Device for the bending of springs for spring interior...

B - Operations – Transporting – 21 – F

Patent

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Details

B21F 35/00 (2006.01)

Patent

CA 2250172

The invention relates to a device for the manufacture of elastic springs for spring interior mattresses, vehicle cushions, cushions and the like. The springs are constructed from a row of continuous, spiral shaped parts arranged after each other. The device comprises a feeding tool (18) for the spring wire (6), a bending tool (20) for the wire adjustable in a plane essentially perpendicular to the feed direction of the wire, and a spring shaping tool (21), which can consist of two parallel plates between which the wire runs during the manufacturing of the spiral shaped parts (Figure 1) of the elastic spring and which are turnable for the adjustment of the slope angle of the spring part. At least one gear transmission (22), which especially can be a planetary transmission, is arranged for the adjustment of said spring shaping tool (21) in predetermined rotational positions. The adjustment tools (21, 42) are arranged for on the one hand the adjustment of the angular position of the bending tool (20), on the other hand for the performance of the predetermined bending operations.

L'invention concerne un dispositif permettant de fabriquer des ressorts élastiques pour des matelas, des coussins de véhicules, des coussins et équivalent. Les ressorts sont fabriqués à partir d'une rangée de parties spiralées continues, disposées l'une derrière l'autre. Le dispositif comprend un outil d'alimentation (18) amenant le fil (6), un outil à cintrer (20) le fil, cet outil à cintrer étant réglable dans un plan essentiellement perpendiculaire à la direction d'alimentation en fil, et enfin un outil de mise en forme (21) du ressort. Cet outil de mise en forme peut se présenter sous la forme de deux plaques parallèles entre lesquelles passe le fil pendant la fabrication des parties spiralées (fig.1) du ressort élastique. Ces plaques peuvent pivoter, ce qui permet d'ajuster l'angle d'inclinaison des parties spiralées. Au moins une transmission par roue dentée (22), notamment une transmission à engrenages planétaires, permet d'ajuster l'outil de mise en forme (21) du ressort dans les positions de rotation déterminées. Les outils d'ajustement (21, 42) sont conçus, d'une part, pour régler la position angulaire de l'outil à cintrer (20) et, d'autre part, pour améliorer les performances des opérations de cintrage déterminées.

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