JP2014105797A - Reverse rotation preventive structure of screw body - Google Patents

Reverse rotation preventive structure of screw body Download PDF

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JP2014105797A
JP2014105797A JP2012259829A JP2012259829A JP2014105797A JP 2014105797 A JP2014105797 A JP 2014105797A JP 2012259829 A JP2012259829 A JP 2012259829A JP 2012259829 A JP2012259829 A JP 2012259829A JP 2014105797 A JP2014105797 A JP 2014105797A
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screw
receiving
washer
reverse rotation
unevenness
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JP5336644B1 (en
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Yutaka Michiwaki
裕 道脇
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Next Innovation合同会社
Next Innovation Combination Company
Nejilaw Inc
株式会社NejiLaw
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Abstract

PROBLEM TO BE SOLVED: To provide a reverse rotation preventive structure of a screw body which reliably prevents rotation in a specified direction of the screw body with a simple structure.SOLUTION: A reverse rotation preventive structure includes a male screw body 10, a washer 50 and a member 80 to be fastened, a screw body side seating part 22 is formed on the male screw body 10, a first reception part 60 and a second reception part 70 are formed on the washer 50 side, and a member side seating part 82 is formed on the member 80 to be fastened. A first engagement mechanism A is formed between the first reception 60 and the screw body side seating part 22, when at least the screw body side seating part 22 starts to rotate in the direction of relaxing the male screw body 10 in the fastened state, the first reception part 60 and the screw body side seating part 22 are engaged with each other to prevent relative rotation of them, a second engagement mechanism B is formed between the member side seating part 82 and the second reception part 70 and, when at least the washer 50 starts to rotate in the direction of relaxing the washer 50, the first reception part 70 and the member side seating part 82 are engaged with each other to prevent relative rotation of them and relaxation of the male screw body 10 and the member 80 to be fastened is prevented by the action of the first engagement mechanism A and the second engagement mechanism B.

Description

本発明は、締結したねじ体の逆回転を防止する逆回転防止構造に関する。   The present invention relates to a reverse rotation prevention structure for preventing reverse rotation of a fastened screw body.
従来、様々な場面で、被締結物を締結するためにねじ体が用いられている。このねじ体は、柱状の外周に螺線状の溝が形成される雄ねじ体と、筒部材の内周に螺線状の溝が形成される雌ねじ体を螺合させる構造となっている。   Conventionally, in various scenes, a screw body is used to fasten an object to be fastened. This screw body has a structure in which a male screw body in which a spiral groove is formed on a columnar outer periphery and a female screw body in which a spiral groove is formed on the inner periphery of a cylindrical member are screwed together.
使用時は、被締結部材に形成される孔に雄ねじ体を挿入してから、雌ねじ体を螺合させる。結果、雄ねじ体の頭部と雌ねじ体の筒部材によって被締結物が挟み込まれる。このような締結用のねじ体を簡便に使用出来るように工夫されたものとしては、雄ねじ体の一端に六角柱状の頭部を形成して成る所謂ボルトと、外周面が六角形柱状に形成されるナットの組み合わせから成るものがある。他にも、頭部が六角形状ではなく、端面にすり割り(マイナス穴)や十字穴(プラス穴)が形成された、いわゆる小ねじなども広く用いられている。   At the time of use, after inserting a male screw body into the hole formed in a to-be-fastened member, a female screw body is screwed together. As a result, the fastened object is sandwiched between the head of the male screw body and the cylindrical member of the female screw body. What is devised so that such a screw body for fastening can be used easily is a so-called bolt formed by forming a hexagonal column head at one end of the male screw member, and an outer peripheral surface formed in a hexagonal column shape. There are some combinations of nuts. In addition, a so-called small screw having a head portion that is not hexagonal and has a slit (minus hole) or a cross hole (plus hole) formed on the end face is also widely used.
また、ねじ体の締結時に、雄ねじ体の周囲にワッシャ(座金)を挿入することが行われている。このワッシャは、締結時に被締結物を座屈や傷等から護ったり、逆に、被締結物に積極的に押し当てることによって、ねじ体の緩みを抑制したりする。   In addition, a washer (washer) is inserted around the male screw body when the screw body is fastened. This washer protects the object to be fastened from buckling or scratches at the time of fastening, and conversely suppresses loosening of the screw body by positively pressing the object to be fastened.
例えば、ワッシャには、一般的なリング形状の「平ワッシャ」の他、内周や外周に半径方向に延びる突起を有し、被締結部材やねじ体と係合して緩みを防止する「舌付きワッシャ」、軸方向に折れ曲がった短い爪が被締結物と係合する「爪付きワッシャ」、弾性変形によってねじ体の緩みを防止する「ばねワッシャ」、締結面に食い込ませるための歯を周囲に備えた「歯付きワッシャ」などが存在する。   For example, the washer has a general ring-shaped “flat washer” and a protrusion extending in the radial direction on the inner periphery and outer periphery, and is engaged with a member to be fastened or a screw body to prevent loosening. `` Washer with hook '', `` Washer with claw '' in which short claws bent in the axial direction engage with the object to be fastened, `` Spring washer '' to prevent loosening of the screw body by elastic deformation, teeth around the fastening surface There is a “toothed washer” and so on.
しかしながら、従来のワッシャは、ねじ体との間の緩み防止構造に関して、摩擦や食い込みを期待する程度であるため、よく知られている通りその効果は不十分なものであった。従って、振動等が激しい環境では、ワッシャを用いたとしても、ねじ体が徐々に緩んでしまうという問題があった。   However, the conventional washer has a degree of expectation of friction and biting with respect to the structure for preventing loosening between the screw body, and the effect thereof is insufficient as well known. Therefore, in an environment where vibrations and the like are severe, there is a problem that even if a washer is used, the screw body gradually loosens.
本発明は、上記問題点に鑑みて本発明者の鋭意研究により成されたものであり、ワッシャを有効活用することによって、簡易な構造によって、高度にねじ体の逆回転防止、即ち、緩み止めを行うねじ体の緩み防止構造を提供することを目的とする。   The present invention has been made by the inventor's diligent research in view of the above-mentioned problems, and by using a washer effectively, it has a simple structure and highly prevents reverse rotation of the screw body, that is, prevents loosening. It is an object of the present invention to provide a structure for preventing looseness of a screw body that performs the above.
即ち、上記目的を達成する本発明は、ねじ山を有するねじ体と、ワッシャと、前記ねじ体及びワッシャによって締結される被締結部材を有し、前記ねじ体は、前記ワッシャと対向するねじ体側座部を有して成り、前記ワッシャは、前記ねじ体側座部と対向する第一受部及び前記被締結部材と対向する第二受部を有して成り、前記被締結部材は、前記第二受部と対向する部材側座部を有して成り、前記ねじ体側座部と前記第一受部の間には、前記ねじ体側座部に対して緩み方向の回転力が作用しても互いに係合する状態が保持される第一係合機構が構成され、前記部材側座部と前記第二受部の間には、前記ワッシャに対して前記緩み方向の回転力が作用しても互いに係合する状態が保持される第二係合機構が構成され、締結状体の前記ねじ体を特定方向、即ち、逆回転させること、例えば、前記ねじ体を緩める方向へ回転させることを防止することを特徴とするねじ体の逆回転防止構造である。   That is, the present invention for achieving the above object has a screw body having a screw thread, a washer, and a screwed member fastened by the screw body and the washer, and the screw body is on the screw body side facing the washer. The washer includes a first receiving part facing the screw body side seat part and a second receiving part facing the fastened member, and the fastened member includes the first fastened part. Even if a rotational force in the loosening direction acts on the screw body side seat portion between the screw body side seat portion and the first receiving portion, the member side seat portion is opposed to the second receiving portion. A first engagement mechanism that maintains a state of being engaged with each other is configured, and a rotational force in the loosening direction acts on the washer between the member side seat portion and the second receiving portion. A second engagement mechanism that maintains a state of being engaged with each other is configured, and the screw body of the fastening body is Directed, ie, causing reverse rotation, for example, a reverse rotation preventing structure of the screw body, characterized in that to prevent the rotating direction of loosening the screw member.
上記ねじ体の逆回転防止構造に関連して、前記第一係合機構は、前記ねじ体側座部にねじ体側凹凸が形成され、且つ、前記第一受部に前記ねじ体側凹凸と係合する第一受部側凹凸が形成され、前記係合状態を得ることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first engagement mechanism includes a screw body side uneven portion formed on the screw body side seat portion and an engagement with the screw body side uneven portion on the first receiving portion. A first receiving portion side unevenness is formed to obtain the engagement state.
上記ねじ体の逆回転防止構造に関連して、前記ねじ体側凹凸は、周方向に設けられる鋸刃形状であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the screw body side unevenness is a saw blade shape provided in the circumferential direction.
上記ねじ体の逆回転防止構造に関連して、前記ねじ体側凹凸は、周方向に設けられる山形又は波型形状であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the screw body side unevenness is a mountain shape or a wave shape provided in the circumferential direction.
上記ねじ体の逆回転防止構造に関連して、前記ねじ体側凹凸は、エンボス形状であることを特徴とする。     In relation to the reverse rotation prevention structure of the screw body, the screw body side unevenness is an embossed shape.
上記ねじ体の逆回転防止構造に関連して、前記ねじ体側凹凸は、渦巻き形状の溝又は山であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the screw body side unevenness is a spiral groove or mountain.
上記ねじ体の逆回転防止構造に関連して、前記第一受部側凹凸は、周方向に設けられる鋸刃形状であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first receiving portion side unevenness is a saw blade shape provided in the circumferential direction.
上記ねじ体の逆回転防止構造に関連して、前記第一受部側凹凸は、周方向に設けられる山形又は波型形状であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first receiving-side unevenness is a mountain shape or a wave shape provided in the circumferential direction.
上記ねじ体の逆回転防止構造に関連して、前記第一受部側凹凸は、エンボス形状であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first receiving-side unevenness is an embossed shape.
上記ねじ体の逆回転防止構造に関連して、前記第一受部側凹凸は、渦巻き形状の溝又は山であることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first receiving side unevenness is a spiral groove or mountain.
上記ねじ体の逆回転防止構造に関連して、前記ねじ体側座部には、半径方向に傾斜するねじ体側テーパ面が形成されることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the screw body side seat portion is formed with a screw body side tapered surface inclined in the radial direction.
上記ねじ体の逆回転防止構造に関連して、前記第一受部には、半径方向に傾斜するワッシャ側テーパ面が形成されることを特徴とする。   In relation to the reverse rotation preventing structure of the screw body, the first receiving portion is formed with a washer-side tapered surface inclined in the radial direction.
上記ねじ体の逆回転防止構造に関連して、前記第一係合機構は、前記ねじ体側座部と前記第一受部の距離が縮む程、前記緩み方向の係合強度が高まるように構成されることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first engagement mechanism is configured such that the engagement strength in the loosening direction increases as the distance between the screw body side seat portion and the first receiving portion decreases. It is characterized by being.
上記ねじ体の逆回転防止構造に関連して、前記第一係合機構は、前記ねじ体側座部と前記第一受部の間で、前記ねじ体側座部の締め方向の相対回転を許容することを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the first engagement mechanism allows relative rotation in the tightening direction of the screw body side seat portion between the screw body side seat portion and the first receiving portion. It is characterized by that.
上記ねじ体の逆回転防止構造に関連して、前記ワッシャは、ねじ体の軸方向に弾性変形可能であることを特徴とする。   In connection with the reverse rotation prevention structure of the screw body, the washer is elastically deformable in the axial direction of the screw body.
上記ねじ体の逆回転防止構造に関連して、前記部材側座部は、前記第二受部を収容し得る収容凹部を備えることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the member side seat portion includes an accommodation recess capable of accommodating the second receiving portion.
上記ねじ体の逆回転防止構造に関連して、前記第二係合機構は、前記第二受部と前記収容凹部が嵌り合うことで前記係合状態を得ることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the second engagement mechanism obtains the engagement state by fitting the second receiving portion and the receiving recess.
上記ねじ体の逆回転防止構造に関連して、前記収容凹部の内壁は、前記ねじ体の軸からの距離が周方向に沿って変動すると共に、前記第二受部の外壁は、前記ねじ体の軸からの距離が周方向に沿って変動することを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the inner wall of the housing recess varies in the distance from the axis of the screw body along the circumferential direction, and the outer wall of the second receiving portion is the screw body. The distance from the axis of fluctuates along the circumferential direction.
上記ねじ体の逆回転防止構造に関連して、前記収容凹部の内壁及び前記第二受部の外壁が、前記ねじ体の軸に対して偏心した円形状であることを特徴とする。   In relation to the structure for preventing reverse rotation of the screw body, the inner wall of the housing recess and the outer wall of the second receiving portion have a circular shape eccentric with respect to the axis of the screw body.
上記ねじ体の逆回転防止構造に関連して、前記部材側座部は、前記ねじ体の軸方向に段設された部材側段部を有し、前記第二受部には前記部材側段部と係合するワッシャ側段部が形成されることを特徴とする。   In relation to the reverse rotation prevention structure of the screw body, the member side seat portion has a member side step portion stepped in the axial direction of the screw body, and the second receiving portion includes the member side step portion. A washer-side step portion that engages with the portion is formed.
本発明によれば、簡単な構造でありながらも、ねじ体の逆回転防止、例えば、ねじ体を緩ませる方向の回転を防止することでねじ体の緩み止めを確実に行う事が出来るようになる。   According to the present invention, the screw body can be reliably prevented from loosening by preventing the screw body from rotating backward, for example, by preventing the screw body from rotating in the direction in which the screw body is loosened. Become.
本発明の第一実施形態のねじ体の逆回転防止構造を示す側面部分断面図である。It is a side surface fragmentary sectional view which shows the reverse rotation prevention structure of the screw body of 1st embodiment of this invention. 同逆回転防止構造で用いられる雄ねじ体の側面部分断面図及び底面図である。It is the side surface fragmentary sectional view and bottom view of the external thread body used with the reverse rotation prevention structure. 同逆回転防止構造で用いられるワッシャの上面図及び側面部分断面図である。It is the top view and side surface fragmentary sectional view of a washer used with the reverse rotation prevention structure. (A)は同ねじ体の逆回転防止構造の鋸刃の作用を示す概念図であり、(B)〜(D)は鋸刃の変形例を示す概念図である。(A) is a conceptual diagram which shows the effect | action of the saw blade of the reverse rotation prevention structure of the screw body, (B)-(D) is a conceptual diagram which shows the modification of a saw blade. (A)〜(C)は、同逆回転防止構造の鋸刃の変形例を示す概念図である。(A)-(C) are the conceptual diagrams which show the modification of the saw blade of the reverse rotation prevention structure. (A)(B)は同逆回転防止構造の雄ねじ体の応用例を締めず側面図である。(A) (B) is a side view, without tightening the application example of the external thread body of the reverse rotation prevention structure. (A)(B)は同逆回転防止構造の応用例で用いられるワッシャの上面図及び側面部分断面図である。(A) and (B) are the top views and side surface fragmentary sectional views of the washer used by the application example of the reverse rotation prevention structure. 第二実施形態に係るねじ体の逆回転防止構造の締結状態を示す上面図及び側面部分断面図である。It is the top view and side surface fragmentary sectional view which show the fastening state of the reverse rotation prevention structure of the screw body which concerns on 2nd embodiment. (A)は同逆回転防止構造で用いられるワッシャの上面図及び側面部分断面図であり、(B)は同逆回転防止構造の開放作業を示す側面部分断面図である。(A) is the top view and side surface fragmentary sectional view of a washer used by the reverse rotation prevention structure, (B) is a side surface fragmentary sectional view which shows the open | release operation | work of the reverse rotation prevention structure. (A)は同逆回転防止構造の応用例で用いられるワッシャの開放作業を示す側面部分断面図であり、(B)は同応用例で用いられるワッシャの開放作業を示す上面図及び側面部分断面図である。(A) is a side fragmentary sectional view showing the opening operation of the washer used in the application example of the reverse rotation prevention structure, and (B) is a top view and side surface partial cross section showing the opening operation of the washer used in the application example. FIG. 第三実施形態に係るねじ体の逆回転防止構造の、(A)ワッシャの上面図及び側面部分断面図、(B)ワッシャと雄ねじ体が一体化した状態を示す側面部分断面図、(C)は締結状態を示す側面部分断面図である。(A) Top view and side partial sectional view of washer, (B) Side partial sectional view showing a state in which the washer and male threaded body are integrated, (C) FIG. 4 is a side sectional view showing a fastening state. 同逆回転防止構造の応用例で用いられるワッシャの上面図及び側面部分断面図である。It is the upper side figure and side surface fragmentary sectional view of a washer used by the application example of the reverse rotation prevention structure. 第四実施形態に係るねじ体の逆回転防止構造の、(A)ワッシャの上面図及び側面部分断面図、(B)締結状態を示す側面部分断面図である。(A) The top view and side surface fragmentary sectional view of a washer, (B) The side surface fragmentary sectional view which shows the fastening state of the reverse rotation prevention structure of the screw body which concerns on 4th embodiment. 第一から第四実施形態の応用例に係るねじ体の逆回転防止構造の締結状態を示す(A)上面図、(B)側面部分断面図である。It is the (A) top view and (B) side surface fragmentary sectional view which show the fastening state of the reverse rotation prevention structure of the screw body which concerns on the application example of 1st to 4th embodiment. 本発明のねじ体の逆回転防止構造を雌ねじ体に適用した場合の締結状態を示す側面部分断面図である。It is a side surface fragmentary sectional view which shows the fastening state at the time of applying the reverse rotation prevention structure of the screw body of this invention to an internal thread body.
以下、本発明の実施の形態について図面を参照しながら詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図1には、第一実施形態に係るねじ体の逆回転防止構造が示されている。図3の通り、ねじ体の逆回転防止構造では、雄ねじ体10と、環状のワッシャ50と、被締結部材80と、基台90を備えて構成される。基台90には、雄ねじ体10と螺合するための雌ねじ穴92が形成されており、基台90と雄ねじ体10で挟まれることで、被締結部材80が固定される。   FIG. 1 shows a reverse rotation prevention structure for a screw body according to the first embodiment. As shown in FIG. 3, the reverse rotation prevention structure of the screw body includes the male screw body 10, an annular washer 50, a fastened member 80, and a base 90. A female screw hole 92 for screwing with the male screw body 10 is formed in the base 90, and the fastened member 80 is fixed by being sandwiched between the base 90 and the male screw body 10.
雄ねじ体10は、所謂ボルトであり、頭部20と軸部30を有する。頭部20の下部乃至付け根に相当する部位には、ねじ体側座部22が形成される。軸部30には、円筒部30aとねじ部30bとが形成される。勿論、円筒部30aは必須ではない。   The male screw body 10 is a so-called bolt and has a head portion 20 and a shaft portion 30. A screw body side seat portion 22 is formed at a portion corresponding to a lower portion or a root of the head 20. The shaft portion 30 is formed with a cylindrical portion 30a and a screw portion 30b. Of course, the cylindrical portion 30a is not essential.
ワッシャ50の一方側(図1の上面側)には、第一受部60が形成される。この第一受部60は、ねじ体側座部22と対向しており、両者の間には、第一係合機構Aが構成される。この第一係合機構Aは、少なくともねじ体側座部22が、締結状態の雄ねじ体10を緩める方向に回転しようとすると、第一受部60とねじ体側座部22が互いに係合して、当該回転方向に対する第一受部60とねじ体側座部22との相対回転を防止する。   A first receiving portion 60 is formed on one side of the washer 50 (upper surface side in FIG. 1). The first receiving portion 60 faces the screw body side seat portion 22, and a first engagement mechanism A is configured between the two. In the first engagement mechanism A, when at least the screw body side seat portion 22 tries to rotate in the direction of loosening the male screw body 10 in the fastened state, the first receiving portion 60 and the screw body side seat portion 22 engage with each other, Relative rotation between the first receiving portion 60 and the screw body side seat portion 22 with respect to the rotation direction is prevented.
ワッシャ50の他方側(図1の下面側)には、第二受部70が形成される。この第一受部70は、被締結部材80と対向する。   A second receiving portion 70 is formed on the other side (the lower surface side in FIG. 1) of the washer 50. The first receiving part 70 faces the fastened member 80.
被締結部材80には、ワッシャ50の第二受部70に対向する部材側座部82が形成される。被締結部材80の部材側座部82と、ワッシャ50の第二受部70の間には、第二係合機構Bが構成される。この第二係合機構Bは、少なくともワッシャ50が、雄ねじ体10と共に、緩める方向に回転しようとすると、第一受部70と部材側座部82が互いに係合して、当該回転方向に対する第二受部70と部材側座部82との相対回転を防止する。   In the fastened member 80, a member side seat portion 82 that faces the second receiving portion 70 of the washer 50 is formed. A second engagement mechanism B is configured between the member side seat portion 82 of the fastened member 80 and the second receiving portion 70 of the washer 50. In the second engagement mechanism B, when at least the washer 50 rotates together with the male screw body 10 in the loosening direction, the first receiving portion 70 and the member side seat portion 82 engage with each other, and the second engagement mechanism B Relative rotation between the two receiving portions 70 and the member side seat portion 82 is prevented.
この第一係合機構Aと第二係合機構Bの作用により、雄ねじ体10が緩み方向に回転しようとすると、ワッシャ50の介在によって、雄ねじ体10と被締結部材80の相対回転が規制される。結果、雄ねじ体10が緩むことが防止される。   When the male screw body 10 tries to rotate in the loosening direction by the action of the first engagement mechanism A and the second engagement mechanism B, the relative rotation of the male screw body 10 and the fastened member 80 is restricted by the interposition of the washer 50. The As a result, the male screw body 10 is prevented from loosening.
図2に示すように、第一係合機構Aとして、雄ねじ体10のねじ体側座部22には、ねじ体側凹凸24が形成される。ねじ体側凹凸24は、周方向に複数連続して設けられる鋸刃形状と成っている。ねじ体側凹凸24の各々が延びる方向、即ち、稜線が延びる方向は、雄ねじ体10の半径方向となっている。結果、ねじ体側凹凸24は、軸心から放射状に延びる。   As shown in FIG. 2, as the first engagement mechanism A, the screw body side uneven portion 24 is formed on the screw body side seat portion 22 of the male screw body 10. The screw body side unevenness 24 has a saw blade shape that is continuously provided in the circumferential direction. The direction in which each of the screw body side irregularities 24 extends, that is, the direction in which the ridge line extends is the radial direction of the male screw body 10. As a result, the screw body side unevenness 24 extends radially from the axis.
更に、このねじ体側座部22は、半径方向に傾斜するねじ体側テーパ面26が形成される。このねじ体側テーパ面26は、中心側がねじ先に近づくように傾斜しているので、結果として、ねじ先側に凸の円錐形状となる。更に好ましくは、このねじ体側テーパ面26に、既述のねじ体側凹凸24が形成される。   Further, the threaded body side seat portion 22 is formed with a threaded body side tapered surface 26 inclined in the radial direction. The screw body-side tapered surface 26 is inclined so that the center side approaches the screw tip, and as a result, has a conical shape convex to the screw tip side. More preferably, the aforementioned threaded body side unevenness 24 is formed on the threaded body side tapered surface 26.
図3に示されるように、第一係合機構Aとして、ワッシャ50の第一受部60には、ねじ体側凹凸24と係合する第一受部側凹凸64が形成される。第一受部側凹凸64は、周方向に複数連続して設けられる鋸刃形状となっている。第一受部側凹凸64の各々が延びる方向、即ち稜線が延びる方向は、雄ねじ体10の半径方向に沿っている。結果、第一受部側凹凸64は、ワッシャ50の貫通穴52の中心から放射状に延びる。   As shown in FIG. 3, as the first engagement mechanism A, the first receiving portion 60 of the washer 50 is formed with a first receiving portion side unevenness 64 that engages with the screw body side unevenness 24. The 1st receiving part side unevenness | corrugation 64 becomes the saw blade shape provided in multiple numbers by the circumferential direction continuously. The direction in which each of the first receiving portion side irregularities 64 extends, that is, the direction in which the ridge line extends, is along the radial direction of the male screw body 10. As a result, the first receiving portion side unevenness 64 extends radially from the center of the through hole 52 of the washer 50.
更に、好ましくは、この第一受部60は、半径方向に傾斜するワッシャ側テーパ面66が形成される。このワッシャ側テーパ面66は、中心側がねじ先に近づくように傾斜してすり鉢状を成しているので、結果として、ねじ先側に凹の円錐形状となる。このワッシャ側テーパ面66に、既述の第一受部側凹凸64が形成される。   Further, preferably, the first receiving portion 60 is formed with a washer-side tapered surface 66 inclined in the radial direction. The washer-side tapered surface 66 has a mortar shape that is inclined so that the center side approaches the screw tip. As a result, a concave conical shape is formed on the screw tip side. On the washer-side tapered surface 66, the above-described first receiving portion-side irregularities 64 are formed.
結果、雄ねじ体10を締め付ける際に、第一係合機構Aでは、ワッシャ50のワッシャ側テーパ面66の凹内に、ねじ体側座部22のねじ体側テーパ面26が進入し、ねじ体側凹凸24と第一受部側凹凸64が係合する。両者の鋸歯形状は、図4(A)に示されるように、雄ねじ体20が、締結方向Yに回転しようとすると、互いの傾斜面24Y、64Yが当接して、両者の距離を軸方向に離しながら、相対スライドを許容する。一方、雄ねじ体20が、緩み方向Xに回転しようとすると、互いの垂直面(傾斜が強い側の面)24X、64Xが当接して、両者の相対移動を防止する。とりわけ第一係合機構Aは、雄ねじ体10を締め付けることによって、ねじ体側座部22と第一受部60の距離が縮む程、ねじ体側凹凸24と第一受部側凹凸64の噛み合いが強くなり、緩み方向X側の係合強度が高められる。ここで、ねじ体側テーパ面26の傾斜角度と、ワッシャ側テーパ面66の傾斜角度とを互いに異ならせること、特にワッシャ側テーパ面66の軸心からの傾斜角度をねじ体側テーパ面26の軸心からの傾斜角度よりも狭めに設定することで、それぞれのテーパ面に形成される鋸歯のピッチに因らず、ガタ付き無く締め付けることも可能となる。   As a result, when the male screw body 10 is tightened, in the first engagement mechanism A, the screw body side tapered surface 26 of the screw body side seat portion 22 enters the recess of the washer side tapered surface 66 of the washer 50, and the screw body side unevenness 24. And the first receiving portion side unevenness 64 are engaged. As shown in FIG. 4 (A), when the male screw body 20 tries to rotate in the fastening direction Y, the inclined surfaces 24Y and 64Y come into contact with each other, and the distance between them is set in the axial direction. Allow relative sliding while separating. On the other hand, when the male screw body 20 tries to rotate in the loosening direction X, the vertical surfaces (surfaces with a strong inclination) 24X and 64X come into contact with each other to prevent relative movement between the two. In particular, in the first engagement mechanism A, as the distance between the screw body side seat portion 22 and the first receiving portion 60 decreases by tightening the male screw body 10, the engagement between the screw body side unevenness 24 and the first receiving portion side unevenness 64 becomes stronger. Thus, the engagement strength on the loosening direction X side is increased. Here, the inclination angle of the screw body side taper surface 26 and the inclination angle of the washer side taper surface 66 are made different from each other. In particular, the inclination angle from the axis of the washer side taper surface 66 is set to the axis of the screw body side taper surface 26. By setting it to be narrower than the inclination angle from, it is possible to tighten without rattling regardless of the pitch of the sawtooth formed on each tapered surface.
図3に戻って、ワッシャ50の第二受部70の外壁72は、ねじの軸心からの距離が周方向に沿って変動する。具体的に、この外壁72は、ねじの軸心(貫通孔52の中心)に対して偏心した円形状となっている。   Returning to FIG. 3, the distance from the axial center of the screw of the outer wall 72 of the second receiving portion 70 of the washer 50 varies along the circumferential direction. Specifically, the outer wall 72 has a circular shape that is eccentric with respect to the axis of the screw (the center of the through hole 52).
一方、被締結部材80の部材側座部82は、ワッシャ50の第二受部70を収容するための収容凹部84を備えており、且つ、この収容凹部84の内壁も、ねじの軸心に対して偏心した円形状となっている。なお、偏心量は、第二受部70と収容凹部84で同じであり、第二受部70と収容凹部84の直径差(余裕隙間)は、偏心量よりも小さく設定される。   On the other hand, the member side seat portion 82 of the fastened member 80 is provided with a housing recess 84 for housing the second receiving portion 70 of the washer 50, and the inner wall of the housing recess 84 is also formed on the axis of the screw. On the other hand, it has an eccentric circular shape. The amount of eccentricity is the same for the second receiving portion 70 and the accommodating recess 84, and the difference in diameter (margin gap) between the second receiving portion 70 and the accommodating recess 84 is set smaller than the amount of eccentricity.
従って、図1に示されるように、ワッシャ50の第二受部70が、被締結部材80の収容凹部84に収容されると、両者が嵌り合う結果となり、ねじの軸心を合わせた状態のままでは、両者の周方向の相対回転が規制される。即ち、この第二受部70と収容凹部84が第二係合機構Bとして作用する。   Therefore, as shown in FIG. 1, when the second receiving portion 70 of the washer 50 is received in the receiving recess 84 of the fastened member 80, the two fit together, and the screw shafts are aligned. As it is, relative rotation in the circumferential direction of both is restricted. That is, the second receiving portion 70 and the accommodating recess 84 act as the second engagement mechanism B.
以上、第一実施形態のねじ体の逆回転防止構造によれば、ワッシャ50を介在させることによって、ねじ体側座部22と第一受部60の間に第一係合機構Aを構成し、部材側座部82と第二受部70の間に第二係合機構Bを構成し、雄ねじ体10が緩もうとすると、第一係合機構A及び第二係合機構Bの双方の規制作用によって、雄ねじ体10が被締結部材80と周方向に係合した状態となり、逆回転すること、即ち緩むことが防止される。従って、振動等が生じても、全く緩まない締結状態を得ることが出来る。   As mentioned above, according to the reverse rotation prevention structure of the screw body of the first embodiment, the first engagement mechanism A is configured between the screw body side seat portion 22 and the first receiving portion 60 by interposing the washer 50. When the second engagement mechanism B is configured between the member side seat portion 82 and the second receiving portion 70 and the male screw body 10 is about to be loosened, both the first engagement mechanism A and the second engagement mechanism B are restricted. By the action, the male screw body 10 is engaged with the fastened member 80 in the circumferential direction, and the reverse rotation, that is, the loosening is prevented. Therefore, even if vibration etc. arise, the fastening state which does not loosen at all can be obtained.
更に本実施形態では、第一係合機構Aとして、ねじ体側凹凸24と第一受部側凹凸64が、周方向に複数連続する鋸刃形状と成っており、所謂ラチェット機構又はワンウエイクラッチ機構として作用する。結果、締結動作時は、ねじ体側凹凸24と第一受部側凹凸64の相対移動を許容して、円滑な相対回転を実現する一方、緩み動作時は、ねじ体側凹凸24と第一受部側凹凸64の相対移動を完全に規制する。結果、締結時の作業性と、その後の緩み止めを合理的に両立出来る。   Further, in the present embodiment, as the first engagement mechanism A, the screw body side unevenness 24 and the first receiving portion side unevenness 64 are formed in a saw blade shape in which a plurality of continuous in the circumferential direction, and as a so-called ratchet mechanism or one-way clutch mechanism Works. As a result, during the fastening operation, the screw body side unevenness 24 and the first receiving portion side unevenness 64 are allowed to move relative to each other to realize smooth relative rotation, while during the loosening operation, the screw body side unevenness 24 and the first receiving portion. The relative movement of the side irregularities 64 is completely restricted. As a result, workability at the time of fastening and subsequent locking can be rationally achieved.
また本第一実施形態では、第一係合機構Aとして、ねじ体側座部22と第一受部60には、ねじ体側テーパ面26、ワッシャ側テーパ面66が形成されるので、両者の当接面積を大きくすることが出来る。また、雄ねじ体10の軸線方向の締結力が、テーパ面によって半径方向にも作用する。互いのテーパ面を半径方向に押し付けることで、自励的にセンタリング出来る。結果、雄ねじ体10とワッシャ50の同芯度が高められ、ねじ体側凹凸24と第一受部側凹凸64の係合精度を高めることが出来る。なお、凸側のねじ体側テーパ面26の傾斜を微小に大きくし、凹側のワッシャ側テーパ面66の傾斜角を微小に小さくして、角度に微小差を設けておくことも好ましい。このようにすると、締め付け圧力の増大に伴って、中心から半径方向外側に向かって、互いのテーパ面を少しずつ当接させることが出来る。   In the first embodiment, as the first engagement mechanism A, the screw body side seat portion 22 and the first receiving portion 60 are formed with the screw body side taper surface 26 and the washer side taper surface 66. The contact area can be increased. Further, the fastening force in the axial direction of the male screw body 10 also acts in the radial direction by the tapered surface. By pressing the taper surfaces of each other in the radial direction, centering can be carried out by self-excitation. As a result, the concentricity of the male screw body 10 and the washer 50 is increased, and the engagement accuracy between the screw body side unevenness 24 and the first receiving portion side unevenness 64 can be increased. It is also preferable to slightly increase the inclination of the convex screw body side tapered surface 26 and slightly decrease the inclination angle of the concave washer side tapered surface 66 so as to provide a small difference in angle. If it does in this way, a mutual taper surface can be made to contact | abut little by little toward the radial direction outer side from the center with the increase in clamping pressure.
また更に、本第一実施形態では、第二係合機構Bとして、ワッシャ50の第二受部70の外壁と、被締結部材80の収容凹部84の内壁の形状が、ねじの軸心に対して同心円となることを回避している。換言すると、収容凹部84の内壁及び第二受部70の外壁は、ねじの軸心からの距離が周方向に沿って変化する。この形状によって、収容凹部84の内壁と第二受部70が嵌り合うと、互いの軸心を合わせたままでは、周方向の相対回転が規制される。特にここでは、偏心した正円形状となっているので、ワッシャ50や被締結部材80の形状加工を極めて簡単としつつも、両者の相対回転を防止出来る。   Furthermore, in the first embodiment, as the second engagement mechanism B, the shape of the outer wall of the second receiving portion 70 of the washer 50 and the inner wall of the accommodating recess 84 of the fastened member 80 is different from the axial center of the screw. To avoid concentric circles. In other words, the distance from the axial center of the screw of the inner wall of the housing recess 84 and the outer wall of the second receiving portion 70 changes along the circumferential direction. With this shape, when the inner wall of the housing recess 84 and the second receiving portion 70 are fitted, the relative rotation in the circumferential direction is restricted while keeping the axial centers thereof aligned. In particular, here, since it has an eccentric circular shape, it is possible to prevent relative rotation between the two while making the shape processing of the washer 50 and the fastened member 80 extremely simple.
なお、本第一実施形態では、第一係合機構Aとして、ねじ体側凹凸24と第一受部側凹凸64が鋸刃形状の場合を例示したが、本発明はこれに限定されない。例えば図4(B)に示されるように、互いの凹凸を山形(双方とも傾斜面)にすることも可能である。このようにすると、雄ねじ体20が緩み方向Xに回転する際、互いの傾斜面24X,64Xが相対移動しようとするが、この傾斜面に沿って、ねじ体側凹凸24と第一受部側凹凸64が離れようとする。この移動距離(離れる角度α)を、雄ねじ体10のリード角より大きく設定すれば、雄ねじ体10が緩もうとしても、それ以上にねじ体側凹凸24と第一受部側凹凸64が離れようとするので、緩むことが出来なくなる。なお、この図4(B)では、断面二等辺三角形の凹凸を例示したが、図4(C)のように、締結回転時に当接する傾斜面24Y、64Yの傾斜角よりも、緩み回転時に当接する傾斜面24X,64Xの傾斜角をなだらかにすることも好ましい。このようにすると、締結回転時に、互いに乗り越えなければならない傾斜面24Y、64Yの周方向距離Pを短くすることができるので、締結後のガタ(隙間)を少なく出来る。   In the first embodiment, the case where the screw body side unevenness 24 and the first receiving portion side unevenness 64 have a saw blade shape is illustrated as the first engagement mechanism A, but the present invention is not limited to this. For example, as shown in FIG. 4B, the unevenness of each other can be a mountain shape (both are inclined surfaces). In this manner, when the male screw body 20 rotates in the loosening direction X, the inclined surfaces 24X and 64X tend to move relative to each other. The screw body side unevenness 24 and the first receiving portion side unevenness are along the inclined surface. 64 tries to leave. If this moving distance (separation angle α) is set larger than the lead angle of the male screw body 10, even if the male screw body 10 tries to loosen, the screw body side unevenness 24 and the first receiving part side unevenness 64 are more likely to be separated from each other. You will not be able to relax. In FIG. 4B, the irregularity of the isosceles triangle is illustrated. However, as shown in FIG. 4C, the angle of the inclined surfaces 24Y and 64Y that are in contact with each other at the time of fastening rotation is smaller than that at the time of loose rotation. It is also preferable to make the inclination angles of the inclined surfaces 24X and 64X in contact with each other gentle. In this way, the circumferential distance P between the inclined surfaces 24Y and 64Y that must be overcome during fastening rotation can be shortened, so that looseness (gap) after fastening can be reduced.
また、図4(A)〜(C)の応用として、図4(D)に示されるように、峯と谷を湾曲させた波型の凹凸も好ましい。締結時に滑らかな操作性を得ることができる。更に、本第一実施形態では、半径方向に延びる凹凸を例示したが、図5(A)に示されるように、渦巻き状(スパイラル状)の溝又は山(凹凸)を形成することも好ましい。また図5(B)のように、直線状に延びる溝又は山(凹凸)であっても、ねじの半径方向に対して周方向位相が変化するように傾斜配置することもできる。また、図5(C)に示されるように、微細凹凸を、ねじの周方向且つ半径方向の双方(平面状)に複数形成した、いわゆるエンボス形状を採用することも好ましい。   Moreover, as an application of FIGS. 4A to 4C, as shown in FIG. 4D, corrugated irregularities with curved ridges and valleys are also preferable. Smooth operability can be obtained during fastening. Furthermore, in the first embodiment, the unevenness extending in the radial direction is illustrated, but it is also preferable to form a spiral (spiral) groove or mountain (unevenness) as shown in FIG. Further, as shown in FIG. 5B, even a groove or mountain (unevenness) extending linearly can be inclined so that the circumferential phase changes with respect to the radial direction of the screw. Further, as shown in FIG. 5C, it is also preferable to adopt a so-called embossed shape in which a plurality of fine irregularities are formed both in the circumferential direction and the radial direction (planar shape) of the screw.
更に本第一実施形態のように、ねじ体側凹凸24と第一受部側凹凸64の凹凸形状を必ずしも一致(相似)させる必要はない。例えば、図4及び図5の各種形状から異なるものを互いに選択して組み合わせることも出来る。   Further, unlike the first embodiment, the uneven shapes of the screw body side unevenness 24 and the first receiving portion side unevenness 64 are not necessarily matched (similar). For example, different shapes from the various shapes in FIGS. 4 and 5 can be selected and combined with each other.
本第一実施形態では、ねじ体側テーパ面26を凸形状、ワッシャ側テーパ面66を凹形状にする場合を例示したが、本発明はこれに限定されない。例えば図6(A)のように、ねじ体側テーパ面26を平面形状にしたり、図6(B)のように凹形状にしたりできる。ワッシャ側テーパ面も同様である。また特に図示しないが、例えばワッシャ50の弾性変形を有効活用すれば、双方のテーパ面の傾斜角を一致させる必要はない。勿論、雄ねじ体10又はワッシャ50の一方のみにテーパ面を形成しても良い。更には、双方のテーパ面を凸形状にしたり、凹形状にしたりすることで、ワッシャの弾性変形を活用して両者を密着させることが出来る。また、ワッシャ50の弾性を得る為に、ワッシャ50の基本的な形状を螺旋状として成る所謂スプリングワッシャ状としても好い。   In the first embodiment, the case where the screw body side tapered surface 26 is convex and the washer side tapered surface 66 is concave is illustrated, but the present invention is not limited thereto. For example, as shown in FIG. 6 (A), the threaded body side tapered surface 26 can be formed into a planar shape, or can be formed into a concave shape as shown in FIG. 6 (B). The same applies to the washer-side tapered surface. Although not particularly illustrated, for example, if the elastic deformation of the washer 50 is effectively used, it is not necessary to match the inclination angles of the two tapered surfaces. Of course, a tapered surface may be formed on only one of the male screw body 10 or the washer 50. Furthermore, by making both the tapered surfaces convex or concave, the elastic deformation of the washer can be utilized to bring them into close contact. Further, in order to obtain the elasticity of the washer 50, it is preferable to use a so-called spring washer shape in which the basic shape of the washer 50 is a spiral shape.
更に、第一実施形態の応用として、図7(A)に示されるように、ワッシャ50の第二受部70の外壁及び、部材側台座部82の収容凹部84の内壁が、ねじの軸心に対して同心の部分円弧形状Sとし、残部を弦Gのように直線状に切り落としたような形状とすることも出来る。即ち、この場合においても、収容凹部84の内壁及び第二受部70の外壁は、ねじの軸心からの距離が周方向に沿って変動する。従って、弦Gの形状によって、収容凹部84の内壁と第二受部70が係合し、周方向の相対回転が規制される。   Furthermore, as an application of the first embodiment, as shown in FIG. 7A, the outer wall of the second receiving portion 70 of the washer 50 and the inner wall of the housing recess 84 of the member-side pedestal portion 82 are the axial center of the screw. On the other hand, a concentric partial arc shape S can be used, and the rest can be cut into a straight line like the chord G. That is, also in this case, the distance from the axial center of the screw of the inner wall of the housing recess 84 and the outer wall of the second receiving portion 70 varies along the circumferential direction. Accordingly, the inner wall of the housing recess 84 and the second receiving portion 70 are engaged by the shape of the string G, and relative rotation in the circumferential direction is restricted.
また図7(B)に示されるように、ワッシャ50の第二受部70の外壁が、ねじの軸心に対して同心の部分円弧形状Sとし、残部には、半径方向に延びる突起Tを形成することが出来る。この際、収容凹部84の内壁には、半径方向に凹む窪みKを形成する。この突起Tと窪みKの係合によって、収容凹部84の内壁と第二受部70が係合し、周方向の相対回転が規制される。この際、収容凹部84に形成される窪みKは、小さな正円形状(部分円弧)とすることが好ましい。収容凹部84を切削加工のする際に、棒状のドリルの1回の加工だけで、窪みKを形成出来るからである。なお、特に図示しないが、ワッシャ50の第二受部70側に窪み(切欠き)を形成し、収容凹部84側に半径方向内側に突出する突起を形成することも出来る。   7B, the outer wall of the second receiving portion 70 of the washer 50 has a partial arc shape S concentric with the axial center of the screw, and a protrusion T extending in the radial direction is formed on the remaining portion. Can be formed. At this time, a recess K recessed in the radial direction is formed in the inner wall of the housing recess 84. By the engagement of the protrusion T and the recess K, the inner wall of the housing recess 84 and the second receiving portion 70 are engaged, and the relative rotation in the circumferential direction is restricted. At this time, it is preferable that the recess K formed in the housing recess 84 has a small perfect circular shape (partial arc). This is because the recess K can be formed by only one processing of the rod-shaped drill when the housing recess 84 is cut. Although not particularly illustrated, a recess (notch) can be formed on the second receiving portion 70 side of the washer 50, and a protrusion protruding radially inward can be formed on the housing recess 84 side.
次に、図8を参照して、本発明の第二実施形態に係るねじ体の逆回転防止構造について説明する。この逆回転防止構造では、雄ねじ体10は第一実施形態と同様であるが、ワッシャ50及び被締結部材80の構造が一部異なっているので、異なる部分を中心に説明し、雄ねじ体10に関する前述と共通部分の説明は省略する。   Next, with reference to FIG. 8, the reverse rotation prevention structure of the screw body which concerns on 2nd embodiment of this invention is demonstrated. In this reverse rotation prevention structure, the male screw body 10 is the same as that in the first embodiment, but the structures of the washer 50 and the fastened member 80 are partially different. A description of common parts with the above is omitted.
ワッシャ50は、図9(A)に示されるように、第一実施形態と比較して肉薄と成っており、被締結部材80と対向する第二受部70側にも、ねじ先方向に凸となる第二ワッシャ側テーパ面76が形成される。   As shown in FIG. 9A, the washer 50 is thinner than the first embodiment, and also protrudes in the screw tip direction on the second receiving portion 70 side facing the fastened member 80. A second washer-side tapered surface 76 is formed.
なお、第一実施形態と同様に、ワッシャ50の第二受部70の外壁72及び収容凹部84の内壁は、偏心した正円形状となっているので、互いに嵌り合うことで、周方向の回転が規制される。   As in the first embodiment, the outer wall 72 of the second receiving portion 70 of the washer 50 and the inner wall of the housing recess 84 are eccentric and have a perfect circular shape, so that they can rotate in the circumferential direction by being fitted to each other. Is regulated.
図8に戻って、被締結部材80の収容凹部84の底面には、ねじ先側に凹となる部材側テーパ面86が形成される。結果、ワッシャ50の第二ワッシャ側テーパ面76と当接することにより、ワッシャ50を介して雄ねじ体10の締結力を受け止める。   Returning to FIG. 8, a member-side tapered surface 86 that is concave on the screw tip side is formed on the bottom surface of the accommodation recess 84 of the fastened member 80. As a result, the fastening force of the male screw body 10 is received through the washer 50 by coming into contact with the second washer-side tapered surface 76 of the washer 50.
更に、収容凹部84の内壁の一部には引上げ空間88が形成される。引上げ空間88は、収容凹部84の内壁が半径方向外側に拡張し、且つ、凹部の深さを大きくすることで確保される。この引上げ空間88によって、ワッシャ50の第二受部70の外壁の一部に隙間が形成される。   Further, a pulling space 88 is formed in a part of the inner wall of the housing recess 84. The pulling space 88 is secured by expanding the inner wall of the housing recess 84 radially outward and increasing the depth of the recess. The pulling space 88 forms a gap in a part of the outer wall of the second receiving portion 70 of the washer 50.
雄ねじ体10及びワッシャ50を用いて、被締結部材80を固定すると、第一係合機構Aとして、雄ねじ体10のねじ体側凹凸24と、ワッシャ50側の第一受部側凹凸64が係合する。更に、第二係合機構Bとして、ワッシャ50の第二受部70の外壁と収容凹部84の内壁が互いに嵌り合うことで、周方向の回転が規制される。結果、雄ねじ体10の逆回転が防止されること、即ちが緩まないことになる。   When the fastened member 80 is fixed using the male screw body 10 and the washer 50, the screw body side unevenness 24 of the male screw body 10 and the first receiving portion side unevenness 64 on the washer 50 side are engaged as the first engagement mechanism A. To do. Further, as the second engagement mechanism B, the outer wall of the second receiving portion 70 of the washer 50 and the inner wall of the accommodating recess 84 are fitted to each other, so that circumferential rotation is restricted. As a result, the reverse rotation of the male screw body 10 is prevented, that is, is not loosened.
図9(B)には、雄ねじ体10を強制的に緩める場合の操作について説明する。例えばマイナスドライバDの先端を、引上げ空間88内に挿入することによって、その先端をワッシャ50の背面側に挿入する。この状態で、マイナスドライバDの先端を持ち上げることにより、ワッシャ50の第二受部70を上方に変形させることが出来る。結果、第二受部70と収容凹部84による第二係合機構Bが解放される。この状態で、雄ねじ体10を緩み方向に回転させれば、ワッシャ50も一緒に回転できるので、雄ねじ体10を緩めることが出来る。   FIG. 9B illustrates an operation when the male screw body 10 is forcibly loosened. For example, by inserting the tip of the minus driver D into the pulling space 88, the tip is inserted into the back side of the washer 50. In this state, by lifting the tip of the minus driver D, the second receiving part 70 of the washer 50 can be deformed upward. As a result, the second engagement mechanism B formed by the second receiving portion 70 and the accommodating recess 84 is released. If the male screw body 10 is rotated in the loosening direction in this state, the washer 50 can also be rotated together, so that the male screw body 10 can be loosened.
なお、この第二実施形態では、被締結部材80の収容凹部84に引上げ空間88を形成する場合を例示したが、本発明はこれに限定されない。例えば、図10(A)に示されるように、ワッシャ50の外壁に傾斜面77Aを形成することで、マイナスドライバDの先端を、ワッシャ50の背面側(被締結部材80側)に挿入できるようにする。また、図10(B)に示されるように、ワッシャ50の周縁に、被締結部材80から離れるような挿入用凹部77Bを形成する。この挿入用凹部77Bを介して、マイナスドライバDの先端をワッシャ50の背面側に挿入出来るようにする。この他、ワッシャ50の外径と、収容凹部84の内径との径差を利用して、三日月状の間隙を作出し、この三日月状の間隙(図示省略)を利用してマイナスドライバDの先端をワッシャ50の背面側に挿入可能としても好い。   In the second embodiment, the case where the pulling space 88 is formed in the housing recess 84 of the fastened member 80 is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 10A, by forming an inclined surface 77A on the outer wall of the washer 50, the tip of the minus driver D can be inserted into the back side of the washer 50 (the fastened member 80 side). To. Further, as shown in FIG. 10B, an insertion recess 77B is formed on the periphery of the washer 50 so as to be separated from the fastened member 80. The tip of the minus driver D can be inserted into the back side of the washer 50 through the insertion recess 77B. In addition, a crescent-shaped gap is created using the diameter difference between the outer diameter of the washer 50 and the inner diameter of the housing recess 84, and the tip of the minus driver D is created using this crescent-shaped gap (not shown). Can be inserted into the back side of the washer 50.
図11には、第三実施形態のねじの緩み防止構造が示されている。図11(B)に示されるように、雄ねじ体10のねじ体側座部22は平面形状となっており、そこに鋸刃形状のねじ体側凹凸24が形成される。また、雄ねじ体10の軸部30の根本には、ワッシャ50を保持するためのくびれ32が形成される。   FIG. 11 shows the screw loosening prevention structure of the third embodiment. As shown in FIG. 11B, the screw body side seat portion 22 of the male screw body 10 has a planar shape, and a saw blade-shaped screw body side unevenness 24 is formed there. Further, a constriction 32 for holding the washer 50 is formed at the root of the shaft portion 30 of the male screw body 10.
図11(A)の通り、ワッシャ50の第一受部60も平面形状となっており、そこに鋸刃形状の第一受部側凹凸64が形成される。ワッシャ50の貫通孔52には、内周側に突出する係合突起52Aが形成され、雄ねじ体10のくびれ32と係合する。結果、予め、雄ねじ体10とワッシャ50を一体化(結合)することが可能となる。   As shown in FIG. 11A, the first receiving portion 60 of the washer 50 has a planar shape, and a saw-tooth-shaped first receiving portion-side unevenness 64 is formed there. In the through hole 52 of the washer 50, an engagement protrusion 52 </ b> A that protrudes toward the inner peripheral side is formed, and is engaged with the constriction 32 of the male screw body 10. As a result, the male screw body 10 and the washer 50 can be integrated (coupled) in advance.
更にワッシャ50の第二受部70には、ねじの軸線方向に延びるワッシャ側段部74が形成される。ここでは、被締結部材80側に屈曲する爪によって、ワッシャ側段部74が構成される。   Furthermore, a washer side stepped portion 74 extending in the axial direction of the screw is formed in the second receiving portion 70 of the washer 50. Here, the washer-side stepped portion 74 is constituted by a claw bent toward the fastened member 80 side.
一方、被締結部材80の部材側座部82には、ねじの軸線方向に伸びる部材側段部82Aを有する。この部材側段部82Aは、ねじ先側に落ち込むような段差となる。ワッシャ側段部74と部材側段部82Aのねじの軸心からの距離は、互いに一致している。従って、図11(C)に示されるように、雄ねじ体10を締め付ければ、ワッシャ側段部74と部材側段部82Aを係合し、ワッシャ50と被締結部材80の相対回転が防止される。   On the other hand, the member side seat portion 82 of the fastened member 80 has a member side step portion 82A extending in the axial direction of the screw. The member-side stepped portion 82A is a step that falls to the screw tip side. The distances from the screw shaft center of the washer side step 74 and the member side step 82A coincide with each other. Accordingly, as shown in FIG. 11C, when the male screw body 10 is tightened, the washer side stepped portion 74 and the member side stepped portion 82A are engaged, and the relative rotation of the washer 50 and the fastened member 80 is prevented. The
なお、本第三実施形態では、雄ねじ体10のくびれ32とワッシャ50の係合突起52Aによって、予め両者を一体化する場合を例示したが、その手法はこれに限定されない。例えば、少なくとも一方に磁気を持たせることで、雄ねじ体10とワッシャ50を磁力で一体化することもできる。その他にも、接着剤、(スポット)溶接、圧入(摩擦力)によって雄ねじ体10とワッシャ50を予め一体化することもできる。また、Oリング等の補助具を用いて、雄ねじ体10とワッシャ50を一体化することも可能である。   In the third embodiment, the case where the two are integrated in advance by the constriction 32 of the male screw body 10 and the engagement protrusion 52A of the washer 50 is exemplified, but the method is not limited to this. For example, the male screw body 10 and the washer 50 can be integrated by magnetic force by giving magnetism to at least one of them. In addition, the male screw body 10 and the washer 50 can be integrated in advance by an adhesive, (spot) welding, or press-fitting (frictional force). It is also possible to integrate the male screw body 10 and the washer 50 using an auxiliary tool such as an O-ring.
なお、ここでは、ワッシャ50の外周にワッシャ側段部74が形成される場合を例示したが、本発明はこれに限定されない。例えば図12に示されるように、ワッシャ50における外縁よりも内側に、ワッシャ側段部(突起)74を形成することも出来る。被締結部材80の収容凹部84内に、このワッシャ側段部74を収容する部材側段部(窪み)82Aを形成する。結果、ワッシャ側段部(突起)74と部材側段部(窪み)82Aが係合して、相対回転が防止される。   In addition, although the case where the washer side step part 74 was formed in the outer periphery of the washer 50 was illustrated here, this invention is not limited to this. For example, as shown in FIG. 12, a washer side step (projection) 74 can be formed inside the outer edge of the washer 50. A member-side stepped portion (depression) 82 </ b> A for accommodating the washer-side stepped portion 74 is formed in the accommodating recess 84 of the fastened member 80. As a result, the washer-side step (projection) 74 and the member-side step (depression) 82A are engaged to prevent relative rotation.
図13には、本発明の第四実施形態のねじ体の逆回転防止構造が示されている。図13(A)の通り、ワッシャ50の外形は、ねじの軸心に対して偏心した円形である。ワッシャ50は、所謂皿ばねになっており、雄ねじ体10からの締結力を受けると、軸線方向に弾性変形する。   FIG. 13 shows a reverse rotation prevention structure for a screw body according to a fourth embodiment of the present invention. As shown in FIG. 13A, the outer shape of the washer 50 is a circular shape that is eccentric with respect to the axial center of the screw. The washer 50 is a so-called disc spring, and when it receives a fastening force from the male screw body 10, it is elastically deformed in the axial direction.
図13(B)に示されるように、ワッシャ50は、被締結部材80に形成される偏心円形の収容凹部82に収容される。雄ねじ体10のねじ体側座部22は、中心側にねじ体側凹凸24が形成され、ワッシャ50の第一受部側凹凸64と係合する。また、ねじ体側座部22におけるねじ体側凹凸24の外側には、被締結部材80と直接当接する押圧面23が形成される。   As shown in FIG. 13B, the washer 50 is accommodated in an eccentric circular accommodation recess 82 formed in the fastened member 80. The threaded body side seat portion 22 of the male threaded body 10 has a threaded body side unevenness 24 formed at the center, and engages with the first receiving portion side unevenness 64 of the washer 50. Further, on the outer side of the screw body side unevenness 24 in the screw body side seat portion 22, a pressing surface 23 that directly contacts the fastened member 80 is formed.
更に収容凹部82の底面と、雄ねじ体10のねじ体側凹凸24の間の隙間Lは、ワッシャ50の軸方向寸法と比較して多少小さく設定される。結果、雄ねじ体10を締め付けると、ワッシャ50は、収容凹部82の底面とねじ体側凹凸24に挟み込まれて弾性変形する。しかし、この弾性変形量は、ねじ体側凹凸24と第一受部側凹凸64の相対回転を抑止する程度で十分である。なぜなら、雄ねじ体10の締結力は、押圧面23を介して直接的に被締結部材80に伝達されるからである。本実施形態のようにすれば、ワッシャ50自体の強度、剛性を低くすることが出来るので、製造コストを低減することが出来る。   Furthermore, the gap L between the bottom surface of the housing recess 82 and the screw body side unevenness 24 of the male screw body 10 is set to be slightly smaller than the axial dimension of the washer 50. As a result, when the male screw body 10 is tightened, the washer 50 is sandwiched between the bottom surface of the housing recess 82 and the screw body side unevenness 24 and is elastically deformed. However, the amount of elastic deformation is sufficient to prevent relative rotation of the screw body side unevenness 24 and the first receiving portion side unevenness 64. This is because the fastening force of the male screw body 10 is directly transmitted to the fastened member 80 via the pressing surface 23. According to the present embodiment, the strength and rigidity of the washer 50 itself can be lowered, so that the manufacturing cost can be reduced.
第一から第四実施形態では、雄ねじ体10の頭部20が、被締結部材80から突出する場合を例示したが、被締結部材80の収容凹部84の深さを深くすれば、頭部20までも、収容凹部84内に収容することが可能となる。   In the first to fourth embodiments, the case where the head 20 of the male screw body 10 protrudes from the fastened member 80 is illustrated. However, if the depth of the accommodation recess 84 of the fastened member 80 is increased, the head 20 Can be accommodated in the accommodating recess 84.
例えば、図14に示されるように、ワッシャ50の第一受部60を、雄ねじ体10の頭部20を収容可能な円筒形状にすることも出来る。即ち、ワッシャ50の上面に、雄ねじ体10の頭部20を収容する収容孔51を形成する。結果、頭部20が外部部材と接触し難くなるので、雄ねじ体10が緩み難い。この際、偏心円となる第二受部70を、ワッシャ50の頭部20側(図14の上端側)近傍に限定して形成することも可能である。このように、ワッシャ50に、同心円の周壁71と、偏心円の第二受部70の双方を形成し、それぞれを被締結部材80に係合させることで、周壁71によって、雌ねじ穴92との同軸性を確保しつつ、第二係合機構Bによって両者の相対回転を防止出来る。   For example, as shown in FIG. 14, the first receiving portion 60 of the washer 50 can be formed in a cylindrical shape that can accommodate the head 20 of the male screw body 10. That is, an accommodation hole 51 for accommodating the head 20 of the male screw body 10 is formed on the upper surface of the washer 50. As a result, the head 20 is less likely to come into contact with the external member, and the male screw body 10 is difficult to loosen. At this time, it is possible to limit the second receiving portion 70 to be an eccentric circle to the vicinity of the head 20 side (the upper end side in FIG. 14) of the washer 50. As described above, both the concentric circumferential wall 71 and the eccentric second receiving portion 70 are formed on the washer 50, and each is engaged with the fastened member 80. The relative engagement between the two can be prevented by the second engagement mechanism B while ensuring the coaxiality.
また更に、図14に示すように、ワッシャ50の軸方向の途中に、被締結部材80と基台90の境界面89を配置することも好ましい。このようにすると、被締結部材80と基台90の間で、境界面89に沿ったせん断力が作用した場合に、そのせん断力をワッシャ50の外周面(周壁71又は外壁72)で受け止めることが出来る。従って、雄ねじ体10を太くしなくても、ワッシャ50の剛性を高めておけば、両者が一体となって、せん断力に対する剛性を高めることが可能となる。また、この際、第一受部60の第一受部側凹凸64が形成された環状部と、偏心したフランジ状の外壁72を有する長尺の円筒状を成すワッシャ50とを別体として、環状を成す第一受部60の外周をねじの軸心に対して偏心させ、他方、ワッシャ50には当該環状部を内挿させ得る偏心嵌合部を設け、当該環状部とワッシャ50との相対回転を防止するように構成しても好い。   Furthermore, as shown in FIG. 14, it is also preferable to arrange a boundary surface 89 between the fastened member 80 and the base 90 in the middle of the washer 50 in the axial direction. In this case, when a shearing force along the boundary surface 89 acts between the fastened member 80 and the base 90, the shearing force is received by the outer peripheral surface (the peripheral wall 71 or the outer wall 72) of the washer 50. I can do it. Therefore, even if the male screw body 10 is not thickened, if the washer 50 has a high rigidity, both can be integrated and the rigidity against the shearing force can be increased. At this time, the annular portion of the first receiving portion 60 in which the first receiving portion side unevenness 64 is formed and the washer 50 having a long cylindrical shape having an eccentric flange-shaped outer wall 72 are separated, The outer periphery of the annular first receiving portion 60 is eccentric with respect to the axis of the screw. On the other hand, the washer 50 is provided with an eccentric fitting portion into which the annular portion can be inserted, and the annular portion and the washer 50 are It may also be configured to prevent relative rotation.
また、第一から第四実施形態では、雄ねじ体10の頭部とワッシャ50を係合させる場合を例示したが、雄ねじ体に適用する場合に限られず、この緩み止め機構を、雌ねじ体側に適用することも出来る。例えば、図15に示されるように、雌ねじ体18、ワッシャ50、被締結部材80の間に、第一係合機構Aと第二係合機構Bを設けることで、雌ねじ体18の逆回転を防止する事も可能である。   In the first to fourth embodiments, the case where the head of the male screw body 10 and the washer 50 are engaged is illustrated. However, the present invention is not limited to the case of applying to the male screw body, and this locking mechanism is applied to the female screw body side. You can also For example, as shown in FIG. 15, by providing the first engagement mechanism A and the second engagement mechanism B between the female screw body 18, the washer 50, and the fastened member 80, the female screw body 18 can be rotated in the reverse direction. It is also possible to prevent it.
なお、第一から第四実施形態では、ワッシャ50の外形が、円形又は部分円弧となる場合に限って例示したが、それ以外の形状を採用することができる。例えば、ワッシャ50の外形としては、楕円形、長円形、多角形等の形状であっても好い。つまり、収容凹部との嵌め合いによって相対回転を防止する場合は、軸心に対してワッシャ50の外形が「非完全円形(同心の完全円ではない状態)」であれば良いことになる。また、図13の第四実施形態では、ワッシャ50が皿ばねとして弾性変形する場合を例示したが、スプリングワッシャのように弾性変形させることも出来る。また更に、金属と弾性変形材料(例えばゴム等)を一体化した複合材料によってワッシャを形成し、弾性変形可能にすることも好ましい。   In the first to fourth embodiments, the washer 50 is exemplified only when the outer shape of the washer 50 is a circle or a partial arc, but other shapes can be adopted. For example, the outer shape of the washer 50 may be oval, oval, polygonal or the like. In other words, in order to prevent relative rotation by fitting with the accommodating recess, it is only necessary that the outer shape of the washer 50 is “non-perfect circle (not concentric perfect circle)” with respect to the shaft center. In the fourth embodiment of FIG. 13, the case where the washer 50 is elastically deformed as a disc spring is illustrated. However, it can be elastically deformed like a spring washer. Furthermore, it is also preferable that a washer is formed of a composite material in which a metal and an elastically deformable material (for example, rubber) are integrated so as to be elastically deformable.
また、本発明の実施例は、上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   Further, the embodiments of the present invention are not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the scope of the present invention.
本発明によれば、簡便な構造によって、ねじの緩みを確実に防止することが可能となる。   According to the present invention, it is possible to reliably prevent screws from loosening with a simple structure.
10 雄ねじ体
20 頭部
22 ねじ体側座部
24 ねじ体側凹凸
23 押圧面
26 ねじ体側テーパ面
30 軸部
30a 円筒部
30b ねじ部
50 ワッシャ
52 貫通孔
52A 係合突起
60 第一受部
64 第一受部側凹凸
66 ワッシャ側テーパ面
70 第二受部
72 外壁
80 被締結部材
82 部材側座部
84 収容凹部
90 基台
92 雌ねじ穴
DESCRIPTION OF SYMBOLS 10 Male screw body 20 Head part 22 Screw body side seat part 24 Screw body side uneven | corrugated 23 Press surface 26 Screw body side taper surface 30 Shaft part 30a Cylindrical part 30b Screw part 50 Washer 52 Through-hole 52A Engagement protrusion 60 First receiving part 64 First receiving part Part side unevenness 66 Washer side taper surface 70 Second receiving part 72 Outer wall 80 Fastened member 82 Member side seat part 84 Housing recess 90 Base 92 Female screw hole

Claims (20)

  1. ねじ山を有するねじ体と、ワッシャと、前記ねじ体及びワッシャによって締結される被締結部材を有し、
    前記ねじ体は、前記ワッシャと対向するねじ体側座部を有して成り、
    前記ワッシャは、前記ねじ体側座部と対向する第一受部及び前記被締結部材と対向する第二受部を有して成り、
    前記被締結部材は、前記第二受部と対向する部材側座部を有して成り、
    前記ねじ体側座部と前記第一受部の間には、前記ねじ体側座部に対して特定方向の回転力が作用しても互いに係合する状態が保持される第一係合機構が構成され、
    前記部材側座部と前記第二受部の間には、前記ワッシャに対して前記特定方向の回転力が作用しても互いに係合する状態が保持される第二係合機構が構成され、締結状体の前記ねじ体の特定方向への回転を防止することを特徴とするねじ体の逆回転防止構造。
    A screw body having a screw thread, a washer, and a member to be fastened by the screw body and the washer;
    The screw body has a screw body side seat portion facing the washer,
    The washer includes a first receiving portion facing the screw body side seat portion and a second receiving portion facing the fastened member,
    The fastened member has a member side seat portion facing the second receiving portion,
    A first engagement mechanism is configured between the screw body side seat portion and the first receiving portion so that the screw body side seat portion is maintained in an engaged state even when a rotational force in a specific direction acts on the screw body side seat portion. And
    Between the member side seat portion and the second receiving portion, a second engagement mechanism is configured that maintains a state where the washers are engaged with each other even if a rotational force in the specific direction acts on the washer. A structure for preventing reverse rotation of a screw body, wherein the screw body is prevented from rotating in a specific direction.
  2. 前記第一係合機構は、前記ねじ体側座部にねじ体側凹凸が形成され、且つ、前記第一受部に前記ねじ体側凹凸と係合する第一受部側凹凸が形成され、前記係合状態を得ることを特徴とする、
    請求項1に記載のねじ体の逆回転防止構造。
    In the first engagement mechanism, a screw body side unevenness is formed on the screw body side seat portion, and a first receiving portion side unevenness engaging with the screw body side unevenness is formed on the first receiving portion, and the engagement Characterized by getting state,
    The structure for preventing reverse rotation of the screw body according to claim 1.
  3. 前記ねじ体側凹凸は、周方向に設けられる鋸刃形状であることを特徴とする、
    請求項2に記載のねじ体の逆回転防止構造。
    The screw body side unevenness is a saw blade shape provided in the circumferential direction,
    The reverse rotation prevention structure for a screw body according to claim 2.
  4. 前記ねじ体側凹凸は、周方向に設けられる山形又は波型形状であることを特徴とする、
    請求項2に記載のねじ体の逆回転防止構造。
    The screw body side unevenness is a mountain shape or a wave shape provided in the circumferential direction,
    The reverse rotation prevention structure for a screw body according to claim 2.
  5. 前記ねじ体側凹凸は、エンボス形状であることを特徴とする、
    請求項2に記載のねじ体の逆回転防止構造。
    The screw body side unevenness is an embossed shape,
    The reverse rotation prevention structure for a screw body according to claim 2.
  6. 前記ねじ体側凹凸は、渦巻き形状の溝又は山であることを特徴とする、
    請求項2に記載のねじ体の逆回転防止構造。
    The screw body side unevenness is a spiral groove or mountain,
    The reverse rotation prevention structure for a screw body according to claim 2.
  7. 前記第一受部側凹凸は、周方向に設けられる鋸刃形状であることを特徴とする、
    請求項2乃至6のいずれかに記載のねじ体の逆回転防止構造。
    The first receiving part side unevenness is a saw blade shape provided in the circumferential direction,
    The reverse rotation prevention structure for a screw body according to any one of claims 2 to 6.
  8. 前記第一受部側凹凸は、周方向に設けられる山形又は波型形状であることを特徴とする、
    請求項2乃至6のいずれかに記載のねじ体の逆回転防止構造。
    The first receiving portion side unevenness is a mountain shape or a wave shape provided in the circumferential direction,
    The reverse rotation prevention structure for a screw body according to any one of claims 2 to 6.
  9. 前記第一受部側凹凸は、エンボス形状であることを特徴とする、
    請求項2乃至6のいずれかに記載のねじ体の逆回転防止構造。
    The first receiving side unevenness is an embossed shape,
    The reverse rotation prevention structure for a screw body according to any one of claims 2 to 6.
  10. 前記第一受部側凹凸は、渦巻き形状の溝又は山であることを特徴とする、
    請求項2乃至6のいずれかに記載のねじ体の逆回転防止構造。
    The first receiving part side unevenness is a spiral groove or mountain,
    The reverse rotation prevention structure for a screw body according to any one of claims 2 to 6.
  11. 前記ねじ体側座部には、半径方向に傾斜するねじ体側テーパ面が形成されることを特徴とする、
    請求項1乃至10のいずれかに記載のねじ体の逆回転防止構造。
    In the screw body side seat portion, a screw body side tapered surface inclined in a radial direction is formed,
    The structure for preventing reverse rotation of the screw body according to any one of claims 1 to 10.
  12. 前記第一受部には、半径方向に傾斜するワッシャ側テーパ面が形成されることを特徴とする、
    請求項1乃至11のいずれかに記載のねじ体の逆回転防止構造。
    The first receiving portion is formed with a washer side tapered surface inclined in the radial direction.
    The reverse rotation prevention structure for a screw body according to any one of claims 1 to 11.
  13. 前記第一係合機構は、前記ねじ体側座部と前記第一受部の距離が縮む程、前記緩み方向の係合強度が高まるように構成されることを特徴とする、
    請求項1乃至12のいずれかに記載のねじ体の逆回転防止構造。
    The first engagement mechanism is configured to increase the engagement strength in the loosening direction as the distance between the screw body side seat portion and the first receiving portion decreases.
    The structure for preventing reverse rotation of the screw body according to any one of claims 1 to 12.
  14. 前記第一係合機構は、前記ねじ体側座部と前記第一受部の間で、前記ねじ体側座部の締め方向の相対回転を許容することを特徴とする、
    請求項1乃至13のいずれかに記載のねじ体の逆回転防止構造。
    The first engagement mechanism allows relative rotation in the tightening direction of the screw body side seat portion between the screw body side seat portion and the first receiving portion.
    The structure for preventing reverse rotation of the screw body according to any one of claims 1 to 13.
  15. 前記ワッシャは、ねじ体の軸方向に弾性変形可能であることを特徴とする、
    請求項1乃至14のいずれかに記載のねじ体の逆回転防止構造。
    The washer is elastically deformable in the axial direction of the screw body,
    The reverse rotation prevention structure for a screw body according to any one of claims 1 to 14.
  16. 前記部材側座部は、前記第二受部を収容し得る収容凹部を備えることを特徴とする、
    請求項1乃至15のいずれかに記載のねじ体の逆回転防止構造。
    The member side seat portion includes an accommodation recess capable of accommodating the second receiving portion,
    The structure for preventing reverse rotation of the screw body according to any one of claims 1 to 15.
  17. 前記第二係合機構は、前記第二受部と前記収容凹部が嵌り合うことで前記係合状態を得ることを特徴とする、
    請求項16に記載のねじ体の逆回転防止構造。
    The second engagement mechanism is characterized in that the engagement state is obtained by fitting the second receiving portion and the receiving recess.
    The reverse rotation prevention structure for a screw body according to claim 16.
  18. 前記収容凹部の内壁は、前記ねじ体の軸からの距離が周方向に沿って変動すると共に、前記第二受部の外壁は、前記ねじ体の軸からの距離が周方向に沿って変動することを特徴とする、
    請求項16又は17に記載のねじ体の逆回転防止構造。
    The inner wall of the receiving recess varies in the circumferential direction from the axis of the screw body, and the outer wall of the second receiving portion varies in the circumferential direction from the axis of the screw body. It is characterized by
    The reverse rotation prevention structure for a screw body according to claim 16 or 17.
  19. 前記収容凹部の内壁及び前記第二受部の外壁が、前記ねじ体の軸に対して偏心した円形状であることを特徴とする、
    請求項16乃至18のいずれかに記載のねじ体の逆回転防止構造。
    The inner wall of the housing recess and the outer wall of the second receiving part are circular in shape eccentric with respect to the axis of the screw body,
    The reverse rotation prevention structure for a screw body according to any one of claims 16 to 18.
  20. 前記部材側座部は、前記ねじ体の軸方向に段設された部材側段部を有し、
    前記第二受部には前記部材側段部と係合するワッシャ側段部が形成されることを特徴とする、
    請求項1乃至19のいずれかに記載のねじ体の逆回転防止構造。
    The member side seat portion has a member side step portion stepped in the axial direction of the screw body,
    The second receiving portion is formed with a washer side stepped portion that engages with the member side stepped portion.
    The reverse rotation prevention structure for a screw body according to any one of claims 1 to 19.
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Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5929134Y2 (en) * 1979-07-16 1984-08-22
JPS5630612U (en) * 1979-08-17 1981-03-25
JPH045524Y2 (en) * 1986-11-25 1992-02-17
AUPQ611800A0 (en) * 2000-03-09 2000-03-30 Smolarek, Hanna Maria Washer and threaded fastener assembly incorporating same
JP2004023227A (en) * 2002-06-13 2004-01-22 Nippon Antenna Co Ltd Antenna mounting nut
JP2005069347A (en) * 2003-08-25 2005-03-17 Teruo Nakagami Fastening structure for locking having return prevention function, and nut and washer for fastening structure
JP2006220210A (en) * 2005-02-10 2006-08-24 Aoi Seira Seisakusho:Kk Intervening member, fastener and fastened body
JP2006336855A (en) * 2005-06-02 2006-12-14 Etsuzo Kuinose Prevention of loosening of bolt and nut which enable fixation by connection of washer and bolt or nut and release by disconnection by elastic force of spring kept in contact with bottom portion of washer
JP4088638B2 (en) * 2005-06-03 2008-05-21 株式会社真島製作所 Fastening structure with flat head bolt and loosening taper ring used in this fastening structure, and fastening structure with taper nut and loosening taper ring used in this fastening structure
JP2011034707A (en) * 2009-07-30 2011-02-17 Nippon Densan Corp Screw for grounding and fastening structure of circuit board using it

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