JP2016079752A - Section steel for beam member and method for forming through-hole - Google Patents

Section steel for beam member and method for forming through-hole Download PDF

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JP2016079752A
JP2016079752A JP2014214708A JP2014214708A JP2016079752A JP 2016079752 A JP2016079752 A JP 2016079752A JP 2014214708 A JP2014214708 A JP 2014214708A JP 2014214708 A JP2014214708 A JP 2014214708A JP 2016079752 A JP2016079752 A JP 2016079752A
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hole
web
flange
beam member
cylindrical
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JP6229633B2 (en
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坂本　義仁
Yoshihito Sakamoto
義仁 坂本
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide inexpensive section steel for a beam member, in which a through-hole can be reinforced without using a reinforcing member or increasing the thickness of a web, and a method for forming a through-hole.SOLUTION: The section steel for a beam member is provided that includes upper and lower flanges 12 and 14, and a web 16 which connects the upper and lower flanges 12 and 14 together and in which a through-hole 18 is opened. The through-hole 18 is formed in such a way that an inside diameter of an opening provided in the web 16 is enlarged by plastic working for cylindrically and plastically deforming the periphery of the opening and a flange 20 is formed to protrude in one direction orthogonal to the web 16.SELECTED DRAWING: Figure 1

Description

本発明は、建築構造物の設備用配管を挿通するための貫通孔が開けられた梁部材用形鋼およびこの貫通孔の形成方法に関するものである。   TECHNICAL FIELD The present invention relates to a beam member shape steel having a through-hole for inserting a facility pipe of a building structure and a method for forming the through-hole.

従来、建築構造物における鋼製梁のウェブには、設備用配管を挿通するための貫通孔（開口部）が設けられており、この貫通孔には必要に応じて補強処理が施される。この貫通孔は通常、梁ウェブの高さ方向中央位置に設けられるため、曲げモーメントによるこの部分の圧縮応力や引張応力は小さく、曲げ強度の低下は大きくない。しかしながら、この部分はせん断応力が大きく作用する箇所であることから、貫通孔は梁のせん断耐力に影響を与える。すなわち、梁にせん断力が作用すると貫通孔がせん断力によって変形するため、そのせん断耐力の低下分の補強が必要である。   Conventionally, a steel beam web in a building structure has been provided with a through hole (opening) through which a facility pipe is inserted, and the through hole is subjected to reinforcement treatment as necessary. Since this through hole is normally provided at the center in the height direction of the beam web, the compressive stress and tensile stress of this portion due to the bending moment are small, and the bending strength is not greatly reduced. However, since this portion is a portion where shear stress acts greatly, the through hole affects the shear strength of the beam. That is, when a shearing force is applied to the beam, the through hole is deformed by the shearing force, and therefore, the reduction of the shear strength is required.

貫通孔に対する従来の補強方法としては、例えば非特許文献１に記載の図８、図９にあるように、梁ウェブ部材の板厚を部分的に厚くする方法や、補強部材を別途取り付ける方法が知られている。   As a conventional reinforcing method for the through hole, for example, as shown in FIGS. 8 and 9 described in Non-Patent Document 1, there is a method of partially increasing the plate thickness of the beam web member or a method of attaching a reinforcing member separately. Are known.

また、こうした従来の補強方法を改善する技術として、鋼製梁に対する補強部材の固着作業における作業性がよく、より少ない材料で貫通孔に対する十分な補強作用を確保し得る効率的な補強技術が提案されている（例えば、特許文献１を参照）。また、溶接する手間を省いて作業性を向上し、かつ簡便な構造で実現することのできる鋼材への補強用スリーブの取り付け構造が提案されている（例えば、特許文献２を参照）。   In addition, as a technology to improve these conventional reinforcement methods, an efficient reinforcement technology is proposed that has good workability in fixing work of reinforcement members to steel beams and can ensure sufficient reinforcement action for through holes with less material. (For example, refer to Patent Document 1). Further, there has been proposed a structure for attaching a reinforcing sleeve to a steel material, which can improve the workability by omitting the welding work and can be realized with a simple structure (see, for example, Patent Document 2).

特許文献１に記載の構造は、鋼製梁に形成される貫通孔とほぼ同形の開口部を有し、かつ（１）０．１５≦Ａｒ／Ａｗ≦０．７、（２）０．６≦Ｖｒ／Ｖｗ≦３．３、（３）０．５≦Ｈｒ／Ｔｒ≦５．０の３つの条件（Ａｒは補強部材の断面積、Ａｗは貫通孔によるウェブの欠損部の断面積、Ｖｒは補強部材の体積、Ｖｗは貫通孔によるウェブの欠損部の体積、Ｈｒは補強部材の高さ、Ｔｒは補強部材の肉厚）を満たす矩形断面からなるリング状の補強部材を用い、この補強部材を貫通孔の周辺部のウェブの片面に溶接して一体化することにより、鋼製梁に形成する貫通孔を補強するものである。   The structure described in Patent Document 1 has an opening substantially the same shape as a through hole formed in a steel beam, and (1) 0.15 ≦ Ar / Aw ≦ 0.7, (2) 0.6. ≦ Vr / Vw ≦ 3.3, (3) Three conditions of 0.5 ≦ Hr / Tr ≦ 5.0 (Ar is the cross-sectional area of the reinforcing member, Aw is the cross-sectional area of the missing portion of the web due to the through hole, Vr Is the volume of the reinforcing member, Vw is the volume of the missing part of the web due to the through hole, Hr is the height of the reinforcing member, and Tr is the thickness of the reinforcing member). The member is welded and integrated with one side of the web around the through-hole to reinforce the through-hole formed in the steel beam.

特許文献２に記載の構造は、鋼製梁のウェブの挿通孔（貫通孔）に補強用スリーブを配するものである。この補強用スリーブは、スリーブ本体と、これに一体的に形成される一対のフランジとからなる。各フランジは、スリーブ本体の軸線方向中央部付近に、スリーブ本体が挿通孔に挿入された状態で、挿通孔を形成する内周面より直径外方向へ向けて膨出するようにかしめ形成される。各フランジ間に挿通孔の周縁部が挟まれることによって、補強用スリーブが梁に固着される。   In the structure described in Patent Document 2, a reinforcing sleeve is arranged in an insertion hole (through hole) of a steel beam web. The reinforcing sleeve includes a sleeve body and a pair of flanges formed integrally therewith. Each flange is caulked near the central portion in the axial direction of the sleeve body so as to bulge outwardly from the inner peripheral surface forming the insertion hole in a state where the sleeve body is inserted into the insertion hole. . The reinforcing sleeve is fixed to the beam by sandwiching the peripheral portion of the insertion hole between the flanges.

また、工業化住宅では、任意の配管ルートが形成できるように、予め所定の間隔、大きさで貫通孔が複数設けられている梁部材を用いることがある。この場合、部材点数の削減、溶接手間の削減の観点から、ウェブ貫通孔による強度低下を考慮して、梁部材のウェブ板厚全体を厚くして、貫通孔補強を省略することがある。   Further, in an industrialized house, a beam member in which a plurality of through holes are provided in advance with a predetermined interval and size may be used so that an arbitrary piping route can be formed. In this case, from the viewpoint of reducing the number of members and the labor required for welding, considering the strength reduction due to the web through hole, the entire web plate thickness of the beam member may be increased and the through hole reinforcement may be omitted.

長尾直治、設備技術者のための建築構造入門（２）躯体貫通と構造補強、空気調和・衛生工学第８１巻第３号、ｐｐ．２１９−２２７Naoji Nagao, Introduction to Building Structures for Facility Engineers (2) Body penetration and structural reinforcement, Air Conditioning and Sanitary Engineering Vol. 81, No. 3, pp. 219-227

特開２００７−１６２２４３号公報JP 2007-162243 A 特開平８−４９３４７号公報JP-A-8-49347

ところで、上記の非特許文献１に例示される従来の補強方法では、ウェブ貫通孔の穴あけ工程に加えて、溶接により補強部材を取り付けるため、部品点数の増加、溶接手間が増大する問題がある。   By the way, in the conventional reinforcement method illustrated by said nonpatent literature 1, since a reinforcement member is attached by welding in addition to the drilling process of a web through-hole, there exists a problem which the increase in a number of parts and a welding effort increase.

また、上記の特許文献１に示される技術では、貫通孔補強面を片面として部材点数を削減しているが、依然として溶接作業が必要であり、熱ひずみの問題や、予め塗装やめっきをした材料を使用した場合には、溶接後に別途、塗装やめっきの補修が必要になるといった問題がある。   Moreover, in the technique shown by said patent document 1, although the number of members is reduced by making a through-hole reinforcement surface into one side, the welding work is still required, the problem of a heat distortion, the material which painted and plated beforehand When using, there is a problem that it is necessary to separately repair coating or plating after welding.

また、上記の特許文献２に示される技術では、補強用スリーブのフランジをかしめて接合することで溶接作業を省略しているが、特殊なフランジを有する補強用スリーブが必須になるといった問題がある。   Further, in the technique disclosed in Patent Document 2, welding work is omitted by caulking and joining the flange of the reinforcing sleeve, but there is a problem that a reinforcing sleeve having a special flange becomes essential. .

また、上記の工業化住宅の梁部材で採用されるウェブ板厚全体を厚くする方法は、部材のコスト削減が図りにくいという問題がある。   In addition, the method of increasing the entire web thickness adopted for the beam member of the industrialized house described above has a problem that it is difficult to reduce the cost of the member.

本発明は、上記に鑑みてなされたものであって、補強部材を用いたり、ウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼および貫通孔の形成方法を提供することを目的とする。   The present invention has been made in view of the above, and it is possible to reinforce a through-hole without using a reinforcing member or increasing the thickness of a web, and a method for forming a through-hole for a low-cost beam member. The purpose is to provide.

上記した課題を解決し、目的を達成するために、本発明に係る梁部材用形鋼は、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成されることを特徴とする。   In order to solve the above-described problems and achieve the object, a steel beam for a beam member according to the present invention is for a beam member including an upper and lower flange and a web that connects the upper and lower flanges and has a through hole. The shape of the through-hole is such that the inner diameter of the opening is increased by plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape, and a flange is provided in one direction orthogonal to the web. It is formed so as to protrude.

また、本発明に係る他の梁部材用形鋼は、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成されることを特徴とする。   Further, another structural member for a beam member according to the present invention is a structural steel for a beam member comprising an upper and lower flange and a web that connects the upper and lower flanges and has a through hole formed therein. The flange portion is formed so as to protrude in one direction perpendicular to the web by punching out the lid portion of the protruding portion formed by plastic working that plastically deforms a part of the web into a covered cylindrical shape. To do.

また、本発明に係る他の梁部材用形鋼は、上述した発明において、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジに設けた固定用貫通穴に挿通した固定治具で固定したことを特徴とする。   Further, in the above-described invention, the beam member for a beam member according to the present invention is formed in the through hole by inserting and arranging a cylindrical member having an outer diameter substantially the same as the inner diameter of the through hole in the through hole. The flange and the cylindrical member are fixed by a fixing jig inserted through a fixing through hole provided in the flange.

また、本発明に係る他の梁部材用形鋼は、上述した発明において、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジの内面および前記円筒部材の外面にそれぞれ形成した溝同士を係合して固定したことを特徴とする。   Further, in the above-described invention, the beam member for a beam member according to the present invention is formed in the through hole by inserting and arranging a cylindrical member having an outer diameter substantially the same as the inner diameter of the through hole in the through hole. The flange and the cylindrical member are fixed by engaging grooves formed on the inner surface of the flange and the outer surface of the cylindrical member, respectively.

また、本発明に係る他の梁部材用形鋼は、上述した発明において、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記円筒部材の外面または端部に設けた爪状部を、前記貫通孔に形成した前記フランジの先端に嵌合したことを特徴とする。   Further, in the above-mentioned invention, the beam member for a beam member according to the present invention includes a cylindrical member having an outer diameter that is substantially the same as the inner diameter of the through hole, and is inserted into the through hole. A claw-like portion provided at the end portion is fitted to the tip of the flange formed in the through hole.

また、本発明に係る貫通孔の形成方法は、上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成することを特徴とする。   Further, the through hole forming method according to the present invention is a method of forming a through hole in the web of a beam for a beam member comprising an upper and lower flange and a web connecting the upper and lower flanges, By expanding the inner diameter of the opening by plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape, the flange is protruded in one direction perpendicular to the web, and the through hole is formed. It is characterized by forming.

また、本発明に係る他の貫通孔の形成方法は、上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成することを特徴とする。   In addition, another through hole forming method according to the present invention is a method of forming a through hole in the web of a beam for a beam member comprising an upper and lower flange and a web connecting the upper and lower flanges. The flange is formed so as to protrude in one direction perpendicular to the web by punching out the lid portion of the protruding portion formed by plastic working that plastically deforms a part of the web into a covered cylinder, and the through hole It is characterized by forming.

本発明に係る梁部材用形鋼によれば、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成されるので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   According to the shape member for a beam member according to the present invention, the shape member for the beam member includes an upper and lower flange and a web that connects the upper and lower flanges and has a through hole formed therein. By plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape, the inner diameter of the opening is increased and the flange is protruded in one direction orthogonal to the web. Even if the increase in the number of members and the addition of reinforcing members are omitted, deformation of the through-holes when shearing force is applied to the beam members can be suppressed. As a result, the cost can be reduced by reducing the number of members and manufacturing man-hours. There is an effect that it can be achieved. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

また、本発明に係る他の梁部材用形鋼によれば、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成されるので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   Further, according to another structural member for a beam member according to the present invention, the structural member for a beam member comprising an upper and lower flange and a web that connects the upper and lower flanges and has a through hole formed therein. Since the hole is formed so as to project the flange in one direction orthogonal to the web by punching out the lid portion of the projecting portion formed by plastic processing that plastically deforms a part of the web into a covered cylinder, Even if the increase in web plate thickness and the addition of reinforcing members are omitted, deformation of the through-hole when shearing force is applied to the beam member can be suppressed. As a result, the number of members and the number of manufacturing steps can be reduced. There is an effect that the cost can be reduced. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジに設けた固定用貫通穴に挿通した固定治具で固定したので、フランジと円筒部材とを容易に固定することができるという効果を奏する。また、貫通孔に挿通配置した円筒部材によって、梁部材に対する耐火被覆工事の際に貫通孔の形状を保持することができる。さらに、円筒部材を厚肉化および高強度化してフランジに接合固定すれば、貫通孔の強度をより高めることができる。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter dimension substantially the same as the inner diameter dimension of the through hole is inserted and disposed in the through hole, and the flange formed in the through hole; Since the cylindrical member is fixed by a fixing jig inserted through a fixing through hole provided in the flange, there is an effect that the flange and the cylindrical member can be easily fixed. Moreover, the shape of the through hole can be maintained during the fireproof coating work for the beam member by the cylindrical member inserted and disposed in the through hole. Furthermore, if the cylindrical member is increased in thickness and strength and is fixedly bonded to the flange, the strength of the through hole can be further increased.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジの内面および前記円筒部材の外面にそれぞれ形成した溝同士を係合して固定したので、フランジと円筒部材とをより容易に固定することができるという効果を奏する。特に、溝同士を係合することで簡単に強固な補強構造を得ることができる。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter dimension substantially the same as the inner diameter dimension of the through hole is inserted and disposed in the through hole, and the flange formed in the through hole; Since the cylindrical member is fixed by engaging the grooves formed on the inner surface of the flange and the outer surface of the cylindrical member, there is an effect that the flange and the cylindrical member can be more easily fixed. In particular, a strong reinforcing structure can be easily obtained by engaging the grooves.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記円筒部材の外面または端部に設けた爪状部を、前記貫通孔に形成した前記フランジの先端に嵌合したので、貫通孔に挿通配置する円筒部材の位置決め固定が容易になるという効果を奏する。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter that is substantially the same as the inner diameter of the through hole is inserted and disposed in the through hole, and the outer surface or the end of the cylindrical member is disposed. Since the provided claw-like portion is fitted to the tip of the flange formed in the through hole, there is an effect that positioning and fixing of the cylindrical member inserted and arranged in the through hole is facilitated.

また、本発明に係る貫通孔の形成方法によれば、上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成するので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。   Moreover, according to the formation method of the through-hole which concerns on this invention, It is a method of forming a through-hole with respect to the said web of the shape steel for beam members provided with an upper and lower flange and the web which connects this upper and lower flange. The opening of the web is plastically deformed in a cylindrical shape around the opening, the inside diameter of the opening is increased, and a flange is protruded in one direction perpendicular to the web. Since the hole is formed, even if the increase in the web plate thickness or the addition of the reinforcing member is omitted, the deformation of the through-hole when the shearing force is applied to the beam member can be suppressed. As a result, the number of members can be reduced. There is an effect that the cost can be reduced by reducing the number of manufacturing steps.

また、本発明に係る他の貫通孔の形成方法によれば、上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成するので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。   Moreover, according to the other through-hole formation method which concerns on this invention, By a method of forming a through-hole with respect to the said web of the structural steel for beam members provided with an upper and lower flange and the web which connects this upper and lower flange And punching out the lid portion of the projecting portion formed by plastic working to plastically deform a part of the web into a covered cylinder, so as to project a flange in one direction perpendicular to the web, Since through-holes are formed, deformation of the through-holes when shearing force is applied to the beam members can be suppressed even if the increase in web plate thickness and the addition of reinforcing members are omitted. There is an effect that it is possible to reduce costs by reducing the number of manufacturing steps and man-hours.

図１は、本発明の実施の形態１に係る梁部材用形鋼を示す貫通孔の断面図である。FIG. 1 is a cross-sectional view of a through hole showing a beam member shape steel according to Embodiment 1 of the present invention. 図２は、本発明の実施の形態１に係る貫通孔の形成方法を示す断面図であり、（ａ）は第一工程において先孔を形成した状態を示す図、（ｂ）は第二工程において先孔を拡径しフランジを形成する状態を示す図、（ｃ）は貫通孔の形成が終了した状態を示す図である。2A and 2B are cross-sectional views illustrating a method for forming a through hole according to Embodiment 1 of the present invention, in which FIG. 2A is a diagram illustrating a state in which a leading hole is formed in the first step, and FIG. The figure which shows the state which expands a tip hole and forms a flange in (c) is a figure which shows the state which formation of the through-hole was complete | finished. 図３は、本発明の実施の形態２に係る貫通孔の形成方法を示す断面図であり、（ａ）は第一工程においてウェブに突出部を形成した状態を示す図、（ｂ）は第二工程において蓋部分を打ち抜いた状態を示す図である。FIG. 3 is a cross-sectional view illustrating a method for forming a through hole according to Embodiment 2 of the present invention, where (a) is a diagram illustrating a state in which a protrusion is formed on a web in the first step, and (b) is a first diagram. It is a figure which shows the state which punched the cover part in two processes. 図４は、本発明の実施の形態３に係る梁部材用形鋼を示す貫通孔の断面図である。FIG. 4 is a cross-sectional view of the through hole showing the beam member shape steel according to the third embodiment of the present invention. 図５は、本発明の実施の形態４に係る梁部材用形鋼を示す貫通孔の断面図である。FIG. 5 is a cross-sectional view of a through hole showing a beam member shape steel according to a fourth embodiment of the present invention. 図６は、本発明の実施の形態５に係る梁部材用形鋼を示す貫通孔の断面図である。FIG. 6 is a cross-sectional view of the through hole showing the beam member shape steel according to the fifth embodiment of the present invention.

以下に、本発明に係る梁部材用形鋼および貫通孔の形成方法の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   DESCRIPTION OF EMBODIMENTS Embodiments of a beam member shape steel and a through hole forming method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

［実施の形態１］
まず、本発明の実施の形態１について説明する。
図１に示すように、本実施の形態１の梁部材用形鋼１００は、上フランジ１２および下フランジ１４と、これら上下フランジ１２、１４を連結するウェブ１６とを備える梁部材用のＨ形鋼（鉄骨梁）である。ウェブ１６には、設備用配管を挿通するための貫通孔１８が開けられている。 [Embodiment 1]
First, the first embodiment of the present invention will be described.
As shown in FIG. 1, a beam member shape steel 100 according to the first embodiment includes an upper flange 12, a lower flange 14, and a web 16 that connects the upper and lower flanges 12, 14. Steel (steel beam). The web 16 has a through hole 18 through which the facility pipe is inserted.

貫通孔１８は、ウェブ１６に設けた開口の周囲を円筒状に塑性変形させる塑性加工により、開口の内径を拡径するとともに、ウェブ１６と直交する一方向に円筒状のフランジ２０を突出するように形成されている。   The through-hole 18 expands the inner diameter of the opening by plastic deformation that plastically deforms the periphery of the opening provided in the web 16 into a cylindrical shape, and protrudes the cylindrical flange 20 in one direction orthogonal to the web 16. Is formed.

本実施の形態１の梁部材用形鋼１００によれば、ウェブ１６の板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔１８の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   According to the beam member shape steel 100 of the first embodiment, even if the increase in the plate thickness of the web 16 or the addition of a reinforcing member is omitted, the deformation of the through hole 18 when a shearing force is applied to the beam member. As a result, the cost can be reduced by reducing the number of members and the number of manufacturing steps. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

次に、本実施の形態１の貫通孔の形成方法について説明する。
まず、図２（ａ）に示す第一工程において、貫通孔１８の先孔として、パンチングで円形の開口２２をウェブ１６に設ける。ここで、円形の開口２２の開口径は最終的に得たい貫通孔１８の開口径の１／２．５より大きな径とする。次いで、図２（ｂ）に示す第二工程において、フランジ２０を突出させる側に円柱状の凹部２４を有する凹型の金型２６を配置し、その反対側から先端部分が先細りの曲面形状で胴部分が円柱状の凸型の金型２８を回転させながら開口２２に押し付けて凹型の金型２６の凹部２４に挿し入れ、開口２２の周囲を円筒状に塑性変形させるバーリング加工（塑性加工）を行う。ここで、凹型の金型２６と凸型の金型２８は、ウェブ１６の板厚に応じた必要なクリアランスをとっている。最後に、図２（ｃ）に示すように、フランジ２０の立ち上がり加工を行う。 Next, a method for forming a through hole according to the first embodiment will be described.
First, in the first step shown in FIG. 2A, a circular opening 22 is provided in the web 16 by punching as a leading hole of the through hole 18. Here, the opening diameter of the circular opening 22 is set to be larger than 1 / 2.5 of the opening diameter of the through hole 18 to be finally obtained. Next, in the second step shown in FIG. 2 (b), a concave mold 26 having a cylindrical recess 24 is arranged on the side from which the flange 20 is projected, and from the opposite side, the tip part is tapered and has a curved shape. A burring process (plastic working) is performed in which a convex mold 28 having a cylindrical part is rotated and pressed against the opening 22 and inserted into the concave part 24 of the concave mold 26 to plastically deform the periphery of the opening 22 into a cylindrical shape. Do. Here, the concave mold 26 and the convex mold 28 have a necessary clearance according to the thickness of the web 16. Finally, as shown in FIG. 2C, the rising process of the flange 20 is performed.

このようにすることで、先孔である開口２２の内径を拡径するとともに、その全周にわたってウェブ１６と直交する一方向にフランジ２０を突出するように形成して、貫通孔１８を形成することができる。形成されたフランジ２０が貫通孔１８を補強することで、貫通孔１８を設けたことによるウェブ１６のせん断耐力低下を抑制することができる。   By doing in this way, while expanding the internal diameter of the opening 22 which is a tip hole, it forms so that the flange 20 may protrude in one direction orthogonal to the web 16 over the perimeter, and the through-hole 18 is formed. be able to. Since the formed flange 20 reinforces the through hole 18, a decrease in shear strength of the web 16 due to the provision of the through hole 18 can be suppressed.

また、梁部材を構成する鋼材は、例えば引張強度４００ＭＰａクラスの一般構造用でもよいが、深絞り性の評価指標であるランクフォード値（以下、ｒ値という。）、伸びフランジ性の評価指標である穴拡げ率（以下、λという。）は、大きいほどよく、例えば、ｒ値平均≧１．２、λ≧８０％を有する深絞り性および伸びフランジ性に優れた高強度溶融亜鉛めっき鋼板を使用すると、溶接を行わないメリットをさらに活かすことができる。   The steel material constituting the beam member may be, for example, for a general structure having a tensile strength of 400 MPa class, but is a Rankford value (hereinafter referred to as r value) which is an evaluation index of deep drawability, and an evaluation index of stretch flangeability. A certain hole expansion rate (hereinafter referred to as λ) is better as it is larger. For example, a high-strength hot-dip galvanized steel sheet having an excellent r-drawing property and stretch flangeability having an r value average ≧ 1.2 and λ ≧ 80%. If used, the advantage of not performing welding can be further utilized.

本実施の形態１の貫通孔の形成方法によれば、ウェブ１６の板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔１８の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。   According to the through hole forming method of the first embodiment, even if the increase in the thickness of the web 16 or the addition of a reinforcing member is omitted, the deformation of the through hole 18 when a shearing force is applied to the beam member is suppressed. As a result, the cost can be reduced by reducing the number of members and the number of manufacturing steps.

なお、本実施の形態１においては、梁部材用形鋼１００がＨ形鋼で構成される場合について説明したが、本発明はこれに限るものではなく、Ｈ形鋼の代わりに例えば溝形鋼で構成してもよく、いずれにしても本発明と同一の作用効果を奏することができる。   In addition, in this Embodiment 1, although the case where the beam member shape steel 100 was comprised with H-section steel was demonstrated, this invention is not restricted to this, For example, channel steel instead of H-section steel In any case, the same effects as the present invention can be achieved.

［実施の形態２］
次に、本発明の実施の形態２について説明する。
図３（ｂ）に示すように、本実施の形態２の梁部材用形鋼２００は、上フランジ１２および下フランジ１４と、これら上下フランジ１２、１４を連結するウェブ１６とを備える梁部材用のＨ形鋼（鉄骨梁）である。ウェブ１６には、設備用配管を挿通するための貫通孔１８が開けられている。 [Embodiment 2]
Next, a second embodiment of the present invention will be described.
As shown in FIG. 3 (b), the beam member shape steel 200 according to the second embodiment is for a beam member including an upper flange 12 and a lower flange 14, and a web 16 that connects the upper and lower flanges 12, 14. H-shaped steel (steel beam). The web 16 has a through hole 18 through which the facility pipe is inserted.

貫通孔１８は、図３（ａ）に示すように、ウェブ１６の一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部３０の蓋部分３２を打ち抜くことで、図３（ｂ）に示すように、ウェブ１６と直交する一方向に円筒状のフランジ３４を突出するように形成されている。   As shown in FIG. 3A, the through-hole 18 punches out the lid portion 32 of the projecting portion 30 formed by plastic working that plastically deforms a part of the web 16 into a covered cylindrical shape. As shown in FIG. 2, a cylindrical flange 34 is formed so as to protrude in one direction orthogonal to the web 16.

本実施の形態２の梁部材用形鋼２００によれば、ウェブ１６の板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔１８の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   According to the beam member shape steel 200 of the second embodiment, even if the increase in the thickness of the web 16 or the addition of a reinforcing member is omitted, the deformation of the through hole 18 when a shearing force is applied to the beam member. As a result, the cost can be reduced by reducing the number of members and the number of manufacturing steps. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

次に、本実施の形態２の貫通孔の形成方法について説明する。
まず、図３（ａ）に示す第一工程において、図示しない一対の円形のプレス金型をウェブ１６の両面に配置し、プレス加工（塑性加工）によってウェブ１６に有蓋円筒状の突出部３０を形成する。ここで、突出部３０の先端に形成する蓋部分３２は、貫通孔１８に相当する大きさでウェブ１６と平行な平面状に形成する。次に、図３（ｂ）に示す第二工程において、突出部３０の先端の蓋部分３２を円形に打ち抜き貫通孔１８を形成する。この第二工程については第一工程と同時に行ってもよい。すなわち、第一工程のプレス加工の際に有蓋円筒状の突出部３０を形成すると同時に蓋部分３２を打ち抜いてもよい。 Next, a method for forming a through hole according to the second embodiment will be described.
First, in the first step shown in FIG. 3A, a pair of circular press molds (not shown) are arranged on both surfaces of the web 16, and the covered cylindrical protrusion 30 is formed on the web 16 by press working (plastic working). Form. Here, the lid portion 32 formed at the tip of the protruding portion 30 is formed in a planar shape parallel to the web 16 with a size corresponding to the through hole 18. Next, in the second step shown in FIG. 3B, the through hole 18 is formed by punching the lid portion 32 at the tip of the protrusion 30 in a circular shape. You may perform this 2nd process simultaneously with a 1st process. That is, the lid portion 32 may be punched out simultaneously with the formation of the covered cylindrical protrusion 30 during the pressing process in the first step.

このように、ウェブ１６の一部を有蓋円筒状に塑性変形させるプレス加工によって形成した突出部３０の蓋部分３２を打ち抜くことで、ウェブ１６と直交する一方向にフランジ３４を突出するように形成して、貫通孔１８を形成することができる。形成されたフランジ３４が貫通孔１８を補強することで、貫通孔１８を設けたことによるウェブ１６のせん断耐力低下を抑制することができる。   Thus, the flange 34 is formed so as to protrude in one direction orthogonal to the web 16 by punching the cover portion 32 of the protrusion 30 formed by press working that plastically deforms a part of the web 16 into a covered cylinder. Thus, the through hole 18 can be formed. Since the formed flange 34 reinforces the through hole 18, a decrease in shear strength of the web 16 due to the provision of the through hole 18 can be suppressed.

本実施の形態２の貫通孔の形成方法によれば、ウェブ１６の板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔１８の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができるという効果を奏する。   According to the through hole forming method of the second embodiment, even if the increase in the thickness of the web 16 or the addition of a reinforcing member is omitted, the deformation of the through hole 18 when a shearing force is applied to the beam member is suppressed. As a result, the cost can be reduced by reducing the number of members and the number of manufacturing steps.

なお、本実施の形態２においては、梁部材用形鋼２００がＨ形鋼で構成される場合について説明したが、本発明はこれに限るものではなく、Ｈ形鋼の代わりに例えば溝形鋼で構成してもよく、いずれにしても本発明と同一の作用効果を奏することができる。   In addition, in this Embodiment 2, although the case where the beam member shape steel 200 was comprised with H-section steel was demonstrated, this invention is not restricted to this, For example, channel steel instead of H-section steel In any case, the same effects as the present invention can be achieved.

［実施の形態３］
次に、本発明の実施の形態３について説明する。
図４に示すように、本実施の形態３の梁部材用形鋼３００は、上記の実施の形態１または２において、貫通孔１８の内径寸法と略同じ外径寸法の円筒部材３６を貫通孔１８に挿通配置したものである。貫通孔１８に形成した円筒状のフランジ３８（上記の実施の形態１のフランジ２０、実施の形態２のフランジ３４に相当）と円筒部材３６は、フランジ３８に設けた固定用貫通穴４０に挿通した固定治具４２で固定してある。 [Embodiment 3]
Next, a third embodiment of the present invention will be described.
As shown in FIG. 4, the beam member shape steel 300 according to the third embodiment is similar to the first or second embodiment described above in that the cylindrical member 36 having an outer diameter substantially the same as the inner diameter of the through hole 18 is passed through the through hole. 18 is inserted and arranged. The cylindrical flange 38 formed in the through hole 18 (corresponding to the flange 20 of the first embodiment and the flange 34 of the second embodiment) and the cylindrical member 36 are inserted into the fixing through hole 40 provided in the flange 38. The fixing jig 42 is fixed.

ここで、円筒部材３６としては、その長さを上下フランジ１２、１４の幅以下の長さとし、その外形寸法を貫通孔１８の内径寸法と略同じにした鋼管で構成することができる。円筒部材３６の長さ方向の中心がウェブ１６の位置になるように配置する。固定用貫通穴４０の内面にねじを切ってボルトを固定治具４２として締め込み、このボルト先端の支圧で円筒部材３６を固定する。   Here, the cylindrical member 36 can be formed of a steel pipe whose length is equal to or less than the width of the upper and lower flanges 12 and 14 and whose outer dimension is substantially the same as the inner diameter dimension of the through hole 18. The cylindrical member 36 is arranged so that the center in the length direction is the position of the web 16. A screw is cut on the inner surface of the fixing through hole 40 and the bolt is tightened as a fixing jig 42, and the cylindrical member 36 is fixed by a support pressure at the tip of the bolt.

なお、これに加えて、円筒部材３６において、固定用貫通穴４０に対応する位置に貫通穴を形成し、この貫通穴とフランジ３８の固定用貫通穴４０とにボルトナット、ねじ、かしめリベットなどの機械的固定手段を挿通して互いを固定してもよい。このようにすれば、フランジ３８と円筒部材３６の固定を容易に行うことができる。また、補強効果を高めるために、固定用貫通穴４０による固定箇所を増やして強固に固定してもよい。   In addition, in the cylindrical member 36, a through hole is formed at a position corresponding to the fixing through hole 40, and a bolt nut, a screw, a caulking rivet or the like is formed in the through hole and the fixing through hole 40 of the flange 38. These mechanical fixing means may be inserted to fix each other. In this way, the flange 38 and the cylindrical member 36 can be easily fixed. Further, in order to enhance the reinforcing effect, the number of fixing points by the fixing through holes 40 may be increased and fixed firmly.

本実施の形態３の梁部材用形鋼３００によれば、上記の実施の形態１または２に記載の効果に加え、フランジ３８と円筒部材３６とを容易に固定することができるという効果を奏する。また、貫通孔１８に挿通固定した円筒部材３６によって、梁部材に対する耐火被覆工事の際に貫通孔１８を適正な形状に保持することができる。これによれば、耐火被覆材を吹き付けてもウェブ１６の貫通孔１８は所定の寸法を維持するので、後工程において貫通孔１８に配管類を挿通する配管工事の作業管理が容易となる。   According to the beam member shape steel 300 of the third embodiment, in addition to the effects described in the first or second embodiment, the flange 38 and the cylindrical member 36 can be easily fixed. . In addition, the cylindrical member 36 inserted and fixed in the through hole 18 can hold the through hole 18 in an appropriate shape during the fireproof coating work on the beam member. According to this, since the through-hole 18 of the web 16 maintains a predetermined dimension even if the fireproof coating material is sprayed, work management of piping work for inserting piping into the through-hole 18 in the subsequent process becomes easy.

なお、円筒部材３６としては例えば薄鋼管を用いることができるが、不燃材であればこれに限るものではなく、例えば窯業系材料など任意の材料を用いて構成してもよい。さらに、円筒部材３６を厚肉化または高強度化してフランジ３８に接合固定すれば、貫通孔１８の強度をより高めることができる。   For example, a thin steel pipe can be used as the cylindrical member 36, but the cylindrical member 36 is not limited to this as long as it is a non-combustible material, and may be configured using any material such as a ceramic material. Furthermore, if the cylindrical member 36 is thickened or strengthened and joined and fixed to the flange 38, the strength of the through hole 18 can be further increased.

［実施の形態４］
次に、本発明の実施の形態４について説明する。
図５に示すように、本実施の形態４の梁部材用形鋼４００は、上記の実施の形態１または２において、貫通孔１８の内径寸法と略同じ外径寸法の円筒部材４４を貫通孔１８に挿通配置し、貫通孔１８に形成したフランジ４６（上記の実施の形態１のフランジ２０、実施の形態２のフランジ３４に相当）と円筒部材４４とを、フランジ４６の内周面および円筒部材４４の外周面にそれぞれ形成したねじ溝４６Ａ、４４Ａ（溝）同士を螺合して固定したものである。 [Embodiment 4]
Next, a fourth embodiment of the present invention will be described.
As shown in FIG. 5, the beam member shape steel 400 according to the fourth embodiment is similar to the first or second embodiment described above in that the cylindrical member 44 having an outer diameter substantially the same as the inner diameter of the through-hole 18 is passed through the through-hole. The flange 46 (corresponding to the flange 20 of the first embodiment and the flange 34 of the second embodiment) formed in the through hole 18 and the cylindrical member 44 are connected to the inner peripheral surface of the flange 46 and the cylinder. Screw grooves 46A and 44A (grooves) formed on the outer peripheral surface of the member 44 are screwed together and fixed.

円筒部材４４は、その外周面において、少なくとも長さの半分程度までねじ溝４４Ａが形成されており、バーリング加工によって形成したフランジ４６の内周面に形成されたねじ溝４６Ａと螺合している。ねじ溝４４Ａ、４６Ａを円筒部材４４の長さの半分程度としたことで、ねじを締め込んだ状態で円筒部材４４をフランジ４６の所定の位置に位置決め管理することができる。   The cylindrical member 44 has a thread groove 44A formed at least about half of its length on the outer peripheral surface thereof, and is screwed with a thread groove 46A formed on the inner peripheral surface of the flange 46 formed by burring. . By setting the thread grooves 44A and 46A to about half the length of the cylindrical member 44, the cylindrical member 44 can be positioned and managed at a predetermined position of the flange 46 with the screw tightened.

本実施の形態４の梁部材用形鋼４００によれば、上記の実施の形態１または２に記載の効果に加え、互いの周面に形成したねじ溝４４Ａ、４６Ａ同士を螺合することでフランジ４６と円筒部材４４とをより容易に取り付け固定できるとともに、強固な補強構造を簡単に得ることができる。   According to the beam member shape steel 400 of the fourth embodiment, in addition to the effects described in the first or second embodiment, the screw grooves 44A and 46A formed on the peripheral surfaces of the beam members are screwed together. The flange 46 and the cylindrical member 44 can be attached and fixed more easily, and a strong reinforcing structure can be easily obtained.

なお、上記の実施の形態４において、ねじ溝４４Ａ、４６Ａを形成する代わりに、円筒部材４４の長さ方向に延在する溝を周方向に複数形成してもよい。この場合、円筒部材４４の外周面およびフランジ４６の内周面は長さ方向視で凹凸状の形状を呈する。互いの周面に形成した溝同士を噛み合わせることでフランジ４６と円筒部材４４とをより容易に取り付け固定できるとともに、強固な補強構造を簡単に得ることができる。なお、この溝は例えばプレス加工等によって形成することが可能である。   In the fourth embodiment, instead of forming the screw grooves 44A and 46A, a plurality of grooves extending in the length direction of the cylindrical member 44 may be formed in the circumferential direction. In this case, the outer peripheral surface of the cylindrical member 44 and the inner peripheral surface of the flange 46 have an uneven shape when viewed in the length direction. By engaging the grooves formed on the peripheral surfaces of each other, the flange 46 and the cylindrical member 44 can be attached and fixed more easily, and a strong reinforcing structure can be easily obtained. In addition, this groove | channel can be formed by press work etc., for example.

［実施の形態５］
次に、本発明の実施の形態５について説明する。
図６に示すように、本実施の形態５の梁部材用形鋼５００は、上記の実施の形態１または２において、貫通孔１８の内径寸法と略同じ外径寸法の円筒部材４８を貫通孔１８に挿通配置し、円筒部材４８の先端（端部）の全周を径方向外側に折り返して形成したキャップ部４８Ａ（爪状部）を、貫通孔１８に形成したフランジ５０（上記の実施の形態１のフランジ２０、実施の形態２のフランジ３４に相当）の先端５０Ａに嵌合したものである。 [Embodiment 5]
Next, a fifth embodiment of the present invention will be described.
As shown in FIG. 6, the beam member shape steel 500 of the fifth embodiment is similar to the first or second embodiment described above in that the cylindrical member 48 having an outer diameter substantially the same as the inner diameter of the through hole 18 is passed through the through hole. 18, and a cap portion 48 </ b> A (claw-like portion) formed by folding the entire circumference of the tip end (end portion) of the cylindrical member 48 outward in the radial direction is formed into a flange 50 (the above-described embodiment). It is fitted to the tip 50A of the flange 20 of the first embodiment and the flange 34 of the second embodiment.

本実施の形態５の梁部材用形鋼５００によれば、上記の実施の形態１または２に記載の効果に加え、貫通孔１８に挿通配置する円筒部材４８のフランジ５０への位置決め固定が容易になるという効果を奏する。   According to the beam member shape steel 500 of the fifth embodiment, in addition to the effects described in the first or second embodiment, it is easy to position and fix the cylindrical member 48 inserted into the through hole 18 to the flange 50. Has the effect of becoming.

キャップ部４８Ａは、プレス加工によって円筒部材４８の先端に一体に形成してもよいし、別部材を接合して形成してもよい。なお、キャップ部４８Ａをフランジ５０の先端５０Ａに嵌め込んで、このキャップ部４８Ａとフランジ５０を鋼材のスプリングバックを利用して嵌合可能な態様とするとさらによい。   The cap portion 48A may be formed integrally with the tip of the cylindrical member 48 by pressing, or may be formed by joining another member. It is further preferable that the cap portion 48A is fitted into the tip 50A of the flange 50 so that the cap portion 48A and the flange 50 can be fitted using a spring back made of steel.

また、本実施の形態５を上記の実施の形態３や４の構成に適用することもできる。すなわち、上記の実施の形態３において、フランジ３８の固定用貫通穴４０に挿通した固定治具４２で円筒部材３６を固定するとともに、円筒部材３６の先端に形成したキャップ部をフランジ３８の先端に嵌合してもよい。また、上記の実施の形態４において、ねじ溝同士でフランジ４６と円筒部材４４を螺合するとともに、円筒部材４４の先端に形成したキャップ部をフランジ４６の先端に嵌合してもよい。このようにしても、本発明と同一の作用効果を奏することができる。   The fifth embodiment can also be applied to the configurations of the third and fourth embodiments. That is, in the third embodiment, the cylindrical member 36 is fixed by the fixing jig 42 inserted through the fixing through hole 40 of the flange 38, and the cap portion formed at the tip of the cylindrical member 36 is attached to the tip of the flange 38. You may fit. In the above-described fourth embodiment, the flange 46 and the cylindrical member 44 may be screwed together with the thread grooves, and a cap portion formed at the tip of the cylindrical member 44 may be fitted to the tip of the flange 46. Even if it does in this way, there can exist the same effect as this invention.

なお、本実施の形態５においては、キャップ部４８Ａ（爪状部）が円筒部材４８の先端に形成される場合について説明したが、本発明はこれに限るものではなく、円筒部材４８の先端以外の外周面に形成した爪状部をフランジ５０の先端５０Ａに嵌合してもよく、このようにしても本発明と同一の作用効果を奏することができる。   In the fifth embodiment, the case where the cap portion 48A (claw-like portion) is formed at the tip of the cylindrical member 48 has been described. However, the present invention is not limited to this, and other than the tip of the cylindrical member 48. A claw-like portion formed on the outer peripheral surface of the flange 50 may be fitted to the tip 50A of the flange 50, and in this way, the same effect as the present invention can be achieved.

次に、本発明の実施例について説明する。   Next, examples of the present invention will be described.

［実施例１］
まず、本発明の実施例１について説明する。本実施例１は上記の実施の形態１に対応したものである。 [Example 1]
First, Example 1 of the present invention will be described. Example 1 corresponds to Embodiment 1 described above.

図１に示すように、本実施例１の梁部材用形鋼１００は、上フランジ１２および下フランジ１４と、これら上下フランジ１２、１４を連結するウェブ１６とを備える梁部材用のＨ形鋼（鉄骨梁）である。ウェブ１６には貫通孔１８が開けられており、この貫通孔１８は、ウェブ１６に設けた開口の周囲を円筒状に塑性変形させる塑性加工により、円筒状のフランジ２０を突出するように形成されている。   As shown in FIG. 1, a beam member shape steel 100 according to the first embodiment includes an upper flange 12 and a lower flange 14 and a web member 16 for connecting the upper and lower flanges 12 and 14. (Steel beam). A through-hole 18 is formed in the web 16, and the through-hole 18 is formed so as to project the cylindrical flange 20 by plastic working that plastically deforms the periphery of the opening provided in the web 16 into a cylindrical shape. ing.

本実施例１の梁部材のサイズは、Ｈ−２５０×１００×４．５×４．５である。貫通孔１８は、内径１２５ｍｍの円形であり、貫通孔１８の全周に形成されるフランジ２０の高さは６２．５ｍｍである。このフランジ２０は、後述するバーリング加工を行ったことにより、厚みが最大３０％程度薄くなっている。   The size of the beam member of Example 1 is H-250 × 100 × 4.5 × 4.5. The through hole 18 has a circular shape with an inner diameter of 125 mm, and the height of the flange 20 formed on the entire circumference of the through hole 18 is 62.5 mm. The flange 20 is thinned by about 30% at the maximum due to the burring process described later.

本実施例１の貫通孔の形成方法について説明する。
まず、図２（ａ）に示す第一工程において、貫通孔１８の先孔として、パンチングで直径６２．５ｍｍの円形の開口２２をウェブ１６に設ける。次いで、図２（ｂ）に示す第二工程において、フランジ２０を突出させる側に凹型の金型２６を配置し、その反対側から凸型の金型２８を回転させながら開口２２に押し付けて凹型の金型２６の凹部２４に挿し入れ、開口２２の周囲を円筒状に塑性変形させるバーリング加工（塑性加工）を行う。ここで、凹型の金型２６と凸型の金型２８は、ウェブ１６の板厚に応じた必要なクリアランスをとっている。最後に、図２（ｃ）に示すように、フランジ２０の立ち上がり加工を行う。 A method for forming a through hole according to the first embodiment will be described.
First, in the first step shown in FIG. 2A, a circular opening 22 having a diameter of 62.5 mm is provided in the web 16 as a leading hole of the through hole 18 by punching. Next, in the second step shown in FIG. 2B, a concave mold 26 is disposed on the side from which the flange 20 projects, and the concave mold 28 is pressed against the opening 22 while rotating the convex mold 28 from the opposite side. A burring process (plastic process) is performed in which the periphery of the opening 22 is plastically deformed into a cylindrical shape. Here, the concave mold 26 and the convex mold 28 have a necessary clearance according to the thickness of the web 16. Finally, as shown in FIG. 2C, the rising process of the flange 20 is performed.

このようにすることで、先孔である開口２２の内径を拡径するとともに、その全周にわたってウェブ１６と直交する一方向にフランジ２０を突出するように形成して、貫通孔１８を形成することができる。形成されたフランジ２０が貫通孔１８を補強することで、貫通孔１８を設けたことによるウェブ１６のせん断耐力低下を抑制することができる。   By doing in this way, while expanding the internal diameter of the opening 22 which is a tip hole, it forms so that the flange 20 may protrude in one direction orthogonal to the web 16 over the perimeter, and the through-hole 18 is formed. be able to. Since the formed flange 20 reinforces the through hole 18, a decrease in shear strength of the web 16 due to the provision of the through hole 18 can be suppressed.

なお、図２（ｂ）に示す第二工程におけるフランジ２０の突出長はおよそ３０ｍｍであるが、これは、開口２２の先孔径と貫通孔１８の仕上げ開口径に応じて、任意に選択することができる。すなわち、仕上げ開口径とフランジ２０の必要突出長から先孔径を決定すればよく、その条件は、先孔径を最終的に得たい貫通孔１８の仕上げ開口径の例えば１／２．５より大きくすることである。先孔径と仕上げ開口径の比率が大きい場合、フランジ２０先端のゆがみや亀裂が発生するおそれがあるが、その部分は切断して仕上げるようにしてもよい。   In addition, although the protrusion length of the flange 20 in the 2nd process shown in FIG.2 (b) is about 30 mm, this is selected arbitrarily according to the front hole diameter of the opening 22, and the finishing opening diameter of the through-hole 18. FIG. Can do. In other words, the tip hole diameter may be determined from the finished opening diameter and the required protrusion length of the flange 20, and the condition is that the tip hole diameter is made larger than, for example, 1 / 2.5 of the finished opening diameter of the through hole 18 to be finally obtained. That is. When the ratio between the tip hole diameter and the finished opening diameter is large, there is a possibility that the front end of the flange 20 may be distorted or cracked, but that part may be cut and finished.

［実施例２］
次に、本発明の実施例２について説明する。本実施例２は上記の実施の形態２に対応したものである。 [Example 2]
Next, a second embodiment of the present invention will be described. Example 2 corresponds to the second embodiment.

図３（ｂ）に示すように、本実施例２の梁部材用形鋼２００は、上フランジ１２および下フランジ１４と、これら上下フランジ１２、１４を連結するウェブ１６とを備える梁部材用のＨ形鋼（鉄骨梁）である。ウェブ１６には貫通孔１８が開けられており、この貫通孔１８は、円筒状のフランジ３４を突出するように形成されている。   As shown in FIG. 3 (b), the beam member shape steel 200 of the second embodiment is for a beam member including an upper flange 12 and a lower flange 14, and a web 16 connecting the upper and lower flanges 12 and 14. H-shaped steel (steel beam). A through hole 18 is formed in the web 16, and the through hole 18 is formed so as to project a cylindrical flange 34.

本実施例２の梁部材のサイズは、上記の実施例１と同じとしている。貫通孔１８は、内径１２５ｍｍの円形であり、貫通孔１８の全周に形成されるフランジ３４の高さは６２．５ｍｍである。   The size of the beam member of the second embodiment is the same as that of the first embodiment. The through hole 18 is circular with an inner diameter of 125 mm, and the height of the flange 34 formed on the entire circumference of the through hole 18 is 62.5 mm.

本実施例２の貫通孔の形成方法について説明する。
まず、図３（ａ）に示す第一工程において、図示しない一対の円形のプレス金型をウェブ１６の両面に配置し、プレス加工（塑性加工）によってウェブ１６に有蓋円筒状の突出部３０を形成する。ここで、突出部３０の先端に形成する蓋部分３２は、貫通孔１８に相当する大きさでウェブ１６と平行な平面状に形成する。次に、図３（ｂ）に示す第二工程において、突出部３０の先端の蓋部分３２を円形に打ち抜き貫通孔１８を形成する。この第二工程については第一工程と同時に行ってもよい。 A method for forming a through hole according to the second embodiment will be described.
First, in the first step shown in FIG. 3A, a pair of circular press molds (not shown) are arranged on both surfaces of the web 16, and the covered cylindrical protrusion 30 is formed on the web 16 by press working (plastic working). Form. Here, the lid portion 32 formed at the tip of the protruding portion 30 is formed in a planar shape parallel to the web 16 with a size corresponding to the through hole 18. Next, in the second step shown in FIG. 3B, the through hole 18 is formed by punching the lid portion 32 at the tip of the protrusion 30 in a circular shape. You may perform this 2nd process simultaneously with a 1st process.

このように、ウェブ１６の一部を有蓋円筒状に塑性変形させるプレス加工によって形成した突出部３０の蓋部分３２を打ち抜くことで、ウェブ１６と直交する一方向にフランジ３４を突出するように形成して、貫通孔１８を形成することができる。形成されたフランジ３４が貫通孔１８を補強することで、貫通孔１８を設けたことによるウェブ１６のせん断耐力低下を抑制することができる。   Thus, the flange 34 is formed so as to protrude in one direction orthogonal to the web 16 by punching the cover portion 32 of the protrusion 30 formed by press working that plastically deforms a part of the web 16 into a covered cylinder. Thus, the through hole 18 can be formed. Since the formed flange 34 reinforces the through hole 18, a decrease in shear strength of the web 16 due to the provision of the through hole 18 can be suppressed.

梁部材を構成する鋼材としては、例えばｒ値＝１．２、λ＝８０％を有する深絞り性および伸びフランジ性に優れた高強度溶接亜鉛めっき鋼板を使用することができる。こうした鋼材を使用すれば、フランジ３４の突出長を、梁部材の上下フランジ１２、１４の片側の突出長と同じ５０ｍｍ程度にすることが可能である。   As the steel material constituting the beam member, for example, a high-strength welded galvanized steel sheet having an r value = 1.2 and λ = 80% and excellent in deep drawability and stretch flangeability can be used. If such a steel material is used, the protruding length of the flange 34 can be set to about 50 mm which is the same as the protruding length of one side of the upper and lower flanges 12 and 14 of the beam member.

［実施例３］
次に、本発明の実施例３について説明する。本実施例３は上記の実施の形態３に対応したものである。 [Example 3]
Next, Embodiment 3 of the present invention will be described. Example 3 corresponds to Embodiment 3 described above.

図４に示すように、本実施例３の梁部材用形鋼３００は、上記の実施例１または２において、貫通孔１８の内径寸法と略同じ外径寸法の円筒部材３６を貫通孔１８に挿通配置したものである。貫通孔１８に形成した円筒状のフランジ３８と円筒部材３６は、フランジ３８に設けた固定用貫通穴４０に挿通した固定治具４２で固定してある。   As shown in FIG. 4, the beam member shape steel 300 according to the third embodiment has the cylindrical member 36 having the same outer diameter as the through hole 18 in the first or second embodiment. It is inserted and arranged. The cylindrical flange 38 and the cylindrical member 36 formed in the through hole 18 are fixed by a fixing jig 42 inserted through a fixing through hole 40 provided in the flange 38.

円筒部材３６は、外形１２５ｍｍで、長さは１００ｍｍ、板厚２．３ｍｍの鋼管である。固定用貫通穴４０は、フランジ３８の先端から１５ｍｍの位置の上下２箇所に設けた開口径φ５ｍｍの穴であり、この穴の内面にねじを切ってＭ５のボルトを固定治具４２として締め込み、このボルト先端の支圧で円筒部材３６を固定する。   The cylindrical member 36 is a steel pipe having an outer shape of 125 mm, a length of 100 mm, and a plate thickness of 2.3 mm. The fixing through hole 40 is a hole having an opening diameter of φ5 mm provided at two upper and lower positions 15 mm from the tip of the flange 38. A screw is cut into the inner surface of the hole and an M5 bolt is tightened as a fixing jig 42. The cylindrical member 36 is fixed by the support pressure at the bolt tip.

なお、これに加えて、円筒部材３６において、固定用貫通穴４０に対応する位置に貫通穴を形成し、この貫通穴とフランジ３８の固定用貫通穴４０とにボルトナット、ねじ、かしめリベットなどの機械的固定手段を挿通して互いを固定してもよい。このようにすれば、フランジ３８と円筒部材３６の固定を容易に行うことができる。また、補強効果を高めるために、固定用貫通穴４０による固定箇所を増やして強固に固定してもよい。   In addition, in the cylindrical member 36, a through hole is formed at a position corresponding to the fixing through hole 40, and a bolt nut, a screw, a caulking rivet or the like is formed in the through hole and the fixing through hole 40 of the flange 38. These mechanical fixing means may be inserted to fix each other. In this way, the flange 38 and the cylindrical member 36 can be easily fixed. Further, in order to enhance the reinforcing effect, the number of fixing points by the fixing through holes 40 may be increased and fixed firmly.

本実施例３の梁部材用形鋼３００によれば、上記の実施例１または２に記載の効果に加え、フランジ３８と円筒部材３６とを容易に固定することができるという効果を奏する。また、貫通孔１８に挿通固定した円筒部材３６によって、梁部材に対する耐火被覆工事の際に貫通孔１８を適正な形状に保持することができる。これによれば、耐火被覆材を吹き付けてもウェブ１６の貫通孔１８は所定の寸法を維持するので、後工程において貫通孔１８に配管類を挿通する配管工事の作業管理が容易となる。   According to the beam member shape steel 300 of the third embodiment, in addition to the effects described in the first or second embodiment, the flange 38 and the cylindrical member 36 can be easily fixed. In addition, the cylindrical member 36 inserted and fixed in the through hole 18 can hold the through hole 18 in an appropriate shape during the fireproof coating work on the beam member. According to this, since the through-hole 18 of the web 16 maintains a predetermined dimension even if the fireproof coating material is sprayed, work management of piping work for inserting piping into the through-hole 18 in the subsequent process becomes easy.

以上説明したように、本発明に係る梁部材用形鋼によれば、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成されるので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができる。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   As described above, according to the structural member for a beam member according to the present invention, a structural member for a beam member that includes an upper and lower flange and a web that connects the upper and lower flanges and has a through hole formed therein. The through-hole is formed so as to expand the inner diameter of the opening and project the flange in one direction orthogonal to the web by plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape. Therefore, even if the increase in web plate thickness and the addition of reinforcing members are omitted, deformation of the through-holes when shearing force acts on the beam members can be suppressed. As a result, the number of members can be reduced and the number of manufacturing steps can be reduced. The cost can be reduced by reducing the cost. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

また、本発明に係る他の梁部材用形鋼によれば、上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、前記貫通孔は、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成されるので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができる。したがって、補強部材を用いたりウェブを増厚することなく、貫通孔の補強が可能な低コストの梁部材用形鋼を提供することができる。また、この貫通孔は、溶接や特殊な現場加工をすることなく容易に補強部材を取り付け可能な構造であることから、工場や建設現場で補強部材を貫通孔に取り付けることで、この部分の強度をさらに向上することもできる。   Further, according to another structural member for a beam member according to the present invention, the structural member for a beam member comprising an upper and lower flange and a web that connects the upper and lower flanges and has a through hole formed therein. Since the hole is formed so as to project the flange in one direction orthogonal to the web by punching out the lid portion of the projecting portion formed by plastic processing that plastically deforms a part of the web into a covered cylinder, Even if the increase in web plate thickness and the addition of reinforcing members are omitted, deformation of the through-hole when shearing force is applied to the beam member can be suppressed. As a result, the number of members and the number of manufacturing steps can be reduced. Cost reduction can be achieved. Therefore, it is possible to provide a low-cost beam member for a beam member that can reinforce the through hole without using a reinforcing member or increasing the thickness of the web. In addition, since this through hole has a structure that can easily attach a reinforcing member without welding or special on-site processing, the strength of this part can be increased by attaching the reinforcing member to the through hole at a factory or construction site. Can be further improved.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジに設けた固定用貫通穴に挿通した固定治具で固定したので、フランジと円筒部材とを容易に固定することができる。また、貫通孔に挿通配置した円筒部材によって、梁部材に対する耐火被覆工事の際に貫通孔の形状を保持することができる。さらに、円筒部材を厚肉化および高強度化してフランジに接合固定すれば、貫通孔の強度をより高めることができる。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter dimension substantially the same as the inner diameter dimension of the through hole is inserted and disposed in the through hole, and the flange formed in the through hole; Since the cylindrical member is fixed by the fixing jig inserted through the fixing through hole provided in the flange, the flange and the cylindrical member can be easily fixed. Moreover, the shape of the through hole can be maintained during the fireproof coating work for the beam member by the cylindrical member inserted and disposed in the through hole. Furthermore, if the cylindrical member is increased in thickness and strength and is fixedly bonded to the flange, the strength of the through hole can be further increased.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジの内面および前記円筒部材の外面にそれぞれ形成した溝同士を係合して固定したので、フランジと円筒部材とをより容易に固定することができる。特に、溝同士を係合することで簡単に強固な補強構造を得ることができる。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter dimension substantially the same as the inner diameter dimension of the through hole is inserted and disposed in the through hole, and the flange formed in the through hole; Since the cylindrical member is fixed by engaging grooves formed on the inner surface of the flange and the outer surface of the cylindrical member, the flange and the cylindrical member can be more easily fixed. In particular, a strong reinforcing structure can be easily obtained by engaging the grooves.

また、本発明に係る他の梁部材用形鋼によれば、前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記円筒部材の外面または端部に設けた爪状部を、前記貫通孔に形成した前記フランジの先端に嵌合したので、貫通孔に挿通配置する円筒部材の位置決め固定が容易になる。   Further, according to another structural member for a beam member according to the present invention, a cylindrical member having an outer diameter that is substantially the same as the inner diameter of the through hole is inserted and disposed in the through hole, and the outer surface or the end of the cylindrical member is disposed. Since the provided claw-like portion is fitted to the tip of the flange formed in the through hole, positioning and fixing of the cylindrical member inserted and arranged in the through hole is facilitated.

また、本発明に係る貫通孔の形成方法によれば、上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成するので、ウェブ板厚の増大や補強部材の付加を省略しても、梁部材にせん断力が作用した際の貫通孔の変形を抑制することができ、この結果、部材数の削減や製作工数の削減によるコスト低減を図ることができる。   Moreover, according to the formation method of the through-hole which concerns on this invention, It is a method of forming a through-hole with respect to the said web of the shape steel for beam members provided with an upper and lower flange and the web which connects this upper and lower flange. The opening of the web is plastically deformed in a cylindrical shape around the opening, the inside diameter of the opening is increased, and a flange is protruded in one direction perpendicular to the web. Since the hole is formed, even if the increase in the web plate thickness or the addition of the reinforcing member is omitted, the deformation of the through-hole when the shearing force is applied to the beam member can be suppressed. As a result, the number of members can be reduced. And cost reduction by reducing production man-hours.

以上のように、本発明に係る梁部材用形鋼および貫通孔の形成方法は、建築構造物の設備用配管を挿通するための貫通孔が開けられた梁部材用形鋼に有用であり、特に、補強部材を用いたり、ウェブを増厚することなく、貫通孔を低コストに補強するのに適している。   As described above, the beam member shape steel and the method of forming a through hole according to the present invention are useful for a beam member shape steel in which a through hole for inserting a facility pipe of a building structure is opened, In particular, it is suitable for reinforcing the through-holes at low cost without using a reinforcing member or increasing the thickness of the web.

１００，２００，３００，４００，５００ 梁部材用形鋼
１２ 上フランジ
１４ 下フランジ
１６ ウェブ
１８ 貫通孔
２０，３４，３８，４６，５０ フランジ
２２ 開口
２４ 凹部
２６，２８ 金型
３０ 突出部
３２ 蓋部分
３６，４４，４８ 円筒部材
４０ 固定用貫通穴
４２ 固定治具
４４Ａ，４６Ａ ねじ溝（溝）
４８Ａ キャップ部（爪状部）
５０Ａ 先端 100, 200, 300, 400, 500 Steel for beam member 12 Upper flange 14 Lower flange 16 Web 18 Through hole 20, 34, 38, 46, 50 Flange 22 Opening 24 Recess 26, 28 Mold 30 Protruding part 32 Lid part 36, 44, 48 Cylindrical member 40 Fixing through hole 42 Fixing jig 44A, 46A Thread groove (groove)
48A Cap part (claw-shaped part)
50A tip

Claims (7)

上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、
前記貫通孔は、前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成されることを特徴とする梁部材用形鋼。 A structural member for a beam member comprising an upper and lower flange and a web having a through hole connected to the upper and lower flange,
The through-hole is formed so as to expand the inner diameter of the opening and project the flange in one direction orthogonal to the web by plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape. Shaped steel for beam members. 上下フランジと、この上下フランジを連結し、貫通孔が開けられたウェブとを備える梁部材用の形鋼であって、
前記貫通孔は、前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成されることを特徴とする梁部材用形鋼。 A structural member for a beam member comprising an upper and lower flange and a web having a through hole connected to the upper and lower flange,
The through-hole is formed so as to project a flange in one direction orthogonal to the web by punching out a lid portion of a projecting portion formed by plastic working that plastically deforms a part of the web into a covered cylinder. Shaped steel for beam members. 前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジに設けた固定用貫通穴に挿通した固定治具で固定したことを特徴とする請求項１または２に記載の梁部材用形鋼。   A cylindrical member having an outer diameter that is substantially the same as the inner diameter of the through hole is inserted into the through hole, and the flange formed in the through hole and the cylindrical member are inserted into a fixing through hole provided in the flange. The shape member for a beam member according to claim 1 or 2, characterized by being fixed by a fixed jig. 前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記貫通孔に形成した前記フランジと前記円筒部材とを、前記フランジの内面および前記円筒部材の外面にそれぞれ形成した溝同士を係合して固定したことを特徴とする請求項１〜３のいずれか一つに記載の梁部材用形鋼。   A cylindrical member having an outer diameter approximately the same as the inner diameter of the through hole is inserted into the through hole, and the flange and the cylindrical member formed in the through hole are placed on the inner surface of the flange and the outer surface of the cylindrical member. The shaped steel for a beam member according to any one of claims 1 to 3, wherein grooves formed respectively are engaged and fixed. 前記貫通孔の内径寸法と略同じ外径寸法の円筒部材を前記貫通孔に挿通配置し、前記円筒部材の外面または端部に設けた爪状部を、前記貫通孔に形成した前記フランジの先端に嵌合したことを特徴とする請求項１〜４のいずれか一つに記載の梁部材用形鋼。   A cylindrical member having an outer diameter that is substantially the same as the inner diameter of the through hole is inserted into the through hole, and a claw-like portion provided on the outer surface or end of the cylindrical member is formed at the tip of the flange. The beam member for a beam member according to any one of claims 1 to 4, wherein the beam member is fitted to the beam member. 上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、
前記ウェブに設けた開口の周囲を円筒状に塑性変形させる塑性加工により、前記開口の内径を拡径するとともに、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成することを特徴とする貫通孔の形成方法。 A method of forming a through-hole for the web of a structural member for a beam member comprising an upper and lower flange and a web connecting the upper and lower flanges,
The through hole is formed by expanding the inner diameter of the opening and projecting a flange in one direction perpendicular to the web by plastic working that plastically deforms the periphery of the opening provided in the web into a cylindrical shape. Forming a through hole. 上下フランジと、この上下フランジを連結するウェブとを備える梁部材用の形鋼の前記ウェブに対して貫通孔を形成する方法であって、
前記ウェブの一部を有蓋円筒状に塑性変形させる塑性加工によって形成した突出部の蓋部分を打ち抜くことで、前記ウェブと直交する一方向にフランジを突出するように形成して、前記貫通孔を形成することを特徴とする貫通孔の形成方法。 A method of forming a through-hole for the web of a structural member for a beam member comprising an upper and lower flange and a web connecting the upper and lower flanges,
By punching out the lid portion of the projecting portion formed by plastic processing that plastically deforms a part of the web into a covered cylinder, the through hole is formed so as to project a flange in one direction orthogonal to the web. A method for forming a through hole, comprising: forming the through hole.
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JP2019123011A (en) * 2018-01-11 2019-07-25 株式会社神戸製鋼所 Joined body and method for manufacturing same

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JPS5014215U (en) * 1973-05-31 1975-02-14
JPS6041689U (en) * 1983-08-31 1985-03-23 株式会社　長谷川工務店 Installation structure of sleeve to beam steel frame
JPH08500652A (en) * 1992-09-02 1996-01-23 アーネスト ロバート ボドナー Roll-formed metal member with dents for reinforcement
JP2000297498A (en) * 1999-04-13 2000-10-24 Oyo Kikaku:Kk Shape steel
JP2007162243A (en) * 2005-12-09 2007-06-28 Okabe Co Ltd Member and structure for reinforcing through-hole of steel beam
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JPS5014215U (en) * 1973-05-31 1975-02-14
JPS6041689U (en) * 1983-08-31 1985-03-23 株式会社　長谷川工務店 Installation structure of sleeve to beam steel frame
JPH08500652A (en) * 1992-09-02 1996-01-23 アーネスト ロバート ボドナー Roll-formed metal member with dents for reinforcement
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JP2016069839A (en) * 2014-09-29 2016-05-09 新日鐵住金株式会社 Connection column

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JP2019123011A (en) * 2018-01-11 2019-07-25 株式会社神戸製鋼所 Joined body and method for manufacturing same
US11433450B2 (en) 2018-01-11 2022-09-06 Kobe Steel, Ltd. Joined body and method for manufacturing same

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