JP2003236007A - Fire prevention structure for pierced part of fire prevention section unit - Google Patents
Fire prevention structure for pierced part of fire prevention section unitInfo
- Publication number
- JP2003236007A JP2003236007A JP2002036780A JP2002036780A JP2003236007A JP 2003236007 A JP2003236007 A JP 2003236007A JP 2002036780 A JP2002036780 A JP 2002036780A JP 2002036780 A JP2002036780 A JP 2002036780A JP 2003236007 A JP2003236007 A JP 2003236007A
- Authority
- JP
- Japan
- Prior art keywords
- fire prevention
- fire
- peripheral surface
- section unit
- sheath tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、鞘管が貫通した部
分を防火処理してなる防火区画体の貫通部の防火構造に
関する。
【０００２】
【従来の技術】従来より、集合住宅の壁を貫通する給
水、給湯管は、長期間の使用による赤水、漏水等で、こ
れら配管を交換する必要がある。ところが、これら配管
が壁に直接埋設されている場合には、これら配管が貫通
される壁の貫通部の周辺を削り取った後でなければ、こ
れら配管を交換することができなかった。よって、この
壁を削り取る作業は、壁の強度を損なわないように慎重
に行わなければならないので、これら配管の交換作業に
は手間がかかっていた。
【０００３】そこで、このような問題を解決するため
に、壁の打設時に鞘管を挿通するための貫通孔を予め形
成しておき、その貫通孔内に鞘管を挿入する鞘管工法が
開発されている。この鞘管工法では、鞘管内に配管を挿
通することによって、壁に配管を貫通させているので、
配管の交換の際に、配管が貫通される壁の貫通部の周辺
を削り取る必要がない。しかしながら、鞘管の外周面と
貫通孔の内壁との間には、隙間が形成されているので、
壁を挟んだ一方の区画で火災が発生した場合には、壁が
防火区画体で形成されていても、火焔や煙がこの隙間を
通過して隣接する他方の区画に延焼することになる。し
たがって、鞘管が貫通される壁の貫通部には、火災時の
延焼を防止するために、図２および図３に示すような防
火処置工法を施すことが義務付けられている。
【０００４】図２に示す防火処置工法は、壁等の防火区
画体１１０の打設時に、円筒状のスリーブ管１００を防
火区画体１１０内の所定の位置に予め埋設して貫通孔を
形成しておき、この貫通孔内に蛇腹状の鞘管１０１を挿
入する。そして、貫通孔と鞘管１０１との隙間にモルタ
ル１０３等を充填するとともに、防火区画１２０側に配
置された貫通孔の開口部１０５から約１ｍの範囲の鞘管
１０１の外周部（図２中左側）にも、この鞘管１０１の
外周部を覆うようにしてモルタル１０３等を打設する。
そして、これらモルタル等の硬化後に、鞘管１０１内に
ポリブデン管等で形成された可撓性のある給水、給湯管
１０２を挿入する。
【０００５】また、図３に示すように、（財）日本建築
センター（ＢＣＪ）の評価制度に基づく防火処置（ＢＣ
Ｊ）工法では、防火区画体１１０の打設時に紙製スリー
ブ管を防火区画体１１０内の所定の位置に埋設し、この
防火区画体１１０が硬化した後に、紙製スリーブ管を除
去して貫通孔を形成していた。そして、この貫通孔内に
鞘管１０１を挿入し、この貫通孔と鞘管１０１との隙間
に、熱膨張性耐火材１０６が内周面に取付けられた防火
区画貫通処理材１０７を挿入する。次に、貫通孔と鞘管
１０１との隙間、および、貫通孔と防火区画貫通処理材
１０７との隙間にそれぞれモルタル１０３等を充填し
て、これらの隙間を完全に塞ぐ。そして、このモルタル
等の硬化後に、鞘管１０１内に給水、給湯管１０２を挿
入する。
【０００６】
【発明が解決しようとする課題】しかしながら、従来の
防火処置工法では、防火区画体が硬化した後に、再度、
貫通孔と鞘管との隙間にモルタル等を充填するととも
に、防火区画側に配置された貫通孔の開口部から約１ｍ
の範囲の鞘管の外周部にも、この鞘管の外周部を覆うよ
うにしてモルタル等を打設する必要がある。よって、こ
れらモルタル等の充填および打設作業に手間を要してい
た。
【０００７】一方、ＢＣＪ工法では、鞘管の外周部を覆
うようにしてモルタル等を打設する必要はないが、防火
区画体が硬化した後に、貫通孔に貼り付いた可燃性の紙
製スリーブ管を除去する必要があり、この除去作業に手
間を要していた。また、紙製スリーブ管を除去した後、
貫通孔と鞘管との隙間、および、貫通孔と防火区画貫通
処理材との隙間にそれぞれモルタル等を充填する必要が
あり、このモルタル等の充填作業に手間を要していた。
【０００８】上記事情に鑑み、本発明の課題は、鞘管が
貫通される防火区画体の貫通部に再度モルタル等の充填
や打設をすることなく、火災の延焼を防止できる防火区
画体の貫通部の防火構造を提供することである。
【０００９】
【課題を解決するための手段】以上の課題を解決するた
め、請求項１記載の発明は、例えば、図１に示すよう
に、耐火材で形成された壁、床等の防火区画体１に、そ
の厚さ方向に鞘管４を貫通し、この貫通した部分を防火
処理してなる防火区画体１の貫通部２の防火構造であっ
て、前記防火区画体１には、筒状をなす不燃性の外筒６
が、その両端開口を前記防火区画体１の両表面側にそれ
ぞれ開口するようにして埋設されており、前記外筒６の
内側には、この外筒６の内周面に密接する筒状をなし、
前記鞘管４が挿通される不燃性の内筒７が挿入されてお
り、この内筒７と、その内側に挿通された前記鞘管４と
の間には、熱膨張することによって前記内筒７と鞘管４
とに密着し、かつ耐火性を有する熱膨張性耐火材８が、
前記内筒７の内周方向に延在するようにして設けられて
いることを特徴とする。
【００１０】請求項１記載の発明によれば、防火区画体
に埋設された不燃性の外筒の内側に、この外筒の内周面
に密接する筒状をなし、鞘管が挿通される不燃性の内筒
が挿入されているので、外筒の内周面と内筒の外周面と
の間には隙間が形成されることがない。つまり、外筒の
内周面に内筒の外周面が密接しているので、外筒の内周
面と内筒の外周面との間にモルタル等を充填する必要が
ない。
【００１１】さらに、内筒と、鞘管との間には、熱膨張
することによって内筒と鞘管とに密着し、かつ耐火性を
有する熱膨張性耐火材が、内筒の内周方向に延在するよ
うにして設けられているので、防火区画体を挟んだ一方
の区画内で火災が発生した場合、一方の区画内の室温が
上昇し、熱膨張性耐火材が膨張し始める。すると、この
熱膨張性耐火材が鞘管の外周面と内筒の内周面とに密着
し、鞘管の外周面と内筒の内周面との隙間を塞ぐように
なる。したがって、火焔や煙が防火区画体の貫通部を通
過して隣接する区画に延焼するのを防止できる。
【００１２】
【発明の実施の形態】以下、図１を参照して本発明の実
施の形態を詳細に説明する。本実施の形態にかかわる防
火構造は、防火区画体１に、その厚さ方向に鞘管４を貫
通し、この貫通した部分を防火処理してなる防火区画体
１の貫通部２に適用するものである。
【００１３】防火区画体１は、鉄筋コンクリート製の床
部５に立設された鉄筋コンクリート製の壁１であって、
水道メータや給湯熱源装置等を納めたメータボックス等
の発火源を有する区画Ａとその他の区画Ｂとを仕切って
いる。ここで、防火区画体１の厚さは１５０ｍｍになっ
ている。また、防火区画体１には、筒状をなす銅管で形
成された外筒６が埋設されている。
【００１４】外筒６は、径の異なる２つの銅管部６ａ、
６ｂが、テーパを介して軸方向に連結するようにして一
体成形されたものである。この外筒６の小口径側の内径
は、鞘管４の外径より若干大きく形成されている。ま
た、この外筒６の長さは、防火区画体１の厚さとほぼ同
じになっている。そして、外筒６は、大口径側の開口を
区画Ａ側に開口するように、かつ、小口径側の開口を区
画側Ｂに開口するようにして防火区画体１に埋設されて
いる。また、外筒６の大口径側の内側には、鞘管４が挿
通される鋼製の内筒７が挿入されている。
【００１５】内筒７は、外筒６の大口径側の内周面に密
接する筒状をなし、その外径が外筒６の大口径側の内径
より大きくなっている。また、この内筒７の長さは、大
口径側の鋼管部６ａの長さとほぼ等しくなっており、内
筒７の側面には、両端間に延在するスリットが形成され
ている。そして、内筒７は弾性的に縮径可能でかつ、こ
の縮径状態から弾性復帰力で拡径して、外筒６の内周面
に密接している。また、内筒７の内周面には、熱膨張す
ることによって内筒７と鞘管４とに密着し、かつ耐火性
を有する帯板状の熱膨張性耐火材８が周方向に延在する
ようにして取付けられている。よって、この熱膨張性耐
火材８は、内筒７の内周面と、その内側に挿入された鞘
管４の外周面との間に、内筒７の内周方向に延在するよ
うにして設けられている。ここで、通常時において、鞘
管４の外周面の一部が、熱膨張性耐火材８の表面に当接
した状態になっている。
【００１６】鞘管４は、内部にポリブデンで形成された
給水、給湯用の配管９や、給電用のケーブル（図示しな
い）が挿通された可撓性を有する蛇腹状のＣＤ管（COMB
INEDDUCT）である。また、配管９の外周面には、難燃性
シート（図示しない）が巻き付けられており、配管９の
焼失や溶融の防止を図っている。
【００１７】次に、本実施の形態にかかわる防火区画体
１の貫通部２の防火処置工法について説明する。まず、
内筒７の内周面に、耐火性を有する熱膨張性耐火材８を
周方向に延在するようにして予め取付けておく。そし
て、外筒６の大口径側の開口を区画Ａ側（図１中右側）
に開口させるように、かつ、小口径側の開口を区画側Ｂ
（図１中左側）に開口させるようにして、防火区画体１
の打設時に外筒６を防火区画体１内に埋設する。次に、
外筒６の内部に鞘管４を貫通させ、外筒６の大口径側の
開口から、外筒６の大口径側の内側に、内筒７の内側に
鞘管４を挿通させるようにして、内筒７を縮径させなが
ら挿入する。すると、この内筒７の内周面と、その内側
に挿通された鞘管４の外周面との間には、熱膨張性耐火
材８が内筒７の円周方向に延在するようにして設けられ
る。その際に、内筒７は縮径状態から弾性復帰で拡径し
て、外筒６の内周面に内筒７の外周面が密接する。そし
て、鞘管４の内部に給水、給湯用の配管９や、給電用の
ケーブルを挿通する。
【００１８】以上により、本実施の形態によれば、防火
区画体１に埋設された銅製の外筒６の内側に、この外筒
６の内周面に密接する筒状をなし、鞘管４が挿通される
鋼製の内筒７が挿入されているので、外筒６の内周面と
内筒７の外周面との間には隙間が形成されることがな
い。つまり、外筒６の内周面に内筒７の外周面が密接し
ているので、外筒６の内周面と内筒７の外周面との間に
モルタル等を充填する必要がない。
【００１９】また、内筒７と、鞘管４との間には、熱膨
張することによって内筒７と鞘管４とに密着し、かつ耐
火性を有する熱膨張性耐火材８が、内筒７の内周方向に
延在するようにして設けられている。よって、区画Ａ内
のメータボックスで火災が発生した場合、区画Ａ内の室
温が上昇し、熱膨張性耐火材８が膨張し始める。する
と、この熱膨張性耐火材８が鞘管４の外周面と内筒７の
内周面とに密着し、鞘管４の外周面と内筒７の内周面と
の隙間を塞ぐようになる。したがって、火焔や煙が防火
区画体の貫通部２を通過して隣接する区画に延焼するの
を防止できる。
【００２０】さらに、外筒６の小口径側の内径は、鞘管
４の外径より若干大きく形成されているので、外筒６に
挿通された鞘管４は、その軸方向と直交する方向の動き
が制限されることになる。また、通常時において、鞘管
４の外周面の一部が、熱膨張性耐火材８の表面に当接し
た状態になっているので、鞘管４は、熱膨張性耐火材８
の表面と外筒６の小口径側の内周面とによって、貫通部
２からはずれにくくなっている。
【００２１】また、内筒７の内周面に、熱膨張性耐火材
８が周方向に延在するようにして取付けられているの
で、内筒７を外筒６の内側に挿入することによって、内
筒７の内周面と、その内側に挿通された鞘管４の外周面
との間に、内筒７の内周方向に延在するようにして熱膨
張性耐火材８を容易に設けることができる。
【００２２】さらに、内筒７は弾性的に縮径可能でか
つ、この縮径状態から弾性復帰力で拡径して、外筒６の
大口径側の内周面に密接しているので、外筒６の大口径
側の内側に挿入された内筒７は、内筒７の外周面で外筒
６の内周面を常に押圧するようにして、外筒６の内側に
設置されている。よって、外筒６の大口径側の内周面に
内筒７の外周面を確実に密接することができるととも
に、外筒６の大口径側の内側から内筒７がはずれるのを
防止できる。
【００２３】なお、本実施の形態における記述内容は、
本発明の趣旨を逸脱しない範囲で適宜変更可能である。
例えば、本実施の形態では、壁に鞘管を貫通させる場合
に本発明を適用した例を説明したが、耐火材で形成され
た床に鞘管を貫通させる場合にも本発明を適用してもよ
い。
【００２４】
【発明の効果】以上のように、請求項１記載の発明によ
れば、防火区画体に埋設された不燃性の外筒の内側に、
外筒の内周面に密接する不燃性の内筒が挿入されている
ので、外筒の内周面と内筒の外周面との間には隙間が形
成されることがない。よって、外筒の内周面と内筒の外
周面との間にモルタル等を充填する必要がない。さら
に、内筒と、鞘管との間には、熱膨張性耐火材が、内筒
の内周方向に延在するようにして設けられているので、
この熱膨張性耐火材が、鞘管の外周面と内筒の内周面と
の隙間を塞ぐようになり、火焔や煙が防火区画体の貫通
部を通過して隣接する区画に延焼するのを防止できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire protection structure for a penetration portion of a fire protection compartment formed by performing a fire treatment on a portion through which a sheath tube penetrates. 2. Description of the Related Art Conventionally, water supply and hot water supply pipes penetrating the walls of an apartment house have to be replaced due to red water, water leakage, etc. due to long-term use. However, when these pipes are directly buried in the wall, the pipes cannot be replaced unless the periphery of the penetrating portion of the wall through which these pipes pass is cut off. Therefore, the work of scraping the wall must be performed carefully so as not to impair the strength of the wall, and the work of replacing these pipes is troublesome. [0003] In order to solve such a problem, a sheath tube method has been proposed in which a through hole for inserting a sheath tube is previously formed at the time of placing a wall, and the sheath tube is inserted into the through hole. Is being developed. In this sheath pipe method, since the pipe is penetrated through the wall by inserting the pipe into the sheath pipe,
When exchanging the piping, it is not necessary to cut off the periphery of the penetrating portion of the wall through which the piping is penetrated. However, since a gap is formed between the outer peripheral surface of the sheath tube and the inner wall of the through hole,
When a fire occurs in one of the sections sandwiching the wall, even if the wall is formed of a fire protection section, a flame or smoke will spread through the gap to the adjacent section. Therefore, in order to prevent the spread of fire in the event of a fire, it is mandatory to apply a fire-prevention treatment method as shown in FIGS. 2 and 3 to the penetration portion of the wall through which the sheath tube penetrates. In the fire prevention treatment method shown in FIG. 2, a cylindrical sleeve tube 100 is buried in a predetermined position in the fire prevention partition 110 in advance to form a through hole when the fire prevention partition 110 such as a wall is cast. Beforehand, a bellows-shaped sheath tube 101 is inserted into this through hole. Then, the gap between the through hole and the sheath tube 101 is filled with mortar 103 and the like, and the outer peripheral portion of the sheath tube 101 within a range of about 1 m from the opening portion 105 of the through hole arranged on the fire protection section 120 side (in FIG. A mortar 103 and the like are also cast on the left side) so as to cover the outer peripheral portion of the sheath tube 101.
Then, after the mortar or the like is hardened, a flexible water supply / hot water supply pipe 102 formed of a polybutene pipe or the like is inserted into the sheath pipe 101. [0005] As shown in FIG. 3, fire prevention measures (BC) based on the evaluation system of the Japan Building Center (BCJ).
J) In the construction method, a paper sleeve tube is buried at a predetermined position in the fire protection partition 110 when the fire protection partition 110 is cast, and after the fire protection partition 110 has hardened, the paper sleeve tube is removed and penetrated. A hole was formed. Then, the sheath tube 101 is inserted into the through-hole, and a fire-prevention section penetration treatment material 107 having a thermally expandable refractory material 106 attached to the inner peripheral surface thereof is inserted into a gap between the through-hole and the sheath tube 101. Next, the gap between the through-hole and the sheath tube 101 and the gap between the through-hole and the fire-prevention section penetration treatment material 107 are filled with mortar 103 and the like, respectively, and these gaps are completely closed. Then, after the mortar is cured, the water supply and hot water supply pipes 102 are inserted into the sheath pipe 101. [0006] However, in the conventional fire prevention treatment method, after the fire prevention compartment is hardened, the fire prevention treatment is repeated.
The gap between the through hole and the sheath tube is filled with mortar and the like, and about 1 m from the opening of the through hole arranged on the fire protection compartment side.
It is necessary to cast a mortar or the like also on the outer peripheral portion of the sheath tube in the range described above so as to cover the outer peripheral portion of the sheath tube. Therefore, the work of filling and pouring these mortars and the like has been troublesome. On the other hand, in the BCJ method, it is not necessary to cast mortar or the like so as to cover the outer peripheral portion of the sheath tube. However, after the fire prevention compartment is hardened, a flammable paper sleeve adhered to the through hole. The pipe had to be removed, and this removal operation was troublesome. Also, after removing the paper sleeve tube,
It is necessary to fill the gap between the through-hole and the sheath tube and the gap between the through-hole and the fire-prevention section penetration treatment material with mortar and the like, and the work of filling the mortar and the like has been troublesome. [0008] In view of the above circumstances, an object of the present invention is to provide a fire protection compartment that can prevent a fire from spreading without refilling or driving mortar or the like into the penetration portion of the fire protection compartment through which the sheath tube penetrates. An object of the present invention is to provide a fire prevention structure for a penetration portion. [0009] In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIG. 1, a fire prevention section such as a wall or a floor made of a refractory material. The fire protection structure of the penetration part 2 of the fire-prevention compartment 1 formed by penetrating the sheath tube 4 in the thickness direction of the body 1 and performing a fire-prevention treatment on the penetrated portion. Incombustible outer cylinder 6
Are buried so that both end openings are opened on both surface sides of the fire protection compartment 1, and inside the outer cylinder 6, a cylindrical shape closely contacting the inner peripheral surface of the outer cylinder 6 is provided. None,
A non-combustible inner cylinder 7 into which the sheath tube 4 is inserted is inserted, and the inner tube is thermally expanded between the inner tube 7 and the sheath tube 4 inserted therein. 7 and sheath tube 4
And a thermally expandable refractory material 8 having fire resistance,
It is provided so as to extend in the inner circumferential direction of the inner cylinder 7. According to the first aspect of the present invention, the sheath tube is inserted inside the non-combustible outer cylinder buried in the fire protection compartment into a cylindrical shape closely contacting the inner peripheral surface of the outer cylinder. Since the non-combustible inner cylinder is inserted, no gap is formed between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. That is, since the outer peripheral surface of the inner cylinder is in close contact with the inner peripheral surface of the outer cylinder, there is no need to fill the mortar or the like between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. Further, between the inner cylinder and the sheath tube, a thermally expandable refractory material having a fire resistance, which is in close contact with the inner cylinder and the sheath tube by thermal expansion, is provided in the inner circumferential direction of the inner cylinder. When a fire occurs in one of the sections sandwiching the fire protection section, the room temperature in one section increases, and the heat-expandable refractory material starts to expand. Then, the heat-expandable refractory material comes into close contact with the outer peripheral surface of the sheath tube and the inner peripheral surface of the inner tube, and closes the gap between the outer peripheral surface of the sheath tube and the inner peripheral surface of the inner tube. Therefore, it is possible to prevent the flame or smoke from spreading through the penetrating portion of the fire prevention compartment to the adjacent compartment. An embodiment of the present invention will be described below in detail with reference to FIG. The fire protection structure according to the present embodiment is applied to the penetration part 2 of the fire protection compartment 1 that penetrates through the sheath tube 4 in the thickness direction of the fire protection compartment 1 and performs a fire treatment on the penetrated portion. It is. The fire protection compartment 1 is a reinforced concrete wall 1 erected on a reinforced concrete floor 5,
A section A having an ignition source such as a meter box containing a water meter and a hot water supply heat source device and the other section B are partitioned. Here, the thickness of the fire protection compartment 1 is 150 mm. In addition, the fire protection compartment 1 has embedded therein an outer cylinder 6 formed of a tubular copper pipe. The outer cylinder 6 has two copper tubes 6a having different diameters.
6b is integrally formed so as to be connected in the axial direction via a taper. The inner diameter of the outer cylinder 6 on the small diameter side is formed slightly larger than the outer diameter of the sheath tube 4. The length of the outer cylinder 6 is substantially the same as the thickness of the fire protection compartment 1. The outer cylinder 6 is buried in the fire protection compartment 1 such that the opening on the large diameter side opens to the section A and the opening on the small diameter side opens on the section side B. A steel inner cylinder 7 into which the sheath tube 4 is inserted is inserted inside the outer cylinder 6 on the large diameter side. The inner cylinder 7 has a cylindrical shape closely contacting the inner peripheral surface of the outer cylinder 6 on the large diameter side, and has an outer diameter larger than the inner diameter of the outer cylinder 6 on the large diameter side. The length of the inner cylinder 7 is substantially equal to the length of the steel pipe portion 6a on the large diameter side, and a slit extending between both ends is formed on a side surface of the inner cylinder 7. The inner cylinder 7 can be elastically reduced in diameter, and the diameter of the inner cylinder 7 is increased by an elastic return force from the reduced diameter state, so that the inner cylinder 7 is in close contact with the inner peripheral surface of the outer cylinder 6. On the inner peripheral surface of the inner cylinder 7, a thermally expandable refractory material 8 in the form of a strip that is in close contact with the inner cylinder 7 and the sheath tube 4 by thermal expansion and has fire resistance extends in the circumferential direction. It is attached so that it does. Therefore, the heat-expandable refractory material 8 extends in the inner circumferential direction of the inner cylinder 7 between the inner peripheral surface of the inner cylinder 7 and the outer peripheral surface of the sheath tube 4 inserted therein. It is provided. Here, in a normal state, a part of the outer peripheral surface of the sheath tube 4 is in a state of being in contact with the surface of the thermally expandable refractory material 8. The sheath tube 4 has a flexible bellows-shaped CD tube (COMB) into which a water supply / hot water supply pipe 9 formed of polybutene and a power supply cable (not shown) are inserted.
INEDDUCT). Further, a flame-retardant sheet (not shown) is wound around the outer peripheral surface of the pipe 9 to prevent the pipe 9 from burning out and melting. Next, a method for fire-prevention treatment of the penetration portion 2 of the fire-prevention compartment 1 according to the present embodiment will be described. First,
A heat-expandable refractory material 8 having fire resistance is attached to the inner peripheral surface of the inner cylinder 7 in advance so as to extend in the circumferential direction. Then, the opening on the large diameter side of the outer cylinder 6 is set to the section A side (the right side in FIG. 1).
And the opening on the small diameter side is defined as the partition side B.
(Left side in FIG. 1) so that the fire protection compartment 1
The outer cylinder 6 is buried in the fire protection compartment 1 at the time of casting. next,
The sheath tube 4 is penetrated inside the outer tube 6, and the sheath tube 4 is inserted into the inner tube 7 from the large diameter side opening of the outer tube 6 to the inside of the large diameter side of the outer tube 6. The inner cylinder 7 is inserted while reducing its diameter. Then, between the inner peripheral surface of the inner cylinder 7 and the outer peripheral surface of the sheath tube 4 inserted therein, the heat-expandable refractory material 8 extends in the circumferential direction of the inner cylinder 7. Provided. At this time, the inner cylinder 7 expands in diameter by elastic recovery from the reduced diameter state, and the outer peripheral surface of the inner cylinder 7 closely contacts the inner peripheral surface of the outer cylinder 6. Then, a water supply / hot water supply pipe 9 and a power supply cable are inserted into the inside of the sheath tube 4. As described above, according to the present embodiment, a cylindrical shape is formed inside the copper outer cylinder 6 embedded in the fire protection compartment 1 so as to be in close contact with the inner peripheral surface of the outer cylinder 6. Is inserted, so that no gap is formed between the inner peripheral surface of the outer cylinder 6 and the outer peripheral surface of the inner cylinder 7. That is, since the outer peripheral surface of the inner cylinder 7 is in close contact with the inner peripheral surface of the outer cylinder 6, there is no need to fill the mortar or the like between the inner peripheral surface of the outer cylinder 6 and the outer peripheral surface of the inner cylinder 7. Between the inner tube 7 and the sheath tube 4, a thermally expandable refractory material 8 having thermal resistance and being in close contact with the inner tube 7 and the sheath tube 4 by thermal expansion is provided. It is provided so as to extend in the inner circumferential direction of the cylinder 7. Therefore, when a fire occurs in the meter box in the section A, the room temperature in the section A rises, and the thermally expandable refractory material 8 starts to expand. Then, the heat-expandable refractory material 8 comes into close contact with the outer peripheral surface of the sheath tube 4 and the inner peripheral surface of the inner cylinder 7, and closes the gap between the outer peripheral surface of the sheath tube 4 and the inner peripheral surface of the inner cylinder 7. Become. Therefore, it is possible to prevent the flame or smoke from spreading through the through portion 2 of the fire protection compartment to the adjacent compartment. Further, since the inner diameter of the outer cylinder 6 on the small diameter side is formed slightly larger than the outer diameter of the sheath tube 4, the sheath tube 4 inserted into the outer tube 6 is oriented in a direction orthogonal to the axial direction. Will be restricted. Also, in a normal state, a part of the outer peripheral surface of the sheath tube 4 is in contact with the surface of the heat-expandable refractory material 8.
And the inner peripheral surface on the small diameter side of the outer cylinder 6 make it difficult to separate from the through portion 2. Since the heat-expandable refractory material 8 is attached to the inner peripheral surface of the inner cylinder 7 so as to extend in the circumferential direction, the inner cylinder 7 is inserted inside the outer cylinder 6. The heat-expandable refractory material 8 is easily extended between the inner peripheral surface of the inner cylinder 7 and the outer peripheral surface of the sheath tube 4 inserted therein so as to extend in the inner peripheral direction of the inner cylinder 7. Can be provided. Further, since the inner cylinder 7 can be elastically reduced in diameter, and is expanded from this reduced diameter state by an elastic return force, and is in close contact with the inner peripheral surface of the outer cylinder 6 on the large diameter side. The inner cylinder 7 inserted inside the large diameter side of the outer cylinder 6 is installed inside the outer cylinder 6 so that the outer peripheral surface of the inner cylinder 7 always presses the inner peripheral surface of the outer cylinder 6. . Therefore, the outer peripheral surface of the inner cylinder 7 can be securely brought into close contact with the inner peripheral surface of the outer cylinder 6 on the large diameter side, and the inner cylinder 7 can be prevented from coming off from the inner side of the outer cylinder 6 on the large diameter side. The description contents in the present embodiment are as follows.
Modifications can be made as appropriate without departing from the spirit of the present invention.
For example, in the present embodiment, an example in which the present invention is applied to a case where a sheath tube is made to penetrate a wall is described. However, the present invention is also applied to a case where a sheath tube is made to penetrate a floor made of a refractory material. Is also good. As described above, according to the first aspect of the present invention, the inside of the non-combustible outer cylinder embedded in the fire protection compartment is
Since the incombustible inner cylinder that is in close contact with the inner peripheral surface of the outer cylinder is inserted, no gap is formed between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. Therefore, there is no need to fill mortar or the like between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. Furthermore, since the heat-expandable refractory material is provided between the inner tube and the sheath tube so as to extend in the inner circumferential direction of the inner tube,
This heat-expandable refractory material blocks the gap between the outer peripheral surface of the sheath tube and the inner peripheral surface of the inner cylinder, so that the flame or smoke spreads through the through portion of the fire protection compartment and spreads to the adjacent compartment. Can be prevented.
【図面の簡単な説明】
【図１】本発明の実施の形態の一例を示すもので、防火
区画体の貫通部の縦断面図である。
【図２】従来の防火処置工法を示した防火区画体の貫通
部の縦断面図である。
【図３】従来のＢＣＪ工法を示した防火区画体の貫通部
の縦断面図である。
【符号の説明】
１ 防火区画体
２ 貫通部
４ 鞘管
６ 外筒
７ 内筒
８ 熱膨張性耐火材BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of an embodiment of the present invention, and is a longitudinal sectional view of a penetration portion of a fire protection compartment. FIG. 2 is a vertical cross-sectional view of a through portion of a fire protection compartment showing a conventional fire protection treatment method. FIG. 3 is a vertical cross-sectional view of a through portion of a fire protection compartment showing a conventional BCJ method. [Description of Signs] 1 Fireproof compartment 2 Penetration part 4 Sheath tube 6 Outer cylinder 7 Inner cylinder 8 Thermally expandable refractory material
Claims (1)
体に、その厚さ方向に鞘管を貫通し、この貫通した部分
を防火処理してなる防火区画体の貫通部の防火構造であ
って、 前記防火区画体には、筒状をなす不燃性の外筒が、その
両端開口を前記防火区画体の両表面側にそれぞれ開口す
るようにして埋設されており、 前記外筒の内側には、この外筒の内周面に密接する筒状
をなし、前記鞘管が挿通される不燃性の内筒が挿入され
ており、 この内筒と、その内側に挿通された前記鞘管との間に
は、熱膨張することによって前記内筒と鞘管とに密着
し、かつ耐火性を有する熱膨張性耐火材が、前記内筒の
内周方向に延在するようにして設けられていることを特
徴とする防火区画体の貫通部の防火構造。Claims: 1. A fire prevention compartment formed by penetrating a sheath tube in a thickness direction of a fire prevention compartment such as a wall or a floor made of a refractory material and performing a fire treatment on the penetrated portion. In the fire protection structure of the penetration part of the body, in the fire protection compartment, a non-combustible outer cylinder having a tubular shape is buried such that both end openings are respectively opened on both surface sides of the fire protection compartment. Inside the outer cylinder, a non-combustible inner cylinder, which has a cylindrical shape closely contacting the inner peripheral surface of the outer cylinder and through which the sheath tube is inserted, is inserted. A heat-expandable refractory material having thermal resistance and being in close contact with the inner tube and the sheath tube by thermal expansion is provided between the inner tube and the inner tube. A fire protection structure for a penetration portion of a fire protection compartment, which is provided so as to extend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002036780A JP2003236007A (en) | 2002-02-14 | 2002-02-14 | Fire prevention structure for pierced part of fire prevention section unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002036780A JP2003236007A (en) | 2002-02-14 | 2002-02-14 | Fire prevention structure for pierced part of fire prevention section unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003236007A true JP2003236007A (en) | 2003-08-26 |
Family
ID=27778568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002036780A Pending JP2003236007A (en) | 2002-02-14 | 2002-02-14 | Fire prevention structure for pierced part of fire prevention section unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003236007A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016125930A (en) * | 2015-01-06 | 2016-07-11 | 三菱重工業株式会社 | Heat expansion refractory material life estimation method |
| JP2016195475A (en) * | 2015-03-31 | 2016-11-17 | 積水化学工業株式会社 | Protective tube for cable, and fire resistant structure |
| JP2020182375A (en) * | 2020-06-29 | 2020-11-05 | 積水化学工業株式会社 | Protective tube for cable, and fire resistant structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231981A (en) * | 1997-02-19 | 1998-09-02 | Furukawa Electric Co Ltd:The | Pipe member connecting method and pipe fitting used for it |
| JP2000346246A (en) * | 1999-06-04 | 2000-12-15 | Kubota Corp | Long object holding member and manufacture thereof |
| JP2001123563A (en) * | 1999-10-26 | 2001-05-08 | Tosetz Co Ltd | Placing form for forming fire-preventive partition through-hole and method for forming the same |
| JP2002005341A (en) * | 2000-06-23 | 2002-01-09 | Furukawa Techno Material Co Ltd | Fireproofing member for combustible long member passing part |
-
2002
- 2002-02-14 JP JP2002036780A patent/JP2003236007A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10231981A (en) * | 1997-02-19 | 1998-09-02 | Furukawa Electric Co Ltd:The | Pipe member connecting method and pipe fitting used for it |
| JP2000346246A (en) * | 1999-06-04 | 2000-12-15 | Kubota Corp | Long object holding member and manufacture thereof |
| JP2001123563A (en) * | 1999-10-26 | 2001-05-08 | Tosetz Co Ltd | Placing form for forming fire-preventive partition through-hole and method for forming the same |
| JP2002005341A (en) * | 2000-06-23 | 2002-01-09 | Furukawa Techno Material Co Ltd | Fireproofing member for combustible long member passing part |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016125930A (en) * | 2015-01-06 | 2016-07-11 | 三菱重工業株式会社 | Heat expansion refractory material life estimation method |
| JP2016195475A (en) * | 2015-03-31 | 2016-11-17 | 積水化学工業株式会社 | Protective tube for cable, and fire resistant structure |
| JP2020182375A (en) * | 2020-06-29 | 2020-11-05 | 積水化学工業株式会社 | Protective tube for cable, and fire resistant structure |
| JP7050861B2 (en) | 2020-06-29 | 2022-04-08 | 積水化学工業株式会社 | Cable protection tube and fireproof structure |
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