EP0043441B1 - Procédé et dispositif pour réaliser une jointure tissée comme liaison entre deux bouts de tissu - Google Patents

Procédé et dispositif pour réaliser une jointure tissée comme liaison entre deux bouts de tissu Download PDF

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Publication number
EP0043441B1
EP0043441B1 EP81104197A EP81104197A EP0043441B1 EP 0043441 B1 EP0043441 B1 EP 0043441B1 EP 81104197 A EP81104197 A EP 81104197A EP 81104197 A EP81104197 A EP 81104197A EP 0043441 B1 EP0043441 B1 EP 0043441B1
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EP
European Patent Office
Prior art keywords
seam
threads
weaving
weft
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81104197A
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German (de)
English (en)
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EP0043441A1 (fr
EP0043441B2 (fr
Inventor
Rudolf O.Prof.Dr.-Ing. Koller
Walter Dr.-Ing. Runkel
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Herman Wangner GmbH and Co KG
Original Assignee
Herman Wangner GmbH and Co KG
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Application filed by Herman Wangner GmbH and Co KG filed Critical Herman Wangner GmbH and Co KG
Priority to AT81104197T priority Critical patent/ATE9724T1/de
Publication of EP0043441A1 publication Critical patent/EP0043441A1/fr
Publication of EP0043441B1 publication Critical patent/EP0043441B1/fr
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Publication of EP0043441B2 publication Critical patent/EP0043441B2/fr
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof
    • 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

Definitions

  • the invention relates to a method and an apparatus for creating a woven seam for connecting two open fabric ends, in particular for the purpose of producing an endless fabric tape, e.g. for the paper industry, in that the fabric ends are partially frayed and a seam weaving compartment is formed from the weft threads removed from the fabric ends, into which the exposed original warp threads of the fabric ends are introduced as now weft threads.
  • the object of the invention specified in claims 1 and 8 is to mechanize and automate the seam weaving process described at the outset, so that it can be carried out effortlessly by all textile workers without special training.
  • Woven seams should be able to be created reliably for all types of fabric in question, without the occurrence of cross folds and other weaving errors.
  • a special needle roller can preferably insert the weft thread in the seam weaving compartment instead of the weaving sley.
  • the specified weaving order of the now weft threads, originally warp threads, can be connected to one another by gluing, soldering or welding the threads to be woven in each case on their outer edges and is thereby retained. It can also be ensured by weaving in auxiliary warp threads that are foreign to the fabric at the outer edges of the weft threads, originally warp threads, which now protrude from the fabric.
  • the thread to be woven in is picked up and guided by means of an air stream.
  • a cutting device aligned against the woven seam can move into the open seam compartment and cut the respective weft thread or thread pair individually or together.
  • the now warp threads, originally weft threads can be raised in three stages and, consequently, two compartments can arise at the same time, through which a weft thread is passed, but in the opposite direction.
  • Each separator can be thread-like composed of a series of alternately thinner and thicker disks plugged onto a common separator shaft, in that the thicker disks have a thickness which corresponds to the thickness of the threads to be interwoven, and the diameter difference between the thicker and the thinner disks is sufficient in order to take up the structure of the threads to be woven between each pair of discs, the first disc viewed against the weaving direction serving as the run-in disc and the last disc viewed in the same direction serving as the output disc and both the thinner discs and the thicker discs being cut laterally and pre-bent in a thread-like manner .
  • each separator can only have a single, thicker disk, which is clamped between a ring provided with a metric thread on its surface, the inlet disk and the outlet disk.
  • each separator is preferably composed of a wind tunnel consisting of aerodynamically shaped baffles and an air nozzle projecting into it, the air flow generated by the air nozzle, deflected in the wind tunnel, acting as a gripper and guide of the weft thread to be woven in in each case.
  • difficult tissue structures e.g.
  • the weft thread released from the weaving of the web strip can be picked up by a needle separator rotating in the cycle of the weaving process and equipped with at least one separator needle, the separator needle of which picks up the weft thread and separates it from the other weft threads.
  • the weft thread to be woven is picked up by a tubular plug-in arm which is controlled in the course and in the rhythm of the seam weaving process, can be swung out on a two-leg swivel arm and can be moved back and forth through the seam weave compartment formed, at least one of which is in its interior Free end of kinked and attached to the swivel arm steel wire is slidably arranged relative to the plug-in arm and clamps between the bent part and the open tube end of the plug-in arm, the weft thread to be woven in and releases the weft thread after pulling out in the cycle of the seam weaving process and swiveling the plug-in arm .
  • the insertion of the individual weft thread in the seam weaving compartment is preferably carried out by means of a step-by-step bearing, e.g. Needle roller driven by a stepper motor, on the rotating shaft of which two rows of needles, which consist of a plurality of flexible elastic needles, are arranged helically in such a way that the helix of one row of needles runs to the right and that of the second row of needles runs to the left.
  • a step-by-step bearing e.g. Needle roller driven by a stepper motor
  • Z-shaped needles take place, which are arranged parallel to each other and longitudinally displaceable on a guide bed, with one end protruding into a curved groove of a backdrop that can be moved back and forth in the cycle of the weaving process, reach into the seam weaving compartment with the bent free needle part and there one of the curve shape the cam groove performs the corresponding slide-in movement.
  • the seam weaving machine according to the invention consists of two opposing mirror-image and otherwise identical machine halves M, M '.
  • the elements of this machine half are each provided with the same reference number, the reference number of the half shown in FIG. 2 being provided with a dash.
  • the machine half M, M ' only the one element in question is described and numbered; the description and numbering automatically apply to the same element of the other machine half.
  • the two machine halves M, M ' are connected to one another via a common frame G.
  • the frame G is slidably supported on the guide rails 2 by means of support prisms 1 and can be shifted from one end of a textile web 4 to the other end by means of a stepping motor 3, normally 4 to 8 m.
  • Both machine halves M, M ' have in common a jacquard machine 5 fastened to the frame G and a sley 6.
  • the fabric ends of a fabric 7 to be woven together are stretched to the right and left of the clamped warp threads 8 onto a tensioning device 9.
  • the frame G with the two machine halves M, M 'and the jacquard machine is slidably mounted on this clamping device 9.
  • the fabric ends are clamped in such a way that the corresponding weft threads 10 (warp threads in the previous weaving process) of one fabric end lie opposite the weft threads 10 'of the other fabric end.
  • the seam weaving compartments 11 to be formed one after the other are formed with the jacquard machine 5.
  • the weft thread 12 to be woven is inserted into the corresponding seam weaving compartment 11 with the aid of the seam weaving machine M, M 'according to the invention, pushed in with the sley 6 and integrated by forming a new seam weaving compartment 11' corresponding to the seam weaving process.
  • the weft thread 12 'to be woven is introduced into this newly formed seam weaving compartment 11' with the aid of the seam weaving machine M ', M, pushed in with the sley 6 and integrated by forming a new seam weaving compartment 11.
  • This sequence of operations of inserting the weft threads 12, 12 'which are respectively to be woven in with the aid of the seam weaving machine M, M' into the correspondingly successively formed seam weaving compartments 11, 11 ' is repeated until the weave seam 13 is completed.
  • the symmetrical halves M, M 'of the seam weaving machine shown in FIGS. 2 and 3 are constructed symmetrically to the weave seam 13.
  • weft threads 12, 12 ' are spatially separated with the aid of disk separators 14.
  • the workflow is identical on the right and left side of the seam weaving machine M, M '.
  • Each disk separator 14 rotatably mounted in the frame G, shown in FIGS. 4 and 5, essentially consists of a separator shaft 15, an inlet disk 16, a threaded part 17, 18 and an outlet disk 19.
  • the threaded part 17, 18 consists of individual disks of different thickness and outside diameter, the thinner disks 17 having a larger diameter and the thicker disks 18 having a smaller diameter.
  • the thickness of the washers 18 is dependent on the diameter of the weft threads 10 to be processed, and the thickness of the larger washers 17 is dependent on the spacing of the individual warp threads, now weft threads 10, in the fabric 7 from one another.
  • the difference in diameter between the thinner and thick washers 17, 18 must be so large that the weft threads 10 structured by the weaving process fit into the individual threads of the thread formed from the washers 17, 18 without deformation of the structure.
  • the thread-like structure 17, 18 arises from the fact that the individual disks 17, 18 are correspondingly cut and pre-bent at their outer edges. This deformation of the disks 17, 18 can take place by means of a cutting and bending device 20, which can be seen in FIG. 31.
  • a thread is thus created, on which the weft threads 10 individually drawn in by the inlet disk 16 are transported only in a certain rotational range of the disk separator 14. So that such a thread-like structure can be achieved, the individual disks 16 to 19 must be attached to the separator shaft 15 and additionally to the guide rods 21 in the following manner.
  • the outlet disk 19 which is supported on a collar 22 of the separator shaft 15. Following the outlet disk 19 comes first a thick disk 18, then a thin disk 17 etc. So many thin and thick disks 17, 18 are pushed onto the separator shaft 15 and respective guide rod 21 in the order described until the required thread length is reached is. Finally, the inlet disk 16 is pushed onto the separator shaft 15 and guide rods 21. After the individual disks 16 to 19 have been placed on the separator shaft 15, they are clamped against the collar 22 formed on the separator shaft 15 by means of a clamping ring 23 and a clamping nut 24. The desired transport of the weft threads 10 takes place on this thread-like structure 16 to 19 in a certain rotational range.
  • One of the guide rods 21 is flattened on a surface line and lies with the flattened side against the separator shaft 15, cf. Fig. 5. This measure serves the purpose of always ensuring that the thread pitch is always the same.
  • the shape of the face milling on the clamping ring 23 and the outlet disk 19 depends on the required thread pitch and direction of the pitch and thus again on the diameter of the weft threads 10 and the direction of rotation of the disk separator 14.
  • the disc separator 14 of the machine half M makes a clockwise rotation limited to 360 ° and then intermittent, while the disc separator 14 'carries out the same counterclockwise rotation, as seen in the weaving direction.
  • This rotary movement which interrupts after each revolution, is generated by a stepper motor 25 (FIG. 2).
  • the respective direction of inclination of the thread-like structure 16 to 19 on the disk separator 14 is achieved by corresponding milling on the face side on the clamping ring 23 and the outlet disk 19 and by corresponding cutting and pre-bending of the disks 16, 17, 18.
  • the pitch direction of the thread on the outlet disk 19 corresponds to the pitch of the remaining thread 16 to 18.
  • the individual pulling in of the weft threads 10 onto the disk separator 14 is achieved in that the run-in disk 16 provided with an incision 26 made by the cutting and bending device 20 is constructed in exactly the same way as the thin disks 17 of the thread-like structure 17, 18 only with the difference that opposite to the incision 26 on the run-in disk 16, a segment is cut off parallel to this incision 26 (shown in FIG. 6), so that a kind of knife edge 27 is created.
  • This measure interacts with a first weft thread guide 28 responsible for the entry of the weft threads 10 and with a second weft thread guide 29 serving for the exit.
  • Each weft guide 28, 29 consists of a bar provided with a knife edge aligned against the separator 14, which can be displaced both vertically and axially, the first weft guide 28 being longer than the second weft guide 29, while the first weft guide 28 around the outlet side a length dimension that exactly corresponds to the width of the outlet disc 19.
  • the inlet disk 16 is at a predetermined distance from the first of the thinner disks 17 (Which has disks with a larger diameter), has the effect that only one weft thread 10 per revolution (360 °) of the disk separator 14 can be pulled onto it.
  • the outlet disk 19 located at the end of the thread-like structure 16 to 18 is designed in such a way that the weft thread 12 to be woven is spatially separated from the weft threads 10 still located on the threads. This spatial separation takes place in the axial direction by means of a special thread 30 cut on the outlet disk 19 with a large pitch. Furthermore, a milling 31 (FIGS. 3 and 7) on the circumference of the outlet disk 19 enables the weft thread 12 to be taken over by a gripper 32 (FIGS. 2 and 3).
  • This gripper 32 is designed like a crank (FIG. 2); his crank member is swung out by a stepper motor 33 in the cycles of the weaving process.
  • the stepping motor 33 is fastened to a cantilever 34 of a guide rod 35 which can be displaced longitudinally axially on the frame G and which is moved back and forth in the weaving direction in the rhythm of the weaving process.
  • the longitudinal displacement of the guide rod 35 takes place by means of a further stepping motor 36.
  • the free end of the gripper 32 describes a spatial curve which it spends from the outlet disk 19 to the entrance of the respective seam weaving compartment 11.
  • a fabric guide 37 formed from sheet metal is arranged on each half of the machine, by means of which both fabric ends of the fabric 7 are opened against one another in a funnel-shaped or conical manner and are thus prepared for the separation of the weft threads 10.
  • the arrangement of the disk separator 14, which is rotatably mounted in the frame G, and the fabric guide 37 (see FIG. 7) ensure that the knife edge 27 (FIG. 6) on the inlet disk 16 directly at the foot of the protruding from the fabric 7 and with a the additional weave 38 (FIG. 2, also FIG. 7), which has come about as a result of the partial weaving described above, engages weft threads 10 provided on the outer edge.
  • This procedure enables the weft threads 12 to be woven in to be clamped at their front ends by the respectively assigned gripper 32 (FIG. 1).
  • the grippers 32 are guided on the space curve described above in such a way that the respective front end of the respective weft thread 12, which is clamped by the associated gripper 32, is brought past the disk separator 14 and the first weft thread guide 28 at the level of the respective seam weaving compartment 11.
  • a turning of the guide rods 35 is prevented by means of keys 40.
  • At the rear end of each guide rod 35 a set of teeth 41 is attached.
  • gear wheels 42 which engage in toothings 41 of the guide rods 35, these perform a defined movement in the axial direction of the disk separators 14.
  • the rotary movements of the stepper motors 33 and 36 are coordinated.
  • the insertion arm 43 ' must be located within the cavity formed by the fabric 7 to be woven, because otherwise the insertion of the insertion arm into the seam weaving compartment 11 would not be spatially possible.
  • Each plug arm 43 is provided with a toothing 45; the required straight-line oscillating movement takes place via the toothing 45 in that, as already mentioned, the plug-in arms are mounted in the frame G such that they can rotate and are driven by stepper motors 46 which perform reversing movements.
  • the sley 6 is rotatably mounted in the frame G and is driven by a stepper motor 47, as shown in FIG. 8.
  • the weaving strips 38 separated from the weft threads 10 by the thermal cutting devices 39 are wound onto the winding rollers 49 with the aid of the stepping motors 48.
  • the woven strips 38 still connected to the weft threads 10 are firmly connected to the clamping device 9 at the end of the clamping device 9 by means of clamping devices 50.
  • the frame G is displaceably mounted on guide rails 2 and is displaced from one end of the fabric band to be woven to the other end during the weaving process.
  • This shift takes place step by step, namely in the cycle of the seam weaving process, in that the frame G is moved step by step by the stepping motor 3 via a tooth connection 51, 52.
  • the disk separator 14 described here takes up a number of weft threads 10 in the course of the separation in the manner of a memory. Because the disk separator 14, which is driven by the stepping motor 25, rotates step by step in the cycle of the weaving process, the separated weft threads 10 travel over the thread-like disks 16 to 18 from the inlet disk 16 to the outlet disk 19, where - as already described - the weft yarn 12 arriving there is picked up by the gripper 32.
  • this separator can only be used economically for fabrics with equally strong fabric threads.
  • a simpler disk separator 53 must be used for economic reasons.
  • This consists of a ring 54, on the outer surface of which a metric thread 55 corresponding to the direction of rotation of the disk separator is cut, as well as an inlet disk 16, a single thicker disk 18 and an outlet disk 19.
  • the inlet disk, thicker disk and outlet disk are designed as in the previous embodiment described.
  • the metric thread 55 on the ring 54 has the task of preventing the weft threads 10 from being taken along in the feed direction of the seam weaving machine during the advancement of the seam weaving machine and thus the weft thread 10 not always being drawn in by the run-in disk 16 onto the disk separator 53.
  • the basic arrangement of the disk separator 53 in the seam weaving machine is shown in FIG. 9.
  • the release of the weft thread 12 to be woven in from the binding of the weaving strip 38 is achieved by correspondingly raising and lowering auxiliary warp threads 56 by means of auxiliary lifting elements 57 articulated on the jacquard cords, which are controlled by the jacquard machine 5.
  • the released weft thread 12 is spatially separated from the weft threads 10 with the aid of the outlet disk 19.
  • Both disc separators 14, 53 require extremely precise guidance of the fabric to be woven in relation to the seam weaving machine, approximately in the order of magnitude of 0.1 mm, both in the individual step from thread to thread and in the sum of the process steps from the beginning of the fabric band and up to it The End. This means that the seam weaving machine must always be able to offset the individual step errors against each other, a requirement that can only be satisfied by means of complex sensor technology.
  • the spatial separation of the weft threads and their subsequent guiding down to the respectively formed compartment is accomplished by an air flow coming from an air nozzle 58 (FIG. 10).
  • the weft thread 10 integrated in the woven strip 38 is brought together with the woven strip from a woven strip guide 59 to the air nozzle 58, the woven strip 38 being brought out of its original vertical position into an approximately horizontal position.
  • the air nozzle 58 blows into a wind tunnel formed from three aerodynamically shaped guide plates 60, 61, 62 (FIGS. 11 and 12).
  • a tensioning occurs, through which the respective weft thread 12 springs out of the weaving order.
  • the weft thread 12 which has jumped out is picked up by the air stream and guided through the wind tunnel 60, 61, 62 until its front end reaches before the opening of the main compartment (seam weaving compartment) 11 which has just been formed in the same work cycle.
  • the plug-in arm 43 'described above grips it with its weft thread clamping device 44' and pulls it through the seam weaving compartment 11.
  • the further procedure takes place as in the first exemplary embodiment.
  • the air nozzle 58 is integrated in the woven strip guide 59 in order to save space. It is connected to an air supply line 65 via a solenoid valve 64.
  • the solenoid valve 64 is controlled by sensors (not shown) which signal the point in time at which the plug arm 43 'begins its working stroke.
  • the woven strip 38 is fastened to the clamping device 9 outside the seam weaving machine. During the operations of weaving the fabric ends together, the weaving strip 38 stands still while the frame G moves with the seam weaving machine.
  • the derogatory auxiliary warp threads 56 of the web strip 38 are wound onto the winding roller 49. Since the respective web strip 38 must be guided exactly from thread to thread relative to the seam weaving machine when disc separators 14, 53 are used, it is absolutely necessary that the take-up roll 49 is stretched exactly in time with the seam weaving method, which controls the driving stepper motor very precisely 48 requires.
  • auxiliary warp threads 56 which are no longer used on the winding roller 49 and are no longer used, are held in tension by means of an unwinder roller 68 which is connected to the winding roller 49 in an axially and rotationally fixed manner, around which the rope 67 is wound on which the drive weight 66 depends.
  • the rope 67 is deflected from the originally vertical position into a horizontal position (indicated by dashed lines in FIGS. 11 and 12) and brought up to a deflection roller 69, from which the drive weight 66 then hangs down.
  • a deflection roller 69 from which the drive weight 66 then hangs down.
  • a liquid flow can be used as a guide instead of an air flow, e.g. Water or a water emulsion.
  • an air flow e.g. Water or a water emulsion.
  • the effect is basically the same, although the air flow creates a back pressure while the water flow creates an impulse.
  • the weft threads can also be separated by means of electrical field forces by electrostatically charging the weft threads and the street over which the individual weft thread is to be guided with the same poles. To do this, two opposing capacitor plates are used (not shown).
  • the weft thread 12 is separated and guided up to the plug-in arm 43 'by means of air flow, liquid flow or electrostatics, regardless of the accuracy of the guide steps. This significantly simplifies the control of the seam weaving machine.
  • the woven strip 38 does not need to come about exclusively by partially weaving out the textile web 4, but can instead take in auxiliary warp threads 56 that are woven into the fabric and are foreign to the fabric. This measure means that you are no longer bound to the specified number of stems for the type of tissue.
  • an additional separator namely a needle separator 70 in the form of one with at least one soft steel needle 71 used as a brush-provided brush, cf. 13.
  • the steel needles 71 tear the weft thread 12, which is in each case to be woven in, out of the weave; the weft thread 12 is then brought into the respectively open seam weaving compartment 11 in the manner described above.
  • the tubular plug arm 43 ' is in a continuous through-hole with a longitudinal axial blind hole 72' and an overlying one Threaded bore 73 'provided sliding element 74' firmly screwed into the longitudinal axial threaded bore 73 '.
  • the sliding element 74 ' is with its blind hole 72' on one approximately pipe 75 ' plugged, which is inserted through a hole in the thicker leg of an L-shaped pivot arm 76' (Fig. 18).
  • the right-angled swivel arm 76 ' (FIG. 15) can be rotated with its leg arranged in the seam weaving direction on a base plate 79' screwed into a base plate 79 'firmly screwed to the teeth 45' on the plug-in arm 43 'and secured against loosening by a nut 80' is stored and is clamped with the aid of a tension spring 82 ', which is clamped between a pin 83' mounted in the arm of the swivel arm 76 'arranged at right angles to the seam weaving direction and a second pin 84' screwed into the base plate 79 'and against one in the base plate 79' screwed-in stop pin 85 'so that the substantially flatter leg of the swivel arm 76' is aligned exactly at right angles to the direction of the seam weave.
  • An internal thread 86 ' is cut at the end of the guide tube 75' mounted in the swivel arm 76 '.
  • a compression spring 87' located in the guide tube 75 ' can be pretensioned against the sliding element 74' which is displaceable on the guide tube 75 'by means of a threaded pin 89' secured against unintentional loosening.
  • the sliding element 74 ' is supported on the steel wires 90', 91 ', which form the weft thread clamping device 44'. These steel wires are soldered into a clamping plate 92 'which is fixedly connected to the swivel arm 76' and are passed through the plug-in arm 43 'designed as a tube and through a plastic plug 93' screwed into its front end and provided with a longitudinal axial bore.
  • each of the two steel wires 90 ', 91' which form the actual weft thread clamping device 44 ', is initially aligned in an arc shape and therefore has a bracing which strays away from the original longitudinal direction or from the longitudinal direction of the plug arm 43' designed as a tube and containing the steel wires.
  • each steel wire 90 ', 91' is twisted twice and forms a «V» with unequal legs in plan view, the shorter inner leg of which continues in the shape of a curve.
  • the arcuate orientation of one steel wire 90 ' is opposite to the arc shape of the second steel wire 91', as shown in FIG. 19.
  • the opening and closing of the weft thread clamping device 44 ' is effected by a relative displacement of the plug arm 43' mounted in the sliding element 74 'compared to the steel wires which are soldered into the clamping plate 92' screwed to the swivel arm 76 'and passed through the plug arm 43' and the plastic plug 93 ' 90 ', 91' causes.
  • the weft thread 12 ' originally warp thread, picked up by the weft thread clamping device 44', due to its firm clamping in the fabric 7 and its predetermined length due to the partial weaving of the original weft threads 8, now warp threads, results in the fact that after the insertion of the plug arm 43 'which has been carried out, the Weft thread 12, originally warp thread, creates a tensile force in the weft thread 12 through the seam weaving compartment 11 upon reaching the stretched position of the weft thread 12 against the spring force of the tension spring 82 'which approaches the right-angled swivel arm 76' against the rear stop bolt 85 'and this with the further retraction of the Plug poor 43 ' increasing tensile force of the weft thread 12, originally warp thread, causes the L-shaped swivel arm 76' to rotate counter to the seam weaving direction until it abuts a front stop pin 99 '.
  • the pivoting movement of the L-shaped swivel arm 76 ′ triggered by the tensile force of the weft thread 12 in the stretched position creates a reaction force which brings the weft thread 12 into a position parallel to the woven seam 13.
  • the rearward reversal point of the lifting movement of the plug-in arm 43 ' is designed such that, after this parallel position has been reached, the weft thread 12 is pulled out of the weft thread clamping device 44'.
  • the weft thread clamping device 44 ' picks up the now weft thread 12 at the end of the seam weaving compartment 11.
  • the weft thread clamping device 44 ' is then caused to pull out of the seam weaving compartment 11 via the toothing 45', the weft thread 12 also being pulled through.
  • This sley 6 regulates firstly the insertion of the weft thread onto the fabric and secondly the maintenance of the defined distance between the individual warp threads.
  • a displacement of the weft thread 12, originally warp thread, introduced into the corresponding seam weaving compartment 11 and added by the weaving drawer 6, and also the warp threads 8, originally weft thread, against one another is no longer possible without external influence, even when the seam weaving compartment 11 is still open, since this is caused by the weaving process
  • Predefined wave structure of the warp threads 8, originally weft threads, and the weft threads 12, originally warp threads, are positively prevented.
  • each individual type of fabric requires a special weaving drawer 6; however, the manufacture of a woven drawer is quite complex.
  • the sley 6 has only one task of pushing the respective weft thread 12 onto the seam 13. Since it is not possible to move the now warp threads 8 and the now weft threads 12 against one another even with the seam weaving compartment 11 still open due to the thread structure, in a further embodiment of the invention the pushing of the weft thread 12 onto the woven seam 13 can also be carried out using a needle roller rotatable in the frame G. 100 (Fig. 21) which can be used in the same shape for all types of tissue.
  • the needle roller 100 which is rotatably mounted in the frame, essentially consists of a shaft 101 on which two opposing rows of needles, consisting of a plurality of flexible needles 102, are arranged helically along their longitudinal axis.
  • the first of these helical, opposing rows of needles is right-handed and the second opposite row is left-handed.
  • the needle roller 100 is driven by a stepper motor 103, wherein it executes a rotary movement which is limited to 180 ° in the cycle of the weaving process and then stops.
  • the individual needles 102 of the needle roller sweep past the weft thread 12, originally warp thread, which is added to the weaving seam 13 and leave scratch marks on it. Such scratch marks can possibly cause damage to the fabric tape in the area of the woven seam 13.
  • the weft threads 12 can be pushed into the seam weaving compartment 11 by means of Z-shaped needles 104, which are arranged next to one another in a guide bed 1-05, are individually axially displaceable and reach into the seam weaving compartment at their front Z end (Fig. 22).
  • the guide bed 105 is fixedly connected to the frame G and consists of a base plate 106 and two guide rods 107 fixedly mounted in this base plate 106, onto which rigid bend plates 109 and spacer sleeves 110, which are alternately provided with two bores 108, are pushed, whereby first a plate 109, then a spacer sleeve 110 follows on each guide rod 107, etc., lastly a sheet 109.
  • Each spacer sleeve 110 has a length corresponding to the cross section of a Z-needle 104 and thus enables the longitudinal axial displacement of the associated Z-needle from the one spacer sleeve 110 to the next.
  • the height distance of the guide rods 107 in the region of the base plate 106 spanning the woven seam 13 is dimensioned such that the Z needles 104 fit in between the base plate 106 and the lateral surface of each of the spacer sleeves 110 pushed onto the guide rods 107 without play (FIGS. 22 and . 24).
  • This construction of the guide bed means that the Z needles 104 can be moved back and forth in the weaving direction in a manner that prevents rotation.
  • the shift of the Z-needles 104 for the purpose of pushing in the weft thread 12, originally warp thread, introduced into the corresponding seam weaving compartment 11 are carried out against the seam weaving direction by means of a link 111 with a first third of the total length of the backdrop 111 perpendicular to the seam weaving direction, in the second third arcuately against the seam weaving direction and in the last third again groove 112 machined at right angles to the seam weaving direction, the total length of the link 111 being three times the width of the woven seam and the individual Z needles 104 engaging in the groove 112 with their rear end.
  • the backdrop 111 is slidably mounted on two special backdrop guide rods 113 at right angles to the seam weaving direction.
  • the link guide rods 113 are mounted on one side of the base gap 106 in a sliding element 115 which is displaceable in the base plate 106 in the seam weaving direction and biased against the seam weaving direction by an adjustable compression spring 114 (coil spring or compressed air cylinder).
  • the common displacement of the two link guide rods 113 and thus also the link 111 mounted on them is therefore necessary so that the gradual advance of the frame G does not have a tolerance-related effect on the insertion of the weft thread 12, originally warp thread, introduced into the seam weaving compartment 11 onto the woven seam 13 can have (Fig. 26).
  • the link 111 is fixedly connected to a toothed belt drive 116 (or rope drive) and is shifted by this with the help of a stepping motor 117 in the cycle of the seam weaving process from the corresponding side of the seam 13 to the other side and vice versa.
  • the Z-needles 104 bent in a Z-shape and engaging with the rear end in the groove 112 of the link 111 in succession each perform an axial shift corresponding to the groove path up to the woven seam 13 and back to the starting position.
  • the link 111 described above has the disadvantage that a relatively high friction occurs due to the deflection of the needle ends in the arcuate central part of the groove 112 between the Z-needles 104 and the link 111. This friction leads to increased wear and also to an increase in the drive power for the link 111.
  • the axial displacement of the Z-needles 104 is no longer caused by the arcuate curve piece of the groove 112 in the second third of the total length of the Setting 111 causes, but by a rotatable roller 118 used in place of the curve piece (Fig. 27).
  • the drive power for pushing in the weft thread 12, originally warp thread can be compared the sley 6 conventionally used in weaving technology and also lowered relative to the needle roller 100.
  • the jacquard machine 5 has a sufficient number of cords 119, it is possible to achieve a three-stage lifting of the warp threads 8.
  • the cords 119 of the jacquard machine 5 are connected to one another by connecting the first cord with the six hundredth cord, the second cord with the six hundredth cord, the third cord with the five hundred and ninety-ninth cord, and so on, with an example number of 601 cords .
  • the interconnected cords 119 form loops which run around a summing roller 120. This device shortens the time course of the seam weaving process by about half without the working speed of the individual functions of the seam weaving machine having to be increased (FIG. 28).
  • a special cord 122 is attached to an axis of rotation 121 of the summing roller 120, in which a main lifting element 123 for the respective warp thread 8 is inserted. In the further course of the cord 122, it is guided around a rotatably mounted deflection roller 124 and fastened to a tension spring 125 suspended in the frame G.
  • the jacquard machine 5 is controlled in a known manner by punch cards.
  • the jacquard perforated card in question is punched according to the rhythm of the weaving process and makes it possible to raise the main lifting element 123 in three stages and thus simultaneously form two seam weaving compartments 11, 11 ' , the seam weaving compartment 11 being created above and the seam weaving compartment 11 ' being below the weaving center (shown in Fig. 29).
  • a second jacquard machine 126 can be attached in addition to the jacquard machine 5, which are rotatably connected to one another via a common shaft 127.
  • the cords 119, 128 of the two jacquard machines 5, 126 are now connected to one another crosswise from machine to machine according to the principle described above, for example by the first cord 119 of the first jacquard machine 5 corresponding to the one corresponding first cord 128 of the second jacquard machine 126, etc.
  • the simultaneous formation of two seam weaving compartments 11, 11 'then takes place as described above, in that the punch cards of the two jacquard machines 5, 126 are matched accordingly.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
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Claims (16)

1. Procédé pour réaliser une jonction tissée entre deux extrémités ouvertes d'un tissu, en particulier pour confectionner une bande tissée sans fin, notamment pour l'industrie du papier; ce-procédé consistant à détisser partiellement en franges les extrémités du tissu à raccorder, et à constituer avec les fils de trame détissée des nappes de fils de jonction disposés en chaîne, pour réaliser la jonction tissée, en y incorporant les fils de chaîne des extrémités détissées, qu'on traite alors en fils de trame; le procédé étant caractérisé en ce qu'on ménage dans la texture du tissu (7) à raccorder une bande auxiliaire de liaison (38), partiellement séparée du tissu d'origine, et reliée seulement à celui-ci par des fils de chaîne (10) d'origine destinés à être traités en fils de trame; cette bande auxiliaire servant à retenir en position les nouveaux fils de chaîne (10), dans l'ordre voulu pour réaliser la jonction tissée; en ce qu'on prélève automatiquement les nouveaux fils de trame (10) un par un, pour effectuer le tissage de jonction, en retirant ces fils de la bande auxiliaire (38), en les séparant (14, 53, 58, 70), en les prenant un par un par passes successives au moyen d'organe de saisie et de guidage (32, 43, 44, 58, 60, 61, 62) commandés pas-à-pas, pour amener un fil de trame à chaque passe, en regard de la foule (11) formée par deux nappes entrouvertes de fils de chaîne, et pour faire passer ainsi le fil de trame dans la foule, le repousser contre la ligne de tissage (13), et l'emprisonner en place en formant une nouvelle foule (11') à l'envers de la première; et en ce qu'on assure de manière coordonnée l'avance du métier servant à réaliser la jonction tissée, et l'avance des deux extrémités du tissu (7) à raccorder, en opérant de préférence en synchronisme avec la cadence de tissage, de manière à faire correspondre chaque phase du mouvement relatif du métier à tisser de jonction et des extrémités du tissu à raccorder, à chaque passe d'exécution de la jonction tissée.
2. Procédé conforme à la revendication 1, caractérisé en ce qu'on utilise un rouleau spécial à aiguilles (100), pour repousser le fil de trame (12, 12') contre la ligne de tissage définie par les nappes de fils de chaîne (12, 12'), au lieu de le faire avec un battant (6).
3. Procédé conforme à l'une des revendications 1 ou 2, caractérisé en ce que l'on conserve l'ordre de rangement de tissage des nouveaux fils de trame (10) qui étaient précédemment des fils de chaîne, en fixant ces fils en lisière, notamment par collage ou par soudage.
4. Procédé conforme à l'une des revendications 1 ou 2, caractérisé en ce qu'on assure le rangement de tissage des nouveaux fils de trame au moyen de fils de chaîne dégarnis du tissu d'origine, traités maintenant en fils de trame (10).
5. Procédé conforme à l'une des revendications 1 à 4, caractérisé en ce qu'on utilise un courant d'air, pour saisir et guider un par un les fils de trame (12, 12') à engager dans la jonction tissée.
6. Procédé conforme à l'une des revendications 1 à 5, caractérisé en ce qu'on utilise un dispositif de sectionnement, pour introduire ce dispositif en regard de la ligne de tissage (13) dans la foule formée par les nappes entre-ouvertes (11, 11') de fils de chaîne, après chaque mouvement d'inversion de ces nappes, pour sectionner séparément ou ensemble chaque fil de trame (12,12') ou chaque paire de fils de trame (12,12').
7. Procédé conforme à l'une des revendications 1 à 6, caractérisé en ce qu'on réalise en trois phases le mouvement de soulèvement des fils de chaîne (8), anciens fils de trame, pour constituer en même temps deux foules distinctes (11, 11'), dans chacune desquelles on introduit un fil de trame (12, 12'), en opérant dans des sens opposés.
8. Dispositif pour réaliser le procédé conforme à l'une des revendications 1 à 7, en vue de confectionner une jonction tissée entre deux extrémités de tissu; caractérisé en ce qu'il comporte deux demi-métiers à tisser (M, M') installés symétriquement, à l'opposé l'un de l'autre, mais par ailleurs identiques; chacun de ces demi-métiers comportant un certain nombre d'organes auxiliaires de soulèvement (57), pour libérer automatiquement les nouveaux fils de trame (10, 10' ), pris dans la chaîne du tissu à raccorder; ces organes auxiliaires de soulèvement (57) étant fixés à des cordons de manoeuvre d'une machine Jacquard (5), commune aux deux demi-métiers; et les fils de chaîne, qui étaient initialement des fils de trame du tissu à raccorder, étant passés chacun dans un oeil de l'un des organes auxiliaires de soulèvement (57); un séparateur (14, 53, 58, 70), commandé en synchronisme avec la cadence de tissage, étant prévu pour prendre un par un les fils de trame (12), en les séparant du reste des fils de trame (10, 10'); un organe mobile d'accrochage (32), également commandé en synchronisme avec la cadence de tissage, étant prévu pour saisir l'extrémité libre du fil de trame (12) sortant du séparateur, et pour amener le fil de trame (12) dans la foule constituée par les nappes entre-ouvertes (11, 11 1) des fils de chaîne de la jonction tissée, à chaque passe du tissage de celle-ci; l'organe d'accrochage comportant à cet effet un bras télescopique (43', 43), pourvu d'une pince (44', 44) pour saisir l'extrémité libre du fil de trame (12, 12') et la faire passer dans la foule formée par les nappes (11, 11') des fils de chaîne.
9. Dispositif conforme à la revendication 8, caractérisé en ce qu'il repose sur un bâti (G), qui porte les deux demi-métiers (M, M'), et qui est monté à coulisse sur un système de mise sous tension (9), où le tissu (7) à raccorder par une jonction tissée se trouve disposé sous tension sur toute sa largeur.
10. Dispositif conforme à l'une des revendications 8 ou 9, caractérisé en ce que chacun des séparateurs (14, 53) est analogue à une vis d'Archi- mède, et formé d'un assemblage de disques (17, 18), alternativement minces et épais, enfilés sur un arbre commun (15); l'épaisseur de chacun des disques épais (18) correspondant à l'épaisseur de chacun des fils de trame (10) à incorporer dans le tissage; et la différence de diamètre entre les disques épais (18) et les disques minces (17) étant suffisante pour loger chacun des fils (10) entre les deux disques de chaque paire; le premier disque du séparateur, en allant à l'envers du sens du tissage, étant un disque d'entrée (16) et le dernier disque, vue dans le même sens, étant un disque de sortie (19); et chacun des disques minces (17) et des disques épais (18) étant découpé latéralement, et cambré à la manière d'un filet de vis.
11. Dispositif conforme à l'une des revendications 8 ou 9, caractérisé en ce que chaque séparateur (53) ne comporte qu'un seul disque épais (18), monté entre une bague (55) filetée sur sa surface extérieure, associée au disque d'entrée (16), et le disque de sortie (19).
12. Dispositif conforme à l'une des revendications 8 ou 9, caractérisé en ce que chaque séparateur est constitué par un canal de soufflage, formé de déflecteurs en tôle (60, 61, 62) de profil aérodynamique, associés à une buse de soufflage d'air (58); le courant d'air produit par la buse de soufflage se trouvant guidé dans le canal de soufflage (60, 61, 62), pour saisir et guider chaque fil de trame (12), à tour de rôle.
13. Dispositif conforme à l'une des revendications 8 à 12, caractérisé en ce qu'il comporte, à l'endroit de départ de chacun des fils de trame (12) libérés à tour de rôle de la bande de liaison auxiliaire (38), un séparateur à aiguilles (70), constitué par un arbre qui tourne en synchronisme avec la cadence de tissage, et qui porte au moins une aiguille de séparation (71), montée perpendiculairement sur cet arbre.
14. Dispositif conforme à l'une des revendications 8 à 13, caractérisé en ce qu'il comporte un bras d'accrochage télescopique tubulaire (43'), dont le mouvement est commandé dans le sens du tissage et en synchronisme avec la cadence de tissage; le bras d'accrochage (43') étant monté sur une équerre à deux branches (76'), de manière à pouvoir pivoter vers l'extérieur, et à pouvoir aller et venir dans la foule constituée, à chaque passe de tissage, par les nappes associés (11) de fils de chaîne; le bras tubulaire (43') contenant au moins un élément en fil d'acier (90', 91 ') fixé à l'équerre (76') et présentant une extrémité libre coudée en saillie hors de l'extrémité libre du bras tubulaire (43'); l'élément en fil d'acier pouvant coulisser à l'intérieur du bras tubulaire (43'), pour saisir le fil de trame (12) et le pincer entre son extrémité coudée et l'extrémité adjacente du bras tubulaire; et pour libérer ensuite ce fil de trame (12), après sa mise en place dans la foule formée par les nappes (11) de fils de chaîne, grâce à un mouvement approprié du bras d'accrochage (43'), suivi d'un mouvement de retrait du bras hors des nappes de fils de chaîne (11), en synchronisme avec la cadence de tissage.
15. Dispositif conforme à l'une des revendications 8 à 14, caractérisé en ce qu'il comporte un arbre à aiguilles (100), pour repousser le fil de trame (12) dans la foule formée par les nappes (11) de fils de chaîne, à chaque passe de tissage; le rouleau à aiguilles (100) étant monté rotative- ment sur le bâti (G), et soumis à un mouvement de rotation pas-à-pas; ce rouleau portant un grand nombre d'aiguilles souples (102) disposées suivant deux rangées hélicoïdales diamétralement opposées, l'une de ces rangées hélicoïdales étant de pas à droite, et l'autre rangée de pas à gauche.
16. Dispositif conforme à l'une des revendications 8 à 15, caractérisé en ce qu'il comporte un système d'aiguilles (104) recourbées sensiblement à angle droit, et présentant par exemple un profil en Z, pour repousser le fil de trame (12) dans la foule formée par les nappes (11) de fils de chaîne, à chaque passe de tissage; les aiguilles (104) étant montés parallèlement dans un support de guidage (105), de manière à pouvoir y coulisser dans le sens axial; chaque aiguille (104) ayant une extrémité postérieure engagée dans une rainure de profil curviligne (112), ménagée dans un coulisseau (111) animé d'un mouvement alternatif, en synchronisme avec la cadence de tissage; l'extrémité libre recourbée de chaque aiguille (104) étant engagée dans les nappes (11) des fils de chaîne, qui forment la foule de tissage, et le profil curviligne de la rainure (112) du coulisseau assurant le mouvement de va-et-vient de chaque aiguille (104) pour repousser le fil de trame (12).
EP81104197A 1980-07-09 1981-06-02 Procédé et dispositif pour réaliser une jointure tissée comme liaison entre deux bouts de tissu Expired EP0043441B2 (fr)

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DE3025909A DE3025909C2 (de) 1980-07-09 1980-07-09 Verfahren und Vorrichtung zum Herstellen einer Webnaht zwischen zwei Gewebeenden

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446941A1 (de) * 1984-12-21 1986-07-03 F. Oberdorfer, 7920 Heidenheim Verfahren zur herstellung einer stecknaht zum endlosmachen eines gewebebandes und nahtungsmaschine
DE3733120A1 (de) * 1987-09-30 1989-04-13 Wangner Gmbh Co Kg Hermann Hilfsvorrichtung an einer nahtmaschine zum endlosmachen von flachgewebten kunststoffsieben mittels einer webnaht
DE8814443U1 (de) * 1988-11-18 1990-03-22 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Kupplungsvorrichtung zum Anhängen von Gewichten an Zugfäden
DE9211353U1 (de) * 1992-08-24 1994-01-05 Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen Halterung für das Webblatt einer Nahtwebmaschine
DE9215427U1 (de) * 1992-11-12 1994-04-07 Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen Nahtwebmaschine zum Endlosmachen eines Kunststoffgewebes mit einer unterhalb des Webfaches angeordneten Jacquardmaschine

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EP0043441A1 (fr) 1982-01-13
CA1161239A (fr) 1984-01-31
ATE9724T1 (de) 1984-10-15
DE3025909A1 (de) 1982-02-04
DE3025909C2 (de) 1983-07-14
DE3166429D1 (en) 1984-11-08
US4410015A (en) 1983-10-18
EP0043441B2 (fr) 1988-03-16

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