Wire feeding unit and wire bending apparatus including the same

Abstract

A wire feeding unit includes a pair of wire feeding portions, wherein each of the wire feeding portions includes a driving roller which is driven by rotation power, a belt which is connected to the driving roller to rotate and is brought into contact with a wire while being rotated, at least one driven rollers which are rotated by being coupled with the driving roller by the belt, and a guide portion which is placed to pressurize the belt to one side and guides a position of the belt such that the wire is moved by the belt, wherein the pair of wire feeding portions are symmetrically disposed and one of the guide portions is disposed to face the one side of the other.

What is claimed is: 
     
         1 . A wire feeding unit comprising:
 a pair of wire feeding portions,   wherein each of the pair of wire feeding portions comprises   a driving roller which is driven by rotation power,   a belt which is connected to the driving roller to rotate and is brought into contact with a wire while being rotated,   at least one driven rollers which is rotated by being interlocked with the driving roller by the belt, and   a guide portion which is placed to pressurize the belt to one side and guides a position of the belt such that the wire is moved by the belt,   wherein the pair of wire feeding portions are symmetrically disposed, and one of the guide portions is disposed to face the one side of the other.   
     
     
         2 . The wire feeding unit of  claim 1 , wherein at least one driven rollers include a first driven roller and a second driven roller and the guide portion is interposed between the first driven roller and the second driven roller and pressurizes the belt. 
     
     
         3 . The wire feeding unit of  claim 1 , wherein the guide portion is disposed projectedly of at least one driven rollers toward the one side such that the belt between the driving roller and at least one driven rollers is pulled. 
     
     
         4 . The wire feeding unit of  claim 2 , wherein the guide portion is disposed projectedly of the first driven roller and the second driven roller, toward the one side such that the belt between the first driven roller and the second driven roller is pulled. 
     
     
         5 . The wire feeding unit of  claim 1 , wherein the belt is coupled and driven with the driving roller and the driven roller by tooth engagement. 
     
     
         6 . A wire bending apparatus comprising:
 a straightener into which a wire is fed;   a pair of wire feeding portions which transfer the wire passing through the straightener; and   a head portion which bends the wire while drawing out the wire transferred from the wire feeding portions,   wherein each of the pair of wire feeding portions comprises   a driving roller which is driven by rotation power,   a belt which is connected to the driving roller to rotate and is brought into contact with a wire while being rotated,   at least one driven rollers which are rotated by being coupled with the driving roller by the belt, and   a guide portion which is placed to pressurize the belt to one side and guides a position of the belt such that the wire is moved by the belt,   wherein the pair of wire feeding portions are symmetrically disposed, and one of the guide portions is disposed to face the one side of the other.