JPH01167985U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1: A partially cutaway perspective view of the frame pipe of the present invention, Figure 1a: A plan view of a sheet 2 in which carbon fibers are aligned in one direction, Figure 2: Also a cross-sectional view,
Figure 3 a, b, c: Showing some examples of cloth forming the aramid fiber reinforced plastic layer 1 and the carbon fiber reinforced plastic layer 3 Figure 4: Partially cut side view of a frame using the frame pipe of the present invention figure,
Figure 5: Side view of a conventional bicycle frame. (Figures 1 to 4), 1: Aramid fiber reinforced plastic layer, 1a: Aramid fiber, 2: Unidirectionally oriented carbon fiber reinforced plastic layer, 2': Carbon fiber sheet, 2a: Carbon fiber for sheet,
3: Carbon fiber reinforced plastic layer, 3a: Carbon fiber for cloth, p: Pipe for frame, l
: Rag, s: Adhesive. Figure 5, a: vertical pipe, b: upper pipe, c: lower pipe, d: head drag, e: hanger lug, f
: Seat lug, g: Hawk end.

Claims (1)

[Claims for Utility Model Registration] 1. The innermost layer of a fiber-reinforced plastic pipe constituting the bicycle frame is made of aramid fiber-reinforced plastic layer 1 using a cloth woven with aramid fibers 1a, and the outermost layer is made of carbon fiber 3a. A carbon fiber-reinforced plastic layer 3 using woven cloth, and a unidirectional carbon fiber-reinforced plastic layer 2 using a sheet made of unidirectional carbon fibers 2a as an intermediate layer sandwiched between these two layers. A fiber-reinforced plastic pipe for a bicycle frame that is integrated by heat-setting the layers. 2 Utility model registration claim 1, which uses plain weave or satin weave cloth woven with aramid fiber 1a and plain weave or satin weave cloth woven with carbon fiber 3a as aramid fiber and carbon fiber reinforced plastic layers 1 and 3 fiber-reinforced plastic pipes for bicycle frames.