JP3708255B2

JP3708255B2 - Non-welded frame using high-frequency bending

Info

Publication number: JP3708255B2
Application number: JP28934796A
Authority: JP
Inventors: 章福田; 直秀林
Original assignee: Daiwa House Industry Co Ltd
Current assignee: Daiwa House Industry Co Ltd
Priority date: 1996-10-11
Filing date: 1996-10-11
Publication date: 2005-10-19
Anticipated expiration: 2016-10-11
Also published as: JPH10115001A

Description

【０００１】
【発明の属する技術分野】
この発明は、店舗，工場，倉庫等の各種建物の鉄骨架構に応用可能な高周波曲げ加工無溶接架構に関する。
【０００２】
【従来の技術】
従来、図７のように柱３１，３１間に、傾斜した梁３２を山形に架け渡した形状の鉄骨架構を構築する場合、各曲がり部分は溶接によって接合していた。すなわち、柱３１に梁３２の一部となるブラケット３２Ｃを溶接しておき、このブラケット３２Ｃに梁本体３２Ａ，３２Ｂを添え板３３と共にボルト接合していた。両側の梁３２，３２を互いに接合する箇所では、片方の梁３２の梁本体３２Ａに、もう片方の梁３２の一部となる短尺梁材３２Ｄを溶接しておき、この短尺梁材３２Ｄに梁本体３２Ｂを添え板３３と共にボルト接合していた。
【０００３】
【発明が解決しようとする課題】
しかし、このように溶接で接合する構成では、溶接品質の厳しい管理が必要で、手間が掛かり、また溶接治具も必要となり、コスト高になる。しかも、製作時間も長く掛かる。
【０００４】
この発明は、このような課題を解消し、溶接作業が要らず低コストで簡単に製作でき、十分な耐力を有する高周波曲げ加工利用無溶接架構を提供することを目的とする。
【０００５】
【課題を解決するための手段】
この発明の請求項１記載の高周波曲げ加工利用無溶接架構は、湾曲形状の形鋼製の曲げ材の両端に、添え板を介して形鋼製の直線材をボルト接合し、前記曲げ材は、高周波誘導加熱による増肉加工により、長さ方向の中間部分が両端部分よりも増肉されたものとしている。
この構成によると、前記曲げ材を介して直線材をボルト接合するため、柱と梁との接合部など、互いに曲げて接合する直線材同志を、添え板と共にボルト接合するだけで、無溶接で接合できる。曲げ材は増肉加工したものであるため、架構の曲がり部の耐力低下が防げる。曲げ材は、一般に曲げ加工に伴い外周側フランジ等の壁部が薄肉になるが、このように薄肉部分が生じることが、増肉加工で補え、元の肉厚を下回ることなく、曲げ部の外周部の肉厚を確保することができる。また、そのため、増肉率を大きくすれば、肉厚低下の問題を生じることなく、曲げ部の曲率半径を小さくすることができ、架構の設計の自由度が高められる。また、曲げ材は、中間部分を増肉したものであるため、全体が厚肉となったものを用いる場合と異なり、両端の厚みを直線材と同じ厚みとすることができる。そのため、添え板を重ねて直線材と曲げ材とを接合する箇所で段差が生じず、ライナ等の介在部材を必要とせずに、添え材のみを用いてボルト接合できる。さらに、湾曲形状の曲げ材を使用するため、従来の折曲形状に直線材を接合する場合と異なり、両直線材の間に力が連続的に変化して無理なく円滑に伝達ができ、一部に応力集中することがない。このことからも強度的に優れた架構となる。増肉加工や曲げ加工については、高周波誘導加熱を利用した加工技術が実用化されており、増肉率の調整も簡単に行え、必要耐力に応じた肉厚のものとして、耐力と経済性のバランスのとれたものとできる。このように、鉄骨架構を、無溶接で、簡単かつ低コストに製作でき、耐力にも優れたものとできる。
【０００６】
前記構成の無溶接架構において、前記曲げ材および直線材をＨ形鋼製とし、前記曲げ材を両フランジが内径側および外径側に位置する方向に湾曲させてもよい。
また、これらの構成の無溶接架構において、曲げ材の一端に接合された直線材が柱であり、他端に接合された直線材が梁であってもよい。この構成の場合、柱と屋根梁等となる梁との接合を、曲げ材を介して簡単にボルト接合できる。
さらに、これらの構成の架構において、前記曲げ材の両端に接合される直線材が、各々傾斜梁であってもよい。前記各傾斜梁は、例えば、屋根の棟部の両側の梁とされる。
【０００７】
また、この発明における請求項５記載の無溶接架構は、形鋼製の直線材の一端近傍に湾曲部を設け、前記直線材の前記一端に添え板を介して他の形鋼製の直線材をボルト接合したものである。前記湾曲部は、高周波誘導加熱による増肉加工により、この湾曲部の両側部分よりも増肉されたものとする。
この構成の場合も、前記の増肉加工された曲げ材を用いた無溶接加工と同様に、鉄骨架構を、無溶接で、簡単かつ低コストに製作でき、耐力にも優れたものとできる。また、直線材間のボルト接合箇所が少なくて済み、現場の工数が少なくなる。
【０００８】
この直線材の一端に湾曲部を設けた加工において、前記各直線材をＨ形鋼製とし、前記湾曲部を両フランジが内径側および外形側に位置する方向に湾曲させるようにしてもよい。
また、前記湾曲部を設けた直線材が柱であり、前記他の直線材が梁であってもよい。さらに、湾曲部を設けた直線材および前記他の直線材が、共に各々傾斜梁であってもよい。
【０００９】
【発明の実施の形態】
この発明の一実施形態を図１および図２と共に説明する。
図１はこの実施形態に係る高周波曲げ加工利用無溶接架構の正面図を示し、図２は同架構の要部拡大図を示す。この架構は、２本の柱１，１間に、中間部から両側に向けて下降傾斜する傾斜梁２を架け渡したものである。柱１はＨ形鋼製の直線材からなる。傾斜梁２は、その中間部を構成するＨ形鋼製の曲げ材２Ａと、両傾斜部を構成する同じくＨ形鋼製の直線材２Ｂ，２Ｂとに分離して形成されている。柱１の上端部と、傾斜梁２の直線材２Ｂの端部とは、Ｈ形鋼製の湾曲形状の曲げ材３を介して接合される。すなわち、曲げ材３の一端と、柱１の上端とは、図２のように互いのフランジ３ａ，１ａおよびウェブ３ｂ，１ｂを略突き合わせた状態で、フランジ３ａ，１ａ間、およびウェブ３ｂ，１ｂ間に添え板４を架けわたして重ね、添え板４からフランジ３ａ，１ａおよびウェブ３ｂ，１ｂに貫通させた高力ボルト等のボルト５で締め付けることにより接合される。曲げ材３の他の一端と、傾斜梁２の直線材２Ｂの一端も、同様に添え板４を介してボルト接合される。図示の例では、添え板４は、各フランジおよびウェブの片面のみに設けた例を示したが、各フランジの両面およびウェブの両面に添え板を設け、２面剪断の摩擦ボルト接合構造としても良い。
【００１０】
曲げ材３は、Ｈ形鋼製の鉄骨素材を用い、高周波誘導加熱により、その長さ方向の中間部分が両端部分よりも増肉された増肉部分３ｃとなるように加工する。この増肉加工の後に、両フランジ３ａ，３ａが内径側および外径側に位置する方向に湾曲加工する。傾斜梁２の中間部を構成する曲げ材２Ａも同様に加工する。
このように湾曲部を増肉加工することにより、曲げ加工による減肉を補って湾曲部の耐力低下を防止し、かつ応力集中の生じ易い曲げ部を耐力に優れたものとできる。また、ラーメン構造の架構とできる。このような増肉加工および曲げ加工は精度よく行うことができるので、曲げ材２Ａ，３の増肉加工されない両側部分へのボルト挿通孔の孔明け加工は、曲げ加工前の直線材の状態で行う。これにより加工作業の作業性を向上させることができる。なお、高周波加熱による増肉の度合いは、曲げ材２Ａ，３の曲げ角度の度合いに応じて決められる。これにより、増肉加工に要する経費と、曲げ材２Ａ，３に要求される耐力確保とのバランスを図ることができる。
【００１１】
傾斜梁２を構成する両直線材２Ｂ，２Ｂの他の端部と、中間部の曲げ材２Ａの両端部との接合も、柱１と曲げ材３との接合と同様に、添え板４を介して高力ボルト５で締め付けることにより行われる。このようにして、柱１と傾斜梁２とを組み合わせた形状の架構を、溶接作業によらずに簡単かつ低コストに構築でき、十分な耐力も持たせることができる。
【００１２】
図３および図４は、高周波曲げ加工利用無溶接架構の他の実施形態を示す。この実施形態は、図１および図２に示す実施形態における柱１、傾斜梁２を構成する各部材２Ａ，２Ｂ、および曲げ材３を角形鋼管としたものである。図３では、傾斜梁２の端部と柱１の上端部とを曲げ材３を介して接合した部分を破断して示している。この場合、柱１および曲げ材３の各端部を、添え板４と共に締め付け固定するボルトとしてワンサイドボルト６が使用される。このワンサイドボルト６は、図４のように添え板４のボルト挿通孔７から、柱１、傾斜梁２の各部材２Ａ，２Ｂ、曲げ材３のボルト挿通孔８に挿通し、一端側からの操作により他端で頭部６ａを拡径状態に塑性変形させて、拡径頭部６ａとナット９とで柱１、傾斜梁２の各部材２Ａ，２Ｂ、曲げ材３と添え板４とを締め付けるものである。曲げ材２Ａ，３の湾曲部を増肉加工することは、先の実施形態の場合と同様である。ここでは、角形鋼管を使用した場合を示したが、丸形鋼管を使用してもよい。
【００１３】
図５は、高周波曲げ加工利用無溶接架構のさらに他の実施形態を示す。この実施形態では、図１における柱１の上端部に、曲げ材３と同じ湾曲部１ｃを一体に形成すると共に、図１における傾斜梁２の一方の直線材２Ｂの一端部に曲げ材２Ａと同じ湾曲部２ｃを一体に形成し、この湾曲部２ｃを有する直線材２Ｂ１と他の直線材２Ｂとで山形の傾斜梁２を構成したものである。柱１の湾曲部１ｃや直線材２Ｂ１の湾曲部２ｃは、図１における曲げ材２Ａ，３と同様にして増肉加工および曲げ加工される。柱１および傾斜梁２を構成する各部材２Ｂ，２Ｂ１がＨ形鋼製であることや、湾曲部１ｃ，２ｃにおける曲げ加工で、両フランジ１ａ，２ａが内径側および外径側に位置する方向に湾曲させることなどは、図１の実施形態と同様である。この実施形態の場合、柱１や直線材２Ｂ１に湾曲部１ｃ，２ｃを一体に形成したため、ボルト接合する箇所がそれだけ少なくなり、架構の構築作業が一層簡単になる。なお、この架構において、柱１や、傾斜梁２の直線材２Ｂ，２Ｂ１に、図３のように角形鋼管を使用したり、さらに丸形鋼管や溝形鋼を使用してもよい。
【００１４】
なお、前記各実施形態は、各々梁２が山形に傾斜したものである場合につき説明したが、図１（Ａ）の例のように増肉加工の曲げ材３を用いる架構において、図６（Ａ）に示すように、梁２を両側の柱１，１間に水平に設け、あるいは図６（Ｂ）のように梁２を片方にのみ傾斜したものとしても良い。また、図５（Ａ）のように柱１の上端部に増肉加工の湾曲部１ｃを一体に形成した架構においても、図６（Ｃ）のように、梁２を両側の柱１，１間に水平に設け、あるいは図６（Ｄ）のように梁２を片方にのみ傾斜したものとしても良い。
これら図６（Ａ）〜（Ｄ）の構成の場合、曲げ材３や湾曲部１ｃの曲率半径を小さくすることが必要な場合があるが、曲げ加工に伴う曲げ材３や湾曲部１ｃの外周側フランジ等の部分の肉厚低下は増肉率の増加により補え、元の肉厚を下回ることなく、必要な肉厚が確保できる。このような増肉率の調整は、高周波誘導加熱による増肉方法によると、簡単に行える。
【００１５】
【発明の効果】
この発明の高周波曲げ加工利用無溶接架構は、湾曲形状の形鋼製の曲げ材の両端に、添え板を介して形鋼製の直線材をボルト接合し、前記曲げ材は、高周波誘導加熱による増肉加工により、長さ方向の中間部分が両端部分よりも増肉されたものとしたため、直線材間が屈曲した形状の架構を、無溶接で、簡単に、かつ低コストで製作でき、十分な耐力も持たせることができる。
この構成において、曲げ材の一端に接合された直線材を柱とし、他端に接合された直線材を梁とした場合は、柱と梁の接合を、曲げ材を介して簡単にボルト接合で行える。また、湾曲形状の曲げ材を介して接合されることから、梁から柱へと力が連続的に変化して無理なくスムースな伝達ができ、一部に応力が集中せず、このことからも強度的に優れた架構となる。
また、この構成において、前記曲げ材の両端に接合される直線材を、各々傾斜梁とした場合は、両柱間に傾斜梁を架け渡した形状の架構などを、ボルト接合により簡単に構築できる。
また、形鋼製の直線材の一端近傍に湾曲部を設け、前記直線材の前記一端に添え板を介して他の形鋼製の直線材をボルト接合し、前記湾曲部を高周波誘導加熱による増肉加工によりこの湾曲部の両側部分よりも増肉された架構とした場合は、屈曲形状の架構を、無溶接で、簡単に、かつ低コストで製作でき、十分な耐力も持たせることができるうえ、ボルト接合箇所も少なくて済む。
【図面の簡単な説明】
【図１】この発明の一実施形態に係る高周波曲げ加工利用無溶接架構の概略構成を示す正面図である。
【図２】（Ａ）は同架構の要部拡大図、（Ｂ）は同架構の横断面図である。
【図３】（Ａ）はこの発明の他の実施形態に係る高周波曲げ加工利用無溶接架構の要部を拡大して示す破断正面図、（Ｂ）は同架構の横断面図である。
【図４】同架構におけるワンサイドボルトによる締付部の断面図である。
【図５】この発明のさらに他の実施形態に係る高周波曲げ加工利用無溶接架構の概略構成を示す正面図である。
【図６】（Ａ）〜（Ｄ）は、各々この発明のさらに他の実施形態にかかる架構の正面図である。
【図７】従来例の正面図である。
【符号の説明】
１…柱（直線材）、１ａ…湾曲部、２…傾斜梁、２Ｂ，２Ｂ１…直線材、２ｃ…湾曲部、２Ａ，３…曲げ材、３ｃ…増肉部分、４…添え板、５…高力ボルト、６…ワンサイドボルト[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high frequency bending non-welded frame applicable to steel frames of various buildings such as stores, factories, and warehouses.
[0002]
[Prior art]
Conventionally, when a steel frame having a shape in which an inclined beam 32 is bridged in a mountain shape between columns 31 and 31 as shown in FIG. 7, each bent portion is joined by welding. That is, a bracket 32 C that is a part of the beam 32 is welded to the column 31, and the beam main bodies 32 A and 32 B are bolted together with the attachment plate 33 to the bracket 32 C. In a place where the beams 32 on both sides are joined to each other, a short beam member 32D which is a part of the other beam 32 is welded to the beam body 32A of the other beam 32, and the beam is connected to the short beam member 32D. The main body 32 B was bolted together with the attachment plate 33.
[0003]
[Problems to be solved by the invention]
However, in such a configuration in which joining is performed by welding, strict management of the welding quality is required, which takes time and requires a welding jig, resulting in high costs. Moreover, it takes a long time to produce.
[0004]
An object of the present invention is to solve such problems, and to provide a high-frequency bending-free welded frame that can be easily manufactured at a low cost without requiring a welding operation, and has sufficient strength.
[0005]
[Means for Solving the Problems]
The non-welded frame utilizing high-frequency bending according to claim 1 of the present invention is such that a straight member made of a section steel is bolted to both ends of a bending member made of a curved shape steel via a splicing plate, The intermediate portion in the length direction is thicker than both end portions by the thickening process by high frequency induction heating.
According to this configuration, since the straight material is bolted via the bending material, the straight material that is bent and joined to each other, such as the joint portion between the column and the beam, is bolted together with the accessory plate, without welding. Can be joined. Since the bending material is processed to increase the thickness, it is possible to prevent a decrease in the proof stress of the bending portion of the frame. In general, the bending material is thinned on the wall of the outer flange or the like with the bending process. However, such a thin part can be compensated for by the thickening process, and the bending part is not reduced below the original thickness. The thickness of the outer peripheral portion can be ensured. Therefore, if the thickness increase rate is increased, the radius of curvature of the bent portion can be reduced without causing the problem of thickness reduction, and the degree of freedom in designing the frame is increased. In addition, since the bending material has a thickened intermediate portion, the thickness at both ends can be made the same as that of the straight material, unlike the case where the whole is thick. Therefore, there is no step at the place where the linear plate and the bending material are joined by overlapping the attachment plates, and bolt joining can be performed using only the attachment material without requiring an interposition member such as a liner. In addition, since a curved bending material is used, the force continuously changes between the two straight materials and can be transmitted smoothly and smoothly, unlike the case of joining straight materials to the conventional bent shape. There is no stress concentration on the part. From this, the frame is excellent in strength. For thickening and bending, processing technology using high-frequency induction heating has been put into practical use, and the rate of increase in thickness can be easily adjusted. It can be balanced. As described above, the steel frame can be manufactured easily and at low cost without welding, and can have excellent proof stress.
[0006]
In the non-welded frame having the above-described configuration, the bending member and the straight member may be made of H-shaped steel, and the bending member may be bent in a direction in which both flanges are located on the inner diameter side and the outer diameter side.
Further, in the non-welded frame having these configurations, the linear material joined to one end of the bending material may be a column, and the linear material joined to the other end may be a beam. In the case of this configuration, it is possible to easily join the column and the beam to be a roof beam or the like via a bending material.
Further, in the frames having these configurations, the linear members joined to both ends of the bending material may be inclined beams. The inclined beams are, for example, beams on both sides of a roof ridge.
[0007]
According to the fifth aspect of the present invention, the welded frame according to claim 5 is provided with a curved portion in the vicinity of one end of the straight member made of shape steel, and another straight member made of shape steel via an attachment plate at the one end of the straight member. Are bolted together. It is assumed that the curved portion is thicker than both side portions of the curved portion by a thickening process by high frequency induction heating.
Also in this configuration, the steel frame can be manufactured easily and at low cost without welding and with excellent proof stress as in the case of non-welding using the bending material subjected to thickening. In addition, the number of bolt joints between the straight members is small, and the number of man-hours on site is reduced.
[0008]
In the processing in which a curved portion is provided at one end of the linear member, each linear member may be made of H-shaped steel, and the curved portion may be curved in a direction in which both flanges are located on the inner diameter side and the outer shape side.
Further, the linear member provided with the curved portion may be a column, and the other linear member may be a beam. Further, the linear member provided with the curved portion and the other linear member may both be inclined beams.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a front view of a non-welded frame using high-frequency bending according to this embodiment, and FIG. 2 shows an enlarged view of a main part of the frame. This frame is constructed by spanning an inclined beam 2 which is inclined downward from the middle part to both sides between two pillars 1 and 1. The column 1 is made of a straight material made of H-shaped steel. The inclined beam 2 is separately formed into an H-shaped steel bending material 2A constituting an intermediate portion thereof, and straight H-steel members 2B and 2B constituting both inclined portions. The upper end portion of the column 1 and the end portion of the linear member 2B of the inclined beam 2 are joined via a curved bending material 3 made of H-shaped steel. That is, one end of the bending material 3 and the upper end of the column 1 are in a state where the flanges 3a, 1a and the webs 3b, 1b are substantially abutted with each other as shown in FIG. 2, and between the flanges 3a, 1a and the webs 3b, 1b. The splicing plate 4 is placed between the splicing plates 4 and overlapped, and they are joined by tightening with bolts 5 such as high strength bolts penetrating from the splicing plate 4 to the flanges 3a, 1a and the webs 3b, 1b. Similarly, the other end of the bending material 3 and one end of the linear member 2B of the inclined beam 2 are bolted together via the accessory plate 4. In the illustrated example, the attachment plate 4 is provided only on one side of each flange and web. However, the attachment plate is provided on both sides of each flange and both sides of the web, and a two-side shear friction bolt joint structure is also provided. good.
[0010]
The bending material 3 is processed using a steel frame material made of H-shaped steel so that the intermediate portion in the length direction becomes a thickened portion 3c that is thicker than both end portions by high frequency induction heating. After this thickening process, both flanges 3a, 3a are curved in the direction where they are located on the inner diameter side and the outer diameter side. The bending material 2A constituting the intermediate part of the inclined beam 2 is processed in the same manner.
By thickening the curved portion in this way, it is possible to compensate for the thinning caused by bending to prevent a decrease in the proof stress of the curved portion, and to make the bent portion, which tends to cause stress concentration, excellent in proof stress. It can also be a frame with a ramen structure. Since such thickening and bending can be performed with high accuracy, the drilling of the bolt insertion holes to both sides of the bending materials 2A and 3 that are not thickened is performed in the state of the straight material before the bending. Do. Thereby, workability | operativity of a processing operation can be improved. In addition, the degree of thickness increase by high frequency heating is determined according to the degree of the bending angle of the bending materials 2A and 3. Thereby, it is possible to achieve a balance between the cost required for the thickening process and the securing of the proof stress required for the bending materials 2A and 3.
[0011]
In the same manner as the joining of the pillar 1 and the bending material 3, the other plate of the straight beams 2B and 2B constituting the inclined beam 2 and the both ends of the bending material 2A of the intermediate part are joined with the attachment plate 4 as well. It is carried out by tightening with high-strength bolts 5 through. In this way, a frame with a combination of the pillar 1 and the inclined beam 2 can be constructed easily and at low cost without depending on the welding operation, and sufficient strength can be provided.
[0012]
3 and 4 show another embodiment of a non-welded frame using high-frequency bending. In this embodiment, the pillar 1 in the embodiment shown in FIGS. 1 and 2, the members 2 A and 2 B constituting the inclined beam 2, and the bending material 3 are formed as square steel pipes. In FIG. 3, the part which joined the end part of the inclined beam 2 and the upper end part of the pillar 1 via the bending material 3 is fractured | ruptured. In this case, a one-side bolt 6 is used as a bolt that fastens and fixes each end of the column 1 and the bending material 3 together with the accessory plate 4. As shown in FIG. 4, the one-side bolt 6 is inserted from the bolt insertion hole 7 of the accessory plate 4 into the pillar 1, the members 2A and 2B of the inclined beam 2, and the bolt insertion hole 8 of the bending material 3, and from one end side. The other end of the head 6a is plastically deformed in an expanded state at the other end, and the expanded diameter head 6a and the nut 9 are used for the column 1, the members 2A and 2B of the inclined beam 2, the bending material 3 and the splicing plate 4, Is to tighten. Thickening the curved portions of the bending materials 2A and 3 is the same as in the previous embodiment. Here, although the case where the square steel pipe was used was shown, you may use a round steel pipe.
[0013]
FIG. 5 shows still another embodiment of a non-welded frame using high-frequency bending. In this embodiment, the same curved portion 1c as the bending material 3 is integrally formed at the upper end portion of the column 1 in FIG. 1, and the bending material 2A is formed at one end portion of one linear member 2B of the inclined beam 2 in FIG. The same curved portion 2c is integrally formed, and the angled beam 2 is composed of a linear member 2B1 having the curved portion 2c and another linear member 2B. The curved portion 1c of the column 1 and the curved portion 2c of the linear member 2B1 are subjected to thickening processing and bending processing in the same manner as the bending materials 2A and 3 in FIG. The direction in which both flanges 1a and 2a are located on the inner diameter side and the outer diameter side when the members 2B and 2B1 constituting the column 1 and the inclined beam 2 are made of H-shaped steel or by bending at the curved portions 1c and 2c. It is the same as in the embodiment of FIG. In the case of this embodiment, since the curved portions 1c and 2c are integrally formed on the column 1 and the linear member 2B1, the number of bolted portions is reduced, and the construction work of the frame is further simplified. In this frame, a square steel pipe as shown in FIG. 3 or a round steel pipe or a channel steel may be used for the pillar 1 and the linear members 2B and 2B1 of the inclined beam 2 as shown in FIG.
[0014]
In each of the embodiments described above, the beam 2 is inclined in a mountain shape. However, as shown in FIG. 1 (A), in the frame using the bending material 3 for thickening, FIG. As shown in A), the beam 2 may be provided horizontally between the pillars 1 and 1 on both sides, or the beam 2 may be inclined only to one side as shown in FIG. 6B. Also, in a frame in which a thickened curved portion 1c is integrally formed at the upper end of the column 1 as shown in FIG. 5A, the beam 2 is connected to the columns 1 and 1 on both sides as shown in FIG. It may be provided horizontally between them, or the beam 2 may be inclined only to one side as shown in FIG.
6 (A) to 6 (D), it may be necessary to reduce the radius of curvature of the bending material 3 and the bending portion 1c, but the outer periphery of the bending material 3 and the bending portion 1c accompanying the bending process may be required. A decrease in the thickness of the side flange or the like can be compensated by an increase in the rate of increase in thickness, and the necessary thickness can be ensured without lowering the original thickness. Such adjustment of the thickness increase rate can be easily performed by a method for increasing the thickness by high frequency induction heating.
[0015]
【The invention's effect】
In the non-welded frame using high-frequency bending according to the present invention, a straight member made of a section steel is bolted to both ends of a bent member made of a shaped steel with a bent shape via an attachment plate, and the bending material is obtained by high-frequency induction heating. By increasing the thickness, the lengthwise intermediate part is thicker than both ends, so it is possible to produce a frame with a bent shape between straight materials easily and inexpensively without welding. It can also have a strong proof stress.
In this configuration, when the straight material joined to one end of the bending material is a column and the straight material joined to the other end is a beam, the connection between the column and the beam can be easily bolted via the bending material. Yes. In addition, since it is joined via a bending material with a curved shape, the force continuously changes from the beam to the column, making it possible to transmit forcefully and smoothly, and stress is not concentrated in some areas. The frame is excellent in strength.
In addition, in this configuration, when the straight members joined to both ends of the bending material are respectively inclined beams, a frame having a shape in which the inclined beams are bridged between both columns can be easily constructed by bolt bonding. .
Further, a curved portion is provided in the vicinity of one end of the straight member made of shape steel, and another straight member made of shape steel is bolted to the one end of the straight member through a splicing plate, and the curved portion is subjected to high-frequency induction heating. If the frame is made thicker than both sides of the curved part by thickening, the bent frame can be manufactured easily and at low cost without welding, and sufficient strength can be provided. In addition, there are fewer bolt joints.
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic configuration of a non-welded frame utilizing high-frequency bending according to an embodiment of the present invention.
FIG. 2A is an enlarged view of a main part of the frame, and FIG. 2B is a cross-sectional view of the frame.
3A is a cutaway front view showing an enlarged main part of a non-welded frame using high-frequency bending according to another embodiment of the present invention, and FIG. 3B is a cross-sectional view of the frame.
FIG. 4 is a cross-sectional view of a tightening portion using a one-side bolt in the same frame.
FIG. 5 is a front view showing a schematic configuration of a non-welded frame utilizing high-frequency bending work according to still another embodiment of the present invention.
FIGS. 6A to 6D are front views of a frame according to still another embodiment of the present invention.
FIG. 7 is a front view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Column (linear material), 1a ... Curved part, 2 ... Inclined beam, 2B, 2B1 ... Linear material, 2c ... Curved part, 2A, 3 ... Bending material, 3c ... Thickening part, 4 ... Saddle plate, 5 ... High strength bolt, 6 ... One side bolt

Claims

湾曲形状の形鋼製の曲げ材の両端に、添え板を介して形鋼製の直線材をボルト接合し、前記曲げ材は、高周波誘導加熱による増肉加工により、長さ方向の中間部分が両端部分よりも増肉されたものとした高周波曲げ加工利用無溶接架構。A straight section made of shaped steel is bolted to both ends of a curved shaped steel made of bending steel via a splicing plate, and the bending material has an intermediate portion in the length direction by thickening by high frequency induction heating. Non-welded frame using high-frequency bending that is thicker than both ends.

前記曲げ材および直線材がＨ形鋼製のものであり、前記曲げ材は両フランジが内径側および外径側に位置する方向に湾曲させた請求項１記載の高周波曲げ加工利用無溶接架構。2. The non-welded frame utilizing high-frequency bending according to claim 1, wherein the bending material and the straight material are made of H-shaped steel, and the bending material is bent in a direction in which both flanges are located on the inner diameter side and the outer diameter side.

曲げ材の一端に接合された直線材が柱であり、他端に接合された直線材が梁である請求項１または請求項２記載の高周波曲げ加工利用無溶接架構。The non-welded frame utilizing high-frequency bending according to claim 1 or 2, wherein the straight member joined to one end of the bending member is a column and the straight member joined to the other end is a beam.

前記曲げ材の両端に接合される直線材が、各々傾斜梁である請求項１または請求項２記載の高周波曲げ加工利用無溶接架構。The non-welded frame using high-frequency bending according to claim 1 or 2, wherein each of the straight members joined to both ends of the bending member is an inclined beam.

形鋼製の直線材の一端近傍に湾曲部を設け、前記直線材の前記一端に添え板を介して他の形鋼製の直線材をボルト接合し、前記湾曲部は高周波誘導加熱による増肉加工によりこの湾曲部の両側部分よりも増肉されたものとした高周波曲げ加工利用無溶接架構。A curved portion is provided in the vicinity of one end of the straight member made of shape steel, and another straight member made of shape steel is bolted to the one end of the straight member via a splicing plate, and the curved portion is increased in thickness by high frequency induction heating. Non-welded frame using high-frequency bending that has been thickened by machining beyond both sides of this curved part.

前記各直線材がＨ形鋼製のものであり、前記湾曲部は両フランジが内径側および外形側に位置する方向に湾曲させた請求項５記載の高周波曲げ加工利用無溶接架構。6. The non-welded frame using high-frequency bending according to claim 5, wherein each of the straight members is made of H-shaped steel, and the bending portion is bent in a direction in which both flanges are positioned on the inner diameter side and the outer shape side.

前記湾曲部を設けた直線材が柱であり、前記他の直線材が梁である請求項５または請求項６記載の高周波曲げ加工利用無溶接架構。The non-welded frame using high-frequency bending according to claim 5 or 6, wherein the straight member provided with the curved portion is a column and the other straight member is a beam.

前記湾曲部を設けた直線材および前記他の直線材が各々傾斜梁である請求項５または請求項６記載の高周波曲げ加工利用無溶接架構。The non-welded frame utilizing high-frequency bending according to claim 5 or 6, wherein each of the straight member provided with the curved portion and the other straight member is an inclined beam.