LOCKING BOLT

PROBLEM TO BE SOLVED: To provide a locking bolt made of FRP in a hollow pipe shape having improved rupture strength in a radius direction or twisting-resistant torque strength. SOLUTION: In a tubular body in a hollow pipe shape where an inner layer, a middle layer, and an outer layer made of a fiber-reinforced resin each are laminated in this order and a tip section and a base section are open, the inner layer is a fiber-reinforced resin layer containing continuous fiber that is orientated in the axial direction of the tubular body as a reinforcing material, the middle layer is a fiber-reinforced resin layer containing continuous fiber that is wound around the peripheral direction of the tubular body as a reinforced material, the outer layer is a fiber-reinforced resin layer containing continuous fiber that is orientated in the axial direction of the tubular body as a reinforcing material. Continuous fiber flux dipped with a resin material is wound spirally on the surface of the outer layer in a tubular locking bolt. COPYRIGHT: (C)2003,JPO