JP2023174623A - Exterior wall panel and structure of exterior wall using the same, and exterior wall panel construction method - Google Patents

Abstract

To provide an exterior wall panel, which can ensure sufficient fire-preventive and fire-resistant performance and water tightness by a simple structure on a vertical joint of the exterior wall panels disposed in a horizontal direction of an exterior wall of an architectural structure and has excellent workability, a structure of the exterior wall using the same, and a construction method of the exterior wall panel.SOLUTION: An external wall structure is configured by disposing and connecting a plurality of exterior wall panels, which have a panel body having fire-resistant performance and a sealing member made of fire-retardant rubber that is disposed on a side end part of the panel body so as to seal a vertical joint formed between two pieces of the exterior wall panels adjacent to each other, in a horizontal direction around an architectural structure. A nonflammable heat insulation material is disposed on the vertical joint formed between the two pieces of the external wall panels.SELECTED DRAWING: Figure 13

Description

The present invention relates to an exterior wall panel constituting the exterior wall of a building, an exterior wall structure using the same, and a construction method for the exterior wall panel.

In an exterior wall constructed by connecting a plurality of exterior wall panels that have fireproofing and fireproofing properties, the joints between the exterior wall panels must also have fireproofing and fireproofing properties. Watertightness is also required at the joints between exterior wall panels. It is also necessary to ensure workability at the joints between external wall panels.

In response to these demands, for example, Patent Document 1 discloses a joint fireproof structure for vertical joints formed between horizontally adjacent exterior wall panels. Specifically, in the technology described in Patent Document 1, when the exterior wall panels are arranged horizontally, that is, when a plurality of exterior wall panels extending horizontally are arranged in the vertical direction, It uses a fixed exterior wall panel unit. The outer wall of the building is constructed by arranging and connecting a plurality of these outer wall panel units. A sealing member is interposed in the vertical joint formed between the external wall panels of horizontally adjacent external wall panel units, and a sealing member is provided on the indoor side so as to straddle the external wall panel units on both sides of the vertical joint. Insulation is installed. This noncombustible insulation material is installed across the entire width between the vertical edges that support the exterior wall panels of the exterior wall panel units on both sides of the vertical joint, and is held down and fixed by the insulation material holding member provided on the vertical edges. has been done. In this way, watertightness of the vertical joints is ensured by the sealing member, and fireproof performance of the vertical joints is ensured by the noncombustible heat insulating material. In addition, since the non-combustible heat insulating material can be installed from the indoor side between the vertical edges of the exterior wall panel units on both sides of the vertical joint, construction without scaffolding is possible.

Patent No. 6511252 Patent No. 6414857

Building Materials Testing Center, General Incorporated Foundation, “Fireproof Performance Testing and Evaluation Business Methods”, July 2021, p. 14

However, in the joint fireproof structure for the vertical joints of exterior wall panels disclosed in Patent Document 1, the noncombustible heat insulating material that is attached so as to straddle the vertical joints is provided on the vertical rim that supports the exterior wall panels of the exterior wall panel unit. It is pressed and fixed by a heat insulating material pressing member. Since this vertical rim extends in the height direction of the building, the joint fireproof structure for vertical joints of an exterior wall panel disclosed in Patent Document 1 cannot be applied to horizontal joints extending in the horizontal direction. Patent Document 1 describes that in each exterior wall panel unit, the exterior wall panels are arranged vertically, that is, a plurality of exterior wall panels extending in the vertical direction are arranged horizontally, and are fixed to the horizontal rim. There are no examples listed. As disclosed in Patent Document 1, when external wall panels are installed horizontally, there are many horizontal joints where rainwater and dust tend to accumulate, so waterproof performance is generally lower than when external wall panels are installed vertically. It has poor durability and is prone to staining the exterior walls.

Furthermore, in the technology disclosed in Patent Document 1, the noncombustible heat insulating material is fixed so as to straddle the vertical joints using the vertical rim that supports the external wall panel of the external wall panel unit. , it is necessary to arrange vertical edges on both sides of the vertical joint, and it is also necessary to increase the number of vertical edges.

The present invention was made in order to solve the above problems, and it is possible to improve fireproof performance and watertightness with a simple structure at the vertical joints of exterior wall panels arranged horizontally on the exterior wall of a building. It is an object of the present invention to provide an exterior wall panel that can be secured sufficiently and has excellent workability, an exterior wall structure using the same, and a method for constructing the exterior wall panel.

The means for solving the above problems are as follows.
[1] An exterior wall panel that constitutes the exterior wall of the building by being arranged horizontally around the building and connecting them, comprising a panel main body having fire resistance, and two panels adjacent to each other. A sealing member made of flame-retardant rubber is provided at the side end of the panel body so as to seal the vertical joint formed between the outer wall panels; An exterior wall panel comprising: a fireproof covering material that is foamable at temperature and provided at a location closer to the outdoors than a sealing member.
[2] The outer wall according to [1], wherein the side end portions of the panel main body are formed in an uneven shape so as to engage with each other when the two adjacent outer wall panels are connected. panel.
[3] The side end portion of the panel body is provided with a groove portion into which the sealing member of the panel body of the other adjacent outer wall panel engages. exterior wall panels.
[4] The fireproof covering material according to any one of [1] to [3], wherein the fireproof covering material is provided in a region that is inside the vertical joint formed between the other adjacent external wall panels. Exterior wall panel.
[5] The exterior wall panel according to any one of [1] to [4], wherein the fireproof coating material is composed of a fireproof paint or a fireproof sheet.
[6] The outdoor side of the panel body extends to the outdoor side of the vertical joint so as to hide the vertical joint formed when connected to another external wall panel. The exterior wall panel according to any one of [1] to [5].
[7] Any one of [1] to [6], wherein the outer wall panel is formed in a long shape in which a dimension in a direction along the side edge portion is larger than a dimension in a direction perpendicular to the side edge portion. Exterior wall panel described in Crab.
[8] The panel body is configured to include a steel plate that constitutes the outdoor side of the panel body, and a noncombustible heat insulating material provided on the indoor side of the steel plate, [1] to [ 7].
[9] An exterior wall structure constructed by connecting a plurality of exterior wall panels according to any one of [1] to [8] in a horizontal direction around a building, wherein the exterior wall panels are vertically arranged. An external wall structure that is fixed to the horizontal rim of the building.
[10] The outer wall structure according to [9], wherein the outer wall panel is fixed to the horizontal edge of the building from the indoor side of the building with blind fasteners.

Here, a blind fastener refers to a fastener in which the tip of the fastener spreads laterally on the back side of the fastened part by working only from the front side of the fastened part, thereby fastening the fastened part. . Specifically, with the blind fastener inserted into the hole provided in the fastened member, the core rod connected to the fastener tip is pulled out, or a screw is inserted into the screw hole provided in the fastener tip. As a result, the tip of the fastener deforms in such a way that it is pulled toward you. As a result, the fastener tip expands laterally and engages with the back side of the member to be fastened, and the member to be fastened is fastened. Specific examples of blind fasteners include lock rivets, blind rivets, valve-tight rivets, clips such as push button clips, pop nuts, jack nuts, well nuts, screw grommets, and the like.
[11] A plurality of the exterior wall panels are connected in the height direction of the building so as to sandwich joint drainage plates, and the lower end surface of the exterior wall panel above the joint drainage plate and the lower end surface of the exterior wall panel below the joint drainage plate are The outer wall structure according to [9] or [10], wherein the upper end surface of the outer wall panel is in close contact with the joint draining plate.
[12] The method for constructing an exterior wall panel according to any one of [1] to [8], comprising:
A method of constructing an exterior wall panel, comprising fixing the panel main body of the exterior wall panel to the lateral edge of the building from the indoor side of the building using blind fasteners.

According to the exterior wall panel, the structure of the exterior wall using the same, and the construction method of the exterior wall panel of the present invention, it is possible to prevent the vertical joints of a plurality of exterior wall panels arranged horizontally in the exterior wall of a building with a simple structure. Sufficient fire resistance and watertightness can be ensured, as well as excellent workability.

FIGS. 1(a) to 1(c) are a horizontal sectional view, a front view, and a vertical sectional view showing an outer wall constructed using an outer wall panel according to a first embodiment of the present invention. FIG. 2 is a horizontal sectional view showing an enlarged side end portion of the panel body of the outer wall panel according to the first embodiment of the present invention. FIG. 3 is an enlarged horizontal cross-sectional view showing a connecting portion between outer wall panels according to the first embodiment of the present invention. FIG. 4 shows a state in which the connecting portions of the outer wall panels according to the first embodiment of the present invention are heated during a fire. FIG. 5 shows a modified example of the first embodiment of the present invention in which the connecting portions of the outer wall panels are heated during a fire. FIG. 6 shows an exterior wall constructed by connecting a plurality of exterior wall panels in the height direction of a building according to the first embodiment of the present invention. FIG. 7 shows another example of an exterior wall constructed by connecting a plurality of exterior wall panels according to the first embodiment of the present invention in the height direction of a building. FIG. 8 is an enlarged horizontal sectional view showing a connecting portion between outer wall panels according to a second embodiment of the present invention. FIG. 9 is an enlarged horizontal sectional view showing a connecting portion between outer wall panels according to a third embodiment of the present invention. FIG. 10 is a horizontal sectional view schematically showing the joint width of vertical joints formed between exterior wall panels of the present invention and the coating thickness of the fire-resistant paint. FIG. 11 is an enlarged horizontal cross-sectional view showing a connecting portion between outer wall panels according to a fourth embodiment of the present invention. FIG. 12 is a horizontal sectional view showing an enlarged side end portion of the panel main body of the external wall panel of the reference example. FIG. 13 is an enlarged horizontal cross-sectional view showing a connecting portion between outer wall panels of a reference example. FIG. 14 is a graph illustrating the effect of the external wall panel of the reference example.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the embodiment of the exterior wall panel of this invention, the structure of the exterior wall using the same, and the construction method of an exterior wall panel will be specifically described.
<First embodiment>
1) Exterior wall panel and structure of exterior wall using the same FIGS. 1(a) to 1(c) are horizontal sectional views and front views of an exterior wall constructed using the exterior wall panel according to the first embodiment of the present invention. Figures and longitudinal cross-sectional views are shown, respectively.

As shown in FIGS. 1(a) to 1(c), a plurality of external wall panels 1A of this embodiment constitute the external wall of a building by being arranged horizontally around the building and connected. It is something to do. The outer wall panel 1A of the present embodiment is formed in a long shape in which the dimension in the direction along the side edge portion is larger than the dimension in the direction perpendicular to the side edge portion. The exterior wall panel 1A is generally manufactured to have a length of 12 m or less, and with this length, it can be easily transported to a construction site without any restrictions on transportation. Therefore, when constructing the outer wall of a one-story or two-story building such as a factory or warehouse using the outer wall panel 1A of this embodiment, a plurality of outer wall panels 1A are connected in the height direction of the building. The entire height of the outer wall can be constructed from one outer wall panel 1A without having to do so.

As shown in FIGS. 1(a) to 1(c), the structure of the exterior wall of this embodiment is constructed by connecting a plurality of exterior wall panels 1A horizontally side by side around the building. Specifically, the exterior wall panel 1A formed in a long shape as described above is vertically stretched along the height direction of the building, and horizontally stretched between the studs 5 provided along the outer periphery of the building. It is fastened from the indoor side with a blind fastener 2 to a horizontal rim 4 constructed on the floor. The horizontal rims 4 provided on the outer periphery of the building are generally provided at intervals of, for example, 2,700 mm or less in the height direction of the building, and with this spacing, the outer wall panel 1A of the building Sufficient fixing strength is ensured. Due to the unique configuration of the outer wall panel 1A of this embodiment, there is no need to reduce the interval between the horizontal edges 4.

Moreover, rising concrete 6 is provided on the ground along the outer periphery of the building, and a draining plate 61 is interposed between the upper end of this rising concrete 6 and the lower end of the outer wall panel 1A. The draining board 61 has a function of draining rainwater that flows down along the outdoor side surface of the outer wall panel 1A to the outdoor side of the rising concrete 6. The lower end of the wall panel 1A is fastened from the indoor side to a drainage board 61 fixed to the standing concrete 6 by blind fasteners 2.

In the structure of the exterior wall of this embodiment, the exterior wall panel 1A formed in a long shape is vertically stretched along the height direction of the building, so there are no horizontal joints where rainwater and dust tend to accumulate. The number of horizontal joints becomes extremely small. Therefore, it is easier to ensure waterproof performance and durability than external wall panels that are installed horizontally, and staining of the external wall is less likely to occur. The vertical joints 1J formed between the exterior wall panels 1A function as pipes and promote drainage of rainwater, preventing rainwater from entering from the outdoor side of the exterior wall to the indoor side. It has better watertightness than an exterior wall made of solid wood.

FIG. 2 shows an enlarged view of the side end portion 10e of the panel body 10 of the outer wall panel 1A of this embodiment. Further, FIG. 3 shows an enlarged view of a state in which the outer wall panels 1A of this embodiment are connected to each other.

As shown in FIG. 2, the outer wall panel 1A includes a panel main body 10 having fire resistance, a sealing member 14 made of flame retardant rubber, and a fire resistant covering material 15 having temperature foamability. ing.

Of these, the panel body 10 includes a steel plate 11 constituting the outdoor side of the panel body 10, a steel plate 12 constituting the indoor side, and the indoor side of the steel plate 11, that is, between the steel plates 11 and 12. The structure includes a noncombustible heat insulating material 13 provided in the.

The panel main body 10 of the exterior wall panel 1A of this embodiment is formed to have a thickness of 75 mm, and the steel plate 11 is a hot-dip zinc-5% aluminum alloy plated steel plate with a plate thickness of 0.5 mm, and the steel plate 12 is made of a steel plate with a plate thickness of 0.5 mm. .5mm hot-dip galvanized steel plate is used. The types and thicknesses of the steel plates 11 and 12 can be changed depending on the specifications required for the outer wall panel 1A. Moreover, in the outer wall panel 1A of this embodiment, as the noncombustible heat insulating material 13, for example, rock wool having a density of 80 kg/m ³ and a thickness of 44 mm is used. The material, density, and thickness of the noncombustible heat insulating material 13 can also be changed depending on the level of fireproof performance required of the outer wall. As shown in FIG. 2, the noncombustible heat insulating material 13 is arranged so as to be in contact with the steel plate 12 that constitutes the indoor side surface of the panel body 10, and the steel plate 11 that constitutes the outdoor side surface of the panel body 10. An air layer with a thickness of 30 mm is formed between and the noncombustible heat insulating material 13. If the thickness of the non-combustible heat insulating material 13 is increased to reduce the thickness of the air layer, or if the entire space between the steel plates 11 and 12 is filled with the non-combustible heat insulating material 13 to eliminate the air layer, the outer wall The fireproof performance of the panel 1A can be further improved.

As described above, the steel plate 12 constituting the indoor side of the panel body 10 is fastened from the indoor side to the horizontal rim 4 of the building or the draining board 61 by the blind fasteners 2. However, if the noncombustible heat insulating material 13 is made of a material that can be directly fastened with the blind fastener 2, the steel plate 12 that forms the indoor side of the panel body 10 may not be provided.

As shown in FIGS. 2 and 3, the side end portion 10e of the panel body 10 is formed into an uneven shape so as to engage with each other when two adjacent outer wall panels 1A are connected. In this way, as shown in FIG. 3, the side edges 10e of the outer wall panel 1A are tightly connected, so the outer wall panel The fireproof performance and watertightness of 1A vertical joint 1J can be further improved.

Further, the sealing member 14 is made of flame-retardant rubber such as chloroprene rubber, and as shown in FIG. , is provided at the side end portion 10e of the panel body 10, and functions as a rain barrier and a wind barrier. The side end portion 10e of the panel body 10 has a groove portion into which the sealing member 14 of the panel body 10 of the other adjacent exterior wall panel 1A engages when the two exterior wall panels 1A adjacent to each other are connected. 10g is provided. In this way, as shown in FIG. 3, when two mutually adjacent external wall panels 1A are connected, the groove 10g provided in the side end 10e of the panel body 10 is connected to the other adjacent external wall panel. The sealing member 14 of the panel main body 10 of 1A is inserted. Therefore, the vertical joints 1J formed between the outer wall panels 1A are sealed, and the watertightness of the vertical joints 1J of the outer wall panels 1A can be further improved.

Further, as shown in FIG. 2, the fireproof covering material 15 is provided at a portion of the surface of the steel plate 11 at the side end portion 10e of the panel body 10 that is closer to the outdoors than the sealing member 14. The fireproof covering material 15 expands due to heating in the event of a fire on the outdoor side, and covers a portion of the vertical joint 1J formed between the two mutually adjacent external wall panels 1A that is closer to the outdoor side than the sealing member 14. It is even more obstructive.

The vertical joint 1J formed between two mutually adjacent exterior wall panels 1A is sealed with a sealing member 14 made of flame-retardant rubber, and the outdoor side and the indoor side are insulated, but the sealing The fireproof performance of the vertical joint 1J is not necessarily sufficient with only the member 14. Therefore, by providing the fireproof covering material 15 as described above, it is possible to effectively block heat transfer from the outdoor side to the indoor side of the vertical joint 1J.

The fireproof covering material 15 needs to be provided at a location closer to the outdoors than the sealing member 14 . If the fireproof covering material 15 is provided indoors rather than the sealing member 14, when the vertical joint 1J receives heat during a fire outdoors, the flame is blocked by the sealing member 14, and the fireproof covering material 15 is difficult to reach the foaming temperature, making it difficult for the fireproof covering material 15 to exhibit its fireproof performance. In the exterior wall panel 1A of this embodiment, the fireproof covering material 15 is spread over a predetermined width in the horizontal direction around the vertical joint 1J, in addition to the area that becomes the inner surface of the vertical joint 1J in the side end 10e of the panel main body 10. It is provided so as to cover the outdoor side surface of the panel main body 10.

FIG. 4 shows a state in which the joints between the outer wall panels 1A of this embodiment are heated during an outdoor fire.

As shown in FIG. 4, the temperature-foamable fireproof covering material 15 expands when exposed to heat during a fire outdoors, and further expands the portion of the vertical joint 1J that is closer to the outdoors than the sealing member 14. Blocks and exhibits fireproof performance.

Further, FIG. 5 shows an outer wall panel 1B in which the installation range of the fireproof covering material 15 of the above-mentioned outer wall panel 1A is changed to only the area that becomes the inner surface of the vertical joint 1J among the side edges 10e of the panel main body 10. It shows the state when the joints between the outer wall panels 1B are heated during an outdoor fire. Even when the fireproof covering material 15 is provided only on the inner surface of the vertical joint 1J of the side end portion 10e of the panel body 10, as in the case of this exterior wall panel 1B, it expands due to heating during an outdoor fire. The interior of the vertical joint 1J is completely closed by the fireproof covering material 15, and fireproofing performance is exhibited.

However, as shown in FIG. 4, the fireproof covering material 15 is applied not only to the inner surface of the vertical joint 1J of the side end 10e of the panel body 10, but also to a predetermined width in the horizontal direction around the vertical joint 1J. It is preferable to provide an extra length so as to cover the outdoor side surface of the panel body 10 over the entire length. In this way, as will be described later, the fireproof performance of the fireproof covering material 15 is fully exhibited, and the durability such as weather resistance of the fireproof covering material 15 itself can also be improved. Note that the greater the density of the rock wool constituting the noncombustible heat insulating material 13, the smaller the extra length of the fireproof covering material 15 can be.

Specifically, the above-mentioned fire-resistant coating material 15 is made of a fire-resistant paint or a fire-resistant sheet that has thermal foamability, and the steel plate 11 at the side end 10e of the panel body 10 is coated with a fire-resistant paint or a fire-resistant sheet is applied. It is provided by pasting. In this way, sufficient fireproof performance can be easily provided in the vertical joint 1J formed between two mutually adjacent exterior wall panels 1A by using a simple structure in which fireproof paint is applied or a fireproof sheet is pasted. I can do it. Even if a fire-resistant paint is applied or a fire-resistant sheet is attached, the fit of the side end portion 10e of the panel body 10 hardly changes. Therefore, watertightness and workability similar to those of a conventional exterior wall panel in which the fireproof covering material 15 is not provided on the side end portion 10e of the panel body 10 can be ensured.

As the fire-resistant paint, "GC fire-resistant paint" manufactured by Glow Chemical Co., Ltd., etc. can be used. "GC fire-resistant paint" starts foaming when the surface temperature reaches approximately 250 degrees Celsius, expands to 10 to 20 times the thickness of the original paint film, forms a heat-insulating layer, and exhibits fire-resistant performance. It is something to do. When using "GC fireproof paint" or a fireproof paint with equivalent performance, the thickness of the fireproof paint 16 should be approximately 1 mm, and the inner surface of the vertical joint 1J and the horizontal direction around the vertical joint 1J should be 60 mm or more and 180 mm. It is preferable to apply the coating to the outdoor side surface of the panel body 10 over the following width. In this way, the fireproof performance of the fireproof paint can be fully exhibited, and the durability such as weather resistance of the fireproof paint itself can also be improved.

In addition, examples of the fireproof sheet include the "flexible fireproof sheet, laminated fireproof sheet" disclosed in Patent Document 2, and the thermally expandable fireproof material "Fiblock" (registered trademark) manufactured by Sekisui Chemical Co., Ltd. etc. can be used. Even when such a fireproof sheet is used, fireproof performance and durability equivalent to those of the above-mentioned fireproof paint can be obtained. Similar to the fire-resistant paint, the fire-resistant sheet is preferably pasted on the inner surface of the vertical joint 1J and on the outdoor surface of the panel body 10 over a width of 60 mm or more and 180 mm or less in the horizontal direction centered on the vertical joint 1J. . In this way, the fireproof performance of the fireproof sheet can be fully exhibited, and the durability such as weather resistance of the fireproof sheet itself can also be improved.

In the fire protection performance test method specified in Non-Patent Document 1, the average temperature rise in the indoor surface temperature is compared to the test condition of heating at a temperature rising from 20°C to 842°C in 30 minutes from the outdoor side. It is required that the temperature be below 140°C, and at most 180°C. As mentioned above, by providing the fireproof covering material 15 on the surface of the side end portion 10e of the panel body 10 at a portion that is closer to the outdoors than the sealing member 14, this required level can be met even in the vertical joint 1J portion. can be fulfilled.

The type, coating thickness or sheet thickness, and extra length of the fire-resistant paint or fire-resistant sheet constituting the fire-resistant coating 15 are preferably changed as appropriate depending on the level of fire-proofing performance required of the outer wall.

Application of the fire-resistant paint or pasting of the fire-resistant sheet constituting the fire-resistant covering material 15 should be done at the factory where the exterior wall panel 1A is manufactured, or at the construction site before the on-site construction method where the exterior wall panel 1A is attached to the building. is preferred. In this way, as will be described later, the outer wall panel 1A can be attached to the building by working from the indoor side of the building, making it possible to perform construction without scaffolding, resulting in excellent workability.
2) Exterior wall panel construction method The exterior wall panel construction method of this embodiment will be described with reference to FIGS. 2 and 3.

The method of constructing the exterior wall panel of this embodiment is realized by fixing the above-mentioned exterior wall panel 1A to the horizontal rim 4 of the building using blind fasteners 2 by working from the indoor side of the building.

As mentioned above, the application of the fire-resistant paint or the attachment of the fire-resistant sheet constituting the fire-resistant coating 15 can be done at the factory that manufactures the exterior wall panel 1A, or from the on-site construction method where the exterior wall panel 1A is attached to the building at the construction site. It is also preferable to do this beforehand. In this way, the outer wall panel 1A can be attached to the building by working from the indoor side of the building, making it possible to perform construction without scaffolding.

When constructing the exterior wall panel 1A configured as described above, a plurality of exterior wall panels 1A are arranged horizontally around the building. As shown in FIGS. 2 and 3, the sealing member 14 provided at the side end 10e of the panel body 10 of one of the two exterior wall panels 1A arranged horizontally is inserted into the other. into the groove 10g provided in the side end 10e of the panel body 10 of the outer wall panel 1A. At the same time, the side of the panel body 10 of the other exterior wall panel 1A is inserted into the groove 10g provided in the side end 10e of the panel body 10 of one of the two exterior wall panels 1A arranged in the horizontal direction. The sealing member 14 provided at the end portion 10e is engaged.

In this state, as shown in FIGS. 1(a) to 1(c), by working from the indoor side of the building, each of the plurality of exterior wall panels 1A is attached to the horizontal edge 4 of the building as a blind. Secure with fastener 2. As described above, in the method for constructing an exterior wall panel of the present embodiment, the exterior wall panel 1A can be attached to the building by working from the indoor side of the building, so construction without scaffolding is possible, and the construction is excellent.
3) Connection of external wall panels in the height direction of the building FIGS. 6 and 7 show the external wall panel 1A of this embodiment when the number of floors of the building is large and one external wall panel 1A is insufficient in length. An example of an external wall constructed by connecting multiple walls in the height direction of a building is shown below. Fig. 6 shows an example in which the external wall panels 1A are connected to each other at approximately the same height as the horizontal rim 4 provided along the external wall of the building, and Fig. 7 shows an example in which the external wall panels 1A are connected to each other at approximately the same height as the horizontal rim 4 provided along the external wall of the building. Examples are shown in which outer wall panels 1A are connected to each other at different heights.

In the example shown in FIG. 6, a joint draining board 3 is attached to the outdoor side of the horizontal rim 4 provided along the outer wall of the building. Further, in the example shown in FIG. 7, an angle rim 71 is attached to a small beam 70 that supports a floor slab 7 of a building, and a joint draining plate 3 is attached to the outdoor side of this angle rim 71.

As shown in FIGS. 6 and 7, the lower end surface and upper end surface of the outer wall panel 1A are formed flat, and the lower end surface of the outer wall panel 1A above the joint draining board 3 and the lower end surface of the joint draining board 3. The upper end surface of the outer wall panel 1A is in close contact with the joint draining plate 3. In this way, the upper and lower outer wall panels 1A of the joint drainage board 3 are arranged so as to sandwich the joint drainage board 3 and to be connected in the height direction of the building. In this state, the lower end of the outer wall panel 1A above the joint draining board 3 and the upper end of the outer wall panel 1A below the joint draining board 3 are fixed to the horizontal furring 4 or the angle furring 71 with the blind fasteners 2. be done. Fixing using the blind fastener 2 can also be carried out from inside the building.

In this way, the joint drainage board 3 is interposed between the vertically arranged exterior wall panels 1A, and the lower and upper end surfaces of the exterior wall panels 1A are placed in close contact with the joint drainage board 3, so that the height of the building can be increased. The connecting portion of the outer wall panel 1A in the direction does not become a weak point in terms of fireproof performance.
<Second embodiment>
FIG. 8 shows a connecting portion of an outer wall panel 1C according to the second embodiment of the present invention.

As shown in FIG. 8, in the outer wall panel 1C of this embodiment, the position where the fireproof covering material 15 is provided is changed from the outer wall panel 1A of the first embodiment. Specifically, in this embodiment, the extra length portion of the fireproof covering material 15 that is provided so as to cover the outdoor side surface of the panel body 10 over a predetermined width in the horizontal direction centering on the vertical joint 1J is It is provided not on the surface of the steel plate 11 at the side end 10e of the main body 10 but on the back surface of the steel plate 11 at the side end 10e of the panel main body 10. The region of the fireproof covering material 15 that becomes the inner surface of the vertical joint 1J is provided on the surface of the steel plate 11 at the side end portion 10e of the panel body 10, similarly to the outer wall panel 1A of the first embodiment. In other respects, the outer wall panel 1C of this embodiment is configured similarly to the outer wall panel 1A of the first embodiment.

In this embodiment, the fireproof covering material 15 is provided on the back surface of the steel plate 11 at the side end portion 10e of the panel body 10, so when the vertical joint 1J receives heat during an outdoor fire, the fireproof covering material 15 is directly Do not come into contact with flame. However, since the thermal conductivity of the steel plate 11 is high and the thickness of the steel plate 11 is as thin as 0.5 mm, the fireproof covering material 15 provided on the back surface of the steel plate 11 reaches the foaming temperature without any problem. As described above, an air layer with a thickness of 30 mm is formed between the steel plate 11 that constitutes the outdoor side surface of the panel body 10 and the noncombustible heat insulating material 13. When the extra length of the fireproof coating 15 reaches the foaming temperature, it expands within this air layer. As a result, the air layer inside the panel body 10 on both sides of the vertical joint 1J is closed, the heat insulation effect is enhanced, and the fireproof performance of the vertical joint 1J is further improved. The thickness of the air layer is appropriately determined in consideration of the expansion rate of the fireproof covering material 15.

In addition, in the exterior wall panel 1C of this embodiment, the fireproof covering material 15 is not exposed on the surface of the steel plate 11 that constitutes the outdoor side surface of the panel body 10, but is hidden on the back side of the steel plate 11, so the exterior wall panel 1C The design of the outdoor side surface of the outer wall constructed by this method is not impaired. Further, since the fireproof covering material 15 is not exposed to the outside air, durability such as weather resistance of the fireproof covering material 15 is also improved.
<Third embodiment>
FIG. 9 shows a connecting portion of an outer wall panel 1D according to a third embodiment of the present invention.

As shown in FIG. 9, in the exterior wall panel 1D of the present embodiment, the inner surface of the vertical joint 1J is The shape of the area has been changed. Thereby, as shown in FIG. 9, the joint width W of the vertical joint 1J formed between two mutually adjacent outer wall panels 1D is smaller than that in the first embodiment. In other respects, the exterior wall panel 1D of this embodiment is configured similarly to the exterior wall panel 1A of the first embodiment.

As in this embodiment, when the joint width W of the vertical joint 1J formed between two mutually adjacent exterior wall panels 1D becomes smaller, the insulation effect between the outdoor side and the indoor side of the vertical joint 1J increases. The fireproofing performance of the vertical joint 1J is further improved.

FIG. 10 schematically shows the joint width W of the vertical joint 1J formed between two mutually adjacent outer wall panels 1D and the thickness T of the fireproof covering material 15.

As mentioned above, the fire-resistant coating material 15 made of fire-resistant paint or fire-resistant sheet starts foaming when the surface temperature reaches approximately 250°C due to a fire, and the thickness becomes 10 to 20 times the thickness of the original paint film. It expands to form a heat insulating layer and exhibits fire resistance. Therefore, it is preferable that the joint width W of the vertical joint 1J is set to a size corresponding to the expansion coefficient of the fireproof covering material 15.

Table 1 shows preferred values of the joint width W (mm) of the vertical joint 1J when the thickness T of the fireproof coating 15 is 1.0 mm, 1.5 mm, and 2.0 mm. As shown in FIG. 10, when the fireproof covering material 15 is provided on both sides of the inner surface of the vertical joint 1J, if the joint width W of the vertical joint 1J is 20 mm, the thickness T of the fireproof covering material 15 is set to 1.0 mm. It is appropriate to Further, when the fireproof coating 15 is provided on one side of the inner surface of the vertical joint 1J, if the joint width W of the vertical joint 1J is 20 mm, it is appropriate that the thickness T of the fireproof coating 15 is 2.0 mm. be.

<Fourth embodiment>
FIG. 11 shows a connecting portion of an outer wall panel 1E according to a fourth embodiment of the present invention.

As shown in FIG. 11, in the exterior wall panel 1E of this embodiment, the steel plate 11 constituting the outdoor side surface of the panel body 10 is connected to the vertical joint formed between two adjacent exterior wall panels 1E. It extends to the outdoor side of vertical joint 1J so as to hide 1J. The fireproof covering material is provided only on the inner surface of the vertical joint 1J that is hidden by the steel plate 11. In other respects, the exterior wall panel 1E of this embodiment is configured almost the same as the exterior wall panel 1A of the first embodiment.

In this embodiment, the fireproof covering material 15 is concealed by the steel plate 11 extending to the outdoor side of the vertical joint 1J, so when the vertical joint 1J is heated during a fire on the outdoor side, the fireproof covering material 15 is Do not come into direct contact with flame. However, since the thermal conductivity of the steel plate 11 is high and the thickness of the steel plate 11 is as thin as 0.5 mm, the fireproof covering material 15 hidden by the steel plate 11 reaches the foaming temperature and expands without any problem. As a result, the inside of the vertical joint 1J is closed by the expanded fireproof covering material 15, the heat insulation effect is enhanced, and the fireproof performance of the vertical joint 1J is further improved.

In addition, in the exterior wall panel 1E of this embodiment, the fireproof covering material 15 is not exposed on the surface of the steel plate 11 constituting the outdoor side surface of the panel body 10, but is hidden on the back side of the steel plate 11, so the exterior wall panel 1E The design of the outdoor side surface of the outer wall constructed by this method is not impaired. Further, since the fireproof covering material 15 is not exposed to the outside air, durability such as weather resistance of the fireproof covering material 15 is also improved.
<Reference example>
An exterior wall panel of a reference example in which the configuration of the exterior wall panel according to the present invention is partially changed, and the structure of an exterior wall using the same will be described below.

FIG. 12 shows an enlarged view of the side end 90e of the panel body 90 of the outer wall panel 9 of this reference example. Further, FIG. 13 shows an enlarged view of a state in which the outer wall panels 9 of this reference example are connected to each other.

As shown in FIGS. 12 and 13, in the exterior wall panel 9 of this reference example, the fireproof covering material 15 of the exterior wall panel 1A of the first embodiment is omitted. As shown in FIG. 13, after the two exterior wall panels 9 adjacent to each other in the horizontal direction are connected, non-combustible heat insulation is installed on the indoor side of the vertical joint 9J formed between these two exterior wall panels 9. A material 95 is fastened with screws 96. In other respects, the exterior wall panel 1C of this embodiment is configured almost the same as the exterior wall panel 1A of the first embodiment.

In this reference example, a fireproof board such as a 9.5 mm thick gypsum board or a 10 mm thick calcium silicate board can be used as the noncombustible heat insulating material 95 fastened to the indoor side of the vertical joint 9J. By setting the width W of the non-combustible heat insulating material 95 to an appropriate size, the fire prevention performance required in the above-mentioned Non-Patent Document 1 can be satisfied.

In the structure of the outer wall of this reference example, the noncombustible heat insulating material 95 can be fastened with the screws 96 from the indoor side of the building. The outer wall panel 9 to which the noncombustible heat insulating material 95 is fastened can also be fixed to the horizontal edge 4 of the building using the blind fasteners 2 by working from the indoor side of the building. Therefore, construction without scaffolding is possible and the construction is excellent.

Further, by using a configuration in which the noncombustible heat insulating material 95 is fastened with screws 96, the fit of the side end portion 90e of the panel body 90 is hardly changed. Therefore, watertightness and workability similar to conventional exterior wall panels can be ensured.

The necessary width W of the noncombustible heat insulating material 95 in this reference example was confirmed through a heating test, and will be described below.

In this heating test, the connection portion between the outer wall panels 9 having the shape shown in FIG. 13 was tested. The thickness of the panel body 90 of the outer wall panel 9 was 75 mm. As the steel plate 91 constituting the outdoor side surface of the panel body 90, a hot dip zinc-5% aluminum alloy plated steel plate with a plate thickness of 0.5 mm is used, and as the steel plate 92 constituting the outdoor side surface of the panel body 90, a plate thickness A 0.5 mm hot-dip galvanized steel plate was used. Further, the entire space formed between the steel plates 91 and 92 of the panel body 90 of the outer wall panel 9 was filled with rock wool as a noncombustible heat insulating material 93. The density of the rock wool constituting the noncombustible heat insulating material 93 was set to two types: 40K (37 to 44 kg/m ³ ) and 80K (73 to 87 kg/m ³ ).

In the case where rock wool with a density of 40K is used as the noncombustible heat insulating material 93 in the panel body 90 of the outer wall panel 9, only one example in which the noncombustible heat insulating material 95 was not provided on the indoor side of the vertical joint 9J was tested. In addition, in the case where rock wool with a density of 80K is used as the noncombustible heat insulating material 93 in the panel body 90 of the outer wall panel 9, there is an example in which the noncombustible heat insulating material 95 is not provided on the indoor side of the vertical joint 9J, and the noncombustible heat insulating material 95 Three examples were tested: one in which a gypsum board with a thickness of 9.5 mm was used as the non-combustible heat insulating material 95, and a calcium silicate board with a thickness of 10 mm as the non-combustible heat insulating material 95.

Then, according to the fire protection performance test method specified in the above-mentioned Non-Patent Document 1, heating conditions were applied to the joints between the exterior wall panels 9 including the vertical joints 9J, from the outdoor side increasing from 20 degrees Celsius to 842 degrees Celsius in 30 minutes. A heating test was conducted.

FIG. 14 shows the distribution of the temperature rise in the indoor surface temperature of the outer wall panel 9 obtained as a result of the main heating test. As shown in FIG. 14, the temperature increase in the outer wall panel 9 decreases as the distance from the center of the vertical joint 9J increases. Furthermore, when comparing the case where rock wool with a density of 40K is used as the non-combustible heat insulating material 93 and the case where rock wool with a density of 80K is used, the temperature rise in the outer wall panel 9 is smaller in the latter case than in the former case. .

As mentioned above, Non-Patent Document 1 requires that the temperature rise in the indoor surface temperature be 140° C. or less on average and 180° C. or less at maximum. On the other hand, as shown in FIG. 14, when rock wool with a density of 40K is used as the noncombustible heat insulating material 93 inside the panel body 90, if the distance from the center of the vertical joint 9J is 90 mm or more, the indoor side The average temperature rise in the surface temperature is below the limit value of 140°C. In other words, if the width W of the noncombustible heat insulating material 95 fastened to the indoor side of the vertical joint 9J is ensured to be 180 mm or more, the fireproof performance specified in Non-Patent Document 1 can be achieved.

In addition, when rock wool with a density of 80K is used as the noncombustible heat insulating material 93 inside the panel body 90, if the distance from the center of the vertical joint 9J is 60 mm or more, the average temperature increase in the indoor surface temperature will decrease. , is below the limit value of 140°C. In other words, if the width W of the noncombustible heat insulating material 95 fastened to the indoor side of the vertical joint 9J is ensured to be 120 mm or more, the fireproof performance specified in Non-Patent Document 1 can be achieved.

In addition, in an example in which a gypsum board with a thickness of 9.5 mm was used as the noncombustible heat insulating material 95 on the indoor side of the vertical joint 9J, and in a test example in which a calcium silicate board with a thickness of 10 mm was used as the noncombustible heat insulating material 95, the vertical joint 9J The temperature rise at the center position was suppressed to 103°C and 109°C, respectively.

1A to 1E Exterior wall panel 1J Vertical joint 10 Panel body 10e Side edge 10g Groove 11, 12 Steel plate 13 Noncombustible heat insulating material 14 Sealing member (flame retardant rubber)
15 Fire-resistant coating materials (fire-resistant paint, fire-resistant sheets)
2 Blind fastener 4 Horizontal rim 5 Stud 6 Standing concrete 61 Drain board 7 Floor slab 70 Small beam 71 Angle rim 9 External wall panel 9J Vertical joint 90 Panel body 90e Side edge 91, 92 Steel plate 93 Noncombustible insulation material 94 Sealing member (flame retardant rubber)
95 Fireproof board 96 Screw T Application thickness of fireproof paint W Joint width of vertical joints

Claims (22)

A panel body with fireproof performance,
a sealing member made of flame-retardant rubber and provided at a side end of the panel body so as to seal a vertical joint formed between two adjacent outer wall panels;
An exterior wall structure constructed by connecting a plurality of exterior wall panels horizontally around a building,
An exterior wall structure in which a noncombustible heat insulating material is provided in a vertical joint formed between the two exterior wall panels. The exterior wall structure according to claim 1, wherein the non-combustible insulation material is gypsum board. The outer wall according to claim 1 or 2, wherein the panel body includes a steel plate that constitutes the outdoor side of the panel body, and a noncombustible heat insulating material provided inside the steel plate. structure. The outer wall according to claim 1 or 2, wherein the side end portions of the panel body are formed in an uneven shape so as to engage with each other when the two adjacent outer wall panels are connected. structure. The outer wall structure according to claim 1 or 2, wherein the side end portion of the panel body is provided with a groove portion into which the sealing member of the panel body of another adjacent outer wall panel engages. Claim 1: The outdoor side of the panel main body extends to the outdoor side of the vertical joint so as to hide the vertical joint formed when connected to another external wall panel. Or the structure of the outer wall described in 2. 3. The outer wall structure according to claim 1, wherein the outer wall panel is formed in an elongated shape such that a dimension in a direction along the side edge is larger than a dimension in a direction perpendicular to the side edge. The exterior wall structure according to claim 1 or 2, wherein the exterior wall panel is stretched vertically and fixed to a horizontal rim of the building. The external wall structure according to claim 1 or 2, wherein the external wall panel is fixed to the horizontal edge of the building from the indoor side of the building with blind fasteners. The plurality of exterior wall panels are connected in the height direction of the building with joint drainage plates in between, and the lower end surface of the exterior wall panel above the joint drainage plate and the outer wall panel below the joint drainage plate are The outer wall structure according to claim 1 or 2, wherein the upper end surface is in close contact with the joint draining plate. An exterior wall panel that constitutes the exterior wall of the building by being connected in a plurality of panels in a horizontal direction around the building,
A panel body with fireproof performance,
a sealing member made of flame-retardant rubber and provided at a side end of the panel body so as to seal a vertical joint formed between two adjacent outer wall panels;
Equipped with
The outer wall panel is an outer wall panel formed in an elongated shape in which a dimension in a direction along the side edge portion is larger than a dimension in a direction perpendicular to the side edge portion. The exterior wall panel according to claim 11, wherein the panel body includes a steel plate that constitutes the outdoor side of the panel body, and a noncombustible heat insulating material provided on the indoor side of the steel plate. . The exterior wall panel according to claim 11 or 12, wherein the side end portions of the panel body are formed in an uneven shape so as to engage with each other when the two adjacent exterior wall panels are connected. . The exterior wall panel according to claim 11 or 12, wherein the side end portion of the panel body is provided with a groove portion into which the sealing member of the panel body of another adjacent exterior wall panel engages. Claim 11: The outdoor side of the panel main body extends to the outdoor side of the vertical joint so as to hide the vertical joint formed when connected to another external wall panel. or the exterior wall panel described in 12. The exterior wall panel according to claim 11 or 12, wherein a fireproof covering material having thermal foamability is provided at a side end portion of the panel body that is closer to the outdoors than the sealing member. The exterior wall panel according to claim 16, wherein the fireproof covering material is provided in a region that is inside the vertical joint formed between the other adjacent exterior wall panels. 17. The exterior wall panel according to claim 16, wherein the fire-resistant coating is comprised of a fire-resistant paint or a fire-resistant sheet. An exterior wall structure constructed by connecting a plurality of exterior wall panels according to claim 11 or 12 horizontally around a building,
An exterior wall structure in which the exterior wall panels are stretched vertically and fixed to the horizontal rim of the building. 20. The exterior wall structure according to claim 19, wherein the exterior wall panel is fixed to the lateral edge of the building from the indoor side of the building with blind fasteners. The plurality of exterior wall panels are connected in the height direction of the building with joint drainage plates in between, and the lower end surface of the exterior wall panel above the joint drainage plate and the outer wall panel below the joint drainage plate are The outer wall structure according to claim 19, wherein the upper end surface is in close contact with the joint draining plate. The method for constructing an exterior wall panel according to claim 11 or 12,
A method of constructing an exterior wall panel, comprising fixing the panel main body of the exterior wall panel to the lateral edge of the building from the indoor side of the building using blind fasteners.

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