Fire prevention measures and fire prevention structures

Abstract

To achieve a fire-resistant structure that can provide stable performance in the event of a fire, while avoiding high costs, and with good workability. [Solution] The fire prevention method includes a wrapping step of wrapping a fire-resistant sheet member (10) containing a heat-expandable fire-resistant material around a long body (7) inserted through a through hole (6H) on the outside of the partition body (6); a covering step of covering the portion of the long body (7) around which the fire-resistant sheet member (10) is wrapped with a sleeve member (20) having a filler (30) on its inner surface; and an insertion step of inserting the fire-resistant sheet member (10), the filler (30), and the sleeve member (20) together into the through hole (6H) along the outer surface of the long body (7).

Description

Technical Field

[0001] The present invention relates to a fire prevention measure method and a fire prevention measure structure.

Background Art

[0002] Generally, the interior space of a building is partitioned into a plurality of room spaces by partitioning bodies such as walls, floors, and ceilings. When a fire occurs in a certain room space, a fireproof partitioning body may be used to prevent the fire from spreading to other room spaces. In this case, when a long member such as a pipe or a cable is inserted through a through-hole formed in the partitioning body, there is a possibility that the flame may pass through the gap between the through-hole and the long member and spread, so it is necessary to take fire prevention measures for this through-hole.

[0003] An example of such a fire prevention measure method is disclosed in Japanese Patent Application Laid-Open No. 2020-517310 (Patent Document 1). In the fire prevention measure method of Patent Document 1, a sleeve member (sleeve 1) having a refractory sheet member (expansion strip 6) containing a thermally expandable refractory material fixed to its inner surface is inserted into a through-hole (opening 5) surrounding the pipe (cable bundle 9) and fixed to the partitioning body (partition wall 4). Thereafter, the region between the sleeve member and the pipe is covered with a non-combustible sheet (glass fiber tissue hose 7) across their outer surfaces.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, with this fire prevention method, a space (opening 2) exists between the fire-resistant sheet material containing thermally expandable fire-resistant material and the piping, making it difficult to ensure stable performance in the event of a fire. While this can be improved by using fire-resistant sheet material containing high-performance thermally expandable fire-resistant material, it also presents the problem of increased costs.

[0006] Therefore, it is desirable to create a fire-resistant structure that can provide stable performance in the event of a fire, while avoiding high costs, and that is easy to construct. [Means for solving the problem]

[0007] The fire prevention method according to the present invention is A fire protection method for creating a fire-resistant structure in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, With the elongated body inserted through the through-hole, a wrapping step is performed in which a fire-resistant sheet member containing a heat-expandable fire-resistant material is wrapped around the portion of the elongated body that is on the outside of the partition; A covering step in which a sleeve member with a flammable filler arranged on its inner surface is placed over the portion of the elongated body around which the fire-resistant sheet member is wrapped; An insertion step of inserting the fire-resistant sheet member, the filler material, and the sleeve member into the through hole all at once along the outer surface of the elongated body, Includes.

[0008] With this configuration, the fire-resistant sheet material is directly wrapped around the long body during the wrapping process, so that the long body and the heat-expandable fire-resistant material are close together in the final fire-resistant structure, allowing for stable performance in the event of a fire. There is less need to use fire-resistant sheet material containing high-performance heat-expandable fire-resistant material, thus avoiding high costs. In realizing the fire-resistant structure, after the wrapping process, a sleeve material with a flammable filler material on its inner surface is placed over the fire-resistant sheet material in the covering process, and then the insertion process is performed. In this insertion process, the fire-resistant sheet material, filler material, and sleeve material are inserted into the through-hole all at once, resulting in good workability. Thus, with this configuration, a fire-resistant structure that can exhibit stable performance in the event of a fire can be realized with good workability while avoiding high costs.

[0009] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited by the examples of preferred embodiments described below.

[0010] As one aspect, In the covering step, it is preferable to cover the filler and the fire-resistant sheet member with the sleeve member so that they are in contact.

[0011] With this configuration, the fire-resistant sheet member, the filler material, and the sleeve member are already in contact with each other when the covering process is completed. Therefore, during the insertion process, the fire-resistant sheet member, the filler material, and the sleeve member can be easily inserted into the through-hole all at once. Thus, workability can be further improved.

[0012] As one aspect, It is preferable to perform the insertion step while the filler is compressed in the radial direction.

[0013] With this configuration, the diameter of the sleeve member is restricted to below a certain level, and the repulsive force of the compressed filler makes it easier to integrate the sleeve member, filler, and fire-resistant sheet member. Therefore, in the insertion process, the simultaneous insertion of the fire-resistant sheet member, filler, and sleeve member into the through hole can be made even easier, further improving workability.

[0014] As one aspect, Preferably, the sleeve member is formed by rolling a thin metal sheet, and by overlapping its ends, it becomes a cylindrical shape with an outer diameter less than or equal to the inner diameter of the through hole.

[0015] With this configuration, the sleeve member can be easily placed over the elongated body and the fire-resistant sheet member from between their ends while the elongated body is inserted through the through-hole. After placing it over the elongated body and the fire-resistant sheet member, the ends are overlapped to form a cylindrical shape with an outer diameter less than or equal to the inner diameter of the through-hole, thereby enabling proper insertion.

[0016] As one aspect, It is preferable that the coefficient of friction between the fire-resistant sheet member and the elongated body is smaller than the coefficient of friction between the fire-resistant sheet member and the filler.

[0017] With this configuration, the fire-resistant sheet member and the filler are relatively less slippery, making it easy to integrate the sleeve member, filler, and fire-resistant sheet member. In addition, because the fire-resistant sheet member and the elongated body are relatively slippery, the integrated sleeve member, filler, and fire-resistant sheet member can be easily inserted into the through-hole along the outer surface of the elongated body.

[0018] As one aspect, Preferably, the fire-resistant sheet member comprises a sheet-like molded body mainly composed of a heat-expandable fire-resistant material, and a film body laminated on the surface of the sheet-like molded body that faces the elongated body.

[0019] According to this configuration, a configuration in which the coefficient of friction between the refractory sheet member and the long member is smaller than the coefficient of friction between the refractory sheet member and the filler can be easily realized.

[0020] The fire prevention measure structure according to the present invention is a fire prevention measure structure provided in a gap between a through hole formed in a partition of a building and a long member inserted through the through hole, a refractory sheet member including a thermally expandable refractory material, wound around the long member inside the through hole, a sleeve member inserted through the through hole, a combustible filler disposed on the inner surface of the sleeve member and arranged to contact the refractory sheet member, and a fire prevention measure structure including the same.

[0021] According to this configuration, the refractory sheet member is directly wound around the long member, the sleeve member is inserted through the through hole, and the filler disposed on the inner surface of the sleeve member contacts the refractory sheet member. Therefore, the thermally expandable refractory material can be stably held near the long member. Thus, the state in which the long member and the thermally expandable refractory material are close to each other can be stably maintained, and stable performance can be exhibited during a fire. The need to use a refractory sheet member including a high-performance thermally expandable refractory material is low, and an increase in cost can be avoided. As described above, according to the present configuration, a fire prevention measure structure that can exhibit stable performance during a fire while avoiding an increase in cost can be realized.

[0022] Further features and advantages of the present invention will become more apparent from the following illustrative and non-limiting description of embodiments, taken in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0023] [Figure 1] Perspective view of the fire prevention measure structure of the embodiment [Figure 2] Front view of the refractory sheet member [Figure 3] Cross-sectional view of the refractory sheet member [Figure 4] Perspective view of the sleeve unit [Figure 5] Cross-sectional view of the sleeve unit [Figure 6] Perspective view showing one aspect of the winding process. [Figure 7] Perspective view showing one aspect of the coating process. [Figure 8] Perspective view showing one aspect of the insertion process. [Figure 9] A partial cross-sectional view showing one aspect of the insertion process. [Figure 10] Partial cross-sectional view of a fire prevention structure [Modes for carrying out the invention]

[0024] Embodiments of fire protection structures and fire protection methods will be described with reference to the drawings. As shown in Figure 1, the fire protection structure of this embodiment is provided in the gap G (see Figure 6, etc.) between a through-hole 6H formed in a building compartment 6 and a long body 7 inserted through the through-hole 6H. This fire protection structure is realized using a fire protection unit 1.

[0025] In this embodiment, the longitudinal direction of the elongated body 7 is referred to as the "axial direction," the direction perpendicular to the longitudinal direction of the elongated body 7 is referred to as the "radial direction," and the direction that circles around the elongated body 7 is referred to as the "circumferential direction." In the following description, the orientation of each component constituting the fire protection unit 1 may be described in terms of the state in which the fire protection unit 1 is fixed to the compartment 6.

[0026] The partition 6 to which the fire-resistant structure is applied is a fire-resistant structure that divides the space within a building into multiple room spaces. The partition 6 may be, for example, a wall that divides multiple room spaces horizontally (see Figure 1), or a floor (or ceiling) that divides multiple room spaces vertically. Examples of partition 6 include reinforced concrete (RC), autoclaved lightweight concrete (ALC), and hollow walls (including gypsum board, etc.). Of course, structures other than those listed above may also be used as partition 6.

[0027] As shown in Figure 1, the partition 6 has a through-hole 6H that penetrates the partition 6 in its thickness direction (horizontal direction in the illustrated example). In this embodiment, a circular through-hole 6H is formed. However, the specific shape of the through-hole 6H is not limited to this configuration, and may be various shapes such as elliptical, oblong, and polygonal shapes.

[0028] A long body 7 is inserted through the through-hole 6H of the compartment 6. The long body 7 has a long structure extending in one direction, such as a linear body, a tubular body, or a strip-shaped body. An example of such a long body 7 is refrigerant piping for an air conditioning system. In this case, the long body 7 may include a metal piping member for refrigerant circulation and a synthetic resin covering material (insulating material) that covers the periphery of the piping member. Note that the long body 7 is not limited to refrigerant piping for an air conditioning system, but may also be, for example, water supply and drainage piping or electrical cables.

[0029] Furthermore, the long body 7 may be inserted into the through hole 6H individually as a single unit, or multiple units may be inserted into the through hole 6H as a bundle.

[0030] The fire protection unit 1 comprises a fire-resistant sheet member 10 and a sleeve unit 2. The sleeve unit 2 comprises a sleeve member 20 and a filler material 30. The sleeve member 20 and the filler material 30 constituting the sleeve unit 2 are fixed to each other and integrated. Therefore, the fire protection unit 1 of this embodiment comprises a fire-resistant sheet member 10 and a separate, integrated sleeve member 20 and filler material 30.

[0031] The fire-resistant sheet member 10 is a sheet-like member containing a thermally expandable fire-resistant material. The thermally expandable fire-resistant material is a member that has thermal expandability (the property of increasing in volume when heated) and fire resistance (the property of being able to withstand heat and having a high melting point, making it difficult to burn). As the thermally expandable fire-resistant material, any known material can be used without particular limitation, for example, a putty-like member (thermally expandable putty-like fire-resistant material) can be used. Furthermore, in this embodiment, the thermally expandable fire-resistant material also has flexibility (the property of being able to bend) in addition to thermal expandability and fire resistance. As such a thermally expandable fire-resistant material, for example, one that includes a resin component having flexibility and fire resistance and a thermally expandable filler kneaded into this resin component can be used. Furthermore, the thermally expandable fire-resistant material may also have adhesiveness (the property of being sticky and easily adhering to other substances).

[0032] The heat-expandable fire-resistant material contained in the fire-resistant sheet member 10 expands when heated, for example, by the heat of flames during a fire. The thermal expansion coefficient of the heat-expandable fire-resistant material may be, for example, 2 to 40 times.

[0033] As shown in Figures 2 and 3, the fire-resistant sheet member 10 of this embodiment has a sheet-like molded body 12 and a film body 14 laminated on the sheet-like molded body 12. In this embodiment, the fire-resistant sheet member 10 further has a non-combustible sheet 16 integrated with the sheet-like molded body 12.

[0034] The sheet-like molded body 12 is a molded body mainly composed of a heat-expandable fire-resistant material and is a substantive element of the fire-resistant sheet member 10. The sheet-like molded body 12 is formed in the shape of a rectangular sheet having a predetermined width and predetermined length. The width of the sheet-like molded body 12 is set to be approximately the same as the thickness of the partition body 6 (it may be slightly longer or shorter). The length of the sheet-like molded body 12 is set to be sufficiently longer than the circumference of the elongated body 7 so that it can be wrapped around the entire circumference of the elongated body 7. Furthermore, the sheet-like molded body 12 is formed in the shape of a thick sheet having a predetermined thickness. The thickness of the sheet-like molded body 12 is set to, for example, about 1 mm to 8 mm.

[0035] The film body 14 is laminated on at least one surface of the sheet-like molded body 12. The film body 14 is laminated entirely on at least one of two surfaces in the thickness direction. The film body 14 may be laminated on only one surface of the sheet-like molded body 12, or on both surfaces. In the latter case, the film body 14 formed in a bag shape may cover the sheet-like molded body 12, so that the film body 14 is laminated on both surfaces of the sheet-like molded body 12. In this embodiment, the film body 14 is laminated on only one surface of the sheet-like molded body 12.

[0036] For example, the film body 14 can be made of a resin film such as polyethylene, polypropylene, polyvinyl chloride, or polyethylene terephthalate. By laminating such a film body 14 onto the sheet-like molded body 12, the slipperiness of the fire-resistant sheet member 10 can be improved even if the heat-expandable fire-resistant material that constitutes the sheet-like molded body 12 is adhesive.

[0037] The non-combustible sheet 16 is integrated with the sheet-like molded body 12 at least one end in the width direction of the sheet-like molded body 12. In this embodiment, the non-combustible sheet 16 is integrated with the side of the sheet-like molded body 12 opposite to the side to which the film body 14 is integrated. The non-combustible sheet 16 may be integrated only near one end in the width direction of the sheet-like molded body 12, or it may be integrated with the entire sheet-like molded body 12. Note that integration of the non-combustible sheet 16 with the sheet-like molded body 12 means that in addition to the non-combustible sheet 16 and the sheet-like molded body 12 being directly fixed together, the non-combustible sheet 16 and the sheet-like molded body 12 are fixed together via other members (for example, the film body 14 when the film body 14 is laminated on both sides of the sheet-like molded body 12).

[0038] The non-combustible sheet 16 extends outward from one end of the sheet-like molded body 12 in the width direction. The extension length of the non-combustible sheet 16 from the end of the sheet-like molded body 12 may be, for example, about 1 / 10 to 1 / 2 of the width of the sheet-like molded body 12. In addition, slits 17 are formed at predetermined intervals at the tip of the non-combustible sheet 16 (the side opposite to the side integrated with the sheet-like molded body 12).

[0039] As the non-combustible sheet 16, for example, a metal sheet such as aluminum foil, a non-metallic fiber sheet such as glass cloth, and a composite of a metal sheet and a non-metallic fiber sheet such as aluminum glass cloth can be used.

[0040] As shown in Figures 4 and 5, the sleeve unit 2 comprises a sleeve member 20 and a filler material 30 integrated with the sleeve member 20.

[0041] The sleeve member 20 is formed by rolling a thin metal sheet 21. For example, stainless steel, aluminum, copper, and various alloys can be used as the metal material constituting the sleeve member 20. In an unloaded state, the circumferential ends 22 of the sleeve member 20 are spaced apart from each other, forming a C-shape when viewed from the axial direction. In the unloaded state, the outer diameter of the sleeve member 20 is approximately the same as, or slightly larger than, the inner diameter of the through hole 6H. Furthermore, the axial length of the sleeve member 20 is set to be approximately the same as the width of the sheet-like molded body 12 (it may be slightly longer or shorter).

[0042] Because the sleeve member 20 is C-shaped in the unloaded state, the sleeve member 20 can be attached to the elongated body 7 from the outside while the elongated body 7 is inserted through the through hole 6H. The sleeve member 20 can also be made cylindrical with an outer diameter less than or equal to the inner diameter of the through hole 6H by an operator applying force to overlap the ends 22. By making the sleeve member 20 cylindrical with an outer diameter less than or equal to the inner diameter of the through hole 6H, the sleeve member 20 can be inserted into the through hole 6H along the axial direction.

[0043] The filler material 30 is arranged on the inner surface of the sleeve member 20. When the filler material 30 is attached to the elongated body 7 together with the sleeve member 20, it fills the annular space between the sleeve member 20 and the elongated body 7. For this reason, it is preferable that the filler material 30 is a material that is somewhat bulky. On the other hand, as described above, in order to allow the sleeve member 20 to be inserted into the through hole 6H, the sleeve member 20 needs to be cylindrical with an outer diameter less than or equal to the inner diameter of the through hole 6H. For this reason, it is preferable that the filler material 30 is a material that can be easily compressed when an external force is applied. Furthermore, from the viewpoint of forming a space to accommodate the heat-expandable fire-resistant material that expands due to heat in the event of a fire, it is preferable that the filler material 30 is a flammable material. From this viewpoint, it is preferable to use a resin foam material such as polyurethane foam or polystyrene foam as the filler material 30.

[0044] The filler material 30 is fixed to the inner surface of the sleeve member 20, for example, via an adhesive layer. In this embodiment, the filler material 30 is fixed to the sleeve member 20 over its entire axial length. The axial length of the filler material 30 is set to be approximately the same as the axial length of the sleeve member 20 (it may be slightly longer or shorter). In this embodiment, the filler material 30 is fixed with its circumferential end 32 aligned with the circumferential end 32 of the sleeve member 20. Because it is fixed to the inner surface of the sleeve member 20, the filler material 30 is also C-shaped when viewed from the axial direction in an unloaded state. Furthermore, the filler material 30 can also be made cylindrical by an operator applying force through the sleeve member 20 to overlap the end 32.

[0045] The fire protection method implemented using the fire protection unit 1 of this embodiment includes a wrapping step, a covering step, and an insertion step. These are performed in the order of wrapping step → covering step → insertion step. The fire protection method also further includes a fixing step, and the fixing step may be performed after the insertion step.

[0046] The wrapping process involves wrapping the fire-resistant sheet member 10 around the elongated body 7. The wrapping process is performed when a through-hole 6H has been formed in the compartment 6 and the elongated body 7 has already been inserted through the through-hole 6H. In the wrapping process, as shown in Figure 6, the fire-resistant sheet member 10 is wrapped around the portion of the elongated body 7 that is outside the compartment 6 (preferably the portion that is near the compartment 6) that has been inserted through the through-hole 6H. At this time, if multiple elongated bodies 7 are bundled together and inserted through the through-hole 6H as shown in the example, it is preferable to wrap the fire-resistant sheet member 10 in such a way that it fills as much as possible the V-shaped valley space formed between the elongated bodies 7.

[0047] Furthermore, in the winding process, the fire-resistant sheet member 10 is wound around the elongated body 7 such that the side with the laminated film body 14 faces inward (towards the elongated body 7). In this way, the coefficient of friction (static friction coefficient and dynamic friction coefficient) between the fire-resistant sheet member 10 and the elongated body 7 can be made relatively smaller, and the sliding of the fire-resistant sheet member 10 against the elongated body 7 can be improved.

[0048] Furthermore, in the winding process, the fire-resistant sheet member 10 is wound around the elongated body 7 in a orientation such that the side with the non-combustible sheet 16 extending away from the partition body 6.

[0049] The covering process involves covering the portion of the elongated body 7 around which the fire-resistant sheet member 10 is wrapped with the sleeve unit 2. In the covering process, as shown in Figure 7, the sleeve unit 2 is placed over the elongated body 7 and the fire-resistant sheet member 10 wrapped around it on the outside of the partition 6 (preferably in the vicinity of the partition 6). In this embodiment, the sleeve unit 2 is placed so that the filler material 30 fixed to the inner surface of the sleeve member 20 and the fire-resistant sheet member 10 wrapped around the elongated body 7 are in contact. If the opening is narrow, the end parts 22 can be elastically deformed to separate them and widen the opening.

[0050] In this embodiment, the covering step includes a step (deformation step) in which the ends 22 of the sleeve member 20 are overlapped and deformed into a cylindrical shape with an outer diameter less than or equal to the inner diameter of the through hole 6H. In this deformation step, the filler material 30 also becomes cylindrical as its ends 32 overlap. In this state, the filler material 30 is compressed radially between the elongated body 7 and the fire-resistant sheet member 10 wrapped around it and the sleeve member 20. Then, due to the repulsive force of the compressed filler material 30, the filler material 30 and the fire-resistant sheet member 10 press against each other. Also, the fire-resistant sheet member 10 comes into contact with the outer surface of the elongated body 7.

[0051] In this embodiment, by using a resin foam material (specifically, polyurethane foam) as the filler 30, the coefficient of friction (static friction coefficient and dynamic friction coefficient) between the fire-resistant sheet member 10 and the filler 30 is relatively large. In particular, the coefficient of friction (static friction coefficient and dynamic friction coefficient) between the fire-resistant sheet member 10 and the filler 30 is larger than the coefficient of friction (static friction coefficient and dynamic friction coefficient) between the fire-resistant sheet member 10 and the elongated body 7. Therefore, as described above, the fire-resistant sheet member 10, the filler 30, and the sleeve member 20 can be handled as a single unit while the fire-resistant sheet member 10 slides well against the elongated body 7.

[0052] The insertion process involves inserting the fire-resistant sheet member 10, the filler material 30, and the sleeve member 20 into the through hole 6H. In the insertion process, as shown in Figures 8 and 9, the fire-resistant sheet member 10, the filler material 30, and the sleeve member 20 are inserted into the through hole 6H all at once along the outer surface of the elongated body 7. As described above, with the filler material 30 compressed radially, the filler material 30 and the fire-resistant sheet member 10 press against each other, allowing the fire-resistant sheet member 10, the filler material 30, and the sleeve member 20 to be handled as a single unit, thus making the insertion process easy to perform. In particular, the insertion process can be easily performed even when the gap G between the through hole 6H and the elongated body 7 is small.

[0053] After inserting the fire-resistant sheet member 10, filler material 30, and sleeve member 20 into the through-hole 6H all at once, the worker may release the force applied to make the sleeve member 20 cylindrical with an outer diameter less than or equal to the inner diameter of the through-hole 6H. The sleeve member 20 then expands within the through-hole 6H to return to its original shape, and its axial position is determined by pressing it against the inner surface of the through-hole 6H. The filler material 30 remains compressed and, supported from the radially outer side by the sleeve member 20 pressed against the inner surface of the through-hole 6H, presses the fire-resistant sheet member 10 towards the elongated body 7. This also stabilizes the axial position of the fire-resistant sheet member 10.

[0054] In this embodiment, the insertion step includes inserting the fire-resistant sheet member 10, the filler 30, and the sleeve member 20 into the through hole 6H all at once, and then aligning the non-combustible sheet 16 remaining outside the partition body 6 at the rear end in the insertion direction along the outer surface of the elongated body 7 (shielding step). In this shielding step, the non-combustible sheet 16 is aligned along the outer surface of the elongated body 7 to cover any small gaps that may occur between the elongated body 7 and the fire-resistant sheet member 10.

[0055] In this case, if multiple long pieces 7 are bundled together, it is preferable to cover the V-shaped valley space formed between the long pieces 7 with the portion between adjacent slits 17 at the leading edge of the non-combustible sheet 16.

[0056] The fixing process involves fixing the sleeve member 20 to the partition 6 as needed. In the fixing process, the sleeve member 20 is fixed to the partition 6 using fasteners such as screws or adhesives. Alternatively, the sleeve member 20 may be fixed to the partition 6 using putty or the like.

[0057] The fire-resistant structure realized in this way, as shown in Figures 1 and 10, comprises a fire-resistant sheet member 10 wrapped around a long body 7 inside a through hole 6H, a sleeve member 20 inserted through the through hole 6H, and a filler material 30 filled between the fire-resistant sheet member 10 and the sleeve member 20. The fire-resistant sheet member 10 has a sheet-like molded body 12 and a film body 14 laminated on at least one of its surfaces, and is wrapped around the long body 7 with the film body 14 in contact with the long body 7. The sleeve member 20 has its ends 22 overlapping to form a cylindrical shape and is inserted through the through hole 6H in a state of pressure contact with the inner surface of the through hole 6H. The filler material 30 is fixed to the inner surface of the sleeve member 20 and is arranged to be in contact with the fire-resistant sheet member 10 in a compressed state.

[0058] In this configuration, the fire-resistant sheet member 10 and the elongated body 7 are in direct contact, and the compressed filler 30 presses the fire-resistant sheet member 10 against the elongated body 7, stabilizing the axial position of the fire-resistant sheet member 10. Therefore, the thermally expandable fire-resistant material can be stably held near the elongated body 7. Maintaining a stable close relationship between the elongated body 7 and the thermally expandable fire-resistant material allows for stable performance in the event of a fire. The need to use a fire-resistant sheet member 10 containing high-performance thermally expandable fire-resistant material is reduced, thus avoiding increased costs. Consequently, a fire-prevention structure that can exhibit stable performance in the event of a fire can be realized while avoiding increased costs.

[0059] [Other Embodiments] (1) In the above embodiment, the description mainly assumed a configuration in which the fire-resistant sheet member 10, sleeve member 20, and filler 30 are all formed to be approximately the same size as the compartment 6 in terms of axial dimensions. However, the description is not limited to such a configuration, and at least one of the fire-resistant sheet member 10, sleeve member 20, and filler 30 may be formed to a different axial size than the compartment 6. For example, the fire-resistant sheet member 10 may be formed to be shorter in the axial direction than the compartment 6, within a range that does not substantially affect the fire-resistant performance. Also, the sleeve member 20 and filler 30 may be formed to be longer in the axial direction than the compartment 6. The axial dimensions of the fire-resistant sheet member 10, sleeve member 20, and filler 30 can each be set independently.

[0060] (2) In the above embodiment, the axial length of the sleeve member 20, the axial length of the filler 30, and the width of the sheet-like molded body 12 are approximately the same, and a configuration in which they are arranged in the same axial position in the final fire protection structure has been described as an example. However, the configuration is not limited to such a configuration, and for example, the filler 30 and the sheet-like molded body 12 may be arranged in a positional relationship in which one encloses the other in the axial direction. Alternatively, the filler 30 and the sheet-like molded body 12 may be arranged in a positional relationship in which they partially overlap in the axial direction but are offset from each other. In some cases, the filler 30 and the sheet-like molded body 12 may be arranged touching at one point in the axial direction, or they may be arranged apart in the axial direction.

[0061] (3) In the above embodiment, a configuration was described as in which the friction coefficient between the fire-resistant sheet member 10 and the elongated body 7 is smaller than the friction coefficient between the fire-resistant sheet member 10 and the filler 30, depending on the material of the film body 14 and the filler 30 contained in the fire-resistant sheet member 10. However, the configuration is not limited to such a configuration, and an adjustment layer for adjusting the friction coefficient may be provided on the surface of the fire-resistant sheet member 10 (the surface on the elongated body 7 side / the surface on the filler 30 side) by attaching it or the like.

[0062] (4) In the above embodiment, the description mainly assumed a configuration in which the non-combustible sheet 16 is fully integrated with the sheet-like molded body 12. However, the description is not limited to such a configuration, and the non-combustible sheet 16 may be integrated only near the edges of the sheet-like molded body 12. In such a configuration, a part of the sheet-like molded body 12 on the side of the filler 30 will be exposed, so if the heat-expandable fire-resistant material is adhesive, the fire-resistant sheet member 10 and the filler 30 can be made even less slippery.

[0063] (5) In the above embodiment, a configuration in which a plurality of slits 17 are formed at the tip of the non-combustible sheet 16 of the fire-resistant sheet member 10 was described as an example. However, the configuration is not limited to such a configuration, and the slits 17 do not need to be formed.

[0064] (6) In the above embodiment, a configuration in which the fire-resistant sheet member 10 has a non-combustible sheet 16 was described as an example. However, the fire-resistant sheet member 10 is not limited to such a configuration, and the non-combustible sheet 16 may not be provided on the fire-resistant sheet member 10.

[0065] (7) In the above embodiment, a configuration in which the sleeve member 20 is formed of a thin metal sheet 21 was described as an example. However, the configuration is not limited to such a configuration, and the sleeve member 20 may be formed of a composite of a metal material and a resin material, for example. In this case, the metal material can be, for example, stainless steel, aluminum, copper, and various alloys, and the resin material can be, for example, polyethylene, polypropylene, polyvinyl chloride, etc. In this case, the sleeve member 20 may be formed in the shape of a sleeve by laminating a non-combustible material such as a thin metal sheet or aluminum glass cloth on the surface of a sheet-like resin material. Alternatively, the sleeve member 20 may be formed by attaching a non-combustible material such as a thin metal sheet or aluminum glass cloth to the surface of a pre-molded resin sleeve.

[0066] (8) In the above embodiment, a configuration in which the filler 30 is fixed to the sleeve member 20 over the entire axial area was described as an example. However, the configuration is not limited to such a configuration, and for example, the filler 30 may be fixed only to both ends of the sleeve member 20 in the axial direction. In this case, as long as the fire-resistant sheet member 10, the filler 30, and the sleeve member 20 can be inserted into the through hole 6H all at once during the insertion process, the filler 30 does not necessarily have to be in contact with the fire-resistant sheet member 10 wrapped around the elongated body 7 during the covering process.

[0067] (9) In the above embodiment, the insertion process was described as an example in which the filler material 30 is compressed radially. However, the system is not limited to such an embodiment, and the insertion process may be performed in an uncompressed state of the filler material 30 as long as the fire-resistant sheet member 10, the filler material 30, and the sleeve member 20 can be inserted all at once.

[0068] (10) The configurations disclosed in each of the above-described embodiments (including the above-described embodiments and other embodiments; the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, insofar as they do not cause a conflict. With respect to other configurations, the embodiments disclosed herein are illustrative in all respects and can be modified as appropriate without departing from the spirit of the disclosure. [Explanation of symbols]

[0069] 1. Fire prevention unit 2 Sleeve Units 6 compartments 6H through hole 7 Long body 10 Fire-resistant sheet material 12 Sheet-shaped molded body 14 Film body 16. Non-combustible sheet 17 slits 20 Sleeve component 21 Metal thin plate 22 End 30 Filling material 32 End G Gap

Claims

1. A fire protection method for creating a fire-resistant structure in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, With the elongated body inserted through the through-hole, a wrapping step is performed in which a fire-resistant sheet member containing a heat-expandable fire-resistant material is wrapped around the portion of the elongated body that is on the outside of the partition; A covering step in which a sleeve member with a flammable filler arranged on its inner surface is placed over the portion of the elongated body around which the fire-resistant sheet member is wrapped; An insertion step of inserting the fire-resistant sheet member, the filler material, and the sleeve member into the through hole all at once along the outer surface of the elongated body, Fire prevention measures including those mentioned.

2. The fire prevention method according to claim 1, wherein in the covering step, the sleeve member is placed over the filler and the fire-resistant sheet member so that they are in contact.

3. The fire prevention method according to claim 2, wherein the insertion step is performed while the filler is compressed in the radial direction.

4. The fire prevention method according to any one of claims 1 to 3, wherein the sleeve member is formed by rolling a thin metal sheet, and by overlapping the ends, it becomes a cylindrical shape with an outer diameter less than or equal to the inner diameter of the through hole.

5. The fire prevention method according to any one of claims 1 to 3, wherein the coefficient of friction between the fire-resistant sheet member and the elongated body is smaller than the coefficient of friction between the fire-resistant sheet member and the filler.

6. The fire prevention method according to claim 5, wherein the fire-resistant sheet member comprises a sheet-like molded body mainly composed of a heat-expandable fire-resistant material and a film body laminated on the surface of the sheet-like molded body that is on the long body side.

7. A fire protection structure provided in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, A fire-resistant sheet member containing a heat-expandable fire-resistant material is wrapped around the long body inside the through-hole, A sleeve member inserted through the aforementioned through hole, A flammable filler is disposed on the inner surface of the sleeve member and in contact with the fire-resistant sheet member, A fire-resistant structure equipped with fire protection measures.

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