EP0404017A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producting a bicycle frame made of fiber-reinforced plastics
Assignee: Nippon Steel Corp
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Filing: 1990-06-18
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Granted: —
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Expires: 2010-06-18
Abstract
Abstract A process for producing a bicycle frame of a fiber-reinforced plastics (FRP) is provided, which comprises the steps of: forming parts of a bicycle frame such as an upper pipe (1), a lower pipe (2), a vertical pipe (3), a chain stay (5) and a rear fork (4), or a combination thereof, with an FRP; arranging the bicycle frame parts in a structure of the bicycle frame; forming, with an FRP, lug portions onto the arranged bicycle frame parts at a required position whereat the bicycle frame parts are to be connected and fixed to each other; and curing all of the lug portions at one time, to thereby simultaneously accomplish an assembling of the bicycle frame. Also provided is a process for forming a lug portion of a FRP bicycle frame, comprising the steps of: providing a female mold (31,31') with a cavity having a shape of a final lug portion; disposing a flexible sheet (32,32') on a surface of the cavity; arranging frame parts in a structure of a bicycle frame.
Inventors
- 👤 Kenji Nippon Steel Cor. R.& D Lab. I. Kubomura
- 👤 Hironori Nippon Steel Cor. R.& D Lab. I. Maikuma
- 👤 Nobuyuki Nippon Steel Cor. R.& D Lab. I. Tsuji
- 👤 Hiromi Nippon Steel Cor. R.& D Lab. I. Kimura
- 👤 Toshikazu C/O Nippon Steel Corporation Takeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:50
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/86; B29C44/00; B29C44/02; B29C44/12; B29C44/1228; B29C65/00; B29C65/70; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/1312; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5223; B29C66/5224; B29C66/52241; B29C66/5225; B29C66/5229; B29C66/52298; B29C66/70; B29C66/72; B29C66/721; B29C66/7214; B29C66/72141; B29C70/84; B29C70/845; B29D; B29D12/00; B62; B62K; B62K19/00; B62K19/02; B62K19/16; B29C66/71; B29C66/7212; B29C66/727; B29C66/73; B29C66/739; B29C66/7394; B29K; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/30; B29L2031/3091
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A process for producing a bicycle frame of a fiber-reinforced plastics (FRP), comprising the steps of: forming parts of a bicycle frame by an FRP; arranging said bicycle frame parts in a structure of the bicycle frame; forming, with an FRP, lug portions onto the arranged bicycle frame parts at a required position whereat said bicycle frame parts are to be connected and fixed to each other; and curing all said lug portions at one time to, thereby simultaneously accomplish an assembling of the bicycle frame.
Claim 2
Dependent Claim
86 words
A process for producing a bicycle frame of a fiber-reinforced plastics (FRP), comprising the steps of: forming parts of a bicycle frame by an FRP; arranging said bicycle frame parts in a structure of the bicycle frame; forming, with an FRP, lug portions onto the arranged bicycle frame parts at a required position whereat said bicycle frame parts are to be connected and fixed to each other; and curing all said lug portions at one time to, thereby simultaneously accomplish an assembling of the bicycle frame.
Claim 3
Dependent Claim
50 words
A process according to claim 1 wherein a lug portion among said lug portions is formed by providing a foam or resin body around predetermined bicycle frame parts among said bicycle frame parts at said lug portion, and laminating a prepreg of resin-impregnated fibers on said foam or resin body.
Claim 4
Dependent Claim
60 words
A process according to claim 1 wherein a lug portion among said lug portions is formed by first bonding predetermined bicycle frame parts among said bicycle frame parts with a first prepreg of resin-impregnated fibers, providing a foam or resin body around said bonding first prepreg, and laminating a second prepreg of resin-impregnated fibers on said foam or resin body.
Claim 5
Dependent Claim
25 words
A process according to claim 2 or 3, wherein said bicycle frame parts made of a prepreg include a metal member at the lug portion.
Claim 6
Dependent Claim
149 words
A process for forming a lug portion of an FRP bicycle frame, comprising the steps of: providing a female mold with a cavity having a shape of a final lug portion; disposing a flexible sheet on a surface of the cavity; arranging frame parts in a structure of a bicycle frame; arranging the female mold at a lug portion of said arranged bicycle frame parts; supplying and foaming a foaming material in the female mold at said lug portion; removing the female mold to leave an assembly of the frame parts with a foamed body; removing the flexible sheet from the female mold; laminating a foaming sheet and then a prepreg of resin-impregnated continuous fibers onto the foamed body; arranging the female mold over the laminated prepreg; and heating to cure the resin while foaming the foaming sheet to thereby form the lug portion of the FRP bicycle frame.
Claim 7
Dependent Claim
149 words
A process for forming a lug portion of an FRP bicycle frame, comprising the steps of: providing a female mold with a cavity having a shape of a final lug portion; disposing a flexible sheet on a surface of the cavity; arranging frame parts in a structure of a bicycle frame; arranging the female mold at a lug portion of said arranged bicycle frame parts; supplying and foaming a foaming material in the female mold at said lug portion; removing the female mold to leave an assembly of the frame parts with a foamed body; removing the flexible sheet from the female mold; laminating a foaming sheet and then a prepreg of resin-impregnated continuous fibers onto the foamed body; arranging the female mold over the laminated prepreg; and heating to cure the resin while foaming the foaming sheet to thereby form the lug portion of the FRP bicycle frame.
References Cited (Backward Citations)
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