Conductive reel

Abstract

A reel ( 100 ) comprises: an adapter ( 101 ) having a shaft hole ( 104 ); a cylindrical-shaped core portion ( 102 ) where the adapter ( 101 ) is held on an inner periphery side thereof; and two disc-shaped flange portions ( 103 ) each being formed radially with respect to an axis of the core portion ( 102 ) so as to extend from an edge of the core portion ( 102 ), and a material for the adapter ( 101 ), which is different from materials for the core portion ( 102 ) and the flange portions ( 103 ), has an abrasion loss of not greater than 15 mg by 1000-cycle Taber abrasion test (load: 1 kgf, abrasion ring: CS-17). This realizes a conductive reel which can suppress dust generation from a part thereof where the dust generation is more likely to occur.

1 . A conductive reel comprising:
 a first attaching portion having a first shaft hole;   a cylindrical-shaped core portion where the first attaching portion is held on an inner periphery side thereof; and   two disc-shaped flange portions each being formed radially with respect to an axis of the core portion so as to extend from an edge of the core portion, wherein   a material for the first attaching portion, which is different from materials for the core portion and the flange portions, has an abrasion loss of not greater than 15 mg by 1000-cycle Taber abrasion test (load: 1 kgf, abrasion ring: CS-17).   
     
     
         2 . The conductive reel as set forth in  claim 1 , wherein:
 the material for the first attaching portion is made from a polyacetal resin.   
     
     
         3 . The conductive reel as set forth in  claim 1 , wherein:
 the materials for the first attaching portion, the core portion, and the flange portions have each a polymeric material mixed therein, and surface resistance of each of the first attaching portion, the core portion, and the flange portions is set in a range from 10 7 Ω to 10 10 Ω.   
     
     
         4 . The conductive reel as set forth in  claim 1 , wherein:
 a diameter of the core portion ranges from 120 mm to 130 mm.   
     
     
         5 . The conductive reel as set forth in  claim 1 , wherein:
 the core portion comprises:   an outwardly cylindrical portion that is in a shape of a hollow cylinder and forms an outward shape of the outwardly cylindrical portion;   a tubular attaching portion, provided on an inner periphery side of the outwardly cylindrical portion, holding the first attaching portion inserted thereinto so that the first shaft hole of the first attaching portion substantially matches an axis of the outwardly cylindrical portion; and   a plurality of ribs connecting between the outwardly cylindrical portion and the tubular attaching portion.   
     
     
         6 . The conductive reel as set forth in  claim 1 , further comprising:
 a second attaching portion, provided so as to be inserted into and removed from the first shaft hole of the first attaching portion, having a second shaft hole whose diameter is smaller than that of the first shaft hole.   
     
     
         7 . The conductive reel as set forth in  claim 6 , wherein:
 a material for the second attaching portion has a polymeric material mixed therein, and surface resistance of the second attaching portion is set in the range from 10 7 Ω to 10 10 Ω.   
     
     
         8 . The conductive reel as set forth in  claim 1 , wherein:
 the first shaft hole of the first attaching portion has a plurality of key grooves formed therein.   
     
     
         9 . The conductive reel as set forth in  claim 1 , wherein:
 on an outer periphery surface of the core portion, at least one slit is formed so that a length of the slit extends along an axial direction of the core portion.   
     
     
         10 . The conductive reel as set forth in  claim 9 , wherein:
 a width of the slit ranges from 2 mm to 6 mm.   
     
     
         11 . The conductive reel as set forth in  claim 1 , wherein:
 each of the flange portions have a plurality of openings that are provided symmetrically to extend in the axial direction of the core portion,   the flange portion has a strength of not lower than 2.7 N, and a total area of the plurality of openings accounts for 25% to 30% of an area of an outer surface of the flange portion which surface is perpendicular to the axial direction of the core portion.   
     
     
         12 . The conductive reel as set forth in  claim 11 , wherein:
 if the outer surface of the flange portion has an area that ranges from 115551 mm 2  to 117515 mm 2 , each of the openings has an area of not smaller than 8000 mm 2 .   
     
     
         13 . The conductive reel as set forth in  claim 1 , wherein:
 the first attaching portion, the core portion and the flange portions are gray in color.