A prefabricated staircase for prefabricated buildings

Abstract

This utility model discloses a prefabricated staircase for prefabricated buildings, comprising several main body parts connected end-to-end and side fixing parts located on both sides of the main body parts. Each main body part includes a horizontal plate and vertical plates, which are vertically connected. The lower end of each vertical plate has two cross-shaped protrusions, and the upper surface of each horizontal plate has a matching cross-shaped groove. The side fixing parts include several side plates, each with a dovetail groove on both its upper and lower surfaces. The side plates are connected by upper and lower sliding rods, with the bottom of the upper sliding rod and the top of the lower sliding rod having protrusions that match the dovetail grooves. The surface of each side plate has a side fixing groove that matches the horizontal plate. After the side plates are installed, the ends of the horizontal plates are embedded in the side fixing grooves. This design is suitable for the high-efficiency construction requirements of prefabricated buildings.

Description

Technical Field

[0001] This article relates to a prefabricated staircase in prefabricated buildings. Background Technology

[0002] In the field of prefabricated buildings, stairs are a key component, and their installation method directly affects the project progress and construction cost. Current mainstream installation methods have significant technical bottlenecks: Firstly, traditional metal stairs use on-site welding, which, while relatively simple in process, easily leads to weld scars and deformation on the component surface, resulting in a rough appearance that fails to meet the refined decorative requirements of modern architecture. This deficiency is particularly pronounced in public buildings and commercial real estate, where aesthetic standards are high.

[0003] Secondly, although prefabricated staircases ensure component precision through factory production, their large overall size and weight require specialized large-scale transportation equipment for transport, resulting in low utilization of loading space. Furthermore, the hoisting process places stringent requirements on the tonnage of lifting equipment, further increasing construction costs.

[0004] Furthermore, both methods suffer from installation efficiency issues: welding requires on-site hot work, is significantly affected by environmental factors, and the process connections are time-consuming; overall hoisting is limited by the scheduling efficiency of transportation and hoisting equipment, making it difficult to meet the needs of rapid construction in prefabricated buildings. Therefore, developing a prefabricated staircase system that combines efficient installation, low-cost transportation, and a stable structure has become a pressing technical challenge for the industry. Utility Model Content

[0005] This utility model aims to provide a prefabricated staircase for prefabricated buildings, effectively solving the problems of slow installation speed and structural instability in existing installation structures. The specific solution is as follows:

[0006] A prefabricated staircase for an assembled building includes several main body parts connected end to end and side fixing parts located on both sides of the main body parts.

[0007] The main body includes a horizontal plate and a vertical plate, which are vertically connected. The lower end of the vertical plate has two cross-shaped protrusions, and the upper surface of the horizontal plate has a matching cross-shaped groove.

[0008] The side fixing part includes several side plates. The upper and lower surfaces of the side plates are provided with dovetail grooves. The several side plates are connected by an upper sliding rod and a lower sliding rod. The bottom of the upper sliding rod and the top of the lower sliding rod are both protruding structures that match the dovetail grooves.

[0009] The side plate has a side fixing groove that matches the horizontal plate. After the side plate is installed, the end of the horizontal plate is embedded in the side fixing groove. An inclined support plate is provided between the lower surface of the horizontal plate and the vertical plate.

[0010] For ease of use, the top of the upper slide bar is an arc structure, and the bottom of the lower slide bar is a flat structure.

[0011] To enhance the overall structural strength, the upper sliding rod and the lower sliding rod are both single, integral metal rods, the horizontal plate and the vertical plate are precast concrete components, and the two ends of the inclined support plate are fixed to the horizontal plate and the vertical plate respectively by pre-embedded bolts.

[0012] This structure uses a snap-fit ​​method, allowing for rapid on-site installation of prefabricated stairs. Furthermore, only the upper and lower sliding rods need to be transported as a whole; the rest can be disassembled and transported, significantly reducing transportation costs.

[0013] After assembly, it consists of a main body and side fixing parts, including:

[0014] Main body: It is composed of a horizontal plate and a vertical plate connected vertically. The lower end of the vertical plate has two cross-shaped protrusions, and the upper surface of the horizontal plate has a corresponding cross-shaped groove. The main body is connected segment by segment through the interlocking of the concave and convex parts. An inclined support plate is added between the lower surface of the horizontal plate and the vertical plate. Its two ends are fixed to the horizontal plate and the vertical plate by pre-embedded bolts to enhance the load-bearing stability.

[0015] Side fixing part: includes several side plates, with dovetail grooves on the upper and lower end surfaces of the side plates, which are connected to the lower sliding rod by a single integral metal upper sliding rod. The bottom of the upper sliding rod and the top of the lower sliding rod are provided with protruding structures that match the dovetail grooves, wherein the top of the upper sliding rod is an arc guide structure and the bottom of the lower sliding rod is a flat support structure; the surface of the side plate is provided with a side fixing groove that matches the end of the horizontal plate. When the horizontal plate is installed, it is embedded in the groove to form a lateral limit.

[0016] Beneficial effects:

[0017] This type of prefabricated staircase in prefabricated buildings achieves the connection of the main body through the cross-shaped concave-convex fit between the horizontal and vertical plates. The side plates are quickly assembled into a side fixed frame through the dovetail groove structure of the upper and lower sliding rods. The ends of the horizontal plates are embedded in the side plate fixing grooves and supplemented with inclined support plates to enhance stability.

[0018] This structural design enables modular disassembly and snap-fit ​​rapid installation of each component, which not only significantly improves the assembly efficiency on the construction site and reduces complex processes such as welding, but also reduces transportation costs through disassembly and transportation. At the same time, the use of inclined support plates enhances the overall load-bearing capacity, ensures structural stability, and meets the needs of prefabricated buildings for efficient construction, low-cost transportation, and reliable load-bearing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a prefabricated staircase installed in a prefabricated building.

[0020] Figure 2This is a side view of the installation of a prefabricated staircase in a prefabricated building.

[0021] Figure 3 This is a top view of the side structure;

[0022] Figure 4 This is a schematic diagram of a partial explosion between two adjacent main components;

[0023] Figure 5 This is a front-view view of the installation between two adjacent main components;

[0024] In the diagram: 1. Side plate, 11. Side fixing groove, 2. Upper sliding rod, 3. Lower sliding rod, 4. Horizontal plate, 5. Vertical plate, 6. Inclined support plate. Detailed Implementation

[0025] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0026] Example 1

[0027] like Figure 1-5 As shown, a prefabricated staircase for prefabricated buildings comprises a main body consisting of a horizontal plate 4 and vertical plates 5. The horizontal plate 4 and vertical plates 5 are vertically connected. The cross-shaped protrusion at the lower end of the vertical plate 5 matches the cross-shaped groove on the upper surface of the horizontal plate 4, achieving end-to-end connection of the main body. The side plate 1 of the side fixing part is connected by an upper sliding rod 2 and a lower sliding rod 3. The protruding structure at the bottom of the upper sliding rod 2 and the top of the lower sliding rod 3 matches the dovetail groove of the side plate 1, facilitating installation and disassembly. The end of the horizontal plate 4 is embedded in the side fixing groove 11 of the side plate 1. At the same time, an inclined support plate 6 is provided between the lower surface of the horizontal plate 4 and the vertical plate 5 to enhance structural stability.

[0028] In the actual installation process, the side panels 1 are first connected to form a side fixing frame via the upper sliding rod 2 and the lower sliding rod 3. Then, the ends of the horizontal plates 4 of the main body are embedded into the side fixing grooves 11. The main body is connected segment by segment using the cooperation of the cross-shaped protrusions and grooves, thus completing the assembly of the entire staircase. After the overall installation is completed, in order to improve the overall load-bearing capacity of the staircase, support columns can be installed at the bottom, with the top of the support columns abutting against the lower surface of the horizontal plates.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A prefabricated stair for a fabricated building, characterized in that, It includes several main body parts connected end to end and side fixing parts located on both sides of the main body parts; The main body includes a horizontal plate and a vertical plate, which are vertically connected. The lower end of the vertical plate has two cross-shaped protrusions, and the upper surface of the horizontal plate has a matching cross-shaped groove. The side fixing part includes several side plates. The upper and lower surfaces of the side plates are provided with dovetail grooves. The several side plates are connected by an upper sliding rod and a lower sliding rod. The bottom of the upper sliding rod and the top of the lower sliding rod are both protruding structures that match the dovetail grooves. The side plate has a side fixing groove on its surface that matches the horizontal plate. After the side plate is installed, the end of the horizontal plate is embedded in the side fixing groove.

2. The prefabricated stair of a fabricated building according to claim 1, characterized in that, An inclined support plate is provided between the lower surface of the horizontal plate and the vertical plate.

3. The prefabricated stair of a fabricated building according to claim 1, characterized in that, The top of the upper sliding rod is an arc structure, and the bottom of the lower sliding rod is a flat structure.

4. A prefabricated stair for a fabricated building according to any one of claims 1-3, characterized in that, Both the upper slide rod and the lower slide rod are single, integral metal rods.

5. The prefabricated stair of a fabricated building according to claim 4, characterized in that, The horizontal and vertical slabs are precast concrete components.

6. The prefabricated stair of a fabricated building according to claim 2, characterized in that, The two ends of the inclined support plate are fixed to the horizontal plate and the vertical plate respectively by pre-embedded bolts.

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