JP2021101080A - Fireproof member, and fireproof structure - Google Patents

Abstract

To provide a fireproof member and the like capable of obtaining a fireproof structure with excellent workability and stable quality.SOLUTION: A fireproof member 1 is mainly constituted of a first foaming body 3, a thermal expansion member 7, a second foaming body 9, a coating body 11 and the like. The first foaming body 3 is a member capable of elastically deforming, and is preferably a combustible sponge such as a urethane foam. On the first foaming body 3, the thermal expansion member 7 expanding by heat in a fire and the like is laminated. On the thermal expansion member 7, the second foaming body 9 capable of elastically deforming is laminated. The second foaming body 9 is made of a flexible member capable of deforming in a thickness direction. In the second foaming body 9, a thermal expansion material spreading in a base resin is included. The first foaming body 3, the thermal expansion member 7, and the second foaming body 9 are integrally coated with the coating body 11. Here, in a cross section perpendicular to a longer direction of the fireproof member 1, the sheet-like second foaming body 9 is laminated on the thermal expansion member 7 in a folded state.SELECTED DRAWING: Figure 1

Description

The present invention relates to, for example, a fireproof member for ensuring fireproof performance for a penetrating portion such as a pipe or a cable to a compartment.

In a building or the like, pipes and cables (hereinafter, simply referred to as a long body) may be laid in each room divided by a section. In this case, for example, if a fire breaks out in one of the rooms, the fire spreads over the entire building along the long body, which may cause enormous damage.

In a fireproof structure of a long body penetrating such a section, it is necessary to fill the gap between the long body and the through hole. However, the outer diameter of the long body inserted into the compartment is not constant, and the gap between the through hole and the long body is not constant depending on the type of the long body.

In order to apply to such long bodies having different outer diameters, there is a method of arranging an elastically deformable foam on the outer circumference of the long body (for example, Patent Document 1). Further, there is a method in which a plurality of fold pieces are provided on the inner peripheral surface of the fireproof member arranged on the outer periphery of the long body, and the fold pieces are brought into close contact with the outer peripheral surface of the long body (for example, Patent Document 2).

Further, there is a method of using a string-shaped refractory member and winding the string-shaped refractory member around the outer circumference of a long body a plurality of times to fill a gap (Patent Document 3). In this case, it can be applied to different gaps by changing the number of times the string-shaped refractory member is wound according to the gap between the long body and the inner surface of the through hole.

JP-A-2018-105039 JP-A-2017-128960 Japanese Unexamined Patent Publication No. 2001-187769

Usually, in a method such as Patent Document 1 or Patent Document 2, first, with respect to a long body previously inserted into the through hole, a fireproof member is arranged on the outer periphery of the long body outside the through hole. Next, by moving the fireproof member inside the through hole along the long body, the fireproof member is arranged in the gap between the through hole and the long body to form a fireproof structure.

However, in order to make it applicable to a plurality of types of long bodies, the foam and fold pieces arranged around the long body need to be easily deformed with respect to the outer shape of the long body. Therefore, the foam and the fold pieces are composed of flexible members. Therefore, when the refractory member is arranged on the outer periphery of the long body and slid into the through hole, the foam or fold pieces may be damaged. However, if the rigidity of the refractory member that comes into contact with the long body is increased, the followability to the outer shape of the long body is lowered, and the gap between the through hole and the long body cannot be sufficiently filled.

On the other hand, in Patent Document 3, it is possible to fill the gap between the through hole and the long body by changing the number of times the string-shaped member is wound according to the gap between the long body and the long body. However, if the gap becomes large, the number of windings increases and the workability is poor. In particular, when working in a narrow space, it is not easy to handle a long string-shaped member and wind it around the outer circumference of a long body many times. In addition, since it is necessary to adjust the number of windings on site, the construction quality tends to vary depending on the operator.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a refractory member or the like which is excellent in workability and can obtain a refractory structure of stable quality.

In order to achieve the above-mentioned object, the first invention is a fireproof member used by being wrapped around a long body, and the first foam is elastically deformable and flammable, and the first foam is used. It includes a heat-expanding member to be laminated, a second foam laminated on the heat-expanding member and elastically deformable, and a covering body covering the first foam, the heat-expanding member, and the second foam. However, the second foam is a fireproof member characterized by being made of a foam containing a thermal expansion material.

It is desirable that the sheet-shaped member of the second foam is folded and laminated on the thermal expansion member.

The second foam is folded so that the other end protrudes from one end, and the other end of the second foam is the end of the sheet-like covering. The portions may be sandwiched and integrated.

In a cross section parallel to the longitudinal direction of the first foam, at least one end of the first foam protrudes from the end of the thermal expansion member, and the first foam in the protrusion protrudes from the end. It may have a tapered portion that becomes thinner as it goes.

According to the first invention, since the first foam and the second foam that are flexible and elastically deformable are used, it is possible to easily follow the shape of the elongated body and fill the gap with the through hole. In particular, a second foam that can be elastically deformed is provided on the inner surface side (outer peripheral side) of the through hole with respect to the thermal expansion member. Therefore, it functions as a cushion capable of following the unevenness of the inner surface of the through hole.

Further, since the second foam contains a thermal expansion material, the second foam can also be expanded in the event of a fire. Therefore, the expansion of the thermal expansion member in the outer peripheral direction can be suppressed, and the thermal expansion member can be expanded in the central direction of the through hole. Therefore, the through hole can be closed more reliably. Further, since all the foams and the like are covered with the covering body, the foams are not exposed on the contact surface with the long body, and the foams and the long body do not come into direct contact with each other. Therefore, damage to the foam or the like during construction can be suppressed.

Further, if the sheet-shaped second foam is folded and laminated on the thermal expansion member, the thickness is increased by folding and a space is formed between the folded second foams, thereby further increasing the thickness. High cushioning properties can be obtained.

Further, when the second foam is folded, the end is shifted and folded so that the other end protrudes from one end, so that the second foam is sealed with the covering. The protruding part can be sandwiched and integrated. Therefore, it is possible to prevent the second foam from shifting with respect to the covering body.

Further, by projecting at least one end of the first foam from the thermal expansion member and providing a tapered portion so that the thickness becomes thinner so as to project from the thermal expansion member side, the refractory member is formed on the outer periphery of the long body. When wrapped around, the step in the wrap portion between the refractory members can be smoothed.

In the second invention, the fire-resistant member according to the first invention is used, a long body is inserted into a through hole formed in a compartment, and the fire-resistant member is made of the long body inside the through hole. It is a fireproof structure characterized in that the gap between the long body and the inner surface of the through hole is closed by the fireproof member by being wound around the long body.

According to the second invention, the first foam and the second foam can surely fill the gap between the elongated body and the inner surface of the through hole, and the covering suppresses damage to the foam. It is possible. Therefore, a fireproof structure with stable construction quality can be obtained.

According to the present invention, it is possible to provide a refractory member or the like which is excellent in workability and can obtain a refractory structure of stable quality.

An exploded perspective view showing the refractory member 1. (A) is a perspective view of the refractory member 1, and (b) is a sectional view taken along line AA of (a). The figure which shows the process of constructing a fireproof structure. The figure which shows the process of constructing a fireproof structure. FIG. 5 is a cross-sectional view of a long body 13 showing a refractory member 1 wound around the outer circumference. The figure which shows the fireproof structure 20 The exploded perspective view which shows the refractory member 1a. (A) is a perspective view of the refractory member 1a, and (b) is a sectional view taken along line BB of (a). (A) is a perspective view of the refractory member 1b, and (b) is a sectional view taken along line DD of (a). FIG. 5 is a cross-sectional view of a long body 13 showing a fireproof member 1b wrapped around the outer circumference. (A) and (b) are diagrams showing other sealing methods of the covering body 11.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is an exploded perspective view showing the refractory member 1 according to the present invention. The refractory member 1 is mainly composed of a first foam 3, a thermal expansion member 7, a second foam 9, a covering 11, and the like.

The first foam 3 is an elastically deformable member, and is preferably a flammable sponge such as a urethane foam. That is, the first foam 3 is made of a flexible member that can be easily deformed in the thickness direction. Further, it is desirable that the first foam 3 is, for example, a corrugated foam. That is, on one surface of the first foam 3, corrugated peaks and valleys are regularly arranged in the width direction and the longitudinal direction perpendicular to the width direction.

A thermal expansion member 7 that expands due to heat in the event of a fire or the like is laminated on the first foam 3. Thermal expansion member 7 For example, a sheet-shaped member or a putty-shaped member is desirable. Further, a second foam 9 that can be elastically deformed is laminated on the thermal expansion member 7. The second foam 9 is made of a flexible member that can be deformed in the thickness direction. For example, the first foam 3 has higher flexibility than the second foam 9. That is, under the same thickness and the same load, the amount of elastic deformation of the second foam 9 is smaller than that of the first foam 3.

A polyolefin-based resin is used as the base resin of the second foam 9, and the second foam 9 is foamed by a foaming agent. As the base resin, for example, one type of polyolefin resin may be contained, or two or more types may be contained. As the polyolefin-based resin, an ethylene-vinyl acetate copolymer having high flexibility and / or low-density polyethylene is particularly preferable.

The second foam 9 contains a thermal expansion material dispersed in the base resin. That is, the second foam 9 is a foam containing a thermal expansion material. As the thermal expansion material, for example, powdery expansive graphite or the like is used. Further, the second foam may contain a cross-linking agent or a glass frit for preventing the expanded thermal expansion material from losing its shape after combustion of the base resin. The glass frit functions as a sintering agent and is sintered by heat or flame to prevent it from losing its shape. As the glass frit, phosphoric acid-based low-melting glass, boric acid-based low-melting glass, sodium oxide-based low-melting glass, or the like can be used.

As described above, the second foam 9 is a flexible foam, and even if the base resin is burned by heat, it does not completely disappear due to the expansion of the thermal expansion material. Further, after the base resin is burned, the expanded thermal expansion material can maintain its shape without losing its shape due to the glass frit.

The first foam 3, the thermal expansion member 7, and the second foam 9 may be directly laminated to each other, but other members are arranged between the members and laminated via the other members. May be done. Further, the laminated portions of the members and the folded second foams 9 may be adhered to each other with, for example, an adhesive or double-sided tape.

The first foam 3, the thermal expansion member 7, and the second foam 9 are collectively covered with the covering 11. The covering body 11 is made of a flexible member that does not hinder the deformation of the first foam 3 and the second foam 9 in the thickness direction and can be followed, and is made of, for example, a non-woven fabric. At this time, the first foam 3 is arranged so that the uneven shape formed by the peaks and valleys is on the outside (the side opposite to the thermal expansion member 7 and in contact with the covering 11). ..

FIG. 2A is a perspective view of the refractory member 1 covered with the covering body 11, and FIG. 2B is a cross-sectional view taken along the line AA of FIG. 2A. The first foam 3, the thermal expansion member 7, and the second foam 9 are covered with a sheet-shaped covering 11, and the periphery thereof is sealed by a sealing portion 5 by heat fusion or the like. For example, the covering body 11 is formed into a tubular shape by overlapping and sealing the ends of the sheet-shaped members, and the ends of the openings at both ends are overlapped and sealed.

Here, as shown in FIG. 2A, in the present embodiment, in the cross section perpendicular to the longitudinal direction of the refractory member 1, the sheet-shaped second foam 9 is folded into the thermal expansion member 7. Stacked. That is, the folded portion of the second foam 9 is formed along the longitudinal direction of the refractory member 1.

As described above, the second foam 9 is flexible and elastically deformable, but the flexibility is lower than that of the first foam 3. On the other hand, by folding and laminating the sheet-shaped second foam 9, it is possible to increase the thickness and secure a higher amount of elastic deformation due to the gap between the folded sheets and the like. Therefore, it is possible to more reliably fill the gap between the through hole described later.

Next, a method of constructing a fireproof structure using the fireproof member 1 will be described. 3 to 6 are views showing a construction process of a fireproof structure. First, as shown in FIG. 3, a through hole 17 is formed in a compartment 19 which is a fire protection compartment. The partition portion 19 is a wall that partitions the internal space of a structure such as a building. Next, the long body 13 is inserted into the through hole 17 formed in the compartment 19. The long body 13 is, for example, a cable or a pipe. A plurality of long bodies may be inserted.

Next, as shown in FIG. 4, the refractory member 1 is attached to the elongated body 13. FIG. 5 is a cross-sectional view of a state in which the refractory member 1 is wound around the long body 13. In FIG. 5, for the sake of simplicity, the uneven shape of the first foam 3 and the folded form of the second foam 9 are not shown. As shown in FIGS. 4 and 5, the refractory member 1 is used by being wound around a long body 13. At this time, the first foam 3 is arranged on the innermost side of the refractory member 1 and on the side in contact with the elongated body 13, and the second foam 9 is arranged on the outermost side.

When the refractory member 1 is wound around the long body 13, both ends of the refractory member 1 overlap each other to form a wrap portion (overlapping portion). By doing so, no gap is formed between the refractory members 1, and the entire circumference of the long body 13 can be covered with the refractory member 1.

Here, the first foam 3 arranged inside the thermal expansion member 7 is composed of a flammable member. Normally, in the event of a fire, the temperature rises from the long body 13 side (inside the refractory member 1), and the first foam 3 arranged on the inner peripheral side of the refractory member 1 burns immediately. Therefore, the thermal expansion member 7 is heated in a short time, and the expansion can be started immediately. At this time, since the first foam 3 inside the thermal expansion member 7 is burnt down, it does not hinder the expansion of the thermal expansion member 7 in the direction of the elongated body 13.

On the other hand, the second foam 9 is arranged on the outer peripheral side of the thermal expansion member 7. The amount of thermal expansion of the second foam 9 is smaller than that of the thermal expansion member 7, but even if the base resin burns, the expansion of the expansion material dispersed inside causes the space between the thermal expansion member 7 and the inner surface of the through hole. Can be reliably closed. Therefore, the thermal expansion member 7 can be preferentially expanded inward. That is, the expansion direction of the thermal expansion member 7 can be controlled.

Next, as shown in FIG. 6, the refractory member 1 in a rolled state is slid and moved along the elongated body 13 and pushed into the through hole 17. The thickness of the refractory member 1 is thicker than the gap between the through hole 17 and the elongated body 13, but it can be inserted into the through hole 17 when the first foam 3 and the second foam 9 are crushed and deformed. ..

The refractory member 1 inserted into the through hole 17 can fill and close the gap between the long body 13 and the through hole 17 by elastic restoration of the first foam 3 and the second foam 9. More specifically, the first foam 3 deforms following the outer shape of the long body 13 and adheres to the outer peripheral surface of the long body 13 via the covering body 11. Further, the second foam 9 is deformed following the shape of the inner surface of the through hole 17, and is brought into close contact with the inner peripheral surface of the through hole 17 via the covering body 11.

As described above, an uneven shape is formed on the inner surface side of the first foam 3. The uneven mountain portion comes into contact with the elongated body 13 and is easily crushed. Therefore, even if the outer diameter or the number of the long bodies 13 changes, the same refractory member 1 can be used.

As described above, inside the through hole 17, the fireproof member 1 is wound around the long body 13, and the gap between the long body 13 and the inner surface of the through hole 17 is closed by the fireproof member 1. Can be constructed.

As described above, according to the fireproof member 1 according to the present embodiment, the first foam 3 is arranged in the innermost layer, and the first foam 3 can be easily formed according to the outer diameter of the elongated body 13. Since it is crushed, it can be applied to a long body 13 having a plurality of diameters by one fireproof member 1, and the fireproof member 1 can be surely brought into close contact with the outer periphery of the long body 13. Further, since the long body 13 and the first foam 3 do not come into direct contact with each other, it is possible to prevent the first foam 3 from being damaged when the fireproof member 1 is moved along the long body 13. it can.

Further, by using a flammable member on the inner peripheral side of the thermal expansion member 7, the first foam 3 is burnt down in the event of a fire, and the thermal expansion member 7 can be started to expand in a short time. , It does not hinder the expansion of the long body in the 13 direction. On the other hand, since the second foam 9 contains the thermal expansion material, even if the base resin of the second foam 9 burns, the thermal expansion member 7 will be the second foam 9 due to the expansion of the expansion material of the second foam 9. It expands preferentially to the first foam 3 side instead of the side. Therefore, the through hole 17 can be efficiently closed.

Here, in order to preferentially expand the thermal expansion member 7 toward the first foam 3 side, there is also a method of arranging a noncombustible material such as glass wool on the outer periphery of the thermal expansion member 7. However, a non-combustible material such as glass wool has a smaller amount of elastic deformation than the second foam 9, and it is difficult to fill the gap between the through hole 17 and the elongated body 13.

On the other hand, in the present embodiment, since the foam is arranged on the outer periphery of the thermal expansion member 7, and in particular, the second foam 9 is folded and arranged, a high amount of elastic deformation can be secured. Further, after the base resin is burned, it is suppressed that it completely disappears due to the expansion of the expansion material inside, and the expansion direction of the thermal expansion member 7 can be guided toward the center of the through hole 17.

(Second Embodiment)
Next, the second embodiment will be described. 7 is an exploded perspective view showing the refractory member 1a according to the second embodiment, FIG. 8A is an assembly perspective view of the refractory member 1a, and FIG. 8B is FIG. 8A. It is a cross-sectional view taken along the line BB. In the following description, the configurations that perform the same functions as the refractory member 1 are designated by the same reference numerals as those in FIGS. 1 to 6, and duplicate description will be omitted.

The refractory member 1a is substantially the same as the refractory member 1, but the method of folding the second foam 9 is different. In the refractory member 1, the second foam 9 was bent and folded at substantially the center in the width direction so that the ends were substantially aligned, but in the refractory member 1a, the second foam 9 was folded at one end. It is folded by shifting the end so that the other end protrudes from the.

As described above, the first foam 3, the thermal expansion member 7, and the second foam 9 are covered with the sheet-shaped covering 11 by overlapping and sealing the ends of the sheet-shaped covering 11. .. In the present embodiment, the protruding end of the second foam 9 is sandwiched and integrated with the end of the sheet-shaped covering 11. For example, the end portion of the covering body 11 and the end portion of the second foam 9 are sealed by heat fusion or the like.

In this case, a part of the side surface of the second foam 9 is exposed to the outside of the covering body 11, but even in this case, most of the portion of the second foam 9 is covered by the covering body 11, so that the second foam 9 is second. 2 The foam 9 is covered with the covering 11.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. Further, by integrating the second foam 9 and the covering body 11, it is possible to suppress the misalignment of the second foam 9 and the like inside the covering body 11.

(Third Embodiment)
Next, a third embodiment will be described. 9 (a) is a perspective view showing the refractory member 1b according to the third embodiment, and FIG. 9 (b) is a sectional view taken along line DD of FIG. 9 (a). The refractory member 1b has the same structure as the refractory member 1 and the like, but the form of the first foam 3 is different.

As shown in FIG. 9B, in the cross section parallel to the longitudinal direction of the first foam 3, the fireproof member 1b has the thermal expansion member 7 and the second foam at the longitudinal end of the first foam 3. Tapered portions 33a and 33b are formed in the protruding portion so as to protrude from the end portion of 9.

More specifically, in a cross section parallel to the longitudinal direction of the first foam 3, one end (right side in the drawing) of the first foam 3 protrudes from the end of the thermal expansion member 7, and the protruding portion. The first foam 3 has a tapered portion 33a so that the thickness becomes thinner toward the end portion. The angle of the first foam 3 in the tapered portion 33a on the interface side with the thermal expansion member 7 in the thickness direction is formed to be an obtuse angle.

Similarly, in the cross section parallel to the longitudinal direction of the first foam 3, the other end (left side in the drawing) of the first foam 3 also protrudes from the thermal expansion member 7, and becomes thinner toward the end. As such, it has a tapered portion 33b. The angle of the first foam 3 in the tapered portion 33b on the interface side with the thermal expansion member 7 in the thickness direction is formed at an acute angle. That is, the shapes of the tapered portions at both ends of the first foam 3 in the longitudinal direction as seen from the thermal expansion member 7 are opposite to each other.

FIG. 10 is a cross-sectional view showing a usage state of the refractory member 1b, similarly to FIG. As described above, the refractory member 1b is used by being wound around the outer circumference of the elongated body 13 so that the first foam 3 is on the inner peripheral side.

Here, when the refractory member 1b is rolled, the ends are wrapped so that the end on the side where the tapered portion 33a is formed is on the outside. At this time, the tapered portion 33a is formed so that the thickness gradually decreases from the outermost outermost second foam 9 side toward the second foam 9 side that wraps on the inner peripheral side. Therefore, the step formed when the product is rolled can be smoothed, and the gap with the through hole 17 can be efficiently filled.

Similarly, when the refractory member 1b is rolled, the ends on the side where the tapered portion 33b is formed wrap each other so as to be inside, so that the tapered portion 33b is the most of the first foam 3. It is formed so that the thickness gradually decreases from the inner peripheral side toward the first foam 3 side that wraps around the outer peripheral side. Therefore, the step formed when the product is rolled can be smoothed, and the gap with the long body 13 can be efficiently filled. At least one of the tapered portions 33a and 33b may be formed.

According to the third embodiment, the same effect as that of the first embodiment can be obtained. Further, by forming the tapered portions 33a and 33b at the longitudinal end portion of the first foam 3, the step of the wrapped portion can be made gentle when the end portions are rolled as if they were wrapped. In particular, by smoothing the step on the outermost circumference, the gap between the through hole 17 and the inner surface can be filled more reliably.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

For example, as shown in FIG. 11A, the covering body 11 covers the laminate of the first foam 3, the thermal expansion member 7, and the second foam 9, seals on the long side, and then seals the seal. The stop portion 5 may be folded back toward the second foam 9 side, and the covering body 11 may be fused to the outer surface of the second foam 9 as shown in FIG. 11 (b). In this case, in a state where the covering body 11 is folded back toward the second foam 9 side, by pressing a heated plate-shaped member against the portion, the overlapping portion between the covering bodies 11 and the second foam 9 are formed. The laminated portion between the coating body 11 and the covering body 11 can be slightly fused by the low melting point components of each other. Therefore, it is possible to suppress the movement of the laminate in the covering body 11, and the same effect as in FIG. 8 can be obtained.

1, 1a, 1b …… Fireproof member 3 ………… First foam 5 ………… Sealing part 7 ………… Thermal expansion member 9 ………… Second foam 11 ………… Cover 13 ………… Long Scale 17 ………… Through hole 19 ………… Section 20 …… Fireproof structure 33a, 33b ………… Tapered part

Claims (5)

A refractory member that is used by being wrapped around a long body.
A flammable first foam that can be elastically deformed,
The thermal expansion member laminated on the first foam and
A second foam laminated on the thermal expansion member and elastically deformable,
The first foam, the thermal expansion member, and the coating covering the second foam,
Equipped with
The second foam is a refractory member, which is made of a foam containing a thermal expansion material. The fireproof member according to claim 1, wherein the second foam is a sheet-shaped member that is folded and laminated on the thermal expansion member. The second foam is folded by shifting the ends so that the other end protrudes from one end.
The fireproof member according to claim 1, wherein the other end of the second foam is sandwiched and integrated with the end of the sheet-shaped covering. In a cross section parallel to the longitudinal direction of the first foam, at least one end of the first foam protrudes from the end of the thermal expansion member, and the first foam in the protrusion protrudes from the end. The fireproof member according to any one of claims 1 to 3, wherein the fireproof member has a tapered portion whose thickness decreases as it goes by. The fireproof member according to any one of claims 1 to 4 is used, and the fireproof member is used.
A long body is inserted through the through hole formed in the compartment,
A fireproof structure characterized in that the fireproof member is wound around the long body inside the through hole, and the gap between the long body and the inner surface of the through hole is closed by the fireproof member.

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