초록 ▼

The transport member of the present invention is a laminate of skin and core layers made of CFRP. The skin layer comprises a prepreg made of a pitch type carbon fiber, oriented by ?20° to +20° with respect to a longitudinal direction (X-axis direction) of the transport member, having a tensile elast

The transport member of the present invention is a laminate of skin and core layers made of CFRP. The skin layer comprises a prepreg made of a pitch type carbon fiber, oriented by ?20° to +20° with respect to a longitudinal direction (X-axis direction) of the transport member, having a tensile elasticity of 500 to 1000 GPa; and a prepreg of PAN type carbon fiber, oriented by +75° to +90° and/or ?75° to ?90° with respect to the longitudinal direction, having a tensile elasticity of 200 to 400 GPa. As a consequence, a transport member which is light in weight, easy to handle, while being excellent in its bending rigidity, vibration damping characteristic, and heat resistance can be obtained.

대표청구항 ▼

1. A transport member consisting essentially of fiber-reinforced plastic,wherein said transport member is used for transporting an article to be transported, said transport member is supported in a cantilever state while transporting the article, and said transport member has a logarithmic vibration

1. A transport member consisting essentially of fiber-reinforced plastic,wherein said transport member is used for transporting an article to be transported, said transport member is supported in a cantilever state while transporting the article, and said transport member has a logarithmic vibration damping factor of 0.01 to 0.05 against bending vibration; wherein said fiber-reinforced plastic comprises: at least one first layer containing a unidirectional reinforced fiber, oriented by ?20° to +20° with respect to a longitudinal direction of said transport member, having a tensile elasticity of 500 to 1000 GPa; and at least one second layer containing a unidirectional reinforced fiber, oriented by +75° to +90° or ?75° to ?90° with respect to said longitudinal direction of said transport member, having a tensile elasticity of 200 to 400 GPa. 2. A transport member according to claim 1, wherein said fiber-reinforced plastic further comprises at least one third layer, said at least one third layer containing a unidirectional reinforced fiber, oriented by +30° to +60° or ?30° to ?60° with respect to said longitudinal direction of said transport member, having a tensile elasticity of 500 to 1000 GPa.3. A transport member comprising skin and core layers consisting essentially of a fiber-reinforced plastic;wherein said transport member is used for transporting an article to be transported, said transport member is supported in a cantilever state while transporting the article, said transport member has a logarithmic vibration damping factor of 0.01 to 0.05 against bending vibration; and said skin layer comprises at least two first layers containing a unidirectional reinforced fiber, oriented by ?20° to +20° with respect to a longitudinal direction of said transport member, having a tensile elasticity of 500 to 1000 GPa. 4. A transport member according to claim 3, wherein said core layer comprises at least two second layers containing a unidirectional reinforced fiber, oriented by +75° to +90° or ?75° to ?90° with respect to said longitudinal direction of said transport member, having a tensile elasticity of 200 to 400 GPa; or at least one third layer containing a unidirectional reinforced fiber, oriented by +30° to +60° or ?30° to ?60° with respect to said longitudinal direction of said transport member, having a tensile elasticity of 500 to 1000 GPa.5. A transport member comprising laminated skin and core layers made of carbon-fiber reinforced plastic,wherein said transport member is used for transporting an article to be transported; wherein said transport member is supported in a cantilever state while transporting the article; said transport member has a logarithmic vibration damping factor of 0.01 to 0.05 against bending vibration; and said skin layer comprises: a first layer containing a first carbon fiber, oriented by an angle range of ?20° to +20° with respect to a longitudinal direction of said transport member, having a tensile elasticity of 500 to 1000 GPa; and a second layer containing a second carbon fiber, oriented by an angle range of +75° to +90° or ?75° to ?90° with respect to said longitudinal direction, having a tensile elasticity of 200 to 400 GPa. 6. A transport member according to claim 1, 3, or 5, wherein said transport member has a bending elasticity of 200 to 800 GPa in said longitudinal direction, and a bending elasticity of 30 to 100 GPa in a transverse direction thereof.7. A transport member according to claim 3 or 5, wherein said transport member satisfies the relationship represented by the following expression (1):(Ts+Tc)×0.2?Ts?(Ts+Tc)×0.4??(1) whereTs is the thickness of said skin layer; and Tc is the thickness of said core layer. 8. A transport member according to claim 3 or 5, wherein said first layer in said skin layer has a volume of 20 to 10 vol % in said skin layer.9. A transport member according to claim 4 or 5, wherein said second layer has a volume of 0 to 80 vol % in said skin layer.10. A transport member according to claim 4, wherein said third layer in said core layer has a volume of 0 to 20 vol % in said core layer.11. A transport member according to claim 1, 3, or 5, wherein said transport member has a logarithmic vibration damping factor of 0.01 to 0.05 against bending vibration.12. A transport member according to claim 3 or 5, wherein said core layer has a bulk specific gravity falling within the range of 0.03 to 1.7 and smaller than that of said skin layer.13. A transport member according to claim 5, wherein said core layer comprises a honeycomb, a porous body, a corrugated sheet, a fiber-reinforced plastic, or a resin sheet.14. A transport member according to claim 1, 3, or 5, wherein said transport member has a general fork shape, and comprises a proximal portion secured to a fixing element to define said cantilever state, and a bifurcated portion supporting the article to be transported.