JP2007224665A - Fireproofing implement for through-part, and fireproofing structure of through-part in building - Google Patents

Fireproofing implement for through-part, and fireproofing structure of through-part in building Download PDF

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JP2007224665A
JP2007224665A JP2006048938A JP2006048938A JP2007224665A JP 2007224665 A JP2007224665 A JP 2007224665A JP 2006048938 A JP2006048938 A JP 2006048938A JP 2006048938 A JP2006048938 A JP 2006048938A JP 2007224665 A JP2007224665 A JP 2007224665A
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hole
state
expansion body
building
fire
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Mitsuhiro Washino
光弘 鷲野
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Inoac Corp
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Inoue MTP KK
Inoac Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fireproofing implement for a through part that can be easily and effectively constructed, and a fireproofing structure of the through part in a building. <P>SOLUTION: The fireproofing implement 10 is formed in sheet shape as a whole by sealing an expansion body 12 containing expanded graphite, in a compressed state by decompression into a sealed bag 11 made of synthetic resin. The fireproofing implement 10 is inserted in a clearance between the through hole provided in a wall or the like of the building, and piping inserted through the through hole, so as to be in a state of being wound around the piping. In this state, air is led into the sealed bag 11 to expand the expansion body 12 to thereby fill the clearance. The expansion body 12 in its natural state has volume to fill the through hole in the vanished state of the piping. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、建築物の壁や床等に設けられ、給水管や配電管等の配管を挿通させる貫通孔の防火処理に用いられる貫通部用防火処理具、及び、建築物における貫通部の防火処理構造に関するものである。   This invention is provided on a wall or floor of a building, and is used for fire prevention processing of a through hole through which a pipe such as a water supply pipe or a distribution pipe is inserted, and fire prevention of a penetration part in a building It relates to the processing structure.

建築物において防火区画とされた壁や床に、給水管や配電管等の配管が通る貫通孔を設けた場合には、この貫通孔を通じた煙の流通や延焼、また、給水管や配電管を媒介とした延焼を防止するための防火処理を貫通部に施す必要がある。   When a through-hole through which pipes such as water supply pipes and distribution pipes are provided in walls and floors that are designated as fire prevention zones in a building, the distribution and spread of smoke through these through-holes, as well as water supply pipes and distribution pipes It is necessary to apply a fire prevention treatment to the penetrating portion to prevent the spread of fire spreading through the medium.

従来、このような防火処理に用いられる貫通部用防火処理具として、例えば特許文献１に記載された防火処理用パッドがある。この防火処理用パッドは、図４（ａ），（ｂ）に示すように、ポリエチレン等の合成樹脂からなる袋４０の内部に、熱膨張性又は非熱膨張性のペースト状耐火材４１を封入したものである。この防火処理用パッドを施工するには、給水管等にこのパッドを巻き回し、この状態のままパッドを貫通孔内の隙間に押し込む。そして、貫通孔内において、貫通孔の内周面と給水管の外周面との間の隙間に合わせてパッドを変形させ、隙間を埋めるようにする。   Conventionally, for example, there is a fireproof processing pad described in Patent Document 1 as a fireproofing tool for a penetrating part used for such a fireproofing process. As shown in FIGS. 4A and 4B, this fireproof treatment pad encloses a thermally expandable or non-thermally expandable paste-like refractory material 41 inside a bag 40 made of a synthetic resin such as polyethylene. It is a thing. In order to construct the fireproof pad, the pad is wound around a water supply pipe or the like, and the pad is pushed into the gap in the through hole in this state. And in a through-hole, a pad is deform | transformed according to the clearance gap between the internal peripheral surface of a through-hole, and the outer peripheral surface of a water supply pipe, and it fills in a clearance gap.

また、特許文献２に記載された耐火充填材は、難燃性ゴム、含水ケイ酸ソーダを主成分とする粘土状のものであって、平板シート状に成形されている。この耐火充填材を施工するには、まず、耐火充填材をロール状に巻き回す。次に、図５に示すように、壁Ｗの貫通孔に装着された筒体５０の内周面と、この筒体５０に挿通された電線管５１の外周面との間の隙間に、耐火充填材のロール体５２を複数押し込んで隙間を塞ぐ。
特開２００５−７３３５７号公報 特開２００６−１６９６７号公報 Moreover, the fireproof filler described in Patent Document 2 is a clay-like material mainly composed of flame-retardant rubber and hydrous sodium silicate, and is formed into a flat sheet shape. In order to construct this refractory filler, first, the refractory filler is wound into a roll. Next, as shown in FIG. 5, in the gap between the inner peripheral surface of the cylindrical body 50 attached to the through hole of the wall W and the outer peripheral surface of the conduit 51 inserted through the cylindrical body 50, A plurality of filler rolls 52 are pushed in to close the gap.
JP 2005-73357 A JP 2006-16967 A

しかしながら、上記特許文献１に記載の防火処理用パッドを施工する際には、貫通孔と給水管との間の狭い隙間に、柔軟性のあるパッドを隙間ができないように押し込まなければならない。このため、施工が面倒であり、作業に長い時間を要する問題があった。特に、モルタル等の壁に設けられた貫通孔の内周面には角や突起が形成されているので、これらの角や突起にパッドが引っかかり易く、施工が難しかった。さらに、貫通孔に対してパッドをうまく押し込むことができないので、貫通孔とパッドとの間に隙間ができやすく、防火処理を有効に行うことができないことがあった。また、上記特許文献２に記載の耐火充填材を施工する際にも、特許文献１のものと同様な問題があった。 However, when constructing the fireproof treatment pad described in Patent Document 1, it is necessary to push the flexible pad into the narrow gap between the through hole and the water supply pipe so that there is no gap. For this reason, there is a problem that the construction is troublesome and the work takes a long time. In particular, since corners and protrusions are formed on the inner peripheral surface of the through hole provided in the wall of mortar or the like, the pads are easily caught on these corners and protrusions, and the construction is difficult. Furthermore, since the pad cannot be pushed into the through hole well, a gap is easily formed between the through hole and the pad, and the fire prevention treatment cannot be effectively performed. Moreover, when constructing the refractory filler described in Patent Document 2, there was a problem similar to that of Patent Document 1.

この発明の目的は、簡単かつ有効に施工することができる貫通部用防火処理具、及び、建築物における貫通部の防火処理構造を提供することにある。   An object of the present invention is to provide a fire prevention treatment tool for a penetration portion that can be easily and effectively constructed, and a fire prevention treatment structure for a penetration portion in a building.

上記目的を達成するため、請求項１に記載の発明は、合成樹脂製の密封袋の中に、難燃処理した膨張体を減圧による圧縮状態で密封し、全体としてシート状に形成したことを特徴とする。   In order to achieve the above object, the invention described in claim 1 is that a flame-retardant-treated expansion body is sealed in a compressed state by reduced pressure in a synthetic resin sealing bag, and formed into a sheet shape as a whole. Features.

請求項２に記載の発明は、請求項１に記載の発明において、前記膨張体は、その自然状態において貫通部の貫通孔を埋める容積を有していることを特徴とする。
請求項３に記載の発明は、請求項１又は請求項２に記載の発明において、前記膨張体は、膨張黒鉛を含有したポリウレタン発泡体であることを特徴とする。 According to a second aspect of the present invention, in the first aspect of the present invention, the expansion body has a volume that fills the through hole of the through portion in its natural state.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the expanded body is a polyurethane foam containing expanded graphite.

請求項４に記載の発明は、請求項１〜請求項３のいずれか一項に記載の発明において、建築物の壁部に設けられた貫通孔と、同貫通孔に挿通された配管との間の隙間に、請求項１〜請求項３のいずれか一項に記載の貫通部用防火処理具を同配管に巻回した状態で挿入し、この状態で前記密封袋の中に空気を導入して前記膨張体を膨張させることにより前記隙間を埋めたことを特徴とする。   Invention of Claim 4 is invention of any one of Claims 1-3. Between the through-hole provided in the wall part of a building, and the piping penetrated by the through-hole The fireproof treatment tool for penetration part according to any one of claims 1 to 3 is inserted into the gap between the pipes in a state of being wound around the pipe, and air is introduced into the sealing bag in this state. Then, the gap is filled by expanding the expansion body.

請求項５に記載の発明は、請求項４に記載の発明において、前記密封袋内への空気の導入は、同密封袋の一部を開放することにより行われることを特徴とする。
（作用）
請求項１〜請求項５に記載の発明によれば、例えば建築物の壁や床等の貫通孔と、この貫通孔に挿通された配管との間の隙間に、シート状の防火処理具を配管に巻回した状態で挿入し、この状態で密封袋の内部に空気を導入すると、圧縮状態の膨張体が膨張して同隙間を埋める。この結果、配管が膨張体によって巻回された状態で、配管と貫通孔との間の隙間が膨張体によって塞がれる。このとき、防火処理具は、シート状であることから、貫通孔の角や突起に殆ど引っ掛かることなく、両者間の隙間に容易に入り込む。従って、上記特許文献１，２に記載の防火処理具とは異なり、貫通孔と配管との間の隙間にペースト状又は粘土状のものを押し込むような作業が不要となるので、簡単に施工することができる。また、挿入後に膨張する防火処理具により、貫通孔の内周面と配管との間の隙間が有効に塞がれる。従って、特許文献１，２に記載の防火処理具とは異なり、貫通孔の内周面と配管との間に隙間ができにくいので、有効に施工することができる。 The invention described in claim 5 is the invention described in claim 4, wherein the introduction of air into the sealed bag is performed by opening a part of the sealed bag.
(Function)
According to invention of Claims 1-5, a sheet-like fireproof processing tool is put into the clearance gap between through-holes, such as a wall of a building, a floor, etc., and piping penetrated by this through-hole, for example. If it is inserted in a state wound around the pipe and air is introduced into the inside of the sealing bag in this state, the compressed expansion body expands to fill the gap. As a result, the gap between the pipe and the through hole is closed by the expansion body in a state where the pipe is wound by the expansion body. At this time, since the fireproof processing tool is in the form of a sheet, the fireproofing tool easily enters the gap between the both without being caught by the corners or protrusions of the through hole. Therefore, unlike the fire prevention tools described in Patent Documents 1 and 2, it is not necessary to push a paste-like or clay-like object into the gap between the through hole and the pipe, so it is easily constructed. be able to. Moreover, the clearance gap between the internal peripheral surface of a through-hole and piping is effectively block | closed by the fire prevention processing tool which expands after insertion. Therefore, unlike the fire prevention processing tools described in Patent Documents 1 and 2, since it is difficult to form a gap between the inner peripheral surface of the through hole and the pipe, the construction can be effectively performed.

請求項２に記載の発明によれば、請求項１に記載の発明の作用に加えて、壁等の貫通孔に挿通されている配管が火災により消失したときに、圧縮状態から解放された膨張体によって貫通孔が塞がれる。このため、配管の消失状態において、貫通孔を通じた煙の流通や延焼が防止される。   According to invention of Claim 2, in addition to the effect | action of invention of Claim 1, when the piping currently penetrated to through-holes, such as a wall, lose | disappears by a fire, the expansion | swelling released from the compression state The through hole is blocked by the body. For this reason, in the disappearance state of piping, the distribution | circulation and fire spread of the smoke through a through-hole are prevented.

この発明によれば、簡単かつ有効に施工することができる貫通部用防火処理具、及び、建築物における貫通部の防火処理構造を提供することができる。   According to the present invention, it is possible to provide a fire prevention treatment tool for a penetration portion that can be easily and effectively constructed, and a fire prevention treatment structure for a penetration portion in a building.

次に、この発明を具体化した一実施形態について図１〜図３を用いて説明する。
図１に示すように、貫通部用防火処理具（以下、単に防火処理具という。）１０は、密封された合成樹脂製の密封袋１１を有し、この密封袋１１の中には、難燃処理された膨張体１２が減圧による圧縮状態で密封されている。そして、施工前の防火処理具１０は、全体としてシート状に形成されている。 Next, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a through-hole fire prevention tool (hereinafter simply referred to as a fire prevention tool) 10 has a sealed synthetic resin sealing bag 11. The expanded body 12 subjected to the combustion treatment is sealed in a compressed state due to reduced pressure. And the fireproof processing tool 10 before construction is formed in the sheet form as a whole.

密封袋１１は、例えば厚さ３０μｍのポリエチレン樹脂からなり、図１（ａ）に示すように、両側に膨らみ代１３が形成された略長方形のシート状に形成されている。そして、密封袋１１は、両膨らみ代１３によって、図１（ｂ）に示すような略偏平直方体形状に膨らみ、膨張体１２を圧縮状態から解放するようになっている。   The sealing bag 11 is made of, for example, a polyethylene resin having a thickness of 30 μm, and is formed in a substantially rectangular sheet shape with swelling margins 13 formed on both sides as shown in FIG. Then, the sealing bag 11 swells into a substantially flat rectangular shape as shown in FIG. 1B by the double swell margin 13 so as to release the inflatable body 12 from the compressed state.

前記膨張体１２は、例えば膨張黒鉛を含有したポリウレタン発泡体からなる。このポリウレタン発泡体は、ポリオール、水、触媒、膨張黒鉛等の混合物と、ポリイソシアネートとを混合、攪拌及び吐出することによって得られたポリウレタン発泡体スラブから裁断されたものである。膨張黒鉛としては、天然黒鉛、キュシュ黒鉛、熱分解黒鉛等の高度に結晶が発達した黒鉛が用いられている。   The expanded body 12 is made of, for example, a polyurethane foam containing expanded graphite. This polyurethane foam is cut from a polyurethane foam slab obtained by mixing, stirring and discharging a mixture of polyol, water, catalyst, expanded graphite and the like and polyisocyanate. As expanded graphite, graphite having highly developed crystals such as natural graphite, cushy graphite, and pyrolytic graphite is used.

次に、上記のように構成された防火処理具の作用について説明する。
この防火処理具１０を施工するには、まず、図２（ａ）に示すように、例えば建築物の壁Ｗ（壁部）と貫通孔２０に挿通された給水管等の配管２１に対し、シート状の防火処理具１０を巻き回す。 Next, the operation of the fire prevention processing tool configured as described above will be described.
In order to construct this fire prevention treatment tool 10, first, as shown in FIG. 2A, for example, a wall 21 (wall portion) of a building and a pipe 21 such as a water supply pipe inserted through the through hole 20, A sheet-shaped fire prevention tool 10 is wound.

次に、図２（ｂ），（ｃ）に示すように、配管２１に巻き回した状態のままの防火処理具１０を、貫通孔２０と配管２１との間の隙間に挿入する。このとき、防火処理具１０は、シート状であることから、貫通孔２０の内周面の角や突起、また、配管２１の外周面に殆ど引っ掛かることなく両者間の隙間に容易に入り込む。そして、貫通孔２０の内周面と配管２１の外周面との間の隙間に挿入されたシート状の防火処理具１０は、図３（ａ），（ｂ）に示すように、配管２１を囲むように配置される。   Next, as shown in FIGS. 2 (b) and 2 (c), the fire prevention tool 10 that is still wound around the pipe 21 is inserted into the gap between the through hole 20 and the pipe 21. At this time, since the fireproof processing tool 10 is in the form of a sheet, the fireproof processing tool 10 easily enters the gap between the two without being caught by the corners or protrusions of the inner peripheral surface of the through-hole 20 and the outer peripheral surface of the pipe 21. And the sheet-like fire-fighting processing tool 10 inserted in the clearance gap between the internal peripheral surface of the through-hole 20 and the outer peripheral surface of the piping 21 is the pipe | tube 21 as shown to Fig.3 (a), (b). Arranged to surround.

次に、隙間に挿入された防火処理具１０の密封袋１１の一部を、例えばカッターナイフによって穴を開けることで開放させ、密封袋１１内に空気を導入させる。すると、膨張体１２が圧縮状態から解放され、図３（ｃ）に示すように、膨張した防火処理具１０により隙間が埋められる。この結果、配管２１に膨張体１２が巻回された状態で、配管２１と貫通孔２０との間の隙間が膨張体１２によって塞がれる。このとき、貫通孔２０に挿入された状態で膨張した膨張体１２により、貫通孔２０の内周面と配管２１との間の隙間が有効に塞がれる。   Next, a part of the sealing bag 11 of the fire prevention processing tool 10 inserted in the gap is opened by, for example, making a hole with a cutter knife, and air is introduced into the sealing bag 11. Then, the expansion body 12 is released from the compressed state, and the gap is filled with the expanded fire prevention tool 10 as shown in FIG. As a result, the gap between the pipe 21 and the through hole 20 is closed by the expansion body 12 in a state where the expansion body 12 is wound around the pipe 21. At this time, the gap between the inner peripheral surface of the through hole 20 and the pipe 21 is effectively blocked by the expanding body 12 that has expanded in a state of being inserted into the through hole 20.

非火災時においては、貫通孔２０と配管２１との間の隙間を埋めた膨張体１２の振動吸収作用により、配管２１を通る水の脈動やウォータハンマ等による配管２１の振動が吸収され、貫通孔２０が設けられた壁等の共振が抑制される。   In a non-fire time, the vibration absorbing action of the expansion body 12 filling the gap between the through hole 20 and the pipe 21 absorbs the vibration of the pipe 21 due to the pulsation of water passing through the pipe 21 and the water hammer. Resonance of the wall provided with the hole 20 is suppressed.

また、火災時においては、貫通孔２０と配管２１との間の隙間を埋めた膨張体１２中の膨張黒鉛の難燃性により、貫通孔２０を通じた延焼が防止される。また、膨張体１２は、配管２１が火災によって消失していくにつれ、ポリウレタン発泡体の弾性と、膨張黒鉛の膨張とによって徐々に膨張する。そして、図３（ｄ）に示すように、配管２１が消失した状態においては、膨張した膨張体１２によって貫通孔２０全体が塞がれた状態となり、貫通孔２０を通じた煙の流通や延焼が防止される。すなわち、膨張体１２は、その自然状態において貫通孔２０を埋める容積を有している。さらに、膨張体１２が燃焼炭化しても膨張黒鉛によって膨張体１２の形状が保持され、膨張体１２により貫通孔２０が塞がれた状態が維持される。このため、膨張体１２が燃焼炭化した状態においても、貫通孔２０を通じた煙の流通や延焼が防止される。   Further, in the event of a fire, the fire spread through the through hole 20 is prevented by the flame retardancy of the expanded graphite in the expansion body 12 filling the gap between the through hole 20 and the pipe 21. In addition, the expanded body 12 gradually expands due to the elasticity of the polyurethane foam and the expanded graphite as the pipe 21 disappears due to the fire. Then, as shown in FIG. 3D, in the state where the pipe 21 has disappeared, the entire through hole 20 is closed by the expanded body 12, and the flow of smoke and the spread of fire through the through hole 20 are prevented. Is prevented. That is, the expansion body 12 has a volume that fills the through hole 20 in its natural state. Furthermore, even if the expansion body 12 is combusted and carbonized, the shape of the expansion body 12 is maintained by the expanded graphite, and the state in which the through hole 20 is closed by the expansion body 12 is maintained. For this reason, even when the expanded body 12 is combusted and carbonized, it is possible to prevent the flow of smoke and the spread of fire through the through holes 20.

以上のように構成されたこの実施形態には、以下の各効果がある。
（１） 合成樹脂製の密封袋１１の中に、難燃処理した膨張体１２が減圧による圧縮状態で密封されたシート状の防火処理具１０を、配管２１に巻回した状態で貫通孔２０と配管２１との間の隙間に挿入する。そして、この状態で密封袋１１の内部に空気を導入し、膨張体１２を膨張させることによって隙間を塞ぐようにした。このとき、防火処理具１０は、シート状であることから、貫通孔２０の内周面の角や突起、また、配管２１に殆ど引っ掛かることなく両者間の隙間に容易に挿入される。従って、前記特許文献１，２に記載の防火処理具とは異なり、貫通孔２０と配管２１との間の隙間にペースト状又は粘土状のものを押し込むような作業が不要となるので、簡単に施工することができる。また、挿入後に膨張する防火処理具１０により、貫通孔２０の内周面と配管２１との間の隙間が有効に塞がれる。従って、特許文献１，２に記載の防火処理具とは異なり、貫通孔２０と配管２１との間に隙間ができにくいので、有効に施工することができる。 The embodiment configured as described above has the following effects.
(1) The sheet-shaped fire-proof treatment tool 10 in which the flame retardant-treated expansion body 12 is sealed in a compressed state due to reduced pressure in the synthetic resin sealing bag 11 is wound around the pipe 21 in the through hole 20. And inserted into the gap between the pipe 21. And in this state, air was introduced into the inside of the sealing bag 11 and the expansion body 12 was inflated to close the gap. At this time, since the fireproof processing tool 10 is in the form of a sheet, the fireproofing tool 10 is easily inserted into a gap between the corners and protrusions of the inner peripheral surface of the through hole 20 and the pipe 21 with almost no catching. Therefore, unlike the fire prevention tools described in Patent Documents 1 and 2, an operation of pushing a paste-like or clay-like object into the gap between the through hole 20 and the pipe 21 is not necessary, so that Can be constructed. Moreover, the clearance gap between the internal peripheral surface of the through-hole 20 and the piping 21 is effectively block | closed by the fireproof processing tool 10 which expands after insertion. Therefore, unlike the fire prevention processing tools described in Patent Documents 1 and 2, it is difficult to form a gap between the through hole 20 and the pipe 21, so that the construction can be effectively performed.

（２） 膨張体１２は、その自然状態において貫通孔２０を埋める容積を有しているので、壁等の貫通孔２０に挿通されている配管２１が火災により消失したときに、圧縮状態から解放された膨張体１２によって貫通孔２０が塞がれる。このため、配管２１の消失状態において、貫通孔２０を通じた煙の流通や延焼が防止される。   (2) Since the expansion body 12 has a capacity to fill the through-hole 20 in its natural state, it is released from the compressed state when the pipe 21 inserted through the through-hole 20 such as a wall disappears due to a fire. The through-hole 20 is closed by the expanded body 12 thus formed. For this reason, in the disappearance state of the piping 21, the distribution and spread of smoke through the through hole 20 are prevented.

なお、図１（ａ）に二点鎖線で示すように、密封袋１１に予め空気排出用の孔３０を形成しておき、この孔３０をシール３１によって塞いでおいてもよい。この場合には、シール３１を剥がして孔３０を開放するだけで密封袋１１内に空気を導入することができ、施工作業性が向上する。   Note that, as indicated by a two-dot chain line in FIG. 1A, an air discharge hole 30 may be formed in the sealing bag 11 in advance, and the hole 30 may be closed with a seal 31. In this case, it is possible to introduce air into the sealing bag 11 simply by peeling off the seal 31 and opening the hole 30, thereby improving the workability.

（ａ），（ｂ）は共に貫通部用防火処理具を示す斜視図。(A), (b) is a perspective view which shows the fireproof processing tool for penetration parts. （ａ），（ｂ），（ｃ）はいずれも貫通部用防火処理具の施工手順を示す斜視図。(A), (b), (c) is a perspective view which shows the construction procedure of all the fire prevention processing tools for penetration parts. （ａ），（ｂ），（ｃ），（ｄ）はいずれも貫通部用防火処理具の施工時における貫通部を示す正面図。(A), (b), (c), (d) is a front view which shows the penetration part at the time of construction of the fireproof processing tool for penetration parts. （ａ）は、従来の貫通部用防火処理具を示す斜視図、（ｂ）は、（ａ）の縦断面図。(A) is a perspective view which shows the conventional fireproof processing tool for penetration parts, (b) is a longitudinal cross-sectional view of (a). 同じく設置状態の貫通部用防火処理具を示す斜視図。The perspective view which similarly shows the fireproof processing tool for penetration parts of an installation state.

符号の説明Explanation of symbols

１０…貫通部用防火処理具、１１…密封袋、１２…膨張体、１３…膨らみ代、２０…貫通孔、２１…配管、Ｗ…壁部としての壁。   DESCRIPTION OF SYMBOLS 10 ... Fireproof processing tool for penetration parts, 11 ... Sealing bag, 12 ... Expansion body, 13 ... Swelling allowance, 20 ... Through-hole, 21 ... Pipe, W ... Wall as wall part.

Claims (5)

合成樹脂製の密封袋の中に、難燃処理した膨張体を減圧による圧縮状態で密封し、全体としてシート状に形成したことを特徴とする貫通部用防火処理具。   A fireproof treatment tool for a penetration part, wherein a flame-retardant-treated expansion body is sealed in a compressed state by decompression in a synthetic resin sealing bag and formed into a sheet shape as a whole. 前記膨張体は、その自然状態において貫通部の貫通孔を埋める容積を有していることを特徴とする請求項１に記載の貫通部用防火処理具。   2. The fire prevention tool for a penetration part according to claim 1, wherein the expansion body has a volume that fills the through hole of the penetration part in a natural state. 前記膨張体は、膨張黒鉛を含有したポリウレタン発泡体であることを特徴とする請求項１又は請求項２に記載の貫通部用防火処理具。   The fireproof treatment tool for penetrating parts according to claim 1 or 2, wherein the expanded body is a polyurethane foam containing expanded graphite. 建築物の壁部に設けられた貫通孔と、同貫通孔に挿通された配管との間の隙間に、請求項１〜請求項３のいずれか一項に記載の貫通部用防火処理具を同配管に巻回した状態で挿入し、この状態で前記密封袋の中に空気を導入して前記膨張体を膨張させることにより前記隙間を埋めたことを特徴とする建築物における貫通部の防火処理構造。   In the clearance between the through-hole provided in the wall part of a building, and the piping penetrated by the through-hole, the fire-proof processing tool for penetration parts as described in any one of Claims 1-3 is provided. Inserting in a state of being wound around the pipe, and introducing the air into the sealing bag in this state to inflate the expansion body, thereby filling the gap, and fire-proofing the through portion in the building Processing structure. 前記密封袋内への空気の導入は、同密封袋の一部を開放することにより行われることを特徴とする請求項４に記載の建築物における貫通部の防火処理構造。   The fire-proofing structure for a penetrating part in a building according to claim 4, wherein the introduction of air into the sealing bag is performed by opening a part of the sealing bag.
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