Prefabricated stair for fabricated building

Abstract

The utility model provides an assembly type building prefabricated staircase which comprises a concrete staircase body, a staircase steel reinforcement framework is poured in the concrete staircase body, the upper end of the staircase steel reinforcement framework is fixedly connected with an upper metal platform, and the lower end of the staircase steel reinforcement framework is fixedly connected with a lower metal platform. The lower metal platform and the upper metal platform are both poured in the concrete stair body, assembling grooves are formed in the surfaces of the lower metal platform and the upper metal platform in a penetrating mode, and two end openings of the assembling grooves are exposed out of the upper face and the lower face of the concrete stair body. According to the overall arrangement, during assembly on a construction site, position deviation between the assembly groove and the connecting piece reserved in the building does not need to be worried, and assembly can be completed as long as the connecting piece reserved in the building is located in the range of the assembly groove, so that a certain fault-tolerant space is achieved during assembly and connection in the overall assembly process, and the assembly efficiency is improved. And meanwhile, the two sides of the concrete stair body collide during assembly, and the concrete stair body can be prevented from being damaged.

Description

Technical Field

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

[0002] In prefabricated buildings, prefabricated stairs are an important component, offering advantages such as improved construction efficiency and guaranteed construction quality.

[0003] Precast stairs are produced in a prefabrication plant. According to the design drawings, concrete is poured into the corresponding stair molds to form the stairs. After they harden, they are transported to the predetermined location on the construction site, where they are lifted into place by a crane and connected to other building components.

[0004] However, existing prefabricated staircases used in prefabricated buildings usually have two pre-drilled connection holes. They are assembled and connected to the pre-embedded connectors in the building through these holes. If the pre-embedded connectors in the building deviate, assembly will be affected, thus affecting construction and thus having certain limitations.

[0005] Therefore, it is essential to invent a prefabricated staircase for prefabricated buildings. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a prefabricated staircase for prefabricated buildings, which adopts the following technical solution: a prefabricated staircase for prefabricated buildings, including a concrete staircase body, wherein: a staircase steel reinforcement skeleton is cast in the concrete staircase body, the upper end of the staircase steel reinforcement skeleton is fixedly connected to an upper metal platform, the lower end of the staircase steel reinforcement skeleton is fixedly connected to a lower metal platform, the lower metal platform and the upper metal platform are both cast in the concrete staircase body, and each of the lower metal platform and the upper metal platform has a through-hole assembly groove, the two ends of the assembly groove protruding from the upper and lower surfaces of the concrete staircase body;

[0007] The concrete staircase is reinforced with protective frames on both sides, and the protective frames are fixedly connected to the steel reinforcement frame, the lower metal platform, and the upper metal platform.

[0008] Handrail assembly holes are reserved on both sides of the main concrete staircase.

[0009] Each step of the concrete staircase is equipped with anti-slip grooves.

[0010] The lower metal platform and the upper metal platform are each provided with annular protrusions corresponding to the assembly groove on their upper and lower surfaces, and the annular protrusions are cast in the concrete staircase body.

[0011] The surfaces of the lower metal platform and the upper metal platform are each provided with a number of connecting holes and weight-reducing holes, and concrete is poured into the connecting holes and weight-reducing holes.

[0012] Both the assembly groove and the inner surface of the annular protrusion are provided with a mating groove.

[0013] The staircase protection frame includes a first side plate, a second side plate, and connecting columns. The first side plate and the second side plate are fixedly connected by several connecting columns. The first side plate and the second side plate are fixedly connected to the lower metal platform, the upper metal platform, and the staircase steel reinforcement frame, respectively. The connecting columns are fixedly connected to the staircase steel reinforcement frame and are cast in the concrete staircase body.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] The overall design of this utility model eliminates concerns about positional deviations between the assembly slot and the pre-installed connectors in the building during on-site assembly. As long as the pre-installed connectors are within the range of the assembly slot, assembly can be completed. This provides a certain margin of error during assembly and connection, and also prevents damage to the concrete staircase structure from collisions on both sides during assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the staircase safety frame, lower metal platform, and upper metal platform structure of this utility model.

[0019] In the picture:

[0020] Side panel 1, Side panel 2, Connecting column 3, Lower metal platform 4, Upper metal platform 5, Assembly groove 6, Annular protrusion 7, Connecting hole 8, Weight reduction hole 9, Connecting groove 10, Concrete staircase body 11, Anti-slip groove 12, Handrail assembly hole 13. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings: Example

[0024] Reference Figure 1-3 A prefabricated staircase for prefabricated buildings includes a concrete staircase body 11, wherein: a staircase steel reinforcement skeleton is cast in the concrete staircase body 11, the upper end of the staircase steel reinforcement skeleton is welded to an upper metal platform 5, and the lower end of the staircase steel reinforcement skeleton is welded to a lower metal platform 4. Both the lower metal platform 4 and the upper metal platform 5 are cast in the concrete staircase body 11. The setting of the lower metal platform 4 and the upper metal platform 5 can improve the strength of the connection between the concrete staircase body 11 and the building assembly. Each of the lower metal platform 4 and the upper metal platform 5 has an assembly groove 6 through it. Both ends of the assembly groove 6 protrude from the upper and lower surfaces of the concrete staircase body 11. The setting of the assembly groove 6 provides a certain tolerance space when connecting with the connectors reserved in the building, thereby greatly improving the flexibility and convenience of the overall assembly process.

[0025] Specifically, the concrete staircase body 11 is reinforced with staircase protection frames on both sides. The staircase protection frames can protect the sides of the concrete staircase body 11 and prevent damage to the sides of the concrete staircase body 11 during transportation and assembly. The staircase protection frames are welded to the staircase steel reinforcement frame, the lower metal platform 4 and the upper metal platform 5 to ensure their strength.

[0026] Specifically, handrail mounting holes 13 are reserved on both sides of the concrete staircase body 11 so that the handrails required for the concrete staircase body 11 can be installed through the handrail mounting holes 13.

[0027] Specifically, each step of the concrete staircase 11 is equipped with anti-slip grooves 12 to increase friction and prevent slipping during the process of people going up and down the stairs.

[0028] Specifically, the lower metal platform 4 and the upper metal platform 5 are each provided with annular protrusions 7 corresponding to the assembly groove 6 on their upper and lower surfaces. The annular protrusions 7 are cast in the concrete stair body 11 to increase the bonding area with the concrete stair body 11.

[0029] Specifically, several connecting holes 8 and weight-reducing holes 9 are opened through the surfaces of the lower metal platform 4 and the upper metal platform 5, and concrete is poured into the connecting holes 8 and weight-reducing holes 9 in order to increase the bonding area and bonding strength with the concrete staircase body 11.

[0030] Specifically, the inner surfaces of the assembly groove 6 and the annular protrusion 7 are provided with connecting grooves 10. With the setting of connecting grooves 10, after the concrete staircase body 11 is assembled with the building, concrete can be poured in the assembly groove 6 to fix the assembly groove 6 and the connectors reserved in the building together, and improve the bonding area and bonding strength of the concrete.

[0031] Specifically, the stair protection frame includes side plate 1, side plate 2, and connecting column 3. Side plate 1 and side plate 2 are fixedly connected by several connecting columns 3 to ensure the stability between side plate 1 and side plate 2. Side plate 1 and side plate 2 are welded to the lower metal platform 4, the upper metal platform 5, and the stair steel reinforcement skeleton, respectively. The connecting column 3 is welded to the stair steel reinforcement skeleton and is cast in the concrete stair body 11 to improve the strength between the stair protection frame and the lower metal platform 4, the upper metal platform 5, and the stair steel reinforcement skeleton.

[0032] In this embodiment, firstly, based on the aperture of the assembly groove 6, two connectors are reserved in the building, such as two vertical steel bars at the connection between the building and the stairs, so that the maximum distance between the two vertical steel bars is within the range of the assembly groove 6, thereby providing a certain margin of error during assembly and facilitating adjustment.

[0033] During later assembly, the two vertical steel bars can be inserted into the assembly slot 6, and concrete can be poured into the assembly slot 6 for fixation.

[0034] If the distance between the two reserved vertical steel bars is greater than the diameter of the assembly slot 6, the two vertical steel bars can be bent so that the ends are close together, and then inserted into the assembly slot 6. Concrete can then be poured into the assembly slot 6 to fix it.

[0035] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A prefabricated stair for use in a fabricated building, characterized in that: The system includes a concrete staircase body (11), wherein: a staircase steel reinforcement skeleton is cast in the concrete staircase body (11), the upper end of the staircase steel reinforcement skeleton is fixedly connected to the upper metal platform (5), the lower end of the staircase steel reinforcement skeleton is fixedly connected to the lower metal platform (4), the lower metal platform (4) and the upper metal platform (5) are both cast in the concrete staircase body (11), and each of the lower metal platform (4) and the upper metal platform (5) has a through-hole assembly groove (6), and the two ends of the assembly groove (6) protrude from the upper and lower surfaces of the concrete staircase body (11); The concrete staircase body (11) has a staircase protection frame cast on both sides. The staircase protection frame is fixedly connected to the staircase steel reinforcement frame, the lower metal platform (4) and the upper metal platform (5). The concrete staircase body (11) has handrail assembly holes (13) reserved on both sides.

2. A prefabricated staircase for prefabricated buildings as described in claim 1, characterized in that: Each step of the concrete staircase body (11) is provided with anti-slip grooves (12).

3. A prefabricated staircase for prefabricated buildings as described in claim 2, characterized in that: The lower metal platform (4) and the upper metal platform (5) are each provided with annular protrusions (7) corresponding to the assembly groove (6) on their upper and lower surfaces. The annular protrusions (7) are cast in the concrete staircase body (11).

4. A prefabricated staircase for prefabricated buildings as described in claim 3, characterized in that: The surfaces of the lower metal platform (4) and the upper metal platform (5) are each provided with a number of connecting holes (8) and weight-reducing holes (9), and concrete is poured into the connecting holes (8) and weight-reducing holes (9).

5. A prefabricated staircase for prefabricated buildings as described in claim 3, characterized in that: The inner surfaces of the assembly groove (6) and the annular protrusion (7) are both provided with a connecting groove (10).

6. A prefabricated staircase for prefabricated buildings as described in claim 1, characterized in that: The staircase protection frame includes a first side plate (1), a second side plate (2), and a connecting column (3). The first side plate (1) and the second side plate (2) are fixedly connected by several connecting columns (3). The first side plate (1) and the second side plate (2) are fixedly connected to the lower metal platform (4), the upper metal platform (5), and the staircase steel reinforcement skeleton, respectively. The connecting column (3) is fixedly connected to the staircase steel reinforcement skeleton. The connecting column (3) is cast in the concrete staircase body (11).

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