JPH06296634A - Prosthetic leg - Google Patents
Prosthetic legInfo
- Publication number
- JPH06296634A JPH06296634A JP9150693A JP9150693A JPH06296634A JP H06296634 A JPH06296634 A JP H06296634A JP 9150693 A JP9150693 A JP 9150693A JP 9150693 A JP9150693 A JP 9150693A JP H06296634 A JPH06296634 A JP H06296634A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- inner sole
- composite material
- thermoplastic composite
- resin
- 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
Landscapes
- Prostheses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性複合材料を用
いた新規な義足に関するものである。更に詳しくは、義
足足部の強化用部材として用いられるインナーソールが
連続繊維で強化された熱可塑性複合材料からなる、軽量
性、対環境性、着用感、歩行性等を改善したフィット性
のよい、改良された義足に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new artificial leg using a thermoplastic composite material. More specifically, the inner sole used as a member for strengthening the artificial leg is made of a thermoplastic composite material reinforced with continuous fibers, and has a good fit property with improved lightness, environmental resistance, wearing feeling, walking property, and the like. , About the improved prosthesis.
【０００２】[0002]
【従来の技術】義足は、通常、着地面に対してほぼ垂直
に設けられた支柱の先端に接続用部材等を介して支柱と
ほぼ直交する方向に伸びたインナーソールが取付けら
れ、それらの外側を足部の形状に類似したゴム発泡体等
で覆っている。そして、義足足部のインナーソールとし
ては、軽量化、耐腐食性を考慮して、シート状のアルミ
材が用いられている。2. Description of the Related Art A prosthetic foot is usually provided with an inner sole extending in a direction substantially orthogonal to the support via a connecting member or the like at the tip of the support provided substantially perpendicular to the landing surface, and the outer side thereof. Is covered with a rubber foam similar to the shape of the foot. A sheet-shaped aluminum material is used as the inner sole of the artificial leg in consideration of weight reduction and corrosion resistance.
【０００３】[0003]
【発明が解決しようとする課題】ところで、義足の足部
におけるインナーソールに使用する上で、材料に求めら
れる特性としては、身体に対する負荷を軽減させるため
の軽量性、足を地面や床面等の着地面に下ろした時の衝
撃を吸収するための適度な弾性率、衝撃に耐える弾性限
界応力、及び、繰り返しの衝撃に耐える疲労特性があ
る。さらに、義足の足部全体の耐久性を高める上で、繰
り返し温度変化によるインナーソールの剥離を減少させ
るため、熱膨張係数の低いことも要求される。By the way, when used as an inner sole in the foot portion of a prosthesis, the properties required of the material are: lightness for reducing the load on the body, the foot on the ground, floor, etc. Has an appropriate elastic modulus for absorbing the impact when it is dropped on the ground, the elastic limit stress that withstands the impact, and the fatigue property that withstands the repeated impact. Further, in order to increase the durability of the entire foot portion of the prosthesis, a low coefficient of thermal expansion is also required to reduce peeling of the inner sole due to repeated temperature changes.
【０００４】従来使用されているアルミ材は強度及び疲
労性の点では充分であるが、弾性率の点で問題があり、
このため、足の土踏まずに似せてインナーソールを湾曲
させ、その弾性回復により急激な荷重変化の吸収効果を
持たせるようにしている。さらに、足部の肉に相当する
ものとして、ゴム発泡体で覆い衝撃を吸収している。Conventionally used aluminum materials are sufficient in strength and fatigue resistance, but have a problem in elastic modulus,
For this reason, the inner sole is curved in a manner similar to the arch of the foot, and the elastic recovery of the inner sole has an effect of absorbing a sudden load change. Further, the impact is absorbed by covering it with rubber foam, which is equivalent to the meat of the foot.
【０００５】しかしながら、このようにして作られた義
足でも必ずしも満足できるものは得られていない。ま
た、軽量性の観点からは一層の改善が求められている。
さらに、アルミ材のインナーソールは熱線膨張係数が大
きいことから、例えば冬場等において暖房の有無により
使用温度差が大きい場合に、インナーソールの剥離が生
じ、義足内に水分が入ることにより耐久性が低下すると
いう問題が生じ易い。However, even prostheses made in this way have not always been satisfactory. Further, further improvement is required from the viewpoint of lightness.
Furthermore, since the inner sole made of aluminum has a large coefficient of linear thermal expansion, for example, when there is a large difference in operating temperature due to the presence or absence of heating in the winter, the inner sole will peel off and moisture will enter the artificial leg, resulting in durability. The problem of deterioration tends to occur.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、上述の如
き従来の材料のもつ機能面での課題を解決すべく鋭意研
究を重ねた結果、インナーソールとして連続繊維強化熱
可塑性複合材料を用いることでこれらの問題を解決し得
ることを見い出し、本発明に到達した。Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the functional problems of the conventional materials as described above, and as a result, have developed a continuous fiber reinforced thermoplastic composite material as an inner sole. They have found that these problems can be solved by using them, and arrived at the present invention.
【０００７】即ち、本発明は、連続繊維を強化材として
熱可塑性樹脂をマトリックスとする熱可塑性複合材料よ
り成る強靭かつ軽量なインナーソールをそなえたことを
特徴とする新規な義足に係るものである。[0007] That is, the present invention relates to a novel prosthesis having a tough and lightweight inner sole made of a thermoplastic composite material having continuous fibers as a reinforcing material and a thermoplastic resin as a matrix. .
【０００８】本発明の義足は、それを構成するインナー
ソールとして、連続繊維を強化材とする熱可塑性複合材
料を用いたことを最大の特徴とする。The most prominent feature of the artificial foot of the present invention is that a thermoplastic composite material having continuous fibers as a reinforcing material is used as an inner sole constituting the artificial foot.
【０００９】本発明に使用する複合材料のマトリックス
樹脂としては熱可塑性樹脂が用いられる。一般に、複合
材料のマトリックスとしては熱可塑性樹脂の他に、熱硬
化性樹脂、金属、セラミックス等が知られているが、金
属は重量の点で好ましくなく、セラミックス等は耐衝撃
性の点で好ましくない。熱硬化性樹脂をマトリックスと
した複合材料は軽量性、剛性に関しては優れた材料であ
るが、耐衝撃性と耐疲労性において熱可塑性複合材料よ
り劣り、好ましくない。A thermoplastic resin is used as the matrix resin of the composite material used in the present invention. In general, as the matrix of the composite material, in addition to thermoplastic resin, thermosetting resin, metal, ceramics, etc. are known, but metal is not preferable in terms of weight, and ceramics etc. are preferable in terms of impact resistance. Absent. A composite material using a thermosetting resin as a matrix is excellent in lightness and rigidity, but is inferior to the thermoplastic composite material in impact resistance and fatigue resistance, which is not preferable.
【００１０】本発明に使用できる熱可塑性樹脂としては
特に制限はないが、剛性にとむ樹脂が好ましく、例え
ば、ナイロン６、ナイロン６６、ポリカーボネート、ポ
リエチレンテレフタレート、ポリブチレンテレフタレー
ト、ポリエチレン―２，６―ナフタレート、ポリエチレ
ン、ポリプロピレン、ポリ塩化ビニル等をあげることが
できる。これらの熱可塑性樹脂は、溶融状態にして強化
繊維間に含浸させるため、原料段階での形態に制限はな
く、取扱いが容易な形態であればいかなる形態でも使用
でき、例えば、フィルム、繊維（織編物、不織布）、粉
体、溶液、溶融物等の形態をあげることができる。The thermoplastic resin which can be used in the present invention is not particularly limited, but a resin having high rigidity is preferable, and examples thereof include nylon 6, nylon 66, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyethylene-2,6-naphthalate. , Polyethylene, polypropylene, polyvinyl chloride and the like. Since these thermoplastic resins are impregnated between the reinforcing fibers in a molten state, there is no limitation on the form at the raw material stage, and any form can be used as long as they are easy to handle. Examples thereof include knitted fabrics, non-woven fabrics), powders, solutions and melts.
【００１１】本発明に使用する強化繊維としては、マト
リックス樹脂の融点において充分な耐熱性を持ち、か
つ、剛性の高い繊維が好ましく、このような繊維として
は、例えば、炭素繊維、ガラス繊維、アラミド繊維、Ｓ
ｉＣ（炭化珪素）繊維、アルミナ繊維等があげられる
が、なかでも炭素繊維が最も好ましい。The reinforcing fiber used in the present invention is preferably a fiber having sufficient heat resistance at the melting point of the matrix resin and high rigidity. Examples of such fiber include carbon fiber, glass fiber and aramid. Fiber, S
Examples thereof include iC (silicon carbide) fiber and alumina fiber. Among them, carbon fiber is most preferable.
【００１２】強化繊維の形態としては、連続繊維の一方
向引き揃え材、織編物が使用され、この中でも異方性の
小さい織物が好ましい。織物の織組織としては、平織
り、朱子織り、綾織り等が使用される。なかでも、炭素
繊維の織物を強化材として使用した熱可塑性複合材料で
は熱線膨張係数を極めて小さい値に抑えることが可能と
なるので好ましい。As the form of the reinforcing fiber, a unidirectionally aligned material of continuous fiber or a woven or knitted material is used, and among them, a woven fabric having a small anisotropy is preferable. Plain weave, satin weave, twill weave and the like are used as the weave structure of the woven fabric. Above all, a thermoplastic composite material using a carbon fiber woven fabric as a reinforcing material is preferable because the coefficient of linear thermal expansion can be suppressed to an extremely small value.
【００１３】本発明の義足においてインナーソールを構
成する熱可塑性複合材料の繊維含有率は体積基準（Ｖ
ｆ）で３０〜６０％であることが好ましい。Ｖｆが６０
％をこえると複合材料シートを足の形状に合わせて曲げ
加工を行うのが困難になるので、好ましくない。一方Ｖ
ｆが３０％未満になると弾性限界応力が低下し、好まし
くない。In the artificial foot of the present invention, the fiber content of the thermoplastic composite material constituting the inner sole is based on the volume (V
It is preferably 30 to 60% in f). Vf is 60
If it exceeds%, it is difficult to bend the composite material sheet according to the shape of the foot, which is not preferable. On the other hand V
If f is less than 30%, the elastic limit stress decreases, which is not preferable.
【００１４】次に、本発明の義足の構成の一例を図面に
より説明する。図１において、１はインナーソール、２
はゴム発泡体等からなる義足外周部、３はインナーソー
ルを先端に取付けた支柱である。本発明の義足は、イン
ナーソール１が上述の熱可塑性複合材料からなり、好ま
しくは足の形状に合せて一部湾曲させた複合材料シート
からなるものである。なお、支柱３は軽量な金属パイプ
でも、複合材料のパイプ又はロッドでもよく、支柱３の
先端に取付具を介してインナーソール１が係止されてい
る。Next, an example of the structure of the artificial leg of the present invention will be described with reference to the drawings. In FIG. 1, 1 is an inner sole, 2
Is an outer peripheral portion of the artificial leg made of rubber foam or the like, and 3 is a column having an inner sole attached to the tip. In the artificial foot of the present invention, the inner sole 1 is made of the above-mentioned thermoplastic composite material, and is preferably made of a composite material sheet which is partially curved according to the shape of the foot. The pillar 3 may be a lightweight metal pipe or a composite material pipe or rod, and the inner sole 1 is locked to the tip of the pillar 3 via a fixture.
【００１５】[0015]
【発明の効果】本発明の如く熱可塑性複合材料のインナ
ーソールを用いた義足は、着用感、歩行性に優れている
という利点がある。該複合材料製インナーソールを用い
ることより、従来の材料であるアルミ材を用いたインナ
ーソールを備えたものよりも着用性、歩行性に優れた製
品が得られる理由は定かではないが、軽量化の他に次の
ような理由が考えられる。即ち、本発明の義足を構成す
る複合材料は、アルミ材と比べて低い弾性率と高い弾性
限界応力を持っているため、着地の際の衝撃の吸収性に
優れ、かつ、しっかりと上体を支えることが可能になる
ためと推定される。EFFECTS OF THE INVENTION Prosthetic legs using an inner sole of a thermoplastic composite material as in the present invention have an advantage that they are excellent in wearing feeling and walking ability. It is not clear why the use of the composite inner sole makes it possible to obtain a product that is superior in wearability and walkability to a product having an inner sole made of an aluminum material, which is a conventional material. In addition to the above, the following reasons can be considered. That is, since the composite material constituting the artificial leg of the present invention has a lower elastic modulus and a higher elastic limit stress as compared with the aluminum material, it is excellent in absorbing shock at the time of landing, and firmly holds the upper body. It is estimated that it will be possible to support.
【００１６】かくして、本発明に従えば軽量且つ着用
感、歩行性に優れた義足が提供される。[0016] Thus, according to the present invention, a prosthetic leg that is lightweight and has excellent wearing feeling and walking ability is provided.
【００１７】[0017]
【実施例】次に、本発明の実施例を詳述するが、本発明
はこれらの実施例により限定されるものではない。な
お、これらの実施例において「ＣＦクロス」は、東レ
（株）製の炭素繊維平織りクロス（ＣＯ６３４１Ｂ、目
付３９６ｇ／ｍ2 ）を示し、「ＧＦクロス」は、旭ファ
イバーグラス（株）製のガラス繊維平織りクロス（Ｈ２
０１，目付け２０４ｇ／ｍ2 ）を意味する。EXAMPLES Next, examples of the present invention will be described in detail, but the present invention is not limited to these examples. In these examples, “CF cloth” means carbon fiber plain weave cloth (CO6341B, basis weight 396 g / m 2 ) manufactured by Toray Industries, Inc., and “GF cloth” is glass manufactured by Asahi Fiber Glass Co., Ltd. Fiber plain weave cloth (H2
01, a basis weight of 204 g / m 2 ).
【００１８】[0018]
【実施例１】本例は、連続繊維強化熱可塑性複合材料を
用いた義足材料（インナーソール）の成形例である。Example 1 This example is a molding example of a prosthetic material (inner sole) using a continuous fiber reinforced thermoplastic composite material.
【００１９】強化材として上記のＣＦクロスと、マトリ
ックス樹脂としてＰＣ（ポリカーボネート樹脂）フィル
ムとを用い、上記ＣＦクロスを７層、ＰＣフィルムを８
層交互に積層し、平板金型の内部にセットし、熱圧プレ
スを用いて、温度２９０℃、圧力３０ｋｇ／ｃｍ2 の条
件下にて３０分間加熱加圧してＣＦクロス中に樹脂を含
浸した後、８０℃迄冷却し金型より取り出した。得られ
た成形板の厚みは３ｍｍで、Ｖｆは５２％であり、非常
に良好な樹脂含浸板であった。The above CF cloth is used as a reinforcing material, and a PC (polycarbonate resin) film is used as a matrix resin. The CF cloth has 7 layers and the PC film has 8 layers.
The layers are alternately laminated, set inside a flat plate mold, and heated and pressed for 30 minutes under the conditions of a temperature of 290 ° C. and a pressure of 30 kg / cm 2 using a hot press to impregnate the CF cloth with the resin. After that, it was cooled to 80 ° C. and taken out from the mold. The obtained molded plate had a thickness of 3 mm and a Vf of 52%, which was a very good resin-impregnated plate.
【００２０】次に、この成形板を用いて義足用インナー
ソールの成形を行った。すなわち、インナーソールを想
定した寸法（５０×１７０ｍｍ）に裁断した樹脂含浸板
を一対の金型で挟み込み、２２０℃に加熱し、図１に示
すような湾曲した板状に加圧成形した。Next, an inner sole for a prosthesis was molded using this molding plate. That is, a resin-impregnated plate cut into a size (50 × 170 mm) assuming an inner sole was sandwiched by a pair of molds, heated to 220 ° C., and pressure-molded into a curved plate shape as shown in FIG.
【００２１】得られた義足用インナーソールの重量は３
８ｇであって市販アルミ材インナーソールの重量の約３
５％で極めて軽量なものであった。また、該インナーソ
ールの弾性限界荷重は１８０ｋｇでアルミ材の９５ｋｇ
より大きく、曲げ弾性率は５２３０ｋｇ／ｍｍ2 でアル
ミ材の約７０％で、破壊しにくく、かつ多少のしなやか
さも有していた。The weight of the obtained prosthetic inner sole is 3
8g, about 3 times the weight of the commercial aluminum innersole
It was 5% and extremely lightweight. In addition, the elastic limit load of the inner sole is 180 kg and that of aluminum material is 95 kg.
It was larger, had a flexural modulus of 5230 kg / mm 2 , was about 70% of that of the aluminum material, was not easily broken, and had some flexibility.
【００２２】このインナーソールを用い、図１の如くア
ルミパイプ製の支柱とゴム発泡体からなる被覆部と組合
せて、着用性、歩行性の良好な義足が得られた。By using this inner sole and combining it with an aluminum pipe support and a cover made of a rubber foam as shown in FIG. 1, a prosthesis with good wearability and walkability was obtained.
【００２３】[0023]
【実施例２】実施例１と同様の目的で、連続強化繊維を
ＧＦクロスに置き換えて、その他の条件は実施例１と同
一の条件で成形した。得られた樹脂含浸板はＶｆが４８
％で上記実施例１と同様に含浸性の良いものが得られ
た。この樹脂含浸板を用いて、実施例１と同様の成形方
法で義足用インナーソールを成型した。Example 2 For the same purpose as in Example 1, the continuous reinforcing fibers were replaced with GF cloth, and the other conditions were the same as those of Example 1. The obtained resin-impregnated plate has a Vf of 48.
%, A good impregnating property was obtained as in Example 1. Using this resin-impregnated plate, an inner sole for a prosthesis was molded by the same molding method as in Example 1.
【００２４】得られたインナーソールの重量は４８ｇで
アルミ材インナーソールの４４％であった。また、その
弾性限界荷重は１６０ｋｇ、ヤング率は１９００ｋｇ／
ｍｍ 2 であり、実施例１と同様に、破壊しにくく、しな
やかさを持つものであった。The weight of the obtained inner sole is 48 g.
It was 44% of the aluminum material inner sole. Also, that
Elastic limit load is 160kg, Young's modulus is 1900kg /
mm 2And, like Example 1, is hard to break and
It had a gentleness.
【００２５】[0025]
【実施例３】実施例１と同様の目的で、連続強化繊維と
してＣＦクロスを用い、マトリックス樹脂をＰＣフィル
ムからナイロン６フィルムに置き換えて、含浸温度を２
７０℃とし、その他の条件は実施例１と同一条件で成形
した。得られた樹脂含浸板は非常に含浸性の良好なもの
であった。この樹脂含浸板を用いて実施例１と同様にイ
ンナーソールとしての曲げ加工を実施した。Example 3 For the same purpose as in Example 1, CF cloth was used as the continuous reinforcing fiber, the matrix resin was replaced with a nylon 6 film, and the impregnation temperature was changed to 2.
Molding was performed under the same conditions as in Example 1 except that the temperature was 70 ° C. The obtained resin-impregnated plate had a very good impregnation property. Using this resin-impregnated plate, bending was performed as an inner sole in the same manner as in Example 1.
【００２６】得られたインナーソールの重量は３７ｇで
アルミ材インナーソールの約３４％であった。また、該
インナーソールは弾性限界荷重２１０ｋｇ、ヤング率５
１８０ｋｇ／ｍｍ2 であり、実施例１と同様の効果が得
られた。The weight of the obtained inner sole was 37 g, which was about 34% of the weight of the aluminum inner sole. The inner sole has an elastic limit load of 210 kg and a Young's modulus of 5
It was 180 kg / mm 2 , and the same effect as in Example 1 was obtained.
【図１】本発明に係る義足の構造の一例を示す模式図で
ある。FIG. 1 is a schematic view showing an example of the structure of a prosthesis according to the present invention.
１ インナーソール ２ ゴム発泡体 ３ 支柱 1 Inner sole 2 Rubber foam 3 Support
Claims (4)
マトリックスとする熱可塑性複合材料よりなる強靭かつ
軽量なインナーソールを備えたことを特徴とする義足。1. A prosthesis comprising a tough and lightweight inner sole made of a thermoplastic composite material having continuous fibers as reinforcing fibers and a thermoplastic resin as a matrix.
材料のＶｆ（体積基準繊維含有率）が、３０〜６０％で
ある請求項１に記載の義足。2. The artificial leg according to claim 1, wherein the thermoplastic composite material forming the inner sole has a Vf (volume-based fiber content) of 30 to 60%.
維、ガラス繊維、アラミド繊維、あるいはＳｉＣ繊維、
アルミナ繊維等の無機繊維より選ばれた少なくとも一種
からなる連続繊維の織物である請求項１または２に記載
の義足。3. The reinforcing fiber of the thermoplastic composite material is carbon fiber, glass fiber, aramid fiber, or SiC fiber,
The artificial leg according to claim 1 or 2, which is a woven fabric of continuous fibers made of at least one kind selected from inorganic fibers such as alumina fibers.
が、ナイロン、ポリカーボネート、ポリエステル、ポリ
オレフィン、ポリ塩化ビニルより選ばれた少なくとも１
種の熱可塑性樹脂である請求項１，２または３に記載の
義足。4. The matrix resin of the thermoplastic composite material is at least one selected from nylon, polycarbonate, polyester, polyolefin and polyvinyl chloride.
The artificial leg according to claim 1, which is a thermoplastic resin of a type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5091506A JP3009560B2 (en) | 1993-04-19 | 1993-04-19 | Right foot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5091506A JP3009560B2 (en) | 1993-04-19 | 1993-04-19 | Right foot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06296634A true JPH06296634A (en) | 1994-10-25 |
| JP3009560B2 JP3009560B2 (en) | 2000-02-14 |
Family
ID=14028302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5091506A Expired - Fee Related JP3009560B2 (en) | 1993-04-19 | 1993-04-19 | Right foot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009560B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868073A (en) * | 1987-05-19 | 1989-09-19 | Yanmar Diesel Engine Co., Ltd. | Highly active catalyst and highly active electrode made of this catalyst |
| JP2018154064A (en) * | 2017-03-21 | 2018-10-04 | 三菱ケミカル株式会社 | Molding method of composite material and molded article |
| JP2019059808A (en) * | 2017-09-25 | 2019-04-18 | 中部エンジニアリング株式会社 | Fiber reinforced resin tubular body |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973161B (en) * | 2018-06-22 | 2021-04-30 | 朱波 | Thermoplastic prepreg cloth for carbon fiber composite material artificial limb and preparation method of artificial limb component |
-
1993
- 1993-04-19 JP JP5091506A patent/JP3009560B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868073A (en) * | 1987-05-19 | 1989-09-19 | Yanmar Diesel Engine Co., Ltd. | Highly active catalyst and highly active electrode made of this catalyst |
| JP2018154064A (en) * | 2017-03-21 | 2018-10-04 | 三菱ケミカル株式会社 | Molding method of composite material and molded article |
| JP2019059808A (en) * | 2017-09-25 | 2019-04-18 | 中部エンジニアリング株式会社 | Fiber reinforced resin tubular body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3009560B2 (en) | 2000-02-14 |
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