Kick structure, method for constructing kick structure, and base material

Abstract

To provide a kick structure, a method for constructing the kick structure, and a base material which can be easily constructed and installed and can produce a staircase with a floating feeling.SOLUTION: Kick structures 1A and 1B, which are installed on a staircase having a stair base CB and a tread T1 whose nosing side protrudes lower than the kick side surface of the stair base CB, comprises a base material 2 extending in the width direction of the staircase and supporting the underside of the protruding tread T1 portion, and the base material 2 has a back portion 22 fixed to the kick side surface of the stair base CB and an upper portion 21 in contact with the underside of the protruding tread T1 portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a riser structure, a method for constructing a riser structure, and a base material. [Background technology]

[0002] A fixing structure for entrance stiles has been proposed that closes the gap between the stile member and the dirt floor, eliminating the need for tiling, and allows for easy and reliable fixing of the stile without using nails, etc. (See Patent Document 1.) According to this technology, by fixing a roughly L-shaped stile member to a base member, it is possible to easily install a stepped step. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-144435 Summary of the Invention [Problem to be solved by the invention]

[0004] Another example of a structure with steps is the riser structure of a staircase. Unlike the step at the entrance, a staircase has multiple risers in a row, making it all the more important to easily construct the riser structure. In recent years, particularly in the approach areas of buildings, there has been an increase in staircases where the riser is set long so that the nosing of the tread projects further forward than the riser itself, reducing the presence of the riser and creating a floating feeling, as if the tread is floating independently. In addition, as shown in Figure 28, a comprehensive staircase design that further enhances the floating feeling of the staircase is becoming popular by combining indirect lighting IL placed so that it illuminates directly below the tread.

[0005] However, creating such a floating approach staircase requires a lot of man-hours, and currently each construction site handles it individually. To make the tread nosings project farther forward than the risers, there are several methods, such as placing a separate flat plate for the projection and then placing the treads on top of that, or separating the base and projection sections, assembling formwork, and pouring concrete. However, neither method is easy to construct, requiring a long period of work by skilled craftsmen, and the construction costs are high.

[0006] The present disclosure aims to provide a riser structure, a riser structure construction method, and a base material that can be easily constructed and installed and can create a floating staircase. [Means for solving the problem]

[0007] The present disclosure relates to a kicker structure to be installed on a staircase comprising a staircase base and a tread whose nosing side protrudes lower than the kicker side surface of the staircase base, the kicker structure comprising a base material extending in the width direction of the staircase and supporting the underside of the protruding tread portion, the base material having a back portion fixed to the kicker side surface of the staircase base and an upper surface portion in contact with the underside of the protruding tread portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing a floating step of the first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of FIG. 1. [Figure 3] FIG. 3 is an enlarged cross-sectional view of a portion taken along the line III-III in FIG. [Figure 4] 1 is an exploded perspective view from above showing the riser structure of the first embodiment. FIG. [Figure 5] FIG. 2 is an exploded perspective view from below showing the riser structure of the first embodiment. [Figure 6] FIG. 3 is a cross-sectional view showing how the base material of the first embodiment is attached. [Figure 7]3 is a cross-sectional view showing how the LED light source of the first embodiment is attached. FIG. [Figure 8] FIG. 3 is a cross-sectional view showing how the cover material of the first embodiment is attached. [Figure 9] FIG. 2 is a cross-sectional view showing how the side tiles of the first embodiment are installed. [Figure 10] FIG. 2 is a cross-sectional view showing how the floor tile of the first embodiment is installed. [Figure 11] FIG. 10 is a perspective view showing a floating step of a second embodiment. [Figure 12] FIG. 12 is an exploded perspective view of FIG. [Figure 13] FIG. 3 is an enlarged cross-sectional view of a portion taken along line XIII-XIII in FIG. 2. [Figure 14] FIG. 10 is an exploded perspective view from above showing the riser structure of the second embodiment. [Figure 15] FIG. 10 is an exploded perspective view from below showing the riser structure of the second embodiment. [Figure 16] FIG. 10 is a cross-sectional view showing how the cover material of the second embodiment is attached. [Figure 17] FIG. 10 is a cross-sectional view showing a first modified example of the floating step according to the present disclosure. [Figure 18] FIG. 10 is a cross-sectional view showing a second modified example of the floating step according to the present disclosure. [Figure 19] FIG. 10 is a cross-sectional view showing a third modified example of the floating step according to the present disclosure. [Figure 20] FIG. 10 is a cross-sectional view showing a fourth modified example of the floating step according to the present disclosure. [Figure 21] FIG. 10 is a cross-sectional view showing a fifth modified example of the floating step according to the present disclosure. [Figure 22] FIG. 10 is a cross-sectional view showing a sixth modified example of the floating step according to the present disclosure. [Figure 23] FIG. 10 is a cross-sectional view showing a seventh modified example of the floating step according to the present disclosure. [Figure 24] FIG. 10 is a cross-sectional view showing an eighth modification of the floating step according to the present disclosure. [Figure 25] FIG. 9 is a cross-sectional view showing a ninth modification of the floating step according to the present disclosure. [Figure 26] FIG. 13 is a cross-sectional view showing a tenth variation of the floating step according to the present disclosure. [Figure 27] FIG. 11 is a cross-sectional view showing an eleventh variation of the floating step according to the present disclosure. [Figure 28] FIG. 10 is a perspective view showing the floating steps of the second embodiment produced by LED light sources. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] Hereinafter, a first embodiment of the present disclosure will be described in detail with reference to the drawings.

[0010] In the drawings of the present disclosure, four mutually orthogonal directions are represented as the "Fr direction," "Rr direction," "R direction," and "L direction." The "Fr direction" indicates the direction toward the lower steps of the floating step 10A (lower step side), the "Rr direction" indicates the direction toward the upper steps of the floating step 10A (upper step side), the "R direction" indicates the right direction when viewing the floating step 10A from the front, and the "L direction" indicates the left direction when viewing the floating step 10A from the front.

[0011] As shown in Figure 3, the floating steps 10A are highly designed stairs that reduce the presence of the risers T3 by lengthening the stair risers and widening the width X of the floor tiles T1, giving the impression that the floor tiles T1 are floating independently. When combined with the LED light sources 4, indirect lighting can be created to further accentuate the floating effect, so the main installation locations are outdoor spaces such as building approaches and entrances, but the present disclosure is not limited to this. For example, the floating steps 10A can be installed in any space where a floating staircase is desired to enhance the design, such as the indoor space of a commercial facility.

[0012] As shown in FIG. 1 , the floating step 10A is a straight staircase with a plurality of floor tiles T1 serving as treads. In this embodiment, two different sizes of tiles are used for the floor tiles T1, but the present disclosure is not limited to this. Depending on the intended use, treads of any size may be combined to form a staircase as long as a sufficient tread surface is ensured while taking safety into consideration. For example, a staircase with uniform treads may be formed using floor tiles T1 of all the same size. Furthermore, the type of staircase is not limited to a straight staircase; the present disclosure can be applied to various types of staircases, such as a folded staircase, as long as they have a riser structure.

[0013] As shown in Figure 2, the floating step 10A includes a concrete block CB, a riser T3, a tile riser structure 1A (hereinafter referred to as riser structure 1A), and a finishing tile T. The concrete block CB is the stair base of the floating step 10A, formed by standard staircase block masonry construction. Note that Figure 2 omits the base concrete that forms the foundation of the concrete block CB, the reinforcing bars arranged in the staircase block, and the concrete poured into the holes in the staircase block. As shown in Figures 2 and 3, the concrete block CB has a side portion CB1 exposed in the Fr direction and a top portion CB2.

[0014] In the present disclosure, the configuration of the staircase base is not limited to this, and the staircase base can be freely configured depending on the application. For example, when installing the floating steps 10A on a slope, the lower part of the staircase blocks can be configured to be slanted to match the base concrete poured at an angle. Furthermore, the staircase base in the present disclosure is not limited to concrete blocks CB, and the staircase base can be configured, for example, by pouring concrete using formwork.

[0015] 2 and 3, riser T3 is a long member that is placed on the side surface CB1 of concrete block CB, extending in the left-right direction. Riser T3 is fixed to concrete block CB with adhesive G, such as adhesive cement or concrete adhesive. As described above, floating step 10A has a wide overhang width (rise width) X of floor tile T1, and when using the stairs, the view is from diagonally above, making it difficult to see riser T3 placed at the feet.

[0016] However, when looking up the stairs from the entrance of the floating step 10A, the riser T3 comes into view. For this reason, decorative tiles with a high level of design are used for the riser T3, which can shield the concrete blocks CB that form the base of the stairs from view. The riser T3 and the finishing tiles T may be made of the same material, or they may be made of different types of tiles. Furthermore, a decorative material other than tiles may also be used for the riser T3. For example, a glass material that has the effect of diffusing the light emitted from the LED light source 4 may be used for the riser T3.

[0017] As shown in Figures 4 and 5, the riser structure 1A includes a base material 2, a tile-type cover material 3 (hereinafter referred to as the cover material 3), and an LED light source 4. The base material 2 is made of a shaped material obtained by extruding a metal such as aluminum, for example, but is not limited to this. The base material 2 is a long material that is placed on the side portion CB1 of the concrete block CB, extending in the width direction of the stairs, and is configured in a roughly rectangular shape with a portion open in the Fr direction.

[0018] The base material 2 has an upper surface portion 21, a back surface portion 22, a bottom surface portion 23, an inclined surface portion 24, a step portion 25, a front surface portion 26, a first engaged portion 27, a second engaged portion 28, and a pair of hook pieces 29. As shown in FIG. 3 , the back surface portion 22 of the base material 2 is fixed via a screw to a side surface portion CB1, which is the riser side surface of the concrete block CB. The upper surface portion 21 is fitted with the underside of a floor tile T1 that protrudes further toward the lower step of the stairs than the side surface portion CB1 of the concrete block CB. The upper surface portion 21 comes into contact with the underside of the protruding floor tile T1, allowing the base material 2 to support the protruding portion of the floor tile T1.

[0019] The base material 2 has a hollow portion H1, which is formed by a back surface portion 22, a top surface portion 21, and an inclined surface portion 24 that connects the back surface portion 22 and the top surface portion 21. This configuration improves the strength of the base material 2 and the durability of the riser structure 1A. The step portion 25 is formed at the end of the lower step of the top surface portion 21, recessed downward. The step portion 25 functions to prevent the cover material 3 from falling off the base material 2 when the base material 2 and the cover material 3 are engaged; the fall-off prevention function will be described later.

[0020] The first engaged portion 27 and the second engaged portion 28 are engaged portions that engage with the cover material 3. The first engaged portion 27 is formed at the end of the lower section of the top surface portion 21 by bending from the front surface portion 26 toward the Rr direction at a substantially right angle. The second engaged portion 28 is formed at the end of the lower section of the bottom surface portion 23. The end of the first engaged portion 27 is bent obliquely upward from the flat portion 271 toward the Rr direction to form a hook portion 272. The end of the second engaged portion 28 is bent upward at a substantially right angle to form a hook portion 281. The second engaged portion 28 has a concave shape relative to the bottom surface portion 23 and is configured to hold a component in the concave portion. The bottom surface portion 23 has a pair of hook pieces 29 that protrude from the bottom of the back surface portion 22 toward the lower section. The LED light source 4 is engaged with the hook pieces 29, and the wiring of the LED light source 4 is placed on the bottom surface portion 23. An opening is formed between the first engaged portion 27 and the second engaged portion .

[0021] As shown in Figures 4 and 5, the cover material 3 is a lid member that engages with the base material 2 and is attached to the lower step of the stairs. The cover material 3 is made of a shaped material obtained by extruding a metal such as aluminum, but is not limited to this. The left-right length of the cover material 3 is the same as that of the base material 2, and like the base material 2, it is a long material that is arranged to extend in the left-right direction. The cover material 3 has a folded piece 31, an angle portion 30, a first protruding piece 34, a second protruding piece 35, a first engaging portion 36, and a second engaging portion 37.

[0022] As shown in Fig. 3, the angle portion 30 has a vertical surface portion 32 and a horizontal surface portion 33. The vertical surface portion 32 is a vertical surface that extends in a substantially vertical direction, and a folded piece 31 is formed at the upper end of the vertical surface portion 32, extending in a substantially horizontal direction toward the upper step side, and positioned above the step portion 25. Furthermore, at the lower end of the vertical surface portion 32, a horizontal surface portion 33 is formed, extending in a substantially horizontal direction toward the lower step side, and capable of holding a finishing material.

[0023] The angle portion 30 is configured in a substantially L-shape with a vertical surface portion 32 and a horizontal surface portion 33, and the side tile T2 can be placed and held on top of the horizontal surface portion 33. The side tile T2 is installed on the cover material 3 so that it is aligned with the angle portion 30 and is flush with the nosing T11 of the floor tile T1. When the cover material 3 engages with the base material 2, the folded piece 31 is installed by engaging with the step portion 25 of the base material 2, forming a hollow portion H2. The folded piece 31 of the cover material 3 and the upper surface portion 21 of the base material 2 are configured to be flush with each other, and the floor tile T1 is installed on top.

[0024] Because the side tiles T2 are exposed in the Fr direction, there is a risk that they may be kicked in the Rr direction when the stairs are used. At that time, the force of the kick could cause the position of the cover material 3 to shift, causing the base material 2 and cover material 3 to become disengaged. However, if the cover material 3 falls vertically, the fold-back piece 31 moves downward the distance of the hollow portion H2, and then the fold-back piece 31 engages with the step portion 25 of the base material 2, thereby securing the cover material 3 to the base material 2. This configuration prevents the cover material 3 from falling off the base material 2.

[0025] The first protruding piece 34 is a plate piece that protrudes diagonally upward in the Rr direction from the upper part of the vertical surface portion 32. A first engaging portion 36 is formed at the end of the first protruding piece 34 and is configured to engage with the first engaged portion 27 of the base material 2. The second protruding piece 35 is located at the lower part of the first protruding piece 34 and, like the first protruding piece 34, protrudes diagonally upward in the Rr direction from the vertical surface portion 32. The second protruding piece 35 protrudes further in the Rr direction than the first protruding piece 34. A second engaging portion 37 is formed at the end of the second protruding piece 35 and is configured to engage with the second engaged portion 28 of the base material 2.

[0026] The first engaging portion 36 has a hook portion 361 having a substantially triangular shape. When the hook portion 272 of the base material 2 engages with the hook portion 361 of the cover material 3, the first engaged portion 27 is engaged with and fixed to the first engaging portion 36. The second engaging portion 37 has a substantially U-shape in which the tip of the second protruding piece 35 is bent twice at a substantially right angle, and the tip is further bent to form a flat portion 371. When the hook portion 281 of the base material 2 engages with the flat portion 371 of the cover material 3, the second engaged portion 28 is engaged with and fixed to the second engaging portion 37. With this configuration, the cover material 3 and the base material 2 can be firmly fixed together.

[0027] Because the second engaging portion 37 of the cover material 3 is substantially U-shaped, even if the first engaging portion 36 comes off the first engaged portion 27 of the base material 2, the second engaging portion 37 can remain in the concave-shaped second engaged portion 28 of the base material 2, as shown by the two-dot chain line in Figure 3 for the cover material 3. With this configuration, work can be done while the cover material 3 is fastened to the base material 2, making installation and maintenance work extremely easy.

[0028] For example, when storing the wiring and battery of the LED light source 4 above the bottom surface portion 23 of the base material 2, there is no need to place the cover material 3 on the floor after removing it, so wiring work can be done efficiently without having to consider securing work space or maintaining the removed cover material 3. Furthermore, as will be described later, when attaching and detaching the cover material 3 to and from the base material 2, the work can be done while the cover material 3 is temporarily placed on the second engaged portion 28 of the base material 2, improving work efficiency.

[0029] 4 and 5, the distance between the first protruding piece 34 and the second protruding piece 35 of the cover material 3 is approximately the same as the opening of the base material 2, and the cover material 3 can be easily fixed to the base material 2 simply by inserting the first protruding piece 34 and the second protruding piece 35 into the base material 2 through the opening. With this configuration, no tools are required, and anyone can easily attach and install the cover material 3 to the base material 2 in a short amount of time.

[0030] 3, the LED light source 4 includes an LED tube 41, a substrate 42, and an LED element 43. The LED light source 4 is a seamless, long LED light source that extends in the longitudinal direction of the base material 2. The LED tube 41 has a cylindrical shape with a hollow portion at the top, and an LED light emitter is installed in the hollow portion.

[0031] The LED tube 41 is a deformable silicone tube that has the effect of diffusing irradiated light to the outside. The LED tube 41 has a pair of engagement grooves 41a and 41b along the longitudinal direction on the front and back surfaces. The engagement grooves 41a and 41b are respectively engaged with the pair of hook pieces 29 on the base material 2, so that the LED light source 4 is securely fixed to the base material 2.

[0032] The substrate 42 is installed on the ceiling surface of the hollow section and is exposed facing downward. The LED elements 43 are arranged continuously on the exposed surface of the substrate 42 facing downward and are light sources that irradiate light downward into the riser structure 1A. The LED light source of this embodiment includes a deformable silicone LED tube 41, but the LED light source of the present disclosure is not limited to this. As long as it has sufficient illuminance, an LED bar light combining a reflector and a bar-type LED substrate may be used, or a fluorescent-type LED light may be installed.

[0033] In addition, a cable (not shown) extends from the LED light source 4, and the LED light source 4 is lit by connecting a lighting connector (not shown) at the tip of the cable to a power cable (not shown) via a connector. The cables (not shown) can be stored in the upper part of the bottom surface 23 of the base material 2, and after the cover material 3 is fixed to the base material 2, they have a concealing effect of shielding the cables from the outside. This improves the design of the floating step 10A.

[0034] As shown in Figure 2, the finishing tiles T are decorative materials used in the finishing work when constructing the floating step 10A. The specifications of this embodiment are not limited to those of the present invention, and any type of tile can be used in any combination depending on the application, and there are no restrictions on the material. The finishing tiles T can be any decorative material as long as they are thin and can be attached to the floor as a finishing material.

[0035] The finishing tiles T include floor tiles T1 and side tiles T2. As shown in FIGS. 2 and 3, the floor tiles T1 are used as treads, with their nosings projecting downward beyond the side surfaces CB1 of the concrete blocks CB. The side tiles T2 are installed on the angle portions 30 of the cover material 3 so that they are flush with the nosings T11 of the floor tiles T1 in the Fr direction. The floor tiles T1 and the side tiles T2 may be the same type of tile, or may be different types of tile depending on the application. Furthermore, the thickness of the finishing tiles T is not limited to this embodiment; for example, thinner tiles can also be used. The installation method will be described later; the finishing tiles T are fixed in place using an adhesive G, such as adhesive cement or concrete adhesive, as in typical tile installation work.

[0036] Next, a construction method for the floating step 10A will be described in detail with reference to the drawings. First, as shown in FIG. 2, concrete blocks CB are constructed as the stair base using stair blocks. As shown in FIG. 3, the floating step 10A of this embodiment uses a riser structure 1A, in which the nosing T11 of the floor tile T1 serving as the tread protrudes further forward than the riser, eliminating the need for a separate flat plate for protrusion. Therefore, when designing the riser, only the thickness of the floor tile T1 needs to be considered. This configuration simplifies the design of the riser for the concrete block CB and allows for efficient construction.

[0037] Next, riser plate T3 is fixed to the side surface CB1 of concrete block CB using adhesive G, such as adhesive cement or concrete adhesive. As shown in Figure 3, the height of riser plate T3 is set so that the upper end of riser plate T3 is shielded by cover material 3 when viewed from the Fr direction. Furthermore, because the back surface 22 of base material 2 is fixed to the top of side surface CB1, the height of riser plate T3 is set with sufficient clearance. This configuration provides a screen that shields the upper ends of base material 2 and riser plate T3 from the Fr direction, improving the design of floating step 10A.

[0038] Next, the riser structure 1A is installed on the concrete block CB. First, as shown in Figure 6, the base material 2 is extended left and right and fixed to the concrete block CB. The back surface 22 of the base material 2 is aligned with the side surface CB1 of the concrete block CB, and the top surface 21 of the base material 2 is installed flush with the top surface CB2 of the concrete block CB. The back surface 22 of the base material 2 is fixed to the side surface CB1 of the concrete block CB using multiple screws. At this time, since there are no other structures in the Fr direction and the opening of the base material 2 is wide in the Fr direction, the base material 2 can be easily fixed using power tools. This configuration allows for efficient installation of the base material 2.

[0039] Next, as shown in FIG. 7 , the LED light source 4 is attached to the base member 2. The engaging grooves 41a and 41b of the LED light source 4 are engaged with the paired hook pieces 29 provided on the bottom of the base member 2, extending in the left-right direction and securing the LED light source 4. Furthermore, cables (not shown) can be routed along the bottom surface 23 and stored inside the base member 2 on the Rr side of the opening. This configuration makes the wiring of the LED light source 4 invisible from the outside, improving the design of the floating step 10A. The LED light source 4 may also be attached, for example, at the end of the construction of the riser structure 1A. The order in which the LED light source 4 is attached to the base member 2 is not limited to this. In this case, the cover member 3 attached to the base member 2 is released from its engagement, and the cover member 3 is temporarily placed on the second engaging portion 28 of the base member 2, allowing for wiring work.

[0040] Next, as shown in Figure 8, the cover material 3 is attached to the base material 2. First, the second engaging portion 37 of the cover material 3 is hooked onto the second engaged portion 28 of the base material 2 to hold the cover material 3 in place. From this temporarily fixed state, the cover material 3 is rotated in the direction of the arrow around the flat portion 371 of the cover material 3 as the central axis, and the first protruding piece 34 is inserted into the opening. The hook portion 361 of the first engaging portion 36 provided at the tip of the inserted first protruding piece 34 and the hook portion 272 of the base material 2 are securely engaged by the rotation.

[0041] As shown by the two-dot chain line in the cover material 3 after rotation, the first engaging portion 36 and the first engaged portion 27 engage with each other, causing the flat portion 371 of the second engaging portion 37 to lock into the recessed shape of the second engaged portion 28, ensuring secure engagement between the second engaging portion 37 and the second engaged portion 28. With this configuration, the cover material 3 can be securely fixed to the base material 2 with the simple operation of simply rotating the cover material 3, without using any tools. This completes the installation of the riser structure 1A.

[0042] Next, the finishing tiles T are attached. As shown in FIG. 9, first, the side tile T2 is bonded and fixed to the angle portion 30 of the cover material 3. As with typical tile attachment, the finishing tile T is attached and fixed using an adhesive G, such as adhesive cement or concrete adhesive, but the type of adhesive G used is not limited. The configuration of the angle portion 30 allows the side tile T2 to be placed on the horizontal surface portion 33, making it easy to attach the tiles to the side portion. This configuration allows the side tile T2 to be easily attached to the cover material 3 by adhesive alone. Finally, the floor tile T1 is bonded to the upper surface portion 21 of the base material 2 and the upper surface portion CB2 of the concrete block CB, and is then bonded and fixed. This completes the construction of the floating step 10A.

[0043] The present disclosure is not limited to the above-described embodiments and can be modified as appropriate.

[0044] For example, instead of constructing new concrete blocks CB, the floating steps 10A may be constructed using an existing staircase base. In this embodiment, the steps are constructed only with floor tiles T1 without using flat plates for projections, so the riser configuration is the same as that of a general staircase. This configuration allows the existing staircase base to be used to construct the floating steps 10A. In addition to new construction, the floating steps 10A with floating-feeling steps can be installed by renovating existing stairs.

[0045] In addition, in this embodiment, the riser structure 1A extends in the width direction of the stairs, and the base material 2 is arranged to support the underside of the protruding floor tile T1. However, the installation direction of the riser structure 1A is not limited to this. The riser structure 1A can also be installed along the side of the stairs. For example, by cutting the ends of the riser structure 1A at a 45-degree angle and butting the 45-degree ends together, the riser structure 1A can be configured to have a roughly U-shape. This roughly U-shaped riser structure 1A can be installed on the stair base so that it surrounds the stairs from three sides, including the lower step and the opposing side, and floor tiles T1 can be installed on top. Furthermore, by butting the ends of the riser structure 1A at a 90-degree angle, it is possible to create an outside or inside corner of the stairs.

[0046] [Second embodiment] Next, a second embodiment of the present disclosure will be described in detail with reference to the drawings. The second embodiment differs from the first embodiment in the shape of the cover material and the riser structure. The other configurations are the same as those of the first embodiment, so a description thereof will be omitted.

[0047] As shown in FIG. 1, the floating step 10A of the first embodiment is a riser structure 1A in which the side tiles T2 are exposed in the Fr direction. Also, as shown in FIG. 3, the cover material 3 has an angle portion 30 for fixing the side tiles T2. On the other hand, as shown in FIGS. 11 and 12, the floating step 10B of the second embodiment has a backsplash riser structure 1B (hereinafter referred to as the riser structure 1B), which is a riser structure that does not use the side tiles T2. Therefore, the finishing tile TA of the second embodiment is composed only of floor tiles T1. As shown in FIG. 13, the riser structure 1B has a backsplash-specification cover material 5 (hereinafter referred to as the cover material 5), which is different in that the cover material 5 itself is exposed in the Fr direction of the floating step 10B as a backsplash.

[0048] As shown in Figures 14 and 15, the riser structure 1B has a base material 2, a cover material 5, and an LED light source 4. Note that the base material 2 and the LED light source 4 are the same as those in the first embodiment, and therefore a description thereof will be omitted. The cover material 5 is formed from a shaped material obtained by extruding a metal such as aluminum, for example, but is not limited to this. The cover material 5 has a back panel 50, a first protruding piece 53, a second protruding piece 54, a first engaging portion 55, and a second engaging portion 56.

[0049] The top panel 50 is arranged to extend in the left-right direction and is exposed in the Fr direction. The top panel 50 also serves as a cover member for the base material 2 and as a finishing material for the floating step 10B. To improve the design of the floating step 10B, the surface of the lower tier of the cover material 5 is powder coated. This disclosure is not limited to this, and any finishing material that improves the design may be used, for example, a decorative sheet may be applied to the surface of the lower tier.

[0050] As shown in Figure 13, the top panel 50 has a vertical surface portion 51 and an inclined surface portion 52. The vertical surface portion 51 is arranged to cover the lower part of the nosing T11 of the floor tile T1, and has a protrusion 51a that protrudes in the Rr direction. Because the vertical surface portion 51 is arranged to cover only a portion of the lower part of the nosing T11 of the floor tile T1, the cover material 5 is not interfered with even if the floor tile T1 is stepped on with a foot when using the stairs. This configuration makes it possible to prevent the cover material 5 from shifting or falling off when the floating step 10B is in use.

[0051] The protrusion 51a is disposed in contact with the stair nosing T11, and a certain gap is formed between the vertical surface 51 and the stair nosing T11. For example, even if the skirting board 50 is kicked while using the stairs and an impact is applied in the Rr direction, the protrusion 51a can absorb the applied impact. This configuration can prevent the cover material 5 from shifting significantly due to an external impact, which would cause the cover material 5 to be disengaged from the base material 2.

[0052] As shown in Figure 11, the inclined surface portion 52 slopes downward toward the upper step, and the back panel 50 is formed by the inclined surface portion 52, so that the back panel 50 is difficult to see when using the stairs, resulting in a design that reduces its presence. This configuration emphasizes the protrusion width X of the floor tiles T1 serving as treads, further enhancing the floating feeling of the floating steps 10B. As shown in Figure 28, by combining this with the production of indirect lighting IL by the LED light sources 4, the presence of the back panel 50 is further reduced, thereby enhancing the floating feeling of the floating steps 10B.

[0053] The first protruding piece 53 is a plate piece that protrudes in the Rr direction from the upper part of the inclined surface portion 52 substantially perpendicular to the inclined surface portion 52. A first engaging portion 55 is formed at the end of the first protruding piece 53 and is configured to engage with the first engaged portion 27 of the base material 2. The second protruding piece 54 is located at the lower part of the first protruding piece 53 and, like the first protruding piece 53, protrudes in the Rr direction from the lower part of the inclined surface portion 52 substantially perpendicular to the inclined surface portion 52. A second engaging portion 56 is formed at the end of the second protruding piece 54 and is configured to engage with the second engaged portion 28 of the base material 2.

[0054] The first engaging portion 55 includes a recess 551 and a hook portion 552. The recess 551 is a bent recess continuing from the extending first projecting piece 53 and includes a substantially triangular hook portion 552 at its tip. The hook portion 272 of the base material 2 engages with the hook portion 552 of the cover material 5, thereby engaging and fixing the first engaged portion 27 to the first engaging portion 55. The second engaging portion 56 is formed in a substantially U-shape by bending the tip of the second projecting piece 54 twice at a substantially right angle, and the tip is further bent to form a flat portion 561. The hook portion 281 of the base material 2 engages with the flat portion 561 of the cover material 5, thereby engaging and fixing the second engaged portion 28 to the second engaging portion 56. This configuration enables the cover material 5 and the base material 2 to be firmly fixed together.

[0055] The second engaging portion 56 of the cover material 5 has the same shape as the second engaging portion 37 of the cover material 3. Therefore, as described above, the second engaging portion 56 of the cover material 5 can be fastened to the second engaged portion 28 of the base material 2, which has a concave shape, and the cover material 5 can be temporarily placed on the base material 2. The effects are the same as those of the first embodiment, so a description thereof will be omitted.

[0056] Next, the construction method of the floating step 10B will be described in detail with reference to the drawings. The second embodiment differs from the first embodiment in that the shape of the cover material and the riser structure are different, and the side tile T2 is not used when attaching the finishing tile T. The other configurations are the same as those of the first embodiment, so the description will be omitted.

[0057] As shown in Figure 16, a method for attaching the cover material 5 to the base material 2 will be described. First, the second engaging portion 56 of the cover material 5 is hooked onto the second engaged portion 28 of the base material 2 to hold the cover material 5 in place. From this temporarily fixed state, the cover material 5 is rotated in the direction of the arrow around the flat portion 561 of the cover material 5 as the central axis, and the first protruding piece 53 is inserted into the opening. The hook portion 552 of the first engaging portion 55 provided at the tip of the inserted first protruding piece 53 and the hook portion 272 of the base material 2 are securely engaged by the rotation.

[0058] The recess 551 provided in the first engaging portion 55 of the cover material 5 is configured to bypass the flat portion 271 of the base material 2, so that the hook portion 552 of the cover material 5 can smoothly engage with the hook portion 272 of the base material 2 by rotation. Furthermore, as shown in the cover material 5 after rotation indicated by the two-dot chain line, the recess 551 of the cover material 5 engages with the flat portion 271 and the hook portion 272 of the base material 2, thereby more firmly engaging the first engaging portion 55 of the cover material 5 with the first engaged portion 27 of the base material 2. This configuration can prevent the cover material 5 from falling off the base material 2.

[0059] Engagement of first engaging portion 55 and first engaged portion 27 causes flat portion 561 of second engaging portion 56 to lock into the recessed shape of second engaged portion 28, ensuring secure engagement between second engaging portion 56 and second engaged portion 28. With this configuration, the cover material 5 can be securely fixed to base material 2 with the simple operation of simply rotating cover material 5 without using any tools. This completes the installation of riser structure 1B.

[0060] As shown in Figure 13, the cover material 5 also functions as a finishing material, serving as a backsplash for the floating step 10B. Therefore, when attaching the finishing tiles TA, only the floor tiles T1 are installed. The installation method for the floor tiles T1 is the same as in the first embodiment, so a detailed explanation will be omitted. This configuration reduces the amount of finishing tiles used, thereby reducing installation costs and construction time.

[0061] The present disclosure is not limited to the above-described embodiments and can be modified as appropriate. Furthermore, as with the first embodiment, floating steps 10B, which give the treads a floating feel, can be installed not only in new construction but also by renovating existing stairs. Furthermore, a roughly U-shaped riser structure 1B can be installed on the staircase base so as to surround the stairs from three sides, including the lower step and the opposing side, with floor tiles T1 installed on top. Furthermore, by butting the ends of the riser structure 1B together at 90 degrees, it is possible to create external or internal corners in the staircase.

[0062] [Variation 1] Next, Modification 1 of the present disclosure will be described with reference to Figure 17. The floating step 10C includes a top board kick-in structure 1C (hereinafter referred to as kick-in structure 1C), which includes a base material 2B and a cover material 5B. The rest of the configuration is the same as in the embodiment, so a description thereof will be omitted.

[0063] The base material 2B has a storage compartment that is approximately rectangular and cylindrical. This configuration allows the LED light source 4 to be installed inside the storage compartment. The top of the cover material 5B is configured to cover the stair nosing T11 of the floor tile T1, and the tip is bent at an approximately right angle to be exposed on the surface of the floor tile T1. With this configuration, the cover material 5B is engaged and fixed to the floor tile T1, ensuring reliable fixation of the header board riser structure 1C.

[0064] [Variation 2] Next, Modification 2 of the present disclosure will be described with reference to Figure 18. The floating step 10D includes a top board kick structure 1D (hereinafter referred to as kick structure 1D), which includes a base material 2C and a cover material 5C. The rest of the configuration is the same as in the embodiment, so a description thereof will be omitted.

[0065] The cover material 5C can rotate around the engaging portion as a central axis by engaging an engaging portion provided on the top with an engaged portion provided on the top of the base material 2C. With this configuration, the cover material 5C can be temporarily held to the base material 2C by engaging the engaging portion provided on the top with the engaged portion, which makes installation and maintenance work very easy.

[0066] [Variation 3] Next, a third variation of the present disclosure will be described with reference to Figure 19. The floating step 10E includes a tiled kick-in structure 1E (hereinafter referred to as kick-in structure 1E), which has a base material 2D. The kick-in structure of this variation does not require a cover material. The rest of the configuration is the same as in the embodiment, so a description thereof will be omitted.

[0067] The base material 2D has an angled section in the Fr direction, and side tiles T2 can be installed on the angled section. The back surface, which is located in the Rr direction, is fixed to the concrete block CB via screws. The vertical surface of the angled section, the top surface of the base material 2D, and the back surface of the base material 2D are configured in an approximately U-shape, and a hollow section is formed by a plane located approximately in the center in the vertical direction. This configuration improves the strength of the base material 2D. Since no cover material is required, construction costs and time can be reduced.

[0068] The riser structure of the present disclosure can also be implemented in the forms of Modifications 4 to 11 described below.

[0069] [Variation 4] 20, the floating step 10F includes a top board riser structure 1F (hereinafter referred to as riser structure 1F), which includes a base material 2E and a cover material 5D. Like the floating step 10F, the riser structure 1F may not include a riser board T3.

[0070] [Variation 5] 21, the floating step 10G includes a top board kick-in structure 1G (hereinafter referred to as kick-in structure 1G), which includes a base material 2F and a cover material 5E. As with the floating step 10G, the cover material 5E may be configured with an engaging portion that can engage with the base material 2F without rotating it.

[0071] [Variation 6] 22, the floating step 10H includes a top board kick-in structure 1H (hereinafter referred to as kick-in structure 1H), which includes a base material 2G and a cover material 5F. The difference from variation 5 is that the base material 2G further includes a protruding piece and a holding portion capable of holding the cover material 5F.

[0072] [Variation 7] 23, the floating step 10I includes a top board kick-in structure 1I (hereinafter referred to as kick-in structure 1I), which includes a base material 2H and a cover material 5G. The difference from the second embodiment is that the base material 2H does not have a step portion 25.

[0073] [Variation 8] As shown in Figure 24, the floating step 10J has a tiled riser structure 1J (hereinafter referred to as riser structure 1J), which has a base material 2I. The difference from Variation 3 is that it does not have a reinforcing surface or a hollow portion, and like Variation 3, no cover material is required. Also, like Variation 4, it does not use a riser plate T3.

[0074] [Variation 9] 25, the floating step 10K includes a tiled riser structure 1K (hereinafter referred to as the riser structure 1K), which includes a base material 2J and a cover material 3B. As with the eighth modification, this configuration does not use a riser plate T3.

[0075] [Variation 10] 26, the floating step 10L includes a tile kick-in structure 1L (hereinafter referred to as kick-in structure 1L), which includes a base material 2K and a cover material 3C. As in Variation 6, in addition to the engagement portion, the base material 2K further includes a protruding piece and a holding portion that can hold the cover material 3C.

[0076] [Variation 11] 27, the floating step 10M includes a tiled riser structure 1M (hereinafter referred to as riser structure 1M), which includes a base material 2L and a cover material 3E. The difference from the first embodiment is that the base material 2L does not have a step portion 25, and the cover material 3E does not have a folded piece 31.

[0077] As described above, the floating step of the present disclosure can be configured using various riser structures, as in the first to eleventh variations. Furthermore, the floating step may be configured by combining the respective variations and embodiments. For example, the engagement grooves 41a and 41b provided in the base member 2 of the first embodiment can be used in the base member 2B of the first variation to attach the LED light source 4.

[0078] [Aspect 1] A riser structure provided on a staircase comprising a stair base and a tread whose nosing side protrudes downward from the riser side surface of the stair base, A base material is provided extending in the width direction of the staircase and supporting the underside of the protruding tread portion, The base material is A back part fixed to the riser side surface of the stair base; and an upper surface portion in contact with the lower surface of the protruding tread portion. [Aspect 2] The riser structure of aspect 1, wherein the base material has a hollow portion. [Aspect 3] The riser structure according to aspect 2, wherein the hollow portion is formed by the back surface portion, the top surface portion, and an inclined surface portion connecting the back surface portion and the top surface portion. [Aspect 4] The base member further includes a bottom surface portion extending downward from a lower portion of the rear surface portion, The riser structure according to aspect 1 or 2, wherein the bottom surface portion is adapted to engage a light source and to carry wiring for the light source. [Aspect 5] The riser structure further includes a cover material attached to a lower side of the base material, the base member has a first engaged portion at a lower end of the top surface portion and a second engaged portion at a lower end of the bottom surface portion, The kickback structure according to any one of aspects 1 to 4, wherein the cover material has a first engaging portion that engages with the first engaged portion and a second engaging portion that engages with the second engaged portion. [Aspect 6] the second engaged portion is configured to be able to hold the second engaging portion, The kick-in structure according to any one of aspects 1 to 5, wherein the cover material is configured to be rotatable around the second engaging portion held by the second engaged portion as a rotation axis. [Aspect 7] the base member further includes a step portion formed at a lower end of the upper surface portion and recessed downward, A kickback structure according to any one of aspects 1 to 6, wherein the cover material further has a vertical surface portion extending in an approximately vertical direction, and a folded piece formed at the upper end of the vertical surface portion extending in an approximately horizontal direction toward the upper side and positioned above the step portion. [Aspect 8] A kickback structure as described in aspect 7, wherein the cover material further includes a horizontal surface portion formed at the lower end of the vertical surface portion, extending approximately horizontally toward the lower side, and capable of holding finishing materials. [Aspect 9] The cover material has an inclined surface portion that inclines downward toward an upper stage, A kick-in structure according to any one of aspects 1 to 6, wherein a finishing material is provided on the surface of the lower section of the inclined surface portion. [Aspect 10] A base material used in the riser structure according to any one of aspects 1 to 9. [Aspect 11] A construction method for a riser structure according to any one of aspects 1 to 9, The second engaging portion of the cover material is engaged with and held in the second engaged portion of the base material, The cover material is rotated around the second engagement portion as a rotation axis, A method for constructing a riser structure, in which the cover material is attached and fixed to the base material by engaging the first engaging portion of the cover material with the first engaged portion of the base material. [Explanation of symbols]

[0079] CB Concrete Block (stage base), H1 Hollow part, T1 Bed plate (step board), 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K, 1L, 1M Footrest structure, 2, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2I, 2J, 2K, 2L Back material, 3, 3B, 3C, 3D, 5, 5B, 5C, 5D, 5E, 5F, 5G Back material, 4 LED light source (light source), 21 Upper part, 22 Back part, 23 Bottom part, 24 Slanted part, 25 Step part, 27 1st quilt part, 28 2nd quilt part, 31 Folding piece, 32 Vertical face, 33 horizontal face, 36 first joint, 37 second joint, 52 inclined face

Claims

1. A riser structure provided on a staircase comprising a stair base and a tread whose nosing side protrudes downward from the riser side surface of the stair base, A base material is provided extending in the width direction of the staircase and supporting the underside of the protruding tread portion, The base material is A back part fixed to the riser side surface of the stair base; and an upper surface portion in contact with the lower surface of the protruding tread portion.

2. The riser structure according to claim 1 , wherein the base material has a hollow portion.

3. 3. The riser structure according to claim 2, wherein the hollow portion is formed by the back surface portion, the top surface portion, and an inclined surface portion connecting the back surface portion and the top surface portion.

4. The base member further includes a bottom surface portion extending downward from a lower portion of the rear surface portion, The riser structure according to claim 1 , wherein a light source is secured to the bottom surface portion and wiring for the light source is placed on the bottom surface portion.

5. The riser structure further includes a cover material attached to a lower side of the base material, the base member has a first engaged portion at a lower end of the top surface portion and a second engaged portion at a lower end of the bottom surface portion, The riser structure according to claim 4 , wherein the cover material has a first engaging portion that engages with the first engaged portion and a second engaging portion that engages with the second engaged portion.

6. the second engaged portion is configured to be able to hold the second engaging portion, The kick-in structure according to claim 5 , wherein the cover material is configured to be rotatable around the second engaging portion held by the second engaged portion as a rotation axis.

7. the base member further includes a step portion formed at a lower end of the upper surface portion and recessed downward, The kick structure described in claim 5, wherein the cover material further has a vertical surface portion extending in an approximately vertical direction, and a folded piece formed at the upper end of the vertical surface portion extending in an approximately horizontal direction toward the upper step side and positioned above the step portion.

8. 8. The kickboard structure according to claim 7, wherein the cover material further comprises a horizontal surface portion formed at the lower end of the vertical surface portion and extending substantially horizontally toward the lower step side, and capable of holding a finishing material.

9. The cover material has an inclined surface portion that inclines downward toward an upper stage, The riser structure according to claim 5 , wherein a finishing material is provided on the surface of the lower step of the inclined surface portion.

10. A base material used in the riser structure according to any one of claims 1 to 9.

11. A construction method for the riser structure according to claim 6, The second engaging portion of the cover material is engaged with and held in the second engaged portion of the base material, The cover material is rotated around the second engaging portion as a rotation axis, A method for constructing a riser structure, in which the cover material is attached and fixed to the base material by engaging the first engaging portion of the cover material with the first engaged portion of the base material.

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