Patent ID: 6923034
Filing Date: 2005-08-02
Classification: B21F

Abstract:
1. A wire spring forming apparatus, comprising: a quill configured to guide a wire; a plurality of forming tools radially arranged around an axis of the quill and are movable forward and backward perpendicular to or substantially perpendicular to an axis of the quill; a plurality of pressure feed rollers, consisting of a plurality of first pressure feed rollers and a plurality of second pressure feed rollers, configured to hold and pressure the wire based on a rotation of the feed rollers, and the pressure feed rollers are configured to revolve around an axis of the wire while holding the wire to be pressure fed between the pressure feed rollers, wherein the first pressure feed rollers and a power transmitting means for transmitting a drive force to the first pressure feed rollers are mounted to a main portion main frame of a revolving means supported to a main body frame rotatably or are mounted to position adjusting arms swingably supported to the main portion main frame; the second pressure feed rollers are mounted to supporting arms on two sides swingably attached to a fulcrum shaft that is rotatably supported to the main portion main frame perpendicular to the wire pressure feeding direction, so that gears for driving the pressure feed rollers arranged neighbouring the respective pressure feed rollers are engaged with each other; each pressure feed roller is positioned at a middle or a substantially middle of a spindle having both ends supported or pivoted to the main portion main frame or the position adjusting arms and the supporting arms, respectively; and a point of application of pressure on each supporting arm is positioned immediately or substantially immediately above the second pressure feed rollers.