JP5802772B2 - Nut and nut clamp, bolt and bolt clamp - Google Patents

Nut and nut clamp, bolt and bolt clamp Download PDF

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JP5802772B2
JP5802772B2 JP2014012637A JP2014012637A JP5802772B2 JP 5802772 B2 JP5802772 B2 JP 5802772B2 JP 2014012637 A JP2014012637 A JP 2014012637A JP 2014012637 A JP2014012637 A JP 2014012637A JP 5802772 B2 JP5802772 B2 JP 5802772B2
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nut
bolt
engaging
engagement
head
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JP2015140821A (en
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小山 修
修 小山
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Takigen Manufacturing Co Ltd
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Description

本発明は、ナット及びナット締め付け具並びにボルト及びボルト締め付け具に関する。   The present invention relates to a nut and a nut fastener, and a bolt and a bolt fastener.

従来、ナット及びナット締め付け具として特許文献1に記載されたものが知られている。ナットは、ボルトに螺合するねじ孔を有するナット本体と、ナット本体の外周側に軸回り相対回転自在、軸方向相対移動不可能に結合されたリングヘッドとを具備する。ナット本体は、ねじ孔を有する突出筒部と、それの基端に形成された鍔状の基部と、突出筒部の外周との間に内側環状間隙を形成してこれを囲むように基部から一体に立ち上がるリテーナ環部とを具備する。リテーナ環部はボール保持孔を有し、これにボールが保持される。リングヘッドは、リテーナ環の外周との間に外側環状間隙を形成してこれを囲むように設けられる。締め付け具は、ナットの内側環状間隙に嵌合する内側係合筒部と、この内側係合筒部と同心一体でナットの外側環状間隙に嵌合する外側係合筒部と、これらの係合筒部から半径方向に延出するハンドルとを具備する。内側係合筒部および外側係合筒部の内周には、それぞれボールを保持する係合溝が形成される。締め付け具の内側係合筒部および外側係合筒部をそれぞれナットの内側環状間隙、外側環状間隙に嵌合させることによって、係合溝にボールを係合させ、ハンドルを握ってナットを回転操作する。
また、ボルト及びボルト締め付け具として、特許文献2に記載されたものが知られている。ボルトの頭部は、軸線に沿って軸部と反対側へ突出する円柱状の中心突起と、この中心突起の外周との間に内側環状間隙を形成してこれを囲むように中心突起と一体に設けられるリテーナ環と、このリテーナ環の外周との間に外側環状間隙を形成してこれを囲むように設けられ、リテーナ環に対して軸回り相対回転自在で軸方向相対移動不可能なリングヘッドとを具備する。リテーナ環はボール保持孔を有し、これにボールが保持される。締め付け具は、ボルト頭部の外側環状間隙に嵌合可能な挿入筒部と、この挿入筒部の内周との間にボルト頭部のリテーナ環を受け入れ可能な環状受入間隙を形成すると共に、内側にボルト頭部の中心突起を受け入れ可能に挿入筒部と同心一体に設けられる係合筒部と、回転操作用のハンドルとを具備する。挿入筒部の外周及び係合筒部の内周には、ボールに係合する軸線方向の係合溝がそれぞれ形成される。締め付け具の挿入筒部及び係合筒部をそれぞれボルトの内側環状間隙、外側環状間隙に嵌合させることによって、係合溝にボールを係合させ、ハンドルを握ってボルトを回転操作する。
Conventionally, what was indicated in patent documents 1 as a nut and a nut clamp is known. The nut includes a nut main body having a screw hole that is screwed into the bolt, and a ring head that is coupled to the outer peripheral side of the nut main body so as to be relatively rotatable about the axis and not to be relatively movable in the axial direction. The nut body is formed from the base so as to form an inner annular gap between the protruding cylindrical part having a screw hole, a bowl-shaped base formed at the base end thereof, and the outer periphery of the protruding cylindrical part. And a retainer ring portion that rises integrally. The retainer ring has a ball holding hole for holding the ball. The ring head is provided so as to surround and surround an outer annular gap with the outer periphery of the retainer ring. The fastening tool includes an inner engagement tube portion that fits into the inner annular gap of the nut, an outer engagement tube portion that is concentric with the inner engagement tube portion and fits into the outer annular gap of the nut, and an engagement thereof. And a handle extending in a radial direction from the cylindrical portion. Engagement grooves for holding the balls are formed on the inner peripheries of the inner engagement cylinder part and the outer engagement cylinder part, respectively. By engaging the inner engagement cylinder and outer engagement cylinder of the fastener with the inner annular gap and outer annular gap of the nut, respectively, the ball is engaged with the engagement groove, and the nut is rotated by grasping the handle. To do.
Moreover, what was described in patent document 2 is known as a volt | bolt and a bolt fastening tool. The head of the bolt is integrated with the center protrusion so as to surround an inner annular gap between the cylindrical center protrusion protruding along the axis to the opposite side of the shaft and the outer periphery of the center protrusion. An outer annular gap is formed between the retainer ring provided on the outer ring and the outer periphery of the retainer ring so as to surround the ring. The ring is relatively rotatable about the axis with respect to the retainer ring and is not axially movable. And a head. The retainer ring has a ball holding hole in which the ball is held. The tightening tool forms an annular receiving gap that can receive the retainer ring of the bolt head between the insertion tube portion that can be fitted into the outer annular gap of the bolt head and the inner periphery of the insertion tube portion, An engaging cylinder part provided concentrically with the insertion cylinder part so as to be able to receive the central projection of the bolt head on the inner side, and a handle for rotation operation. On the outer periphery of the insertion tube portion and the inner periphery of the engagement tube portion, axial engagement grooves that engage with the balls are formed. By engaging the insertion tube portion and the engagement tube portion of the tightening tool with the inner annular gap and the outer annular gap of the bolt, respectively, the ball is engaged with the engagement groove, and the bolt is rotated by grasping the handle.

特開2013−124701号公報JP 2013-124701 A 特開2012−225421号公報JP 2012-225421 A

上記従来のナット及びナット締め付け具、ボルト及びボルト締め付け具のいずれも、ボールを組み込んだ比較的複雑な構成で、製造コストを引き上げる要因となる。したがって、本発明は、より簡素な構成で、安価に得られるナット及びナット締め付け具とボルト及びボルト締め付け具を提供することを目的としている。   All of the conventional nuts and nut tightening tools, bolts and bolt tightening tools have a relatively complicated configuration in which balls are incorporated, and increase the manufacturing cost. Accordingly, an object of the present invention is to provide a nut and a nut fastening tool, a bolt and a bolt fastening tool which can be obtained at a low cost with a simpler configuration.

以下、添付図面の符号を参照して説明するが、本発明はこれに限定されるものではない。
上記課題を解決するための、本発明のナット1及びナット締め付け具2は、ボルトの軸部に螺合させるナット1と、このナットに係合させてこれを回転操作するための締め付け具2とからなる。このナット1は、ボルトに螺合するねじ孔13を中心部に有し外周に係合部14を有する環状のナット本体11と、このナット本体11の外周との間に環状間隙15を形成してナット本体11を囲み、ナット本体11に対して軸周りに相対回転自在で軸方向相対移動不可能に設けられる空転リング12とを具備する。このナットの締め付け具2は、ナット本体11の外周の係合部14に対して軸方向に相対移動自在で軸周り方向に相対回転不可能に係合する対応係合部23を内周に有し、環状間隙15に嵌合可能な係合筒部21と、この係合筒部21から半径方向に延出するハンドル22とを備える。
上記課題を解決するための、本発明のボルト3及びボルト締め付け具2は、頭部31と軸部32とを有するボルト3と、このボルトの頭部31に係合させてボルト3を回転操作するための締め付け具2とからなる。締め付け具2は、上記ナットの締め付け具と同等のものである。このボルト3の頭部31は、頭部本体33と空転リング34とを具備する。頭部本体33は、軸部32と同心一体で外周に係合部35を有する。空転リング34は、頭部本体33の外周との間に環状間隙36を形成して頭部本体33を囲み頭部本体33に対して軸周り相対回転自在で軸方向相対移動不可能に設けられる。
Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above problems, the nut 1 and the nut tightening tool 2 of the present invention include a nut 1 that is screwed into a shaft portion of a bolt, and a tightening tool 2 that is engaged with the nut and is rotated. Consists of. The nut 1 has an annular gap 15 formed between an annular nut body 11 having a screw hole 13 screwed into a bolt at the center and an engaging portion 14 on the outer periphery, and the outer periphery of the nut body 11. An idling ring 12 that surrounds the nut main body 11 and is provided so as to be rotatable relative to the nut main body 11 around its axis but not to be relatively movable in the axial direction. The nut clamping tool 2 has a corresponding engagement portion 23 on the inner periphery that is relatively movable in the axial direction with respect to the engagement portion 14 on the outer periphery of the nut body 11 and engages in a relatively non-rotatable direction around the shaft. In addition, an engagement cylinder portion 21 that can be fitted into the annular gap 15 and a handle 22 that extends from the engagement cylinder portion 21 in the radial direction are provided.
In order to solve the above-mentioned problems, the bolt 3 and the bolt fastening tool 2 of the present invention are a bolt 3 having a head portion 31 and a shaft portion 32, and the bolt 3 is rotated by being engaged with the head portion 31 of the bolt. It consists of a fastening tool 2 for doing this. The fastening tool 2 is equivalent to the fastening tool for the nut. The head 31 of the bolt 3 includes a head body 33 and an idling ring 34. The head body 33 is concentrically integrated with the shaft portion 32 and has an engaging portion 35 on the outer periphery. The idling ring 34 is provided so as to surround the head body 33 by forming an annular gap 36 between the outer periphery of the head body 33 and to be relatively rotatable around the axis with respect to the head body 33 but not to move in the axial direction. .

本発明のナット及びナット締め付け具、ボルト及びボルト締め付け具は、いずれもより簡素な構成で、安価に得られる。   The nut and the nut fastener, the bolt and the bolt fastener of the present invention can all be obtained at a low cost with a simpler configuration.

本発明に係るナットとナット締め付け具とを係合させた状態の断面図である。It is sectional drawing of the state which engaged the nut which concerns on this invention, and a nut clamp. 図1のナットの断面図である。It is sectional drawing of the nut of FIG. 図1のナットの平面図である。It is a top view of the nut of FIG. 図1のナット締め付け具の断面図である。It is sectional drawing of the nut clamp of FIG. 図1のナット締め付け具の底面図である。It is a bottom view of the nut clamp of FIG. 図1のナットにキャップを装着した状態の断面図である。It is sectional drawing of the state which attached the cap to the nut of FIG. 本発明に係るボルトとボルト締め付け具とを係合させた状態の断面図である。It is sectional drawing of the state which engaged the volt | bolt which concerns on this invention, and a bolt fastening tool. 図7のボルトの断面図である。It is sectional drawing of the volt | bolt of FIG. 図7のボルトの平面図である。It is a top view of the volt | bolt of FIG. 図7のボルトにキャップを装着した状態の断面図である。It is sectional drawing of the state which attached the cap to the volt | bolt of FIG.

図面を参照して本発明の実施の形態を説明する。
図1に、ボルトBの軸部に螺合させるナット1と、このナット1に係合させてこれを回転操作するための締め付け具2とを示す。図1ないし図3において、ナット1は、ナット本体11と空転リング12とを具備する。
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a nut 1 that is screwed into a shaft portion of a bolt B, and a tightening tool 2 that is engaged with the nut 1 and is rotated. 1 to 3, the nut 1 includes a nut body 11 and an idling ring 12.

ナット本体11は、ボルトBに螺合するねじ孔13を中心部に有し、外周に係合部14を有する環状の部材である。係合部14は、横断面円弧状で軸方向に延びる複数の係合溝である。   The nut main body 11 is an annular member having a screw hole 13 screwed into the bolt B at the center and an engagement portion 14 on the outer periphery. The engaging portion 14 is a plurality of engaging grooves extending in the axial direction with an arc shape in cross section.

空転リング12は、ナット本体11の外周との間に環状間隙15を形成してナット本体11を囲み、ナット本体11に対して軸周りに相対回転自在で軸方向相対移動不可能に結合される。すなわち、空転リング12は、図において外周がやや上すぼまりの円筒部16と円筒部16の基端側に形成される内側フランジ部17とを具備し、内側フランジ部17の内周とナット本体11の基部外周との間にリング18を介してナット本体11に結合される。   The idle ring 12 forms an annular gap 15 between the outer periphery of the nut body 11 and surrounds the nut body 11, and is coupled to the nut body 11 so as to be relatively rotatable about an axis and not to be relatively movable in the axial direction. . That is, the idling ring 12 includes a cylindrical portion 16 whose outer periphery is slightly narrowed in the drawing and an inner flange portion 17 formed on the proximal end side of the cylindrical portion 16, and an inner periphery and a nut of the inner flange portion 17. The nut 11 is coupled to the outer periphery of the base of the main body 11 via a ring 18.

図1、図4,5に示すように、上記ナット1の締め付け具2は、係合筒部21と、この係合筒部21から半径方向に延出するハンドル22とを備える。   As shown in FIGS. 1, 4, and 5, the tightening tool 2 of the nut 1 includes an engagement tube portion 21 and a handle 22 that extends from the engagement tube portion 21 in the radial direction.

係合筒部21は、ナット本体11の外周の係合部14に対して軸方向に相対移動自在で軸周り方向に相対回転不可能に係合する対応係合部23である係合溝を内周に有し、ナット本体11の環状間隙15に嵌合可能である。すなわち、係合筒部21は、ハンドル22に接続される大径の基部24と、この基部24に対して内周側及び外周側にそれぞれ段部25,26を介して連続する小径の嵌合筒部27を具備する。嵌合筒部27の内周側に、ナット本体11の係合溝14に対応する横断面形状の軸方向に延びる複数の係合突条23が形成される。係合部14,23は、互いにスプライン嵌合する構造であればよく、本実施形態の構造に限られない。   The engagement tube portion 21 has an engagement groove that is a corresponding engagement portion 23 that is relatively movable in the axial direction with respect to the engagement portion 14 on the outer periphery of the nut body 11 and that is relatively non-rotatable in the direction around the shaft. It has an inner periphery and can be fitted into the annular gap 15 of the nut body 11. That is, the engagement cylinder portion 21 includes a large-diameter base portion 24 connected to the handle 22 and a small-diameter fitting that is continuous with the base portion 24 on the inner peripheral side and the outer peripheral side via step portions 25 and 26, respectively. A cylindrical portion 27 is provided. A plurality of engaging protrusions 23 extending in the axial direction having a cross-sectional shape corresponding to the engaging grooves 14 of the nut body 11 are formed on the inner peripheral side of the fitting cylinder portion 27. The engaging portions 14 and 23 are not limited to the structure of the present embodiment as long as they are spline-fitted to each other.

ナット1を回転操作するときには、ナット1に締め付け工具2を係合させる。締め付け工具2の係合突状23をナット2の係合溝14に合わせて嵌合筒部27を環状間隙15に嵌合させ、ハンドル22を握って回転させる。ナット11をボルトに締め付けた状態において、空転リング12を工具で挟持して回転させても、ナット本体11は、回転しないから、ナット11を緩めることができない。1ナットとその締め付け具2の組み合わせ使用によらなければ、ボルトBに対するナット1の着脱操作を行うことができず、したがって、無権限者によるナットの着脱操作を効果的に防止することができる。   When the nut 1 is rotated, the tightening tool 2 is engaged with the nut 1. The fitting cylindrical portion 27 is fitted into the annular gap 15 by aligning the engaging protrusion 23 of the tightening tool 2 with the engaging groove 14 of the nut 2, and the handle 22 is grasped and rotated. Even when the idling ring 12 is sandwiched with a tool and rotated in a state in which the nut 11 is fastened to the bolt, the nut main body 11 does not rotate, so that the nut 11 cannot be loosened. Without using a combination of one nut and its fastener 2, the nut 1 cannot be attached to and detached from the bolt B, and therefore an unauthorized operation of the nut can be effectively prevented.

図6に示すように、所要箇所にナット1を締め付けた後、必要に応じて、ナット1に防塵用のキャップ41,42が装着される。   As shown in FIG. 6, after tightening the nut 1 at a required location, dust-proof caps 41 and 42 are attached to the nut 1 as necessary.

図7に、頭部31と軸部32とを有するボルト3と、このボルト3の頭部31に係合させてボルト3を回転操作するための締め付け具4を示す。図7ないし図9において、ボルトの頭部31は、頭部本体33と、空転リング34とを具備する。   FIG. 7 shows a bolt 3 having a head portion 31 and a shaft portion 32, and a fastening tool 4 for engaging the head portion 31 of the bolt 3 to rotate the bolt 3. 7 to 9, the bolt head portion 31 includes a head body 33 and an idling ring 34.

頭部本体33は、軸部32と同心一体の円柱状であり、外周に係合部35を有する。係合部35は、横断面円弧状で軸方向に延びる複数の係合溝である。   The head body 33 has a cylindrical shape that is concentric with the shaft portion 32, and has an engagement portion 35 on the outer periphery. The engaging portion 35 is a plurality of engaging grooves that have an arc shape in cross section and extend in the axial direction.

空転リング34は、頭部本体33の外周との間に環状間隙36を形成して頭部本体33を囲み頭部本体33に対して軸周り相対回転自在で軸方向相対移動不可能に設けられる。すなわち、空転リング34は、図において外周がやや上すぼまりの円筒部37と円筒部37の基端側に形成される内側フランジ部38とを具備し、内側フランジ部38の内周とボルト本体33の基部外周との間にリング39を介してボルト本体33に結合される。   The idling ring 34 is provided so as to surround the head body 33 by forming an annular gap 36 between the outer periphery of the head body 33 and to be relatively rotatable around the axis with respect to the head body 33 but not to move in the axial direction. . That is, the idling ring 34 includes a cylindrical portion 37 whose outer periphery is slightly narrowed in the drawing and an inner flange portion 38 formed on the proximal end side of the cylindrical portion 37, and the inner periphery of the inner flange portion 38 and the bolt The bolt 33 is coupled to the bolt body 33 via a ring 39 between the base 33 and the outer periphery of the base 33.

上記ボルト本体3の締め付け具としては、上記ナット1の締め付け具2と同等のものを用いることができる。   As the fastening tool for the bolt body 3, the same fastening tool as the fastening tool 2 for the nut 1 can be used.

ボルト3を回転操作するときには、ボルト3に締め付け工具2を係合させる。締め付け工具2の係合突状23をボルト3の係合溝35に合わせて嵌合筒部21を環状間隙36に嵌合させ、ハンドル22を握って回転させる。ボルト3を締め付けた状態において、空転リング34を工具で挟持して回転させても、ボルト3は、回転しないから、ボルト3を緩めることができない。ボルト3とその締め付け具2の組み合わせ使用によらなければ、ボルト3の着脱操作を行うことができず、したがって、無権限者によるボルトの着脱操作を効果的に防止することができる。   When the bolt 3 is rotated, the tightening tool 2 is engaged with the bolt 3. The engagement protrusion 23 of the tightening tool 2 is aligned with the engagement groove 35 of the bolt 3 so that the fitting cylinder portion 21 is fitted into the annular gap 36 and the handle 22 is grasped and rotated. Even when the idling ring 34 is sandwiched with a tool and rotated in a state in which the bolt 3 is tightened, the bolt 3 cannot be loosened because the bolt 3 does not rotate. If the combination of the bolt 3 and the fastening tool 2 is not used, the bolt 3 cannot be attached / detached, and therefore, an unauthorized person can effectively prevent the bolt from being attached / detached.

図10に示すように、所要箇所にボルト3を締め付けた後、必要に応じて、ボルト3に防塵用のキャップ43が装着される。   As shown in FIG. 10, after tightening the bolt 3 at a required location, a dust-proof cap 43 is attached to the bolt 3 as necessary.

1 ナット
2 ナット締め付け具
3 ボルト
11 ナット本体
12 空転リング
13 ねじ孔
14 係合部(係合溝)
15 環状間隙
16 円筒部
17 内側フランジ部
18 リング
21 係合筒部
22 ハンドル
23 対応係合部(係合突条)
24 大径部
25 段部
26 段部
27 小径部
31 ボルトの頭部
32 軸部
33 頭部本体
34 空転リング
35 係合部(係合溝)
36 環状間隙
37 キャップ
38 内側フランジ部
39 リング
41 キャップ
42 キャップ
43 キャップ
B ボルト
DESCRIPTION OF SYMBOLS 1 Nut 2 Nut clamp 3 Bolt 11 Nut main body 12 Idling ring 13 Screw hole 14 Engagement part (engagement groove)
15 annular gap 16 cylindrical part 17 inner flange part 18 ring 21 engaging cylinder part 22 handle 23 corresponding engaging part (engaging protrusion)
24 Large diameter portion 25 Step portion 26 Step portion 27 Small diameter portion 31 Bolt head portion 32 Shaft portion 33 Head portion main body 34 Idling ring 35 Engagement portion (engagement groove)
36 Annular gap 37 Cap 38 Inner flange 39 Ring 41 Cap 42 Cap 43 Cap B Bolt

Claims (4)

ボルトの軸部に螺合させるナットと、このナットに係合させてこれを回転操作するための締め付け具とを具備し、
前記ナットは、ボルトに螺合するねじ孔を中心部に有し外周に係合部を有する環状のナット本体と、このナット本体の外周との間に環状間隙を形成してナット本体を囲み、ナット本体に対して軸周りに相対回転自在で軸方向相対移動不可能に設けられる空転リングとを具備し、
前記締め付け具は、前記ナット本体の外周の係合部に対して軸方向に相対移動自在で軸周り方向に相対回転不可能に係合する対応係合部を内周に有し前記環状間隙に嵌合可能な係合筒部と、この係合筒部から半径方向に延出するハンドルとを備え
前記ナットの係合部又は前記締め付け具の対応係合部の一方は、断面円弧状の軸方向の複数の係合溝であり、他方は係合突条であることを特徴とする、ナット及びナット締め付け具。
A nut that is screwed onto the shaft of the bolt, and a tightening tool that is engaged with the nut and rotated.
The nut surrounds the nut body by forming an annular gap between an annular nut body having a screw hole that engages with a bolt at the center and an engaging portion on the outer periphery, and the outer periphery of the nut body, An idling ring provided so as to be relatively rotatable around the axis with respect to the nut body and not to be relatively movable in the axial direction,
The tightening tool has a corresponding engagement portion on the inner periphery that engages with an engagement portion on the outer periphery of the nut body so as to be relatively movable in the axial direction but not rotatable in the axial direction. An engaging tube portion that can be fitted, and a handle that extends radially from the engaging tube portion ;
One of the corresponding engaging portion of the engaging portion or the clamp of the nut is a plurality of engaging grooves of arcuate cross section in the axial direction, the other is characterized by engagement protrusion der Rukoto, nut And nut clamps.
前記ナットに着脱自在に嵌合する弾性合成樹脂製のキャップをさらに具備することを特徴とする、請求項1に記載のナット及びナット締め付け具。  The nut and the nut fastening tool according to claim 1, further comprising a cap made of an elastic synthetic resin that is detachably fitted to the nut. 頭部と軸部とを有するボルトと、このボルトの頭部に係合させてボルトを回転操作するための締め付け具とを具備し、
前記ボルトの頭部は、軸部と同心一体で外周に係合部を有する頭部本体と、この頭部本体の外周との間に環状間隙を形成して頭部本体を囲み頭部本体に対して軸周り相対回転自在で軸方向相対移動不可能に設けられる空転リングとを具備し、
前記締め付け具は、前記頭部本体の外周の係合部に対して軸方向に相対移動自在で軸周り方向に相対回転不可能に係合する対応係合部を内周に有し、前記環状間隙に嵌合可能な係合筒部と、この係合筒部から半径方向に延出するハンドルとを備え
前記ボルトの係合部又は前記締め付け具の対応係合部の一方は、断面円弧状の軸方向の複数の係合溝であり、他方は係合突条であることを特徴とする、ボルト及びボルト締め付け具。
A bolt having a head and a shaft, and a fastening tool for rotating the bolt by engaging with the head of the bolt;
The head portion of the bolt is concentrically integrated with the shaft portion and has an engaging portion on the outer periphery, and an annular gap is formed between the outer periphery of the head main body so as to surround the head main body. And an idle ring provided so as to be relatively rotatable around the axis and not capable of relative movement in the axial direction,
The fastening tool has a corresponding engagement portion on the inner periphery that is relatively movable in the axial direction with respect to the engagement portion on the outer periphery of the head body, and engages in a non-rotatable manner in the direction around the axis. An engagement tube portion that can be fitted into the gap, and a handle that extends radially from the engagement tube portion ;
One of the corresponding engaging portion of the engaging portion or the fastener of the bolt is a plurality of engaging grooves of arcuate cross section in the axial direction, the other is characterized by engagement protrusion der Rukoto, bolts And bolt fasteners.
前記ボルト頭部に着脱自在に嵌合する弾性合成樹脂製のキャップをさらに具備することを特徴とする、請求項3に記載のボルト及びボルト締め付け具。   The bolt and bolt fastening tool according to claim 3, further comprising an elastic synthetic resin cap that is detachably fitted to the bolt head.
JP2014012637A 2014-01-27 2014-01-27 Nut and nut clamp, bolt and bolt clamp Expired - Fee Related JP5802772B2 (en)

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JP2000009125A (en) * 1998-04-22 2000-01-11 Asahi Metal Ind Ltd Protective cap for bolt and nut
JP2003156027A (en) * 2001-11-19 2003-05-30 Wise Gear:Kk Tightening device
JP2004100938A (en) * 2002-09-10 2004-04-02 Shuhei Iwata Member fastening and fixing with circular bolt
JP5255688B2 (en) * 2011-12-14 2013-08-07 タキゲン製造株式会社 Nut and nut clamp

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