Straightener

Abstract

A straightener in which the shape of guide bar facings is simplified and the guide bar facings are effectively used. In the straightener, a clearance (S) opening in a direction orthogonal to a line connecting the axes of straightening rolls ( 12, 14 ) to each other in a plane orthogonal to a carrying route is formed between the vertically opposed straightening rolls ( 12, 14 ). The pair of guide bar facings ( 30, 30 ) guiding a work material (W) are formed in generally rectangular flat plate shapes, and disposed on the inlet side and the outlet side for the work material (W) of both straightening rolls ( 12, 14 ). Also, the guide bar facings ( 30 ) are disposed aslant relative to a carrying face (PL) along the opening direction of the clearance (S) so as not to be interfered with both straightening rolls ( 12, 14 ). The guide faces ( 321 ) of the guide bar facings ( 30 ) are formed such that the guide bar facings ( 30 ) can be linearly moved forward and backward along the opening direction of the clearance (S) relative to the carrying route in the state of facing the carrying route parallel with each other through the clearance (S).

1 . A straightener having a pair of straightening rolls ( 12 ,  14 ) facing each other, one above the other, with a carrying route for a work material (W) in between, provided so as to cross each other at a predetermined angle to the carrying route, and formed in a tsuzumi shape having at least one circumferential surface recessed, and a pair of guide bar facings ( 30 ,  30 ) which are disposed facing each other along the carrying route for the work material (W) so as to intersect an opposing direction of the straightening rolls ( 12 ,  14 ) and guide the work material (W), with a clearance (S) formed between both straightening rolls ( 12 ,  14 ) and opening in a direction orthogonal to a line connecting axes of the straightening rolls ( 12 ,  14 ) to each other in a plane orthogonal to the carrying route, characterized in that 
 the pair of guide bar facings ( 30 ,  30 ) are each formed in an approximately rectangular flat plate and are respectively provided at an inlet-side area and an outlet-side area of both straightening rolls ( 12 ,  14 ) for the work material (W),    each of the guide bar facings ( 30 ) is disposed askew to a horizontal carrying face (PL) of the work material (W) along an opening direction of the clearance (S) so as not to interfere with both straightening rolls ( 12 ,  14 ), and    guide faces ( 32 ) of the guide bar facings ( 30 ) for the work material (W) are formed in such a way that the guide bar facings ( 30 ) are linearly movable forward and backward along the opening direction of the clearance (S) relative to the carrying route in a state where the guide faces ( 32 ) face the carrying route in parallel to each other through the clearance (S).    
   
   
       2 . The straightener according to  claim 1 , wherein a layout angle (θ) of the guide bar facings ( 30 ) to the carrying face (PL) is set in a range of ±10 to ±20°.  
   
   
       3 . The straightener according to  claim 1  or  2 , wherein the guide face ( 32 ) of one of the guide bar facings ( 30 ) which corresponds to a direction of movement caused by twisting of the work material (W) is formed wider along the carrying route than the guide face ( 32 ) of the other paired guide bar facing ( 30 ).  
   
   
       4 . The straightener according to  claim 1  or  2 , wherein each of the guide bar facings ( 30 ) is coupled via a guide bar ( 34 ) to a forward/backward moving mechanism ( 40 ) which has a whirl-stop mechanism ( 54 ,  56 ) so that when the guide bar facing ( 30 ) is moved forward and backward along the opening direction of the clearance (S) by the forward/backward moving mechanism ( 40 ), the guide bar facing ( 30 ) is prevented from rotating in relative to the carrying route.  
   
   
       5 . The straightener according to  claim 3 , wherein each of the guide bar facings ( 30 ) is coupled via a guide bar ( 34 ) to a forward/backward moving mechanism ( 40 ) which has a whirl-stop mechanism ( 54 ,  56 ) so that when the guide bar facing ( 30 ) is moved forward and backward along the opening direction of the clearance (S) by the forward/backward moving mechanism ( 40 ), the guide bar facing ( 30 ) is prevented from rotating in relative to the carrying route.