EP0273350A2 - Procédé et dispositif pour guider les fils de trame dans les métiers à tisser - Google Patents

Procédé et dispositif pour guider les fils de trame dans les métiers à tisser Download PDF

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Publication number
EP0273350A2
EP0273350A2 EP87118950A EP87118950A EP0273350A2 EP 0273350 A2 EP0273350 A2 EP 0273350A2 EP 87118950 A EP87118950 A EP 87118950A EP 87118950 A EP87118950 A EP 87118950A EP 0273350 A2 EP0273350 A2 EP 0273350A2
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EP
European Patent Office
Prior art keywords
weft
weft thread
drawer
reed
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.)
Ceased
Application number
EP87118950A
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German (de)
English (en)
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EP0273350A3 (fr
Inventor
Johny Debaes
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
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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
Publication of EP0273350A2 publication Critical patent/EP0273350A2/fr
Publication of EP0273350A3 publication Critical patent/EP0273350A3/fr
Ceased legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a method for guiding weft threads before, during and after their insertion into the fabric. Furthermore, the present invention relates to a device which carries out the method according to the invention. The invention also relates to weaving machines to which the method according to the invention is applied and to weaving machines which are provided with a device according to the invention.
  • the manipulations that a weft thread experiences during weaving are as follows. After the previous weft has been cut off, the cut outer end of the next weft is held at two points in such a way that the aids which pull the weft through the compartment can take the outer end with it. Those two points are generally on the one hand the clamping device of the weft cutting device and on the other hand a weft guide element. Then that weft is pulled through the compartment by the weft insertion aids. When the weft is completely pulled through the shed, that new weft is pressed against the fabric by the reed, whereupon the weft cutter cuts that weft and the outer end of the next weft remains clamped.
  • the method and the device according to the invention are particularly applicable to rapier weaving machines.
  • the tools for inserting the weft threads consist of a plurality of rapier rods, one of which is mounted there on each side of the reed.
  • the first looper bar the so-called master looper bar
  • the second looper bar, the so-called driver Gripper bar takes the weft thread and pulls it completely through the compartment.
  • the weft cutting device can be fixed to the frame or movably mounted on the drawer.
  • the weft guiding member generally consists of a weft threading needle, which is attached to the frame or attached to the drawer and thus moves with the reed.
  • this attachment of the weft guide element brings with it several problems during the various phases of handling the weft thread.
  • a common problem is that the weft rubs against the warp threads as it is pulled through the compartment.
  • the weft can break or a loss of weft occurs due to the friction and possibly inhibition of flame yarns.
  • Certain warp threads, especially the outermost warp threads, can also break due to wear.
  • synthetic yarns, such as polyester yarns the warp threads can melt due to the heat that occurs as a result of the friction.
  • weft guide element Another consequence of this attachment of the weft guide element is that the weft thread is drawn in more or less sharp kinks in some positions of the reed, since not all elements which lead to the weft thread do not lie on one line, while the same weft thread in others Positions of the reed stays straight.
  • additional measures such as a recuperation tensioner are provided.
  • the aim of the present invention is to provide a solution to the problems mentioned, so that the economy and the productivity of the looms are increased.
  • the method for guiding the weft threads in weaving machines is characterized in that the weft thread moves through three successive positions with respect to the drawer of the weaving machine at the height of the weft thread cutting device at the location where the weft thread insertion means come off with a new weft thread: namely by a first position, the so-called driver position, in which the outer end of the weft thread, which comes from the yarn bobbin, is passed to the weft thread insertion aids when they come off to insert a new weft thread, then by a second position, the so-called Entry position, in which the weft thread is in the triangle, which is delimited by the warp threads underneath and the surface of the reed as it is pulled through the compartment, further by a third position, the so-called stop position, in which the Hold the weft along a sufficiently straight line parallel to the reed n and is passed to the weft cutting device at the moment when the reed is in its stop position, whereupon the
  • the device according to the invention for guiding the weft threads in weaving machines has the feature that at the height of the insertion device at the place where the weft thread insertion aids come off with a new weft thread, a weft thread guiding element which is movable with respect to the drawer of the weaving machine is provided moved by means of a drive through three successive positions, namely through a first position, the so-called driver position, in which the outer end of the weft thread, which comes from the yarn bobbin, is passed to the weft thread insertion aids if the latter before the insertion of a new weft thread then go through a second position, the so-called entry position, in the the weft is in a triangle, which is delimited by the warp threads below and above and the surface of the reed as it is pulled through the compartment, and then by a position, the so-called stop position, in which the weft along a sufficiently straight line Line is held parallel to the reed and is passed to the we
  • the weft guide element is movably mounted on the drawer of the weaving machine and is driven by a curve with its curve roller follower via a rod mechanism.
  • Figure 1 represents the sley, which is rotatably mounted in the main frame of the loom with rotary shaft (2) and on which the sheet (3) is mounted, the upper and lower looper rods (or 4 and 5) and the weft cutting device (6)
  • the weft cutting device (6) consists of two weft scissors (11 and 12) which are arranged one above the other and which are pivotably mounted on the sley with a supporting part (29).
  • the weft guide element consists of a weft thread needle (7 and 8) for each weft thread that runs through the eyelet of its weft needle.
  • FIG. 2 shows the three movement positions for each weft thread, namely the driver position in FIG. 2a, the insertion position in FIG. 2b and the stop position in FIG. 2c.
  • the weft thread is brought in the method according to the invention into a position which lies within the triangle, the lower and upper warp threads (36 and 37) and from the front surface of the reed (3) is limited.
  • that position is also in front of the front surface of the rapier (4 and 5): position B or the entry position of the eyelet of the weft needles (7 and 8) (FIG. 1) in this case.
  • the weft thread is moved in such a way that it comes to lie parallel to the reed and on a sufficiently straight line.
  • these weft threads are absorbed into the fabric, and the outer ends reach their third position C, the stop position, in this case the eyelet of the weft needle.
  • the weft thread is brought up to the weft scissors (11) of the cutting device (6), which is pivoted with respect to the drawer (1) during the stop movement (FIG. 3). While in the case of a firmly attached weft thread guide element (13) (dashed line in FIG.
  • a further advantage is that the weft thread can rather follow a straight line when using the invention, while in the case of a fixed weft thread guiding element the weft thread makes a number of deflections, which necessitates the use of a weft thread recuperation tensioner.
  • FIG. 2a The three positions of the weft guide element with respect to the reed (3) are indicated in FIG. 2a.
  • the point from which the weft thread comes is moved downwards and forwards so that the entry position B is reached.
  • that point moves forward simultaneously with the drawer and is also subject to an additional movement (upwards and backwards beyond position A) into position C at the stop of the weft scissors.
  • that point moves backwards simultaneously with the drawer and is subject to an additional movement (forwards) so that the driver position A above the gripper is reached.
  • the point from which the weft thread comes thus moves with respect to the drawer along an arc falling towards the front (FIG. 2a).
  • the weft guide element is movably attached to the drawer of the weaving machine.
  • That preferred embodiment consists of a support (15) (FIG. 1) which has a rotatable connection at three points corresponding to the corner points of a triangle.
  • a first rotatable connection with a support (16) fixedly attached to the drawer (1) is established via a pivot point (17) through which the support (15) is pivotably attached to the drawer (1).
  • a second rotatable connection which lies above the first one, takes place via a pivot point (19) with a holder (18).
  • a third rotatable connection with a rod (20) takes place via a pivot point (21).
  • the holder (18) preferably has an L shape on, the long leg (22) has two rotatable connections.
  • a first rotatable connection which lies approximately in the middle of that long leg (22), takes place via the pivot point (19) with the support (15) and a second rotatable connection, which is arranged approximately at the outer end of that long leg (22) , over a fulcrum (24) with a short rod (23).
  • the other outer end of the rod (23) is also connected to the carrier (16) via a pivot point (25).
  • the short leg (26) of the carrier (18) carries the two superposed weft needles (7 and 8).
  • the movement of the support (15) with respect to the drawer (1) is brought about by a cam disc (27) with a cam roller (28) via the rod (20).
  • That cam disc (27) can be fastened rotatably about the rotary shaft (2) of the drawer (1) or on another shaft (30) of the weaving machine, as shown in FIG. 1.
  • the cam (27) is driven by known aids, not shown, for driving the weaving machine.
  • the cam roller (28) sits on the outer end of a lever (31), the center (32) of which is rotatably connected to part of the frame (33), and the other end of which is connected by a rod (34) to the lowest end of the rod ( 20) is connected.
  • That rod (34) is connected to the lever (31), for example by a clamping connection (35), so that the device according to the invention can be adapted to the width of the fabric in that the carrier (16) on the drawer (1) in the direction of the width. is moved.
  • the weft needles (7 and 8) are therefore subject to a combined movement: on the one hand they are subject to the movement of the drawer (1) and on the other hand a relative movement with respect to that drawer (1).
  • the position of the weft needles shown in FIG. 1 corresponds to the driver position A of FIG. 2a. If the Moving the rod (20) upwards, the weft needles move upwards and backwards with respect to the drawer (1) and can reach the stop position C (FIGS. 2a and 2c). If the rod (20) moves downward, the weft needles move downwards and forwards with respect to the drawer (1) and can reach the entry position B (FIGS. 2a and 2b).
  • the eyelet of the weft needles (7 and 8) along the desired curvature through the three intended positions (FIG. 2a) according to the method according to the invention can thus be used on the double-piece loom with grippers and a pivotable weft cutting device, which was chosen here as an example, because it is representative of the latest developments in the field of rapier weaving machines.
  • the positions of the weft thread required according to the method according to the invention will, however, depend on the type of weaving machine for which the invention is used.
  • the relative movement of the weft needles (7 and 8) with respect to the drawer (1) can be determined in any case by changing the spatial arrangement of the rotatable connections of the support (15) on the one hand and the holder (18) on the other hand and by the fact that the shape of the cam disc (27), the cam roller (28) and the lever (31) is adjusted.
  • this embodiment of the device according to the invention can already be adapted to a large number of weaving machine types. It may be necessary to attach the device according to the invention to the rear of the drawer (1) so that the insertion position of the weft thread lies between the insertion aids and the reed.
  • the advantages of the method according to the invention are numerous.
  • the deflections of the weft threads are avoided on the warp threads, so that fewer weft or warp thread tears occur and flame yarns can be woven excellently.
  • the melting of synthetic yarns is switched off so that they can be woven at higher speeds both in the warp and in the weft. In certain cases, a weft recuperation device becomes superfluous.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19870118950 1986-12-30 1987-12-21 Procédé et dispositif pour guider les fils de trame dans les métiers à tisser Ceased EP0273350A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE07217669A BE906126A (nl) 1986-12-30 1986-12-30 Werkwijze en inrichting voor het geleiden van de inslagdraden bij weefmachines.
BE906126 1986-12-30

Publications (2)

Publication Number Publication Date
EP0273350A2 true EP0273350A2 (fr) 1988-07-06
EP0273350A3 EP0273350A3 (fr) 1990-10-31

Family

ID=3844126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870118950 Ceased EP0273350A3 (fr) 1986-12-30 1987-12-21 Procédé et dispositif pour guider les fils de trame dans les métiers à tisser

Country Status (4)

Country Link
US (1) US4875507A (fr)
EP (1) EP0273350A3 (fr)
BE (1) BE906126A (fr)
DD (1) DD267069A5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690466A1 (fr) * 1992-04-23 1993-10-29 Chemnitzer Wedmaschinenbau Gmb Dispositif pour la présentation du fil de trame aux pinces des machines à tisser à pinces.
CN106245208A (zh) * 2016-08-30 2016-12-21 江苏友诚数控科技有限公司 一种喷气织机筘动纬剪机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1008211A5 (nl) * 1993-07-29 1996-02-13 Wiele Michel Van De Nv Inrichting voor het positioneren van een inslagschaar op een weefmachine.
CN101113548B (zh) * 2007-08-29 2010-06-09 常州市润源经编机械有限公司 一种带有纬纱切割装置的缝编机
EP3060707B1 (fr) * 2013-10-24 2019-10-02 Vandewiele NV Tête de lance donneuse, lance donneuse, machine à tisser à lances et procédé permettant d'insérer un fil de trame dans ladite machine à tisser à lances en utilisant ladite tête de lance donneuse
WO2017134645A1 (fr) * 2016-02-05 2017-08-10 Kurkute Sanjay Coupe-fils de trame monté à battant oscillant pour métier à lance sans navette

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE621952A (fr) *
US3157208A (en) * 1961-02-14 1964-11-17 Alsacienne Constr Meca Weaving frame having improved weft handling means
CH408807A (fr) * 1962-06-26 1966-02-28 Dewas Raymond Machine à tisser comportant au moins un inséreur et un dispositif de guidage et de contrôle du fil de trame
AT258229B (de) * 1964-09-02 1967-11-10 Elitex Zavody Textilniho Greiferschützen- oder Greifer-Webstuhl
FR1563843A (fr) * 1968-01-18 1969-04-18
US3916956A (en) * 1974-12-10 1975-11-04 Joan Fabrics Corp Needle loom for weaving plush fabric
DE2934474B1 (de) * 1979-08-25 1980-10-16 Dornier Gmbh Lindauer Einrichtung zur zwangslaeufigen Betaetigung der Klemmvorrichtung von Schussfadeneintragorganen bei schuetzenlosen Webmaschinen
DE3243628C2 (de) * 1982-11-25 1985-01-24 Lindauer Dornier Gmbh, 8990 Lindau Schützenlose Webmaschine mit Schußfadeneintrag durch ins Webfach vorgeschobene und wieder zurückgezogene Greifer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690466A1 (fr) * 1992-04-23 1993-10-29 Chemnitzer Wedmaschinenbau Gmb Dispositif pour la présentation du fil de trame aux pinces des machines à tisser à pinces.
BE1005835A3 (fr) * 1992-04-23 1994-02-15 Chemnitzer Webmasch Gmbh Dispositif de presentation de la duite a la lance de metier a tisser a lancer.
DE4213333C2 (de) * 1992-04-23 2001-05-23 Chemnitzer Webmaschb Gmbh Vorrichtung zum Darbieten des Schußfadens an die Greifer von Greiferwebmaschinen
CN106245208A (zh) * 2016-08-30 2016-12-21 江苏友诚数控科技有限公司 一种喷气织机筘动纬剪机构

Also Published As

Publication number Publication date
EP0273350A3 (fr) 1990-10-31
DD267069A5 (de) 1989-04-19
US4875507A (en) 1989-10-24
BE906126A (nl) 1987-06-30

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