JP2016156482A - Drop-off prevention tool - Google Patents

Drop-off prevention tool Download PDF

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JP2016156482A
JP2016156482A JP2015036484A JP2015036484A JP2016156482A JP 2016156482 A JP2016156482 A JP 2016156482A JP 2015036484 A JP2015036484 A JP 2015036484A JP 2015036484 A JP2015036484 A JP 2015036484A JP 2016156482 A JP2016156482 A JP 2016156482A
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coil spring
spring portion
coil
wire
drop
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JP6600469B2 (en
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佐々木 晴夫
Haruo Sasaki
晴夫 佐々木
麻起 大和矢
Maki Owaya
麻起 大和矢
真一郎 平田
Shinichiro Hirata
真一郎 平田
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TOKYO KOKI CO Ltd
Taisei Corp
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Taisei Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a drop-off prevention tool which can be threaded into a bolt with a small force and improves durability and reliability.SOLUTION: The drop-off prevention tool comprises: a first coil spring part formed from a coil element wire that is wound in a predetermined direction; a second coil spring part 2 which has one end to be connected with one end of the coil element wire forming the first coil spring part 1, is formed from a coil element wire that is wound in the same direction as the predetermined direction and has a diameter smaller than an inscribed circle of the first coil spring part; and a third coil spring part 3 which has one end to be connected with the other end at a side opposite to the one end of the coil element wire of the second coil spring part connected with the one end of the coil element wire of the first coil spring part, is formed from a coil element wire that is wound in the same direction as the predetermined direction, and has an inscribed circle that is larger than the diameter of the second coil spring part. A shape of the first coil spring part is substantially similar to that of the third coil spring part, the second coil spring part is formed from three or more coils, and half coils at both the ends of the second coil spring part are wound in such a manner that a curvature radius becomes larger gradually.SELECTED DRAWING: Figure 1

Description

本発明は、ボルトの脱落を防止する脱落防止具に関する。   The present invention relates to a drop-off prevention tool that prevents a bolt from dropping off.

一般に、建築構造物を構成する二つの部材を固定するための方法として、溶接により固定する方法や、ボルトとナットにより締結する方法が用いられている。溶接による固定はガスボンベやバーナー等の設備が必要で、施工に手間と時間がかかるので、ボルトとナットにより締結する方法が多く採用されている。ボルトとナットを用いて締結する方法では、締結したナットが振動等を受けて緩むことがあるため、ナットの緩みを防止する脱落防止具が提案されている。   Generally, as a method for fixing two members constituting a building structure, a method of fixing by welding or a method of fastening by bolts and nuts is used. Fixing by welding requires equipment such as a gas cylinder and a burner, and it takes time and labor for the construction, so a method of fastening with bolts and nuts is often employed. In the method of fastening using a bolt and a nut, since the fastened nut may be loosened due to vibration or the like, a drop-off preventing tool for preventing the nut from loosening has been proposed.

例えば、特許文献1には、所定の方向に巻回したコイル素線で構成された第1のコイルバネ部と、該第1のコイルバネ部を構成するコイル素線の一端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第1のコイルバネ部の内接円よりも小さい径を有する第2のコイルバネ部と、前記第1のコイルバネ部のコイル素線の一端と接続した前記第2のコイルバネ部のコイル素線の一端とは反対側の他端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第2のコイルバネ部の径よりも大きい内接円を有する第3のコイルバネ部とを備え、前記第1のコイルバネ部の形状は、前記第3のコイルバネ部の形状と略同じである脱落防止具の発明が提案されている。
特許文献1に記載の脱落防止具は、第2のコイルバネ部をボルトにねじ込み、ナットや被固定物の緩みを防止するものである。
For example, Patent Document 1 has a first coil spring portion made of a coil wire wound in a predetermined direction, and one end connected to one end of a coil wire constituting the first coil spring portion. A second coil spring portion having a diameter smaller than an inscribed circle of the first coil spring portion, the coil coil wire being wound in the same direction as the predetermined direction, and the first coil spring portion. A coil element wire having one end connected to the other end opposite to one end of the coil element wire of the second coil spring portion connected to one end of the coil element wire and wound in the same direction as the predetermined direction And a third coil spring portion having an inscribed circle larger than the diameter of the second coil spring portion, and the shape of the first coil spring portion is substantially the same as the shape of the third coil spring portion. The invention of the fall-off prevention device is proposed .
The drop-off prevention tool described in Patent Document 1 is a device in which a second coil spring portion is screwed into a bolt to prevent loosening of a nut or an object to be fixed.

国際公開第2011/145212号International Publication No. 2011/145212

特許文献1の脱落防止具において、第2のコイルバネ部は全て同一の径で巻かれ、第2のコイルバネ部の内径は、ボルト径よりも略小さく形成されている。そのため、ボルトに装着するには、強く押し付けて第2のコイルバネ部を押し広げながらねじ込まねばならないため、施工性に問題があった。また、第2のコイルバネ部が全て同一の径で巻かれているため、ボルトに装着した時に第2のコイルバネ部はボルト溝とその全長で密着して、第2のコイルバネ部と第1および第3のコイルバネ部とを接続する部分はバネ弾性を有さない。そのため、ナットや被固定物からの衝撃が、吸収されることなく脱落防止具に加わるため、長期間使用しているうちに第2のコイルバネ部と第1および第3のコイルバネ部とを接続する部分が金属疲労により破断することがあった。さらに、特許文献1の脱落防止具は、コイル素線の断面形状が略四角形である角線が好ましいとされているが、角線は角部に力が集中するため振動等が加わると角部が摩耗しやすく、角部が摩耗すると脱落防止具が緩みやすくなるという問題があった。   In the drop-off prevention device of Patent Document 1, all the second coil spring portions are wound with the same diameter, and the inner diameter of the second coil spring portion is formed to be substantially smaller than the bolt diameter. Therefore, in order to attach to the bolt, there is a problem in workability because it has to be screwed in while strongly pressing and expanding the second coil spring portion. In addition, since the second coil spring portion is all wound with the same diameter, when the second coil spring portion is mounted on the bolt, the second coil spring portion is in close contact with the bolt groove along its entire length, and the second coil spring portion and the first and The part which connects 3 coil spring parts does not have spring elasticity. Therefore, since the impact from the nut or the object to be fixed is applied to the drop-off prevention device without being absorbed, the second coil spring portion and the first and third coil spring portions are connected during long-term use. The part sometimes broke due to metal fatigue. Furthermore, the drop-off prevention tool of Patent Document 1 is preferably a square wire having a substantially square cross-sectional shape of the coil wire. However, when the corners are worn, there is a problem that the drop-off prevention device becomes easy to loosen.

本発明は、小さな力でボルトにねじ込むことができ、耐久性、信頼性に優れた脱落防止具を提供することを課題とする。   An object of the present invention is to provide a drop-off prevention tool that can be screwed into a bolt with a small force and is excellent in durability and reliability.

1.所定の方向に巻回したコイル素線で構成された第1のコイルバネ部と、
該第1のコイルバネ部を構成するコイル素線の一端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第1のコイルバネ部の内接円よりも小さい径を有する第2のコイルバネ部と、
前記第1のコイルバネ部のコイル素線の一端と接続した前記第2のコイルバネ部のコイル素線の一端とは反対側の他端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第2のコイルバネ部の径よりも大きい内接円を有する第3のコイルバネ部とを備え、
前記第1のコイルバネ部の形状は、前記第3のコイルバネ部の形状と略同じであり、
前記第2のコイルバネ部は3巻以上で形成され、前記第2のコイルバネ部の両端の半巻は、徐々に曲率半径が大きくなるように巻かれていることを特徴とする脱落防止具。

2.前記コイル素線の断面形状が略円形であることを特徴とする1.に記載の脱落防止具。
3.前記第2のコイルバネ部の一端と接続する前記第1のコイルバネ部のコイル素線の一端とは反対側の他端が、前記第1のコイルバネ部の内側に向けられ、
前記第2のコイルバネ部のコイル素線の他端と接続する前記第3のコイルバネ部のコイル素線の一端とは反対側の他端が、前記第3のコイルバネ部の内側に向けられたことを特徴とする1.または2.に記載の脱落防止具。
4.前記第1のコイルバネ部と前記第3のコイルバネ部は隣接し、
前記第2のコイルバネ部の一端と接続する前記第1のコイルバネ部のコイル素線の一端とは反対側の他端、および前記第2のコイルバネ部のコイル素線の他端と接続する前記第3のコイルバネ部のコイル素線の一端とは反対側の他端は、前記第1のコイルバネ部を構成するコイル素線と前記第3のコイルバネ部を構成するコイル素線の間に位置することを特徴とする1.から3.のいずれかに記載の脱落防止具。
5.前記第1のコイルバネ部の形状および前記第3のコイルバネ部の形状は略六角形であることを特徴とする1.から4.のいずれかに記載の脱落防止具。
1. A first coil spring portion composed of a coil wire wound in a predetermined direction;
The first coil spring portion includes one end connected to one end of the coil wire and is configured by a coil wire wound in the same direction as the predetermined direction, and is inscribed in the first coil spring portion. A second coil spring portion having a diameter smaller than a circle;
One end connected to the other end opposite to one end of the coil element wire of the second coil spring part connected to one end of the coil element wire of the first coil spring part, and wound in the same direction as the predetermined direction A third coil spring portion having an inscribed circle larger than the diameter of the second coil spring portion, the third coil spring portion being configured with a turned coil wire;
The shape of the first coil spring portion is substantially the same as the shape of the third coil spring portion,
The second coil spring portion is formed of three or more turns, and half-turns at both ends of the second coil spring portion are wound so that the radius of curvature gradually increases.

2. The coil wire has a substantially circular cross-sectional shape. The fall-off prevention device described in 1.
3. The other end opposite to one end of the coil wire of the first coil spring part connected to one end of the second coil spring part is directed to the inside of the first coil spring part,
The other end of the third coil spring portion that is connected to the other end of the coil wire of the second coil spring portion is directed to the inside of the third coil spring portion. Features 1. Or 2. The fall-off prevention device described in 1.
4). The first coil spring portion and the third coil spring portion are adjacent to each other,
The other end of the first coil spring portion connected to one end of the second coil spring portion opposite to the one end of the coil strand and the other end of the second coil spring portion connected to the other end of the coil strand. The other end of the third coil spring portion opposite to the one end of the coil strand is located between the coil strand constituting the first coil spring portion and the coil strand constituting the third coil spring portion. Features 1. To 3. The fall prevention tool according to any one of the above.
5. 1. The shape of the first coil spring part and the shape of the third coil spring part are substantially hexagonal. To 4. The fall prevention tool according to any one of the above.

本発明に係る脱落防止具は、ボルトにねじ込む第2のコイルバネの両端の半巻が徐々に曲率半径が大きくなるように巻かれている。ボルトを最初にねじ込む部分の径が大きいため、ボルトに脱落防止具をねじ込む当初に必要な力が小さく、施工性に優れている。また、脱落防止具の第二のコイルバネの両端の半巻が徐々に曲率半径が大きくなるように、すなわち、第2のコイルバネ部の両末端はネジ溝から僅かに浮くように形成されているため、第2のコイルバネ部と、第1および第3のコイルバネ部とを接続する部分はバネ弾性を有する。このバネ弾性により、ナットや被固定物からの衝撃が吸収、減衰されるため、本発明の脱落防止具は長期間使用しても破断することはない。
また、コイル素線の断面形状が略円形であると、コイル素線とネジ溝とは角で接触しないため、コイル素線はネジ溝に嵌まりやすく、摩耗しにくい。
The drop-off prevention device according to the present invention is wound such that the half turns at both ends of the second coil spring screwed into the bolt gradually increase in curvature radius. Since the diameter of the part where the bolt is screwed first is large, the force required at the beginning of screwing the drop-off prevention tool into the bolt is small, and the workability is excellent. Further, the half turns at both ends of the second coil spring of the drop-off preventing tool are formed so that the radius of curvature gradually increases, that is, both ends of the second coil spring part are formed so as to slightly float from the thread groove. The portion connecting the second coil spring portion and the first and third coil spring portions has spring elasticity. The spring elasticity absorbs and attenuates the impact from the nut and the object to be fixed, so that the drop-off prevention device of the present invention does not break even when used for a long time.
In addition, when the coil wire has a substantially circular cross-sectional shape, the coil wire and the screw groove do not come into contact with each other at the corner, and therefore, the coil wire easily fits into the screw groove and is not easily worn.

第2のコイルバネ部の一端と接続する第1のコイルバネ部のコイル素線の一端とは反対側の他端が第1のコイルバネ部の内側に向けられ、第2のコイルバネ部のコイル素線の他端と接続する第3のコイルバネ部のコイル素線の一端とは反対側の他端が第3のコイルバネ部の内側に向けられることにより、脱落防止具同士が絡まりにくくなるため、多数の脱落防止具を同一の袋内に入れても、一つずつ取り出しやすく、作業性が向上する。
第1のコイルバネ部と第3のコイルバネ部とを隣接し、第2のコイルバネ部の一端と接続する第1のコイルバネ部のコイル素線の一端とは反対側の他端、および第2のコイルバネ部のコイル素線の他端と接続する第3のコイルバネ部のコイル素線の一端とは反対側の他端とを、第1のコイルバネ部を構成するコイル素線と第3のコイルバネ部を構成するコイル素線の間に位置させることにより、脱落防止具をコンパクトにすることができるため、多数の脱落防止具を取り扱うことが容易となる。
また、第1のコイルバネ部の形状および第3のコイルバネ部の形状を略六角形とすると、ナットの装着に用いたソケットレンチ等の汎用工具を持ち替えることなく脱落防止具をボルトに装着することができる。
The other end opposite to one end of the coil element wire of the first coil spring part connected to one end of the second coil spring part is directed to the inside of the first coil spring part, and the coil element wire of the second coil spring part Since the other end opposite to one end of the coil element wire of the third coil spring part connected to the other end is directed to the inside of the third coil spring part, the drop prevention devices are less likely to get entangled, so that a large number of dropouts occur. Even if the preventer is put in the same bag, it is easy to take out one by one and the workability is improved.
The first coil spring portion and the third coil spring portion are adjacent to each other and connected to one end of the second coil spring portion. The other end opposite to one end of the coil wire of the first coil spring portion, and the second coil spring The other end of the third coil spring portion connected to the other end of the coil strand of the third portion is opposite to the other end of the coil strand of the third coil spring portion, and the coil strand constituting the first coil spring portion and the third coil spring portion are By disposing between the coil wires constituting, the drop-off prevention tool can be made compact, so that it becomes easy to handle a number of drop-off prevention tools.
Moreover, when the shape of the first coil spring portion and the shape of the third coil spring portion are substantially hexagonal, the drop-off prevention tool can be attached to the bolt without changing a general-purpose tool such as a socket wrench used for attaching the nut. it can.

第一の実施態様の脱落防止具の斜視図。The perspective view of the drop-off prevention tool of the first embodiment. 第一の実施態様の脱落防止具の側面図。The side view of the drop-off prevention tool of the first embodiment. 第一の実施態様の脱落防止具の部分拡大図。The elements on larger scale of the drop-off prevention tool of the first embodiment. 第二の実施態様の脱落防止具の斜視図。The perspective view of the drop-off prevention tool of the second embodiment. 第二の実施態様の脱落防止具の側面図。The side view of the drop-off prevention tool of the second embodiment. 第一の実施態様の脱落防止具をボルトに装着した状態を示す概略図。Schematic which shows the state which mounted | wore the bolt with the drop-off prevention tool of the first embodiment.

本発明の脱落防止具は、
所定の方向に巻回したコイル素線で構成された第1のコイルバネ部と、
該第1のコイルバネ部を構成するコイル素線の一端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第1のコイルバネ部の内接円よりも小さい径を有する第2のコイルバネ部と、
前記第1のコイルバネ部のコイル素線の一端と接続した前記第2のコイルバネ部のコイル素線の一端とは反対側の他端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第2のコイルバネ部の径よりも大きい内接円を有する第3のコイルバネ部とを備え、
前記第1のコイルバネ部の形状は、前記第3のコイルバネ部の形状と略同じであり、
前記第2のコイルバネ部は3巻以上で形成され、前記第2のコイルバネ部の両端の半巻は、徐々に曲率半径が大きくなるように巻かれていることを特徴とする。
The fall prevention tool of the present invention is
A first coil spring portion composed of a coil wire wound in a predetermined direction;
The first coil spring portion includes one end connected to one end of the coil wire and is configured by a coil wire wound in the same direction as the predetermined direction, and is inscribed in the first coil spring portion. A second coil spring portion having a diameter smaller than a circle;
One end connected to the other end opposite to one end of the coil element wire of the second coil spring part connected to one end of the coil element wire of the first coil spring part, and wound in the same direction as the predetermined direction A third coil spring portion having an inscribed circle larger than the diameter of the second coil spring portion, the third coil spring portion being configured with a turned coil wire;
The shape of the first coil spring portion is substantially the same as the shape of the third coil spring portion,
The second coil spring portion is formed of three or more turns, and half turns at both ends of the second coil spring portion are wound so that the radius of curvature gradually increases.

以下、本発明の脱落防止具について図面を参照しながら説明する。
本発明の脱落防止具の第一の実施態様の斜視図を図1に、側面図を図2に示す。
Hereinafter, the dropout prevention device of the present invention will be described with reference to the drawings.
A perspective view of a first embodiment of the drop-off prevention device of the present invention is shown in FIG. 1, and a side view thereof is shown in FIG.

本発明の脱落防止具10は、図1の符号aで示す時計回りの方向に回された場合にボルトの脚部からボルトの頭部に向けて嵌り込む方向に巻回されており、
略六角形状に巻回したコイル素線で構成された第1のコイルバネ部1と、
第1のコイルバネ部を構成するコイル素線の一端と接続する一端を有し第1のコイルバネ部1と同じ方向に略円形状に巻回したコイル素線で構成されると共に、第1のコイルバネ部1の内接円よりも小さい径を有する第2のコイルバネ部2と、
第1のコイルバネ部1のコイル素線の一端と接続した前記第2のコイルバネ部2のコイル素線の一端とは反対側の他端と接続する一端を有し第1のコイルバネ部1と同じ方向に略六角形状に巻回したコイル素線で構成されると共に、前記第2のコイルバネ部2の径よりも大きい内接円を有する第3のコイルバネ部3とを備える。
The drop-off prevention tool 10 of the present invention is wound in a direction to be fitted from the leg portion of the bolt toward the head portion of the bolt when rotated in the clockwise direction indicated by reference sign a in FIG.
A first coil spring portion 1 composed of a coil wire wound in a substantially hexagonal shape;
The first coil spring includes a coil wire that has one end connected to one end of the coil wire constituting the first coil spring portion and is wound in a substantially circular shape in the same direction as the first coil spring portion 1. A second coil spring portion 2 having a diameter smaller than the inscribed circle of the portion 1;
Same as the first coil spring part 1, having one end connected to the other end opposite to one end of the coil element wire of the second coil spring part 2 connected to one end of the coil element wire of the first coil spring part 1. And a third coil spring portion 3 having an inscribed circle larger than the diameter of the second coil spring portion 2.

第1のコイルバネ部1の形状と、第3のコイルバネ部3の形状とは略同じである。なお、「第1のコイルバネ部の形状」および「第3のコイルバネ部の形状」は、ボルトに対して垂直な面における形状を意味する。第1のコイルバネ部の形状と、第3のコイルバネ部の形状とが略同じであるので、本発明の脱落防止具は、第1のコイルバネ部、第3のコイルバネ部のどちらからでもボルトに装着することができる。また、本実施態様の脱落防止具における第1のコイルバネ部の形状および第3のコイルバネ部の形状は略六角形であるから、ナットをボルトに螺合するためのソケットレンチ等を用いて脱落防止具をボルトに螺合することができる。ナットの装着に用いた工具を持ち替えることなく脱落防止具をボルトに装着することができるため、作業性に優れている。   The shape of the first coil spring part 1 and the shape of the third coil spring part 3 are substantially the same. Note that “the shape of the first coil spring portion” and “the shape of the third coil spring portion” mean a shape in a plane perpendicular to the bolt. Since the shape of the first coil spring portion and the shape of the third coil spring portion are substantially the same, the drop-off prevention device of the present invention can be attached to the bolt from either the first coil spring portion or the third coil spring portion. can do. Moreover, since the shape of the 1st coil spring part and the shape of the 3rd coil spring part in the drop-off prevention tool of this embodiment are substantially hexagons, drop-off prevention is performed using a socket wrench for screwing the nut onto the bolt. The tool can be screwed onto the bolt. Since the drop-off prevention tool can be attached to the bolt without changing the tool used for attaching the nut, the workability is excellent.

第2のコイルバネ部2の一端と接続する第1のコイルバネ部1のコイル素線の一端とは反対側の他端である基端部1Aは、第3のコイルバネ部3の方へ巻回されている。同様に、第2のコイルバネ部2のコイル素線の他端と接続する第3のコイルバネ部3のコイル素線の一端とは反対側の他端である先端部3Aは、第1のコイルバネ部1の方へ巻回されている。図2から分かるように、側面から見ると、第1のコイルバネ部1と第3のコイルバネ部3とは、第2のコイルバネ部がほとんど見えないほど隣接している。また、第1のコイルバネ部1の基端部1Aと第3のコイルバネ部の先端部3Aとは、第1のコイルバネ部を構成するコイル素線と第3のコイルバネ部を構成するコイル素線の間に位置し、互いに対向している。   A base end portion 1A that is the other end opposite to one end of the coil wire of the first coil spring portion 1 connected to one end of the second coil spring portion 2 is wound toward the third coil spring portion 3. ing. Similarly, the tip portion 3A, which is the other end opposite to one end of the coil wire of the third coil spring portion 3 connected to the other end of the coil wire of the second coil spring portion 2, is the first coil spring portion. It is wound in the direction of 1. As can be seen from FIG. 2, when viewed from the side, the first coil spring portion 1 and the third coil spring portion 3 are adjacent to each other such that the second coil spring portion is hardly visible. Further, the base end portion 1A of the first coil spring portion 1 and the tip end portion 3A of the third coil spring portion are a coil wire constituting the first coil spring portion and a coil wire constituting the third coil spring portion. Located in between and facing each other.

第2のコイルバネ部2は3巻以上で形成され、第2のコイルバネ部2の両端の半巻は、徐々に曲率半径が大きくなるように巻回されている。第2のコイルバネ部が3巻より短いと、ボルトと接する長さが短くなりボルトとの接触面積が少なくなるため、脱落防止性が低下する。第2のコイルバネ部2の巻数の上限は特に制限されないが、多すぎると脱落防止具が嵩高くなるため少ないことが好ましく、3巻であることが最も好ましい。また、第2のコイルバネ部2の両端の半巻は、コイル素線の直径分以上大きくなるように徐々に曲率半径が大きくなることが好ましい。   The second coil spring portion 2 is formed of three or more turns, and the half turns at both ends of the second coil spring portion 2 are wound so that the radius of curvature gradually increases. When the second coil spring portion is shorter than 3 turns, the length in contact with the bolt is shortened and the contact area with the bolt is reduced, so that the drop-off preventing property is lowered. The upper limit of the number of turns of the second coil spring portion 2 is not particularly limited, but if it is too large, the drop-off prevention tool becomes bulky, so that it is preferably small and most preferably 3 turns. Moreover, it is preferable that the radius of curvature gradually increases so that the half turns at both ends of the second coil spring portion 2 become larger than the diameter of the coil wire.

第2のコイルバネ部2は、両端を除く中央部の内径が、ボルト脚部の外径よりも僅かに小さく、かつ、ネジ溝の底部が形成する円の径よりも大きく形成される。そして、第2のコイルバネ部2の両端の半巻は、徐々に曲率半径が大きくなるように形成されている。本発明の脱落防止具は、ボルトに最初にねじ込む部分の径が大きいため、ボルトに脱落防止具をねじ込む当初に必要な力が少なくねじ込みやすく、施工性に優れている。また、ボルト先端であるネジ溝の端部と、第2のコイルバネとが嵌りやすいため、ボルト脚部の直径の誤差、ネジ溝端部の位置に関わらず、ボルトに装着するのが容易である。   The second coil spring portion 2 is formed such that the inner diameter of the central portion excluding both ends is slightly smaller than the outer diameter of the bolt leg portion and larger than the diameter of the circle formed by the bottom portion of the screw groove. And the half turns of the both ends of the 2nd coil spring part 2 are formed so that a curvature radius may become large gradually. Since the diameter of the part screwed first into the bolt is large, the drop-off prevention tool of the present invention is easy to screw with less force required at the beginning of screwing the drop-off prevention tool into the bolt, and has excellent workability. Further, since the end of the screw groove, which is the tip of the bolt, and the second coil spring are easily fitted, it is easy to attach to the bolt regardless of the error in the diameter of the bolt leg and the position of the end of the screw groove.

本発明の脱落防止具において、第2のコイルバネ部2を3巻で形成すると第2のコイルバネ部2の中央部2巻はボルトに密着する。第2のコイルバネ部2の両端の半巻は、徐々に曲率半径が大きくなるように巻かれているため、両端の半巻はその途中でネジ溝から離れ、第2のコイルバネ部の両末端はネジ溝から僅かに浮いている。本発明の脱落防止具をボルトに装着した時に、第2のコイルバネ部の両末端は、ネジ溝に密着しておらず変形可能であるためバネ弾性を有する。このバネ弾性により、ナットや被固定物からの衝撃が吸収、減衰されるため、本発明の脱落防止具は振動等により力が加わっても金属疲労が起きにくく破断しない。   In the drop-off prevention device of the present invention, when the second coil spring part 2 is formed with three turns, the second part of the center part of the second coil spring part 2 is in close contact with the bolt. Since the half turns at both ends of the second coil spring portion 2 are wound so that the radius of curvature gradually increases, the half turns at both ends are separated from the screw grooves on the way, and both ends of the second coil spring portion are It floats slightly from the thread groove. When the drop prevention tool of the present invention is attached to the bolt, both ends of the second coil spring portion are not in close contact with the thread groove and can be deformed, and thus have spring elasticity. This spring elasticity absorbs and attenuates the impact from the nut and the object to be fixed, so that the drop-off prevention device of the present invention does not easily break down even when force is applied by vibration or the like and does not break.

本発明の脱落防止具において、コイル素線の断面形状は制限されず、例えば、略円形や略四角形の鋼線を用いることができる。コイル素線とネジ溝とが角で接触せず、コイル素線がネジ溝に嵌まりやすく、摩耗しにくいため、コイル素線は、断面形状が略円形の鋼線や丸鋼を用いることが好ましい。断面形状は真円に限定されず、楕円形、卵型であってもよい。コイル素線の径は、ボルトのネジ溝に嵌ることができる大きさであればよい。すなわち、ボルトのネジ溝の両面に接触することのできる径であればよく、ネジ溝の深さの20〜80%の径を有することが好ましく、30〜70%の径を有することがより好ましい。   In the drop prevention tool of the present invention, the cross-sectional shape of the coil wire is not limited, and for example, a substantially circular or substantially square steel wire can be used. Since the coil wire and the thread groove do not come into contact at the corners, and the coil wire easily fits into the thread groove and is not easily worn, the coil wire may be a steel wire or a round steel having a substantially circular cross section. preferable. The cross-sectional shape is not limited to a perfect circle, and may be oval or egg-shaped. The diameter of the coil wire only needs to be large enough to fit in the screw groove of the bolt. That is, the diameter may be any diameter that can contact both surfaces of the screw groove of the bolt, and preferably has a diameter of 20 to 80% of the depth of the screw groove, and more preferably has a diameter of 30 to 70%. .

第一の実施態様の脱落防止具において、コイル素線の基端部1Aとコイル素線の先端部3Aとを内側に向けた状態を示す部分拡大図を図3に示す。なお、図3は、第1のコイルバネ部1側から見た図であり、第1のコイルバネ部1の基端部1A、及び第3のコイルバネ部の先端部3Aとの上方に位置する第1のコイルバネ部のコイル素線は省略されている。
図3において第1のコイルバネ部1を構成するコイル素線の基端部1Aと、第3のコイルバネ部3を構成するコイル素線の先端部3Aとは、それぞれ脱落防止具の内側に向けて5°曲げられている。それぞれを内側に向けて折り曲げることで、脱落防止具同士が絡まりにくくなるため、多数の脱落防止具を同一の袋内に入れても、一つずつ取り出しやすく、作業性が向上する。なお、内側に折り曲げる角度は5°に限定されない。
FIG. 3 is a partially enlarged view showing a state in which the proximal end portion 1A of the coil wire and the distal end portion 3A of the coil wire are directed inward in the dropout prevention device of the first embodiment. FIG. 3 is a view as seen from the first coil spring part 1 side. The first coil spring part 1 is located above the base end part 1A of the first coil spring part 1 and the tip part 3A of the third coil spring part. The coil wire of the coil spring portion is omitted.
In FIG. 3, the base end portion 1A of the coil wire constituting the first coil spring portion 1 and the tip end portion 3A of the coil wire constituting the third coil spring portion 3 are directed toward the inside of the drop-off prevention device. It is bent 5 °. By bending each of them inward, the drop-off prevention tools are less likely to get entangled, so even if a number of drop-off prevention tools are put in the same bag, they can be easily taken out one by one and workability is improved. In addition, the angle bent inside is not limited to 5 °.

本発明の脱落防止具の第二の実施態様の斜視図を図4に、側面図を図5に示す。
第二の実施態様の脱落防止具1は、第1のコイルバネ部1、第2のコイルバネ部2、第3のコイルバネ部3が上から下の一方に巻回されている以外は、上記第一の実施態様と同じである。
第二の実施態様の脱落防止具は、第一の実施態様の脱落防止具と比べると、その製造が容易であるため、低コストである。
FIG. 4 is a perspective view of a second embodiment of the drop-off preventing device of the present invention, and FIG. 5 is a side view thereof.
The drop-off prevention tool 1 of the second embodiment is the same as the first embodiment except that the first coil spring portion 1, the second coil spring portion 2, and the third coil spring portion 3 are wound around one from the top to the bottom. This is the same as the embodiment.
The drop-off prevention device of the second embodiment is less expensive than the drop-off prevention device of the first embodiment because it is easy to manufacture.

本発明の脱落防止具は上記の実施形態に限定されるものではない。例えば、第1のコイルバネ部と第3のコイルバネ部の形状は略四角形、略八角形、略円形等であってもよい。また、第1のコイルバネ部、第2のコイルバネ部および第3のコイルバネ部のコイル素線は、ボルトのネジ溝に応じて、時計回りの方向に巻回されてもよく、反時計回りに巻回されてもよい。   The drop-off prevention device of the present invention is not limited to the above embodiment. For example, the shape of the first coil spring portion and the third coil spring portion may be a substantially square shape, a substantially octagonal shape, a substantially circular shape, or the like. Further, the coil wires of the first coil spring part, the second coil spring part, and the third coil spring part may be wound in a clockwise direction according to the thread groove of the bolt, or may be wound counterclockwise. May be turned.

図6は、本発明の第一の実施態様の脱落防止具10をボルト4に装着した状態を示す概略図である。本発明の脱落防止具10をボルト4に装着する手順を説明する。
本発明の脱落防止具10の第2のコイルバネ部2とボルト4の先端部41とを当接した状態で、脱落防止具10を図6の符号aで示す方向に回転させることにより、第2のコイルバネ部2を構成するコイル素線をボルト4の先端部41からネジ溝に嵌り込ませる。図6では、第3のコイルバネ部3からボルト4に装着しているが、上記したように、本発明の脱落防止具10は、第1のコイルバネ部1、第3のコイルバネ部3のどちらからでもボルト4に装着することができる。
FIG. 6 is a schematic view showing a state in which the dropout prevention tool 10 according to the first embodiment of the present invention is attached to the bolt 4. A procedure for mounting the dropout prevention tool 10 of the present invention on the bolt 4 will be described.
In the state where the second coil spring portion 2 of the drop-off prevention device 10 of the present invention and the tip portion 41 of the bolt 4 are in contact with each other, the drop-off prevention device 10 is rotated in the direction indicated by symbol a in FIG. The coil wire constituting the coil spring portion 2 is inserted into the thread groove from the tip 41 of the bolt 4. In FIG. 6, the bolt 4 is attached from the third coil spring portion 3, but as described above, the drop-off prevention tool 10 of the present invention is from either the first coil spring portion 1 or the third coil spring portion 3. But it can be attached to the bolt 4.

本発明の第2のコイルバネ部2の両端の半巻は徐々に曲率半径が大きくなるように形成されており、ボルトに最初にねじ込む部分の径が大きくボルトに脱落防止具をねじ込む当初に必要な力が小さいため、ねじ込みやすく施工性に優れている。このとき、脱落防止具10の第1のコイルバネ部1および第3のコイルバネ部3とが略六角形であるため、6角ソケットレンチ等の汎用工具を用いて脱落防止具1をボルト4に装着することができる。そして、第3のコイルバネ部3がナット5に接触するまで脱落防止具10をねじ込むことで、脱落防止具10が装着される。   The half turns at both ends of the second coil spring portion 2 of the present invention are formed so that the radius of curvature gradually increases, and the diameter of the portion that is first screwed into the bolt is large and is necessary at the beginning of screwing the drop-off prevention device into the bolt. Since the force is small, it is easy to screw and has excellent workability. At this time, since the first coil spring portion 1 and the third coil spring portion 3 of the drop-off prevention tool 10 are substantially hexagonal, the drop-off prevention tool 1 is attached to the bolt 4 using a general-purpose tool such as a hexagon socket wrench. can do. Then, the dropout prevention tool 10 is mounted by screwing the dropout prevention tool 10 until the third coil spring portion 3 contacts the nut 5.

第2のコイルバネ部2の中央部の内径は、ボルト4の脚部の外径よりも僅かに小さく、かつ、ネジ溝の底部が形成する円の径よりも大きい。そのため、第2のコイルバネ部2の中央部を構成するコイル素線は、ネジ溝を埋めるように嵌り込み、コイル素線は弾性力によりボルトを締め付ける。その結果、コイル素線とネジ溝との間には強い摩擦力が生じ、第2のコイルバネ部2はボルト4のネジ溝に強固に固定される。本発明の脱落防止具はネジ溝に強固に固定されて緩まないため、脱落防止具10の下に位置するナット5も緩むことはない。   The inner diameter of the central part of the second coil spring part 2 is slightly smaller than the outer diameter of the leg part of the bolt 4 and larger than the diameter of the circle formed by the bottom part of the screw groove. For this reason, the coil wire constituting the central portion of the second coil spring portion 2 is fitted so as to fill the screw groove, and the coil wire fastens the bolt with an elastic force. As a result, a strong frictional force is generated between the coil wire and the screw groove, and the second coil spring portion 2 is firmly fixed to the screw groove of the bolt 4. Since the dropout prevention tool of the present invention is firmly fixed to the screw groove and does not loosen, the nut 5 located under the dropout prevention tool 10 does not loosen.

本発明の脱落防止具は、ナットの代用として、ボルトの締結具の役割を果たすこともできる。
すなわち、本発明の脱落防止具の第2のコイルバネ部2とボルト4の先端部41とを当接した状態で、脱落防止具を回転させることにより、第2のコイルバネ部2を構成するコイル素線をボルト4の先端部41からネジ溝に嵌り込ませる。本発明の第2のコイルバネ部2の両端の半巻は徐々に曲率半径が大きくなるように形成されており、ボルトに最初にねじ込む部分の径が大きいため、ボルトに脱落防止具をねじ込む当初に必要な力が少なくねじ込みやすく、施工性に優れている。そして、第3のコイルバネ部3が被固定物に当接して圧縮変形した状態になるまで締結具を回転させる。
The drop-off prevention device of the present invention can also serve as a bolt fastener as a substitute for a nut.
That is, the coil element constituting the second coil spring part 2 is rotated by rotating the drop-off prevention tool while the second coil spring part 2 of the drop-off prevention tool of the present invention is in contact with the tip 41 of the bolt 4. The wire is inserted into the screw groove from the tip 41 of the bolt 4. The half turns at both ends of the second coil spring portion 2 of the present invention are formed so that the radius of curvature gradually increases, and since the diameter of the portion that is first screwed into the bolt is large, the drop prevention tool is initially screwed into the bolt. Less force required, easy to screw in, and excellent workability. Then, the fastener is rotated until the third coil spring portion 3 comes into contact with the fixed object and is in a compressed and deformed state.

また、図6に示したボルト4に取り付けた脱落防止具10は、汎用工具を脱落防止具10に嵌め込み、符号aとは反対の方向に回転させることによって、ボルト4から取り外すことができる。脱落防止具1を符号aとは反対の方向に回転させると、第3のコイルバネ部3と第2のコイルバネ部2との接続部に符号aと反対の方向に力が加わるため、第2のコイルバネ部2は、その内径が拡大する方向に変形し、ボルト4の脚部に形成されたネジ溝に嵌り込むコイル素線が浮き気味となる。第2のコイルバネ部2とボルトの脚部との間の摩擦力が小さくなるため、脱落防止具10をスムーズに離脱方向へ回転させることができる。   Moreover, the fall prevention tool 10 attached to the bolt 4 shown in FIG. 6 can be removed from the bolt 4 by fitting a general-purpose tool into the fall prevention tool 10 and rotating it in the direction opposite to the symbol a. When the drop prevention tool 1 is rotated in the direction opposite to the symbol a, a force is applied to the connecting portion between the third coil spring portion 3 and the second coil spring portion 2 in the direction opposite to the symbol a. The coil spring portion 2 is deformed in the direction in which the inner diameter is enlarged, and the coil wire that fits into the thread groove formed in the leg portion of the bolt 4 becomes floating. Since the frictional force between the second coil spring part 2 and the leg part of the bolt becomes small, the drop-off prevention tool 10 can be smoothly rotated in the separation direction.

以上のように、本発明の脱落防止具は、第2のコイルバネ部を構成するコイル素線が、ボルトに形成されたネジ溝に嵌り込み、コイル素線がボルトを締め付けて強い摩擦力が生じるので、衝撃や振動が加わっても脱落防止具が緩むことはない。そのため、脱落防止具の下に位置するナットや被固定物がボルトから緩むことを防止することができる。   As described above, in the drop-off preventing device of the present invention, the coil wire constituting the second coil spring portion is fitted into the screw groove formed in the bolt, and the coil wire tightens the bolt to generate a strong frictional force. Therefore, even if an impact or vibration is applied, the drop-off prevention device does not loosen. Therefore, it is possible to prevent the nut and the object to be fixed located below the drop-off prevention tool from loosening from the bolt.

10 脱落防止具
1 第1のコイルバネ部
1A 基端部
2 第2のコイルバネ部
3 第3のコイルバネ部
3A 先端部
4 ボルト
41 ボルト先端部
5 ナット
DESCRIPTION OF SYMBOLS 10 Falling prevention tool 1 1st coil spring part 1A Base end part 2 2nd coil spring part 3 3rd coil spring part 3A Tip part 4 Bolt 41 Bolt tip part 5 Nut

Claims (5)

所定の方向に巻回したコイル素線で構成された第1のコイルバネ部と、
該第1のコイルバネ部を構成するコイル素線の一端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第1のコイルバネ部の内接円よりも小さい径を有する第2のコイルバネ部と、
前記第1のコイルバネ部のコイル素線の一端と接続した前記第2のコイルバネ部のコイル素線の一端とは反対側の他端と接続する一端を有し前記所定の方向と同じ方向に巻回したコイル素線で構成されると共に、前記第2のコイルバネ部の径よりも大きい内接円を有する第3のコイルバネ部とを備え、
前記第1のコイルバネ部の形状は、前記第3のコイルバネ部の形状と略同じであり、
前記第2のコイルバネ部は3巻以上で形成され、前記第2のコイルバネ部の両端の半巻は、徐々に曲率半径が大きくなるように巻かれていることを特徴とする脱落防止具。
A first coil spring portion composed of a coil wire wound in a predetermined direction;
The first coil spring portion includes one end connected to one end of the coil wire and is configured by a coil wire wound in the same direction as the predetermined direction, and is inscribed in the first coil spring portion. A second coil spring portion having a diameter smaller than a circle;
One end connected to the other end opposite to one end of the coil element wire of the second coil spring part connected to one end of the coil element wire of the first coil spring part, and wound in the same direction as the predetermined direction A third coil spring portion having an inscribed circle larger than the diameter of the second coil spring portion, the third coil spring portion being configured with a turned coil wire;
The shape of the first coil spring portion is substantially the same as the shape of the third coil spring portion,
The second coil spring portion is formed of three or more turns, and half-turns at both ends of the second coil spring portion are wound so that the radius of curvature gradually increases.
前記コイル素線の断面形状が略円形であることを特徴とする請求項1に記載の脱落防止具。   The fall prevention tool according to claim 1, wherein the coil wire has a substantially circular cross-sectional shape. 前記第2のコイルバネ部の一端と接続する前記第1のコイルバネ部のコイル素線の一端とは反対側の他端が、前記第1のコイルバネ部の内側に向けられ、
前記第2のコイルバネ部のコイル素線の他端と接続する前記第3のコイルバネ部のコイル素線の一端とは反対側の他端が、前記第3のコイルバネ部の内側に向けられたことを特徴とする請求項1または2に記載の脱落防止具。
The other end opposite to one end of the coil wire of the first coil spring part connected to one end of the second coil spring part is directed to the inside of the first coil spring part,
The other end of the third coil spring portion that is connected to the other end of the coil wire of the second coil spring portion is directed to the inside of the third coil spring portion. The drop-off prevention device according to claim 1 or 2, characterized in that.
前記第1のコイルバネ部と前記第3のコイルバネ部は隣接し、
前記第2のコイルバネ部の一端と接続する前記第1のコイルバネ部のコイル素線の一端とは反対側の他端、および前記第2のコイルバネ部のコイル素線の他端と接続する前記第3のコイルバネ部のコイル素線の一端とは反対側の他端は、前記第1のコイルバネ部を構成するコイル素線と前記第3のコイルバネ部を構成するコイル素線の間に位置することを特徴とする請求項1から3のいずれかに記載の脱落防止具。
The first coil spring portion and the third coil spring portion are adjacent to each other,
The other end of the first coil spring portion connected to one end of the second coil spring portion opposite to the one end of the coil strand and the other end of the second coil spring portion connected to the other end of the coil strand. The other end of the third coil spring portion opposite to the one end of the coil strand is located between the coil strand constituting the first coil spring portion and the coil strand constituting the third coil spring portion. 4. A dropout prevention device according to any one of claims 1 to 3.
前記第1のコイルバネ部の形状および前記第3のコイルバネ部の形状は略六角形であることを特徴とする請求項1から4のいずれかに記載の脱落防止具。   5. The dropout prevention tool according to claim 1, wherein a shape of the first coil spring portion and a shape of the third coil spring portion are substantially hexagonal.
JP2015036484A 2015-02-26 2015-02-26 Fall-off prevention device Active JP6600469B2 (en)

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
WO2017110852A1 (en) * 2015-12-22 2017-06-29 有限会社Sit Falling-off prevention tool
KR101817948B1 (en) 2017-08-10 2018-01-12 조정현 Locking nut
JP2018044604A (en) * 2016-09-14 2018-03-22 有限会社Sit Falling prevention tool
JP2019007526A (en) * 2017-06-22 2019-01-17 有限会社Sit Falling-out preventing tool
JP2020012545A (en) * 2018-07-20 2020-01-23 有限会社Sit Fall-off preventing tool
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DE19831001A1 (en) * 1998-07-10 2000-02-17 Volkswagen Ag Helicoil wire locking fixture for automotive applications comprises longitudinal axis with a second helical section and third section with an end-stop
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Publication number Priority date Publication date Assignee Title
WO2017110852A1 (en) * 2015-12-22 2017-06-29 有限会社Sit Falling-off prevention tool
JP2018044604A (en) * 2016-09-14 2018-03-22 有限会社Sit Falling prevention tool
JP2019007526A (en) * 2017-06-22 2019-01-17 有限会社Sit Falling-out preventing tool
KR101817948B1 (en) 2017-08-10 2018-01-12 조정현 Locking nut
JP2020012545A (en) * 2018-07-20 2020-01-23 有限会社Sit Fall-off preventing tool
JP7045065B2 (en) 2018-07-20 2022-03-31 有限会社Sit Falling prevention device
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