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EP1747312B1 - Mechanism for forming a shed and a loom provided with said shed - Google Patents

Mechanism for forming a shed and a loom provided with said shed Download PDF

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Publication number
EP1747312B1
EP1747312B1 EP05769784A EP05769784A EP1747312B1 EP 1747312 B1 EP1747312 B1 EP 1747312B1 EP 05769784 A EP05769784 A EP 05769784A EP 05769784 A EP05769784 A EP 05769784A EP 1747312 B1 EP1747312 B1 EP 1747312B1
Authority
EP
European Patent Office
Prior art keywords
tubular portion
sheath
shank
rod
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.)
Expired - Lifetime
Application number
EP05769784A
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German (de)
French (fr)
Other versions
EP1747312A1 (en
Inventor
André Fumex
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.)
Staubli Faverges SCA
Original Assignee
Staubli Faverges SCA
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 Staubli Faverges SCA filed Critical Staubli Faverges SCA
Publication of EP1747312A1 publication Critical patent/EP1747312A1/en
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/144—Features common to dobbies of different types linking to the heald frame

Definitions

  • the invention relates to a shedding mechanism for a loom. It relates, in particular, pulling mechanisms in which connecting rods are used to transmit to smooth frames a movement generated by dobby or armor mechanics.
  • the invention also relates to a loom equipped with a mechanism of the aforementioned type.
  • a transmission linkage force may comprise a tubular portion in which is engaged a tip provided with a hitch eye to an oscillating lever or a drive arm.
  • rods adjustable in length with a portion carrying an eyelet and forming a rod to be inserted and locked inside.
  • the invention intends to remedy more particularly by proposing a new mechanism for forming the shed whose rod (s) can be easily adjusted in length according to the configuration of the loom, while its Cost price remains economical and that the precision of the length adjustment of the rods and its reliability are in accordance with the requirements of the technical field and allow operation of the loom at high speed.
  • the invention relates to a mechanism for forming the shed for a loom, this mechanism comprising at least one adjustable rod length and / or removable having a first portion provided with a rod adapted to slide in a tubular portion , as well as means for immobilizing this rod in position in this tubular part, characterized in that this rod is equipped with a sleeve whose internal volume forms a housing for receiving and centering the rod relative to the part tubular, this sheath being disposed within this tubular portion and ensuring the holding in position relative to this tubular portion of at least one of the immobilization means of the rod in position in the tubular portion.
  • the sheath which is introduced into the end of the tubular portion of the connecting rod performs several functions, namely centering the rod relative to the tubular portion and positioning one or more means of immobilization, while the tubular portion is smooth and devoid of relief, which greatly facilitates its manufacture.
  • the invention also relates to a loom equipped with a mechanism for forming the crowd as described above.
  • a craft is easier to install and operate than those of the state of the art.
  • the adjustment of the shedding mechanism is facilitated.
  • a dobby 1 is intended to drive several heald frames of a loom M, a single heddle frame being shown with the reference 2.
  • the frame 2 is driven with an oscillating vertical movement F 1 .
  • an actuating arm 1a of the dobby 1 is coupled, by a rod 3 oriented obliquely, to a first oscillating lever 4 itself connected by a connecting rod 3 'to a second oscillating lever 4'.
  • the two levers 4 and 4 ' are articulated respectively about axes 5 and 5' fixed relative to the frame 6 of the loom.
  • the levers 4 and 4 ' are each connected to the frame 2 by connecting rods 3 ".
  • a 3 "connecting rod is shown on the Figures 2 to 4 and comprises a tubular portion 31 intended to receive in its internal volume V 31 a rod 32 belonging to an elongated piece 33 which defines a hitch eyelet 34 to the frame 2.
  • the portion 31 defines a coupling eye 35 of hitch the rod 3 on the lever 4.
  • the 3 "connecting rod is adjustable in length and removable.
  • a sheath 40 is intended to be introduced into the end zone V '31 of the volume V 31 , that is to say the portion of this volume closest to the end 36 of the portion 31 opposite to the eyelet 35, end through which the rod 32 enters the volume V 31 .
  • the sheath 40 is made by injection of synthetic material, especially polyamide or polyacetal, and thus has a certain elasticity.
  • This sleeve is monobloc and its main body 41 defines an elongate and through opening whose transverse dimensions are adapted to the cross section of the rod 32 and allow the guide play reduced in translation of the rod during its introduction into this opening, then that the sleeve 40 is mounted in the portion 31.
  • the internal volume V 41 of the central opening of the body 41 constitutes a housing for receiving and guiding the rod 32, when it is put in place and after this installation.
  • the sleeve 40 is also provided with a flange 42 intended to bear against the end 36 of the portion 31 in order to limit the movement of insertion of the sleeve 40 into the volume V 31 , in the direction of the arrow F 2 .
  • the portion 31 is generally rectangular in cross section and 311 and 312 are its long sides, 313 and 314 its short sides.
  • the transverse dimensions of the sheath 40 are provided to allow a centering of this sheath by pressing against the inner surface 37 of the portion 31.
  • the sheath 40 is equipped with two elastically deformable tabs 43 and 44 in one piece with the body 41 and provided to bear respectively against the short sides 313 and 314, which makes it possible to maintain overall parallel the central axis X 41 of the housing V 41 with the longitudinal axis X 31 -X '31 of the portion 31.
  • the width l 40 of the sleeve 40 is substantially equal to the distance d 31 between the long sides 311 and 312, so that the sleeve is held laterally in support against the internal faces of these sides when introduced into the part 31.
  • the precise adjustment in width of the sleeve 40 in the volume V 31 is obtained thanks to four oblique corners with respect to the axis X 41 , diverging towards the flange 42 and distributed in pairs on the lateral faces of the body 41 and two of which are visible with the reference 47 on the lateral face 41a of the body 41 turned towards the observer at the figure 4 .
  • the sleeve 40 is also provided with two openings 45 and 46 intended to be respectively turned towards the short sides 313 and 314 when the sleeve 40 is in place in the portion 31.
  • a stirrup 50 is attached to the sleeve 40 and comprises a first leg 51 intended to bear on the outside of the side 313 when the sleeve is in place in the portion 31.
  • the stirrup 50 also comprises a second leg 52 which is extends generally in a direction parallel to the X axis 41 and ends with a return 53 generally perpendicular to the branch 52.
  • its branch 52 extends at the opening 45 and his return 53 is directed to the side 313.
  • a rectangular nut 60 is disposed between the leg 52 and the side 313 and receives the rod 61 of a screw 62 which passes through a bore 38 formed in the side 313.
  • the screwing of the screw 62 in the tapping 63 of the nut 60 makes it possible to control the position of this screw in a direction YY 'perpendicular to the axis XX' and parallel to the sides 311 and 312.
  • This makes it possible to exercise on the branch 52 a thrust force F 3 directed towards the side 314, this force being transmitted to the rod 32 when engaged in the volume V 41 .
  • a bar 70 is disposed at the level of the opening 46 and 71 its face facing the volume V 41 and 72 its face facing the side 314.
  • the faces 71 and 72 are parallel and provided with teeth 71a respectively 72a, whose hardness is greater than the surface hardness of the surface 37, at least at the region of the side 314 closest to the end 36, on the one hand, and the surface of the rod 32, 'somewhere else.
  • the teeth of the teeth 71a and 72a extend in a direction AA 'perpendicular to the axis X 31 -X' 31 and the direction YY '.
  • the bar 70 is provided with two heels 73 by which it can bear against heels 48 and 49 formed by the sheath 40, so that the bar 70 can not pass through the opening 46, even though its surface 71 is exposed through the opening 46 and towards the volume V 41 in the configuration of the figure 3 , which allows it to receive support rod 32 under the effect of the effort F 3 .
  • the volume V 41 constitutes a receiving housing of the rod 32, while the elements 50, 60, 62 and 70 make it possible to exert on this rod the immobilization force F 3 exerted in the direction Y-Y ' .
  • the tabs 43 and 44 and the corners 47 make it possible to center the sheath 40 in the volume V 31 . They can deform elastically to account for a possible misalignment of the central axis X 32 -X '32 of the rod 32 with the axis X 31 -X' 31 .
  • the length L 41 of the opening of the body 41 is sufficient to guide and effectively support the rod 32 both during its insertion movement in the direction of the arrow F 4 and when it is immobilized by the force F 3 . In practice, this length L 41 is at least greater than the largest dimension of the nut 60 or the bar 70.
  • the assembly and the length adjustment of the rod 3 "take place by partially inserting the bar 70 in the opening 46 on the one hand, while the stirrup 50 is hooked on the sleeve 40 and the nut 60 is in position. support on the branch 52.
  • the elements 50 and 60 are held in position by the attachment of the branch 51 on the sheath 40.
  • the bar 70 is not likely to migrate to the volume V 41 because it is retained by the cooperation of Parts 48, 49 and 73.
  • the sleeve 40 thus equipped is introduced into the part 31, in the direction of the arrow F 2.
  • the screw 62 is brought into engagement with the tapping 63, which makes the elements 40 captive. , 50, 60 and 70.
  • the rod 32 is inserted into the sheath 40 and the portion 31 in the direction of the arrow F 4 to obtain the desired length for the rod 3 "whose screw 62 is then tightened to exert the effort F 3 of immobilization.
  • the screw 62 By loosening the screw 62 it is possible to subsequently change the length of the connecting rod or disassemble.
  • the tubular portion 31 is particularly simple to produce, so economical.
  • the other rods 3 and 3 'of the trade M may be provided according to the same principle as the rods 3. As a variant, some of these rods may not be adjustable in length or removable.
  • the invention is not limited to positive dobby but applies to negative dobby looms, with rods located above the frames, and to cam mechanics looms.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The inventive mechanism for forming a loom comprises at least one length-adjustable and/or removable rod (3'') which is provided with a first part (33) comprising a pin (32) sliding in a tubular part (31) and means (50, 60, 62, 70) for locking said pin (32) in operating position in the tubular part (31). The inventive rod is provided with a sheath (40) whose internal volume (V41) forms a housing for receiving and centring the pin (32) with respect to the tubular part (31). Said sheath is arranged inside the tubular part (31) and holds at least one locking means (50, 70) in operating position with respect to the tubular part (31).

Description

L'invention a trait à un mécanisme de formation de la foule pour un métier à tisser. Elle concerne, notamment, les mécanismes de tirage dans lesquels des bielles sont utilisées pour transmettre à des cadres de lisse un mouvement généré par une ratière ou une mécanique d'armure. L'invention concerne également un métier à tisser équipé d'un mécanisme du type précité.The invention relates to a shedding mechanism for a loom. It relates, in particular, pulling mechanisms in which connecting rods are used to transmit to smooth frames a movement generated by dobby or armor mechanics. The invention also relates to a loom equipped with a mechanism of the aforementioned type.

Dans le domaine de formation de la foule sur les métiers à tisser, il est connu d'utiliser des bielles qui assurent l'accouplement des organes mobiles d'actionnement avec des cadres de lisses à déplacement vertical montés sur le métier. Il est connu, par exemple de FR-A-2 836 488 , qu'une bielle de transmission d'effort peut comprendre une partie tubulaire dans laquelle est engagé un embout pourvu d'un oeillet d'attelage à un levier oscillant ou un bras d'entraînement. Pour tenir compte des nombreuses configurations d'installation des mécanismes de formation de la foule, il est par ailleurs connu de prévoir des bielles réglables en longueur, avec une partie portant un oeillet et formant une tige destinée à être introduite et verrouillée à l'intérieur d'une partie tubulaire, grâce à une vis coopérant avec un écrou prisonnier dans la partie tubulaire et exerçant sur la tige un effort de pression contre une barrette également disposée dans la tige. Cette approche impose de prévoir des moyens de retenue, à l'intérieur de l'extrémité de la partie tubulaire, à la fois pour l'écrou et pour la barrette de réception de l'effort d'appui. Une telle approche impose également de prévoir des moyens de guidage de la tige pour éviter des déplacements parasites selon une direction transversale perpendiculaire à celle selon laquelle est appliqué l'effort d'immobilisation obtenu grâce à l'écrou. Ces contraintes induisent une construction élaborée pour l'extrémité de la partie tubulaire de la bielle, ce qui augmente son prix de revient sans que la précision obtenue soit, en pratique, satisfaisante. En outre, ces dispositions constructives peuvent gêner l'introduction totale de la tige dans la partie tubulaire, ce qui induit que la longueur minimale de la bielle ne peut pas être diminuée en deçà d'une valeur limite.In the field of training the crowd on the looms, it is known to use connecting rods which mate the movable actuating members with vertical sliding rails mounted on the loom. It is known, for example from FR-A-2,836,488 , that a transmission linkage force may comprise a tubular portion in which is engaged a tip provided with a hitch eye to an oscillating lever or a drive arm. To take into account the numerous configurations of installation of the mechanisms for forming the crowd, it is also known to provide rods adjustable in length, with a portion carrying an eyelet and forming a rod to be inserted and locked inside. of a tubular part, thanks to a screw cooperating with a nut trapped in the tubular part and exerting on the rod a pressure force against a bar also disposed in the rod. This approach requires the provision of retaining means, inside the end of the tubular portion, both for the nut and for the receiving bar of the support force. Such an approach also requires the provision of means for guiding the rod to prevent parasitic displacements in a transverse direction. perpendicular to that which is applied the immobilization force obtained through the nut. These constraints induce an elaborate construction for the end of the tubular part of the connecting rod, which increases its cost price without the accuracy obtained being, in practice, satisfactory. In addition, these constructive arrangements can hinder the total introduction of the rod in the tubular part, which means that the minimum length of the connecting rod can not be reduced below a limit value.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un nouveau mécanisme de formation de la foule dont la ou les bielles peuvent être aisément réglée(s) en longueur selon la configuration du métier à tisser, alors que son prix de revient demeure économique et que la précision de l'ajustement en longueur des bielles et sa fiabilité sont conformes aux exigences du domaine technique et permettent un fonctionnement du métier à tisser à haute vitesse.It is these drawbacks that the invention intends to remedy more particularly by proposing a new mechanism for forming the shed whose rod (s) can be easily adjusted in length according to the configuration of the loom, while its Cost price remains economical and that the precision of the length adjustment of the rods and its reliability are in accordance with the requirements of the technical field and allow operation of the loom at high speed.

Dans cet esprit, l'invention concerne un mécanisme de formation de la foule pour métier à tisser, ce mécanisme comprenant au moins une bielle réglable en longueur et/ou démontable comportant une première partie pourvue d'une tige apte à coulisser dans une partie tubulaire, ainsi que des moyens d'immobilisation de cette tige en position dans cette partie tubulaire, caractérisée en ce que cette bielle est équipée d'un fourreau dont le volume interne forme un logement de réception et de centrage de la tige par rapport à la partie tubulaire, ce fourreau étant disposé à l'intérieur de cette partie tubulaire et assurant le maintien en position par rapport à cette partie tubulaire d'au moins un des moyens d'immobilisation de la tige en position dans la partie tubulaire.In this spirit, the invention relates to a mechanism for forming the shed for a loom, this mechanism comprising at least one adjustable rod length and / or removable having a first portion provided with a rod adapted to slide in a tubular portion , as well as means for immobilizing this rod in position in this tubular part, characterized in that this rod is equipped with a sleeve whose internal volume forms a housing for receiving and centering the rod relative to the part tubular, this sheath being disposed within this tubular portion and ensuring the holding in position relative to this tubular portion of at least one of the immobilization means of the rod in position in the tubular portion.

Grâce à l'invention, le fourreau qui est introduit dans l'extrémité de la partie tubulaire de la bielle assure plusieurs fonctions, à savoir le centrage de la tige par rapport à la partie tubulaire et le positionnement d'un ou de plusieurs moyens d'immobilisation, alors que la partie tubulaire est lisse et dépourvue de reliefs, ce qui facilite grandement sa fabrication.Thanks to the invention, the sheath which is introduced into the end of the tubular portion of the connecting rod performs several functions, namely centering the rod relative to the tubular portion and positioning one or more means of immobilization, while the tubular portion is smooth and devoid of relief, which greatly facilitates its manufacture.

Selon des aspects avantageux mais non obligatoires, un mécanisme de formation de la foule peut incorporer une ou plusieurs des caractéristiques suivantes prises dans toute combinaison techniquement admissible :

  • Le fourreau est au moins en partie élastiquement déformable.
  • Le fourreau porte ou forme au moins un organe de centrage par rapport à la surface intérieure de la partie tubulaire. Cet organe est avantageusement constitué par une patte élastiquement déformable et monobloc avec une partie du fourreau formant le logement précité de réception et de centrage de la tige, cette patte étant prévue pour venir en appui contre la surface intérieure de la partie tubulaire.
  • Le fourreau est réalisé en matière synthétique, de préférence injectée, notamment en matière plastique injectée.
  • Les moyens d'immobilisation précités comprennent une barrette immobilisée par le fourreau dans partie tubulaire, par coopération de formes, cette barrette étant prévue pour recevoir en appui la tige. Dans ce cas, la face de cette barrette destinée à recevoir la tige en appui ainsi que la face de cette barrette tournée vers la surface intérieure de la partie tubulaire sont pourvues de reliefs destinés à augmenter l'adhérence entre cette barrette et la tige, d'une part, et la partie tubulaire, d'autre part. Ces reliefs comprennent, de préférence, des dentures dont les dents s'étendent selon une direction globalement transversale par rapport à un axe longitudinal de la partie tubulaire. En variante, ces reliefs peuvent être des pointes, des rainures croisées, un moletage ou autre. On peut en outre prévoir que la dureté de ces reliefs est supérieure à la dureté de surface de la tige et/ou de la partie tubulaire, au moins au niveau des zones de ces tige et partie tubulaire qui sont destinées à être en contact avec ces reliefs. Cet aspect de l'invention permet d'augmenter le coefficient de frottement entre la barrette et la tige et/ou entre la barrette et la partie tubulaire par micro-incrustation des reliefs dans les surfaces de la tige et de la partie tubulaire. On peut ainsi transmettre de fortes charges au moyen du mécanisme de l'invention.
  • Les moyens d'immobilisation comprennent un étrier monté sur le fourreau et/ou la partie tubulaire, ainsi qu'une vis apte à exercer sur l'étrier, à travers une ouverture ménagée dans le fourreau, un effort de blocage de la tige, cet effort étant dirigé selon une direction globalement transversale par rapport à un axe longitudinal de la partie tubulaire.
According to advantageous but non-mandatory aspects, a shedding mechanism may incorporate one or more of the following features taken in any technically permissible combination:
  • The sheath is at least partially elastically deformable.
  • The sleeve carries or forms at least one centering member with respect to the inner surface of the tubular portion. This member is advantageously constituted by an elastically deformable and monobloc tab with a portion of the sleeve forming the aforementioned housing for receiving and centering the rod, this tab being provided to abut against the inner surface of the tubular portion.
  • The sleeve is made of synthetic material, preferably injected, in particular injected plastic material.
  • The aforementioned immobilization means comprise a bar immobilized by the sleeve in the tubular portion, by cooperation of shapes, this bar being provided to receive bearing the rod. In this case, the face of this bar intended to receive the rod in support and the face of this bar facing the inner surface of the tubular portion are provided with reliefs intended to increase the adhesion between this bar and the rod, d on the one hand, and the tubular part, on the other. These reliefs preferably include teeth whose teeth extend in a direction generally transverse to a longitudinal axis of the tubular portion. Alternatively, these reliefs may be spikes, cross grooves, knurling or other. It can further be provided that the hardness of these reliefs is greater than the surface hardness of the rod and / or the tubular portion, at least at the regions of these rod and tubular portion which are intended to be in contact with these landforms. This aspect of the invention makes it possible to increase the coefficient of friction between the bar and the rod and / or between the bar and the tubular part by micro-incrustation of the reliefs in the surfaces of the rod and the tubular part. It is thus possible to transmit heavy loads by means of the mechanism of the invention.
  • The immobilization means comprise a stirrup mounted on the sleeve and / or the tubular part, and a screw adapted to exert on the stirrup, through an opening in the sleeve, a locking force of the rod, this force being directed in a direction generally transverse to a longitudinal axis of the tubular portion.

L'invention concerne également un métier à tisser équipé d'un mécanisme de formation de la foule tel que décrit ci-dessus. Un tel métier est plus facile à installer et à faire fonctionner que ceux de l'état de la technique. En particulier, le réglage du mécanisme de formation de la foule est facilité.The invention also relates to a loom equipped with a mechanism for forming the crowd as described above. Such a craft is easier to install and operate than those of the state of the art. In particular, the adjustment of the shedding mechanism is facilitated.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un mécanisme conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une représentation schématique de principe d'un métier à tisser conforme à l'invention ;
  • la figure 2 est une coupe longitudinale de principe d'une des bielles du métier de la figure 1 ;
  • la figure 3 est une vue analogue à la figure 2 et représente la bielle en cours de montage ;
  • la figure 4 est une vue en perspective éclatée d'une partie de la bielle des figures 2 et 3.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a mechanism according to its principle, given solely by way of example and with reference to the accompanying drawings in which:
  • the figure 1 is a schematic representation of a weaving machine according to the invention;
  • the figure 2 is a longitudinal section of principle of one of the rods of the trade of the figure 1 ;
  • the figure 3 is a view similar to the figure 2 and represents the rod being assembled;
  • the figure 4 is an exploded perspective view of part of the connecting rod of Figures 2 and 3 .

A la figure 1, une ratière 1 est destinée à entraîner plusieurs cadres de lisses d'un métier à tisser M, un seul cadre de lisses étant représenté avec la référence 2. Le cadre 2 est entraîné avec un mouvement vertical oscillant F1. Pour ce faire, un bras d'actionnement 1a de la ratière 1 est attelé, par une bielle 3 orientée obliquement, à un premier levier oscillant 4 lui-même relié par une bielle 3' à un second levier oscillant 4'. Les deux leviers 4 et 4' sont articulés respectivement autour d'axes 5 et 5' fixes par rapport au bâti 6 du métier. Les leviers 4 et 4' sont chacun reliés au cadre 2 par des bielles 3".To the figure 1 , a dobby 1 is intended to drive several heald frames of a loom M, a single heddle frame being shown with the reference 2. The frame 2 is driven with an oscillating vertical movement F 1 . To do this, an actuating arm 1a of the dobby 1 is coupled, by a rod 3 oriented obliquely, to a first oscillating lever 4 itself connected by a connecting rod 3 'to a second oscillating lever 4'. The two levers 4 and 4 'are articulated respectively about axes 5 and 5' fixed relative to the frame 6 of the loom. The levers 4 and 4 'are each connected to the frame 2 by connecting rods 3 ".

Il est prévu autant de bras 1a et d'ensembles de bielles 3, 3' et 3" et de leviers 4 et 4' que de cadres de lisses à entraîner.There are provided as many arms 1a and sets of connecting rods 3, 3 'and 3 "and levers 4 and 4' as smooth frames to train.

Une bielle 3" est représentée sur les figures 2 à 4 et comprend une partie tubulaire 31 destinée à recevoir dans son volume intérieur V31 une tige 32 appartenant à une pièce allongée 33 qui définit un oeillet 34 d'attelage au cadre 2. La partie 31 définit quant à elle un oeillet 35 d'attelage de la bielle 3 sur le levier 4.A 3 "connecting rod is shown on the Figures 2 to 4 and comprises a tubular portion 31 intended to receive in its internal volume V 31 a rod 32 belonging to an elongated piece 33 which defines a hitch eyelet 34 to the frame 2. The portion 31 defines a coupling eye 35 of hitch the rod 3 on the lever 4.

La bielle 3" est réglable en longueur et démontable.The 3 "connecting rod is adjustable in length and removable.

Un fourreau 40 est destiné à être introduit dans la zone d'extrémité V'31 du volume V31, c'est-à-dire la partie de ce volume la plus proche de l'extrémité 36 de la partie 31 opposée à l'oeillet 35, extrémité par laquelle la tige 32 pénètre dans le volume V31.A sheath 40 is intended to be introduced into the end zone V '31 of the volume V 31 , that is to say the portion of this volume closest to the end 36 of the portion 31 opposite to the eyelet 35, end through which the rod 32 enters the volume V 31 .

Le fourreau 40 est réalisé par injection de matériau synthétique, notamment de polyamide ou de polyacétal, et présente de ce fait une certaine élasticité. Ce fourreau est monobloc et son corps principal 41 définit une ouverture allongée et traversante dont les dimensions transversales sont adaptées à la section transversale de la tige 32 et permettent le guidage à jeu réduit en translation de cette tige lors de son introduction dans cette ouverture, alors que le fourreau 40 est monté dans la partie 31.The sheath 40 is made by injection of synthetic material, especially polyamide or polyacetal, and thus has a certain elasticity. This sleeve is monobloc and its main body 41 defines an elongate and through opening whose transverse dimensions are adapted to the cross section of the rod 32 and allow the guide play reduced in translation of the rod during its introduction into this opening, then that the sleeve 40 is mounted in the portion 31.

Le volume interne V41 de l'ouverture centrale du corps 41 constitue un logement de réception et de guidage de la tige 32, lors de sa mise en place et postérieurement à cette mise en place.The internal volume V 41 of the central opening of the body 41 constitutes a housing for receiving and guiding the rod 32, when it is put in place and after this installation.

Le fourreau 40 est également pourvu d'une collerette 42 destinée à venir en appui contre l'extrémité 36 de la partie 31 afin de limiter le mouvement d'introduction du fourreau 40 dans le volume V31, dans le sens de la flèche F2.The sleeve 40 is also provided with a flange 42 intended to bear against the end 36 of the portion 31 in order to limit the movement of insertion of the sleeve 40 into the volume V 31 , in the direction of the arrow F 2 .

La partie 31 est à section transversale globalement rectangulaire et l'on note 311 et 312 ses grands côtés, 313 et 314 ses petits côtés. Les dimensions transversales du fourreau 40 sont prévues pour permettre un centrage de ce fourreau par appui contre la surface interne 37 de la partie 31. Pour ce faire, le fourreau 40 est équipé de deux pattes élastiquement déformables 43 et 44 monoblocs avec le corps 41 et prévues pour venir respectivement en appui contre les petits côtés 313 et 314, ce qui permet de conserver globalement parallèle l'axe médian X41 du logement V41 avec l'axe longitudinal X31-X'31 de la partie 31.The portion 31 is generally rectangular in cross section and 311 and 312 are its long sides, 313 and 314 its short sides. The transverse dimensions of the sheath 40 are provided to allow a centering of this sheath by pressing against the inner surface 37 of the portion 31. To do this, the sheath 40 is equipped with two elastically deformable tabs 43 and 44 in one piece with the body 41 and provided to bear respectively against the short sides 313 and 314, which makes it possible to maintain overall parallel the central axis X 41 of the housing V 41 with the longitudinal axis X 31 -X '31 of the portion 31.

La largeur l40 du fourreau 40 est sensiblement égale à la distance d31 entre les grands côtés 311 et 312, de telle sorte que le fourreau est maintenu latéralement en appui contre les faces internes de ces côtés lorsqu'il est introduit dans la partie 31.The width l 40 of the sleeve 40 is substantially equal to the distance d 31 between the long sides 311 and 312, so that the sleeve is held laterally in support against the internal faces of these sides when introduced into the part 31.

L'ajustement précis en largeur du fourreau 40 dans le volume V31 est obtenu grâce à quatre coins obliques par rapport à l'axe X41, divergents vers la collerette 42 et répartis deux par deux sur les faces latérales du corps 41 et dont deux sont visibles avec la référence 47 sur la face latérale 41a du corps 41 tournée vers l'observateur à la figure 4.The precise adjustment in width of the sleeve 40 in the volume V 31 is obtained thanks to four oblique corners with respect to the axis X 41 , diverging towards the flange 42 and distributed in pairs on the lateral faces of the body 41 and two of which are visible with the reference 47 on the lateral face 41a of the body 41 turned towards the observer at the figure 4 .

Le fourreau 40 est également pourvu de deux ouvertures 45 et 46 destinée à être respectivement tournées vers les petits côtés 313 et 314 lorsque le fourreau 40 est en place dans la partie 31.The sleeve 40 is also provided with two openings 45 and 46 intended to be respectively turned towards the short sides 313 and 314 when the sleeve 40 is in place in the portion 31.

Un étrier 50 est rapporté sur le fourreau 40 et comprend une première branche 51 destinée à venir en appui sur l'extérieur du côté 313 lorsque le fourreau est en place dans la partie 31. L'étrier 50 comprend également une seconde branche 52 qui s'étend globalement selon une direction parallèle à l'axe X41 et se termine par un retour 53 globalement perpendiculaire à la branche 52. Lorsque l'étrier 50 est en place, sa branche 52 s'étend au niveau de l'ouverture 45 et son retour 53 est dirigé vers le côté 313.A stirrup 50 is attached to the sleeve 40 and comprises a first leg 51 intended to bear on the outside of the side 313 when the sleeve is in place in the portion 31. The stirrup 50 also comprises a second leg 52 which is extends generally in a direction parallel to the X axis 41 and ends with a return 53 generally perpendicular to the branch 52. When the yoke 50 is in place, its branch 52 extends at the opening 45 and his return 53 is directed to the side 313.

Un écrou rectangulaire 60 est disposé entre la branche 52 et le côté 313 et reçoit la tige 61 d'une vis 62 qui traverse un perçage 38 ménagé dans le côté 313.A rectangular nut 60 is disposed between the leg 52 and the side 313 and receives the rod 61 of a screw 62 which passes through a bore 38 formed in the side 313.

Ainsi, le vissage de la vis 62 dans le taraudage 63 de l'écrou 60 permet de contrôler la position de cette vis selon une direction Y-Y' perpendiculaire à l'axe X-X' et parallèle aux côtés 311 et 312. Ceci permet d'exercer sur la branche 52 un effort de poussée F3 dirigé vers le côté 314, cet effort étant transmis à la tige 32 lorsqu'elle est engagée dans le volume V41.Thus, the screwing of the screw 62 in the tapping 63 of the nut 60 makes it possible to control the position of this screw in a direction YY 'perpendicular to the axis XX' and parallel to the sides 311 and 312. This makes it possible to exercise on the branch 52 a thrust force F 3 directed towards the side 314, this force being transmitted to the rod 32 when engaged in the volume V 41 .

Une barrette 70 est disposée au niveau de l'ouverture 46 et l'on note 71 sa face orientée vers le volume V41 et 72 sa face orientée vers le côté 314. Les faces 71 et 72 sont parallèles et pourvues de dentures 71a, respectivement 72a, dont la dureté est supérieure à la dureté superficielle de la surface 37, au moins au niveau de la zone du côté 314 la plus proche de l'extrémité 36, d'une part, et de la surface de la tige 32, d'autre part.A bar 70 is disposed at the level of the opening 46 and 71 its face facing the volume V 41 and 72 its face facing the side 314. The faces 71 and 72 are parallel and provided with teeth 71a respectively 72a, whose hardness is greater than the surface hardness of the surface 37, at least at the region of the side 314 closest to the end 36, on the one hand, and the surface of the rod 32, 'somewhere else.

Les dents des dentures 71a et 72a s'étendent selon une direction A-A' perpendiculaire à l'axe X31-X'31 et à la direction Y-Y'.The teeth of the teeth 71a and 72a extend in a direction AA 'perpendicular to the axis X 31 -X' 31 and the direction YY '.

La barrette 70 est pourvue de deux talons 73 par lesquels elle peut venir en appui contre des talons 48 et 49 formés par le fourreau 40, de telle sorte que la barrette 70 ne peut pas passer à travers l'ouverture 46, alors même que sa surface 71 est exposée à travers l'ouverture 46 et en direction du volume V41 dans la configuration de la figure 3, ce qui lui permet de recevoir en appui la tige 32 sous l'effet de l'effort F3.The bar 70 is provided with two heels 73 by which it can bear against heels 48 and 49 formed by the sheath 40, so that the bar 70 can not pass through the opening 46, even though its surface 71 is exposed through the opening 46 and towards the volume V 41 in the configuration of the figure 3 , which allows it to receive support rod 32 under the effect of the effort F 3 .

Ainsi, le volume V41 constitue un logement de réception de la tige 32, alors que les éléments 50, 60, 62 et 70 permettent d'exercer sur cette tige l'effort d'immobilisation F3 exercé selon la direction Y-Y'.Thus, the volume V 41 constitutes a receiving housing of the rod 32, while the elements 50, 60, 62 and 70 make it possible to exert on this rod the immobilization force F 3 exerted in the direction Y-Y ' .

Sous l'effet de l'effort F3, la tige 32 est fermement plaquée contre la denture 71a de la barrette 70, alors que la denture 72a est fermement plaquée contre le côté 314 de la partie 31. Compte tenu des duretés relatives de ces dentures par rapport aux duretés superficielles des pièces 31 et 32, il se produit des micro-incrustations des dents des dentures dans les parties en regard, ce qui permet d'augmenter sensiblement le coefficient de frottement entre les pièces 32 et 70, d'une part, 70 et 31, d'autre part, selon la direction longitudinale des pièces 31 et 32 et ce, d'autant plus que la direction A-A' est perpendiculaire à l'axe X31- X'31. On peut cependant obtenir de bons résultats en remplaçant les dentures 71a et/ou 72a par des dentures obliques ou croisées, par un moletage ou par des pointes.Under the effect of the force F 3 , the rod 32 is firmly pressed against the toothing 71a of the bar 70, while the toothing 72a is firmly pressed against the side 314 of the portion 31. Given the relative hardness of these toothings compared to the surface hardnesses of the parts 31 and 32, micro-incrustations of the teeth of the teeth in the facing parts occur, which makes it possible to increase substantially the coefficient of friction between the pieces 32 and 70, of a part, 70 and 31, on the other hand, in the longitudinal direction of parts 31 and 32, and this, especially since the direction AA 'is perpendicular to the X axis 31 - X '31 . However, good results can be obtained by replacing the teeth 71a and / or 72a by oblique or crossed toothings, by knurling or by spikes.

Les pattes 43 et 44 et les coins 47 permettent de centrer le fourreau 40 dans le volume V31. Ils peuvent se déformer élastiquement pour tenir compte d'un éventuel défaut d'alignement de l'axe central X32-X'32 de la tige 32 avec l'axe X31-X'31.The tabs 43 and 44 and the corners 47 make it possible to center the sheath 40 in the volume V 31 . They can deform elastically to account for a possible misalignment of the central axis X 32 -X '32 of the rod 32 with the axis X 31 -X' 31 .

La longueur L41 de l'ouverture du corps 41 est suffisante pour guider et soutenir efficacement la tige 32 à la fois lors de son mouvement d'introduction dans le sens de la flèche F4 et lorsqu'elle est immobilisée par l'effort F3. En pratique, cette longueur L41 est au moins supérieure à la plus grande dimension de l'écrou 60 ou de la barrette 70.The length L 41 of the opening of the body 41 is sufficient to guide and effectively support the rod 32 both during its insertion movement in the direction of the arrow F 4 and when it is immobilized by the force F 3 . In practice, this length L 41 is at least greater than the largest dimension of the nut 60 or the bar 70.

Le montage et le réglage en longueur de la bielle 3" ont lieu en insérant partiellement la barrette 70 dans l'ouverture 46 d'une part, alors que l'étrier 50 est accroché sur le fourreau 40 et que l'écrou 60 est en appui sur la branche 52. Les éléments 50 et 60 sont maintenus en position grâce à l'accrochage de la branche 51 sur le fourreau 40. La barrette 70 ne risque pas de migrer vers le volume V41 car elle est retenue par la coopération des parties 48, 49 et 73. Ensuite, le fourreau 40 ainsi équipé est introduit dans la partie 31, dans le sens de la flèche F2. Puis la vis 62 est amenée en prise avec le taraudage 63, ce qui rend imperdable les éléments 40, 50, 60 et 70. Ensuite, la tige 32 est introduite dans le fourreau 40 et la partie 31 dans le sens de la flèche F4 jusqu'à obtenir la longueur désirée pour la bielle 3" dont la vis 62 est alors serrée pour exercer l'effort F3 d'immobilisation. En desserrant la vis 62 il est possible de modifier ultérieurement la longueur de la bielle ou de la démonter.The assembly and the length adjustment of the rod 3 "take place by partially inserting the bar 70 in the opening 46 on the one hand, while the stirrup 50 is hooked on the sleeve 40 and the nut 60 is in position. support on the branch 52. The elements 50 and 60 are held in position by the attachment of the branch 51 on the sheath 40. The bar 70 is not likely to migrate to the volume V 41 because it is retained by the cooperation of Parts 48, 49 and 73. Then, the sleeve 40 thus equipped is introduced into the part 31, in the direction of the arrow F 2. Then the screw 62 is brought into engagement with the tapping 63, which makes the elements 40 captive. , 50, 60 and 70. Then, the rod 32 is inserted into the sheath 40 and the portion 31 in the direction of the arrow F 4 to obtain the desired length for the rod 3 "whose screw 62 is then tightened to exert the effort F 3 of immobilization. By loosening the screw 62 it is possible to subsequently change the length of the connecting rod or disassemble.

La partie tubulaire 31 est particulièrement simple à réaliser, donc économique.The tubular portion 31 is particularly simple to produce, so economical.

Les autres bielles 3 et 3' du métier M peuvent êtres prévues selon le même principe que les bielles 3". En variante, certaines de ces bielles peuvent ne pas être réglables en longueur ou démontable.The other rods 3 and 3 'of the trade M may be provided according to the same principle as the rods 3. As a variant, some of these rods may not be adjustable in length or removable.

L'invention n'est pas limitée aux métiers à ratière positive mais s'applique aux métiers à ratière négative, avec des bielles situées au-dessus des cadres, et au métiers à mécanique à cames.The invention is not limited to positive dobby but applies to negative dobby looms, with rods located above the frames, and to cam mechanics looms.

Claims (10)

  1. A shed-forming mechanism for a loom, said mechanism comprising at least one connecting rod that is adjustable in length and/or removable, comprising a first portion provided with a shank suitable for sliding in a tubular portion, and retention means for retaining said shank in position in said tubular portion, characterized in that said connecting rod (3) is fitted with a sheath (40) having an internal volume (V41) that forms a housing for receiving and centering said rod (32) relative to said tubular portion (31), said sheath being placed inside said tubular portion and serving to hold, in position relative to said tubular portion, at least one (50, 60, 70) of said retention means.
  2. A mechanism according to claim 1, characterized in that said sheath (40) is elastically deformable, at least in part.
  3. A mechanism according to either preceding claim, characterized in that said sheath (40) carries or forms at least one member (43, 44, 47) for centering said tubular portion (31) relative to the inside surface (37).
  4. A mechanism according to claim 3, characterized in that said member is an elastically deformable tab (43, 44) formed integrally with a portion (41) of said sheath forming said housing (V41), said tab being designed to bear against said inside surface (37).
  5. A mechanism according to any preceding claim, characterized in that said sheath (40) is made of synthetic material, preferably by injection molding.
  6. A mechanism according to any preceding claim, characterized in that said retention means comprise a strip (70) retained by said sheath (40) in said tubular portion (31) by co-operating shapes (48, 49, 73), said strip being designed to receive said shank (32) bearing thereagainst.
  7. A mechanism according to claim 6, characterized in that the face (71) of said strip (70) that is to receive said shank (32) bearing thereagainst, and/or the face (72) of said strip facing towards the inside surface (37) of said tubular portion (31) is/are provided with portions in relief (71a, 72a) for increasing adhesion between said strip and said shank and/or said tubular portion.
  8. A mechanism according to claim 7, characterized in that the hardness of said portions in relief (71a, 72a) is greater than the surface hardness of said shank (32) and of said tubular portion (31), at least in the zones of said shank and/or said tubular portion that are designed to come into contact with said portions in relief.
  9. A mechanism according to any preceding claim, characterized in that said retention means comprise a clamp (50) mounted on said sheath (40) and/or said tubular portion (31), together with a screw (62) suitable for exerting a force (F3) on said clamp and through an opening (45) formed in said sheath, said force (F3) serving to block said shank and being directed along a direction (Y-Y') that extends generally transversely relative to a longitudinal axis (X31-X'31) of said tubular portion.
  10. A loom (M) fitted with a shed-forming mechanism (1-70) according to any preceding claim.
EP05769784A 2004-05-06 2005-05-04 Mechanism for forming a shed and a loom provided with said shed Expired - Lifetime EP1747312B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0404896A FR2869920B1 (en) 2004-05-06 2004-05-06 CROWN TRAINING MECHANISM AND WEAVING EQUIPPED WITH SUCH A MECHANISM
PCT/FR2005/001126 WO2005121423A1 (en) 2004-05-06 2005-05-04 Mechanism for forming a shed and a loom provided with said shed

Publications (2)

Publication Number Publication Date
EP1747312A1 EP1747312A1 (en) 2007-01-31
EP1747312B1 true EP1747312B1 (en) 2010-12-29

Family

ID=34945295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05769784A Expired - Lifetime EP1747312B1 (en) 2004-05-06 2005-05-04 Mechanism for forming a shed and a loom provided with said shed

Country Status (8)

Country Link
EP (1) EP1747312B1 (en)
JP (1) JP5044391B2 (en)
KR (1) KR101190721B1 (en)
CN (1) CN1950553B (en)
DE (1) DE602005025621D1 (en)
FR (1) FR2869920B1 (en)
RU (1) RU2363781C2 (en)
WO (1) WO2005121423A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062367A1 (en) * 2004-12-13 2006-06-22 Picanol N.V. transmission rod
FR3002546B1 (en) * 2013-02-25 2015-08-14 Staubli Sa Ets BELT BELONGING TO A WEAVING AND WEAVING BUSINESS INCLUDING THIS ROD
EP2998421B1 (en) * 2014-09-16 2020-04-08 Groz-Beckert KG Heald frame coupling and heald frame with the same
CN112771217B (en) * 2018-06-29 2023-01-03 必佳乐公司 Connecting rod for a drive mechanism of a heald frame

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH523989A (en) * 1970-09-25 1972-06-15 Staeubli Ag Adjustment device in the connection path between a shedding device and a shaft or a stranded wire
CH621159A5 (en) * 1977-07-20 1981-01-15 Staeubli Ag
DE3234685C1 (en) * 1982-09-18 1983-11-03 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Clamping device
IT1258971B (en) * 1992-06-11 1996-03-11 Costantino Vinciguerra ADJUSTABLE CONNECTION TIE-ROD BETWEEN THE DOBBY AND THE SQUARE LEVERS OF THE PANEL CONTROL PANEL OF A TEXTILE FRAME
CN2216533Y (en) * 1994-03-16 1996-01-03 吴敏书 Drive for two side dobby lifter
FR2776307B1 (en) * 1998-03-19 2000-06-23 Staubli Sa Ets DRAWING MECHANISM FOR ARMOR AND WEAVING MECHANISM COMPRISING SUCH A DRAWING MECHANISM
FR2836488B1 (en) * 2002-02-28 2004-06-04 Staubli Sa Ets DRAWING MECHANISM, MANUFACTURING METHOD THEREOF AND WEAVING MACHINE COMPRISING SUCH A MECHANISM

Also Published As

Publication number Publication date
CN1950553B (en) 2010-05-26
RU2006143055A (en) 2008-06-20
JP5044391B2 (en) 2012-10-10
FR2869920B1 (en) 2006-06-09
KR20070007903A (en) 2007-01-16
FR2869920A1 (en) 2005-11-11
EP1747312A1 (en) 2007-01-31
DE602005025621D1 (en) 2011-02-10
WO2005121423A1 (en) 2005-12-22
RU2363781C2 (en) 2009-08-10
KR101190721B1 (en) 2012-10-12
CN1950553A (en) 2007-04-18
JP2007536442A (en) 2007-12-13

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