Hanging device comprising a fixing zone between two strands, tether comprising such a hanging device and method for manufacturing such a hanging device

Abstract

A fastening device comprises a first strand of rope (2a, 2') and a second strand of rope (2b, 2") fastened together by a stitching zone (5) and a binding zone (11) arranged adjacently along the longitudinal directions of the strands. First stitches (6a) successively pass through the first strand (2a, 2') and the second strand (2b, 2") to fasten and secure them to both strands (2a, 2') and form the stitching zone (5). Second stitches (6b) pass around at least one of the first strand (2a, 2') and the second strand (2b, 2") and possibly pass through the other of the first strand (2a, 2') and the second strand (2b, 2") to fasten and secure the first strand (2a, 2') to the second strand (2b, 2") and form the binding zone (11).

Description

technical field

[0001] The invention relates to an attachment device comprising a fixing zone between two strands and a manufacturing method, a lanyard comprising such an attachment device and a manufacturing method for such an attachment device. State of the art

[0002] In the field of mountaineering and acrobatic work, ropes are commonly used which are configured in the form of lanyards, for example adjustable lanyards.

[0003] An example of how to make an adjustable lanyard is illustrated in figures 1, 2 and 3The adjustable lanyard 1 has a rope 2 that can be divided into a primary strand 2a and a secondary strand 2b. The primary strand 2a is attached to the secondary strand 2b to form a loop intended to create an attachment point for a harness. The primary strand 2a is attached to the secondary strand 2b by an attachment point 4, which is formed by a stitching area 5 containing several stitches 6. The stitches are made using a sewing machine that joins two threads to form the stitches.

[0004] Each strand has a first end that is attached to the user, while the other end has a connector 7 for attaching to an anchor point. The connector 7 can be a carabiner, a ring, or a loop in the rope suitable for receiving a carabiner or any other object. The primary strand 2a is a fixed strand, while the secondary strand 2b is an adjustable strand. In the illustrated embodiment, the primary strand 2a terminates with a fixed connector, while the secondary strand 2b terminates with a movable connector, thus defining an adjustable strand.

[0005] The adjustable arm has a connector 7 attached to an adjustment device 8. The adjustment device 8 is movable between a sliding position and a locking position. The adjustable arm terminates in a limit stop that defines a maximum accessible position for the adjustment device 8.

[0006] In the sliding position, the adjusting device 8 is able to slide along the secondary strand 2b in either direction. In the locked position illustrated in figures 1 to 3 The adjustment device 8 is fixedly mounted relative to the secondary strand 2b. The secondary strand 2b is divided into a main strand 2' and a terminal strand 2" which is folded and sewn onto the main strand 2' to form the end stop. The stitching of the main strand 2' to the terminal strand 2" forms a fastening area 4.

[0007] During operation, when the adjustment device 8 is pressed against the end stop, it applies a force to the fastening area 4. The force applied to the end stop by the adjustment device 8 causes a peeling force between the two strands 2a / 2b fixed to each other. The stitches 6 are arranged successively along the longitudinal direction of the strands. The force applied by the adjustment device 8 and the tension in the stitching thread cause the stitches 6 to peel one after the other. The resistance provided by the stitching area 5 is not as high as expected. To increase the mechanical performance of the stitching area 5, the number of stitches 6 forming the stitching area 5 is increased and / or the diameter of the stitching threads is increased, which has an effect.However, this has the effect of weakening the rope which is crossed by multiple stitching points 6. The formation of a longer attachment area increases the bulk.

[0008] A similar problem arises at the attachment loop 3, which is formed by the primary strand 2a and the secondary strand 2b of the rope. These two strands are joined together by a stitching area 5 to define a loop. When the two strands exiting the loop are directed in opposite directions, the stitching points 6 that close the loop are also subjected to peeling, resulting in the same degradation of mechanical performance. The same occurs when force is applied inside the attachment loop 3, which attempts to increase its circumference.

[0009] The primary strand 2a illustrates a connector 7 defining a fastening hole 9 intended to receive a carabiner and which is formed by folding the terminal strand over the main strand 2'. In this case, the two strands are subjected to a substantially uniform stress, so the seams behave differently from the previous cases. Conversely, if the diameter of the fastening hole is smaller than the diameter of the carabiner it is intended to receive, the carabiner applies stress to the strand.

[0010] It is known to cover the fixing area 4 with a cover 10 made of polymer material as illustrated in the figure 1 The cover 10 does not significantly increase the breaking strength of the attachment area 4, and in particular its resistance. The cover 10 protects the stitching points 6 from external damage.

[0011] Finally, it is known to join the two strands using a metal crimp. This operation is complex and expensive. Description of the invention

[0012] One object of the invention is to overcome these disadvantages, and more particularly to provide a fastening device whose attachment zone between two strands provides better compromises between bulk and resistance to breakage when the two strands seek to move away from each other.

[0013] These drawbacks are addressed by using a fastening device comprising: a first strand of rope and a second strand of rope; a fastening area comprising at least two stitching threads joining together without forming a knot to form a plurality of stitching points, in which the first strand has a longitudinal direction parallel to a longitudinal direction of the second strand and in which the first strand of rope is offset from the second strand of rope in a direction perpendicular to the longitudinal directions; in which the fixing zone includes a stitching zone formed by a plurality of stitches achieving the fixing of the first strand in support on the second strand, each stitch consisting of two first stitches, the first stitches being two consecutive stitches of the plurality of stitches, in which one of the stitching threads of one of the first stitches passes through the first strand and one of the stitching threads of the other of the first stitches passes through the second strand.

[0014] The fastening device is remarkable in that the fastening zone includes a ligature zone arranged adjacent to the sewing zone along the longitudinal directions and formed by a plurality of ligatures achieving the fastening of the first strand in support of the second strand, each ligature being constituted by two or three second stitches, the second stitches being two or three consecutive stitches of the plurality of stitches, in which one of the stitching threads of one of the second stitches goes around one of the first and second strands while being supported on an external lateral edge of said one of the first and second strands gone around; and one of the stitching threads of another of the second stitches goes around the other of the first and second strands while being supported on an external lateral edge of said other of the first and second strands gone around or passes through the other of the first and second strands.

[0015] According to one aspect of the invention, the second stitching points comprise stitching points going around the first strand and stitching points going around the second strand.

[0016] Preferably, the stitches going around the first strand and the stitches going around the second strand are arranged alternately according to the longitudinal directions of the stitching threads.

[0017] In a particular embodiment, the stitches passing through each other of the first strand and the second strand are stitches passing through the space between the first strand and the second strand.

[0018] Advantageously, the sewing zone and the binding zone are formed by the same threads extending continuously from the sewing zone to the binding zone.

[0019] In a particular embodiment, the hanging device includes an additional ligation zone adjacent to the sewing zone, the additional ligation zone and the ligation zone being separated by the sewing zone along the longitudinal directions of the first strand and the second strand.

[0020] Preferably, the first and second strands each have a core and a sheath. In the binding area, the second stitches pass through the sheath of the other strand of the first and second strands without passing through the core.

[0021] In another development, the hooking device includes an adjustment device configured to slide along the first strand to the fixing area forming an end stop, the binding area being disposed between the sewing area and a slider of the adjustment device and the second stitches bypassing the second strand.

[0022] Advantageously, the first and second strands form a loop that is closed by the fastening zone. The binding zone is positioned closer to the loop than the stitching zone along the longitudinal directions to prevent the loop from opening.

[0023] The invention also relates to a lanyard that offers a better compromise between its mechanical performance and its size. This is achieved by means of a lanyard that has an attachment device according to any one of the preceding configurations.

[0024] In a preferred embodiment, the first and second strands each have a connecting element. The binding zone is positioned closer to the connecting elements than the stitching zone along the longitudinal directions of the first and second strands to prevent the two connecting elements from separating.

[0025] Preferably, the attachment device has a first end having an attachment point intended to be fixed to a user and at least a second end having an anchor point intended to be fixed to an anchor.

[0026] Il It is advantageous that the attachment device intervenes to form an adjustable lanyard in which the slider forms the anchor point, the slider being mobile between a locking position and a sliding position, the slider being fixed relative to the first strand in the locking position and being free to move along the first strand in the sliding position.

[0027] Preferably, the attachment point is separated from the anchor points by the fixing zone.

[0028] The invention also relates to a method for manufacturing a simple-to-implement attachment device that improves the mechanical performance of the rope without increasing its size. This problem is addressed by a method for manufacturing a rope according to any one of the preceding configurations, comprising the following steps: the provision of a first strand and a second strand; the fixing of the first strand in contact with the second strand, the first strand having a longitudinal direction parallel to a longitudinal direction of the second strand; wherein the fixing step includes a sewing step using at least two sewing threads defining first stitches passing successively through the first strand and the second strand to fix the first strand with the second strand.

[0029] The process is remarkable in that prior to or subsequent to the sewing stage, the process includes a binding stage which fixes the first strand against the second strand, the binding being formed by at least two threads tied together to define second stitches, each binding going around at least one of the first and second strands and binding to the other of the first and second strands, the binding area being arranged adjacent to the sewing area along the longitudinal directions of the first and second strands.

[0030] Preferably, the binding and sewing stages are carried out using the same sewing machine, with the sewing threads extending continuously between the binding and sewing stages. Description of the drawings

[0031] Other advantages and features will become clearer from the following description of particular embodiments and implementations of the invention, given by way of non-limiting examples and shown in the accompanying drawings, in which: there figure 1 schematically illustrates a tether according to the prior art, the attachment area of ​​which is covered by a hood; the figure 2 schematically illustrates the tether according to prior art, the attachment area of ​​which lacks a cover; the figure 3 schematically illustrates an adjustment element supported on a terminal strand according to the prior art; the figure 4 schematically illustrates a lanyard according to a first embodiment in which the attachment area is without a cover; the figure 5 schematically illustrates a strand of rope receiving an adjustment element resting on a terminal strand; the figure 6schematically illustrates a fastening device according to a second embodiment equipped with a loop attachment area and whose two strands are separated from each other outside the loop; the figure 7 schematically illustrates a fastening device according to a third embodiment equipped with a loop attachment zone and whose two strands are separated from each other within the loop; the figure 8 schematically illustrates a fastening device according to a fourth embodiment provided with a loop attachment zone and whose two strands are separated from each other inside and outside the loop; the figure 9 schematically illustrates a fixation zone equipped with a first embodiment of the ligation zone; the Figure 10 schematically illustrates a fixation zone equipped with a second embodiment of the ligation zone; the figure 11schematically illustrates a fixation zone equipped with a third embodiment of the ligation zone; the figure 12 schematically illustrates a fixation zone equipped with a fourth embodiment of the ligature zone; the figure 13 schematically illustrates a fixation zone equipped with a fifth embodiment of the ligature zone; the figure 14 schematically illustrates a fixation zone equipped with a sixth embodiment of the ligature zone; the figure 15 schematically illustrates a fixation zone equipped with a seventh embodiment of the ligature zone. Detailed description

[0032] There figure 4 represents an attachment device that has at least a first strand and a second strand. The attachment device can be a lanyard 1 as illustrated in the figure 4 .

[0033] The first and second strands have a length that is greater than their width and greater than their thickness. Preferably, the length is at least five times, or even at least ten times, greater than the width and thickness. In a particular embodiment, the first and / or second strands have a circular or substantially circular cross-section.

[0034] The fastening device has a fastening zone 4 where the first strand has a longitudinal direction parallel to a longitudinal direction of the second strand. In the fastening zone 4, the first strand is fixedly supported by the second strand. The fastening zone 4 is formed by a plurality of stitches 6. By stitches, we mean stitches formed by a sewing machine, that is, with two threads that interlock to secure a portion of the first and second strands. Two consecutive stitches are joined by the two threads.

[0035] In the attachment zone 4, the first strand may be in direct contact with the second strand, or the first strand may be separated from the second strand by an intervening element. The stitches 6 apply a compressive force from the first strand towards the second strand and from the second strand towards the first strand. The first and second strands each have an inner face that is in contact or directly opposite in a direction perpendicular to the longitudinal direction of the strands, and an outer face that is opposite the inner face in said perpendicular direction.

[0036] In the fixing zone 4, the first strand and the second strand deform identically along the longitudinal direction of the strands until the stitch points 6 or one of the strands break.

[0037] The attachment zone 4 includes a stitching zone 5 formed by the first stitches 6a of the plurality of stitches 6. The first stitches 6a pass successively through the first and second strands to secure themselves against the second strand. In other words, the sewing machine needle passes through either the first or second strand to pull the thread through, which is then trapped within the strand. The thread's passage through the strand secures its position along the longitudinal direction of the strand. A seam is formed by two successive stitches that pass through the first and second strands, respectively. The stitch passes through both the first and second strands, and the tension applied to the two threads secures the first strand to the second strand. The stitch passing through the strand weakens it. IlIt has been observed that this weakening of the strand facilitates strand breakage. This degradation is noticeable when the attachment zone 4 is subjected to shedding, that is, with a force that tends to separate the two strands perpendicularly to the longitudinal direction.

[0038] In order to improve resistance to peeling when the first and second strands are subjected to forces which tend to separate the first and second strands, the attachment zone 4 has a ligature zone 11 where the first strand has a longitudinal direction parallel to a longitudinal direction of the second strand and where the first strand is fixedly mounted in support on the second strand.

[0039] The ligation zone 11It is formed by several ligations made one after the other along the longitudinal direction of the strands. The ligation zones are preferentially supported against each other along the longitudinal direction of the strands. The ligation is formed by two consecutive stitches, one stitch going around the first strand and the other stitch passing through or around the second strand. The reverse is also possible. Alternatively, the ligation is formed by three consecutive stitches, one stitch going around the first strand, one stitch passing between the first and second strands, and the last stitch going around the second strand.

[0040] In a seam, a stitching thread passes through the first and second strands, preferably passing through the strand along its diameter, thus maximizing interaction with the strand. In a ligature, the bond between the two strands has weak interaction with at least one of the strands to avoid degrading mechanical performance along the longitudinal direction of the strands, and preferably to avoid degrading the mechanical performance of both strands along their longitudinal direction. Il It is therefore advantageous not to cross the strand(s) or to limit the passage through the strand(s).

[0041] By going around a strand, we mean that the sewing threads go around the outer face of the strand without going into the strand. IlIt is also possible that the sewing thread penetrates the periphery of the strand, for example, to a distance that corresponds to less than 33% of the strand's diameter. The thread penetrates the outer part of the strand and not the inner part.

[0042] The ties are formed by second stitches 6b from the plurality of stitches 6. The second stitches 6b are formed identically to the first stitches, but in pairs of two consecutive second stitches 6b, at least one of the second stitches 6b goes around at least one of the first and second strands. The tension force applied to the stitching threads presses the two strands against each other in a direction perpendicular to the longitudinal direction. The less the stitching thread is inserted into the strand, the more the stitching thread is able to move along the longitudinal direction of the thread in order to even out the tension in the thread.Since the tension in the sewing thread is more homogeneous between the multiple second stitches 6b, the mechanical behavior of the second stitches 6b is different from the mechanical behavior of the first stitches 6a with respect to a predefined force which tends to separate the first strand and the second strand.

[0043] The portion of thread that wraps around the strand prevents weakening the strand. When stress is applied to the fur, the binding maintains the force that seeks to press the two strands together without a stitch passing through the central part of the strand and applying force along its longitudinal direction. Displacement of the binding along the longitudinal direction of the strands is prevented by having a second stitch 6b that passes through the other strand or by anchoring against the stitching zone 5. It is particularly advantageous for the bindings to be positioned against each other along the longitudinal direction of the strands and, if necessary, for an end binding to be anchored against a stitch in the stitching zone 5.

[0044] The fastening zone 4 includes at least one binding zone 11, which is located adjacent to the stitching zone 5 along the longitudinal directions of the strands. In the binding zone 11, the stitches 6 are predominantly or exclusively second stitches 6b. In the stitching zone 5, the stitches 6 are predominantly or exclusively first stitches 6a. Advantageously, the binding zone 11 lacks a first stitch 6a.

[0045] It is particularly advantageous that the second stitches 6b be at least five consecutive second stitches 6b in the longitudinal direction of the stitching threads so as to have significant links between the first strand and the second strand.

[0046] The second 6b stitches are arranged one behind the other along the longitudinal direction of the stitching threads.

[0047] The threads forming the first stitches 6a and the second stitches 6b are subjected to tension to press the first strand against the second strand in a direction perpendicular to the longitudinal direction of the strands. The threads compress the strands.

[0048] The seams in sewing zone 5 are arranged one behind the other along the longitudinal direction of the strands. Preferably, the first stitches 6a are made alternately in the first strand and in the second strand.

[0049] The ties in the tying zone 11 are arranged one behind the other along the longitudinal direction of the strands. Preferably, the tying zone 11 has at least five ties. Preferably, the second stitches 6b are made alternately in the first strand and around the second strand. The around-the-way stitching is done around the outer face of the strand, that is, the face opposite the inner face. The inner face of the first strand is directly opposite the inner face of the second strand. It is also possible to provide several groups of three second stitches 6b, each comprising a around-the-first strand, a second stitch 6b formed between the inner faces of the strands, and a around-the-second strand.

[0050] It is particularly advantageous for the first and / or second strand to have a core and sheath with different mechanical properties. The sheath is preferably a braided or knitted material around the core. The core is preferably formed of strands extending parallel or substantially parallel to each other. It is particularly advantageous for the first and second strands to have the same configuration with a core and sheath. More advantageously, the sheaths of the first and second strands are identical, and the cores of the first and second strands are identical. Advantageously, the first and second strands belong to the same rope.

[0051] In an advantageous configuration, the first strand is extended by the second strand. More advantageously, the core of the first strand is extended by the core of the second strand and / or the sheath of the first strand is extended by the sheath of the second strand.

[0052] In an alternative embodiment, the first and second strands belong to two different strings. It is also possible that the two strings have different characteristics. For example, the two strands may differ from each other in diameter, in the materials used for the sheath, in the materials used for the core, in the braiding or knitting patterns used to form the sheaths, or in the number of strands used to form the core.

[0053] When the first and second strands have a core and sheath structure, the second 6b stitches that go around the first or second strand are second 6b stitches that do not pass through the core of the first or second strand. Preferably, the stitching thread passes through the outer half of the sheath thickness, and even more preferably, it does not pass through the sheath.

[0054] It is advantageous for the second 6b stitches to bypass at least one of the cores of the first strand and the core of the second strand, and preferably one of the sheaths of the first strand and the sheath of the second strand. Bypassing the sheath, that is, avoiding the passage through the thickness of the first and / or second strand, prevents weakening the strand.

[0055] Different configurations of second stitches (6b) are used to form the bindings best suited to the needs. In the embodiment illustrated in the figure 4 , three distinct and different fixing zones 4 are formed in order to respond to different forces.

[0056] There figure 4 Figure 1 illustrates a lanyard 1 having one end designed to attach to a harness and two other ends designed to attach to an anchor point. The lanyard 1 is formed from a single rope 2 which is folded several times to define the different expected functions: here, a ring forming a loop, another ring forming a connector 7, and an end stop.

[0057] The rope 2 has a primary strand 2a and a secondary strand 2b which are joined together by an attachment zone 4. The primary strand 2a forms the first strand, while the secondary strand 2b forms the second strand. In the illustrated embodiment, the primary strand 2a extends the secondary strand 2b such that the attachment zone 4 defines a hanging loop 3 or a loop for receiving a connector 7.

[0058] Since the hooking ring 3 can be subjected to a force aimed at separating the first and second strands inside the hooking ring 3, it is advantageous that the attachment area 4 has a ligature area 11 disposed between the hooking ring 3 and the stitching area 5. In other words, the ligature area 11 is disposed inside the hooking ring 3 closed by the stitching area 5.

[0059] At the exit of the attachment zone 4, inside the hook ring 3, there is a free zone where the first and second strands can be moved independently to apply the force needed to separate them. It is advantageous to create second stitches 6b that bypass the first and second strands. In this free zone, the two strands are not bound to each other.

[0060] In one particular embodiment, the second 6b stitches have at least one second 6b stitch where the two threads forming the second stitches overlap the first and second strands simultaneously. In other words, the two threads forming the consecutive second 6b stitches meet at two attachment points separated by the first and second strands.

[0061] In another particular embodiment, the second stitches 6b have at least one second stitch 6b where the two threads forming the second stitches 6b overlap only the first strand and only the second strand at a time. The second stitches 6b have links between the two stitching threads located between the first and second strands. Preferably, the second stitches 6b exhibit an alternation between a link that overlaps the first strand and a link that overlaps the second strand. The alternation of second stitches 6b between the first and second strands allows for better stitch performance.When creating the second stitch (6b), the needle passes between the two strands without penetrating them, thus preventing any degradation of the strands' mechanical performance along their longitudinal direction. The needle may penetrate the circumference of the strand, for example, less than 10% of its diameter, which further limits mechanical degradation. The threads are held between the first and second strands, maintaining the position of the second stitches even when force is applied that would otherwise pull the first and second strands apart.

[0062] In another particular embodiment, the second set of stitches has at least one stitch where the two threads forming the second set of stitches overlap both the first and second strands simultaneously. The second set of stitches has connections between the two threads located between the first and second strands. In other words, the two threads forming the second set of stitches meet at two attachment points separated by the first and second strands. Again, it is advantageous to alternate a stitch around the first strand and a stitch around the second strand. Using two threads that meet to define each binding allows for better stress management along the bindings, resulting in a more even distribution of the work over the entire length of the binding area.

[0063] In another particular embodiment, the second 6b stitches have at least one second 6b stitch where the two threads forming the second 6b stitches pass through one of the first and second strands and around the other of the first and second strands. Preferably, the thread or threads passing through one of the first and second strands pass substantially through the center of the strand. The threads leaving the strand overlap the other of the first and second strands and bind together on the outside of the other strand to securely fasten the first strand to the second strand. Here again, it is advantageous to alternate a binding around the first strand and a binding around the second strand. In other words, there is an alternation between a binding that passes through the first strand and binds against the second strand and a binding that passes through the second strand and binds against the first strand.

[0064] In the embodiment illustrated in the figure 4 There is also a configuration where an element is able to slide along a main strand 2' and where a terminal strand 2" is attached to the main strand 2' to form an end stop. The end stop is formed by a first strand and a second strand fixed to each other by a fastening zone 4. The binding zone 11 is located between an adjustment device 8 formed by a sliding element and the stitching zone 5. The binding zone 11 provides better resistance to the forces applied by the sliding element bearing against the fastening zone 4 compared to a fastening zone 4 with only a single stitching zone 5.

[0065] The sliding element generates a force on the terminal strand 2" which tends to separate the main strand 2' and the terminal strand 2". To improve the peel resistance performance of the attachment zone 4, the attachment zone 4 has a binding zone 11. The binding zone 11 is located between the stitching zone 5 and the sliding element along the longitudinal direction of the main strand 2'.

[0066] The ligature zone 11 may have second stitches 6b which go around the main strand 2'.

[0067] THE figures 9 to 15 illustrate different ways of realizing a fixation zone 4 with multiple variants of the configuration of the ligature zone 11.

[0068] There figure 9 and the Figure 10illustrate a binding zone 11 where the second stitches 6b penetrate the first strand and go around the second strand. The first strand can be a primary strand 2a or a secondary strand 2b. The first strand is preferably a terminal strand 2". The second strand is formed from the other strand. In the figure 9 The sewing thread passes through the soul, while in the Figure 10 The sewing thread passes through the sheath.

[0069] There figure 11 and the figure 12 illustrate a binding zone 11 where the second stitches 6b do not penetrate the first strand, nor the second strand. The stitching threads go around the outer faces of the first and second strands. The first strand can be a primary strand 2a or a secondary strand 2b. The first strand is preferably a terminal strand 2". The second strand is formed from the other strand. The figure 11 illustrates a crossing of the two strands while the figure 12illustrates the creation of a stitch between the two strands.

[0070] THE Figures 13, 14, 15 illustrate a binding zone 11 where the second stitches 6b penetrate alternately into the first strand and then into the second strand. The stitching threads alternately go around the outer faces of the second strand and the first strand. Depending on the configurations, the stitching threads penetrate to pass through both cores ( figure 13 ), the two sheaths without the cores ( figure 15 ) or a single soul ( figure 14 The first strand can be a primary strand 2a or a secondary strand 2b. The first strand is preferentially a terminal strand 2". The second strand is formed from the other strand.

[0071] It is also advantageous to have a rope harness with a lanyard 1 such as the one illustrated in one of the previous embodiments.

Claims

1. Attachment device (1) comprising: - a first strand (2a, 2') of rope and a second strand (2b, 2") of rope; - a fastening area (4) comprising at least two stitching threads joining together without forming a knot to form a plurality of stitching points (6), in which the first strand (2a, 2') has a longitudinal direction parallel to a longitudinal direction of the second strand (2b, 2") and in which the first strand of rope (2a, 2') is offset from the second strand of rope (2b, 2") in a direction perpendicular to the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2");in which the fixing zone (4) comprises a sewing zone (5) formed by a plurality of stitches achieving the fixing of the first strand (2a, 2') in support of the second strand (2b, 2"), each stitch being constituted by two first stitches (6a), the first stitches (6a) being two consecutive stitches of the plurality of stitches, in which one of the stitching threads of one of the first stitches (6a) passes through the first strand (2a, 2') and one of the stitching threads of the other of the first stitches (6a) passes through the second strand (2b, 2"); characterized in thatthe fixing zone (4) includes a ligature zone (11) disposed adjacent to the sewing zone (5) along the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2") and formed by a plurality of ligatures realizing the fixing of the first strand (2a, 2') in support of the second strand (2b, 2"), each ligature being constituted by two or three second stitches (6b), the second stitches (6b) being two or three consecutive stitches of the plurality of stitches, in which one of the stitching threads of one of the second stitches (6b) goes around one of the first strand (2a, 2') and the second strand (2b,2") while being in support of an external lateral edge of said one of the first strand (2a, 2') and the second strand (2b,2") gone around;and one of the stitching threads of another of the second stitches (6b) goes around the other of the first strand (2a, 2') and of the second strand (2b,2") resting on an external lateral edge of said other of the first strand (2a, 2') and of the second strand (2b,2") gone around or crosses the other of the first strand (2a, 2') and of the second strand (2b,2").; 2. Attachment device according to claim 1 in which the second stitching points (6b) comprise stitching points going around the first strand (2a, 2') and stitching points going around the second strand (2b, 2").

3. Hanging device according to the preceding claim in which the stitching points around the first strand (2a, 2') and the stitching points around the second strand (2b, 2") are arranged alternately along the longitudinal directions of the stitching threads.

4. Hanging device according to claim 2 wherein the stitching points passing through each other of the first strand (2a, 2') and of the second strand (2b, 2") are stitching points passing through the space between the first strand (2a, 2') and the second strand (2b, 2").

5. Hanging device (1) according to any one of the preceding claims wherein the sewing area (5) and the binding area (11) are formed by the same threads extending continuously from the sewing area (5) to the binding area (11).

6. Attachment device (1) according to any one of the preceding claims comprising an additional ligature zone (11) adjacent to the stitching zone (5), the additional ligature zone (11) and the ligature zone (11) being separated by the stitching zone (5) along the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2").

7. Attachment device (1) according to any one of the preceding claims wherein the first strand (2a, 2') and the second strand (2b, 2") each have a core and a sheath and wherein in the binding area (11), the second stitches (6b) pass through the sheath of the other of the first strand (2a, 2') and the second strand (2b, 2") without passing through the core.

8. Hooking device (1) according to any one of the preceding claims comprising an adjustment device (8) configured to slide along the first strand (2a, 2') to the fixing zone (4) forming an end stop, the binding zone (11) being disposed between the sewing zone (5) and a slide of the adjustment device (8) and the second stitches (6b) going around the second strand (2b, 2").

9. Attachment device (1) according to any one of claims 1 to 6 wherein the first strand (2a, 2') and the second strand (2b, 2") form a loop which is closed by the attachment zone (4) and wherein the binding zone (11) is disposed closer to the loop than the stitching zone (5) along the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2") to oppose the opening of the loop.

10. Attachment device (1) according to any one of claims 1 to 6 wherein the first strand (2a, 2') and the second strand (2b, 2") each have a connector (7) and wherein the ligature zone (11) is disposed closer to the connectors (7) than the stitching zone (5) along the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2") to oppose a separation of the two connectors (7).

11. Lanyard comprising an attachment device (1) according to any one of the preceding claims, the attachment device (1) having a first end having an attachment ring (3) intended to be attached to a user and at least a second end having an anchor point intended to be attached to an anchor.

12. Lanyard according to claim 11 wherein the attachment device depends on claim 8 to form an adjustable lanyard in which the slider (8) forms the anchor point, the slider (8) being movable between a locking position and a sliding position, the adjustment device (8) being fixedly disposed relative to the first strand (2a, 2') in the locking position and being free to move along the first strand (2a, 2') in the sliding position.

13. Lunge according to claim 11comprising a hooking device (1) according to claim 10 and having a second additional end having an additional anchor point intended to attach to an additional anchor and in which the hooking ring (3) is separated from the anchor point and the additional anchor point by the fixing area (4).

14. A method for manufacturing a fastening device (1) according to any one of the preceding claims comprising the following steps: - providing a first strand (2a, 2') and a second strand (2b, 2"); - fixing the first strand (2a, 2') to the contact of the second strand (2b, 2"), the first strand (2a, 2') having a longitudinal direction parallel to a longitudinal direction of the second strand (2b, 2"); wherein the fixing step comprises a sewing step using at least two sewing threads defining first stitches (6a) passing successively through the first strand (2a, 2') and the second strand (2b, 2") to fix the first strand (2a, 2') with the second strand (2b, 2"); characterized in thatprior to or subsequent to the sewing step, the process includes a ligation step which fixes the first strand (2a, 2') against the second strand (2b, 2"), the ligation being formed by at least two threads tied together to define second stitches (6b), each ligation going around at least one of the first strand (2a, 2') and the second strand (2b, 2") and tying to the other of the first strand (2a, 2') and the second strand (2b, 2"), being in contact with an external lateral edge of said one of the first strand (2a, 2') and the second strand (2b, 2") gone around, the ligation zone (11) being disposed adjacent to the sewing zone (5) along the longitudinal directions of the first strand (2a, 2') and the second strand (2b, 2").

15. A manufacturing method according to the preceding claim in which the binding step and the sewing step are carried out using the same sewing machine, the sewing threads extending continuously between the binding step and the sewing step.

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