EP0605464B1 - Yarn feed device for yarn-using textile machines - Google Patents

Yarn feed device for yarn-using textile machines Download PDF

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Publication number
EP0605464B1
EP0605464B1 EP92918729A EP92918729A EP0605464B1 EP 0605464 B1 EP0605464 B1 EP 0605464B1 EP 92918729 A EP92918729 A EP 92918729A EP 92918729 A EP92918729 A EP 92918729A EP 0605464 B1 EP0605464 B1 EP 0605464B1
Authority
EP
European Patent Office
Prior art keywords
thread
delivery
storage drum
rotor
drive motor
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.)
Expired - Lifetime
Application number
EP92918729A
Other languages
German (de)
French (fr)
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EP0605464A1 (en
Inventor
Erich Roser
Original Assignee
ROSER, Erich
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
Priority to DE4132003 priority Critical
Priority to DE4132003 priority
Priority to DE19924206607 priority patent/DE4206607A1/en
Priority to DE4206607 priority
Application filed by ROSER, Erich filed Critical ROSER, Erich
Priority to PCT/DE1992/000751 priority patent/WO1993006283A1/en
Publication of EP0605464A1 publication Critical patent/EP0605464A1/en
Application granted granted Critical
Publication of EP0605464B1 publication Critical patent/EP0605464B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B15/00Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44Tensioning devices for individual threads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00Forwarding filamentary material
    • B65H51/30Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/16Braked elements rotated by material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40Applications of tension indicators
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B15/00Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48Thread-feeding devices
    • D04B15/482Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B15/00Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48Thread-feeding devices
    • D04B15/482Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484Yarn braking means acting on the drum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00Problem to be solved or advantage achieved
    • B65H2601/50Diminishing, minimizing or reducing
    • B65H2601/52Diminishing, minimizing or reducing entities relating to handling machine
    • B65H2601/524Vibration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Abstract

Proposed is a yarn feed device designed to feed yarn to textile machines. In order to ensure optimum control of the yarn feed, even when more than one yarn is being fed, the device has a yarn-storage drum (5) which is integral with the rotor or armature of the drive motor, the circumference of the drum comprising a mesh (29) of criss-crossed wires. In order to be able to control the tension in the yarn between the feed device and the user machine, a yarn-tension sensor (8) is fitted, mechanical deflection of which produces an electronically actuated adjustement of the drive motor.

Description

  • The invention relates to a thread delivery device as a thread feeder for textile machines according to the preamble of claim 1.
  • State of the art:
  • There are already thread delivery devices - also called storage supplier - known as a thread feeder for textile machines, with a storage drum attached to the shaft end of an electric motor, on the circumference of which several turns of the thread to be conveyed lie without slip (DE-C 34 29 207). The speed of the storage drum is transferred directly to the electric motor of the storage drum by means of suitable pulse generators on the circular knitting machine via control electronics. This creates a so-called electrical wave between the machine and the thread delivery device. Other sensors that scan the thread readjust the setpoint.
  • Also known is a thread delivery device (DE-C-38 32 381; DE-C-38 20 618), the storage drum of which is also attached to the shaft end of an electric motor. Here, however, the signal is given to the motor via a sensor lever on the thread, which is magnetically held in a changeable position. The adjustable return force on the lever then corresponds to the changeable setpoint for the required thread tension.
  • In textile machines, when the knitting machine is switched on directly, a certain amount of thread with the corresponding setpoint is required immediately. The commercially available motors required for this with a correspondingly sufficient starting torque and the required ramp-up time have a size that cannot be installed in the housing sizes currently used. In known devices, a sensor lever was therefore provided, which creates a variable thread reserve between the storage drum and the thread consumer. During the dismantling of this reserve, the engine can then be brought up to the required speed, which corresponds to the desired delivery quantity. This thread reserve is by multiple deflection of the thread, for. B. achieved by eyelets. However, this creates extreme friction losses and in particular fluff formation. In addition, rubber-elastic threads can hardly be regulated in this way or only very slow speeds are possible at most.
  • The known thread delivery devices have an upstream, fixed or variable thread brake for perfect winding formation on the storage drum. For this purpose, the thread is either through an eyelet z. B. is weighted by means of a ball, guided or it is pulled through a disc brake. Here too, depending on the material used, there are unpleasant amounts of flow. The thread windings on the storage drum will naturally lie hard and pull together with large braking forces, whereby most types of thread are stretched. The thread then relaxes at the measuring point, e.g. B. on a feeler lever, wherein the feeler lever itself can vibrate. The lever must therefore be mechanically calmed again.
  • The known devices therefore still have a few weak points overall, which must be regarded as an unsatisfactory overall solution with too much technical effort.
  • The invention has for its object to provide a yarn delivery device in which the individual assemblies can be precisely coordinated with each other and thus an optimal overall system is created. The object of the invention is also to improve or optimize individual assemblies of the thread delivery device for respective special applications.
  • This object is achieved on the basis of a yarn delivery device according to the preamble of claim 1 by the characterizing features of claim 1.
  • In the subclaims, advantageous and expedient, and in some cases independently inventive measures are given as partial solutions.
  • Advantages of the invention:
  • The thread delivery device according to the invention has the advantage over the known devices that all components of the device have been optimized and matched to one another.
  • In order to be able to immediately replace the known belt-driven devices with their specified housing size, a completely new, electronically driven DC motor was first created, which has a number of advantages over known stepper motors. These advantages must first of all be seen in the very simple construction of the motor with very little movable motor mass, with at least the same or better Acceleration ability. The design of the EC motor enables a detent force-free drive in the de-energized state, so that a simple mechanical threading of the thread is possible. Due to the use of a low-mass rotor or rotor, which serves as a magnet carrier for permanent magnets, a very small size with a small axial length can be achieved. The engine works with low-noise operation and high efficiency and thus low heating. The possible arrangement of the associated electronic circuit board near the motor also enables a very compact structure of the overall device. The high-quality permanent magnets in the rotor, which interact with a corresponding number of coil groups in the stator, are responsible for the high efficiency.
  • An essential advantage of the invention lies in the combination of the motor according to the invention with the storage drum connected to it in one piece. The rotor or rotor of the DC motor serves as the basis for the storage drum, whereby - apart from the mass of the high-performance magnets - a system was created that is extremely light and therefore easy to accelerate. For this purpose, the system is made of a light plastic disc as a magnetic carrier and rotor, to which the X-shaped steel wires are attached in one piece and connected with an outer ring. The X-shaped steel wires on the circumference of the storage drum form a run-up slope for the thread, whereby two threads can be stored and thus delivered at the same time.
  • A further advantage of the invention lies in the control of the thread tension after the storage drum, which is brought about by a special spiral spring designed in the shape of a trumpet or as a rotation cone. The deflection of the spiral spring is directly related to the thread tension and thus the amount of thread required.
  • By means of an electronic evaluation of the deflection of the spiral spring, the storage drum drive motor is controlled immediately and without delay.
  • Also particularly advantageous is a thread brake provided in front of the storage drum, which likewise works with the lowest bearing friction resistances and can be adjusted and / or regulated by a magnetic field provided on the side. In this way, the feed of the thread to the storage drum can be regulated and adjusted.
  • The thread brake, storage drum and spiral spring are matched to one another in terms of control technology in such a way that optimum thread feeding for the textile machine is ensured.
  • Further details and advantages essential to the invention are shown in the drawing and explained in more detail in the following description.
  • Show it
  • Fig. 1
    a side view of the thread delivery device,
    Fig. 2
    a front view of the thread delivery device,
    Fig. 3
    a longitudinal section of the thread delivery device, in particular through the DC motor,
    4a, 4b
    a detailed representation of the storage drum,
    5a, 5b
    the spiral spring for controlling the thread tension,
    Fig. 6
    a section through the thread brake and
    Fig. 7
    a schematic representation of the thread break sensor.
    Description of the embodiment:
  • The thread delivery device 1 shown in Figures 1 to 3 consists of a housing 2 for receiving a drive motor 3 and a circuit board 4 for the control electronics. The drive motor 3 forms a structural unit with the storage drum 5, as shown in more detail in Figures 4a, b.
  • The thread delivery device 1 also has a thread brake 6, a thread break sensor 7 as units connected upstream of the storage drum 5, and a thread tension sensor 8 which is connected downstream of the storage drum 5 to control the thread tension. A more detailed representation of this system is shown in Figures 5a, 5b. The individual components of the thread delivery device according to the invention are explained in more detail as follows:
  • In Figure 3, the drive unit 9 of the yarn delivery device 1, consisting of the drive motor 3 and storage drum 5 is shown in more detail.
  • The drive motor 3 is designed as an electronically commutated four-pole DC motor. Due to the disc rotor structure, it has a small axial length. The DC motor 3 consists of a rotor or rotor 10 designed as a plastic disk, which serves as a magnet carrier. For this purpose, four round or differently shaped permanent magnets 12 are embedded in the plastic disk 11.
  • The stator 13 of the direct current motor consists of two coil groups 14, 15 with yoke plates 16, 17 arranged behind them, which are placed on a hollow shaft 18. The rotor 10 is mounted on the hollow axis 18 via two ball bearings 19 to compensate for the alternating tilting moment caused by the magnetic field. The hollow shaft 18, with a longitudinal bore 20 and two transverse bores 21, 22 at its respective end, serves to receive the switching connection wires 23 between the coil group 14 and the control board 4. The coil group 15 is connected to the circuit board 4 via a corresponding switching connection wire 23 '. This hollow shaft 18 also receives a switching connection wire which actuates the thread break indicator light.
  • The structure of the coil groups 14, 15 is completely identical and can therefore be produced using the same tools.
  • The hollow axis 18 passes through the circuit board 4 for the control electronics and is fastened to the rear of the housing by means of a nut 24.
  • The rotor 10, which is designed as a plastic disk 11 with magnets 12, is designed such that it also serves as a component of the storage drum 5, also called a thread wheel. For this purpose, the outer rim 25 of the plastic disk 11 has a circumferential shoulder 26 with the bores 27, into which the individual wires 28, 28 'of a thread feed cross are embedded, which form a wire mesh 29 all around (see also FIGS. 4a, 4b. The wire mesh 29 becomes delimited on the side opposite the plastic disk 11 by an outer plastic ring 30, which likewise has bores 31 for receiving the individual wires 28, 28 '.
  • On the outer diameter or the lateral surface of the plastic ring 30 or the plastic disk 11 formed thereby there are z. B. five to eight thread feed crosses in an X-shaped arrangement, consisting of the inserted polished steel wires 28, 28 ', which together forms the wire mesh 29 arranged on the outer circumferential surface of the storage drum 5. The angle α enclosed in the axial direction of the drive motor between two associated wires 28, 28 'is approximately α ≈ 60 ° to 110 ° (see FIG. 4a).
  • The electronically controlled direct current motor 3 works without detent force in the de-energized state, so that simple manual threading of the threads is possible. A low-mass design of all rotating parts of the rotor 10 and the storage drum 5 and the use of high-quality permanent magnets 12 result in extremely short run-up times of the motor. The motor is controlled by reaction force in order to regulate the thread tension. Due to the high efficiency of the DC motor, there is little heating. As a result, the electronic circuit board 4 can be arranged directly in the vicinity of the motor, which results in a very compact construction of the overall device.
  • As can be seen from FIGS. 1 and 3, the storage drum 5 is equipped on the front side with an additionally flashing indicator light 32 for indicating a broken thread.
  • The front side of the device shown in FIG. 2 and the associated side view in FIG. 1 further shows an inlet eyelet 35, 36 for feeding two threads 33, 34 for feeding the threads to a double-thread brake 6. This double-thread brake 6, shown in more detail in FIG. 6, consists of two closed ball bearings 37, 38 arranged side by side in a ball bearing housing 74, on the outer surface of which the respective thread 33, 34 with at least a turn is applied. The direction of the thread is maintained. Between the ball bearings 37, 38 there is a permanent magnet 39 in the ball bearing housing, with an axial two-sector magnetization, ie an upper north pole and a lower south pole. With each rotation of the respective bearing, the bearing balls of the ball bearing are tightened once (e.g. north pole) and repelled in the next sector (south pole), which creates a braking effect as bearing friction.
  • There are certain running-in resistances between the thread brake 6 and the thread spool (not shown in more detail). It has been shown that the outer ring of the respective ball bearing 37, 38 does not follow when the series resistance to the coil is small. The loop around the ball bearing then slips on the outer diameter or the outer surface of the ball bearing and produces only a slight braking effect. If the running-in resistances between the spool and the storage drum increase due to sporadic resistances such as knots or lint accumulations, the thread loop is drawn around the outer ring of the ball bearing, whereby the outer ring of the respective ball bearing 37, 38 is entrained. These interactions create an almost horizontal braking characteristic, i.e. H. an extremely even thread transport.
  • If the permanent magnet 39 is replaced by a current-carrying electromagnetic coil, the braking force can be regulated continuously within wide limits. The thread brake 6 can be equipped with a ball bearing for the delivery of a thread or with a double ball bearing for the delivery of two threads. If two bearings are provided, they both have an independent braking effect.
  • The thread brake 6 is followed by a thread break sensor 7. This arrangement is shown in more detail in FIG. 2 and in FIG. 7.
  • A bearing 40 mounted in the housing 2 was used to support a lever 41. At the upper end of the lever 41 there is a pin 42 perpendicular to the lever 41, which is held in its position or position by means of the continuous thread 33, 34. If a thread break occurs, the lever 41 falls due to gravity into the broken position of the thread break sensor 7 'shown in FIG. At the lower end of the lever 41, a shaft 43 leads through the bearing 40. At the lower end of the shaft 43 there is a permanent magnet 44 which is attached in such a way that a reed relay 45 is switched on or off by the pivoting movement of the lever shaft 43. The reed relay actuates the thread break indicator light 32 at the same time as the circular knitting machine is switched off. The lever 41 exerts only a slight frictional effect on the thread 33, 34 via the pin 42. It can be installed in the same way or as an alternative between the storage drum 5 and the thread tension sensor 8 in order to check a thread break there in the same way.
  • If the device is not installed vertically, e.g. B. a horizontal arrangement, the deflection of the lever 7 must be effected by an additional spring when the thread breaks. The device can thus be operated in any position.
  • With a circular knitting machine, the device is preferably directed radially outward with its front side or operating side 77 in order to enable simple front-side operation.
  • The thread 33, 34 guided via the thread brake 6 and the thread break sensor 7 is fed to the storage drum 5 as shown in FIGS. 1, 2 and 7. Therefor form the storage drum 5 and the rotor 10 of the drive motor 3 a structural unit, using extremely light materials, so that a very low mass must be accelerated. The run-up time of the motor is so short that threads of up to approx. 10 m per second can be fed directly to the running machine. The clocked, collectorless and electronic control for the rotor 10 ensures a very low current consumption, which is up to three times the current consumption of known devices. Even in the event of an overload, the current consumption is automatically kept at a set maximum value, so that no damage to the rotor or rotor or the windings can occur even under prolonged standstill under load.
  • The polished steel wires 28, 28 'used in the X-shape to form the wire grid 29 provided on the outer surface of the storage drum 5 ensure automatic thread feed on the storage drum 5. In this construction according to the invention, the need for special run-up bevels is unnecessary since this is due to the X-shaped arrangement of the wires 28, 28 'takes place itself. There is also no need for a defined starting point for the thread on the storage drum 5. As shown in more detail in FIG. 1 in connection with FIG. 4 a, the threads 33, 34 on the left half 46 and on the right half 47 of the width b of the wire mesh 29 can be fed. If the total width b of the wire mesh 29 is divided into six parts (2 × 3/3), each thread can be fed without problems in the outer two areas 48, 49, which have a width a ≈ b / 3. The point of accession of the respective thread 33, 34 on the storage drum 5 can accordingly be chosen freely depending on the desired winding length, since the outer accrual area 48, 49 permits a large number of turns. Two threads can be stored and delivered for two different knitting systems with the same thread consumption at the same time.
  • Due to the X-shaped arrangement of two wires 28, 28 'of the wire mesh 29 arranged in relation to each other, each thread that is fed runs basically on the slant of the X-shape to the central crossing point 50 of the respective wires (center line 51). The thread run-up is therefore completely uncritical, since the individual turns are lined up next to each other. Therefore, from the center line 51 connecting the crossing points 50 to one another, the wound thread layers are lined up to the left and to the right. FIG. 5 a shows, for example, a storage drum 5 in which four thread layers 52 lying next to one another are wound on the lower half of the storage drum 5. Each individual or both running threads basically runs from the center line 51, as shown in FIG. 4 a. The two outgoing threads are touching each other in the X-shaped crossing point. Since the diameter of the storage drum 5 is the same size for both threads at this point, both thread lengths are also identical. A thin cutting disc 75 can also be attached on the center line 51 to separate the two running threads. An attachment of the disc is unnecessary because transverse holes 76 are provided in the disc, through which the crossing point 50 of the wires 28, 28 'runs
  • As can be seen from FIGS. 1, 2 and 5 a, the storage drum 5 is followed by a thread tension sensor 8, which serves to control the thread tension. Since the two threads 33, 34 drawn off from the storage drum 5 are in principle drawn off from the same outside diameter of the storage drum 5, namely from the center line 51 (X crossing point 50), it is generally sufficient for only one thread 33 to be checked via the thread tension sensor 8 is, while the other thread 34 is guided by the storage drum 5 directly through an eyelet 53 (see Figure 2).
  • The double assignment of the thread delivery device with threads 33, 34 compared to conventional devices with only one thread has considerable economic importance.
  • If the thread tension is changed automatically or by hand during the knitting process, the uncontrolled thread, like a twin, also undergoes the same change.
  • Due to the special arrangement of the X-shaped wires 28, 28 ', the thread brake 6 can possibly be dispensed with for some types of thread, because in most cases the thread resistance itself is sufficient to enable the thread to be wound onto the storage drum 5 in a braked manner. The thread resistance results, for example, from the unwinding process from the bobbin and the associated deflections.
  • In this connection it must be emphasized that even bare rubber threads can be processed excellently by the arrangement according to the invention. Here, too, a thread brake 6 may not have been shown to be absolutely necessary, i. H. the thread can pass the brake 6 without touching it. Fine copper enameled wires can also be easily stored on the storage drum 5 and delivered in the desired wire tension, the insulating enamel not being damaged.
  • The control of the thread tension by means of a thread tension sensor 8 shown in FIGS. 1, 2 and 5a and 5b is preferably carried out by a trumpet-shaped spiral spring 54 which is attached to a rotatable head 55. The rotatable head 55 has a shaft 56 which is guided in a bearing 57 into the interior of the housing 2. At the lower end of shaft 56 a permanent magnet 58 is attached centrically or eccentrically in such a way that it lies with the dividing line north / south on the central axis 59 of the device (see FIG. 2 and FIG. 5b). An iron yoke 60 of a Hall sensor 61 on the opposite side holds the magnet 58 in the central position M, as shown in FIG. 5b. The dividing line 62 between the north-south pole of the permanent magnet 58 is here on the central axis 59. The Hall sensor 61 is placed in such a way that it activates the motor control with a small angular deviation β from this central position M. Only a slight increase in the thread tension of the thread 33 causes the spiral spring 54 arranged on the center line 59 to deflect in the direction of the arrow 63 shown in FIGS. 2 and 5a, 5b is small and short-term that the movement is difficult to see visually. Due to the special motor design, very short run-up times can be achieved. A separate thread storage device is therefore no longer necessary. The thread tension can be adjusted manually on the potentiometer 64 or computer controlled via the computer connection 65. By adjusting the offset zero tension on the Hall sensor, the desired position of the north-south transition of the permanent magnet 58 can be shifted, as a result of which the thread tension can be set by means of V ref or by means of computer control.
  • The formation of the thread tension sensor 8 with a wound, trumpet-shaped spiral spring 54 has the advantage that vibrations are absorbed, which can arise from the polygonal thread support on the circumference of the storage drum 5, whereby a quiet thread flow is achieved. The trumpet-shaped coil spring 54 with the upper trumpet-shaped outlet 66 for the tangential introduction of the Thread 33 accordingly also represents an attenuator in the arrangement of the thread tension sensor 8.
  • Position 66 shows an optical setpoint display in FIG. 2, position 67 shows an optical operating display of the device. Position 68 shows a device on / off switch.
  • 1 and 3 furthermore show standard pins 69, 70 which, together with the ground connection 71, ensure the required power supply. The connection 69, 71 is used to supply the device with the required known voltage of 24 volts. The pin 70 serves as a conductor for the machine stop when the thread breaks.
  • The special embodiment of the thread delivery device according to the invention allows a direct replacement of the known belt-driven devices. The knitting machine is also considerably simplified in terms of its construction and effort. Of course, the devices according to the invention can also be operated in any position, provided that the thread break sensor 7 is not due to its own weight, but z. B. supported by a spring, can fall off when the thread breaks. The thread run can also be guided from the eyelet 35, 36 without deflection via the thread brake 6 to the thread tension sensor 8. The trumpet shape of the spiral spring 54 permits a gentle deflection of the thread into the spring, as well as a gentle guiding within the spring up to its lower outlet 72. The result is a hardly occurring fluff formation over the entire course of the thread.
  • The device weight could be reduced to half of the belt-driven devices. The collectorless drive motor 3 automatically achieves a service life that of depends on the service life of the ball bearings used. The devices are practically maintenance-free.
  • No additional lamps have to be used to display the thread break. A long-lasting flashing system by means of the thread break indicator light 32 allows a service life of approx. 5 to 10 years.
  • If a conventional knitting machine required two or more different thread quantities, this was solved with several drive belts in several levels. The mechanical effort is correspondingly high. Devices according to the invention, on the other hand, automatically adapt to the desired amount of thread, with the set thread tension being regulated at the same time. The drive motor is designed so that it has no cogging torque. The threads can therefore be pulled over the storage drum 5 with almost no resistance.

Claims (19)

  1. A thread delivery device as a thread feeder for textile machines with a possibly necessary thread brake (6) for at least one thread (33, 34) drawn from a bobbin by a drive motor (3), the thread running in a plurality of adjacently disposed turns on a storage drum (5), whereby at least one thread (33) emerging from the storage drum (5) is guided over a thread tension sensor (8), the mechanical deflection of which is electronically evaluated and converted for controlling the drive of the drive motor (3) and thus the rate of thread advance, characterised in that the storage drum (5) for storing a definite quantity of thread requirement is constructed to be integral with a rotor (10) of the drive motor (3) and has, disposed X-wise, steel wires (28, 28') for forming a wire mesh (29) on the periphery of the storage drum in such a way that one or two threads (33, 34) can be fed to or removed from the storage drum (5).
  2. A thread delivery device particularly according to claim 1, characterised in that the drive motor (3) is constructed as a commutatorless electronically switched direct current motor, the rotor (10) of which is integral with the storage drum (5), the rotor (10) being a disc rotor (10) fitted with heavy duty permanent magnets (12) and in that the drive motor (3) furthermore comprises a stator (13) which consists of two oppositely disposed identical coil groups (14, 15) with back-circuit plates (16, 17).
  3. A thread delivery device according to claim 1 or 2, characterised in that the rotor (10) is constructed as a synthetic plastics disc (11) which serves as a magnetic carrier to accommodate preferably four permanent magnets (12).
  4. A thread delivery device according to claim 1, 2 or 3, characterised in that when it is currentless, the drive motor (3) is free from locking force and is controlled by reaction force in order to regulate the thread tension.
  5. A thread delivery device according to one of the preceding claims 2 to 4, characterised in that the rotor shaft (18) of the rotor (10) is constructed as a hollow spindle (18) which has transverse bores (21, 22) at its ends for feeding switching connecting wires (23) to the coils (14) and to the luminous thread break alarm (32).
  6. A thread delivery device particularly according to claim 1, characterised in that the storage drum (5) for storing a certain quantity of required thread is formed by a wire mesh (29) which is X-shaped in side view and which is in particular disposed parallel on the periphery of the motor rotor (10, the thread (33, 34) being capable of being fed particularly on the cover diameter remote from the X-shaped point (50) of intersection of the individual wires (28, 28') so that it can then slide inwards and in that in particular two threads can be wound on or unwound.
  7. A thread delivery device according to one or more of claims 1 to 6, characterised in that the synthetic plastics disc (11) of the rotor (10) is formed from extremely lightweight material and is integral with the storage drum (5), the synthetic plastics disc (11) being formed by an inner disc which has socket-like bores (27) for the wires (28) on its outer periphery and outer ring (25), the wires (28), arranged like an X, being connected to an outer synthetic plastics ring (30).
  8. A thread delivery device according to claim 7, characterised in that the wire mesh (29) is formed from approximately 4 to 8 cruciform thread feeding devices (28, 28') which are disposed X-wise and inserted tangentially into the imaginary outer surface between the outer edge of the synthetic plastics disc (11) and the outer synthetic plastics ring (30).
  9. A thread delivery device, particularly according to claim 1, characterised in that control of the thread tension occurs downstream of the storage drum (5), particularly via a thread tension sensor (8) for regulating the rotary speed of the drive motor (3), the thread tension or thread pull from the consumer unit being capable of being measured electronically.
  10. A thread delivery device according to claim 8, characterised in that control of the thread tension takes place via a thread tension sensor (8) and in particular by a spiral spring (54) of trumpet-shaped cross-section or constructed as a cone of rotation and which is constructed as a guiding and/or damping member, the thread (33) being passed through the spiral spring (54).
  11. A thread delivery device according to claim 9 or 10, characterised in that the upper part of the coil spring (54) widens out trumpet-like to receive the thread (33) while its lower and thinner portion is connected to a rotatable head (55), the rotatable head (55) being so mounted to pivot about a bearing spindle (56) parallel with the motor axis (73) that a lateral deflection of the spring (54) due to a pull on the thread produces a rotary movement of the pivot and bearing spindle (56).
  12. A thread delivery device according to one or more of the aforesaid claims 9 to 11, characterised in that rotation of the bearing spindle (56) of the coil spring (54) generates an electronic measured value for regulating the rotary speed of the drive motor (3), whereby in particular the permanent magnet (58) connected to the bearing spindle (56) produces a variation in a Hall voltage.
  13. A thread delivery device particularly according to claim 1, characterised in that upstream of the storage drum (5) there is a thread brake (6) at which at least one and in particular two supplied threads (33, 34) is or are guided over a ball bearing outer ring (37, 38), the bearing friction resistance of the ball bearing (37, 38) being adjustable and/or regulable.
  14. A thread delivery device according to claim 13, characterised in that the bearing friction resistance of the ball bearing (37, 38) is provided by means of a permanent magnet (39) disposed between the ball bearings and the north and south poles of which are disposed parallel with the balls of each ball bearing (37, 38).
  15. A thread delivery device according to claim 13, characterised in that the bearing friction resistance of the ball bearings (37, 38) is controlled by means of a coil which can be actuated electromagnetically.
  16. A thread delivery device according to one or more of the preceding claims, characterised in that a thread brake sensor (7) is provided in the form of a toggle lever (41) for shutting down the thread drive in the event of thread breakage.
  17. A thread delivery device according to claim 16, characterised in that the mounting of the toggle lever (41) comprises a rotatable spindle (43) and, connected to it, a permanent magnet (44) which, when deflected, actuates a reed relay (45) which serves to activate the illuminated thread breakage alarm and to shut down the machine.
  18. A thread delivery device according to claim 1 or 6, characterised in that a separating disc (75) is inserted at the intersection of the wires (28, 28'), the separating disc (75) preferably comprising transverse holes (76) through which the wires (28, 28') can pass.
  19. A thread delivery device according to claim 1, characterised in that the operating side (77) of the thread delivery device is directed radially outwardly in relation to the disposition of a circular knitting machine.
EP92918729A 1991-09-26 1992-09-03 Yarn feed device for yarn-using textile machines Expired - Lifetime EP0605464B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE4132003 1991-09-26
DE4132003 1991-09-26
DE19924206607 DE4206607A1 (en) 1991-09-26 1992-03-03 Thread delivery device for thread using textile machines
DE4206607 1992-03-03
PCT/DE1992/000751 WO1993006283A1 (en) 1991-09-26 1992-09-03 Yarn feed device for yarn-using textile machines

Publications (2)

Publication Number Publication Date
EP0605464A1 EP0605464A1 (en) 1994-07-13
EP0605464B1 true EP0605464B1 (en) 1995-06-21

Family

ID=25907723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918729A Expired - Lifetime EP0605464B1 (en) 1991-09-26 1992-09-03 Yarn feed device for yarn-using textile machines

Country Status (9)

Country Link
US (1) US5423197A (en)
EP (1) EP0605464B1 (en)
JP (1) JPH07502789A (en)
CN (1) CN1040350C (en)
DE (1) DE4206607A1 (en)
ES (1) ES2074891T3 (en)
MX (1) MX9205470A (en)
TW (1) TW217430B (en)
WO (1) WO1993006283A1 (en)

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DE19537215C2 (en) * 1995-10-06 1999-09-02 Memminger Iro Gmbh Thread delivery device for elastic yarns
AU7513996A (en) * 1995-10-12 1997-04-30 E.I. Du Pont De Nemours And Company Process and apparatus for knitting fabric with non-elastic yarn and bare elastomeric yarn and sweater knit fabric construction
DE19708139A1 (en) * 1997-02-28 1998-09-03 Erich Roser Thread delivery device, in particular for knitting and knitting machines
DE69819861T2 (en) * 1998-01-23 2004-11-04 Santoni S.P.A. Device for delivering an elastically expandable thread to knitting machines
DE19811240C2 (en) * 1998-03-14 2000-05-31 Memminger Iro Gmbh Thread delivery device with improved thread run
DE19813351A1 (en) * 1998-03-26 1999-09-30 Memminger Iro Gmbh Low inertia positive feeder for elastomer threads
IT1303022B1 (en) * 1998-04-17 2000-10-20 Btsr Int Spa Power Device for controlling yarn to a macchinatessile and the operation control method and production of
GB9904458D0 (en) * 1999-02-26 1999-04-21 New House Textiles Limited A device for tensioning yarn or the like
DE10318931B4 (en) * 2003-04-26 2005-10-20 Memminger Iro Gmbh Yarn feeder
DE102004009057A1 (en) * 2004-02-23 2005-09-08 Memminger-Iro Gmbh Electronic positive
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EP2029802B1 (en) 2006-06-21 2016-08-10 Memminger-IRO GmbH Yarn feeding apparatus
JP2009155779A (en) * 2007-12-27 2009-07-16 Murata Mach Ltd Loose yarn-tightening device and spinning machine equipped with the same
DE102011015880A1 (en) 2011-04-04 2012-10-04 Kern Antriebstechnik GmbH Yarn delivery
ITMI20111983A1 (en) 2011-11-02 2013-05-03 Btsr Int Spa positive feeder device for feeding at a constant tension wires
EP2602366A1 (en) * 2011-12-05 2013-06-12 Pai Lung Machinery Mill Co., Ltd. Yarn conveying system for circular knitting machines
CN102965827A (en) * 2012-12-13 2013-03-13 慈溪太阳洲纺织科技有限公司 Yarn tension detection device for knitting machine
WO2017027257A1 (en) * 2015-08-11 2017-02-16 American Linc, Llc Adjustable yarn tensioner, textile machine, and method for tensioning a continuously running yarn
US9856106B1 (en) * 2016-06-29 2018-01-02 The Boeing Company Dynamic feeding systems for knitting machines
DE102018115631A1 (en) * 2018-06-28 2020-01-02 Memminger-Iro Gmbh Thread delivery device and system with a thread delivery device
CN110923930A (en) * 2019-11-12 2020-03-27 台州施特自动化有限公司 Thread feeding mechanism for knitting equipment

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Also Published As

Publication number Publication date
MX9205470A (en) 1993-03-01
WO1993006283A1 (en) 1993-04-01
EP0605464A1 (en) 1994-07-13
ES2074891T3 (en) 1995-09-16
CN1040350C (en) 1998-10-21
CN1071212A (en) 1993-04-21
US5423197A (en) 1995-06-13
TW217430B (en) 1993-12-11
DE4206607A1 (en) 1993-04-01
JPH07502789A (en) 1995-03-23

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