EP0823501B2 - Verfahren und Vorrichtung zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung sowie Jacquardwebmaschine - Google Patents

Verfahren und Vorrichtung zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung sowie Jacquardwebmaschine Download PDF

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Publication number
EP0823501B2
EP0823501B2 EP97420133A EP97420133A EP0823501B2 EP 0823501 B2 EP0823501 B2 EP 0823501B2 EP 97420133 A EP97420133 A EP 97420133A EP 97420133 A EP97420133 A EP 97420133A EP 0823501 B2 EP0823501 B2 EP 0823501B2
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EP
European Patent Office
Prior art keywords
hook
hooks
point position
dead point
lever
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 - Lifetime
Application number
EP97420133A
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English (en)
French (fr)
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EP0823501B1 (de
EP0823501A1 (de
Inventor
Jean-Paul Froment
Dario Bassi
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.)
Staeubli Lyon SA
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Staeubli Lyon SA
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Filing date
Publication date
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Application filed by Staeubli Lyon SA filed Critical Staeubli Lyon SA
Publication of EP0823501A1 publication Critical patent/EP0823501A1/de
Publication of EP0823501B1 publication Critical patent/EP0823501B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/16—Verdol or other jacquards having intermediate power-operated needles between reading needles and lifting-hooks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types

Definitions

  • the invention relates to a method and a device for selecting the movable hooks of a shedding mechanism of a Jacquard weaving loom and a Jacquard weaving loom comprising such a device.
  • a shedding mechanism selectively raises heddles comprising a grommet into which a warp thread passes, which thread is located, depending on the position of a hook to which the hoop is attached. upper end of the bar, above or below the weft yarn moved by the loom.
  • the mechanical properties of the harness must therefore be provided to allow the application of this additional vertical force downwards, which increases its manufacturing cost, as well as the mechanical recall devices that it includes and, more generally, mechanical drive parts that must be over-sized. In addition, this increases the wear phenomena of all the Jacquard mechanics and the harness. In addition, the efforts required to overcome the frictional forces are likely to generate vibrations in the trade, these vibrations may have negative consequences on the operation and life of the moving parts of the loom.
  • the main object of the invention is to solve these problems and to provide a method and a device for selecting the mobile hooks of the loom for optimizing the sizing of the harness and the mechanical parts for driving or elastic return, while maintaining the efficiency of a selection device with leveling.
  • the invention relates to a method for selecting the movable hooks of a shedding mechanism of a jacquard loom comprising at least one hook moved by a knife between a top dead center position, in or near which the hook can be immobilized by a selection device, and a bottom dead position.
  • a method and device are known to DE-A-37 24 686 .
  • the method of the invention is characterized in that it consists in exerting individually on said hook, during each passage of said hook in its top dead center position or close thereto, a force tending to return said hook towards its position of low dead point, this force being exerted on this hook only in the vicinity of its position of top dead center.
  • the forces thus exerted compensate the friction and inertia forces and it is no longer necessary for the harness to exert sufficient force on the movable hooks to overcome these, which makes it possible to simplify and lighten the construction of the loom and the harness.
  • the force exerted on the hook is chosen to be substantially equal to the resultant of the friction forces exerted by its environment on the hook and the forces of inertia. This effort substantially offsets the forces that oppose the change of direction of the hook at the top dead center of its trajectory.
  • the invention also relates to a device for implementing the method of the invention and, more specifically, a device for selecting the movable hooks of a shedding mechanism of a Jacquard loom comprising at least one less a hook moved by a knife between a top dead center position, in or near which the hook can be immobilized by a selection device, and a bottom dead position, characterized in that it comprises means for elastic stop of said hook in its top dead center position, said means being able to exert individually on said hook during each passage of said hook in its top dead center position or close thereto and only in the vicinity of this position, a force tending to return said hook to its bottom dead center position.
  • the device of the invention thus makes it possible to substantially cancel the effect of the friction and inertia forces applied to the hook when it is in its top dead center position or close thereto.
  • the force exerted by the elastic stop compensates for the inertia of the hook itself.
  • the invention makes it possible to apply directly to the movable hook the force which is necessary to put it in motion downwards from the top dead center of its trajectory.
  • the device comprises two hooks displaced alternately by two knives animated with reciprocating movement in opposition of phase, the elastic stop means being able to cooperate with said two hooks.
  • a single elastic stop means can be used for two hooks, which keeps the device of the invention a simple character.
  • the elastic stop means may comprise a lever able to be displaced against the force of a spring by the hook when it reaches its top dead center position.
  • the force exerted on the hook in its top dead center position, or close to it, according to the invention is, in this case, due to the elastic force of the spring.
  • the lever is adapted to be moved by the hooks when they reach their top dead center position. respectively.
  • the resilient stop means may comprise a torsion spring.
  • This torsion spring can be in direct contact with the hooks of the shedding mechanism, which allows to obtain, with a very low cost, the desired function.
  • the invention finally relates to a Jacquard loom comprising a selection device as previously described.
  • a warp 1 comes from a beam 2.
  • Each warp passes through the eyelet 3 has a smooth 3 to open the pitch to allow the passage of a pick to form the fabric that s 4.
  • the lower end of each loom is connected to the frame of the loom by a tension spring 5, while its upper end is secured to an arcade 6.
  • the arches are raised and lowered by means of a mechanism for forming the loom. the referenced crowd 7.
  • the shedding mechanism comprises a funicular member 8 at each end of which is associated a hook 9.
  • the hooks comprise a lateral nose 9a capable of cooperating with knives 10 animated vertical reciprocating movements in phase opposition.
  • the funicular element 8 passes around a first pulley 11 of a rudder 12 whose second pulley 13 is surrounded by one of the arches 6.
  • the end thereof opposite to that which is connected to the stringer 3 is anchored to a fixed point 14 of the frame of the machine.
  • the upper part of the mechanism 7 is provided with retaining hooks in the form of levers 15 and belonging to a selection device.
  • the levers 15 are associated with a single electromagnet 16, so that when the electromagnet is energized, the levers are moved toward the center or held pressed against the electromagnet 16 after being moved by a hook 9.
  • the curved ends of the lower branches 15 has levers 15 cooperating with the upper curved ends 9b of the hooks 9 in order to immobilize them in their top dead center position or close to it, in the situation where is represented the hook of the left part of the figure 2 while the hook of the right part is shown in the bottom dead center position.
  • Each lever 15 is articulated about a pivot 18 and includes a lower arm 15 is intended to cooperate with the upper beak 9 b with a hook 9 and an upper leg 15 b to be moved or held in position by the electromagnetic force generated by the electromagnet 16.
  • the upper branch 15b of each lever 15 is kept away from the electromagnet 16 by a spring 19 which is compressed when the upper nozzle 9b of the hook 9 moves the lower end of the leg 15 a of the lever 15 upon arrival of the hook 9 in its dead center position .
  • the hook 9 In the position of the figure 3 the hook 9 is immobilized in position because it can not come back down under the effect of the traction exerted on it by the funicular element 8 because of the blocking made by the lever 15 under the effect of the spring 19.
  • the hook 9 is slightly lifted so that its upper beak 9 b escapes the leg 15 a of the lever 15. If the electromagnet 16 is activated at this time the leg 15 a is held away from the spout 9 and b is not opposed to the spout 9 of the movement downwards bearing on the knife 10. on the contrary, if the electromagnet 16 is not activated, the spring 19 pushes the lever 15 towards its engagement position with the spout 9 b .
  • the top dead center position of the hook 9 is located above the upper position of the figure 4 .
  • the cutter 10 pushes the hook 9 upwards to release the hook 9 b with respect to the end of the leg 15 a of the lever 15.
  • the hook 9 is in contact with a stop 20 formed by a cam lever has two extensions 20 a and 20 b adapted to bear against the hooks 9 when they are in their top dead point position or close to it -this.
  • the abutment or lever 20 rests on two axes 21 and 22 fixed relative to the housing of the shedding mechanism 7.
  • the lever 20 is supported on the pins 21 and 22 by a spring 23 disposed above the lever 20, c that is to say on the opposite side to the axes 21 and 22.
  • the movement of the knife 10 moves the lever 20 towards the position shown in FIG. figure 4 against the force of the spring 23.
  • the lever 20 constitutes an elastic abutment for the movement of the hook 9.
  • the forces F 1 and F 2 are substantially proportional to the force F 0 .
  • an inertial force proportional to the mass of the hook 9 opposes its downward movement.
  • the hook 9 is subjected to a force F 3 exerted by the end 20 a of the lever 20 due to the compression of the spring 23. Given the location of the lever 20, the force F 3 is exerted on the hook 9 only when it is in the vicinity of the top dead center of its trajectory, so that the movement of the hook is not modified by the presence of the lever 20 over most of its trajectory .
  • the funicular element 8 must no longer exert a force on the hook 9 when starting in its downward stroke.
  • the arch 6 must no longer exert such effort; this is why the spring 5 that appears at the figure 1 can be dimensioned only to absorb the forces due to the tension of the warp son, friction against the fixed parts of the loom and the inertia of the arches and smooth and no longer to pull the hook 9 down.
  • the drive parts of the mechanism can be dimensioned to withstand lower forces and the vibrations generated by this device compared to those of the prior art are lower.
  • the lever 20 can serve as an elastic abutment to the two hooks 9, which keeps the device a simplicity guaranteeing its economic performance.
  • the device represented in figure 6 is a variant of the invention in which the lever is replaced by a torsion spring 40 whose central portion surrounds an axis 41 fixed relative to the frame of the mechanism 7.
  • the operation is similar to that described for the device of Figures 1 to 4 and the spring 40 is able to exert on the hooks 9 a force directed downwards when they reach their top dead center positions.
  • This variant has, by its great simplicity of realization, the advantage of being particularly economical.
  • the selection device comprises a plurality of hooks arranged in a module, for example 8 times 2 hooks, these hooks being able to be selected by several blades arranged in a module side by side
  • the lever 20 or the spring 40 is common to all the hooks of a module and can cooperate with each of them.
  • the invention is also applicable to a shedding mechanism in which the retaining levers are not articulated but wherein the movable hooks are locked in position by fixed elements.
  • the elastic stop means are mounted on the movable hooks themselves.
  • the invention also relates to a loom comprising a selection device as previously described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Automatic Assembly (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Push-Button Switches (AREA)
  • Toys (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Claims (9)

  1. Verfahren zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung (7) einer Jacquardwebmaschine mit wenigstens einem Haken (9), bewegt durch ein Messer (10) zwischen einer oberen Totpunktstellung, in der oder in deren Nähe der genannte Haken durch eine Wahleinrichtung (15, 16) immobilisiert werden kann, und einer unteren Totpunktstellung,
    dadurch gekennzeichnet,
    dass es darin besteht, jedesmal wenn der genannte Haken seine obere Totpunktstellung erreicht oder sich in deren Nähe befindet, eine Kraft (F3) auf diesen Haken individuell auszuüben, die versucht, ihn in seine untere Totpunktstellung zurückzubringen, wobei die genannte Kraft auf den genannten Haken nur in der Nähe seiner oberen Totpunktstellung ausgeübt wird.
  2. Wahlverfahren nach Anspruch 1, dadurch gekennzeichnet, dass die genannte Kraft (F3) im Wesentlich gleich der Resultierenden der Trägheitskräfte und der Reibungskräfte (F1, F2), die durch seine Umgebung (15, 24) auf den genannten Haken (9) ausgeübt werden, ist.
  3. Vorrichtung zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung (7) einer Jacquardwebmaschine mit wenigstens einem Haken (9), bewegt durch ein Messer (10) zwischen einer oberen Totpunktstellung, in der oder in deren Nähe der genannte Haken durch eine Wahleinrichtung (15, 16) immobilisiert werden kann, und einer unteren Totpunktstellung, dadurch gekennzeichnet, dass sie elastische Anschlageinrichtungen (20-23, 40, 41) des genannten Hakens in seiner oberen Totpunktstellung umfasst, wobei diese Anschlageinrichtungen fähig sind, auf den genannten Haken jedes Mal dann, wenn dieser Haken seine obere Totpunktstellung erreicht oder sich in deren Nähe befindet, und nur in der Nähe dieser Stellung, eine Kraft (F3) individuell auszuüben, die versucht, den Haken in seine untere Totpunktstellung zu stossen.
  4. Wahlvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass sie zwei Haken (9) umfasst, abwechselnd bewegt durch zwei Messer (10), die gegenphasige Wechselbewegungen ausführen, wobei die genannten elastischen Anschlageinrichtungen (20-23, 40, 41) für ein Zusammenwirken mit den genannten beiden Haken geeignet sind.
  5. Wahlvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die genannten elastischen Anschlageinrichtungen (20-23) einen Hebel (20) umfassen, der durch den genannten Haken (9) gegen die Kraft einer Feder (23) bewegt werden kann, wenn dieser Haken seine obere Totpunktstellung erreicht.
  6. Wahlvorrichtung nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, dass der Hebel (20) zwei Verlängerungen (20a, 20b) umfasst, die sich auf den genannten beiden Haken (9) abstützen, wenn diese ihre obere Totpunktstellung erreichen.
  7. Wahlvorrichtung nach den Ansprüchen 5 oder 6, dadurch gekennzeichnet, dass der genannte Hebel (20) sich unter der Wirkung der Kraft der genannten Feder (23) auf zwei Achsen (21, 22), um die er schwenken kann, einfach abstützt, wobei der Hebel jeweils um die Achse schwenkt, die dem ihn bewegenden Haken (9) entgegengesetzt ist.
  8. Wahlvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die elastischen Anschlageinrichtungen eine Torsionsfeder (40) umfassen.
  9. Jacquardwebmaschine mit einer Wahlvorrichtung nach einem der Ansprüche 3 bis 8.
EP97420133A 1996-08-06 1997-07-28 Verfahren und Vorrichtung zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung sowie Jacquardwebmaschine Expired - Lifetime EP0823501B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9610083 1996-08-06
FR9610083A FR2752246B1 (fr) 1996-08-06 1996-08-06 Procede et dispositif de selection des crochets mobiles d'un mecanisme de formation de la foule et metier a tisser du type jacquard

Publications (3)

Publication Number Publication Date
EP0823501A1 EP0823501A1 (de) 1998-02-11
EP0823501B1 EP0823501B1 (de) 2001-11-07
EP0823501B2 true EP0823501B2 (de) 2008-02-27

Family

ID=9494968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97420133A Expired - Lifetime EP0823501B2 (de) 1996-08-06 1997-07-28 Verfahren und Vorrichtung zur Wahl der beweglichen Haken einer Fachbildungsvorrichtung sowie Jacquardwebmaschine

Country Status (11)

Country Link
US (1) US5839481A (de)
EP (1) EP0823501B2 (de)
JP (1) JP3575960B2 (de)
KR (1) KR100403262B1 (de)
CN (1) CN1084809C (de)
AT (1) ATE208442T1 (de)
DE (1) DE69707995T3 (de)
ES (1) ES2163727T5 (de)
FR (1) FR2752246B1 (de)
PT (1) PT823501E (de)
TW (1) TW380176B (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011710A3 (nl) * 1998-01-19 1999-12-07 Wiele Michel Nv Van De Gaapvormingsinrichting voor weefmachines.
BE1011711A5 (nl) * 1998-01-19 1999-12-07 Wiele Michel Nv Van De Gaapvormingsinrichting voor het individueel sturen van de kettingdraden van een weefmachine.
KR20010028662A (ko) * 1999-09-22 2001-04-06 박영승 전자식 복동 자카드 개구 장치
US6216748B1 (en) * 1999-12-10 2001-04-17 Wis Seaming Equipment, Inc. Pivoting magnet latches for improved weaving device
US6318415B1 (en) * 1999-12-10 2001-11-20 Wis Seaming Equipment Inc. Quick release coupling/pulley assembly for improved weaving device
US6216749B1 (en) * 1999-12-10 2001-04-17 Wis Seaming Equipment, Inc. Weaving device
BE1013353A5 (nl) 2000-03-17 2001-12-04 Wiele Michel Van De Nv Hakenselectie-inrichting voor een gaapvormingsinrichting voor een weefmachine.
BE1013880A3 (nl) * 2000-12-21 2002-11-05 Wiele Michel Van De Nv Driestanden-jacquardmachine.
CN2476569Y (zh) * 2001-04-02 2002-02-13 张海林 提花机的提综控制装置
FR2846343B1 (fr) * 2002-10-25 2004-12-17 Staubli Lyon Mecanisme de formation de la foule et metier a tisser equipe d'un tel mecanisme
JP4192713B2 (ja) * 2003-07-25 2008-12-10 富士ゼロックス株式会社 アリールアミン化合物、電荷輸送材料、電子写真感光体、画像形成装置及びプロセスカートリッジ
FR2900666B1 (fr) * 2006-05-03 2008-06-20 Staubli Lyon Soc Par Actions S Mecanisme de formation de la foule, metier a tisser equipe d'un tel mecanisme et procede de selection des crochets mobiles d'un tel mecanisme
CN102002788B (zh) * 2010-12-14 2013-12-25 上海超诚电子科技有限公司 开口装置、开口装置组件及提花机
BE1019710A3 (nl) * 2010-12-21 2012-10-02 Wiele Michel Van De Nv Gaapvormingsinrichting voor een weefmachine.
CN102719965B (zh) * 2012-06-09 2014-09-17 浙江引力纺织机械有限公司 抗疲劳自复位竖钩及组装有该竖钩的提花机提针组件
CN202786615U (zh) * 2012-07-13 2013-03-13 太平洋机电(集团)有限公司 适用于扁平纤维织造的综丝装置
BE1021506B1 (nl) * 2012-11-19 2015-12-03 Nv Michel Van De Wiele Module geschikt voor inbouw in een jaquardmachine
BE1021951B1 (nl) * 2014-07-18 2016-01-28 Michel Van De Wiele Nv Gaapvormingsinrichting voor een weefmachine
FR3118070B1 (fr) 2020-12-21 2022-12-23 Staubli Lyon Mecanisme de formation de la foule et metier a tisser de type jacquard
FR3118069B1 (fr) 2020-12-21 2024-01-12 Staubli Lyon Mecanisme de formation de la foule et metier a tisser de type jacquard
WO2023147164A1 (en) * 2022-01-31 2023-08-03 Unspun, Inc Manufacturing woven textile products

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374279A1 (de) † 1987-08-26 1990-06-27 Grosse Webereimaschinen GmbH Niederhaltevorrichtung für durch Jacquardmaschinen gesteuerte Webmaschinen
DD283429A5 (de) † 1988-12-29 1990-10-10 Grosse Webereimaschinen Gmbh,De Niederhaltevorrichtung fuer durch jacquardmaschinen gesteuerte webmaschinen
EP0408076A1 (de) † 1989-07-14 1991-01-16 N.V. Michel Van de Wiele Vorrichtung zur Platinenwahl an einer elektronisch gesteuerten Jacquardmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524569A1 (de) * 1985-07-10 1987-01-22 Wolfgang Herold Webstuhl mit einzellitzensteuerung
FR2586432B1 (fr) * 1985-08-23 1987-11-13 Staubli Verdol Dispositif pour la formation de la foule d'un metier a tisser
FR2587045B1 (fr) * 1985-09-06 1987-10-23 Staubli Verdol Dispositif pour la formation de la foule d'un metier a tisser comportant un crochet de retenue basculant
DE3724686A1 (de) * 1987-07-25 1989-02-02 Schleicher Oskar Fa Fachbildevorrichtung fuer textilmaschinen, insbesondere webmaschinen
DE4116163A1 (de) * 1991-03-13 1992-09-17 Textilma Ag Fachbildevorrichtung fuer eine textilmaschine
DE4116164A1 (de) * 1991-03-13 1992-09-17 Textilma Ag Fachbildevorrichtung fuer eine textilmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374279A1 (de) † 1987-08-26 1990-06-27 Grosse Webereimaschinen GmbH Niederhaltevorrichtung für durch Jacquardmaschinen gesteuerte Webmaschinen
US5010927A (en) † 1987-08-26 1991-04-30 Grosse Webereimaschinen Gmbh Hold-down device for Jacquard-controlled looms
DD283429A5 (de) † 1988-12-29 1990-10-10 Grosse Webereimaschinen Gmbh,De Niederhaltevorrichtung fuer durch jacquardmaschinen gesteuerte webmaschinen
EP0408076A1 (de) † 1989-07-14 1991-01-16 N.V. Michel Van de Wiele Vorrichtung zur Platinenwahl an einer elektronisch gesteuerten Jacquardmaschine

Also Published As

Publication number Publication date
JP3575960B2 (ja) 2004-10-13
FR2752246A1 (fr) 1998-02-13
ES2163727T3 (es) 2002-02-01
DE69707995T2 (de) 2002-04-04
PT823501E (pt) 2002-04-29
KR19980018399A (ko) 1998-06-05
TW380176B (en) 2000-01-21
KR100403262B1 (ko) 2004-02-11
EP0823501B1 (de) 2001-11-07
DE69707995T3 (de) 2008-09-11
EP0823501A1 (de) 1998-02-11
JPH1096134A (ja) 1998-04-14
CN1176322A (zh) 1998-03-18
FR2752246B1 (fr) 1998-10-09
US5839481A (en) 1998-11-24
ATE208442T1 (de) 2001-11-15
DE69707995D1 (de) 2001-12-13
CN1084809C (zh) 2002-05-15
ES2163727T5 (es) 2008-06-16

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