Fall arrest support

A - Human Necessities – 62 – B

Patent

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Details

A62B 35/04 (2006.01)

Patent

CA 2589509

A fall arrest system has a top anchorage bracket (1), a bottom anchorage bracket (2) and a cable (3) between the brackets. Fixture ends (12, 22) of the brackets carry bosses (13, 23) in their bottom and top edges (14, 24) respectively. Cable tension pulls the distal ends of the brackets towards each other about the bolts B and the bosses react with the corner of the pylon. The bracket end (15) is dimensioned such that in the event of a fall and loading of the cable, the bracket (1) deforms plastically, peeling away from the face F. The bottom anchorage bracket (2) has an arm (25) with a bore for a clamp bolt (31), carrying a load transfer bracket (32) and a clamp nut (34). The bolt is engaged in a slot (35) in a slotted limb (36) of the bracket (32). Above the limb, the load transfer bracket (32) is integrally connected via a thin tongue (37) to a sleeve (38) locating the end of the cable. The cable (3) extends through the sleeve to a swaged on collar (40). A tensioning device is used to draw down the limb (36) and tension the cable, whereupon the brackets (2) and (32) are clamped together.

L'invention porte sur un système anti-chute qui comporte un support d'ancrage supérieur (1), un support d'ancrage inférieur (2) et un câble placé entre les supports. Les extrémités de fixation (12, 22) des supports supportent des parties renflées (13, 23) dans leurs bords inférieur et supérieur (14, 24). La tension du câble tire les extrémités distales des supports les unes vers les autres autour des boulons B et les parties renflées réagissent à l'angle du pylône. L'extrémité (15) du support est dimensionnée de sorte qu'en cas de chute et de chargement du câble, le support (1) se déforme plastiquement, se décollant de la face F. Le support d'ancrage inférieur (2) possède un bras (25) pourvu d'un trou destiné à un boulon de serrage (31) de façon à supporter un support de transfert de charge (32) et un écrou de serrage (34). Le boulon est engagé dans une fente (35) dans un cadrant fendu (36) du support (32). Au-dessus du cadrant, le support de transfert de charge (32) est totalement raccordé par une mince languette (37) à un manchon (30) se trouvant à l'extrémité du câble. Le câble (3) s'étend dans le manchon jusqu'à un collier embouti (40). Un dispositif de tensionnement est utilisé pour tirer le cadrant vers le bas et tendre le câble, ce qui permet de réunir et serrer les supports (2 et 32).

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