EP1867766A1 - Pince-fil pour une tête de préhension - Google Patents

Pince-fil pour une tête de préhension Download PDF

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Publication number
EP1867766A1
EP1867766A1 EP07108384A EP07108384A EP1867766A1 EP 1867766 A1 EP1867766 A1 EP 1867766A1 EP 07108384 A EP07108384 A EP 07108384A EP 07108384 A EP07108384 A EP 07108384A EP 1867766 A1 EP1867766 A1 EP 1867766A1
Authority
EP
European Patent Office
Prior art keywords
thread clamp
anchor
armature
core
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.)
Withdrawn
Application number
EP07108384A
Other languages
German (de)
English (en)
Inventor
Erich Kläui
Marius Bachofen
Dietmar Markward
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sultex AG filed Critical Sultex AG
Priority to EP07108384A priority Critical patent/EP1867766A1/fr
Publication of EP1867766A1 publication Critical patent/EP1867766A1/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Withdrawn legal-status Critical Current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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the invention relates to a thread clamp for a rapier head according to the preamble of claim 1 and a rapier head with such a thread clamp and a rapier with such a thread clamp or with such a gripper.
  • the weft thread is introduced into a shed by means of a gripper gripper fastened to a gripper bar or a flexible belt and taken over by a gripper gripper at a transfer point in the middle part of the shed and forwarded.
  • the bringer rapier has the task to capture the presented weft thread, enter it into the shed and deliver it precisely to the gripper.
  • Each gripper includes a gripper head with a thread clamp to clamp the weft during weft insertion.
  • thread clamps In automatically clamped thread clamps thread takeover takes place by pulling in or out of the weft thread from preset clamping areas of the respective thread clamps.
  • controlled thread clamps can be used in one or both gripper heads, which is actively opened in the thread takeover the thread clamp of the rapier or that of the gripper rapier is actively closed.
  • the controlled thread clamps can be mechanically and / or electrically controlled.
  • An electrically controlled thread clamp with an electric actuator is for example in the publication WO 99/60193 described.
  • thread clamp described comprises a movable clamping member which is kept closed by means of a prestressed spring.
  • To open the clamping part is an electromagnet in the actuator.
  • the disadvantage of this arrangement is that the electromagnet must be supplied with power to keep the thread clamp open, which can lead to undesirable heating of the electromagnet and the other current-carrying parts.
  • the electrical power consumption of this thread clamp is therefore comparatively high, even if the opening times of the thread clamp with respect to the entire weft insertion cycle are short.
  • the object of the invention is to provide a thread clamp for a rapier head of a rapier and a rapier head with such a thread clamp and a rapier with such a thread clamp or with such a rapier head available, which require less electrical energy compared to the prior art described above to keep the thread clamp open or closed.
  • the inventive thread clamp for a rapier head includes a clamping part for clamping a weft thread and an actuator for moving the clamping part.
  • the actuator comprises a ferromagnetic core, an armature and at least one winding disposed on the core or armature for generating a magnetic field therein and for moving the armature and the clamping member operatively connected thereto.
  • the armature of the inventive thread clamp is arranged movable between two rest positions, wherein at least one holding means is provided to hold the armature in the currentless state of the winding both in one and in the other rest position.
  • core and armature form a magnetic circuit.
  • the core can be U-shaped be formed so that it has two legs.
  • the core can be 1-shaped and the armature can be U-shaped, or core and armature can be formed, for example, both U-shaped or L-shaped.
  • the armature is designed as a tilting armature.
  • At least one permanent magnet e.g. a bar magnet, provided, which may be arranged for example on the core or anchor.
  • the core has two legs, between which the armature is movably arranged, wherein two permanent magnets are provided to hold the armature in the currentless state of the winding in each case on one of the two legs.
  • each leg is provided with a permanent magnet, wherein the permanent magnets can each be arranged on the inside of the legs and / or in an end region thereof.
  • a holding means e.g. also be provided a spring element.
  • the spring element can be tensioned when the armature leaves one of the two rest positions, so that the spring force holds the armature in the respective rest position.
  • the core and / or the armature are constructed of transformer sheet metal.
  • the clamping part is formed on the armature.
  • the winding is connected to an energy store, for example an accumulator or capacitor.
  • the winding is connected via a control circuit to the energy store.
  • the thread clamp is additionally mechanically and / or pneumatically actuated.
  • the thread clamp for example, outside the shed mechanically and / or pneumatically opened and closed, which reduces the electrical energy consumption and associated with the same warming.
  • the invention comprises a gripper head with a thread clamp according to one of the embodiments described above, wherein the gripper head can be configured as Bringergreifer or gripper, and a rapier with a thread clamp according to one of the embodiments described above and / or with a gripper head according to the above description.
  • the thread clamp according to the invention and the gripper head according to the invention and the gripper loom according to the invention have the advantage that the actuator of the thread clamp requires no current both in the closed and in the open state of the thread clamp, since the armature respectively in a rest position corresponding to the closed or opened state of the thread clamp in which it is held by the retaining means. Only for opening and closing the thread clamp power is needed. Thus, the total energy consumption of the thread clamp is lowered and the actuator can be compared to actuators conventional thread clamps, made smaller and lighter, without causing undesirable heating of the electromagnet and the other live parts. In addition, at certain stages of the weaving cycle, e.g. if the gripper head is outside the shed, it is possible to mechanically or pneumatically actuate the actuator, which further lowers the heating of the actuator.
  • Fig. 1 shows a schematic representation of a rapier head (1) and a belt drive with an embodiment of a thread clamp according to the present invention in an oblique view.
  • the rapier head 1 is connected to a longitudinally displaceable belt 2, which can be moved by a belt drive 6 forward and backward.
  • the belt drive 6 comprises, for example, as shown in Fig. 1, a drive wheel which is provided at its periphery with teeth which engage in recesses of the belt 2.
  • the tape guides for guiding the tape 2 in the longitudinal direction have been omitted in Fig. 1 for the sake of clarity. If the band is made flexible, it can, as shown in Fig. 1, are guided around the drive wheel.
  • the thread clamp which can be arranged in the rapier head 1 as shown in FIG. 1, contains in the exemplary embodiment a clamping part 4 for clamping a weft thread 3 and an actuator 5 for moving the clamping part 4.
  • this can be directly connected to the secondary Induction coil 9 be connected or via a converter / control circuit, which may for example contain a demodulator and / or amplifier.
  • the clamping part 4 can be pressed against a support or the pressed-clamping part can be opened.
  • the actuator 5 comprises a ferromagnetic core 12, an armature 11 and at least one winding 13 which is arranged on the core or armature in order to generate a magnetic field therein and to move the armature and the clamping part operatively connected thereto.
  • the armature 11 is is arranged movable between two rest positions, wherein at least one holding means 14.1, 14.2 is provided to hold the armature in the currentless state of the winding both in one and in the other rest position.
  • the core 12 has in the embodiment shown in FIG.
  • the core 12 may, as shown in Fig. 3, for example, be U-shaped.
  • the core 12 and / or the armature 11 are constructed from transformer sheet.
  • the clamping part 4 is formed on the armature 11 or the armature itself acts as a clamping part.
  • the permanent magnets 14.1, 14.2 are each arranged on the inside of the legs 12.1, 12.2 and in an end region thereof.
  • the armature 11 is designed as a tilting armature which can be tilted about an axis 15. In this embodiment, the part of the armature spaced from the axis 15 can be moved between the two legs 12.1, 12.2 in a direction 16 which runs essentially transversely to the longitudinal axis of the armature.
  • the part of the armature spaced from the axis 15 is attracted to the nearest leg 12.1, 12.2 by the field generated by the permanent magnets until it reaches a stop, for example the inside of a leg or a surface of the permanent magnets, on the he is held by the field.
  • a positive or negative current pulse which is passed through the winding 13 the armature can be moved from one leg to the other or from one rest position to the other.
  • the winding 13 is connected to an energy store, for example an accumulator or capacitor, wherein the winding can be connected to the energy store, for example via a control circuit.
  • an energy store for example an accumulator or capacitor
  • the electrical energy consumption of the thread clamp can be further reduced by additionally providing, for example, a mechanical and / or pneumatic actuation of the thread clamp.
  • the thread clamp can be opened and closed mechanically and / or pneumatically, for example, within the shed electrically and outside the shed.
  • the power supply 10 includes, for example, an inductive coupling device with at least one primary induction coil 8, which is arranged in an advantageous embodiment stationary and at least one secondary induction coil 9, which is inductively coupled to the primary induction coil.
  • the primary induction coil 8 is advantageously powered by a generator operating, for example, at a frequency of 5 kHz to 100 kHz.
  • the inductive coupling device can, as shown in Fig. 1, additionally comprise a magnetizable core 7, which consists for example of transformer sheet or ferrite, and which comprises e.g. has a slot through which the band 2 is guided.
  • the secondary induction coil 9 is formed on the band 2, for example by embedding one or more elongated conductor loops in the band or applied to the band, for example by laminating a Cu foil.
  • the secondary induction coil 9 extends over a length of at least 5 cm, at least 15 cm or at least 50 cm.
  • the secondary induction coil 9 is formed so long that during the forward and backward movement of the belt 2, it does not leave the field of the primary induction coil 8, ie that the gripper head is supplied without intermediate storage during the entire weft insertion and / or weaving machine cycle can be.
  • the information can be, for example, on the Power supplied current flow to be modulated or transmitted by means of their own control pulses.
  • the energy store is expediently connected to the secondary induction coil 9 via a converter.
  • the secondary induction coil can be made shorter in this case, in particular shorter than the path traveled by the gripper head, since interruptions of the power supply via the inductive coupling device can be bridged by the energy storage. While the power supply via the inductive coupling device is interrupted or also generally, control information can e.g. be transmitted optically or high frequency to the gripper head, wherein the secondary induction coil can be used in the latter case as an antenna.
  • the thread clamp in the gripper head via a sensor such. a proximity sensor can be controlled, which is arranged in the gripper head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP07108384A 2006-06-16 2007-05-16 Pince-fil pour une tête de préhension Withdrawn EP1867766A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07108384A EP1867766A1 (fr) 2006-06-16 2007-05-16 Pince-fil pour une tête de préhension

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06115598 2006-06-16
EP07108384A EP1867766A1 (fr) 2006-06-16 2007-05-16 Pince-fil pour une tête de préhension

Publications (1)

Publication Number Publication Date
EP1867766A1 true EP1867766A1 (fr) 2007-12-19

Family

ID=38687336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07108384A Withdrawn EP1867766A1 (fr) 2006-06-16 2007-05-16 Pince-fil pour une tête de préhension

Country Status (1)

Country Link
EP (1) EP1867766A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010142446A1 (fr) * 2009-06-10 2010-12-16 Picanol N.V. Unité préhensile, système de commande pour unité préhensile, et métier à tisser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060193A1 (fr) * 1998-05-18 1999-11-25 Textilma Ag Pince et dispositif de duite destine a une machine a tisser a pince
WO2004035891A2 (fr) * 2002-10-10 2004-04-29 Lindauer Dornier Gesellschaft Mbh Procede pour commander des elements d'un organe de travail dans des metiers a tisser et metier a tisser pour realiser ce procede

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060193A1 (fr) * 1998-05-18 1999-11-25 Textilma Ag Pince et dispositif de duite destine a une machine a tisser a pince
WO2004035891A2 (fr) * 2002-10-10 2004-04-29 Lindauer Dornier Gesellschaft Mbh Procede pour commander des elements d'un organe de travail dans des metiers a tisser et metier a tisser pour realiser ce procede

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010142446A1 (fr) * 2009-06-10 2010-12-16 Picanol N.V. Unité préhensile, système de commande pour unité préhensile, et métier à tisser
BE1018774A3 (nl) * 2009-06-10 2011-08-02 Picanol Nv Grijpereenheid, controlesysteem voor een grijpereenheid en weefmachine.
CN102803591A (zh) * 2009-06-10 2012-11-28 必佳乐公司 夹持单元，用于夹持单元的控制系统和织机
EP2440696B1 (fr) 2009-06-10 2016-01-06 Picanol Unité préhensile, système de commande pour unité préhensile, et métier à tisser

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