JP6634198B2 - Coating structure - Google Patents
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- JP6634198B2 JP6634198B2 JP2013261044A JP2013261044A JP6634198B2 JP 6634198 B2 JP6634198 B2 JP 6634198B2 JP 2013261044 A JP2013261044 A JP 2013261044A JP 2013261044 A JP2013261044 A JP 2013261044A JP 6634198 B2 JP6634198 B2 JP 6634198B2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- 229920002978 Vinylon Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
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- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
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- 239000012779 reinforcing material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
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- 238000009423 ventilation Methods 0.000 description 1
- 229920006312 vinyl chloride fiber Polymers 0.000 description 1
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Description
本発明は、新規な鉄骨梁の被覆構造体に関するものである。 The present invention relates to a novel steel beam covering structure.
建築物、土木構築物等の構造物が火災等によって高温に晒された場合には、これら構造物を構成する鉄骨の物理的強度が急激に低下するという問題がある。これに対し、鉄骨に耐熱性被覆材を被覆し、火災時の鉄骨の温度上昇を遅延させて、鉄骨の機械的強度の低下を抑制する耐熱性被覆構造が知られている。 When structures such as buildings and civil engineering structures are exposed to high temperatures due to fires or the like, there is a problem that the physical strength of steel frames constituting these structures rapidly decreases. On the other hand, there is known a heat-resistant coating structure in which a steel frame is coated with a heat-resistant coating material to delay a rise in temperature of the steel frame during a fire and to suppress a decrease in mechanical strength of the steel frame.
特に、鉄骨梁には、空調用や換気用のダクト等を配管するために、予め複数の貫通孔を有するものが使用されており、配管設置が必要な貫通孔に配管が挿通される。このような貫通孔を有する鉄骨梁の耐熱性被覆構造として、従来種々の形態のものが提案されている。この耐熱性被覆構造は、配管が行われていない状態で施工されるものであり、例えば、予め鉄骨梁に設けられた貫通孔の内側に、ロックウール等の保温性を有する第一被覆部材（耐火スリーブ）を挿通させた後に、第ニ被覆部材を設けた構造（例えば、特許文献１）、あるいは貫通孔の両方の外側へ延長するように熱膨張性耐火シートを設けた後、ロックウール等の耐火被覆材を設けた構造（例えば、特許文献２）等がある。 In particular, a steel beam having a plurality of through holes is used in advance for piping air-conditioning and ventilation ducts and the like, and the piping is inserted into the through holes that require piping installation. Various types of heat-resistant covering structures for steel beams having such through holes have been proposed. This heat-resistant coating structure is constructed in a state where piping is not performed. For example, a first coating member (such as rock wool) having heat insulation properties is provided inside a through hole provided in a steel beam in advance. (A fire-resistant sleeve), and then a structure in which a second covering member is provided (for example, Patent Document 1), or a heat-expandable fire-resistant sheet is provided so as to extend outside both of the through holes, and then rock wool or the like is provided. (For example, Patent Document 2).
しかしながら、上記特許文献１は、予め貫通孔の形状に合わせた耐火スリーブの成形が必要となり、鉄骨構造が複雑な場合には、様々な形態の成形体が必要となりその施工も煩雑となるおそれがある。上記特許文献２も、貫通孔の内径に沿って熱膨張性耐火シートを接着する必要があり、その施工も煩雑となるおそれがある。また、特許文献１、２はいずれも貫通孔と鉄骨梁外側の被覆部材を別々に設けるため、その継ぎ目等において耐熱保護性が不十分となるおそれがある。さらに、特許文献１、２はで配管が挿通されない貫通孔は開孔状態のままであり、火災が発生した場合には、この開孔部から炎や熱が伝わり火災を拡大するおそれがある。
However, in the above-mentioned
本発明は、上述のような問題点に鑑みなされたものであり、貫通孔を有する鉄骨梁の被覆構造体として、簡便な施工により耐熱保護性等に優れた被覆構造体を提供することを目的とするものである。 The present invention has been made in view of the above-described problems, and has as its object to provide, as a covering structure of a steel beam having a through-hole, a covering structure having excellent heat resistance and the like by simple construction. It is assumed that.
上記課題を解決するため、本発明者は鋭意検討の結果、ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートが一体化された領域を形成していることを特徴とする被覆構造体、及び、さらに上記一体化された領域の内側（貫通孔の開孔中心近傍）に、切り込み部または開孔部を有することを特徴とする被覆構造体に想到し、本発明を完成させるに到った。 In order to solve the above problems, the present inventors have conducted intensive studies and as a result, both sides of the web plate are covered with a thermofoamable resin sheet so as to cover the through holes. A covering structure, wherein the heat-foamable resin sheet forms an integrated region, and a cut portion or a cutout inside the integrated region (in the vicinity of the center of the through hole). The inventor has conceived a covering structure characterized by having an opening, and has completed the present invention.
すなわち、本発明は以下の特徴を有するものである。 That is, the present invention has the following features.
１． ウェブプレートに貫通孔を有する鉄骨梁の被覆構造体であり、
ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートが一体化された領域を形成し、
上記両面の熱発泡性樹脂シートが一体化された領域は、貫通孔の開孔縁から内側へ５ｍｍ以上であり、貫通孔の開孔縁が熱発泡性樹脂シートにより被覆されていることを特徴とする被覆構造体。
２．ウェブプレートに貫通孔を有する鉄骨梁の被覆構造体であり、
ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートが一体化された領域を形成しており、
上記両面の熱発泡性樹脂シートが一体化された領域は、貫通孔の開孔縁から内側へ５ｍｍ以上であり、
さらに上記一体化された領域よりも内側に、切り込み部または開孔部を有し、貫通孔の開孔縁が熱発泡性樹脂シートにより被覆されていることを特徴とする被覆構造体。
３．ウェブプレートに貫通孔を有する鉄骨梁の両面に、それぞれ接着層を介して熱発泡性樹脂シートを被覆する第１工程、
少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートを、接着剤を介して接着一体化、熱融着により一体化、あるいはこれらの組み合わせにより一体化する第２工程、
を含む１．に記載の被覆構造体の施工方法。
４．ウェブプレートに貫通孔を有する鉄骨梁の両面に、それぞれ接着層を介して熱発泡性樹脂シートを被覆する第１工程、
少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートを、接着剤を介して接着一体化、熱融着により一体化、あるいはこれらの組み合わせにより一体化する第２工程、
上記貫通孔の開孔縁の内側近傍よりも内側の熱発泡性樹脂シートに、切り込み部または開孔部を形成する第３工程、
を含む２．に記載の被覆構造体の施工方法。
1. A steel beam covering structure having a through hole in a web plate,
On both sides of the web plate, a heat-foamable resin sheet is coated so as to cover the through-hole, and at least in the vicinity of the inside of the opening edge of the through-hole, forming a region where the heat-foamable resin sheets on both sides are integrated ,
The area where the thermofoamable resin sheets on both sides are integrated is 5 mm or more inward from the opening edge of the through hole, and the opening edge of the through hole is covered with the thermofoamable resin sheet. Coating structure.
2. A steel beam covering structure having a through hole in a web plate,
On both sides of the web plate, a thermofoamable resin sheet is coated so as to cover the through hole, and at least in the vicinity of the inside of the opening edge of the through hole, an area where the thermofoamable resin sheets on both sides are integrated is formed. ,
The area where the heat-foamable resin sheets on both sides are integrated is 5 mm or more inward from the opening edge of the through hole,
Further, a covered structure having a cut portion or an opening portion inside the integrated region, wherein an opening edge of the through hole is covered with a thermofoamable resin sheet.
3. A first step of coating a thermofoamable resin sheet on both sides of a steel beam having a through hole in a web plate via an adhesive layer,
At least in the vicinity of the inside of the opening edge of the through-hole, the second step of integrating the heat-foamable resin sheets on both surfaces by bonding and bonding via an adhesive, by heat fusion, or by a combination of these.
Including 1. The method for constructing a coated structure according to
4. A first step of coating a thermofoamable resin sheet on both sides of a steel beam having a through hole in a web plate via an adhesive layer,
At least in the vicinity of the inside of the opening edge of the through-hole, the second step of integrating the heat-foamable resin sheets on both sides by bonding and bonding via an adhesive, by heat fusion, or by a combination of these.
A third step of forming a cut or an opening in the thermofoamable resin sheet inside the vicinity of the inside of the opening edge of the through hole;
1. The method for constructing a coated structure according to
上記１．の被覆構造体は、ウェブプレートに貫通孔を有する鉄骨梁の被覆構造体であり、ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、熱発泡性樹脂シートが一体化された領域を形成するものである。このような被覆構造体によれば、鉄骨梁の表面だけではなく、貫通孔が熱発泡性樹脂シートで塞がれているため、優れた耐熱保護性が得られる。また、配管が必要な場合には、中心部に切り込み部や開孔部を形成するだけよく、施工も簡便である。 The above 1. The coating structure is a steel beam coating structure having a through hole in the web plate, the both sides of the web plate is coated with a thermofoamable resin sheet to close the through hole, at least the opening edge of the through hole. In the vicinity of the inside, a region where the thermally foamable resin sheet is integrated is formed. According to such a covering structure, since not only the surface of the steel beam but also the through-hole is closed by the heat-foamable resin sheet, excellent heat-resistant protection is obtained. Further, when piping is required, it is only necessary to form a notch or a hole at the center, and the construction is simple.
上記２．の被覆構造体は、ウェブプレートに貫通孔を有する鉄骨梁の被覆構造体であり、ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、熱発泡性樹脂シートが一体化された領域を形成しており、
さらに上記一体化された領域よりも内側（貫通孔の開孔中心近傍）に、切り込み部または開孔部を有するものである。このような被覆構造体によれば、鉄骨梁の表面だけではなく、貫通孔も熱発泡性樹脂シートで完全に被覆されているため、優れた耐熱保護性が得られる。また、配管を配置する場合は、切り込み部または開孔部に配管等を挿通するのみであり施工が容易である。
The above 2. The coating structure is a steel beam coating structure having a through hole in the web plate, both sides of the web plate is coated with a thermofoamable resin sheet to close the through hole, at least the opening edge of the through hole. In the vicinity of the inner side, a region where the thermally foamable resin sheet is integrated is formed,
Further, a notch or an opening is provided inside the integrated region (near the center of the opening of the through hole). According to such a covering structure, not only the surface of the steel beam but also the through holes are completely covered with the thermofoamable resin sheet, so that excellent heat protection properties can be obtained. In addition, when arranging a pipe, it is only necessary to insert the pipe or the like into the cutout or the opening, and the construction is easy.
１．鉄骨梁（Ｈ型）
１ａ．上フランジ
１ｂ．下フランジ
１ｃ．ウェブ
１ｄ．貫通孔
１ｅ．貫通孔の開孔縁
２．熱発泡性樹脂シート
３．切り込み部
４．開孔部
５．開孔縁の内側近傍
６．床材
７．配管
1. Steel beam (H type)
1a.
6.
以下、本発明を実施するための形態について説明する。 Hereinafter, embodiments for carrying out the present invention will be described.
［鉄骨梁］
本発明は、鉄骨構造物を構成する鉄骨梁の表面被覆に適用することができる。鉄骨梁としては、Ｈ型またはＩ型鉄骨梁等が使用できる。本発明のＨ型またはＩ型鉄骨としては、断面がＨ字型またはＩ字型であり、上フランジプレートと下フランジプレートをウェブプレートにより連結して形成された態様のものが使用される。Ｈ型鉄骨は、フランジプレート幅が広く、フランジプレート内外面が平行なものである。これに対して、Ｉ型鉄骨は、通常、フランジプレート幅が狭く、フランジプレート内側に勾配がつけられているものである。
[Steel beam]
INDUSTRIAL APPLICATION This invention can be applied to the surface coating of the steel beam which comprises a steel structure. H-shaped or I-shaped steel beams can be used as the steel beams. As the H-shaped or I-shaped steel frame of the present invention, a steel frame having an H-shaped or I-shaped cross section and formed by connecting an upper flange plate and a lower flange plate with a web plate is used. The H-shaped steel frame has a wide flange plate and parallel inner and outer surfaces of the flange plate. On the other hand, the I-type steel frame usually has a narrow flange plate width and has a slope inside the flange plate.
鉄骨梁は、予め、その表面が防錆処理されているものであることが好ましい。防錆処理方法としては、例えば、金属めっき等化成処理方法や、公知の錆止め塗料を塗付する方法、等が挙げられる。 It is preferable that the surface of the steel beam is rust-proofed in advance. Examples of the rust preventive treatment method include a chemical conversion treatment method such as metal plating and a method of applying a known rust preventive paint.
図１は、本発明で使用する鉄骨梁の一例を示す斜視図である。図１は、Ｈ型鉄骨梁であり、上フランジ（１ａ）と下フランジ（１ｂ）をウェブプレート（１ｃ）により連結して形成され、ウェブプレート（１ｃ）には少なくとも１つ以上の貫通孔（１ｄ）を有している。 FIG. 1 is a perspective view showing an example of a steel beam used in the present invention. FIG. 1 shows an H-shaped steel beam, which is formed by connecting an upper flange (1a) and a lower flange (1b) by a web plate (1c). The web plate (1c) has at least one or more through-holes ( 1d).
図２は、本発明の被覆構造体の一例を示す斜視図である。
［熱発泡性樹脂シート］
本発明の熱発泡性樹脂シート（２）は、火災等により周囲温度が所定の発泡温度に達すると発泡し、炭化断熱層を形成するものである。このような熱発泡性樹脂シート（２）で貫通孔を塞ぐことによって、遮炎性を有するとともに、火災時には、炭化断熱層を形成して貫通孔を閉塞することができるため高い耐熱保護性を発揮することができる。熱発泡性樹脂シート（２）としては、構成成分として樹脂成分、難燃剤、発泡剤、炭化剤及び充填剤を含有するものが好適である。このうち、樹脂成分としてはビニル系樹脂、ポリスチレン系樹脂、ポリプロピレン系樹脂、アクリル系樹脂、ポリアミド系樹脂、ポリウレタン系樹脂、酢酸ビニル樹脂等の熱可塑性樹脂、難燃剤としてはポリリン酸アンモニウム等、発泡剤としてはメラミン、ジシアンジアミド、アゾジカーボンアミド等、炭化剤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等、充填剤としては二酸化チタン等が挙げられる。
FIG. 2 is a perspective view showing an example of the coating structure of the present invention.
[Heat-foamable resin sheet]
The thermally foamable resin sheet (2) of the present invention foams when the ambient temperature reaches a predetermined foaming temperature due to a fire or the like, and forms a carbonized heat insulating layer. By blocking the through-holes with such a heat-foamable resin sheet (2), it has a flame-insulating property, and in the event of a fire, a carbonized heat-insulating layer can be formed to close the through-holes. Can be demonstrated. As the heat-expandable resin sheet (2), a sheet containing a resin component, a flame retardant, a foaming agent, a carbonizing agent, and a filler as constituent components is suitable. Among them, a vinyl resin, a polystyrene resin, a polypropylene resin, an acrylic resin, a polyamide resin, a polyurethane resin, a thermoplastic resin such as a vinyl acetate resin as a resin component, and a foaming agent such as ammonium polyphosphate as a flame retardant. Examples of the agent include melamine, dicyandiamide and azodicarbonamide, examples of the carbonizing agent include pentaerythritol and dipentaerythritol, and examples of the filler include titanium dioxide.
各成分の配合比率は、好ましくは、固形分換算で、樹脂成分１００重量部に対して、難燃剤５０〜１０００重量部、発泡剤５〜５００重量部、炭化剤５〜６００重量部、及び充填剤１０〜３００重量部である。熱発泡性樹脂シート（２）の厚みは、適用部位等により適宜設定すれば良いが、好ましくは０．２〜１０ｍｍ程度、より好ましく０．５〜６ｍｍ程度である。 The compounding ratio of each component is preferably 50 to 1000 parts by weight of a flame retardant, 5 to 500 parts by weight of a foaming agent, 5 to 600 parts by weight of a carbonizing agent and 100 parts by weight of a resin component in terms of solid content. 10 to 300 parts by weight of the agent. The thickness of the thermofoamable resin sheet (2) may be appropriately set depending on the application site and the like, but is preferably about 0.2 to 10 mm, and more preferably about 0.5 to 6 mm.
また、本発明の熱発泡性樹脂シート（２）は、上記構成成分を含むシートのみから構成されていてもよいが、裏面（鉄骨側）に繊維質シートが積層されていることが好ましい。これにより、形成された炭化断熱層の脱落防止効果を高めることができる。 Further, the thermofoamable resin sheet (2) of the present invention may be composed of only a sheet containing the above-mentioned components, but it is preferable that a fibrous sheet is laminated on the back surface (the steel frame side). Thereby, the effect of preventing the formed carbonized heat insulating layer from falling off can be enhanced.
このような繊維質シートとしては、例えば、有機繊維、無機繊維等を含むシートが挙げられる。 Examples of such a fibrous sheet include a sheet containing organic fibers, inorganic fibers, and the like.
有機繊維としては、例えば、パルプ繊維、ポリエステル繊維、ポリプロピレン繊維、アラミド繊維、ビニロン繊維、ポリエチレン繊維、ポリアリレート繊維、ＰＢＯ繊維、ナイロン繊維、アクリル繊維、塩化ビニル繊維、セルロース繊維等、またはそれらの織布、不織布等が挙げられる。有機繊維は、１５０℃程度の温度領域で溶融して液体状態になるようなものであってもよいが、かかる温度領域で溶融しないものの方が好ましい。 Examples of the organic fiber include pulp fiber, polyester fiber, polypropylene fiber, aramid fiber, vinylon fiber, polyethylene fiber, polyarylate fiber, PBO fiber, nylon fiber, acrylic fiber, vinyl chloride fiber, cellulose fiber, and the like, or woven fabric thereof. Cloth, non-woven fabric and the like can be mentioned. The organic fiber may be one that melts in a temperature range of about 150 ° C. to be in a liquid state, but one that does not melt in such a temperature range is preferable.
無機繊維としては、例えば、ロックウール、ガラス繊維、シリカ繊維、シリカ−アルミナ繊維、カーボン繊維、炭化珪素繊維等、またはそれらの織布、不織布等、さらに鉄、銅等の金属細線が挙げられる。このような無機繊維は、熱を加えても溶融せず、さらに補強材としても作用し、発泡した炭化断熱層を保持できるので、Ｈ型鉄骨（１）からの脱落防止効果に優れている。特に無機繊維が網目構造を有していれば、熱発泡性樹脂シート（２）及びこれに熱を加えることにより形成される炭化断熱層をより効率よく補強することができ、Ｈ型鉄骨（１）からの脱落を防止することができるので好ましい。 Examples of the inorganic fiber include rock wool, glass fiber, silica fiber, silica-alumina fiber, carbon fiber, silicon carbide fiber, and the like, and woven fabric, nonwoven fabric, and the like, and fine metal wires such as iron and copper. Such an inorganic fiber does not melt even when heat is applied, and also acts as a reinforcing material, and can retain the foamed carbonized heat insulating layer, and thus has an excellent effect of preventing the inorganic fiber from falling off the H-shaped steel frame (1). In particular, if the inorganic fibers have a network structure, the heat-foamable resin sheet (2) and the carbonized heat insulating layer formed by applying heat thereto can be reinforced more efficiently, and the H-shaped steel frame (1) ) Is preferable because it can be prevented from falling off.
繊維質シートは、無機繊維と有機繊維からなる複合シートであって、該無機繊維が網目状に配列されたシートであり、その少なくとも一方（一面）に有機繊維の織布又は不織布が積層され、無機繊維の網目の一部又は全部が有機繊維で塞がれているようなものが好ましい。無機繊維と有機繊維を組み合わせることにより、熱による溶融成分が吸着され、継ぎ目部分の剥れ等を防止することができる。また、網目を有機繊維で塞いでいれば、熱発泡性樹脂シート（２）製造時に無機繊維の網目構造が崩れにくく、簡便に製造することができる。 The fibrous sheet is a composite sheet composed of inorganic fibers and organic fibers, and is a sheet in which the inorganic fibers are arranged in a network, and a woven or non-woven fabric of organic fibers is laminated on at least one (one side), It is preferable that a part or all of the network of the inorganic fibers is covered with the organic fibers. By combining the inorganic fiber and the organic fiber, a molten component due to heat is adsorbed, and peeling of the joint portion can be prevented. Further, if the mesh is closed with the organic fibers, the mesh structure of the inorganic fibers is less likely to collapse during the production of the thermofoamable resin sheet (2), and the production can be performed easily.
本発明の被覆構造体の一例を図２に示す。図２は、貫通孔を有するＨ型鉄骨（１）に熱発泡性樹脂シート（２）を被覆した例である。なお、以下の例は、本発明は、Ｈ型鉄骨（１）同様にＩ型鉄骨にも適用可能である。 FIG. 2 shows an example of the coating structure of the present invention. FIG. 2 shows an example in which an H-shaped steel frame (1) having a through hole is coated with a thermally foamable resin sheet (2). In the following examples, the present invention is applicable to an I-type steel frame as well as an H-type steel frame (1).
本発明の被覆構造体は、Ｈ型鉄骨（１）の貫通孔（１ｄ）を塞ぐように、Ｈ型鉄骨（１）の長手方向に複数の熱発泡性樹脂シート（２）が設けられている。該熱発泡性樹脂シート（２）同士の継ぎ目部分は、つき合わせても、重なり部を有していてもよいが、重なり部を有する方が好ましい。また、熱発泡性樹脂シート（２）は、所望の耐熱保護性に合わせて、２枚以上重ねて被覆してもよい。本発明では、Ｈ型鉄骨（１）の表面に熱発泡性樹脂シート（２）を被覆する場合、接着剤を用いることが好ましい。 In the covering structure of the present invention, a plurality of thermally foamable resin sheets (2) are provided in the longitudinal direction of the H-shaped steel frame (1) so as to close the through holes (1d) of the H-shaped steel frame (1). . The seam portions of the thermofoamable resin sheets (2) may be in contact with each other or have an overlapping portion, but preferably have an overlapping portion. Further, the heat-foamable resin sheet (2) may be covered with two or more sheets in accordance with the desired heat-resistant protection property. In the present invention, when covering the surface of the H-shaped steel frame (1) with the heat-foamable resin sheet (2), it is preferable to use an adhesive.
本発明における接着剤としては、例えば、アクリル樹脂、シリコン樹脂、エポキシ樹脂、ビニル樹脂、フェノール樹脂、ポリエステル樹脂、ウレタン樹脂、パラフィン等を主原料とした水分散型、水溶性型、溶剤型の接着剤等、公知のものを使用することができる。接着剤には、必要に応じて、上述した熱発泡性樹脂シートに配合されるような難燃剤、発泡剤、炭化剤、充填剤、等を添加することもできる。また、本発明において、接着剤には粘着剤も包含される。 As the adhesive in the present invention, for example, an acrylic resin, a silicone resin, an epoxy resin, a vinyl resin, a phenol resin, a polyester resin, a urethane resin, a water-dispersed type, a water-soluble type, and a solvent type adhesive mainly using paraffin, etc. Known agents such as agents can be used. If necessary, a flame retardant, a foaming agent, a carbonizing agent, a filler, and the like, which are blended in the above-described thermally foamable resin sheet, can be added to the adhesive. In the present invention, the adhesive also includes a pressure-sensitive adhesive.
図３は、図２の貫通孔部分の拡大断面図である。
図３に示すように、本発明の被覆構造体は、鉄骨梁のウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁（１ｅ）の内側近傍（５）において、両面の熱発泡性樹脂シート（２）が一体化されているものである。熱発泡性樹脂シート（２）が一体化される領域は適宜設定すればよいが、好ましくは貫通孔（１ｄ）の開孔縁（１ｅ）から内側へ５ｍｍ以上（より好ましくは１０ｍｍ以上）の領域であり、貫通孔（１ｄ）の全面が一体化されていてもよい。特に、貫通孔を完全に塞ぐ態様の場合は、貫通孔（１ｄ）の全面が一体化されていることが好ましい。これにより、貫通孔（１ｄ）の開孔縁（１ｅ）が熱発泡性樹脂シート（２）により被覆されるため、耐熱保護性を高めることができる。熱発泡性樹脂シート（２）を一体化する方法としては、接着剤を介して接着一体化する方法、または熱融着により一体化する方法等が挙げられ、これらの方法を組み合わせて行ってもよい。
FIG. 3 is an enlarged cross-sectional view of the through-hole portion of FIG.
As shown in FIG. 3, in the covering structure of the present invention, both sides of the web plate of the steel beam are covered with a thermofoamable resin sheet so as to cover the through holes, and at least the inside of the opening edge (1 e) of the through holes. In the vicinity (5), the thermally foamable resin sheets (2) on both sides are integrated. The area in which the heat-expandable resin sheet (2) is integrated may be set as appropriate, but is preferably 5 mm or more (more preferably 10 mm or more) inward from the opening edge (1e) of the through hole (1d). And the entire surface of the through hole (1d) may be integrated. In particular, in a case where the through hole is completely closed, it is preferable that the entire surface of the through hole (1d) is integrated. Thereby, since the opening edge (1e) of the through-hole (1d) is covered with the heat-foamable resin sheet (2), the heat protection property can be improved. Examples of a method of integrating the thermally foamable resin sheet (2) include a method of bonding and integrating via an adhesive, a method of integrating by heat fusion, and the like. Good.
図４は、本発明の被覆構造体の別の一例を示す斜視図である。 FIG. 4 is a perspective view showing another example of the coating structure of the present invention.
図４の被覆構造体は、貫通孔（１ｄ）の開孔縁（１ｅ）の内側近傍（５）よりも内側（貫通孔の開孔中心近傍）に、切り込み部（３）を有するものである。また、図５は、図４の貫通孔部分の拡大断面図である。 The covering structure shown in FIG. 4 has a cut portion (3) inside (around the center of the through hole) near the inside (5) of the inside edge (1e) of the through hole (1d). . FIG. 5 is an enlarged sectional view of the through-hole portion in FIG.
図５に示すように、この態様では、貫通孔の開孔縁（１ｅ）の内側近傍（５）よりも内側（貫通孔の開孔中心近傍）に切り込み部（３）を有する。切り込み部（３）は、配置する配管が挿通可能な程度に切り込みが形成されたものであればよく、その形状は特に限定されない。切り込みを入れる場合は、少なくとも貫通孔（１ｄ）の開孔縁（１ｅ）から切り込みの端部までの距離が５ｍｍ以上（好ましくは１０ｍｍ以上）となるようにすることが好ましい。このような範囲である場合、遮炎性を有するとともに、火災時には、炭化断熱層を形成して貫通孔を閉塞することができるため高い耐熱保護性を発揮することができる。なお、熱発泡性樹脂シート（２）に切り込みを入れる場合は、カッター、ナイフ等を使用すればよい。 As shown in FIG. 5, in this embodiment, the notch (3) is provided inside (in the vicinity of the center of the opening of the through hole) more than the inside (5) of the inside of the opening edge (1e) of the through hole. The cut portion (3) is not particularly limited as long as the cut portion is formed so that the pipe to be arranged can be inserted. When making a cut, it is preferable that at least the distance from the opening edge (1e) of the through hole (1d) to the end of the cut is 5 mm or more (preferably 10 mm or more). In the case of such a range, while having a flame-insulating property, in the event of a fire, a carbonized heat-insulating layer can be formed to close the through-hole, so that high heat-protection properties can be exhibited. In addition, when making a cut in the thermally foamable resin sheet (2), a cutter, a knife or the like may be used.
図６は、本発明の被覆構造体の別の一例を示す斜視図である。 FIG. 6 is a perspective view showing another example of the coating structure of the present invention.
図６の被覆構造体は、貫通孔の開孔縁（１ｅ）の内側近傍（５）よりも内側（貫通孔の開孔中心近傍）に、開孔部（４）を有するものである。また、図７は、図６の貫通孔部分の拡大断面図である。 The covering structure shown in FIG. 6 has an opening portion (4) inside (around the center of the through hole) near the inside (5) of the inside edge (1e) of the through hole. FIG. 7 is an enlarged sectional view of the through-hole portion in FIG.
図７に示すように、この態様では、貫通孔の開孔縁（１ｅ）の内側近傍（５）よりも内側（貫通孔の開孔中心近傍）に、開孔部（４）を有する。開孔部（４）の形状は、円形、楕円形、多角形等、いずれの形状であってもよく、その大きさは、鉄骨梁の貫通孔（１ｄ）よりも小さいものであり、配置する配管が挿通可能な程度の大きさであればよい。本発明では、少なくとも鉄骨梁の貫通孔（１ｄ）の開孔縁（１ｅ）のから熱発泡性樹脂シート（２）の切断面までの距離が少なくとも５ｍｍ以上（好ましくは１０ｍｍ以上）となるようにすることが好ましく、配管との間隙が少ないことが好ましい。このような範囲の場合、遮炎性を有するとともに、火災時には、炭化断熱層を形成して貫通孔を閉塞することができるため高い耐熱保護性を発揮することができる。なお、熱発泡性樹脂シート（２）の切断（くり抜き）は、カッター、ナイフ等を使用すればよい。 As shown in FIG. 7, in this embodiment, an opening portion (4) is provided inside (around the center of the through hole) near the inside (5) of the inside edge (1e) of the through hole. The shape of the opening (4) may be any shape such as a circle, an ellipse, and a polygon, and the size is smaller than the through hole (1d) of the steel beam, and is arranged. It is sufficient that the pipe is large enough to be inserted. In the present invention, the distance from at least the opening edge (1e) of the through hole (1d) of the steel beam to the cut surface of the thermally foamable resin sheet (2) is at least 5 mm or more (preferably 10 mm or more). Preferably, the gap with the pipe is small. In the case of such a range, in addition to having a flame barrier property, at the time of fire, a carbonized heat insulating layer can be formed to close the through-hole, so that high heat protection can be exhibited. In addition, what is necessary is just to use a cutter, a knife, etc. for cutting | disconnection (cutting out) of the thermally foamable resin sheet (2).
図８は、熱発泡性樹脂シート（２）の切り込み部（３）から配管（７）が挿通された状態を示すものである。
図９は、熱発泡性樹脂シート（２）の開孔部（４）から配管（７）が挿通された状態を示すものである。
FIG. 8 shows a state in which the pipe (7) is inserted from the cut portion (3) of the thermally foamable resin sheet (2).
FIG. 9 shows a state in which the pipe (7) is inserted through the opening (4) of the thermally foamable resin sheet (2).
本発明の被覆構造体の施工方法としては、上記被覆構造体が得られる限り、特に限定されないが、例えば、
ウェブプレートに貫通孔を有する鉄骨梁の両面に、それぞれ接着層を介して熱発泡性樹脂シートを被覆する第１工程、
少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートを一体化する第２工程、
を含む施工方法が挙げられる。
The method for applying the coating structure of the present invention is not particularly limited as long as the coating structure is obtained, for example,
A first step of coating a thermofoamable resin sheet on both sides of a steel beam having a through hole in a web plate via an adhesive layer,
A second step of integrating the heat-foamable resin sheets on both sides at least near the inside of the opening edge of the through hole;
Construction methods including:
また、貫通孔に配管を挿通させる場合には、
第３工程として、上記貫通孔の開孔縁の内側近傍よりも内側の熱発泡性樹脂シートに、切り込み部または開孔部を形成する工程を含む施工方法等が挙げられる。なお、本発明では、上記第３工程を上記第２工程よりも先に行ってもよく、上記第３工程の後に、上記第２工程を繰り返し行ってもよい。
Also, when piping is inserted through the through hole,
As a third step, a construction method or the like including a step of forming a cut portion or an opening in the thermofoamable resin sheet inside the vicinity of the inside of the opening edge of the through hole is exemplified. In the present invention, the third step may be performed before the second step, or the second step may be repeatedly performed after the third step.
上記第１工程においては、鉄骨梁の表面全体（貫通孔を塞ぐように）を熱発泡性樹脂シートで被覆する。
上記第２工程において、少なくとも貫通孔（１ｄ）の開孔縁（１ｅ）の内側近傍（５）の熱発泡性樹脂シートを一体化する。この際、接着剤を用いて一体化する場合は、上記第１工程と同時に行うこともできる。また、熱融着により一体化する場合は、アイロン、ヒートガン等を用いることが好ましい。
第３工程においては、配管が挿通可能となるように、貫通孔の中心付近の熱発泡性樹脂シートに切り込み部を形成、または鉄骨梁の貫通孔よりも小さい開孔部を形成する。
In the first step, the entire surface of the steel beam (so as to cover the through hole) is covered with a thermofoamable resin sheet.
In the second step, at least the thermally foamable resin sheet near the inside (5) of the opening edge (1e) of the through hole (1d) is integrated. At this time, when integrating using an adhesive, it can be performed simultaneously with the first step. In the case of integrating by heat fusion, it is preferable to use an iron, a heat gun or the like.
In the third step, a cut portion is formed in the thermofoamable resin sheet near the center of the through hole, or an opening smaller than the through hole of the steel beam is formed so that the pipe can be inserted.
上記の施工方法によれば、貫通孔を有する鉄骨梁において、予め貫通孔の処理を必要とせず、簡便な方法で耐火被覆が可能となる。特に、図１０に示すように、複数の貫通孔を有する鉄骨梁において、配管設置の必要な貫通孔のみに配管を挿通し、その他の貫通孔は熱発泡性樹脂シートで塞ぐことが可能となるため、簡便な施工で優れた耐熱保護性を有する被覆構造体を得ることができる。 According to the above construction method, in a steel beam having a through-hole, it is not necessary to treat the through-hole in advance, and the fireproof coating can be performed by a simple method. In particular, as shown in FIG. 10, in a steel beam having a plurality of through holes, it is possible to insert a pipe only into a through hole for which a pipe needs to be installed, and to close the other through holes with a thermofoamable resin sheet. Therefore, a coated structure having excellent heat-resistant protection can be obtained by simple construction.
以下に具体的な実施例を示す。
（熱発泡性樹脂シートの製造）
アクリル樹脂１００重量部、メラミン９０重量部、ジペンタエリスリトール９０重量部、ポリリン酸アンモニウム３２０重量部、酸化チタン１００重量部を主成分する混合物を温度１２０℃に設定した加圧ニーダーで混練して熱発泡性樹脂シート用混練物を調製後、ガラス不織布上に混練物を積層し圧延ローラーによってシート状に加工し、膜厚１．５ｍｍの熱発泡性樹脂シート（４５０ｍｍ×１２００ｍｍ）を作製した。
Hereinafter, specific examples will be described.
(Manufacture of thermofoamable resin sheet)
A mixture mainly composed of 100 parts by weight of an acrylic resin, 90 parts by weight of melamine, 90 parts by weight of dipentaerythritol, 320 parts by weight of ammonium polyphosphate and 100 parts by weight of titanium oxide is kneaded in a pressure kneader set at a temperature of 120 ° C. and heated. After preparing the kneaded material for an expandable resin sheet, the kneaded material was laminated on a glass nonwoven fabric and processed into a sheet shape by a rolling roller, thereby producing a thermally expandable resin sheet (450 mm × 1200 mm) having a thickness of 1.5 mm.
（試験例１）
床板（ＡＬＣ板）にＨ型鉄骨（Ｈ４００×２００×８×１３ｍｍ、長さ１２００ｍｍ、貫通孔φ２００ｍｍ）を設置した。作製した熱発泡性樹脂シートのガラス不織布側がＨ型鉄骨側とし、貫通孔を塞ぐように熱発泡性樹脂シートをアクリル系接着剤で貼り付けた。また、熱発泡性樹脂シート同士の継ぎ目部分は、重なり幅２０ｍｍとなるようにアクリル系接着剤で貼り付けた。同時に、両面の熱発泡性樹脂シートを、貫通孔部分の全面領域で一体化した。
次いで、貫通孔の開孔中心近傍（貫通孔の開孔縁から切り込みの端部までの距離２０ｍｍ）に切り込み部を形成した。以上より、図４に例示される被覆構造体を得た。
上記被覆構造体の貫通孔部分に、スリーブ管（スパイラル管、φ１００×１０００ｍｍ）を挿通したものを試験体とした。作製した試験体につき、ＩＳＯ８３４の標準加熱曲線に準じて１時間加熱試験を行った。その結果、貫通孔部分においても均一な炭化断熱層が形成され、良好な耐熱保護性能を示した。
(Test Example 1)
An H-shaped steel frame (H400 × 200 × 8 × 13 mm, length 1200 mm, through hole φ200 mm) was installed on a floor plate (ALC plate). The glass foam nonwoven fabric side of the produced heat-expandable resin sheet was the H-shaped steel frame side, and the heat-expandable resin sheet was attached with an acrylic adhesive so as to cover the through holes. In addition, a joint portion between the heat-foamable resin sheets was attached with an acrylic adhesive so as to have an overlap width of 20 mm. At the same time, the thermofoamable resin sheets on both sides were integrated over the entire area of the through-hole portion.
Next, a cut portion was formed near the center of the opening of the through hole (a distance of 20 mm from the opening edge of the through hole to the end of the cut). From the above, a coated structure illustrated in FIG. 4 was obtained.
A test piece was obtained by inserting a sleeve tube (spiral tube, φ100 × 1000 mm) into the through-hole portion of the above-mentioned coated structure. The prepared test body was subjected to a heating test for one hour according to the standard heating curve of ISO834. As a result, a uniform carbonized heat-insulating layer was formed even in the through-hole portion, and good heat-resistance protection performance was exhibited.
（試験例２）
床板（ＡＬＣ板）にＨ型鉄骨（Ｈ４００×２００×８×１３ｍｍ、長さ１２００ｍｍ、貫通孔φ２００ｍｍ）を設置した。作製した熱発泡性樹脂シートのガラス不織布側がＨ型鉄骨側とし、貫通孔を塞ぐように熱発泡性樹脂シートをアクリル系接着剤で貼り付けた。また、熱発泡性樹脂シート同士の継ぎ目部分は、重なり幅２０ｍｍとなるようにアクリル系接着剤で貼り付けた。同時に、両面の熱発泡性樹脂シートを、貫通孔部分の全面領域で一体化した。
次いで、貫通孔の開孔中心近傍に円形の開孔部を形成した（貫通孔の開孔縁から開孔部までの距離２０ｍｍ）。以上より、図６に例示される被覆構造体を得た。
上記被覆構造体の貫通孔部分に、スリーブ管（スパイラル管、φ１００×１０００ｍｍ）を挿通したものを試験体とした。作製した試験体につき、ＩＳＯ８３４の標準加熱曲線に準じて１時間加熱試験を行った。その結果、貫通孔部分においても均一な炭化断熱層が形成され、良好な耐熱保護性能を示した。
(Test Example 2)
An H-shaped steel frame (H400 × 200 × 8 × 13 mm, length 1200 mm, through hole φ200 mm) was installed on a floor plate (ALC plate). The heat-expandable resin sheet thus prepared was made to have an H-shaped steel frame side on the glass nonwoven fabric side, and the heat-expandable resin sheet was attached with an acrylic adhesive so as to cover the through holes. In addition, a joint portion between the heat-foamable resin sheets was attached with an acrylic adhesive so as to have an overlap width of 20 mm. At the same time, the thermofoamable resin sheets on both sides were integrated over the entire area of the through-hole portion.
Next, a circular opening was formed near the center of the opening of the through hole (distance from the opening edge of the through hole to the opening was 20 mm). From the above, a coating structure illustrated in FIG. 6 was obtained.
A test piece was obtained by inserting a sleeve tube (spiral tube, φ100 × 1000 mm) into the through-hole portion of the above-mentioned coated structure. The prepared test body was subjected to a heating test for one hour according to the standard heating curve of ISO834. As a result, a uniform carbonized heat-insulating layer was formed even in the through-hole portion, and good heat-resistance protection performance was exhibited.
Claims (4)
ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートが一体化された領域を形成し、
上記両面の熱発泡性樹脂シートが一体化された領域は、貫通孔の開孔縁から内側へ５ｍｍ以上であり、貫通孔の開孔縁が熱発泡性樹脂シートにより被覆されていることを特徴とする被覆構造体。 A steel beam covering structure having a through hole in a web plate,
On both sides of the web plate, a heat-foamable resin sheet is coated so as to cover the through-hole, and at least in the vicinity of the inside of the opening edge of the through-hole, forming a region where the heat-foamable resin sheets on both sides are integrated ,
The area where the thermofoamable resin sheets on both sides are integrated is 5 mm or more inward from the opening edge of the through hole, and the opening edge of the through hole is covered with the thermofoamable resin sheet. Coating structure.
ウェブプレート両面に、貫通孔を塞ぐように熱発泡性樹脂シートが被覆され、少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートが一体化された領域を形成しており、
上記両面の熱発泡性樹脂シートが一体化された領域は、貫通孔の開孔縁から内側へ５ｍｍ以上であり、
さらに上記一体化された領域よりも内側に、切り込み部または開孔部を有し、貫通孔の開孔縁が熱発泡性樹脂シートにより被覆されていることを特徴とする被覆構造体。 A steel beam covering structure having a through hole in a web plate,
On both sides of the web plate, a thermofoamable resin sheet is coated so as to cover the through hole, and at least in the vicinity of the inside of the opening edge of the through hole, an area where the thermofoamable resin sheets on both sides are integrated is formed. ,
The area where the heat-foamable resin sheets on both sides are integrated is 5 mm or more inward from the opening edge of the through hole,
Further, a covered structure having a cut portion or an opening portion inside the integrated region, wherein an opening edge of the through hole is covered with a thermofoamable resin sheet.
少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートを、接着剤を介して接着一体化、熱融着により一体化、あるいはこれらの組み合わせにより一体化する第２工程、
を含む請求項１に記載の被覆構造体の施工方法。 A first step of coating a thermofoamable resin sheet on both sides of a steel beam having a through hole in a web plate via an adhesive layer,
At least in the vicinity of the inside of the opening edge of the through-hole, the second step of integrating the heat-foamable resin sheets on both surfaces by bonding and bonding via an adhesive, by heat fusion, or by a combination of these.
The method for constructing a coated structure according to claim 1, comprising:
少なくとも貫通孔の開孔縁の内側近傍において、両面の熱発泡性樹脂シートを、接着剤を介して接着一体化、熱融着により一体化、あるいはこれらの組み合わせにより一体化する第２工程、
上記貫通孔の開孔縁の内側近傍よりも内側の熱発泡性樹脂シートに、切り込み部または開孔部を形成する第３工程、
を含む請求項２に記載の被覆構造体の施工方法。
A first step of coating a thermofoamable resin sheet on both sides of a steel beam having a through hole in a web plate via an adhesive layer,
At least in the vicinity of the inside of the opening edge of the through-hole, the second step of integrating the heat-foamable resin sheets on both surfaces by bonding and bonding via an adhesive, by heat fusion, or by a combination of these.
A third step of forming a cut or an opening in the thermofoamable resin sheet inside the vicinity of the inside of the opening edge of the through hole;
The method for constructing a coated structure according to claim 2, comprising:
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| JP5141592B2 (en) * | 2009-02-23 | 2013-02-13 | 積水ハウス株式会社 | Refractory coating structure in the pipe insertion part of the beam |
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