| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid rod rarely causing strength degradation from a reverse tapered surface to a forward tapered surface in a rod root side rod body while presenting a smooth reverse tapered inner peripheral surface of a rod tip side end in the rod root side rod body.SOLUTION: A solid rod is obtained by forming the inner peripheral surface of the rod tip side end of a rod root side rod body 2 in a reverse tapered shape of reducing a diameter toward the root side, forming a forward tapered inner peripheral surface 2b increasing a diameter toward the root side on the root side of the reverse tapered inner peripheral surface 2a, and winding a prepreg sheet made of glass reinforced fiber as the innermost layer in a certain range from a reverse tapered inner peripheral surface side to a forward tapered inner peripheral surface side so as to form the inner peripheral surface of the innermost layer in a smooth surface. |
