JP6939749B2 - Manufacturing method of fireproof coating member, fireproof coating structure, fireproof coating member - Google Patents

Manufacturing method of fireproof coating member, fireproof coating structure, fireproof coating member Download PDF

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JP6939749B2
JP6939749B2 JP2018198937A JP2018198937A JP6939749B2 JP 6939749 B2 JP6939749 B2 JP 6939749B2 JP 2018198937 A JP2018198937 A JP 2018198937A JP 2018198937 A JP2018198937 A JP 2018198937A JP 6939749 B2 JP6939749 B2 JP 6939749B2
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fireproof coating
rock wool
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JP2020066878A (en
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敏弘 梅田
敏弘 梅田
坂本　義仁
義仁 坂本
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JFE Steel Corp
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本発明は、鋼構造物の表面を被覆するための耐火被覆部材、耐火被覆構造、耐火被覆部材の製造方法に関する。 The present invention relates to a fireproof coating member, a fireproof coating structure, and a method for manufacturing a fireproof coating member for coating the surface of a steel structure.

建築物では火災による倒壊及び延焼を防止するために主要構造部に耐火性能が要求され、鋼構造建物では鋼材が火災で高温になると強度が低下し倒壊の恐れがあるため耐火被覆がなされる。 In buildings, fire resistance is required for the main structural parts to prevent collapse and spread of fire due to fire, and in steel structure buildings, if the steel material becomes hot due to fire, the strength will decrease and there is a risk of collapse, so fireproof coating is applied.

耐火被覆材には不燃材が用いられ、その種類は、吹付け耐火被覆材、強化石膏ボード、耐火塗料等多種多様である。吹付け耐火被覆材は現場で鉄骨構造体に吹き付ける耐火被覆材であり、吹付けロックウールがこれにあたる。吹付けロックウールは、ロックウール粒状綿を主原料とし、硬化材としてのセメント、水からなり、これらの混合物を現場で鉄骨構造体に専用の吹付け機で吹き付ける。 Non-combustible materials are used as the fire-resistant coating materials, and there are various types such as sprayed fire-resistant coating materials, reinforced gypsum boards, and fire-resistant paints. The sprayed fireproof coating material is a fireproof coating material that is sprayed onto the steel structure on site, and sprayed rock wool corresponds to this. Sprayed rock wool is made of rock wool granular cotton as the main raw material, and consists of cement and water as curing materials, and a mixture of these is sprayed on the steel frame structure with a dedicated spraying machine.

耐火被覆は使用材料により工法、費用、性能が異なるが、吹付け耐火被覆材は基本的に原料が安価であることと、吹き付けるだけの施工であるため施工が楽というメリットがある。一方で、現場の養生、硬化の待機等で時間がかかる、耐火被覆層の厚さにムラが生じ十分な耐火性を発揮できない恐れがある、別途化粧材を取り付ける必要があるといったデメリットがある。 The construction method, cost, and performance of the fireproof coating differ depending on the material used, but the sprayed fireproof coating has the advantages that the raw material is basically cheap and the construction is easy because it is only sprayed. On the other hand, there are disadvantages that it takes time for on-site curing, waiting for curing, etc., there is a risk that the thickness of the fireproof coating layer becomes uneven and sufficient fire resistance cannot be exhibited, and it is necessary to attach a separate decorative material.

強化石膏ボード、ケイ酸カルシウム板など、板状の耐火被覆材による耐火被覆は吹付け耐火被覆材ほど時間がかからず、被覆厚さの管理も容易であるというメリットがある一方で、費用が高額になるというデメリットがある。吹付けロックウール耐火被覆工法とケイ酸カルシウム板による耐火被覆工法では、ケイ酸カルシウム板による耐火被覆工法の方が約2倍の費用がかかる。 Fireproof coating with plate-shaped fireproof coating materials such as reinforced gypsum board and calcium silicate board has the advantage that it does not take as long as sprayed fireproof coating materials and it is easy to manage the coating thickness, but the cost is high. It has the disadvantage of being expensive. Of the sprayed rock wool fireproof coating method and the fireproof coating method using a calcium silicate board, the fireproof coating method using a calcium silicate board costs about twice as much.

耐火被覆方法の具体例として、特許文献１には、石膏ボード、断熱膨張シート、金属板からなるユニット部材による耐火鉄骨被覆体が提案されている。
また、特許文献２では、不燃性材料と熱膨張性耐火材による複合構造の耐火被覆構造が提案されている。 As a specific example of the fireproof coating method, Patent Document 1 proposes a fireproof steel frame covering body made of a unit member composed of a gypsum board, an adiabatic expansion sheet, and a metal plate.
Further, Patent Document 2 proposes a fireproof coating structure having a composite structure of a nonflammable material and a heat-expandable fireproof material.

特開２０００−１７０２８３号公報Japanese Unexamined Patent Publication No. 2000-170283 特開２００２−７０２０８号公報JP-A-2002-70208

特許文献１の耐火鉄骨被覆体は施工が簡易であるというメリットはあるが、ユニット部材のリベット接合部材が飛び出した形状となり化粧材を付ける場合に邪魔になること、熱膨張シートは材料費が高いため費用が高くつくこと等のデメリットがある。 The refractory steel frame coating body of Patent Document 1 has an advantage that it is easy to install, but the rivet joining member of the unit member has a protruding shape, which is an obstacle when applying a decorative material, and the material cost of the thermal expansion sheet is high. Therefore, there are disadvantages such as high cost.

また、特許文献２の耐火被覆構造は、施工性、生産性に優れるといったメリットはあるが、熱膨張性耐火材は材料費が非常に高く、費用が高くつくというデメリットがある。
以上のように、従来提案されているものは、施工性の改善というメリットはあるが、費用が高くつくという問題がある。 Further, the refractory coating structure of Patent Document 2 has advantages such as excellent workability and productivity, but the heat-expandable refractory material has a demerit that the material cost is very high and the cost is high.
As described above, the conventionally proposed ones have the merit of improving workability, but have the problem of high cost.

本発明はかかる課題を解決するためになされたものであり、施工性に優れると共にコスト低減もできるという、施工性とコスト低減の両立ができる耐火被覆部材、耐火被覆構造、耐火被覆部材の製造方法を提供することを目的としている。 The present invention has been made to solve such a problem, and a method for manufacturing a fireproof coating member, a fireproof coating structure, and a fireproof coating member capable of achieving both workability and cost reduction, which are excellent in workability and cost reduction. Is intended to provide.

（１）本発明に係る耐火被覆部材は、ロックウールを固化材で板状に固化してなる板状体と、該板状体の側面の少なくとも一部を覆うように設けられてビス留めするための不燃材からなる接合部材とを有することを特徴とするものである。 (1) The fireproof coating member according to the present invention is provided and screwed so as to cover at least a part of a plate-like body formed by solidifying rock wool with a solidifying material and a side surface of the plate-like body. It is characterized by having a joining member made of a non-combustible material for the purpose.

（２）また、上記（１）に記載のものにおいて、前記板状体の内部に設けられて前記板状体に定着されたシート状の定着部材を有し、該定着部材と前記接合部材が接合されていることを特徴とするものである。 (2) Further, in the above-described item (1), the sheet-like fixing member provided inside the plate-shaped body and fixed to the plate-shaped body is provided, and the fixing member and the joining member are formed. It is characterized by being joined.

（３）また、上記（１）又は（２）に記載のものにおいて、前記板状体は上辺と下辺を有し、上辺と下辺に相欠継ぎ用の段部を有することを特徴とするものである。 (3) Further, in the above-mentioned (1) or (2), the plate-shaped body has an upper side and a lower side, and has a step portion for splicing on the upper side and the lower side. Is.

（４）また、本発明に係る耐火被覆構造は、上記（１）乃至（３）のいずれかに記載の耐火被覆部材を複数枚、被覆対象である構造物の周囲を囲むように配置し、隣り合う耐火被覆部材に跨るように連結具を配置して、該連結具と前記接合部材をビス留めすることで隣接する耐火被覆部材を連結してなることを特徴とするものである。 (4) Further, in the refractory coating structure according to the present invention, a plurality of refractory coating members according to any one of (1) to (3) above are arranged so as to surround the structure to be coated. It is characterized in that the connecting tool is arranged so as to straddle the adjacent fireproof covering members, and the adjacent fireproof covering members are connected by fastening the connecting tool and the joining member with screws.

（５）また、上記（４）に記載のものにおいて、隣り合う板状体間にシート状の耐火材を挟むように配置したことを特徴とするものである。 (5) Further, in the above-mentioned item (4), the sheet-like refractory material is arranged so as to be sandwiched between adjacent plate-like bodies.

（６）また、構造物の耐火被覆部材の製造方法であって、
ロックウール、固化材、水の混合物を有底枠状の型枠に吹付けるロックウール吹付け工程と、吹付けられた前記混合物を圧密する圧密工程と、前記混合物が硬化した後に型枠を外す型枠外し工程とを備えたことを特徴とするものである。 (6) Further, it is a method for manufacturing a fireproof coating member of a structure.
A rock wool spraying step of spraying a mixture of rock wool, a solidifying material, and water onto a bottomed frame-shaped mold, a compaction step of compacting the sprayed mixture, and removing the mold after the mixture has hardened. It is characterized by having a mold removing process.

（７）また、上記（６）に記載のものにおいて、前記ロックウール吹付け工程は、厚み方向の途中までの吹付けを行う第１ロックウール吹付け工程と、残りのロックウールを吹付ける第２ロックウール吹付け工程を有し、
前記圧密工程は、第１圧密工程と、第２圧密工程を有し、
第１ロックウール吹付け工程の後に第１圧密工程を行い、
該第１圧密工程の後、不燃材からなる接合部材が接合されたシート状の定着部材を配設する定着部材配設工程をさらに有し、
該定着部材配設工程の後、前記第２ロックウール吹付け工程を行い、その後第２圧密工程を行うことを特徴とするものである。 (7) Further, in the above-described item (6), the rock wool spraying step includes a first rock wool spraying step of spraying halfway in the thickness direction and a second rock wool spraying step of spraying the remaining rock wool. Has a 2 rock wool spraying process,
The consolidation step includes a first consolidation step and a second consolidation step.
After the first rock wool spraying process, the first consolidation process is performed,
After the first consolidation step, a fixing member disposing step of disposing a sheet-shaped fixing member to which a joining member made of a non-combustible material is joined is further provided.
After the fixing member disposing step, the second rock wool spraying step is performed, and then the second consolidation step is performed.

本発明に係る耐火被覆部材は、ロックウールを固化材で板状に固化してなる板状体と、該板状体の側面の少なくとも一部を覆うように設けられてビス留めするための不燃材からなる接合部材とを有することにより、施工性に優れると共にコスト低減もできるという、施工性とコスト低減の両立が実現されている。 The fireproof coating member according to the present invention is a plate-shaped body formed by solidifying rock wool into a plate shape with a solidifying material, and is provided so as to cover at least a part of the side surface of the plate-shaped body and is nonflammable for fastening with screws. By having a joint member made of a material, both workability and cost reduction are realized, in which workability is excellent and cost can be reduced.

本発明の実施の形態１に係る耐火被覆部材の説明図であって、図１（ａ）が平面図、図１（ｂ）が正面図、図１（ｃ）が側面図である。It is explanatory drawing of the refractory coating member which concerns on Embodiment 1 of this invention, FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view. 図１に示す耐火被覆部材によって構成された耐火被覆構造の説明図である。It is explanatory drawing of the refractory coating structure composed of the refractory coating member shown in FIG. 図２に示した耐火被覆構造における隣接する耐火被覆部材の接合方法の説明図である。It is explanatory drawing of the joining method of the adjacent refractory coating member in the refractory coating structure shown in FIG. 図３の他の態様の説明図である。It is explanatory drawing of another aspect of FIG. 図１の他の態様の説明図である。It is explanatory drawing of another aspect of FIG. 実施の形態２において用いる型枠の説明図であって、図６（ｂ）が平面図、図６（ａ）が図６（ｂ）の矢視Ａ−Ａ断面図である。It is explanatory drawing of the formwork used in Embodiment 2, FIG. 6B is a plan view, and FIG. 6A is a cross-sectional view taken along the line AA of FIG. 6B. 実施の形態２における耐火被覆部材の製造方法の説明図である。It is explanatory drawing of the manufacturing method of the refractory coating member in Embodiment 2.

［実施の形態１］
本実施の形態に係る耐火被覆部材１は、図１に示すように、ロックウールを固化材で板状に固化してなる板状体３と、板状体３の側面の少なくとも一部を覆うように設けられてビス留めするための不燃材からなる接合部材５と、接合部材５に連結されると共に板状体３の内部に設けられて板状体３に定着されたシート状の定着部材７を有している。
以下、各構成を詳細に説明する。 [Embodiment 1]
As shown in FIG. 1, the fireproof coating member 1 according to the present embodiment covers at least a part of the plate-like body 3 formed by solidifying rock wool into a plate shape with a solidifying material and the side surface of the plate-like body 3. A joining member 5 made of a non-combustible material for fastening with screws, and a sheet-shaped fixing member connected to the joining member 5 and provided inside the plate-shaped body 3 and fixed to the plate-shaped body 3. Has 7.
Hereinafter, each configuration will be described in detail.

＜板状体＞
板状体３は、吹付けロックウールの原料となるロックウール（ロックウール粒状綿）、固化材の一例としてのセメント、水の混合物が硬化してなるものである。具体的な製造方法の詳細は、実施の形態２で説明するが、要するに型枠に吹付けロックウールを吹き付けて硬化させて製造する。固化材はセメントに限らず、ロックウールを板状に固化できるものであればよい。
本実施の形態の板状体３は、矩形状であり、両側面の一部が、図１（ａ）に示すように、斜め４５度に傾斜する面取り部９となっている。板状体３を連結する際には、面取り部９を隣接する板状体３と当接させる。
板状体３の厚さは、一般の吹付けロックウール耐火被覆工法において耐火被覆に必要とされる被覆厚さと同等の厚さである。 <Plate-shaped body>
The plate-shaped body 3 is formed by hardening a mixture of rock wool (rock wool granular cotton), which is a raw material of sprayed rock wool, cement as an example of a solidifying material, and water. The details of the specific manufacturing method will be described in the second embodiment, but in short, it is manufactured by spraying sprayed rock wool onto the mold and curing it. The solidifying material is not limited to cement, and may be any material that can solidify rock wool into a plate shape.
The plate-shaped body 3 of the present embodiment has a rectangular shape, and a part of both side surfaces thereof is a chamfered portion 9 inclined at an angle of 45 degrees as shown in FIG. 1A. When connecting the plate-shaped bodies 3, the chamfered portion 9 is brought into contact with the adjacent plate-shaped body 3.
The thickness of the plate-shaped body 3 is the same as the coating thickness required for the fireproof coating in the general sprayed rock wool fireproof coating method.

＜接合部材＞
接合部材５は、板状体３の側面における面取り部９以外の部位を覆うように設けられている。接合部材５は、軸方向直交断面が略Ｌ字状の条材を、Ｌ字の一片を板状体３の側面に当接させ、Ｌ字の他の一片を板状体３内に挿入させて板状体３に取り付けられている。
接合部材５は、例えば鋼材、無機物成形材など、500℃以下では溶融しない不燃材からなり、例えば鋼材を用いるのがよい。 <Joining member>
The joining member 5 is provided so as to cover a portion of the side surface of the plate-shaped body 3 other than the chamfered portion 9. In the joining member 5, a strip having a substantially L-shaped cross section in the axial direction is brought into contact with the side surface of the plate-shaped body 3 with an L-shaped piece, and the other L-shaped piece is inserted into the plate-shaped body 3. It is attached to the plate-shaped body 3.
The joining member 5 is made of a non-combustible material that does not melt at 500 ° C. or lower, such as a steel material or an inorganic molding material, and it is preferable to use a steel material, for example.

＜定着部材＞
定着部材７は、板状体３の内部に設けられて板状体３に定着されたシート状の部材であって、例えば網目状のラスによって構成されている。定着部材７は、施工時に板状体３が割れないようにするための補強部材である。
また、定着部材７の側辺は、接合部材５に接合されており、接合部材５が脱落するのを防止する機能を有している。すなわち、耐火被覆部材１が火災の熱にさらされた際に、接合部材５が熱による変形によって板状体３から脱落することが考えられるが、接合部材５を定着部材７に接合することで、接合部材５の板状体３からの脱落を防止できる。 <Fixing member>
The fixing member 7 is a sheet-like member provided inside the plate-shaped body 3 and fixed to the plate-shaped body 3, and is composed of, for example, a mesh-like lath. The fixing member 7 is a reinforcing member for preventing the plate-shaped body 3 from cracking during construction.
Further, the side side of the fixing member 7 is joined to the joining member 5, and has a function of preventing the joining member 5 from falling off. That is, when the fireproof coating member 1 is exposed to the heat of a fire, it is conceivable that the joining member 5 will fall off from the plate-like body 3 due to deformation due to heat. , It is possible to prevent the joining member 5 from falling off from the plate-shaped body 3.

次に、上記のように構成された本実施の形態に係る耐火被覆部材１によって、構造物、例えば鋼構造物である角形鋼管の表面を被覆して耐火被覆構造を構成する方法について説明する。
図２に示すように、被覆対象である角形鋼管１０の周囲を囲むように耐火被覆部材１を配置する。隣接する耐火被覆部材１は、板状体３における傾斜した面取り部９が互いに当接している。隣接する耐火被覆部材１同志の端部には、接合部材５によって直角のＬ字溝が形成される。このＬ字溝に軸方向直交断面が略Ｌ字の連結具１１を配置し、図３に示すように、ビス１３によって留める。これによって、隣接する耐火被覆部材１同志が連結具１１を介して連結される。 Next, a method of covering the surface of a structure, for example, a square steel pipe, which is a steel structure, with the fireproof coating member 1 according to the present embodiment configured as described above to form a fireproof coating structure will be described.
As shown in FIG. 2, the fireproof coating member 1 is arranged so as to surround the square steel pipe 10 to be coated. In the adjacent fireproof coating member 1, the inclined chamfered portions 9 in the plate-shaped body 3 are in contact with each other. A right-angled L-shaped groove is formed by the joining member 5 at the ends of the adjacent fireproof coating members 1. A connector 11 having a substantially L-shaped cross section orthogonal to the axial direction is arranged in the L-shaped groove, and is fastened by a screw 13 as shown in FIG. As a result, the adjacent fireproof coating members 1 are connected to each other via the connecting tool 11.

上記のように構成された本実施の形態に係る耐火被覆部材１は、吹付けロックウールの原料となるロックウール、セメント、水の混合物が硬化してなる板状体３で構成されているので、ケイ酸カルシウム板等に比較するとコストが大幅に低減されている。
その一方で、施工については、ケイ酸カルシウム板等と同様に、隣接する板状の耐火被覆部材１をビス留めするだけであるため極めて簡単である。 Since the fireproof coating member 1 according to the present embodiment configured as described above is composed of a plate-like body 3 formed by hardening a mixture of rock wool, cement, and water, which are raw materials for sprayed rock wool. , The cost is significantly reduced as compared with the calcium silicate board and the like.
On the other hand, the construction is extremely simple because the adjacent plate-shaped fireproof coating member 1 is only screwed in the same manner as the calcium silicate plate or the like.

なお、耐火被覆部材１は、傾斜した面取り部９を設けているので、耐火被覆構造とする際に隣接する耐火被覆部材１の面取り部９同士を当接させることで、耐火上有害な隙間を生じないようになっているが、図４に示すように、隣り合う耐火被覆部材１における傾斜した面取り部９の間に、シート状の耐火材１５を挟むように配置してもよい。耐火材１５を設けることで、耐火材１５が確実に隙間を塞ぐことができ、すきまから被覆対象が急激に熱せられることを防止できる。耐火材１５としては、例えばフェルト状のロックウールが挙げられる。 Since the fireproof coating member 1 is provided with an inclined chamfered portion 9, the chamfered portions 9 of the adjacent fireproof coating members 1 are brought into contact with each other when the fireproof coating structure is formed, thereby creating a gap harmful to fire resistance. Although it does not occur, as shown in FIG. 4, the sheet-shaped refractory material 15 may be arranged so as to be sandwiched between the inclined chamfered portions 9 of the adjacent refractory coating members 1. By providing the refractory material 15, the refractory material 15 can surely close the gap, and it is possible to prevent the object to be covered from being suddenly heated from the gap. Examples of the refractory material 15 include felt-like rock wool.

図１に示した耐火被覆部材１は、上辺と下辺は共に平坦面からなるものであった。しかし、耐火被覆部材１は、例えば鋼管柱に沿って下から上に積み上げるように連結して使用されることが多いため、隣接する上下の耐火被覆部材１同志の連結を容易にするため、図５に示すように、各耐火被覆部材１の上辺と下辺に段部１７を設け、耐火被覆部材１の上下で連結するもの同士が相欠継ぎとなるようにしてもよい。
上下の耐火被覆部材１を相欠継ぎにすることで、耐火被覆部材１に熱による変形が生じても横目地部分に隙間が生ずることなく、被覆対象が覆われたままの状態となり、横目地部分の耐火性が向上するのでより好ましい。 The fireproof coating member 1 shown in FIG. 1 had a flat surface on both the upper side and the lower side. However, since the refractory covering member 1 is often used by being connected so as to be stacked from the bottom to the top along the steel pipe column, for example, in order to facilitate the connection of the adjacent upper and lower refractory covering members 1 As shown in 5, step portions 17 may be provided on the upper side and the lower side of each refractory coating member 1, so that those connected at the top and bottom of the refractory coating member 1 may be interconnected.
By making the upper and lower refractory coating members 1 splice joints, even if the refractory coating member 1 is deformed by heat, there is no gap in the horizontal joint portion, and the covering target remains covered, and the horizontal joint is maintained. It is more preferable because the fire resistance of the portion is improved.

また、上記の実施の形態では、接合部材５の脱落を防止するために接合部材５とは別体の定着部材７を板状体３の内部に配設して、接合部材５を定着部材７に接合するようにしたが、接合部材５の脱落を防止するために定着部材７は必須ではなく、接合部材５における板状体３内に埋め込む部位の形状を例えば鈎型等にして脱落を防止するようにしてもよい。 Further, in the above embodiment, in order to prevent the joining member 5 from falling off, a fixing member 7 separate from the joining member 5 is arranged inside the plate-shaped body 3, and the joining member 5 is placed inside the plate-shaped body 3. However, the fixing member 7 is not indispensable in order to prevent the joining member 5 from falling off, and the shape of the portion of the joining member 5 to be embedded in the plate-shaped body 3 is made, for example, a hook shape to prevent the joining member 5 from falling off. You may try to do it.

［実施の形態２］
本実施の形態の耐火被覆部材１の製造方法は、型枠に吹付けロックウールを吹付けて実施の形態１に示した耐火被覆部材１を製造する方法であって、第１ロックウール吹付け工程、第１圧密工程、定着部材配設工程、第２ロックウール吹付け工程、第２圧密工程、型枠外し工程を有している。
本方法に用いる型枠、工程の詳細及び各工程に用いる物品について説明する。 [Embodiment 2]
The method for manufacturing the fireproof coating member 1 of the present embodiment is a method for manufacturing the fireproof coating member 1 shown in the first embodiment by spraying sprayed rock wool onto a mold, and the first rock wool is sprayed. It has a process, a first compaction process, a fixing member disposing process, a second rock wool spraying process, a second compaction process, and a mold removing process.
The mold used in this method, the details of the process, and the articles used in each process will be described.

＜型枠＞
使用する型枠１９は、図６に示すように、矩形の有底枠形状のものである。型枠１９の枠部における長辺の内面側の立ち上がり部２１は、図６（ａ）に示すように、底面から斜め上方に向かう傾斜面部２１ａを経て直立面部２１ｂとなっている。この傾斜面部２１ａは、型枠１９の底部と一体的に形成してもよいし、拡大図で示すように、軸直交断面が2等辺三角形の条材２３を型枠１９の角部に載置するようにして形成してもよい。
底面から枠部の上端面までの高さは、耐火被覆部材１の仕上がり厚さ寸法となる。傾斜面部２１ａの部分が、耐火被覆部材１の面取り部９となる。傾斜面部２１ａの高さは、底面から枠部の上端面までの高さの約半分である。 <Formwork>
As shown in FIG. 6, the mold 19 used has a rectangular bottomed frame shape. As shown in FIG. 6A, the rising portion 21 on the inner surface side of the long side of the frame portion of the form 19 is an upright surface portion 21b via an inclined surface portion 21a extending diagonally upward from the bottom surface. The inclined surface portion 21a may be formed integrally with the bottom portion of the formwork 19, or as shown in the enlarged view, a strip 23 having an isosceles right triangular cross section is placed on the corner portion of the formwork 19. It may be formed as follows.
The height from the bottom surface to the upper end surface of the frame portion is the finished thickness dimension of the fireproof coating member 1. The portion of the inclined surface portion 21a becomes the chamfered portion 9 of the fireproof coating member 1. The height of the inclined surface portion 21a is about half the height from the bottom surface to the upper end surface of the frame portion.

＜第１ロックウール吹付け工程＞
第１ロックウール吹付け工程は、図７（ａ）に示すように、吹付けロックウールの原料となるロックウール、セメント、水の混合物を有底枠状の型枠１９に、専用の吹付け機で吹付ける工程である。
第１ロックウール吹付け工程では、型枠１９の側部の傾斜面部２１ａの頂部より少し高い位置まで吹付ける。 <1st rock wool spraying process>
In the first rock wool spraying step, as shown in FIG. 7A, a mixture of rock wool, cement, and water, which are the raw materials of the sprayed rock wool, is sprayed onto the bottomed frame-shaped mold 19 exclusively. This is the process of spraying with a machine.
In the first rock wool spraying step, the mold 19 is sprayed to a position slightly higher than the top of the inclined surface portion 21a on the side portion.

＜第１圧密工程＞
第１圧密工程は、第１ロックウール吹付け工程で吹き付けられた吹付けロックウールを、型枠１９の側部の傾斜面部２１ａの頂部まで圧密する工程である。この工程では、突出高さが、立ち上がり部２１の直立面部２１ｂと略等しい下向きに凸の冶具を用いて行うようにする。
吹付ロックウールを均一に吹き付けることは難しいが、第１圧密工程を経ることで、吹付けロックウールの均一化ができる。 <First consolidation process>
The first consolidation step is a step of compacting the sprayed rock wool sprayed in the first rock wool spraying step to the top of the inclined surface portion 21a on the side portion of the mold 19. In this step, the protrusion height is made to be performed by using a downwardly convex jig that is substantially equal to the upright surface portion 21b of the rising portion 21.
It is difficult to spray the sprayed rock wool uniformly, but the sprayed rock wool can be made uniform by going through the first consolidation step.

被覆対象に吹付けロックウールを直接吹き付ける場合、この吹付けロックウールの耐火性能には被覆厚さと密度が大きく関係し、現場では被覆厚さと密度を十分確保するよう管理に努めるが、被覆対象に吹き付けた後の密度の計測は難しく、管理が困難である。特に、例えば曲線状のように形状が特殊な被覆対象の場合はより一層管理が困難であり、密度が足りず十分な耐火性能が得られない恐れがある。この点、本実施の形態では第１圧密工程、および第２圧密工程を有することで、密度も安定して確保でき十分な耐火性能が発揮できる。 When sprayed rock wool is sprayed directly onto the object to be coated, the fire resistance performance of the sprayed rock wool is greatly related to the coating thickness and density. It is difficult to measure the density after spraying and it is difficult to manage. In particular, in the case of a covering object having a special shape such as a curved shape, it is more difficult to manage, and there is a possibility that sufficient fire resistance cannot be obtained due to insufficient density. In this respect, in the present embodiment, by having the first consolidation step and the second consolidation step, the density can be stably secured and sufficient fire resistance can be exhibited.

なお、吹付けロックウールを均一に吹付けることは難しいので、第１圧密工程の前工程として、吹付けられたロックウールをほぼ均一に均す工程を経るようにするのがより望ましい。この点は、後述の第２圧密工程においても同様である。 Since it is difficult to spray the sprayed rock wool uniformly, it is more desirable to go through a step of leveling the sprayed rock wool substantially uniformly as a pre-step of the first consolidation step. This point is the same in the second consolidation step described later.

＜定着部材配設工程＞
定着部材配設工程は、図７（ｂ）に示すように、不燃材からなる接合部材５が接合されたシート状の定着部材７を配設する工程である。
接合部材５は実施の形態１で説明したように、例えば略Ｌ字状の条材であり、また、定着部材７は、例えば矩形状で網目状のラスである。定着部材７の側辺部と接合部材５の長さとは略同一に設定されており、接合部材５におけるＬ字の一片が定着部材７の側辺部に重ねられ、結束あるいは溶接により接合されている。
定着部材７が吹付けロックウールに定着され、定着部材７に接合部材５が接合されることで、接合部材５が吹付けロックウールから脱落するのを防止することができる。 <Fixing member placement process>
As shown in FIG. 7B, the fixing member arranging step is a step of arranging the sheet-shaped fixing member 7 to which the joining member 5 made of a noncombustible material is joined.
As described in the first embodiment, the joining member 5 is, for example, a substantially L-shaped strip, and the fixing member 7 is, for example, a rectangular and mesh-like lath. The side portion of the fixing member 7 and the length of the joining member 5 are set to be substantially the same, and an L-shaped piece of the joining member 5 is overlapped with the side side portion of the fixing member 7 and joined by bundling or welding. There is.
By fixing the fixing member 7 to the sprayed rock wool and joining the joining member 5 to the fixing member 7, it is possible to prevent the joining member 5 from falling off from the sprayed rock wool.

＜第２ロックウール吹付け工程＞
第２ロックウール吹付け工程は、図７（ｃ）に示すように、配設された定着部材７の上にロックウールを、立ち上がり部２１の上端面よりも上方まで吹付ける工程である。 <Second rock wool spraying process>
As shown in FIG. 7C, the second rock wool spraying step is a step of spraying rock wool onto the disposed fixing member 7 to the upper side of the upper end surface of the rising portion 21.

＜第２圧密工程＞
第２圧密工程は、立ち上がり部２１の上端面よりも上方に吹き付けられた吹付けロックウールを、立ち上がり部２１の上端面と同一高さまで、例えば平板によって圧密する工程である。 <Second consolidation process>
The second consolidation step is a step of compacting the sprayed rock wool sprayed above the upper end surface of the rising portion 21 to the same height as the upper end surface of the rising portion 21 by, for example, a flat plate.

＜型枠外し工程＞
型枠外し工程は、吹付けロックウールが硬化した後、型枠１９を外して耐火被覆部材１（図７（ｄ）参照）を取り出す工程である。型枠１９に吹付ロックウールとの剥離性に優れたシートを貼り付けることで、型枠１９が外しやすくなる。また、型枠１９に化粧材を用いれば、型枠材を全て外す必要がなくなり、別途取り付ける化粧材も一部省略することができる。 <Molding process>
The mold removing step is a step of removing the mold 19 and taking out the fireproof coating member 1 (see FIG. 7D) after the sprayed rock wool is cured. By attaching a sheet having excellent peelability from sprayed rock wool to the formwork 19, the formwork 19 can be easily removed. Further, if a decorative material is used for the mold 19, it is not necessary to remove all the mold material, and a part of the decorative material to be separately attached can be omitted.

なお、実施の形態１で述べたように、各耐火被覆部材１の上辺と下辺に段部１７を設け、耐火被覆部材１の上下で連結するもの同士が相欠継ぎとなるようにするには、型枠１９の上辺と下辺の立ち上がり部２１に段部１７を形成するようにすればよい。 As described in the first embodiment, in order to provide stepped portions 17 on the upper side and the lower side of each fireproof coating member 1 so that the ones connected at the top and bottom of the fireproof coating member 1 are jointed to each other. , The step portion 17 may be formed on the rising portions 21 on the upper side and the lower side of the mold 19.

１ 耐火被覆部材
３ 板状体
５ 接合部材
７ 定着部材
９ 面取り部
１０ 角形鋼管
１１ 連結具
１３ ビス
１５ 耐火材
１７ 段部
１９ 型枠
２１ 立ち上がり部
２１ａ 傾斜面部
２１ｂ 直立面部
２３ 条材 1 Fireproof coating member 3 Plate-shaped body 5 Joining member 7 Fixing member 9 Chamfering part 10 Square steel pipe 11 Connector 13 Screw 15 Fireproof material 17 Step part 19 Formwork 21 Rising part 21a Inclined surface part 21b Upright surface part 23

Claims (6)

構造物の耐火被覆部材であって、
ロックウールを固化材で板状に固化してなる板状体と、該板状体の側面の少なくとも一部を覆うように設けられてビス留めするための不燃材からなる接合部材と、前記板状体の内部に設けられて前記板状体に定着されたシート状の定着部材と、を有し、該定着部材と前記接合部材が接合されていることを特徴とする耐火被覆部材。 A fireproof coating member of a structure
A plate-like body formed by solidifying rock wool into a plate shape with a solidifying material, a joining member made of a non-combustible material provided so as to cover at least a part of the side surface of the plate-like body and fastened with screws, and the plate. A fireproof coating member having a sheet-shaped fixing member provided inside the body and fixed to the plate-like body, and the fixing member and the joining member being joined to each other. 前記板状体は上辺と下辺を有し、上辺と下辺に相欠継ぎ用の段部を有することを特徴とする請求項１に記載の耐火被覆部材。 The fireproof coating member according to claim 1 , wherein the plate-shaped body has an upper side and a lower side, and has step portions for splicing on the upper side and the lower side. 請求項１又は２に記載の耐火被覆部材を複数枚、被覆対象である構造物の周囲を囲むように配置し、隣り合う耐火被覆部材に跨るように連結具を配置して、該連結具と前記接合部材をビス留めすることで隣接する耐火被覆部材を連結してなることを特徴とする耐火被覆構造。 A plurality of the fireproof coating members according to claim 1 or 2 are arranged so as to surround the periphery of the structure to be covered, and the connecting tool is arranged so as to straddle the adjacent fireproof covering member. A fireproof coating structure characterized in that adjacent fireproof coating members are connected by fastening the joining members with screws. 隣り合う板状体間にシート状の耐火材を挟むように配置したことを特徴とする請求項３記載の耐火被覆構造。 The fireproof coating structure according to claim 3 , wherein a sheet-shaped refractory material is arranged so as to be sandwiched between adjacent plate-shaped bodies. ロックウールを固化材で板状に固化してなる板状体と、該板状体の側面の少なくとも一部を覆うように設けられてビス留めするための不燃材からなる接合部材とを有する耐火被覆部材を複数枚、被覆対象である構造物の周囲を囲むように配置し、隣り合う耐火被覆部材に跨るように連結具を配置して、該連結具と前記接合部材をビス留めすることで隣接する耐火被覆部材を連結してなり、隣り合う板状体間にシート状の耐火材を挟むように配置したことを特徴とする耐火被覆構造。A refractory having a plate-like body obtained by solidifying rock wool into a plate shape with a solidifying material and a joining member made of a non-combustible material provided so as to cover at least a part of the side surface of the plate-like body and fastened with screws. By arranging a plurality of covering members so as to surround the periphery of the structure to be covered, arranging the connecting tool so as to straddle the adjacent fireproof covering member, and fastening the connecting tool and the joining member with screws. A fireproof coating structure characterized in that adjacent fireproof coating members are connected and arranged so as to sandwich a sheet-shaped fireproof material between adjacent plate-shaped bodies. 構造物の耐火被覆部材の製造方法であって、
ロックウール、固化材、水の混合物を有底枠状の型枠に吹付けるロックウール吹付け工程と、吹付けられた前記混合物を圧密する圧密工程と、前記混合物が硬化した後に型枠を外す型枠外し工程とを備え、
前記ロックウール吹付け工程は、厚み方向の途中までの吹付けを行う第１ロックウール吹付け工程と、残りのロックウールを吹付ける第２ロックウール吹付け工程を有し、
前記圧密工程は、第１圧密工程と、第２圧密工程を有し、
第１ロックウール吹付け工程の後に第１圧密工程を行い、
該第１圧密工程の後、不燃材からなる接合部材が接合されたシート状の定着部材を配設する定着部材配設工程をさらに有し、
該定着部材配設工程の後、前記第２ロックウール吹付け工程を行い、その後第２圧密工程を行うことを特徴とする耐火被覆部材の製造方法。 It is a method of manufacturing a fireproof coating member of a structure.
A rock wool spraying step of spraying a mixture of rock wool, a solidifying material, and water onto a bottomed frame-shaped mold, a compaction step of compacting the sprayed mixture, and removing the mold after the mixture has hardened. Equipped with a mold removal process
The rock wool spraying step includes a first rock wool spraying step of spraying halfway in the thickness direction and a second rock wool spraying step of spraying the remaining rock wool.
The consolidation step includes a first consolidation step and a second consolidation step.
After the first rock wool spraying process, the first consolidation process is performed,
After the first consolidation step, a fixing member disposing step of disposing a sheet-shaped fixing member to which a joining member made of a non-combustible material is joined is further provided.
A method for producing a refractory coating member, which comprises performing the second rock wool spraying step after the fixing member disposing step, and then performing a second compaction step.
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