EP0685585A1 - Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase - Google Patents

Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase Download PDF

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Publication number
EP0685585A1
EP0685585A1 EP94810640A EP94810640A EP0685585A1 EP 0685585 A1 EP0685585 A1 EP 0685585A1 EP 94810640 A EP94810640 A EP 94810640A EP 94810640 A EP94810640 A EP 94810640A EP 0685585 A1 EP0685585 A1 EP 0685585A1
Authority
EP
European Patent Office
Prior art keywords
weft thread
weft
thread
shed
conveying
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.)
Granted
Application number
EP94810640A
Other languages
German (de)
English (en)
Other versions
EP0685585B1 (fr
Inventor
Urs Schaich
Rolf Benz
Marcel Christe
Goran Dokic
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.)
Itema Switzerland Ltd
Maschinenfabrik Rueti AG
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Priority to EP19940810640 priority Critical patent/EP0685585B1/fr
Publication of EP0685585A1 publication Critical patent/EP0685585A1/fr
Application granted granted Critical
Publication of EP0685585B1 publication Critical patent/EP0685585B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
    • D03D41/005—Linear-shed multiphase looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/368—Air chamber storage devices

Definitions

  • the invention relates to a device and a method for correcting irregularities when entering a weft thread in a weaving rotor of a row shed weaving machine, in particular for repairing weft thread breaks as well as weft threads that are incompletely entered or damaged in the shed, according to the preamble of claim 1.
  • the invention also relates a row shed weaving machine with the device according to the invention.
  • the invention further relates to a row shed weaving machine operated with the method according to the invention.
  • EP 0 445 489 A1 discloses a metering device for delivering weft thread to a row shed weaving machine, in which a metering roller pulls the weft thread from an upstream thread supply and feeds it to a weaving machine, the metering roller being wrapped several times by weft thread in order to bring about a sufficiently high static friction so that the take-off speed or the conveying speed of the weft thread is determined by the speed of rotation of the metering roller.
  • This known metering device is also able to automatically thread the weft thread when it is re-equipped with a supply spool and inevitably bring the new weft thread into a starting position that is advantageous for weaving.
  • the known metering device has the disadvantage that in the event of an irregularity in the insertion of the weft thread, for example in the event of a thread breakage or if the weft thread is not completely inserted into the shed, the weaving process has to be interrupted and the weft thread has to be removed from the thread paths or the shed by hand. The troubleshooting requires manual intervention by the operating personnel and causes longer downtimes of the weaving machine.
  • the invention has for its object to provide a device and a method for the delivery of weft to the weaving rotor of a series shed weaving machine, which avoid the disadvantages mentioned, which in particular allow an interruption of the weaving process due to an irregularity in the weft insertion to be remedied automatically.
  • this object is achieved with a device according to the characterizing features of claim 1.
  • the dependent claims 2 to 16 relate to further advantageous embodiments of the invention.
  • the object is further achieved in that the device according to the invention is operated with methods according to the characterizing features of claims 17 to 20.
  • the dependent claims 21 and 22 relate to further advantageous method forms of the invention.
  • An advantage of the invention is that the metering device is preceded by a thread store for the weft thread, or that the metering device also serves as a thread store, the stored thread length corresponding to at least one weaving width, so that in the event of a weft thread breakage occurring between the metering roller and the bobbin a weft end of a bobbin (empty bobbin) the weft thread can still be fully inserted into the shed before the weaving process has to be interrupted.
  • the metering device can be actuated counter to the entry direction of the weft thread, which makes it possible for the metering device to automatically withdraw a weft thread that has not yet been completely inserted into the shed, or a weft thread that has not yet been cut on the weft insertion side and dispose of.
  • FIG. 1 a shows a device 1 for eliminating irregularities when a weft thread is inserted into a weaving rotor of a row shed weaving machine.
  • the device serves, in particular, as a metering device 1 or a weft error correction device 1, in order to pull a weft thread 7 from a supply unit 2 and to deliver it to the weaving machine in a manner adapted to the weaving cycle.
  • the supply unit 2 pulls the weft thread 7 from one coil, not shown, and passes this via an eyelet 24b to a fluid-loaded suction nozzle 25.
  • the supply unit 2 has one or more weft feed devices 20a which hold the beginning of the weft thread 7a, 7b of further bobbins.
  • the ready-made weft thread 7a runs through the eyelet 24a and is pivotably held in the weft thread holding tube 22a via a swivel arm 21a. If there is a need to feed the weft 7a to the weaving machine, then the swivel arm 21a is pivoted into the position shown in dashed lines and the weft holding tube 22a is supplied with a fluid from the weft nozzle 23a, so that the weft thread 7a is gripped by the suction nozzle 25 and by the subsequent units the metering device 1 is entered.
  • a further weft thread 7b can be kept ready in exactly the same way with further weft thread feed devices 20a such as the swivel arm 21b with a weft thread holding tube 22b and a weft nozzle 23b.
  • the suction nozzle 25 conveys the weft thread 7 through an opened thread brake 3 to a weft thread conveying device 4 with a weft nozzle 41.
  • the weft thread brake 3 is formed from two pivotable guide surfaces 31a which touch each other in the closed state 31b and thereby have a clamping and braking effect exert on the weft 7.
  • the guide surfaces 31a located in an open position can additionally influence the trajectory of the weft thread 7 towards the firing nozzle 41.
  • the following weft conveying device 4 has the task of conveying the weft 7 in the weft insertion direction 7e and also opposite to this insertion direction.
  • the shooting nozzle 41 and a catch nozzle 42 opposite in the weft insertion direction 7e define a weft axis 8 along which a weft thread 7 is inserted into the weft thread conveying device 4.
  • a deflection device 43 with a drive device 43a, lever arm 43b and eyelet 43c is arranged directly in front of the catching nozzle 42.
  • the eyelet 43c lies in the insertion axis 8, so that the weft thread 7 is carried by the eyelet 43c and then penetrates into the catching nozzle 42 and further into the conveying channel 42a.
  • the weft thread conveying device 4 has a conveying roller 40 between the insertion nozzle 41 and the catching nozzle 42, which has a support surface in the circumferential direction on which the weft thread 7 comes to rest. In the conveyor operation, the contact surface is wrapped several times by the weft thread 7.
  • the support surface is formed by support elements 48 that are regularly spaced apart from one another in the direction of rotation.
  • the ends of the support elements 48 open into an edge element 402, which has one or more spaced-apart catch lugs 49 on its outer circumference, which form a catch region 44.
  • the conveyor roller 40 is rotatable both in a direction of rotation 45a in order to feed a weft thread 7 to a weft processing unit 6 and in a direction of rotation 45b in order to withdraw a weft thread 7 from the weft processing unit 6.
  • the individual turns of the weft thread 7 usually lie next to one another on the support surface of the conveyor roller 40, so that the length of the stored weft thread supply can be determined and monitored by an optical sensor 46 by measuring the winding width of the stored weft thread 7.
  • the weft thread conveying device 4 is followed in the weft insertion direction 7e by a separating and deflecting device 5, which consists of a weft thread cutting device 51 and a deflecting device 52.
  • the deflector 52 can be moved back and forth with a drive device in the direction of movement 52a, so that either a conveying channel 53a comes to lie in the insertion axis 8 in order to guide a weft thread 7 to be inserted into the subsequent weft processing unit 6, or an angled conveying channel 53b comes into the insertion axis 8 to lie in order to feed a weft thread 7 conveyed in the weft insertion direction 7e to a waste container 55.
  • the separating and deflecting device 5 is followed in the direction of the shooting axis 8 by a shot processing unit 6, of which a transport nozzle 60 and a delivery channel 61 are shown.
  • the conveyor channel 61 opens into a weft distributing device 9, which feeds the weft 7 to an open shed of a row shed loom (FIG. 4).
  • the insertion axis 8 advantageously extends from the suction nozzle 25 to the transport nozzle 60.
  • FIG. 1b shows a top view of the conveyor roller 40 of the weft conveyor 4.
  • the insertion axis 8 has an angle of inclination alpha to the axis of rotation 47 of the conveyor roller 40 and has a minimum distance from the contact surface of the conveyor roller 40.
  • the minimum distance from the contact surface for the weft thread 7 is designed such that the fluid jet of the shooting nozzle 41 is deflected only insignificantly by the elements 48 forming the contact surface.
  • the sequence for an automatic winding of the conveyor roller 40 with weft thread 7 is described on the arrangement according to FIG. 1b.
  • a weft thread 7 is carried by the shooting nozzle 41 along the shooting axis 8 through the eyelet 43c of the deflection device 43 and then into the opening of the catching nozzle 42 and continues through the conveying channel 42a.
  • the angled conveying channel 53b lies in the insertion axis 8, so that the weft thread is inserted 7 reaches the waste container 55.
  • the catch nozzle 42 remains exposed to a fluid and causes a force acting on the weft 7 in the weft insertion direction 7e.
  • the lever arm of the deflection device 43 is moved from the bullet position 43e into a winding position 43d by a movement in the pivoting direction 43f.
  • the weft thread 7 comes into contact with the edge element 402, so that the weft thread 7, through the conveyor roller 40 rotating in the direction of rotation 45a, arrives in a catching area 44 and is held by a catch nose 49, so that weft thread 7 increases due to the further rotating conveyor roller 40 the support surface of the conveyor roller 40 is wound up and thus a wound weft thread 7d is formed.
  • this is stopped and the deflection device 43 is brought from the winding position 43d into the weft position 43e.
  • the weft thread 7 is removed from the catch nose 49 and the conveyor roller 40 is thus ready to convey the weft thread 7.
  • the contact surface of the conveyor roller 40 is designed such that a large number of turns of the weft thread 7 can be applied.
  • the conveyor roller 40 thus simultaneously performs the function of a thread store, the thread length stored on the conveyor roller corresponding to at least one weaving width or the width of a weft insertion of the subsequent weaving machine.
  • FIG. 1c shows a further top view of the weft thread conveying device 4 with conveying roller 40.
  • the insertion nozzle 41 and catching nozzle 42 held by supporting elements 400, 401 define the insertion axis 8.
  • the center of rotation 47a of the axis of rotation 47 of the conveying roller 40 has an angle alpha with respect to the insertion axis 8 that is less than 90 degrees.
  • the size of the angle alpha depends on the design of the contact surface of the conveyor roller 40 and on the length or the number of turns of the weft thread 7 to be stored on the conveyor roller 40 and on the yarn thickness.
  • the contact surface of the conveyor roller 40 consists of a conical area 403, which tapers from the side of the axis of rotation 47 towards the edge element 402, tapering over a width d, and tapers into an area 404 of width c, which is approximately parallel to the center of rotation 47a runs.
  • the widths c and d of the areas 403 and 404 and the angle of inclination beta between the areas 403 and 404 depend, inter alia, on the length of the weft thread 7 to be stored and on the nature of the weft thread 7.
  • the conveyor roller 40 conveys the weft thread 7 in the direction of rotation 45a respectively in the weft insertion direction 7e, the front part of the weft thread 7 in the weft insertion direction 7e is continuously drawn off from the support surface of the conveyor roller 40 and passed on to the separating and deflecting device 5 via the catching nozzle 42.
  • the aim here is to ensure that the individual turns of the wound weft thread 7d lie next to one another without ever crossing each other in such a way that the weft thread 7 supplied by the supply unit comes to lie on the conical part 403, and the drawn-off weft thread 7 in the cylindrical part 404, the edge element 402 facing, comes to rest.
  • the individual turns of the weft thread 7 thus slide against the edge element 402 on the support surface in the direction of the axis of rotation 47a before the turn is lifted again and the weft thread 7 is passed on through the catching nozzle 42.
  • slip between the turns of the weft thread 7 and the contact surface of the conveyor roller 40 should be avoided as far as possible.
  • the conveying roller 40 thus also serves as a metering device for the weft thread 7, in that the conveyed length of the weft thread 7 can be determined on the basis of the number of revolutions of the conveying roller 40.
  • the outer surface The contact surface should therefore exert a sufficiently large static friction in the direction of rotation 45a, 45b on the stored weft thread 7 in order to avoid slipping in the direction of rotation, at the same time the static friction in the direction 47a of the axis of rotation should be relatively small so that the individual turns of the weft thread 7 on the Slide the support surface in the direction of 47a.
  • the individual turns of the weft thread 7, particularly in the conveying operation in the direction of rotation 45a lie close to one another, the turns lying in the conical area 403 causing a force acting in the direction 47a towards the edge element 402, so that the turns lying in the area 404 continuously in the direction of the edge elements 402 are pushed.
  • the sliding friction between the weft thread 7 and the contact surface is advantageously to be chosen such that the individual turns remain next to one another and are not pushed over one another.
  • the configuration of the shape and the surface condition of the contact surface of the conveyor roller 40 is of central importance so that a larger number of turns of the weft thread 7 can be stored, such that the weft thread 7 can be removed again unhindered during the conveying operation, and such that the conveyor roller 40 also serves as a metering device to determine the length of the inserted weft thread 7.
  • the support surface of the conveyor roller 40 is formed by support elements 48 which are regularly spaced in the direction of rotation 45a.
  • This embodiment causes a small static and sliding friction for movements in the direction of the axis of rotation 47a and a sufficiently large static friction in the direction of the direction of rotation 45a on the weft thread 7 lying thereon. It can however, depending on the properties of the weft thread 7, it may prove advantageous to design the support surface of the conveyor roller 40 as a continuously closed jacket surface or to provide the jacket surface with openings, for example, in places.
  • the behavior of the weft thread 7 on the conveyor roller 40 can be further influenced by a suitable choice of the angles alpha and beta and by the widths c and d of the areas 403 and 404.
  • the lever arm 43b of the deflection device 43 is brought into the winding position 43d, the conveyor roller 40 begins to rotate in the direction of rotation 45a, and the contact surface of the conveyor roller 40 is covered with the required number of turns.
  • the weft thread 7 remains largely held by the catch nozzle 42, so that the weft thread 7 is supplied by the supply unit 2 during winding.
  • the deflection device 43 is brought into the weft position 43e, the weft thread 7 is cut by the weft thread cutting device 51 and the conveying channel 53a of the deflection device 52 into the Shooting axis 8 brought.
  • the conveyor roller 40 then begins to rotate in the direction of rotation 45a and the weft thread 7 is fed to the weaving machine via the weft preparation unit 6.
  • the conveyor roller 40 determines the speed of the weft thread 7 in the weft insertion direction 7e and synchronizes the weft thread insertion into the weft preparation unit 6 with the weaving cycle of the weaving machine.
  • the weft thread 7 is advantageously fed continuously to the weft processing unit 6. If a weft thread interruption now occurs between a bobbin of the supply unit 2 and the weft thread conveying device 4, for example caused by a weft thread breakage or by the thread end of a bobbin, this is determined with the aid of a sensor 46.
  • the sensor 46 detects that the width of the wound weft thread 7d falls below an adjustable minimum dimension. As soon as a weft thread interruption is determined, the conveyor roller 40 continues to deliver from the weft thread 7 stored on the conveyor roller 40 until a complete weft thread insertion has taken place over the entire weaving width of the weaving machine. Then the weft thread 7 is cut at the entry-side end of the weaving machine and the weaving machine is stopped. Since the width of the wound weft thread 7d decreased, the end of the weft thread 7 must lie on the conveyor roller 40. The weft thread 7 remaining in the weft preparation unit 6 is withdrawn by the conveyor roller 40, which now rotates in the direction of rotation 45b, until the weft thread tip lies behind the weft thread cutting device 51.
  • the deflection device 52 is then reversed so that the conveying channel 53b comes to lie in the shooting axis 8.
  • the conveyor roller 40 then rotates in the direction of rotation 45a, and the remaining weft thread 7 is conveyed into the waste container 55.
  • the metering device is thus of thread remnants free and is ready for a new, automatic threading process.
  • the weaving machine is brought to a standstill in such a way that the weft thread has not yet been cut on the insertion side.
  • the conveyor roller 40 is then actuated in the direction of rotation 45b and the weft thread 7 located in the shed is withdrawn and temporarily stored on the conveyor roller 40.
  • the deflection device 52 is reversed and the weft thread 7 located on the conveyor roller 40 is disposed of in the waste container 55. A new weft thread 7 is then automatically threaded in by the method already described.
  • the metering device shown in FIG. 1d has a weft thread conveying device 4 and a weft thread store 4a arranged upstream in the thread running direction 7e.
  • the storage device 4b is designed as a tube, a fluid nozzle 4c arranged above the upper tube opening allowing the weft thread 7 to dip into the storage device 4b, and a sensor 46 detecting the stored thread length.
  • the weft conveyor 4 following the weft store 4a determines the conveying direction of the weft 7 by slightly pinching the weft by two counter-rotating conveyor rollers 40 in such a way that slippage between the conveyor roller 40 and weft 7 is avoided as far as possible, so that the number of rotations of a conveyor roller 40 means that entered length of the weft thread 7 can be determined. Otherwise apply for this embodiment, the comments already set forth in Fig. 1a. A thread length which corresponds to one to two weaving widths of the subsequent weaving machine is advantageously stored in the storage device 4b.
  • the weft 7 is cut in the weaving machine, for example, on the weft insertion side, which in turn produces a weft tip with a precisely defined position.
  • the metering device 1 then withdraws the weft thread 7 from the weft processing unit 6, the retracted length of the weft thread 7 being detectable by the rotation of the conveying device 40, so that the weft thread tip can be positioned, for example, exactly in front of the separating and deflecting device 5.
  • the schematic exemplary embodiment of a separating and deflecting device 5 shown in FIG. 2a has a conveying channel 42a, through which a weft thread 7, conveyed with a fluid stream, is moved to the outlet opening 42b. Furthermore, two conveying channels 53a, 53b with inlet openings 53c, 53d are shown, through which the weft thread 7 can be conveyed further.
  • An entry opening 53c, 53d, which is arranged approximately opposite the exit opening 42b to receive a weft thread 7, is referred to as a positioned entry opening 57.
  • the outlet opening 42b and the positioned inlet opening 57 receiving the weft thread 7 are at a distance 57a of the width S.
  • the fluid emerging from the outlet opening 42b forms a free fluid flow 54a with a main flow direction 54b in the intermediate space 57a.
  • the outlet opening 42b of the conveying channel 42a and one of the inlet openings 53c, 53d are each to be displaced relative to one another in such a way that a weft thread 7 emerging from the outlet opening 42b is influenced by the free fluid flow 54a, into which the respectively positioned inlet opening 57 arrives.
  • a portion of the free fluid flow 54a also reaches the delivery channel 53a, 53b via the entry opening 53c, 53d and conveys the weft thread 7 through the respective delivery channel 53a, 53b.
  • the width S of the distance 57a is at least designed such that the cutting parts 51b, 51c of a cutting device 51 can penetrate between the gap 57a in order to cut through a weft thread 7 located in the gap 57a.
  • a scissor-like cutting device 51 with two intersecting cutting surfaces 51b, 51c is shown in the present exemplary embodiment.
  • Scissor-like cutting devices 51 usually have cutting surfaces that are easy on one another are set so that there is a punctiform cutting point.
  • Such scissors have a relatively large cutting force, so that different, difficult to cut or very thin weft threads 7 can be cut without problems.
  • a further advantage of such a pair of scissors 51 is that the contamination which occurs is low since there are no surfaces lying on it, and the dirt can be removed by the free fluid flow 54a.
  • the cutting device 51 is actuated by a drive device 51a.
  • the delivery channel 42a to be supplied and the two delivery channels 53a, 53b which are to be delivered must be displaceable relative to one another.
  • the two delivery channels 53a, 53b are held together by a holder 56 which can be displaced in the direction of movement 52a and can be displaced by a drive device 56a.
  • a wide variety of movement directions 52a, for example also circular, are possible in order to move an entry opening 53c, 53d into the position of a positioned entry opening 57.
  • the minimum distance of the gap 57a between the outlet opening 42b and the positioned inlet opening 57 is given by the dimension of the cutting parts 51b, 51c of the cutting device 51.
  • the gap width S can also be chosen to be larger, the gap width also being individually adjustable, for example, for each conveyor channel 53a, 53b, in that the conveyor channels 53a, 53b, 42a can be moved back and forth in the direction of displacement 53e, 53f, 42c, and thus result in different gap widths S1, S2.
  • the amount of free fluid flow 54a that enters the positioned inlet opening 57 and flows further through the adjoining delivery channel 53a, 53b is as a function of the distance S.
  • the relative amount of fluid in the subsequent delivery channel 53a, 53b or the fluid loss in the gap S can thus be set.
  • the loss of fluid in the gap S can make a significant contribution to keeping the surroundings of the inlet opening 53c, 53d clean, in that the loss of fluid flows outward and conveys contaminating parts.
  • the separating and deflecting device 5 can be adjusted for a wide variety of weft thread properties through the possibility of varying the gap width S.
  • thin yarns have the property that the weft thread tip can lie in a larger area after exiting from the exit opening 42b, so that the gap width S is set to be small in order to ensure reliable threading into the positioned entry opening 57.
  • the inlet and outlet openings 42b, 53c, 53d and the conveying channels 42a, 53a, 53b can have different cross-sectional areas, so that the amount of air transferred or a safe threading of the weft thread into the inlet opening 57 can also be influenced via the cross-sectional area.
  • the device according to the invention can be easily expanded in such a way that one of a plurality of outgoing delivery channels 53a, 53b can be brought into the position of a positioned inlet opening 57. It can thus be switched to a plurality of delivery channels 53a, 53b.
  • Figures 2b - 2e always show the same side view of an embodiment of a separating and Deflection device in which the weft thread cutting device 51 and the deflection device 52 are driven by a common drive device 56a.
  • FIG. 2b shows a drive device 56a which is rigidly connected to a holding device 58.
  • the holding device 58 has a rigidly connected cutting edge 51f with a cutting surface 51b and an opening for a conveying channel 42a and also a bore 51d for a pivot axis of the cutting device.
  • FIG. 2c shows a movable holder 56 for the two delivery channels 53c, 53d.
  • the holder 56 also has a connecting element 56b to the drive device 56a and a connecting element 56c to the cutting edge 51g with a cutting surface 51c.
  • FIG. 2d shows the movable cutting edge 51g with cutting surface 51c and a bore for receiving the pivot axis 51d of the cutting edge 51g. Furthermore, an articulated force transmission means 51e is shown, which is connected to the movable holder 56 via the connection 56c.
  • FIGS. 2b-2d shows the components shown individually in FIGS. 2b-2d as a whole in their operative connection.
  • the cutting edge 51g is pivotally connected to the holding device 58 via the pivot axis 51d in the direction of movement 52b. Furthermore, the cutting edge 51g is connected to the holder 56 via the articulated force transmission means 51e.
  • the holder 56 itself is in turn connected to the drive device 56a via the connecting element 56b, so that the holder 56 can be moved back and forth in the direction of movement 52a by the drive device 56a. In the position shown, the conveyor channel 42a and the inlet opening 53c of the Conveying channel 53a facing each other.
  • the inlet opening 53d of the conveying channel 53b is ultimately presented to the conveying channel 42a.
  • the cutting edge 51g with the cutting surface 51c is pivoted simultaneously, so that the two cutting surfaces 51c and 51b cut through a weft thread 7 located between the cutting surfaces.
  • FIGS. 2f to 2h show different phases of the cutting and reversing process from a side view.
  • Figures 2i to 2l show the same phases from a top view.
  • the conveying channels 42a and 53b lie in alignment in the shoot-in axis 8, the weft thread 7 being conveyed into the waste container 55.
  • the side view in FIG. 2f shows the conveyor channel 42a and the opposite inlet opening 53d of the conveyor channel 53b.
  • the cutting device 51 with cutting edges 51f and 51g is in the open state 59a.
  • the holder 56 and thus the two inlet openings 53c, 53d are moved in the direction of movement 52e towards the drive device 56a.
  • FIG. 2k again shows the cutting process, in particular the two cutting surfaces 51b, 51c, which cut through the weft thread 7. If the holder 56 is moved further in the direction of movement 52f toward the drive device 56a, as shown in FIGS.
  • the Cutting and reversing process at the end in that the pivotable cutting edge 51g executes an opening movement in the direction of movement 52d, and in that the conveying channel 42a comes to lie opposite the inlet opening 53c of the conveying channel 53a.
  • the cutting and reversing process can of course also be carried out in the opposite direction, in that the holder 56 is moved away from the drive device 56a in the opposite direction to the movement direction 52e, 52f.
  • the two cutting edges 51f, 51g in turn carry out a cutting movement, and at the end of the reversal process, the tear opening 53d comes to rest in front of the conveying channel 42a.
  • the separating and deflecting device 5 also allows a weft thread 7, which is continuously conveyed in the weft insertion direction 7e, to be cut and reversed.
  • a continuously supplied weft thread 7 is cut in FIG. 2k.
  • the reversing process is completed, with the newly formed weft thread tip being introduced into the conveying channel 53a.
  • the separating and deflecting device 5 shown has the advantage that cutting and reversing can be carried out while the weft thread 7 is being conveyed continuously. Further advantages can be seen in the fact that only one drive device is necessary, that the amount of fluid in the conveying channels 53a, 53b can be influenced by the variation of the gap width S, that the fluid loss occurring in the gap conveys away contaminating parts, that the scissors-like cutting device 51 reliably different types of yarn cuts, and that a cutting movement takes place with each reversing process.
  • 3a shows a top view of the thread brake 3.
  • the suction nozzle 25 and the shooting nozzle 41 which are held by supporting elements 400, 401, are arranged in a shooting axis 8.
  • Flat brake elements 31a, 32a, 33a are arranged on both sides of the shooting-in axis 8 pivotable connecting element 34a are movable in the pivoting direction 37, so that a weft thread 7 located between the brake elements 31a, 32a, 33a is touched by two opposite pairs of brake elements 31a, 32a, 33a.
  • the braking elements 31a, 32a, 33a exert a clamping and thus braking effect on the weft thread 7.
  • 3b shows a side view of the braking device.
  • the surfaces of the braking elements 31a, 32a, 33a can be arranged in any direction.
  • the surfaces of the brake elements 31a, 32a, 33a allow the fluid flow between the suction nozzle 25 and the weft nozzle 41 to be influenced in such a way that the weft thread 7 is inserted into the opening of the weft nozzle 41 without any problems.
  • the closed state 31a two pairs of brake elements 31a, 32a, 33a act against each other, the area clamping the weft thread 7 forming a line, so that a clamped weft thread 7 can move along this line.
  • the braking device 3 has a slide 36 with grooves 35, pivotable connecting elements 34 engaging in the grooves 35 with cams 34b, so that when the slide 36 moves in the direction of movement 36a, the braking elements can be moved via the pivotable connecting elements 34a and the pivotable connecting elements 34 connected to them are.
  • An advantage of the present embodiment of the thread brake 3 is that it influences and directs the direction of the fluid flow in the open state. Another advantage can be seen in the fact that the region clamping the weft thread 7 forms a line which runs approximately through the weft axis 8.
  • Each pair of brake elements 31a, 32a, 33a forms a clamping area, so that several clamping areas can be arranged one behind the other in the weft insertion direction.
  • a weft thread 7 drawn off a bobbin can, for example due to the pulling speed, very much in the area of the supply unit 2 or the thread brake 3 behave restlessly.
  • a line-shaped braking areas, and in particular a plurality of line-shaped braking areas arranged one behind the other in the weft insertion direction, are suitable for calming the thread travel of the weft thread 7.
  • the thread brake 3 tightens the thread 7 on the supply unit 2 and thus ensures a uniform tension on the supply unit.
  • FIG. 4 shows the weft thread entry into a row shed weaving machine 102.
  • Four weft threads 71, 72, 73, 74 are conveyed into the weft thread distribution device 9 by four supply units 2 and four metering devices 1.
  • the weft distributing device 9 distributes the delivered weft threads to the respectively opened shed compartments of the weaving rotor 100, the weft threads being introduced into the rotating weaving rotor 100 through stationary fluid nozzles 91, 92, 93, 94.
  • a sensor 46d monitors the insertion of the weft thread 74 into the weaving rotor 100.
  • the weft threads 71, 72 and 73 were shot into the weaving rotor 100 one after the other in ascending order and are therefore correspondingly further against the weft arrival end 100b des Webrotors 100 entered there.
  • the weaving rotor 100 moves in the direction of movement 101, so that the weft threads 7 are simultaneously moved towards the weft scissors 51 or the thread clamp 37.
  • the weft thread 71 is completely inserted in the weaving rotor 100, which is recognized by the sensor 46c, and the weft thread 71 is cut on the weft insertion side by the thread scissors 51 and held by the thread clamp 37.
  • the resulting new thread tip is deflected by the weft distributing device 9 to a further nozzle, not shown, and is introduced into the following shed with respect to the shed into which the weft 74 is inserted.
  • Sensors 46e be arranged along the shed in order to monitor the weft thread 7 flying through the shed.
  • FIGS. 5a to 5c and in FIGS. 6a to 6d The method for automatically correcting irregularities in the insertion of weft threads into a row shed weaving machine is described in FIGS. 5a to 5c and in FIGS. 6a to 6d by the steps involved.
  • a microprocessor which has RAM, ROM and an input / output device, is used to control the sequence of steps, to control the actuators and to record the sensor signals. The steps of action are explained in more detail using the exemplary embodiment according to FIG. 1a.
  • 5a shows a partial step of the method according to the invention, which feeds the weft thread located or stored on the conveying device 40 to the waste container 55.
  • This sub-step is activated, for example, when the thread length stored on the conveyor device 40 falls below a predeterminable value, which occurs when a thread breaks or at the end of a thread spool.
  • the conveying device 40 is rotated in the direction 45 g and the tip of the weft thread 7 is pulled back past the deflecting device 52.
  • the deflection device 52 is actuated so that the angled conveying channel 53b comes to lie in the insertion axis.
  • action step 112 part or all of the weft thread 7 located on the conveyor roller 40 is fed to the waste container 55.
  • FIGS. 5b and 5c show a partial step for automatically inserting a weft thread 7 into the metering device 1 and for placing the weft thread into the weft preparation unit 6 and into the weft thread distribution device 9 of the row shed weaving machine.
  • the thread brake 3 is opened, in action step 114 the nozzles 25, 41 and 42 are actuated, and thus a weft thread 7 is entered along the insertion axis 8 if in the nozzle 25 is a weft 7. If a weft thread breaks between the nozzle 25 and the nozzle 41, this occurs that the weft thread tip is in the region of the nozzle 25.
  • action step 115 the deflection device 43 is pivoted into the position 43d and the conveyor roller 40 rotates in the direction of rotation 45a. If a weft thread 7 is present in the weft thread conveying device 4, it is caught by a catch 49 and guided by the rotary movement of the conveying roller 40 onto the bearing surface of the conveying roller 40, so that with each revolution of the conveying roller 40 an additional turn of the weft thread 7 on the conveying roller 40 is saved. The deflection device 43 is then pivoted back into the basic position 43e. Action step 117 checks whether a weft thread 7 is present on the conveyor roller 40. If there is no weft thread, action step 118 checks whether a new weft thread 7 can be put in place.
  • step 121 the thread brake 3 is closed, in step 122 the weft thread 7 is cut by the weft thread cutting device 51 and thus a new thread tip is generated, in step 123 the deflection device 52 is reversed so that the weft thread 7 can be conveyed into the subsequent weft preparation unit 6, in step 124 the conveyor roller 40 rotates in the direction of rotation 45a until in step 125 the tip of the weft thread 7 is placed in a defined position in the weft thread distribution device 9.
  • Action step 126 checks whether a specifiable thread length is stored on the conveyor roller 40. If this is not the case, action step 127 checked whether a weft thread 7 is present on the conveyor roller 40. If this is the case, the weft thread 7 located on the conveyor roller 40 is removed and a new weft thread 7 is applied to the conveyor roller 40. Action step 128 determines the length of time the machine has come to a standstill. A weft thread that remains in the shed of a row shed weaving machine for a long time, and in particular is kept constantly stretched with a fluid, can be damaged.
  • the tip of the weft thread 7 can fray, so that the weft thread 7 can no longer be fully inserted.
  • the weft 7 is withdrawn from the shed and temporarily stored on the conveyor roller 40. A portion of the stored weft thread 7 is then disposed of in the waste container 55. Thereupon, the weft thread is presented again by action step 129. This includes cutting the weft thread by the cutting device 51, which creates a new weft thread tip, reversing the deflection device 52 and placing the weft thread 7 in a defined position of the weft thread distribution device 9.
  • the weaving rotor of the series shed weaving machine is brought into rotation with the action step 130, and the individual metering devices 1 are operated one after the other, staggered in time and synchronized with the position of the weaving rotor, so that a weft thread entry takes place in the weaving shed of the weaving rotor.
  • Points "7" and "8" in the flow chart according to FIG. 6a form a waiting loop which is exited as soon as a sensor detects an irregularity or the machine is stopped by the operating personnel.
  • the stored thread length is detected by the action step 131 by the sensor 46. If the stored thread length is undershot, a weft thread break or the end of a bobbin can be concluded.
  • action step 132 the weaving rotor and the metering device are stopped in a mutually synchronized manner. Then, with action step 133, the weaving rotor and the conveying roller which is assigned to the broken weft thread are actuated synchronously and in the crawl gear until the corresponding weft thread has been completely inserted. Then, with step 134, the weft thread is clamped by the clamping device 37 and cut by the cutting device 51. It then branches to point "1" and a new weft thread is presented.
  • Action step 135 monitors the entry of a new weft thread 74 into the weaving rotor 100 with the sensor 46d. If there is no new weft thread entry, the weaving rotor and the metering device 1 are stopped synchronously with the action step 136, and the weft thread is stopped by the conveyor roller 40 withdrawn and disposed of and the weft threads 71, 72, 73 partially entered in the shed are completely entered by action step 137 and the weaving rotor 100 is stopped. It then branches to point "9" and the weft threads are put back in place.
  • action step 138 the complete entry of a weft thread is monitored by the sensor 46c and, under certain circumstances, by further sensors 46e distributed along a shed. If it is determined that the weft thread does not reach the sensor 46c, the weaving rotor 100 and the metering device 1 are stopped in a synchronized manner by the action step 139 and a signal for the operating personnel for manual troubleshooting is eliminated with the action step 140 activated. If the sensor 46c detects the absence of a weft thread, the weft thread is already cut on the entry side, so that it can no longer be withdrawn by the metering device.

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  • Textile Engineering (AREA)
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EP19940810640 1994-05-30 1994-11-07 Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase Expired - Lifetime EP0685585B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19940810640 EP0685585B1 (fr) 1994-05-30 1994-11-07 Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP94810316 1994-05-30
EP94810316 1994-05-30
EP19940810640 EP0685585B1 (fr) 1994-05-30 1994-11-07 Dispositif et méthode pour remédier des irrégularitiés à l'insertion d'un fil de trame dans un rotor de tissage sur un métier à tisser multiphase

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EP0685585A1 true EP0685585A1 (fr) 1995-12-06
EP0685585B1 EP0685585B1 (fr) 1999-06-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038616A1 (fr) * 1995-06-02 1996-12-05 SULZER RüTI AG Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie
CN101838880A (zh) * 2009-03-18 2010-09-22 意达（瑞士）有限公司 织机中用于纬纱储存的方法和储存装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445489A1 (fr) * 1990-03-08 1991-09-11 Sulzer RàœTi Ag Dispositif de mesure du fil de trame d'un métier à tisser
EP0477877A1 (fr) * 1990-09-27 1992-04-01 TSUDAKOMA Corp. Dispositif d'alimentation positif de fil de trame pour métier à jet de fluide
EP0559621A1 (fr) * 1992-03-04 1993-09-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif et procédé de manipulation de fil de trame dans un métier à jet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445489A1 (fr) * 1990-03-08 1991-09-11 Sulzer RàœTi Ag Dispositif de mesure du fil de trame d'un métier à tisser
EP0477877A1 (fr) * 1990-09-27 1992-04-01 TSUDAKOMA Corp. Dispositif d'alimentation positif de fil de trame pour métier à jet de fluide
EP0559621A1 (fr) * 1992-03-04 1993-09-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif et procédé de manipulation de fil de trame dans un métier à jet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038616A1 (fr) * 1995-06-02 1996-12-05 SULZER RüTI AG Procede permettant d'enlever un fil de trame sur un metier a tisser a ouverture des fils en serie
US5950684A (en) * 1995-06-02 1999-09-14 Sulzer Rueti Ag Removal of a weft thread in a series shed weaving machine
CN101838880A (zh) * 2009-03-18 2010-09-22 意达（瑞士）有限公司 织机中用于纬纱储存的方法和储存装置
EP2230342A1 (fr) 2009-03-18 2010-09-22 ITEMA (Switzerland) Ltd. Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser
EP2230341A1 (fr) 2009-03-18 2010-09-22 ITEMA (Switzerland) Ltd. Procédé et dispositif de stockage destiné au stockage de fils de trame dans un métier à tisser

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