JP2006115625A

JP2006115625A - Construction method for fire protection construction of cable penetrating portion in building, and fire protection construction of cable penetrating portion in building

Info

Publication number: JP2006115625A
Application number: JP2004301120A
Authority: JP
Inventors: Tomohiro Honda; 友弘本田
Original assignee: CFS KK
Current assignee: CFS KK
Priority date: 2004-10-15
Filing date: 2004-10-15
Publication date: 2006-04-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple fire protection construction excellent in fire resistance for a cable penetrating portion in a building. <P>SOLUTION: The fire protection construction for a cable penetrating portion in a building is obtained as follows: a fireproof partitioning material 9 is placed using fastening tools 13 each consisting of an anchoring member and a supporting member formed of a round bar or a square bar or directly without use of the fastening tools 13. The contacting faces or gap between the fireproof partitioning material 9 and a cable 3 is filled with a mill end 11 of the fireproof partitioning material or heat-resistant sealing material 10. Fire spread arresting agent 12 is applied to the surface of the cable. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ビルやマンション、工場等における大きな建物における壁や床等の開口部を貫通する電気配線ケーブルの防火構造に関し、更に詳しくは、日本建築センターの１時間の耐火試験に対応出来る新規な建物ケーブル貫通部の防火構造を提供するものである。 The present invention relates to a fire prevention structure of an electric wiring cable that penetrates openings of walls, floors, etc. in large buildings in buildings, condominiums, factories, etc., and more specifically, a novel structure that can support a one-hour fire resistance test of the Japan Building Center. The fire prevention structure of the building cable penetration is provided.

従来、ビルやマンション、工場等における大きな建物においては、建物が出火した場合に他の部屋への延焼を防止するためにいくつかの区画に仕切っており、それぞれの境界の壁や床に耐火スラブで防火区画を設けている。 Conventionally, large buildings in buildings, condominiums, factories, etc. have been divided into several sections in order to prevent the spread of fire to other rooms when the building fires, and refractory slabs are formed on each boundary wall and floor. There is a fire prevention zone.

これらの構造体を示すものとして特公平５−５２１２２号「建物耐火スラブの貫通部防火構造」は、「建物の耐火スラブに開設されてケーブル等の貫通物が貫通する貫通孔に耐火材で防火空間を形成し、この防火空間内には結合材を用いて吸熱性耐火材と熱膨張性耐火材の混合物又は吸熱性及び熱膨張性を有する耐火材を粒径１〜25ｍｍの顆粒状に成形してなる吸熱性。熱膨張性顆粒状耐火充填材を充填し、上記防火空間内において貫通物を吸熱性・熱膨張性顆粒状体か充填材で完全に包囲した建物耐火スラブの貫通部防火構造」が開示されている。 To show these structures, Japanese Patent Publication No. 5-52122 “Fire-proofing structure for building fireproof slabs” is “Fireproofing with fireproof material in the through-holes that are opened in the building fireproof slabs and through which cables and other penetrations pass. A space is formed, and a mixture of heat-absorbing fire-resistant material and heat-expandable fire-resistant material or heat-resistant and heat-expandable fire-resistant material is formed into granules with a particle size of 1 to 25 mm using a binder in the fire-proof space. The building fireproof slab penetration fireproof, filled with thermally expandable granular refractory filler and completely enclosing the penetrating material with the endothermic / thermally expandable granular material or filler in the fireproof space. "Structure" is disclosed.

さらに特許第２９１６６６８号「ケーブル貫通部の防火構造」は、「複数のケーブルが、ケーブルラック内に収容された状態で、構造物の隔壁若しくは床壁を貫通する壁貫通孔に貫通配置され、上記複数のケーブル及びケーブルトラックの外周囲と上記壁貫通孔の開口部との間の隙間が耐火性仕切板により遮蔽されたケーブル貫通部の防火構造において、上記複数のケーブル及びケーブルラックの外周囲を、上記壁貫通孔の片側開口部から上記ケーブルの長手方向外側範囲にわたり覆う防火パテと着部と、この防火パテ塗着部を上記ケーブルの長手方向に直交する方向の両側から挟んで遮蔽する一対の耐火性遮蔽板と、この一対の遮蔽板を互いに独立して上記ケーブルトラックに対し着脱可能に位置固定する少なくとも一対の固定手段とを備えているケーブル貫通部の防火構造」が開示されている。 Further, Japanese Patent No. 2916668 “Fire-proofing structure of cable penetration part” has “a plurality of cables housed in a cable rack and arranged through a wall through-hole penetrating a partition wall or floor wall of the structure, In the fire prevention structure of the cable penetration part in which the gap between the outer periphery of the plurality of cables and cable tracks and the opening of the wall through hole is shielded by the fireproof partition plate, the outer periphery of the plurality of cables and the cable rack is provided. A fire-resistant putty and a covering portion covering the one-side opening of the wall through-hole from the outer side in the longitudinal direction of the cable, and a pair for shielding the fire-resistant putty-coated portion from both sides in a direction perpendicular to the longitudinal direction of the cable And a pair of fixing means for detachably fixing the pair of shielding plates to the cable track independently of each other. And fire the structure of the cable penetration portion has "is disclosed.

しかしながら従来の防火構造は、いずれも日本建築センターの２時間の耐火試験に合格するために、ロックウールを用いる場合には２００ｋｇ/ｍ^３の充填密度で充填したり、防火パテを使用する場合には厚く整形すると剥離や脱落という危険性を有していたため、顆粒状からなる耐火充填材を用いたり一対の遮蔽板を用いてこれらを固定具で固定する等の対応をしていた。
特公平５−５２１２２号特許第２９１６６６８号 However, all of the conventional fire prevention structures pass the 2-hour fire resistance test of Nippon Building Center. When rock wool is used, it is filled at a packing density of 200 kg / m ³ or when fire prevention putty is used. Since there was a risk of peeling or dropping off when it was thickly shaped, measures were taken such as using a refractory filler made of granules or fixing a pair of shielding plates with a fixture.
Japanese Patent Publication No. 5-52122 Japanese Patent No. 2916668

近年、上記日本建築センターの耐火試験の時間が２時間から１時間へと改正されるようになり、簡易な構造体でしかも耐火特性に優れた防火構造の開発が建築業界の中で望まれていた。 In recent years, the fire resistance test time at the Japan Building Center has been revised from 2 hours to 1 hour, and the development of a fire prevention structure with a simple structure and excellent fire resistance has been desired in the construction industry. It was.

また従来の構造体のようにロックウール等のような繊維状充填材を用いること無く、公害上対策にも優れた素材を用いる新規な構造物の開発も併せて望まれていた。 In addition, there has been a demand for the development of a new structure using a material excellent in measures against pollution without using a fibrous filler such as rock wool as in the conventional structure.

本発明者は掛かる課題を解決するために鋭意研究したところ、安価な丸棒や角鋼棒からなる係止具や該係止具に勘合する中空棒を耐火仕切材の固定具として用い、更に前記耐火仕切材上面を固着具でビス固定することによって、耐火仕切材の位置がずれないように固定した後に耐熱シール材１０で耐火仕切材とケーブルとの間の隙間を充填することによって密封状態に出来る新規な建物ケーブル貫通部の防火構造工法及び防火構造自体を提供するものである。 The present inventor has intensively studied to solve the problems to be applied, and uses an inexpensive round bar or square steel bar locking tool or a hollow bar fitted to the locking tool as a fireproof partition fixture, and further By fixing the upper surface of the refractory partition material with screws, the refractory partition material is fixed so that the position of the refractory partition material does not shift, and then the space between the refractory partition material and the cable is filled with the heat-resistant sealing material 10 to achieve a sealed state The present invention provides a fire prevention structure construction method for a new building cable penetration and a fire prevention structure itself.

すなわち本発明の第一は、構造物の壁又は床壁の貫通孔内に貫通する複数のケーブルをケーブルラックで囲みながら収容した状態で、上記貫通孔の開口部とケーブルラックとの間を耐火材で遮蔽するケーブル貫通部の防火構造工法において、
複数のケーブル３が貫通している壁スラブ１８又は床スラブ１に設けられた開口部２に合わせて切断した耐火仕切材９を、ケーブル３を挟持しながら開口部２全体に充填するか、又はケーブル３を挟持しながら開口部幅より大きく切断して被覆する第一工程と、
前記耐火仕切材９とケーブル３との接触面又は隙間に、充填材を充填する第二工程と、必要において、前記ケーブル３の任意幅に延焼防止剤１２を塗布する第三工程と、
からなることを特徴とする建物ケーブル貫通部の防火構造工法である。 That is, in the first aspect of the present invention, a fireproof is provided between the opening of the through-hole and the cable rack in a state where a plurality of cables penetrating into the through-hole of the structure wall or the floor wall are enclosed with the cable rack. In the fire prevention structure method of the cable penetration part shielded by the material,
Fill the entire opening 2 while holding the cable 3 with the fireproof partition 9 cut in accordance with the opening 2 provided in the wall slab 18 or the floor slab 1 through which the plurality of cables 3 pass, or A first step of cutting and covering larger than the opening width while holding the cable 3;
A second step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler, and a third step of applying a fire spreader 12 to an arbitrary width of the cable 3, if necessary,
It is a fire prevention structure construction method of a building cable penetration part characterized by comprising.

本発明の第二は、構造物の壁又は床壁の貫通孔内に貫通する複数のケーブルをケーブルラックで囲みながら収容した状態で、上記貫通孔の開口部とケーブルラックとの間を耐火材で遮蔽するケーブル貫通部の防火構造工法において、
複数のケーブル３が貫通している壁スラブ１８又は床スラブ１に設けられた開口部２に、貫通枠５又は固着具１４を設定する第一工程と、
前記開口部２に合わせて切断した耐火仕切材９を、前記貫通枠５内のケーブル３を挟持しながら充填し、又は開口部幅より大きく切断して固定具１４上にケーブル３を挟持しながら被覆する第二工程と、
前記耐火仕切材９とケーブル３との接触面又は隙間に、充填材を充填する第三工程と、必要において、前記ケーブル３の任意幅に延焼防止剤１２を塗布する第四工程と、
からなることを特徴とする建物ケーブル貫通部の防火構造工法である。 The second of the present invention is a fireproof material between the opening of the through hole and the cable rack in a state where a plurality of cables penetrating into the through hole of the structure wall or floor wall are enclosed by the cable rack. In the fire prevention structure method of the cable penetration part shielded with
A first step of setting the penetrating frame 5 or the fastener 14 in the opening 2 provided in the wall slab 18 or the floor slab 1 through which the plurality of cables 3 penetrate;
Fill the refractory partition material 9 cut in accordance with the opening 2 while sandwiching the cable 3 in the through frame 5, or cut larger than the width of the opening and sandwich the cable 3 on the fixture 14. A second step of coating;
A third step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler; and a fourth step of applying a fire spreader 12 to an arbitrary width of the cable 3 if necessary;
It is a fire prevention structure construction method of a building cable penetration part characterized by comprising.

本発明の第三は、構造物の床壁の貫通孔内に貫通する複数のケーブルをケーブルラックで囲みながら収容した状態で、上記貫通孔の開口部とケーブルラックとの間を耐火材で遮蔽するケーブル貫通部の防火構造工法において、
複数のケーブル３が貫通している床スラブ１に設けられた開口部２に、床スラブ面と同一面に貫通枠５の上部が位置するように設定する第一工程と、
該貫通枠５の端部から折り曲げ部を有する係止部材１０と係止部材１０の大きさに合わせて所定の長さに調整される支持部材１１とからなる固定具３を、前記ケーブル３を直行するように囲んだケーブルラック４の幅方向に並列に設置する第二工程と、
前記開口部２の大きさに合わせて切断した耐火仕切材９を、ケーブル３を挟持しながら開口部２全体に充填する第三工程と、
第三工程で充填した耐火仕切材９の上面に、複数の固着具１４を固定する第四工程と、前記耐火仕切材９とケーブル３との接触面又は隙間に、充填材を充填する第五工程と、必要において、前記ケーブル３の任意幅に延焼防止剤１２を塗布する第六工程と、
からなることを特徴とする建物ケーブル貫通部の防火構造工法である。 According to a third aspect of the present invention, a plurality of cables penetrating into the through holes of the floor wall of the structure are accommodated while being surrounded by the cable rack, and the space between the opening of the through hole and the cable rack is shielded with a refractory material. In the fire prevention structure method of the cable penetration part to
A first step of setting the opening 2 provided in the floor slab 1 through which the plurality of cables 3 pass so that the upper portion of the through frame 5 is located on the same plane as the floor slab surface;
The fixing member 3 including a locking member 10 having a bent portion from an end portion of the through frame 5 and a support member 11 adjusted to a predetermined length according to the size of the locking member 10, the cable 3 A second step of installing in parallel in the width direction of the cable rack 4 enclosed so as to be orthogonal;
A third step of filling the entire opening 2 while holding the cable 3 with the fireproof partitioning material 9 cut according to the size of the opening 2;
A fourth step of fixing a plurality of fixing members 14 on the upper surface of the fireproof partitioning material 9 filled in the third step; and a fifth step of filling the contact surface or gap between the fireproof partitioning material 9 and the cable 3 with a filler. A sixth step of applying a fire spreader 12 to an arbitrary width of the cable 3, if necessary,
It is a fire prevention structure construction method of a building cable penetration part characterized by comprising.

本発明の第四は、構造物の壁壁の貫通孔内に貫通する複数のケーブルをケーブルラックで囲みながら収容した状態で、上記貫通孔の開口部とケーブルラックとの間を耐火材で遮蔽するケーブル貫通部の防火構造工法において、
複数のケーブル３が貫通している壁スラブ１８に設けられた開口部２に、該開口部２の端部から角鋼製中空管からなる支持部材と該中空管に端部を挿入し、他端は平鋼となっている取付部とから成る固着具１４を前記ケーブル３を直行するように囲んだケーブルラック４の幅方向に並列に設置する第一工程と、
前記開口部２の大きさに合わせて切断した耐火仕切材９を、前記固着具１４の上部にケーブル３を挟持しながら取付ける第二工程と、
第二工程で取付けた耐火仕切材９の上部に、折り曲げ部を有する係止部材１０と係止部材１０の大きさに合わせて所定の長さに調整される支持部材１１とからなる固定具３を載置して、前記係止部材１０の端部を壁スラブ１８に固定する第三工程と、
前記耐火仕切材９とケーブル３との接触面又は隙間に、充填材を充填する第四工程と、必要において、前記ケーブル３の任意幅に延焼防止剤１２を塗布する第五工程と、
からなることを特徴とする建物ケーブル貫通部の防火構造工法である。 According to a fourth aspect of the present invention, a plurality of cables penetrating into the through-holes of the wall of the structure are accommodated while being enclosed by the cable rack, and the openings between the through-holes and the cable rack are shielded with a refractory material. In the fire prevention structure method of the cable penetration part to
A support member made of a square steel hollow tube is inserted into an opening 2 provided in a wall slab 18 through which a plurality of cables 3 penetrates, and an end is inserted into the hollow tube from the end of the opening 2. A first step of installing in parallel the width direction of the cable rack 4 surrounding the cable 3 so that the fixing device 14 composed of a mounting portion whose other end is a flat steel is orthogonal;
A second step of attaching the fireproof partitioning material 9 cut in accordance with the size of the opening 2 while holding the cable 3 to the upper part of the fixing tool 14;
A fixture 3 comprising a locking member 10 having a bent portion and a support member 11 adjusted to a predetermined length according to the size of the locking member 10 on the upper part of the fireproof partition 9 attached in the second step. A third step of fixing the end of the locking member 10 to the wall slab 18;
A fourth step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler; and a fifth step of applying a fire spread inhibitor 12 to an arbitrary width of the cable 3 if necessary;
It is a fire prevention structure construction method of a building cable penetration part characterized by comprising.

本発明の第五は、前記充填材は、耐火仕切材端材や耐熱シール材１０を単独で、又は組み合わせて用いることを特徴とする請求項１〜４記載の建物ケーブル貫通部の防火構造工法である。 The fifth aspect of the present invention is the building cable penetration part fire-proofing construction method according to claim 1, wherein the filler is a fireproof partition material end material or a heat-resistant sealing material 10 singly or in combination. It is.

本発明の第六は、前記固定具３は、端部に取付孔を設けた折り曲げ部を有する丸鋼棒或いは角鋼棒からなる係止部材１０と、該係止部材１０に嵌合して長さ調整可能な空間部を有する支持部材１１から構成されることを特徴とする請求項２〜４記載の建物ケーブル貫通部の防火構造工法である。 According to a sixth aspect of the present invention, the fixture 3 includes a locking member 10 made of a round steel bar or a square steel bar having a bent portion provided with an attachment hole at an end thereof, and is fitted to the locking member 10 and is long. It is comprised from the supporting member 11 which has the space part which can be adjusted, It is a fireproof structure construction method of the building cable penetration part of Claims 2-4 characterized by the above-mentioned.

本発明の第七は、前記固着具１４は、端部に取付孔を設けた丸鋼棒或いは角鋼棒からなる係止部材と、該係止部材に嵌合して長さ調整可能な空間部を有する支持部材から構成されることを特徴とする請求項２〜４記載の建物ケーブル貫通部の防火構造工法である。 According to a seventh aspect of the present invention, the fixing tool 14 includes a locking member made of a round steel bar or a square steel bar provided with an attachment hole at an end portion, and a space portion that is fitted to the locking member and can be adjusted in length. It is comprised from the supporting member which has this, It is a fire prevention structure construction method of the building cable penetration part of Claims 2-4 characterized by the above-mentioned.

本発明の第八は、構造物の壁又は床壁の貫通孔内に貫通する複数のケーブルをケーブルラックで囲みながら収容した状態で、上記貫通孔の開口部とケーブルラックとの間を耐火材で遮蔽するケーブル貫通部の防火構造において、
複数のケーブル３が貫通している床スラブ１に設けられた開口部２に、必要において設けられる貫通枠５と、
折り曲げ部を有する係止部材１０と該係止部材１０の大きさに合わせて所定の長さに調整される支持部材１１とからなる固定具３と、
前記ケーブルの位置を調整するケーブルラック４と、
前記開口部２の大きさに合わせて充填する耐火仕切材９と、
耐火仕切材９を固定する固着材と、
前記耐火仕切材９とケーブル３との隙間を充填する充填材と、
前記ケーブル３の任意幅に塗布する延焼防止剤１２と、
から構成されることを特徴とする建物ケーブル貫通部の防火構造である。 According to an eighth aspect of the present invention, there is provided a refractory material between the opening of the through hole and the cable rack in a state in which a plurality of cables penetrating into the through hole of the structure wall or floor wall are enclosed by the cable rack. In the fire prevention structure of the cable penetration part shielded with
A through frame 5 provided where necessary in an opening 2 provided in a floor slab 1 through which a plurality of cables 3 penetrate;
A fixture 3 comprising a locking member 10 having a bent portion and a support member 11 adjusted to a predetermined length according to the size of the locking member 10;
A cable rack 4 for adjusting the position of the cable;
Refractory partitioning material 9 filled in accordance with the size of the opening 2;
A fixing material for fixing the fireproof partition material 9;
A filler for filling a gap between the fireproof partition 9 and the cable 3;
A fire spreader 12 applied to an arbitrary width of the cable 3;
It is a fire prevention structure of a building cable penetration part characterized by comprising.

本発明の防火構造は、床面や壁面の端部から固定具３を設置した上に耐火仕切材９をケーブル３を囲むように充填し、あるいは床面や壁面に耐火仕切材を載置して固着材で取付け、更にこれらの隙間に耐熱シール材１０を充填するだけで耐熱性や防火性に優れた防火構造を得ることができ、従来品のように耐火仕切材を複数段必要としないため安価に製造可能なものである。 In the fire prevention structure of the present invention, the fixture 3 is installed from the end of the floor or wall and the fire barrier partition 9 is filled so as to surround the cable 3, or the fire barrier is placed on the floor or wall. It is possible to obtain a fire-proof structure excellent in heat resistance and fire resistance simply by filling the gaps with the heat-resistant sealing material 10 and not needing multiple stages of fire-resistant partition materials unlike conventional products. Therefore, it can be manufactured at low cost.

本発明の防火構造は、従来のように多数のロックウール等の耐熱材を用いなく、また圧縮されたロックウールの仕切り板表面には延焼防止材が塗布されているために、作業者が繊維質のウールを体内に吸収することは少なく安全である。 The fire-proof structure of the present invention does not use a large number of heat-resistant materials such as rock wool as in the prior art, and the fire spread preventing material is applied to the surface of the partition wall of the compressed rock wool. It is safe to absorb quality wool in the body.

本発明の防火構造は、上記のように従来構造に比較すると簡易な構造であるが、新しい日本建築センターで指定する１時間の耐火試験に十分に対応可能な構造を有するものである。 As described above, the fire prevention structure of the present invention is a simple structure as compared with the conventional structure, but has a structure that can sufficiently cope with the one-hour fire resistance test specified in the new Japan Building Center.

以下、図面を参照して本発明を詳細に説明するが、本発明の範囲はこれらに限定されるものではない。 Hereinafter, the present invention will be described in detail with reference to the drawings, but the scope of the present invention is not limited thereto.

図１及び図２は、床ケーブル貫通部における防火構造を示す断面図と平面図である。 FIG.1 and FIG.2 is sectional drawing and a top view which show the fire prevention structure in a floor cable penetration part.

床スラブ１に設けられた開口部２を貫通する複数のケーブル３を密封充填して防火構造とする場合、先ず開口部２を覆う大きさに耐火仕切材９を切断して、ケーブル３及びケーブルラック４を挟持するように前記耐火仕切材９を２分割して床スラブ１上に載置する（第一工程）。 When a plurality of cables 3 penetrating through the opening 2 provided in the floor slab 1 are hermetically filled to form a fireproof structure, the fireproof partition 9 is first cut to a size that covers the opening 2, and the cable 3 and the cable The fireproof partitioning material 9 is divided into two so as to sandwich the rack 4 and placed on the floor slab 1 (first step).

この場合、先ず耐火仕切材９を開口部の縦・横の長さに合わせて覆う大きさに切断した後に、先に設置したケーブルラック４を囲むように凹凸形状に切断することが好ましい。 In this case, it is preferable to first cut the fireproof partitioning material 9 into a size that covers the length and width of the opening, and then cut into a concavo-convex shape so as to surround the previously installed cable rack 4.

凹凸形状に切断された凹状仕切材は、床スラブ１の端部に載置され、且つ、ケーブラック４の外側に沿って開口部との間に押し込められ、一方の凸状仕切材の方はそのままではケーブル３及びケーブルラック４の先端部と重なり合うために、重なり合わないように予めケーブル３及びケーブルラック４の先端部の形状に切断した後に、同様に床スラブ１の上に位置し、且つ、ケーブラック４の内側に沿って開口部との間に載置した。 The concave partition material cut into the concavo-convex shape is placed on the end of the floor slab 1 and pushed into the opening along the outer side of the black slab 4, and one convex partition material is Since it overlaps with the tip part of the cable 3 and the cable rack 4 as it is, after cutting into the shape of the tip part of the cable 3 and the cable rack 4 in advance so as not to overlap, it is similarly positioned on the floor slab 1 and It was placed between the openings along the inside of the Kerr Black 4.

上記耐火仕切材９としては、ロックウールを２００ｋｇ/ｍ^３の圧力で圧縮した厚みが５０ｍｍの板に、水酸化アルミニウム、三酸化アンチモン、アクリルポリマー等の延焼防止剤１２を約１ｍｍ厚に塗布したした素材を用いたが、本発明に使用できる耐火仕切材９は、延焼防止効果を有し簡単に切断できる素材であれば全て応用できるものである。 As the fireproof partition material 9, a fire spreader 12 such as aluminum hydroxide, antimony trioxide, acrylic polymer, etc., was applied to a thickness of about 1 mm on a plate having a thickness of 50 mm obtained by compressing rock wool at a pressure of 200 kg / m ³ . The fireproof partitioning material 9 that can be used in the present invention can be applied to any material that has an effect of preventing fire spread and can be easily cut.

次いで図２に示されるように、ケーブル３及びケーブルラック４と耐火仕切材９との隙間に耐熱シール材１０７を充填する（第二工程）。 Next, as shown in FIG. 2, the heat-resistant sealing material 107 is filled in the gaps between the cable 3 and the cable rack 4 and the fireproof partition material 9 (second process).

本発明で使用する耐熱シール材１０は、上記水酸化アルミニウム、三酸化アンチモン、アクリルポリマー等の延焼防止剤１２にロックウールチップとを混合した粒土状のものが好ましいが、本発明に使用できる耐熱シール材１０は、延焼防止効果を有し、簡単に充填可能なペースト素材であれば全て応用できるものである。 The heat-resistant sealing material 10 used in the present invention is preferably a grain-like material in which rock wool chips are mixed with the fire spread inhibitor 12 such as aluminum hydroxide, antimony trioxide, acrylic polymer, etc., but can be used in the present invention. The heat-resistant sealing material 10 can be applied to any paste material that has a fire spread preventing effect and can be easily filled.

図３及び図４は、床面、特に水止めを兼ねた床ケーブル貫通部における防火構造を示す断面図と平面図である。 3 and 4 are a cross-sectional view and a plan view showing a fire prevention structure in the floor surface, in particular, a floor cable penetrating portion also serving as a water stopper.

複数のケーブル３が貫通している床スラブ１に設けられた開口部２に、該開口部２の側端部に端部が平鋼材からなる係止部材７と係止部材７の大きさに合わせて所定の長さに調整される角鋼製の支持部材８とからなる固定具６を、前記ケーブル３を直行するように囲んだケーブルラック４の横幅方向に並列に設置する（第一工程）。 In the opening 2 provided in the floor slab 1 through which the plurality of cables 3 pass, the size of the locking member 7 and the locking member 7 are made of a flat steel material at the side end of the opening 2. In addition, a fixture 6 comprising a square steel support member 8 adjusted to a predetermined length is installed in parallel in the lateral width direction of the cable rack 4 that surrounds the cable 3 so as to go straight (first step). ).

次いで、前記開口部２の大きさより大きく切断した耐火仕切材９を、前記固定具６の上に載置して開口部２全体を覆うようにした（第二工程）が、この場合、この場合、先ず耐火仕切材９を開口部の縦・横の長さより大きく切断した後に、先に設置したケーブルラック４を囲むように凹凸形状に切断した。 Next, the refractory partition material 9 cut larger than the size of the opening 2 is placed on the fixture 6 so as to cover the entire opening 2 (second step). First, the fireproof partition material 9 was cut to be larger than the vertical and horizontal lengths of the opening, and then cut into a concavo-convex shape so as to surround the previously installed cable rack 4.

凹凸形状に切断された凹状仕切材を、縦方向で固定具６の上に載置し、且つ、ケーブラック４の外側に沿って開口部を覆うようにし、一方の凸状仕切材の方も縦方向で覆うようにした場合に、ケーブル３及びケーブルラック４の先端部と重なり合うために、重なり合わないように予めケーブル３及びケーブルラック４の先端部の形状に切断した後に、同様に固定具６の上に位置し、且つ、ケーブラック４の内側に沿って開口部との間に載置した。 The concave partition material cut into the concavo-convex shape is placed on the fixture 6 in the vertical direction and covers the opening along the outer side of the cae black 4, and one convex partition material is also In the case where it is covered in the vertical direction, it overlaps with the end portions of the cable 3 and the cable rack 4, so that it is cut in the shape of the end portion of the cable 3 and the cable rack 4 in advance so as not to overlap. 6 and was placed between the opening along the inner side of the black 4.

上記耐火仕切材９としては、上記同様にロックウールを２００ｋｇ/ｍ^３の圧力で圧縮した厚みが５０ｍｍの板に、水酸化アルミニウム、三酸化アンチモン、アクリルポリマー等の延焼防止剤１２を約１ｍｍ厚に塗布したした素材を用いた。 As the refractory partition material 9, a fire spreader 12 such as aluminum hydroxide, antimony trioxide, acrylic polymer, etc. is about 1 mm thick on a plate having a thickness of 50 mm obtained by compressing rock wool at a pressure of 200 kg / m ³ as described above. The material applied to was used.

第二工程で充填した耐火仕切材９表面を平らにした後の端部に、複数の端部が平鋼材からなり折り曲げ部を有する係止部材１４と該係止部材１４の大きさに合わせて所定の長さに調整される角鋼製の支持部材１５とからなる固着具１３で押えながら端部をピアスビス１７で固定した（第三工程）が、上記固着具１３の押さえにより耐火仕切材４は、前記角鋼製の固定具６との間に固定されるようになる。 At the end after the surface of the refractory partitioning material 9 filled in the second step is flattened, a plurality of ends are made of flat steel material and have bent portions, and the size of the locking member 14 is adjusted. The end portion was fixed with a piercing screw 17 while being pressed by a fixing tool 13 comprising a square steel support member 15 adjusted to a predetermined length (third step). Is fixed between the bracket 6 made of square steel.

最後に、前記耐火仕切材９とケーブル３、或いはケーブルラック４との間に隙間が生ずるために、耐火仕切材端材１１を先に充填し、次いで、その上から耐熱シール材１０を充填して、上下室等からの延焼を防止するようにしている（第四工程）。 Finally, in order to create a gap between the fireproof partition material 9 and the cable 3 or the cable rack 4, the fireproof partition material end material 11 is filled first, and then the heat resistant seal material 10 is filled thereon. Thus, the spread of fire from the upper and lower chambers is prevented (fourth step).

さらに延焼防止剤１２を耐火仕切材９の上面に出ているケーブル３の表面に一例として約１５ｃｍ塗布して、ケーブル３自体の延焼を防止する様に二重の延焼対策をとっている。 Furthermore, the fire spreader 12 is applied as an example to the surface of the cable 3 on the upper surface of the fireproof partitioning material 9 by about 15 cm, and a double fire spread measure is taken to prevent the cable 3 itself from spreading.

本発明で使用する延焼防止剤１２は、水酸化アルミニウム、三酸化アンチモン、アクリルポリマー等の延焼防止剤１２を用いた。 As the fire spread inhibitor 12 used in the present invention, a fire spread inhibitor 12 such as aluminum hydroxide, antimony trioxide, acrylic polymer or the like was used.

本実施例２では、耐火仕切材４の幅を開口部２より大きく切り取って開口部２を覆う形状としたが、開口部２と同じ幅の耐火仕切材４の場合には、貫通枠５を通過するように端部が平鋼材からなる係止部材７と係止部材７の大きさに合わせて所定の長さに調整される角鋼製の支持部材８とからなる固定具６を、前記ケーブル３を直行するように囲んだケーブルラック４の横幅方向に並列に設置し（第一工程）、次いで、前記開口部２の大きさと同じ幅に切断した耐火仕切材９を、前記固定具６の上に載置して貫通枠５内にはめ込んだ（第二工程）以外は、実施例２と同様な工程で所望の床ケーブル貫通部における防火構造を得ることができる。 In the second embodiment, the width of the fireproof partition material 4 is cut out larger than the opening 2 to cover the opening 2. However, in the case of the fireproof partition 4 having the same width as the opening 2, the through frame 5 is provided. A fixing member 6 comprising a locking member 7 having an end portion made of a flat steel material so as to pass through and a support member 8 made of square steel adjusted to a predetermined length according to the size of the locking member 7, The cable rack 4 enclosed so as to be orthogonal to the cable 3 is installed in parallel in the lateral width direction (first step), and then the fireproof partition 9 cut to the same width as the opening 2 is attached to the fixture 6. A desired fireproof structure in the floor cable penetrating portion can be obtained in the same process as in Example 2 except that the sheet is placed on the wall and fitted in the through frame 5 (second step).

また本実施例の応用として、貫通枠５を設けてた後に該貫通枠５端部に接触するように端部が平鋼からなる折り曲げ部を有する係止部１４を重ね、この係止部両端に角鋼製の支持部を挿通させた固着具１３を、前記ケーブル３を直行するように囲んだケーブルラック４の横幅方向に並列に設置し（第一工程）、次いで、前記開口部２の大きさと同じ幅に切断した耐火仕切材９を、前記固定具６の上に載置して貫通枠５内にはめ込み（第二工程）、上金具ととして端部が平鋼材からなる係止部材７と係止部材７の大きさに合わせて所定の長さに調整される角鋼製の支持部材８とからなる固定具６をを用いることなく、実施例２と同様な工程で所望の床ケーブル貫通部における防火構造を得ることができる。 Further, as an application of this embodiment, after the through frame 5 is provided, a latching portion 14 having a bent portion made of flat steel is overlapped so as to contact the end of the through frame 5, A fixing tool 13 in which a square steel support portion is inserted is installed in parallel in the width direction of the cable rack 4 surrounded so as to go straight through the cable 3 (first step), and then the opening 2 A fire-resistant partitioning material 9 cut to the same width as the size is placed on the fixture 6 and fitted into the through frame 5 (second step), and a locking member whose end is made of a flat steel material as an upper metal fitting. 7 and the desired floor in the same process as in Example 2 without using the fixture 6 comprising the support member 8 made of square steel adjusted to a predetermined length according to the size of the locking member 7. A fireproof structure in the cable penetration part can be obtained.

図５及び図６は、床ケーブル貫通部における防火構造を示す断面図と平面図である。 FIG.5 and FIG.6 is sectional drawing and a top view which show the fire prevention structure in a floor cable penetration part.

複数のケーブル３が貫通している床スラブ１に設けられた開口部２に、該開口部２の端部から端部が平鋼材からなる係止部材７と係止部材７の大きさに合わせて所定の長さに調整される角鋼製の支持部材８とからなる固定具６を、前記ケーブル３を直行するように囲んだケーブルラック４の横幅方向に並列に設置する（第一工程）。 In the opening 2 provided in the floor slab 1 through which the plurality of cables 3 pass, the end of the opening 2 is matched to the size of the engaging member 7 and the engaging member 7 made of flat steel. A fixing tool 6 comprising a square steel support member 8 adjusted to a predetermined length is installed in parallel in the width direction of the cable rack 4 enclosed so as to go straight to the cable 3 (first step). .

凹凸形状に切断された凹状仕切材を、縦方向で固定具６の上に載置し、且つ、ケーブラック４の外側に沿って開口部を覆うようにし、一方の凸状仕切材の方も縦方向で覆うようにした場合に、ケーブル３及びケーブルラック４の先端部と重なり合うために、重なり合わないように予めケーブル３及びケーブルラック４の先端部の形状に切断した後に、同様に固着具１４の上に位置し、且つ、ケーブラック４の内側に沿って開口部との間に載置した。 The concave partition material cut into the concavo-convex shape is placed on the fixture 6 in the vertical direction and covers the opening along the outer side of the cae black 4, and one convex partition material is also In the case where it is covered in the vertical direction, in order to overlap with the tip portions of the cable 3 and the cable rack 4, it is cut in the shape of the tip portion of the cable 3 and the cable rack 4 in advance so as not to overlap, and similarly 14 and was placed between the openings along the inner side of the black 4.

第二工程で充填した耐火仕切材９表面を平らにした後の端部に、端部が平鋼材からなり折り曲げ部を有する係止部材１４と該係止部材１４の大きさに合わせて所定の長さに調整される角鋼製の支持部材１５とからなる複数の固着具１３で押えながら端部をピアスビス１７で固定した（第三工程）が、上記固着具の押さえにより耐火仕切材４は、前記角鋼製の固着具１３との間に固定されるようになる。 In the end portion after flattening the surface of the refractory partitioning material 9 filled in the second step, the end portion is made of a flat steel material and has a bent portion and a predetermined size according to the size of the locking member 14. The end portion was fixed with a pierce screw 17 while being pressed by a plurality of fixing tools 13 composed of a square steel support member 15 adjusted to the length (third step). , And is fixed between the square steel fixing tool 13.

最後に、前記耐火仕切材９とケーブル３、或いはケーブルラック４との間に隙間が生ずるために、耐火仕切材端材を先に充填し、次いで、その上から耐熱シール材１０を充填して、上下室等からの延焼を防止するようにしている（第四工程）。 Finally, since a gap is generated between the fireproof partition material 9 and the cable 3 or the cable rack 4, the fireproof partition material end material is filled first, and then the heat resistant sealant 10 is filled from above. The fire spread from the upper and lower chambers is prevented (fourth step).

さらに延焼防止剤１２を耐火仕切材の上面に出ているケーブル３の表面に一例として約１５ｃｍ塗布して、ケーブル３自体の延焼を防止する様に二重の延焼対策をとっている。 Further, as an example, about 15 cm of the fire spreader 12 is applied to the surface of the cable 3 protruding from the upper surface of the fireproof partition material, so as to prevent the spread of the cable 3 itself.

図７及び図８は、壁面における壁床ケーブル貫通部における防火構造を示す断面図と平面図である。 7 and 8 are a cross-sectional view and a plan view showing a fire prevention structure in the wall floor cable penetration portion on the wall surface.

壁スラブ１８の開口部２に嵌合する貫通枠５を用いないで図５に示されるように端部が平鋼からなる角鋼製棒の係止部材７と、該係止部材７の外形より大きく、内部が中空形状である角鋼製の支持部８からなる固定具６を、前記壁スラブ１８と同一面においてケーブル３を直行するように囲んだケーブルラック４の幅方向に並列に設置する（第一工程）。 Without using the penetrating frame 5 that fits into the opening 2 of the wall slab 18, as shown in FIG. 5, a locking member 7 of a square steel bar whose end is made of flat steel, and the outer shape of the locking member 7 A larger fixture 6 comprising a square steel support portion 8 having a hollow shape is installed in parallel in the width direction of the cable rack 4 which is surrounded by the cable 3 on the same plane as the wall slab 18. (First step).

次いで、前記開口部２より大ききく切断した耐火仕切材９を、前記固定具６の上に掛かるようにしながら開口部２の上を覆うように取付ける（第二工程）が、この場合、先ず耐火仕切材９を開口部の縦・横の長さより大きく切断した後に、先に設置したケーブルラック４を囲むように凹凸形状に切断することが好ましい。 Next, the fireproof partition material 9 cut larger than the opening 2 is attached so as to cover the top of the opening 2 while hanging on the fixture 6 (second step). It is preferable to cut the partition material 9 into a concavo-convex shape so as to surround the previously installed cable rack 4 after cutting the partition material 9 to be larger than the length and width of the opening.

凹凸形状に切断された凹状仕切材は、固定具６の上に位置し、且つ、ケーブラック４の外側に沿って開口部２の上に取付けられ、一方の凸状仕切材の方はそのままではケーブル３及びケーブルラック４の先端部と重なり合うために、重なり合わないように予めケーブル３及びケーブルラック４の先端部の形状に切断した後に、同様に固定具６の上に取付け、且つ、ケーブラック４の内側に沿って開口部との間に取付けた。 The concave partition material cut into the concavo-convex shape is positioned on the fixture 6 and attached to the opening 2 along the outer side of the cage black 4, and one convex partition material is left as it is. In order to overlap with the front ends of the cable 3 and the cable rack 4, it is cut in the shape of the front end of the cable 3 and the cable rack 4 in advance so as not to overlap, and is similarly mounted on the fixture 6, and 4 was attached between the openings along the inside.

第二工程で取付けた耐火仕切材９表面を平らにした後に、端部が横８ｍｍ、縦４ｍｍからなる平鋼材で折り曲げ部を有する係止部材１４と該係止部材１４の大きさに合わせて所定の長さに調整される角鋼製の支持部材１５とからなる複数の固着具１３で押えながら端部をピアスビス１７で固定した（第三工程）が、上記固着具の押さえにより耐火仕切材４は、前記角鋼製の固着具１３との間に固定されるようになり開口部からの落剥は生じない。 After flattening the surface of the fireproof partition 9 attached in the second step, the locking member 14 having a bent portion made of a flat steel material having an end of 8 mm in width and 4 mm in length, and the size of the locking member 14 are adjusted. The ends were fixed with pierce screws 17 while being held down by a plurality of fixing members 13 made of square steel support members 15 adjusted to a predetermined length (third step). No. 4 is fixed between the square steel fixture 13 and does not peel off from the opening.

次いで、前記耐火仕切材９とケーブル３、或いはケーブルラック４との間の接触面又は隙間に、耐火仕切板端材１１と耐熱シール材１０を充填して、階下からの延焼を防止するようにしている（第四工程）。 Next, the contact surface or gap between the fireproof partition material 9 and the cable 3 or the cable rack 4 is filled with a fireproof partition plate end material 11 and a heat resistant seal material 10 to prevent the spread of fire from the downstairs. (4th process).

本実施例の他の応用として、壁スラブ１８の開口部２に嵌合する貫通枠５を用いないで端部が平鋼からなる折り曲げ部を有する係止部１４を壁スラブに取付け金具で固定した後に、この係止部両端に角鋼製の支持部を挿通させた固着具１３を、前記ケーブル３を直行するように囲んだケーブルラック４の横幅方向に並列に設置し（第一工程）、次いで、前記開口部２の大きさと同じ幅に切断した耐火仕切材９を、前記固定具６の上に載置して貫通枠５内にはめ込み（第二工程）、上金具ととして端部が平鋼材からなる係止部材７と係止部材７の大きさに合わせて所定の長さに調整される角鋼製の支持部材８とからなる固定具６をを用いて耐火仕切材を固着し、実施例４と同様な工程で所望の床ケーブル貫通部における防火構造を得ることができる。 As another application of the present embodiment, the engaging portion 14 having a bent portion made of flat steel at the end is fixed to the wall slab with a mounting bracket without using the through frame 5 fitted into the opening 2 of the wall slab 18. After that, the fixing tool 13 in which square steel support portions are inserted at both ends of the locking portion is installed in parallel in the width direction of the cable rack 4 that surrounds the cable 3 so as to go straight (first step). Next, the fireproof partition material 9 cut to the same width as the size of the opening 2 is placed on the fixture 6 and fitted into the through frame 5 (second step), and the end as an upper metal fitting. The fireproof partition material is fixed using a fixing member 6 comprising a locking member 7 made of flat steel and a square steel support member 8 adjusted to a predetermined length according to the size of the locking member 7. Thus, a desired fireproof structure in the floor cable penetration can be obtained by the same process as in Example 4. That.

なお、上記実施例１〜４では、延焼防止剤１２を耐火仕切材９の上方に塗布したが、この延焼防止剤１２は、耐火仕切端材や耐熱シールを用いる箇所に代えて塗布しても良いことを確認している。 In Examples 1 to 4, the fire spread inhibitor 12 was applied above the fireproof partition material 9, but this fire spread inhibitor 12 may be applied in place of a place using a fireproof partition end material or a heat resistant seal. Make sure it is good.

図９は、本発明で使用する固定具６を示す斜視図である。本発明の固定具６は、端部が平鋼材からなる固定具用係止部材７と該係止部材７を挿通する中空形状の角型鋼材からなる固定具用支持部材８とから組み合わされているが、端部には取付け金具１６を取付けるための小孔が設けられており、スラブ面に直接端部を固定する場合にはピアスビス１７を打ち込んで固定する。 FIG. 9 is a perspective view showing the fixture 6 used in the present invention. The fixture 6 of the present invention is combined with a fixture locking member 7 whose end is made of a flat steel material and a fixture support member 8 made of a hollow square steel material that is inserted through the locking member 7. However, a small hole for attaching the mounting bracket 16 is provided at the end, and when the end is directly fixed to the slab surface, a pierce screw 17 is driven and fixed.

図１０は、本発明で使用する固着具１３を示す斜視図である。本発明の固着具１３は、端部が平鋼材からなる折り曲げ部を有する固着具用係止部材１４と該係止部材１４を挿通する中空形状の角型鋼材からなる固着用支持部材１５とから組み合わされているが、端部には取付け金具１６を取付けるための小孔が設けられており、スラブ面に直接端部を固定する場合にはピアスビス１７を打ち込んで固定する。 FIG. 10 is a perspective view showing the fixing tool 13 used in the present invention. The fixing tool 13 of the present invention includes a fixing member locking member 14 having a bent portion whose end is made of a flat steel material, and a fixing support member 15 made of a hollow square steel material that passes through the locking member 14. Although they are combined, a small hole for attaching the mounting bracket 16 is provided at the end, and when the end is directly fixed to the slab surface, a pierce screw 17 is driven and fixed.

上記図９及び図１０ではどちらも角鋼製の係止部材と支持部材とを用いたが、これは双方が挿通可能であって端部に打ち込みようの小孔があれば丸棒製で合っても構わない。 9 and 10 both use a square steel locking member and a support member, but this is made of a round bar if both can be inserted and there is a small hole to be driven into the end. It doesn't matter.

本発明における床防火構造を示す断面図である。It is sectional drawing which shows the floor fire prevention structure in this invention. 図１における平面図である。It is a top view in FIG. 床防火構造における他の構造を示す断面図である。It is sectional drawing which shows the other structure in a floor fire prevention structure. 図３における平面図である。It is a top view in FIG. 床防火構造における他の構造を示す断面図である。It is sectional drawing which shows the other structure in a floor fire prevention structure. 図５における平面図である。It is a top view in FIG. 本発明における壁防火構造を示す断面図である。It is sectional drawing which shows the wall fire prevention structure in this invention. 図７における平面図である。It is a top view in FIG. 本発明で使用する固定具を示す斜視図である。It is a perspective view which shows the fixing tool used by this invention. 本発明で使用する固着具を示す斜視図である。It is a perspective view which shows the fixing tool used by this invention.

Explanation of symbols

１・・・床スラブ
２・・・開口部
３・・・ケーブル
４・・・ケーブルラック
５・・・貫通枠
６・・・固定具
７・・・固定具用係止部材
８・・・固定具用支持部材
９・・・耐火仕切材
１０・・耐熱シール材
１１・・耐火仕切材端材
１２・・延焼防止剤
１３・・固着具
１４・・固着具用係止部材
１５・・固着具用支持部材
１６・・取付け金具
１７・・ビス
１８・・壁スラブ DESCRIPTION OF SYMBOLS 1 ... Floor slab 2 ... Opening part 3 ... Cable 4 ... Cable rack 5 ... Through frame 6 ... Fixing tool 7 ... Fixing member locking member 8 ... Fixing Supporting member 9 for the tool: Fireproof partitioning material 10: Heat-resistant sealing material 11, Fireproof partitioning material end material 12, Fire spreader 13, Fixing tool 14, Fixing tool locking member 15, Fixing tool Support member 16 ·· Mounting bracket 17 · Screw 18 · · Wall slab

Claims

In a state where a plurality of cables penetrating into a through-hole of a structure wall or a floor wall are enclosed while being enclosed by a cable rack, a cable penetration portion for shielding a gap between the opening of the through-hole and the cable rack with a refractory material. In fire prevention construction method,
Fill the entire opening 2 while holding the cable 3 with the fireproof partition 9 cut in accordance with the opening 2 provided in the wall slab 18 or the floor slab 1 through which the plurality of cables 3 pass, or A first step of cutting and covering larger than the opening width while holding the cable 3;
A second step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler, and a third step of applying a fire spreader 12 to an arbitrary width of the cable 3, if necessary,
A fire prevention structure construction method for building cable penetrations.

In a state where a plurality of cables penetrating into a through-hole of a structure wall or a floor wall are enclosed while being enclosed by a cable rack, a cable penetration portion for shielding a gap between the opening of the through-hole and the cable rack with a refractory material. In fire prevention construction method,
A first step of setting the penetrating frame 5 or the fastener 14 in the opening 2 provided in the wall slab 18 or the floor slab 1 through which the plurality of cables 3 penetrate;
Fill the refractory partition material 9 cut in accordance with the opening 2 while sandwiching the cable 3 in the through frame 5, or cut larger than the width of the opening and sandwich the cable 3 on the fixture 14. A second step of coating;
A third step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler; and a fourth step of applying a fire spreader 12 to an arbitrary width of the cable 3 if necessary;
A fire prevention structure construction method for building cable penetrations.

Fire prevention structure of cable penetration part that shields between the opening of the through hole and the cable rack with a refractory material in a state where a plurality of cables penetrating into the through hole of the floor wall of the structure are enclosed by the cable rack In the construction method,
A first step of setting the opening 2 provided in the floor slab 1 through which the plurality of cables 3 pass so that the upper portion of the through frame 5 is located on the same plane as the floor slab surface;
The fixing member 3 including a locking member 10 having a bent portion from an end portion of the through frame 5 and a support member 11 adjusted to a predetermined length according to the size of the locking member 10, the cable 3 A second step of installing in parallel in the width direction of the cable rack 4 enclosed so as to be orthogonal;
A third step of filling the entire opening 2 while holding the cable 3 with the fireproof partitioning material 9 cut according to the size of the opening 2;
A fourth step of fixing a plurality of fixing members 14 on the upper surface of the fireproof partitioning material 9 filled in the third step; and a fifth step of filling the contact surface or gap between the fireproof partitioning material 9 and the cable 3 with a filler. A sixth step of applying a fire spreader 12 to an arbitrary width of the cable 3, if necessary,
A fire prevention structure construction method for building cable penetrations.

Fireproof structure of cable penetration part that shields between the opening of the through hole and the cable rack with a refractory material in a state in which a plurality of cables penetrating into the through hole of the wall of the structure are enclosed by the cable rack. In the construction method,
A support member made of a square steel hollow tube is inserted into an opening 2 provided in a wall slab 18 through which a plurality of cables 3 penetrates, and an end is inserted into the hollow tube from the end of the opening 2. A first step of installing in parallel the width direction of the cable rack 4 surrounding the cable 3 so that the fixing device 14 composed of a mounting portion whose other end is a flat steel is orthogonal;
A second step of attaching the fireproof partitioning material 9 cut in accordance with the size of the opening 2 while holding the cable 3 to the upper part of the fixing tool 14;
A fixture 3 comprising a locking member 10 having a bent portion and a support member 11 adjusted to a predetermined length according to the size of the locking member 10 on the upper part of the fireproof partition 9 attached in the second step. A third step of fixing the end of the locking member 10 to the wall slab 18;
A fourth step of filling the contact surface or gap between the refractory partitioning material 9 and the cable 3 with a filler; and a fifth step of applying a fire spread inhibitor 12 to an arbitrary width of the cable 3 if necessary;
A fire prevention structure construction method for building cable penetrations.

The fireproof structure construction method for a building cable penetrating part according to claim 1, wherein the filler is a fireproof partition material end material 11 or a heat resistant sealant 1010 used alone or in combination.

The fixture 3 includes a locking member 10 made of a round steel bar or a square steel bar having a bent portion with an attachment hole at an end, and a space portion that can be adjusted in length by fitting to the locking member 10. The fire prevention structure construction method for a building cable penetration part according to claim 2, wherein the fire prevention structure construction method comprises a supporting member 11 having the structure.

The fixing tool 14 is composed of a locking member made of a round steel bar or a square steel bar having an attachment hole at the end, and a support member having a space portion that can be fitted to the locking member and its length can be adjusted. The fireproof structure construction method for a building cable penetration part according to claim 2, wherein

In a state where a plurality of cables penetrating into a through-hole of a structure wall or a floor wall are enclosed while being enclosed by a cable rack, a cable penetration portion for shielding a gap between the opening of the through-hole and the cable rack with a refractory material. In fire protection structure,
A through frame 5 provided where necessary in an opening 2 provided in a floor slab 1 through which a plurality of cables 3 penetrate;
A fixture 3 comprising a locking member 10 having a bent portion and a support member 11 adjusted to a predetermined length according to the size of the locking member 10;
A cable rack 4 for adjusting the position of the cable;
Refractory partitioning material 9 filled in accordance with the size of the opening 2;
A fixing material for fixing the fireproof partition material 9;
A filler for filling a gap between the fireproof partition 9 and the cable 3;
A fire spreader 12 applied to an arbitrary width of the cable 3;
A fire prevention structure for building cable penetrations, characterized by comprising: