JP3179117U - Nut locking washer - Google Patents

Nut locking washer Download PDF

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Publication number
JP3179117U
JP3179117U JP2012004940U JP2012004940U JP3179117U JP 3179117 U JP3179117 U JP 3179117U JP 2012004940 U JP2012004940 U JP 2012004940U JP 2012004940 U JP2012004940 U JP 2012004940U JP 3179117 U JP3179117 U JP 3179117U
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nut
seat surface
washer
bolt
upper seat
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芳一 阪村
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株式会社阪村機械製作所
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Abstract

【課題】形状を工夫することによりナットに緩み止め作用を確実に発揮させるワッシャーを提供する。
【解決手段】中心部にボルト挿通孔１１を有する環状のワッシャー本体の被締結部材と当接する下側座面１２を扁平に形成する一方、ワッシャー本体のナットと当接する上側座面１３をテーパー状に形成し、かつ、このテーパー状上側座面１３の傾斜角度θを、ボルトのねじ山のねじれ角よりも大きくして、このワッシャー本体をナットと被締結部材との間に介装した状態のもとでボルトにより締結する時、ナットの上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分とが局部的に強く噛み合うようにねじれを発生させてナットの緩み止めを行うようにした。
【選択図】図１Provided is a washer that makes a nut surely exhibit a locking action by devising a shape.
A lower seat surface that comes into contact with a fastened member of an annular washer body having a bolt insertion hole is formed in a flat shape, and an upper seat surface that comes into contact with a nut of the washer body is tapered. And the inclination angle θ of the tapered upper seat surface 13 is larger than the torsion angle of the screw thread of the bolt, and the washer body is interposed between the nut and the member to be fastened. Originally, when tightening with bolts, a screw portion positioned higher on the top side of the tapered upper seat surface 13 of the nut and a screw portion positioned lower on the lower side of the tapered upper seat surface 13 The nut is prevented from loosening by generating a twist so that it is strongly meshed locally.
[Selection] Figure 1

Description

本考案は、ナットと被締結部材との間に介装されるナットの緩み止めワッシャーに関する。  The present invention relates to a nut locking washer interposed between a nut and a member to be fastened.

従来、ボルトとナットにより被締結部材を締結する際、確実な締結を得るために例えばナットと被締結体との間に、ボルト挿通孔を有する平ワッシャーやスプリングワッシャーなどを介在させている。  Conventionally, when a fastened member is fastened with a bolt and a nut, for example, a flat washer having a bolt insertion hole or a spring washer is interposed between the nut and the fastened body in order to obtain reliable fastening.

そして、上記ワッシャーをナットと被締結部材との間に介装して適宜治具で締結するとき、上記ワッシャーをナットの下面全面で均等状に被締結体の表面に圧接して、ボルトの軸力による締付抵抗でナットのワッシャーへの圧接やワッシャーの弾性変形などを利用して緩み止めを行うようにしている。  When the washer is interposed between the nut and the member to be fastened and fastened with a jig as appropriate, the washer is pressed against the surface of the fastened body evenly over the entire lower surface of the nut, and the bolt shaft Tightening resistance by force is used to prevent loosening using pressure contact with the washer of the nut or elastic deformation of the washer.

ところが、上記した従来のワッシャーをナットと被締結部材との間に介装した緩み防止構造では、ボルトやナット或いは被締結部材にかかる振動などの外力により、徐々にボルトが緩み、ボルトの締結力が低下して被締結部材の締結部分が緩んだり、ボルトが外れたりする問題があった。  However, in the loosening prevention structure in which the above-described conventional washer is interposed between the nut and the fastening member, the bolt gradually loosens due to external force such as vibration applied to the bolt, the nut, or the fastening member, and the fastening force of the bolt There is a problem that the fastening portion of the member to be fastened is loosened and the bolt is detached.

そこで、本考案は、ワッシャーの形状を工夫することによりナットに緩み止め作用を確実に発揮させることができるナットの緩み止めワッシャーの提供を課題とする。  Therefore, an object of the present invention is to provide a nut locking washer that can surely exert a locking action on the nut by devising the shape of the washer.

上記した問題を解決するため、本考案は、中心部にボルト挿通孔１１を有する環状のワッシャー本体１０を備え、ワッシャー本体１０の被締結部材４と当接する下側座面１２が扁平状に形成されている一方、ワッシャー本体１０のナット３と当接する上側座面１３がテーパー状に形成され、かつ、このテーパー状上側座面１３の下側座面１２に対する傾斜角度θが、使用するボルト２のねじ山のねじれ角φよりも大きく形成されており、このワッシャー本体１０をナット３と被締結部材４との間に介装した状態のもとでボルト２により締結する時、ナット３の一端部分とワッシャー本体１０のテーパー状上側座面１３の頂部部分との偏った当接によりワッシャー本体１０を介し被締結部材４を締結する一方、ナット３の上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分Ｐ１と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分Ｐ２との二箇所で局部的に強く噛み合うようにボルト２とナット３との間においてねじれを発生させてナット３の緩み止めを行うように構成したことを特徴とする。
なお、使用するボルト２、ナット３としては、ＪｉＳ規格に基づいて形成される標準的なボルト、ナットを用いる。In order to solve the above-described problems, the present invention includes an annular washer body 10 having a bolt insertion hole 11 in the center, and a lower seat surface 12 that contacts the fastened member 4 of the washer body 10 is formed in a flat shape. On the other hand, the upper seat surface 13 that comes into contact with the nut 3 of the washer body 10 is formed in a taper shape, and the inclination angle θ with respect to the lower seat surface 12 of the taper upper seat surface 13 is the bolt 2 to be used. When the washer body 10 is fastened by the bolt 2 with the washer body 10 interposed between the nut 3 and the fastened member 4, one end of the nut 3 is formed. The clamped member 4 is fastened through the washer body 10 by biased contact between the portion and the top portion of the tapered upper seat surface 13 of the washer body 10, while the tapered upper seat surface of the nut 3 is fastened. The bolt 2 and the nut 3 so as to be strongly engaged locally at two places, the screw portion P1 positioned higher on the top side of the screw 13 and the screw portion P2 positioned lower on the lower side of the tapered upper seat surface 13. It is characterized in that the nut 3 is prevented from loosening by generating a twist between them.
As the bolt 2 and nut 3 to be used, standard bolts and nuts formed based on the JiS standard are used.

本考案によれば、上記した構成により、ワッシャー１をナット３と被締結部材４との間に介装した状態のもとでボルト２により締結する時、ナット３の一端部分がワッシャー本体１０のテーパー状上側座面１３の頂部部分を圧接することによりワッシャー本体１０を介し被締結部材４を締結する。そして、ナット３の一端部がワッシャー１のテーパー座面１３の頂部側に当接した後、さらにナット３を締め付けると、ナット３の上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分Ｐ１と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分Ｐ２とが局部的に強く噛み合うようにボルト２とナット３との間においてねじれ作用が発生し、これによりナット３の緩み発生を防止することができる。  According to the present invention, when the washer 1 is fastened by the bolt 2 with the washer 1 interposed between the nut 3 and the fastened member 4, the nut 3 has one end portion of the washer body 10. The fastened member 4 is fastened through the washer body 10 by pressing the top portion of the tapered upper seat surface 13. When the nut 3 is further tightened after one end of the nut 3 abuts against the top side of the tapered seat surface 13 of the washer 1, a screw positioned higher on the top side of the tapered upper seat surface 13 of the nut 3. A twisting action is generated between the bolt 2 and the nut 3 so that the portion P1 and the screw portion P2 positioned on the lower side on the lower side of the tapered upper seat surface 13 are strongly engaged with each other. 3 can be prevented from occurring.

本考案に係るワッシャーの一部切欠正面図である。It is a partially cutaway front view of a washer according to the present invention. 同平面図である。It is the same top view. ワッシャーの使用過程の説明図である。It is explanatory drawing of the use process of a washer. ワッシャーの使用状態の説明図である。It is explanatory drawing of the use condition of a washer.

以下本考案の実施の形態を図に基づいて説明する。  Embodiments of the present invention will be described below with reference to the drawings.

図１〜図３は、本考案のナットの緩み止めワッシャーを示し、このワッシャー１は、金属製で中心部にボルト挿通孔１１を有する環状のワッシャー本体１０を備え、ワッシャー本体１０の被締結部材４と当接する下側座面１２が扁平に形成されている一方、ワッシャー本体１０のナット３と当接する上側座面１３がテーパー状の扁平面に形成され、かつ、図３に示すようにこのテーパー状上側座面１３の下側座面１２に対する傾斜角度θが、ボルト２のねじ山のねじれ角φよりも大きく形成されている。  1 to 3 show a nut locking washer according to the present invention. This washer 1 includes an annular washer body 10 made of metal and having a bolt insertion hole 11 in the center, and a fastened member of the washer body 10. 4 is formed in a flat shape, while an upper seat surface 13 in contact with the nut 3 of the washer body 10 is formed in a tapered flat surface, and as shown in FIG. The inclination angle θ with respect to the lower seat surface 12 of the tapered upper seat surface 13 is formed larger than the twist angle φ of the thread of the bolt 2.

そして、このワッシャー１をナット３の下面と被締結部材４との間に介装した状態のもとでボルト２により締結する時、ナット３の一端部分とワッシャー本体１０のテーパー状上側座面１３の頂部部分との偏った当接によりワッシャー本体１０を介し被締結部材４を締結する一方、図４に示すようにナット３の上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分Ｐ１と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分Ｐ２との二箇所で局部的に強く噛み合うようにボルト２とナット３との間においてねじれを発生させてナット３の緩み止めを行うように構成したのである。  When the washer 1 is fastened with the bolt 2 under the condition that the washer 1 is interposed between the lower surface of the nut 3 and the fastened member 4, one end portion of the nut 3 and the tapered upper seating surface 13 of the washer body 10. The threaded portion 4 is fastened on the top side of the tapered upper seat surface 13 of the nut 3 as shown in FIG. Twist is generated between the bolt 2 and the nut 3 so as to be strongly engaged locally at two locations of P1 and the screw portion P2 positioned on the lower side on the lower side of the tapered upper seating surface 13 to thereby form the nut 3 It is configured so as to prevent the slack.

ここで、使用するボルト２、ナット３としては、ＪｉＳ規格に基づいて形成される標準的なボルト、ナットを用いる。  Here, as the bolt 2 and nut 3 to be used, standard bolts and nuts formed based on the JiS standard are used.

また、図に示す実施の形態では、ワッシャー本体１０の下側座面１２の外周部には、その厚み方向に突設される内面側がテーパー状の変形突起部１４が設けられている。その場合、ワッシャー本体１０は使用するボルト２のボルト強度とボルト径に基づく設計軸力以上の硬度を有するように形成されている一方、変形突起部１４は、締結に際し上記設計軸力に至るタイミングに合わせて図４に示すようにその先端部分が座金本体の外周端から半径方向外方にはみ出すように塑性変形され、目視により設計軸力による締め付けが行われたどうかの確認が行えるように形成されている。なお、この変形突起部１４は実施の形態のようにワッシャー本体１０の全周に設けたものであってもよいし、また部分的に複数個設けるようにしてもよい。  Further, in the embodiment shown in the figure, the outer peripheral portion of the lower seat surface 12 of the washer body 10 is provided with a deformed protrusion portion 14 whose inner surface side that projects in the thickness direction is tapered. In this case, the washer body 10 is formed to have a hardness equal to or higher than the design axial force based on the bolt strength and the bolt diameter of the bolt 2 to be used, while the deforming protrusion 14 is a timing to reach the above-mentioned design axial force when fastening. As shown in FIG. 4, the tip portion is plastically deformed so as to protrude radially outward from the outer peripheral end of the washer body, and is formed so that it can be visually confirmed whether or not the tightening has been performed by the designed axial force. Has been. In addition, this deformation | transformation projection part 14 may be provided in the perimeter of the washer main body 10 like embodiment, and you may make it provide multiple in part.

次に、以上のように構成したナットの緩み止めワッシャー１の作用について説明する。  Next, the operation of the nut locking washer 1 configured as described above will be described.

まず、図３に示すようにワッシャー１をナット３の下面と被締結部材４との間に介装した状態のもとでボルト２により締め付けて締結する。その時、ナット３の一端部分とワッシャー１のテーパー状上側座面１３の頂部部分とが当接し、これによりワッシャー１を介し被締結部材４を締め付けて締結する。  First, as shown in FIG. 3, the washer 1 is fastened and tightened with the bolt 2 in a state of being interposed between the lower surface of the nut 3 and the fastened member 4. At that time, one end portion of the nut 3 and the top portion of the tapered upper seat surface 13 of the washer 1 come into contact with each other, whereby the fastened member 4 is fastened and fastened via the washer 1.

そして、ナット３の一端部がワッシャー１のテーパー座面１３の頂部側に当接した後、さらにナット３を締め付けると、ナット３の一端部分とワッシャー１のテーパー状上側座面１３の頂部部分との偏った当接により、図４において矢印で示すように、ナット３の上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分Ｐ１と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分Ｐ２とが局部的に強く噛み合うようにボルト２とナット３との間においてねじれ作用が発生し、これによりナット３の緩み発生を防止することができる。  Then, after one end of the nut 3 abuts on the top side of the tapered seat surface 13 of the washer 1, when the nut 3 is further tightened, one end portion of the nut 3 and the top portion of the tapered upper seat surface 13 of the washer 1 are 4, as indicated by an arrow in FIG. 4, the screw portion P <b> 1 positioned higher on the top side of the tapered upper seat surface 13 of the nut 3, and the lower portion side of the tapered upper seat surface 13. Thus, a torsional action is generated between the bolt 2 and the nut 3 so that the screw portion P2 positioned at the lower position is strongly meshed locally, thereby preventing the nut 3 from being loosened.

その結果、締結終了時には、ボルト２とナット３との間において発生するねじれ作用により、ナット３の上位側に位置するねじ部分Ｐ１と下位側に位置するねじ部分Ｐ２との二箇所で局部的に強く噛み合うことにより、ボルト２とナット３の噛み合いを積極的に硬くロックすることができる。従って、ボルト２やナット３或いは被締結部材４にかかる振動などの外力などによるナット３の緩み発生を確実に防止することができる。  As a result, at the end of the fastening, the twisting action generated between the bolt 2 and the nut 3 causes the screw part P1 located on the upper side of the nut 3 and the screw part P2 located on the lower side to be locally located at two locations. By meshing strongly, the meshing of the bolt 2 and the nut 3 can be positively locked firmly. Accordingly, the occurrence of loosening of the nut 3 due to external force such as vibration applied to the bolt 2, the nut 3, or the fastened member 4 can be reliably prevented.

また、ワッシャー本体１０の下側座面１２の外周部には変形突起部１４が設けられているので、締結時には図４に示すように変形突起部１４が上記設計軸力に至るタイミングに合わせてその先端部分が座金本体の外周端から半径方向外方にはみ出すように塑性変形され、目視により設計軸力による締め付けが行われたどうかの確認が簡単容易に行える。  Further, since the deformed protrusion 14 is provided on the outer peripheral portion of the lower seat surface 12 of the washer body 10, at the time of fastening, as shown in FIG. 4, the deformed protrusion 14 matches the timing when the design axial force is reached. The tip portion is plastically deformed so as to protrude outward in the radial direction from the outer peripheral end of the washer body, and it can be easily and easily confirmed whether or not the tightening by the designed axial force is performed visually.

１ ワッシャー
１０ ワッシャー本体
１１ ボルト挿通孔
１２ 下側座面
１３ 上側座面（テーパー状上側座面）
２ ボルト
３ ナット
４ 被締結部材1 Washer 10 Washer body 11 Bolt insertion hole 12 Lower seat surface 13 Upper seat surface (tapered upper seat surface)
2 Bolt 3 Nut 4 Fastened member

Claims (1)

中心部にボルト挿通孔１１を有する環状のワッシャー本体１０を備え、ワッシャー本体１０の被締結部材４と当接する下側座面１２が扁平状に形成されている一方、ワッシャー本体１０のナット３と当接する上側座面１３がテーパー状に形成され、かつ、このテーパー状上側座面１３の下側座面１２に対する傾斜角度θが、使用するボルト２のねじ山のねじれ角φよりも大きく形成されており、このワッシャー本体１０をナット３と被締結部材４との間に介装した状態のもとでボルト２により締結する時、ナット３の一端部分とワッシャー本体１０のテーパー状上側座面１３の頂部部分との偏った当接によりワッシャー本体１０を介し被締結部材４を締結する一方、ナット３の上記テーパー状上側座面１３の頂部側で上位に位置するねじ部分Ｐ１と、上記テーパー状上側座面１３の低部側で下位に位置するねじ部分Ｐ２との二箇所で局部的に強く噛み合うようにボルト２とナット３との間においてねじれを発生させてナット３の緩み止めを行うように構成したことを特徴とするナットの緩み止めワッシャー。  An annular washer body 10 having a bolt insertion hole 11 in the center is provided, and a lower seat surface 12 that comes into contact with a fastened member 4 of the washer body 10 is formed in a flat shape, while a nut 3 of the washer body 10 is The abutting upper seat surface 13 is formed in a taper shape, and the inclination angle θ with respect to the lower seat surface 12 of the tapered upper seat surface 13 is formed larger than the twist angle φ of the thread of the bolt 2 to be used. When the washer body 10 is fastened by the bolt 2 with the nut 3 and the fastened member 4 interposed, one end portion of the nut 3 and the tapered upper seat surface 13 of the washer body 10 are provided. Threaded portion P positioned on the top side of the tapered upper seat surface 13 of nut 3 while fastening member 4 to be fastened via washer body 10 by biased contact with the top portion of 1 and a screw portion P2 positioned on the lower side on the lower side of the tapered upper seat surface 13 so that a twist is generated between the bolt 2 and the nut 3 so as to be locally strongly engaged with each other. A nut washer for preventing loosening of a nut.
JP2012004940U 2012-07-25 2012-07-25 Nut locking washer Expired - Fee Related JP3179117U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017116091A (en) * 2015-12-22 2017-06-29 有限会社クイックＮｅｔシステム Washer and fastening structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10153211A (en) * 1996-07-26 1998-06-09 Zenji Tsuchikawa Washer for preventing looseness of nut and structure for preventing looseness of nut
JP2000035025A (en) * 1998-07-17 2000-02-02 Kawasaki Steel Corp Double locking nut

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10153211A (en) * 1996-07-26 1998-06-09 Zenji Tsuchikawa Washer for preventing looseness of nut and structure for preventing looseness of nut
JP2000035025A (en) * 1998-07-17 2000-02-02 Kawasaki Steel Corp Double locking nut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017116091A (en) * 2015-12-22 2017-06-29 有限会社クイックＮｅｔシステム Washer and fastening structure

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