JP7498590B2

JP7498590B2 - Panel unit

Info

Publication number: JP7498590B2
Application number: JP2020077746A
Authority: JP
Inventors: 康友茶木; 誠司藤原
Original assignee: Nippon Steel Coated Sheet Corp
Current assignee: Nippon Steel Coated Sheet Corp
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2024-06-12
Anticipated expiration: 2040-04-24
Also published as: JP2021173060A

Description

本開示は、パネルユニットに関する。より詳細には、第１耐火パネルと第２耐火パネルとを備えるパネルユニットに関する。 The present disclosure relates to a panel unit. More specifically, the present disclosure relates to a panel unit having a first fire-resistant panel and a second fire-resistant panel.

特許文献１には、上下方向に隣接する耐火パネル同士を連結したパネルユニットが開示されている。各耐火パネルは、二枚の金属外皮の間に芯材を有するサンドイッチパネルで形成されている。また各耐火パネルは連結板を有している。連結板は二枚の金属外皮を連結するものであり、耐火パネルが火災等で高温に曝されて変形しても、二枚の金属外皮の連結が連結板によって維持しやすくなる。したがって、パネルユニットは、金属外皮の脱落が抑制される、という効果を有する。 Patent Document 1 discloses a panel unit in which vertically adjacent fireproof panels are connected to each other. Each fireproof panel is formed of a sandwich panel having a core material between two metal skins. Each fireproof panel also has a connecting plate. The connecting plate connects the two metal skins, and even if the fireproof panel is exposed to high temperatures due to a fire or the like and deforms, the connection between the two metal skins is easily maintained by the connecting plate. Therefore, the panel unit has the effect of suppressing the falling off of the metal skins.

特開２０１８－８７４２４号公報JP 2018-87424 A

特許文献１に記載されたパネルユニットでは、上側の耐火パネルと、下側の耐火パネルとが、あいじゃくり加工により接続されているため、上側の耐火パネルの下面及び下側の耐火パネルの上面には連結板が設けられていなかった。そこで、耐火性能の向上のために、連結板の個数を増やして、二枚の金属外皮の連結性能を高めることが望まれていた。 In the panel unit described in Patent Document 1, the upper fire-resistant panel and the lower fire-resistant panel are connected by a joint process, so no connecting plates are provided on the underside of the upper fire-resistant panel or on the top side of the lower fire-resistant panel. Therefore, in order to improve the fire resistance performance, it is desirable to increase the number of connecting plates and improve the connection performance of the two metal skins.

本開示は、二枚の金属外皮を備えた耐火パネルを使用し、二枚の金属外皮の連結性能を高めることができるパネルユニットを提供することを目的とする。 The present disclosure aims to provide a panel unit that uses a fire-resistant panel with two metal skins and can improve the connection performance of the two metal skins.

本開示の一態様に係るパネルユニットは、第１耐火パネルと第２耐火パネルとを備える。前記第１耐火パネル及び前記第２耐火パネルは、各々、二枚の金属外皮の間に芯材を有する。前記第１耐火パネルの端面は、前記第２耐火パネルの端面と対向して配置される。前記第１耐火パネルは、前記第１耐火パネルの前記端面に前記第１耐火パネルの前記二枚の金属外皮を連結する連結部材を有する。前記第２耐火パネルは、前記第２耐火パネルの前記端面に凹んだ凹部を有する。前記連結部材と前記凹部とは対向する位置にある。 A panel unit according to one aspect of the present disclosure includes a first fire-resistant panel and a second fire-resistant panel. The first fire-resistant panel and the second fire-resistant panel each have a core material between two metal skins. An end face of the first fire-resistant panel is disposed opposite an end face of the second fire-resistant panel. The first fire-resistant panel has a connecting member that connects the two metal skins of the first fire-resistant panel to the end face of the first fire-resistant panel. The second fire-resistant panel has a recessed recess in the end face of the second fire-resistant panel. The connecting member and the recess are located opposite each other.

本開示によれば、二枚の金属外皮を備えた耐火パネルを使用したパネルユニットにおいて、第１耐火パネルと第２耐火パネルとの対向する端面に、連結部材を設けることができ、二枚の金属外皮の連結性能を高めることができる、という利点がある。 According to the present disclosure, in a panel unit using a fireproof panel with two metal skins, a connecting member can be provided on the opposing end faces of the first fireproof panel and the second fireproof panel, which has the advantage of improving the connection performance of the two metal skins.

図１Ａは、本実施例に係るパネルユニットの一実施形態を示す分解斜視図である。図１Ｂは、同上の耐火材を示す斜視図である。Fig. 1A is an exploded perspective view showing one embodiment of a panel unit according to the present invention, and Fig. 1B is a perspective view showing a fireproof material of the same. 図２Ａは、同上の一実施形態を示す断面図である。図２Ｂは、同上の一実施形態を示す側面図である。2A and 2B are cross-sectional and side views showing the embodiment of the same; 図３は、同上の一実施形態を示す斜視図である。FIG. 3 is a perspective view showing one embodiment of the above. 図４Ａは、同上の一実施形態を示す下面図である。図４Ｂは、同上の一実施形態を示す上面図である。4A and 4B are bottom and top views showing the embodiment of the same;

（実施形態）
（１）概要
図１に示すように、本実施形態に係るパネルユニット１は、第１耐火パネル２１と第２耐火パネル２２とを備えている。第１耐火パネル２１及び第２耐火パネル２２は、各々、二枚の金属外皮３の間に芯材４を有している。第１耐火パネル２１は端面２１１に二枚の金属外皮３を連結する連結部材５を有している。第２耐火パネル２２は端面２２２に凹んだ凹部６を有している。第１耐火パネル２１が有する連結部材５と、第２耐火パネル２２が有する凹部６とは、対向する位置にある。 (Embodiment)
(1) Overview As shown in Fig. 1, the panel unit 1 according to this embodiment includes a first fireproof panel 21 and a second fireproof panel 22. The first fireproof panel 21 and the second fireproof panel 22 each have a core material 4 between two metal skins 3. The first fireproof panel 21 has a connecting member 5 that connects the two metal skins 3 at an end face 211. The second fireproof panel 22 has a recessed portion 6 recessed at an end face 222. The connecting member 5 of the first fireproof panel 21 and the recessed portion 6 of the second fireproof panel 22 are located opposite each other.

本実施形態では、第１耐火パネル２１の端面２１１と、第２耐火パネル２２の端面２２２とを、突付けて配置した場合に、端面２１１に設けた連結部材５を端面２２２に凹んだ凹部６に収容させることができる。したがって、第１耐火パネル２１と第２耐火パネル２２との間に、連結部材５に起因する隙間が生じにくくなる。よって、火炎、煙、熱気が第１耐火パネル２１と第２耐火パネル２２との間の隙間を通過しにくくなり、パネルユニット１の耐火性を向上させることができる。また本実施形態では、連結部材５が端面２２２と対向して配置される端面２１１に設けられており、この連結部材５により二枚の金属外皮３が連結されている。したがって、従来では、連結部材５が設けられていなかった端面２１１においても二枚の金属外皮３を連結部材５で連結することができ、二枚の金属外皮３の連結性能を高めることができる。 In this embodiment, when the end surface 211 of the first fireproof panel 21 and the end surface 222 of the second fireproof panel 22 are arranged in abutting relation to each other, the connecting member 5 provided on the end surface 211 can be accommodated in the recess 6 recessed in the end surface 222. Therefore, a gap caused by the connecting member 5 is unlikely to occur between the first fireproof panel 21 and the second fireproof panel 22. Therefore, flames, smoke, and hot air are unlikely to pass through the gap between the first fireproof panel 21 and the second fireproof panel 22, and the fire resistance of the panel unit 1 can be improved. In this embodiment, the connecting member 5 is provided on the end surface 211 arranged opposite the end surface 222, and the two metal skins 3 are connected by this connecting member 5. Therefore, the two metal skins 3 can be connected by the connecting member 5 even on the end surface 211 where the connecting member 5 was not provided in the past, and the connection performance of the two metal skins 3 can be improved.

なお、本実施形態に係るパネルユニット１は、ビル等の大型建物の外壁となるカーテンウォールに用いられることが好ましく、特にこのカーテンウォールが備えるスパンドレル部に用いられることが好ましい。 The panel unit 1 according to this embodiment is preferably used for curtain walls that form the exterior walls of large buildings such as buildings, and is particularly preferably used for the spandrel parts of these curtain walls.

（２）詳細
（第１耐火パネル２１及び第２耐火パネル２２）
図１Ａに示すように、本実施形態に係るパネルユニット１は、第１耐火パネル２１と第２耐火パネル２２とを備える。第１耐火パネル２１と第２耐火パネル２２とは同一形状の耐火パネル２を使用することができる。耐火パネル２は正面視で四角形に形成されている。ここで、正面視とは、厚み方向Ｄ３から耐火パネル２を見た場合を言う。なお、パネルユニット１が建物に設置された状態で、一方向Ｄ１は建物の上下方向として規定され、交差方向Ｄ２は建物の左右方向として規定される。この場合、上下方向Ｄ１は、左右方向Ｄ２と直交してもよい。また、耐火パネル２の厚み方向Ｄ３は、上下方向Ｄ１及び左右方向Ｄ２と直交していてもよい。なお、上下方向Ｄ１、左右方向Ｄ２、及び厚み方向Ｄ３を、それぞれ第１方向、第２方向、及び第３方向としてもよい。 (2) Details (First fire-resistant panel 21 and second fire-resistant panel 22)
As shown in FIG. 1A, the panel unit 1 according to the present embodiment includes a first fireproof panel 21 and a second fireproof panel 22. The first fireproof panel 21 and the second fireproof panel 22 can use fireproof panels 2 of the same shape. The fireproof panel 2 is formed in a rectangular shape when viewed from the front. Here, the front view refers to the case where the fireproof panel 2 is viewed from the thickness direction D3. In addition, when the panel unit 1 is installed in a building, one direction D1 is defined as the up-down direction of the building, and the cross direction D2 is defined as the left-right direction of the building. In this case, the up-down direction D1 may be perpendicular to the left-right direction D2. In addition, the thickness direction D3 of the fireproof panel 2 may be perpendicular to the up-down direction D1 and the left-right direction D2. In addition, the up-down direction D1, the left-right direction D2, and the thickness direction D3 may be the first direction, the second direction, and the third direction, respectively.

耐火パネル２はサンドイッチパネルであって、二枚の金属外皮３の間に芯材４を有する。すなわち、第１耐火パネル２１及び第２耐火パネル２２は、各々、二枚の金属外皮３の間に芯材４を有する。 The fire-resistant panel 2 is a sandwich panel having a core material 4 between two metal skins 3. That is, the first fire-resistant panel 21 and the second fire-resistant panel 22 each have a core material 4 between two metal skins 3.

図２Ｂに示すように、二枚の金属外皮３は第１金属外皮３１及び第２金属外皮３２を有している。第１金属外皮３１及び第２金属外皮３２は、金属板をロール成形などで加工することによって形成される。金属板としては、亜鉛めっき鋼板、ガルバリウム鋼板（登録商標）、エスジーエル(登録商標)鋼板、塗装鋼板などが用いられる。第１金属外皮３１及び第２金属外皮３２の板厚は、例えば、０．３～１．５ｍｍである。 As shown in FIG. 2B, the two metal skins 3 have a first metal skin 31 and a second metal skin 32. The first metal skin 31 and the second metal skin 32 are formed by processing a metal plate by roll forming or the like. As the metal plate, a zinc-plated steel plate, a Galvalume steel plate (registered trademark), an SGL (registered trademark) steel plate, a painted steel plate, or the like is used. The plate thickness of the first metal skin 31 and the second metal skin 32 is, for example, 0.3 to 1.5 mm.

第１金属外皮３１は、パネルユニット１が建物に設置された状態で、芯材４よりも屋外側にある。第２金属外皮３２は、芯材４よりも屋内側にある。そして、第１金属外皮３１と第２金属外皮３２との間に芯材４がある。すなわち、芯材４は、耐火パネル２の端面（上端面、下端面及び側端面）を除いて第１金属外皮３１と第２金属外皮３２とに覆われている。 When the panel unit 1 is installed in a building, the first metal skin 31 is located on the outdoor side of the core material 4. The second metal skin 32 is located on the indoor side of the core material 4. The core material 4 is located between the first metal skin 31 and the second metal skin 32. In other words, the core material 4 is covered by the first metal skin 31 and the second metal skin 32 except for the end faces (upper end face, lower end face, and side end faces) of the fire-resistant panel 2.

図２Ａに示すように、芯材４は、断熱材４２と耐火材４１の組み合わせで構成される。断熱材４２は、ロックウール、グラスウールなどの繊維状無機材をバインダーなどで固めて形成したブロック体を、複数並べて、全体形状が板状となるように配置したものである。耐火材４１は、断熱材４２に比べて耐火性の高い部材であり、例えば、石膏ボード、珪酸カルシウムボードなどである。耐火材４１と断熱材４２とは材質が異なり、耐火材４１は断熱材４２よりも密度が高くて硬いが、耐火材４１は断熱材４２よりも燃えにくく、耐火性能が高い。 As shown in FIG. 2A, the core material 4 is composed of a combination of an insulating material 42 and a fireproof material 41. The insulating material 42 is a block formed by solidifying fibrous inorganic materials such as rock wool and glass wool with a binder or the like, and is arranged so that the overall shape is a plate. The fireproof material 41 is a member with higher fire resistance than the insulating material 42, such as gypsum board or calcium silicate board. The fireproof material 41 and the insulating material 42 are made of different materials, and the fireproof material 41 is denser and harder than the insulating material 42, but the fireproof material 41 is less flammable than the insulating material 42 and has higher fire resistance.

耐火材４１は、芯材４の屋内側の部分を構成する耐火材本体４１ａと、芯材４の上端部にある第１耐火材４１ｂと、芯材４の下端部にある第２耐火材４１ｃとを備える。断熱材４２は、芯材４の屋外側の部分を構成する。厚み方向Ｄ３において、耐火材本体４１ａと断熱材４２とが並んでいる。耐火材本体４１ａは芯材４の厚みのおよそ三分の一であり、断熱材４２は芯材４の厚みのおよそ三分の二である。芯材４は、左右方向Ｄ２に亘って材質が一定である。すなわち、芯材４は、左右方向Ｄ２に亘って、断熱材４２と、耐火材本体４１ａと、第１耐火材４１ｂと、第２耐火材４１ｃとを有する。つまり、芯材４は、第２耐火パネル２２の端面２２２に沿って延びる耐火材４１を含む。 The fireproof material 41 includes a fireproof material body 41a constituting the indoor side portion of the core material 4, a first fireproof material 41b at the upper end of the core material 4, and a second fireproof material 41c at the lower end of the core material 4. The heat insulating material 42 constitutes the outdoor side portion of the core material 4. The fireproof material body 41a and the heat insulating material 42 are arranged side by side in the thickness direction D3. The fireproof material body 41a is approximately one third of the thickness of the core material 4, and the heat insulating material 42 is approximately two thirds of the thickness of the core material 4. The material of the core material 4 is constant across the left-right direction D2. That is, the core material 4 has the heat insulating material 42, the fireproof material body 41a, the first fireproof material 41b, and the second fireproof material 41c across the left-right direction D2. That is, the core material 4 includes the fireproof material 41 extending along the end surface 222 of the second fireproof panel 22.

正面視で四角形の耐火パネル２は、上端面である端面２２２、下端面である端面２１１及び側端面２３を有している。したがって、第２耐火パネル２２の端面２２２は上端面である。第１耐火パネル２１の端面２１１は、下端面である。端面２２２、端面２１１及び側端面２３は、各々、略平坦面である。ここでいう「略平坦面」とは、平坦な面と、多少の凹凸を有している平坦な面とを含む。 The fire-resistant panel 2, which is rectangular when viewed from the front, has an end face 222 which is the upper end face, an end face 211 which is the lower end face, and a side end face 23. Thus, the end face 222 of the second fire-resistant panel 22 is the upper end face. The end face 211 of the first fire-resistant panel 21 is the lower end face. The end face 222, the end face 211, and the side end face 23 are each substantially flat surfaces. Here, "substantially flat surfaces" includes flat surfaces and flat surfaces with some irregularities.

本実施形態では、耐火パネル２の端面（下端面）２１１は、図４Ｂに示すように、後述の第１下片部３１ｂ及び第２下片部３２ｂの各々と、芯材４の第２耐火材４１ｃとの間に、段差を有している。この段差は、第１下片部３１ｂ及び第２下片部３２ｂの各々の厚み（Ｄ１方向の寸法）とほぼ同じである。また同様に、耐火パネル２の端面（上端面）２２２は、図４Ａに示すように、後述の第１上片部３１ｃ及び第２上片部３２ｃの各々と、芯材４の第１耐火材４１ｂとの間に、段差を有している。この段差は、第１上片部３１ｃ及び第２上片部３２ｃの各々の厚み（Ｄ１方向の寸法）とほぼ同じである。また同様に、耐火パネル２の側端面２３は、後述の第１側片部３１ｄ及び第２側片部３２ｄの各々と、芯材４の側端面との間に、段差を有している。この段差は、第１側片部３１ｄ及び第２側片部３２ｄの各々の厚み（Ｄ２方向の寸法）とほぼ同じである。 In this embodiment, as shown in FIG. 4B, the end surface (lower end surface) 211 of the fireproof panel 2 has a step between each of the first lower piece portion 31b and the second lower piece portion 32b described below and the second fireproof material 41c of the core material 4. This step is approximately the same as the thickness (dimension in the D1 direction) of each of the first lower piece portion 31b and the second lower piece portion 32b. Similarly, as shown in FIG. 4A, the end surface (upper end surface) 222 of the fireproof panel 2 has a step between each of the first upper piece portion 31c and the second upper piece portion 32c described below and the first fireproof material 41b of the core material 4. This step is approximately the same as the thickness (dimension in the D1 direction) of each of the first upper piece portion 31c and the second upper piece portion 32c described below. Similarly, the side end surface 23 of the fireproof panel 2 has a step between each of the first side piece 31d and the second side piece 32d described below and the side end surface of the core material 4. This step is approximately the same as the thickness (dimension in the D2 direction) of each of the first side piece 31d and the second side piece 32d.

図１Ａに示すように、耐火パネル２の第１金属外皮３１は、芯材４の屋外側の面に取り付けられる第１本体部３１ａと、第１本体部３１ａの下端から屋内側に延びる第１下片部３１ｂとを備える。耐火パネル２の第２金属外皮３２は、芯材４の屋内側の面に取り付けられる第２本体部３２ａと、第２本体部３２ａの下端から屋外側に延びる第２下片部３２ｂとを備える。そして、第１下片部３１ｂと第２下片部３２ｂとは連結部材５により連結される。第１金属外皮３１と第２金属外皮３２とを連結するにあたっては、第１下片部３１ｂ及び第２下片部３２ｂの各々と連結部材５とが重なる位置で固定具５２が上下方向Ｄ１で第２耐火材４１ｃに向かって打ち込まれる。 As shown in FIG. 1A, the first metal skin 31 of the fireproof panel 2 includes a first main body 31a attached to the outdoor surface of the core material 4, and a first lower piece 31b extending from the lower end of the first main body 31a to the indoor side. The second metal skin 32 of the fireproof panel 2 includes a second main body 32a attached to the indoor surface of the core material 4, and a second lower piece 32b extending from the lower end of the second main body 32a to the outdoor side. The first lower piece 31b and the second lower piece 32b are connected by a connecting member 5. When connecting the first metal skin 31 and the second metal skin 32, the fasteners 52 are driven in the vertical direction D1 toward the second fireproof material 41c at positions where the first lower piece 31b and the second lower piece 32b overlap with the connecting member 5.

また第１金属外皮３１は、第１本体部３１ａの上端から屋内側に延びる第１上片部３１ｃを更に備える。第２金属外皮３２は、第２本体部３２ａの上端から屋外側に延びる第２上片部３２ｃを更に備える。そして、第１上片部３１ｃ及び第２上片部３２ｃは連結部材５により連結される。第１金属外皮３１と第２金属外皮３２とを連結するにあたっては、第１上片部３１ｃ及び第２上片部３２ｃの各々と連結部材５とが重なる位置で固定具５２が上下方向Ｄ１で第１耐火材４１ｂに向かって打ち込まれる。 The first metal skin 31 further includes a first upper piece 31c extending from the upper end of the first main body 31a toward the indoor side. The second metal skin 32 further includes a second upper piece 32c extending from the upper end of the second main body 32a toward the outdoor side. The first upper piece 31c and the second upper piece 32c are connected by a connecting member 5. When connecting the first metal skin 31 and the second metal skin 32, fasteners 52 are driven in the vertical direction D1 toward the first fireproof material 41b at positions where the first upper piece 31c and the second upper piece 32c overlap with the connecting member 5.

また第１金属外皮３１は第１側片部３１ｄを更に備え、第２金属外皮３２は第２側片部３２ｄを更に備える。第１側片部３１ｄは、第１本体部３１ａの側端から屋内側に延びる部分である。第２側片部３２ｄは、第２本体部３２ａの側端から屋外側に延びる部分である。そして、第１側片部３１ｄ及び第２側片部３２ｄは連結部材５により連結される。第１金属外皮３１と第２金属外皮３２とを連結するにあたっては、第１側片部３１ｄ及び第２側片部３２ｄの各々と連結部材５とが重なる位置で固定具５１が左右方向Ｄ２で芯材４に向かって打ち込まれる。 The first metal skin 31 further includes a first side piece 31d, and the second metal skin 32 further includes a second side piece 32d. The first side piece 31d is a portion that extends from the side end of the first main body 31a to the indoor side. The second side piece 32d is a portion that extends from the side end of the second main body 32a to the outdoor side. The first side piece 31d and the second side piece 32d are connected by a connecting member 5. When connecting the first metal skin 31 and the second metal skin 32, the fasteners 51 are driven in the left-right direction D2 toward the core material 4 at positions where the first side piece 31d and the second side piece 32d overlap with the connecting member 5.

耐火パネル２は、連結部材５を備える。連結部材５は、耐火パネル２に複数設けられている。連結部材５は、図２Ｂに示すように、各耐火パネル２の側端面２３において、第１金属外皮３１と第２金属外皮３２とを連結する板状の部材である。すなわち、第１耐火パネル２１は、第１耐火パネル２１の端面２１１に第１耐火パネル２１の二枚の金属外皮３を連結する連結部材５を有する。このような連結部材５と第１金属外皮３１及び第２金属外皮３２の各々と重なる位置で固定具５１が左右方向Ｄ２で芯材４に向かって打ち込まれている。また連結部材５は、各耐火パネル２の端面（上端面）２２２及び端面（下端面）２１１において、第１金属外皮３１と第２金属外皮３２とを連結する板状の部材である。このような連結部材５と第１金属外皮３１及び第２金属外皮３２の各々と重なる位置で固定具５２が上下方向Ｄ１で芯材４に向かって打ち込まれている。 The fireproof panel 2 includes a connecting member 5. A plurality of connecting members 5 are provided on the fireproof panel 2. As shown in FIG. 2B, the connecting member 5 is a plate-shaped member that connects the first metal skin 31 and the second metal skin 32 at the side end surface 23 of each fireproof panel 2. That is, the first fireproof panel 21 has a connecting member 5 that connects the two metal skins 3 of the first fireproof panel 21 to the end surface 211 of the first fireproof panel 21. The fasteners 51 are driven toward the core material 4 in the left-right direction D2 at positions where the connecting member 5 overlaps with each of the first metal skin 31 and the second metal skin 32. The connecting member 5 is also a plate-shaped member that connects the first metal skin 31 and the second metal skin 32 at the end surface (upper end surface) 222 and the end surface (lower end surface) 211 of each fireproof panel 2. The fasteners 52 are driven into the core material 4 in the vertical direction D1 at positions where the connecting member 5 overlaps with each of the first metal skin 31 and the second metal skin 32.

図４Ａ及び図４Ｂに示すように、耐火パネル２は、段差緩和部２５を更に備える。段差緩和部２５は、上下方向Ｄ１における耐火パネル２の両端に設けられている。具体的には、耐火パネル２の上端面（端面２２２）では、耐火パネル２の側端部から左右方向Ｄ２に沿って、段差緩和部２５と連結部材５とがこの順で交互に並んで複数ずつ設けられ、耐火パネル２の下端面（端面２１１）では、耐火パネル２の側端部から左右方向Ｄ２に沿って、連結部材５と段差緩和部２５とがこの順で交互に並んで複数ずつ設けられている。 As shown in Figs. 4A and 4B, the fireproof panel 2 further includes a step mitigating portion 25. The step mitigating portion 25 is provided at both ends of the fireproof panel 2 in the up-down direction D1. Specifically, on the upper end surface (end surface 222) of the fireproof panel 2, a plurality of step mitigating portions 25 and connecting members 5 are provided alternately in this order from the side end of the fireproof panel 2 along the left-right direction D2, and on the lower end surface (end surface 211) of the fireproof panel 2, a plurality of connecting members 5 and step mitigating portions 25 are provided alternately in this order from the side end of the fireproof panel 2 along the left-right direction D2.

段差緩和部２５は、第１金属外皮３１の第１上片部３１ｃを屋外側に切り欠くと共に、第２金属外皮３２の第２上片部３２ｃを屋内側に切り欠くようにして形成されている。耐火パネル２の上端面にある段差緩和部２５は、上下方向Ｄ１において、耐火パネル２の下端面にある連結部材５と重なる位置に設けられている。また、耐火パネル２の下端面にある段差緩和部２５は、上下方向Ｄ１において、耐火パネル２の上端面にある連結部材５と重なる位置に設けられている。また、上下方向Ｄ１で見た耐火パネル２の平面視において、段差緩和部２５は、連結部材５よりも大きい。また、段差緩和部２５は、上下方向Ｄ１に深さを有する。段差緩和部２５の深さは、第１及び第２金属外皮２１、２２の厚みと同じである。なお、段差緩和部２５の深さと、後述の凹部６の深さの合計は、連結部材５の厚さと、固定具５１の頭部の厚さの合計よりも大きいことが好ましい。 The step mitigating portion 25 is formed by cutting out the first upper piece portion 31c of the first metal skin 31 on the outdoor side and cutting out the second upper piece portion 32c of the second metal skin 32 on the indoor side. The step mitigating portion 25 on the upper end surface of the fireproof panel 2 is provided at a position overlapping the connecting member 5 on the lower end surface of the fireproof panel 2 in the vertical direction D1. The step mitigating portion 25 on the lower end surface of the fireproof panel 2 is provided at a position overlapping the connecting member 5 on the upper end surface of the fireproof panel 2 in the vertical direction D1. In addition, in a plan view of the fireproof panel 2 seen in the vertical direction D1, the step mitigating portion 25 is larger than the connecting member 5. In addition, the step mitigating portion 25 has a depth in the vertical direction D1. The depth of the step mitigating portion 25 is the same as the thickness of the first and second metal skins 21 and 22. It is preferable that the sum of the depth of the step reduction portion 25 and the depth of the recess 6 described below is greater than the sum of the thickness of the connecting member 5 and the thickness of the head of the fixing device 51.

芯材４の上端部にある第１耐火材４１ｂは、耐火パネル２の上端部に配置され、左右方向Ｄ２に沿って延びるように形成されている。図１Ｂに示すように、第１耐火材４１ｂは凹部６を有している。すなわち、凹部６は、芯材４に形成されている。また凹部６は、耐火材４１に形成されている。凹部６は第１耐火材４１ｂの上面（上下方向Ｄ１に沿った上向きの面）に開口している。また凹部６は第１耐火材４１ｂの厚み方向Ｄ３で並ぶ両面（屋外側を向く面と屋内側に向く面）に開口している。凹部６は第１耐火材４１ｂに複数形成されている。複数の凹部６は、左右方向Ｄ２に沿って所定の間隔を介して形成されている。第１耐火材４１ｂの凹部６は、耐火パネル２の上端面（端面２２２）に形成された段差緩和部２５に対応する位置にある。すなわち、第１耐火材４１ｂの凹部６と耐火パネル２の上端面の段差緩和部２５とは対向している。また第１耐火材４１ｂの凹部６と耐火パネル２の上端面の段差緩和部２５とは繋がっている。すなわち、耐火パネル２の上方から上端面の段差緩和部２５を通って第１耐火材４１ｂの凹部６にまで到達できる。したがって、第２耐火パネル２２は、第２耐火パネル２２の端面２２２に凹んだ凹部６を有する。 The first fireproof material 41b at the upper end of the core material 4 is disposed at the upper end of the fireproof panel 2 and is formed to extend along the left-right direction D2. As shown in FIG. 1B, the first fireproof material 41b has a recess 6. That is, the recess 6 is formed in the core material 4. The recess 6 is also formed in the fireproof material 41. The recess 6 is open on the upper surface (the surface facing upward along the vertical direction D1) of the first fireproof material 41b. The recess 6 is also open on both sides (the surface facing the outdoor side and the surface facing the indoor side) of the first fireproof material 41b arranged in the thickness direction D3. A plurality of recesses 6 are formed in the first fireproof material 41b. The plurality of recesses 6 are formed at predetermined intervals along the left-right direction D2. The recess 6 of the first fireproof material 41b is located at a position corresponding to the step mitigating portion 25 formed on the upper end surface (end surface 222) of the fireproof panel 2. That is, the recess 6 of the first fireproof material 41b and the step mitigating portion 25 of the upper end surface of the fireproof panel 2 face each other. In addition, the recess 6 of the first fireproof material 41b and the step reduction portion 25 on the upper end surface of the fireproof panel 2 are connected. That is, it is possible to reach the recess 6 of the first fireproof material 41b from above the fireproof panel 2 through the step reduction portion 25 on the upper end surface. Therefore, the second fireproof panel 22 has a recess 6 recessed in the end surface 222 of the second fireproof panel 22.

図１Ａに示すように、芯材４の下端部にある第２耐火材４１ｃは、耐火パネル２の下端部に配置され、左右方向Ｄ２に沿って延びるように形成されている。第２耐火材４１ｃは凹部６を有している。すなわち、凹部６は、芯材４に形成されている。また凹部６は、耐火材４１に形成されている。凹部６は第２耐火材４１ｃの下面（上下方向Ｄ１に沿った下向きの面）に開口している。また凹部６は第２耐火材４１ｃの厚み方向Ｄ３で並ぶ両面（屋外側を向く面と屋内側に向く面）に開口している。凹部６は第２耐火材４１ｃに複数形成されている。複数の凹部６は、左右方向Ｄ２に沿って所定の間隔を介して形成されている。第２耐火材４１ｃの凹部６は、耐火パネル２の下端面（端面２１１）に形成された段差緩和部２５に対応する位置にある。すなわち、第２耐火材４１ｃの凹部６と耐火パネル２の下端面の段差緩和部２５とは対向している。また第２耐火材４１ｃの凹部６と耐火パネル２の下端面の段差緩和部２５とは繋がっている。すなわち、耐火パネル２の下方から下端面の段差緩和部２５を通って第２耐火材４１ｃの凹部６にまで到達できる。 1A, the second fireproof material 41c at the lower end of the core material 4 is disposed at the lower end of the fireproof panel 2 and is formed to extend along the left-right direction D2. The second fireproof material 41c has a recess 6. That is, the recess 6 is formed in the core material 4. The recess 6 is also formed in the fireproof material 41. The recess 6 is open on the lower surface (the surface facing downward along the up-down direction D1) of the second fireproof material 41c. The recess 6 is also open on both sides (the surface facing the outdoor side and the surface facing the indoor side) of the second fireproof material 41c arranged in the thickness direction D3. A plurality of recesses 6 are formed in the second fireproof material 41c. The plurality of recesses 6 are formed at predetermined intervals along the left-right direction D2. The recess 6 of the second fireproof material 41c is located at a position corresponding to the step mitigating portion 25 formed on the lower end surface (end surface 211) of the fireproof panel 2. That is, the recess 6 of the second fireproof material 41c and the step mitigating portion 25 of the lower end surface of the fireproof panel 2 face each other. In addition, the recess 6 of the second fireproof material 41c and the step mitigating portion 25 on the lower end surface of the fireproof panel 2 are connected. In other words, it is possible to reach the recess 6 of the second fireproof material 41c from below the fireproof panel 2 through the step mitigating portion 25 on the lower end surface.

図４Ａ及び図４Ｂに示すように、凹部６は、段差緩和部２５に対応する位置に形成されているため、耐火パネル２の上端面（端面２２２）では、耐火パネル２の側端部から左右方向Ｄ２に沿って、凹部６と連結部材５とがこの順で交互に並んで複数ずつ設けられている。同様に、耐火パネル２の下端面（端面２１１）では、耐火パネル２の側端部から左右方向Ｄ２に沿って、連結部材５と凹部６とがこの順で交互に並んで複数ずつ設けられている。 As shown in Figures 4A and 4B, the recesses 6 are formed at positions corresponding to the step reduction portions 25, so that on the upper end surface (end surface 222) of the fire-resistant panel 2, multiple recesses 6 and connecting members 5 are provided alternately in this order from the side end of the fire-resistant panel 2 along the left-right direction D2. Similarly, on the lower end surface (end surface 211) of the fire-resistant panel 2, multiple connecting members 5 and recesses 6 are provided alternately in this order from the side end of the fire-resistant panel 2 along the left-right direction D2.

（パネルユニット）
本実施形態に係るパネルユニット１は、図１Ａ及び図３に示すように、第１耐火パネル２１と第２耐火パネル２２とを備えている。第１耐火パネル２１及び第２耐火パネル２２としては、上記耐火パネル２が使用される。すなわち、パネルユニット１は、複数の耐火パネル２を備えている。 (Panel unit)
1A and 3, the panel unit 1 according to this embodiment includes a first fire-resistant panel 21 and a second fire-resistant panel 22. The above-mentioned fire-resistant panel 2 is used as the first fire-resistant panel 21 and the second fire-resistant panel 22. That is, the panel unit 1 includes a plurality of fire-resistant panels 2.

図１に示すように、第１耐火パネル２１と第２耐火パネル２２とは、上下方向Ｄ１に沿って並べて配置されている。第１耐火パネル２１は、第２耐火パネル２２の上に配置されている。逆に言うと、第２耐火パネル２２は、第１耐火パネル２１の下に配置されている。この場合、第１耐火パネル２１の端面２１１は、第２耐火パネル２２の端面２２２と対向して配置される。すなわち、パネルユニット１において、第１耐火パネル２１の下端面である端面２１１と、第２耐火パネル２２の上端面である端面２２２とは対向している。 As shown in FIG. 1, the first fireproof panel 21 and the second fireproof panel 22 are arranged side by side in the vertical direction D1. The first fireproof panel 21 is arranged on top of the second fireproof panel 22. In other words, the second fireproof panel 22 is arranged below the first fireproof panel 21. In this case, the end face 211 of the first fireproof panel 21 is arranged opposite the end face 222 of the second fireproof panel 22. In other words, in the panel unit 1, the end face 211, which is the lower end face of the first fireproof panel 21, faces the end face 222, which is the upper end face of the second fireproof panel 22.

本実施形態のパネルユニット１において、第１耐火パネル２１と第２耐火パネル２２とは接続部材７により接続されている。この場合、第１耐火パネル２１と第２耐火パネル２２との接続強度が接続部材７により向上する。接続部材７は、第１耐火パネル２１の第２金属外皮３２の表面と、第２耐火パネル２２の第２金属外皮３２の表面とにわたって配置され、ビス等の固定具により、第１耐火パネル２１と第２耐火パネル２２との各々に固定される。 In the panel unit 1 of this embodiment, the first fireproof panel 21 and the second fireproof panel 22 are connected by a connecting member 7. In this case, the connection strength between the first fireproof panel 21 and the second fireproof panel 22 is improved by the connecting member 7. The connecting member 7 is disposed across the surface of the second metal outer skin 32 of the first fireproof panel 21 and the surface of the second metal outer skin 32 of the second fireproof panel 22, and is fixed to each of the first fireproof panel 21 and the second fireproof panel 22 by fasteners such as screws.

図４Ａ及び図４Ｂに示すように、本実施形態のパネルユニット１において、連結部材５と凹部６とは対向する位置にある。すなわち、第１耐火パネル２１の下端面（端面２１１）に設けた連結部材５は、第２耐火パネル２２の上端面（端面２２２）に凹むように設けた凹部６と対向するように配置される。連結部材５と凹部６とは、一対一で対応している。そして、第１耐火パネル２１の下端面（端面２１１）に設けた連結部材５は、第２耐火パネル２２の上端面（端面２２２）に設けた段差緩和部２５に嵌まり込む。また第１耐火パネル２１の下端面（端面２１１）に設けた連結部材５は、凹部６の上方又は凹部６内に位置するため、第２耐火パネル２２の芯材４（第１耐火材４１ｂ）には接触しにくい。したがって、第１耐火パネル２１と第２耐火パネル２２とを接続した際に、第１耐火パネル２１と第２耐火パネル２２との間の隙間を小さくできる。このため、パネルユニット１の耐火性能を向上させることができる。本実施形態では、上下方向Ｄ１において隣り合う耐火パネル２（第１耐火パネル２１と第２耐火パネル２２）の上端面と下端面とが接していることが好ましい。 4A and 4B, in the panel unit 1 of this embodiment, the connecting member 5 and the recess 6 are located opposite each other. That is, the connecting member 5 provided on the lower end surface (end surface 211) of the first fireproof panel 21 is arranged to face the recess 6 provided so as to be recessed in the upper end surface (end surface 222) of the second fireproof panel 22. The connecting member 5 and the recess 6 correspond one-to-one. The connecting member 5 provided on the lower end surface (end surface 211) of the first fireproof panel 21 fits into the step mitigation portion 25 provided on the upper end surface (end surface 222) of the second fireproof panel 22. In addition, the connecting member 5 provided on the lower end surface (end surface 211) of the first fireproof panel 21 is located above or within the recess 6, so it is unlikely to come into contact with the core material 4 (first fireproof material 41b) of the second fireproof panel 22. Therefore, when the first fireproof panel 21 and the second fireproof panel 22 are connected, the gap between the first fireproof panel 21 and the second fireproof panel 22 can be reduced. This improves the fireproof performance of the panel unit 1. In this embodiment, it is preferable that the upper end surface and the lower end surface of the fireproof panels 2 (the first fireproof panel 21 and the second fireproof panel 22) adjacent to each other in the vertical direction D1 are in contact with each other.

このように第１耐火パネル２１と第２耐火パネル２２との間に、大きな隙間が生じにくくなって、耐火性が向上する。例えば、上側の耐火パネルの下面と、下側の耐火パネルの上面との間に、大きな隙間があると、火炎、煙、熱気が隙間を通過しやすくなり、パネルユニットの耐火性が低くなる場合がある。上側の耐火パネルの下面及び下側の耐火パネルの上面に連結部材を設けると、連結部材が上側の耐火パネルの下面及び下側の耐火パネルの上面の間に存在することになり、これにより、上記隙間が生じることになる。したがって、特許文献１に記載されたパネルユニットでは、上側の耐火パネルの下面と、下側の耐火パネルの上面との間に、大きな隙間が生じにくいが、一方で、二枚の金属外皮の連結強度も向上させたいという要望もあった。 In this way, a large gap is unlikely to occur between the first fireproof panel 21 and the second fireproof panel 22, improving fire resistance. For example, if there is a large gap between the underside of the upper fireproof panel and the upper side of the lower fireproof panel, flames, smoke, and hot air may easily pass through the gap, which may reduce the fire resistance of the panel unit. If a connecting member is provided on the underside of the upper fireproof panel and the upper side of the lower fireproof panel, the connecting member will be present between the underside of the upper fireproof panel and the upper side of the lower fireproof panel, which will cause the above-mentioned gap to occur. Therefore, in the panel unit described in Patent Document 1, a large gap is unlikely to occur between the underside of the upper fireproof panel and the upper side of the lower fireproof panel, but at the same time, there was also a demand to improve the connection strength between the two metal skins.

本実施形態では、連結部材５が凹部６に収容されやすくなり、第１耐火パネル２１と第２耐火パネル２２との間に隙間が生じにくくなる。また連結部材５が芯材４に接触しにくくなり、第１耐火パネル２１と第２耐火パネル２２との間に隙間が生じにくくなり、また芯材４が破損しにくくなる。また芯材４が耐火材４１を含んでいても、第１耐火パネル２１と第２耐火パネル２２との間に隙間が生じにくくなる。 In this embodiment, the connecting member 5 is easily accommodated in the recess 6, making it difficult for a gap to form between the first fire-resistant panel 21 and the second fire-resistant panel 22. In addition, the connecting member 5 is less likely to come into contact with the core material 4, making it difficult for a gap to form between the first fire-resistant panel 21 and the second fire-resistant panel 22, and making the core material 4 less likely to be damaged. In addition, even if the core material 4 contains the fire-resistant material 41, it is difficult for a gap to form between the first fire-resistant panel 21 and the second fire-resistant panel 22.

（３）変形例
実施形態は、本開示の様々な実施形態の一つに過ぎない。実施形態は、本開示の目的を達成できれば、設計等に応じて種々の変更が可能である。 (3) Modifications The embodiment is merely one of various embodiments of the present disclosure. The embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

実施形態では、パネルユニット１は２つの耐火パネル２を備えていたが、これに限られず、パネルユニット１は３つ以上の耐火パネル２を備えていてもよい。 In the embodiment, the panel unit 1 has two fire-resistant panels 2, but this is not limited thereto, and the panel unit 1 may have three or more fire-resistant panels 2.

実施形態では、パネルユニット１は２つの耐火パネル２を上下方向に並べて接続していたが、これに限られず、パネルユニット１は２つ以上の耐火パネル２を左右方向に並べて接続してもよい。この場合、第１耐火パネル２１の側端面と第２耐火パネル２２の側端面とが突付けて配置される。 In the embodiment, the panel unit 1 connects two fireproof panels 2 arranged vertically, but this is not limited thereto, and the panel unit 1 may connect two or more fireproof panels 2 arranged horizontally. In this case, the side end face of the first fireproof panel 21 and the side end face of the second fireproof panel 22 are arranged so as to abut against each other.

実施形態では、第１耐火パネル２１と第２耐火パネル２２とが、同じ形状の耐火パネル２で構成されているが、これに限られない。例えば、第１耐火パネル２１と第２耐火パネル２２とは、形状、大きさが異なっていてもよいし、柄や模様などの表面化粧が異なっていてもよい。例えば、正面視で、三角形のパネルと、台形のパネルと、四角形のパネルとを組み合わせて、パネルユニットを形成してもよい。 In the embodiment, the first fire-resistant panel 21 and the second fire-resistant panel 22 are composed of fire-resistant panels 2 of the same shape, but this is not limited to the above. For example, the first fire-resistant panel 21 and the second fire-resistant panel 22 may be different in shape and size, and may have different surface decorations such as patterns and designs. For example, a panel unit may be formed by combining a triangular panel, a trapezoidal panel, and a rectangular panel when viewed from the front.

連結部材５の平面形状としては、例えば、円形、楕円形、並びに四角形及び六角形等の多角形が挙げられる。また、実施形態では、耐火パネル２の上端面及び下端面に使用する連結部材５と、耐火パネル２の側端面に使用する連結部材５との平面形状を異ならせたが、同じであってもよい。 Examples of the planar shape of the connecting member 5 include a circle, an ellipse, and a polygon such as a rectangle or a hexagon. In the embodiment, the planar shape of the connecting member 5 used on the upper and lower end faces of the fire-resistant panel 2 is different from that of the connecting member 5 used on the side end faces of the fire-resistant panel 2, but they may be the same.

（まとめ）
以上説明したように、第１の態様に係るパネルユニット（１）は、第１耐火パネル（２１）と第２耐火パネル（２２）とを備える。第１耐火パネル（２１）及び第２耐火パネル（２２）は、各々、二枚の金属外皮（３）の間に芯材（４）を有する。第１耐火パネル（２１）の端面（２１１）は、第２耐火パネル（２２）の端面（２２２）と対向して配置される。第１耐火パネル（２１）は、第１耐火パネル（２１）の端面（２１１）に第１耐火パネル（２１）の二枚の金属外皮（３）を連結する連結部材（５）を有する。第２耐火パネル（２２）は、第２耐火パネル（２２）の端面（２２２）に凹んだ凹部（６）を有する。連結部材（５）と凹部（６）とは対向する位置にある。 (summary)
As described above, the panel unit (1) according to the first embodiment includes a first fireproof panel (21) and a second fireproof panel (22). The first fireproof panel (21) and the second fireproof panel (22) each have a core material (4) between two metal skins (3). The end face (211) of the first fireproof panel (21) is disposed opposite to the end face (222) of the second fireproof panel (22). The first fireproof panel (21) has a connecting member (5) that connects the two metal skins (3) of the first fireproof panel (21) to the end face (211) of the first fireproof panel (21). The second fireproof panel (22) has a recess (6) recessed in the end face (222) of the second fireproof panel (22). The connecting member (5) and the recess (6) are located opposite to each other.

第１の態様によれば、連結部材（５）が、端面（２２２）と対向して配置される端面（２１１）に設けられており、この連結部材（５）により二枚の金属外皮（３）が連結されており、二枚の金属外皮（３）の連結性能を高めることができる、という利点がある。 According to the first aspect, the connecting member (5) is provided on the end face (211) that is arranged opposite the end face (222), and the two metal skins (3) are connected by this connecting member (5), which has the advantage of improving the connection performance of the two metal skins (3).

第２の態様は、第１の態様のパネルユニット（１）を含む。凹部（６）は、芯材（４）に形成されている。 The second aspect includes the panel unit (1) of the first aspect. The recess (6) is formed in the core material (4).

第２の態様によれば、連結部材（５）が芯材（４）に接触しにくくなり、第１耐火パネル（２１）と第２耐火パネル（２２）との間に隙間が生じにくくなり、また芯材（４）が破損しにくくなる、という利点がある。 The second aspect has the advantage that the connecting member (5) is less likely to come into contact with the core material (4), a gap is less likely to occur between the first fireproof panel (21) and the second fireproof panel (22), and the core material (4) is less likely to be damaged.

第３の態様は、第２の態様のパネルユニット（１）を含む。芯材（４）は、第２耐火パネル（２２）の端面（２２２）に沿って延びる耐火材（４１）を含む。凹部（６）は、耐火材（４１）に形成されている。 The third aspect includes the panel unit (1) of the second aspect. The core material (4) includes a fireproof material (41) that extends along the end surface (222) of the second fireproof panel (22). The recess (6) is formed in the fireproof material (41).

第３の態様によれば、芯材（４）が耐火材（４１）を含んでいても、第１耐火パネル（２１）と第２耐火パネル（２２）との間に隙間が生じにくくなる、という利点がある。 The third aspect has the advantage that even if the core material (4) contains a fireproof material (41), gaps are less likely to occur between the first fireproof panel (21) and the second fireproof panel (22).

第４の態様は、第１～３のいずれか１つの態様のパネルユニット（１）を含む。第１耐火パネル（２１）と第２耐火パネル（２２）とは、接続部材（７）により接続されている。 The fourth aspect includes a panel unit (1) according to any one of the first to third aspects. The first fireproof panel (21) and the second fireproof panel (22) are connected by a connecting member (7).

第４の態様によれば、第１耐火パネル（２１）と第２耐火パネル（２２）との接続強度が接続部材（７）により向上する、という利点がある。 The fourth aspect has the advantage that the connection strength between the first fire-resistant panel (21) and the second fire-resistant panel (22) is improved by the connection member (7).

第５の態様は、第１～４のいずれか１つの態様のパネルユニット（１）を含む。第１耐火パネル（２１）の端面（２１１）は、下端面である。第２耐火パネル（２２）の端面（２２２）は、上端面である。 The fifth aspect includes the panel unit (1) of any one of the first to fourth aspects. The end face (211) of the first fire-resistant panel (21) is the lower end face. The end face (222) of the second fire-resistant panel (22) is the upper end face.

第５の態様によれば、第１耐火パネル（２１）と第２耐火パネル（２２）とを上下方向に接続することができる、という利点がある。 The fifth aspect has the advantage that the first fireproof panel (21) and the second fireproof panel (22) can be connected in the vertical direction.

１パネルユニット
２１第１耐火パネル
２２第２耐火パネル
２１１端面
２２２端面
３金属外皮
４芯材
４１耐火材
５連結部材
６凹部
７接続部材 REFERENCE SIGNS LIST 1 Panel unit 21 First fireproof panel 22 Second fireproof panel 211 End surface 222 End surface 3 Metallic outer skin 4 Core material 41 Fireproof material 5 Connecting member 6 Recess 7 Connection member

Claims

A panel unit including a first fire-resistant panel and a second fire-resistant panel,
The first fire-resistant panel and the second fire-resistant panel each have a core material between two metal skins,
an end surface of the first fire-resistant panel is disposed opposite an end surface of the second fire-resistant panel;
The first fire-resistant panel has a connecting member that connects the two metal skins of the first fire-resistant panel to the end surface of the first fire-resistant panel, and a recess that is recessed into the end surface of the first fire-resistant panel ,
The second fire-resistant panel has a connecting member that connects the two metal skins of the second fire-resistant panel to the end surface of the second fire-resistant panel, and a recess that is recessed into the end surface of the second fire-resistant panel,
The connecting member of the first fire-resistant panel and the recess of the second fire-resistant panel are positioned opposite each other, and the connecting member of the second fire-resistant panel and the recess of the first fire-resistant panel are positioned opposite each other .
Panel unit.

The recess is formed in the core material.
The panel unit according to claim 1 .

the core material includes a fire-resistant material extending along the edge surface of the second fire-resistant panel;
The recess is formed in the fireproof material.
The panel unit according to claim 2 .

The first fire-resistant panel and the second fire-resistant panel are connected by a connecting member.
The panel unit according to any one of claims 1 to 3.

The end surface of the first fire-resistant panel is an upper end surface,
The end surface of the second fire-resistant panel is a lower end surface.
The panel unit according to any one of claims 1 to 4.