JP4552199B2 - Nut body opening prevention tool - Google Patents

Nut body opening prevention tool Download PDF

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JP4552199B2
JP4552199B2 JP2005286990A JP2005286990A JP4552199B2 JP 4552199 B2 JP4552199 B2 JP 4552199B2 JP 2005286990 A JP2005286990 A JP 2005286990A JP 2005286990 A JP2005286990 A JP 2005286990A JP 4552199 B2 JP4552199 B2 JP 4552199B2
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proximity
nut body
state
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nut
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昭八 清水
裕一 川村
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Mirai Kogyo KK
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Description

本発明は、構造体に既設されたボルト体の軸側方から塑性変形により取着可能なナット体の開きを防止するナット体開き防止具に関する。 The present invention relates to a nut body opening preventer that prevents opening of a nut body that can be attached by plastic deformation from the axial side of a bolt body that is already installed in a structure.

上記のようなナット体、ナット体開き防止具については、特許文献1に記載のものがあり、図8にこれらを示す。 About the above nut bodies and nut body opening prevention tools, there exists a thing of patent documents 1, and these are shown in FIG.

図8(a)のナット体開き防止具25は、ボルト体Bに沿って塑性変形し、その本体部26aが螺合して取着された状態のナット体26の近接部26cが相互に離間して開くのを防止すべく、この近接部26cの外側に係合する係合部21を備えている。 8A is plastically deformed along the bolt body B, and the adjacent portions 26c of the nut body 26 in a state where the main body portion 26a is screwed and attached are separated from each other. In order to prevent it from being opened, an engaging portion 21 that engages with the outside of the proximity portion 26c is provided.

図8(b)のナット体開き防止具35も、ボルト体Bに沿って塑性変形し、その本体部36aが螺合して取着された状態のナット体36の近接部36cが相互に離間して開くのを防止すべく、この近接部36cの外側に係合する係合部31を備えている。 The nut body opening preventer 35 in FIG. 8B is also plastically deformed along the bolt body B, and the adjacent portions 36c of the nut body 36 in a state where the main body portion 36a is screwed and attached are separated from each other. In order to prevent it from being opened, an engaging portion 31 that engages with the outside of the proximity portion 36c is provided.

しかしながら、いずれのナット体開き防止具25、35においても、その係合部21、31は、その片側が開口し、あるいは閉止連結されていないものであるため、ナット体26、36の近接部26c、36cを離間させるような大きな力が作用した場合、ナット体26、36とボルト体Bの取着状態が解除されることとなり、改善が望まれていた。
国際公開公報WO03−042556号公報(図16、図18)
However, in any of the nut body opening preventers 25 and 35, the engaging portions 21 and 31 are open on one side or are not closed and connected, so the proximity portions 26c of the nut bodies 26 and 36 are not connected. , 36c is applied, a state where the nut bodies 26, 36 and the bolt body B are attached is released, and improvement has been desired.
International Publication No. WO03-042556 (FIGS. 16 and 18)

本発明は、上記の問題を解決しようとするものであり、取着状態のナット体にセットすれば、その近接部が開くのを確実に防止することができるナット体開き防止具を提供することを目的とする。 The present invention is intended to solve the above-described problem, and provides a nut body opening prevention device that can reliably prevent the proximity portion from opening if it is set to an attached nut body. With the goal.

請求項1記載のナット体開き防止具は、ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記凹状部は、前記上端部及び下端部の側面にそれぞれ当接する部分を有しながら抱き込むように、該凹状部の底部分が繋がった構成となっていることを特徴とする。
The nut body opening prevention device according to claim 1 has a main body portion that is screwed into an outer surface screw of the bolt body, an opening portion that is inserted from the side with respect to the bolt body, and the bolt body is inserted, A nut body opening prevention device that prevents the proximity of a nut body attached to the bolt body by plastically deforming the main body portion so that a proximity portion provided at the tip of the opening is brought close to the body. And
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes upper and lower concave portions that engage with an upper end portion and a lower end portion of a pair of adjacent portions in a close state, and the concave portion has portions that respectively contact the side surfaces of the upper end portion and the lower end portion. The bottom portion of the concave portion is connected so as to be held while being held .

請求項2記載のナット体開き防止具は、ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成されており、前記貫通孔は、該ナット体開き防止具の脱落を防止すべく前記近接状態の一対の近接部が塑性変形後のキックバックにより戻った該近接部外側間隔より狭い幅に形成されていることを特徴とする。
The nut body opening prevention device according to claim 2 has a main body portion screwed into an outer surface screw of the bolt body, an opening portion to be inserted from the side with respect to the bolt body, and in a state where the bolt body is inserted, A nut body opening prevention device that prevents the proximity of a nut body attached to the bolt body by plastically deforming the main body portion so that a proximity portion provided at the tip of the opening is brought close to the body. And
An engagement portion that engages with the proximity portion to maintain the proximity state in a state where the pair of proximity portions are close to each other, and the engagement portions are an upper end portion and a lower end portion of the pair of proximity portions in the proximity state. The engaging portion is composed of a through hole that connects the concave portions and can be extrapolated from the protruding side of adjacent portions that are close to each other. In order to prevent the nut body opening preventer from falling off, the pair of proximity portions in the proximity state are formed to have a width narrower than the outside interval of the proximity portion returned by kickback after plastic deformation .

請求項3記載のナット体開き防止具は、ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成され、前記係合部は、自身が塑性変形して、前記近接部の両側から係合することを特徴とする。
The nut body opening prevention device according to claim 3 has a main body portion screwed into an outer surface screw of the bolt body, an opening portion to be inserted from the side with respect to the bolt body, and in a state where the bolt body is inserted, A nut body opening prevention device that prevents the proximity of a nut body attached to the bolt body by plastically deforming the main body portion so that a proximity portion provided at the tip of the opening is brought close to the body. And
An engagement portion that engages with the proximity portion to maintain the proximity state in a state where the pair of proximity portions are close to each other, and the engagement portions are an upper end portion and a lower end portion of the pair of proximity portions in the proximity state. The engaging portion is composed of a through hole that connects the concave portions and can be extrapolated from the protruding sides of adjacent portions that are close to each other. Is plastically deformed and is engaged from both sides of the proximity portion.

請求項4記載のナット体開き防止具は、ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成され、前記係合部は、その貫通孔に前記近接状態の近接部を挿嵌させた状態で、自身が前記ナット体の本体部の外周側に塑性変形して、前記近接部の両側から係合することを特徴とする。
The nut body opening prevention device according to claim 4 has a main body portion screwed into an outer surface screw of the bolt body, an opening portion to be inserted from the side with respect to the bolt body, and in a state where the bolt body is inserted, A nut body opening prevention device that prevents the proximity of a nut body attached to the bolt body by plastically deforming the main body portion so that a proximity portion provided at the tip of the opening is brought close to the body. And
An engagement portion that engages with the proximity portion to maintain the proximity state in a state where the pair of proximity portions are close to each other, and the engagement portions are an upper end portion and a lower end portion of the pair of proximity portions in the proximity state. The engaging portion is configured by a through-hole that connects the concave portions and can be extrapolated from the protruding side of the adjacent portions that are close to each other. In a state where the proximity portion in the proximity state is inserted into the through-hole, the plastic body is plastically deformed to the outer peripheral side of the main body portion of the nut body and is engaged from both sides of the proximity portion.

請求項5記載のナット体開き防止具は、ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記取着状態のナット体に取り付けられた状態で、前記近接部の反対側に延設される延出部を備え、該延出部はスパナ等の工具が係合可能な幅を有することを特徴とする。また、前記延出部は、ナット体の上面あるいは下面に配置され、該ナット体と該ナット体によって固定される被固定体との間に介在するように構成されたことを特徴とする。
The nut body opening prevention device according to claim 5 has a main body portion screwed into an outer surface screw of the bolt body, an opening portion to be inserted from the side with respect to the bolt body, and in a state where the bolt body is inserted, A nut body opening prevention device that prevents the proximity of a nut body attached to the bolt body by plastically deforming the main body portion so that a proximity portion provided at the tip of the opening is brought close to the body. And
An engagement portion that engages with the proximity portion to maintain the proximity state in a state where the pair of proximity portions are close to each other, and the engagement portions are an upper end portion and a lower end portion of the pair of proximity portions in the proximity state. A concave portion that engages with the upper and lower portions, and an extension portion that extends to the opposite side of the proximity portion in a state of being attached to the attached nut body, the extension portion being a spanner or the like The tool has a width capable of being engaged. Further, the extending portion is arranged on the upper surface or the lower surface of the nut body, and is configured to be interposed between the nut body and a fixed body fixed by the nut body.

請求項6記載のナット体開き防止具は、請求項5に従属し、前記延出部の先端は、ナット体の本体部の外側に掛かる程度に伸長させたものであることを特徴とする。 The nut body opening preventer according to claim 6 is dependent on claim 5 and is characterized in that the end of the extending portion is extended to the extent that it is applied to the outside of the main body portion of the nut body .

請求項7記載のナット体開き防止具は、請求項5または6に従属し、前記延出部の先端は面取りされていることを特徴とする The nut body opening preventer according to claim 7 is dependent on claim 5 or 6 , characterized in that a tip of the extension portion is chamfered.

請求項8記載のナット体開き防止具は、請求項1〜7のいずれかに従属し、前記ナット体の前記近接部には、前記ボルト体の軸方向に延びた一対の係止凹溝が形成され、前記ナット体開き防止具は、前記凹状部が前記近接状態の近接部の係止凹溝に填まり込むように構成されていることを特徴とする。 The nut body opening preventer according to claim 8 is dependent on any one of claims 1 to 7 , and a pair of locking grooves extending in the axial direction of the bolt body are formed in the proximity portion of the nut body. The nut body opening preventing device is formed, and the concave portion is configured to fit into a locking concave groove of the proximity portion in the proximity state.

請求項9記載のナット体開き防止具は、請求項請求項1、2、5〜8のいずれかに従属し、前記貫通孔を貫通して突出する近接部の突出量と同一高さで同じ方向に突出する突起が備えられていることを特徴とする。 The nut body opening preventer according to claim 9 is dependent on any one of claims 1, 2 , and 5 to 8, and has the same height as the protruding amount of the proximity portion that protrudes through the through hole. Protrusions protruding in the direction are provided.

請求項1記載のナット体開き防止具によれば、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記凹状部は、前記上端部及び下端部の側面にそれぞれ当接する部分を有しながら抱き込むように、該凹状部の底部分が繋がった構成となっているので、近接あるいは当接した状態の近接部を開こうとする力が作用して、どちらか一方が開こうとする時に、その開きを確実に阻止して、ナット体の開きを確実に防止することができるAccording to the nut body opening preventer according to claim 1, the nut body is provided with upper and lower concave portions that engage with the upper end portion and the lower end portion of the pair of proximate proximity portions, and the concave portion includes the upper end portion and the lower end portion. Since the bottom part of the concave part is connected so as to be held while having a part that abuts on each side surface, a force is applied to open the proximity part in the proximity or contact state. When either one is about to open, the opening can be reliably prevented, and the nut body can be reliably prevented from opening .

請求項2記載のナット体開き防止具によれば、係合部の凹状部がナット体の近接部を少なくとも上下両側から拘束するので、確実にナット体の開きを防止することができ、該係合部が前記凹状部を連結した貫通孔で構成されているので、より強固にナット体の近接部の開きを防止することができ、また、前記貫通孔は、前記近接状態の一対の近接部が塑性変形後のキックバックにより戻った該近接部外側間隔より狭い幅に形成されているので、防止具の脱落を防止することができる。 According to the nut body opening preventing device of the second aspect, since the concave portion of the engaging portion restrains the proximity portion of the nut body from at least the upper and lower sides, the nut body can be reliably prevented from being opened. Since the joint portion is composed of a through hole connecting the concave portions, it is possible to more firmly prevent the proximity portion of the nut body from opening, and the through hole is a pair of proximity portions in the proximity state. Is formed to have a width narrower than the outer space of the adjacent portion returned by the kickback after plastic deformation, so that the prevention tool can be prevented from falling off.

請求項3記載のナット体開き防止具によれば、係合部は、自身が塑性変形して、前記近接部の両側から係合するので、同様にナット体の近接部の開きを防止することができる。 According to the nut body opening preventer according to claim 3 , since the engaging portion itself is plastically deformed and engages from both sides of the proximity portion, similarly, the opening of the proximity portion of the nut body is prevented. Can do.

請求項4記載のナット体開き防止具によれば、係合部は、自身が前記ナット体の本体部の外周側に塑性変形して、前記近接部の両側から係合するので、同様にナット体の近接部の開きを防止することができる。 According to the nut body opening preventer according to claim 4 , since the engaging portion itself is plastically deformed to the outer peripheral side of the main body portion of the nut body and engages from both sides of the proximity portion, the nut is similarly formed. Opening of the proximity part of the body can be prevented.

請求項5記載のナット体開き防止具によれば、係合部の凹状部がナット体の近接部を少なくとも上下両側から拘束するので、確実にナット体の開きを防止することができるうえ、スパナ等の工具が係合可能な幅の延出部を備えているので、工具による防止具の操作が可能となる。また、ナット体と被固定体との間に介在する延出部を備えているので、この延出部が被固定体に当接して、ナット体開き防止具付きナット体の締付がスムーズになる。 According to the nut body opening prevention device of claim 5, since the concave portion of the engaging portion restrains the proximity portion of the nut body from at least the upper and lower sides, the nut body can be reliably prevented from being opened , and the spanner Since the extension part of the width which can engage tools, such as, is provided, operation of the prevention tool by a tool is attained. Moreover, since the extension part interposed between the nut body and the fixed body is provided, the extension part abuts on the fixed body, and the nut body with the nut body opening preventer can be tightened smoothly. Become.

請求項6記載のナット体開き防止具によれば、請求項5の効果に加え、前記延出部の先端は、ナット体の本体部の外側に掛かる程度に伸長させたものであるので、該防止部の脱落が防止されるAccording to claim 6 nut opening prevention tool according, in addition to the effect of claim 5, the tip of the extending portion, so is obtained is extended to the extent that applied to the outside of the main body portion of the nut, the The prevention part is prevented from falling off .

請求項7記載のナット体開き防止具によれば、請求項5または6の効果に加え、前記延出部の先端は面取りされているので、延出部が被固定体に当接した場合の引っ掛かりがなく、締付がスムーズになる。 According to claim 7 the nut body opening prevention tool according, in addition to the effects of claim 5 or 6, the tip of the extending portion so are chamfered, when the extending portion is in contact with the fixation member There is no catch and tightening is smooth.

請求項8記載のナット体開き防止具によれば、請求項1〜7いすれかの効果に加え、上記の拘束が、上記凹状部と係止凹溝との嵌合で、より確実に維持され、より確実にナット体の開きを防止することができる。 According to the nut body opening preventer according to claim 8 , in addition to the effect of any one of claims 1 to 7, the restraint is more reliably maintained by the fitting of the concave portion and the locking groove. Thus, the opening of the nut body can be prevented more reliably.

請求項9記載のナット体開き防止具によれば、請求項1、2、5〜8いすれかの効果に加え、突起により、貫通孔をナット体の近接部が限度まで填まり込むようにできる。 According to the nut body opening prevention device of claim 9 , in addition to the effect of any one of claims 1, 2, 5 to 8, so that the proximate portion of the nut body can be inserted to the limit by the protrusion. it can.

以下に、本発明の実施の形態(実施例)について、図面を用いて説明する。 Hereinafter, embodiments (examples) of the present invention will be described with reference to the drawings.

図1は、本発明のナット体開き防止具の一例を示すもので、(a)はその正面図、(b)は平面図、(c)は(a)のBB断面図、(d)は(b)のAA断面図、(e)は(c)のP部詳細図、(f)はその外観斜視図である。 FIG. 1 shows an example of a nut body opening preventer according to the present invention, where (a) is a front view thereof, (b) is a plan view, (c) is a BB cross-sectional view of (a), and (d) is (B) AA sectional drawing, (e) is P section detail drawing of (c), (f) is the external appearance perspective view.

また、図2は、本発明のナット体開き防止具で開き防止されるナット体の一例を示すもので、(a)はその平面図、(b)はその正面図、(c)〜(f)はそのナット体をボルト体に取着する方法の説明図、図3(a)〜(f)は、図1のナット体開き防止具を、図2のナット体と組み合わせて使用する使用方法の一例の説明図である。 FIG. 2 shows an example of a nut body that is prevented from being opened by the nut body opening preventer of the present invention, wherein (a) is a plan view thereof, (b) is a front view thereof, and (c) to (f). ) Is an explanatory view of a method of attaching the nut body to the bolt body, and FIGS. 3A to 3F are usage methods of using the nut body opening preventer of FIG. 1 in combination with the nut body of FIG. It is explanatory drawing of an example.

図1に示すナット体開き防止具5は、長方形形状の鋼板をその長手方向に直交する方向の二つの折り目でそれぞれ直角に折り曲げて、ほぼ、「コ」の字形状としたものであり、その縦面部分の中央に、その「コ」の字の高さ全体に及ぶ貫通孔1が設けられている。 The nut body opening prevention tool 5 shown in FIG. 1 is formed by bending a rectangular steel plate at two right angles at two folds in a direction perpendicular to the longitudinal direction to form a substantially “U” shape. In the center of the vertical surface portion, a through hole 1 that extends over the entire height of the “U” is provided.

この貫通孔1は、ナット体6の一対の近接部6c(図2参照)を近接した状態で挿嵌させ、その近接状態を維持すべく、近接部6cの少なくとも上下両側に係合する係合部1として機能するものである。 The through-hole 1 is engaged with at least the upper and lower sides of the proximity portion 6c so that the pair of proximity portions 6c (see FIG. 2) of the nut body 6 are inserted in close proximity and the proximity state is maintained. It functions as part 1.

また、この貫通孔1は、近接状態の一対の近接部6cの上端部6ca及び下端部6cb(図2(a),(b)参照)に係合する凹状部1fを上下に備え、これらを連結したものともなっている。なお、以下の実施例2、3においても、貫通孔1A、1Bは、それぞれ、この貫通孔1と同様の凹状部を連結したものとして構成されているものである。 Further, the through hole 1 is provided with a concave portion 1f that engages with an upper end portion 6ca and a lower end portion 6cb (see FIGS. 2A and 2B) of a pair of proximity portions 6c in a proximity state, and these are provided. It is also connected. In the following Examples 2 and 3, the through-holes 1A and 1B are each configured by connecting concave portions similar to the through-hole 1.

また、貫通孔1には、ナット体6の近接部6cとの係合状態で、その近接部6cに設けられた係止凹溝6m(図2参照)にちょうど嵌合する係止突起1aが設けられている。 In addition, the through-hole 1 has a locking projection 1a that fits into a locking groove 6m (see FIG. 2) provided in the proximity portion 6c in an engaged state with the proximity portion 6c of the nut body 6. Is provided.

「コ」の字形状の図1(d)における下面と上面はそれぞれ延出部3a、3bと称され、貫通孔1が設けられた面は縦面部3fと称される。 The lower surface and the upper surface of FIG. 1D having a “U” shape are referred to as extending portions 3a and 3b, respectively, and the surface provided with the through hole 1 is referred to as a vertical surface portion 3f.

これらの延出部3a、3bは、後述するように、取着状態のナット体6に取り付けられた状態で、近接部6cの反対側に縦面部3fから延設さたもので、その延出部3a、3bはスパナ等の工具が係合可能な幅となっている。また、延出部3aの方が延出部3bよりより長く延設されている。 As will be described later, these extending portions 3a and 3b are attached to the attached nut body 6 and are extended from the vertical surface portion 3f on the opposite side of the proximity portion 6c. The portions 3a and 3b have such a width that a tool such as a spanner can be engaged. Moreover, the extension part 3a is extended longer than the extension part 3b.

延出部3a、3bには、ボルト体Bをその軸方向に直交する方向から貫通収容すべく、円形と方形の逃がし部3d、3eが設けられている。 The extending portions 3a and 3b are provided with circular and square relief portions 3d and 3e in order to penetrate and accommodate the bolt body B from a direction orthogonal to the axial direction thereof.

縦面部3fから延出部3a、3bへの屈曲外面は、曲面となっており、この曲面をR面取り部3cと称する。このようなR面取り部3cは、長い方の延出部3aの先端をわずかにナット体6側に屈曲させた屈曲外面にも形成されている。 A bent outer surface from the vertical surface portion 3f to the extending portions 3a and 3b is a curved surface, and this curved surface is referred to as an R chamfered portion 3c. Such an R chamfered portion 3c is also formed on the bent outer surface where the tip of the longer extending portion 3a is slightly bent toward the nut body 6 side.

縦面部3fには、その貫通孔(係合部)1の係止突起1aが設けられた上下位置に、この貫通孔1を貫通して突出する近接部6cの突出量と同一高さで同じ方向に突出する突起2が、この貫通孔1を挟むように左右一対で設けられている。 The vertical surface portion 3f has the same height as the protruding amount of the proximity portion 6c protruding through the through hole 1 at the vertical position where the locking projection 1a of the through hole (engaging portion) 1 is provided. A pair of left and right projections 2 are provided so as to sandwich the through hole 1.

このナット体開き防止具5で開き防止されるナット体の一例が、図2(a)、(b)に示すナット体6である。 An example of a nut body that is prevented from being opened by the nut body opening prevention tool 5 is a nut body 6 shown in FIGS.

このナット体6は、鉄鋼材で構成され、取着されるボルト体Bの外面ネジに係合するネジ突条6bをその内面に備えたU字形状の本体部6a、ボルト体Bに対して側方から挿入する開口部6eを備え、ボルト体Bを挿入した状態で、開口部6eの先端に設けられた近接部6cを近接させるべく本体部6a(より、正確には本体部6aの内、近接部6c側の円弧状でない部分)を塑性変形させることにより、ボルト体Bに取着されるものである。 The nut body 6 is made of a steel material, and has a screw protrusion 6b that engages with an outer surface screw of the bolt body B to be attached. An opening 6e inserted from the side is provided, and with the bolt body B inserted, the main body 6a (more precisely, the inside of the main body 6a is arranged to bring the proximity portion 6c provided at the tip of the opening 6e closer. The non-arc-shaped portion on the proximity portion 6c side is plastically deformed to be attached to the bolt body B.

ナット体6をボルト体Bに取着した際にその軸方向の上方となる近接部6cの部分を上端部6ca、下方となる部分を下端部6cbと称する。 When the nut body 6 is attached to the bolt body B, the portion of the proximity portion 6c that is on the upper side in the axial direction is called the upper end portion 6ca, and the portion that is on the lower side is called the lower end portion 6cb.

一対の近接部6cの外側には、ボルト体Bの軸方向に延びた一対の係止凹溝6mが形成されている。上述したように、この係止凹溝6mに、ナット体開き防止具5の係合部(貫通孔)1、より正確には係止突起1aが填まり込むようになっている。 A pair of locking grooves 6m extending in the axial direction of the bolt body B are formed outside the pair of proximity portions 6c. As described above, the engaging recess (through hole) 1 of the nut body opening prevention tool 5, more precisely, the locking protrusion 1a is fitted in the locking groove 6m.

このようなナット体6をボルト体Bに取着するには、まず、図2(c)に示すように、専用工具Tに、ナット体6の本体部6aが手前に、近接部6cの先端が工具Tの先端部の保持部(不図示)に係止保持されるようにナット体6を把持し、ナット体6の開口部6eからボルト体Bが入るようにする。 In order to attach such a nut body 6 to the bolt body B, first, as shown in FIG. 2 (c), the main body portion 6a of the nut body 6 is placed in front of the dedicated tool T, and the tip of the proximity portion 6c. Is held by a holding portion (not shown) at the tip of the tool T, and the bolt body B is inserted through the opening 6e of the nut body 6.

すると、図2(d)に示すように、ナット体6の本体部6aの内周側のネジ突条6bが、ボルト体Bの外面ネジに係合した状態となり、この状態で、専用工具Tを、ナット体6の近接部6cが相互に近接するように締め付けると、ナット体6は塑性変形して、図2(e)の上方のナット体6のような取着状態となる。 Then, as shown in FIG. 2D, the screw protrusion 6b on the inner peripheral side of the main body portion 6a of the nut body 6 is engaged with the outer surface screw of the bolt body B. In this state, the dedicated tool T Are tightened so that the proximity portions 6c of the nut body 6 are close to each other, the nut body 6 is plastically deformed to be in an attached state like the upper nut body 6 in FIG.

一方、このナット体6は、一般に市販されているプライヤと称される一般工具T′によってもボルト体Bに取着でき、図2(e)の下方のナット体6はこの一般工具T′によって取着されている状態である。 On the other hand, the nut body 6 can also be attached to the bolt body B by a general tool T ′ called a commercially available plier, and the lower nut body 6 in FIG. It is in the attached state.

この一般工具T′の場合、この図2(e)に示すように、ナット体6を先にボルト体Bに沿わせておいて、その状態のナット体6の開口部6e側から、その近接部6cの先端を挟むようにしなければならないが、この状態から、一対の近接部6cを相互に近接するように本体部6a側を塑性変形させることで、ナット体6をボルト体Bに取着することができる。 In the case of this general tool T ′, as shown in FIG. 2 (e), the nut body 6 is first placed along the bolt body B, and the proximity of the nut body 6 from the opening 6 e side of the nut body 6 in that state. From this state, the nut body 6 is attached to the bolt body B by plastically deforming the main body 6a side so that the pair of proximity portions 6c are close to each other. can do.

こうして、図2(f)に示すように上下に二個のナット体6がボルト体Bに取着された状態となる。これら二つのナット体6と本発明のナット体開き防止具5とを組み合わせた、ダブルナットによるロックとしての使い方を図3で説明する。 In this way, the two nut bodies 6 are attached to the bolt body B in the vertical direction as shown in FIG. The use as a lock with a double nut in which these two nut bodies 6 and the nut body opening preventer 5 of the present invention are combined will be described with reference to FIG.

まず、図3(a)に示すように、取着状態のナット体6の近接部6cを、ナット体開き防止具5の貫通孔1に嵌め込む。 First, as shown in FIG. 3A, the proximity portion 6 c of the nut body 6 in the attached state is fitted into the through hole 1 of the nut body opening prevention tool 5.

この際、自由状態の近接部6cは塑性変形後のキックバックにより、近接部6c同士間に多少の隙間を生じた状態であり、その状態の近接部6cを貫通孔1に嵌め込むには、多少の力が必要な程度に貫通孔1の間隔が設定されている。 At this time, the proximity portion 6c in the free state is in a state where a slight gap is generated between the proximity portions 6c due to kickback after plastic deformation, and in order to fit the proximity portion 6c in this state into the through hole 1, The space | interval of the through-hole 1 is set to such an extent that some force is required.

したがって、この近接部6cを貫通孔1に完全に入れ込むには、図示するように、ナット体6の本体部6a外周と、ナット体開き防止具5の反ナット体6側とを挟み込んで、一般工具T′で締め込む必要がある。 Therefore, in order to completely insert the proximity portion 6c into the through hole 1, as shown in the drawing, the outer periphery of the main body portion 6a of the nut body 6 and the anti-nut body 6 side of the nut body opening preventer 5 are sandwiched. It is necessary to tighten with a general tool T ′.

この際、ナット体開き防止具5に設けられた突起2は、貫通孔1に近接部6cが完全に嵌め込まれ、近接部6cの先端が貫通孔1から飛び出しても、その飛び出し量と同程度に突起2も飛び出しているので、ナット体開き防止具5を限度までしっかりナット体6に近づくように締め込むことができる。 At this time, the protrusion 2 provided on the nut body opening preventer 5 has the same amount of protrusion even when the proximity portion 6c is completely fitted into the through hole 1 and the tip of the proximity portion 6c protrudes from the through hole 1. Since the protrusion 2 also protrudes, the nut body opening prevention tool 5 can be tightened so as to approach the nut body 6 firmly to the limit.

こうして締め込んだ後には、貫通孔1に設けられた係止突起1aが、ナット体6の近接部6cに設けられた係止凹溝6mに入りこんで、ナット体開き防止具5がナット体6から脱落しない。 After tightening in this way, the locking projection 1 a provided in the through hole 1 enters the locking groove 6 m provided in the proximity portion 6 c of the nut body 6, and the nut body opening prevention tool 5 is attached to the nut body 6. Do not fall off.

この状態は、ナット体6の近接部6cに生じるキックバックに抗した変形に応じた付勢力によって、ナット体6の係止凹溝6mが貫通孔1の係止突起1a方向に付勢されているので、より強固に保持される。 In this state, the engaging concave groove 6m of the nut body 6 is urged in the direction of the engaging protrusion 1a of the through hole 1 by the urging force corresponding to the deformation against the kickback generated in the proximity portion 6c of the nut body 6. Therefore, it is held more firmly.

なお、このような係止凹溝6mがなくとも、近接部6cは、先端側へ行くほど開き加減となっているので、該付勢力により貫通孔1から脱けにくい状態は保持される。また、延出部3aの延設端屈曲部をナット体6の本体部6aの外側に掛かる程度に伸長させて、これによりナット体開き防止具5がナット体6から脱落するのを防止するようにしてもよい。 Even if there is no such locking groove 6m, the proximity portion 6c opens and decreases toward the tip side, so that the state where it is difficult to remove from the through hole 1 is maintained by the biasing force. Further, the extending end bent portion of the extending portion 3a is extended to the extent that it is hung on the outside of the main body portion 6a of the nut body 6, thereby preventing the nut body opening preventer 5 from falling off the nut body 6. It may be.

また、ナット体6は、ナット体開き防止具5の延出部3a、3bの間に挟まれた状態であり、全体として、ナット体開き防止具5の内部に収容された状態となっている。 The nut body 6 is sandwiched between the extension portions 3 a and 3 b of the nut body opening prevention tool 5 and is housed inside the nut body opening prevention tool 5 as a whole. .

こうして、ナット体開き防止具5を一方のナット体6に取り付けることができれば、続いて、図3(b)に示すように、他方のナット体6にも同様に、ナット体開き防止具5を取り付ける。 If the nut body opening prevention device 5 can be attached to one nut body 6 in this way, then the nut body opening prevention device 5 is similarly attached to the other nut body 6 as shown in FIG. Install.

この際、図3(c)に示すように、双方のナット体開き防止具5は、その長い方の延出部3aが向き合うように上下反対方向にナット体6に取り付けられていることに留意されたい。ここで、この上下のナット体開き防止具5付きのナット体6に挟み込んで固定すべき被固定体Sを用意する。 At this time, as shown in FIG. 3 (c), it is noted that both nut body opening prevention tools 5 are attached to the nut body 6 in the opposite direction so that the longer extension portion 3 a faces each other. I want to be. Here, a fixed body S to be fixed by being sandwiched between the nut bodies 6 with the upper and lower nut body opening prevention tools 5 is prepared.

ついで、図3(d)に示すように、被固定体Sをナット体開き防止具5付きのナット体6の間に挟み込み、図3(e)、(f)に示すように、それぞれのナット体開き防止具5付きのナット体6をスパナなどの工具SPで締め込んで行けば、この被固定体Sをボルト体Bの任意の位置で固定することができる。 Next, as shown in FIG. 3 (d), the fixed body S is sandwiched between the nut bodies 6 with the nut body opening preventers 5, and each nut is shown in FIGS. 3 (e) and 3 (f). If the nut body 6 with the body opening prevention tool 5 is tightened with a tool SP such as a spanner, the fixed body S can be fixed at an arbitrary position of the bolt body B.

この際、ナット体6の近接部6cはナット体開き防止具5の貫通孔(係合部)1によりその離間が防止されているので、ナット体開き防止具5を介してナット体6を締め込む際に大きな力を掛けても、この貫通孔1が破損して、近接部6cの近接状態が解除され、ナット体6が脱落したりすることがない。 At this time, since the proximity portion 6 c of the nut body 6 is prevented from being separated by the through hole (engagement portion) 1 of the nut body opening prevention tool 5, the nut body 6 is tightened via the nut body opening prevention tool 5. Even if a large force is applied during insertion, the through hole 1 is not damaged, the proximity state of the proximity portion 6c is released, and the nut body 6 does not fall off.

また、ナット体開き防止具5の延出部3a、3bの幅は、工具SPの規格幅になるようにしてあるので、工具SPでの締め込みが確実に行える。 Further, since the widths of the extending portions 3a and 3b of the nut body opening prevention tool 5 are set to the standard width of the tool SP, the tightening with the tool SP can be performed reliably.

また、ナット体開き防止具5の延出部3a、3bにはR面取り部3cがあるので、延出部3a、3bが被固定体Sに当接するような状態となっても、延出部3a、3bの角部が被固定体Sに引っ掛かったりすることがなく、スムーズに締め込むことができる。 In addition, since the extending portions 3a and 3b of the nut body opening prevention tool 5 have the R chamfered portion 3c, the extending portions 3a and 3b can be extended even when they are in contact with the fixed body S. The corner portions 3a and 3b are not caught on the fixed body S and can be tightened smoothly.

また、このようなR面取り部3cがない場合でも、延出部3a、3bは平面として、被固定体Sに当接するので、スムーズに締め込むことができる。 Further, even when there is no such R chamfered portion 3c, the extending portions 3a and 3b are flat and come into contact with the fixed body S, so that they can be tightened smoothly.

なお、このようなナット体開き防止具5付きのナット体6は、上記と異なり、間に被固定体Sを挟まないで、単にダブルナットとしても、また、単独でもロック用として用いることができ、その場合にも同様の効果を発揮する。 Unlike the above, the nut body 6 with the nut body opening prevention tool 5 can be used simply as a double nut or for locking alone without the object S being sandwiched between them. In that case, the same effect is exhibited.

また、ここでは、上下の凹状部1fを連結した貫通孔1としての係合部1を例示したが、本発明の係合部は、近接部6cの上端部6ca、下端部6cbをそれぞれ挟み込む凹状部1fを上下に備えるものであればよく、連結されている必要はない。 Further, here, the engaging portion 1 as the through hole 1 connecting the upper and lower concave portions 1f is illustrated, but the engaging portion of the present invention is a concave shape that sandwiches the upper end portion 6ca and the lower end portion 6cb of the proximity portion 6c, respectively. What is necessary is just to provide the part 1f up and down, and does not need to be connected.

このような凹状部1fは、それぞれ近接部6cの上端部6ca、下端部6cbの側面部に当接する部分を有しながら、その当接する部分を連結した状態で、これら上端部6ca、下端部6cbを抱き込む構成、換言すれば、凹状部1fの底部分が繋がった構成となっているので、近接あるいは当接した状態の近接部1fを開こうとする力が作用して、どちらか一方が開こうとする時に、その開きを確実に阻止して、ナット体の開きを確実に防止することができる。 Such a concave portion 1f has portions that abut on the side portions of the upper end portion 6ca and the lower end portion 6cb of the proximity portion 6c, respectively. In other words, because the bottom portion of the concave portion 1f is connected, a force is applied to open the proximity portion 1f in the proximity or contact state, and one of them is When trying to open, the opening can be reliably prevented, and the opening of the nut body can be reliably prevented.

図4は、本発明のナット体開き防止具の他例を示すもので、(a)はその正面図、(b)は側面図、(c)は下面図、(d)は外観斜視図、(e)は屈曲部の屈曲前の正面図、(f)は(e)の側面図、図5(a)〜(c)は、図4のナット体開き防止具を、他例のナット体と組み合わせて使用する使用方法の一例の説明図である。 FIG. 4 shows another example of the nut body opening prevention device of the present invention, in which (a) is a front view thereof, (b) is a side view, (c) is a bottom view, and (d) is an external perspective view, (E) is a front view of the bent portion before bending, (f) is a side view of (e), and FIGS. 5 (a) to 5 (c) show the nut body opening prevention device of FIG. It is explanatory drawing of an example of the usage method used in combination.

これより、すでに説明した部分と同じ部分には同じ符号を付して重複説明を省略する。また、煩雑さを避けるために、全ての符号を繰り返して記載しない場合がある。 Accordingly, the same parts as those already described are denoted by the same reference numerals and redundant description is omitted. Moreover, in order to avoid complexity, there are cases where all symbols are not repeated.

このナット体開き防止具5Aも、図1のナット体開き防止具5と同様に、全体としてはナット体を収容するような「コ」の字形状であるが、この「コ」の字の高さ方向に縮むように塑性変形して、ナット体の近接部の離間を防止するようになっている点が異なっている。 The nut body opening prevention tool 5A is also shaped like a “U” so as to accommodate the nut body as a whole, like the nut body opening prevention tool 5 of FIG. The difference is that it is plastically deformed so as to shrink in the vertical direction to prevent separation of the adjacent portion of the nut body.

その構成は、図1のナット体開き防止具5と同様の縦面部3iと、上下同形の延出部3gとを備え、この縦面部3iに形成された貫通孔1Aを特徴とするものである。 The configuration is characterized by a vertical surface portion 3i similar to the nut body opening prevention tool 5 of FIG. 1 and an extending portion 3g having the same upper and lower shape, and a through hole 1A formed in the vertical surface portion 3i. .

ナット体開き防止具5Aは、その縦面部3iの貫通孔1Aを設けた以外の部分の内、両サイドが細幅となり、ここが屈曲されて屈曲部3jとなっているが、この屈曲部3jが屈曲される前の図4(e)、(f)を用いて、この貫通孔1Aの形状について説明する。 The nut body opening preventing tool 5A has a narrow side on both sides of the vertical surface portion 3i other than the through hole 1A, and is bent to form a bent portion 3j. The bent portion 3j The shape of the through hole 1A will be described with reference to FIGS. 4 (e) and 4 (f) before bending.

貫通孔1Aは中央の上下に延びた係合貫通孔1bと、その両側に設けられ、上下に延びた抜き貫通孔1cと、これら平行する三つの貫通孔1b、1cをその直交する方向に連結する横穴1dとから構成されている。係合貫通孔1bと横穴1dとの交差部分の一方側には面取り部1eが設けられている。 1 A of through-holes are engaged through-holes 1b extended up and down in the center, the extraction through-holes 1c extended up and down, and these three parallel through-holes 1b and 1c are connected in the orthogonal direction. It is comprised from the horizontal hole 1d which carries out. A chamfered portion 1e is provided on one side of the intersecting portion between the engagement through hole 1b and the horizontal hole 1d.

係合貫通孔1bの部分に、ナット体の近接部が係合する。 The proximity portion of the nut body engages with the engagement through hole 1b.

縦面部3iにこのような貫通孔1Aを設けると、その両側に細幅部3jが残り、この細幅部3jの長さほぼ中央部分を折り目として屈曲させると、図4(a)、(b)、(c)のようになる。 When such a through-hole 1A is provided in the vertical surface portion 3i, the narrow width portion 3j remains on both sides thereof, and when the length portion of the narrow width portion 3j is bent with a substantially central portion as a crease, FIGS. ) And (c).

延出部3gには、ボルト体Bをその軸方向に直交する方向から貫通収容すべく、円形の逃がし部3hが設けられている。 The extending portion 3g is provided with a circular relief portion 3h so as to penetrate and accommodate the bolt body B from a direction orthogonal to the axial direction thereof.

このような構成のナット体開き防止具5Aをナット体に用いる方法について、図5で説明する。 A method of using the nut body opening prevention tool 5A having such a configuration for the nut body will be described with reference to FIG.

図5に記載されたナット体6Aは、図2のナット体6の本体部6aの外周の、ちょうど開口部6eの反対側となる位置にその反対方向にネジ部が突出するように小ネジ6nを固定したものである。 The nut body 6A shown in FIG. 5 has a small screw 6n so that the threaded portion protrudes in the opposite direction to the outer periphery of the main body portion 6a of the nut body 6 in FIG. Is fixed.

この小ネジ6nは、取着状態のナット体6Aに、更に何らかの被固定体を取り付けるためのものであって、これの有無が、ナット体開き防止具5Aのナット体6Aへの取付に影響を与えるものではない。 The small screw 6n is for attaching a fixed body to the nut body 6A in the attached state, and the presence or absence of this affects the attachment of the nut body opening preventer 5A to the nut body 6A. Not give.

このナット体6Aをボルト体Bに取着する方法は、図2(c)〜(d)で説明した方法と同様である。ただし、この場合、取着工具Tにナット体6Aの本体部6aを手前にした状態では、保持できないので、図2(e)のような形で保持することとなる。 The method of attaching the nut body 6A to the bolt body B is the same as the method described with reference to FIGS. However, in this case, since the main body portion 6a of the nut body 6A is in front of the attachment tool T, it cannot be held, so that it is held in the form as shown in FIG.

この際、専用工具である取着工具Tは、図2(e)のような形でナット体6Aを保持することもできるものである。 At this time, the attachment tool T, which is a dedicated tool, can also hold the nut body 6A in the form as shown in FIG.

さて、図5(a)に示すように、ボルト体Bに取着状態のナット体6Aをナット体開き防止具5Aが抱き込み、その近接部6cに、ナット体開き防止具5Aの貫通孔1Aが嵌まり込むような状態とし、図5(b)に示すように、嵌め込む。 Now, as shown in FIG. 5 (a), the nut body opening prevention tool 5A holds the nut body 6A attached to the bolt body B, and the through hole 1A of the nut body opening prevention tool 5A is inserted in the proximity portion 6c. Is fitted, as shown in FIG. 5B.

この際、貫通孔1Aの係合貫通孔1b部分の横穴1d、面取り部1eとで構成される空間内に、キックバック状態である程度離間した近接部6cが容易に嵌めることができるような構成となっている。 At this time, a configuration in which the proximity portion 6c separated to some extent in the kickback state can be easily fitted in the space formed by the horizontal hole 1d and the chamfered portion 1e of the engagement through-hole 1b portion of the through-hole 1A. It has become.

この状態から、ナット体開き防止具5Aの上下の延出部3gを取着工具T′で挟み込んで押圧すると、屈曲部3jが更に屈曲されて、その屈曲内面が相互に当接するようになり、これに応じて、係合貫通孔1bの面取り部1eにガイドされて、ナット体6Aの近接部6c、特に、その係止凹溝6mが、この係合貫通孔1bと嵌合して挟み込まれるような状態となる。 From this state, when the upper and lower extension portions 3g of the nut body opening prevention tool 5A are sandwiched and pressed by the attachment tool T ′, the bent portion 3j is further bent, and the bent inner surfaces come into contact with each other. Correspondingly, it is guided by the chamfered portion 1e of the engagement through hole 1b, and the proximity portion 6c of the nut body 6A, in particular, the locking groove 6m, is fitted and sandwiched with the engagement through hole 1b. It will be in such a state.

この際、近接部6cは、面取り部1eにガイドされて先にこの面取り部1eを備えた下方の係合貫通孔1bに収容されて位置決めされ、ついで、塑性変形の進行に伴い、上の係合貫通孔1bに収容されるので、確実に係合貫通孔1bに収容されるようになっっている。 At this time, the proximity portion 6c is guided by the chamfered portion 1e and is previously accommodated and positioned in the lower engagement through hole 1b provided with the chamfered portion 1e. Since it is accommodated in the combined through hole 1b, it is surely accommodated in the engaging through hole 1b.

なお、この実施例2の場合には、上記で説明した上下の係合貫通孔1bが、実施例1で説明した凹状部1fに該当する。 In the case of the second embodiment, the upper and lower engagement through holes 1b described above correspond to the concave portion 1f described in the first embodiment.

この状態が、図5(c)に示された状態で、係合貫通孔1bと係止凹溝6mとが嵌合して、近接部6cが相互に当接状態となっている。この当接状態は、係合貫通孔1bと係止凹溝6mとの嵌合状態が、近接部6cのキックバック状態に戻ろうとする付勢力により保持されているので、確実に維持される。 In this state shown in FIG. 5C, the engagement through hole 1b and the locking groove 6m are fitted, and the proximity portion 6c is in contact with each other. This contact state is reliably maintained because the engagement state between the engagement through-hole 1b and the locking groove 6m is maintained by the urging force to return the proximity portion 6c to the kickback state.

したがって、このナット体開き防止具5Aよれば、貫通孔(係合部)1A自身が塑性変形して、近接部6cの両側から係合して、ナット体6Aの開きを防止し、図1のナット体開き防止具5と同様の基本的効果を発揮することができる。 Therefore, according to the nut body opening prevention tool 5A, the through-hole (engagement portion) 1A itself is plastically deformed and engaged from both sides of the proximity portion 6c to prevent the nut body 6A from being opened. The same basic effect as the nut body opening prevention tool 5 can be exhibited.

図6は、本発明のナット体開き防止具の他例を示すもので、(a)はその上面図、(b)は正面図、(c)はその外観斜視図、図7(a)〜(c)は、図6のナット体開き防止具を、他例のナット体と組み合わせて使用する使用方法の一例の説明図である。 FIG. 6 shows another example of the nut body opening prevention device of the present invention, wherein (a) is a top view thereof, (b) is a front view, (c) is an external perspective view thereof, and FIGS. (C) is explanatory drawing of an example of the usage method which uses the nut body opening prevention tool of FIG. 6 in combination with the nut body of another example.

この図6のナット体開き防止具5Bは、図1のナット体開き防止具5とは、その全体形状が「コ」の字ではなく、「く」の字形状である点が異なり、また、図5のナット体開き防止具5Aとは、塑性変形により開き防止効果を発生させる点で共通しているが、その塑性変形の態様が異なっている。 The nut body opening prevention tool 5B in FIG. 6 is different from the nut body opening prevention tool 5 in FIG. 1 in that the overall shape is not a “U” shape but a “U” shape, The nut body opening prevention tool 5A in FIG. 5 is common in that an opening preventing effect is generated by plastic deformation, but the mode of the plastic deformation is different.

このナット体開き防止具5Bは、鉄鋼材の矩形板3kの中央部分に矩形の貫通孔1Bを設け、その後に、この矩形板3kをその長手方向の中央部分の折り目で「く」の字に折り曲げたものである。 This nut body opening prevention tool 5B is provided with a rectangular through-hole 1B in the central portion of a steel plate rectangular plate 3k, and then the rectangular plate 3k is formed into a "<" shape by a fold in the central portion in the longitudinal direction. It is a bent one.

この折り目部分が矩形板3kの辺と交差する部分には、この折り曲げをしやすくするための一対の凹所3mが設けられている。 A pair of recesses 3m for facilitating the folding is provided at a portion where the fold portion intersects the side of the rectangular plate 3k.

貫通孔1Bは、上記折り曲げに伴い、この貫通孔1Bにナット体6Aの近接部6cを嵌め込むための有効開口面積が小さくなるが、図6に示すような「く」の字形状状態で、キックバックによって一定程度離間した近接部6cを容易に嵌め込むことができるようになっている。 As the through-hole 1B is bent, the effective opening area for fitting the proximity portion 6c of the nut body 6A into the through-hole 1B is reduced. However, in the "<" shape as shown in FIG. The proximity portion 6c separated by a certain amount by kickback can be easily fitted.

このような構成のナット体開き防止具5Bをナット体6Aに取り付ける際には、まず、図7(a)に示すように専用工具Tの先端に、防止具5Bの「く」の字の背側が手前に来るように保持する。 When attaching the nut body opening prevention tool 5B having such a configuration to the nut body 6A, first, as shown in FIG. Hold with the side facing you.

ついで、図7(b)に示すように、その保持状態のまで、防止具5Bの貫通孔5Bに取着状態のナット体6Aの近接部6cを嵌め込み、続いて、専用工具Tを締め込んで、防止具5Bの「く」の字の角度がより小さくなるように、つまり、自身がナット体6Aの本体部6aの外周側に塑性変形して、近接部6cの両側から係合するように、防止具5Bを塑性変形させる。 Next, as shown in FIG. 7B, until the holding state, the proximity portion 6c of the nut body 6A in the attached state is fitted into the through hole 5B of the prevention tool 5B, and then the special tool T is tightened. The angle of the "<" of the preventer 5B becomes smaller, i.e., it deforms plastically to the outer peripheral side of the main body portion 6a of the nut body 6A and engages from both sides of the proximity portion 6c. Then, the preventer 5B is plastically deformed.

すると、図7(c)に示すように、貫通孔1Bの有効開口面積が小さくなり、貫通孔1Bの縁部が近接部6cの係止凹溝6mに嵌合して、近接部6c相互間の間隔を狭め、当接するようにさせる。 Then, as shown in FIG.7 (c), the effective opening area of the through-hole 1B becomes small, the edge of the through-hole 1B fits into the latching ditch | groove 6m of the proximity part 6c, and between the proximity parts 6c Narrow the distance between the two so that they abut.

この場合も、近接部6cの当接状態(開き防止状態)は、貫通孔1Bと係止凹溝6mとの嵌合状態が、近接部6cのキックバック状態に戻ろうとする付勢力により保持されているので、確実に維持される。 Also in this case, the contact state (opening prevention state) of the proximity portion 6c is maintained by the urging force that the fitting state of the through hole 1B and the locking groove 6m tries to return to the kickback state of the proximity portion 6c. So it is maintained reliably.

したがって、このナット体開き防止具5Bよれば、図1のナット体開き防止具5、図4のナット体開き防止具5Aと同様の基本的効果を発揮することができる。 Therefore, according to this nut body opening prevention tool 5B, the basic effect similar to the nut body opening prevention tool 5 of FIG. 1 and the nut body opening prevention tool 5A of FIG. 4 can be exhibited.

上記の3つの実施例は、いずれも、特許請求の範囲に記載の本発明の例示にすぎず、本発明はこれらの実施例だけに限定されるものではない。 Each of the above-described three embodiments is merely an example of the present invention described in the claims, and the present invention is not limited to these embodiments.

例えば、ナット体開き防止具5、5A、5Bは例示のいずれのナット体6、6Aにも取付可能である。 For example, the nut body opening preventers 5, 5A, 5B can be attached to any of the illustrated nut bodies 6, 6A.

本発明のナット体開き防止具は、ボルト体の軸側方から取着されたナット体の開きを確実に防止することが要請されるあらゆる産業上の分野に用いることができる。 The nut body opening prevention device of the present invention can be used in any industrial field where it is required to reliably prevent the nut body attached from the axial side of the bolt body from being opened.

本発明のナット体開き防止具の一例を示すもので、(a)はその正面図、(b)は平面図、(c)は(a)のBB断面図、(d)は(b)のAA断面図、(e)は(c)のP部詳細図、(f)はその外観斜視図An example of the nut body opening prevention tool of this invention is shown, (a) is the front view, (b) is a top view, (c) is BB sectional drawing of (a), (d) is (b). AA sectional view, (e) is a detailed view of P part of (c), (f) is an external perspective view thereof. 本発明のナット体開き防止具で開き防止されるナット体の一例を示すもので、(a)はその平面図、(b)はその正面図、(c)〜(f)はそのナット体をボルト体に取着する方法の説明図It shows an example of a nut body that is prevented from being opened by the nut body opening preventer of the present invention, (a) is a plan view thereof, (b) is a front view thereof, and (c) to (f) are those nut bodies. Explanatory drawing of the method of attaching to the bolt body (a)〜(f)は、図1のナット体開き防止具を、図2のナット体と組み合わせて使用する使用方法の一例の説明図(A)-(f) is explanatory drawing of an example of the usage method which uses the nut body opening prevention tool of FIG. 1 in combination with the nut body of FIG. 本発明のナット体開き防止具の他例を示すもので、(a)はその正面図、(b)は側面図、(c)は下面図、(d)は外観斜視図、(e)は屈曲部の屈曲前の正面図、(f)は(e)の側面図The other example of the nut body opening prevention tool of this invention is shown, (a) is the front view, (b) is a side view, (c) is a bottom view, (d) is an external perspective view, (e) is Front view before bending of bent portion, (f) is a side view of (e) (a)〜(c)は、図4のナット体開き防止具を、他例のナット体と組み合わせて使用する使用方法の一例の説明図(A)-(c) is explanatory drawing of an example of the usage method which uses the nut body opening prevention tool of FIG. 4 in combination with the nut body of another example. 本発明のナット体開き防止具の他例を示すもので、(a)はその上面図、(b)は正面図、(c)はその外観斜視図The other example of the nut body opening prevention tool of this invention is shown, (a) is the top view, (b) is a front view, (c) is the external appearance perspective view. (a)〜(c)は、図6のナット体開き防止具を、他例のナット体と組み合わせて使用する使用方法の一例の説明図(A)-(c) is explanatory drawing of an example of the usage method which uses the nut body opening prevention tool of FIG. 6 in combination with the nut body of another example. 従来のナット体開き防止具を例示する図The figure which illustrates the conventional nut body opening prevention tool

1、1A、1B 係合部(貫通孔)
1f 凹状部
2 突起
3a、3b 延出部
5、5A、5B ナット体開き防止具
6、6A ナット体
6a 本体部
6c 近接部
6ca 上端部
6cb 下端部
6e 開口部
6m 係止凹溝
B ボルト体
S 被固定体
T 専用工具
1, 1A, 1B Engagement part (through hole)
1f concave part
2 Protrusions 3a, 3b Extension portions 5, 5A, 5B Nut body opening prevention device 6, 6A Nut body 6a Main body portion 6c Proximity portion 6ca Upper end portion 6cb Lower end portion 6e Opening portion 6m Locking groove B Bolt body S Fixed body Special tool for T

Claims (9)

ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、前記凹状部は、前記上端部及び下端部の側面にそれぞれ当接する部分を有しながら抱き込むように、該凹状部の底部分が繋がった構成となっていることを特徴とするナット体開き防止具
It has a main body part that is screwed onto the outer surface screw of the bolt body, and an opening part that is inserted from the side with respect to the bolt body. When the bolt body is inserted, the proximity part provided at the tip of the opening part A nut body opening preventer that prevents the proximity of the nut body to be attached to the bolt body by plastically deforming the main body portion to allow
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes upper and lower concave portions that engage with an upper end portion and a lower end portion of a pair of adjacent portions in a close state, and the concave portion has portions that respectively contact the side surfaces of the upper end portion and the lower end portion. Nut body opening prevention device, wherein the bottom portion of the concave portion is connected so as to be held while
ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、
前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成され、前記貫通孔は、該ナット体開き防止具の脱落を防止すべく前記近接状態の一対の近接部が塑性変形後のキックバックにより戻った該近接部外側間隔より狭い幅に形成されているナット体開き防止具。
It has a main body part that is screwed onto the outer surface screw of the bolt body, and an opening part that is inserted from the side with respect to the bolt body. When the bolt body is inserted, the proximity part provided at the tip of the opening part A nut body opening preventer that prevents the proximity of the nut body to be attached to the bolt body by plastically deforming the main body portion to allow
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes a concave portion that engages with an upper end portion and a lower end portion of a pair of proximity portions in the proximity state, and
The engaging portion is configured by a through hole that connects the concave portions and can be inserted from the protruding side of adjacent portions adjacent to each other, and the through hole is configured to prevent the nut body opening preventer from dropping off. The nut body opening prevention tool formed in the width | variety narrower than this space | interval outer side space | interval which a pair of proximity | contact part of the proximity | contact state returned by kickback after plastic deformation .
ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、
前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成され、前記係合部は、自身が塑性変形して、前記近接部の両側から係合することを特徴とするナット体開き防止具。
It has a main body part that is screwed onto the outer surface screw of the bolt body, and an opening part that is inserted from the side with respect to the bolt body. When the bolt body is inserted, the proximity part provided at the tip of the opening part A nut body opening preventer that prevents the proximity of the nut body to be attached to the bolt body by plastically deforming the main body portion to allow
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes a concave portion that engages with an upper end portion and a lower end portion of a pair of proximity portions in the proximity state, and
The engaging portion is configured by a through hole that connects the concave portions and can be extrapolated from the protruding side of the adjacent portions adjacent to each other. The nut body opening prevention tool characterized by engaging from.
ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、
前記係合部は、前記凹状部を連結し、互いに近接した近接部の突出側から外挿可能な貫通孔で構成され、前記係合部は、その貫通孔に前記近接状態の近接部を挿嵌させた状態で、自身が前記ナット体の本体部の外周側に塑性変形して、前記近接部の両側から係合することを特徴とするナット体開き防止具。
It has a main body part that is screwed onto the outer surface screw of the bolt body, and an opening part that is inserted from the side with respect to the bolt body. When the bolt body is inserted, the proximity part provided at the tip of the opening part A nut body opening preventer that prevents the proximity of the nut body to be attached to the bolt body by plastically deforming the main body portion to allow
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes a concave portion that engages with an upper end portion and a lower end portion of a pair of proximity portions in the proximity state, and
The engaging portion includes a through hole that connects the concave portions and can be externally inserted from the protruding side of adjacent portions that are close to each other, and the engaging portion inserts the adjacent portion in the proximity state into the through hole. The nut body opening prevention tool characterized by being plastically deformed to the outer peripheral side of the main body portion of the nut body and being engaged from both sides of the proximity portion in the fitted state.
ボルト体の外面ネジに螺合する本体部、該ボルト体に対して側方から挿入する開口部を有し、ボルト体を挿入した状態で、該開口部の先端に設けられた近接部を近接させるべく前記本体部を塑性変形させることにより、前記ボルト体に取着されるナット体の該近接部の離間を防止するナット体開き防止具であって、
前記一対の近接部が近接した状態で、その近接状態を維持すべく前記近接部に係合する係合部を備え、
前記係合部は、近接状態の一対の近接部の上端部及び下端部に係合する凹状部を上下に備え、
前記取着状態のナット体に取り付けられた状態で、前記近接部の反対側に延設される延出部を備え、該延出部はスパナ等の工具が係合可能な幅を有し、前記延出部は、ナット体の上面あるいは下面に配置され、該ナット体と該ナット体によって固定される被固定体との間に介在するように構成されたことを特徴とするナット体開き防止具。
It has a main body part that is screwed onto the outer surface screw of the bolt body, and an opening part that is inserted from the side with respect to the bolt body. When the bolt body is inserted, the proximity part provided at the tip of the opening part A nut body opening preventer that prevents the proximity of the nut body to be attached to the bolt body by plastically deforming the main body portion to allow
In the state where the pair of proximity portions are close to each other, an engagement portion that engages with the proximity portion to maintain the proximity state is provided.
The engaging portion includes a concave portion that engages with an upper end portion and a lower end portion of a pair of proximity portions in the proximity state, and
In an attached state to the nut body in the attached state, the extension portion is provided to extend on the opposite side of the proximity portion, and the extension portion has a width that can be engaged with a tool such as a spanner, The extension portion is disposed on the upper surface or the lower surface of the nut body, and is configured to be interposed between the nut body and a fixed body fixed by the nut body. Ingredients.
前記延出部の先端は、ナット体の本体部の外側に掛かる程度に伸長させたものであることを特徴とする請求項5記載のナット体開き防止具。 6. The nut body opening preventer according to claim 5, wherein a tip end of the extension portion is extended to an extent that it extends to an outside of a main body portion of the nut body. 前記延出部の先端は面取りされていることを特徴とする請求項5または6記載のナット体開き防止具。 The nut body opening prevention tool according to claim 5 or 6, wherein a tip of the extension part is chamfered. 前記ナット体の前記近接部には、前記ボルト体の軸方向に延びた一対の係止凹溝が形成され、前記ナット体開き防止具は、前記凹状部が前記近接状態の近接部の係止凹溝に填まり込むように構成されていることを特徴とする請求項1〜7のいずれか記載のナット体開き防止具。 A pair of locking concave grooves extending in the axial direction of the bolt body are formed in the proximity portion of the nut body, and the nut body opening prevention device is configured to lock the proximity portion in the proximity state. The nut body opening prevention device according to any one of claims 1 to 7 , wherein the nut body opening prevention device is configured to be fitted into a concave groove. 前記貫通孔を貫通して突出する近接部の突出量と同一高さで同じ方向に突出する突起が備えられていることを特徴とする請求項1、2、5〜8のいずれか記載のナット体開き防止具。 9. The nut according to claim 1, further comprising a protrusion protruding in the same direction at the same height as a protruding amount of the adjacent portion protruding through the through hole. Opening prevention tool.
JP2005286990A 2005-09-30 2005-09-30 Nut body opening prevention tool Expired - Fee Related JP4552199B2 (en)

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Publication number Priority date Publication date Assignee Title
WO2003042556A1 (en) * 2001-11-15 2003-05-22 Mirai Kogyo Kabushikikaisha Mounting body for attachment to bolt body and nut body

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WO2003042556A1 (en) * 2001-11-15 2003-05-22 Mirai Kogyo Kabushikikaisha Mounting body for attachment to bolt body and nut body

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