JP2023053831A - Fixing bracket for fireproof covering member, fireproof structure, and construction method of fireproof structure - Google Patents

Fixing bracket for fireproof covering member, fireproof structure, and construction method of fireproof structure Download PDF

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JP2023053831A
JP2023053831A JP2021163125A JP2021163125A JP2023053831A JP 2023053831 A JP2023053831 A JP 2023053831A JP 2021163125 A JP2021163125 A JP 2021163125A JP 2021163125 A JP2021163125 A JP 2021163125A JP 2023053831 A JP2023053831 A JP 2023053831A
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fireproof
fixture
covering material
fireproof covering
protrusion
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勉 芳谷
Tsutomu Yoshitani
有 秀島
Tamotsu Hideshima
理子 大長
Masako Onaga
俊明 廣畑
Toshiaki Hirohata
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Furukawa Electric Co Ltd
Sekisui House Ltd
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Furukawa Electric Co Ltd
Sekisui House Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires

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Abstract

To provide a fixing bracket for a fireproof covering member used for a fireproof structure capable of constructing at a lower cost with satisfactory workability.SOLUTION: A securing bracket 20 is attached to a steel beam flange for fixing a fire resistive covering member 5. The securing bracket includes: a first protrusion 21 and a second protrusion 22 whose tip penetrates the fire resistive covering member 5; a first supporting portion 24 that supports the first protrusion 21 vertically; a second support portion 25 that supports the second protrusion vertically; a connecting part 26 that connects the first supporting portion 24 and the second support portion 25 therebetween; an abutting portion 27 provided to a first supporting portion 24, which abuts on one side of the flange; and a pressing portion 28 arranged to face the abutting portion 27 while biasing the same toward the other side of the flange. The connecting part 26 has a first connecting part 33 and a second connecting part 34. The first connecting part 33 is held movably with respect to the second connecting part 34.SELECTED DRAWING: Figure 4A

Description

本発明は、梁や柱などの構造体に耐火被覆材が被覆された耐火構造等に関するものである。 TECHNICAL FIELD The present invention relates to a fire-resistant structure or the like in which a structural body such as a beam or column is coated with a fire-resistant covering material.

梁や柱などの鋼製の構造体は、火災等により高温となると耐力が低下するため、これを避けるために、耐火構造が必要である。
このような耐火構造としては、例えば、所定の厚みのロックウール等の耐火材を吹き付けて被覆する方法がある（例えば特許文献１）。特許文献１では、鉄骨梁に耐火材が吹き付けられて覆われる。 Steel structures such as beams and columns are required to have a fire-resistant structure in order to avoid the loss of strength when exposed to high temperatures due to fire or the like.
As such a fireproof structure, for example, there is a method of coating by spraying a fireproof material such as rock wool having a predetermined thickness (for example, Patent Document 1). In Patent Literature 1, steel beams are covered by being sprayed with a refractory material.

特開２０１７－１２８８４４号公報JP 2017-128844 A

鉄骨に耐火材を吹き付ける方法は、安価であり、大型の構造体にも適用が容易であるが、作業環境が著しく悪く、吹き付け耐火材の吹き付け厚みや密度を管理することも困難である。また、吸水によって性能が劣化するため、事前に工場で鉄骨に吹き付け施工してから運搬するのも困難である。 The method of spraying refractory material onto steel frames is inexpensive and easy to apply to large structures, but the working environment is extremely poor, and it is difficult to control the thickness and density of the sprayed refractory material. In addition, since the performance deteriorates due to water absorption, it is difficult to spray the steel frame in advance at the factory and then transport it.

これに対し、ロックウールを鉄骨に巻き付けて、その状態でピンを鉄骨に溶接することでロックウールを固定する方法も提案されている。しかし、この方法では、ロックウールを固定するピンを鉄骨に溶接するために、特殊な工具が必要であり、汎用性が低い。また、現場での溶接作業が含まれるため、周囲に可燃物があると危険である。一方、ロックウールは、吸水によって性能が劣化するため、事前に工場で鉄骨にロックウールの巻き付けとピン溶接を行ってから運搬するのも困難である。 On the other hand, a method has also been proposed in which rock wool is wound around a steel frame and a pin is welded to the steel frame in that state to fix the rock wool. However, this method requires a special tool for welding the pin for fixing the rock wool to the steel frame, and has low versatility. In addition, since it involves welding work on site, it is dangerous if there are combustible materials in the surroundings. On the other hand, since the performance of rock wool deteriorates when it absorbs water, it is difficult to wrap the rock wool around the steel frame and weld the pins to the steel frame in advance before transporting the steel.

また、鉄骨の表面に下地材を接着し、ケイ酸カルシウム板を釘で固定する方法も提案されている。しかし、成形板を用いるため、取り扱い中に割れが生じるなど、施工性は必ずしも良くない。また、成形板は、鉄骨へ耐火部材を巻き付ける方法と比較して高価である。
また、鉄骨の表面に熱膨張性塗料を塗布する方法も提案されている。しかし、塗装する塗料の厚みの管理などが困難であるとともに、塗料自体が非常に高価である。このため、より安価で容易に施工が可能な方法が望まれている。 A method has also been proposed in which a base material is adhered to the surface of a steel frame and a calcium silicate plate is fixed with nails. However, since a molded plate is used, workability is not necessarily good, such as cracking during handling. In addition, the molded plate is more expensive than the method of winding the fireproof member around the steel frame.
A method of applying a thermally expansive paint to the surface of a steel frame has also been proposed. However, it is difficult to control the thickness of the paint to be applied, and the paint itself is very expensive. Therefore, there is a demand for a method that is less expensive and can be easily constructed.

本発明は、このような問題に鑑みてなされたもので、作業性が良好であり、安価に施工することが可能である耐火構造等を提供することを目的とする。 The present invention has been made in view of such problems, and an object of the present invention is to provide a fire-resistant structure or the like that has good workability and can be constructed at low cost.

本発明の一態様は、床材が取り付けられる鉄骨梁のフランジに取り付けられ、可撓性を有する耐火被覆材を固定するための固定金具であって、先端が耐火被覆材を貫通する第１突起部および第２突起部と、第１突起部の基端を立設支持する第１支持部と、第２突起部の基端を立設支持する第２支持部と、第１支持部と第２支持部との間を連結保持する連結部と、第１支持部に備えられフランジの一方面に当接する当接部と、当接部に対向して配置されてフランジの他方面へ向けて付勢するように他方面に当接する押圧部と、を有し、連結部は、第１連結部と第２連結部を備え、第1支持部と第２支持部との間隔を調整できるように、第１連結部は第２連結部に対して移動可能に保持される耐火被覆材用固定金具である。 One aspect of the present invention is a fixing fitting attached to a flange of a steel beam to which a flooring material is attached and for fixing a flexible fireproof covering material, the first protrusion having a tip end penetrating the fireproof covering material. and a second protrusion, a first support for standingly supporting the base end of the first protrusion, a second support for standingly supporting the base of the second protrusion, the first support and the second a connecting portion for connecting and holding the two support portions; a contact portion provided in the first support portion and in contact with one surface of the flange; a pressing portion that abuts on the other surface so as to be biased, and the connecting portion includes a first connecting portion and a second connecting portion, and the distance between the first supporting portion and the second supporting portion can be adjusted. In addition, the first connecting portion is a fixture for the fireproof covering that is movably held with respect to the second connecting portion.

本発明の一態様による耐火被覆材用固定金具を用いることにより、作業性が良好であり、安価に施工することが可能である耐火構造等を提供することができる。 By using the fixture for a fireproof covering material according to one aspect of the present invention, it is possible to provide a fireproof structure or the like that has good workability and that can be constructed at low cost.

第１実施形態に係る耐火構造を示す斜視図である。It is a perspective view which shows the fireproof structure which concerns on 1st Embodiment. 第１実施形態に係る耐火構造を示す断面図である。It is a sectional view showing a fireproof structure concerning a 1st embodiment. 第１実施形態に係る耐火構造の耐火被覆材が取り付く前の状態を示す斜視図である。FIG. 4 is a perspective view showing a state before the fireproof covering material of the fireproof structure according to the first embodiment is attached; 第１実施形態に係る耐火被覆材用固定金具の前方斜視図である。Fig. 2 is a front perspective view of the fixture for fireproof covering material according to the first embodiment; 第１実施形態に係る耐火被覆材用固定金具の後方斜視図である。Fig. 2 is a rear perspective view of the fixture for fireproof covering material according to the first embodiment;

以下、本発明の実施形態を、添付図面に基づいて詳細に説明する。以下の図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。ただし、図面は模式的なものであり、厚みと平面寸法との関係、各部の厚みの比率等は現実のものとは異なる。また、以下に示す実施形態は、本発明の技術的思想を具体化するための構造や方法を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造、配置等を下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each part, and the like are different from the actual ones. Further, the embodiments shown below are examples of structures and methods for embodying the technical idea of the present invention. etc. are not specified below. Various modifications can be made to the technical idea of the present invention within the technical scope defined by the claims.

図１は、本発明の第１実施形態に係る耐火構造１を示す斜視図であり、図２は、本発明の実施形態に係る耐火構造１を示す断面図である。実施形態に係る耐火構造１は、構造体としての鉄骨梁２の左右両側に耐火性能を有する床材３が水平に配置されており、左右両側に配置された床材３は鉄骨梁２に対して高さが異なるように配置され、左右の床材３の間に配置されている鉄骨梁２が耐火被覆材５によって被覆されている耐火構造であり、鉄骨梁２の上側の両側には、床材３を取り付けるためのＬアングル部材８が設けられている。 FIG. 1 is a perspective view showing a fire-resistant structure 1 according to a first embodiment of the invention, and FIG. 2 is a cross-sectional view showing a fire-resistant structure 1 according to an embodiment of the invention. In the fire-resistant structure 1 according to the embodiment, floor materials 3 having fire-resistant performance are horizontally arranged on both left and right sides of a steel beam 2 as a structural body, and the floor materials 3 arranged on both left and right sides are opposed to the steel beam 2. It is a fireproof structure in which the steel beams 2 arranged between the left and right floor materials 3 are covered with a fireproof covering material 5, and on both sides of the upper side of the steel beams 2, An L angle member 8 is provided for attaching the floor material 3 .

鉄骨梁２は本実施例では、一対のフランジ６がウェブ７によって連結された、いわゆるＨ形鋼である。なお、鉄骨梁２としては、フランジ６を有するものであれば、Ｉ形鋼、Ｌ字形鋼、山形鋼など特に限定されない。床材３は、鉄骨梁２の上側のフランジ６の上面に溶接によって取り付けられたＬアングル部材８に載置されている。床材３は発泡軽量コンクリートパネル等からなり、火災時にはそれ自体が所定の耐火性能を有する。本実施形態の納まりでは、図１、２において、鉄骨梁２の左側に配置された床材３は、鉄骨梁２の右側に配置された床材３よりも高さが低い位置に配置されている。尚、床材３は、規格により定められた複数種類の厚みを備えている。 In this embodiment, the steel beams 2 are so-called H-shaped steel in which a pair of flanges 6 are connected by webs 7 . The steel beam 2 is not particularly limited as long as it has a flange 6, such as an I-shaped steel, an L-shaped steel, or an angle steel. The floor material 3 is placed on an L-angle member 8 attached by welding to the upper surface of the upper flange 6 of the steel beam 2 . The floor material 3 is made of a foamed lightweight concrete panel or the like, and itself has a predetermined fire resistance in the event of a fire. 1 and 2, the floor material 3 arranged on the left side of the steel beam 2 is arranged at a position lower in height than the floor material 3 arranged on the right side of the steel beam 2. there is The floor material 3 has a plurality of thicknesses defined by standards.

Ｌアングル部材８は、床材３を取り付けるための長尺の部材であり、２つのＬアングル部材８を組み合わせて床材３を鉄骨梁２に固定する。Ｌアングル部材８は断面がＬ形の鋼製部材であり、２つのＬアングル部材８同士を溶接により組み合わせてＺ型状にし、一方のＬアングル部材８の平板部を鉄骨梁２のフランジ６に、ボルト固定や溶接等で固定し、他方のＬアングル部材８の平板部に床材が載置される。本実施形態では２つのＬアングル部材８同士を溶接により組み合わせて用いたが、Ｚ型鋼を用いても構わない。
鉄骨梁２の上側のフランジ６の上面であって、左右両側に配置された床材３の端面の間に形成される隙間には、モルタル１２等が充填される。 The L angle member 8 is a long member for attaching the floor material 3 , and the floor material 3 is fixed to the steel beam 2 by combining two L angle members 8 . The L-angle member 8 is a steel member having an L-shaped cross section. Two L-angle members 8 are combined by welding to form a Z-shape, and the flat plate portion of one L-angle member 8 is attached to the flange 6 of the steel beam 2. , are fixed by bolting, welding, or the like, and the floor material is placed on the flat plate portion of the other L angle member 8 . In this embodiment, two L-angle members 8 are combined by welding, but Z-shaped steel may be used.
Mortar 12 or the like is filled in the gap formed between the end faces of the floorings 3 arranged on the left and right sides on the upper surface of the flange 6 above the steel beam 2 .

本実施形態の耐火構造１は、左側の床材３と右側の床材３との間に配置される鉄骨梁２の床材３より下側に吐出する部分が可撓性を有する耐火被覆材５によって被覆されている耐火構造である。より詳しくは、鉄骨梁２の左側においては、可撓性を有する耐火被覆材５の一端側が、鉄骨梁２の下側のフランジ６における左側に取り付けられた後述する固定金具２０に固定され、鉄骨梁２の右側においては、可撓性を有する耐火被覆材５の他端側が、鉄骨梁２の下側のフランジ６における右側に取り付けられた同様の後述する固定金具２０に固定される。耐火被覆材５の一端側が固定金具２０に固定され、他端側も固定金具２０に固定されることで、左側の床材３と右側の床材３との間に配置される鉄骨梁２およびＬアングル部材８が、耐火被覆材５で覆われるため、両側の床材３の間に配置される鉄骨梁２とＬアングル部材８を、火災等による高温から保護する耐火構造を実現できる。 The fire-resistant structure 1 of the present embodiment is a fire-resistant coating material having flexibility in the portion of the steel beam 2 disposed between the left floor material 3 and the right floor material 3, which discharges downward from the floor material 3. 5 is a refractory structure covered by More specifically, on the left side of the steel beam 2, one end side of the flexible fireproof covering material 5 is fixed to a later-described fixing bracket 20 attached to the left side of the flange 6 on the lower side of the steel beam 2. On the right side of the beam 2, the other end side of the flexible fireproof covering material 5 is fixed to a similar fixing metal fitting 20 which is attached to the right side of the lower flange 6 of the steel beam 2 and will be described later. One end side of the fireproof covering material 5 is fixed to the fixing metal fitting 20, and the other end side is also fixed to the fixing metal fitting 20, so that the steel beam 2 and Since the L-angle members 8 are covered with the fire-resistant covering material 5, a fire-resistant structure can be realized that protects the steel beams 2 and the L-angle members 8 placed between the flooring materials 3 on both sides from high temperatures caused by fire or the like.

耐火被覆材５は、例えば熱膨張材が含まれるシート状の部材であることが望ましい。なお、耐火被覆材５は、取り扱い性を考慮すると、ロックウールなどの無機繊維を主成分とするものではなく、樹脂をベース材とするものが望ましい。すなわち、耐火被覆材５は、ベース材である樹脂に熱膨張材が含まれて構成されていることが望ましい。なお、樹脂としては、特に限定されないが、例えば、熱可塑性樹脂、熱硬化性樹脂、ゴム、エラストマー等を適用可能である。また、樹脂に含有させる熱膨張材としては、特に限定されないが、例えば、層状無機物、リン化合物が挙げられる。層状無機物としては、バーミキュライト、カリオン、マイカ、熱膨張性黒鉛などが挙げられ、特に熱膨張性黒鉛が好ましい。さらに、ガラスフリットや無機フィラー等を樹脂に配合してもよい。また、耐火被覆材５は、発泡体であってもよく、非発泡体であってもよい。 The fireproof covering material 5 is desirably a sheet-shaped member containing, for example, a thermal expansion material. Considering ease of handling, the fireproof covering material 5 is desirably made of a resin as a base material instead of an inorganic fiber such as rock wool as a main component. That is, it is desirable that the fireproof coating material 5 is configured by including a thermal expansion material in a resin that is a base material. Although the resin is not particularly limited, for example, thermoplastic resin, thermosetting resin, rubber, elastomer, etc. can be applied. Moreover, the thermal expansion material to be contained in the resin is not particularly limited, but examples thereof include layered inorganic substances and phosphorus compounds. Examples of the layered inorganic material include vermiculite, carion, mica, and thermally expandable graphite, with thermally expandable graphite being particularly preferred. Further, a glass frit, an inorganic filler, or the like may be added to the resin. Moreover, the fireproof covering material 5 may be a foam or a non-foam.

また、耐火被覆材５に、他の部材を組み合わせてもよい。他の部材としては、本実施形態の効果を損なわない限り特に限定されないが、耐熱性及び／又は難燃性を示す部材が好ましい。耐火被覆材５と他の部材とを組み合わせた複合体の例としては、耐火被覆材５と不燃シートとを貼合したものが挙げられ、不燃シートとしては、金属シートと無機繊維シートが挙げられる。金属シートとしては、ステンレス、アルミニウム、鉄などからなる金属シートを用いることができる。このように金属シートとの複合体とすることにより、耐火性能をより向上することができる。また他に、耐火被覆材５と無機繊維シートとの複合材も挙げられる。無機繊維シートとしては、例えば、ガラス繊維、セルロース繊維、セラミックウール繊維、ロックウール繊維等からなるシート、不織布、織布などが挙げられる。不織布、織布は、薄いアルミニウム層が積層されたものであってもよい。このような不燃シートは一種もしくは二種以上を使用することができる。 Also, the fireproof covering material 5 may be combined with other members. Other members are not particularly limited as long as they do not impair the effects of the present embodiment, but members exhibiting heat resistance and/or flame resistance are preferable. Examples of composites in which the fireproof coating material 5 and other members are combined include those obtained by laminating the fireproof coating material 5 and a noncombustible sheet, and examples of the noncombustible sheet include a metal sheet and an inorganic fiber sheet. . As the metal sheet, a metal sheet made of stainless steel, aluminum, iron, or the like can be used. By forming a composite with a metal sheet in this way, the fire resistance can be further improved. In addition, a composite material of the fireproof covering material 5 and an inorganic fiber sheet can also be used. Examples of inorganic fiber sheets include sheets made of glass fibers, cellulose fibers, ceramic wool fibers, rock wool fibers, etc., nonwoven fabrics, and woven fabrics. Non-woven fabrics and woven fabrics may be laminated with a thin aluminum layer. One or two or more of such incombustible sheets can be used.

図３は、実施形態に係る耐火構造１の耐火被覆材５が取り付く前の状態を示す斜視図である。耐火被覆材５の一端側を固定するための固定金具２０は、下側のフランジ６の左側に取り付けられ、耐火被覆材５の他端側を固定するための固定金具２０は、下側のフランジ６の右側に取り付けられる。本実施形態においては、下側のフランジ６に対して左側の床材３の下面の高さと右側の床材３の下面の高さとは異なるが、固定金具２０は、下側のフランジ６に対して床材３の下面の高さが異なる場合であっても、調整することで対応することが出来る固定金具である。 FIG. 3 is a perspective view showing a state before the fireproof covering material 5 is attached to the fireproof structure 1 according to the embodiment. A fixing bracket 20 for fixing one end side of the fireproof covering material 5 is attached to the left side of the lower flange 6, and a fixing bracket 20 for fixing the other end side of the fireproof covering material 5 is attached to the lower flange. It is installed on the right side of 6. In this embodiment, the height of the lower surface of the left floor material 3 and the height of the lower surface of the right floor material 3 with respect to the lower flange 6 are different. Even if the height of the lower surface of the floor material 3 is different, the fixing metal fitting can be adjusted by adjusting it.

次に、図４Ａ、図４Ｂを用いて、耐火被覆材用の固定金具２０について説明する。図４Ａは固定金具２０を前方から見た斜視図であり、図４Ｂは、固定金具２０を後方から見た斜視図である。固定金具２０は、先端が耐火被覆材５を貫通する第１突起部２１及び第２突起部２２と、第１突起部２１の基端を立設支持する平板状の第１支持部２４と、第２突起部２２の基端を立設支持する平板状の第２支持部２５と、第１支持部２４と第２支持部２５との間を連結保持する連結部２６とを備えている。第１突起部２１及び第２突起部２２には雄ねじ２３が形成されており、第１突起部２１及び第２突起部２２に貫通された耐火被覆材５をナット４０により固定することができるようになっている。固定金具２０が鉄骨梁２の下側のフランジ６に取り付けられた状態で、第１支持部２４は、第１突起部２１が立設する面と反対側の面がフランジ６の一方面である下面に当接する当接部２７としての機能を備えている。 Next, the fixture 20 for the fireproof coating will be described with reference to FIGS. 4A and 4B. FIG. 4A is a perspective view of the fixture 20 as seen from the front, and FIG. 4B is a perspective view of the fixture 20 as seen from the rear. The fixing bracket 20 includes a first projection 21 and a second projection 22 whose tip penetrates the fireproof covering material 5, a flat plate-like first support 24 that supports the base end of the first projection 21, A flat plate-shaped second support portion 25 for standingly supporting the base end of the second projection portion 22 and a connection portion 26 for connecting and holding the first support portion 24 and the second support portion 25 are provided. A male screw 23 is formed on the first protrusion 21 and the second protrusion 22 so that the fireproof covering material 5 penetrated by the first protrusion 21 and the second protrusion 22 can be fixed by a nut 40. It has become. In the state where the fixing bracket 20 is attached to the lower flange 6 of the steel beam 2, the surface of the first support portion 24 opposite to the surface on which the first projecting portion 21 stands is one surface of the flange 6. It has a function as a contact portion 27 that contacts the lower surface.

連結部２６は、第１支持部２４の一端から直角に第１突起部２１が立設する方向と反対側の方向に起立する第１連結部３３と、第２支持部２５の一端から第２突起部２２が立設する方向に斜めに屈曲する第２連結部３４とを有する。第１連結部３３には第２連結部３４を締結手段としてのリベット３７により取り付けるための取付孔３５が５か所設けられている。第２連結部３４は、その先端側が第２支持部２５の方向側に斜めに屈曲してリベット３７によって第１連結部に取り付けるための連結取付部３６を有している。連結取付部３６にはリベット３７を通すための図示されない孔が２か所設けられており、第１連結部３３に設けられた取付孔３５のピッチと連結取付部３６に設けられた孔のピッチが同じになっている孔に取り付けられるようになっている。尚、本実施形態では、取付孔３５が５か所設けられているが、第２連結部３４の第１連結部３３に対する取付位置を変更できるのであれば、取付孔３５は５か所でなくても構わない。第１支持部２４と第１連結部３３は一体に形成され、第２支持部２５と第２連結部３４は一体に形成されている。第１連結部３３は補強のために補強リブ３８を有し、第２連結部３４は補強のために補強ビード３９を有している。尚、本実施形態では、第１連結部３３は補強リブ３８を有し、第２連結部３４は補強ビード３９を有しているが、補強リブ３８または補強ビード３９のどちらであっても構わない。また、第１支持部２４または第２支持部２５のいずれかに、補強リブ３８または補強ビード３９のいずれかが設けられていても構わない。 The connecting portion 26 includes a first connecting portion 33 standing perpendicularly from one end of the first supporting portion 24 in a direction opposite to the direction in which the first projecting portion 21 is erected, and a second supporting portion 25 extending from one end of the second supporting portion 25 to a second connecting portion 33 . It has a second connecting portion 34 obliquely bent in the direction in which the projecting portion 22 is erected. The first connecting portion 33 is provided with five mounting holes 35 for mounting the second connecting portion 34 with rivets 37 as fastening means. The second connecting portion 34 has a connecting attachment portion 36 that is obliquely bent toward the direction of the second supporting portion 25 at its distal end side and attached to the first connecting portion with a rivet 37 . The connecting mounting portion 36 has two holes (not shown) through which the rivets 37 are passed. are adapted to be mounted in identical holes. In this embodiment, five mounting holes 35 are provided. I don't mind. The first supporting portion 24 and the first connecting portion 33 are integrally formed, and the second supporting portion 25 and the second connecting portion 34 are integrally formed. The first connecting portion 33 has reinforcing ribs 38 for reinforcement, and the second connecting portion 34 has reinforcing beads 39 for reinforcement. In this embodiment, the first connecting portion 33 has the reinforcing rib 38 and the second connecting portion 34 has the reinforcing bead 39, but either the reinforcing rib 38 or the reinforcing bead 39 may be used. do not have. Further, either the reinforcing rib 38 or the reinforcing bead 39 may be provided on either the first supporting portion 24 or the second supporting portion 25 .

第１連結部３３の第１支持部２４が起立する側の面に、当接部２７に対向して配置される押圧部２８がリベット３７により取り付けられる。押圧部２８は、第１連結部３３に取り付く固定部３２と、固定部３２の一端から固定部３２に対して直角に接続して当接部２７と平行に配置する支持板部２９と、支持板部２９の先端に接続して当接部２７側に湾曲するＵ字状の弾性を備えたバネ部３０と、バネ部３０の先端に接続し先端が第１支持部２４の一端側に向かって斜めに伸びる平板状の押さえ板部３１を有している。固定金具２０を鉄骨梁２の下側のフランジ６に取り付けた場合に、当接部２７に対向して配置される押圧部２８の押さえ板部３１が、フランジ６の他方面へ向けて付勢してフランジ６の他方面に当接する。本実施形態では、押圧部２８の固定部３２、支持板部２９、バネ部３０、押さえ板部３１は一体に形成されている。尚、固定部３２と第１連結部３３との固定は、他の締結手段、例えば、ネジや溶接により固定されても構わない。押さえ板部３１の先端は、押さえ板部３１の先端と当接部２７との間にクリアランスが生じるような位置に配置され、押さえ板部３１の先端と当接部２７との間のクリアランスは鉄骨梁２のフランジ６の板厚よりも小さい寸法となっている。また、押さえ板部３１の先端は波状に形成されている。尚、押さえ板部３１の先端は必ずしも波状に形成されていなくても構わないが、波状に形成されていることが望ましい。波状に形成されていることにより、固定金具２０を鉄骨梁２の下側のフランジ６に取り付けた場合に、押さえ板部３１の先端の波状部分がフランジ６の表面に食い込み、固定金具２０が鉄骨梁２から外れにくくなるためである。 A pressing portion 28 arranged to face the contact portion 27 is attached by a rivet 37 to the surface of the first connecting portion 33 on which the first support portion 24 stands. The pressing portion 28 includes a fixing portion 32 attached to the first connecting portion 33, a support plate portion 29 connected from one end of the fixing portion 32 to the fixing portion 32 at a right angle and arranged parallel to the contact portion 27, and a support plate portion 29. A U-shaped elastic spring portion 30 connected to the tip of the plate portion 29 and curved toward the contact portion 27 side, and It has a flat pressing plate portion 31 extending obliquely from the bottom. When the fixing bracket 20 is attached to the lower flange 6 of the steel beam 2, the pressing plate portion 31 of the pressing portion 28 arranged to face the contact portion 27 is biased toward the other side of the flange 6. Then, it abuts on the other side of the flange 6 . In this embodiment, the fixing portion 32 of the pressing portion 28, the support plate portion 29, the spring portion 30, and the pressing plate portion 31 are integrally formed. The fixing portion 32 and the first connecting portion 33 may be fixed by other fastening means such as screws or welding. The tip of the pressing plate portion 31 is arranged at a position such that a clearance is generated between the tip of the pressing plate portion 31 and the contact portion 27, and the clearance between the tip of the pressing plate portion 31 and the contact portion 27 is The dimension is smaller than the plate thickness of the flange 6 of the steel beam 2 . Further, the tip of the pressing plate portion 31 is formed in a wavy shape. Note that the tip of the pressing plate portion 31 does not necessarily have to be wavy, but is preferably wavy. Due to the wavy shape, when the fixing bracket 20 is attached to the lower flange 6 of the steel beam 2, the wavy portion at the tip of the pressing plate portion 31 bites into the surface of the flange 6, and the fixing bracket 20 is attached to the steel frame. This is because it becomes difficult to separate from the beam 2 .

連結部２６は、第１支持部２４の第１突起部２１と第２支持部２５の第２突起部２２が同じ方向を向くように、第１支持部２４と第２支持部２５との間を連結する。また、固定金具２０が鉄骨梁２の下側のフランジ６に取り付けられた状態で、第２支持部２５はＬアングル部材８に干渉することなく、第１支持部材２４よりも床材３側に配置して床材３の下側面に当接する。また、第１支持部２４と第２支持部２５とが平行に配置されるように、連結部２６の第２連結部３４は曲折している。連結部２６は第１連結部３３と第２連結部３４を備え、第２連結部３４は第１連結部３３に設けられた複数の取付孔３５のうちの任意の取付孔３５にリベット３７により保持することが可能であるため、第１支持部２４と第２支持部２５の相対的位置を変更することができる。すなわち、第１連結部３３は第２連結部３４に対して移動可能に保持される。そのため、異なる厚さの床材３に対して、あるいは、床材３の下面の位置が鉄骨梁２の下側のフランジ６に対して高さ方向で異なる納まりがある場合でも、複数種類の固定金具を用意する必要が無く、１種類の固定金具２０のみで対応することができる。 The connection portion 26 is provided between the first support portion 24 and the second support portion 25 so that the first projection portion 21 of the first support portion 24 and the second projection portion 22 of the second support portion 25 face the same direction. concatenate In addition, in a state where the fixing bracket 20 is attached to the lower flange 6 of the steel frame beam 2, the second support part 25 does not interfere with the L angle member 8, and is positioned closer to the floor material 3 than the first support member 24. It is arranged and abuts against the lower surface of the floor material 3 . Further, the second connecting portion 34 of the connecting portion 26 is bent so that the first supporting portion 24 and the second supporting portion 25 are arranged in parallel. The connecting portion 26 includes a first connecting portion 33 and a second connecting portion 34 , and the second connecting portion 34 is attached to an arbitrary mounting hole 35 out of a plurality of mounting holes 35 provided in the first connecting portion 33 by a rivet 37 . Since it can be held, the relative positions of the first support portion 24 and the second support portion 25 can be changed. That is, the first connecting portion 33 is held movably with respect to the second connecting portion 34 . Therefore, even if the floor material 3 has a different thickness, or if the position of the lower surface of the floor material 3 differs in the height direction with respect to the lower flange 6 of the steel beam 2, a plurality of types of fixing are possible. There is no need to prepare metal fittings, and only one kind of fixing metal fittings 20 can be used.

固定金具２０の材質としては、耐火構造１に用いる金具であるため、火災等による高温の雰囲気下でも容易に変形しない材質であることが望ましい。そのため、例えば、鉄板や亜鉛メッキ鋼板やステンレス鋼板などを適用可能である。押圧部２８については、バネ部３０のばね性を考慮すると、特に、ばね用ステンレス鋼板が適している。 As the material of the fixing metal fittings 20, since the metal fittings are used for the fire-resistant structure 1, it is desirable to use a material that does not easily deform even in a high-temperature atmosphere caused by a fire or the like. Therefore, for example, an iron plate, a galvanized steel plate, a stainless steel plate, etc. are applicable. Considering the springiness of the spring portion 30 , a spring stainless steel plate is particularly suitable for the pressing portion 28 .

次に、図３を用いて固定金具２０の鉄骨梁２の下側のフランジ６への取り付けについて説明する。固定金具２０は、鉄骨梁２の下側のフランジ６に取り付けられる。押さえ板部３１の先端と当接部２７との間のクリアランスにフランジ６の先端が挿入されるように、固定金具２０をフランジ６に押し込むことによって、固定金具２０は鉄骨梁２に取り付けられる。押さえ板部３１の先端と当接部２７との間のクリアランスは鉄骨梁２の下側のフランジ６の板厚よりも小さい寸法となっており、バネ部３０は弾性を有していることから、バネ部３０の付勢力により、当接部２７と押さえ板部３１はフランジ６を挟むことで保持する。また、押さえ板部３１は、先端が第１支持部２４の一端側、すなわち、第１支持部２４と第１連結部３３との接続部位に向かって斜めに伸びるため、固定金具２０がフランジ６から抜く方向に移動しようとすると、押さえ板部３１の先端がフランジ６に食い込む方向に作用するため、固定金具２０がフランジ６から外れることを防止することができる。また、押さえ板部３１の先端は波状に形成されているため、さらに、固定金具２０がフランジ６から外れにくくなっている。 Next, attachment of the fixture 20 to the lower flange 6 of the steel beam 2 will be described with reference to FIG. The fixing bracket 20 is attached to the lower flange 6 of the steel beam 2 . The fixing bracket 20 is attached to the steel frame beam 2 by pushing the fixing bracket 20 into the flange 6 so that the tip of the flange 6 is inserted into the clearance between the tip of the pressing plate portion 31 and the contact portion 27 . The clearance between the tip of the pressing plate portion 31 and the contact portion 27 is smaller than the plate thickness of the flange 6 on the lower side of the steel beam 2, and the spring portion 30 has elasticity. By the biasing force of the spring portion 30, the contact portion 27 and the pressing plate portion 31 hold the flange 6 therebetween. Further, the tip of the pressing plate portion 31 obliquely extends toward one end side of the first support portion 24 , that is, toward the connecting portion between the first support portion 24 and the first connecting portion 33 , so that the fixing metal fitting 20 is attached to the flange 6 . When trying to move in the direction of pulling out from the fixing member 20, the tip of the pressing plate portion 31 acts in the direction of biting into the flange 6, so that the fixing member 20 can be prevented from coming off the flange 6.例文帳に追加In addition, since the tip of the pressing plate portion 31 is formed in a wavy shape, the fixing metal fitting 20 is more difficult to come off from the flange 6 .

固定金具２０が鉄骨梁２の下側のフランジ６に取り付けられた状態で、第２支持部２５が、Ｌアングル部材８に干渉しない位置であって、かつ、第１支持部材２４よりも床材３側に配置して床材３の下面に当接するように、連結部２６は曲折して第１支持部２４と第２支持部２５を接続しているので、第２支持部２５に立設支持する第２突起部２２に耐火被覆材５が固定された場合に、耐火被覆材５が外壁材４から浮き上がることを防止することができる。
固定金具２０の第１連結部３３に補強リブ３８が設けられ、第２連結部３４に補強ビード３９が設けられているため、耐火被覆材５の重み等による第１連結部３３、第２連結部３４の撓みを抑制することができる。 In a state where the fixing bracket 20 is attached to the lower flange 6 of the steel beam 2, the second support portion 25 is positioned so as not to interfere with the L angle member 8, and is positioned closer to the floor material than the first support member 24. The connecting portion 26 is bent to connect the first supporting portion 24 and the second supporting portion 25 so as to be arranged on the side 3 and abut on the lower surface of the flooring 3, so that the second supporting portion 25 is erected. When the fireproof covering material 5 is fixed to the supporting second protrusions 22 , it is possible to prevent the fireproof covering material 5 from rising from the outer wall material 4 .
Since the first connecting portion 33 of the fixing bracket 20 is provided with the reinforcing rib 38 and the second connecting portion 34 is provided with the reinforcing bead 39, the first connecting portion 33 and the second connecting portion 33 and the second connection due to the weight of the refractory covering material 5 or the like are prevented. Deflection of the portion 34 can be suppressed.

次に、図１、２、３を用いて、固定金具２０を用いて耐火被覆材５が鉄骨梁２を覆う耐火構造１について具体的に説明する。
本実施形態の耐火構造１は、左側の床材３と右側の床材３との間に配置される鉄骨梁２の床材３より下側に突出する部分が耐火被覆材５によって被覆されている耐火構造である。固定金具２０が鉄骨梁２の下側のフランジ６の左右両端に取り付けられる。鉄骨梁２の左側においては、固定金具２０が鉄骨梁２の下側のフランジ６に取り付けられた状態で、第２支持部２５が、Ｌアングル部材８に干渉しない位置であって、かつ、左側の床材３の下面に当接する。鉄骨梁２の右側においても、固定金具２０が鉄骨梁２の下側のフランジ６に取り付けられた状態で、第２支持部２５が、Ｌアングル部材８に干渉しない位置であって、かつ、右側の床材３の下面に当接する。 Next, the fire-resistant structure 1 in which the steel frame beam 2 is covered with the fire-resistant covering material 5 using the fixtures 20 will be specifically described with reference to FIGS.
In the fireproof structure 1 of the present embodiment, the portion of the steel beam 2 that protrudes downward from the flooring 3 disposed between the flooring 3 on the left side and the flooring 3 on the right side is covered with a fireproof covering material 5. It is a fire-resistant structure. Fixing metal fittings 20 are attached to the left and right ends of the lower flange 6 of the steel beam 2 . On the left side of the steel beam 2, with the fixing bracket 20 attached to the lower flange 6 of the steel beam 2, the second support portion 25 does not interfere with the L angle member 8, and the left side abuts on the lower surface of the floor material 3. Also on the right side of the steel beam 2, in a state where the fixing bracket 20 is attached to the lower flange 6 of the steel beam 2, the second support portion 25 is positioned so as not to interfere with the L angle member 8, and on the right side. abuts on the lower surface of the floor material 3.

鉄骨梁２の左側においては、耐火被覆材５の一端側をフランジ６の左側に取り付けられた固定金具２０の第２支持部２５に立設する第２突起部２２に貫通させ、雄ねじ２３が形成された第２突起部２２にナット４０を締結することで、耐火被覆材５の一端側は固定金具２０に固定される。同様に、鉄骨梁２の左側においては、耐火被覆材５の他端側をフランジ６の右側に取り付けられた固定金具２０の第２支持部２５に立設する第２突起部２２に貫通させ、雄ねじ２３が形成された第２突起部２２にナット４０を締結することで、耐火被覆材５の他端側は固定金具２０に固定される。耐火被覆材５の中間部分は、フランジ６の左右両側に取り付けられた固定金具２０の第１支持部２４に立設する第１突起部２１に貫通させ、雄ねじ２３が形成された第１突起部２１にナット４０を締結することで、固定金具２０に固定される。 On the left side of the steel frame beam 2, one end side of the fireproof covering material 5 is penetrated by a second projecting portion 22 erected on a second support portion 25 of a fixing metal fitting 20 attached to the left side of the flange 6, and a male screw 23 is formed. By fastening a nut 40 to the second projecting portion 22 thus formed, one end side of the fireproof covering material 5 is fixed to the fixture 20 . Similarly, on the left side of the steel beam 2, the other end side of the fireproof covering material 5 is penetrated by the second protrusion 22 erected on the second support portion 25 of the fixing bracket 20 attached to the right side of the flange 6, By fastening a nut 40 to the second projecting portion 22 having the male thread 23 , the other end side of the fireproof covering material 5 is fixed to the fixture 20 . The intermediate portion of the fireproof coating material 5 is penetrated by the first protrusions 21 erected on the first support portions 24 of the fixing metal fittings 20 attached to the left and right sides of the flange 6, and the first protrusions 23 are formed with male threads 23. By fastening a nut 40 to 21 , it is fixed to the fixture 20 .

本実施形態の耐火構造１によれば、耐火被覆材５の一端側が左側の固定金具２０の第２突起部２２に取り付けられ、他端側が右側の固定金具２０の第２突起部２２に取り付けられ、耐火被覆材５の中間は左右両側の固定金具２０の第１突起部２１に取り付けられることで、左側の床材３と右側の床材３との間に配置される鉄骨梁２およびＬアングル部材８が、耐火被覆材５で覆われる。また、固定金具２０を当接部２７と押圧部２８とによって鉄骨梁２の下側のフランジ６に固定するため、溶接も不要であり、容易に固定金具２０を鉄骨梁２の下側のフランジ６に取り付けることができる。 According to the fireproof structure 1 of this embodiment, one end side of the fireproof covering material 5 is attached to the second protrusion 22 of the left fixing bracket 20, and the other end side is attached to the second protrusion 22 of the right fixing bracket 20. , the middle of the fireproof coating material 5 is attached to the first protrusions 21 of the fixing brackets 20 on both the left and right sides, so that the steel beam 2 and the L angle placed between the left floor material 3 and the right floor material 3 A member 8 is covered with a refractory coating 5 . In addition, since the fixing metal fitting 20 is fixed to the lower flange 6 of the steel beam 2 by the abutting portion 27 and the pressing portion 28, welding is not necessary, and the fixing metal fitting 20 can be easily attached to the lower flange of the steel beam 2. 6 can be installed.

また、第１突起部２１および第２突起部２２に雄ねじ２３が形成されているため、ナット４０によって、確実に耐火被覆材５の脱落を抑制することができる。また、耐火被覆材５は熱膨張材が含まれた樹脂製であるため、作業環境の悪化を抑制し、軽量であるため作業も容易である。また、ベース材として樹脂を適用することで、従来の無機繊維を主成分とするロックウール等と比較して、耐水性に優れ、運搬時の劣化等を抑制可能であるため、運搬作業も容易である。従って、本実施形態の耐火構造１では、左側の床材３と右側の床材３との間に配置される鉄骨梁２およびＬアングル部材８が、左側の床材３から右側の床材３にかけて、耐火被覆材５で覆われるため、鉄骨梁２とＬアングル部材８を、火災等による高温から保護する耐火構造を実現できると共に、作業性が良好であり、安価に施工することが可能である耐火構造を提供することができる。 In addition, since the male threads 23 are formed on the first projecting portion 21 and the second projecting portion 22, the nut 40 can reliably prevent the fireproof coating 5 from coming off. In addition, since the fireproof coating material 5 is made of resin containing a thermally expansible material, deterioration of the work environment is suppressed, and work is easy due to its light weight. In addition, by using resin as the base material, compared to conventional rock wool, which is mainly composed of inorganic fibers, it has excellent water resistance and can suppress deterioration during transportation, making transportation work easier. is. Therefore, in the fire-resistant structure 1 of the present embodiment, the steel beams 2 and the L angle members 8 arranged between the left floor material 3 and the right floor material 3 are arranged from the left floor material 3 to the right floor material 3 Since it is covered with the fireproof covering material 5, it is possible to realize a fireproof structure that protects the steel beam 2 and the L angle member 8 from high temperatures caused by fire, etc., and has good workability and can be constructed at a low cost. Some fire resistant construction can be provided.

なお、ナット４０として、いわゆる丸形スピードナット（Ｒｏｕｎｄ Ｔｙｐｅ Ｓｐｅｅｄ Ｎｕｔ）と呼ばれるものを使用すれば、雄ねじ２３への差し込みのみで容易に固定が可能となり、より好ましい。
また、鉄骨梁２を耐火被覆材５で被覆した例を説明したが、柱に対しても適用可能である。また、第１突起部２１および第２突起部２２に雄ねじ２３が形成されていなくてもよく、例えば、針金状の突起であってもよい。この場合には、耐火被覆材５に第１突起部２１および第２突起部２２を突き刺して、その後先端を屈曲させることで、耐火被覆材５の脱落を抑制することができる。 It should be noted that if a so-called round type speed nut is used as the nut 40, it can be easily fixed by simply inserting it into the male screw 23, which is more preferable.
In addition, although the example in which the steel frame beam 2 is covered with the fireproof covering material 5 has been described, it can also be applied to columns. Also, the male thread 23 may not be formed on the first protrusion 21 and the second protrusion 22, and may be wire-like protrusions, for example. In this case, by piercing the first protrusion 21 and the second protrusion 22 into the fireproof covering material 5 and then bending the tips thereof, it is possible to prevent the fireproof covering material 5 from coming off.

次に、固定金具２０を用いて耐火被覆材５が鉄骨梁２を覆う耐火構造１の施工方法について具体的に説明する。
鉄骨梁２の下側のフランジ６における左側に固定金具２０を取り付け、鉄骨梁２の下側のフランジ６における右側に固定金具２０を取り付ける。固定金具２０のフランジ６への取り付けは、固定金具２０の押さえ板部３１の先端と当接部２７との間のクリアランスにフランジ６の先端を挿入し、固定金具２０をフランジ６に押し込んで行う。次に、耐火被覆材５の一端側を固定金具２０の第２突起部２２に貫通させて、雄ねじ２３が形成された第２突起部２２にナット４０を締結し、耐火被覆材５の一端側を固定金具２０に固定する。次に、耐火被覆材５の他端側を固定金具２０の第２突起部２２に貫通させて、雄ねじ２３が形成された第２突起部２２にナット４０を締結し、耐火被覆材５の他端側を固定金具２０に固定する。次に、耐火被覆材５の中間部分を、フランジ６の左右両側に取り付けられた固定金具２０の第１突起部２１に貫通させ、雄ねじ２３が形成された第１突起部２１にナット４０を締結し、耐火被覆材５の中間部分を固定金具２０に固定して、鉄骨梁２およびＬアングル部材８を耐火被覆材５によって被覆する。
耐火被覆材５の一端側、中間部、他端側を固定金具２０に固定されることで、作業性が良好であり、安価に施工することが可能である。 Next, a method for constructing the fire-resistant structure 1 in which the fire-resistant covering material 5 covers the steel frame beam 2 using the fixtures 20 will be specifically described.
A fixing bracket 20 is attached to the left side of the lower flange 6 of the steel beam 2 , and a fixing bracket 20 is attached to the right side of the lower flange 6 of the steel beam 2 . The fixing metal fitting 20 is attached to the flange 6 by inserting the tip of the flange 6 into the clearance between the tip of the pressing plate portion 31 of the fixing metal fitting 20 and the contact portion 27 and pushing the fixing metal fitting 20 into the flange 6. . Next, one end side of the fireproof coating material 5 is passed through the second protrusion 22 of the fixture 20, and a nut 40 is fastened to the second protrusion part 22 having the male screw 23 formed thereon. is fixed to the fixture 20. Next, the other end of the refractory covering material 5 is passed through the second protrusion 22 of the fixture 20, the nut 40 is fastened to the second protrusion 22 having the male thread 23, and the other end of the refractory covering material 5 is The end side is fixed to the fixture 20 . Next, the intermediate portion of the fireproof coating material 5 is passed through the first protrusions 21 of the fixing metal fittings 20 attached to the left and right sides of the flange 6, and the nuts 40 are fastened to the first protrusions 21 having male threads 23 formed thereon. Then, the intermediate portion of the fireproof covering material 5 is fixed to the fixing bracket 20 to cover the steel frame beam 2 and the L angle member 8 with the fireproof covering material 5 .
By fixing the one end side, the middle part, and the other end side of the fireproof covering material 5 to the fixing metal fittings 20, workability is good and construction can be performed at a low cost.

以上、限られた数の実施形態を参照しながら説明したが、権利範囲はそれらに限定されるものではなく、上記の開示に基づく実施形態の改変は、当業者にとって自明のことである。 Although the foregoing has been described with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art.

１…耐火構造、２…鉄骨梁、３…床材、４…外壁材、５…耐火被覆材、６…フランジ、７…ウェブ、８…Ｌアングル部材、１２…モルタル、２０…固定金具、２１…第１突起部、２２…第２突起部、２３…雄ねじ、２４…第１支持部、２５…第２支持部、２６…連結部、２７…当接部、２８…押圧部、２９…支持板部、３０…バネ部、３１…押さえ板部、３２…固定部、３３…第１連結部、３４…第２連結部、３５…取付孔、３６…連結取付部、３７…リベット、３８…補強リブ、３９…補強ビード、４０…ナット REFERENCE SIGNS LIST 1 fireproof structure 2 steel beam 3 floor material 4 outer wall material 5 fireproof coating material 6 flange 7 web 8 L angle member 12 mortar 20 fixing bracket 21 1st projecting portion 22 2nd projecting portion 23 male screw 24 first support portion 25 second support portion 26 connection portion 27 contact portion 28 pressing portion 29 support Plate portion 30 Spring portion 31 Holding plate portion 32 Fixing portion 33 First connection portion 34 Second connection portion 35 Mounting hole 36 Connection mounting portion 37 Rivet 38 Reinforcement rib, 39... Reinforcement bead, 40... Nut

Claims (12)

床材が取り付けられる鉄骨梁のフランジに取り付けられ、可撓性を有する耐火被覆材を固定するための固定金具であって、
先端が前記耐火被覆材を貫通する第１突起部および第２突起部と、
前記第１突起部の基端を立設支持する第１支持部と、
前記第２突起部の基端を立設支持する第２支持部と、
前記第１支持部と前記第２支持部との間を連結保持する連結部と、
前記第１支持部に備えられ前記フランジの一方面に当接する当接部と、
前記当接部に対向して配置されて前記フランジの他方面へ向けて付勢するように当該他方面に当接する押圧部と、を有し、
前記連結部は、第１連結部と第２連結部を備え、前記第1支持部と前記第２支持部との間隔を調整できるように、前記第１連結部は前記第２連結部に対して移動可能に保持されることを特徴とする耐火被覆材用固定金具。 A fixing fitting for fixing a flexible fireproof covering material attached to a flange of a steel beam to which a flooring material is attached,
a first protrusion and a second protrusion whose tips penetrate the fireproof covering;
a first support portion for standingly supporting the base end of the first protrusion;
a second support portion for standingly supporting the base end of the second protrusion;
a connection portion that connects and holds the first support portion and the second support portion;
a contact portion provided on the first support portion and contacting one surface of the flange;
a pressing portion disposed opposite the contact portion and in contact with the other surface of the flange so as to bias the flange toward the other surface;
The connecting part includes a first connecting part and a second connecting part, and the first connecting part is arranged relative to the second connecting part so as to adjust the distance between the first supporting part and the second supporting part. A fixture for a fireproof covering, characterized in that it is movably held by a 前記第１突起部の先端と第２突起部の先端とが同じ方向に向いていることを特徴とする請求項１に記載の耐火被覆材用固定金具。 2. The fixture for a fireproof covering material according to claim 1, wherein the tip of the first protrusion and the tip of the second protrusion are oriented in the same direction. 前記第１支持部、前記第２支持部、または前記連結部のいずれかには、補強リブまたは補強ビードの少なくとも一方が形成されていることを特徴とする請求項１または２に記載の耐火被覆材用固定金具。 3. The fireproof coating according to claim 1, wherein at least one of a reinforcing rib and a reinforcing bead is formed on any one of the first supporting portion, the second supporting portion, and the connecting portion. Fixtures for lumber. 前記固定金具が前記鉄骨梁の前記フランジに取り付けられた状態で、前記第２支持部は前記第１支持部よりも前記床材側に配置して前記床材に当接していることを特徴とする請求項１から３のいずれか１項に記載の耐火被覆材用固定金具。 In a state where the fixing bracket is attached to the flange of the steel beam, the second support portion is arranged closer to the floor material than the first support portion and is in contact with the floor material. The fixture for a fireproof covering material according to any one of claims 1 to 3. 前記固定金具が前記鉄骨梁の前記フランジに取り付けられた状態で、前記第２支持部は前記第１支持部よりも前記床材側に配置して前記床材に当接するように前記連結部が曲折していることを特徴とする請求項４に記載の耐火被覆材用固定金具。 In a state in which the fixing bracket is attached to the flange of the steel frame beam, the connecting portion is arranged such that the second support portion is arranged closer to the floor material than the first support portion and abuts against the floor material. 5. The fixture for fireproof covering material according to claim 4, characterized in that it is bent. 前記第１突起部及び前記第２突起部には雄ねじが形成されていることを特徴とする請求項１から５のいずれか１項に記載の耐火被覆材用固定金具。 6. The fixture for fireproof covering material according to claim 1, wherein male threads are formed on said first protrusion and said second protrusion. 床材が取り付けられる鉄骨梁の、前記床材より突出する側が可撓性を有する耐火被覆材によって被覆され、前記鉄骨梁に取り付けられると共に一部が前記床材に当接する固定金具に前記耐火被覆材が固定される耐火構造において、
前記固定金具は請求項１から６のいずれか１項に記載の耐火被覆材用固定金具であって、前記第２支持部が前記床材に当接し、
前記第１突起部及び第２突起部が、前記耐火被覆材に貫通することで、前記耐火被覆材が前記固定金具に固定されることを特徴とする耐火構造。 A steel beam to which a floor material is attached is coated with a flexible fireproof covering material on the side protruding from the floor material, and the fireproof covering is applied to a fixing bracket attached to the steel beam and partly in contact with the floor material. In fire-resistant structures where materials are fixed,
The fixing metal fitting is the fixing metal fitting for a fireproof covering material according to any one of claims 1 to 6, wherein the second support portion abuts on the floor material,
A fire-resistant structure, wherein the fire-resistant covering material is fixed to the fixture by the first projecting portion and the second projecting portion penetrating the fire-resistant covering material. 前記請求項７に記載された耐火構造において、前記固定金具は請求項６に記載された耐火被覆材用固定金具であって、
前記雄ねじを前記耐火被覆材に貫通させ、ナットを前記雄ねじに締結することにより、前記耐火被覆材が前記固定金具に固定されることを特徴とする耐火構造。 In the fire resistant structure described in claim 7, the fixture is the fixture for fireproof covering material described in claim 6,
A fire-resistant structure, wherein the fire-resistant coating is fixed to the fixture by penetrating the male screw through the fire-resistant covering and fastening a nut to the male screw. 前記耐火被覆材は、ベース材である樹脂に熱膨張材が含まれて構成されていることを特徴とする請求項７または８に記載の耐火構造。 9. The fireproof structure according to claim 7, wherein the fireproof covering material is composed of a resin base material containing a thermal expansion material. 前記固定金具は、前記当接部と前記押圧部とが前記鉄骨梁の前記フランジを挟むことで、前記固定金具が前記鉄骨梁に取り付けられることを特徴とする請求項７から請求項９のいずれか１項に記載の耐火構造。 10. Any one of claims 7 to 9, wherein the fixing bracket is attached to the steel beam by sandwiching the flange of the steel beam between the abutting portion and the pressing portion. 1. The fireproof structure according to item 1. 床材が取り付けられる鉄骨梁の、前記床材より突出する側が可撓性を有する耐火被覆材によって被覆され、前記鉄骨梁に取り付けられると共に一部が前記床材に当接する固定金具に前記耐火被覆材が固定される耐火構造の施工方法において、
前記固定金具は、請求項１から６のいずれか１項に記載の耐火被覆材用固定金具であって、
前記鉄骨梁のフランジに前記固定金具を取り付けて、前記第２支持部が前記床材に当接し、
前記第１突起部及び第２突起部を前記耐火被覆材に貫通させて、前記耐火被覆材が前記固定金具に固定され、
前記鉄骨梁を前記耐火被覆材によって被覆することを特徴とする耐火構造の施工方法。 A steel beam to which a floor material is attached is coated with a flexible fireproof covering material on the side protruding from the floor material, and the fireproof covering is applied to a fixing bracket attached to the steel beam and partly in contact with the floor material. In the construction method of the fireproof structure where the material is fixed,
The fixture is the fixture for fireproof covering material according to any one of claims 1 to 6,
The fixing bracket is attached to the flange of the steel beam, and the second support portion abuts on the floor material,
The first protrusion and the second protrusion are passed through the fireproof covering material, and the fireproof covering material is fixed to the fixture,
A construction method for a fire-resistant structure, wherein the steel beam is covered with the fire-resistant covering material. 前記固定金具は、請求項６に記載の耐火被覆材用固定金具であって、
前記雄ねじを前記耐火被覆材に貫通させ、ナットを前記雄ねじに締結することにより、前記耐火被覆材が前記固定金具に固定されることを特徴とする請求項１１に記載の耐火構造の施工方法。 The fixture is the fixture for fireproof covering material according to claim 6,
12. The fireproof structure construction method according to claim 11, wherein the fireproof covering material is fixed to the fixture by passing the male screw through the fireproof covering material and fastening a nut to the male screw.
JP2021163125A 2021-10-01 2021-10-01 Fixing bracket for fireproof covering member, fireproof structure, and construction method of fireproof structure Pending JP2023053831A (en)

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