| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bead part structure for a pneumatic tire capable of largely enhancing anti-removal out property of a carcass ply under the simple bead part structure. Ž<P>SOLUTION: In the bead part structure, respective side part portions of the one sheet or more of carcass plies 2 comprising a ply cord 2a extending to be toroidal between a pair of bead parts are clamped between an inner half part 4 of the bead core 3 arranged at an inner surface side of the tire and an outer half part 5 arranged at an outer surface side of the tire. Each the inner half part 4 and the outer half part 5 of the bead core 3 is made to a wound structure formed by circumferentially winding bead wires 4a, 5a, and flat surfaces 4b, 5b contacted with the carcass ply 2 are provided on the bead wires 4a, 5a positioned adjacent to the side part portion of the carcass ply 2. Corner parts 4c, 5c are provided on an inner portion in a radial direction of the bead core of the flat surfaces 4b, 5b of the bead wire 3. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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