| 摘要 |
PROBLEM TO BE SOLVED: To suppress local deformation of sole at the spike end which becomes a factor of thrusting-up by integrally forming using thermal welding a reinforcement formed by thermally welding a plate of titanium on the sole on which a spike is abutting with a thermplastic resin. SOLUTION: A reinforcement 5, which is formed by thermally welding a sheet of titanium alloy formed in 0.5 mm thick mesh with a thermoplastic resin, is integrally formed on a sole body 1 consisting of a thermoplastic resin with nuts by thermal welding. The shape of the reinforcement, 5 is arbitrarily formed according to the shape of the spikes 2 integrally formed of three spikes 2 through connecting parts 2d. In other words, the shape of the reinforcement 5 is formed separately so that the substrate part 2b bestrides the connecting parts 2d of the spikes on the bottom of the sole 1 on which the base parts 2b of two spikes on the outer side of a foot.
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