JP2016145607A - Retention nut - Google Patents
Retention nut Download PDFInfo
- Publication number
- JP2016145607A JP2016145607A JP2015022792A JP2015022792A JP2016145607A JP 2016145607 A JP2016145607 A JP 2016145607A JP 2015022792 A JP2015022792 A JP 2015022792A JP 2015022792 A JP2015022792 A JP 2015022792A JP 2016145607 A JP2016145607 A JP 2016145607A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- protrusion
- convex portion
- peripheral surface
- locking nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000014759 maintenance of location Effects 0.000 title abstract 2
- 230000002093 peripheral effect Effects 0.000 claims abstract description 30
- 230000002265 prevention Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000002250 progressing effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000000470 constituent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
Abstract
Description
本発明は、緩み止めナットに関する。 The present invention relates to a locking nut.
本願出願人は、従来より、高い緩み止め機能を発揮する緩み止めナット（ハードロックナット）の開発を行っており、例えば下記の特許文献１に開示している。 The applicant of the present application has conventionally developed a locking nut (hard lock nut) that exhibits a high locking function, and is disclosed in, for example, Patent Document 1 below.
このハードロックナット（登録商標）は、図５にも示すように、ボルトのネジ軸１が螺合するネジ孔２１，３１を有する下ナット２及び上ナット３からなり、下ナット２の上面には上方に突出する凸部２２が設けられ、上ナット３の下面には下ナット２の凸部２２が嵌合する凹部３２が設けられている。これら凸部２２の外周面及び凹部３２の内周面はテーパー状に形成されている。また、凸部２２はネジ孔２１に対して僅かに偏心されており、この凸部２２と上ナット３の凹部３２との偏心嵌合によって、上下ナット２，３が偏心方向に沿って互いに水平方向に押し合うように構成され、より具体的には下ナット２には偏心方向とは逆方向（図示左方向）の水平力が作用し、上ナット３には偏心方向（図示右方向）の水平力が作用し、これら水平力により大きな緩み止め作用が生じるようになっている。 As shown in FIG. 5, the hard lock nut (registered trademark) includes a lower nut 2 and an upper nut 3 having screw holes 21 and 31 into which a screw shaft 1 of a bolt is screwed. The upper nut 3 is provided with a convex portion 22 protruding upward, and the lower surface of the upper nut 3 is provided with a concave portion 32 into which the convex portion 22 of the lower nut 2 is fitted. The outer peripheral surface of the convex portion 22 and the inner peripheral surface of the concave portion 32 are formed in a tapered shape. Further, the convex portion 22 is slightly eccentric with respect to the screw hole 21, and the upper and lower nuts 2, 3 are horizontally aligned with each other along the eccentric direction by the eccentric fitting between the convex portion 22 and the concave portion 32 of the upper nut 3. More specifically, a horizontal force in the direction opposite to the eccentric direction (left direction in the figure) acts on the lower nut 2, and more specifically in the eccentric direction (right direction in the figure) on the upper nut 3. A horizontal force acts, and a large locking action is generated by these horizontal forces.
なお、ネジ孔２１，３１はそれぞれ凸部２２外周面又は凹部３２内周面より径方向内側にあり、凸部２２がネジ孔２１に対して偏心しているため、凸部２２の肉厚は周方向に不均一となっており、凸部２２のネジ孔２１に対する偏心方向（図示右方向）に向かうにつれて凸部２２の肉厚は徐々に厚くなり、偏心方向とは逆側の周方向一部（図示左側部位）で凸部２２は最も薄肉となっている。 The screw holes 21 and 31 are respectively radially inward from the outer peripheral surface of the convex portion 22 or the inner peripheral surface of the concave portion 32, and the convex portion 22 is eccentric with respect to the screw hole 21. The thickness of the convex portion 22 is gradually increased toward the eccentric direction (right direction in the figure) of the convex portion 22 with respect to the screw hole 21, and a part of the circumferential direction opposite to the eccentric direction. The convex part 22 is the thinnest in the left part of the figure.
一般に、ナットのネジ孔のメネジ有効径はボルトのネジ軸のオネジ有効径よりも僅かに大きくなされ、ボルトとナットとの間にはハメアイの遊びが若干量存在する。これはハードロックナットにおける上下ナットについても同様である。 In general, the female thread effective diameter of the screw hole of the nut is slightly larger than the male thread effective diameter of the screw shaft of the bolt, and there is a slight amount of slack play between the bolt and the nut. The same applies to the upper and lower nuts in the hard lock nut.
ハードロックナットの下ナット２をまずネジ軸１にインパクトレンチ等によって締結固定した場合、ネジ軸１とネジ孔２１のそれぞれのネジ山のフランク同士の接触による求心作用によって、図５に示すように下ナット２はネジ軸１に対して同心状に装着され、ネジ孔２１のネジ山の上側フランクとネジ軸１のネジ山の下側フランクとが強く押圧され、ネジ孔２１の下側フランクとネジ軸１の上側フランクとの間には遊びのある状態となる。 When the lower nut 2 of the hard lock nut is first fastened and fixed to the screw shaft 1 with an impact wrench or the like, the centripetal action caused by the contact between the screw shaft 1 and the screw thread flank 21 as shown in FIG. The lower nut 2 is mounted concentrically with respect to the screw shaft 1, and the upper flank of the screw hole 21 and the lower flank of the screw shaft 1 are strongly pressed, and the lower flank of the screw hole 21 and the screw shaft 1 are pressed. There is play between the upper flank and the upper flank.
その後、上ナット３をネジ軸１に締結していき、上ナット３の凹部３２と下ナット２の凸部２２とを嵌合させると、上ナット３には図示右方向の大きな水平力が生じてネジ軸１に対して僅かに図示右方向に移動するが、下ナット２には図示左方向の大きな水平力が生じるものの、被取付部材Ａの座面に対する下ナット２の下面の接触と上記フランク同士の接触とによりネジ軸１に対する下ナット２の位置は強固に固定されているため、下ナット２はネジ軸１に対して水平方向に偏心移動せず、その分凸部２２と凹部３２とが僅かに偏心した状態でテーパー嵌合する。したがって、図示のように、下ナット２の上面と上ナット３の下面との間に比較的大きな隙間が空いた状態で上ナット３が締結固定される。 Thereafter, when the upper nut 3 is fastened to the screw shaft 1 and the concave portion 32 of the upper nut 3 and the convex portion 22 of the lower nut 2 are fitted, a large horizontal force in the right direction in the figure is generated in the upper nut 3. The lower nut 2 generates a large horizontal force in the left direction, but the lower nut 2 is in contact with the lower surface of the lower nut 2 with respect to the seating surface of the mounted member A and the above. Since the position of the lower nut 2 with respect to the screw shaft 1 is firmly fixed by contact between the flankes, the lower nut 2 does not move eccentrically in the horizontal direction with respect to the screw shaft 1, and accordingly, the convex portion 22 and the concave portion 32. The taper fits in a slightly eccentric state. Therefore, as shown in the drawing, the upper nut 3 is fastened and fixed with a relatively large gap between the upper surface of the lower nut 2 and the lower surface of the upper nut 3.
かかる締結状態であっても、上記テーパー嵌合によるいわゆるクサビ作用によってネジ軸１及び上下ナット２，３には大きな水平応力が蓄積され、これにより強力な緩み止め作用が発揮される。 Even in such a fastened state, a large horizontal stress is accumulated in the screw shaft 1 and the upper and lower nuts 2 and 3 due to the so-called wedge action by the taper fitting, thereby exerting a strong loosening prevention action.
しかし、鉄道の軌道に沿って設置されるネットフェンスなどにハードロックナットを用いた場合、下ナット２の下面が当接するネットフェンスなどの被取付部材Ａ自体が列車の通過時の振動や強風等によってネジ軸１に対して軸方向に振動乃至変形すると、図６に示すように下ナット２が被取付部材Ａの座面から浮き上がることがある。このように下ナット２が座面から浮いてしまうと、凸部２２と凹部３２との接触部側でネジ軸１とのハメアイの遊びの分だけ下ナット２が僅かにフランクに沿って図示左斜め上方に移動することが許容され、フランクが凹部３２内周面よりも水平に対する角度が小さいために凸部２２と凹部３２との接触部の押圧力が解除されることとなって、上記緩み止め作用が消失して緩みが生じることがあった。 However, when a hard lock nut is used for a net fence or the like installed along a railroad track, the attached member A itself such as a net fence with which the lower surface of the lower nut 2 abuts is subjected to vibrations, strong winds, etc. As a result of the vibration or deformation in the axial direction with respect to the screw shaft 1, the lower nut 2 may be lifted from the seating surface of the mounted member A as shown in FIG. When the lower nut 2 is thus lifted from the seating surface, the lower nut 2 is slightly left along the flank by the amount of play of the screw shaft 1 on the contact portion side of the convex portion 22 and the concave portion 32. Since the flank is allowed to move obliquely upward and the flank has a smaller angle with respect to the horizontal than the inner peripheral surface of the recess 32, the pressing force of the contact portion between the protrusion 22 and the recess 32 is released, and the loosening In some cases, the stopping action disappeared and loosening occurred.
この問題に対しては、従前より、図７に示すように、ある程度凸部２２と凹部３２とを嵌合させた状態で上下ナット２，３を一緒にネジ軸１に対して螺着していき（図７（ａ）参照）、下ナット２の下面を座面に当接させてから（図７（ｂ）参照）、まず下ナット２を所定の締め付けトルクで締結し、その後上ナット３を所定の締め付けトルクで締結する（図７（ｃ）参照）という施工法をユーザーに対して提案している。この施工法によれば、下ナット３がネジ軸１に対して僅かに偏心した状態で締結されるようになり、下ナット３が座面から浮いた状態となっても偏心嵌合による大きな緩み止め作用を維持できる。 To solve this problem, as shown in FIG. 7, the upper and lower nuts 2 and 3 are screwed together to the screw shaft 1 together with the convex portion 22 and the concave portion 32 fitted to some extent. After the bottom surface of the lower nut 2 is brought into contact with the seat surface (see FIG. 7B), the lower nut 2 is first fastened with a predetermined tightening torque, and then the upper nut 3 Is proposed to the user with a predetermined tightening torque (see FIG. 7C). According to this construction method, the lower nut 3 is fastened with a slight eccentricity with respect to the screw shaft 1, and even if the lower nut 3 is lifted from the seating surface, a large slack is caused by the eccentric fitting. The stopping action can be maintained.
しかしながら、かかる施工手順は手間であり、数百乃至数千ものナットを施工する必要がある場合には工期の長期化や施工コスト増を招くため、何らかの改善が要望されていた。 However, this construction procedure is laborious, and when several hundreds to thousands of nuts need to be constructed, the construction period is prolonged and the construction cost is increased, so some improvement has been demanded.
また、他の問題として、凸部２２と凹部３２との偏心嵌合により、周方向一部において凸部２２外周面と凹部３２内周面とが強く圧接されることとなるため、この圧接面に潤滑油を塗布せずに締結した場合に上記圧接部位に大きな摩擦熱が発生し、この摩擦熱によってナットを構成する金属材料が溶融して上ナット３と下ナット２とが溶着してしまうことがあった。 Another problem is that the outer peripheral surface of the convex portion 22 and the inner peripheral surface of the concave portion 32 are strongly pressed in part in the circumferential direction due to the eccentric fitting between the convex portion 22 and the concave portion 32. When this is fastened without applying lubricating oil, a large frictional heat is generated at the pressure contact portion, and the metal material constituting the nut is melted by this frictional heat, and the upper nut 3 and the lower nut 2 are welded. There was a thing.
そこで、本発明は、施工容易なものでありながら座面が不安定な場合においても緩みの発生しないハードロックナットを提供することを第１の目的とし、さらに加えて、上下ナットが締結時に溶着してしまうことを回避することを第２の目的とする。 Accordingly, a first object of the present invention is to provide a hard lock nut that is easy to construct but does not loosen even when the seating surface is unstable. In addition, the upper and lower nuts are welded at the time of fastening. The second object is to avoid this.
本発明は、上記目的を達成するために、次の技術的手段を講じた。 In order to achieve the above object, the present invention takes the following technical means.
即ち、本発明は、ボルトのネジ軸が螺合するネジ孔を有する下ナット及び上ナットからなり、これら上下ナットのネジ孔はネジ軸に対して僅かに遊びを有するよう形成され、上下ナットのいずれか一方には他方に向かって軸方向に突出する凸部が設けられ、上下ナットの他方には前記凸部が係合する内周面を有する凹部が形成され、前記凸部の周方向所定箇所が、前記ネジ軸に締結された下ナットに対して上ナットを締結していくにしたがって該上ナットをネジ軸に対して偏心させるように前記凹部の内周面に係合するよう構成された緩み止めナットにおいて、前記凸部の周方向所定箇所に突起部を設けたことを特徴とするものである。なお、突起部は、ナット構成材料（例えば金属材料）によって圧造等によりナットに一体成形することができる。 That is, the present invention is composed of a lower nut and an upper nut having screw holes into which the screw shafts of bolts are screwed, and the screw holes of these upper and lower nuts are formed to have a slight play with respect to the screw shafts. Either one is provided with a convex portion protruding in the axial direction toward the other, and the other of the upper and lower nuts is formed with a concave portion having an inner peripheral surface with which the convex portion is engaged, and the convex portion has a predetermined circumferential direction. The portion is configured to engage with the inner peripheral surface of the recess so that the upper nut is eccentric with respect to the screw shaft as the upper nut is fastened to the lower nut fastened to the screw shaft. The loosening prevention nut is characterized in that a protrusion is provided at a predetermined position in the circumferential direction of the protrusion. In addition, a projection part can be integrally formed in a nut by forging etc. with a nut constituent material (for example, metal material).
かかる本発明の緩み止めナットによれば、突起部が凹部内周面に係合することによって上下ナットを相対的に偏心させるものであるので、上ナットの締結によって突起部に大きな押圧力が作用すると、突起部の先端部が径方向内方に押圧変形され、これにより下ナットがネジ軸に対して同心状に締結されていても、上ナットの下面と下ナットの上面との間の隙間が殆どない状態まで上ナットを締結可能となる。したがって、下ナットが被取付部材から浮いても、上ナットによって下ナットを保持することが可能となり、座面が不安定な状況においても緩みの生じにくい締結構造を得ることができる。 According to such a locking nut of the present invention, since the protrusion is engaged with the inner peripheral surface of the recess, the upper and lower nuts are relatively eccentric, so that a large pressing force acts on the protrusion by fastening the upper nut. Then, even if the tip of the projection is pressed and deformed radially inward, and the lower nut is concentrically fastened to the screw shaft, the gap between the lower surface of the upper nut and the upper surface of the lower nut It is possible to fasten the upper nut until there is almost no. Therefore, even if the lower nut floats from the mounted member, it is possible to hold the lower nut by the upper nut, and it is possible to obtain a fastening structure that is less likely to loosen even when the seating surface is unstable.
上記本発明の緩み止めナットにおいて、前記突起部は、径方向外方に至るにしたがって先尖状に構成することができる。これによれば、突起部が径方向外方に向かって先尖状であるため、突起部の先端部が容易に押圧変形されるようになり、上記本発明の作用をより確実に生じさせることができる。また、突起部は、凸部の周方向複数箇所に設けることができ、より好ましくは凸部の周方向２箇所に設けることができる。これによれば、凸部と凹部との接触部位が周方向複数箇所となるため、下ナットに対して上ナットを締め付けるときに生じる摩擦熱を周方向複数箇所に分散させることができ、これにより偏心嵌合による圧接部位が溶着してしまうことを低減できる。 In the above-described locking nut according to the present invention, the protruding portion can be configured to have a pointed shape as it extends radially outward. According to this, since the protruding portion is pointed toward the outer side in the radial direction, the tip end portion of the protruding portion is easily pressed and deformed, and the operation of the present invention is more reliably generated. Can do. Further, the protrusions can be provided at a plurality of locations in the circumferential direction of the convex portion, and more preferably at two locations in the circumferential direction of the convex portion. According to this, since the contact part of a convex part and a crevice becomes a plurality of places in the peripheral direction, the frictional heat generated when tightening the upper nut with respect to the lower nut can be dispersed in a plurality of places in the circumferential direction. It can reduce that the press-contact part by eccentric fitting will weld.
また、前記突起部は、軸方向に長尺の断面山形状であって、且つ、その稜線が凸部の突出先端側に至るにしたがって径方向内方に傾斜するくさび状に構成されており、前記凹部の内周面は、前記突起部の稜線の傾斜に適合するテーパー面により構成されているものとすることができる。これによれば、凸部と凹部とが上記稜線で接触することで、下ナットに対して上ナットを締め付けるときに生じる摩擦熱を軸方向にも分散することができ、しかも突起部の先端部が変形することによって凸部と凹部とが線で接触することを保証できる。 Further, the protruding portion has a mountain-shaped cross section elongated in the axial direction, and is configured in a wedge shape whose ridgeline is inclined radially inward as it reaches the protruding tip side of the convex portion, The inner peripheral surface of the concave portion may be configured by a tapered surface that conforms to the inclination of the ridge line of the protrusion. According to this, since the convex part and the concave part are in contact with each other at the ridgeline, the frictional heat generated when the upper nut is tightened against the lower nut can be dispersed in the axial direction, and the tip part of the protrusion part By deforming, it can be ensured that the convex portion and the concave portion are in contact with each other by a line.
また、前記突起部は円錐状に構成され、前記凹部の内周面は、凹部の奥側に至るにしたがって小径となるテーパー面により構成することもできる。 Moreover, the said protrusion part is comprised conically, and the internal peripheral surface of the said recessed part can also be comprised by the taper surface which becomes a small diameter as it reaches the back | inner side of a recessed part.
本発明によれば、突起部を介して凸部と凹部とを接触させることにより、施工容易なものでありながら座面が不安定な場合においても緩みの発生しないハードロックナットを提供できる。また、突起部を周方向複数箇所に設けることにより、上下ナットが締結時に溶着してしまうことを低減できる。 According to the present invention, it is possible to provide a hard lock nut that does not loosen even when the seating surface is unstable while being easily constructed by bringing the convex portion and the concave portion into contact with each other via the protruding portion. Moreover, it can reduce that an upper and lower nut will weld at the time of a fastening by providing a projection part in the circumferential direction multiple places.
本発明の実施の形態を図面に基づいて説明するが、本発明の緩み止めナットの基本構成は図５に示す従来構造と同様であるので同符号を付してその説明を援用し、以下、本実施形態の特徴的構成について詳述する。 Embodiments of the present invention will be described with reference to the drawings. Since the basic structure of the locking nut of the present invention is the same as the conventional structure shown in FIG. The characteristic configuration of this embodiment will be described in detail.
図１及び図２は、本発明の一実施形態に係る緩み止めナット（緩み止め特殊ダブルナット）の下ナット２を示しており、本実施形態の下ナット２の凸部２２のテーパー状外周面はネジ孔２１と同心状に形成され、該凸部２２の外周面の周方向２箇所に径方向外方に先尖状に突出する突起部２３がナット構成材料（ＳＵＳなど）により一体成形されている。 1 and 2 show a lower nut 2 of a locking nut (a locking special double nut) according to an embodiment of the present invention, and a tapered outer peripheral surface of a convex portion 22 of the lower nut 2 of the present embodiment. Is formed concentrically with the screw hole 21, and projecting portions 23 projecting radially outwardly at two points on the outer peripheral surface of the convex portion 22 are integrally formed of a nut constituent material (SUS or the like). ing.
本実施形態の突起部２３は、凸部２２の軸方向全長にわたる長尺の断面山形状のリブにより構成され、この突起部２３の山形状の稜線が凸部２２の突出先端側に至るにしたがって径方向内方に傾斜するくさび状に構成されている。なお、図２には、従来のハードロックナットの凸ナットの凸部が仮想線で示されており、上記稜線は、従来のハードロックナットの凸部外周面上に位置する。すなわち、下ナット２をネジ軸１の軸心を中心として回転させたときの突起部２３の稜線の軌跡はテーパー面を描くとともに、該テーパー面は、後述する上ナット３の内周面よりも小径である。また、２つの突起部２３の稜線と、２つの突起部２３に対して径方向反対側の凸部２２の外周面の周方向一部とを包含するテーパー面は、上ナット３の凹部３２内周面とほぼ同一形状であるとともに、凹部３２内周面に対して偏心されている。 The projecting portion 23 of the present embodiment is configured by a long cross-section mountain-shaped rib extending over the entire length in the axial direction of the convex portion 22, and as the mountain-shaped ridge line of the projecting portion 23 reaches the projecting tip side of the convex portion 22. It is configured in a wedge shape inclined inward in the radial direction. In FIG. 2, the convex portion of the convex nut of the conventional hard lock nut is indicated by a virtual line, and the ridge line is located on the outer peripheral surface of the convex portion of the conventional hard lock nut. That is, when the lower nut 2 is rotated around the axis of the screw shaft 1, the locus of the ridge line of the projection 23 forms a tapered surface, and the tapered surface is more than the inner peripheral surface of the upper nut 3 described later. Small diameter. Further, the tapered surface including the ridge line of the two protruding portions 23 and a part of the outer peripheral surface of the protruding portion 22 on the opposite side in the radial direction with respect to the two protruding portions 23 is in the recessed portion 32 of the upper nut 3. It has substantially the same shape as the peripheral surface and is eccentric with respect to the inner peripheral surface of the recess 32.
なお、上ナットは従来のハードロックナットの凹ナットと同じ構成であってよく、該上ナットの凹部の内周面は、突起部２３の稜線の傾斜に適合するテーパー面（凹部の奥側に至るにしたがって小径となるテーパー面）とすることができる。 The upper nut may have the same configuration as the concave nut of the conventional hard lock nut, and the inner peripheral surface of the concave portion of the upper nut is a tapered surface (on the back side of the concave portion) adapted to the inclination of the ridge line of the protrusion 23. The taper surface becomes a smaller diameter as it reaches.
本実施形態によれば、ネジ軸１に対して同心状に装着された下ナット２に対して上ナット３を締結していくと、図３（ａ）に示すように、図５を用いて説明した従来技術と同様に下ナット２の上面と上ナット３の下面との間に比較的大きな隙間が空いた状態で上ナット３の凹部３２内周面が下ナット２の突起部２３に係合する。しかし、本実施形態では、突起部２３が先尖状に構成されているため、レンチなどの工具によって上ナット３を所定の締結トルクでさらに締結していくと、突起部２３の先端が潰れることで上ナット３をさらに螺進させていくことができ、図３（ｂ）に示すように上ナット３の下面が下ナット２の上面に当接する最終締結位置まで上ナット３を締結することができる。 According to the present embodiment, when the upper nut 3 is fastened to the lower nut 2 that is concentrically attached to the screw shaft 1, as shown in FIG. Similar to the conventional technology described above, the inner peripheral surface of the recess 32 of the upper nut 3 is engaged with the protrusion 23 of the lower nut 2 with a relatively large gap between the upper surface of the lower nut 2 and the lower surface of the upper nut 3. Match. However, in this embodiment, since the protrusion 23 is configured to have a pointed shape, when the upper nut 3 is further tightened with a predetermined tightening torque by a tool such as a wrench, the tip of the protrusion 23 is crushed. Thus, the upper nut 3 can be further screwed, and the upper nut 3 can be fastened to the final fastening position where the lower surface of the upper nut 3 contacts the upper surface of the lower nut 2 as shown in FIG. it can.
したがって、下ナット２が被取付部材Ａから浮き上がっても、凸部２２と凹部３２との偏心嵌合力は解除されず、緩みが発生することがない。また、上ナット３の下面が下ナット２の上面に当接する最終締結位置まで上ナット３を締結した場合は、下ナット２は被取付部材Ａから浮き上がる事無く良好な締結状態を維持できる。さらに、下ナット２の凸部２２と上ナット３の凹部３２との接触部位が周方向２箇所に分散されるため、これらの間に生じる摩擦熱も周方向２箇所に分散され、これにより上下ナット２，３が溶着してしまうことを低減できる。 Therefore, even if the lower nut 2 is lifted from the mounted member A, the eccentric fitting force between the convex portion 22 and the concave portion 32 is not released, and no loosening occurs. Further, when the upper nut 3 is fastened to the final fastening position where the lower surface of the upper nut 3 comes into contact with the upper surface of the lower nut 2, the lower nut 2 can maintain a good fastening state without being lifted from the mounted member A. Furthermore, since the contact portion between the convex portion 22 of the lower nut 2 and the concave portion 32 of the upper nut 3 is dispersed in two circumferential directions, the frictional heat generated between them is also dispersed in two circumferential directions, thereby The welding of the nuts 2 and 3 can be reduced.
本発明は上記実施形態に限定されるものではなく、適宜設計変更できる。例えば、突起部は、図４に示すように円錐状の先尖状の突起により構成することもできる。また、突起部の数は１つでもよく、３つ以上でもよい。また、凸部を上ナットの下面に設け、凹部を下ナットの上面に設けることもできる。また、突起部は必ずしも先尖状でなくともよく、凸部と凹部との偏心嵌合力によって先端部が押圧変形される適宜の形状乃至構造であってよい。 The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, the projecting portion can be configured by a conical tip-shaped projection as shown in FIG. Further, the number of protrusions may be one, or three or more. Moreover, a convex part can be provided in the lower surface of an upper nut, and a recessed part can also be provided in the upper surface of a lower nut. Further, the protrusion does not necessarily have a pointed shape, and may have an appropriate shape or structure in which the tip is pressed and deformed by the eccentric fitting force between the convex and the concave.
Claims (6)
前記凸部の周方向所定箇所に、突起部が設けられていることを特徴とする緩み止めナット。 It consists of a lower nut and an upper nut having screw holes into which the screw shafts of the bolts are screwed. These screw holes of the upper and lower nuts are formed so as to have a slight play with respect to the screw shaft, and either one of the upper and lower nuts has the other A convex portion projecting in the axial direction toward the upper and lower nuts is formed, and a concave portion having an inner peripheral surface with which the convex portion engages is formed on the other of the upper and lower nuts. In the locking nut configured to engage with the inner peripheral surface of the recess so that the upper nut is eccentric with respect to the screw shaft as the upper nut is tightened with respect to the lower nut fastened to
A loosening prevention nut characterized in that a protrusion is provided at a predetermined position in the circumferential direction of the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015022792A JP6427022B2 (en) | 2015-02-09 | 2015-02-09 | Locking nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015022792A JP6427022B2 (en) | 2015-02-09 | 2015-02-09 | Locking nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016145607A true JP2016145607A (en) | 2016-08-12 |
| JP6427022B2 JP6427022B2 (en) | 2018-11-21 |
Family
ID=56685439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015022792A Active JP6427022B2 (en) | 2015-02-09 | 2015-02-09 | Locking nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6427022B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018180737A1 (en) * | 2017-03-27 | 2018-10-04 | 株式会社ＮｅｊｉＬａｗ | Relative rotation prevention structure for screw, relative movement prevention structure, and relative movement prevention body |
| JP2018189224A (en) * | 2017-03-27 | 2018-11-29 | 株式会社ＮｅｊｉＬａｗ | Relative rotation suppression structure, relative movement suppression structure and relative movement suppression body of screw body |
| WO2018221501A1 (en) | 2017-05-29 | 2018-12-06 | 宝輝 山下 | Nut and fastening method |
| CN114867947A (en) * | 2019-12-20 | 2022-08-05 | 哈得螺克工业株式会社 | Anti-loosening device |
| CN115921077A (en) * | 2022-12-20 | 2023-04-07 | 华能吉林发电有限公司九台电厂 | A protection fixed knot constructs for crushing equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873114B (en) * | 2019-12-06 | 2021-03-19 | 荆门市佰思机械科技有限公司 | Sliding buckle type locknut |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215612U (en) * | 1985-07-12 | 1987-01-30 | ||
| JP2008014402A (en) * | 2006-07-05 | 2008-01-24 | Hard Lock Industry Co Ltd | Bolt locking device |
-
2015
- 2015-02-09 JP JP2015022792A patent/JP6427022B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215612U (en) * | 1985-07-12 | 1987-01-30 | ||
| JP2008014402A (en) * | 2006-07-05 | 2008-01-24 | Hard Lock Industry Co Ltd | Bolt locking device |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7249065B2 (en) | 2017-03-27 | 2023-03-30 | 株式会社NejiLaw | Relative rotation suppression structure |
| JP2018189224A (en) * | 2017-03-27 | 2018-11-29 | 株式会社ＮｅｊｉＬａｗ | Relative rotation suppression structure, relative movement suppression structure and relative movement suppression body of screw body |
| US12135054B2 (en) | 2017-03-27 | 2024-11-05 | NejiLaw inc. | Relative rotation prevention structure for screw, relative movement prevention structure, and relative movement prevention body |
| KR102644894B1 (en) * | 2017-03-27 | 2024-03-08 | 가부시키가이샤 네지로 | Screw body relative rotation suppression structure, relative movement suppression structure, relative movement suppression body |
| KR20190128180A (en) * | 2017-03-27 | 2019-11-15 | 가부시키가이샤 네지로 | Relative rotation suppression structure, relative movement suppression structure, relative movement suppressor of the screw body |
| JP2021185327A (en) * | 2017-03-27 | 2021-12-09 | 株式会社NejiLaw | Relative displacement suppression structure |
| JP7014395B2 (en) | 2017-03-27 | 2022-02-15 | 株式会社NejiLaw | Relative rotation suppression structure, relative movement suppression structure, relative movement suppression body of screw body |
| JP2022036211A (en) * | 2017-03-27 | 2022-03-04 | 株式会社NejiLaw | Relative rotation restriction structure |
| WO2018180737A1 (en) * | 2017-03-27 | 2018-10-04 | 株式会社ＮｅｊｉＬａｗ | Relative rotation prevention structure for screw, relative movement prevention structure, and relative movement prevention body |
| JP7241431B2 (en) | 2017-03-27 | 2023-03-17 | 株式会社NejiLaw | Relative displacement control structure |
| EP4202240A1 (en) | 2017-05-29 | 2023-06-28 | Tomoki Yamashita | Pair nut and tightening method therefor |
| JP2018204795A (en) * | 2017-05-29 | 2018-12-27 | 宝輝 山下 | Nut and fastening method |
| US12085110B2 (en) | 2017-05-29 | 2024-09-10 | Tomoki Yamashita | Nut and tightening method |
| WO2018221501A1 (en) | 2017-05-29 | 2018-12-06 | 宝輝 山下 | Nut and fastening method |
| CN114867947A (en) * | 2019-12-20 | 2022-08-05 | 哈得螺克工业株式会社 | Anti-loosening device |
| CN115921077A (en) * | 2022-12-20 | 2023-04-07 | 华能吉林发电有限公司九台电厂 | A protection fixed knot constructs for crushing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6427022B2 (en) | 2018-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2016145607A (en) | Retention nut | |
| JP3733534B2 (en) | Locking fastener | |
| JP6437313B2 (en) | Locking special double nut | |
| TWI400394B (en) | Fastening members and fastening structures | |
| JP3914975B2 (en) | Lock nut | |
| JP5336644B1 (en) | Screw body reverse rotation prevention structure | |
| US20170184144A1 (en) | Washer for preventing loosening | |
| JP3234710U (en) | Anti-vibration nut kit | |
| JP6757101B2 (en) | Loosening prevention fastening structure | |
| JP2015203492A (en) | Lock nut | |
| JP6892046B2 (en) | Fastening member | |
| JP4385307B1 (en) | Wedge lock cap bolt | |
| JP2016133136A (en) | Special double nut for looseness prevention | |
| US12098742B2 (en) | Non-loosening bolt | |
| JP7016204B2 (en) | Loosening prevention fastening structure | |
| JP4519045B2 (en) | Screw locking structure | |
| JP6039515B2 (en) | Screw body reverse rotation prevention structure | |
| JP3199619U (en) | Locking nut | |
| JP3113151U (en) | Locking fastener | |
| US1137433A (en) | Boiler stay-bolt. | |
| JP6421307B2 (en) | Screw body reverse rotation prevention structure | |
| JP4837963B2 (en) | Screw locking structure | |
| JP6529671B2 (en) | Locking prevention nut and fastening method | |
| JP5794749B1 (en) | Wedge fixing nut | |
| JP3239026U (en) | Bolt nut system with anti-loosening effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20170727 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20171030 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20180824 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180911 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181009 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20181023 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20181026 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6427022 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |