EP4326930A2 - Dispositif d'alimentation d'une tête de lance d'un métier à tisser en fils de trame - Google Patents

Dispositif d'alimentation d'une tête de lance d'un métier à tisser en fils de trame

Info

Publication number
EP4326930A2
EP4326930A2 EP22718099.9A EP22718099A EP4326930A2 EP 4326930 A2 EP4326930 A2 EP 4326930A2 EP 22718099 A EP22718099 A EP 22718099A EP 4326930 A2 EP4326930 A2 EP 4326930A2
Authority
EP
European Patent Office
Prior art keywords
weft yarn
weft
unit
coupling unit
feed
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
EP22718099.9A
Other languages
German (de)
English (en)
Other versions
EP4326930B1 (fr
Inventor
Peter Schiller
Thomas Laukamp
Harald Horelt
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP4326930A2 publication Critical patent/EP4326930A2/fr
Application granted granted Critical
Publication of EP4326930B1 publication Critical patent/EP4326930B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D03D47/38—Weft pattern mechanisms
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/24—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by gripper or dummy shuttle
    • 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
    • D03D41/008—Looms for weaving flat yarns
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/16—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by a gripper needle entering the shed empty and drawing the weft as it retracts
    • 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
    • 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
    • D03D47/345—Rotating bobbins

Definitions

  • the invention relates to a device for feeding at least first and second weft yarns to a weaving machine comprising at least one rapier head, the weft yarns being able to be fed to the rapier head in the weft direction.
  • WO 2011/015173 A1 discloses a device for transferring two preferably band-shaped weft yarns, also called tapes, one after the other from a feed unit assigned to a weft yarn to a gripper head of a weaving machine.
  • a feed unit assigned to a weft yarn to a gripper head of a weaving machine.
  • the two feed units are arranged one above the other and aligned in the weft direction.
  • Each feed unit has a clamping device for clamping a free end of the respective weft yarn, wherein the respective clamping device can be moved between at least two different operating positions essentially in the weft direction.
  • each clamping device can be moved by means of a pivoting unit driven by a drive, preferably a servomotor, each comprising two parallel pivoting arms connected by a coupling element, with the clamping device being arranged on the coupling element.
  • each clamping device Due to the movement of each clamping device only in a vertical plane, in which the weft insertion line also lies, the respective web-shaped weft material takes a largely twist-free and steering-free course from the feed unit to its transfer to the rapier head. Shear forces that could damage the respective weft yarn do not occur as a result. So it finds its way no deflection takes place during the width extension of the strip-shaped weft material. If the respective clamping device can be moved in said vertical plane, in which the weft insertion line also lies, then various infeed movements can be carried out by means of the device, with no deflection taking place in the direction of the width expansion of the strip-shaped weft material. To transfer a ribbon-shaped weft yarn, its free end is first clamped in the associated clamping device, then transferred to the rapier head and then the clamping device is opened and the weft material is inserted.
  • this known device has the disadvantage that it is relatively complicated and expensive. It also requires a relatively large amount of space. Last but not least, due to the pivoting kinematics when moving the clamping device in the weft direction, there is also an undesirable movement of the respective weft yarn in height, i.e. in the vertical direction in relation to the plane in which the weft insertion line is also located. This has a negative impact on the accuracy of the delivery of the respective weft yarn to the rapier head and also the cutting position of the weft yarn after it has been inserted into the shed.
  • JP 2983531 A describes a weaving machine in which a color choice between two weft yarns is possible.
  • a first weft yarn from a first bobbin or a second weft yarn from a second bobbin which is arranged next to the first bobbin in the warp direction, is inserted into the open shed and then the inserted and cut first or second weft yarn is pushed to the selvedge.
  • This construction means that, in particular, the weft yarn inserted further away from the selvedge must be moved a relatively large distance to the selvedge, which leads to undesired friction problems can occur.
  • the corresponding outlay on equipment is also relatively high.
  • the device according to the invention comprises a coupling unit which, when the device is installed, can be moved back and forth laterally on the weaving machine in the warp direction.
  • This coupling unit connects at least a first and a second feed unit to one another, which are arranged next to one another in the warp direction and are designed in such a way that they are able to feed at least a first and a second weft yarn to the rapier head.
  • the device according to the invention comprises a positioning unit for positioning the coupling unit in or against the warp direction in at least a first and a second position, with the first feed unit in the first position of the coupling unit for feeding the first weft yarn to the rapier head and the second feed unit in the second Position of the coupling unit for feeding the second weft yarn to the rapier head are formed.
  • the coupling unit in cooperation with the positioning unit, positions the at least first and second feed unit in or against the warp direction in order - after suitable positioning - to ensure that the first or second weft yarn is passed to the rapier head enable.
  • the first feed unit in the first position of the coupling unit the first weft yarn to the rapier head, which then brings the first weft yarn into the open shed of the weaving machine.
  • the first feed unit is retracted and the coupling unit is then shifted in the warp direction to the second position such that the second feed unit is transferred to a position in which it the second weft yarn can be transferred to the rapier head.
  • At least two weft yarns for example of different types of material, can be inserted into a fabric quickly and easily.
  • the solution according to the invention has several advantages over the solution described in WO 2011/015173 A1.
  • the weft yarn to be inserted can be fed linearly to the rapier head.
  • the pivoting kinematics according to WO 2011/015173 A1 during this feed movement there is no movement of this weft yarn in the vertical direction, i.e. the weft yarn is always in the same vertical position.
  • This feature also achieves a high level of flexibility with regard to feed movements or reaching options for the weft yarn to be transferred to the rapier head.
  • the device according to the invention also requires little space.
  • the invention makes it possible to move the weft yarn that is passed to or from the rapier head for weft insertion and then pulled through the shed only in a horizontal and linear direction, ie without a vertical movement component, free programming of the control unit is required possible on the reaching movement of the respective weft yarn. This allows for greater accuracy Sufficient and a more precise cut of the respective weft yarn can be achieved after it has been inserted into the shed. A simultaneous height offset as in WO 2011/015173 A1 does not have to be taken into account.
  • the coupling unit can be positioned such that the position of the first feed unit in the first position of the coupling unit and the position of the second feed unit in the second position of the coupling unit match in the warp direction during the respective weft insertion.
  • the first and the second feed unit take the respective preceding position of the other feed unit at different times, for example one after the other, in order to reach the respective weft yarn in this position to the respective movable rapier head through the open shed.
  • the weft yarn to be inserted is always in the ideal insertion axis, while the other weft yarn is slightly deflected laterally in or against the warp direction.
  • the rapier head can be moved through the shed from one selvedge to the other, or the respective weft yarn, for example, halfway to a second rapier head can be passed, which then pulls the weft yarn the second way through the shed.
  • the at least two feed units each comprise carriages that can be moved in the weft direction.
  • the carriages can preferably be moved linearly in and against the weft direction, while they can both be moved back and forth in the warp direction by means of the coupling unit, preferably also linearly.
  • At least one and preferably exactly one drive and preferably a servo motor is coupled to the at least two carriages in such a way that the drive is only able to move one of the at least two carriages in and against the firing direction. Accordingly, the drive moves both slides, but not at the same time, but only one of the two. So while one carriage is moved, for example, in the weft direction in order to transfer the associated weft yarn to the rapier head, the other carriage remains in place. This means that only a small amount of mass (namely of the respective feed unit) is moved, unnecessary mechanical restlessness is avoided and the space requirement on the side of the weaving machine is used optimally. If only said one drive is used for advancing and retracting the two carriages (at different times), this represents a cost-effective and space-saving solution.
  • Each carriage preferably has a clamp, which can be closed and opened by electrical or pneumatic control, for clamping and releasing the respective weft yarn.
  • each clamp seen in the weft direction, has guide elements which are upstream, guide the respective weft yarn on the top and bottom and laterally and which are also part of the respective carriage. In this way, the free end of the weft yarn to be transferred hangs not immediately after the terminal freely downwards, but advantageously first - seen in the weft direction - after the guide elements and is guided by the carriage in a defined manner in the weft direction to the gripper head in order to then be taken over by this.
  • the at least one drive can preferably be controlled in such a way that the respective carriage and in this case preferably its respective guide elements can be guided to different degrees close to or even into the gripper head.
  • This possibility of the individually changeable flow of a weft yarn also represents a separate aspect of the invention, which can be implemented independently of the claimed construction of the coupling unit, feed units and positioning unit.
  • This adapted reaching movement can preferably be implemented by flexible programming of the drive.
  • this aspect of the invention which can also be regarded as independent, relates to a device for feeding at least one first weft yarn to a weaving machine comprising at least one rapier head, with at least one first feed unit with which the at least one weft yarn can be fed to the rapier head in the weft direction, the first feed unit has a first clamp with which at least one section of the at least one first weft yarn can be guided in a non-positive manner when this weft yarn is fed to the rapier head.
  • This device is characterized in that the section of the at least first weft yarn guided by the first clamp can be conveyed linearly in and against the weft direction with respect to the rapier head by means of the first feed unit, this linear movement of said section of the at least first weft yarn along the weft insertion line he follows.
  • relatively limp weft yarn can be inserted further into the open rapier head, so that a reliable transfer of the weft yarn is ensured.
  • the delivery of the weft yarn to be inserted is flexible.
  • various parameters can be taken into account when programming the control unit.
  • the at least first feed unit comprises a first carriage that can be moved in and against the weft direction by means of a drive, preferably a servomotor.
  • Said clamp can also advantageously be closed and opened by electrical or pneumatic control, with guide elements advantageously being provided upstream of the clamp, viewed in the weft direction, guiding the first weft yarn on the top and bottom and on the side.
  • the clamp and the guide elements of the first carriage can be guided to different degrees close to or into the gripper head by means of the drive.
  • the limp weft yarn which protrudes beyond the feed unit in the weft direction and is safely guided by it, gets behind the clamping area of the rapier head and is not stopped in front of the clamping area, for example by parts of the rapier head facing the feed unit.
  • the feed unit moves briefly between the clamping area and then back against the Weft direction back, whereby the weft yarn to be clamped protrudes so far beyond the feed unit that it remains in the clamping area despite the backward movement of the feed unit and is clamped when the rapier head is then closed.
  • a second feed unit with a second carriage is provided, with both feed units being controllable as described above, in particular in order to carry out the described overfeeding, i.e. immersion also the front part of the feed unit or its carriage in the clamping area.
  • the at least two feed units can each comprise a belt conveyor unit.
  • each belt conveyor unit comprises two circulating belt conveyors that can be positioned relative to one another, between which the respective weft yarn can be conveyed in a frictionally engaged manner, at least in the weft direction. If the belt conveyors of the respective feed unit come into frictional contact with the respective weft yarn, the clamped weft yarn is conveyed in the weft direction by driving the belt conveyors in opposite directions, in order to present its free end to the rapier head.
  • the belt conveyors preferably remain in their position in relation to the weft direction, ie always at the same distance from the longitudinal edge of the fabric.
  • the belt conveyors are, according to the invention, moved back and forth in the warp direction by their coupling with the coupling unit in order to place the at least first and second weft yarns respectively for transfer to the rapier head.
  • the positioning unit for positioning the coupling unit preferably includes a drive, and in this case preferably a motor (for example a servomotor) or a pneumatic cylinder, with this drive being able to move to positions that correspond to the first and the second position of the coupling unit. If the drive is designed as a pneumatic cylinder, for example, its two end positions can correspond to the first and second positions of the coupling unit. The result is an extremely simple construction that is easy to control.
  • the coupling unit which can be moved in the warp direction, is particularly preferably coupled to a fixed, i.e. stationary, guide part.
  • This advantageously has first conductive structures, while the coupling unit has conductive elements corresponding to these first conductive structures.
  • the first guide structures and the guide elements work together in such a way that the coupling unit can only be positioned in and against the warp direction.
  • the first guide structures are preferably also designed in such a way that they not only allow the coupling unit to be positioned in or against the warp direction, but also at the same time prevent one of the at least two feed units from moving in the weft direction, and that second guide structures are also provided on the guide part, which allow the other feed unit, which is not prevented from moving, to be moved in and against the weft direction.
  • the first and the second conductive structures are preferably designed to run orthogonally to one another and to cross one another, corresponding to the warp and weft directions running orthogonally to one another. As long as the coupling unit is moved in or against the warp direction by means of the first guide structures, a movement of the first or second feed unit in the weft direction is not possible.
  • the respective feed unit can only be moved after the coupling unit has been positioned in the first or second position.
  • the first and the second guide structures are formed by grooves and/or elevations in the guide part.
  • a first weft yarn store that is set up further away is preferably provided, which comprises a first spool that stores the first weft yarn. From here the first weft yarn can be fed to the first feed unit.
  • a second weft yarn store which is set up further away is preferably provided, which comprises a second spool which stores the second weft yarn. From here, the second weft yarn can be fed to the second feed unit.
  • a first guide element is preferably arranged between the first weft yarn store and the first feed unit directly in front of the first feed unit. Furthermore, a second guide element is preferably arranged between the second weft yarn store and the second feed unit directly in front of the second feed unit. In this case, the first and the second guide element run side by side at least immediately in front of the respective assigned first or second feed unit. Said first or second guiding element is preferably coupled to the first or second feed unit and is displaced back and forth with it in the warp direction due to the movement of the coupling unit. Alternatively they are first and second guide element arranged stationary.
  • the first weft yarn store is arranged above the second weft yarn store, with the bobbin axis of the first weft yarn store lying above the bobbin axis of the second weft yarn store.
  • This arrangement saves space.
  • the two weft yarns come out of their respective weft yarn store running one on top of the other, while they lie next to each other for the purpose of reaching the rapier head.
  • the first and second weft accumulators are oriented in the weft direction, with the axes of the first and second spools then being oriented in the warp direction.
  • the first and the second weft yarn store are aligned in the warp direction, the axes of the first and the second bobbin then being aligned in the weft direction and deflection means are provided for deflecting the first and second weft yarn in the weft direction.
  • specific space requirements on the weaving machine and in the weaving mill can be taken into account.
  • the invention also relates to a weaving machine with at least one gripper head that can be moved in and against the weft direction through the open shed and with a device as described above.
  • the invention also relates to a method for feeding in at least first and second weft yarns during fabric production by means of a weaving machine having at least one gripper head, preferably using a device according to one of the preceding claims, with at least one first and one second weft yarn in one plane in the warp direction placed side by side at one edge of the fabric and sequential in time (not necessarily alternately) are fed to the rapier head of the weaving machine in the weft direction, with the at least first and second weft yarn being positioned in or against the warp direction for their respective weft insertion in such a way that they are each pulled along the weft insertion line through the open shed by at least one rapier head, wherein the weft yarn not to be inserted at the moment is deflected in or against the warp direction to release the weft insertion line from this weft insertion line (E).
  • the device according to the invention and the method according to the invention can be used particularly preferably for ribbon-shaped weft yarns or ribbon-shaped weft materials, for example those that contain carbon, glass and/or basalt fibers or filaments. Tape-shaped weft yarns or tape-shaped weft materials of different widths can be processed.
  • FIG. 1a-1f shows a top view of a schematically illustrated device according to the invention (without weft yarns) with feed units comprising carriages in different positions;
  • FIGS. 2a-2c show a plan view of the device shown schematically in FIGS. 1a-1f with inserted weft yarns and weft yarn stores;
  • FIG. 2d shows a side view of the device shown schematically according to FIGS. 2a-2c;
  • FIGS. 3a-3d show a view from below of a device according to the invention, shown schematically, to clarify the kinematics;
  • Figure 4 is a perspective plan view of the front part of a
  • FIGS. 5a-5f show a schematic side view of different approach positions of a carriage relative to a gripper head
  • FIGS. 6a-6e show a schematic side view of a further embodiment of a feed unit.
  • a device 1 according to the invention is shown very schematically, for feeding first and second weft yarns S1, S2 (these are not shown in Figure 1 for the sake of clarity, see Figures 2a-2d).
  • a rapier head 82 of a weaving machine 80 which is only shown very schematically in detail.
  • the device 1 is arranged to the side of the weaving machine 80 and passes the first and second weft yarn S1, S2 to be inserted to the gripper head 82.
  • the device 1 comprises a coupling unit 10 on which a first feed unit 30 and a second feed unit 50 are provided, the first feed unit 30 reaching the first weft yarn S1 and the second feed unit reaching the second weft yarn S2 to the gripper head 82 .
  • the rapier head 82 pulls the weft yarn passed to it and then clamped along the weft insertion line E through the open shed.
  • the two feed units 30, 50 are movement-coupled to one another via the coupling unit 10.
  • the coupling unit 10 can be moved into two defined positions along the fabric edge in and against the warp direction KR by means of a drive 15, which is designed here as a pneumatic cylinder 16 with a pushing or pulling cylinder rod 17. This method of moving the coupling unit 10 also positions the two feed units 30, 50 in the warp direction KR.
  • Both the first feed unit 30 and the second feed unit 50 include slides 31 and 51 that can be moved in and against the weft direction SR - is controlled by a control unit 5 - as well as the pneumatic cylinder 15.
  • the corresponding control lines are shown in dotted form in FIG.
  • the coupling unit 10 is in a first position.
  • the first feed unit 30 for its part assumes a position in which the first weft yarn S1 lies in the weft insertion line E.
  • the coupling unit 10 is still in said first position, but the first feed unit 30 has moved forward to the gripper head 82 in the weft direction SR.
  • the weft yarn S1 is passed or transferred to the rapier head 82, whereupon the rapier head 82 moves through the open shed.
  • the first feed unit 30 is moved back to its starting position by means of the drive 42 counter to the weft direction SR.
  • the weft yarn S1 can now be cut through in the cutting plane SE by means of a cutting device 79, shown only schematically.
  • the coupling unit 10 is then moved into its second position by means of the pneumatic cylinder 16, in which the second weft yarn S2 presented in the second feed unit 50 is aligned with the weft insertion line E.
  • the second feed unit is moved in the weft direction SR, again with the aid of the drive 42, to the gripper head 82, where the weft yarn S2 is transferred.
  • the coupling unit 10 can be moved back into the position shown in FIG. 1a.
  • FIGS. 2a-2d the device 1 according to FIG. 1 is again shown in a schematic top view, some features being omitted and other features being shown.
  • the first weft yarn S1 is wound up on a spool 72 in an upper weft yarn store 70 . From there, the first weft yarn S1 is guided to the first feed unit 30 via a deflection roller 71 .
  • a second, lower weft yarn store 75 below the first, upper weft yarn store 70 is a second, lower weft yarn store 75, which stores a second bobbin 77 with the weft yarn S2 wound thereon. From there, the second weft yarn S2 is guided to the second feed unit 50 via a deflection roller 76 .
  • the two weft yarn stores 70, 75 are aligned with one another in the plan view (see FIGS. 2a-2c).
  • the two weft yarns S1, S2 initially essentially run over one another at a very small distance, but then diverge slightly in the direction of the feed units 30, 50, as will be explained below with reference to FIGS. 2a-2c.
  • the first feed unit 30 is the carriage 31 - by appropriate positioning of the not coupling unit 10 shown - in a position in which its weft yarn S1 can be inserted along the weft insertion line E by means of the rapier head 82.
  • the second feed unit 50 is slightly deflected counter to the warp direction KR.
  • the central axis D2 of the second weft yarn S2 is extended up to the weft yarn stores 70, 75. From this it is clear that there is a small angle between the weft insertion line E and the central axis D2 of the second weft yarn S2. However, this is not critical since the second weft yarn S2 is not being inserted into the shed at this moment.
  • FIG. 2b shows once again how the first feed unit 30 brings the weft yarn S1 to the gripper head 82.
  • the coupling unit 10 (not shown) has been moved to the second position, in which the second weft yarn S2 is aligned with the weft insertion line E.
  • the first feeding unit 30 is positioned outside the weft insertion line E, with the central axis D1 of the weft yarn S1 forming a small angle therewith.
  • FIGS. 3a-3d show a special embodiment of the device 1 shown only schematically in FIGS. 1 and 2.
  • FIGS. 3a-3d show a bottom view of a device 1.
  • the pneumatic cylinder 16 can be seen with its cylinder rod 17.
  • the cylinder rod 17 is connected to the coupling unit 10 so that the pneumatic cylinder 16 can move the coupling unit 10 back and forth in the warp direction KR.
  • the coupling unit 10 is essentially U-shaped when viewed from below, elevations 11 being provided on its two leg ends, which point downwards (ie towards the viewer here). These elevations 11 are in engagement with one designed as a guide groove first conductive structure 21 provided in a guide part 20 .
  • the guide part 20 is fixed, ie stationary, installed, just like the pneumatic cylinder 16 .
  • Said first guide structure 21 in the guide part 20 runs in the warp direction KR, so that the coupling element 10 with its elevations 11 is positively guided by the first guide structure 21 in and against the warp direction KR when it is set in motion by the pneumatic cylinder 16.
  • a drive mechanism is provided, which in the present case consists of a drive 42 designed as a servo motor with a planetary gear, a pivoting lever 43 and a sliding block 45 arranged stationary on the pivoting lever but rotatable by means of a rotary joint 44 .
  • Each of the two carriages 31, 51 has a recess 46 for the sliding block 45 on its underside (i.e. facing the viewer). The two recesses 46 are aligned with one another when the two carriages 31, 51 are at the same height in the firing direction SR (FIG. 3a, FIG. 3c).
  • the coupling unit 10 On the underside of the first carriage 31 there is also a guide element 41 in the form of an elevation and on the underside of the second carriage 51 there is a guide element 56 also in the form of an elevation.
  • these elevations 41, 56 can be positively guided in a second guide structure 22 designed as a guide groove in the guide part 20 in and against the weft direction SR.
  • the coupling unit 10 is shown in its first position, in which the first carriage 31 is positioned in such a way that it can be moved in the shooting direction SR due to its elevation 41.
  • the elevation 56 of the second carriage 51 abuts against the edge of the second guide structure 22, so that a movement of the second carriage 51 in the firing direction SR is prevented. So that the second carriage 51 can slide in the firing direction SR, the coupling unit 10 must be brought into its second position by the pneumatic cylinder 16 (see the discussion of FIGS. 3c and 3d below).
  • Figure 3b shows how - driven by the drive 42 and the pivoting mechanism together with the sliding block 45 - the first carriage 31 was advanced in the weft direction SR, i.e. in the direction of the gripper head 82 (not shown), and in doing so by the guide structure running in the second guide structure 22 Survey 41 was forcibly guided.
  • the first and second slides 31, 51 are again at the same height.
  • the pneumatic cylinder 16 has now shifted the coupling unit 10 into its second position in the warp direction KR.
  • the slot nut 45 has slipped into the recess 46 of the second carriage 51.
  • the second carriage 51 can then be moved in the weft direction SR by the drive 42 in order to reach the second weft yarn S2 to the rapier head 82 or to transfer it to it.
  • the carriage 31 of the feed unit 30 is shown in more detail in FIG. 4 (the carriage 51 of the feed unit 50 is preferably structurally identical).
  • the carriage 31 has a metal sheet 40 that is closed in a U-shape.
  • the two upwardly projecting side legs of this plate 40 serve as lateral guiding elements 39 for the weft yarn (not shown), while the base of the plate 40 serves as a lower guiding element 36 serves.
  • a clamp 32 is provided in the central area of the plate 40, which presses the weft yarn downwards with the aid of a pneumatically loaded pressure rod 33 (only partially shown here).
  • an upper guide element 35 which is coupled to the clamp 32 and has an open cross section and presses the weft yarn downwards against the lower guide element 36 of the plate 40 .
  • the weft yarn is thus reliably guided to the gripper head 82 both laterally by the guide elements 39 and on its top and bottom by the guide elements 35, 36.
  • the clamp 32 is also followed by an upper guide surface 34 for the weft yarn, which is aligned with the U-shaped plate and passes between the plate 40 and the upper guide surface 34 .
  • a first guide element 28 which is also designed as a U-shape and is optional, is connected in this embodiment. This serves to guide the weft yarn S1 in an orderly manner to the first feed unit 30.
  • the first guide element 28 is displaced together with the first feed unit 30 in or counter to the warp direction KR (by means of the coupling unit 10).
  • the weft yarn S1 or S2 to be inserted is selected from the two adjacent weft yarns S1, S2 by a lateral displacement of the coupling unit 10 in and against the warp direction KR.
  • the displacement of the coupling unit 10 in or against the warp direction KR is triggered pneumatically in the present case, while a drive 42 designed as a servo motor controls the infeed of the weft direction SR selected weft yarn S1 or S2 to the gripper head 82 takes over.
  • the device according to the invention can be implemented cost-effectively, since only one servo drive can be used for the feed movement and one pneumatic drive for the color selection.
  • WO 2011/015173 A1 requires two servo drives for the pivoting kinematics.
  • the relatively inexpensive pneumatic cylinder 16 can be used to select the color by switching between the two weft yarns S1, S2.
  • FIGS. 5a-5f a handing over or handing over of a first weft yarn S1 (the second weft yarn S2 could just as well be selected) to a gripper head 82 is shown in chronological order.
  • Figures 5a-5f also demonstrate the - also - to be regarded as independent aspect of the invention of a device for feeding at least one first weft yarn S1 to a weaving machine comprising at least one gripper head 82, in which a coupling unit 10, at least two feed units 30, 50 and a positioning unit 15 are provided.
  • Such a device comprises at least one first feed unit 30, with which the at least one weft yarn S1 can be fed to the gripper head 82 in the weft direction SR, wherein the first feed unit 30 has a first clamp 32, with which at least one section of the at least one first weft yarn S1 is fed during feeding this weft yarn S1 can be guided to the gripper head 82 in a non-positive manner.
  • This device is characterized in that the section of the at least first weft yarn S1 guided by the first clamp 32 can be conveyed linearly in and against the weft direction SR in relation to the rapier head 82 by means of the first feed unit 30, with this linear movement of said section of the at least the first weft yarn S1 along the weft insertion line E.
  • the weft yarn S1 is clamped by the schematically illustrated clamp 32 and guided in the direction of the gripper head 82 on the top and bottom by guide elements 35, 36.
  • the weft yarn S1 is said to be relatively limp and should be securely clamped by the rapier head 82.
  • Flierzu a crossing strategy is selected. According to FIG.
  • the gripper head 82 which has an upper gripping part 85 with an upper clamping part 86 and a lower gripping part 87 with a lower clamping part 88, opens.
  • the carriage 31 together with the weft yarn S1 is now moved in between the two clamping parts 86, 88 by moving the first feed unit 30 in the weft direction SR. This ensures that the weft yarn S1 actually gets into the rapier head 82, i.e. the free end of the weft yarn S1 does not hit the front of the lower clamping part 88 when the carriage 31 is moved in the weft direction SR, for example, and is then no longer transported into the rapier head 82 can.
  • the feed unit 30 is then moved out of the gripper head 82 again, with the free end of the weft yarn S1 remaining between the upper and lower clamping parts 86, 88, however. In this way it is ensured that the limp weft yarn S1 is actually moved behind the two clamping parts 86, 88.
  • the gripper head 82 is now closed, with the upper and lower clamping parts 86, 88 clamping the free end of the weft yarn S1 in a non-positive manner.
  • the clamp 32 now opens, which in this case also raises the upper guide part 35.
  • the gripper head 82 can then be moved through the open shed in the weft direction SR, taking the weft yarn S1 with it.
  • the step in FIG. 5b ie the insertion of the carriage 31 between the two clamping parts 86, 88, can be omitted.
  • a safe transfer of the weft yarn S1 due to its higher flexural rigidity can also be safely implemented without running over the carriage 31, ie inserting the carriage 31 in the weft direction beyond the clamping area between the two clamping parts 86, 88.
  • the feed units 30, 50 in this embodiment each include a belt conveyor unit 60, which includes two revolving belt conveyors 62 that can be positioned relative to one another, between which the respective weft yarn S1 or S2 can be conveyed in a non-positive manner in the weft direction SR.
  • each belt conveyor 62 comprises three rollers, at least one of which is actively driven.
  • FIG. 6a shows that the two belt conveyors 62 clamp a weft yarn S1 between them, for example.
  • the weft yarn S1 is advanced between the two clamping parts 86, 88 according to FIG. 6b, whereupon the rapier head 82 closes and the weft yarn S1 is clamped (FIG. 6c).
  • the two belt conveyors 62 are now moved away from one another, so that the gripper head 82 can pull the weft yarn S1 through the shed.
  • the inserted weft yarn S1 is cut with the belt conveyors 62 previously moved back into the clamping position.
  • the free weft yarn end can then be moved back to its starting position (see FIG. 6a) by the belt conveyors 62 counter to the weft direction SR.
  • the weft yarns S1, S2 to be fed to the gripper head 82 lie next to one another in the warp direction KR in front of the fabric edge. They preferably come from weft yarn stores 70, 75 arranged one above the other Weft yarn S1, S2 to be inserted in each case is carried out by laterally moving the coupling unit 10 together with the feed units 30, 50 designed here as a carriage (reach carriage) or as a belt conveyor unit 60.
  • the coupling unit 10 is moved laterally in or against the warp direction KR such that during the Weft insertion, the weft yarn S1 or S2 to be inserted is preferably inserted without deflection, while the weft yarn S2 or S1 that is not to be inserted moves a small amount laterally in or against the warp direction KR on its way from the weft yarn store 75 or 70 to the feed unit 50 or 30 is deflected. This has no negative effect on this weft yarn S2 or S1 since it is not moved in the weft direction SR in this phase.
  • the device according to the invention and the method according to the invention can easily be extended to more than two weft yarns.
  • weft yarns of different widths and/or materials and/or with different pretreatments can be used in order to obtain a corresponding structure and/or pattern, for example.
  • two (or more) identical weft yarns can also be used.
  • Another advantage of using the same weft yarns is that the machine does not have to be stopped if the supply of one weft yarn has been inserted into the fabric and then the other weft yarn is switched to without a break. While this weft yarn is being fed in, the previously empty weft yarn can be replaced in the corresponding weft yarn store. In general, longer running times can be achieved with the same weft materials and changing weft yarn stores.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

L'invention concerne un dispositif (1) d'alimentation d'un métier à tisser en au moins des premiers et deuxièmes fils de trame, le métier à tisser comprenant au moins une tête de lance, les fils de trame pouvant alimenter la tête de lance dans la direction de trame (SR). Le dispositif selon l'invention comprend : - une unité de couplage (10) qui, à l'état monté du dispositif (1), est animé d'un mouvement de va-et-vient dans la direction de chaîne (KR) sur le côté du métier à tisser ; - au moins une première et une deuxième unité d'alimentation (30, 50), la première et la deuxième unité d'alimentation (30, 50) étant disposées côte à côte sur l'unité de couplage (10) dans la direction de chaîne (KR) et étant conçues pour alimenter la tête de lance en un premier ou un deuxième fil de trame ; et - une unité de positionnement (15) destinée, dans au moins une première et une deuxième position, au positionnement de l'unité de couplage (10) dans la direction de chaîne (KR) et en sens inverse, la première unité d'alimentation (30) permettant, dans la première position de l'unité de couplage (10), d'alimenter la tête de lance en le premier fil de trame et la deuxième unité d'alimentation (50) permettant, dans la deuxième position de l'unité de couplage (10), d'alimenter la tête de lance en le deuxième fil de trame. L'invention concerne également un procédé correspondant.
EP22718099.9A 2021-04-19 2022-03-23 Dispositif et procédé d'alimentation d'une tête de lance d'un métier à tisser en fils de trame Active EP4326930B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021203879.4A DE102021203879B3 (de) 2021-04-19 2021-04-19 Vorrichtung zum zuführen von schussgarnen zu einem greiferkopf einer webmaschine
PCT/EP2022/057579 WO2022223225A2 (fr) 2021-04-19 2022-03-23 Dispositif d'alimentation d'une tête de lance d'un métier à tisser en fils de trame

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EP4326930A2 true EP4326930A2 (fr) 2024-02-28
EP4326930B1 EP4326930B1 (fr) 2025-07-16

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EP22718099.9A Active EP4326930B1 (fr) 2021-04-19 2022-03-23 Dispositif et procédé d'alimentation d'une tête de lance d'un métier à tisser en fils de trame

Country Status (6)

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US (1) US12448707B2 (fr)
EP (1) EP4326930B1 (fr)
JP (1) JP7851959B2 (fr)
CN (1) CN117295856A (fr)
DE (1) DE102021203879B3 (fr)
WO (1) WO2022223225A2 (fr)

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Publication number Priority date Publication date Assignee Title
US20260002299A1 (en) * 2024-06-30 2026-01-01 Newbolt Ltd. Freeform weaving loom

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CH193043A (de) * 1936-08-01 1937-09-30 Tefag Textil Finanz Ag Vorrichtung zur Übergabe des Schussfadens.
US3517704A (en) * 1963-09-12 1970-06-30 Saurer Ag Adolph Weft inserting device
GB1259033A (fr) * 1968-09-21 1972-01-05
CS200393B1 (en) * 1978-06-06 1980-09-15 Miloslav Prochazka Weft missile issueing apparatus for gripper weaving looms
US4784191A (en) * 1984-12-22 1988-11-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for storing a weft yarn for inserting in a jet loom
BE1001819A3 (nl) * 1988-06-17 1990-03-13 Picanol Nv Inrichting en werkwijze voor de toevoer van inslagdraden bij weefmachines.
US5501250A (en) * 1994-11-22 1996-03-26 E. I. Du Pont De Nemours And Company Method for deleting and reintroducing yarns to a textile process
JP2000073256A (ja) * 1998-08-20 2000-03-07 Tsudakoma Corp キャリアレピアのヤーンキャッチャー開閉装置
JP2983531B1 (ja) 1998-09-29 1999-11-29 福井県 開繊糸織物の製造方法とその装置
BE1014132A5 (nl) * 2001-04-20 2003-05-06 Wiele Michel Van De Nv Inslagdraadklem voor het klemmen en lossen van inslagdraden van een weefmachine.
EP1838911B1 (fr) * 2005-01-17 2015-10-21 Tape Weaving Sweden AB Procede et appareil de tissage de chaine et de trame en forme de bande et materiau ainsi realise
DE102006025265A1 (de) 2006-05-31 2007-12-06 Lindauer Dornier Gmbh Verfahren und Vorrichtung zum Bilden einer Gewebekante an einer Greiferwebmaschine
KR100822409B1 (ko) * 2007-01-10 2008-04-17 박경희 복합재료시트 직조시스템
DE102009036589A1 (de) * 2009-08-07 2011-02-10 Lindauer Dornier Gmbh Vorrichtung zum Übergeben eines bandförmigen Schussmaterials
DE102012212169A1 (de) * 2012-07-11 2014-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Vorrichtung zum Zwischenspeichern von bandartigem Schussmaterial für eine Webmaschine und Webmaschine mit einer solchen Vorrichtung
KR101652987B1 (ko) * 2015-05-15 2016-09-12 대유씨티 주식회사 발열시트 제조방법 및 이의 제조장치
IT201700066823A1 (it) * 2017-06-15 2018-12-15 Itema Spa Sistema perfezionato di presa/rilascio del filo di trama in un telaio tessile a proiettile
IT201700073787A1 (it) * 2017-06-30 2018-12-30 Itema Spa Dispositivo di gestione dei fili di trama senza la formazione di falsa cimossa in un telaio tessile a pinze
DE102018211537A1 (de) * 2018-07-11 2020-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Schussfadeneintrag an einer Webmaschine und Webmaschine

Also Published As

Publication number Publication date
US20240200241A1 (en) 2024-06-20
WO2022223225A3 (fr) 2022-12-29
WO2022223225A2 (fr) 2022-10-27
DE102021203879B3 (de) 2022-03-17
JP7851959B2 (ja) 2026-04-27
EP4326930B1 (fr) 2025-07-16
JP2024517107A (ja) 2024-04-19
CN117295856A (zh) 2023-12-26
US12448707B2 (en) 2025-10-21

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