Desenvolvimento de um mecanismo para portas deslizantes com sistema anti-descarrilamento

Abstract

The furniture industry is having good results, even during the last economic crisis in Brazil. Following the design trends and the frequent search for space optimization, sliding door has become an increasingly used furniture. On the other hand, the derailment of the bottom caster from the surface where it slides is a usual problem during the door use. Two companies have already proposed a solution for this issue: one uses a pair of helical springs, while the other uses a mechanism similar to a leaf spring. Both models were patented, what makes those companies operate in an expressive way in the market, due to their products functionality. This paper proposes alternatives to this sliding door mechanisms using magnets repelling itselves as a potential energy source. Other alternatives are presented as design concepts, based on academic research and orientation during this paper development. The proposal accomplishment passed through an analyze of the actual mechanisms, study of the movement of a sliding door, tests of materials and elements to be used in the final product; as well as the development of a prototype and a test bench with conditions that force the derailment to evaluate the proposed product and the market casters, verifying if they meet the main requirement: avoid the derailment of a furniture sliding door. Finally, it was observed that the parameters of velocity and vertical displacement of the caster were the most important for this kind of product, where for each smaller magnet pair tested the velocity is 2,72 m/s, whereas the project required at least 1,60 m/s. The results for the prototype were satisfactory for this paper objective (sic).