JP2020183663A - Fire proof structure of through hole, and fire proof material assembly - Google Patents

Abstract

To provide a fire proof structure of a through hole and a fire proof material assembly suitable for a through hole which a long object assembly penetrates.SOLUTION: A fire proof structure of a through hole is provided in a through hole H formed in a wall W or a floor positioned at a boundary of a building fire proof compartment and prevents fire between two building fire proof compartments separated by the wall or the floor. In the through hole H, a long object assembly L in which a plurality of long objects L0 to L0 are assembled to be adjacent penetrates. The fire proof structure of a through hole 1 comprises: an inside fire proof material 11 being in contact with the long object assembly L and expanding by heat in a fire inside the through hole H; and an outside fire proof material 12 positioned separated from the inside fire proof material 11 radially outwardly and expanding by heat in a fire inside the through hole H; and a support material 13 positioned between the inside fire proof material 11 and the outside fire proof material 12, keeping a shape at least at a time point of start of expansion of the inside fire proof material 11 in fire, and then disappearing or reducing by heat in a fire.SELECTED DRAWING: Figure 2

Description

The present invention relates to a through-hole fireproof structure and a refractory aggregate suitable for a penetration of a long object in a wall or floor located at the boundary of a building fireproof compartment.

In the wall or floor located at the boundary of the building fire protection section, the penetration part of long objects such as pipes and wiring is covered with refractory material to fill the gap between the through hole formed in the wall or floor and the long object. Used. This refractory material expands due to the heat of a building fire to fill the space of the through hole (including the space created by the burning of a long object). As a result, it is possible to prevent the spread of fire beyond the boundary of the building fire protection section. A refractory structure using such a refractory material is described in, for example, Patent Document 1.

Here, a plurality of long objects may penetrate the boundary of the building fire protection section. When forming a long object aggregate that is assembled adjacent to each other so that a plurality of long objects are bundled, unevenness is present on the outer peripheral surface of the long object aggregate.

In the invention described in Patent Document 1, a thermal expansion member is provided on the outer diameter of the through hole provided at the boundary of the building fire protection section, and a filler that burns out in the event of a fire is provided on the inner diameter.

However, since the thermal expansion member exists only on the outer diameter, it can be said that it takes time for the thermal expansion member to expand in the event of a fire, focusing on the inner diameter region of the through hole. Moreover, the thermal expansion member rapidly expands with respect to the unevenness existing on the outer peripheral surface of the long object aggregate, so that the space in the uneven portion is not closed. For this reason, the structure is not suitable for long object aggregates.

Japanese Unexamined Patent Publication No. 2014-7892

Therefore, it is an object of the present invention to provide a through-hole fireproof structure suitable for a through hole through which a long object aggregate penetrates, and a refractory material aggregate used for the through hole fireproof structure.

The present invention is a through-hole fire protection structure provided in a through hole formed in a wall or floor located at the boundary of a building fire protection compartment and for preventing fire between two building fire protection compartments separated by the wall or floor. A long object aggregate in which a plurality of long objects are assembled adjacent to each other penetrates through the through hole, and inside the through hole, it comes into contact with the long object aggregate and expands due to heat during a fire. An inner fire-resistant material, an outer fire-resistant material that is located inside the through hole and is located apart from the inner fire-resistant material in the outer diameter direction and expands due to heat at the time of a fire, and the inner fire-resistant material and the outer fire-resistant material. It is a through-hole fireproof structure that is located between them and has a support material that retains its shape at least at the time of the start of expansion of the inner fireproof material in the event of a fire and then disappears or shrinks due to the heat of the fire.

According to this configuration, the support material retains 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 long object aggregate. Further, when the support material is extinguished or reduced by the heat at the time of fire, the inner refractory material and the outer refractory material can be expanded in the space created by the extinction or reduction. As a result, the through hole is closed.

Further, in the long object aggregate, there is a recess between adjacent long objects, and a part of each of the inner refractory material and the support material can be located in the recess.

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

Further, the outer refractory material may start expanding in the in-diameter direction after the support material starts to be extinguished or reduced by the heat at the time of fire.

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

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

According to this configuration, it is easy to install in the through hole by making it an integral configuration.

Further, it may be provided with a dividing portion for dividing the inner refractory material in the circumferential direction.

According to this configuration, since the inner refractory material is divided in the circumferential direction, it is easy for the inner refractory material to follow the unevenness of the long object aggregate.

Further, it can be assumed that the support material is made of a flammable material that burns out in the event of a fire.

According to this configuration, the support material is burnt down in the event of a fire, so that the inner refractory material and the outer refractory material can be expanded over the entire portion where the support material was provided before the fire.

The present invention is also used by inserting it into a through hole formed in a wall or floor located at the boundary of a building fire protection compartment, and is a refractory material aggregate that protects between two building fire protection compartments separated by the wall or floor. A first refractory material that extends in the longitudinal direction and expands due to the heat of a fire, a second refractory material that extends in the longitudinal direction facing the first refractory material and expands due to the heat of a fire, and the first refractory material. 1 Located between the refractory material and the second refractory material, and in the state of being inserted into the through hole in the event of a fire, the shape at the time of the start of expansion of at least one of the first refractory material and the second refractory material. It is a refractory material aggregate that is integrally equipped with a support material that disappears or shrinks due to the heat of a fire.

According to this configuration, the support 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. It is inflated in the opposite direction of the material. Further, when the support material is extinguished or reduced by the heat at the time of fire, the inner refractory material and the outer refractory material can be expanded in the space created by the extinction or reduction.

Further, it may 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, at least one of the first refractory material and the second refractory material is divided in the longitudinal direction, so that a long object aggregate in which a plurality of long objects are adjacently assembled penetrates the through hole. In this case, it is easy to make the unevenness of the long object aggregate follow the first refractory material and the second refractory material having a divided portion.

According to the configuration of the present invention, the inner refractory material can be expanded by the support material toward the long object aggregate. In addition, the inner refractory material and the outer refractory material can be expanded in the space created by the support material being extinguished or reduced by the heat of a fire. Therefore, it is possible to provide a through-hole fireproof structure suitable for a through-hole through which a long object aggregate penetrates.

It is a vertical cross-sectional view along the penetration direction of a through hole which shows the example which the through hole fire prevention structure which concerns on one Embodiment of this invention is provided in the wall located at the boundary of the building fire prevention section. It is a vertical sectional view in the cross section orthogonal to the through-hole penetration direction which shows the through-hole fire protection structure. It is a vertical cross-sectional view in the cross section orthogonal to the through-hole penetration direction which shows the case where the long object aggregate is larger than the through-hole fire protection structure. It is a side view which shows the refractory material aggregate used for the said through hole fireproof structure. It is a side view which shows the refractory material aggregate used for the through hole fire prevention structure which concerns on other embodiment of this invention. It is a side view which shows the refractory material aggregate used for the through hole fire prevention structure which concerns on other embodiment of this invention. It is a side view which shows the refractory material aggregate used for the through hole fire prevention structure which concerns on other embodiment of this invention. Regarding the through-hole refractory structure according to another embodiment of the present invention, it is a vertical cross-sectional view in a cross section orthogonal to the through-hole through direction, in which (a) is an intermediate refractory between the inner and outer refractory materials. An example in which a material is provided is shown, and (b) shows an example in which a branched refractory material branched from the outer refractory material is provided.

Next, the present invention will be described by taking up one embodiment.

As shown in FIG. 1, the through-hole fireproof structure 1 of the present embodiment is a through-hole H formed in a wall W (or floor) located at the boundary of a building fireproof section, and is a plurality of long objects L0 to It is provided in a through hole H through which a long object aggregate L in which L0 is assembled adjacent to each other penetrates. In the present embodiment, the cross-sectional shape of the through hole H is a perfect circle, but it may be a quadrangle or the like, and the shape is not particularly limited.

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

The through-hole refractory structure 1 includes an inner refractory material 11, an outer refractory material 12, and a support material 13.

The inner refractory material 11 surrounds the long object aggregate L inside the through hole H and comes into contact with the outer peripheral surface of the long object aggregate L. The inner refractory material 11 expands due to the heat of a fire.

The outer refractory material 12 is located inside the through hole H at a distance from the inner refractory material 11 in the outer diameter direction. Like the inner refractory material 11, the outer refractory material 12 expands due to the heat of a fire. In this embodiment, the refractory materials 11 and 12 are made of the same material. The material itself for forming each refractory material is known, and an example thereof includes a material containing heat-expandable graphite in a resin. The expansion start temperature of each refractory material 11 and 12 is set between 120 ° C. and 300 ° C.

The support member 13 is located between the inner refractory material 11 and the outer refractory material 12. The support member 13 retains its shape at least at the time when the inner refractory material 11 starts to expand in the event of a fire, and then disappears or shrinks due to the heat of the fire. The support material 13 of the present embodiment is made of a flammable material that is extinguished by burning in the event of a fire. Examples of flammable materials that can be used for the support material 13 include natural rubber (NR), synthetic rubber (IIR, NBR, CR, IR, SBR, etc.), and synthetic resin (urethane, polyethylene, polypropylene, EPDM, etc.). Can be mentioned. Using these materials, the support member 13 is provided with flexibility and elasticity (specifically, elasticity that 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 have it, it is desirable to foam it during molding to make it, for example, sponge-like. Further, the support member 13 may be an aggregate of entwined fibers. The ignition temperature related to the burning of the support material 13 is set higher than the expansion start temperature of each of the refractory materials 11 and 12 so that the support material 13 retains its shape at the start of expansion of the inner refractory material 11. .. When the support member 13 disappears or shrinks in the event of a fire, the whole or a 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 can be expanded in this space. As a result, the through hole H is closed.

Since the support member 13 retains 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 aggregate L. That is, the support member 13 that maintains the shape supports the inner refractory material 11 from the outside diameter direction (stretches against the inner refractory material 11), so that the inner refractory material 11 is supported without expanding outward in the through hole H. It is guided so as to expand inward where the long object aggregate L is located on the opposite side of the material 13.

After that, the support member 13 is extinguished or reduced by the heat at the time of fire, so that the inner refractory material 11 and the outer refractory material 12 can be expanded in the space created by the extinction or reduction. That is, the outer refractory material 12 starts expanding in the inward direction after the support material 13 starts to disappear or shrink due to the heat at the time of fire (note that the shape change of the outer refractory material 12 and the support material 13). Therefore, it is permissible to wrap a little in time). Since the space created by the disappearance or reduction of the support member 13 is filled with the expanded outer refractory material 12, it is possible to prevent the flame of the fire from passing through the through hole H and exceeding the building fire protection section.

In particular, when the support material 13 is burnt down in the event of a fire as in the present embodiment, the inner refractory material 11 and the outer refractory material 12 expand together, and both are integrated at least in a part. Therefore, the through hole H can be filled with the expanded inner refractory material 11 and the outer refractory material 12 without any gap. As described above, it is advantageous to use a material (particularly, a material that burns out) that disappears or shrinks due to the heat of a fire as the support material 13 because the expansion of each expansion material can be promoted.

The support member 13 has flexibility and elasticity, and is deformed according to the shape of the through hole H. Specifically, it is compressed. The elasticity is related to the shape retention for supporting the inner refractory material 11 from the outer diameter direction. Therefore, as shown in FIG. 2 or 3, each part of the inner refractory material 11 and the support material 13 is formed in the recess L1 existing between the adjacent long objects L0 and L0 in the long object aggregate L. , Positioned to partially penetrate. Therefore, even if the recess L1 exists between the adjacent long objects L0 and L0 in the long object aggregate L, the flexible and elastic support member 13 enters the recess L1 and enters the support member 13. The supported inner refractory material 11 is brought closer to the long object aggregate L. Therefore, the through-hole fireproof structure 1 of the present embodiment has a shape in a through-hole H in which a plurality of long objects L0 to L0 are adjacently assembled and a long object aggregate L having irregularities including a recess L1 exists. Is suitable for use in such a through hole H because it can follow. The inner refractory material 11 is divided in the circumferential direction, and as shown in FIGS. 2 or 3, the divided individual inner refractory materials 11 enter the recess L1 so as to be inconsistent with each other. This division will be described in the refractory material assembly 2 described later.

Although the through-hole refractory structure 1 is configured as described above, the construction method for inserting the inner refractory material 11, the outer refractory 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 wound around the long object assembly L, the tubular inner refractory material 11 is inserted into the long object assembly L, and the outer refractory material 12 is inserted into the through hole H. After adhering to the peripheral surface, the support member 13 can be packed into the space remaining in the through hole H.

In the present embodiment, as shown in FIG. 4, a refractory aggregate 2 including an inner refractory material 11, an outer refractory material 12, and a support material 13 is used. The refractory material aggregate 2 is used by being inserted into a through hole H formed in a wall W (or floor) located at the boundary of a building fire protection section. Since the construction can be performed simply by winding the refractory material assembly 2 of an appropriate length around the long object assembly L by forming an integral structure, the refractory material assembly 2 is installed in the through hole H and the through hole is formed. Since it is easy to configure the fireproof 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 refractory structure 1, and the second refractory material 22 is the inner refractory material 11 in the through-hole refractory structure 1. Or corresponds to the other of the outer refractory materials 12. The individual configurations are the same as those in the through-hole fire protection structure 1.

The first refractory material 21 extends in the longitudinal direction in the refractory material assembly 2 and expands due to the heat of a fire. The second refractory material 22 faces the first refractory material 21 in the thickness direction, extends in the longitudinal direction in the refractory aggregate 2, and expands due to the heat of a fire. The support material 23 is located between the first refractory material 21 and the second refractory material 22. In the refractory material assembly 2, the first refractory material 21 is adhered to one side surface of the support member 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 the dividing portions 24 are provided at substantially equal intervals in the longitudinal direction of the refractory material assembly 2. Each of the divided portions 24 extends in the width direction (paper surface depth direction in FIG. 4) of the refractory material assembly 2. In the present embodiment, on the premise that the first refractory material 21 is used for the inner refractory material 11, the divided portion 24 is formed in the first refractory material 21. In this embodiment, the divided portion 24 has a slit shape and extends to the support member 23. The divided portion 24 can have various shapes as long as the refractory material aggregate 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 long object aggregate L penetrates the through hole H, each portion of the first refractory material 21 divided by the dividing portion 24 is formed on the uneven surface including the concave portion L1 of the long object aggregate L. As shown in the figure, they are arranged so as to partially overlap. The support material 23 is appropriately compressed according to the arrangement of the individual parts of the first refractory material 21. In this way, the inner refractory material 11 (the first refractory material 21 in the refractory material aggregate 2) can easily follow the unevenness. By following this, the inner refractory material 11 can be brought closer to the long object aggregate L, so that the inner refractory material 11 can be rapidly expanded in the inner diameter direction 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-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, with respect to the integrally configured refractory aggregate 2, as shown in FIG. 5, a bag containing a flammable gel-like body is used as the support material 23, and the first refractory material 21 and the second are used on each surface in the thickness direction. It can also be configured by adhering it to the refractory material 22. In the example shown in FIG. 5, the divided portion 24 is formed in the first refractory material 21. By using a gel-like body as the support material 23, when it is inserted into the through hole H, it is easily deformed with respect to the shape inside the through hole H, so that the followability can be exhibited.

Further, as shown in FIG. 6 or 7, the refractory material (first refractory material 21) may be separately provided on the individual support members 23 divided by the dividing portion 24. FIG. 6 shows a case where the refractory material (first refractory material 21) is exposed to the support material 23, and FIG. 7 shows a case where the refractory material (first refractory material 21) is embedded in the support material 23. .. As described above, the second refractory material 22 serving as the outer refractory material 12 in the through hole fireproof structure 1 is preferably a flat sheet-like body so as to be along the inner peripheral surface of the through hole H. On the other hand, the shape of the first refractory material 21 serving as the inner refractory material 11 in the through-hole refractory structure 1 is not particularly limited.

Further, regarding the through-hole refractory structure 1, as shown in FIG. 8A, an intermediate refractory material 14 may be provided between the inner refractory material 11 and the outer refractory material 12. Even if the intermediate refractory material 14 is an integrally configured refractory material aggregate 2, a corresponding one may be provided between the first refractory material 21 and the second refractory material 22.

Further, as shown in FIG. 8B, a branched refractory material 15 that branches from the outer refractory material 12 and heads inward may be provided. Even if the branched refractory material 15 is an integrally configured refractory aggregate 2, the corresponding one is branched with respect to the second refractory material 22 (used for the outer refractory material 12) and becomes the first refractory material 21. It can also be provided so as to extend diagonally toward it.

By providing the intermediate refractory material 14 and the branch refractory material 15 as described above, the starting point of expansion is increased, so that rapid expansion can be generated 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 assembly 21 1st refractory material 22 2nd refractory material 23 Support material (refractory material assembly)
24 Dividing part W Wall H Through hole L Long object aggregate L0 Long object L1 Recess

Claims (8)

It is a through-hole fire prevention structure that is provided in a through hole formed in a wall or floor located at the boundary of a building fire prevention section and that prevents fire between two building fire prevention sections separated by the wall or floor.
A long object aggregate in which a plurality of long objects are adjacently assembled penetrates through the through hole.
Inside the through hole, an inner refractory material that comes into contact with the long object aggregate and expands due to the heat of a fire.
Inside the through hole, an outer refractory material that is located away from the inner refractory material in the outer diameter direction and expands due to the heat of a fire.
A support material that is located between the inner refractory material and the outer refractory material, retains its shape at least at the time of the start of expansion of the inner refractory material in the event of a fire, and then disappears or shrinks due to the heat of the fire. With a through-hole fire protection structure. In the long object aggregate, there is a recess between adjacent long objects.
The through-hole fireproof structure according to claim 1, wherein a part of each of the inner refractory material and the support material is located in the recess. The through-hole fireproof structure according to claim 1 or 2, wherein the outer refractory material starts to expand inward in diameter after the support material starts to extinguish or shrink due to heat at the time of fire. The through-hole refractory structure according to any one of claims 1 to 3, further comprising the inner refractory material, the outer refractory material, and the support material integrally. The through-hole fireproof structure according to claim 4, further comprising a dividing portion for dividing the inner refractory material in the circumferential direction. The through-hole fireproof structure according to any one of claims 1 to 5, wherein the support material is made of a flammable material that burns out in the event of a fire. A refractory material aggregate that is used by inserting it into a through hole formed in a wall or floor located at the boundary of a building fire protection compartment to prevent fire between two building fire protection compartments separated by the wall or floor.
A first refractory material that extends in the longitudinal direction and expands due to the heat of a fire,
A second refractory material that extends in the longitudinal direction facing the first refractory material and expands due to the heat of a fire.
It is located between the first refractory material and the second refractory material, and when a fire occurs while being inserted into the through hole, at least one of the first refractory material and the second refractory material starts to expand. A refractory aggregate that is integrally equipped with a support material that retains its shape and then disappears or shrinks due to the heat of a fire. The refractory aggregate according to claim 7, further comprising a dividing portion that divides at least one of the first refractory material and the second refractory material in the longitudinal direction.

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