Thermal insulation repair structure of exterior wall and thermal insulation repair method of exterior wall

Abstract

To provide a heat insulation repair structure of an exterior wall, which can prevent the occurrence of a crack in the exterior wall face material of an existing exterior wall panel in an earthquake occurring after the repair of the exterior wall.SOLUTION: In a heat insulation repair structure of an outer wall, a crosspiece member 2 whose long side direction is turned sideways is fixed by a drill screw 3 to a lower part on the outdoor side of an existing outer wall panel 1 in which an outer wall surface material 11 is fixed to a frame 12, a heat insulation material 21 is arranged above the crosspiece member 2, and a new outer wall surface material 23 is attached to the outdoor side of the heat insulation material 21, the width of the outer wall surface material 11 is set to P, and the crosspiece member 2 is fixed by the drill screw 3 positioned in a place respectively separated by substantially P / 4 to both width directional end sides of the outer wall surface material 11 from the width directional central position of the outer wall surface material 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to an exterior wall insulation renovation structure and an exterior wall insulation renovation method in which insulation material is provided on the outdoor side of an existing exterior wall and a new exterior wall surface material is attached to the outdoor side of the insulation material. [Background technology]

[0002] Figure 4 is a schematic explanatory diagram showing a conventional insulation renovation structure for an exterior wall. In this insulation renovation structure for an exterior wall, 90 mm high crosspiece members 2 made of square timber or the like are attached with their long sides facing horizontally to the lower surface of the exterior wall facing material 11 of an existing exterior wall panel 1 fixed on a base 5. Heat insulating material 21 is placed on the crosspiece members 2. In addition, flashing 22 can be fixed to the crosspiece members 2. A new exterior wall facing material 23 is fixed to vertical furring strips 24 fixed to the outdoor side of the heat insulating material 21.

[0003] The crosspiece members 2 are placed against the lower surface of the exterior wall facing material 11 and fixed to the lower frame portion 12a of the metal frame 12 of the existing exterior wall panel 1 by drill screws 3, which are fixing members driven from the exterior side. As shown in Fig. 5, the length of the crosspiece members 2 is 2P, where P is the width of the exterior wall panel 1 (e.g., 910 mm), and a total of three drill screws 3 are driven into each exterior wall panel 1, two at both ends and one in the center.

[0004] Patent Document 1 discloses an insulation renovation structure for building exterior walls that can improve the insulation properties of the building exterior walls by retrofitting insulation materials appropriately according to the insulation performance of the existing exterior walls. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-84095 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the above-described exterior wall insulation renovation structure, there was a risk that the exterior wall surface material 11 would crack in an earthquake that occurred after the renovation. Specifically, as shown in Figure 6, due to inter-story deformation of the building during an earthquake, the frame 12 deforms into a parallelogram, while the exterior wall surface material 11 tends to rotate while remaining rectangular. If the crosspiece members 2 are firmly fixed to the lower frame portion 12a of the exterior wall surface material 11 with the drill screws 3, the crosspiece members 2 cannot follow the rotation of the exterior wall surface material 11, and there was a risk that the exterior wall surface material 11 of the existing exterior wall panel 1 would crack at the fixed positions of the crosspiece members 2.

[0007] Incidentally, Patent Document 1 does not disclose any technology for preventing cracks in the exterior wall surface material 11 in the event of an earthquake that occurs after such repairs.

[0008] In view of the above circumstances, this invention aims to provide an insulation renovation structure for exterior walls that can prevent cracks from occurring in the exterior wall surface material of existing exterior wall panels in the event of an earthquake that occurs after the exterior wall has been renovated. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the insulation renovation structure for exterior walls of this invention is an insulation renovation structure for exterior walls in which batten members with their long sides oriented horizontally are fixed by fixing members to the lower outdoor portion of an existing exterior wall panel to which an exterior wall surface material is fixed to a frame, insulation material is placed above the batten members, and a new exterior wall surface material is attached to the outdoor side of the insulation material, characterized in that, when the width of the exterior wall surface material is P, the batten members are fixed by the fixing members located approximately P / 4 away from the center position of the width of the exterior wall surface material on both ends of the width of the exterior wall surface material.

[0010] With the above configuration, the batten members are not fixed by the fixing members at both ends of the width direction of the exterior wall surface material. Therefore, compared to conventional structures in which the batten members are fixed by the fixing members at both ends of the width direction of the exterior wall surface material, in the event of an earthquake, the batten members are more likely to follow the rotation of the exterior wall surface material, and it is possible to prevent the exterior wall surface material of existing exterior wall panels from cracking at the positions where the batten members are fixed.

[0011] The length of the batten members in the long side direction may be approximately the same as the width P of the exterior wall surface material, and the batten members may be fixed individually to each exterior wall surface material by the fixing members. In this way, compared to a conventional structure in which the length of the batten members in the long side direction is twice the width P of the exterior wall surface material, in the event of an earthquake, the batten members having a length approximately the same as the width P of the exterior wall surface material are more likely to follow the rotation of the exterior wall surface material, and cracking of the exterior wall surface material of the existing exterior wall panel can be prevented at the positions where the batten members are fixed.

[0012] The fixing members may penetrate the exterior wall surface material on the lower side of the lower frame portion of the frame and be fixed to a plate member located on the indoor side of the exterior wall surface material. This weakens the force that fixes the crosspiece members compared to a conventional structure in which the fixing members are fixed to the frame, making it easier for the crosspiece members to follow the rotation of the exterior wall surface material in the event of an earthquake, thereby preventing the exterior wall surface material of the existing exterior wall panel from cracking at the positions where the crosspiece members are fixed.

[0013] The lower ends of the crosspieces may be substantially flush with the lower ends of the exterior wall surface materials, and the distance from the lower ends of the crosspieces to the fixing members may be substantially the same as the distance from the fixing members to the upper ends of the crosspieces. This allows the crosspieces to be made lower than those used in conventional structures, thereby reducing material costs, and by driving the fixing members into the substantially central positions in the height direction of the low-height crosspieces, the fixing members can be easily inserted into the lower side of the lower frame portion.

[0014] Furthermore, the insulation renovation structure for exterior walls of this invention is an insulation renovation structure for exterior walls in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel to which an exterior wall surface material is fixed to a frame, an insulating material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulating material, characterized in that the width of the exterior wall surface material is P, the length of the batten member in the long side direction is approximately the same as the width P of the exterior wall surface material, and the batten member is fixed individually to each exterior wall surface material by the fixing member.

[0015] With the above configuration, compared to the conventional structure in which the length of the batten member in the long side direction is twice the width P of the exterior wall surface material, in the event of an earthquake, the batten member, which is approximately the same as the width P of the exterior wall surface material, is more likely to follow the rotation of the exterior wall surface material, and cracking of the exterior wall surface material of the existing exterior wall panel can be prevented at the position where the batten member is fixed.

[0016] In the above configuration, the fixing member may penetrate the exterior wall surface material on the downward side of the lower frame portion of the frame and be fixed to a plate material located on the indoor side of the exterior wall surface material. Also, the lower end of the crosspiece member may be substantially flush with the lower end of the exterior wall surface material, and the distance from the lower end of the crosspiece member to the fixing member may be substantially the same as the distance from the fixing member to the upper end of the crosspiece member.

[0017] In addition, the insulation renovation structure for exterior walls of this invention is an insulation renovation structure for exterior walls in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel to which an exterior wall surface material is fixed to a frame, an insulating material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulating material, and is characterized in that the fixing member penetrates the exterior wall surface material on the side that is detached downward from the lower frame portion of the frame and is fixed to a plate material located on the indoor side of the exterior wall surface material.

[0018] With the above configuration, the force fixing the batten members is weaker than in conventional structures in which the fixing members are fixed to the frame, and in the event of an earthquake, the batten members are more likely to follow the rotation of the exterior wall surface material, thereby preventing the exterior wall surface material of existing exterior wall panels from cracking at the positions where the batten members are fixed.

[0019] In addition, in the above configuration, the lower end of the batten member may be approximately flush with the lower end of the exterior wall surface material, and the distance from the lower end of the batten member to the fixing member may be approximately the same as the distance from the fixing member to the upper end of the batten member.

[0020] In addition, the insulation renovation method for exterior walls of this invention is a method for constructing an insulation renovation structure for exterior walls in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel having an exterior wall surface material fixed to a frame, an insulating material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulating material, and is characterized in that the batten member is fixed so that it can easily follow the rotation of the exterior wall surface material fixed to the frame. [Effects of the Invention]

[0021] The present invention has the effect of preventing cracks from occurring in the exterior wall surface material of existing exterior wall panels in the event of an earthquake that occurs after the exterior walls have been renovated. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a partially cutaway perspective view of an exterior wall insulation repair structure according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic front view of the insulation renovation structure for the exterior wall shown in FIG. 1. [Figure 3] FIG. 2 is an explanatory diagram showing the state of the insulation renovation structure of the exterior wall shown in FIG. 1 during an earthquake. [Figure 4] FIG. 1 is a partially cutaway perspective view of a conventional exterior wall insulation repair structure. [Figure 5] FIG. 5 is a schematic front view of the insulation renovation structure for the exterior wall shown in FIG. 4. [Figure 6]FIG. 5 is an explanatory diagram showing the state of the insulation renovation structure of the exterior wall shown in FIG. 4 during an earthquake. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. For the sake of convenience, the reference numerals given to the components in the accompanying drawings are the same as those used in the prior art.

[0024] As shown in Figures 1 and 2, in the exterior wall insulation renovation structure and exterior wall insulation renovation method of this embodiment, 45 mm high crosspiece members 2 made of square timber or the like are attached with their long sides facing horizontally to the lower surface of the exterior wall facing material 11 of an existing exterior wall panel 1 fixed to a base 5. Heat insulating material 21 is placed on the crosspiece members 2. In addition, flashing 22 is fixed to the crosspiece members 2. A new exterior wall facing material 23 is fixed to vertical furring strips 24 (or horizontal furring strips) fixed to the outdoor side of the heat insulating material 21. The flashing 22 may also be fixed to the vertical furring strips 24.

[0025] The crosspiece member 2 is placed against the lower surface of the exterior wall surface material 11 and fixed with a drill screw 3, which is a fixing member driven from the exterior side.

[0026] The drill screw 3 penetrates the exterior wall surface material 11 on the downward side of the lower frame portion 12a of the rectangular frame 12 of the existing exterior wall panel 1, and is fixed to a plywood 11a (board material) located on the indoor side of the exterior wall surface material 11 (this is referred to as the first structure). In this example, an iron plate serving as a base cover is present at the position where the plywood 11a is arranged, and the drill screw 3 is driven into this iron plate.

[0027] The lower end of the crosspiece member 2 is substantially flush with the lower end of the exterior wall surface material 11, and the distance from the lower end of the crosspiece member 2 to the drill screw 3 is substantially the same as the distance from the drill screw 3 to the upper end of the crosspiece member 2. In other words, the drill screw 3 is driven into the crosspiece member 2 at approximately the center in the up-down direction.

[0028] The length of the crosspiece member 2 is approximately P, where P is the width of the exterior wall panel 1 (e.g., 910 mm) (this is referred to as the second structure). Note that approximately P is, for example, in the range of P±100 mm, and preferably P±50 mm. The length of the crosspiece member 2 attached to one exterior wall panel 1 can be P+100 mm, and the length of the crosspiece member 2 attached to the adjacent exterior wall panel 1 can be P-100 mm.

[0029] The drill screws 3 are driven into positions approximately P / 4 away from the widthwise center of the exterior wall surface material 11 on both widthwise ends of the exterior wall surface material 11 (this is referred to as a third structure). In this example, a total of two drill screws 3 are driven into positions 227.5 mm away from each end of the crosspiece member 2. Note that approximately P / 4 is, for example, within the range of P / 4±100 mm, preferably P / 4±50 mm.

[0030] In the exterior wall insulation renovation structure configured as above, the drill screws 3 are driven into positions approximately P / 4 away from the center position of the exterior wall surface material 11 in the width direction on both ends of the exterior wall surface material 11 in the width direction, and the crosspiece members 2 are not fixed by the drill screws 3 at both ends of the width direction of the exterior wall surface material 11. Therefore, compared to a conventional structure in which the crosspiece members 2 are fixed by the drill screws 3 at both ends of the width direction of the exterior wall surface material 11, in the event of an earthquake, as shown in Figure 3, the crosspiece members 2 are more likely to follow the rotation of the exterior wall surface material 11, and it is possible to prevent the exterior wall surface material 11 of the existing exterior wall panel 1 from cracking at the fixed positions of the crosspiece members 2.

[0031] Furthermore, the length of the batten members 2 in the long side direction is approximately the same as the width P of the exterior wall surface material 11, and the batten members 2 are fixed individually to each exterior wall surface material 11 with drill screws 3. Therefore, compared to conventional structures in which the length of the batten members 2 in the long side direction is twice the width P of the exterior wall surface material 11, in the event of an earthquake, the batten members 2, which are approximately the same as the width P of the exterior wall surface material 11, are more likely to follow the rotation of the exterior wall surface material 11, and this makes it possible to prevent the exterior wall surface material 11 of the existing exterior wall panel 1 from cracking at the positions where the batten members 2 are fixed.

[0032] Furthermore, the drill screw 3 penetrates the exterior wall surface material 11 on the side that is detached downward from the lower frame portion 12a of the frame 12 and is fixed to the plywood 11a located on the indoor side of the exterior wall surface material 11. Therefore, compared to the conventional structure in which the drill screw 3 is fixed to the lower frame portion 12a, the force fixing the crosspiece member 2 is weaker, and in the event of an earthquake, the crosspiece member 2 can more easily follow the rotation of the exterior wall surface material 11, thereby preventing the exterior wall surface material 11 of the existing exterior wall panel 1 from cracking at the position where the crosspiece member 2 is fixed.

[0033] Furthermore, the lower end of the crosspiece member 2 is approximately flush with the lower end of the exterior wall surface material 11, and the distance from the lower end of the crosspiece member 2 to the drill screw 3 is approximately the same as the distance from the drill screw 3 to the upper end of the crosspiece member 2. Therefore, the height can be made lower than that of the crosspiece member 2 used in conventional structures, reducing material costs, and by driving the drill screw 3 into approximately the center of the height of this low-height crosspiece member 2, the drill screw 3 can easily be passed through to the side of the lower frame portion 12a that is located below it.

[0034] The insulation renovation structure for an exterior wall according to the present invention is not limited to the above-described embodiment. In other words, the insulation renovation structure for an exterior wall according to the present invention only needs to make it easier for the crosspiece members 2 to follow the rotation of the exterior wall surface material 11 compared to the conventional structure shown in Fig. 4, and therefore can be an insulation renovation structure having only the first structure (a structure in which the structure shown in Fig. 5 is modified by applying only the first structure), an insulation renovation structure having only the second structure (a structure in which the structure shown in Fig. 5 is modified by applying only the second structure), or an insulation renovation structure having only the third structure (a structure in which the structure shown in Fig. 5 is modified by applying only the third structure). Furthermore, the insulation renovation structure for an exterior wall according to the present invention can be an insulation renovation structure comprising only the first structure and the second structure (a structure in which only the first structure and the second structure are applied and modified in the structure shown in Figure 5), an insulation renovation structure comprising only the first structure and the third structure (a structure in which only the first structure and the third structure are applied and modified in the structure shown in Figure 5), or an insulation renovation structure comprising only the second structure and the third structure (a structure in which only the second structure and the third structure are applied and modified in the structure shown in Figure 5).

[0035] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0036] 1: Exterior wall panel 2: Crosspiece 3: Drill screws 5: Base 11: Exterior wall surface material 11a: Plywood 12: Frame 12a: Lower frame part 21: Insulation material 22: Drainer 23: Exterior wall surface material 24: Vertical furring strip

Claims

1. This is an exterior wall insulation renovation structure in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel to which an exterior wall surface material is fixed to a frame, insulation material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulation material, wherein the width of the exterior wall surface material is P, and the batten member is fixed by the fixing member located approximately P / 4 away from the center position of the width direction of the exterior wall surface material on both ends of the width direction of the exterior wall surface material.

2. In the insulation renovation structure for an exterior wall described in claim 1, the length of the batten members in the long side direction is approximately the same as the width P of the exterior wall surface material, and the batten members are fixed individually to each exterior wall surface material by the fixing members.

3. In the insulation renovation structure for an exterior wall described in claim 1 or claim 2, the fixing member penetrates the exterior wall surface material on the downward side of the lower frame portion of the frame and is fixed to a plate material located on the indoor side of the exterior wall surface material.

4. In the insulation renovation structure for an exterior wall described in claim 3, the lower end of the batten member is approximately flush with the lower end of the exterior wall surface material, and the distance from the lower end of the batten member to the fixing member is approximately the same as the distance from the fixing member to the upper end of the batten member.

5. An insulation renovation structure for an exterior wall in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel having an exterior wall surface material fixed to a frame, insulation material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulation material, wherein the width of the exterior wall surface material is P, the length of the batten member in the long side direction is approximately the same as the width P of the exterior wall surface material, and the batten member is fixed individually to each exterior wall surface material by the fixing member.

6. In the insulation renovation structure for an exterior wall described in claim 5, the fixing member penetrates the exterior wall surface material on the downward side of the lower frame portion of the frame and is fixed to a plate material located on the indoor side of the exterior wall surface material.

7. In the insulation renovation structure for an exterior wall described in claim 6, the lower end of the batten member is approximately flush with the lower end of the exterior wall surface material, and the distance from the lower end of the batten member to the fixing member is approximately the same as the distance from the fixing member to the upper end of the batten member.

8. An insulation renovation structure for an exterior wall in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel to which an exterior wall surface material is fixed to a frame, insulation material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulation material, characterized in that the fixing member penetrates the exterior wall surface material on the side that is detached downward from the lower frame portion of the frame and is fixed to a plate material located on the indoor side of the exterior wall surface material.

9. In the insulation renovation structure for an exterior wall described in claim 8, the lower end of the batten member is approximately flush with the lower end of the exterior wall surface material, and the distance from the lower end of the batten member to the fixing member is approximately the same as the distance from the fixing member to the upper end of the batten member.

10. A method for constructing an exterior wall insulation renovation structure in which a batten member with its long side oriented horizontally is fixed by a fixing member to the lower outdoor portion of an existing exterior wall panel in which an exterior wall surface material is fixed to a frame, insulation material is placed above the batten member, and a new exterior wall surface material is attached to the outdoor side of the insulation material, characterized in that the batten member is fixed so that it can easily follow the rotation of the exterior wall surface material fixed to the frame.

Images