JP7627607B2

JP7627607B2 - Joint structure of structural members

Info

Publication number: JP7627607B2
Application number: JP2021070445A
Authority: JP
Inventors: 寛増子; 晃一エキ田; 邦夫 ▲高▼林; 真理恵齋藤; 浩幸青木; 佳伸熊川; 瑛一黒田; 護間中
Original assignee: Sumitomo Forestry Co Ltd; Kumagai Gumi Co Ltd
Current assignee: Sumitomo Forestry Co Ltd; Kumagai Gumi Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2025-02-06
Anticipated expiration: 2041-04-19
Also published as: JP2022165195A

Description

本発明は、第１の荷重支持部と当該第１の荷重支持部の表面を覆う第１の耐火被覆部とを有した第１の構造部材と、第２の荷重支持部と当該第２の荷重支持部の表面を覆う第２の耐火被覆部とを有した第２の構造部材とを接合するための、構造部材の接合構造に関する。 The present invention relates to a joining structure for structural members for joining a first structural member having a first load-bearing portion and a first fire-resistant coating portion covering the surface of the first load-bearing portion, and a second structural member having a second load-bearing portion and a second fire-resistant coating portion covering the surface of the second load-bearing portion.

鋼製の第１構造部材と、荷重を支持する木製の心材と当該心材の周囲を取り囲む燃え止まり層とを備えた第２構造部材と、燃え止まり層を介さずに心材に固定され、第１構造部材と第２構造部材とを接合し、第１構造部材から心材へ及び心材から第１構造部材へ力を伝える接合部材と、第１構造部材を覆い、当該第１構造部材から心材へ伝達される熱を心材が燃焼しない温度にする被覆層とを有する構造部材の接合構造が知られている（特許文献１等参照）。 A joining structure for structural members is known, which has a first structural member made of steel, a second structural member having a wooden core that supports a load and a fire-retardant layer surrounding the core, a joining member that is fixed to the core without a fire-retardant layer, joins the first structural member to the second structural member, and transmits forces from the first structural member to the core and from the core to the first structural member, and a coating layer that covers the first structural member and adjusts the heat transferred from the first structural member to the core to a temperature at which the core will not burn (see Patent Document 1, etc.).

特許第５９９０４２５号公報Patent No. 5990425

特許文献１に開示された構造部材の接合構造では、接合部材が、燃え止まり層を介さずに心材に固定されて、第１構造部材と第２構造部材とを接合し、第１構造部材から心材へ及び心材から第１構造部材へ力を伝えるように構成されている。
つまり、特許文献１では、心材（木質柱）と梁（金属質梁（Ｈ形鋼））とを接合するための接合部材としてのガセットプレート（接合板）を、固定手段としてのボルト及びナットを使用して心材に固定した構造である。
このように、接合部材を、燃え止まり層を介さずに心材に固定して、かつ、心材の表面全体に燃え止まり層及び燃え代層を確実に設けられるようにするために、特許文献１においては、接合部材を心材に固定するための固定手段としてのボルトの一端部及びナットが心材の表面に突出しないようにする構成として、心材の表面に当該固定手段を収容するための凹部を形成するようにしている。
即ち、特許文献１に開示された構造部材の接合構造によれば、接合部材を、燃え止まり層を介さずに心材に固定する構造としているため、第２構造部材の荷重支持部としての心材の表面に、固定手段を収容する凹部を形成するための座繰り加工が必要となり、加工手間、加工コストが増えるという課題があった。
本発明は、上述した課題に鑑みて、第１の荷重支持部と当該第１の荷重支持部の表面を覆う第１の耐火被覆部とを有した第１の構造部材と、第２の荷重支持部と当該第２の荷重支持部の表面を覆う第２の耐火被覆部とを有した第２の構造部材とを接合する接合構造において、第２の荷重支持部の加工手間、加工コストを削減できる構造部材の接合構造を提供するものである。 In the joining structure of structural members disclosed in Patent Document 1, the joining member is fixed to the core material without a fire-retardant layer, joins the first structural member and the second structural member, and is configured to transmit force from the first structural member to the core material and from the core material to the first structural member.
In other words, the structure disclosed in Patent Document 1 has a gusset plate (joining plate) as a joining member for joining a core material (wooden column) and a beam (metal beam (H-shaped steel)), which is fixed to the core material using bolts and nuts as fixing means.
In this way, in order to fix the joining member to the core material without a fire-retardant layer and to ensure that a fire-retardant layer and a substitute fire layer are provided over the entire surface of the core material, Patent Document 1 configures the joining member to be fixed to the core material by forming a recess on the surface of the core material to accommodate one end of the bolt and the nut, which serve as fixing means, so that the end of the bolt and the nut do not protrude from the surface of the core material.
In other words, according to the joining structure of structural members disclosed in Patent Document 1, the joining member is fixed to the core material without a fire-retardant layer, so countersinking is required to form a recess to accommodate the fixing means on the surface of the core material serving as the load-bearing part of the second structural member, resulting in an increase in processing effort and costs.
In view of the above-mentioned problems, the present invention provides a joining structure for structural members that joins a first structural member having a first load-supporting portion and a first fire-resistant coating portion covering the surface of the first load-supporting portion, and a second structural member having a second load-supporting portion and a second fire-resistant coating portion covering the surface of the second load-supporting portion, which can reduce the processing labor and processing costs of the second load-supporting portion.

本発明に係る構造部材の接合構造は、第１の荷重支持部と、第１の荷重支持部の表面を覆うように設けられた第１の耐火被覆部とを有した第１の構造部材と、第２の荷重支持部と、第２の荷重支持部の表面を覆うように設けられた第２の耐火被覆部とを有した第２の構造部材と、第１の構造部材と第２の構造部材とを接合する接合手段とを備え、第１の荷重支持部と第２の荷重支持部とが、それぞれ、異なる材料により形成された荷重支持部であって、第１の荷重支持部は金属質柱又は金属質梁、第２の荷重支持部は木質梁であり、接合手段は、接合板と、固定手段とを備え、接合板は、木質梁の梁端部の一方の側面を覆うように設けられた第２の耐火被覆部の表面に沿って設けられた一方接合板と、木質梁の梁端部の一方の側面と対向する他方の側面を覆うように設けられた第２の耐火被覆部の表面に沿って設けられた他方接合板とを備え、固定手段は、一方接合板の一端側又は他方接合板の一端側を第１の荷重支持部に固定する第１固定手段と、一方接合板の他端側及び他方接合板の他端側を第２の構造部材に固定する第２固定手段とを備え、第２固定手段は、木質梁の梁端部の一方の側面を覆う第２の耐火被覆部の表面と木質梁の梁端部の他方の側面を覆う第２の耐火被覆部の表面との間の梁端部及び第２の耐火被覆部を貫通するように第２の構造部材に形成された構造部材側貫通孔と、一方接合板の他端側及び他方接合板の他端側に形成された接合板側貫通孔とを連通させて構成された軸材通し用貫通孔と、軸材通し用貫通孔を貫通するように設けられた軸材と、軸材通し用貫通孔を貫通させた軸材に締結された締結部材とを備え、第１固定手段により、一方接合板の一端側及び他方接合板の一端側が第１の耐火被覆部を介さずに第１の荷重支持部に接触した状態で第１の荷重支持部に接合され、かつ、第２固定手段により、一方接合板の他端側の板面及び他方接合板の他端側の板面が第２の耐火被覆部を介して第２の耐火被覆部の表面に接触した状態で第２の荷重支持部に接合され、さらに、第１の耐火被覆部は、第２の耐火被覆部の表面に露出する、一方接合板の他端側、他方接合板の他端側、軸材、締結部材の表面を覆うように形成されたことを特徴とする。
また、互いに対向する第１の荷重支持部と第２の耐火被覆部との間を空間を介して離間させたことを特徴とする。
また、一方接合板及び他方接合板は、縦方向に長く当該縦方向と直交する横方向に沿った断面がＬ字状の鋼板により形成されたことを特徴とする。
また、一方接合板の縦方向に所定の間隔を隔てて設けられた複数個の接合板側貫通孔と、他方接合板の縦方向に所定の間隔を隔てて設けられた複数個の接合板側貫通孔と、第２の構造部材に形成された複数個の構造部材側貫通孔とによって、複数の軸材通し用貫通孔が構成され、当該複数の各軸材通し用貫通孔にそれぞれ軸材が貫通するように設けられたことを特徴とする。
また、第２の耐火被覆部が石こうボードを含む１層以上の耐火被覆層により構成されたことを特徴とする。
本発明に係る構造部材の接合構造によれば、第２の荷重支持部の加工手間、加工コストを削減できるようになる。
第１の荷重支持部と第２の荷重支持部と間の熱の伝達を、より効果的に抑制できるようになる。
さらに、耐火性能、施工性を向上できる。 The joining structure of structural members according to the present invention comprises a first structural member having a first load-bearing portion and a first fire-resistant covering portion provided so as to cover the surface of the first load-bearing portion, a second structural member having a second load-bearing portion and a second fire-resistant covering portion provided so as to cover the surface of the second load-bearing portion, and joining means for joining the first structural member and the second structural member, wherein the first load-bearing portion and the second load-bearing portion are respectively load-bearing portions formed of different materials , the first load-bearing portion being a metal column or metal beam, and the second load-bearing portion being a wood column or metal beam. The wooden beam is a jointing means comprising a jointing plate and a fixing means, the jointing plate comprising a first jointing plate provided along a surface of a second fire-resistant covering portion provided so as to cover one side surface of the beam end of the wooden beam, and a second jointing plate provided along a surface of the second fire-resistant covering portion provided so as to cover the other side surface opposite to the one side surface of the beam end of the wooden beam, the fixing means comprising a first fixing means for fixing one end side of the first jointing plate or one end side of the other jointing plate to the first load supporting portion, and a second fixing means for fixing the other end side of the first jointing plate and the other end side of the other jointing plate to the second structural member. the second fixing means comprises a structural member-side through hole formed in the second structural member so as to penetrate the beam end between a surface of the second fire-resistant covering part covering one side of the beam end of the wooden beam and a surface of the second fire-resistant covering part covering the other side of the beam end of the wooden beam and the second fire-resistant covering part, a through hole for passing an axle formed by communicating a joint plate-side through hole formed on the other end side of the one joint plate and a joint plate-side through hole formed on the other end side of the other joint plate, a shaft provided to pass through the through hole for passing an axle, and a fastening member fastened to the shaft passing through the through hole for passing an axle, By this, one end side of the one joining plate and one end side of the other joining plate are joined to the first load supporting portion in a state of contact with the first load supporting portion without the first fire-resistant coating portion, and by the second fixing means, the plate surface of the other end side of the one joining plate and the plate surface of the other end side of the other joining plate are joined to the second load supporting portion in a state of contact with the surface of the second fire-resistant coating portion via the second fire-resistant coating portion , and further, the first fire-resistant coating portion is formed so as to cover the surfaces of the other end side of the one joining plate, the other end side of the other joining plate, the shaft material, and the fastening member, which are exposed on the surface of the second fire-resistant coating portion.
The first load supporting portion and the second fire-resistant covering portion, which face each other, are separated from each other by a space .
The first joining plate and the second joining plate are characterized in that they are formed from steel plates that are long in the vertical direction and have an L-shaped cross section along a horizontal direction perpendicular to the vertical direction .
The present invention is also characterized in that a plurality of through holes for passing a shaft material are formed by a plurality of joining plate side through holes provided at a predetermined interval in the vertical direction of one joining plate, a plurality of joining plate side through holes provided at a predetermined interval in the vertical direction of the other joining plate, and a plurality of structural member side through holes formed in the second structural member, and a shaft material is arranged to pass through each of the plurality of through holes for passing a shaft material .
The second fire-resistant coating portion is characterized in that it is composed of one or more fire-resistant coating layers including a gypsum board.
According to the joining structure of structural members of the present invention, it is possible to reduce the processing effort and costs of the second load supporting portion.
This makes it possible to more effectively suppress the transfer of heat between the first load support portion and the second load support portion.
Furthermore, fire resistance and ease of construction can be improved.

第１の荷重支持部としての金属質柱を有した第１の構造部材と第２の荷重支持部としての木質梁を有した第２の構造部材との接合構造を示す斜視図（実施形態１）。FIG. 1 is a perspective view showing a joint structure between a first structural member having a metal column as a first load-supporting portion and a second structural member having a wooden beam as a second load-supporting portion (first embodiment). 第１の構造部材と第２の構造部材との接合構造を示す横断面図（実施形態１）。FIG. 2 is a cross-sectional view showing a joint structure between a first structural member and a second structural member (first embodiment). 図２のＡ－Ａ断面図（縦断面図）（実施形態１）。FIG. 3 is a cross-sectional view (longitudinal cross-sectional view) taken along line AA in FIG. 2 (first embodiment).

実施形態１
実施形態１に係る構造部材の接合構造は、図１乃至図３に示すように、第１の荷重支持部と当該第１の荷重支持部の表面を覆う第１の耐火被覆部とを有した第１の構造部材１と、第２の荷重支持部と当該第２の荷重支持部の表面を覆う第２の耐火被覆部とを有した第２の構造部材２と、第１の構造部材１と第２の構造部材２とを接合する接合手段３とを備え、接合手段３は、一端側が第１の耐火被覆部を介さずに第１の荷重支持部に接合され、他端側が第２の耐火被覆部を介して第２の荷重支持部に接合された接合構造とした。
また、第１の荷重支持部と第２の荷重支持部とが、それぞれ、異なる材料により形成された荷重支持部であり、実施形態１に係る構造部材の接合構造では、荷重を支持する第１の荷重支持部としての例えば断面ロ字状の鋼管柱等の中空の金属質柱１０と荷重を支持する第２の荷重支持部としての例えば木質梁２０とが接合手段３により接合される。 EMBODIMENT 1
As shown in Figures 1 to 3, the joining structure of structural members in embodiment 1 includes a first structural member 1 having a first load-supporting portion and a first fire-resistant coating portion covering the surface of the first load-supporting portion, a second structural member 2 having a second load-supporting portion and a second fire-resistant coating portion covering the surface of the second load-supporting portion, and joining means 3 for joining the first structural member 1 and the second structural member 2, wherein one end of the joining means 3 is joined to the first load-supporting portion without the first fire-resistant coating portion and the other end is joined to the second load-supporting portion via the second fire-resistant coating portion.
In addition, the first load-supporting portion and the second load-supporting portion are each load-supporting portions formed from different materials, and in the joining structure of a structural member in embodiment 1, a hollow metallic column 10, for example a steel pipe column with a square cross-section, as the first load-supporting portion that supports the load, and a wooden beam 20, for example, as the second load-supporting portion that supports the load, are joined by joining means 3.

第１の構造部材１は、第１の荷重支持部としての金属質柱１０と、当該金属質柱１０の表面を覆うように設けられた第１の耐火被覆部１１とを備えた構成とした。 The first structural member 1 is configured to include a metal column 10 as a first load-bearing portion, and a first fire-resistant coating portion 11 provided to cover the surface of the metal column 10.

第１の耐火被覆部１１は、例えば金属質柱１０の表面を覆うように設けられた石こうボード等の耐火板による耐火被覆層、あるいは、ロックウールとセメントとを混ぜ合わせた耐火被覆材を金属質柱１０の表面に吹き付けて形成された耐火被覆層等により構成される。
尚、第１の耐火被覆部１１を石こうボード等の耐火板による耐火被覆層で構成した場合には、第１の耐火被覆部１１の表面には、表面仕上げ材を設けることが好ましいが、当該表面仕上げ材は設けなくても良い。 The first fire-resistant coating portion 11 is composed of, for example, a fire-resistant coating layer made of a fire-resistant board such as a gypsum board arranged to cover the surface of the metal column 10, or a fire-resistant coating layer formed by spraying a fire-resistant coating material made of a mixture of rock wool and cement onto the surface of the metal column 10.
Furthermore, when the first fire-resistant covering portion 11 is constructed as a fire-resistant covering layer made of a fire-resistant board such as gypsum board, it is preferable to provide a surface finishing material on the surface of the first fire-resistant covering portion 11, but it is not necessary to provide such a surface finishing material.

第２の構造部材２は、第２の荷重支持部としての木質梁２０と、当該木質梁２０の表面を覆うように設けられた第２の耐火被覆部２１とを備えた構成とした。 The second structural member 2 is configured to include a wooden beam 20 as a second load-bearing portion and a second fire-resistant coating portion 21 arranged to cover the surface of the wooden beam 20.

木質梁２０は、例えば、ＣＬＴ（Cross Laminated Timber（直交集成板））又は集成材又はＬＶＬ（Laminated Veneer Lumber（単層積層材））又は無垢材等の木により形成された梁である。
尚、ＣＬＴとは、農林水産省告示第３０７９号に規定されたように、「ひき板又は小角材（これらをその繊維方向を互いにほぼ平行にして長さ方向に接合接着して調整したものを含む。）をその繊維方向を互いにほぼ平行にして幅方向に並べ又は接着したものを、主としてその繊維方向を互いにほぼ直角にして積層接着し３層以上の構造を持たせた一般材」である。
即ち、ＣＬＴは、一般に、張り合わせる板の繊維方向が直交するように複数の板を張り合わせて構成された木材であり、直交集成板と呼ばれている。
また、集成材は、一般に、張り合わせる板の繊維方向が並行方向となるように複数の板を張り合わせて構成された木材である。
また、ＬＶＬは、一般に、複数の単板（ベニヤ）を、単板の繊維方向に平行に積層して接着した木材である。 The wooden beam 20 is a beam made of wood such as CLT (Cross Laminated Timber), laminated timber, LVL (Laminated Veneer Lumber), or solid wood.
Additionally, CLT, as defined in Notification No. 3079 of the Ministry of Agriculture, Forestry and Fisheries, is "a general material made by arranging or gluing planks or small square timber (including those which have been adjusted by joining and gluing them lengthwise with their grain directions roughly parallel to each other) in the width direction with their grain directions roughly parallel to each other, and then laminating and gluing them together mainly with their grain directions roughly perpendicular to each other to create a structure of three or more layers."
That is, CLT is generally a type of wood constructed by gluing together multiple boards so that the grain directions of the boards cross at right angles, and is known as cross-laminated timber.
Generally, laminated lumber is wood made by bonding together a number of boards so that the grain directions of the boards are parallel to each other.
Moreover, LVL is generally a wood material in which a plurality of veneer panels are laminated and glued together in a manner that is parallel to the grain direction of the veneer panels.

木質梁２０の梁端部２０ｅ，２０ｅには、一方の側面２２Ｘ、及び、当該一方の側面２２Ｘと対向する他方の側面２２Ｙに亘って貫通する梁貫通孔２６が形成されている。
当該梁貫通孔２６は、後述する軸材としてのボルト６を貫通させるための貫通孔である。当該梁貫通孔２６は、梁端部２０ｅの梁成方向に沿って所定の間隔を隔てて複数形成されている。
また、木質梁２０の上端面２５の上には、上階の床スラブＦが形成される。 A beam through hole 26 is formed in each of the beam ends 20e, 20e of the wooden beam 20, penetrating from one side surface 22X to the other side surface 22Y opposite the one side surface 22X.
The beam through holes 26 are through holes for passing bolts 6 serving as shaft members, which will be described later. A plurality of the beam through holes 26 are formed at predetermined intervals along the beam configuration direction of the beam end portion 20e.
In addition, a floor slab F of the upper floor is formed on the upper end surface 25 of the wooden beam 20.

第２の耐火被覆部２１は、木質梁２０の両方の側面、即ち、一方の側面２２Ｘと他方の側面２２Ｙと下面２３と梁端面２４とを覆う耐火被覆層により構成される。
当該第２の耐火被覆部２１は、例えば一層以上の石こうボード等の耐火部材により構成すればよい。
当該第２の耐火被覆部２１は、具体的には、例えば、石こうボードと石こうボードとの間に断熱性（耐火性）を有した板（以下、耐熱耐火パネルという）を設けた積層構造の耐火被覆層とした。即ち、木質梁２０の互いに対向する両方の梁側面２２Ｘ，２２Ｙ、木質梁２０の下面２３、及び、木質梁２０の梁端面２４，２４に、所定厚さの石こうボードを取付けた１層目の被覆層を形成するとともに、当該１層目の被覆層の表面に断熱耐火パネルを取付けた２層目の被覆層を形成し、当該２層目の被覆層の表面に所定厚さの石こうボードを取付けた３層目の被覆層を形成した耐火被覆構造、つまり、３層構造の耐火被覆層により構成された耐火被覆部とした。
尚、第２の耐火被覆部２１の表面には、表面仕上げ材を設けることが好ましいが、表面仕上げ材は設けなくても良い。
また、第２の耐火被覆部２１は、必ずしも３層構造である必要はなく、２層構造、単層構造、多層構造であってもかまわない。
即ち、第２の耐火被覆部２１を、石こうボードを含む１層以上の耐火被覆層により構成したことにより、耐火性能、施工性を向上できる。 The second fire-resistant coating portion 21 is composed of a fire-resistant coating layer that covers both sides of the wooden beam 20, i.e., one side 22X, the other side 22Y, the bottom surface 23, and the beam end surface 24.
The second fire-resistant covering portion 21 may be made of a fire-resistant material such as one or more layers of gypsum board.
Specifically, the second fire-resistant covering portion 21 is a laminated fire-resistant covering layer in which, for example, a plate having heat insulation (fire resistance) is provided between gypsum boards (hereinafter, referred to as a heat-resistant and fire-resistant panel). That is, a first covering layer is formed by attaching a gypsum board of a predetermined thickness to both opposing beam side surfaces 22X, 22Y of the wooden beam 20, the lower surface 23 of the wooden beam 20, and the beam end surfaces 24, 24 of the wooden beam 20, a second covering layer is formed by attaching a heat-insulating fire-resistant panel to the surface of the first covering layer, and a third covering layer is formed by attaching a gypsum board of a predetermined thickness to the surface of the second covering layer, that is, a fire-resistant covering portion constituted by a three-layered fire-resistant covering layer.
It is preferable to provide a surface finishing material on the surface of the second fire-resistant covering portion 21, but it is not necessary to provide a surface finishing material.
Furthermore, the second fire-resistant covering portion 21 does not necessarily have to have a three-layer structure, and may have a two-layer structure, a single-layer structure, or a multi-layer structure.
That is, by forming the second fire-resistant covering portion 21 from one or more fire-resistant covering layers including a gypsum board, it is possible to improve the fire resistance and workability.

接合手段３は、接合板と、固定手段とを備える。
接合板は、木質梁２０の梁端部２０ｅの一方の側面２２Ｘを覆うように設けられた第２の耐火被覆部２１の表面に板面が接触するように設置された一方接合板４と、木質梁２０の梁端部２０ｅの他方の側面２２Ｙを覆うように設けられた第２の耐火被覆部２１の表面に板面が接触するように設置された他方接合板５とを備える。
固定手段は、一方接合板４の一端側４１又は他方接合板５の一端側５１を金属質柱１０（第１の荷重支持部）に固定する第１固定手段と、一方接合板４の他端側４２及び他方接合板５の他端側５２を第２の構造部材２に固定する第２固定手段とを備える。 The joining means 3 includes a joining plate and a fixing means.
The joint plate comprises a first joint plate 4 installed so that its plate surface contacts the surface of the second fire-resistant coating portion 21 provided to cover one side 22X of the beam end 20e of the wooden beam 20, and a second joint plate 5 installed so that its plate surface contacts the surface of the second fire-resistant coating portion 21 provided to cover the other side 22Y of the beam end 20e of the wooden beam 20.
The fixing means includes a first fixing means for fixing one end side 41 of the first joining plate 4 or one end side 51 of the other joining plate 5 to the metal column 10 (first load-supporting portion), and a second fixing means for fixing the other end side 42 of the first joining plate 4 and the other end side 52 of the other joining plate 5 to the second structural member 2.

一方接合板４は、例えば縦方向（木質梁２０の梁成に沿った方向（梁成方向））に長く当該縦方向と直交する横方向（梁の延長方向）に沿った断面がＬ字状の鋼板により形成される。
同様に、他方接合板５は、例えば縦方向に長く当該縦方向と直交する横方向に沿った断面がＬ字状の鋼板により形成される。
言い換えれば、一方接合板４及び他方接合板５は、木質梁２０の梁成に沿った縦方向に長い長方形の平鋼板の一方の長辺側の部分を当該一方の長辺と平行な折曲線に沿って折り曲げて、当該折り曲げられた一方の長辺側の部分の板面と他方の長辺側の部分の板面との成す角度が直角又は略直角になるように形成されたＬ形鋼板により構成される。 On the other hand, the joint plate 4 is formed, for example, from a steel plate that is elongated in the vertical direction (the direction along the beam configuration of the wooden beam 20 (beam configuration direction)) and has an L-shaped cross section along the horizontal direction (extension direction of the beam) perpendicular to the vertical direction.
Similarly, the other joining plate 5 is formed, for example, from a steel plate that is long in the vertical direction and has an L-shaped cross section along a horizontal direction perpendicular to the vertical direction.
In other words, the one connecting plate 4 and the other connecting plate 5 are composed of an L-shaped steel plate formed by bending one long side of a rectangular flat steel plate that is vertically long along the beam configuration of the wooden beam 20 along a bend curve parallel to the one long side, so that the angle between the plate surface of the bent one long side and the plate surface of the other long side is a right angle or approximately a right angle.

一方接合板４は、一端側４１となる一方の長辺側の部分の板面と金属質柱１０の一側面１２とを接触させた状態で、第１固定手段としての溶接によって、金属質柱１０に固定される。
尚、金属質柱１０の一側面１２とは、木質梁２０の梁端面２４と対向する面である。
同様に、他方接合板５は、一端側５１となる一方の長辺側の部分の板面と金属質柱１０の一側面１２とを接触させた状態で、第１固定手段としての溶接によって、金属質柱１０に固定される。
また、一方接合板４は、他端側４２となる他方の長辺側の部分の板面が、木質梁２０の梁端部２０ｅの一方の側面２２Ｘを覆うように設けられた第２の耐火被覆部２１の表面に沿って対向するように設けられて、当該他端側４２となる他方の長辺側の部分の板面と当該第２の耐火被覆部２１の表面とが接触状態となるように、第２固定手段によって、第２の構造部材２の梁端部２０ｅ側に固定される。
同様に、他方接合板５は、他端側５２となる他方の長辺側の部分の板面が、木質梁２０の梁端部２０ｅの一方の側面２２Ｙを覆うように設けられた第２の耐火被覆部２１の表面に沿って対向するように設けられて、当該他端側５２となる他方の長辺側の部分の板面と当該第２の耐火被覆部２１の表面とが接触状態となるように、第２固定手段によって、第２の構造部材２の梁端部２０ｅ側に固定される。 On the other hand, the joining plate 4 is fixed to the metal column 10 by welding as a first fixing means, with the plate surface of one long side portion, which is one end side 41, in contact with one side surface 12 of the metal column 10.
In addition, one side surface 12 of the metal column 10 is the surface facing the beam end surface 24 of the wooden beam 20.
Similarly, the other joining plate 5 is fixed to the metal column 10 by welding as a first fixing means, with the plate surface of one long side portion, which is one end side 51, in contact with one side surface 12 of the metal column 10.
In addition, the one joint plate 4 is arranged so that the plate surface of the other long side portion, which is the other end side 42, faces along the surface of the second fire-resistant coating portion 21 that is arranged to cover one side 22X of the beam end portion 20e of the wooden beam 20, and is fixed to the beam end portion 20e side of the second structural member 2 by the second fixing means so that the plate surface of the other long side portion, which is the other end side 42, and the surface of the second fire-resistant coating portion 21 are in contact with each other.
Similarly, the other joining plate 5 is arranged so that the plate surface of the other long side portion, which is the other end side 52, faces along the surface of the second fire-resistant coating portion 21 that is arranged to cover one side 22Y of the beam end 20e of the wooden beam 20, and is fixed to the beam end 20e side of the second structural member 2 by the second fixing means so that the plate surface of the other long side portion, which is the other end side 52, and the surface of the second fire-resistant coating portion 21 are in contact with each other.

第２固定手段は、第２の構造部材２に形成された構造部材側貫通孔と一方接合板４の他端側４２に形成された接合板側貫通孔６６と他方接合板５の他端側４２に形成された接合板側貫通孔６６とで構成された軸材通し用貫通孔としてのボルト通し用貫通孔と、ボルト通し用貫通孔を貫通させた軸材としてのボルト６と、一方接合板４の他端側４２の接合板側貫通孔６６を貫通させて外方に突出させたボルト６の一端側６１及び一方接合板４の他端側４２に締結された締結部材としてのナット４５と、他方接合板５の他端側５２の接合板側貫通孔６６を貫通させて外方に突出させたボルト６の他端側６２及び他方接合板５の他端側５２に締結された締結部材としてのナット５５とを備えて構成される。
尚、ナット４５、ナット５５としては、ダブルナットを用いることが好ましい。 The second fixing means is composed of a bolt-passing through hole as a through hole for passing the shaft material, which is composed of a structural member side through hole formed in the second structural member 2, a joining plate side through hole 66 formed in the other end side 42 of one joining plate 4, and a joining plate side through hole 66 formed in the other end side 42 of the other joining plate 5, a bolt 6 as a shaft material passing through the bolt-passing through hole, a nut 45 as a fastening member fastened to one end side 61 of the bolt 6 that passes through the joining plate side through hole 66 of the other end side 42 of one joining plate 4 and protrudes outward, and the other end side 42 of one joining plate 4, and a nut 55 as a fastening member fastened to the other end side 62 of the bolt 6 that passes through the joining plate side through hole 66 of the other end side 52 of the other joining plate 5 and protrudes outward, and the other end side 52 of the other joining plate 5.
It is preferable to use double nuts as the nuts 45 and 55.

構造部材側貫通孔は、木質梁２０の梁端部２０ｅの一方の側面２２Ｘと他方の側面２２Ｙとに亘って貫通するように形成された梁貫通孔２６と、木質梁２０の梁端部２０ｅの一方の側面２２Ｘを覆う第２の耐火被覆部２１を貫通するように形成された被覆部貫通孔２１ａと、木質梁２０の梁端部２０ｅの他方の側面２２Ｙを覆う第２の耐火被覆部２１を貫通するように形成された被覆部貫通孔２１ａとが連通するように設けられて構成される。
そして、当該構造部材側貫通孔と、一方接合板４の他端側４１の板を貫通するように形成された接合板側貫通孔６６と、他方接合板５の他端側５１の板を貫通するように形成された接合板側貫通孔６６とを連通させることにより、ボルト通し用貫通孔が構成される。
構造部材側貫通孔は、木質梁２０の梁端部２０ｅの側面２２Ｘ，２２Ｙにおける梁成方向（縦方向）に沿って所定の間隔を隔てて複数形成される。
また、接合板側貫通孔６６は、一方接合板４の他端側４２及び他方接合板５の他端側５２の板の縦方向（梁成方向）に沿って、構造部材側貫通孔間の所定の間隔と同じ所定間隔を隔てて複数形成される。
尚、構造部材側貫通孔は、ボルト６の径寸法に対応した径寸法の断面円形孔に形成される。
また、接合板側貫通孔６６は、一方接合板４の他端側４２及び他方接合板５の他端側５２の板の横方向（梁の延長方向）に長い長径で長孔に形成される。当該接合板側貫通孔６６の短径寸法は、ボルトの径寸法に対応した径寸法に形成される。
このように、接合板側貫通孔６６を梁の延長方向に長くなる長孔に形成したため、対応する第２の構造部材２の構造部材側貫通孔の中心と一方接合板４の他端側４２及び他方接合板５の他端側５２の接合板側貫通孔６６，６６の中心とが梁の延長方向にずれたとしても、当該構造部材側貫通孔と接合板側貫通孔６６，６６とを連通させたボルト通し用貫通孔を容易に形成できるようになるため、第２の構造部材２の梁端部２０ｅ側と一方接合板４の他端側４２及び他方接合板５の他端側５２との接合作業を容易に行えるようになる。 The structural member side through hole is configured so as to communicate with a beam through hole 26 formed to penetrate from one side 22X to the other side 22Y of the beam end 20e of the wooden beam 20, a covering portion through hole 21a formed to penetrate the second fire-resistant covering portion 21 covering one side 22X of the beam end 20e of the wooden beam 20, and a covering portion through hole 21a formed to penetrate the second fire-resistant covering portion 21 covering the other side 22Y of the beam end 20e of the wooden beam 20.
Then, a bolt passage through hole is formed by connecting the structural member side through hole with the joining plate side through hole 66 formed to penetrate the plate on the other end side 41 of one joining plate 4, and the joining plate side through hole 66 formed to penetrate the plate on the other end side 51 of the other joining plate 5.
A plurality of structural member-side through holes are formed at predetermined intervals along the beam formation direction (vertical direction) on the side surfaces 22X, 22Y of the beam end portion 20e of the wooden beam 20.
In addition, the joining plate side through holes 66 are formed in multiple positions along the vertical direction (beam direction) of the plate on the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5, at a predetermined interval that is the same as the predetermined interval between the structural member side through holes.
The through hole on the structural member side is formed to have a circular cross section and a diameter corresponding to the diameter of the bolt 6 .
The joint plate through hole 66 is formed as a long hole with a long major axis in the lateral direction (extension direction of the beam) of the other end side 42 of the one joint plate 4 and the other end side 52 of the other joint plate 5. The minor axis of the joint plate through hole 66 is formed to have a diameter dimension corresponding to the diameter dimension of the bolt.
In this way, since the joining plate side through hole 66 is formed as a long hole that is longer in the extension direction of the beam, even if the center of the corresponding structural member side through hole of the second structural member 2 and the center of the joining plate side through holes 66, 66 of the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5 are misaligned in the extension direction of the beam, it is possible to easily form a bolt passing through hole that connects the structural member side through hole and the joining plate side through holes 66, 66, so that the joining work between the beam end portion 20e side of the second structural member 2 and the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5 can be easily performed.

以上説明した構成の接合構造の施工手順の一例について説明する。
まず、木質梁２０の互いに対向する両方の梁側面２２Ｘ，２２Ｙ、木質梁２０の下面２３、及び、木質梁２０の梁端面２４，２４に、第２の耐火被覆部２１が設けられて、構造部材側貫通孔（梁貫通孔２６及び被覆部貫通孔２１ａ，２１ａ）が形成されるように作製された第２の構造部材２を用意しておく。
そして、木質梁２０の梁端面２４と対向させる金属質柱１０の一側面１２に、一方接合板４の一端側４１と、他方接合板５の一端側５１とを、第1固定手段としての溶接により固定する。この場合、一方接合板４の他端側４２の板面と他方接合板５の他端側５２の板面との間の対向間隔寸法が、第２の構造部材２の一方の側面と他方の側面との間の間隔寸法に対応した寸法になるように固定する。
次に、金属質柱１０の露出した表面に第１の耐火被覆部１１を形成する。
そして、第２の構造部材２の梁端部２０ｅ側を、一方接合板４の他端側４２の板面と他方接合板５の他端側５２の板面との間に設置して、一方接合板４の他端側４２の接合板側貫通孔６６と第２の構造部材２の構造部材側貫通孔と他方接合板５の他端側５２の接合板側貫通孔６６とを連通させた複数のボルト通し用貫通孔を形成した後、各ボルト通し用貫通孔に、それぞれ、ボルト６，６…を貫通させる。
その後、一方接合板４の他端側４２の接合板側貫通孔６６を貫通させて外方に突出させたボルト６の一端側６１にナット４５を螺着するとともに、他方接合板５の他端側５２の接合板側貫通孔６６を貫通させて外方に突出させたボルト６の他端側６２にナット５５を螺着して、当該ナット４５及びナット５５を締結することにより、一方接合板４の他端側４２が第２の構造部材２の梁端部２０ｅ側に固定されるとともに、他方接合板５の他端側５２を第２の構造部材２の梁端部２０ｅ側に固定される。
換言すれば、ナット４５は、木質梁２０の梁端部２０ｅの一方の側面２２Ｘを覆う第２の耐火被覆部２１を貫通した軸材としてのボルト６の一端側６１及び一方接合板４の他端側４２に締結された締結部材として機能する。同様に、ナット５５は、木質梁２０の梁端部２０ｅの他方の側面２２Ｙを覆う第２の耐火被覆部２１を貫通した軸材としてのボルト６の他端側６２及び他方接合板５の他端側５２に締結された締結部材として機能する。
以上により、第１の構造部材１と第２の構造部材２とが接合手段３により接合される。
そして、上階の床スラブＦを形成するための図外のコンクリート打設用の型枠を設置して、当該型枠の上、及び、木質梁２０の上端面２５の上にコンクリートを打設することにより、上階の床スラブＦを形成する。
尚、上述した施工手順の順番は、あくまでも一例であり、施工手順は上述した順番でなくとも構わない。
例えば、予め一方接合板４の他端側４２及び他方接合板５の他端側５２を第２の構造部材２の梁端部２０ｅ側に取付けておいてから、一方接合板４の一端側４１及び他方接合板５の一端側５１を、金属質柱１０の一側面１２に溶接して固定するようにしてもよい。
尚、図示は省略したが、木質梁２０の互いに対向する両方の梁側面２２Ｘ，２２Ｙに設けられた第２の耐火被覆部２１の表面に露出することになる、一方接合板４の他端側４２，他方接合板５の他端側５２、ボルト６の両端側（一端側６１，他端側６２)、ナット４５，５５の表面にも、第１の耐火被覆部１１を形成する。 An example of a construction procedure for the joint structure having the above-described configuration will be described.
First, a second structural member 2 is prepared in such a way that a second fire-resistant coating portion 21 is provided on both opposing beam side surfaces 22X, 22Y of the wooden beam 20, the underside 23 of the wooden beam 20, and the beam end surfaces 24, 24 of the wooden beam 20, so that structural member side through holes (beam through hole 26 and coating portion through holes 21a, 21a) are formed.
Then, one end side 41 of the first joining plate 4 and one end side 51 of the other joining plate 5 are fixed to one side surface 12 of the metal column 10 that faces the beam end surface 24 of the wooden beam 20 by welding as a first fixing means. In this case, they are fixed so that the opposing distance between the plate surface of the other end side 42 of the first joining plate 4 and the plate surface of the other end side 52 of the other joining plate 5 corresponds to the distance between one side surface and the other side surface of the second structural member 2.
Next, a first fire-resistant coating portion 11 is formed on the exposed surface of the metallic column 10 .
Then, the beam end 20e side of the second structural member 2 is installed between the plate surface of the other end side 42 of the one joining plate 4 and the plate surface of the other end side 52 of the other joining plate 5, and a plurality of bolt-passing through holes are formed that connect the joining plate side through hole 66 of the other end side 42 of the one joining plate 4 to the structural member side through hole of the second structural member 2 and the joining plate side through hole 66 of the other end side 52 of the other joining plate 5, and then bolts 6, 6... are passed through each of the bolt-passing through holes.
Then, a nut 45 is screwed onto one end side 61 of the bolt 6 that has passed through the joining plate side through hole 66 of the other end side 42 of one of the joining plates 4 and protrudes outward, and a nut 55 is screwed onto the other end side 62 of the bolt 6 that has passed through the joining plate side through hole 66 of the other end side 52 of the other joining plate 5 and protrudes outward.By tightening the nut 45 and the nut 55, the other end side 42 of the one joining plate 4 is fixed to the beam end side 20e of the second structural member 2, and the other end side 52 of the other joining plate 5 is fixed to the beam end side 20e of the second structural member 2.
In other words, the nut 45 functions as a fastening member fastened to one end 61 of the bolt 6 as a shaft member penetrating the second fire-resistant covering 21 covering one side 22X of the beam end 20e of the wooden beam 20 and the other end 42 of the one joint plate 4. Similarly, the nut 55 functions as a fastening member fastened to the other end 62 of the bolt 6 as a shaft member penetrating the second fire-resistant covering 21 covering the other side 22Y of the beam end 20e of the wooden beam 20 and the other end 52 of the other joint plate 5.
In this manner, the first structural member 1 and the second structural member 2 are joined by the joining means 3 .
Then, a formwork for pouring concrete (not shown) is installed to form the floor slab F of the upper floor, and concrete is poured onto the formwork and onto the upper end surfaces 25 of the wooden beams 20, thereby forming the floor slab F of the upper floor.
The above-mentioned order of the construction steps is merely an example, and the construction steps do not have to be in the order described above.
For example, the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5 may be attached to the beam end portion 20e of the second structural member 2 in advance, and then one end side 41 of one joining plate 4 and one end side 51 of the other joining plate 5 may be welded and fixed to one side surface 12 of the metal column 10.
Although not shown in the figure, the first fire-resistant coating portion 11 is also formed on the other end side 42 of the one connecting plate 4, the other end side 52 of the other connecting plate 5, both end sides (one end side 61, the other end side 62) of the bolt 6, and the surfaces of the nuts 45 and 55, which will be exposed on the surface of the second fire-resistant coating portion 21 provided on both opposing beam sides 22X and 22Y of the wooden beam 20.

実施形態１に係る接合構造によれば、一方接合板４の一端側４１及び他方接合板５の一端側５１が第１の耐火被覆部１１を介さずに金属質柱１０に接合されて、かつ、一方接合板４の他端側４２及び他方接合板５の他端側５２が第２の耐火被覆部２１を介して木質梁２０に接合された接合構造としたので、第２の荷重支持部としての木質梁２０の梁端部２０ｅの表面に、固定手段としてのボルト６の一端側６１，他端側６２及びナット４５，５５を収容するための凹部を形成する必要がなくなり、このため、第２の荷重支持部としての木質梁２０の表面に当該凹部を形成するための座繰り加工を不要とでき、加工手間、加工コストを削減できる。
即ち、第１の荷重支持部としての金属質柱１０と当該金属質柱１０の表面を覆う第１の耐火被覆部１１とを有した第１の構造部材１と、第２の荷重支持部としての木質梁２０と当該木質梁２０の表面を覆う第２の耐火被覆部２１とを有した第２の構造部材２とを接合する接合構造において、木質梁２０の加工手間、加工コストを削減できる接合構造を提供できるようになった。
また、一方接合板４の一端側４１及び他方接合板５の一端側５１と金属質柱１０との接合作業、一方接合板４の他端側４２及び他方接合板５の他端側５２と第２の構造部材２と接合作業が容易になる。 According to the joining structure of embodiment 1, one end side 41 of one joining plate 4 and one end side 51 of the other joining plate 5 are joined to the metal column 10 without the first fire-resistant coating part 11, and the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5 are joined to the wooden beam 20 via the second fire-resistant coating part 21. Therefore, it is not necessary to form recesses on the surface of the beam end part 20e of the wooden beam 20 as the second load-bearing part to accommodate the one end side 61 and the other end side 62 of the bolt 6 and the nuts 45, 55 as fixing means. As a result, it is not necessary to perform countersinking to form such recesses on the surface of the wooden beam 20 as the second load-bearing part, thereby reducing the processing effort and processing costs.
In other words, in a joining structure joining a first structural member 1 having a metal column 10 as a first load-supporting portion and a first fire-resistant coating portion 11 covering the surface of the metal column 10, and a second structural member 2 having a wooden beam 20 as a second load-supporting portion and a second fire-resistant coating portion 21 covering the surface of the wooden beam 20, it is now possible to provide a joining structure that can reduce the processing labor and costs of the wooden beam 20.
In addition, the joining operation between one end side 41 of one joining plate 4 and one end side 51 of the other joining plate 5 and the metal column 10, and the joining operation between the other end side 42 of one joining plate 4 and the other end side 52 of the other joining plate 5 and the second structural member 2 are facilitated.

実施形態２
実施形態１では、第１の荷重支持部としての金属質柱１０と第２の荷重支持部としての木質梁２０との接合構造を例示したが、例えば金属質柱１０に接合された図外の第１の荷重支持部としての金属質梁と当該金属質梁の表面を覆う第１の耐火被覆部とを有した第１の構造部材と、第２の荷重支持部としての木質梁と当該木質梁の表面を覆う第２の耐火被覆部とを有した第２の構造部材とを接合する接合構造においても、実施形態１と同様に構成できる。
この場合、一方接合板４の一端側４１と他方接合板５の一端側５１とを、例えば、第１の荷重支持部としての金属質梁を形成するＨ形鋼のウェブに溶接で固定するとともに、実施形態１と同様に、一方接合板４の他端側４２及び他方接合板５の他端側５２を第２の構造部材の梁端部側に固定すればよい。
以上説明した実施形態２に係る第１の構造部材と第２の構造部材との接合構造であっても、実施形態１と同様な効果が得られる。 EMBODIMENT 2
In the first embodiment, a joining structure between a metal column 10 as a first load-supporting portion and a wooden beam 20 as a second load-supporting portion is exemplified. However, a joining structure joining a first structural member having a metal beam as a first load-supporting portion (not shown) joined to the metal column 10 and a first fire-resistant coating portion covering the surface of the metal beam, and a second structural member having a wooden beam as a second load-supporting portion and a second fire-resistant coating portion covering the surface of the wooden beam can also be configured in the same manner as in the first embodiment.
In this case, one end side 41 of the first joining plate 4 and one end side 51 of the other joining plate 5 are fixed, for example, by welding to a web of an H-shaped steel forming a metallic beam as the first load-supporting part, and, as in embodiment 1, the other end side 42 of the first joining plate 4 and the other end side 52 of the other joining plate 5 are fixed to the beam end side of the second structural member.
The joining structure between the first structural member and the second structural member according to the second embodiment described above also provides the same effects as those of the first embodiment.

尚、上記では、一方接合板４及び他方接合板５として、Ｌ形鋼板を使用した例を示したが、一方接合板４及び他方接合板５としては、Ｌ形鋼板以外の、例えば、断面Ｔ字のＴ形鋼板、平鋼板等を使用しても良い。 In the above, an example was shown in which an L-shaped steel plate was used as the one connecting plate 4 and the other connecting plate 5, but materials other than an L-shaped steel plate, such as a T-shaped steel plate with a T-shaped cross section, or a flat steel plate, may also be used as the one connecting plate 4 and the other connecting plate 5.

また、上記では、第１固定手段として、溶接を使用した例を示したが、第１固定手段としては、一方接合板の一端側４１と金属質柱１０や金属質梁とを固定するボルト及びナット、あるいは、他方接合板の一端側５１と金属質柱１０や金属質梁とを固定するボルト及びナットを用いてもよい。 In the above, an example was given in which welding was used as the first fixing means, but the first fixing means may be a bolt and nut that fixes one end side 41 of one joining plate to the metallic column 10 or metallic beam, or a bolt and nut that fixes one end side 51 of the other joining plate to the metallic column 10 or metallic beam.

また、上記では、互いに対向する第１の荷重支持部１０と第２の耐火被覆部２１との間、例えば、図２，図３に示すように、互いに対向する金属質柱１０の一側面１２と木質梁２０の梁端面２４に設けられた第２の耐火被覆部２１との間の間隔Ｓを第１の耐火被覆部１１の厚さに対応させた間隔に設定した構成を例示したが、当該間隔Ｓを耐火被覆部１１の厚さよりも大きい間隔にして、第２の耐火被覆部２１と第１の耐火被覆部１１との間に空間を設けるようにしてもよい。
即ち、互いに対向する第１の荷重支持部と第２の耐火被覆部２１との間を離間させた構造とすればよく、この場合、互いに対向する第１の荷重支持部と第２の耐火被覆部２１との間の間隔Ｓを、耐火被覆部１１を介して離間させた構成、あるいは、互いに対向する第１の荷重支持部と第２の耐火被覆部２１との間隔Ｓを、耐火被覆部１１と空間とで形成した構成としてもよい。
このようにすれば、第１の荷重支持部と第２の荷重支持部と間の熱の伝達を、より効果的に抑制できるようになる。 In the above example, a configuration has been exemplified in which the distance S between the opposing first load-supporting portion 10 and the second fire-resistant coating portion 21, for example, between one side surface 12 of the metal column 10 and the second fire-resistant coating portion 21 provided on the beam end surface 24 of the wooden beam 20, which are opposed to each other, is set to a distance corresponding to the thickness of the first fire-resistant coating portion 11, but the distance S may be set to a distance greater than the thickness of the fire-resistant coating portion 11 to provide a space between the second fire-resistant coating portion 21 and the first fire-resistant coating portion 11.
That is, it is sufficient to have a structure in which the first load support portion and the second fire-resistant coating portion 21 which face each other are spaced apart. In this case, the space S between the first load support portion and the second fire-resistant coating portion 21 which face each other may be configured to be spaced apart via the fire-resistant coating portion 11, or the space S between the first load support portion and the second fire-resistant coating portion 21 which face each other may be formed by the fire-resistant coating portion 11 and a space.
In this way, the transfer of heat between the first load support portion and the second load support portion can be more effectively suppressed.

また、各実施形態では、第１の荷重支持部が金属質柱１０又は金属質梁であり、第２の荷重支持部が木質梁２０である場合を例にして説明したが、本発明の接合構造は、第１の荷重支持部が金属質梁であり、第２の構造部材の第２の荷重支持部が木質柱又は木質梁である場合であっても適用可能である。
この場合、例えば、木質柱又は木質梁の表面を覆う第２の耐火被覆部の表面側に一方接合板及び他方接合板の他端側を配置して、木質柱又は木質梁及びこれら接合板の他端側に形成されたボルト通し用貫通孔に貫通させたボルトの一端側及び他端側にナットを締結して一方接合板及び他方接合板の他端側を第２の構造部材に固定するとともに、一方接合板及び他方接合板の一端側を金属質梁を形成するＨ形鋼のウェブに溶接等で固定した接合構造とすればよい。 In addition, each embodiment has been described using an example in which the first load-supporting part is a metal column 10 or a metal beam and the second load-supporting part is a wooden beam 20, but the joining structure of the present invention can also be applied in cases in which the first load-supporting part is a metal beam and the second load-supporting part of the second structural member is a wooden column or a wooden beam.
In this case, for example, the other end sides of the one connecting plate and the other connecting plate are placed on the surface side of the second fire-resistant coating portion covering the surface of the wooden column or wooden beam, and nuts are fastened to one end side and the other end side of a bolt passed through a bolt-passing through hole formed on the wooden column or wooden beam and the other end side of these connecting plates to fix the other end sides of the one connecting plate and the other connecting plate to the second structural member, and the one end sides of the one connecting plate and the other connecting plate are fixed to the web of the H-shaped steel forming the metal beam by welding or the like to create a connecting structure.

尚、上記では、第１の荷重支持部及び第２の荷重支持部のうちの、一方が金属質の荷重支持部、他方が木質の荷重支持部の場合を例示したが、第１の荷重支持部及び第２の荷重支持部は、金属質や木質以外の荷重支持部であってもよい。例えば、第１の荷重支持部及び第２の荷重支持部のうちの、一方が金属質の荷重支持部、他方がコンクリートの荷重支持部であってもよい。
即ち、本発明の接合構造では、第１の荷重支持部と第２の荷重支持部とが、それぞれ、異なる材料により形成された荷重支持部であればよい。 In the above, the case where one of the first load-supporting portion and the second load-supporting portion is a metallic load-supporting portion and the other is a wooden load-supporting portion has been exemplified, but the first load-supporting portion and the second load-supporting portion may be load-supporting portions made of materials other than metal and wood. For example, one of the first load-supporting portion and the second load-supporting portion may be a metallic load-supporting portion and the other is a concrete load-supporting portion.
That is, in the joint structure of the present invention, the first load supporting portion and the second load supporting portion may be formed from different materials.

また、本発明は、柱、梁以外の構造部材の接合構造にも適用可能である。
例えば、柱と耐震壁との接合構造、柱と床との接合構造、耐震壁と床との接合構造等にも適用可能である。 Furthermore, the present invention is also applicable to joint structures of structural members other than columns and beams.
For example, the present invention can be applied to a joint structure between a pillar and an earthquake-resistant wall, a joint structure between a pillar and a floor, a joint structure between an earthquake-resistant wall and a floor, etc.

１第１の構造部材、２第２の構造部材、３接合手段、４一方接合板、
５他方接合板、６ボルト（軸材）、１０金属質柱（第１の荷重支持部）、
１１第１の耐火被覆部、２０木質梁（第２の荷重支持部）、２０ｅ梁端部、
２１第２の耐火被覆部、４５，５５ナット（締結部材）。 1 First structural member, 2 Second structural member, 3 Joining means, 4 One joining plate,
5 other joining plate, 6 bolt (shaft material), 10 metal column (first load supporting portion),
11 First fire-resistant covering portion, 20 Wooden beam (second load-bearing portion), 20e Beam end portion,
21 Second fire-resistant coating portion, 45, 55 Nut (fastening member).

Claims

A first structural member having a first load-bearing portion and a first fire-resistant covering portion provided so as to cover a surface of the first load-bearing portion;
a second structural member having a second load-bearing portion and a second fire-resistant covering portion provided so as to cover a surface of the second load-bearing portion;
a joining means for joining the first structural member and the second structural member,
The first load-supporting portion and the second load-supporting portion are load-supporting portions formed of different materials, the first load-supporting portion being a metal column or a metal beam, and the second load-supporting portion being a wood beam ;
The joining means is
A joining plate and a fixing means are provided.
The joining plate is
A one-side joint plate provided along a surface of a second fire-resistant covering portion provided so as to cover one side surface of the beam end portion of the wooden beam;
and a second joint plate provided along a surface of the second fire-resistant covering portion provided to cover one side surface of the beam end portion of the wooden beam and the other side surface opposite thereto,
The fixing means is
a first fixing means for fixing one end side of the first joining plate or one end side of the other joining plate to the first load support portion;
a second fixing means for fixing the other end side of the one joining plate and the other end side of the other joining plate to a second structural member ,
The second fixing means is
a structural member side through hole formed in the second structural member so as to penetrate the beam end and the second fire-resistant coating between the surface of the second fire-resistant coating covering one side of the beam end of the wooden beam and the surface of the second fire-resistant coating covering the other side of the beam end of the wooden beam, and a through hole for passing a shaft member formed by communicating with a joint plate side through hole formed on the other end side of one joint plate and the other end side of the other joint plate;
A shaft member provided to pass through the shaft member passing through hole;
and a fastening member fastened to the shaft material passing through the shaft material passing through hole,
by the first fixing means, one end side of the first joining plate and one end side of the other joining plate are joined to the first load-supporting portion in a state of contact with the first load-supporting portion without the first fire-resistant covering portion;
and,
The second fixing means joins the plate surface on the other end side of the one joining plate and the plate surface on the other end side of the other joining plate to the second load supporting portion in a state in which the plate surface is in contact with a surface of the second fire-resistant covering portion via the second fire-resistant covering portion ,
Furthermore, this is a joining structure for structural members, characterized in that the first fire-resistant coating portion is formed so as to cover the surfaces of the other end side of one joining plate, the other end side of the other joining plate, the shaft material, and the fastening member, which are exposed on the surface of the second fire-resistant coating portion.

2. The joining structure of structural members according to claim 1, wherein the first load-bearing portion and the second fire-resistant covering portion facing each other are separated from each other by a space.

2. The joining structure of structural members according to claim 1 , wherein the one joining plate and the other joining plate are formed from steel plates that are elongated in the vertical direction and have an L-shaped cross section along a horizontal direction perpendicular to the vertical direction.

A joining structure for structural members as described in claim 3, characterized in that a plurality of through holes for passing a shaft are formed by a plurality of joining plate side through holes provided at a predetermined interval in the vertical direction of one joining plate, a plurality of joining plate side through holes provided at a predetermined interval in the vertical direction of the other joining plate, and a plurality of structural member side through holes formed in the second structural member, and a shaft is arranged to pass through each of the plurality of shaft passing through holes .

The joining structure of structural members according to any one of claims 1 to 4, characterized in that the second fire-resistant coating portion is composed of one or more fire-resistant coating layers including gypsum board.