JPS643859Y2 - - Google Patents

Description

【考案の詳細な説明】 産業上の利用分野 本考案は、強度を低下させずに他部材と接合し
得るようにした繊維強化合成樹脂製ばね板に関す
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fiber-reinforced synthetic resin spring plate that can be joined to other members without reducing strength.

従来の技術及び考案が解決しようとする問題点 近年、乗用車、小形貨物車等の自動車の車体重
量軽減の一環として懸架装置用の板ばねを鋼製か
ら繊維強化合成樹脂（以下、FRPと称する）製
に変更する動きがあるが、全体をFRPとするに
は、板端の目玉部の形成方法などに解決すべき問
題が残されており、第１段階として、目玉部を有
する親板を鋼製とし、これにFRP製の子板を重
ねあわせて結束した重ね板ばねの実用化が進めら
れている。この場合、従来の全鋼製の重ね板ばね
のように、親板と子板とに取付孔を貫設し、これ
に通したボルトで締め付けて結束すると、FRP
製ばね板内の補強繊維が取付孔の部分で切断され
て強度及び耐久性が著しく低下する結果となる。
このため、FRP製ばね板の成形時にピンを挿入
しておき、加圧成形して合成樹脂が硬化したのち
このピンを抜き取つて取付孔を形成するか、もし
くは、金属製の筒体を埋め込んで成形し、筒体の
中心孔を取付孔とすることにより補強繊維を切断
しないで取付孔を形成する方法が提案されている
が、鋼製のばね板との間に前後方向の力が作用す
ると、ボルト若しくは筒体が楔状に食い込んで
FRP製ばね板が補強繊維に沿つて亀裂を生ずる
ことがある。このような問題は、FRP製のばね
板に当て板等を接合する場合にも同様に生ずるこ
とである。Problems to be solved by conventional technologies and ideas In recent years, as part of efforts to reduce the weight of automobiles such as passenger cars and small cargo vehicles, leaf springs for suspension systems have been changed from steel to fiber-reinforced synthetic resin (hereinafter referred to as FRP). There is a movement to change to FRP, but in order to make the entire board made of FRP, there are still issues to be solved, such as how to form the eyelets at the edges of the board. The practical use of stacked leaf springs, which are made by laminating FRP subplates and binding them together, is underway. In this case, as with conventional all-steel stacked leaf springs, if mounting holes are made through the parent plate and child plate, and the bolts passed through these are tightened and bound together, the FRP
The reinforcing fibers in the spring plate are cut at the attachment holes, resulting in a significant decrease in strength and durability.
For this reason, a pin is inserted during molding of the FRP spring plate, and after the synthetic resin has hardened through pressure molding, the pin is removed to form a mounting hole, or a metal cylinder is embedded. A method has been proposed in which the center hole of the cylindrical body is used as the mounting hole to form the mounting hole without cutting the reinforcing fibers. Then, the bolt or cylindrical body bites into a wedge shape.
FRP spring plates may crack along the reinforcing fibers. Such a problem also occurs when a patch plate or the like is bonded to an FRP spring plate.

問題点を解決するための手段 このように、他部材と接合することによる強度
の低下を回避するための手段として、本考案の
FRP製ばね板は、他部材と接合する面に、その
ばね板の長手方向断面が円弧をなし、かつ、他部
材に形成された凸部と緊密に嵌合する凹部を形成
し、補強繊維を該凹部の円弧に沿う流線状に配し
た構成とした。Means for Solving the Problems As described above, the present invention has been proposed as a means to avoid a decrease in strength due to joining with other members.
FRP spring plates have reinforcing fibers formed on the surface to be joined to other members, the longitudinal cross-section of the spring plate forming an arc, and a recess that tightly fits into the protrusion formed on the other member. The structure is arranged in a streamlined manner along the arc of the recess.

なお、本明細書において、繊維強化合成樹脂
（FRP）とは、熱硬化性合成樹脂を使用した狭義
のFRPの外に、熱可塑性合成樹脂を使用した
FRTPを含む広義のFRPを指称するものである。 In addition, in this specification, fiber-reinforced synthetic resin (FRP) refers to FRP that uses thermosetting synthetic resin in the narrow sense, as well as FRP that uses thermoplastic synthetic resin.
This refers to FRP in a broad sense, including FRTP.

考案の作用及び効果 本考案は上記構成になり、凹部を、そのばね板
の長手方向において円弧をなすようにして埋め込
まれた補強繊維を円弧に沿う滑らかな流線状に配
したから、補強繊維の粗密の差が小さく、角が生
ずるような形状の凹部を形成した場合のように、
補強繊維がほとんど存在しないで強度が著しく低
い部分が生ずることがなく、凹部の全体にわたつ
て耐圧強度が高く、他部材との間にばね板の長手
方向の力が作用して他部材の凸部が凹部に強く押
し付けられても容易に圧潰したり亀裂を生じたり
するおそれがなく、他部材との間に強固な位置決
めを構成することができる効果がある。Functions and Effects of the Invention The present invention has the above-mentioned structure, and the reinforcing fibers embedded in the recessed portions form an arc in the longitudinal direction of the spring plate are arranged in a smooth streamline shape along the arc. As in the case of forming a concave part with a shape where the difference in density is small and a corner is formed,
There are almost no reinforcing fibers, so there are no parts where the strength is extremely low, and the pressure resistance is high throughout the recess, and the force in the longitudinal direction of the spring plate acts between it and other parts, preventing the convexity of other parts. Even if the part is strongly pressed against the recess, there is no fear that it will be easily crushed or cracked, and it is possible to establish a strong positioning between the parts and other members.

実施例 以下、本考案の一実施例を添付図面に基づいて
説明する。Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

第１，２図に示す本考案の第１実施例におい
て、鋼製の親板１の両端にはその板端を回曲した
目玉部２，２が一体に形成され、長さ方向及び幅
方向の中央に取付孔３が透設されており、この取
付孔３に、上面に頭部５を突出し、下端を圧潰し
て半球形の凸部６を形成したリベツト４が固着さ
れている。親板１の下面に重ね合わされるFRP
製の子板７は、ガラス繊維、炭素繊維等の長繊維
からなる補強繊維８を一定幅に整列してエポキシ
樹脂、不飽和ポリエステル樹脂、フエノール樹脂
等の熱硬化性合成樹脂または熱可塑性合成樹脂を
含浸させ、これを上下方向に積層して加圧成形
し、合成樹脂を硬化させたものであつて、成形用
の金型の上型の内面に前記リベツト４の凸部６に
対応する形状の凸部を形成しておき、この凸部に
よつて素材の上面を押圧することにより、この子
板７の上面に半球形の凹部９が形成される。ここ
で、子板７内の補強繊維は、上型の凸部により押
圧されて上面近くのものが凹部９にそつてわん曲
した流れとなつているが、いずれも切断されてい
ないのである。この凹部９の深さ及び直径は、大
きければ大きい程、リベツト４の凸部６との係合
が強固となつて親板１とのずれの防止に有効であ
るが、子板７の強度低下の原因となり、また、補
強繊維８を切断させずに凹成することが困難とな
るから、子板７の厚さ及び幅の夫々２分の１以
下、好ましくは、３分の１から５分の１程度とす
るのが良い。なお、凹部９の深さ若しくは直径が
大きい場合には、子板７の中央部の下面若しくは
両側面を膨出させて断面の減少及びこれに伴なう
補強繊維８の高密度化を防止するようにしてもよ
い。 In the first embodiment of the present invention shown in FIGS. 1 and 2, eye portions 2, 2 are integrally formed at both ends of a steel main plate 1, and the center plate 1 is curved in the length direction and width direction. A mounting hole 3 is transparently provided in the center of the mounting hole 3, and a rivet 4 having a head 5 projecting from the upper surface and a hemispherical convex portion 6 formed by crushing the lower end is fixed to the mounting hole 3. FRP superimposed on the bottom surface of the main board 1
The child plate 7 is made of thermosetting synthetic resin or thermoplastic synthetic resin such as epoxy resin, unsaturated polyester resin, phenolic resin, etc. by arranging reinforcing fibers 8 made of long fibers such as glass fibers and carbon fibers in a constant width. The synthetic resin is impregnated with the resin, layered vertically and pressure-molded, and the synthetic resin is cured. A hemispherical recess 9 is formed on the upper surface of the daughter plate 7 by forming a convex portion and pressing the upper surface of the material with this convex portion. Here, the reinforcing fibers in the daughter plate 7 are pressed by the convex part of the upper die, and those near the top surface form a curved flow along the concave part 9, but none of them are cut. The larger the depth and diameter of this recess 9, the stronger the engagement of the rivet 4 with the convex part 6, which is effective in preventing displacement from the parent plate 1, but the lower the strength of the daughter plate 7. In addition, since it becomes difficult to form a recess without cutting the reinforcing fibers 8, the thickness and width of the child plate 7 should be less than 1/2, preferably 1/3 to 5 minutes. It is best to set it to about 1. In addition, when the depth or diameter of the recess 9 is large, the lower surface or both side surfaces of the central part of the daughter plate 7 are bulged to prevent a reduction in the cross section and a concomitant increase in the density of the reinforcing fibers 8. You can do it like this.

このように成形されたFRP製の子板７は、上
面の凹部９をリベツト３の凸部６に緊密に緊合し
て鋼製の親板１の下面に重ね合わされ、両側の板
端近くにおいてバンド１０，１０により締め付け
られて親板１と結束される。 The FRP child plate 7 formed in this way is superimposed on the lower surface of the steel master plate 1 with the concave portion 9 on the upper surface tightly fitted to the convex portion 6 of the rivet 3, and is placed near the ends of the plate on both sides. It is tightened by bands 10, 10 and bound to the main plate 1.

本考案にかかるFRP製ばね板の中央部を他部
材である鋼製の親板に接合する方法のいくつかの
例を前記第１実施例の重ね板ばねについて説明す
ると、第３，４図はＵボルトｂを用いて車軸ａへ
の固定を兼ねる構造のものであつて、第３図例は
親板１と車軸ａの間にスペーサｆを介在させ、子
板７の下面にプレートｃを当ててナツトｄで締め
付けたものであり、第４図例は親板１と子板７に
ゴム板等の緩衝板ｇと互いに当接する締め板ｈを
介して第３図例と同様にＵボルトｂ、プレートｃ
及びナツトｄで車軸ａに固定し、かつ両ばね板
１，７を結束したものである。また、第５，６図
は両ばね板１，７の結束のみを目的とするもので
あつて、第５図例は両ばね板１，７を緩衝板ｇを
介して鋼板製のバンドｉで結束し、そのバンドｉ
を両端に形成した鉤片ｊで係止したものであり、
第６図例は同じく両ばね板１，７に緩衝板ｇを介
して上面と下面に夫々鋼板製の締め板ｋ，ｍを当
て、下面側の締め板ｍを内側へ曲げて鉤部ｎで上
面側の締め板ｋと係合したものである。 Some examples of the method of joining the center part of the FRP spring plate according to the present invention to the steel main plate, which is another member, will be explained for the stacked leaf spring of the first embodiment. It has a structure that also serves as a fixation to the axle a by using U-bolts b, and the example in FIG. In the example shown in Fig. 4, a U-bolt b is attached to the main plate 1 and the daughter plate 7 through a buffer plate g such as a rubber plate and a tightening plate h that abuts each other, as in the example shown in Fig. 3. , plate c
It is fixed to the axle a with nuts d and both spring plates 1 and 7 are tied together. 5 and 6 are for the sole purpose of binding both spring plates 1 and 7, and the example in FIG. Unite, the band i
is secured with hooks j formed on both ends,
In the example shown in Fig. 6, clamping plates k and m made of steel are applied to the upper and lower surfaces of both spring plates 1 and 7, respectively, via a buffer plate g, and the lower clamping plate m is bent inward to form a hook part n. It is engaged with the tightening plate k on the upper surface side.

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

添付図面は本考案の実施例を示し、第１図は第
１実施例の一部切欠側面図、第２図は同平面図、
第３〜６図は、夫々、本考案のFRP製ばね板を
他部材である鋼製の親板に接合して結束した構造
を示す断面図である。 １：鋼製の親板（他部材）、７：繊維強化合成
樹脂製の子板、８：補強繊維、６：凸部、９：凹
部。 The accompanying drawings show embodiments of the present invention, with FIG. 1 being a partially cutaway side view of the first embodiment, and FIG. 2 being a plan view of the same.
3 to 6 are cross-sectional views showing a structure in which the FRP spring plate of the present invention is bonded to a steel parent plate, which is another member, and bound together. 1: Main plate made of steel (other members), 7: Child plate made of fiber-reinforced synthetic resin, 8: Reinforcing fibers, 6: Convex portion, 9: Concave portion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一面に他部材が接合される繊維強化合成樹脂製
ばね板であつて、該ばね板の前記一面に、該ばね
板の長手方向断面が円弧をなし、前記他部材に形
成された凸部と緊密に嵌合する凹部を形成し、補
強繊維を該凹部の円弧に沿う流線状に配したこと
を特徴とする繊維強化合成樹脂製ばね板。 A spring plate made of fiber-reinforced synthetic resin to which another member is bonded to one side, wherein the one side of the spring plate has a longitudinal cross-section of an arc, and is tightly fitted with a convex portion formed on the other member. 1. A spring plate made of fiber-reinforced synthetic resin, characterized in that a recess is formed to fit into the recess, and reinforcing fibers are arranged in a streamline shape along the arc of the recess.