Manufacturing process of a wear resistant attachment device for a sit harness or roping harness, and attachement device with a strap obtained according to the process

The invention relates to a manufacturing process of a wear resistant attachment device for a sit harness or a roping harness, comprising a joining strap made of flexible synthetic material.

An attachment device used in known manner in roping harnesses is represented in FIG. 10 . The protective sheath G and the positioning strap 10 are formed by two distinct parts. The protective sheath G is achieved either by a tubular strap fitted onto a resistant strap 18 or by a fabric wound round the resistant strap 18 and stitched. The positioning strap 10 then has to be inserted between the sheath G and the resistant strap 18 . Implementation of such an attachment device does not enable optimum protection of the resistant strap 18 to be obtained.

The object of the invention is to achieve a manufacturing process of an attachment device for a sit harness or a roping harness enabling the mechanical assembly strength to be improved and implementation of protection against friction to be simplified.

The process according to the invention is characterized in that:

a first strap is used having an enlarged part bounding joining edges protruding out with respect to the extensions,

the first strap is positioned flat on a second strap or an extension of said first strap,

the edges are folded towards one another through 180° to come into contact with the opposite face of said second strap,

and seams are stitched along the edges to constitute wear resistant overlap parts protecting the opposite edges of the second strap or of the extension against the friction faces.

According to one feature of the invention, the first strap comprises an enlarged part of greater width than the width of each extension.

According to one feature of the invention, the second strap has a width smaller than the width of the enlarged part and greater than or equal to the width of the extensions.

The invention also relates to a wear resistant attachment device for a sit harness or a roping harness obtained according to the process.

Other advantages and features will become more clearly apparent from the following description of an embodiment of the invention given as a non-restrictive example only and represented in the accompanying drawings, in which:

FIG. 1 is an elevational view of the first enlarged strap;

FIGS. 2 and 3 show the two successive stages of assembly of the first strap on the second strap, respectively before and after folding of the protruding edges;

FIG. 4 represents a perspective front view of the assembled attachment device;

FIG. 5 is an identical rear view of the attachment device of FIG. 4;

FIG. 6 is an identical view to FIG. 1 of an alternative embodiment of the first strap;

FIGS. 7 and 8 show two other alternative embodiments of the attachment device;

FIG. 9 illustrates the attachment device of FIG. 8 equipped with a roping ring;

FIG. 10 shows an attachment device according to the prior art.

With reference to FIG. 1, a first joining strap 10 made of flexible synthetic material comprises an enlarged part 12 of width L 1 joined at the opposite ends to extensions 14 , 16 having the same width L 2 as one another. The width L 1 is greater than the width L 2 of each extension 14 , 16 .

In FIGS. 2 and 3, the first strap 10 is applied flat on a second strap 18 having a width L 3 smaller than the width L 1 of the enlarged part 12 and greater than or equal to the width L 2 of the extensions 14 , 16 . The protruding edges 20 , 22 of the enlarged part 12 are folded towards one another through 180° according to the arrows F 1 and F 2 to come into contact with the opposite face of the second strap 18 . Seams 24 are then stitched along the edges 20 , 22 to secure the second strap 18 to the first strap 10 .

It is clear that the second strap 18 can be formed by an extension of the first strap 10 .

FIGS. 4 and 5 show final assembly of the two straps 10 , 18 . The two folded and stitched edges 20 , 22 of the first joining strap 10 improve the mechanical assembly strength and at the same time constitute wear resistant overlap parts protecting the opposite edges of the second strap 18 against friction forces.

The ends of the first strap 10 can be joined to a fixing loop 26 to form an attachment ring 28 secured to the second strap 18 . The assembly process can be implemented for any other attachment element of a sit harness or a roping harness.

In FIG. 6, an alternative embodiment of the first joining strap 100 comprises a succession of sections of different widths. The enlarged part 102 of width L 4 comprises edges 20 , 22 designed to be folded along the lines 120 , 122 aligned with the opposite edges of the adjacent part 104 of width L 5 .

FIG. 7 represents an attachment device 200 comprising the strap 100 one of whose extensions 202 passes through the two rings of a fixing loop 204 of the type described in the document FR-A-2,702,524. The two folded edges 20 , 22 are stitched onto the extension 202 to form the wear resistant overlap parts.

With reference to FIG. 8, the attachment device 210 uses the attachment device 200 of FIG. 7 which is associated to a second fixing loop 206 arranged opposite the first loop 202 . The other extension 208 of the first strap 10 or 100 passes through the second loop 206 , said extension 208 being joined by a stitched seam to the end of the first loop 204 .

In FIG. 9, the attachment device 210 of FIG. 8 is provided with an additional roping ring 212 described in detail in the document FR-A-2,705,609. The roping ring 212 is fitted beforehand on the strap 10 or 100 of FIG. 7 before the second fixing loop 206 is fitted. The two folded edges 20 , 22 of the wear resistant overlap parts protect the attachment device 210 against friction of the roping ring 212 .