| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated tube capable of sufficiently developing an elastic modulus and a strength of reinforcing fiber by suppressing a deviation of a prepreg to a reference flat surface in a direction of the fiber to a minimum limit. SOLUTION: The laminated tube is formed by cutting a prepreg sheet obtained by impregnating reinforcing fiber F oriented in an axial direction with a synthetic resin substantially in a truncated shape wider at a base end side than a front end side, winding and laminating the sheet on an outer periphery of a core 7 of a smooth conical state, and pressure baking it. The sheet is formed by bringing at least sides of three unit prepreg sheets 1a, 1b, 1c; 2a, 2b, 2c cut in the truncated shape of at least three equal lengths of a perimeter of a layer with each other perpendicularly crossing the cut surfaces of the front end side and the base end side in the direction of the fiber F and winding and laminating widths of the front end side and base end side. |
