JP2005009545A - Vibration proof fastener - Google Patents

Vibration proof fastener Download PDF

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Publication number
JP2005009545A
JP2005009545A JP2003172879A JP2003172879A JP2005009545A JP 2005009545 A JP2005009545 A JP 2005009545A JP 2003172879 A JP2003172879 A JP 2003172879A JP 2003172879 A JP2003172879 A JP 2003172879A JP 2005009545 A JP2005009545 A JP 2005009545A
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Japan
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fastener
vibration
rubber
recess
buffer
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JP2003172879A
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Japanese (ja)
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Mamoru Ueno
護 上野
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Individual
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Individual
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration proof fastener capable of securely preventing its rotation since vibration caused by the operation of equipment is absorbed and attenuated by a damping body, an energization force by the damping body occurs in the relation thereof with a tightened member, and particularly the freedom degree of the damping body fittedly inserted into a recessed part at the seat face of the fastener is restricted by the recessed part and, therefore, the damping body is not deformed by vibration and stable energization force is supplied to the tightened member at all times and maintained, and the fastener resists the rotation thereof in the loosening direction due to vibration, and also capable of extremely increasing workability and handleability since parts such as washers are not required in the tightening and mounting operations. <P>SOLUTION: This fastener 1 is used for tightening members to each other or tightening the members. The recessed part 2b is formed in the seat face 2a thereof, and the damping body 3 is inserted and fitted in the recessed part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、部材を締結具で締結後に地震その他の振動等によって当該締結具に外力が加えられても、当該外力を吸収して減衰し、締結具の緩みや脱落を防止し得るようにした耐振性締結具に関する。
【0002】
【従来の技術】
接着や溶接以外の方法で、二以上の複数の部材を締結するためには、ネジ或いはボルトとナット等の締結具を用いるのが一般的であり、建築物、家具、機器その他多くの構造物が複数の部材を締結具で結合することにより形成されている。
【0003】
これらの締結具は、ドライバーやスパナ或いはレンチ等の工具を使って部材どうしを締結させるもの、即ち、その締め付け力によって部材どうしを結合するものであるが、連続的な振動が与えられるとこの締め付け力が緩和され、緩みや脱落等が生じ、以下に記載の如きの問題が発生する。
【0004】
【発明が解決しようとする課題】
即ち、機器等に取り付けられた締結具が、当該機器の運転などによって生ずる振動により緩み、機器内に落下して当該機器にダメージを与えたり、故障等の原因となるなどの問題がある。
【0005】
又、建築物等に取り付けられた締結具が、近辺を通行する自動車等から発生する振動に暴露されることにより、当該締結具に緩みが生じて落下し、通行人に怪我を負わせたりする事故を招くといった問題もある。
【0006】
そのため、通常このような振動に暴露されることが予想される機器や建築物等に締結具を取り付ける際には、板バネ、座金等のワッシャを締結具と締結部の間に挟み、振動を緩和するといった手段を講ずるのが一般的であるが、このワッシャによる振動緩和は、当該ワッシャの線形弾性によるものであることから、締結具の長さ方向の振動のみしか緩和することできないため、前記問題を解決するには充分とはいえない。
【0007】
そこで最近では、ワッシャの片面或いは両面にゴムを被覆して、当該ゴムにより振動を緩和しようとする技術手段が開発されている(例えば、特許文献1及び引用文献2)。
【0008】
【特許文献1】実開昭58−140315号公報
【特許文献2】特開昭61−215805号公報
【0009】
又、ごく最近では、ナット座面の拡大部内に弾性体を内蔵することにより、地震、振動等のボルト・ナットのネジ部に発生する外力を吸収、減衰し、ネジの損傷、破壊を防ぐ技術的手段が開発されている(例えば、特許文献3)
【0010】
【特許文献3】特開平10−267024号公報
【0011】
しかしながら、ワッシャを用いて振動を緩和させようとする手段は、結局のところ締結具の部品点数を増加させることになり、保管、管理が頓雑で紛失しやすく、又、持ち運びの際に落としたりするため危険性があり、更に、取付時の取扱性が悪くなるといった問題がある。
【0012】
又、ナットにおける座面の拡大部内に弾性体を内蔵する手段にあっては、特殊な構造のナットを要するものであり、品質の揃ったナットを提供し難く、又、締結具自体のコストが高くなるといった問題もある。
【0013】
本発明者は、このような問題を解決すべく鋭意・検討を重ねた結果、締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されていることにより、振動等の外力が加わっても緩み難くなり、当該締結具の緩んでの落下を防止し得るとの知見を得たのである。
【0014】
即ち、本発明者は、締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されていると、機器の運転等によって生ずる振動を当該緩衝体が吸収して減衰する上、緩衝体による付勢力が締結される部材との関連において発生し、しかも特に、締結具の座面における凹部に嵌挿、装着された緩衝体は当該凹部によってその自由度が規制されるので、振動によって変形する事もなく常に安定した付勢力が締結される部材に供給、維持される結果、締結具が緩む方向に回転しようとするのに対して逆らって突っ張っるので、その回転が確実に防止されるのであり、又、締結、取付作業中においては、ワッシャなどの部品を必要としないため作業性や取扱性も至極向上するとの知見を得たのである。
【0015】
又、本発明者は、締結具の座金における凹部に緩衝体を嵌挿、装着するだけの構成のため、締結具の製造コストも低く、安価な耐振性締結具となり得るとの知見も得たのである。
【0016】
本発明は、前記知見に基づき完成されたものであり、機器の運転等によって生ずる振動を当該緩衝体が吸収して減衰する上、緩衝体による付勢力が締結される部材との関連において発生し、しかも特に、締結具の座面における凹部に嵌挿、装着された緩衝体は当該凹部によってその自由度が規制されるので、振動によって変形する事もなく常に安定した付勢力が締結される部材に供給、維持される結果、振動によって締結具が緩む方向に回転しようとするのに対して逆らって突っ張っるので、その回転が確実に防止されるのであり、又、締結、取付作業中においては、ワッシャなどの部品を必要としないため作業性や取扱性を至極向上させた耐振性締結具を提供することを目的とする。
【0017】
【課題を解決するための手段】
本発明に係る耐振性締結具においては、前記目的を達成するために、部材どうしの締結又は部材の締結に用いられる締結具であって、この締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されていることを特徴とするものである。
以下、本発明について詳細に説明する。
【0018】
本発明が好適に適用される締結具としては、いわゆる「ねじ締結」によって、部材どうしの締結又は部材の締結、結合させるものであれば特に限定されるものではないが、具体的には、例えばネジ、ボルト、ナット等のネジ山を刻んだ締結具を挙げることができる。
【0019】
又、前記締結具の材質としては、特に限定されるものではないが、具体的には、例えば金属材料に限らず、合成樹脂材料等も挙げられる。
【0020】
そして、本発明に係る締結具おいては、このような締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されている点に最も大きな特徴を有する。
【0021】
ここで、締結具の「座面」とは、当該締結具で部材を締結した際に、当該部材の締結部に接触する部分のことをいい、例えば、ネジやボルト等においては、所謂ネジ頭の下側面(裏面)が該当し、又、ナットにおいてはその上下面のいずれか一方の接触面が挙げられる。
【0022】
本発明に係る耐振性締結具おいては、このように、締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されていると、緩衝体を座面の凹部に備え付けるのが極めて容易になるのであり、又、機器の運転等によって生ずる振動を当該緩衝体が吸収して減衰する上、緩衝体による付勢力が締結される部材との関連において発生し、しかもこの付勢力によって締結具が緩む方向に回転するのが防止される。
【0023】
そして、それに加えて、特に、本発明においては、締結具の座面における凹部に嵌挿、装着された緩衝体が当該凹部の側壁に接当して緩衝体の変形や復元が防止され、その自由度が規制されるので、振動等の外力が作用しても変形や復元する事もなく常に安定した付勢力が締結される部材に供給、維持される結果、振動等の外力によって締結具が緩む方向に回転しようとするのに対して逆らって突っ張っるので、その回転が確実に防止されるのであり、又、締結・取付作業中においては、ワッシャなどの部品を必要としないため作業性や取扱性を至極向上させることができるのである。
【0024】
又、本発明に係る耐振性締結具においては、十分な緩衝能を発現させるためには、緩衝体にある程度の厚みが必要であるが、このように比較的厚みのある緩衝体を接着剤等を用いて座面に直接接着すると、締結の際、所謂「あたり(締め付けの終点)」が不明確となり、締め付け不足を起こしたり、締め付けすぎて当該緩衝体を破断させたりするおそれがある。
【0025】
ところが、本発明においては、座面に凹部を形成し、この凹部に緩衝体の一部を嵌挿、装着されていることにより、緩衝体の厚みを確保することができるのであり、しかも、締結の際の「あたり」を明瞭な状態で維持することができるから、理想的な締結が可能になるのである。
【0026】
更に、本発明においては、凹部の少なくとも一部分に、締結具を締め付けた際に弾性変形した緩衝体の一部を入り込ませるための案内部を設けることが特に好ましく、このように構成することにより、過剰な締結力が加わると、緩衝体の一部が弾性変形してその案内部に入り込んで一層緩衝体の破断を防止することができる上、緩衝体の厚みの確保や締結の際の「あたり」を明瞭にすることができるのである。
【0027】
又、本発明に係る耐振性締結具において、用いられる「緩衝体」としては、金属製のバネやゴム状弾性体等が挙げられるのであるが、特に、ゴム状弾性体が、以下に述べる理由より、望ましい。
【0028】
即ち、その理由は、本発明に係る耐振性締結具を用いて部材を締結すると、前述のように、緩衝体によって当該耐振性締結具の緩みが防止されるのであるが、特に、緩衝体としてゴム状弾性体を用いた場合、この耐振性締結具で部材を締結すると、ゴム状弾性体は部材との摩擦力が高く、しかもゴム状弾性体が部材表面の微細な凹凸に食い込む結果、振動等の外力によって締結具が緩む方向に回転しようとするのに対して一層逆らって確実に突っ張っるので、その回転が一層確実に防止されるからである。
【0029】
前記ゴム状弾性体としては特に限定されるものではなく、天然ゴム或いは合成ゴム等、いずれのものでも良く、具体的には、例えば天然ゴムの他、ブタジエンゴム(BR)、イソプレンゴム(IR)、スチレン−ブタジエンゴム(SBR)、ニトリルゴム、スチレンゴム、シリコーンゴム、アクリロニトリル−ブタジエンゴム(NBR)、クロロプレンゴム(CR)、イソブチレン−イソプレンゴム(IIR)、エチレン−プロピレン・コポリマー(EPM)、エチレン−プロピレン−ジエン・ターポリマー(EPDM)、クロロスルホン化ポリエチレン(CSM)、塩素化ポリエチレン(CM)、エチレン−酢酸ビニル・コポリマー(EVA)、ポリアルキレン・スルフィド、シリコンゴム、ポリ(クロル・トリフルオロエチレン)(CFM)、フッ化ビニリデン−6フッ化プロピレン・コポリマー(FPM)、ウレタンゴム(AU,EU)、プロピレンオキシドゴム(POR)、エピクロルヒドリンゴム(CHR)、アクリル酸エステル−アクリロニトリル・コポリマー(ANM)又はアクリル酸エステル−2−クロルエチルビニルエーテル・コポリマー(ACM)等の合成ゴムなどが挙げられる。
【0030】
そして、本発明に係る耐振性締結具においては、緩衝体を座面に備えてなるものであるが、座面の全周に亙って環状又は同心円状に複数備えられたものに限定されるものではなく、座面の一部分に水玉状或いは縞状に備えられたものでも良いのであり、これについては緩衝体の素材や所要の緩衝能に応じて適宜決定すればよいのである。
【0031】
ここで、前記緩衝体を座面に備え付ける方法としては、締結具の座面に凹部を形成し、この凹部に緩衝体の一部を嵌挿、装着すれば良いのであり、この場合、所望により、座面の凹部に接着剤等を用いて緩衝体を直接固定するのが安定するので特に好ましい。
【0032】
【発明の実施の形態】
以下、本発明に係る耐振性締結具の実施例を図面に基づき説明するが、本発明はこの実施例に限定されるものではない。
【0033】
本発明に係る耐振性締結具は、所謂「ねじ締結」により、部材どうしの締結又は部材の締結に用いられるものであれば特に限定されるものではないが、具体的に例えば、図1に示す先鋭ネジ(A)、平ネジ(B)、ボルト(C)、ナット(D)等を挙げることができる。
【0034】
又、前記締結具1の材質についても特に制限されるものではなく、具体的には、例えば金属製のものや高分子樹脂製のもの更にセラミックス製のものなどが挙げられる。
【0035】
そして、本発明をボルト(C)に適用した場合について説明すると、図2に示すように、この耐振性締結具(ボルト)1におけるネジ頭2の座面2aには凹部2bが形成され、且つ該凹部2bには緩衝体3が嵌挿、装着されており、この緩衝体3は、例えば図2の(A)〜(D)に示すように、座面2aの一部分に水玉状(A)、縞状(B)、環状(C)或いは同心円状に複数(D)に備えられていても良いのであり、これについては緩衝体3の素材としては金属製バネやゴム状弾性体等が挙げられるのであり、特に、ゴム状弾性体は部材との摩擦力が高く、しかもゴム状弾性体が部材表面の微細な凹凸に食い込む結果、振動等の外力によって耐振性締結具1が緩む方向に回転しようとするのに対して一層逆らって確実に突っ張っるので、その回転が一層確実に防止されるので望ましい。
尚、4は耐振性締結具1におけるネジ部である。
【0036】
ところで、前記緩衝体3を座面2aに備え付ける方法としては、図3(A)の断面図に示すように、座面2aには凹部2bを形成し、この凹部2bには緩衝体3の一部を嵌挿、装着することによって、当該緩衝体3を座面2aに備え付けても良く、この場合、接着剤等を用いて当該座面2aに緩衝体3を直接接着しても良いのである。
【0037】
特に、本発明においては、図3(D)の断面図に示すように、凹部2bの少なくとも一部分に、締結具1を締め付けた際に弾性変形した緩衝体3の一部を入り込ませるための案内部2cを設けることが好ましく、このように構成することにより、締結の際の緩衝体3の破断を防止することができるのであり、又、緩衝体3の厚みの確保や締結の際の「あたり」を明瞭にすることができるのである。
【0038】
図3(D)に示す耐振性締結具1を用い、厚さ1.2mmの鋼板2枚を締結し、バイブレータで強い振動を3日間に亙って与えたところ、その振動を緩衝体(ゴム状弾性体)3が吸収して減衰する上、緩衝体3による付勢力が鋼板との関連において発生し、しかも特に、耐振性締結具1の座面2aにおける凹部2bに嵌挿、装着された緩衝体3は当該凹部2bによってその自由度が規制されるので、振動によって変形する事もなく常に安定した付勢力が鋼板に供給、維持され、耐振性締結具1の緩みは認められなかった。
【0039】
即ち、バイブレータで強い振動を3日間に亙って与えたところ、緩衝体3の破断がなく、しかも振動によって耐振性締結具1が緩む方向に回転しようとするのに対して逆らって突っ張っるので、その回転が確実に防止される結果、耐振性締結具1の緩みが全く認められなかった。
【0040】
一方、市販されている同タイプ締結具を用い、この締結具に市販のワッシャを介装し、同様の試験を行ったところ、振動開始後10時間程度で締結具の緩みが認められると共に、金属が擦れ合う高い騒音が発生することが認められた
【0041】
【発明の効果】
以上説明したように、本発明に係る耐振性締結具においては、締結具の座面に凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されているので、緩衝体を座面の凹部に備え付けるのが極めて容易になるのであり、又、機器の運転等によって生ずる振動を当該緩衝体が吸収して減衰する上、緩衝体による付勢力が締結される部材との関連において発生し、しかもこの付勢力によって締結具が緩む方向に回転するのが防止され、締結具が外れて落下するのが防止される結果、機器等の誤動作や騒音の発生が無くなったり、建築・建設物や構造物の破損が無くなったり、締結具の落下事故が無くなって安全性が至極向上するなどの効果を奏するのである。
【0042】
そして、それに加えて、特に、本発明においては、締結具の座面における凹部に嵌挿、装着された緩衝体が当該凹部の側壁に接当して緩衝体の変形や復元が防止され、その自由度が規制されるので、振動等の外力が作用しても変形や復元する事もなく常に安定した付勢力が締結される部材に供給、維持される結果、振動等の外力によって締結具が緩む方向に回転しようとするのに対して逆らって突っ張っるので、その回転が確実に防止されるのであり、又、締結・取付作業中においては、ワッシャなどの部品を必要としないため作業性や取扱性を至極向上させることができるなどの効果を奏するのである。
【0043】
又、本発明に係る耐振性締結具においては、座面に凹部を形成し、この凹部には緩衝体の一部を嵌挿、装着されていることによって緩衝体の厚みを確保することができるのであり、しかも、締結の際の明瞭な締結状態を確認、維持することができるから、理想的な締結が可能になるなどの効果を奏するのである。
【0044】
更に、本発明に係る耐振性締結具においては、特に、緩衝体としてゴム状弾性体を用い、この耐振性締結具で部材を締結すると、前述の効果に加えて、ゴム状弾性体は部材との摩擦力が高く、しかもゴム状弾性体が部材表面の微細な凹凸に食い込む結果、振動等の外力によって締結具が緩む方向に回転しようとするのに対して一層逆らって確実に突っ張っるので、その回転が一層確実に防止され、一層安全性などが向上するなどの効果を奏するのである。
【0045】
本発明においては、凹部の少なくとも一部分に、締結具を締め付けた際に弾性変形した緩衝体の一部を入り込ませるための案内部を設けることが特に好ましく、このように構成することにより、過剰な締結力が加わると、緩衝体の一部が弾性変形してその案内部に入り込んで一層緩衝体の破断を防止することができる上、緩衝体の厚みの確保や締結の際の明瞭な締結状態を確保することができるなどの効果を奏するのである。
【図面の簡単な説明】
【図1】図1は、本発明が好適に適用される締結具を示す正面図である。
【図2】図2は、本発明に係る耐振性締結具を示す説明図である。
【図3】図3は、本発明に係る耐振性締結具を示す他の要部断面説明図である。
【符号の説明】
A 先鋭ネジ
B 平ネジ
C ボルト
D ナット
1 (耐振性)締結具
2 ネジ頭
2a 座面
2b 凹部
2c 案内部
3 緩衝体
4 ネジ部
5 案内部
[0001]
BACKGROUND OF THE INVENTION
In the present invention, even when an external force is applied to the fastener due to an earthquake or other vibration after the member is fastened with the fastener, the external force is absorbed and attenuated, and the fastener can be prevented from loosening or falling off. It relates to a vibration-proof fastener.
[0002]
[Prior art]
In order to fasten two or more members by a method other than bonding or welding, it is common to use fasteners such as screws or bolts and nuts. Buildings, furniture, equipment and many other structures Is formed by connecting a plurality of members with fasteners.
[0003]
These fasteners use a screwdriver, spanner, wrench, or other tool to fasten the members together, that is, the members are joined together by their tightening force. The force is relaxed, loosening, dropping off, etc. occur, causing problems as described below.
[0004]
[Problems to be solved by the invention]
That is, there is a problem that a fastener attached to a device or the like is loosened due to vibration generated by the operation of the device or the like, and falls into the device and damages the device or causes a failure or the like.
[0005]
In addition, when a fastener attached to a building or the like is exposed to vibrations generated from a car or the like passing in the vicinity, the fastener may loosen and fall, causing a passerby to be injured. There is also the problem of causing an accident.
[0006]
Therefore, when attaching fasteners to equipment or buildings that are normally expected to be exposed to such vibrations, washers such as leaf springs and washers are sandwiched between the fasteners and the fastening parts, and vibrations are generated. It is common to take measures such as mitigating, but since the vibration relaxation by this washer is due to the linear elasticity of the washer, it can only mitigate only the vibration in the length direction of the fastener. Not enough to solve the problem.
[0007]
Therefore, recently, technical means have been developed in which rubber is coated on one side or both sides of a washer so as to reduce vibration with the rubber (for example, Patent Document 1 and Cited Document 2).
[0008]
[Patent Document 1] Japanese Utility Model Publication No. 58-140315 [Patent Document 2] Japanese Patent Application Laid-Open No. 61-215805
Also, recently, by incorporating an elastic body in the enlarged part of the nut seat surface, the technology that absorbs and attenuates external forces generated in bolts and nuts such as earthquakes and vibrations to prevent screw damage and destruction. An effective means has been developed (for example, Patent Document 3).
[0010]
[Patent Document 3] Japanese Patent Application Laid-Open No. 10-267024 [0011]
However, the means of using a washer to reduce vibrations ultimately increases the number of fastener parts, which is messy to store and manage and can easily be lost. Therefore, there is a problem that handling is difficult at the time of mounting.
[0012]
In addition, the means for incorporating the elastic body in the enlarged portion of the seating surface of the nut requires a nut with a special structure, and it is difficult to provide a nut with uniform quality, and the cost of the fastener itself is low. There is also a problem of becoming higher.
[0013]
As a result of intensive studies and studies to solve such problems, the present inventor has formed a recess in the seating surface of the fastener, and a buffer is inserted and mounted in the recess. It has been found that even when an external force such as vibration is applied, it is difficult to loosen and the fastener can be prevented from falling loose.
[0014]
In other words, the present inventor, when a recess is formed in the seating surface of the fastener, and the buffer is inserted and mounted in the recess, the buffer absorbs vibrations generated by the operation of the device. In addition, the biasing force generated by the shock absorber is generated in relation to the member to be fastened, and in particular, the degree of freedom of the shock absorber that is inserted into and attached to the concave portion of the seat surface of the fastener is restricted by the concave portion. As a result, a stable urging force is always supplied to and maintained by the member to be fastened without being deformed by vibration. It has been found that rotation is reliably prevented, and that workability and handling are extremely improved because no parts such as washers are required during fastening and mounting operations.
[0015]
In addition, the inventor has also obtained knowledge that the manufacturing cost of the fastener is low and it can be an inexpensive vibration-resistant fastener because the buffer body is simply inserted into and attached to the recess in the washer of the fastener. It is.
[0016]
The present invention has been completed on the basis of the above knowledge, and is generated in relation to a member to which the buffer body absorbs and attenuates the vibration generated by the operation of the device and the urging force by the buffer body is fastened. Moreover, in particular, since the degree of freedom of the shock absorber inserted and attached to the recess in the seat surface of the fastener is restricted by the recess, a member that is always fastened with a stable urging force without being deformed by vibration. As a result of being supplied and maintained, the rotation of the fastener due to vibration tends to be countered against the rotation, so that the rotation is surely prevented, and during fastening and mounting operations An object of the present invention is to provide a vibration-proof fastener with extremely improved workability and handling because no parts such as washers are required.
[0017]
[Means for Solving the Problems]
In the vibration-proof fastener according to the present invention, in order to achieve the above-mentioned object, the fastener is used for fastening members or fastening members, and a recess is formed on the seating surface of the fastener, and A buffer is inserted into and attached to the recess.
Hereinafter, the present invention will be described in detail.
[0018]
The fastener to which the present invention is suitably applied is not particularly limited as long as the members are fastened to each other or the members are fastened and joined by so-called “screw fastening”. Mention may be made of fasteners engraved with threads such as screws, bolts and nuts.
[0019]
Further, the material of the fastener is not particularly limited, but specifically, for example, not only a metal material but also a synthetic resin material can be used.
[0020]
The fastener according to the present invention has the greatest feature in that a concave portion is formed in the seating surface of such a fastener, and a buffer is fitted in and attached to the concave portion.
[0021]
Here, the “seat surface” of the fastener means a portion that comes into contact with the fastening portion of the member when the member is fastened by the fastener. For example, in a screw or bolt, a so-called screw head is used. The lower side surface (rear surface) corresponds to this, and in the case of a nut, one of the upper and lower contact surfaces is mentioned.
[0022]
In the vibration-proof fastener according to the present invention, when the recess is formed in the seat surface of the fastener and the buffer body is inserted and attached to the recess, the buffer body is It is very easy to install in the concave portion of the body, and the shock absorber absorbs and attenuates the vibration generated by the operation of the device, and the biasing force by the shock absorber is generated in relation to the member to be fastened. In addition, the biasing force prevents the fastener from rotating in the loosening direction.
[0023]
In addition, in addition, in the present invention, in particular, in the present invention, the shock absorber inserted into and attached to the concave portion on the seat surface of the fastener comes into contact with the side wall of the concave portion to prevent deformation and restoration of the shock absorber. Since the degree of freedom is restricted, a stable biasing force is always supplied to and maintained in the member to be fastened without being deformed or restored even if an external force such as vibration is applied. Since it is stretched against the direction of rotation in the loosening direction, the rotation is reliably prevented, and parts such as a washer are not required during fastening and installation work, and workability and The handleability can be greatly improved.
[0024]
In addition, in the vibration-proof fastener according to the present invention, in order to develop a sufficient buffer capacity, the buffer body needs to have a certain thickness. If it is directly bonded to the seating surface, the so-called “around (end point of tightening)” becomes unclear at the time of fastening, which may cause insufficient tightening or excessive tightening to break the buffer body.
[0025]
However, in the present invention, a concave portion is formed in the seating surface, and a part of the buffer body is inserted into and attached to the concave portion, so that the thickness of the buffer body can be secured, and fastening Since the “around” at this time can be maintained in a clear state, ideal fastening is possible.
[0026]
Furthermore, in the present invention, it is particularly preferable to provide a guide part for allowing a part of the buffer body elastically deformed when the fastener is tightened to at least a part of the recess. When an excessive fastening force is applied, a part of the buffer body is elastically deformed and enters the guide portion to further prevent the buffer body from being broken. Can be clarified.
[0027]
In addition, examples of the “buffer body” used in the vibration-proof fastener according to the present invention include a metal spring and a rubber-like elastic body. In particular, the rubber-like elastic body is described below. More desirable.
[0028]
That is, the reason is that when the member is fastened using the vibration-proof fastener according to the present invention, as described above, the shock-proof fastener is prevented from loosening by the shock-absorbing body. When a rubber-like elastic body is used, when the member is fastened with this vibration-proof fastener, the rubber-like elastic body has a high frictional force with the member, and the rubber-like elastic body bites into minute irregularities on the surface of the member, resulting in vibration. This is because, since the fastener is rotated more reliably against the rotation of the fastener due to the external force such as, the rotation is more reliably prevented.
[0029]
The rubbery elastic body is not particularly limited and may be any natural rubber or synthetic rubber. Specifically, for example, natural rubber, butadiene rubber (BR), isoprene rubber (IR), etc. , Styrene-butadiene rubber (SBR), nitrile rubber, styrene rubber, silicone rubber, acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR), isobutylene-isoprene rubber (IIR), ethylene-propylene copolymer (EPM), ethylene -Propylene-diene terpolymer (EPDM), chlorosulfonated polyethylene (CSM), chlorinated polyethylene (CM), ethylene-vinyl acetate copolymer (EVA), polyalkylene sulfide, silicone rubber, poly (chlor trifluoro) Ethylene) (CF ), Vinylidene fluoride-6-propylene copolymer (FPM), urethane rubber (AU, EU), propylene oxide rubber (POR), epichlorohydrin rubber (CHR), acrylate-acrylonitrile copolymer (ANM) or acrylic acid And synthetic rubbers such as ester-2-chloroethyl vinyl ether copolymer (ACM).
[0030]
And in the vibration-proof fastener according to the present invention, the cushioning body is provided on the seating surface, but is limited to those provided in a plurality of rings or concentric circles over the entire circumference of the seating surface. Instead, it may be a polka dot or striped part of the seating surface, and this may be determined as appropriate according to the material of the buffer and the required buffer capacity.
[0031]
Here, as a method of mounting the buffer body on the seat surface, a recess is formed in the seat surface of the fastener, and a part of the buffer body may be inserted and attached to the recess. It is particularly preferable to directly fix the buffer body using an adhesive or the like in the concave portion of the seating surface because it is stable.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, although an example of a vibration-proof fastener concerning the present invention is described based on a drawing, the present invention is not limited to this example.
[0033]
The vibration-proof fastener according to the present invention is not particularly limited as long as it is used for fastening members or fastening members by so-called “screw fastening”. Specifically, for example, as shown in FIG. Examples thereof include a sharp screw (A), a flat screw (B), a bolt (C), and a nut (D).
[0034]
Further, the material of the fastener 1 is not particularly limited, and specific examples thereof include metal, polymer resin, and ceramics.
[0035]
Then, the case where the present invention is applied to the bolt (C) will be described. As shown in FIG. 2, the seat surface 2a of the screw head 2 in the vibration-resistant fastener (bolt) 1 has a recess 2b, and A buffer body 3 is fitted and mounted in the recess 2b. The buffer body 3 is formed in a polka dot (A) shape on a part of the seating surface 2a as shown in FIGS. 2A to 2D, for example. , Stripes (B), rings (C), or concentric circles (D) may be provided, and the material of the buffer body 3 may be a metal spring or a rubber-like elastic body. In particular, the rubber-like elastic body has a high frictional force with the member, and as a result of the rubber-like elastic body biting into fine irregularities on the surface of the member, the anti-vibration fastener 1 rotates in the direction of loosening due to external forces such as vibration. I'm going to push it more firmly against trying to Since rotation is prevented more reliably desirable.
Reference numeral 4 denotes a screw portion in the vibration-proof fastener 1.
[0036]
By the way, as shown in the sectional view of FIG. 3 (A), the cushioning body 3 is provided on the seating surface 2a by forming a recess 2b in the seating surface 2a. The cushioning body 3 may be provided on the seating surface 2a by inserting and mounting the portion. In this case, the cushioning body 3 may be directly bonded to the seating surface 2a using an adhesive or the like. .
[0037]
In particular, in the present invention, as shown in the cross-sectional view of FIG. 3D, a guide for allowing a part of the buffer body 3 elastically deformed when the fastener 1 is tightened to enter at least a part of the recess 2b. It is preferable to provide the portion 2c. By configuring in this manner, the buffer body 3 can be prevented from being broken at the time of fastening, and the thickness of the buffer body 3 can be secured and “ Can be clarified.
[0038]
Using the vibration-resistant fastener 1 shown in FIG. 3 (D), two steel plates with a thickness of 1.2 mm were fastened, and strong vibrations were applied for 3 days with a vibrator. The elastic body 3 is absorbed and damped, and the urging force by the buffer body 3 is generated in relation to the steel plate, and in particular, it is inserted and mounted in the recess 2b in the seating surface 2a of the vibration-resistant fastener 1. Since the degree of freedom of the buffer body 3 is regulated by the concave portion 2b, a stable urging force is always supplied to and maintained on the steel plate without being deformed by vibration, and the vibration-resistant fastener 1 is not loosened.
[0039]
That is, when a strong vibration is applied with a vibrator for 3 days, the shock absorber 3 does not break and the vibration-resistant fastener 1 tries to rotate in the direction of loosening due to the vibration, so that it is pulled against the vibration. As a result of reliably preventing the rotation, the vibration-resistant fastener 1 was not loosened at all.
[0040]
On the other hand, when a similar test was performed using a commercially available same-type fastener, and a commercially available washer was interposed in this fastener, loosening of the fastener was observed about 10 hours after the start of vibration. It was recognized that high noise generated by rubbing was generated.
【The invention's effect】
As described above, in the vibration-proof fastener according to the present invention, the recess is formed in the seating surface of the fastener, and the cushioning body is fitted and attached to the recess, so the cushioning body is mounted on the seating surface. It is very easy to install in the concave portion of the body, and the shock absorber absorbs and attenuates the vibration generated by the operation of the device, and the biasing force by the shock absorber is generated in relation to the member to be fastened. In addition, this biasing force prevents the fastener from rotating in the loosening direction and prevents the fastener from coming off and falling, resulting in no malfunction of equipment or noise generation, There is an effect that the structure is not damaged, the accident of dropping the fastener is eliminated, and the safety is extremely improved.
[0042]
In addition, in addition, in the present invention, in particular, in the present invention, the shock absorber inserted into and attached to the concave portion on the seat surface of the fastener comes into contact with the side wall of the concave portion to prevent deformation and restoration of the shock absorber. Since the degree of freedom is restricted, a stable biasing force is always supplied to and maintained in the member to be fastened without being deformed or restored even if an external force such as vibration is applied. Since it is stretched against the direction of rotation in the loosening direction, the rotation is reliably prevented, and parts such as a washer are not required during fastening and installation work, and workability and There are effects such as extremely improved handling.
[0043]
Moreover, in the vibration-proof fastener according to the present invention, a recess is formed in the seating surface, and a part of the buffer body is inserted into and attached to the recess, so that the thickness of the buffer body can be secured. In addition, since a clear fastening state at the time of fastening can be confirmed and maintained, there is an effect that ideal fastening is possible.
[0044]
Furthermore, in the vibration-resistant fastener according to the present invention, in particular, when a rubber-like elastic body is used as a buffer and the member is fastened with this vibration-resistant fastener, in addition to the above-described effects, the rubber-like elastic body is a member. As a result, the rubber-like elastic body bites into the fine irregularities on the surface of the member. The rotation can be prevented more reliably, and the safety and the like can be further improved.
[0045]
In the present invention, it is particularly preferable to provide at least a part of the concave part with a guide part for allowing a part of the shock-absorbing body elastically deformed when the fastener is tightened. When a fastening force is applied, a part of the buffer body is elastically deformed and enters the guide portion to further prevent the buffer body from being broken. In addition, the buffer body thickness is secured and the fastening state is clear when fastening. The effect of being able to ensure is produced.
[Brief description of the drawings]
FIG. 1 is a front view showing a fastener to which the present invention is preferably applied.
FIG. 2 is an explanatory view showing a vibration-proof fastener according to the present invention.
FIG. 3 is a cross-sectional explanatory view of another main part showing a vibration-proof fastener according to the present invention.
[Explanation of symbols]
A Pointed screw B Flat screw C Bolt D Nut 1 (Vibration resistance) Fastener 2 Screw head 2a Seat surface 2b Recess 2c Guide part 3 Buffer 4 Screw part 5 Guide part

Claims (4)

部材どうしの締結又は部材の締結に用いられる締結具であって、この締結具の座面には凹部が形成され、且つ該凹部には緩衝体が嵌挿、装着されていることを特徴とする耐振性締結具。A fastener used for fastening members or fastening members, wherein a seating surface of the fastener is formed with a recess, and a buffer is fitted into the recess. Vibration-resistant fastener. 緩衝体がゴム状弾性体である請求項1に記載の耐振性締結具。The vibration-resistant fastener according to claim 1, wherein the shock absorber is a rubber-like elastic body. 締結具がネジ、ボルト及びナットから選ばれた少なくとも1種である請求項1又は2に記載の耐振性締結具。The vibration-resistant fastener according to claim 1 or 2, wherein the fastener is at least one selected from a screw, a bolt, and a nut. 座面の凹部における少なくとも一部には、締結具を締め付けた際に弾性変形した緩衝体の一部が入り込む案内部を設けてなる請求項1ないし3のいずれか1項に記載の耐振性締結具。The vibration-resistant fastening according to any one of claims 1 to 3, wherein a guide portion into which a part of a buffer body elastically deformed when the fastener is tightened is provided in at least a part of the concave portion of the seat surface. Ingredients.
JP2003172879A 2003-06-18 2003-06-18 Vibration proof fastener Pending JP2005009545A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5137045B1 (en) * 2012-04-10 2013-02-06 株式会社ユニオン精密 Connecting member and connecting structure
JP2017106620A (en) * 2015-10-21 2017-06-15 ザ・ボーイング・カンパニーThe Boeing Company Whisker reinforced high fracture toughness ceramic threaded fasteners

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5137045B1 (en) * 2012-04-10 2013-02-06 株式会社ユニオン精密 Connecting member and connecting structure
US8734074B2 (en) 2012-04-10 2014-05-27 Union Seimitsu Co., Ltd. Connecting member and connecting structure
JP2017106620A (en) * 2015-10-21 2017-06-15 ザ・ボーイング・カンパニーThe Boeing Company Whisker reinforced high fracture toughness ceramic threaded fasteners
US11268560B2 (en) 2015-10-21 2022-03-08 The Boeing Company Method of making whisker reinforced high fracture toughness ceramic threaded fasteners
JP7072347B2 (en) 2015-10-21 2022-05-20 ザ・ボーイング・カンパニー Whisker Reinforced High Fracture Toughness Ceramic Screw Fastener

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