handrail wall

Abstract

To provide a handrail wall which can contribute to realization of a decarbonized society by promoting carbon neutrality and target achievement of SDGs, and which can alleviate trouble and cost while suppressing an impact on the degree of design freedom of a staircase.SOLUTION: A handrail wall 10 of a staircase 1 includes a wall panel 2, and a wooden framework structure body 11 provided on the wall panel 2, and an upper surface is an inclined surface. Then, the framework structure body 11 is constituted by including a diagonal material 12 for forming the upper surface (inclined surface) of the handrail wall 10, a vertical material 14 provided between the wall panel 2 and the diagonal material 12, and a horizontal material 15 provided between the wall panel 2 and the vertical material 14. Thereby, an upper part of the handrail wall 10 including the inclined surface (upper surface) is constituted by the framework structure body 11 formed by being framed on the wall panel 2.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a staircase handrail wall. [Background technology]

[0002] Patent Document 1 discloses a technology relating to a building whose walls (exterior and interior walls) are constructed from wall panels. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2016-037772 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for a carbon-neutral society, which aims to achieve virtually zero carbon dioxide emissions, and for the achievement of the Sustainable Development Goals (SDGs).In the construction industry, efforts are being made to build buildings using wood, which has a low carbon dioxide emission.As a result, it is desirable for staircase handrails to also be made entirely of wood. If the handrail wall is constructed only from wall panels, it is possible to make the entire wall wooden.The handrail wall of a staircase has an inclined surface on the entire top surface or part of it (almost the entire surface except for a small part), so by combining, for example, a rectangular wall panel (a rectangular wall panel) with a wall panel with an inclined surface (a right-angled triangular or right-angled trapezoid wall panel), it is possible to construct an entirely wooden handrail wall without using metal such as steel frames in the frame.

[0005] The inclination angle of the upper surface (inclined surface) of the balustrade wall is set to the same as the slope angle of the stairs, but the slope angle of the stairs varies depending on the size, layout, floor height, etc. of the building. Therefore, when constructing a balustrade wall with wall panels, it is necessary to prepare wall panels (wall panels with inclined surfaces) for the balustrade wall with an adjusted slope angle to match the slope angle of each individual staircase, which requires time and cost. On the other hand, if a standardized wall panel (wall panel with inclined surfaces) is used as a balustrade wall to avoid such increased time and cost, it may be necessary to change the design of the staircase (such as the slope of the stairs) to match the slope angle of the wall panel, which could reduce the flexibility of the staircase design.

[0006] The present invention was made in consideration of the above circumstances, and its objective is to provide a handrail wall that can contribute to the realization of a decarbonized society by promoting carbon neutrality and the achievement of the SDGs, while reducing the effort and cost while minimizing the impact on the design freedom of staircases. [Means for solving the problem]

[0007] The invention described in claim 1 is, for example, as shown in FIGS. 1 to 10, A balustrade wall 10 of a staircase 1, Wall panel 2 and a wooden framework structure 11 provided on the wall panel 2; The upper surface is an inclined surface, The framework structure 11 is a diagonal member 12 that forms the inclined surface; A vertical member 14 provided between the wall panel 2 and the diagonal member 12; and a horizontal member 15 provided between the wall panel 2 and the vertical member 14. And, The framework structure 11 is A plurality of the diagonal members 12 arranged in series in the ascending and descending direction of the staircase 1; and an adjustment member 18a attached to the vertical member 14, Of the adjacent diagonal members 12, 12, one end is fixed to the vertical member 14, and the other end is fixed to the adjustment member 18a attached to the vertical member 14. It is characterized by the following.

[0008] According to the invention described in claim 1, the upper part of the balustrade wall 10, including the inclined surface (top surface), can be constructed with a framework structure 11 formed by framework assembly on the wall panel 2. Therefore, the balustrade wall 10 can be constructed without using a wall panel with an inclined surface that matches the gradient of the staircase 1, thereby reducing the effort and cost. Furthermore, the inclination angle of the inclined surface (top surface) can be set as desired, making it possible to construct a balustrade wall 10 that matches the gradient of each individual staircase, thereby minimizing the impact on the design freedom of the staircase 1. Furthermore, since the balustrade wall 10 is composed of a wall panel 2 (wooden panel) and a wooden frame structure 11, it can contribute to realizing a carbon-free society by promoting carbon neutrality and achieving the SDGs. In addition, an adjustment member 18a for supporting the end of one diagonal member 12 (the end that contacts the other diagonal member 12) is attached to the vertical member 14 that supports the end of the other diagonal member 12 (the end that contacts one diagonal member 12), so costs can be reduced compared to adding a vertical member 14 to support the end of the other diagonal member 12 (the end that contacts one diagonal member 12).

[0009] The invention described in claim 2 is For example, as shown in Figs. A balustrade wall 10 of a staircase 1, Wall panel 2 and a wooden framework structure 11 provided on the wall panel 2; The upper surface is an inclined surface, The framework structure 11 is a diagonal member 12 that forms the inclined surface; A vertical member 14 provided between the wall panel 2 and the diagonal member 12; and a horizontal member 15 provided between the wall panel 2 and the vertical member 14, The staircase includes a plurality of wall panels 2 arranged in series in the ascending and descending direction of the staircase 1, The plurality of wall panels 2 are characterized in that they are different in height dimension from one another, their lower end faces are flush with one another, and they are lined up in order of height.

[0010] According to the invention described in claim 2, The upper part of the balustrade wall 10, including the inclined surface (top surface), can be constructed with a framework structure 11 formed by framework assembly on the wall panel 2. This means that the balustrade wall 10 can be constructed without using wall panels with inclined surfaces that match the gradient of the stairs 1, thereby reducing the effort and cost. In addition, the inclination angle of the inclined surface (top surface) can be set as desired, making it possible to construct a balustrade wall 10 that matches the gradient of each individual staircase, thereby minimizing the impact on the design freedom of the stairs 1. Furthermore, since the balustrade wall 10 is composed of a wall panel 2 (wooden panel) and a wooden frame structure 11, it can contribute to realizing a carbon-free society by promoting carbon neutrality and achieving the SDGs. Furthermore, the multiple wall panels 2 that make up the balustrade wall 10 are arranged in staggered positions. This means that the vertical members 14 can be fixed not only to the upper end faces of the wall panels 2 but also to the step between the wall panels 2, 2 (the end face of the higher wall panel 2 (the end face that contacts the lower wall panel 2)), which increases the fixing strength of the framework structure 11 to the wall panel 2 and improves the structural stability and durability of the balustrade wall 10.

[0011] The invention described in claim 3 is For example, as shown in Figs. A balustrade wall 10 of a staircase 1, Wall panel 2 and a wooden framework structure 11 provided on the wall panel 2; The upper surface is an inclined surface, The framework structure 11 is a diagonal member 12 that forms the inclined surface; A vertical member 14 provided between the wall panel 2 and the diagonal member 12; and a horizontal member 15 provided between the wall panel 2 and the vertical member 14, The handrail wall 10 is covered with a covering material (fire-resistant covering material 5), Both surfaces of the frame structure 11 are covered with a plurality of the covering materials 5, The joints between the covering materials 5, 5 are located on the sides of the vertical members 14.

[0012] According to the invention described in claim 3, The upper part of the balustrade wall 10, including the inclined surface (top surface), can be constructed with a framework structure 11 formed by framework assembly on the wall panel 2. This means that the balustrade wall 10 can be constructed without using wall panels with inclined surfaces that match the gradient of the stairs 1, thereby reducing the effort and cost. In addition, the inclination angle of the inclined surface (top surface) can be set as desired, making it possible to construct a balustrade wall 10 that matches the gradient of each individual staircase, thereby minimizing the impact on the design freedom of the stairs 1. Furthermore, since the balustrade wall 10 is composed of a wall panel 2 (wooden panel) and a wooden frame structure 11, it can contribute to realizing a carbon-free society by promoting carbon neutrality and achieving the SDGs. In addition, since it is possible to fix the end of the covering material 5 (the end that contacts the adjacent covering material 5) to the vertical member 14, the fixing strength of the covering material 5 to the handrail wall 10 can be increased, improving the structural stability and durability of the handrail wall 10.

[0013] The invention described in claim 4 is For example, as shown in Figures 2, 3, 4, 6, 7, 9, and 10, in the handrail wall 10 according to any one of claims 1 to 3, The framework structure 11 includes a plurality of vertical members 14 arranged at intervals in the ascending and descending direction of the staircase 1, The horizontal member 15 is characterized in that it is arranged between the vertical member 14 (the lowest vertical member 14) among the plurality of vertical members 14 that is located on the lowest side in the lifting direction and the wall panel 2.

[0014] According to the invention described in claim 4, Of the multiple vertical members 14, the horizontal member 15 is provided between the vertical member 14 (the lowest vertical member 14) that bears the most vertical load and the wall panel 2, so the load is transmitted from the lowest vertical member 14 to the wall panel 2 via the horizontal member 15. Therefore, the load transmitted from the lowest vertical member 14 can be dispersed by the horizontal member 15, and the strength of the balustrade wall 10 (strength to withstand vertical loads) can be increased.

[0015] The invention described in claim 5 is For example, as shown in Figures 1, 2, 3, 4, 8, and 9, in the handrail wall 10 according to any one of claims 1 to 3, The upper surface has a horizontal surface in addition to the inclined surface, The framework structure 11 is a horizontal member 13 that forms the horizontal surface; It is characterized by comprising a reinforcing member 17 that connects the diagonal member 12 and the horizontal member 13.

[0016] According to the invention described in claim 5, Since a reinforcing member 17 that connects the diagonal member 12 and the horizontal member 13 is provided at the joint between the diagonal member 12 and the horizontal member 13, costs can be reduced compared to when a vertical member 14 is added to support the joint between the diagonal member 12 and the horizontal member 13.

[0017] The invention described in claim 6 is For example, as shown in FIG. 5(b), in the handrail wall 10 according to any one of claims 1 to 3, The framework structure 11 is A plurality of the diagonal members 12 arranged in series in the ascending and descending direction of the staircase 1; and a joint member 18b that connects the diagonal members 12, 12 to each other.

[0018] According to the invention described in claim 6, At the joints between the diagonal members 12, 12, a joint member 18b is provided to connect one diagonal member 12 to the other diagonal member 12, so costs can be reduced compared to adding a vertical member 14 to support the joints between the diagonal members 12, 12.

[0019] The invention described in claim 7 can be implemented as follows, for example, as shown in Figs. 3 In the handrail wall 10 described in before The covering material 5 covering both sides of the framework structure 11 is characterized in that it is provided across from the framework structure 11 to the wall panel 2.

[0020] According to the invention described in claim 7, the balustrade wall 10 is installed sandwiched on both sides by the covering material 5, and furthermore, the joint between the wall panel 2 and the framework structure 11 is covered with the covering material 5, so that the horizontal load acting on the framework structure 11 is not only transmitted directly to the wall panel 2, but also to the wall panel 2 via the covering material 5. Therefore, the horizontal load acting on the framework structure 11 can be efficiently transmitted to the wall panel 2 that supports the framework structure 11, and the strength of the balustrade wall 10 (strength to withstand horizontal loads) can be increased. [Effects of the Invention]

[0023] According to the present invention, a handrail wall for a staircase can be provided that can contribute to realizing a carbon-free society by promoting carbon neutrality and achieving the goals of the SDGs, while reducing the impact on the design freedom of the staircase and reducing the effort and cost involved. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 10 is a plan view showing an example of a stairwell equipped with a handrail wall. [Figure 2] FIG. 1 is a perspective view showing an example of a stairwell equipped with a handrail wall. [Figure 3] FIG. 10 is a side view showing an example of a handrail wall. [Figure 4] FIG. 10 is a side view showing an example of the arrangement of covering materials that cover the handrail wall. [Figure 5] FIG. 10 is an exploded perspective view of a main part showing a modified example of the handrail wall. [Figure 6] FIG. 10 is a diagram illustrating an example of assembly of a framework structure. [Figure 7] FIG. 10 is a diagram illustrating an example of assembly of a framework structure. [Figure 8] FIG. 10 is a diagram illustrating an example of assembly of a framework structure. [Figure 9] FIG. 10 is a diagram showing a modified example of the staircase. [Figure 10] FIG. 10 is a diagram showing a modified example of the staircase. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Note that the directions (front, back, left, right) in the following embodiments and illustrated examples are set solely for the convenience of explanation.

[0026] [Balustrade wall structure] 1 to 4, reference numeral 1 denotes a staircase connecting upper and lower floors. The staircase 1 is arranged in a space partitioned as a stairwell in a building such as a house, and is fixed to the framework of the building. The building is constructed using a panel construction method in which building components such as walls, floors, and roofs are pre-assembled into panels in a factory and then these panels are assembled at the construction site, but this is not limited to this and the building may also be constructed using traditional frame construction, wall construction, two-by-four construction, etc. The term "panel" refers to a building panel, which is made up of a rectangular frame made up of vertical and horizontal frame members assembled into a rectangular shape, a frame body made up of auxiliary beam members assembled vertically and horizontally inside this rectangular frame, and a face material attached to one or both sides of this frame body, resulting in a hollow structure. The hollow space inside (the back side of the face material) is usually filled with a heat insulating material such as glass wool or rock wool.

[0027] That is, in this embodiment, the building skeleton is made up of architectural panels such as wall panels 2, floor panels 3, and roof panels, as well as beams 4 that are laid between a plurality of wall panels 2. The structural materials (architectural panels, beams 4, etc.) that make up the skeleton are covered with fire-resistant covering material 5, and form the walls, floors, and ceilings of each room (such as a stairwell). In this embodiment, gypsum board is used as the fire-resistant covering material 5, but the fire-resistant covering material is not limited to this and may be other types of fire-resistant covering material.

[0028] The staircase 1 is a unit staircase comprising a plurality of staircase units. The staircase 1 in this embodiment comprises a plurality of straight staircase units, and is configured by combining these plurality of straight staircase units. The stair units that make up the staircase 1 are entirely or partially (almost entirely except for some parts) manufactured in advance in a factory.

[0029] In this embodiment, the staircase 1 is a straight staircase composed of multiple straight staircase units, but is not limited to this. Staircase units that can be used to compose the staircase 1 include straight staircase units, spiral staircase units, landing units, etc. For example, the staircase 1 may be a staircase composed of straight staircase units and landing units (return staircases, hinged staircases, straight staircases with landings, double-return staircases with landings, spiral staircases with upper and lower landings, etc.). Furthermore, spiral staircases and hinged staircases may be composed of spiral staircase units instead of landing units. Furthermore, the staircase 1 may be a staircase composed of straight staircase units and spiral staircase units (lower spiral staircases, upper spiral staircases, upper and lower spiral staircases (three-step spiral staircases with upper and lower spiral staircases), etc.). In other words, the type of staircase 1 is not particularly limited. Furthermore, the staircase 1 can be formed by freely combining each of the standardized staircase units described above, and the staircase units required to form the staircase 1 may be bundled together as a staircase set. In addition, the arrangement and quantity of the structural materials (architectural panels, beams 4, etc.) that make up the stairwell will be changed appropriately depending on the type of staircase 1.

[0030] A balustrade wall 10 is installed in the stairwell along the ascending and descending direction (front-to-back direction) of the stairs 1. The balustrade wall 10 is a sloped balustrade wall in which the entire upper surface or a portion (almost the entire upper surface except for a portion) is an inclined surface, and is composed of a wooden wall panel 2 formed in a rectangular parallelepiped shape and a wooden framework structure 11 formed by assembling a frame on the wall panel 2. In other words, the balustrade wall 10 is a spandrel wall composed of the wall panel 2 and framework members (diagonal members 12, horizontal members 13, vertical members 14, cross members 15, etc., which will be described later). As shown in Figures 2 to 4, the balustrade wall 10 of this embodiment has a horizontal surface at the end (front end) of the upper surface of the balustrade wall 10 on the ascending side in the ascending and descending direction of the stairs 1, and the remaining portion is an inclined surface.

[0031] The arrangement and number of wall panels 2 that make up the balustrade wall 10 are to be changed as appropriate depending on the size (planar length (front-to-back dimension), etc.) of the balustrade wall 10. For example, the number of wall panels 2 that make up the balustrade wall 10 may be one or more. The balustrade wall 10 of this embodiment includes three wall panels 2 arranged in a staggered arrangement as shown in Figures 2 and 3. That is, the balustrade wall 10 of this embodiment includes three wall panels 2 having different heights, and the bottom surfaces of the three wall panels 2 are flush with each other. The three wall panels 2 are arranged in order of height, with the wall panel 2 with the shortest height located on the lowermost side (rear side) in the ascending and descending direction of the stairs 1 and the wall panel 2 with the longest height located on the uppermost side (front side) in the ascending and descending direction of the stairs 1. Hereinafter, of the three wall panels 2, the wall panel 2 with the shortest height will be referred to as the "low wall panel," the wall panel 2 with the longest height will be referred to as the "high wall panel," and the wall panel 2 arranged between the low wall panel and the high wall panel will be referred to as the "middle wall panel."

[0032] The frame structure 11 is constructed by combining multiple pieces of sawn lumber (square timbers and planks). Specifically, as shown in Figures 2 and 3, the frame structure 11 is composed of diagonal members 12 and horizontal members 13 that form the upper surface of the parapet wall 10, multiple vertical members 14 that are spaced apart between the diagonal members 12 and horizontal members 13 and the wall panel 2, horizontal members 15 that are placed between the vertical members 14 and the wall panel 2, and base members 16 that are placed between the vertical members 14, 14. The thickness dimension (left-right dimension) of the frame structure 11 is set to be approximately the same as the thickness dimension (left-right dimension) of the wall panel 2.

[0033] The diagonal members 12 form the inclined surface of the upper surface of the handrail wall 10, and the horizontal members 13 form the horizontal surface of the upper surface of the handrail wall 10. A reinforcing member (splint) 17 is installed at the joint (joint) between the diagonal member 12 and the horizontal member 13. Specifically, the reinforcing member 17 is a connecting member that connects the diagonal member 12 and the horizontal member 13, and is installed on the underside of the diagonal member 12 and the horizontal member 13, spanning the diagonal member 12 and the horizontal member 13. It is also possible to add a vertical member 14 at a position supporting the joint between the diagonal member 12 and the horizontal member 13 without providing the reinforcing member 17, and fix the end of the diagonal member 12 (the end that contacts the horizontal member 13) and the end of the horizontal member 13 (the end that contacts the diagonal member 12) to the added vertical member 14. However, the reinforcing member 17 is shorter than the vertical member 14, and using the reinforcing member 17 is preferable because it reduces costs compared to adding the vertical member 14. Furthermore, the entire upper surface of the handrail wall 10 may be an inclined surface, in which case the horizontal member 13 (and the reinforcing member 17) is not provided.

[0034] The arrangement and number of diagonal members 12 that make up the frame structure 11 are to be changed as appropriate depending on the size of the handrail wall 10 (planar length (front-to-back dimension), etc.). For example, the number of diagonal members 12 that make up the frame structure 11 may be one, as shown in Figures 1 to 4, or may be multiple, as shown in Figure 5. In other words, the frame structure 11 may be equipped with multiple diagonal members 12 that are arranged side by side in the ascending and descending direction (front-to-back direction) of the staircase 1, and in that case, as shown in Figure 5, adjustment members (fillers) 18a and joint members (splints) 18b are provided at the joints between the diagonal members 12, 12.

[0035] Specifically, as shown in Figure 5(a), for example, when the joint (joint portion) between the diagonal members 12, 12 is located near one vertical member 14, and the end of one diagonal member 12 (the end that contacts the other diagonal member 12) is in a position where it can be fixed (for example, fixed with a screw) to the one vertical member 14, but the end of the other diagonal member 12 (the end that contacts the one diagonal member 12) is in a position where it is difficult to fix to the one vertical member 14, an adjustment member 18a (for example, an end piece of a vertical core member with a length of 200 mm or more) is attached to the upper end of the one vertical member 14. Then, the end of one diagonal member 12 (the end that contacts the other diagonal member 12) is fixed to the one vertical member 14 with a fixing device (such as a screw), adhesive, or a combination of these. In addition, the end of the other diagonal member 12 (the end that comes into contact with one of the diagonal members 12) is fixed to the adjustment member 18a using a fixing device (screw, etc.), adhesive, or a combination of these, thereby fixing it to the one vertical member 14 via the adjustment member 18a.

[0036] It is also possible to add a vertical member 14 at a position supporting the end of the other diagonal member 12 (the end that contacts one diagonal member 12) without providing the adjustment member 18a, and fix the end of the other diagonal member 12 (the end that contacts one diagonal member 12) to the added vertical member 14. However, the adjustment member 18a is shorter than the vertical member 14, and using the adjustment member 18a is preferable because it reduces costs compared to adding the vertical member 14.

[0037] Furthermore, for example, as shown in Figure 5(b), if the joint (connection) between the diagonal members 12, 12 is not located near the vertical member 14, that is, if the end of one diagonal member 12 (the end that contacts the other diagonal member 12) is in a position where it is difficult to fix (for example, fix with a screw) it to the vertical member 14, and the end of the other diagonal member 12 (the end that contacts one diagonal member 12) is also in a position where it is difficult to fix it to the vertical member 14, then one diagonal member 12 and the other diagonal member 12 are connected by a coupling member 18b. That is, a joint material 18b (for example, an end piece of a vertical core material having a length of 300 mm or more) is placed so as to cover the joint between the diagonal members 12, 12 from below, and both the end of one diagonal member 12 (the end piece that contacts the other diagonal member 12) and the end of the other diagonal member 12 (the end piece that contacts the one diagonal member 12) are fixed to the joint material 18b using fixing devices (screws, etc.), adhesive, or a combination of these.

[0038] It is also possible to add a vertical member 14 at a position supporting the joint between the diagonal members 12, 12 without providing the joint member 18b, and fix an end of one diagonal member 12 (the end that contacts the other diagonal member 12) and an end of the other diagonal member 12 (the end that contacts the one diagonal member 12) to the added vertical member 14. However, the joint member 18b is shorter than the vertical member 14, and using the joint member 18b is preferable because it reduces costs compared to adding a vertical member 14. Furthermore, when the handrail wall 10 has three or more diagonal members 12, the frame structure 11 may have an adjustment member 18a without a joint member 18b, or may have a joint member 18b without an adjustment member 18a, or may have both.

[0039] The multiple vertical members 14 are arranged side by side in the ascending and descending direction (front-to-back direction) of the staircase 1. The arrangement and number of the vertical members 14 constituting the framework structure 11 may be changed as appropriate depending on the size of the handrail wall 10 (planar length (front-to-back dimension), etc.). Hereinafter, among the multiple vertical members 14, the vertical member 14 located furthest down in the ascending and descending direction of the stairs 1 will be referred to as the "lowest vertical member 14," the vertical member 14 located furthest up in the ascending and descending direction of the stairs 1 will be referred to as the "top vertical member 14," and the vertical member 14 located between the bottom vertical member 14 and the top vertical member 14 will be referred to as the "middle vertical member 14." The framework structure 11 includes at least a lowermost vertical member 14 and an uppermost vertical member 14. In addition, one or more intermediate vertical members 14 may be included as required.

[0040] In the framework structure 11 of this embodiment, as shown in Figures 2 and 3, the lowest vertical member 14 is erected at the rear end of the upper end surface of the low wall panel, and the highest vertical member 14 is erected at the front end of the upper end surface of the high wall panel. In addition, intermediate vertical members 14 are erected at the front end of the upper end surface of the low wall panel (the step between the low wall panel and the middle wall panel) and at the front end of the upper end surface of the middle wall panel (the step between the middle wall panel and the high wall panel). Furthermore, intermediate vertical members 14 are erected at approximately the center in the fore-and-aft direction on the upper end surface of the low wall panel and at approximately the center in the fore-and-aft direction on the upper end surface of the high wall panel.

[0041] The horizontal member 15 is a reinforcing member provided to reinforce the vertical members 14, and is arranged between the lowest vertical member 14 and the wall panel 2 (low wall panel) that supports the lowest vertical member 14. The horizontal member 15 is placed on and fixed to the upper end surface of the wall panel 2 (low wall panel) in a state where it is connected to the lowest vertical member 14 in an L-shape, that is, in a state where it is joined to the lowest vertical member 14 and integrated as a single L-shaped member. Of the multiple vertical members 14, the vertical member 14 that receives the most vertical load is the lowest vertical member 14, which is fixed to the wall panel 2 via a horizontal member 15. Therefore, the horizontal member 15 can distribute the vertical load from the lowest vertical member 14, thereby improving the strength of the balustrade wall 10, specifically its strength to withstand vertical loads.

[0042] The base material (base plywood) 16 is a reinforcing member provided to support the bracket portion (handrail bracket) of the staircase handrail component, and is attached when the staircase handrail component is installed on the handrail wall 10. The base material 16 is bridged between adjacent vertical members 14, 14 with the left side surface (the surface facing the stairs 1) of the base material 16 being approximately flush with the left side surface (the surface facing the stairs 1) of the vertical member 14. Specifically, support members 16a are fixed to the opposing surfaces of the adjacent vertical members 14, 14, and the base material 16 is fixed between the support member 16a attached to one vertical member 14 and the support member 16a attached to the other vertical member 14. If no staircase handrail components are installed on the handrail wall 10, the base material 16 (and the support member 16a) do not need to be attached.

[0043] The balustrade wall 10 is covered entirely or partially (almost entirely except for a portion) with a fire-resistant covering material 5. Therefore, the balustrade wall 10 is installed in a state where it is sandwiched on both the left and right sides by a fire-resistant covering material 5 that covers the left side surface of the balustrade wall 10 (the surface facing the staircase 1), and a fire-resistant covering material 5 that covers the right side surface of the balustrade wall 10 (the surface opposite the staircase 1). Note that the fire-resistant covering material 5 is not shown in Figure 2. The arrangement and quantity of the fire-resistant covering material 5 that covers the balustrade wall 10 may be changed as appropriate depending on the size of the balustrade wall 10 (planar length (front-to-back dimension), etc.).

[0044] As shown in Figure 4, the fire-resistant covering material 5 covering the right side of the framework structure 11 is provided across the wall panel 2 that constitutes the parapet wall 10 and the framework structure 11. Similarly, the fire-resistant covering material 5 covering the left side of the framework structure 11 is provided across the wall panel 2 that constitutes the parapet wall 10 and the framework structure 11. That is, the parapet wall 10 is sandwiched on both the left and right sides by the fire-resistant covering material 5, and furthermore, the joints (joints) between the wall panels 2 and the framework structure 11 are covered with the fire-resistant covering material 5. This allows the horizontal load (particularly the load in the left-right direction) acting on the framework structure 11 to be efficiently transmitted to the wall panels 2 that support the framework structure 11, thereby improving the strength of the parapet wall 10, specifically its strength to withstand horizontal loads.

[0045] 4, the right side of the frame structure 11 is covered with a plurality of fire-resistant covering materials 5 (five fire-resistant covering materials 5 in FIG. 4). The width dimension (front-to-back dimension) of each fire-resistant covering material 5 covering the right side of the frame structure 11 is set so that one end (front end) of the fire-resistant covering material 5 in the width direction overlaps with one vertical member 14 (overlapping in a side view), and the other end (rear end) of the fire-resistant covering material 5 in the width direction overlaps with another vertical member 14 different from the one vertical member 14 (overlapping in a side view). Similarly, the left side surface of the framework structure 11 is also covered with a plurality of fire-resistant covering materials 5. The width dimension (front-to-back dimension) of each fire-resistant covering material 5 covering the left side surface of the framework structure 11 is also set so that one end (front end) of the fire-resistant covering material 5 in the width direction overlaps with one vertical member 14 on the left and right (overlaps in side view), and the other end (rear end) of the fire-resistant covering material 5 in the width direction overlaps with another vertical member 14 different from the one vertical member 14 on the left and right (overlaps in side view).

[0046] Therefore, among the fire-resistant covering materials 5 covering the balustrade wall 10, the joints (joint portions) between the fire-resistant covering materials 5, 5 adjacent in the ascending and descending direction of the staircase 1 are located on the sides of the vertical members 14, so that the ends of the fire-resistant covering materials 5, 5 that contact each other can be fixed to the same vertical member 14. That is, the end of one fire-resistant covering material 5 (the end that contacts the other fire-resistant covering material 5) and the end of the other fire-resistant covering material 5 (the end that contacts the one fire-resistant covering material 5) can be fixed to the same vertical member 14. In other words, the fire-resistant covering materials 5, 5 that are adjacent in the ascending and descending direction of the staircase 1 can be joined by one vertical member 14.

[0047] [Construction method for handrail walls] Next, an example of a method for constructing the balustrade wall 10 will be described with reference to FIGS. After the foundation work is completed, the framework assembly work is carried out on site. During the assembly work, the building panels and beams 4 that make up the staircase are assembled. That is, the installation work of the wall panels 2 that make up the balustrade wall 10 is carried out during the assembly work. If the balustrade wall 10 consists of multiple wall panels 2, a set of wall panels 2 corresponding to the plan length of the balustrade wall 10 (a set of wall panels 2 arranged in staggered steps) will be transported to the construction site. The installation of the staircase 1 is also carried out during the assembly work. The staircase units that make up the staircase 1 are assembled in advance in a factory or the like and then transported to the construction site.

[0048] After the construction of the framework is completed, the outer shape of the balustrade wall 10 is determined. Specifically, the stair components to be installed (stair units, existing stairs, skeleton stairs, etc.) are measured, the gradient angle of the stairs 1 is determined, and then the outer shape of the handrail wall 10 is determined. Then, based on the determined outer shape of the handrail wall 10, each member that makes up the framework structure 11 (diagonal members 12, horizontal members 13, vertical members 14, horizontal members 15, base members 16, etc.) is prepared. For example, a set of stiles (e.g., 30mm x 90mm square timbers) of a length and number corresponding to the planar length of the balustrade wall 10, vertical core materials (e.g., 38mm x 90mm square timbers) of a length and number corresponding to the planar length of the balustrade wall 10, and a number of plywood sheets (e.g., 150mm x 1820mm boards (9mm thick)) corresponding to the planar length of the balustrade wall 10 are transported to the construction site. The transported stiles are then processed to prepare diagonal members 12, horizontal members 13, cross members 15, etc. The transported vertical core materials are also processed to prepare vertical members 14, etc. The transported plywood sheets are also processed to prepare base materials 16, etc.

[0049] Next, as shown in FIG. 6, the lowest vertical member 14 is fixed to the wall panel 2. Specifically, first, as shown in Figure 6(a), the lowest vertical member 14 and horizontal member 15 are assembled in an L shape so that the rear surface of the lowest vertical member 14 and the rear end surface of the horizontal member 15 are flush with each other, and the lowest vertical member 14 is fixed to the top surface of the horizontal member 15 using fixing devices (e.g., structural screws), adhesive, or a combination of both. Then, as shown in Figure 6(b), the horizontal member 15, which is integral with the lowest vertical member 14, is fixed to the upper end surface of the wall panel 2 (low wall panel) using fasteners (screws, etc.), adhesive, or a combination of these. This allows the lowest vertical member 14 to stand upright on the wall panel 2 (low wall panel).

[0050] Next, as shown in FIGS. 7 and 8, the entire framework structure 11 is framed. Specifically, first, as shown in Figure 7, the top vertical member 14 is fixed to the top end surface of the wall panel 2 (high wall panel) using fasteners (screws, etc.), adhesive, or a combination of both. Also, the middle vertical members 14 are fixed to the stepped portions (top and rear end surfaces) of the wall panels 2 (low wall panel, middle wall panel, high wall panel) arranged in staggered steps using fasteners (screws, etc.), adhesive, or a combination of both. 7, the diagonal members 12 are fixed to the upper end surfaces of the vertical members 14 (the lowest vertical member 14 and the middle vertical members 14) erected on the wall panel 2 by using fasteners (screws, etc.), adhesive, or a combination of both. Furthermore, the middle vertical members 14 are positioned in the approximate center in the front-to-rear direction of the wall panel 2 (for example, the low wall panel and the high wall panel), and are fixed to the upper end surfaces of the wall panel 2 and the diagonal members 12 by using fasteners (screws, etc.), adhesive, or a combination of both.

[0051] 8, the horizontal member 13 is placed so that the front end of its underside contacts the upper end surface of the top vertical member 14 and the rear end surface of the horizontal member 13 contacts the front end surface of the diagonal member 12, and is fixed to the upper end surface of the top vertical member 14 using fasteners (screws, etc.), adhesive, or a combination of both. Furthermore, a reinforcing member 17 (for example, an offcut of a stile about 300 mm in length) is placed so as to straddle the diagonal member 12 and horizontal member 13, and is fixed to the underside of the diagonal member 12 and the underside of the horizontal member 13 using fasteners (screws, etc.), adhesive, or a combination of both. The upper end faces of the vertical members 14 (the lowest vertical member 14, the middle vertical members 14, and the highest vertical member 14) are inclined, and the angle of inclination is set to be the same as the gradient angle of the stairs 1. The spacing between the vertical members 14 is set to a length (for example, 455 mm or less) suitable for fixing the fire-resistant covering material 5. The both end faces (front and rear end faces) of the diagonal members 12 and horizontal members 13 are each vertical.

[0052] Next, as shown in Figures 2 and 3, the base material 16 is attached to complete the handrail wall 10. Specifically, the support beams 16a (e.g., scrap wood from rough siding, etc.) are fixed to the opposing surfaces (front and rear surfaces) of adjacent vertical members 14, 14 using fasteners (screws, etc.), adhesive, or a combination of both. Then, the base material 16 is placed between the pair of opposing support beams 16a, 16a and fixed using fasteners (screws, etc.), adhesive, or a combination of both. The vertical center line of the base material 16 is inclined, and the angle of inclination is set to be the same as the gradient angle of the staircase 1. Furthermore, both end surfaces (front and rear end surfaces) of the base material 16 are vertical surfaces.

[0053] Next, as shown in FIGS. 1 and 4, the balustrade wall 10 is covered with a fire-resistant covering material 5. Specifically, the fire-resistant covering material 5 is fixed to the wall panels 2 and framework structure 11 (mainly the diagonal members 12, horizontal members 13, vertical members 14, and cross members 15) that make up the parapet wall 10 using fasteners (screws, etc.), adhesive, or a combination of these. As shown in Figure 6(b), a gap G is provided between the staircase 1 and the wall panels 2 that make up the parapet wall 10, allowing the fire-resistant covering material 5 to be inserted between the staircase 1 and the wall panels 2 through this gap G. This allows almost the entire side surface (left and right surfaces) of the parapet wall 10 to be covered with the fire-resistant covering material 5.

[0054] Thereafter, the balustrade wall 10 is fitted with copings, stair railing parts, wallpaper, etc. In this manner, the construction of the balustrade wall 10 is completed. The coping may be attached before the balustrade wall 10 is covered with the fire-resistant covering material 5. Furthermore, the covering step of covering the walls, floor, and ceiling of the staircase with the fire-resistant covering material 5 can be performed at any timing. Specifically, the covering step may be performed simultaneously with the step of covering the balustrade wall 10 with the fire-resistant covering material 5, or may be performed after the assembly work of the framework is completed and before the outer shape of the balustrade wall 10 is determined. Furthermore, the covering step of covering the staircase 1 with the fire-resistant covering material 5 can be performed at any timing. Specifically, the covering step may be performed simultaneously with the step of covering the balustrade wall 10 with the fire-resistant covering material 5, or may be performed after the assembly work of the framework is completed and before the outer shape of the balustrade wall 10 is determined.

[0055] [Modification] The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. For example, the staircase 1 in the above-described embodiment (Figs. 1 to 8) is a straight staircase made up of multiple straight staircase units, and therefore has only one ascending and descending direction, but the staircase 1 may also be a staircase with multiple ascending and descending directions, as shown in Figs. 9 and 10, for example. That is, the staircase 1 in the above-described embodiment is provided with one handrail wall 10, but the staircase 1 may also be provided with multiple handrail walls 10, as shown in Figs. 9 and 10, for example.

[0056] The staircase 1 shown in Figure 9(a) is a return staircase composed of a straight staircase unit and a landing unit, and has two parallel ascending and descending directions (first ascending and descending direction and second ascending and descending direction). A handrail wall 10 (handrail wall 10A) is installed along the first ascending and descending direction, and a handrail wall 10 (handrail wall 10B) is installed along the second ascending and descending direction. As shown in Figure 9(b), the handrail wall 10A provided along the first ascending / descending direction is composed of one wall panel 2 and a framework structure 11 having diagonal members 12, vertical members 14, and horizontal members 15. The entire upper surface of this handrail wall 10A is an inclined surface, so it does not have horizontal members 13 (and reinforcing members 17). The handrail wall 10B, which is installed along the second lifting direction, is composed of two wall panels 2 arranged in staggered steps, and a frame structure 11 having diagonal members 12, horizontal members 13 (and reinforcing members 17), vertical members 14, and horizontal members 15, as shown in Figure 9(c).

[0057] The staircase 1 shown in Figure 10(a) is a hinged staircase composed of a straight staircase unit and a landing unit, and has two mutually perpendicular ascending and descending directions (third ascending and descending direction and fourth ascending and descending direction). A handrail wall 10 (handrail wall 10C) is installed along the third ascending and descending direction, and a handrail wall 10 (handrail wall 10D) is installed along the fourth ascending and descending direction. As shown in Figure 10(b), the handrail wall 10C provided along the third ascending / descending direction is composed of one wall panel 2 and a framework structure 11 having diagonal members 12, vertical members 14, and horizontal members 15. The entire upper surface of this handrail wall 10C is an inclined surface, so it does not have horizontal members 13 (and reinforcing members 17). As shown in Figure 10(b), the balustrade wall 10D provided along the fourth ascending / descending direction is composed of wall panels 2 (for example, multiple wall panels 2 arranged in staggered steps) and a framework structure 11 having diagonal members 12, horizontal members 13, vertical members 14, and horizontal members 15. Of the upper surface of this balustrade wall 10D, the end on the downward side in the ascending / descending direction of the stairs 1 (fourth ascending / descending direction) is a horizontal plane.

[0058] In the above-described embodiment (FIGS. 1 to 8), a horizontal surface is provided on the upper surface of the balustrade wall 10 at the end on the ascending side in the ascending / descending direction of the stairs 1, and the remaining portion is an inclined surface, but this is not limited to this. For example, as in the balustrade wall 10D shown in FIG. 10, a horizontal surface may be provided on the upper surface of the balustrade wall 10 at the end on the descending side in the ascending / descending direction of the stairs 1. Also, a horizontal surface may be provided on the upper surface of the balustrade wall 10 in approximately the center in the ascending / descending direction of the stairs 1 (between the end on the ascending side and the end on the descending side). Alternatively, multiple horizontal surfaces may be provided (for example, at both ends on the ascending side and the descending side in the ascending / descending direction of the stairs 1).

[0059] 〔effect〕 According to this embodiment (including the modified examples), the following excellent effects are achieved. That is, the handrail wall 10 of this embodiment is a handrail wall of a staircase 1 that connects the upper and lower floors of a building, and comprises a rectangular (rectangular) wall panel 2 and a wooden frame structure 11 provided on the wall panel 2, with the upper surface being an inclined surface, and the frame structure 11 is configured with diagonal members 12 that form the inclined surface, vertical members 14 provided between the wall panel 2 and the diagonal members 12, and horizontal members 15 provided between the wall panel 2 and the vertical members 14.

[0060] Therefore, the upper part of the balustrade wall 10, including the inclined surface (upper surface), can be constructed of a framework structure 11 formed by framework mounting on the wall panel 2. In this way, by constructing the upper part of the balustrade wall 10, including the inclined surface (top surface), using a framework structure 11, it is possible to build the balustrade wall 10 without using wall panels (wall panels shaped like right triangles or right-angled trapezoids) with an inclined surface that matches the gradient of the stairs 1, thereby reducing the effort and cost. Also, by constructing the upper part of the balustrade wall 10, including the inclined surface (top surface), using a framework structure 11, it is possible to set the inclination angle of the inclined surface as desired and build a balustrade wall 10 that matches the gradient of each individual staircase, thereby minimizing the impact on the design freedom of the stairs 1. Furthermore, the balustrade wall 10 of this embodiment is composed of a wall panel 2 (a wooden architectural panel) and a wooden framework structure 11. In other words, the balustrade wall 10 of this embodiment is a wooden spandrel wall that does not use metal such as steel frames in its framework, and therefore can contribute to realizing a carbon-free society by promoting carbon neutrality and achieving the SDGs.

[0061] In addition, in the handrail wall 10 of this embodiment, the frame structure 11 has a plurality of vertical members 14 arranged at intervals in the ascending and descending direction of the stairs 1, and the horizontal member 15 is provided between the vertical member 14 (the lowest vertical member 14) that is located furthest down in the ascending and descending direction of the stairs 1 and the wall panel 2. That is, the horizontal member 15 is provided between the vertical member 14 (the lowest vertical member 14) that receives the most vertical load among the multiple vertical members 14, and the wall panel 2, so the load is transmitted from the lowest vertical member 14 to the wall panel 2 via the horizontal member 15. Therefore, the load transmitted from the lowest vertical member 14 can be dispersed by the horizontal member 15, and the strength of the balustrade wall 10 (strength to withstand vertical loads) can be increased.

[0062] Note that the vertical member 14 between which the horizontal member 15 is provided is not limited to one vertical member 14 (the lowest vertical member 14), but may be a plurality of vertical members 14 (including the lowest vertical member 14). Furthermore, when horizontal members 15 are provided between a plurality of vertical members 14 and the wall panel 2, the horizontal members 15 provided between each vertical member 14 and the wall panel 2 may be independent, or may be connected to each other to form an integrated structure (including the case where a single horizontal member 15 is provided between a plurality of vertical members 14 and the wall panel 2). As in this embodiment, by providing horizontal members 15 only to the vertical member 14 (the lowest vertical member 14) among the multiple vertical members 14 that is subjected to the greatest vertical load, the number of parts that make up the frame structure 11 can be reduced as much as possible, and the frame structure 11 can also be easily assembled.

[0063] Furthermore, in the handrail wall 10 of this embodiment, if the upper surface of the handrail wall 10 has a horizontal surface in addition to an inclined surface, the frame structure 11 can be configured to include a horizontal member 13 that forms the horizontal surface and a reinforcing member 17 that connects the diagonal member 12 and the horizontal member 13. By configuring it in this manner, a reinforcing member 17 that connects the diagonal member 12 and the horizontal member 13 is provided at the joint between the diagonal member 12 and the horizontal member 13, thereby reducing costs compared to adding a vertical member 14 to support the joint between the diagonal member 12 and the horizontal member 13.

[0064] Furthermore, in the handrail wall 10 of this embodiment, when the dimensions of the handrail wall 10 (dimensions in the gradient direction of the stairs 1) are long, the frame structure 11 can be provided with a plurality of diagonal members 12 arranged in a series in the ascending and descending direction of the stairs 1, and an adjustment member 18a attached to the vertical member 14, and one end of adjacent diagonal members 12 (the end that contacts the other diagonal member 12) can be fixed to the vertical member 14, and the other end (the end that contacts one diagonal member 12) can be fixed to the adjustment member 18a attached to the vertical member 14. By configuring it in this manner, an adjustment member 18a for supporting the end of one diagonal member 12 (the end that contacts one diagonal member 12) is attached to the vertical member 14 supporting the end of the other diagonal member 12 (the end that contacts one diagonal member 12), so costs can be reduced compared to adding a vertical member 14 to support the end of the other diagonal member 12 (the end that contacts one diagonal member 12).

[0065] Furthermore, in the handrail wall 10 of this embodiment, if the dimensions of the handrail wall 10 (dimensions in the gradient direction of the stairs 1) are long, the frame structure 11 can be configured to include a plurality of diagonal members 12 arranged in series in the ascending and descending direction of the stairs 1, and joint members 18b that connect the diagonal members 12, 12 to each other. By configuring it in this manner, a joint member 18b that connects one diagonal member 12 to the other diagonal member 12 is provided at the joint between the diagonal members 12, 12, so costs can be reduced compared to adding a vertical member 14 to support the joint between the diagonal members 12, 12.

[0066] Furthermore, in the handrail wall 10 of this embodiment, when the dimension of the handrail wall 10 (the dimension in the gradient direction of the stairs 1) is long, it is possible to configure it with a plurality of wall panels 2 arranged in a row in the ascending and descending direction of the stairs, specifically, a plurality of wall panels 2 with different height dimensions, whose lower end faces are flush with each other, and which are arranged in order of height. With this configuration, the multiple wall panels 2 that make up the balustrade wall 10 are arranged in staggered positions. This means that some of the multiple vertical members 14 can be fixed not only to the upper end faces of the wall panels 2, but also to the step between the wall panels 2 (the end face of the higher wall panel 2 (the end face that contacts the lower wall panel 2)), which increases the fixing strength of the framework structure 11 to the wall panel 2 and improves the structural stability and durability of the balustrade wall 10. When the balustrade wall 10 is made up of a plurality of wall panels 2, one wall panel 2 and another wall panel 2 of the plurality of wall panels 2 may have the same height dimension. In other words, when the balustrade wall 10 is made up of a plurality of wall panels 2, the top end surfaces of one wall panel 2 and another wall panel 2 of the plurality of wall panels 2 may be flush with each other.

[0067] Furthermore, in the handrail wall 10 of this embodiment, the handrail wall 10 is covered entirely or partially (almost entirely except for a part) with a fire-resistant covering material 5 (covering material), and the fire-resistant covering material 5 that covers both sides of the frame structure 11 (the side on the staircase 1 side and the side opposite the staircase 1) is provided across from the frame structure 11 to the wall panel 2. That is, the parapet wall 10 is installed sandwiched on both sides by the fire-resistant covering material 5, and furthermore, the joint between the wall panel 2 and the framework structure 11 is covered with the fire-resistant covering material 5, so that the horizontal load acting on the framework structure 11 is not only transmitted directly to the wall panel 2, but also to the wall panel 2 via the fire-resistant covering material 5. Therefore, the horizontal load (particularly the load in the left-right direction) acting on the framework structure 11 can be efficiently transmitted to the wall panel 2 that supports the framework structure 11, thereby increasing the strength of the parapet wall 10 (strength to withstand horizontal loads).

[0068] Furthermore, in the handrail wall 10 of this embodiment, when both sides of the framework structure 11 (the side on the staircase 1 side and the side opposite the staircase 1) are covered with multiple fire-resistant covering materials 5, it is possible to configure the joints (joint portions) between the fire-resistant covering materials 5, 5 to be located on the side of the vertical member 14. By configuring it in this manner, it becomes possible to fix the end of the fire-resistant covering material 5 (the end that comes into contact with an adjacent fire-resistant covering material 5) to the vertical member 14, thereby increasing the fixing strength of the fire-resistant covering material 5 to the handrail wall 10 and improving the structural stability and durability of the handrail wall 10. The covering material that covers the balustrade wall 10 is not limited to the fire-resistant covering material 5, but may be, for example, a heat insulating panel or a sound absorbing panel. [Explanation of symbols]

[0069] 1 stairs 2 wall panels 5 Fireproof covering material (covering material) 10 Balustrade wall 11 Frame structure 12 Diagonal 13 Horizontal material 14 Vertical members 15 Crosspiece 17 Reinforcement 18a Adjustment material 18b Joint material

Claims

1. A staircase handrail wall, Wall panels and a wooden framework structure provided on the wall panel; The upper surface is an inclined surface, The framework structure includes: A diagonal member that forms the inclined surface; A vertical member provided between the wall panel and the diagonal member; a horizontal member provided between the wall panel and the vertical member, The framework structure includes: A plurality of the diagonal members arranged in series in the ascending and descending direction of the stairs; an adjustment member attached to the vertical member, A handrail wall characterized in that one end of adjacent diagonal members is fixed to the vertical member and the other end is fixed to the adjustment member attached to the vertical member.

2. A staircase handrail wall, Wall panels and a wooden framework structure provided on the wall panel; The upper surface is an inclined surface, The framework structure includes: A diagonal member that forms the inclined surface; A vertical member provided between the wall panel and the diagonal member; a horizontal member provided between the wall panel and the vertical member, a plurality of wall panels arranged in series in the ascending and descending direction of the stairs; The plurality of wall panels are arranged in order of height, with their lower end surfaces flush with one another.

3. A staircase handrail wall, Wall panels and a wooden framework structure provided on the wall panel; The upper surface is an inclined surface, The framework structure includes: A diagonal member that forms the inclined surface; A vertical member provided between the wall panel and the diagonal member; a horizontal member provided between the wall panel and the vertical member, The handrail wall is covered with a covering material, Both surfaces of the frame structure are covered with a plurality of the covering materials, A handrail wall characterized in that the joints between the covering materials are located on the sides of the vertical members.

4. The balustrade wall according to any one of claims 1 to 3, The framework structure includes a plurality of vertical members arranged at intervals in the ascending and descending direction of the stairs, A handrail wall characterized in that the horizontal member is arranged between the vertical member among the plurality of vertical members that is located furthest down in the lifting direction and the wall panel.

5. The balustrade wall according to any one of claims 1 to 3, The upper surface has a horizontal surface in addition to the inclined surface, The framework structure includes: A horizontal member that forms the horizontal surface; A handrail wall characterized by comprising a reinforcing member connecting the diagonal member and the horizontal member.

6. The balustrade wall according to any one of claims 1 to 3, The framework structure includes: A plurality of the diagonal members arranged in series in the ascending and descending direction of the stairs; A handrail wall characterized by comprising: a joint material that connects the diagonal materials to each other.

7. The balustrade wall according to claim 3, A balustrade wall characterized in that the covering material covering both sides of the frame structure is provided across from the frame structure to the wall panel.

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