FALL ARREST AND LOAD DISTRIBUTION HARNESS AND A METHOD FOR MANUFACTURING SAID HARNESS

Abstract

A harness includes a belt and two separate thigh loops, in which at least one element selected from the belt and the thigh loops includes a first lower support strip to which at least, firstly, a first portion of an open coil and, secondly, a first upper cover strip are bonded. The at least first portion of the open coil is positioned between the lower support strip and the upper cover strip, the open coil having a single structural yarn wound on itself to form a number of yarn turns. The number of yarn turns of being greater than or equal to two, the two ends of the single structural yarn being independent of each other, the yarn turns of the open coil making it possible to distribute the tensile forces exerted on the single yarn in wound form.

Claims

1. A harness comprising: a belt and two distinct leg loops, wherein at least one element selected from among the belt and the leg loops comprises a first lower support strip onto which are bonded at least a first portion of an open coil on the one hand and a first upper overlay strip on the other hand so that said at least first portion of the open coil is interposed between the lower support strip and the upper overlay strip, said open coil including a unique structural yarn wound on itself to form a plurality of yarn turns, wherein the number of yarn turns of said plurality of yarn turns is greater than or equal to two, the two ends of the unique structural yarn being independent of each other, the yarn turns of said open coil allowing distributing the tensile forces exerted on the wound unique yarn.

2. The harness according to claim 1, wherein the yarn turns of the plurality of yarn turns are spaced apart so as to be disposed parallel to one another in a direction substantially parallel to a longitudinal axis of the first lower support strip.

3. The harness according to claim 1, wherein over at least one portion of the open coil length, the open coil has at least a first area where the yarn turns are distant from one another according to a first mean interval and at least one second area where the yarn turns are distant from one another according to a second mean interval strictly larger than the first mean interval, in in a transverse axis of the first support strip, the open coil having a constriction at the level of the first area.

4. The harness according to claim 1, wherein the first upper overlay strip covers the entirety of the first lower support strip.

5. The harness according to claim 1, wherein the first upper overlay strip covers a first portion of the first lower support strip and wherein a second portion of the first lower support strip is not covered by the first upper overlay strip.

6. The harness according to claim 1, wherein one of the two leg loops comprising the first lower support strip and the first upper overlay strip, the other leg loop comprises a second lower support strip onto which is bonded at least a second portion of said open coil, distinct from the first portion, on the one hand and a second upper overlay strip distinct from the first upper overlay strip on the other hand, said first and second lower support strips being disposed equidistant from one another, said open coil passing through a bridge connecting the belt to the leg loops, the first and second upper overlay strips being disposed on either side of said bridge.

7. A method of manufacturing a harness according to claim 1, said method including the following steps: a) winding of a unique structural yarn on itself in order to form an open coil where both ends of the structural yarn are independent of each other, winding of the structural yarn being carried out around supports such that the open coil includes a plurality of yarn turns, the number of yarn turns of said plurality of yarn turns being greater than or equal to two, b) depositing of at least one first portion of the open coil over a first lower support strip, and c) bonding of a first upper overlay strip onto said first lower support strip over which said at least one first portion of the open coil is deposited so that said at least one first portion of the open coil is interposed between the lower support strip and the upper overlay strip.

8. The manufacturing method according to claim 7, including a shaping step, whereby said yarn turns of the open coil are spaced apart such that spacing the yarn turns of the plurality of yarn turns from one another so as to be disposed parallel to one another in a direction substantially parallel to a longitudinal axis of the first lower support strip.

9. The manufacturing method according to claim 8, wherein the shaping step is implemented during step a) and is carried out so that the supports allow separating said yarn turns from the open coil.

10. The manufacturing method according to claim 8, wherein the shaping step is implemented between steps a) and b) and is carried out so that at least one spacer element allowing separating said yarn turns is placed on the open coil.

11. The manufacturing method according to claim 10, comprising a step of removing the spacer element, implemented after step b).

12. The manufacturing method according to claim 7, further including a tightening step whereby the open coil is at least partially tightened at least at a first area of its the open coil length, the tightening step being implemented in step a) or between steps a) and b).

13. The manufacturing method according to claim 12, wherein during the tightening step, the open coil is at least partially tightened along a transverse axis oriented transversely to the first lower support strip.

14. The manufacturing method according to claim 7, comprising a step of preserving the shape of the coil implemented after step a).

15. The manufacturing method according to claim 7, wherein during step c), the bonding is performed at cold temperature or by heat-bonding.

16. The manufacturing method according to claim 7, wherein to form a pair of leg loops for the harness, step c) comprises bonding a second upper overlay strip onto a second lower support strip over which at least one second portion of the open coil is deposited.

17. The manufacturing method according to claim 7, wherein to form a belt for the harness, the entirety of the open coil is deposited, in step b), over the first lower support strip.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other aspects, aims, advantages and features of the disclosure will appear better upon reading the following detailed description of preferred embodiments thereof, provided as a non-limiting example, and with reference to the appended drawings wherein:

[0050] FIG. 1 illustrates an example of a harness according to the disclosure;

[0051] FIG. 2 illustrates an example of a method for manufacturing a harness comprising a pair of leg loops according to the disclosure;

[0052] FIG. 3 illustrates an example of a method for manufacturing a harness comprising a belt according to the disclosure; and

[0053] FIG. 4 illustrates an example of a method for manufacturing a harness comprising a pair of leg loops according to the disclosure.

DETAILED DESCRIPTION OF THE DRAWINGS

[0054] FIG. 1 illustrates a harness 1 comprising a belt 2 and two leg loops 3. In this example, each of the belt 2 and one of the two leg loops 3 comprises a first lower support strip 41 onto which is bonded at least a first portion P1 of an open coil 5 and a first upper overlay strip 61, said open coil 5 including a unique structural yarn wound on itself to form a plurality of yarn turns, the two ends of the unique structural yarn being independent of each other, i.e. not connected to each other. As regards the belt 2 and the leg loop 3, the corresponding open coil 5 may for example comprise at least thirty yarn turns in order to distribute the tensile forces exerted on the wound structural yarn.

[0055] In this example, each open coil 5 comprises at least thirty yarn turns spaced apart from one another so as to be disposed parallel to one another according to a direction substantially parallel to a longitudinal axis L of the corresponding first support strip 41.

[0056] The second leg loop may comprise a second lower support strip 42 onto which at least one second portion P2 of the open coil 5 is bonded and a second upper strip 62, said first and second lower support strips 41, 42 being disposed equidistant from one another. The coil 5 can pass through a bridge 7 connecting the belt 2 to the leg loops 3, the first and second upper overlay strips 61, 62 being disposed on either side of the bridge 7.

[0057] A binding member 8 may connect, independently of each other, the first and second lower support strips 41, 42 so as to form a continuous circle.

[0058] The coil 5 may be surrounded by a protective film 9.

[0059] FIG. 2 illustrates an example of a method for manufacturing a harness comprising two leg loops 3, comprising a step a) including winding a unique structural yarn on itself in order to form an open coil 5 where the two ends are independent of each other, winding of the yarn being carried out around supports 20 having an elongated shape in such a manner that the open coil 5 includes a plurality of yarn turns, the number of yarn turns of said plurality being greater than or equal to 2.

[0060] In a shaping step, eight spacers 21 are placed at some locations of the open coil 5 to space the yarn turns of the coil 5 apart in a manner spacing the yarn turns of the plurality from one another so as to be disposed parallel to one another according a direction substantially parallel to the longitudinal axis L of the first lower support strip 41.

[0061] To hold the coil 5 in the particular shape illustrated in FIG. 2, in a glue application step, glue points may be applied over the open coil 5.

[0062] Afterwards, a first portion of the coil P1 is deposited over the first lower support strip 41 and a second portion P2 is deposited over the second lower support strip 42.

[0063] Afterwards, the spacers 21 are removed.

[0064] In a step c), the first and second upper strips 61, 62 are for example heat-bonded onto said first and second lower support strips 41, 42 over which are deposited at least the first portion P1 and the second portion P2 of the open coil 5. To this end, for example, the faces of the upper strips 61, 62 intended to be in contact with said at least one first portion P1 of the coil 5 are pre-coated with a polymer.

[0065] In this example, the first upper strip 61 covers the entirety of the first lower support strip 41. Moreover, the places where the coil 5 is at least partially tightened are not covered by the first upper strip 61 or the second upper strip 62.

[0066] Two leg loops 3 are then obtained. The open coil 5 could subsequently be inserted into the bridge 7 connecting the belt 2 to obtain a harness 1 as illustrated in FIG. 1.

[0067] FIG. 3 illustrates an example of a method for manufacturing a harness according to the disclosure comprising a step a) including winding of a unique structured yarn on itself in order to form an open coil 5 where the two ends are independent of each other, winding of the yarn being carried out around supports 20 having an elongated shape in such a manner that the open coil 5 includes a plurality of yarn turns, the number of yarn turns of said plurality being greater than or equal to 2.

[0068] In a shaping step, six spacers 21 are placed at some locations of the coil in order to space the yarn turns of the open coil 5 apart in a manner spacing the yarn turns from one another so as to be disposed parallel to one another according to a direction substantially parallel to a longitudinal axis L of the first lower support strip 41.

[0069] In a tightening step, the coil 5 may be partially tightened along a transverse axis T oriented transversely to the first lower support strip 41 with a clamp, an adhesive tape, a yarn or a cord 22.

[0070] To hold the coil 5 in the particular shape illustrated in FIG. 3, in a glue point application step, glue points may be applied over the coil 5.

[0071] Afterwards, a first portion P1 of the coil 5 is deposited over the first lower support strip 41.

[0072] Afterwards, the spacers 21 are removed. For example, the spacers are combs or clamps.

[0073] In a step c), the first upper strip 61 is for example heat-bonded onto said first lower support strip 41 over which at least the first portion P1 of the coil 5 is deposited. To this end, for example, the face of the first upper strip 61 intended to be in contact with said at least one first portion P1 of the coil 5 is pre-coated with a polymer.

[0074] In this example, the first upper strip 61 covers a portion of the first lower support strip 41. Moreover, the places where the coil 5 is at least partially tightened are not covered by the first upper strip 61.

[0075] A belt 2 is then obtained. It could subsequently be connected to the bridge 7 also connecting two leg loops 3 to obtain a harness 1 as illustrated in FIG. 1.

[0076] FIG. 4 illustrates an example of a method for manufacturing a harness comprising two leg loops 3, comprising a step a) including winding of a unique structural yarn on itself in order to form an open coil 5 where the two ends are independent of each other, winding of the yarn being carried out around supports 20 having an elongated shape in such a manner that the open coil 5 includes a plurality of yarn turns, the number of yarn turns of said plurality being greater than or equal to 2. For example, a device 30 unwinds the yarn around the supports 20 so as to form the coil 5.

[0077] In this example, a shaping step is carried out during step a), in which said yarn turns of the open coil 5 are spaced apart so as to space the yarn turns of the plurality from one another so as to be disposed parallel to one another according to a direction substantially parallel to a longitudinal axis L of the first lower support strip 41. In this step, the supports 20 allow spacing said yarn turns apart from the open coil 5. Thus, the supports 20 also serve as spacers.

[0078] To hold the coil 5 in the particular shape illustrated in FIG. 4, in a step of preserving the shape of the coil, glue points may be applied on the open coil 5.

[0079] In a tightening step, the coil 5 may be partially tightened along a transverse axis T oriented transversely to the first lower support strip 41 with a clamp, an adhesive tape, a yarn or a cord 22.

[0080] Afterwards, a first portion of the coil P1 is deposited over the first support strip 41 and a second portion P2 is deposited over the second lower support strip 42.

[0081] In a step c), the first and second upper strips 61, 62 are for example heat-bonded onto said first and second lower support strips 41, 42 over which are deposited at least the first portion P1 and the second portion P2 of the open coil 5. To this end, for example, the faces of the lower strips 41, 42 intended to be in contact with said at least one first portion P1 of the coil 5 are pre-coated with a polymer.

[0082] In this example, the first upper strip 61 covers the entirety of the first lower support strip 41. Moreover, the places where the coil 5 is at least partially tightened are not covered by the first upper strip 61 or the second upper strip 62.

[0083] Two leg loops 3 are then obtained. The open coil 5 could subsequently be inserted into the bridge 7 connecting the belt 2 to obtain a harness 1 as illustrated in FIG. 1.

[0084] The harness 1 according to the disclosure allows solving the drawbacks of the prior art by proposing an architecture that is simple, comfortable and safe for the user in all circumstances and that offers excellent distribution of tensile forces in order to guarantee optimum safety for the users.