Peripheral length correction device, peripheral length measurement device and surface defect inspection device

Abstract

A peripheral length correction device with a metal ring wrapped around a pair rollers of a rotating driver side and a follower side, wherein, while regulating the separation distance of the pair of rollers and exerting a predetermined tension to the metal ring, corrects the metal ring peripheral length by strengthening the predetermined tension; a peripheral length measurement device which measures the separation distance to provide a measurement value and calculates the metal ring peripheral length from the measurement value; and a surface defect inspection device, wherein, while regulating the separation distance of the pair of rollers and exerting the predetermined tension to the metal ring, inspects for an existing surface defect on the metal ring, which comprise a scraper, wherein each of the pair of rollers has its outer circumferential surface in contact with a blade edge of the scraper.

1 . A peripheral length correction device with a metal ring wrapped around a pair of rollers of a rotating driver side and a follower side, wherein, while regulating a separation distance of the pair of rollers and exerting a predetermined tension to the metal ring, corrects the metal ring peripheral length by strengthening the predetermined tension, comprising: 
 a scraper, wherein each of the pair of rollers has its outer circumferential surface in contact with a blade edge of said scraper.    
   
   
       2 . A peripheral length measurement device with a metal ring wrapped around a pair of rollers of a rotating driver side and a follower side, wherein, while regulating a separation distance of the pair of rollers and exerting a predetermined tension to the metal ring, measures the separation distance to provide a measurement value and calculates the metal ring peripheral length from the measurement value, comprising: 
 a scraper, wherein each of the pair of rollers has its outer circumferential surface in contact with a blade edge of said scraper.    
   
   
       3 . A surface defect inspection device with a metal ring wrapped around a pair of rollers of a rotating driver side and a follower side, wherein, while regulating a separation distance of the pair of rollers and exerting a predetermined tension to the metal ring, inspects for an existing surface defect on the metal ring, comprising: 
 a scraper, wherein each of the pair of rollers has its outer circumferential surface in contact with a blade edge of said scraper.    
   
   
       4 . The peripheral length correction device according to  claim 1 , wherein said scraper blade edge has an angle of less than 90 degrees relative to a tangential line of said outer circumferential surface of the rollers.  
   
   
       5 . The peripheral length measurement device according to  claim 2 , wherein said scraper blade edge has an angle of less than 90 degrees relative to a tangential line of said outer circumferential surface of the rollers.  
   
   
       6 . The surface defect inspection device according to  claim 3 , wherein said scraper blade edge has an angle of less than 90 degrees relative to a tangential line of said outer circumferential surface of the rollers.  
   
   
       7 . The peripheral length correction device according to  claim 1 , wherein said scraper blade edge has an angle of less than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.  
   
   
       8 . The peripheral length measurement device according to  claim 2 , wherein said scraper blade edge has an angle of less than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.  
   
   
       9 . The surface defect inspection device according to  claim 3 , wherein said scraper blade edge has an angle of less than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.  
   
   
       10 . The peripheral length correction device according to  claim 1 , wherein said scraper blade edge has an angle of substantially 90 degrees or more than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.  
   
   
       11 . The peripheral length measurement device according to  claim 2 , wherein said scraper blade edge has an angle of substantially 90 degrees or more than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.  
   
   
       12 . The surface defect inspection device according to  claim 3 , wherein said scraper blade edge has an angle of substantially 90 degrees or more than 90 degrees divided equally relative to a perpendicular line of said outer circumferential surface of the rollers.