Fire-resistant structure

Abstract

Improve the fire resistance. 【Solution means】The fire-resistant structure includes a sleeve 220 inserted into the through-hole 200a, a first fire-resistant sheet 100' wound around the refrigerant pipe 210, a second fire-resistant sheet 100" wound adjacent thereto, and a filler 230 provided between these and the sleeve 220. The first and second fire-resistant sheets 100' and 100" are formed by providing a thermally expandable member 102 on a base material 101, the thermally expandable member 102 is wound toward the refrigerant pipe 210 side, and the thermally expandable member 102 is slidable on the refrigerant pipe 210.

Description

Technical Field

[0001] The present invention relates to a fire-resistant structure in a through-hole through which building pipes pass.

Background Art

[0002] As a fire prevention measure structure provided between a through-hole formed in a fire-resistant structure and a plurality of elongated bodies, there is known one provided with a heat-expandable fire-resistant sheet material including a heat-expandable fire-resistant material layer and an adhesive layer provided along the entire longitudinal direction. The heat-expandable fire-resistant sheet material is co-wound around a plurality of elongated bodies and is adhesively held along the outer surface shape of the bundle of the plurality of elongated bodies by the adhesive layer (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Even if the above-mentioned fire-resistant sheet material is wound around an elongated body, it is not always easy to enhance the fire-resistant performance, for example, when the fire-resistant structure is thin-walled. In order to increase the fire-resistant performance, it is conceivable to widen the width of the fire-resistant sheet material (lengthen the length in the center line direction of the elongated body), but such a fire-resistant sheet material tends to be costly.

[0005] The present invention has been made in view of the above points, and an object thereof is to increase the fire-resistant performance while keeping the cost low.

Means for Solving the Problems

[0006] To achieve the above object, The present invention is A fireproof structure in which a heat-expandable member that expands due to heat during a fire is provided between the inner peripheral surface of a through hole formed in a partition part of a building and the outer peripheral surface of a refrigerant pipe of an air conditioner inserted into the through hole, a sleeve inserted into the through hole, a strip-shaped first fireproof sheet wound around the outer peripheral surface of the refrigerant pipe, a strip-shaped second fireproof sheet arranged and wound around the outer peripheral surface of the refrigerant pipe so as to be adjacent to the first fireproof sheet in the center line direction of the refrigerant pipe, a filler provided between the first and second fireproof sheets and the inner peripheral surface of the sleeve, and comprising wherein each of the first and second fireproof sheets is formed by providing the heat-expandable member on a strip-shaped base material, and the heat-expandable member is wound around the refrigerant pipe with the heat-expandable member facing the refrigerant pipe side.

[0007] Accordingly, even without using a wide fireproof sheet, it is possible to easily increase the fireproof performance by lengthening the portion covered by the fireproof sheet in the long body.

Advantages of the Invention

[0008] In the present invention, it is possible to easily increase the fireproof performance while keeping the cost low.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses in any way. Also, the numerical values such as dimensions shown below are merely examples and are not limited thereto.

[0011] (Configuration of the refractory sheet 100) FIGS. 1 to 3 show the configuration of a refractory sheet 100 used in a refractory structure according to an embodiment of the present invention. This refractory sheet 100 is formed by providing a thermally expandable member 102 that expands due to heat during a fire on one surface side of a strip-shaped base material 101 made of, for example, an aluminum glass cloth. The refractory sheet 100 is formed, for example, in a strip shape with a width of 150 mm (A) and a length of 1200 mm (B), and is cut to an appropriate length for use during use. At one edge portion 101a in the width direction of the base material 101 (one edge on the center line direction of the refrigerant pipe 210 when wound around the refrigerant pipe 210 described later), the edge of the thermally expandable member 102 is provided so as to be the same. On the other hand, on the other edge portion 101b opposite to the one edge portion 101a, a base material exposed region 101c with a width of 25 mm (C) where the thermally expandable member 102 is not provided is formed. That is, the width of the thermally expandable member 102 is set to 125 mm (D). In addition, although not essential, on the base material 101 of the refractory sheet 100, for example, a blue wall reference line 103 and a red floor reference line 104, which are linear markings serving as positioning references when constructing on a wall or a floor as described later, are printed at positions 105 mm (E) or 73 mm (F) from the one edge portion 101a.

[0012] The above-mentioned thermally expandable member 102 may be a thermally expandable member used in a building, and the type is not particularly limited, but examples include members that expand due to heat during a fire. For example, a compound of expanded graphite and boric acid can be used. As this expanded graphite, one that expands, for example, 100 times or more when heated by a flame can be used. The properties of the thermally expandable member 102 are not particularly limited, but for example, they can have properties such that they do not drip over a long period of time, such as in a paste form or a paste-like form. Preferably, the thermally expandable member 102 is formed into a tape shape with a thickness of several millimeters and preferably has flexibility such that it can be bent when an external force is applied.

[0013] The thermally expandable member 102 having such properties can be obtained, for example, by mixing expanded graphite, borax, a plasticizer, etc. into a flexible rubber or a thermoplastic elastomer. Examples of the rubber include natural rubber, isoprene rubber, butadiene rubber, acrylic rubber, etc. Examples of the thermoplastic elastomer include styrene-based thermoplastic elastomers, olefin-based thermoplastic elastomers, etc. Further, as the thermally expandable member 102, for example, a butyl rubber sealing material having a thickness of 2 to 8 mm (4 mm is preferred) and containing expanded graphite is preferred.

[0014] (Fire-resistant structure) FIG. 4 shows a fire-resistant structure according to an embodiment of the present invention. Here, in FIG. 4, the dimensions in the thickness direction of the fire-resistant sheet 100 are exaggerated for convenience.

[0015] The above-mentioned fire-resistant sheet 100 is disposed and used between the inner peripheral surface of a through-hole 200a formed in a partition portion 200 such as a so-called thin wall (for example, having a thickness of about 42 mm or more) such as a single wall of a building such as an apartment house, and the outer peripheral surface of a refrigerant pipe 210 of an air conditioner inserted into the through-hole 200a. Here, what is inserted into the through-hole 200a is not limited to the refrigerant pipe 210 alone, and a water pipe, electrical wiring, etc. may also be inserted.

[0016] More specifically, for example, a steel sleeve 220 is fitted into the through-hole 200a of the partition portion 200. On the other hand, a fireproof sheet 100 is wound around the refrigerant pipe 210, and a filler 230 such as glass wool or rock wool, which is a heat insulating material, is filled between the inner peripheral surface of the sleeve 220 and the outer peripheral surface of the fireproof sheet 100.

[0017] Examples of the partition portion 200 include walls having fire resistance such as reinforced gypsum boards and ALC (autoclaved lightweight concrete), but are not limited thereto, and it may also be a floor. In the example shown in FIG. 4, the partition portion 200 is composed of two reinforced gypsum boards, and the thickness of one reinforced gypsum board is about 21 mm (42 mm (G) for two boards). By arranging the fireproof sheet 100 between the inner peripheral surface of the through-hole 200a and the outer peripheral surface of the refrigerant pipe 210, it is possible to suppress the spread of fire through the through-hole 200a during a fire. The partition portion 200 extends vertically. The left side of FIG. 4 from the partition portion 200 is one room R1, and the right side of FIG. 4 from the partition portion 200 is the other room R2. Therefore, one room R1 and the other room R2 are partitioned by the partition portion 200. A through-hole 200a penetrating horizontally is formed at a predetermined portion of the partition portion 200. One room R1 and the other room R2 can communicate with each other through the through-hole 200a. The cross-section of the through-hole 200a is substantially circular.

[0018] The sleeve 220 is set to have a length of, for example, 105 mm (H) and is arranged such that the end face on the room R1 side is flush with the surface of the partition portion 200.

[0019] On the outer peripheral surfaces of the refrigerant pipe 210 and the like, two fireproof sheets 100, namely, the first fireproof sheet 100' and the second fireproof sheet 100", are wound around such that their respective thermal expansion members 102 are adjacent to each other in the center line direction of the refrigerant pipe 210. More specifically, the first fireproof sheet 100' is wound such that one side edge portion 101a is located 20 mm (I) from the end surface on the room R1 side of the sleeve 220. Further, the second fireproof sheet 100" is wound such that the base material 101 of the base material exposed region 101c covers the portion of one side edge portion 101a of the first fireproof sheet 100'. The above positioning can be easily performed by aligning the wall reference line 103 provided on the fireproof sheet 100 as described above with the end surface on the room R1 side of the sleeve 220. These first fireproof sheet 100' and second fireproof sheet 100" are made not to unwind, for example, by a non-combustible aluminum tape (not shown) having an adhesive layer provided on a base material having an aluminum foil, or are made not to separate from each other. On the other hand, the thermal expansion members 102 of these first fireproof sheet 100' and second fireproof sheet 100" are provided slidably with respect to the refrigerant pipe 210.

[0020] With the above fireproof structure, it is possible to easily increase the fireproof performance by lengthening the portion covered by the fireproof sheet in the long body without using a wide fireproof sheet. Therefore, for example, when a fire breaks out in one room R1, it is possible to make it difficult for the heat to be transmitted to the room R2 and also to easily keep the cost low.

[0021] Also, since the thermal expansion members 102 of the first fireproof sheet 100' and the second fireproof sheet 100" are provided slidably with respect to the refrigerant pipe 210, even if the refrigerant pipe 210 expands and contracts in response to changes in the operating state such as the start and stop of the operation of the air conditioner, the first fireproof sheet 100' and the second fireproof sheet 100" are less likely to shift with respect to the partition portion 200, and thus it is possible to easily suppress the detachment.

[0022] Further, the second refractory sheet 100” is provided such that the base material 101 of the base material exposed area 101c covers the portion of one side edge 101a of the first refractory sheet 100’. Thus, the two refractory sheets 100, i.e., the first refractory sheet 100’ and the second refractory sheet 100”, can be easily wound around the refrigerant pipe 210 such that their respective thermal expansion members 102 are adjacent to each other in the center line direction of the refrigerant pipe 210.

[0023] Furthermore, by providing the first refractory sheet 100’ and the second refractory sheet 100” adjacent to each other as described above, it is possible to easily enhance the fireproof performance even in the partition portion 200 of a single wall. That is, even without using a particularly wide refractory sheet 100, it is possible to easily reduce costs, for example, by using a refractory sheet 100 used in a hollow wall or the like.

[0024] In addition, by providing a wall reference line 103 and a floor reference line 104 on the refractory sheet 100, the positioning work can be facilitated.

Explanation of Reference Numerals

[0025] 100 Refractory sheet 100’ First refractory sheet 100” Second refractory sheet 101 Base material 101a One side edge 101b The other side edge 101c Base material exposed area 102 Thermal expansion member 103 Wall reference line 104 Floor reference line 200 Partition portion 200a Through hole 210 Refrigerant pipe 220 Sleeve 230 Filling material

Claims

1. A fireproof structure in which a thermally expandable member that expands due to heat during a fire is provided between an inner peripheral surface of a through hole formed in a partition of a building and an outer peripheral surface of a refrigerant pipe of an air conditioner inserted into the through hole, A sleeve that is inserted into the through hole; A band-shaped first fireproof sheet wrapped around the outer peripheral surface of the refrigerant pipe; A band-shaped second fireproof sheet is wound around the outer circumferential surface of the refrigerant pipe so as to be adjacent to the first fireproof sheet in a center line direction of the refrigerant pipe; a filler provided between the second fireproof sheet and the inner circumferential surface of the sleeve; Equipped with The first and second fireproof sheets each include a band-shaped base material and the thermal expansion member is provided on the band-shaped base material, and the thermal expansion member is wound around the refrigerant pipe with the thermal expansion member facing the refrigerant pipe side, A fire-resistant structure characterized in that one end face of the sleeve is positioned flush with the surface of the partition of the building, the other end face of the second fire-resistant sheet is located on the back side of the back side of the partition of the building, and the first fire-resistant sheet is positioned outside the front side of the surface of the partition of the building.

2. The fire-resistant structure of claim 1, The fireproof structure is characterized in that the thermal expansion member is slidably provided on the refrigerant pipe.

3. The fire-resistant structure of claim 1, A fire-resistant structure characterized in that the second fire-resistant sheet has a substrate exposed area where the thermally expandable member is not provided at an edge portion on one side of the center line direction of the refrigerant piping in the band-shaped substrate, and the substrate exposed area is arranged so as to overlap the thermally expandable member in the first fire-resistant sheet.

4. The fire-resistant structure of claim 1, A fire-resistant structure in which the compartments of the building are thin-walled.

5. The fire-resistant structure of claim 1, A fire-resistant structure characterized in that a linear marking is provided on the first or second fire-resistant sheet at a position corresponding to the end face of the sleeve.

Images