JP2013217486A - Lock nut - Google Patents

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JP2013217486A
JP2013217486A JP2012100396A JP2012100396A JP2013217486A JP 2013217486 A JP2013217486 A JP 2013217486A JP 2012100396 A JP2012100396 A JP 2012100396A JP 2012100396 A JP2012100396 A JP 2012100396A JP 2013217486 A JP2013217486 A JP 2013217486A
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nut
lock nut
screw hole
lock
cylindrical
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JP6096420B2 (en
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Bunkichi Tanaka
文吉 田中
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Abstract

PROBLEM TO BE SOLVED: To provide a lock nut with a simple structure, reducing manufacturing costs, facilitating operation, improving a fastening effect when fastening a bolt, and capable of keeping two members connected.SOLUTION: A lock nut 1 includes a first nut 10 pierced in an axial center by a screw hole 11 and formed in a circumference with a polygon part 12, and a second nut 20 provided on the first nut. The first nut includes a cylindrical part 13 formed in a portion in a screw hole circumference and excluding the polygon part, a protruding part 14 formed on a tip of the cylindrical part, and a slit part 15 formed on the cylindrical part. The slit part is formed in at least one portion of a taper part. The second nut is pierced in an axial center by a screw hole, and is formed in a circumference with a polygon part.

Description

本発明は、簡単な構造で且つ操作を容易とし、ボルトに締結した際の締付効果を向上させるとともに、二つのナットを連結することができるロックナットに関する。  The present invention relates to a lock nut that has a simple structure and is easy to operate, improves a tightening effect when fastened to a bolt, and can connect two nuts.

一般的に、二つ以上の部材を結合するには、ボルトとナットが使用される。この際、部材の貫通孔にボルトを挿入させ、ボルトの先端よりナットを螺着させてナットを締め付ける結合させる。  Generally, bolts and nuts are used to connect two or more members. At this time, the bolt is inserted into the through hole of the member, and the nut is screwed from the tip of the bolt to be tightened.

しかし、時間が経につれて、振動の発生や部材の変形によりナットが緩み、締付効力が低下するという問題が発生する。そのため、定期的に検査を行いナットの締付作業を実施しなければならなかった。  However, as time goes on, there is a problem that the nut is loosened due to the occurrence of vibration or deformation of the member, and the tightening effect is lowered. Therefore, it was necessary to perform regular inspections and tighten nuts.

それらの課題を解決する従来技術として、的確な締め付けトルクでもってナットの締め付けを容易に且つ確実に行うことができ、かつ、締め付け後はいたずら等により容易に取り外すことのできないようにする取り外し防止機能を有するナット、並びに、緩み止め特殊ダブルナットがある（例えば特許文献１参照）。
上掲特許文献１の取り外し防止機能を有するナット、並びに、緩み止め特殊ダブルナットは、ネジ孔が軸方向に貫通して軸中央部に形成されたナット本体と、該ナット本体の軸方向上部に設けられた回転工具係合部と、ナット本体と回転工具係合部とを連結する連結部とを備えて一体成形され、回転工具係合部の軸中央部にネジ孔の径よりも大きな径を有する空洞を形成し、回転工具係合部に係合した回転工具により所定トルクを超える締め付けトルクで回転工具係合部を締結したときに連結部が破断して、これによりナット本体から回転工具係合部が分離されてなることを特徴とするものである。
特開２００７−４０３４４号公報 As a conventional technology that solves these problems, the nut can be easily and reliably tightened with an accurate tightening torque, and it is not possible to easily remove the nut after it has been tightened. And a special double nut that prevents loosening (see, for example, Patent Document 1).
The nut having the removal preventing function and the special double nut for preventing loosening disclosed in the above-mentioned Patent Document 1 include a nut body formed at the center of the shaft with a screw hole penetrating in the axial direction, and an axially upper portion of the nut body. The rotating tool engaging portion provided and a connecting portion for connecting the nut body and the rotating tool engaging portion are integrally formed, and the diameter of the rotating tool engaging portion is larger than the diameter of the screw hole. When the rotary tool engaging portion is fastened with a tightening torque exceeding a predetermined torque by the rotary tool engaged with the rotary tool engaging portion, the connecting portion is broken, thereby causing the rotary tool to rotate from the nut body. The engaging portion is separated.
JP 2007-40344 A

しかしながら、上掲特許文献１の取り外し防止機能を有するナット、並びに、緩み止め特殊ダブルナットは、部品点数が多くなりコスト高に繋がるとともに、作業効率も低下するという問題が生じた。また、保管時においては、別々の部材を分解した状態で保管管理しなければならないという欠点があった。  However, the nut having the removal preventing function and the special double nut for preventing loosening described in the above-mentioned Patent Document 1 have a problem that the number of parts is increased, resulting in an increase in cost and a reduction in work efficiency. In addition, there is a drawback that storage management must be performed in a state in which separate members are disassembled during storage.

そこで本発明は上記の点に鑑み、簡単な構造で製造コストを削減するとともに、操作を容易とし、ボルトに締結した際の締付効果を向上させるとともに、二つの部材を連結させておくことができるロックナットを提供することにある。  Therefore, in view of the above points, the present invention can reduce the manufacturing cost with a simple structure, facilitate the operation, improve the tightening effect when fastened to the bolt, and connect the two members together. It is to provide a lock nut that can.

解決を解決するための手段Means for solving the solution

上記課題を解決するために本発明のロックナットは、ネジ孔が軸方向中央に貫通され、外周に多角形部が形成された第一ナットと、該第一ナットに装着される第二ナットで構成されるロックナットにおいて、前記第一ナットは、ネジ孔外周であって多角形部を除く箇所に形成された筒状部と、筒状部の先方に形成された突状部と、筒状部に形成された切込部とを備えることを特徴とする。  In order to solve the above-mentioned problems, a lock nut of the present invention includes a first nut having a screw hole penetrating in the center in the axial direction and having a polygonal portion formed on the outer periphery, and a second nut attached to the first nut. In the lock nut to be configured, the first nut includes a cylindrical portion formed at a location excluding the polygonal portion on the outer periphery of the screw hole, a protruding portion formed at the tip of the cylindrical portion, and a cylindrical shape And a cut portion formed in the portion.

また前記切込部は、テーパ部に少なくとも１箇所以上形成されている。  Further, at least one cut portion is formed in the tapered portion.

また前記第二ナットは、ネジ孔が軸方向中央に貫通され、外周に多角形部が形成されており、軸方向中央に第一ナットの筒状部が嵌入される開孔部が形成されており、該開孔部の先方に先尖状のテーパ部が形成されている。  Further, the second nut has a screw hole penetrating in the center in the axial direction, a polygonal part is formed on the outer periphery, and an opening part into which the cylindrical part of the first nut is fitted is formed in the center in the axial direction. A pointed taper portion is formed at the tip of the opening.

また前記第二ナットに切込部を形成した。  A cut portion was formed in the second nut.

また第一ナットの筒状部に係止用凸部を形成した。  Moreover, the convex part for latching was formed in the cylindrical part of the 1st nut.

また第二ナットの開孔部に、前記第一ナットの係止用凸部が配置される係止用凹部を形成した。  Further, a locking recess in which the locking protrusion of the first nut is disposed is formed in the opening of the second nut.

さらに、前記第一ナットに防水用の座金を装着した。  Further, a waterproof washer was attached to the first nut.

発明の効果Effect of the invention

第一ナットは、ネジ孔外周であって多角形部を除く箇所に形成された筒状部と、筒状部の先方に形成された突状部と、筒状部に形成された切込部とを備え、第二ナットは、ネジ孔が軸方向中央に貫通され、外周に多角形部が形成されており、軸方向中央に第一ナットの筒状部が嵌入される開孔部が形成されており、該開孔部の先方に先尖状のテーパ部が形成されているため、ボルトに第二ナットおよび第一ナットを螺着させ、第二ナットの開孔部に第一ナットの筒状部を嵌入させることにより、第一ナットの突状部が第二ナットのテーパ部に締め付けられ、ボルトにロックされた状態で締結される。  The first nut is a cylindrical portion formed at a location excluding the polygonal portion on the outer periphery of the screw hole, a protruding portion formed at the tip of the cylindrical portion, and a cut portion formed in the cylindrical portion The second nut has a screw hole penetrating in the center in the axial direction, a polygonal portion is formed on the outer periphery, and an opening portion in which the cylindrical portion of the first nut is fitted in the center in the axial direction is formed Since the tip of the opening has a pointed taper, the second nut and the first nut are screwed onto the bolt, and the first nut is inserted into the opening of the second nut. By fitting the tubular portion, the protruding portion of the first nut is fastened to the tapered portion of the second nut and fastened in a state of being locked to the bolt.

また第一ナットの筒状部と第二ナットの多角形部に切込部を形成することで、チャック式ナットのように、第一ナットと第二ナットの締め付け強度を一層高めることができる。  Further, by forming the cut portion in the cylindrical portion of the first nut and the polygonal portion of the second nut, the tightening strength of the first nut and the second nut can be further increased as in the case of the chuck type nut.

さらに、第一ナットの筒状部に係止用凸部を形成し、第二ナットの開孔部に、前記第一ナットの係止用凸部が配置される係止用凹部を形成したことにより、第一ナットの筒状部を押圧することで、係止用凸部が係止用凹部に係止されて、第一ナットと第二ナットとが一体的に連結された状態に保持される。そのため、それぞれの部材を別々に保管する必要がなくなり利便性が向上される。  Furthermore, a locking projection is formed in the cylindrical portion of the first nut, and a locking recess in which the locking projection of the first nut is arranged is formed in the opening portion of the second nut. By pressing the cylindrical portion of the first nut, the locking convex portion is locked to the locking concave portion, and the first nut and the second nut are held in an integrally connected state. The Therefore, it is not necessary to store each member separately, and convenience is improved.

本発明におけるロックナットの斜視図である。It is a perspective view of the lock nut in the present invention. 前記ロックナットの使用状態断面図である。It is a use state sectional view of the lock nut. 第二ナットに切込を設けたロックナットの斜視図である。It is a perspective view of the lock nut which provided the notch in the 2nd nut. 他の好適例であるロックナットの斜視図である。It is a perspective view of the lock nut which is another suitable example. 前記ロックナットの使用状態断面図である。It is a use state sectional view of the lock nut.

以下、本発明のロックナットにおける実施の形態を図面に基づいて説明する。
本発明のロックナットは、簡単な構造で製造コストを削減するとともに、操作を容易とし、ボルトに締結した際の締付効果を向上させるとともに、二つの部材を連結させておくことができることを特徴とする。Embodiments of the lock nut of the present invention will be described below with reference to the drawings.
The lock nut of the present invention has a simple structure that reduces manufacturing costs, facilitates operation, improves the tightening effect when fastened to a bolt, and allows two members to be connected. And

図示するロックナット１は、ネジ孔１１が軸方向中央に貫通され、外周に多角形部１２が形成された第一ナット１０と、該第一ナット１０に装着される第二ナット２０で構成される。  The illustrated lock nut 1 includes a first nut 10 having a screw hole 11 penetrating in the center in the axial direction and having a polygonal portion 12 formed on the outer periphery, and a second nut 20 attached to the first nut 10. The

前記第一ナット１０は、ネジ孔１１外周であって多角形部１２を除く箇所に形成された、内周にネジ孔１１が螺刻された筒状部１３と、筒状部１３の先方に形成された突状部１４と、筒状部１３に形成された切込部１５とを備える。  The first nut 10 is formed on the outer periphery of the screw hole 11 and excluding the polygonal part 12. The first nut 10 has a cylindrical part 13 in which the screw hole 11 is threaded on the inner periphery and a tip of the cylindrical part 13. The formed projecting part 14 and the notch part 15 formed in the cylindrical part 13 are provided.

前記切込部１５は、多角形部１２の基部より突状部１４の先端までに形成されている。また前記切込部１５は、筒状部１３に少なくとも１箇所以上形成されている。特に、加工面や締め付け効果を考慮した場合、４箇所形成することが好ましい。  The cut portion 15 is formed from the base portion of the polygonal portion 12 to the tip of the protruding portion 14. Further, at least one cut portion 15 is formed in the cylindrical portion 13. In particular, when considering the processing surface and the fastening effect, it is preferable to form four locations.

また前記第二ナット２０は、ネジ孔２１が軸方向中央に貫通され、外周に多角形部２２が形成されており、軸方向中央に第一ナット１０の筒状部１３が嵌入される開孔部２３が形成されている。また前記開孔部２３の先方には、先尖状のテーパ部２４が形成されている。  Further, the second nut 20 has a screw hole 21 penetrating in the center in the axial direction, a polygonal portion 22 formed on the outer periphery, and an opening in which the cylindrical portion 13 of the first nut 10 is fitted in the center in the axial direction. A portion 23 is formed. A pointed taper portion 24 is formed at the tip of the opening portion 23.

前記第一ナット１０と前記第二ナット２０とを上述の構造としたことにより、図２の（ａ）に示すように、第二ナット２０の開孔部２３に第一ナット１０の筒状部１３を配置させ、第一ナット１０をネジ込むことにより、（ｂ）に示すように第一ナット１０の筒状部１３が第二ナット２０の開孔部２３に嵌入される。さらに第一ナット１０をネジ込むと、（ｃ）に示すように、第一ナット１０の突状部１４が第二ナット２０のテーパ部２４により締め付けられ、切込部１５が押圧、圧縮されてボルト３０との締結力が向上し、第一ナット１０と第二ナット２０がロックされた状態となる。なお図中４０は、ロックナット１により締結される被締結部材を示す。  Since the first nut 10 and the second nut 20 have the above-described structure, the cylindrical portion of the first nut 10 is formed in the opening 23 of the second nut 20 as shown in FIG. 13 is arranged and the first nut 10 is screwed in, so that the cylindrical portion 13 of the first nut 10 is fitted into the opening 23 of the second nut 20 as shown in FIG. When the first nut 10 is further screwed in, as shown in (c), the projecting portion 14 of the first nut 10 is tightened by the taper portion 24 of the second nut 20, and the cut portion 15 is pressed and compressed. The fastening force with the bolt 30 is improved, and the first nut 10 and the second nut 20 are locked. In the figure, reference numeral 40 denotes a member to be fastened that is fastened by the lock nut 1.

また他の好適例として、図３に示すように、前記第二ナット２０の多角形部２２に切込部２５を形成してもよい。切込部２５は、開孔部２３の上面よりネジ孔２１の螺刻部近傍まで形成されている。また前記切込部２５は、多角形部２２に少なくとも一箇所、好ましくは４箇所形成することが好ましい。前記第二ナット２０の多角形部２２に切込部２５を形成することで、前記第一ナット１０を締め付けた際、第二ナット２０が開口されて、第一ナット１０と第二ナット２０とのロック状態を好適におこなうことができる。  As another suitable example, as shown in FIG. 3, a cut portion 25 may be formed in the polygonal portion 22 of the second nut 20. The cut portion 25 is formed from the upper surface of the opening portion 23 to the vicinity of the threaded portion of the screw hole 21. Moreover, it is preferable to form the said cut | notch part 25 in the polygonal part 22 at least one place, Preferably four places. When the first nut 10 is tightened by forming the cut portion 25 in the polygonal portion 22 of the second nut 20, the second nut 20 is opened, and the first nut 10, the second nut 20, The locked state can be suitably performed.

また他の好適例として、図４に示すように、本発明のロックナット１において、第一ナット１０の筒状部１３に係止用凸部１６を形成し、第二ナット２０の開孔部２３に、前記第一ナット１０の係止用凸部１６が配置される係止用凹部２６を形成することもできる。  As another preferred example, as shown in FIG. 4, in the lock nut 1 of the present invention, a locking convex portion 16 is formed on the tubular portion 13 of the first nut 10, and an opening portion of the second nut 20 is formed. A locking recess 26 in which the locking projection 16 of the first nut 10 is disposed can also be formed in 23.

本発明のロックナット１を上述の構成としたことにより、第二ナット２０の開孔部２３に第一ナット１０の筒状部１３を押圧することで、第一ナット１０の係止用凸部１６が第二ナット２０の係止用凹部２６に嵌入される。そのため、第一ナット１０と第二ナット２０が一体的に連結された状態となり、保管や運搬時等の利便性が向上する。  Since the lock nut 1 of the present invention has the above-described configuration, the locking nut 1 of the first nut 10 is pressed by pressing the cylindrical portion 13 of the first nut 10 against the opening 23 of the second nut 20. 16 is inserted into the locking recess 26 of the second nut 20. Therefore, the first nut 10 and the second nut 20 are integrally connected, and convenience during storage and transportation is improved.

また図５の（ａ）に示すように、第二ナット２０の開孔部２３に第一ナット１０の筒状部１３を配置させ、第一ナット１０をボルト３０にネジ込むことにより、（ｂ）に示すように第一ナット１０の係止用凸部１６が第二ナット２０の係止用凹部２６に配設することもできる。この状態でさらに第一ナット１０をネジ込むと、（ｃ）に示すように、第一ナット１０の係止用凸部１６が第二ナット２０のテーパ部２４により締め付けられ、切込部１５が押圧、圧縮されて締結力が向上し、第一ナット１０と第二ナット２０がロックされた状態となる。  Further, as shown in FIG. 5A, the cylindrical portion 13 of the first nut 10 is disposed in the opening portion 23 of the second nut 20 and the first nut 10 is screwed into the bolt 30 (b). ), The locking projection 16 of the first nut 10 can be disposed in the locking recess 26 of the second nut 20. When the first nut 10 is further screwed in this state, the locking projection 16 of the first nut 10 is tightened by the taper portion 24 of the second nut 20 as shown in FIG. The fastening force is improved by being pressed and compressed, and the first nut 10 and the second nut 20 are locked.

また他の好適例として前記第一ナット１０に防水用の座金１７を装着してもよい。座金１７は樹脂ゴム等の防水性、柔軟性に優れた素材で形成されており、第一ナット１０の筒状部１３の基部に装着される。第一ナット１０に座金１７を装着することにより、切込部１５から雨水等が内部に浸水することを防ぐことができる。  As another preferred example, a waterproof washer 17 may be attached to the first nut 10. The washer 17 is formed of a material having excellent waterproofness and flexibility such as resin rubber, and is attached to the base of the cylindrical portion 13 of the first nut 10. By attaching the washer 17 to the first nut 10, it is possible to prevent rainwater or the like from entering the inside from the cut portion 15.

上述の構成により、本発明のロックナットは、簡単な構造で製造コストを削減するとともに、操作を容易とし、ボルトに締結した際の締付効果を向上させるとともに、二つの部材を連結させておくことができる。  With the above-described configuration, the lock nut of the present invention has a simple structure that reduces manufacturing costs, facilitates operation, improves the tightening effect when fastened to the bolt, and connects the two members together. be able to.

１ ロックナット
１０ 第一ナット
１１ ネジ孔
１２ 多角形部
１３ 筒状部
１４ 突状部
１５ 切込部
１６ 係止用凸部
１７ 座金
２０ 第二ナット
２１ ネジ孔
２２ 多角形部
２３ 開孔部
２４ テーパ部
２５ 切込部
２６ 係止用凹部
３０ ボルト
４０ 被締結部材DESCRIPTION OF SYMBOLS 1 Lock nut 10 1st nut 11 Screw hole 12 Polygonal part 13 Tubular part 14 Projection part 15 Cut part 16 Locking convex part 17 Washer 20 Second nut 21 Screw hole 22 Polygon part 23 Opening part 24 Tapered portion 25 Notch portion 26 Locking recess 30 Bolt 40 Fastened member

Claims (7)

ネジ孔が軸方向中央に貫通され、外周に多角形部が形成された第一ナットと、該第一ナットに装着される第二ナットで構成されるロックナットにおいて、前記第一ナットは、ネジ孔外周であって多角形部を除く箇所に形成された筒状部と、筒状部の先方に形成された突状部と、筒状部に形成された切込部とを備えることを特徴とするロックナット。  A lock nut comprising a first nut having a screw hole penetrating in the center in the axial direction and having a polygonal portion formed on the outer periphery, and a second nut attached to the first nut, wherein the first nut is a screw It is provided with a cylindrical part formed at a location excluding the polygonal part on the outer periphery of the hole, a protruding part formed at the tip of the cylindrical part, and a notch part formed in the cylindrical part. And lock nut. 前記切込部は、テーパ部に少なくとも１箇所以上形成されている請求項１記載のロックナット。  The lock nut according to claim 1, wherein at least one cut portion is formed in the tapered portion. 前記第二ナットは、ネジ孔が軸方向中央に貫通され、外周に多角形部が形成されており、軸方向中央に第一ナットの筒状部が嵌入される開孔部が形成されており、該開孔部の先方に先尖状のテーパ部が形成されている請求項１記載のロックナット。  In the second nut, a screw hole is penetrated in the center in the axial direction, a polygonal part is formed on the outer periphery, and an opening part in which the cylindrical part of the first nut is fitted is formed in the center in the axial direction. The lock nut according to claim 1, wherein a tip-like tapered portion is formed at the tip of the opening portion. 前記第二ナットに切込部を形成した請求項３記載のロックナット。  The lock nut according to claim 3, wherein a cut portion is formed in the second nut. 第一ナットの筒状部に係止用凸部を形成した請求項１または２記載のロックナット。  The lock nut according to claim 1 or 2, wherein a locking convex portion is formed on the cylindrical portion of the first nut. 第二ナットの開孔部に、前記第一ナットの係止用凸部が配置される係止用凹部を形成した請求項３または４記載のロックナット。  The lock nut according to claim 3 or 4, wherein a locking concave portion in which the locking convex portion of the first nut is disposed is formed in an opening portion of the second nut. 前記第一ナットに、防水用の座金を装着した請求項１、２または５記載のロックナット。  The lock nut according to claim 1, wherein a waterproof washer is attached to the first nut.
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CN105570270A (en) * 2014-11-11 2016-05-11 何天麟 Detachable anti-theft nut and bolt assembly
JP2018105367A (en) * 2016-12-24 2018-07-05 守弘 和田 Lock nut
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CN110848233A (en) * 2019-12-06 2020-02-28 荆门市佰思机械科技有限公司 Staggered thread type locknut
CN110848232A (en) * 2019-12-06 2020-02-28 荆门市佰思机械科技有限公司 Tight-clamping interlocking locknut
WO2023176502A1 (en) * 2022-03-16 2023-09-21 日立Astemo株式会社 Damper and anti-loosening structure

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CN105570270A (en) * 2014-11-11 2016-05-11 何天麟 Detachable anti-theft nut and bolt assembly
JP2018105367A (en) * 2016-12-24 2018-07-05 守弘 和田 Lock nut
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
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CN110848233A (en) * 2019-12-06 2020-02-28 荆门市佰思机械科技有限公司 Staggered thread type locknut
CN110848232A (en) * 2019-12-06 2020-02-28 荆门市佰思机械科技有限公司 Tight-clamping interlocking locknut
WO2023176502A1 (en) * 2022-03-16 2023-09-21 日立Astemo株式会社 Damper and anti-loosening structure

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