EP1874987B1 - Metier jacquard a element bistable pour lever et abaisser des fils de chaine - Google Patents

Metier jacquard a element bistable pour lever et abaisser des fils de chaine Download PDF

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Publication number
EP1874987B1
EP1874987B1 EP06742566A EP06742566A EP1874987B1 EP 1874987 B1 EP1874987 B1 EP 1874987B1 EP 06742566 A EP06742566 A EP 06742566A EP 06742566 A EP06742566 A EP 06742566A EP 1874987 B1 EP1874987 B1 EP 1874987B1
Authority
EP
European Patent Office
Prior art keywords
jacquard machine
bistable element
stable
stable element
machine 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.)
Not-in-force
Application number
EP06742566A
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German (de)
English (en)
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EP1874987A1 (fr
Inventor
Walter Keim
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.)
Zhejiang Grosse Precision Machinery Co Ltd
Original Assignee
ZHEJIANG GROSSE PRECISION MACHINERY CO Ltd
ZHEJIANG GROSSE PREC MACHINERY CO Ltd
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Application filed by ZHEJIANG GROSSE PRECISION MACHINERY CO Ltd, ZHEJIANG GROSSE PREC MACHINERY CO Ltd filed Critical ZHEJIANG GROSSE PRECISION MACHINERY CO Ltd
Publication of EP1874987A1 publication Critical patent/EP1874987A1/fr
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Publication of EP1874987B1 publication Critical patent/EP1874987B1/fr
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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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for

Definitions

  • the present invention relates to a jacquard machine according to the preamble of claim 1, which does not require the use of urine cords and for this purpose has a bistable element which can be deformed for raising or lowering the warp threads of a loom.
  • a generic jacquard machine is for example from the DE 43 35 620 A1 the applicant known.
  • a flat bar used as a bistable element is caused to oscillate by the action of external force, whereby a corresponding raising or lowering of a warp thread held by the board takes place via a board connected to the flat bar.
  • bistable element in very special Fashion must be designed.
  • the flat bar is subjected to specific physical and mechanical requirements during deformation, which must be taken into account in the design of the bar.
  • a particularly high cost in the design of the bistable element is required, which in turn leads to an increase in the manufacturing cost.
  • the present invention is based on the object, which in the DE 43 35 620 A1 described concept for designing a jacquard machine such that the raising and lowering of warp of a loom by means of the deformation of a bistable element can be achieved in a simple and reliable manner. It should also be taken into account in particular that the effort for the realization of a bistable element should be kept within a reasonable range.
  • the DE 43 35 620 A1 describes a concept which relates primarily to the mounting of the bistable element during operation of the jacquard machine.
  • this novel way of holding the bistable element in practice significant advantages, despite all the desired effect, namely the targeted deformation of the bistable element for raising or lowering a warp thread is reliably achieved.
  • a jacquard machine for use in a loom, which has boards for raising and lowering warp yarns of the loom, a board driving means for effecting a lifting or lowering movement of the boards, and a board selecting device which includes certain of Selects boards to hold the warp threads connected to the respective boards in an elevated or lowered state, the board drive means for each board having a bistable connected thereto, which alternately by an axially acting on the element or in the longitudinal direction outer deformation stress first stable position state, which corresponds to a raised state of the board, or a second stable state, which corresponds to a lowered state of the board occupies, and according to the invention, the bistable element is firmly clamped on both sides with its end portions in a holder and the deformation of the element by Merging the two end portions is achieved.
  • An erfmdungswasher aspect relates to the design of the bistable element itself. While it is provided in the prior art to use a single flat bar or a single leaf spring, it is proposed according to the invention to design the bistable element multi-layered and this to arrange a plurality of elastically deformable rods or leaf springs on top of each other ,
  • a jacquard machine for use in a loom, comprising boards for raising and lowering warp yarns of the loom, board driving means for effecting a raising or lowering movement of the boards, and a board selecting device which selects particular ones of the boards; in order to hold the warp threads connected to the boards concerned in an elevated or lowered state, wherein the board drive device for each board has a bistable element connected thereto, which alternately a first stable position state by an axially or longitudinally acting on the element outer deformation stress , which corresponds to a raised state of the board, or a second stable state, which corresponds to a lowered state of the board, occupies, and according to the invention, the bistable element by a multilayer ela is formed deformable rod or a multi-layer elastically deformable leaf spring with a plurality of superposed rods or springs.
  • the physical and mechanical requirements of this can be realized much better and in particular also easier.
  • the storage of the bistable element can be chosen such that when the mechanical deformation stress is exerted, one of the two of the stable position states is reached and the bistable element assumes a neutral state without the action of the mechanical deformation stress.
  • an initial device can then be provided which, in response to a control signal, effects a directed initial deflection of the bistable element from its neutral position state, such that the element assumes a specific one of the two stable position states after the deformation stress has been applied.
  • This initial device can be formed, for example, by a pair of electromagnets or a hydraulic or pneumatic piston coupled to the bistable element.
  • the jacquard machine according to the invention may have, in the vicinity of the bistable element, sensor elements with the aid of which the current positional state of the element is detected. In this way, a safe control of the bistable element in the desired position is possible.
  • Fig. 1 shows a first embodiment of the board drive in the jacquard machine according to the present invention, wherein only the arrangement for a single board is shown. According to the number of boards used in a complete jacquard machine, this arrangement accordingly exists multiple times, the board drive devices are then arranged to operate a plurality of offset in the direction of the warp threads arranged boards cascade.
  • a bistable element 1 in the form of an elastically deformable rod or an elastically deformable leaf spring.
  • the bistable element 1 can be placed in two different position states. In this case, a first positional state is illustrated by a solid line, whereas a second positional state is illustrated by the dotted line.
  • a circuit board 2 is mounted, which is non-positively and positively connected in its upper end portion 2a with the bistable element 1.
  • an eyelet 2b for carrying a warp thread 3 of a loom.
  • the circuit board 2 and hence the warp thread 3 are thus in a raised or lowered position.
  • the deformation of the bistable element 1 in one of the two illustrated states of the state takes place in a known manner in that the bistable element 1 is loaded with a deformation stress acting axially or in the longitudinal direction on the bistable element 1.
  • This is done by a hydraulic device, which two holders 5a and 5b for supporting the end portions 1a and 1b of having bistable element 1, wherein the position of the two holders 5a and 5b by means of two hydraulic cylinders 6a and 6b can be changed. So as to load the bistable element 1 with a deformation stress, the two brackets 5a and 5b are moved towards each other, to relieve the bistable element 1, the brackets 5a and 5b are removed from each other.
  • the principle of deformation of the bistable element 1 is the same as in the DE 43 35 620 A1 , After loading the element 1 with the deformation stress, this therefore assumes one of the two position states, wherein the decision as to which position is taken depends on the initial conditions before the axial load is exerted. For targeted modification of these initial conditions can be provided an Intialvorraum whose operation will be explained later.
  • the bistable element 1 is first relieved of load, this being then due to the elastic deformation together with the board 2 in the direction of the other stable situation is accelerated.
  • the kinetic energy present in the neutral position that is to say in the extended state of the bistable element 1
  • the dead point located there is overcome and the element 1 is deformed at least slightly in the direction of the respective other stable positional state.
  • the load of the bistable element 1 caused by the hydraulic cylinders 6a and 6b sets in again, so that it finally becomes deformed in such a way that it assumes the desired other stable positional state.
  • the board 2 and the warp thread 3 connected thereto are transferred from the raised to the lowered state or vice versa.
  • the warp thread 3 can be brought into a position corresponding to the pattern to be woven in this manner.
  • FIGS. 3 and 3a show the arrangement or deformation of the bistable element 1 in a storage according to the present invention, while the FIGS. 4 and 4a Comparable representations in a holder, as in the DE 43 35 620 A1 is intended to show.
  • FIG. 4 gives a bending line corresponding to a half sinusoidal line, whereas in the arrangement according to the present invention, a bending line corresponding to a complete phase of a sine curve results.
  • the deflection h of the bistable element with respect to a stretched arrangement is the same despite everything, so that the circuit board 2 connected to the bistable element 1 and thus the warp thread 3 can still be deflected in the desired manner.
  • the bending equations resulting for both storage cases and examined by Euler also show that the same parameters for the bistable element 1 give different sizes.
  • the buckling load for the bistable element 1 in the case according to the invention is four times as high as in the case of storage according to the prior art.
  • the buckling load or any other arbitrary variable can be set in the same way in both cases.
  • an advantage resulting from the storage according to the invention consists in that now improved possibilities for the realization of the bistable element 1 exist. It has been shown that the realization of the bistable Elements 1 with the help of single bars or individual leaf springs is difficult.
  • the bistable element 1 is not formed by a single component but by a plurality of bars arranged on top of each other. Like the enlarged view of the end area in FIG. 3a can be removed, now results in the holder according to the invention the advantage that the end portions 100a of the individual layers 100 of the bistable element 1 are basically aligned parallel to each other, both in the stretched as well as in the deformed or kinked state.
  • a first advantage consists in the fact that a connected bistable element 1 with the same cross-section over its entire length gives better possibilities for passing through a closed guide eye in the board strand. Furthermore, the bending force can be introduced into each individual spring of the stack by a simple and parallel moving pressure piece, whereas in the arrangement according to FIG. 4 a much higher effort would be required.
  • a mass production of a bistable element of a plurality of parallel stratified springs, which are welded together at least at one end, is also possible in the inventive storage of the element without much effort.
  • edge fiber stress in a thinner material in the same bending stress much lower than a thicker material.
  • the ratio of permissible and actual material load is thus cheaper by the multi-layer design, which has a positive effect on the life of the bistable element.
  • the danger of buckling perpendicular to the actual direction of oscillation also decreases disproportionately, since the ratio between width and thickness becomes more extreme when using a cantilever made of many individual layers with the same width and lower thickness.
  • a final advantage of the multi-layered design is that the physical and fastening properties of the bistable element 1 as a whole can be influenced in a simple manner by selecting the material for the individual layers 100 differently. It could therefore be provided that in the center of the stack, a single layer of a different material than the surrounding layers is formed, thereby to influence certain properties of the bistable element in a desired manner.
  • the inventive design and storage of the bistable element 1 is thus ensured that this can be easily and reliably deformed over a longer period of operation in the desired position state. In this way, a reliable control of the warp threads 3 of the loom is achieved.
  • the board 2 is in the correct position, for which an initial device is provided, which in the embodiment according to FIG. 1 is realized by a further hydraulic cylinder 10.
  • This initial device is used in the above-described operation of the jacquard machine as an open-jacquard machine only to safely reach the raised or lowered state at startup and could then be omitted if it is ensured by a suitable pre-deformation of the bistable element 1, that this principle at startup basically assumes one of the two stable states. Possibilities for this are also for example from the DE 43 35 620 A1 known.
  • the jacquard machine is used as a closed jacquard machine, it is known that after each weft insertion, the bistable elements 1 first assume a neutral position, that is to say a stretched state. If the bistable element 1 is then intended to be deformed specifically into one of the two positional states, the use of the initial device 10 is essential in order to achieve the deflection of the bistable element 1 in the desired direction.
  • the deflection is achieved by means of a hydraulic cylinder 10 whose front end portion 10a is coupled to the bistable element 1
  • the bistable element 1 has magnetostrictive or electrostrictive properties at least in a partial region and is deflected in a corresponding manner by the field generated with the aid of the electromagnets 11, 12.
  • two sensors 13 and 14 can also be provided, which detect the positional state of the bistable element 1 in a suitable manner.

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

Claims (9)

  1. Métier Jacquard pour utilisation dans un métier à tisser, avec des platines (2) pour lever et baisser des fils de chaînette (3) du métier à tisser, avec un dispositif d'entraînement des platines pour réaliser un mouvement de lévitation ou de baissement des platines (2) et avec un dispositif de sélection des platines qui sélectionne certaines des platines (2) pour maintenir les fils de chaînette (3), qui sont liées avec des platines (2) correspondantes, dans un état soulevé ou dans un état abaissé, dans lequel le dispositif d'entraînement des platines comprend, pour chaque platine (2), un élément bistable (1) qui est connecté avec celle-ci, et qui, par une tension de déformation extérieure qui agit sur l'élément (1) dans une direction axiale ou longitudinale, occupe alternativement un premier état de position stabile correspondant à un état soulevé de la platine (2) ou un second état de position stabile correspondant à un état abaissé de la platine (2),
    caractérisé en ce que l'élément bistable (1) est formé par un bâton multicouche élastiquement déformable ou un ressort à lames multicouche élastiquement déformable avec plusieurs bâtons ou ressorts (100) qui sont arrangés l'un sur l'autre,
    dans lequel les couches individuels (100) du bâton ou du ressort sont liés l'un avec l'autre dans ses régions terminales, et dans lequel l'élément bistable (1) est fermement serré des deux côtés avec ses régions terminales (1a, 1b) dans un crochet (5a, 5b), et dans lequel la déformation de l'élément (1) est réalisé par rallier les deux régions terminales (1a, 1b).
  2. Métier Jacquard selon revendication 1,
    caractérisé en ce que
    toutes les couches (100) du bâton ou du ressort consistent du même matériel.
  3. Métier Jacquard selon revendication 1,
    caractérisé en ce que
    au moins un couche moyen du bâton ou du ressort consiste d'un matériel qui est différent de celui des autre couches.
  4. Métier Jacquard selon une des revendications 1 à 3, caractérisé en ce que
    l'élément bistable (1) occupe, sous l'action de la tension de déformation mécanique un des deux états de position stabiles, et l'élément bistable (1) occupe, sauf l'action de la tension de déformation mécanique, un état de position neutre,
    dans lequel un dispositif d'initialisation (10, 11, 12) est prévu, qui, en fonction d'un signal de commande, cause une déviation initiale de l'élément bistable (1) de son état de position neutre, de sorte que l'élément bistable (1), depuis d'une action de la tension de déformation mécanique, occupe un certain des deux états de déformations stabiles.
  5. Métier Jacquard selon revendication 4,
    caractérisé en ce que
    le dispositif d'initialisation est formé par un aimant électrique ou par une paire d'aimants électriques (11, 12), pour exercer une composante de force sur l'élément bistable (1) après avoir appliqué un signal de commande électrique, de sorte qu'une déviation initiale correspondante est effectuée.
  6. Métier Jacquard selon revendication 5,
    caractérisé en ce que
    l'élément bistable (1) possède au moins dans une section des propriétés magnétostrictives ou électrostrictives et en ce que la déviation initiale est causé par une action d'un champ magnétique ou électrique sur la section correspondante de l'élément bistable (1).
  7. Métier Jacquard selon revendication 4,
    caractérisé en ce que
    le dispositif d'initialisation comprend un piston hydraulique ou pneumatique (10), qui est accouplé à l'élément bistable (1) et qui, après pressurisation avec une pression de fonctionnement ou une dépression de fonctionnement, cause la déviation initiale de l'élément bistable (1).
  8. Métier Jacquard selon une des revendications 1 à 7,
    caractérisé en ce que
    à proximité de l'élément bistable (1) des éléments de détection (13, 14) sont prévus pour acquérir l'état de position de l'élément bistable (1).
  9. Métier Jacquard selon une des revendication 1 à 8,
    caractérisé en ce que plusieurs de dispositifs d'entraînement des platines qui sont arrangés en cascade sont prévus pour opérer plusieurs de platines (2) qui sont échelonnées dans la direction des fils de chaînette.
EP06742566A 2005-04-25 2006-04-11 Metier jacquard a element bistable pour lever et abaisser des fils de chaine Not-in-force EP1874987B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005019102A DE102005019102A1 (de) 2005-04-25 2005-04-25 Jaquardmaschine mit bistabilem Element zum Heben und Senken von Kettfäden
PCT/EP2006/003329 WO2006114199A1 (fr) 2005-04-25 2006-04-11 Metier jacquard a element bistable pour lever et abaisser des fils de chaine

Publications (2)

Publication Number Publication Date
EP1874987A1 EP1874987A1 (fr) 2008-01-09
EP1874987B1 true EP1874987B1 (fr) 2012-03-21

Family

ID=36685579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06742566A Not-in-force EP1874987B1 (fr) 2005-04-25 2006-04-11 Metier jacquard a element bistable pour lever et abaisser des fils de chaine

Country Status (6)

Country Link
EP (1) EP1874987B1 (fr)
KR (1) KR20080004616A (fr)
CN (1) CN101184875B (fr)
AT (1) ATE550465T1 (fr)
DE (1) DE102005019102A1 (fr)
WO (1) WO2006114199A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2445572B8 (en) * 2007-01-15 2012-03-28 Eugene H C Leung Intelligent bi-stable structure system.
DE202013100677U1 (de) 2013-02-14 2014-05-21 GITEC Grosse Internationale Technologie GmbH Stellvorrichtung
CN104032439A (zh) * 2014-05-26 2014-09-10 苏州潮盛印花制版实业有限公司 一种电磁经线调节装置
CN104088058A (zh) * 2014-07-08 2014-10-08 太平洋机电(集团)有限公司 一种气缸提升综杆的圆织机提花机构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4335620A1 (de) 1993-10-19 1995-04-20 Grosse Webereimaschinen Gmbh Jaquardmaschine
DE29618765U1 (de) * 1996-10-28 1996-12-12 Grosse Webereimaschinen GmbH, 89233 Neu-Ulm Endseitig in einer Halterung aufgenommener elastisch verformbarer Stab
BE1011710A3 (nl) * 1998-01-19 1999-12-07 Wiele Michel Nv Van De Gaapvormingsinrichting voor weefmachines.
DE202004015676U1 (de) * 2003-09-20 2005-05-04 Piegeler, Gerhard Koppelungsvorrichtungen und HFA-und FA-Elemente für die Textiltechnik

Also Published As

Publication number Publication date
ATE550465T1 (de) 2012-04-15
KR20080004616A (ko) 2008-01-09
CN101184875A (zh) 2008-05-21
DE102005019102A1 (de) 2006-10-26
CN101184875B (zh) 2010-12-08
WO2006114199A1 (fr) 2006-11-02
EP1874987A1 (fr) 2008-01-09

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