JP7703321B2

JP7703321B2 - Roof structure

Info

Publication number: JP7703321B2
Application number: JP2020217166A
Authority: JP
Inventors: 哲二郎亀田; 彰野呂; 梨絵吉浦; 大地畠山
Original assignee: JFE Civil Engineering and Construction Corp
Current assignee: JFE Civil Engineering and Construction Corp
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2025-07-07
Anticipated expiration: 2040-12-25
Also published as: JP2022102437A

Description

本発明は、長手方向の端部で隣接する一対の構造梁を連結した連続構造梁を使用した屋根構造に関する。 The present invention relates to a roof structure using a continuous structural beam in which a pair of adjacent structural beams are connected at their longitudinal ends.

鉄骨造の建築物の屋根構造は、複数の柱上部に形鋼からなる複数の主梁が平行に連結され、複数の主梁上に、形鋼からなる複数の小梁（構造梁）が主梁に交差して平行に連結され、小梁上に複数の屋根材を並べて連結することで屋根が形成されている。
従来の小梁は、主梁間に長手方向の両端が連結される単純梁として配置されていた。屋根材には、自重とともに暴風時の風荷重が鉛直方向に作用するので、単純梁として配置された小梁の長手方向中央には、風荷重によって大きな曲げモーメントが作用する。このため、従来の小梁は、大きな曲げモーメントが作用しても変形量が抑制できるような大断面の形鋼が必要であった。 The roof structure of a steel-framed building is formed by connecting multiple main beams made of structural steel in parallel to the tops of multiple columns, connecting multiple secondary beams (structural beams) made of structural steel in parallel to the main beams and crossing them, and then arranging and connecting multiple roofing materials on the secondary beams to form the roof.
Conventional small beams are arranged as simple beams with both ends connected in the longitudinal direction between the main beams. Since the roof material is subjected to the vertical wind load during a storm as well as its own weight, a large bending moment is applied to the longitudinal center of the small beam arranged as a simple beam due to the wind load. For this reason, conventional small beams required large cross-section steel that could suppress the amount of deformation even when a large bending moment was applied.

そこで、長手方向の端部で隣接する１対の小梁の端部同士を、連結部材を介して連結することで、風荷重による曲げモーメントが作用しても小さな小梁断面で変形量を抑制し、経済性を向上させる技術が提案されている（例えば特許文献１）。
特許文献１の構造は、主梁上に受部材が固定され、この受部材の立ち上がり部に、長手方向の端部で隣接する一対の小梁の端部と連結部材とが２本のボルトで固定されているとともに、連結部材の一部が一対の小梁の一部に、上部又は下部のどちらか一方の水平方向の面接触状態で当接している。 Therefore, a technology has been proposed in which the ends of a pair of adjacent sub-beams at their longitudinal ends are connected via a connecting member, thereby suppressing the amount of deformation due to the small cross-section of the sub-beams even when a bending moment due to wind load acts on them, thereby improving cost-effectiveness (for example, Patent Document 1).
In the structure of Patent Document 1, a support member is fixed onto the main beam, and the ends of a pair of adjacent sub-beams and a connecting member are fixed to the rising portion of this support member with two bolts at their longitudinal ends, and a part of the connecting member abuts against a part of the pair of sub-beams in a horizontal surface contact state at either the upper or lower part.

特開２０１７－１１４７３１号公報JP 2017-114731 A

屋根に作用する風荷重には吹き上げや吹き降ろしがあり、このような風荷重を支持する一対の小梁の長手方向の端部には、正方向及び負方向の回転力が作用する。
特許文献１の梁構造は、正方向及び負方向の回転力の一方の反力を、連結部材及び小梁の上部又は下部のどちらか一方の水平方向の面接触部分で受けているため、小梁に曲がりが生じたときには面接触状態が変化して、曲げに対する十分な剛性が確保できない場合がある。また、連結部材及び小梁の面接触部分は上部又は下部のどちらか一方の水平方向に限られているため、正方向及び負方向の回転力の一方に抗することができない。 Wind loads acting on a roof include upward and downward wind loads, and positive and negative rotational forces act on the longitudinal ends of a pair of small beams that support such wind loads.
In the beam structure of Patent Document 1, the reaction force of one of the positive and negative rotational forces is received by the horizontal surface contact portion of either the upper or lower part of the connecting member and the small beam, so when the small beam is bent, the surface contact state changes and sufficient rigidity against bending may not be secured. Also, since the surface contact portion of the connecting member and the small beam is limited to the horizontal direction of either the upper or lower part, it cannot resist either the positive or negative rotational force.

そこで、本発明は上記事情に鑑みてなされたものであり、連続化した第１及び第２構造梁に作用する正方向及び負方向の曲げモーメントに確実に抗することができる連続構造梁を提供するとともに、風荷重による大きな曲げモーメントが作用しても屋根材を確実に支持することができる屋根構造を提供することにある。 The present invention was made in consideration of the above circumstances, and aims to provide a continuous structural beam that can reliably resist positive and negative bending moments acting on the continuous first and second structural beams, as well as to provide a roof structure that can reliably support the roof material even when a large bending moment due to wind load acts on it.

上記目的を達成するために、本発明の一態様に係る連続構造梁は、直線状に並べて互いの一方の端部同士を突き合わせて配置した第１構造梁及び第２構造梁と、第１構造梁及び第２構造梁の一方の端部を跨いで配置された連結部材と、を備え、少なくとも、第１構造梁の一方の端部及び前記連結部材を固定する第１固定部と、第２構造梁の一方の端部及び連結部材を固定する第２固定部と、第１固定部に対して第１構造梁の他方の端部側に離間した位置で第１構造梁及び連結部材を固定する第３固定部と、第２固定部に対して第２構造梁の他方の端部側に離間した位置で第２構造梁及び連結部材を固定する第４固定部と、を備えており、第１構造梁及び第２構造梁に作用する正方向及び負方向の曲げモーメントに対して、第１固定部及び第３固定部の間で生じる反力と、第２固定部及び第４固定部の間で生じる反力とで発生する抵抗モーメントが対抗するようにした。
また、本発明に係る屋根構造は、上記連続構造梁を、屋根材を支持する母屋として大梁に交差して固定して構成した。 In order to achieve the above-mentioned object, a continuous structural beam according to one embodiment of the present invention comprises a first structural beam and a second structural beam arranged in a line with one end of each beam butted against each other, and a connecting member arranged across one end of the first structural beam and the second structural beam, and comprises at least a first fixing portion that fixes one end of the first structural beam and the connecting member, a second fixing portion that fixes one end of the second structural beam and the connecting member, a third fixing portion that fixes the first structural beam and the connecting member at a position spaced apart from the first fixing portion toward the other end of the first structural beam, and a fourth fixing portion that fixes the second structural beam and the connecting member at a position spaced apart from the second fixing portion toward the other end of the second structural beam, so that a resistance moment generated by a reaction force generated between the first fixing portion and the third fixing portion and a reaction force generated between the second fixing portion and the fourth fixing portion counteracts positive and negative bending moments acting on the first structural beam and the second structural beam.
The roof structure according to the present invention is constructed by fixing the above-mentioned continuous structural beam to a main beam so as to cross the beam as a purlin for supporting the roof material.

本発明に係る連続構造梁によると、連続化した第１及び第２構造梁に作用する正方向及び負方向の曲げモーメントに確実に抗することができる。また、本発明に係る屋根構造は、風荷重による大きな曲げモーメントが作用しても屋根材を確実に支持することができる。 The continuous structural beam of the present invention can reliably resist both positive and negative bending moments acting on the continuous first and second structural beams. Furthermore, the roof structure of the present invention can reliably support the roof material even when a large bending moment due to wind load acts on it.

本発明に係る第１実施形態の屋根構造を示す斜視図である。1 is a perspective view showing a roof structure of a first embodiment according to the present invention; 第１実施形態の屋根構造を構成する連続小梁部の要部を示す斜視図である。FIG. 2 is a perspective view showing a main part of the continuous beam portion that constitutes the roof structure of the first embodiment. 第１実施形態の連続小梁部の構成を示す図である。4A to 4C are diagrams showing a configuration of a continuous small beam portion according to the first embodiment; 図３のIV－IV線矢視図である。4 is a view taken along line IV-IV in FIG. 3. 第１実施形態の連続小梁部の組み立て途中を示す図である。11A and 11B are diagrams showing a process of assembling the continuous beam portion of the first embodiment. 本発明に係る第１～第８締結部を設けた第２実施形態の連続小梁部の構成を示す図である。13 is a diagram showing the configuration of a continuous beam portion of a second embodiment provided with first to eighth fastening portions according to the present invention; FIG. 本発明に係る第３実施形態の連続小梁部を示す図である。FIG. 13 is a view showing a continuous beam portion of a third embodiment according to the present invention. 本発明に係る第４実施形態の連続小梁部を示す図である。FIG. 13 is a view showing a continuous beam portion of a fourth embodiment according to the present invention.

次に、図面を参照して、本発明に係る実施形態を説明する。以下の図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。ただし、図面は模式的なものであり、厚みと平面寸法との関係、各層の厚みの比率等は現実のものとは異なることに留意すべきである。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断すべきものである。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ことはもちろんである。 Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., differ from the actual ones. Therefore, the specific thickness and dimensions should be determined with reference to the following explanation. In addition, it goes without saying that the drawings include parts with different dimensional relationships and ratios.

また、以下に示す実施形態は、本発明の技術的思想を具体化するための装置や方法を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造、配置等を下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。 The embodiments shown below are merely examples of devices and methods for embodying the technical ideas of the present invention, and the technical ideas of the present invention do not specify the materials, shapes, structures, arrangements, etc. of the components as described below. The technical ideas of the present invention can be modified in various ways within the technical scope defined by the claims.

［第１実施形態の屋根構造］
図１は、本発明に係る第１実施形態の屋根構造１の一部を示すものであり、Ｈ型鋼からなる大梁２と、大梁２に交差して固定された連続小梁部３と、を示している。
大梁２は、上下方向に延在するウェブ４と、ウェブ４の上端及び下端から交差する上部フランジ５、下部フランジ６と、を備えており、図示しないが、他の大梁も、大梁２に対して幅方向に所定間隔をあけて平行に複数配置されている。連続小梁部３は、複数の大梁２上に、所定間隔をあけて平行に複数配置されており、複数の連続小梁部３を、複数の屋根材を並べて連結する母屋として使用することで屋根が形成されている。
大梁２の上部フランジ５には、図２に示すように、クリップ８が固定されている。クリップ８は、金属板をＬ字状に曲げて小梁支持板８ａ及び大梁接続板８ｂを有する部材で
あり、大梁接続板８ｂが上部フランジ５に溶接で固定され、小梁支持板８ａの面方向が大梁２に直交する方向に延在するように配置されている。 [Roof structure of the first embodiment]
FIG. 1 shows a part of a roof structure 1 according to a first embodiment of the present invention, and shows a main girder 2 made of H-shaped steel and a continuous secondary beam portion 3 fixed to and intersecting the main girder 2.
The girder 2 comprises a web 4 extending in the vertical direction, and an upper flange 5 and a lower flange 6 intersecting the upper end and lower end of the web 4, and although not shown, a plurality of other girder parts are also arranged in parallel at predetermined intervals in the width direction relative to the girder 2. A plurality of continuous minor beam parts 3 are arranged in parallel at predetermined intervals on the plurality of girder parts 2, and the roof is formed by using the plurality of continuous minor beam parts 3 as purlins that line up and connect a plurality of roof materials.
As shown in Fig. 2, a clip 8 is fixed to the upper flange 5 of the girder 2. The clip 8 is a member formed by bending a metal plate into an L-shape and having a sub-beam support plate 8a and a girder connection plate 8b. The girder connection plate 8b is fixed to the upper flange 5 by welding, and the surface direction of the sub-beam support plate 8a is arranged to extend in a direction perpendicular to the girder 2.

［第１実施形態の連続小梁部］
第１実施形態の連続小梁部３は、図１に示すように、長手方向に並べて長手方向端部同士を突き合せて配置した一対の小梁１０Ａ，１０Ｂと、一対の小梁１０Ａ，１０Ｂの端部同士を跨いで固定されている連結部材１１と、を備え、クリップ８を介して大梁２に固定されている。
小梁１０Ａ，１０Ｂは、Ｚ形鋼で構成されており、図２に示すように、梁ウェブ１０ａと、梁ウェブ１０ａの幅方向一端から直交して延在する第１梁フランジ１０ｂと、第１梁フランジ１０ｂの端部から直交して梁ウェブ１０ａに平行に延在する梁リップ部１０ｃと、梁ウェブ１０ａの幅方向他端から第１梁フランジ１０ｂが延在する方向に対して逆方向に直交する第２梁フランジ１０ｄと、第２梁フランジ１０ｄの端部から直交して梁ウェブ１０ａに平行に延在する梁リップ部１０ｅと、を備えている。 [Continuous beam portion of the first embodiment]
As shown in Figure 1, the continuous beam portion 3 of the first embodiment comprises a pair of beams 10A, 10B arranged in the longitudinal direction with their longitudinal ends butted together, and a connecting member 11 fixed across the ends of the pair of beams 10A, 10B, and is fixed to the main beam 2 via a clip 8.
The sub-beams 10A, 10B are made of Z-shaped steel and, as shown in Figure 2, comprise a beam web 10a, a first beam flange 10b extending perpendicularly from one widthwise end of the beam web 10a, a beam lip portion 10c extending perpendicularly from the end of the first beam flange 10b and parallel to the beam web 10a, a second beam flange 10d extending perpendicularly from the other widthwise end of the beam web 10a in the opposite direction to the direction in which the first beam flange 10b extends, and a beam lip portion 10e extending perpendicularly from the end of the second beam flange 10d and parallel to the beam web 10a.

連結部材１１はＣ形鋼で構成されており、図２に示すように、連結ウェブ１１ａと、連結ウェブ１１ａの幅方向一端から直交して延在する第１連結フランジ１１ｂと、第１連結フランジ１１ｂの端部から直交して連結ウェブ１１ａに平行に延在する連結リップ部１１ｃと、連結ウェブ１１ａの幅方向他端から第１連結フランジ１１ｂと同一方向に平行に延在する第２連結フランジ１１ｄと、第２連結フランジ１１ｄの端部から直交して連結ウェブ１１ａに平行に延在する連結リップ部１１ｅと、を備えている。 The connecting member 11 is made of C-shaped steel, and as shown in FIG. 2, includes a connecting web 11a, a first connecting flange 11b extending perpendicularly from one end of the connecting web 11a in the width direction, a connecting lip portion 11c extending perpendicularly from the end of the first connecting flange 11b and parallel to the connecting web 11a, a second connecting flange 11d extending parallel to the first connecting flange 11b from the other end of the connecting web 11a in the same direction as the first connecting flange 11b, and a connecting lip portion 11e extending perpendicularly from the end of the second connecting flange 11d and parallel to the connecting web 11a.

図２に示すように、小梁１０Ａの梁ウェブ１０ａの高さＨ１は、連結部材１１の連結ウェブ１１ａの高さＨ２と略同一寸法に設定されている（Ｈ１≒Ｈ２）。また、小梁１０Ａの第２梁フランジ１０ｄ（第１梁フランジ１０ｂ）のフランジ幅Ｆ１は、連結部材１１の第２連結フランジ１１ｄ（第１連結フランジ１１ｂ）のフランジ幅Ｆ２より大きく設定されている（Ｆ１＞Ｆ２）。
一対の小梁１０Ａ、１０Ｂは、図２に示すように、互いの梁ウェブ１０ａが上下方向に延在して、大梁２に直交する方向に長手方向に並べて直線状に配置されている。そして、一対の小梁１０Ａ、１０Ｂの互いの長手方向の端部同士を突き合せ、突き合せた互いの長手方向の端部側の梁ウェブ１０ａが、クリップ８の小梁支持板８ａに当接する。 2, the height H1 of the beam web 10a of the sub-beam 10A is set to be approximately the same as the height H2 of the connecting web 11a of the connecting member 11 (H1 ≈ H2). In addition, the flange width F1 of the second beam flange 10d (first beam flange 10b) of the sub-beam 10A is set to be larger than the flange width F2 of the second connecting flange 11d (first connecting flange 11b) of the connecting member 11 (F1 > F2).
2, the pair of minor beams 10A, 10B are arranged in a straight line, with their beam webs 10a extending in the vertical direction and aligned in the longitudinal direction perpendicular to the main beam 2. The longitudinal ends of the pair of minor beams 10A, 10B are butted against each other, and the beam webs 10a at the butted longitudinal ends abut against the minor beam support plate 8a of the clip 8.

また、連結部材１１は、一対の小梁１０Ａ，１０Ｂの端部同士を跨ぐように配置されている。そして、連結ウェブ１１ａが一対の小梁１０Ａ，１０Ｂの梁ウェブ１０ａに当接し、第２連結フランジ１１ｄ及び連結リップ部１１ｅが、一対の小梁１０Ａ、１０Ｂの第２梁フランジ１０ｄ及び梁リップ部１０ｅの内側に嵌まり込んでいる。そして、第１連結フランジ１１ｂ及び連結リップ部１１ｃが、一対の小梁１０Ａ、１０Ｂの第１梁フランジ１０ｂ及び梁リップ部１０ｃに対して逆側に延在するように配置されている。 The connecting member 11 is arranged so as to straddle the ends of the pair of sub-beams 10A, 10B. The connecting web 11a abuts against the beam web 10a of the pair of sub-beams 10A, 10B, and the second connecting flange 11d and the connecting lip portion 11e are fitted inside the second beam flange 10d and beam lip portion 10e of the pair of sub-beams 10A, 10B. The first connecting flange 11b and the connecting lip portion 11c are arranged so as to extend on the opposite side of the first beam flange 10b and beam lip portion 10c of the pair of sub-beams 10A, 10B.

［連続小梁部の第１～第４締結部の構造］
そして、図３に示すように、一方の小梁１０Ａは、他方の小梁１０Ｂに突き合わせた長手方向の端部側に設けた第１締結部１２で連結部材１１及びクリップ８に固定されているとともに、他方の小梁１０Ｂは、第１締結部１２に近くの一方の小梁１０Ａに突き合わせた長手方向の端部側に設けた第２締結部１３で連結部材１１及びクリップ８に固定されている。
また、一方の小梁１０Ａは、第１締結部１２に離間して連結部材１１の一方の端部側に設けた第３締結部１４で連結部材１１に固定されているとともに、他方の小梁１０Ｂは、第２締結部１３に離間して連結部材１１の他方の端部側に設けた第４締結部１５に固定されている。 [Structure of the first to fourth fastening parts of the continuous beam part]
As shown in Figure 3, one of the sub-beams 10A is fixed to the connecting member 11 and the clip 8 by a first fastening portion 12 provided at the longitudinal end side that abuts against the other sub-beam 10B, and the other sub-beam 10B is fixed to the connecting member 11 and the clip 8 by a second fastening portion 13 provided at the longitudinal end side that abuts against the one of the sub-beams 10A near the first fastening portion 12.
In addition, one of the sub-beams 10A is fixed to the connecting member 11 by a third fastening portion 14 provided on one end side of the connecting member 11, spaced apart from the first fastening portion 12, and the other sub-beam 10B is fixed to a fourth fastening portion 15 provided on the other end side of the connecting member 11, spaced apart from the second fastening portion 13.

第１締結部１２は、図４に示すように、上下方向に離間して配置した３本のボルト及びナットを備えている。第１締結部１２の中で最上部に位置する第１ボルト１６は、連結部材１１の連結ウェブ１１ａ及び一方の小梁１０Ａの梁ウェブ１０ａが当接している位置で両者を貫通した後に第１ナット１７を締め込むことで、一方の小梁１０Ａ及び連結部材１１を固定している。第１締結部１２の中で最下部に位置する第２ボルト１８は、連結部材１１の連結ウェブ１１ａ、クリップ８の小梁支持板８ａ及び一方の小梁１０Ａの梁ウェブ１０ａが当接している位置で三者を貫通した後に第２ナット１９を締め込むことで、一方の小梁１０Ａ、クリップ８及び連結部材１１を固定している。 As shown in FIG. 4, the first fastening portion 12 has three bolts and nuts spaced apart in the vertical direction. The first bolt 16 located at the top of the first fastening portion 12 penetrates the connecting web 11a of the connecting member 11 and the beam web 10a of one of the sub-beams 10A at a position where they are in contact, and then tightens the first nut 17 to fix the one of the sub-beams 10A and the connecting member 11. The second bolt 18 located at the bottom of the first fastening portion 12 penetrates the connecting web 11a of the connecting member 11, the sub-beam support plate 8a of the clip 8, and the beam web 10a of one of the sub-beams 10A at a position where they are in contact, and then tightens the second nut 19 to fix the one of the sub-beams 10A, the clip 8, and the connecting member 11.

また、第１締結部１２の中で中間に位置する第３ボルト２０は、連結部材１１の連結ウェブ１１ａに形成した自身のボルト頭部２０ａより大きな直径の貫通孔１１ｆを通過し、一方の小梁１０Ａの梁ウェブ１０ａ及びクリップ８の小梁支持板８ａが当接している位置で両者を貫通した後に第３ナット２１を締め込むことで、一方の小梁１０Ａ及びクリップ８を固定している。
また、第２締結部１３は、図示しないが、第１締結部１２と同様に、上下方向に離間して配置した第１～第３ボルト１６，１８，２０及び第１～第３ナット１７，１９，２１を使用して他方の小梁１０Ｂ、クリップ８の小梁支持板８ａ及び連結部材１１を固定している。 In addition, the third bolt 20, which is located in the middle of the first fastening portion 12, passes through a through hole 11f having a diameter larger than its own bolt head 20a formed in the connecting web 11a of the connecting member 11, and penetrates both the beam web 10a of one of the sub-beams 10A and the sub-beam support plate 8a of the clip 8 at the position where they abut, and then the third nut 21 is tightened to fix the one of the sub-beams 10A and the clip 8.
In addition, the second fastening portion 13, although not shown, similar to the first fastening portion 12, fixes the other sub-beam 10B, the sub-beam support plate 8a of the clip 8, and the connecting member 11 using first to third bolts 16, 18, and 20 and first to third nuts 17, 19, and 21 arranged at a distance in the vertical direction.

第３締結部１４は、一方の小梁１０Ａの梁ウェブ１０ａ及び連結部材１１の連結ウェブ１１ａを上下２本の第４及び第５ボルト２２，２３が貫通してナット（不図示）を締め込むことで、一方の小梁１０Ａ及び連結部材１１が固定されている。また、第４締結部１５も、他方の小梁１０Ｂの梁ウェブ１０ａ及び連結部材１１の連結ウェブ１１ａを上下２本の第４及び第５ボルト２２，２３が貫通してナット（不図示）を締め込むことで、他方の小梁１０Ｂ及び連結部材１１が固定されている。 The third fastening portion 14 is secured to one of the sub-beams 10A and the connecting member 11 by passing two fourth and fifth bolts 22, 23 through the beam web 10a of one of the sub-beams 10A and the connecting web 11a of the connecting member 11 and tightening nuts (not shown). The fourth fastening portion 15 is secured to the other of the sub-beams 10B and the connecting member 11 by passing two fourth and fifth bolts 22, 23 through the beam web 10a of the other of the sub-beams 10B and the connecting web 11a of the connecting member 11 and tightening nuts (not shown).

ここで、図５は、第１締結部１２（第２締結部１３）の組立途中を示すものであり、先ず、第３ボルト２０を、一方の小梁１０Ａ（他方の小梁１０Ｂ）の梁ウェブ１０ａ及びクリップ８の小梁支持板８ａに貫通して第３ナット２１を締め込むことで、一方の小梁１０Ａ及びクリップ８を固定する。次いで、連結部材１１を、一対の小梁１０Ａ，１０Ｂの端部同士を跨ぐように配置し、第２連結フランジ１１ｄ及び連結リップ部１１ｅを、一対の小梁１０Ａ、１０Ｂの第２梁フランジ１０ｄ及び梁リップ部１０ｅの内側に嵌めこみ、連結ウェブ１１ａに形成した貫通孔１１ｆに第３ボルト２０を挿通しながら、連結ウェブ１１ａを梁ウェブ１０ａに当接させる。そして、当接した連結ウェブ１１ａ及び梁ウェブ１０ａに第１ボルト１６及び第２ボルト１８を貫通して第１ナット１７及び第２ナット１９を締め込むことで、第１締結部１２（第２締結部１３）の固定が完了する。 5 shows the first fastening portion 12 (second fastening portion 13) in the middle of assembly. First, the third bolt 20 is inserted through the beam web 10a of one beam 10A (the other beam 10B) and the beam support plate 8a of the clip 8, and the third nut 21 is tightened to fix one beam 10A and the clip 8. Next, the connecting member 11 is arranged to straddle the ends of the pair of beams 10A and 10B, and the second connecting flange 11d and the connecting lip portion 11e are fitted inside the second beam flange 10d and beam lip portion 10e of the pair of beams 10A and 10B, and the connecting web 11a is abutted against the beam web 10a while the third bolt 20 is inserted through the through hole 11f formed in the connecting web 11a. Then, the first bolt 16 and the second bolt 18 are passed through the abutting connecting web 11a and beam web 10a, and the first nut 17 and the second nut 19 are tightened to complete the fixation of the first fastening portion 12 (second fastening portion 13).

［第１実施形態の連続小梁部及び屋根構造の作用効果］
本実施形態の連続小梁部３に、図３に示す曲げモーメント（正方向曲げモーメントと称する）が生じると、一方の小梁１０Ａ及び連結部材１１を固定している第１締結部１２と第３締結部１４には、正方向曲げモーメントに対する反力が生じることで、連結部材１１の曲げ抵抗によって抵抗モーメントＭ１が発生する。第１締結部１２及び第３締結部１４に生じる反力をＦとし、第１締結部１２と第３締結部１４との間隔をＬとすると、抵抗モーメントＭ１＝Ｆ×Ｌとなる。また、他方の小梁１０Ｂ及び連結部材１１を固定している第２締結部１３と第４締結部１５にも、正方向曲げモーメントに対する反力が生じて抵抗モーメントＭ２が発生し、第２締結部１３及び第４締結部１５に生じる反力をＦとし、第１締結部１２と第３締結部１４との間隔をＬとすると、抵抗モーメントＭ２＝Ｆ×Ｌとなる。 [Functions and Effects of the Continuous Beam Section and Roof Structure of the First Embodiment]
When the bending moment shown in FIG. 3 (referred to as a positive bending moment) occurs in the continuous beam portion 3 of this embodiment, a reaction force against the positive bending moment occurs in the first fastening portion 12 and the third fastening portion 14 that fix the beam 10A and the connecting member 11 on one side, and a resistance moment M1 occurs due to the bending resistance of the connecting member 11. If the reaction force generated in the first fastening portion 12 and the third fastening portion 14 is F and the distance between the first fastening portion 12 and the third fastening portion 14 is L, the resistance moment M1 = F x L. In addition, a reaction force against the positive bending moment occurs in the second fastening portion 13 and the fourth fastening portion 15 that fix the beam 10B and the connecting member 11 on the other side, and a resistance moment M2 occurs. If the reaction force generated in the second fastening portion 13 and the fourth fastening portion 15 is F and the distance between the first fastening portion 12 and the third fastening portion 14 is L, the resistance moment M2 = F x L.

一方、図３の正方向曲げモーメントに対して逆向きの曲げモーメント（負方向曲げモーメントと称する）が生じると、一方の小梁１０Ａ及び連結部材１１を固定している第１締結部１２と第３締結部１４には、連結部材１１の曲げ抵抗による抵抗モーメントＭ１が発生する。この抵抗モーメントＭ１は、第１締結部１２及び第３締結部１４に生じる図３とは逆向きの反力Ｆと、第１締結部１２と第３締結部１４との間隔Ｌとで、Ｍ１＝Ｆ×Ｌとなる。また、他方の小梁１０Ｂ及び連結部材１１を固定している第２締結部１３と第４締結部１５には、連結部材１１の曲げ抵抗による抵抗モーメントＭ２が発生する。この抵抗モーメントＭ２は、第２締結部１３及び第４締結部１５に生じる図３とは逆向きの反力Ｆと、第２締結部１３と第４締結部１５との間隔Ｌとで、Ｍ２＝Ｆ×Ｌとなる。 On the other hand, when a bending moment (referred to as a negative bending moment) occurs in the opposite direction to the positive bending moment in FIG. 3, a resistance moment M1 occurs in the first fastening portion 12 and the third fastening portion 14 that fix the small beam 10A and the connecting member 11 on one side due to the bending resistance of the connecting member 11. This resistance moment M1 is M1 = F x L, which is the reaction force F in the first fastening portion 12 and the third fastening portion 14 in the opposite direction to that in FIG. 3 and the distance L between the first fastening portion 12 and the third fastening portion 14. In addition, a resistance moment M2 occurs in the second fastening portion 13 and the fourth fastening portion 15 that fix the other small beam 10B and the connecting member 11 due to the bending resistance of the connecting member 11. This resistance moment M2 is M2 = F x L, which is the reaction force F in the second fastening portion 13 and the fourth fastening portion 15 in the opposite direction to that in FIG. 3 and the distance L between the second fastening portion 13 and the fourth fastening portion 15.

したがって、本実施形態の長手方向に並んで配置された連続小梁部３は、一対の小梁１０Ａ，１０Ｂに、正方向及び負方向曲げモーメントが作用すると、一方の小梁１０Ａと連結部材１１とを固定する２箇所の第１締結部１２及び第３締結部１４が設けられており、他方の小梁１０Ｂと連結部材１１とを固定する２箇所の第２締結部１３及び第４締結部１５が設けられていることから、正方向及び負方向曲げモーメントに対抗する抵抗モーメントＭ１、Ｍ２が連結部材１１で発生する。これにより、一対の小梁１０Ａ，１０Ｂ及びこれらを固定する連結部材１１からなる連続小梁部３を、十分な曲げ耐力を有する構造部材として使用することができる。 Therefore, in this embodiment, when positive and negative bending moments act on the pair of beams 10A and 10B, the continuous beam section 3 arranged in the longitudinal direction has two first fastening parts 12 and third fastening parts 14 that fasten one beam 10A to the connecting member 11, and two second fastening parts 13 and fourth fastening parts 15 that fasten the other beam 10B to the connecting member 11. Therefore, resistance moments M1 and M2 that counter the positive and negative bending moments are generated in the connecting member 11. As a result, the continuous beam section 3 consisting of the pair of beams 10A and 10B and the connecting member 11 that fastens them can be used as a structural member with sufficient bending strength.

また、連続小梁部３を、屋根構造１の複数の屋根材が並べて連結される母屋として使用することで、屋根に吹き上げや吹き降ろしの風荷重が作用しても、連続小梁部３が正方向及び負方向曲げモーメントに対して十分な曲げ耐力を有するので、吹き上げや吹き降ろしの風荷重に対する耐久効果を十分に高めた屋根構造１とすることができる。
また、第１締結部１２～第４締結部１５は、一対の小梁１０Ａ，１０Ｂの梁ウェブ１０ａ及び連結部材１１の連結ウェブ１１ａが面接触した状態で、上下方向に配置した少なくとも２本以上のボルト及びナットの締め込みで一対の小梁１０Ａ，１０Ｂ及び連結部材が固定されていることから、正方向及び負方向曲げモーメントに対抗する抵抗モーメントＭ１、Ｍ２が発生する際に、梁ウェブ１０ａ及び連結ウェブ１１ａの面外変形が防止され、連続小梁部３の剛性を確保することができる。 Furthermore, by using the continuous beam section 3 as a main structure to which multiple roof materials of the roof structure 1 are lined up and connected, even if wind loads from updrafts and downdrafts act on the roof, the continuous beam section 3 has sufficient bending strength against positive and negative bending moments, making it possible to create a roof structure 1 with sufficiently enhanced durability against wind loads from updrafts and downdrafts.
In addition, the first fastening portion 12 to the fourth fastening portion 15 are fixed by tightening at least two or more bolts and nuts arranged in the vertical direction, with the beam web 10a of the pair of sub-beams 10A, 10B and the connecting member 11 being in face-to-face contact with each other, so that when resistance moments M1, M2 that counteract the positive and negative bending moments are generated, out-of-plane deformation of the beam web 10a and the connecting web 11a is prevented, and the rigidity of the continuous sub-beam portion 3 is ensured.

また、連続小梁部３は、Ｚ形鋼で構成した一対の小梁１０Ａ，１０Ｂと、Ｃ形鋼で構成した連結部材１１に限るものではなく、一対の小梁１０Ａ，１０Ｂを、コ形鋼、Ｌ形鋼、Ｈ形鋼、角形鋼管で構成し、連結部材１１を、コ形鋼、Ｌ形鋼、Ｈ形鋼、角形鋼管で構成してもよい。このように、一対の小梁１０Ａ，１０Ｂ及び連結部材１１を、複数種類の形鋼の中から２種類を選んで構成することにより、断面形状の選定の自由度が広くなり、経済的で施工性を向上させることができる。 The continuous beam section 3 is not limited to a pair of beams 10A, 10B made of Z-shaped steel and a connecting member 11 made of C-shaped steel. The pair of beams 10A, 10B may be made of U-shaped steel, L-shaped steel, H-shaped steel, or square steel pipes, and the connecting member 11 may be made of U-shaped steel, L-shaped steel, H-shaped steel, or square steel pipes. In this way, by selecting two types of steel from multiple types of steel for the pair of beams 10A, 10B and the connecting member 11, the freedom to select the cross-sectional shape is increased, making it more economical and easier to construct.

さらに、連続小梁部３の第１締結部１２及び第３締結部１４との間隔Ｌ、第２締結部１３及び第４締結部１５との間隔Ｌを長く設定すると、第１締結部１２～第４締結部１５で生じる反力Ｆが小さくなり、ボルト及びナットの本数を減少させることができる。
上記実施形態では、Ｚ形鋼で構成した一対の小梁１０Ａ，１０Ｂは、高さＨ１が２３７．５mm、フランジ幅Ｆ１が６８．８mm、板厚が２mmである。また、Ｃ形鋼で構成した連結部材１１は、高さＨ２が２３２mm、フランジ幅Ｆ２が６０mm、板厚が２．３mmである。上述した寸法の一対の小梁１０Ａ，１０Ｂ及び連結部材１１を使用して連続小梁部３を構成する場合、第１締結部１２と第３締結部１４との間隔Ｌ（第２締結部１３と第４締結部１５との間隔Ｌ）は、７１５mmであり、第１締結部１２と第３締結部１４との間隔（第２締結部１３と第４締結部１５との間隔）Ｌと一対の小梁１０Ａ，１０Ｂの高さＨ１との関係は、Ｌ／Ｈ１＝３．１である。一般に、Ｌ／Ｈ１≧２．５にすると、第１～第４締結部１２～１５の配置、固定部材（ボルト及びナット）の仕様などを適切に選定することができる。 Furthermore, by setting the distance L between the first fastening portion 12 and the third fastening portion 14 of the continuous beam portion 3, and the distance L between the second fastening portion 13 and the fourth fastening portion 15 to be long, the reaction force F generated at the first fastening portion 12 to the fourth fastening portion 15 becomes smaller, and the number of bolts and nuts can be reduced.
In the above embodiment, the pair of beams 10A, 10B made of Z-shaped steel have a height H1 of 237.5 mm, a flange width F1 of 68.8 mm, and a plate thickness of 2 mm. The connecting member 11 made of C-shaped steel has a height H2 of 232 mm, a flange width F2 of 60 mm, and a plate thickness of 2.3 mm. When the continuous beam section 3 is constructed using the pair of beams 10A, 10B and the connecting member 11 having the above dimensions, the distance L between the first fastening portion 12 and the third fastening portion 14 (the distance L between the second fastening portion 13 and the fourth fastening portion 15) is 715 mm, and the relationship between the distance L between the first fastening portion 12 and the third fastening portion 14 (the distance L between the second fastening portion 13 and the fourth fastening portion 15) and the height H1 of the pair of beams 10A, 10B is L/H1=3.1. In general, when L/H1≧2.5, the arrangement of the first to fourth fastening portions 12 to 15, the specifications of the fixing members (bolts and nuts), and the like can be appropriately selected.

［第２実施形態の連続小梁部］
次に、図６は、第２実施形態の連続小梁部３０を示すものである。なお、図３で示した第１実施形態の連続小梁部３０と同一構成部分には、同一符号を付して説明は省略する。
一方の小梁１０Ａ（Ｚ形鋼）は、他方の小梁１０Ｂ（Ｚ形鋼）に突き合わせた長手方向の端部側に設けた第１締結部３１で連結部材１１（Ｃ形鋼）及びクリップ８に固定されているとともに、第１締結部３１に近接する位置に設けた第２締結部３２で連結部材１１に固定されている。また、他方の小梁１０Ｂ（Ｚ形鋼）は、第１締結部３１に近くの一方の小梁１０Ａに突き合わせた長手方向の端部側に設けた第３締結部３３で連結部材１１及びクリップ８に固定されているとともに、第３締結部３３に近接する位置に設けた第４締結部３４で連結部材１１に固定されている。 [Continuous beam portion of second embodiment]
Next, Fig. 6 shows a continuous beam portion 30 according to a second embodiment. Note that the same components as those of the continuous beam portion 30 according to the first embodiment shown in Fig. 3 are given the same reference numerals and the description thereof will be omitted.
One beam 10A (Z-shaped steel) is fixed to the connecting member 11 (C-shaped steel) and clip 8 by a first fastening portion 31 provided at the end of the longitudinal direction where it abuts against the other beam 10B (Z-shaped steel), and is fixed to the connecting member 11 by a second fastening portion 32 provided at a position close to the first fastening portion 31. The other beam 10B (Z-shaped steel) is fixed to the connecting member 11 and clip 8 by a third fastening portion 33 provided at the end of the longitudinal direction where it abuts against the one beam 10A near the first fastening portion 31, and is fixed to the connecting member 11 by a fourth fastening portion 34 provided at a position close to the third fastening portion 33.

また、一方の小梁１０Ａは、第１及び第２締結部３１，３２に離間して連結部材１１の一方の端部側に設けた第５締結部３５で連結部材１１に固定されているとともに、第５締結部３５に近接する位置に設けた第６締結部３６でも連結部材１１に固定されている。
さらに、他方の小梁１０Ｂは、第３及び第４締結部３３，３４に離間して連結部材１１の他方の端部側に設けた第７締結部３７で連結部材１１に固定されているとともに、第７締結部３７に近接する位置に設けた第８締結部３８でも連結部材１１に固定されている。
第１～第８締結部３１～３８の各々は、上下方向に離間して一対の小梁１０Ａ，１０Ｂ及び連結部材を貫通締結する３本のボルト及びナットで構成されている。 In addition, one of the small beams 10A is fixed to the connecting member 11 by a fifth fastening portion 35 provided on one end side of the connecting member 11, spaced apart from the first and second fastening portions 31, 32, and is also fixed to the connecting member 11 by a sixth fastening portion 36 provided in a position close to the fifth fastening portion 35.
Furthermore, the other small beam 10B is fixed to the connecting member 11 by a seventh fastening portion 37 provided on the other end side of the connecting member 11, spaced apart from the third and fourth fastening portions 33, 34, and is also fixed to the connecting member 11 by an eighth fastening portion 38 provided in a position close to the seventh fastening portion 37.
Each of the first to eighth fastening portions 31 to 38 is composed of three bolts and nuts that are spaced apart in the vertical direction and penetrate and fasten the pair of small beams 10A, 10B and the connecting member.

本実施形態の連続小梁部３０に正方向曲げモーメントが生じると、一方の小梁１０Ａ及び連結部材１１を固定している第１、第２締結部３１，３２及び第５、第６締結部３５，３６には、正方向曲げモーメントに対する反力が生じることで、連結部材１１の曲げ抵抗によって抵抗モーメントＭ３が発生する。第１締結部３１及び第６締結部３６に生じる反力をＦ１とし、第２締結部３２及び第５締結部３５に生じる反力をＦ２とし、第１締結部３１と第６締結部３６との間隔をＬ１とし、第２締結部３２と第５締結部３５との間隔をＬ２とすると、抵抗モーメントＭ１＝Ｆ１×Ｌ１＋Ｆ２×Ｌ２となる。また、他方の小梁１０Ｂ及び連結部材１１を固定している第３、第４締結部３３，３４及び第７、第８締結部３７，３８にも、正方向曲げモーメントに対する反力が生じて抵抗モーメントＭ４が発生する。この抵抗モーメントＭ４は、第４締結部３３及び第８締結部３８に生じる反力をＦ１とし、第４締結部３４及び第７締結部３７に生じる反力をＦ２とし、第３締結部３３と第８締結部３８との間隔をＬ１とし、第４締結部３４と第７締結部３７との間隔をＬ２とすると、抵抗モーメントＭ４＝Ｆ１×Ｌ１＋Ｆ２×Ｌ２となる。 When a positive bending moment occurs in the continuous beam portion 30 of this embodiment, a reaction force against the positive bending moment occurs in the first and second fastening portions 31, 32 and the fifth and sixth fastening portions 35, 36 that fix one of the beams 10A and the connecting member 11, and a resistance moment M3 is generated by the bending resistance of the connecting member 11. If the reaction force generated in the first fastening portion 31 and the sixth fastening portion 36 is F1, the reaction force generated in the second fastening portion 32 and the fifth fastening portion 35 is F2, the distance between the first fastening portion 31 and the sixth fastening portion 36 is L1, and the distance between the second fastening portion 32 and the fifth fastening portion 35 is L2, then the resistance moment M1 = F1 x L1 + F2 x L2. In addition, a reaction force against the positive bending moment occurs in the third and fourth fastening parts 33, 34 and the seventh and eighth fastening parts 37, 38 that fix the other joist 10B and the connecting member 11, generating a resistance moment M4. If the reaction force generated in the fourth fastening part 33 and the eighth fastening part 38 is F1, the reaction force generated in the fourth fastening part 34 and the seventh fastening part 37 is F2, the distance between the third fastening part 33 and the eighth fastening part 38 is L1, and the distance between the fourth fastening part 34 and the seventh fastening part 37 is L2, then the resistance moment M4 = F1 x L1 + F2 x L2.

一方、図３の正方向曲げモーメントに対して逆向きの負方向曲げモーメントが生じると、一方の小梁１０Ａ及び連結部材１１を固定している第１、第２締結部３１，３２及び第５、第６締結部３５，３６には、負方向曲げモーメントに対する反力が生じることで、連結部材１１の曲げ抵抗によって抵抗モーメントＭ３が発生する。また、他方の小梁１０Ｂ及び連結部材１１を固定している第３、第４締結部３３，３４及び第７、第８締結部３７，３８にも、負方向曲げモーメントに対する反力が生じることで、連結部材１１の曲げ抵抗によって抵抗モーメントＭ４が発生する。 On the other hand, when a negative bending moment occurs in the opposite direction to the positive bending moment in FIG. 3, a reaction force against the negative bending moment is generated in the first and second fastening parts 31, 32 and the fifth and sixth fastening parts 35, 36 that secure the sub-beam 10A and the connecting member 11 on one side, and a resistance moment M3 is generated by the bending resistance of the connecting member 11. In addition, a reaction force against the negative bending moment is generated in the third and fourth fastening parts 33, 34 and the seventh and eighth fastening parts 37, 38 that secure the other sub-beam 10B and the connecting member 11, and a resistance moment M4 is generated by the bending resistance of the connecting member 11.

したがって、本実施形態の連続小梁部３０は、一対の小梁１０Ａ，１０Ｂに、正方向及び負方向曲げモーメントが作用すると、一方の小梁１０Ａと連結部材１１とを固定する４箇所の第１、第２締結部３１，３２及び第５、第６締結部３５，３６が設けられており、他方の小梁１０Ｂと連結部材１１とを固定する４箇所の第３、第４締結部３３，３４及び第７、第８締結部３７，３８が設けられていることから、正方向及び負方向曲げモーメントに対抗する抵抗モーメントＭ３、Ｍ４が連結部材１１で発生する。本実施形態の連続小梁部３０は、正方向及び負方向曲げモーメントが作用すると、第２実施形態の連続小梁部３より大きな抵抗モーメントＭ３、Ｍ４が生じるので、第１実施形態の連続小梁部３より大きな曲げ耐力を有する構造部材として使用することができる。
また、本実施形態の連続小梁部３０を、屋根構造１に使用することで、第１実施形態の連続小梁部３と比較して、吹き上げや吹き降ろしの風荷重に対する耐久効果を大幅に増大させた屋根構造１とすることができる。 Therefore, when the positive and negative bending moments act on the pair of beams 10A and 10B, the continuous beam section 30 of this embodiment has four first and second fastening parts 31, 32 and fifth and sixth fastening parts 35, 36 for fixing one beam 10A to the connecting member 11, and four third and fourth fastening parts 33, 34 and seventh and eighth fastening parts 37, 38 for fixing the other beam 10B to the connecting member 11, so that resistance moments M3 and M4 against the positive and negative bending moments are generated in the connecting member 11. When the positive and negative bending moments act on the continuous beam section 30 of this embodiment, resistance moments M3 and M4 larger than those of the continuous beam section 3 of the second embodiment are generated, so that it can be used as a structural member having a larger bending strength than the continuous beam section 3 of the first embodiment.
Furthermore, by using the continuous beam portion 30 of this embodiment in the roof structure 1, it is possible to obtain a roof structure 1 having significantly increased durability against upwind and downwind wind loads compared to the continuous beam portion 3 of the first embodiment.

［第３実施形態の連続小梁部］
次に、図７は、第３実施形態の連続小梁部４０を示すものである。
連続小梁部４０は、長手方向に並べて長手方向端部同士を突き合せて配置した一対の小梁４１Ａ，４１Ｂと、一対の小梁４１Ａ，４１Ｂの端部同士を跨いで固定されている連結部材４２と、を備え、クリップ８を介して大梁２に固定されている。
一対の小梁４１Ａ，４１Ｂは、オープンリップタイプのＺ形鋼で構成されており、梁ウェブ４１ａと、梁ウェブ４１ａの幅方向一端から直交して延在する第１梁フランジ４１ｂと、第１梁フランジ４１ｂの端部から鈍角に延在する梁リップ部４１ｃと、梁ウェブ４１ａの幅方向他端から第１梁フランジ４１ｂが延在する方向に対して逆方向に直交する第２梁フランジ４１ｄと、第２梁フランジ１０ｄの端部から鈍角に延在する梁リップ部４１ｅと、を備えている。 [Continuous beam portion of the third embodiment]
Next, FIG. 7 shows a continuous beam portion 40 according to a third embodiment.
The continuous beam portion 40 comprises a pair of beams 41A, 41B arranged in the longitudinal direction with their longitudinal ends butted together, and a connecting member 42 fixed across the ends of the pair of beams 41A, 41B, and is fixed to the main beam 2 via clips 8.
The pair of small beams 41A, 41B are made of open-lip type Z-shaped steel and include a beam web 41a, a first beam flange 41b extending perpendicularly from one widthwise end of the beam web 41a, a beam lip portion 41c extending at an obtuse angle from the end of the first beam flange 41b, a second beam flange 41d extending perpendicularly from the other widthwise end of the beam web 41a in the opposite direction to the direction in which the first beam flange 41b extends, and a beam lip portion 41e extending at an obtuse angle from the end of the second beam flange 41d.

連結部材４２も、一対の小梁４１Ａ，４１Ｂと同一の形状のオープンリップタイプのＺ形鋼で構成されており、図２に示すように、連結ウェブ４２ａと、連結ウェブ４２ａの幅方向一端から直交して延在する第１連結フランジ４２ｂと、第１連結フランジ１１ｂの端部から鈍角に延在する連結リップ部４２ｃと、連結ウェブ４２ａの幅方向他端から第１連結フランジ４２ｂが延在する方向に対して逆方向に直交する第２連結フランジ４２ｄと、第２連結フランジ４２ｄの端部から鈍角に延在する連結リップ部４２ｅと、を備えている。 The connecting member 42 is also made of an open-lip type Z-shaped steel with the same shape as the pair of small beams 41A, 41B, and as shown in FIG. 2, it has a connecting web 42a, a first connecting flange 42b extending perpendicularly from one end of the width direction of the connecting web 42a, a connecting lip portion 42c extending at an obtuse angle from the end of the first connecting flange 11b, a second connecting flange 42d perpendicularly extending from the other end of the width direction of the connecting web 42a in the opposite direction to the direction in which the first connecting flange 42b extends, and a connecting lip portion 42e extending at an obtuse angle from the end of the second connecting flange 42d.

連結部材４２は、前述したように一対の小梁４１Ａ，４１Ｂの端部同士を跨ぐように配置されている。そして、連結ウェブ４２ａが一対の小梁４１Ａ，４１Ｂの梁ウェブ４１ａに面接触状態で当接し、第１連結フランジ４２ｂ及び連結リップ部４２ｃが、一対の小梁４１Ａ、４１Ｂの第１梁フランジ４１ｂ及び梁リップ部４１ｃに面接触状態で当接し、第２連結フランジ４２ｄ及び連結リップ部４２ｅが、一対の小梁４１Ａ、４１Ｂの第２梁フランジ４１ｄ及び梁リップ部４１ｅに面接触状態で当接している。 As described above, the connecting member 42 is arranged to straddle the ends of the pair of minor beams 41A, 41B. The connecting web 42a abuts in surface contact with the beam web 41a of the pair of minor beams 41A, 41B, the first connecting flange 42b and the connecting lip portion 42c abut in surface contact with the first beam flange 41b and the beam lip portion 41c of the pair of minor beams 41A, 41B, and the second connecting flange 42d and the connecting lip portion 42e abut in surface contact with the second beam flange 41d and the beam lip portion 41e of the pair of minor beams 41A, 41B.

そして、一対の小梁４１Ａ，４１Ｂ及び連結部材４２は、ボルト４３及びナット４４を使用して連結ウェブ４２ａ及び梁ウェブ４１ａが固定され、ボルト４５及びナット４６を使用して連結ウェブ４２ａ、梁ウェブ４１ａ及びクリップ８が固定されている。これら２本のボルト４３，４５の固定位置は、例えば第１実施形態の連続小梁部３と同様に、一対の小梁４１Ａ，４１Ｂの突き合わせ部分に近い位置と、この位置から離間した位置である。 The pair of small beams 41A, 41B and the connecting member 42 are fixed to the connecting web 42a and the beam web 41a using bolts 43 and nuts 44, and the connecting web 42a, the beam web 41a and the clip 8 are fixed to the connecting web 42a and the clip 8 using bolts 45 and nuts 46. The fixing positions of these two bolts 43, 45 are, for example, similar to the continuous small beam section 3 of the first embodiment, a position close to the butt portion of the pair of small beams 41A, 41B and a position spaced from this position.

本実施形態の連続小梁部４０によると、小梁４１Ａ，４１Ｂ及び連結部材４２を運搬する際には、オープンリップタイプのＺ形鋼を重ね合わせることで運搬スペースを小さくすることができるので、運搬性を良好とすることができる。また、施工直前まで、一対の小梁４１Ａ，４１Ｂ及び連結部材を重ね合わせておくことができるので、施工場所の部品スペースも小さくすることができる。 According to the continuous beam section 40 of this embodiment, when transporting the beams 41A, 41B and the connecting member 42, the transport space can be reduced by overlapping the open-lip type Z-shaped steel, which improves transportability. In addition, the pair of beams 41A, 41B and the connecting member can be overlapped until just before construction, which reduces the space required for parts at the construction site.

［第４実施形態の連続小梁部］
次に、図８は、第４実施形態の連続小梁部５０を示すものである。
本実施形態は、第１実施形態の連続小梁部３の変形であり、第１締結部１２及び第２締結部１３は、第１～第３ボルト１６，１８、２０及びナット１７，１９、２１の締め込みにより、一対の小梁１０Ａ、１０Ｂの突き合わせ部、連結部材１１及びクリップ８を固定している。
本実施形態が、第１実施形態と異なる構成は、第１締結部１２に離間して連結部材１１の一方の端部側に設けられている第３締結部５１と、第２締結部１３に離間して連結部材１１の他方の端部側に設けられている第４締結部５２である。
第３締結部５１は、上下方向に所定間隔をあけて一方の小梁１０Ａ及び連結部材１１をねじ込み固定している複数のタッピングネジ５３で構成されている。また、第４締結部５２も、上下方向に所定間隔をあけて他方の小梁１０Ｂ及び連結部材１１をねじ込み固定している複数のタッピングネジ５３で構成されている。 [Continuous beam portion of the fourth embodiment]
Next, FIG. 8 shows a continuous beam portion 50 according to a fourth embodiment.
This embodiment is a variation of the continuous beam portion 3 of the first embodiment, and the first fastening portion 12 and the second fastening portion 13 fix the butt portions of a pair of beams 10A, 10B, the connecting member 11, and the clip 8 by tightening the first to third bolts 16, 18, 20 and nuts 17, 19, 21.
The configuration in which this embodiment differs from the first embodiment is the third fastening portion 51 which is provided on one end side of the connecting member 11 and spaced apart from the first fastening portion 12, and the fourth fastening portion 52 which is provided on the other end side of the connecting member 11 and spaced apart from the second fastening portion 13.
The third fastening portion 51 is composed of a plurality of tapping screws 53 spaced apart in the vertical direction to screw in and fix the minor beam 10A and the connecting member 11 on one side. The fourth fastening portion 52 is also composed of a plurality of tapping screws 53 spaced apart in the vertical direction to screw in and fix the minor beam 10B and the connecting member 11 on the other side.

本実施形態の連続小梁部５０によると、タッピングネジ５３のねじ込みにより一対の小梁１０Ａ、１０Ｂ及び連結部材１１を固定する第３締結部５１及び第４締結部５２は、第４及び第５ボルト２２，２３及びナットを使用する第１実施形態の連続小梁部３と比較して、タッピングネジ５３のねじ込み施工が大幅に容易となるので、施工効率を向上させることができる。また、第３締結部５１及び第４締結部５２に多くの本数のタッピングネジ５３をねじ込み、第３締結部５１及び第４締結部５２の反力を増大させることができるので、連結部材１１の長手方向の長さを短くしても剛性を保持することができ、部品の小型化及び軽量化を図ることができる。 According to the continuous beam section 50 of this embodiment, the third fastening section 51 and the fourth fastening section 52, which fix the pair of beams 10A, 10B and the connecting member 11 by screwing in the tapping screws 53, are significantly easier to screw in the tapping screws 53 than the continuous beam section 3 of the first embodiment, which uses the fourth and fifth bolts 22, 23 and nuts, and therefore construction efficiency can be improved. In addition, since a large number of tapping screws 53 can be screwed into the third fastening section 51 and the fourth fastening section 52 to increase the reaction force of the third fastening section 51 and the fourth fastening section 52, the rigidity can be maintained even if the longitudinal length of the connecting member 11 is shortened, and the parts can be made smaller and lighter.

なお、上述した第１実施形態の連続小梁部３では、一対の小梁１０Ａ，１０Ｂ及び連結部材１１を固定する固定手段としてボルト及びナットを使用し、第４実施形態の連続小梁部５０では、一対の小梁１０Ａ，１０Ｂ及び連結部材１１を固定する固定手段としてタッピングネジ５３を使用したが、溶接による固定を採用しても、一対の小梁１０Ａ，１０Ｂ及び連結部材１１からなる連続小梁部を、十分な曲げ耐力を有する構造部材として使用することができる。 In the above-mentioned first embodiment of the continuous beam section 3, bolts and nuts are used as a fixing means for fixing the pair of beams 10A, 10B and the connecting member 11, and in the fourth embodiment of the continuous beam section 50, tapping screws 53 are used as a fixing means for fixing the pair of beams 10A, 10B and the connecting member 11. However, even if fixing by welding is adopted, the continuous beam section consisting of the pair of beams 10A, 10B and the connecting member 11 can be used as a structural member with sufficient bending strength.

１屋根構造
２大梁
３連続小梁部（連続構造梁）
４ウェブ
５上部フランジ
６下部フランジ
８クリップ
８ａ小梁支持板
８ｂ大梁接続板
９支持部
１０Ａ小梁（第１構造梁）
１０Ｂ小梁（第２構造梁）
１０ａ梁ウェブ（梁側固定部）
１０ｂ第１梁フランジ
１０ｃ梁リップ部
１０ｄ第２梁フランジ
１０ｅ梁リップ部
１１連結部材
１１ａ連結ウェブ（連結側固定部）
１１ｂ第１連結フランジ
１１ｃ連結リップ部
１１ｄ第２連結フランジ
１１ｅ連結リップ部
１１ｆ貫通孔
１２第１締結部（第１固定部）
１３第２締結部（第２固定部）
１４第３締結部（第３固定部）
１５第４締結部（第４固定部）
１６第１ボルト
１７第１ナット
１８第２ボルト
１９第２ナット
２０第３ボルト
２０ａボルト頭部
２１第３ナット
２２第４ボルト
２３第５ボルト
３０連続小梁部
３１第１締結部（第１固定部）
３２第２締結部
３３第３締結部（第２固定部）
３４第４締結部
３５第５締結部
３６第６締結部（第３固定部）
３７第７締結部
３８第８固定部（第４固定部）
４０連続小梁部（連続構造梁）
４１Ａ小梁（第１構造梁）
４１Ｂ小梁（第２構造梁）
４１ａ梁ウェブ（梁側固定部）
４１ｂ第１梁フランジ
４１ｃ梁リップ部
４１ｄ第２梁フランジ
４１ｅ梁リップ部
４２連結部材
４２ａ連結ウェブ（連結側固定部）
４２ｂ第１連結フランジ
４２ｃ連結リップ部
４２ｄ第２連結フランジ
４２ｅ連結リップ部
５０連続小梁部（連続構造梁）
５１第３締結部（第３固定部）
５２第４締結部（第４固定部）
５３タッピングネジ 1 Roof structure 2 Large beam 3 Continuous small beam (continuous structural beam)
4 Web 5 Upper flange 6 Lower flange 8 Clip 8a Sub-beam support plate 8b Main beam connection plate 9 Support portion 10A Sub-beam (first structural beam)
10B Small beam (second structural beam)
10a Beam web (beam side fixing part)
10b First beam flange 10c Beam lip portion 10d Second beam flange 10e Beam lip portion 11 Connecting member 11a Connecting web (connecting side fixed portion)
11b First connecting flange 11c Connecting lip portion 11d Second connecting flange 11e Connecting lip portion 11f Through hole 12 First fastening portion (first fixing portion)
13 Second fastening part (second fixing part)
14 Third fastening part (third fixing part)
15 Fourth fastening part (fourth fixed part)
16 First bolt 17 First nut 18 Second bolt 19 Second nut 20 Third bolt 20a Bolt head 21 Third nut 22 Fourth bolt 23 Fifth bolt 30 Continuous beam portion 31 First fastening portion (first fixing portion)
32 Second fastening part 33 Third fastening part (second fixing part)
34 Fourth fastening part 35 Fifth fastening part 36 Sixth fastening part (third fixing part)
37 Seventh fastening part 38 Eighth fixing part (fourth fixing part)
40 Continuous beam section (continuous structural beam)
41A Small beam (first structural beam)
41B Small beam (second structural beam)
41a Beam web (beam side fixing part)
41b First beam flange 41c Beam lip portion 41d Second beam flange 41e Beam lip portion 42 Connecting member 42a Connecting web (connecting side fixed portion)
42b: First connecting flange 42c: Connecting lip portion 42d: Second connecting flange 42e: Connecting lip portion 50: Continuous beam portion (continuous structural beam)
51 Third fastening part (third fixing part)
52 Fourth fastening part (fourth fixed part)
53 Tapping screw

Claims

A roof structure in which a continuous structural beam is fixed to a main beam as a purlin supporting a roof material,
the continuous structural beam comprises a first structural beam and a second structural beam arranged in a line with one end of each beam butted against each other, and a connecting member arranged across one ends of the first structural beam and the second structural beam, and comprises at least a first fixing portion that fixes the one end of the first structural beam and the connecting member, a second fixing portion that fixes the one end of the second structural beam and the connecting member, a third fixing portion that fixes the first structural beam and the connecting member at a position spaced from the first fixing portion toward the other end of the first structural beam, and a fourth fixing portion that fixes the second structural beam and the connecting member at a position spaced from the second fixing portion toward the other end of the second structural beam,
a resistance moment generated by a reaction force generated between the first fixed portion and the third fixed portion and a resistance moment generated by a reaction force generated between the second fixed portion and the fourth fixed portion are opposed to a bending moment in a positive direction and a bending moment in a negative direction acting on the first structural beam and the second structural beam,
A clip is provided by bending a metal plate that fixes the continuous structural beam to the upper part of the main beam into an L-shape and having a sub-beam support plate and a main beam connection plate,
a girder connecting plate of the clip is fixed to an upper portion of the girder by intersecting the girder at a lower portion of a position where the one end portions of the first structural beam and the second structural beam are butted against each other;
A roof structure characterized in that the beam side fixing portion extending in the vertical direction at one end side of the first structural beam and the second structural beam is in face-to-face contact with the connecting side fixing portion extending in the vertical direction of the connecting member, and the small beam support plate of the clip is in face-to-face contact with the beam side fixing portion, and the beam side fixing portion, the connecting side fixing portion and the small beam support plate are fixed by multiple fixing means.

The roof structure according to claim 1, characterized in that the first to fourth fixing parts are fixed to the beam side fixing part and the connection side fixing part by a plurality of fixing means spaced apart in the vertical direction.

3. The roof structure according to claim 2, wherein the fastening means is at least one of a bolt fastening means and a weld fastening means .

The roof structure according to any one of claims 1 to 3, characterized in that the first structural beam and the second structural beam are made of Z-shaped steel, U-shaped steel, L-shaped steel, H-shaped steel, or steel pipes.

The roof structure according to any one of claims 1 to 4, characterized in that the connecting member is composed of any one of Z-shaped steel, C-shaped steel, U-shaped steel, L-shaped steel, H-shaped steel, and steel pipe.

The roof structure according to any one of claims 1 to 5, characterized in that when the height of the first structural beam and the second structural beam is H1, and the distance between the first fixed part and the third fixed part and the distance between the second fixed part and the fourth fixed part are L, the relationship is L/H1 ≧ 2.5.