作者: Hirotaka Nakamura , Hiroshi Hasegawa
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摘要: A shaft 6 includes a plurality of fiber reinforced resin layers s1 to s10. The include first straight layer in which 0°-compression strength is the minimum and second s9 maximum. specific tip part Tx region between end Tp position separated by 100 mm from satisfies following (a) (c): forms innermost layer; (b) arranged outside central thickness direction; (c) when defined as Cmin Cmax, difference (Cmax−Cmin) equal or greater than 550 MPa.