Combined stair

Abstract

The utility model discloses a combined stair and belongs to the technical field of concrete prefabricated parts. The prefabricated concrete stair solves the technical problems that an existing prefabricated concrete stair is large in size and limited by the space in a building, construction efficiency is low, and potential safety hazards exist. The left stairs and the right stairs are arranged left and right in pairs; an upper assembly hole is formed in the upper end of the left stair in a penetrating mode, a lower assembly hole is formed in the lower end of the left stair in a penetrating mode, and the left stair is installed with external stair beam bolts in a matched mode through the upper assembly hole and the lower assembly hole. Protruding blocks and grooves are formed in the side wall of the left stair in the inclined direction, and the multiple protruding blocks and the multiple grooves are alternately arranged. Protruding blocks and grooves are formed in the side wall of the right stair in the inclined direction, and the multiple protruding blocks and the multiple grooves are alternately arranged. The groove of the right stair side wall and the protruding block of the left stair side wall are matched to form a mortise and tenon joint structure, and the protruding block of the right stair side wall and the groove of the left stair side wall are matched to form a mortise and tenon joint structure. And the construction efficiency is improved. The precast concrete stair is used for precast concrete stairs.

Description

Technical Field

[0001] This utility model relates to a modular staircase, belonging to the technical field of precast concrete components. Background Technology

[0002] Compared to cast-in-place concrete, precast concrete components produced in factories offer numerous advantages: the relatively stable working environment in factories provides a higher safety factor compared to complex on-site operations; the quality and manufacturing process of building components can be better controlled through mechanized production; the standardization of precast component dimensions and characteristics significantly accelerates installation speed and construction progress; compared to traditional on-site molding, molds in factories can be reused, mechanized production requires less manual labor, and as labor costs continue to rise, the cost advantage of large-scale precast components will become increasingly apparent. The use of precast components significantly reduces on-site work at construction sites, resulting in a substantial reduction in dust and noise pollution.

[0003] Precast concrete staircases are prefabricated in the factory and then transported to the construction site. The precast concrete staircases are then assembled with the stair beams poured on site. In existing buildings, precast concrete staircases are hoisted for construction. However, when the volume of the precast concrete staircase is large, the transportation and assembly process will be limited by the space inside the building, which will cause inconvenience, affect construction efficiency, and create safety hazards.

[0004] In summary, existing precast concrete staircases suffer from technical problems such as low construction efficiency and safety hazards due to their large size and the limited space within the building. Utility Model Content

[0005] This invention aims to address the technical problems of existing precast concrete staircases, which suffer from low construction efficiency and safety hazards due to their large size and limited space within buildings, and thus provides a modular staircase.

[0006] The technical solution of this utility model is a combined staircase, which includes a left staircase and a right staircase, and the left staircase and the right staircase are arranged in pairs on the left and right sides;

[0007] The upper end of the left staircase has an upper assembly hole, and the lower end of the left staircase has a lower assembly hole. The left staircase is installed by connecting to the external stair beam bolts through the upper and lower assembly holes respectively. The side wall of the left staircase is provided with protrusions and grooves along the inclined direction, and several protrusions and grooves are arranged alternately.

[0008] The right staircase sidewall is provided with protrusions and grooves along the inclined direction, with several protrusions and grooves arranged alternately;

[0009] The groove on the right side wall of the staircase and the protrusion on the left side wall of the staircase fit together to form a mortise and tenon structure.

[0010] As another improvement of this utility model, the cross-sectional shape of the protrusions and grooves provided on the right stair sidewall and the right stair sidewall are both rectangular.

[0011] As another improvement of this utility model, both the left staircase and the right staircase include longitudinal ribs along the inclined direction and transverse ribs along the horizontal direction.

[0012] As another improvement of this utility model, the protrusion is provided with an elongated rib in the horizontal direction.

[0013] As another improvement of this utility model, the outer side of the extended rib is fitted with a stirrup.

[0014] As another improvement of this utility model, the outer sides of the upper and lower assembly holes are provided with hole edge reinforcing ribs in the horizontal direction, and the hole edge reinforcing ribs are arranged in two layers, upper and lower.

[0015] As another improvement of this utility model, lifting nuts are pre-embedded on the top surfaces of the left and right staircases.

[0016] As another improvement of this utility model, both the upper and lower assembly holes are filled with C40 type concrete.

[0017] As another improvement of this utility model, a filling layer is filled between the left staircase sidewall and the right staircase sidewall, and the material of the filling layer is polystyrene.

[0018] As another improvement of this utility model, anti-slip grooves are provided on the top surfaces of the left and right staircases.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model adopts a left staircase and a right staircase arranged in pairs. The left staircase is installed by engaging with the external stair beam bolts through the upper and lower assembly holes respectively. The right staircase is installed by engaging with the left staircase through the protrusion and groove. This reduces the building space required for transportation and installation. Compared with the existing prefabricated staircases with larger volume, it is more convenient to assemble and transport, and the space is more sufficient for workers to install, reducing safety hazards.

[0021] 2. In this utility model, the groove on the right side wall of a combined staircase and the protrusion on the left side wall of the staircase cooperate to form a mortise and tenon structure. During installation, the left staircase is first installed using ladder beam bolts. After the right staircase is hoisted to the left side wall of the staircase, it is pushed in horizontally. The right staircase is installed with the left staircase through the cooperation of the protrusion and groove, which effectively improves the installation accuracy. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of a modular staircase according to this utility model.

[0023] Figure 2 This is a top-view diagram of the left and right staircases assembled.

[0024] Figure 3 This is a rear view diagram of the left staircase.

[0025] Figure 4 This is a schematic diagram of the reinforcement details for the left staircase.

[0026] Figure 5 This is a front view diagram of the right staircase.

[0027] Figure 6 This is a schematic diagram of the reinforcement details for the right staircase. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the positional relationships indicated by terms such as "upper," "lower," "left," and "right" are only based on the positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the referred components have a specific orientation, or are constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Specific implementation method one: Combining Figures 1 to 6 This embodiment describes a combined staircase, which includes a left staircase 1 and a right staircase 2, arranged in pairs on the left and right sides.

[0030] The upper end of the left staircase 1 is provided with an upper assembly hole 3, and the lower end of the left staircase 1 is provided with a lower assembly hole 4. The left staircase 1 is installed by engaging with external stair beam bolts through the upper assembly hole 3 and the lower assembly hole 4 respectively. The side wall of the left staircase 1 is provided with protrusions 5 and grooves 6 along the inclined direction, and several protrusions 5 and grooves 6 are alternately arranged.

[0031] The right staircase 2 side wall is provided with protrusions 5 and grooves 6 along the inclined direction, and several protrusions 5 and grooves 6 are arranged alternately;

[0032] The groove 6 on the side wall of the right staircase 2 and the protrusion 5 on the side wall of the left staircase 1 cooperate to form a mortise and tenon structure.

[0033] The system uses a pair of left and right staircases arranged side by side. The left staircase is installed by engaging with the external stair beam bolts through the upper and lower assembly holes, while the right staircase is installed by engaging with the left staircase through protrusions and grooves. This reduces the building space required for transportation and installation. Compared with existing prefabricated staircases with larger volumes, assembly and transportation are more convenient, and workers have more space during installation, reducing safety hazards.

[0034] The left staircase is installed near the building wall. During installation, it is hoisted to the construction site. After applying mortar and waterproofing layers to the top surfaces of the upper and lower stair beams, the staircase is assembled. It is then fixed between the upper and lower stair beams using bolts for positioning. Pre-existing construction joints are flexibly filled, and the assembly holes are fixed and filled. The right staircase is hoisted to the side wall of the left staircase and pushed in horizontally. Before pushing it in, concrete of the same strength as the staircase can be poured into the groove to enhance the overall structural stability. The right staircase is installed with the left staircase via protrusions and grooves, forming a mortise and tenon structure, which enhances the overall stability of this embodiment and effectively improves installation accuracy.

[0035] Specific Implementation Method Two: Combining Figures 1 to 6 This embodiment differs from specific embodiment one in that the protrusions 5 and grooves 6 on the side walls of staircase 2 and the right staircase 2 are both rectangular in cross-sectional shape. The rectangular shape facilitates processing and installation. Other components and connection methods are the same as in specific embodiment one.

[0036] Specific implementation method three: Combining Figures 1 to 6 This embodiment differs from specific embodiment one in that both the left staircase 1 and the right staircase 2 include longitudinal reinforcement 7 along the inclined direction and transverse reinforcement 8 along the horizontal direction. Other components and connection methods are the same as in specific embodiment one or two.

[0037] Specific implementation method four: Combination Figures 1 to 6 This embodiment differs from specific embodiment one in that the protrusion 5 is provided with an elongated rib 9 along the horizontal direction. This design enhances the strength of the protrusion, resulting in a higher overall strength after forming a mortise and tenon structure with the groove. Other components and connection methods are the same as any one of specific embodiments one to three.

[0038] Specific Implementation Method Five: Combining Figures 1 to 6 This embodiment differs from specific embodiment one in that the outer side of the elongating rib 9 is fitted with a stirrup 10. This design enhances the strength of the protrusion, resulting in a higher overall strength after forming a mortise and tenon structure with the groove. Other components and connection methods are the same as any one of specific embodiments one through four.

[0039] Specific Implementation Method Six: Combination Figures 1 to 6This embodiment differs from specific embodiment one in that reinforcing ribs 11 are arranged horizontally on the outer sides of the upper assembly hole 3 and the lower assembly hole 4, with the reinforcing ribs 11 arranged in two layers. This improves the strength of the assembly hole structure of the left staircase, enhances its structural stability, and reduces the likelihood of damage during assembly. Other components and connection methods are the same as any one of specific embodiments one to five.

[0040] Specific implementation method seven: Combination Figures 1 to 6 This embodiment differs from specific embodiment one in that lifting nuts are pre-embedded on the top surfaces of the left staircase 1 and the right staircase 2. This design facilitates lifting. Other components and connection methods are the same as any one of specific embodiments one through six.

[0041] Specific implementation method eight: Combination Figures 1 to 6 This embodiment differs from specific embodiment one in that both the upper assembly hole 3 and the lower assembly hole 4 are filled with C40 grade concrete. This design aims to improve the overall structural strength. Other components and connection methods are the same as any one of specific embodiments one through seven.

[0042] Specific Implementation Method Nine: Combining Figures 1 to 6 This embodiment differs from specific embodiment one in that a filling layer made of polystyrene is used to fill the gap between the left staircase 1 side wall and the right staircase 2 side wall. Other components and connection methods are the same as any one of specific embodiments one through eight.

[0043] Specific Implementation Method Ten: Combining Figures 1 to 6 This embodiment differs from Specific Embodiment 1 in that the top surfaces of the left staircase 1 and the right staircase 2 are provided with anti-slip grooves 12. Other components and connection methods are the same as any one of Specific Embodiments 1 to 9.

[0044] Combination Figures 1 to 6 Explanation of the working principle of this utility model:

[0045] The left staircase is installed near the building wall. During installation, it is hoisted to the construction site. After applying mortar and waterproofing layers to the top surfaces of the upper and lower stair beams, the staircase is assembled. It is then fixed between the upper and lower stair beams using bolts for positioning. Pre-existing construction joints are flexibly filled, and the assembly holes are fixed and filled. The right staircase is hoisted to the side wall of the left staircase and pushed in horizontally. Before pushing it in, concrete of the same strength as the staircase can be poured into the groove to enhance the overall structural stability. The right staircase is installed with the left staircase via protrusions and grooves, forming a mortise and tenon structure, which enhances the overall stability of this embodiment and effectively improves installation accuracy.

[0046] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A modular stairway characterized by It includes left stair (1) and right stair (2), left stair (1) and right stair (2) are arranged in pairs left and right; The upper end of left stair (1) is provided with an upper assembly hole (3), and the lower end of left stair (1) is provided with a lower assembly hole (4), left stair (1) is bolted and installed with external ladder beam through upper assembly hole (3) and lower assembly hole (4) respectively;The side wall of left stair (1) is provided with protrusions (5) and grooves (6) along the inclined direction, and a plurality of protrusions (5) and grooves (6) are alternately arranged; The side wall of right stair (2) is provided with protrusions (5) and grooves (6) along the inclined direction, and a plurality of protrusions (5) and grooves (6) are alternately arranged; The groove (6) of the side wall of right stair (2) and the protrusion (5) of the side wall of left stair (1) cooperate to form a mortise and tenon structure, and the protrusion (5) of the side wall of right stair (2) and the groove (6) of the side wall of left stair (1) cooperate to form a mortise and tenon structure.

2. A modular stair according to claim 1, wherein, The cross-sectional shape of the protrusion (5) and the groove (6) arranged on the side wall of right stair (2) is rectangular.

3. The modular stair of claim 1, wherein, Left stair (1) and right stair (2) both include longitudinal reinforcement (7) along the inclined direction and transverse reinforcement (8) along the horizontal direction.

4. A modular stair according to claim 3, wherein, The position of protrusion (5) is provided with lengthening rib (9) along the horizontal direction.

5. A modular stair according to claim 4, wherein, The outer side of lengthening rib (9) is sleeved with stirrup (10).

6. The modular stair of claim 1, wherein, The outer side of upper assembly hole (3) and lower assembly hole (4) is arranged with hole edge reinforcing rib (11) along the horizontal direction, and the hole edge reinforcing rib (11) is arranged in two layers.

7. The modular stair of claim 1, wherein, Hoisting nuts are pre-buried on the top surface of left stair (1) and right stair (2).

8. The modular stair of claim 1, wherein, C40 type concrete is filled in upper assembly hole (3) and lower assembly hole (4).

9. The modular stair of claim 1, wherein, A filling layer is filled between the side wall of left stair (1) and the side wall of right stair (2), and the material of the filling layer is polystyrene.

10. The modular stair of claim 1, wherein, Anti-skid grooves (12) are arranged on the top surface of left stair (1) and right stair (2).

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