EP3347513B1 - Module et métier à tisser présentant un dispositif ainsi qu'un procédé de maintien, d'amenée et d'insertion de fils de trame dans une foule - Google Patents

Module et métier à tisser présentant un dispositif ainsi qu'un procédé de maintien, d'amenée et d'insertion de fils de trame dans une foule Download PDF

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Publication number
EP3347513B1
EP3347513B1 EP16758151.1A EP16758151A EP3347513B1 EP 3347513 B1 EP3347513 B1 EP 3347513B1 EP 16758151 A EP16758151 A EP 16758151A EP 3347513 B1 EP3347513 B1 EP 3347513B1
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EP
European Patent Office
Prior art keywords
clamp
weft
weft thread
weaving machine
clamps
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EP16758151.1A
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German (de)
English (en)
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EP3347513A1 (fr
Inventor
Markus Gielen
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP3347513A1 publication Critical patent/EP3347513A1/fr
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    • 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
    • D03D47/12—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
    • D03D47/125—Weft holding devices
    • 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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the present invention relates to a loom with a device for holding, feeding and entering weft threads in a shed of the loom. Furthermore, a corresponding method is presented.
  • Such a method shows, for example, the EP 902109 A1 .
  • This device works with piezo clamps, with the help of which weft threads are alternately positioned vertically and transferred to the gripper with a pivot drive.
  • EP 1367159 A2 , the EP 644286 A , the DE 1937134 and DE 3524727 A1 show devices and methods for holding and feeding weft threads to the gripper of a loom.
  • the EP 0240075 A2 describes a system of zuutzenden terminals, which are arranged side by side on the entry side of the loom. Each of these zuturden terminals is brought by means of its own drive in each case in three different positions A, B, C. These are each a standby position (A), a feed position (B) and a takeover position (C).
  • Another problem is that with an independent drive of the zuutzenden terminals on the entry side of the loom an illegal Crossing two successive weft threads in the weaving cycle can not be excluded. Such a crossing can occur when a newly entered weft thread, which is moved by means of its zubringeposition on the way, the path of the weft thread immediately before crossed, which is transported after the weft insertion from the reed towards the binding point of the fabric.
  • the object of the present invention is to provide a weaving machine with an apparatus and a method with which more time is available for the movement of the clamps to be supplied from the standby position into the feed position and in which a crossing of weft threads on the feed side is avoided becomes.
  • the weaving machine is equipped with a device for holding and feeding weft threads to the looper of the loom. Furthermore, with a first and a second terminal, as well as with a first and a second drive, which are each associated with a terminal, so that the two terminals are movable independently of one another on trajectories in a respective Zubringeposition, a takeover position and a standby position. These three positions are arranged on an entry side of the loom outside of a shed or next to the fabric edge of the loom.
  • the respective feed position of the clamps is located in an area between the track of the gripper and the outwardly extended stop line of the reed.
  • the stop line here is the foremost position of the reed in the warp direction of the weaving machine when striking the weft thread to the binding point of a fabric.
  • the feed position is now chosen so that the respective weft thread runs in this position of the clamp between the weft supply or other guide means on the loom and the associated terminal, that it can be detected by the gripper during the entry movement of the gripper into the shed.
  • the position of the stop line and also in dependence on the design of the gripper while the Zubringeposition in the weaving machine can also be higher or lower than the career of the gripper or the stop line. The closer the respective feed position of a clamp is to the gripper, the shorter the weft thread ends which are taken along by the gripper when this weft thread is introduced onto the other fabric side.
  • the transfer position of the terminals to be applied serves to allow the weft thread entered by the gripper into the weaving sheave to be taken over again by the respectively associated clamp after a transport of the weft thread in the direction of the stop line of the weaving machine or the binding point of the weave. Then the clamp with the weft thread can be returned to the ready position.
  • the respective takeover positions of the clamps are in the region of the outwardly extended stop line of the weaving machine. They are arranged so close to the stop line or the fabric edge that the acquisition of the moving from the reed in the direction of the stop line weft thread is supported by the respective terminal.
  • the clamped weft thread is kept ready by the clamp to be applied until it is again his turn, depending on the specifications of the weave pattern, to be entered into the shed.
  • the terminal to be delivered, with the weft thread clamped therein is brought into the feeding position close to the gripper of the weaving machine.
  • the respective readiness position of the terminals is in an area above the respective transfer position and above the respective transfer position. It is assumed that the weaving plane is arranged in the usual way so that the shed is formed by a substantially vertical movement of the warp threads.
  • the described arrangement of the trajectories also creates the conditions that at least one of the two clamps with the clamped end of the next to be introduced weft yarn movement from the respective standby position of this terminal towards their respective Zubringeposition can start very early in the weaving cycle. This results from the fact that the closed shape of the movement path, a movement of a terminal from its standby position is possible in its Zubringeposition without this terminal gets into its transfer position.
  • Similar construction of the drives and the terminals and by appropriate arrangement on the weaving machine can then be achieved that a terminal does not reach the vicinity of the transfer position of the other terminal in the movement from its standby position to its Zubringeposition.
  • drives are designed such that the delivery position, the transfer position and the readiness position of the first terminal lie in a first movement plane, while the feeder position, the transfer position and the standby position the second clamp in a second, different from the first plane of movement plane of movement.
  • the device for holding and feeding the weft threads modular.
  • a favorable modular design results from the fact that the drive is arranged with the associated terminal each on a separate housing or a support plate. This ensures that similar modules of drive, housing and terminal can be arranged differently on the weaving machine depending on the number and requirements.
  • the modules of drive, housing and clamp are arranged on the weaving machine such that the planes of movement of the clamps are angled relative to one another at an angle which lies in a vertical plane extending in the weft direction of the weaving machine.
  • adjustment means are provided with which the start of movement of the clamps with the clamped end of the next to be introduced weft thread from the respective standby position in the feed position in the weaving cycle of the loom is adjustable.
  • This setting means may be, for example, a programmable controller for the drives of the terminals, the setting or programming via an input menu on the control panel of the loom.
  • a weft scissors is usually arranged in the region between the entry-side fabric edge and the transfer position of the terminals.
  • the existing terminals and their drives are preferably constructed identically, so that they can be arranged modularly on the loom.
  • a module for holding and feeding a weft thread to the gripper of a loom comprises a housing or a carrier plate, as well as a Clamp for the weft.
  • a drive is provided, with which the clamp along a trajectory in different positions is movable.
  • the module is characterized in that the drive includes a linkage, which is designed such that the path of movement of the clamp has a self-contained form. This shape is, for example, circular or elliptical.
  • this feature provides an advantage because a clamp can move along its trajectory from the standby position to the feed position along a portion of the trajectory that does not contain the takeover position.
  • each of the terminals moves on its way from the standby position to the feed position on a movement path that does not run in the vicinity of the transfer position of another terminal. This reduces the risk of crossovers between two weft threads inserted alternately. This means that the start of movement of a clamp from its standby position can already be done in the feed position before the previously entered weft thread is struck against the stop line of the loom.
  • An embodiment of the module according to the invention comprises a drive with a motor and a linkage with a crank, which is driven by the motor. Furthermore, a push rod is provided, which is connected to the crank and which is displaceably mounted in a sliding joint. The sliding joint is mounted with respect to the housing of the module in a pivot point. Finally, there is a clip for the weft, the clip being most suitably attached to the tip of the push rod.
  • the motor of the joint gear may be, for example, a stepping motor, whose movement start and movement speed is freely programmable or adjustable via appropriate control units.
  • the movement of the terminal successively in the predefined positions along the associated path of movement takes place in the present embodiment with the same direction of rotation of the motor. If, however, the same weft thread is entered twice in succession in two consecutive weaving cycles, the direction of rotation of the motor can also be reversed so that, for example, a clamp is moved directly from the takeover position back into the feed position.
  • the clamps are most conveniently located at the tip of a needle-like push rod forming part of the above-described linkage.
  • the clamps can be designed, for example, as spring clip terminals, in which the respective weft thread is clamped or pulled out with the spring-loaded clamp closed.
  • actively controllable terminals is particularly advantageous.
  • piezoelectric terminals in question which are electrically controlled (for example, as in EP 902109 A1 ) or pneumatically or electromagnetically controlled terminals or combinations of these principles of action.
  • the module described within the push rod on a pneumatic cylinder with a pneumatic piston.
  • a piston rod is provided, which is connected to the pneumatic piston.
  • the clamp of the module is connected to the piston rod in such a way that Actuation of the pneumatic cylinder, the terminal can be opened or closed.
  • At least two weft threads and at least one gripper for inserting the weft threads into the shed formed by the warp threads are present.
  • the entry of the weft threads takes place from an entry side of the weaving machine.
  • the weft threads are preferably entered alternately in different successive weaving cycles.
  • the method is also applicable to applications with more than two weft threads, which are then held by a correspondingly larger number of terminals and spent the drool.
  • With the aid of a first and second drive each associated with a terminal, the terminals are moved independently on associated trajectories in three different positions, namely in each case a Zubringeposition, a takeover position and a standby position.
  • the drives of the terminals are designed and arranged on the weaving machine for carrying out the method that the trajectory of each terminal has a self-contained form and that each terminal by means of the associated drive in three along the respective Trajectory successively arranged positions is moved, namely the feeder position, the transfer position and the ready position.
  • each of the clamps is moved on its trajectory from the respective standby position to the feeder positions, without thereby reaching the intermediate takeover position.
  • the start of movement of the movement of at least one of the two clamps is from its standby position to its delivery position in the weaving machine weaving cycle in a period of time extending from the beginning of the stop movement of the reed to the abutment line of the weaving machine until the abutment of the previously inserted weft thread.
  • the timing described is made possible by the independent drives of the terminals. These are controlled in such a way that the clamp with the weft thread to be entered next does not wait with its movement towards the gripper until the striking, taking over and cutting of the last weft thread entered has taken place. Rather, the movement of the clamp begins with the next to be entered weft earlier in the weaving cycle than was possible in the prior art.
  • the weft threads kept ready usually extend starting from the standby positions of the clamps in the direction of the weft supply arranged outside the weaving machine.
  • the course of the threads takes place on straight lines which intersect the entry-side raceway of the gripper above the gripper.
  • the weft yarns kept ready in the direction of the weft supply usually run through a series of yarn guides or yarn loops, which are also arranged offset behind the gripper in the weft direction side by side.
  • Said thread guides or eyelets may be part of a device known in the art weaving machines whose function is usually to select depending on the weave pattern currently weft to be inserted and to move this weft in the trajectory of the gripper that this Capture weft thread and enter into the shed. This is usually done by a substantially vertical movement of said eyelets from a position above and - seen in the warp direction - behind the entry-side trajectory of the gripper in a lower position.
  • the so-called first clamp in the context of the invention is that clamp which is arranged closer to the center of the weaving machine or also closer to the entry-side fabric edge than the second clamp.
  • the ready positions of the terminals are thus arranged offset to one another in the weft direction. This also applies mutatis mutandis when using more than two weft threads with more than two terminals.
  • the weft thread to be introduced in the next weaving cycle is a so-called first weft thread in the context of the invention. That is the one weft thread that is brought from a designated here as the first terminal terminal from the respective standby position in the respective feed position.
  • the weft thread to be introduced in the next weaving cycle is a so-called second weft thread in the context of the invention. That is, a weft thread, which is brought from a designated here as a second terminal terminal from the respective standby position in the respective feed position.
  • the start of movement of the first takes place in case A) Clamp from its standby position to its weaving position in the weaving cycle in a range between 20 degrees to 0 degrees before the abutment of the immediately preceding first weft at the binding point of the fabric or at the stop line of the loom.
  • Zubringeposition and takeover position result in the implementation of the method under certain circumstances different thread lengths in the course of weft from the respective terminal on the eyelets of the color selector to the weft supply.
  • additional actively driven deflection - for example, several pulleys - in the course of the weft thread the described different thread lengths can be compensated in the course of the weft.
  • a corresponding yarn retrieval is, for example, in the DE 3524727 A1 described.
  • weft thread it may also be useful to support the acquisition of the damaged weft thread by the associated terminal in the transfer position by additional measures. That can be one Be movement of the clamp in the vertical direction, through which an example hook-like open clamp can detect the transverse weft presented. But this can also be thread guide elements, which are arranged laterally on the reed and press in the stop movement, the laterally projecting thread end of the weft thread in the ready terminal. Such elements, for example, discloses EP 0240075 A1 , Separately actively driven thread guides in the area of the stop line are also conceivable for such a function.
  • the Figures 1 - 3 show schematic partial views of the entry side of a loom.
  • Several weft threads - in the present example two weft threads 1, 2 - are deducted from different supply spools 3.
  • the weft threads 1, 2 are alternately brought into the line of movement of a gripper 6 by means of a device 4 for selecting weft threads - or weft colors - and a device 5 for holding and feeding weft threads and inserted by the latter into a shed 7.
  • the shed 7 is formed in a known manner by warp threads 8. After the weft insertion of the registered weft thread 2 is brought from a reed 9 to the stop line 10 of the loom or to the binding point of the fabric 13.
  • the weft thread 2 reaches into the region of a clamp 12, which receives it in a takeover position 20. Subsequently, the weft 2 between the clamp 12 and the fabric edge 14 cut by means of a cutting device 15. This results in two sections of the weft thread 2. The one section remains in the fabric 13 and is transported with this in the direction of a - not shown - puller.
  • the clamp 12 is connected to the other section or the thread end of the weft thread 2 in a - in the Figures 1-3 not shown - prepared position 21 above the transfer position 20.
  • the yarn end of this weft yarn 2 is brought by means of the clamp 12 in a Zubringeposition 19 near the gripper 6.
  • the eyelet 22 of the device 4 for selecting weft threads (for example, a color picker) is moved downwards. In this way, the weft thread 2 enters the path of the gripper 6 and can be detected by this.
  • the Figures 1 - 3 show the situation in which the thread end of a first weft thread 1 is held by a first clamp 11 above the weaving plane in a first ready position 18.
  • the first clamp 11 is arranged at the tip of a first push rod 23, which is mounted in a first housing 24 and connected within the first housing 24 with a first drive 25, which will be explained later.
  • the first weft thread 1 runs on its way from the weft supply 3 - for example from a yarn package and possibly even by a Vorspul réelle - via the eyelet 22 of a color selector 4 to the first terminal 11th
  • the second weft thread 2 is in the representation according to the Figures 1 - 3 in the shed 7, after it was entered immediately before by the gripper 6. It is shown how the reed 9 moves the registered second weft thread 2 in the direction of the stop line 10 of the loom. Outside of the shed 7, the second weft thread 2, starting from the weft supply 3 - similar to the first weft thread 1 - via a lowered eyelet 22 of the color selector 4 to the shed 7. In the region of the extension of the stop line 10 is a second terminal 12 in its transfer position 20.
  • the second terminal 12 is arranged at the tip of a second push rod 27 which is mounted in a second housing 28 and is connected within the second housing 28 to a second drive 29.
  • the two housings 24, 28 with the drives 25, 29 for the terminals 11, 12 are formed in principle similar and arranged in the present case mirror images and offset from each other.
  • the second weft thread 2 is next transported to the stop line 10 of the weaving machine and thus struck at the binding point of the fabric 13.
  • the second weft thread 2 dives under the first weft thread 1 held in the first clamp 11.
  • FIG. 2 illustrated crossing of the two weft threads 1, 2 is canceled from this moment on.
  • the troubled second weft thread 2 is introduced at the stop in the second terminal 12.
  • the terminal 12 is pneumatically opened for this purpose. How the control of the clamps 11, 12 is carried out will be described below ( FIG. 12 ).
  • the second weft thread 2 After the second weft thread 2 has been detected by the second clamp 12, it is closed. Subsequently, the second weft thread 2 is cut between the second clamp 12 and the entry-side fabric edge 14 by a cutting device 15 designed as a weft scissors. Then, the second clamp 12 is brought to the new end of the second weft yarn 2 in the ready position 21 of the second terminal 12 (S. FIG. 4 ). The associated eyelet 22 of the color selector 4 is raised in this process. Even during the recording of the second weft thread 2 through the second clamp 12, the first clamp 11 moves with the first weft thread 1 from its standby position 18 in the Zubringeposition 16. At the same time moves the associated eyelet 22 of the color selector 4 down.
  • the gripper 6 begins its movement in the direction of the shed 7 and thereby detects the first weft thread. 1 At the moment in which the gripper 6 detects the first weft thread 1, the first terminal 11 is pneumatically opened.
  • the control mechanism is similar in construction to the second clamp 12 and will be discussed below. Now, the first weft thread 1 is entered into the shed 7. This situation is in FIG. 4 shown.
  • the illustrated delivery position 16 of the first clamp 11 is close to the gripper 6.
  • the ready position 21 of the second clamp 12 lies approximately in the middle between stop line 10 and gripper 6 - but above the feeder position 19 and above the transfer position 20. The location of the various predefined Positions will continue below with the help of FIGS. 5 to 8 described.
  • the Figures 1 - 4 also show that the gripper 6 is guided in the present embodiment, outside the shed 7 of a mounted on the loom guide rail 30.
  • the gripper 6 is attached to a gripper bar 32, via which the gripper 6 is advanced into the shed 7 and withdrawn.
  • a gripper bar 32 via which the gripper 6 is advanced into the shed 7 and withdrawn.
  • other forms of grippers and guide rails 30 can be used.
  • the gripper 6 detects the weft thread 1 presented transversely.
  • the gripper 6 is equipped with clamping elements 31 which are actively actuated by controls, not shown.
  • the gripper 6 as a clamping element 31 and a spring-loaded gripper clamp only possible that does not need to be actively opened to accommodate the thread can.
  • Such gripper clamps are known in the art.
  • the rigid gripper bar 32 is used - but it can also be a flexible band used.
  • the gripper bar 32 or a corresponding rapier band are reversibly driven by a transmission - such transmissions are known in the art and are therefore not further illustrated.
  • FIGS. 5 to 7 show in a schematic way details of a module 33 for holding and feeding a first weft thread 1 to the gripper 6 of a loom.
  • the Figures 5 -7 each differ by the position of the clamp 11, which holds the weft thread 1 and the gripper 6 brings.
  • individual modules 33, 34 for holding and feeding each of a weft thread 1, 2 are basically the same structure, but in this case arranged in pairs mirror-inverted placed on the loom.
  • the drive 25 is in the present case designed in the manner of a sliding-crank mechanism. Some parts of the drive 25 are housed in a housing 24.
  • the drive 25 includes a rotatably mounted in the housing 24 sliding joint 37, a crank 38 and a push rod 23 which is rotatably mounted or displaceable on the crank 38 and the sliding joint 37.
  • the push rod 23 which carries the clamp 11, displaceable.
  • the sliding joint 37 is rotatable about a pivot point 39 with respect to the housing 24. Compressed air 40 can be supplied via the sliding joint 37, with the aid of which a small pneumatic cylinder 41 can be actuated inside the push rod 23 (see FIG. FIG. 12 ).
  • the push rod 23 is fixed to the crank 38 of the slider-crank mechanism in a rotary joint 42.
  • the crank 38 is driven by a motor 43 rotating.
  • the module 33 for holding and feeding the first weft thread 1 is connected to an electronic control unit 44 for the drive 25 of the terminal 11 and for the control of the pneumatic to open the terminal 11 in connection.
  • This electronic control unit 44 for the clamp 11 communicates with a control, not shown, of the weaving machine and with a source of compressed air outside the weaving machine. Data can be exchanged between the control of the loom and the control of the terminal 11. This data also includes, for example, information about the instantaneous position of the various moving elements in the weaving cycle as well as the speed of the weaving machine. Also provided on the control unit 44 for the clamp 11 or on the loom control are means for setting or programming the control unit 44 for the clamp 11.
  • These devices are also a determination of the start of movement of the terminal 11 from one of its predefined positions 17 - 19 in another predefined position 17 - 19. Furthermore, with these means for adjusting the terminals 11 and the times for opening and closing of the terminal 11 in Web cycle can be specified.
  • the direction of rotation of the drive 25 or the direction of movement of the clamp 11 on its path of movement 35 can also be determined via the control unit 44 and the devices for setting or programming the clamp 11.
  • the motor 43 which drives the weft holding and feeding module 33, is mounted outside the housing 24 and is connected to the crank 38 inside the housing 24 via a shaft, not shown. Details of the terminal 11 are in the FIG. 12 shown below. This description applies mutatis mutandis to a similar module with the second terminal 12th
  • FIG. 8 shows the arrangement of the present elliptical trajectories 35, 36 for a device 5 with two modules 33, 34 for driving two terminals 11, 12th
  • the view is similar to FIG. 2 - but enlarged.
  • the weft threads 1, 2 were in FIG. 8 not drawn.
  • On the trajectories 35, 36 are in FIG. 8 each of the two terminals 11, 12 shown in the three predefined positions: 16 Feeding position of the first clamp 17 Transfer position of the first terminal 18 Ready position of the first terminal 19 Feeding position of the second clamp 20 Transfer position of the second terminal 21 Standby position of the second terminal
  • two modules 33, 34 for holding and feeding a weft thread fan-shaped inclined to each other.
  • the planes of motion are angled with respect to one another at an angle which lies in a vertical plane running in the weft direction of the weaving machine. How to get in FIG. 8 sees, is achieved by the fact that the longitudinal axes of the two elliptical trajectories 35, 36 of the two clamps 11, 12 strive upwards apart.
  • the ready positions 18, 21 of the two Terminals 11, 12 in the weft direction a greater distance from each other than the Zubringepositionen 16, 19 of the two clamps 11, 12.
  • the Zubringepositionen 16, 19 turn in the weft direction have a similar distance from each other as the two takeover positions 17, 20th
  • the FIGS. 8 and 9 also show that the weft holding and feeding modules 33, 34 are arranged so that the planes of movement of the two clamps 11, 12 are angled with respect to the warp direction of the loom by an angle lying in a horizontal plane of the loom. As a result, the delivery positions 16 of the clamps 11, 12 are at a greater distance from the fabric edge 14 than the transfer positions 17, 20.
  • FIGS. 1 . 2 . 3 and 4 show the situation in the event that the weft thread to be introduced in the next weaving cycle is a so-called first weft thread 1 in the context of the invention (see case A above). That is, next, the first weft thread 1 is brought from the first terminal 11 from the standby position 18 to the feeder position 16.
  • first terminal or “second terminal” defined by the fact that the ready position 18 of the first terminal 11 closer to the entry side fabric edge 14 arranged as the Standby position 21 of the second terminal 12.
  • the standby positions 18, 21 of the terminals 11, 12 are thus arranged offset to one another in the weft direction.
  • the assignment of the weft yarns 1,2 to the eyelets or thread guides 22 of the color selector 4 is analogous to the assignment of the weft yarns 1,2 to the terminals. That is, the eyelet or thread guide 22 for the second weft thread 2 has a greater distance from the fabric edge 14 than the eyelet 22 for the first weft thread.
  • the movements of the clamps 11, 12 are now controlled in the weaving cycle so that the above-described, kinematically induced thread crossings of the weft threads 1, 2 can not lead to a disturbance in the weaving process.
  • the start of movement of the first terminal 11 is set or programmed from its standby position 18 in its Zubringeposition 16 in the weaving cycle of the loom that the Beginning of movement takes place about 10 degrees before the stop of the immediately previously entered second weft yarn 2 to the binding point.
  • first weft thread 1 first crosses the course of the immediately previously entered second weft thread 2, after this second weft thread 2 during transport through the reed 9 in the direction of the stop line 10 under the first weft thread 1 clamped in the first clamp 11 has been moved through (s. Figures 2 and 3 ).
  • Case B the process illustrated above as Case B) is illustrated.
  • the weft thread to be introduced in the next weaving cycle is a so-called second weft thread 2 in the context of the invention. That is, it is about the entry of a weft thread 2, which is brought from its standby position 21 in the Zubringeposition 19 and there detected by the gripper of a here designated as a second terminal 12 terminal, while the previously registered first weft thread 1 from the reed 9 to the Stop line 10 is transported or struck.
  • FIG. 12 shows in enlarged views details of the first terminal 11, and the push rod 23 with slide joint 37 and pneumatic cylinder 41.
  • the push rod 23 is slidably mounted in the sliding joint 37 in the longitudinal direction.
  • the sliding joint 37 has a pivot point 39, via which it is rotatably mounted in the housing 24.
  • the push rod 23 contains inside a pneumatic cylinder 41 which is acted upon by compressed air 40 on the upper side. By the compressed air 40, the piston 45 is pressed together with the piston rod 46 and the clamp 11 attached thereto down. As a result, the clamp 11 is opened at the tip of the push rod 23 (clamp 11 ').
  • the piston 45 When switching off the compressed air 40 via a pneumatic valve, not shown, the piston 45 is pressed together with the piston rod 46 upwards by the force of a spring 47 - the terminal 11 is closed.
  • the compressed air 40 is passed through an opening 48 in the push rod 23 in the pneumatic cylinder 41.
  • the opening 48 has the shape of a slot which is positioned so that the clamp 11 can be pneumatically opened and closed in the feed position 16 and in the take-over position 17.

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  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (10)

  1. Métier à tisser avec un dispositif (5) pour tenir et amener des fils de trame (1, 2) à un préhenseur (6) du métier à tisser, avec une première et une seconde pinces (11, 12) pour serrer les fils de trame (1, 2), ainsi qu'avec respectivement un entraînement (25, 29) pour chacune des deux pinces, au moyen duquel les deux pinces (11, 12) peuvent être déplacées indépendamment l'une de l'autre le long de trajectoires de déplacement (35, 36) dans une position d'amenée (16, 19), une position de transfert (17, 20) et une position de disponibilité (18, 21) respectives, dans lequel ces trois positions sont disposées sur un côté d'insertion du métier à tisser, et dans lequel les positions d'amenée (16, 19) respectives des pinces (11, 12) sont disposées dans une zone située entre une trajectoire du préhenseur (6) et un prolongement d'une ligne de butée (10) d'un peigne (9) du métier à tisser, et dans lequel les positions de transfert (17, 20) respectives des pinces (11, 12) sont situées dans une zone de prolongement de la ligne de butée (10), et dans lequel les positions de disponibilité (18, 21) respectives des pinces sont disposées dans une zone au-dessus de la position d'amenée et de la position de transfert (16, 19 ; 17, 20), caractérisé en ce que les entraînements (25, 29) des pinces sont conçus et disposés sur le métier à tisser de sorte que la trajectoire de déplacement (35, 36) de chaque pince présente une forme fermée sur elle-même, sachant que chaque pince (11, 12) peut être déplacée au moyen de l'entraînement (25, 29) associé dans les trois positions disposées l'une après l'autre le long de la trajectoire de déplacement (35, 36), à savoir la position d'amenée (16, 19), la position de transfert (17, 20) et la position de disponibilité (18, 21), et en ce que la pince (11, 12) respective peut être déplacée de sa position de disponibilité (18, 21) dans ses positions d'amenée (16, 19) sans, ce faisant, accéder à sa position de transfert (17, 20) disposée intermédiairement.
  2. Métier à tisser avec un dispositif (5) selon la revendication 1, dans lequel les entraînements (25, 29) des pinces se présentent sous une forme telle que les trajectoires de déplacement (35, 36) des pinces s'étendent respectivement dans des plans de déplacement.
  3. Métier à tisser selon la revendications 1 ou 2, dans lequel l'entraînement (25, 29) de chaque pince est disposé respectivement sur sa propre caisse ou sur une plaque de support (24, 28).
  4. Métier à tisser selon la revendications 3, dans lequel des modules (33, 34) sont disposés avec un entraînement (25, 29), une caisse (24, 28) et une pince (11, 12) sur le métier à tisser de sorte que les plans de déplacement des pinces (35, 36) soient inclinés par rapport à un sens de chaîne du métier à tisser d'un angle situé dans un plan horizontal du métier à tisser.
  5. Métier à tisser selon la revendications 3 ou 4, dans lequel des modules (33, 34) sont disposés avec un entraînement (25, 29), une caisse (24, 28) et une pince (11, 12) sur le métier à tisser de sorte que les plans de déplacement des pinces (35, 36) soient inclinés les uns par rapport aux autres selon un angle qui se trouve dans un plan vertical s'étendant dans le sens de la trame du métier à tisser.
  6. Métier à tisser selon l'une des revendications 1 à 5, dans lequel des moyens de réglage électroniques ou de programmation sont présents, au moyen desquels le début du mouvement des pinces (11, 12) de leur position de disponibilité (18, 21) respective vers leur position d'amenée (16, 19) respective peut être réglé ou programmé dans le cycle de tissage du métier à tisser.
  7. Module (33, 34) pour tenir et amener un fil de trame (1, 2) au préhenseur (6) d'un métier à tisser, avec une caisse ou une plaque de support (24, 28), ainsi qu'avec une pince (11, 12) pour le fil de trame (1, 2), ainsi qu'avec un entraînement (25, 29) au moyen duquel la pince (11, 12) peut être transférée dans différentes positions (16-18, 19-21) le long d'une trajectoire de déplacement (35, 36), caractérisé en ce que l'entraînement (25, 29) contient un mécanisme articulé, qui se présente sous une forme telle que la trajectoire de déplacement (35, 36) de la pince présente une forme fermée sur elle-même, de sorte que la pince (11, 12) puisse être déplacée au moyen de l'entraînement dans trois positions (16-18, 19-21) disposées les unes après les autres le long de la trajectoire de déplacement (35, 36) et la pince (11, 12) puisse être déplacée de la dernière de ces trois positions dans la première des trois positions sans, ce faisant, accéder à la seconde position située intermédiairement.
  8. Module (33, 34) selon la revendication 7, dans lequel l'entraînement (25, 29) contient un moteur (43) et dans lequel le mécanisme articulé présente une manivelle (38) qui peut être entraînée par le moteur (43), avec en outre une tige de poussée (23, 27) qui est reliée à la manivelle (38) et qui est montée de manière coulissante dans un joint coulissant (37), sachant que le joint coulissant (37) est monté dans un point de pivotement (39) par rapport à la caisse (24, 28) du module (33, 34), avec en outre une pince (11, 12) pour le fil de trame, sachant que la pince (11, 12) est fixée sur la tige de poussée (23, 27).
  9. Module (33, 34) selon la revendication 8, dans lequel la tige de poussée (23, 27) contient un vérin pneumatique (41) avec un piston pneumatique (45) et avec une tige de piston (46), sachant que la pince (11, 12) est reliée à la tige de piston (46) de sorte que la pince (11, 12) puisse être ouverte ou fermée par actionnement du vérin pneumatique (41).
  10. Procédé pour tenir, amener et insérer des fils de trame (1, 2) dans une foule (7) d'un métier à tisser, sachant que deux fils de trame (1, 2) au moins et un préhenseur (6) au moins sont présents pour insérer les fils de trame (1, 2), ainsi qu'avec au moins une première et une seconde pinces (11, 12), ainsi qu'avec au moins un premier et un second entraînements (25, 29), au moyen duquel les pinces sont déplacées indépendamment l'une de l'autre sur des trajectoire de déplacement (35, 36) différents dans des positions (16-18, 19-21) différentes, avec en outre des moyens (15) pour couper le fil de trame (1, 2) inséré, sachant que des cycles de tissage successifs du métier à tisser comprennent les étapes de procédé suivantes:
    déplacer la première pince (11) avec une extrémité d'un premier fil de trame (1) serrée en elle d'une position de disponibilité (18) de la première pince dans une position d'amenée (16) de la première pince;
    saisir le premier fil de trame (1) par le préhenseur (6) ;
    insérer le premier fil de trame (1) dans la foule (7);
    déplacer la première pince (11) dans une position de transfert (17) de la première pince;
    mettre en butée le premier fil de trame (1) contre une ligne de butée (10) du métier à tisser au moyen d'un mouvement de butée d'un peigne (9);
    prendre en charge du premier fil de trame (1) par la première pince (11);
    couper le premier fil de trame (1) de sorte qu'il se forme une nouvelle première extrémité de fil de trame;
    déplacer la première pince (11) avec la nouvelle extrémité du premier fil de trame (1) qui y est serrée de la position de transfert (17) de la première pince dans la position de disponibilité (18) de la première pince;
    déplacer la seconde pince (12) avec une extrémité d'un second fil de trame (2) serrée en elle d'une position de disponibilité (21) de la seconde pince dans une position d'amenée (19) de la seconde pince;
    Saisir le second fil de trame (2) par le préhenseur (6) ;
    insérer le second fil de trame (2) dans la foule (7);
    déplacer la seconde pince (12) dans une position de transfert (20) de la seconde pince;
    mettre en butée le second fil de trame (2) à la ligne de butée (10) du métier à tisser au moyen du mouvement de butée du peigne (9);
    prendre en charge le second fil de trame (2) par le second peigne (12);
    couper le second fil de trame (2) de sorte qu'il se forme une nouvelle seconde extrémité de fil de trame;
    déplacer la seconde pince (12) avec la nouvelle extrémité du second fil de trame (2) qui y est serrée de la position de transfert (20) de la seconde pince dans la position de disponibilité (21) de la seconde pince;
    le procédé étant caractérisé en ce que les entraînements (25, 29) des pinces sont conçus et disposés sur le métier à tisser de sorte que la trajectoire de déplacement (35, 36) de chaque pince présente une forme fermée sur elle-même, et que chaque pince (11, 12) est déplacée au moyen de l'entraînement (25, 29) associé dans trois positions disposées l'une après l'autre le long de la trajectoire de déplacement (35, 36), à savoir la position d'amenée (16, 19), la position de transfert (17, 20) et la position de disponibilité (18, 21), et en ce que la pince (11, 12) respective peut être déplacée de la position de disponibilité (18, 21) dans les positions d'amenée (16, 19) sans, ce faisant, accéder à la position de transfert (17, 20) disposée intermédiairement,
    sachant que le début de mouvement du mouvement de l'une au moins des deux pinces (11, 12) de sa position de disponibilité (18, 21) dans sa position d'amenée (16, 19) dans le cycle de tissage du métier à tisser étant situé dans une période de temps qui s'étend du début du mouvement de butée du peigne (9) jusqu'à la butée du fil de trame (1, 2) précédemment inséré contre la ligne de butée (10) du métier à tisser.
EP16758151.1A 2015-09-10 2016-08-29 Module et métier à tisser présentant un dispositif ainsi qu'un procédé de maintien, d'amenée et d'insertion de fils de trame dans une foule Active EP3347513B1 (fr)

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US10472745B2 (en) 2019-11-12
AU2016318569A1 (en) 2018-03-15
US20180291538A1 (en) 2018-10-11
JP6682622B2 (ja) 2020-04-15
KR20180048693A (ko) 2018-05-10
CN108350626B (zh) 2020-06-05
CN108350626A (zh) 2018-07-31
WO2017042039A1 (fr) 2017-03-16
CA2996462A1 (fr) 2017-03-16
JP2018530681A (ja) 2018-10-18
EP3347513A1 (fr) 2018-07-18
TW201723254A (zh) 2017-07-01
RU2018112569A (ru) 2019-10-10
DE102015217356B3 (de) 2016-10-20

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