EP0982419A2 - Mécanisme de formation de la foule pour machines Jacquard - Google Patents

Mécanisme de formation de la foule pour machines Jacquard Download PDF

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Publication number
EP0982419A2
EP0982419A2 EP99202700A EP99202700A EP0982419A2 EP 0982419 A2 EP0982419 A2 EP 0982419A2 EP 99202700 A EP99202700 A EP 99202700A EP 99202700 A EP99202700 A EP 99202700A EP 0982419 A2 EP0982419 A2 EP 0982419A2
Authority
EP
European Patent Office
Prior art keywords
shed
hook
forming mechanism
elements
mechanism according
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.)
Granted
Application number
EP99202700A
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German (de)
English (en)
Other versions
EP0982419A3 (fr
EP0982419B1 (fr
Inventor
Bram Vanderjeugt
Lode Puype
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Individual
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Individual
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Publication date
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Publication of EP0982419A2 publication Critical patent/EP0982419A2/fr
Publication of EP0982419A3 publication Critical patent/EP0982419A3/fr
Application granted granted Critical
Publication of EP0982419B1 publication Critical patent/EP0982419B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/06—Double-lift jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/12—Multiple-shed jacquards, i.e. jacquards which move warp threads to several different heights, e.g. for weaving pile fabrics
    • 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 shed-forming mechanism for open-shed jacquard machines. With such a mechanism the warp threads of the weaving machine are operated according to the open-shed principle in order to implement weaving according to a jacquard pattern.
  • Shed-forming mechanisms are in themselves known for two or multiple-position open-shed jacquard machines, whereby the warp threads are operated via hook elements which by means of elastic selection elements, under influence of for example electromagnetic selector means, can be hooked on to upward and downward moving knives, while the hook elements operate the warp threads either via a tackle element (shed-forming device with tackle mechanism) or for example via a heddle (tackleless shed-forming mechanism).
  • a three-position open-shed jacquard machine implements the three-position open-shed with a set of upper and a set of lower lifting knives, two complementary hooks interconnected by a tackle cord to a tackle element.
  • the complementary hooks are selected by two selection elements located one above the other in one and the same plane. The three positions are therefore implemented within the partition of one selection element.
  • the long legs of the hooks are pressed sideways by the upper lifting knives with their descent before the selection can take place.
  • the electromagnetic coil is not energised the long hooks have to spring back sufficiently fast in order to hook on to the projecting edge of the lifting knives.
  • the springing back of the hooks is determined by the spring force which the hooks can develop and the inertia of the hooks. Making the spring stiffness of the hooks greater results in more electric power having to be supplied to the electromagnets in order to hold the hooks away from the lifting knives when engagement of the hooks by the lifting knives has to be prevented. Furthermore because of this the mass inertia of the hook is also increased.
  • the second, lower electromagnets have to attract the short legs of the hooks whereby the magnetic circuit is made over two layers of material: that of the short and the long legs. Moreover the magnetic flux flows through both steel strips of the hooks: more electric power will therefore be required in order to make the short hook bend because loss of flux occurs in the second material layer.
  • this jacquard device furthermore takes up a relatively large space in height.
  • the construction height must be correspondingly high enough in order to limit the angle of incidence of the harness cord in the arcade plank to 60° in order to counteract harness wear and tear through friction.
  • the purpose of this invention is to provide a shed-forming mechanism for jacquard machines that excludes the disadvantages of the known mechanisms.
  • a shed-forming mechanism which comprises:
  • each spring element comprises at least two spring legs whereby in each case one push selector is provided in order to be able to act on one spring leg.
  • the push selectors which according to the invention are used for acting on the elastic selection elements preferably consist of mechanical, electromechanical, piezoelectric selector means, or similar.
  • the shed-forming mechanism according to the invention with push selectors as selection means for acting on the elastic selection elements, can very suitably be utilised for two or multiple-position open-shed jacquard machines.
  • the shed-forming mechanism according to the invention can moreover very suitably be utilised for example for: a two-position open-shed jacquard machine in which two complementary hooks are interconnected by a tackle cord that via a tackle element serves for lifting a warp thread of the weaving machine, or for a tackleless two-position open-shed jacquard machine in which the hook elements are connected to a heddle element with which a warp thread of the weaving device can be lifted.
  • At least one or more stationary holding knives are provided in order to hold the hook in an intermediate position.
  • the shed-forming mechanism according to the invention can furthermore be provided with a guide for preventing the hook on the longer spring leg from falling off the knife with a downward movement of the knife.
  • the shed-forming device according to the invention depicted in figure 1 comprises:
  • figure 1 the situation is presented for a first pick position (left top knife in top dead position) of a shed-forming device for a three-position open-shed jacquard machine, with shed formation in middle position.
  • figure 5 the situation is represented for a second pick position (left top knife in bottom dead position) of a shed-forming device for a three-position open-shed jacquard machine, with shed formation in middle position; in figures 6 - 8, analogous to figures 2 - 6, the situations are shown such as those with a following pick position (second pick position) which can be reached from the starting position from figure 5, namely the situations with shed formation respectively in top, middle and bottom position.
  • the height of the jacquard machine can be reduced for one and the same lifting height stated as purpose.
  • the hook rests on the underlying knife gratings with a nose which rests on a projection on the underside of the lifting knives.
  • the upper knives take the hooks further upwards on a supporting surface which is located on top of the lifting knives.
  • any mechanical, electromechanical or piezoelectric element can be used that is capable of pushing a flexible hook on to the lifting knives or stationary knives.
  • figures 9 up to and including 13 in figures 9 - 11 the right-hand set of hook elements, selection elements and selector means of the mechanism according to figures 1 up to and including 8 are shown schematically, with shed formation respectively in bottom (figure 9), middle (figure 10) and top position (figure 11), respectively for a first pick position (in solid line, left in each figure) and for a second pick position (in dotted line, right in each figure); figures 12 and 13 show the transition diagram to and from the various situations which are depicted in figures 9 - 11.
  • FIG. 14 up to and including 16 an alternative embodiment of a shed-forming mechanism according to the invention is schematically shown (in analogous manner as for figures 9 up to and including 12), whereby permanent magnets (20), (21) are provided on the hook elements (5), (6) and whereby the bending of the hooks is achieved by electromagnetic repulsion by the selector means (Mm) and Mt).
  • Figures 17 and 18 show front and rear views of two different embodiments or complementary elastic selection elements (spring hooks) for a three-position shed-forming mechanism according to the invention, with a long spring leg (6) and a short spring leg (5), and with a top suspension hook (24), a middle suspension hook (23) and a bottom suspension hook (22).
  • spring hooks complementary elastic selection elements
  • Figures 19 up to and including 27 finally show schematic representations of various embodiments of push selectors for a shed-forming mechanism according to the invention, in electromagnetic embodiments (figures 19 - 21 and 23 - 27) and in piezoelectric embodiment (figure 22).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19990202700 1998-08-24 1999-08-20 Mécanisme de formation de la foule pour machines Jacquard Expired - Lifetime EP0982419B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9800624 1998-08-24
BE9800624A BE1012129A3 (nl) 1998-08-24 1998-08-24 Gaapvormingsmechanisme voor jacquardmachines.

Publications (3)

Publication Number Publication Date
EP0982419A2 true EP0982419A2 (fr) 2000-03-01
EP0982419A3 EP0982419A3 (fr) 2000-03-08
EP0982419B1 EP0982419B1 (fr) 2003-06-18

Family

ID=3891404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990202700 Expired - Lifetime EP0982419B1 (fr) 1998-08-24 1999-08-20 Mécanisme de formation de la foule pour machines Jacquard

Country Status (3)

Country Link
EP (1) EP0982419B1 (fr)
BE (1) BE1012129A3 (fr)
DE (1) DE69908874T2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217113A3 (fr) * 2000-10-25 2002-07-31 NV Michel van de Wiele Dispositif de formation de la foule sans poulies pour métier à tisser
EP1217112A3 (fr) * 2000-12-21 2002-07-31 NV Michel van de Wiele Mécanique jacquard à trois positions
EP1357210A4 (fr) * 2000-12-14 2004-05-12 Takemura Techno Works Co Ltd Selecteur d'aiguilles de mecanique jacquard
WO2005028723A3 (fr) * 2003-09-20 2005-09-09 First Spa Procede d'accouplement utilise dans le domaine de la technique textile
US7057329B2 (en) * 2003-10-02 2006-06-06 Albany International Corp. Compact Jacquard selecting card using piezoelectric elements
JP5326149B1 (ja) * 2012-12-18 2013-10-30 Ｃｓｓ株式会社 電子ジャカード機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1523252A (fr) * 1967-02-28 1968-05-03 Mecaniques Verdol Soc D Perfectionnements aux mécaniques d'armure à double lève
DE4116163A1 (de) * 1991-03-13 1992-09-17 Textilma Ag Fachbildevorrichtung fuer eine textilmaschine
BE1009047A4 (nl) * 1995-01-17 1996-11-05 Wiele Michel Van De Nv Driestanden open-gaap jacquardmachine.
BE1009137A4 (nl) * 1995-02-20 1996-12-03 Wiele Michel Nv Van De Driestanden niet-open-gaap jacquardmachine.
BE1009268A3 (nl) * 1995-04-04 1997-01-07 N.V. Michel Van De Wiele Driestanden open-gaap jacquardmachine.
FR2742170B1 (fr) * 1995-12-12 1998-01-23 Staubli Verdol Perfectionnements aux mecaniques d'armures a double leve

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217113A3 (fr) * 2000-10-25 2002-07-31 NV Michel van de Wiele Dispositif de formation de la foule sans poulies pour métier à tisser
BE1013788A3 (nl) * 2000-10-25 2002-08-06 Wiele Michel Van De Nv Takelloze gaapvormingsinrichting voor een weefmachine.
US6478055B2 (en) 2000-10-25 2002-11-12 N.V. Michel Van De Wiele Pulleyless shed-forming device for a weaving machine
EP1357210A4 (fr) * 2000-12-14 2004-05-12 Takemura Techno Works Co Ltd Selecteur d'aiguilles de mecanique jacquard
EP1217112A3 (fr) * 2000-12-21 2002-07-31 NV Michel van de Wiele Mécanique jacquard à trois positions
BE1013880A3 (nl) * 2000-12-21 2002-11-05 Wiele Michel Van De Nv Driestanden-jacquardmachine.
US6581646B2 (en) 2000-12-21 2003-06-24 N.V. Michel Van De Wiele Three-position-jacquard machine
WO2005028723A3 (fr) * 2003-09-20 2005-09-09 First Spa Procede d'accouplement utilise dans le domaine de la technique textile
US7057329B2 (en) * 2003-10-02 2006-06-06 Albany International Corp. Compact Jacquard selecting card using piezoelectric elements
RU2347017C2 (ru) * 2003-10-02 2009-02-20 Олбэни Интернэшнл Корп. Компактная жаккардовая карта с использованием пьезоэлектрических элементов
JP5326149B1 (ja) * 2012-12-18 2013-10-30 Ｃｓｓ株式会社 電子ジャカード機

Also Published As

Publication number Publication date
DE69908874D1 (de) 2003-07-24
EP0982419A3 (fr) 2000-03-08
BE1012129A3 (nl) 2000-05-02
DE69908874T2 (de) 2004-05-19
EP0982419B1 (fr) 2003-06-18

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