JPH07139532A - Nut joining structure - Google Patents
Nut joining structureInfo
- Publication number
- JPH07139532A JPH07139532A JP29167093A JP29167093A JPH07139532A JP H07139532 A JPH07139532 A JP H07139532A JP 29167093 A JP29167093 A JP 29167093A JP 29167093 A JP29167093 A JP 29167093A JP H07139532 A JPH07139532 A JP H07139532A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- base material
- standing wall
- lateral groove
- view
- 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
- Joining Of Building Structures In Genera (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属製のナットが金属
製の母材に加締め固定されたナット接合構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nut joining structure in which a metal nut is caulked and fixed to a metal base material.
【０００２】[0002]
【従来の技術】この種の従来技術としては、図１０に示
すようなピアスナットが一般に知られている。これは矩
形状のナット１の対向外側面に横溝２が設けられ、この
横溝２に母材３のナット係合孔４周縁部を加締めること
で、ナット１と母材３とが接合一体化されている。2. Description of the Related Art As a conventional technique of this kind, a pierce nut as shown in FIG. 10 is generally known. This is provided with a lateral groove 2 on the opposing outer surface of a rectangular nut 1, and by crimping the peripheral edge portion of the nut engaging hole 4 of the base material 3 to the lateral groove 2, the nut 1 and the base material 3 are integrally joined. Has been done.
【０００３】図１１（ａ），（ｂ），（ｃ）は、図１０
に示すピアスナット１を母材３に接合する工程を説明す
る図である。まず図１１（ａ）に示すように、ナット１
に整合する矩形状の孔６の形成されたダイ５に、母材３
を載せ、図１１（ｂ）に示すように、母材３の上方に位
置させたナット１をプランシャ７を使って圧下させるこ
とで、ナット１の端縁コーナー部１ａとダイ５の係合孔
周縁コーナー部５ａとによって、母材３をナット外形整
合位置で剪断する。次に、図１１（ｃ）に示すように、
母材３の切断端縁部を、ダイ５側の孔６周縁に形成した
リブ５ｂとナット側のフランジ１ｂとによってプレス
し、ナット１の横溝２内に切断端縁部を加締めること
で、ナット１が母材３に接合一体化されるようになって
いる。11 (a), 11 (b) and 11 (c) are shown in FIG.
It is a figure explaining the process of joining the pierce nut 1 shown in FIG. First, as shown in FIG. 11A, the nut 1
To the die 5 having a rectangular hole 6 aligned with the base material 3
11B, the nut 1 positioned above the base material 3 is pressed down by the plunger 7 so that the edge corner portion 1a of the nut 1 and the die 5 are engaged with each other. The base material 3 is sheared at the nut contour matching position by the hole peripheral edge corner portion 5a. Next, as shown in FIG.
By pressing the cut edge portion of the base material 3 with the rib 5b formed on the periphery of the hole 6 on the die 5 side and the flange 1b on the nut side, and swaging the cut edge portion in the lateral groove 2 of the nut 1, The nut 1 is joined and integrated with the base material 3.
【０００４】[0004]
【発明の解決しようとする課題】しかし前記した従来の
接合構造では、母材３の切断端縁部を板厚方向に押し潰
すことで、母材３の切断端縁部がナット１の横溝２に入
り込んで、両者１，３が加締め固定されるため、加締め
部の剪断方向の厚さｄが板厚ｔ以下（図１０参照）とな
って、それだけナット軸方向に作用する荷重に対する接
合部の剪断強度が弱いという問題がある。However, in the above-mentioned conventional joining structure, the cutting edge of the base material 3 is crushed in the plate thickness direction so that the cutting edge of the base material 3 is lateral groove 2 of the nut 1. As they enter and are caulked and fixed to each other, the thickness d in the shearing direction of the caulking portion becomes equal to or less than the plate thickness t (see FIG. 10), so that the joint is applied to the load acting in the axial direction of the nut. There is a problem that the shear strength of the part is weak.
【０００５】またナット１の端縁コーナー部１ａは、母
材３を剪断する働きがあるため、直角に鋭っており、触
れることによってけがをする場合がある。さらに図１２
に示されるように、ピアスナット１にボルト８を螺合さ
せて、被締結部材９を固定するが、ナット１の横溝２に
母材３の切断端部が加締め固定される構造であるため、
母材３からナット１が突出した形態となり、母材３を被
締結部材９に接した状態とすることができない。なお母
材３と被締結部材９とを面一とするには、図１３に示さ
れるように、ナット１の周辺領域３ｂをエンボス加工す
ればよいが、それだけ工程が増え加工が面倒であるとい
う問題がある。Further, since the end edge corner portion 1a of the nut 1 has a function of shearing the base material 3, it is sharp at a right angle and may be injured by touching. Furthermore, FIG.
As shown in, the bolt 8 is screwed into the pierce nut 1 to fix the member 9 to be fastened, but the cut end portion of the base material 3 is caulked and fixed to the lateral groove 2 of the nut 1. ,
Since the nut 1 projects from the base material 3, the base material 3 cannot be in contact with the fastened member 9. In order to make the base material 3 and the member 9 to be fastened flush with each other, as shown in FIG. 13, the peripheral area 3b of the nut 1 may be embossed, but the number of steps is increased and the processing is troublesome. There's a problem.
【０００６】本発明は前記従来技術の問題点に鑑みなさ
れたもので、その目的は加締め部における剪断強度に優
れるとともに、ナットが母材から突出しない形態に接合
できるナット接合構造を提供することにある。The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a nut joining structure which is excellent in shear strength at a crimped portion and which can be joined in a form in which a nut does not protrude from a base material. It is in.
【０００７】[0007]
【課題を解決するための手段】前記目的を達成するため
に、請求項１に係るナット接合構造においては、加締め
加工可能な金属からなる母材に形成されたナット係合孔
に、外側面に横溝の形成された金属製ナットが係合され
るとともに、ナット係合孔周縁に周設された立壁が縦方
向に押し潰され、塑性変形した立壁の一部が前記横溝に
入り込んでナット部材と母材とが接合一体化するように
したものである。In order to achieve the above object, in the nut joining structure according to claim 1, a nut engaging hole formed in a base material made of a crimpable metal is provided with an outer surface. The metal nut having the lateral groove formed therein is engaged with the vertical wall, and the standing wall circumferentially provided around the periphery of the nut engaging hole is crushed in the vertical direction, so that a part of the plastically deformed standing wall enters the lateral groove and the nut member is formed. The base material and the base material are joined and integrated.
【０００８】[0008]
【作用】立壁の横溝の溝巾を板厚以上とすることで、加
締め部のナット軸方向の厚さを板厚以上にでき、それだ
け接合部の剪断強度を高くできる。また縦方向に押し潰
されて塑性変形した立壁の一部がナットの横溝に入り込
んでナットと母材とが接合されているので、ナットを母
材の立壁非形成側の表面から突出しない形態に構成でき
る。When the groove width of the lateral groove of the upright wall is equal to or larger than the plate thickness, the thickness of the caulking portion in the axial direction of the nut can be equal to or larger than the plate thickness, and the shear strength of the joint portion can be increased accordingly. Also, a part of the vertical wall that has been crushed and plastically deformed enters the lateral groove of the nut to join the nut and the base material, so that the nut does not protrude from the surface of the base material on the side where the vertical wall is not formed. Can be configured.
【０００９】ナットには、ピアスナットの様に、母材を
剪断する働きが不要なため、ナットの端縁コーナー部を
鋭く形成する必要はなく、それだけ作業者にとって安全
である。Unlike the pierce nut, the nut does not need to have a function of shearing the base material. Therefore, it is not necessary to sharply form the edge corner portion of the nut, which is safer for the operator.
【００１０】[0010]
【実施例】次に、本発明の実施例を図面に基づいて説明
する。図１〜図７は本発明に係るナット接合構造の一実
施例を示すもので、図１はナット接合部の斜視図、図２
は同ナット接合部の縦断面図、図３は同ナット接合部の
平面図、図４はナットを母材に接合するための接合装置
の縦断面図、図５は接合装置のベースに載置した母材の
立壁内にナットを位置決めする様子を示す斜視図、図６
は立壁を塑性変形させるパンチ先端の斜視図、図７は接
合装置の動作を説明する断面図である。Embodiments of the present invention will now be described with reference to the drawings. 1 to 7 show an embodiment of a nut joint structure according to the present invention. FIG. 1 is a perspective view of a nut joint portion, and FIG.
Is a vertical cross-sectional view of the nut joining portion, FIG. 3 is a plan view of the nut joining portion, FIG. 4 is a vertical cross-sectional view of a joining device for joining a nut to a base material, and FIG. 5 is placed on a base of the joining device. 6 is a perspective view showing how the nut is positioned in the standing wall of the formed base material, FIG.
FIG. 7 is a perspective view of a punch tip that plastically deforms the standing wall, and FIG. 7 is a cross-sectional view illustrating the operation of the joining device.
【００１１】これらの図において、符号１０は、内周に
雌ねじ部１２が形成された円筒型の金属製ナットで、ナ
ット１０の外周面の周方向４ヵ所には、後述する母材２
０の板厚ｔより大きい溝巾Ｗの横溝１４が形成されてい
る。符号１６は、ナット１０の下端面に設けられた半径
方向に延びる十字状のＶ溝で、後述するパンチ４５の４
ヵ所の突出先端部４６に対しナット１０の横溝１４を位
置決めするための位置決め用の溝である。In these drawings, reference numeral 10 is a cylindrical metal nut having an internal thread portion 12 formed on the inner periphery thereof, and a base material 2 described later is provided at four circumferential positions on the outer peripheral surface of the nut 10.
A lateral groove 14 having a groove width W larger than the plate thickness t of 0 is formed. Reference numeral 16 is a cross-shaped V groove provided on the lower end surface of the nut 10 and extending in the radial direction.
It is a positioning groove for positioning the lateral groove 14 of the nut 10 with respect to the protruding tip portion 46 at one place.
【００１２】母材２０には、ナット１０の外形に整合す
る円孔２１が設けられ、この円孔２１の周縁部には、絞
り加工により立ち上げられた立壁２２が周設されてい
る。立壁２２内にはナット１０が係合されるとともに、
立壁２２の横溝１４対応位置が軸方向に押圧され、塑性
変形した立壁２２の一部がこの横溝１４に入り込んで、
立壁２２とナット１０とが接合一体化されている。A circular hole 21 matching the outer shape of the nut 10 is provided in the base material 20, and a peripheral wall 22 raised by drawing is provided around the peripheral edge of the circular hole 21. While the nut 10 is engaged in the standing wall 22,
A position of the standing wall 22 corresponding to the lateral groove 14 is pressed in the axial direction, and a part of the vertically deformed standing wall 22 enters the lateral groove 14,
The standing wall 22 and the nut 10 are joined and integrated.
【００１３】ナット１０の横溝１４に入り込んで、ナッ
ト１０と母材２０とを接合する立壁２２の一部２２ａの
厚さＷは、母材２０の板厚ｔより大きいため、図１０，
１３に示すピアスナットを用いた従来の接合構造に比べ
て、ナット軸方向に作用する力に対する剪断強度が高い
といえる。ナット１０を立壁２２に接合するには、図４
に示す接合装置を使用する。Since the thickness W of the portion 22a of the standing wall 22 that joins the nut 10 and the base material 20 into the lateral groove 14 of the nut 10 is larger than the plate thickness t of the base material 20, FIG.
It can be said that the shear strength against the force acting in the axial direction of the nut is higher than that of the conventional joint structure using the pierce nut shown in FIG. To join the nut 10 to the upright wall 22, see FIG.
Use the joining device shown in.
【００１４】図４符号３０は、母材２０を担持するベー
スであり、ベース３０の母材担持面３１の中央には、頭
部端面にナット１ａのＶ溝１６に係合する横断面三角型
の凸条部３３が設けられたボルト３２が螺着されてい
る。符号４０は昇降可能なラムで、ラム４０には、圧縮
コイルスプリング４２により下方に付勢され、ナット１
０の外形に整合する外形をもつ円柱型押え部材４１と、
圧縮コイルスプリング４４により下方に付勢され、立壁
２２の外形に係合する内径をもつ円筒型押え部材４３
と、立壁２２と同一の横断面形状をもち、ラム４０に固
定されて、前記両押え部材４１，４３間に介装されて、
両部材４１，４３に対し軸方向相対摺動可能な円筒型の
パンチ４５とが設けられている。Reference numeral 30 in FIG. 4 is a base for carrying the base material 20, and a base material carrying surface 31 of the base 30 has a triangular cross section at the center of the base material carrying surface 31 which engages with the V groove 16 of the nut 1a at the head end surface. The bolt 32 provided with the ridge portion 33 is screwed. Reference numeral 40 denotes a ram that can be moved up and down, and the ram 40 is urged downward by a compression coil spring 42 so that the nut 1
A cylindrical pressing member 41 having an outer shape matching the outer shape of 0,
A cylindrical pressing member 43 having an inner diameter that is urged downward by a compression coil spring 44 and engages with the outer shape of the standing wall 22.
And has the same cross-sectional shape as the standing wall 22, is fixed to the ram 40, and is interposed between the pressing members 41 and 43,
A cylindrical punch 45 that is slidable in the axial direction relative to both members 41 and 43 is provided.
【００１５】パンチ４５の先端部は、図６に示されるよ
うに、周方向等分４ヵ所位置が円弧状に突出した形状に
形成されており、この突出部４６が立壁２２を軸方向に
押し潰し、これによって塑性変形した立壁２２の一部が
横溝１４内に入り込んで、立壁２２とナット１０とが接
合される。パンチ４５が立壁２２を押し潰す際には、押
え部材４１はナット１０を、押え部材４３は母材２０の
立壁２２の周辺をそれぞれベース３０の母材担持面３１
に押圧して、ナット１０と母材２０が相対回転しないよ
うになっている。As shown in FIG. 6, the tip of the punch 45 is formed in a shape in which four circumferentially equally divided positions project in an arc shape, and this projecting portion 46 pushes the standing wall 22 in the axial direction. A part of the vertical wall 22 that is crushed and plastically deformed by this is inserted into the lateral groove 14, and the vertical wall 22 and the nut 10 are joined. When the punch 45 crushes the standing wall 22, the holding member 41 holds the nut 10 and the holding member 43 surrounds the standing wall 22 of the base material 20 around the base material carrying surface 31 of the base 30.
The nut 10 and the base material 20 are prevented from rotating relative to each other by pressing.
【００１６】次に、図４および図７を参照して、ナット
１０を母材２０の立壁２２に接合する手順について説明
する。まず予め絞り加工により、母材２０に円孔２１お
よび所定高さの立壁２２を形成しておく。次に図４に示
すように、母材２０をベース３０の母材担持面３１に載
せる。このとき、ベース３０の母材担持面３１から突出
する凸条部３３が立壁２２内にくるように、母材２０を
位置させることで、母材担持面３１に対し母材２０は自
ずと位置決めされる。次に、立壁２２の上方からナット
１０を立壁２２内に挿入し、Ｖ溝１６を凸条部３３に合
わせて、ナット１０を周方向に位置決めする。次にラム
４０を下降させると、押え部材４１，４３がナット１
０，母材２０をベース３０に押圧し、パンチ４５が圧下
してパンチ４５の突出端部４６が立壁２２を軸方向に押
し潰し、塑性変形した立壁２２の一部が横溝１４に入り
込んで立壁２２とナット１０とが接合される。Next, the procedure for joining the nut 10 to the standing wall 22 of the base material 20 will be described with reference to FIGS. First, a circular hole 21 and a standing wall 22 having a predetermined height are formed in the base material 20 by drawing in advance. Next, as shown in FIG. 4, the base material 20 is placed on the base material carrying surface 31 of the base 30. At this time, the base material 20 is positioned so that the ridges 33 projecting from the base material carrying surface 31 of the base 30 are located inside the standing wall 22, so that the base material 20 is automatically positioned with respect to the base material carrying surface 31. It Next, the nut 10 is inserted into the standing wall 22 from above the standing wall 22, the V groove 16 is aligned with the protruding portion 33, and the nut 10 is positioned in the circumferential direction. Next, when the ram 40 is lowered, the pressing members 41 and 43 are moved to the nut 1
0, the base material 20 is pressed against the base 30, the punch 45 is pressed down, the protruding end portion 46 of the punch 45 axially crushes the standing wall 22, and a part of the plastically deformed standing wall 22 enters the lateral groove 14 and stands up. 22 and the nut 10 are joined.
【００１７】図８および図９は本発明の第２の実施例で
あるナット接合部を示し、図８はナット接合部の斜視
図、図９はナット接合部の平面図である。前記した第１
の実施例では、ナット１０の周方向等分４ヵ所に横溝１
４が形成されていたが、本実施例におけるナット１０Ａ
では、横溝１４Ａが周設されて、ナット１０Ａの全周が
立壁２２によって接合されており、それだけナット軸方
向に作用する荷重に対する剪断強度が高いといえる。そ
の他は前記した第１の実施例と同様であり、同一の符号
を付すことによりその説明は省略する。8 and 9 show a nut joint portion according to a second embodiment of the present invention, FIG. 8 is a perspective view of the nut joint portion, and FIG. 9 is a plan view of the nut joint portion. First mentioned above
In the embodiment of the above, the lateral grooves 1 are provided at four positions equally divided in the circumferential direction of the nut 10.
4 was formed, the nut 10A in the present embodiment
Then, since the lateral groove 14A is provided around and the entire circumference of the nut 10A is joined by the standing wall 22, it can be said that the shear strength against a load acting in the axial direction of the nut is high. Others are the same as those in the first embodiment described above, and the description thereof will be omitted by giving the same reference numerals.
【００１８】なおこの実施例構造において使用するパン
チは、立壁２２の先端面を均一に押圧できる先端部を持
つ円筒型であることはいうまでもない。また前記した２
つの実施例では、いずれもナット１０，１０Ａが円筒型
に形成されていたが、円筒型に限定されるものではな
く、一般に使用される六角ナットであってもよい。そし
て六角ナットの場合には、既存の六角ナットの外側面に
横溝を複数個設けるか又は周設すればよく、既存のナッ
トを加工して使用する場合には、それだけナットのコス
トを安価にできる。Needless to say, the punch used in the structure of this embodiment is of a cylindrical type having a tip portion capable of uniformly pressing the tip surface of the standing wall 22. Also, the above 2
In each of the embodiments, the nuts 10 and 10A are formed in a cylindrical shape, but the nuts are not limited to the cylindrical shape, and may be a commonly used hexagonal nut. In the case of a hexagonal nut, it is sufficient to provide a plurality of lateral grooves on the outer surface of the existing hexagonal nut or to provide a circumferential groove. When the existing nut is processed and used, the cost of the nut can be reduced by that much. .
【００１９】[0019]
【発明の効果】以上の説明から明らかなように、本発明
に係るナット接合構造によれば、立壁の横溝の溝巾を板
厚以上とすることで、加締め部のナット軸方向の厚さを
板厚以上にでき、これによっての剪断強度の高いナット
接合構造が得られる。また本発明では、母材にエンボス
加工等を施すことなく、ナットを母材の立壁非形成側の
表面から突出しない形態に構成できるので、このナット
を使ってボルト・ナット締結する被締結部材を母材に密
着して取付けることができる。As is apparent from the above description, according to the nut joining structure of the present invention, the thickness of the caulking portion in the nut axial direction is set by setting the groove width of the lateral groove of the standing wall to the plate thickness or more. Can be made thicker than the plate thickness, whereby a nut joint structure with high shear strength can be obtained. Further, in the present invention, the nut can be configured not to project from the surface of the base material on the side where the standing wall is not formed without embossing the base material. Can be attached closely to the base material.
【００２０】また従来のピアスナットの様に端縁コーナ
ー部を鋭角状に形成する必要がないので、端縁コーナー
部の加工精度が要求されず、しかも作業者にとって触れ
てもけがをしないため安全である。Further, unlike the conventional pierce nut, it is not necessary to form the edge corner portion into an acute angle shape, so that the processing accuracy of the edge edge corner portion is not required and the operator is not injured even if touched, which is safe. Is.
【図１】本発明の第１の実施例であるナット接合構造で
あるナット接合部の斜視図FIG. 1 is a perspective view of a nut joint portion having a nut joint structure according to a first embodiment of the present invention.
【図２】同ナット接合部の縦断面図FIG. 2 is a vertical cross-sectional view of the nut joint portion.
【図３】同ナット接合部の平面図FIG. 3 is a plan view of the nut joint portion.
【図４】ナットを母材に接合するための接合装置の縦断
面図FIG. 4 is a vertical sectional view of a joining device for joining a nut to a base material.
【図５】接合装置のベースに載置した母材の立壁内にナ
ットを位置決めする様子を示す斜視図FIG. 5 is a perspective view showing how the nut is positioned in the standing wall of the base material placed on the base of the joining device.
【図６】立壁を塑性変形させるパンチ先端の斜視図FIG. 6 is a perspective view of the punch tip that plastically deforms the standing wall.
【図７】接合装置の動作を説明する断面図FIG. 7 is a cross-sectional view illustrating the operation of the joining device.
【図８】本発明の第２の実施例であるナット接合部の斜
視図FIG. 8 is a perspective view of a nut joint portion according to a second embodiment of the present invention.
【図９】同ナット接合部の平面図FIG. 9 is a plan view of the nut joint portion.
【図１０】従来技術であるピアスナットを使用したナッ
ト接合部の斜視図FIG. 10 is a perspective view of a nut joint portion using a pierce nut which is a conventional technique.
【図１１】ピアスナットを母材に接合する手順を説明す
る説明図FIG. 11 is an explanatory diagram illustrating a procedure for joining a pierce nut to a base material.
【図１２】ピアスナット接合部に他の部材をボルト締結
した状態の断面図FIG. 12 is a sectional view showing a state in which another member is bolted to the pierce nut joint portion.
【図１３】ピアスナットの周りにエンボス加工した母材
に他の部材をボルトナット締結した状態断面図FIG. 13 is a sectional view showing a state in which other members are fastened to the base material embossed around the pierce nut with bolts and nuts.
１０，１０Ａ ナット １４，１４Ａ 横溝 ２０ 母材 ２１ナット係合孔である円孔 ２２ 立壁 ４５ パンチ ４６ パンチの突出端部 10, 10A nut 14, 14A lateral groove 20 base material 21 circular hole which is a nut engagement hole 22 standing wall 45 punch 46 protruding end of punch
Claims (1)
成されたナット係合孔に、外側面に横溝の形成された金
属製ナットが係合されるとともに、ナット係合孔周縁に
周設された立壁が縦方向に押し潰され、塑性変形した立
壁の一部が前記横溝に入り込んでナット部材と母材とが
接合一体化されたことを特徴とするナット接合構造。1. A nut made of metal capable of being caulked is engaged with a nut engagement hole formed in a base material, and a metal nut having a lateral groove formed on its outer surface is engaged with the nut engagement hole. A nut joining structure characterized in that the provided standing wall is crushed in the vertical direction, and a part of the plastically deformed standing wall enters the lateral groove to join and integrate the nut member and the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29167093A JPH07139532A (en) | 1993-11-22 | 1993-11-22 | Nut joining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29167093A JPH07139532A (en) | 1993-11-22 | 1993-11-22 | Nut joining structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07139532A true JPH07139532A (en) | 1995-05-30 |
Family
ID=17771915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29167093A Pending JPH07139532A (en) | 1993-11-22 | 1993-11-22 | Nut joining structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07139532A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050911A1 (en) * | 2006-10-27 | 2008-05-02 | Nippon Steel Corporation | Punching method and punching device employing hydro-form and hydro-formed part and structure body |
| JP2008518162A (en) * | 2004-08-30 | 2008-05-29 | アキュメント インテレクチュアル プロパティーズ エルエルシー | Multi-lobe type lock bolt and system |
| KR100906792B1 (en) * | 2007-08-27 | 2009-07-09 | 주식회사 엔비티 | The stud and making mathod thereof |
| KR100972223B1 (en) * | 2008-02-21 | 2010-07-26 | 주식회사 엔비티 | The stud and making mathod thereof |
| JP2021066562A (en) * | 2019-10-24 | 2021-04-30 | 和光工業株式会社 | Pantograph jack |
-
1993
- 1993-11-22 JP JP29167093A patent/JPH07139532A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008518162A (en) * | 2004-08-30 | 2008-05-29 | アキュメント インテレクチュアル プロパティーズ エルエルシー | Multi-lobe type lock bolt and system |
| WO2008050911A1 (en) * | 2006-10-27 | 2008-05-02 | Nippon Steel Corporation | Punching method and punching device employing hydro-form and hydro-formed part and structure body |
| JP2008110349A (en) * | 2006-10-27 | 2008-05-15 | Nippon Steel Corp | Method for piercing hole using hydroforming, piercing apparatus, component manufactured by hydroforming, and structure |
| US8001819B2 (en) | 2006-10-27 | 2011-08-23 | Nippon Steel Corporation | Piercing method and piercing apparatus using hydroforming and hydroformed part and structure |
| KR100906792B1 (en) * | 2007-08-27 | 2009-07-09 | 주식회사 엔비티 | The stud and making mathod thereof |
| KR100972223B1 (en) * | 2008-02-21 | 2010-07-26 | 주식회사 엔비티 | The stud and making mathod thereof |
| JP2021066562A (en) * | 2019-10-24 | 2021-04-30 | 和光工業株式会社 | Pantograph jack |
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