WO2000063474A1 - Dispositif permettant d'inserer des fils de trame dans un metier a tisser a tuyeres - Google Patents

Dispositif permettant d'inserer des fils de trame dans un metier a tisser a tuyeres Download PDF

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Publication number
WO2000063474A1
WO2000063474A1 PCT/EP2000/003368 EP0003368W WO0063474A1 WO 2000063474 A1 WO2000063474 A1 WO 2000063474A1 EP 0003368 W EP0003368 W EP 0003368W WO 0063474 A1 WO0063474 A1 WO 0063474A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzles
sley
drive unit
holder
guide channel
Prior art date
Application number
PCT/EP2000/003368
Other languages
German (de)
English (en)
Inventor
Joseph Verhulst
Jozef Peeters
Original Assignee
Picanol N.V.
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 Picanol N.V. filed Critical Picanol N.V.
Publication of WO2000063474A1 publication Critical patent/WO2000063474A1/fr

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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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/3046—Weft yarn selection

Definitions

  • the invention relates to a device for introducing weft threads for a jet weaving machine with a plurality of nozzles that can be attached to a sley, movable relative to the sley, and with a drive unit connected to the nozzles by means of coupling elements for adjusting the holder, in order to move at least one nozzle to one that moves with the sley Align the guide channel.
  • the weft threads are transported in a guide channel mounted on the sley from the entry side to the opposite side.
  • different weft threads are inserted one after the other, for example weft threads that differ in color.
  • several nozzles are provided, each of which is intended for the insertion of one weft thread. These nozzles are held together and movably mounted on the sley in order to align the outlet of the nozzle used with the guide channel, ie to arrange it in an extension of the guide channel. While the weft thread is being inserted, the nozzle in question remains aligned with the guide channel until the inserted weft thread is inserted into a weft thread.
  • the invention has for its object to provide a device of the type mentioned which increases the mass moving with the sley as little as possible and which manages with the lowest possible accelerations when aligning the nozzles to the guide channel.
  • the drive unit can be attached in a stationary manner and that it is assigned a control unit which adjusts the drive movement to the movement of the sley and effects an alignment of the nozzles to the guide channel.
  • the control unit causes the stationary drive unit to drive the nozzles with a defined course of movement, in which a nozzle is positioned in the extension of the guide channel and is held in this position during the movement of the sley to strike a weft thread.
  • the drive unit continuously carries out an operating movement with a predetermined movement course, so that no abrupt movements and therefore no strong accelerations occur in order to position and hold a nozzle in the extension of the guide channel. Positioning and holding the position are achieved in a flowing drive movement that is not stopped by components running against a stop. It is only necessary to change the course of movement of the drive unit in order to position another nozzle in the extension of the guide channel, without having to start a movement at all.
  • the movement profiles of the drive unit for the nozzles, which are assigned to the individual nozzles, are entered in the control unit as programs which can be run off. In this way, the movements can be repeated very precisely, especially depending on the rotation of the main shaft of the loom.
  • the nozzles are assigned a sensor which detects the relative position to the guide channel and which is connected to the control unit. This sensor allows control, adjustment and compensation of tolerances.
  • a teaching of the control unit is possible via the sensor, in which the movements of the nozzles are entered into the control unit.
  • the nozzles are held in a common holder which can be attached to the sley in a manner pivotable about an axis running transversely to the shaft of the sley. It is advantageous if it is provided in a further embodiment of the invention that the center of gravity of the holder and the elements held by it lies at least approximately in the axis of the holder. The forces required to adjust the holder are therefore relatively low. It is preferably provided that the drive unit contains a switchable reluctance motor, which is preferably connected to the nozzles via a crank mechanism and coupling elements. Such a drive motor is particularly suitable for executing a changeable, continuous movement.
  • the drive unit can be attached above the nozzles.
  • the drive shaft of the crank drive of the drive unit can be attached approximately in the bisector of a swivel angle about which the nozzles can be pivoted by means of the sley. This ensures that on the one hand the drive unit can maintain a sufficient distance from the sley, while on the other hand only relatively small adjustment paths of the drive unit are required to hold a nozzle in the position in the extension of the guide channel. The amount of movement necessary to position another nozzle in the extension of the guide channel is also limited.
  • FIG. 1 shows a schematic representation of a section of an air jet loom with a device according to the invention
  • FIG. 2 shows a partial section through the air jet loom with a device according to the invention and a reed shown in dashed lines,
  • FIG. 3 is a perspective view on an enlarged scale of coupling elements of the device according to the invention
  • 4 shows a partial section similar to FIG. 2 with a different position of the nozzles
  • FIG. 5 is a view similar to FIGS. 2 and 4 of the nozzles in the position of FIG. 4 in the stop position of a sley,
  • FIG. 6 is a partial section similar to FIG. 4 with a different position of the nozzles
  • FIG. 7 shows a section similar to FIG. 4 with yet another position of the nozzles
  • FIG. 8 shows a diagram with the movement profiles of the drive unit of a device according to the invention for a total of four different positions of nozzles and
  • FIG. 9 and 10 diagrams similar to FIG. 8 with the movement profiles for positioning nozzles in the extension of a guide channel.
  • a weaving machine 2 is shown from a weaving machine, which contains a shaft 3 and a shop profile 4, which is connected to the shaft 3 by means of stilts 5.
  • a total of eight nozzles 9 are mounted on the shutter profile 4 of the sley 2, by means of which a weft thread can be inserted in each case. These nozzles 9 are held pivotably about an axis 11 by means of a common holder 10 in a bearing block fastened to the shop profile 4. The axis 11 extends transversely to the shaft 3 of the sley 2.
  • the nozzles 9 of the illustrated embodiment have a holding element 24 in pairs, by means of which they are fastened to the holder 10.
  • the nozzles 9 are also in pairs in the area of their mouths 18 by means of a support 25 held side by side on the holder 10.
  • the orifices 18 of the nozzles 9 are located in the area of the beginning 12 of the guide channel 8.
  • the device 1 also contains an adjusting device 13 in order to position a nozzle 9 with its mouth 18 in the extension of the beginning 12 of the guide channel 8.
  • This adjusting device 13 contains a stationary mounted drive unit 14 and coupling elements 15 which connect the drive unit 14 to the nozzles 9 arranged on the drawer profile 4, i.e. with its holder 10.
  • the drive unit 14, which is attached above the nozzles 9 to a profile 17 of the frame of the weaving machine, contains a controllable and / or adjustable drive motor, in particular a switchable reluctance motor.
  • the drive unit 14 is connected to the holder 10 by means of coupling elements 15.
  • These coupling elements 15 contain a leaf spring 16, which connects a crank drive 32 or eccentric drive driven by the drive shaft 19 of the drive unit 14 with a bearing block 26 of the holder 10.
  • the center of gravity of the holder 10 with the elements attached to it lies approximately in the axis 11, so that the drive means 13 have to absorb almost no inertial forces caused by the movement of the sley 2.
  • the drive shaft 19 of the drive unit 14 runs parallel to the axis 20 of the shaft 3 of the sley 2.
  • the crank axis of the crank mechanism 32 which is determined by a screw 34 (FIG. 3), is close to the bisector 21 of the angle, which is the movement of the limited with the sley 2 moving nozzles 9. This angle is indicated by lines 22, 23 in FIG. 2.
  • the crank axis as can be seen from FIG. 2, is preferably offset somewhat from the line 22, which corresponds to the stop position of the sley 2, with respect to the bisector 21. Due to this arrangement, the movement of the drive shaft 19 of the drive unit 14 is relative small to move the nozzles 9 in the manner to be explained.
  • the end of the leaf spring 16 facing the holder 10 is mounted in a bearing block 26 which is fastened to the holder 10 in the region of the mouths 18 of the nozzles 9.
  • This end of the leaf spring 16 is provided with a clamping piece 30 which is mounted in the bearing block 26 by means of an axis 28.
  • the axle 28 is fixed by means of "bolts 29 in the bearing block 26th
  • the bearing block 26 is provided with bores 31 in order to fasten it to the holder 10 by means of screws.
  • the other end of the leaf spring 16 is also provided with a clamping piece 35 which is mounted on the screw 34 of the crank mechanism 32 forming the crank axis.
  • the crank part of the crank mechanism 32 is clamped onto the drive shaft 19 by means of a clamping screw 33.
  • the drive unit 14 is slidably attached to the profile 17 parallel to the axis of rotation 20 of the sley 3.
  • the holder 10 i.e. the bearing bracket receiving it, slidably attached to the shutter profile 4 in the direction of the axis of rotation 20 of the sley 2, so that the drive unit 14 and the nozzles 9 can be aligned with one another in the direction of the axis of rotation 20 such that the leaf spring 16 essentially in a vertical plane is arranged.
  • the broad sides of the leaf spring 16 point in the direction of the axis 20 of the shaft 3 of the sley 2.
  • This arrangement is advantageous if the drive unit 14 and the nozzles 9 are adjusted in order to carry fabrics on the weaving machine weave different widths. 2 also shows the upper and lower warp thread levels 36, which form a shed 37, as well as a fabric support 39 for the fabric 38 and a spreader 40.
  • the course of movement of the drive unit 14 is controlled on the one hand by means of a control unit 54 in such a way that one of the nozzles, ie a pair of nozzles 9a, 9b, 9c or 9d (FIGS. 4 to 7) is selected and positioned in front of the guide channel 8, and that this selected nozzle 9a, 9b, 9c or 9d remains in this position during the stop movement of the sley 2.
  • a control unit 54 in such a way that one of the nozzles, ie a pair of nozzles 9a, 9b, 9c or 9d (FIGS. 4 to 7) is selected and positioned in front of the guide channel 8, and that this selected nozzle 9a, 9b, 9c or 9d remains in this position during the stop movement of the sley 2.
  • curves 42, 43, 44, 45 show the movement profiles of the drive unit 14, ie the angular position R (FIG. 5) of the crank mechanism 32, by means of which the nozzles 9d, 9c, 9b, 9a in the Position in extension of the guide channel 8 are held while the sley 2 is pivoted back and forth.
  • the angular positions R of the crank mechanism 32 are shown in curves 42 to 45 for a weft insertion, ie for a rotation of 360 ° of the main shaft of the weaving machine.
  • the angular position R of the drive unit 14 and the angular position W of the sley are detected by sensors, not shown, which are connected to the control unit 54.
  • the nozzles 9b are positioned in the extension of the guide channel 8.
  • the drive unit 14 has to execute a course of movement according to curve 44 in order to to keep the nozzles 9b in the position in extension of the guide channel 8.
  • the control unit 54 controls the drive unit 14 in such a way that it assumes the assigned angular position R corresponding to the curve 44 at every angular position W of the sley 2.
  • the insertion of a weft thread is started when the sley 2 is in the position shown by line 46, which corresponds almost to the rearmost position.
  • nozzles 9b (as well as the nozzles 9a, 9c, 9d in other settings) remain positioned essentially in the extension of the guide channel 8 during the insertion of the weft thread.
  • the nozzles 9b are preferably held in this position until the inserted weft thread has struck the fabric 38 and has been cut off from the weft thread held ready.
  • the weft thread is cut off and struck, for example, when the sley 2 is in the position indicated by line 47.
  • the cutting of the weft thread does not have to coincide with the striking. It can also be done shortly after striking.
  • the curve 45 shows the course of movement in order to hold the nozzles 9 a (see FIG. 7) in position in front of the guide channel 8.
  • curve 43 belongs to the nozzle position of nozzles 9c according to FIG. 2, while curve 42 belongs to nozzles 9d according to the position according to FIG. 6.
  • a weft insertion by means of another nozzle can be changed as desired. This is done in that the nozzle now selected for the weft insertion is then positioned in front of the guide channel 8 instead of the previous nozzle.
  • This change of position takes place, as shown in FIGS. 9 and 10, while the sley moves from the stop position 0 ° to the rearmost position up to the line 46.
  • lines 48, 50, 51 a change between the nozzle 9d and the nozzles 9a, 9b and 9c can take place in accordance with these curves.
  • other position changes can also be carried out, which are not shown here for reasons of clarity.
  • the possible curves 48 to 53 (as well as further ones not shown) for the transition phases and the curves 42 to 45 are stored in the control unit 54 as callable programs in order to be available for a desired pattern for introducing weft threads. These curves are for example geometrically calculated and entered into the control unit 54 by means of an input device 55 (FIG. 1).
  • the geometric values of the entire arrangement can also be input via the input device 55, after which the control unit 54 then calculates the curves 42 to 45 and 48 to 53 (as well as all necessary further ones).
  • a sensor 56 is provided on the bearing block for the holder 10, to which a projection 57 of the support 25 of the holder 10 is assigned.
  • the sensor 56 is set, for example, in such a way that it delivers a maximum signal when the projection 57 is arranged exactly in front of it.
  • the projection 57 is oriented relative to the holder 10, for example, such that it lies exactly in front of the sensor 56 when the nozzles 9c are positioned in the extension of the guide channel 8.
  • the drive unit 14 is then controlled, for example by means of the control unit 54, at each angular position W, such as the sley 2, so that the sensor 56 always delivers a maximum signal to the control unit 54.
  • the angular position W of the sley 2 and the angular position R of the drive unit 14 are each recorded, for example, by encoder disks, not shown, which deliver signals to the control unit 54 as a function of the angular position W of the sley 2 and the angular position R of the drive unit 14.
  • the movement course of the drive unit 14 determined in this way is stored as an adjustment curve in the control unit 54. This Adjustment curve can then be compared with curve 44, which was theoretically determined.
  • control unit 54 determines the tolerances on the basis of the deviations between the adjustment curve and the curve 44. Corrected curves 42 to 45 and 48 to 53 can then be calculated taking these tolerances into account. If necessary, the adjustment can be repeated several times until the adjustment curve determined by the adjustment coincides with the calculated curve 44.
  • An adjustment curve can also be determined by attaching a stop in a defined adjustment position on the shop profile 4, against which the holder 10 or the support 25 of the holder rests.
  • the drive unit 14 is then controlled such that the holder 10 or the support rests against this stop at any angular position W of the sley 2.
  • the associated angular position R of the drive unit 14 can thus be determined for each angular position W of the sley 2.
  • This adjustment course can then be converted into a movement course, a nozzle being positioned in the extension of the guide channel 8.
  • the different movements and the different transition phases are not limited to curves 42 to 45 and 48 to 53. Rather, they can be selected and adapted in a different way in order to ensure that a specific nozzle is positioned in front of the guide channel 8 and / or is held in front of the guide channel 8.
  • the invention is not limited to a holder 10 with eight nozzles 9. Rather, it can also be used if more or fewer nozzles 9 are provided. In the simplest embodiment, the invention can be used if at least two nozzles are to be optionally positioned in front of a guide channel 8. The advantage of the invention is of course greater if there are more than two nozzles 9.
  • other coupling elements are provided instead of the leaf spring 16.
  • a rod can be provided which is arranged corresponding to the leaf spring 16 and which is articulated with a ball joint to the holder 10 of the nozzles 9 and with the other end to the crank mechanism 32 of the drive unit 14 by means of a ball joint.
  • Coupling elements of this type permit spatial movements between the drive unit 14 and the nozzles 9 which can be moved relative to the sley, namely by deforming the leaf spring 16 or by twisting within the ball joints.
  • the coupling elements contain a rope, one end of which is fastened to a winding roller arranged by the drive shaft 19 of the drive unit 14 and the other end of which is connected to the holder 10.
  • a spring is provided between the holder 10 and the sley 2 to keep the rope taut.
  • the rope is attached at one end by means of a spring to the weaving machine frame and at the other end to the holder 10, this rope then being wound between the two around a winding roller driven by the drive unit 14.
  • the holder 10 can cooperate with a tension spring or also with a compression spring in order to keep the rope taut.
  • the invention is also not limited to the pivotable holder 10 for nozzles 9 shown.
  • a holder which is controlled by a drive unit and which can be moved in a guide which extends essentially perpendicular to the longitudinal axis of the sley 2.
  • the nozzles can then be arranged, for example, as is known from US 49 62 795.
  • the coupling elements then engage at the level of the holder guided in a guide for the orifices of the nozzles.
  • the guide channel 8 does not have to be part of the reed 7. Rather, a guide channel formed independently of the reed can also be used, as is known, for example, from US Pat. No. 4,644,980.
  • the device according to the invention is particularly suitable for easily positioning nozzles in the extension of a guide channel 8 before the insertion of weft threads and for keeping these nozzles 9 essentially in the extension of the guide channel 8 during the weft thread insertion.
  • the device according to the invention can also be used to position other parts of a weaving machine as a function of a moving sley in order to bring and hold these parts in a specific position in relation to the sley.

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

Abstract

La présente invention concerne un dispositif permettant d'insérer un fil de trame dans un métier à tisser à tuyères. Selon cette invention, un support (10), destiné à plusieurs tuyères (9), est monté de façon à pouvoir se déplacer par rapport au battant (2) du métier à tisser, est positionné par rapport à un canal de guidage (8) qui se déplace de façon conjointe avec ledit battant (2), au moyen d'une unité d'entraînement (14) fonctionnant avec des séquences de mouvements définies, puis est maintenu dans cette position au moyen de cette même unité d'entraînement (14).
PCT/EP2000/003368 1999-04-20 2000-04-14 Dispositif permettant d'inserer des fils de trame dans un metier a tisser a tuyeres WO2000063474A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9900276 1999-04-20
BE9900276A BE1012620A3 (nl) 1999-04-20 1999-04-20 Inrichting en werkwijze voor het inbrengen van een inslagdraad bij een weefmachine.

Publications (1)

Publication Number Publication Date
WO2000063474A1 true WO2000063474A1 (fr) 2000-10-26

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PCT/EP2000/003368 WO2000063474A1 (fr) 1999-04-20 2000-04-14 Dispositif permettant d'inserer des fils de trame dans un metier a tisser a tuyeres

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BE (1) BE1012620A3 (fr)
WO (1) WO2000063474A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038880A1 (fr) * 2005-10-05 2007-04-12 Textilma Ag Metier a tisser a insertion de trame pneumatique
BE1019326A3 (fr) * 2009-05-06 2012-06-05 Toyota Jidoshokki Kk Metier a tisser possedant un dispositif d'insertion de trame multicolore.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047286A (en) * 1979-04-25 1980-11-26 Rueti Te Strake Bv Jet looms
DE3204007A1 (de) * 1982-02-05 1983-08-11 Guenne Webmaschf Gmbh Vorrichtung und verfahren zum einblasen verschiedenfarbiger schussfaeden bei luftduesen-webmaschinen
EP0203256A1 (fr) * 1985-05-25 1986-12-03 Günne Webmaschinenfabrik GmbH & Co. KG Dispositif d'insertion de trame pour métiers à tisser avec tuyères pivotables et procédé pour l'insertion pneumatique de longueurs de trame
US4644980A (en) * 1984-12-28 1987-02-24 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for inserting weft yarn in a fluid jet loom

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497240A1 (fr) * 1980-12-30 1982-07-02 Saurer Diederichs Sa Dispositif a buse mobile pour insertion pneumatique de la trame sur une machine a tisser sans navette
IT1163166B (it) * 1983-03-25 1987-04-08 Roy Electrotex Spa Presentatrice di fili di trama per telai di tessitura
DE3815088C1 (fr) * 1988-05-04 1989-12-07 Lindauer Dornier Gmbh, 8990 Lindau, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047286A (en) * 1979-04-25 1980-11-26 Rueti Te Strake Bv Jet looms
DE3204007A1 (de) * 1982-02-05 1983-08-11 Guenne Webmaschf Gmbh Vorrichtung und verfahren zum einblasen verschiedenfarbiger schussfaeden bei luftduesen-webmaschinen
US4644980A (en) * 1984-12-28 1987-02-24 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for inserting weft yarn in a fluid jet loom
EP0203256A1 (fr) * 1985-05-25 1986-12-03 Günne Webmaschinenfabrik GmbH & Co. KG Dispositif d'insertion de trame pour métiers à tisser avec tuyères pivotables et procédé pour l'insertion pneumatique de longueurs de trame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007038880A1 (fr) * 2005-10-05 2007-04-12 Textilma Ag Metier a tisser a insertion de trame pneumatique
BE1019326A3 (fr) * 2009-05-06 2012-06-05 Toyota Jidoshokki Kk Metier a tisser possedant un dispositif d'insertion de trame multicolore.

Also Published As

Publication number Publication date
BE1012620A3 (nl) 2001-01-09

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