Building wall structure and corner fastening members

Abstract

To provide a building wall structure and a corner part fastening member, which can suppress peeling of an interior board at an intersection between a vertical backing material and a horizontal backing material for fixing the interior board in case of fire.SOLUTION: The wall structure is a wall structure of a building, which has a vertical backing material 2 and a horizontal backing material 3 for fixing a gypsum board 1 that is an interior board. The wall structure has a corner part fastening member 6 positioned at a recessed part formed by the vertical backing material 2 and the horizontal backing material 3 on a circumference side of an intersection 20 at which the vertical backing material 2 intersects with the horizontal backing material 3. A board fixing screw 5 for fixing a corner part of the gypsum board 1 is screwed to four board fixing face parts of the corner fastening member 6.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a wall structure and a corner fixing member of a building having fire and heat resistance.

Background Art

[0002] As shown in FIG. 9, in an inner wall structure in which gypsum boards 83 are arranged separately in the vertical direction, in addition to the vertical base material 81, a horizontal base material 82 to which the upper side of the lower gypsum board 83 and the lower side of the upper gypsum board 83 are fixed by screws is also provided. And at the intersection X where the vertical base material 81 and the horizontal base material 82 intersect, the lower right and left corners of the upper two gypsum boards 83 are located, and the upper right and left corners of the lower two gypsum boards 83 are located. By screwing screws 84 screwed into each corner of the gypsum board 83 from the indoor side further into the intersection X, each of the above corners is fixed to the intersection X.

[0003] Note that Patent Document 1 discloses a heat insulation part disposed between an outer wall material and a lattice material, and an attachment part extending outward from this heat insulation part and attached to a pair of steel columns, and a heat insulation material formed so as to be able to pass through a through part between the pair of steel columns, and an attachment means for attaching the attachment part to the pair of steel columns.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, during an indoor fire in a building, the gypsum board 83 shrinks due to the heat of the fire. However, as shown in Figure 10, at the intersection X, the vertical and horizontal gaps at the fastening points of the screws 84 in the gypsum board 83 are small, about 10 mm. As a result, the shrinkage of the gypsum board 83 causes cracks to form around the screws 84, and the corners of the gypsum board 83 begin to peel off and eventually fall off. When a part of the gypsum board 83 falls off in this way, heat can penetrate into that area, which may reduce its fire resistance performance. It should be noted that Patent Document 1 does not show a structure that can solve this problem.

[0006] The objective of this invention is to provide a building wall structure and corner fastening member that can suppress the peeling of interior boards in the event of a fire at the intersection of vertical and horizontal base materials that fix interior boards. [Means for solving the problem]

[0007] The building wall structure of this invention is a building wall structure having vertical base materials and horizontal base materials as base materials for fixing interior boards, characterized in that a corner fixing member is provided at the concave corner around the intersection where the vertical base material and the horizontal base material intersect, with the board fixing surface portion positioned substantially flush with the indoor side surface of the base material, and the corner portion of the interior board is fixed to the board fixing surface portion with screws.

[0008] With the above configuration, the corners of the interior board are screwed to the board fixing surface of the corner fastening member located around the intersection. As a result, the gap at the edge of the interior board at the screw fixing position relative to the corner becomes larger, and even if the interior board shrinks during an indoor fire, cracking of the interior board around the screws can be suppressed. This prevents the corners of the interior board from peeling off and falling off, thus avoiding a decrease in fire resistance performance.

[0009] The corners of the interior board may also be fixed with screws at the intersections mentioned above. This increases the number of screws used to fix the corners of the interior board, thereby enhancing the ability to prevent the corners of the interior board from peeling up.

[0010] In the wall structure of the building described above, the corner fastening member may be attached to the vertical framing member. In this configuration, the corner fastening member may also be equipped with a holding portion for holding the horizontal framing member. With this configuration, the horizontal framing member is indirectly attached to the vertical framing member via the corner fastening member, thus eliminating the need for dedicated hardware or staples to attach the horizontal framing member to the vertical framing member.

[0011] Furthermore, the corner fastening member of this invention is a corner fastening member used in the wall structure of the above-mentioned building, and is characterized by comprising a board fixing surface portion, a mounting surface portion for attaching the corner fastening member to the vertical base material, and a holding portion. By using this corner fastening member, the horizontal base material can be indirectly attached to the vertical base material via the corner fastening member.

[0012] The corner fastening member described above has a central side plate portion and side flat plate portions formed parallel to the central side plate portion on both sides of the central side plate portion via steps, and its vertical cross-section may be substantially hat-shaped. With this configuration, for example, it becomes possible to position the central side plate portion facing the outdoor side surface of the vertical base material and fix the corner fastening member to the vertical base material. [Effects of the Invention]

[0013] This invention has the effect of suppressing the peeling of interior boards during a fire at the intersection of vertical and horizontal base materials that fix the interior boards, thereby preventing a decrease in fire resistance performance. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view of the wall structure of the building of the embodiment as seen from the interior side, and a cross-sectional view taken along the line AA in this front view. [Figure 2] This is an explanatory diagram showing the mutual fastening of vertical and horizontal framing materials using metal fittings, which can be used in the wall structure of the building of the embodiment. [Figure 3] This is an enlarged explanatory diagram of the intersection point where vertical and horizontal framing materials intersect in the wall structure of the building according to the embodiment. [Figure 4] This is an enlarged perspective view showing the intersection points and corner fastening members where vertical and horizontal framing materials intersect in the wall structure of the building according to the embodiment. [Figure 5] Figure 3 is a schematic enlarged view of the cross-section taken along the arrow BB. [Figure 6] Figure 4 is a schematic enlarged view of the cross-section taken along the CC arrow. [Figure 7] This is a diagram showing another embodiment, an enlarged perspective view showing the intersection point where the vertical and horizontal base materials intersect, and the corner fastening member. [Figure 8] This is a perspective view showing another embodiment, specifically the intersection point where the vertical and horizontal base materials intersect, and the corner fastening member. [Figure 9] This is a front view of a conventional building's wall structure as seen from the interior side, and a cross-sectional view taken along the DD arrow in this front view. [Figure 10] This is an enlarged explanatory diagram of intersection point X in Figure 9. [Modes for carrying out the invention]

[0015] Hereinafter, embodiments will be described based on the accompanying drawings. As shown in FIG. 1, the wall structure of this building includes an outer wall portion 101 and an inner wall portion 102. In the inner wall portion 102, the gypsum board 1, which is an interior board, is divided into a lower gypsum board 1 and an upper gypsum board 1 and arranged. In a structure including the gypsum board 1 separated and arranged vertically like this, as a base material, in addition to the vertical base material 2, a horizontal base material 3 to which the upper side portion of the lower gypsum board 1 and the lower side portion of the upper gypsum board 1 are screwed and fixed is also provided. Further, at the location where the column 4 is located, the vertical base material 2 is spaced apart horizontally from the column 4. Also, in addition to the left and right side portions of the gypsum board 1, the central side portion is also screwed and fixed to the vertical base material 2. More specifically, the screwing and fixing of the gypsum board 1 to the vertical base material 2 and the horizontal base material 3 is performed by further screwing a board fixing screw 5 screwed into the gypsum board 1 from the indoor side into the vertical base material 2 and the horizontal base material 3.

[0016] The vertical base material 2 and the horizontal base material 3 are made of wood or lightweight steel frames. In the case of wood, the horizontal base material 3 is fixed to the vertical base material 2 by, for example, a stapler. In the case of lightweight steel frames, for example, as shown in FIG. 2, a fixing fitting 31 can be used. The flat plate portions on both sides of this fixing fitting 31 are screwed and fixed to the side surface of the vertical base material 2. Then, by inserting the central side portion of the fixing fitting 31 into the end opening of the horizontal base material 3, the horizontal base material 3 is indirectly held by the vertical base material 2 through this fixing fitting 31.

[0017] In this way, by supporting the horizontal base material 3 by the vertical base material 2, an intersection portion 20 formed by these vertical base material 2 and horizontal base material 3 is created. This intersection portion 20 is composed of the vertical base material 2.

[0018] However, in the following example, a structural example is shown in which the horizontal base material 3 made of wood or lightweight steel frames is indirectly held by a corner fixing member 6 described later without using the fixing fitting 31 and the stapler. Also, in another example later, a structural example of holding the horizontal base material 3 using the fixing fitting 31 or the stapler is shown.

[0019] As shown in Figure 3, the upper right corner and upper left corner of the two lower gypsum boards 1 are located at the intersection 20, as are the lower right corner and lower left corner of the two upper gypsum boards 1. The corner fastening member 6 is attached to this intersection 20.

[0020] As shown in Figure 4, the corner fastening member 6 is a member that fits into the four concave corners formed by the vertical base material 2 and the horizontal base material 3 around the intersection 20 where the vertical base material 2 and the horizontal base material 3 intersect. It comprises a board fixing surface portion 61 into which the board fixing screws 5 (in Figure 4, the screw positions are shown by dashed lines and the reference numeral 5 is attached to these screw positions) that fix the corner of the gypsum board 1 are screwed, a mounting surface portion 62 for attaching the corner fastening member 6 to the vertical base material 2, and a holding portion 63 for holding the horizontal base material 3. Furthermore, these parts are connected and integrated by a joint surface. This corner fastening member 6 can be manufactured, for example, by press-forming a steel plate.

[0021] The board fixing surface portion 61 is a vertical surface portion located substantially flush with the indoor side surface of the vertical base material 2 at the four concave corners, and faces the right lower corner and left lower corner of the two upper gypsum boards 1, as well as the right upper corner and left upper corner of the two lower gypsum boards 1.

[0022] The mounting surface portion 62 is a vertical surface portion of the vertical base material 2 that faces the outdoor side, and is attached to the vertical base material 2 by a single mounting screw 51 (in Figure 4, the screw position is shown by a dashed line, and this screw position is denoted by the reference numeral 51) that is screwed in from the outdoor side.

[0023] The retaining portion 63 has a horizontal surface extending outward from each board fixing surface portion 61 and contacts the upper and lower surfaces of the horizontal base material 3. A single base fixing screw 52 (in Figure 4, the screw position is shown by a dashed line and the reference numeral 52 is added to this screw position) is screwed into the portion of the retaining portion 63 that contacts the upper surface of each horizontal base material 3 from above, thereby supporting each horizontal base material 3 to the vertical base material 2 via the retaining portion 63. Note that screws 5, 51, and 52 are screwed in without pre-drilling holes.

[0024] Figure 5 is a schematic view of the cross-section as seen by arrow BB in Figure 3. As shown in Figure 5, the corner fastening member 6 has a central side plate portion (mounting surface portion 62) and side flat plate portions (board fixing surface portions 61) formed parallel to the central side plate portion on both sides of the central side plate portion via steps, and has a hat-shaped portion whose cross-section is substantially hat-shaped.

[0025] Similarly, Figure 6 is a schematic diagram of the cross-section as seen by arrow CC in Figure 3. As shown in Figure 6, the corner fastening member 6 has a central side plate portion (a connecting surface that connects the upper and lower holding portions 63 on the outdoor side) and side flat plate portions (board fixing surface portions 61) formed parallel to the central side plate portion on both sides of the central side plate portion via steps, and has a hat-shaped portion whose vertical cross-section is approximately hat-shaped.

[0026] In the wall structure of the above-mentioned building, the corners of the gypsum board 1 are fixed to the board fixing surface 61 of the corner fastening member 6 using the board fixing screws 5, and the corners of the gypsum board 1 are also fixed to the intersection 20 using the board fixing screws 5.

[0027] With the wall structure described above, the corners of the gypsum board 1 are screwed to the board fixing surface 61 of the corner fastening member 6 located around the intersection 20. This allows the gap at the edge of the gypsum board 1 at the screw fixing position relative to the corner to be made larger, for example, about 30 mm in both the vertical and horizontal directions. As a result, even if the gypsum board 1 shrinks during an indoor fire, cracking of the gypsum board 1 around the board fixing screws 5 can be suppressed. This prevents the corners of the gypsum board 1 from peeling off and falling away, thus avoiding a decrease in fire resistance performance.

[0028] Furthermore, as shown in Figures 5 and 6, if board fixing screws 5 that secure the corners of the gypsum board 1 are also screwed into the intersection points 20, the number of board fixing screws 5 that secure the corners of the gypsum board 1 increases, thereby enhancing the ability to suppress the peeling of the corners of the gypsum board 1.

[0029] Furthermore, the corner fastening member 6 is attached to the vertical base material 2 by a single mounting screw 51 that is screwed in from the outdoor side at its mounting surface 62, thus simplifying the installation process. Moreover, with the corner fastening member 6, the horizontal base material 3 is fixed to the vertical base material 2 via the holding part 63 by a single base fixing screw 52 that is screwed in from above into the holding part 63 that contacts the upper surface of the horizontal base material 3. In other words, a structure can be created that does not require the use of the fixing hardware 31.

[0030] Furthermore, in a wall structure equipped with corner fastening members 6, the mounting surface 62 is located on the outdoor side of the vertical base material 2, and the connecting portion is located on the outdoor side of the horizontal base material 3, thereby improving the heat shielding and flame-resistant properties of the base material against flames from the outdoors. In addition, it is possible to make the gypsum board 1 thinner. Moreover, since the corner fastening member 6 has a holding portion 63 for holding the horizontal base material 3, it becomes easier to accurately align the horizontal base material 3 when attaching it to the vertical base material 2 using the holding portion 63.

[0031] Next, we will describe an example of a wall structure that does not use the corner fastening members 6 described above. In this example of a wall structure, as shown in Figure 7, two corner fastening members 6A are used. In this configuration, the horizontal base material 3 is fixed to the vertical base material 2 by the fixing hardware 31 described above.

[0032] The corner fastening member 6A comprises a board fixing surface portion 61 into which board fixing screws 5 that fix the corner of the gypsum board 1 are screwed, and a mounting surface portion 62 for attaching the corner fastening member 6A to the vertical base material 2. The upper corner fastening member 6A is located at the two upper concave corners of the intersection point 20 where the vertical base material 2 and the horizontal base material 3 intersect, and the lower corner fastening member 6A is located at the two lower concave corners of the intersection point 20 where the vertical base material 2 and the horizontal base material 3 intersect.

[0033] These corner fastening members 6A also have a central side plate portion (mounting surface portion 62) and side flat plate portions (board fixing surface portions 61) formed parallel to the central side plate portion on both sides of the central side plate portion with a step in between, and the cross-section is substantially hat-shaped.

[0034] Even in a wall structure using the corner fastening member 6A described above, the gap at the screw fixing point at the corner of the gypsum board 1 can be made larger, for example, to about 30 mm in both the vertical and horizontal directions. Therefore, even if the gypsum board 1 shrinks during a fire, cracking of the gypsum board 1 around the board fixing screws 5 can be suppressed. This prevents the corners of the gypsum board 1 from peeling off and falling off, thus avoiding a decrease in fire resistance performance.

[0035] In the example above, the corner fastening members 6A are arranged so that the two board fixing surfaces 61 are aligned horizontally, but it is also possible to arrange the corner fastening members 6A so that the two board fixing surfaces 61 are aligned vertically. In this configuration, the corner fastening members 6A are fixed to the horizontal base material 3 with screws.

[0036] Furthermore, as a variation of the corner fastening member 6A described above, two corner fastening members 6A can be connected at a mounting surface 62 to form an integrated member. This integrated member may be attached to the vertical base material 2 by a single mounting screw 51 that is screwed into the mounting surface 62 from the outdoor side.

[0037] Next, another example of a wall structure that does not use the corner fastening members 6 and 6A described above will be explained. In this example of a wall structure, for example, a corner fastening member made of a flat steel plate having a rectangular shape larger than the rectangular shape of the intersection 20 is used, and this rectangular corner fastening member is temporarily attached to the indoor side of the intersection 20 with adhesive or the like. Then, when installing the gypsum board 1, board fixing screws 5 are screwed into the gypsum board 1 from the indoor side at the corners of the flat steel plate which is the corner fastening member located at the intersection 20 of the vertical base material 2 and around it. In this structure, the four corners of the flat steel plate which is the corner fastening member become the board fixing surface portion that fixes the corner of the gypsum board 1, and the central part of the flat steel plate becomes the mounting surface portion that attaches the corner fastening member to the vertical base material 2.

[0038] Alternatively, a steel angle can be used as a corner fastening member. For example, one side of the steel angle can be screwed to the vertical base material 2 or horizontal base material 3 that forms the concave corner around the intersection 20, with the other side serving as the board fixing surface.

[0039] Next, another example of a wall structure that does not use the corner fastening members 6 and 6A described above will be explained. In this example of a wall structure, as shown in Figure 8, a corner fastening member 6B is used. The corner fastening member 6B corresponds to a member in which board fixing surface portions 61 are bent and formed on the flat plate portions on both sides of the fixing hardware 31 described above. It comprises the board fixing surface portion 61, a mounting surface portion 62 for attaching the corner fastening member 6B to the vertical base material 2, and a holding portion 63 for holding the horizontal base material 3.

[0040] Such a corner fastening member 6B has a central side plate portion (holding portion 63) and side flat plate portions (mounting surface portions 62) formed parallel to the central side plate portion on both sides of the central side plate portion via a step, and its vertical cross-section is substantially hat-shaped. The board fixing surface portion 61 extends from the indoor edge of the side flat plate portion (mounting surface portion 62) and is positioned substantially flush with the indoor surface of the vertical base material 2.

[0041] Even in a wall structure using the corner fastening member 6B described above, the gap at the screw fixing point at the corner of the gypsum board 1 can be made larger, for example, to about 30 mm in both the vertical and horizontal directions. Therefore, even if the gypsum board 1 shrinks during a fire, cracking of the gypsum board 1 around the board fixing screws 5 can be suppressed. This prevents the corners of the gypsum board 1 from peeling off and falling away, thus avoiding a decrease in fire resistance performance.

[0042] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of Symbols]

[0043] 1: Gypsum board (interior board) 2: Vertical underlayment 3: Horizontal underlayment 4: Pillar 5: Board fixing screws 6: Corner fastening member 6A: Corner fastening member 6B: Corner fastening member 20: Intersection 31: Fixing hardware 51: Mounting screws 52: Screws for fixing the base 61: Board fixing surface 62: Mounting surface 63: Holding part 101: Exterior wall 102: Interior wall section

Claims

1. A building wall structure having vertical and horizontal base materials as base materials for fixing interior boards, wherein a corner fixing member is provided at the concave corner around the intersection of the vertical and horizontal base materials, with the board fixing surface portion positioned substantially flush with the indoor side surface of the base material, and the corner portion of the interior board is pressed against the board fixing surface portion and fixed to the board fixing surface portion by screws.

2. A building wall structure according to claim 1, characterized in that the corners of the interior boards are also fixed by screws at the intersections.

3. A building wall structure according to claim 1 or claim 2, characterized in that the corner fastening member is attached to the vertical base material.

4. The building wall structure according to claim 3, wherein the corner fastening member is provided with a holding portion for holding the horizontal base material.

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