JP7265407B2 - Through-hole fireproof structure and fireproof material assembly - Google Patents

Description

The present invention relates to a through-hole fire protection structure and a fire-resistant material assembly suitable for penetrations of elongated objects in walls or floors located on the boundaries of building fire protection compartments.

In walls or floors located on the boundaries of building fireproof compartments, fireproof materials are used to fill the gaps between the through-holes formed in the walls or floors and long objects such as pipes and wiring. Used. This refractory material expands due to the heat of a building fire and fills the space of the through-hole (including the space created by the burning of long objects). This prevents the fire from spreading beyond the boundary of the building fire compartment. A fire-resistant structure using such a fire-resistant material is described in Patent Document 1, for example.

Here, multiple elongated objects may penetrate the boundary of the building fire compartment. In the case of forming an aggregate of elongated objects so that a plurality of elongated objects are bundled together, unevenness is present on the outer peripheral surface of the aggregate of elongated objects.

In the invention described in Patent Document 1, a thermal expansion member is provided on the radially outer side of a through hole provided at the boundary of a building fireproof compartment, and a filler that burns down in the event of a fire is provided on the radially inner side.

However, since the thermal expansion member exists only on the radially outer side, focusing on the radially inner region of the through hole, it can be said that it takes time for the thermal expansion member to expand in the event of a fire. Moreover, the thermal expansion member rapidly expands against the irregularities present on the outer peripheral surface of the aggregate of elongated objects, so that the spaces in the irregularities are not closed. Therefore, the structure is not suitable for an aggregate of long objects.

JP 2014-7892 A

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a through-hole fireproof structure suitable for a through-hole through which an aggregate of elongated objects penetrates, and a refractory material aggregate used therein.

The present invention is a through-hole fireproof structure provided in a through-hole formed in a wall or floor located on the boundary of a building fireproof compartment to prevent fire between two building fireproof compartments separated by the wall or floor, wherein The through hole is penetrated by an aggregate of elongated objects in which a plurality of elongated objects are contiguously gathered. an outer refractory material positioned radially outwardly from the inner refractory material inside the through hole and expanding due to heat during a fire; and the inner refractory material and the outer refractory material. a through-hole fireproof structure comprising a support member positioned between and retaining a shape at least at the time when the inner refractory member begins to expand in the event of a fire, and then disappearing or shrinking due to heat in the event of a fire.

According to this configuration, the support material maintains its shape at least at the time when the inner refractory material starts to expand, so that the inner refractory material can be expanded toward the aggregate of elongated objects. In addition, when the supporting material is extinguished or shrunk by the heat of the fire, the inner refractory material and the outer refractory material can be expanded even in the space created by the extinguishment or shrinkage. As a result, the through hole is closed.

Further, a recess may be present between adjacent elongated objects in the assembly of elongated objects, and a portion of each of the inner refractory material and the support member may be positioned in the recessed portion.

According to this configuration, even if there are recesses between the adjacent long objects in the long object aggregate, the inner refractory material can be brought closer to the long object aggregate.

Also, the outer refractory material may begin to expand radially inward after the support material begins to disappear or shrink due to the heat of a fire.

According to this configuration, the space created by the disappearance or shrinkage of the support material is filled with the expanded outer fireproof material, so that the fire flame can be prevented from passing through the through hole.

Also, the inner refractory material, the outer refractory material, and the support material may be integrally provided.

According to this structure, it is easy to install in the through-hole by forming an integrated structure.

Moreover, it can be provided with a dividing portion that divides the inner refractory material in the circumferential direction.

According to this configuration, since the inner refractory material is divided in the circumferential direction, the inner refractory material can easily follow the unevenness of the aggregate of elongated objects.

Also, the support member may be made of a combustible material that is destroyed by fire.

According to this configuration, the inner and outer refractory materials can be expanded over the entire portion where the support material was provided before the fire by burning out the support material in the event of a fire.

In addition, the present invention is a fireproof material assembly that is used by being inserted into a through hole formed in a wall or floor located on the boundary of a fireproof compartment of a building to prevent fire between two building fireproof compartments separated by the wall or floor. A first refractory material that extends in the longitudinal direction and expands due to heat during a fire; a second refractory material that extends in the longitudinal direction facing the first refractory material and expands due to heat during the fire; 1 Positioned between the refractory material and the second refractory material, and having a shape at the time of the start of expansion of at least one of the first refractory material and the second refractory material in the state of being inserted into the through hole in the event of a fire It is a refractory material assembly integrally provided with a support material that maintains the following and then disappears or shrinks due to heat in the event of a fire.

According to this configuration, the supporting material maintains its shape at the time when at least one of the first refractory material and the second refractory material starts to expand, thereby supporting at least one of the first refractory material and the second refractory material. Inflated in the opposite direction to the material. In addition, when the supporting material is extinguished or shrunk by the heat of the fire, the inner refractory material and the outer refractory material can be expanded even in the space created by the extinguishment or shrinkage.

Moreover, it can be provided with a dividing portion that divides at least one of the first refractory material and the second refractory material in the longitudinal direction.

According to this configuration, since at least one of the first refractory material and the second refractory material is divided in the longitudinal direction, an aggregate of elongated objects in which a plurality of elongated objects are adjacently aggregated passes through the through hole. In this case, the unevenness of the assembly of elongated objects can easily be followed by the first refractory material and the second refractory material provided with the dividing portion.

According to the arrangement of the present invention, the inner refractory material is expanded by the support material towards the aggregate of strips. Also, the inner refractory material and the outer refractory material can be expanded in the space created by the support material being extinguished or contracted by the heat of the fire. Therefore, it is possible to provide a through-hole fire prevention structure suitable for a through-hole through which an aggregate of elongated objects penetrates.

1 is a vertical cross-sectional view along the penetrating direction of a through-hole, showing an example in which a through-hole fireproof structure according to an embodiment of the present invention is provided in a wall located at the boundary of a building fireproof compartment; FIG. It is a longitudinal cross-sectional view in a cross section perpendicular to the penetration direction of the through-hole, showing the through-hole fireproof structure. FIG. 4 is a vertical cross-sectional view of the through-hole fireproof structure, taken along a cross-section perpendicular to the through-hole direction, showing a case where an aggregate of elongated objects is larger than the through-hole. It is a side view which shows the fireproof material aggregate|assembly used for the said through-hole fireproof structure. FIG. 5 is a side view showing a fireproof material assembly used in a through-hole fireproof structure according to another embodiment of the present invention; FIG. 5 is a side view showing a fireproof material assembly used in a through-hole fireproof structure according to another embodiment of the present invention; FIG. 5 is a side view showing a fireproof material assembly used in a through-hole fireproof structure according to another embodiment of the present invention; FIG. 4 is a vertical cross-sectional view of a through-hole fireproof structure according to another embodiment of the present invention, taken along a cross section perpendicular to the direction of penetration of the through-hole; (b) shows an example in which a branched refractory member branched from the outer refractory member is provided.

Next, an embodiment of the present invention will be described.

The through-hole fire prevention structure 1 of this embodiment, as shown in FIG. L0 is provided in a through hole H through which an aggregate L of elongated objects L0 are adjacently assembled. In addition, although the cross-sectional shape of the through hole H is a perfect circle in this embodiment, it may be square or the like, and the shape is not particularly limited.

Here, as shown in FIG. 2 or FIG. 3, the cross-sectional shape of each elongated object L0 in this embodiment is circular (however, it is not limited to this, and may be oval or the like). Therefore, in the state of the long object assembly L, a groove-like concave portion L1 extending in the longitudinal direction exists between the adjacent long objects L0, L0. The concave portion L1 has a substantially V shape corresponding to the curvature of the outer peripheral portion of the elongated object L0. 2 shows a case where the ratio of the aggregate of long objects L to the cross-sectional area of the through hole H is small, and FIG. 3 shows the ratio of the aggregate of long objects L to the cross-sectional area of the through hole H. is large.

This through-hole fireproof structure 1 comprises an inner refractory material 11 , an outer refractory material 12 and a support material 13 .

The inner refractory material 11 surrounds the aggregate of long objects L inside the through hole H, and contacts the outer peripheral surface of the aggregate of long objects L. As shown in FIG. The inner refractory material 11 expands due to heat during fire.

The outer refractory material 12 is positioned radially outwardly away from the inner refractory material 11 inside the through hole H. As shown in FIG. Like the inner refractory material 11, the outer refractory material 12 expands due to heat during a fire. In this embodiment, the refractory materials 11 and 12 are made of the same material. Materials forming each refractory material are known per se, and one example is a material in which thermally expandable graphite is contained in a resin. The expansion start temperature of each refractory material 11, 12 is set between 120.degree. C. and 300.degree.

Support material 13 is located between inner refractory material 11 and outer refractory material 12 . The support material 13 maintains its shape at least at the time when the inner refractory material 11 begins to expand during a fire, and then disappears or shrinks due to the heat generated during the fire. The support member 13 of the present embodiment is made of a combustible material that disappears by being destroyed by fire. Examples of combustible materials that can be used for the support material 13 include natural rubber (NR), synthetic rubbers (IIR, NBR, CR, IR, SBR, etc.), and synthetic resins (urethane, polyethylene, polypropylene, EPDM, etc.). mentioned. These materials are used to give the support member 13 flexibility and elasticity (specifically, elasticity to the extent that the support member 13 can be deformed according to the shape of the space of the through hole H when the support member 13 is arranged in the through hole H). In order to make it durable, it is desirable to foam it into a sponge-like shape during molding. Alternatively, the support material 13 may be an aggregate of tangled fibers. The ignition temperature for burning out the support material 13 is set higher than the expansion start temperature of the refractory materials 11 and 12 so that the support material 13 maintains its shape when the inner refractory material 11 starts to expand. . When the support member 13 disappears or shrinks in the event of a fire, all or part of the portion where the support member 13 was provided before the fire changes into a space. The inner refractory material 11 and the outer refractory material 12 are expanded into this space. As a result, the through hole H is closed.

Since the support member 13 maintains its shape at least at the time when the inner refractory material 11 starts to expand, the inner refractory material 11 can be expanded toward the long object assembly L. In other words, the support material 13 that maintains its shape supports the inner refractory material 11 from the radially outer direction (pulls the inner refractory material 11 against the inner refractory material 11), so that the inner refractory material 11 is supported without expanding outward in the through hole H. On the side opposite to the material 13, the material 13 is guided to expand toward the inner side where the long object assembly L is located.

After that, the support material 13 disappears or shrinks due to the heat of the fire, so that the inner fire-resistant material 11 and the outer fire-resistant material 12 expand even in the space created by the disappearance or shrinkage. In other words, the outer refractory material 12 starts to expand radially inward after the support material 13 starts to disappear or shrink due to the heat of the fire. is allowed to wrap slightly in time). Since the space created by the extinction or reduction of the support material 13 is filled with the expanded outer fireproof material 12, it is possible to prevent the fire flame from passing through the through hole H and exceeding the building fireproof section.

In particular, when the support material 13 is destroyed by fire in the event of fire as in this embodiment, both the inner refractory material 11 and the outer refractory material 12 expand, and at least a part of them are integrated. Therefore, the through hole H can be filled with the expanded inner fire-resistant material 11 and the outer fire-resistant material 12 without gaps. Using a material that disappears or shrinks (especially, a material that burns away) for the support material 13 is advantageous because the expansion of each expansive material can be accelerated.

The support member 13 has flexibility and elasticity, and deforms according to the shape of the through hole H. Specifically, compress. Elasticity is related to shape retention for supporting the inner refractory material 11 from the radially outer direction. For this reason, part of the inner refractory material 11 and the support material 13 are part of the recesses L1 existing between the adjacent long objects L0, L0 in the long object aggregate L, as shown in FIG. 2 or FIG. , partially nested. Therefore, even if there is a recess L1 between the adjacent long objects L0, L0 in the long object assembly L, the support material 13 having flexibility and elasticity enters the recess L1, and the support material 13 The supported inner refractory material 11 is brought closer to the long object assembly L. For this reason, the through-hole fire prevention structure 1 of the present embodiment is shaped like a through-hole H in which a plurality of elongated objects L0 to L0 are adjacently aggregated to form an elongated object aggregate L having unevenness including recesses L1. can be followed, it is suitable for use with such a through hole H. In addition, the inner refractory material 11 is divided in the circumferential direction, and as shown in FIG. 2 or FIG. This division will be described later in the refractory material assembly 2 .

Although the through-hole fireproof structure 1 is configured as described above, the construction method for inserting the inner fire-resistant material 11, the outer fire-resistant material 12, and the support material 13 into the through-hole H is not particularly limited. For example, the tape-shaped inner refractory material 11 is wrapped around the long object aggregate L, or the tubular inner refractory material 11 is inserted into the long object aggregate L, and the outer refractory material 12 is inserted into the through hole H. It can be adhered to the peripheral surface and then the support material 13 can be packed into the space left in the through hole H.

In this embodiment, as shown in FIG. 4, a refractory material assembly 2 integrally including an inner refractory material 11, an outer refractory material 12, and a support material 13 is used. This refractory material assembly 2 is used by inserting it into a through hole H formed in a wall W (or floor) positioned at the boundary of a building fireproof compartment. By adopting an integral structure, construction can be performed simply by winding the refractory material assembly 2 of an appropriate length around the long object assembly L, so that the refractory material assembly 2 is installed in the through hole H and the through hole Since it is easy to configure the fire prevention structure 1, workability can be improved.

The refractory material assembly 2 includes a first refractory material 21 , a second refractory material 22 , and a support material 23 . The first refractory material 21 corresponds to either the inner refractory material 11 or the outer refractory material 12 in the through-hole fireproof structure 1, and the second refractory material 22 corresponds to the inner refractory material 11 in the through-hole fireproof structure 1. or the other of the outer refractory materials 12 . Individual configurations are the same as those in the through-hole fireproof structure 1 .

The first refractory material 21 extends in the longitudinal direction of the refractory material assembly 2 and expands due to heat during a fire. The second refractory material 22 faces the first refractory material 21 in the thickness direction, extends in the longitudinal direction of the refractory material assembly 2, and expands due to heat during a fire. Support material 23 is positioned between first refractory material 21 and second refractory material 22 . In the refractory material assembly 2, the first refractory material 21 is adhered to one side surface of the supporting material 23 in the thickness direction, and the second refractory material 22 is adhered to the other side surface.

At least one of the first refractory material 21 and the second refractory material 22 is provided with a dividing portion 24 that divides the refractory material in the longitudinal direction. A plurality of dividing portions 24 are provided at approximately equal intervals in the longitudinal direction of the refractory material assembly 2 . Each dividing portion 24 extends in the width direction of the refractory material assembly 2 (the depth direction of the paper surface in FIG. 4). In the present embodiment, on the premise that the first fireproof material 21 is used as the inner fireproof material 11 , the dividing portion 24 is formed in the first fireproof material 21 . In addition, in the present embodiment, the dividing portion 24 is slit-shaped and extends to the support member 23 as well. The dividing portion 24 can have various shapes as long as the refractory material assembly 2 is not completely separated in the longitudinal direction.

The state in which the first refractory material 21 is inserted into the through hole H as the inner refractory material 11 is the state shown in FIG. 2 or FIG. When the aggregate of long objects L penetrates through the through hole H, each part of the first refractory material 21 divided by the dividing portion 24 into the unevenness including the concave portion L1 of the aggregate of long objects L is They are arranged so as to partially overlap as shown in the figure. In addition, the support member 23 is appropriately compressed according to the arrangement of the individual portions of the first refractory member 21 . In this way, the inner refractory material 11 (the first refractory material 21 in the refractory material assembly 2) can easily follow the irregularities. This follow-up allows the inner refractory material 11 to be brought closer to the long object assembly L, so that the inner refractory material 11 can be rapidly expanded radially inward of the through hole H in the event of a fire.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, with regard to the refractory material assembly 2 having an integral structure, as shown in FIG. It can also be configured by adhering the refractory material 22 . In addition, in the example shown in FIG. 5 , the dividing portion 24 is formed in the first fireproof material 21 . By using a gel-like body as the support material 23, when it is inserted into the through hole H, it can easily deform to the shape of the inside of the through hole H, so that followability can be exhibited.

Moreover, as shown in FIG. 6 or FIG. 7, the refractory material (first refractory material 21) can be separately provided on each support member 23 divided by the dividing portion 24. FIG. 6 shows the case where the refractory material (first refractory material 21) is exposed to the supporting material 23, and FIG. 7 shows the case where the refractory material (first refractory material 21) is embedded in the supporting material 23. . In this way, the second fireproof material 22 that becomes the outer fireproof material 12 in the through-hole fireproof structure 1 is preferably a flat sheet-like body in order to follow the inner peripheral surface of the through-hole H. On the other hand, the shape of the first fireproof material 21 that becomes the inner fireproof material 11 in the through-hole fireproof structure 1 is not particularly limited.

Further, with regard to the through-hole fireproof structure 1, as shown in FIG. 8(a), an intermediate fireproof member 14 can be provided between the inner fireproof member 11 and the outer fireproof member 12. As shown in FIG. The intermediate refractory material 14 may be the refractory material aggregate 2 having an integral structure, or a corresponding one may be provided between the first refractory material 21 and the second refractory material 22 .

Further, as shown in FIG. 8(b), a branched refractory member 15 branching from the outer refractory member 12 and directed inward may be provided. This branched refractory material 15, even if it is a refractory material aggregate 2 having an integral structure, is branched to the second refractory material 22 (used for the outer refractory material 12), and to the first refractory material 21. It can also be provided so as to extend in an oblique direction.

By providing the intermediate refractory material 14 and the branch refractory material 15 as described above, the starting points of expansion are increased, so that rapid expansion can be caused and the through hole H can be quickly closed.

1 through-hole fireproof structure 11 inner fireproof material 12 outer fireproof material 13 support material (through-hole fireproof structure)
2 refractory material aggregate 21 first refractory material 22 second refractory material 23 support material (refractory material aggregate)
24 dividing part W wall H through-hole L elongated object assembly L0 elongated object L1 recessed part

Claims (7)

A through-hole fireproof structure provided in a through-hole formed in a wall or floor located on the boundary of a building fireproof compartment to prevent fire between two building fireproof compartments separated by the wall or floor,
A plurality of elongated objects are contiguously assembled in the through hole , and an aggregate of elongated objects having recesses between the adjacent elongated objects penetrates through the through hole,
an inner refractory material that abuts on the assembly of elongated objects inside the through hole and expands due to heat in the event of a fire;
an outer refractory material positioned radially outwardly away from the inner refractory material inside the through-hole and expanding due to heat during a fire;
Positioned between the inner refractory material and the outer refractory material, the inner refractory material maintains its shape at least when the inner refractory material begins to expand in the event of a fire, thereby extending the inner refractory material toward the assembly of elongated objects. a support that is inflated and then extinguished or contracted by the heat of a fire ;
A through-hole fire protection structure , wherein a portion of each of said inner refractory material and said support material is located in said recess of said elongated article assembly . 2. The through-hole fire protection structure according to claim 1 , wherein the outer refractory material begins to expand radially inward after the support material begins to extinguish or shrink due to the heat of a fire. The through-hole fireproof structure according to claim 1 or 2 , wherein the inner refractory material, the outer refractory material, and the support material are integrally provided. The through-hole fireproof structure according to claim 3 , comprising a dividing portion that divides the inner fireproof material in the circumferential direction. The through-hole fire protection structure according to any one of claims 1 to 4 , wherein the support member is made of a combustible material that burns down in the event of a fire. A fireproof material assembly applied to the through-hole fire protection structure according to any one of claims 1 to 5, which is used by inserting it into a through-hole formed in a wall or floor located on the boundary of a building fire protection compartment. , a group of fire-resistant materials that provide fire protection between two building fire-blocking compartments separated by the wall or floor;
a first refractory material that extends in the longitudinal direction and expands due to heat during a fire;
a second refractory material that extends in the longitudinal direction facing the first refractory material and expands due to heat during a fire;
Positioned between the first refractory material and the second refractory material and being inserted into the through-hole at the time of fire, when at least one of the first refractory material and the second refractory material starts to expand. A refractory material assembly integrally provided with a support material that maintains its shape and then disappears or shrinks due to heat in the event of a fire. 7. The refractory assembly according to claim 6 , further comprising a dividing portion that longitudinally divides at least one of the first refractory material and the second refractory material.

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