Knuckle for welding of safety hand railings

E - Fixed Constructions – 04 – F

Patent

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Details

E04F 11/18 (2006.01) B23K 33/00 (2006.01) E04C 3/06 (2006.01) F16L 9/00 (2006.01) F16L 23/14 (2006.01) E04C 3/04 (2006.01)

Patent

CA 2130048

Instead of creating hand railings by joining together sections of rectangular hollow tubing using mitre cuts and welding of the abutting cut ends, a metal knuckle is welded to the straight ends of such tubing. The knuckle has a body with a rectangular cross-section and in profile a circular sector with an included angle less than 180°. Each end of the knuckle is formed as a pyramidal frustum that is adapted to enter the straight end of the tubing. A notch of generally triangular cross-section is created to hold welding bead between an end of the tubing and a respective frustum end of the knuckle. The notch size increases with the thickness of tubing inserted over the frustum end, and filling the notch with welding bead will automatically increase the joint strength as tubing thickness increases.

Au lieu de former des mains courantes en joignant des sections de tube rectangulaires grâce à des coupes d'onglet et en soudant bout à bout les extrémités coupées, un embout métallique est soudé aux extrémités droites du tube. L'embout possède un corps à section transversale rectangulaire et en profil, un secteur circulaire dont l'angle inclus est inférieur à 180 degrés. Chaque extrémité de l'embout est formée d'une pyramide tronquée conçue pour entrer dans l'extrémité droite du tube. Une entaille de section génralement triangulaire est pratiquée pour retenir le cordon de soudure entre une extrémité du tube et l'extrémité correspondante de la pyramide tronquée de l'embout. La taille de l'encoche augmente avec l'épaisseur du tube inséré sur l'extrémité de la pyramide tronquée, et le fait de remplir l'encoche avec le cordon de soudure augmentera automatiquement la résistance du joint au fur et à mesure que l'épaisseur du tube s'accroît.

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