JP2023157691A - Fireproof interlayer material, fireproof structure and construction method of fireproof structure - Google Patents

Abstract

To provide a fireproof interlayer material which can be easily constructed while improving fire resistance efficiency by increasing a filling density of a fireproof material filling a gap formed between a floor 200 and an outer wall 300 and can secure fireproof efficiency, a fireproof structure and a construction method of the fireproof structure.SOLUTION: A core material 111 consists of a rock wool R which is an incombustible material with a lamination direction of an inorganic fiber in a direction between a floor 200 and an outer wall 300 and it is inserted along a longitudinal direction of a gap G formed between the floor 200 and the outer wall 300.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fireproof interlayer material, a fireproof structure, and a construction method for a fireproof structure, and particularly to a fireproof interlayer material, a fireproof structure, and a construction method for a fireproof structure placed in a gap formed between a floor and an exterior wall of a building. Regarding the method.

Traditionally, in high-rise buildings, non-load-bearing walls called curtain walls are fitted into frameworks such as foundations and columns to prevent the load from being directly borne by the walls. The external wall construction method is adopted.

In this exterior wall construction method, for example, between the floor and the exterior wall, a gap called a predetermined interlayer gap is formed due to the joints between members or the structure, and this gap is a weak point in terms of fire resistance. In the event of an actual fire, the fire will spread from this space to the upper and lower floors, so it is necessary to close this space.

Additionally, in fireproof buildings, including steel-framed buildings, fireproof divisions are installed for the purpose of keeping the spread of fire and smoke within a certain range in the event of a fire. This fireproof division prevents fire and smoke from spreading from the space where the fire broke out to neighboring spaces for a certain period of time, even if a fire breaks out in a part of multiple spaces divided by outer walls or partition walls, for example.

Therefore, by inserting a fall prevention hardware between the layers formed between the floor and the outer wall, and placing a fireproof interlayer material with a waterproof and fireproof membrane on the top surface on top of the fall prevention metal, the floor and outer wall are brought into close contact with each other. A method has been adopted in which a layer formed between a floor and an outer wall is closed to create a fireproof compartment (for example, see Patent Document 1).

Japanese Patent Application Publication No. 7-42271

However, if the packing density of the fire-resistant interlayer material that is filled between the layers formed between the floor and the exterior wall is increased in order to improve fire protection performance, the work of filling the fire-resistant interlayer material between the layers takes time, making construction difficult. There was a problem where it got worse.

In order to improve the fireproof performance of a fireproof compartment, it is necessary not only to improve the fireproof performance of the exterior walls and partition walls, but also to improve the fireproof performance of the fireproof interlayer material used to close the gap between the floors and the exterior walls. must be improved.

In order to improve the fire resistance performance of this refractory interlayer material, the packing density of the refractory interlayer material may be increased. In other words, if a high-density fireproof interlayer material is filled between the layers formed between the floor and the outer wall, the fireproof performance in the fireproof compartment can be improved.

In order to fill the refractory interlayer material between the layers formed between the floor and the outer wall without any gaps, the refractory interlayer material should be filled with the refractory interlayer material in advance so that the width in the floor/outer wall direction is between the floor and the outer wall between the interlayers filled with the refractory interlayer material. By forming the material with a large width and press-fitting the large width fireproof interlayer material between the layers, the fireproof interlayer material is brought into close contact with the floor and the outer wall between the floor and the outer wall, thereby closing the space between the layers.

However, it is extremely difficult to insert a denser fire-resistant interlayer material between the layers formed between the floor and the outer wall.
Current fireproofing methods vary depending on the location and structure, so they are often not specified in detail. For this reason, many fire-resistant interlayer materials are made of rock wool with a density of 80 kg/m3, for example. In order to improve the fireproof performance in the fireproof compartment, a higher density fireproof interlayer material is filled between the layers.

Specifically, in the questions and answers to the Architectural Institute of Japan's "Thoughts on design and construction of compartments for fire safety" (1st edition, 1st printing, published March 15, 2017), In response to the question, ``What density is generally desirable when rock wool is used as a filling material for sections?'', the answer was, ``Since the penetrations of sections are the biggest weak point in terms of fire protection, it is important to fill them with rock wool.'' In general, if there is no specified packing density, it is desirable for rock wool filling to have a density of 150 kg/cubic meter or more.'' (https://www.aij.or.jp/jpn/ databox/2017/20171025qa.pdf).

For example, considering the case where rock wool formed at a density of 150 kg/m3 is applied to the fireproof interlayer material disclosed in Patent Document 1, as the density of rock wool increases, the elastic force of the fireproof interlayer material increases. hardness increases.

When a high-density refractory interlayer material is press-fitted between layers, the high-density refractory interlayer material decreases in elastic force and increases in hardness, so it hardly shrinks. For this reason, if a high-density refractory interlayer material having a width larger than the interlayer is formed in advance, there is a problem in that it takes a lot of time to press-fit the high-density refractory interlayer material.

Therefore, it is also possible to form a high-density refractory interlayer material with the same width as the interlayer material. However, with the exterior wall construction method called curtain walling, the structure is such that the walls do not directly bear the load of the building, so the layer between the floor and the exterior wall is subject to displacement when the building shakes due to wind, etc. There are cases.

At this time, if the width between the layers becomes large, a problem arises in that the high-density refractory interlayer material falls from between the layers. If the fireproof interlayer material falls from between the layers, there will be no space between the layers, making it impossible to provide a fireproof division.

Another method to improve the packing density using refractory interlayer material between the layers is to further increase the volume of the preformed refractory interlayer material, compress it, and insert it between the layers to improve the packing density. It will be done.

As a specific example, it is conceivable to set the density of the refractory interlayer material to 80 kg/m3, which is the same as before, and to make the volume of the refractory interlayer material formed in advance twice that of the conventional refractory interlayer material.

In this case, although the density of the refractory interlayer material before being inserted between the layers is 80 kg/m3, by compressing this refractory interlayer material to 1/2 and filling it between the layers, a packing density of 150 kg/m3 or more can be achieved. Obtainable. However, the work of inserting the refractory interlayer material between the layers while compressing it to 1/2 on site is extremely inefficient and impractical.

The present invention has been made in view of these points, and it is possible to improve fire resistance performance and facilitate construction by increasing the packing density of the fireproof material that fills the gap formed between the floor and the outer wall. The purpose of the present invention is to provide a fireproof interlayer material, a fireproof structure, and a construction method of a fireproof structure that can ensure fireproof performance.

In order to solve the above problem, in the present invention, in a fireproof interlayer material placed in a gap formed between a floor and an exterior wall of a building, the inorganic fibers are laminated in the direction between the floor and the exterior wall. A refractory interlayer material is provided, characterized in that it comprises a core material made of a non-combustible material and inserted along the longitudinal direction of the gap.
As a result, a core material made of a noncombustible material with the inorganic fibers stacked in the direction between the floor and the outer wall is inserted along the longitudinal direction of the gap.

Further, in the present invention, in the fire protection structure having a fire-resistant interlayer material in a gap formed between a floor and an outer wall of a building, the fire-resistant interlayer material includes the inorganic fibers in a direction between the floor and the outer wall. There is provided a fireproof structure characterized by comprising a core material made of noncombustible material with a lamination direction oriented and inserted along the longitudinal direction of the gap.
As a result, a core material made of a noncombustible material with the inorganic fibers stacked in the direction between the floor and the outer wall is inserted along the longitudinal direction of the gap.

Further, in the method of constructing a fireproof structure having a fireproof interlayer material in a gap formed between a floor and an outer wall of a building, the present invention provides a method for constructing a fireproof structure in which a fireproof interlayer material is provided with the inorganic material in a direction between the floor and the outer wall in the fireproof interlayer material. a step in which a core material made of a noncombustible material with the fiber stacking direction oriented and inserted along the longitudinal direction of the gap is compressed in the stacking direction of the inorganic fibers; and compressing in the stacking direction of the inorganic fibers. Provided is a method for constructing a fireproof structure, comprising a step of inserting the fireproof interlayer material into the gap, and a step of loosening and releasing the pressure compressed in the lamination direction of the inorganic fibers. .

As a result, the fireproof interlayer material is made of a noncombustible material with the lamination direction of the inorganic fibers oriented in the direction between the floor and the outer wall, and the core material inserted along the longitudinal direction of the gap is oriented in the lamination direction of the inorganic fibers. The refractory interlayer material that has been compressed in the direction in which the inorganic fibers are laminated is inserted into the gap, and the pressure compressed in the direction in which the inorganic fibers are laminated is relaxed and released.

According to the fireproof interlayer material, the fireproof structure, and the construction method of the fireproof structure of the present invention, the core material made of a noncombustible material in which the lamination direction of inorganic fibers is oriented in the direction between the floor and the outer wall is oriented in the longitudinal direction of the gap. Since the core material is inserted between the layers, the lamination direction in which the core material has excellent elasticity is oriented toward the direction between the floor and the outer wall. Therefore, the refractory interlayer material, which has been difficult to insert into the gap, can be easily inserted and fixed.

Further, the core material is inserted between the layers with the direction of the fibers having excellent strength characteristics being oriented in the direction of insertion between the layers. Therefore, it is possible to prevent the refractory interlayer material from being deformed when inserting the refractory interlayer material into the gap.

As a result, by increasing the packing density of the fireproof material that fills the gap formed between the floor and the outer wall, it is possible to easily perform construction while improving fireproof performance, thereby ensuring fireproof performance.

It is a sectional view showing details of the fireproof interlayer material in a 1st embodiment. It is a perspective view which shows the example of a part of process at the time of forming a core material. FIG. 2 is a sectional view showing a state in which the fireproof interlayer material according to the first embodiment is installed in a gap formed between a floor and an outer wall. FIG. 2 is a sectional view showing a state in which the fireproof interlayer material according to the first embodiment is supported and installed in a gap formed between a floor and an outer wall with a support metal fitting. It is a sectional view showing details of the fireproof interlayer material in a 2nd embodiment. It is a cross-sectional view showing a fireproof structure in a state in which a fireproof interlayer material, a support metal fitting, and a metal plate according to a second embodiment are installed in a gap G formed between a floor and an outer wall.

Embodiments of the present invention will be described in detail below with reference to the drawings.
[First embodiment]
FIG. 1 is a cross-sectional view showing details of the fireproof interlayer material in the first embodiment.
As shown in FIG. 1, the fireproof interlayer material 100 includes a core material 110, a top covering material 120, an adhesive surface 130, and a release paper 140.

The core material 110 is for filling the gap G formed between the floor 200 and the outer wall 300 (not shown here), and the core material 110 is for filling the gap G formed between the floor 200 and the outer wall 300 (not shown here). It is provided with an outer covering material 112 provided so as to completely cover it. In this embodiment, a case will be described in which a gap G of approximately 50 mm formed between a floor 200 and an outer wall 300 (not shown) is filled with the fireproof interlayer material 100.

The core material 111 is filled in a gap G formed between the floor 200 and the outer wall 300 (not shown here) and is made of a material having sufficient fire resistance. A specific example of the material is rock wool having a density of about 150 kg/m3 or more than 150 kg/m3. In addition to rock wool, it can also be formed using inorganic fibers such as ceramic fibers and glass wool.

The core material 111 is a heat insulating material in which inorganic fibers such as rock wool are laminated in one direction and fixed into a rectangular bar shape by adding a fixing agent such as a thermosetting resin. In this way, since the core material 111 has inorganic fibers laminated in one direction, the fiber direction is formed in one direction of the inorganic fibers.

Here, the direction in which inorganic fibers such as rock wool are laminated, that is, the direction in which inorganic fibers overlap, is referred to as the lamination direction, and the direction of the fibers formed by laminating inorganic fibers, that is, the direction perpendicular to the lamination direction. is referred to as the fiber direction in the following explanation. This core material 111 has excellent elasticity because inorganic fibers are laminated in the lamination direction. On the other hand, the fiber direction has excellent strength properties.

When laminating inorganic fibers such as rock wool, they have excellent elasticity in the stacking direction, so if you try to form something that exceeds a certain height, it will collapse due to its excellent elasticity and its own load. As a result, there were problems such as poor height accuracy in the stacking direction and difficulty in forming the height in the stacking direction necessary to fill the gap between the floor 200 and the outer wall 300.

For this reason, in conventional fireproof interlayer materials, the fibers are inserted so that the space between the floor 200 and the outer wall 300 can be sufficiently filled, with the direction of the fibers facing in the direction between the floor 200 and the outer wall 300. However, since the fiber direction has excellent strength characteristics, it is difficult to compress it and it is difficult to compress it and insert it. Furthermore, rock wool having a high density of, for example, around or above 150 kg/m3 is even more difficult to compress and insert.

Therefore, the core material 111 of the fireproof interlayer material 100 of this embodiment is inserted with the stacking direction directed toward the direction between the floor 200 and the outer wall 300 into which it is inserted. That is, the core material 111 is formed such that the fiber direction is oriented in the height dimension H direction, and the lamination direction is oriented in the width dimension W direction.

Moreover, the width dimension W of the core material 111 is formed to be larger than the gap G between the floor 200 and the outer wall 300 of the building. Specifically, for a gap G of about 50 mm formed between the floor 200 and the outer wall 300 (not shown here), the width dimension W is preferably formed to be about 55 mm to 65 mm. Note that the depth dimension in the longitudinal direction of the core material 111 (not shown here) can be arbitrarily formed according to the width of the gap G between the floor 200 and the outer wall 300 of the building.

At this time, the core material 111 is inserted with the stacking direction, which has excellent elasticity, facing the direction between the floor 200 and the outer wall 300, so the core material 111 is inserted in the width direction W, which has high elasticity. With the core material 111 compressed, the core material 111 can be press-fitted between the floor 200 and the outer wall 300.

Further, since the core material 111 has excellent strength properties in the height direction H, which is the fiber direction, the shrinkage width is small even when it is pushed into the gap G between the floor 200 and the outer wall 300 of a building from above. As a result, the core material 111 is inserted between the floor 200 and the outer wall 300 while maintaining the height of the core material 111 that has been formed. That is, the refractory interlayer material 100 can be filled between the floor 200 and the outer wall 300 to a desired height without shrinking.

On the circumferential surface of the core material 111, an outer cover material 112 made of, for example, a polyethylene film that does not allow water to pass through is provided so as to completely cover the outer surface of the core material 111. Thereby, the core material 111 is protected from moisture such as rainwater by the outer cover material 112.

An upper surface covering material 120 is adhesively fixed to the upper surface of the core material 111 of the core material 110 in the fiber direction so as to completely cover the upper surface of the core material 110. The material of the upper surface covering material 120 is, for example, an aluminum glass cloth sheet, which is a fireproof material, and is both waterproof and resistant to welding sparks.

The upper surface covering material 120 is formed with an extension portion 121 passing through the core material 110 in the longitudinal direction so as to protrude in both outward directions beyond the width dimension W of the core material 110 .
An adhesive surface 130 is provided on the side of the extension part 121 to which the core material 110 is fixed, and a release paper 140 is pasted so as to completely cover the adhesive surface 130, and the pasted release paper 140 is adhesive. The surface 130 is protected. When adhering and fixing the extension portion 121 to a predetermined location, the release paper 140 is peeled off from the adhesive surface 130 and adhered.

When the core material 110 is arranged in the gap G between the floor 200 and the outer wall 300 of the building, one of the extension parts 121 is attached to the side or top surface of the floor 200 via the adhesive surface 130. By attaching the other extension portion 121 to the side surface of the outer wall 300 via the adhesive surface 130, moisture such as rainwater can be prevented from entering the core material 110.

Further, since the entire upper surface of the core material 110 is completely covered by the upper surface covering material 120, for example, when welding work is performed on the upper floor, welding sparks falling from the upper floor during welding work will directly hit the core material 110. Damage to the core material 110 can be prevented.

As a result, the welding sparks hit the core material 110, damaging the outer covering material 112, and moisture such as rainwater entering the core material 110 through the gap G in the damaged outer covering material 112. Corrosion of the refractory interlayer material 100 can be prevented.

Moreover, since the top covering material 120 adhesively fixed to the core material 110 is adhesively fixed to the floor 200 and the outer wall 300 of the building via the adhesive surface 130, the core material 110 adhesively fixed to the top surface covering material 120 can be prevented from falling toward the lower floor from the state where it is installed in the gap G between the floor 200 and the outer wall 300 of the building.

As described above, in the fireproof interlayer material 100 of the present embodiment, the core material 110 has a density of about 150 kg/m3 or more than 150 kg/m2, and the lamination direction in which the core material 111 has excellent elasticity is the same as the floor 200 of the building. Because it is formed toward the direction between the floor 200 and the exterior wall 300, when inserting the core material 110 into the gap G between the floor 200 and the exterior wall 300, it is easier to insert the core material 110 between the floor 200 and the exterior wall 300 than with conventional fireproof interlayer materials. The gap can be compressed in the G direction.

In addition, since the fiber direction of the core material 111, which has excellent strength characteristics, is formed toward the insertion direction between the floor 200 and the outer wall 300 of the building, the core material 111 is formed in the gap G between the floor 200 and the outer wall 300. When inserting the material 110, it is possible to prevent the refractory interlayer material 100 from being deformed in the insertion direction. Thereby, the fireproof interlayer material 100 can be easily installed in the gap G between the floor 200 and the outer wall 300, and fireproof performance can be ensured.

Furthermore, since the core material 110 inserted into the gap G between the floor 200 and the outer wall 300 is formed with a density of 150 kg/cubic meter or more, the fire-resistant interlayer material 100 with sufficient fire-resistant performance is used for the flooring. The gap G between 200 and the outer wall 300 can be filled. Thereby, the fire protection performance of the fire protection structure can be improved.

FIG. 2 is a perspective view showing an example of a part of the process for forming the core material.
As shown in FIG. 2, rock wool R is formed into a plate shape to form the core material 111, and the core material 111 is formed by cutting the rock wool formed into the plate shape into square bar shapes. be done.

Generally, rock wool products are formed through the following steps: melting, fiberizing, gathering, and shaping.
In the melting process, natural rocks such as blast furnace slag and basalt, which are byproducts of steelmaking, are melted in a hot metal furnace or electric furnace. Next, in the fibrillation step, the melted material dissolved in the dissolution step is blown away by centrifugal force using a high-speed rotating device to form fibers.

Next, in the cotton collection process, the fibers blown away during the fibrillation process are collected using a collection net or the like. Next, in the forming process, a fixing agent such as a thermosetting resin called a binder is added to the fibers collected in the cotton collecting process, and the resulting material is processed into a plate shape, resulting in Rockwool R shown in FIG.

In this way, in Rock Wool R, the fibers are stacked in the thickness direction by collecting the fibers blown away in the fiberizing process until they reach a predetermined thickness in the collecting process.
However, in the rock wool collection process, the thickness of rock wool cannot be increased by repeating the layering of fibers. The more fibers overlap, the heavier the fibers will be, and the fibers in the lower layers will be crushed. Therefore, in order to mold plate-shaped rock wool with uniform density, it is preferable to keep the maximum thickness of the plate-shaped rock wool R to about 80 mm.

The core material 111 is formed by cutting rock wool R formed into a plate shape into square bar shapes with a predetermined width. The core material 111 cut into a rectangular bar shape is rotated so that the stacking direction with excellent elasticity is oriented toward the direction between the floor 200 and the outer wall 300, and the outer covering material 112 is rotated so that the fiber direction is oriented vertically. The core material 111 is covered with.

FIG. 3 is a sectional view showing a state in which the fireproof interlayer material according to the first embodiment is installed in the gap formed between the floor and the outer wall.
As shown in FIG. 3, a fireproof interlayer material 100 is inserted and fixed into a gap G formed between a floor 200 and an outer wall 300.

In the refractory interlayer material 100, the core material 110 is inserted from above the gap G with the two extensions 121 provided on the top covering material 120 bent upward. At this time, since the width dimension W of the core material 110 is set to be the same as the gap G or larger than the gap G, the core material 110 is compressed in the horizontal direction, which is the width dimension W direction, from the top to the bottom of the gap G. Press fit into.

At this time, the core material 111 has excellent elasticity in the direction between the floor 200 and the outer wall 300 because the stacking direction is oriented in the direction between the floor 200 and the outer wall 300. Thereby, the width dimension W of the core material 110, which is set to be the same as the gap G or larger than the gap G, can be compressed in the direction between the floor 200 and the outer wall 300, thereby making it possible to shrink the width dimension W. In this state, the core material 110 is press-fitted into the gap G from above.

When the core material 110 is inserted into the gap G to a desired fixed position, the pressure applied to the core material 110 by the core material 111 in the stacking direction is loosened and released. As a result, the core material 111, which had been compressed in the stacking direction, is restored to its original width dimension W. Due to this restoring force, the core material 110 is firmly fixed at a desired position within the gap G.

After that, one extension part 121 of the top covering material 120 is placed along the side surface of the floor 200 and the other extension part 121 is placed along the side surface of the outer wall 300, and the extension part 121 is attached through the adhesive surface 130 exposed by peeling off the release paper 140. is adhered to the floor 200 and the outer wall 300.

Thereby, the fireproof interlayer material 100 is filled in the gap G formed between the floor 200 and the outer wall 300, and can close the gap G. Further, since the upper covering material 120 to which the core material 110 is adhesively fixed is adhesively fixed to the floor 200 and the outer wall 300 via the adhesive surface 130, the core material 110 does not fall from the gap G.

FIG. 4 is a cross-sectional view showing a state in which the fireproof interlayer material according to the first embodiment is supported and installed in the gap formed between the floor and the outer wall with support metal fittings.
As shown in FIG. 4, a fireproof interlayer material 100 and a support fitting 400 are inserted and fixed into a gap G formed between a floor 200 and an outer wall 300.

In FIG. 3, only the refractory interlayer material 100 is inserted into the gap G formed between the floor 200 and the outer wall 300, but the refractory interlayer material 100 inserted into the gap G may be further supported by the support fittings 400. can. As a result, even if the width of the gap G changes when the building shakes due to wind, for example, the support fitting 400 can prevent the fireproof interlayer material 100 from falling.

The support metal fitting 400 is made by bending a flat plate material such as a metal plate, and is bent at right angles so as to cover the upper surface and end of the floor 200, and supports the support metal fitting 400 by facing the upper surface of the floor 200. an upper support part 410 that extends vertically downward from the upper support part 410 along the side surface of the floor 200 and faces the side surface of the floor 200 to the bottom of the floor 200; 300 and a support portion 430 that is bent and extended toward the top, and has a ``re'' shape in cross section.

The dimension from the extension part 420 of the support fitting 400 to the tip of the support part 430 is set larger than the gap G. Thereby, by press-fitting the support fitting 400 from the upper part of the gap G, pressure is applied to the side surface of the floor 200 by the extension part 420, and the stability of the support fitting 400 within the gap G is improved.

Further, the support fitting 400 is press-fitted into the gap G until the upper support part 410 faces the upper surface of the floor 200, and the upper support part 410 faces the upper surface of the floor 200, and the attachment part 420 faces the side surface of the floor 200. By doing so, the support fitting 400 is firmly fixed within the gap G. Further, a plurality of supporting metal fittings 400 are installed at predetermined intervals in the longitudinal direction of the gap G.

Since the fireproof interlayer material 100 is inserted onto the support fittings 400 fixed at a predetermined interval in the longitudinal direction of the gap G, the fireproof interlayer material 100 can be prevented from falling by the plurality of support fittings 400. .

In the refractory interlayer material 100, the core material 110 is inserted from above the gap G with the two extensions 121 provided on the top covering material 120 bent upward. At this time, the width W of the core material 110 is set to be the same as the gap G or larger than the gap G, so the core material 110 is press-fitted from the top of the gap G while being compressed in the horizontal direction, which is the width W direction. .

At this time, the core material 111 has excellent elasticity in the direction between the floor 200 and the outer wall 300 because the stacking direction is oriented in the direction between the floor 200 and the outer wall 300. Thereby, the width dimension W of the core material 110, which is set to be the same as the gap G or larger than the gap G, can be compressed in the direction between the floor 200 and the outer wall 300, thereby making it possible to shrink the width dimension W. In this state, the core material 110 is press-fitted into the gap G from above.

When the core material 110 is inserted into the gap G to a desired fixed position, the pressure applied to the core material 110 by the core material 111 in the stacking direction is loosened and released. As a result, the core material 111, which had been compressed in the stacking direction, is restored to its original width dimension W. This restoring force firmly fixes the core material 110 at a desired position within the gap G.

After that, one extension part 121 of the upper surface covering material 120 is placed along the upper surface of the floor 200, and the other extension part 121 is placed along the side surface of the outer wall 300, and the extension part 121 is attached through the adhesive surface 130 exposed by peeling off the release paper 140. is adhered to the floor 200 and the outer wall 300.

Thereby, the fireproof interlayer material 100 is filled in the gap G formed between the floor 200 and the outer wall 300, and can close the gap G. Further, since the upper covering material 120 to which the core material 110 is adhesively fixed is adhesively fixed to the floor 200 and the outer wall 300 via the adhesive surface 130, the core material 110 does not fall from the gap G. Furthermore, since the fireproof interlayer material 100 is supported from below the core material 110 by the plurality of supporting metal fittings 400, it is possible to more firmly prevent the core material 110 from falling.

[Second embodiment]
Next, a second embodiment of the present invention will be described. The refractory interlayer material 100 of this embodiment has substantially the same structure as that shown in the first embodiment, except that the core material 110 is composed of a plurality of core materials 111. Therefore, components that are substantially the same as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 5 is a cross-sectional view showing details of the fireproof interlayer material in the second embodiment.
As shown in FIG. 5, the fireproof interlayer material 100 includes a core material 110, a top covering material 120, an adhesive surface 130, and a release paper 140.

The core material 110 is for filling the gap G formed between the floor 200 and the outer wall 300 (not shown here), and is a core material that is divided into three parts. It includes a core material 111 and an outer covering material 112 provided so as to completely cover the circumferential surface of the inner core material 111. In this embodiment, a case will be described in which a gap G of about 150 mm formed between a floor 200 and an outer wall 300 (not shown) is filled with the fireproof interlayer material 100.

The core material 111 is filled in a gap G formed between the floor 200 and the outer wall 300 (not shown here) and is made of a material having sufficient fire resistance. A specific example of the material is rock wool having a density of about 150 kg/m3 or more than 150 kg/m3. In addition to rock wool, it can also be formed using inorganic fibers such as ceramic fibers and glass wool.

As mentioned above, the thickness in the stacking direction of the rock wool fibers that are shaped into a plate increases as the fibers overlap, and the fibers in the lower layer are crushed, resulting in a large pressure and density. It is difficult to form rock wool into a uniform plate shape.

For this reason, when filling a small gap G such as about 50 mm between the floor 200 and the outer wall 300 with the fireproof interlayer material 100, as in the case of the fireproof interlayer material 100 in the first embodiment, However, when the gap G formed between the floor 200 and the outer wall 300 is as large as about 150 mm as in this embodiment, the following problem occurs.

First, when inserting plate-shaped rock wool with a uniform density with the stacking direction facing the direction between the floor 200 and the outer wall 300, it is possible to form a plate-shaped rock wool with a uniform density and a thickness of about 150 mm. Due to the difficulty, it is not possible to close the gap G of about 150 mm formed between the floor 200 and the outer wall 300.

Even if plate-shaped rock wool is molded to a thickness of 150 mm or more in order to close the gap G of about 150 mm formed between the floor 200 and the outer wall 300, the density of the rock wool will not be uniform. This causes a difference in the density of the rock wool filled between the layers. In other words, it is not possible to fill all the interlayers with rock wool with improved density, and therefore the fire protection performance of the fire protection structure cannot be improved.

Therefore, in the fireproof interlayer material 100 of the present embodiment, a plurality of rock wools having uniform density and formed into plate shapes are combined in the stacking direction, so that the approximately 150 mm area formed between the floor 200 and the outer wall 300 is Gap G can be closed.

Specifically, the core material 110 includes a core material 111A molded with a width dimension of Wa, a core material 111B molded with a width dimension of Wb, and a core material 111C molded with a width dimension of Wc. There is.

The width dimension W of the core material 111A, the core material 111B, and the core material 111C is larger than the gap G between the floor 200 and the outer wall 300 of the building. Specifically, for a gap G of about 150 mm formed between the floor 200 and the outer wall 300 (not shown here), the width dimension W is preferably formed to be about 155 mm to 165 mm.

More specifically, if the width dimension Wa of the core material 111A, the width dimension Wb of the core material 111B, and the width dimension Wc of the core material 111C are each 55 mm, which can be formed to have a uniform density, then the total width dimension W is 165 mm, which can sufficiently close the gap G of about 150 mm formed between the floor 200 and the outer wall 300.

Note that if the width dimension Wa of the core material 111A, the width dimension Wb of the core material 111B, and the width dimension Wc of the core material 111C can be molded with uniform density, a plurality of molded core materials each having a different width dimension can be formed. The gap G between the floor 200 and the outer wall 300 can also be closed by combining the core material 111.

FIG. 6 is a sectional view showing a fireproof structure in which a fireproof interlayer material, a support fitting, and a metal plate according to the second embodiment are installed in a gap G formed between a floor and an outer wall.
As shown in FIG. 6, the fireproof interlayer material 100 is inserted and fixed into the gap G formed between the floor 200 and the outer wall 300, and the fireproof interlayer material 100 and the metal plate material 500 are supported by the support fittings 400. There is.

The support metal fitting 400 is made by bending a flat plate material such as a metal plate, and is bent at right angles so as to cover the upper surface and end of the floor 200, and supports the support metal fitting 400 by facing the upper surface of the floor 200. an upper support part 410 that extends vertically downward from the upper support part 410 along the side surface of the floor 200 and faces the side surface of the floor 200 to the bottom of the floor 200; 300 and a support portion 430 that is bent and extended toward the top, and has a ``re'' shape in cross section.

Further, the support fitting 400 is provided with a plate support part 440 for supporting the metal plate 500 on the attachment part 420. The plate support part 440 is, for example, a protrusion in the shape of cutting and raising a part of the attachment part 420, and the plate support part 440 supports the floor 200 side portion of the metal plate material 500, and the outer wall 300 side of the metal plate material 500. is supported by the outer wall 300. In addition, the plate support portion 440 may be a protrusion attached to the surface of the extension portion 420 on the outer wall 300 side by welding or the like.

In addition, the plate support section 440 can also be provided on the support section 430. For example, the plate support part 440 is a protrusion formed by cutting and raising a part of the tip of the support part 430, and the plate support part 440 formed at the tip of the support part 430 allows the outer wall 300 side of the metal plate 500 to be raised. The floor 200 side portion of the metal plate 500 is supported by a part of the support portion 420 above the tip of the support portion 430 .

Further, the plate support section 440 can also be provided at the lower end of the extension section 420. For example, the plate support portion 440 is a corner portion formed by bending the lower end portion of the extension portion 420 at an acute angle toward the top of the outer wall 300; The floor 200 side portion of the metal plate 500 is supported by the outer wall 300, and the outer wall 300 side of the metal plate 500 is supported by the outer wall 300.

The metal plate material 500 is supported by a plurality of supporting metal fittings 400 installed at predetermined intervals in the longitudinal direction of the gap G. The metal plate material 500 is a plate material with a thickness of 1.6 mm or more that closes the gap G along the longitudinal direction.

By installing this metal plate material 500 in the gap G, the gap G is closed and supported by the support fittings 400, so that it is possible to prevent the spread of fire between the upper and lower floors. Further, since the fireproof interlayer material 100 is installed above the gap G closed by the metal plate material 500, it is possible to more firmly prevent the core material 110 from falling.

The core material 110 is an interlayer material for filling the gap G formed between the floor 200 and the outer wall 300, and includes three core materials 111, and the peripheral surface of the three core materials 111. An outer covering material 112 is provided so as to completely cover the.

For example, the three core materials 111 are heat insulating materials in which rock wool is laminated at a density of about 150 kg/cubic meter or more than 150 kg/cubic meter, and is fixed into a rectangular bar shape by adding a fixing agent such as a thermosetting resin.

Further, the stacking direction of the core material 111A, the core material 111B, and the core material 111C are inserted toward the direction between the floor 200 and the outer wall 300. As a result, the gap G of approximately 150 mm formed between the floor 200 and the outer wall 300 can be closed with the high-density, high-hardness fireproof interlayer material 100 that has high heat insulation properties and hardness.

As described above, in the fireproof interlayer material 100 of the present embodiment, the core material 110 has a density of about 150 kg/m3 or more than 150 kg/m3, and the lamination direction in which the three core materials 111 have excellent elasticity is the floor of the building. 200 and the outer wall 300, when inserting the core material 110 into the gap G between the floor 200 and the outer wall 300, it is easier to insert the core material 110 between the floor 200 and the outer wall 300 than with conventional fireproof interlayer materials. The gap can be compressed in the G direction.

In addition, since the fiber direction of the three core materials 111 with excellent strength characteristics is formed toward the insertion direction between the floor 200 and the outer wall 300 of the building, the gap G between the floor 200 and the outer wall 300 is When inserting the core material 110 into the refractory interlayer material 100, it is possible to prevent the refractory interlayer material 100 from being deformed in the insertion direction. Thereby, the fireproof interlayer material 100 can be easily installed in the gap G between the floor 200 and the outer wall 300, and fireproof performance can be ensured.

Furthermore, since the core material 110 inserted into the gap G between the floor 200 and the outer wall 300 is formed with a density of 150 kg/cubic meter or more, the fire-resistant interlayer material 100 with sufficient fire-resistant performance is used for the flooring. The gap G between 200 and the outer wall 300 can be filled. Thereby, the fire protection performance of the fire protection structure can be improved.

In addition, in the fireproof interlayer material 100 of the present embodiment, an example has been described in which the stacking direction of the three core materials 111 is formed toward the direction between the floor 200 and the outer wall 300 of the building. It is sufficient that the stacking direction of at least one of the plurality of core materials 111 is directed toward the direction between the floor 200 and the outer wall 300 of the building in accordance with the width of the core material 111, and any core material may be used. It is also possible to orient the stacking direction of the core material 111 in the direction between the floor 200 and the outer wall 300 of the building, and to orient the fiber direction of the other core material 111 in the direction between the floor 200 and the outer wall 300 of the building.

100 Fireproof interlayer material 110 Core material 111 Core material 112 Outer covering material 120 Top covering material 121 Extension portion 130 Adhesive surface 140 Release paper 200 Floor 300 External wall 400 Support fitting 410 Upper support portion 420 Addition portion 430 Support portion 440 Board material support portion 500 Metal plate material G Gap R Rock wool W Width dimension

Claims (9)

In the fire-resistant interlayer material placed in the gap formed between the floor and the exterior wall of a building,
a core material made of a noncombustible material in which the stacking direction of inorganic fibers is oriented in the direction between the floor and the outer wall, and inserted along the longitudinal direction of the gap;
A fire-resistant interlayer material characterized by comprising: The core material is
a divided core material divided into a plurality of pieces in the direction between the floor and the outer wall;
The refractory interlayer material according to claim 1, comprising: The split core material is
the lamination direction of at least one core material is oriented in a direction between the floor and the outer wall;
The refractory interlayer material according to claim 2, characterized by: The noncombustible material is
The gap is filled with a packing density of 150 kg/m3 or more;
The fireproof interlayer material according to claim 1, characterized by: an outer covering material that covers the peripheral surface of the core material;
The refractory interlayer material according to claim 1, comprising: The inorganic fiber is
Being rock wool,
The fireproof interlayer material according to claim 1, characterized by: a top surface covering material that covers at least the entire upper surface of the core material in a state where the core material is arranged in the gap, and has at least waterproofness and resistance to welding sparks;
The refractory interlayer material according to claim 1, comprising: In a fireproof structure that has a fireproof interlayer material in the gap formed between the floor and the outer wall of a building,
The fireproof interlayer material is
a core material made of a noncombustible material in which the stacking direction of inorganic fibers is oriented in the direction between the floor and the outer wall, and inserted along the longitudinal direction of the gap;
A fireproof structure characterized by comprising: In a construction method for a fireproof structure that has a fireproof interlayer material in the gap formed between the floor and the exterior wall of a building,
The fireproof interlayer material is made of a noncombustible material in which the lamination direction of inorganic fibers is oriented in the direction between the floor and the outer wall, and the core material inserted along the longitudinal direction of the gap is the laminated layer of the inorganic fibers. a step of being compressed in the direction;
inserting the fireproof interlayer material compressed in the lamination direction of the inorganic fibers into the gap;
a step of loosening and releasing the pressure compressed in the stacking direction of the inorganic fibers;
A construction method for a fireproof structure characterized by comprising: