JP2007211892A - Fastening set member and fastening structure using this member - Google Patents

Fastening set member and fastening structure using this member Download PDF

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JP2007211892A
JP2007211892A JP2006032569A JP2006032569A JP2007211892A JP 2007211892 A JP2007211892 A JP 2007211892A JP 2006032569 A JP2006032569 A JP 2006032569A JP 2006032569 A JP2006032569 A JP 2006032569A JP 2007211892 A JP2007211892 A JP 2007211892A
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washer
nut
bolt
fastening
insertion hole
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JP4822865B2 (en
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Teruo Nakagami
輝夫 中上
Taku Suzuki
卓 鈴木
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West Nippon Expressway Co Ltd
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West Nippon Expressway Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening structure capable of further improving the looseness preventive effect, by improving the fastening structure having a nut 2 having an axially symmetrical and cross-sectional view substantially trapezoidal recessed part 21 on one opening side of a female screw part 26, and a first washer 3 having a projection part 31 projectingly formed in an axially symmetrical and side view substantially trapezoidal shape to be fitted to its recessed part 21, having an insertion hole 35 for inserting a male screw part 41 of a bolt 4 into an upper part of the projection part 31 and making the insertion hole 35 eccentric from a central position of the projection part 31. <P>SOLUTION: This fastening structure 1B also has an elastic material second washer 5 having the insertion hole having an outer diameter substantially equal to an inner diameter of the recessed part 21 of the nut 2 and an inner diameter substantially equal to an outer diameter of the male screw part 41 of the bolt 4, and fills up a clearance of a noncontact part between the first washer 3 and the male screw part 41 of the bolt 4 by elastically deforming the second washer 5, when fastened by threaded engagement. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、構造物（例えば建築構造物）における締結用組部材及びそれを用いた締結構造体に関する。   The present invention relates to a fastening assembly member in a structure (for example, a building structure) and a fastening structure using the same.

ナット及びボルトを用いた締結構造に関して、本願発明者の一人は、発明者として含まれる特許文献１において、強固な締結を可能にするために特有形状のナットとワッシャ（座金）を提案している。   Regarding the fastening structure using nuts and bolts, one of the inventors of the present application proposes a nut and washer having a specific shape in order to enable firm fastening in Patent Document 1 included as the inventor. .

図８は、特許文献１に記載された締結構造体を示すものである。この締結構造体１０１において、ナット１０２は、雌ねじ部１２６の一方の開口側に、軸対称でかつ断面視略台形状の凹部１２１を有する。ワッシャ１０３は、ナット１０２の凹部１２１に嵌合するよう軸対称でかつ側面視略台形状に突出形成した突出部１３１を有するとともに、突出部１３１の上部１３１ａにボルト１０４の雄ねじ部１４１が挿通する挿通孔１３５を有し、しかも挿通孔１３５が突出部１３１の中心位置から偏心している。１０６及び１０７は被締結体である。この締結構造体１０１では、螺合締結したとき、ナット１０２の凹部１２１とワッシャ１０３の突出部１３１が嵌合した状態となる。このとき、ワッシャ１０３の挿通孔１３５の中心位置がワッシャ１０３の突出部１３１の中心位置に対して偏心しているので、締め付けトルクがボルト１０４のねじ山に横からの力として作用し、ワッシャ１０３の挿通孔１３５の周辺の一部がボルト１０４のねじ山に食い込む。また、ねじ山と噛み合うことによりその接触部分においてねじれが生じる。それにより、接触部分において集中的な横方向（ボルト１０４の中心軸に対して垂直方向）の力がかかるため、つまりワッシャ１０３とボルト１０４が押し付けあうため、緩み止め効果が生じる。   FIG. 8 shows a fastening structure described in Patent Document 1. As shown in FIG. In this fastening structure 101, the nut 102 has a concave portion 121 that is axially symmetric and has a substantially trapezoidal shape in cross section on one opening side of the female screw portion 126. The washer 103 has a protruding portion 131 that is axially symmetric and fits into the concave portion 121 of the nut 102 and is formed in a substantially trapezoidal shape when viewed from the side, and the male screw portion 141 of the bolt 104 is inserted into the upper portion 131a of the protruding portion 131. An insertion hole 135 is provided, and the insertion hole 135 is eccentric from the center position of the protrusion 131. 106 and 107 are fastened bodies. In this fastening structure 101, when screwed and fastened, the concave portion 121 of the nut 102 and the protruding portion 131 of the washer 103 are fitted. At this time, since the center position of the insertion hole 135 of the washer 103 is eccentric with respect to the center position of the protrusion 131 of the washer 103, the tightening torque acts as a lateral force on the thread of the bolt 104, and the washer 103 A part of the periphery of the insertion hole 135 bites into the thread of the bolt 104. Further, the meshing with the screw thread causes a twist at the contact portion. As a result, a concentrated lateral force (perpendicular to the central axis of the bolt 104) is applied at the contact portion, that is, the washer 103 and the bolt 104 are pressed against each other, thereby producing a loosening prevention effect.

特開２００２−２０６５１５号公報JP 2002-206515 A

ところで、締結構造体においての緩み止めは、従来からまた将来にかけても極めて重要なテーマであり、常に、緩み止め効果のより高い締結構造体が求められている。特許文献１に記載された締結構造体においても、同様である。   By the way, loosening prevention in a fastening structure is an extremely important theme from the past and in the future, and a fastening structure having a higher locking effect is always required. The same applies to the fastening structure described in Patent Document 1.

本願発明者は、締結構造体の緩みが微小な振動に大きく影響されることと、特許文献１に記載された締結構造体において、ワッシャ１０３とボルト１０４の雄ねじ部１４１との接触がピンポイントであってワッシャ１０３とボルト１０４の雄ねじ部１４１の間に生じる力のすべてがこの部分にかかっていることに着目し、研究の結果、以下に詳述する締結用組部材及びそれを用いた締結構造体を案出するに至った。   The inventor of the present application is that the looseness of the fastening structure is greatly influenced by minute vibrations, and in the fastening structure described in Patent Document 1, the contact between the washer 103 and the male screw part 141 of the bolt 104 is pinpointed. Attention is paid to the fact that all of the force generated between the washer 103 and the male threaded portion 141 of the bolt 104 is applied to this portion. As a result of the research, the fastening assembly described in detail below and the fastening structure using the same I came up with a body.

本発明は、係る事由に鑑みてなされたものであり、その目的は、特許文献１に記載された締結構造体を改良して更に緩み止め効果を向上させることができる締結用組部材及びそれを用いた締結構造体を提供することにある。   This invention is made | formed in view of the reason which concerns, The objective is improving the fastening structure described in patent document 1, and the assembly member for fastening which can improve a loosening prevention effect, and it It is in providing the fastening structure used.

上記目的を達成するために、請求項１に記載の締結用組部材は、雌ねじ部の一方の開口側に軸対称でかつ断面視略台形状の凹部を有するナットと、ナットの凹部に嵌合するよう軸対称でかつ側面視略台形状に突出形成した突出部を有するとともに、突出部の上部にボルトの雄ねじ部が挿通する挿通孔を有し、しかも挿通孔が突出部の中心位置から偏心している第１のワッシャと、ナットの凹部の内径に略等しい外径で、ボルトの雄ねじ部の外径に略等しい内径の挿通孔を有する弾性材料製の第２のワッシャと、を有してなり、ボルトとともに用いられる締結用組部材であって、ナットの凹部に第２のワッシャを嵌着し、ナットの凹部に第１のワッシャの突出部を対向させて、ボルトとナットにより被締結体を介装して螺合締結したとき、ナットの凹部と第１のワッシャの突出部が嵌合し、第１のワッシャの挿通孔がボルトの雄ねじ部と噛み合うことによりその接触部分において第１のワッシャのねじれが生じ、第１のワッシャとボルトの雄ねじ部との非接触部分の隙間を第２のワッシャが弾性変形して埋めることを特徴とする。   In order to achieve the above object, the assembly member for fastening according to claim 1 is fitted to a nut having an axially symmetric recess having a trapezoidal shape in cross section on one opening side of the female screw portion, and the recess of the nut. The projection is formed so as to be axially symmetric and substantially trapezoidal in side view, and has an insertion hole through which the male screw portion of the bolt is inserted, and the insertion hole is offset from the center position of the projection. A first washer having a center, and a second washer made of an elastic material having an outer diameter substantially equal to the inner diameter of the concave portion of the nut and having an inner diameter substantially equal to the outer diameter of the male thread portion of the bolt. A fastening member used together with a bolt, wherein a second washer is fitted in the recess of the nut, and the projecting portion of the first washer is opposed to the recess of the nut, and the fastened body by the bolt and the nut When screwing and fastening The first washer and the bolt are engaged with each other, and the insertion hole of the first washer meshes with the male threaded portion of the bolt, whereby the first washer twists at the contact portion. The second washer is elastically deformed to fill the gap in the non-contact portion with the male screw portion.

請求項２に記載の締結用組部材は、請求項１に記載された締結用組部材において、前記ナットの凹部は、第２のワッシャを嵌着する窪み部分を有していることを特徴とする。   The fastening member according to claim 2 is characterized in that in the fastening member described in claim 1, the concave portion of the nut has a recessed portion into which the second washer is fitted. To do.

請求項３に記載の締結用組部材は、請求項１又は２に記載された締結用組部材において、前記第２のワッシャの挿通孔は、その内周縁が径方向に凹凸状にしてあることを特徴とする。   The fastening assembly member according to claim 3 is the fastening assembly member according to claim 1 or 2, wherein the insertion hole of the second washer has an inner peripheral edge that is uneven in the radial direction. It is characterized by.

請求項４に記載の締結構造体は、雄ねじ部と頭部を有するボルトと、雌ねじ部の一方の開口側に軸対称でかつ断面視略台形状の凹部を有するナットと、ナットの凹部に嵌合するよう軸対称で側面視略台形状に突出形成した突出部を有するとともに、突出部の上部にボルトの雄ねじ部が挿通する挿通孔を有し、しかも挿通孔が突出部の中心位置から偏心している第１のワッシャと、ナットの凹部の内径に略等しい外径で、ボルトの雄ねじ部の外径に略等しい内径の挿通孔を有する弾性材料製の第２のワッシャと、を有してなる締結構造体であって、ナットの凹部に第２のワッシャを嵌着し、ナットの凹部に第１のワッシャの突出部を対向させて、ボルトとナットにより被締結体を介装して螺合締結したとき、ナットの凹部と第１のワッシャの突出部が嵌合し、第１のワッシャの挿通孔がボルトの雄ねじ部と噛み合うことによりその接触部分において第１のワッシャのねじれが生じ、第１のワッシャとボルトの雄ねじ部との非接触部分の隙間を第２のワッシャが弾性変形して埋めることを特徴とする。   According to a fourth aspect of the present invention, there is provided a fastening structure including a bolt having a male screw portion and a head, a nut having an axially symmetric recess having a trapezoidal shape in cross section on one opening side of the female screw portion, and a recess in the nut. A projecting portion that is axially symmetrical and formed in a substantially trapezoidal shape in side view, and has an insertion hole through which the male screw portion of the bolt is inserted, and the insertion hole is offset from the center position of the projecting portion. A first washer having a center, and a second washer made of an elastic material having an outer diameter substantially equal to the inner diameter of the concave portion of the nut and having an inner diameter substantially equal to the outer diameter of the male thread portion of the bolt. A fastening structure having a second washer fitted in the recess of the nut, the projecting portion of the first washer opposed to the recess of the nut, and the bolted body and the nut to be fastened. When the joint is fastened, the protrusion of the recess of the nut and the first washer And the first washer insertion hole meshes with the male threaded portion of the bolt to cause twisting of the first washer at the contact portion, and the non-contact portion between the first washer and the male threaded portion of the bolt The gap is filled with the second washer elastically deformed.

請求項５に記載の締結構造体は、請求項４に記載された締結構造体において、前記ナットの凹部は、第２のワッシャを嵌着する窪み部分を有していることを特徴とする。   The fastening structure according to claim 5 is the fastening structure according to claim 4, wherein the concave portion of the nut has a recessed portion into which the second washer is fitted.

請求項６に記載の締結構造体は、請求項４又は５に記載された締結構造体において、前記第２のワッシャの挿通孔は、その内周縁が径方向に凹凸状にしてあることを特徴とする。   The fastening structure according to claim 6 is the fastening structure according to claim 4 or 5, wherein the insertion hole of the second washer has an inner peripheral edge that is uneven in the radial direction. And

本発明の締結用組部材及びそれを用いた締結構造体によれば、締結状態で第１のワッシャとボルトの雄ねじ部の間で微小振動が生じた場合に、第１のワッシャとボルトの雄ねじ部の接触部分における力を第１のワッシャとボルトの雄ねじ部の非接触部分の隙間を埋める第２のワッシャに分散させることにより緩み止め効果を向上させることが可能になる。   According to the assembly member for fastening and the fastening structure using the same according to the present invention, when micro vibration occurs between the first washer and the male screw portion of the bolt in the fastened state, the first washer and the male screw of the bolt It is possible to improve the loosening prevention effect by dispersing the force at the contact portion of the portion to the second washer that fills the gap between the first washer and the non-contact portion of the male screw portion of the bolt.

以下、本発明を実施するための最良の形態を図面を参照しながら説明する。図１は本発明の実施形態に係る締結用組部材１Ａの要部断面図である。同図には、締結用組部材１Ａとともに用いられるボルト４も記載している。ボルト４は、従来から広く用いられているものであり、雄ねじ部４１と頭部４２からなる。締結用組部材１Ａは、ナット２と、第１のワッシャ３と、第２のワッシャ５と、を有する。ナット２、第１のワッシャ３、ボルト４は、硬度が大きく、金属製（例えば鉄やステンレスなど）である。第１のワッシャ３は、少なくともナット２と同等又はそれ以上の硬度であるのが望ましい。第２のワッシャ５は弾性材料製である。   The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an essential part of a fastening member 1A according to an embodiment of the present invention. The figure also shows bolts 4 used together with the fastening assembly member 1A. The bolt 4 has been widely used conventionally, and includes a male screw portion 41 and a head portion 42. The fastening member 1 </ b> A includes a nut 2, a first washer 3, and a second washer 5. The nut 2, the first washer 3, and the bolt 4 have high hardness and are made of metal (for example, iron or stainless steel). It is desirable that the first washer 3 has a hardness at least equal to or higher than that of the nut 2. The second washer 5 is made of an elastic material.

図２は、ナット２を示すものであり、（ａ）は平面図、（ｂ）はＡ−Ａ断面図、（ｃ）は底面図である。このナット２は、角柱（例えば正六角形の角柱）であり、ボルト４の雄ねじ部４１と噛み合う雌ねじ部２６が形成されている。この雌ねじ部２６の一方の開口側（図２（ｂ）において下方側）には、軸対称でかつ断面視略台形状の凹部２１が下面２８から窪むように形成されている。なお、軸対称とはナット２の中心軸Ｔに関して対称の意である。   2A and 2B show the nut 2, where FIG. 2A is a plan view, FIG. 2B is a cross-sectional view along AA, and FIG. 2C is a bottom view. The nut 2 is a prism (for example, a regular hexagonal prism), and has an internal thread portion 26 that meshes with the external thread portion 41 of the bolt 4. On one opening side (the lower side in FIG. 2B) of the female screw portion 26, a concave portion 21 that is axially symmetric and has a substantially trapezoidal shape in cross section is formed to be recessed from the lower surface 28. Axisymmetric means symmetrical about the central axis T of the nut 2.

この凹部２１は、詳細には、凹部側面２２と凹部上面２３からなる。前述の雌ねじ部２６の開口は、凹部上面２３の中心部に存在することになる。さらに詳細には、凹部側面２２は、傾斜角度が途中で変わっており、傾斜が比較的緩やかな表面側部分（傾斜部分）２２Ａと傾斜が急で垂直か或いはほとんど垂直な奥側部分（窪み部分）２２Ｂを有している。傾斜部分２２Ａの傾斜ｘは、中心軸Ｔに対して約１０度〜約１５度が望ましい。窪み部分２２Ｂは、後述する第２のワッシャ５をナット２に嵌着するための部分であり、第２のワッシャ５が安定して嵌まり込み得る内径と深さを有する。   Specifically, the recess 21 includes a recess side surface 22 and a recess upper surface 23. The opening of the female screw portion 26 described above exists in the center portion of the upper surface 23 of the recess. More specifically, the side surface 22 of the recess has an inclined angle that changes in the middle, and the surface side portion (inclined portion) 22A having a relatively gentle inclination and the back side portion (indented portion) where the inclination is steep and vertical or almost vertical. ) 22B. The inclination x of the inclined portion 22A is preferably about 10 degrees to about 15 degrees with respect to the central axis T. The recessed portion 22B is a portion for fitting a second washer 5 (to be described later) to the nut 2 and has an inner diameter and a depth at which the second washer 5 can be fitted stably.

なお、窪み部分２２Ｂがあると、第２のワッシャ５を安定して凹部上面２３付近に位置させることができるが、窪み部分２２Ｂは傾斜が急なために金型の離型性が一般には良くない。よって、金型の寿命を縮めたり、窪み部分２２Ｂを別に加工したりする必要性が生じることもあるため、窪み部分２２Ｂを省略して傾斜部分２２Ａのみにする場合もある。この場合、後述のように第１のワッシャ３をナット２の凹部２１に嵌め込む際に、同時に第２のワッシャ５も嵌め込むことになる。   In addition, when the recessed portion 22B is present, the second washer 5 can be stably positioned in the vicinity of the upper surface 23 of the recess. However, since the recessed portion 22B has a steep inclination, the mold releasability is generally good. Absent. Therefore, since it may be necessary to shorten the life of the mold or to process the recessed portion 22B separately, the recessed portion 22B may be omitted and only the inclined portion 22A may be provided. In this case, when the first washer 3 is fitted into the recess 21 of the nut 2 as described later, the second washer 5 is also fitted at the same time.

ナット２は、凹部側面２２と下面２８との交点（凹部下部点）２５、凹部側面２２と凹部上面２３の交点（凹部上部点）２４、雌ねじ部２６の内径（最小の径）の円２７は、図２（ｃ）の底面図に示すように、実質的に同心円である。   The nut 2 has a circle 27 of an intersection (concave portion lower point) 25 between the recess side surface 22 and the lower surface 28, an intersection (concave portion upper point) 24 of the recess side surface 22 and the recess upper surface 23, and an inner diameter (minimum diameter) of the female screw portion 26. As shown in the bottom view of FIG. 2C, it is substantially concentric.

図３は、第１のワッシャ３を示すものであり、（ａ）は平面図、（ｂ）はＢ−Ｂ断面図である。この第１のワッシャ３は、ナット２の凹部２１に嵌合するよう軸対称でかつ側面視略台形状に基部３２から突出形成した突出部３１を有するとともに、突出部３１の上部３１ａにボルト４の雄ねじ部４１が挿通する挿通孔３５を有し、しかも挿通孔３５が突出部３１の中心位置から偏心している。突出部３１の側面（突出側面）３６は傾斜しており、突出部３１の上部３１ａの上面（突出上面）３９は傾斜が少ないか又はほとんど傾斜がない。突出部３１の下方に位置する基部３２は、第１のワッシャ３を支持するものであり、若干傾斜しているか或いは平坦でもよく、少なくともその外周縁（支持下部点）３３において被締結体等と接触する。   3A and 3B show the first washer 3, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along the line BB. The first washer 3 has a projecting portion 31 that is axially symmetric so as to fit into the recess 21 of the nut 2 and is formed in a substantially trapezoidal shape in a side view so as to project from the base portion 32, and a bolt 4 on an upper portion 31 a of the projecting portion 31. The male threaded portion 41 has an insertion hole 35 through which the insertion hole 35 is eccentric from the center position of the protruding portion 31. The side surface (projecting side surface) 36 of the projecting portion 31 is inclined, and the upper surface (projecting upper surface) 39 of the upper portion 31a of the projecting portion 31 has little or almost no tilt. The base 32 positioned below the protrusion 31 supports the first washer 3 and may be slightly inclined or flat, and at least the outer periphery (supporting lower point) 33 and the body to be fastened. Contact.

突出側面３６と突出上面３９との交点（突出上部点）３８が描く円の直径は、前述のナット２の凹部上部点２４の直径以下の寸法となっている。また、突出側面３６と基部３２との交点（突出下部点）３４が描く円の直径は、ナット２の凹部下部点２５の直径と等しいかそれ以上の寸法となっている。これらの円の中心位置は、図３に示すＸ−Ｘ軸上のｉ点にあり、このＸ−Ｘ軸は前述した図２におけるナット２の中心軸Ｔと共通である。   The diameter of the circle drawn by the intersection (projecting upper point) 38 between the projecting side surface 36 and the projecting upper surface 39 is smaller than the diameter of the concave upper point 24 of the nut 2 described above. In addition, the diameter of the circle drawn by the intersection (projecting lower point) 34 between the projecting side surface 36 and the base 32 is equal to or larger than the diameter of the recess lower point 25 of the nut 2. The center positions of these circles are at point i on the XX axis shown in FIG. 3, and the XX axis is common to the central axis T of the nut 2 in FIG.

一方、挿通孔３５の周縁３７が描く円の中心位置は、図３に示すＹ−Ｙ軸上のｊ点にある。従って、突出部３１の中心位置ｉ点は図示するＸ−Ｘ軸上にあるので、挿通孔３５の中心位置ｊ点と突出部３１の中心位置ｉ点とは異なっている。すなわち、突出部３１の中心位置ｉ点は、挿通孔３５の中心位置ｊ点に対して偏心している。   On the other hand, the center position of the circle drawn by the peripheral edge 37 of the insertion hole 35 is at point j on the Y-Y axis shown in FIG. Therefore, since the center position i point of the protrusion 31 is on the XX axis shown in the figure, the center position j point of the insertion hole 35 and the center position i point of the protrusion 31 are different. That is, the center position i point of the protrusion 31 is eccentric with respect to the center position j point of the insertion hole 35.

図４は、第２のワッシャ５を示すものであり、（ａ）は平面図、（ｂ）はＣ−Ｃ断面図である。第２のワッシャ５は、締結に際してはナット２と第１のワッシャ３の間に設けられる。第２のワッシャ５は、ナット２の凹部２１の内径に略等しい外径で、ボルト４の雄ねじ部４１の外径（最大の径）に略等しい内径の挿通孔５１を有して平板状をなしている。第２のワッシャ５の外周縁５３と挿通孔５１を形成する内周縁５２とは実質的に同心円である。さらに詳細には、内周縁５２の径（第２のワッシャ５の内径）は、締結時にボルト４の雄ねじ部４１との間に隙間が生じないように、ボルト４の雄ねじ部４１の外径と同じか若干小さいことが望ましい。外周縁５３の径（第２のワッシャ５の外径）は、ナット２の凹部２１の窪み部分２２Ｂに嵌着可能な大きさ（例えば窪み部分２２Ｂの内径の１０％前後）である。厚みは、締結したときにナット２の凹部２１と第１のワッシャ３の突出部３１との接触を阻害しないように、少なくともナット２の凹部２１の深さよりも小さくしている。また、この実施形態では窪み部分２２Ｂの深さより若干大きくしている。また、第２のワッシャ５の下面（第１のワッシャ３側の面）５４は、締結したときにボルト４の雄ねじ部４１と第１のワッシャ３の突出部３１との接触を阻害しないように、平坦（突起がない）であることが望ましい。   4A and 4B show the second washer 5, where FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along the line C-C. The second washer 5 is provided between the nut 2 and the first washer 3 when fastening. The second washer 5 has an insertion hole 51 having an outer diameter substantially equal to the inner diameter of the concave portion 21 of the nut 2 and substantially equal to the outer diameter (maximum diameter) of the male screw portion 41 of the bolt 4. There is no. The outer peripheral edge 53 of the second washer 5 and the inner peripheral edge 52 forming the insertion hole 51 are substantially concentric circles. More specifically, the diameter of the inner peripheral edge 52 (the inner diameter of the second washer 5) is the same as the outer diameter of the male screw portion 41 of the bolt 4 so that no gap is formed between the inner screw 52 and the male screw portion 41 of the bolt 4. It should be the same or slightly smaller. The diameter of the outer peripheral edge 53 (the outer diameter of the second washer 5) is a size that can be fitted into the recessed portion 22B of the recessed portion 21 of the nut 2 (for example, around 10% of the inner diameter of the recessed portion 22B). The thickness is set to be at least smaller than the depth of the recess 21 of the nut 2 so as not to hinder contact between the recess 21 of the nut 2 and the protrusion 31 of the first washer 3 when fastened. In this embodiment, the depth is slightly larger than the depth of the recessed portion 22B. Further, the lower surface (the surface on the first washer 3 side) 54 of the second washer 5 does not hinder the contact between the male thread portion 41 of the bolt 4 and the protruding portion 31 of the first washer 3 when fastened. It is desirable to be flat (no protrusions).

第２のワッシャ５の材質は、ゴム（例えば、耐候性が優れたネオプレーン系のゴム）とするのが望ましいが、シリコンその他合成樹脂等の同様の弾性を有するものであればよい。   The material of the second washer 5 is desirably rubber (for example, neoprene rubber having excellent weather resistance), but may be any material having similar elasticity such as silicon or other synthetic resin.

以上、ナット２、第１のワッシャ３、第２のワッシャ５について説明したが、これらは１組となって締結用組部材１Ａを構成し、市場に提供される。或いは、締結用組部材１Ａを構成することを前提に、各々が単独で市場に提供されることも有り得る。なお、ボルト４は前述のとおり、従来から広く用いられている一般のものであるので、締結用組部材１Ａと一緒又はそれと独立して市場に提供される。   Although the nut 2, the first washer 3, and the second washer 5 have been described above, these constitute a set and constitute a set member for fastening 1A, which is provided to the market. Alternatively, on the assumption that the fastening assembly member 1A is configured, each may be provided to the market alone. Since the bolt 4 is a general one that has been widely used as described above, the bolt 4 is provided to the market together with or independently of the fastening assembly member 1A.

次に、締結用組部材１Ａを用いた締結構造体１Ｂを図５に基づいて説明する。同図は、締結構造体１Ｂの要部断面図であり、（ａ）は締結完了前、（ｂ）は締結完了後のものである。   Next, a fastening structure 1B using the fastening member 1A will be described with reference to FIG. This figure is a cross-sectional view of the main part of the fastening structure 1B, where (a) is before completion of fastening and (b) is after completion of fastening.

図５（ａ）に示すように、ボルト４の頭部４２の上に、雄ねじ部４１を挿通して被締結体６、７、第１のワッシャ３をこの順で置き、窪み部分２２Ｂに第２のワッシャ５を嵌着した状態で、雌ねじ部２６を雄ねじ部４１に螺合させてナット２を回していく。すると、ナット２の凹部下部点２５が第１のワッシャ３の突出側面３６に接触する。   As shown in FIG. 5 (a), the male threaded portion 41 is inserted over the head portion 42 of the bolt 4 to place the fastened bodies 6 and 7 and the first washer 3 in this order, and the second portion is placed in the recessed portion 22B. In a state where the second washer 5 is fitted, the female screw part 26 is screwed into the male screw part 41 and the nut 2 is rotated. Then, the recess lower point 25 of the nut 2 comes into contact with the protruding side surface 36 of the first washer 3.

更に、ナット２を回していくと、第１のワッシャ３の突出側面３６は、ナット２の凹部下部点２５から圧力を受けながら徐々に凹部２１に嵌まり込んでいく。   As the nut 2 is further rotated, the protruding side surface 36 of the first washer 3 gradually fits into the recess 21 while receiving pressure from the recess lower point 25 of the nut 2.

このとき、前述のように、第１のワッシャ３の挿通孔３５の中心位置ｊ点と突出部３１の中心位置ｉ点とは偏心しているため、図５（ｂ）の図面***右側に示されるように、第１のワッシャ３の挿通孔３５の周辺の一部がボルト４の雄ねじ部４１と接触し、大きい硬度のもの同士であるので強く反発し合いながらそのねじ山間に食い込む形になる。   At this time, as described above, the center position j point of the insertion hole 35 of the first washer 3 and the center position i point of the protrusion 31 are decentered, so that they are shown on the center right side of the drawing of FIG. As shown in the figure, a part of the periphery of the insertion hole 35 of the first washer 3 is in contact with the male threaded portion 41 of the bolt 4, and since they are of high hardness, they have a shape that bites between the screw threads while strongly repelling each other. .

また、雄ねじ部４１のねじ山は螺旋状であるため、第１のワッシャ３の挿通孔３５の周辺部分が雄ねじ部４１の螺旋状のねじ山と大きい硬度のもの同士強く反発し合いながら噛み合うことにより、その接触部分付近において第１のワッシャ３に一種のねじれが生じる。   In addition, since the thread of the male screw portion 41 is spiral, the peripheral portion of the insertion hole 35 of the first washer 3 meshes with the spiral thread of the male screw portion 41 while strongly repelling each other. Thus, a kind of twist occurs in the first washer 3 in the vicinity of the contact portion.

また、第１のワッシャ３がボルト４の雄ねじ部４１に接触する面積は極めて小さく、ピンポイントである。その他の第１のワッシャ３とボルト４の雄ねじ部４１の間は、非接触部分であって隙間が生じている。その隙間は、第１のワッシャ３とボルト４の雄ねじ部４１の接触部分の軸対称の反対側（図５（ｂ）の図面***左側）で、最も大きくなっている。   Moreover, the area where the first washer 3 contacts the male thread portion 41 of the bolt 4 is extremely small and is a pinpoint. Between the other 1st washer 3 and the external thread part 41 of the volt | bolt 4, it is a non-contact part and the clearance gap has arisen. The gap is the largest on the opposite side of the axisymmetric side of the contact portion between the first washer 3 and the male thread portion 41 of the bolt 4 (on the left side in the center of the drawing in FIG. 5B).

このボルト４の雄ねじ部４１と第１のワッシャ３の非接触部分の隙間は、図５（ｂ）に示すように、第２のワッシャ５によって埋められる。すなわち、第１のワッシャ３の突出上面３９は、ナット２の凹部下部点２５が第１のワッシャ３の突出側面３６に接触するときと前後して、第２のワッシャ５に接触する。第２のワッシャ５は、第１のワッシャ３の突出部３１がナット２の凹部２１に嵌まり込むにつれて弾性変形し、ボルト４の雄ねじ部４１と第１のワッシャ３の非接触部分の隙間に突出して隙間を埋めることになる。   The gap between the male screw portion 41 of the bolt 4 and the non-contact portion between the first washer 3 is filled with the second washer 5 as shown in FIG. That is, the projecting upper surface 39 of the first washer 3 contacts the second washer 5 before and after the recess lower point 25 of the nut 2 contacts the projecting side surface 36 of the first washer 3. The second washer 5 is elastically deformed as the protruding portion 31 of the first washer 3 is fitted into the recess 21 of the nut 2, and is formed in the gap between the male screw portion 41 of the bolt 4 and the non-contact portion of the first washer 3. It will protrude and fill the gap.

こうして、以下に述べる効果が生じる。   Thus, the following effects are produced.

第１のワッシャ３が同じく大きい硬度のものであるボルト４の雄ねじ部４１に小面積で接触し、強く反発し合いながら食い込むことで、いわゆるくさび効果が生じ、第１のワッシャ３とボルト４の雄ねじ部４１間の位置関係が固定化される。なお、第１のワッシャ３の肉厚がボルト４の雄ねじ部４１のねじ山のピッチよりも小さい方が第１のワッシャ３がねじ山に食い込みやすくなる。また、第１のワッシャ３がボルト４の雄ねじ部４１に強く反発し合ってねじれながら噛み合っている。よって、第１のワッシャ３とボルト４の雄ねじ部４１の接触部分において集中的な横方向の力がかかり（第１のワッシャ３とボルト４が互いに押し付けあい）、強力な緩み止め効果が得られる。更には、第１のワッシャ３とボルト４の雄ねじ部４１の接触部分における力が中心軸（ナット２の中心軸Ｔ）に対して反対側のボルト４の雄ねじ部４１とナット２の接触部分に伝達され、そこにも集中的な横方向の力がかかる。よって、その箇所においてボルト４とナット２が互いに押し付けあい、強力な緩み止め効果が得られる。   The first washer 3 has a small hardness in contact with the male thread 41 of the bolt 4, which is also of a high hardness, and it bites while strongly repelling, so that a so-called wedge effect occurs, and the first washer 3 and the bolt 4 The positional relationship between the male screw portions 41 is fixed. Note that the first washer 3 is likely to bite into the thread when the thickness of the first washer 3 is smaller than the pitch of the thread of the male thread portion 41 of the bolt 4. Further, the first washer 3 is engaged with the male threaded portion 41 of the bolt 4 while being strongly repelled and twisted. Therefore, a concentrated lateral force is applied at the contact portion between the first washer 3 and the male threaded portion 41 of the bolt 4 (the first washer 3 and the bolt 4 are pressed against each other), and a strong loosening prevention effect is obtained. . Furthermore, the force at the contact portion between the first washer 3 and the male threaded portion 41 of the bolt 4 is applied to the contact portion between the male threaded portion 41 of the bolt 4 and the nut 2 opposite to the central axis (the central axis T of the nut 2). It is transmitted, and there is also a concentrated lateral force. Therefore, the bolt 4 and the nut 2 are pressed against each other at that location, and a strong locking prevention effect is obtained.

一方、第２のワッシャ５が変形してボルト４の雄ねじ部４１と第１のワッシャ３の非接触部分の隙間を埋めると、締結状態で第１のワッシャ３とボルト４の雄ねじ部４１の間で微小振動が生じた場合、第１のワッシャ３とボルト４の雄ねじ部４１は大きい硬度のもの同士であるのでその接触部分では強く反発し合う力が働くが、その力を第１のワッシャ３とボルト４の雄ねじ部４１の非接触部分の隙間を埋めた弾性材料製の第２のワッシャ５に分散させることができる。その結果、微小振動による緩みを抑制することが可能になる。そのためには、第２のワッシャ５は、弾性変形して、望ましくは少なくとも第１のワッシャ３の厚みの半分以上、更に望ましくは厚み以上にボルト４の雄ねじ部４１と第１のワッシャ３の非接触部分の隙間を埋める。   On the other hand, when the second washer 5 is deformed to fill the gap between the male screw portion 41 of the bolt 4 and the non-contact portion of the first washer 3, the space between the first washer 3 and the male screw portion 41 of the bolt 4 is fastened. When micro vibrations occur, the first washer 3 and the male threaded portion 41 of the bolt 4 are of high hardness. Therefore, a strong repulsive force acts at the contact portion, but the force is applied to the first washer 3. And the second washer 5 made of an elastic material that fills the gap between the non-contact portions of the male screw portion 41 of the bolt 4. As a result, it is possible to suppress loosening due to minute vibrations. For this purpose, the second washer 5 is elastically deformed, preferably at least half the thickness of the first washer 3, and more preferably more than the thickness of the male thread portion 41 of the bolt 4 and the first washer 3. Fill gaps in contact areas.

表１は、締結構造体１Ｂについて過度の条件下で実施した緩み止めの耐久試験の結果を表したものである。この試験では、図６に示すように、保持部材８の細長い孔８１に締結構造体１Ｂを係合して保持する。締結構造体１Ｂは、孔８１に沿って横方向（ボルト４の中心軸に対して垂直方向）に最大距離１９ｍｍ移動できる。この試験は、ＮＡＳ規格の振動試験の１つであり、保持部材８を横方向に振動させて締結構造体１Ｂに衝撃を与え、その結果緩みが生じるか否かをテストするものである。ボルト４はＪＩＳ規格の強度区分１０．８Ｔの一般のものを使用し、締め付けトルクは２００ｋｇ・ｆ／ｃｍ、振動周波数は２９．７Ｈｚ（１７８０ｒｐｍ）、振動復振幅は１１ｍｍ、振動時間は１７分（振動回数は約３万回連続）とした。そうすると、締結構造体１Ｂにおける最大の加速度は約３９Ｇとなる。また、ねじ山には油を塗布した。   Table 1 shows the results of a durability test of the loosening prevention performed on the fastening structure 1B under excessive conditions. In this test, as shown in FIG. 6, the fastening structure 1 </ b> B is engaged and held in the elongated hole 81 of the holding member 8. The fastening structure 1B can move a maximum distance of 19 mm in the lateral direction (perpendicular to the central axis of the bolt 4) along the hole 81. This test is one of NAS standard vibration tests, in which the holding member 8 is vibrated in the lateral direction to give an impact to the fastening structure 1B, and as a result, whether or not loosening occurs is tested. Bolt 4 uses a JIS standard strength category of 10.8T, tightening torque is 200kg · f / cm, vibration frequency is 29.7Hz (1780rpm), vibration return amplitude is 11mm, vibration time is 17 minutes ( The number of vibrations was approximately 30,000 times). Then, the maximum acceleration in the fastening structure 1B is about 39G. In addition, oil was applied to the threads.

Figure 2007211892
Figure 2007211892

結果として、締結構造体１において第２のワッシャ５がないものは、２回の試験のうち両方とも緩みが見られたが、第２のワッシャ５があるものは、２回の試験のうち両方において緩みは見られなかった。   As a result, in the fastening structure 1 where the second washer 5 was not present, both of the two tests were loosened, but the one having the second washer 5 was both of the two tests. No loosening was observed in

なお、締結構造体１Ｂでは、変形した第２のワッシャ５を介して第１のワッシャ３とボルト４の雄ねじ部４１の間に互いを押し付け合うある程度の力が広い面積で生じる。このため、第１のワッシャ３とボルト４の雄ねじ部４１の間に極端に大きな振動が加わったために仮に第１のワッシャ３とボルト４の雄ねじ部４１の接触の位置が多少ずれて緩みが生じた場合でも、第１のワッシャ３がボルト４の雄ねじ部４１から外れるのが抑止される。その結果、締結構造体１Ｂでは、被締結体から第１のワッシャ３及びナット２が脱落することも抑制することができる。   In the fastening structure 1 </ b> B, a certain amount of force is generated over a wide area between the first washer 3 and the male screw portion 41 of the bolt 4 via the deformed second washer 5. For this reason, since extremely large vibration is applied between the first washer 3 and the male threaded portion 41 of the bolt 4, the position of the contact between the first washer 3 and the male threaded portion 41 of the bolt 4 is somewhat shifted and loosened. Even in this case, the first washer 3 is prevented from coming off from the male thread portion 41 of the bolt 4. As a result, in the fastening structure 1B, it is possible to suppress the first washer 3 and the nut 2 from dropping from the fastened body.

次に、第２のワッシャの変形例を説明する。図７は、その第２のワッシャ９の平面図である。この第２のワッシャ９は、先の例とは挿通孔を形成する内周縁の形状が異なっている。すなわち、第２のワッシャ９の挿通孔９１の内周縁９２は径方向に凹凸状にしてある。それ以外の構成は、第２のワッシャ５と同様である。   Next, a modified example of the second washer will be described. FIG. 7 is a plan view of the second washer 9. The second washer 9 is different from the previous example in the shape of the inner peripheral edge forming the insertion hole. That is, the inner peripheral edge 92 of the insertion hole 91 of the second washer 9 is uneven in the radial direction. Other configurations are the same as those of the second washer 5.

この第２のワッシャ９は、内周縁９２が径方向に凹凸状であることにより、内周縁９２の領域は変形し易くなり、ボルト４の雄ねじ部４１と第１のワッシャ３の非接触部分の隙間を更に効率的に埋めることができる。また、ボルト４の雄ねじ部４１を挿通孔９１に挿通する際に、内周縁９２の最小の径がボルト４の雄ねじ部４１の外径よりも小さくても挿通し易くなる。   In the second washer 9, since the inner peripheral edge 92 is uneven in the radial direction, the region of the inner peripheral edge 92 is easily deformed, and the male screw portion 41 of the bolt 4 and the non-contact portion of the first washer 3 The gap can be filled more efficiently. Further, when the male screw portion 41 of the bolt 4 is inserted into the insertion hole 91, it is easy to insert even if the minimum diameter of the inner peripheral edge 92 is smaller than the outer diameter of the male screw portion 41 of the bolt 4.

以上、本発明の望ましい実施形態に係る締結構造体について説明したが、本発明は、実施形態に記載したものに限られることなく、特許請求の範囲に記載した事項の範囲内でのさまざまな設計変更が可能である。例えば、第１のワッシャ３を硬度が大きく耐ねじれ性を有するプラスチック製（例えばガラス繊維を含んだ強化プラスチック製）とすることも可能である。また、実施形態に記載したナット２の凹部２１、第１のワッシャ３の突出部３１、第２のワッシャ５、の大きさや細かな形状などは、それらが用いられる環境や被締結物に合わせて任意に変更可能である。   The fastening structure according to the preferred embodiment of the present invention has been described above. However, the present invention is not limited to that described in the embodiment, and various designs within the scope of the matters described in the claims. It can be changed. For example, the first washer 3 may be made of a plastic having high hardness and twist resistance (for example, made of reinforced plastic containing glass fiber). In addition, the size and fine shape of the concave portion 21 of the nut 2, the protruding portion 31 of the first washer 3, and the second washer 5 described in the embodiment are adapted to the environment in which they are used and the object to be fastened. It can be changed arbitrarily.

本発明の実施形態に係る締結用組部材の要部断面図である。It is principal part sectional drawing of the assembly member for fastening which concerns on embodiment of this invention. 同上の締結用組部材のナットを示すもので、（ａ）は平面図、（ｂ）はＡ−Ａ断面図、（ｃ）は底面図である。The nut of the assembly member for a fastening same as the above is shown, (a) is a top view, (b) is AA sectional drawing, (c) is a bottom view. 同上の締結用組部材の第１のワッシャを示すもので、（ａ）は平面図、（ｂ）はＢ−Ｂ断面図である。The 1st washer of the assembly member for fastening same as the above is shown, (a) is a top view and (b) is a BB sectional view. 同上の締結用組部材の第２のワッシャを示すもので、（ａ）は平面図、（ｂ）はＣ−Ｃ断面図である。The 2nd washer of the assembly member for fastening same as the above is shown, (a) is a top view and (b) is a CC sectional view. 同上の締結構造体の要部断面図であり、（ａ）は締結完了前、（ｂ）は締結完了後のものを示す。It is principal part sectional drawing of a fastening structure same as the above, (a) is before completion of fastening, (b) shows the thing after completion of fastening. 同上の締結構造体の試験を示す要部断面図である。It is principal part sectional drawing which shows the test of the fastening structure same as the above. 同上の締結用組部材の別の第２のワッシャの平面図である。It is a top view of another 2nd washer of the assembly member for fastening same as the above. 従来の締結構造体の要部断面図である。It is principal part sectional drawing of the conventional fastening structure.

符号の説明Explanation of symbols

１Ａ 締結用組部材
１Ｂ 締結構造体
２ ナット
３ 第１のワッシャ
４ ボルト
５、９ 第２のワッシャ
２１ ナットの凹部
２２Ｂ ナットの凹部の窪み部分
２６ ナットの雌ねじ部
３１ 第１のワッシャの突出部
３５ 第１のワッシャの挿通孔
４１ ボルトの雄ねじ部
５１、９１ 第２のワッシャの挿通孔
1A Assembly member for fastening
1B Fastening structure
2 nuts
3 First washer
4 Bolt 5, 9 Second washer 21 Nut recess 22B Nut recess recess 26 Nut female thread 31 First washer projection 35 First washer insertion hole 41 Bolt male thread 51, 91 1st 2 washer insertion hole

Claims (6)

雌ねじ部の一方の開口側に軸対称でかつ断面視略台形状の凹部を有するナットと、
ナットの凹部に嵌合するよう軸対称でかつ側面視略台形状に突出形成した突出部を有するとともに、突出部の上部にボルトの雄ねじ部が挿通する挿通孔を有し、しかも挿通孔が突出部の中心位置から偏心している第１のワッシャと、
ナットの凹部の内径に略等しい外径で、ボルトの雄ねじ部の外径に略等しい内径の挿通孔を有する弾性材料製の第２のワッシャと、を有してなり、ボルトとともに用いられる締結用組部材であって、
ナットの凹部に第２のワッシャを嵌着し、ナットの凹部に第１のワッシャの突出部を対向させて、ボルトとナットにより被締結体を介装して螺合締結したとき、ナットの凹部と第１のワッシャの突出部が嵌合し、第１のワッシャの挿通孔がボルトの雄ねじ部と噛み合うことによりその接触部分において第１のワッシャのねじれが生じ、第１のワッシャとボルトの雄ねじ部との非接触部分の隙間を第２のワッシャが弾性変形して埋めることを特徴とする締結用組部材。 A nut having an axially symmetric and substantially trapezoidal concave portion on one opening side of the female screw portion;
It has a projecting part that is axially symmetric and fits into the recess of the nut and protrudes in a substantially trapezoidal shape when viewed from the side, and has an insertion hole through which the male threaded part of the bolt is inserted, and the insertion hole projects A first washer eccentric from the center position of the section;
A second washer made of an elastic material having an outer diameter substantially equal to the inner diameter of the concave portion of the nut and having an inner diameter substantially equal to the outer diameter of the male screw portion of the bolt, and used for fastening together with the bolt An assembly member,
When the second washer is fitted into the recess of the nut, the protruding portion of the first washer is opposed to the recess of the nut, and the bolted and nut are screwed and fastened together, the nut recess And the projection of the first washer are fitted, and the insertion hole of the first washer meshes with the male screw portion of the bolt, whereby the first washer twists at the contact portion, and the first washer and the male screw of the bolt A fastening assembly member characterized in that the second washer is elastically deformed to fill a gap in a non-contact portion with the portion. 請求項１に記載された締結用組部材において、
前記ナットの凹部は、第２のワッシャを嵌着する窪み部分を有していることを特徴とする締結用組部材。 In the assembly member for fastening described in claim 1,
A fastening assembly member, wherein the recess of the nut has a recessed portion into which the second washer is fitted. 請求項１又は２に記載された締結用組部材において、
前記第２のワッシャの挿通孔は、その内周縁が径方向に凹凸状にしてあることを特徴とする締結用組部材。 In the assembly member for fastening described in claim 1 or 2,
An assembly member for fastening, wherein the insertion hole of the second washer has an inner peripheral edge that is uneven in the radial direction. 雄ねじ部と頭部を有するボルトと、
雌ねじ部の一方の開口側に軸対称でかつ断面視略台形状の凹部を有するナットと、
ナットの凹部に嵌合するよう軸対称で側面視略台形状に突出形成した突出部を有するとともに、突出部の上部にボルトの雄ねじ部が挿通する挿通孔を有し、しかも挿通孔が突出部の中心位置から偏心している第１のワッシャと、
ナットの凹部の内径に略等しい外径で、ボルトの雄ねじ部の外径に略等しい内径の挿通孔を有する弾性材料製の第２のワッシャと、を有してなる締結構造体であって、
ナットの凹部に第２のワッシャを嵌着し、ナットの凹部に第１のワッシャの突出部を対向させて、ボルトとナットにより被締結体を介装して螺合締結したとき、ナットの凹部と第１のワッシャの突出部が嵌合し、第１のワッシャの挿通孔がボルトの雄ねじ部と噛み合うことによりその接触部分において第１のワッシャのねじれが生じ、第１のワッシャとボルトの雄ねじ部との非接触部分の隙間を第２のワッシャが弾性変形して埋めることを特徴とする締結構造体。 A bolt having a male thread and a head;
A nut having an axially symmetric and substantially trapezoidal concave portion on one opening side of the female screw portion;
It has a projecting part that is axially symmetric and protrudes in a trapezoidal shape in side view so as to fit into the concave part of the nut, and has an insertion hole through which the male screw part of the bolt is inserted, and the insertion hole is a projecting part A first washer eccentric from the center position of
A second washer made of an elastic material having an insertion hole with an outer diameter substantially equal to the inner diameter of the concave portion of the nut and an inner diameter substantially equal to the outer diameter of the male thread portion of the bolt,
When the second washer is fitted into the recess of the nut, the projecting portion of the first washer is opposed to the recess of the nut, and the bolted and nut are screwed and fastened together, the nut recess And the projection of the first washer are fitted, and the insertion hole of the first washer meshes with the male screw portion of the bolt, whereby the first washer twists at the contact portion, and the first washer and the male screw of the bolt The fastening structure is characterized in that the second washer is elastically deformed to fill a gap in a non-contact portion with the portion. 請求項４に記載された締結構造体において、
前記ナットの凹部は、第２のワッシャを嵌着する窪み部分を有していることを特徴とする締結構造体。 The fastening structure according to claim 4,
The recess of the nut has a recessed portion for fitting the second washer. 請求項４又は５に記載された締結構造体において、
前記第２のワッシャの挿通孔は、その内周縁が径方向に凹凸状にしてあることを特徴とする締結構造体。
In the fastening structure according to claim 4 or 5,
The insertion structure of the second washer has an inner peripheral edge that is uneven in the radial direction.
JP2006032569A 2006-02-09 2006-02-09 Fastening structure Expired - Fee Related JP4822865B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009185845A (en) * 2008-02-04 2009-08-20 Teruo Nakagami Fastening member
JP2009264522A (en) * 2008-04-28 2009-11-12 Teruo Nakagami Clip nut
JP4710089B1 (en) * 2010-06-03 2011-06-29 イイファス株式会社 Locking washer and locking fastener using the same
CN103277392A (en) * 2013-06-13 2013-09-04 魏民 Eccentric type self-locking nut
JP2013213523A (en) * 2012-03-30 2013-10-17 Wedgico Co Ltd Fastening structure and fastening method
JP5734495B1 (en) * 2014-07-31 2015-06-17 有限会社ウェジコ Fastening structure
JP2017503942A (en) * 2014-01-24 2017-02-02 ▲謝▼英俊 Three-dimensional lightweight steel frame formed by bidirectional continuous double beams
KR101861559B1 (en) * 2015-04-06 2018-05-29 주식회사 창공주차산업 Washer for preventing untightening of nut or bolt
JP2019157897A (en) * 2018-03-07 2019-09-19 コベルコ建機株式会社 Looseness prevention nut and fastening structure for bolt and nut

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JP2009185845A (en) * 2008-02-04 2009-08-20 Teruo Nakagami Fastening member
JP2009264522A (en) * 2008-04-28 2009-11-12 Teruo Nakagami Clip nut
JP4710089B1 (en) * 2010-06-03 2011-06-29 イイファス株式会社 Locking washer and locking fastener using the same
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JP5734495B1 (en) * 2014-07-31 2015-06-17 有限会社ウェジコ Fastening structure
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