EP0187181B1 - Métier à tisser - Google Patents

Métier à tisser Download PDF

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Publication number
EP0187181B1
EP0187181B1 EP85100206A EP85100206A EP0187181B1 EP 0187181 B1 EP0187181 B1 EP 0187181B1 EP 85100206 A EP85100206 A EP 85100206A EP 85100206 A EP85100206 A EP 85100206A EP 0187181 B1 EP0187181 B1 EP 0187181B1
Authority
EP
European Patent Office
Prior art keywords
cutting element
reed
edge
cutting
weft yarn
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.)
Expired
Application number
EP85100206A
Other languages
German (de)
English (en)
Other versions
EP0187181A1 (fr
Inventor
Friedrich Lutz
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer 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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Priority to EP85100206A priority Critical patent/EP0187181B1/fr
Priority to DE8585100206T priority patent/DE3566005D1/de
Priority to US06/814,096 priority patent/US4646790A/en
Priority to JP61001500A priority patent/JPS61167061A/ja
Publication of EP0187181A1 publication Critical patent/EP0187181A1/fr
Application granted granted Critical
Publication of EP0187181B1 publication Critical patent/EP0187181B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D45/00—Looms with automatic weft replenishment
    • D03D45/50—Cutting, holding, manipulating, or disposing of, weft ends
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the invention relates to a weaving machine with a weft thread supply arranged outside the shed and a reed for striking at least one weft thread inserted into the shed each against a blade weft line and with two cutting elements assigned to the input side fabric edge and an actuating device coupled to the drive of the loom, via which at least one of the Cutting elements can be adjusted transversely to the weaving plane in accordance with the weft insertion rhythm in each case between an ineffective first operating position at a distance from a weaving plane determined by the blade stop line and the fabric edge and a second operating position located in the region of the weaving plane and suitable for guiding the weft thread to be cut, and at least one of the cutting elements for cutting the inserted weft from the weft supply is movable relative to the other cutting element.
  • This known arrangement requires - in order to avoid contact of the cutting elements with the upper part of the reed at the blade stop and when the reed subsequently falls - relatively large adjustment paths of the guide parts carrying the cutting elements and a correspondingly relatively long period of time within the working cycle of the weaving machine, this period of time is only available after the reed has fallen out of the adjustment range of the cutting elements.
  • the invention has for its object to provide a weaving machine improved in this regard with a separating device, the cutting elements of which can be brought into a cutting position within a smaller adjustment range than before and within a period of time of the working cycle of the weaving machine which also covers the blade stop and the beginning of the receding of the reed are allowed to cut the weft thread at a smaller distance from the fabric edge than before.
  • the one cutting element in the first operating position and in the second operating position is arranged at a lateral distance from the range of movement of the reed, and that the actuating device contains an additional drive connection via which the cutting element in question in each case from the second operating position is adjustable into a third operating position, which is laterally adjacent to the fabric edge and is within the range of movement of the reed, and this third operating position is intended for cutting off the weft thread.
  • the inventive design of the separating device leads to a particularly compact design of the device with components that are advantageous for small adjustment paths of only a few millimeters, for. B. 10 mm, between the first and the second or between the second and the third operating position of the cutting elements.
  • the inventive design of the separation device also allows the initiation of the separation operation, i. H. the lowering of the adjustable cutting element from the first into the second operating position, already during the leaf stop, so that during the initial phase of the receding of the reed the weft thread to be cut can be guided by the adjustable cutting element and the cutting element can be adjusted into the cutting position given by the third operating position.
  • the cutting element that can be guided against the fabric edge from the side according to the invention can be precisely adjusted in a particularly simple manner.
  • a cutting position can be achieved in which the fabric edge abuts against the cutting element, so that all weft ends projecting from the fabric edge are cut off substantially to the same length.
  • a structurally particularly simple and reliable embodiment which is characterized in particular by a simple design of the actuating device connected to the machine drive, can be achieved in a further embodiment of the invention in that the additional drive connection of the actuating device is arranged transversely with a swivel device with a fixed mounting of the weaving machine to the weft insertion direction arranged pivot axis about which the one cutting element between the second operating position and the third operating position can be pivoted back and forth.
  • a fabric with advantageously short weft ends projecting from the fabric edge can be achieved in that the deflecting edge is determined by a surface part of the cutting element facing away from the shed, which includes an obtuse angle with the guide surface of the cutting element in question.
  • the part of the cutting element containing the deflection edge can have a trapezoidal cross section, which can be designed according to the required strength of the separating element, the small side of the cross section forming the guide surface for the weft thread determining the length of the weft thread end projecting from the fabric edge and the the large side of the cross section facing away from the weft thread can be selected according to the desired cross section size.
  • the second operating position of the one cutting element is provided between the range of movement of the reed and the range of movement of a guide element coupled to it, which is arranged essentially upright at a corresponding lateral distance from the adjacent edge part of the reed and for Guidance of the weft thread section to be detected by the cutting element is determined.
  • the part of the weft thread to be cut that immediately adjoins the fabric edge can be held in a simple manner essentially in the extension of the blade weft line, so that the adjustable cutting element can be lowered very close to the blade stop line behind the weft thread to be cut off, which during the blade stop the subsequent decline of the reed and the guide element can be released from it, brought together with the cutting element and then cut off.
  • FIG. 1 shows parts of a weft insertion device 1, part of a sley 2 as well as warp threads 3 and weft threads 4 of a rapier weaving machine.
  • the warp threads 3 are guided from a warp beam, not shown, through heald frames and rivet rods 12, not shown, of a reed 11 arranged on the sley 2 and run in the direction of arrow 9 against a fabric tree, not shown, which picks up the fabric.
  • the weft insertion device 1 contains a bring gripper 6 which can be driven via a gripper belt 5 and which is inserted via a belt guide 7 into the shed 8 formed in each case between the warp threads 3.
  • a weft thread 4 can be inserted into the shed 8 from a supply spool (not shown) arranged outside the shed 8, through a guide eyelet 10 which is movable or fixed according to FIG. 1.
  • a guide eyelet 10 which is movable or fixed according to FIG. 1.
  • the tip of the weft thread 4 is transferred in a known manner to a slave gripper, not shown, which ends the weft insertion.
  • the gripper 6 can also insert several weft threads at the same time.
  • the reed 11 can be pivoted via the sley 2 coupled to the drive of the weaving machine between the rear position drawn in full lines in FIG. 1 and a front position 11 ′ shown in dash-dot lines, the weft thread 4 last entered along a line 50 in the tip of the shed 8 is struck on a sheet stop line 13 at which the fabric 14 begins.
  • the lateral edges 15 of the fabric 14 can each be formed by correspondingly controlled leno warp threads 3a.
  • Arranged on the sley 2 in line with the reed 11 is an upright guide pin 16 which can be guided against the last inserted weft thread 4 and which in its forward position 16 'holds the weft thread 4 approximately in an imaginary extension 13a of the leaf weft line 13.
  • the reed 11 and the guide pin 16 are arranged at such a distance from one another that a cutting element 18 of a separating device 17 assigned to the fabric edge 15 can be inserted from above between the swivel areas of the reed 11 and the guide pin 16.
  • the separating device 17 contains a coupling which is coupled to the drive of the weaving machine Actuating device 20 for the cutting element 18 and a cooperating cutting element 19.
  • the actuating device 20 contains two angle levers 21 and 22 which are mounted next to one another on a common pivot axis 23 arranged transversely to the running direction of the warp threads 3 and movable relative to one another.
  • the angle levers 21 and 22 each have a support arm 21a a or 22a projecting beyond the extension 13a of the blade stop line 13 and an upright adjustment arm 21b or 22b.
  • the cutting element 18 is screwed onto the end of the support arm 21a which projects beyond the extension 13a.
  • the cutting element 19 is arranged on a leaf spring 19a which is screwed onto a holder 29 which is articulated on the support arm 22a.
  • the leaf spring 19a is under the action of a compression spring 24 supported on the angle lever 21, by means of which the cutting element 19 is pressed against the front guide surface 18a of the cutting element 18 facing the extension 13a of the leaf stop line 13.
  • the guide surface 18a contains a shear edge 18b which runs essentially parallel to the blade stop line 13 and is formed on an approximately U-shaped guide cut 18c (FIG. 4) of the cutting element 18.
  • the opening of the guide incision 18c is on the side of the cutting element 18 facing away from the fabric edge 15.
  • the lower edge is designed as a shear edge 19b.
  • the two angle levers 21 and 22 are braced against one another by a compression spring 25 arranged between their support arms 21a and 22a, the adjusting arm 21b being pressed against a stop head 22c of the angle lever 22 in the operating positions according to FIGS. 2-5 and the cutting element 19 above the Guide incision 18c is held.
  • the pivot axis 23 of the angle levers 21 and 22 is fastened in a holder 26 which is fastened by means of a clamp connection on a pivot axis 27 arranged transversely to the weft insertion direction (arrow 45).
  • the pivot axis 27 is mounted in a pivot bearing 28 which is screwed onto a stationary support part 30 of the weaving machine.
  • a stop lever 31 is attached in a rotationally fixed manner by means of a clamping connection. Attached to the free end of the stop lever 31 is a stop head 43 which can be adjusted and locked by means of an adjusting screw 42 and which is intended to cooperate with a stop part 44 (FIG.
  • a pivot lever 32 is fastened by a clamping connection, which together with an adjusting ring 33 which can be adjustably fastened on the pivot axis 27, the axial position of the pivot axis 27 with respect to the pivot bearing 28, and thus the corresponding position of the separating device 17 with respect to the sheet stop line 13.
  • An adjustment rod 34 is articulated on the pivot lever 32, the other end of which, as shown in FIG. 6, is articulated on a roller lever 35.
  • a corresponding adjusting rod 36 is articulated on the adjusting arm 22b of the angle lever 22 and on a roller lever 37.
  • the roller levers 35 and 37 are arranged so as to be pivotable about an axis 40, are spring-supported on a holding part 41 of the weaving machine and cooperate with cams 38 and 39 which are arranged on a drive shaft, not shown, which is coupled to the drive of the weaving machine.
  • Ball joints are provided at the articulation points of the adjustment rods 34 and 36, which permit spatial adjustment movements.
  • the angle levers 21 and 22 are arranged by appropriate adjustment of the holder 26 and the pivot lever 32 and the adjusting rods 34 and 36 in an inclined position in which their common pivot axis 23 in the operating positions according to FIGS. 2 and 3 is one of the representation according to FIG. 4 has a corresponding inclination to the horizontal.
  • the angle levers 21 and 22 pressed against one another at the stop head 22c are pivoted together via the adjusting rod 36 synchronously with the drive of the weft insertion device 1 during the sheet stop from the position shown in FIG. 2 into the position according to FIGS. 3 and 4 .
  • the cutting element 18 is moved from the ineffective first operating position (basic position) located above the extension 13a of the blade stop line 13 to a second operating position 18 'located behind the extension 13a of the blade stop line 13, in which the shear edge 18b lies below the weft thread 4 to be cut off (FIG . 1, 3 and 4). 4, the front position (stop position) 11 'and 16' of the reed 11 and the guide pin 16 is shown in full lines.
  • the weft thread 4 to be cut is guided against the cutting element 18 and thereby comes out of the position 4 shown in broken lines in FIG. 1 ', in which it runs in a straight line between the guide eye 10 and the guide pin 16 located in the front position 16', in the position drawn with full lines.
  • the weft thread 4 is at the same time gripped by the gripper 6 moved in the direction of arrow 45 and on the cutting element 18 at a shearing edge 18b which limits the depth of the guide incision 18c subsequent deflecting edge 18d deflected.
  • the fabric edge 15 is set at a lateral distance A from the cutting element 18 in the second operating position, which is greater than the distance between the cutting element 18 and the leading edge warp thread in this second operating position Rietstab 12 of the reed 11 in the front position 11 '.
  • the pivot axis 27 is pivoted counterclockwise via the adjusting rod 34 and the pivot lever 32 in FIG. 4, so that the holder 26 and the two angle levers 21 and 22 resting against one another on the stop head 22c from the angle lever shown in FIGS. 3 and 4 position shown in the position of FIG. 5, in which the pivot axis 23 is substantially parallel to the blade stop line 13.
  • the cutting element 18 is pivoted substantially parallel to the blade stop line 13 into a third operating position 18 ′′ located within the swivel range of the reed 11 and brought to the outermost warp thread 3.
  • the stop head 22c is lifted from the adjustment arm 21b, and the support arm 22a is lowered against the action of the compression spring 25 relative to the support arm 21a a, whereby the cutting element 19 is pushed along the guide surface 18a over the guide cut 18c and with its shear edge 19b over the shear edge 18b of the cutting element 18 is guided.
  • the weft thread 4 previously deflected at the deflection edge 18d into the position 4 ′′ is moved against the shear edge 18b and essentially cut off at the deflection point.
  • the cutting elements 18 and 19 are then returned to the basic position according to FIG. 2 returned.
  • the length of the weft thread ends 4a protruding from the fabric edge 15 and remaining on the fabric 14 corresponds to the width of the part of the guide surface 18a remaining in the area of the deflection edge 18d, measured parallel to the sheet weft line 13. 1, this area portion facing the extension 13a of the blade stop line 13 can be made particularly narrow if it forms an obtuse angle with the base surface 18e of the guide incision 18c forming the deflection edge 18d, so that the cutting element 18 in the region of the guide incision 18c can have a trapezoidal cross section, which ensures the required strength of the cutting element 18.
  • the separating device 17 can also be used in connection with multi-shot looms in which several, e.g. B. three, weft threads are entered in the shed in any order, only the weft thread intended for the following weft insertion being passed to the entry member and merged with the cutting element 18, while the weft threads not involved in this weft insertion, initially remaining on the fabric, pass through appropriately controlled guide elements are kept at a distance from the work areas of the input member and the cutting elements.
  • several, e.g. B. three, weft threads are entered in the shed in any order, only the weft thread intended for the following weft insertion being passed to the entry member and merged with the cutting element 18, while the weft threads not involved in this weft insertion, initially remaining on the fabric, pass through appropriately controlled guide elements are kept at a distance from the work areas of the input member and the cutting elements.
  • the described or a corresponding separating device can also be used on weaving machines with other weft insertion systems, e.g. B. on projectile or drag looms, or on weaving machines with a fluid, for. B. pneumatic entry means can be used.
  • modified embodiments of the separation device described, for. B. those with scissors interacting cutting elements can be lowered from above and arranged from the side against the fabric edge.
  • the cutting elements can also be used transversely to the blade stop line, e.g. be arranged parallel to the running direction of the warp threads, running cutting edges.

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

Claims (4)

1. Métier à tisser comprenant une réserve en fils de trame disposée à l'extérieur de la foule (8) et un peigne (11) destiné à bourrer, à chaque fois, un fil de trame (4) inséré dans la foule (8) sur une ligne (13) d'impact de ce peigne, ainsi que deux éléments sectionneurs (18, 19) associés à la lisière (15) du tissu située côté insertion, et un dispositif d'actionnement (20) qui est accouplé à l'entraînement du métier à tisser et par l'intermédiaire duquel au moins l'un des éléments sectionneurs (18,19) peut être respectivement déplacé, transversalement par rapport au plan de tissage et en concordance avec le rythme d'insertion de la trame, entre une première position de service inactive située à distance d'un plan de tissage délimité par la ligne (13) d'impact du peigne et par la lisière (15) du tissu, et une deuxième position de service (18') qui se trouve au voisinage du plan de tissage et se prête au guidage du fil de trame (4) devant être sectionné, et au moins l'un des éléments sectionneurs (18, 19) est mobile par rapport à l'autre élément sectionneur (19, 18) en vue de dissocier, par sectionnement, le fil de trame inséré (4) d'avec la réserve en fils de trame, caractérisé par le fait que, dans la première position de service et dans la deuxième position de service (18'), l'un (18) des éléments sectionneurs se trouve latéralement à distance de la plage de mouvements du peigne (11); et par le fait que le dispositif d'actionnement (20) renferme une liaison d'entraînement supplémentaire par l'intermédiaire de laquelle l'élément sectionneur considéré (18) peut, à chaque fois, être déplacé de la deuxième position de service (18') à une troisième position de service (18") qui est latéralement plus proche de la lisière (15) du tissu et se situe dans le limites de la plage de mouvements du peigne (11), et inversement, cette troisième position de service (18") étant destinée à sectionner le fil de trame (4).
2. Métier à tisser selon la revendication 1, caractérisé par le fait que la liaison d'entraînement supplémentaire du dispositif d'actionnement (20) présente un dispositif de pivotement (32, 34) muni d'un axe de pivotement (27) qui est implanté dans une portée fixe (28) du métier à tisser, transversalement par rapport au sens d'insertion de la trame (flèche 45), et autour duquel un pivotement alternatif peut être imprimé à l'un (18) des éléments sectionneurs, entre la deuxième position de service (18') et la troisième position de service (18").
3. Métier à tisser selon la revendication 1 ou 2, équipé d'un élément sectionneur (18) muni d'une surface (18a) de guidage du fil de trame (4) devant être sectionné, qui s'étend pour l'essentiel parallèlement au sens d'insertion de la trame (flèche 45) et sur laquelle sont ménagées une arête de cisaillement (18b) et, transversalement par rapport à celle-ci, une arête (18d) de déviation du fil de trame (4), caractérisé par le fait que l'arête de déviation (18d) est délimitée par une partie superficielle (18e) de l'élément sectionneur (18) qui est tournée à l'opposé de la foule (8) et qui forme un angle obtus avec la surface de guidage (18a) de l'élément sectionneur considéré (18).
4. Métier à tisser selon l'une des revendications précédentes, caractérisé par le fait que la deuxième position de service (18') de l'un (18) des éléments sectionneurs est prévue entre la plage de mouvements du peigne (11) et la plage de mouvements d'un élément de guidage (16) qui est accouplé à ce dernier, se dresse pour l'essentiel verticalement à une distance latérale correspondante de la partie marginale attenante de ce peigne (11), et est destiné à guider la partie du fil de trame devant être saisie par l'élément sectionneur (18).
EP85100206A 1985-01-10 1985-01-10 Métier à tisser Expired EP0187181B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP85100206A EP0187181B1 (fr) 1985-01-10 1985-01-10 Métier à tisser
DE8585100206T DE3566005D1 (en) 1985-01-10 1985-01-10 Loom
US06/814,096 US4646790A (en) 1985-01-10 1985-12-27 Cutting mechanism for a weaving machine
JP61001500A JPS61167061A (ja) 1985-01-10 1986-01-09 織機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85100206A EP0187181B1 (fr) 1985-01-10 1985-01-10 Métier à tisser

Publications (2)

Publication Number Publication Date
EP0187181A1 EP0187181A1 (fr) 1986-07-16
EP0187181B1 true EP0187181B1 (fr) 1988-11-02

Family

ID=8193222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100206A Expired EP0187181B1 (fr) 1985-01-10 1985-01-10 Métier à tisser

Country Status (4)

Country Link
US (1) US4646790A (fr)
EP (1) EP0187181B1 (fr)
JP (1) JPS61167061A (fr)
DE (1) DE3566005D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703638C1 (de) * 1987-02-06 1988-05-19 Dornier Gmbh Lindauer Schussfadenabschneidevorrichtung
US9862564B2 (en) * 2013-10-25 2018-01-09 Columbia Insurance Company Cutter assembly for stretched yarn

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES314730A1 (es) * 1965-06-28 1965-10-01 Ballbe Sabate Mariano Un aparato para cortar el hilo de trama en los telares
CH499644A (de) * 1969-11-21 1970-11-30 Fischer Ag Brugg Georg Schussgarnschneidvorrichtung an einer Webmaschine
GB1401051A (en) * 1971-06-21 1975-07-16 Somet Soc Mec Tessile Cutting device for looms
US3924622A (en) * 1973-10-11 1975-12-09 Mead Johnson & Co Zero-order release method
US4194537A (en) * 1976-10-04 1980-03-25 Vyzkumny Ustav Bavlnarsky Arrangement for guiding a weft thread end under tension toward a fabric fell in travelling-wave looms
JPS5937382B2 (ja) * 1977-08-25 1984-09-10 株式会社ナカ技術研究所 建物用手摺
CH651331A5 (de) * 1981-07-06 1985-09-13 Saurer Ag Adolph Kantenschneidvorrichtung fuer eine webmaschine.
JPS59109788A (ja) * 1982-12-16 1984-06-25 Toshiba Corp 高速増殖炉用熱交換器

Also Published As

Publication number Publication date
US4646790A (en) 1987-03-03
DE3566005D1 (en) 1988-12-08
EP0187181A1 (fr) 1986-07-16
JPS61167061A (ja) 1986-07-28

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