EP0351722A1 - Fadenliefervorrichtung für Textilmaschinen - Google Patents

Fadenliefervorrichtung für Textilmaschinen Download PDF

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Publication number
EP0351722A1
EP0351722A1 EP89112902A EP89112902A EP0351722A1 EP 0351722 A1 EP0351722 A1 EP 0351722A1 EP 89112902 A EP89112902 A EP 89112902A EP 89112902 A EP89112902 A EP 89112902A EP 0351722 A1 EP0351722 A1 EP 0351722A1
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EP
European Patent Office
Prior art keywords
thread
thread delivery
flexible shaft
delivery device
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP89112902A
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German (de)
English (en)
French (fr)
Inventor
Gustav Memminger
Falk Kühn
Heinz Fabschitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0351722A1 publication Critical patent/EP0351722A1/de
Ceased legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/94—Driving-gear not otherwise provided for

Definitions

  • the invention relates to a thread delivery device for textile machines, in particular circular knitting or circular knitting machines, with at least one thread-conveying, rotatably mounted thread delivery element on its circumference, which is connected via a ring-shaped shaft train to a drive source that rotates it.
  • each of these thread delivery devices is designed with a holder which is set up for fastening to a support ring of the machine and on which a thread delivery element in the form of a thread wheel or a thread drum is rotatably mounted about a vertical axis.
  • All of the thread delivery elements of the circular knitting machine are driven together by one in a horizontal plane arranged, rotating, endless flat or toothed belt, which in each thread delivery device is in engagement with a pulley coupled coaxially with its thread delivery element and which in turn is driven via a so-called quality wheel of variable diameter in fixed dependence on the rotary movement of the needle cylinder.
  • Typical examples of this are described in DE-PS 1286 680 and DE-PS 24 61 746.
  • thread diversion points are basically required in order to first deflect the thread coming from above into the horizontal and feed it to the thread delivery element that conveys the thread, as well as to direct the conveyed thread running from the thread delivery element onto a thread path which brings it to the respective knitting point.
  • Such thread deflection points result in increased thread friction which, depending on the thread quality and moisture content of the thread, is too strong Abrasion and thus leads to fluff formation.
  • blow-off devices In order to counteract undesirable fluff deposits, which can quickly lead to an impairment of the running of the thread, continuously operated blow-off devices are required which, the greater the amount of fluff, the greater the effort.
  • the diameter and the position of the endless drive belt which is in engagement with all of these pulleys are also specified in a circular knitting machine. Because the thread delivery devices are fastened with their holders projecting radially outward on the common support ring, the diameter of the circular drive belt track can in principle not be smaller than the diameter of the support ring. However, this is often undesirable with regard to the thread guide because, for example, when the threads are fed from a creel (side creel) set up next to the machine, the pipelines carrying the individual threads run inside the support ring and must therefore be loosened when the belt is changed.
  • the state of the art now also includes a whole series of different thread delivery devices which work with a driven thread delivery element rotating in the operating position about a horizontal axis of rotation.
  • An example of this is DE-AS 1785 501, which describes a yarn delivery device whose yarn delivery element, which is rotatably mounted on a holder, is coupled to an associated pulley via a clutch with variable slip.
  • Such thread delivery devices result in a cheaper thread run with fewer thread deflection points; However, they have not been able to assert themselves in practice because the drive of their thread delivery elements is not simple and reliable enough.
  • thread delivery devices in which the thread on the circumference of the rotating, driven thread delivery element is conveyed either by the thread being pressed by the drive belt against a region of the circumferential surface of the thread delivery element (belt feeder), or with the formation of a storage roll in a plurality of turns is placed on the delivery element, there are also thread delivery devices, in particular for elastic threads, in which the thread is unwound directly from the bobbin.
  • thread delivery devices as they are typically described in DE-PS 32 33 869, are constructed in such a way that they have at least one driven drive roller rotatably mounted in a holder as a thread delivery element, the circumference of which is frictionally engaged with at least one bobbin to be unwound , which is usually pressed against this drive roller by its own weight.
  • the drive rollers can in turn be driven by an endless drive belt common to a thread delivery device, which is arranged circumferentially in a horizontal plane (DE-PS 32 33 869), but it is also known (US-PS 3303 671), a circular knitting machine two each to assign a plurality of long drive rollers which are arranged next to one another and which are arranged parallel to one another on opposite machine sides and each coupled via a flexible shaft to a common drive gear.
  • This arrangement results in very different thread running ratios to the individual knitting points and also has the disadvantage that the necessarily relatively long flexible shafts, one of which must also be guided over the needle cylinder, are not supported, tend to beat and impair the thread flow.
  • the invention has for its object to provide a thread delivery device, in particular for circular knitting machines, which is characterized by a particularly simple, reliable and easy to assemble structure and also an ideal thread run from the bobbin or the thread source to the thread consumption point guaranteed without being hampered by an inevitable dependence on the location or design or arrangement of the drive source.
  • the thread delivery device mentioned at the outset is characterized according to the invention in that the annular shaft train has at least one flexible shaft which is supported at fixed intervals at bearing points and onto which the thread delivery element or a drive element connected to it is placed.
  • This design results in a particularly simple, fail-safe construction of the entire thread delivery device, with extensive adaptation to the particular circumstances of the individual application being possible.
  • the device can be constructed with relatively few components with a long service life and is therefore very inexpensive. It works quietly. At the same time, it allows a virtually arbitrary arrangement of the thread delivery elements according to an optimal thread travel, while there is largely freedom in the choice of the drive source.
  • the flexible shaft When used for a circular knitting machine, the flexible shaft is advantageously arranged on a circular arc coaxial to the axis of the needle cylinder and is supported at intervals at bearing points against the machine frame. In contrast to the situation with a rotating, endless drive belt used for the drive, this results in a much simpler and clearer drive, in which malfunctions are almost impossible.
  • a flexible shaft is almost wear-free, so that the drive has an almost unlimited life compared to a belt drive. Pollution problems that lead to malfunctions do not occur; Longer exposed pieces of the flexible shaft can be covered effortlessly by the protective hoses known from such flexible shafts, which, by the way, also increases the risk of accidents is reduced to a minimum. In the event of a repair, the flexible shaft need only be separated from the respective drive or thread delivery element, for example, to be removed.
  • the flexible shaft itself is formed in one piece in the simplest case, but embodiments with a multi-piece design of the flexible shaft with connecting means arranged between its sections are also conceivable, as can also be advantageous if the flexible shaft is prestressed in itself.
  • the at least one thread delivery element is mounted in a rotationally fixed manner directly on the flexible shaft itself or on a drive element, for example a cylindrical sleeve or sleeve, placed directly on it.
  • a drive element for example a cylindrical sleeve or sleeve, placed directly on it.
  • the thread delivery element can also be connected in a geared manner to the drive element.
  • the thread delivery element is rotatably mounted on the flexible shaft or on the drive element placed thereon and can optionally be coupled to the flexible shaft by means of associated coupling means.
  • These coupling means make it possible to temporarily loosen the rotary connection to the flexible shaft, for example for set-up work or for winding the necessary storage reel onto a thread wheel working with an automatic axial storage reel feed.
  • the arrangement can, if necessary, also be made in such a way that the coupling means are designed to be self-switching and cause them to be actuated Control device is assigned, which is located at a suitable location away from the flexible shaft and is connected to the coupling means, for example via an electrical line.
  • the coupling means can be actuated independently of the rotary movement of the flexible shaft, the thread delivery can be switched on or off at the corresponding knitting point, as is required, for example, in the case of knitting machines working with a striping apparatus.
  • At least one yarn delivery element In order to improve the assembly and disassembly conditions, in particular in the case of a yarn delivery device with a plurality of yarn delivery elements arranged on a common flexible shaft, it can be advantageous for at least one yarn delivery element to have separable bearing means with which it can be placed on the flexible shaft or on a drive element placed thereon is put on. This eliminates the need to disassemble the entire flexible shaft when replacing a thread delivery element.
  • the arrangement is generally such that at least one thread delivery element is designed as a thread wheel or drum, on the circumference of which the thread is in the form of Windings rests and are assigned to the thread guide element (s) through which the thread can be introduced or removed essentially tangentially.
  • thread wheels or drums are stored horizontally; they serve as a supply store for a thread reserve.
  • this thread The delivery device also has at least one thread delivery element as a drive roller that frictionally drives an attached bobbin on its circumference, which is coupled to a flexible shaft running through a coaxial cavity defined by it and / or parallel at a distance next to it, for example over the length of the drive roller is just led.
  • This design of the thread delivery device is particularly suitable for threads that are elastomeric and difficult to process and that can be removed from the bobbin.
  • a particularly simple construction of this thread delivery device can be achieved in that the tubular drive roller fastened directly on the flexible shaft is mounted on a holder on both sides thereof.
  • the yarn delivery device has a plurality of flexible shafts running in parallel, each with its own associated yarn delivery or drive elements, which come from corresponding drive sources with different speeds are driven.
  • thread delivery elements are provided which, either separately for themselves or rotatably supported on one of the flexible shafts, can optionally be coupled to one or another flexible shaft of different speeds.
  • a thread delivery element or several thread delivery elements is or are part or parts of a thread delivery unit, which are at least one bearing point for at least one flexible shaft exhibit.
  • This thread delivery unit can then expediently also have its own thread guide elements and / or devices monitoring and / or influencing the thread run. These include, for example, inlet eyelet holders, knot catchers, thread brakes, inlet and outlet stops, error indicator lamps, each with the appropriate electrical contact.
  • each of these thread delivery units can advantageously have its own holder with fastening devices, to which at least the thread delivery element or elements e) is or are stored.
  • fastening devices are known per se in yarn delivery devices; they are all formed like clips or hooks with an associated clamping screw, they have a groove-like recess with which they can be placed on the support ring and in the area of which electrical connection contacts are arranged, which come into contact with an electrical ring line arranged on the support ring during assembly come.
  • the flexible shaft (s) can be mounted and supported directly on each of these thread delivery units, so that additional support and bearing parts are not necessary.
  • the thread delivery device can also be designed such that the support and bearing elements for the flexible shaft (s) have their own bearing arms, which carry fastening means of the type mentioned for mounting on a stationary support ring, for example a textile machine. In this way, an additional support of the flexible shaft, which is independent of the machine-related arrangement of the thread delivery elements, is possible, which is entirely dependent on the storage requirements for the flexible shaft or the flexible shafts.
  • the support and bearing elements for the flexible shaft (s), which are optionally also provided on the holders of the thread delivery units mentioned, can advantageously have their own bearing means, which receive the respective flexible shaft and form bearing points, for example in the form of bearing shells, sliding and rolling bearings.
  • Very simple assembly conditions result if the support and bearing parts are formed in two parts, at least in the region of the flexible shaft (s), ie their support or bearing points.
  • each thread delivery element is arranged directly on its associated flexible shaft, which forms part of the bearing device for the thread delivery element.
  • the flexible shaft (s) is or are coupled via at least one drive element to the associated thread delivery element (s) via gear means, for example by tooth or Friction gear, belt transmission and the like. can be formed.
  • gear means for example by tooth or Friction gear, belt transmission and the like.
  • one or more thread delivery element (s) can be combined into a separate thread delivery unit, which has the holder already mentioned, which is set up, for example, for attachment to the support ring of a circular knitting machine.
  • the gear means can also be designed to be infinitely variable or switchable.
  • the yarn delivery device can also be designed such that at least actuating means are assigned to a yarn delivery element, by means of which the amount of yarn conveyed per unit of time can be changed individually within a predetermined adjustment range independently of the rotational speed of the flexible shaft.
  • adjusting means can have, for example, a device for changing the effective outer diameter of the thread delivery element, at least in its thread support area.
  • the actuating means can also contain gear means with variable transmission ratios, which just allow the speed of the thread delivery element to be selected independently of the drive speed of the assigned flexible shaft. In any case, however, it is generally advantageous if the adjusting means are designed to be controllable while the thread supply element is running, which also applies to the coupling means which may be present between the respective thread supply element and / or drive element and its associated flexible shaft.
  • the new thread delivery device is not only distinguished by an impressive simplicity of construction, but also by great adaptability to the respective conditions of the intended use. It is by no means round in its use knitting machines limited, but can be used with advantage wherever it is important to deliver one or more threads precisely, without having to put up with restrictions in terms of the arrangement or accommodation of the drive source or in terms of the space required as a result.
  • the thread delivery device can also easily be assigned to a side or round creel which is set up next to a thread-consuming textile machine, it being conceivable to drive the textile machine by means of the or an additional flexible shaft in order to achieve the required synchronization .
  • the circular knitting machine shown only schematically in FIGS. 1, 2 has a machine frame 1, the frame feet of which are designated by 2 and carry a frame ring 3, on which side supports 4, which are arranged all around, are screwed, on which a second frame ring 5 is used 6 schematically indicated revolving needle cylinder supports, the associated lock jacket is designated by 7.
  • the needle cylinder is driven by a drive unit indicated at 8; 9 denotes the drive of a dial 10 assigned to the needle cylinder 6.
  • a spool frame 12 is arranged on the side supports 11 carrying the dial 9, which has vertical support tubes 13 and a spool support ring 14 fastened thereon, on which thread spools indicated at 15 are mounted.
  • a coaxial support ring 16 of a thread delivery device is mounted on the side supports below the bobbin support ring 14 and has a number of thread delivery units 17 corresponding to the number of knitting points of the circular knitting machine distributed over its circumference at uniform intervals, the construction of which is described in detail in one embodiment with reference to FIG. 3 to 6 will be explained below.
  • Each of these thread delivery units 17 has a thread delivery element in the form of a thread wheel 20 which is rotatably mounted on a holder 18 fastened to the support ring 16 via a flexible shaft 19 with a horizontal axis of rotation.
  • the thread wheels 20 of the individual thread delivery units 17 arranged side by side - of which only a few are shown in FIG.
  • the flexible shaft 19 is connected at both ends to corresponding output shafts 21 (FIG. 10) of a continuously variable transmission 22, which is positively coupled to the dial drive 9 via an input shaft designated in FIG. 10 and is therefore inevitably synchronized with the drive of the circular knitting machine.
  • a control element 24 of the transmission 22 allows any sensitive adjustment of the output speed.
  • a very simple thread path 25 results from the respective spool 15 to the corresponding knitting point, in the area the thread delivery unit 17 does not deflect the thread into a horizontal plane required are.
  • the thread travel path 25 leads from the respective thread spool 15 via deflecting bolts 28 seated on a corresponding ring 26 of the bobbin frame 12, from where it is guided tangentially to the respective thread wheel 20 via corresponding thread guide members, which promotes the thread positively and from which the thread also does runs tangentially in order to finally reach the knitting point via further thread guiding and monitoring elements.
  • each thread delivery unit 17 which is designed as a support or bearing arm, is provided at one end with a fastening device 27 in the form of an open-edged, transverse groove, with which it is placed on the support ring 16 so as to project radially outwards and into which a clamping screw 280, which fixes the holder 18 in a stationary manner, projects.
  • the electrical connection of the storage mechanisms as well as the power supply to the fault indicator lamp takes place via an electrical strand 33, which is laid along the support ring 16 and which is known in the assembly of the holder 18 is contacted via contact pins 34.
  • the housing 29 fastened to the holder 18 completely separates the electrical elements of the thread delivery unit 17 from the mechanical parts that convey the thread.
  • a thread inlet eyelet 35 is arranged on the housing 29 at the top and a plate thread brake 36 is arranged on the housing front on the thread path between the thread inlet eyelet 35 and the thread wheel 20.
  • two thread outlet eyelets 37, 38 are provided below the thread wheel 20, which are arranged at a distance from one another and between which the sensor arm 32 of the outlet stopper scans the thread.
  • the holder 18 has a tab 39 which projects horizontally over the housing 29 and is screwed on at the side at 41 (FIG. 4) and serves as a support arm or bearing support for the flexible shaft 19.
  • this bearing support 39 can also be placed on the support ring 16 independently of the housing 29 - provided with a corresponding fastening device 27 - as is illustrated at one point in FIG. 2, in order thereby to allow the flexible shaft 19, if necessary, support in the area between adjacent yarn delivery units 17 so that, in particular, it cannot swing up.
  • Each of the support arms 39 is formed in two parts in the region of the flexible shaft 19, one lower part 42 carries an upwardly open, transverse bearing half-shell 43, which is supplemented by a corresponding bearing half-shell 43 of an attached upper part 44 in the assembled state to form a closed bearing shell for the flexible shaft 19.
  • the two parts 42, 44 are connected to one another by screws indicated at 45 (FIG. 4).
  • the flexible shaft 19 can be mounted directly in the two half-shells 43, which may consist of a suitable material. However, it is also conceivable to place own bearing elements, for example roller bearing bushes or slide bearing bushes etc. on the flexible shaft, as is indicated by dashed lines in FIG. 4 at 46 in order to improve the bearing conditions if necessary. Such roller or slide bearings 46 are then received in corresponding half-shell recesses in the two parts 42, 44.
  • the described two-part design of the support arms 39 means that installation is considerably easier. First of all, it is only necessary to fasten the holders 18 and, if appropriate, the support arms 39 to the support ring 16 at a predetermined distance, whereupon with the parts 44 removed, the flexible shaft 19 carrying the thread wheels 20 is inserted and the parts 42, 44 are screwed together.
  • the flexible shaft 19 forms part of the bearing device of each thread wheel 20, regardless of where the flexible shaft 19 is supported.
  • the flexible shaft 19 is expediently surrounded by a known flexible, hose-like shaft guide sleeve 47, which in turn can serve as a bearing element for the flexible shaft in the manner shown in FIG. 6.
  • a known flexible, hose-like shaft guide sleeve 47 which in turn can serve as a bearing element for the flexible shaft in the manner shown in FIG. 6.
  • it can namely be clamped at the end in each case between the half-shells 43 of the associated support arm 39.
  • the thread wheels 20 of the different thread supply units 17 forming the thread delivery elements are detachably coupled to the flexible shaft 19 in order to have the possibility, for example when setting up the machine etc., of turning a single thread wheel 20 by hand or driving it through the thread running over it.
  • An associated clutch mechanism is illustrated in a simple embodiment in FIGS. 7 to 9.
  • Each thread wheel 20 consists essentially of one cylindrical hub 48, which carries essentially U-shaped wire brackets 49 which are distributed around the circumference at equal angular intervals and which are inserted with their leg ends into corresponding ring flanges 50 of the hub 48.
  • the brackets 49 of which six are provided in the thread wheel 20 shown in FIG. 9, for example, each have a substantially axially parallel thread support area 51, on which there is an oblique to the axis of rotation and blunt with the thread support area 51 on one side Angle-enclosing thread run-up area 52 connects, while on the other side the thread support area 51 merges into a thread run-out area 530 of smaller radial length that is inclined outwards.
  • the thread 25 coming from the inlet eyelet 35 via a knot catcher 40 (FIG. 3) runs onto the run-on bevels 52 of the brackets 49; the thread windings formed there are automatically pushed side by side onto the thread support area 51 because of the bevel.
  • the thread running off is continuously drawn off tangentially via the run-out slope 530 from the thread winding which is continuously axially advanced there.
  • thread wheel 20 has proven to be particularly useful for thread delivery. Basically, there are no restrictions with regard to the design of the thread wheels or drums in the thread delivery device, ie in general the thread delivery elements. They only have to be such that they can be driven by the flexible shaft 19. A further embodiment of a thread wheel 20a is shown in FIGS. 13 to 17.
  • a cylindrical tube piece 520 is inserted in two continuous, aligned, axially parallel bores, in which an axially parallel coupling pin 53 is axially displaceably mounted, which is loaded by an attached compression spring 54 to an engagement position, in which a locking bolt 55 arranged on the end face engages in a corresponding associated bore 56 of a coupling part.
  • This coupling part is formed by an annular flange 57 of a non-rotatably mounted cylindrical sleeve 58 on which the thread wheel 20 with its hub 48 is freely rotatable and axially immovable and which thus forms a drive element.
  • a plurality of bores 56 are arranged, which are all around at equal intervals on a bolt circle (FIG. 9), such that the thread wheel 20 can be connected in a rotationally fixed manner to the flexible shaft 19 in any angular position given by the hole division.
  • the coupling pin 53 is provided with a latching device 59, which is supported against the pipe piece 520 and can be latched with the coupling pin 53 in the retracted position.
  • the coupling can thus be locked in the released state; by simply turning the coupling bolt 53, the coupling can be engaged in the manner described.
  • FIGS. 11, 12 There may be cases in which, for better clarity and accessibility, it is expedient not to arrange at least some of the thread wheels 20 directly on a flexible shaft 19 in the manner explained, but to store them separately from the flexible shaft.
  • FIGS. 11, 12 Such an embodiment is shown in FIGS. 11, 12:
  • the basic structure of the thread delivery unit illustrated in these figures is the same as that of the thread delivery units 17; The same parts are therefore provided with the same reference symbols and are not explained again.
  • the thread wheel 20 provided with the coupling already described is rotatably supported by means of its own axis 60 on the support arm 39, which in turn is formed in two parts in the region of the bearing and support point for the flexible shaft 19, in order to assemble the flexible shaft 19 facilitate.
  • a drive pulley 61 is rotatably mounted as a drive element, which is coupled via an endless toothed belt 62 to a corresponding toothed pulley 63 rotatably mounted on the axis 60, which in turn takes the place of the ring flange explained with reference to FIG 57 occurs.
  • toothed belt drive 61 to 63 a toothed gear or another gear connection could also be used, as the embodiments described below (FIGS. 14 to 17) show.
  • FIGS. 13 to 17 embodiments of the thread delivery device which have been modified compared to the thread delivery device described are described to the extent that they allow working with different thread delivery speeds.
  • FIG. 13 also provides two additional flexible shafts 19a, 19b, which are arranged in a circular manner parallel to the already explained flexible shaft 19 and coupled with its own gear 22 (FIG. 10), which is not shown in FIG. 13 are.
  • the flexible shafts 19, 19a, 19b are arranged in parallel in the present case one above the other; Applications are also conceivable in which they are mounted running radially next to one another or are in a different association with one another.
  • Each of the flexible shafts 19, 19a, 19b carries in the manner already described drive pulleys 61 assigned to the individual knitting points, which in turn are coupled non-rotatably to the flexible shafts or by the flexible shafts via the coupling (FIGS. 7 to 9) already described Waves can be solved. If more than three different yarn speeds are required, more than three flexible shafts can also be arranged accordingly.
  • the thread delivery unit 17 in this case has an essentially flat bearing plate 64 which is integrally formed on the holder 18 and on which a thread wheel 20a is rotatably mounted via a roller bearing 65 and the axis 60 in the manner shown in FIG.
  • the thread wheel 20a has a thread support area 51 designed as a closed, all-round surface which is laterally followed by an oblique thread run-up area 52 and a thread run-out area 530, so that there is a profile shape which is fundamentally similar to that in FIG. 7 (FIG. 15).
  • the flexible shafts 19, 19a, 19b are mounted on the bearing plate 64 via roller bearings 65 (FIG. 15).
  • the same parts are provided with the same reference numerals, so that a further explanation is not necessary.
  • the toothed belt pulley 63 is connected in a rotationally fixed manner to the thread wheel 20a.
  • One of the couplings assigned to the flexible shafts 19, 19a, 19b is inserted by means of the coupling pin 53.
  • the thread wheel 20a is driven with the assigned speed of the respective flexible shaft 19a or 19b.
  • the thread delivery unit is designed, as in FIG. 13, with a ribbed carrier plate 64 in the form of a housing and a holder 18 which is integrally connected to it.
  • a ribbed carrier plate 64 in the form of a housing and a holder 18 which is integrally connected to it.
  • two flexible shafts 19, 19a are rotatably mounted in the carrier plate 64 via roller bearings 66 (FIG. 15).
  • the two flexible shafts 19, 19a are driven at different speeds by drive sources (not shown).
  • Two gearwheels 67, 67a are provided as drive elements, which are supported with a hub part 68 in the inner ring of the roller bearings 66 and for their rotationally fixed connection to the flexible shaft 19 or 19a, a coupling ring 69 is used, which fits into a corresponding one Carries threaded bore screwed clamping screw 70 which protrudes through an associated hole in the hub part 68 and is optionally supported by a protective sleeve made of brass or aluminum against the flexible shaft 19 or 19a.
  • the two gears 67, 67a of the same diameter lie with their axes on an imaginary circular arc around the axis 60 mounted on the carrier plate 64 via the roller bearing 65.
  • a shift lever 72 is pivotably mounted on a bearing hub 71 of the carrier plate 64 which is concentric with the axis 60, which is axially secured by a snap ring and on one end has an actuating part 73 which projects laterally over the carrier plate 64 and on the other end carries a rotatably mounted intermediate gear 74 which can be brought into engagement with the gear 67 or the gear 67a as desired (see FIG. 14) .
  • the intermediate gear 74 is in permanent engagement with a toothed disk 75 placed on the axle 60, which in turn can be coupled in a rotationally fixed manner via a locking pin 76 to the coaxial thread gear 20a rotatably mounted on the axle 60.
  • the locking bolt 76 which is axially parallel in the thread wheel 20a and is longitudinally displaceable against the action of a compression spring 77, engages in the engaged position in a corresponding bore 78 of the toothed disk 75.
  • the thread wheel 20a is axially displaceable on the axis 60 between the operating position shown in FIG. 15, in which it is non-rotatably coupled to the toothed disk 75 via the locking bolt 76, and a decoupled position, in which it is on the axis 60, for example for setting purposes , can be rotated freely.
  • These two axial positions of the thread wheel 20a are determined by a spring-loaded catch 79 arranged on the hub of the thread wheel 20, which can optionally snap into one of two catch grooves 80 on the circumference of the axis 60.
  • the drive of the thread wheel 20a can thus be switched on either from the flexible shaft 19 or the flexible shaft 19a.
  • the thread wheel 20a which is in the disengaged position, to the toothed disk 75 again, it only needs to be pushed axially back into the operating position according to FIG. 15;
  • the locking pin 76 which is initially pushed back, then automatically finds its way into the bore 78 due to the rotational movement of the toothed disk 75, whereby the rotationally fixed coupling between the thread wheel 20a and the toothed disk 75 is produced.
  • FIGS. 16, 17 differs from that according to FIGS. 14, 15 essentially only in that the carrier plate is formed in two parts. 14, 15, the two flexible shafts 19, 19a with their axes are rotatably supported one above the other in a common vertical plane. They again carry the spur-toothed drive gears 67, 67a, which are non-rotatably attached and form the drive elements.
  • first carrier plate part 64a there is a second carrier plate part 64b in one of those mentioned, which contains the axes of the two gear wheels 67, 67a Plane parallel direction slidably mounted on a dovetail groove guide 81 between the two positions shown in FIGS. 16, 17. 15, the carrier plate part 64b carries the rotatably mounted axis 60, on which in turn the thread wheel 20a and the toothed disk 75 are mounted in the manner already described.
  • the arrangement is such that, in each of the two operating positions (FIGS. 16, 17), the toothed disk 75 is in engagement with one of the two drive gears 67 or 67a, the corresponding position being provided by a ball catch device (not shown) in the area of the dovetail guide device 81 is determined.
  • This embodiment is characterized by a particularly simple construction of the switching mechanism between the two speeds. You could of course also work with three or more flexible shafts 19, 19a etc. and associated drive gears 67, 67a etc., which are then each to be arranged with their axes lying in a common vertical plane.
  • FIGS. 18 to 21 There are a number of applications for circular knitting machines where it is important to be able to work with different thread speeds (usually up to four in practice). Apart from the described possibility of assigning a separate flexible shaft with a corresponding drive source to each thread running speed, it is also possible to achieve different thread running speeds at individual consumption points by using appropriate adjusting means on the associated thread wheels or thread supply elements in general individual intervention. Examples of this are shown in FIGS. 18 to 21:
  • thread wheels shown in these figures basically correspond in their construction to the already explained embodiment of the thread wheel 20, so that the same or corresponding elements are provided with the same reference numerals and are not explained again.
  • the arrangement is made such that the thread wheels are variable in their effective diameter, in such a way that they can be adjusted to the respective thread running speed in a setting range of, for example, 1: 3: 5.
  • the U-shaped wire brackets 49 are guided on the ring flange 57 of the cylindrical bushing 58, which is non-rotatably mounted on the flexible shaft 19, in pivot bushings 83 with their two parallel legs 49a, the pivot bushings 83 in each case pivot axes 84 parallel to the axis of rotation are pivotable.
  • the bracket legs 49a are supported against the hub 48 via end parts 85 bent at right angles, but the ring flanges 50 of which are provided with receiving bores 88.
  • the hub 48 is rotatably mounted on the bushing 58 and connected to it in a rotationally fixed manner by a clamping ring 89 screwed onto the bushing 58 at the end.
  • the U-shaped brackets 49 are arranged lying in secant planes to the axis of rotation of the hub 48.
  • the brackets 49 which are displaceably guided in the swivel sleeves 83 with their bracket legs 49a, are aligned more or less radially, with the result that their thread support areas 51 come to lie on a larger or smaller common flight circle.
  • the hub 48 can also be connected to the bushing 58 via a releasable coupling in the manner already explained, in order to be able to uncouple the thread wheel from the flexible shaft 19 and to be able to couple with it.
  • FIG. 21 Another possibility of continuously changing the thread delivery speed at constant speed of the flexible shaft 19 is shown in FIG. 21.
  • the effective outer diameter of the thread support areas of the U-shaped bracket 49 in profile-like thread wheel is kept constant, but the actual thread wheel is coupled to the flexible shaft 19 via its own continuously variable friction gear, which allows the speed of the thread wheel itself to be arbitrarily change:
  • a circular annular disk 91 is rigidly fixed in a vertically oriented manner, in the bore of which an adjusting wheel 93 coaxial with the flexible shaft 19 is rotatably mounted by means of a cylindrical extension which is attached to its cylindrical end face Approach carries a bevel gear 94 mounted in a rotationally fixed manner.
  • the main bearing point is in a coaxial housing 97, which is fixed via fastening arms 97 'with the washer 91.
  • a scale ring 96 is rotatably mounted on the adjusting wheel 93 and can be fixed by a fastening screw 970.
  • axle pins 98 are fixedly connected to the housing 97 and preferably each enclose an angle of 120 ° with one another.
  • a hollow spindle 99 is rotatably mounted, which is rotatably connected at the end to a bevel gear 100 which is in engagement with the bevel gear 94 and which is in engagement with a spindle nut 101 on which a friction wheel 103 is rotatably mounted via a ball bearing 102 , which is equipped with a friction lining 104, which cooperates with a thrust washer 113.
  • a bearing disk 105 is axially secured on each axle pin 98, on which a conical ring gear 107 can be rotated coaxially to the friction wheel 103 via a ball bearing 106 is mounted, which is coupled to it in a rotationally fixed manner via parallel pins 108 anchored in it at the ends, which engage in corresponding through holes of larger diameter of the friction wheel 103.
  • a locking pin 110 anchored in the housing 97 secures the bearing disk 105 against rotation.
  • the bevel gear rings 107 assigned to the three axle pins in the manner described are in engagement with a common ring gear 111, which is rotatably supported via a ball bearing 112 with an axis parallel to the axis of rotation of the flexible shaft 19 on a corresponding bearing projection of the pressure disk 113 designed as an annular disk.
  • the thrust washer 113 is in turn supported by splines and an annular flange 114 on a cylindrical shoulder of the bush 95 in a rotationally fixed and axially displaceable manner.
  • a bearing ring 116 is rotatably mounted on the thrust washer 113 via a ball bearing 115 with an axis parallel to the axis of rotation, on which either bracket 49 or in this case a sheet metal or plastic body of revolution shaped in accordance with the shape of the bracket 49 of FIG. 7 490 is fastened on one side in a rotationally fixed manner, which carries the thread support region 51 and the oblique thread run-up region 52 and which carries the oblique thread outlet region 530 (FIG. 7) with the effect already described.
  • a catch 117 arranged laterally on the rotating body 490 can engage by means of corresponding axial actuation with a locking pin 118 in a corresponding hole 119 of a ring of holes of constant pitch on the ring gear 111 and thus produce a rotationally fixed coupling between the rotating body 490 forming the actual thread wheel and the ring gear 111 .
  • An adjusting ring 120 screwed onto the cylindrical extension of the bushing 95 allows the thrust washer 113 to be axially loaded towards the friction wheels 103 by means of disk spring assemblies 121, 122 and the ring flange 114 arranged between them.
  • the flexible shaft 19 takes along the bush 95 and thus also the thrust washer 113, which in turn drives the friction wheels 103.
  • the radial position of the friction wheels 103 corresponds to the respective setting; the friction wheels 103 rotate about their axis pins 98 at a speed corresponding to their radial distance from the axis of rotation. Because of the rotationally fixed coupling at 108, the bevel gear rings 107 are therefore also taken along at the same speed with respect to the axle pins 98, which in turn now drive the ring gear 111 and thus the rotary body 490 at the corresponding speed.
  • thread delivery units 17a are arranged on the support ring 16 of the circular knitting machine according to FIG. 1, each of which has an essentially frame-shaped holder 180 with two parallel bearing arms 39a, which are held at a distance by cross members 131.
  • Each of the bearing arms 39a is provided with a fastening device 27 in accordance with FIG. 3 and for the storage and support of two flexible weles arranged next to one another and running parallel to one another len 19, 19a set up, which are driven at the same speed and in the same direction.
  • the two flexible shafts 19, 19a extend, like FIG. 2, in a circle around the circumference of the machine and are connected at the end to the continuously variable transmission 22.
  • thread delivery elements 200 On the flexible shafts 19, 19a, two pieces of pipe are rotatably mounted as thread delivery elements 200, which are aligned parallel to each other at a distance between the two support arms 39a and at the same time form the drive rollers for the bobbin 130.
  • the axial length of these thread delivery elements 200 is somewhat larger than that of a bobbin 130; Limiting stops 132 formed on the bearing arms 39a prevent the bobbin 130 from being unintentionally released from the holder 180.
  • the two bearing arms 39a are again formed in two parts in the region of the two flexible shafts 19, 19a in accordance with FIG. 4.
  • the upper part containing a half shell 43 is designated 44.
  • the flexible shafts 19, 19a can either be mounted directly in the lower half-shells 43, or - as indicated - their own bearing bushes or roller bearings 46 can also be placed on the flexible shafts in the area of their bearing points.
  • both flexible shafts 19, 19a are driven by separate gears. However, this is not absolutely necessary. Modifications of the described embodiment are also conceivable to the extent that only one driven flexible shaft 19 is present and dispenses with a drive of the other drive roller, or this from the bend same shaft is derived by its own small belt drive or a gear connection. In this case, the second flexible shaft 19a can then optionally be dispensed with; In place of the pipe section 200 is a roller rotatably mounted in the two bearing arms 39a.
  • one or both flexible shaft (s) 19, 19a can also be driven by a further flexible shaft, which in turn is coupled to the drive source and is used to drive thread delivery devices according to FIG. 3.
  • the flexible shaft 19, 19a, 19b is illustrated in one piece in all the described embodiments. This is the simplest embodiment, but exemplary embodiments are also conceivable in which the flexible shaft is in several pieces, the individual sections being connected to one another by coupling sleeves. This is exemplified in Fig. 10 when connecting to the gear 22, where this coupling sleeve is designated 135. These coupling sleeves can be non-rotatably connected to the inserted ends of the flexible shafts 19, 19a, 19b by means of clamping screws indicated at 136, but embodiments are also conceivable in which the flexible shafts have parts of form-fitting plug-in couplings at the end that allow a simple plug connection together with the coupling sleeve 135 to establish a rotationally fixed connection.
  • Suitable profiles of these plug-in coupling parts are splines and the like.
  • individual thread delivery elements 20, 200 rotatably on their associated bearing arms 39, 39a or their holder 18 by means of their own axis and the coupling with the flexible shaft via the aforementioned plug manufacture clutch. This can, if necessary, facilitate the assembly and replacement of the thread delivery elements.
  • each of the flexible shafts 19, 19a, 19b can be pretensioned in order to ensure an exactly phase-rigid yarn delivery to all yarn delivery elements 20, 200 placed on the flexible shaft.
  • FIGS. 24 to 26 also show a thread delivery unit 17 which is designed as a compact device and which, in terms of its basic structure, is designed similarly to the embodiment according to FIGS. 14, 15 and which, however, allows the thread wheel 20a while the flexible shaft is running 19 optional coupling or uncoupling.
  • a thread delivery unit 17 which is designed as a compact device and which, in terms of its basic structure, is designed similarly to the embodiment according to FIGS. 14, 15 and which, however, allows the thread wheel 20a while the flexible shaft is running 19 optional coupling or uncoupling.
  • the same parts as in the previously described embodiments are denoted by the same reference numerals and are not explained again.
  • the carrier plate 64 formed in one piece with the holder 18 has only one bearing point for the flexible shaft 19.
  • This bearing point is formed by a roller bearing 66, one in the inner ring the bearing element 135 forming the drive element is inserted, which is placed on the flexible shaft 19 and is connected in a rotationally fixed manner to it via the coupling ring 69 (FIG. 15) and the clamping screw 70.
  • the bearing sleeve 135 carries a clutch disc 136 connected to it in a rotationally fixed manner; the thread wheel 20a is also rotatably mounted on it, the axial securing of which is effected by a dowel pin 138 engaging in an annular groove 137 in the bearing sleeve 135.
  • a coupling ring 140 is axially displaceably mounted on a coaxial fitting shoulder 139 of the thread wheel 20a and is axially displaceably and non-rotatably coupled to the fitting shoulder 139 via a tongue and groove connection 141.
  • the clutch ring 140 carries on the side facing the clutch disc 136 a radial claw toothing 142 which can be brought into and out of engagement with a corresponding toothing on the clutch ring 136.
  • a cover disk 143 which is connected in a rotationally fixed manner to the thread wheel 20a, is seated on a corresponding ring extension 144 of the carrier plate 64 in such a way that a space which receives the coupling ring 140 is essentially dust-tight.
  • a U-shaped coupling bracket 147 is pivotally mounted on two bearing lugs 145 (FIG. 26) by means of an axis 146 against the action of a wrap spring 148, which carries two coaxial driving pins 149 which engage with play in an annular groove 150 of the coupling ring 140 .
  • An actuation bracket 151 is fastened to the coupling bracket 147, which cooperates with a crank-shaped part 153 of an actuation shaft 154, which is rotatably mounted at 155 in corresponding bearing parts of the carrier plate 64 and which carries a rotary handle 156 projecting over the carrier plate 64 at the end.
  • the clutch ring 140 is coupled in a rotationally fixed manner to the clutch disc 136 via the dog clutch teeth 142, so that the thread wheel 20a is coupled in a rotationally fixed manner to the bearing sleeve 135 and thus to the flexible shaft 19 via the tongue and groove connection 141.
  • the crank part 153 is pivoted clockwise by corresponding actuation of the rotary handle 156
  • the clutch bracket is in turn pivoted about the axis 146 in the counterclockwise direction with reference to FIG. 25, with the result that the clutch ring 140 is out of position Engaged with the clutch disc 136 and thus the thread wheel 20a is unlocked.
  • a detent recess 157 arranged on the actuation angle 151 holds the actuation shaft 154 in the position corresponding to the unlocked clutch until the clutch is engaged again by corresponding actuation of the rotary handle 156.
  • the thread wheel 20a can also be axially removed from the bearing sleeve 135.
  • a switch 159 arranged on the cover plate 143 senses the pivoting position of the coupling bracket 147; he can, for example, control a lamp 160 arranged in the lamp 30, which indicates the respective operating state of the coupling.
  • FIG. 24 it can be seen that the thread inlet eyelet 35 and the plate brake 36 are attached to the support plate 64 via an arm 161; the inlet sensor arm 31 and the outlet sensor arm 32 are also shown.
  • the associated thread monitors are housed in the space enclosed by the cover plate 143.
  • the two outlet eyelets 37, 38 (FIG. 3) are replaced by corresponding outlet hooks 37a, 38a, between which the outlet sensor arm 32 can engage with an open thread eyelet 162.
  • the thread outlet sensor arm 32 can assume two limit positions, indicated by dashed lines in FIG. 24, depending on the thread tension. The first position is the operating position; the second position is the stop position, in which the thread monitor issues a switch-off signal for the machine because, for example, there is a thread break.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP89112902A 1988-07-19 1989-07-14 Fadenliefervorrichtung für Textilmaschinen Ceased EP0351722A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824437 1988-07-19
DE3824437A DE3824437C1 (ja) 1988-07-19 1988-07-19

Publications (1)

Publication Number Publication Date
EP0351722A1 true EP0351722A1 (de) 1990-01-24

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ID=6359005

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Application Number Title Priority Date Filing Date
EP89112902A Ceased EP0351722A1 (de) 1988-07-19 1989-07-14 Fadenliefervorrichtung für Textilmaschinen

Country Status (9)

Country Link
EP (1) EP0351722A1 (ja)
JP (1) JPH03501633A (ja)
KR (1) KR900702106A (ja)
CN (1) CN1040832A (ja)
BR (1) BR8907029A (ja)
DD (1) DD287543A5 (ja)
DE (1) DE3824437C1 (ja)
PT (1) PT91507A (ja)
WO (1) WO1990001083A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016934A1 (de) * 1990-05-25 1991-11-28 Memminger Iro Gmbh Fadenliefereinrichtung fuer textilmaschinen, insbesondere rundstrickmaschinen, und fadenliefereinheit dafuer
EP0742304A1 (de) * 1995-05-06 1996-11-13 MEMMINGER-IRO GmbH Fadenzuliefervorrichtung
CN1061011C (zh) * 1993-07-10 2001-01-24 巴马格股份公司 装备有储纱器的纺织机
CN104060385A (zh) * 2014-07-09 2014-09-24 徐挺 具有自动照明的双面小圆机
CN106149190A (zh) * 2016-08-31 2016-11-23 浙江彩蝶实业有限公司 提高大圆机传动稳定性的方法及大圆机

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
DE4102533C1 (en) * 1991-01-29 1992-05-21 Memminger-Iro Gmbh, 7290 Freudenstadt, De Yarn delivery installation for circular knitting machine - has rotatable yarn delivery component connected to drive source via shaft contg. blocking device preventing relaxation out of torsion condition
EP2115196B1 (de) * 2006-12-22 2016-12-07 Memminger-IRO GmbH Fadenliefergerät mit verbessertem absteller
DE102007027467A1 (de) * 2007-06-14 2008-12-18 König, Reinhard, Dr. Ing. Maschine zum Spinnen und Stricken sowie ein Verfahren
CN101613908B (zh) * 2008-06-27 2013-02-13 山德霓股份公司 结构非常简单的带有纱线切割装置的单针筒圆型针织机
CN103628248B (zh) * 2013-10-29 2016-03-09 陆粉干 圆筒织机纱线支架升降的水平自适应结构
CN114411321B (zh) * 2021-12-30 2023-07-07 石狮市成鑫针织机械有限公司 一种具有自适应送纱功能的针织大圆机

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FR1294926A (fr) * 1961-04-21 1962-06-01 Rop Bureau Dispositif d'entraînement pour organe rotatif d'un métier de bonneterie
US3303671A (en) * 1966-05-03 1967-02-14 Jr Thomas Anderson Oliver Yarn feeding means for knitting machines
GB1109788A (en) * 1966-03-30 1968-04-18 Standard Knitting Company Ltd Improved method of and means for feeding metallic yarns or threads to knitting machines

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US2938365A (en) * 1956-07-26 1960-05-31 Frederic H Lassiter Yarn length control means
US3226955A (en) * 1963-04-25 1966-01-04 Lawson Engineering Co Method and apparatus for feeding yarn to a knitting machine
DE1785501B2 (de) * 1966-03-25 1975-07-03 Fouquet - Werk Frauz & Planck, 7407 Rottenburg Vorrichtung zur Erzielung einer gleichmäßigen Fadenlieferung an allen Strick- oder Wirksystemen von mehrsystemigen Rundstrick- oder Rundwirkmaschinen oder an mehreren getrennten einsystemigen Rundstrick- oder R und wirkmaschinen
SE314157B (ja) * 1967-10-20 1969-09-01 K Rosen
DE2461746C2 (de) * 1974-12-28 1984-01-05 Memminger Gmbh, 7290 Freudenstadt Fadenliefervorrichtung für Textilmaschinen
DE3233869C2 (de) * 1982-09-13 1985-04-04 Memminger Gmbh, 7290 Freudenstadt Vorrichtung zum Zuliefern von elastomeren Fäden, insbesondere für Strick- und Wirkmaschinen

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Publication number Priority date Publication date Assignee Title
FR1294926A (fr) * 1961-04-21 1962-06-01 Rop Bureau Dispositif d'entraînement pour organe rotatif d'un métier de bonneterie
GB1109788A (en) * 1966-03-30 1968-04-18 Standard Knitting Company Ltd Improved method of and means for feeding metallic yarns or threads to knitting machines
US3303671A (en) * 1966-05-03 1967-02-14 Jr Thomas Anderson Oliver Yarn feeding means for knitting machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4016934A1 (de) * 1990-05-25 1991-11-28 Memminger Iro Gmbh Fadenliefereinrichtung fuer textilmaschinen, insbesondere rundstrickmaschinen, und fadenliefereinheit dafuer
CN1061011C (zh) * 1993-07-10 2001-01-24 巴马格股份公司 装备有储纱器的纺织机
EP0742304A1 (de) * 1995-05-06 1996-11-13 MEMMINGER-IRO GmbH Fadenzuliefervorrichtung
US5716024A (en) * 1995-05-06 1998-02-10 Memminger-Iro Gmbh Yarn supplying device
CN104060385A (zh) * 2014-07-09 2014-09-24 徐挺 具有自动照明的双面小圆机
CN104060385B (zh) * 2014-07-09 2015-11-11 徐挺 具有自动照明的双面小圆机
CN106149190A (zh) * 2016-08-31 2016-11-23 浙江彩蝶实业有限公司 提高大圆机传动稳定性的方法及大圆机

Also Published As

Publication number Publication date
JPH03501633A (ja) 1991-04-11
DD287543A5 (de) 1991-02-28
PT91507A (pt) 1991-03-20
CN1040832A (zh) 1990-03-28
BR8907029A (pt) 1990-12-26
WO1990001083A1 (de) 1990-02-08
DE3824437C1 (ja) 1990-02-01
KR900702106A (ko) 1990-12-05

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