JP7728728B2 - Insulated structure - Google Patents

Description

The present invention relates to a thermal insulation structure .

Patent Document 1 below describes a structure for the exterior corners of buildings in which heat insulating material is attached to columns installed at the corners of the building to prevent condensation from occurring at the corners due to thermal bridges.

JP 2010-156119 A

As in the exterior wall corner structure described in Patent Document 1, covering columns with insulation is effective in suppressing thermal bridges. Building corners are particularly susceptible to thermal bridges due to exposure to the outside air from two directions, so there is a need to improve their insulation performance. Therefore, in order to improve the insulation performance of building corners, it is conceivable to install insulation on the indoor side of the columns at the corners in addition to the outdoor insulation described in Patent Document 1.

However, building columns are often formed by connecting lower and upper columns, and in such cases, interference between the connecting parts of the column components and the insulation can make construction of the connecting parts and placement of the insulation difficult.

In consideration of the above, the present invention aims to provide an insulating structure and insulating method that makes it easy to install pillars and insulating materials.

The first type of thermal insulation structure comprises a column arranged at a corner of a building and formed with a lower column and an upper column arranged vertically; connecting members arranged on the indoor surfaces of the lower column and the upper column and connecting the lower column and the upper column; an outer insulating material covering two adjacent outdoor surfaces of the column; a fixing member fixing the outer insulating material to the column; and an inner insulating material formed as a separate member from the outer insulating material, arranged in contact with the outer insulating material, and covering the two indoor surfaces of the column.

In the first type of thermal insulation structure, the two outdoor surfaces of a column located at a corner of a building are covered with external insulation. The two indoor surfaces of the column are also covered with internal insulation. This internal insulation is placed in contact with the external insulation. Therefore, a continuous insulation layer is formed from the outdoor side of the column to the indoor side at the corner of the building. This improves the insulation of the corner of the building, where thermal bridges are likely to occur.

In addition, in this thermal insulation structure, the outer and inner insulation materials are formed separately. This allows the timing of installing the insulation materials to be staggered between the outer and inner sides. This makes it possible to adopt a process such as placing the outer insulation material on the outdoor surfaces of the lower and upper columns, connecting the lower and upper columns with connecting members, and then placing the inner insulation material on the indoor surfaces of the lower and upper columns. This process makes it easy to install the connections between the lower and upper columns, i.e., the columns and the insulation.

In contrast, if the outer and inner insulation materials are formed as a single unit, connecting the lower and upper columns after installing the insulation would be difficult because the connecting members would interfere with the insulation. Alternatively, installing insulation after connecting the lower and upper columns would require setting up scaffolding on the outdoor side of the columns and working from the outside, or reaching out from the indoor side to work from the outdoor side of the columns, making it difficult to work.

Furthermore, when the outer and inner insulation materials are formed as a single unit, the insulation material is bent from the outdoor side of the pillar to the indoor side during installation, which results in a thinner bent portion, which may have inferior insulating properties compared to other portions. In contrast, if the outer and inner insulation materials are formed as separate pieces, this deterioration in insulating properties due to bending can be prevented.

The second aspect of the thermal insulation structure is the thermal insulation structure described in the first aspect, in which the fixing member is an adhesive applied to the pillar.

In the second type of thermal insulation structure, the fixing member that secures the external insulation material to the pillar is adhesive. Because the adhesive is applied in a planar manner, the external insulation material can be supported by a surface against the pillar. This makes it easier to hold the external insulation material stably.

A third aspect of the thermal insulation structure is the thermal insulation structure described in the first aspect, in which the fixing members are multiple rod-shaped members joined to the pillars and protruding to the outdoor side of the pillars, and the rod-shaped members penetrate the outer insulation material.

In the third embodiment of the thermal insulation structure, the fixing members that secure the outer insulation material to the pillars are multiple rod-shaped members that are joined to the pillars and protrude toward the outdoor side of the pillars.

This rod-shaped member penetrates the external insulation. When the external insulation is supported by such a rod-shaped member, the load of the external insulation acts on the rod-shaped member. If the rod-shaped member is sufficiently rigid, shear deformation of the external insulation due to its own weight is suppressed, even if the external insulation is thick or heavy. This makes it easier to maintain its insulating properties.

The fourth aspect of the thermal insulation structure is the thermal insulation structure described in the first aspect, wherein the fixing member comprises a wooden base material joined to the pillar and a plurality of rod-shaped members inserted into the wooden base material and protruding to the outdoor side of the pillar, and the rod-shaped members penetrate the outer insulation material.

The fourth type of thermal insulation structure includes a wooden base material joined to the pillars, and multiple rod-shaped members inserted into the wooden base material and protruding toward the outdoor side of the pillars.

This rod-shaped member penetrates the external insulation. When the external insulation is supported by such a rod-shaped member, the load of the external insulation acts on the rod-shaped member. If the rod-shaped member is sufficiently rigid, shear deformation of the external insulation due to its own weight is suppressed, even if the external insulation is thick or heavy. This makes it easier to maintain its thermal insulation properties.

These rod-shaped members are inserted into wooden base materials. Because wooden base materials are softer than steel base materials, they are easy to insert and secure with various rod-shaped members such as screws, nails, and staples. This allows for the use of a wide variety of rod-shaped members, making them highly versatile.

The fifth aspect of the insulation method includes the steps of fixing and covering two adjacent surfaces of an upper column that forms the upper side of the column with external insulation material, fixing and covering two adjacent surfaces of a lower column that forms the lower side of the column with external insulation material, installing the lower column at a protruding corner of a building, arranging connecting members on the indoor surfaces of the lower column and the indoor surfaces of the upper column to connect the lower column and the upper column and form a column, and covering the two indoor surfaces of the column with internal insulation material to form a continuous insulation layer made up of the external insulation material and the internal insulation material.

In the fifth aspect of the insulation method, the two outdoor surfaces of a column located at a building's corner are covered with external insulation. The two indoor surfaces of the column are also covered with internal insulation. These external and internal insulation materials form a continuous insulation layer. As a result, a continuous insulation layer is formed from the outdoor side of the column to the indoor side at the building's corner. This improves the insulation of the building's corner, where thermal bridges are likely to occur.

In addition, with this insulation method, the timing of installing the insulation material is staggered between the outside and inside. Specifically, the exterior insulation material is placed on the exterior side of each of the lower and upper columns, and the lower and upper columns are connected with connecting members. After that, the interior insulation material is placed on the interior side of each of the lower and upper columns. This process makes it easy to install the connections between the lower and upper columns, i.e., the columns and the insulation material.

In contrast, if the outer and inner insulation materials are formed as a single unit, connecting the lower and upper columns after installing the insulation would be difficult because the connecting members would interfere with the insulation. Alternatively, installing insulation after connecting the lower and upper columns would require setting up scaffolding on the outdoor side of the columns and working from the outside, or reaching out from the indoor side to work from the outdoor side of the columns, making it difficult to work.

Furthermore, when the outer and inner insulation materials are formed as a single unit, the insulation material is bent from the outdoor side of the pillar to the indoor side during installation, which results in a thinner bent portion, which may have inferior insulating properties compared to other portions. In contrast, if the outer and inner insulation materials are formed as separate pieces, this deterioration in insulating properties due to bending can be prevented.

This disclosure provides an insulation structure and insulation method that makes it easy to install pillars and insulation materials.

1 is a plan view illustrating an example of a heat insulating structure according to an embodiment of the present disclosure. 1 is a perspective view showing an example of a connecting structure between a lower column and an upper column in a heat insulating structure according to an embodiment of the present disclosure. FIG. 1A is a side cross-sectional view showing an example of the arrangement of an inner insulating material in a thermal insulation structure according to an embodiment of the present disclosure, and FIG. 1B is a side cross-sectional view showing another example. (A) is a plan view showing the state in which external insulation material is fixed to a column in an insulation method according to an embodiment of the present disclosure; (B) is a plan view showing the state in which an exterior wall panel is fixed to a fixing member; (C) is a plan view showing the state in which an upper column is connected to a lower column using a connecting member; (D) is a plan view showing the state in which internal insulation material is placed in contact with the external insulation material; and (E) is a plan view showing the state in which wall insulation material is placed. FIG. 10 is a plan view showing a first modified example of a fixing member in a heat insulating structure according to an embodiment of the present disclosure. (A) is an oblique view showing the state in which the external insulation material is fixed to the wooden beam in the insulation structure of the first modified example, and (B) is an oblique view showing the state in which the external insulation material is fixed to the pillar. FIG. 10 is a plan view showing a second modified example of the fixing member in the heat insulating structure according to the embodiment of the present disclosure. (A) is an oblique view showing the state in which the needles penetrate the external insulation material in the insulation structure of the second modified example, and (B) is an oblique view showing the state in which the external insulation material is fixed to a pillar. FIG. 10 is a plan view showing a third modified example of the fixing member in the heat insulating structure according to the embodiment of the present disclosure. (A) is an oblique view showing the state in which a rod-shaped member is penetrating the external insulation material in the insulation structure of the third modified example, and (B) is an oblique view showing the state in which the external insulation material is fixed to a pillar.

Hereinafter, thermal insulation structures and thermal insulation methods according to embodiments of the present disclosure will be described with reference to the drawings. Components indicated with the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and multiple components may be present.

Furthermore, explanations of overlapping components and symbols may be omitted in each drawing. Note that this disclosure is not limited to the following embodiments, and may be implemented with appropriate modifications, such as omitting components or replacing them with different components, within the scope of the purpose of this disclosure.

In each figure, the directions indicated by arrows X and Y are directions along a horizontal plane and are perpendicular to each other. Furthermore, the direction indicated by arrow Z is a direction along the vertical direction (up and down). In each figure, the directions indicated by arrows X, Y, and Z are assumed to coincide with each other.

<Thermal insulation structure>
1 shows a thermal insulation structure according to one embodiment of the present disclosure. This thermal insulation structure is applied to an external corner of a steel-framed building 10, and is formed with a column 12, a connecting member 20, an external thermal insulation material 30, a fixing member 40, and an internal thermal insulation material 50. This thermal insulation structure can also be applied to a wooden building.

(pillar)
The columns 12 are steel columns arranged at the corners of the building 10 and are formed using square steel pipes. As shown in Figure 2, the columns 12 are formed to include a lower column 14 and an upper column 16 arranged in the vertical direction.

A steel plate 14A is welded to the upper end surface of the lower column 14. Plate 14A is a plate that closes the opening at the upper end of the lower column 14 and is rectangular in plan view (sight along the X direction).

A fixing piece 14B is formed on each of the two indoor end faces of plate 14A (the two front faces shown in Figure 2). Fixing piece 14B is located on the indoor end face of plate 14A at a position that contacts the outdoor end face.

A bolt hole H1 is formed in the fixed piece 14B. The shape of the fixed piece 14B is not particularly limited as long as it can form the bolt hole H1, but in this embodiment it is approximately rectangular.

Meanwhile, a steel plate 16A is welded to the lower end surface of the upper column 16. Plate 16A is a plate that closes the opening at the lower end of the upper column 16 and is rectangular in plan view.

Fixing pieces 16B are formed on each of the two indoor end faces of plate 16A (the two front faces shown in Figure 2). Fixing pieces 16B are located on the indoor end face of plate 16A in a position that contacts the outdoor end face. Fixing pieces 16B are also located in a position that overlaps fixing piece 14B in a plan view.

A bolt hole H2 is formed in the fixed piece 16B. The shape of the fixed piece 16B is not particularly limited as long as it can form the bolt hole H2, but in this embodiment it is approximately rectangular.

(Connecting member)
The lower pillar 14 and the upper pillar 16 are connected by a connecting member 20. The connecting member 20 includes a bolt 20A and a nut 20B. The connecting member 20 may also include a washer or the like.

The bolt 20A is inserted through the bolt hole H1 formed in the fixed piece 14B of the lower column 14 and the bolt hole H2 formed in the fixed piece 16B of the upper column 16. With the bolt 20A inserted through the bolt holes H1 and H2, the lower column 14 and the upper column 16 are connected by screwing in the nut 20B.

(external insulation)
As shown in Figure 1, the external insulation material 30 is an insulation material that covers two adjacent surfaces on the outdoor side of the column 12, and as an example, is a bag-shaped insulation material formed by covering glass wool, rock wool, etc. with a film.

The outer insulating material 30 does not necessarily have to be formed in a bag shape; it may be formed with exposed fibers without using a film. The outer insulating material 30 may also be an insulating material made of glass wool, rock wool, or the like formed into a plate shape.

The external insulation material 30 is wrapped around the column 12 from one side facing the outdoors (the side along the X direction) to the other side (the side along the Y direction). The external insulation material 30 also covers the entire exterior surface of both sides of the column 12.

Note that "covering the entire surface" refers to a state in which the external insulation material 30 covers the entire surface along the X and Y directions when the column 12 is viewed from above, as shown in Figure 1. In the Z direction, which is the vertical direction, there may be gaps where the external insulation material 30 is not placed.

Furthermore, the outer insulation material 30 is arranged so that the portions along the X direction and the Y direction extend to the outside of the column 12, and these extended portions are arranged in contact with the inner insulation material 50 described below.

Also, as shown in Figure 3, the outer insulation material 30 covering the lower column 14 of the column 12 and the outer insulation material 30 covering the upper column 16 are separate bodies and are arranged in contact with each other.

In addition, as with the insulating materials 30A and 30B described below (see Figure 5), the outer insulating material 30 may be formed into separate members covering the surfaces of the column 12 along the X direction and the surfaces along the Y direction.

(Fixing member)
The fixing member 40 is an adhesive applied to the columns 12 (the lower columns 14 and the upper columns 16). The fixing member 40 is applied to the entire exterior surfaces of both the columns 12. This allows the columns 12 and the external insulation material 30 to come into surface contact with each other.

Note that "coated on the entire surface" refers to a state in which the fixing member 40 is coated on the entire surface along the X and Y directions when the column 12 is viewed in plan, as shown in Figure 1. In the Z direction, which is the vertical direction, there may be intermittent portions where the fixing member 40 is not coated.

(Inner insulation)
The inner insulation material 50 is an insulation material that covers each of two adjacent indoor surfaces of the column 12, and is a bag-shaped insulation material formed by covering glass wool, rock wool, or the like with a film. Note that the inner insulation material 50 does not necessarily have to be formed in a bag shape, and may be one in which the fibers are exposed without using a film.

One and the other indoor surfaces of the pillar 12 are each covered with a separate inner insulation material 50. The inner insulation material 50 is formed as a separate member from the outer insulation material 30 and is positioned in contact with the outer insulation material 30. Note that the inner insulation material 50 does not need to cover the "entire" indoor surface of the pillar 12; it is sufficient that it covers at least the portion closest to the outer insulation material 30.

The inner insulation material 50 is positioned so that it overlaps the connecting member 20 in a plan view. As shown in Figure 3(A), the inner insulation material 50 can be divided at the boundary between the lower column 14 and the upper column 16, and the connecting member 20 can be sandwiched vertically between the lower inner insulation material 50 and the upper inner insulation material 50.

Also, as shown in Figure 3(B), the inner insulation material 50 can be formed continuously at the boundary between the lower column 14 and the upper column 16, and the portions that interfere with the connecting member 20 and the fixing pieces 14B and 16B can be deformed to sandwich the connecting member 20 and the fixing pieces 14B and 16B in the vertical direction.

To deform the inner insulation material 50, a worker can use their fingers to adjust the shape to match the shape of the connecting member 20, or they can make cuts in the inner insulation material 50 to make it easier to deform.

As shown by the two-dot chain line in Figure 1, a beam 18 is joined to the column 12. The inner insulation material 50 can be divided at the part that interferes with the beam 18 or deformed as needed. If the inner insulation material 50 is divided at the part that interferes with the beam 18, the inner insulation material 50 can be placed and held on the beam 18. In other words, the shape of the inner insulation material 50 can be changed as needed depending on the position of the beam 18.

(Other configurations)
An exterior wall panel 60 is disposed on the outdoor side of the column 12. The exterior wall panel 60 is disposed at a distance from the column 12, and an exterior insulation material 30 is disposed between the column 12 and the exterior wall panel 60. The exterior wall panel 60 is fixed to a fixing member 60A. The fixing member 60A is connected to and held in place by a connecting member (not shown) on the column 12 or the beam 18.

In addition, wall insulation materials 62 and 64 are arranged in contact with the inner insulation material 50. The wall insulation materials 62 and 64 are arranged inside the exterior walls (walls facing the outdoors) of the building 10, and are arranged over almost the entire surface of the exterior walls. The wall insulation material 62 is a bag-shaped insulation material, and the wall insulation material 64, arranged outside the wall insulation material 62, is a plate-shaped insulation material.

By arranging the inner insulation material 50 and the wall insulation materials 62 and 64 in contact with each other, insulation material is continuously arranged around the periphery of the building 10, including the corners.

The wall insulation 64 and the exterior wall panel 60 are spaced apart. Additional insulation may or may not be placed in this area.

<Insulation method>
An insulation method for forming the above-mentioned thermal insulation structure will now be described. To form the thermal insulation structure, first, as shown in Figure 4(A), a fixing member 40, which is an adhesive, is applied to two adjacent surfaces of the upper column 16 that forms the upper side of the column 12. The fixing member 40 is applied to the surface that does not have the fixing piece 16B. Then, the external insulation material 30 is fixed to and covers the upper column 16 by this fixing member 40.

Next, as shown in Figure 4(B), the exterior wall panel 60 is fixed to the fixing member 60A. This forms a building unit 10A in which the exterior insulation material 30 is held between the exterior wall panel 60 and the upper column 16, as shown by the two-dot chain line in Figure 4(C). The building unit 10A is a box-shaped unit that includes the protruding corner of the building 10 (see Figure 1), as shown by the two-dot chain line in Figure 4(C), and is manufactured in a factory and transported to the construction site of the building 10.

Although not shown in the figures, external insulation 30 is similarly fixed to and covered on two adjacent surfaces of the lower column 14 (see Figure 2) that forms the underside of the column 12. A building unit including the exterior wall panel 60 is then formed and transported to the construction site of the building 10.

Then, a building unit including the lower column 14 is installed at the protruding corner of the building 10. In other words, a building unit including the lower column 14 is installed, forming the protruding corner of the building 10. Then, a building unit 10A including the upper column 16 is placed above the building unit including the lower column 14. Then, connecting members 20 are placed on the indoor surfaces of the lower column 14 and the indoor surfaces of the upper column 16 to connect the lower column 14 and the upper column 16 and form the column 12.

Next, as shown in Figure 4(D), the two indoor sides of the pillar 12 are covered with inner insulation material 50, and as shown in Figure 4(E), the outer insulation material 30 and the inner insulation material 50 form a continuous insulation layer. After that, wall insulation material 64 and other materials are sequentially placed, and the building 10 is constructed.

<Action and effect>
In the thermal insulation structure of the present disclosure, as shown in Fig. 1, the two outdoor surfaces of a column 12 located at an exterior corner of a building 10 are covered with an exterior insulation material 30. The two indoor surfaces of the column 12 are also covered with an interior insulation material 50. The interior insulation material 50 is disposed in contact with the exterior insulation material 30. As a result, a continuous insulation layer is formed from the outdoor side of the column 12 to the indoor side at the exterior corner of the building 10. This can improve the insulation of the exterior corner of the building 10, where thermal bridges are likely to occur.

In addition, in this thermal insulation structure, the outer insulation material 30 and the inner insulation material 50 are formed separately. Therefore, as explained using Figure 4, the timing of installing the insulation material can be staggered between the outer and inner sides. That is, for example, a process can be adopted in which the outer insulation material 30 is placed on the outdoor side of each of the lower and upper columns 14 and 16 (see Figure 4(A)), the lower and upper columns 14 and 16 are connected with connecting members 20 (see Figure 4(C)), and then the inner insulation material 50 is placed on the indoor side of the lower and upper columns 14 and 16 (see Figure 4(D)). This process facilitates the installation of the connecting portion between the lower and upper columns 14 and 16, i.e., the installation of the columns 12, and the installation of the insulation material (outer insulation material 30 and inner insulation material 50).

In contrast, if the outer insulation material 30 and the inner insulation material 50 are formed as a single unit (comparative example), even if an attempt is made to connect the lower column 14 and the upper column 16 after the insulation material has been installed, the connecting member 20 will interfere with the insulation material, making the connection difficult. Alternatively, even if an attempt is made to install insulation material after connecting the lower column 14 and the upper column 16, it will be necessary to set up scaffolding on the outdoor side of the column 12 and work from the outdoor side, or to reach out from the indoor side to the outdoor side of the column 12, making the work difficult.

Furthermore, when the outer insulation material 30 and the inner insulation material 50 are formed as a single unit (comparative example), the insulation material is bent from the outdoor side of the column 12 to the indoor side, resulting in a thinner bent portion, which may have inferior insulating properties compared to other portions. In contrast, if the outer insulation material 30 and the inner insulation material 50 are formed as separate pieces, as in the present disclosure, this deterioration in insulating properties due to bending can be suppressed.

In addition, in the thermal insulation structure disclosed herein, the fixing member that fixes the external insulation material 30 to the column 12 is adhesive. Because the adhesive is applied in a planar manner, the external insulation material 30 can be supported by a surface against the column 12. This makes it easier to hold the external insulation material 30 stably.

<Modification>
(First Modification)
In the above embodiment, the fixing member 40 is an adhesive, but the embodiment of the present disclosure is not limited to this. For example, as shown in Fig. 5, a fixing member 70 formed of a wooden crosspiece 72 and screws 74 and 76 may be used. Note that the wooden crosspiece 72 is an example of a wooden base material in the present disclosure, and the screw 74 is an example of a rod-shaped member in the present disclosure.

The wooden battens 72 are joined to the pillars 12 using screws 76. Screws 74 are inserted into the wooden battens 72 and protrude to the exterior side of the pillars 12. The screws 74 also penetrate the outer insulation material 30.

In this example, the exterior insulation 30 is divided into insulation 30A, which covers one exterior surface of the pillar 12, and insulation 30B, which covers the other surface, and each insulation 30A and 30B is fixed to the wooden beam 72 using screws 74.

As shown in Figure 6(A), the wooden battens 72 are elongated members that run vertically. The wooden battens 72, to which the insulation material 30B (or 30A) is fixed with multiple screws 74, are then fixed to the pillars 12 with multiple screws 76, as shown in Figure 6(B).

As such, in the thermal insulation structure of the first variant, the fixing member 70 comprises wooden battens 72 as a wooden base material joined to the pillar 12, and multiple rod-shaped screws 74 inserted into the wooden battens 72 and protruding to the outdoor side of the pillar 12.

The screws 74 penetrate the external insulation material 30. When the external insulation material 30 is supported by such screws 74, the load of the external insulation material 30 acts on the screws 74. If the screws 74 are sufficiently rigid, they will prevent the external insulation material 30 from shearing under its own weight, even if the external insulation material 30 is thick or heavy. In other words, the screws 74 are selected to have enough rigidity to prevent the external insulation material 30 from shearing under its own weight. This makes it easier to maintain its thermal insulation properties.

The screws 74 are inserted into the wooden crosspieces 72. Because wooden base materials are softer than steel base materials, they are easy to fasten with various rod-shaped members such as screws, nails, and staples. This means that various types of rod-shaped members can be used in place of the screws 74, making them highly versatile.

(Second Modification)
In the present disclosure, a fixing member 80 as shown in Fig. 7 may be used. The fixing member 80 includes needles 82 and washers 84. The needles 82 are a plurality of rod-shaped members joined to the column 12, protruding to the outdoor side of the column 12, and penetrating the outer insulation material 30.

As shown in Figure 8 (A), the plate-shaped base end of the needle 82 is previously joined to the pillar 12 using adhesive, double-sided tape, or the like, prior to fixing the external insulation material 30. As shown in Figure 8 (B), the tip of the needle 82 is bent vertically and split into two. After the external insulation material 30 is pressed against the tip of the needle 82 to penetrate it, a washer 84 is placed on the side of the external insulation material 30, and the tip of the needle 82 is opened. This fixes the external insulation material 30 to the pillar 12.

In this way, the needles 82 penetrate the external insulation material 30. When the external insulation material 30 is supported by such needles 82, the load of the external insulation material 30 acts on the needles 82. If the needles 82 are sufficiently rigid, the external insulation material 30 is prevented from shearing due to its own weight, even if the external insulation material 30 is thick or heavy. In other words, the needles 82 are selected to have a rigidity sufficient to prevent the external insulation material 30 from shearing due to its own weight. This makes it easier to maintain its thermal insulation properties.

(Third Modification)
In the present disclosure, a fixing member 90 as shown in Fig. 9 may be used. The fixing member 90 is a plurality of rod-shaped members joined to the column 12, protruding toward the exterior side of the column 12, and penetrating the outer insulation material 30. A welding pin is used as the fixing member 90. This welding pin has a needle portion 92 and a head portion 94. The needle portion 92 is a needle-shaped member, and the head portion 94 is a flat-plate-shaped member formed at the tip of the needle portion 92.

As shown in Figure 10 (A), the fixing member 90 is positioned by inserting the needle portion 92 into the external insulation material 30 while the external insulation material 30 is pressed against the column 12. With the tip of the needle portion 92 in contact with the column 12, an electric current is passed through the head portion 94 from outside the external insulation material 30, thereby welding the tip of the needle portion 92 to the column 12. This fixes the external insulation material 30 to the column 12.

In this way, the fixing member 90 penetrates the external insulation material 30. When the external insulation material 30 is supported by such a fixing member 90, the load of the external insulation material 30 acts on the fixing member 90. If the rigidity of the fixing member 90 is sufficiently high, the external insulation material 30 is prevented from shearing due to its own weight, even if the external insulation material 30 is thick or heavy. In other words, the fixing member 90 is selected to have a rigidity sufficient to prevent the external insulation material 30 from shearing due to its own weight. This makes it easier to maintain its thermal insulation properties.

10 Building 12 Pillar 14 Lower Pillar 16 Upper Pillar 20 Connecting Member 20A Bolt (Connecting Member)
20B Nut (connecting member)
30 Outer insulation material 30A Insulation material (outer insulation material)
30B Insulation material (outer insulation material)
40 Fixing member 50 Inner heat insulating material 70 Fixing member 72 Wooden batten (wooden base material)
74 Screw (rod-shaped member)
80 Fixing member 90 Fixing member

Claims (1)

a column disposed at a corner of the building and formed with a lower column and an upper column disposed in the vertical direction;
A connecting member is arranged on the indoor side surface of each of the lower pillar and the upper pillar, and connects the lower pillar and the upper pillar;
An exterior heat insulating material covering two adjacent outdoor surfaces of the pillar;
A fixing member that fixes the outer insulation material to the column;
An inner heat insulating material formed as a separate member from the outer heat insulating material and arranged in contact with the outer heat insulating material to cover two indoor sides of the column;
and
The fixing member is
An insulating structure comprising a plurality of rod-shaped members joined to the pillar and protruding to the outdoor side of the pillar, the rod-shaped members penetrating the outer insulating material .