Electric wire feeding apparatus

Abstract

The invention provides an electric wire feeding apparatus which can be easily changed at a low cost and without a great design change from the roll feeding type apparatus to the belt feeding type apparatus. In an electric wire feeding apparatus having an electric wire base table ( 21 ), a pair of rotary shafts ( 25, 26 ) arranged in both sides of an electric wire (W) of the electric wire base table ( 21 ), and rotating bodies ( 47 ) fixed to the respective rotary shafts ( 25, 26 ) via attaching and detaching means ( 27 ), there are provided a pair of belt feeding units (C), each having a belt feeding table ( 45 ), a driven pulley ( 46 ) rotatably supported to the belt feeding table ( 45 ), a drive pulley ( 47 ) having a rotational position restricted by the belt feeding table ( 45 ), and a belt ( 48 ) wound between the drive pulley ( 47 ) and the driven pulley ( 46 ). Further, the respective drive pulley ( 47 ) are fixed to the rotary shafts ( 25, 26 ) via the attaching and detaching means ( 27 ), the belt feeding table ( 45 ) in the fixed side is fixed to the electric wire base table ( 21 ) by mounting screws, and the belt feeding table ( 45 ) in the movable side is attached to the electric wire base table ( 21 ) via the connecting rod ( 51 ).

What is claimed is:  
     
         1 . An electric wire feeding apparatus having an electric wire base table in which an electric wire is arranged along a predetermined path line, a pair of rotary shafts arranged in both sides of said electric wire of the electric wire base table, and rotating bodies mounted to the respective rotary shafts via attaching and detaching means in a fixable manner, comprising a pair of belt feeding units, each belt feeding unit comprising: 
 a belt feeding table;    a driven pulley rotatably supported to the belt feeding table;    a drive pulley having a rotational position restricted by said belt feeding table; and    a belt wound between the drive pulley and said driven pulley, wherein    said drive pulley of each of the belt feeding units is fixed to said rotary shaft via said attaching and detaching means, and said pair of belt feeding units are freely attached to said electric wire base table so that each of said belts is positioned at a pressure contact position pressurizing said electric wire.    
     
     
         2 . An electric wire feeding apparatus according to    claim 1   , wherein 
 at least one of said pair of rotary shafts is movably provided, and said belt feeding unit moves together with said moving rotary shaft so as to change between a pressure contact position at which said electric wire is pressurized between both of said belts and a waiting position at which said electric wire is not pressurized between both of said belts.    
     
     
         3 . An electric wire feeding apparatus according to    claim 2   , wherein 
 said belt feeding table is structured such that said belt portion opposing to said electric wire moves parallel in a direction perpendicular to the feed-out direction of said electric wire in the case of moving between the pressure contact position of said belt and the waiting position.    
     
     
         4 . An electric wire feeding apparatus according to    claim 3   , wherein 
 said belt feeding table further comprises:    an arm member swinging and moving said rotary shaft between a close contact position and a waiting position; and    a connecting rod connecting between said belt feeding table and said electric wire base table,    wherein a parallel crank mechanism is constituted by said arm member, said connecting rod, a first imaginary link connecting a connection center in said electric wire base table side of the connecting rod and a swing center of said arm member, and a second imaginary link connecting a connection center in said belt feeding table side of said connecting rod and a rotational center of said rotary shaft, whereby the belt feeding table is moved parallel.    
     
     
         5 . An electric wire feeding apparatus according to    claims 1    to    4   , wherein 
 one of said rotary shafts is movable and another is fixed to a fixed position, and  
 one of said belt feeding units connected to said one rotary shaft is provided so as to freely move between a pressure contact position at which said electric wire is pressurized between both of said belts and a waiting position at which said electric wire is not pressurized.  
 
     
     
         6 . An electric wire feeding apparatus according to    claims 2    to    4   , wherein 
 both of said rotary shafts are movable, and  
 both of said belt feeding units are provided so as to freely move between a pressure contact position at which said electric wire is pressurized between both of said belts and a waiting position at which said electric wire is not pressurized.  
 
     
     
         7 . A belt feeding unit attached to an electric wire base table of an electric wire feeding apparatus, said electric wire base table being arranged along a predetermined path line, and a pair of rotary shafts being arranged in both sides of said electric wire of the electric wire base table, comprising: 
 a belt feeding table;    at least one driven pulley rotatably supported to the belt feeding table;    a drive pulley having a rotational position restricted by said belt feeding table; and    a belt wound between the drive pulley and said driven pulley, wherein    at a time of attaching said belt feeding unit, each of said drive pulleys is fixed to said rotary shaft via said attaching and detaching means, and each of said belts is positioned at a contact position at which said electric wire is pressurized.    
     
     
         8 . A belt feeding unit according to    claim 7   , wherein 
 at least one of said pair of rotary shafts is movably provided, and said belt feeding unit moves together with said moving rotary shaft so as to be changed between a pressure contact position at which said electric wire is pressurized between both of said belts and a waiting position at which said electric wire is not pressurized between both of said belts.    
     
     
         9 . A belt feeding unit according to    claim 8   , wherein 
 said belt feeding table is structured such that a pressure contact surface of said belt opposing to said electric wire is substantially in parallel to the feed-out direction of said electric wire, at an optional position between the pressure contact position and the waiting position of said belt.    
     
     
         10 . A belt feeding unit according to    claim 7   , further comprising: 
 an arm member swinging and moving said rotary shaft between a close contact position and a waiting position; and    a connecting rod connecting between said belt feeding table and said electric wire base table, wherein    a parallel crank mechanism is constituted by said arm member, said connecting rod, a first imaginary link connecting a connection center in said electric wire base table side of the connecting rod and a swing center of said arm member, and a second imaginary link connecting a connection center in said belt feeding table side of said connecting rod and a rotational center of said rotary shaft, whereby the belt feeding table is moved parallel.