Reel

Abstract

The present invention provides a reel which includes: a hub, around an outer periphery face of which a recording tape is wound; an annular first flange disposed at one axial direction end portion of the hub; an annular second flange disposed at the other axial direction end portion of the hub; a plurality of first pad portions protruding into the hub from the first flange, the first pad portions being engaged with the hub to be relatively non-rotatable; and a plurality of second pad portions protruding into the hub from the second flange, the plurality of second pad portions being welded to the plurality of first pad portions.

What is claimed is: 
     
         1 . A reel comprising:
 a hub, around an outer periphery face of which a recording tape is wound;   an annular first flange disposed at one axial direction end portion of the hub;   an annular second flange disposed at the other axial direction end portion of the hub;   a plurality of first pad portions protruding into the hub from the first flange, the first pad portions being engaged with the hub to be relatively non-rotatable; and   a plurality of second pad portions protruding into the hub from the second flange, the plurality of second pad portions being welded to the plurality of first pad portions.   
     
     
         2 . The reel according to  claim 1 , wherein the first pad portions are engaged with an inner periphery face side of the hub. 
     
     
         3 . The reel according to  claim 1 , further comprising a penetrating hole formation portion that is integrally formed at an inner periphery face of the hub and in which penetrating holes are formed,
 wherein relative rotation between the first flange and second flange and the hub is disabled by at least the first pad portions being fitted into the penetrating holes.   
     
     
         4 . The reel according to  claim 1 , further comprising a circular plate-shaped reinforcement portion that is integrally formed at an inner periphery face of the hub so as to be coaxial with the hub, and in an outer periphery portion of which penetrating holes are formed,
 wherein relative rotation between the first flange and second flange and the hub is disabled by at least the first pad portions being fitted into the penetrating holes.   
     
     
         5 . The reel according to  claim 4 , wherein a fastening portion for fastening to a rotary member of a drive device is formed at the reinforcement portion. 
     
     
         6 . The reel according to  claim 3 , wherein a gap is formed between a radial direction outer side wall face of the penetrating holes and a radial direction outer side wall face of at least the first pad portions. 
     
     
         7 . The reel according to  claim 3 , wherein
 the first pad portions are structured in a plurality of different kinds of shape,   the second pad portions are structured in a plurality of kinds of shape that correspond with the first pad portions, and   the penetrating holes are formed in a plurality of kinds of shape that correspond with at least the first pad portions.   
     
     
         8 . The reel according to  claim 1 , wherein the first flange at which the first pad portions are provided and the second flange at which the second pad portions are provided are formed in the same shape. 
     
     
         9 . The reel according to  claim 7 , wherein each of the first pad portions and the second pad portions includes an identical flat-shaped plate. 
     
     
         10 . The reel according to  claim 9 , wherein energy directors are provided with a welding surface of each of the first pad portions and the second pad portions, and the energy directors are provided intermittently in a circumferential direction and are spaced by a predetermined interval in a radial direction. 
     
     
         11 . The reel according to  claim 9 , wherein energy directors are provided from an end portion substantially to a middle portion in a circumferential direction with a welding surface of each of the first pad portions and the second pad portions, such that when the welding surfaces of the first pad portions are superposed with the welding surfaces of the second pad portion, the energy directors of the first pad portions do not face with the energy directors of the second pad portions. 
     
     
         12 . The reel according to  claim 9 , wherein the penetrating holes are formed with shapes the same as the first pad portions and the second pad portions, and a plate thickness of the penetrating hole formation portion is twice plate thicknesses of the first pad portions and the second pad portions. 
     
     
         13 . The reel according to  claim 7 , wherein each of the first pad portions and the second pad portions includes first welding ribs that is formed with a longer and narrow shape and second welding ribs that is formed with a shorter and narrow shape, and the first welding ribs and the second welding ribs are provided alternating at equal intervals. 
     
     
         14 . The reel according to  claim 13 , wherein first energy directors are formed at a radial direction outer side on the first welding ribs, and second energy directors are formed at a radial direction inner side on the second welding ribs. 
     
     
         15 . The reel according to  claim 13 , wherein the first welding ribs and the second welding ribs protrude to the same heights, and a plate thickness of the penetrating hole formation portion is twice protrusion height of the first welding ribs and second welding ribs.