JP7307321B2

JP7307321B2 - Method for manufacturing welded base member, steel plate joint, and method for manufacturing steel plate joint

Info

Publication number: JP7307321B2
Application number: JP2019089984A
Authority: JP
Inventors: 欽也石田; 真二児玉
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2023-07-12
Anticipated expiration: 2039-05-10
Also published as: JP2020185574A

Description

本発明は、溶接ベース部材の製造方法、この溶接ベース部材を用いた鋼板製継手及び鋼板製継手の製造方法に関する。 The present invention relates to a method for manufacturing a welded base member, a steel plate joint using the welded base member, and a method for manufacturing a steel plate joint.

従来、例えば、住宅等における建築用部材として、溝形鋼やリップ溝形鋼といった鋼板製部材の軽量形鋼が溶接によって組み合わされた、Ｔ字型の鋼板製継手が知られている。また、鋼板製継手を構成する鋼板製部材には、耐食性向上のため、亜鉛系めっきが施された鋼板（亜鉛系めっき鋼板）が使用されることが多い。 2. Description of the Related Art Conventionally, T-shaped steel plate joints are known, for example, as building members for houses and the like, in which light steel steel members such as channel steel and lip channel steel are combined by welding. In addition, a steel plate plated with zinc (zinc-plated steel plate) is often used for the steel plate member constituting the steel plate joint in order to improve corrosion resistance.

以下、「亜鉛系めっき層」とは、亜鉛（Ｚｎ）を主たる成分として含むめっき層として説明する。また、亜鉛系めっき層に含まれる成分としては、Ｚｎのみに限定されず、例えば、アルミニウム（Ａｌ）、マグネシウム（Ｍｇ）、シリコン（Ｓｉ）等が、鋼板製部材の耐食性を高めるための副成分として、適宜含まれてもよい。また、亜鉛系めっき層に含まれる金属元素は、２種類以上の合金であってもよい。 Hereinafter, the “zinc-based plating layer” is described as a plating layer containing zinc (Zn) as a main component. In addition, the component contained in the zinc-based plating layer is not limited to Zn alone. For example, aluminum (Al), magnesium (Mg), silicon (Si), etc. are subcomponents for enhancing the corrosion resistance of the steel plate member. may be included as appropriate. Also, the metal elements contained in the zinc-based plating layer may be an alloy of two or more types.

亜鉛系めっき鋼板同士、或いは、亜鉛系めっき鋼板と亜鉛系めっきが施されていない鋼板とを、例えばアーク溶接によって接合する際、熱によって亜鉛系めっきが気化し、めっき蒸気が発生する。発生しためっき蒸気が溶融中の溶接金属に残留すると、凝固した溶接金属に、空孔が形成される場合がある。こうした空孔のうち、溶接金属の表面に開口することなく内部にそのまま存在し、外部から観察できない空孔は「ブローホール」と呼ばれる。また、溶接金属の表面に開口し、外部から観察可能な空孔は、例えば「ピット」等と呼ばれる。 When zinc-based plated steel sheets or a zinc-based plated steel sheet and a non-zinc-plated steel sheet are joined, for example, by arc welding, the zinc-based plating is vaporized by heat to generate plating vapor. If the generated plating vapor remains in the molten weld metal, voids may be formed in the solidified weld metal. Among these pores, those that do not open on the surface of the weld metal but remain inside the weld metal and cannot be observed from the outside are called "blowholes." In addition, pores that are open on the surface of the weld metal and can be observed from the outside are called, for example, "pits" or the like.

溶接金属の空孔は、溶接継手の強度、剛性及び美観を損なうため、気孔欠陥とも呼ばれる。気孔欠陥の対策として、例えば、一定の溶接金属長さに占める、ブローホールの長さの和の比率（ブローホール率）を、３０％以下等、設定された基準値に応じて抑制するように溶接することが、好ましいとされる。また、溶接金属の単位長さあたりのピットの個数を制限する方法も存在する。 Porosity in the weld metal is also referred to as porosity defect because it impairs the strength, stiffness and aesthetics of the weld joint. As a countermeasure against pore defects, for example, the ratio of the sum of blowhole lengths (blowhole ratio) to a certain weld metal length is suppressed according to a set reference value, such as 30% or less. Welding is preferred. There are also methods of limiting the number of pits per unit length of weld metal.

Ｔ字型の鋼板製継手を製造する際の気孔欠陥の発生を抑制する方法として、特許文献１には、横部材及び縦部材からなる２個の母材の間に隙間を設けて溶接する技術が開示されている。横部材は、Ｔ字の横棒に相当する長尺部材であり、縦部材は、Ｔ字の縦棒に相当する長尺部材である。特許文献１の横部材及び縦部材は、亜鉛系めっきが施された溝形鋼であり、縦部材の端部には高さ約１ｍｍの突起が形成される。突起は、縦部材の端部の一部に対して、半抜きせん断加工や圧縮塑性変形加工が施されることによって、外側に点状に突出して形成される。 As a method for suppressing the occurrence of pore defects when manufacturing a T-shaped steel plate joint, Patent Document 1 discloses a technique of welding with a gap between two base materials consisting of a horizontal member and a vertical member. is disclosed. The horizontal member is a long member corresponding to a T-shaped horizontal bar, and the vertical member is a long member corresponding to a T-shaped vertical bar. The horizontal members and vertical members of Patent Document 1 are channel steel plated with zinc, and projections having a height of about 1 mm are formed at the ends of the vertical members. The protrusions are formed by subjecting part of the end portion of the longitudinal member to half-blanking shearing or compressive plastic deformation so as to protrude outward in a dot shape.

そして、特許文献１では、縦部材の突起が横部材の板面に突き当てられて、２個の溝形鋼の間に約１ｍｍの高さの隙間が形成され、この隙間が形成された状態で溶接が行われることによって、隙間からめっき蒸気が放散される。このため、特許文献１では、めっき蒸気の溶接金属中への侵入が抑制されると共に、仮に侵入しても侵入量が軽減されることによって、継手のブローホール率を抑制できるとされている。 In Patent Document 1, the projection of the vertical member is abutted against the plate surface of the horizontal member to form a gap with a height of about 1 mm between two channel steels, and the state in which this gap is formed Plating vapor is diffused from the gap by performing welding at . Therefore, in Patent Document 1, it is said that the penetration of the plating vapor into the weld metal is suppressed, and even if it penetrates, the amount of penetration is reduced, so that the blowhole rate of the joint can be suppressed.

特開２０１４－１１３６４１号公報JP 2014-113641 A

以下、Ｔ字の横棒に相当する部材（横部材）を「溶接ベース部材」、Ｔ字の縦棒に相当する部材（縦部材）を「立て部材」とそれぞれ称する。ここで、本発明者らは、立て部材として、３ｍｍ未満の薄い板厚の鋼板を用意し、この鋼板の端部に特許文献１の加工方法を用いて点状の突起を作製したところ、加工部から亀裂が生じたり加工部が打ち抜かれて脱落したりといった状態が生じた。すなわち、比較的薄い板厚の鋼板製部材に対しては、特許文献１の技術では、隙間を形成するための点状の突起を安定的に作製することが困難であり、気孔欠陥の発生を十分に抑制できない場合があるという問題がある。 Hereinafter, a member (horizontal member) corresponding to a T-shaped horizontal bar is referred to as a "welding base member", and a member (vertical member) corresponding to a T-shaped vertical bar is referred to as a "vertical member". Here, the present inventors prepared a thin steel plate with a thickness of less than 3 mm as a vertical member, and produced point-like projections on the end of this steel plate using the processing method of Patent Document 1. A crack was generated from the part, and the processed part was punched out and fell off. That is, with the technique of Patent Document 1, it is difficult to stably produce point-like projections for forming gaps for steel plate members having a relatively thin plate thickness, and the occurrence of pore defects is prevented. There is a problem that it may not be sufficiently suppressed.

また、気孔欠陥の発生の抑制以外についても、Ｔ字型の鋼板製継手の溶接ベース部材には、曲げ強度や引張強度等に加えて高い剛性が求められる場合がある。例えば、鋼板製継手が建築用部材等であって、溶接ベース部材が梁として使用される場合、梁の上に載置される屋根等の荷重に対する大きな耐力、及び、撓みや捻じり等の変形に対する大きな耐力を具備することが求められる。しかし、こうした剛性を向上する技術に関し、特許文献１には何ら開示されていない。 In addition to suppressing the occurrence of pore defects, the weld base member of the T-shaped steel plate joint may be required to have high rigidity in addition to bending strength, tensile strength, and the like. For example, if the steel plate joint is a building member or the like and the welded base member is used as a beam, the large resistance to the load of the roof placed on the beam, and deformation such as bending and twisting It is required to have a large resistance to However, Patent Document 1 does not disclose any technology for improving such rigidity.

本発明は、上記の問題に鑑み、亜鉛系めっきが施されたＴ字型の鋼板製継手の気孔欠陥の発生を抑制しつつ、更に、剛性を向上させた溶接ベース部材、及びこの溶接ベース部材を用いた鋼板製継手を提供することを目的とする。また、本発明は、亜鉛系めっきが施されたＴ字型の鋼板製継手に用いられる溶接ベース部材であって隙間形成用の突起を安定的に作製できる溶接ベース部材の製造方法、及びこの溶接ベース部材を用いた鋼板製継手の製造方法を提供することを目的とする。 In view of the above problems, the present invention provides a welded base member that suppresses the occurrence of pore defects in a zinc-plated T-shaped steel plate joint and further improves rigidity, and the welded base member. The object is to provide a steel plate joint using Further, the present invention provides a method for manufacturing a weld base member used for a T-shaped steel plate joint to which zinc-based plating is applied, in which projections for forming gaps can be stably produced, and the welding. An object of the present invention is to provide a method of manufacturing a steel plate joint using a base member.

本発明の第１の態様に係る鋼板製継手は、鋼板製の本体、本体の一方の板面上で本体の長手方向全体に亘って延びると共に一方の板面から測った高さが本体の厚み以下の線状突起、及び、本体の他方の板面上に線状突起に対応して形成された線状凹溝を有する溶接ベース部材と、端面が線状突起と対向するように、溶接ベース部材の一方の板面上に配置された鋼板製の立て部材と、溶接ベース部材及び立て部材のうち少なくとも一方の表面を被覆して設けられた亜鉛系めっき層と、溶接ベース部材と立て部材とを接合する溶接金属と、を備える。 A steel plate joint according to a first aspect of the present invention includes a steel plate main body, which extends along the entire longitudinal direction of the main body on one plate surface of the main body, and the height measured from the one plate surface is the thickness of the main body. The welding base member having the following linear projections and linear concave grooves formed corresponding to the linear projections on the other plate surface of the main body, and the welding base so that the end face faces the linear projections A standing member made of a steel plate arranged on one plate surface of the member; a zinc-based plating layer provided to cover the surface of at least one of the welding base member and the standing member; the welding base member and the standing member; and a weld metal that joins the

第１の態様では、線状突起によって溶接ベース部材と立て部材との間に隙間が形成されるため、溶接時に生じる亜鉛系めっき層の蒸気は、隙間から放散され、溶接金属の内部への残留が抑制される、このため、蒸気に起因する溶接金属の気孔欠陥の発生が抑制される。 In the first aspect, since the gap is formed between the welding base member and the standing member by the linear projections, the vapor of the zinc-based plating layer generated during welding is diffused from the gap and remains inside the weld metal. is suppressed, and therefore the occurrence of porosity defects in the weld metal caused by steam is suppressed.

また、線状突起が溶接ベース部材の長手方向全体に亘って設けられていることによって、溶接ベース部材の断面二次モーメントが増加する。このため、溶接ベース部材の板面上に線状突起が設けられておらず、板面が平板状である場合と比べ、曲げ強度や引張強度に加えて剛性を向上でき、撓みや捻じり等に起因する変形を抑制できる。 In addition, since the linear projection is provided over the entire longitudinal direction of the weld base member, the geometrical moment of inertia of the weld base member increases. For this reason, linear projections are not provided on the plate surface of the weld base member, and in addition to bending strength and tensile strength, rigidity can be improved compared to the case where the plate surface is flat, and bending, twisting, etc. can be improved. Deformation due to can be suppressed.

更に、線状突起の高さが、本体の厚み以下である。ここで、線状突起の高さが本体の厚みを超える場合、溶接ベース部材の剛性向上効果が飽和し、線状突起の作製の負担に対して得られる効果が小さくなる。このため、線状突起の高さが本体の厚み以下であることによって、溶接ベース部材の剛性を効率的に向上できる。 Furthermore, the height of the linear protrusions is less than or equal to the thickness of the main body. Here, when the height of the linear projection exceeds the thickness of the main body, the effect of improving the rigidity of the weld base member is saturated, and the effect obtained with respect to the burden of manufacturing the linear projection becomes small. Therefore, the rigidity of the weld base member can be efficiently improved by setting the height of the linear projection to be equal to or less than the thickness of the main body.

本発明の第２の態様に係る溶接ベース部材は、鋼板製の本体と、本体の一方の板面上で本体の長手方向全体に亘って延びると共に一方の板面から測った高さが本体の厚み以下の線状突起と、本体の他方の板面上に線状突起に対応して形成された線状凹溝と、を有する。 A welded base member according to a second aspect of the present invention includes a main body made of a steel plate, and a plate surface of the main body that extends along the entire longitudinal direction of the main body and has a height measured from the one plate surface of the main body. It has linear projections having a thickness equal to or less than the thickness and linear grooves formed corresponding to the linear projections on the other plate surface of the main body.

第２の態様では、亜鉛系めっきが施されたＴ字型の鋼板製継手の気孔欠陥の発生を抑制しつつ、更に、剛性を向上させた溶接ベース部材を実現できる。 In the second aspect, it is possible to realize a welded base member with enhanced rigidity while suppressing the occurrence of pore defects in a zinc-based T-shaped steel plate joint.

本発明の第３の態様に係る溶接ベース部材の製造方法は、鋼板製部材の本体の一方の板面上で本体の長手方向全体に亘って延びると共に一方の板面から測った高さが本体の厚み以下の線状突起を形成するように、本体の鋼板の領域の一部を、他方の板面側から一方の板面側に向かって本体から線状に押し出す工程を含む。 In a method for manufacturing a welded base member according to a third aspect of the present invention, the height measured from the one plate surface of the main body of the steel plate member extends along the entire longitudinal direction of the main body. part of the steel plate region of the main body is linearly extruded from the main body from the other plate surface side toward the one plate surface side so as to form linear projections having a thickness of

第３の態様では、溶接ベース部材の板面が線状に押し出されるため、立て部材の端面を点状に加工する場合と比べ、隙間形成用の突起を安定的に作製できる。 In the third aspect, since the plate surface of the weld base member is linearly extruded, compared with the case where the end surface of the upright member is processed into a point shape, the protrusions for forming the gap can be produced stably.

本発明の第４の態様に係る鋼板製継手の製造方法は、鋼板製の本体、本体の一方の板面上で本体の長手方向全体に亘って延びると共に一方の板面から測った高さが本体の厚み以下の線状突起、及び、本体の他方の板面上に線状突起に対応して形成された線状凹溝を有する溶接ベース部材、並びに、鋼板製の立て部材を用意する工程であって、溶接ベース部材及び立て部材のうち少なくとも一方の表面に亜鉛系めっき層が被覆された溶接ベース部材及び立て部材を用意する工程と、立て部材の端面が線状突起と対向するように立て部材を溶接ベース部材の板面の上に配置して、溶接ベース部材と立て部材との間に隙間を形成する工程と、溶接ベース部材と立て部材とを溶接する工程と、を含む。 A method for manufacturing a steel plate joint according to a fourth aspect of the present invention includes a main body made of a steel plate, extending over the entire longitudinal direction of the main body on one plate surface of the main body, and having a height measured from the one plate surface of the main body. A step of preparing a welding base member having linear projections having a thickness equal to or less than the thickness of the main body and linear grooves formed corresponding to the linear projections on the other plate surface of the main body, and a standing member made of steel plate. A step of preparing a welding base member and a standing member in which at least one surface of the welding base member and the standing member is coated with a zinc-based plating layer; The method includes placing the standing member on the plate surface of the welding base member to form a gap between the welding base member and the standing member, and welding the welding base member and the standing member.

第４の態様では、亜鉛系めっきが施されたＴ字型の鋼板製継手の気孔欠陥の発生を抑制しつつ、更に、溶接ベース部材の剛性が向上された鋼板製継手を製造できる。 In the fourth aspect, it is possible to manufacture a steel plate joint in which the rigidity of the weld base member is improved while suppressing the occurrence of porosity defects in the zinc-based T-shaped steel plate joint.

本発明によれば、亜鉛系めっきが施されたＴ字型の鋼板製継手の気孔欠陥の発生を抑制しつつ、更に、剛性を向上させた溶接ベース部材、及びこの溶接ベース部材を用いた鋼板製継手を提供できる。また、本発明によれば、亜鉛系めっきが施されたＴ字型の鋼板製継手に用いられる溶接ベース部材であって隙間形成用の突起を安定的に作製できる溶接ベース部材の製造方法、及びこの溶接ベース部材を用いた鋼板製継手の製造方法を提供できる。 According to the present invention, a welding base member that suppresses the occurrence of porosity defects in a zinc-based T-shaped steel plate joint and further improves rigidity, and a steel plate using this welding base member We can provide fittings. Further, according to the present invention, there is provided a method for manufacturing a weld base member which is used for a T-shaped steel plate joint to which zinc-based plating is applied and which can stably produce protrusions for forming gaps, and A method for manufacturing a steel plate joint using this weld base member can be provided.

本発明の実施形態に係る溶接ベース部材の構成を説明する斜視図である。It is a perspective view explaining composition of a welding base member concerning an embodiment of the present invention. 本実施形態に係る溶接ベース部材の線状突起の構成を説明する正面図である。FIG. 4 is a front view for explaining the configuration of linear projections of the weld base member according to the present embodiment; 本実施形態に係る溶接ベース部材の板厚に対する高さの比と剛性との関係を説明するグラフ図である。FIG. 4 is a graph illustrating the relationship between the ratio of height to plate thickness and rigidity of the weld base member according to the present embodiment. 本実施形態に係る鋼板製継手の構成を説明する斜視図である。It is a perspective view explaining the structure of the steel joint which concerns on this embodiment. 本実施形態に係る溶接ベース部材の製造方法を（Ａ）→（Ｂ）→（Ｃ）の順に説明する正面図である。It is a front view explaining the manufacturing method of the welding base member which concerns on this embodiment in order of (A)->(B)->(C). 本実施形態に係る鋼板製継手の製造方法を説明する正面図である。It is a front view explaining the manufacturing method of the steel plate joint which concerns on this embodiment. 図７（Ａ）及び図７（Ｂ）は、本実施形態に係る鋼板製継手の製造方法をそれぞれ説明する、図６中の７－７線の位置に対応する断面図である。7(A) and 7(B) are cross-sectional views corresponding to the position of line 7-7 in FIG. 6, respectively, for explaining the method of manufacturing the steel plate joint according to the present embodiment. 線状突起の高さと溶接品質との関係を説明する図である。It is a figure explaining the relationship between the height of a linear projection, and welding quality. 図９（Ａ）は、本実施形態に係る鋼板製継手の溶接金属のＸ線透過画像であり、図９（Ｂ）は、比較例に係る鋼板製継手の溶接金属のＸ線透過画像である。FIG. 9A is an X-ray transmission image of the weld metal of the steel plate joint according to this embodiment, and FIG. 9B is an X-ray transmission image of the weld metal of the steel plate joint according to the comparative example. . 図１０（Ａ）～図１０（Ｃ）は、本実施形態の変形例に係る溶接ベース部材の構成をそれぞれ説明する正面図である。FIGS. 10(A) to 10(C) are front views respectively explaining the configurations of weld base members according to modifications of the present embodiment. 図１１（Ａ）及び図１１（Ｂ）は、本実施形態の変形例に係る溶接ベース部材の構成をそれぞれ説明する正面図である。FIGS. 11(A) and 11(B) are front views each explaining the configuration of a welded base member according to a modification of the present embodiment. 変形例に係る溶接ベース部材の線状突起の構成を説明する正面図である。It is a front view explaining the structure of the linear projection of the welding base member which concerns on a modification.

以下に本発明の実施形態を説明する。以下の図面の記載において、同一の部分及び類似の部分には、同一の符号又は類似の符号を付している。但し、図面における厚みと平面寸法との関係、各装置や各部材の厚みの比率等は現実のものとは異なる。したがって、具体的な厚みや寸法は以下の説明を参酌して判定すべきものである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれている。 Embodiments of the present invention are described below. In the following description of the drawings, identical or similar parts are given the same or similar reference numerals. However, the relationship between the thickness and the plane dimension in the drawings, the ratio of the thickness of each device and each member, etc. are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined with reference to the following description. In addition, there are portions with different dimensional relationships and ratios between the drawings.

＜溶接ベース部材の構造＞
まず、本実施形態に係る溶接ベース部材１０を、図１～図４を参照して説明する。溶接ベース部材１０は、Ｔ字型の鋼板製継手を構成する母材の一つであり、図１に示すように、本体１２と、線状突起１４と、亜鉛系めっき層と、線状凹溝１８とを有する。 <Structure of welding base member>
First, a welding base member 10 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG. The weld base member 10 is one of the base materials constituting a T-shaped steel plate joint, and as shown in FIG. grooves 18;

本体１２は、断面がＣ字状である鋼板製の溝形鋼であり、ウェブ１２Ａ及びフランジ１２Ｂを有する。ウェブ１２Ａ及びフランジ１２Ｂの厚みはほぼ等しい。本体１２は、図１中の左下側から右上側に向かって延びる長尺部材である。本実施形態では、本体１２の溝形鋼は、例えば帯鋼等、一枚の鋼板製部材をロールフォーミングすることによって、作製可能である。 The body 12 is a steel channel steel with a C-shaped cross section and has a web 12A and a flange 12B. The thickness of web 12A and flange 12B are approximately equal. The main body 12 is an elongated member extending from the lower left side toward the upper right side in FIG. In this embodiment, the channel steel of the main body 12 can be made by roll forming a single steel plate member, such as a steel strip.

亜鉛系めっき層は、本体１２の長手方向全体に亘って板面を被覆するように、例えば２０μｍ程度の厚みで塗膜されている。本実施形態では、亜鉛系めっき層の図示は省略する。立て部材２０の亜鉛系めっき層によって、溶接時にめっき蒸気が生じる。 The zinc-based plating layer is coated with a thickness of, for example, about 20 μm so as to cover the plate surface over the entire longitudinal direction of the main body 12 . In this embodiment, illustration of the zinc-based plating layer is omitted. The zinc-based plating layer of the standing member 20 generates plating vapor during welding.

次に、線状突起１４及び線状凹溝１８について具体的に説明する。線状突起１４は、溶接時に、溶接ベース部材１０と立て部材２０との間に、隙間Ｃ（図６参照。）を形成する。線状突起１４は、本体１２のＣ字の外側に突出するように、図１中のウェブ１２Ａの上側の板面上で本体１２の長手方向に沿って、長手方向全体に亘って延びている。また、線状凹溝１８は、図１中のウェブ１２Ａの下側の板面上に、線状突起１４に対応して形成されている。なお、本発明では、線状突起１４は、本体１２の表面上で長手方向全体に亘って設けられることは必須ではなく、少なくとも表面の接合部を含んで一定の長さで設けられればよい。 Next, the linear projections 14 and the linear grooves 18 will be specifically described. The linear projection 14 forms a gap C (see FIG. 6) between the welding base member 10 and the standing member 20 during welding. The linear protrusion 14 extends along the longitudinal direction of the main body 12 on the upper plate surface of the web 12A in FIG. . Further, the linear grooves 18 are formed corresponding to the linear protrusions 14 on the lower plate surface of the web 12A in FIG. In the present invention, it is not essential that the linear protrusions 14 are provided on the surface of the main body 12 over the entire lengthwise direction, and may be provided with a certain length including at least the joints on the surface.

本実施形態に係る線状突起１４及び線状凹溝１８は、ロールフォーミングやプレス加工等の押し出し加工によって、作製される。線状凹溝１８の深さＤは、作製時の押し出し量（突き出し量）に相当するため、図２に示すように、線状突起１４の高さＨと線状凹溝１８の深さＤとは、ほぼ等しい。高さＨは、一方の板面（図２中の上面）から上側に向かって測った長さである。このため、線状突起１４の部分の肉厚は、本体１２の厚みＴとほぼ等しい。なお、図２中では、見易さのため、本体１２の厚みＴに対する線状凹溝１８の高さＨ及び深さＤの割合は、実際と異なり大きく誇張して描かれている。また、後で説明する図５、図６及び図１２中でも同様に、本体１２の厚みＴに対する線状凹溝１８の高さＨ及び深さＤの割合は、大きく描かれている。 The linear projections 14 and the linear grooves 18 according to this embodiment are produced by extrusion such as roll forming or press working. Since the depth D of the linear groove 18 corresponds to the extrusion amount (protrusion amount) at the time of fabrication, as shown in FIG. is approximately equal to The height H is the length measured upward from one plate surface (upper surface in FIG. 2). Therefore, the thickness of the portion of the linear projection 14 is substantially equal to the thickness T of the main body 12 . In FIG. 2, the ratio of the height H and the depth D of the linear groove 18 to the thickness T of the main body 12 is greatly exaggerated for ease of viewing. Similarly, in FIGS. 5, 6 and 12, which will be described later, the ratio of the height H and depth D of the linear groove 18 to the thickness T of the main body 12 is drawn large.

図１に示したように、本実施形態では、２本の線状突起１４が、本体１２の中心軸Ａを挟んで平行に、対称的に離間配置されている。また、２本の線状突起１４は、中心軸Ａからほぼ同じ距離で離間している。中心軸Ａには、平面視で、溶接ベース部材１０の重心が重なる。なお、本発明では、線状突起１４の本数は、２本に限定されず、１本、或いは、３本以上の複数本であってよい。線状突起１４が少なくとも１本以上設けられれば、隙間Ｃを形成できる。 As shown in FIG. 1, in this embodiment, the two linear protrusions 14 are symmetrically spaced apart in parallel with the central axis A of the main body 12 interposed therebetween. Also, the two linear protrusions 14 are separated from the central axis A at substantially the same distance. The center of gravity of the welding base member 10 overlaps with the center axis A in plan view. In the present invention, the number of linear projections 14 is not limited to two, and may be one or a plurality of three or more. The gap C can be formed by providing at least one or more linear projections 14 .

ここで、本発明者らは、線状突起１４の高さＨの好適な上限値を設定するため、線状突起１４の高さＨを異ならせた溶接ベース部材を複数製造し、製造した溶接ベース部材のそれぞれの剛性を測定した。具体的には、長手方向の長さが約３００ｍｍ、幅方向（図２中の左右方向）の長さが約３０ｍｍ、厚みＴが約２．３ｍｍの溝形鋼を、線状突起１４を有さない溶接ベース部材として用意した。 Here, in order to set a suitable upper limit value for the height H of the linear projections 14, the present inventors manufactured a plurality of weld base members having different heights H of the linear projections 14, and manufactured welding The stiffness of each of the base members was measured. Specifically, channel steel having a longitudinal length of about 300 mm, a width direction (left and right direction in FIG. It was prepared as a weld base member that does not

そして、この溝形鋼の押し出し加工における押し出し量を５パターンに異ならせ、図１に示したように、ウェブ１２Ａに２本の線状突起１４を設けた溶接ベース部材１０をそれぞれ製造した。５パターンの溶接ベース部材１０の、本体１２の鋼板の厚みＴに対する高さＨの比Ｈ／Ｔは、０．２、０．４、０．６、０．８及び１．０である。また、線状突起１４を有さない溶接ベース部材は、ウェブ１２Ａが平板状であって、比Ｈ／Ｔ＝０である。 Then, the amount of extrusion in the extrusion process of the channel steel was changed into five patterns, and as shown in FIG. The ratios H/T of the height H to the thickness T of the steel plate of the body 12 of the five patterns of the weld base member 10 are 0.2, 0.4, 0.6, 0.8 and 1.0. In addition, the welded base member having no linear protrusion 14 has a flat web 12A and a ratio H/T=0.

そして、比Ｈ／Ｔ＝０の溶接ベース部材１０及び５パターンの溶接ベース部材１０に対して、剛性を測定するための３点曲げ試験を実施した。３点曲げ試験では、溶接ベース部材１０のウェブ１２Ａを、幅方向に２５０ｍｍの間隔（スパン）を設けた２点で下側から支持し、ウェブ１２Ａに上側から、支持位置の２点間の中央に荷重を載荷して、ウェブ１２Ａが破断する際の最大荷重を測定した。そして、比Ｈ／Ｔ＝０の溶接ベース部材で測定された最大荷重（曲げ強度）に対する、他の５パターンの溶接ベース部材１０のそれぞれの最大荷重の百分率を、図３中の縦軸の「強度」として算出した。すなわち、比Ｈ／Ｔ＝０の溶接ベース部材で測定された最大荷重が、１００％に相当する。 Then, a three-point bending test for measuring rigidity was performed on the welded base member 10 with the ratio H/T=0 and the welded base member 10 with five patterns. In the three-point bending test, the web 12A of the weld base member 10 was supported from below at two points with an interval (span) of 250 mm in the width direction. , and the maximum load at which the web 12A breaks was measured. Then, the percentage of the maximum load (bending strength) of each of the other five patterns of the weld base member 10 with respect to the maximum load (bending strength) measured on the weld base member with the ratio H / T = 0 is indicated on the vertical axis in FIG. strength”. That is, the maximum load measured on a welded base member with ratio H/T=0 corresponds to 100%.

図３に示すように、線状突起１４が設けられることによって、溶接ベース部材１０の強度は、比Ｈ／Ｔが約０．５辺りまでは、急峻に向上する。曲げ強度と剛性との間には相関があるため、曲げ強度が大きい程、溶接ベース部材１０の剛性は高まる。そして、比Ｈ／Ｔが約０．５を超える辺りから、曲げ強度（剛性）の向上の程度は、緩やかになる。そして、比Ｈ／Ｔが１．０、すなわち、線状突起１４の高さＨが鋼板の厚みＴと等しくなると、図３中の軌跡の傾きから分かるように、曲げ強度（剛性）がピークに達する。 As shown in FIG. 3, the strength of the weld base member 10 is sharply improved by providing the linear projections 14 until the ratio H/T is about 0.5. Since there is a correlation between bending strength and rigidity, the higher the bending strength, the higher the rigidity of the weld base member 10 . When the ratio H/T exceeds approximately 0.5, the degree of improvement in bending strength (rigidity) becomes moderate. Then, when the ratio H/T is 1.0, that is, when the height H of the linear projection 14 is equal to the thickness T of the steel plate, the bending strength (rigidity) peaks as can be seen from the slope of the locus in FIG. reach.

図３より、線状突起１４の高さＨが本体１２の厚みＴを超える場合、溶接ベース部材１０の剛性向上効果が飽和し、線状突起１４の作製負担に対して得られる効果が小さくなることが分かる。また、この測定結果とは別に、線状突起１４の高さＨが本体１２の厚みＴを超える場合、押し出し加工の際、線状凹溝１８の深さＤが本体１２の厚みＴを超えて深く押し出される。このため、線状突起１４の肉厚が大きく減少し、結果、溶接ベース部材１０の剛性が低下する懸念もある。このため、本実施形態では、線状突起１４の板面から測った高さＨは、本体１２の厚みＴ以下に設定されている。 3, when the height H of the linear projection 14 exceeds the thickness T of the main body 12, the effect of improving the rigidity of the weld base member 10 is saturated, and the effect obtained with respect to the production burden of the linear projection 14 becomes small. I understand. In addition to this measurement result, when the height H of the linear projection 14 exceeds the thickness T of the main body 12, the depth D of the linear groove 18 exceeds the thickness T of the main body 12 during extrusion. deeply pushed out. Therefore, there is a concern that the thickness of the linear projection 14 is greatly reduced, and as a result, the rigidity of the weld base member 10 is reduced. Therefore, in this embodiment, the height H measured from the plate surface of the linear projection 14 is set to be equal to or less than the thickness T of the main body 12 .

＜鋼板製継手の構造＞
次に、本実施形態に係る溶接ベース部材１０を用いた鋼板製継手を説明する。鋼板製継手１００は、図４に示すように、溶接ベース部材１０と、立て部材２０と、溶接金属３０と、を備える。 <Structure of steel plate joint>
Next, a steel plate joint using the welded base member 10 according to this embodiment will be described. The steel plate joint 100 includes a weld base member 10, an upright member 20, and a weld metal 30, as shown in FIG.

立て部材２０は、鋼板製の本体２２と、本体２２の板面を被覆するように塗膜された亜鉛系めっき層とを有する。本体２２は、断面がＣ字状である鋼板製の溝形鋼であり、図４中の下側から上側に向かって延びる長尺部材である。なお、図４中の立て部材２０の上下方向の高さ（長手方向の長さ）は例示であり、本発明では、立て部材２０の上下方向の高さは、適宜変更できる。本実施形態では、本体２２の溝形鋼は、溶接ベース部材１０と同様、一枚の鋼板製部材をロールフォーミングすることによって、作製可能である。 The standing member 20 has a main body 22 made of a steel plate and a zinc-based plating layer coated so as to cover the plate surface of the main body 22 . The main body 22 is a steel channel steel having a C-shaped cross section, and is an elongated member extending upward from the lower side in FIG. Note that the vertical height (longitudinal length) of the standing member 20 in FIG. 4 is an example, and in the present invention, the vertical height of the standing member 20 can be changed as appropriate. In this embodiment, the channel steel of the main body 22 can be made by roll forming a single steel plate member, similar to the welded base member 10 .

亜鉛系めっき層は、溶接ベース部材１０の亜鉛系めっき層と等価である。なお、本実施形態では、溶接ベース部材１０及び立て部材２０のそれぞれの板面上に、亜鉛系めっき層が塗膜されている場合が例示されたが、本発明では、これに限定されない。亜鉛系めっき層は、溶接ベース部材１０及び立て部材２０のうち少なくとも一方の表面を被覆して設けられればよい。また、溶接ベース部材１０と同様に、亜鉛系めっき層は、溶接対象領域である接合部にのみ限定的に設けられてもよい。 The zinc-based plating layer is equivalent to the zinc-based plating layer of the weld base member 10 . In the present embodiment, the plate surface of each of the welding base member 10 and the standing member 20 is coated with a zinc-based plating layer, but the present invention is not limited to this. The zinc-based plating layer may be provided by coating the surface of at least one of the welding base member 10 and the vertical member 20 . Also, like the weld base member 10, the zinc-based plating layer may be provided only limitedly on the joint portion, which is the area to be welded.

立て部材２０は、端面が、線状突起１４と対向するように線状突起１４に突き当てられた状態で、溶接ベース部材１０の一方の板面上に配置されている。すなわち、溶接の母材となる溶接ベース部材１０及び立て部材２０は、それぞれの面方向が平行でなく、交差するように配置され、板面どうしが重ならない。 The upright member 20 is arranged on one plate surface of the welding base member 10 in a state in which the end face is abutted against the linear projection 14 so as to face the linear projection 14 . That is, the welding base member 10 and the vertical member 20, which serve as base materials for welding, are arranged so that their plane directions are not parallel but cross each other, and the plate planes do not overlap each other.

また、図４中の鋼板製継手１００では、溶接ベース部材１０が下側で水平に延びるように配置されると共に、立て部材２０が上側で鉛直に延びるように配置された場合が例示されたが、本発明では、これに限定されない。例えば、溶接ベース部材１０が上側に配置されると共に、立て部材２０が下側に配置されてもよい。また、溶接ベース部材１０が鉛直に延びるように配置されると共に、立て部材２０が水平に延びるように配置されてもよい。すなわち、Ｔ字型の継手構造が実現される限り、溶接ベース部材１０及び立て部材２０の空間的な配置関係は任意に設定できる。 Further, in the steel plate joint 100 in FIG. 4, the welding base member 10 is arranged so as to extend horizontally on the lower side, and the standing member 20 is arranged so as to extend vertically on the upper side. , the present invention is not limited to this. For example, the welding base member 10 may be arranged on the upper side and the standing member 20 may be arranged on the lower side. Alternatively, the welding base member 10 may be arranged to extend vertically, and the standing member 20 may be arranged to extend horizontally. That is, as long as the T-shaped joint structure is realized, the spatial arrangement relationship between the welding base member 10 and the standing member 20 can be arbitrarily set.

溶接金属３０は、溶接時に用いる溶接ワイヤ等の溶接材料と母材の金属が溶融、混合し、この溶融金属が凝固して形成される。そして、溶接金属は溶接ベース部材１０と立て部材２０とを接合する。図４中に例示した、左上側から右下側に延びる棒状の溶接金属３０の場合、左上側が始端であり、右下側が終端である。溶接金属３０の終端には、クレーター処理が施されている。また、図４中では溶接ビードの盛り上がりが、波模様で例示されている。 The weld metal 30 is formed by melting and mixing a welding material such as a welding wire used for welding and a base material metal, and solidifying the molten metal. The weld metal then joins the weld base member 10 and the standing member 20 . In the case of the bar-shaped weld metal 30 extending from the upper left side to the lower right side illustrated in FIG. 4, the upper left side is the starting point and the lower right side is the terminal end. The end of the weld metal 30 is cratered. Further, in FIG. 4, the swelling of the weld bead is exemplified by a wave pattern.

（作用効果）
本実施形態では、溶接時、亜鉛系めっき層の蒸気は、線状突起１４によって形成された隙間Ｃから放散され、溶接金属３０の内部への残留が抑制されるため、蒸気に起因する溶接金属３０の気孔欠陥の発生が抑制される。 (Effect)
In this embodiment, during welding, the vapor of the zinc-based plating layer is diffused from the gaps C formed by the linear projections 14, and is suppressed from remaining inside the weld metal 30. 30 stomatal defects are suppressed.

また、本実施形態では、線状突起１４は、溶接ベース部材１０の他方の板面側から一方の板面側に向かって、本体１２から線状に押し出された鋼板の領域である。溶接ベース部材１０の板面を線状に押し出す加工が用いられるため、立て部材２０の端面を点状に加工する場合と比べ、線状突起１４を安定的に作製できる。 Further, in the present embodiment, the linear protrusion 14 is a region of a steel plate linearly extruded from the main body 12 from the other plate surface side of the weld base member 10 toward one plate surface side. Since the plate surface of the welding base member 10 is linearly extruded, the linear protrusions 14 can be stably produced compared to the case where the end surface of the standing member 20 is processed into a point shape.

また、線状突起１４が溶接ベース部材１０の長手方向全体に亘って設けられていることによって、溶接ベース部材１０の断面二次モーメントが増加する。このため、板面上に線状突起１４が設けられておらず、溶接ベース部材１０の板面が平板状である場合と比べ、曲げ強度や引張強度等の剛性を向上でき、撓みや捻じり等に起因する変形を抑制できる。 In addition, since the linear projections 14 are provided over the entire longitudinal direction of the weld base member 10, the geometrical moment of inertia of the weld base member 10 increases. Therefore, compared with the case where the plate surface of the weld base member 10 is flat without the linear protrusions 14, the rigidity such as bending strength and tensile strength can be improved, and bending and twisting can be prevented. It is possible to suppress deformation caused by, for example,

また、剛性の向上によって、例えば、線状突起１４を有さない溶接ベース部材と比較すると、許容たわみに対する耐荷重を増加することが可能になり、溶接ベース部材１０の信頼性が向上する。また、同じ耐荷重の場合、板厚低減によって部材質量を軽減することが可能になるため、材料費を抑制できる。 Further, the improved rigidity makes it possible to increase the load resistance against allowable deflection and improve the reliability of the welded base member 10 compared to, for example, a welded base member that does not have the linear protrusions 14 . In addition, in the case of the same withstand load, it is possible to reduce the member mass by reducing the plate thickness, so it is possible to suppress the material cost.

また、本実施形態では、線状突起１４が、溶接ベース部材１０の長手方向全体に亘って設けられている。このため、溶接の相手方となる立て部材２０の突き当て位置を問わず、線状突起１４上で任意の位置に立て部材２０を配置可能になるので、溶接ベース部材１０の汎用性が高く、部材の共通化を促進できる。また、例えば、建築現場における溶接時に、溶接ベース部材１０上での立て部材２０の溶接位置の変更が急遽生じても、立て部材２０の突き当て位置を変更するだけで済み、有利である。 Further, in the present embodiment, the linear projections 14 are provided along the entire longitudinal direction of the weld base member 10 . Therefore, regardless of the abutment position of the upright member 20 to be welded, the upright member 20 can be arranged at any position on the linear projection 14, so that the welding base member 10 has high versatility and can be used as a member. commonality can be promoted. Moreover, for example, even if the welding position of the upright member 20 on the welding base member 10 suddenly changes during welding at a construction site, it is only necessary to change the abutment position of the upright member 20, which is advantageous.

更に、図３に示したように、線状突起１４の高さＨが、剛性向上効果の飽和点と、肉厚減少による剛性低下の影響を考慮して、本体１２の厚みＴ以下に設定されているため、溶接ベース部材１０の剛性を効率的に向上できる。また、線状突起１４の高さＨが本体１２の厚みＴを超える場合、押し出し加工の際、線状凹溝１８の深さが本体１２の厚みＴを超えて深く押し出されるため、線状突起１４の肉厚が大きく減少し、結果、溶接ベース部材１０の剛性が低下する懸念もある。 Furthermore, as shown in FIG. 3, the height H of the linear projections 14 is set to be equal to or less than the thickness T of the main body 12 in consideration of the saturation point of the rigidity improvement effect and the influence of rigidity reduction due to reduction in thickness. Therefore, the rigidity of the weld base member 10 can be efficiently improved. Further, when the height H of the linear projection 14 exceeds the thickness T of the main body 12, the depth of the linear groove 18 exceeds the thickness T of the main body 12 and is extruded deeply during the extrusion process. 14 is greatly reduced, and as a result, there is also a concern that the rigidity of the weld base member 10 is lowered.

また、線状突起１４の高さＨが本体１２の厚みＴを超える場合、線状突起１４の作製の際、押し出し加工による歪みの影響が大きくなる。具体的には、溶接ベース部材１０の表面の線状突起１４の周囲において、微細なしわの発生や、亜鉛系めっき層の伸長に伴うめっき厚の減少等が懸念される。しわの発生やめっき厚の減少は、外観品質の低下や耐食性の低下を招く可能性がある。しかし、本実施形態では、線状突起１４の高さＨが本体１２の厚みＴ以下に制御されることによって、しわの発生やめっき厚の減少を抑制できる。 Further, when the height H of the linear projection 14 exceeds the thickness T of the main body 12, the influence of distortion due to extrusion processing increases when the linear projection 14 is produced. Specifically, around the linear projections 14 on the surface of the weld base member 10, there are concerns about the occurrence of fine wrinkles, the reduction of the coating thickness due to the elongation of the zinc-based coating layer, and the like. Occurrence of wrinkles and reduction of plating thickness may lead to deterioration of appearance quality and deterioration of corrosion resistance. However, in the present embodiment, by controlling the height H of the linear protrusions 14 to be equal to or less than the thickness T of the main body 12, it is possible to suppress the occurrence of wrinkles and the reduction of the plating thickness.

また、本実施形態では、線状突起１４が２本であるため、線状突起１４が１本の場合と比べ、溶接ベース部材１０の剛性を更に向上できる。 Further, in the present embodiment, since there are two linear projections 14, the rigidity of the weld base member 10 can be further improved compared to the case where the linear projection 14 is one.

また、本実施形態では、２本の線状突起１４が、本体１２の中心軸Ａを挟んで、対称的に離間配置されている。このため、例えば、２本の線状突起１４が、中心軸Ａを挟んだ両側のうち一方の領域に集約して配置されている場合と比べ、溶接ベース部材１０の全体の剛性をバランスよく向上できる。また、複数本の線状突起１４が中心軸Ａを挟んで対称的に離間配置される場合、線状突起１４の本数は、２本に限定されず、４本、６本等、他の偶数であってもよい。また、離間配置する線状突起１４の間隔が広い程、溶接ベース部材１０の剛性をより向上できる。 Moreover, in this embodiment, the two linear protrusions 14 are symmetrically spaced apart with the central axis A of the main body 12 interposed therebetween. For this reason, for example, compared to the case where two linear projections 14 are collectively arranged in one region of both sides across the central axis A, the rigidity of the entire welding base member 10 is improved in a well-balanced manner. can. Further, when a plurality of linear projections 14 are arranged symmetrically with respect to the central axis A, the number of the linear projections 14 is not limited to two, and may be any other even number such as four or six. may be Moreover, the rigidity of the weld base member 10 can be further improved as the space between the linear projections 14 is increased.

＜溶接ベース部材の製造方法＞
次に、本実施形態に係る溶接ベース部材１０の製造方法を説明する。まず、図５（Ａ）に示すように、一定の厚みＴを有する鋼板製部材１２Ｐを用意する。鋼板製部材１２Ｐは、溶接ベース部材１０の本体１２となる。 <Manufacturing method of welding base member>
Next, a method for manufacturing the weld base member 10 according to this embodiment will be described. First, as shown in FIG. 5A, a steel plate member 12P having a constant thickness T is prepared. The steel plate member 12</b>P becomes the main body 12 of the welded base member 10 .

次に、図５（Ｂ）に示すように、鋼板製部材１２Ｐを、ロールフォーミングラインに装入する。本実施形態では、一例として、ロールフォーミングラインの最前段に設けられたフォーミングロール４２の周面には、２本の突起部４４が、全周に亘って設けられている。突起部４４の突き出し高さは、本体１２の厚みＴ以下に設定されている。 Next, as shown in FIG. 5B, the steel plate member 12P is loaded into the roll forming line. In this embodiment, as an example, two protrusions 44 are provided along the entire circumference of the peripheral surface of the forming roll 42 provided at the frontmost stage of the roll forming line. The protrusion height of the protrusion 44 is set to be equal to or less than the thickness T of the main body 12 .

そして、移動する鋼板製部材１２Ｐに対し、フォーミングロール４２を接触させ、鋼板の領域の一部を、突起部４４の形状に応じて、上側の板面側から下側の板面側に向かって押し出す。このため、最前段を通過した鋼板製部材１２Ｐには、突起部４４を用いた押し出しによって、線状凹溝１８及び線状突起１４が、鋼板製部材１２Ｐの長手方向に沿って、長手方向全体に亘って延びるように作製される。また、線状突起１４の高さＨは、本体１２の厚みＴ以下である。なお、本実施形態では、線状突起１４の作製に際し、ロール段数が１段のフォーミングロール４２が使用された場合が例示されたが、本発明ではこれに限定されず、２段以上のロールが使用されてもよい。 Then, the forming roll 42 is brought into contact with the moving steel plate member 12P, and a part of the region of the steel plate is moved from the upper plate surface side toward the lower plate surface side according to the shape of the protrusion 44. Push out. For this reason, in the steel plate member 12P that has passed through the frontmost stage, the linear grooves 18 and the linear projections 14 are formed along the longitudinal direction of the steel plate member 12P by extrusion using the protrusions 44, and the entire length of the steel plate member 12P is extended. is made to extend across the Moreover, the height H of the linear projection 14 is equal to or less than the thickness T of the main body 12 . In the present embodiment, the case where the forming roll 42 having one roll stage is used for producing the linear protrusions 14 is exemplified, but the present invention is not limited to this, and a roll having two or more stages is used. may be used.

次に、線状突起１４が作製された鋼板製部材１２Ｐを、同じフォーミングライン中で最前段に後続する次段以降に進入させる。そして、図５（Ｃ）に示すように、ロールフォーミングによって、鋼板製部材１２Ｐの幅方向（図５（Ｃ）中の左右方向）の両端をそれぞれ上側に段階的に折り曲げて、ウェブ１２Ａ及びフランジ１２Ｂを有する溝形鋼を形成する。 Next, the steel plate member 12P having the linear projections 14 formed thereon is advanced to the next and subsequent stages following the foremost stage in the same forming line. Then, as shown in FIG. 5(C), by roll forming, both ends of the steel plate member 12P in the width direction (left and right direction in FIG. 5(C)) are bent stepwise upward to form the web 12A and the flanges. Form channel steel with 12B.

なお、ウェブ１２Ａ及びフランジ１２Ｂ作製時の折り曲げ加工に用いるフォーミングロールは、折り曲げ加工前に作製された線状突起１４に接触して線状突起１４を変形させないように調整される。具体的には、例えば、折り曲げ加工用のフォーミングロールの周面で線状突起１４に対応する領域に凹部等の退避場所を設け、加工中に周面が線状突起１４に接触しないように構成すればよい。 The forming rolls used for bending when fabricating the web 12A and the flanges 12B are adjusted so as not to come into contact with and deform the linear projections 14 produced before folding. Specifically, for example, a retraction place such as a recess is provided in a region corresponding to the linear projections 14 on the peripheral surface of the forming roll for bending, so that the peripheral surface does not contact the linear projections 14 during processing. do it.

次に、ロールフォーミングによって形成された溝形鋼を、例えばカットオフプレス等を用いて所定の長さで切断する。必要に応じて、切断時の位置決め用又は固定用の穴や切り欠き等を、鋼板製部材１２Ｐに予め設けておくことによって、効率的に切断できる。穴や切り欠き等は、打ち抜き加工やプレノッチ加工等によって実現できる。そして、溶接ベース部材１０の表面上の所定の領域に、必要に応じて亜鉛系めっき層を塗膜する。以上の工程によって、本実施形態に係る溶接ベース部材１０を得ることができる。 Next, the channel steel formed by roll forming is cut to a predetermined length using, for example, a cut-off press. Efficient cutting can be achieved by previously providing holes, notches, or the like for positioning or fixing at the time of cutting in the steel plate member 12P as required. Holes, cutouts, and the like can be realized by punching, pre-notching, and the like. Then, a zinc-based plating layer is applied to a predetermined region on the surface of the weld base member 10 as necessary. The welding base member 10 according to the present embodiment can be obtained through the above steps.

（作用効果）
本実施形態に係る溶接ベース部材１０の製造方法によれば、亜鉛系めっきが施されたＴ字型の鋼板製継手１００の気孔欠陥の発生を抑制しつつ、隙間形成用の突起を安定的に作製でき、更に、剛性を向上させた溶接ベース部材を製造できる。 (Effect)
According to the method for manufacturing the welded base member 10 according to the present embodiment, while suppressing the occurrence of pore defects in the zinc-plated T-shaped steel plate joint 100, the protrusions for forming the gap are stably formed. It is possible to produce a welded base member with improved rigidity.

また、本実施形態では、押し出し加工によって線状突起１４を一度に作製可能になるため、複数の点状の突起を一つ一つ個別に作製する場合と比べ、作業能率が高く、溶接ベース部材の大量生産に好適である。特に、鋼板製継手が、梯子形状や格子形状等、Ｔ字型の部分を複数有する場合に、本実施形態は有効である。 In addition, in this embodiment, since the linear projections 14 can be produced at once by extrusion, compared to the case of individually producing a plurality of point-like projections, the work efficiency is high, and the welding base member can be welded. It is suitable for mass production of In particular, this embodiment is effective when the steel plate joint has a plurality of T-shaped portions such as a ladder shape and a lattice shape.

また、本実施形態では、鋼板製部材１２Ｐを形鋼にロールフォーミングする際のフォーミングラインと同じフォーミングラインで、線状突起１４を作製する。一方、プレス等によって形鋼に突起を形成する場合、形鋼をロールフォーミング設備からプレス場等へ移動させる時間や手間が生じる。本実施形態では線状突起１４の作製に際し、形鋼を移動させる時間や手間を削減することが可能になるため、生産性が更に高まる。 Further, in the present embodiment, the linear projections 14 are produced on the same forming line as the forming line for roll forming the steel plate member 12P into a shaped steel. On the other hand, when forming projections on shaped steel by pressing or the like, it takes time and effort to move the shaped steel from roll forming equipment to a press field or the like. In the present embodiment, when the linear projections 14 are produced, it is possible to reduce the time and effort required to move the shaped steel, thereby further increasing productivity.

また、本実施形態では、線状突起１４の作製と形鋼へのロールフォーミングとの両方が、同じフォーミングラインで実行可能である。一方、プレス等によって突起を形成する場合、ロールフォーミング設備とは異なる、プレス等の専用の加工装置が別途必要になる。また、プレス用の金型の大型化や、或いは、金型の大型化を回避するため、鋼板製部材１２Ｐをプレス前に所定の長さに切断する手間が生じ得る。本実施形態では、線状突起１４の作製に際し、専用の加工装置が存在しない場合であっても、形鋼製造時のロールフォーミング設備をそのまま活用でき、加工装置を別途用意する必要がないため、新規の設備投資コストを抑えることができる。 Moreover, in this embodiment, both the production of the linear projections 14 and the roll forming of the shaped steel can be performed on the same forming line. On the other hand, when the protrusions are formed by a press or the like, a dedicated processing device such as a press, which is different from the roll forming equipment, is required. In addition, in order to avoid an increase in the size of the metal mold for pressing, or to avoid an increase in the size of the metal mold, it may be necessary to cut the steel plate member 12P to a predetermined length before pressing. In the present embodiment, even if there is no dedicated processing device for producing the linear projections 14, the roll forming equipment used in manufacturing the shaped steel can be used as it is, and there is no need to separately prepare a processing device. New facility investment costs can be suppressed.

なお、本発明では、線状突起１４を作製するための方法は、ロールフォーミングに限定されない。例えば、線状突起１４の形状に応じた上下の金型を用意し、この金型を用いた一般的なプレス装置によって、線状突起１４が作製されてもよい。 In addition, in the present invention, the method for producing the linear protrusions 14 is not limited to roll forming. For example, upper and lower molds corresponding to the shape of the linear projections 14 may be prepared, and the linear projections 14 may be produced by a general press machine using these molds.

また、プレス装置を用いた押し出し加工の場合、線状突起１４は、長手方向全体に亘って延びる必要はない。線状突起１４が板面上に部分的に配置されるように、立て部材２０との溶接位置に押し出し位置を限定することによって、加工負担を軽減してもよい。ただし、ロールフォーミング成形の方が、生産性が高い。 Moreover, in the case of extrusion using a pressing device, the linear protrusions 14 do not need to extend over the entire longitudinal direction. The processing burden may be reduced by limiting the extrusion position to the welding position with the standing member 20 so that the linear projection 14 is partially arranged on the plate surface. However, roll forming molding is more productive.

＜鋼板製継手の製造方法＞
次に、本実施形態に係る溶接ベース部材１０を用いた鋼板製継手１００の製造方法を説明する。まず、溶接ベース部材１０及び立て部材２０を用意する。溶接ベース部材１０及び立て部材２０のうち、少なくとも一方の表面には、亜鉛系めっき層が被覆される。 <Manufacturing method of steel plate joint>
Next, a method for manufacturing the steel plate joint 100 using the weld base member 10 according to this embodiment will be described. First, the welding base member 10 and the standing member 20 are prepared. At least one surface of the welding base member 10 and the standing member 20 is coated with a zinc-based plating layer.

次に、図６に示すように、立て部材２０の端面が線状突起１４と対向するように、立て部材２０を溶接ベース部材１０の板面の上に突き当てて配置し、溶接ベース部材１０と立て部材２０との間に隙間Ｃを形成する。 Next, as shown in FIG. 6, the upright member 20 is placed against the plate surface of the welding base member 10 so that the end surface of the upright member 20 faces the linear projection 14, and the welding base member 10 is and the upright member 20, a gap C is formed.

次に、図７（Ａ）に示すように、溶接ベース部材１０と立て部材２０とを溶接する。図７（Ａ）中には、溶接ワイヤ５０及び溶接トーチ５２を用いたアーク溶接が行われる場合が例示されている。溶接ワイヤ５０の先端は、ノズル５４の開口部から、溶接ベース部材１０と立て部材２０との接続部に向かって突き出される。ノズル５４の壁の内側ではシールドガスが流れる。例えば、マグ溶接の場合、シールドガスとして二酸化炭素（ＣＯ_２）、もしくはアルゴン（Ａｒ）とＣＯ_２などとの混合ガスを使用できる。溶接ワイヤ５０は、例えば銅合金製のコンタクトチップ５６によって給電される。溶接によって、図７（Ｂ）に示すように、コーナーに溶接金属３０が形成される。 Next, as shown in FIG. 7A, the welding base member 10 and the standing member 20 are welded. FIG. 7A illustrates a case where arc welding using a welding wire 50 and a welding torch 52 is performed. The tip of welding wire 50 protrudes from the opening of nozzle 54 toward the connecting portion between welding base member 10 and standing member 20 . Shielding gas flows inside the wall of the nozzle 54 . For example, in the case of MAG welding, carbon dioxide (CO ₂ ) or a mixed gas of argon (Ar) and CO ₂ can be used as the shielding gas. The welding wire 50 is powered by a contact tip 56 made of, for example, a copper alloy. By welding, a weld metal 30 is formed at the corner as shown in FIG. 7(B).

なお、溶接時には、線状突起１４の形状が溶接後に変形することなく溶接前の形状が保持されると共に、溶融中の溶接金属３０による立て部材２０ならび溶接ベース部材１０への溶け落ちや穴あき等が生じないよう、溶接条件が調整されることが好ましい。溶接条件は、例えば、立て部材２０を線状突起１４に突き当てる力や、溶接入熱等である。溶接入熱は、電流、電圧及び速度から得られる熱量であり、下記の式によって得られる。

溶接入熱（kＪ／cm）＝６０×電流（Ａ）×電圧（Ｖ）／速度(cm／min)／１０００

以上の工程によって、本実施形態に係る鋼板製継手１００を得ることができる。 During welding, the shape of the linear projection 14 is not deformed after welding, and the shape before welding is maintained. It is preferable that the welding conditions are adjusted so as not to cause such problems. The welding conditions are, for example, the force with which the standing member 20 is abutted against the linear protrusion 14, the welding heat input, and the like. Welding heat input is the amount of heat obtained from current, voltage and speed, and is obtained by the following formula.

Welding heat input (kJ/cm) = 60 x current (A) x voltage (V)/speed (cm/min)/1000

Through the steps described above, the steel plate joint 100 according to the present embodiment can be obtained.

（作用効果）
本実施形態に係る鋼板製継手１００の製造方法によれば、亜鉛系めっきが施されたＴ字型の鋼板製継手１００の気孔欠陥の発生を抑制しつつ、隙間形成用の突起を安定的に作製でき、更に、溶接ベース部材の剛性を向上できる。 (Effect)
According to the method for manufacturing the steel plate joint 100 according to the present embodiment, while suppressing the occurrence of pore defects in the zinc-plated T-shaped steel plate joint 100, the protrusions for forming the gap are stably formed. In addition, the rigidity of the weld base member can be improved.

次に、本発明の実施例に係る鋼板製継手を説明する。図８に示すように、実施例では、線状突起１４の高さＨが、０ｍｍから約１．０ｍｍまでの１１パターンの溶接ベース部材１０を用意し、それぞれの溶接ベース部材１０を用いて製造した鋼板製継手の溶接金属３０の溶接品質を確認した。 Next, a steel plate joint according to an embodiment of the present invention will be described. As shown in FIG. 8, in the embodiment, eleven patterns of welding base members 10 with a height H of linear projections 14 ranging from 0 mm to about 1.0 mm are prepared, and each welding base member 10 is used for manufacturing. The weld quality of the weld metal 30 of the joint made of steel plates was confirmed.

溶接ベース部材１０及び立て部材２０として、長手方向の長さが約３００ｍｍ、幅方向の長さが約１００ｍｍ、高さ方向の長さが約５０ｍｍ、厚みＴが約２．３ｍｍの溝形鋼を用いた。また、溶接ベース部材のウェブ１２Ａの板面上には、上記した「溶接ベース部材の製造方法」を用いて、断面が半円状の線状突起１４を、間隔４０ｍｍで２本作製した。 As the welding base member 10 and the vertical member 20, channel steel having a length in the longitudinal direction of about 300 mm, a length in the width direction of about 100 mm, a length in the height direction of about 50 mm, and a thickness T of about 2.3 mm was used. Using. Also, on the plate surface of the web 12A of the weld base member, two linear protrusions 14 having a semicircular cross section were formed at intervals of 40 mm using the above-described "Weld base member manufacturing method".

また、溶接ベース部材１０及び立て部材２０のそれぞれの鋼板の両面には、亜鉛系めっき層として、Ｚｎ－１１％、Ａｌ－３％、Ｍｇ－０．２％、Ｓｉ溶融めっきを、両面合計付着量２００ｇ／ｍ^２で被膜した。また、上記した「溶接ベース部材の製造方法」を用いて、溶接ベース部材１０及び立て部材２０を、図４に示したように隅肉溶接して、Ｔ字型の鋼板製継手を製造した。 In addition, Zn-11%, Al-3%, Mg-0.2%, and Si hot-dip plating are applied as zinc-based coating layers on both sides of the steel plates of the weld base member 10 and the standing member 20 in total on both sides. It was coated with an amount of 200 g/m ² . Also, using the above-described "method for manufacturing a welded base member", the welded base member 10 and the standing member 20 were fillet welded as shown in FIG. 4 to produce a T-shaped steel plate joint.

また、溶接条件は以下のとおりである。
溶接方法：ＤＣ－ＣＯ_２
溶接速度：４０ｃｍ／分
溶接ワイヤ：日鐵住金溶接工業製ＹＭ－２８ φ１．２ｍｍ
溶接姿勢：下向き水平
溶接トーチ角度：前進角及び後退角…０度、起こし角…４５度及び６０度の２種類
突き出し長さ：１５ｍｍ
ワイヤ先端狙い位置：コーナー（起こし角が４５度の場合）、及び
コーナーから溶接ベース部材側に０．５ｍｍ逃がし
（起こし角が６０度の場合）の２種類
溶接電流：約１４０Ａ
溶接電圧：約２３Ｖ Welding conditions are as follows.
Welding method: DC- _CO2
Welding speed: 40 cm/min Welding wire: YM-28 φ1.2 mm manufactured by Nippon Steel & Sumikin Welding Co., Ltd.
Welding posture: Downward horizontal Welding torch angle: Advance angle and retreat angle: 0 degrees Raising angle: 45 degrees and 60 degrees Projection length: 15mm
Wire tip target position: corner (when the raising angle is 45 degrees), and
Relieve 0.5mm from the corner to the welding base member side
Two types (when the raised angle is 60 degrees) Welding current: about 140A
Welding voltage: about 23V

そして、製造した鋼板製継手のそれぞれについて、溶接ビードの長さ方向中心の５０ｍｍの長さの領域に対し、気孔欠陥が占める部分の長さの割合を気孔欠陥率として算出した。結果、実施例では、隙間Ｃを形成する線状突起１４の高さＨが０．２ｍｍ以上の場合、気孔欠陥率が２０％以下であった。図８中では、０．２≦Ｈ≦１．０における溶接金属３０の溶接品質は、丸（〇）印で表されている。また、形成された溶接ビードのうち、溶接始終端を除いた、５０ｍｍ程度の範囲の定常部を、Ｘ線透過撮影した。図９（Ａ）に示すように、例えば、高さＨ＝０．３ｍｍの場合、溶接金属３０の内部には、僅かな気孔しか観察されず、溶接品質が良好であることが分かる。 Then, for each of the manufactured steel plate joints, the ratio of the length of the portion occupied by pore defects to the 50 mm length region at the center of the weld bead in the length direction was calculated as the pore defect rate. As a result, in the example, when the height H of the linear protrusions 14 forming the gap C was 0.2 mm or more, the pore defect rate was 20% or less. In FIG. 8, the weld quality of the weld metal 30 when 0.2≦H≦1.0 is indicated by a circle (◯). In addition, of the formed weld bead, a stationary portion of a range of about 50 mm, excluding the welding start and end, was photographed by X-ray transmission. As shown in FIG. 9A, for example, when the height H is 0.3 mm, only a few pores are observed inside the weld metal 30, indicating that the weld quality is good.

一方、高さＨが０．１ｍｍの場合、隙間Ｃが小さく、亜鉛系めっき層のめっき蒸気が十分に放散されないため、高さＨ＝０ｍｍの場合より気孔は減少したものの、気孔欠陥率は、２０％を超えていた。図８中、高さＨが０．１ｍｍの場合、溶接品質は、三角（△）印で表されている。 On the other hand, when the height H is 0.1 mm, the gap C is small and the plating vapor of the zinc-based plating layer is not sufficiently diffused. was over 20%. In FIG. 8, when the height H is 0.1 mm, the weld quality is indicated by a triangle (Δ) mark.

また、図９（Ｂ）に示すように、高さＨ＝０ｍｍの比較例の場合、溶接金属３０の内部には多くの気孔が観察された。比較例の溶接品質は、図８中、バツ（Ｘ）印で表されている。なお、図９中に示した溶接金属３０は、上記の溶接条件中、ワイヤ先端狙い位置がコーナーであって、起こし角が４５度の場合である。 In addition, as shown in FIG. 9B, in the case of the comparative example with the height H=0 mm, many pores were observed inside the weld metal 30 . The weld quality of the comparative example is represented by the cross (X) mark in FIG. The weld metal 30 shown in FIG. 9 is obtained under the above welding conditions, where the wire tip target position is a corner and the raised angle is 45 degrees.

また、図示を省略するが、ワイヤ先端狙い位置がコーナーから溶接ベース部材側に０．５ｍｍ逃がしであって、起こし角が６０度の場合でも、同様に、高さＨが０．２ｍｍ以上の場合、気孔欠陥率を２０％以下に抑制できた。 Also, although illustration is omitted, even when the wire tip target position is 0.5 mm away from the corner to the welding base member side and the raised angle is 60 degrees, similarly, when the height H is 0.2 mm or more , the pore defect rate could be suppressed to 20% or less.

一方、高さＨが１．０ｍｍを超える場合、気孔欠陥の発生は抑制できたものの、溶接時、ルート面に溶融金属が流入することから、溶接金属３０ののど厚が減少を開始し、溶接品質が低下する懸念があることが分かった。このように、本実施例では、Ｈ＝１．０ｍｍの値が、高さＨの上限値として好適であることが分かった。 On the other hand, when the height H exceeds 1.0 mm, although the occurrence of pore defects can be suppressed, the throat thickness of the weld metal 30 starts to decrease due to the flow of molten metal into the root surface during welding, It turns out that there is a concern that the quality will deteriorate. Thus, it was found that the value of H=1.0 mm is suitable as the upper limit value of the height H in this embodiment.

また、図８及び図９に示した厚みＴが約２．３ｍｍ（Ｔ＝２．３ｍｍ）の溝形鋼の他、厚みＴが異なる７種類の溝形鋼を用いて溶接ベース部材１０を製造して、鋼板製継手１００の溶接品質を同様に評価した。７種類の溝形鋼のそれぞれの厚みＴは、約１．０ｍｍ、約１．２ｍｍ、約１．６ｍｍ、約１．８ｍｍ、約２．９ｍｍ、約３．２ｍｍ及び約４．０ｍｍである。厚みＴ以外の、溝形鋼の仕様や、溶接電流及び溶接電圧を除く溶接条件等は、Ｔ＝２．３ｍｍの溝形鋼の場合と同じである。溶接電流及び溶接電圧は板厚に応じて裏抜け及び溶け落ちが生じないよう適切に調整した。 In addition to channel steel with a thickness T of about 2.3 mm (T=2.3 mm) shown in FIGS. Then, the welding quality of the steel plate joint 100 was similarly evaluated. The respective thicknesses T of the seven channel steels are about 1.0 mm, about 1.2 mm, about 1.6 mm, about 1.8 mm, about 2.9 mm, about 3.2 mm and about 4.0 mm. Other than the thickness T, the specifications of the channel steel and the welding conditions other than the welding current and welding voltage are the same as in the case of the channel steel with T=2.3 mm. Welding current and welding voltage were appropriately adjusted according to plate thickness so as not to cause strike-through and burn-through.

結果、７種類の溝形鋼においても、Ｔ＝２．３ｍｍの溝形鋼の場合と同様に、線状突起１４の高さＨが、０．２ｍｍ以上、１．０ｍｍ以下の範囲内で、溶接金属３０の溶接品質が良好であることが分かった。すなわち、１．０ｍｍ≦Ｔ≦４．０ｍｍの範囲内では、溶接ベース部材１０の線状突起１４の高さＨを、０．２ｍｍ以上、１．０ｍｍ以下に調整することが好ましい。１．０ｍｍ≦Ｔ≦４．０ｍｍの範囲内の厚みＴを有する鋼板製継手１００は、建築用部材において、剛性の確保とコスト性から実用性に優れている。 As a result, in the seven types of channel steel, as in the case of the channel steel with T = 2.3 mm, the height H of the linear projections 14 was within the range of 0.2 mm or more and 1.0 mm or less. It was found that the weld quality of the weld metal 30 was good. That is, within the range of 1.0 mm ≤ T ≤ 4.0 mm, it is preferable to adjust the height H of the linear protrusion 14 of the weld base member 10 to 0.2 mm or more and 1.0 mm or less. The steel plate joint 100 having a thickness T within the range of 1.0 mm ≤ T ≤ 4.0 mm is excellent in practicality in terms of ensuring rigidity and cost efficiency in construction members.

＜変形例＞
次に、図１０～図１２を参照して、本実施形態の変形例を説明する。なお、以下の変形例に係る溶接ベース部材及び鋼板製継手においては、図１～図９を用いて説明した溶接ベース部材１０及び鋼板製継手１００と異なる構成について主に説明する。また、変形例の溶接ベース部材及び鋼板製継手における他の構成については、図１～図９に示した溶接ベース部材１０及び鋼板製継手１００におけるそれぞれ同名の部材と等価であるため、重複説明を省略する。 <Modification>
Next, a modified example of this embodiment will be described with reference to FIGS. 10 to 12. FIG. In addition, in the welded base member and the steel plate joint according to the modifications below, mainly the configurations different from those of the welded base member 10 and the steel plate joint 100 described with reference to FIGS. 1 to 9 will be described. Further, other configurations of the welded base member and the steel plate joint of the modified example are equivalent to the same members of the welded base member 10 and the steel plate joint 100 shown in FIGS. omitted.

図１０（Ａ）に示すように、変形例に係る溶接ベース部材１０Ａでは、線状突起１４Ａ及び線状凹溝１８Ａは、本体１２のウェブ１２Ａではなく、フランジ１２Ｂに設けられてもよい。線状突起１４Ａは、溝形鋼のＣ字の外側に向かって突出する。溶接ベース部材１０Ａでは、フランジ１２Ｂの板面上に立て部材２０を突き当てて配置した際、線状突起１４Ａによって、めっき蒸気放散用の隙間Ｃを形成できる。 As shown in FIG. 10(A), in a welded base member 10A according to a modified example, the linear projections 14A and the linear grooves 18A may be provided not on the web 12A of the main body 12 but on the flange 12B. 14 A of linear protrusions protrude toward the outer side of C shape of channel steel. In the welding base member 10A, when the standing member 20 is placed against the plate surface of the flange 12B, the linear projections 14A can form the gaps C for dissipating the plating vapor.

また、図１０（Ｂ）に示すように、溶接ベース部材１０Ｂは、フランジ１２Ｂにリップが設けられたリップ溝形鋼であってもよい。また、図示を省略するが、溝形鋼以外の形鋼であっても、板面上に線状突起１４が作製可能な鋼板製部材である限り、形鋼の種類は限定されない。すなわち、本発明に係る溶接ベース部材としては各種の形鋼を採用できる。 Alternatively, as shown in FIG. 10B, the weld base member 10B may be a lip channel steel having a lip provided on the flange 12B. Also, although illustration is omitted, the type of shaped steel is not limited even if it is shaped steel other than channel steel, as long as it is a steel plate member capable of producing linear projections 14 on the plate surface. That is, various shaped steels can be employed as the welded base member according to the present invention.

また、図１０（Ｃ）に示すように、ウェブ１２Ａの板面上に、Ｃ字の内側に向かって突出する線状突起１４Ｃが、線状凹溝１８Ｃと共に設けられてもよい。図１０（Ｃ）中に例示した溶接ベース部材１０Ｃでは、リップ溝形鋼の内側に立て部材２０を突き当てて溶接する際、線状突起１４Ｃによって隙間Ｃを形成できる。なお、内側に突出する線状突起１４Ｃが設けられる形鋼としては、リップ溝形鋼に限定されず、リップを有さない溝形鋼等、他の形鋼も適宜採用できる。 Further, as shown in FIG. 10(C), linear projections 14C protruding toward the inside of the C-shape may be provided on the plate surface of the web 12A together with linear grooves 18C. In the welding base member 10C illustrated in FIG. 10(C), when the standing member 20 is abutted against the inner side of the lip channel steel and welded, the gap C can be formed by the linear projections 14C. Note that the shape steel provided with the inwardly protruding linear projections 14C is not limited to the lip channel steel, and other shape steel such as channel steel without a lip can be appropriately employed.

また、図１１（Ａ）に示すように、ウェブ１２Ａに、Ｃ字の外側に向かって突出する線状突起１４と、内側に向かって突出する線状突起１４Ｃとが、両方設けられてもよい。更に、フランジ１２Ｂに、外側に向かって突出する線状突起１４Ａが設けられてもよい。図１１（Ａ）中に例示した溶接ベース部材１０Ｄによれば、ウェブ１２Ａ及びフランジ１２Ｂにそれぞれ線状突起１４，１４Ａ，１４Ｃが設けられているため、汎用性が高められている。 Further, as shown in FIG. 11A, both linear projections 14 projecting outward of the C-shape and linear projections 14C projecting inward may be provided on the web 12A. . Further, the flange 12B may be provided with a linear projection 14A projecting outward. According to the welding base member 10D illustrated in FIG. 11(A), since the web 12A and the flange 12B are provided with the linear projections 14, 14A, and 14C, respectively, versatility is enhanced.

また、図１１（Ｂ）に示すように、溝形鋼としてリップ溝形鋼を採用し、線状突起１４，１４Ａ，１４Ｃがウェブ１２Ａ及びフランジ１２Ｂに設けられることに加え、更に、リップに、Ｃ字の外側に向かって突出する線状突起１４Ｅが設けられてもよい。図１１（Ｂ）中に例示した溶接ベース部材１０Ｅによっても、図１１（Ａ）中の溶接ベース部材１０Ｄと同様に、汎用性が高められている。すなわち、線状突起は、隙間Ｃを形成できる限り、ウェブ、フランジ、リップのそれぞれに対して、任意の位置、個数、向きを組み合わせて実現できる。 Further, as shown in FIG. 11(B), lip channel steel is adopted as the channel steel, and linear projections 14, 14A, and 14C are provided on the web 12A and the flange 12B. A linear projection 14E projecting outward of the C shape may be provided. The welding base member 10E exemplified in FIG. 11(B) also has enhanced versatility, like the welding base member 10D in FIG. 11(A). That is, as long as the gap C can be formed, the linear projections can be realized by combining arbitrary positions, numbers, and directions with respect to each of the web, the flange, and the lip.

なお、図１２に示すように、外側に突出する線状突起１４及び内側に突出する線状突起１４Ｃがウェブ１２Ａに設けられた溶接ベース部材１０Ｆを用いて溶接する際、溶接金属３０（溶接ビード）に、線状凹溝１８Ｃが含まれる場合がある。このため、隙間の最大高さは、線状突起１４の高さＨと線状凹溝１８Ｃの深さＤとの和となる。 As shown in FIG. 12, when welding is performed using the weld base member 10F in which the linear projections 14 projecting outward and the linear projections 14C projecting inward are provided on the web 12A, the weld metal 30 (weld bead ) may include linear grooves 18C. Therefore, the maximum height of the gap is the sum of the height H of the linear protrusion 14 and the depth D of the linear groove 18C.

ここで、溶接金属３０の線状凹溝１８Ｃの部分におけるのど厚は、線状凹溝１８Ｃ以外の部分におけるのど厚と比べ、減少する。このため、溶接ベース部材１０Ｆが、図９中に示した実施例に係る溶接ベース部材と、線状突起１４の高さＨ以外、同じ仕様を有する場合、亜鉛系めっき層の厚みを除く実質的な隙間の高さが、１．０ｍｍ以下であることが好ましい。具体的には、例えば、線状突起１４の高さＨ及び線状凹溝１８Ｃの深さＤが０．５ｍｍの場合、実質的な隙間の高さが、１．０ｍｍ以下になる。 Here, the throat thickness of the weld metal 30 at the portion of the linear groove 18C is smaller than the throat thickness of the portion other than the linear groove 18C. Therefore, if the weld base member 10F has the same specifications as the weld base member according to the embodiment shown in FIG. It is preferable that the height of the gap is 1.0 mm or less. Specifically, for example, when the height H of the linear protrusion 14 and the depth D of the linear groove 18C are 0.5 mm, the substantial height of the gap is 1.0 mm or less.

＜その他の実施形態＞
本発明は上記の開示した実施の形態によって説明したが、この説明は、本発明を限定するものではない。本開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかになると考えられるべきである。例えば、本実施形態では、溶接ベース部材１０の板面上に線状突起１４が設けられていたが、本発明では、これに限定されず、立て部材２０の板面上に線状突起１４が設けられてもよい。 <Other embodiments>
While the invention has been described in terms of the above disclosed embodiments, this description is not intended to limit the invention. It should be considered that various alternative embodiments, examples and operational techniques will become apparent to those skilled in the art from this disclosure. For example, in the present embodiment, the linear protrusions 14 are provided on the plate surface of the welding base member 10, but the present invention is not limited to this, and the linear protrusions 14 are provided on the plate surface of the standing member 20. may be provided.

立て部材２０が線状突起１４を有することによって、立て部材２０が、溶接ベース部材１０との接合部から離間した位置において、異なる鋼板製部材との間でＴ字型の鋼板製継手を構成することが可能になる。すなわち、立て部材２０を溶接ベース部材１０として使用することができる。 By having the linear protrusions 14 on the upright member 20, the upright member 20 constitutes a T-shaped steel plate joint with a different steel plate member at a position spaced apart from the joint with the welding base member 10. becomes possible. That is, the upright member 20 can be used as the welding base member 10 .

更に、同一外形及び同板厚の鋼板製部材を用いて鋼板製継手１００を製造する場合、溶接ベース部材１０及び立て部材２０の両方が線状突起１４を有する同じ仕様であることによって、母材として用意する鋼板製部材の種類が集約される。このため、在庫負担を抑制できると共に、在庫管理の効率化を促進できる。 Furthermore, when the steel plate joint 100 is manufactured using steel plate members having the same outer shape and the same plate thickness, both the weld base member 10 and the standing member 20 have the same specifications having the linear projections 14, so that the base metal The types of steel plate members prepared as As a result, it is possible to reduce the inventory burden and promote efficiency in inventory management.

また、本実施形態では、隅肉溶接によってＴ字型の鋼板製継手１００が製造される場合が例示されたが、本発明では、これに限定されない。端面が線状突起１４に対向するように立て部材２０が溶接ベース部材１０の板面上に立てて溶接される限り、開先溶接が行われてもよい。 Further, in the present embodiment, the case where the T-shaped steel plate joint 100 is manufactured by fillet welding is exemplified, but the present invention is not limited to this. Groove welding may be performed as long as the upright member 20 is upright on the plate surface of the welding base member 10 and welded such that the end face faces the linear projection 14 .

また、図１～図１２中に示した構成を組み合わせて、本発明に係る溶接ベース部材及び鋼板製継手を構成することもできる。本発明は、上記に記載していない様々な実施の形態等を含むと共に、本発明の技術的範囲は、上記の説明から妥当な特許請求の範囲の発明特定事項によってのみ定められるものである。 Also, the configurations shown in FIGS. 1 to 12 can be combined to configure the welded base member and the steel plate joint according to the present invention. The present invention includes various embodiments not described above, and the technical scope of the present invention is defined only by the matters specifying the invention in the scope of claims that are valid from the above description.

１０，１０Ａ～１０Ｆ溶接ベース部材
１２本体
１４，１４Ａ，１４Ｃ，１４Ｅ線状突起
１８，１８Ａ，１８Ｃ線状凹溝
２０立て部材
３０溶接金属
４２フォーミングロール
１００鋼板製継手
Ａ中心軸
Ｃ隙間 10, 10A to 10F Welded base member 12 Main body 14, 14A, 14C, 14E Linear projections 18, 18A, 18C Linear groove 20 Standing member 30 Weld metal 42 Forming roll 100 Steel plate joint A Central axis C Gap

Claims

鋼板製の本体、前記本体の一方の板面上で前記本体の長手方向全体に亘って延びると共に前記一方の板面から測った高さが前記本体の厚み以下の線状突起、及び、前記本体の他方の板面上に前記線状突起に対応して形成された線状凹溝を有する溶接ベース部材と、
端面が前記線状突起と対向するように、前記溶接ベース部材の前記一方の板面上に配置された鋼板製の立て部材と、
前記溶接ベース部材及び前記立て部材のうち少なくとも一方の表面を被覆して設けられた亜鉛系めっき層と、
前記溶接ベース部材と前記立て部材とを接合する溶接金属と、
を備える鋼板製継手。 a main body made of a steel plate, linear protrusions extending along the entire longitudinal direction of the main body on one plate surface of the main body and having a height measured from the one plate surface equal to or less than the thickness of the main body; A welding base member having linear grooves formed corresponding to the linear projections on the other plate surface of the welding base member;
a standing member made of a steel plate arranged on the one plate surface of the welding base member so that the end face faces the linear projection;
a zinc-based plating layer provided to cover the surface of at least one of the weld base member and the standing member;
a weld metal that joins the welding base member and the standing member;
A steel plate joint with

前記線状突起の高さは、０．２ｍｍ以上である、請求項１に記載の鋼板製継手。 The steel plate joint according to claim 1, wherein the linear projection has a height of 0.2 mm or more.

前記線状突起の高さは、１．０ｍｍ以下である、請求項１又は２に記載の鋼板製継手。 The steel plate joint according to claim 1 or 2, wherein the linear projection has a height of 1.0 mm or less.

前記線状突起は、複数本である、請求項１～３のいずれか１項に記載の鋼板製継手。 The steel plate joint according to any one of claims 1 to 3, wherein the linear projections are plural.

前記線状突起の本数は、偶数であり、
複数本の前記線状突起は、前記本体の中心軸を挟んで離間配置されている、請求項４に記載の鋼板製継手。 The number of linear projections is an even number,
The steel plate joint according to claim 4, wherein the plurality of linear projections are spaced apart with respect to the central axis of the main body.

鋼板製部材の本体の一方の板面上で前記本体の長手方向全体に亘って延びると共に前記一方の板面から測った高さが前記本体の厚み以下の線状突起を形成するように、前記本体の鋼板の領域の一部を、他方の板面側から前記一方の板面側に向かって前記本体から線状に押し出す工程と、
前記鋼板をロールフォーミングして形鋼を作製する工程と、
を含み、
前記押し出す工程は、前記形鋼を作製する工程が行われるフォーミングラインと同じ前記フォーミングラインで行う、
溶接ベース部材の製造方法。 on one plate surface of the main body of the steel plate member so as to form a linear projection that extends along the entire longitudinal direction of the main body and has a height measured from the one plate surface that is equal to or less than the thickness of the main body; a step of linearly extruding a part of the steel plate region of the main body from the main body from the other plate surface side toward the one plate surface side;
a step of roll forming the steel plate to produce a shaped steel;
including
The extruding step is performed on the same forming line as the forming line on which the step of making the shaped steel is performed,
A method for manufacturing a welded base member.

請求項１～５のいずれか１項に記載の鋼板製継手を製造する鋼板製継手の製造方法であって、
鋼板製の本体、前記本体の一方の板面上で前記本体の長手方向全体に亘って延びると共に前記一方の板面から測った高さが前記本体の厚み以下の線状突起、及び、前記本体の他方の板面上に前記線状突起に対応して形成された線状凹溝を有する溶接ベース部材、並びに、鋼板製の立て部材を用意する工程であって、前記溶接ベース部材及び前記立て部材のうち少なくとも一方の表面に亜鉛系めっき層が被覆された前記溶接ベース部材及び前記立て部材を用意する工程と、
前記立て部材の端面が前記線状突起と対向するように前記立て部材を前記溶接ベース部材の前記板面の上に配置して、前記溶接ベース部材と前記立て部材との間に隙間を形成する工程と、
前記溶接ベース部材と前記立て部材とを溶接する工程と、
を含む鋼板製継手の製造方法。 A steel plate joint manufacturing method for manufacturing the steel plate joint according to any one of claims 1 to 5,
a main body made of a steel plate, linear protrusions extending along the entire longitudinal direction of the main body on one plate surface of the main body and having a height measured from the one plate surface equal to or less than the thickness of the main body; A step of preparing a welding base member having linear grooves formed corresponding to the linear projections on the other plate surface of the welding base member and a standing member made of steel plate, wherein the welding base member and the standing member a step of preparing the welding base member and the standing member, in which at least one surface of the member is coated with a zinc-based plating layer;
A gap is formed between the welding base member and the standing member by placing the standing member on the plate surface of the welding base member so that the end face of the standing member faces the linear projection. process and
welding the welding base member and the standing member;
A method for manufacturing a steel plate joint comprising: