EP1777329A1 - Métier à tisser à projectile - Google Patents

Métier à tisser à projectile Download PDF

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Publication number
EP1777329A1
EP1777329A1 EP05023633A EP05023633A EP1777329A1 EP 1777329 A1 EP1777329 A1 EP 1777329A1 EP 05023633 A EP05023633 A EP 05023633A EP 05023633 A EP05023633 A EP 05023633A EP 1777329 A1 EP1777329 A1 EP 1777329A1
Authority
EP
European Patent Office
Prior art keywords
projectile
thread
shed
weaving machine
weft
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.)
Withdrawn
Application number
EP05023633A
Other languages
German (de)
English (en)
Inventor
Markus Farner
Alex Simeon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP05023633A priority Critical patent/EP1777329A1/fr
Priority to PCT/EP2006/009472 priority patent/WO2007039242A2/fr
Publication of EP1777329A1 publication Critical patent/EP1777329A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/24—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by gripper or dummy shuttle
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—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
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/26—Picking mechanisms, e.g. for propelling gripper shuttles or dummy shuttles
    • D03D49/28—Driving mechanisms for the picker stick
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D03J5/06—Dummy shuttles; Gripper shuttles

Definitions

  • the invention relates to a projectile loom with at least one accelerating device for at least one projectile for the weft insertion.
  • the energy for launching the projectile into the shed is usually provided by a torsion bar which is fixedly secured in the machine at one end and carries an accelerating member at its other end, with which the Projectile can be acted upon. Before firing the projectile, the torsion bar is twisted and then released. The result energy released is transmitted to the projectile via the acceleration element, thereby accelerating it.
  • a weaving machine is for example in the EP 0 181 413 A1 described.
  • the present invention has for its object to provide a powerful and cost-effective projectile loom.
  • the object is achieved with a projectile weaving machine with at least one acceleration device for at least one projectile for weft insertion according to the invention that the acceleration device has a non-uniformly translating gear for driving a movable against the projectile acceleration element, which shoots the projectile in the shed formed during the weaving process and that the weaving machine has an acceleration device for the at least one projectile on both sides of the shed.
  • the gear may have eccentrically mounted and / or different from the round shape gears to achieve the required short-term high acceleration of the accelerator element. It may also be provided a curve drive.
  • the acceleration element in this case a lever, can be used to accelerate the projectile via the central drive of the weaving machine.
  • the accelerating device may also have its own motor, such as an electric motor, preferably an asynchronous motor.
  • the energy necessary for the acceleration of the projectile can be made available immediately after the weaving machine has been switched on.
  • the design of the transmission is easier in the presence of its own drive. It is understood that hydraulic or pneumatic drives for the accelerator device can be used.
  • the weaving machine according to the invention can also have in known manner on one or both sides of the shed a device for selecting the supplied from different yarn stores weft threads.
  • the efficiency of the loom can be increased by the fact that the device for selecting the weft threads has a plurality of adjacently arranged and transversely to the weft insertion direction linearly displaceable thread tongs.
  • Known devices for selecting a weft thread, in particular for color selection have a plurality of rotationally adjustable thread clamps which optionally supply the projectile with its weft thread. However, the adjustment of these clamps is more complex than the linear displacement of the thread tongs in the selection device of the weaving machine according to the invention.
  • this selection device can be used with advantage also in weaving machines with another principle of weft insertion, ie also in rapier looms or drag shuttle looms.
  • this use in classic projectile weaving machines with a torsion bar drive of the projectile is possible.
  • a motor-driven traction means preferably an endless rope or an endless belt may be provided for the displacement of the thread tongs on which the thread tongs are attached.
  • a cable drive with a stepper motor is cheaper than a drive with a Linear motor.
  • Chain and belt drives via one or two rollers can also be used.
  • Each of the thread tongs can optionally be brought into a selection position, from which it can be moved to the thread transfer to the projectile and thread takeover to the fabric edge.
  • the selection position is in the extension of the longitudinal axis of the projectile.
  • the driver can be attached to a driven traction means, preferably an endless rope or an endless belt, which can achieve the same advantages as in the movement of the thread tongs.
  • a further increase in the efficiency of the weaving machine according to the invention can be achieved by providing thread tensioner with a plurality of winding arms for each weft thread supplied by yarn stores on one or both sides of the shed, wherein the winding arms are individually driven and preferably driven individually.
  • thread tensioners are known in looms, which tension the weft by means of cams. In order to influence the different tensions of the different weft threads, the use of various cams is necessary. The loom must be shut down. With the new thread tensioners, however, an individual tension of the weft threads according to their properties even when the weaving machine is running possible.
  • the thread tensioner according to the invention can also be used in other weaving machines not described here.
  • the thread tensioner according to the invention can be used alone wherever it is necessary to tension a single thread or several threads during the operation of a device. With the thread tensioner described here threads of different types can be individually tensioned or loaded.
  • the drive of the winding arms depending on the yarn properties of the individual weft threads can be controlled such that the thread tension remains constant or regulated variable.
  • the timing and speed of winding can be adjusted individually to the individual yarn qualities.
  • a device for braking the at least one projectile having two relatively movable jaws that clamp the projectile side and thereby decelerate.
  • This device can be used simultaneously to hold the projectile in a defined launch position prior to launch.
  • the jaws are open, but support the projectile from below and form a lateral guidance at the start.
  • projecting from below into the shed support elements may be provided which guide the at least one projectile during its flight through the shed from below and to the side.
  • Known support elements for projectiles are C-shaped and therefore lead the projectile on the top, which, however, creates a higher friction and thus not as high speeds of the projectile can be achieved as in a leadership of the projectile exclusively from below and from the sides.
  • the projectile loom according to the invention can also be characterized by a new design of the projectiles for weft threads, which are different can optimize in terms of efficiency and cost.
  • the at least one projectile can have a clamping device for a weft thread at both ends.
  • the two clamping devices allow to enter the projectile from both sides in the shed, without having to rotate it beforehand.
  • the clamping devices can also be designed differently, in particular have different clamping surfaces and clamping forces, so that weft threads of different quality can be entered. By providing two clamping devices at the ends of the projectile also the weft waste can be minimized.
  • Fig. 1 shows a projectile loom 10 in its essential components in a perspective view.
  • the projectile weaving machine 10 is designed for a weft insertion from both sides in the shed formed during the weaving process, which is indicated by two warp threads 12, 13.
  • the shed through which the projectile is transported, lies on the opposite side of the heald 43, which can not be seen in the figure. It has a symmetrical aggregate arrangement on both sides of the shed.
  • two acceleration devices 14, 14 'for projectiles, two weft selection devices 15, 15', two braking devices 16, 16 'and two thread tensioning devices 17, 17' are provided. These units are shown and described more clearly in the following figures 2 to 6.
  • the heald 43 of the loom 10 can be seen.
  • FIG. 2 shows an enlarged detail view of the acceleration device 14 with an electric motor 18, which drives an acceleration element 20 via an unevenly translating gear 19, wherein the acceleration element 20 is movable against a projectile 21, in particular FIG. 4, and thereby shoots it into the shed
  • the transmission 19 shown here has a plurality of elliptical gears 22, 23, 24, 25, which are also mounted eccentrically. It can also be provided a cam drive to cause the momentary strong acceleration of the accelerator element. With the help of this transmission 19, the required short-term and strong acceleration of the acceleration element 20 can be achieved over a certain angular range.
  • the acceleration device 14 'arranged on the other side of the shed is constructed identically to the acceleration device 14.
  • FIGS. 3a, b show the weft selection device 15 of the weaving machine 10 from FIG. 1.
  • the device 15 has eight juxtaposed thread tongs 26.1 to 26.8 off.
  • Each of the thread tongs 26.1 to 26.8 is supplied from thread stores, not shown here, by means of eyelets 27 arranged in a plate (not shown), wherein the individual weft threads may differ from one another, in particular in color.
  • the thread tongs 26.1 to 26.8 are releasably attached to an endless rope 28, which is guided over a deflection roller 29 and driven by a stepping motor 30.
  • the thread tongs 26.1 to 26.8 can be moved transversely to the longitudinal direction of the projectile 21, so that each of the thread tongs 26.1 to 26.8 can be brought into a selection position in which it is located in the extension of the longitudinal axis of the projectile 21.
  • the thread tongs 26.1 is in the selection position and at the same time has been moved from this to the projectile 21.
  • the thread tongs 26.1 can pass the weft thread held by it to a clamping device of the projectile 21.
  • the thread tongs move to the edge of the fabric in order to retain the weft thread after the entry (reduction of weft yarn waste).
  • the thread tongs 26.1 moves back into the selection position in which it is again parallel to the other thread tongs 26.2 to 26.8.
  • a driver 31 is provided which is engageable with each of those thread pliers, which is in selection position.
  • the driver 31 is also attached to an endless cable 32 which is driven by an electric motor 33.
  • Fig. 3b shows one of the Fig. 3a corresponding representation, but now the thread tongs 26.3 has been brought into selection position and moved from the driver 31 to the projectile 21 to.
  • FIG. 4 shows the thread tongs 26.1 and the projectile 21 from FIG. 3a in an enlarged view.
  • the thread tongs 26.1 moves into a U-shaped recess 34 at the end of the projectile 21.
  • a here not closer apparent clamping device of the projectile 21 is arranged, the weft of the Thread tongs 26.1 takes over.
  • the clamping device of the projectile 21 is actuated by a lever 35 and a magnet arrangement 36.
  • the projectile 21 is formed symmetrically to its central transverse axis 37 and therefore has at its other, not visible in Fig. 4 end also a clamping device which is actuated by a lever 35 '. From Fig. 4 can also be seen how the driver 31 engages with a projection 31.1 in a groove 38 on the underside of the thread pliers 26.1.
  • Fig. 5 the thread tensioner 17 of the loom 10 is shown in more detail. He has a total of eight winding arms 39.1 to 39.8, which are each driven by a separate electric motor 40.1 to 40.8. Each of the winding arms 39.1 to 39.8 can wind the end of a weft thread as soon as the weft thread has been cut off. The end is held clamped by the thread tongs 26.1 to 26.8, the weft threads passing through the eyelets 27 coming from the winding arms 39.1 to 39.8.
  • the winding arms 39.1 to 39.8 serve as a buffer for the weft yarns to keep the yarn tension constant.
  • the single-motor drive of the winding arms 39.1 to 39.8 makes it possible to wind each weft individually according to its properties so that the thread tension remains constant. Switching to weft threads of other qualities is possible without conversion measures on the weaving machine and while the machine is running simply by a corresponding change in the control of the motors 40.1 to 40.8. In addition, it is by the thread tensioner 17 with the individually driven winding arms 39.1 to 39.8 easier to provide weft yarns of different qualities for the fabric, as in mechanically operating thread tensioners according to the prior art.
  • Fig. 6 finally shows the braking device 16 in an enlarged view.
  • the braking device 16 has two clamping jaws 16.1 and 16.2, which are movable relative to one another in the direction of arrows 16.3 and the projectile 21 can pinch between them.
  • the jaws 16.1, 16.2, as shown in Fig. 6, open they support the projectile 21 in the firing position both laterally and from below.
  • the acceleration element 20 of the accelerator 14 can be moved against the end of the projectile 21 and thereby shoot it into the shed 11.
  • b support members 42 are provided which support the projectile 21 during its flight through the shed 11 from below and laterally.
  • the support elements 42 are formed substantially U-shaped.
  • a guide rail 44 is arranged, which leads the respective thread pliers, here the thread tongs no. 1, from the selection position in a transfer position of the weft thread to the projectile 21 to the fabric edge and back to the selection position.
  • the endless cable 32 which holds the driver for the thread pliers, is held on a support 45 via deflection rollers. 46 shows the front opener for the thread tongs, which takes over the weft thread near the fabric edge. After the takeover, the weft is cut off. The necessary cutting device is not shown in the figure.
  • a projectile loom 10 having two accelerators 14, 14 'for at least one weft insertion projectile, wherein at least one accelerator 14, 14' comprises a non-uniformly translating gear for driving an acceleration member 20 movable against the projectile, which projects the projectile into the during the Web operation formed shed 11 shoots, and that on both sides of the shed 11 each have an accelerator 14, 14 'is provided.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP05023633A 2005-10-01 2005-10-28 Métier à tisser à projectile Withdrawn EP1777329A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05023633A EP1777329A1 (fr) 2005-10-01 2005-10-28 Métier à tisser à projectile
PCT/EP2006/009472 WO2007039242A2 (fr) 2005-10-01 2006-09-29 Metier a tisser a projectile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05021547 2005-10-01
EP05023633A EP1777329A1 (fr) 2005-10-01 2005-10-28 Métier à tisser à projectile

Publications (1)

Publication Number Publication Date
EP1777329A1 true EP1777329A1 (fr) 2007-04-25

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ID=37547704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05023633A Withdrawn EP1777329A1 (fr) 2005-10-01 2005-10-28 Métier à tisser à projectile

Country Status (2)

Country Link
EP (1) EP1777329A1 (fr)
WO (1) WO2007039242A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103132213A (zh) * 2011-12-02 2013-06-05 江南大学 一种小样织机双气缸控制剑杆的快速引纬方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE678468C (de) * 1937-01-31 1939-07-15 Tefag Textil Finanz A G Schuetzenschlagvorrichtung fuer Webstuehle
DE2742088A1 (de) * 1977-08-24 1979-03-08 Sulzer Ag Schlagvorrichtung fuer das schusseintragsorgan einer webmaschine
EP0418195A1 (fr) * 1989-09-15 1991-03-20 Sulzer RàœTi Ag Dispositif d'entraînement de la navette d'un métier à tisser
US5435354A (en) * 1992-12-10 1995-07-25 Sulzer Rueti Ag Accelerator lever for projectile looms
EP0908547A1 (fr) * 1997-10-07 1999-04-14 Sulzer Rüti Ag Dispositif d'insertion pour un fil de trâme dans un métier à tisser ainsi que métier à tisser equipé d'un tel dispositif

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB474741A (en) * 1935-03-06 1937-11-03 Tefag Textil Finanz Ag Improvements in or relating to high speed looms for weaving
DE1914481A1 (de) * 1969-03-21 1970-10-08 Lange & Co Gmbh Schleppschuetzen mit Faden-Klemmvorrichtung,die im Fluge den Faden uebernimmt und mittels eines Magneten angepresst wird
FR2161415A5 (en) * 1971-11-24 1973-07-06 Lebocey Industrie Weft picking element - for shuttle-less loom has stabilizing strip along one edge
US3831640A (en) * 1972-07-24 1974-08-27 Crompton & Knowles Corp Pneumatic loom
CS158355B1 (fr) * 1972-09-28 1974-11-25
JP2777400B2 (ja) * 1989-04-05 1998-07-16 唄野 乃華 磁気シャットル織機におけるひ投げ装置
EP0458735A1 (fr) * 1990-05-21 1991-11-27 Gebrüder Sulzer Aktiengesellschaft Tendeur de fil de trame pour métiers à tisser à projectiles à trames multiples
CH685712A5 (de) * 1992-08-25 1995-09-15 Sulzer Ag Vorrichtung zum Spannen eines eingetragenen Schussfadens und Webmaschine mit einer solchen Vorrichtung.
EP0890665B1 (fr) * 1997-07-09 2000-11-22 Sulzer Textil Ag Dispositif pour tendre un fil de trame et métier à tisser équipé d'un tel dispositif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE678468C (de) * 1937-01-31 1939-07-15 Tefag Textil Finanz A G Schuetzenschlagvorrichtung fuer Webstuehle
DE2742088A1 (de) * 1977-08-24 1979-03-08 Sulzer Ag Schlagvorrichtung fuer das schusseintragsorgan einer webmaschine
EP0418195A1 (fr) * 1989-09-15 1991-03-20 Sulzer RàœTi Ag Dispositif d'entraînement de la navette d'un métier à tisser
US5435354A (en) * 1992-12-10 1995-07-25 Sulzer Rueti Ag Accelerator lever for projectile looms
EP0908547A1 (fr) * 1997-10-07 1999-04-14 Sulzer Rüti Ag Dispositif d'insertion pour un fil de trâme dans un métier à tisser ainsi que métier à tisser equipé d'un tel dispositif

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103132213A (zh) * 2011-12-02 2013-06-05 江南大学 一种小样织机双气缸控制剑杆的快速引纬方法

Also Published As

Publication number Publication date
WO2007039242A2 (fr) 2007-04-12
WO2007039242A3 (fr) 2007-10-18

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