JP6529671B2 - Locking prevention nut and fastening method - Google Patents

Locking prevention nut and fastening method Download PDF

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JP6529671B2
JP6529671B2 JP2018520288A JP2018520288A JP6529671B2 JP 6529671 B2 JP6529671 B2 JP 6529671B2 JP 2018520288 A JP2018520288 A JP 2018520288A JP 2018520288 A JP2018520288 A JP 2018520288A JP 6529671 B2 JP6529671 B2 JP 6529671B2
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hole
thread
loosening prevention
diameter
prevention nut
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JPWO2017208401A1 (en
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征克 福田
征克 福田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/22Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30Locking exclusively by special shape of the screw-thread

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Dowels (AREA)

Description

本発明は、ボルトなどの相手部材に締め付けられ、振動などで生じる戻り回転による緩みが防止される緩み防止ナットおよび締結方法に関する。   BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a loosening prevention nut and a fastening method, which are tightened on a mating member such as a bolt and prevented from loosening due to return rotation caused by vibration or the like.

従来、種々の建築部材あるいは機械部品を固定するために、締結部品としてボルトおよびナットが用いられる。締結部品として用いられるボルトおよびナットは、被締結部品の振動あるいは回転による滑りを起因としてナットが戻り方向に回転することがある。このため、ナットに戻り回転による緩みが発生し、締結効果の低下が問題となる。   Conventionally, bolts and nuts are used as fasteners to secure various building components or machine parts. In bolts and nuts used as fastening parts, the nuts may rotate in the return direction due to slippage due to vibration or rotation of the parts to be fastened. As a result, the nut returns and loosens due to rotation, which causes a problem of reduction in the fastening effect.

この戻り回転による緩みを防止するため、種々のボルトおよびナットの構造が提案されている(特許文献1、2参照)。   In order to prevent the looseness due to the return rotation, various bolt and nut structures have been proposed (see Patent Documents 1 and 2).

たとえば、特許文献1に記載の技術では、ナットをボルトに締め付ける際にナットの座面に形成した突起の先端がボルトの雄ネジ部へ食いつく。そして、雄ネジ部に食いついた突起が潰れて、ボルトの雄ネジ部へ巻き込まれる摩擦力の上昇で緩み止め効果が高められている。   For example, in the technique described in Patent Document 1, when the nut is tightened to a bolt, the tip of a projection formed on the bearing surface of the nut bites into the male screw portion of the bolt. And the protrusion which bited in the external thread part is crushed, and the locking effect is heightened by the rise of the frictional force taken in by the external thread part of a bolt.

また、特許文献2に記載の技術では、ナットの雌ネジ部の一部がボルトの雄ネジ部の破壊部により破壊される。これにより、ボルトにねじ込まれたナットが緩まない構造となっている。   Further, in the technique described in Patent Document 2, a part of the female screw part of the nut is broken by the broken part of the male screw part of the bolt. Thus, the nut screwed into the bolt does not come loose.

特開平11−315820号公報JP-A-11-315820 特開昭62−86409号公報Japanese Patent Application Laid-Open No. 62-86409

特許文献1に記載の技術では、ナットの一部が変形し、螺合するボルトに対する摩擦力の向上に寄与することで緩み防止を図っている。しかし、飽くまでも摩擦力の向上が手法として用いられている。このため、被締結部材が振動を受けることによるまたは被締結部材が回転するなどをした場合に、締結部の滑りを起因とした戻り回転による緩みが防止できない。   In the technique described in Patent Document 1, a part of the nut is deformed to contribute to the improvement of the frictional force with respect to the bolt to be screwed, thereby preventing the loosening. However, the improvement of the frictional force is used as a method until it gets tired. For this reason, when a to-be-fastened member receives a vibration, or when a to-be-fastened member rotates etc., the loosening by the return rotation which made the slip of a fastening part a cause can not be prevented.

特許文献2に記載の技術では、ボルトの雄ネジ部に破壊部を有し、ナットの雌ネジ部の一部を破壊することにより緩みを防止する。しかし、ボルトが雄ネジ部を有するナットの緩みを改善し得る構造ではない。   In the technique described in Patent Document 2, the external thread portion of the bolt has a breaking portion, and loosening is prevented by breaking a portion of the internal thread portion of the nut. However, the bolt is not a structure that can improve the loosening of a nut having an external thread.

本発明は、上記課題を解決するためのものであり、より強固にナットの戻り回転による緩みを防止する緩み防止ナットおよび締結方法を提供することを目的とする。   The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a loosening preventing nut and a fastening method which more securely prevent loosening due to return rotation of the nut.

本発明に係る緩み防止ナットは、一方の端面に開口した開口部から連続し、相手部材の雄ネジ部に螺合する雌ネジ部と、他方の端面に開口した開口部から連続し、前記相手部材の雄ネジ部の雄ネジ外径よりも小径であり、かつ、雄ネジ谷径より大径である孔部と、を備え、前記相手部材に対して前記雌ネジ部側から取り付けられ、螺合される前記相手部材に対して締め付け回転する際に、前記相手部材の雄ネジ部のネジ山を前記孔部で塑性変形させるものである。 The loosening prevention nut according to the present invention is continuous from the opening opened at one end face, and is continuous from the female screw portion screwed with the external thread of the mating member and the opening opened at the other end face, A hole having a diameter smaller than the external diameter of the external thread of the external thread of the member and larger than the diameter of the external thread valley, and attached from the side of the internal thread to the mating member The screw thread of the male screw portion of the mating member is plastically deformed at the hole portion when it is tightened and rotated with respect to the mating member to be engaged .

本発明に係る締結方法は、一方の端面に開口した開口部から連続し、相手部材の雄ネジ部に螺合する雌ネジ部と、他方の端面に開口した開口部から連続し、前記相手部材の雄ネジ部の雄ネジ外径よりも小径であり、かつ、雄ネジ谷径より大径である孔部と、を備えた緩み防止ナットを、前記相手部材に対して前記雌ネジ部側から取り付け、螺合される前記相手部材に対して締め付け回転する際に、前記相手部材の雄ネジ部のネジ山を前記孔部で塑性変形させるものである。   In the fastening method according to the present invention, the mating member is continuous from the opening opened at one end face, and is continuous from the female screw portion screwed to the male screw portion of the mating member and the opening opened at the other end face And a hole having a diameter smaller than the external diameter of the external thread of the external thread and a diameter larger than the diameter of the external thread from the side of the internal thread relative to the counter member. The screw thread of the male screw portion of the mating member is plastically deformed at the hole when the screw is tightened and rotated with respect to the mating member to be attached and screwed.

本発明に係る緩み防止ナットおよび締結方法によれば、雌ネジ部と、孔部と、を備えた緩み防止ナットを、相手部材に対して雌ネジ部側から取り付け、螺合される相手部材に対して締め付け回転する際に、相手部材の雄ネジ部のネジ山を孔部で塑性変形させる。塑性変形した雄ネジ部は、緩み防止ナットの雌ネジ部に螺合しない。このため、緩み防止ナットは、塑性変形した雄ネジ部の後退方向に戻り回転しない。したがって、緩み防止ナットは、戻り回転による緩みがより強固に防止できる。   According to the loosening prevention nut and the fastening method of the present invention, the loosening prevention nut having the female screw portion and the hole portion is attached to the mating member from the female screw portion side, and is screwed onto the mating member At the time of tightening and rotating, the thread of the male screw of the mating member is plastically deformed at the hole. The plastically deformed external thread does not screw into the internal thread of the loosening prevention nut. For this reason, the loosening prevention nut does not rotate back in the backward direction of the plastically deformed external thread. Therefore, the loosening prevention nut can prevent the loosening due to the return rotation more firmly.

本発明の実施の形態1に係る緩み防止ナットを示す断面図である。It is sectional drawing which shows the loosening prevention nut which concerns on Embodiment 1 of this invention. 本発明の実施の形態1に係る緩み防止ナットがボルトに締め付けられる状態を示す図である。It is a figure which shows the state by which the loosening prevention nut which concerns on Embodiment 1 of this invention is tightened to a volt | bolt. 本発明の実施の形態1に係る緩み防止ナットの雌ネジ部がボルトの雄ネジ部に螺合する状態を示す図である。It is a figure which shows the state which the internal thread part of the loosening prevention nut which concerns on Embodiment 1 of this invention screw-engages with the external thread part of a volt | bolt. 本発明の実施の形態1に係る緩み防止ナットの孔部がボルトの雄ネジ部を塑性変形させる状態を示す図である。It is a figure which shows the state which the hole part of the loosening prevention nut which concerns on Embodiment 1 of this invention plastically deforms the external thread part of a volt | bolt. 本発明の実施の形態1に係るボルトの雄ネジ部を示す一部展開図である。It is a partially expanded view which shows the external thread part of the volt | bolt which concerns on Embodiment 1 of this invention. 本発明の実施の形態1に係るボルトの雄ネジ部が塑性変形した境界を示す一部展開図である。It is a partially developed view which shows the boundary which the external thread part of the volt | bolt based on Embodiment 1 of this invention plastically deformed. 本発明の実施の形態2に係る緩み防止ナットを示す断面図である。It is sectional drawing which shows the loosening prevention nut which concerns on Embodiment 2 of this invention.

以下、図面に基づいて本発明の実施の形態について説明する。
なお、各図において、同一の符号を付したものは、同一のまたはこれに相当するものであり、これは明細書の全文において共通している。
さらに、明細書全文に示されている構成要素の形態は、あくまで例示であってこれらの記載に限定されるものではない。
Hereinafter, embodiments of the present invention will be described based on the drawings.
In the drawings, the same reference numerals denote the same or corresponding parts, which are common to the whole text of the specification.
Furthermore, the form of the component shown in the specification full text is an illustration to the last, and is not limited to these descriptions.

実施の形態1.
本発明の実施の形態1に係る緩み防止ナット100について説明する。
図1は、本発明の実施の形態1に係る緩み防止ナット100を示す断面図である。図2は、本発明の実施の形態1に係る緩み防止ナット100がボルト40に締め付けられる状態を示す図である。
図1に示す緩み防止ナット100は、雌ネジ部20と、孔部30と、を備えている。
緩み防止ナット100は、6角、8角あるいは4角などの一般的な外形形状である。
Embodiment 1
A loosening prevention nut 100 according to a first embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view showing a loosening prevention nut 100 according to a first embodiment of the present invention. FIG. 2 is a view showing a state in which the loosening prevention nut 100 according to Embodiment 1 of the present invention is tightened to the bolt 40. As shown in FIG.
The loosening prevention nut 100 shown in FIG. 1 includes a female screw 20 and a hole 30.
The loosening prevention nut 100 has a general outer shape such as a hexagonal, octagonal or tetragonal shape.

図2に示すように、雌ネジ部20は、相手部材であるボルト40に取り付けられる側の一方の端面21に開口した開口部から連続し、ボルト40の雄ネジ部41に螺合する。雌ネジ部20には、所定のリード角およびピッチに従ったひっかかり高さのネジ山22が形成されている。   As shown in FIG. 2, the female screw portion 20 is continuous from an opening opened in one end face 21 of the side attached to the bolt 40 which is a mating member, and is screwed into the male screw portion 41 of the bolt 40. The female screw portion 20 is formed with a thread 22 having a hook height according to a predetermined lead angle and pitch.

孔部30は、ボルト40に取り付けられる側とは反対側の他方の端面31に開口した開口部から連続している。孔部30の孔径は、ボルト40の雄ネジ部41の雄ネジ外径42よりも小径であり、かつ、雄ネジ谷径43より大径である。
具体的には、孔部30は、ボルト40の雄ネジ部41のネジ山44を塑性変形させてボルト40の雄ネジ部41のネジ溝45が埋まり、外周面46となるボルト40の雄ネジ部41を雌ネジ部20の内径23よりも大径に構成する孔径である。
孔部30の孔径は、同一の中心線で軸方向に延びる同一な孔径寸法である。
The hole 30 is continuous from an opening opened at the other end face 31 opposite to the side attached to the bolt 40. The hole diameter of the hole 30 is smaller than the external diameter 42 of the external thread of the external thread 41 of the bolt 40 and larger than the external diameter 43 of the external thread.
Specifically, the hole 30 plastically deforms the screw thread 44 of the male screw portion 41 of the bolt 40 so that the screw groove 45 of the male screw portion 41 of the bolt 40 is embedded, and the male screw of the bolt 40 becomes the outer peripheral surface 46 The hole diameter is such that the portion 41 has a diameter larger than the inner diameter 23 of the female screw portion 20.
The hole diameter of the holes 30 is the same hole diameter dimension extending in the axial direction at the same center line.

雌ネジ部20と孔部30とは、軸方向に延びる中心線が一致している。また、雌ネジ部20と孔部30とは、緩み防止ナット100の内部で直接的に連続して形成されている。   The female screw portion 20 and the hole 30 have a center line extending in the axial direction coincident with each other. Further, the female screw portion 20 and the hole portion 30 are directly and continuously formed inside the loosening prevention nut 100.

以上のような構成の緩み防止ナット100は、締め付け回転方向とは反対方向である後退方向に、雌ネジ部20に連続して孔部30を有する。孔部30は、緩み防止ナット100が締め付け回転方向に回転させられると、ボルト40の雄ネジ部41のネジ山44を潰して緩み防止ナット100の雌ネジ部20と螺合しない形に塑性変形させる。
緩み防止ナット100は、雌ネジ部20に連続して孔部30を有する。このため、緩み防止ナット100がユーザーによって冶具を用いて締め付け回転方向に回転させられるときに、孔部30がボルト40の雄ネジ部41のネジ山44を塑性変形させるために大きな力が必要である。しかし、ユーザーが大きな力でボルト40の雄ネジ部41のネジ山44を塑性変形させると、ボルト40の雄ネジ部41の塑性変形された箇所は、再度の変形がし難い。
The loosening prevention nut 100 configured as described above has the hole 30 continuously with the female screw 20 in the reverse direction opposite to the tightening and rotating direction. When the loosening prevention nut 100 is tightened and rotated in the rotational direction, the hole 30 squeezes the screw thread 44 of the male screw 41 of the bolt 40 and does not screw with the female screw 20 of the loosening prevention nut 100 Let
The loosening prevention nut 100 has a hole 30 continuous with the female screw 20. For this reason, when the loosening prevention nut 100 is tightened and rotated in the tightening rotational direction by the user using a jig, a large force is necessary for the hole 30 to plastically deform the screw thread 44 of the male screw portion 41 of the bolt 40 is there. However, when the user plastically deforms the thread 44 of the male screw portion 41 of the bolt 40 with a large force, the plastically deformed portion of the male screw portion 41 of the bolt 40 is difficult to deform again.

図3は、本発明の実施の形態1に係る緩み防止ナットの雌ネジ部がボルトの雄ネジ部に螺合する状態を示す図である。図4は、本発明の実施の形態1に係る緩み防止ナットの孔部がボルトの雄ネジ部を塑性変形させる状態を示す図である。   FIG. 3 is a view showing a state in which the female screw portion of the loosening prevention nut according to the first embodiment of the present invention is screwed to the male screw portion of the bolt. FIG. 4 is a view showing a state in which the hole portion of the loosening prevention nut according to the first embodiment of the present invention plastically deforms the male screw portion of the bolt.

まず、図2に示すように、被締結部材50の取付孔51を挿通して上向きに突出した雄ネジ部41を有するボルト40に対して、緩み防止ナット100の一方の端面21に開口した雌ネジ部20が螺合される。   First, as shown in FIG. 2, a female member opened at one end face 21 of the loosening prevention nut 100 with respect to the bolt 40 having a male screw portion 41 which protrudes upward through the mounting hole 51 of the member 50 to be fastened. The screw portion 20 is screwed.

次に、緩み防止ナット100がユーザーによって冶具を用いて締め付け回転方向に回転させられ、被締結部材50側に進行する。図3に示すように、緩み防止ナット100がボルト40に螺合させられて行くと、緩み防止ナット100の孔部30がボルト40の雄ネジ部41の先端に接触する。   Next, the loosening prevention nut 100 is tightened and rotated in the tightening and rotating direction by the user using a jig, and advances toward the to-be-fastened member 50 side. As shown in FIG. 3, when the loosening prevention nut 100 is screwed into the bolt 40, the hole 30 of the loosening prevention nut 100 contacts the tip of the male screw portion 41 of the bolt 40.

緩み防止ナット100が更に締め付けられると、緩み防止ナット100の孔部30は塑性変形せずに締め付け回転方向に進もうとする。このとき、緩み防止ナット100の孔部30の孔径は、螺合されるボルト40の雄ネジ部41の雄ネジ外径42よりも小径である。このため、図4に示すように、孔部30は、ボルト40の雄ネジ部41のネジ山44をネジ溝45に埋め込む形で塑性変形させる。塑性変形したボルト40の雄ネジ部41の外周面46の外径は、緩み防止ナット100の孔部30の孔径とほぼ一致する。   When the anti-loosening nut 100 is further tightened, the hole 30 of the anti-loosening nut 100 does not deform plastically and tries to move in the rotational direction. At this time, the hole diameter of the hole 30 of the loosening prevention nut 100 is smaller than the outer diameter 42 of the male screw 41 of the bolt 40 to be screwed. Therefore, as shown in FIG. 4, the hole 30 plastically deforms the thread 44 of the male screw 41 of the bolt 40 so as to be embedded in the screw groove 45. The outer diameter of the outer circumferential surface 46 of the externally threaded portion 41 of the plastically deformed bolt 40 substantially matches the hole diameter of the hole 30 of the loosening prevention nut 100.

図5は、本発明の実施の形態1に係るボルト40の雄ネジ部41を示す一部展開図である。図6は、本発明の実施の形態1に係るボルト40の雄ネジ部41が塑性変形した境界47を示す一部展開図である。   FIG. 5 is a partially developed view showing the male screw portion 41 of the bolt 40 according to the first embodiment of the present invention. FIG. 6 is a partially developed view showing a boundary 47 where the external thread portion 41 of the bolt 40 according to Embodiment 1 of the present invention is plastically deformed.

図5に示すように、塑性変形前は、ボルト40の雄ネジ部41のネジ山44とネジ溝45とが緩み防止ナット100の雌ネジ部20に螺合できるように明確に分かれている。   As shown in FIG. 5, before plastic deformation, the screw thread 44 and the screw groove 45 of the male screw portion 41 of the bolt 40 are clearly separated so that they can be screwed to the female screw portion 20 of the loosening prevention nut 100.

一方、図6に示すように、緩み防止ナット100が締め付け回転方向に進行し、孔部30がボルト40の雄ネジ部41のネジ山44を塑性変形させると、ボルト40の雄ネジ部41のネジ山44とネジ溝45とがほぼ一定の径寸法の外周面46になる。つまり、図4に示す図示矢印のように、緩み防止ナット100の孔部30が通過して塑性変形したボルト40の雄ネジ部41のネジ溝45は、塑性変形したネジ山44に埋められる。このため、緩み防止ナット100の雌ネジ部20は、塑性変形したボルト40の雄ネジ部41とは螺合できなくなる。   On the other hand, as shown in FIG. 6, when the loosening prevention nut 100 advances in the tightening and rotating direction and the hole 30 plastically deforms the thread 44 of the male screw 41 of the bolt 40, the male screw 41 of the bolt 40 is The screw thread 44 and the screw groove 45 form an outer circumferential surface 46 of substantially constant diameter. That is, as shown by the arrows in FIG. 4, the thread groove 45 of the male screw portion 41 of the bolt 40 which is plastically deformed by passing through the hole 30 of the loosening prevention nut 100 is buried in the plastically deformed thread 44. Therefore, the female screw portion 20 of the loosening prevention nut 100 can not be screwed with the male screw portion 41 of the plastically deformed bolt 40.

このように、緩み防止ナット100が締め付けられた後では、緩み防止ナット100の雌ネジ部20とボルト40の塑性変形された部位である外周面46は噛み合わない。このため、緩み防止ナット100は、ボルト40の締め付け回転方向とは反対方向へ戻り回転することができない。つまり、被締結部材50が振動を受けることによる、または回転するなどをした場合の締結部の滑りを受ける場合にも緩み防止ナット100は、戻り回転による緩みを起こさない。   Thus, after the loosening prevention nut 100 is tightened, the female screw portion 20 of the loosening prevention nut 100 and the outer peripheral surface 46 which is a portion of the plastically deformed bolt 40 do not engage with each other. Therefore, the loosening prevention nut 100 can not return and rotate in the direction opposite to the tightening rotational direction of the bolt 40. That is, the loosening prevention nut 100 does not cause loosening due to return rotation even when receiving slippage of the fastening portion due to vibration or rotation of the member 50 to be fastened.

また、ボルト40の塑性変形された外周面46が戻り回転による緩み方向に変形しようとしても、ボルト40の塑性変形された部分がその境界47の箇所から連続している。そのため、緩み防止ナット100の戻り回転による緩みは、ボルト40の連続する塑性変形された外周面46によって強固に阻止される。あるいは、境界47から外周面46の一部が変形しても、外周面46がその部分から連続する。これにより、緩み防止ナット100の戻り回転による緩みは、最小限に制限される。したがって、緩み防止ナット100の戻り回転による緩みが悪化することが防止できる。   Further, even if the plastically deformed outer peripheral surface 46 of the bolt 40 tries to deform in the loosening direction due to the return rotation, the plastically deformed portion of the bolt 40 is continuous from the location of the boundary 47. Therefore, the looseness due to the return rotation of the loosening prevention nut 100 is firmly prevented by the continuous plastically deformed outer peripheral surface 46 of the bolt 40. Alternatively, even if a part of the outer peripheral surface 46 is deformed from the boundary 47, the outer peripheral surface 46 continues from that part. Thereby, the loosening due to the return rotation of the anti-loosening nut 100 is limited to a minimum. Therefore, it is possible to prevent the loosening due to the return rotation of the loosening prevention nut 100 from becoming worse.

実施の形態1によれば、緩み防止ナット100は、一方の端面21に開口した開口部から連続し、ボルト40の雄ネジ部41に螺合する雌ネジ部20を備えている。緩み防止ナット100は、他方の端面31に開口した開口部から連続し、ボルト40の雄ネジ部41の雄ネジ外径42よりも小径な孔部30を備えている。
この構成によれば、雌ネジ部20と、孔部30と、を備えた緩み防止ナット100を、ボルト40に対して雌ネジ部20側から取り付け、螺合されるボルト40に対して締め付け回転する際に、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させる。塑性変形した雄ネジ部41は、緩み防止ナット100の雌ネジ部20に螺合しない。このため、緩み防止ナット100は、塑性変形した雄ネジ部41の後退方向に戻り回転しない。したがって、緩み防止ナット100は、戻り回転による緩みがより強固に防止できる。
According to the first embodiment, the loosening prevention nut 100 is provided with the female screw portion 20 which is continuous from the opening portion opened at the one end face 21 and which is screwed to the male screw portion 41 of the bolt 40. The loosening prevention nut 100 is continuous with an opening opened at the other end face 31 and includes a hole 30 having a diameter smaller than the external thread diameter 42 of the external thread 41 of the bolt 40.
According to this configuration, the loosening prevention nut 100 having the female screw portion 20 and the hole portion 30 is attached to the bolt 40 from the female screw portion 20 side, and is tightened and rotated with respect to the screw 40 to be screwed At this time, the thread 44 of the male screw 41 of the bolt 40 is plastically deformed at the hole 30. The plastically deformed external thread portion 41 is not screwed into the internal thread portion 20 of the loosening prevention nut 100. For this reason, the loosening prevention nut 100 does not rotate back in the backward direction of the plastically deformed external thread portion 41. Therefore, the loosening prevention nut 100 can prevent the loosening due to the return rotation more firmly.

雌ネジ部20と孔部30とは、中心線が一致している。
この構成によれば、緩み防止ナット100が螺合されるボルト40に対して締め付け回転する際に、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させることができる。
The centerline of the female screw 20 and the hole 30 coincide with each other.
According to this configuration, when the loosening prevention nut 100 is tightened and rotated with respect to the bolt 40 to be screwed, the thread 44 of the male screw portion 41 of the bolt 40 can be plastically deformed in the hole 30.

雌ネジ部20と孔部30とは、連続して形成されている。
この構成によれば、緩み防止ナット100がユーザーによって冶具を用いて締め付け回転方向に回転させられるときにボルト40の雄ネジ部41が孔部30に入っていくのに大きな力が必要である。しかし、ユーザーが大きな力でボルト40の雄ネジ部41のネジ山44を塑性変形させると、塑性変形された箇所は、再度の変形がし難い。したがって、緩み防止ナット100は、戻り回転による緩みがより強固に防止できる。
The female screw 20 and the hole 30 are formed continuously.
According to this configuration, a large force is required for the male screw 41 of the bolt 40 to enter the hole 30 when the loosening prevention nut 100 is tightened and rotated by the user using a jig. However, when the user plastically deforms the thread 44 of the male screw portion 41 of the bolt 40 with a large force, it is difficult for the plastically deformed portion to be deformed again. Therefore, the loosening prevention nut 100 can prevent the loosening due to the return rotation more firmly.

緩み防止ナット100は、ボルト40に対して雌ネジ部20側から取り付けられ、螺合されるボルト40に対して締め付け回転する際に、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させる。
この構成によれば、塑性変形した雄ネジ部41は、緩み防止ナット100の雌ネジ部20に螺合しない。このため、緩み防止ナット100は、塑性変形した雄ネジ部41の後退方向に戻り回転しない。したがって、緩み防止ナット100は、戻り回転による緩みがより強固に防止できる。
The loosening prevention nut 100 is attached to the bolt 40 from the female screw 20 side, and when it is tightened and rotated with respect to the screw 40 to be screwed, the screw thread 44 of the male screw 41 of the bolt 40 Plastically deform.
According to this configuration, the plastically deformed external thread portion 41 is not screwed into the internal thread portion 20 of the loosening prevention nut 100. For this reason, the loosening prevention nut 100 does not rotate back in the backward direction of the plastically deformed external thread portion 41. Therefore, the loosening prevention nut 100 can prevent the loosening due to the return rotation more firmly.

孔部30は、ボルト40の雄ネジ部41のネジ山44を塑性変形させてボルト40の雄ネジ部41のネジ溝45が埋まり、ボルト40の雄ネジ部41を雌ネジ部20の内径23よりも大径に構成する孔径である。
この構成によれば、塑性変形した雄ネジ部41は、緩み防止ナット100の雌ネジ部20に螺合しない外周面46となった外径寸法に変形する。
In the hole 30, the thread 44 of the male screw 41 of the bolt 40 is plastically deformed so that the screw groove 45 of the male screw 41 of the bolt 40 is embedded, and the male screw 41 of the bolt 40 becomes the inner diameter 23 of the female screw 20. It is a hole diameter configured to be larger than the diameter.
According to this configuration, the plastically deformed external thread portion 41 is deformed to the outer diameter dimension which is the outer peripheral surface 46 which is not screwed to the internal thread portion 20 of the loosening prevention nut 100.

緩み防止ナット100は、一方の端面21に開口した開口部から連続し、ボルト40の雄ネジ部41に螺合する雌ネジ部20を備えている。緩み防止ナット100は、他方の端面31に開口した開口部から連続し、ボルト40の雄ネジ部41の雄ネジ外径42よりも小径な孔部30を備えている。締結方法は、緩み防止ナット100を、ボルト40に対して雌ネジ部20側から取り付ける。締結方法は、螺合されるボルト40に対して締め付け回転する際に、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させる。
この構成によれば、緩み防止ナット100は、ボルト40と螺合する雌ネジ部20を有する。このため、緩み防止ナット100は、緩み防止ナット100がボルト40に締め付けられる際に、締め付け回転方向である進行方向に回転できる。また、緩み防止ナット100は、雌ネジ部20に連続して孔部30を有する。そして、螺合されるボルト40に対して締め付け回転する際に、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させていく。そのため、ボルト40が緩み防止ナット100の雌ネジ部20と螺合しない形に塑性変形されている。よって、緩み防止ナット100は、戻り回転方向である後退方向に回転することができない。
特に、締結した建築部品の振動あるいは機械部品の回転を起因とする戻り回転しようとする力は、ボルト40の雄ネジ部41のネジ山44を孔部30で塑性変形させる力よりも弱い。このため、緩み防止ナット100は、戻り回転してボルト40の雄ネジ部41の外周面46を再度変形させることもない。したがって、緩み防止ナット100は、締結した建築部品の振動あるいは機械部品の回転を起因とする戻り回転による緩みがより強固に防止できる。
The loosening prevention nut 100 is provided with a female screw portion 20 which is continuous from an opening opened at one end face 21 and which is screwed to the male screw portion 41 of the bolt 40. The loosening prevention nut 100 is continuous with an opening opened at the other end face 31 and includes a hole 30 having a diameter smaller than the external thread diameter 42 of the external thread 41 of the bolt 40. In the fastening method, the anti-loosening nut 100 is attached to the bolt 40 from the female screw 20 side. In the fastening method, the thread 44 of the male screw portion 41 of the bolt 40 is plastically deformed at the hole 30 when it is tightened and rotated with respect to the bolt 40 to be screwed.
According to this configuration, the loosening prevention nut 100 has the internal thread 20 screwed with the bolt 40. Therefore, when the loosening prevention nut 100 is tightened to the bolt 40, the loosening prevention nut 100 can be rotated in the advancing direction which is the tightening rotational direction. Further, the loosening prevention nut 100 has a hole 30 continuously to the female screw 20. Then, when the screw 40 is tightened and rotated, the screw thread 44 of the male screw portion 41 of the bolt 40 is plastically deformed in the hole 30. Therefore, the bolt 40 is plastically deformed so as not to engage with the female screw portion 20 of the loosening prevention nut 100. Therefore, the loosening prevention nut 100 can not rotate in the reverse direction which is the return rotation direction.
In particular, the force to return and rotate due to the vibration of the fastened building component or the rotation of the mechanical component is weaker than the force that plastically deforms the thread 44 of the male screw 41 of the bolt 40 at the hole 30. Therefore, the loosening prevention nut 100 does not return to rotate and deform the outer peripheral surface 46 of the male screw portion 41 of the bolt 40 again. Therefore, the loosening prevention nut 100 can prevent the loosening due to the return rotation caused by the vibration of the fastened building component or the rotation of the mechanical component more firmly.

実施の形態2.
図7は、本発明の実施の形態2に係る緩み防止ナット200を示す断面図である。実施の形態2では、実施の形態1と異なる点を中心に説明する。
Second Embodiment
FIG. 7 is a cross-sectional view showing a loosening prevention nut 200 according to a second embodiment of the present invention. In the second embodiment, points different from the first embodiment will be mainly described.

図7に示す緩み防止ナット200は、雌ネジ部20と、テーパ部60と、孔部30と、を備えている。
雌ネジ部20とテーパ部60と孔部30とは、軸方向に延びる中心線が一致している。
また、雌ネジ部20と孔部30とは、テーパ部60を介して連続して形成されている。
The loosening prevention nut 200 shown in FIG. 7 includes a female screw portion 20, a tapered portion 60, and a hole 30.
The female screw portion 20, the tapered portion 60, and the hole portion 30 have central lines extending in the axial direction coincide with each other.
In addition, the female screw portion 20 and the hole portion 30 are continuously formed via the taper portion 60.

テーパ部60は、雌ネジ部20から孔部30に向かって径が小さくなる円すい台形状の内周面を有している。
なお、雌ネジ部20および孔部30は、実施の形態1と同様な構成である。
The tapered portion 60 has a truncated cone-shaped inner circumferential surface whose diameter decreases from the female screw portion 20 toward the hole 30.
The female screw portion 20 and the hole 30 have the same configuration as that of the first embodiment.

以上のような構成の緩み防止ナット200は、締め付け回転方向とは反対方向である後退方向に、雌ネジ部20に連続してテーパ部60を有している。緩み防止ナット100は、テーパ部60の最小孔径に連続して同一の孔径で軸方向に延びる孔部30を有する。テーパ部60は、緩み防止ナット100が締め付け回転方向に回転させられると、ボルト40の雄ネジ部41のネジ山44を緩み防止ナット100の雌ネジ部20と螺合しない形に徐々に潰して塑性変形させる。そして、最後に孔部30がボルト40の雄ネジ部41のネジ山44を孔部30の孔径まで塑性変形させる。
このため、緩み防止ナット200がユーザーによって冶具を用いて締め付け回転方向に回転させられるときの力が実施の形態1の緩み防止ナット100を回転させる場合よりも小さくて済む。
The loosening prevention nut 200 configured as described above has a tapered portion 60 continuously with the female screw portion 20 in the reverse direction opposite to the tightening rotational direction. The loosening prevention nut 100 has a hole 30 extending in the axial direction with the same hole diameter continuously to the minimum hole diameter of the tapered portion 60. The taper portion 60 gradually crushes the screw thread 44 of the male screw portion 41 of the bolt 40 so as not to be screwed with the female screw portion 20 of the loosening prevention nut 100 when the loosening prevention nut 100 is tightened and rotated. Plastically deform. Finally, the hole 30 plastically deforms the thread 44 of the male screw 41 of the bolt 40 to the hole diameter of the hole 30.
For this reason, the force when the loosening prevention nut 200 is rotated by the user using the jig in the tightening and rotating direction may be smaller than in the case where the loosening prevention nut 100 of the first embodiment is rotated.

実施の形態2によれば、雌ネジ部20と孔部30とは、雌ネジ部20から孔部30に向かって径が小さくなるテーパ部60を介して連続して形成されている。
この構成によれば、テーパ部60を通過する際に、ボルト40の雄ネジ部41のネジ山44は、縮径する塑性変形を徐々に行う。このため、緩み防止ナット200がユーザーによって冶具を用いて締め付け回転方向に回転させられるときの力が小さくて済む。
According to the second embodiment, the female screw 20 and the hole 30 are continuously formed via the tapered portion 60 whose diameter decreases from the female screw 20 toward the hole 30.
According to this configuration, when passing through the tapered portion 60, the thread 44 of the male screw portion 41 of the bolt 40 gradually performs plastic deformation to reduce the diameter. For this reason, the force when the loosening prevention nut 200 is tightened and rotated by the user using the jig may be small.

20 雌ネジ部、21 端面、22 ネジ山、23 内径、30 孔部、31 端面、40 ボルト、41 雄ネジ部、42 雄ネジ外径、43 雄ネジ谷径、44 ネジ山、45 ネジ溝、46 外周面、47 境界、50 被締結部材、51 取付孔、60 テーパ部、100 緩み防止ナット、200 緩み防止ナット。   20 female screw part, 21 end face, 22 thread, 23 inner diameter, 30 hole part, 31 end face, 40 bolt, 41 male screw part, 42 male screw outer diameter, 43 male thread valley diameter, 44 thread, 45 thread groove, 46 outer circumferential surface, 47 boundary, 50 to-be-fastened member, 51 mounting hole, 60 taper portion, 100 loose lock nut, 200 loose lock nut.

Claims (6)

一方の端面に開口した開口部から連続し、相手部材の雄ネジ部に螺合する雌ネジ部と、
他方の端面に開口した開口部から連続し、前記相手部材の雄ネジ部の雄ネジ外径よりも小径であり、かつ、雄ネジ谷径より大径である孔部と、
を備え
前記相手部材に対して前記雌ネジ部側から取り付けられ、螺合される前記相手部材に対して締め付け回転する際に、前記相手部材の雄ネジ部のネジ山を前記孔部で塑性変形させる緩み防止ナット。
A female screw portion which is continuous from the opening portion opened to one end face and which is screwed to the male screw portion of the mating member;
A hole which is continuous with an opening at the other end face and which has a diameter smaller than the external diameter of the external thread of the external thread of the mating member and which is larger than the diameter of the external thread valley;
Equipped with
A looseness which plastically deforms a screw thread of an external thread portion of the mating member when it is attached to the mating member from the female screw side and tightened and rotated with respect to the mating member to be screwed together Prevent nut.
前記雌ネジ部と前記孔部とは、中心線が一致する請求項1に記載の緩み防止ナット。   The loosening prevention nut according to claim 1, wherein a center line of the female screw portion and the hole portion coincide with each other. 前記雌ネジ部と前記孔部とは、連続して形成された請求項1または2に記載の緩み防止ナット。   The loosening prevention nut according to claim 1 or 2, wherein the female screw portion and the hole portion are formed continuously. 前記雌ネジ部と前記孔部とは、前記雌ネジ部から前記孔部に向かって径が小さくなるテーパ部を介して連続して形成された請求項1または2に記載の緩み防止ナット。   The loosening prevention nut according to claim 1 or 2, wherein the female screw portion and the hole portion are continuously formed via a tapered portion whose diameter decreases from the female screw portion toward the hole portion. 前記孔部は、前記相手部材の雄ネジ部のネジ山を塑性変形させて前記相手部材の雄ネジ部のネジ溝が埋まり、前記相手部材の雄ネジ部を前記雌ネジ部の内径よりも大径に構成する孔径である請求項1〜4のいずれか1項に記載の緩み防止ナット。 In the hole, the thread of the male thread of the mating member is plastically deformed to fill the thread groove of the male thread of the mating member, and the male thread of the mating member is larger than the inner diameter of the female thread. The loosening prevention nut according to any one of claims 1 to 4, which is a hole diameter configured to a diameter. 一方の端面に開口した開口部から連続し、相手部材の雄ネジ部に螺合する雌ネジ部と、他方の端面に開口した開口部から連続し、前記相手部材の雄ネジ部の雄ネジ外径よりも小径であり、かつ、雄ネジ谷径より大径である孔部と、を備えた緩み防止ナットを、前記相手部材に対して前記雌ネジ部側から取り付け、螺合される前記相手部材に対して締め付け回転する際に、前記相手部材の雄ネジ部のネジ山を前記孔部で塑性変形させる締結方法。   An external thread is formed continuously from an opening opened in one end face, and an external thread is continued from an opening opened in the other end face, and an external thread is formed on the other end of the external thread. A loosening prevention nut having a hole smaller than the diameter and larger than the diameter of the external thread valley is attached to the opposing member from the female screw side, and the screw is engaged The fastening method of plastically deforming the screw thread of the external thread part of the other member at the hole when tightening and rotating the member.
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WO2012166552A1 (en) * 2011-06-02 2012-12-06 A. Raymond Et Cie Fasteners manufactured by three-dimensional printing
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