JPH0367746A - Frp member - Google Patents
Frp memberInfo
- Publication number
- JPH0367746A JPH0367746A JP20275289A JP20275289A JPH0367746A JP H0367746 A JPH0367746 A JP H0367746A JP 20275289 A JP20275289 A JP 20275289A JP 20275289 A JP20275289 A JP 20275289A JP H0367746 A JPH0367746 A JP H0367746A
- Authority
- JP
- Japan
- Prior art keywords
- frp member
- frp
- twice
- width
- plate thickness
- 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
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000006096 absorbing agent Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WNEODWDFDXWOLU-QHCPKHFHSA-N 3-[3-(hydroxymethyl)-4-[1-methyl-5-[[5-[(2s)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl]amino]-6-oxopyridin-3-yl]pyridin-2-yl]-7,7-dimethyl-1,2,6,8-tetrahydrocyclopenta[3,4]pyrrolo[3,5-b]pyrazin-4-one Chemical compound C([C@@H](N(CC1)C=2C=NC(NC=3C(N(C)C=C(C=3)C=3C(=C(N4C(C5=CC=6CC(C)(C)CC=6N5CC4)=O)N=CC=3)CO)=O)=CC=2)C)N1C1COC1 WNEODWDFDXWOLU-QHCPKHFHSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Springs (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、自動車のバンパ等における衝撃吸収用として
好適なＦＲＰ部材に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an FRP member suitable for shock absorption in automobile bumpers and the like.
［従来の技術］
周知のＦＲＰ板ばねは、マトリックス樹脂と、主に板ば
ねの長手方向に沿う一方向強化繊維とによって成形され
ており、必要に応じて弓状の反り（キャンバ）がつけら
れている。従来のＦＲＰ板ばねは、荷重が負荷された時
に板厚方向に撓むことにより、荷重を弾性的に支えるよ
うになっている。従って過大な負荷がかかった時に、曲
げ方向の撓みが限界値を越えるあたりから１ａ維の一部
が切れたり、繊維がささくれ立つなどしてついには破壊
に至る。[Prior Art] A well-known FRP leaf spring is molded from a matrix resin and unidirectional reinforcing fibers mainly along the longitudinal direction of the leaf spring, and is curved in a bow shape (camber) as necessary. ing. Conventional FRP leaf springs are designed to elastically support the load by bending in the thickness direction when a load is applied. Therefore, when an excessive load is applied, some of the 1a fibers break or the fibers stand up at the point where the deflection in the bending direction exceeds the limit value, eventually leading to destruction.
懸架用ＦＲＰ板ばねの曲率半径は、車両の種類にもよる
が一例として８００ｍｍ以上ある。また、懸架用ＦＲＰ
板ばねのばね定数は一例として２５ｋｇ ｆ／■程度で
ある。これに対し、懸架ばね以外の用途に使われるＦＲ
Ｐ部材のなかには曲率半径がＨＯｔａ以下のものもある
。例えば第７図に示されているバンパ用衝撃吸収体とし
てのＵ状のＦＲＰ部材ａは、湾曲部Ｃの曲率半径Ｒが１
００■以下と小さく、しかも小さなストロークで大きな
エネルギーを吸収しなければムらないから、ばね定数が
例えば１３０ ｋｇ ｆ ／ ａｓときわめて大きい。The radius of curvature of the suspension FRP leaf spring is, for example, 800 mm or more, depending on the type of vehicle. In addition, FRP for suspension
The spring constant of the leaf spring is, for example, about 25 kg f/■. In contrast, FRs used for purposes other than suspension springs
Some P members have a radius of curvature of HOta or less. For example, in a U-shaped FRP member a as a bumper shock absorber shown in FIG. 7, the radius of curvature R of the curved portion C is 1.
The spring constant is extremely large, for example 130 kg f/as, because it is small, less than 00 ■, and must absorb a large amount of energy with a small stroke.
この種のＦＲＰ部材部材−、図示矢印Ｐ方向すなわち曲
率半径Ｒが減少する方向の荷重が負荷される。This type of FRP member is loaded with a load in the direction of the arrow P shown in the figure, that is, in the direction in which the radius of curvature R decreases.
［発明が解決しようとする課題］
上記ＦＲＰ部材部材−うに、曲率半径Ｒが小さくかっば
ね定数が大きく、しかも曲率半径Ｒが減少する方向に荷
重が負荷されるものにおいて、許容値以上の荷重を負荷
した場合、従来の車両懸架用ＦＲＰ板ばねでは曲げ荷重
により強化ｔａ維が切れて破壊していたが、曲率半径Ｒ
が小さくかっばね定数が大きい時には、従来のＦＲＰ板
ばねとは違った破壊状況を呈することが本発明者らの研
究によって判明した。すなわち、この種のＦＲＰ部材部
材−げによって強化繊維が切れて破壊するのではなく、
まず長手方向の強化繊維に沿って縦割れを生じ、更に荷
重を負荷すると層閲せん断破壊を生じるようになる。そ
の原因は、もともと曲率半径Ｒの小さい湾曲部Ｃを更に
曲率半径を小さくするように無理に曲げるため、第８図
に２点鎖線で示したように板幅方向各部で曲り方が異な
り、しかも荷重Ｐによる過大なせん断応力が発生するこ
とにより、縦割れが発生すると考えられる。[Problems to be Solved by the Invention] In the above-mentioned FRP member, the radius of curvature R is small and the spring constant is large, and the load is applied in the direction in which the radius of curvature R decreases. When loaded, in conventional FRP leaf springs for vehicle suspension, the reinforced TA fibers were cut and destroyed due to the bending load, but the radius of curvature R
The inventors' research has revealed that when the spring constant is small and the spring constant is large, the fracture situation is different from that of conventional FRP leaf springs. In other words, instead of the reinforcing fibers being cut and destroyed by this type of FRP member cracking,
First, vertical cracks occur along the reinforcing fibers in the longitudinal direction, and when a load is further applied, shear failure occurs. The reason for this is that the curved portion C, which originally had a small radius of curvature R, is forcibly bent to further reduce the radius of curvature, and as shown by the two-dot chain line in Fig. 8, each portion in the width direction of the plate is bent differently. It is thought that vertical cracking occurs due to the excessive shear stress generated by the load P.
ＦＲＰ部材部材−面に縦割れが生じると、割れの界面で
耐水性や耐候性等が悪化し、−気に破壊が進行する原因
になる。そしてこのような縦割れは、板幅すが板厚ｔの
２倍以上ある時に顕著に現れることが本発明者らの研究
によってわかっている。When vertical cracks occur on the surface of an FRP member, water resistance, weather resistance, etc. deteriorate at the interface of the cracks, which causes the destruction to progress rapidly. It has been found through research by the present inventors that such vertical cracks appear conspicuously when the plate width is more than twice the plate thickness t.
ＦＲＰ部材部材−割れを生じにくくするには、ＦＲＰ部
材部材−面積を大きくすることによってせん断応力を下
げればよい。しかしながら、単にＦＲＰ部材部材−面積
を大きくしてしまうとばね定数が増加し、ＦＲＰ部材部
材−求されている設計仕様に合わなくなってしまう。ま
た、湾曲部Ｃのテンション面などにクロス等の補強繊維
層を埋設することも縦割れを防ぐ上で有効であるが、こ
のような補強層をＦＲＰ部材部材一体に成形するには手
間がかかりコスト高を招く原因になる。In order to make the FRP member less prone to cracking, the shear stress can be lowered by increasing the area of the FRP member. However, if the area of the FRP member is simply increased, the spring constant will increase, and the FRP member will no longer meet the required design specifications. Additionally, embedding a reinforcing fiber layer such as cloth in the tension surface of the curved portion C is also effective in preventing vertical cracking, but it takes time and effort to mold such a reinforcing layer into the FRP member. This causes high costs.
従って本発明の目的は、ばね定数に実質的な影響を及ぼ
すことなく縦割れを防止でき、しかも製造工程が複雑化
せずにすむようなＦＲＰ部材を提供することにある。Therefore, an object of the present invention is to provide an FRP member that can prevent vertical cracking without substantially affecting the spring constant, and that does not require complicating the manufacturing process.
［課題を解決するための手段］
上記目的を果たすために開発された本発明のＦＲＰ部材
は、マトリックス樹脂と長手方向に沿う強化繊維とによ
って略Ｕ状ないしＪ状に湾曲した形状に成形されかつ曲
率半径が減少する方向に荷重が負荷される使われ方をす
るものであって、全体の板幅すが板厚ｔの２倍以上あり
、しかも少なくとも湾曲部において幅方向に２以上の要
素に分割されており、分割された各要素の板幅ｂ′を板
厚ｔの２倍以下にしたものである。[Means for Solving the Problems] The FRP member of the present invention developed to achieve the above object is formed into a substantially U-shaped or J-shaped curved shape using a matrix resin and reinforcing fibers along the longitudinal direction. The load is applied in the direction that the radius of curvature decreases, the overall plate width is more than twice the plate thickness t, and at least in the curved part there are two or more elements in the width direction. The plate width b' of each divided element is set to be less than twice the plate thickness t.
［作用〕
本発明のＦＲＰ部材は従来の懸架用ばねに比べて曲率半
径が著しく小さく、しかも曲率半径が更に成型する方向
に荷重が負荷される。本発明のＦＲＰ部材は少なくとも
湾曲部において幅方向に２つ以上の要素に分割したこと
によって、各要素の板幅が板厚の２倍以下におさえられ
ているから、Ｕ状ないしＪ状に成形されている曲率半径
が小さくかっばね定数の大きなＦＲＰ部材が上記方向に
撓まされても縦割れが発生しない。従って断面積（特に
板厚）やぼね定数等の設計値を変更せずに耐久性の向上
が図れる。[Operation] The FRP member of the present invention has a significantly smaller radius of curvature than conventional suspension springs, and a load is applied in a direction that further shapes the radius of curvature. The FRP member of the present invention is divided into two or more elements in the width direction at least at the curved portion, so that the width of each element is suppressed to less than twice the thickness of the plate, so it is formed into a U-shape or J-shape. Even if an FRP member having a small radius of curvature and a large spring constant is bent in the above direction, no vertical cracks will occur. Therefore, durability can be improved without changing design values such as cross-sectional area (particularly plate thickness) and bone constant.
［実施例］
以下に本発明の第１実施例について第１図ないし第４図
を参照して説明する。第４図に例示されたバンバシステ
ム１に、左右一対のＦＲＰ部材２゜２が用いられている
。バンパシステム１は、車体のサイドメンバ３の端部に
固定された上記ＦＲＰ部材２．２と、これらＦＲＰ部材
２．２の前面側に配置されたアマ−チャー５と、このア
マ−チャー５を覆うフェイシャ６などを備えて構成され
ている。７はタイヤである。各ＦＲＰ部材２の一端（固
定端）はボルト等の連結用部品１０によってサイドメン
バ３に固定され、ＦＲＰ部材２の他端（自由端）は接続
用部材１１を介してアマ−チャー５に接している。[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. A pair of left and right FRP members 2°2 are used in the bumper system 1 illustrated in FIG. 4. The bumper system 1 includes the FRP member 2.2 fixed to the end of the side member 3 of the vehicle body, an armature 5 disposed on the front side of the FRP member 2.2, and the armature 5. It is configured to include a covering fascia 6 and the like. 7 is a tire. One end (fixed end) of each FRP member 2 is fixed to the side member 3 by a connecting member 10 such as a bolt, and the other end (free end) of each FRP member 2 is in contact with the armature 5 via a connecting member 11. ing.
ＦＲＰ部材２の一例を第１図ないし第３図に示す。この
ＦＲＰ部材２は、側面方向から見た形状がＵないしＪ状
をなしており、図示例の場合には全体の板幅すが板厚ｔ
の３．８倍程度ある。このＦＲＰ部材２は、幅方向に２
分割された左右一対の要素２ａ、２ｂを互いに近接させ
て並べたものである。各要素２ａ、２ｂの個々の板幅ｂ
′は互いに等しく、しかも各々の板幅ｂ′は板厚ｔの２
倍以下としである。−例として、本実施例のＦＲＰ部材
２の全体の板幅すは６５Ｉ−５各要素の板幅ｂ′は３２
．５ａｍ、板厚ｔ−１７−−、曲率半径Ｒ−６０問、一
端側の平坦部の長さＬ １−３０ａｍ、他端例の平坦部
の長さＬ２−１２０−層である。An example of the FRP member 2 is shown in FIGS. 1 to 3. This FRP member 2 has a U- or J-shape when viewed from the side, and in the case of the illustrated example, the overall board width is t and the board thickness is t.
It is about 3.8 times that of the previous year. This FRP member 2 has two parts in the width direction.
A pair of divided left and right elements 2a and 2b are arranged close to each other. Individual plate width b of each element 2a, 2b
' are equal to each other, and each plate width b' is equal to 2 of the plate thickness t.
It is less than twice that. - As an example, the overall board width of the FRP member 2 of this embodiment is 65I-5, and the board width b' of each element is 32
．． 5 am, plate thickness t-17--, radius of curvature R-60, length of the flat part at one end L1-30 am, and length L2-120 of the flat part at the other end.
上述した一対の要素２ａ、 ２ｂからなるＦＲＰ部材
２は、ＦＲＰ部材２の長手方向に沿う一方向強化繊維１
７（一部のみ図示）と、周知のマトリックス樹脂１８と
により、略Ｕ状ないしＪ状に成形されている。一方向強
化繊維１７にはガラス繊維が用いられるが、場合によっ
ては炭素繊維や有機繊維が使用されてもよい。各要素２
ａ、２ｂの一端側に、上記連結用部品１０を挿通させる
ための孔（図示せず）等が形成される場合もある。The FRP member 2 consisting of the pair of elements 2a and 2b described above has unidirectional reinforcing fibers 1 along the longitudinal direction of the FRP member 2.
7 (only a portion of which is shown) and a well-known matrix resin 18 are formed into a substantially U-shape or J-shape. Although glass fiber is used as the unidirectional reinforcing fiber 17, carbon fiber or organic fiber may be used depending on the case. Each element 2
A hole (not shown) or the like may be formed at one end of each of a and 2b, through which the connecting component 10 is inserted.
ＦＲＰ部材２全体に占めるガラス繊維の量は一例として
体積で約５５％１重量で約７２〜７３％である。The amount of glass fibers in the entire FRP member 2 is, for example, about 55% by volume and about 72 to 73% by weight.
バンパシステム１における衝撃吸収体として用いられる
上記ＦＲＰ部材２は、曲率半径Ｒが減少する方向から荷
重Ｐを受けるようにして使われる。The FRP member 2 used as a shock absorber in the bumper system 1 is used so as to receive a load P from a direction in which the radius of curvature R decreases.
荷重Ｐが負荷された場合、ＦＲＰ部材２が撓むことによ
りマトリックス樹脂１８と一方向強化繊維１７とが協働
してエネルギーを蓄える。When a load P is applied, the FRP member 2 bends, and the matrix resin 18 and the unidirectional reinforcing fibers 17 cooperate to store energy.
車体前部等の限られたスペースで所定の衝撃吸収性能を
発揮するには、バンバ用ＦＲＰ部材２のばね定数は懸架
用ばねに比べて数倍ないし数十倍に設定されている必要
がある。例えば、２個のＦＲＰ部材２，２で車重１３０
０ｋｇ、車速８ ｋ＋ｇ／時のエネルギー３２８ｋｇｍ
を５０−■のストロークで吸収させるのに必要な１個の
ＦＲＰ部材２のばね定数には １３０ｋｇｆ／■１であ
る。In order to exhibit the specified shock absorption performance in a limited space such as the front of the vehicle, the spring constant of the bumper FRP member 2 needs to be set several to several tens of times higher than that of the suspension spring. . For example, two FRP members 2, 2 have a vehicle weight of 130
0kg, vehicle speed 8k+g/hour energy 328kgm
The spring constant of one FRP member 2 required to absorb the force with a stroke of 50-■ is 130 kgf/■1.
本実施例のＦＲＰ部材２は幅方向に互いに等しい幅で２
つの要素２ａ、２ｂに２分割され、各要素２ａ、２ｂの
板幅ｂ′を板厚ｔの２倍以下にしているため、ＦＲＰ部
材２全体の板幅すと板厚ｔが従来品と同等でありながら
も、各要素２ａ。The FRP member 2 of this embodiment has two parts having equal widths in the width direction.
It is divided into two elements 2a and 2b, and the width b' of each element 2a and 2b is less than twice the thickness t, so the width and thickness t of the entire FRP member 2 are the same as the conventional product. However, each element 2a.
２ｂにおける縦割れの発生を防止できる。すなわち本実
施例のＦＲＰ部材２の各部寸法とばね定数は従来品を同
等にしても設計仕様通りの特性を満足できる。The occurrence of vertical cracks in 2b can be prevented. In other words, even if the dimensions and spring constant of each part of the FRP member 2 of this embodiment are the same as those of the conventional product, the characteristics as per the design specifications can be satisfied.
第５図に本発明の第２実施例を示している。この実施例
は、湾曲部２ｃにおいて幅方向中央部に長手方向に沿う
スリット２１を設けることによって、湾曲部２ｃを幅方
向に２つの要素２ａ、２ｂに分割している。このような
構成も荷重負荷時の縦割れの発生を防止する上で有効で
ある。なお、スリット２１は板厚方向の途中までに形成
されていてもよい。また、スリット２１にエラストマ等
のゴム状弾性体を充填させてもよい。FIG. 5 shows a second embodiment of the invention. In this embodiment, the curved portion 2c is divided into two elements 2a and 2b in the width direction by providing a slit 21 along the longitudinal direction in the center portion of the curved portion 2c in the width direction. Such a configuration is also effective in preventing the occurrence of vertical cracks during load application. Note that the slit 21 may be formed halfway in the plate thickness direction. Further, the slit 21 may be filled with a rubber-like elastic body such as an elastomer.
次表１は、前記第１実施例と第２実施例に破壊荷重を負
荷した時の破壊のモードを従来品と比較した結果である
。Table 1 below shows the results of a comparison between the failure mode when a failure load is applied to the first and second examples and the conventional product.
表１
〔発明の効果〕
本発明によれば、Ｕ状ないしＪ状に湾曲した形状に成形
されている曲率半径の小さいＦＲＰ部材が曲率半径を減
少させる方向に撓まされた時に、縦割れが生じることを
防止でき、割れの界面での耐水性や耐候性等の悪化を防
止でき、しかも断面積やぼね定数等の主要諸元を変更す
ることな〈従来品と同等のばね特性を満足させることが
できる。Table 1 [Effects of the Invention] According to the present invention, when an FRP member having a small radius of curvature formed into a U-shaped or J-shaped curve is bent in a direction that reduces the radius of curvature, vertical cracks can be prevented. It is possible to prevent deterioration of water resistance and weather resistance at the interface of cracks, and without changing the main specifications such as cross-sectional area and spring constant (satisfying spring characteristics equivalent to conventional products). can be done.
また、表面層にクロス等の補強繊維層を付加させずに縦
割れを防止できるから、製造工程が複雑化することもな
い。Further, since vertical cracking can be prevented without adding a reinforcing fiber layer such as cloth to the surface layer, the manufacturing process does not become complicated.
第１図は本発明の第１実施例を示すＦＲＰ部材の斜視図
、第２図は第１図に示されたＦＲＰ部材の側面図、第３
図は第１図に示されたＦＲＰ部材の正面図、第４図は第
１図に示されたＦＲＰ部材を用いたバンパシステムの平
面図、第５図は本発明の第２実施例を示すＦＲＰ部材の
斜視図、第６図は第５図に示されたＦＲＰ部材の正面図
、第７図は従来のＦＲＰ部材を示す斜視図、第８図は従
来のＦＲＰ部材の背面図である。
１・・・バンバシステム、２・・・ＦＲＰ部材、２ａ。
２ｂ・・・要素、１７・・・一方向強化繊維、１８・・
・マトリックス樹脂、２１・・・スリット。Fig. 1 is a perspective view of an FRP member showing a first embodiment of the present invention, Fig. 2 is a side view of the FRP member shown in Fig. 1, and Fig. 3 is a side view of the FRP member shown in Fig. 1.
The figure shows a front view of the FRP member shown in Fig. 1, Fig. 4 is a plan view of a bumper system using the FRP member shown in Fig. 1, and Fig. 5 shows a second embodiment of the present invention. FIG. 6 is a front view of the FRP member shown in FIG. 5, FIG. 7 is a perspective view of a conventional FRP member, and FIG. 8 is a rear view of the conventional FRP member. 1... Bamba system, 2... FRP member, 2a. 2b... Element, 17... Unidirectional reinforcing fiber, 18...
- Matrix resin, 21... slit.
Claims (2)
よって略Ｕ状ないしＪ状に湾曲した形状に成形されかつ
曲率半径が減少する方向に荷重が負荷される使われ方を
するＦＲＰ部材であって、全体の板幅ｂが板厚ｔの２倍
以上あり、しかも少なくとも湾曲部において幅方向に２
以上の要素に分割されており、分割された各要素の板幅
ｂ′を板厚ｔの２倍以下としたことを特徴とするＦＲＰ
部材。(1) An FRP member that is formed into a substantially U- or J-curved shape by matrix resin and reinforcing fibers along the longitudinal direction, and is used in such a way that a load is applied in a direction that reduces the radius of curvature. , the overall plate width b is at least twice the plate thickness t, and at least 2 times the width in the curved part.
FRP is divided into the above elements, and the plate width b' of each divided element is equal to or less than twice the plate thickness t.
Element.
向に沿うスリットを設けることによって、幅方向に２以
上の要素に分割した請求項１記載のＦＲＰ部材。(2) The FRP member according to claim 1, wherein the FRP member is divided into two or more elements in the width direction by providing a slit along the longitudinal direction at least in the center portion in the width direction in the curved portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20275289A JP2726710B2 (en) | 1989-08-07 | 1989-08-07 | FRP member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20275289A JP2726710B2 (en) | 1989-08-07 | 1989-08-07 | FRP member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0367746A true JPH0367746A (en) | 1991-03-22 |
| JP2726710B2 JP2726710B2 (en) | 1998-03-11 |
Family
ID=16462579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20275289A Expired - Lifetime JP2726710B2 (en) | 1989-08-07 | 1989-08-07 | FRP member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2726710B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2000095C2 (en) * | 2006-06-09 | 2007-12-11 | Loggers Rubbertech | Spring unit with leaf spring for e.g. use in clean rooms, uses spring made from fiber reinforced plastic |
| WO2013128784A1 (en) * | 2012-02-29 | 2013-09-06 | 川崎重工業株式会社 | Plate spring unit and railroad vehicle carriage using same |
| JP2017506597A (en) * | 2014-02-12 | 2017-03-09 | ムール ウント ベンダー コマンディートゲゼルシャフトＭｕｈｒ ｕｎｄ Ｂｅｎｄｅｒ ＫＧ | Leaf spring device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11780079B2 (en) * | 2022-03-10 | 2023-10-10 | John Christian Colley | Flexible structure, particularly for applications in robotics and orthopedics |
-
1989
- 1989-08-07 JP JP20275289A patent/JP2726710B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2000095C2 (en) * | 2006-06-09 | 2007-12-11 | Loggers Rubbertech | Spring unit with leaf spring for e.g. use in clean rooms, uses spring made from fiber reinforced plastic |
| WO2013128784A1 (en) * | 2012-02-29 | 2013-09-06 | 川崎重工業株式会社 | Plate spring unit and railroad vehicle carriage using same |
| CN103687776A (en) * | 2012-02-29 | 2014-03-26 | 川崎重工业株式会社 | Leaf spring unit and bogie for railway vehicle using same |
| CN103687776B (en) * | 2012-02-29 | 2016-08-17 | 川崎重工业株式会社 | Leaf spring unit and bogie for railway vehicle using same |
| US9493174B2 (en) | 2012-02-29 | 2016-11-15 | Kawasaki Jukogyo Kabushiki Kaisha | Plate spring unit and railcar bogie using same |
| JP2017506597A (en) * | 2014-02-12 | 2017-03-09 | ムール ウント ベンダー コマンディートゲゼルシャフトＭｕｈｒ ｕｎｄ Ｂｅｎｄｅｒ ＫＧ | Leaf spring device |
| US10059163B2 (en) | 2014-02-12 | 2018-08-28 | Muhr Und Bender Kg | Leaf spring and leaf spring assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2726710B2 (en) | 1998-03-11 |
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