JP3252039B2 - Bolt loosening torque reduction structure - Google Patents
Bolt loosening torque reduction structureInfo
- Publication number
- JP3252039B2 JP3252039B2 JP27553693A JP27553693A JP3252039B2 JP 3252039 B2 JP3252039 B2 JP 3252039B2 JP 27553693 A JP27553693 A JP 27553693A JP 27553693 A JP27553693 A JP 27553693A JP 3252039 B2 JP3252039 B2 JP 3252039B2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- auxiliary
- mounting body
- insertion hole
- bolts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Connection Of Plates (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は，取付け体との間に被締
結物を挟持する係合部が，前記取付け体に螺合する雄ね
じを外周に有する軸部の一端に設けられるボルトの緩め
トルクを低減するためのボルトの緩めトルク低減構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for loosening a bolt provided at one end of a shaft portion having an external thread on its outer periphery for engaging an object to be fastened with a mounting member. The present invention relates to a bolt loosening torque reduction structure for reducing torque.
【０００２】[0002]
【従来の技術】ボルトを用いて被締結物を取付け体に強
固に締結した状態で，分解，修理等のためにボルトを取
外す必要を生じることがあるが，そのボルトのねじ部等
が錆付いたり，焼付いたりしてボルトが簡単には緩まな
いことがある。2. Description of the Related Art When an object to be fastened is firmly fastened to a mounting body using a bolt, it may be necessary to remove the bolt for disassembly, repair, or the like. ， The bolts may not be easily loosened due to seizure.
【０００３】この場合，従来ではボルトに強大な緩めト
ルクを加えて緩めるか，それでも緩まない場合にはボル
トの頭部をカッタ等で削り取ったり，バーナーで焼き切
ったりするようにしている。In this case, conventionally, a large loosening torque is applied to the bolt to loosen it, or if the bolt is not loosened yet, the head of the bolt is scraped off with a cutter or the like or burned off with a burner.
【０００４】[0004]
【発明が解決しようとする課題】ところが，上記従来の
ようにすると，ボルトの緩め作業が非常に面倒であるば
かりでなく，その作業によって被締結物が損傷してしま
うことがあり，締結状態解除後に被締結物を補修する必
要が生じたり，場合によっては被締結物の再使用が不可
能となることがあり，全体として作業能率が低くてコス
トが嵩み，また資源の浪費にもなっていた。However, according to the above-mentioned conventional method, not only is the work of loosening the bolt extremely troublesome, but also the work may be damaged by the work, and the fastening state is released. It may be necessary to repair the work later, or in some cases it may not be possible to reuse the work, resulting in lower work efficiency, higher costs, and waste of resources. Was.
【０００５】本発明は，かかる事情に鑑みてなされたも
のであり，ボルト緩め作業を小さな緩めトルクで容易か
つ迅速に行ない得るようにして上記問題を解決したボル
トの緩めトルク低減構造を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bolt loosening torque reducing structure which solves the above-mentioned problem by enabling the bolt loosening operation to be easily and quickly performed with a small loosening torque. With the goal.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に，請求項１の発明は，取付け体との間に被締結物を挟
持する係合部が，前記取付け体に螺合する雄ねじを外周
に有する軸部の一端に設けられるボルトの緩めトルクを
低減するためのボルトの緩めトルク低減構造において，
ボルトには，少なくとも軸方向に沿う一部を被締結物に
対応させた挿通孔部と，該挿通孔部の一端に連なってボ
ルトの軸方向外方に臨む係止部と，ボルトの取付け体へ
の螺合開始点よりもボルトの他端側で前記挿通孔部の他
端に一端が連設されるとともに他端が外方に開放された
ねじ孔部とが同軸に設けられ，挿通孔部に挿通される補
助ボルトを，該補助ボルトの頭部がボルト内に収まり且
つ前記係止部に係合するまで前記ねじ孔部に予め螺合さ
せた状態で，ボルトが被締結物を貫通して取付け体にね
じ締めされ，そのねじ締めによって該ボルト及び補助ボ
ルトに共に軸方向引張力が作用するようにしたことを特
徴とする。In order to achieve the above-mentioned object, according to the first aspect of the present invention, an engaging portion for clamping an object to be fastened to a mounting member has a male screw screwed to the mounting member. In the bolt loosening torque reduction structure for reducing the bolt loosening torque provided at one end of the shaft portion on the outer periphery,
The bolt has an insertion hole portion at least a part of which extends along the axial direction corresponding to the object to be fastened, a locking portion connected to one end of the insertion hole portion and facing outward in the axial direction of the bolt, and a bolt mounting member. One end is connected to the other end of the insertion hole at the other end of the bolt from the screwing start point to the screw hole, and the other end of the bolt is coaxially provided with a screw hole having the other end opened outward. The auxiliary bolt inserted into the bolt, the head of the auxiliary bolt fits into the bolt and
It engaged previously threaded into the threaded hole One until it engages with the locking portion
In a state in which, I to the mounting body bolt through the fastened object
The bolts and auxiliary bolts are tightened.
The axial tension force acts on both the bolt and the bolt .
【０００７】また請求項２の発明は，請求項１の発明の
前記特徴に加えて，前記補助ボルトが前記ボルトよりも
高剛性の材料で形成されることを特徴とする。 [0007] The invention of claim 2 is the invention of claim 1.
In addition to the above features, the auxiliary bolt is
It is characterized by being formed of a highly rigid material.
【０００８】[0008]
【実施例】以下，図面により本発明の実施例について説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】先ず本発明の第１実施例を示す図１におい
て，ボルトＢ1 は，スパナ等の回転操作工具を係合可能
として横断面略正六角形に形成される係合部３1 が軸部
２1の一端に一体に連設され，該軸部２1 の少なくとも
他端側外周に雄ねじ１が設けられて成るものである。該
ボルトＢ1 により被締結物４が取付け体５に締着される
ものであり，取付け体５にはねじ孔６が設けられ，被締
結物４には，ボルトＢ1 の軸部２1 を挿通させる挿通孔
７が設けられる。而して挿通孔７に挿通された軸部２1
の雄ねじ１をねじ孔６に螺合して締付けることにより，
被締結物４は，ボルトＢ1 の係合部３1 および取付け体
５間に挟持され，これにより被締結物４が取付け体５に
締着されることになる。[0009] First, in FIG. 1 showing a first embodiment of the present invention, the bolt B 1 represents the engaging portion 3 1 a shaft portion which is formed a rotation operation tool such as a spanner in the cross section substantially regular hexagon as engageable is integrally connected to the 2 1 end, those formed by the external thread 1 is provided at least on the other end side outer circumference of the shaft portion 2 1. Are those fastened object 4 by the bolt B 1 is being fastened to the mounting member 5, screw holes 6 are provided in the mounting member 5, the fastened object 4, the shaft portion 2 1 of the bolt B 1 An insertion hole 7 to be inserted is provided. Thus, the shaft portion 2 1 inserted through the insertion hole 7
By screwing the male screw 1 into the screw hole 6 and tightening it,
The fastened object 4 is sandwiched between the engaging portion 3 1 and the mounting body 5 of the bolt B 1, the fastened object 4 is to be fastened to the mounting member 5 thereby.
【００１０】ボルトＢ1 には両端を開放した締付け孔８
が同軸に設けられる。この締付け孔８は，横断面円形の
挿通孔部９と，ボルトＢ1 の係合部３1 側で挿通孔部９
の一端に同軸に連設される係止部１０と，挿通孔部９の
他端に同軸に連設されるねじ孔部１１とで構成されるも
のであり，係止部１０は，軸方向外方に臨む横断面円形
の凹部として形成される。また挿通孔部９が設けられる
範囲Ａは，該挿通孔部９の少なくとも軸方向に沿う一部
が被締結物４に対応させるように設定され，ボルトＢ1
における雄ねじ１の取付け体５への螺合開始点Ｐ1 すな
わち取付け体５におけるねじ孔６の被締結物４側端部よ
りもボルトＢ1 の他端側にずれた位置Ｐ2 で，ねじ孔部
１１が前記挿通孔部９の他端に連設される。[0010] the bolt B 1 is tightening was open at both ends hole 8
Are provided coaxially. The fastening holes 8, cross-section and a circular insertion hole 9, the bolt B insertion hole 9 in the first engaging portion 3 1 side
And a screw hole 11 coaxially connected to the other end of the insertion hole 9. The locking portion 10 is formed in the axial direction. It is formed as a recess having a circular cross section facing outward. The range A in which the insertion hole 9 is provided is set so that at least a part of the insertion hole 9 along the axial direction corresponds to the workpiece 4 and the bolt B 1
At the screwing start point P 1 of the male screw 1 to the mounting body 5 at the position P 2, that is, at the position P 2 which is shifted to the other end of the bolt B 1 from the end of the screw hole 6 of the mounting body 5 on the workpiece 4 side. The part 11 is provided continuously to the other end of the insertion hole part 9.
【００１１】締付け孔８には補助ボルト１２が挿入され
る。この補助ボルト１２は，係止部１０に係合される頭
部１３が，ねじ孔部１１に螺合される雄ねじ１４を一端
側外周に有する軸部１５の他端に一体に設けられて成る
ものであり，頭部１３の端面には，該補助ボルト１２を
回転操作するための工具を係合するための横断面正六角
形状の係合凹部１６が設けられる。また補助ボルト１２
の頭部１３は，該補助ボルト１２の雄ねじ１４をボルト
Ｂ 1 のねじ孔部１１にねじ込んだ状態で，該ボルト１２
1 内に収まっていて，その外面よりはみ出していない。 An auxiliary bolt 12 is inserted into the tightening hole 8. The auxiliary bolt 12 has a head portion 13 engaged with the locking portion 10 integrally provided on the other end of a shaft portion 15 having an external thread 14 screwed into the screw hole portion 11 on one end side outer periphery. An engagement recess 16 having a regular hexagonal cross section for engaging a tool for rotating the auxiliary bolt 12 is provided on an end face of the head 13. In addition, auxiliary bolt 12
The head 13 of the auxiliary bolt 12
In state screwed in the screw hole portion 11 of the B 1, the bolt 12
It fits within 1 and does not protrude beyond its outer surface.
【００１２】而して，ボルトＢ1 を締付けて被締結物４
を取付け体５に締着する前に，補助ボルト１２は，その
頭部１３をボルト１２ 1 内に収め且つ係止部１０に係止
させるまでねじ孔部１１に予め螺合されており，その状
態で被締結物４を貫通するボルトＢ1 が取付け体５に螺
合して締付けられる。Then, the bolt B 1 is tightened and the object 4
Before fastening the mounting body 5, the auxiliary bolt 12 is engaged in advance with the threaded hole 11 to be engaged the head portion 13 to the matches and the engaging portion 10 to the bolt 12 1, the In this state, the bolt B 1 that penetrates the workpiece 4 is screwed into the mounting body 5 and tightened.
【００１３】このような構造により，ボルトＢ1 が雄ね
じ１の錆付きや焼付き等に起因して通常の緩めトルクで
は簡単に緩まない場合にも，比較的小さな緩めトルクで
容易かつ迅速にボルトＢ1 を緩めることが可能となる。
すなわち補助ボルト１２をその頭部１３が係止部１０に
係止するまでねじ孔部１１に予め螺合している状態に在
るボルトＢ1 の締付け時に，ボルトＢ1 および補助ボル
ト１２にはともに引張力が作用して軸方向に伸びた状態
に在り，その状態で補助ボルト１２を緩めて取外すと，
補助ボルト１２が分担していた引張力の分もボルトＢ1
が負担するようになり，ボルトＢ1 に作用する引張力が
大きくなってボルトＢ1 を軸方向により伸ばすことにな
る。しかも，係止部１０およびねじ孔部１１間すなわち
挿通孔部９が設けられる範囲Ａは，その少なくとも一部
が被締結物４に対応させるように設定されるので，ボル
トＢ1 の係止部１０およびねじ孔部１１間が軸方向に伸
びることにより，ボルトＢ1 から被締結物４に作用する
締結力を低下させることができ，それにより，ボルトＢ
1 の係合部３1 および被締結物４間に作用する摩擦力，
ならびにボルトＢ1 の軸部２1 と取付け体５のねじ孔６
との螺合部に作用する摩擦力が低下することになり，比
較的小さな緩めトルクでもボルトＢ1 を容易に緩めるこ
とができる。したがってボルトＢ1 の緩め作業を，その
作業中に被締結物４を損傷することなく，簡単迅速に行
なうことが可能となる。[0013] With such a structure, when the bolt B 1 is not easily come loose in normal release torque due to such with rust with or burn of the male screw 1 is also relatively easily and quickly with a small release torque bolt B 1 it is possible to loosen the.
That is, when the bolt B 1 is screwed into the screw hole 11 in advance until the head 13 of the auxiliary bolt 12 is locked to the locking portion 10, the bolt B 1 and the auxiliary bolt 12 are not tightened. Both are in the state of being extended in the axial direction by the action of tensile force. In this state, if the auxiliary bolt 12 is loosened and removed,
The amount of the tensile force that the auxiliary bolt 12 shared was also changed to the bolt B 1.
There comes to bear tensile force acting on the bolt B 1 is made to extend the bolt B 1 by an axial increased. Moreover, the range A where the locking portion 10 and the screw hole portion 11 between That insertion hole 9 is provided, so that at least a part of which is set so as to correspond to the fastened object 4, the locking portion of the bolt B 1 by between 10 and threaded hole 11 extending in the axial direction, it is possible to reduce the fastening force applied from the bolt B 1 in the fastened object 4, thereby, the bolt B
Frictional force acting between the first engaging portion 3 1 and the fastened object 4,
And screw holes 6 of the shaft portion 2 1 a mount 5 of the bolt B 1
Will be reduced frictional force acting on the threaded portion of the can loosen the bolt B 1 easily even at relatively small release torque. Thus the loosening of the bolt B 1, without damaging the fastened object 4 in the work, it is possible to perform easily quickly.
【００１４】しかも締付け孔８は，その両端を開放した
貫通孔としてボルトＢ1 に設けられるものであり，ボル
トＢ1 における軸部２1 の先端側で開口するようにして
ねじ孔部１１が軸部２1 に設けられるので，ねじ加工が
容易である。[0014] Moreover fastening aperture 8, which is provided to the bolt B 1 as a through hole which is open both ends thereof, a screw hole portion 11 so as to be opened by the shaft portion 2 1 of the tip side of the bolt B 1 is axial because provided part 2 1, it is easy to screw machining.
【００１５】ところで，ボルトＢ1 の取付け体５への螺
合，締付け時に，雄ねじ１の取付け体５への螺合開始点
Ｐ1 すなわちねじ孔６の被締結物４側端部で締付け応力
が高くなるものであるが，雄ねじ１の取付け体５への螺
合開始点Ｐ1 からボルトＢ1の他端側すなわち係合部３
1 とは反対側にずれた位置Ｐ2 でねじ孔部１１が挿通孔
部９に連設されるので，締付け応力が高くなる部分にね
じ孔部１１が存在することによるボルトＢ1 の強度低下
を防止することができる。By the way, when the bolt B 1 is screwed into the mounting body 5 and tightened, the tightening stress is applied at the screwing start point P 1 of the male screw 1 to the mounting body 5, that is, at the end of the screw hole 6 on the workpiece 4 side. is made high, the other end i.e. the engaging portion 3 of the bolt B 1 of screwing start point P 1 to the mounting body 5 of the male screw 1
Since the screw hole portion 11 is provided continuously to the insertion hole 9 at a position P 2 shifted to the opposite side of the 1, reduction in the strength of the bolt B 1 due to the threaded holes 11 in the portion where tightening stress is increased are present Can be prevented.
【００１６】しかも補助ボルト１２を，ボルトＢ1 に比
べて剛性強度の高い材料により形成しておくと，被締結
物４の締結に伴う軸力の負担を補助ボルト１２に持たせ
ることができるので，該補助ボルト１２を緩めることに
よりボルトＢ1 に大きな軸力を作用させてボルトＢ1 の
伸び量を大きくし，ボルトＢ1 の緩めトルクをより低減
することが可能である。[0016] Moreover the auxiliary bolts 12, the previously formed material having a higher rigidity and strength compared to the bolt B 1, since it is possible to have the burden of axial force caused by the fastening of the fastened object 4 in the auxiliary bolt 12 , by the action of a large axial force in the bolt B 1 by loosening the auxiliary bolt 12 by increasing the elongation of the bolt B 1 and it is possible to further reduce the release torque of the bolt B 1.
【００１７】図２は本発明の第２実施例を示すものであ
り，上記第１実施例に対応する部分には同一の参照符号
を付す。FIG. 2 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are denoted by the same reference numerals.
【００１８】ボルトＢ2 は，軸部２2 の一端に係合部３
2 としてのナットが螺合されて成るものであり，軸部２
2 の一端側外周には前記係合部３2 を螺合させる雄ねじ
１７が刻設され，軸部２2 の他端側外周には，取付け体
５のねじ孔６に螺合する雄ねじ１が刻設される。The bolts B 2, the engaging portion 3 at one end of the shaft portion 2 2
The nut 2 is screwed into the shaft 2
The second end side outer periphery is externally threaded 17 engraved screwing the engaging portion 3 2, the other end periphery of the shaft portion 2 2, the male screw 1 to be screwed into the screw hole 6 of the mounting body 5 Engraved.
【００１９】このボルトＢ2 における軸部２2 には，上
記第１実施例と同様に両端を開放した締付け孔８が同軸
に設けられ，締付け孔８に挿入された補助ボルト１２が
その頭部１３が係止部１０に係合するまでねじ孔部１１
に予め螺合された状態で，ボルトＢ2 の係合部３2 を締
付けて被締結物４が取付け体５に締着される。[0019] The shaft portion 2 2 in the bolt B 2, the first embodiment and the fastening hole 8 opened at both ends in the same manner are provided coaxially, the auxiliary bolt 12 inserted into the clamping hole 8 is its head Until the screw holes 13 engage with the locking portions 10.
Advance screwed state, the fastened object 4 by tightening the engaging portion 3 2 of the bolt B 2 is fastened to the mounting body 5 in.
【００２０】この第２実施例によっても，ボルトＢ2 を
緩めるときには補助ボルト１２を緩めることにより，上
記第１実施例と同様の降下を奏することができる。[0020] The second embodiment also, by loosening the auxiliary bolt 12 when loosening the bolts B 2, it is possible to achieve the same descent as the first embodiment.
【００２１】以上，本発明の実施例を詳述したが，本発
明は上記実施例に限定されるものではなく，特許請求の
範囲に記載された本発明を逸脱することなく種々の設計
変更を行なうことが可能である。Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.
【００２２】たとえばボルトＢ1 ，Ｂ2 の係合部３1 ，
３2 側にねじ孔部１１が設けられた締付け孔８がボルト
Ｂ1 ，Ｂ2 に設けられるようにしてもよい。[0022] For example a bolt B 1, the engaging portion 3 1 of the B 2,
3 fastening aperture 8 threaded hole 11 is provided in two side may be provided on the bolt B 1, B 2.
【００２３】[0023]
【発明の効果】以上のように，本発明によれば，ボルト
には，少なくとも軸方向に沿う一部を被締結物に対応さ
せた挿通孔部と，該挿通孔部の一端に連なってボルトの
軸方向外方に臨む係止部と，ボルトの取付け体への螺合
開始点よりもボルトの他端側で前記挿通孔部の他端に一
端が連設されるとともに他端が外方に開放されたねじ孔
部とが同軸に設けられ，挿通孔部に挿通される補助ボル
トを，該補助ボルトの頭部がボルト内に収まり且つ前記
係止部に係合するまで前記ねじ孔部に予め螺合させた状
態で，ボルトが被締結物を貫通して取付け体にねじ締め
され，そのねじ締めによって該ボルト及び補助ボルトに
共に軸方向引張力が作用するようにしたので，ボルトを
取付け体に対し緩める時に，予め補助ボルトをボルトに
対し緩めることにより，少なくとも被締結物に対応する
部分でボルトの一部を軸方向に伸ばして緩めトルクを低
減することができる。またねじ孔部のねじ加工を容易と
するとともに，ボルトの取付け体への螺合，締付けに伴
って締付け応力が高くなる部分にねじ孔部が存在するこ
とを回避してボルトの強度低下を防止することができ
る。さらに補助ボルトをボルトに螺合した状態で，該補
助ボルトの頭部が該ボル ト内にあるため，ボルトの締付
作業において補助ボルトが邪魔にならず，また補助ボル
トの損傷防止に有効である また特にボルトに上記伸び変
形を与えるに当たっては，ボルト締付前にボルトと螺合
しボルト締付時にボルトと共に軸方向引張力を受ける補
助ボルトを，ボルトの緩め作業前に単に緩めるだけでよ
く，加圧流体を用いた加圧手段をボルト内外に特別に設
ける必要がないことから，全体として設備コストの節減
に大いに寄与し得ると共に機動性が頗る良好であり，そ
の上，ボルト緩め作業を比較的小さな作業スペースで簡
単且つ的確に行うことができる。さらにボルトに対し補
助ボルトを単に緩めるだけでよいから，ボルト周辺部
（例えば被締結物の表面）を傷つけたり凹ませたりする
虞れはない。 As described above, according to the present invention, the bolt has an insertion hole portion at least a part of which extends along the axial direction corresponding to the workpiece, and a bolt connected to one end of the insertion hole portion. And one end is connected to the other end of the insertion hole at the other end of the bolt from the point at which the bolt is screwed into the mounting body, and the other end is connected to the outside. And an auxiliary bolt inserted through the insertion hole is inserted into the screw hole until the head of the auxiliary bolt fits into the bolt and engages with the locking portion. screwing advance screwed allowed state, the mounting body bolts through the fastened object to
The bolts and auxiliary bolts
Both bolts are made to work in the axial direction.
Before loosening against the mounting body, attach the auxiliary bolt to the bolt in advance.
By loosening against, Ru can be reduced torque loosen stretched part of the bolt at the portion corresponding to at least the fastened object in the axial direction. In addition to facilitating the threading of the screw holes, it also prevents the screw holes from being present in the areas where the tightening stress increases as the screws are screwed into the mounting body and tightened, thereby preventing the strength of the bolts from decreasing. can do. Further, with the auxiliary bolt screwed into the bolt,
Since the head of the auxiliary bolt is in said bolt, the bolt tightening
The auxiliary bolts do not interfere with the work, and
Is effective in the door of the damage prevention also the growth change in particular bolt
Before giving the shape, screw it with the bolt before tightening it.
When the bolt is tightened, the bolt receives an axial tensile force with the bolt.
Just loosen the auxiliary bolt before loosening the bolt.
The pressurizing means using pressurized fluid is specially installed inside and outside the bolt.
Equipment costs as a whole
And the mobility is very good.
And the work of loosening bolts can be simplified with a relatively small work space.
It can be simply and accurately performed. In addition, the bolt
It is sufficient to simply loosen the auxiliary bolts.
(Eg, the surface of the workpiece) is damaged or dented
There is no fear.
【００２４】また特に請求項２記載の発明によれば，補
助ボルトがボルトよりも高剛性の材料で形成されるの
で，ボルトによる被締結物締付けに伴う軸力の負担を主
として補助ボルトに持たせることができ，従って補助ボ
ルトを緩めたときにボルトに十分な引張応力を作用させ
て該ボルトを効果的に伸び変形させることができるた
め，ボルトの緩めトルク低減効果が高められる。 According to the second aspect of the present invention,
The auxiliary bolt is made of a material that is more rigid than the bolt
The main purpose is to reduce the load on the axial
The auxiliary bolt can be held as
When the bolt is loosened, apply sufficient tensile stress to the bolt.
The bolt can be effectively stretched and deformed.
Therefore, the effect of reducing bolt loosening torque is enhanced.
【図１】第１実施例の縦断側面図である。FIG. 1 is a vertical sectional side view of a first embodiment.
【図２】第２実施例の縦断側面図である。FIG. 2 is a longitudinal sectional side view of a second embodiment.
１・・・雄ねじ ２1 ，２2 ・・・軸部 ３1 ，３2 ・・・係合部 ４・・・被締結物 ５・・・取付け体 ９・・・挿通孔部 １０・・・係止部 １１・・・ねじ孔部 １２・・・補助ボルト １３・・・頭部 Ｂ1 ，Ｂ2 ・・・ボルト1 ... external thread 2 1, 2 2 ... shaft portion 3 1, 3 2 ... engaging portion 4 ... fastened object 5 ... mounting body 9 ... insertion hole 10 ... locking portion 11 ... screw hole part 12 ... auxiliary bolt 13 ... head B 1, B 2 ... bolt
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 春幸 岐阜県岐阜市中屋東238 (72)発明者 直井 学 岐阜県各務原市蘇原新栄町３−７ (56)参考文献 特開 平５−118314（ＪＰ，Ａ) 特開 平６−42517（ＪＰ，Ａ) 特開 平６−159341（ＪＰ，Ａ) 実開 昭56−143613（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16B 31/04 F16B 35/00 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Haruyuki Watanabe 238 Nakaya Higashi, Gifu City, Gifu Prefecture (72) Inventor Manabu Naoi 3-7, Sohara Shineimachi, Kakamigahara City, Gifu Prefecture (56) References JP-A-5-118314 (JP, a) JP flat 6-42517 (JP, a) JP flat 6-159341 (JP, a) JitsuHiraku Akira 56-143613 (JP, U) (58 ) investigated the field (Int.Cl. 7 , DB name) F16B 31/04 F16B 35/00
Claims (2)
を挟持する係合部（３1 ，３2 ）が，前記取付け体
（５）に螺合する雄ねじ（１）を外周に有する軸部（２
1 ，２2 ）の一端に設けられるボルト（Ｂ1 ，Ｂ2 ）の
緩めトルクを低減するためのボルトの緩めトルク低減構
造において， ボルト（Ｂ1 ，Ｂ2 ）には，少なくとも軸方向に沿う一
部を被締結物（４）に対応させた挿通孔部（９）と，該
挿通孔部（９）の一端に連なってボルト（Ｂ1，Ｂ2 ）
の軸方向外方に臨む係止部（１０）と，ボルト（Ｂ1 ，
Ｂ2 ）の取付け体（５）への螺合開始点よりもボルト
（Ｂ1 ，Ｂ2 ）の他端側で前記挿通孔部（９）の他端に
一端が連設されるとともに他端が外方に開放されたねじ
孔部（１１）とが同軸に設けられ，挿通孔部（９）に挿
通される補助ボルト（１２）を，該補助ボルト（１２）
の頭部（１３）がボルト（Ｂ 1 ，Ｂ 2 ）内に収まり且つ
前記係止部（１０）に係合するまで前記ねじ孔部（１
１）に予め螺合させた状態で，ボルト（Ｂ1 ，Ｂ2 ）が
被締結物（４）を貫通して取付け体（５）にねじ締めさ
れ，そのねじ締めによって該ボルト（Ｂ 1 ，Ｂ 2 ）及び
補助ボルト（１２）に共に軸方向引張力が作用するよう
にしたことを特徴とする，ボルトの緩めトルク低減構
造。1. An object (4) to be fastened between the mounting body (5) and the mounting body (5).
An engaging portion (3 1 , 3 2 ) for sandwiching a shaft portion (2) having an external thread (1) on its outer periphery screwed to the mounting body (5).
In 1, 2 2) release torque reduction structure of the bolt to reduce the release torque of the bolt provided at one end (B 1, B 2) of the bolt (B 1, B 2) are, along at least the axial direction insertion hole which is corresponding to a portion of the fastened object (4) and (9), continuous with one end of the insertion hole portion (9) volt (B 1, B 2)
And a bolt (B 1 ,
One end is connected to the other end of the insertion hole (9) at the other end of the bolt (B 1 , B 2 ) from the starting point of screwing the B 2 ) into the mounting body (5). The auxiliary bolt (12) is provided coaxially with a screw hole (11) that is opened outward , and the auxiliary bolt (12) inserted through the insertion hole (9) is connected to the auxiliary bolt (12).
The screw hole portion to the head portion (13) of engaging the bolts (B 1, B 2) in the fit and <br/> the locking portion (10) (1
In a state where the pre-screwed in 1), bolts (B 1, B 2) is of tightening screws in the mounting body (5) through the fastened object (4)
The bolts (B 1 , B 2 ) and
Axial tension force acts on both auxiliary bolts (12).
A bolt loosening torque reduction structure, characterized by:
（Ｂ 1 ，Ｂ 2 ）よりも高剛性の材料で形成されることを
特徴とする，請求項１に記載のボルトの緩めトルク低減
構造。 2. The method according to claim 1, wherein said auxiliary bolt (12) is provided with said bolt.
(B 1 , B 2 )
The bolt loosening torque reduction according to claim 1, characterized in that:
Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27553693A JP3252039B2 (en) | 1993-11-04 | 1993-11-04 | Bolt loosening torque reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27553693A JP3252039B2 (en) | 1993-11-04 | 1993-11-04 | Bolt loosening torque reduction structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07127620A JPH07127620A (en) | 1995-05-16 |
| JP3252039B2 true JP3252039B2 (en) | 2002-01-28 |
Family
ID=17556821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27553693A Expired - Fee Related JP3252039B2 (en) | 1993-11-04 | 1993-11-04 | Bolt loosening torque reduction structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3252039B2 (en) |
-
1993
- 1993-11-04 JP JP27553693A patent/JP3252039B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07127620A (en) | 1995-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110494661B (en) | Fastening structure | |
| JP2001520726A (en) | Free rotation predominant torque nut | |
| ZA200502409B (en) | Split lock screw fastener assembly and method. | |
| US6019556A (en) | Locking fastener assembly | |
| JPH06159345A (en) | Loosening prevention screw | |
| JP3569562B2 (en) | Bolt loosening torque reduction structure and loosening method | |
| JP3252039B2 (en) | Bolt loosening torque reduction structure | |
| EP1498616B1 (en) | Securing spaced elements to one another | |
| GB2341654A (en) | Locking threaded elements | |
| JP3252038B2 (en) | Bolt loosening torque reduction structure | |
| KR20010077809A (en) | Bolt assembly for unfastening prevention | |
| JP2024516276A (en) | Mounting structure for a hook shock absorber that can be pushed up with small tightening torque in a compact space | |
| JP3569563B2 (en) | Bolt loosening torque reduction structure and loosening method | |
| JP2001065533A (en) | Loosening prevention bolt | |
| JP2001248623A (en) | Bolt tightening structure | |
| JP2003301829A (en) | Bolt-nut locking structure | |
| KR200197004Y1 (en) | Bolt assembly for unfastening prevention | |
| EP0634583A1 (en) | Means for locking a nut on a bolt | |
| JP2003239934A (en) | Nut for maintaining fastening force | |
| JP3052547U (en) | Nut loosening stopper | |
| KR20230173946A (en) | Anti-loosening leaf spring nut | |
| JP3436643B2 (en) | Bolt rotation prevention structure | |
| KR200183855Y1 (en) | Tap Bolt with Anchor Mears | |
| JPH0577610U (en) | Lock nut | |
| JP2000240632A (en) | Lock nut |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |