JP2002242917A - Corrosion resistance fitting of bolt - Google Patents
Corrosion resistance fitting of boltInfo
- Publication number
- JP2002242917A JP2002242917A JP2001042479A JP2001042479A JP2002242917A JP 2002242917 A JP2002242917 A JP 2002242917A JP 2001042479 A JP2001042479 A JP 2001042479A JP 2001042479 A JP2001042479 A JP 2001042479A JP 2002242917 A JP2002242917 A JP 2002242917A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- anticorrosion
- fitting
- female screw
- corrosion
- 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.)
- Pending
Links
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気防食法のうち
流電陽極方式を利用してボルトの防食を行うための防食
用金具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion metal fitting for performing anticorrosion of a bolt by using a galvanic anode method out of cathodic protection methods.
【０００２】[0002]
【従来の技術】従来、埋設されている水道管やガス管な
どの流体管の接合に使用されているボルトやナットを腐
食から守る技術として、ボルトやナットの防食対象材に
対してイオン化傾向の大きな低電位の金属材（亜鉛合
金、マグネシウム合金、アルミニウム合金等）からなる
犠牲陽極部材を防食対象材に接続して、この犠牲陽極部
材を優先的に腐食させ、防食対象材の腐食を防ぐことが
周知であり、ボルトにねじ込む犠牲陽極部材に関して
は、たとえば実開昭５８−１２２７２号公報で開示され
ているものがある。2. Description of the Related Art Conventionally, as a technique for protecting bolts and nuts used for joining buried water pipes and gas pipes such as fluid pipes from corrosion, there is a tendency of ionization of bolts and nuts to be protected against corrosion. By connecting a sacrificial anode member made of a large low-potential metal material (zinc alloy, magnesium alloy, aluminum alloy, etc.) to the anticorrosion target material, preferentially corroding the sacrificial anode member to prevent corrosion of the anticorrosion target material The sacrificial anode member screwed into the bolt is disclosed in, for example, Japanese Utility Model Laid-Open No. 58-12272.
【０００３】この従来の犠牲陽極部材である防食用金具
は、アルミニウム材からなる構造体をステンレス製ボル
ト・ナットで接合するものにおいて、上記アルミニウム
材とステンレス間で生じる電気化学的腐蝕よりも早く電
気化学的腐蝕を生じるＺｎ、またはＭｇ等の犠牲陽極金
属からなるナットを上記ステンレス製ナットにダブルナ
ット状に締着したものである。[0003] In this conventional anticorrosion fitting, which is a sacrificial anode member, when a structure made of aluminum is joined with stainless steel bolts and nuts, the electric corrosion is faster than the electrochemical corrosion that occurs between the aluminum and stainless steel. A nut made of a sacrificial anode metal such as Zn or Mg that causes chemical corrosion is fastened to the stainless steel nut in a double nut shape.
【０００４】[0004]
【発明が解決しようとする課題】前記のような防食用金
具をエポキシ樹脂等の電気絶縁性の塗料が全面に塗布さ
れている一般の鋳鉄製等のボルトに取り付けた場合、防
食用金具には、ボルトのねじ部に螺合可能なねじ部が刻
設されているので、互いのねじ山のピッチや有効径がほ
ぼ同じであり、防食用金具はスムーズにねじ込まれて、
塗装を剥離することができないので、陽極となる防食用
金具とボルトの金属面とが上記塗料の介在のために電気
的導通状態とならない。従って、電気絶縁性の塗料が塗
布されているボルトに、防食用金具を取り付けても、防
食効果をあげることができなかった。When the above-mentioned anticorrosion metal fitting is attached to a general cast iron bolt or the like coated with an electrically insulating paint such as epoxy resin on the entire surface, the anticorrosion metal fitting is not provided. Since the screw part that can be screwed into the screw part of the bolt is engraved, the pitch and effective diameter of each other's thread are almost the same, the anticorrosion bracket is screwed smoothly,
Since the paint cannot be peeled off, the anticorrosion metal fittings serving as the anode and the metal surface of the bolt do not become electrically conductive due to the presence of the paint. Therefore, even if an anticorrosion fitting is attached to a bolt coated with an electrically insulating paint, the anticorrosion effect cannot be improved.
【０００５】本発明が解決しよう課題は、上記問題を解
決するためになされたもので、ボルトに対して容易に電
気的導通ができる防食用金具を提供する点にある。An object of the present invention is to solve the above-mentioned problems and to provide an anticorrosion metal fitting which can be easily electrically connected to a bolt.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明の防食用金具は、防食対象のボルトよりイオ
ン化傾向の大きな低電位の金属からなり、前記ボルトね
じ部に螺合可能なめねじが刻設されたナットであって、
前記めねじには、ボルトねじ部の表面切削手段が設けら
れていることを特徴としている。この特徴により、防食
用金具がボルトにねじ込まれると、めねじに設けられた
表面切削手段によりボルトねじ部の表面が削られ、すな
わちボルトねじ部の塗料や酸化皮膜が削りとられ、防食
用金具とボルトとが直接接触して電気的導通状態とな
る。したがって、防食金具を取り付けたボルトが電解質
媒体（海水、地下水、土壌等）中にあると、鉄やダクタ
イル鋳鉄等のボルトよりイオン化傾向の大きな低電位の
金属からなる防食用金具が陽極となってその犠牲作用に
より防食電流が流れてボルトの腐蝕が防止される。In order to solve the above-mentioned problems, the anticorrosion metal fitting of the present invention is made of a low-potential metal having a higher ionization tendency than the anticorrosion target bolt, and can be screwed to the bolt screw portion. A nut engraved with a screw,
The female screw is provided with a means for cutting the surface of the bolt screw portion. With this feature, when the anticorrosion fitting is screwed into the bolt, the surface of the bolt screw portion is shaved by surface cutting means provided on the female screw, that is, the paint or oxide film of the bolt screw portion is scraped off, and the anticorrosion fitting is removed. And the bolts are in direct contact with each other to be in an electrically conductive state. Therefore, when the bolt with the anticorrosion fitting is in the electrolyte medium (seawater, groundwater, soil, etc.), the anticorrosion fitting made of a low-potential metal having a higher ionization tendency than the bolt of iron or ductile cast iron becomes the anode. Due to the sacrificial action, an anticorrosion current flows to prevent corrosion of the bolt.
【０００７】前記表面切削手段が、奥に行くに従いねじ
径が縮小するテーパめねじであるのが好ましい。このよ
うにすると、防食用金具内のめねじの谷の径や内径がボ
ルトねじ部の外径や谷の径より小径に形成されているの
で、防食用金具をねじ込むと、防食用金具のねじ山とボ
ルトのねじ山とが当接して、ボルトねじ部の先端側より
徐々に表面を切削しながらねじ込まれて、電気的導通状
態で取り付けることができるので、ボルトを確実に防食
することができる。[0007] It is preferable that the surface cutting means is a tapered female thread whose thread diameter decreases as it goes deeper. In this case, since the diameter and the inner diameter of the female thread in the anticorrosion metal fitting are formed to be smaller than the outer diameter and the diameter of the valley of the bolt screw portion, when the anticorrosion metal fitting is screwed in, the screw of the anticorrosion metal fitting is screwed. The bolt and the screw thread of the bolt come into contact and are screwed in while cutting the surface gradually from the tip side of the bolt screw part, and can be mounted in an electrically conductive state, so that the bolt can be reliably protected from corrosion. .
【０００８】前記表面切削手段が、ボルトねじ部におけ
るねじ山のピッチと異なるピッチに形成されているめね
じであるのが好ましい。このようにすると、防食用金具
をねじ込んでいくと、ピッチが異なるのでボルトのねじ
山が係合しボルトねじ部の表面を切削しながらねじ込ま
れて、電気的導通状態で取り付けることができるので、
ボルトを確実に防食することができる。[0008] It is preferable that the surface cutting means is a female screw formed at a pitch different from the pitch of the thread in the bolt screw portion. In this way, when the anticorrosion fitting is screwed in, the pitch is different, so the thread of the bolt is engaged, the screw is screwed in while cutting the surface of the bolt screw portion, and it can be mounted in an electrically conductive state,
Bolts can be reliably protected.
【０００９】前記めねじの奥が閉塞されて袋ナット状に
形成されるとともに、切削クズを収納する収容部が形成
されているのが好ましい。このようにすると、防食用金
具の質量を大きくすることができるので、犠牲陽極の質
量が大きくなって長期間にわたってボルトの防食を行え
る。また、収容部に切削クズを収容することができるの
で、切削クズの行き場がなくなることがなく、ボルトと
ナットとの間に介在することがないので確実に電気的導
通状態で取り付けることができる。It is preferable that the inside of the female screw is closed to form a cap nut shape, and that a receiving portion for storing cutting waste is formed. By doing so, the weight of the anticorrosion metal fitting can be increased, so that the weight of the sacrificial anode is increased and the corrosion of the bolt can be prevented for a long period of time. Further, since the cutting waste can be accommodated in the housing portion, there is no place where the cutting waste goes, and there is no intervening between the bolt and the nut, so that the mounting can be reliably performed in an electrically conductive state.
【００１０】前記ナットに、防食対象のボルトよりイオ
ン化傾向の大きな低電位の金属からなる増設陽極体が電
気的導通状態で取り付けられているのが好ましい。この
ようにすると、犠牲陽極体の質量が増し長期間の防食が
可能となる。[0010] It is preferable that an additional anode body made of a low-potential metal having a higher ionization tendency than the bolt to be protected is attached to the nut in an electrically conductive state. By doing so, the mass of the sacrificial anode body increases, and long-term corrosion prevention becomes possible.
【００１１】前記めねじの奥側に取付めねじ部が刻設さ
れ、増設陽極体が螺入して取り付けられているが好まし
い。このようにすると、増設陽極体をねじ込むだけで取
り付けることができるので、増設陽極体の質量を調節す
ることにより、防錆期間の制御を容易に行える。また、
増設陽極体をねじ込んで取り付けるので防食用金具をさ
らに締め付けることができ、防食用金具の取り付けが確
実になる。[0011] It is preferable that a female screw portion is provided at the inner side of the female screw, and an additional anode body is screwed into the female screw portion. In this case, since the additional anode body can be attached only by screwing, the rust prevention period can be easily controlled by adjusting the mass of the additional anode body. Also,
Since the additional anode body is screwed in and attached, the anticorrosion fitting can be further tightened, and the attachment of the anticorrosion fitting is ensured.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１ないし図２は、本発明の第１実施例を
示すもので、１は本発明の防食用金具、２は防食金具の
本体、３は本体２に刻設されためねじ、８は防食対象部
材のボルト、１０はボルト８にねじ込まれて取り付けら
れるのナットを示している。FIGS. 1 and 2 show a first embodiment of the present invention. Reference numeral 1 denotes an anticorrosion metal fitting of the present invention, 2 denotes a main body of the anticorrosion metal fitting, 3 denotes a screw cut into the main body 2, 8 Denotes a bolt of the anticorrosion target member, and 10 denotes a nut which is screwed into and attached to the bolt 8.
【００１４】本体２は、亜鉛合金、マグネシウム合金、
アルミニウム合金等の、ボルト８よりイオン化傾向の大
きな低電位の合金で製作され、平面視ほぼ正六角形をな
して、ボルト８のボルトねじ部９に螺入可能なめねじ３
が刻設されている。めねじ３が開放された面に対して反
対側は閉塞されて外方向に凸状のドーム部２ａが設けら
れている袋ナット状になっており、六角形の大きさはナ
ット１０と同じ面幅に形成されている。The main body 2 is made of a zinc alloy, a magnesium alloy,
A female screw 3 made of a low-potential alloy, such as an aluminum alloy, having a higher ionization tendency than the bolt 8 and having a substantially hexagonal shape in plan view and capable of being screwed into the bolt screw portion 9 of the bolt 8.
Is engraved. The opposite side to the surface where the female screw 3 is opened is closed and has a cap nut shape provided with a dome portion 2a which is outwardly convex, and the hexagonal size is the same as that of the nut 10. It is formed in width.
【００１５】めねじ３は、奥に行くに従い径が小さくな
るテーパめねじとして形成されている。めねじ３の奥に
は、めねじ３がボルトねじ部９を切削したくずを収納す
る空間である収納部４が形成されている。The internal thread 3 is formed as a tapered internal thread whose diameter decreases as it goes deeper. In the back of the female screw 3, a storage portion 4 is formed, which is a space for storing the debris obtained by cutting the bolt screw portion 9 by the female screw 3.
【００１６】このような構成からなるボルトの防食用金
具１は、たとえば図２に示すように埋設された流体管の
フランジ１１、１１の接合に使用されるボルト８の腐食
防止用に使用される。パッキン１２を介して当接された
フランジ１１、１１のボルト孔に貫通したボルト８にナ
ット１０を螺合してフランジ１１、１１同士を接合し、
接合が完了したボルト８のボルトねじ部９の先端に防食
用金具１をねじ込んで取り付けられている。The anticorrosion metal fitting 1 for a bolt having such a configuration is used for preventing corrosion of a bolt 8 used for joining flanges 11 of a fluid pipe buried as shown in FIG. 2, for example. . A nut 10 is screwed into a bolt 8 penetrating through bolt holes of the flanges 11, 11 abutted via a packing 12 to join the flanges 11, 11 together.
The anticorrosion fitting 1 is screwed and attached to the tip of the bolt screw portion 9 of the bolt 8 which has been joined.
【００１７】この場合、防食用金具１の締め付けは、ナ
ット１０を締め付けた工具（スパナ等）を使用して締め
付けることができ、本体２のめねじ３がテーパめねじに
形成されているので、ボルト８のボルトねじ部９の表面
を削りながら取り付けられ、切削カスが収容部４に収容
される。In this case, the anticorrosion fitting 1 can be tightened by using a tool (spanner or the like) for tightening the nut 10, and the female screw 3 of the main body 2 is formed as a tapered female screw. The bolt 8 is attached while shaving the surface of the bolt thread portion 9, and the cutting waste is accommodated in the accommodation portion 4.
【００１８】そして、ボルトねじ部９の表面が削り取ら
れるので、ボルト８の金属面と防食用金具１とが直接接
触して、両者は電気的導通状態となる。このようなボル
ト８を埋設している土壌自体が電解質である。従って、
ボルト８よりイオン化傾向の大きな低電位の合金の防食
用金具１とボルト８間には電位差が発生し、それに伴い
電位差発生の陽極側である防食用金具１を構成する合金
がイオンとなって土壌中に流出してこの防食用金具１の
みが腐食し、よって陰極側となるボルト８の腐食は防止
される。Then, since the surface of the bolt screw portion 9 is scraped off, the metal surface of the bolt 8 and the anticorrosion fitting 1 come into direct contact, and both are brought into an electrically conductive state. The soil itself in which such bolts 8 are buried is the electrolyte. Therefore,
A potential difference is generated between the anti-corrosion metal fitting 1 made of a low-potential alloy having a greater tendency to ionize than the bolt 8 and the bolt 8, and the alloy constituting the anti-corrosion metal fitting 1, which is on the anode side of the potential difference generation, becomes an ion and becomes soil. The anticorrosion metal fitting 1 leaks into the inside and corrodes only the anticorrosion fitting 1, thereby preventing the corrosion of the bolt 8 on the cathode side.
【００１９】図３ないし図５は、本発明の第２実施例を
示すもので、本体２の外部に増設陽極体６が取り付けら
れているものである。FIGS. 3 to 5 show a second embodiment of the present invention, in which an additional anode body 6 is attached to the outside of the main body 2. FIG.
【００２０】本体２は、第１実施例とほぼ同じに形成さ
れているが閉塞部の外側にはドーム部２ａがなく、平坦
に形成され、閉塞部のほぼ中央には増設陽極体６がねじ
込まれる取付めねじ部５が刻設されている。めねじ３は
そのピッチが、ボルトねじ部９のピッチより若干大きく
形成されている。The main body 2 is formed substantially in the same manner as in the first embodiment, but has no dome portion 2a outside the closed portion, and is formed flat, and an additional anode body 6 is screwed into almost the center of the closed portion. The female screw part 5 to be attached is engraved. The pitch of the female screw 3 is formed to be slightly larger than the pitch of the bolt screw portion 9.
【００２１】増設陽極体６は、本体２と同じ亜鉛合金、
マグネシウム合金、アルミニウム合金等の、ボルト８よ
りイオン化傾向の大きな低電位の合金で製作され、円柱
形状に形成され、その一方の端部には取付めねじ部５に
螺合できるねじ部７が一体に形成されている。The additional anode body 6 is made of the same zinc alloy as the main body 2,
It is made of a low-potential alloy such as a magnesium alloy or an aluminum alloy, which has a higher ionization tendency than the bolt 8, is formed in a cylindrical shape, and has a screw portion 7 which can be screwed to the female screw portion 5 at one end. Is formed.
【００２２】増設陽極体６の形状は円柱形状に限るわけ
ではなく、締付工具等が係合しやすいように平行の2平
面を設けたり、六角柱形状に形成してもよい。The shape of the additional anode body 6 is not limited to a columnar shape, but may be provided with two parallel planes or a hexagonal column shape so that a fastening tool or the like can be easily engaged.
【００２３】増設陽極体６は、本体２にねじ込まれる
と、取付めねじ部５とねじ部７および本体２の閉塞部外
面と増設陽極体６の底面とが密接し電気的導通状態で取
り付けられる。When the additional anode body 6 is screwed into the main body 2, the female mounting portion 5 and the screw portion 7 and the outer surface of the closed portion of the main body 2 and the bottom surface of the additional anode body 6 come into close contact with each other and are mounted in an electrically conductive state. .
【００２４】このような構成からなるボルトの防食用金
具１は、たとえば図５に示すように埋設された流体管の
フランジ１１、１１の接合に使用されるボルト８の腐食
防止用に使用される。パッキン１２を介して当接された
フランジ１１、１１のボルト孔に貫通したボルト８にナ
ット１０を螺合してフランジ１１、１１同士を接合し、
接合が完了したボルト８のボルトねじ部９の先端に防食
用金具１の本体２をねじ込んで取り付け、さらに本体２
の取付めねじ部５に増設陽極体６をねじ込んで取り付け
ている。The anticorrosion metal fitting 1 for a bolt having such a structure is used for preventing corrosion of a bolt 8 used for joining flanges 11 of a buried fluid pipe as shown in FIG. 5, for example. . A nut 10 is screwed into a bolt 8 penetrating through bolt holes of the flanges 11, 11 abutted via a packing 12 to join the flanges 11, 11 together.
The main body 2 of the anticorrosion fitting 1 is screwed and attached to the tip of the bolt thread portion 9 of the bolt 8 whose joining is completed.
The additional anode body 6 is screwed into the mounting female thread portion 5 of FIG.
【００２５】この場合、防食用金具１の本体２の締め付
けは、ナット１０を締め付けた工具（スパナ等）を使用
して締め付けることができ、本体２のめねじ３がボルト
ねじ部９のピッチより若干大きなピッチに形成されてい
るので、ボルト８のボルトねじ部９の表面を削りながら
取り付けられ、切削カスが収容部４に収容される。ま
た、増設陽極体６が電気的導通状態で取り付けられてい
るので、第１実施例に比べて犠牲陽極体としての防食用
金具１の質量が格段に大きくすることができる。In this case, the main body 2 of the anticorrosion fitting 1 can be tightened using a tool (spanner or the like) to which the nut 10 is tightened. Since the bolts are formed at a slightly larger pitch, they are attached while shaving the surface of the bolt thread portion 9 of the bolt 8, and the cutting waste is stored in the storage portion 4. Further, since the additional anode body 6 is attached in an electrically conductive state, the mass of the anticorrosion fitting 1 as a sacrificial anode body can be significantly increased as compared with the first embodiment.
【００２６】そして、ボルトねじ部９の表面が削り取ら
れるので、ボルト８の金属面と防食用金具１とが直接接
触して、両者は電気的導通状態となり、ボルト８を埋設
している土壌自体が電解質であるので、ボルト８よりイ
オン化傾向の大きな低電位の合金の防食用金具１とボル
ト８間には電位差が発生し、それに伴い電位差発生の陽
極側である防食用金具１を構成する合金がイオンとなっ
て土壌中に流出してこの防食用金具１のみが腐食し、よ
って陰極側となるボルト８の腐食は防止される。防食用
金具１の質量が調整できるので、ボルト８の埋設環境に
合わせて防食期間を設定して使用することができる。Then, since the surface of the bolt screw portion 9 is scraped off, the metal surface of the bolt 8 and the anticorrosion metal fitting 1 come into direct contact with each other, and both are electrically connected to each other, and the soil itself in which the bolt 8 is embedded Is an electrolyte, a potential difference is generated between the anti-corrosion metal fitting 1 of a low-potential alloy having a higher ionization tendency than the bolt 8 and the bolt 8, and the alloy constituting the anti-corrosion metal fitting 1 on the anode side of the generation of the potential difference is accordingly generated. Is discharged into the soil as ions, and only this anticorrosion fitting 1 is corroded, and thus corrosion of the bolt 8 on the cathode side is prevented. Since the mass of the anticorrosion fitting 1 can be adjusted, the anticorrosion period can be set and used according to the environment in which the bolts 8 are embedded.
【００２７】以上、本発明の実施例を図面により説明し
てきたが、本発明の具体的な構成はこれに限定されるも
のではない。Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration of the present invention is not limited to this.
【００２８】[0028]
【発明の効果】本発明によれば、防食用金具がボルトに
ねじ込まれると、めねじに設けられた表面切削手段によ
りボルトねじ部の表面が削られ、すなわちボルトねじ部
の塗料や酸化皮膜が削りとられ、防食用金具とボルトと
が直接接触して電気的導通状態となる。したがって、防
食金具を取り付けたボルトが電解質媒体（海水、地下
水、土壌等）中にあると、鉄やダクタイル鋳鉄等のボル
トよりイオン化傾向の大きな低電位の金属からなる防食
用金具が陽極となってその犠牲作用により防食電流が流
れてボルトの腐蝕が防止される。According to the present invention, when the anticorrosion fitting is screwed into the bolt, the surface of the bolt screw portion is cut by the surface cutting means provided on the female screw, that is, the paint or oxide film of the bolt screw portion is removed. It is scraped off, and the anticorrosion fitting and the bolt come into direct contact with each other to establish an electrical conduction state. Therefore, when the bolt with the anticorrosion fitting is in the electrolyte medium (seawater, groundwater, soil, etc.), the anticorrosion fitting made of a low-potential metal having a higher ionization tendency than the bolt of iron or ductile cast iron becomes the anode. Due to the sacrificial action, an anticorrosion current flows to prevent corrosion of the bolt.
【００２９】請求項２の発明によれば、防食用金具内の
めねじの谷の径や内径がボルトねじ部の外径や谷の径よ
り小径に形成されているので、防食用金具をねじ込む
と、防食用金具のねじ山とボルトのねじ山とが当接し
て、ボルトねじ部の先端側より徐々に表面を切削しなが
らねじ込まれて、電気的導通状態で取り付けることがで
きるので、ボルトを確実に防食することができる。According to the second aspect of the present invention, since the diameter and the inner diameter of the female thread in the anticorrosion metal fitting are formed to be smaller than the outer diameter and the diameter of the valley of the bolt screw portion, the anticorrosion metal fitting is screwed. The screw thread of the anticorrosion bracket and the screw thread of the bolt come into contact with each other, and the screw is screwed in while cutting the surface gradually from the tip side of the bolt screw part, and the bolt can be attached in an electrically conductive state. Corrosion can be reliably prevented.
【００３０】請求項３の発明によれば、防食用金具をね
じ込んでいくと、ピッチが異なるのでボルトのねじ山が
係合しボルトねじ部の表面を切削しながらねじ込まれ
て、電気的導通状態で取り付けることができるので、ボ
ルトを確実に防食することができる。According to the third aspect of the present invention, when the anticorrosion fitting is screwed in, the pitch is different, so that the thread of the bolt engages and is screwed in while cutting the surface of the bolt screw portion, so that the electrical conduction state is achieved. Since the bolt can be attached, the bolt can be reliably prevented from being corroded.
【００３１】請求項４の発明によれば、防食用金具の質
量を大きくすることができるので、犠牲陽極の量が大き
くなって長期間にわたってボルトの防食を行える。ま
た、収容部に切削クズを収容することができるので、切
削クズの行き場がなくなることがなく、ボルトとナット
との間に介在することがないので確実に電気的導通状態
で取り付けることができる。According to the fourth aspect of the present invention, since the mass of the anticorrosion metal fitting can be increased, the amount of the sacrificial anode is increased and the anticorrosion of the bolt can be performed for a long period of time. Further, since the cutting waste can be accommodated in the housing portion, there is no place where the cutting waste goes, and there is no intervening between the bolt and the nut, so that the mounting can be reliably performed in an electrically conductive state.
【００３２】請求項５の発明によれば、犠牲陽極体の質
量が増し長期間の防食が可能となる。According to the fifth aspect of the present invention, the mass of the sacrificial anode body is increased, and long-term corrosion prevention is possible.
【００３３】請求項６の発明によれば、増設陽極体をね
じ込むだけで取り付けることができるので、増設陽極体
の質量を調節することにより、防錆期間の制御を容易に
行える。また、増設陽極体をねじ込んで取り付けるので
防食用金具をさらに締め付けることができ、防食用金具
の取り付けが確実になる。According to the sixth aspect of the present invention, since the additional anode body can be mounted simply by screwing, the rust prevention period can be easily controlled by adjusting the mass of the additional anode body. Further, since the additional anode body is screwed in and attached, the anticorrosion metal fitting can be further tightened, and the mounting of the anticorrosion metal fitting is ensured.
【図１】本発明の第１実施例における防食用金具の
（ａ）は正面図、（ｂ）は断面図、（ｃ）は平面図、
（ｄ）は底面図である。1 (a) is a front view, FIG. 1 (b) is a cross-sectional view, and FIG. 1 (c) is a plan view of an anticorrosion fitting according to a first embodiment of the present invention.
(D) is a bottom view.
【図２】同じく、使用時の説明断面図である。FIG. 2 is also an explanatory sectional view at the time of use.
【図３】本発明の第２実施例における防食用金具の本体
の（ａ）は正面図、（ｂ）は断面図、（ｃ）は平面図、
（ｄ）は底面図である。3A is a front view, FIG. 3B is a cross-sectional view, and FIG. 3C is a plan view of the main body of the anticorrosion fitting according to the second embodiment of the present invention.
(D) is a bottom view.
【図４】同じく、増設陽極体の（ａ）は正面図、（ｂ）
は底面図である。4 (a) is a front view of the additional anode body, and FIG.
Is a bottom view.
【図５】同じく、使用時の説明断面図である。FIG. 5 is also an explanatory sectional view at the time of use.
１ 防食用金具 ２ 本体 ２ａ ドーム部 ３ めねじ ４ 収納部 ５ 取付めねじ部 ６ 増設陽極体 ７ ねじ部 ８ ボルト ９ ボルトねじ部 １０ ナット １１ フランジ １２ パッキン DESCRIPTION OF SYMBOLS 1 Corrosion prevention metal fitting 2 Main body 2a Dome part 3 Female screw 4 Storage part 5 Mounting female screw part 6 Additional anode body 7 Screw part 8 Bolt 9 Bolt screw part 10 Nut 11 Flange 12 Packing
Claims (6)
きな低電位の金属からなり、前記ボルトねじ部に螺合可
能なめねじが刻設されたナットであって、前記めねじに
は、ボルトねじ部の表面切削手段が設けられていること
を特徴とするボルトの防食用金具。1. A nut made of a low-potential metal having a higher ionization tendency than a bolt to be anticorrosion, and having a female screw engraved on said bolt screw portion, wherein said female screw has a bolt screw portion. Corrosion-proof metal fittings for bolts, characterized in that the surface cutting means is provided.
じ径が縮小するテーパめねじである請求項１に記載のボ
ルトの防食用金具。2. The anticorrosion metal fitting for a bolt according to claim 1, wherein the surface cutting means is a tapered female thread whose thread diameter decreases toward the back.
けるねじ山のピッチと異なるピッチに形成されているめ
ねじである請求項１に記載のボルトの防食用金具。3. The anticorrosion metal fitting for a bolt according to claim 1, wherein the surface cutting means is a female screw formed at a pitch different from a pitch of a screw thread in the bolt screw portion.
状に形成されるとともに、切削クズを収納する収容部が
形成されている請求項１ないし３のいずれかに記載の防
食用金具。4. The anticorrosion fitting according to any one of claims 1 to 3, wherein a back portion of the female screw portion is closed to form a cap nut, and a storage portion for storing cutting waste is formed. .
オン化傾向の大きな低電位の金属からなる増設陽極体が
電気的導通状態で取り付けられている請求項１ないし４
のいずれかに記載の防食用金具。5. An additional anode body made of a low-potential metal having a higher ionization tendency than the anticorrosion target bolt is attached to the nut in an electrically conductive state.
The anticorrosion metal fitting according to any one of the above.
され、増設陽極体が螺入して取り付けられている請求項
５に記載の防食用金具。6. The anticorrosion fitting according to claim 5, wherein a female screw portion is provided on the inner side of the female screw, and an additional anode body is screwed into the female screw portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001042479A JP2002242917A (en) | 2001-02-19 | 2001-02-19 | Corrosion resistance fitting of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001042479A JP2002242917A (en) | 2001-02-19 | 2001-02-19 | Corrosion resistance fitting of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002242917A true JP2002242917A (en) | 2002-08-28 |
Family
ID=18904768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001042479A Pending JP2002242917A (en) | 2001-02-19 | 2001-02-19 | Corrosion resistance fitting of bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002242917A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009250318A (en) * | 2008-04-04 | 2009-10-29 | Kojima Press Co Ltd | Current-carrying nut |
| JP2009293646A (en) * | 2008-06-02 | 2009-12-17 | Cosmo Koki Co Ltd | Bolt corrosion prevention device |
| JP2010214993A (en) * | 2009-03-13 | 2010-09-30 | Honda Motor Co Ltd | Fuel pipe fixing structure |
| JP2011099139A (en) * | 2009-11-05 | 2011-05-19 | Isamu Arai | Cap for corrosion prevention |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812273U (en) * | 1981-07-15 | 1983-01-26 | 日本軽金属株式会社 | Corrosion-resistant joint structure of aluminum structure |
| JPH0411911U (en) * | 1990-05-23 | 1992-01-30 | ||
| JPH0676362U (en) * | 1993-03-31 | 1994-10-28 | 株式会社スイケンテクノロジー | Anti-corrosion nut |
| JPH1162938A (en) * | 1997-08-21 | 1999-03-05 | Sugiura Seisakusho:Kk | Female screw member |
-
2001
- 2001-02-19 JP JP2001042479A patent/JP2002242917A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812273U (en) * | 1981-07-15 | 1983-01-26 | 日本軽金属株式会社 | Corrosion-resistant joint structure of aluminum structure |
| JPH0411911U (en) * | 1990-05-23 | 1992-01-30 | ||
| JPH0676362U (en) * | 1993-03-31 | 1994-10-28 | 株式会社スイケンテクノロジー | Anti-corrosion nut |
| JPH1162938A (en) * | 1997-08-21 | 1999-03-05 | Sugiura Seisakusho:Kk | Female screw member |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009250318A (en) * | 2008-04-04 | 2009-10-29 | Kojima Press Co Ltd | Current-carrying nut |
| JP2009293646A (en) * | 2008-06-02 | 2009-12-17 | Cosmo Koki Co Ltd | Bolt corrosion prevention device |
| JP2010214993A (en) * | 2009-03-13 | 2010-09-30 | Honda Motor Co Ltd | Fuel pipe fixing structure |
| JP2011099139A (en) * | 2009-11-05 | 2011-05-19 | Isamu Arai | Cap for corrosion prevention |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002242917A (en) | Corrosion resistance fitting of bolt | |
| US3726779A (en) | Marine anticorrosion anode structure | |
| JPH10147894A (en) | Method for mounting sacrificial anode and cap used for the same | |
| JPH0645687Y2 (en) | Anti-corrosion metal fittings for bolts | |
| JP4970352B2 (en) | Bolt corrosion protection device | |
| JP2007314027A (en) | Ballast tank corrosion protection member and suction bell-mouth | |
| JP4195742B2 (en) | Anti-corrosion cap | |
| JP2534329Y2 (en) | Anticorrosion bolts and anticorrosion metal fittings for bolts | |
| JPH0676362U (en) | Anti-corrosion nut | |
| JP3009397U (en) | Anti-corrosion device for bolts | |
| JPS6220490Y2 (en) | ||
| JP4206189B2 (en) | Galvanic anode body using magnetic sheet and installation method thereof | |
| JP4996435B2 (en) | Rust prevention means | |
| KR20010082429A (en) | Impressed Current Corrosion Protection System for Marine Structures | |
| JPH11108287A (en) | Rust preventing equipment for metal-made fluid pipe | |
| JP2006207000A5 (en) | ||
| JP2644591B2 (en) | Electrochemical corrosion protection components | |
| US20180282880A1 (en) | Sacrificial Collar | |
| KR200347880Y1 (en) | To protect caustic apparatus | |
| JP5402177B2 (en) | The galvanic anode body and the galvanic anode method | |
| KR200351431Y1 (en) | To protect caustic apparatus | |
| RU180152U1 (en) | DEVICE FOR PROTECTING STEEL PIPES FROM INTERNAL CORROSION | |
| CN212900306U (en) | Pipeline anticorrosion protection device in aluminum yacht | |
| JPH02190487A (en) | Method for assembling metallic product | |
| JPH0538055Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080118 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090930 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100629 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100823 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20110222 |