| 摘要 |
PROBLEM TO BE SOLVED: To alleviate a curve generated during production by a method in which in a resin layer on a tubular body main body which is made by winding a fiber reinforced prepreg, the side which is relatively far from the imaginary center of the curve generated in the production of the main body is formed thickly. SOLUTION: Tubular body main bodies 1a, 1b are made by winding a fiber reinforced prepreg which is made by impregnating reinforcing fibers which are drawn and arranged in a specified direction with a resin. A resin layers are formed on the main bodies 1a, 1b. During the production of the main bodies 1a, 1b, greater contraction force is applied on the side where the product of a longitudinal modulus of elasticity and a coefficient of linear expansion in the axial direction is greater when temperature decreases to bend a tubular body. On the side 1a which is relatively far from the imaginary center of the curve existing in the arrow direction, a relatively thick resin layer 2a is formed, while on the side 1b which is relatively near, a relatively thin resin layer 2b is formed. In this process, the thickness difference between the layer 2a and the layer 2b is set up to be able to correct the curve of the tubular body. |
