| 摘要 |
PROBLEM TO BE SOLVED: To effectively suppress generation of irregular deformation to the tire side part caused by disposing a reinforcing layer mainly composed of a bent cord even though a diameter expansion ratio of a tire changes depending on the width direction position. SOLUTION: Two-layer belt layers 6, 7 are disposed on an outer peripheral side of a crown area of a carcass 5, and a reinforcing layer 9 mainly composed of the bent cords 8 wrigglingly extending in the circumferential direction is disposed between the belt layers 6, 7 and the carcass 5. The reinforcing layer 9 is composed of spiral winding structures of a ribbon-like strip 10 which are rubber coated on a plurality of bent cords 8 disposed in parallel. Respective bent cords 8 in the ribbon-like strips 10 are arranged by making a plurality of cords as one unit with a phase difference of 180 degree each other. COPYRIGHT: (C)2006,JPO&NCIPI
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