Wall panel

Abstract

To provide a wall panel capable of suppressing intrusion of a droplet into a building.SOLUTION: A wall panel for constituting a non-bearing wall of a building includes: a tabular lower side wall panel which includes a lower side non-combustible layer that is arranged between a lower side first wooden layer and a lower side second wooden layer and that is formed by a non-combustible material; a tabular upper side wall panel which includes an upper side non-combustible layer that is arranged between an upper side first wooden layer and an upper side second wooden layer and that is formed by a non-combustible material; and a joint part formed between the lower side wall panel and the upper side wall panel. The joint part includes: a cut-off material arranged being adjacent to the upper side second wooden layer; and a cover member which is arranged below the cut-off material, and extending from one end part positioned further on the opposite side from an outside space side than the surface of the outside space side of the cut-off material to the outside space side beyond the upper side non-combustible layer and the lower side non-combustible layer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to wall panels for constructing non-load-bearing walls of a building. [Background technology]

[0002] Conventionally, various efforts have been made to improve the fire resistance of wooden walls. For example, Patent Document 1 discloses a structural material that includes a load-bearing layer made of wood sufficient to support a long-term load, a fire-stopping layer that is placed around the periphery of the load-bearing layer and has a heat insulating material (non-combustible wood, calcium silicate board, rock wool, glass wool, etc.), and a burning margin layer that is placed around the periphery of the fire-stopping layer and is made of wood. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-036457 Summary of the Invention [Problem to be solved by the invention]

[0004] A wooden wall may include two wall panels arranged vertically and connected to each other, and a joint (joint) for connecting the two wall panels. In this case, the upper wall panel has a fire-retardant layer that prevents moisture from entering the building, but there is a risk that moisture droplets may be guided into the joint. These droplets may then enter the building through the joint. However, Patent Document 1 does not disclose or suggest how to prevent moisture from entering through the joint.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a wall panel that can prevent droplets from entering the interior of a building.

[0006] Incidentally, walls may include non-load-bearing walls that are considered not to bear loads as part of the structure of a building. Non-load-bearing walls differ from load-bearing walls in terms of the structural performance and fire resistance required of a building. For this reason, it is economically unreasonable to provide non-load-bearing walls with the same fire resistance as load-bearing walls. The wall panel according to the present disclosure is applied to construct non-load-bearing walls of a building (the technology disclosed in Patent Document 1 is directed to load-bearing walls). [Means for solving the problem]

[0007] In order to achieve the above object, the wall panel according to the present disclosure is a wall panel for constituting a non-load-bearing wall of a building, and includes: a lower first wood layer that is arranged facing an exterior space of the building and that includes wood; a lower second wood layer that is arranged on the opposite side of the exterior space across the lower first wood layer and that includes wood; and a lower non-combustible layer that is arranged between the lower first wood layer and the lower second wood layer and that is made of a non-combustible material; and an upper wall panel that is arranged above the lower wall panel and that includes an upper first wood layer that includes wood; and a lower second wood layer that is arranged on the opposite side of the exterior space across the upper first wood layer and that includes wood. and a planar upper wall panel including an upper second wood layer arranged between the upper first wood layer and the upper second wood layer, the upper second wood layer including wood, and an upper non-combustible layer arranged between the upper first wood layer and the upper second wood layer, the upper non-combustible layer being formed from non-combustible material; and a joint portion formed between the lower wall panel and the upper wall panel, the joint portion including a water-stopping material arranged in contact with the upper second wood layer, and a cover member located below the water-stopping material, the cover member extending from one end located on the opposite side to the outer space side from the outer space side surface of the water-stopping material to the outer space side beyond the upper non-combustible layer and the lower non-combustible layer. [Effects of the Invention]

[0008] The wall panel of the present disclosure can prevent droplets from entering the interior of a building. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating a schematic configuration of a building having a first exterior wall constructed of wall panels according to some embodiments. FIG. [Figure 2] 1 is a diagram showing a schematic configuration of a wall panel according to a first embodiment. FIG. [Figure 3] 3 is an enlarged view schematically illustrating a portion of the configuration of a joint portion according to the first embodiment. FIG. [Figure 4] 5A to 5C are diagrams for explaining the action and effect of the wall panel according to the first embodiment. [Figure 5] 1A-1C are schematic diagrams illustrating wall panel configurations according to some embodiments. [Figure 6] FIG. 10 is a diagram schematically showing the configuration of a wall panel according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The wall panel according to the embodiment of the present disclosure will be described below with reference to the drawings. The embodiment shows one aspect of the present disclosure, but does not limit the present disclosure and can be modified as desired within the scope of the technical concept of the present disclosure.

[0011] <Building> Fig. 1 is a diagram schematically illustrating the configuration of a building 200 including a first exterior wall 100A constructed of wall panels 1 according to some embodiments. In the example illustrated in Fig. 1, the building 200 includes the exterior wall 100, a roof 102, and a plurality of floors 104 arranged at intervals along the vertical direction D1. Specifically, the building 200 is an eight-story building erected on ground G. The building structure of the building 200 is not particularly limited, and any building structure such as wood, steel frame, reinforced concrete, or steel-reinforced concrete may be used.

[0012] The building 200 is surrounded by an exterior wall 100 and a roof 102, forming an interior space 201. The exterior wall 100 includes an interior wall surface 106 facing the interior space 201 of the building 200, and an exterior wall surface 108 facing an exterior space 203 of the building 200.

[0013] In the example shown in Fig. 1, the building 200 includes a first exterior wall 100A (100) and a second exterior wall 100B (100). The first exterior wall 100A is a non-bearing wall of the building 200 that is considered not to bear loads as part of the structure of the building 200 (not considered effective in terms of structural design). The first exterior wall 100A is composed of wall panels 1, which will be described later.

[0014] Second exterior wall 100B is a load-bearing wall among the walls of building 200 that is considered to bear the load as part of the structure of building 200, and resists both horizontal forces due to earthquakes and the like, and vertical forces due to the weight of building 200 and the like. Second exterior wall 100B may be connected to roof 102 and floor 104 via beams 112, or may be connected to roof 102 and floor 104 without beams 112.

[0015] 1, the building 200 further includes an inner wall 110 (partition wall) that divides the inner space 201 and is a non-load-bearing wall. Note that the building 200 may also include an inner wall (partition wall) that divides the inner space 201 and is a load-bearing wall.

[0016] <Wall panel> (First embodiment) The wall panel 1 will be described below. Fig. 2 is a diagram schematically showing the configuration of the wall panel 1 according to the first embodiment. As described above, the wall panel 1 constitutes a non-load-bearing wall (first exterior wall 100A) of the building 200. As shown in Fig. 2, such a wall panel 1 includes a lower wall panel 2, an upper wall panel 4, and a joint portion 6.

[0017] The lower wall panel 2 includes a lower first wood layer 10, a lower second wood layer 12, and a lower non-combustible layer 14 arranged side by side along the thickness direction of the wall panel 1 (hereinafter referred to as the "thickness direction D2").

[0018] The first lower wood layer 10 is disposed facing the exterior space 203 of the building 200. The first lower wood layer 10 includes wood. Specifically, the first lower wood layer 10 is formed of a wood material in which plank-shaped wooden pieces W, such as sawn boards, are stacked so that the grain directions of the wooden pieces W are perpendicular to each other, which is known as CLT (Cross Laminated Timber). In some embodiments, the first lower wood layer 10 includes plywood or LVL (Laminated Veneer Lumber). In some embodiments, the first lower wood layer 10 is formed of a wood material in which a plurality of long wooden pieces W are stacked end-on along the short side direction of the wooden pieces W, which is known as NLT (Nail Laminated Timber).

[0019] The second lower wood layer 12 is disposed on the opposite side of the first lower wood layer 10 from the outer space 203. In other words, the second lower wood layer 12 is disposed closer to the inner space 201 in the thickness direction D2 than the first lower wood layer 10. The second lower wood layer 12 includes wood W. Specifically, like the first lower wood layer 10, the second lower wood layer 12 is formed of CLT so as to have a board shape. In some embodiments, the second lower wood layer 12 is formed of plywood, LVL, or NLT.

[0020] The lower non-combustible layer 14 is disposed between the lower first wood layer 10 and the lower second wood layer 12 in the thickness direction D2. The lower non-combustible layer 14 is formed of a non-combustible material M, such as a gypsum board made primarily of gypsum. The lower non-combustible layer 14 is not limited to a gypsum board, but may also be a calcium silicate board made primarily of lime and silica stone. In some embodiments, the lower non-combustible layer 14 is formed of wood W and cement (non-combustible material M), such as a wood wool cement board or a wood chip cement board.

[0021] 2, the upper wall panel 4 is disposed above the lower wall panel 2. The upper wall panel 4 includes an upper first wood layer 20, an upper second wood layer 22, and an upper non-combustible layer 24, which are arranged side by side along the thickness direction D2.

[0022] The upper first wood layer 20 is disposed facing the exterior space 203 of the building 200. The upper first wood layer 20 includes wood. Specifically, the upper first wood layer 20 is formed of CLT so as to have a board shape. In some embodiments, the upper first wood layer 20 is formed of plywood, LVL, or NLT.

[0023] The second upper wood layer 22 is disposed on the opposite side of the first upper wood layer 20 from the outer space 203. In other words, the second upper wood layer 22 is disposed closer to the inner space 201 in the thickness direction D2 than the first upper wood layer 20. The second upper wood layer 22 includes wood W. Specifically, the second upper wood layer 22 is formed of CLT so as to have a board shape. In some embodiments, the second upper wood layer 22 is formed of plywood, LVL, or NLT.

[0024] The upper non-combustible layer 24 is disposed between the upper first wood layer 20 and the upper second wood layer 22 in the thickness direction D2. The upper non-combustible layer 24 is formed from a non-combustible material M, such as a gypsum board made primarily of gypsum. The upper non-combustible layer 24 is not limited to a gypsum board, but may also be a calcium silicate board made primarily of lime and silica stone. In some embodiments, the upper non-combustible layer 24 is formed from wood W and cement (non-combustible material M), such as a wood wool cement board or a wood chip cement board.

[0025] As shown in Fig. 2, in the first embodiment, the upper wall panel 4 has a hole 21 formed in the lower surface 5 of the upper wall panel 4, recessed upward from a portion closer to the outer space 203 than the upper fireproof layer 24. That is, the hole 21 is formed in the upper first wood layer. The hole 21 is located closer to the inner space in the thickness direction D2 than a sealing material 34, which will be described later. Note that the present disclosure is not limited to the hole 21 being formed in the lower surface 5 of the upper wall panel 4. In some embodiments, the hole 21 is not formed in the lower surface 5 of the upper wall panel 4.

[0026] As shown in FIG. 2 , in the first embodiment, each of the lower second wood layer 12 and the upper second wood layer 22 has a flame-retardant portion 8 impregnated with a flame retardant X. The flame retardant X is, for example, a phosphorus-based flame retardant, a nitrogen-based flame retardant, a phosphorus-nitrogen-based flame retardant, or a boric acid-based flame retardant. The flame-retardant portion 8 is located on the inner space 201 side of each of the lower second wood layer 12 and the upper second wood layer 22. Although not shown, a flame-retardant film made of the flame retardant X may be provided on the surface of each of the lower second wood layer 12 and the upper second wood layer 22 facing the inner space 201. Note that the present disclosure is not limited to the flame-retardant portion 8 being formed in each of the lower second wood layer 12 and the upper second wood layer 22. In some embodiments, the flame-retardant portion 8 is not formed in either the lower second wood layer 12 or the upper second wood layer 22.

[0027] In the first embodiment, the lower first wood layer 10, the lower second wood layer 12, the upper first wood layer 20, and the upper second wood layer 22 all have the same length in the thickness direction D2, e.g., 30 mm. The lower non-combustible layer 14 and the upper non-combustible layer 24 all have the same length in the thickness direction D2, e.g., 5 mm. The lower first wood layer 10, the lower second wood layer 12, the upper first wood layer 20, and the upper second wood layer 22 may have different lengths in the thickness direction D2. The lower non-combustible layer 14 and the upper non-combustible layer 24 may have different lengths in the thickness direction D2.

[0028] The lower first wood layer 10, the lower second wood layer 12, the upper first wood layer 20 and the upper second wood layer 22 may each be formed from wood W of the same tree species, or may each be formed from wood W of different tree species.

[0029] As shown in FIG. 2 , a joint 6 (joint) is formed between the lower wall panel 2 and the upper wall panel 4. The joint 6 includes a water-stopping material 30 and a cover member 32. In the first embodiment, the joint 6 further includes a sealant 34, a drainage pipe 36, a thermal expansion material 38, and a weight-bearing member 50. A gap 40 is formed between the upper surface 7 of the lower wall panel 2 and the lower surface 5 of the upper wall panel 4. The water-stopping material 30, the cover member 32, the sealant 34, and the thermal expansion material 38 are arranged in this gap 40.

[0030] The water-stopping material 30 is disposed in contact with the upper second wood layer 22. That is, the water-stopping material 30 is located on the underside 5 of the upper wall panel 4 closer to the inner space 201 in the thickness direction D2 than the upper non-combustible layer 24. In one embodiment, the water-stopping material 30 is a gasket, and is disposed so as to close the opening 41 of the gap 40 to the inner space 201.

[0031] The cover member 32 is located below the water-stopping material 30 within the gap 40. The cover member 32 extends from one end 35a, which is located on the opposite side of the outer space 203 from the guide surface 29, which is the surface of the water-stopping material 30 facing the outer space 203 in the thickness direction D2 (i.e., on the inner space 201 side), to the outer space 203 side beyond the upper non-combustible layer 24 and the lower non-combustible layer 14. In other words, the other end 35b of the cover member 32 is located closer to the outer space 203 than the upper non-combustible layer 24 and the lower non-combustible layer 14 in the thickness direction D2. In the first embodiment, for example, the cover member 32 is a waterproof tape that has waterproof properties and is attached to the upper surface 7 of the lower wall panel 2. The cover member 32 extends from the opening of the gap 40 to the inner space 201 to the sealant 34.

[0032] The sealant 34 is disposed within the gap 40 closer to the outer space 203 in the thickness direction D2 than the water-stopping material 30. In the first embodiment, the sealant 34 is disposed so as to block an opening 43 of the gap 40 to the outer space 203. The sealant 34 is formed of a resin foam such as urethane foam, and prevents the passage of water droplets such as rainwater, but allows moisture that accumulates in the gap 40 to escape into the outer space 203, thereby preventing a shortening of the product life of the wall panel 1. For example, Ilmodoeco manufactured by Tremco Illbruck (Tremco Illbruck GmbH, Germany) is used as the sealant 34.

[0033] The drain pipe 36 is connected to the sealing material 34. A drain flow path 37 including an outlet 39 that opens downward into the outer space 203 is formed inside the drain pipe 36. The inlet of the drain flow path 37 is located within the gap 40. In the first embodiment, the drain pipe 36 has an L-shape and includes a connection portion 36a that is connected to the sealing material 34 and extends along the thickness direction D2, and a downward extension portion 36b that extends downward from the end of the connection portion 36a on the outer space 203 side in the thickness direction D2 and has the outlet 39 formed at its tip.

[0034] The thermal expansion material 38 is disposed within the gap 40 above the cover member 32. In the first embodiment, the thermal expansion material 38 is disposed on the upper surface 42 of the cover member 32. The thermal expansion material 38 is disposed so as to straddle the lower first wood layer 10, the lower non-combustible layer 14, and the lower second wood layer 12 from above. The thermal expansion material 38 is formed from a rubber-based material or a resin material containing thermally expandable graphite, and expands (foams) when exposed to high heat in the event of a fire. Examples of such a thermal expansion material 38 include SK Taica Sheet (registered trademark), which is made from a special acrylic resin, and FiBlock (registered trademark), which is made from a plastic fire-resistant material.

[0035] The weight-receiving member 50 includes a support portion 52, an extension portion 54, and an insertion portion 56. A portion of the support portion 52 is inserted into the gap 40 and supports the upper wall panel 4 from below. Furthermore, the support portion 52 includes a protrusion 53 (the remaining part of the support portion 52) that protrudes from the gap 40 into the inner space 201. The extension portion 54 extends upward from the protrusion portion 53 into the inner space 201. The weight-receiving member 50 is configured so that the load is transmitted to the floor or pillar of the building 200 by connecting the extension portion 54 to the floor or pillar of the building 200 via metal fittings. The weight-receiving member 50 is made of metal. The insertion portion 56 extends upward from the support portion 52 and is inserted into the hole portion 21.

[0036] FIG. 3 is a diagram schematically illustrating the configuration of the joint portion 6 according to the first embodiment, as viewed from the inner space 201. The water-stopping material 30 includes a first water-stopping portion 31 and a second water-stopping portion 33 that are spaced apart from each other along the width direction of the wall panel 1 (hereinafter referred to as the "width direction D3"). The first water-stopping portion 31 is located on one side of the second water-stopping portion 33 in the width direction D3. The support portion 52 of the weight-receiving member 50 is located between the first water-stopping portion 31 and the second water-stopping portion 33. Specifically, the support portion 52 is sandwiched between the first water-stopping portion 31 and the second water-stopping portion 33.

[0037] The following describes the functions and effects of the wall panel 1 according to the first embodiment. Fig. 4 is a diagram for explaining the functions and effects of the wall panel 1 according to the first embodiment. As shown in Fig. 4, the upper wall panel 4 has an upper fireproof layer 24 that prevents moisture from entering the interior space 201 of the building 200, but there is a risk that moisture that has turned into droplets A will be guided to the joint portion 6 (joint). Then, there is a risk that these droplets A will move along the underside 5 of the upper wall panel 4 and enter the interior space 201.

[0038] To address this concern, according to the first embodiment, as shown in FIG. 4 , when liquid droplets A move along the lower surface 5 of the upper wall panel 4 toward the inner space 201, the liquid droplets A come into contact with the guide surface 29 of the water-stopping material 30 and move along the guide surface 29 toward the cover member 32. That is, the liquid droplets A are guided by the guide surface 29 to the cover member 32 or the thermal expansion material 38. Then, the liquid droplets A move along the upper surface 42 of the cover member 32 or the upper surface 44 of the thermal expansion material 38 toward the outer space 203. That is, the liquid droplets A can be guided to the outer space 203. This makes it possible to prevent the liquid droplets A from entering the inner space 201.

[0039] According to the first embodiment, the joint portion 6 includes the sealing material 34, which can prevent moisture from entering the gap 40 from the outer space 203. In other words, it is possible to prevent moisture from entering the inner space 201 from the outer space 203. Furthermore, the joint portion 6 includes the drainage pipe 36, which can drain the liquid droplets A guided by the cover member 32 or the thermal expansion material 38 from the gap 40 to the outer space 203 by the drainage pipe 36, as shown in FIG. 4 .

[0040] According to the first embodiment, the joint 6 includes the thermal expansion material 38, which expands due to high heat in the event of a fire, thereby filling the gap 40 and improving the fire resistance of the joint 6. Furthermore, as illustrated in Fig. 2, the thermal expansion material 38 is arranged from above to straddle the lower first wood layer 10, the lower non-combustible layer 14, and the lower second wood layer 12, which prevents the spread of a fire in the outer space 203 from the lower first wood layer 10 to the upper second wood layer 22, and prevents the spread of a fire in the inner space 201 from the lower second wood layer 12 to the upper first wood layer 20.

[0041] According to the first embodiment, the cover member 32 is a waterproof tape, so that the intrusion of the liquid droplets A into the lower wall panel 2 can be suppressed.

[0042] According to the first embodiment, the flame-retardant portion 8 is formed in each of the second lower wood layer 12 and the second upper wood layer 22, so that the fire resistance of the wall panel 1 can be improved.

[0043] According to the first embodiment, the joint 6 includes the weight-receiving member 50, which allows the load of the wall panel 1 to be transmitted to the pillars, floor, etc. of the building 200. According to the first embodiment, the insertion portion 56 of the weight-receiving member 50 is inserted into the hole 21 of the upper wall panel 4, which prevents the first upper wood layer 20 and the wall panel 1 itself from falling off. Note that in some embodiments, the weight-receiving member 50 includes the support portion 52 and the extension portion 54, but does not include the insertion portion 56.

[0044] According to the first embodiment, the water-stopping material 30 is configured to include a first water-stopping portion 31 and a second water-stopping portion 33, so that a wall panel 1 having a compactly designed joint portion 6 can be provided even when including a weight-receiving member 50.

[0045] In some embodiments, the cover member 32 is configured such that the upper surface 42 of the cover member 32 slopes downward as it approaches the outer space 203 in the thickness direction D2. For example, the upper surface 42 of the cover member 32 is sloped by sloped the upper surface 7 of the lower wall panel 2 downward as it approaches the outer space 203 in the thickness direction D2. With this configuration, the cover member 32 can smoothly guide the droplets A into the outer space 203. Note that the upper surface 42 of the cover member 32 itself may be sloped. In some embodiments, the thermal expansion material 38 is configured such that the upper surface 44 of the thermal expansion material 38 slopes downward as it approaches the outer space 203 in the thickness direction D2. With this configuration, the cover member 32 can smoothly guide the droplets A into the outer space 203.

[0046] Although the cover member 32 is a waterproof tape in the first embodiment, the present disclosure is not limited to this configuration. FIG. 5 is a diagram schematically illustrating the configuration of a wall panel 1 according to some embodiments. In some embodiments, the cover member 32 is a steel plate. As shown in FIG. 5 , the cover member 32 has an L-shape when viewed from the width direction D3 and includes a horizontal portion 48 that covers the upper surface 7 of the lower wall panel 2 and a lower portion 49 that extends downward from one end of the horizontal portion 48 on the outer space 203 side in the thickness direction D2. The sealant 34 and the thermal expansion material 38 are disposed on the upper surface 42 of the cover member 32 (the upper surface of the horizontal portion 48). At least one of the horizontal portion 48 and the lower portion 49 of the cover member 32 is fastened to the lower wall panel 2 by a bolt (not shown).

[0047] In the first embodiment, the lower wall panel 2 is composed of the above-mentioned three layers, but the present disclosure is not limited to this. The lower wall panel 2 may be composed of four or more layers, for example, a lower third wood layer containing wood W may be disposed between the lower first wood layer 10 and the lower non-combustible layer 14.

[0048] (Second embodiment) A wall panel 1 according to a second embodiment of the present disclosure will now be described. Fig. 6 is a diagram schematically illustrating the configuration of the wall panel 1 according to the second embodiment. The wall panel 1 according to the second embodiment differs from the first embodiment in that the upper wall panel 4 includes a protrusion 60 and the lower wall panel 2 includes a recess 62. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.

[0049] 6, the upper wall panel 4 includes a protrusion 60 that protrudes downward from the lower surface 5 of the upper wall panel 4. The lower wall panel 2 includes a recess 62 that is recessed downward from the upper surface 7 of the lower wall panel 2.

[0050] The protrusion 60 faces the outer space 203. That is, the protrusion 60 includes the surface of the upper wall panel 4 facing the outer space 203 in the thickness direction D2 (the outer surface of the upper wall panel 4). The recess 62 opens to the outer space 203. That is, the formation of the recess 62 cuts out the surface of the lower wall panel 2 facing the outer space 203 in the thickness direction D2 (the outer surface of the lower wall panel 2). The upper surface 7 of the lower wall panel 2 includes a first surface 7a formed by the bottom surface of the recess 62, a second surface 7b located above the first surface 7a and extending along the thickness direction D2, and a step surface 7c connecting the first surface 7a and the second surface 7b and extending along the up-down direction D1.

[0051] A protrusion 60 is inserted into the recess 62. In the embodiment illustrated in Fig. 6, the protrusion 60 is located closer to the outer space 203 in the thickness direction D2 than the upper non-combustible layer 24. The recess 62 is located closer to the outer space 203 in the thickness direction D2 than the lower non-combustible layer 14. Furthermore, the protrusion 60 is configured to have a smaller dimension in the thickness direction D2 than the recess 62. Therefore, a step-shaped gap 40 is formed between the lower wall panel 2 and the upper wall panel 4.

[0052] An opening 43 of the gap 40 to the outer space 203 is defined by a protrusion 60 and a recess 62. The sealant 34 is disposed in the recess 62 so as to close the opening 43. Specifically, the sealant 34 is sandwiched between the protrusion 60 and the recess 62. The cover member 32 (waterproof tape) is attached to each of the first surface 7a and the second surface 7b. The thermal expansion material 38 is disposed above the second surface 7b.

[0053] The following describes the operation and effect of the wall panel 1 according to the second embodiment. According to the second embodiment, by forming the gap 40 in a stepped shape, even if the sealant 34 is damaged, moisture entering from the outer space 203 is caused to collide with the stepped surface 7c, thereby preventing moisture from entering the inner space 201. In the second embodiment, the protrusion 60 faces the outer space 203, but the present disclosure is not limited to this configuration. In some embodiments, the protrusion 60 is located between the outer and inner surfaces of the upper wall panel 4 in the thickness direction D2. In this case, the recess 62 is located between the outer and inner surfaces of the lower wall panel 2 in the thickness direction D2.

[0054] According to the second embodiment, the protrusion 60 is located closer to the outer space 203 than the upper non-combustible layer 24, and the recess 62 is located closer to the outer space 203 than the lower non-combustible layer 14, so the position of the step surface 7c can be closer to the outer space 203 than the upper non-combustible layer 24 and the lower non-combustible layer. This makes it possible to provide a wall panel that can further suppress moisture penetration. In some embodiments, the protrusion 60 is located closer to the inner space 201 than the upper non-combustible layer 24, and the recess 62 is located closer to the inner space 201 than the upper non-combustible layer 24.

[0055] According to the second embodiment, since the sealant 34 is disposed in the recess 62, the intrusion of moisture into the gap 40 can be suitably suppressed.

[0056] The contents described in each of the above embodiments can be understood, for example, as follows.

[0057] [1] The wall panel according to the present disclosure is A wall panel (1) for constituting a non-load-bearing wall (100A) of a building (200), a lower wall panel (2) in the form of a plate, including a lower first wood layer (10) arranged facing the exterior space (203) of the building, the lower first wood layer including wood (W); a lower second wood layer (12) arranged on the opposite side of the exterior space across the lower first wood layer, the lower second wood layer including wood; and a lower non-combustible layer (14) arranged between the lower first wood layer and the lower second wood layer, the lower non-combustible layer being made of non-combustible material (M); an upper wall panel (4) in the form of a plate, including an upper wall panel arranged above the lower wall panel, a first upper wood layer (20) including wood, an upper second wood layer (22) arranged on the opposite side of the outer space across the first upper wood layer, the second upper wood layer including wood, and an upper non-combustible layer (24) arranged between the first upper wood layer and the second upper wood layer, the upper non-combustible layer being made of a non-combustible material; a joint (6) formed between the lower wall panel and the upper wall panel. The joint portion is a waterproofing material (30) disposed in contact with the upper second wood; and a cover member (32) that is located below the water-stopping material and extends from one end (35a) that is located on the opposite side of the outer space side from the outer space side surface (29) of the water-stopping material to the outer space side beyond the upper non-combustible layer and the lower non-combustible layer.

[0058] Although the upper non-combustible layer of the upper wall panel prevents moisture from penetrating into the interior space of the building, there is a risk that moisture droplets may be guided to the joints. These droplets may then travel along the underside of the upper wall panel and enter the interior space of the building. To address this risk, the configuration described in [1] above ensures that even if droplets move along the underside of the upper wall panel toward the interior space of the building, they are guided to the cover member by the water-stopping material. Furthermore, the cover member extends from one end to the exterior space beyond the upper non-combustible layer and the lower non-combustible layer, so that these droplets can be guided to the exterior space of the building. This prevents moisture from penetrating into the interior of the building.

[0059] [2] In some embodiments, in the configuration described in [1] above, The joint portion is a sealing material (34) disposed closer to the outer space than the water-stopping material; The system further includes a drain pipe (36) connected to the sealing material, the drain pipe (36) having a drain passage (37) formed therein, the drain passage including an outlet (39) that opens downward to the outer space.

[0060] According to the configuration described in [2] above, the sealant can prevent moisture from entering the gap between the lower wall panel and the upper wall panel from the outside space of the building. In other words, moisture can be prevented from entering the inside space from the outside space of the building. Furthermore, the drainage pipe can drain droplets from this gap into the outside space of the building.

[0061] [3] In some embodiments, in the configuration described in [1] or [2] above, The joint portion is The device further includes a thermal expansion material (38) disposed above the cover member.

[0062] According to the configuration described in [3] above, when a fire occurs, the thermal expansion material expands due to the high heat, thereby filling the gap and improving the fire resistance of the joint.

[0063] [4] In some embodiments, in the configuration described in any one of [1] to [3] above, The cover member is a waterproof tape or a steel plate.

[0064] According to the configuration described in [4] above, it is possible to prevent droplets from entering the lower wall panel.

[0065] [5] In some embodiments, in the configuration described in [2] above, The upper wall panel includes a protrusion (60) that protrudes downward from the lower surface (5) of the upper wall panel and faces the outer space, The lower wall panel includes a recess (62) that is recessed downward from the upper surface (7) of the lower wall panel, into which the protrusion is inserted, and that opens to the outer space.

[0066] According to the configuration described in [5] above, by forming the gap in a stepped shape, it is possible to prevent moisture from entering the interior space from the exterior space of the building even if the sealing material is damaged.

[0067] [6] In some embodiments, in the configuration described in [5] above, The convex portion is located closer to the outer space than the upper noncombustible layer, The recess is located closer to the outer space than the lower fireproof layer.

[0068] According to the configuration described in [6] above, a wall panel can be provided that can further prevent moisture from entering the interior space of a building.

[0069] [7] In some embodiments, in the configuration described in [6] above, The sealant is disposed in the recess.

[0070] According to the configuration described in [7] above, it is possible to suitably prevent moisture from entering the gap.

[0071] [8] In some embodiments, in the configuration described in any one of [1] to [7] above, Each of the lower second wood layer and the upper second wood layer is formed with a flame retardant portion (8) impregnated with a flame retardant (X) at least inside.

[0072] According to the configuration described in [8] above, the second lower wood layer and the second upper wood layer each have a flame-retardant portion, which improves the fire resistance of the wall panel.

[0073] [9] In some embodiments, in the configuration described in any one of [1] to [8] above, The joint portion is The building further includes a weight-bearing member (50) having a support portion (52) that supports the upper wall panel from below, the support portion including a protrusion (53) that protrudes into the interior space of the building, and an extension portion (54) that extends upward from the protrusion.

[0074] According to the configuration described in [9] above, for example, the weight-receiving member can be connected to the pillars or floor of a building, and the load of the wall panel can be transmitted to the pillars or floor of the building.

[0075]

[10] In some embodiments, in the configuration described in [9] above, The upper wall panel has a hole (21) formed in the lower surface of the upper wall panel that is recessed upward from a portion of the lower surface of the upper wall panel that is closer to the outer space than the upper noncombustible layer, The weight-receiving member further includes an insert portion (56) extending upward from the support portion and inserted into the hole portion.

[0076] According to the configuration described in

[10] above, it is possible to prevent the upper first wood layer and the wall panel itself from falling off.

[0077]

[11] In some embodiments, in the configuration described in

[10] above, The water-stopping material includes a first water-stopping portion (31) and a second water-stopping portion (33) that are spaced apart from each other along the width direction (D3) of the wall panel, The support portion of the weight-receiving member is disposed between the first water-stopping portion and the second water-stopping portion.

[0078] According to the configuration described in

[11] above, it is possible to provide a wall panel having a compactly designed joint portion. [Explanation of symbols]

[0079] 1 wall panel 2 Lower wall panels 4 Upper wall panels 5 Underside of upper wall panel 6 Joint 7 Upper surface of lower wall panel 7a First surface (second embodiment) 7b Second surface (second embodiment) 7c Step surface (second embodiment) 8 Flame retardant section 10 Lower first woody layer 12 Lower second woody layer 14 Lower noncombustible layer 20 Upper first woody layer 22 Upper second woody layer 21 Hole 24 Upper fireproof layer 29 Guide surface 30 Water-stopping material 31 First water stop section 32 Cover member 33 Second water stop section 34 Sealant 35a One end of the cover member 35b other end of cover member 36 Drainage pipe 36a Connection 36b Downward extension 37 Drainage channel 38 Thermal expansion material 39 Drain pipe outlet 40 Gap 41 Opening to the inner space of the gap 43 Opening of gap to outer space 42 Upper surface of cover member 48 Horizontal part 49 Lower part 50 Weight-bearing member 52 Support part 53 Protrusion 54 Extension 56 Insertion section 60 Convex part 62 recess 100 Exterior Wall 100A First exterior wall 100B Second outer wall 102 Roof 104 beds 106 Inner wall surface 108 Exterior wall 110 Inner wall 112 Beam 200 buildings 201 Inner Space 203 Outside space A droplet D1 Vertical direction D2 thickness direction D3 Width direction G ground M Noncombustible material W wood X flame retardant

Claims

1. A wall panel for constituting a non-load-bearing wall of a building, a plate-shaped lower wall panel including a lower first wood layer that is arranged facing the exterior space of the building and includes wood; a lower second wood layer that is arranged on the opposite side of the exterior space across the lower first wood layer and includes wood; and a lower non-combustible layer that is arranged between the lower first wood layer and the lower second wood layer and is made of a non-combustible material; an upper wall panel in the form of a plate, the upper wall panel being an upper first wood layer that is arranged above the lower wall panel and that includes wood; an upper second wood layer that is arranged on the opposite side of the outer space across the upper first wood layer and that includes wood; and an upper non-combustible layer that is arranged between the upper first wood layer and the upper second wood layer and that is made of a non-combustible material; a joint portion formed between the lower wall panel and the upper wall panel, The joint portion is A water-stopping material arranged in contact with the upper second wood material; a cover member located below the water stopping material, the cover member extending from one end located on the opposite side of the outer space side from the outer space side of the surface of the water stopping material to the outer space side beyond the upper noncombustible layer and the lower noncombustible layer, Wall panel.

2. The joint portion is a sealing material disposed closer to the outer space than the water-stopping material; The sealing material may further include a drainage pipe connected to the sealing material, the drainage pipe having a drainage flow path formed therein, the drainage flow path including an outlet opening downward to the outer space. The wall panel of claim 1 .

3. The joint portion is Further including a thermal expansion material disposed above the cover member.

3. A wall panel according to claim 1 or 2.

4. The cover member is a waterproof tape or a steel plate.

3. A wall panel according to claim 1 or 2.

5. the upper wall panel includes a protrusion that protrudes downward from a lower surface of the upper wall panel and faces the outer space, The lower wall panel includes a recess that is recessed downward from an upper surface of the lower wall panel, into which the protrusion is inserted, and that is open to the outer space.

3. The wall panel of claim 2.

6. The convex portion is located closer to the outer space than the upper noncombustible layer, The recess is located closer to the outer space than the lower fireproof layer.

6. The wall panel of claim 5.

7. The sealing material is disposed in the recess.

7. The wall panel of claim 6.

8. Each of the lower second wood layer and the upper second wood layer has a flame-retardant portion impregnated with a flame retardant at least inside.

3. A wall panel according to claim 1 or 2.

9. The joint portion is a weight-bearing member that supports the upper wall panel from below, the weight-bearing member including a protrusion that protrudes into the interior space of the building and an extension that extends upward from the protrusion; 3. A wall panel according to claim 1 or 2.

10. The upper wall panel has a hole formed in a lower surface of the upper wall panel that is recessed upward from a portion of the lower surface of the upper wall panel that is closer to the outer space than the upper fireproof layer, The weight-receiving member further includes an insertion portion extending upward from the support portion and inserted into the hole portion.

10. The wall panel of claim 9.

11. The water-stopping material includes a first water-stopping portion and a second water-stopping portion that are arranged at an interval along the width direction of the wall panel, The support portion of the weight-receiving member is disposed between the first water-stopping portion and the second water-stopping portion.

11. The wall panel of claim 10.

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