EP0768100A1 - Sewn attachment loop for an elastic rope, and method of making it - Google Patents

Sewn attachment loop for an elastic rope, and method of making it Download PDF

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Publication number
EP0768100A1
EP0768100A1 EP96410101A EP96410101A EP0768100A1 EP 0768100 A1 EP0768100 A1 EP 0768100A1 EP 96410101 A EP96410101 A EP 96410101A EP 96410101 A EP96410101 A EP 96410101A EP 0768100 A1 EP0768100 A1 EP 0768100A1
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EP
European Patent Office
Prior art keywords
rope
cord
seam
sewing
loop
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Granted
Application number
EP96410101A
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German (de)
French (fr)
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EP0768100B1 (en
Inventor
Jean Marc Hede
Paul Petzl
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Zedel SAS
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Zedel SAS
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/18—Grommets
    • D07B1/185—Grommets characterised by the eye construction
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B29/00—Apparatus for mountaineering
    • A63B29/02—Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B9/00—Binding or sealing ends, e.g. to prevent unravelling
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1004—General structure or appearance
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2069—Climbing or tents

Definitions

  • the tensioning of an elastic rope causes a significant tensile force F2 at the level of the second extended portion of rope, said effort being greater than that F1 applied to the first portion of shorter rope. Part of the effort is taken up by the friction of the rope on the carabiner between the two portions of rope.
  • the diagram in FIG. 8 illustrates the variation in the elongation as a function of the force, in which the elongation d2 on the second portion of rope is greater than the elongation d1 on the first portion of rope.
  • This difference in elongation of the two portions of rope results in a non-uniform distribution of the mechanical stresses exerted on the stitching points and the connecting strands when the rope is in the stretched state.
  • the breaking strength of such a fastener conventional sewing is limited.
  • a first object of the invention consists in improving the mechanical resistance of a sewn attachment loop for an elastic cord.
  • the attachment loop according to the invention is characterized in that the seam has an asymmetrical structure in the untensioned state, allowing a homogeneous distribution of mechanical stresses in the connecting strands when tensioning the loop in the stretched state.
  • the stitching points located along the first portion of rope extend in the untensioned state of the rope, according to a longitudinal staggering L1 greater than that L2 assigned to the stitching points of the second portion of cord, the variation in the staggering of said sewing points causing a progressive inclination of the connecting strands along the seam.
  • the seam comprises a plurality of series of sewing stitches, each having the same number of sewing stitches, and a lateral spacing which varies from one series to another, the spacing the smallest being located near the loop, and the largest being positioned near the end of the first portion of rope.
  • a second object of the invention relates to the implementation of a method of manufacturing the sewn fastening loop.
  • an attachment loop 10 of an elastic rope 12, in particular of circular section, is formed from a first portion of rope 14 applied and secured against a second portion of rope 16 by a extended seam 18.
  • the first portion of rope 14 constitutes the terminal portion, which is shorter than the second portion of extended rope 16.
  • the elastic cord 12 is provided with a predetermined longitudinal elasticity, and in the event of the appearance of a tensile force, the component F2 of the tensile force exerted on the second portion of prolonged cord 16 is greater than the component F1 to which the shortest first portion of cord 14 is subjected.
  • the seam 18 is produced according to a specific longitudinal configuration making use of a progressive distribution of the seam stitches.
  • the portion of cord 14 comprises sewing stitches 20A, 22A staggered at regular intervals over a longitudinal distance L1.
  • the other portion of cord 16 is provided with the same number of sewing stitches 20B, 22B staggered over a distance L2. In the untensioned state of the cord, the distance L2 is less than the distance L1.
  • Sewing stitches 20A, 22A; 20B, 22B of the seam 18 are joined together by connecting strands 26.30 arranged respectively on the upper face and the lower face of the fastener 10.
  • FIG. 8 illustrates the curves representative of the tensile force as a function of the elongations of the two sections of rope 14, 16, making it possible to obtain the same final length L1 + d1 and L2 + d2 for a force F2 greater than F1.
  • the connecting strands 26, 30 of the seam 18 tilt slightly, but remain parallel to each other. The mechanical resistance to rupture is thus improved, which is particularly advantageous for safety when the attachment loop 10 is used in climbing, in particular on a rope, or a lanyard.
  • the elongation is zero during the manufacture of the seam.
  • the first portion 14 is sewn in the compressed state (F3 negative) and the other portion of cord 16 is sewn effortlessly F0.
  • the force F2 is greater than F1
  • the elongation d3 of the two portions of rope 14,16 is identical. This results in a homogeneous distribution of the stresses in the connecting strands 26, 30 inclined and parallel (FIG. 7).
  • the loop 100 comprises a plurality of series A1, A2, A3 of sewing stitches partially superimposed between the two sections of rope 114,116.
  • the difference in elongation of the two sewn portions is greater the greater the sewn length.
  • the A1 series is the longest for a minimum spacing of the connecting strands.
  • the A2 series is shorter than the A1 series, but has a greater spacing.
  • the third A3 series is shorter than the A2 series, but with a greater gauge. This asymmetry between the stitches of the three superimposed series thus makes it possible to reduce the effective length of the seam.
  • the thread used for sewing 18, 118 is a textile thread based on synthetic fibers, and of great mechanical resistance.
  • the elastic cord 12 is a classic commercial lifeline, used in the field of climbing or work of great heights to absorb energy in the event of a fall.
  • the stitching points on each portion of rope extend along lines parallel to the longitudinal interface 32 of joining of the two portions of rope.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Ropes Or Cables (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The loop is made by two sections (14,16) of line fitted closely together and joined by stitches (18). The stitches pass through the line sections in spirals (20A,22A) and are connected by linking threads (26,30). The stitches, made from synthetic fibres, are positioned asymmetrically when the line is not under tension to give an even distribution of mechanical stresses when the line is tensioned. The spiral stitches in the first section (14) of the line extend for a distance (L1) which is greater than the distance (L2) covered by the stitches in the second section. The linking threads between them are set at a progressively increasing angle along the stitched section.

Description

L'invention est relative à une boucle d'attache cousue pour une corde dynamique ayant une section circulaire et une élasticité longitudinale, ladite boucle comprenant:

  • une première portion de corde appliquée et solidarisée contre une deuxième portion de corde par des moyens de fixation à couture allongée, la longueur de la première portion étant plus courte que la deuxième portion prolongée,
  • une pluralité de spires élémentaires de fil pour constituer ladite couture et comprenant une succession de points de couture réunis entre eux par des brins de liaison.
The invention relates to a sewn attachment loop for a dynamic rope having a circular section and a longitudinal elasticity, said loop comprising:
  • a first portion of rope applied and secured against a second portion of rope by elongated seam fastening means, the length of the first portion being shorter than the second extended portion,
  • a plurality of elementary turns of wire to constitute said seam and comprising a succession of sewing points joined together by connecting strands.

La mise sous tension d'une corde élastique, notamment en cas de chute de l'utilisateur, provoque un effort de traction F2 important au niveau de la deuxième portion de corde prolongée, ledit effort étant supérieur à celui F1 appliqué à la première portion de corde plus courte. Une partie de l'effort est repris par le frottement de la corde sur le mousqueton entre les deux portions de corde. Le diagramme de la figure 8 illustre la variation de l'allongement en fonction de l'effort, dans lequel l'allongement d2 sur la deuxième portion de corde est supérieur à l'allongement d1 sur la première portion de corde. Cette différence d'allongement des deux portions de corde entraîne une répartition non uniforme des contraintes mécaniques exercées sur les points de couture et les brins de liaison lorsque la corde se trouve dans l'état tendu .La résistance de rupture d'une telle attache à couture conventionnelle est limitée.The tensioning of an elastic rope, in particular in the event of the user falling, causes a significant tensile force F2 at the level of the second extended portion of rope, said effort being greater than that F1 applied to the first portion of shorter rope. Part of the effort is taken up by the friction of the rope on the carabiner between the two portions of rope. The diagram in FIG. 8 illustrates the variation in the elongation as a function of the force, in which the elongation d2 on the second portion of rope is greater than the elongation d1 on the first portion of rope. This difference in elongation of the two portions of rope results in a non-uniform distribution of the mechanical stresses exerted on the stitching points and the connecting strands when the rope is in the stretched state. The breaking strength of such a fastener conventional sewing is limited.

Un premier objet de l'invention consiste à améliorer la résistance mécanique d'une boucle d'attache cousue pour une corde élastique.A first object of the invention consists in improving the mechanical resistance of a sewn attachment loop for an elastic cord.

La boucle d'attache selon l'invention est caractérisée en ce que la couture présente une structure dissymétrique dans l'état non tendu, autorisant une répartition homogène des contraintes mécaniques dans les brins de liaison lors de la mise sous tension de la boucle à l'état tendu.The attachment loop according to the invention is characterized in that the seam has an asymmetrical structure in the untensioned state, allowing a homogeneous distribution of mechanical stresses in the connecting strands when tensioning the loop in the stretched state.

Selon un mode de réalisation de l'invention, les points de couture situés le long de la première portion de corde s'étendent dans l'état non tendu de la corde, selon un échelonnement longitudinal L1 supérieur à celui L2 affecté aux points de couture de la deuxième portion de corde, la variation de l'échelonnement desdits points de couture provoquant une inclinaison progressive des brins de liaison le long de la couture.According to one embodiment of the invention, the stitching points located along the first portion of rope extend in the untensioned state of the rope, according to a longitudinal staggering L1 greater than that L2 assigned to the stitching points of the second portion of cord, the variation in the staggering of said sewing points causing a progressive inclination of the connecting strands along the seam.

Selon un deuxième mode de réalisation de l'invention, la couture comporte une pluralité de séries de points de couture, ayant chacune le même nombre de points de couture, et un écartement latéral variable d'une série à l'autre, l'écartement le plus réduit étant situé au voisinage de la boucle, et le plus important étant positionné près du bout de la première portion de corde.According to a second embodiment of the invention, the seam comprises a plurality of series of sewing stitches, each having the same number of sewing stitches, and a lateral spacing which varies from one series to another, the spacing the smallest being located near the loop, and the largest being positioned near the end of the first portion of rope.

Un deuxième objet de l'invention concerne la mise en oeuvre d'un procédé de fabrication de la boucle d'attache cousue.A second object of the invention relates to the implementation of a method of manufacturing the sewn fastening loop.

Il est possible d'effectuer une couture progressive en faisant varier la distance d'espacement des points de couture sur la première portion de corde, et en conservant la même distance d'espacement pour les points de couture de la deuxième portion de corde.It is possible to carry out a progressive sewing by varying the spacing distance of the sewing stitches on the first portion of rope, and keeping the same spacing distance for the sewing stitches of the second portion of rope.

Une autre possibilité consiste à opérer une couture droite en utilisant les étapes suivantes:

  • la première portion de corde est comprimée dans le sens longitudinal pendant l'opération de couture,
  • le pas d'espacement des points de couture est conservé constant sur chaque portion de corde pendant ladite opération,
  • le relâchement de la force de compression à la fin de l'opération de couture provoque ensuite la détente de la première portion de corde, pour obtenir ladite structure dissymétrique dans l'état non tendu.
Another possibility is to operate a straight seam using the following steps:
  • the first portion of cord is compressed in the longitudinal direction during the sewing operation,
  • the stitch spacing pitch is kept constant on each portion of cord during said operation,
  • the relaxation of the compressive force at the end of the sewing operation then causes the first portion of cord to relax, to obtain said asymmetrical structure in the untensioned state.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de différents modes de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés dans lesquels:

  • la figure 1 est une vue schématique d'une boucle d'attache cousue selon l'invention, la boucle étant représentée dans l'état non tendu de repos; - les figures 2 et 3 montrent des vues identiques à la figure 1, respectivement lors de la mise en charge et dans l'état tendu de la corde;
  • la figure 4 est une vue en coupe selon la ligne 4-4 de la figure 1; - la figure 5 représente un mode de réalisation de la couture selon l'invention, après compression préalable de la portion de corde la plus courte;
  • la figure 6 est une vue identique à la figure 5, après le relâchement de la portion de corde comprimée;
  • la figure 7 est une vue identique à la figure 6, dans l'état tendu de l'attache; - la figure 8 illustre la variation de l'allongement en fonction de l'effort pour une corde élastique des figures 1 à 3;
  • la figure 9 montre le diagramme des efforts en fonction de l'allongement de la zone de couture pour la corde selon les figures 5 à 7;
  • la figure 10 est une vue identique à la figure 5 d'une variante de réalisation;
  • la figure 11 est une vue en coupe selon la ligne 11-11 de la figure 10.
Other advantages and characteristics will emerge more clearly from the description which follows of different embodiments of the invention, given by way of nonlimiting examples, and represented in the appended drawings in which:
  • Figure 1 is a schematic view of a sewn attachment loop according to the invention, the loop being shown in the non-tensioned state of rest; - Figures 2 and 3 show views identical to Figure 1, respectively during loading and in the stretched state of the rope;
  • Figure 4 is a sectional view along line 4-4 of Figure 1; - Figure 5 shows an embodiment of the seam according to the invention, after prior compression of the shortest portion of rope;
  • Figure 6 is a view identical to Figure 5, after the release of the compressed rope portion;
  • Figure 7 is a view identical to Figure 6, in the tensioned state of the fastener; - Figure 8 illustrates the variation in elongation as a function of the force for an elastic cord of Figures 1 to 3;
  • FIG. 9 shows the diagram of the forces as a function of the elongation of the sewing area for the rope according to FIGS. 5 to 7;
  • Figure 10 is a view identical to Figure 5 of an alternative embodiment;
  • FIG. 11 is a sectional view along line 11-11 of FIG. 10.

En référence aux figures 1 à 4, une boucle d'attache 10 d'une corde élastique 12, notamment à section circulaire, est formée à partir d'une première portion de corde 14 appliquée et solidarisée contre une deuxième portion de corde 16 par une couture 18 allongée. La première portion de corde 14 constitue la partie terminale, qui est plus courte que la deuxième portion de corde 16 prolongée.With reference to FIGS. 1 to 4, an attachment loop 10 of an elastic rope 12, in particular of circular section, is formed from a first portion of rope 14 applied and secured against a second portion of rope 16 by a extended seam 18. The first portion of rope 14 constitutes the terminal portion, which is shorter than the second portion of extended rope 16.

La corde élastique 12 est dotée d'une élasticité longitudinale prédéterminée, et en cas d'apparition d'un effort de traction, la composante F2 de la force de traction s'exerçant sur la deuxième portion de corde 16 prolongée est supérieure à la composante F1 à laquelle est soumise la première portion de corde 14 la plus courte. Pour éviter dans l'état tendu les effets néfastes d'un allongement différentiel exagéré entre les deux portions de corde 14, 16 adjacentes, la couture 18 est réalisée selon une configuration longitudinale spécifique faisant usage d'une répartition progressive des points de couture.The elastic cord 12 is provided with a predetermined longitudinal elasticity, and in the event of the appearance of a tensile force, the component F2 of the tensile force exerted on the second portion of prolonged cord 16 is greater than the component F1 to which the shortest first portion of cord 14 is subjected. To avoid in the stretched state the harmful effects of an exaggerated differential elongation between the two adjacent portions of cord 14, 16, the seam 18 is produced according to a specific longitudinal configuration making use of a progressive distribution of the seam stitches.

La portion de corde 14 comporte des points de couture 20A, 22A échelonnés à intervales réguliers sur une distance longitudinale L1. L'autre portion de corde 16 est dotée du même nombre de points de couture 20B, 22B échelonnés sur une distance L2. Dans l'état non tendu de la corde, la distance L2 est inférieure à la distance L1.The portion of cord 14 comprises sewing stitches 20A, 22A staggered at regular intervals over a longitudinal distance L1. The other portion of cord 16 is provided with the same number of sewing stitches 20B, 22B staggered over a distance L2. In the untensioned state of the cord, the distance L2 is less than the distance L1.

Les points de couture 20A,22A; 20B,22B de la couture 18 sont réunis entre eux par des brins de liaisons 26,30 disposés respectivement sur la face supérieure et la face inférieure de l'attache 10.Sewing stitches 20A, 22A; 20B, 22B of the seam 18 are joined together by connecting strands 26.30 arranged respectively on the upper face and the lower face of the fastener 10.

Dans l'état non tendu de repos de la couture 18 représenté à la figure 1, la variation des échelonnements L1 et L2 provoque une inclinaison progressive des brins de liaison 26, 30 en direction du bout de la première portion 14.In the non-stretched state of rest of the seam 18 shown in FIG. 1, the variation of the staggerings L1 and L2 causes a progressive inclination of the connecting strands 26, 30 in the direction of the end of the first portion 14.

Lors de la mise en charge de la corde 12 sous l'action de la force de traction, la deuxième portion de corde 16 de l'attache 10 s'allonge davantage que la première portion de corde 14. Dans la figure 2, les points de couture 20A,22A de la première portion 14 se trouve alors en regard des points de couture 20B, 22B de la deuxième portion 16.When the rope 12 is loaded under the action of the tensile force, the second portion of rope 16 of the fastener 10 becomes longer than the first portion of rope 14. In FIG. 2, the points 20A, 22A of the first portion 14 is then opposite the stitching points 20B, 22B of the second portion 16.

Dans l'état tendu représenté à la figure 3, les brins de liaison 26 restent sensiblement parallèles, de manière à obtenir une répartition homogène des contraintes mécaniques dans la couture 18, même si la force F2 appliquée à la deuxième portion de corde 16 est supérieure à la force F1 sur la première portion de corde 14. La figure 8 illustre les courbes représentatives de la force de traction en fonction des allongements des deux tronçons de corde 14, 16, permettant d'obtenir une même longueur finale L1+d1 et L2 + d2 pour une force F2 supérieure à F1. Les brins de liaison 26, 30 de la couture 18 s'inclinent légèrement, mais restent parallèles entre eux. La résistance mécanique à la rupture est ainsi améliorée, ce qui est particulièrement avantageux pour la sécurité lorsque la boucle d'attache 10 est utilisée en escalade, notamment sur une corde de rappel, ou une longe d'assurance.In the stretched state shown in FIG. 3, the connecting strands 26 remain substantially parallel, so as to obtain a homogeneous distribution of the mechanical stresses in the seam 18, even if the force F2 applied to the second portion of rope 16 is greater at the force F1 on the first portion of rope 14. FIG. 8 illustrates the curves representative of the tensile force as a function of the elongations of the two sections of rope 14, 16, making it possible to obtain the same final length L1 + d1 and L2 + d2 for a force F2 greater than F1. The connecting strands 26, 30 of the seam 18 tilt slightly, but remain parallel to each other. The mechanical resistance to rupture is thus improved, which is particularly advantageous for safety when the attachment loop 10 is used in climbing, in particular on a rope, or a lanyard.

Au lieu de réaliser une couture progressive cousue dans le cas de la figure 1, il est également possible de faire une couture 18 droite (figure 5) après compression préalable de la première portion de corde 14 dans le sens de la flèche F3. Le bout de la première portion de corde 14 est ainsi déplacé de la position A vers la position B pendant l'opération de couture, au cours de laquelle tous les brins de liaison 26, 30 s'étendent parallèlement entre eux selon une direction perpendiculaire à l'interface 32 longitudinal entre les deux portions de corde 14, 16. Tous les points de couture sont échelonnés à intervalles réguliers sur la distance L2. La corde relâchée (figure 6) reprend ensuite l'agencement des points évolutifs conforme à la figure 1.Instead of making a progressive seam sewn in the case of FIG. 1, it is also possible to make a straight seam 18 (FIG. 5) after prior compression of the first portion of cord 14 in the direction of the arrow F3. The end of the first portion of cord 14 is thus moved from position A to position B during the sewing operation, during which all the connecting strands 26, 30 extend parallel to each other in a direction perpendicular to the longitudinal interface 32 between the two portions of cord 14, 16. All the sewing stitches are staggered at regular intervals over the distance L2. The relaxed rope (Figure 6) then resumes the arrangement of evolutionary points in accordance with Figure 1.

Sur la figure 9, l'allongement est nul lors de la fabrication de la couture. La première portion 14 est cousue dans l'état comprimé (F3 négatif) et l'autre portion de corde 16 est cousue sans effort F0. Dans l'état tendu de la corde, la force F2 est supérieure à F1, mais l'allongement d3 des deux portions de corde 14,16 est identique. Il en résulte une répartition homogène des contraintes dans les brins de liaison 26, 30 inclinés et parallèles (figure 7).In FIG. 9, the elongation is zero during the manufacture of the seam. The first portion 14 is sewn in the compressed state (F3 negative) and the other portion of cord 16 is sewn effortlessly F0. In the stretched state of the rope, the force F2 is greater than F1, but the elongation d3 of the two portions of rope 14,16 is identical. This results in a homogeneous distribution of the stresses in the connecting strands 26, 30 inclined and parallel (FIG. 7).

Il est bien entendu possible de modifier la structure de la couture 18 en choisissant d'une manière appropriée le nombre et l'emplacement des points de couture sur chaque portion de corde 14, 16.It is of course possible to modify the structure of the seam 18 by appropriately choosing the number and the location of the stitches on each portion of cord 14, 16.

En référence aux figures 10 et 11, la boucle 100 comporte une pluralité de séries A1, A2, A3 de points de couture partiellement superposés entre les deux tronçons de corde 114,116. La différence d'allongement des deux portions cousues est d'autant plus importante que la longueur cousue est grande. La série A1 est la plus longue pour un écartement minimum des brins de liaison. La série A2 est plus courte que la série A1, mais présente un écartement supérieur. La troisième série A3 est plus courte que la série A2, mais avec un écartement supérieur. Cette dissymétrie entre les points de couture des trois séries superposées permet ainsi de diminuer la longueur effective de la couture.With reference to FIGS. 10 and 11, the loop 100 comprises a plurality of series A1, A2, A3 of sewing stitches partially superimposed between the two sections of rope 114,116. The difference in elongation of the two sewn portions is greater the greater the sewn length. The A1 series is the longest for a minimum spacing of the connecting strands. The A2 series is shorter than the A1 series, but has a greater spacing. The third A3 series is shorter than the A2 series, but with a greater gauge. This asymmetry between the stitches of the three superimposed series thus makes it possible to reduce the effective length of the seam.

Le fil utilisé pour réaliser la couture 18, 118 est un fil textile à base de fibres synthétiques, et de grande résistance mécanique. La corde 12 élastique est une corde d'assurance classique de commerce, utilisée dans le domaine de l'escalade ou des travaux de grandes hauteurs pour absorber l'énergie en cas de chute.The thread used for sewing 18, 118 is a textile thread based on synthetic fibers, and of great mechanical resistance. The elastic cord 12 is a classic commercial lifeline, used in the field of climbing or work of great heights to absorb energy in the event of a fall.

Selon la couture 18 des figures 1 à 7, les points de couture sur chaque portion de corde s'étendent selon des lignes parallèles à l'interface 32 longitudinal d'accolement des deux portions de corde.According to the seam 18 of FIGS. 1 to 7, the stitching points on each portion of rope extend along lines parallel to the longitudinal interface 32 of joining of the two portions of rope.

Claims (6)

Boucle d'attache cousue pour une corde élastique, notamment à section circulaire, comprenant: - une première portion de corde (14, 114) appliquée et solidarisée contre une deuxième portion de corde (16, 116) par des moyens de fixation à couture (18, 118) allongée, la longueur de la première portion étant plus courte que la deuxième portion prolongée, - une pluralité de spires élémentaires de fil pour constituer ladite couture et comprenant une succession de points de couture (20A, 22A; 20B, 22B) réunis entre eux par des brins de liaison (26,30), caractérisée en ce que la couture (18,118) présente dans l'état non tendu une structure dissymétrique autorisant une répartition homogène des contraintes mécaniques dans les brins de liaison (26,30) lors de la mise sous tension de la boucle à l'état tendu.Attachment loop sewn for an elastic cord, in particular with circular section, comprising: - A first portion of rope (14, 114) applied and secured against a second portion of rope (16, 116) by elongated seam fastening means (18, 118), the length of the first portion being shorter than the second extended portion, a plurality of elementary turns of wire to constitute said seam and comprising a succession of stitching points (20A, 22A; 20B, 22B) joined together by connecting strands (26,30), characterized in that the seam (18,118) has, in the non-stretched state, an asymmetrical structure allowing a homogeneous distribution of the mechanical stresses in the connecting strands (26,30) during the tensioning of the loop in the stretched state . Boucle d'attache pour une corde élastique selon la revendication 1, caractérisée en ce que les points de couture (20A, 22A) situés le long de la première portion de corde (14) s'étendent dans l'état non tendu de la corde (12) selon un échelonnement longitudinal L1 supérieur à celui L2 affecté aux points de couture (20B, 22B) de la deuxième portion de corde (16, 116), la variation de l'échelonnement desdits points de couture provoquant une inclinaison progressive des brins de liaison (26, 30) le long de la couture (18).Attachment loop for an elastic rope according to claim 1, characterized in that the sewing points (20A, 22A) located along the first portion of rope (14) extend in the untensioned state of the rope (12) according to a longitudinal staggering L1 greater than that L2 assigned to the sewing points (20B, 22B) of the second portion of cord (16, 116), the variation in the staggering of said sewing points causing a progressive inclination of the strands connecting (26, 30) along the seam (18). Boucle d'attache pour une corde élastique selon la revendication 2, caractérisée en ce que les points de couture sur chaque portion de corde (14, 16) s'étendent selon des lignes parallèles à l'interface (32) longitudinal d'accolement des deux portions de corde.Attachment loop for an elastic cord according to claim 2, characterized in that the stitching points on each portion of cord (14, 16) extend along lines parallel to the longitudinal interface (32) of attachment of two portions of rope. Boucle d'attache pour une corde élastique selon la revendication 1, caractérisée en ce que la couture (118) comporte une pluralité de séries (A1,A2,A3...) superposées de points de couture, présentant une longueur et un écartement latéral variables d'une série à l'autre, la première série A1 la plus longue ayant un écartement minimum.Attachment loop for an elastic cord according to claim 1, characterized in that the seam (118) comprises a plurality of series (A1, A2, A3 ...) superimposed on sewing points, having a length and a lateral spacing variable from one series to another, the first longest series A1 having a minimum spacing. Procédé de fabrication d'une boucle selon l'une des revendications 1 à 3, caractérisé en ce que la couture (18) est réalisée en faisant varier la distance d'espacement des points de couture (20A, 22A) sur la première portion de corde (14), et en conservant la même distance d'espacement pour les points de couture (20B, 22B) de la deuxième portion de corde (16).Method of manufacturing a loop according to one of claims 1 to 3, characterized in that the seam (18) is produced by varying the spacing distance of the seam stitches (20A, 22A) on the first portion of cord (14), and keeping the same spacing distance for the sewing stitches (20B, 22B) of the second portion of cord (16). Procédé de fabrication d'une boucle selon l'une des revendications 1 à 4, caractérisé par les étapes suivantes: - la première portion de corde (14, 114) est comprimée dans le sens longitudinal pendant l'opération de couture, - le pas d'espacement des points de couture est conservé constant sur chaque portion de corde pendant ladite opération, - le relâchement de la force de compression à la fin de l'opération de couture provoque ensuite la détente de la première portion de corde (14, 114) pour obtenir ladite structure dissymétrique dans l'état non tendu. Method of manufacturing a loop according to one of claims 1 to 4, characterized by the following steps: - the first portion of cord (14, 114) is compressed in the longitudinal direction during the sewing operation, - the pitch of sewing stitch spacing is kept constant on each portion of cord during said operation, - the relaxation of the compression force at the end of the sewing operation then causes the first portion of cord (14, 114) to relax to obtain said asymmetrical structure in the non-stretched state.
EP96410101A 1995-10-10 1996-10-01 Sewn attachment loop for an elastic rope, and method of making it Revoked EP0768100B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512071 1995-10-10
FR9512071A FR2739567B1 (en) 1995-10-10 1995-10-10 TIE BUCKLE STITCHED FOR AN ELASTIC ROPE, AND METHOD FOR MANUFACTURING THE BUCKLE

Publications (2)

Publication Number Publication Date
EP0768100A1 true EP0768100A1 (en) 1997-04-16
EP0768100B1 EP0768100B1 (en) 2001-08-08

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EP96410101A Revoked EP0768100B1 (en) 1995-10-10 1996-10-01 Sewn attachment loop for an elastic rope, and method of making it

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US (1) US5829374A (en)
EP (1) EP0768100B1 (en)
JP (1) JPH09291489A (en)
KR (1) KR970021506A (en)
AU (1) AU703695B2 (en)
DE (1) DE69614334T2 (en)
ES (1) ES2161339T3 (en)
FR (1) FR2739567B1 (en)

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EP1659209A2 (en) * 2004-11-15 2006-05-24 AB Poly-Produkter Static rope, use of a static rope and mast or boom construction including a static rope.

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ATE390952T1 (en) 2002-01-18 2008-04-15 Mamutec Ag LOOP
EP1735228A1 (en) 2004-03-30 2006-12-27 Mamutec AG End connection
AT512185B1 (en) 2011-11-28 2013-06-15 Teufelberger Gmbh THE MOST INTERRUPTED ROPE
USD747176S1 (en) * 2012-08-07 2016-01-12 Zedel Quickdraw
US11793169B2 (en) 2018-06-09 2023-10-24 Barttron Inc. Animal wearable device adjustment mechanisms and methods

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FR2713097A1 (en) * 1993-11-29 1995-06-09 Frechin Jean Paul Strap holding two snap hooks for climbing

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FR2565112A1 (en) * 1984-01-23 1985-12-06 Frechin Jean Paul Safety strap with damper for mountaineering
FR2713097A1 (en) * 1993-11-29 1995-06-09 Frechin Jean Paul Strap holding two snap hooks for climbing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659209A2 (en) * 2004-11-15 2006-05-24 AB Poly-Produkter Static rope, use of a static rope and mast or boom construction including a static rope.
EP1659209A3 (en) * 2004-11-15 2007-05-16 AB Poly-Produkter Static rope, use of a static rope and mast or boom construction including a static rope.

Also Published As

Publication number Publication date
DE69614334T2 (en) 2002-04-25
FR2739567A1 (en) 1997-04-11
FR2739567B1 (en) 1997-12-26
DE69614334D1 (en) 2001-09-13
ES2161339T3 (en) 2001-12-01
JPH09291489A (en) 1997-11-11
AU703695B2 (en) 1999-04-01
US5829374A (en) 1998-11-03
EP0768100B1 (en) 2001-08-08
KR970021506A (en) 1997-05-28
AU6806596A (en) 1997-04-17

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