Wire tying tool with drive mechanism

摘要

A wire tying tool having a set of movable talons for channeling a loop of hard wire around a rebar joint or other object(s) to be tied with a wire knot at high speed; a heavy duty wire drive with a pullback feature to retract the loop under tension to tighten the loop around the joint; a clutch-controlled retractable reel to hold the tension on the hard wire on the reel; a spinner/cutter that extrudes a knot by turning, kinking, and cutting the wire (holding the cut ends under tension) and then spinning in complete revolutions to twist the wire into a knot while drawing the spinner away from the work surface. In a preferred embodiment a single reversible motor powers each of a wire drive, a talon drive and a spinner drive; logic and control elements control a sequence of operations of the various drives.