Twisting apparatus of electric wires

Abstract

A twisting apparatus of electric wires includes a first holding unit ( 1 ) for holding first ends of a pair of electric wires (W 1, W 2 ), a second holding unit ( 2 ) for holding second ends of the electric wires (W 1, W 2 ), and a twist drive unit ( 4 ) for rotating the first holding unit ( 1 ) to twist the electric wires (W 1, W 2 ). The second holding unit ( 2 ) includes a pair of support members ( 27 ) that rotate together with the first ends of the electric wires (W 1, W 2 ), and a rotary synchronous mechanism ( 28 ) that rotates both support members ( 27 ) at the same speed and in the same direction by transmitting a rotary force from the one support member ( 27 ) to the other support member ( 27 ) when the one support member ( 27 ) rotates.

What is claimed is:  
     
         1 . A twisting apparatus of electric wires comprising: 
 a first holding unit ( 1 ) for holding first ends of a pair of electric wires (W 1 ; W 2 );    a second holding unit ( 2 ) for holding second ends of said electric wires (W 1 ; W 2 ); and    a twist drive unit ( 4 ) for rotating said first holding unit ( 1 ) to twist said electric wires (W 1 ; W 2 );    said second holding unit ( 2 ) including: 
 a pair of supports ( 27 ) that rotate together with said first ends of said electric wires (W 1 ; W 2 ); and  
 a rotary synchronous mechanism ( 28 ) that rotates both supports ( 27 ) at the same speed and in the same direction by transmitting a rotary force from the one support ( 27 ) to the other support ( 27 ) when the one support ( 27 ) rotates.  
   
     
     
         2 . The twisting apparatus of electric wires of  claim 1 , wherein said second holding unit ( 2 ) has a biasing member ( 29 ) for biasing both of said supports ( 27 ) in directions in which said electric wires (W 1 ; W 2 ) are subject to tension stresses.  
     
     
         3 . A twisting apparatus of electric wires comprising: 
 a first holding unit ( 1 ) for holding first ends of a pair of electric wires (W 1 ; W 2 );    a second holding unit ( 2 ) for rotatably holding second ends of said electric wires (W 1 ; W 2 );    a twist drive unit ( 4 ) for rotating said first holding unit ( 1 ) to twist said electric wires (W 1 ; W 2 );    a third holding unit ( 3 ) disposed between said first and second holding units ( 1 ;  2 ) for holding said electric wires (W 1 ; W 2 ) with each of said electric wires (W 1 ; W 2 ) being allowed to rotate but being restricted from rotating together with the other of the electric wires (W 1 ; W 2 ) upon rotation of said first holding unit ( 1 );    a slide drive unit ( 60 ) for moving said third holding unit ( 3 ) from a start position adjacent said first holding unit ( 1 ) to an end position adjacent said second holding unit ( 2 ); and    control means ( 64 ) for controlling said slide drive unit ( 60 ) to move said third holding unit ( 3 ) at a speed corresponding to a rotary speed of said first holding unit ( 1 ).    
     
     
         4 . The twisting apparatus of electric wires of  claim 3 , wherein said second holding unit ( 2 ) includes first and second supports ( 27 ) that rotate together with said first ends of said electric wires (W 1 ; W 2 ); and a rotary synchronous mechanism ( 28 ) that rotates both said supports ( 27 ) at a uniform speed and in the same direction by transmitting a rotary force from the first support ( 27 ) to the second support ( 27 ) when the first support ( 27 ) rotates.  
     
     
         5 . The twisting apparatus of electric wires of  claim 4 , wherein said second holding unit ( 2 ) is provided with a biasing member ( 29 ) for biasing said both supports ( 27 ) in directions in which said electric wires (W 1 ; W 2 ) are subject to tension stresses.