EP1860216A1 - Stromversorgung für einen Greiferkopf - Google Patents

Stromversorgung für einen Greiferkopf Download PDF

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Publication number
EP1860216A1
EP1860216A1 EP07107151A EP07107151A EP1860216A1 EP 1860216 A1 EP1860216 A1 EP 1860216A1 EP 07107151 A EP07107151 A EP 07107151A EP 07107151 A EP07107151 A EP 07107151A EP 1860216 A1 EP1860216 A1 EP 1860216A1
Authority
EP
European Patent Office
Prior art keywords
induction coil
gripper
power supply
secondary induction
rapier
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Withdrawn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
EP07107151A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dietmar Markward
Marius Bachofen
Erich Kläui
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 EP07107151A priority Critical patent/EP1860216A1/de
Publication of EP1860216A1 publication Critical patent/EP1860216A1/de
Withdrawn legal-status Critical Current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
    • 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
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands

Definitions

  • the invention relates to a power supply for a rapier head of a rapier weaving according to the preamble of claim 1 and a method for powering a rapier head in a rapier according to the preamble of claim 8 and a loom with such a power supply and for carrying out such a method.
  • rapier weaving the weft thread is registered by means of a fixed to a rod or a flexible belt rapier in a shed and taken over at a transfer point in the middle part of the shed by a gripper rapier 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 takeover takes place by Hineinziehzieh or pulling 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 a electric actuator is for example in the publication WO 99/60193 described.
  • the power supply of the controlled thread clamp via an arranged in the gripper head induction coil, which is inductively coupled to a second induction coil, which is mounted above the shed.
  • the energy transfer between the two in WO 99/60193 described induction coil is not very efficient, since both induction coils are designed as air coils and the distance between the coils is relatively large.
  • the transmission power is limited as a result of the radiated from the induction coils noise, since these legally prescribed limits must be met.
  • the object of the invention is to provide a power supply for a rapier head of a rapier and a method for powering a rapier head in a rapier available, which allow a higher compared to the above-described prior art transmission power, and by means of which an arrangement of an induction coil above - Can be avoided or below the shed.
  • the inventive power supply for a rapier head of a rapier weaving machine which is connected to a longitudinally displaceable gripper bar or a longitudinally displaceable band comprises an inductive coupling device with at least one primary induction coil and at least one secondary induction coil, which can be inductively coupled to the primary induction coil ,
  • the power supply is characterized in that the secondary induction coil is formed on the gripper bar or on the belt and / or on an elongate fastening part of the gripper head.
  • the primary induction coil is arranged stationary.
  • the secondary induction coil is elongate, so that the same, for example over a length of at least 5 cm, 15 cm or at least 50 cm.
  • the secondary induction coil comprises one or more current loops or turns which can form a single or a plurality of successive magnetic poles.
  • the secondary induction coil is connected via a converter to an energy store, for example a capacitor or an accumulator.
  • the inductive coupling device comprises at least one magnetizable core and / or a magnetizable yoke.
  • the primary induction coil may e.g. be arranged on a magnetizable core having an air gap into which the secondary induction coil can be inserted.
  • the invention comprises a method for powering a rapier head in a rapier weaving machine, which is connected to a gripper bar or a belt.
  • at least one primary induction coil of an inductive coupling device is coupled to at least one secondary induction coil thereof and energy is transferred from the primary induction coil to the secondary induction coil, the secondary induction coil extending over a portion of the gripper bar or belt and / or an elongated mounting portion of the induction coil Gripper head extends.
  • a field is generated by the primary induction coil, for example using a magnetizable core, the magnetic circuit being e.g. may extend to one or more air gaps in the magnetizable core, and guided the secondary induction coil together with the gripper bar or the band or the fastening part by the field generated by the primary induction coil.
  • the invention comprises a rapier weaving machine with a power supply according to one of the embodiments described above and / or equipped for carrying out a method according to the above description.
  • the inventive power supply and the inventive method for powering a rapier head in a rapier loom have the advantage that the clamping device in the gripper head thanks to the arrangement of the secondary induction coil on the gripper bar or on the belt and / or the fastening part depending on the length of the secondary induction coil during a part or can be supplied with power and / or control information throughout the weft insertion.
  • the expansion of the field of the inductive coupling device by means of a magnetizable core can be greatly restricted, whereby the transmission performance of the coupling device can be increased.
  • Another advantage is the fact that the primary induction coil can be mounted outside and to the side of the shed.
  • the energy transferred by the inductive coupling device is stored in the gripper head, it is sufficient to limit the length of the secondary induction coil to a part of the length of the gripper bar or of the belt and / or the fastening part.
  • Fig. 1 shows a schematic representation of a gripper head 1 and a tape drive with an embodiment of a power supply 10 for the gripper head according to the present invention.
  • 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 power supply 10 for the gripper head comprises in the exemplary embodiment 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 as shown in Fig. 1, additionally comprise a magnetizable core 7, for example, from Transformer sheet or ferrite, and for example, 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, 15 cm or at least 50 cm.
  • the secondary induction coil 9 is formed so long that it does not leave the field of the primary induction coil 8 during the forward and backward movement of the strip 2, i. that the gripper head during the entire weft insertion and / or weaving machine cycle can be supplied without intermediate storage with electricity.
  • it is also possible to transmit information about the gripper head via the inductive coupling device during the entire weft insertion and / or weaving machine cycle for example information for controlling a thread clamp arranged in the gripper head.
  • the information can for example be modulated onto the power flow serving the power supply or transmitted by means of its own control pulses.
  • the gripper head 1 advantageously comprises a controlled thread clamp with a clamping part 4 for holding a weft thread 3 and an actuator 5, which is electrically connected to the secondary induction coil 9 and by means of which the clamping part 4 pressed against a support or a pressed-clamping part can be solved.
  • the connection of the actuator 5 with the secondary induction coil 9 can be done directly or via a converter, which may for example contain a demodulator and / or amplifier.
  • the secondary induction coil 9 is connected via a converter with an energy storage, not shown, for example, an accumulator or a capacitor, which supplies the actuator intermittently or continuously with power.
  • 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, information can be transmitted eg optically or high frequency to the gripper head, wherein the secondary induction coil can be used as an antenna in the latter case.
  • the thread clamp in the gripper head can also be controlled via a sensor such as a proximity sensor, which is arranged in the gripper head.
  • Fig. 2 shows a second embodiment of a power supply for a rapier head 1 according to the present invention seen from above, which is constructed analogously to the embodiment of FIG.
  • the rapier head 1 is connected to a longitudinally displaceable belt 2, which can be moved forward and backward by a belt drive, not shown.
  • the power supply 10 for the gripper head comprises in the second embodiment, an inductive coupling device with at least one primary induction coil 8 and at least one secondary induction coil 9, which is inductively coupled to the primary induction coil.
  • the inductive coupling device as shown in Fig. 2, may additionally comprise a magnetizable core 7, 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 an elongated conductor loop embedded in the band or applied to the band. If required, a plurality of conductor loops or windings and / or a plurality of secondary induction coils may be formed on the band 2.
  • the secondary induction coil 9 extends over a length of at least 5 cm, 15 cm or at least 50 cm. In a particularly advantageous embodiment, the secondary induction coil 9 is formed so long that it does not leave the field of the primary induction coil 8 during the forward and backward movement of the belt 2, ie that the energy and / or information transmission via the inductive coupling device throughout Weft insertion and / or weaving machine cycle is possible.
  • Fig. 3 shows a third embodiment of a power supply for a rapier head 1 according to the present invention.
  • the embodiment shown in Fig. 3 differs from that shown in Fig. 2 by an elongate fastening part 2 'by means of which the rapier head is attached to the belt 2.
  • the fastening part 2 ' has a profile, which may for example be formed flat and may extend over a length which is greater than the length of the gripper head if necessary. In this way, a reliable attachment of the gripper head on the belt 2 can be achieved even if this is flexible and comparatively thin.
  • the fastening part is arranged over at least part of its length on the belt.
  • the power supply 10 for the gripper head comprises in the third embodiment, an inductive coupling device with at least one primary induction coil 8 and at least one secondary induction coil 9, which is inductively coupled to the primary induction coil.
  • the inductive coupling device may additionally comprise a magnetizable core 7, e.g. a slot or an opening through which the band 2 and / or the fastening part 2 'is guided.
  • the secondary induction coil 9 is formed in the third embodiment on the fastening part 2 ', for example, by one or more elongated conductor loops on the fastening part 2' are applied.
  • the fastening part 2 ' contains a magnetizable material along which the conductor loop or loops are arranged.
  • Fig. 4 shows a fourth embodiment of a power supply for a rapier head 1 according to the present invention with a longitudinal direction displaceable gripper bar 2, with which the gripper head is connected.
  • the power supply 10 for the gripper head comprises in the fourth embodiment, an inductive coupling device with at least one primary induction coil 8 and at least one secondary induction coil 9, which is inductively coupled to the primary induction coil.
  • the inductive coupling device can, as shown in Fig. 4, additionally comprise a magnetizable core 7, for example, has a slot or the profile of the rapier bar adapted opening through which the gripper bar 2 is guided.
  • the secondary induction coil 9 is formed on the rapier bar 2, for example, by embedding one or more elongate conductor loops in the rapier bar or applying it to the rapier bar.
  • the gripper bar 2 contains a magnetizable material, such as a pipe or profile or sheet of eg magnetizable steel, along which the conductor loop or loops are arranged.
  • At least one primary induction coil 8 of an inductive coupling device is coupled to at least one secondary induction coil 9 thereof and energy is transferred from the primary induction coil to the secondary induction coil, with the secondary induction coil 9 extending over a portion of the gripper bar or belt 2 and / or an elongated fastening part 2 'of the rapier head 1 extends.
  • a field is generated by the primary induction coil 8, advantageously using a magnetizable core 7, and the secondary induction coil 9 together with the gripper bar or the band 2 or the fastening part 2 'guided by the field generated by the primary induction coil.
  • the primary induction coil 8 for example, by means of a generator which operates, for example, with a frequency of 5 kHz to 100 kHz, are supplied with power.
  • the primary induction coil outside and laterally of the shed can be attached.
  • the spatial distance between the primary and secondary induction coil can be kept small and the transmission power can be increased.
  • An additional increase in the transmission power results when a magnetizable core is used in the inductive coupling device.
  • the length of the secondary induction coil can be selected within a wide range, whereby the energy transmission via the inductive coupling device can be ensured as required during a part or during the entire weft insertion.
EP07107151A 2006-05-26 2007-04-27 Stromversorgung für einen Greiferkopf Withdrawn EP1860216A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07107151A EP1860216A1 (de) 2006-05-26 2007-04-27 Stromversorgung für einen Greiferkopf

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06405232 2006-05-26
EP07107151A EP1860216A1 (de) 2006-05-26 2007-04-27 Stromversorgung für einen Greiferkopf

Publications (1)

Publication Number Publication Date
EP1860216A1 true EP1860216A1 (de) 2007-11-28

Family

ID=38621844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07107151A Withdrawn EP1860216A1 (de) 2006-05-26 2007-04-27 Stromversorgung für einen Greiferkopf

Country Status (1)

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EP (1) EP1860216A1 (no)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060193A1 (de) * 1998-05-18 1999-11-25 Textilma Ag Greifer und eine schusseintragvorrichtung für eine greiferwebmaschine
WO2004035891A2 (de) * 2002-10-10 2004-04-29 Lindauer Dornier Gesellschaft Mbh Verfahren zum steuern von komponenten eines arbeitsmittels in webmaschinen und webmaschine zur verfahrensdurchführung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060193A1 (de) * 1998-05-18 1999-11-25 Textilma Ag Greifer und eine schusseintragvorrichtung für eine greiferwebmaschine
WO2004035891A2 (de) * 2002-10-10 2004-04-29 Lindauer Dornier Gesellschaft Mbh Verfahren zum steuern von komponenten eines arbeitsmittels in webmaschinen und webmaschine zur verfahrensdurchführung

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