Apparatus for binding objects together

E - Fixed Constructions – 04 – G

Patent

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Details

E04G 21/12 (2006.01)

Patent

CA 2625483

An apparatus for tying a wire (46, 52) around one or more objects such as concrete reinforcing bars (2) is disclosed. It comprises means for passing the wire (46, 52) in a loop around the bars and a rotatable head 4 for twisting the ends of the loop together. The head (4) has at least one gripping means such as a variable force clutch (32) for gripping the wire, the gripping means being adapted to provide a variable gripping force so as to apply a predetermined tension to the wire during at least a first phase of twisting. Also disclosed is pre-feeding the wire between tying operations; conditioning the surface of the wire; and using the electrical conductivity of the reinforcing bars to verify that the bars are present before tying.

L'invention concerne un appareil destiné à attacher un câble (46, 52) autour d'un ou plusieurs objets tels que des barres de renfort (2). Cet appareil comprend un moyen destiné à faire passer le câble (46, 52) dans une boucle autour des barres et une tête rotative (4) destinée à tordre les extrémités de la boucle ensemble. La tête (4) comprend au moins un moyen de préhension tel qu'un embrayage à force variable (32) destiné à assurer la préhension du câble, ce moyen de préhension étant conçu pour produire une force de préhension variable en vue de l'application d'une tension prédéterminée sur le câble pendant au moins une première phase de torsion. L'invention concerne également le pré-acheminement du câble entre des opérations d'attache, le conditionnement de la surface du câble et l'utilisation de la conductivité électrique des barres de renfort pour vérifier si les barres sont présentes avant une opération d'attache.

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