EP1696061B1 - Dispositif de rentrage de fils de trame - Google Patents

Dispositif de rentrage de fils de trame Download PDF

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Publication number
EP1696061B1
EP1696061B1 EP20060405034 EP06405034A EP1696061B1 EP 1696061 B1 EP1696061 B1 EP 1696061B1 EP 20060405034 EP20060405034 EP 20060405034 EP 06405034 A EP06405034 A EP 06405034A EP 1696061 B1 EP1696061 B1 EP 1696061B1
Authority
EP
European Patent Office
Prior art keywords
tuck
needle
tucking needle
shaft
drive
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.)
Not-in-force
Application number
EP20060405034
Other languages
German (de)
English (en)
Other versions
EP1696061A3 (fr
EP1696061A2 (fr
Inventor
Klaus Berktold
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
Itema Switzerland Ltd
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 Itema Switzerland Ltd filed Critical Itema Switzerland Ltd
Priority to EP20060405034 priority Critical patent/EP1696061B1/fr
Publication of EP1696061A2 publication Critical patent/EP1696061A2/fr
Publication of EP1696061A3 publication Critical patent/EP1696061A3/fr
Application granted granted Critical
Publication of EP1696061B1 publication Critical patent/EP1696061B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping

Definitions

  • the invention relates to a stripper for forming a selvedge in a loom according to the preamble of claim 1, and a loom with such a stripper.
  • the weft threads inserted in a shed are cut off at their ends with excess length in a weaving machine and the free ends are inserted into the opened shed after one of the next shed changes, but before the corresponding weft stop.
  • the insertion of the weft ends is usually done either mechanically, pneumatically or pneumo-mechanically.
  • An example of a purely mechanical insertion device with a bar needle is, for example, in the publication EP-A-0 454 238 disclosed.
  • An example of a pneumo-mechanical design is out EP-A-01334377 known. In this pneumo-mechanical design, a spiked needle with eyelet is used, in which the thread end is threaded by means of compressed air.
  • the disadvantage of both the mechanical and the pneumo-mechanical insertion devices is that their use, due to the mechanical drive of the Leistenlegernadel is limited to certain maximum speeds of the loom, and that the mechanical drive is expensive.
  • the loading device described in this document comprises a nozzle assembly with a plurality of nozzles arranged outside the fabric width in order to blow the weft thread ends into a shed.
  • US 5 158 119 discloses an insertion device, each comprising an electric linear motor with position sensor to drive the linear movement and the rotational movement of a Leistenlegernadel. If the position sensors detect a malfunction, the movement of the linear motors may be stopped to avoid collisions between the reed and the spine needle.
  • US 5 158 119 disclosed loading device has the disadvantage that it is not possible in all occurring in practice accidents, to avoid a collision between the reed and the bar needle. Thus, for example, in the event of a power failure, the reed will still carry out at least one stop movement due to the kinetic energy stored in the moving parts of the weaving machine, while the linear motors, which drive the spine needle to stop practically immediately and generally can not be stopped in a safe position.
  • the object of the invention is to provide a stripper for forming a selvedge in a loom available, which can be used at higher speeds of the loom, especially at 1000 shots per minute and above, and even with stiffer yarns produces a flawless selvedge.
  • a collision between the Leistenlegernadel and the other parts of the loom should be avoided in accidents, such as power outages.
  • Another object of the invention is to provide a weaving machine with such a last.
  • the stripper according to the invention for forming a selvedge in a weaving machine comprises a stripper needle for inserting one or more weft thread ends into a shed and an electric drive for moving the striping needle, wherein the strip bar needle additionally an emergency and / or emergency drive is provided to these in an accident to move into and hold in a safe position.
  • a secure position is understood in this context, a position in which collisions between the Leistenlegernadel and the other parts of the loom are avoided.
  • collisions of the bar needle with moving parts of the loom such as the reed or a gripper of a rapier or a projectile of a projectile weaving machine should be avoided.
  • Such collisions usually lead to Damage to the spine needle and in a collision with the reed also damage the Riets.
  • the stripper needle is pivotally and / or displaceably mounted.
  • a shaft connected to the bar needle can be mounted pivotably and / or displaceably.
  • the stripper comprises an operative connection between the electric drive and the bar needle or the shaft to move the bar needle forward and backward by means of the electric drive, and an additional forced guidance of the bar needle or the shaft, such that with the forward - Or rearward displacement additionally a pivoting movement of the bar needle is generated.
  • the stripper comprises an operative connection between the electric drive and the bar needle or the shaft, such that the bar needle is switched on and swung by means of the electric drive, as well as an additional forced guidance of the bar needle or the shaft, such that with the inward and outward pivoting additionally a forward or backward displacement of the bar needle is connected.
  • the electric drive may be constructed, for example, such that it comprises at least one electrical coil and at least one permanent magnet and a pivot axis about which the coil or the permanent magnet is pivotally mounted.
  • the coil is expediently arranged in the magnetic field of the permanent magnet, so that a current flowing through the coil generates an attractive or repulsive force and thus a pivoting movement between the coil and the permanent magnet.
  • the emergency and / or emergency drive comprises at least one mechanical or pneumatic drive, preferably an automatic mechanical or pneumatic drive, which may be designed, for example, as a spring, preferably as a mechanical or pneumatic spring.
  • the stripper additionally comprises a holding device in order to hold the striping needle in a fault in a secure position.
  • the holding device is important because normally no power is exerted by linear motors and simple electrodynamic drives in a de-energized state.
  • the emergency and / or emergency drive is simultaneously designed as a holding device, for example, by a spring is provided for the emergency or emergency drive and the holding device.
  • the invention comprises a weaving machine with a last according to one of the embodiments described above.
  • the stripper according to the invention has the advantage that it can be used at higher speeds of the weaving machine, in particular at 1000 shots per minute and above, and that it produces a perfect selvedge even with stiffer yarns.
  • the proposed in the inventive stripper emergency and / or emergency drive can be designed so that in case of failure, such as power outages, a collision between the Leistenlegernadel and the other parts of the loom is reliably avoided.
  • the significantly lower production costs compared to mechanically driven strippers are additionally advantageous.
  • Fig. 1 shows an oblique view of an embodiment of a last according to the present invention.
  • the stripper 10 comprises a striping needle 11 and a shaft 12 which is connected to the stripper needle 11 and which is mounted pivotably and displaceably in one or more guides 13.
  • the last 10 includes an electric drive 14 to move the shaft 12 and the last needle 11.
  • the electric drive 14 may, for example, as in Fig. 1 shown to be connected via an operative connection 17 with the shaft 12, to move the shaft 12 and the inguinal needle 11 forward and backward.
  • an emergency and / or emergency drive 15 is provided for the bar needle 11, to move them in a fault in a safe position.
  • the stripper is equipped with an additional positive guide 16 for the bar needle needle 11 and the shaft 12, which forced guidance from the forward and backward movement additionally generates a pivoting movement of the Leistenlegernadel.
  • the additional positive guide 16 the last 10 requires only a simple drive for the forward and backward movement.
  • the emergency and / or emergency drive 15 to move the bar needle in case of failure in a safe position is through the additional forced operation 16 greatly simplified.
  • the Leistenlegernadel 11 can be moved for example by means of a simple spring, such as a coil spring or a pneumatic spring in a secure position.
  • the additional positive guidance which couples the displacement with the rotational movement of the bar needle, can also be understood as a separate object.
  • the additional positive guide can for example be designed such that it comprises a guide cam connected to the shaft 12 and formed in a stationary part 16 guide groove in which the guide cam is guided, wherein at least a part of the guide groove extends obliquely to the axis of the shaft 12.
  • a pivoting movement is additionally generated or, in an alternative embodiment, a forward and backward movement during a pivoting movement of the shank.
  • the guide groove can also be formed in the shaft 12 and the guide cam in a stationary part.
  • the electric drive 14 is designed in the embodiment as an electrodynamic rotary actuator.
  • a detailed description of such a drive can be found for example in EP 1 016 743 A1 ,
  • the in Fig. 1 shown pivoting drive comprises two stationary permanent magnets 14.1, a coil support 14.2 with an electric coil and a pivot axis 14.3 about which the coil support 14.2 is pivotally mounted.
  • the coil is arranged in the magnetic field of the permanent magnet 14.1, so that a current flowing through the coil generates an attractive or repulsive force and thus a pivoting movement of the coil support 14.2.
  • the electrodynamic rotary actuator shown is relatively inexpensive to produce and has a short reaction time, since the moving masses of the bobbin and the coil can be kept small.
  • other suitable electric drives can also be used, for example a short linear motor or a linear electrodynamic drive.
  • the Leistenlegernadel 11 is in Embodiment hook-shaped and provided at the top with an eyelet 11a for receiving a weft thread end.
  • a Leistenlegernadel example in EP 0 134 377 A1 described.
  • the movement and the recording of the weft thread may need to be adjusted.
  • a weft thread 7 is first entered into a shed and struck with a reed 4. Subsequently, a change of subject, after which the warp threads 6.1, 6.2 form a new shed and the reed 4, as in the FIGS.
  • the end of the inserted weft thread is cut to a defined length and blown with the tuyere in the carrier 2 in the eyelet 11a of the Leistenlegernadel.
  • the Leistenlegernadel 11 is swung in the opposite direction, wherein the weft end is inserted into the top of the shed and the Leistenlegernadel leaves the shed.
  • the swiveling out of the bar needle 11 is coupled with a backward movement, so that the bar needle is seen at the end of the swiveling and backward movement of the reed 4 from behind the stop edge of the fabric 8.
  • a new weft thread is entered, which can now be struck together with the inserted weft thread end, without the reed touches the bar needle 11.
  • Fig. 3 shows a variant of a positive guide to the in Fig. 1 shown embodiment.
  • a groin needle 11 and a shaft 12 is connected, which is pivotally and slidably mounted, for example, in one or more guides 13 and / or a sleeve 16, the shaft partially or completely encloses.
  • the forced guidance of in Fig. 3 embodiment shown comprises a shaft 12 connected to the guide cam 16.1 and 16 formed in the sleeve guide groove 16.2, wherein at least a portion of the guide groove extends obliquely to the axis of the shaft 12.
  • the electric drive is designed as a linear drive 14. This allows a direct coupling of the drive with a shaft 12 of a stripper needle 11 and thus a particularly space-saving design of the stripper.
  • the strip board 10 additionally comprises a positive guide 16, 16.1, 16.2, for example a positive guide as described above in connection with FIG Fig. 3 described.
  • the linear drive 14 may be embodied, for example, as a short electric linear motor, a linear electrodynamic drive or as an electric servo motor with a traction spindle.
  • Fig. 5 shows a further embodiment of an electric drive with an electric linear drive 14 and an electric pivot drive 14 ', which together drive a shaft 12 of a Leistenlegernadel 11.
  • the emergency and / or emergency drive can be carried out in this embodiment, for example, such that an emergency power supply, such as an uninterruptible power supply, and an emergency control for the electric linear actuator 14 and the electric rotary actuator 14 'are provided to in case of failure, the Leistenlegernadel in a safe position to move.
  • an emergency power supply such as an uninterruptible power supply
  • the stripper according to the invention is suitable for producing high-quality selvedges, as are typical of mechanical strip liners.
  • the bar insert according to the invention can also be used at higher machine speeds of up to 1000 rounds per minute and above, thanks to the emergency operation or emergency operation in case of accidents Emergency drive collisions between the Leistenlegernadel and the remaining parts of the loom can be avoided.
  • it is advantageous to manufacture cost-effectively in comparison with mechanical prior art edgebands of the prior art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (8)

  1. Appareil à lisières pour la formation d'une lisière sur un métier à tisser, lequel appareil comprend une aiguille d'appareil à lisières pour l'insertion d'une ou de plusieurs extrémités de fil de trame dans un pas de chaîne et un entraînement électrique pour le déplacement de l'aiguille d'appareil à lisières, caractérisé en ce qu'une marche d'urgence et/ou un entraînement d'urgence est prévu pour l'aiguille d'appareil à lisières, afin de déplacer celle-ci dans une position sûre en cas d'incident.
  2. Appareil à lisières selon la revendication 1, l'aiguille d'appareil à lisières ou une tige reliée à cette aiguille étant fixée de façon pivotante et/ou coulissante.
  3. Appareil à lisières selon l'une quelconque des revendications 1 ou 2, comprenant une liaison active entre l'entraînement électrique et l'aiguille d'appareil à lisières ou la tige, afin de déplacer l'aiguille d'appareil à lisières en marche avant et en marche arrière au moyen de l'entraînement électrique, et un guidage forcé supplémentaire de l'aiguille d'appareil à lisières ou de la tige, de sorte que, avec le déplacement en marche avant ou en marche arrière, un mouvement de basculement de l'aiguille d'appareil à lisières peut être généré en supplément.
  4. Appareil à lisières selon l'une quelconque des revendications 1 ou 2, comprenant une liaison active entre l'entraînement électrique et l'aiguille d'appareil à lisières ou la tige, de telle sorte que l'aiguille d'appareil à lisières peut être basculée vers l'entrée et la sortie au moyen de l'entraînement électrique, et un guidage forcé supplémentaire de l'aiguille d'appareil à lisières ou de la tige, de telle sorte qu'un déplacement en marche avant ou en marche arrière de cette aiguille est associé au basculement vers l'entrée et la sortie.
  5. Appareil à lisières selon l'une quelconque des revendications 1 à 4, l'entraînement électrique comprenant au moins une bobine électrique et au moins un aimant permanent ainsi qu'un axe de pivotement, autour duquel la bobine ou l'aimant permanent est fixé de façon pivotante.
  6. Appareil à lisières selon l'une quelconque des revendications 1 à 5, la marche d'urgence et/ou l'entraînement d'urgence comprenant au moins un ressort, en particulier un ressort mécanique ou pneumatique.
  7. Appareil à lisières selon l'une quelconque des revendications 1 à 6, comprenant en supplément un dispositif de retenue, afin de maintenir l'aiguille d'appareil à lisières dans une position sûre en cas d'incident.
  8. Métier à tisser comprenant un appareil à lisières selon l'une quelconque des revendications 1 à 7.
EP20060405034 2005-02-23 2006-01-25 Dispositif de rentrage de fils de trame Not-in-force EP1696061B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060405034 EP1696061B1 (fr) 2005-02-23 2006-01-25 Dispositif de rentrage de fils de trame

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05405207 2005-02-23
EP20060405034 EP1696061B1 (fr) 2005-02-23 2006-01-25 Dispositif de rentrage de fils de trame

Publications (3)

Publication Number Publication Date
EP1696061A2 EP1696061A2 (fr) 2006-08-30
EP1696061A3 EP1696061A3 (fr) 2008-10-08
EP1696061B1 true EP1696061B1 (fr) 2010-06-23

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ID=36693561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060405034 Not-in-force EP1696061B1 (fr) 2005-02-23 2006-01-25 Dispositif de rentrage de fils de trame

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EP (1) EP1696061B1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134377B1 (fr) 1983-09-01 1986-11-26 Maschinenfabrik Sulzer-Rüti Ag Dispositif pour replier les bouts de fil de trame dans un métier à tisser
IT1239713B (it) * 1990-04-20 1993-11-15 Cem Italia Cimossatrice perfezionata per la formazione di una cimossa rientrata in un tessuto prodotto su telaio senza navetta
IT1242989B (it) * 1990-08-29 1994-05-23 Vamatex Spa Dispositivo perfezionato per la formazione della cimossa in telai senza navette
EP1016743B1 (fr) 1998-12-09 2003-04-16 Sultex AG Dispositif pour le déplacement commandé d'un fil de trame
JP3348056B2 (ja) 1999-10-01 2002-11-20 津田駒工業株式会社 無杼織機におけるタックイン装置

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Publication number Publication date
EP1696061A3 (fr) 2008-10-08
EP1696061A2 (fr) 2006-08-30

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