A seamless rotating staircase

Abstract

The utility model relates to the field of building structure, specifically disclose a seamless rotating stair, it includes: respectively along preset spiral path extension's left structure ladder beam and right structure ladder beam, connect in multiple trapezoidal galvanized square steel frame between two ladder beams, set up multiple step structure on the frame to and be located at two ladder beam outside the enclosure structure. Among them, the step structure includes step hanger, horizontal decorative board, lamp strip and front stop decorative board, step hanger is welded on square steel frame, front stop decorative board is hung through the hook of step hanger front side and is fixed with step hanger through the adhesion layer, realizes traceless installation, the front side of horizontal decorative board is equipped with the integrated bending structure, and the structure and front stop decorative board between jointly define a hidden type installation groove for accommodating lamp strip. The utility model through ingenious structure design has realized the seamless appearance of stair and integrated type hidden lighting.

Description

Technical Field

[0001] This utility model relates to the field of building structures, and in particular to a seamless spiral staircase. Background Technology

[0002] As an important transportation facility connecting different floors in a building, staircases are increasingly being designed and constructed with a focus on aesthetics and creating a sense of space, while also fulfilling basic functional requirements. In modern architectural design, especially in commercial spaces, villas, and duplexes, spiral staircases are highly favored due to their elegant shapes, smooth lines, and space-saving features.

[0003] Traditional spiral staircases typically come in two structural types: central column and double-beam spiral. Central column spiral staircases have their treads cantilevered and fixed to a central column. While relatively simple, their load-bearing capacity and stability are slightly insufficient, and they may wobble when walking on them. Double-beam spiral staircases, on the other hand, use two spiral beams, one inside and one outside, as the main load-bearing structure. The treads are fixed between the beams, resulting in a more stable and safer overall structure, making it the most widely used type. In the construction of a double-beam spiral staircase, the beams are usually made of steel plates or structural steel, precisely calculated and machined to form a spiral shape. The treads typically consist of a base frame and decorative panels. The base frame, such as a steel frame, is welded or bolted between the two side beams to ensure structural rigidity. Decorative treads are then laid on the base frame, made of materials such as wood, stone, or metal, to achieve the desired design effect. To enhance the overall integrity and aesthetics of the staircase, designers often strive for a "seamless" visual effect, concealing connectors and structural gaps as much as possible. Furthermore, to enhance the ambiance and safety of staircases, integrated lighting systems have become a crucial component of staircase design. The conventional approach is to install wall lamps on the side walls of the staircase or recessed lights on the ceiling. Some designs also attempt to integrate the light source directly into the staircase structure, such as by installing light strips under the handrail or on the sides of the treads. However, existing light strip installation methods often require additional grooves or components to be added to the tread structure. This not only increases construction complexity but may also disrupt the overall aesthetics and simplicity of the tread structure, making it difficult to achieve concealed installation and uniform light distribution, ultimately affecting the final aesthetic effect.

[0004] Therefore, how to optimize the construction of the steps while ensuring the structural stability and safety of the spiral staircase, so that it can achieve a perfect seamless visual effect and cleverly integrate a concealed lighting system, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of existing technologies and to propose a seamless spiral staircase. To achieve the above objective, the embodiments of this utility model adopt the following technical solution:

[0006] This utility model embodiment proposes a seamless spiral staircase, comprising:

[0007] The left and right structural ladder beams extend along a preset spiral path respectively, multiple trapezoidal galvanized square steel frames connect the left and right structural ladder beams, multiple step structures are set corresponding to the trapezoidal galvanized square steel frames, and enclosure structures are set on the outside of the left and right structural ladder beams respectively.

[0008] The step structure includes step brackets, horizontal decorative panels, light strips, and front decorative panels. The step brackets are welded to a trapezoidal galvanized square steel frame. Hooks are provided on the front side of the step brackets. The front decorative panels are connected to the step brackets via the hooks and fixed to the step brackets by adhesive. The horizontal decorative panels are fixed to the trapezoidal galvanized square steel frame, and the front side of the horizontal decorative panels is provided with a bending structure. An installation groove is formed between the bending structure and the front decorative panels, and the light strips are placed in the installation groove.

[0009] Preferably, the enclosure structure includes an upper enclosure structure and a lower decorative enclosure, which are respectively connected to the left structural ladder beam or the right structural ladder beam.

[0010] The upper enclosure structure is equipped with a handrail connector, which is inverted L-shaped. One end of the handrail connector is threaded to the upper enclosure structure, and the other end away from the upper enclosure structure is fitted with a wooden handrail.

[0011] Preferably, the chamfer of the handrail connector has an arc segment, and the cross-section of the handrail connector is circular.

[0012] Preferably, in the same vertical direction,

[0013] The height of the upper enclosure structure is greater than the height of the wooden handrail; both the upper enclosure structure and the lower decorative enclosure are covered with a layer of metallic paint.

[0014] Preferably, it also includes a bottom decorative panel, the left and right sides of which are connected to the lower decorative barriers corresponding to the left and right structural ladder beams, respectively, and the upper and lower sides of the bottom decorative panel extend along the upper and lower directions of the left and right structural ladder beams.

[0015] Preferably, it also includes multiple sets of supporting beams, with both ends of the supporting beams connected to the lower decorative enclosures set on the left and right structural ladder beams, respectively, and the middle part of the bottom decorative panel connected to the supporting beams through fasteners.

[0016] Preferably, it also includes a top enclosure structure that is connected to the upper enclosure structure respectively provided on the left structural ladder beam or the right structural ladder beam, and the far end of the top enclosure structure is connected to the top edge wall.

[0017] Preferably, a reserved groove is provided between the horizontal decorative panel and / or the front windshield decorative panel and the upper enclosure structure.

[0018] Beneficial effects:

[0019] This utility model provides a seamless spiral staircase that cleverly solves the technical problems of existing spiral staircases in pursuing aesthetic integrity and functional integration, such as structural complexity, exposed gaps, and difficulties in installing light strips, through an innovative integrated design of the tread structure. Compared with existing technologies, this solution uses unique tread hangers and a dual fixing method of hooks and adhesive layers to install the front decorative panel, avoiding the traces left on the surface by traditional bolts or welding connections, achieving a truly "seamless" visual effect. More importantly, this solution integrates a bending structure on the front side of the horizontal decorative panel, naturally forming a hidden mounting groove with the front decorative panel, specifically for accommodating the light strip. This design not only perfectly integrates the lighting system into the tread structure, achieving the lighting aesthetic of "seeing the light but not the lamp," but also greatly simplifies the installation and maintenance process of the light strip. This ingenious structural design integrates decoration, fixing, and function, not only enhancing the overall aesthetics and artistry of the staircase but also optimizing the construction process and enhancing the stability and integrity of the structure. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 This is a cross-sectional view of the seamless spiral staircase proposed in this embodiment;

[0022] Figure 2 This is a partial enlarged view (A) of the seamless spiral staircase proposed in this embodiment;

[0023] Figure 3 This is a partial enlarged view (B) of the seamless spiral staircase proposed in this embodiment;

[0024] Figure 4 This is a partial enlarged view (C) of the seamless spiral staircase proposed in this embodiment;

[0025] Figure 5 A cross-sectional view of the seamless spiral staircase presented in this embodiment;

[0026] Figure 6 This is a partial D-enlarged view of the seamless spiral staircase proposed in this embodiment;

[0027] Figure 7 This is a plan view of the seamless spiral staircase proposed in this embodiment;

[0028] Figure 8 This is an elevation view of the top of the seamless spiral staircase proposed in this embodiment;

[0029] Figure 9 This is a rendering of the top of the seamless spiral staircase proposed in this embodiment.

[0030] Icons: 10 - Seamless spiral staircase; 110 - Left structural stair beam; 120 - Right structural stair beam; 130 - Trapezoidal galvanized square steel frame; 140 - Step structure; 150 - Enclosure structure; 141 - Step hanger; 142 - Horizontal decorative panel; 143 - Light strip; 144 - Front decorative panel; 1411 - Hook; 145 - Adhesive layer; 146 - Cement mortar layer; 1421 - Bending structure; 147 - Mounting groove; 151 - Upper enclosure structure; 152 - Lower decorative enclosure; 1511 - Handrail connector; 1512 - Wooden handrail; 153 - Metallic paint layer; 160 - Bottom decorative panel; 170 - Support beam; 161 - Fixture; 180 - Top enclosure structure; 20 - Top edge wall; 148 - Reserved groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail and completely below with reference to the accompanying drawings. It should be noted that the embodiments described herein are only some examples of this utility model, and not all of them. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. It should be stated that the description of these embodiments is intended to help understand this utility model, but does not constitute a limitation thereof.

[0032] In the following description, all terms indicating orientation or positional relationships, such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," are based on the relative relationships shown in the accompanying drawings. The use of these terms is merely for simplification and to enhance understanding, and is not intended to indicate or imply that the device or element referred to must have or follow a specific spatial orientation in its construction and operation. Therefore, they should not be construed as any limitation on the scope of protection of this utility model.

[0033] Example

[0034] This embodiment discloses a technical solution for a seamless spiral staircase. Please refer to the specific structure. Figures 1 to 9 ,in, Figure 1 and Figure 5 This is a sectional view of the staircase in this embodiment; Figure 2 , Figure 3 , Figure 4 , Figure 6 These are enlarged structural diagrams of parts A, B, C, and D of the staircase, respectively. Figure 7 This is a floor plan of the staircase. Figure 8 This is the elevation drawing of the top of the staircase. Figure 9 This is a 3D rendering of the top of the staircase. (Refer to...) Figure 1 , Figure 5 and Figure 7 This embodiment provides a seamless spiral staircase 10, whose overall structure presents a spiral ascent. This design aims to provide a staircase system that integrates structural stability, functional integration, and high aesthetic value. The core load-bearing components of the staircase 10 consist of a left structural stair beam 110 and a right structural stair beam 120, respectively arranged along a preset spiral path. The left and right structural stair beams 110 and 120 are typically made of high-strength steel plates, cut, bent, and welded according to precise calculations to form a highly rigid box-shaped or plate-like structure. Their key geometric parameters, such as spiral curvature and rise angle, are customized according to the specific floor height and spatial layout of the building. During installation, the bottoms of the left and right structural stair beams 110 and 120 are firmly anchored to the building's ground foundation structure, while their tops are reliably connected to the upper floor slab or beams, thus providing solid and stable structural support for the entire staircase system.

[0035] Between the left structural ladder beam 110 and the right structural ladder beam 120, multiple trapezoidal galvanized square steel frames 130 are arranged. Figure 7 As can be seen from the plan view, given the rotating characteristics of the staircase, the widths of the inner and outer sides of each step are different. Therefore, the trapezoidal galvanized square steel frame 130 supporting each step is also designed in a trapezoidal shape to precisely match the geometry of the steps. This trapezoidal galvanized square steel frame 130 is preferably constructed by welding galvanized square steel. The galvanizing process significantly improves its corrosion resistance, thereby ensuring the long-term durability of the staircase structure. Each trapezoidal galvanized square steel frame 130 is securely connected to the inner side of the left structural ladder beam 110 and the right structural ladder beam 120 through a high-strength welding process, together forming the direct load-bearing platform for each step, responsible for evenly and effectively transferring the load acting on the steps to the main ladder beam structure.

[0036] At the top of each trapezoidal galvanized square steel frame 130, a specially constructed step structure 140 is provided. Meanwhile, enclosure structures 150 are installed on the outer sides of the left structural ladder beam 110 and the right structural ladder beam 120, respectively. These enclosure structures 150 not only serve a safety protection function but are also a key component in achieving a seamless visual effect for the entire staircase.

[0037] The following section will focus on the core technical feature of this embodiment, namely the special construction of the step structure 140. Please refer to the following for details. Figure 5 and Figure 6 Each step structure 140 is composed of components such as step hanger 141, horizontal decorative panel 142, light strip 143, and front windshield decorative panel 144. The assembly process and structural relationships are described below:

[0038] First, the prefabricated step bracket 141 is fixed to the trapezoidal galvanized square steel frame 130 by welding. The step bracket 141 is generally an L-shaped metal component; its horizontal flange provides a supporting base for the subsequent installation of the horizontal decorative panel 142, while its vertical flange is used to install the front windshield decorative panel 144. At least one hook 1411 is pre-installed on the front side of the step bracket 141, i.e., on its vertical surface. The configuration of this hook 1411 is one of the important technical means to achieve traceless installation of the front windshield decorative panel 144.

[0039] Next, the decorative panels are installed. The horizontal decorative panel 142, as the surface directly stepped on by the user, can be made of stone, solid wood, or composite materials. During installation, a layer of cement mortar 146 is first laid on the surface of the trapezoidal galvanized square steel frame 130, and then the horizontal decorative panel 142 is laid on top of it. This cement mortar layer 146 securely fixes the horizontal decorative panel 142 to the trapezoidal galvanized square steel frame 130. This cement mortar layer 146 not only serves as an adhesive and fixing layer but can also be used for precise fine-tuning of the levelness of each step, ensuring the uniformity and flatness of all step surfaces. The front decorative panel 144, the vertical surface of the step, is installed using a special concealed connection. During installation, the back of the front decorative panel 144 is aligned with the hook 1411 on the step hanger 141 and hooked. The hook 1411 provides temporary positioning and initial support for the front decorative panel 144, thus simplifying the installation process. Subsequently, an adhesive material, such as high-strength structural adhesive or epoxy resin, is injected or coated into the gap between the vertical surface of the step hanger 141 and the back of the front trim panel 144 to form an adhesive layer 145. Through the physical positioning of the hook 1411 and the chemical curing of the adhesive layer 145, the front trim panel 144 is firmly fixed to the step hanger 141. This installation method, combining physical hooking and chemical bonding, completely avoids the use of any screws or connectors on the visible surface of the trim panel, resulting in a smooth transition between the vertical and horizontal surfaces of the step, without any visible structural gaps or breaks, thus achieving a highly seamless visual effect.

[0040] Finally, there is the integration of the lighting system. To achieve recessed lighting, this solution integrates a downward-bending structure 1421 on the front edge of the horizontal decorative panel 142. Once the horizontal decorative panel 142 and the front decorative panel 144 are installed, a pre-defined mounting groove 147 is naturally defined between the lower edge of the bending structure 1421 and the upper edge of the front decorative panel 144. The geometry of this mounting groove 147 is precisely designed to accommodate a standard LED light strip 143. Placing the light strip 143 inside the mounting groove 147, thanks to the concealed design of the groove, the light source is completely hidden, achieving a concealed light source and uniform downward diffusion of light. The light softly illuminates the tread of the next step from below the corner of the step, providing necessary safety lighting for nighttime passage and creating a layered and floating spatial light and shadow effect, significantly enhancing the overall design taste and architectural aesthetic value of the staircase.

[0041] To further improve the overall function and aesthetics of the staircase, this embodiment also includes a series of preferred technical solutions.

[0042] Please see Figure 1 and Figure 2 As a preferred embodiment, the enclosure structure 150 specifically includes an upper enclosure structure 151 and a lower decorative enclosure 152. Both are typically made of steel plates and are fixed to the outer sides of the left structural ladder beam 110 and the right structural ladder beam 120 respectively by welding, jointly creating a continuous, smooth, strip-like shape on the outer side of the staircase. The upper enclosure structure 151, with its greater height, forms the main body of the staircase railing and provides safety protection. The lower decorative enclosure 152 is used to enclose the internal structure of the lower part of the staircase, making its appearance more complete and unified. To improve the user's grip convenience, a handrail connector 1511 is provided on the upper enclosure structure 151, through which a wooden handrail 1512 is installed. The handrail connector 1511 is designed in an inverted L-shape, with external threads on its vertical section, allowing it to be threaded into the pre-drilled internal threaded holes of the upper enclosure structure 151, thus ensuring the firmness and convenience of installation. Its horizontally extended section supports and secures the wooden handrail 1512. The introduction of the 1512 wooden handrail provides a warm, wood-like feel within easy reach of the staircase, which is mainly composed of metal components, thus enhancing the comfort of use.

[0043] Furthermore, to enhance safety and comfort, the L-shaped corner of the handrail connector 1511 is preferably rounded to avoid potential safety hazards caused by sharp edges. Additionally, the cross-section of the handrail connector 1511 is preferably circular, which is simple in shape and more ergonomically designed for comfortable grip.

[0044] In terms of handling details, such as Figure 2As shown, on the same vertical section, the top surface of the upper enclosure structure 151 is designed to be slightly higher than the height of the wooden handrail 1512. This design visually creates a clear hierarchical relationship and provides a certain lateral restraint for the handrail, preventing excessive displacement when subjected to lateral impact. To give the entire enclosure structure 150 a unified and high-end surface texture, the outer surfaces of both the upper enclosure structure 151 and the lower decorative enclosure 152 are covered with a metallic paint layer 153. This paint layer undergoes multiple fine spraying and baking processes to form a uniform, delicate, and glossy finish, combining aesthetic value with excellent weather resistance and wear resistance.

[0045] Please see Figure 1 and Figure 4 To ensure a seamless and complete appearance on the bottom surface of the staircase, this embodiment preferably includes a decorative panel 160. This panel is relatively large, and its left and right sides are connected to the lower decorative railings 152 corresponding to the left structural beam 110 and right structural beam 120, respectively, via concealed connectors (such as corner brackets or buckles). Its upper and lower sides extend along the spiral path of the beams, completely concealing all internal structures at the bottom of the staircase (including the bottom surface of the trapezoidal galvanized square steel frame 130), forming a smooth, continuous curved surface. This ensures the staircase presents a perfect, integrated design from all viewing angles.

[0046] Considering that the large-span bottom decorative panel 160 may flex or creak due to its own weight or vibration, this embodiment preferably adds multiple sets of supporting beams 170. The two ends of these supporting beams 170 are respectively fixed between the lower decorative retaining walls 152 of the left structural stair beam 110 and the right structural stair beam 120, providing multiple intermediate support points for the bottom decorative panel 160. The central area of ​​the bottom decorative panel 160 is connected to these supporting beams 170 via fasteners 161. The fasteners 161 can be bolts, clips, or dedicated connectors, and their function is to tightly connect the panel to the beams, effectively suppressing sagging deformation of the panel, thereby ensuring the long-term flatness and structural stability of the staircase bottom surface.

[0047] Please see Figure 8 To achieve a seamless transition between the staircase and the upper floor slab, this embodiment preferably includes a top retaining structure 180 connected to the upper retaining structure 151. This top retaining structure 180 can be considered a functional extension of the upper retaining structure 151 at the top of the staircase, with its distal end integrated with the top edge wall 20 (i.e., the side wall of the floor slab opening). This design ensures that the stair railing smoothly transitions into a safety barrier for the floor upon reaching the upper level, guaranteeing the safety of the floor slab opening edge while maintaining design continuity and overall aesthetics.

[0048] Finally, please see Figure 3This is a preferred solution that embodies refined design. At the junction of the horizontal decorative panel 142 and / or the front decorative panel 144 and the upper enclosure structure 151, a small pre-reserved groove 148 is preferably provided. This pre-reserved groove 148 has multiple functions: firstly, it acts as a buffer zone for construction tolerances, mitigating minor dimensional deviations that occur during the cutting and installation of the decorative panels; secondly, it acts as an expansion joint between different materials, accommodating varying degrees of expansion and contraction due to changes in temperature and humidity, preventing mutual compression and damage between materials; thirdly, visually, the groove forms a clear shadow line, differentiating the steps from the side enclosure, thereby enhancing the overall sense of layering and refinement.

[0049] In summary, the seamless spiral staircase 10 of this embodiment, through a series of optimized designs at the structural and technological levels, especially its unique step structure 140, effectively integrates multiple functions such as load-bearing, decoration, and lighting, while achieving a high degree of integrity and seamlessness in appearance. Thus, it provides a high-quality staircase solution for modern architectural spaces that takes into account both functional needs and aesthetic expression.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications or variations can be made to the present utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seamless revolving staircase, characterized in that, include: The left and right structural ladder beams extend along a preset spiral path, a plurality of trapezoidal galvanized square steel frames are connected between the left and right structural ladder beams, a plurality of step structures are provided corresponding to the trapezoidal galvanized square steel frames, and a enclosure structure is provided on the outside of the left and right structural ladder beams respectively. The step structure includes a step bracket, a horizontal decorative panel, a light strip, and a front decorative panel. The step bracket is welded to the trapezoidal galvanized square steel frame. A hook is provided on the front side of the step bracket, and the front decorative panel is connected to the step bracket through the hook and fixed to the step bracket by adhesive. The horizontal decorative panel is fixed on the trapezoidal galvanized square steel frame, and a bending structure is provided on the front side of the horizontal decorative panel. The bending structure and the front decorative panel form an installation groove, and the light strip is located in the installation groove.

2. The seamless rotating stair of claim 1, wherein, The enclosure structure includes an upper enclosure structure and a lower decorative enclosure, wherein the upper enclosure structure and the lower decorative enclosure are respectively connected to the left structural ladder beam or the right structural ladder beam. The upper enclosure structure is provided with a handrail connector, which is inverted L-shaped. One end of the handrail connector is threaded to the upper enclosure structure, and the other end away from the upper enclosure structure is fitted with a wooden handrail.

3. The seamless rotating stair of claim 2, wherein, The chamfered corner of the handrail connector is provided with an arc segment, and the cross-section of the handrail connector is circular.

4. The seamless spiral staircase according to claim 2, characterized in that, In the same vertical direction, The height of the upper enclosure structure is greater than the height of the wooden handrail; both the upper enclosure structure and the lower decorative enclosure are covered with a layer of metallic paint.

5. The seamless spiral staircase according to claim 2, characterized in that, It also includes a bottom decorative panel, the left and right sides of which are respectively connected to the lower decorative enclosures provided on the left and right structural ladder beams, and the upper and lower sides of the bottom decorative panel extend along the upper and lower directions of the left and right structural ladder beams.

6. The seamless spiral staircase according to claim 5, characterized in that, It also includes multiple sets of supporting beams, the two ends of which are connected to the lower decorative enclosures set on the left and right structural ladder beams, respectively, and the middle part of the bottom decorative panel is connected to the supporting beams through fasteners.

7. The seamless spiral staircase according to claim 2, characterized in that, It also includes a top enclosure structure that is connected to the upper enclosure structure respectively set on the left structural ladder beam or the right structural ladder beam, and the far end of the top enclosure structure is connected to the top edge wall.

8. The seamless spiral staircase according to claim 2, characterized in that, A pre-reserved groove is provided between the horizontal decorative panel and / or the front decorative panel and the upper enclosure structure.

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