Tape reel and method for manufacturing the same

Abstract

A tape reel according to the present invention includes: a disk-shape first flange having an opening in its central portion; a disk-shape second age having an opening in its central portion; and a cylindrical hub that includes, on an outer periphery thereof, a first pedestal for receiving the first flange and a second pedestal for receiving the second flange. The first flange and the second flange are joined to the first and second pedestals of the hub, respectively, and extend in a radial direction from the outer periphery of the hub. When viewed along a direction of a rotation axis of the reel, an outer periphery of the first pedestal and an outer periphery of the second pedestal are on circumferences of different concentric circles, and an upper surface of the first pedestal and an upper surface of the second pedestal face the same direction.

1 . A tape reel comprising: 
 a disk-shape first flange having an opening in its central portion;    a disk-shape second flange having an opening in its central portion; and    a cylindrical hub that comprises, on an outer periphery thereof, a first pedestal for receiving the first flange and a second pedestal for receiving the second flange,    wherein the first flange and the second flange are joined to the first and second pedestals of the hub, respectively, and extend in a radial direction from the outer periphery of the hub,    when viewed along a direction of a rotation axis of the reel, an outer periphery of the first pedestal and an outer periphery of the second pedestal are on circumferences of different concentric circles, and an upper surface of the first pedestal and an upper surface of the second pedestal face the same direction.    
   
   
       2 . The tape reel according to  claim 1 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    each of the first flange and the second flange has a joining rib on its inner periphery,    each of the first pedestal and the second pedestal has a joining groove,    the joining rib of the first flange is joined to the joining groove of the first pedestal by ultrasonic welding, and    the joining rib of the second flange is joined to the joining groove of the second pedestal by ultrasonic welding.    
   
   
       3 . The tape reel according to  claim 2 , wherein a welding projection is provided on a tip end of the joining rib of each of the first flange and the second flange.  
   
   
       4 . The tape reel according to  claim 1 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    the first flange is joined to the first pedestal by caulking, and    the second flange is joined to the second pedestal by ultrasonic welding.    
   
   
       5 . The tape reel according to  claim 1 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    the first flange is joined to the first pedestal with an adhering member, and    the second flange is joined to the second pedestal with an adhering member.    
   
   
       6 . A method for manufacturing a tape reel, the tape reel comprising: 
 a disk-shape first flange having an opening in its central portion;    a disk-shape second flange having an opening in its central portion; and    a cylindrical hub that comprises, on an outer periphery thereof, a first pedestal for receiving the first flange and a second pedestal for receiving the second flange,    wherein the first flange and the second flange are joined to the first and second pedestals of the hub, respectively, and extend in a radial direction from the outer periphery of the hub,    when viewed along a direction of a rotation axis of the reel, an outer periphery of the first pedestal and an outer periphery of the second pedestal are on circumferences of different concentric circles, and an upper surface of the first pedestal and an upper surface of the second pedestal face the same direction,    the method comprising the steps of:    joining the first flange to the first pedestal; and    joining the second flange to the second pedestal.    
   
   
       7 . The method according to  claim 6 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    each of the first flange and the second flange has a joining rib on its inner periphery,    each of the first pedestal and the second pedestal has a joining groove,    the joining rib of the first flange is joined to the joining groove of the first pedestal by ultrasonic welding, and    the joining rib of the second flange is joined to the joining groove of the second pedestal by ultrasonic welding.    
   
   
       8 . The method according to  claim 6 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    the first flange is joined to the first pedestal by caulking, and    the second flange is joined to the second pedestal by ultrasonic welding.    
   
   
       9 . The method according to  claim 6 , wherein 
 an outer diameter of the first pedestal is smaller than an outer diameter of the second pedestal,    the first flange is joined to the first pedestal with an adhering member, and    the second flange is joined to the second pedestal with an adhering member.