E - Fixed Constructions – 06 – C
Patent
E - Fixed Constructions
06
C
E06C 7/08 (2006.01) E06C 1/02 (2006.01) E06C 7/50 (2006.01)
Patent
CA 2695028
A ladder comprises two stiles and at least a step unit mounted between the two stiles. The step unit includes a hollow step, an inner sleeve and an outer sleeve. The inner sleeve is fit into the hollow step, at an end of which a position restriction portion is located to prevent the inner sleeve from moving out, and the outer sleeve is adapted to surround the end of the hollow step. Besides, a fastener is set, the fastening end of which is passed through the stile, the outer sleeve and fastened in the inner sleeve. The present technique solution has a high supporting strength and a high shear resistance.
La présente invention concerne une échelle comprenant deux montants (10) et au moins une unité marche (20) installée entre les deux montants (10). L'unité marche (20) comprend une marche creuse (21), un manchon interne (23) et un manchon externe (25). le manchon interne (23) se loge dans la marche creuse (21) à une extrémité de laquelle une partie de limitation de la position (22) se situe pour empêcher le manchon interne (23) de sortir à l'extérieur et le manchon externe (25) est conçu pour entourer l'extrémité de la marche creuse (21). En outre, une fixation (27) est mise en place, l'extrémité de fixation de cette dernière traversant le montant (10), le manchon externe (25) et étant fixée dans le manchon interne (23).
Gowling Lafleur Henderson Llp
Leng Luhao
LandOfFree
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