A prefabricated staircase

Abstract

This utility model relates to the field of prefabricated buildings, specifically to a prefabricated staircase. The prefabricated staircase includes: a staircase body with a first bolt hole and a second bolt hole; a connector adapted to be placed between the staircase body and a connecting platform; a first clearance hole matching the first bolt hole on the connector, and a connecting bolt matching the second bolt hole on the connector; and a trapezoidal toothed groove formed on the side of the connector facing away from the staircase body. This utility model, by providing a connector between the staircase body and the connecting platform, allows the staircase body to be installed on the connecting platform even after bolt misalignment, ensuring the connection stability between the staircase body and the connecting platform.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated buildings, and specifically to a prefabricated staircase. Background Technology

[0002] With the development of the construction industry, prefabricated buildings have gained widespread acceptance. Prefabricated construction transfers a large amount of on-site work from traditional construction methods to factories, where building components and accessories are prefabricated, transported to the construction site, and assembled on-site using reliable connection methods. Prefabricated staircases are one commonly used type of prefabricated building.

[0003] In the construction of prefabricated stairs, leveling is typically achieved using shims, followed by aligning the bolt holes on the stairs with the bolts on the connecting platform, and finally, grouting is injected into the bolt holes to secure the stairs to the connecting platform. However, in actual construction, misalignment of the pre-embedded bolts frequently occurs, resulting in the pre-embedded bolts not aligning with the bolt holes on the stairs, thus affecting the assembly of the stairs.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem of mismatch between stair bolt holes and pre-embedded bolts in existing technology, this utility model provides a prefabricated staircase. The prefabricated staircase includes: a staircase body with a first bolt hole and a second bolt hole; a connector adapted to be placed between the staircase body and a connecting platform; a first clearance hole matching the first bolt hole on the connector, and a connecting bolt matching the second bolt hole on the connector; and a trapezoidal toothed groove formed on the side of the connector opposite to the staircase body.

[0006] This utility model discloses a prefabricated staircase, comprising a staircase body and a connector. The connector is positioned between the staircase body and a connecting platform, facilitating the elevation and leveling of the staircase body during installation. The bolts on the connecting platform are cut off after installation to allow for the installation of the connector. A first clearance hole is provided on the connector, corresponding to the first bolt hole of the staircase body and mating with the bolts on the connecting platform, facilitating the positioning and fixing of the staircase body. A connecting bolt is provided on the connector, mating with the second bolt hole of the staircase body, enabling the positioning and fixing of the staircase body after the connector is fixed to the connecting platform. A trapezoidal toothed groove is formed on the side of the connector facing away from the staircase body to reduce the shear stress on the bolts on the connecting platform. Through the above-described design, this utility model discloses a prefabricated staircase with a connector between the staircase body and the connecting platform, allowing the staircase body to be installed on the connecting platform even after bolt misalignment, ensuring the connection stability between the staircase body and the connecting platform.

[0007] Furthermore, a second clearance hole is provided on the connector to mate with the bolts of the connecting platform. With the above-described arrangement, the second clearance hole allows the bolts on the connecting platform to pass through, and the connection strength between the connector and the connecting platform can be enhanced by grouting.

[0008] Furthermore, a fixing plate is provided on the connector, and the fixing plate is arranged perpendicular to the connector.

[0009] Furthermore, a connector bolt is provided on the fixing plate.

[0010] Furthermore, the connecting bolts are welded to the connecting member.

[0011] Furthermore, handrail holes are provided on the main body of the staircase.

[0012] In summary, compared with the prior art, this utility model has the following beneficial effects:

[0013] The connector is positioned between the main body of the staircase and the connecting platform to facilitate the raising and leveling of the main body of the staircase during installation. The first clearance hole corresponds to the first bolt hole of the main body of the staircase, and both are matched with the bolts on the connecting platform to facilitate the positioning and fixing of the main body of the staircase. The connecting bolt matches the second bolt hole of the main body of the staircase, enabling the positioning and fixing of the main body of the staircase after the connector is fixed to the connecting platform. Attached Figure Description

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0015] Figure 1 This is a schematic diagram of an embodiment of a prefabricated staircase according to the present invention.

[0016] List of reference numerals in the attached diagram: 1. Staircase body; 11. Step; 12. Upper fixing block; 13. Lower fixing block; 14. First bolt hole; 15. Second bolt hole; 16. Handrail hole; 2. Connector; 21. First clearance hole; 22. Second clearance hole; 23. Connecting bolt; 24. Trapezoidal toothed groove; 25. Fixing plate; 26. Insert bolt. Detailed Implementation

[0017] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] To improve or solve the technical problem of mismatch between stair bolt holes and pre-embedded bolts in existing technology, this utility model provides a prefabricated staircase. The prefabricated staircase includes: a staircase body 1, on which a first bolt hole 14 and a second bolt hole 15 are provided; a connector 2, adapted to be placed between the staircase body 1 and a connecting platform; a first clearance hole 21 matching the first bolt hole 14 is provided on the connector 2, and a connecting bolt 23 matching the second bolt hole 15 is provided on the connector 2; a trapezoidal toothed groove 24 is formed on the side of the connector 2 facing away from the staircase body 1.

[0021] Figure 1 This is a schematic diagram of an embodiment of a prefabricated staircase according to this utility model. Figure 1 As shown, in one or more embodiments, the prefabricated staircase of this utility model includes a staircase body 1 and a connector 2.

[0022] See also Figure 1The staircase body 1 includes steps 11, an upper fixing block 12, and a lower fixing block 13. The upper fixing block 12 and the lower fixing block 13 are connected to a connecting platform. In one or more embodiments, both the upper fixing block 12 and the lower fixing block 13 have first bolt holes 14 and second bolt holes 15 for mating with bolts on the connecting platform. When the bolts on the connecting platform correspond to the first bolt holes 14 and the second bolt holes 15, the staircase body 1 is directly installed on the connecting platform. Furthermore, handrail holes 16 are provided on the steps 11 for installing handrails. For example, bolts can also be replaced with reinforcing bars, as long as positioning and grouting are possible.

[0023] See also Figure 1 The connector 2 is arranged between the stair body 1 and the connecting platform, and is used when the positions of the first bolt hole 14 and the second bolt hole 15 on the stair body 1 do not correspond to the bolt positions on the connecting platform. In one or more embodiments, the connector 2 is generally rectangular in shape, and a first clearance hole 21 matching the first bolt hole 14 is provided on the connector 2. The bolt on the connecting platform passes through the first clearance hole 21 and extends into the first bolt hole 14 to facilitate grouting during later construction. Further, a second clearance hole 22 is provided on the connector 2. When installing the connector 2, the misaligned bolt on the connecting platform is first cut off, leaving a certain length. The misaligned bolt passes through the second clearance hole 22, and the upper end face of the misaligned bolt is flush with the upper surface of the connector 2. The specific cutting length can be calculated according to the preset elevation. Specifically, the second clearance hole 22 can be drilled at the construction site according to the site conditions. Further, a connecting bolt 23 matching the second bolt hole 15 is provided on the connector 2. The connecting bolt 23 is installed on the connector 2 by a welding structure. For example, the connecting bolts 23 are welded in the factory according to the spacing of the first bolt holes 14 and the second bolt holes 15 on the stair body 1. The connecting bolts 23 extend into the second bolt holes 15 for later grouting. Furthermore, a trapezoidal toothed groove 24 is formed on the side of the connector 2 facing away from the stair body 1 to enhance the connection stability between the connector 2 and the connecting platform and reduce the shear stress of the bolts when the connector 2 is installed on the connecting platform. Specifically, the trapezoidal toothed groove 24 extends along the length direction of the connector 2 and has three sections along the width direction of the connector 2. Furthermore, a fixing plate 25 is also provided on the connector 2. The fixing plate 25 is generally rectangular and is arranged between the left side of the stair body 1 and the connecting platform. Furthermore, a plug-in bolt 26 is provided on the fixing plate 25, extending horizontally from the fixing plate 25 towards the connecting platform. Mounting holes for the plug-in bolts 26 are pre-drilled on the connecting platform. The plug-in bolts 26 are inserted into the mounting holes and grout is injected to enhance the connection stability between the connector 2 and the connecting platform. It is understood that if the connector 2 is not required, the mounting holes are sealed during the initial leveling process or the subsequent sealing process.

[0024] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A prefabricated stair, characterized in that include: The staircase body (1) has a first bolt hole (14) and a second bolt hole (15) provided on it; A connector (2) is adapted to be placed between the stair body (1) and the connecting platform; a first clearance hole (21) matching the first bolt hole (14) is provided on the connector (2), and a connecting bolt (23) matching the second bolt hole (15) is provided on the connector (2); a trapezoidal toothed groove (24) is formed on the side of the connector (2) facing away from the stair body (1).

2. The assembled stair according to claim 1, wherein, A second clearance hole (22) is provided on the connector (2) to be matched with the bolts of the connecting platform.

3. The assembled stair according to claim 1, wherein, A fixing plate (25) is provided on the connector (2), and the fixing plate (25) is arranged perpendicular to the connector (2).

4. The assembled stair according to claim 3, wherein, A plug bolt (26) is provided on the fixing plate (25).

5. The assembled stair of claim 1, wherein, The connecting bolt (23) is welded to the connector (2).

6. The assembled stair of claim 1, wherein, Handrail holes (16) are provided on the main body of the staircase (1).

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