JPH0710063A - Front fork for bicycle made of carbon fiber reinforced plastic and manufacture thereof - Google Patents
Front fork for bicycle made of carbon fiber reinforced plastic and manufacture thereofInfo
- Publication number
- JPH0710063A JPH0710063A JP5157280A JP15728093A JPH0710063A JP H0710063 A JPH0710063 A JP H0710063A JP 5157280 A JP5157280 A JP 5157280A JP 15728093 A JP15728093 A JP 15728093A JP H0710063 A JPH0710063 A JP H0710063A
- Authority
- JP
- Japan
- Prior art keywords
- carbon fiber
- front fork
- fiber
- fiber reinforced
- reinforced plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Steering Devices For Bicycles And Motorcycles (AREA)
- Laminated Bodies (AREA)
- Woven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、炭素繊維強化プラス
チック製自転車用フロントフォーク及びその製造方法に
かかわり、更に詳しくはＲＴＭ（Resin Transfer Moldi
ng) 成形法を用いて自転車用フロントフォークを製造す
る場合、横方向を繊維糸により拘束された一方向引き揃
えの炭素繊維トウを用いてフロントフォークを成形する
ことにより、作業性及び生産性を向上させることが出来
る炭素繊維強化プラスチック製自転車用フロントフォー
ク及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon fiber reinforced plastic front fork for a bicycle and a method for manufacturing the same, and more specifically, RTM (Resin Transfer Moldi).
ng) When manufacturing a bicycle front fork using the molding method, workability and productivity are improved by molding the front fork using unidirectionally aligned carbon fiber tows that are constrained by fiber threads in the lateral direction. The present invention relates to a carbon fiber reinforced plastic bicycle front fork and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来、ＲＴＭ（Resin Transfer Moldin
g) 成形法を用いた自転車用フロントフォークには、平
織り，ブレード織り，一方向引き揃えの炭素繊維トウ
（炭素繊維を３０００本程度一方向引き揃えたもの）等
が補強繊維として用いられていた。特に上記の一方向引
き揃えの炭素繊維トウ１は、図５及び図６に示すよう
に、ボビンより巻き出した炭素繊維トウ１をフロントフ
ォークの全長より大きめの平板に撚りを戻し、炭素繊維
トウ１にサイジング剤が約３ｗｔ％付着するようにサイ
ジング処理を施して熱風乾燥させ、これを自転車のフォ
ーク部２を構成するコア３の表面に対して１本ずつ固定
しながら並べて所定量を配置して構成する。このような
炭素繊維トウ１は、フォーク部２の強度／剛性を保持し
ながらクラウン部４へ応力を伝達する重要な役割があ
る。2. Description of the Related Art Conventionally, RTM (Resin Transfer Moldin)
g) Bicycle front forks using the molding method used plain weave, blade weave, unidirectionally aligned carbon fiber tows (3,000 carbon fibers unidirectionally aligned), etc. as reinforcing fibers. . In particular, as shown in FIGS. 5 and 6, the unidirectionally aligned carbon fiber tow 1 returns the carbon fiber tow 1 unwound from the bobbin to a flat plate having a size larger than the entire length of the front fork. 1 is subjected to a sizing treatment so that about 3 wt% of the sizing agent adheres to it, and dried with hot air. Configure. Such a carbon fiber tow 1 has an important role of transmitting stress to the crown portion 4 while maintaining the strength / rigidity of the fork portion 2.
【０００３】[0003]
【発明が解決しようとする問題点】然しながら、市販の
炭素繊維トウ１は、ボビン形状に巻かれているため、炭
素繊維トウ１に回転やねじれ等の巻ぐせがついており、
なかなか引き揃え難く、作業性が悪いと言う問題があっ
た。また、炭素繊維トウ１を並べただけでは、横方向の
拘束が全くないため、平板以外の立体では形状に沿って
配置する場合にばらけてしまい、その都度所々でコア３
に固定する等の工程が必要となり、多くの手間と時間が
かかると言う問題があった。However, since the commercially available carbon fiber tow 1 is wound in a bobbin shape, the carbon fiber tow 1 has a curl such as rotation and twist,
There was a problem that it was difficult to align them and the workability was poor. In addition, if the carbon fiber tows 1 are simply arranged, there is no restraint in the lateral direction, so that the solids other than the flat plate are scattered when they are arranged along the shape, and the cores 3 are scattered in each case.
However, there is a problem that it requires a lot of trouble and time because it requires a process such as fixing to.
【０００４】この発明は、かかる従来の問題点に着目し
て案出されたもので、炭素繊維トウの引き揃えを簡単に
行うことが出来、また炭素繊維トウをコアに固定する等
の作業を省略でき、作業性，生産性の向上を図ることが
出来る炭素繊維強化プラスチック製自転車用フロントフ
ォーク及びその製造方法を提供することを目的とするも
のである。The present invention has been devised in view of the above-mentioned problems of the prior art, and can easily align the carbon fiber tows, and also work such as fixing the carbon fiber tows to the core. It is an object of the present invention to provide a carbon fiber reinforced plastic front fork for a bicycle, which can be omitted, and can improve workability and productivity, and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】この発明は、上記目的を
達成するため、クラウン部と、このクラウン部から二股
状に分かれたフォーク部とを有するフロントフォークの
コア表面に、補強繊維を一方向に引き揃えて一体的に成
形してなる炭素繊維強化プラスチック製自転車用フロン
トフォークにおいて、前記補強繊維を、所定の間隔で横
方向を繊維糸により拘束された一方向引き揃えの炭素繊
維トウを用いて構成したことを要旨とするものである。
また、前記補強繊維として、すだれ織物または基盤布に
一方向引き揃えの炭素繊維トウを固定した一方向配列繊
維強化シートを用いるものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a reinforcing fiber in one direction on a core surface of a front fork having a crown portion and a fork portion bifurcated from the crown portion. A carbon fiber reinforced plastic front fork for a bicycle, which is integrally formed by aligning with each other, using a unidirectionally aligned carbon fiber tow in which the reinforcing fibers are constrained laterally by fiber yarns at predetermined intervals. The summary is that it is configured.
Further, as the reinforcing fiber, a unidirectionally arranged fiber reinforced sheet in which unidirectionally aligned and aligned carbon fiber tows are fixed to a blind cloth or a base cloth is used.
【０００６】[0006]
【作用】この発明は、上記ように構成され、予め横方向
を繊維糸により拘束された一方向引き揃えの炭素繊維ト
ウを、フロントフォーク長さに裁断し、この炭素繊維ト
ウをフロントフォークのコア表面に巻付けることによ
り、フロントフォークの長手方向に綺麗に、しかも作業
性良く配置出来、また炭素繊維トウをコアに固定する等
の作業を省略でき、作業性，生産性の向上を図ることが
出来るものである。According to the present invention, a unidirectionally aligned carbon fiber tow, which is constructed as described above and is previously constrained by fiber yarns, is cut into a front fork length, and the carbon fiber tow is cut into a core of the front fork. By wrapping around the surface, the front fork can be arranged neatly in the longitudinal direction with good workability, and work such as fixing the carbon fiber tow to the core can be omitted, improving workability and productivity. It can be done.
【０００７】[0007]
【実施例】以下、添付図面に基づきこの発明の実施例を
説明する。なお、従来例と同一構成要素は、同一符号を
付して説明は省略する。図１は、この発明を実施したフ
ロントフォークとして用いる補強繊維１０の平面図、図
２は図１のＡーＡ矢視断面図、図３はすだれ織物とした
補強繊維１０の斜視図を示し、前記補強繊維１０は、１
束３０００本程度の炭素繊維１１の長手方向を、所定の
間隔を隔てて（１本／５mm）、ガラス繊維または有機繊
維等の繊維糸１２で束ねて一方向引き揃えの炭素繊維ト
ウ１３（繊維目付けが160g/ m2) を構成し、この炭素繊
維トウ１３を複数本一方向引き揃えて前記繊維糸１２に
より連結してすだれ織物としたものである。Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. 1 is a plan view of a reinforcing fiber 10 used as a front fork embodying the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. The reinforcing fiber 10 is 1
A carbon fiber tow 13 (fibers) of about 3,000 carbon fibers 11 aligned in one direction and bundled with fiber yarns 12 such as glass fibers or organic fibers at predetermined intervals (1/5 mm). The basis weight is 160 g / m 2 ), and a plurality of carbon fiber tows 13 are aligned in one direction and connected by the fiber threads 12 to form a blind fabric.
【０００８】そして、このような炭素繊維トウ１３をフ
ロントフォークとして用いる場合には、予め横方向を繊
維糸１２によりほつれ止め程度に拘束された一方向引き
揃えの炭素繊維トウ１３を、フロントフォーク長さに裁
断し、この炭素繊維トウ１３をフロントフォークのコア
３の表面に巻付けることにより、フロントフォークの長
手方向に綺麗に、しかも作業性良く配置出来るものであ
る。When such a carbon fiber tow 13 is used as a front fork, the one-way aligned carbon fiber tow 13 previously constrained by the fiber yarn 12 to the extent that it does not fray is used as the front fork length. The carbon fiber tow 13 is cut into pieces and wound around the surface of the core 3 of the front fork, so that the carbon fiber tow 13 can be arranged neatly and with good workability in the longitudinal direction of the front fork.
【０００９】このように構成することによって、炭素繊
維トウ１３の引き揃えを簡単に行うことが出来、また炭
素繊維トウ１３をコア３に固定する等の作業も省略で
き、作業性，生産性の向上を図ることが出来るものであ
る。図４は、補強繊維１０の第２実施例を示し、この実
施例は、基盤布１４の一側面に、樹脂等の粘着材１５を
塗布し、この粘着材１５の表面に一方向引き揃えの炭素
繊維トウ１３を配列して、特開平５−３１８３９号公報
に開示されているように一方向配列繊維強化シート１６
を構成したものである。With this structure, the carbon fiber tows 13 can be easily aligned and the work of fixing the carbon fiber tows 13 to the core 3 can be omitted, so that workability and productivity are improved. It is possible to improve. FIG. 4 shows a second embodiment of the reinforcing fiber 10. In this embodiment, an adhesive material 15 such as a resin is applied to one side surface of the base cloth 14, and the surface of the adhesive material 15 is unidirectionally aligned. The carbon fiber tow 13 is arranged and the unidirectionally arranged fiber reinforced sheet 16 is arranged as disclosed in JP-A-5-31839.
Is configured.
【００１０】このような一方向配列繊維強化シート１６
をフロントフォーク用補強繊維として用いる場合には、
上記の第１実施例と同様に、一方向配列繊維強化シート
１６をフロントフォーク長さに裁断し、この一方向配列
繊維強化シート１６をフロントフォークのコア３の表面
に巻付けて、これをプリフォームとし、ＲＴＭ成形によ
り一体的に成形するものである。Such a unidirectionally arranged fiber reinforced sheet 16
When using as a reinforcing fiber for the front fork,
Similar to the above-mentioned first embodiment, the unidirectionally arranged fiber reinforced sheet 16 is cut into the length of the front fork, and the unidirectionally arranged fiber reinforced sheet 16 is wound around the surface of the core 3 of the front fork, and this is pressed. It is a reform and integrally molded by RTM molding.
【００１１】[0011]
【発明の効果】この発明は、上記のように予め横方向を
繊維糸によりほつれ止め程度に拘束された一方向引き揃
えの炭素繊維トウを使用した織物またはシートを使用し
てフロントフォークを成形するので、炭素繊維トウの引
き揃えを簡単に行うことが出来、また炭素繊維トウをコ
アに固定する等の作業を省略でき、作業性，生産性の向
上を図ることが出来る効果がある。As described above, according to the present invention, the front fork is formed by using the woven fabric or the sheet using the unidirectionally aligned carbon fiber tow, which is restrained in the transverse direction to the extent of the fraying in advance as described above. Therefore, the carbon fiber tows can be easily aligned, and the work of fixing the carbon fiber tows to the core can be omitted, so that workability and productivity can be improved.
【図１】この発明を実施したフロントフォークとして用
いる補強繊維の平面図である。FIG. 1 is a plan view of a reinforcing fiber used as a front fork embodying the present invention.
【図２】図１のＡーＡ矢視断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】すだれ織物とした補強繊維の斜視図である。FIG. 3 is a perspective view of a reinforcing fiber used as a blind fabric.
【図４】一方向配列繊維強化シートとした補強繊維の断
面図である。FIG. 4 is a cross-sectional view of reinforcing fibers used as a unidirectionally arranged fiber reinforced sheet.
【図５】従来の自転車の構成を示す説明図である。FIG. 5 is an explanatory diagram showing a configuration of a conventional bicycle.
【図６】従来のフロントフォークの一部斜視図である。FIG. 6 is a partial perspective view of a conventional front fork.
３ コア １０ 補強繊維 １１ 炭素繊維 １２ 繊維糸 １３ 炭素繊維トウ １４ 基盤布 １５ 粘着材 １６ 一方向配列繊維
強化シート3 core 10 reinforcing fiber 11 carbon fiber 12 fiber yarn 13 carbon fiber tow 14 base cloth 15 adhesive material 16 unidirectionally arranged fiber reinforced sheet
Claims (3)
状に分かれたフォーク部とを有するフロントフォークの
コア表面に、補強繊維を一方向に引き揃えて一体的に成
形してなる炭素繊維強化プラスチック製自転車用フロン
トフォークにおいて、前記補強繊維を、所定の間隔で横
方向を繊維糸により拘束された一方向引き揃えの炭素繊
維トウを用いて構成したことを特徴とする炭素繊維強化
プラスチック製自転車用フロントフォーク。1. A carbon fiber reinforced plastic in which reinforcing fibers are aligned in one direction and integrally formed on a core surface of a front fork having a crown portion and a fork portion bifurcated from the crown portion. In a bicycle front fork, the carbon fiber reinforced plastic bicycle is characterized in that the reinforcing fibers are formed by using unidirectionally aligned carbon fiber tows constrained in a lateral direction by fiber yarns at predetermined intervals. Front fork.
基盤布に一方向引き揃えの炭素繊維トウを固定した一方
向配列繊維強化シートを用いた請求項１に記載の炭素繊
維強化プラスチック製自転車用フロントフォーク。2. The carbon fiber reinforced plastic bicycle front according to claim 1, wherein a unidirectionally arranged fiber reinforced sheet in which unidirectionally aligned carbon fiber tows are fixed to a woven fabric or a base cloth is used as the reinforcing fiber. fork.
方向引き揃えの炭素繊維トウを、フロントフォーク長さ
に裁断し、この炭素繊維トウをフロントフォークのコア
表面に巻付けて、一体的に成形する炭素繊維強化プラス
チック製自転車用フロントフォークの製造方法。3. A unidirectionally aligned carbon fiber tow, which is previously constrained by a fiber yarn in the lateral direction, is cut into a length of a front fork, and the carbon fiber tow is wound around a core surface of the front fork to be integrated. Of manufacturing carbon fiber reinforced plastic bicycle front forks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5157280A JPH0710063A (en) | 1993-06-28 | 1993-06-28 | Front fork for bicycle made of carbon fiber reinforced plastic and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5157280A JPH0710063A (en) | 1993-06-28 | 1993-06-28 | Front fork for bicycle made of carbon fiber reinforced plastic and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0710063A true JPH0710063A (en) | 1995-01-13 |
Family
ID=15646213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5157280A Pending JPH0710063A (en) | 1993-06-28 | 1993-06-28 | Front fork for bicycle made of carbon fiber reinforced plastic and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7008514B2 (en) | 2002-04-26 | 2006-03-07 | Sumitomo Heavy Industries Construction Crane Co. Ltd. | Door opening and closing mechanism |
-
1993
- 1993-06-28 JP JP5157280A patent/JPH0710063A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7008514B2 (en) | 2002-04-26 | 2006-03-07 | Sumitomo Heavy Industries Construction Crane Co. Ltd. | Door opening and closing mechanism |
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