JPS61274929A - Method for bonding fiber reinforced resin structure - Google Patents

Abstract

PURPOSE:To obtain predetermined strength by eliminating the cutting of a fiber, by winding a continuous fiber bundle impregnated with a resin in an amount of 70$85% based on a predetermined winding amount around a cylindrical insert jig under low tension and subsequently winding the remaining fiber bundle therearound under high tension while the previously wound fiber bundle is pressed. CONSTITUTION:At first, a fiber bundle 1 is wound around the groove 2a of a jig 2 to mold a ring part 5 and subsequently wound around an insert metal jig 4 to mold a spork part 6. Tension is applied at the winding time of the ring part 5 but, when the fiber bundle 1 is transferred from the ring part 5 to the spork part 6 or, contrarily, when from the spork part 6 to the ring part 5, each fiber is bent at an angle of almost 90 deg.C and, therefore, high tension can not applied to the fiber bundle 1 wound around the bent part. That is, the fiber bundle 1, to which low tension was applied, is wound around the insert metal jig 4 by the prescribed number of times to form the spork part 6 and the fiber bundle 1', to which high tension was applied, is wound around the fiber bundle 1 between flanges 7 of the metal jig 4 while the base part of the spork part 6 is pressed. When the fiber bundle 1' is wound 5-20 times by this method, the spoke base part 8 is compressed to generate bonding strength between the base part 8 and the insert metal jig 4.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は自動車のステアリングホイール等、回転力伝達
のための部品として使用される繊維強化樹脂構造体と、
回転軸を増付ける金具との接合方法に関するものである
。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fiber-reinforced resin structure used as a component for transmitting rotational force, such as a steering wheel of an automobile;
The present invention relates to a method of joining a metal fitting for adding a rotating shaft.

〔従来技術〕[Prior art]

最近、自動車等の車輌用回転部品、例えばステアリング
ホイールは軽量化のため、ポリウレタン樹脂やポリプロ
ピレン樹脂等の合成樹脂素材を用いて製造されている。Recently, rotating parts for vehicles such as automobiles, such as steering wheels, have been manufactured using synthetic resin materials such as polyurethane resin and polypropylene resin in order to reduce weight.

しかしこれらの樹脂素材の強度不足を補うため、芯材と
して例えば所定形状に成形された鉄棒または鉄パイプよ
りなる芯材を挿入して成形されるので軽量化効果が少な
く、撮動に対しても不利である。However, in order to compensate for the lack of strength of these resin materials, a core material made of, for example, an iron rod or iron pipe formed into a predetermined shape is inserted and molded, which has little weight reduction effect and is not suitable for shooting. It is disadvantageous.

これらの不具合を解決するため、ガラス連続繊維または
炭素連続繊維のロービング１束）にポリエステル樹脂ま
たはエポキシ樹脂を含浸した繊維強化樹脂を補強材とし
たステアリングホイールも試みられているが、このよう
なステアリングホイールを含めて、繊維強化樹脂（ＦＲ
Ｐ　）構造体を回転力伝達の部品として使用する場合に
は、一般に上記構造体を硬化成形した後、機械加工等の
後加工を施こし、インサート金具を嵌合接着した後に、
回転軸を取りつけている。In order to solve these problems, attempts have been made to create a steering wheel using fiber-reinforced resin, which is made by impregnating a roving (a bundle of continuous glass fibers or continuous carbon fibers) with polyester resin or epoxy resin, as a reinforcing material. The wheels, including the wheels, are made of fiber-reinforced resin (FR).
P) When using the structure as a component for transmitting rotational force, the structure is generally hardened and molded, then subjected to post-processing such as machining, and after fitting and bonding the insert fittings,
A rotating shaft is attached.

しかるにこのような方法では後加工の際に繊維が切断さ
れるのでＦＲＰ構遺体の接合部の機械強度が低下し、か
つインサート金具との接合に接着剤を用いるので接着剤
の接着強度への依存度が高く、熱シ目ツク等に対する信
頼性に欠けていた。However, with this method, the fibers are cut during post-processing, which reduces the mechanical strength of the joints of the FRP structure, and since adhesive is used to join the insert metal fittings, there is no dependence on the adhesive strength of the adhesive. It had a high temperature and lacked reliability against heat stains and the like.

そこで本発明者等は先に樹脂含浸した連続繊維束を直接
インサート金具に巻きつけて一体的に接合する方法を提
案した。但しこれらの方法は回転力の伝達及び製造面か
ら検討発明されたものであって、連続繊維束を巻きつけ
る溝の形状の改良（特願昭５９−１２３４４５号）また
は巻付係止用のビンをとシつけたインサート金具の使用
（特願昭５９−１２６２４１号）を骨子としたものであ
った。Therefore, the present inventors previously proposed a method of directly winding a resin-impregnated continuous fiber bundle around an insert fitting and joining them integrally. However, these methods were developed from the perspective of transmitting rotational force and manufacturing, and they require improvement of the shape of the groove around which the continuous fiber bundle is wound (Japanese Patent Application No. 59-123445) or a winding locking pin. The main idea was to use a metal insert with a sharp edge (Japanese Patent Application No. 126241/1982).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかるにＦＲＰ構造体の形状及び製造法によってはイン
サート金具に高い張力で連続繊維束を巻くのが不可能な
ことがあシ、そのときには所定の接合強度が得られない
という問題が生ずる。However, depending on the shape and manufacturing method of the FRP structure, it may be impossible to wrap the continuous fiber bundle around the insert fitting with high tension, and in that case, a problem arises in that a predetermined bonding strength cannot be obtained.

例えば高い張力をもって巻かれた繊維が治具にならって
急に方向を変えられると、曲げ応力をうけて切断したシ
、毛羽立ちが生ずるというような場合である。For example, if a fiber wound with high tension is suddenly changed direction by a jig, the fiber will be subjected to bending stress, causing breakage and fluffing.

本発明は上記の問題点に鑑み、インサート金具に巻付け
る繊維に高い張力をかけずにしかも該インサート金具と
の間に高い接合強度の得られるＦＲＰ構造体の接合方法
を提供しようとするものである。In view of the above-mentioned problems, the present invention seeks to provide a method for joining an FRP structure that does not require high tension to be applied to the fibers wound around the insert metal fittings, and that also provides high bonding strength between the fibers and the insert metal fittings. be.

〔問題点を解決するための手段〕[Means for solving problems]

本発明のＦＲＰ構造体の接合方法は、 両熾にフランジを有し一央部が巻付部となっている円筒
状のインサート金具に巻付は所要量の７０ないし８５％
の樹脂含浸連続繊維束を低い張力で巻き回し、さらに基
部であるインサート金具上に巻かれた繊維束を該インサ
ート金具の一方のフランジ側に押えつけながら、他方の
フランジとの間に高張力をかけた残りの樹脂含浸連続繊
維束を巻きつけることを特徴とするものである。The method for joining an FRP structure of the present invention is to wrap a cylindrical insert fitting having flanges on both sides and a wrapping portion in the middle by 70 to 85% of the required amount.
The resin-impregnated continuous fiber bundle is wound with low tension, and while the fiber bundle wound on the base metal insert is pressed against one flange side of the metal insert, high tension is applied between it and the other flange. This method is characterized by winding the remaining resin-impregnated continuous fiber bundle.

〔作用〕[Effect]

本発明に用いられる連続繊維束としては、例えは直径約
２３μｍのガラス繊維を２０００ないし４０００本引揃
えて１本のロービングとしたもの、あるいは直径７μｍ
の炭素繊維を１５，０００本引揃えて１本のロービング
としたもの等が用いられる。The continuous fiber bundle used in the present invention is, for example, one roving made by aligning 2,000 to 4,000 glass fibers with a diameter of about 23 μm, or a roving with a diameter of 7 μm.
A roving made of 15,000 carbon fibers arranged into one roving is used.

これらの連続繊維束に含浸される樹脂としてはエポ中シ
樹脂、不飽和ポリエステル樹脂、ビニルエステル樹脂、
フェノール樹脂等が用いられる。The resins impregnated into these continuous fiber bundles include epoxy resin, unsaturated polyester resin, vinyl ester resin,
Phenol resin etc. are used.

樹脂含浸した連続繊維束の巻きつけ量は回転部品の形状
、寸法等によって異なるがインサート金具には１００な
いし１５０回巻きつける。そして所定量の８５チ以上を
低張力下で巻くと接合強度や回転力の伝達に不足し、一
方、７０９ｂ未満では繊維に張力がか＼り過ぎて切断や
毛羽立ちを生ずる。The amount of winding of the resin-impregnated continuous fiber bundle varies depending on the shape, dimensions, etc. of the rotating part, but it is wound around the insert fitting 100 to 150 times. If the predetermined amount of 85 strands or more is wound under low tension, there will be insufficient bonding strength and transmission of rotational force, while if it is less than 709 strands, the tension will be too high on the fibers, causing breakage and fluffing.

〔実施例〕〔Example〕

以下、　Ｆａｒ構遺体としてステアリングホイール芯体
を例にとシ図面を参照して本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to the drawings, taking a steering wheel core as an example of a Far structure body.

太さ２５μｍのガラス繊維を２０００本引揃えて太さ１
１ＩＩＩ＋とした繊維束１にエポキシ樹脂１００部、硬
化剤９０部、促進剤１部からなる液状樹脂を含浸し、第
１図に示した、直径５５０ないし４２０瓢程度の治具２
に巻きつける。2000 glass fibers with a thickness of 25μm are arranged to form a thickness of 1.
1III+ fiber bundle 1 was impregnated with a liquid resin consisting of 100 parts of epoxy resin, 90 parts of curing agent, and 1 part of accelerator, and a jig 2 having a diameter of about 550 to 420 mm as shown in FIG. 1 was prepared.
Wrap it around.

治具２は第２図に示す如く回転軸５に支持さ溝２ａに繊
維束１を巻き回してリング部５を成形してから次にイン
サート金具４に巻きつけてスポーク部６を成形する。例
えば第１１図に示す切欠１１２ｂからインサート金具４
の一部を巻いて切欠８′ＩＳ２　ｃ　Ｋ巻きつけ、次に
切欠部２ｂ、２ｃからインサート金具４に巻回して切欠
部２ｄに巻きつけるが上記の巻きつけ順序は自由であり
、リング部５とスポーク部６を交互に巻きつけてもよい
。As shown in FIG. 2, the jig 2 is supported by a rotating shaft 5, and the fiber bundle 1 is wound around the groove 2a to form a ring part 5, and then wrapped around an insert fitting 4 to form a spoke part 6. For example, insert metal fitting 4 is inserted from notch 112b shown in FIG.
is wound around the notch 8'IS2cK, and then is wound around the insert fitting 4 from the notches 2b and 2c, and then wrapped around the notch 2d, but the above winding order is free. The spoke portions 6 and 6 may be wound alternately.

リング部５の巻きつけには張力をかけるが、リング部５
からスポーク部６に移る時、またはその反対にスポーク
部６からリング部５に移る際には各繊維がはソ９０°の
角度で屈折する。そこで高い張力をかけると繊維の切断
、毛羽立ちなどの損傷を生ずるので上記のような屈折部
に巻きつける繊維束１には高い張力をかけられない。Although tension is applied to the wrapping of the ring part 5,
Each fiber is bent at an angle of 90° when moving from the fiber to the spoke portion 6, or vice versa, from the spoke portion 6 to the ring portion 5. If high tension is applied, damage such as fiber breakage and fluffing will occur, so high tension cannot be applied to the fiber bundle 1 that is wound around the bent portion as described above.

即ち第４図に示す如くインサート金具４の周囲に低い張
力をかけた繊維束１を規定回数（３０〜５０回）巻き回
してスポーク部６を形成したき回す。このようにして繊
維束１′を５〜２０回巻き回すとスポーク基部８が圧縮
されてインサート金具４との間に接合力を生ずる。なお
繊維束１′の繊維はガラス繊維以外のもの、例えば炭素
繊維及びケブラナイロン系、ポリエステル系等の硬化温
度に耐え得る繊維でもよく、また既に巻かれた繊維束１
から余剰の樹脂が絞シ出されるので、繊維束１′は、樹
脂含浸されなくてもよいが含浸されている方が好ましい
。That is, as shown in FIG. 4, the fiber bundle 1 under low tension is wound around the insert 4 a prescribed number of times (30 to 50 times) to form the spoke portion 6. When the fiber bundle 1' is wound 5 to 20 times in this manner, the spoke base 8 is compressed and a bonding force is generated between it and the insert fitting 4. The fibers of the fiber bundle 1' may be other than glass fibers, such as carbon fibers, Kevlar nylon fibers, polyester fibers, etc., which can withstand the curing temperature.
Since excess resin is squeezed out from the fiber bundle 1', it is not necessary to impregnate the fiber bundle 1' with the resin, but it is preferable that the fiber bundle 1' be impregnated with the resin.

第５図は下側のフランジ７′との間に繊維束１′を巻き
つけた例を示しているが効果は上記の場合と同様である
。FIG. 5 shows an example in which the fiber bundle 1' is wound around the lower flange 7', but the effect is the same as in the above case.

このようにして第６図に示す如き、リング部５とスポー
ク部６とよりなる芯体９が形成されるがインサート金具
４の周囲から余剰の樹脂や気泡が絞シ出されて、単位体
積当りの繊維密度を増し、強度を高めることができる。In this way, a core body 9 consisting of a ring part 5 and spoke parts 6 is formed as shown in FIG. can increase fiber density and strength.

そして上記芯体９を巻取り治具倍加熱して樹脂を硬化せ
しめＦＲＰ製ステアリングホイー−ルを得る。Then, the core body 9 is wound up and heated to double the temperature of a jig to harden the resin, thereby obtaining an FRP steering wheel.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の繊８強化樹脂構造体の接
合方法は、連続繊維束を直接、インサート金具に巻付は
係止してＦＲＰ構造体とインサート金具とを一体的に接
合する方法であり、従来の接合方法のように後加工によ
る繊維の切断がなく、巻付は工程中にも張力が調製され
ているので繊維の切断や毛羽立ちがない。しかもインサ
ート金具の周囲の積層体が圧縮されているのでインサー
ト金具との間に所定の接合強度を得ることができる。As explained above, the method of joining the fiber 8 reinforced resin structure of the present invention is a method of directly winding and locking the continuous fiber bundle around the insert fitting to integrally join the FRP structure and the insert fitting. Unlike conventional joining methods, there is no cutting of fibers during post-processing, and since the tension is adjusted during the winding process, there is no cutting of fibers or fuzzing. Moreover, since the laminate around the metal insert is compressed, a predetermined bonding strength can be obtained between the metal insert and the metal insert.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はステアリングホイール芯材の製造に用いられる
治具の平面図を表わし、 第２図は同じく上記治具の側面図を表わし、第３図−■
はインサート金具の平面図を表わし、第３図−■は同じ
く断面図を表わし、第４図はインサート金具の周囲の積
層体の−わし、 第６図はステアリングホイール芯体の平面図を表わす。 図中、 １．１′・・・繊維束　　　２・・・治具２ａ・−溝　
　　　　　２ｂ−ｄ・・・切欠部５・・・回転軸　　　
　　４−・・インサート金具５・・・リング部　　　　
６・・・スポーク部７．７’、−フランジ　　８・・・
スポーク基部９・・・芯体 牙１図 ｄ ２２図Fig. 1 shows a plan view of a jig used for manufacturing the steering wheel core material, Fig. 2 shows a side view of the jig, and Fig. 3 -
3 shows a plan view of the insert metal fitting, FIG. In the figure, 1.1'...Fiber bundle 2...Jig 2a-groove
2b-d... Notch 5... Rotating shaft
4-...Insert fitting 5...Ring part
6...Spoke part 7.7', -flange 8...
Spoke base 9...Core tooth 1 Figure d Figure 22

Claims (1)

【特許請求の範囲】 両端にフランジを有し央部が巻付部となつ ている円筒状のインサート金具に巻付け所要量の７０な
いし８５％の樹脂含浸連続繊維束を低い張力で巻き回し
、さらに基部であるインサート金具上に巻かれた繊維束
を該インサート金具の一方のフランジ側に押えつけなが
ら、他方のフランジとの間に高張力をかけた残りの樹脂
含浸連続繊維束を巻きつけることを特徴とする繊維強化
樹脂構造体の接合方法。[Claims] A resin-impregnated continuous fiber bundle of 70 to 85% of the required amount is wound around a cylindrical insert metal fitting having flanges at both ends and a central part serving as a winding part with low tension, Furthermore, while pressing the fiber bundle wound on the insert metal fitting that is the base to one flange side of the insert metal fitting, the remaining resin-impregnated continuous fiber bundle with high tension applied between it and the other flange is wound. A method for joining fiber-reinforced resin structures characterized by: