Limiting joint for upper end and lower end of prefabricated stair connecting steel bar

Abstract

The utility model relates to the technical field of prefabricated steel bar frames, and discloses a prefabricated stair connecting steel bar upper and lower end limiting joint which comprises a steel bar net piece composed of transverse steel bars and vertical steel bars, and limiting assemblies are installed at the upper end and the lower end of the steel bar net piece. Each limiting assembly is formed by symmetrically connecting two cross-shaped hoops in an attached mode, the inner walls of the cross-shaped hoops are connected with the outer sides of the steel bars in an attached mode, and the two cross-shaped hoops are fixedly connected through bolts. The transverse reinforcing steel bars and the vertical reinforcing steel bars are fixed together through the limiting assemblies, installation of the limiting assemblies is usually faster and simpler than welding, and due to the fact that the limiting assemblies do not need to be subjected to high-temperature heating and cooling processes like welding, construction efficiency can be remarkably improved, and the construction period is shortened. The limiting assembly can provide additional supporting and fixing, and when the stair forms a final structure by pouring concrete, the limiting assembly can be completely wrapped in the concrete, and the limiting assembly and other parts of the stair form a whole.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated steel bar frames, in particular to a limit node for the upper and lower ends of connecting steel bars of a prefabricated staircase. Background Technique

[0002] The connecting steel bars of prefabricated staircases are the steel bars used to connect various parts of the staircase during the production process of prefabricated staircases. These steel bars are pre-installed and fixed during the manufacturing stage of the staircase so that during the subsequent installation process, various parts of the staircase can be firmly connected together. During the prefabrication process of the staircase, concrete is poured for the staircase with the steel bars already installed. The pouring of concrete wraps the steel bars inside, forming an integral structure, thereby enhancing the strength and stability of the staircase. In prefabricated staircases, horizontal and vertical steel bars need to be welded to ensure the connection strength between the steel bars, which is used to increase the longitudinal stability and load-bearing capacity of the staircase.

[0003] However, the existing technical solutions still have the following problems:

[0004] During the welding process, due to the uneven distribution of temperature and the differences in material properties, welding stress and cracks will be generated. These stresses and cracks may reduce the fatigue strength and durability of the staircase, and even cause safety accidents. The welding technology requires workers to have high operating skills and experience. If the operation is improper or the technical level is insufficient, it may lead to unstable welding quality or potential safety hazards. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a limit node for the upper and lower ends of connecting steel bars of a prefabricated staircase to at least solve one of the problems raised in the background technique, such as improving construction efficiency, reducing steel bar deformation, and enhancing the structural stability and safety of the staircase.

[0006] To achieve the above object, the utility model provides the following technical solution: A limit node for the upper and lower ends of connecting steel bars of a prefabricated staircase, including a steel bar mesh composed of horizontal and vertical steel bars. Limit components are installed at the upper and lower ends of the steel bar mesh. The limit components are symmetrically and fittingly connected by two cross hoops. The inner wall of the cross hoop is in fitting connection with the outer side of the steel bar, and the two cross hoops are fixedly connected by bolts.

[0007] Further: One end of the cross hoop is fixedly connected with a fixing plate. A circular hole matching the bolt is opened on the surface of the fixing plate. The bolt passes through the circular hole, and the two fixing plates are fixedly connected by bolts.

[0008] Further: A clamping block is fixedly connected to the surface of one of the cross hoops, and a clamping groove into which the clamping block is inserted is opened on the surface of the other cross hoop, and the outer side of the clamping block is in fitting connection with the inner wall of the clamping groove.

[0009] Furthermore, the bottom of the groove of the cross hoop is arc-shaped.

[0010] Furthermore, a rubber pad is fixedly connected to the inner wall of the cross hoop.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] In the present utility model, the horizontal and vertical steel bars are fixed together by using the limiting component. The installation of the limiting component is usually faster and simpler than welding because they do not require high-temperature heating and cooling processes like welding, which can significantly improve the construction efficiency and shorten the construction period. The limiting component can provide additional support and fixation. When the staircase is formed into the final structure by pouring concrete, the limiting component will be completely wrapped in the concrete and form an integral body with other parts of the staircase. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0014] Figure 2 is a schematic three-dimensional structure diagram of the limiting component of the present utility model;

[0015] Figure 3 is a schematic diagram of the disassembly of the three-dimensional structure of the limiting component of the present utility model.

[0016] In the figure: 1, limiting component; 2, cross hoop; 3, fixing plate; 301, circular opening; 4, bolt; 5, card slot; 6, card block; 7, rubber pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0018] As Figures 1 to 3 shown, a precast staircase connecting steel bar upper and lower end limiting node includes a steel bar mesh composed of horizontal and vertical steel bars. Limiting components 1 are installed at the upper and lower ends of the steel bar mesh. The limiting component 1 is composed of two cross hoops 2 symmetrically and fittingly connected. The inner wall of the cross hoop 2 is in fitting connection with the outer side of the steel bar, and the two cross hoops 2 are fixedly connected by bolts 4.

[0019] As Figures 1 to 3As shown, when a precast staircase connecting steel bar upper and lower end limit node in the utility model is in use, the symmetrical fitting connection of the two cross hoops 2 can ensure that the steel bars at the upper and lower ends of the steel bar mesh are evenly fixed, avoiding structural deformation or loosening caused by uneven stress. The cross hoops 2 are used to clamp the horizontal and vertical steel bars inside to ensure the stability of the steel bar mesh. It can provide strong binding force to prevent the steel bars from shifting or deforming during concrete pouring, and can also ensure the overall strength of the staircase structure. By fixing and connecting the two cross hoops 2 with bolts 4, it can be conveniently installed and disassembled, and at the same time, it is also convenient to finely adjust the limit assembly 1 during the pouring process to ensure its accurate position. Since the limit assembly 1 is connected by bolts 4, it can be adjusted according to actual needs to adapt to steel bar meshes of different sizes and shapes.

[0020] As Figure 2 shown, one end of the cross hoop 2 is fixedly connected with a fixing plate 3. A circular opening 301 matching the bolt 4 is formed on the surface of the fixing plate 3. The bolt 4 passes through the circular opening 301, and the two fixing plates 3 are fixedly connected by the bolt 4.

[0021] Specifically, through this setting, the cross hoop 2 can closely fit on the intersection points of the steel bar mesh, and one end of it is fixedly connected with a fixing plate 3. A circular opening 301 matching the bolt 4 is formed on the surface of the fixing plate 3, which enables the bolt 4 to easily pass through the circular opening 301, thereby tightly fixing the two fixing plates 3 together. The use of the bolt 4 connection method makes the installation process simple and fast, without complex welding or riveting processes. In addition, the tightening force of the bolt 4 connection can be controlled by adjusting the tightening degree of the bolt 4, thereby ensuring the stability of the connection.

[0022] As Figure 3 shown, a clamping block 6 is fixedly connected to the surface of one of the cross hoops 2, and a clamping groove 5 for inserting and connecting with the clamping block 6 is formed on the surface of the other cross hoop 2, and the outer side of the clamping block 6 is in close fit with the inner wall of the clamping groove 5.

[0023] Specifically, through this setting, due to the interaction of the clamping block 6 and the clamping groove 5, the two cross hoops 2 can be quickly connected together without additional tools or complex operations, thereby improving the construction efficiency. Once the clamping block 6 is completely inserted into the clamping groove 5, the two cross hoops 2 will be firmly connected together. Due to the close fit between the outer side of the clamping block 6 and the inner wall of the clamping groove 5, this connection method has high stability and can effectively prevent the steel bars from shifting or deforming during concrete pouring.

[0024] As Figures 2 to 3 shown, the bottom of the groove of the cross hoop 2 is arranged in an arc shape.

[0025] Specifically, through this design of setting the arc-shaped groove bottom, it can better adapt to the shape of the steel bars. Steel bars often present a certain arc at the intersection points, while the traditional straight groove bottom may not be able to fully fit this arc, resulting in loose connection. The arc-shaped groove bottom, on the other hand, can better fit the shape of the steel bars, ensuring a tight connection between the cross stirrup 2 and the steel bars, thereby improving the stability and reliability of the connection.

[0026] As Figures 2 to 3 shown, a rubber pad 7 is fixedly connected to the inner wall of the cross stirrup 2.

[0027] Specifically, the addition of this rubber pad 7 can significantly enhance the friction between the cross stirrup 2 and the steel bars. Since the material of the rubber pad 7 generally has good anti-slip and wear resistance, it can ensure that the steel bars will not easily slide or shift at the connection points, thereby improving the stability and safety of the entire staircase structure.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast staircase connecting steel bar upper and lower end limit node, characterized in that, It includes a steel bar mesh composed of horizontal and vertical steel bars. Limit components (1) are installed at the upper and lower ends of the steel bar mesh. The limit component (1) is composed of two cross hoops (2) symmetrically and fittingly connected. The inner wall of the cross hoop (2) is in fitting connection with the outer side of the steel bar, and the two cross hoops (2) are fixedly connected by bolts (4).

2. The upper and lower end limit nodes of the connecting steel bars of the precast staircase according to claim 1, characterized in that: One end of the cross hoop (2) is fixedly connected with a fixing plate (3). A circular opening (301) matching the bolt (4) is formed on the surface of the fixing plate (3). The bolt (4) passes through the circular opening (301), and the two fixing plates (3) are fixedly connected by the bolt (4).

3. A precast staircase connecting steel bar upper and lower end limit node according to claim 1 or 2, characterized in that: A clamping block (6) is fixedly connected to the surface of one of the cross hoops (2), and a clamping groove (5) for inserting and connecting with the clamping block (6) is formed on the surface of the other cross hoop (2), and the outer side of the clamping block (6) is in fitting connection with the inner wall of the clamping groove (5).

4. The upper and lower end limit nodes of the connecting steel bars of a precast staircase according to claim 1 or 2, characterized in that: The bottom of the groove of the cross hoop (2) is arranged in an arc shape.

5. A precast staircase connecting steel bar upper and lower end limit node according to claim 3, characterized in that: The bottom of the groove of the cross hoop (2) is arranged in an arc shape.

6. A precast staircase connecting steel bar upper and lower end limit node according to claim 1, 2 or 5, characterized in that: A rubber pad (7) is fixedly connected to the inner wall of the cross hoop (2).

7. A precast staircase connecting steel bar upper and lower end limiting node according to claim 3, characterized in that: A rubber pad (7) is fixedly connected to the inner wall of the cross hoop (2).

8. A precast staircase connecting steel bar upper and lower end limit node according to claim 4, characterized in that: A rubber pad (7) is fixedly connected to the inner wall of the cross hoop (2).

Images