EP0310857B1 - Dispositif changeur de fil, notamment pour des métiers à tricoter - Google Patents

Dispositif changeur de fil, notamment pour des métiers à tricoter Download PDF

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Publication number
EP0310857B1
EP0310857B1 EP88115433A EP88115433A EP0310857B1 EP 0310857 B1 EP0310857 B1 EP 0310857B1 EP 88115433 A EP88115433 A EP 88115433A EP 88115433 A EP88115433 A EP 88115433A EP 0310857 B1 EP0310857 B1 EP 0310857B1
Authority
EP
European Patent Office
Prior art keywords
yarn
thread
loop
changing device
new
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
EP88115433A
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German (de)
English (en)
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EP0310857A3 (fr
EP0310857A2 (fr
Inventor
Siegfried Nürk
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.)
Sipra Patententwicklungs und Beteiligungs GmbH
Original Assignee
Sipra Patententwicklungs und Beteiligungs GmbH
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Publication of EP0310857A3 publication Critical patent/EP0310857A3/fr
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Classifications

    • 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/62—Thread guides for circular knitting machines; Thread-changing devices with thread knotters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/04—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by knotting
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a thread changing device, in particular for knitting machines, with a knotting device for knotting a new thread on an old thread during a thread change, with thread clamps and cutting elements for the new and the old thread, the knotting device consisting of a grasping the new thread and into one resolved loop-laying wrap finger, a loop pivoting lever that introduces the old thread as an open loop into the loop during the thread sequence, and a movable clamping hook that extends through the loop and detects the end of the new thread.
  • a thread changing device with the features mentioned above has already been proposed in DE-OS 32 44 887.
  • the present invention relates to a development of such a thread changing device. You lie the task of designing a thread changing device of the type mentioned so that its operational reliability with regard to knot formation and a timely forwarding of the thread to the thread processing point is increased.
  • the stated object is achieved with the thread changing device according to the invention in that in the thread take-off direction behind the knotting device a maximum length of the thread compensation path leading via a spring-loaded swivel arm and a superior compensator thread brake which can be actuated briefly as a function of the position of the movable clamping hook and / or the loop swivel lever are provided are and that the clamping hook is combined with scissors for cutting the new thread.
  • the knot is formed on the running old thread, which leads to the essential advantages already listed in DE-OS 32 44 887 compared to knotting devices in which knot formation can only be carried out on standing threads.
  • the running old thread is stopped only briefly to tighten the thread knot formed. In this way, a perfectly firm thread knot is achieved which, when it moves on to a thread processing point, can no longer be loosened even with changing tensile loads.
  • the thread feed at the thread processing point is nevertheless not interrupted because thread is supplied from the thread compensation path during the short-term actuation of the compensator thread brake.
  • the thread supply line is by locking a compensator swivel arm on one precisely defined maximum length.
  • the path through which the thread knot runs from the knotting device to the thread processing point is precisely specified and can be used as a fixed value in a control part of the thread changing device, which also the knotting device of the thread changing device with regard to an exact placement of a formed one Knots in the knitted fabric controls.
  • the combination of the clamping hook, with which the end of the new thread is grasped when the knot is formed and pulled through the loop formed from the old thread, with a pair of scissors ensures that a final loop of the new thread, which may be formed in the knot, is formed is cut open or the end of the new thread is cut at all and a separate process of cutting the thread ends at a separate cutting station can be omitted.
  • the thread changing device can additionally have a thread drive device that can be actuated for a short time in the thread pull-off direction between the knotting device and the compensator thread brake, which consists, for example, of a blowing nozzle through which the thread runs.
  • a thread drive device that can be actuated for a short time in the thread pull-off direction between the knotting device and the compensator thread brake, which consists, for example, of a blowing nozzle through which the thread runs.
  • the desired increased operational reliability of the thread changing device in particular its knotting device, can be further increased by additional features.
  • the selectable threads can expediently be fed to the winding finger of the knotting device via a thread brake, the braking force of which can be varied depending on the position of at least one of the organs of the knotting device.
  • thread brakes that can be influenced electromagnetically have proven themselves, with which during sections of the knotting process either a specific braking force which holds the tension loop formed on the winding finger with the new thread is exerted, or short-term complete blocking is achieved during the tightening of a knot formed.
  • the knotting device can advantageously also be provided with mechanically effective thread securing members, which can comprise a push bracket which can be moved in the direction of the winding finger and act on the new thread, and a stationary thread guide edge running along a section of the movement path of the winding finger.
  • mechanically effective thread securing members can comprise a push bracket which can be moved in the direction of the winding finger and act on the new thread, and a stationary thread guide edge running along a section of the movement path of the winding finger.
  • a thread wiping part can be provided according to the invention as a thread securing element for grasping and wiping off the thread loop from the winding finger when the loop pivot arm is pivoted back be.
  • sensors connected to the control part of the thread changing device can be provided, with which at least the position of the loop pivoting lever and / or the clamping hook and / or the thread brakes, but advantageously also the position of the winding finger or the drive device assigned to these parts of the knotting device can be detected .
  • a stationary control cam can also be provided, along which the clamping hook can be guided and which can act on its clamp and the scissors combined with it.
  • the loop swivel lever in its operating position can rest with its thread running groove for the old thread free end against a stop that covers its thread running groove to a closed thread passage channel, so that the old thread, which continues to the thread processing point, cannot jump out before the knot formation , and which also prevents the loop formed from the new thread from sliding off the winding finger.
  • a winding finger 10 rotatable about an axis A with solid lines in its starting position and with dashed lines in a pivot position rotated 90 ° therefrom, a rack 11 serving to drive it, and a loop pivot lever 12 of the actual knotting device , a clamping hook 14 coupled to the loop pivot lever 12 via a spiral utility cylinder 13, a central drive cylinder 15 for the last-mentioned parts and a thread drive device 16.
  • a thread drive device From the knotting device upstream parts of the thread changing device one of, for example, four thread guides 17 and a thread brake upstream of it in the form of an electromagnetically actuated ball brake 18 and a thread clamp 19 associated with each thread guide and combined with thread scissors and their drive mechanism 20 for opening and closing can be seen.
  • FIG. 1 shows a housing 27 for electronic control parts, which are arranged on a circuit board 27.1, and a compressed air regulating valve 28 of the control part of the thread changing device.
  • FIG. 1 shows the thread changing device in a normal operating position, i.e. at time t0 in the time diagram according to FIG 4.
  • a thread 30, hereinafter referred to as the old thread coming from a thread store (not shown), successively passes through the ball brake 18 assigned to it and released, its thread guide 17, which is in the normal starting position, through a stationary centering part 29 of the knotting device which is common to all threads , the inactive thread drive device 16 designed as a blowing nozzle and the likewise inactive compensator thread brake 21, and runs over a first fixed thread roller 31 ', over the thread roller 24 of the compensator pivot arm 23 which is in its maximum pivoting movement and over a second fixed arrangement ete thread reel 31 to a thread processing point of a textile machine, in particular a knitting machine.
  • a thread reserve is formed between the thread rollers 31, 31 ', the length of which is determined by the respective position of the compensator swivel arm 23 stabilized by a guide track 59.
  • FIG. 2 shows, on an enlarged scale compared to FIG. 1, the area of the winding finger 10 of the thread changing device after it has been prepared for a thread changing, that is to say in the time diagram according to FIG. 4 between the times t2 and t3.
  • the old thread 30 continues to run via a thread guide eyelet 32 to its thread guide, which is in the normal position 17 and in the manner described above through the thread changing device.
  • Another of the total of four thread guides 17 ', together with the preceding thread guide eyelet 32', is shifted upward from the normal position.
  • the thread guided by it is referred to below as the new thread, is designated by the reference number 30 'and is held at its end 30a' in the thread clamp 19 'associated with it, which is combined in a manner not shown with scissors.
  • FIG. 3 shows, as an additional thread securing device, a thread guide edge 35 which runs along the movement path of the winding finger 10 and which is formed on a stationary guide plate 36 which also carries an elastic end stop 37 for the urging bracket 33.
  • FIG. 2 also shows the drive mechanism, designated overall by reference number 20, for opening and closing the preselectable thread clamps 19, 19 'which are combined with thread scissors, but which will not be described in detail here. This mechanism is driven at the beginning of the working stroke of the drive cylinder 15 which, with its piston rod 15.1, moves a drive carriage 39 which can be seen in FIG. 1 and is longitudinally movable on a guide rod 38.
  • Fig. 5 shows the loop pivot lever 12 shown in Fig. 1 in its starting position in its operating position, in which it dips with its free end 12.1 into the slot 10.1 of the winding finger 10 designated in Fig. 3, after on the winding finger 10 from the new thread 30 'a closed thread loop 40 has been formed.
  • the knotting device assumes this position at time t5 of the time diagram in FIG. 4.
  • the loop pivot lever 12 has the shape of a curved lance, which is attached to one arm 42a of a two-arm pivot lever 42, the other of which, not shown in FIG. 5 Arm is coupled to the drive carriage 39 of the main drive cylinder 15.
  • a drive lever 43 In parallel to that Arm 42a and connected to it is a drive lever 43 which engages with its tip 43.1 in the spiral groove 44 of the tubular spiral cylinder 13 rotatable about its longitudinal axis (see also FIG. 1) and upon the pivoting movement of the loop pivot lever 12 a rotary movement of the spiral cylinder 13 causes.
  • the clamping hook 14 is fastened, which can be seen in detail in FIG. 6.
  • the lance-shaped loop pivot lever 12 is provided on its inside with an edge recess 45.
  • the thread loop 50 formed from the running old thread 30 runs between the upper thread guide groove 12.3 formed in the loop swivel lever 12 and a thread guide notch 10.4 (FIG. 8) formed in a lower nose 10.2 of the winding finger at a distance from the lower edge of the loop swivel lever 12.
  • FIG. 6 shows the clamping hook 14, which can be pivoted about the axis of rotation 46 of the spiral utility cylinder 13 and is drivingly coupled to the loop pivot lever 12 and is designed as a pivot lever. It is adjustably mounted in a plane running perpendicular to the swivel plane of the loop swivel lever 12 and is provided at its free end with a piercing tip 14.1 and a hook 14.2. With these parts, which are only indicated schematically in FIG. 5, it projects in the position of the loop pivot lever 12 shown in FIG. 5 through the transverse slot 10.3 of the winding finger 10 shown in FIGS. 2, 5 and 8 and through the recess 45 of the free one End 12.1 of the loop pivot lever 12 and thus also through the thread loop 50 formed from the running old thread.
  • the hook 14.2 is a movable one Assigned jaws 47 (Fig. 6, 11), which is connected to a shift rod 48 which is connected to the end of one arm of a two-armed pivot lever 49.
  • the pivot lever 49 is mounted on the pivotable clamping hook 14 so as to be pivotable about an axis 51 and carries on its other lever arm a control pin 52 which engages in a control groove 53 of a stationary control part 54.
  • 5 and 6 show the knotting device between the times t5 and t6 of the time diagram of FIG. 4 in a position in which the knot formation is prepared and from which the knot formation is triggered by a switching pulse supplied by the control part at the time t6.
  • the position of the individual knot organs is monitored by electro-optically or electromagnetically active sensors S1-S5 (FIGS. 1, 6). If one of these sensors does not respond, this means that the preparation position is faulty, and the triggering pulse for knot formation is not given by the control part.
  • a switch S1 is actuated by the rack 11 when the winding finger 10 is in its end position for pivoting the loop pivot lever 12 and the clamping hook 14.
  • a sensor S2 monitoring the loop pivot lever 12 detects its pivoting in.
  • a sensor S3 reports that the swivel lever 42 moves back when the knot is formed in order to trigger the compensator thread brake 21.
  • a sensor S4 influences the ball brakes 18, 18 '.
  • the thread changing device With its parts is in the position shown in FIG. 1.
  • the new thread guide 17 ' is still in its normal position, which is labeled “off” in FIG. 4.
  • the thread clamp 19 'for the new thread 30' is closed and holds the thread end 30a '.
  • the ball brake 18 'for the new thread 30' is open.
  • the winding finger 10 is in its initial position, which is labeled "off” in FIG. 4, as is the push bracket 33, the loop pivot lever 12 and the hook scissors 14.
  • the compensator thread brake 21 is open, the thread guide 17 of the old thread is located in its normal position, which is labeled "off", and the ball brake 18 for the old thread 30 is open, so that the thread 30 passes through the thread changing device without braking on the path shown in FIG. 1.
  • the preparation of the thread changing device for knot formation begins by moving the thread guide 17 'for the new thread 30' upward from the normal position (see FIG. 2).
  • FIG. 3 and 7 show the position of the winding finger 10 which can be rotated about the axis A and of the urging bracket 33 which cooperates with it at the time t2.
  • the push bracket 33 returns to its starting position. Up to this point, the winding finger 10 has made approximately 1 1/2 turns and has already almost completed the loop 40 from the new thread 30 '.
  • the ball brake 18 'through which the new thread 30' passes is partially activated so that a braking force is exerted on the new thread 30 '.
  • This braking position is designated "1/2" in the time diagram of FIG. 4. This braking effect of the ball brake 18 'on the new thread 30' ensures that the other end 30a 'held in the thread clamp 19' new thread 30 'is tightened during the remaining quarter turn of the winding finger 10 on the winding finger, so that the loop 40 formed by him lies precisely and tightly on winding finger 10.
  • the winding finger 10 remains in the position shown in FIG. 8. It can be seen from the time diagram in FIG. 4 that it is only turned back to its starting position shown in FIGS. 1 and 3 at time t12, that is to say after the knotting process has ended.
  • the position of the loop 40 on the winding finger can be seen from FIG. 8 also shows the thread guide notch 10.4 formed in the lower winding finger tip 10.2 and the transverse slot 10.3 of the winding finger 10. In this position, the new thread 30 'is still fixed, while the old thread 30 continues to run to the thread processing point via the centering part 29.
  • the reached position of the winding finger 10 is determined by the sensor S1 of the control part of the thread changing device, which then causes the knotting process to continue.
  • the loop pivot lever 12 is first pivoted into the operating position shown in FIGS. 5 and 6, and immediately thereafter the clamping hook 14 with its hook 14.2 is pivoted into the slot 10.1 or 10.3 of the winding finger 10.
  • the loop pivot lever 12 grasps the old thread 30 shortly before the centering part 29 with its free end 12.1 and places it when the free end 12.1 is immersed in the thread guide notch 10.4 in FIG. 8 in the lower tip 10.2 of the winding finger.
  • Fig. 9 shows this time of immersion of the free end 12.1 of the loop pivot lever 12. From Fig.
  • a loop wiping part 55 is shown, which engages with a nose in a longitudinal groove 12.2 of the loop pivot lever 12 and this ensures that when later pivoting back of the loop pivot lever 12, the loop 40 pulled from the winding finger 10 does not get caught on the loop pivot arm 12.
  • the compensator swivel arm 23 is locked in its position determining the maximum length of the compensation path by immersing the coupling bolt 25 in the guide slot 26 'of the control plate 26.
  • the thread reserve held here can be released between times t8 and t10.
  • FIG. 10 also shows the clamping hook 14 pivoted into the winding finger 10, the hook 14.2 in the region of the recess 45 of the loop pivot lever 12 designated in FIG. 5 by the loop 50 running over the free end 12.1 of the loop pivot lever 12 (FIG. 5) of the old thread 30 has passed through and has gripped the end section 30b 'of the resting second thread 30' which is still held in its clamp 19 'by its end 30a'.
  • the first thread 30 continues to run to the thread processing point. In this state, in which a loop 50 (FIG.
  • the knotting device is ready for the knotting process.
  • the sensors S1, S2 of the control part of the thread changing device are used to check whether the device parts have all assumed the position specified in them and shown in FIG. 10.
  • the subsequent knotting process then becomes a calculated one correct time t6 triggered by a control signal given to the drive devices of the knotting device.
  • the clamping hook 14 is brought into a "clamping" position, which according to FIG. 6 occurs when the clamping hook 14 is pivoted counterclockwise in the control curve region 53.2, and the loop pivot lever 12 is pivoted back out of the winding finger 10 .
  • the end section 30b 'of the second thread 30' is clamped between the hook 14.2 and the clamping jaw 47 of the clamping hook 14.
  • the ball brake 18 'for the new thread 30' is switched to its full braking position, so that no new thread 30 'can be pulled through the thread guide 17'.
  • the clamping hook 14 pulls the end portion 30b 'of the new thread 30' through the loop 50 of the old thread 30 and through the loop 40 of the new thread 30 '.
  • the thread clamp 19 ' is opened at time t7, so that it releases the end 30a' of the new thread 30 'which was previously clamped there.
  • the return movement of the loop pivot lever 12 and the clamping hook 14 is controlled by means of the main drive cylinder 15 shown in FIG. 1.
  • the drive cylinder 15 When the drive cylinder 15 is reversed, compressed air that is released is fed into the blowing nozzle 16 acting as a thread drive device, through which the old thread 30 is passed.
  • the compressed air released during venting can be directed to cleaning nozzles 58 directed at organs of the knotting device.
  • the old thread 30 is driven in the thread running direction, thereby achieving a rapid and controlled regression of the thread loop 50 which dissolves again when the loop pivoting lever 12 is withdrawn from the winding finger 10.
  • the old thread 30 at the now knot formation held taut. There is no dependency on whether the old thread 30 is running at full speed at this point in time or only at low speed when the knitting machine is running slowly, or whether the old thread 30 is possibly at this moment.
  • the blow nozzle 16 works only for a short time and transmits a drive pulse that flattens out at the time t8 and t9.
  • the compensator thread brake 21 is then actuated for a short time, up to time t10, in accordance with the time diagram in FIG. 4, and the running of the old thread 30 is thus briefly interrupted.
  • the main drive cylinder 15 has released the coupling bolt 25 in the control plate 26 at this time, so that old thread 30 can still be delivered to the thread processing point from the fixed compensation path formed on the compensator swivel arm 23 with the deflection roller 24.
  • the loop pivot lever 12 continues to decrease, the loop stripping part 55 shown in FIG. 9 taking effect.
  • the hook scissors 14 pulls on the end region 30b 'of the new thread 30' which is pulled through the loop 50 and the loop 40 during their pivoting back movement in the effective range of the control curve 53 shown in FIG. 6.
  • 11 shows the knot formation approximately at time t9. At this time, the thread clamp 19 for the old thread 30 is closed, the old thread 30 being cut off and its end clamped in the clamp 19. Its cut end is designated 30.1 in Fig. 11.
  • the moved-back clamping hook 14 tightens the knot 60, a thread loop 56 forming from the end section 30b 'of the new thread 30', which is cut open in the control curve section 53.3 shown in FIG. 6 by the clamping jaw 47, which is also a shear jaw.
  • the clamping hook 14 has reached its end position and cut the loop 56 open.
  • the ball brake 18 'for the new thread 30' is now fully opened again, so that the new thread 30 'knotted on the old thread 30 can run freely.
  • the compensator thread brake 21 is opened again.
  • the knot 60 and behind it the new thread 30 'can continue to the thread processing point, where the knot appears exactly at a desired knitted part.
  • the thread guide 17 ' is moved back into its starting position, that is to say into the position which the thread guide 17 has already assumed for the old thread 30 in FIGS. 9 to 11.
  • the running new thread 30 ' is moved completely out of the swivel range of the winding finger 10, so that the winding finger can then be moved back from its position shown in FIGS. 9 to 11 back to its starting position shown in FIGS. 1 and 3 at time t12 .
  • the knotting device is again in a starting position, from which a new knotting process can be initiated again.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (15)

  1. Changeur de fil, pour des métiers à tricoter notamment, avec un dispositif de nouage pour nouer un nouveau fil (30') sur un ancien fil (30) lors d'un changement de fil, avec des pinces (19, 19') et des organes de coupe (19, 14, 47) pour le nouveau fil (30') et l'ancien fil (30), le dispositif de nouage se composant d'un doigt d'enroulement (10), qui intercepte le nouveau fil (30) et le dispose en une boucle fermée (40), d'un levier pivotant de bouclage (12), qui introduit l'ancien fil (30) sous forme de boucle ouverte (50), pendant le défilement des fils, dans la boucle (40), et d'un crochet de serrage mobile (14), qui s'engage au travers de la boucle (50) et intercepte l'extrémité (30b') du nouveau fil (30'), caractérisé en ce qu'une section de compensation de fils d'une longueur maximale définie, passant par un bras pivotant à ressort (23), est prévue dans le sens de tirage des fils, en aval du dispositif de nouage, ainsi qu'un tendeur-compensateur (21) placé en avant et pouvant être actionné temporairement, en fonction de la position du crochet de serrage mobile (14) et/ou du levier pivotant de bouclage (12), et en ce que le crochet de serrage (14) est combiné à un ciseau (47) pour couper le nouveau fil (30').
  2. Changeur de fil suivant la revendication 1, caractérisé en ce qu'un dispositif d'entraînement des fils (16), qui peut être actionné temporairement, est disposé, dans le sens de tirage des fils, entre le dispositif de nouage et le tendeur-compensateur (21).
  3. Changeur de fil suivant la revendication 2, caractérisé en ce que le dispositif d'entraînement des fils est une buse soufflante (16), au travers de laquelle passe le fil (30).
  4. Changeur de fil suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que les fils sélectifs (30') sont respectivement dirigés vers le doigt d'enroulement (10) par un tendeur (18), dont la force de serrage peut être modifiée en fonction de la position de l'un des organes, au moins, du dispositif de nouage.
  5. Changeur de fil suivant la revendication 4, caractérisé en ce que le tendeur (18) est réalisé sous forme de tendeur sphérique, doté d'une possibilité d'influence électromagnétique.
  6. Changeur de fil suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que le dispositif de nouage est muni en supplément d'organes de protection des fils, à effet mécanique, qui englobent un étrier de poussée (33), mobile en direction du doigt d'enroulement (10) et agissant sur le nouveau fil (30'), et une arête de guidage de fils stationnaire (35), située le long d'une section de la trajectoire du doigt d'enroulement (10).
  7. Changeur de fil suivant la revendication 6, caractérisé en ce que le levier pivotant de bouclage (12) présente une rainure longitudinale (12.2), dans laquelle s'engage un élément de tirage de boucle (55) stationnaire.
  8. Changeur de fil suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le levier pivotant de bouclage (12) et/ou le crochet de serrage (14) concourent avec un capteur, au moins, d'un élément de commande du changeur de fil.
  9. Changeur de fil suivant la revendication 3 et l'une quelconque des revendications 1 à 8, caractérisé en ce que le doigt d'enroulement (10), au moins, le levier pivotant de bouclage (12), et le crochet de serrage (14), peuvent être déplacés, au moyen d'un cylindre de commande pneumatique (15), au moins, de leur position de repos dans une position de service, et inversement, et en ce que l'air sous pression, dégagé lors du désaérage du cylindre de commande, est envoyé dans la buse soufflante (16), au moins, au travers de laquelle passe le fil (30).
  10. Changeur de fil suivant la revendication 9, caractérisé en ce que l'air sous pression, dégagé lors du désaérage du cylindre de commmande (15), est envoyé dans des buses de nettoyage (58), dirigées sur des organes du dispositif de nouage.
  11. Changeur de fil suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que le crochet de serrage (14) peut se déplacer le long d'une came de commande (53) stationnaire, agissant sur sa pince (47) et sur le ciseau combiné à ce crochet.
  12. Changeur de fil suivant l'une quelconque des revendications 1 à 11, caractérisé en ce que le levier pivotant de bouclage (12), en position de service, s'applique par son extrémité libre (12.1), munie d'une rainure de défilement de fil (12.3) pour l'ancien fil (30), contre une butée (57), protégeant la boucle (40) sur le doigt d'enroulement (10) du risque de glissement, de sorte que sa rainure de défilement (12.3) est recouverte en un canal fermé de passage de fil.
  13. Changeur de fil suivant l'une quelconque des revendications 1 à 12, caractérisé en ce qu'un crochet (14.2), prévu sur l'extrémité libre du crochet de serrage (14), concourt avec une mâchoire de serrage mobile (47), qui est simultanément une mâchoire de coupe, et est couplé, par l'intermédiaire d'une tige de commande (48), avec un levier pivotant (49) commandé par came, monté sur le crochet de serrage (14).
  14. Changeur de fil suivant l'une quelconque des revendications 1 à 13, caractérisé en ce que le bras pivotant (23), déterminant la section de compensation, peut être verrouillé dans la position pour la longueur maximale définie, en fonction de la position du crochet de serrage (14) et/ou du levier pivotant de bouclage (12) (tiroir de verrouillage 26).
  15. Procédé pour la formation de noeuds dans un changeur de fil suivant les revendications 2, 4 et 6, et suivant l'une quelconque des revendications 3 à 14, par interception d'un nouveau fil, sélectionné, par le doigt d'enroulement, formation d'une boucle fermée du nouveau fil sur le doigt d'enroulement, introduction d'une boucle ouverte de l'ancien fil dans la boucle du nouveau fil au moyen du levier pivotant de bouclage et engagement du crochet de serrage au travers de la boucle ouverte de l'ancien fil, interception de l'extrémité du nouveau fil par le crochet de serrage et tirage consécutif de l'extrémité de fil au travers de la boucle de l'ancien fil, et mouvement de retour du levier pivotant de bouclage, caractérisé par les phases de procédé supplémentaires suivantes:
    a) Déplacement vers l'intérieur de l'étrier de poussée (33) en direction du doigt d'enroulement (10), lors de la formation de la bouche (40).
    b) Activation du tendeur (18') pour le nouveau fil (30'), avant l'achèvement de la formation de la bouche (40).
    c) Fixation de la section de compensation de fils dans sa longueur maximale, avant le début de la formation de noeuds proprement dite (t6).
    d) Lors du mouvement de retour du levier pivotant de bouclage (12) et du crochet de serrage (14), pendant la formation de noeuds proprement dite, sur une partie au moins de la trajectoire de déplacement, commutation du tendeur (18') pour le nouveau fil (30') sur serrage à fond, et activation simultanée et temporaire du dispositif d'entraînement des fils (16), disposé entre le dispositif de nouage et le tendeur-compensateur (21) dans le sens de défilement des fils.
    e) Dans une zone extrême de la trajectoire de retour du crochet de serrage (14), fermeture temporaire, dans un premier temps, du tendeur-compensateur (21), puis coupe du nouveau fil (30') au moyen du ciseau (élément 47) combiné au crochet de serrage (14).
    f) Après la fermeture du tendeur-compensateur (21), dégagement du bras pivotant compensateur (23) de la section de compensation de fils.
EP88115433A 1987-10-07 1988-09-21 Dispositif changeur de fil, notamment pour des métiers à tricoter Expired - Lifetime EP0310857B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873733796 DE3733796A1 (de) 1987-10-07 1987-10-07 Fadenwechseleinrichtung, insbesondere fuer strickmaschinen
DE3733796 1987-10-07

Publications (3)

Publication Number Publication Date
EP0310857A2 EP0310857A2 (fr) 1989-04-12
EP0310857A3 EP0310857A3 (fr) 1992-01-15
EP0310857B1 true EP0310857B1 (fr) 1994-07-27

Family

ID=6337740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115433A Expired - Lifetime EP0310857B1 (fr) 1987-10-07 1988-09-21 Dispositif changeur de fil, notamment pour des métiers à tricoter

Country Status (7)

Country Link
US (1) US4984436A (fr)
EP (1) EP0310857B1 (fr)
JP (1) JPH0815985B2 (fr)
KR (1) KR910003887B1 (fr)
DD (1) DD282933A5 (fr)
DE (1) DE3733796A1 (fr)
ES (1) ES2060633T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2614775B2 (ja) * 1990-03-03 1997-05-28 松崎工機株式会社 編成或いは織製時における給糸装置
FR2751352B1 (fr) * 1996-07-16 1998-10-16 Artechnic Dispositif pour effectuer la jonction entre un fil en cours de tricotage et un fil selectionne a tricoter destine a une machine a tricoter
FR2755116B1 (fr) * 1996-10-31 1999-04-02 Lelong Bonnaric Jean Claude Procede de ligature par entrelacement autoserre et attache de suspension a l'unite ou en duo
KR100365125B1 (ko) * 1998-03-02 2003-08-02 장병인 방직기의 실 공급장치
JP4885370B2 (ja) * 2000-06-16 2012-02-29 株式会社ブリヂストン 印刷装置、及び印刷方法
JP2002035460A (ja) * 2000-07-28 2002-02-05 Brother Ind Ltd 糸結び方法及びその装置
EP3822207B1 (fr) * 2019-11-12 2023-11-08 Karl Mayer Rotal Srl Agencement de nouage de cordes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123014A (en) * 1977-03-21 1978-10-31 Milliken Research Corporation Yarn tension control
DE3015191C2 (de) * 1980-04-19 1983-03-03 Schaffhauser Strickmaschinenfabrik, Schaffhausen Fadenwechselvorrichtung für Textilmaschinen, insbesondere Rundstrick- und Rundwirkmaschinen
WO1982003642A1 (fr) * 1981-04-16 1982-10-28 Jacobsson Kurt Arne Gunnar Procede d'alimentation en fils de differentes couleurs d'une machine a tricoter, et machine a tricoter pour la mise en oeuvre du procede
CH643015A5 (fr) * 1981-12-03 1984-05-15 Mayer & Cie Maschinenfabrik Metier a tricoter.
DE3239495C2 (de) * 1982-10-26 1985-01-17 SIPRA Patententwicklungs-und Beteiligungsgesellschaft mbH, 7000 Stuttgart Kugelbremse für Textilfäden
CH664776A5 (fr) * 1985-06-21 1988-03-31 Stoll & Co H Dispositif de selection de fils pour metier a tricoter.

Also Published As

Publication number Publication date
EP0310857A3 (fr) 1992-01-15
EP0310857A2 (fr) 1989-04-12
DE3733796C2 (fr) 1991-05-02
DD282933A5 (de) 1990-09-26
KR890006890A (ko) 1989-06-16
JPH01122878A (ja) 1989-05-16
ES2060633T3 (es) 1994-12-01
US4984436A (en) 1991-01-15
DE3733796A1 (de) 1989-04-20
JPH0815985B2 (ja) 1996-02-21
KR910003887B1 (ko) 1991-06-15

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