JP2000336929A - Beam form structure and its formation method - Google Patents
Beam form structure and its formation methodInfo
- Publication number
- JP2000336929A JP2000336929A JP11148464A JP14846499A JP2000336929A JP 2000336929 A JP2000336929 A JP 2000336929A JP 11148464 A JP11148464 A JP 11148464A JP 14846499 A JP14846499 A JP 14846499A JP 2000336929 A JP2000336929 A JP 2000336929A
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- Prior art keywords
- beam form
- suspended
- steel
- steel material
- suspended steel
- 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.)
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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ＲＣ構造の建物
の梁を形成するために用いる梁型枠構造とその形成方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam formwork structure used for forming a beam of a building having an RC structure, and a method of forming the same.
【０００２】[0002]
【従来の技術】図５は従来の梁型枠構造を梁断面側から
見た状態の説明図、図６は従来の梁型枠構造を梁側面側
から見た状態の説明図である。これらの図において、１
０は梁型枠であり、梁型枠１０は、底板１２と、底板１
２の両方の縁部から上方に立ち上がている一対の側板１
４，１４とからなる。底板１２及び側板１４，１４は合
板からなり、断面略コ字状に、すなわち樋状に組まれ、
釘によって連結固定されている。2. Description of the Related Art FIG. 5 is an explanatory view of a conventional beam form structure viewed from a beam cross section, and FIG. 6 is an explanatory view of a conventional beam form structure viewed from a beam side. In these figures, 1
Reference numeral 0 denotes a beam form, and a beam form 10 includes a bottom plate 12 and a bottom plate 1.
2 and a pair of side plates 1 rising upward from both edges.
4,14. The bottom plate 12 and the side plates 14, 14 are made of plywood, and are assembled in a substantially U-shaped cross section, that is, in a gutter shape.
Connected and fixed by nails.
【０００３】梁型枠１０の中間よりやゝ上の高さ位置及
び底板１２の近傍高さ位置には、セパレータ１６，１６
が側板１４を貫通した状態で取り付けられている。ま
た、梁型枠１０の側板１４の外側には長手方向に沿って
複数本のパイプバタ材１８が取り付けられ、セパレータ
１６の端部及びパイプバタ材１８はフォームタイ２０に
よって固定されている。[0005] Separators 16, 16 are provided at a height position slightly above the middle of the beam form 10 and at a height position near the bottom plate 12.
Are attached so as to penetrate the side plate 14. A plurality of pipe butter members 18 are attached to the outside of the side plate 14 of the beam formwork 10 along the longitudinal direction, and the ends of the separator 16 and the pipe butter members 18 are fixed by foam ties 20.
【０００４】梁型枠１０の内部には鉄筋を折曲形成して
なる籠状の鉄筋構造体２２が設けられ、梁型枠１０と鉄
筋構造体２２との間にはスペーサ（図示せず）が取り付
けられている。梁型枠１０の底部で、側板１４の直下位
置付近には一対のバタ角２４が梁型枠１０の長手方向に
沿って取り付けられ、バタ角２４の下にはバタ角２６が
所定間隔をおいてバタ角２４と直角に取り付けられてい
る。そして、梁型枠１０はバタ角２４，２６を介して多
数の支保工２８によって下方から支持されている。A cage-shaped reinforcing bar structure 22 formed by bending a reinforcing bar is provided inside the beam formwork 10, and a spacer (not shown) is provided between the beam formwork 10 and the reinforcing structure 22. Is attached. At the bottom of the beam form 10, near the position directly below the side plate 14, a pair of flutter angles 24 are attached along the longitudinal direction of the beam form 10, and below the flutter angle 24, a flutter angle 26 is formed at a predetermined interval. And is mounted at right angles to the flap angle 24. The beam formwork 10 is supported from below by a large number of supports 28 via butter angles 24 and 26.
【０００５】次に、上述した従来の梁型枠構造の形成方
法について説明する。Next, a method of forming the above-described conventional beam form structure will be described.
【０００６】まず、ベニヤ合板を躯体図により切断して
梁型枠１０の底板１２及び側板１４，１４を形成し、ま
た、所定の太さの桟木を用意し、底板１２、側板１４，
１４及び桟木等を樋状に組み、釘で固定して梁型枠１０
を形成する。[0006] First, the veneer plywood is cut in accordance with the skeleton drawing to form the bottom plate 12 and the side plates 14 and 14 of the beam formwork 10. Also, a pier having a predetermined thickness is prepared, and the bottom plate 12, the side plates 14 and 14 are prepared.
14 and piers are assembled in a gutter shape, fixed with nails, and
To form
【０００７】ベニヤ合板は、許容曲げ応力度が８０ｋｇ
ｆ／ｃｍ2 、ヤング係数が２０×１０3 ｋｇｆ／ｃｍ2
程度、桟木等は、圧縮強度が１５０ｋｇｆ／ｃｍ2 、引
張り・曲げが強度１９０ｋｇｆ／ｃｍ2 、剪断強度が１
６ｋｇｆ／ｃｍ2 程度のものを使用する。The veneer plywood has an allowable bending stress of 80 kg.
f / cm 2 , Young's modulus is 20 × 10 3 kgf / cm 2
The compression strength of the pier, etc. is 150 kgf / cm 2 , the tensile / bending strength is 190 kgf / cm 2 , and the shear strength is 1
Use a material of about 6 kgf / cm 2 .
【０００８】梁型枠１０の底板１２、側板１４，１４及
び桟木等は釘で固定しているが、釘に集中荷重がかかれ
ば、すぐに抜けたり、曲がったりするため、梁型枠１０
の側板１４にセパ孔を開け、セパレータ１６、フォーム
タイ２０及びパイプバタ材１８を使用して、梁型枠１０
が変形しないよう補強する。そして、梁型枠１０の底部
にバタ角２４，２６を取り付ける。The bottom plate 12, the side plates 14, 14 and the crosspiece of the beam formwork 10 are fixed with nails. However, if a concentrated load is applied to the nails, the nails can easily come off or bend.
A separator hole is formed in the side plate 14 of the beam form 10 using the separator 16, the foam tie 20 and the pipe flap material 18.
To prevent deformation. Then, butter angles 24 and 26 are attached to the bottom of the beam formwork 10.
【０００９】次に、梁型枠１０をクレーンで上の階の高
さまで吊り上げ、梁型枠１０の下に必要な本数の支保工
２８を入れ、梁型枠１０を下からサポートする。そし
て、梁型枠１０の上縁の高さ位置にデッキプレート３０
を敷き込み、固定する。Next, the beam form 10 is lifted up to the height of the upper floor by a crane, the required number of supports 28 are placed under the beam form 10, and the beam form 10 is supported from below. The deck plate 30 is located at the height of the upper edge of the beam formwork 10.
Spread and fix.
【００１０】次に、デッキプレート３０の上に梁筋を揚
重する。また、梁型枠１０の底にスペーサを設置し、梁
型枠１０の上で梁筋を組み立て、梁筋の側部にスペーサ
を取り付ける。そして、梁型枠１０の内側に梁筋を落と
し込み、梁筋同志を針金で結束する。Next, beam beams are lifted on the deck plate 30. Further, a spacer is installed on the bottom of the beam formwork 10, a beam reinforcement is assembled on the beam formwork 10, and the spacer is attached to a side portion of the beam reinforcement. Then, the beam reinforcement is dropped into the inside of the beam formwork 10, and the beam reinforcement is bound with a wire.
【００１１】[0011]
【発明が解決しようとする課題】ところで、従来の梁型
枠構造は、現場でこれを形成する場合、鉄筋を一度施工
フロアーまで揚重し、梁型枠１０上で組み立て、梁型枠
１０の内部に落とし込まなければならないので、鉄筋の
組み立てが高所作業になり、非常に危険であるという問
題があった。By the way, when the conventional beam formwork structure is formed on site, the reinforcing bar is once lifted to the construction floor, assembled on the beam formwork 10, and the beam formwork 10 is formed. Since it has to be dropped inside, assembling the rebar becomes a high place work, and there is a problem that it is very dangerous.
【００１２】また、従来の梁型枠構造は、現場でこれを
形成する場合、梁型枠１０を多数の支保工２８で支えな
ければならないので、支保工２８を設置するための手間
がかかり、しかも、支保工２８を設置している階では別
の作業を行なうことができず、工期を短縮させることが
できないという問題があった。In the conventional beam formwork structure, when forming the beam formwork on site, the beam formwork 10 must be supported by a large number of supports 28, so that it takes time and effort to install the supports 28. In addition, there is a problem that another work cannot be performed on the floor where the shoring 28 is installed, and the construction period cannot be shortened.
【００１３】この発明はこのような問題を解決して、梁
を低コストで速やかに形成することができる梁型枠構造
とその形成方法を提供することを目的とする。An object of the present invention is to solve such a problem and to provide a beam form structure capable of quickly forming a beam at low cost and a method of forming the same.
【００１４】[0014]
【課題を解決するための手段】この発明に係る梁型枠構
造は、断面略コ字状の薄鋼板製梁型枠と、該梁型枠の内
側の空間に該梁型枠に対して平行に設けられている籠状
の鉄筋構造体と、前記梁型枠の各側面部に該側面部の長
手方向に沿って各々取り付けられている一対の第一吊り
鋼材と、該一対の第一吊り鋼材に架け渡された状態で連
結されている複数本の第二吊り鋼材と、該複数本の第二
吊り鋼材の両端部付近を下方から各々支持している複数
本の支保工とを備えたものである。A beam formwork structure according to the present invention comprises a beam form made of a thin steel sheet having a substantially U-shaped cross section, and a beam form parallel to the beam form in a space inside the beam form. , A pair of first suspended steel members respectively attached to each side portion of the beam form along a longitudinal direction of the side portion, and the pair of first suspended portions A plurality of second suspended steel members connected in a state of being bridged over the steel material, and a plurality of shoring members each supporting the vicinity of both ends of the plurality of second suspended steel members from below. Things.
【００１５】また、この発明に係る梁型枠構造の形成方
法は、断面略コ字状の薄鋼板製梁型枠を形成する工程
と、該梁型枠の各側面部に一対の第一吊り鋼材を該側面
部の長手方向に沿って各々取り付ける工程と、該梁型枠
の内側の空間内に籠状の鉄筋構造体を該梁型枠に対して
平行に設ける工程と、該一対の第一吊り鋼材に複数本の
第二吊り鋼材を架け渡された状態で連結する工程と、該
梁型枠をクレーンで持ち上げる工程と、該複数本の第二
吊り鋼材の両端部付近に下方から支保工を取り付ける工
程とを備えたものである。Further, a method of forming a beam form structure according to the present invention includes a step of forming a beam form made of a thin steel plate having a substantially U-shaped cross section, and a pair of first suspensions on each side surface of the beam form. Attaching a steel material along the longitudinal direction of the side surface portion, providing a cage-shaped reinforcing steel structure in a space inside the beam form in parallel with the beam form; A step of connecting a plurality of second suspended steel members in a state of being bridged over one suspended steel member, a step of lifting the beam formwork with a crane, and supporting from below the vicinity of both ends of the plurality of second suspended steel members. And a step of attaching a work.
【００１６】上記梁型枠及びその形成方法において、前
記第一吊り鋼材は前記梁型枠の側面部の外側の上縁付近
に取り付けられていることが好ましいが、第二吊り鋼材
との連結が可能であれば上縁より下方位置に取り付けて
もよい。また、前記第一吊り鋼材、前記第二吊り鋼材と
してはみぞ形鋼又は角鋼管を使用することができる。ま
た、前記鉄筋構造体は前記吊り鋼材に吊り下げられてい
てもよい。また、上記形成方法において、各工程は上記
の順通りでなく、矛盾しない範囲で前後してもよい。In the beam formwork and the method of forming the same, the first suspended steel material is preferably mounted near an upper edge on the outside of the side surface of the beam formwork. If possible, it may be mounted below the upper edge. Further, as the first suspended steel material and the second suspended steel material, a channel steel or a square steel pipe can be used. Further, the rebar structure may be suspended from the suspended steel material. In addition, in the above-described forming method, each step may be performed in the order described above without being contradictory.
【００１７】[0017]
【発明の実施の形態】図１はこの発明の一実施の形態に
係る梁型枠構造を梁断面側から見た状態の説明図、図２
はこの発明の一実施の形態に係る梁型枠構造を梁側面側
から見た状態の説明図である。FIG. 1 is an explanatory view of a beam form structure according to an embodiment of the present invention as viewed from a beam cross section, FIG.
FIG. 1 is an explanatory diagram of a state where a beam formwork structure according to an embodiment of the present invention is viewed from a beam side surface.
【００１８】これらの図において、５０は断面略コ字状
の薄鋼板製梁型枠であり、梁型枠５０は底面部５２と、
底面部５２の両側縁から上方に延設されてなる一対の側
面部５４，５４とからなる。梁型枠５０は底面部５２＋
側面部５４のパーツと側面部５４のみのパーツからな
り、ビス及びボルト・ナットで組み立てられている。梁
型枠５０の内側でコーナー部及び底部には補強材５６が
取り付けられている。なお、補強材５６は梁型枠５０の
外側に取り付けてもよい。In these figures, reference numeral 50 denotes a beam form made of a thin steel plate having a substantially U-shaped cross section.
It comprises a pair of side portions 54, 54 extending upward from both side edges of the bottom portion 52. Beam formwork 50 has bottom part 52+
It is composed of parts of the side part 54 and parts of only the side part 54, and is assembled with screws, bolts and nuts. Reinforcing members 56 are attached to the corners and the bottom inside the beam formwork 50. The reinforcing member 56 may be attached to the outside of the beam form 50.
【００１９】梁型枠５０の側面部５４の外側の上縁付近
には一対の長尺な第一吊り鋼材５８がボルト・ナットに
よって各々取り付けられている。第一吊り鋼材５８は断
面コ字状のみぞ形鋼からなる。第一吊り鋼材５８には複
数本の第二吊り鋼材６０が架け渡された状態でボルト・
ナットによって連結されている。第二吊り鋼材６０も断
面コ字状のみぞ形鋼からなる。A pair of long first suspended steel members 58 are attached by bolts and nuts, respectively, near the upper edge of the outer side of the side surface portion 54 of the beam formwork 50. The first suspended steel material 58 is made of a U-shaped groove steel. A plurality of second suspended steel members 60 are stretched over the first suspended steel member 58 and bolts and
They are connected by nuts. The second suspended steel material 60 is also made of a U-shaped groove steel.
【００２０】梁型枠１０の内側の空間には籠状の鉄筋構
造体６２が梁型枠５０に対して平行に設けられている。
鉄筋構造体６２は主筋６４とスターラップ筋６６とから
なる。鉄筋構造体６２はスペーサ６８を介して第二吊り
鋼材６０に吊り下げられている。また、梁型枠５０と鉄
筋構造体６２との間にはスペーサ７０，７２が挿入され
ている。第二吊り鋼材６０の両端部付近は下方から複数
本の支保工７４によって各々支持されている。In the space inside the beam form 10, a cage-shaped reinforcing bar structure 62 is provided in parallel with the beam form 50.
The reinforcing bar structure 62 includes a main bar 64 and a stirrup bar 66. The reinforcing bar structure 62 is suspended from the second suspended steel material 60 via the spacer 68. Further, spacers 70 and 72 are inserted between the beam formwork 50 and the reinforcing bar structure 62. The vicinity of both ends of the second suspended steel material 60 is supported by a plurality of supports 74 from below, respectively.
【００２１】次に、この梁型枠構造の組み立て方法の一
例を、図３及び図４を参照しながら説明する。Next, an example of an assembling method of the beam form structure will be described with reference to FIGS.
【００２２】まず、工場からキットで出荷された、分割
状態の薄鋼板製梁型枠のパーツを、地上で、ビス及びボ
ルトにて組み立て、断面略コ字状の梁型枠５０を形成す
る。そして、梁型枠５０の側面部の外側で、上縁に第一
吊り鋼材５８，５８を各々取り付ける。First, the parts of the beam form made of thin steel plate in a divided state, which are shipped from the factory as a kit, are assembled on the ground with screws and bolts to form a beam form 50 having a substantially U-shaped cross section. Then, first suspended steel members 58, 58 are attached to the upper edge outside the side surface of the beam formwork 50, respectively.
【００２３】次に、梁筋を地上で組み、この梁筋を梁型
枠５０内に落し込む。そして、第一吊り鋼材５８に複数
本の第二吊り鋼材６０を架け渡した状態で連結する。Next, the beam reinforcement is assembled on the ground, and the beam reinforcement is dropped into the beam formwork 50. Then, a plurality of second suspended steel members 60 are connected to the first suspended steel member 58 in a state of being bridged.
【００２４】次に、梁型枠５０をクレーンで上の階の高
さ位置まで持ち上げ、第二吊り鋼材６０の両端部付近に
下方から複数本の支保工７４を設置する。そして、梁型
枠５０内の梁筋同志を針金で結束する。Next, the beam formwork 50 is lifted up to the height of the upper floor by a crane, and a plurality of supports 74 are installed from below in the vicinity of both ends of the second suspended steel material 60. Then, the beam bars in the beam formwork 50 are bound together with a wire.
【００２５】[0025]
【発明の効果】この発明によれば、梁型枠と鉄筋との一
体化の作業を地上で行なえるので、安全かつ迅速に梁施
工ができるという効果がある。According to the present invention, since the work of integrating the beam formwork and the rebar can be performed on the ground, there is an effect that the beam can be safely and quickly constructed.
【００２６】また、この発明によれば、セパレータやパ
イプバタ等は全く使用せず、サポート数も大幅に減らす
ことが可能となり、解体の工数が大幅に削減できること
と、下の階の現場を広く有効に利用できるという効果が
ある。Further, according to the present invention, the number of supports can be greatly reduced without using any separator or pipe flap, and the number of man-hours for disassembly can be significantly reduced. There is an effect that can be used.
【００２７】また、この発明によれば、鋼板型枠は強度
が強く、工場で製作できるので、現場での加工がほとん
ど無くなり、梁施工の安全性、施工能率が高くなるとい
う効果がある。Further, according to the present invention, since the steel plate form has high strength and can be manufactured in a factory, there is an effect that there is almost no processing on site, and the safety and efficiency of beam construction are enhanced.
【図１】この発明の一実施の形態に係る梁型枠構造の要
部を梁断面側から見た状態の説明図である。FIG. 1 is an explanatory diagram of a main part of a beam formwork structure according to an embodiment of the present invention as viewed from a beam cross-section side.
【図２】この発明の一実施の形態に係る梁型枠構造の要
部を梁側面側から見た状態の説明図である。FIG. 2 is an explanatory view of a main part of the beam formwork structure according to the embodiment of the present invention, as viewed from a beam side surface side.
【図３】この発明の一実施の形態に係る梁型枠構造を梁
断面側から見た状態の説明図である。FIG. 3 is an explanatory view of a state in which the beam formwork structure according to the embodiment of the present invention is viewed from the beam cross-section side.
【図４】この発明の一実施の形態に係る梁型枠構造を梁
側面側から見た状態の説明図である。FIG. 4 is an explanatory view of the beam formwork structure according to the embodiment of the present invention as viewed from the side of the beam.
【図５】従来の梁型枠構造を梁断面側から見た状態の説
明図である。FIG. 5 is an explanatory diagram of a state in which a conventional beam form structure is viewed from a beam cross-section side.
【図６】従来の梁型枠構造を梁側面側から見た状態の説
明図である。FIG. 6 is an explanatory view of a state in which a conventional beam form structure is viewed from a beam side surface side.
５０ 梁型枠 ５２ 底面部 ５４ 側面部 ５６ 補強材 ５８ 第一吊り鋼材 ６０ 第二釣り鋼材 ６２ 鉄筋構造体 ６４ 主筋 ６６ スターラップ筋 ６８ スペーサ ７０ スペーサ ７２ スペーサ ７４ 支保工 Reference Signs List 50 beam form 52 bottom part 54 side part 56 reinforcing material 58 first suspended steel material 60 second fishing steel material 62 steel bar structure 64 main bar 66 stirrup bar 68 spacer 70 spacer 72 spacer 74 support
Claims (8)
型枠の内側の空間に該梁型枠に対して平行に設けられて
いる籠状の鉄筋構造体と、前記梁型枠の各側面部に該側
面部の長手方向に沿って各々取り付けられている一対の
第一吊り鋼材と、該一対の第一吊り鋼材に架け渡された
状態で連結されている複数本の第二吊り鋼材と、該複数
本の第二吊り鋼材の両端部付近を下方から各々支持して
いる複数本の支保工とを備えたことを特徴とする梁型枠
構造。1. A beam form made of a thin steel plate having a substantially U-shaped cross section, a cage-like reinforcing structure provided in a space inside the beam form in parallel with the beam form, and A pair of first suspended steel members each attached to each side surface portion of the beam form along the longitudinal direction of the side surface portion, and a plurality of first suspended steel members connected to the pair of first suspended steel materials while being bridged over the pair of first suspended steel materials A beam formwork structure, comprising: a second suspended steel material; and a plurality of supports that respectively support both ends of the plurality of second suspended steel materials from below.
の外側の上縁付近に取り付けられていることを特徴とす
る請求項１に記載の梁型枠構造。2. The beam formwork structure according to claim 1, wherein the first suspended steel material is attached near an upper edge outside a side surface of the beam formwork.
みぞ形鋼又は角鋼管からなることを特徴とする請求項１
又は２に記載の梁型枠構造。3. The steel material according to claim 1, wherein the first suspended steel material and the second suspended steel material are formed of a channel steel or a square steel pipe.
Or the beam formwork structure according to 2.
り下げられていることを特徴とする請求項１〜３のいず
れかに記載の梁型枠構造。4. The beam formwork structure according to claim 1, wherein the reinforcing steel structure is suspended from the second suspended steel material.
る工程と、該梁型枠の各側面部に一対の第一吊り鋼材を
該側面部の長手方向に沿って各々取り付ける工程と、該
梁型枠の内側の空間内に籠状の鉄筋構造体を該梁型枠に
対して平行に設ける工程と、該一対の第一吊り鋼材に複
数本の第二吊り鋼材を架け渡された状態で連結する工程
と、該梁型枠をクレーンで持ち上げる工程と、該複数本
の第二吊り鋼材の両端部付近に下方から支保工を取り付
ける工程とを備えたことを特徴とする梁型枠構造の形成
方法。5. A step of forming a beam form made of a thin steel plate having a substantially U-shaped cross section, and attaching a pair of first suspended steel members to each side of the beam form along the longitudinal direction of the side. A step of providing a cage-shaped reinforcing steel structure in a space inside the beam form in parallel with the beam form; and suspending a plurality of second suspended steel members on the pair of first suspended steel members. The method includes a step of connecting in a handed state, a step of lifting the beam form by a crane, and a step of attaching a shoring from below in the vicinity of both ends of the plurality of second suspended steel materials. A method for forming a beam formwork structure.
の外側の上縁付近に取り付けられていることを特徴とす
る請求項５に記載の梁型枠構造の形成方法。6. The method according to claim 5, wherein the first suspended steel material is attached near an upper edge outside a side surface of the beam formwork.
みぞ形鋼又は角鋼管からなることを特徴とする請求項５
又は６に記載の梁型枠構造の形成方法。7. The steel structure according to claim 5, wherein the first suspended steel material and the second suspended steel material are formed of a channel steel or a square steel pipe.
Or the method for forming a beam form structure according to 6.
り下げられていることを特徴とする請求項５〜７のいず
れかに記載の梁型枠構造の形成方法。8. The method according to claim 5, wherein the rebar structure is suspended from the second suspended steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14846499A JP3200813B2 (en) | 1999-05-27 | 1999-05-27 | Beam formwork structure and its forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14846499A JP3200813B2 (en) | 1999-05-27 | 1999-05-27 | Beam formwork structure and its forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000336929A true JP2000336929A (en) | 2000-12-05 |
| JP3200813B2 JP3200813B2 (en) | 2001-08-20 |
Family
ID=15453345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14846499A Expired - Fee Related JP3200813B2 (en) | 1999-05-27 | 1999-05-27 | Beam formwork structure and its forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3200813B2 (en) |
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