JP6440847B2 - 弾性部材用線材および弾性部材 - Google Patents
弾性部材用線材および弾性部材 Download PDFInfo
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- JP6440847B2 JP6440847B2 JP2017536497A JP2017536497A JP6440847B2 JP 6440847 B2 JP6440847 B2 JP 6440847B2 JP 2017536497 A JP2017536497 A JP 2017536497A JP 2017536497 A JP2017536497 A JP 2017536497A JP 6440847 B2 JP6440847 B2 JP 6440847B2
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- 239000011162 core material Substances 0.000 claims description 91
- 239000000835 fiber Substances 0.000 claims description 39
- 238000004804 winding Methods 0.000 claims description 32
- 239000000725 suspension Substances 0.000 claims description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims description 11
- 238000005536 corrosion prevention Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 239000012783 reinforcing fiber Substances 0.000 description 37
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 32
- 239000011151 fibre-reinforced plastic Substances 0.000 description 32
- 229920005989 resin Polymers 0.000 description 20
- 239000011347 resin Substances 0.000 description 20
- 229910052782 aluminium Inorganic materials 0.000 description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 14
- 229920001187 thermosetting polymer Polymers 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- -1 polypropylene Polymers 0.000 description 10
- 239000004743 Polypropylene Substances 0.000 description 9
- 229920001155 polypropylene Polymers 0.000 description 9
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- 239000011152 fibreglass Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 229920002748 Basalt fiber Polymers 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
- F16F1/3665—Wound springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/02—Pretreatment of the fibres or filaments
- C22C47/06—Pretreatment of the fibres or filaments by forming the fibres or filaments into a preformed structure, e.g. using a temporary binder to form a mat-like element
- C22C47/062—Pretreatment of the fibres or filaments by forming the fibres or filaments into a preformed structure, e.g. using a temporary binder to form a mat-like element from wires or filaments only
- C22C47/064—Winding wires
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/021—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by their composition, e.g. comprising materials providing for particular spring properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/06—Wound springs with turns lying in cylindrical surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/12—Wound spring
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0208—Alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0241—Fibre-reinforced plastics [FRP]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/001—Specific functional characteristics in numerical form or in the form of equations
- F16F2228/005—Material properties, e.g. moduli
- F16F2228/007—Material properties, e.g. moduli of solids, e.g. hardness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2234/00—Shape
- F16F2234/02—Shape cylindrical
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Springs (AREA)
- Vehicle Body Suspensions (AREA)
- Laminated Bodies (AREA)
Description
なお、芯材10とFRP層11との間に、絶縁性材料、例えば絶縁性のガラス繊維強化プラスチック(GFRP)層や、芯材10の表面に形成した絶縁性の酸化被膜からなる電蝕防止層(電蝕防止部)を設けてもよい。図6は、本実施の形態の変形例に係るコイルばねの構成を示す模式図である。図6に示すコイルばね1aは、芯材10とFRP層11との間に、絶縁性材料からなる電蝕防止層13が設けられている。電蝕防止層13は、例えば、絶縁性のGFRP層、アルマイト層などの絶縁性の酸化被膜で形成される。例えば、電蝕防止層13の厚さ(芯材10の径方向の厚さ)は絶縁性が確保できればよく、例えばGFRP層では0.1mm程度でも十分効果が得られる。電蝕防止層13の形成により、芯材10の電蝕による劣化を防止することができる。
芯材としてφ7mmの棒状のアルミニウム合金(5000系)を使用し、強化繊維として、炭素繊維束であるトウプリプレグを使用した。5000系アルミニウム合金は、冷間加工後に加熱により安定化処理を施してなり、アルミニウムを主成分とするアルミニウム−マグネシウム合金である。トウプリプレグは、エポキシ樹脂を33wt%含有した12000本の炭素繊維の束である。
芯材としてφ7mmの棒状のアルミニウム材料(1000系)を使用した以外は実施例1と同様に行った。1000系アルミニウムは、冷間加工後に加工硬化してなる純度99.7%以上の純アルミニウムである。得られた線材を実施例2に係る弾性部材用線材とした。
芯材としてφ7mmの棒状のポリプロピレン(PP)樹脂材料を使用した以外は実施例1と同様に行った。得られた線材を比較例に係る弾性部材用線材とした。
上述したようにして得られた線材の長手方向の中央表面部に三軸のひずみゲージを貼付し、該線材の端部をガラス強化繊維プラスチック(GFRP)製の把持部材で把持した後、高千穂精機株式会社製のねじり試験機を用いてねじり強度試験を行った。本ねじり試験では、線材の中心軸のまわりの回転速度を0.3°/秒として試験を行った。本ねじり強度試験により、線材(炭素繊維)の静的ねじり強度を求めた。
上述したねじり強度試験により得られた応力−ひずみ線図の傾きをもとに、剛性率を算出した。
また、得られた線材に対して、片振りねじり疲労試験を行った。具体的には、最大応力が260MPa、応力比が0.1の片振りとし、一定の角度でねじり荷重を線材に加えてねじり応力を測定し、これを30万回繰り返して、最初に測定されたねじり応力と、各回で測定されたねじり応力とから応力低下率を求めた。応力低下率は、比較例(ポリプロピレン)における応力低下率の最大値を1として規格化した値とした。
10,110 芯材
11,111 繊維強化プラスチック(FRP)層
12,112 強化繊維
13 電蝕防止層
100 弾性部材用線材
Claims (13)
- 弾性部材を作製するための弾性部材用線材であって、
金属または合金を用いて形成され、弾性変形可能な芯材と、
前記芯材に巻回してなる繊維、および少なくとも該繊維の一部に設けられて該繊維同士を固着する熱硬化性樹脂からなり、前記芯材の外表面を覆うFRP層と、
を備え、
前記繊維の前記芯材に対する巻付け方向が、外部から加わる荷重に応じて当該弾性部材用線材に印加される、当該弾性部材用線材の長手軸に対して40°より大きく50°以下をなす方向の引張り荷重、および前記引張り荷重の方向と交差する方向の圧縮荷重のうち、前記引張り荷重の方向に沿った方向であり、
前記芯材の熱膨張率は、前記FRP層の熱膨張率より小さい
ことを特徴とする弾性部材用線材。 - 絶縁性材料を用いて形成され、前記芯材と前記繊維との間に設けられる電蝕防止部
をさらに備えたことを特徴とする請求項1に記載の弾性部材用線材。 - 前記FRP層における前記繊維の含有率が、50vol%以上91vol%以下である
ことを特徴とする請求項1または2に記載の弾性部材用線材。 - 前記繊維は、前記芯材に対する周回方向に沿って連続している
ことを特徴とする請求項1〜3のいずれか一つに記載の弾性部材用線材。 - 前記芯材の中心軸と前記繊維の巻付け方向とのなす角度が、40°より大きく50°以下である
ことを特徴とする請求項1〜4のいずれか一つに記載の弾性部材用線材。 - 前記繊維の巻付け角度が、一定である
ことを特徴とする請求項5に記載の弾性部材用線材。 - 前記芯材の膨張率は、45×10-6/K以下である
ことを特徴とする請求項1に記載の弾性部材用線材。 - 当該弾性部材用線材の剛性率が、12GPa以上である
ことを特徴とする請求項1〜7のいずれか一つに記載の弾性部材用線材。 - 当該弾性部材用線材の静的ねじり強度が、500MPa以上である
ことを特徴とする請求項1〜8のいずれか一つに記載の弾性部材用線材。 - 前記芯材が、マグネシウムを2%以上含有するアルミニウム合金からなる
ことを特徴とする請求項1〜9のいずれか一つに記載の弾性部材用線材。 - 請求項1〜10のいずれか一つに記載の弾性部材用線材を用いてなることを特徴とする弾性部材。
- 前記弾性部材用線材を螺旋状に巻回してなることを特徴とする請求項11に記載の弾性部材。
- 自動車用の懸架ばねであることを特徴とする請求項12に記載の弾性部材。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015167277 | 2015-08-26 | ||
JP2015167277 | 2015-08-26 | ||
PCT/JP2016/075096 WO2017034034A1 (ja) | 2015-08-26 | 2016-08-26 | 弾性部材用線材および弾性部材 |
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JPWO2017034034A1 JPWO2017034034A1 (ja) | 2018-05-24 |
JP6440847B2 true JP6440847B2 (ja) | 2018-12-19 |
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US (1) | US20200208702A1 (ja) |
EP (1) | EP3343058A4 (ja) |
JP (1) | JP6440847B2 (ja) |
CN (1) | CN107923465A (ja) |
WO (1) | WO2017034034A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2017163860A1 (ja) * | 2016-03-23 | 2017-09-28 | 日本発條株式会社 | コイルばね |
DE102018129549B9 (de) * | 2018-11-23 | 2022-08-18 | Action Composites Hightech GmbH | Gestaltung der Enden von Schraubenfedern |
GB2586486B (en) * | 2019-08-21 | 2022-03-09 | Jaguar Land Rover Ltd | Structural material for fabricating a vehicle component |
US11940031B2 (en) * | 2022-03-24 | 2024-03-26 | Nhk Spring Co., Ltd. | Coil spring |
US11821485B1 (en) | 2022-06-01 | 2023-11-21 | Nhk Spring Co., Ltd. | Coil spring |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5740373Y2 (ja) * | 1978-09-19 | 1982-09-04 | ||
CA1154042A (en) * | 1979-07-12 | 1983-09-20 | Frank H. Doyal | Fiber-reinforced tubular spring |
JPS5814932B2 (ja) * | 1979-10-18 | 1983-03-23 | 加藤発条株式会社 | ファイバ−強化樹脂コイルばね |
JPS6032539B2 (ja) * | 1980-06-23 | 1985-07-29 | 日産自動車株式会社 | コイルスプリングの製造方法 |
JPS597054B2 (ja) * | 1981-08-07 | 1984-02-16 | 日立化成工業株式会社 | 繊維強化プラスチック製コイルバネおよびその製造方法 |
JPS59196218A (ja) * | 1983-04-21 | 1984-11-07 | Arisawa Seisakusho:Kk | Frpバネの製造法 |
US5549370A (en) * | 1994-11-07 | 1996-08-27 | Folsom; Mark F. | Fiber-reinforced plastic springs with helical fiber wind |
JP2003012837A (ja) * | 2001-06-27 | 2003-01-15 | Toray Ind Inc | 繊維強化複合材料用エポキシ樹脂組成物、プリプレグおよび繊維強化複合材料 |
JP2003028220A (ja) * | 2001-07-16 | 2003-01-29 | Minoru Nakazawa | 異方性frpコイルばね |
JP2004360835A (ja) * | 2003-06-06 | 2004-12-24 | Kayaba Ind Co Ltd | ショックアブソーバの取付部 |
JP4414811B2 (ja) * | 2004-05-12 | 2010-02-10 | 日本精線株式会社 | 耐熱ばね用ステンレス鋼線、及びそれを用いた耐熱ばね |
JP2006226327A (ja) * | 2005-02-15 | 2006-08-31 | Kyoto Institute Of Technology | Frp製コイルばね及びその生産方法 |
JP5477155B2 (ja) * | 2010-05-14 | 2014-04-23 | 三菱マテリアル株式会社 | セラミックス材と金属材との接合体および接合方法 |
JP5548516B2 (ja) * | 2010-05-14 | 2014-07-16 | 日本発條株式会社 | 繊維強化プラスチック製ばね |
-
2016
- 2016-08-26 CN CN201680047681.4A patent/CN107923465A/zh active Pending
- 2016-08-26 JP JP2017536497A patent/JP6440847B2/ja active Active
- 2016-08-26 US US15/753,656 patent/US20200208702A1/en not_active Abandoned
- 2016-08-26 WO PCT/JP2016/075096 patent/WO2017034034A1/ja unknown
- 2016-08-26 EP EP16839381.7A patent/EP3343058A4/en not_active Withdrawn
Also Published As
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JPWO2017034034A1 (ja) | 2018-05-24 |
CN107923465A (zh) | 2018-04-17 |
EP3343058A4 (en) | 2019-05-01 |
EP3343058A1 (en) | 2018-07-04 |
WO2017034034A1 (ja) | 2017-03-02 |
US20200208702A1 (en) | 2020-07-02 |
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