produced from conventional materials, it being advantageous if the upper rolls are expediently provided with flexible coverings. Next are suitable for mounting the drafting arrangement and / or the insertion parts on the underside of the partition preferably quick release elements that allow easy handling of a release of the various components. The shapes of the partitions and partition segments can be chosen differently depending on the individual case and of the existing circular knitting machine and adapted specifically to the design of the respective circular knitting machine. Finally, it is understood that the various features may be applied in combinations other than those described and illustrated.

Claims (16)

1. Circular knitting machine for the production of knitwear by at least partly using fibre materials (10, 11), comprising a machine axle (27), a plurality of knitting systems (6) which are disposed distributed about the machine axle (27), drawing equipment (8, 8a, 8b, 8c) which has drawing rollers for supplying the fibre materials (10, 11) at least to some of these knitting systems (6) and drive units (28) which are intended for driving the drawing rollers and which are in operational connection with assigned drawing rollers, a fibre-impermeable separating wall (26) which is disposed transversely relative to the machine axle (27) being provided, the drawing equipment (8, 8a, 8b, 8c) being disposed below and the drive units (28) above this separating wall (26) and the drive units (28) being coupled through the separating wall (26) to the assigned drawing rollers, the separating wall (26) surrounding the machine axle (27) in an annular or conical manner.
2. Circular knitting machine according to claim 1, characterised in that it comprises a base or cam plate (17) and the separating wall (26) is supported by a plurality of support columns (16) which are disposed distributed about the machine axle (27) and supported on the base- or cam plate and/or on the floor.
3. Circular knitting machine according to claim 1 or 2, characterised in that the separating wall (26) comprises a plurality of segments (26a, 26b) which are situated abutting in a fibre-impermeable manner in the circumferential direction.
4. Circular knitting machine according to one of the claims 1 to 3, characterised in that the separating wall (26) is provided on the upper side thereof with an essentially closed cover (30) which surrounds the drive units (28).
5. Circular knitting machine according to claim 4, characterised in that the cover (30) is supplemented by cover elements (31, 32) which protrude in the direction of the machine axle (27).
6. Circular knitting machine according to one of the claims 1 to 5, characterised in that the drawing equipment (8, 8a, 8b, 8c) has respectively a pair of delivery rollers (46, 65) with axles which are disposed in the assembled state parallel to the machine axle (27).
7. Circular knitting machine according to one of the claims 1 to 6, characterised in that suction channels (34c) for fibre discharge and suction channels (34d) for dirt particles are assigned to the drawing equipment (8), and the suction channels (34c, 34d) are connected to a central suction means (34).
8. Circular knitting machine according to one of the claims 1 to 7, characterised in that the drawing equipment (8a, 8b, 8c) is configured as double drawing equipment which is intended for parallel supply of at least respectively two fibre materials (10, 11).
9. Circular knitting machine according to one of the claims 1 to 7, characterised in that it comprises at least one drawing equipment arrangement which has two further pieces of drawing equipment which are situated one above the other and parallel thereto and have available common drive elements (ZRI, ZRII/III 1, ZRII/III 2, ZRIV 1, ZRIV 2), a pre-drawing group (I, II) having horizontal shafts (67) and a main drawing group (III, IV) having shafts (65) which are parallel, in particular vertical, to the machine axle (27).
10. Circular knitting machine according to one of the claims 1 to 9, characterised in that the drawing equipment is disposed at least partially in insertion parts (56, 63, 112, 113) which are connected detachably to the separating wall (26) via couplings (40).
11. Circular knitting machine according to claim 10, characterised in that at least one insertion part (56) is configured as a cross and drawing equipment is situated in four quadrants thereof, the insertion part (56) being disposed pivotably on a further insertion part (63) via a support arm (135).
12. Circular knitting machine according to claim 11, characterised in that at least one piece of drawing equipment (8b) has a first insertion part (63), which is mounted pivotably directly on the separating wall (26) via a support arm (132) and a first pivot point (131), and a second insertion part (56), which is connected pivotably to the first insertion part (63) via a support arm (135) and a second pivot point (134), the second pivot point (134) being disposed on a front, lower corner of the first insertion part (63).
13. Circular knitting machine according to one of the claims 1 to 12, characterised in that the drive units (28) are configured as tangential belt drives and at least one drive unit for delivery rollers (46, 65) of the drawing equipment (8) comprises at least one first and one second drive belt (78, 83) and also a plurality of drive elements which are disposed distributed about the machine axle (27) in the form of pulleys (77, 81) which have first and second portions (77a, 77b) which are situated at least partially one above the other, the first drive belt (78) tangentially surrounding the first portions (77a) of a first part of the pulleys (77) and the second drive belt (83) tangentially surrounding the second portions (77b) of a second part of the pulleys (77, 81).
14. Circular knitting machine according to claim 13, characterised in that the first drive belt (78) surrounds a drive pulley (79) of a drive motor (80) and the second drive belt (83) also surrounds a tensioning roller (84) respectively tangentially and without reverse bending.
15. Circular knitting machine according to claim 13 or 14, characterised in that at least some of the pulleys (77, 81) are assigned an auxiliary roller (85) for the first and/or second drive belt (78, 83), the auxiliary roller (85) being disposed at the starting point of the relevant drive belt (78, 83) or at a small distance in front.
16. Circular knitting machine according to one of the claims 1 to 15, characterised in that, in a transport direction of the fibre material behind delivery rollers (115) of the drawing equipment, respectively a nozzle connection (59) with a blowing and suction system is mounted on the separating wall (26) and comprises blowing and suction openings (117, 122) which are assigned to the delivery roller pairs (115).

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