Fire-resistant partition wall

Abstract

To provide a fireproof partition wall suppressing hot air leakage from horizontal joints, having excellent fireproof performance and workability.SOLUTION: A fireproof partition wall 100 of both surfaces with a single face, having multiple studs 10 and a pair of a first wall 30A and a second wall 30B sandwiching the multiple studs 10, with multiple face bars 20 formed by being arranged vertically and horizontally. The first wall 30A and the second wall 30B have vertical joints 60 and horizontal joints 70. The studs 10 are present on a rear face of the vertical joint 60, and a joint substrate 40 with a T-shaped side section, having a rear face piece 41 and an overhanging piece 42 extended in the thickness direction of a gypsum board 20 and having flame-resistant performance, is arranged to the horizontal joints 70. All of the face bars 20 are fastened to the studs 10 with first fastening members 50, and at least one of butt ends 21, 22 of the two vertically adjacent face bars 20 is fastened to the overhanging piece 42 with second fixing members 55.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a fire-resistant partition wall.

Background Art

[0002] There is known a fire-resistant partition wall with a fire resistance time of 1 hour, which has the performance that when heat due to a fire is applied to a heating surface for 1 hour, the temperature of the non-heating surface does not rise until it reaches a temperature at which combustibles in contact with the non-heating surface may catch fire. Such a conventional fire-resistant partition wall having a fire resistance performance of 1 hour is formed by sandwiching studs formed by a plurality of lightweight steel frames or the like arranged at predetermined intervals, and two walls are screwed to the studs.

[0003] Both of the above two walls have a multi-layer structure of at least two layers of a bottom sheet and a top sheet (both are fire-resistant coating materials), such as a bottom reinforced gypsum board and a top reinforced gypsum board. Therefore, as a whole fire-resistant partition wall, it has a structure with four or more layers of facing materials. Incidentally, in both of the two walls on both sides of the stud, horizontal joints and vertical joints are formed by arranging a plurality of facing materials (bottom facing materials and top facing materials) vertically and horizontally. However, when a fire breaks out indoors, due to the heat exposure and the shrinkage of each facing material, gaps will occur in the joints that were formed by the facing materials being pressed against each other without gaps. Therefore, since hot air will leak out from the joint gaps when there is only one layer of facing material, it is common to use a fire-resistant partition wall with two layers on both sides (a total of four layers with two layers on one side), and by shifting the joint positions of the bottom and top sheets of the two walls, prevent hot air from leaking out from the joint gaps.

[0004] Here, when considering a fire-resistant partition wall with one layer on both sides (one layer on one side, a total of two layers) to improve workability, it is common that there are studs behind the vertical joints of the facing materials (so that each facing material is arranged). Therefore, when a fire breaks out indoors, there is no risk of hot air leaking out from the vertical joints.

[0005] In contrast, since there are no studs on the back of almost the entire area of ​​the horizontal joint, there is a risk that hot air may leak into the interior of the partition wall through the horizontal joint. This leakage of hot air from the horizontal joint can reduce the fire resistance performance of the fire-resistant partition wall. Furthermore, when a fire-resistant partition wall with a fire resistance time of 1 hour is developed, a 1-hour fire resistance test is usually conducted by heating for 1 hour, and the wall can be distributed to the market only after passing this fire resistance test. However, if hot air leaks from the horizontal joint, it becomes difficult to pass this 1-hour fire resistance test.

[0006] Here, Patent Document 1 proposes a partition wall structure that improves fire resistance and facilitates construction work. Specifically, it is a fire-resistant partition wall structure comprising studs and a pair of partition walls having fire resistance performance including an underlayment and a painted overlayment, wherein at least one of the partition walls is provided with an additional reinforcement on the outside.

[0007] However, even in the partition wall structure described in Patent Document 1, each of the pair of walls flanking the studs (here, one wall is considered a partition wall) has two layers of fire-resistant covering material, such as an underlayment and a painted overlayment. Furthermore, one of the partition walls is equipped with an additional covering material, resulting in a total of five layers of fire-resistant covering material for the entire partition wall structure. This presents the challenge of requiring considerable construction time. In addition, as mentioned above, Patent Document 1 does not contain any specific description of joint underlayment material to be installed at locations corresponding to horizontal joints. Therefore, it is assumed that at least two or more layers of fire-resistant covering material are applied to one side of the partition wall to suppress the leakage of hot air into the interior of the partition wall through the horizontal joints.

[0008] Therefore, Patent Document 2 proposes a partition wall that uses as few fire-resistant coating materials as possible as a component to improve workability and has excellent fire resistance by suppressing hot air leakage from horizontal joints. Specifically, it has a plurality of studs arranged at predetermined intervals and a pair of walls sandwiching the plurality of studs, a first wall and a second wall formed by arranging a plurality of gypsum boards vertically and horizontally, both of which are single-layer walls made of a plurality of gypsum boards, and the first wall and the second wall have vertical and horizontal joints formed in them respectively, with studs on the back of the vertical joints, and the horizontal joints are provided with a joint base material having fire-shielding properties, which has a T-shaped cross-section perpendicular to its longitudinal direction and has a back piece that contacts the back of the gypsum board and an overhanging piece that extends from the back piece in the thickness direction of the gypsum board, and the gypsum board, joint base material and studs are not fastened with common screws, but rather have two types of screw fastening methods. In this partition wall, one screw fastening configuration involves the gypsum board being screwed only to the studs and not to the joint batten, with the joint batten being sandwiched between the gypsum board and the studs and fixed at the horizontal joint position. On the other hand, another screw fastening configuration involves the gypsum board being screwed to the studs and also to the joint batten with separate screws, with the joint batten being sandwiched between the gypsum board and the studs and fixed at the horizontal joint position. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2009-191494 [Patent Document 2] International Publication No. 2020 / 070938 [Overview of the project] [Problems that the invention aims to solve]

[0010] According to the partition wall described in Patent Document 2, the amount of facing material can be kept to a minimum to improve workability, and the leakage of hot air from horizontal joints can be suppressed to improve fire resistance. However, the partition wall described in Patent Document 2 has two types of screw fastening methods as described above. In the former method, in which the joint batten material is not fastened to the gypsum board at all, there is a concern that workability will decrease when constructing the partition wall with the joint batten material sandwiched between the studs and the gypsum board. On the other hand, in the latter method, in which the joint batten material is screwed to the gypsum board at a position away from the intersection of the gypsum board, studs and joint batten material, the two upper and lower back pieces of the joint batten material are screwed to the upper and lower gypsum boards, resulting in many screw fastening points, which raises concerns about an increase in the number of parts and a decrease in workability.

[0011] This disclosure provides a fire-resistant partition wall that suppresses hot air leakage from horizontal joints, offers excellent fire resistance, and has excellent workability. [Means for solving the problem]

[0012] A fire-resistant partition wall according to one aspect of this disclosure is Multiple studs arranged at predetermined intervals, A pair of walls sandwiching a plurality of the aforementioned studs, comprising a first wall and a second wall having vertical and horizontal joints, formed by a surface material consisting of a plurality of gypsum boards adjacent to each other in the horizontal and vertical directions, respectively, a fire-resistant partition wall made of a single sheet on both sides, The stud is located on the back of the vertical joint. In the aforementioned horizontal joint, a joint base material is provided which has a T-shaped cross-section perpendicular to its longitudinal direction, a back piece that contacts the back surface of the surface material, and an overhanging piece that extends from the back piece in the thickness direction of the surface material, and which has flame-retardant properties. All of the aforementioned surface materials are fastened to the studs by first fixing members. At least one end of two adjacent surface materials in the vertical direction is fastened to the protruding piece by a second fixing member. [Effects of the Invention]

[0013] According to the present disclosure, it is possible to provide a fire-resistant partition wall that suppresses hot air leakage from horizontal joints, has excellent fire resistance, and excellent workability.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view showing an example of a fire-resistant partition wall according to an embodiment, and a view showing a part broken away. [Figure 2] It is a sectional view taken along the arrow II-II in FIG. 1, and a cross-sectional view showing a cross-section where the facing material and the stud are fastened by a first fixing member. [Figure 3] It is a perspective view of the joint base material. [Figure 4] In the first wall, it is a perspective view showing a state where the joint base material is disposed on the back side of the horizontal joint, and a view showing a state where the facing material, the joint base material, and the stud are not fastened by a fixing member at the three-way intersection position. [Figure 5] It is a longitudinal sectional view showing a cross-section where the facing material and the stud are fastened by a first fixing member in the fire-resistant partition wall according to the embodiment. [Figure 6] It is a perspective view showing an example of the overhanging piece of the joint base material and a second fixing member. [Figure 7A] It is a perspective view showing another example of the overhanging piece of the joint base material. [Figure 7B] It is a perspective view showing a state where a part of another example of the overhanging piece of the joint base material shown in FIG. 7A forms a second fixing member. [Figure 8A] It is a perspective view showing still another example of the overhanging piece of the joint base material. [Figure 8B] It is a perspective view showing a state where a part of still another example of the overhanging piece of the joint base material shown in FIG. 8A forms a second fixing member. [Figure 9A] It is a perspective view showing still another example of the overhanging piece of the joint base material. [Figure 9B] It is a perspective view showing a state where a part of still another example of the overhanging piece of the joint base material shown in FIG. 9A forms a second fixing member. [Figure 10]It is a perspective view showing another example of the overhanging piece of the floor base material and the second fixing member.

Embodiments for Carrying out the Invention

[0015] Hereinafter, a fireproof partition wall according to an embodiment will be described with reference to the accompanying drawings. In the present specification and drawings, for substantially the same components, the same reference numerals may be used to omit redundant descriptions.

[0016] [Fireproof Partition Wall According to Embodiment] Referring to FIGS. 1 to 10, an example of a fireproof partition wall according to an embodiment will be described. Hereinafter, a fireproof partition wall to which a reinforced gypsum board is applied as a gypsum board forming a facing material will be described. However, a gypsum board other than the reinforced gypsum board may be applied to the fireproof partition wall according to the embodiment. Here, FIG. 1 is a perspective view showing an example of a fireproof partition wall according to an embodiment, and is a view showing a part broken away. Further, FIG. 2 is a cross-sectional view taken along the arrow II-II of FIG. and shows a cross-section in which the facing material and the stud are fastened by the first fixing member. FIG. 3 is a perspective view of the floor base material. Further, FIG. 4 is a perspective view showing a state in which the floor base material is disposed on the back side of the horizontal joint in the first wall, and shows a state in which the facing material, the floor base material, and the stud are not fastened by the fixing member at the three-way intersection position. Furthermore, FIG. 5 is a longitudinal sectional view showing a cross-section in which the facing material and the stud are fastened by the first fixing member in the fireproof partition wall according to the embodiment.

[0017] The fireproof partition wall 100 shown in FIG. 1 is applicable to a steel-frame building, an RC (Reinforced Concrete) building, a wooden building, etc., and is applicable to a general single-family house, an apartment house, a factory, a warehouse, etc.

[0018] The fire-resistant partition wall 100 is a double-sided, single-layer fire-resistant partition wall having a plurality of studs 10 arranged at predetermined intervals u, and a pair of first walls 30A and second walls 30B flanking the plurality of studs 10. Here, the interval u at which the studs 10 are arranged may be constant or may change along the way, and for example, the interval u can be set to 303 mm.

[0019] Multiple studs 10 are fitted into grooves in the upper runner 15 and lower runner 16, thereby forming a frame structure consisting of the studs 10, the upper runner 15, and the lower runner 16. In the illustrated example, the studs 10 are made of channel steel with lips, and the upper runner 15 and lower runner 16 are made of channel steel. The studs 10 may also be made of square steel pipes in addition to channel steel. Examples of channel steel or square steel pipes applicable to the studs 10 include those with dimensions of width × height × plate thickness of 45 × 45 × 0.4 mm or larger, as specified in JIS A 6517. Examples of channel steel applicable to the upper and lower runners 15 and 16 include those with dimensions of 45 × 30 to 40 × 0.4 mm or larger.

[0020] Both the first wall 30A and the second wall 30B are formed by arranging multiple reinforced gypsum boards 20 (an example of a facing material) with a thickness s of 25 mm on the top, bottom, left, and right sides. That is, by using multiple reinforced gypsum boards 20 with a thickness of 25 mm, both the first wall 30A and the second wall 30B can be formed with a single layer of fire-resistant covering material, and therefore the fire-resistant partition wall 100 as a whole is formed with two layers of reinforced gypsum boards 20, resulting in a fire-resistant partition wall with one sheet on both sides. Here, the fire-resistant partition wall 100 shown in Figure 1 shows a configuration in which multiple rectangular reinforced gypsum boards 20 are arranged vertically to form the first wall 30A and the second wall 30B, but it may also be a configuration in which multiple reinforced gypsum boards 20 are arranged horizontally to form the first wall 30A and the second wall 30B.

[0021] Reinforced gypsum board 20 is formed by mixing inorganic fiber material into the core of gypsum board, and is a board with higher fire resistance than ordinary gypsum board. According to JIS A 6901, the specifications for reinforced gypsum board 20 specify thicknesses of 12.5, 15.0, 16.0, 18.0, 21.0, and 25.0 mm (thickness tolerance 0 to +0.5 mm).

[0022] Since the fire-resistant partition wall 100 consists of a first wall 30A and a second wall 30B, both of which are formed from a single layer of reinforced gypsum board 20, it is preferable to use reinforced gypsum board 20 with a maximum thickness of 25 mm.

[0023] For this reinforced gypsum board 20, "Tiger Board (registered trademark) Type Z, 25mm thick" manufactured by Yoshino Gypsum Co., Ltd. can be used. Tiger Board Type Z (25mm thick) has planar dimensions of 606mm in width and 1820mm in length and has beveled edges.

[0024] Thus, since the fire-resistant partition wall 100 is a fire-resistant partition wall with only two layers of reinforced gypsum board 20 on both sides, the workability is significantly improved compared to a fire-resistant partition wall with four or more layers of fire-resistant covering material on both sides.

[0025] In the fire-resistant partition wall 100, reinforced gypsum board 20 is applied, which has a width spanning the distance between the centers of three studs 10 (the distance between the centers of the left and right studs 10) that are arranged at a predetermined interval u (for example, 303 mm).

[0026] Furthermore, the arrangement of reinforced gypsum boards 20 on the top, bottom, left, and right sides creates multiple vertical joints 60 and horizontal joints 70. Steel studs 10 are present on the back of the vertical joints 60. Therefore, for example, if a fire occurs on the side of the first wall 30A, there is no risk of hot air leaking into the inside of the fire-resistant partition wall 100 through the vertical joints 60 of the first wall 30A. In the illustrated example, steel members are shown as base materials such as studs, but wooden members may also be used as long as they meet the fire resistance requirements.

[0027] On the other hand, on the back side of the horizontal joint 70, except for the positions corresponding to the studs 10, the back side may be hollow, so there is a possibility that hot air may leak into the inside of the fire-resistant partition wall 100 through the horizontal joint 70. Therefore, a joint base material 40 with fire-resistant properties is provided on the back side of the horizontal joint 70.

[0028] Here, "flame-blocking performance" refers to the ability to block the leakage of hot air and flames. This includes materials that inherently possess fire-resistant properties, materials that harden with heat to become fire-resistant, and materials that, even if they burn due to heat, remain as ash-like masses, thereby achieving flame-blocking performance as a result.

[0029] Materials that exhibit flame-retardant properties include metals, thermosetting resins, and wood. Examples of metals include steel, aluminum, and stainless steel (SUS). Examples of thermosetting resins include phenolic resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (UF), unsaturated polyester resin (UP), alkyd resin, polyurethane resin (PUR), and polyimide resin (PI). Examples of wood include cedar, pine, spruce, rosewood, oak, and beech, and can be either solid wood or laminated wood. When wood burns, it turns to ash and remains as a mass, thus exhibiting flame-retardant properties.

[0030] The fire-resistant partition wall 100 has fire resistance performance for a fire resistance time of 1 hour. A fire-resistant partition wall with a fire resistance time of 1 hour is a partition wall that has passed a 1-hour fire resistance test by heating for 1 hour. In this fire resistance test, the temperature of the unheated surface is set to the temperature at which flammable materials in contact with that surface may burn, and it is required that the temperature not rise above this reference temperature.

[0031] More specifically, heating must not cause damage that could result in flames (including hot air) on the unheated surface, heating must not cause damage that impairs structural integrity, and heating must not cause significant smoke on the unheated surface. Furthermore, the temperature on the unheated surface must not exceed an average temperature of the initial temperature + 140°C, and the maximum temperature must not exceed an initial temperature + 180°C.

[0032] As shown in Figure 1, the joint base material 40 has a T-shaped cross-section, and at the location of the stud 10, as shown in Figure 5, the reinforced gypsum board 20 and the stud 10 are fastened together with screws 50 (an example of a first fixing member). Applicable screws include those with a diameter of 3.5 mm or more and a length of 35 mm or more, and the upper and lower screws 50 can be fastened together with a distance of 200 mm or less between them. On the other hand, as shown in Figure 4, at the intersection of the three components of the reinforced gypsum board 20, joint base material 40, and stud 10, they are not fastened together with screws 50, and the reinforced gypsum board 20 is fastened to the stud 10 with screws 50 at a location outside the intersection of the three components. In other words, as shown in Figure 4, the reinforced gypsum board 20 and the studs 10 are fastened with screws 50 in such a manner that there are no screws 50 in the area enclosed by the joint base material area and the stud area, and at the three intersection points, the joint base material 40 is sandwiched between the reinforced gypsum board 20 and the studs 10 without being fastened with screws 50.

[0033] As shown in Figure 4, since the joint base material 40 is not fastened to the studs 10 with screws 50, in the event of a fire, the deformation due to thermal expansion of the studs 10 and the deformation due to thermal expansion of the joint base material 40 do not interfere with each other. The reinforced gypsum board 20, which is fastened to them with screws, can follow the deformation of both, thereby reducing the stress on the reinforced gypsum board 20 due to the thermal expansion deformation of the steel members acting on it, and as a result, it is possible to suppress cracks that may form in the reinforced gypsum board 20.

[0034] In the fire-resistant partition wall 100, the reinforced gypsum board 20, the joint base material 40, and the studs 10 may be fixed together with a common fixing member. However, in order to improve fire resistance, it is preferable that the reinforced gypsum board 20 and the joint base material 40 are not screwed together at the intersection of the three components, as described above. On the other hand, as will be explained in detail below, in areas outside the intersection of the three components, at least one end 21, 22 of two vertically adjacent reinforced gypsum boards 20 is fastened to the protruding piece 42 of the joint base material 40 by a second fixing member 55 or the like.

[0035] As shown in Figure 3, the joint underlayment 40 is formed by bending a single sheet of material (for example, a metal plate). In the illustrated example, the joint underlayment 40 has protruding pieces 42 extending from two back pieces 41 via two first bent portions 43, and the protruding pieces 42 have a U-shape with a second bent portion 44.

[0036] Furthermore, the joint base material 40 has a predetermined angle θ of less than 90 degrees between the back piece 41 and the overhanging piece 42. Here, this predetermined angle θ of less than 90 degrees can be said to be approximately 60 to 88 degrees.

[0037] Because the back piece 41 and the overhanging piece 42 have a predetermined angle θ of less than 90 degrees, when the joint underlayment 40 is installed by inserting the overhanging piece 42 between the upper end surface 21 (edge) and the lower end surface 22 (edge) of the upper and lower reinforced gypsum boards 20, as shown in Figure 4, for example, the end of the back piece 41 can be tightly attached to the back surface of the reinforced gypsum board 20 without any gaps.

[0038] Then, with the back of the joint base material 40 pressed against the stud 10, the reinforced gypsum board 20 is fixed to the stud 10, thereby ensuring that the joint base material 40 reliably prevents (seals) any gaps in the horizontal joint 70. Consequently, the leakage of hot air into the interior of the fire-resistant partition wall 100 through the horizontal joint 70 is effectively prevented.

[0039] As shown in Figure 3, the joint base material 40 has a total width t1 (width in cross-section) of 40 mm or more between its two back pieces 41. In addition, an overhanging piece 42 is provided at the center of the two back pieces 41, and the overhanging length of the overhanging piece 42 is set in the range of 5 mm to 20 mm. Furthermore, the longitudinal length t3 of the joint base material 40 can be set to a length of approximately 1815 mm, which spans 6 times, for example, when the spacing u between the studs 10 is approximately 303 mm.

[0040] Thus, because the joint underlayment 40 has an overall width of 40 mm or more and a total length of approximately 1815 mm, resulting in a high aspect ratio, it is prone to bending during transportation and construction, and if the joint underlayment 40 is made of metal, there is a risk of plastic deformation. However, since the joint underlayment 40 has a protruding piece 42 along its entire length at the center of its width, this protruding piece 42 provides bending rigidity, making it possible to suppress or prevent bending and plastic deformation during transportation and construction.

[0041] As shown in Figure 5, the reinforced gypsum board 20 has a chamfered portion 24 at the corner on the back side of the lower end surface 22 (edge). The length t4 of this chamfered portion 24 in the thickness direction of the reinforced gypsum board 20 is set in the range of 7 mm to 23 mm.

[0042] Therefore, when joint underlayment 40 is installed on the back of the upper and lower reinforced gypsum boards 20, the overhanging piece 42, which has an overhanging length t2 set in the range of 5 mm to 20 mm, can be accommodated within the chamfered portion 24.

[0043] In this way, as the protruding piece 42 is completely housed in the chamfered portion 24, the lower end surface 22 (edge) of the upper reinforced gypsum board 20 and the upper end surface 21 (edge) of the lower reinforced gypsum board 20 can come into contact without any gaps, as shown in Figure 5, and no gaps will occur in the horizontal joint 70.

[0044] The above explanation pertains to the chamfering process when reinforced gypsum board is installed vertically. In contrast, when reinforced gypsum board is installed horizontally, the edges of the boards, where the sides of the boards are covered with gypsum board paper, are butted together (edge ​​shapes include beveled edges and square edges). However, when the edge bend angle (the angle of the side of the board edge covered with gypsum board paper) is less than 90 degrees, it may be possible to create a gap that accommodates the protruding piece of joint underlayment without chamfering. In this case, care should be taken to prevent the horizontal joint from opening. Even when installing horizontally, chamfering should be done if necessary.

[0045] Next, an example of the protruding piece 42 of the joint-underlayment material 40 and the second fixing member will be described with reference to Figures 6 to 10. Here, Figures 6 to 10 are all perspective views showing an example of the protruding piece of the joint-underlayment material and the second fixing member.

[0046] In the fire-resistant partition wall 100, the reinforced gypsum board 20, the joint base material 40, and the studs 10 may be fixed together with a common fixing member. However, in order to improve fire resistance, it is preferable that, as described above, the reinforced gypsum board 20, the back piece 41 of the joint base material 40, and the studs 10 are not fastened together with a common fixing member (for example, nails or screws, and the same applies below) at the intersection of the three. On the other hand, in areas outside the intersection of the three, at least one end piece 21, 22 of two vertically adjacent reinforced gypsum boards 20 is fastened to the protruding piece 42 of the joint base material 40 with a second fixing member of various forms. Here, "at least one end 21, 22 of two vertically adjacent reinforced gypsum boards 20 is fastened to the overhanging piece 42 of the joint base material 40" includes both a configuration in which the overhanging piece 42 is fastened to only one end of two vertically adjacent reinforced gypsum boards 20 and a configuration in which the overhanging piece 42 is fastened to both ends of two vertically adjacent reinforced gypsum boards 20.

[0047] In the example shown in Figure 6, a plurality of guide holes 45 are provided at predetermined intervals along the longitudinal direction of the protruding piece 42 of the joint base material 40, and screws 55 (an example of a second fixing member) are inserted through each guide hole 45 and driven into the end of the reinforced gypsum board 20 (not shown). Here, the second fixing member 55 may be a nail or screw in addition to a screw.

[0048] The second fixing member 55 in the illustrated example is fastened to one end 21, 22 of two vertically adjacent reinforced gypsum boards 20.

[0049] In actual construction, multiple studs 10 are installed at predetermined intervals u on the upper and lower runners 15 and 16, and then the lower reinforced gypsum board 20 is fastened to the studs 10 with screws 50.

[0050] Next, the lower back piece 41 of the joint filler material 40 is inserted into the back side (stud 10 side) of the upper end surface 21 (edge) of the reinforced gypsum board 20 located below, and the protruding piece 42 is hooked onto the upper end surface 21 (edge) to secure it. Then, the second fixing member 55 is driven into the upper end surface 21 through the guide holes 45 to fix the protruding piece 42 to the upper end surface 21 of the reinforced gypsum board 20.

[0051] Next, the lower end surface 22 (edge) of the upper reinforced gypsum board 20 is placed on the upper end surface 21 (edge) of the lower reinforced gypsum board 20, sandwiching the protruding piece 42, and the upper reinforced gypsum board 20 is fastened to the stud 10 with screws 50.

[0052] In this way, by fastening the protruding piece 42 of the joint base material 40 to the edge 21 of the reinforced gypsum board 20 with the second fixing member 55, and fastening the upper and lower reinforced gypsum boards 20 to the stud 10 with the first fixing member 50, it is possible to prevent the joint base material 40 from falling off or shifting position from the edge of the reinforced gypsum board 20 during installation, thereby improving the workability of the fire-resistant partition wall 100. Furthermore, compared to, for example, fastening both the upper and lower back pieces 41 of the joint base material 40 to the upper and lower reinforced gypsum boards 20 with screws, the number of screws can be significantly reduced, and the number of fastening points can be reduced, thereby lowering construction costs and further improving workability.

[0053] On the other hand, the example shown in Figure 7A is a configuration in which a plurality of bent notches 46 are made at predetermined intervals along the longitudinal direction of the protruding piece 42 of the joint base material 40. In this example, the bent notches 46 are V-shaped.

[0054] As shown in Figure 7B, the bent notch 46 is bent and erected via the third bent portion 46a (an example of a bent portion), so that the erected notch 46 forms the second fixing member.

[0055] In actual construction, the joint base material 40 is transported to the site in an unbent state as shown in Figure 7A, which prevents injuries from the notches 46 during handling. After the joint base material 40 is transported to the site, during installation, workers bend the notches 46 to make them stand upright, and then push them into, for example, the end 21 of the reinforced gypsum board 20 below, so that each notch 46 pierces the end 21 and the joint base material 40 is fastened to the reinforced gypsum board 20 below.

[0056] Here, multiple bent notches 46 may be provided on both the upper and lower surfaces of the overhanging piece 42 of the joint base material 40, and the joint base material 40 may be fixed to both ends 22, 21 of the upper and lower reinforced gypsum boards 20 by the notches 46 on both the upper and lower surfaces.

[0057] By applying the joint base material 40 shown in the illustration, a portion of the protruding piece 42 becomes a second fixing member through bending, thus eliminating the need for a second fixing member made of a separate material such as screws. This further reduces construction costs and improves workability.

[0058] On the other hand, the example shown in Figure 8A is a configuration in which multiple bent notches 46 are made in the protruding piece 42 of the joint base material 40, forming a single notch unit 47 that is continuous in the longitudinal direction of the protruding piece 42, and multiple notch units 47 are opened at predetermined intervals in the longitudinal direction of the protruding piece 42.

[0059] As shown in Figure 8B, in this configuration as well, the notched unit 47 is bent and erected via the third bending portion 47a (an example of a bending portion), so that the erected notched unit 47 forms the second fixing member. In this configuration as well, multiple notched units 47 may be provided on both the upper and lower surfaces of the overhanging piece 42 of the joint base material 40.

[0060] On the other hand, the example shown in Figure 9A is a configuration in which multiple bent notches 48 are adjacent to each other to form a single unit, and multiple units are opened at predetermined intervals in the longitudinal direction of the protruding piece 42. Here, the bent notches 48 in the illustrated example also have a V-shape.

[0061] As shown in Figure 9B, when each notch 48 is folded through a third bending portion 48a (an example of a bending portion), the lines connecting each third bending portion 48a form a closed polygon (a hexagon in the illustrated example). In this configuration as well, multiple units consisting of multiple notches 48 may be provided on both the upper and lower surfaces of the overhanging piece 42 of the joint base material 40.

[0062] Furthermore, the example shown in Figure 10 is a configuration in which second fixing members 49 formed by double-sided tape are provided at predetermined intervals in the longitudinal direction of the protruding piece 42. Here, the double-sided tape may be provided continuously along the longitudinal direction of the protruding piece 42. In addition to double-sided tape, the second fixing member 49 may also be an adhesive. Furthermore, for example, multiple double-sided tapes 49 as shown in the example may be provided on one side of the protruding piece 42 (e.g., the bottom surface), and the other side of the protruding piece 42 (e.g., the top surface) may be provided with curved cuts 46, 48 as shown in Figures 7 to 9, or a series of curved cuts 47, etc.

[0063] The illustrated fire-resistant partition wall 100 is easy to construct because it is formed with as few facing materials 20 as possible. Furthermore, since at least one end 22,21 of two vertically adjacent facing materials 20 is fastened to the protruding piece 42 of the joint base material 40 with a second fixing member, the detachment and displacement of the joint base material 40 are suppressed, further improving constructability. In addition, the joint base material 40 effectively suppresses hot air leakage from the horizontal joints 70 in the fire-resistant partition wall 100, resulting in a fire-resistant partition wall with excellent fire resistance.

[0064] Furthermore, since the joint base material 40 is fastened with a second fixing member to at least one end 22,21 of two vertically adjacent surface materials 20, when the first wall 30A and the second wall 30B of the fire-resistant partition wall 100 deform during an earthquake, the multiple surface materials 20 constituting each wall deform together as a single unit, for example, into a parallelogram, thereby suppressing the occurrence of wrinkles in the wallpaper or other materials (not shown) applied to the interior surface of the first wall 30A and the second wall 30B.

[0065] Furthermore, the fact that the stud 10, the reinforced gypsum board 20, and the back piece 41 of the joint base material 40 are not fixed together with a common fixing member at the intersection of the three, more specifically, that the back piece 41 of the joint base material 40 is held in place by being sandwiched between the stud 10 and the reinforced gypsum board 20 and is not fixed together, reduces the influence of strain stress on the reinforced gypsum board 20 from deformation due to thermal expansion of the stud 10 and deformation due to thermal expansion of the joint base material 40 during a fire. This effectively suppresses cracks that may occur in the reinforced gypsum board 20 during a fire.

[0066] Furthermore, other embodiments may be possible in which other components are combined with the configurations listed in the above embodiments, and this disclosure is not in any way limited to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of this disclosure, and can be appropriately determined according to the application. [Explanation of Symbols]

[0067] 10: Stud 15: Upper runner (runner) 16: Lower runner (runner) 20: Surface materials (reinforced gypsum board, gypsum board) 21: Upper end surface (edge) 22: Lower end surface (edge) 23: Side end surface 24: Chamfered section 30A: 1st wall 30B: 2nd wall 40: Underground framing material 41: Back piece 42: Overhanging piece 43: First folding section 44: Second folding section 45: Guide hole 46: Curved cut (cut) 46a: Third folding section (folding section) 47: Continuous curved cuts (cutting unit) 47a: Third folding section (folding section) 48: Curved cut (cut) 48a: Third folding section (folding section) 49: Double-sided tape 50: Screw (first fixing member) 55: Screw (second fixing member) 60: Vertical joints 70: Horizontal joint 100: Fire-resistant partition wall

Claims

1. Multiple studs arranged at predetermined intervals, A pair of walls sandwiching a plurality of the aforementioned studs, comprising a first wall and a second wall having vertical and horizontal joints, formed by a surface material consisting of a plurality of gypsum boards adjacent to each other in the horizontal and vertical directions, respectively, a fire-resistant partition wall made of a single sheet on both sides, The stud is located on the back of the vertical joint. In the aforementioned horizontal joint, a joint base material is provided which has a T-shaped cross-section perpendicular to its longitudinal direction, a back piece that contacts the back surface of the surface material, and an overhanging piece that extends from the back piece in the thickness direction of the surface material, and which has flame-retardant properties. All of the aforementioned surface materials are fastened to the studs by first fixing members. A fire-resistant partition wall in which at least one end of two vertically adjacent panels is fastened to the protruding piece by a second fixing member.

2. The aforementioned facing material, the aforementioned joint base material, and the aforementioned studs are not fastened together by a common fixing member. The fire-resistant partition wall according to claim 1, wherein the protruding piece is fastened to only one end of two vertically adjacent facing materials.

3. The aforementioned facing material, the aforementioned joint base material, and the aforementioned studs are not fastened together by a common fixing member. The fire-resistant partition wall according to claim 1, wherein the protruding piece is fastened to the ends of both of the two adjacent facing materials in the vertical direction.

4. The fire-resistant partition wall according to any one of claims 1 to 3, wherein the second fixing member is a member driven into the side of the protruding piece toward the end.

5. A fire-resistant partition wall according to any one of claims 1 to 3, wherein a guide hole is provided in the protruding piece and the second fixing member is driven in through the guide hole.

6. The fire-resistant partition wall according to any one of claims 1 to 3, wherein the second fixing member is a member formed by bending a curved notch provided in the protruding piece and then erecting it.

7. The fire-resistant partition wall according to claim 6, wherein a plurality of the aforementioned bent cuts are adjacent to each other, and the lines connecting the respective bent portions form a closed polygon.

8. The fire-resistant partition wall according to claim 6, wherein the plurality of the aforementioned bent notches are continuous in the longitudinal direction of the protruding piece.

9. The fire-resistant partition wall according to any one of claims 1 to 3, wherein the second fixing member is an adhesive or double-sided tape.

10. The fire-resistant partition wall according to any one of claims 1 to 3, wherein the second fixing member is a member driven in from the side of the protruding piece toward the end, and a plurality of types of adhesive or double-sided tape.

11. The fire-resistant partition wall according to any one of claims 1 to 3, wherein the facing material is reinforced gypsum board and has a thickness of 25 mm.

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