JP6941438B2 - External insulation structure and its construction method - Google Patents

External insulation structure and its construction method Download PDF

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JP6941438B2
JP6941438B2 JP2016254014A JP2016254014A JP6941438B2 JP 6941438 B2 JP6941438 B2 JP 6941438B2 JP 2016254014 A JP2016254014 A JP 2016254014A JP 2016254014 A JP2016254014 A JP 2016254014A JP 6941438 B2 JP6941438 B2 JP 6941438B2
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heat insulating
proof
layer
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大介 見澤
大介 見澤
龍志 富永
龍志 富永
章 清水
章 清水
石田 伸一
伸一 石田
伊知郎 中島
伊知郎 中島
正秀 橋口
正秀 橋口
清二 古野
清二 古野
田中 秀樹
秀樹 田中
池田 康二
康二 池田
一郎 石出
一郎 石出
喜一郎 林
喜一郎 林
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本発明は、建物躯体の外側に設けられた断熱層と、当該断熱層の外側に設けられた防湿層とを備えた外断熱構造及びその施工方法に関する。 The present invention relates to an external heat insulating structure provided with a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer, and a construction method thereof.

冷蔵・冷凍倉庫などの建物躯体の断熱構造として、建物躯体の外側に断熱層を敷設する外断熱構造が知られている。かかる外断熱構造では、水分を含む空気が断熱層側に浸入すると、内部結露等により断熱性が低下することが懸念される。そこで、断熱層の外側には防湿層が設けられており、この防湿層により断熱層側への水分を含む空気の浸入が防止されている(例えば特許文献1及び2を参照。)。
そして、従来の建物躯体の外断熱構造において、防湿層は、金属製板状の防湿板を、隣接間で互いに密着する状態で複数並設して構成されている。
As a heat insulating structure for a building frame such as a refrigerated / frozen warehouse, an external heat insulating structure in which a heat insulating layer is laid on the outside of the building frame is known. In such an external heat insulating structure, if air containing moisture invades the heat insulating layer side, there is a concern that the heat insulating property may be deteriorated due to internal dew condensation or the like. Therefore, a moisture-proof layer is provided on the outside of the heat-insulating layer, and the moisture-proof layer prevents air containing moisture from entering the heat-insulating layer (see, for example, Patent Documents 1 and 2).
Further, in the conventional external heat insulating structure of the building frame, the moisture-proof layer is formed by arranging a plurality of metal plate-shaped moisture-proof plates side by side in a state of being in close contact with each other.

特に、特許文献2に記載の外断熱構造は、断熱層として機能する断熱ボード(5A)と防湿層として機能する金属製板状の防湿板(5a)とを一体化してなる断熱防湿パネル(P)を、建物躯体(3)の外側に複数並設して構成されている。更に、この外断熱構造で利用される断熱防湿パネル(P)は、両端縁部がホゾ組形状に形成された断熱ボード(5A)の外表面に防湿板(5a)を積層し、その防湿板(5a)の端部を断熱ボード(5A)の厚肉内に折り返し埋設させる形態で構成されている。そして、このように構成された断熱防湿パネル(P)を建物躯体(3)の外側に複数並設するにあたり、断熱ボード(5A)のホゾ溝(7)に対して隣接する断熱ボード(5A)のホゾ(8)が嵌合されることで、双方の断熱ボード(5A)の端部で折り返された防湿板(5a)同士が互いに密着することになる。 In particular, the external heat insulating structure described in Patent Document 2 is a heat insulating and moisture proof panel (P) in which a heat insulating board (5A) functioning as a heat insulating layer and a metal plate-shaped moisture proof plate (5a) functioning as a moisture proof layer are integrated. ) Are arranged side by side on the outside of the building frame (3). Further, in the heat insulating and moisture proof panel (P) used in this external heat insulating structure, a moisture proof plate (5a) is laminated on the outer surface of the heat insulating board (5A) having both end edges formed in a hozo-gumi shape, and the moisture proof plate is laminated. The end portion of (5a) is folded back and embedded in the thick wall of the heat insulating board (5A). Then, when a plurality of heat insulating and moisture proof panels (P) configured in this way are arranged side by side on the outside of the building frame (3), the heat insulating board (5A) adjacent to the hozo groove (7) of the heat insulating board (5A). By fitting the hozo (8), the moisture-proof plates (5a) folded back at the ends of both heat insulating boards (5A) come into close contact with each other.

特開昭63−041784号公報Japanese Unexamined Patent Publication No. 63-041784 特開2008−163671号公報Japanese Unexamined Patent Publication No. 2008-163761

建物躯体の外断熱構造において、断熱層の外側に設けられる防湿板は、外気温の上昇や日射等により、昇温し熱膨張しやすい状態となる。よって、上述した特許文献1及び2に記載の従来の外断熱構造のように、金属製板状の防湿板が隣接間で互いに密着する状態で複数併設されている場合には、熱膨張や他の要因により、隣接する防湿板同士が互いに押し付けあって干渉し、結果、防湿板の変形や断熱層からの剥離が発生し、防湿層の防湿性能が損なわれるという問題が生じる。 In the external heat insulating structure of the building frame, the moisture-proof plate provided on the outside of the heat insulating layer rises in temperature due to an increase in outside air temperature, solar radiation, or the like, and tends to expand thermally. Therefore, as in the conventional external heat insulating structure described in Patent Documents 1 and 2 described above, when a plurality of metal plate-shaped moisture-proof plates are provided side by side in close contact with each other, thermal expansion or the like may occur. Due to the above factors, adjacent moisture-proof plates are pressed against each other and interfere with each other, resulting in deformation of the moisture-proof plates and peeling from the heat-insulating layer, resulting in a problem that the moisture-proof performance of the moisture-proof layer is impaired.

この実情に鑑み、本発明の主たる課題は、冷蔵・冷凍倉庫等の建物躯体に対して構築される外断熱構造において、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる技術を提供する点にある。 In view of this situation, the main problem of the present invention is to avoid interference due to thermal expansion between adjacent moisture-proof plates in the external heat insulating structure constructed for the building frame such as a refrigerating / freezing warehouse, and to cause the interference. The point is to provide a technology capable of preventing deformation and peeling of the moisture-proof plate and maintaining the moisture-proof performance of the moisture-proof layer.

本発明の第1特徴構成は、建物躯体の外側に設けられた断熱層と、当該断熱層の外側に設けられた防湿層とを備えた外断熱構造であって、
前記防湿層が、互いに隣接するもの同士の縁部間に隙間を設けた状態で複数並設された金属製板状の防湿板と、前記隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部とで構成されており、
前記防湿層に対して外方に離間した位置には外壁材が敷設されており、当該外壁材と当該防湿層との間には空気層が形成されており、
前記外壁材が、前記建物躯体の外表面に固定された鉄骨材により支持されており、
前記鉄骨材の周囲部には断熱材が充填されており、
前記断熱層が、前記建物躯体側から順に2層の断熱ボードと1層の断熱ボードとからなる3層構造とされていると共に、最も外側に敷設される断熱ボードが前記防湿板と一体化された断熱防湿パネルとして設けられており、
前記断熱防湿パネルが、前記断熱ボードの外周部に、隣接する断熱ボードに密着する密着露出面を有すると共に、前記建物躯体の外表面の面内方向に沿って前記防湿板の外周部を前記密着露出面よりも内側に引退させて構成されている点にある。
The first characteristic configuration of the present invention is an external heat insulating structure including a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer.
A plurality of metal plate-shaped moisture-proof plates in which the moisture-proof layers are arranged side by side with a gap between edges of adjacent ones, and a gap that closes the gap by following a change in the width of the gap. It is composed of a moisture-proof part,
An outer wall material is laid at a position separated outward from the moisture-proof layer, and an air layer is formed between the outer wall material and the moisture-proof layer.
The outer wall material is supported by a steel frame material fixed to the outer surface of the building frame.
A heat insulating material is filled around the steel frame material .
The heat insulating layer has a three-layer structure consisting of a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is integrated with the moisture-proof plate. It is provided as a heat insulating and moisture proof panel.
The heat-insulating and moisture-proof panel has an exposed surface in close contact with the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate is brought into close contact with the outer peripheral portion of the outer surface of the building skeleton along the in-plane direction. The point is that it is constructed by retreating inward from the exposed surface.

本構成によれば、断熱層の外側に設けられた防湿層において、複数並設された金属製板状の防湿板の隣接間に隙間が設けられているので、当該防湿板が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板同士の干渉を上記隙間にて回避することができる。更に、このような防湿板の熱膨張や変位等に起因して、防湿板の隣接間に形成された隙間の幅が変化する場合であっても、隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部により、断熱層側への水分を含む空気の浸入を防止することができる。
従って、本発明により、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる外断熱構造を提供することができる。
According to this configuration, in the moisture-proof layer provided on the outside of the heat insulating layer, a gap is provided between the adjacent metal plate-shaped moisture-proof plates arranged side by side, so that the moisture-proof plate raises the outside air temperature. Even if it is thermally expanded due to solar radiation or the like, or if it is displaced in the in-plane direction due to other factors, interference between adjacent moisture-proof plates can be avoided by the above-mentioned gap. Further, even if the width of the gap formed between the adjacent moisture-proof plates changes due to such thermal expansion or displacement of the moisture-proof plate, the gap follows the change in the width of the gap. It is possible to prevent the intrusion of air containing moisture into the heat insulating layer side by the gap moisture-proof portion that closes the gap.
Therefore, according to the present invention, an external heat insulating structure capable of avoiding interference due to thermal expansion or the like between adjacent moisture-proof plates, preventing deformation or peeling of the moisture-proof plates due to the interference, and maintaining the moisture-proof performance of the moisture-proof layer. Can be provided.

本発明の第2特徴構成は、前記防湿板には、前記建物躯体に対して前記断熱層及び前記防湿層を固定するための断熱アンカーが挿通される挿通孔が面内方向に予め分散形成されている点にある
本発明の第特徴構成は、前記隙間防湿部が、前記隙間を埋める弾性材料からなるシール部とそのシール部の外表面側を覆う形態で貼着されたテープ材とで構成されている点にある。
更に、本発明の別の構成は、前記断熱層と前記防湿層とが、前記断熱層を構成する断熱ボードと前記防湿板とを一体化してなる断熱防湿パネルを前記建物躯体の外側に複数並設して構成され、
前記断熱防湿パネルが、前記断熱ボードの外周部に、隣接する断熱ボードに密着する密着露出面を有すると共に、前記防湿板の外周部を面内方向に沿って前記密着露出面よりも内側に引退させて構成されている点にある。
The second characteristic configuration of the present invention is that the moisture-proof plate is preliminarily dispersed in the in-plane direction with insertion holes through which the heat insulating layer and the heat insulating anchor for fixing the moisture-proof layer are inserted with respect to the building frame. There is a point .
The third characteristic configuration of the present invention is that the gap moisture-proof portion is composed of a sealing portion made of an elastic material that fills the gap and a tape material that is attached so as to cover the outer surface side of the sealing portion. It is in.
Further, in another configuration of the present invention, a plurality of heat insulating and moisture proof panels formed by integrating the heat insulating layer and the moisture proof layer with the heat insulating board constituting the heat insulating layer and the moisture proof plate are arranged on the outside of the building frame. Set up and configured
The heat-insulating and moisture-proof panel has a contact-exposed surface in close contact with the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate is retired inward from the close-contact exposed surface along the in-plane direction. It is in the point that it is composed by letting.

本構成によれば、断熱ボードと防湿板とを一体化してなる断熱防湿パネルにおいて、防湿板の外周部が断熱ボードの外周部に形成された密着露出面よりも内側に引退しているので、その断熱防湿パネルを隣接間で断熱ボードの密着露出面を密着させながら建物躯体の外側に複数並設するという簡単な作業によって、防湿板の隣接間に隙間を確実に形成しながら断熱ボードの隣接間での放熱を抑制して優れた断熱性能を確保する状態で、外断熱構造の断熱層と防湿層とを構築することができる。 According to this configuration, in the heat insulating and moisture proof panel in which the heat insulating board and the moisture proof plate are integrated, the outer peripheral portion of the moisture proof plate is retreated inward from the close contact exposed surface formed on the outer peripheral portion of the heat insulating board. Adjacent to the heat insulating board by arranging a plurality of the heat insulating and moisture proof panels side by side on the outside of the building frame while keeping the exposed surfaces of the heat insulating board in close contact with each other while surely forming a gap between the adjacent moisture proof boards. It is possible to construct a heat insulating layer and a moisture proof layer having an external heat insulating structure in a state where heat dissipation between them is suppressed and excellent heat insulating performance is ensured.

本発明の別の構成は、前記防湿板が、外周部に折曲部を有し、
前記断熱ボードが、外周部の前記防湿板側の縁部に、前記防湿板の折曲部が前記密着露出面よりも内側に引退して隙間を形成する状態で嵌合可能な嵌合段部を有し、
前記断熱防湿パネルが、前記断熱ボードの嵌合段部に前記防湿板の折曲部を嵌合させて構成されている点にある。
In another configuration of the present invention, the moisture-proof plate has a bent portion on the outer peripheral portion, and the moisture-proof plate has a bent portion.
A fitting step portion in which the heat insulating board can be fitted to the edge portion of the outer peripheral portion on the moisture-proof plate side in a state where the bent portion of the moisture-proof plate retreats inward from the close contact exposed surface to form a gap. Have,
The heat-insulating and moisture-proof panel is configured by fitting the bent portion of the moisture-proof plate into the fitting step portion of the heat-insulating board.

本構成によれば、断熱ボードの外周部の縁部に形成された嵌合段部に対して、防湿板の外周部に設けられた折曲部を嵌合させる形態で、防湿板の折曲部を断熱ボードの密着露出面よりも確実に内側に引退させながら、断熱ボードと防湿板とを安定且つ強固に一体化させて、平面度が高い断熱防湿パネルを製作することができる。
よって、断熱ボードと防止板との経年劣化による接着力低下や温度変化による挙動に起因した防湿板の剥離や変形を防止することができ、更には、このような断熱防湿パネルを建物躯体の外側に複数並設することで、互いに隣接する防湿板の折曲部の間に安定して均一な隙間を形成しながら、当該並設された複数の断熱防湿パネルにより構築された断熱層及び防湿層の不陸を抑制することができる。
According to this configuration, the moisture-proof plate is bent in a form in which the bent portion provided on the outer periphery of the moisture-proof plate is fitted to the fitting step portion formed on the edge of the outer peripheral portion of the heat insulating board. It is possible to manufacture a heat-insulating and moisture-proof panel having a high flatness by stably and firmly integrating the heat-insulating board and the moisture-proof plate while surely retreating the portion inward from the contact-exposed surface of the heat-insulating board.
Therefore, it is possible to prevent the moisture-proof plate from peeling off or deforming due to the deterioration of the adhesive force between the heat-insulating board and the prevention plate due to aged deterioration and the behavior due to the temperature change. By arranging a plurality of layers in parallel, a heat insulating layer and a moisture proof layer constructed by the plurality of heat insulating and moisture proof panels arranged side by side while forming a stable and uniform gap between the bent portions of the moisture proof plates adjacent to each other. It is possible to suppress the non-landing of.

本発明の別の構成は、前記防湿層の外側に第2断熱層を設けた点にある。 Another configuration of the present invention is that a second heat insulating layer is provided on the outside of the moisture-proof layer.

本構成によれば、防湿層の外側に第2断熱層が設けられているので、外気温の上昇や日射等による熱が第2断熱層側から防湿層側に伝達されることを抑制することができる。これにより、防湿層を構成する防湿板の熱膨張が抑制されるので、その熱膨張による防湿板同士の干渉を回避するための隙間の幅を極力小さくして、当該隙間への指や異物の挿入による隙間防湿部の損傷を回避することができる。 According to this configuration, since the second heat insulating layer is provided on the outside of the moisture-proof layer, it is possible to suppress the transfer of heat due to an increase in outside air temperature or solar radiation from the second heat insulating layer side to the moisture-proof layer side. Can be done. As a result, the thermal expansion of the moisture-proof plates constituting the moisture-proof layer is suppressed, so that the width of the gap for avoiding interference between the moisture-proof plates due to the thermal expansion is made as small as possible, and fingers and foreign substances enter the gap. It is possible to avoid damage to the gap moisture-proof part due to insertion.

本発明の第特徴構成は、建物躯体の外側に断熱層を敷設し、当該断熱層の外側に防湿層を敷設して、上記第1乃至第特徴構成の何れかの外断熱構造を構築する外断熱構造の施工方法であって、
隣接する断熱ボードに密着する密着露出面を外周部に有する断熱ボードと、前記建物躯体の外表面の面内方向に沿って外周部を面内方向に沿って前記密着露出面よりも内側に引退させた防湿板とを、予め一体化してなる断熱防湿パネルを用い、
前記断熱層を、前記建物躯体側から順に2層の断熱ボードと1層の断熱ボードとからなる3層構造とすると共に、最も外側に敷設される断熱ボードを前記断熱防湿パネルとして設け、
当該断熱防湿パネルの複数を、互いに隣接するもの同士の間において前記断熱ボードの密着露出面を密着させながら建物躯体の外表面に並設すると共に、当該並設された断熱防湿パネルにおける前記防湿板の互いに隣接するもの同士の間に形成される隙間を可撓性の隙間防湿部で塞ぐことで、前記断熱ボードで前記断熱層を構成すると共に、前記防湿板及び前記隙間防湿部で前記防湿層を構成する点にある。
In the fourth characteristic configuration of the present invention, a heat insulating layer is laid on the outside of the building frame, and a moisture-proof layer is laid on the outside of the heat insulating layer to construct an external heat insulating structure according to any one of the first to third feature configurations. It is a construction method of the external heat insulation structure
A heat insulating board having a close contact exposed surface in close contact with an adjacent heat insulating board on the outer periphery, and a heat insulating board having an outer peripheral portion along the in-plane direction of the outer surface of the building frame retired inward from the close contact exposed surface along the in-plane direction. Using a heat-insulating and moisture-proof panel that is integrated with the moisture-proof plate that has been made in advance,
The heat insulating layer has a three-layer structure including a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is provided as the heat insulating and moisture proof panel.
A plurality of the heat insulating and moisture proof panels are arranged side by side on the outer surface of the building frame while the close contact exposed surfaces of the heat insulating boards are brought into close contact with each other adjacent to each other, and the moisture proof plates in the juxtaposed heat insulating and moisture proof panels are arranged side by side. By closing the gap formed between those adjacent to each other with a flexible gap moisture-proof portion, the heat-insulating board constitutes the heat-insulating layer, and the moisture-proof plate and the gap-moisture-proof portion form the moisture-proof layer. Is the point that constitutes.

本構成によれば、断熱ボードと防湿板とを一体化してなる断熱防湿パネルにおいて、防湿板の外周部が断熱ボードの外周部に形成された密着露出面よりも内側に引退しているので、その断熱防湿パネルを隣接間で断熱ボードの密着露出面を密着させながら建物躯体の外側に複数並設するという簡単な作業によって、複数並設された防湿板の隣接間に隙間を確実に形成しながら断熱ボードの隣接間での放熱を抑制して優れた断熱性能を確保する状態で、外断熱構造の断熱層と防湿層とを構築することができる。
そして、このように構築された外断熱構造において、複数並設された金属製板状の防湿板の隣接間に隙間が設けられることになるので、当該防湿板が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板同士の干渉を上記隙間にて回避することができる。更に、このような防湿板の熱膨張や変位等に起因して、防湿板の隣接間に形成された隙間の幅が変化する場合であっても、隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部により、断熱層側への水分を含む空気の浸入を防止することができる。
従って、本発明により、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる外断熱構造の施工方法を提供することができる。
According to this configuration, in the heat insulating and moisture proof panel in which the heat insulating board and the moisture proof plate are integrated, the outer peripheral portion of the moisture proof plate is retreated inward from the close contact exposed surface formed on the outer peripheral portion of the heat insulating board. By the simple work of arranging multiple heat-insulating and moisture-proof panels on the outside of the building frame while keeping the exposed surfaces of the heat-insulating boards in close contact with each other, a gap is surely formed between the adjacent moisture-proof plates. However, it is possible to construct the heat insulating layer and the moisture proof layer of the external heat insulating structure in a state of suppressing heat dissipation between adjacent heat insulating boards and ensuring excellent heat insulating performance.
Then, in the external heat insulating structure constructed in this way, a gap is provided between the adjacent metal plate-shaped moisture-proof plates arranged side by side. Even when it is thermally expanded or displaced in the in-plane direction due to other factors, interference between adjacent moisture-proof plates can be avoided by the above gap. Further, even if the width of the gap formed between the adjacent moisture-proof plates changes due to such thermal expansion or displacement of the moisture-proof plate, the gap follows the change in the width of the gap. It is possible to prevent the intrusion of air containing moisture into the heat insulating layer side by the gap moisture-proof portion that closes the gap.
Therefore, according to the present invention, an external heat insulating structure capable of avoiding interference due to thermal expansion or the like between adjacent moisture-proof plates, preventing deformation or peeling of the moisture-proof plates due to the interference, and maintaining the moisture-proof performance of the moisture-proof layer. A construction method can be provided.

建物躯体の外断熱構造を説明する図Diagram explaining the external insulation structure of the building frame 建物躯体の屋根部に構築される外断熱構造の構成を示す概略断面図Schematic cross-sectional view showing the configuration of the external insulation structure constructed on the roof of the building frame 建物躯体の側壁部に構築される外断熱構造の構成を示す概略断面図Schematic cross-sectional view showing the configuration of the external heat insulating structure constructed on the side wall of the building frame. 断熱防湿パネルの構成を示す分解斜視図An exploded perspective view showing the configuration of a heat insulating and moisture proof panel 建物躯体の側壁部に構築される外断熱構造の部分拡大断面図Partially enlarged cross-sectional view of the external insulation structure constructed on the side wall of the building frame

本発明に係る外断熱構造及びその施工方法の実施形態について図面に基づいて説明する。
図1に示すように、本実施形態の外断熱構造2は、冷蔵・冷凍倉庫などに利用される建物100において、鉄筋コンクリート造の建物躯体1の屋外側を断熱するものとして構築されている。外断熱構造2としては、屋外から建物躯体1の側壁部1Wへの伝熱を抑制するために当該側壁部1Wの屋外側(図4及び図5では側壁部1Wの右側が屋外側となる。)に構築された側壁部外断熱構造2Wと、屋外から建物躯体1の屋根部1Lへの伝熱を抑制するために当該屋根部1Lの屋外側(図2では屋根部1Lの上方側が屋外側となる。)に構築された屋根部外断熱構造2Lが設けられている。
An embodiment of the external heat insulating structure and the construction method thereof according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the external heat insulating structure 2 of the present embodiment is constructed to insulate the outdoor side of a reinforced concrete building frame 1 in a building 100 used for a refrigerating / freezing warehouse or the like. As the external heat insulating structure 2, in order to suppress heat transfer from the outside to the side wall portion 1W of the building frame 1, the outdoor side of the side wall portion 1W (in FIGS. 4 and 5, the right side of the side wall portion 1W is the outdoor side. ), And the outdoor side of the roof 1L in order to suppress heat transfer from the outside to the roof 1L of the building frame 1 (in FIG. 2, the upper side of the roof 1L is the outdoor side). The roof outer heat insulating structure 2L constructed in) is provided.

更に、地盤に接触する建物躯体1の1階床スラブ1Fの内側には、地盤から当該1階床スラブ1Fを介して建物100の内部への伝熱を抑制するために床断熱構造2Fが構築されている。そして、これら断熱構造2W,2L,2Fにより、建物100の内部が屋外及び地盤に対して断熱されることになる。 Further, inside the first floor slab 1F of the building frame 1 in contact with the ground, a floor insulation structure 2F is constructed in order to suppress heat transfer from the ground to the inside of the building 100 via the first floor slab 1F. Has been done. Then, the inside of the building 100 is insulated from the outside and the ground by these heat insulating structures 2W, 2L, and 2F.

〔外断熱構造2〕
以下、側壁部外断熱構造2Wや屋根部外断熱構造2Lとして構成される外断熱構造2の共通の構成について説明を加える。
外断熱構造2は、図2及び図3に示すように、建物躯体1の外側に敷設された断熱層Aと、当該断熱層Aの外側に敷設された防湿層Bとを備える。
断熱層Aは、断熱ボード12,13を建物躯体1の外表面において複数並設して構成されている。尚、断熱ボード12,13を構成する断熱材は、断熱性を有するものであれば適宜利用することができるが、例えば、ポリウレタン発泡体、ポリスチレン発泡体、ガラスウール等の高断熱性材料を利用することができる。
また、本実施形態において、断熱層Aは、建物躯体1側から順に2層の断熱ボード13と1層の断熱ボード12とからなる3層構造を有する。尚、詳細については後述するが、最も外側に敷設される断熱ボード12は、その外表面に設けられる防湿板11と一体化された断熱防湿パネル10として設けられている。
また、これら断熱ボード13及び断熱防湿パネル10は、建物躯体1の外側において複数並設して積層するにあたり、同一箇所に継ぎ目が重ならないように千鳥状に配置されている。
[External insulation structure 2]
Hereinafter, a common configuration of the external heat insulating structure 2 configured as the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L will be described.
As shown in FIGS. 2 and 3, the external heat insulating structure 2 includes a heat insulating layer A laid on the outside of the building frame 1 and a moisture proof layer B laid on the outside of the heat insulating layer A.
The heat insulating layer A is configured by arranging a plurality of heat insulating boards 12 and 13 side by side on the outer surface of the building frame 1. The heat insulating material constituting the heat insulating boards 12 and 13 can be appropriately used as long as it has heat insulating properties, and for example, a highly heat insulating material such as polyurethane foam, polystyrene foam, or glass wool is used. can do.
Further, in the present embodiment, the heat insulating layer A has a three-layer structure including a two-layer heat insulating board 13 and a one-layer heat insulating board 12 in order from the building frame 1 side. Although the details will be described later, the heat insulating board 12 laid on the outermost side is provided as a heat insulating and moisture proof panel 10 integrated with the moisture proof plate 11 provided on the outer surface thereof.
Further, when a plurality of the heat insulating board 13 and the heat insulating and moisture proof panel 10 are arranged side by side on the outside of the building frame 1 and laminated, they are arranged in a staggered pattern so that the seams do not overlap at the same place.

一方、防湿層Bは、非通気性を有しており、かかる防湿層Bを断熱層Aの外側に設けることで、断熱層A側への水分を含む空気の浸入が回避されて、断熱層A側での内部結露による断熱性の低下が防止されている。
尚、建物躯体1への断熱層A並びに防湿層Bの固定は、断熱性を有する公知の断熱アンカー30を貫通させ建物躯体1に打ち込むことで行われている。また、防湿層Bの外表面に露出される断熱アンカー30の頭部には、それを覆う形態でアルミニウム製のテープ材33が貼着されており、これにより、断熱アンカー30の貫通部を介した水分を含む空気の浸入が防止されている。即ち、このテープ材33についても防湿層Bとして機能することになる。
On the other hand, the moisture-proof layer B has non-breathability, and by providing the moisture-proof layer B on the outside of the heat insulating layer A, the infiltration of air containing moisture into the heat insulating layer A side is avoided, and the heat insulating layer is prevented from entering. Deterioration of heat insulating property due to internal dew condensation on the A side is prevented.
The heat insulating layer A and the moisture-proof layer B are fixed to the building skeleton 1 by penetrating a known heat insulating anchor 30 having a heat insulating property and driving the heat insulating layer A into the building skeleton 1. Further, an aluminum tape material 33 is attached to the head of the heat insulating anchor 30 exposed on the outer surface of the moisture-proof layer B so as to cover the heat insulating anchor 30 through the penetrating portion of the heat insulating anchor 30. The ingress of air containing moisture is prevented. That is, the tape material 33 also functions as the moisture-proof layer B.

防湿層Bは、図2,図3,及び図5に示すように、隣接間に隙間15を設けて複数並設されたアルミニウム製鋼板、ステンレス製鋼板、アルミ亜鉛合金メッキ鋼板などの金属製板状の防湿板11と、この隙間15の幅の変化に追従して当該隙間15を塞ぐ隙間防湿部32とで構成されている。ここで、防湿板11が金属板で構成されているので、アルミ箔等を利用する場合と比べて傷が付き難く高強度となり、例えば屋根部外断熱構造2Lの防湿板11として利用した場合でも、歩行に耐え得る強度を発揮させることができる。 As shown in FIGS. 2, 3 and 5, the moisture-proof layer B is a metal plate such as an aluminum steel plate, a stainless steel plate, and an aluminum-zinc alloy-plated steel plate, which are arranged side by side with a gap 15 provided between them. It is composed of a moisture-proof plate 11 having a shape, and a gap moisture-proof portion 32 that follows a change in the width of the gap 15 and closes the gap 15. Here, since the moisture-proof plate 11 is made of a metal plate, it is less likely to be scratched and has high strength as compared with the case where aluminum foil or the like is used. , It is possible to exert the strength that can withstand walking.

即ち、断熱層Aの外側に設けられた防湿層Bにおいて、複数並設された金属製板状の防湿板11の隣接間に隙間15が設けられているので、当該防湿板11が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板11同士の干渉が上記隙間15にて回避されて、当該干渉による防湿板11の変形や剥離が防止されることになる。
更に、このような防湿板11の熱膨張や変位等に起因して、防湿板11の隣接間に形成された隙間15の幅が変化する場合であっても、隙間15の幅の変化に追従して当該隙間15を塞ぐ隙間防湿部32により、断熱層A側への水分を含む空気の浸入が防止されて、防湿層Bの防湿性能が維持されることになる。
That is, in the moisture-proof layer B provided on the outside of the heat insulating layer A, a gap 15 is provided between adjacent a plurality of metal plate-shaped moisture-proof plates 11 arranged side by side, so that the moisture-proof plate 11 is exposed to the outside air temperature. Even if it is thermally expanded due to rising or sunlight, or if it is displaced in the in-plane direction due to other factors, the interference between the adjacent moisture-proof plates 11 is avoided by the gap 15, and the moisture-proof plate 11 due to the interference is avoided. Deformation and peeling will be prevented.
Further, even if the width of the gap 15 formed between the adjacent moisture-proof plates 11 changes due to such thermal expansion or displacement of the moisture-proof plate 11, the change in the width of the gap 15 is followed. Then, the gap moisture-proof portion 32 that closes the gap 15 prevents the intrusion of air containing moisture into the heat insulating layer A side, and the moisture-proof performance of the moisture-proof layer B is maintained.

隙間防湿部32は、隙間15を埋める弾性材料からなるシール部32aと、そのシール部32aの外表面側を覆う形態で貼着されたアルミニウム製等のテープ材32bとで構成されている。
尚、シール部32aは、シリコン系シーリング材、アクリル系シーリング材、ポリウレタン系シーリング材などのような硬化後に弾性体となるシーリング材を隙間15に充填することで形成される。
The gap moisture-proof portion 32 is composed of a sealing portion 32a made of an elastic material that fills the gap 15 and a tape material 32b made of aluminum or the like that is attached so as to cover the outer surface side of the sealing portion 32a.
The sealing portion 32a is formed by filling the gap 15 with a sealing material that becomes an elastic body after curing, such as a silicon-based sealing material, an acrylic-based sealing material, or a polyurethane-based sealing material.

〔断熱防湿パネル10〕
図2及び図3に示すように、断熱層Aにおいて最も外側に敷設される断熱ボード12と、その外表面に設けられる防湿層Bを構成する防湿板11とは、後述する断熱防湿パネル10を建物躯体1の外側に積層された2層の断熱ボード13の外表面に複数並設することで構築されている。
以下、この断熱防湿パネル10の詳細について説明を加える。
[Insulation and moisture proof panel 10]
As shown in FIGS. 2 and 3, the heat insulating board 12 laid on the outermost side of the heat insulating layer A and the moisture proof plate 11 constituting the moisture proof layer B provided on the outer surface thereof are provided with a heat insulating and moisture proof panel 10 described later. It is constructed by arranging a plurality of layers on the outer surface of the two-layer heat insulating board 13 laminated on the outside of the building frame 1.
Hereinafter, details of the heat insulating and moisture proof panel 10 will be described.

図4に示すように、断熱防湿パネル10は、略直方体の形状を有しており、断熱層Aを構成する略直方体の断熱ボード12と、その断熱ボード12の外表面側を覆う略長方形の防湿板11とを、予め一体化して構成されている。更に、この断熱防湿パネル10において、断熱ボード12は、その外周部の側面に、隣接する断熱ボードに密着する密着露出面12bを有すると共に、防湿板11は、その外周部を面内方向に沿って密着露出面12bよりも内側に引退させて構成されている。
また、防湿板11には、断熱アンカー30が挿通する挿通孔11bが面内方向に分散形成されている。
As shown in FIG. 4, the heat insulating and moisture-proof panel 10 has a substantially rectangular parallelepiped shape, and is a substantially rectangular parallelepiped heat insulating board 12 constituting the heat insulating layer A and a substantially rectangular shape covering the outer surface side of the heat insulating board 12. The moisture-proof plate 11 is integrated in advance. Further, in the heat insulating and moisture proof panel 10, the heat insulating board 12 has a close contact exposed surface 12b that is in close contact with the adjacent heat insulating board on the side surface of the outer peripheral portion thereof, and the moisture proof plate 11 has the outer peripheral portion along the in-plane direction. It is configured to retreat inward from the close contact exposed surface 12b.
Further, in the moisture-proof plate 11, insertion holes 11b through which the heat insulating anchor 30 is inserted are dispersedly formed in the in-plane direction.

そして、外断熱構造2の施工方法では、図2及び図3に示すように、断熱防湿パネル10の複数を隣接間において断熱ボード12の密着露出面12bを密着させながら建物躯体1の外表面に複数並設する。すると、防湿板11の外周部が断熱ボード12の外周部に形成された密着露出面12bよりも内側に引退していることから、防湿板11の隣接間に隙間15が形成される。次に、このように形成された隙間15を可撓性の隙間防湿部32により塞ぐことにより、断熱防湿パネル10の断熱ボード12で断熱層Aが構成されると共に、防湿板11及び隙間防湿部32で防湿層Bが構成されることになる。 Then, in the construction method of the external heat insulating structure 2, as shown in FIGS. 2 and 3, a plurality of heat insulating and moisture proof panels 10 are brought into close contact with each other on the outer surface of the building frame 1 while the close contact exposed surface 12b of the heat insulating board 12 is brought into close contact with each other. Multiple units will be installed side by side. Then, since the outer peripheral portion of the moisture-proof plate 11 is retired inward from the close contact exposed surface 12b formed on the outer peripheral portion of the heat insulating board 12, a gap 15 is formed between the moisture-proof plates 11 adjacent to each other. Next, by closing the gap 15 thus formed with the flexible gap moisture-proof portion 32, the heat insulating layer A is formed by the heat insulating board 12 of the heat insulating and moisture-proof panel 10, and the moisture-proof plate 11 and the gap moisture-proof portion are formed. The moisture-proof layer B is formed by 32.

更に、図4に示すように、断熱防湿パネル10において、防湿板11は、外周部の四方を一方側に直角に折り曲げてなる折曲部11aを有する略箱状に形成されている。一方、断熱ボード12は、外周部の防湿板11側の縁部に、防湿板11の折曲部11aが密着露出面12bよりも内側に引退して隙間15(図5を参照)を形成する状態で嵌合可能な嵌合段部12aを有するように形成されている。
そして、断熱防湿パネル10は、適宜接着剤を間に介在させた状態で、断熱ボード12の嵌合段部12aに防湿板11の折曲部11aを嵌合させて構成されている。
Further, as shown in FIG. 4, in the heat insulating and moisture-proof panel 10, the moisture-proof plate 11 is formed in a substantially box shape having a bent portion 11a formed by bending four sides of the outer peripheral portion at right angles to one side. On the other hand, in the heat insulating board 12, the bent portion 11a of the moisture-proof plate 11 retreats inward from the close contact exposed surface 12b to form a gap 15 (see FIG. 5) at the edge of the outer peripheral portion on the moisture-proof plate 11 side. It is formed so as to have a fitting step portion 12a that can be fitted in the state.
The heat-insulating and moisture-proof panel 10 is configured by fitting the bent portion 11a of the moisture-proof plate 11 to the fitting step portion 12a of the heat-insulating board 12 with an adhesive appropriately interposed therein.

このように断熱ボード12の嵌合段部12aに防湿板11の折曲部11aを嵌合させると、図5に示すように、防湿板11の折曲部11aは、断熱ボード12の密着露出面12bよりも内側に引退された状態となる。このことで、複数の断熱防湿パネル10を隣接間で断熱ボード12の密着露出面12bを密着させながら断熱ボード13の外側に並設すれば、互いに隣接する防湿板11の折曲部11aの間には、均一な隙間15が確実に形成されることになり、更には断熱ボード12の隣接間での放熱が抑制されて、優れた断熱性能が確保される状態になる。
以上が、側壁部外断熱構造2Wや屋根部外断熱構造2Lとして構成される外断熱構造2の共通の構成及びその外断熱構造2で利用される断熱防湿パネル10の構成についての説明であるが、以下に、側壁部外断熱構造2W及び屋根部外断熱構造2Lの個別の構成について順に説明を加える。
When the bent portion 11a of the moisture-proof plate 11 is fitted to the fitting step portion 12a of the heat insulating board 12 in this way, as shown in FIG. 5, the bent portion 11a of the moisture-proof plate 11 is exposed in close contact with the heat insulating board 12. It is in a state of being retired inward from the surface 12b. As a result, if a plurality of heat insulating and moisture proof panels 10 are arranged side by side on the outside of the heat insulating board 13 while keeping the close contact exposed surface 12b of the heat insulating board 12 in close contact with each other, between the bent portions 11a of the moisture proof plates 11 adjacent to each other. In addition, a uniform gap 15 is surely formed, and further, heat dissipation between adjacent heat insulating boards 12 is suppressed, so that excellent heat insulating performance is ensured.
The above is a description of the common configuration of the external heat insulating structure 2 configured as the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L, and the configuration of the heat insulating and moisture proof panel 10 used in the external heat insulating structure 2. , The individual configurations of the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L will be described in order below.

〔側壁部外断熱構造2W〕
図3及び図5に示すように、側壁部外断熱構造2Wの更に屋外側には、外壁材20が敷設されている。更に、外壁材20は、側壁部外断熱構造2Wの防湿層Bに対して外方に離間した位置に設けられており、外壁材20と防湿層Bとの間には空気層23が形成されている。このことで、外壁材20が外気温の上昇や日射等により高温になる場合であっても、外壁材20と防湿層Bとの間に形成された空気層23により、その熱が側壁部外断熱構造2W側に伝達されることが抑制される。
[Insulation structure outside the side wall 2W]
As shown in FIGS. 3 and 5, an outer wall material 20 is laid on the outdoor side of the side wall external heat insulating structure 2W. Further, the outer wall material 20 is provided at a position outwardly separated from the moisture-proof layer B of the side wall external heat insulating structure 2W, and an air layer 23 is formed between the outer wall material 20 and the moisture-proof layer B. ing. As a result, even when the outer wall material 20 becomes hot due to an increase in the outside air temperature, sunlight, etc., the heat is generated outside the side wall portion by the air layer 23 formed between the outer wall material 20 and the moisture-proof layer B. Transmission to the heat insulating structure 2W side is suppressed.

そして、このように外壁材20から側壁部外断熱構造2W側への熱伝達が抑制されていることで、建物100の断熱性能の向上が図られると共に、防湿層Bを構成する防湿板11の熱膨張が抑制されることになる。このことで、防湿板11の熱膨張による防湿板11同士の干渉を回避するための隙間15の幅を例えば5mm程度と極力小さく設定することができる。そして、隙間15の幅が小さいことで、施工時において、当該隙間15への指や異物の挿入によるシール部32aやテープ材32bからなる隙間防湿部32の損傷が回避されることになる。 By suppressing the heat transfer from the outer wall material 20 to the side wall outer heat insulating structure 2W side in this way, the heat insulating performance of the building 100 can be improved, and the moisture-proof plate 11 constituting the moisture-proof layer B can be improved. Thermal expansion will be suppressed. As a result, the width of the gap 15 for avoiding interference between the moisture-proof plates 11 due to thermal expansion of the moisture-proof plate 11 can be set as small as possible, for example, about 5 mm. Since the width of the gap 15 is small, damage to the seal portion 32a and the gap moisture-proof portion 32 made of the tape material 32b due to insertion of a finger or a foreign object into the gap 15 can be avoided during construction.

尚、外壁材20は、建物躯体1の側壁部1Wの外側に固定された鉄骨材21により支持されている。また、この側壁部1Wの外表面側における鉄骨材21の周囲部には、発泡ウレタンなどの断熱材22が充填されており、これにより、この部位での断熱性が確保されている。 The outer wall material 20 is supported by a steel frame material 21 fixed to the outside of the side wall portion 1W of the building frame 1. Further, the peripheral portion of the steel frame material 21 on the outer surface side of the side wall portion 1W is filled with a heat insulating material 22 such as urethane foam, whereby the heat insulating property at this portion is ensured.

〔屋根部外断熱構造2L〕
図2に示すように、屋根部外断熱構造2Lの防湿層Bの屋外側(上方側)には、上述した断熱ボード12,13と同様の断熱ボード25を複数並設して構成された第2断熱層Cが設けられている。このように、防湿層Bの外側に第2断熱層Cが設けられているので、外気温の上昇や日射等による熱が防湿層B側に伝達されることが抑制され、屋根部外断熱構造2Lの断熱性が向上されるのに加えて、防湿層Bを構成する防湿板11の熱膨張が一層抑制されることになる。このことで、防湿板11の熱膨張による防湿板11同士の干渉を回避するための隙間15の幅を例えば5mm程度と極力小さく設定することができる。そして、隙間15の幅が小さいことで、施工時において、当該隙間15への指や異物の挿入によるシール部32aやテープ材32bからなる隙間防湿部32の損傷が回避されることになる。
[Insulation structure outside the roof 2L]
As shown in FIG. 2, on the outdoor side (upper side) of the moisture-proof layer B of the roof outer heat insulating structure 2L, a plurality of heat insulating boards 25 similar to the above-mentioned heat insulating boards 12 and 13 are arranged side by side. 2 The heat insulating layer C is provided. In this way, since the second heat insulating layer C is provided on the outside of the moisture proof layer B, it is possible to suppress the transfer of heat due to the rise in outside air temperature and sunlight to the moisture proof layer B side, and the heat insulating structure outside the roof portion. In addition to improving the heat insulating property of 2L, the thermal expansion of the moisture-proof plate 11 constituting the moisture-proof layer B is further suppressed. As a result, the width of the gap 15 for avoiding interference between the moisture-proof plates 11 due to thermal expansion of the moisture-proof plate 11 can be set as small as possible, for example, about 5 mm. Since the width of the gap 15 is small, damage to the seal portion 32a and the gap moisture-proof portion 32 made of the tape material 32b due to insertion of a finger or a foreign object into the gap 15 can be avoided during construction.

更に、第2断熱層Cの外表面には、屋上面の必要強度を確保しながら屋根部外断熱構造2L側への浸水を防止するために、アスファルト防水層などの保護層26が構築されている。尚、屋根部外断熱構造2Lにおいては、建物躯体1の屋根部1Lと断熱層Aとの間にも適宜防水下地が施されており、当該屋根部1L側への浸水が確実に防止されている。更に、保護層26の外表面の仕上げとして高反射塗装を施すことで、日射による防湿板11の熱膨張を一層抑制することができる。 Further, on the outer surface of the second heat insulating layer C, a protective layer 26 such as an asphalt waterproof layer is constructed in order to prevent water from entering the roof outer heat insulating structure 2L side while ensuring the required strength of the roof surface. There is. In the roof outer heat insulating structure 2L, a waterproof base is appropriately provided between the roof 1L of the building frame 1 and the heat insulating layer A, so that water intrusion to the roof 1L side is surely prevented. There is. Further, by applying a highly reflective coating as a finish on the outer surface of the protective layer 26, the thermal expansion of the moisture-proof plate 11 due to solar radiation can be further suppressed.

〔別実施形態〕
(1)上記実施形態では、防湿板11の隣接間に形成された隙間15の幅の変化に追従して当該隙間15を塞ぐ隙間防湿部32を、隙間15を埋めるシール部32aと、その外表面側を覆うテープ材32bとで構成したが、隙間防湿部32の機能を確保する範囲内において、シール部32a及びテープ材32bの何れか一方を省略したり、別の構成の隙間防湿部を採用しても構わない。
[Another Embodiment]
(1) In the above embodiment, the gap moisture-proof portion 32 that follows the change in the width of the gap 15 formed between the adjacent moisture-proof plates 11 and closes the gap 15, the seal portion 32a that fills the gap 15, and the outside thereof. Although it is composed of a tape material 32b that covers the surface side, either one of the seal portion 32a and the tape material 32b may be omitted or a gap moisture proof portion having a different configuration may be omitted within the range in which the function of the gap moisture proof portion 32 is secured. You may adopt it.

(2)上記実施形態では、屋根部外断熱構造2Lにおいてのみ防湿層Bの外側に第2断熱層Cを設けたが、第2断熱層Cは適宜省略しても構わない。また、側壁部外断熱構造2Wにおいても、防湿層Bの外側に第2断熱層を設けても構わない。 (2) In the above embodiment, the second heat insulating layer C is provided outside the moisture-proof layer B only in the roof outer heat insulating structure 2L, but the second heat insulating layer C may be omitted as appropriate. Further, also in the side wall external heat insulating structure 2W, a second heat insulating layer may be provided on the outside of the moisture-proof layer B.

(3)上記実施形態では、断熱ボード12と防湿板11とを一体化してなる断熱防湿パネル10を建物躯体1の外側に複数並設して、外断熱構造2を構築したが、これら断熱ボードと防湿板とを別々に建物躯体1の外側に敷設して、外断熱構造2を構築しても構わない。この場合、断熱ボードについては、隣接間において断熱ボードの側面を密着させながら建物躯体の外表面に複数並設し、防湿板については、隣接間において隙間を設けて複数並設することになり、この隙間に対して隙間防湿部が設けられることになる。 (3) In the above embodiment, a plurality of heat insulating and moisture proof panels 10 in which the heat insulating board 12 and the moisture proof plate 11 are integrated are arranged side by side on the outside of the building frame 1 to construct the external heat insulating structure 2. And the moisture-proof plate may be laid separately on the outside of the building frame 1 to construct the external heat insulating structure 2. In this case, a plurality of heat insulating boards are arranged side by side on the outer surface of the building frame while keeping the side surfaces of the heat insulating boards in close contact with each other, and a plurality of moisture proof boards are arranged side by side with a gap between the adjacent parts. A gap moisture-proof portion is provided for this gap.

1 建物躯体
2 外断熱構造
2L 屋根部外断熱構造(外断熱構造)
2W 側壁部外断熱構造(外断熱構造)
10 断熱防湿パネル
11 防湿板
11 湿板
11a 折曲部
12 断熱ボード
12a 嵌合段部
12b 密着露出面
13 断熱ボード
15 隙間
25 第2断熱層
32 隙間防湿部
32a シール部(隙間防湿部)
32b テープ材(隙間防湿部)
100 建物
A 断熱層
B 防湿層
1 Building frame 2 External insulation structure 2L Roof external insulation structure (external insulation structure)
2W side wall external insulation structure (external insulation structure)
10 Insulation / moisture proof panel 11 Moisture proof plate 11 Wet plate 11a Bent part 12 Insulation board 12a Fitting step part 12b Adhesion exposed surface 13 Insulation board 15 Gap 25 Second heat insulation layer 32 Gap moisture proof part 32a Seal part (gap moisture proof part)
32b Tape material (gap moisture proof part)
100 Building A Insulation layer B Moisture proof layer

Claims (4)

建物躯体の外側に設けられた断熱層と、当該断熱層の外側に設けられた防湿層とを備えた外断熱構造であって、
前記防湿層が、互いに隣接するもの同士の縁部間に隙間を設けた状態で複数並設された金属製板状の防湿板と、前記隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部とで構成されており、
前記防湿層に対して外方に離間した位置には外壁材が敷設されており、当該外壁材と当該防湿層との間には空気層が形成されており、
前記外壁材が、前記建物躯体の外表面に固定された鉄骨材により支持されており、
前記鉄骨材の周囲部には断熱材が充填されており、
前記断熱層が、前記建物躯体側から順に2層の断熱ボードと1層の断熱ボードとからなる3層構造とされていると共に、最も外側に敷設される断熱ボードが前記防湿板と一体化された断熱防湿パネルとして設けられており、
前記断熱防湿パネルが、前記断熱ボードの外周部に、隣接する断熱ボードに密着する密着露出面を有すると共に、前記建物躯体の外表面の面内方向に沿って前記防湿板の外周部を前記密着露出面よりも内側に引退させて構成されている外断熱構造。
An external heat insulating structure including a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer.
A plurality of metal plate-shaped moisture-proof plates in which the moisture-proof layers are arranged side by side with a gap between edges of adjacent ones, and a gap that closes the gap by following a change in the width of the gap. It is composed of a moisture-proof part,
An outer wall material is laid at a position separated outward from the moisture-proof layer, and an air layer is formed between the outer wall material and the moisture-proof layer.
The outer wall material is supported by a steel frame material fixed to the outer surface of the building frame.
A heat insulating material is filled around the steel frame material .
The heat insulating layer has a three-layer structure consisting of a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is integrated with the moisture-proof plate. It is provided as a heat insulating and moisture proof panel.
The heat-insulating and moisture-proof panel has an exposed contact surface that adheres to the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate adheres to the outer peripheral portion of the outer surface of the building frame along the in-plane direction. External heat insulation structure that is constructed by retiring inside from the exposed surface.
前記防湿板には、前記建物躯体に対して前記断熱層及び前記防湿層を固定するための断熱アンカーが挿通される挿通孔が面内方向に予め分散形成されている請求項1に記載の外断熱構造。 2. Insulation structure. 前記隙間防湿部が、前記隙間を埋める弾性材料からなるシール部とそのシール部の外表面側を覆う形態で貼着されたテープ材とで構成されている請求項1又は2に記載の外断熱構造。 The external heat insulating portion according to claim 1 or 2 , wherein the gap moisture-proof portion is composed of a sealing portion made of an elastic material that fills the gap and a tape material attached so as to cover the outer surface side of the sealing portion. structure. 建物躯体の外側に断熱層を敷設し、当該断熱層の外側に防湿層を敷設して、請求項1〜の何れか1項に記載の外断熱構造を構築する外断熱構造の施工方法であって、
隣接する断熱ボードに密着する密着露出面を外周部に有する断熱ボードと、前記建物躯体の外表面の面内方向に沿って外周部を前記密着露出面よりも内側に引退させた防湿板とを、予め一体化してなる断熱防湿パネルを用い、
前記断熱層を、前記建物躯体側から順に2層の断熱ボードと1層の断熱ボードとからなる3層構造とすると共に、最も外側に敷設される断熱ボードを前記断熱防湿パネルとして設け、
当該断熱防湿パネルの複数を、互いに隣接するもの同士の間において前記断熱ボードの密着露出面を密着させながら建物躯体の外表面に並設すると共に、当該並設された断熱防湿パネルにおける前記防湿板の互いに隣接するもの同士の間に形成される隙間を可撓性の隙間防湿部で塞ぐことで、前記断熱ボードで前記断熱層を構成すると共に、前記防湿板及び前記隙間防湿部で前記防湿層を構成する外断熱構造の施工方法。
The method for constructing an external heat insulating structure according to any one of claims 1 to 3 by laying a heat insulating layer on the outside of the building frame and laying a moisture proof layer on the outside of the heat insulating layer. There,
A heat insulating board having a close contact exposed surface in close contact with an adjacent heat insulating board on the outer peripheral portion, and a moisture-proof plate in which the outer peripheral portion is retired inward from the close contact exposed surface along the in-plane direction of the outer surface of the building frame. , Using a pre-integrated heat-insulating and moisture-proof panel,
The heat insulating layer has a three-layer structure including a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is provided as the heat insulating and moisture proof panel.
A plurality of the heat insulating and moisture proof panels are arranged side by side on the outer surface of the building skeleton while keeping the close contact exposed surface of the heat insulating board in close contact with each other adjacent to each other, and the moisture proof plate in the juxtaposed heat insulating and moisture proof panel. By closing the gap formed between those adjacent to each other with a flexible gap moisture-proof portion, the heat-insulating board constitutes the heat-insulating layer, and the moisture-proof plate and the gap-moisture-proof portion form the moisture-proof layer. Construction method of the external heat insulation structure that composes.
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