JPH0925922A - Bolt and method of tightening by using this bolt - Google Patents
Bolt and method of tightening by using this boltInfo
- Publication number
- JPH0925922A JPH0925922A JP17626295A JP17626295A JPH0925922A JP H0925922 A JPH0925922 A JP H0925922A JP 17626295 A JP17626295 A JP 17626295A JP 17626295 A JP17626295 A JP 17626295A JP H0925922 A JPH0925922 A JP H0925922A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- base
- sleeve
- screw shaft
- chuck
- 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.)
- Withdrawn
Links
Landscapes
- Forging (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、ベースに立設した
ときそのねじ軸部に被締付部材を介してスリーブを遊嵌
してこれをかしめ工具により被締付部材に圧接しながら
縮径させることによりスリーブの内面を前記ねじ軸部の
雄ねじに対応する雌ねじに形成するようにしたボルトお
よびこのボルトを用いた締結方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diameter reduction method in which a sleeve is loosely fitted to a threaded shaft portion of a base through a member to be fastened when the base is erected, and the sleeve is crimped to the member to be fastened by a caulking tool. The present invention relates to a bolt in which the inner surface of the sleeve is formed into a female screw corresponding to the male screw of the screw shaft portion, and a fastening method using the bolt.
【0002】[0002]
【従来の技術】ベースに立設されてそのねじ軸部に被締
付部材を介して遊嵌したスリーブをかしめ工具により被
締付部材に圧接しながら縮径させてスリーブの内面を前
記ねじ軸部の雄ねじに対応する雌ねじに形成するように
したボルトは従来から知られているが、従来のこの種ボ
ルトは、図6、図7に示されるように、ボルト主体21
が、ボルト頭部20に続くねじ軸部22の先方にこのね
じ軸部22よりも細径の細径ねじ部24を破断用の細頸
部25を介して連設したものであって、このような植込
ボルトは、ベースBに前記ボルト頭部20をもって溶接
してねじ軸部22をベース上に立設したうえ、これに被
締付部材Wを介して植込ボルトより軟質の塑性変形可能
なスリーブ23を遊嵌し、次に、かしめ工具30により
前記スリーブ23を被締付部材Wに圧接するとともに縮
径させて内面に前記ねじ軸部22に対応するように形成
された雌ねじがねじ軸部22に螺着一体化されたナット
とし、これにより被締付部材WをベースBに緊締すると
ともに、前記細径ねじ部24に螺合させた雌ねじ式のチ
ャック31で細径ねじ部24を牽引することにより前記
細頸部25から細径ねじ部24を破断除去するようにし
ている。2. Description of the Related Art A sleeve which is erected on a base and is loosely fitted to a screw shaft portion through a member to be fastened is pressed against the member to be fastened by a caulking tool to reduce the diameter of the inner surface of the sleeve. A bolt designed to be formed into an internal thread corresponding to the external thread of the portion is conventionally known. However, this type of conventional bolt has a bolt main body 21 as shown in FIGS.
However, a small-diameter screw portion 24 having a diameter smaller than that of the screw shaft portion 22 is connected to the tip of the screw shaft portion 22 following the bolt head 20 through a thin neck portion 25 for breaking. The stud bolt is welded to the base B with the bolt head 20 and the screw shaft portion 22 is erected on the base. A possible sleeve 23 is loosely fitted, and then the caulking tool 30 presses the sleeve 23 against the member W to be tightened and reduces the diameter to form an internal thread formed on the inner surface so as to correspond to the screw shaft portion 22. A nut integrally screwed to the screw shaft portion 22 is used to tighten the member W to be fastened to the base B, and a female screw type chuck 31 screwed to the thin screw portion 24 is used to tighten the thin screw portion. By pulling 24, So that breaking remove screw portion 24.
【0003】ところが、このような緊締方法に用いられ
るボルトは、前記したようにボルト主体21に形成され
る破断用の細径ねじ部24がねじ軸部22より径が小さ
いうえにリードも異なるため、ボルト主体21にねじを
転造する際、ねじ軸部22と細径ねじ部24とを同時に
転造することはできず、ねじ転造を複数回繰り返す必要
があり生産性が悪かった。しかも、チャック31のねじ
部31aと螺合する細径ねじ部24を牽引して細頸部2
5を破断させるため、破断に要する力に耐えるだけの相
当なねじ部長さが必要となり、製造に要する材料が多く
なって製造コストが上昇するうえに、廃棄される部分が
膨大なものとなる問題があった。However, in the bolt used in such a tightening method, as described above, the small diameter screw portion 24 for breaking formed in the bolt main body 21 has a smaller diameter than the screw shaft portion 22 and also has a different lead. When the thread is rolled on the bolt main body 21, the screw shaft portion 22 and the small-diameter thread portion 24 cannot be rolled at the same time, and the thread rolling needs to be repeated a plurality of times, resulting in poor productivity. Moreover, the narrow neck portion 2 is pulled by pulling the small-diameter screw portion 24 that is screwed with the screw portion 31a of the chuck 31.
In order to rupture No. 5, a considerable screw length is required to withstand the force required for rupture, the material required for production increases, the production cost rises, and the portion to be discarded becomes enormous. was there.
【0004】[0004]
【発明が解決しようとする課題】本発明は前記のような
問題を解決し、製造工数が少なく製造が容易なうえに材
料の使用量を減らして製造コストを低減できるボルトお
よびこのボルトを用いた締結方法を提供することにあ
る。DISCLOSURE OF THE INVENTION The present invention solves the above problems and uses a bolt that can be manufactured with a small number of man-hours, is easy to manufacture, and can reduce the manufacturing cost by reducing the amount of materials used. To provide a fastening method.
【0005】[0005]
【課題を解決するための手段】前記のような課題を解決
した本発明は、ベースに溶接可能なボルト主体のねじ軸
部の先端に破断用の細頸部を介してチャック係止用の拡
大頭部を連設してあることを特徴とするボルトと、ベー
スに溶接可能なボルト主体のねじ軸部の先端に破断用の
細頸部を介してチャック係止用の拡大頭部を連設してあ
るボルトをベースに溶接して該ベース上に立設されるね
じ軸部に被締付部材を介して塑性変形可能なスリーブを
遊嵌し、このスリーブをかしめ工具によって側面よりか
しめながら被締付部材に圧接してスリーブを内面に雄ね
じ部による雌ねじ部が形成されたナットに成形してこの
ナットにより被締付部材をベースに緊締するとともに、
かしめ工具に内装されたチャックの係止爪をボルト主体
の拡大頭部に係止させて牽引することにより拡大頭部を
前記細頸部から破断除去することを特徴とする締結方法
とよりなるものである。SUMMARY OF THE INVENTION The present invention, which has solved the above-mentioned problems, is an expansion for chuck locking through a thin neck portion for breaking at the tip of a screw shaft portion mainly composed of a bolt that can be welded to a base. The head is connected in series, and an enlarged head for locking the chuck is installed in series through a narrow neck part for breaking at the tip of the screw shaft part that is mainly a bolt that can be welded to the base. A bolt that has been welded is welded to a base, and a plastically deformable sleeve is loosely fitted to a screw shaft portion that is erected on the base through a tightening member, and this sleeve is caulked from a side surface by a caulking tool. While press-contacting the tightening member, the sleeve is molded into a nut having a female screw portion formed by a male screw portion on the inner surface, and the tightened member is tightened to the base by this nut,
A fastening method, characterized in that the locking claw of a chuck built into a caulking tool is locked to an enlarged head mainly composed of bolts and pulled to thereby break and remove the enlarged head from the narrow neck portion. Is.
【0006】[0006]
【発明の実施の形態】本発明のボルトにおいて、ボルト
主体の先端部に形成される拡大頭部の形状としては、取
扱上の安全性を考慮して略半球状としておくことが好ま
しく、また、ボルト軸部に形成される細頸部としては、
拡大頭部の下面が平らなかしめ工具係止部に形成される
ようにねじ軸部にねじのない短い先細テーパ軸部を介し
て拡大頭部を続かせることにより形成したものとする
か、ねじ軸部の先端に拡大頭部を連設するとともに該拡
大頭部の直下においてねじ軸部の先端に円弧状環溝を設
けることにより形成したものとしてもよい。BEST MODE FOR CARRYING OUT THE INVENTION In the bolt of the present invention, the shape of the enlarged head formed at the tip of the bolt is preferably substantially hemispherical in consideration of handling safety. As the narrow neck formed on the bolt shaft,
The lower surface of the expansion head should be formed by connecting the expansion head through a short tapered taper shaft that does not have a screw so that the lower surface of the expansion head is formed by a flat caulking tool locking part, or by screwing. It may be formed by connecting an enlarged head portion to the tip of the shaft portion and providing an arcuate ring groove at the tip of the screw shaft portion immediately below the enlarged head portion.
【0007】[0007]
【実施例】次に、本発明を図示の実施例に基づいて詳細
に説明する。図1は本発明のボルトの第1の実施例を示
すもので、1はベースに立設される本発明のボルトのボ
ルト主体であり、このボルト主体1の先端部にはかしめ
工具係止用の拡大頭部2が形成され、この拡大頭部2の
直下にはねじ軸部4の先端を狭窄させた拡大頭部破断用
の細頸部3が形成されている。このねじ軸部4の先端に
形成される細頸部3は、拡大頭部2の下面が平らなチャ
ック係止部2aに形成されるように拡大頭部2の直下に
おいてねじ軸部4を狭窄させて短い先細テーパ軸部4a
とすることにより形成し、この細頸部3により拡大頭部
2が破断分離されやすくしている。5はボルト主体1の
溶接用のボルト頭部であり、該ボルト頭部5の上面には
溶接用の突起5aが3ヵ所突設されている。なお、6は
ボルト主体1のねじ軸部4に形成される雄ねじ部であ
る。Next, the present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a first embodiment of a bolt of the present invention. Reference numeral 1 is a bolt main body of the bolt of the present invention which is erected on a base, and a tip portion of the bolt main body 1 is for locking a caulking tool. The enlarged head portion 2 is formed, and the narrow neck portion 3 for breaking the enlarged head portion is formed immediately below the enlarged head portion 2 so that the tip of the screw shaft portion 4 is narrowed. The narrow neck portion 3 formed at the tip of the screw shaft portion 4 constricts the screw shaft portion 4 immediately below the enlarged head 2 so that the lower surface of the enlarged head 2 is formed into the flat chuck engaging portion 2a. Short taper shaft 4a
The narrow neck portion 3 facilitates breakage and separation of the enlarged head portion 2. Reference numeral 5 denotes a welding bolt head of the bolt main body 1. On the upper surface of the bolt head 5, welding projections 5a are provided at three places. Incidentally, 6 is a male screw portion formed on the screw shaft portion 4 of the bolt main body 1.
【0008】このように構成されたボルトを用いた締結
方法は、先ず、図2に示されるように、ボルト頭部5の
上面に形成した溶接用の突起5aをもってベースBにボ
ルト主体1を溶接し、このベースBに立設させたボルト
主体1のねじ軸部4に被締付部材Wをその透孔Hをもっ
て嵌め込んでボルト頭部5の座面で受けさせる。そし
て、このボルト軸部4にスリーブ7を遊嵌する。このス
リーブ7はボルト主体1のねじ軸部4に遊嵌されたうえ
雄ねじ部6にかしめられる前記ボルト主体1よりは軟質
で塑性変形可能な金属よりなり、このスリーブ7は主筒
部7aと六角部に続く鍔部7bとよりなるもので、被締
付部材W上に鍔部7bが添装されるように前記ねじ軸部
4にスリーブ7を遊嵌する。In the fastening method using the bolt thus constructed, first, as shown in FIG. 2, the bolt main body 1 is welded to the base B with the welding projection 5a formed on the upper surface of the bolt head 5. Then, the tightened member W is fitted into the threaded shaft portion 4 of the bolt main body 1 erected on the base B through the through hole H and received by the seat surface of the bolt head 5. Then, the sleeve 7 is loosely fitted to the bolt shaft portion 4. The sleeve 7 is made of a metal that is softer and plastically deformable than the bolt main body 1 that is loosely fitted to the screw shaft portion 4 of the bolt main body 1 and crimped to the male screw portion 6, and the sleeve 7 is composed of a main cylinder portion 7a and a hexagonal shape. The sleeve 7 is loosely fitted to the screw shaft portion 4 so that the collar portion 7b is mounted on the member W to be tightened.
【0009】そして、かしめ工具10のかしめヘッド1
1をスリーブ7の主筒部7aに嵌合させ、このかしめ工
具10によりスリーブ7を被締付部材Wに圧接するとと
もに主筒部7aを狭窄圧着させて縮径させ、主筒部7a
の内面に雌ねじを刻設する。このとき、チャック12の
係止爪12aは拡大頭部2と当接し、かしめヘッド11
内に嵌挿されているチャック保持筒14の先細孔14a
に嵌挿されている先細形状のチャック12はばね13の
弾発力に抗して後退し、この後退によりチャック12は
拡開されて拡大頭部2は係止爪12a内に入り込む。Then, the caulking head 1 of the caulking tool 10
1 is fitted into the main cylinder portion 7a of the sleeve 7, and the caulking tool 10 presses the sleeve 7 against the member W to be clamped, and the main cylinder portion 7a is narrowed and crimped to reduce the diameter.
Internal thread is engraved on the inner surface of. At this time, the locking claw 12a of the chuck 12 contacts the enlarged head 2, and the caulking head 11
The tip hole 14a of the chuck holding cylinder 14 fitted inside
The taper-shaped chuck 12 fitted in the retracted part retreats against the elastic force of the spring 13, and by this retreat, the chuck 12 is expanded and the expanded head 2 enters the locking claw 12a.
【0010】次に、図3に示されるように、かしめヘッ
ド11をスリーブ7に圧着させたままかしめ工具10の
チャック保持筒14をチャック12とともに上昇させれ
ば、チャック部12にチャックされた拡大頭部2は牽引
されて図4に示されるように拡大頭部破断用の細頸部3
より破断分離されることとなり、被締付部材Wはボルト
主体1に固定されることとなる。また、かしめられたス
リーブ7はボルト主体1の雄ねじ部6に対応する雌ねじ
部が形成されるため、スリーブ7の外形に成形されてい
る六角形の部分にレンチ等の回動工具を係合させてナッ
ト化されているスリーブ7を回動させれば、スリーブ7
はボルト主体1から外すことができる。また、図5は第
2の実施例を示すもので、ボルト頭部5の座面に溶接用
の突起5aを形成した点と、ねじ軸部4の先端に拡大頭
部2を連設するとともに該拡大頭部2の直下においてね
じ軸部の先端に円弧状環溝4bを設けて形成した細頸部
3により拡大頭部2が破断分離されやすくしている点が
前記した第1の実施例と相違するのみで、他は同一の構
成であるため説明を省略する。この実施例では、かしめ
前のスリーブ7の主筒部7aに六角部が形成されたもの
としたが、鍔部7bまで段付無しのスリーブとしてかし
め時に多角部が形成されるかしめ工具により締結するも
のとしても良い。Next, as shown in FIG. 3, if the chuck holding cylinder 14 of the caulking tool 10 is lifted up together with the chuck 12 while the caulking head 11 is pressed against the sleeve 7, the chucked portion 12 is enlarged by the chuck portion 12. The head 2 is pulled and, as shown in FIG. 4, the narrow neck 3 for expanding the head is broken.
As a result, the to-be-tightened member W is fixed to the bolt main body 1 by being fractured and separated. Further, the crimped sleeve 7 is formed with a female screw portion corresponding to the male screw portion 6 of the bolt main body 1, so that a rotating tool such as a wrench is engaged with the hexagonal portion formed on the outer shape of the sleeve 7. If the sleeve 7 that is made into a nut is rotated, the sleeve 7
Can be removed from the bolt body 1. Further, FIG. 5 shows a second embodiment, in which a point where a projection 5a for welding is formed on the seating surface of the bolt head 5 and the enlarged head 2 is continuously provided at the tip of the screw shaft portion 4. The first embodiment described above in that the enlarged head 2 is easily broken and separated by the narrow neck portion 3 formed by providing the circular arc groove 4b at the tip of the screw shaft portion immediately below the enlarged head 2. The description is omitted because the other configurations are the same and the other configurations are the same. In this embodiment, the hexagonal portion is formed on the main tubular portion 7a of the sleeve 7 before crimping, but the flange 7b is a stepless sleeve, and the polygonal portion is formed during crimping. Good as a thing.
【0011】[0011]
【発明の効果】前記の説明から明らかなように、本発明
のボルトは、ベースに溶接可能なボルト主体のねじ軸部
の先端に破断用の細頸部を介してチャック係止用の拡大
頭部を連設してあるから、かしめ工具に確実にチャック
することができるうえに、従来のようにねじ螺合による
チャックではないので拡大頭部は小さくてよく、捨て去
る材料を少なくすることができ経済的である。しかも、
拡大頭部が小さいことにより製造時における材料も従来
と比較して大幅に減少させることができるので、材料費
を節減でき安価に製造できる。さらに、ボルト主体に雄
ねじ部を転造する際に、細頸部および拡大頭部を同時に
転造により形成することができるので、従来より製造工
数を減少させることができ、生産性を高めて製造コスト
を下げることができる。また、このボルトを用いた締結
方法によれば、前記のような植込ボルトによってもたら
される効果の外にねじ込みを行うことなく強固な締結状
態を簡単に行うことができるので、作業の効率化を行え
る利点がある。 従って、本発明は従来の問題点を解決
したボルトおよびこれを用いた締結方法として業界の発
展に寄与するところ極めて大なものである。As is apparent from the above description, the bolt of the present invention is an enlarged head for chuck locking through a breaking narrow neck portion at the tip of a screw shaft portion of a bolt main body that can be welded to a base. Since the parts are arranged in series, it is possible to securely chuck to the caulking tool, and since it is not a chuck by screwing as in the past, the enlarged head can be small and the material to be discarded can be reduced. It is economical. Moreover,
Since the enlarged head is small, the material used during manufacturing can be significantly reduced as compared with the conventional one, so that the material cost can be reduced and the manufacturing can be performed at low cost. Furthermore, when rolling the male screw part mainly on the bolt, the narrow neck part and the enlarged head part can be formed by rolling at the same time. The cost can be reduced. Further, according to the fastening method using this bolt, a strong fastening state can be easily performed without screwing in addition to the effect brought by the stud bolt as described above, so that work efficiency is improved. There is an advantage that can be done. Therefore, the present invention is extremely significant in that it contributes to the development of the industry as a bolt and a fastening method using the bolt that have solved the conventional problems.
【図1】本発明の第1の実施例を示す一部切欠正面図で
ある。FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.
【図2】本発明の第1の実施例のかしめを行なう前の状
態を示す一部切欠正面図である。FIG. 2 is a partially cutaway front view showing a state before caulking according to the first embodiment of the present invention.
【図3】本発明の第1の実施例のかしめ状態を示す一部
切欠正面図である。FIG. 3 is a partially cutaway front view showing a crimped state of the first embodiment of the present invention.
【図4】本発明の第1の実施例のかしめ完了を示す一部
切欠正面図である。FIG. 4 is a partially cutaway front view showing completion of crimping according to the first embodiment of the present invention.
【図5】本発明の第2の実施例を示す一部切欠正面図で
ある。FIG. 5 is a partially cutaway front view showing a second embodiment of the present invention.
【図6】従来のボルト用締付装置を示す一部切欠正面図
である。FIG. 6 is a partially cutaway front view showing a conventional bolt tightening device.
【図7】従来のボルト用締付装置のかしめ状態を示す一
部切欠正面図である。FIG. 7 is a partially cutaway front view showing a caulking state of a conventional bolt tightening device.
1 ボルト主体 2 拡大頭部 2a チャック係止部 3 細頸部 4 ねじ軸部 4a 先細テーパ軸部 4b 円弧状環溝 1 Main body of bolt 2 Enlarged head 2a Chuck locking part 3 Neck neck part 4 Screw shaft part 4a Tapered taper shaft part 4b Arc ring groove
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【手続補正書】[Procedure amendment]
【提出日】平成7年7月27日[Submission date] July 27, 1995
【手続補正1】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0002[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【0002】[0002]
【従来の技術】ベースに立設されてそのねじ軸部に被締
付部材を介して遊嵌したスリーブをかしめ工具により被
締付部材に圧接しながら縮径させてスリーブの内面を前
記ねじ軸部の雄ねじに対応する雌ねじに形成するように
したボルトは従来から知られているが、従来のこの種ボ
ルトは、図6、図7に示されるように、ボルト主体21
が、ボルト頭部20に続くねじ軸部22の先方にこのね
じ軸部22よりも細径の細径ねじ部24を破断用の細頸
部25を介して連設したものであって、このようなボル
トは、ベースBに前記ボルト頭部20をもって溶接して
ねじ軸部22をベース上に立設したうえ、これに被締付
部材Wを介してボルトより軟質の塑性変形可能なスリー
ブ23を遊嵌し、次に、かしめ工具30により前記スリ
ーブ23を被締付部材Wに圧接するとともに縮径させて
内面に前記ねじ軸部22に対応するように形成された雌
ねじがねじ軸部22に螺着一体化されたナットとし、こ
れにより被締付部材WをベースBに緊締するとともに、
前記細径ねじ部24に螺合させた雌ねじ式のチャック3
1で細径ねじ部24を牽引することにより前記細頸部2
5から細径ねじ部24を破断除去するようにしている。2. Description of the Related Art A sleeve which is erected on a base and is loosely fitted to a screw shaft portion through a member to be fastened is pressed against the member to be fastened by a caulking tool to reduce the diameter of the inner surface of the sleeve. A bolt designed to be formed into an internal thread corresponding to the external thread of the portion is conventionally known. However, this type of conventional bolt has a bolt main body 21 as shown in FIGS.
However, a small-diameter screw portion 24 having a diameter smaller than that of the screw shaft portion 22 is connected to the tip of the screw shaft portion 22 following the bolt head 20 through a thin neck portion 25 for breaking. Bol like
TMG, after having erected the threaded shaft portion 22 on the base and welded with a the bolt head 20 to the base B, which in the plastically deformable sleeve 23 softer than the bolt through the Hishimezuke member W Yu Then, the sleeve 23 is pressed against the member W to be tightened by the caulking tool 30 and the diameter of the sleeve 23 is reduced to form an internal thread on the inner surface corresponding to the screw shaft portion 22. The integrated nut is used to tighten the tightened member W to the base B, and
Female screw type chuck 3 screwed to the small-diameter screw portion 24.
1 by pulling the small-diameter screw portion 24
The small-diameter threaded portion 24 is removed by breaking from 5.
【手続補正2】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0011[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【0011】[0011]
【発明の効果】前記の説明から明らかなように、本発明
のボルトは、ベースに溶接可能なボルト主体のねじ軸部
の先端に破断用の細頸部を介してチャック係止用の拡大
頭部を連設してあるから、かしめ工具に確実にチャック
することができるうえに、従来のようにねじ螺合による
チャックではないので拡大頭部は小さくてよく、捨て去
る材料を少なくすることができ経済的である。しかも、
拡大頭部が小さいことにより製造時における材料も従来
と比較して大幅に減少させることができるので、材料費
を節減でき安価に製造できる。さらに、ボルト主体に雄
ねじ部を転造する際に、細頸部および拡大頭部を同時に
転造により形成することができるので、従来より製造工
数を減少させることができ、生産性を高めて製造コスト
を下げることができる。また、このボルトを用いた締結
方法によれば、前記のようなボルトによってもたらされ
る効果の外にねじ込みを行うことなく強固な締結状態を
簡単に行うことができるので、作業の効率化を行える利
点がある。 従って、本発明は従来の問題点を解決した
ボルトおよびこれを用いた締結方法として業界の発展に
寄与するところ極めて大なものである。As is apparent from the above description, the bolt of the present invention is an enlarged head for chuck locking through a breaking narrow neck portion at the tip of a screw shaft portion of a bolt main body that can be welded to a base. Since the parts are arranged in series, it is possible to securely chuck to the caulking tool, and since it is not a chuck by screwing as in the past, the enlarged head can be small and the material to be discarded can be reduced. It is economical. Moreover,
Since the enlarged head is small, the material used during manufacturing can be significantly reduced as compared with the conventional one, so that the material cost can be reduced and the manufacturing can be performed at low cost. Furthermore, when rolling the male screw part mainly on the bolt, the narrow neck part and the enlarged head part can be formed by rolling at the same time. The cost can be reduced. Further, according to the fastening method using this bolt, a strong fastening state can be easily performed without screwing in addition to the effect brought about by the bolt as described above, which is an advantage that work efficiency can be improved. There is. Therefore, the present invention is extremely significant in that it contributes to the development of the industry as a bolt and a fastening method using the bolt that have solved the conventional problems.
Claims (5)
じ軸部(4) の先端に破断用の細頸部(3) を介してチャッ
ク係止用の拡大頭部(2) を連設してあることを特徴とす
るボルト。1. An enlarged head (2) for locking a chuck is connected to a tip of a screw shaft (4) of a bolt main body (1) that can be welded to a base through a narrow neck (3) for breaking. A bolt characterized by being installed.
(2a)とした略半球状のものである請求項1に記載のボル
ト。2. The enlarged head (2) has a chuck engaging portion on the lower surface.
The bolt according to claim 1, which has a substantially hemispherical shape (2a).
かせた無ねじの先細テーパ軸部(4a)により形成されてい
る請求項1または2に記載のボルト。3. The bolt according to claim 1, wherein the narrow neck portion (3) is formed by a non-threaded tapered taper shaft portion (4a) following the tip of the screw shaft portion (4).
いてねじ軸部(4) の先端に設けた無ねじの円弧状環溝(4
b)により形成されている請求項1または2に記載のボル
ト。4. The narrow neck portion (3) has a thread-free circular ring groove (4) provided at the tip of the screw shaft portion (4) immediately below the enlarged head portion (2).
The bolt according to claim 1 or 2, which is formed by b).
じ軸部の先端に破断用の細頸部を介してチャック係止用
の拡大頭部を連設してあるボルトをベースに溶接して該
ベース上に立設されるねじ軸部に被締付部材を介して塑
性変形可能なスリーブを遊嵌し、このスリーブをかしめ
工具によって側面よりかしめながら被締付部材に圧接し
てスリーブの内面にねじ軸部の雄ねじ部による雌ねじ部
が形成されたナットに成形してこのナットにより被締付
部材をベースに緊締するとともに、かしめ工具に内装さ
れたチャックの係止爪をボルト主体の拡大頭部に係止さ
せて牽引することにより拡大頭部を前記細頸部から破断
除去することを特徴とする締結方法。5. A bolt, in which an enlarged head for chuck locking is connected to the tip of a screw shaft portion mainly composed of a bolt that can be implanted in a base through a thin neck portion for breaking, is welded to the base. A sleeve that is plastically deformable is loosely fitted to the screw shaft part that is erected on the base through the member to be clamped, and this sleeve is crimped from the side while crimping the sleeve to the inner surface of the sleeve by crimping. A nut with a female thread formed by the male thread of the screw shaft is formed, and this nut tightens the member to be fastened to the base, and the locking claw of the chuck built into the caulking tool expands mainly with bolts. A fastening method, characterized in that the enlarged head is broken and removed from the narrow neck portion by being locked and pulled by.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17626295A JPH0925922A (en) | 1995-07-12 | 1995-07-12 | Bolt and method of tightening by using this bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17626295A JPH0925922A (en) | 1995-07-12 | 1995-07-12 | Bolt and method of tightening by using this bolt |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0925922A true JPH0925922A (en) | 1997-01-28 |
Family
ID=16010501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17626295A Withdrawn JPH0925922A (en) | 1995-07-12 | 1995-07-12 | Bolt and method of tightening by using this bolt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0925922A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017101830A (en) * | 2012-09-13 | 2017-06-08 | アブデル ユーケー リミテッド | Lockbolt |
US10393164B2 (en) | 2013-09-09 | 2019-08-27 | Avdel Uk Limited | Lockbolt |
-
1995
- 1995-07-12 JP JP17626295A patent/JPH0925922A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017101830A (en) * | 2012-09-13 | 2017-06-08 | アブデル ユーケー リミテッド | Lockbolt |
US10393164B2 (en) | 2013-09-09 | 2019-08-27 | Avdel Uk Limited | Lockbolt |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20021001 |