JP2022140952A - Fireproof sheet, fireproof member and fireproof structure - Google Patents

Abstract

To provide a fireproof sheet having high deformation capability and a thermal expansion member, etc. using the fireproof sheet.SOLUTION: A fireproof sheet 1 is primarily comprised of face materials 5, a thermal expansion member 3, etc. The fireproof sheet 1 is configured by forming the thermal expansion member 3 between a pair of face materials 5. The thermal expansion member 3 is, for example, a putty sheet-like, rubber sheet-like or mat-like member, or a sponge-like or porous member made of a powder-like material. Namely, the thermal expansion member 3 has flexibility. Accordingly, the fireproof sheet 1 including the face material 5 has the flexibility as a whole. One surface of the thermal expansion member 3 includes projections 7 and recesses 9 formed thereon. In other words, at least one surface of the thermal expansion member 3 is formed into a corrugated surface.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a fireproof sheet or the like for ensuring fireproof performance for penetrating parts such as pipes and cables into compartments, for example.

2. Description of the Related Art In a building or the like, pipes and cables (hereinafter sometimes simply referred to as long bodies) may be laid in each room partitioned by partitions. In this case, for example, if a fire breaks out in one of the rooms, the fire may spread throughout the building along the long body, causing serious damage.

For the long fireproof structure penetrating through such a partition, for example, a fireproof treatment material formed by housing a cushioning and noncombustible block body in an exterior member made of a thermal expansion member is used. (for example, Patent Document 1). The thermally expansive member is bag-shaped and is formed of rubber mixed with an expansive material through a vulcanization process.

JP 2008-245508 A

According to Patent Literature 1, the internal noncombustible material having cushioning properties can be deformed along the outer shape of the elongated body penetrating the partition. However, since the thermal expansion member, which also serves as the exterior of the blocks, is in the form of a rubber sheet, the blocks do not slide well against each other, resulting in poor workability when inserting the blocks into the through-holes.

On the other hand, there is a method of putting the thermal expansion member and the incombustible material into another bag. By doing so, the thermal expansion member is not exposed to the outside, so that the above-mentioned problems are eliminated and workability is excellent.

However, the thermal expansion member is usually putty-like or rubber-like, and has low deformability (flexibility) as compared with a noncombustible material having cushioning properties. Therefore, if the thermal expansion member is arranged around the noncombustible material, the cushioning properties of the noncombustible material can hardly function due to the stiffness of the thermal expansion member.

FIG. 14(a) is a conceptual diagram showing the fire prevention structure 100. FIG. In the fire prevention structure 100, elongated bodies 105 such as piping and wiring are arranged in a through hole 107 formed in a partition portion 103, and a plurality of block-shaped fire prevention members 101 are arranged between the inner surface of the through hole 107 and the elongated bodies 105. is placed. At this time, if the thermal expansion member is arranged so as to cover the surface of the incombustible material, the thermal expansion member hardly deforms. Therefore, a large gap is formed between the elongated body 105 and the fire prevention member 101 .

On the other hand, as shown in FIG. 14(b), a method of closing the gap by inserting a fire prevention member 109 made of a small-diameter stick-shaped thermal expansion member is proposed. However, since the thermal expansion member itself has low flexibility as described above, even if the fire prevention member 109 is inserted into the gap, the fire prevention member 109 cannot be sufficiently deformed like the fire prevention member 101 . For this reason, it also becomes a factor of forming a large gap.

On the other hand, there is a method of reducing the thickness of the thermal expansion member to make it easier to deform. However, in order to block the through-hole 107 in the event of a fire, a thermal expansion member of a predetermined amount or more is required, so simply reducing the thickness of the thermal expansion member may result in a shortage of the total amount of the thermal expansion member. be.

The present invention has been made in view of such problems, and an object of the present invention is to provide a fireproof sheet with high deformability and a thermal expansion member using the same.

In order to achieve the above object, a first invention is a fireproof sheet in which a thermal expansion member is arranged between a pair of face members, and irregularities are formed on at least one surface of the thermal expansion member. It is a fireproof sheet characterized by

At least a part of the concave portion of the thermal expansion member may be a through portion penetrating in the thickness direction.

The unevenness may be formed regularly.

The face material may be made of a cushioning material that is compressively deformable.

According to the first invention, since the thermal expansion member is sandwiched between the face members, the thermal expansion member is not exposed to the outside, and damage to the thermal expansion member during handling is suppressed. In addition, by forming irregularities on the surface of the thermal expansion member and varying the thickness, the sheet-like thermal expansion member can be easily deformed. Therefore, the fireproof sheet can be rolled up and used. In addition, by forming the fireproof member using the fireproof sheet and the noncombustible material, the fireproof member can be easily deformed, for example, along the outer shape of the elongated body. It is possible to suppress the generation of gaps.

In addition, flexibility can be further enhanced by using the concave portion as a penetrating portion and partially forming a portion without a thermal expansion member.

Further, by forming unevenness regularly, unevenness can be easily formed with a roller or the like. Also, the overall distribution of the thermal expansion member can be made substantially uniform.

Further, if at least one of the face members is composed of a compressible deformable cushioning material, the outer shape can be easily deformed when, for example, it is rolled into a roll and used as a stick.

A second invention is a fireproof member using the fireproof sheet according to the first invention, comprising a bag and an incombustible material housed in the bag and wrapped with the fireproof sheet, The incombustible material is a fireproof member characterized by being compressively deformable.

According to the second invention, the fireproof sheet arranged on the outer circumference of the incombustible material can be easily deformed, so that the cushioning properties of the incombustible material can be efficiently utilized.

A third aspect of the invention is a fire prevention structure according to the second aspect of the invention, comprising: a long body inserted through a through hole formed in the partition; and a gap between the through hole and the long body. It is a fire prevention structure characterized by comprising the said fire prevention member.

The fireproof sheet in which the irregularities of the thermal expansion member are formed in stripes is used, the direction in which the irregularities in the stripes extend is the direction of insertion into the through hole, and the parallel direction of the irregularities in the stripes is The fire prevention member may be arranged in a direction along the circumferential direction of the elongate body.

The fireproof sheet may be rolled up and inserted into the gap between the fireproof member and the elongated body.

Another fire prevention member including a thermal expansion member may be arranged on the outer circumference of the elongated body, and the fire prevention member may be arranged on the outer circumference of the another fire prevention member.

According to the third invention, since the fire prevention member is easily deformed, formation of a gap between the long body and the fire prevention member can be suppressed.

Further, when the thermal expansion members are arranged in stripes, the rigidity in the extending direction of the stripes is relatively high, and the deformation in the parallel direction of the stripes is easily possible. Therefore, by setting the extension direction of the stripes to be the direction of insertion into the through hole, the collapse of the fire prevention member is suppressed and insertion is facilitated. On the other hand, since the direction perpendicular to the insertion direction is easily deformed, it is possible to deform along the outer shape of the elongated body, thereby suppressing the formation of a gap with the elongated body.

In addition, by rolling up the fireproof sheet and inserting it into a slight gap, the fireproof sheet can be easily deformed along the shape of the gap, so that the gap between the fireproof member and the elongated body can be filled.

In addition, if the volume of the elongated body decreases significantly during combustion, another fire prevention member containing a thermal expansion material is placed around the outer periphery of the elongated body to reliably close the through-hole even in the event of a fire. can do.

ADVANTAGE OF THE INVENTION According to this invention, a fireproof sheet with high deformability, a thermal expansion member using the same, etc. can be provided.

2 is an exploded perspective view showing the fireproof sheet 1. FIG. (a) is sectional drawing of the fireproof sheet 1, (b) is sectional drawing of the other form of the fireproof sheet 1. FIG. 1 is an exploded perspective view of a fireproof member 10 using the fireproof sheet 1. FIG. (a) is a side sectional view showing the fire prevention structure 20, and (b) is a front view of the fire prevention structure 20. FIG. (a) is a cross-sectional view showing a fireproof sheet 1a, (b) is a cross-sectional view showing another configuration of the fireproof sheet 1a, and (c) is a diagram showing a rolled fireproof sheet 1a. (a) is a side sectional view showing a fire prevention structure 20a, and (b) is a front view of the fire prevention structure 20a. (a) is sectional drawing which shows the fireproof sheet 1b, (b) is sectional drawing which shows the fireproof sheet 1c. FIG. 10 is a view showing a fireproof sheet 1d, (a) is a sectional view taken along the line CC of (b), and (b) is a sectional view taken along the line BB of (a). FIG. 10 is a diagram showing a fireproof sheet 1e, (a) is a cross-sectional view along the EE line of (b), and (b) is a cross-sectional view along the DD line of (a). (a) is a plan view of the fireproof sheet 1f (perspective view of the face material), and (b) is a plan view of the fireproof sheet 1g (perspective view of the face material). FIG. 10 is a diagram showing a fireproof sheet 1h, (a) is a cross-sectional view along the GG line of (b), and (b) is a cross-sectional view along the FF line of (a). (a), (b) is a conceptual diagram which shows the manufacturing method of the fireproof sheet 1. FIG. (a), (b) is a conceptual diagram which shows the other manufacturing method of the fireproof sheet 1. FIG. (a) is a front view showing a conventional fire prevention structure 100, and (b) is a front view showing a conventional fire prevention structure 100a.

(First embodiment)
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is an exploded perspective view showing a fireproof sheet 1 according to the present invention. The fireproof sheet 1 is mainly composed of a face material 5, a thermal expansion member 3, and the like.

The fireproof sheet 1 is constructed by disposing a thermal expansion member 3 between a pair of face members 5 . The material of the face material 5 is not particularly limited, and for example, resin films such as polyethylene, polypropylene, polyethylene terephthalate, and nylon, non-woven fabric, and the like can be used. Further, the surface material 5 may be a glass cloth or an aluminum glass cloth obtained by attaching an aluminum foil to a glass cloth. The surface materials 5 on both sides covering the thermal expansion member 3 may be made of the same material or different materials.

The thermal expansion member 3 is composed of a thermal expansion member, a shape retention material, an inorganic filler, a base resin, and the like. A thermally expansive member expands when heated and increases its volume to cover areas that have been burned away by flames or heat of a fire. Examples include thermally expandable graphite, vermiculite, and thermally expandable microcapsules. Applicable. For example, one or more selected from the group consisting of polyphenylene ether, phosphate ester, red phosphorus, and ammonium polyphosphate can be applied as the shape-retaining material. As the inorganic filler, for example, one or more selected from the group consisting of aluminum hydroxide, magnesium hydroxide, talc, clay, calcium carbonate, inorganic balloon, aluminum oxide, magnesium oxide, and silica can be applied. . As the base resin, thermoplastic resin, butyl rubber, polybutadiene rubber, polyurethane, etc. can be applied. In addition, the material constituting the thermal expansion member 3 is not particularly limited.

The thermal expansion member 3 is, for example, a putty sheet-like, rubber sheet-like, mat-like member, or a sponge-like or porous member made of a powder-like material. That is, the thermal expansion member 3 has flexibility. Therefore, the fireproof sheet 1 including the face material 5 has flexibility as a whole.

A convex portion 7 and a concave portion 9 are formed on one surface of the thermal expansion member 3 . That is, at least one surface of the thermal expansion member 3 is formed in an uneven shape. In the illustrated example, the uneven shape is formed in a gentle wave shape in which the convex portions 7 and the concave portions 9 are regularly repeated. It should be noted that the size and repetition pitch of the unevenness are not limited to the illustrated examples. In the following description, the uneven shape is illustrated for easy understanding, but the uneven pitch and size are appropriately set.

FIG. 2(a) is a cross-sectional view of the fireproof sheet 1. FIG. As described above, in the fireproof sheet 1, one surface of the thermal expansion member 3 is uneven and the other surface is flat. That is, the thickness of the thermal expansion member 3 differs depending on the part. Moreover, it is desirable that the thickness of the concave portion 9 is 50% or less of the thickness of the thickest portion (the convex portion 7). If the difference in thickness between the convex portion 7 and the concave portion 9 is small, the effect is reduced.

In the example shown in FIG. 2( a ), the face material 5 is attached to the entire flat surface side of the thermal expansion member 3 , but the face material 5 is attached to the vicinity of the apexes of the convex portions 7 on the uneven surface side. can only be pasted. That is, a gap is formed between the face material 5 and the thermal expansion member 3 . On the other hand, as shown in FIG. 2(b), the face material 5 may be attached to the entire surface along the uneven surface. In either case, it is assumed that the surface material 5 is attached to both surfaces of the thermal expansion member 3 .

Next, a fireproof member using the fireproof sheet 1 will be described. FIG. 3 is an exploded perspective view of the fire prevention member 10. FIG. The fireproof member 10 is mainly composed of a fireproof sheet 1, a noncombustible material 11, a bag body 13, and the like.

The fireproof sheet 1 is wrapped around the outer circumference of the incombustible material 11 . At this time, the uneven surface side of the fireproof sheet 1 may be on the inside (noncombustible material 11 side), or the uneven surface side of the fireproof sheet 1 may be on the outside.

The fireproof sheet 1 is wrapped around the entire circumference of the incombustible material 11 in at least one direction. For example, when the incombustible material is a substantially rectangular parallelepiped, it should be wound around at least four surfaces except for two opposing surfaces without gaps. That is, in this case, the noncombustible material 11 is exposed on two opposing surfaces. The direction in which the incombustible material 11 is exposed (the direction perpendicular to the winding direction of the fireproof sheet 1 and the direction A in the figure) is the insertion direction into the through-hole described later. Here, the fireproof sheet 1 is formed in a predetermined length, and can be freely cut to a required length for use.

The noncombustible material 11 has a certain thickness with respect to the fireproof sheet 1, and can be largely compressed and deformed in the thickness direction. Inorganic fibers, such as alkali earth silicate fibers, ceramic fibers, rock wool, etc., can be applied as such a noncombustible material 11 .

The noncombustible material 11 around which the fireproof sheet 1 is wrapped is accommodated in the bag body 13 . Although the material of the bag body 13 is not limited, for example, polypropylene nonwoven fabric, polyethylene nonwoven fabric, or the like can be applied.

Next, a fire prevention structure using the fire prevention member 10 will be described. 4(a) is a side sectional view of the fire prevention structure 20, and FIG. 4(b) is a front view of the fire prevention structure 20. FIG. A through-hole 23 is formed in a partition 21 such as a wall or a floor, and an elongated body 25 such as a cable or pipe is inserted through the through-hole 23 . The shape of the through hole 23 and the diameter and number of the elongated bodies 25 are not limited to the illustrated example.

A plurality of block-shaped fire prevention members 10 are arranged inside the through holes 23 formed in the partition portion 21 on the outer periphery of the elongated body 25 . That is, a plurality of fire prevention members 10 are inserted into the gap between the inner surface of the through hole 23 and the outer surface of the long body 25 . In addition, as shown in FIG. 4(b), fireproof members 10 having different sizes can be used depending on the part. By combining fire prevention members 10 having different sizes in this way, it is possible to suppress the occurrence of gaps.

If the block-shaped fireproof member 10 alone cannot sufficiently close the gap, the fireproof sheet 1a may be used together. FIG. 5(a) is a cross-sectional view of the fireproof sheet 1a, FIG. 5(b) is a cross-sectional view showing another configuration of the fireproof sheet 1a, and FIG. 5(c) is a rolled fireproof sheet 1a. It is a figure which shows a state. The fireproof sheet 1a has substantially the same structure as the fireproof sheet 1, but differs in that a face material 5a is used as shown in FIGS. 5(a) and 5(b). In the example shown in FIG. 5(a), a face material 5a is used instead of the face material 5 of the fireproof sheet 1, and in the example shown in FIG. Material 5a is used. In addition, the face material 5a is not a film but is made of a cushioning material that can be compressed and deformed. For example, felt, non-woven fabric, napped fabric (for example, fleece fabric, fuzzy fabric, etc.), sponge, and the like can be applied.

In FIG. 5(a), instead of arranging the face material 5a on both sides of the thermal expansion member 3, one side may be the face material 5 on the film and only the other side may be the face material 5a. Moreover, in FIG.5(b), you may arrange|position the face material 5a only on one side. Further, the example shown in FIG. 5(a) and the example shown in FIG. 5(b) may be combined. That is, in the fireproof sheet 1a, a compressively deformable cushioning material may be arranged on at least one surface of the thermal expansion member 3. As shown in FIG.

As shown in FIG. 5(c), such a fireproof sheet 1a is rolled up and inserted between the fireproof member 10 and the elongated body 25 as shown in FIG. 4(b). By doing so, a finer gap can be closed.

Here, the fireproof sheet can be easily deformed in the direction perpendicular to the surface (for example, the vertical direction in FIGS. 2(a) and 5(a)) due to the concave-convex shape. For example, even if the volume of the thermal expansion member is the same, the thermal expansion member 3 can be easily bent by partially forming the concave portion, compared to the case where the thermal expansion member is formed into a sheet with a constant thickness. can. For this reason, along with compressive deformation of the internal noncombustible material 11, the deformability of the fireproof sheet as a whole increases. Therefore, as shown in FIG. 4(b), it is possible to easily follow the curved outer surface shape of the elongated body 25 or the like and adhere to it.

Even if the thickness of the entire thermal expansion member 3 is reduced, it is possible to improve the deformability. However, in order to close the through hole 23 in the event of a fire, a thermal expansion member of a predetermined amount or more is required, so it is difficult to ensure fire prevention performance simply by reducing the thickness of the thermal expansion member 3. .

On the other hand, if unevenness is formed in the thermal expansion member 3, since the amount of the thermal expansion member is small in the portion of the recess 9, there is a possibility that a portion with a small amount of thermal expansion is locally generated. However, if the through hole 23 can be completely closed even partially (for example, at the position of the convex portion 7) with respect to the axial direction of the through hole 23 during a fire, the fire prevention performance can be improved even if the partial concave portion 9 exists. can be ensured.

In addition, in order to further increase the amount of the thermal expansion member, another fire prevention member may be arranged on the outer periphery of the elongated body 25 . FIG. 6(a) is a side sectional view of the fire prevention structure 20a, and FIG. 6(b) is a front view of the fire prevention structure 20a.

The fire prevention structure 20 a has substantially the same structure as the fire prevention structure 20 , but another fire prevention member 10 a including a thermal expansion member is arranged on the outer peripheral portion of the elongated body 15 . The fireproof member 10a is, for example, a thick putty sheet containing a thermal expansion member. In this case, the fireproof member 10 and the fireproof sheet 1a are arranged on the outer periphery of the fireproof member 10a. A fireproof sheet 1a may be wrapped around the outer periphery of the elongated body 25 instead of the fireproof member 10a.

By arranging the fireproof member 10a and the fireproof sheet 1a around the outer circumference of the elongated body 25 in this way, even if the fireproof member 10 alone cannot compensate for the decrease in volume of the elongated body 25 during combustion, the thermal expansion member You can increase the amount. Therefore, the through hole can be closed more reliably in case of fire. Even in this case, since the fireproof member 10 has a high deformability, the fireproof member 10 can easily follow the curved outer surface shape of the long body 25 or the like around which the fireproof member 10a or the fireproof sheet 1a is wound. can adhere to each other.

In this way, the through hole 23 around the elongated body 25 is closed by the fire prevention member 10 . Therefore, the spaces on both sides of the partition 21 are blinded. Also, if a fire or the like breaks out in one of the spaces and the elongated body 25 is destroyed by fire, the thermal expansion member 3 of the fire prevention member 10 expands to block the space formed by the elongated body 25 being destroyed by fire. can be done.

Further, as described above, when the fireproof sheet 1 is wrapped around the noncombustible material 11, the direction perpendicular to the winding direction (direction A in FIG. 3) is the insertion direction of the fireproof member 10 into the through hole 23. By doing so, the direction perpendicular to the easily deformable direction of the fireproof sheet 1 (the direction perpendicular to each wound surface) becomes the direction of insertion.

Similarly, when the fireproof sheet 1a is rolled, the direction perpendicular to the axial direction (direction H in FIG. 5(c)) is the insertion direction of the fireproof member 10 into the through hole 23. As shown in FIG. By doing so, the direction perpendicular to the easily deformable direction of the fireproof sheet 1a (the direction perpendicular to each wound surface) becomes the direction of insertion. In particular, since the fireproof sheet 1a is rolled, it is difficult to deform in the axial direction. In this way, by setting the direction in which deformation is unlikely to occur as the insertion direction, it is possible to suppress deformation such as buckling of the fireproof sheet due to resistance during insertion. Therefore, the fireproof sheet or the like can be easily inserted even in a portion where the gap is narrow.

As described above, according to the fireproof sheet 1 according to the first embodiment, by forming the uneven shape on the thermal expansion member 3, it is possible to enhance the deformability in the planar direction. Therefore, it can be rolled up for use, and can be easily wound around the outer circumference of the noncombustible material 11 . In addition, when it comes into contact with the elongated body 25, it can be easily deformed along the outer shape of the elongated body 25, so it is possible to suppress the formation of a gap between the elongated body 25 and the like.

In addition, since the thermal expansion member is partially formed with a thin portion, it is possible to reduce the amount of thermal expansion material used. Therefore, compared with a fireproof sheet having the same thickness, it is possible to achieve a reduction in weight and cost.

In addition, since the fireproof sheet 1 is rolled into a cylindrical shape around the outer periphery of the noncombustible material 11, or the fireproof sheet 1a itself is rolled and used, by setting this axial direction as the insertion direction, it is possible to deformation of fireproof members and fireproof sheets can be suppressed.

In addition, by wrapping the fireproof sheet 1 around the entire circumference of the noncombustible material 11, the thermal expansion member 3 is arranged around the entire circumference of the surface facing the inner surface of the through hole 23, so that the through hole 23 can be efficiently closed in the event of fire. be able to. In addition, by arranging the direction in which the noncombustible material 11 is not covered with the fireproof sheet 1 (the direction in which the noncombustible material 11 is exposed) toward the opening direction of the through hole 23, a portion unnecessary for blocking the through hole 23 is arranged. Since the thermal expansion member 3 is not arranged in the , the usage amount of the thermal expansion member 3 can be reduced.

(Second embodiment)
Next, a second embodiment will be described. Fig.7 (a) is a figure which shows the fireproof sheet 1b which concerns on 2nd Embodiment. In addition, in the following description, the same reference numerals are given to the configurations having the same effects as those of the first embodiment, and overlapping descriptions are omitted.

The fireproof sheet 1b has substantially the same structure as the fireproof sheet 1 and the like, but differs in that uneven shapes are formed on both sides of the thermal expansion member 3 . In this manner, the thermal expansion member 3 may have unevenness on one side or both sides to change the thickness.

Moreover, when forming the concave-convex shape on both surfaces, the thickness may be substantially constant and the corrugated shape may be used instead of varying the thickness as in the case of the fireproof sheet 1c shown in FIG. 7(b). Even with such a corrugated shape, the deformability of the fireproof sheet 1c can be enhanced. In this case, it is desirable that the height difference between the concave portion 9 and the convex portion 7 is 50% or less of the thickness (for example, the thickness of the concave portion 9 or the convex portion 7). If the wave heights of the protrusions 7 and the recesses 9 are too small, the effect on deformation is reduced.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. Further, by forming uneven shapes on both sides, for example, a wave shape can be formed.

(Third Embodiment)
Next, a third embodiment will be described. 8A and 8B are diagrams showing the fireproof sheet 1d, and FIG. 8A is a cross-sectional view taken along the line CC of FIG. , and FIG. 8(b) is a cross-sectional view taken along line BB of FIG. 8(a).

In this embodiment, the thermal expansion member 3 is formed in a lattice shape. That is, the recessed portion 9 of the thermal expansion member 3 becomes a penetrating portion penetrating in the thickness direction. As described above, the uneven shape of the thermal expansion member 3 includes the case where at least a part of the concave portion 9 penetrates and the minimum thickness is 0 mm. Even in this case, if the amount of the thermal expansion member in the convex portion 7 is sufficient, the gap between the through hole and the elongated body can be closed at least partially in the longitudinal direction in case of fire.

Here, when the thickness of the thinnest portion (concave portion 9) is 0 mm (that is, when it partially penetrates), the thickness of the thickest portion (convex portion 7) is the thickness of the thermally expandable particle. should be at least one layer. For example, the thickness of the thickest portion (projection 7) is desirably 0.04 mm or more. If the thickness of the convex portion 7 is too thin, the amount of the thermal expansion member will decrease, and the ability to close the through hole will decrease.

Note that the form of having the through portion is not limited to the case where the thermal expansion member 3 has a lattice shape. For example, in the illustrated example, the planar shape of the recesses 9 (penetrating portions) is substantially rectangular and aligned, but the planar shape of the recesses 9 may be other shapes such as a round shape, a staggered arrangement, or a different shape. Mixed sizes and shapes may be used.

According to the third embodiment, effects similar to those of the first embodiment can be obtained. Moreover, a part of the recessed part of uneven|corrugated shape may penetrate.

(Fourth embodiment)
Next, a fourth embodiment will be described. 9A and 9B are views showing a fireproof sheet 1e, and FIG. 9A is a cross-sectional view taken along line EE in FIG. , and FIG. 9(b) is a sectional view taken along line DD of FIG. 9(a).

In this embodiment, the thermal expansion members 3 are formed in dots. That is, the convex portion 7 of the thermal expansion member 3 is not continuous and is divided into a plurality of portions, and the concave portion 9 serves as a penetrating portion penetrating in the thickness direction. Accordingly, the recesses 9 of the thermal expansion member 3 are formed in a grid pattern. As described above, the uneven shape of the thermal expansion member 3 includes the case where the protrusions 7 are not connected as a whole but are arranged dispersedly. Even in this case, if the amount of the thermal expansion member in the convex portion 7 is sufficient, the gap between the through hole and the elongated body can be closed at least partially in the longitudinal direction in case of fire.

In the illustrated example, the planar shape of the protrusions 7 is substantially circular and aligned, but the planar shape of the protrusions 7 may be rectangular or other shapes, such as a zigzag arrangement or different sizes and shapes. may be mixed and arranged.

According to the fourth embodiment, effects similar to those of the first embodiment can be obtained. Moreover, at least a part of the convex portions of the concave-convex shape may be arranged separately.

(Fifth embodiment)
Next, a fifth embodiment will be described. FIG. 10(a) is a plan view of the fireproof sheet 1f in which the face material 5 on the upper surface is seen through. The uneven shape of the thermal expansion member 3 is formed in stripes on the fireproof sheet 1f. That is, the convex portion 7 and the concave portion 9 are continuous in one direction (vertical direction in the drawing). The direction in which the protrusions 7 and the recesses 9 continue (vertical direction in the figure) is the extending direction of the stripe-shaped unevenness, and the direction in which the protrusions 7 and the recesses 9 are alternately repeated (horizontal direction in the figure) is the stripe. It is the direction in which the unevenness of the shape is juxtaposed.

In addition, like the fireproof sheet 1g shown in FIG. It may be When the protrusions 7 are formed in stripes in this manner, the thermal expansion member 3 is different in easiness of deformation depending on the direction in which the stripe-shaped unevenness is extended and the direction in which the stripe-shaped unevenness is arranged. For example, as shown in FIG. 5(c), when the fireproof sheet is used in a rolled form, it can be easily rolled in the side-by-side direction of the uneven shape. It is difficult to roll due to its low deformability.

Similarly, in the fireproof member 10 , by setting the winding direction around the noncombustible material 11 to the parallel direction of the stripe-shaped unevenness, the fireproof sheet can be easily wound around the outer circumference of the noncombustible material 11 . At this time, by making the direction perpendicular to the winding direction (direction A in FIG. 3) the extending direction of the stripe-shaped unevenness, deformation in this direction can be suppressed.

When such a fireproof sheet or fireproof member is used, the direction perpendicular to the winding direction of the fireproof sheet (direction A in FIG. 3) or the axial direction when the fireproof sheet is rolled (direction H in FIG. 5C) ) is difficult to deform. Therefore, if this direction is set as the direction of insertion into the through-hole, deformation of the fireproof member or the fireproof sheet during insertion is suppressed, so insertion is easy. Also in this case, since the fireproof member and the fireproof sheet are easily deformed by the force from the side, they can be easily deformed along the outer shape of the adjoining elongated body or the like. That is, the fireproof member or the fireproof sheet is arranged so that the extending direction of the stripe-shaped unevenness is the direction of insertion into the through-hole, and the side-by-side direction of the stripe-shaped unevenness is along the circumferential direction of the elongated body. Therefore, it is possible to achieve both insertability and shape followability.

In the fireproof sheets 1f and 1g, the concave portion 9 is a penetrating portion without a thermal expansion member in order to provide directionality to the easiness of deformation, but it is not limited to this. For example, the cross-sectional shapes (hatched shapes) shown in FIGS. 2(a), 2(b), 7(a), and 7(b) may extend in the depth direction of the drawing. Even in this case, the convex portions 7 and the concave portions 9 are continuous in the extending direction, and the convex portions 7 and the concave portions 9 are alternately repeated in the side-by-side direction.

According to the fifth embodiment, effects similar to those of the first embodiment can be obtained. Further, by forming the unevenness in a striped shape, the extending direction of the stripe-shaped unevenness is the direction of insertion into the through-hole, and the parallel direction of the stripe-shaped unevenness is the direction along the circumferential direction of the elongated body. By arranging the fireproof member or the fireproof sheet, it is possible to achieve both insertability and shape followability.

(Sixth embodiment)
Next, a sixth embodiment will be described. 11A and 11B are views showing a fireproof sheet 1h, and FIG. 11A is a cross-sectional view along the line GG in FIG. , and FIG. 11(b) is a sectional view taken along line FF of FIG. 11(a).

The fireproof sheet 1h is formed with the protrusions 7 and the recesses 9 in a mottled pattern. That is, the thickness varies randomly, rather than the protrusions 7 and the recesses 9 being clearly arranged regularly. In this case, the penetrating portion is defined as the concave portion 9, and the portion other than the penetrating portion where the thermal expansion member exists is the convex portion 7.

Thus, the uneven shape of the thermal expansion member 3 is not limited to being formed regularly, and may be formed irregularly. Although the height of the projections 7 is irregular, the maximum thickness of the projections 7 may be, for example, at least one layer of thermally expandable particles, and may be approximately 0.04 mm or more.

According to the sixth embodiment, effects similar to those of the first embodiment can be obtained. Moreover, the uneven shape of the thermal expansion member 3 may be irregular, and the height of the protrusions 7 may not be constant.

(Manufacturing method of fireproof sheet)
Next, a method for manufacturing the fireproof sheet will be described. In general, as a method of forming a thermally expansible member in a sheet form, a method of forming a putty sheet by kneading a thermally expansive material (thermally expandable graphite, etc.) with a binder made of butyl rubber, polybutadiene oil, etc., There is a method of curing a base resin such as polyurethane to form a sheet like a rubber sheet. According to these methods, when processing the thermally expansible member into a sheet, it is possible to form a regular uneven shape on the surface with a roller or the like. A fireproof sheet can be produced by sandwiching the obtained sheet-like thermally expandable member between face materials.

On the other hand, a method of manufacturing a fireproof sheet using powder may be employed. FIG. 12(a) and FIG. 12(b) are conceptual diagrams showing a method for manufacturing a fireproof sheet. A face member 5 is arranged, and a guide 31 having an opening at a position corresponding to the convex portion 7 is arranged thereon. In this state, the thermal expansion material powder 33 is sprinkled from above. The thermally expansible material powder 33 is a mixture of a thermally expansive material and a thermoplastic resin or the like.

The thermal expansion material powder 33 is deposited below the opening of the guide 31 . For example, if the shape of the opening of the guide 31 is dot-shaped, the thermal expansion material powder 33 can be deposited on the face member 5 in a dot-shaped manner. After depositing a predetermined amount of thermally expansible material powder 33 on a predetermined position, the surface material 5 is covered from the upper surface and heated to be heat-sealed. As described above, a fireproof sheet having a desired shape can be formed. After the thermally expansive material powder 33 is heat-sealed, the thickness may be adjusted as appropriate.

Alternatively, as shown in FIGS. 13A and 13B, the thermal expansion material powder 33 may be dispersed on the face member 5 using a mesh 35 having a predetermined gap. If the openings of the mesh 35 are not uniform, the thermal expansion material powder 33 can be randomly deposited. That is, by making the deposition amount of the thermal expansion material powder 33 non-uniform, the protrusions 7 can be formed in a mottled pattern.

According to such a manufacturing method, since a wide face material 5 can be used, lamination of the face material 5 and cutting to a predetermined width are easy.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is obvious that a person skilled in the art can conceive various modifications or modifications within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. be understood to belong to

For example, it goes without saying that the configurations in each embodiment can be combined with each other.

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h...Fireproof sheet 3...Thermal expansion members 5, 5a...Face material 7...Convex part 9...Concave part 10, 10a Fireproof member 11 Noncombustible material 13 Bag bodies 20, 20a Fireproof structure 21 Division part 23 Through hole 25 Elongated body 31 Guide 33 Thermal expansion material powder 35 Meshes 100, 100a Fireproof structures 101, 109 Fireproof members 103 Partitions 105 Elongated body 107 Through holes

In order to achieve the object described above, a first invention is a fire prevention device characterized in that a thermal expansion member is arranged between a pair of face members, and unevenness is formed on at least one surface of the thermal expansion member. A fireproof member using a sheet, comprising a bag and a noncombustible material housed in the bag and wrapped with the fireproof sheet, wherein the noncombustible material is compressively deformable. It is a fireproof member that

According to the first invention, since the thermal expansion member is sandwiched between the face members, the thermal expansion member is not exposed to the outside, and damage to the thermal expansion member during handling is suppressed. In addition, by forming irregularities on the surface of the thermal expansion member and varying the thickness, the sheet-like thermal expansion member can be easily deformed. Therefore, the fireproof sheet can be rolled up and used. In addition, by forming the fireproof member using the fireproof sheet and the noncombustible material, the fireproof member can be easily deformed, for example, along the outer shape of the elongated body. It is possible to suppress the generation of gaps. Furthermore, since the fireproof sheet arranged on the outer periphery of the incombustible material can be easily deformed, the cushioning properties of the incombustible material can be efficiently utilized.

A second aspect of the invention is a fire prevention structure according to the first aspect of the invention, comprising: a long body inserted through a through hole formed in a partition; and a gap between the through hole and the long body. It is a fire prevention structure characterized by comprising the said fire prevention member.

In addition, if the volume of the elongated body decreases significantly during combustion, another fire prevention member containing a thermal expansion material is placed around the outer periphery of the elongated body to reliably close the through-hole even in the event of a fire. can do.
A third aspect of the present invention is a fireproof sheet in which a thermal expansion member is arranged between a pair of face members, and unevenness is formed on at least one surface of the thermal expansion member, and the unevenness of the thermal expansion member is The unevenness of the thermal expansion member is formed in a grid shape, or the unevenness of the thermal expansion member is formed in a dot shape, or the unevenness of the thermal expansion member is formed in a stripe shape, and the protrusions of the unevenness on the stripe are formed on the fireproof sheet. It is not completely continuous with respect to the stretching direction, and part of the stretching direction is partially interrupted to include recesses, or the protrusions and recesses of the thermal expansion member are formed in a mottled pattern. It is a fireproof sheet that

Claims (9)

A fireproof sheet in which a thermal expansion member is arranged between a pair of face materials,
A fireproof sheet, wherein unevenness is formed on at least one surface of the thermal expansion member. 2. The fireproof sheet according to claim 1, wherein at least a part of the concave portion of said thermal expansion member is a penetrating portion penetrating in the thickness direction. 3. The fireproof sheet according to claim 1, wherein the irregularities are formed regularly. 4. The fireproof sheet according to any one of claims 1 to 3, wherein at least one of said face members is composed of a compressible and deformable cushioning material. A fireproof member using the fireproof sheet according to any one of claims 1 to 4,
a bag;
a noncombustible material housed in the bag and wrapped with the fireproof sheet;
and wherein the incombustible material is compressively deformable. A fire prevention structure using the fire prevention member according to claim 5,
a long body inserted through a through-hole formed in the partition;
the fire prevention member inserted into the gap between the inner surface of the through hole and the elongated body;
A fire protection structure comprising: The fireproof sheet in which the unevenness of the thermal expansion member is formed in stripes is used,
The fire prevention member is arranged such that the extending direction of the stripe-shaped unevenness is the insertion direction into the through hole, and the side-by-side direction of the stripe-shaped unevenness is along the circumferential direction of the elongated body. The fire protection structure according to claim 6, characterized in that: 8. The fireproof structure according to claim 6, wherein the fireproof sheet is rolled up and inserted into the gap between the fireproof member and the elongated body. Another fire prevention member containing a thermal expansion material is arranged on the outer circumference of the elongated body, and the fire prevention member is arranged on the outer circumference of the another fire prevention member. Item 9. The fire protection structure according to any one of items 8.

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