Fire-resistant connection structure for sandwich panels

Abstract

To provide a connection structure of a sandwich panel which improves fire resistance of a connection part.SOLUTION: A fireproof connection structure 1 of a sandwich panel includes a substrate material 10, panels P1 and P2 aligned on its outdoor side, a packing 11 sandwiched between the panels P1 and P2, and a fixture 12 which penetrates through the panel P2 and is fixed to the substrate 10. Each of the panels P1 and P2 is a sandwich panel 5 having an outdoor side skin 2 and an indoor side skin 3 which are made of metal, and a core material 4 positioned therebetween. In the indoor side skin 3 of the panel P1, an indoor side covering part 7 covering the packing 11 between the panels P1 and P2 from the indoor side is provided. The indoor side covering part 7 extends to a position overlapping the outermost surface of the indoor side skin 3 of the panel P2. The indoor side covering part 7 is fixed in a state of being sandwiched between the panel P2 and the substrate material 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a fire-resistant connection structure for sandwich panels. [Background technology]

[0002] Patent Document 1 describes a connection structure for architectural panels. The architectural panel is composed of a sandwich panel having a metal front panel, a metal back panel, and a core material disposed between them. A fitting recess is formed at one end of the architectural panel, and a fitting protrusion is formed at the other end. A plate-shaped packing is disposed on the inner surface of the fitting recess. As the plate-shaped packing, rock wool felt or rubber packing mixed with an inorganic expansion material is used.

[0003] The two building panels are attached to the main roof in a state where they are connected to each other by fitting the mating convex portion of one building panel into the mating concave portion of the other building panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-193522 Summary of the Invention [Problem to be solved by the invention]

[0005] In the connection structure for building panels described in Patent Document 1, a joint is formed at the connection between two building panels that is exposed toward the indoor side. Therefore, in the event of a fire on the indoor side, this connection structure may allow flames to penetrate between the two building panels through the joint. To prevent flame penetration, the plate-shaped gasket disposed on the inner surface of the mating recess must be made of a fire-resistant material, such as rock wool felt mixed with an inorganic expansion material. As such, the connection structure for building panels described in Patent Document 1 leaves room for improvement in terms of fire resistance.

[0006] In view of the above circumstances, an object of the present disclosure is to improve the fire resistance of the connection portion in a sandwich panel connection structure. [Means for solving the problem]

[0007] A fire-resistant connection structure for a sandwich panel according to one aspect of the present disclosure includes a base material, a first panel and a second panel arranged on the exterior side of the base material, a gasket sandwiched between the first panel and the second panel, and a fastener penetrating the second panel and securing it to the base material. The first panel and the second panel are sandwich panels each having a metal exterior skin and an indoor skin facing each other, and a core material positioned between the exterior skin and the indoor skin. The indoor skin of the first panel is provided with an indoor-side covering portion that covers the gasket between the first panel and the second panel from the indoor side. The indoor-side covering portion extends to a position overlapping the outermost surface of the indoor-side skin of the second panel. The indoor-side covering portion is fixed in a sandwiched state between the second panel and the base material. [Effects of the Invention]

[0008] According to one aspect of the fire-resistant connection structure for sandwich panels according to the present disclosure, the fire resistance of the connection portion can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic front cross-sectional view showing a fire-resistant connection structure of a sandwich panel according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a front cross-sectional view showing the sandwich panel. [Figure 3] FIG. 3 is a schematic front cross-sectional view showing a fire-resistant connection structure of a sandwich panel according to a second embodiment of the present disclosure. [Figure 4] FIG. 4 is a perspective view showing the sandwich panel. [Figure 5]FIG. 5 is a front cross-sectional view showing the sandwich panel. [Figure 6] FIG. 6A is a front cross-sectional view showing a first modification of the fire-resistant connection structure of the same, and FIG. 6B is a front cross-sectional view showing a second modification of the fire-resistant connection structure of the same. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Embodiment 1) 1. Overview The fireproof connection structure 1 for sandwich panels of embodiment 1 shown in FIG. 1 includes a base material 10, a first panel P1 and a second panel P2 arranged on the outdoor side of the base material 10, a gasket 11 sandwiched between the first panel P1 and the second panel P2, and a fastener 12 that penetrates the second panel P2 and secures it to the base material 10. Each of the first panel P1 and the second panel P2 is a sandwich panel 5 having a metal outdoor-side skin 2 and an indoor-side skin 3 facing each other, and a core material 4 located between the outdoor-side skin 2 and the indoor-side skin 3. The indoor-side skin 3 of the first panel P1 is provided with an indoor-side covering portion 7 that covers the gasket 11 between the first panel P1 and the second panel P2 from the indoor side. The indoor-side covering portion 7 extends to a position overlapping the outermost surface of the indoor-side skin 3 of the second panel P2. The indoor-side covering portion 7 is fixed while being sandwiched between the second panel P2 and the base material 10.

[0011] In the fire-resistant connection structure 1 of this embodiment having the above-described configuration, the indoor-side covering portion 7 of the first panel P1 extends to a position overlapping the outermost surface of the indoor-side outer skin 3 of the second panel P2, so no joint exposed toward the indoor side is formed between the first panel P1 and the second panel P2. Therefore, in the event of a fire on the indoor sides of the panels P1 and P2, the fire-resistant connection structure 1 of this embodiment can prevent flames from penetrating between the panels P1 and P2 through the joint exposed toward the indoor side. Additionally, in the fire-resistant connection structure 1 of this embodiment, the indoor-side covering portion 7 is fixed in a sandwiched state between the base material 10 and the second panel P2. Therefore, in the fire-resistant connection structure 1 of this embodiment, in the event of a fire on the indoor sides of the panels P1 and P2, the indoor-side covering portion 7 is less likely to deform, making it easier to maintain the state in which the packing 11 between the panels P1 and P2 is covered by the indoor-side covering portion 7, and flames are less likely to penetrate between the panels P1 and P2. Therefore, in the fire-resistant connection structure 1 of this embodiment, the penetration of flames into the space between the panels P1 and P2 can be suppressed, and the fire resistance of the connection portion can be improved.

[0012] 2.Details Next, each component of the fire-resistant connection structure 1 of this embodiment shown in Fig. 1 will be described in more detail. The fire-resistant connection structure 1 forms, for example, a roof underlayment, and a roofing material 19 such as a waterproof sheet is placed on top of the fire-resistant connection structure 1. Below, each component of the fire-resistant connection structure 1 will be described in detail, using the fire-resistant connection structure 1 shown in Fig. 1 as a reference, with the direction in which the first panel P1 and the second panel P2 are lined up as the left-right direction, the thickness direction of the first panel P1 and the second panel P2 as the up-down direction, and the direction perpendicular to the left-right direction and the up-down direction (in this embodiment, the eaves-ridge direction of the roof) as the front-rear direction.

[0013] The fire-resistant connection structure 1 includes a base material 10, a first panel P1, a second panel P2, a gasket 11, and a fastener 12, as well as a connecting member 13 that connects the outdoor-side outer skin 2 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2. The fire-resistant connection structure 1 further includes a sealant 14 that is sandwiched between the outdoor-side covering portion 21 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2, and a joint covering member 15 that covers the joint between the outdoor-side outer skin 2 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2 from the outdoor side.

[0014] 2-1. Base material The base material 10 is a member that supports the panels P1 and P2 from the indoor side. The base material 10 is composed of, for example, multiple members 10a that extend in the left-right direction and are positioned at intervals in the front-to-back direction. The panels P1 and P2 are attached in a spanning state to the multiple members.

[0015] Each of the plurality of members 10a is, for example, a purlin. Each of the plurality of members 10a is, for example, formed of a lip channel steel that opens toward the ridge side. The interval between two adjacent members 10a is, for example, 1 to 4 m.

[0016] 2-2. First Panel and Second Panel In the fire-resistant connection structure 1 of this embodiment, the first panel P1 and the second panel P2 are configured as sandwich panels 5 having the same structure.

[0017] As shown in FIG. 2, the sandwich panel 5 has an outdoor skin 2 and an indoor skin 3 made of metal facing each other, and a core material 4 located between the outdoor skin 2 and the indoor skin 3.

[0018] The sandwich panel 5 has a length direction parallel to the front-rear direction, a width direction parallel to the left-right direction, and a thickness direction parallel to the up-down direction.

[0019] The outdoor skin 2 forms the outdoor surface (upper surface) of the sandwich panel 5, and the indoor skin 3 forms the indoor surface (lower surface) of the sandwich panel 5. Each of the outdoor skin 2 and the indoor skin 3 is made of a metal plate. Examples of metal plates that can be used include stainless steel plates, galvanized steel plates, painted steel plates, and Galvalume steel plates (registered trademark). Each of the outdoor skin 2 and the indoor skin 3 is formed by bending processing such as roll forming.

[0020] The core material 4 is filled between the outdoor skin 2 and the indoor skin 3. The core material 4 is made of a heat insulating material or a fire-resistant material. Examples of the core material 4 that can be used include inorganic fiber materials such as rock wool and glass wool, and resin foams such as phenol foam, urethane foam, and isocyanurate foam.

[0021] The exterior skin 2 is provided with an exterior cover portion 21 that covers, from the exterior side, the packing 11 between the exterior skin 2 and other sandwich panels 5 that are arranged side by side.

[0022] In this embodiment, the outdoor-side covering portion 21 is configured as part of the outdoor-side outer skin 2. More specifically, the outdoor-side outer skin 2 has a flat main body portion 20, the outdoor-side covering portion 21 and an edge portion 22 that are continuous with one end in the width direction of the main body portion 20 (the left end in this embodiment), and a recessed step portion 23 and an edge portion 24 that are continuous with the other end in the width direction of the main body portion 20 (the right end in this embodiment).

[0023] The outdoor-side covering portion 21 protrudes outward in the left-right direction (to the left) beyond the indoor-side outer skin 3. The cross-sectional shape of the outdoor-side covering portion 21 is U-shaped, opening to the right. The edge portion 22 is continuous with the outdoor-side covering portion 21, and is located below (on the indoor side) and to the right of the outdoor-side covering portion 21. The cross-sectional shape of the edge portion 22 is L-shaped. The edge portion 22 is located opposite the left edge portion 31 of the indoor-side outer skin 3.

[0024] The recessed step portion 23 is recessed so as to be located lower (toward the indoor side) than the main body portion 20. The cross-sectional shape of the recessed step portion 23 is L-shaped. The length in the left-right direction of the recessed step portion 23 is slightly longer than the length in the left-right direction of the outdoor-side covering portion 21. The length in the up-down direction of the recessed step portion 23 is slightly longer than the length in the up-down direction of the outdoor-side covering portion 21. The edge portion 24 is continuous with the recessed step portion 23, and is folded back to the lower side of the recessed step portion 23 (toward the indoor side).

[0025] The indoor-side outer skin 3 is provided with an indoor-side covering portion 7 that covers, from the indoor side, the packing 11 between the other sandwich panels 5 arranged side by side. The indoor-side covering portion 7 extends to a position where it overlaps with the outermost surface of the indoor-side outer skin 3 of the other sandwich panels 5 (more specifically, the surface of the main body portion 30 (the surface facing the indoor side)).

[0026] In this embodiment, the indoor-side covering portion 7 is configured as part of the indoor-side outer skin 3. More specifically, the indoor-side outer skin 3 has a flat main body 30, an edge portion 31 continuous with one widthwise end (the left end in this embodiment) of the main body 30, and the indoor-side covering portion 7 extending outward in the left-right direction from the other widthwise end (the right end in this embodiment) of the main body 30. The indoor-side covering portion 7 protrudes outward in the left-right direction (to the right) beyond the outdoor-side outer skin 2.

[0027] In this embodiment, the indoor covering portion 7 has an inclined portion 70 that protrudes diagonally from the right end of the main body portion 30 toward the indoor side, a main body 71 that extends outward in the left-right direction from the tip of the inclined portion 70, and a tip portion 72 that protrudes diagonally from the tip of the main body 71 toward the outdoor side.

[0028] The skins 2, 3 are arranged so that the left edge 22 of the outdoor skin 2 faces the left edge 31 of the indoor skin 3, and the right edge 24 of the outdoor skin 2 faces the right end of the main body 30 of the indoor skin 3. The core material 4 is filled between the parts of the skins 2, 3 that face each other in the vertical direction.

[0029] In the sandwich panel 5, the left outdoor covering portion 21 of the outdoor skin 2 protrudes leftward beyond the core material 4 and the indoor skin 3.

[0030] Gaskets 11 are attached over the entire length in the front-to-rear direction (panel length direction) to the left end face of the core material 4, the left edge portion 22 of the outdoor-side skin 2, and the left edge portion 31 of the indoor-side skin 3. The gaskets 11 are made of an organic material.

[0031] A tape-like sealant 16 is attached to the surface facing the upper side (outdoor side) of the main body 71 of the indoor side covering part 7 of the indoor side outer skin 3. The sealant 16 is attached to the main body 71 of the indoor side covering part 7 over the entire length in the front-to-rear direction. Note that the sealant 16, like the packing 11, may be made of an organic material.

[0032] 2-3. Fixtures 1, the fastener 12 is a member that penetrates the second panel P2 and fastens it to the base material 10. The fastener 12 is, for example, a drill screw.

[0033] In this embodiment, the fasteners 12 include fasteners 12a that penetrate the second panel P2 and the indoor covering portion 7 and fix the indoor covering portion 7 to the second panel P2 and the base material 10, and fasteners 12b that penetrate only the second panel P2 and fix the second panel P2 to the base material 10. Note that the fasteners 12b do not penetrate the indoor covering portion 7.

[0034] The fastener 12a is driven into the second panel P2 from the outdoor side. The fastener 12a penetrates the left end of the main body portions 20, 30 of the outer skins 2, 3 of the second panel P2 and the indoor covering portion 7 of the first panel P1 (more specifically, the main body 71 of the indoor covering portion 7), and the tip of the fastener 12a is fixed to the base material 10.

[0035] The fastener 12b is driven into the main body 30 of the second panel P2 from the exterior side, passes through the second panel P2, and the tip of the fastener 12b is fixed to the base material 10.

[0036] 2-4.Connecting members The connecting member 13 is a member that connects the outdoor-side outer skin 2 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2. In this embodiment, the connecting member 13 is a second fastener 13a that penetrates the outdoor-side covering portion 21 of the second panel P2 and secures the outdoor-side covering portion 21 to the outdoor-side outer skin 2 of the first panel P1. The second fastener 13a is, for example, a self-tapping screw. The second fastener 13a penetrates the outdoor-side covering portion 21 of the second panel P2 and the recessed step portion 23 and edge portion 24 of the first panel P1, and the tip of the second fastener 13a fits into the core material 4 of the first panel P1.

[0037] 2-5.Sealant The sealant 14 is sandwiched between the outdoor-side covering portion 21 of the second panel P2 and the outdoor-side outer skin 2 of the first panel P1. More specifically, the sealant 14 is sandwiched between the outdoor-side covering portion 21 of the second panel P2 and the recessed step portion 23 of the first panel P1, which faces the indoor side of the outdoor-side covering portion 21.

[0038] The sealant 14 is provided over the entire length in the front-to-rear direction between the outdoor-side covering portion 21 of the second panel P2 and the recessed step portion 23 of the first panel P1. The sealant 14 is made of the same material as the sealant 16. Note that, like the packing 11, the sealant 14 may be made of an organic material.

[0039] 2-6. Joint covering materials The joint covering member 15 covers the joint between the outdoor-side outer skin 2 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2 from the outdoor side. In other words, the joint covering member 15 is attached so as to extend from the outdoor-side covering portion 21 of the second panel P2 to the outdoor-side outer skin 2 of the first panel P1.

[0040] The joint covering member 15 is an airtight sheet-like member. For example, the joint covering member 15 is an aluminum tape that is fire-resistant in addition to airtightness. The indoor surface of the aluminum tape forms an adhesive surface that can be adhered to the outdoor skin 2 of the panels P1 and P2.

[0041] 2-7.Other The fire-resistant connection structure 1 of this embodiment further includes another fastener 17 for fastening the first panel P1.

[0042] The fastener 17 is a member that penetrates the first panel P1 and fixes the first panel P1 to the base material 10. The fastener 17 is, for example, a drill screw. As the fastener 17, a fastener having the same structure as the fastener 12 can be used.

[0043] The fastener 17 is driven into the main body 20 of the first panel P1 from the exterior side, passes through the first panel P1, and the tip of the fastener 17 is fixed to the base material 10.

[0044] 2-8.Fire-resistant connection structure of sandwich panels In the fire-resistant connection structure 1 of this embodiment, the main body portion 30 and the indoor-side covering portion 7 of the indoor-side outer skin 3 of each of the panels P1 and P2 are in contact with the base material 10.

[0045] The left end of the main body 30 of the second panel P2 overlaps the sealing material 16 on the main body 71 of the indoor-side covering part 7 of the first panel P1. The right side of the core material 4 of the first panel P1 abuts against the gasket 11 on the left side of the core material 4 of the second panel P2. The outdoor-side covering part 21 of the second panel P2 fits into the recessed step 23 of the first panel P1.

[0046] Of the panels P1, P2, fasteners 12a are driven from the outdoor side into the portion where the indoor-side covering portion 7 of the first panel P1 and the second panel P2 overlap in the indoor-outdoor direction, and the panels are fixed to the base material 10. Of the panels P1, P2, fasteners 12b, 17 are driven from the outdoor side into other parts of the main body portions 20, 30 in the width direction (left-right direction), and the panels are fixed to the base material 10. In the fire-resistant connection structure 1 of this embodiment, the indoor-side covering portion 7 of the first panel P1 extends to a position where it overlaps the main body portion 30 (i.e., the outermost surface) of the indoor-side outer skin 3 of the second panel P2, and no joint exposed to the outdoor side is formed at the joint between the panels P1, P2 (at the tip side of the indoor-side covering portion 7).

[0047] A sealant 14 is sandwiched between the outdoor-side covering portion 21 of the second panel P2 and the recessed step portion 23 of the first panel P1. A second fastener 13a is driven into the outdoor-side covering portion 21 of the second panel P2 from the outdoor side, and is fixed to the recessed step portion 23, edge portion 24, and core material 4 of the first panel P1. The tip (indoor-side end) of the second fastener 13a is located within the core material 4 of the first panel P1, and does not penetrate the indoor-side exterior skin 3 of the first panel P1.

[0048] A joint cover member 15 is attached to the exterior skin 2 of the panels P1 and P2 so as to extend from the right end of the main body 20 of the first panel P1 to the left end of the main body 20 of the second panel P2. A roofing material 19 such as a waterproof sheet is applied to the exterior surfaces of the connected panels P1 and P2.

[0049] 3. Effects In the fire-resistant connection structure 1 of this embodiment described above, the indoor-side covering portion 7 of the first panel P1 extends to a position where it overlaps with the outermost surface of the indoor-side outer skin 3 of the second panel P2 (the surface of the main body portion 30 facing the indoor side), so no joint exposed toward the indoor side is formed between the first panel P1 and the second panel P2. Therefore, in the case of a fire breaking out on the indoor sides of the panels P1, P2, the fire-resistant connection structure 1 of this embodiment can prevent flames from penetrating between the panels P1, P2 through the joint exposed toward the indoor side.

[0050] Additionally, in the fireresistant connection structure 1 of this embodiment, the indoor-side covering portion 7 of the first panel P1 is fixed in a sandwiched state between the base material 10 and the second panel P2. Therefore, in the fireresistant connection structure 1 of this embodiment, when a fire breaks out on the indoor sides of the panels P1 and P2, the indoor-side covering portion 7 is less likely to deform, making it easier to maintain the state in which the gasket 11 between the panels P1 and P2 is covered by the indoor-side covering portion 7, and flames are less likely to penetrate between the panels P1 and P2. Therefore, in the fireresistant connection structure 1 of this embodiment, flame penetration between the panels P1 and P2 can be suppressed, thereby improving the fire resistance of the connection portion.

[0051] In addition, in the fire-resistant connection structure 1 of this embodiment, an outdoor-side covering portion 21 that covers the gasket 11 between the panels P1 and P2 from the outdoor side is provided on the second panel P2, and this outdoor-side covering portion 21 is connected to the outdoor-side outer skin 2 of the first panel P1 by a connecting member 13 (second fixing device 13a).

[0052] Therefore, in the fire-resistant connection structure 1 of this embodiment, when a fire breaks out on the indoor side of the panels P1, P2, the outdoor-side covering part 21 can prevent the flames from passing between the panels P1, P2 from the indoor side to the outdoor side. Here, because the outdoor-side covering part 21 is connected to the first panel P1 by the connecting member 13, it is less likely to be deformed by the flames, making it easier to prevent the fire from passing through.

[0053] Furthermore, in the fire-resistant connection structure 1 of this embodiment, the fasteners 12a penetrate the indoor-side covering portion 7 of the second panel P2 and the first panel P1, and fix the indoor-side covering portion 7 to the second panel P2 and the base material 10. Therefore, the fire-resistant connection structure 1 of this embodiment makes it even easier to prevent deformation of the indoor-side covering portion 7 in the event of a fire.

[0054] Furthermore, in the fire-resistant connection structure 1 of this embodiment, the sealing material 16, the packing 11, and the sealing material 14 are sandwiched between the panels P1 and P2, so that flames are less likely to pass between the panels P1 and P2.

[0055] Furthermore, in the fire-resistant connection structure 1 of this embodiment, the fixing device 12a uses a screw with a larger diameter than the second fixing device 13a, which makes it easier to suppress deformation of the indoor covering part 7 in the event of a fire and improves fire resistance.

[0056] Furthermore, in the fire-resistant connection structure 1 of this embodiment, the intrusion of flames into the space between the panels P1, P2 can be effectively prevented by the deformation-resistant indoor covering part 7. Therefore, in the fire-resistant connection structure 1 of this embodiment, there is little need to use a heat-expansion type or other fire-resistant material for the sealants 14, 16 and packing 11 placed between the panels P1, P2, and these can be made of ordinary organic materials that are inexpensive and have excellent airtightness.

[0057] 4. Variations Next, a description will be given of modified examples of the above-described fire-resistant connection structure 1. The following modified examples can be combined as appropriate.

[0058] The fire-resistant connection structure 1 is not limited to being used for a roof foundation, but may also be used for a wall foundation.

[0059] The sandwich panel 5 is not limited to the structure shown in Fig. 2. Of the indoor-side covering portion 7 and the outdoor-side covering portion 21, the sandwich panel 5 may have only the indoor-side covering portion 7.

[0060] Furthermore, the fireproof connection structure 1 does not necessarily have to include the coupling member 13. Furthermore, the fireproof connection structure 1 does not necessarily have to include the sealing materials 14, 16.

[0061] Furthermore, the first panel P1 and the second panel P2 do not have to be composed of sandwich panels 5 having the same structure, and may have different structures.

[0062] Furthermore, the indoor covering portion 7 of the first panel P1 does not have to have the inclined portion 70 and the tip portion 72, and may be formed flush with the main body portion 30.

[0063] Furthermore, the indoor side covering portion 7 does not have to be configured as part of the indoor side exterior skin 3. For example, the indoor side covering portion 7 may be formed of a fire-resistant material such as metal as a separate member from the indoor side exterior skin 3, and may be provided on the indoor side exterior skin 3 by being fixed to the indoor side exterior skin 3 with self-tapping screws or the like.

[0064] Furthermore, the outdoor covering portion 21 does not have to be configured as part of the outdoor outer skin 2. For example, the outdoor covering portion 21 may be formed of a fire-resistant material such as metal as a separate member from the outdoor outer skin 2, and may be provided on the outdoor outer skin 2 by being fixed to the outdoor outer skin 2 with self-tapping screws or the like.

[0065] In addition, the fire-resistant connection structure 1 does not need to be equipped with a fastener 12a, and the indoor covering portion 7 of the first panel P1 may be indirectly fixed by a fastener 12b that fixes only the second panel P2 to the base material 10.

[0066] (Embodiment 2) Next, a description will be given of the fireproof connection structure 1 of embodiment 2 shown in Figures 3 to 5. In the following, the same components of the fireproof connection structure 1 of embodiment 2 as those of the fireproof connection structure 1 of embodiment 1 will be denoted by the same reference numerals in the figures and detailed description will be omitted, and components different from those of the fireproof connection structure 1 of embodiment 1 will be described in detail.

[0067] 1.Details In the fire-resistant connection structure 1 of embodiment 2, the indoor-side outer skin 3 of each of the first panel P1 and the second panel P2 has a plurality of ridges 6 protruding toward the indoor side. The plurality of ridges 6 include end ridges 6a located at the end of the sandwich panel 5. The indoor-side covering portion 7 of the first panel P1 extends so as to overlap the indoor side of the end ridges 6a of the second panel P2, and is fixed in a sandwiched state between the end ridges 6a of the second panel P2 and the base material 10. In this embodiment, the indoor-side covering portion 7 of the first panel P1 is fixed to the end ridges 6a of the second panel P2 and the base material 10 with fasteners 12a passing through.

[0068] More specifically, the indoor side skin 3 is provided with a plurality of parallel protrusions 6 that extend in the front-to-rear direction. Each of the plurality of protrusions 6 protrudes downward (toward the indoor side). Each of the plurality of protrusions 6 is provided over the entire length of the indoor side skin 3 in the longitudinal direction (front-to-rear direction). The plurality of protrusions 6 are positioned at intervals in the width direction (left-to-right direction) of the indoor side skin 3. In this embodiment, the plurality of protrusions 6 are arranged at equal intervals.

[0069] The indoor side exterior skin 3 has a plurality of flat plate portions 32 located between two adjacent protrusions 6 in the width direction (left-right direction). The protrusions 6 and flat plate portions 32 are arranged alternately one by one in the width direction (left-right direction) of the indoor side exterior skin 3. In this embodiment, the indoor side exterior skin 3 has a plurality of protrusions 6 and a plurality of flat plate portions 32 instead of a main body portion 30.

[0070] The multiple protrusions 6 include an end protrusion 6a located at one end of the indoor side exterior skin 3 in the width direction, an end protrusion 6b located at the other end of the indoor side exterior skin 3 in the width direction, and multiple intermediate protrusions 6c located between the end protrusions 6a, 6b.

[0071] Each of the protrusions 6a, 6b, 6c has at least one side plate 60 that protrudes obliquely downward (toward the interior side) from the adjacent flat plate 32, and a tip plate 61 that is continuous with the side plate 60 and is located at the tip of the protrusion direction. The side plate 60 is flat or approximately flat, and the tip plate 61 is also flat. The tip plate 61 is parallel to the flat plate 32.

[0072] In this embodiment, the indoor side outer skin 3 has three intermediate protrusions 6c. Each of the three intermediate protrusions 6c has two side plate portions 60 and one tip plate portion 61. The two side plate portions 60 are arranged such that the distance between the two side plate portions 60 becomes narrower as they are closer to the tip plate portion 61.

[0073] In this embodiment, the end protrusion 6a is located at the left end of the indoor-side outer skin 3. The end protrusion 6a has one tip plate 61 and one side plate 60 located to the right of it. The end protrusion 6a also has an edge 62 that extends obliquely upward (toward the outdoors) from the left end of the tip plate 61. The edge 62 is shorter in the vertical direction than the side plate 60, for example, about one-third the length of the side plate 60. The edge 62 is curved in an arc shape.

[0074] In this embodiment, the end protrusion 6b is located at the right end of the indoor-side outer skin 3. The end protrusion 6b has one tip plate 61 and one side plate 60 located on the left side thereof. The end protrusion 6b further has an edge 63 extending obliquely upward (toward the outdoors) from the right end of the tip plate 61. The edge 63 is shorter in the vertical direction than the side plate 60, for example, about one-third the length of the side plate 60. The edge 63 is curved in an arc shape.

[0075] The outdoor-side skin 2 has a plurality of grooves 25 formed therein, extending in one direction (front-to-back direction) and parallel to one another. Each of the grooves 25 is recessed downward (toward the indoor side). Each of the grooves 25 is provided over the entire length of the outdoor-side skin 2 in the longitudinal direction (front-to-back direction). The grooves 25 are positioned at intervals in the width direction (left-to-right direction) of the outdoor-side skin 2. In this embodiment, the grooves 25 are arranged at equal intervals.

[0076] The outdoor-side skin 2 has a plurality of flat plate portions 26 positioned next to the groove portions 25 in the width direction (left-right direction). The flat plate portions 26 and the groove portions 25 are alternately arranged one by one in the width direction of the outdoor-side skin 2. In this embodiment, the outdoor-side skin 2 has a plurality of flat plate portions 26 and a plurality of groove portions 25 instead of the main body portion 20.

[0077] In this embodiment, the outdoor-side skin 2 has three groove portions 25. Each of the three groove portions 25 has two side plate portions 250 that protrude obliquely downward (toward the indoor side) from each of two flat plate portions 26 adjacent to each other in the left-right direction, and a bottom plate portion 251 that is continuous with the two side plate portions 250 and forms the bottom surface of the groove portion 25. Each of the two side plate portions 250 and the bottom plate portion 251 is flat. The bottom plate portion 251 is parallel to the flat plate portion 26. The two side plate portions 250 are provided such that the spacing between the two side plate portions 250 becomes narrower as they are closer to the bottom plate portion 251. The vertical length of each of the three groove portions 25 is shorter than the vertical length of each protrusion portion 6, for example, one-third or less.

[0078] The three grooves 25 are arranged on the outdoor-side skin 2 at positions facing the outdoor side relative to the three intermediate protrusions 6c on the indoor-side skin 3. In this embodiment, of the three grooves 25, the central groove 25 is wider than the grooves 25 located at both ends. The bottom plate portion 251 of the central groove 25 is slightly longer in the left-right direction than the bottom plate portions 251 of the grooves 25 at both ends.

[0079] A part (lower end) of the side plate part 60 of the right end protrusion 6b of the indoor side outer skin 3, a tip plate part 61 and a right edge part 63 protrude to the right of the core material 4 and the outdoor side outer skin 2, and this protruding part constitutes the indoor side covering part 7. The indoor side covering part 7 has an inclined part 70 consisting of a part (lower end) of the side plate part 60, a main body 71 consisting of the tip plate part 61, and a tip part 72 consisting of the edge part 63.

[0080] The recessed step 23 is located opposite the side plate 60 of the end protrusion 6b at the right end of the indoor-side outer skin 3. The outdoor-side covering portion 21 is continuous with the flat plate portion 26 at the left end, and the recessed step 23 is continuous with the flat plate portion 26 at the right end.

[0081] The skins 2, 3 are arranged so that the left edge 22 of the outdoor skin 2 faces the left edge 62 of the indoor skin 3, and the right edge 24 of the outdoor skin 2 faces the side panel 60 of the right end protrusion 6b of the indoor skin 3. The core material 4 is filled between the parts of the skins 2, 3 that face each other in the vertical direction.

[0082] A tape-like sealant 16 is attached to the upper (outdoor) surface of the tip plate 61 of the right end protrusion 6b of the indoor-side outer skin 3. The sealant 16 is attached to the tip plate 61 of the end protrusion 6b over the entire length in the front-to-rear direction.

[0083] The fixing device 12a penetrates the portion of the second panel P2 where the end protrusion portion 6a is located and the indoor covering portion 7 of the first panel P1 (more specifically, the tip plate portion 61 of the end protrusion portion 6b of the first panel P1), and the tip of the fixing device 12a is fixed to the base material 10.

[0084] The fire-resistant connection structure 1 of this embodiment further includes spacers 18 that are placed in the multiple grooves 25 of the panels P1 and P2. The spacers 18 are placed in each of the multiple grooves 25 of the panels P1 and P2, filling each groove 25. The spacers 18 are placed in each groove 25 over the entire length in the front-to-rear direction. The spacers 18 are strip-shaped and have a thickness that allows them to fit within each groove 25.

[0085] In the fire-resistant connection structure 1 of this embodiment, the tip plate portion 61 of each of the multiple protrusions 6 of the first panel P1 abuts against the base material 10. The tip plate portion 61 of each of the multiple protrusions 6 of the second panel P2, excluding the end protrusions 6a, abuts against the base material 10.

[0086] The tip plate portion 61 of the end ridge portion 6a of the second panel P2 overlaps the sealing material 16 on the tip plate portion 61 of the end ridge portion 6b of the first panel P1. The right side of the core material 4 of the first panel P1 abuts against the gasket 11 on the left side of the core material 4 of the second panel P2. The outdoor-side cover portion 21 of the second panel P2 fits into the recessed step portion 23 of the first panel P1.

[0087] In the panels P1 and P2, where the tip plate portion 61 of the end ridge portion 6b of the first panel P1 and the tip plate portion 61 of the end ridge portion 6a of the second panel P2 overlap in the indoor-outdoor direction, fasteners 12a are driven from the outdoor side and fixed to the base material 10. In the panels P1 and P2, where the grooves 25 and intermediate ridges 6c are provided, fasteners 12b and 17 are driven from the outdoor side and fixed to the base material 10. The heads of the fasteners 12b and 17 fit into the grooves 25 of each panel P1 and P2 and are covered by spacers 18 arranged in each groove 25. The spacers 18 fill the corresponding grooves 25, and the outdoor side of the spacers 18 is positioned approximately flush with the outdoor side of the flat plate portions 26 of the panels P1 and P2.

[0088] A sealant 14 is sandwiched between the outdoor-side covering portion 21 of the second panel P2 and the recessed step portion 23 of the first panel P1. A second fastener 13a is driven into the outdoor-side covering portion 21 of the second panel P2 from the outdoor side, and is fixed to the recessed step portion 23, edge portion 24, and core material 4 of the first panel P1. The tip (indoor-side end) of the second fastener 13a is located within the core material 4 of the first panel P1, and does not penetrate the indoor-side exterior skin 3 of the first panel P1.

[0089] A joint cover member 15 is attached to the exterior skin 2 of the panels P1, P2, spanning from the flat plate portion 26 at the right end of the first panel P1 to the flat plate portion 26 at the left end of the second panel P2. A roofing material 19 such as a waterproof sheet is attached to the exterior surfaces of the connected panels P1, P2.

[0090] 2. Action and Effects In the fire-resistant connection structure 1 of embodiment 2 described above, the indoor-side covering portion 7 of the first panel P1 extends to a position where it overlaps with the outermost surface of the indoor-side outer skin 3 of the second panel P2 (the surface of the tip plate portion 61 of the end protrusion portion 6a facing the indoor side), so no joint exposed toward the indoor side is formed between the first panel P1 and the second panel P2. Therefore, in the case of a fire breaking out on the indoor sides of the panels P1, P2, the fire-resistant connection structure 1 of this embodiment can prevent flames from penetrating between the panels P1, P2 through the joint exposed toward the indoor side.

[0091] Additionally, in the fire-resistant connection structure 1 of this embodiment, the indoor-side covering portion 7 of the first panel P1 is fixed in a sandwiched state between the base material 10 and the end protrusion portion 6a of the second panel P2. Therefore, in the fire-resistant connection structure 1 of embodiment 2, when a fire breaks out on the indoor sides of the panels P1, P2, the indoor-side covering portion 7 is less likely to deform, making it easier to maintain the state in which the packing 11 between the panels P1, P2 is covered by the indoor-side covering portion 7, and flames are less likely to penetrate between the panels P1, P2.

[0092] Additionally, in the fire-resistant connection structure 1 of this embodiment, the indoor-side outer skin 3 has end protrusions 6a, 6b at the ends where the panels P1, P2 are connected to each other, and the thickness of the panels P1, P2 is increased, so that the length of the gap between the panels P1, P2 in the panel thickness direction can be increased, making it difficult for flames to pass between the panels P1, P2. Therefore, the fire-resistant connection structure 1 of this embodiment can prevent flames from entering and passing through between the panels P1, P2, further improving the fire resistance of the connection portion.

[0093] Furthermore, in the fire-resistant connection structure 1 of this embodiment, the indoor-side covering portion 7 of the first panel P1 has a main body 71 that fits along the tip plate portion 61 of the end protrusion portion 6a of the second panel P2, and a tip portion 72 that fits along the side plate portion 60 of the end protrusion portion 6a. Therefore, in the fire-resistant connection structure 1 of this embodiment, the opening of the joint formed between the tip portion 72 of the indoor-side covering portion 7 of the first panel P1 and the side plate portion 60 of the end protrusion portion 6a of the second panel P2 is prevented from facing the indoor side, making it possible to prevent flames from entering this joint from the indoor side in the event of a fire.

[0094] 3. Variations Next, a description will be given of modified examples of the fireproof connection structure 1 of the above-mentioned embodiment 2. The modified examples shown below can be combined as appropriate. The fireproof connection structure 1 of the embodiment 2 can be combined as appropriate with the modified examples of the fireproof connection structure 1 of the above-mentioned embodiment 1.

[0095] The fire-resistant connection structure 1 of this embodiment is not limited to the structure shown in FIG. 3 . For example, as shown in FIG. 6A , the fire-resistant connection structure 1 may include, as the connecting member 13, a sheet-like member 13b attached to the exterior-side covering portion 21 of the second panel P2 and the exterior-side outer skin 2 of the first panel P1, instead of the second fastener 13a. The sheet-like member 13b is, for example, tape. In the example shown in FIG. 6A , the sheet-like member 13b is attached to the exterior-side outer skin 2 of the panels P1 and P2, extending from the flat plate portion 26 at the right end of the first panel P1 to the flat plate portion 26 at the left end of the second panel P2. In the event of a fire on the indoor side of the panels P1 and P2, deformation of the exterior-side covering portion 21 is suppressed by the sheet-like member 13b. Note that the sheet-like member 13b may be formed of a joint cover member 15. In this case, the joint cover member 15 preferably has an adhesive surface that can provide a fixing strength similar to that of the second fastener 13a. Moreover, the fire-resistant connection structure 1 shown in FIG. 6A may further include a joint covering member 15 in addition to the sheet-like member 13b.

[0096] 6B, the fire-resistant connection structure 1 does not have to include either or both of the sealant 14 and the joint covering member 15. The fire-resistant connection structure 1 of embodiment 1 can also employ the modified examples shown in FIGS. 6A and 6B.

[0097] Furthermore, the connecting member 13 may be any member capable of connecting the outdoor-side covering portion 21 of the second panel P2 and the outdoor-side outer skin 2 of the first panel P1, and may be any member other than the second fixing device 13a shown in Figure 3 or the sheet-like member 13b shown in Figure 6A.

[0098] Furthermore, the sandwich panel 5 is not limited to the structure shown in Fig. 4. The indoor-side skin 3 may have an uneven shape with a plurality of protrusions 6, and the shape, size, and number of the protrusions 6 are not limited to those shown in Fig. 4. Furthermore, the outdoor-side skin 2 may be flat and not have a plurality of grooves 25.

[0099] Furthermore, the indoor covering portion 7 of the first panel P1 does not have to have a tip portion 72 that runs along the right side plate portion 60 of the end protrusion portion 6a of the second panel P2, and may be composed only of the inclined portion 70 and the main body 71.

[0100] (summary) Like the fireproof connection structures 1 of the first and second embodiments and their modifications described above, the fireproof connection structure 1 of the first aspect has the following configuration.

[0101] That is, the fire-resistant connection structure 1 of the first embodiment includes a base material 10, a first panel P1 and a second panel P2 arranged on the outdoor side of the base material 10, a gasket 11 sandwiched between the first panel P1 and the second panel P2, and a fastener 12 that penetrates the second panel P2 and secures it to the base material 10. Each of the first panel P1 and the second panel P2 is a sandwich panel 5 having a metal outdoor-side skin 2 and an indoor-side skin 3 facing each other, and a core material 4 located between the outdoor-side skin 2 and the indoor-side skin 3. The indoor-side skin 3 of the first panel P1 is provided with an indoor-side covering portion 7 that covers the gasket 11 between the first panel P1 and the second panel P2 from the indoor side. The indoor-side covering portion 7 extends to a position overlapping the outermost surface of the indoor-side skin 3 of the second panel P2. The indoor-side covering portion 7 is fixed while being sandwiched between the second panel P2 and the base material 10.

[0102] In the fire-resistant connection structure 1 of the first embodiment having the above-described configuration, the indoor-side covering portion 7 of the first panel P1 extends to a position overlapping the outermost surface of the indoor-side outer skin 3 of the second panel P2, so no joint exposed toward the indoor side is formed between the first panel P1 and the second panel P2. Therefore, in the case of a fire breaking out on the indoor sides of the panels P1 and P2, the fire-resistant connection structure 1 of the first embodiment can prevent flames from penetrating between the panels P1 and P2 through the joint exposed toward the indoor side. Additionally, in the fire-resistant connection structure 1 of this embodiment, the indoor-side covering portion 7 of the first panel P1 is fixed in a sandwiched state between the base material 10 and the second panel P2. Therefore, in the fire-resistant connection structure 1 of the first embodiment, in the case of a fire breaking out on the indoor sides of the panels P1 and P2, the indoor-side covering portion 7 is less likely to deform, making it easier to maintain the state in which the packing 11 between the panels P1 and P2 is covered by the indoor-side covering portion 7, and flames are less likely to penetrate between the panels P1 and P2. Therefore, in the fire-resistant connection structure 1 of the first aspect, the penetration of flames into the space between the panels P1 and P2 can be suppressed, and the fire resistance of the connection portion can be improved.

[0103] Furthermore, like the fireproof connection structures 1 of the first and second embodiments and their modifications described above, the fireproof connection structure 1 of the second aspect additionally includes the following configuration in addition to the configuration of the first aspect.

[0104] That is, in the second embodiment of the fire-resistant connection structure 1, the fastener 12 includes a fastener 12a that penetrates the second panel P2 and the indoor covering portion 7 and fixes the indoor covering portion 7 to the second panel P2 and the base material 10.

[0105] In the second embodiment of the fire-resistant connection structure 1 having the above-mentioned configuration, the fixing device 12a penetrates the second panel P2 and the indoor side covering portion 7, fixing the indoor side covering portion 7 to the second panel P2 and the base material 10, making it even easier to prevent deformation of the indoor side covering portion 7 during a fire.

[0106] Furthermore, like the fireproof connection structures 1 of the first and second embodiments and their modifications described above, the fireproof connection structure 1 of the third aspect additionally has the following configuration in addition to the configuration of the first or second aspect.

[0107] That is, the fire-resistant connection structure 1 of the third embodiment further includes a connecting member 13 that connects the outdoor-side outer skin 2 of the first panel P1 and the outdoor-side outer skin 2 of the second panel P2. The outdoor-side outer skin 2 of the second panel P2 is provided with an outdoor-side covering portion 21 that covers the gasket 11 between the first panel P1 and the second panel P2 from the outdoor side. The outdoor-side covering portion 21 is connected to the outdoor-side outer skin 2 of the first panel P1 by the connecting member 13.

[0108] In the fire-resistant connection structure 1 of the third embodiment having the above configuration, the packing 11 between the first panel P1 and the second panel P2 can be covered from the outdoor side by the outdoor-side covering part 21 of the second panel P2, and deformation of the outdoor-side covering part 21 in the event of a fire can be suppressed by the connecting member 13. Therefore, the fire-resistant connection structure 1 of the third embodiment can suppress the passage of flames between the panels P1 and P2, making it easier to further improve the fire resistance of the connection portion.

[0109] Like the fireproof connection structures 1 of the first and second embodiments and their modifications described above, the fireproof connection structure 1 of the fourth aspect additionally includes the following configuration in addition to the configuration of the third aspect.

[0110] That is, in the fire-resistant connection structure 1 of the fourth embodiment, the connecting member 13 is a second fastener 13a that penetrates the outdoor-side covering portion 21 and fixes the outdoor-side covering portion 21 to the outdoor-side outer skin 2 of the second panel P2.

[0111] In the fourth embodiment of the fire-resistant connection structure 1 having the above-mentioned configuration, it is easy to firmly fix the outdoor-side covering portion 21 of the second panel P2 to the outdoor-side outer skin 2 of the second panel P2, making it easy to prevent deformation of the outdoor-side covering portion 21 in the event of a fire.

[0112] Furthermore, like the fireproof connection structures 1 of the first and second embodiments and their modifications described above, the fireproof connection structure 1 of the fifth aspect additionally includes the following configuration in addition to the configuration of the third aspect.

[0113] That is, in the fire-resistant connection structure 1 of the fifth embodiment, the connecting member 13 is a sheet-like member 13b attached so as to extend from the outdoor-side covering portion 21 to the outdoor-side outer skin 2 of the first panel P1.

[0114] In the fire-resistant connection structure 1 of the fifth aspect having the above configuration, the outdoor-side covering portion 21 of the second panel P2 can be easily fixed to the outdoor-side outer skin 2 of the first panel P1, and deformation of the outdoor-side covering portion 21 in the event of a fire can be easily suppressed. In addition, the sheet-like member 13b is less likely to get in the way when attaching a top covering material 19 such as a waterproof sheet to the outdoor-facing surfaces of the panels P1 and P2.

[0115] Furthermore, like the fireproof connection structure 1 of the above-mentioned embodiments 1 and 2 and their modified examples, the fireproof connection structure 1 of the sixth aspect additionally has the following configuration in addition to the configuration of any one of the third to fifth aspects.

[0116] That is, the fire-resistant connection structure 1 of the sixth embodiment further includes a sealant 14 sandwiched between the outdoor-side covering portion 21 of the second panel P2 and the outdoor-side outer skin 2 of the first panel P1.

[0117] In the sixth embodiment of the fire-resistant connection structure 1 having the above-mentioned configuration, the gap between the outdoor covering portion 21 of the second panel P2 and the outdoor outer skin 2 of the first panel P1 can be filled with sealing material 14, making it more difficult for flames to pass between the panels P1 and P2.

[0118] Furthermore, like the fireproof connection structure 1 of the above-mentioned embodiments 1 and 2 and their modified examples, the fireproof connection structure 1 of the seventh aspect additionally has the following configuration in addition to the configuration of any one of the third to sixth aspects.

[0119] That is, the fire-resistant connection structure 1 of the seventh embodiment further includes a sheet-like joint covering member 15 attached so as to extend from the outdoor covering portion 21 of the second panel P2 to the outdoor outer skin 2 of the first panel P1.

[0120] In the seventh aspect of the fire-resistant connection structure 1 having the above-described configuration, the joint covering member 15 can easily prevent deformation of the outdoor-side covering portion 21 in the event of a fire, and can also easily prevent flames from passing between the panels P1 and P2. Furthermore, the sheet-like joint covering member 15 does not get in the way when attaching a top covering material 19 such as a waterproof sheet to the outdoor-facing surfaces of the panels P1 and P2.

[0121] Furthermore, like the fireproof connection structure 1 of the above-mentioned embodiment 2 and its modified example, the fireproof connection structure 1 of the eighth aspect additionally has the following configuration in addition to the configuration of any one of the first to seventh aspects.

[0122] That is, in the fire-resistant connection structure 1 of the eighth embodiment, the indoor-side outer skin 3 of each of the first panel P1 and the second panel P2 has a plurality of ridges 6 that protrude toward the indoor side. The plurality of ridges 6 include end ridges 6a that are located at the ends of the sandwich panel 5. The indoor-side covering portion 7 of the first panel P1 extends so as to overlap the indoor side of the end ridges 6a of the second panel P2, and is fixed in a sandwiched state between the end ridges 6a of the second panel P2 and the base material 10.

[0123] In the eighth aspect of the fire-resistant connection structure 1 having the above-mentioned configuration, the indoor side outer skin 3 has an end protrusion portion 6a at the end where the panels P1 and P2 are connected to each other, and since the thickness of the panels P1 and P2 is increased, the length in the panel thickness direction between the panels P1 and P2 can be increased, making it difficult for flames to pass between the panels P1 and P2.

[0124] Furthermore, like the fireproof connection structure 1 of the second embodiment and its modified example, the fireproof connection structure 1 of the ninth aspect additionally includes the following configuration in addition to the configuration of the eighth aspect.

[0125] That is, in the fire-resistant connection structure 1 of the ninth aspect, the end protrusion portion 6a includes a side plate portion 60 that protrudes toward the indoor side, and a tip plate portion 61 that is continuous with the side plate portion 60 and is located at the tip in the protruding direction. The indoor-side covering portion 7 of the first panel P2 has a main body 71 that fits along the tip plate portion 61 of the end protrusion portion 6a of the second panel P1, and a tip portion 72 that fits along the side plate portion 60.

[0126] In the ninth embodiment of the fire-resistant connection structure 1 having the above-mentioned configuration, the opening of the joint formed between the tip 72 of the indoor side covering portion 7 and the side plate portion 60 of the end protrusion portion 6a facing it is unlikely to face the indoor side, making it difficult for flames to penetrate this joint from the indoor side.

[0127] The present disclosure has been described above based on the embodiments shown in the accompanying drawings, but the above embodiments are merely examples of the present disclosure, and appropriate design changes are possible within the intended scope of the present disclosure. [Explanation of symbols]

[0128] 1. Fire-resistant connection structure for sandwich panels 2 Outdoor skin 21 Outdoor cover 3 Indoor side skin 4 Core material 5. Sandwich Panels 6 Projection part 6a End protrusion 60 Side plate part 61 Tip plate 7 Indoor covering section 71 Main Unit 72 Tip 10 Undercoat 11 Packing 12 Fixtures 12a Fixture 13 Connecting member 13a Second fixture 13b Sheet-like member 14 Sealant 15 Joint covering material

Claims

1. The base material and a first panel and a second panel arranged on the exterior side of the base material; a packing sandwiched between the first panel and the second panel; a fastener that penetrates the second panel and fastens it to the base material; Equipped with each of the first panel and the second panel is a sandwich panel having an outdoor-side outer skin and an indoor-side outer skin that are made of metal and that face each other, and a core material located between the outdoor-side outer skin and the indoor-side outer skin; an indoor-side covering portion that covers the packing between the first panel and the second panel from the indoor side; The indoor side covering portion extends to a position overlapping with the outermost surface of the indoor side outer skin of the second panel, The indoor covering portion is a fire-resistant connection structure of a sandwich panel in which it is fixed in a sandwiched state between the second panel and the base material, The fasteners include fasteners that penetrate the second panel and the indoor covering portion and fasten the indoor covering portion to the second panel and the base material, The fire-resistant connection structure is a connecting member that connects the exterior skin of the first panel and the exterior skin of the second panel, an outdoor-side covering portion that covers the packing between the first panel and the second panel from the outdoor side is provided on the outdoor-side outer skin of the second panel; the outdoor-side covering portion is connected to the outdoor-side outer skin of the first panel by the connecting member, the connecting member is a second fastener that penetrates the outdoor-side covering portion and fixes the outdoor-side covering portion to the outdoor-side outer skin of the first panel, The second fixture is a fixture separate from the fixture. A fire-resistant connection structure for sandwich panels.

2. The second panel further includes a sealing material sandwiched between the outdoor covering portion of the second panel and the outdoor outer skin of the first panel. The fire-resistant connection structure for sandwich panels according to claim 1.

3. The invention further comprises a sheet-like joint covering member attached so as to extend from the outdoor covering portion of the second panel to the outdoor outer skin of the first panel.

3. A fire-resistant connection structure for sandwich panels according to claim 1 or 2.

4. The indoor side outer skin of each of the first panel and the second panel has a plurality of protrusions protruding toward the indoor side, The plurality of protrusions include end protrusions located at the ends of the sandwich panel, The indoor covering portion of the first panel extends so as to overlap the indoor side of the end protrusion portion of the second panel, and is fixed in a sandwiched state between the end protrusion portion of the second panel and the base material. A fire-resistant connection structure for sandwich panels according to any one of claims 1 to 3.

5. The end protrusion portion includes a side plate portion protruding toward the indoor side, and a tip plate portion that is continuous with the side plate portion and is located at the tip of the protruding direction, The indoor covering portion of the first panel has a main body that is aligned with the tip plate portion of the end protrusion portion of the second panel, and a tip portion that is aligned with the side plate portion. The fire-resistant connection structure for sandwich panels according to claim 4.

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