JP2022063760A - Fitting structure between wooden structural member and partition wall - Google Patents

Fitting structure between wooden structural member and partition wall Download PDF

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JP2022063760A
JP2022063760A JP2020172165A JP2020172165A JP2022063760A JP 2022063760 A JP2022063760 A JP 2022063760A JP 2020172165 A JP2020172165 A JP 2020172165A JP 2020172165 A JP2020172165 A JP 2020172165A JP 2022063760 A JP2022063760 A JP 2022063760A
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partition wall
burn
layer
structural member
outside
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智紀 遠藤
Tomoki Endo
武 森田
Takeshi Morita
正之 広田
Masayuki Hirota
孝之 奥山
Takayuki Okuyama
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Corp
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Abstract

To provide a fitting structure between a wooden structural member and a partition wall that ensures fire resistive performance.SOLUTION: A fitting structure 10 is at a fitting section between a wooden structural member 12 and a partition wall 14 fitted on outside thereof, the wooden structural member comprising a core material 16 made of a load-supporting laminate lumber, a second flame-stopping layer 18 provided on outside of the core material 16 and made of an inorganic material having heat absorbing and heat insulating properties, and a sheet-form first flame-stopping layer 20 fitted on outside of the second flame stopping layer 18 and demonstrating the heat insulating property by increasing in thickness when heated, and the partition wall 14 is fitted directly on an outer surface of the first flame-stopping layer 20, with a filler 38 provided in a gap between an underlayer material 32 of the partition wall 14 and the first flame-stopping layer 20, the filler disappearing or reducing in volume when heated.SELECTED DRAWING: Figure 1

Description

特許法第30条第2項適用申請有り 2020年度日本建築学会大会学術講演梗概集、日本建築学会 発行日 令和2年7月20日Application for application of Article 30, Paragraph 2 of the Patent Law is available.

本発明は、例えば耐火シートを備えた木質構造部材と間仕切り壁の取合い構造に関するものである。 The present invention relates to, for example, a connection structure between a wooden structural member provided with a refractory sheet and a partition wall.

従来、本特許出願人は、耐火性能を有する木質構造部材として、「スリム耐火ウッド(登録商標)」を開発し、柱と梁において国土交通大臣認定を受けている。この木質構造部材は、荷重支持部材である木材の周囲に耐火被覆材として強化石膏ボード15mm厚2枚と耐火シート2mm厚1枚を張り、その上に木材の化粧材を設けた構成である。 Conventionally, the applicant for this patent has developed "Slim Fireproof Wood (Registered Trademark)" as a wooden structural member with fireproof performance, and has been certified by the Minister of Land, Infrastructure, Transport and Tourism for columns and beams. This wood structural member has a structure in which two reinforced gypsum boards 15 mm thick and one fireproof sheet 2 mm thick are stretched around wood, which is a load supporting member, as a fireproof covering material, and a decorative material of wood is provided on the reinforced gypsum board.

このような構成に関し、本特許出願人は既に特許文献1を提案している。この特許文献1に記載の耐火集成材は、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層と、第1燃え止まり層の外側に設けられる仕上げ材とを備えるものである。第2燃え止まり層、第1燃え止まり層、仕上げ材がそれぞれ上記の木質構造部材の強化石膏ボード、耐火シート、化粧材に相当する。 With respect to such a configuration, the applicant for this patent has already proposed Patent Document 1. The refractory laminated lumber described in Patent Document 1 includes a core material made of laminated lumber that supports a load, a second burn-off layer made of an endothermic and heat-insulating inorganic material provided on the outside of the core material, and the like. It is provided with a sheet-shaped first non-burning layer provided on the outside of the second non-burning layer and thickened by heating to exhibit heat insulating properties, and a finishing material provided on the outside of the first non-burning layer. .. The second burn-off layer, the first burn-off layer, and the finishing material correspond to the above-mentioned reinforced gypsum board, refractory sheet, and decorative material of the wood structural member, respectively.

一方、柱や梁にはサッシや間仕切り壁などの二次部材が取り付く場合が多い。上記の木質構造部材の柱や梁に二次部材が取り付いた構造においては、所定の耐火性能を確保する必要がある。特に、二次部材との取合い部に関しては、耐火性能が低下しない仕様とすることが求められる。 On the other hand, secondary members such as sashes and partition walls are often attached to columns and beams. In the structure in which the secondary member is attached to the pillar or beam of the above-mentioned wooden structural member, it is necessary to secure a predetermined fire resistance. In particular, the connection portion with the secondary member is required to have specifications that do not deteriorate the fire resistance performance.

このような問題を解決するための従来の技術として、木質部材と壁との接合部位に強化石膏ボードを設けることで木質部材の温度上昇を抑制し、非加熱面側への火炎の侵入を防ぐようにした技術が知られている(例えば、特許文献2を参照)。 As a conventional technique for solving such a problem, a reinforced gypsum board is provided at the joint between the wood member and the wall to suppress the temperature rise of the wood member and prevent the flame from invading the non-heated surface side. Such a technique is known (see, for example, Patent Document 2).

特開2015-129431号公報Japanese Unexamined Patent Publication No. 2015-129431 特開2015-40431号公報JP-A-2015-40431

ところで、上記の木質構造部材の柱と梁に間仕切り壁が取り付いた場合、以下のような要因により、間仕切り壁の取合い部やその周囲で所定の耐火性能を担保できないおそれがある。例えば、火災加熱中に間仕切り壁内のランナー・スタッドやボードが耐火シートの発泡を阻害すると、所定の耐火性能を担保できないことになる。また、耐火シートと間仕切り壁との取合い部において、耐火シートが発泡しないことにより、非加熱面側への火炎貫通や急激な温度上昇がみられると、所定の耐火性能を担保できないことになる。このため、間仕切り壁の取合い部やその周囲で所定の耐火性能を確保することが求められていた。 By the way, when a partition wall is attached to a column and a beam of the above-mentioned wooden structural member, there is a possibility that a predetermined fire resistance cannot be guaranteed in the joint portion of the partition wall and its surroundings due to the following factors. For example, if the runner studs or boards in the partition wall inhibit the foaming of the fire-resistant sheet during fire heating, the predetermined fire-resistant performance cannot be guaranteed. Further, if the refractory sheet does not foam at the joint portion between the refractory sheet and the partition wall, and the flame penetrates to the non-heated surface side or the temperature rises sharply, the predetermined fire resistance cannot be guaranteed. For this reason, it has been required to secure a predetermined fire resistance in the joint portion of the partition wall and its surroundings.

本発明は、上記に鑑みてなされたものであって、耐火性能を確保することができる木質構造部材と間仕切り壁の取合い構造を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a connecting structure between a wooden structural member and a partition wall capable of ensuring fire resistance.

上記した課題を解決し、目的を達成するために、本発明に係る木質構造部材と間仕切り壁の取合い構造は、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に直接取り付けられており、間仕切り壁の上張り材と第1燃え止まり層との間の隙間には、加熱により消失または体積が減少する充填材が設けられていることを特徴とする。 In order to solve the above-mentioned problems and achieve the object, the connecting structure between the wood structural member and the partition wall according to the present invention is provided with a core material made of laminated wood that supports a load and heat absorption by being provided on the outside of the core material. It is provided with a second burn-stop layer made of an inorganic material having properties and heat-insulating properties, and a sheet-shaped first burn-stop layer provided outside the second burn-stop layer and thickened by heating to exhibit heat insulating properties. It is the structure of the connecting part of the partition wall attached to the outside of the wood structural member, and the partition wall is directly attached to the outer surface of the first burn-off layer, and is directly attached to the outer surface of the first burn-off layer, and is the overlay material of the partition wall and the first burn-off stop. The gap between the layers is characterized by being provided with a filler that disappears or decreases in volume due to heating.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造は、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に設けられた下地材に取り付けられており、この下地材は吸熱性および断熱性を有する無機質材料からなることを特徴とする。 Further, the connecting structure between the other wood structural member and the partition wall according to the present invention is composed of a core material made of laminated lumber that supports a load and an inorganic material provided on the outside of the core material and having heat absorption and heat insulating properties. A partition wall attached to the outside of a wood structural member provided with a second burn-stop layer and a sheet-shaped first burn-stop layer provided outside the second burn-stop layer and thickened by heating to exhibit heat insulating properties. The partition wall is attached to a base material provided on the outer surface of the first burn-off layer, and this base material is made of an inorganic material having heat absorption and heat insulating properties. It is characterized by.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造は、上述した発明において、下地材の厚さが15mm以上であることを特徴とする。 Further, the connecting structure between the other wood structural member and the partition wall according to the present invention is characterized in that the thickness of the base material is 15 mm or more in the above-mentioned invention.

本発明に係る木質構造部材と間仕切り壁の取合い構造によれば、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に直接取り付けられており、間仕切り壁の上張り材と第1燃え止まり層との間の隙間には、加熱により消失または体積が減少する充填材が設けられているので、火災加熱時に充填材が消失または体積減少することによって第1燃え止まり層が増厚するための空間が形成される。これにより、第1燃え止まり層は正常な機能を発揮することができる。したがって、間仕切り壁の取合い部の耐火性能を確保することができるという効果を奏する。 According to the connection structure between the wood structural member and the partition wall according to the present invention, a core material made of laminated wood that supports a load and a second material made of an inorganic material provided on the outside of the core material and having heat absorption and heat insulating properties. The connection of the partition wall attached to the outside of the wood structural member provided with the burn-off layer and the sheet-shaped first burn-stop layer provided outside the second burn-stop layer and thickened by heating to exhibit heat insulating properties. In the structure of the part, the partition wall is directly attached to the outer surface of the first burnout layer, and the gap between the partition wall overlay and the first burnout layer disappears due to heating. Alternatively, since a filler whose volume is reduced is provided, a space for thickening the first burn-off layer is formed by the filler disappearing or decreasing in volume during fire heating. As a result, the first burn-off layer can exhibit a normal function. Therefore, there is an effect that the fire resistance of the connecting portion of the partition wall can be ensured.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造によれば、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に設けられた下地材に取り付けられており、この下地材は吸熱性および断熱性を有する無機質材料からなるので、火災加熱時における第1燃え止まり層と間仕切り壁との取合い部から非加熱面側への火炎貫通や急激な温度上昇を抑制することができる。したがって、間仕切り壁の取合い部の耐火性能を確保することができるという効果を奏する。 Further, according to the connection structure between the other wood structural member and the partition wall according to the present invention, a core material made of laminated lumber that supports a load and an inorganic material provided on the outside of the core material and having heat absorption and heat insulating properties. It is attached to the outside of a wood structural member provided with a second burn-off layer made of, and a sheet-shaped first burn-off layer provided outside the second burn-off layer and thickened by heating to exhibit heat insulating properties. It is a structure of the connecting portion of the partition wall, and the partition wall is attached to a base material provided on the outer surface of the first burn-off layer, and the base material is made of an inorganic material having heat absorption and heat insulating properties. Therefore, it is possible to suppress flame penetration and a rapid temperature rise from the joint portion between the first burnout layer and the partition wall to the non-heated surface side during fire heating. Therefore, there is an effect that the fire resistance of the connecting portion of the partition wall can be ensured.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造によれば、下地材の厚さが15mm以上であるので、取合い部の耐火性能を向上することができるという効果を奏する。 Further, according to the connection structure between the other wood structural member and the partition wall according to the present invention, since the thickness of the base material is 15 mm or more, the fire resistance performance of the connection portion can be improved.

図1は、本発明に係る木質構造部材と間仕切り壁の取合い構造の実施の形態1を示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing Embodiment 1 of a connection structure between a wooden structural member and a partition wall according to the present invention. 図2は、本発明に係る木質構造部材と間仕切り壁の取合い構造の実施の形態2を示す概略断面図である。FIG. 2 is a schematic cross-sectional view showing the second embodiment of the connection structure between the wooden structural member and the partition wall according to the present invention. 図3は、試験体の仕様を示す一覧図である。FIG. 3 is a list showing the specifications of the test piece. 図4は、試験体の温度測定位置を示す図である。FIG. 4 is a diagram showing the temperature measurement position of the test piece. 図5は、試験体の芯材温度の時間推移を示す図である。FIG. 5 is a diagram showing the time transition of the core material temperature of the test piece.

以下に、本発明に係る木質構造部材と間仕切り壁の取合い構造の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, embodiments of the connection structure between the wooden structural member and the partition wall according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(実施の形態1)
まず、本発明の実施の形態1について説明する。
(Embodiment 1)
First, Embodiment 1 of the present invention will be described.

図1に示すように、本実施の形態に係る木質構造部材と間仕切り壁の取合い構造10は、木質構造部材12の外側に直接取り付けられる間仕切り壁14の取合い部の構造である。 As shown in FIG. 1, the connection structure 10 between the wood structure member and the partition wall according to the present embodiment is a structure of the connection portion of the partition wall 14 directly attached to the outside of the wood structure member 12.

木質構造部材12は、荷重を支持する集成材からなる芯材16と、芯材16の外側表面に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層18と、第2燃え止まり層18の外側表面に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層20と、第1燃え止まり層20の外側に設けられる仕上げ材22とを備える。芯材16、第2燃え止まり層18、第1燃え止まり層20の各間は接着剤等で接合される。本実施の形態の木質構造部材12は、上記の「スリム耐火ウッド(登録商標)」からなる柱を想定しているが、本発明はこれに限るものではない。 The wood structural member 12 has a core material 16 made of laminated wood that supports a load, a second burn-off layer 18 made of an endothermic and heat-insulating inorganic material provided on the outer surface of the core material 16, and a second. It is provided with a sheet-shaped first burn-stop layer 20 provided on the outer surface of the burn-stop layer 18 and thickened by heating to exhibit heat insulating properties, and a finishing material 22 provided on the outside of the first burn-stop layer 20. .. Each of the core material 16, the second stop-burning layer 18, and the first stop-burning layer 20 is joined with an adhesive or the like. The wood structural member 12 of the present embodiment assumes a pillar made of the above-mentioned "slim refractory wood (registered trademark)", but the present invention is not limited to this.

第2燃え止まり層18は、強化石膏ボード18Aを厚さ方向に2枚積層して構成されている。第1燃え止まり層20は、加熱により発泡する発泡性の耐火シート20Aで構成されている。強化石膏ボード1枚の厚さは15mm程度、耐火シートの厚さは2mm程度を想定しているが、本発明はこれに限るものではない。仕上げ材22は、木製の化粧材で構成されており、木製の胴縁24を介して耐火シート20Aの外側表面に取り付けられる。 The second burn-off layer 18 is formed by laminating two reinforced gypsum boards 18A in the thickness direction. The first burn-off layer 20 is composed of an effervescent refractory sheet 20A that foams by heating. It is assumed that the thickness of one reinforced gypsum board is about 15 mm and the thickness of the refractory sheet is about 2 mm, but the present invention is not limited to this. The finishing material 22 is made of a wooden decorative material and is attached to the outer surface of the refractory sheet 20A via the wooden furring strip 24.

間仕切り壁14は、ランナー26と、スタッド28と、下張り材30と、上張り材32と、断熱材34とを含んで構成される壁体であり、木質構造部材12の外側の一部に取り付けられる。間仕切り壁14の取り付け箇所には、仕上げ材22は設けられていない。本実施の形態では、間仕切り壁14から仕上げ材22の端部までの間隔を10~30mm程度あけることを想定している。 The partition wall 14 is a wall body including a runner 26, a stud 28, an underlaying material 30, an upholstery material 32, and a heat insulating material 34, and is attached to a part of the outside of the wood structural member 12. Be done. No finishing material 22 is provided at the attachment point of the partition wall 14. In the present embodiment, it is assumed that the distance from the partition wall 14 to the end of the finishing material 22 is about 10 to 30 mm.

ランナー26は、壁体の上下端において壁幅方向(図の左右方向)に配置される溝形鋼である。スタッド28は、上下のランナー26間において上下方向に配置される溝形鋼であり、壁幅方向に間隔をあけて複数設けられる。下張り材30は、強化石膏ボードで構成され、スタッド28の両外側に取り付けられる。上張り材32は、硬質石膏ボードで構成され、下張り材30の外側表面に張り付けられる。断熱材34は、グラスウールで構成され、両側の下張り材30により囲まれた空間に充填配置される。なお、強化石膏ボードの厚さは20mm程度、硬質石膏ボードの厚さは10mm程度を想定しているが、本発明はこれに限るものではない。 The runner 26 is a channel steel arranged in the wall width direction (left-right direction in the figure) at the upper and lower ends of the wall body. The studs 28 are channel steels arranged in the vertical direction between the upper and lower runners 26, and a plurality of studs 28 are provided at intervals in the wall width direction. The underlaying material 30 is composed of reinforced gypsum board and is attached to both outer sides of the stud 28. The upholstery 32 is made of hard gypsum board and is attached to the outer surface of the underlayment 30. The heat insulating material 34 is made of glass wool and is filled and arranged in a space surrounded by the underlaying materials 30 on both sides. The thickness of the reinforced gypsum board is assumed to be about 20 mm, and the thickness of the hard gypsum board is assumed to be about 10 mm, but the present invention is not limited to this.

下張り材30と耐火シート20Aとの間の隙間(取合い部)には、耐火目地材36が充填されている。上張り材32と耐火シート20Aとの間の隙間(取合い部)には、シーリング材38が充填されている。これらによって遮音性を向上することができる。また、このシーリング材38は、加熱により消失する充填材である。シーリング材38には、例えばウレタン系のシーリング材を用いてもよいし、ウレタン系以外の有機系のシーリング材を用いてもよい。また、これらを組み合わせたシーリング材でもよい。 The gap (joining portion) between the underlaying material 30 and the fireproof sheet 20A is filled with the fireproof joint material 36. The sealing material 38 is filled in the gap (connecting portion) between the overlay material 32 and the refractory sheet 20A. With these, sound insulation can be improved. Further, the sealing material 38 is a filler that disappears by heating. As the sealing material 38, for example, a urethane-based sealing material may be used, or an organic-based sealing material other than the urethane-based sealing material may be used. Further, a sealing material in which these are combined may be used.

本実施の形態によれば、火災加熱時にシーリング材38は消失してこの部分に隙間が生じるので、この部分に、耐火シート20Aが発泡するための発泡しろ(空間)が確保される。これにより、耐火シート20Aは正常な機能を発揮することができ、耐火性能を担保できる。したがって、耐火シート20Aに間仕切り壁14を直接取り付けても、間仕切り壁14の取合い部やその周囲について、柱や梁単体と同様の耐火性能を確保することができる。また、本実施の形態は、間仕切り壁を耐火シートに直接取り付ける仕様のため、間仕切り壁を耐火シートに直接取り付けない仕様に比べて施工性および施工コストに優れている。 According to the present embodiment, the sealing material 38 disappears during fire heating and a gap is formed in this portion, so that a foaming margin (space) for foaming the refractory sheet 20A is secured in this portion. As a result, the fireproof sheet 20A can exhibit a normal function and can guarantee the fireproof performance. Therefore, even if the partition wall 14 is directly attached to the fireproof sheet 20A, it is possible to secure the same fireproof performance as that of a single column or beam with respect to the connecting portion of the partition wall 14 and its surroundings. Further, since the present embodiment has a specification in which the partition wall is directly attached to the fireproof sheet, it is superior in workability and construction cost as compared with a specification in which the partition wall is not directly attached to the fireproof sheet.

(実施の形態2)
次に、本発明の実施の形態2について説明する。
(Embodiment 2)
Next, Embodiment 2 of the present invention will be described.

図2に示すように、本実施の形態2に係る木質構造部材と間仕切り壁の取合い構造100は、上記の実施の形態1の取合い構造10において、耐火シート20Aの表面に下地材40を接合し、この下地材40に間仕切り壁14を取り付けた構造である。したがって、本実施の形態2では、間仕切り壁14は下地材40を介して木質構造部材12に取り付けられる。 As shown in FIG. 2, in the connection structure 100 between the wood structural member and the partition wall according to the second embodiment, the base material 40 is joined to the surface of the refractory sheet 20A in the connection structure 10 of the first embodiment. , The structure is such that the partition wall 14 is attached to the base material 40. Therefore, in the second embodiment, the partition wall 14 is attached to the wooden structural member 12 via the base material 40.

下地材40は、吸熱性および断熱性を有する無機質材料であり、本実施の形態では矩形断面の強化石膏ボードで構成している。下地材40の厚さDは、厚いほど好ましいが、1時間の耐火性能を確保するためには例えば15mm程度以上が望ましい。下地材40は、ビスと接着剤で下張り材30に固定される。 The base material 40 is an endothermic and heat-insulating inorganic material, and in the present embodiment, it is made of a reinforced gypsum board having a rectangular cross section. The thickness D of the base material 40 is preferably as thick as possible, but is preferably about 15 mm or more in order to secure the fire resistance for 1 hour. The base material 40 is fixed to the underlaying material 30 with screws and an adhesive.

下張り材30と下地材40との間の隙間(取合い部)には、耐火目地材36が充填されている。上張り材32と下地材40との間の隙間(取合い部)には、シーリング材38が充填されている。これらによって遮音性を向上することができる。また、このシーリング材38は、加熱により消失する充填材である。シーリング材38には、例えばウレタン系のシーリング材を用いてもよいし、ウレタン系以外の有機系のシーリング材を用いてもよい。また、これらを組み合わせたシーリング材でもよい。 The gap (joining portion) between the underlaying material 30 and the base material 40 is filled with the refractory joint material 36. The sealing material 38 is filled in the gap (connecting portion) between the upholstery material 32 and the base material 40. With these, sound insulation can be improved. Further, the sealing material 38 is a filler that disappears by heating. As the sealing material 38, for example, a urethane-based sealing material may be used, or an organic-based sealing material other than the urethane-based sealing material may be used. Further, a sealing material in which these are combined may be used.

本実施の形態によれば、火災加熱中および加熱後にランナー26、スタッド28、下張り材30、上張り材32が残存するため耐火シート20Aの発泡は抑制されるが、下地材40を設けることで、火災加熱時における耐火シート20Aと間仕切り壁14との取合い部から非加熱面側への火炎貫通や急激な温度上昇を抑制することができる。したがって、間仕切り壁14の取合い部やその周囲について、柱や梁単体と同様の耐火性能を確保することができる。このため、火災加熱時に耐火シート20Aが発泡しなかったとしても、取合い部の柱や梁の芯材温度が260℃を超えて炭化するのを防ぐことが可能である。 According to the present embodiment, since the runner 26, the stud 28, the underlaying material 30, and the upholstery material 32 remain during and after heating the fire, foaming of the refractory sheet 20A is suppressed, but by providing the base material 40, the foaming is suppressed. It is possible to suppress flame penetration and a rapid temperature rise from the joint portion between the refractory sheet 20A and the partition wall 14 to the non-heated surface side during fire heating. Therefore, it is possible to secure the same fire resistance as a single column or beam for the connecting portion of the partition wall 14 and its surroundings. Therefore, even if the refractory sheet 20A does not foam during fire heating, it is possible to prevent the core material temperature of the columns and beams of the connecting portion from carbonizing above 260 ° C.

(本発明の効果の検証)
次に、本発明の効果を検証するために行った試験および結果について説明する。
(Verification of the effect of the present invention)
Next, the tests and results performed to verify the effect of the present invention will be described.

試験体として、図1および図2のような断面形状の試験体を作製した。図3に、試験体の仕様を示す。この図に示すように、試験体Aは下地材40を有しない構造、試験体Bは下地材40を有する構造である。木質構造部材12には、上記の「スリム耐火ウッド(登録商標)」を用いた。間仕切り壁14には、1時間耐火性能を有する耐火間仕切壁を用いた。間仕切り壁14の取付方法は、まずランナー26を取り付け、スタッド28を建て込んだ後、片面側に下張り材30(強化石膏ボードGB-F(V)、21mm厚)、上張り材32(硬質石膏ボードGB-R-H、9.5mm厚)の順に取り付け、その後、スタッド28の隙間に断熱材34としてグラスウール(24kg/m、50mm厚)を挿入してから、残りの片面側に下張り材と上張り材を取り付けることにより行った。なお、下張り材30と下地材40または耐火シート20Aとの取合い部には耐火目地材36を設け、上張り材32と下地材40または耐火シート20Aとの取合い部にはウレタン系のシーリング材38による隙間充填を行った。試験体Bの下地材40は、強化石膏ボード15mm厚を用い、これを耐火シート20Aの上に貼り付けた。この強化石膏ボードの取付方法は、石膏ボードビスと接着剤(酢酸ビニル樹脂系接着剤)の併用とした。 As a test body, a test body having a cross-sectional shape as shown in FIGS. 1 and 2 was prepared. FIG. 3 shows the specifications of the test piece. As shown in this figure, the test body A has a structure having no base material 40, and the test body B has a structure having a base material 40. The above-mentioned "slim refractory wood (registered trademark)" was used for the wood structural member 12. For the partition wall 14, a fire-resistant partition wall having a one-hour fire resistance was used. As for the method of attaching the partition wall 14, the runner 26 is first attached, the stud 28 is built, and then the underlaying material 30 (reinforced gypsum board GB-F (V), 21 mm thick) and the upholstery material 32 (hard gypsum) are installed on one side. Board GB-RH, 9.5 mm thick) is attached in this order, and then glass wool (24 kg / m 3 , 50 mm thick) is inserted as a heat insulating material 34 in the gap between the studs 28, and then the underlaying material is placed on the remaining one side. It was done by attaching the upholstery. A fire-resistant joint material 36 is provided at the joint between the underlaying material 30 and the base material 40 or the fire-resistant sheet 20A, and a urethane-based sealing material 38 is provided at the joint between the upholstery material 32 and the base material 40 or the fire-resistant sheet 20A. The gap was filled with. As the base material 40 of the test body B, a reinforced gypsum board having a thickness of 15 mm was used, and this was attached onto the refractory sheet 20A. The method of attaching this reinforced gypsum board was a combination of gypsum board screws and an adhesive (vinyl acetate resin-based adhesive).

このように製作した試験体A、Bに対する耐火実験を行い、試験体内部の温度を測定した。これにより、間仕切り壁が取り合う部分に関して1時間の耐火性能を調べた。図4に、試験体Aにおける温度測定位置を示す。試験体Bにおける温度測定位置も同様に設定した。図5に、試験体Aにおける各測定位置の芯材温度の時間推移を示す。この図に示すように、試験体Aの場合、取合い部の芯材温度は最大100.1℃となり、芯材が炭化する温度まで至らなかった。また、取合い部の裏面温度は最大67.2℃、平均62.7℃となり、許容温度(最大温度208度、平均温度168℃)以下となった。また、実験後に目視観察したところ、試験体A、Bともに間仕切り壁の取合い部廻りの芯材に変色・炭化は見られなかった。また、試験体A、Bともに取合い部での火炎貫通や100℃を超える温度上昇は見られなかった。 A fire resistance test was conducted on the test bodies A and B manufactured in this way, and the temperature inside the test body was measured. As a result, the fire resistance for 1 hour was investigated for the part where the partition walls meet. FIG. 4 shows the temperature measurement position in the test piece A. The temperature measurement position in the test body B was also set in the same manner. FIG. 5 shows the time transition of the core material temperature at each measurement position in the test piece A. As shown in this figure, in the case of the test piece A, the core material temperature of the connecting portion was 100.1 ° C. at the maximum, and the temperature did not reach the temperature at which the core material was carbonized. Further, the back surface temperature of the connecting portion was 67.2 ° C. at the maximum and 62.7 ° C. on the average, which was below the permissible temperature (maximum temperature 208 ° C., average temperature 168 ° C.). Further, when visually observed after the experiment, no discoloration or carbonization was observed in the core material around the connecting portion of the partition wall in both the test pieces A and B. In addition, neither flame penetration nor temperature rise exceeding 100 ° C. was observed in the joints of the test bodies A and B.

これらの実験結果より、試験体Aのように強化石膏ボード等の下地材を設けず、耐火シートに直接間仕切り壁を取り付けた場合には、上張り材と耐火シートとの隙間に有機系のシーリング材を設けることで、火災加熱時にシーリング材が消失して耐火シートの発泡しろができるため、耐火性能を担保できる。したがって、間仕切り壁の取合い部やその周囲について、柱や梁単体と同様の耐火性能を確保することができる。 From these experimental results, when the partition wall is directly attached to the refractory sheet without providing a base material such as reinforced gypsum board as in the test piece A, the organic sealing is provided in the gap between the upholstery material and the refractory sheet. By providing the material, the sealing material disappears when the fire is heated, and the refractory sheet can be foamed, so that the fire resistance can be ensured. Therefore, it is possible to secure the same fire resistance as that of a single column or beam for the connecting portion of the partition wall and its surroundings.

また、試験体Bでは、火災加熱中および加熱後にランナー・スタッドやボードが残存するため耐火シートの発泡は抑制されるが、強化石膏ボード15mm厚の下地材を設けることで、耐火シートと間仕切り壁との取合い部から非加熱面側への火炎貫通や急激な温度上昇を抑制することができる。したがって、間仕切り壁の取合い部やその周囲についても、柱や梁単体と同様の耐火性能を確保することができる。 Further, in the test piece B, the foaming of the refractory sheet is suppressed because the runner studs and the board remain during and after the fire is heated. However, by providing the base material of the reinforced gypsum board with a thickness of 15 mm, the refractory sheet and the partition wall are provided. It is possible to suppress flame penetration and sudden temperature rise from the contact part with the non-heated surface side. Therefore, it is possible to secure the same fire resistance as that of a single column or beam for the connecting portion of the partition wall and its surroundings.

以上説明したように、本発明に係る木質構造部材と間仕切り壁の取合い構造によれば、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に直接取り付けられており、間仕切り壁の上張り材と第1燃え止まり層との間の隙間には、加熱により消失または体積が減少する充填材が設けられているので、火災加熱時に充填材が消失または体積減少することによって第1燃え止まり層が増厚するための空間が形成される。これにより、第1燃え止まり層は正常な機能を発揮することができる。したがって、間仕切り壁の取合い部の耐火性能を確保することができる。 As described above, according to the connection structure between the wood structural member and the partition wall according to the present invention, a core material made of laminated wood that supports a load and a core material provided on the outside of the core material have heat absorption and heat insulating properties. On the outside of a wood structural member provided with a second burn-stop layer made of an inorganic material and a sheet-shaped first burn-stop layer provided outside the second burn-stop layer and thickened by heating to exhibit heat insulating properties. It is the structure of the joint part of the partition wall to be attached, and the partition wall is directly attached to the outer surface of the first burn-off layer, and the gap between the overlay material of the partition wall and the first burn-off layer. Is provided with a filler that disappears or decreases in volume due to heating, so that a space for thickening the first burn-off layer is formed by the filler disappearing or decreasing in volume during fire heating. As a result, the first burn-off layer can exhibit a normal function. Therefore, the fire resistance of the connecting portion of the partition wall can be ensured.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造によれば、荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、間仕切り壁は、第1燃え止まり層の外側の表面に設けられた下地材に取り付けられており、この下地材は吸熱性および断熱性を有する無機質材料からなるので、火災加熱時における第1燃え止まり層と間仕切り壁との取合い部から非加熱面側への火炎貫通や急激な温度上昇を抑制することができる。したがって、間仕切り壁の取合い部の耐火性能を確保することができる。 Further, according to the connection structure between the other wood structural member and the partition wall according to the present invention, a core material made of laminated lumber that supports a load and an inorganic material provided on the outside of the core material and having heat absorption and heat insulating properties. It is attached to the outside of a wood structural member provided with a second burn-off layer made of, and a sheet-shaped first burn-off layer provided outside the second burn-off layer and thickened by heating to exhibit heat insulating properties. It is a structure of the connecting portion of the partition wall, and the partition wall is attached to a base material provided on the outer surface of the first burn-off layer, and the base material is made of an inorganic material having heat absorption and heat insulating properties. Therefore, it is possible to suppress flame penetration and a rapid temperature rise from the joint portion between the first burnout layer and the partition wall to the non-heated surface side during fire heating. Therefore, the fire resistance of the connecting portion of the partition wall can be ensured.

また、本発明に係る他の木質構造部材と間仕切り壁の取合い構造によれば、下地材の厚さが15mm以上であるので、取合い部の耐火性能を向上することができる。 Further, according to the connection structure between the partition wall and the other wood structural member according to the present invention, the thickness of the base material is 15 mm or more, so that the fire resistance of the connection portion can be improved.

以上のように、本発明に係る木質構造部材と間仕切り壁の取合い構造は、耐火性の木質構造部材の外側に間仕切り壁を取り付ける場合に有用であり、特に、間仕切り壁の取合い部の耐火性能を確保するのに適している。 As described above, the connection structure between the wood structural member and the partition wall according to the present invention is useful when the partition wall is attached to the outside of the fire-resistant wood structural member, and in particular, the fire resistance performance of the connection portion of the partition wall is improved. Suitable for securing.

10,100 木質構造部材と間仕切り壁の取合い構造
12 木質構造部材
14 間仕切り壁
16 芯材
18 第2燃え止まり層
18A 強化石膏ボード
20 第1燃え止まり層
20A 耐火シート
22 仕上げ材
24 胴縁
26 ランナー
28 スタッド
30 下張り材
32 上張り材
34 断熱材
36 耐火目地材
38 シーリング材(充填材)
40 下地材
D 厚さ
10,100 Wood structural member and partition wall connection structure 12 Wood structural member 14 Partition wall 16 Core material 18 2nd non-burning layer 18A Reinforced gypsum board 20 1st non-burning layer 20A Fireproof sheet 22 Finishing material 24 Furnace 26 Runner 28 Stud 30 Underlaying material 32 Overlaying material 34 Insulation material 36 Fireproof joint material 38 Sealing material (filling material)
40 Base material D Thickness

Claims (3)

荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、
間仕切り壁は、第1燃え止まり層の外側の表面に直接取り付けられており、間仕切り壁の上張り材と第1燃え止まり層との間の隙間には、加熱により消失または体積が減少する充填材が設けられていることを特徴とする木質構造部材と間仕切り壁の取合い構造。
A core material made of laminated lumber that supports a load, a second burn-off layer made of an endothermic and heat-insulating inorganic material provided on the outside of the core material, and a second burn-off layer provided on the outside of the second burn-off layer for heating. It is the structure of the connecting portion of the partition wall attached to the outside of the wood structural member provided with the sheet-like first burn-off layer that is thickened and exhibits heat insulating properties.
The partition wall is attached directly to the outer surface of the first stop layer, and the gap between the partition wall overlay and the first stop layer is filled with a filler that disappears or loses volume due to heating. A structure in which a wooden structural member and a partition wall are connected to each other, which is characterized by being provided with.
荷重を支持する集成材からなる芯材と、芯材の外側に設けられ、吸熱性および断熱性を有する無機質材料からなる第2燃え止まり層と、第2燃え止まり層の外側に設けられ、加熱により増厚して断熱性を発現するシート状の第1燃え止まり層とを備える木質構造部材の外側に取り付けられる間仕切り壁の取合い部の構造であって、
間仕切り壁は、第1燃え止まり層の外側の表面に設けられた下地材に取り付けられており、この下地材は吸熱性および断熱性を有する無機質材料からなることを特徴とする木質構造部材と間仕切り壁の取合い構造。
A core material made of laminated lumber that supports a load, a second burn-off layer made of an endothermic and heat-insulating inorganic material provided on the outside of the core material, and a second burn-off layer provided on the outside of the second burn-off layer for heating. It is the structure of the connecting portion of the partition wall attached to the outside of the wood structural member provided with the sheet-like first burn-off layer that is thickened and exhibits heat insulating properties.
The partition wall is attached to a base material provided on the outer surface of the first burn-off layer, and the base material is a wood structural member and a partition characterized by being made of an endothermic and heat-insulating inorganic material. Wall connection structure.
下地材の厚さが15mm以上であることを特徴とする請求項2に記載の木質構造部材と間仕切り壁の取合い構造。 The connection structure between the wood structural member and the partition wall according to claim 2, wherein the thickness of the base material is 15 mm or more.
JP2020172165A 2020-10-12 2020-10-12 Fitting structure between wooden structural member and partition wall Pending JP2022063760A (en)

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