JP3589279B2 - Brace material - Google Patents

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Publication number
JP3589279B2
JP3589279B2 JP04144998A JP4144998A JP3589279B2 JP 3589279 B2 JP3589279 B2 JP 3589279B2 JP 04144998 A JP04144998 A JP 04144998A JP 4144998 A JP4144998 A JP 4144998A JP 3589279 B2 JP3589279 B2 JP 3589279B2
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Prior art keywords
stiffening tube
axial force
force member
stiffening
brace
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JPH11241411A (en
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久哉 加村
茂樹 伊藤
弘海 下川
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JFE Steel Corp
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JFE Steel Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、建築物等の鋼構造物のブレース材に関する。
【０００２】
【従来の技術】
ブレース材は建築物等の鋼構造物に従来より数多く使用されており、座屈の防止に関する技術としては、例えば特開平７−３２４３７７号公報に開示された鋼管で補剛したアンボンド鉄骨ブレースの発明がある。
【０００３】
図１３は同公報に示されたアンボンド鉄骨ブレースの正面図を示し、図１４は図１３の断面図、図１５は図１３に示したブレースを建物の柱梁架構へ適用した例を示している。
このアンボンド鉄骨ブレースは軸力材としてＨ形鋼５１を使用し、その外周に、座屈補剛材として円形鋼管５２をほぼ外接する状態にゆるくかぶせてあり、円形鋼管５２は長さ方向の略中央部位を、前記Ｈ形鋼管５１のウェブを直角に貫通する向きのずれ止めボルト５３でＨ形鋼管５１に止着されている。
【０００４】
上記のように鋼管で補剛したアンボンド鉄骨ブレースは、図１５のように、鉄骨柱５４と鉄骨梁５５で形成された架構の面内にＨ形鋼５１のフランジが曲げを負担する向き（強軸）の配置（梁鉄骨のウェブとＨ形鋼のウェブとが平行な向き）として、Ｈ形鋼５１の両端が梁中央部の接合部材５６及び架構内隅部の接合部材５７と各々ウェブはボルト接合、フランジは溶接接合により組み入れて設置されている。
【０００５】
図１６、図１７は同公報に開示された他のブレースの例を示したものである。図１６は軸力材として十字状材６１を使用し、補剛鋼管として円形鋼管５２を使用した例であり、図１７はは軸力材として十字状材６１を使用し、補剛鋼管として角形鋼管６２を使用した例である。
【０００６】
【発明が解決しようとする課題】
しかしながら、従来例においては軸力材がほぼ外接する補剛鋼管を用いたために補剛鋼管の径が小さくなり、補剛鋼管の断面２次モーメントが減少し、ブレース材の耐全体座屈性能が低下してしまった。このため、ブレース材の限界長さが短くなり、階高の高い架構や梁スパンの長い架構には使用できないという問題があった。
【０００７】
本発明はかかる問題点を解決するためになされたもので、ブレース材の幅を可能な限り広げずに（幅を変えないで）補剛管の強度を上げて耐全体座屈性能を向上させ、階高の高い架構にも使用できるブレース材を得ることを目的とする。
【０００８】
【課題を解決するための手段】
本発明に係るブレース材は、平鋼からなる軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、
前記軸力材は前記補剛管に座屈が阻まれることを特徴とするものである。
【０００９】
また、前記アングル材の一辺が前記平鋼に直交するように前記補剛管の外周面に接合され、前記アングル材の前記平鋼に直交する側の辺を他の辺より長く設定したことを特徴とするものである。
【００１０】
さらに、断面十字形の軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、
前記軸力材は前記補剛管に座屈が阻まれることを特徴とするものである。
【００１１】
【発明の実施の形態】
参考例．
図１は、本発明の実施の形態にかかるブレース材の参考例における軸方向に垂直な断面図である。図において、１は平鋼からなる軸力材、３は軸力材１が挿通された内側補剛管、５は内側補剛管３が挿通された外側補剛管である。
軸力材１は断面矩形状の平板からなる。また、内側補剛管３は断面がほぼ正方形からなり、内側補剛管３の内側に軸力材１が対角配置されている。
軸力材１と内側補剛管３との間には小さな隙間が設けられており、軸力材１の側部は内側補剛管３によって拘束されないようになっている。
【００１２】
外側補剛管５は断面が内側補剛管３と同様のほぼ正方形からなり、内側補剛管３に対して４５度だけ回転させた状態で配置されている。したがって、内側補剛管３の四隅の頂点が外側補剛管５の各辺の中間に位置している。
【００１３】
図２は、図１のＡ−Ａ断面図である。図２に示すように、軸力材１は内側・外側補剛管３，５より長めに形成されており、両端部には図示しない柱または梁に取付けるためのボルト孔（図示せず）が設けられている。
なお、ブレース材の両端部においては、軸力材１と内側補剛管３及び内側補剛管３と外側補剛管５の間にそれぞれがずれるのを防止するためのスポット溶接７が行われている。ただし、スポット溶接７に代えて他の手段、例えばクリップのようなもので止めるようにしてもよい。
【００１４】
図３は、参考例のブレース材を、柱と梁で構成される架構部に取り付けた状態を示した斜視図である。なお、説明を容易にするために、図中右側のブレース材は補剛管を省略してある。
図において、９，１１は柱、１３，１５は柱９，１１間に設置された梁である。１７，１９は架構の隅に設置されたガセットプレート、２１は上側の梁の下部中央部に設置されたガセットプレートである。２５は軸力材１の端部に設置された十字状の接続部材である。軸力材１は幅方向が架構の面に平行になるように設置されている（図中右側のブレース参照）。このような向きに設置することによって、軸力材、ガットプレート及び梁のウェブの向きが一致し、力の伝達がスムーズに行われる。
軸力材１を上記のような向きに設置すると、外側補剛管５の側面が架構の壁面方向と一致することになり、壁材の収まりがよくなる。
【００１５】
以上のように構成されたブレース材は、地震時においては軸方向の力を受けて降伏する。このとき、軸力材１は架構の面外方向に撓んで座屈しようとするが、内側補剛管３及び外側補剛管５に座屈が阻まれて軸方向の降伏を行うのでエネルギーを充分吸収することができる。しかも、外側補剛管５の外径は内側補剛管３の２1/2 倍（ルート２倍）になり、曲げ剛性が約４倍と高くなるので、ブレース材の耐全体座屈性能が非常に向上する。その一方、壁方向の厚みは外側補剛管５の厚み分しか大きくならないので、壁材の収まりも非常によい。
【００１６】
なお、上記の説明では外側補剛管５と内側補剛管３との位置ズレを防止するために、端部にスポット溶接をする例を示したが、図４に示すように、外側補剛管５と内側補剛管３との間に回転防止用のプレート３０を設置するようにしてもよい。
【００１７】
この参考例については、軸力材、内側補剛管３及び外側補剛管５について種々の態様が考えられる。図５〜図８はこれら他の態様の説明図である。以下、図５〜図８に基づいて他の態様を説明する。図５に示したものは、図１に示したものにおける断面正方形の外側補剛管５を断面が円形のものにしたものである。また、図６に示したものは、図１における平鋼の軸力材１を十字状にしたものである。
【００１８】
さらに、図７に示したものは、図６における断面正方形の外側補剛管５を断面が円形のものにしたものである。また、図８に示したものは、図６における断面正方形の内側補剛管３を断面が円形のものにしたものである。
【００１９】
参考例．
図９は本発明の参考例の説明図であり、ブレース材の軸線に垂直な断面図である。本参考例においては、前述の参考例における外側補剛管５に代えて、チャンネル材を補剛管の外面に接合したものである。
図９において、３１，３３は補剛管３（前述の参考例における内側補剛管に相当する。）の外周面に溶接により接合されたチャンネル材である。チャンネル材３１，３３は補剛管３の角部を跨ぐようにして設置されている。なお、チャンネル材は軸力材の両面に対向するように設置される。軸力材１が撓んだ際に、該軸力材１の応力によって曲がろうとする補剛管３を補剛するためには、かかる位置に設ける必要があるからである。
【００２０】
この参考例によれば、前述の参考例の場合には内側補剛管３と外側補剛管５の精度管理が必要であったのに比較して、ほとんどその必要がないので、製作が簡易となる。
【００２１】
実施の形態．
図１０は本発明の実施の形態にかかるブレース材の説明図である。この例は、図９に示したチャンネル材３１，３３に代えて、アングル材３５〜３８を補剛管３の外周面に接合したものである。この場合にはさらに、精度管理が不要となる。
【００２２】
なお、図１０においては、アングル材３５〜３８は両辺が同じ長さのものを使用した例を示したが、図１１に示すように、軸力材１の撓む方向における補剛管３の曲げ剛性が高くなるように、アングル材の辺の長さを変えるようにしてもよい。このようにすることで、材料を節約した効率的な補剛が可能となる。
【００２３】
図１２はさらに別の態様の説明図である。この例は、図１０に示した平鋼の軸力材１に代えて十字状の軸力材１を用いたものである。
【００２４】
【発明の効果】
本発明によれば以下の効果が得られる。
平鋼からなる軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、前記軸力材は前記補剛管に座屈が阻まれることを特徴とするから、ブレース部材の幅を可能な限り広げずに（幅を変えないで）補剛管の強度を上げて耐全体座屈性能を向上でき、階高の高い架構にも使用できるブレース材を得ることができ、さらに、精度が要求されず製作が容易になる。
【００２５】
さらに、前記アングル材の一辺が前記平鋼に直交するように前記補剛管の外周面に接合され、前記アングル材の前記平鋼に直交する側の辺を他の辺より長く設定したことにより、必要な補剛を少ない材料で実現できる。
【００２６】
また、断面十字形の軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、前記軸力材は前記補剛管に座屈が阻まれることを特徴とするから、上記と同様の効果が得られる。
【００２７】
【図面の簡単な説明】
【図１】本発明の実施の形態にかかるブレース材の参考例における軸方向に垂直な断面図である。
【図２】図１のＡ−Ａ断面図である。
【図３】参考例のブレース材を、柱と梁で構成される架構部に取り付けた状態を示した斜視図である。
【図４】参考例の他の態様の説明図である。
【図５】参考例の他の態様の説明図である。
【図６】参考例の他の態様の説明図である。
【図７】参考例の他の態様の説明図である。
【図８】参考例の他の態様の説明図である。
【図９】参考例の他の態様の説明図である。
【図１０】本発明の実施の形態にかかるブレース材の説明図である。
【図１１】実施の形態の他の態様の説明図である。
【図１２】実施の形態の他の態様の説明図である。
【図１３】従来のブレース材の正面図である。
【図１４】図１３の軸方向に垂直な断面図である。
【図１５】従来のブレース材の取付状態の説明図である。
【図１６】従来のブレース材の他の例の説明図である。
【図１７】従来のブレース材の他の例の説明図である。
【符号の説明】
１ 軸力材
３ 内側補剛管
５ 外側補剛管[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bracing material for a steel structure such as a building.
[0002]
[Prior art]
A large number of brace materials have been used for steel structures such as buildings, and techniques for preventing buckling include, for example, the invention of an unbonded steel frame brace stiffened with a steel pipe disclosed in JP-A-7-324377. There is.
[0003]
FIG. 13 shows a front view of an unbonded steel brace shown in the publication, FIG. 14 shows a cross-sectional view of FIG. 13, and FIG. 15 shows an example in which the brace shown in FIG. 13 is applied to a beam-column frame of a building. .
The unbonded steel frame brace uses an H-shaped steel 51 as an axial force member, and its outer periphery is loosely covered with a circular steel tube 52 as a buckling stiffener so as to substantially circumscribe the circular steel tube 52. The central portion is fastened to the H-shaped steel pipe 51 with a stopper bolt 53 that penetrates the web of the H-shaped steel pipe 51 at right angles.
[0004]
As shown in FIG. 15, the unbonded steel frame brace stiffened by the steel pipe as described above has a direction in which the flange of the H-shaped steel 51 bears bending in the plane of the frame formed by the steel column 54 and the steel beam 55 (strong). As the arrangement of the shafts (the direction in which the web of the beam steel frame and the web of the H-section steel are parallel), the both ends of the H-section steel 51 are joined to the joining member 56 at the center of the beam and the joining member 57 at the corner in the frame. Bolt connection and flange are installed by welding connection.
[0005]
16 and 17 show examples of other braces disclosed in the publication. FIG. 16 shows an example in which a cruciform member 61 is used as an axial force member and a circular steel tube 52 is used as a stiffening steel tube. FIG. This is an example in which a steel pipe 62 is used.
[0006]
[Problems to be solved by the invention]
However, in the conventional example, the diameter of the stiffened steel pipe is reduced due to the use of the stiffened steel pipe in which the axial force material is almost circumscribed, the second moment of area of the stiffened steel pipe is reduced, and the overall buckling resistance of the brace material is reduced. It has dropped. For this reason, the limit length of a brace material became short, and there was a problem that it could not be used for a frame with a high floor height or a frame with a long beam span.
[0007]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and increases the strength of a stiffening tube without increasing the width of a brace material as much as possible (without changing the width) to improve the overall buckling resistance. It is an object of the present invention to obtain a brace material which can be used for a frame having a high floor.
[0008]
[Means for Solving the Problems]
The brace material according to the present invention is an axial force member made of flat steel, a square stiffening tube in which the axial force member is inserted with a gap in a diagonal arrangement, and joined to an outer peripheral surface of the stiffening tube. And an angle material for stiffening the stiffening tube,
The axial force member is characterized in that buckling is prevented by the stiffening tube.
[0009]
Further, one side of the angle material is joined to the outer peripheral surface of the stiffening tube so as to be orthogonal to the flat steel, and a side of the angle material orthogonal to the flat steel is set to be longer than other sides. It is a feature .
[0010]
Further, an axial force member having a cross-shaped cross section, a rectangular stiffening tube into which the axial force member is inserted with a gap provided in a diagonal arrangement, and the stiffening tube joined to the outer peripheral surface of the stiffening tube With stiffening angle material,
The axial force member is characterized in that buckling is prevented by the stiffening tube.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Reference example.
Figure 1 is a vertical sectional view definitive axially Reference Example brace member according to the embodiment of the present invention. In the drawing, reference numeral 1 denotes an axial stiffener made of flat steel, 3 denotes an inner stiffening tube through which the axial stiffener 1 is inserted, and 5 denotes an outer stiffening tube through which the inner stiffening tube 3 is inserted.
The axial force member 1 is formed of a flat plate having a rectangular cross section. The inner stiffening tube 3 has a substantially square cross section, and the axial force members 1 are arranged diagonally inside the inner stiffening tube 3.
A small gap is provided between the axial force member 1 and the inner stiffening tube 3 so that the side portion of the axial force member 1 is not restricted by the inner stiffening tube 3.
[0012]
The outer stiffening tube 5 has a substantially square cross section similar to that of the inner stiffening tube 3 and is arranged in a state of being rotated by 45 degrees with respect to the inner stiffening tube 3. Therefore, the vertices of the four corners of the inner stiffening tube 3 are located in the middle of each side of the outer stiffening tube 5.
[0013]
FIG. 2 is a sectional view taken along line AA of FIG. As shown in FIG. 2, the axial force member 1 is formed longer than the inner and outer stiffening tubes 3 and 5, and has bolt holes (not shown) at both ends for attaching to columns or beams (not shown). Is provided.
At both ends of the brace material, spot welding 7 for preventing displacement between the axial force member 1 and the inner stiffening tube 3 and between the inner stiffening tube 3 and the outer stiffening tube 5 is performed. ing. However, the spot welding 7 may be replaced by other means, for example, a clip.
[0014]
FIG. 3 is a perspective view showing a state in which the brace material of the reference example is attached to a frame portion composed of columns and beams. For the sake of simplicity, the brace material on the right side of the figure omits the stiffening tube.
In the figure, 9 and 11 are columns, and 13 and 15 are beams installed between the columns 9 and 11. Reference numerals 17 and 19 denote gusset plates provided at corners of the frame, and reference numeral 21 denotes a gusset plate provided at the lower center of the upper beam. Reference numeral 25 denotes a cross-shaped connecting member provided at an end of the axial force member 1. The axial force member 1 is installed so that the width direction is parallel to the surface of the frame (see the brace on the right side in the figure). By installing in such a direction, the directions of the axial force member, the gut plate, and the web of the beam coincide, and the transmission of the force is performed smoothly.
When the axial force member 1 is installed in the above-described direction, the side surface of the outer stiffening tube 5 coincides with the direction of the wall surface of the frame, so that the wall material is easily accommodated.
[0015]
The brace material configured as described above yields by receiving an axial force during an earthquake. At this time, the axial force member 1 bends in the out-of-plane direction of the frame and tries to buckle, but the buckling is prevented by the inner stiffening tube 3 and the outer stiffening tube 5 and yields in the axial direction. Can be sufficiently absorbed. In addition, the outer diameter of the outer stiffening tube 5 is 21/2 times the root of the inner stiffening tube 3 (double the route), and the bending stiffness is increased to about 4 times. Greatly improve. On the other hand, the thickness in the wall direction is increased only by the thickness of the outer stiffening tube 5, so that the wall material can be accommodated very well.
[0016]
In the above description, an example is shown in which spot welding is performed on the ends in order to prevent positional deviation between the outer stiffening tube 5 and the inner stiffening tube 3. However, as shown in FIG. A plate 30 for preventing rotation may be provided between the pipe 5 and the inner stiffening pipe 3.
[0017]
Regarding this reference example , various modes can be considered for the axial force member, the inner stiffening tube 3 and the outer stiffening tube 5. 5 to 8 are explanatory diagrams of these other modes. Hereinafter, another embodiment will be described with reference to FIGS. FIG. 5 shows an outer stiffening tube 5 having a square cross section in FIG. 1 with a circular cross section. FIG. 6 is a cross-sectional view of the flat steel axial force member 1 shown in FIG.
[0018]
Further, what is shown in FIG. 7 is a cross-section of the outer stiffening tube 5 having a square cross section in FIG. 6 having a circular cross section. FIG. 8 shows an inner stiffening tube 3 having a square cross section in FIG. 6 with a circular cross section.
[0019]
Reference example.
FIG. 9 is an explanatory view of the reference example of the present invention, and is a cross-sectional view perpendicular to the axis of the brace material. In this embodiment, a channel material is joined to the outer surface of the stiffening tube in place of the outer stiffening tube 5 in the above-described reference example .
In FIG. 9, reference numerals 31 and 33 denote channel members welded to the outer peripheral surface of the stiffening tube 3 (corresponding to the inner stiffening tube in the above-described reference example). The channel members 31 and 33 are installed so as to straddle the corners of the stiffening tube 3. In addition, the channel material is installed so as to face both surfaces of the axial force material. This is because when the axial force member 1 is bent, it is necessary to provide the stiffening tube 3 at such a position in order to stiffen the stiffening tube 3 which is to be bent by the stress of the axial force member 1.
[0020]
According to this reference example , since the precision control of the inner stiffening tube 3 and the outer stiffening tube 5 is required in the case of the above-described reference example, there is almost no need for the accuracy control, so that the production is simplified. It becomes.
[0021]
Embodiment.
FIG. 10 is an explanatory diagram of the brace material according to the embodiment of the present invention . In this example, angle members 35 to 38 are joined to the outer peripheral surface of the stiffening tube 3 instead of the channel members 31 and 33 shown in FIG. In this case, accuracy control becomes unnecessary.
[0022]
10 shows an example in which the angle members 35 to 38 have the same length on both sides, but as shown in FIG. 11, the stiffening tube 3 in the bending direction of the axial force member 1 is used. You may make it change the length of the side of an angle material so that bending rigidity may become high. By doing so, efficient stiffening can be achieved while saving material.
[0023]
FIG. 12 is an explanatory diagram of still another mode. In this example, a cross-shaped axial force member 1 is used in place of the flat steel axial force member 1 shown in FIG.
[0024]
【The invention's effect】
According to the present invention, the following effects can be obtained.
An axial force member made of flat steel, a square stiffening tube into which the axial force member is inserted with a gap in a diagonal arrangement, and stiffening of the stiffening tube joined to an outer peripheral surface of the stiffening tube And the axial force member is characterized in that the stiffening tube is prevented from buckling, so that the brace member is stiffened without widening as much as possible (without changing the width). By increasing the strength of the pipe, the overall buckling resistance can be improved, and a brace material that can be used in a frame with a high floor can be obtained. Further, the precision is not required, and the production is easy.
[0025]
Further, by joining one side of the angle material to the outer peripheral surface of the stiffening tube so as to be orthogonal to the flat steel, by setting a side of the angle material orthogonal to the flat steel to be longer than other sides. The necessary stiffening can be realized with a small amount of material.
[0026]
Further, an axial force member having a cross-shaped cross section, a square stiffening tube in which the axial force member is inserted with a gap in a diagonal arrangement, and the stiffening tube joined to the outer peripheral surface of the stiffening tube An angle member for stiffening is provided, and the axial force member is characterized in that buckling is prevented by the stiffening tube, so that the same effect as described above can be obtained.
[0027]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view perpendicular to the axial direction in a reference example of a brace material according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a perspective view showing a state in which the brace material of the reference example is attached to a frame portion composed of columns and beams.
FIG. 4 is an explanatory diagram of another embodiment of the reference example.
FIG. 5 is an explanatory diagram of another embodiment of the reference example.
FIG. 6 is an explanatory diagram of another embodiment of the reference example.
FIG. 7 is an explanatory diagram of another embodiment of the reference example.
FIG. 8 is an explanatory diagram of another embodiment of the reference example.
FIG. 9 is an explanatory diagram of another embodiment of the reference example.
FIG. 10 is an explanatory diagram of a brace material according to an embodiment of the present invention.
FIG. 11 is an explanatory diagram of another mode of the embodiment.
FIG. 12 is an explanatory diagram of another mode of the embodiment.
FIG. 13 is a front view of a conventional brace material.
14 is a sectional view perpendicular to the axial direction of FIG.
FIG. 15 is an explanatory view of a state of attachment of a conventional brace material.
FIG. 16 is an explanatory view of another example of a conventional brace material.
FIG. 17 is an explanatory view of another example of a conventional brace material.
[Explanation of symbols]
1 axial force member 3 inner stiffening tube 5 outer stiffening tube

Claims (3)

平鋼からなる軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、
前記軸力材は前記補剛管に座屈が阻まれることを特徴とするブレース材。An axial force member made of flat steel, a square stiffening tube into which the axial force member is inserted with a gap in a diagonal arrangement, and stiffening of the stiffening tube joined to an outer peripheral surface of the stiffening tube Angle material for
A brace member, wherein the axial force member prevents buckling of the stiffening tube . 前記アングル材の一辺が前記平鋼に直交するように前記補剛管の外周面に接合され、前記アングル材の前記平鋼に直交する側の辺を他の辺より長く設定したことを特徴とする請求項１記載のブレース材。Characterized in that one side of the front Symbol angle member is joined to the outer peripheral surface of the stiffening tube to be perpendicular to the flat bar, and the side edges perpendicular to the flat bar of the angle member is set to be longer than the other side The brace material according to claim 1, wherein 断面十字形の軸力材と、該軸力材が対角配置で隙間を設けて挿入される角形の補剛管と、該補剛管の外周面に接合された前記補剛管の補剛用のアングル材とを備え、An axial force member having a cross-shaped cross section, a rectangular stiffening tube into which the axial force member is inserted with a gap provided in a diagonal arrangement, and stiffening of the stiffening tube joined to an outer peripheral surface of the stiffening tube Angle material for
前記軸力材は前記補剛管に座屈が阻まれることを特徴とするブレース材。  A brace member, wherein the axial force member prevents buckling of the stiffening tube.
JP04144998A 1998-02-24 1998-02-24 Brace material Expired - Fee Related JP3589279B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04144998A JP3589279B2 (en) 1998-02-24 1998-02-24 Brace material

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JP04144998A JP3589279B2 (en) 1998-02-24 1998-02-24 Brace material

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JP2003123399A Division JP2003328450A (en) 2003-04-28 2003-04-28 Brazing material

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JP3589279B2 true JP3589279B2 (en) 2004-11-17

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Publication number Priority date Publication date Assignee Title
KR20020068636A (en) * 2001-02-21 2002-08-28 허형만 Beam Pipe With Reinforcement

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