JPH11270540A - Looseness preventing structure for fastening bolt and nut - Google Patents
Looseness preventing structure for fastening bolt and nutInfo
- Publication number
- JPH11270540A JPH11270540A JP9089598A JP9089598A JPH11270540A JP H11270540 A JPH11270540 A JP H11270540A JP 9089598 A JP9089598 A JP 9089598A JP 9089598 A JP9089598 A JP 9089598A JP H11270540 A JPH11270540 A JP H11270540A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- tightening
- cap nut
- head
- bolt
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はボルト・ナットによ
る構造材の締め付け構造に関し、特に、締め付けられた
ボルト・ナットが第三者によって後から緩められるのを
防止する構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for tightening a structural member using bolts and nuts, and more particularly to a structure for preventing a tightened bolt and nut from being loosened later by a third party.
【０００２】[0002]
【背景技術】周知のように、例えば送電線のパイプ鉄塔
等のような構造材においては、多数の締付ボルト・ナッ
トを用いて２つの構造材を締め付け固定するのが普通で
ある。図８は従来のパイプ鉄塔の一部を示し、下部構造
材Ｘ1 及び上部構造材Ｘ2 の対応端部にはフランジＦ
1 ，Ｆ2 がそれぞれ形成され、取付孔Ｙを形成されたこ
れらのフランジＦ1 ，Ｆ2 間が多数の締付ボルト・ナッ
トにより固定される。2. Description of the Related Art As is well known, in a structural material such as a pipe tower of a transmission line, for example, it is common to tighten and fix two structural materials using a number of tightening bolts and nuts. Figure 8 shows a part of a conventional pipe towers, flange F to the corresponding end of the substructure X 1 and an upper structural member X 2
1, F 2 are formed respectively, between the mounting holes Y flanges F 1 of which is formed a, F 2 is fixed by a number of bolts and nuts tightening.
【０００３】つまり、これらの締付ボルト・ナットは取
付孔Ｙに挿入される締付ボルトＢを備え、これらの締付
ボルトＢのねじ部ｂにはトルクレンチ等の締付工具によ
り締付ナットＮが略一定トルクで締め付けられ、これら
の締付ボルト・ナットの締付力により下部構造材Ｘ1 と
上部構造材Ｘ2 とが一体化される。That is, these tightening bolts and nuts are provided with tightening bolts B to be inserted into the mounting holes Y, and the screw portions b of these tightening bolts B are tightened with a tightening nut such as a torque wrench. N is tightened in a substantially constant torque, the substructure X 1 and the upper structural member X 2 are integrated by tightening forces of the bolts and nuts tightening.
【０００４】ところで、このような構造材は、野外に設
置されるので、第三者により締付ボルト・ナットがトル
クレンチ等を用いて緩められる危険があり、このような
締付ボルト・ナットの緩めや除去が行われると、構造材
の倒壊の危険性がある。勿論、このような締付ボルト・
ナットが緩められる危険性は、締付ナットＮの他に、ロ
ックナットを締付ボルトＢのねじ部に付設する場合にも
生じるから、締め付けられた締付ボルト・ナットが後発
的に第三者により緩められる危険性がないことが望まれ
ている。Since such a structural member is installed outdoors, there is a danger that the tightening bolt / nut may be loosened by a third party using a torque wrench or the like. If loosened or removed, there is a risk of collapse of the structural material. Of course, such tightening bolts
The risk of the nut being loosened also occurs when a lock nut is attached to the threaded portion of the tightening bolt B in addition to the tightening nut N. It is desired that there is no risk of being loosened.
【０００５】また、このような締付ボルト・ナットの緩
めによる構造物の倒壊の問題は、チャンネル鋼材等で構
成される大型構造物、例えば大型橋梁、大型クレーンに
おいても、第三者による緩め危害問題として問題視され
つつある。[0005] The problem of collapse of the structure due to the loosening of the tightening bolts and nuts is that even a large structure made of a channel steel material or the like, for example, a large bridge or a large crane, may cause a risk of loosening by a third party. It is being viewed as a problem.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、以上
に述べたような従来の構造材に用いる締付ボルト・ナッ
トの問題に鑑み、締め付け状態におかれたボルト・ナッ
トが後発的に第三者により緩められることのない締付ボ
ルト・ナットの緩め防止構造を得るにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional tightening bolts and nuts used for structural materials, and the bolts and nuts in the tightened state are used later. An object of the present invention is to provide a structure for preventing tightening bolts and nuts from being loosened without being loosened by a third party.
【０００７】[0007]
【課題を解決するための手段】この目的を達成するた
め、本発明は、締付構造材に穿けられた取付孔に挿入さ
れるねじ部をもつ締付ボルト及び同ねじ部にねじ込まれ
るナットで構成される締付ボルト・ナットにおいて、円
筒形の外周面をもちかつ前記ねじ部に対応しためねじを
内部に有する袋ナットで前記ナットを覆い、この袋ナッ
トの底壁部の外部に締付工具を作用できる破断頭部を袋
ナットと一体的に固定しておき、締付工具による一定以
上のトルクの作用により袋ナットから破断頭部を破断さ
せる締付ボルト・ナットの緩め防止構造を提案するもの
である。In order to achieve this object, the present invention is directed to a tightening bolt having a screw portion inserted into a mounting hole formed in a tightening structural member and a nut screwed into the screw portion. In the tightening bolt / nut configured as described above, the nut is covered with a cap nut having a cylindrical outer peripheral surface and having a screw therein for corresponding to the screw portion, and tightened to the outside of a bottom wall portion of the cap nut. We propose a structure to prevent the loosening of the tightening bolts and nuts, in which the breaking head that can work with the tool is fixed integrally with the cap nut, and the breaking head is broken from the cap nut by the action of more than a certain torque by the tightening tool. Is what you do.
【０００８】後述する本発明の好ましい実施例の説明に
おいては、1)前記破断頭部は前記底壁部と同一材料で一
体的に成形される構造、2)前記袋ナットの底壁部には角
穴が形成され、前記破断頭部は、前記角穴に圧入できる
圧入部をもつ形状として袋ナット本体とは別の材料で別
体に成形される構造が説明される。In the following description of a preferred embodiment of the present invention, 1) a structure in which the fractured head is integrally formed of the same material as the bottom wall, 2) a bottom wall of the cap nut A structure is described in which a square hole is formed and the broken head has a press-fit portion that can be pressed into the square hole and is formed separately from a material different from the cap nut body.
【０００９】[0009]
【発明の実施の形態】以下、図１から図７について本発
明の実施例の詳細を説明する。図１から図５は本発明の
第１実施例による締付ボルト・ナットの緩め防止構造を
示し、例えばパイプ鉄塔等のフランジである２つの締付
構造材Ｆ1 ，Ｆ2 には貫通した取付孔１が形成され、こ
の取付孔１に挿入される締付ボルト２とこの締付ボルト
２のねじ部２ａにねじ込まれるナットとにより、両締付
構造材Ｆ1 ，Ｆ2 が互いに固定関係におかれる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIGS. 1 to 5 show a structure for preventing loosening of a tightening bolt / nut according to a first embodiment of the present invention. For example, two tightening structural members F 1 and F 2 which are flanges of a pipe tower or the like penetrate the mounting structure. A hole 1 is formed, and a tightening bolt 2 inserted into the mounting hole 1 and a nut screwed into a screw portion 2a of the tightening bolt 2 secure the two tightening structural members F 1 and F 2 to each other. I will put it.
【００１０】第１実施例の場合、固定される締付構造材
Ｆ1 ，Ｆ2 の間には取付孔１が形成され、同取付孔１に
挿入される締付ボルト２のねじ部２ａに締付ナット３及
びロックナット４がねじ込まれるが、締付ボルト２の頭
部２ｂの回転を抑えた状態として、これらの締付ナット
３及びロックナット４がトルクレンチ等の締付工具で締
め付けられる。また、締付ボルト２のねじ部２ａに対す
る締付ナット３及びロックナット４の締め付け状態にお
いては、同ねじ部２ａの一部がロックナット４の外部に
露呈された状態にある。勿論、第１実施例にあっては、
締付ナット３の後発的な緩みをロックナット４の締め付
けにより防止した構造であるから、ロックナット４自体
の後発的な緩みがない場合は、ロックナット４は省略さ
れる。In the case of the first embodiment, a mounting hole 1 is formed between the fastening structural members F 1 and F 2 to be fixed, and a screw portion 2a of a tightening bolt 2 inserted into the mounting hole 1 is formed. Although the tightening nut 3 and the lock nut 4 are screwed in, the tightening nut 3 and the lock nut 4 are tightened with a tightening tool such as a torque wrench while the rotation of the head 2b of the tightening bolt 2 is suppressed. . Further, when the tightening nut 3 and the lock nut 4 are fastened to the screw portion 2 a of the tightening bolt 2, a part of the screw portion 2 a is exposed to the outside of the lock nut 4. Of course, in the first embodiment,
Since the structure is such that the subsequent loosening of the tightening nut 3 is prevented by tightening the lock nut 4, the lock nut 4 is omitted if there is no subsequent loosening of the lock nut 4 itself.
【００１１】本発明によれば、前記締付ナット３及びロ
ックナット４の外面は外周面を平滑な円筒面とされる袋
ナット５Ａで覆われ、全体をアルミニウム合金等の金属
で製作する同袋ナット５Ａの内部には、前記ねじ部２ａ
に対応されためねじ６Ａが形成される。即ち、詳細を図
２及び図３に示された同袋ナット５Ａは、一端を底壁部
５ａで閉塞された円筒形の周壁部５ｂを有するもので、
この周壁部５ｂの外周面はトルクレンチ等の締付工具を
作用できぬように平滑な円筒面とされる。また、前記袋
ナット５Ａの内部には前記締付ナット３及びロックナッ
ト４を収容できる円筒空間７Ａが形成され、前記底壁部
５ａの中心部には同円筒空間７Ａに連続した前記めねじ
６Ａが形成してある。According to the present invention, the outer surfaces of the tightening nut 3 and the lock nut 4 are covered with a cap nut 5A whose outer peripheral surface is a smooth cylindrical surface, and the entire bag is made of metal such as aluminum alloy. Inside the nut 5A, the screw portion 2a is provided.
Therefore, a screw 6A is formed. That is, the cap nut 5A shown in detail in FIGS. 2 and 3 has a cylindrical peripheral wall 5b one end of which is closed by a bottom wall 5a.
The outer peripheral surface of the peripheral wall portion 5b is a smooth cylindrical surface so that a tightening tool such as a torque wrench cannot act thereon. Further, a cylindrical space 7A capable of accommodating the tightening nut 3 and the lock nut 4 is formed inside the cap nut 5A, and the female screw 6A continuous with the cylindrical space 7A is formed at the center of the bottom wall 5a. Is formed.
【００１２】前記袋ナット５Ａの底壁部５ａの外部には
一定トルクの付与により容易に破断する小径の首部８Ａ
を介して６角形の破断頭部９Ａが一体成形され、この破
断頭部９Ａにトルクレンチ等の締付工具を作用できる。Outside the bottom wall 5a of the cap nut 5A, a small-diameter neck 8A which is easily broken by applying a constant torque.
A hexagonal fractured head 9A is integrally formed through this, and a tightening tool such as a torque wrench can act on the fractured head 9A.
【００１３】第１実施例による締付ボルト・ナットの緩
め防止構造は、以上のような構造であるから、締付ボル
ト２のねじ部２ａに締付ナット３及びロックナット４を
締め付けた後、同締付ナット３及びロックナット４を覆
った状態としてねじ部２ａに袋ナット５Ａをねじ込むだ
けで、後発的に締付ナット３及びロックナット４が緩め
られるのが防止される。まず、図４に示すように、締付
構造材Ｆ1 ，Ｆ2 の取付孔１に締付ボルト２のねじ部２
ａを貫通状態におき、同ねじ部２ａに締付ナット３及び
ロックナット４を締め付けることにより、両締付構造材
Ｆ1 ，Ｆ2 は完全な固定関係におかれる。この後、図５
に示すように、締め付けられた締付ナット３及びロック
ナット４を包囲するように、締付ボルト２のねじ部２ａ
に袋ナット５Ａを被せると、ねじ部２ａの先端に袋ナッ
ト５Ａのめねじ６Ａが対応されるから、同ねじ部２ａに
めねじ６Ａをねじ込み・固定できる。この場合、袋ナッ
ト５Ａの破断頭部９Ａを利用して袋ナット５Ａが締付ボ
ルト２のねじ部２ａに固定されるけれども、この締付工
程では、破断頭部９Ａにトルクレンチ等の締付工具を作
用させるが、袋ナット５Ａの端面が締付構造材Ｆ1 ，Ｆ
2 の表面に当接して袋ナット５Ａが完全に固定される
と、締付工具からの過剰なトルク伝達により首部８Ａが
破断し、破断頭部９Ａが袋ナット５Ａから脱落する。The structure for preventing the loosening of the tightening bolt / nut according to the first embodiment is as described above. Therefore, after tightening the tightening nut 3 and the lock nut 4 on the screw portion 2a of the tightening bolt 2, By simply screwing the cap nut 5A into the screw portion 2a while covering the tightening nut 3 and the lock nut 4, it is possible to prevent the tightening nut 3 and the lock nut 4 from being loosened later. First, as shown in FIG. 4, the screw portion 2 of the fastening bolt 2 into the mounting hole 1 of the fastening structure material F 1, F 2
a, and the tightening nut 3 and the lock nut 4 are tightened to the screw portion 2a, whereby the two tightening structural members F 1 and F 2 are completely fixed. After this, FIG.
As shown in the figure, the screw portion 2a of the tightening bolt 2 is so surrounded as to surround the tightened nut 3 and the lock nut 4.
When the cap nut 5A is put on the threaded portion 2a, the female screw 6A of the cap nut 5A corresponds to the tip of the screw portion 2a. In this case, the cap nut 5A is fixed to the screw portion 2a of the tightening bolt 2 using the break head 9A of the cap nut 5A, but in this tightening step, a torque wrench or the like is tightened to the break head 9A. The tool is actuated, but the end face of the cap nut 5A is fastened to the fastening structural materials F 1 , F
When the cap nut 5A is completely fixed in contact with the surface of 2, the neck portion 8A is broken by excessive torque transmission from the tightening tool, and the broken head 9A falls off the cap nut 5A.
【００１４】よって、締付ナット３及びロックナット４
を完全に覆った状態として、締付ボルト２のねじ部２ａ
に袋ナット５Ａを固定した締め付け状態では、破断頭部
９Ａが脱落された状態になるから、通常の締付工具では
袋ナット５Ａを回転できなくなるので、第三者による締
付ナット３またはロックナット４の後発的な緩めを回避
できる。Therefore, the tightening nut 3 and the lock nut 4
Is completely covered, and the screw portion 2a of the tightening bolt 2 is
In the tightened state in which the cap nut 5A is fixed, the broken head 9A is in a detached state, so that the cap nut 5A cannot be rotated with a normal tightening tool. 4 subsequent loosening can be avoided.
【００１５】図６及び図７は本発明の第２実施例で用い
る袋ナット５Ｂを示し、この実施例の場合、袋ナット５
Ｂは、例えば鋼材等の剛性の高い金属材料で構成される
円筒形の袋ナット本体５Ｃと、破断荷重の小さなアルミ
ニウム合金等で作られかつ前記袋ナット本体５Ｃの外面
の角穴１０に圧入部５ｄを圧入される破断頭５Ｄとから
なる。FIGS. 6 and 7 show a cap nut 5B used in a second embodiment of the present invention. In this embodiment, the cap nut 5B is used.
B is a cylindrical cap nut body 5C made of a highly rigid metal material such as steel, for example, and a press-fit portion made of an aluminum alloy or the like having a small breaking load and inserted into a square hole 10 on the outer surface of the cap nut body 5C. 5d.
【００１６】即ち、平滑な外周面をもつ袋ナット本体５
Ｃは、前述した袋ナット５Ｂと同様に、内部に円筒空間
７Ｂを包囲する周壁部５ｂを有するもので、同周壁部５
ｂに連続した底壁部５ａの中心にはめねじ６Ｂが形成し
てある。また、同底壁部５ａの外部には断面が非円形の
角穴１０が形成され、この角穴１０には破断荷重の小さ
な金属で作る破断頭５Ｄの６角頭部５ｅが圧入される。That is, a cap nut body 5 having a smooth outer peripheral surface
C has a peripheral wall portion 5b surrounding the cylindrical space 7B inside similarly to the above-mentioned cap nut 5B.
A female screw 6B is formed at the center of the bottom wall portion 5a continuous with b. A square hole 10 having a non-circular cross section is formed outside the bottom wall 5a, and a hexagonal head 5e of a broken head 5D made of metal having a small breaking load is press-fitted into the square hole 10.
【００１７】この破断頭５Ｄは、前記角穴１０の断面形
状に対応させた圧入部５ｄ及び締付工具を作用できる６
角頭部５ｅを備え、この６角頭部５ｅと前記圧入部５ｄ
の間は、一定トルクの付与で容易に破断する首部５ｆで
連結されている。The broken head 5D can act as a press-fit portion 5d and a tightening tool corresponding to the cross-sectional shape of the square hole 10.
A hexagonal head 5e, and the hexagonal head 5e and the press-fitting portion 5d.
Are connected by a neck 5f which is easily broken by applying a constant torque.
【００１８】第２実施例による締付ボルト・ナットの緩
め防止構造の袋ナット５Ｂは、以上のような構造である
ので、６角頭部５ｅにトルクレンチ等の締付工具を作用
させることにより、締付ボルト２のねじ部２ａに固定で
きるが、袋ナット５Ｂが完全に締め付けられると、破断
頭５Ｄの圧入部５ｄを残して６角頭部５ｅが脱落するか
ら、締付工具を作用できなくなる。この締め付け状態に
あっては、外部攻撃に対して安全な固い袋ナット本体５
Ｃで締付ナット３及びロックナット４が保護されると共
に、破断特性を与え易い軟質金属で破断頭５Ｄを構成で
きるから、緩め防止機能と”ブレイクアウエイ”機能と
を両立できる。Since the cap nut 5B having the tightening bolt / nut loosening prevention structure according to the second embodiment has the above-described structure, the tightening tool such as a torque wrench acts on the hexagonal head 5e. Can be fixed to the screw portion 2a of the tightening bolt 2, but when the cap nut 5B is completely tightened, the hexagonal head 5e falls off leaving the press-fit portion 5d of the broken head 5D, so that a tightening tool can be operated. Disappears. In this tightened state, a hard cap nut body 5 that is safe against external attacks
Since the tightening nut 3 and the lock nut 4 are protected by C and the breaking head 5D can be made of a soft metal which easily gives a breaking characteristic, both the loosening prevention function and the "breakaway" function can be achieved.
【００１９】[0019]
【発明の効果】以上の説明から明らかなように、本発明
によれば、締付ボルトのねじ部にねじ込まれるナットが
袋ナットで覆われ、この袋ナットの破断頭部が袋ナット
の締め付け時に脱落されるので、締付構造材間を締結す
る締付ボルトとナットとの間が後発的に第三者により緩
められる危険性を回避できる。As is apparent from the above description, according to the present invention, the nut screwed into the screw portion of the tightening bolt is covered with the cap nut, and the broken head of the cap nut is tightened when the cap nut is tightened. Since it is dropped, it is possible to avoid a risk that the space between the fastening bolt and the nut for fastening between the fastening structural members is loosened later by a third party.
【図１】本発明の第１実施例による緩め防止構造の断面
図である。FIG. 1 is a sectional view of a loosening prevention structure according to a first embodiment of the present invention.
【図２】同緩め防止構造に用いる袋ナットの断面図であ
る。FIG. 2 is a sectional view of a cap nut used in the loosening prevention structure.
【図３】同袋ナットの上面図である。FIG. 3 is a top view of the cap nut.
【図４】同緩め防止構造の締結工程の断面図である。FIG. 4 is a sectional view of a fastening step of the loosening prevention structure.
【図５】同緩め防止構造の袋ナット取付工程の断面図で
ある。FIG. 5 is a sectional view of a cap nut mounting step of the loosening prevention structure.
【図６】本発明の第２実施例の緩め防止構造に用いる袋
ナットの断面図である。FIG. 6 is a sectional view of a cap nut used in a loosening prevention structure according to a second embodiment of the present invention.
【図７】同袋ナットの一部破断上面図である。FIG. 7 is a partially cutaway top view of the cap nut.
【図８】従来のパイプ鉄塔の要部の拡大斜視図である。FIG. 8 is an enlarged perspective view of a main part of a conventional pipe tower.
Ｆ1 ，Ｆ2 締付構造材 １ 取付孔 ２ 締付ボルト ２ａ ねじ部 ２ｂ 頭部 ３ 締付ナット ４ ロックナット ５Ａ，５Ｂ 袋ナット ５Ｃ 袋ナット本体 ５Ｄ 破断頭 ５ａ 底壁部 ５ｂ 周壁部 ５ｄ 圧入部 ５ｅ ６角頭部 ５ｆ 首部 ６Ａ，６Ｂ めねじ ７Ａ，７Ｂ 円筒空間 ８Ａ 首部 ９Ａ 破断頭部 １０ 角穴F 1 , F 2 Tightening structural material 1 Mounting hole 2 Tightening bolt 2a Screw 2b Head 3 Tightening nut 4 Lock nut 5A, 5B Cap nut 5C Cap nut body 5D Breaking head 5a Bottom wall 5b Peripheral wall 5d Press-fit Part 5e Hexagonal head 5f Neck 6A, 6B Female thread 7A, 7B Cylindrical space 8A Neck 9A Fracture head 10 Square hole
Claims (3)
れるねじ部をもつ締付ボルト及び同ねじ部にねじ込まれ
るナットで構成される締付ボルト・ナットにおいて、円
筒形の外周面をもちかつ前記ねじ部に対応しためねじを
内部に有する袋ナットで前記ナットを覆い、この袋ナッ
トの底壁部の外部に締付工具を作用できる破断頭部を袋
ナットと一体的に固定しておき、締付工具による一定以
上のトルクの作用により袋ナットから破断頭部を破断さ
せることを特徴とする締付ボルト・ナットの緩め防止構
造。1. A cylindrical outer peripheral surface of a tightening bolt and nut comprising a tightening bolt having a screw portion inserted into a mounting hole formed in a tightening structural member and a nut screwed into the screw portion. The nut is covered with a cap nut having a screw inside in order to correspond to the screw part, and a fracture head capable of operating a tightening tool on the outside of the bottom wall of the cap nut is fixed integrally with the cap nut. In addition, a loosening prevention structure of the tightening bolt and nut characterized in that the breaking head is broken from the cap nut by the action of a predetermined torque or more by the tightening tool.
一体的に成形されることを特徴とする請求項１記載の締
付ボルト・ナットの緩め防止構造。2. The structure for preventing loosening of a tightening bolt and nut according to claim 1, wherein said fractured head is integrally formed of the same material as said bottom wall portion.
れ、前記破断頭部は、前記角穴に圧入できる圧入部をも
つ形状として袋ナット本体とは別の材料で別体に成形さ
れることを特徴とする請求項１記載の締付ボルト・ナッ
トの緩め防止構造。3. A square hole is formed in a bottom wall portion of the cap nut, and the broken head has a shape having a press-fit portion capable of being press-fitted into the square hole, and is formed separately from a material different from the cap nut body. 2. The structure for preventing loosening of a tightening bolt / nut according to claim 1, wherein the structure is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09089598A JP4071350B2 (en) | 1998-03-19 | 1998-03-19 | Structure to prevent loosening of tightening bolts and nuts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09089598A JP4071350B2 (en) | 1998-03-19 | 1998-03-19 | Structure to prevent loosening of tightening bolts and nuts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11270540A true JPH11270540A (en) | 1999-10-05 |
| JP4071350B2 JP4071350B2 (en) | 2008-04-02 |
Family
ID=14011149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09089598A Expired - Lifetime JP4071350B2 (en) | 1998-03-19 | 1998-03-19 | Structure to prevent loosening of tightening bolts and nuts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4071350B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005074149A (en) * | 2003-09-03 | 2005-03-24 | Porien Project Kk | Connector for fluid conduit |
| JP2007327308A (en) * | 2006-06-09 | 2007-12-20 | Shuji Yonezawa | Tightening fixture and fixing method for wooden intersecting structure |
-
1998
- 1998-03-19 JP JP09089598A patent/JP4071350B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005074149A (en) * | 2003-09-03 | 2005-03-24 | Porien Project Kk | Connector for fluid conduit |
| JP2007327308A (en) * | 2006-06-09 | 2007-12-20 | Shuji Yonezawa | Tightening fixture and fixing method for wooden intersecting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4071350B2 (en) | 2008-04-02 |
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