JP6145718B2 - Press wing nut locking device - Google Patents

Press wing nut locking device Download PDF

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JP6145718B2
JP6145718B2 JP2015078751A JP2015078751A JP6145718B2 JP 6145718 B2 JP6145718 B2 JP 6145718B2 JP 2015078751 A JP2015078751 A JP 2015078751A JP 2015078751 A JP2015078751 A JP 2015078751A JP 6145718 B2 JP6145718 B2 JP 6145718B2
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wing
bolt
coil spring
coil
wing nut
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JP2016180506A (en
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鈴木　康之
康之 鈴木
仁 荒
仁 荒
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鈴木　康之
康之 鈴木
株式会社テクノクラート
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Description

この発明は、金属板をプレス加工して形成されたプレス蝶ナットの緩みや外れを防止する緩み止め装置に関するものである。  The present invention relates to a locking device for preventing looseness and detachment of a press wing nut formed by pressing a metal plate.

従来、ナットの緩みを防止するものとして、特許文献１のようにボルトの雄ネジ溝のピッチに整合するコイルバネをナットのバネ収容凹部に収容し、ボルトとナットとが螺合したときのボルトに対するナットの離脱方向への回転に伴いボルトの雄ネジ溝にコイルバネが密着し摩擦力を増加して回転を阻止し、ボルトにナットを一旦締結すればその締結を容易に外すことができないようにするものがある。  Conventionally, as a means for preventing the loosening of the nut, a coil spring that matches the pitch of the male thread groove of the bolt is accommodated in the spring accommodating recess of the nut as in Patent Document 1, and the bolt when the bolt and the nut are screwed is applied to the bolt. A coil spring comes into close contact with the male thread groove of the bolt as the nut moves away from the bolt, increasing the frictional force to prevent the rotation, and once the nut is fastened to the bolt, the fastening cannot be easily removed. There is something.

特開２００３−３０７２１０号公報JP 2003-307210 A

解決しようとする問題点として、特許文献１による場合は、ナットにボルトの雄ネジ溝に密着するコイルバネを収納する凹部とか、コイルバネの折曲支持部の先端を嵌装保持する取付孔を設けることになり、これらの加工がナットに必要で、しかも、コイルバネの組み付けに手間がかかるなどの問題があった。  As a problem to be solved, in the case of Patent Document 1, a recess that houses a coil spring that is in close contact with a male screw groove of a bolt or a mounting hole that fits and holds the tip of a bent support portion of the coil spring is provided in the nut. Therefore, these processes are necessary for the nut, and there is a problem that assembly of the coil spring takes time and effort.

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、ボルトがコイルバネに簡易に螺合され、長期間にわたって振動や外力等が作用することによるナットの緩みを確実に防止することができ、しかも、緩む止めのための加工が少なく製作が容易な緩み止めナット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 it is possible to surely prevent the bolt from being loosely engaged with the coil spring and to prevent the nut from loosening due to vibration, external force, etc. acting over a long period of time. Another object of the present invention is to provide a locking nut that can be manufactured easily with little processing for locking.

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、金属板をプレス加工して形成された蝶ナット体であって、この蝶ナット体は中央にボルト貫通孔を有する凹状の胴部と、その両側に突出する一対の羽片を有する翼部とからなり、前記ボルト貫通孔にボルトの雄ネジが螺合する雌ネジ溝を形成し、この雌ネジ溝の加工開始の起点をいずれか一方の前記翼部の位置に合致させ、前記胴部の上方に前記ボルトの前記雄ネジのピッチに整合するコイル部のピッチを有するコイルバネを配置し、前記コイルバネの一方の前記端部を、前記コイル部の外周より外方の位置で前記コイル部の軸方向と平行に他方の前記端部側に向けて屈曲してスペーサーを被覆し、これを前記雌ネジ溝の前記起点と合致する前記翼部の前記羽片間に挿入して挟持し、さらに一方の前記端部の先端を前記胴部の底面に当接して前記コイルバネを片持支持し、前記蝶ナット体の前記胴部と、前記コイルバネの他方の前記端部との間に間隔を設け、前記コイルバネの他方の前記端部を前記胴部の上側において非接触状態で外方に突出させ、前記コイル部の軸方向と平行に一方の前記端部側に向かうように屈曲し、他方の前記翼部の近傍まで延出して先端を自由端にし、前記コイルバネの他方の前記端部より一方の前記端部まで前記ボルトの前記雄ネジを螺合可能にしてなることを特徴とするプレス蝶ナットの緩み止め装置である。The invention according to claim 1 is a wing nut body formed by pressing a metal plate, and the wing nut body has a concave body having a bolt through hole in the center and a pair projecting on both sides thereof. A female screw groove into which the male screw of the bolt is screwed into the bolt through-hole, and the starting point of the processing start of the female screw groove is the position of one of the wing parts. A coil spring having a pitch of the coil portion that matches the pitch of the male screw of the bolt is disposed above the body portion, and one end of the coil spring is disposed outward from the outer periphery of the coil portion. Bend toward the other end side in parallel with the axial direction of the coil portion at a position to cover the spacer, and this is between the blades of the wing portion that matches the starting point of the female screw groove. Insert and pinch, and then insert the tip of one of the ends Abutting on the bottom surface of the recording body portion to support the coil spring in a cantilever manner, a space is provided between the body portion of the wing nut body and the other end portion of the coil spring, and the other end of the coil spring is provided. The part protrudes outward in a non-contact state on the upper side of the body part, bends toward the one end part side in parallel with the axial direction of the coil part, and extends to the vicinity of the other wing part Thus , the press butterfly nut loosening prevention device is characterized in that the front end is a free end and the male screw of the bolt can be screwed from the other end of the coil spring to the one end.

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、金属板をプレス加工して形成された蝶ナット体であって、この蝶ナット体は中央にボルト貫通孔を有する凹状の胴部と、その両側に突出する一対の羽片を有する翼部とからなり、前記ボルト貫通孔にボルトの雄ネジが螺合する雌ネジ溝を形成し、この雌ネジ溝の加工開始の起点をいずれか一方の前記翼部の位置に合致させ、前記胴部の上方に前記ボルトの前記雄ネジのピッチに整合するコイル部のピッチを有するコイルバネを配置し、前記コイルバネの一方の前記端部を、前記コイル部の外周より外方の位置で前記コイル部の軸方向と平行に他方の前記端部側に向けて屈曲してスペーサーを被覆し、これを前記雌ネジ溝の前記起点と合致する前記翼部の前記羽片間に挿入して挟持し、さらに一方の前記端部の先端を前記胴部の底面に当接して前記コイルバネを片持支持し、前記蝶ナット体の前記胴部と、前記コイルバネの他方の前記端部との間に間隔を設け、前記コイルバネの他方の前記端部を前記胴部の上側において非接触状態で外方に突出させ、前記コイル部の軸方向と平行に一方の前記端部側に向かうように屈曲し、他方の前記翼部の近傍まで延出して先端を自由端にし、前記コイルバネの他方の前記端部より一方の前記端部まで前記ボルトの前記雄ネジを螺合可能にしてなるので、前記ボルトに螺合した前記蝶ナット体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蝶ナット体の回転を阻止し、前記ボルトの振動などで、前記ボルトに螺合する前記蝶ナット体の緩みを確実に防止できる。
しかも、スペースの少ないプレス蝶ナットでも、前記コイルバネの一方の前記端部を前記雌ネジ溝の加工開始の前記起点の合致する前記蝶ナット体の前記翼部の前記羽片間で挟持させれば、蝶ナットのデッドスペースを有効活用でき、コンパクトなプレス蝶ナットの緩み止め装置を得ることになる。
また、前記コイルバネを囲むような胴部や、前記コイルバネの他方の前記端部を延出させるために胴部を切欠く必要がなく、前記コイルバネの他方の前記端部側は前記胴部の上方において非接触状態になり、前記コイルバネの他方の前記端部に振動が伝わることがなく、前記ボルトの前記雄ネジに対するコイルバネのコイル部の密着が緩むことを確実に防止できる。 The invention according to claim 1 is a wing nut body formed by pressing a metal plate, the wing nut body having a concave body having a bolt through hole in the center and a pair projecting on both sides thereof. A female screw groove into which the male screw of the bolt is screwed into the bolt through-hole, and the starting point of the processing start of the female screw groove is the position of one of the wing parts. A coil spring having a pitch of the coil portion that matches the pitch of the male screw of the bolt is disposed above the body portion, and one end of the coil spring is disposed outward from the outer periphery of the coil portion. Bend toward the other end side in parallel with the axial direction of the coil portion at a position to cover the spacer, and this is between the blades of the wing portion that matches the starting point of the female screw groove. Insert and clamp, and the tip of one of the ends The coil spring is cantilevered in contact with the bottom surface of the body portion, and a space is provided between the body portion of the wing nut body and the other end portion of the coil spring, and the other end of the coil spring is provided. The part protrudes outward in a non-contact state on the upper side of the body part, bends toward the one end part side in parallel with the axial direction of the coil part, and extends to the vicinity of the other wing part Since the male screw of the bolt can be screwed from the other end of the coil spring to the one end of the coil spring, the detachment direction of the wing nut body screwed to the bolt The wing nut body that is in close contact with the male thread of the bolt against rotation of the bolt to prevent the wing nut body from rotating and is screwed into the bolt due to vibration of the bolt or the like Can be surely prevented.
In addition, even with a pressed wing nut with little space, if one end of the coil spring is sandwiched between the blades of the wing portion of the wing nut body where the starting point of the machining start of the female thread groove matches. Therefore, the dead space of the wing nut can be effectively used, and a compact press wing nut locking device can be obtained.
In addition, it is not necessary to cut out the body portion so as to surround the coil spring or the other end portion of the coil spring, and the other end portion side of the coil spring is located above the body portion. In the non-contact state, vibration is not transmitted to the other end portion of the coil spring, and it is possible to reliably prevent the coil portion of the coil spring from loosening against the male screw of the bolt.

この発明のプレス蝶ナットの緩み止め装置における第１の実施形態を示す側面図。The side view which shows 1st Embodiment in the locking device of the press wing nut of this invention. この発明のプレス蝶ナットの緩み止め装置における第１の実施形態を示す平面図。The top view which shows 1st Embodiment in the locking device of the press wing nut of this invention. この発明におけるプレス蝶ナットの平面図。The top view of the press wing nut in this invention. この発明におけるボルトに対するプレス蝶ナットの回転動作状態を示すもので、（ａ）はプレス蝶ナットの締め付け方向への回転動作状態の断面図、（ｂ）はプレス蝶ナットの緩み方向への回転動作状態の断面図。FIG. 2 shows a rotational operation state of a press wing nut with respect to a bolt in the present invention, wherein (a) is a sectional view of the rotational operation state in the tightening direction of the press wing nut, and (b) is a rotational operation in the loosening direction of the press wing nut. Sectional drawing of a state. この発明のプレス蝶ナットの緩み止め装置における第２の実施形態を示す平面図。The top view which shows 2nd Embodiment in the locking device of the press wing nut of this invention. 図５のＡ−Ａ線による断面図。Sectional drawing by the AA line of FIG.

以下、この発明のプレス蝶ナットの緩み止め装置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。  Embodiments of the press wing nut locking device according to the present invention will be described below. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

この発明の実施の形態を、図１および図４に基づいて説明する。図１はプレス蝶ナットの緩み止め装置を実施した一例を示すもので、符号１で示されるものはプレス蝶ナット体である。  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example in which a press wing nut locking device is implemented, and what is denoted by reference numeral 1 is a press wing nut body.

前記プレス蝶ナット体１は、鋼板をプレス加工して形成され、中央に凹状の胴部２とその左右両側に一体絞り成形された翼部４とからなり、被締結部材Ｗに挿入するボルト６に螺合する。  The press wing nut body 1 is formed by pressing a steel plate, and includes a concave body portion 2 in the center and wing portions 4 integrally formed on both the left and right sides thereof, and a bolt 6 to be inserted into a fastened member W. Threaded onto.

前記翼部４は断面Ｕ字状に形成され、一対の羽片４ａ、４ａよりなるとともに、前記胴部２は底面２ａと周縁２ｂとを有し、前記底面２ａにはボルト貫通孔３を開口し、前記周縁２ｂは左右両側の前記羽片４ａ、４ａに連結する。  The wing portion 4 is formed in a U-shaped cross section, and includes a pair of wing pieces 4a and 4a. The body portion 2 has a bottom surface 2a and a peripheral edge 2b, and a bolt through hole 3 is opened in the bottom surface 2a. The peripheral edge 2b is connected to the left and right wing pieces 4a, 4a.

前記ボルト貫通孔３に前記ボルト６の雄ねじ６ａが螺合する雌ネジ溝３ａを形成し、この雌ネジ溝３ａの加工開始の起点３ｂを左右両側の前記翼部４のいずれか一方に合致させる。  A female screw groove 3a into which the male screw 6a of the bolt 6 is screwed is formed in the bolt through hole 3, and the starting point 3b of the processing start of the female screw groove 3a is made to coincide with either one of the left and right wing parts 4. .

前記胴部２の上方にコイルバネ７を配置し、このコイルバネ７は前記ボルト６の前記雄ネジ６ａのピッチに整合するコイル部７ａと、前記コイル部７ａの一方の端部７ｂと、前記コイル部７ａの他方の端部７ｃとを有する。一方の前記端部７ｂは、前記コイル部７ａの外周の外側でコイル部軸方向と平行に屈曲し、他方の前記端部７ｃは、前記コイル部７ａの外周より外側に延出する。前記コイル部７ａの一方の前記端部７ｂには、合成樹脂製よりなる断面円形状のスペーサー７１を被覆する。  A coil spring 7 is disposed above the body 2, and the coil spring 7 includes a coil portion 7 a that matches the pitch of the male screw 6 a of the bolt 6, one end portion 7 b of the coil portion 7 a, and the coil portion. 7a and the other end 7c. One end portion 7b is bent outside the outer periphery of the coil portion 7a in parallel with the axial direction of the coil portion, and the other end portion 7c extends outside the outer periphery of the coil portion 7a. One end portion 7b of the coil portion 7a is covered with a spacer 71 having a circular cross section made of synthetic resin.

前記コイル部７ａのコイル部軸方向と平行な一方の前記端部７ｂを前記起点３ｂに合致する前記翼部４の前記羽片４ａ、４ａ間に前記スペーサー７１を介して挿入し、前記羽片４ａ、４ａをカシメて、一方の前記端部７ｂを挟持して固定端とし、前記コイル部７ａの外周より外側に延出する他方の前記端部７ｃを自由端とする。  The one end portion 7b parallel to the coil portion axial direction of the coil portion 7a is inserted between the blade pieces 4a, 4a of the wing portion 4 matching the starting point 3b via the spacer 71, and the blade pieces 4a and 4a are caulked, one end portion 7b is sandwiched to be a fixed end, and the other end portion 7c extending outward from the outer periphery of the coil portion 7a is a free end.

前記コイル部７ａの一方の前記端部７ｂの先端は、前記胴部２の前記底面２ａに当接させ、前記羽片４ａ、４ａの挟持とともに前記コイルバネ７が傾かないように片持支持し、前記ボルト６を前記蝶ナット体１から前記コイルバネ７まで螺合させる。  The tip of one end portion 7b of the coil portion 7a is brought into contact with the bottom surface 2a of the trunk portion 2, and is cantilevered so that the coil spring 7 is not tilted while sandwiching the wing pieces 4a and 4a. The bolt 6 is screwed from the wing nut body 1 to the coil spring 7.

前記コイル部７ａの他方の前記端部７ｃは、前記胴部２の前記周縁２ｂより外方に非接触状態で突出させ、前記翼部４の近傍まで延出して先端を自由端にする。
なお、他方の前記端部７ｃは、前記周縁２ｂに開口（図示せず）を設け、この開口より前記翼部４の近傍まで延出してもよい。The other end portion 7c of the coil portion 7a protrudes outward from the peripheral edge 2b of the body portion 2 in a non-contact state, extends to the vicinity of the wing portion 4, and has a free end at the tip.
The other end 7c may be provided with an opening (not shown) in the peripheral edge 2b and extend from the opening to the vicinity of the wing part 4.

前記被締結物Ｗを貫挿した前記ボルト６に対して、前記コイルバネ７が前記被締結物Ｗとは反対側に位置するようにして前記蝶ナット体１をネジ込む。
このとき、前記コイルバネ７の他方の前記端部７ｃと前記翼部４とを一緒に指で摘むことにより、前記コイルバネ７の前記コイル部７ａは、一方の前記端部７ｂを支点として外方へ広がり、前記ボルト６の前記雄ネジ６ａの谷に嵌った前記コイルバネ７の素線の摩擦力が軽減され、前記蝶ナット体１は前記ボルト６の前記雄ネジ６ａに円滑にネジ込まれる。The wing nut body 1 is screwed in such a manner that the coil spring 7 is positioned on the opposite side of the fastened object W with respect to the bolt 6 inserted through the fastened object W.
At this time, the other end portion 7c of the coil spring 7 and the wing portion 4 are picked together by a finger so that the coil portion 7a of the coil spring 7 moves outward with the one end portion 7b as a fulcrum. The wing nut body 1 is smoothly screwed into the male screw 6 a of the bolt 6 by spreading and reducing the frictional force of the wire of the coil spring 7 fitted in the valley of the male screw 6 a of the bolt 6.

そして、前記コイルバネ７の他方の前記端部７ｃと前記翼部４との摘みを外すと、前記コイルバネ７の素線の弾性力により前記ボルト６の軸中心に向って押さえ付けられ、前記蝶ナット体１と一緒にネジ込まれた前記コイルバネ７は、図４（ａ）に示すように、前記ボルト６の前記雄ネジ６ａの谷に嵌り込む。  When the other end portion 7c of the coil spring 7 and the blade portion 4 are removed, the coil spring 7 is pressed toward the axial center of the bolt 6 by the elastic force of the wire of the coil spring 7, and the wing nut The coil spring 7 screwed together with the body 1 is fitted into the valley of the male screw 6a of the bolt 6 as shown in FIG.

また、前記コイル部７ａの部分の長さを前記蝶ナット体１の前記雌ネジ溝３ａの部分の長さより長くしたので、この長い部分の前記コイル７の前記コイル部７ａと前記蝶ナット体１の前記雌ネジ溝３ａとが前記ボルト６の前記雄ネジ６ａへの螺合によって一体化しており、締結の際に前記蝶ナット体１がガタつくことがない。  In addition, since the length of the coil portion 7a is longer than the length of the female screw groove 3a of the wing nut body 1, the coil portion 7a of the coil 7 and the wing nut body 1 of this long portion. The female screw groove 3a is integrated by screwing the bolt 6 to the male screw 6a, and the wing nut body 1 does not rattle at the time of fastening.

そして、前記ボルト６の前記雄ネジ６ａに対し前記蝶ナット体１をナット離脱方向に回ろうとしても、前記翼部４の前記羽片４ａ、４ａに前記コイルバネ７の一方の前記端部７ｂが挟持されているため、内径方向に収縮する状態となるように前記コイルバネ７の素線が引っ張られて前記ボルト６の前記雄ネジ６ａを締め付け、強力な緩み止め状態にさせる。このため、前記コイルバネ７と一体となった前記蝶ナット体１は前記コイルバネ７の前記コイル部７ａで回転が阻止されて緩まなくなる。  Even if the wing nut body 1 is rotated in the nut disengagement direction with respect to the male screw 6 a of the bolt 6, one end portion 7 b of the coil spring 7 is formed on the wing pieces 4 a and 4 a of the wing portion 4. Since it is clamped, the element wire of the coil spring 7 is pulled so as to be contracted in the inner diameter direction, and the male screw 6a of the bolt 6 is tightened to make a strong loosening prevention state. For this reason, the wing nut body 1 integrated with the coil spring 7 is prevented from rotating by the coil portion 7a of the coil spring 7 and is not loosened.

前記蝶ナット体１を離脱するときには、他方の前記端部７ｃと前記翼部４とを一緒に指で摘まむと、前記コイルバネ７の前記コイル部７ａが外方へ広がり、図４（ｂ）に示すように、前記ボルト６の前記雄ネジ６ａの谷と、前記コイル部７ａとの密着を解除して摩擦が無くなり、あるいは軽減するなどで自由に回転を許容するようになるから、前記ボルト６の前記雄ネジ６ａを保護しながら簡単に前記蝶ナット体１を回転して前記ボルト６から離脱することができる。  When the wing nut body 1 is detached, if the other end portion 7c and the wing portion 4 are grasped together with a finger, the coil portion 7a of the coil spring 7 spreads outward, as shown in FIG. As shown, the bolt 6 is allowed to rotate freely by releasing the contact between the valley of the male screw 6a of the bolt 6 and the coil portion 7a to eliminate or reduce friction. The wing nut body 1 can be easily rotated and detached from the bolt 6 while protecting the male screw 6a.

次に、第２の実施の形態を、図５および図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.

この第２の実施の形態では、第１の実施の形態で説明している鋼板をプレス加工して形成された蝶ナット体１において、凹状の胴部８の周縁８ｂを六角形とし、これに、雌ネジ溝１０ａを形成した六角ナット１０を嵌合する。  In the second embodiment, in the wing nut body 1 formed by pressing the steel plate described in the first embodiment, the peripheral edge 8b of the concave body portion 8 has a hexagonal shape. The hexagon nut 10 formed with the female screw groove 10a is fitted.

前記前記六角ナット１０は、前記雌ネジ溝１０ａの加工開始の起点（図示せず）が前記蝶ナット体１の左右両側の前記翼部４のいずれか一方に合致するように嵌合される。  The hexagon nut 10 is fitted so that the starting point (not shown) of the processing start of the female screw groove 10a matches either one of the wing parts 4 on the left and right sides of the wing nut body 1.

前記蝶ナット体１の前記胴部８の前記底面８ａに開口した前記ボルト貫通孔９よりボルト（図示せず）を挿通し、これを前記雌ネジ１０ａに螺合して前記蝶ナット体１が締結される。  A bolt (not shown) is inserted through the bolt through hole 9 opened in the bottom surface 8a of the trunk portion 8 of the wing nut body 1, and this is screwed into the female screw 10a so that the wing nut body 1 is It is concluded.

前記蝶ナット体１の前記雌ネジ溝１０ａの部分の長さを長くでき、締結の際に前記蝶ナット体１がガタつくことがなく、しかも、安定した締結力を得ることができる。
なお、前記胴部８の前記周縁８ｂを六角形以外の四角形などにして、これに前記蝶ナット１を嵌合してもよい。The length of the female screw groove 10a of the wing nut body 1 can be increased, the wing nut body 1 does not rattle during fastening, and a stable fastening force can be obtained.
Note that the peripheral edge 8b of the trunk portion 8 may be a quadrangle other than a hexagon, and the wing nut 1 may be fitted thereto.

なお、前記六角ナット１０の上方に配置され、前記ボルトが螺合する前記コイルバネ７については、第１の実施の形態と同一なので説明を省略する。また、第１の実施で形態では、前記コイル部７ａの一方の前記端部７ｂに前記スペーサー７１を被覆するが、第２の実施の形態では、前記コイル部７ａの一方の前記端部７ｂを前記翼部４の前記羽片４ａ、４ａ間に前記スペーサー７１を介さないで挿入し、前記羽片４ａ、４ａをカシメて、一方の前記端部７ｂを挟持して固定端としている。  The coil spring 7 disposed above the hexagon nut 10 and screwed with the bolt is the same as that of the first embodiment, and a description thereof will be omitted. In the first embodiment, one end portion 7b of the coil portion 7a is covered with the spacer 71. In the second embodiment, one end portion 7b of the coil portion 7a is attached to the end portion 7b. The blades 4a and 4a of the wing part 4 are inserted between the blades 4a and 4a without the spacer 71, and the blades 4a and 4a are caulked to sandwich one of the end portions 7b as a fixed end.

以上の構成におけるプレス蝶ナットの緩み止め装置では、前記蝶ナット体１の前記ボルト貫通孔３に形成した前記雌ネジ溝３ａの加工開始の前記起点３ｂを前記蝶ナット体１の前記翼部４に合致させるとともに、前記ボルト６の前記雄ネジ６ａに密着する前記コイルバネ７の一方の前記端部７ｂを前記蝶ナット体１の前記翼部４の前記羽片４ａ、４ａで挟持させることにより、前記ボルト６に対する前記蝶ナット体１の緩み止めが確実にでき、製作が容易で緩み止めの対策にかける費用を低減できる。  In the press butterfly nut locking device having the above-described configuration, the starting point 3b of the processing start of the female thread groove 3a formed in the bolt through-hole 3 of the butterfly nut body 1 is used as the wing portion 4 of the butterfly nut body 1. And the one end portion 7b of the coil spring 7 that is in close contact with the male screw 6a of the bolt 6 is sandwiched between the wing pieces 4a and 4a of the wing portion 4 of the wing nut body 1, The wing nut body 1 can be surely prevented from loosening with respect to the bolt 6, can be easily manufactured, and the cost for the countermeasure against the loosening can be reduced.

また、前記コイルバネ７の前記一端７ｂは前記翼部４の前記羽片４ａ、４ａの全長で挟持され、しかも、前記一端７ｂの先端を前記蝶ナット体１の前記胴部２の前記底面２ａに当接させ、前記コイルバネ７が傾かないように片持支持でき、前記ボルト６を前記蝶ナット体１の前記雌ネジ溝３ａから前記コイルバネ７まで円滑に螺合できる。  Further, the one end 7 b of the coil spring 7 is sandwiched by the entire length of the wing pieces 4 a, 4 a of the wing portion 4, and the tip of the one end 7 b is connected to the bottom surface 2 a of the trunk portion 2 of the wing nut body 1. The bolt 6 can be cantilevered so that the coil spring 7 does not tilt, and the bolt 6 can be smoothly screwed from the female thread groove 3a of the wing nut body 1 to the coil spring 7.

さらに、前記コイルバネ７の他方の前記端部７ｃは前記胴部２の前記周縁２ｂより外方に非接触状態で突出させ、前記翼部４の近傍まで延出して先端を自由端にするので、前記コイルバネ７の他方の前記端部７ｃが前記蝶ナット体１に伝わる振動によって前記コイルバネ７が動くことがなく、前記蝶ナット体１の緩みを確実に防止できる。  Further, the other end portion 7c of the coil spring 7 protrudes outward from the peripheral edge 2b of the body portion 2 in a non-contact state, extends to the vicinity of the wing portion 4 and makes the tip a free end. The coil spring 7 is not moved by the vibration transmitted to the wing nut body 1 by the other end 7c of the coil spring 7, and the wing nut body 1 can be reliably prevented from loosening.

この第１または第２の実施の形態では、前記翼部４の前記羽片４ａ、４ａで挟持された一方の前記端部７ｂが破損したり、変形されることなく自由に緩み止めを解除することができるために、何回でも使用することができる。  In the first or second embodiment, one of the end portions 7b sandwiched between the wing pieces 4a and 4a of the wing portion 4 is freely released from the loosening prevention without being damaged or deformed. Can be used any number of times.

この発明は、ボルトに装着されるプレス蝶ナットの振動等による緩み止めが簡単な構造で、容易に作製できるプレス蝶ナットの緩み止め装置である。  The present invention is a device for preventing a press wing nut from being loosened with a structure that can easily prevent the press wing nut attached to a bolt from being loosened by vibration or the like.

１ 蝶ナット体
２ 凹状の胴部
２ａ 底面
２ｂ 周縁
３ ボルト貫通孔
３ａ 雌ネジ溝
３ｂ 加工開始の起点
４ 翼部
４ａ 羽片
６ ボルト
６ａ 雄ねじ
７ コイルバネ
７ａ コイル部
７ｂ 一方の端部（固定端）
７ｃ 他方の端部（自由端）
７１ スペーサー
８ 胴部
８ａ 底面
８ｂ 周縁
９ ボルト貫通孔
１０ 六角ナット
１０ａ 雌ネジ溝
Ｗ 被締結部材DESCRIPTION OF SYMBOLS 1 Wing nut body 2 Concave body part 2a Bottom face 2b Periphery 3 Bolt through-hole 3a Female thread groove 3b Starting point of processing 4 Wing part 4a Wing piece 6 Bolt 6a Male thread 7 Coil spring 7a Coil part 7b One end (fixed end)
7c The other end (free end)
71 Spacer 8 Body 8a Bottom surface 8b Perimeter 9 Bolt through hole 10 Hexagon nut 10a Female thread groove W Fastened member

Claims (1)

金属板をプレス加工して形成された蝶ナット体であって、この蝶ナット体は中央にボルト貫通孔を有する凹状の胴部と、その両側に突出する一対の羽片を有する翼部とからなり、前記ボルト貫通孔にボルトの雄ネジが螺合する雌ネジ溝を形成し、この雌ネジ溝の加工開始の起点をいずれか一方の前記翼部の位置に合致させ、前記胴部の上方に前記ボルトの前記雄ネジのピッチに整合するコイル部のピッチを有するコイルバネを配置し、前記コイルバネの一方の前記端部を、前記コイル部の外周より外方の位置で前記コイル部の軸方向と平行に他方の前記端部側に向けて屈曲してスペーサーを被覆し、これを前記雌ネジ溝の前記起点と合致する前記翼部の前記羽片間に挿入して挟持し、さらに一方の前記端部の先端を前記胴部の底面に当接して前記コイルバネを片持支持し、前記蝶ナット体の前記胴部と、前記コイルバネの他方の前記端部との間に間隔を設け、前記コイルバネの他方の前記端部を前記胴部の上側において非接触状態で外方に突出させ、前記コイル部の軸方向と平行に一方の前記端部側に向かうように屈曲し、他方の前記翼部の近傍まで延出して先端を自由端にし、前記コイルバネの他方の前記端部より一方の前記端部まで前記ボルトの前記雄ネジを螺合可能にしてなることを特徴とするプレス蝶ナットの緩み止め装置。A wing nut body formed by pressing a metal plate, and the wing nut body includes a concave trunk portion having a bolt through hole in the center and a wing portion having a pair of wing pieces projecting on both sides thereof. A female screw groove into which the male screw of the bolt is screwed is formed in the bolt through hole, and the starting point of processing of the female screw groove is matched with the position of one of the wing parts, A coil spring having a pitch of a coil portion that matches the pitch of the male screw of the bolt is arranged, and one end portion of the coil spring is disposed at a position outside the outer periphery of the coil portion in the axial direction of the coil portion. Bend toward the other end side in parallel with the spacer to cover the spacer, and insert it between the wing pieces of the wing part that matches the starting point of the female screw groove, The tip of the end is in contact with the bottom of the barrel The coil spring is cantilevered, and a space is provided between the body portion of the wing nut body and the other end portion of the coil spring, and the other end portion of the coil spring is not positioned above the body portion. Projecting outward in a contact state, bending toward one of the end portions in parallel to the axial direction of the coil portion, extending to the vicinity of the other wing portion, making the tip a free end, and the coil spring An apparatus for preventing loosening of a press wing nut, wherein the male screw of the bolt can be screwed from the other end portion of the bolt to the one end portion.
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