JP2018004067A - Falling-off prevention device for fastening nut - Google Patents

Falling-off prevention device for fastening nut Download PDF

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JP2018004067A
JP2018004067A JP2016138007A JP2016138007A JP2018004067A JP 2018004067 A JP2018004067 A JP 2018004067A JP 2016138007 A JP2016138007 A JP 2016138007A JP 2016138007 A JP2016138007 A JP 2016138007A JP 2018004067 A JP2018004067 A JP 2018004067A
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bolt
coil spring
vertical groove
coil
fastening nut
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鈴木　康之
Yasuyuki Suzuki
康之 鈴木
仁 荒
Hitoshi Ara
仁 荒
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Technocrat KK
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Technocrat KK
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Abstract

PROBLEM TO BE SOLVED: To provide a falling-off preventing device for a fastening nut for preventing the fastening nut screwed to a bolt from loosening due to vibration or the like and falling off from the bolt.SOLUTION: A falling-off prevention device is for a fastening nut 2 to be screwed onto a bolt 3. The falling-off prevention device comprises a cylindrical body 4 having a bolt through hole 41 at the center, and a coil spring 5 housed in the bolt through hole. The coil spring has a coil portion 51 to be screwed onto a male screw 3a of the bolt, and one end portion 52 extending from one side of the coil portion toward the other side and parallel to an axial direction and the other end portion 53 extending from the other side of the coil portion toward the one side and parallel to the axial direction, at a position outside the coil portion. In an inner peripheral wall 41a of the bolt through hole, a first vertical groove 42 is formed axially, and a second vertical groove 43 is formed at a position opposite to the first vertical groove. The one end portion of the coil spring is disposed in the first vertical groove so as to be movable in the axial direction and restricted in movement in the circumferential direction, and the other end portion of the coil spring is disposed in the second vertical groove in a non-contact state.SELECTED DRAWING: Figure 1

Description

この発明は、振動などでボルトに螺合した締結ナットが緩み、この締結ナットが前記ボルトから脱落することを防止するための締結ナットの脱落防止装置に関するものである。  The present invention relates to a fastening nut drop prevention device for preventing a fastening nut screwed into a bolt by vibration or the like from being loosened, and preventing the fastening nut from falling off the bolt.

周知のように、ボルトに締結されたナットの緩みを止めて脱落防止するものとして、切欠きにより非連続のリングをなし、内周に雌ネジを有するものが多数提案されている（特許文献１）。このようなナット緩み止めリングは、それ自体が有する弾性により、内周の雌ネジをボルトの雄ネジに押圧することによって、雄ネジとの間に作用する摩擦力を大きくして、緩み止めの脱落を図ろうとするものである。  As is well known, as a means for preventing loosening of a nut fastened to a bolt and preventing it from falling off, a number of non-continuous rings formed by notches and having a female thread on the inner periphery have been proposed (Patent Document 1). ). Such a nut locking ring increases the frictional force acting between the male screw by pressing the inner female screw against the male screw of the bolt due to its own elasticity. It is intended to drop out.

特開昭５５−１１５６１３号公報Japanese Patent Application Laid-Open No. 55-115613

この特許文献１に記載のナット緩み止めリングでは、弾性力の大きさに限界があり、十分な緩み止め効果は得られず、しかも、通常のナットと同様に緩んでボルトから脱落してしまう虞があるので、抜け止め脱落の防止効果は得られないという問題があり、しかも、緩み止めリングの組み付けに手間がかかるなどの問題があった。  In the nut locking ring described in Patent Document 1, there is a limit to the magnitude of the elastic force, a sufficient locking effect cannot be obtained, and the nut may be loosened and fall off from the bolt in the same manner as a normal nut. Therefore, there is a problem that the effect of preventing the slipping-off and dropping cannot be obtained, and there is a problem that it takes time to assemble the locking ring.

この発明は、以上のようなことを考慮してなされたもので、ボルトにコイルバネが簡易に螺合され、長期間にわたって振動や外力等が作用することによる締結ナットの緩みによる脱落を確実に防止することができ、しかも、脱落を防止するための加工が少なく製作が容易な締結ナットの脱落防止装置を提供することを目的とする。  The present invention has been made in consideration of the above, and the coil spring is simply screwed onto the bolt, and it is reliably prevented from falling off due to loosening of the fastening nut due to vibration, external force, etc. acting over a long period of time. Another object of the present invention is to provide a fastening nut drop-off prevention device that can be manufactured and that is easy to manufacture with less processing for preventing the drop-off.

前記課題を解決し、かつ目的を達成するために、この発明は、以下のように構成した。  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

請求項１に記載の発明は、ボルトに螺合する締結ナットの脱落防止装置であって、この脱落防止装置は中央に前記ボルト貫通孔を有する筒体と、前記ボルト貫通孔内に収納されるコイルバネとよりなり、前記コイルバネは前記ボルトの雄ネジに螺合するコイル部と、前記コイル部の外側の位置で、前記コイル部の一方から他方に向かい延出する軸方向と平行な一端部と、前記コイル部の他方から一方に向かい延出する軸方向と平行な他端部と、を有し、
前記ボルト貫通孔の内周壁で軸方向に第１縦溝と、この第１縦溝に対向する位置に第２縦溝を形成し、
前記コイルバネの前記一端部が軸方向に移動可能で、かつ、周方向の移動が規制される前記一端部を前記第１縦溝内に設置し、
前記コイルバネの前記他端部を前記第２縦溝内に非接触状態で配置することを特徴とする締結ナットの脱落防止装置である。The invention according to claim 1 is a device for preventing a fastening nut from being screwed into a bolt, and the device is stored in the bolt through-hole and a cylinder having the bolt through-hole at the center. A coil spring that is screwed into a male screw of the bolt, and an end parallel to the axial direction that extends from one side of the coil to the other at a position outside the coil. The other end of the coil portion extending in the direction from the other to the other and parallel to the axial direction,
Forming a first vertical groove in the axial direction on the inner peripheral wall of the bolt through-hole and a second vertical groove at a position facing the first vertical groove;
The one end of the coil spring is movable in the axial direction, and the one end that is restricted from moving in the circumferential direction is installed in the first vertical groove,
The other end portion of the coil spring is disposed in a non-contact state in the second vertical groove, and is a fastening nut dropout prevention device.

請求項２に記載の発明は、ボルトに螺合する締結ナットの脱落防止装置であって、この脱落防止装置は中央にボルト貫通孔を有する筒体と、前記ボルト貫通孔内に収納されるコイルバネとよりなり、前記コイルバネは前記ボルトの雄ネジに螺合するコイル部と、前記コイル部の外側の位置で、前記コイル部の一方から他方に向かい延出する軸方向と平行な一端部と、前記コイル部より直線状にのみ延出する他端部と、を有し、
前記ボルト貫通孔の内周壁で軸方向に第１縦溝と、この第１縦溝に対向する位置に第２縦溝を形成し、
前記コイルバネの前記一端部が前記筒体の軸方向に移動可能で、かつ、周方向の移動を規制される前記一端部を前記第１縦溝内に配置し、
前記コイルバネの前記他端部を前記第２縦溝に非接触状態で配置することを特徴とする締結ナットの脱落防止装置である。According to a second aspect of the present invention, there is provided a device for preventing a fastening nut from being screwed into a bolt, wherein the device is provided with a cylindrical body having a bolt through hole in the center, and a coil spring housed in the bolt through hole. The coil spring is screwed into a male thread of the bolt, and one end portion parallel to the axial direction extending from one side of the coil portion to the other at a position outside the coil portion, The other end extending only linearly from the coil portion,
Forming a first vertical groove in the axial direction on the inner peripheral wall of the bolt through-hole and a second vertical groove at a position facing the first vertical groove;
The one end of the coil spring is movable in the axial direction of the cylindrical body, and the one end that is restricted from moving in the circumferential direction is disposed in the first vertical groove,
The other end portion of the coil spring is disposed in a non-contact state with the second vertical groove, and is a fastening nut dropout prevention device.

請求項３に記載の発明は、前記第１縦溝と第２縦溝とは、前記筒体の一側面を開口端にすること特徴とする請求項１または請求項２に記載の締結ナットの脱落防止装置である。。  According to a third aspect of the present invention, in the fastening nut according to the first or second aspect, the first vertical groove and the second vertical groove have one side surface of the cylindrical body as an open end. This is a drop-off prevention device. .

請求項４に記載の発明は、前記コイルバネが前記ボルト貫通孔より抜け出ることを阻止する抜け止め手段を前記第１溝の前記開口端に設けることを特徴とする請求項３に記載の締結ナットの脱落防止装置である。  The invention according to claim 4 is characterized in that a retaining means for preventing the coil spring from coming out of the bolt through hole is provided at the opening end of the first groove. This is a drop-off prevention device.

前記構成により、この発明は、以下のような効果を有する。  With the above configuration, the present invention has the following effects.

請求項１に記載の発明では、前記コイルバネの前記一端部を前記筒体の前記第１縦溝内で軸線方向に移動可能にすることにより、前記コイルバネの前記コイル部に前記ボルトの前記雄ネジが螺合し始めると、前記コイルバネの前記一端部が前記第一縦溝内で軸方向に移動し、前記ボルトの前記雄ネジのピッチに前記コイル部のピッチが合致することになり、前記ボルトを円滑に前記コイルバネに螺合できる。  In the first aspect of the present invention, the one end portion of the coil spring can be moved in the axial direction within the first vertical groove of the cylindrical body, whereby the male screw of the bolt is attached to the coil portion of the coil spring. When the screw begins to be screwed, the one end portion of the coil spring moves in the axial direction within the first vertical groove, and the pitch of the coil portion matches the pitch of the male screw of the bolt. Can be smoothly screwed into the coil spring.

また、前記コイルバネの前記一端部は周方向の移動が規制されるので、前記コイルバネに螺合した前記ボルトの離脱方向への回転に対し、前記ボルトの前記雄ネジに前記コイルバネの前記コイル部が密着して、前記筒体の回転を阻止することになり、被締結部材から前記ボルトに伝わる振動などで、前記締結ナットが緩み脱落することを確実に防止できる。  In addition, since the one end of the coil spring is restricted from moving in the circumferential direction, the coil portion of the coil spring is connected to the male screw of the bolt against rotation of the bolt that is screwed into the coil spring. The cylinders are in close contact with each other and the rotation of the cylindrical body is prevented, and the fastening nut can be reliably prevented from loosening and falling off due to vibration transmitted from the fastened member to the bolt.

しかも、前記コイルバネの前記一端部と前記他端部は同一形状となり、前記コイルバネの向きを確認しなくても、前記筒体に挿入することができ、前記筒体と前記コイルバネとの組立が容易になるとともに、前記他端部が前記筒体の前記一側面に臨むことになり、前記コイルバネの前記コイル部を外方へ広げる操作が容易にでき、前記ボルトの離脱が簡単になる。  In addition, the one end and the other end of the coil spring have the same shape, and can be inserted into the cylinder without checking the direction of the coil spring, and the assembly of the cylinder and the coil spring is easy. At the same time, the other end portion faces the one side surface of the cylindrical body, the operation of expanding the coil portion of the coil spring to the outside can be facilitated, and the bolt can be easily detached.

請求項２に記載の発明では、前記コイル部の外側の位置で、前記コイル部の一方から他方に向かい延出する軸方向と平行な一端部に対して、前記他端部は前記コイル部より直線状にのみ延出するので、前記第２縦溝において前記コイルバネの前記他端部は接触箇所が少なく、前記被締結部材からの振動が前記コイルバネに伝わり難く、前記ボルトの前記雄ネジに対する前記コイル部の緩みがなくなる。  According to a second aspect of the present invention, the other end portion of the coil portion at a position outside the coil portion is parallel to the axial direction extending from one side of the coil portion to the other side, and the other end portion is more than the coil portion. Since it extends only in a straight line, the other end of the coil spring in the second vertical groove has few contact points, and vibration from the fastened member is difficult to be transmitted to the coil spring, and the bolt with respect to the male screw There is no loosening of the coil.

また、前記ボルトの離脱方向への回転によって前記コイルバネが引きずられて回動し、前記コイルバネの前記他端部の先端が前記第２縦溝の側壁に喰い込むことになり、前記コイルバネの前記コイル部が外方へ広がり、前記雄ネジに密着する前記コイル部との間に隙間ができ、摩擦が無くなるか、あるいは軽減する等で自由に回転できるようになり、前記コイルバネを前記ボルトから支障なく離脱できる。  Further, the coil spring is dragged and rotated by the rotation of the bolt in the disengagement direction, and the tip of the other end of the coil spring bites into the side wall of the second vertical groove, and the coil of the coil spring The part spreads outward, and a gap is formed between the coil part and the coil part that is in close contact with the male screw, and the coil spring can be rotated freely by eliminating or reducing the friction, and the coil spring can be easily removed from the bolt. You can leave.

請求項３に記載の発明では、前記第１縦溝と第２縦溝とは、前記筒体の一側面を開口端にするので、前記コイルバネの前記一側端および前記他側端を前記第１縦溝および前記第２縦溝に容易に配置でき、前記筒体に前記コイルバネを簡単に組立られる。  In the invention according to claim 3, since the first vertical groove and the second vertical groove have one side surface of the cylindrical body as an open end, the one side end and the other side end of the coil spring are set to the first side groove. The coil spring can be easily assembled to the cylindrical body because it can be easily disposed in the first longitudinal groove and the second longitudinal groove.

請求項４に記載の発明では、前記コイルバネが前記ボルト貫通孔より抜け出ることを阻止する抜け止め手段を前記第１溝の前記開口端に設けるので、前記第１縦溝に前記コイルバネの前記一端部を軸方向に移動可能になっていても、前記コイルバネが前記ボルト貫通孔から抜け出ることを確実に防止できる。  In the invention according to claim 4, since the coil spring is provided with a retaining means for preventing the coil spring from coming out of the bolt through hole at the opening end of the first groove, the one end portion of the coil spring is provided in the first longitudinal groove. Even if it can be moved in the axial direction, the coil spring can be reliably prevented from coming out of the bolt through hole.

第１の実施の形態の締結ナットの脱落防止装置をボルトに装着した状態の断面図である。It is sectional drawing of the state which mounted | wore the bolt with the fastening nut fall-off prevention apparatus of 1st Embodiment. 第１の実施の形態を示す締結ナットの脱落防止装置の断面図である。It is sectional drawing of the falling-off prevention apparatus of the fastening nut which shows 1st Embodiment. 図１のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. コイルバネの抜け止め手段である。A coil spring retaining means. 締結ナットの脱落防止装置の動作を示すもので、（ａ）はボルトの螺合時における動作を示す断面図、（ｂ）はナットの離脱時における動作を示す断面図である。The operation of the fastening nut drop-off prevention device is shown. (A) is a cross-sectional view showing the operation when the bolt is screwed, and (b) is a cross-sectional view showing the operation when the nut is detached. 第２の実施の形態を示す締結ナットの脱落防止装置の断面図である。It is sectional drawing of the falling-off prevention apparatus of the fastening nut which shows 2nd Embodiment. 図６のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 第３の実施の形態を示す締結ナットの脱落防止装置の断面図である。It is sectional drawing of the falling-off prevention apparatus of the fastening nut which shows 3rd Embodiment.

以下、この発明における締結ナットの脱落防止装置の第１の実施の形態について説明する。この発明の実施の形態は、発明の最も好ましい形態を示すものであり、この発明はこれに限定されない。  Hereinafter, a first embodiment of a fastening nut drop-off preventing device according to the present invention will be described. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

この発明における第１の実施の形態を、図１および図５に基づいて説明する。図１は締結ナットの脱落防止装置を実施した一例を示すもので、符号１で示されるものは被締結部材で、鋼板をプレス加工して形成され一対のブラケットよりなる。  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example of a fastening nut dropout prevention device. Reference numeral 1 denotes a member to be fastened, which is formed by pressing a steel plate and includes a pair of brackets.

前記被締結部材１は、締結ナット２をボルト３に螺合することにより取付けられる。前記ボルト３には、前記締結ナット２が振動などで緩み脱落を防止する締結ナットの脱落防止装置が装着される。  The fastened member 1 is attached by screwing a fastening nut 2 to a bolt 3. The bolt 3 is mounted with a fastening nut drop-off prevention device that prevents the fastening nut 2 from loosening due to vibration or the like to prevent the bolt 3 from dropping off.

前記締結ナット２の脱落防止装置は、前記ボルト３が挿通されるボルト貫通孔６を穿設する筒体４と、前記ボルト貫通孔４内に収納されるコイルバネ５とよりなる。なお、前記筒体４を六角形状にしたが、八角形状、十二角形状及び四角形状などの多角形でもよい。  The device for preventing the fastening nut 2 from falling off includes a cylindrical body 4 that has a bolt through hole 6 through which the bolt 3 is inserted, and a coil spring 5 that is housed in the bolt through hole 4. In addition, although the said cylinder 4 was hexagonal shape, polygons, such as an octagon shape, a dodecagon shape, and a square shape, may be sufficient.

前記コイルバネ５は、前記ボルト３の雄ネジ３ａに螺合するコイル部５１を有し、このコイル部５１のコイルピッチは前記雄ネジ３ａのピッチより狭く設定される。  The coil spring 5 has a coil portion 51 that is screwed into the male screw 3a of the bolt 3, and the coil pitch of the coil portion 51 is set to be narrower than the pitch of the male screw 3a.

また、前記コイルバネ５は、前記コイル部５１の外周の接線上に沿い突出し、前記コイル部５１の外側の位置で屈曲し、前記コイル部５１の一方から他方に向かい延出する軸方向と平行な一端部５２を有する。  The coil spring 5 protrudes along a tangent line on the outer periphery of the coil part 51, bends at a position outside the coil part 51, and is parallel to an axial direction extending from one side of the coil part 51 to the other side. One end 52 is provided.

さらに、前記一端部５２と同じように、前記コイル部５１の外周の接線上に沿い突出し、前記コイル部５１の外側の位置で屈曲し、前記コイル部５１の他方から一方に向かい延出する軸方向と平行な他端部５３を有する。  Further, like the one end portion 52, the shaft protrudes along a tangent line on the outer periphery of the coil portion 51, bends at a position outside the coil portion 51, and extends from the other side of the coil portion 51 to one side. The other end 53 is parallel to the direction.

前記コイルバネ５の収納される前記ボルト貫通孔４１の内周壁４１ａには、前記筒体４の軸方向に第１縦溝４２と、前記第１縦溝４２に対向する位置に第２縦溝４３とを断面略台形状にして形成し、前記第１縦溝４２と第２縦溝４３のそれぞれは、前記筒体４の一側面４ａに開口端４４を有する。なお、前記第１縦溝４２の断面台形状の溝幅は前記第２縦溝４３の溝幅より狭くする。  A first vertical groove 42 in the axial direction of the cylindrical body 4 and a second vertical groove 43 at a position facing the first vertical groove 42 are formed in the inner peripheral wall 41a of the bolt through hole 41 in which the coil spring 5 is accommodated. Are formed in a substantially trapezoidal cross section, and each of the first vertical groove 42 and the second vertical groove 43 has an open end 44 on one side surface 4 a of the cylindrical body 4. The trapezoidal groove width of the first vertical groove 42 is narrower than that of the second vertical groove 43.

前記コイルバネ５は、前記筒体４の前記一側面４ａより前記ボルト貫通孔４１に挿入され、前記第１縦溝４２内に前記コイルバネ５の前記一端部５２を配置し、前記第２縦溝４３内には前記コイルバネ５の他端部５３を配置する。  The coil spring 5 is inserted into the bolt through hole 41 from the one side surface 4 a of the cylindrical body 4, the one end 52 of the coil spring 5 is disposed in the first vertical groove 42, and the second vertical groove 43. The other end 53 of the coil spring 5 is disposed inside.

前記第１縦溝４２内の前記コイルバネ５の前記一端部５２は、軸方向に移動可能で、かつ、周方向への移動を規制するよう配置され、前記第２縦溝４３内の前記コイルバネ５の前記他端部５３は、非接触状態にして配置させる。  The one end portion 52 of the coil spring 5 in the first vertical groove 42 is arranged so as to be movable in the axial direction and to restrict movement in the circumferential direction, and the coil spring 5 in the second vertical groove 43. The other end portion 53 is arranged in a non-contact state.

符号６は、前記コイルバネ５が前記ボルト貫通孔４１より抜け出ること阻止するよう前記筒体４の前記一側面４ａに設けた抜け止め手段で、切欠け６１ａを有するリング６１よりなり、前記切欠き６１ａにより前記リング６１を縮径して前記ボルト貫通孔４１に嵌合する。  Reference numeral 6 denotes a retaining means provided on the one side surface 4a of the cylindrical body 4 so as to prevent the coil spring 5 from coming out of the bolt through hole 41. The retaining member 6 comprises a ring 61 having a notch 61a, and the notch 61a. Thus, the diameter of the ring 61 is reduced and fitted into the bolt through hole 41.

前記抜け止め手段６により、前記コイルバネ５の前記一端部５２が前記第１縦溝内で軸方向に移動可能で、かつ、前記コイルバネ５の前記他端部５３が第２縦溝４３内非接触状態になっていても前記コイルバネ５は前記ボルト貫通孔４１より抜け出ることがない。  By means of the retaining means 6, the one end 52 of the coil spring 5 can be moved in the axial direction within the first longitudinal groove, and the other end 53 of the coil spring 5 is not in contact with the second longitudinal groove 43. Even if it is in the state, the coil spring 5 does not come out of the bolt through hole 41.

なお、前記抜け止め手段６は、前記リング６１により前記第１縦溝４２か、前記第２縦溝４３の前記開口端４４のいずれかを塞ぐとよい。また、前記ボルト貫通孔４１の周縁となる前記筒体４の前記一側面５２を内側に屈曲してもよい。  Note that the retaining means 6 preferably closes either the first vertical groove 42 or the opening end 44 of the second vertical groove 43 with the ring 61. Further, the one side surface 52 of the cylindrical body 4 serving as the periphery of the bolt through hole 41 may be bent inward.

以上のように構成された実施の形態についての使用を図５（ａ）および（ｂ）により説明する。まず、前記筒体４の前記ボルト貫通孔４１内に収納した前記コイルバネ５に前記ボルト３を螺合する際、前記コイルバネ５の前記コイル部５１に前記ボルト３の前記雄ネジ３ａが螺合していくにつれ、前記コイルバネ５の前記一端部５２が前記第１縦溝４２内で軸方向に移動し、前記ボルト３の前記雄ネジ３ａのピッチに前記コイル部５１のコイルピッチが合致するようになる。  The use of the embodiment configured as described above will be described with reference to FIGS. First, when the bolt 3 is screwed into the coil spring 5 housed in the bolt through hole 41 of the cylindrical body 4, the male screw 3 a of the bolt 3 is screwed into the coil portion 51 of the coil spring 5. Accordingly, the one end portion 52 of the coil spring 5 moves in the axial direction in the first vertical groove 42 so that the coil pitch of the coil portion 51 matches the pitch of the male screw 3 a of the bolt 3. Become.

さらに、前記ボルト貫通孔４１内において前記ボルト３の前記雄ネジ３ａに嵌った前記コイルバネ５の前記コイル部５１は、前記一端部５２を支点として外方へ広がり、前記ボルト３の前記雄ネジ３ａと接触している前記コイルバネ５の素線の摩擦力が軽減され、そして、前記ナット２の前記雌ネジ２ａに対し前記ボルト３を螺合方向に回転すると、前記ナット２の前記雌ネジ２ａに前記ボルト３の前記雄ネジ３ａがネジ込まれる。  Further, the coil portion 51 of the coil spring 5 fitted into the male screw 3 a of the bolt 3 in the bolt through hole 41 extends outward with the one end portion 52 as a fulcrum, and the male screw 3 a of the bolt 3. When the bolt 3 is rotated in the screwing direction with respect to the female screw 2a of the nut 2, the frictional force of the wire of the coil spring 5 that is in contact with the nut 2 is reduced. The male screw 3a of the bolt 3 is screwed.

前記ボルト３が螺合された前記コイルバネ５の前記コイル部５１は、前記ボルト３の前記雄ネジ３ａに嵌り込み、前記コイル部５１の素線の弾性力により前記ボルト３の軸中心に向って押さえ付けられる。そして、前記ボルト３の螺合方向への回転に伴い前記ボルト３の前記雄ネジ３ａに前記コイル部５１が密着していることにより、前記コイルバネ５が引きずられて回動しても、前記コイルバネ５の前記他端部５３は前記コイル部５１の外周の接線上に沿い前記ボルト３の離脱方向に延出するので、前記コイルバネ５の前記他端部５３の先端が前記第２縦溝４３の側面に当接することがなく、前記ナット２の前記雌ネジ溝２ａに前記ボルト３の前記雄ネジ３ａが円滑に螺合する。  The coil portion 51 of the coil spring 5 to which the bolt 3 is screwed is fitted into the male screw 3 a of the bolt 3, and is directed toward the axial center of the bolt 3 by the elastic force of the element wire of the coil portion 51. Pressed down. The coil spring 51 is in close contact with the male screw 3a of the bolt 3 as the bolt 3 rotates in the screwing direction. The other end portion 53 of the coil spring 5 extends along the tangent line of the outer periphery of the coil portion 51 in the detaching direction of the bolt 3, so that the tip of the other end portion 53 of the coil spring 5 is The male screw 3a of the bolt 3 is smoothly screwed into the female screw groove 2a of the nut 2 without contacting the side surface.

そして、前記被締結部材１からの振動が伝わり、前記ナット２の前記雌ネジ２ａに対し前記ボルト３に離脱方向の回転が生じても、前記ボルト貫通孔４１内において前記コイルバネ５は、前記一端部５２を支点として内径方向に収縮する状態となるよう前記コイルバネ５の前記コイル部５１の素線が引っ張られて前記ボルト３の前記雄ネジ３ａを締め付け、強力な緩み止め状態にされる。このため、前記コイルバネ５と一体となった前記ボルト４は前記コイルバネ５の前記コイル部５１の部分で回転が阻止されて緩まなくなる。  And even if the vibration from the said to-be-fastened member 1 is transmitted and rotation of the said volt | bolt 3 with respect to the said female screw 2a of the said nut 2 arises, the said coil spring 5 is the said one end in the said bolt through-hole 41. The element wire of the coil part 51 of the coil spring 5 is pulled so as to be contracted in the inner diameter direction with the part 52 as a fulcrum, and the male screw 3a of the bolt 3 is tightened to make a strong loosening prevention state. For this reason, the bolt 4 integrated with the coil spring 5 is prevented from rotating at the portion of the coil portion 51 of the coil spring 5 and is not loosened.

前記ボルト４を前記ナット２から離脱させるため、前記ボルト４を強制的に離脱方向へ回転させると、この回転に伴い前記ボルト３の前記雄ネジ３ａに前記コイルバネ５の前記コイル部５１が密着し摩擦力を増加させて回転を阻止するが、この回転以上の力で回転をさせると、前記ボルト３の回転によって前記コイルバネ５が引きずられて回動し、前記コイルバネ５の前記他端部５３の先端が前記第２縦溝４３の側面に当たり、これにより前記コイルバネ５が外方へ広がり、摩擦がなくなるか、あるいは軽減する等で自由に回転できるようになり、前記筒体４を前記ボルト３から容易に離脱することができる。  When the bolt 4 is forcibly rotated in the disengagement direction in order to disengage the bolt 4 from the nut 2, the coil portion 51 of the coil spring 5 comes into close contact with the male screw 3 a of the bolt 3 along with this rotation. Although the rotation is prevented by increasing the frictional force, the rotation of the bolt 3 by the rotation of the bolt 3 causes the coil spring 5 to be dragged and rotated, and the other end 53 of the coil spring 5 is rotated. The front end of the cylindrical spring 4 comes into contact with the side surface of the second vertical groove 43, so that the coil spring 5 spreads outward and can be freely rotated by eliminating or reducing friction. It can be easily removed.

しかし、場合によっては、前記ボルト４の離脱方向Ｒへ回転させる力が大きくなり過ぎ、前記一端部５２を配置している前記第１縦溝４２に負荷が集中してかかることになり、前記一端部５２が破損したり、伸びる等変形して前記ボルト貫通孔４１の前記第１縦溝４２から外れることもある。  However, in some cases, the force for rotating the bolt 4 in the direction of separation R becomes excessively large, and a load is concentrated on the first vertical groove 42 in which the one end 52 is disposed. The part 52 may be damaged or deformed, such as extending, and may be disengaged from the first vertical groove 42 of the bolt through hole 41.

次に、第２の実施の形態について、図５と図６に基づいて説明する。この実施の形態において第１の実施の形態と同じ構成は同一の符号を付して説明する。  Next, a second embodiment will be described based on FIG. 5 and FIG. In this embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

第１の実施の形態で説明している前記コイルバネ５の前記他端部５３は、前記コイル部５１の外側の位置で、前記コイル部５１の一方から他方に向かい軸方向と平行に延びているが、第２の実施の形態では、前記コイルバネ５の他端部５３ａは前記コイル部５１より直線状にのみ延出しており、これを前記第２縦溝４３内に非接触状態で突出させる。  The other end portion 53 of the coil spring 5 described in the first embodiment extends from one side of the coil portion 51 to the other side in parallel with the axial direction at a position outside the coil portion 51. However, in the second embodiment, the other end portion 53 a of the coil spring 5 extends only linearly from the coil portion 51, and protrudes into the second vertical groove 43 in a non-contact state.

前記第２縦溝４３において前記コイルバネ５の他端部５３ａは接触箇所が少なくなり、前記被締結部材１からの振動が前記コイルバネ５に伝わり難く、前記ボルト３の前記雄ネジ３ａに対する前記コイル部５１の緩みがなくなる。  In the second vertical groove 43, the other end portion 53a of the coil spring 5 has fewer contact points, and vibration from the fastened member 1 is difficult to be transmitted to the coil spring 5. The coil portion of the bolt 3 with respect to the male screw 3a 51 is no longer loose.

また、前記ボルト３の離脱方向への回転によって前記コイルバネ５が引きずられて回動し、前記コイルバネ５の前記他端部５３ａの先端が前記第２縦溝４３の側壁に喰い込むことになり、前記コイルバネ５の前記コイル部５１が外方へ広がり、前記雄ネジ３ａに密着する前記コイル部５１との間に隙間ができ、摩擦が無くなるか、あるいは軽減する等で自由に回転できるようになり、前記コイルバネ５を前記ボルト３から円滑に離脱できる。  Further, the coil spring 5 is dragged and rotated by the rotation of the bolt 3 in the disengagement direction, and the tip of the other end 53a of the coil spring 5 bites into the side wall of the second vertical groove 43, The coil part 51 of the coil spring 5 spreads outward, and a gap is formed between the coil part 51 and the coil part 51 that is in close contact with the male screw 3a, so that it can be freely rotated by eliminating or reducing friction. The coil spring 5 can be smoothly detached from the bolt 3.

さらに、第３の実施の形態について、図７に基づいて説明する。この実施の形態において第１の実施の形態と同じ構成は同一の符号を付して説明する。  Further, a third embodiment will be described with reference to FIG. In this embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

この第３の実施の形態では、第１の実施の形態で説明している前記筒体４の前記他側面４ｂに凹部７を設け、この凹部７に２条〜３条の雌ネジを有する補助ナット８を嵌合する。  In the third embodiment, a concave portion 7 is provided on the other side surface 4b of the cylindrical body 4 described in the first embodiment, and the concave portion 7 has two to three female screws. The nut 8 is fitted.

前記補助ナット７の前記雌ネジの加工開始点が前記コイルバネ５の前記一端部５２に一致するよう前記凹部７に前記補助ナット８を嵌合することにより、前記コイル部５１と前記雌ネジが連続した螺旋になり、前記ボルト３の螺合を円滑に行うことができる。  By fitting the auxiliary nut 8 into the recess 7 so that the processing start point of the female screw of the auxiliary nut 7 coincides with the one end portion 52 of the coil spring 5, the coil portion 51 and the female screw are continuously connected. Thus, the bolt 3 can be smoothly screwed.

前記締結ナット２に対して前記コイルバネ５と前記補助ナット８とがダブルナットとして作用することになり、確実に前記締結ネジ２の緩みを防ぐことができる。  The coil spring 5 and the auxiliary nut 8 act as a double nut with respect to the fastening nut 2, and the loosening of the fastening screw 2 can be reliably prevented.

以上の構成における締結ナットの脱落防止装置において、前記コイルバネ５は前記コイル部５１の軸線に対して平行に延出する前記一端部５２を、前記締結ナット２の前記内周壁４１ａに穿設した前記第１縦溝に軸線方向に移動可能に配置するので、前記締結ナット２より突出する前記ボルト３の前記雄ネジ３ａが前記コイルバネ５の前記コイル部５２に螺合すると、前記コイルバネ５の前記一端部５２が前記第１縦溝４２内で軸方向に移動し、前記ボルト３の前記雄ネジ３ａのピッチに前記コイル部５１のピッチが合致するように調整でき、前記ボルト３を円滑に前記コイルバネ５に螺合できる。  In the fastening nut drop prevention device having the above-described configuration, the coil spring 5 has the one end portion 52 that extends in parallel to the axis of the coil portion 51, and is formed in the inner peripheral wall 41 a of the fastening nut 2. Since the first vertical groove is disposed so as to be movable in the axial direction, when the male screw 3 a of the bolt 3 protruding from the fastening nut 2 is screwed into the coil portion 52 of the coil spring 5, the one end of the coil spring 5 is The portion 52 moves in the axial direction within the first vertical groove 42 and can be adjusted so that the pitch of the coil portion 51 matches the pitch of the male screw 3a of the bolt 3, and the bolt 3 can be smoothly moved to the coil spring. 5 can be screwed together.

しかも、前記コイルバネ５の前記一端部５２は周方向の移動が規制されるので、前記締結ナット２が螺合した前記ボルト３の離脱方向への回転に対し、前記ボルト３の前記雄ネジ３ａに前記コイルバネ５の前記コイル部５１が密着し摩擦力により回転を阻止することになり、前記被締結部材１から前記締結ナット２に伝わる振動などで、前記ボルト３に螺合した前記締結ナット２が緩み脱落することを前記筒体４により確実に防止できる。  In addition, since the one end portion 52 of the coil spring 5 is restricted from moving in the circumferential direction, the male screw 3a of the bolt 3 is rotated against the rotation of the bolt 3 with which the fastening nut 2 is screwed. The coil portion 51 of the coil spring 5 is brought into close contact and rotation is prevented by a frictional force, and the fastening nut 2 screwed into the bolt 3 due to vibration transmitted from the fastened member 1 to the fastening nut 2 or the like. The cylindrical body 4 can reliably prevent loosening and falling off.

また、前記コイルバネ５の前記他端部５３を前記コイルバネ５の前記コイル部５１の外周の接線上に沿い前記ボルト３の離脱方向に延出し、前記第２縦溝４３内に配置してなるので、前記ボルト３を前記筒体４より取り外す際、前記ボルト３の離脱方向への回転によって前記コイルバネ５が引きずられて回動し、前記コイルバネ５の前記他端部５２ａの先端が前記第２縦溝４３の側面に当たり、これにより前記コイルバネ５が外方へ広がり、前記ボルト３の前記雄ネジ３ａに密着する前記コイル部５１との間に隙間ができ、摩擦が無くなるか、あるいは軽減する等で自由に回転できるようになり、前記筒体４を前記ボルト３から支障なく離脱できる。  Further, the other end portion 53 of the coil spring 5 extends along the tangent line of the outer periphery of the coil portion 51 of the coil spring 5 in the detaching direction of the bolt 3 and is disposed in the second vertical groove 43. When the bolt 3 is removed from the cylindrical body 4, the coil spring 5 is dragged and rotated by the rotation of the bolt 3 in the detaching direction, and the tip of the other end portion 52a of the coil spring 5 is in the second vertical direction. By hitting the side surface of the groove 43, the coil spring 5 spreads outward, and a gap is formed between the bolt 3 and the coil portion 51 that is in close contact with the male screw 3a, thereby eliminating or reducing friction. The cylinder 4 can be freely rotated and can be detached from the bolt 3 without any trouble.

さらに、前記第１縦溝４２と第２縦溝４３とは、前記筒体４の前記一側面４ａを前記開口端４４にするので、前記コイルバネ５の前記一側端５２および前記他側端５３、５３ａは前記第１縦溝４２と前記第２縦溝４３に容易に配置され、前記筒体４に前記コイルバネ５を簡単に組立できる。  Further, the first vertical groove 42 and the second vertical groove 43 make the one side surface 4 a of the cylindrical body 4 the opening end 44, so that the one side end 52 and the other side end 53 of the coil spring 5 are used. , 53a are easily disposed in the first vertical groove 42 and the second vertical groove 43, and the coil spring 5 can be easily assembled to the cylindrical body 4.

前記第１縦溝４２に前記コイルバネ５の前記一端部５２を軸方向に移動可能になっていても、前記コイルバネ５が前記ボルト貫通孔４１から抜け出ることを阻止する抜け止め手段６により、前記コイルバネ５が前記ボルト貫通孔４１から抜け出ることを確実に防止できる。  Even if the one end portion 52 of the coil spring 5 can be moved in the axial direction in the first vertical groove 42, the coil spring 5 is prevented by the retaining means 6 that prevents the coil spring 5 from coming out of the bolt through hole 41. 5 can be reliably prevented from coming out of the bolt through hole 41.

この発明は、被締結部材を固定するボルトに螺合し、緩みや脱落を防ぐ緩み止めナットに適用でき、ボルトに簡易に螺合され、しかも、ボルトから容易に離脱することができないようにする。  The present invention can be applied to a locking nut that is screwed to a bolt that fixes a member to be fastened to prevent loosening or falling off, and can be easily screwed to the bolt and cannot be easily detached from the bolt. .

１ 被締結部材
２ 締結ナット
３ ボルト
３ａ 雄ネジ
４ 筒体
４ａ 一側面
４ｂ 他側面
４１ ボルト貫通孔
４１ａ 内周壁
４２ 第１縦溝
４３ 第２縦溝
４４ 開口端
５ コイルバネ
５１ コイル部
５２ 一端部
５３、５３ａ 他端部
６ 抜け止め手段
６１ リング
６１ａ 切欠き
７ 凹部
８ 補助ナットDESCRIPTION OF SYMBOLS 1 Fastened member 2 Fastening nut 3 Bolt 3a Male screw 4 Cylindrical body 4a One side surface 4b Other side surface 41 Bolt through-hole 41a Inner peripheral wall 42 1st vertical groove 43 2nd vertical groove 44 Open end 5 Coil spring 51 Coil part 52 One end part 53 , 53a Other end 6 Retaining means 61 Ring 61a Notch 7 Recessed portion 8 Auxiliary nut

Claims (4)

ボルトに螺合する締結ナットの脱落防止装置であって、この脱落防止装置は中央に前記ボルト貫通孔を有する筒体と、前記ボルト貫通孔内に収納されるコイルバネとよりなり、前記コイルバネは前記ボルトの雄ネジに螺合するコイル部と、前記コイル部の外側の位置で、前記コイル部の一方から他方に向かい延出する軸方向と平行な一端部と、前記コイル部の他方から一方に向かい延出する軸方向と平行な他端部と、を有し、
前記ボルト貫通孔の内周壁で軸方向に第１縦溝と、この第１縦溝に対向する位置に第２縦溝を形成し、
前記コイルバネの前記一端部が軸方向に移動可能で、かつ、周方向の移動が規制される前記一端部を前記第１縦溝内に設置し、
前記コイルバネの前記他端部を前記第２縦溝内に非接触状態で配置することを特徴とする締結ナットの脱落防止装置。An apparatus for preventing a fastening nut from being screwed into a bolt, the falling prevention apparatus comprising a cylindrical body having the bolt through hole in the center and a coil spring housed in the bolt through hole. A coil portion that is screwed onto a male screw of the bolt, an end portion that is parallel to the axial direction extending from one side of the coil portion toward the other, and a position from the other side of the coil portion at a position outside the coil portion. The other end parallel to the axial direction extending opposite,
Forming a first vertical groove in the axial direction on the inner peripheral wall of the bolt through-hole and a second vertical groove at a position facing the first vertical groove;
The one end of the coil spring is movable in the axial direction, and the one end that is restricted from moving in the circumferential direction is installed in the first vertical groove,
The other end of the coil spring is disposed in the second vertical groove in a non-contact state, and the fastening nut is prevented from falling off. ボルトに螺合する締結ナットの脱落防止装置であって、この脱落防止装置は中央にボルト貫通孔を有する筒体と、前記ボルト貫通孔内に収納されるコイルバネとよりなり、前記コイルバネは前記ボルトの雄ネジに螺合するコイル部と、前記コイル部の外側の位置で、前記コイル部の一方から他方に向かい延出する軸方向と平行な一端部と、前記コイル部より直線状にのみ延出する他端部と、を有し、
前記ボルト貫通孔の内周壁で軸方向に第１縦溝と、この第１縦溝に対向する位置に第２縦溝を形成し、
前記コイルバネの前記一端部が前記筒体の軸方向に移動可能で、かつ、周方向の移動を規制される前記一端部を前記第１縦溝内に配置し、
前記コイルバネの前記他端部を前記第２縦溝に非接触状態で配置することを特徴とする締結ナットの脱落防止装置。An apparatus for preventing a fastening nut from being screwed into a bolt, the falling prevention apparatus comprising a cylindrical body having a bolt through hole in the center and a coil spring housed in the bolt through hole, the coil spring being the bolt A coil portion that is threadedly engaged with the male screw, an end portion that is parallel to the axial direction that extends from one side of the coil portion toward the other at a position outside the coil portion, and extends only linearly from the coil portion. And having the other end to be taken out,
Forming a first vertical groove in the axial direction on the inner peripheral wall of the bolt through-hole and a second vertical groove at a position facing the first vertical groove;
The one end of the coil spring is movable in the axial direction of the cylindrical body, and the one end that is restricted from moving in the circumferential direction is disposed in the first vertical groove,
A fastening nut drop-off prevention device, wherein the other end of the coil spring is disposed in a non-contact state with the second vertical groove. 前記第１縦溝と第２縦溝とは、前記筒体の一側面を開口端にすること特徴とする請求項１または請求項２に記載の締結ナットの脱落防止装置。  The fastening nut dropout prevention device according to claim 1 or 2, wherein the first vertical groove and the second vertical groove have one side surface of the cylindrical body as an open end. 前記コイルバネが前記ボルト貫通孔より抜け出ることを阻止する抜け止め手段を前記第１溝の前記開口端に設けることを特徴とする請求項３に記載の締結ナットの脱落防止装置。  4. The fastening nut dropout prevention device according to claim 3, wherein a retaining means for preventing the coil spring from slipping out of the bolt through hole is provided at the opening end of the first groove.
JP2016138007A 2016-06-27 2016-06-27 Falling-off prevention device for fastening nut Pending JP2018004067A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023136411A1 (en) * 2022-01-17 2023-07-20 문상열 Anti-loosening spring nut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023136411A1 (en) * 2022-01-17 2023-07-20 문상열 Anti-loosening spring nut

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