JPH0771091A - Pipe body made of continuous fiber-reinforced plastic and usage thereof - Google Patents
Pipe body made of continuous fiber-reinforced plastic and usage thereofInfo
- Publication number
- JPH0771091A JPH0771091A JP16479794A JP16479794A JPH0771091A JP H0771091 A JPH0771091 A JP H0771091A JP 16479794 A JP16479794 A JP 16479794A JP 16479794 A JP16479794 A JP 16479794A JP H0771091 A JPH0771091 A JP H0771091A
- Authority
- JP
- Japan
- Prior art keywords
- outer layer
- fibers
- rod
- layer
- laminated structure
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連続繊維プラスチック
（ＦＲＰ）製の棒状材料（ロッド、撚合体等）を定着、
又は接合するための連続繊維プラスチック製の管体及び
その使用方法に関する。BACKGROUND OF THE INVENTION The present invention fixes a rod-shaped material (rod, twisted body, etc.) made of continuous fiber plastic (FRP),
Alternatively, the present invention relates to a continuous fiber plastic tube for joining and a method of using the same.
【０００２】[0002]
【従来の技術】従来、連続繊維プラスチック（ＦＲＰ）
製の棒状材料（ロッド、撚合体等）のソケットに、その
材料として金属製のものが用いられることは知られてい
る（例えば、特開平１−２７２８８９号公報、２頁左下
欄１０〜１１行）。連続繊維プラスチック（ＦＲＰ）製
の棒状材料は、カッター等による切削性、リニアモータ
ーカーのガイドウェイ等における非磁性、或いは腐食環
境下での耐蝕性に適合しているのに、その棒状材料を定
着、又は接合するソケットにつき金属製の材料を使用す
ることは、好適であるとはいえない。ソケットに、棒状
材料と同じく、連続繊維プラスチックを用いるものとし
て、１９９２．４．２０の土木学会「連続繊維補強材の
コンクリート構造物への適用に関するシンポジウム」の
論文「膨張材を用いた連続繊維緊張材定着法の現場施工
への適用検討」（本文献における３．４の記述、及び図
−６）が知られている。この技術は、図７において示す
ように、ノンメタリック定着具１３としてＦＲＰにより
試作した試験材の概要を示し、その試験材の定着具１３
は、芯である線材１４を膨張材１５を介して覆い、内か
ら外への順にスパイラル状ＣＦＲＰ１６、より線状ＣＦ
ＲＰ１７、スパイラル状ＣＦＲＰ１８が配されている。2. Description of the Related Art Conventionally, continuous fiber plastic (FRP)
It is known that a socket made of a rod-shaped material (rod, twisted body, etc.) made of metal is made of metal (for example, JP-A 1-272889, page 2, lower left column, lines 10 to 11). ). The rod-shaped material made of continuous fiber plastic (FRP) is suitable for machinability with a cutter, non-magnetic in guideways of linear motor cars, and corrosion resistance in corrosive environments, but the rod-shaped material is fixed Or, the use of metallic materials for the mating sockets is not preferred. As in the case of using a continuous fiber plastic for the socket, as in the case of the rod-shaped material, a paper “Continuous fiber tension using an expansive material” in the 1992.20. Examination of application of material fixing method to on-site construction "(the description of 3.4 in this document and Fig. 6) is known. As shown in FIG. 7, this technique shows an outline of a test material prototyped by FRP as the non-metallic fixing tool 13, and the fixing tool 13 for the test material is shown.
Covers the core wire 14 through the expansive material 15, and the spiral CFRP 16 and the stranded CF are arranged in order from the inside to the outside.
The RP 17 and the spiral CFRP 18 are arranged.
【０００３】[0003]
【発明が解決しようとする課題】ところで、前記の論文
では、連続繊維補強材を複数の層で構成する場合に、膨
張材と相まって、棒状材料の軸方向の力を伝達するため
にそれぞれの層の果たす役割について考察が示されてい
ない。そのためか、棒状材料の軸方向の力に対して最も
抵抗できるより線状ＣＦＲＰ１７を最も内層とせず、二
つのスパイラル状ＣＦＲＰ１６、１８に挟んで配してい
ることからみて、ノンメタリック定着具１３を構成する
それぞれの層の補強繊維の方向性について特に着目され
ず、また考慮も払われていない。かかる試験材を、その
まま実用に供するには問題を伴うことがあるといえる。By the way, in the above-mentioned paper, in the case where the continuous fiber reinforcing material is constituted by a plurality of layers, each layer is combined with the expansion material to transmit the axial force of the rod-shaped material. No consideration is given to the role played by. Perhaps because of this, the non-metallic fixing tool 13 is considered to have the stranded linear CFRP 17 that is most resistant to the axial force of the rod-shaped material as the innermost layer and is sandwiched between the two spiral CFRPs 16 and 18. No particular attention has been paid to the directionality of the reinforcing fibers in each of the constituent layers, nor has it been taken into consideration. It can be said that there is a problem in using such a test material as it is for practical use.
【０００４】連続繊維補強プラスチック製の棒状材料を
接合、又は定着するための連続繊維補強プラスチック製
の管体が、膨張性充填材による膨張圧力と連続繊維補強
プラスチック製の棒状材料から伝えられる管軸引張力を
効果的に負担するための各層の役割、そして補強繊維の
方向性について、本発明者は着目し、そこからの知見に
基づいて本発明を創案した。本発明は、切削性、非磁
性、及び耐蝕性について全く支障なく、しかも本体であ
る連続繊維補強プラスチック製の棒状材料の受ける軸方
向の力に対して充分抵抗できる連続繊維補強プラスチッ
ク製の管体及びその使用方法を提供することを目的とす
る。A continuous fiber-reinforced plastic pipe body for joining or fixing a continuous fiber-reinforced plastic rod-shaped material is provided with an expanding pressure by an expansive filler and a pipe shaft transmitted from the continuous fiber-reinforced plastic rod-shaped material. The present inventor has paid attention to the role of each layer to effectively bear the tensile force and the directionality of the reinforcing fiber, and has devised the present invention based on the findings therefrom. DISCLOSURE OF THE INVENTION The present invention is a tubular body made of continuous fiber reinforced plastic that has no problems with respect to machinability, non-magnetism, and corrosion resistance and can sufficiently resist the axial force received by the rod-shaped material made of continuous fiber reinforced plastic, which is the main body. And to provide a method of using the same.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するため
に、本発明は、主として管軸方向に作用する力に抵抗す
る繊維を配した内層と、主として円周方向に作用する力
に抵抗する繊維を配した外層との積層構造を有し、連続
繊維補強プラスチック製の棒状材料の接合又は定着に用
いる連続繊維補強プラスチック製の管体に係る。本発明
において、連続繊維補強プラスチック製の管体の受ける
膨張性充填材による膨張圧力と連続繊維補強プラスチッ
ク製の棒状材料から伝えられる管軸引張力に対して、内
層と外層との二つの積層によって対抗する。このことを
説明すると、単一の層により連続繊維補強プラスチック
製の管体を形成し、管軸方向（α＝０°方向、αについ
ては、図３参照）にのみ繊維を配した場合には、膨張性
充填材により発生する膨張圧力が作用すると、管には円
周方向の引張力が作用するため、この円周方向の引張力
に抵抗できず、管は破裂する。また、円周方向（α＝９
０°方向）にのみ繊維を配した場合には、膨張性充填材
により発生する膨張圧力により、棒状材料と管体を一体
化させることは可能であるが、棒状材料に引張力が作用
し、この引張力が管体に作用すると、管体は管軸方向の
引張力に抵抗することができず破断する。In order to achieve the above object, the present invention resists a force acting mainly in the axial direction of the tube and an inner layer having fibers arranged therein, and a force acting mainly in the circumferential direction. The present invention relates to a tubular body made of continuous fiber reinforced plastic, which has a laminated structure with an outer layer in which fibers are arranged and is used for joining or fixing rod-shaped materials made of continuous fiber reinforced plastic. In the present invention, with respect to the expansion pressure due to the expansive filler that the tubular body made of continuous fiber reinforced plastic receives and the pipe axial tensile force transmitted from the rod-shaped material made of continuous fiber reinforced plastic, two layers of the inner layer and the outer layer are laminated. Oppose. Explaining this, when a continuous fiber-reinforced plastic tube is formed from a single layer and fibers are arranged only in the tube axis direction (α = 0 ° direction, for α, see FIG. 3), When the expansion pressure generated by the expansive filler acts, a tensile force in the circumferential direction acts on the tube, so that the tensile force in the circumferential direction cannot be resisted and the tube bursts. In the circumferential direction (α = 9
When the fibers are arranged only in the 0 ° direction), it is possible to integrate the rod-shaped material and the tubular body by the expansion pressure generated by the expandable filler, but a tensile force acts on the rod-shaped material, When this tensile force acts on the tubular body, the tubular body cannot withstand the tensile force in the axial direction of the tube and is broken.
【０００６】本発明においては、図１（イ）に示すごと
く、連続繊維補強プラスチック製の管体１は内層２と外
層３の二つの積層を配し、この積層は、主として管軸方
向に作用する力に抵抗する繊維を配した内層２と、主と
して円周方向に作用する力に抵抗する繊維を配した外層
３により形成される積層による。この配置を図１（ロ）
のごとく逆にし、主として円周方向に作用する力に抵抗
する繊維を配した方を内層４にし、主として管軸方向に
作用する力に抵抗する繊維を配した方を外層５とする
と、内層４に膨張力と引張力とが同時に作用することと
なり、この場合の外層５に引張力は有効に伝達されず、
内層４と外層５間で剥離を生じ、管体は継手性能を発揮
することはできない。かかる知見により、本発明におい
ては、内層と外層とを上述のように配する。なお、内層
と外層の二層ということについて述べたが、このことは
本発明は二層に限定することを意味するものではない。
すなわち、上述した二層の外方に、同じ配置の順序で、
主として管軸方向に作用する力に抵抗する繊維を配した
内層と、主として円周方向に作用する力に抵抗する繊維
を配した外層との二つの層を、繰り返して付加的に積層
する等の場合も、本発明の適用、実施の範囲に属する。
連続繊維補強プラスチック製の管体に使用する繊維は、
棒状材料と同一の材料でも、異なった材料でもよいが、
炭素繊維、ガラス繊維、アラミド繊維等の繊維を用いる
ことができる。連続繊維を固化、形成するために使用す
る結合材は、エポキシ樹脂、ポリエステル樹脂、ビニエ
ステル樹脂等の樹脂を目的に合わせて選定すればよい。
連続繊維補強プラスチック製の管体は、樹脂を含侵した
連続繊維を心棒に巻き付けて形成し、心棒の中心線と連
続繊維の繊維方向を変え、作用の異なる二層以上を巻き
付けて形成する方法でもよいし、予めシート状に形成し
た連続繊維補強プラスチック製のシートを心棒に巻き付
けて形成し、心棒の中心線と連続繊維の繊維方向を変
え、作用の異なる二層以上を巻き付けて形成する方法で
もよい。In the present invention, as shown in FIG. 1 (a), a tubular body 1 made of continuous fiber reinforced plastic has two laminated layers, an inner layer 2 and an outer layer 3, which mainly act in the axial direction of the tube. By the lamination formed by the inner layer 2 in which the fibers that resist the force acting are arranged and the outer layer 3 in which the fibers that mainly resist the force acting in the circumferential direction are arranged. This arrangement is shown in Figure 1 (b).
The inner layer 4 is defined as the inner layer 4 by arranging the fibers which mainly resist the force acting in the circumferential direction as the inner layer 4, and the fiber which mainly resists the force acting in the tube axial direction as the outer layer 5. The expansion force and the tensile force simultaneously act on the, and the tensile force is not effectively transmitted to the outer layer 5 in this case,
Peeling occurs between the inner layer 4 and the outer layer 5, and the tubular body cannot exhibit the joint performance. Based on such knowledge, in the present invention, the inner layer and the outer layer are arranged as described above. Although the two layers of the inner layer and the outer layer have been described, this does not mean that the present invention is limited to the two layers.
That is, outside the two layers described above, in the same order of placement,
For example, two layers, an inner layer in which fibers that mainly resist the force acting in the tube axis direction are arranged and an outer layer in which fibers that mainly resist the force acting in the circumferential direction are arranged, are repeatedly laminated. The case also belongs to the scope of application and implementation of the present invention.
Fibers used for continuous fiber reinforced plastic tubes are
Although it may be the same material as the rod-shaped material or a different material,
Fibers such as carbon fiber, glass fiber and aramid fiber can be used. The binder used for solidifying and forming the continuous fiber may be selected from resins such as epoxy resin, polyester resin, vinyl ester resin, etc., depending on the purpose.
A continuous fiber-reinforced plastic tube is formed by winding resin-impregnated continuous fibers around a mandrel, changing the center line of the mandrel and the fiber direction of the continuous fibers, and winding two or more layers with different functions. Alternatively, a continuous fiber reinforced plastic sheet that has been formed into a sheet beforehand may be wound around the mandrel, the center line of the mandrel and the fiber direction of the continuous fibers may be changed, and two or more layers having different functions may be wound around the mandrel. But it's okay.
【０００７】また、本発明は、内層に配した繊維の管軸
方向に対する角度αを、―４５°≦α≦４５°、外層に
配した繊維の管軸方向に対する角度αを、―４５°＞α
≧―９０°又は４５°＜α≦９０°とした請求項１記載
の連続繊維補強プラスチック製の管体に係る。本発明
は、請求項１の発明における内層、或いは外層内での繊
維の方向を具体的にしたものである。ここで、αは、図
３において示すように、内層、又は外層に配した繊維の
管軸方向に対する角度であり、正確には、繊維が巻かれ
んとする接平面で、繊維と管体の軸方向とのなす角度で
ある。また、各層の繊維の方向は、必ずしも単一の方向
ではなく、上述の範囲である限り、例えばＦＷ法（フィ
ラメント ワインディング法）による場合のように、同
じ層でも＋５°と―５°との二つの方向によって、連続
繊維補強プラスチックの層が形成される場合もあり、そ
れを含む。According to the present invention, the angle α of the fibers arranged in the inner layer with respect to the tube axis direction is −45 ° ≦ α ≦ 45 °, and the angle α of the fibers arranged in the outer layer with respect to the tube axis direction is −45 °> α
The pipe body made of continuous fiber reinforced plastic according to claim 1, wherein ≧ −90 ° or 45 ° <α ≦ 90 °. The present invention embodies the direction of fibers in the inner layer or the outer layer in the first aspect of the invention. Here, α is the angle with respect to the tube axis direction of the fibers arranged in the inner layer or the outer layer, as shown in FIG. 3, and more precisely, the tangential plane around which the fibers are wound, and the axis of the fiber and the tube body. It is the angle with the direction. Also, the direction of the fibers in each layer is not necessarily a single direction, and as long as it is within the above range, for example, as in the case of the FW method (filament winding method), the same layer has two directions of + 5 ° and −5 °. In some cases, and inclusive, a layer of continuous fiber reinforced plastic is formed in one direction.
【０００８】また、本発明は、主として管軸方向に作用
する力に抵抗する繊維を配した内層と、主として円周方
向に作用する力に抵抗する繊維を配した外層との積層構
造の外周に接して、主として管軸方向に作用する力に抵
抗する繊維を配した内層と、主として円周方向に作用す
る力に抵抗する繊維を配した外層との積層構造を付加し
て設け、それぞれの内層に配した繊維の管軸方向に対す
る角度αを、―４５°≦α≦４５°、それぞれの外層に
配した繊維の管軸方向に対する角度αを、―４５°＞α
≧―９０°又は４５°＜α≦９０°とした連続繊維補強
プラスチック製の管体に係る。内層と外層からなる内側
の積層構造の外に外側の積層構造を設けることにより、
連続繊維補強プラスチック製の管体としての完全性を期
するためである。Further, according to the present invention, the outer periphery of the laminated structure of an inner layer having fibers that mainly resist the force acting in the axial direction of the tube and an outer layer having fibers that mainly resist the force acting in the circumferential direction are arranged. In contact with each other, an inner layer in which fibers that mainly resist the force acting in the pipe axis direction are arranged and an outer layer in which fibers that mainly resist the force acting in the circumferential direction are arranged are additionally provided, and each inner layer The angle α of the fibers arranged in the tube with respect to the tube axis direction is −45 ° ≦ α ≦ 45 °, and the angle α of the fibers arranged in each outer layer with respect to the tube axis direction is −45 °> α
The present invention relates to a tubular body made of continuous fiber reinforced plastic with ≧ −90 ° or 45 ° <α ≦ 90 °. By providing the outer laminated structure outside the inner laminated structure composed of the inner layer and the outer layer,
This is for the purpose of ensuring the integrity as a tubular body made of continuous fiber reinforced plastic.
【０００９】また、本発明は、上述した内層及び、又は
外層を一層でなく、二層、若しくはそれ以上の複数層に
細分し、該細分された層に配された繊維の管体の軸線に
対する角度αが該細分された層間で同一又は相異なる連
続繊維補強プラスチック製の管体に係る。また、本発明
は、上述した連続繊維補強プラスチック製の管体と該管
体に挿入した棒状材料の端部間に膨張性充填材を充填
し、該棒状材料を定着又は接合する連続繊維補強プラス
チック製の管体の使用方法に係る。ここで、定着とは、
棒状材料を管体を介して、構造物、基礎等の他の物に固
定する場合であり、また接合とは、管体を介して、二つ
の棒状体を相互に固定する場合（図４参照）である。Further, the present invention subdivides the above-mentioned inner layer and / or outer layer into not only one layer but into two or more layers, and to the axis of the tubular body of the fiber arranged in the subdivided layer. The present invention relates to a tubular body made of continuous fiber reinforced plastic whose angle α is the same or different between the subdivided layers. Further, the present invention is a continuous fiber reinforced plastic for filling or expanding the rod-shaped material by filling an expansive filler between the tubular body made of the above-mentioned continuous fiber-reinforced plastic and the ends of the rod-shaped material inserted into the tubular body. It relates to the method of use of the tubular body. Here, fixing means
When a rod-shaped material is fixed to another object such as a structure or foundation via a pipe, and joining is a case where two rods are fixed to each other via a pipe (see FIG. 4). ).
【００１０】本発明において、上述したように、内層と
外層とからなる内側の積層構造の外周に接して、内層と
外層とからなる外側の積層構造を付加して設ける場合、
該内側の積層構造における外層の円周方向の弾性率を該
外側の積層構造における外層の円周方向の弾性率より低
い値とすることが好ましい。積層構造の外層間での円周
方向の応力の均一化を図るためである。本発明の管体の
材料は、上述したごとく、エポキシ樹脂等内に炭素繊維
等を配設したものであるので、繊維の配設方向の力に対
しては補強が施されている。すなわち、本発明の管体に
おいて内層は主として管軸方向に作用する力に対して、
また外層は主として円周方向に作用する力に対して対抗
する。ところが、本発明者は種々研究を重ねた結果、管
体の厚み方向には補強が施されていないため、内側の積
層構造の外層ほど大きい引張力が働き、外側の積層構造
の外層に比し負担が集中することになることが判明し
た。より内側の積層構造の外層における引張力を緩和す
ることが、管体全体の強度を確保するための支配的要因
となる。この方策として、内側の積層構造における外層
の円周方向の弾性率を、外側の積層構造における外層の
円周方向の弾性率より低い値とする。弾性率を低い値と
するには、積層構造の外層につき、繊維の種類を変えて
もよく、また同一系統（例えば、炭素繊維系）の繊維で
弾性率を変えてもよい。ここで、図５により、内層Ｋ
１、外層Ｓ１の内側の積層構造の外周に内層Ｋ２、外層
Ｓ２の外側の積層構造を付加して設けた場合を示す。図
５において、□印は内層Ｋ１とＫ２の管軸方向の弾性
率、及び外層Ｓ１とＳ２の円周方向の弾性率を同じく２
６０００ｋｇｆ／ｍｍ2 とした場合（ケース１）の円周
方向の応力、そして＋印は内層Ｋ１とＫ２の管軸方向の
弾性率、及び外層Ｓ２の円周方向の弾性率を同じく２６
０００ｋｇｆ／ｍｍ2 とし、外層Ｓ１の円周方向の弾性
率を１３０００ｋｇｆ／ｍｍ2 とした場合（ケース２）
の円周方向の応力を示す。図５が示すように、外層Ｓ１
の弾性率を外層Ｓ２の弾性率より小さくすることによ
り、外層Ｓ１の円周方向の応力は緩和され、外層Ｓ１と
Ｓ２間で応力の均一化が図られる。外層の円周方向の弾
性率は、円周方向に作用する力に抵抗する繊維の巻き付
け角度、また繊維の体積率によっても変え、低くするこ
とができる。内層に配した繊維の管軸方向に対する角度
α、外層に配した繊維の管軸方向に対する角度αについ
ては上述したと同様である。In the present invention, as described above, when the outer laminated structure composed of the inner layer and the outer layer is additionally provided in contact with the outer periphery of the inner laminated structure composed of the inner layer and the outer layer,
It is preferable that the elastic modulus in the circumferential direction of the outer layer in the inner laminated structure is lower than the elastic modulus in the circumferential direction of the outer layer in the outer laminated structure. This is to make the stress in the circumferential direction uniform between the outer layers of the laminated structure. As described above, the material of the tubular body of the present invention is such that carbon fiber or the like is disposed in epoxy resin or the like, so that it is reinforced against the force in the fiber disposing direction. That is, in the tube body of the present invention, the inner layer is mainly for the force acting in the tube axis direction,
Further, the outer layer mainly opposes the force acting in the circumferential direction. However, as a result of various researches conducted by the present inventor, since the tubular body is not reinforced in the thickness direction, a larger tensile force is exerted on the outer layer of the inner laminated structure, compared to the outer layer of the outer laminated structure. It turns out that the burden will be concentrated. Relaxing the tensile force in the outer layer of the inner layer structure is a dominant factor for ensuring the strength of the entire tubular body. As a measure for this, the elastic modulus in the circumferential direction of the outer layer in the inner laminated structure is set to a value lower than the elastic modulus in the circumferential direction of the outer layer in the outer laminated structure. To reduce the elastic modulus, the type of fiber may be changed for the outer layer of the laminated structure, or the elastic modulus may be changed for fibers of the same system (for example, carbon fiber system). Here, referring to FIG. 5, the inner layer K
1 shows the case where the inner layer K2 and the outer layer S2 outer layered structure is added to the outer periphery of the layered structure inside the outer layer S1. In FIG. 5, □ indicates the elastic moduli of the inner layers K1 and K2 in the axial direction of the tube and the elastic moduli of the outer layers S1 and S2 in the circumferential direction of 2 respectively.
When the stress is 6000 kgf / mm 2 (case 1), the stress in the circumferential direction is the same, and the + sign indicates the elastic modulus in the axial direction of the inner layers K1 and K2 and the elastic modulus in the circumferential direction of the outer layer S2.
000 kgf / mm 2 and the elastic modulus in the circumferential direction of the outer layer S1 is 13000 kgf / mm 2 (case 2)
Shows the stress in the circumferential direction of. As shown in FIG. 5, the outer layer S1
By making the elastic modulus of the outer layer smaller than that of the outer layer S2, the stress in the circumferential direction of the outer layer S1 is relaxed, and the stress is made uniform between the outer layers S1 and S2. The elastic modulus in the circumferential direction of the outer layer can be lowered by changing the winding angle of the fiber that resists the force acting in the circumferential direction and the volume ratio of the fiber. The angle α of the fibers arranged in the inner layer with respect to the tube axis direction and the angle α of the fibers arranged in the outer layer with respect to the tube axis direction are the same as described above.
【００１１】本発明において、積層構造の外層を複数層
に細分された層とする場合、内側の方の層の円周方向の
弾性率を外側の方の層の円周方向の弾性率より低い値と
することが好ましい。細分された層により形成される外
層内での円周方向の応力の均一化を図るためである。こ
こで、図６により、管体を内層Ｋと外層Ｓとの積層構造
とし、外層Ｓを二つの層に細分した場合を示す。図６に
おいて、実線は内層Ｋの管軸方向の弾性率、及び外層Ｓ
の円周方向の弾性率を同じく２６０００ｋｇｆ／ｍｍ2
とした場合の円周方向の応力、点線は内層Ｋの管軸方向
の弾性率を２６０００ｋｇｆ／ｍｍ2、及び外層Ｓの細
分された内側の層（中心２６ｍｍ〜２９ｍｍ）の円周方
向の弾性率を１３０００ｋｇｆ／ｍｍ2 とし、外側の層
（２９ｍｍ〜３２ｍｍ）の円周方向の弾性率を２６００
０ｋｇｆ／ｍｍ2 とした場合の円周方向の応力を示す。
図６が示すように、外層Ｓの内側の層の弾性率を外側の
層の弾性率より小さくすることにより、外層Ｓの内縁側
の円周方向の応力は緩和され、外層Ｓ内で応力の均一化
が図られる。なお、このように弾性率を小さくすること
は、内層・外層の積層構造を同心的に２以上付加して設
ける場合、より内側の積層構造の外層ほど、適用するこ
とが効果的である。In the present invention, when the outer layer of the laminated structure is a layer subdivided into a plurality of layers, the elastic modulus in the circumferential direction of the inner layer is lower than the elastic modulus in the circumferential direction of the outer layer. A value is preferable. This is because the stress in the circumferential direction is made uniform in the outer layer formed by the subdivided layers. Here, FIG. 6 shows a case where the tubular body has a laminated structure of an inner layer K and an outer layer S, and the outer layer S is subdivided into two layers. In FIG. 6, the solid line indicates the elastic modulus of the inner layer K in the tube axis direction and the outer layer S.
The elastic modulus in the circumferential direction of 26000 kgf / mm 2
In the circumferential direction, the dotted line indicates the elastic modulus in the tube axis direction of the inner layer K of 26000 kgf / mm 2 , and the elastic modulus of the outer layer S in the circumferential direction of the subdivided inner layer (center 26 mm to 29 mm). Is 13000 kgf / mm 2, and the elastic modulus in the circumferential direction of the outer layer (29 mm to 32 mm) is 2600.
The stress in the circumferential direction when 0 kgf / mm 2 is shown.
As shown in FIG. 6, by making the elastic modulus of the inner layer of the outer layer S smaller than the elastic modulus of the outer layer, the stress in the circumferential direction on the inner edge side of the outer layer S is relaxed, and the stress in the outer layer S is reduced. Uniformity is achieved. It should be noted that the reduction of the elastic modulus in this way is effective when the inner layer / outer layer laminated structure is concentrically provided with two or more layers, the outer layer of the inner laminated structure is applied.
【００１２】[0012]
【作用】本発明では、連続繊維補強プラスチック製の管
体において、主として管軸方向に作用する力に抵抗する
繊維を配した内層と、主として円周方向に作用する力に
抵抗する繊維を配した外層との積層構造を有することに
より、外層は膨張性充填材の膨張圧力に対抗して内層を
管軸の中心方向に押圧して棒状材料に対して軸方向の動
きを確実に拘束し、内層は棒状材料の軸力を、一方の棒
状材料から他方の棒状材料に確実に伝達できるようにす
る。また、内層・外層の積層構造の外周に接して、内層
・外層の積層構造を付加して設けた場合、内側の積層構
造の外層の円周方向の弾性率を外側の積層構造における
外層の円周方向の弾性率より小さくすると、外層間での
円周方向の応力が均一化を図する。また、積層構造の外
層を複数層に細分した層とする場合、内側の方の層の円
周方向の弾性率を外側の方の層の円周方向の弾性率より
小さくすると、外層内の円周方向の応力が均一化する。According to the present invention, in a tubular body made of continuous fiber reinforced plastic, an inner layer having fibers that mainly resist the force acting in the axial direction and a fiber that mainly resists the forces acting circumferentially are arranged. By having a laminated structure with the outer layer, the outer layer counteracts the expansion pressure of the expansive filler and presses the inner layer toward the center of the tube axis to securely restrain the axial movement of the rod-shaped material. Ensures that the axial force of the rod-shaped material can be transmitted from one rod-shaped material to the other rod-shaped material. In addition, when the inner layer / outer layer laminated structure is provided in contact with the outer periphery of the inner layer / outer layer laminated structure, the elastic modulus in the circumferential direction of the outer layer of the inner layered structure is the outer layer of the outer layer of the outer layered structure. When the elastic modulus is smaller than the elastic modulus in the circumferential direction, the stress in the circumferential direction between the outer layers is made uniform. Also, when the outer layer of the laminated structure is divided into multiple layers, if the elastic modulus in the circumferential direction of the inner layer is made smaller than the elastic modulus in the circumferential direction of the outer layer, the circle in the outer layer The stress in the circumferential direction becomes uniform.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面を参照して説明
する。 （実施例１）連続繊維プラスチック製の棒状材料は、炭
素繊維で補強された７本を撚り合わせて呼び径φ１２．
５ｍｍとしたものである。図１（イ）において、棒状材
料を結合する管体１は、エポキシ樹脂を含浸させた炭素
繊維からなり、内径φ２５ｍｍ、外径φ３５ｍｍ、長さ
４００ｍｍである。主として管軸方向に作用する力に抵
抗する繊維を配した内層２の厚みは、２．５ｍｍであ
り、また主として円周方向に作用する力に抵抗する繊維
を配した外層３の厚みは、２．５ｍｍである。ここで、
繊維の管軸方向に対する角度αは、内層で０°、外層で
９０°である。図４に示すごとく、該管体の両端から前
記棒状材料１０、１１を挿入し、管体１と棒状材料１
０、１１の間に膨張性充填材１２として静的破砕材を充
填し、棒状材料１０、１１を接合した。本実施例につ
き、引張試験を行い、その結果耐力は１４．２ｔであ
り、棒状材料は破断したが、管体は健全であった。な
お、図１（ロ）に示すごとく、比較のため、繊維の管軸
方向に対する角度αにつき、内層と外層の関係を上述と
は逆にする外は条件を同じくして、内層４、外層５の管
体１を製作し、試験したが、その結果耐力は５．８ｔで
あり、内層が破断し、棒状材料は抜け出した。Embodiments of the present invention will be described below with reference to the drawings. (Example 1) A rod-shaped material made of continuous fiber plastic was obtained by twisting seven carbon fiber-reinforced rods into a nominal diameter of 12.
It is 5 mm. In FIG. 1 (a), a tubular body 1 for joining rod-shaped materials is made of carbon fiber impregnated with epoxy resin, and has an inner diameter of 25 mm, an outer diameter of 35 mm, and a length of 400 mm. The thickness of the inner layer 2 in which fibers that mainly resist the force acting in the axial direction is 2.5 mm, and the thickness of the outer layer 3 in which fibers that mainly resist the forces acting in the circumferential direction are 2 are It is 0.5 mm. here,
The angle α of the fiber with respect to the tube axis direction is 0 ° in the inner layer and 90 ° in the outer layer. As shown in FIG. 4, the rod-shaped material 10 and the rod-shaped material 1 are inserted from both ends of the pipe, and the pipe 1 and the rod-shaped material 1 are inserted.
A static crushing material was filled as the expansive filler 12 between 0 and 11 to join the rod-shaped materials 10 and 11. A tensile test was conducted on this example. As a result, the yield strength was 14.2 t, and although the rod-shaped material was broken, the tubular body was sound. For comparison, as shown in FIG. 1B, the inner layer 4 and the outer layer 5 are the same except that the relationship between the inner layer and the outer layer is reversed with respect to the angle α of the fiber with respect to the tube axis direction. The tubular body 1 was manufactured and tested. As a result, the yield strength was 5.8 tons, the inner layer broke, and the rod-shaped material came out.
【００１４】（実施例２）連続繊維プラスチック製の棒
状材料は、炭素繊維で補強された３７本を撚り合わせて
呼び径φ３０．０ｍｍとしたものである。図１（イ）に
おいて、棒状材料を結合する管体１は、エポキシ樹脂を
含浸させた炭素繊維からなり、内径φ４０ｍｍ、外径φ
６０ｍｍ、長さ６００ｍｍである。主として管軸方向に
作用する力に抵抗する繊維を配した内層２の厚みは、６
ｍｍであり、また主として円周方向に作用する力に抵抗
する繊維を配した外層３の厚みは、４ｍｍである。ここ
で、繊維の管軸方向に対する角度αは、内層で＋５°、
−５°、外層で＋８９．７°、−８９．７°である。図
４に示すごとく、該管体の両端から前記棒状材料１０、
１１を挿入し、管体１と棒状材料１０、１１の間に膨張
性充填材１２として静的破砕材を充填し、棒状材料１
０、１１を接合した。本実施例につき、引張試験を行
い、その結果耐力は５０．３ｔであり、棒状材料は破断
したが、管体は健全であった。なお、図１（ロ）に示す
ごとく、比較のため、繊維の管軸方向に対する角度αに
つき、内層と外層の関係を上述とは逆にする外は条件を
同じくして、内層４、外層５の管体１を製作し、試験し
たが、その結果耐力は３２．５ｔであり、内層が破断
し、棒状材料は抜け出した。Example 2 A rod-shaped material made of continuous fiber plastic is obtained by twisting 37 carbon fiber reinforced rods into a nominal diameter of 30.0 mm. In FIG. 1 (a), a tubular body 1 for joining rod-shaped materials is made of carbon fiber impregnated with epoxy resin, and has an inner diameter of 40 mm and an outer diameter of φ.
The length is 60 mm and the length is 600 mm. The thickness of the inner layer 2 in which the fibers that mainly resist the force acting in the tube axis direction are arranged is 6
mm, and the thickness of the outer layer 3 on which the fibers that mainly resist the force acting in the circumferential direction are arranged is 4 mm. Here, the angle α of the fiber with respect to the tube axis direction is + 5 ° in the inner layer,
-5 °, + 89.7 ° and -89.7 ° in the outer layer. As shown in FIG. 4, the rod-shaped material 10,
11 is inserted, and a static crushing material is filled as the expansive filler 12 between the tube body 1 and the rod-shaped materials 10 and 11,
0 and 11 were joined. A tensile test was conducted on this example. As a result, the yield strength was 50.3 t, and although the rod-shaped material broke, the tubular body was sound. For comparison, as shown in FIG. 1B, the inner layer 4 and the outer layer 5 are the same except that the relationship between the inner layer and the outer layer is reversed with respect to the angle α of the fiber with respect to the tube axis direction. The tube body 1 of No. 1 was manufactured and tested. As a result, the yield strength was 32.5 t, the inner layer was broken, and the rod-shaped material came out.
【００１５】（実施例３）連続繊維プラスチック製の棒
状材料は、炭素繊維で補強された３７本を撚り合わせて
呼び径φ３０．０ｍｍとしたものである。棒状材料を結
合する管体１は、ポリエステル樹脂を含浸させたガラス
繊維からなり、内径φ４０ｍｍ、外径φ６０ｍｍ、長さ
６００ｍｍである。主として管軸方向に作用する力に抵
抗する繊維を配した内層２の厚みは、６ｍｍであり、ま
た主として円周方向に作用する力に抵抗する繊維を配し
た外層３の厚みは、４ｍｍである。ここで、繊維の管軸
方向に対する角度αは、内層で＋５°、−５°、外層で
＋８９．７°、−８９．７°である。該管体の両端から
前記棒状材料１０、１１を挿入し、管体と棒状材料の間
にエポキシ系の樹脂の接着剤を充填し、棒状材料を接合
した。本実施例につき、引張試験を行い、その結果耐力
は４９．５ｔであり、棒状材料は破断したが、管体は健
全であった。(Embodiment 3) A rod-shaped material made of continuous fiber plastic is obtained by twisting 37 carbon fiber-reinforced rods into a nominal diameter of 30.0 mm. The tubular body 1 for bonding the rod-shaped material is made of glass fiber impregnated with polyester resin, and has an inner diameter of 40 mm, an outer diameter of 60 mm and a length of 600 mm. The thickness of the inner layer 2 in which the fibers that mainly resist the force acting in the tube axis direction is 6 mm, and the thickness of the outer layer 3 in which the fibers that mainly resist the force acting in the circumferential direction are 4 mm are 4 mm. . Here, the angles α of the fibers with respect to the tube axis direction are + 5 ° and −5 ° in the inner layer and + 89.7 ° and −89.7 ° in the outer layer. The rod-shaped materials 10 and 11 were inserted from both ends of the tubular body, and an epoxy resin adhesive was filled between the tubular body and the rod-shaped material to bond the rod-shaped materials. A tensile test was conducted on this example. As a result, the yield strength was 49.5 t, and although the rod-shaped material was broken, the tubular body was sound.
【００１６】（実施例４）図２において、内層６と、外
層７との積層構造の外周に接して、同じく主として管軸
方向に作用する力に抵抗する繊維を配した内層８と、主
として円周方向に作用する力に抵抗する繊維を配した外
層９との積層構造を付加して設けた場合について実施し
た。連続繊維プラスチック製の棒状材料は、炭素繊維で
補強された３７本を撚り合わせて呼び径φ３０ｍｍとし
たものである。棒状材料を結合する管体は、エポキシ樹
脂を含浸させた炭素繊維からなり、内径φ４０ｍｍ、外
径φ６０ｍｍ、長さ６００ｍｍである。主として管軸方
向に作用する力に抵抗する繊維を配した内層の厚みは、
３ｍｍ（内側の内層６）、３ｍｍ（外側の内層８）であ
り、また主として円周方向に作用する力に抵抗する繊維
を配した外層の厚みは、２ｍｍ（内側の外層７）、２ｍ
ｍ（外側の外層９）である。ここで、繊維の管軸方向に
対する角度αは、内層で＋５°、−５°（内側の内層
６）、＋５°、−５°（外側の内層８）、外層で＋８
９．７°、−８９．７°（内側の外層７）、＋８９．７
°、−８９．７°（外側の外層９）である。該管体の両
端から前記棒状材料１０、１１を挿入し、管体と棒状材
料の間に膨張性充填材として静的破砕材を充填し、棒状
材料を接合した。本実施例につき、引張試験を行い、そ
の結果耐力は５３．２ｔであり、棒状材料は破断した
が、管体は健全であった。なお、比較のため、繊維の管
軸方向に対する角度αにつき、二つの積層構造内での内
層と外層の関係を逆にする外は条件を同じくして、管体
を製作し、試験したが、その結果耐力は２０．７ｔであ
り、最内層が破断し、棒状材料は抜け出した。(Embodiment 4) In FIG. 2, an inner layer 8 which is in contact with the outer periphery of a laminated structure of an inner layer 6 and an outer layer 7 and also has a fiber which mainly resists a force acting mainly in the axial direction of the tube, and a circle This was carried out for the case where a laminated structure with the outer layer 9 in which fibers that resist the force acting in the circumferential direction were arranged was additionally provided. The rod-shaped material made of continuous fiber plastic is obtained by twisting 37 carbon fiber reinforced rods into a nominal diameter of 30 mm. The tubular body for connecting the rod-shaped material is made of carbon fiber impregnated with epoxy resin, and has an inner diameter of 40 mm, an outer diameter of 60 mm and a length of 600 mm. The thickness of the inner layer, in which the fibers that resist the force acting mainly in the pipe axis direction are arranged,
3 mm (inner layer 6 on the inner side), 3 mm (inner layer 8 on the outer side), and the thickness of the outer layer on which fibers that mainly resist the force acting in the circumferential direction are arranged is 2 mm (inner outer layer 7) and 2 m.
m (outer outer layer 9). Here, the angle α of the fiber with respect to the tube axis direction is + 5 ° in the inner layer, −5 ° (inner inner layer 6), + 5 °, −5 ° (outer inner layer 8), and +8 in the outer layer.
9.7 °, -89.7 ° (inner outer layer 7), +89.7.
And -89.7 ° (outer outer layer 9). The rod-shaped materials 10 and 11 were inserted from both ends of the tubular body, and a static crushing material as an expansive filler was filled between the tubular body and the rod-shaped material to join the rod-shaped materials. A tensile test was conducted on this example. As a result, the yield strength was 53.2 t, and although the rod-shaped material was broken, the tubular body was sound. For comparison, with respect to the angle α of the fiber with respect to the tube axis direction, the tube was produced and tested under the same conditions except that the relationship between the inner layer and the outer layer in the two laminated structures was reversed. As a result, the proof stress was 20.7 t, the innermost layer was broken, and the rod-shaped material came out.
【００１７】（実施例５）積層構造内での内層と外層と
を、それぞれ細分して、内層を二つの層、外層を二つの
層とした態様について実施例した。連続繊維プラスチッ
ク製の棒状材料は、炭素繊維で補強された３７本を撚り
合わせて呼び径φ３０ｍｍとしたものである。棒状材料
を結合する管体１は、エポキシ樹脂を含浸させた炭素繊
維からなり、内径φ４０ｍｍ、外径φ６０ｍｍ、長さ６
００ｍｍである。主として管軸方向に作用する力に抵抗
する繊維を配した内層の厚みは、３ｍｍ（内側の層）、
２ｍｍ（外側の層）、計５ｍｍであり、また主として円
周方向に作用する力に抵抗する繊維を配した外層の厚み
は、３ｍｍ（内側）、２ｍｍ（外側）、計５ｍｍであ
る。ここで、繊維の管軸方向に対する角度αは、内層で
＋５°、−５°（内側の層）、＋１５°、−１５°（外
側の層）、外層で＋７５°、−７５°（内側）、＋８
９．７°、−８９．７°（外側）である。該管体の両端
から前記棒状材料１０、１１を挿入し、管体と棒状材料
の間に膨張性充填材として静的破砕材を充填し、棒状材
料１０、１１を接合した。本実施例につき、引張試験を
行い、その結果耐力は５１．１ｔであり、棒状材料は破
断したが、管体は健全であった。(Embodiment 5) An embodiment in which the inner layer and the outer layer in the laminated structure were subdivided into two layers, that is, the inner layer and the outer layer were two layers, was described. The rod-shaped material made of continuous fiber plastic is obtained by twisting 37 carbon fiber reinforced rods into a nominal diameter of 30 mm. The tubular body 1 for connecting the rod-shaped material is made of carbon fiber impregnated with epoxy resin and has an inner diameter of 40 mm, an outer diameter of 60 mm and a length of 6 mm.
It is 00 mm. The thickness of the inner layer, in which the fibers that mainly resist the force acting in the tube axis direction are arranged, is 3 mm (inner layer),
The thickness of the outer layer is 2 mm (outer layer), 5 mm in total, and the thickness of the outer layer on which fibers that mainly resist the force acting in the circumferential direction is arranged is 3 mm (inner side), 2 mm (outer side), and 5 mm in total. Here, the angle α of the fiber with respect to the tube axis direction is + 5 °, −5 ° (inner layer), + 15 °, −15 ° (outer layer) in the inner layer, and + 75 °, −75 ° (inner) in the outer layer. , +8
It is 9.7 ° and −89.7 ° (outside). The rod-shaped materials 10 and 11 were inserted from both ends of the tubular body, and a static crushing material was filled as an expansive filler between the tubular body and the rod-shaped materials to join the rod-shaped materials 10 and 11. A tensile test was conducted on this example. As a result, the yield strength was 51.1 t, and although the rod-shaped material was broken, the tubular body was sound.
【００１８】（実施例６）連続繊維強化プラスチック製
の棒状材料は、炭素繊維で補強された３７本を撚り合わ
せて呼び径φ３０．０ｍｍとしたものである。図１
（イ）において、棒状材料を結合する管体１は、エポキ
シ樹脂を含浸させた炭素繊維からなり、内径φ４０ｍ
ｍ、外径φ６０ｍｍ、長さ４００ｍｍである。主として
管軸方向に作用する力に抵抗する繊維を配した内層２の
厚みは６ｍｍであり、また主として円周方向に作用する
力に抵抗する繊維を配した外層３は、使用する炭素繊維
の種類を変えた円周方向の弾性率がＥ＝１３０００ｋｇ
ｆ／ｍｍ2 である厚み２ｍｍ（外層３の細分された内側
の層）と円周方向の弾性率がＥ＝２６０００ｋｇｆ／ｍ
ｍ2 である厚み２ｍｍ（外層３の細分された外側の層）
の厚み計４ｍｍである。ここで、繊維の管軸方向に対す
る角度αは、内層で＋５°、−５°、外層で＋８９．７
°、−８９．７°である。図４に示すごとく、該管体１
の両端から前記棒状材料１０、１１を挿入し、管体１と
棒状材料１０、１１の間に膨張性充填材１２として静的
破砕材を充填し、棒状材料１０、１１を接合した。本例
では、上記のごとく外層３の細分された内側の層の弾性
率を小さくして円周方向の応力の均一化が図られること
から、静的破砕材（酸化カルシウムを主成分とする膨張
材）を加熱養生して管体内の内部圧力を高めることが可
能である。本例において、静的破砕材を充填した後、２
４時間後から７２時間後まで、６０℃にて加熱養生を施
した。この加熱養生により静的破砕材によって発生する
内部圧力は１０００ｋｇｆ／ｃｍ2 となった。（因に、
弾性率を変えず、応力集中を懸念して加熱養生ができな
い場合、内部圧力は約５００ｋｇｆ／ｃｍ2 である。）
本実施例の管体につき、引張試験を行い、その結果耐力
は６０．５ｔであり、棒状材料は破断したが、管体は健
全であった。本例において、実施例２に比し４００ｍｍ
という短い管体を用いるが、加熱養生により静的破砕材
による内部応力を高め、強度的に支障なく管体の耐力を
向上することができた。(Example 6) A rod-shaped material made of continuous fiber reinforced plastic was obtained by twisting 37 carbon fiber reinforced rods into a nominal diameter of 30.0 mm. Figure 1
In (a), the tubular body 1 for connecting the rod-shaped material is made of carbon fiber impregnated with epoxy resin and has an inner diameter of 40 m.
m, outer diameter φ60 mm, and length 400 mm. The thickness of the inner layer 2 in which the fibers that mainly resist the force acting in the tube axis direction is 6 mm, and the outer layer 3 in which the fibers that mainly resist the force acting in the circumferential direction are arranged are the kind of carbon fiber to be used. The elastic modulus in the circumferential direction when E was changed to 13000 kg
A thickness of 2 mm (a subdivided inner layer of the outer layer 3) that is f / mm 2 and an elastic modulus in the circumferential direction of E = 26000 kgf / m
m 2 thickness 2 mm (the subdivided outer layer of the outer layer 3)
The total thickness is 4 mm. Here, the angle α of the fiber with respect to the tube axis direction is + 5 °, −5 ° in the inner layer and +89.7 in the outer layer.
And -89.7 °. As shown in FIG. 4, the tubular body 1
The rod-shaped materials 10 and 11 were inserted from both ends, and a static crushing material was filled as the expansive filler 12 between the tube body 1 and the rod-shaped materials 10 and 11, and the rod-shaped materials 10 and 11 were joined. In this example, as described above, the elastic modulus of the subdivided inner layer of the outer layer 3 is reduced to make the stress in the circumferential direction uniform, so that the static crushing material (expansion containing calcium oxide as a main component is expanded). It is possible to increase the internal pressure inside the pipe by heating and curing the material. In this example, after filling with the static crushing material, 2
From 4 hours to 72 hours, heat curing was performed at 60 ° C. By this heating and curing, the internal pressure generated by the statically crushed material became 1000 kgf / cm 2 . (By the way,
The internal pressure is about 500 kgf / cm 2 when the heat curing cannot be performed without concern for stress concentration without changing the elastic modulus. )
A tensile test was conducted on the pipe of this example. As a result, the yield strength was 60.5 t, and although the rod-shaped material was broken, the pipe was sound. In this example, 400 mm compared to Example 2.
Although the short tube is used, the internal stress due to the static crushed material was increased by heating and curing, and the strength of the tube could be improved without any problem in strength.
【００１９】（実施例７）図２において、内層６と、外
層７との積層構造の外周に接して、同じく主として管軸
方向に作用する力に抵抗する繊維を配した内層８と、主
として円周方向に作用する力に抵抗する繊維を配した外
層９との積層構造を付加して設けた場合について実施し
た。連続繊維プラスチック製の棒状材料は、炭素繊維で
補強された３７本を撚り合わせて呼び径φ３０ｍｍとし
たものである。棒状材料を結合する管体は、エポキシ樹
脂を含浸させた炭素繊維からなり、内径φ４０ｍｍ、外
径φ６０ｍｍ、長さ４００ｍｍである。主として管軸方
向に作用する力に抵抗する繊維を配した内層の厚みは、
３ｍｍ（内側の内層６）、３ｍｍ（外側の内層８）であ
り、また主として円周方向に作用する力に抵抗する繊維
を配した外層は、使用する炭素繊維の種類を変えた円周
方向の弾性率がＥ＝１３０００ｋｇｆ／ｍｍ2 である２
ｍｍ（内側の外層７）と、円周方向の弾性率がＥ＝２６
０００ｋｇｆ／ｍｍ2 である２ｍｍ（外側の外層９）で
ある。ここで、繊維の管軸方向に対する角度αは、内層
で＋５°、−５°（内側の内層６）、＋５°、−５°
（外側の内層８）、外層で＋７０．０°、−７０．０°
（内側の外層７）、＋８９．７°、−８９．７°（外側
の外層９）である。該管体の両端から前記棒状材料１
０、１１を挿入し、管体と棒状材料の間に膨張性充填材
として静的破砕材を充填し、棒状材料を接合した。本例
では、上記のごとく内側の外層６の弾性率を小さくして
円周方向の応力の均一化が図られることから、静的破砕
材（酸化カルシウムを主成分とする膨張材）を加熱養生
して管体内の内部圧力を高めることが可能である。本例
において、静的破砕材を充填した後、２４時間後から７
２時間後まで、６０℃にて加熱養生を施した。この加熱
養生により静的破砕材によって発生する内部圧力は１０
００ｋｇｆ／ｃｍ2 となった。（因に、弾性率を変え
ず、応力集中を懸念して加熱養生ができない場合、内部
圧力は約５００ｋｇｆ／ｃｍ2 である。）本実施例につ
き、引張試験を行い、その結果耐力は６５．２ｔであ
り、棒状材料は破断したが、管体は健全であった。本例
において、実施例４に比し４００ｍｍという短い管体を
用いるが、加熱養生により静的破砕材による内部応力を
高め、強度的に支障なく管体の耐力を向上することがで
きた。(Embodiment 7) In FIG. 2, an inner layer 8 which is in contact with the outer periphery of a laminated structure of an inner layer 6 and an outer layer 7 and also has a fiber which mainly resists a force acting mainly in the tube axis direction, and a circle This was carried out for the case where a laminated structure with the outer layer 9 in which fibers that resist the force acting in the circumferential direction were arranged was additionally provided. The rod-shaped material made of continuous fiber plastic is obtained by twisting 37 carbon fiber reinforced rods into a nominal diameter of 30 mm. The tubular body to which the rod-shaped material is bonded is made of carbon fiber impregnated with epoxy resin, and has an inner diameter of 40 mm, an outer diameter of 60 mm, and a length of 400 mm. The thickness of the inner layer, in which the fibers that resist the force acting mainly in the pipe axis direction are arranged,
3 mm (inner layer 6 on the inner side), 3 mm (inner layer 8 on the outer side), and the outer layer in which fibers that mainly resist the force acting in the circumferential direction are arranged are those in the circumferential direction in which the type of carbon fiber used is changed. Elastic modulus is E = 13000 kgf / mm 2 2
mm (inner outer layer 7) and elastic modulus in the circumferential direction E = 26
2 mm (outer outer layer 9) which is 000 kgf / mm 2 . Here, the angle α of the fiber with respect to the tube axis direction is + 5 °, -5 ° (inner inner layer 6), + 5 °, -5 ° in the inner layer.
(Inner layer 8 on the outside), + 70.0 °, -70.0 ° on the outer layer
(Inner outer layer 7), + 89.7 °, −89.7 ° (outer outer layer 9). From both ends of the tubular body, the rod-shaped material 1
0 and 11 were inserted, a static crushing material was filled as an expansive filler between the tube body and the rod-shaped material, and the rod-shaped materials were joined. In this example, since the elastic modulus of the inner outer layer 6 is reduced as described above to make the stress in the circumferential direction uniform, the static crushing material (expanding material containing calcium oxide as a main component) is heat-cured. It is possible to increase the internal pressure inside the pipe. In this example, 7 hours from 24 hours after filling with the static crushing material
Heat curing was performed at 60 ° C. until 2 hours later. The internal pressure generated by the statically crushed material due to this heating and curing is 10
It became 00 kgf / cm 2 . (Incidentally, when heating and curing cannot be performed due to stress concentration without changing the elastic modulus, the internal pressure is about 500 kgf / cm 2. ) A tensile test was conducted on this example, and the yield strength was 65. It was 2 t, and the rod-shaped material was broken, but the tube was sound. In this example, a tubular body having a shorter length of 400 mm than in Example 4 was used, but the internal stress due to the statically crushed material was increased by heating and curing, and the yield strength of the tubular body could be improved without any problem in strength.
【００２０】[0020]
【発明の効果】本発明によれば、切削性、非磁性、及び
耐蝕性を損なうことなく、棒状材料を接合又は定着する
ために、棒状材料とほぼ同じ耐力、若しくはそれ以上の
耐力を発揮できる連続繊維補強プラスチック製の管体及
びその使用方法を実現できる。また、従来のテーパー部
分を有さない連続繊維補強プラスチック製の管体を開発
し、またクサビ式では接合困難な連続繊維補強プラスチ
ック製の管体を用いた棒状連続繊維補強プラスチックの
接合を実現した。According to the present invention, in order to bond or fix rod-shaped materials without impairing machinability, non-magnetism, and corrosion resistance, it is possible to exhibit a proof stress that is substantially the same as or higher than that of rod-shaped materials. A pipe body made of continuous fiber reinforced plastic and a method of using the pipe body can be realized. In addition, we have developed a conventional continuous fiber reinforced plastic tube that does not have a taper portion, and realized the joining of rod-shaped continuous fiber reinforced plastic using a continuous fiber reinforced plastic tube that is difficult to join with a wedge type. .
【図１】本発明の実施例（イ）を説明する図である。
（ロ）は、比較のための図である。FIG. 1 is a diagram illustrating an embodiment (a) of the present invention.
(B) is a diagram for comparison.
【図２】本発明の他の実施例を説明する図である。FIG. 2 is a diagram illustrating another embodiment of the present invention.
【図３】補強繊維の管軸方向に対する角度αを示す図で
ある。FIG. 3 is a diagram showing an angle α of a reinforcing fiber with respect to a tube axis direction.
【図４】棒状材料の接合を説明するために、管体を管軸
方向に切断して示す図である。FIG. 4 is a view showing a tube body cut in a tube axis direction in order to explain joining of rod-shaped materials.
【図５】積層構造の外周に積層構造を付加した場合の内
側の積層構造の内層と外層、及び外側の積層構造の内層
と外層の円周方向の応力状態を示す図である。FIG. 5 is a diagram showing circumferential stress states of an inner layer and an outer layer of an inner laminated structure and an inner layer and an outer layer of an outer laminated structure when the laminated structure is added to the outer periphery of the laminated structure.
【図６】内層と二つに細分された場合の外層の円周方向
の応力状態を示す図である。FIG. 6 is a diagram showing a stress state in a circumferential direction of an outer layer when it is subdivided into an inner layer and two.
【図７】従来の技術を示す図である。FIG. 7 is a diagram showing a conventional technique.
１ 管体 ２ 内層 ３ 外層 ４ 内層 ５ 外層 ６ 内層 ７ 外層 ８ 内層 ９ 外層 １０ 棒状材料 １１ 棒状材料 １２ 膨張性充填材 １３ 定着具 １４ 線材 １５ 膨張材 １６ スパイラル状ＣＦＲＰ １７ より線状ＣＦＲＰ １８ スパイラル状ＣＦＲＰ 1 Tubular Body 2 Inner Layer 3 Outer Layer 4 Inner Layer 5 Outer Layer 6 Inner Layer 7 Outer Layer 8 Inner Layer 9 Outer Layer 10 Rod Material 11 Rod Material 12 Expandable Filler 13 Fixing Tool 14 Wire Rod 15 Expanding Material 16 Spiral CFRP 17 Stranded CFRP 18 Spiral CFRP
Claims (7)
る繊維を配した内層と、主として円周方向に作用する力
に抵抗する繊維を配した外層との積層構造を有し、連続
繊維補強プラスチック製の棒状材料の接合又は定着に用
いる連続繊維補強プラスチック製の管体。1. A continuous fiber reinforcement having a laminated structure of an inner layer in which fibers that mainly resist the force acting in the tube axis direction are arranged and an outer layer in which fibers that mainly resist the force acting in the circumferential direction are arranged. A continuous fiber reinforced plastic tube used for joining or fixing plastic rod-shaped materials.
度αを、―４５°≦α≦４５°、外層に配した繊維の管
軸方向に対する角度αを、―４５°＞α≧―９０°又は
４５°＜α≦９０°とした請求項１記載の連続繊維補強
プラスチック製の管体。2. The angle α of the fibers arranged in the inner layer with respect to the tube axis direction is −45 ° ≦ α ≦ 45 °, and the angle α of the fibers arranged in the outer layer with respect to the tube axis direction is −45 °> α ≧ −90. The pipe body made of continuous fiber-reinforced plastic according to claim 1, wherein the angle is 45 ° or 45 ° <α ≦ 90 °.
る繊維を配した内層と、主として円周方向に作用する力
に抵抗する繊維を配した外層との積層構造の外周に接し
て、主として管軸方向に作用する力に抵抗する繊維を配
した内層と、主として円周方向に作用する力に抵抗する
繊維を配した外層との積層構造を付加して設け、それぞ
れの内層に配した繊維の管軸方向に対する角度αを、―
４５°≦α≦４５°、それぞれの外層に配した繊維の管
軸方向に対する角度αを、―４５°＞α≧―９０°又は
４５°＜α≦９０°とした連続繊維補強プラスチック製
の管体。3. An outer layer of a laminated structure mainly composed of an inner layer having fibers resistant to a force acting in the tube axis direction and an outer layer mainly having fibers resistant to a force acting in a circumferential direction is contacted with each other. Fibers arranged in each inner layer by adding a laminated structure of an inner layer in which fibers that resist the force acting in the tube axis direction and an outer layer in which fibers that mainly resist the forces acting in the circumferential direction are arranged Angle α with respect to the tube axis direction,
45 ° ≤ α ≤ 45 °, a pipe made of continuous fiber reinforced plastic in which the angle α of the fibers arranged in each outer layer with respect to the pipe axis direction is -45 °> α ≥ -90 ° or 45 ° <α ≤ 90 ° body.
れ以上の複数層に細分し、該細分された層に配された繊
維の管軸方向に対する角度αが該細分された層間で同一
又は相異なる請求項１、２又は３記載の連続繊維補強プ
ラスチック製の管体。4. The inner layer and / or the outer layer is subdivided into two or more layers, and the angle α of the fibers arranged in the subdivided layer with respect to the tube axis direction is the same between the subdivided layers or A pipe body made of continuous fiber-reinforced plastic according to claim 1, 2 or 3 which is different.
積層構造を付加して設け、該内側の積層構造における外
層の円周方向の弾性率を該外側の積層構造における外層
の円周方向の弾性率より低い値とし、前記外層間で応力
の均一化を図った請求項３記載の連続繊維補強プラスチ
ック製の管体。5. An outer laminated structure is additionally provided in contact with the outer periphery of the inner laminated structure, and the elastic modulus in the circumferential direction of the outer layer of the inner laminated structure is the circumference of the outer layer of the outer laminated structure. The tubular body made of continuous fiber reinforced plastic according to claim 3, wherein the elastic modulus is set to be lower than the elastic modulus in the direction to make the stress uniform between the outer layers.
れた層の内側の方の層の円周方向の弾性率を外側の方の
層の円周方向の弾性率より低い値とし、前記外層内で応
力の均一化を図った請求項４記載の連続繊維補強プラス
チック製の管体。6. The outer layer of the laminated structure, wherein the elastic modulus in the circumferential direction of the inner layer of the layers subdivided into a plurality of layers is set to a value lower than the elastic modulus in the circumferential direction of the outer layer, The tube body made of continuous fiber reinforced plastic according to claim 4, wherein the stress is made uniform in the tube body.
管体に挿入した棒状材料の端部間に膨張性充填材、又は
接着剤を充填し、該棒状材料を定着又は接合する請求項
１、２、３、４、５又は６記載の連続繊維補強プラスチ
ック製の管体の使用方法。7. A rod-shaped material made of continuous fiber reinforced plastic and an end portion of the rod-shaped material inserted into the pipe are filled with an expansive filler or an adhesive to fix or bond the rod-shaped material. 2. A method for using a tubular body made of continuous fiber reinforced plastic according to 2, 3, 4, 5 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16479794A JP3412918B2 (en) | 1993-06-25 | 1994-06-24 | Continuous fiber reinforced plastic tube |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17769993 | 1993-06-25 | ||
| JP5-177699 | 1993-06-25 | ||
| JP16479794A JP3412918B2 (en) | 1993-06-25 | 1994-06-24 | Continuous fiber reinforced plastic tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0771091A true JPH0771091A (en) | 1995-03-14 |
| JP3412918B2 JP3412918B2 (en) | 2003-06-03 |
Family
ID=26489765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16479794A Expired - Fee Related JP3412918B2 (en) | 1993-06-25 | 1994-06-24 | Continuous fiber reinforced plastic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3412918B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017201090A (en) * | 2016-05-02 | 2017-11-09 | 小松精練株式会社 | Seismic reinforcement |
| JP2020111989A (en) * | 2019-01-15 | 2020-07-27 | 鹿島建設株式会社 | Joining structure of concrete reinforcement member, anchorage zone structure of concrete reinforcement member and joining method for concrete reinforcement member |
-
1994
- 1994-06-24 JP JP16479794A patent/JP3412918B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017201090A (en) * | 2016-05-02 | 2017-11-09 | 小松精練株式会社 | Seismic reinforcement |
| JP2020111989A (en) * | 2019-01-15 | 2020-07-27 | 鹿島建設株式会社 | Joining structure of concrete reinforcement member, anchorage zone structure of concrete reinforcement member and joining method for concrete reinforcement member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3412918B2 (en) | 2003-06-03 |
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