JP2021095809A - Fire resistant structure - Google Patents

Fire resistant structure Download PDF

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JP2021095809A
JP2021095809A JP2019229004A JP2019229004A JP2021095809A JP 2021095809 A JP2021095809 A JP 2021095809A JP 2019229004 A JP2019229004 A JP 2019229004A JP 2019229004 A JP2019229004 A JP 2019229004A JP 2021095809 A JP2021095809 A JP 2021095809A
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heat
fireproof
vertical
foamable
sheet
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JP7431572B2 (en
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堤 靖浩
Yasuhiro Tsutsumi
靖浩 堤
淳次 常俊
Junji Tsunetoshi
淳次 常俊
剣一 野田
Kenichi Noda
剣一 野田
渡邉 宏
Hiroshi Watanabe
宏 渡邉
薫 坂東
Kaoru Bando
薫 坂東
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KMEW Co Ltd
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KMEW Co Ltd
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Abstract

To provide fire resistant structure 1 that can improve fire resistance performance.SOLUTION: Supporting materials 50, fire resistant boards 35, thermally foamable sheets 20, foaming spaces 88 and decorative materials 10 are successively positioned from an indoor side toward an outdoor side. Assuming the direction from the indoor side toward the outdoor side as a front direction, the fire resistant boards 35 adjacent to a horizontal direction are fixed at the outdoor sides of the supporting materials 50 by abutting vertical sides 352 to each other. The fire resistant boards 35 adjacent to a vertical direction form transverse side abutted parts 31 by abutting lateral sides 351 to each other. Fire resistance enhancement means 21 is provided at the transverse side abutted parts 31.SELECTED DRAWING: Figure 1

Description

本発明は、耐火構造に関する。詳しくは、支持材、耐火ボード、熱発泡性シートなどを備える耐火構造に関する。 The present invention relates to a fireproof structure. More specifically, the present invention relates to a fireproof structure including a support material, a fireproof board, a heat foamable sheet, and the like.

特許文献1には、耐火壁構造が開示されている。この耐火壁構造は、木製の間柱の片側に、珪酸カルシウム板である板材を釘で固定した後、その板材に発泡性耐火シートをタッカーで固定し、更に、木製の胴縁を間柱に釘で固定して、その上から窯業系サイディングの板材を胴縁に釘で固定して形成されている。 Patent Document 1 discloses a fireproof wall structure. In this fireproof wall structure, a plate material that is a calcium silicate plate is fixed to one side of a wooden pillar with nails, then a foamable fireproof sheet is fixed to the plate material with a tacker, and the wooden furring strip is nailed to the pillar. It is fixed and formed by fixing a ceramic siding board to the furring strip with nails from above.

特開2011−94350号公報Japanese Unexamined Patent Publication No. 2011-94350

しかし、上記のような耐火壁構造では、隣り合う珪酸カルシウム板の板材の接合部分(突付け部分)を通じて、火炎や熱が屋外側から屋内側に向かって侵入しやすく、耐火性が損なわれることがあった。 However, in the above-mentioned refractory wall structure, flames and heat easily invade from the outdoor side to the indoor side through the joint portion (butting portion) of the adjacent calcium silicate plates, and the fire resistance is impaired. was there.

本発明は、上記事由に鑑みてなされており、耐火性能を向上させることができる耐火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 reasons, and an object of the present invention is to provide a fireproof structure capable of improving fireproof performance.

本発明の一態様に係る耐火構造は、室内側から室外側に向かって、支持材、耐火ボード、熱発泡性シート、発泡空間及び化粧材を順次配置している。左右方向に隣り合う前記耐火ボードの縦辺同士を突付けて前記支持材の前記室外側に固定する。上下方向に隣り合う前記耐火ボードの横辺同士を突付けて横辺突付け部を形成する。前記横辺突付け部に耐火性強化手段を設ける。 In the fireproof structure according to one aspect of the present invention, a support material, a fireproof board, a heat-foamable sheet, a foam space, and a decorative material are sequentially arranged from the indoor side to the outdoor side. The vertical sides of the fireproof boards adjacent to each other in the left-right direction are abutted against each other and fixed to the outdoor side of the support material. The lateral sides of the fireproof boards adjacent to each other in the vertical direction are abutted against each other to form a lateral abutting portion. A fire resistance strengthening means is provided at the side abutting portion.

本発明によれば、耐火性能を向上させることができる、という利点がある。 According to the present invention, there is an advantage that the fire resistance can be improved.

図1は、本実施形態に係る耐火構造を示す斜視図である。FIG. 1 is a perspective view showing a fireproof structure according to the present embodiment. 図2は、本実施形態に係る耐火構造を示す断面図である。FIG. 2 is a cross-sectional view showing a fireproof structure according to the present embodiment. 図3A〜Cは、本実施形態に係る耐火構造の一部を示す断面図である。3A to 3C are cross-sectional views showing a part of the fireproof structure according to the present embodiment. 図4は、本実施形態に係る耐火構造の施工工程を示す斜視図である。FIG. 4 is a perspective view showing a construction process of the fireproof structure according to the present embodiment. 図5は、本実施形態に係る耐火構造の施工工程を示す斜視図である。FIG. 5 is a perspective view showing a construction process of the fireproof structure according to the present embodiment. 図6は、本実施形態に係る耐火構造の施工工程を示す斜視図である。FIG. 6 is a perspective view showing a construction process of the fireproof structure according to the present embodiment. 図7Aは、本実施形態に係る耐火構造で使用する耐火ボード及び熱発泡性シートの一例を示す斜視図である。図7Bは、本実施形態に係る耐火構造で使用する耐火ボード及び熱発泡性シートの施工状態を示す斜視図である。FIG. 7A is a perspective view showing an example of a refractory board and a heat-foamable sheet used in the refractory structure according to the present embodiment. FIG. 7B is a perspective view showing a construction state of a refractory board and a heat-foamable sheet used in the refractory structure according to the present embodiment.

(実施形態1)
(1)概要
本実施形態に係る耐火構造1は、室内側から室外側に向かって、支持材50、耐火ボード35、熱発泡性シート20、発泡空間88及び化粧材10を順次配置している。室内側から室外側に向かう方向を前方向としたとき、左右方向に隣り合う耐火ボード35は、縦辺352同士を突付けて支持材50の室外側に固定している。上下方向に隣り合う耐火ボード35は、横辺351同士を突付けて横辺突付け部31を形成している。横辺突付け部31に耐火性強化手段21を設ける。
(Embodiment 1)
(1) Outline In the fireproof structure 1 according to the present embodiment, a support material 50, a fireproof board 35, a heat foamable sheet 20, a foaming space 88, and a decorative material 10 are sequentially arranged from the indoor side to the outdoor side. .. When the direction from the indoor side to the outdoor side is the front direction, the fireproof boards 35 adjacent to each other in the left-right direction abut the vertical sides 352 and are fixed to the outdoor side of the support member 50. The fireproof boards 35 adjacent to each other in the vertical direction form the side abutting portion 31 by abutting the side sides 351 against each other. The side abutting portion 31 is provided with the fire resistance strengthening means 21.

本実施形態に係る耐火構造1によれば、耐火性強化手段21により横辺突付け部31に火炎や熱が侵入しにくくなり、耐火性能を向上させることができる。 According to the fire-resistant structure 1 according to the present embodiment, the fire-resistant strengthening means 21 makes it difficult for flames and heat to enter the side-side abutting portion 31, and the fire-resistant performance can be improved.

なお、本実施形態では、室内側から室外側に向かう方向を前方向とし、室外側から室内側に向かう方向を後方向とする。また前後方向と垂直な重力方向を下方向とし、前後方向と垂直な重力方向と反対方向を上方向とする。また前後方向と上下方向に垂直な一方向を左方向とし、前後方向と上下方向に垂直な他の一方向を右方向とする。左右方向は水平方向又は横方向と同じである。 In the present embodiment, the direction from the indoor side to the outdoor side is the front direction, and the direction from the outdoor side to the indoor side is the rear direction. Further, the direction of gravity perpendicular to the front-rear direction is the downward direction, and the direction opposite to the direction of gravity perpendicular to the front-rear direction is the upward direction. Further, one direction perpendicular to the front-back direction and the up-down direction is defined as the left direction, and the other direction perpendicular to the front-back direction and the up-down direction is defined as the right direction. The left-right direction is the same as the horizontal direction or the horizontal direction.

(2)詳細
(2.1)化粧材10
化粧材10は耐火構造1の外装材であって、化粧材10によって耐火構造1が化粧される。耐火構造1が外壁構造の場合、化粧材10は外壁材であって、例えば、窯業系サイディングを含む。窯業系サイディングは、セメントを含む水硬性材料の硬化物である。化粧材10は、略平板状に形成されるが、その表面に凹凸模様や塗膜を備えて意匠性を有している。化粧材10の厚みは、例えば、10mm以上30mm以下に形成されるが、これに限定されるものではない。化粧材10の形状も任意であるが、例えば、正面視(前方から見た場合)で矩形板状に形成される。化粧材10は実を有している。化粧材10の上端部には実凹部101が設けられている。化粧材10の下端部には実凸部102が設けられている。上下に隣接して施工される化粧材10は実凹部101と実凸部102とが嵌合することにより接続される。なお、化粧材10としては、金属板を成形して得られる金属系サイディング材であってもよい。
(2) Details (2.1) Cosmetic material 10
The decorative material 10 is an exterior material of the fireproof structure 1, and the fireproof structure 1 is made up by the decorative material 10. When the fireproof structure 1 has an outer wall structure, the decorative material 10 is an outer wall material, and includes, for example, ceramic siding. Ceramic siding is a cured product of a hydraulic material containing cement. The decorative material 10 is formed in a substantially flat plate shape, but has an uneven pattern or a coating film on the surface thereof and has a design property. The thickness of the decorative material 10 is formed to be, for example, 10 mm or more and 30 mm or less, but is not limited thereto. The shape of the decorative material 10 is also arbitrary, but for example, it is formed in the shape of a rectangular plate when viewed from the front (when viewed from the front). The decorative material 10 has fruits. An actual recess 101 is provided at the upper end of the decorative material 10. A real convex portion 102 is provided at the lower end portion of the decorative material 10. The decorative material 10 to be installed adjacent to the top and bottom is connected by fitting the actual concave portion 101 and the actual convex portion 102. The decorative material 10 may be a metal-based siding material obtained by molding a metal plate.

(2.2)熱発泡性シート20
熱発泡性シート20は耐火構造1の耐火性を向上させる。熱発泡性シート20は、火災が発生していないときには薄いシートであるが、火災が発生したときにはその熱で発泡して、火災前の初期状態よりも体積を増加させる。ここで、耐火性とは、熱が前後方向に伝わるのを抑制することを意味する。熱発泡性シート20は熱発泡により体積が増加することにより、耐火層を形成する。熱発泡性シート20は1枚又は複数を組み合わせて使用することができる。熱発泡性シート20は、例えば、正面視で矩形状に形成されている。また熱発泡性シート20は、ロール状に巻かれた長尺シートに形成されていてもよい。
(2.2) Heat-foamable sheet 20
The heat-foamable sheet 20 improves the fire resistance of the fire-resistant structure 1. The heat-foamable sheet 20 is a thin sheet when a fire does not occur, but when a fire occurs, the heat-foamable sheet 20 foams due to the heat to increase the volume from the initial state before the fire. Here, fire resistance means suppressing heat transfer in the front-rear direction. The heat-foamable sheet 20 forms a refractory layer by increasing its volume due to heat foaming. The heat-foamable sheet 20 can be used alone or in combination of two or more. The heat-foamable sheet 20 is formed, for example, in a rectangular shape when viewed from the front. Further, the heat-foamable sheet 20 may be formed on a long sheet wound in a roll shape.

熱発泡性シート20は、例えば、合成樹脂、多価アルコール、及び難燃性発泡剤などを含有するものが好ましい。 The heat-foamable sheet 20 preferably contains, for example, a synthetic resin, a polyhydric alcohol, a flame-retardant foaming agent, or the like.

合成樹脂としては、例えば、メラミン樹脂、アクリル樹脂、アルキッド樹脂、塩化ビニル樹脂、酢酸ビニル樹脂、ウレタン樹脂、エポキシ樹脂、シリコーン樹脂、ポリエステル樹脂、ポリオレフィン/酢ビ樹脂、酢酸ビニル/バーサチック酸ビニルエステル共重合樹脂、酢酸ビニル/ポリオレフィン樹脂、酢酸ビニル/バーサチック酸/アクリル樹脂、酢酸ビニル/アクリル共重合樹脂、アクリル/スチレン共重合樹脂、ポリブタジエン樹脂等を挙げることができる。なお、ポリオレフィンとしてはポリエチレン等が挙げられる。 Examples of the synthetic resin include melamine resin, acrylic resin, alkyd resin, vinyl chloride resin, vinyl acetate resin, urethane resin, epoxy resin, silicone resin, polyester resin, polyolefin / vinyl acetate resin, and vinyl acetate / vinyl acetate resin. Examples thereof include a polymer resin, a vinyl acetate / polyolefin resin, a vinyl acetate / versatic acid / acrylic resin, a vinyl acetate / acrylic copolymer resin, an acrylic / styrene copolymer resin, and a polybutadiene resin. Examples of the polyolefin include polyethylene and the like.

多価アルコールとしては、ペンタエリスリトール、ジペンタエリスリトール、トリペンタエリスリトール、ポリペンタエリスリトール等が例示される。 Examples of the polyhydric alcohol include pentaerythritol, dipentaerythritol, tripentaerythritol, and polypentaerythritol.

難燃性発泡剤としては、リン酸アンモニウム、ポリリン酸アンモニウム、リン酸メラミン、ポリリン酸メラミン、ポリリン酸アルミニウム、ポリリン酸マグネシウムリン酸塩等のリン酸塩が好適に用いられるが、スルファミン酸塩(スルファミンアンモニウム等)、ホウ酸塩(ホウ酸アンモニウム等)等を例示することができる。 As the flame-retardant effervescent agent, phosphates such as ammonium phosphate, ammonium polyphosphate, melamine phosphate, melamine polyphosphate, aluminum polyphosphate, magnesium polyphosphate and the like are preferably used, but sulfamate (sulfamic acid) ( (Sulfamine ammonium, etc.), borate (ammonium borate, etc.) and the like can be exemplified.

熱発泡性シート20における合成樹脂、多価アルコール、難燃性発泡剤の含有比率は、合成樹脂100質量部に対して、多価アルコールが10質量部以上50質量部以下、難燃性発泡剤が50質量部以上200質量部以下であることが好ましい。熱発泡性シート20の厚みは、0.1mm以上5mm以下であることが好ましくは、0.3mm以上3mm以下であることがより好ましく、さらに0.4mm以上1mm以下が好ましい。 The content ratio of the synthetic resin, polyhydric alcohol, and flame-retardant foaming agent in the heat-foamable sheet 20 is 10 parts by mass or more and 50 parts by mass or less of the polyhydric alcohol with respect to 100 parts by mass of the synthetic resin, and the flame-retardant foaming agent. Is preferably 50 parts by mass or more and 200 parts by mass or less. The thickness of the heat-foamable sheet 20 is preferably 0.1 mm or more and 5 mm or less, more preferably 0.3 mm or more and 3 mm or less, and further preferably 0.4 mm or more and 1 mm or less.

発泡後の熱発泡性シート20の遮熱性を高めるために、熱発泡性シート20は発泡前の体積に比べて発泡後の体積が10〜30倍の発泡倍率であることが好ましい。例えば、化粧材10と下地30の間に形成される15mmの通気層に、厚み0.6mmのシート状の熱発泡性シート20を用いることによって、発泡倍率が25倍となり、比較的安価に耐火性を高められる。また耐火性能を高める部位には、例えば、1.2mmのシート状の熱発泡性シート20を用いて発泡倍率12.5倍として使用すると更に耐火性が高まる。 In order to enhance the heat-shielding property of the heat-foamable sheet 20 after foaming, it is preferable that the volume of the heat-foamable sheet 20 after foaming has a foaming ratio of 10 to 30 times that of the volume before foaming. For example, by using a sheet-like heat-foamable sheet 20 having a thickness of 0.6 mm for a 15 mm air-permeable layer formed between the decorative material 10 and the base 30, the foaming ratio becomes 25 times, and fire resistance is relatively inexpensive. You can improve your sex. Further, for the portion where the fire resistance is enhanced, for example, when a 1.2 mm sheet-shaped heat-foamable sheet 20 is used and the foaming ratio is 12.5 times, the fire resistance is further enhanced.

(2.3)耐火ボード35
耐火ボード35は支持材50と化粧材10との間に配置されて下地30を形成する。耐火ボード35は不燃性を有し、また平板状で、熱発泡性シート20よりも硬質に形成される。下地30は1つ又は複数の耐火ボード35で形成される。耐火ボード35としては、例えば、石膏ボード及び珪酸カルシウム板などが使用される。
(2.3) Fireproof board 35
The refractory board 35 is arranged between the support material 50 and the decorative material 10 to form the base 30. The refractory board 35 is nonflammable, has a flat plate shape, and is formed harder than the heat-foamable sheet 20. The base 30 is formed of one or more refractory boards 35. As the refractory board 35, for example, a gypsum board, a calcium silicate board, or the like is used.

耐火ボード35の厚みは、例えば、5mm以上30mm以下にすることができ、好ましくは9mm以上21mm以下にすることができるが、これに限定されない。耐火ボード35は、建築基準法第68条の26第1項の規定に基づき、同法第2条第九号及び同法施行令第108条の2(不燃材料)の規定に適合するものであることについて、国土交通大臣の認定を受けているものが好ましい。不燃性を有する耐火ボード35を含む下地30も耐火性を有する。 The thickness of the refractory board 35 can be, for example, 5 mm or more and 30 mm or less, preferably 9 mm or more and 21 mm or less, but is not limited thereto. The fireproof board 35 conforms to the provisions of Article 68-26, Paragraph 1 of the Building Standards Act, and Article 2-9 of the Act and Article 108-2 (non-combustible material) of the Enforcement Ordinance of the Act. It is preferable that the product is certified by the Minister of Land, Infrastructure, Transport and Tourism. The base 30 including the nonflammable refractory board 35 is also refractory.

耐火ボード35は、正面視で矩形状に形成される。すなわち、耐火ボード35は、正面視において、一対の縦辺352と、一対の横辺351とを有する四角形に形成されている。 The refractory board 35 is formed in a rectangular shape when viewed from the front. That is, the fireproof board 35 is formed in a quadrangle having a pair of vertical sides 352 and a pair of horizontal sides 351 when viewed from the front.

(2.4)支持材50
支持材50は、室外側に耐火ボード35が取り付けられて、これらを支持する。したがって、支持材50の室外側に下地30が形成される。支持材50は上下方向に長い部材であって、例えば柱及び間柱などとして形成される。支持材50は金属製であって、例えば、C形鋼(リップ付き溝形鋼)を使用することができる。この他に、支持材50としては、各種の断面形状の形鋼が使用でき、例えば、角型鋼管、溝形鋼、H形鋼、ハット形鋼などが挙げられる。
(2.4) Support material 50
A fireproof board 35 is attached to the outdoor side of the support member 50 to support them. Therefore, the base 30 is formed on the outdoor side of the support member 50. The support member 50 is a member that is long in the vertical direction and is formed as, for example, a pillar or a stud. The support material 50 is made of metal, and for example, C-shaped steel (grooved steel with a lip) can be used. In addition, as the support member 50, shaped steels having various cross-sectional shapes can be used, and examples thereof include square steel pipes, channel steels, H-shaped steels, and hat-shaped steels.

(2.5)耐火構造1の全体構成
本実施形態に係る耐火構造1は、室内側から室外側に向かって、支持材50、耐火ボード35、熱発泡性シート20、発泡空間88及び化粧材10を順次配置している。すなわち、耐火構造1は、前後方向において、支持材50、耐火ボード35、熱発泡性シート20、発泡空間88及び化粧材10が順次並んでいる。化粧材10は、発泡空間88を介して熱発泡性シート20の室外側に配置されている。
(2.5) Overall Configuration of Fire-Resistant Structure 1 The fire-resistant structure 1 according to the present embodiment has a support material 50, a fire-resistant board 35, a heat-foamable sheet 20, a foam space 88, and a decorative material from the indoor side to the outdoor side. 10 are arranged sequentially. That is, in the fireproof structure 1, the support material 50, the fireproof board 35, the heat-foamable sheet 20, the foaming space 88, and the decorative material 10 are sequentially arranged in the front-rear direction. The decorative material 10 is arranged on the outdoor side of the heat-foamable sheet 20 via the foaming space 88.

本実施形態に係る耐火構造1は、支持材50の室内側に耐火ボードが設けられていない。この場合、耐火構造1を簡素化することができて施工がしやすくなる。また耐火構造1の室内側の構成やデザインを自由に設計することができる。 In the fireproof structure 1 according to the present embodiment, the fireproof board is not provided on the indoor side of the support member 50. In this case, the fireproof structure 1 can be simplified and the construction becomes easier. Further, the structure and design of the indoor side of the fireproof structure 1 can be freely designed.

本実施形態に係る耐火構造1である外壁構造は以下のように構成される。 The outer wall structure which is the fireproof structure 1 according to the present embodiment is configured as follows.

図4に示すように、複数の支持材50は、基礎63の上側に土台64を介して設けられている。複数の支持材50は一つずつ所定の間隔を介して左右方向に並べられている。また二つ以上の支持材50を組み合わせて配置してもよい。 As shown in FIG. 4, the plurality of support members 50 are provided on the upper side of the foundation 63 via the base 64. The plurality of support members 50 are arranged one by one in the left-right direction with a predetermined interval. Further, two or more support members 50 may be arranged in combination.

複数の支持材50の室外側には、複数の耐火ボード35が取り付けられる。複数の耐火ボード35は上下方向及び左右方向に並べて配置されている。上下方向及び左右方向に並ぶ複数の耐火ボード35により下地30が形成される。 A plurality of refractory boards 35 are attached to the outdoor side of the plurality of support members 50. The plurality of refractory boards 35 are arranged side by side in the vertical direction and the horizontal direction. The base 30 is formed by a plurality of refractory boards 35 arranged in the vertical direction and the horizontal direction.

左右方向に隣り合う耐火ボード35は、縦辺352同士を突付けて支持材50の室外側に固定している。すなわち、左右方向に隣り合う耐火ボード35は、右側の耐火ボード35の左端の縦辺352と、左側の耐火ボード35の右端の縦辺352とが突付けて取り付けられている。そして、縦辺352同士を突付けた部分は縦辺突付け部32として形成されている。 The fireproof boards 35 adjacent to each other in the left-right direction are fixed to the outdoor side of the support member 50 by abutting the vertical sides 352 against each other. That is, the fireproof boards 35 adjacent to each other in the left-right direction are attached so that the vertical side 352 at the left end of the fireproof board 35 on the right side and the vertical side 352 at the right end of the fireproof board 35 on the left side abut each other. The portion where the vertical sides 352 are abutted against each other is formed as the vertical side abutting portion 32.

上下方向に隣り合う耐火ボード35は、横辺351同士を突付けて横辺突付け部31を形成している。すなわち、上下方向に隣り合う耐火ボード35は、上側の耐火ボード35の下端の横辺351と、下側の耐火ボード35の上端の横辺351とが突付けて取り付けられている。そして、横辺351同士を突付けた部分は横辺突付け部31として形成されている。 The fireproof boards 35 adjacent to each other in the vertical direction form the side abutting portion 31 by abutting the side sides 351 against each other. That is, the fireproof boards 35 adjacent to each other in the vertical direction are attached so that the horizontal side 351 of the lower end of the upper fireproof board 35 and the horizontal side 351 of the upper end of the lower fireproof board 35 abut each other. The portion where the lateral sides 351 are abutted against each other is formed as the lateral abutting portion 31.

各耐火ボード35の左右の端部はビスや釘などの固定具33で支持材50に固定される(図3A〜C参照)。縦辺突付け部32は支持材50の室外側に位置するのが好ましい。これにより、火災時に耐火ボード35が変形し、縦辺突付け部32に隙間が生じても、その隙間が支持材50により塞がれているため、耐火性能を低下させないようにすることができる。なお、本実施形態では、矩形状の耐火ボード35を横長に施工しているが、縦長に施工してもよい。 The left and right ends of each refractory board 35 are fixed to the support member 50 with fixtures 33 such as screws and nails (see FIGS. 3A to 3C). The vertical side abutting portion 32 is preferably located on the outdoor side of the support member 50. As a result, even if the fireproof board 35 is deformed in the event of a fire and a gap is generated in the vertical side abutting portion 32, the gap is closed by the support member 50, so that the fireproof performance can be prevented from being deteriorated. .. In the present embodiment, the rectangular refractory board 35 is installed horizontally, but it may be installed vertically.

図5に示すように、下地30の室外側(前側)には熱発泡性シート20が配置される。すなわち、耐火ボード35の室外側に熱発泡性シート20が配置される。この場合、複数の熱発泡性シート20が上下左右に並べて配置される。熱発泡性シート20はタッカーなどの固定具で下地30に固定される。すなわち、熱発泡性シート20は耐火ボード35にタッカーなどの固定具で固定される。 As shown in FIG. 5, the heat-foamable sheet 20 is arranged on the outdoor side (front side) of the base 30. That is, the heat-foamable sheet 20 is arranged on the outdoor side of the refractory board 35. In this case, a plurality of heat-foamable sheets 20 are arranged side by side in the vertical and horizontal directions. The heat-foamable sheet 20 is fixed to the base 30 with a fixture such as a tacker. That is, the heat-foamable sheet 20 is fixed to the refractory board 35 with a fixture such as a tacker.

ここで、熱発泡性シート20の表面にはマーク部23が設けられていることが好ましい。マーク部23は熱発泡性シート20を下地30に取り付ける際の目安になる。例えば、マーク部23は左右方向に長く線状に形成されており、作業者がマーク部23と横辺突付け部31とを位置合わせしながら固定具で熱発泡性シート20を固定していく。またマーク部23を目安にして上下方向で隣り合う熱発泡性シート20の重ね寸法を調整することもできる。またマーク部23を破線で形成し、その破線の間隔を例えば100mmピッチなど等間隔にすることができる。この場合、破線の間隔を目安にして熱発泡性シート20を施工することができる。さらに熱発泡性シート20の幅方向中央を中心として線対称となる位置にもマーク部23の破線をもう一方のマーク部23の破線と幅方向に一致して形成し、線対称となるマーク部23の破線同士を一致させ、熱発泡性シート20を直角での切断加工する際の目安にすることもできる。 Here, it is preferable that the mark portion 23 is provided on the surface of the heat-foamable sheet 20. The mark portion 23 serves as a guide when attaching the heat-foamable sheet 20 to the base 30. For example, the mark portion 23 is formed in a long linear shape in the left-right direction, and the operator fixes the heat-foamable sheet 20 with a fixture while aligning the mark portion 23 and the side abutting portion 31. .. It is also possible to adjust the stacking dimensions of the heat-foamable sheets 20 adjacent to each other in the vertical direction with the mark portion 23 as a guide. Further, the mark portion 23 can be formed by a broken line, and the interval between the broken lines can be made equal, for example, at a pitch of 100 mm. In this case, the heat-foamable sheet 20 can be constructed with the interval of the broken lines as a guide. Further, a broken line of the mark portion 23 is formed at a position that is line-symmetrical about the center of the heat-foamable sheet 20 in the width direction so as to coincide with the broken line of the other mark portion 23 in the width direction, and the mark portion is line-symmetrical. It is also possible to match the broken lines of 23 with each other and use it as a guide when cutting the heat-foamable sheet 20 at a right angle.

本実施形態に係る耐火構造1において、横辺突付け部31には、耐火性強化手段21が設けられている。耐火性強化手段21は、単体(一枚)の熱発泡性シート20よりも耐火性を向上(強化)している構造を有している。すなわち、耐火性強化手段21が設けられている箇所は、設けられていない箇所よりも耐火性が向上する。耐火性強化手段21が設けられた横辺突付け部31は、下地30の他の部分よりも耐火性が向上する。 In the fireproof structure 1 according to the present embodiment, the side abutting portion 31 is provided with the fireproof strengthening means 21. The fire resistance strengthening means 21 has a structure in which the fire resistance is improved (strengthened) as compared with the heat foamable sheet 20 of a single body (one sheet). That is, the place where the fire resistance strengthening means 21 is provided has improved fire resistance as compared with the place where the fire resistance strengthening means 21 is not provided. The side abutting portion 31 provided with the fire resistance strengthening means 21 has improved fire resistance as compared with other portions of the base 30.

耐火性強化手段21は、各種の形態に形成することができるが、例えば、上下方向に隣り合う熱発泡性シート20の横辺端部26同士を横辺突付け部31に対応する位置で重ね合わせた構造を含むことが好ましい。これにより、上下方向で隣り合う熱発泡性シート20により、左右方向に延びる帯状の耐火性強化手段21が形成される。例えば、図3Aに示すように、耐火性強化手段21は、熱発泡性シート20の横辺端部26同士を重ねて形成することができる。また耐火性強化手段21は、例えば、図3Bに示すように、熱発泡性シート20の横辺端部26を折り返すことにより、熱発泡性シート20が二重に重なった部分を耐火性強化手段21として形成することができる。また図3Cに示すように、熱発泡性シート20の表面に短片状の他の熱発泡性シート(耐火シート部材)25を重ね、二枚のシート状の熱発泡性シート20が重なった部分を耐火性強化手段21として形成することができる。この他に、例えば、シート状の熱発泡性シート20の一部を他の部分よりも厚肉に形成し、この厚肉部分を耐火性強化手段21として形成してもよい。 The fire resistance strengthening means 21 can be formed in various forms. For example, the lateral side end portions 26 of the heat-foamable sheets 20 adjacent to each other in the vertical direction are overlapped at a position corresponding to the lateral side abutting portion 31. It is preferable to include a combined structure. As a result, the heat-foamable sheets 20 adjacent to each other in the vertical direction form a band-shaped fire resistance strengthening means 21 extending in the left-right direction. For example, as shown in FIG. 3A, the fire resistance strengthening means 21 can be formed by overlapping the lateral side end portions 26 of the heat foamable sheet 20. Further, as shown in FIG. 3B, for example, the fire resistance strengthening means 21 is a fire resistance strengthening means for the portion where the heat foaming sheet 20 is doubly overlapped by folding back the lateral side end portion 26 of the heat foaming sheet 20. It can be formed as 21. Further, as shown in FIG. 3C, another short piece-shaped heat-foaming sheet (fireproof sheet member) 25 is superposed on the surface of the heat-foaming sheet 20, and the portion where the two sheet-shaped heat-foaming sheets 20 overlap is formed. It can be formed as the fire resistance enhancing means 21. In addition to this, for example, a part of the sheet-shaped heat-foamable sheet 20 may be formed to be thicker than the other parts, and this thick part may be formed as the fire resistance enhancing means 21.

本実施形態に係る耐火構造1において、耐火性強化手段21を構成する横辺端部26同士の重ね合わせ部分の幅L1が5mm以上であることが好ましい。ここで幅L1とは、横辺端部26同士の重なっている部分の上下方向の寸法である。この重ね合わせ部分の幅L1は30mm以上がより好ましく、50mm以上がさらに好ましい。幅L1は大きくなるほど、耐火構造1の耐火性能が向上するので好ましい。また幅L1の上限は100mm以下が好ましい。この場合、横辺突付け部31が過剰に保護されることが少なくなる。 In the refractory structure 1 according to the present embodiment, it is preferable that the width L1 of the overlapping portion of the lateral side end portions 26 constituting the refractory strengthening means 21 is 5 mm or more. Here, the width L1 is a dimension in the vertical direction of the overlapping portion of the lateral side end portions 26. The width L1 of the overlapped portion is more preferably 30 mm or more, further preferably 50 mm or more. The larger the width L1, the better the fire resistance performance of the fire resistance structure 1, which is preferable. The upper limit of the width L1 is preferably 100 mm or less. In this case, the side abutting portion 31 is less likely to be excessively protected.

本実施形態に係る耐火構造1において、左右方向に隣り合う熱発泡性シート20の縦辺端部27同士を、耐火ボード35の縦辺352同士を突付けた部分に対応する位置で重ね合わせた構造を含むことが好ましい。左右方向に隣り合う熱発泡性シート20の縦辺端部27同士を重ね合わせることにより、耐火性強化手段22が形成される。このように上下方向に隣り合う熱発泡性シート20の横辺端部26同士を重ね合わせることにより、左右方向に延びる耐火性強化手段21が形成され、左右方向に隣り合う熱発泡性シート20の縦辺端部27同士を重ね合わせることにより、上下方向に延びる耐火性強化手段22が形成される。 In the fireproof structure 1 according to the present embodiment, the vertical side ends 27 of the heat-foamable sheets 20 adjacent to each other in the left-right direction are overlapped at a position corresponding to the portion where the vertical sides 352 of the fireproof board 35 are abutted against each other. It is preferable to include a structure. The fire resistance strengthening means 22 is formed by superimposing the vertical side end portions 27 of the heat-foamable sheets 20 adjacent to each other in the left-right direction. By superimposing the lateral side ends 26 of the heat-foamable sheets 20 adjacent to each other in the vertical direction in this way, the fire resistance strengthening means 21 extending in the left-right direction is formed, and the heat-foamable sheets 20 adjacent to each other in the left-right direction are formed. By overlapping the vertical side end portions 27 with each other, the fire resistance strengthening means 22 extending in the vertical direction is formed.

耐火性強化手段22は、耐火性強化手段21と同様に、熱発泡性シート20の縦辺端部27同士を重ねて形成する他に、例えば、熱発泡性シート20の縦辺端部27を折り返すことにより、熱発泡性シート20が二重に重なった部分を耐火性強化手段22として形成することができる。また、熱発泡性シート20の表面に短片状の他の熱発泡性シート(耐火シート部材)を重ね、二枚のシート状の熱発泡性シート20が重なった部分を耐火性強化手段22として形成することができる。この他に、例えば、シート状の熱発泡性シート20の一部を他の部分よりも厚肉に形成し、この厚肉部分を耐火性強化手段22として形成してもよい。 Similar to the fire resistance strengthening means 21, the fire resistance strengthening means 22 is formed by overlapping the vertical side end portions 27 of the heat foamable sheet 20, for example, the vertical side end portions 27 of the heat foamable sheet 20. By folding back, the portion where the heat-foamable sheets 20 are doubly overlapped can be formed as the fire resistance strengthening means 22. Further, another short piece-shaped heat-foaming sheet (fire-resistant sheet member) is superposed on the surface of the heat-foaming sheet 20, and the portion where the two sheet-shaped heat-foaming sheets 20 overlap is formed as the fire resistance strengthening means 22. can do. In addition to this, for example, a part of the sheet-shaped heat-foamable sheet 20 may be formed to be thicker than the other parts, and this thick part may be formed as the fire resistance strengthening means 22.

本実施形態に係る耐火構造1において、耐火性強化手段22を構成する縦辺端部27同士の重ね合わせ部分の幅L2が5mm以上であることが好ましい。ここで幅L2とは、縦辺端部27同士の重なっている部分の左右方向の寸法である。この重ね合わせ部分の幅L2は1mm以上がより好ましく、20mm以上がさらに好ましい。幅L2は大きくなるほど、耐火構造1の耐火性能が向上するので好ましい。また幅L2の上限は50mm以下が好ましい。この場合、縦辺突付け部32が過剰に保護されることが少なくなる。 In the refractory structure 1 according to the present embodiment, it is preferable that the width L2 of the overlapping portion of the vertical side end portions 27 constituting the refractory strengthening means 22 is 5 mm or more. Here, the width L2 is a dimension in the left-right direction of the overlapping portion of the vertical side end portions 27. The width L2 of the overlapped portion is more preferably 1 mm or more, and further preferably 20 mm or more. The larger the width L2, the better the fire resistance performance of the fire resistance structure 1, which is preferable. The upper limit of the width L2 is preferably 50 mm or less. In this case, the vertical side abutting portion 32 is less likely to be excessively protected.

上記のようにして、横辺端部26同士及び縦辺端部27同士を重ね合わせて耐火性強化手段21、22を形成する場合、耐火ボード35より僅かに大きなサイズの熱発泡性シート20が使用される。すなわち、例えば、矩形状の耐火ボード35が1820mm(長辺)×606mm(短辺)の場合、矩形状の熱発泡性シート20は、長辺1830mm以上、短辺616mm以上とすることができる。このように、耐火ボード35と熱発泡性シート20のサイズを近いものにすることで、施工、梱包、運搬などにおいて取り扱い性を向上させることができる。 When the fire-resistant strengthening means 21 and 22 are formed by superimposing the horizontal edge portions 26 and the vertical edge portions 27 on each other as described above, the heat-foamable sheet 20 having a size slightly larger than that of the refractory board 35 is formed. used. That is, for example, when the rectangular refractory board 35 has a long side of 1820 mm (long side) x 606 mm (short side), the rectangular heat-foamable sheet 20 can have a long side of 1830 mm or more and a short side of 616 mm or more. By making the sizes of the refractory board 35 and the heat-foamable sheet 20 close to each other in this way, handleability can be improved in construction, packaging, transportation, and the like.

熱発泡性シート20は、下地30に対して上から下に向かって取り付けてもよいし、下から上に向かって取り付けてもよい。また熱発泡性シート20は、下地30に対して右から左に向かって取り付けてもよいし、左から右に向かって取り付けてもよい。なお、本実施形態において、支持材50の前方に縦辺突付け部32が位置する場合、耐火性強化手段22を形成しなくてもよい。この場合、左右方向に隣り合う熱発泡性シート20の縦辺同士が突付けて配置される。左右方向に隣り合う熱発泡性シート20の縦辺の突付け部分は、支持材50及び縦辺突付け部32から左右にずれていてもよい。 The heat-foamable sheet 20 may be attached to the base 30 from top to bottom or from bottom to top. Further, the heat-foamable sheet 20 may be attached to the base 30 from right to left, or may be attached from left to right. In the present embodiment, when the vertical side abutting portion 32 is located in front of the support member 50, it is not necessary to form the fire resistance strengthening means 22. In this case, the vertical sides of the heat-foamable sheets 20 adjacent to each other in the left-right direction are arranged so as to abut against each other. The vertical side abutting portions of the heat-foamable sheets 20 adjacent to each other in the left-right direction may be laterally displaced from the support member 50 and the vertical side abutting portion 32.

上下方向に隣り合う熱発泡性シート20は、横辺端部26同士の重ね合わせ順序は特に問わない。すなわち、上の熱発泡性シート20の下端の横辺端部26と、下の熱発泡性シート20の上端の横辺端部26のいずれが表面側に配置されてもよい。同様に、左右方向に隣り合う熱発泡性シート20は、縦辺端部27同士の重ね合わせ順序は特に問わない。なお、最下部の矩形状の熱発泡性シート20を施工する場合は、矩形状の耐火ボード35の下側の長辺は、矩形状の熱発泡性シート20の下側の長辺と一致させるのが好ましい。 The heat-foamable sheets 20 adjacent to each other in the vertical direction are not particularly limited in the stacking order of the lateral side end portions 26. That is, either the side end portion 26 of the lower end of the upper heat-foamable sheet 20 or the side end portion 26 of the upper end of the lower heat-foamable sheet 20 may be arranged on the surface side. Similarly, the heat-foamable sheets 20 adjacent to each other in the left-right direction are not particularly limited in the stacking order of the vertical side end portions 27. When constructing the lowermost rectangular heat-foamable sheet 20, the lower long side of the rectangular fireproof board 35 matches the lower long side of the rectangular heat-foamable sheet 20. Is preferable.

熱発泡性シート20を下地30に全面にわたって取り付けた後、透湿防水シート65を熱発泡性シート20の前側(室外側)に取り付ける。透湿防水シート65は湿気を通し、水滴は通さないシートである。透湿防水シート65もタッカーなどの固定具で取り付けられる。透湿防水シート65は熱発泡性シート20の全面にわたって取り付けられる。なお、熱発泡性シート20が耐水性である場合、透湿防水シート65を設けなくてもよい。 After the heat-foamable sheet 20 is attached to the entire surface of the base 30, the moisture-permeable waterproof sheet 65 is attached to the front side (outdoor side) of the heat-foamable sheet 20. The moisture permeable waterproof sheet 65 is a sheet that allows moisture to pass through and does not allow water droplets to pass through. The moisture permeable waterproof sheet 65 is also attached with a fixture such as a tacker. The moisture permeable waterproof sheet 65 is attached over the entire surface of the heat foamable sheet 20. When the heat-foamable sheet 20 is water-resistant, it is not necessary to provide the moisture-permeable waterproof sheet 65.

透湿防水シート65の前側には複数の留め具80が配置される。留め具80は透湿防水シート65の前面に配置され、ビスなどの固定具86で支持材50に固定される。 A plurality of fasteners 80 are arranged on the front side of the moisture permeable waterproof sheet 65. The fastener 80 is arranged on the front surface of the moisture permeable waterproof sheet 65, and is fixed to the support member 50 by a fixture 86 such as a screw.

化粧材10は留め具80により透湿防水シート65の前方に取り付けられる。化粧材10は複数配置され、各化粧材10が複数の留め具80に保持される。すなわち、化粧材10の上端はその化粧材10の上側に配置される留め具80に引っ掛けられて保持され、化粧材10の下端はその化粧材10の下側に配置される留め具80に引っ掛けられて保持される。また上下に隣り合う化粧材10は実凸部102と実凹部101の実接合で接続される。また、図1、図2及び図6に示すように、左右方向に隣り合う化粧材10の間には目地材81が配置されている。目地材81の前側にはシーリング材83が設けられている。また最も下側の化粧材10の下方には水切り材84が設けられている。そして、化粧材10の後方には通気層85が形成されている。すなわち、化粧材10の後面と透湿防水シート65の前面との間に通気層85が形成される。 The decorative material 10 is attached to the front of the moisture permeable waterproof sheet 65 by the fastener 80. A plurality of decorative materials 10 are arranged, and each decorative material 10 is held by a plurality of fasteners 80. That is, the upper end of the decorative material 10 is hooked and held by the fastener 80 arranged on the upper side of the decorative material 10, and the lower end of the decorative material 10 is hooked on the fastener 80 arranged on the lower side of the decorative material 10. Be held. Further, the decorative materials 10 adjacent to each other on the top and bottom are connected by the actual joining of the actual convex portion 102 and the actual concave portion 101. Further, as shown in FIGS. 1, 2 and 6, the joint material 81 is arranged between the decorative materials 10 adjacent to each other in the left-right direction. A sealing material 83 is provided on the front side of the joint material 81. A drainer 84 is provided below the lowermost decorative material 10. A ventilation layer 85 is formed behind the decorative material 10. That is, the ventilation layer 85 is formed between the rear surface of the decorative material 10 and the front surface of the moisture permeable waterproof sheet 65.

隣り合う化粧材10の目地と、隣り合う耐火ボード35の目地とは、正面視において、重ならないようにずらすことが好ましい。すなわち、左右方向に隣り合う化粧材10の間のシーリング材83の位置と、左右方向に隣り合う耐火ボード35の縦辺突付け部32の位置とが、正面視において、重ならないようにずらすことが好ましい。また上下方向に隣り合う化粧材10の隣接部分11の位置と、上下方向に隣り合う耐火ボード35の横辺突付け部31の位置とが、正面視において、重ならないようにずらすことが好ましい。この場合、隣り合う化粧材10の目地及び隣接部分11に前方から火炎が侵入しても、その炎が隣り合う耐火ボード35の縦辺突付け部32及び横辺突付け部31に直接侵入しにくくなって、耐火性を向上させることができる。ただし、左右方向に隣り合う化粧材10の目地と、縦辺突付け部32とが、正面視において、支持材50に一致する場合は、化粧材10の目地と縦辺突付け部32とをずらさなくてもよい。支持材50により火炎の室内側への侵入が抑制できるからである。 It is preferable that the joints of the adjacent decorative materials 10 and the joints of the adjacent fireproof boards 35 are shifted so as not to overlap each other in the front view. That is, the position of the sealing material 83 between the decorative materials 10 adjacent to each other in the left-right direction and the position of the vertical side abutting portion 32 of the fireproof boards 35 adjacent to each other in the left-right direction are shifted so as not to overlap each other in the front view. Is preferable. Further, it is preferable that the positions of the adjacent portions 11 of the decorative materials 10 adjacent to each other in the vertical direction and the positions of the side abutting portions 31 of the fireproof boards 35 adjacent to each other in the vertical direction are shifted so as not to overlap each other in the front view. In this case, even if a flame invades the joints and adjacent portions 11 of the adjacent decorative materials 10 from the front, the flame directly invades the vertical side abutting portion 32 and the horizontal side abutting portion 31 of the adjacent refractory boards 35. It becomes difficult and the fire resistance can be improved. However, if the joints of the decorative material 10 adjacent to each other in the left-right direction and the vertical side abutting portion 32 match the support material 50 in the front view, the joints of the decorative material 10 and the vertical side abutting portion 32 are used. It does not have to be shifted. This is because the support material 50 can suppress the invasion of the flame into the room.

上記のように形成される耐火構造1では、熱発泡性シート20を備えることにより、火災発生の際に、化粧材10の室外側から加熱されて、熱発泡性シート20が発泡して膨張することにより通気層85内で膨張する。すなわち、通気層85は熱発泡性シート20が発泡して膨張するための発泡空間88として形成される。そして、これにより、発泡膨張した熱発泡性シート20の遮熱効果や遮炎効果により、火炎及び熱が屋外から屋内へと侵入するのを低減することができ、したがって、耐火性を向上させることができると共に、発泡膨張した熱発泡性シート20によって化粧材10と下地30との間に上下に連通する空間が形成されにくく、熱が化粧材10と下地30との間で上下方向に移動するのを抑制することができる。また化粧材10の室内側に熱発泡性シート20を設けることにより、熱発泡性シート20に高い耐候性や耐水性は要求されず、耐火性を向上させることができる。また熱発泡性シート20は、火災がなければ薄い材料なので、通常時は通気層85を阻害せず、また、耐火構造1の前後方向の寸法(化粧材10から下地30までの寸法)は、従来のものと比べても大きくなりにくい。 In the fireproof structure 1 formed as described above, by providing the heat-foamable sheet 20, when a fire breaks out, the heat-foamable sheet 20 is heated from the outdoor side of the decorative material 10 to foam and expand. As a result, it expands in the ventilation layer 85. That is, the ventilation layer 85 is formed as a foaming space 88 for the heat-foamable sheet 20 to foam and expand. As a result, the heat-shielding effect and the flame-shielding effect of the foamed and expanded heat-foamable sheet 20 can reduce the invasion of flames and heat from the outside to the inside, and therefore improve the fire resistance. The heat-expandable sheet 20 is foamed and expanded, so that it is difficult to form a space that communicates vertically between the decorative material 10 and the base 30, and heat is transferred in the vertical direction between the decorative material 10 and the base 30. Can be suppressed. Further, by providing the heat-foamable sheet 20 on the indoor side of the decorative material 10, high weather resistance and water resistance are not required for the heat-foamable sheet 20, and fire resistance can be improved. Further, since the heat-foamable sheet 20 is a thin material if there is no fire, it does not normally hinder the ventilation layer 85, and the dimensions of the fire-resistant structure 1 in the front-rear direction (dimensions from the decorative material 10 to the base 30) are It is hard to grow even compared to the conventional one.

(変形例)
実施形態1は、本開示の様々な実施形態の一つに過ぎない。実施形態1は、本開示の目的を達成できれば、設計等に応じて種々の変更が可能である。
(Modification example)
Embodiment 1 is just one of the various embodiments of the present disclosure. The first embodiment can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

本実施形態は、建物の外壁だけでなく、内壁、屋根、天井などに適用可能である。内壁の場合は、外壁材の代わりに、合板などの内壁材が使用される。屋根の場合は、外壁材の代わりに、屋根材が使用され、耐火ボード35で野地板が形成され、支持材50で垂木が形成される。この場合、屋根材は横葺き構造及び縦葺き構造のいずれであってもよい。天井の場合、外壁材の代わりに天井板が使用され、耐火ボード35で天井下地が形成され、支持材50で天井板支持材が形成される。 This embodiment can be applied not only to the outer wall of a building but also to the inner wall, roof, ceiling and the like. In the case of the inner wall, an inner wall material such as plywood is used instead of the outer wall material. In the case of a roof, a roofing material is used instead of the outer wall material, a refractory board 35 forms a field board, and a support material 50 forms a rafter. In this case, the roofing material may have either a horizontal roofing structure or a vertical roofing structure. In the case of a ceiling, a ceiling board is used instead of the outer wall material, a ceiling base is formed by the refractory board 35, and a ceiling board support material is formed by the support material 50.

上記では、左右方向に沿って延びる化粧材10を上下左右に並べた「横張り」構造であったが、これに限定されず、上下方向に沿って延びる化粧材10を上下左右に並べた「縦張り」構造であってもよい。 In the above, the structure is "horizontal" in which the decorative materials 10 extending in the horizontal direction are arranged vertically and horizontally, but the present invention is not limited to this, and the decorative materials 10 extending in the vertical direction are arranged vertically and horizontally. It may have a "vertical" structure.

本実施形態では、左右方向に延びる熱発泡性シート20を使用することにより、左右方向に熱発泡性シート20を隣り合わせなくてもよい。この場合、左右方向に隣り合う熱発泡性シート20の縦辺端部27同士を重ね合わせる構成も形成されない。左右方向に延びる熱発泡性シート20は、例えば、ロール状に巻かれた状態で施工に供されてもよい。 In the present embodiment, by using the heat-foamable sheet 20 extending in the left-right direction, the heat-foamable sheets 20 do not have to be adjacent to each other in the left-right direction. In this case, the structure in which the vertical side end portions 27 of the heat-foamable sheets 20 adjacent to each other in the left-right direction are overlapped with each other is not formed. The heat-foamable sheet 20 extending in the left-right direction may be used for construction in a rolled state, for example.

本実施形態では、支持材50の室内側に耐火ボードが更に設けられていてもよい。 In the present embodiment, a fireproof board may be further provided on the indoor side of the support member 50.

本実施形態では、耐火ボード35の室内側に断熱材が設けられていてもよい。この場合、断熱材としては、ロックウールボード、グラスウールボード、フェノール発泡樹脂ボードなどが使用可能である。断熱材を備えることにより、下地30よりも室内側に熱が伝わりにくくなり、これにより、耐火構造1の耐火性を向上させることができる。 In the present embodiment, a heat insulating material may be provided on the indoor side of the refractory board 35. In this case, as the heat insulating material, rock wool board, glass wool board, phenol foam resin board and the like can be used. By providing the heat insulating material, heat is less likely to be transferred to the indoor side than the base 30, whereby the fire resistance of the refractory structure 1 can be improved.

本実施形態では、支持材50は柱や間柱などの建物の構造材だけに限られない。例えば、支持材50は縦胴縁であってもよい。この場合、左右方向に隣り合う耐火ボード35は、縦胴縁の室外側で縦辺352同士が突付けられ、縦辺突付け部32が縦胴縁に対応する位置に形成されるのが好ましい。また支持材50は横胴縁であってもよい。この場合、上下方向に隣り合う耐火ボード35は、横胴縁の室外側で横辺351同士が突付けられ、横辺突付け部31が横胴縁に対応する位置に形成されるのが好ましい。なお、支持材50が縦胴縁又は横胴縁である場合、支持材50はアルミニウム製などの軽量の金属材料で形成されるのが好ましい。 In the present embodiment, the support member 50 is not limited to the structural material of the building such as columns and studs. For example, the support member 50 may have a vertical furring strip. In this case, the fireproof boards 35 adjacent to each other in the left-right direction are preferably formed so that the vertical sides 352 are abutted against each other on the outdoor side of the vertical furring strip and the vertical side abutting portion 32 is formed at a position corresponding to the vertical furring strip. .. Further, the support member 50 may be a horizontal furring strip. In this case, the fireproof boards 35 adjacent to each other in the vertical direction are preferably formed so that the lateral sides 351 are abutted against each other on the outdoor side of the horizontal furring strip, and the lateral side abutting portion 31 is formed at a position corresponding to the horizontal furring strip. .. When the support member 50 has a vertical furring strip or a horizontal furring strip, the support member 50 is preferably made of a lightweight metal material such as aluminum.

耐火性強化手段21、22は、単体(一枚)の熱発泡性シート20よりも耐火性を向上(強化)することができれば、どのような構成であってもよい。上記では、熱発泡性シート20を二枚重ねにすることにより、重なった部分の厚みが他の部分よりも厚くなって耐火性強化手段21、22として形成されている。熱発泡性シート20を二枚重ねにする場合、上下方向に隣り合う熱発泡性シート20の横辺26同士を重ね合わせたり、左右方向に隣り合う熱発泡性シート20の縦辺端部27同士を重ね合わせたりする他に、熱発泡性シート20の表面に短冊状の他の熱発泡性シート20を重ね合わせてもよい。この場合も、二枚の熱発泡性シート20が重なった部分の厚みが他の部分よりも厚くなって耐火性強化手段21、22として形成されている。なお、熱発泡性シート20は3枚以上の多数枚で重ね合わせて耐火性強化手段21、22を形成してもよい。 The fire resistance strengthening means 21 and 22 may have any configuration as long as the fire resistance can be improved (strengthened) as compared with the single (single) heat-foamable sheet 20. In the above, by stacking two heat-foamable sheets 20, the thickness of the overlapped portion becomes thicker than that of the other portions, and the fire resistance strengthening means 21 and 22 are formed. When two heat-foamable sheets 20 are stacked, the horizontal sides 26 of the heat-foamable sheets 20 adjacent to each other in the vertical direction are overlapped with each other, or the vertical side ends 27 of the heat-foamable sheets 20 adjacent to each other in the left-right direction are overlapped with each other. In addition to the combination, another strip-shaped heat-foamable sheet 20 may be superposed on the surface of the heat-foamable sheet 20. Also in this case, the thickness of the portion where the two heat-foamable sheets 20 overlap is thicker than that of the other portions, and is formed as the fire resistance strengthening means 21 and 22. The heat-foamable sheet 20 may be formed by stacking a large number of three or more sheets to form the fire resistance enhancing means 21 and 22.

耐火性強化手段21、22は、熱発泡性シート20の組成、構造及び性能を部分的に向上させて形成してもよい。例えば、熱発泡性シート20の一部に難燃性発泡剤を増量した部分を形成し、この部分を耐火性強化手段21としてもよい。耐火発泡剤を増量した部分では、他の部分に比べて、発泡倍率が高くなり、発泡後の耐火層の厚みが大きくなったり断熱性が向上する。また、例えば、発泡時、熱発泡性シート20の耐火性強化手段21、22に対応する箇所における独立気泡の割合が、他の箇所における独立気泡の割合よりも高くなるよう構成してもよい。このように発泡時の独立気泡の割合が多くなったり、発泡倍率が高くなったりすると、発泡後の耐火性強化手段21、22の熱伝導率が低くなって断熱性が高まり、耐火構造1の耐火性能が向上する。 The fire resistance enhancing means 21 and 22 may be formed by partially improving the composition, structure and performance of the heat foamable sheet 20. For example, a portion in which the amount of the flame-retardant foaming agent is increased may be formed on a part of the heat-foamable sheet 20, and this portion may be used as the fire resistance enhancing means 21. In the portion where the amount of the refractory foaming agent is increased, the foaming ratio is higher than in the other portions, the thickness of the refractory layer after foaming is increased, and the heat insulating property is improved. Further, for example, at the time of foaming, the ratio of closed cells at the locations corresponding to the fire resistance strengthening means 21 and 22 of the heat-foamable sheet 20 may be higher than the ratio of closed cells at other locations. When the proportion of closed cells at the time of foaming is increased or the foaming ratio is increased in this way, the thermal conductivity of the refractory strengthening means 21 and 22 after foaming is lowered and the heat insulating property is enhanced, so that the fireproof structure 1 Fire resistance is improved.

また他例としては、熱発泡性シート20の表面にアルミニウムテープなどの不燃性金属シートを貼り付けて耐火性強化手段21、22を形成してもよい。また他例としては、耐火ボード35の横辺突付け部31に対応する位置にアルミニウムテープなどの不燃性金属シートを貼り付けて耐火性強化手段21、22を形成してもよい。なお、耐火性強化手段21、22は、施工工程のどの時点で形成してもよい。例えば、耐火ボード35の横辺突付け部31に対応する位置にアルミニウムテープを貼り付ける場合、耐火ボード35を支持材50に取り付けた後、横辺突付け部31に対応する位置にアルミニウムテープを貼り付けてもよいし、耐火ボード35を支持材50に取り付ける前に、予め、耐火ボード35の横辺突付け部31に対応する位置にアルミニウムテープを貼り付け、この後、耐火ボード35を支持材50に取り付けてもよい。 As another example, a nonflammable metal sheet such as an aluminum tape may be attached to the surface of the heat-foamable sheet 20 to form the fire resistance strengthening means 21 and 22. As another example, the refractory strengthening means 21 and 22 may be formed by sticking a nonflammable metal sheet such as an aluminum tape at a position corresponding to the side abutting portion 31 of the refractory board 35. The fire resistance strengthening means 21 and 22 may be formed at any time in the construction process. For example, when attaching the aluminum tape to the position corresponding to the side abutting portion 31 of the refractory board 35, after attaching the refractory board 35 to the support member 50, attach the aluminum tape to the position corresponding to the side abutting portion 31. It may be attached, or before attaching the refractory board 35 to the support material 50, an aluminum tape is attached in advance at a position corresponding to the side abutting portion 31 of the refractory board 35, and then the refractory board 35 is supported. It may be attached to the material 50.

本実施形態において、縦辺突付け部32が支持材50の位置と一致しているが、これに限定されず、縦辺突付け部32が支持材50の位置と一致していなくてもよい。この場合、熱発泡性シート20の上下方向に沿った耐火性強化手段22は縦辺突付け部32に対応する位置に形成されるのが好ましい。 In the present embodiment, the vertical side abutting portion 32 coincides with the position of the support member 50, but the present invention is not limited to this, and the vertical side abutting portion 32 does not have to coincide with the position of the support member 50. .. In this case, it is preferable that the fire resistance strengthening means 22 along the vertical direction of the heat-foamable sheet 20 is formed at a position corresponding to the vertical side abutting portion 32.

上記では、複数の耐火ボード35を施工して下地30を形成した後、複数の熱発泡性シート20を施工したが、これに限られず、耐火ボード35と熱発泡性シート20とを予め(施工前に)一体化してシート付き耐火ボード36を形成した後、複数のシート付き耐火ボード36を施工してもよい。 In the above, a plurality of refractory boards 35 are constructed to form a base 30, and then a plurality of heat-foamable sheets 20 are constructed. However, the present invention is not limited to this, and the refractory board 35 and the heat-foamable sheet 20 are previously (constructed). After (before) integrating to form the refractory board 36 with a sheet, a plurality of refractory boards 36 with a sheet may be constructed.

図7A及び図7Bは、シート付き耐火ボード36の一例を示している。シート付き耐火ボード36は、上記と同様の横長の矩形状の耐火ボード35の片面(表面)に、上記と同様の横長の矩形状の熱発泡性シート20が設けられている。正面視において、熱発泡性シート20の左右方向の寸法は、耐火ボード35の左右方向の寸法よりも長く形成されている。したがって、耐火ボード35の左の縦辺352よりも外側に熱発泡性シート20の左の縦辺端部27が突出し、耐火ボード35の右の縦辺352よりも外側に熱発泡性シート20の右の縦辺端部27が突出している。また熱発泡性シート20の上下方向の寸法は耐火ボード35の上下方向の寸法よりも長く形成されている。したがって、熱発泡性シート20の上の横辺端部26は、耐火ボード35の上の横辺351よりも上に突出している。また熱発泡性シート20の下の横辺端部26は、耐火ボード35の下の横辺351よりも下に突出している。耐火ボード35の表面と熱発泡性シート20とは、ほぼ全面にわたって接着等されている。 7A and 7B show an example of the refractory board 36 with a sheet. In the refractory board 36 with a sheet, a horizontally long rectangular heat-foamable sheet 20 similar to the above is provided on one side (surface) of the horizontally long rectangular fireproof board 35 similar to the above. In front view, the left-right dimension of the heat-foamable sheet 20 is formed longer than the left-right dimension of the refractory board 35. Therefore, the left vertical side end portion 27 of the heat-foamable sheet 20 protrudes outside the left vertical side 352 of the fireproof board 35, and the heat-foamable sheet 20 extends outside the right vertical side 352 of the fireproof board 35. The right vertical side end portion 27 protrudes. Further, the vertical dimension of the heat foamable sheet 20 is formed longer than the vertical dimension of the refractory board 35. Therefore, the lateral side end portion 26 on the heat-foamable sheet 20 projects above the lateral side 351 on the refractory board 35. Further, the lateral side end portion 26 under the heat-foamable sheet 20 projects below the lateral side 351 under the fireproof board 35. The surface of the refractory board 35 and the heat-foamable sheet 20 are adhered to almost the entire surface.

上記と同様の下地30と熱発泡性シート20は、図7Bのように、複数のシート付き耐火ボード36を上下方向及び左右方向に並べ、支持材50に取り付けることによって形成される。すなわち、複数の耐火ボード35で下地30が形成され、下地30の表面に複数の熱発泡性シート20が配置された状態となる。この場合、熱発泡性シート20は、耐火ボード36の表面の四周端部と貼り付いていないのが好ましい。また上下方向に隣り合う耐火ボード35の横辺突付け部31に対応する部分では、上下方向に隣り合う熱発泡性シート20の横辺端部26同士が重なり合って耐火性強化手段21が形成され、左右方向に隣り合う耐火ボード35の縦辺突付け部32に対応する部分では、左右方向に隣り合う熱発泡性シート20の縦辺端部27同士が重なり合って耐火性強化手段22が形成される。 The base 30 and the heat-foamable sheet 20 similar to the above are formed by arranging a plurality of refractory boards with sheets 36 in the vertical direction and the horizontal direction and attaching them to the support member 50 as shown in FIG. 7B. That is, the base 30 is formed by the plurality of refractory boards 35, and the plurality of heat-foamable sheets 20 are arranged on the surface of the base 30. In this case, the heat-foamable sheet 20 is preferably not attached to the four peripheral ends of the surface of the refractory board 36. Further, in the portion corresponding to the side abutting portion 31 of the fireproof boards 35 adjacent to each other in the vertical direction, the lateral side end portions 26 of the heat foamable sheets 20 adjacent to each other in the vertical direction overlap each other to form the fire resistance strengthening means 21. In the portion corresponding to the vertical side abutting portion 32 of the fireproof boards 35 adjacent to each other in the left-right direction, the vertical side end portions 27 of the heat-foamable sheets 20 adjacent to each other in the left-right direction overlap each other to form the fire resistance strengthening means 22. To.

そして、シート付き耐火ボード36を使用した場合は、耐火ボード35と熱発泡性シート20とを一度の作業で同時に施工することができ、施工性が向上する。また耐火ボード35と熱発泡性シート20とを別々に梱包、搬送する必要がなく、作業性が向上する。 When the refractory board 36 with a sheet is used, the refractory board 35 and the heat-foamable sheet 20 can be installed at the same time in one operation, and the workability is improved. Further, it is not necessary to separately pack and transport the refractory board 35 and the heat-foamable sheet 20, which improves workability.

(まとめ)
以上説明したように、第1の態様に係る耐火構造(1)は、室内側から室外側に向かって、支持材(50)、耐火ボード(35)、熱発泡性シート(20)、発泡空間(88)及び化粧材(10)を順次配置している。左右方向に隣り合う耐火ボード(35)は、縦辺(352)同士を突付けて支持材(50)の室外側に固定している。上下方向に隣り合う耐火ボード(35)は、横辺(351)同士を突付けて横辺突付け部(31)を形成している。横辺突付け部(31)に耐火性強化手段(21)を設ける。
(Summary)
As described above, in the fireproof structure (1) according to the first aspect, the support material (50), the fireproof board (35), the heat foamable sheet (20), and the foaming space are formed from the indoor side to the outdoor side. (88) and the decorative material (10) are arranged in order. The fireproof boards (35) adjacent to each other in the left-right direction are fixed to the outdoor side of the support material (50) by abutting the vertical sides (352) against each other. The fireproof boards (35) adjacent to each other in the vertical direction form a side abutting portion (31) by abutting the side sides (351) with each other. A fire resistance strengthening means (21) is provided at the side abutting portion (31).

この態様によれば、耐火性強化手段(21)により横辺突付け部(31)に火炎や熱が侵入しにくくなり、耐火性能を向上させることができる、という利点がある。 According to this aspect, there is an advantage that flames and heat are less likely to enter the side abutting portion (31) by the fire resistance strengthening means (21), and the fire resistance performance can be improved.

第2の態様に係る耐火構造(1)は、第1の態様において、耐火性強化手段(21)は、上下方向に隣り合う熱発泡性シート(20)の横辺端部(26)同士を横辺突付け部(31)に対応する位置で重ね合わせた構造を含む。 In the fire-resistant structure (1) according to the second aspect, in the first aspect, the fire-resistant strengthening means (21) connects the lateral edge portions (26) of the heat-foamable sheets (20) adjacent to each other in the vertical direction. Includes a structure that is overlapped at a position corresponding to the side abutting portion (31).

この態様によれば、熱発泡性シート(20)を重ね合わせるだけで耐火性強化手段(21)を簡単に形成することができる、という利点がある。 According to this aspect, there is an advantage that the refractory enhancing means (21) can be easily formed only by stacking the heat-foamable sheets (20).

第3の態様に係る耐火構造(1)は、第2の態様において、横辺端部(26)同士の重ね合わせ部分の幅が5mm以上である。 In the fireproof structure (1) according to the third aspect, in the second aspect, the width of the overlapping portion between the lateral side end portions (26) is 5 mm or more.

この態様によれば、横辺突付け部(31)を十分に耐火性強化手段(21)で保護することができ、耐火性に優れる耐火構造(1)が得やすい、という利点がある。 According to this aspect, there is an advantage that the lateral side abutting portion (31) can be sufficiently protected by the refractory strengthening means (21), and the refractory structure (1) having excellent fire resistance can be easily obtained.

第4の態様に係る耐火構造(1)は、第1〜3のいずれか一つの態様において、左右方向に隣り合う熱発泡性シート(20)の縦辺端部(27)同士を、耐火ボード(35)の縦辺(352)同士を突付けた部分に対応する位置で重ね合わせた構造を含む。 In the fireproof structure (1) according to the fourth aspect, in any one of the first to third aspects, the vertical side ends (27) of the heat foamable sheets (20) adjacent to each other in the left-right direction are connected to each other by a fireproof board. Includes a structure in which the vertical sides (352) of (35) are overlapped at positions corresponding to the abutting portions.

この態様によれば、縦辺端部(27)同士を重ね合わせた部分で、耐火ボード(35)の縦辺(352)同士を突付けた部分に火炎や熱が侵入しにくくなり、耐火性能を向上させることができる、という利点がある。 According to this aspect, in the portion where the vertical side ends (27) are overlapped with each other, flames and heat are less likely to enter the portion where the vertical sides (352) of the fireproof board (35) are abutted against each other, and the fire resistance performance is improved. There is an advantage that can be improved.

第5の態様に係る耐火構造(1)は、第4の態様において、縦辺端部(27)同士の重ね合わせ部分の幅が5mm以上である。 In the fireproof structure (1) according to the fifth aspect, in the fourth aspect, the width of the overlapping portion between the vertical side end portions (27) is 5 mm or more.

この態様によれば、縦辺端部(27)同士を重ね合わせた部分で、耐火ボード(35)の縦辺(352)同士を突付けた部分を十分に保護することができ、耐火性に優れる耐火構造(1)が得やすい、という利点がある。 According to this aspect, the portion where the vertical side ends (27) are overlapped with each other can sufficiently protect the portion of the fireproof board (35) where the vertical sides (352) are abutted against each other, resulting in fire resistance. There is an advantage that an excellent refractory structure (1) can be easily obtained.

第6の態様に係る耐火構造(1)は、第1〜5のいずれか一つの態様において、支持材(50)の室内側に耐火ボード(35)が設けられていない。 In the fireproof structure (1) according to the sixth aspect, in any one of the first to fifth aspects, the fireproof board (35) is not provided on the indoor side of the support material (50).

この態様によれば、支持材(50)の室内側に耐火ボード(35)を施工する必要がなくなり、耐火構造(1)を簡素化することができる、という利点がある。 According to this aspect, there is an advantage that it is not necessary to install a fireproof board (35) on the indoor side of the support material (50), and the fireproof structure (1) can be simplified.

1 耐火構造
20 熱発泡性シート
21 耐火性強化手段
22 耐火性強化手段
26 横辺端部
27 縦辺端部
31 横辺突付け部
35 耐火ボード
351 横辺
352 縦辺
21 耐火性強化手段
22 耐火性強化手段
26 横辺端部
27 縦辺端部
50 支持材
1 Fire-resistant structure 20 Thermal foaming sheet 21 Fire-resistant strengthening means 22 Fire-resistant strengthening means 26 Horizontal edge 27 Vertical side edge 31 Horizontal side abutting 35 Fire-resistant board 351 Horizontal side 352 Vertical side 21 Fire-resistant strengthening means 22 Fire-resistant Sex strengthening means 26 Horizontal edge 27 Vertical edge 50 Support material

Claims (6)

室内側から室外側に向かって、支持材、耐火ボード、熱発泡性シート、発泡空間及び化粧材を順次配置し、
室内側から室外側に向かう方向を前方向としたとき、左右方向に隣り合う前記耐火ボードは、縦辺同士を突付けて前記支持材の前記室外側に固定し、
上下方向に隣り合う前記耐火ボードは、横辺同士を突付けて横辺突付け部を形成し、
前記横辺突付け部に耐火性強化手段を設ける、
耐火構造。
Supporting materials, fireproof boards, heat-foamable sheets, foaming spaces, and decorative materials are arranged in order from the indoor side to the outdoor side.
When the direction from the indoor side to the outdoor side is the front direction, the fireproof boards adjacent to each other in the left-right direction abut each other on the vertical sides and are fixed to the outdoor side of the support material.
The fireproof boards adjacent to each other in the vertical direction form a side abutting portion by abutting the side sides with each other.
A fire resistance strengthening means is provided at the side abutting portion.
Fireproof structure.
請求項1において、
前記耐火性強化手段は、上下方向に隣り合う前記熱発泡性シートの横辺端部同士を前記横辺突付け部に対応する位置で重ね合わせた構造を含む、
耐火構造。
In claim 1,
The fire resistance enhancing means includes a structure in which the lateral side ends of the heat-foamable sheets adjacent to each other in the vertical direction are overlapped at a position corresponding to the lateral abutting portion.
Fireproof structure.
請求項2において、
前記横辺端部同士の重ね合わせ部分の幅が5mm以上である、
耐火構造。
In claim 2,
The width of the overlapped portion between the lateral edge portions is 5 mm or more.
Fireproof structure.
請求項1〜3のいずれか1項において、
左右方向に隣り合う前記熱発泡性シートの縦辺端部同士を、前記耐火ボードの縦辺同士を突付けた部分に対応する位置で重ね合わせた構造を含む、
耐火構造。
In any one of claims 1 to 3,
Includes a structure in which the vertical side ends of the heat-foamable sheets adjacent to each other in the left-right direction are overlapped at positions corresponding to the portions where the vertical sides of the fireproof board are abutted.
Fireproof structure.
請求項4において、
前記縦辺端部同士の重ね合わせ部分の幅が5mm以上である、
耐火構造。
In claim 4,
The width of the overlapping portion between the vertical side ends is 5 mm or more.
Fireproof structure.
請求項1〜5のいずれか1項において、
前記支持材の室内側に耐火ボードが設けられていない、
耐火構造。
In any one of claims 1 to 5,
A fireproof board is not provided on the indoor side of the support material.
Fireproof structure.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11117421A (en) * 1997-10-13 1999-04-27 Sk Kaken Co Ltd Fire-resistant dressing method
JP2006161435A (en) * 2004-12-08 2006-06-22 Sekisui Chem Co Ltd Steel-frame covering structure
US20090288358A1 (en) * 2008-05-22 2009-11-26 Snyder Leland D Insulative and weather-resistant building construction
JP2011094350A (en) * 2009-10-28 2011-05-12 Kikusui Chemical Industries Co Ltd Fire-proofing wall structure, and foamable fireproof sheet for use in the same
JP2013155574A (en) * 2012-01-31 2013-08-15 Kmew Co Ltd Inner wall structure
JP2016084665A (en) * 2014-10-28 2016-05-19 ケイミュー株式会社 Fireproof structure
JP7319837B2 (en) * 2018-06-19 2023-08-02 ケイミュー株式会社 Fireproof structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11117421A (en) * 1997-10-13 1999-04-27 Sk Kaken Co Ltd Fire-resistant dressing method
JP2006161435A (en) * 2004-12-08 2006-06-22 Sekisui Chem Co Ltd Steel-frame covering structure
US20090288358A1 (en) * 2008-05-22 2009-11-26 Snyder Leland D Insulative and weather-resistant building construction
JP2011094350A (en) * 2009-10-28 2011-05-12 Kikusui Chemical Industries Co Ltd Fire-proofing wall structure, and foamable fireproof sheet for use in the same
JP2013155574A (en) * 2012-01-31 2013-08-15 Kmew Co Ltd Inner wall structure
JP2016084665A (en) * 2014-10-28 2016-05-19 ケイミュー株式会社 Fireproof structure
JP7319837B2 (en) * 2018-06-19 2023-08-02 ケイミュー株式会社 Fireproof structure

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