Spring manufacturing apparatus

A spring manufacturing apparatus for manufacturing a spring by feeding a wire, to be formed into a spring, from an end portion of a wire guide, and forcefully bending, winding, or coiling the wire by tools in a spring forming space near the end of the wire guide, said spring manufacturing apparatus comprising:

• wire feed means for feeding the wire toward the spring forming space by gripping the wire with a pair of rollers and rotating the rollers;
• and
• revolving means for twisting the wire by revolving the rollers and changing a direction of the wire fed from the wire guide, while gripping the wire with the rollers which are supported so as to be revolvable around the wire axis line,
• wherein said revolving means is fixed to a hollow gear, having a same rotation axis as the wire axis line, with an offset to a side, and revolves while allowing the rollers to rotate by a gear train meshing with the hollow gear, and
• said rollers are driven by the gear train including:
• a first bevel gear which penetrates through a hollow axis of the hollow gear and has a same rotation axis as the wire axis line;
• a second bevel gear which meshes with said first bevel gear and has a rotation axis forming an angle of about 90.degree. with a rotation axis of said first bevel gear;
• a first spur gear having the same rotation axis as said second bevel gear;
• and
• a second spur gear which meshes with said first spur gear and is axially fixed to rotation axes of the rollers.