Corner structure and its construction method

Abstract

This invention provides a rational corner structure and its construction method that offers excellent design, ease of construction, and durability, or a structure that can be manufactured at low cost. [Solution] The corner structure 1 is constructed by bringing the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4 close together. A recess 4d is formed along the second end 4c on the back surface 4b of the second building panel 4 that faces the first end 3c of the first building panel 3. The corner structure 1 further includes a region forming tool 5. The region forming tool 5 has an extension portion 5d that extends from the back surface 3b side of the first building panel 3 into the recess 4d. A region that can be filled with sealant is formed by the region forming tool 5, surrounded by the extension portion 5d, the bottom surface 4e located within the recess 4d and facing the first end 3c, and the first end 3c. The region forming tool 5 is fixed to the first building panel 3.

Description

Technical Field

[0001] The present invention relates to an external corner structure formed by bringing the ends of two building panels close to each other and a construction method thereof.

Background Art

[0002] At the corner of a building, since two outer wall materials (building panels) are abutted so as to be substantially orthogonal, a gap is likely to occur. Therefore, an external corner structure is used to reduce the gap. As the external corner structure, a homogeneous external corner and a heterogeneous external corner are known. For the homogeneous external corner, two building panels made of the same material as the siding material of the outer wall are used. For example, building panels made of the same material as the siding material of the ceramic, metal, wood, or resin type are used. On the other hand, for the heterogeneous external corner, two building panels made of different materials are used. For example, for the ceramic siding material, a metal external corner made of metal is used.

[0003] Furthermore, conventionally, an external corner structure that does not use a homogeneous external corner or a heterogeneous external corner is also known. In the external corner structure of Patent Document 1, a joiner that connects the substantially orthogonal building panels and closes the gap is used. The joiner has an L shape having a bent portion and has a pair of fixing pieces. The pair of fixing pieces are respectively fixed to the building frame. A locking portion that projects outward is formed in the bent portion. The locking portion is inserted into a groove formed at the back end of one building panel and is locked to one building panel. Sealing is filled into the groove from the side of one building panel.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Corner joint structures require further improvement. For example, there has been a need for rational corner joint structures that offer superior aesthetics, ease of construction, and durability, or structures that can be manufactured inexpensively. [Means for solving the problem]

[0006] According to one feature of this disclosure, the corner structure is configured with the first end of a first building panel and the second end of a second building panel in close proximity. A recess is formed on the back surface of the second building panel facing the first end of the first building panel, along the second end. The corner structure further includes a region-forming device. The region-forming device includes an extension that extends from the back side of the first building panel into the recess. The region-forming device forms a sealable region enclosed by the extension, the bottom surface within the recess facing the first end, and the first end. The region-forming device is fixed to the first building panel.

[0007] Therefore, the extension of the area-forming device is positioned between the first end of the first building panel and the second end of the second building panel. Moreover, by utilizing the extension, a sealable area is formed between the first and second ends. As a result, direct contact between the building panels is suppressed, and damage to the building panels can be prevented. Furthermore, the area-forming device is fixed to the first building panel. Therefore, even in structures where fixing components is difficult due to the thickness of the second building panel, the area-forming device can be fixed. And because it is fixed to only one side of the pair of building panels, the installation time is also reduced. Furthermore, the area-forming device can be made simpler in structure or smaller compared to conventional L-shaped joiners. And the area-forming device allows the sealable area to be made to a desired size or shape. As a result, the amount of sealant to be filled can be reduced, or the sealing time can be shortened.

[0008] According to other features of this disclosure, the width of the bottom surface of the recess in the thickness direction of the first building panel is wider than the thickness of the first end of the first building panel. Therefore, the first end can be reliably positioned facing the recess. And the extension of the region forming tool extending from the first end can be reliably inserted into the recess. Thus, the corner structure can be easily constructed.

[0009] According to other features of this disclosure, the extension of the area forming tool has a first surface, a second surface, and a third surface. The first surface extends from the back side of the first building panel to the front side of the first building panel along the first end. The second surface extends from the first surface toward the bottom surface. The third surface extends from the second surface along the bottom surface and opposite the first surface. Therefore, the third surface extends toward the opposite side of the sealing filling area. Moreover, the third surface is along the bottom surface of the recess and is in contact with or close to the bottom surface. Therefore, when sealing is filled into the sealing filling area, the third surface extending from the second surface can prevent the sealing from going beyond the tip of the second surface to the back side. Furthermore, the area forming tool has a simple structure having a first surface, a second surface, and a third surface. Therefore, conventional products can be reused, for example, a construction member called a single hat joiner can be reused.

[0010] According to other features of this disclosure, the recess has an upright surface that rises from the bottom surface toward the first end. Therefore, the recess is configured to be easily machined. Alternatively, the recess can be easily formed without the use of special cutting tools.

[0011] According to other features of this disclosure, the area forming tool has a third surface tip that is close to the upright surface to such an extent that the tip of the third surface contacts the upright surface when filling with sealant. Therefore, when filling with sealant, the elastic deformation of the extension portion of the area forming tool can be suppressed, which can prevent the sealant filling area from becoming larger. As a result, it is possible to suppress the amount of sealant that needs to be filled. Alternatively, the deformation of the extension portion can prevent the sealant from leaking into the interior.

[0012] According to other features of this disclosure, the length of the second surface in the thickness direction of the second building panel is shorter than the thickness of at least one of the first and second building panels. Therefore, the width of the sealing, which depends on the length of the second surface, is reduced. As a result, the original surface area of ​​the exterior wall is increased, and superior design quality is achieved. Furthermore, because the second surface is short, the sealing area is small, and the amount of sealing required is reduced.

[0013] According to other features of this disclosure, the second surface is covered with a coating that is non-adherent to the sealant. Therefore, the sealant does not adhere to the second surface. On the other hand, one end of the sealant facing the second surface adheres to the second building panel, which is the bottom surface of the recess. The other end of the sealant adheres to the first end of the first building panel. Therefore, when a tensile or compressive force is applied between the first and second building panels, the sealant can deform without being hindered by the second surface. This prevents the sealant from breaking due to localized stress.

[0014] According to other features of this disclosure, the area forming device has a fixing portion that abuts against the back surface of the first building board and is fixed to the first building board. Therefore, the area forming device can be easily fixed to the first building board with a simple structure.

[0015] According to other features of this disclosure, the construction method for the corner structure comprises a building panel placement step, a region forming device fixing step, and a sealing filling step. The corner structure is constructed by bringing the first end of the first building panel and the second end of the second building panel close together. In the building panel placement step, the first building panel is placed so that its first end faces a recess formed at the second end of the second building panel. In the region forming device fixing step, a region forming device having an extension that is inserted into the recess is fixed to the first building panel before the building panel placement step. In the sealing filling step, sealant is filled into the region enclosed by the extension of the region forming device, the bottom surface located in the recess and facing the first end, and the first end of the first building panel.

[0016] Therefore, the extending portion of the region forming tool is located between the first end portion of the first building board and the second end portion of the second building board. Moreover, a region that can be filled with a sealant is formed between the first end portion and the second end portion by using the extending portion. Therefore, direct contact between the building boards is suppressed, and damage to the building boards can be suppressed. Moreover, the region forming tool is fixed to the first building board. Therefore, even if the structure makes it difficult to fix parts because the second building board is thick or the like, the region forming tool can be fixed. And since it is fixed only to one side of the pair of building boards, the construction labor is also small. Furthermore, the region forming tool can have a simple structure or be made small as compared with a conventional L-shaped joiner. And the region that can be filled with a sealant can be made into a desired size or shape by the region forming tool. Therefore, the filling amount of the sealing material can be reduced. Or the sealant filling time can be shortened.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view seen from the outdoor side of the corner structure according to the embodiment. [Figure 2] It is a plan view schematically showing the corner structure according to the embodiment. [Figure 3] It is a view showing the region forming tool according to the embodiment. [Figure 4] It is a view showing an example before the concave portion is formed in the second end portion of the second building board. [Figure 5] It is a view showing an example in which the concave portion is formed in the second end portion of the second building board. [Figure 6] It is a view showing an example in which the region forming tool according to another embodiment is arranged. [Figure 7] It is a view showing an example in which the region forming tool according to another embodiment is arranged. [Figure 8] It is a view showing an example in which the region forming tool according to another embodiment is arranged. [Figure 9] It is a view showing an example in which the region forming tool according to another embodiment is arranged.

Mode for Carrying Out the Invention

[0018] <Configuration of the corner structure> Hereinafter, embodiments of the present invention will be described in accordance with FIGS. 1 to 5. As shown in FIGS. 1 and 2, the corner structure 1 according to this embodiment includes a first building board 3 and a second building board 4 that are arranged substantially orthogonally in a building. The corner structure 1 is configured by bringing the first end 3c of the first building board 3 close to the second end 4c of the second building board 4. The first building board 3 and the second building board 4 are joined via a region forming tool 5 and a sealing material 6. On the indoor side of the first building board 3 and the second building board 4, an outer surface material 12 and an inner surface material 13 are arranged in order from the outdoor side toward the indoor side. The two building boards 3 and 4 are fixed to the building structure 7 by wall fixing tools composed of fasteners 9 and screws 10, respectively.

[0019] The first building board 3 and the second building board 4 are each, for example, substantially rectangular building boards for constructing the outer wall of a building, and are, for example, horizontally long rectangular shapes. The first building board 3 and the second building board 4 are, for example, outer wall materials made of a ceramic base material manufactured by press-molding a raw material made of cement or the like. In addition, metal-based wall materials, wood-based wall materials, resin-based wall materials, etc. can be appropriately selected. Also, the sizes and thicknesses of the first building board 3 and the second building board 4 are set as appropriate.

[0020] As shown in FIG. 2, the first building board 3 has a first end 3c that is a side end on the side of the second building board 4. The first end 3c is a region including the edge of the first building board 3, and the edge corresponds to a corner portion. The first end 3c is configured to be exposed. Also, as shown in FIG. 1, the first building board 3 includes an upper joining portion 3h at the upper end and a lower joining portion (not shown) at the lower end. The upper joining portion 3h has a thickness of about half of the thickness of the first building board 3 by cutting the surface side of the upper end, and constitutes a back side region. The lower joining portion has a thickness of about half of the thickness of the first building board 3 by cutting the back side of the lower end, and constitutes a front side region. With such a configuration, when a plurality of first building boards 3 are constructed adjacent to each other in the vertical direction, the upper joining portion 3h and the lower joining portion are fitted together to form the vertical joining portion of the first building board 3.

[0021] As shown in Figure 2, the second building panel 4 has a second end portion 4c, which is the side end portion on the first building panel 3 side. The second end portion 4c is a region that includes the edge of the second building panel 4, and the edge corresponds to the corner portion. The surface 4a side of the second end portion 4c is chamfered. On the back surface 4b of the second building panel 4, which is opposite the first end portion 3c of the first building panel 3, a recess 4d is formed along the second end portion 4c. The recess 4d has a bottom surface 4e that is opposite the first end portion 3c of the first building panel 3 and an upright surface 4f that rises from the bottom surface 4e toward the first end portion 3c. The width of the bottom surface 4e of the recess 4d in the thickness direction of the first building panel 3 is set to be wider than the thickness of the first end portion 3c of the first building panel 3.

[0022] As shown in Figure 1, the second building panel 4, like the first building panel 3, is provided with an upper joint portion 4h at its upper end and a lower joint portion (not shown) at its lower end. The upper joint portion 4h has a thickness of approximately half that of the first building panel 3, due to the surface side of its upper end being cut, and constitutes the back side region. The lower joint portion has a thickness of approximately half that of the second building panel 4, due to the back side of its lower end being cut, and constitutes the front side region. With this configuration, when multiple second building panels 4 are installed adjacent to each other in the vertical direction, the upper joint portion 4h and the lower joint portion fit together to form the upper and lower joint portion of the second building panel 4.

[0023] As shown in Figures 2 and 3, the region forming tool 5 comprises a fixing part 5a and an extension part 5d. The region forming tool 5 is, for example, a single hat joiner. The fixing part 5a abuts against the back surface 3b of the first building board 3 and is fixed to the first building board 3. The extension part 5d extends from the back surface 3b side of the first building board 3 into the recess 4d of the second building board 4. The extension part 5d is composed of a first surface 5e, a second surface 5f, and a third surface 5h. The first surface 5e extends from the back surface 3b side of the first building board 3 to the front surface 3a side of the first building board 3 along the first end part 3c. The second surface 5f extends from the first surface 5e to the bottom surface 4e side of the recess 4d. The third surface 5h extends from the second surface 5f along the bottom surface 4e and opposite the first surface 5e. The area forming tool 5 forms a sealing-fillable area surrounded by the extension 5d, the bottom surface 4e of the recess 4d, and the first end portion 3c. The area forming tool 5 is fixed to the first building board 3 by screws 8.

[0024] As shown in Figure 2, the tip of the third surface 5h of the area forming tool 5 is close to the upright surface 4f of the second building panel 4 to the extent that the tip of the third surface 5h comes into contact with the upright surface 4f of the second building panel 4 when filling with the sealing material 6 (sealant). The second surface 5f of the area forming tool 5 is covered with a coating that is non-adherent to the sealing material 6.

[0025] The wall fastener consists of a fastener 9 and a screw 10. For example, a ventilation fastener is selected for the fastener 9. The fastener 9 has a screw hole and a fixing portion 9a that abuts against the outdoor surface of the outer material 12, and a locking portion 9b that protrudes outward from the fixing portion 9a. The screw 10 is inserted through the screw hole of the fastener 9, penetrates the outer material 12 and the inner material 13 from the outdoor side, and reaches the building structure 7. The fasteners 9 are located between the first building panel 3 and the outer material 12, and between the second building panel 4 and the outer material 12, respectively. That is, a ventilation layer is formed between the first building panel 3 and the second building panel 4 and the outer material 12. The locking portion 9b of the fastener 9 is located at the upper and lower joints of the first building panel 3 and the upper and lower joints of the second building panel 4, respectively.

[0026] Two exterior panels 12 are arranged on the indoor side of the first building panel 3 and the second building panel 4, butting against each other at approximately right angles. The exterior panels 12 are roughly rectangular plate-like members, for example, horizontally elongated rectangles. The exterior panels 12 are made from fire-resistant materials such as gypsum board (e.g., reinforced gypsum board) or calcium silicate board. The exterior panels 12 are arranged so that no gap is formed between them and the interior panels 13 on the indoor side.

[0027] On the indoor side of the exterior material 12, two interior materials 13 are arranged butted against each other at approximately right angles. The interior materials 13 are roughly rectangular plate-like members, for example, horizontally elongated rectangles. The interior materials 13 are made from fire-resistant materials such as gypsum board (e.g., reinforced gypsum board) or calcium silicate board. The indoor side of the interior materials 13 is in contact with the building structure 7.

[0028] The second building panel 4 may be made using an exterior wall material with unfinished edges on both sides, as shown in Figures 4 and 5, and a recess 4d may be formed at the second end 4c of the second building panel 4. Alternatively, an exterior wall material with pre-formed left and right joints may be used. That is, the recess 4d may be formed by utilizing a joint that constitutes the front area by cutting the back side of either the left or right end. Furthermore, the first building panel 3 may be made by cutting the side ends of an exterior wall material with pre-formed left and right joints to form an unfinished first end 3c.

[0029] If the surface 3a of the first building panel 3 and the surface 4a of the second building panel 4 have different color schemes, the portion of the second end 4c of the second building panel 4 that is flush with the surface 3a of the first building panel 3 may be given the same color scheme as the surface 3a of the first building panel 3. This makes it possible to unify the color scheme on the side of the corner structure 1 where the first building panel 3 is placed, which can improve the aesthetic appearance.

[0030] <Construction process for corner structures> Next, a construction method for the corner structure 1 according to the above embodiment will be described. The construction process for the corner structure 1 comprises a building panel arrangement process, a region forming tool fixing process, and a sealing filling process. The corner structure 1 comprises a first building panel 3 and a second building panel 4 arranged substantially perpendicular to each other, with the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4 being positioned close together. The first building panel 3 and the second building panel 4 are fixed to the building structure 7. Between the two building panels and the building structure 7, an exterior material 12 and an interior material 13 are arranged in order from the outdoor side to the indoor side.

[0031] The area-forming device fixing step involves fixing the area-forming device 5 to the first building panel 3 before the building panel placement step. The area-forming device 5 is fixed by screws 8 with the fixing portion 5a in contact with the back surface 3b of the first building panel 3. The extension portion 5d of the area-forming device 5 extends from the first end portion 3c. The second surface 5f of the area-forming device 5 is covered with a coating that is non-adherent to the sealing material 6.

[0032] The building panel placement process involves positioning the first building panel 3 so that its first end 3c faces a recess 4d formed in the second end 4c of the second building panel 4. The extension 5d of the area forming tool 5 is inserted into the recess 4d of the second building panel 4. The first building panel 3 is fixed to the building structure 7 by fasteners 9 and screws 10. The fasteners 9 are positioned between the first building panel 3 and the exterior material 12. The fixing portion 9a of the fasteners 9 abuts against the exterior surface 12. The screws 10 are inserted through the screw holes of the fasteners 9, penetrate the exterior material 12 and the interior material 13 from the exterior side, and reach the building structure 7. The locking portion 9b of the fasteners 9 is fitted into the upper joint portion 3h of the lower first building panel 3. The lower joint portion of the upper first building panel 3 is locked into the locking portion 9b.

[0033] The second building panel 4 is fixed to the building structure 7 by fasteners 9 and screws 10, in the same manner as the first building panel 3. The fasteners 9 are located between the first building panel 3 and the exterior material 12. The fixing portion 9a of the fasteners 9 abuts against the exterior surface of the exterior material 12. The screws 10 are inserted through the screw holes of the fasteners 9, pass through the exterior material 12 and the interior material 13 from the exterior side, and reach the building structure 7. The locking portion 9b of the fasteners 9 fits into the upper joint portion 4h of the lower second building panel 4. The lower joint portion of the upper second building panel 4 is locked into the locking portion 9b. The surface 4a side of the second end portion 4c of the second building panel 4 is chamfered.

[0034] The sealing and filling process involves filling the area enclosed by the extension 5d of the area forming tool 5, the bottom surface 4e of the second building panel 4, and the first end portion 3c of the first building panel 3 with sealing material 6.

[0035] With the above configuration, the corner structure 1 and its construction method according to the above embodiment have the following functions and effects.

[0036] As shown in Figure 2, the corner structure 1 is constructed by bringing the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4 close together. A recess 4d is formed along the second end 4c on the back surface 4b of the second building panel 4, which is opposite the first end 3c of the first building panel 3. The corner structure 1 further includes a region forming tool 5. The region forming tool 5 has an extension portion 5d that extends from the back surface 3b side of the first building panel 3 into the recess 4d. The region forming tool 5 forms a region that can be filled with sealant, surrounded by the extension portion 5d and the bottom surface 4e and first end 3c, which are located within the recess 4d and facing the first end 3c. The region forming tool 5 is fixed to the first building panel 3.

[0037] Therefore, the extension 5d of the area forming device 5 is positioned between the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4. Moreover, by utilizing the extension 5d, a sealable area is formed between the first end 3c and the second end 4c. As a result, direct contact between the building panels is suppressed, and damage to the building panels can be prevented. Furthermore, the area forming device 5 is fixed to the first building panel 3. Therefore, even if the second building panel 4 is thick or has a structure that makes it difficult to fix parts, the area forming device 5 can be fixed. And because it is fixed to only one side of the pair of building panels, the installation time is also reduced. Furthermore, the area forming device 5 can have a simpler structure or be made smaller compared to conventional L-shaped joiners. And the area forming device 5 can make the sealable area a desired size or shape. As a result, the amount of sealant 6 (sealant) to be filled can be reduced, or the sealing time can be shortened.

[0038] In the corner structure 1, the width of the bottom surface 4e of the recess 4d of the second building panel 4 in the thickness direction of the first building panel 3 is wider than the thickness of the first end portion 3c of the first building panel 3. Therefore, the first end portion 3c can be reliably positioned to face the recess 4d. Furthermore, the extended portion 5d of the region forming tool 5 extending from the first end portion 3c can be reliably inserted into the recess 4d. Thus, the corner structure 1 can be easily constructed.

[0039] As shown in Figures 2 and 3, the extension portion 5d of the region forming tool 5 has a first surface 5e, a second surface 5f, and a third surface 5h. The first surface 5e extends from the back surface 3b of the first building panel 3 to the front surface 3a of the first building panel 3 along the first end portion 3c. The second surface 5f extends from the first surface 5e toward the bottom surface 4e. The third surface 5h extends from the second surface 5f toward the bottom surface 4e and opposite the first surface 5e. Therefore, the third surface 5h extends toward the opposite side of the sealing filling area. Moreover, the third surface 5h is along the bottom surface 4e of the recess 4d and is in contact with or close to the bottom surface 4e. As a result, when the sealing material 6 is filled into the sealing filling area, the third surface 5h extending from the second surface 5f can prevent the sealing material 6 from going beyond the tip of the second surface 5f and into the back. Furthermore, the region forming tool 5 has a simple structure with a first surface 5e, a second surface 5f, and a third surface 5h. Therefore, conventional products can be reused; for example, construction members called single hat joiners can be reused.

[0040] As shown in Figure 2, the recess 4d has an upright surface 4f that rises from the bottom surface 4e toward the first end 3c. Therefore, the recess 4d is designed to be easily processed. Alternatively, the recess 4d can be easily formed without the use of special cutting tools.

[0041] The area forming tool 5 is designed such that the tip of the third surface 5h comes into contact with the upright surface 4f when filling with the sealant 6. Therefore, when filling with the sealant 6, the extension portion 5d of the area forming tool 5 elastically deforms, which can suppress the expansion of the sealant filling area. As a result, it is possible to suppress the amount of sealant 6 that needs to be filled. Alternatively, the deformation of the extension portion 5d can prevent the sealant 6 from leaking into the interior.

[0042] The length of the second surface 5f in the thickness direction of the second building panel 4 is shorter than the thickness of at least one of the first building panel 3 and the second building panel 4. Therefore, the width of the sealant 6, which depends on the length of the second surface 5f, becomes smaller. As a result, the original surface area of ​​the exterior wall is increased, and superior design quality is achieved. Furthermore, because the second surface 5f is short, the sealing area is smaller, and the amount of sealant required is reduced.

[0043] The second surface 5f is covered with a coating that is non-adherent to the sealant 6. Therefore, the sealant 6 does not adhere to the second surface 5f. On the other hand, one end of the sealant 6 facing the second surface 5f adheres to the second building panel 4, which is the bottom surface 4e of the recess 4d. The other end of the sealant 6 adheres to the first end 3c of the first building panel 3. Therefore, when a tensile or compressive force is applied between the first building panel 3 and the second building panel 4, the sealant 6 can deform without being hindered by the second surface 5f. This prevents the sealant from breaking due to localized force on the sealant 6.

[0044] The area-forming device 5 has a fixing portion 5a that abuts against the back surface 3b of the first building panel 3 and is fixed to the first building panel 3. Therefore, the area-forming device 5 can be easily fixed to the first building panel 3 with a simple structure.

[0045] The construction method for the corner structure comprises a building panel placement process, a region forming tool fixing process, and a sealing filling process. The corner structure 1 is constructed by bringing the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4 close together. In the building panel placement process, the first building panel 3 is positioned so that its first end 3c faces the recess 4d formed in the second end 4c of the second building panel 4. In the region forming tool fixing process, a region forming tool 5, which has an extension 5d inserted into the recess 4d, is fixed to the first building panel 3 before the building panel placement process. In the sealing filling process, sealing material 6 is filled into the region surrounded by the extension 5d of the region forming tool 5, the bottom surface 4e located in the recess 4d and facing the first end 3c, and the first end 3c of the first building panel 3.

[0046] Therefore, the extension 5d of the area forming device 5 is positioned between the first end 3c of the first building panel 3 and the second end 4c of the second building panel 4. Moreover, by utilizing the extension 5d, a sealable area is formed between the first end 3c and the second end 4c. As a result, direct contact between the building panels is suppressed, and damage to the building panels can be prevented. Furthermore, the area forming device 5 is fixed to the first building panel 3. Therefore, even if the second building panel 4 is thick or has a structure that makes it difficult to fix parts, the area forming device 5 can be fixed. And because it is fixed to only one side of the pair of building panels, the installation time is also reduced. Furthermore, the area forming device 5 can have a simpler structure or be made smaller compared to conventional L-shaped joiners. And the area forming device 5 can make the sealable area a desired size or shape. As a result, the amount of sealant 6 to be filled can be reduced, or the sealing time can be shortened.

[0047] The corner structure 1 may use a region-forming tool 20 made of a flat steel plate instead of the region-forming tool 5 described above, as shown in Figure 6. The region-forming tool 20 comprises a fixing part 20a and an extension part 20d. The fixing part 20a abuts against the back surface 3b of the first building panel 3 and is fixed to the first building panel 3 by screws 21. The extension part 20d extends from the back surface 3b side of the first building panel 3 into the recess 4d of the second building panel 4 along the upright surface 4f. The region-forming tool 20 forms a region that can be filled with sealant, surrounded by the extension part 20d, the bottom surface 4e of the recess 4d, and the first end part 3c. The region-forming tool 20 may also be configured such that the extension part 20d is covered with a coating that is non-adhesive to the sealant 6.

[0048] The corner structure 1 may use the area forming tool 23 shown in Figure 7 instead of the area forming tool 5 described above. The area forming tool 23 comprises a fixing part 23a and an extension part 23d. The fixing part 23a abuts against the back surface 3b of the first building panel 3 and is fixed to the first building panel 3. The extension part 23d has a fourth surface 23f that extends from the fixing part 23a toward the bottom surface 4e of the second building panel 4, and a tip part 23h that is bent in a substantially U-shape toward the upright surface 4f of the second building panel 4 from the fourth surface 23f. The tip part 23h abuts against the upright surface 4f. The area forming tool 23 forms a sealable area surrounded by the extension part 23d, the bottom surface 4e of the recess 4d, and the first end part 3c. The area forming tool 23 may also be configured such that the fourth surface 23f is covered with a coating that is non-adhesive to the sealant 6.

[0049] The corner structure 1 may use the area forming tool 24 shown in Figure 8 instead of the area forming tool 5 described above. The area forming tool 24 comprises a fixing part 24a and an extension part 24d. The fixing part 24a abuts against the back surface 3b of the first building panel 3 and is fixed to the first building panel 3. The extension part 24d has a fifth surface 24e that extends from the back surface 3b side of the first building panel 3 to the front surface 3a side of the first building panel 3 along the first end part 3c, and a sixth surface 24f that extends from the fifth surface 24e to the bottom surface 4e side of the recess 4d. The area forming tool 24 forms a sealable area surrounded by the extension part 24d, the bottom surface 4e of the recess 4d, and the first end part 3c. The area forming tool 24 may also be configured such that the sixth surface 24f is covered with a coating that is non-adhesive to the sealant 6.

[0050] The corner structure 1 may use the area forming tool 25 shown in Figure 9 instead of the area forming tool 5 described above. The area forming tool 25 comprises a fixing part 25a and an extension part 25d. The fixing part 25a abuts against the back surface 3b of the first building panel 3 and is fixed to the first building panel 3. The extension part 25d has a seventh surface 25f extending from the fixing part 25a toward the bottom surface 4e of the second building panel 4, and an eighth surface 25h extending from the seventh surface 25f toward the upright surface 4f of the second building panel 4 along the bottom surface 4e. The area forming tool 25 forms a sealable area surrounded by the extension part 25d, the bottom surface 4e of the recess 4d, and the first end part 3c. The area forming tool 25 may also be configured such that the seventh surface 25f is covered with a coating that is non-adhesive to the sealant 6.

[0051] This disclosure is not limited to the appearance and configuration described in the embodiments described above, and various modifications, additions, and deletions are possible without altering the essence of the document.

[0052] For example, the corner structure 1 may also be configured by swapping the arrangement of the first building panel 3 and the second building panel 4.

[0053] For example, the region forming tool 5 may have a second surface that extends from the tip of the first surface, or a second surface that extends from the middle of the first surface.

[0054] For example, the recess 4d in the second building panel 4 is configured such that the width of the bottom surface 4e in the thickness direction of the first building panel 3 is appropriately changed according to the shape of the extension of the area forming tool. That is, the width of the bottom surface 4e may be approximately the same as the thickness of the first end 3c of the first building panel 3, or it may be narrower than the first end 3c.

[0055] For example, the shape of the extension portion of the region-forming tool may be changed as appropriate. Also, the recess of the second building plate 4 may be formed in a different shape depending on the shape of the extension portion of the region-forming tool.

[0056] In the above embodiment, the first building panel 3 and the second building panel 4 each have upper and lower joints at their upper and lower ends. However, the invention is not limited to this, and building panels without joints at their upper and lower ends can also be applied. [Explanation of Symbols]

[0057] 1 Corner structure 3 1st Building Board 3a surface 3b back side 3c 1st end 4 2nd building board 4a surface 4b Reverse side 4c 2nd end 4d recess 4e Bottom 4f standing surface 5 Area forming tool 5a Fixed part 5d extension 5e 1st page 5f 2nd side 5h 3rd page 6. Sealant (Sealing) 7. Building Structure 8 screws 9 Fasteners 10 screws 12 Exterior material 13. Inner material 20 Area shaper 23 Area forming tool 24 Area shaper 25 Area shaper

Claims

1. An external corner structure formed by bringing the first end of the first building panel and the second end of the second building panel close together, On the back surface of the second building panel facing the first end of the first building panel, a recess is formed along the second end, The first building panel has an extension portion that extends from the back side into the recess, and the region forming tool has an extension portion that extends into the recess, and the region forming tool that forms a sealing-fillable region surrounded by the extension portion, the bottom surface facing the first end and the first end, located within the recess, The area forming device is a corner structure fixed to the first building panel.

2. The corner structure according to claim 1, wherein the width of the bottom surface of the recess in the thickness direction of the first building board is wider than the thickness of the first end of the first building board.

3. The corner structure according to claim 1 or 2, wherein the extension portion of the area forming device has a first surface extending from the back side of the first building board to the front side of the first building board along the first end, a second surface extending from the first surface toward the bottom surface, and a third surface extending from the second surface toward the bottom surface and facing the first surface.

4. The corner structure according to claim 3, wherein the recess has an upright surface that rises from the bottom surface toward the first end.

5. The corner structure according to claim 4, wherein the area forming tool is such that the tip of the third surface comes into contact with the upright surface when the sealant is filled in.

6. The corner structure according to claim 3, wherein the length of the second surface in the thickness direction of the second building panel is shorter than the thickness of at least one of the first building panel and the second building panel.

7. The corner structure according to claim 3, wherein the second surface is covered with a coating film that is non-adherent to the sealant.

8. The corner structure according to claim 1 or 2, wherein the area forming tool has a fixing portion that abuts against the back surface of the first building board and is fixed to the first building board.

9. A construction method for an external corner structure, which is formed by bringing the first end of a first building panel and the second end of a second building panel close together, A building board placement step, in which the first building board is positioned such that the first end of the first building board faces the recess formed at the second end of the second building board, A region-forming tool having an extension portion inserted into the recess is fixed to the first building board before the building board placement step, a region-forming tool fixing step, A method for constructing an external corner structure, comprising a sealing filling step of filling the area enclosed by the extension portion of the area forming tool, the bottom surface located in the recess and facing the first end, and the first end of the first building panel with sealant.

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