Patent ID: 6484759
Filing Date: 2002-11-26
Classification: B21F

Abstract:
A coil spring knotting machine comprising:a frame; a support arm mounted on said frame for movement between a knot-tying position and a retracted position; a first shaft rotatably mounted on said frame about an axis fixed relative to said frame; a mechanism movably mounted on said frame and operably connected to said first shaft and to said support arm for displacing said support arm between said knot-tying and retracted positions in response to rotation of said first shaft; a first drive member rotatably drivingly connected to said first shaft to selectively effect rotation thereof; a knot-tying member rotatably mounted on said support arm; a second shaft supported by said support arm for rotation about an axis fixed relative to said support arm and movable relative to said frame, said second shaft being drivingly connected to said knot-tying member to effect rotation thereof in response to rotation of said second shaft; a rotating member coupled to said first shaft; a second drive member drivingly connected to said rotating member to effect rotation thereof; a linkage drivingly connected between said rotating member and said second shaft for rotating said knot-tying member in response to rotation of said rotating member, notwithstanding movement of said support arm between said knot-tying and retracted positions; and an electronic control unit connected to said first and second drive members to cyclically rotate said first shaft so as to displace said support arm between said knot-tying and retracted positions and to cyclically rotate said second shaft so as to rotate said knot-tying member when said support arm is in said knot-tying position.